CN204854793U - Alkali all -metal of antiaciding flow temperature sensor - Google Patents
Alkali all -metal of antiaciding flow temperature sensor Download PDFInfo
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- CN204854793U CN204854793U CN201520388578.9U CN201520388578U CN204854793U CN 204854793 U CN204854793 U CN 204854793U CN 201520388578 U CN201520388578 U CN 201520388578U CN 204854793 U CN204854793 U CN 204854793U
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Abstract
The utility model discloses an alkali all -metal of antiaciding flow temperature sensor, including casing, probe and electric part, the casing includes, the shell of acid and alkali -resistance metal preparation to and the fixed bolster of insulating material preparation, the fixed bolster inlays to be located in the inner chamber of shell, the fixed bolster have be used for the installation the installation department of circuit board and holding the cavity of circuit board. The beneficial effect who adopts this technical scheme is: the casing adopts the all -metal material, and is anticorrosive durable to possible very high sealed grade need not to adopt embedment technology again, simple structure, and installation, easy maintenance, it is small, with low costs, handsome in appearance. The design of fixed bolster has improved insulating protection level, possesses advantages such as the antidetonation is moved, reliability height simultaneously.
Description
Technical field
The utility model relates to a kind of fluid detection instrument in instrument and meter industry, particularly relates to a kind of antiacid alkali all-metal flow temperature sensor.
Background technology
In the prior art, be two independent products for the flow of fluid and temperature detection.
Flow sensor is used in flux monitoring system, when flow velocity reaches the flow velocity threshold values of setting, produces detection signal, for starting interlock protection system; Their complex structure is heavy, installs difficulty, the easy temperature influence of precision and being deteriorated, poor anti jamming capability, and gas, liquid can not be general.Temperature sensor is used for displays temperature and produces control signal, and charactron is used for display button setting menu state.
Above two kinds of equipment are the most frequently used in automated system, can use this two classes sensor in most systems simultaneously, as two equipment independently, operation, safeguard and install all more loaded down with trivial details, bring the complicated and integrity problem of system wiring simultaneously.Conventional flow sensor or temperature sensor, do not possess and carry out the functions such as Automatic Control, warning, startup interlock protection system to detection signal, and most embedding is main; complex process, cost are high, maintenance is inconvenient; corrosion resistance is poor, and volume is comparatively large, and moulding is attractive in appearance not.
Utility model content
For solving the problem, the purpose of this utility model is that providing a kind of unites two into one flow sensor and temperature sensor, possess all functions of temperature sensor and flow sensor, reliability is high, accuracy of detection is accurate, antijamming capability is strong, can carry out flow and monitor in real time gas, liquid and other medium; Adopt over-surplus fit structure, do not need embedding, degree of protection can reach IP68, IP69K food hygiene grade; Housing adopts all-metal material, anticorrosion durable; Structure is simple, and installation, maintenance is convenient, and volume is little, cost is low, antiacid alkali all-metal flow temperature sensor handsome in appearance.
For achieving the above object, the technical solution of the utility model is:
A kind of antiacid alkali all-metal flow temperature sensor, comprise housing, probe and electric part, described electric part is arranged in described housing, described electric part comprises detecting unit, circuit board, display unit, external control unit outside, described detecting unit comprises temperature detecting unit, flow detection unit, and described temperature detecting unit, flow detection unit are installed in described probe;
Described housing comprises, the shell of acid and alkali-resistance preparation of metals, and fixed support prepared by isolation material, described fixed support is embedded in the inner chamber of described shell, and described fixed support has the installation portion for installing described circuit board and holds the cavity of described circuit board.
The beneficial effect of employing the technical program is: flow sensor and temperature sensor are united two into one, possess all functions of temperature sensor and flow sensor, reliability is high, accuracy of detection is accurate, antijamming capability is strong, can carry out flow and monitor in real time gas, liquid and other medium, housing adopts all-metal material, anticorrosion durable, and very high sealing grade can be accomplished, without the need to adopting dosing technology again, structure is simple, and installation, maintenance is convenient, volume is little, cost is low, handsome in appearance.Support bracket fastened design, improves insulating protection grade, possesses anti-vibration, high reliability simultaneously.Adopt metal shell, just can adopt over-surplus fit structure, not need embedding, degree of protection can reach IP68, IP69K food hygiene grade.
Further, described circuit board comprises at least independently two pieces, described support bracket fastened cavity is upper cavity and the lower chamber of separate sealing, and described circuit board is arranged in described upper cavity and lower chamber respectively, and the connecting line in described upper and lower cavity between circuit board is by following vibrational power flow:
The pre-buried connecting line of one or metal column on described upper and lower cavity, circuit board in described upper and lower cavity is connected by described connecting line, or contact is set on circuit boards, the circuit board in described upper and lower cavity is contacted with corresponding metal column by described contact and is realized being electrically connected;
Or dividing plate between upper and lower cavity arranges through hole and O-ring seal, then a connecting line is set through described through hole and O-ring seal, the circuit board in described upper and lower cavity is connected by described connecting line.
