KR20140013363A - Pressure guage being able to sense pressure - Google Patents

Abstract

The present invention relates to an all-in-one pressure gauge for sensing pressure, and more particularly, to a pressure gauge which is detachably combined to a fluid or gas pipe, and of which an indicating needle is angled to correspond to a change in pressure of a fluid or a gas and thus to display sensed pressure with the indicating needle, and in which a needle position detecting unit is installed to detect an indicating needle as an electrical signal and deliver to a MiCom when the indicating needle points out a specific pressure in the indicator side of the pressure gauge, wherein the needle position detecting unit includes a photo coupler or a variable resistor. As a result, the number of parts assembling for the pressure gauge can be reduced, thereby reducing material costs and required work capacity, and additionally, increasing reliability of joints of the parts. In addition, the pressure gauge obtains a space, which was occupied by a pressure sensor and a pressure switch, resulting from parts integration, and the space may be utilized for arranging other parts. In addition, it is possible to avoid pressure sensing errors caused by a difference between a value indicated by the indicating needle and a value outputted by the pressure sensor or by the pressure sensor in a conventional pressure gauge. In addition, a cost price of the pressure gauge capable of receiving a pressure detection signal can be lowered. Moreover, it is easy to apply the pressure gauge to various fields according to pressure to be measured, and thus the pressure gauge can be used universally in various devices due to highly improved compatibility.

Description

[0001] Pressure gauge integrated pressure gauge [0002]

The present invention relates to a pressure-sensitive integrated pressure type pressure gauge, and more particularly, to a pressure-type integrated type pressure gauge that detects a position of a pointer on a display panel of a pressure gauge that displays pressure of various fluids or gases, It is possible to reduce the number of assembly parts and reduce the material cost and the air flow rate as well as to increase the reliability of assembly of the pressure gauge, In the pressure gauge application device, the pressure sensor and the pressure switch can be utilized for arranging other parts in the space where the pressure gauge is removed.

Generally, a pressure gauge (manometer) is a gauge for measuring the pressure of a gas or a liquid, and such a pressure gauge is a pressure gauge (pressure gauge) for the pressure of a closed circuit A pressure sensor or a pressure switch should be used.

Therefore, the pressure sensing part using the pressure sensor or the pressure switch must be separately provided in addition to the pressure sensing part of the pressure gauge, so that a separate connection part is required. In addition, since the connection part must be designed to have reliability at high pressure conditions, application of high- There is no cost increase due to the increase of material cost and assembling cost.

Accordingly, it is possible to monitor the movement of the fluid passing through the inside of the pipe from the remote place using the pressure sensor, and when the power supply is interrupted, the pressure of the fluid passing through the inside of the pipe is observed A pressure gauge has been developed which can prevent the occurrence of a safety accident by notifying the manager or the pressure control system in advance when the fluid pressure reaches a critical point at which the fluid pressure may deviate from a normal state in the process control and cause a process abnormality, 2001-0069678. ≪ / RTI >

However, the pressure gauge described above has a socket communicating with the fluid pipe to transmit fluid pressure; A Bourdon tube attached to the socket and changing its position according to fluid pressure; The pressure gauge is installed inside the pressure sensor hole formed on the side surface of the socket and simultaneously detects the fluid pressure flowing into the bourguign tube to convert the electric signal into an electric signal. A pressure sensor for generating pressure; An amplifying unit for amplifying a detection signal output from the pressure sensor; And a connector for transmitting an electric signal output from the amplifying unit. The pressure gauge is equipped with an alarm switch connected to the contact and outputting a warning signal when the pressure reaches a set value adjusted by the user have.

However, since the pressure-sensitive integrated type pressure gauge is configured such that a pressure sensor is separately installed in a small pressure gauge, it is necessary to install two fluid or gas inlet pipes in one pressure gauge, It is difficult to ensure reliability and the pressure gauge must be bulky due to the narrow space of the assembly space. Also, unlike a pressure switch operated by a single pressure, a pressure sensor capable of detecting various pressures is expensive components, There is a limit to grafting.

In addition, as described above, a separate component such as a pressure sensor or the like is provided in a pressure gauge for indicating the pressure as a guideline, and the pressure display value indicated by the pointer and the pressure value detected by the pressure sensor or the pressure switch The pressure gauge integrated type pressure gauge having such a configuration is used only for the measurement purpose, and thus there is a problem that the application field is limited.

Korean Patent Publication No. 2001-0069678 (July 25, 2001)

SUMMARY OF THE INVENTION The present invention has been made to solve such conventional problems, and it is an object of the present invention to provide a guiding position sensing means for sensing the position of a guiding element on a display panel of a pressure gauge, Position, it is possible to reduce the assembly cost of pressure gauge parts by reducing the number of assembly parts of pressure gauge parts by reducing pressure gauge itself by integrating pressure gauge itself, and it is possible to reduce material cost and air flow rate, And a pressure sensing integral type pressure gauge which can be utilized for arranging other components in a space where pressure sensors and pressure switches are removed in a pressure gauge-applied device due to the unification of parts.

It is another object of the present invention to provide a method of detecting the position of a pointer, not a method of directly detecting a pressure of a fluid or a gas, but detecting a pressure of a fluid or a gas within a predetermined pressure range, It is difficult to solve the problem due to the pressure detection error caused by the difference between the pressure display value indicated by the instruction and the pressure value detected through the pressure sensor or the pressure switch used in the conventional pressure gauge Pressure type pressure gauge integrated pressure gauge.

It is still another object of the present invention to provide a method and an apparatus for detecting a position of a pressure gauge by selectively installing only a portion required by a device to which a pressure gauge is to be applied, It is possible to reduce the cost burden of the pressure gauge itself which can receive the pressure sensing signal and it is also easy to apply the application by the pressure to be used, So that the compatibility of the pressure gauge can be significantly increased.

In order to achieve the above object, the pressure-sensitive integrated type pressure gauge of the present invention is a pressure gauge that is detachably coupled to a fluid or a gas pipe to change the angle of the pointer corresponding to the pressure change of the fluid or gas, Wherein a pointer position sensing means is provided for sensing the pointer as an electrical signal and delivering the pointer to the microcomputer when the pointer indicates a specific pressure position among the display plates of the pressure gauge.

In this case, the guiding position sensing means may include a photocoupler or a variable resistor.

When the photocoupler is provided as the guiding position sensing means, a reflective surface for reflecting light emitted from the light emitting element of the photocoupler toward the light receiving element is formed on the back surface of the pointer.

Further, when a variable resistor is provided as the guiding position sensing means, knob coupling pieces are provided on both sides of the guide so that the knob of the variable resistor can be changed in position through the sliding, And is molded.

When one photocoupler is installed as the guiding position sensing means on the display panel, the pressure gauge is installed at any one of the lower limit pressure sensing position or the upper limit pressure sensing position determined by the instrument using the pressure gauge.

When the plurality of photocouplers are installed as the guiding position sensing means, the photocouplers may be installed for each predetermined pressure unit within a range of 0.1 to 1.0 MPa.

In this case, when a plurality of photocouplers are installed as the guiding position sensing means, a pair of light emitting devices and light receiving devices, each of which is formed in one body, are integrally mounted at predetermined intervals.

In addition, the device is characterized in that the water tank comprises a boiler of the closed type.

When the guiding position sensing means is installed on the pressure gauge to be applied to the boiler, the guiding position sensing means is selectively installed at any one of the low water level sensing position and the maximum limit water level sensing position, or installed at both positions.

Further, when a plurality of guiding position sensing means are installed on the pressure gauge to be applied