Further raising sealing grade, increases the service life.The mode that metal column is connected with contact, makes to install more simple, improves electrical connection contact area simultaneously, improve electrical reliability.In addition, the metal column of fixing integral packaging has stability and the shock resistance of height, overcomes original line and connects the problem easily loosening, come off, break, also can cancel connector or welding sequence, remove and install all more convenient simultaneously.
Further, the circuit be arranged on described circuit board comprises:
The temperature filtering circuit that input end is connected with described temperature detecting unit output terminal; The output signal of described temperature filtering circuit inputs to central processing circuit and processes;
The differential amplifier that input end is connected with flow detection unit output terminal, input end and described differential amplifier output terminal connection traffic filtering circuit; The output signal of described flow filtering circuit inputs to central processing circuit and processes;
As the central processing circuit of data processor, described central processing circuit is provided with temperature drift compensating circuit and voltage range learning circuit;
D/A change-over circuit, the input end of described D/A change-over circuit is connected with an output terminal of described central processing circuit, described voltage range learning circuit provides digital reference signal for described D/A change-over circuit, the output terminal of described D/A change-over circuit is connected with the input end of reference voltage module, and digital reference signal is converted to analog reference signal to reference voltage module by described D/A change-over circuit;
Reference voltage module, its output terminal is connected with described differential amplifier, described reference voltage module by after analog reference signal process, for differential amplifier provides reference voltage;
Display driver circuit, its input end is connected with described central processing circuit, and its output terminal is respectively equipped with temperature output terminal and flow output terminal; Described display driver circuit is also provided with gyroscope or gravity sensing device, as required, can adjust the direction of numerical monitor on temperature display circuit and flow indication circuit;
Described display unit comprises:
Temperature display circuit, its input end is connected with described temperature output terminal, and the temperature detection information that display is corresponding;
Flow indication circuit, its input end is connected with described flow output terminal, and the flow detection information that display is corresponding;
Described temperature detecting unit, flow detection unit gather the temperature signal of measured medium respectively, flow signal is transferred to described central processing circuit, and data export and/or display value signal respectively by described temperature display circuit, flow indication circuit after treatment.
There is flow autolearn feature, so-called learning functionality, mainly carries out height study, by spikes/low-points study to measurement setting scope, user can select a point as switching point (threshold values) within the scope of this, exports if having signal when reaching switching point; Meanwhile, can report to the police if detect medium below or above this scope (namely lower than low spot or higher than high point).Its threshold values can be set by external key or long-range adjustment.Further, the utility model is also provided with gyroscope or gravity sensing device, can be as required, the direction of numerical monitor on adjustment display module, like this, sensor is regardless of installation position and installation site, can by adjustment numerical monitor direction, convenient working personnel read data, overcome display direction in prior art and immobilize, and the problem of parameter inconvenience is read in some installation site.
Further, described circuit also comprises:
Temperature output circuit, its input end is connected with described central processing circuit, and its output terminal is connected with an input end of output protection circuit;
Flow output circuit, its input end is connected with described central processing circuit, and its output terminal is connected with another input end of output protection circuit;
Output protection circuit, its output terminal is connected with an input end of described central processing circuit, if temperature signal and/or flow signal exceed setting value, starts triggering central processing circuit the protection circuit being arranged at its inside.
Further, described circuit is also provided with immunity module.
Further, described central processing circuit respectively corresponding flow exports and temperature output generation two-way pilot signal, when the output type of described pilot signal is output switch parameter, exported by NPN triode, PNP triode or relay, when the output type of described pilot signal is analog output, output current is 4 ~ 20mA, output voltage is 0 ~ 10V.
Further, described housing comprises upper cover and lower cover, and be covered with top draw-in groove and bottom draw-in groove 2 draw-in grooves under described, described top draw-in groove is provided with O-ring seal, and described bottom draw-in groove is provided with sealing gasket, and upper cover and lower cover pass through interference fit seal.
Further, described fixed support is arranged in described upper cover, and described fixed support is 2 symmetrical plastic parts, described plastic parts is semiellipse shape, semielliptical inwall is provided with bayonet socket, is used for fixing described circuit board, play vibrationproof, shielding, jamproof effect.
Further, described probe comprises probe and attaching nut, is provided with circular hole in the middle of described lower cover, circular hole is extended with a boss downwards, and described probe, through the circular hole in the middle of lower cover, is fixed with hold-down nut by interference fit.
Further, described probe top is provided with a circular hole, is provided with for strengthening product antijamming capability ground wire, described circular hole aperture≤1.5mm in described circular hole; Preferably, described probe top is provided with step, and step is provided with O-ring seal, and O-ring seal plays the effect of sealing when probe coordinates with lower cover, and probe is provided with 2 draw-in grooves, the draw-in groove on top by with attaching nut's clearance fit, then to fix with jump ring; Bottom draw-in groove is provided with O-ring seal, plays waterproof action.
Further, also be provided with the connector for connecting external cable on the housing, in certain embodiments, described connector comprises and is fixed on connecting portion on described shell and integral hermetic and is packaged on described shell and the hard contact being arranged in the cavity that described connecting portion is provided with, described hard contact is made up of metal column, and run through described shell and fixed support, and correspondingly with described circuit board to connect, described external cable is by being flexibly connected with the connector that described connecting portion mates, make each signal wire of external cable be electrically connected with described hard contact one_to_one corresponding simultaneously.Specifically, when manufacture connector, the number of contacts of first external connection as required, the metal column of preparation respective numbers (generally selects copper post, or copper post is silver-plated etc.), then at shell, the position of connecting portion and position boring corresponding to fixed support are installed, metal column is inserted one by one in the air above-mentioned, it is made to pass the fixed support of shell and enclosure, then with the gap between fluid sealant perfusion sealing metal post and shell and fixed support, reach the object of sealing, then being in place by connecting portion, (general connecting portion is a flanged (FLGD) hollow circuit cylinder, flange is for being fixed on shell (can bonding or screw fix) by connecting portion, hard contact covers by the cavity of cylinder, cylinder is provided with for mating with the plug of external cable the screw thread or buckle that are connected.
In order to further optimize above-mentioned encapsulation scheme, described hard contact is positioned at the outside surface of end face lower than described shell of the side of housing exterior, namely each hard contact to be arranged in a circular pit (when mounted, metal column is passed to enclosure, its outer surface is sunk in the through hole of shell), corresponding with it, be installed on the metal probe on the connector on external cable, described metal probe is provided with seal member, described seal member is that the material of the insulative water-proof that the cylinder of described metal probe wraps up is (as plastics, rubber or other there is flexible insulating material make), the top end face of described metal probe is exposed, when described metal probe one_to_one corresponding inserts the pit at described hard contact place, its end face is electrically connected with described hard contact, a part for its seal member and described pit outer wall interference fit, thus reach the object of sealing, now, even if whole sensor is all placed in conducting medium, also use is not affected.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the utility model antiacid alkali all-metal flow temperature sensor.
Fig. 2 is the cut-open view of the utility model antiacid alkali all-metal flow temperature sensor.
Fig. 3 is the schematic appearance of the utility model antiacid alkali all-metal flow temperature sensor.
Fig. 4 is the explosive view of the utility model antiacid alkali all-metal flow temperature sensor.
Wherein: 1. housing 11. upper cover 111. pressing sheet 112. shows cover 113. button 114. connector 115 plastic parts 12. lower cover 121. O-ring seal 122. sealing gasket 2. circuit part 3. and to pop one's head in 31. probe 311. O-ring seal 312. jump ring 313. O-ring seal 32. attaching nut 21. circuit board 22. detecting units
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figures 2 and 3, a kind of antiacid alkali all-metal flow temperature sensor, comprise housing 1, probe 3 and electric part 2, described electric part 2 is arranged in described housing 1, described electric part 2 comprises detecting unit, circuit board 21, display unit (display screen 112), external control unit outside (button 113), described detecting unit comprises temperature detecting unit and flow detection unit, described temperature detecting unit, it is inner that flow detection unit is installed on described probe, described housing 1 comprises, the shell of acid and alkali-resistance preparation of metals, and fixed support prepared by isolation material (concrete use plastic parts 115, also can be other isolation material, as rubber, other high molecular polymer etc.), described fixed support is embedded in the inner chamber of described shell, described fixed support has for installing the installation portion of described circuit board 21 and holding the cavity of described circuit board.
The beneficial effect of employing the technical program is: flow sensor and temperature sensor are united two into one, possess all functions of temperature sensor and flow sensor, reliability is high, accuracy of detection is accurate, antijamming capability is strong, can carry out flow and monitor in real time gas, liquid and other medium, housing adopts all-metal material, anticorrosion durable, and very high sealing grade can be accomplished, without the need to adopting dosing technology again, structure is simple, and installation, maintenance is convenient, volume is little, cost is low, handsome in appearance.Support bracket fastened design, improves insulating protection grade, possesses anti-vibration, high reliability simultaneously.Adopt metal shell, just can adopt over-surplus fit structure, not need embedding, degree of protection can reach IP68, IP69K food hygiene grade.
Concrete as Fig. 1, 2, 3, shown in 4, antiacid alkali all-metal flow temperature sensor, comprise housing 1, probe 3 and electric part 2, electric part 2 is arranged in housing 1, electric part 2 comprises temperature detecting unit, flow detection unit, differential amplify, filtering circuit, central processing circuit (generally can select single-chip microcomputer, or the data processing circuit of other integrated circuit and peripheral cell composition), reference voltage module, D/A changes, temperature exports, flow exports, output protection, display driver, Temperature displaying, flow indication, external control, immunity module, power transfer module, wherein as required, the circuit such as temperature detecting unit, flow detection unit, differential amplify, filtering circuit, single-chip microcomputer, reference voltage module, D/A conversion, temperature output, flow output, output protection, display driver are arranged on one piece or two pieces or three pieces and above circuit board, Temperature displaying and flow indication can be integrated on one piece of display screen 112, also can be shown by two display screens respectively.
In actual applications, the structure that described housing 1 can adopt 11 lids and lower cover 12 to combine, convenient making and installation, described probe 3 comprises probe 31 and attaching nut 32, described probe 3 one end (upper end) is connected with lower cover 12, temperature detecting unit and flow detection unit are arranged on the other end (lower end and free end) of probe 3, and attaching nut 32 plays effect that is fixing, locking when mounted.
The circuit be arranged on described circuit board comprises:
The temperature filtering circuit that the temperature detecting unit that input end is connected with described temperature sensor, input end are connected with described temperature detecting unit output terminal; The output signal of described temperature filtering circuit inputs to single-chip microcomputer and processes;
The differential amplifier that the flow detection unit that input end is connected with described flow sensor, input end are connected with flow detection unit output terminal, input end and described differential amplifier output terminal connection traffic filtering circuit; The output signal of described flow filtering circuit inputs to single-chip microcomputer and processes;
As the single-chip microcomputer of data processor, described single-chip microcomputer is provided with temperature drift compensating circuit and voltage range learning circuit;
D/A change-over circuit, the input end of described D/A change-over circuit is connected with an output terminal of described single-chip microcomputer, described voltage range learning circuit provides digital reference signal for described D/A change-over circuit, the output terminal of described D/A change-over circuit is connected with the input end of reference voltage module, and digital reference signal is converted to analog reference signal to reference voltage module by described D/A change-over circuit;
Reference voltage module, its output terminal is connected with described differential amplifier, described reference voltage module by after analog reference signal process, for differential amplifier provides reference voltage;
Display driver circuit, its input end is connected with described single-chip microcomputer, and its output terminal is respectively equipped with temperature output terminal and flow output terminal; Described display driver circuit is also provided with gyroscope or gravity sensing device, as required, can adjust the direction of numerical monitor on temperature display circuit and flow indication circuit;
Described display unit comprises:
Temperature display circuit, its input end is connected with described temperature output terminal, and the temperature detection information that display is corresponding;
Flow indication circuit, its input end is connected with described flow output terminal, and the flow detection information that display is corresponding;
Described temperature detecting unit, flow detection unit gather respectively and are transferred to described single-chip microcomputer from the temperature signal of temperature sensor and flow sensor, flow signal, and data export and/or display value signal respectively by described temperature display circuit, flow indication circuit after treatment.
As shown in Figure 1, the Cleaning Principle of electric part is as follows:
Temperature detecting unit is used for detecting the temperature signal of measured medium, by the temperature signal of detection being transferred to single-chip microcomputer after filtering circuit process; Flow detection unit is used for detecting the flow velocity of measured medium and temperature, the flow velocity inductive reactance of flow detection unit inside is connected with single-chip microcomputer with temperature sense resistance, single-chip microcomputer output digit signals is to D/A modular converter, D/A modular converter by analog signal transmission to reference voltage module, Signal transmissions amplifies to differential amplify part by flow detection module together with reference voltage module, after filtering circuit process, be defeated by single-chip microcomputer, single-chip microcomputer carries out internal temperature drift compensation again; Voltage range learning device is connected to single-chip microcomputer, for manually arranging flow rate test scope; Single-chip microcomputer carries out flow and exports and temperature output after the flow signal of collection and temperature signal being carried out conversion process, output protection circuit is mainly used to detect output signal size, and the output signal of output protection unit collection is fed back to single-chip microcomputer, single-chip microcomputer judges whether to export normally; Meanwhile, single-chip microcomputer exports to driving display unit by serial communication, drives display unit to output signal to display module unit, is shown by charactron and LED to temperature signal and flow signal; External control unit outside can realize flow autolearn feature, can be realized by button study and distance learning two kinds of modes; Can also be used for learning the menu setting such as calibrated fluxes height, switching point selection, temperature unit selection and function selection by key control; Distance learning function is the same with button learning functionality, and difference is that distance learning is that the long-range cable of being drawn by " connector 114 " realizes height study, facilitates user's remote control.Power transfer module is mainly used to provide required voltage to unit; Immunity module is used for preventing the interference such as electromagnetism electrostatic, improves stability and the reliability of product.Described immunity module is mainly made up of one or two anti-interference element, then adopts some to strengthen jamproof skill when circuit layout.Immunity module removes above-mentioned metal shell, plastic parts, connects outside geodesic line, circuit is mainly realized by magnetic bead and common mode choke, add and PCB layout used some to strengthen jamproof layout skill, specifically, be provided with common mode choke at the input end of power supply, be used for suppressing the common mode interference signal in circuit; Meanwhile, at a magnetic bead in parallel below of choking coil, be used for eliminating the high-frequency interferencing signal in circuit; Meanwhile, power supply unit is connected with housing and connects the earth, with the inner excess charge of release circuit and interference, thus strengthens the interference free performance of product.
Further, described single-chip microcomputer respectively corresponding flow exports and temperature output generation two-way pilot signal, when the output type of described pilot signal is output switch parameter, exported by NPN triode, PNP triode or relay, when the output type of described pilot signal is analog output, output current is 4 ~ 20mA, output voltage is 0 ~ 10V.Be divided into by the way of output, two-wire system and three-wire system export.
When being necessary, described circuit can also be set up:
Temperature output circuit, its input end is connected with described single-chip microcomputer, and its output terminal is connected with an input end of output protection circuit;
Flow output circuit, its input end is connected with described single-chip microcomputer, and its output terminal is connected with another input end of output protection circuit;
Output protection circuit, its output terminal is connected with an input end of described single-chip microcomputer, if temperature signal and/or flow signal exceed setting value, starts triggering single-chip microcomputer the protection circuit being arranged at its inside.
Output protection unit can realize the multi-protective functions such as short-circuit protection, reverse polarity protection, overload protection.
Temperature display unit adopts 3 seven segment digital tubes displays temperature numerical value, and Temperature displaying can also carry out forward and reverse display by menu setting; Flow quantity display unit adopts 10 LED to show flow, from left to right word order, represents the size of flow with the number of LED luminescence.
As shown in Figure 3, housing 1 comprises upper cover 11 and lower cover 12, and upper cover 11 is provided with display cover 112, button 113, connector 114, and display cover 112 comprises temperature display unit A and flow quantity display unit B, display cover 112 is fixed from upper cover inside by pressing sheet 111, is used for showing current flow and temperature; Button 113 loads from the surface of housing, is used for learning the menu setting such as calibrated fluxes height, switching point selection, temperature unit selection and function selection; Connector 114 is provided with O-ring seal, stretches into housing from the circular hole of upper cover 11 side, and connector 114 is used for connecting external cable, while powering, can also be realized the function of remote flow study by external cable to circuit part; Plastic parts 115 is used for fixing circuit part 2, plays antidetonation, insulation, jamproof effect.
As shown in Figure 3, lower cover 12 is provided with 2 draw-in grooves, and top draw-in groove is provided with O-ring seal 121, and bottom draw-in groove is provided with sealing gasket 122, and O-ring seal 121 and sealing gasket 122 play the effect of water proof and dust proof.Double flute design substantially increases sealing property, plays waterproof, protection against the tide and dust-proof effect, also easily improves explosive-proof grade.Be provided with a circular hole in the middle of lower cover, circular hole is extended with a boss downwards.As shown in Figure 3, probe 3 comprises probe 31 and attaching nut 32, probe≤10mm, top is provided with step, step is provided with O-ring seal 311, and O-ring seal 311 plays the effect of sealing when probe 31 coordinates with lower cover 12, and probe is provided with 2 draw-in grooves, the draw-in groove on top by with attaching nut 32 clearance fit, then to fix with jump ring 312; Bottom draw-in groove is provided with O-ring seal 313, plays waterproof action.
Housing 1 comprises upper cover 11 and lower cover 12, and upper cover 11 and lower cover 12 all adopt metal material to make, and fixed, sealed by the O-ring seal 121 on lower cover 12 and sealing gasket 122 between upper cover 11 and lower cover 12 by interference fit; Probe 3 adopts anticorrosive to make, antiseptic power is stronger, probe 31 loads through the circular hole in the middle of lower cover 12, O-ring seal is added at probe 31 top, fixed by interference fit, then attaching nut 32 is through the draw-in groove clearance fit of probe 31 with probe top, then fixes with jump ring 312, and the draw-in groove of probe bottom adds O-ring seal to be prevented from leaking when installing.
As shown in table 1, be the utility model display menu.Wherein first be classified as and arrange menu, second is classified as menu function annotation, and the 3rd is classified as optimum configurations scope, and the 4th annotation being classified as the scope of setting, remarks illustrate menu object.Form last column is that distance learning line is arranged, and it is only for the learning functionality of flow, and identical with " high point learns " " low spot learns " function in menu, object is setting flow range.This function setting facilitates user, execute-in-place, and the white line in output line and positive source short circuit only need can operate by user.
Its method to set up, referring to Fig. 2, two buttons are arranged at display panel bottom, left side MODE/ENTER key is menu setting and confirms function, often be presented on charactron by a menu sequence, the right LEARN/SET key is setting parameter, with cooperation MODE/ENTER key, carry out optimum configurations (showing on charactron equally) to respective menu, parameter confirms again to press MODE/ENTER key.
Table 1:
In upper table: " SP1 " temperature switch point: after setting SP1, during when temperature rising or more than SP1 temperature value, output terminal is opened (often opening), (normally closed contrary); When the temperature decreases, reach or lower than SP1 temperature time, output terminal closes (often opening), (normally closed contrary).
" rp1 " is sluggish: after setting rP1, and during when temperature rising or more than SP1 temperature value, output terminal is opened (often opening), (normally closed contrary); When the temperature decreases, reach or lower than rP1 temperature time, output terminal closes (often opening), (normally closed contrary).
" dIS " display mode: under menu " dIS " pattern can setting display mode be " DEG C " or " °F ".
" OU1 " switch exports: under menu " OU1 " pattern, user can according to the requirements set flow temperature of oneself with often opening, flow temperature simultaneously normally closed, temperature often open that flow is normally closed, the normally closed flow of temperature often opens 4 kinds of patterns.
" p_d " oppositely exports: under menu " p_d " pattern, and can set the way of output is that forward shows or oppositely shows, and being set to " p " is then forward display, and being set to " d " is then oppositely display.
" SP " flow switch point: between the spikes/low-points of default, can select any point as SP point, and when flow meets or exceeds SP value, output terminal is opened (often opening), (normally closed contrary); When flow reach or lower than SP time, output terminal closes (often opening), (normally closed contrary).
Whether " rE " remote adjustment sets: under " rE " pattern, can set " long-range adjustment " function and open.If selected " EN ", then can be carried out the study of height by long-range cable; Otherwise, select " dEN ", then do not carry out the study of height by remote line cable.
" HIF " height point study: under " HIF " pattern, velocity of medium is adjusted to the Peak Flow Rate needed for system, current flow velocity is learnt and stores.
" LOF " low spot learns: under " LOF " pattern, velocity of medium is adjusted to the minimum flow velocity needed for system, learns and store current flow velocity.
" FAC " recovers factory setting: the setting of all menus, data is turned back to setting value when dispatching from the factory.
" long-range adjustment ": be the same with button learning functionality, difference is that distance learning is that the long-range cable of being drawn by " connector 114 " realizes height study, factory reset, facilitates user's remote control.
At some Code in Hazardous Special Locations, described circuit board comprises at least independently two pieces, described support bracket fastened cavity is upper cavity and the lower chamber of separate sealing, described circuit board is arranged in described upper cavity and lower chamber respectively, and the connecting line in described upper and lower cavity between circuit board is by following vibrational power flow:
The pre-buried connecting line of one or metal column on described upper and lower cavity, circuit board in described upper and lower cavity is connected by described connecting line, or contact is set on circuit boards, the circuit board in described upper and lower cavity is contacted with corresponding metal column by described contact and is realized being electrically connected;
Or dividing plate between upper and lower cavity arranges through hole and O-ring seal, then a connecting line is set through described through hole and O-ring seal, the circuit board in described upper and lower cavity is connected by described connecting line.
This programme improves sealing grade further, increases the service life.The mode that metal column is connected with contact, makes to install more simple, improves electrical connection contact area simultaneously, improve electrical reliability.In addition, the metal column of fixing integral packaging has stability and the shock resistance of height, overcomes original line and connects the problem easily loosening, come off, break, also can cancel connector or welding sequence, remove and install all more convenient simultaneously.
In other embodiment, the utility model is also provided with gyroscope or gravity sensing device,, can as required, the direction of numerical monitor on adjustment display module, like this, sensor, can by adjustment numerical monitor direction regardless of installation position and installation site, and convenient working personnel read data, overcome display direction in prior art to immobilize, the problem of parameter inconvenience is read in some installation site.
In order to improve the sealing property of product further, also be provided with the connector 114 for connecting external cable on the housing, in certain embodiments, described connector 114 comprises and is fixed on connecting portion on described shell 1 and integral hermetic and is packaged on described shell 1 and the hard contact being arranged in the cavity that described connecting portion is provided with, described hard contact is made up of metal column, and run through described shell and fixed support, and correspondingly with described circuit board to connect, described external cable is by being flexibly connected with the connector that described connecting portion mates, make each signal wire of external cable be electrically connected with described hard contact one_to_one corresponding simultaneously.Specifically, when manufacture connector, the number of contacts of first external connection as required, the metal column of preparation respective numbers (generally selects copper post, or copper post is silver-plated etc.), then at shell, the position of connecting portion and position boring corresponding to fixed support are installed, metal column is inserted one by one in the air above-mentioned, it is made to pass the fixed support of shell and enclosure, then with the gap between fluid sealant perfusion sealing metal post and shell and fixed support, reach the object of sealing, then being in place by connecting portion, (general connecting portion is a flanged (FLGD) hollow circuit cylinder, flange is for being fixed on shell (can bonding or screw fix) by connecting portion, hard contact covers by the cavity of cylinder, cylinder is provided with for mating with the plug of external cable the screw thread or buckle that are connected.
In order to further optimize above-mentioned encapsulation scheme, described hard contact is positioned at the outside surface of end face lower than described shell of the side of housing exterior, namely each hard contact to be arranged in a circular pit (when mounted, metal column is passed to enclosure, its outer surface is sunk in the through hole of shell), corresponding with it, be installed on the metal probe on the connector on external cable, described metal probe is provided with seal member, described seal member is that the material of the insulative water-proof that the cylinder of described metal probe wraps up is (as plastics, rubber or other there is flexible insulating material make), the top end face of described metal probe is exposed, when described metal probe one_to_one corresponding inserts the pit at described hard contact place, its end face is electrically connected with described hard contact, a part for its seal member and described pit outer wall interference fit, thus reach the object of sealing, now, even if whole sensor is all placed in conducting medium, also use is not affected.
Further, described circuit is also provided with immunity module.
For the ease of making, installation and maintenance, described housing comprises upper cover and lower cover, and be covered with top draw-in groove and bottom draw-in groove 2 draw-in grooves under described, described top draw-in groove is provided with O-ring seal, described bottom draw-in groove is provided with sealing gasket, and upper cover and lower cover pass through interference fit seal.
Further, described fixed support is arranged in described upper cover, described fixed support is 2 symmetrical plastic parts, described plastic parts is semiellipse shape, semielliptical inwall is provided with 15 bayonet sockets (quantity of bayonet socket can set arbitrarily as required), be used for fixing described circuit board, play vibrationproof, shielding, jamproof effect.As shown in Figure 4.
Further, described probe comprises probe and attaching nut, is provided with circular hole in the middle of described lower cover, circular hole is extended with a boss downwards, and described probe, through the circular hole in the middle of lower cover, is fixed with hold-down nut by interference fit.
Further, described probe top is provided with a circular hole, is provided with for strengthening product antijamming capability ground wire, described circular hole aperture≤1.5mm in described circular hole; Preferably, described probe top is provided with step, and step is provided with O-ring seal, and O-ring seal plays the effect of sealing when probe coordinates with lower cover, and probe is provided with 2 draw-in grooves, the draw-in groove on top by with attaching nut's clearance fit, then to fix with jump ring; Bottom draw-in groove is provided with O-ring seal, plays waterproof action.
Above-described is only preferred implementation of the present utility model; it should be pointed out that for the person of ordinary skill of the art, under the prerequisite not departing from the utility model creation design; can also make some distortion and improvement, these all belong to protection domain of the present utility model.
Claims (10)
1. an antiacid alkali all-metal flow temperature sensor, comprise housing, probe and electric part, it is characterized in that, described electric part is arranged in described housing, described electric part comprises detecting unit, circuit board, display unit, external control unit outside, described detecting unit comprises temperature detecting unit, flow detection unit, and described temperature detecting unit, flow detection unit are installed in described probe;
Described housing comprises, the shell of acid and alkali-resistance preparation of metals, and fixed support prepared by isolation material, described fixed support is embedded in the inner chamber of described shell, and described fixed support has the installation portion for installing described circuit board and holds the cavity of described circuit board.
2. antiacid alkali all-metal flow temperature sensor according to claim 1, it is characterized in that, described circuit board comprises at least independently two pieces, described support bracket fastened cavity is upper cavity and the lower chamber of separate sealing, described circuit board is arranged in described upper cavity and lower chamber respectively, and the connecting line in described upper and lower cavity between circuit board is by following vibrational power flow:
The pre-buried connecting line of one or metal column on described upper and lower cavity, circuit board in described upper and lower cavity is connected by described connecting line, or contact is set on circuit boards, the circuit board in described upper and lower cavity is contacted with corresponding metal column by described contact and is realized being electrically connected;
Or dividing plate between upper and lower cavity arranges through hole and O-ring seal, then a connecting line is set through described through hole and O-ring seal, the circuit board in described upper and lower cavity is connected by described connecting line.
3. antiacid alkali all-metal flow temperature sensor according to claim 1, it is characterized in that, the circuit be arranged on described circuit board comprises:
The temperature filtering circuit that input end is connected with described temperature detecting unit output terminal; The output signal of described temperature filtering circuit inputs to central processing circuit and processes;
The differential amplifier that input end is connected with flow detection unit output terminal, input end and described differential amplifier output terminal connection traffic filtering circuit; The output signal of described flow filtering circuit inputs to central processing circuit and processes;
As the central processing circuit of data processor, described central processing circuit is provided with temperature drift compensating circuit and voltage range learning circuit;
D/A change-over circuit, the input end of described D/A change-over circuit is connected with an output terminal of described central processing circuit, described voltage range learning circuit provides digital reference signal for described D/A change-over circuit, the output terminal of described D/A change-over circuit is connected with the input end of reference voltage module, and digital reference signal is converted to analog reference signal to reference voltage module by described D/A change-over circuit;
Reference voltage module, its output terminal is connected with described differential amplifier, described reference voltage module by after analog reference signal process, for differential amplifier provides reference voltage;
Display driver circuit, its input end is connected with described central processing circuit, and its output terminal is respectively equipped with temperature output terminal and flow output terminal; Described display driver circuit is also provided with gyroscope or gravity sensing device, as required, can adjust the direction of numerical monitor on temperature display circuit and flow indication circuit;
Described display unit comprises:
Temperature display circuit, its input end is connected with described temperature output terminal, and the temperature detection information that display is corresponding;
Flow indication circuit, its input end is connected with described flow output terminal, and the flow detection information that display is corresponding; Described temperature detecting unit, flow detection unit gather the temperature signal of measured medium respectively, flow signal is transferred to described central processing circuit, and data export and/or display value signal respectively by described temperature display circuit, flow indication circuit after treatment.
4. antiacid alkali all-metal flow temperature sensor according to claim 3, it is characterized in that, described circuit also comprises:
Temperature output circuit, its input end is connected with described central processing circuit, and its output terminal is connected with an input end of output protection circuit;
Flow output circuit, its input end is connected with described central processing circuit, and its output terminal is connected with another input end of output protection circuit;
Output protection circuit, its output terminal is connected with an input end of described central processing circuit, if temperature signal and/or flow signal exceed setting value, starts triggering central processing circuit the protection circuit being arranged at its inside.
5. antiacid alkali all-metal flow temperature sensor according to claim 4, it is characterized in that, also be provided with the connector for connecting external cable on the housing, described connector comprises and is fixed on connecting portion on described shell and integral hermetic and is packaged on described shell and the hard contact being arranged in the cavity that described connecting portion is provided with, described hard contact is made up of metal column, and run through described shell and fixed support, and correspondingly with described circuit board to connect, described external cable is by being flexibly connected with the connector that described connecting portion mates, make each signal wire of external cable be electrically connected with described hard contact one_to_one corresponding simultaneously, described connecting portion is a flanged (FLGD) hollow circuit cylinder, described flange is for being fixed on shell by connecting portion, hard contact covers by the cavity of described cylinder, cylinder is provided with for mating with the plug of external cable the screw thread or buckle that are connected, described hard contact is positioned at the outside surface of end face lower than described shell of the side of housing exterior, namely each hard contact is arranged in a circular pit, corresponding with it, be installed on the metal probe on the connector on external cable, described metal probe is provided with seal member, described seal member is the material of the insulative water-proof that the cylinder of described metal probe wraps up, the top end face of described metal probe is exposed, when described metal probe one_to_one corresponding inserts the pit at described hard contact place, its end face is electrically connected with described hard contact, a part for its seal member and described pit outer wall interference fit, thus reach the object of sealing.
6. antiacid alkali all-metal flow temperature sensor according to claim 4, it is characterized in that, described central processing circuit respectively corresponding flow exports and temperature output generation two-way pilot signal, when the output type of described pilot signal is output switch parameter, exported by NPN triode, PNP triode or relay, when the output type of described pilot signal is analog output, output current is 4 ~ 20mA, output voltage is 0 ~ 10V.
7. antiacid alkali all-metal flow temperature sensor according to claim 1, it is characterized in that, described housing comprises upper cover and lower cover, top draw-in groove and bottom draw-in groove 2 draw-in grooves are covered with under described, described top draw-in groove is provided with O-ring seal, described bottom draw-in groove is provided with sealing gasket, and upper cover and lower cover pass through interference fit seal.
8. antiacid alkali all-metal flow temperature sensor according to claim 7, it is characterized in that, described fixed support is arranged in described upper cover, described fixed support is 2 symmetrical plastic parts, described plastic parts is semiellipse shape, semielliptical inwall is provided with bayonet socket, is used for fixing described circuit board, play vibrationproof, shielding, jamproof effect.
9. antiacid alkali all-metal flow temperature sensor according to claim 7, it is characterized in that, described probe comprises probe and attaching nut, circular hole is provided with in the middle of described lower cover, circular hole is extended with a boss downwards, described probe through the circular hole in the middle of lower cover, is fixed with hold-down nut by interference fit.
10. antiacid alkali all-metal flow temperature sensor according to claim 9, it is characterized in that, described probe top is provided with a circular hole, is provided with for strengthening product antijamming capability ground wire, described circular hole aperture≤1.5mm in described circular hole; Preferably, described probe top is provided with step, and step is provided with O-ring seal, and O-ring seal plays the effect of sealing when probe coordinates with lower cover, and probe is provided with 2 draw-in grooves, the draw-in groove on top by with attaching nut's clearance fit, then to fix with jump ring; Bottom draw-in groove is provided with O-ring seal, plays waterproof action.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520388578.9U CN204854793U (en) | 2015-06-08 | 2015-06-08 | Alkali all -metal of antiaciding flow temperature sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520388578.9U CN204854793U (en) | 2015-06-08 | 2015-06-08 | Alkali all -metal of antiaciding flow temperature sensor |
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| CN204854793U true CN204854793U (en) | 2015-12-09 |
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| CN201520388578.9U Active CN204854793U (en) | 2015-06-08 | 2015-06-08 | Alkali all -metal of antiaciding flow temperature sensor |
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| WO2016197631A1 (en) * | 2015-06-08 | 2016-12-15 | 伊玛精密电子（苏州）有限公司 | Acid-base resistant all-metal flow temperature sensor |
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| WO2016197631A1 (en) * | 2015-06-08 | 2016-12-15 | 伊玛精密电子（苏州）有限公司 | Acid-base resistant all-metal flow temperature sensor |
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| CN105717896A (en) * | 2016-03-23 | 2016-06-29 | 无锡南理工科技发展有限公司 | Remote monitoring system |
| CN106323378A (en) * | 2016-08-26 | 2017-01-11 | 山西平阳重工机械有限责任公司 | Temperature, humidity and pressure measurement and display device used for sealed packaging box |
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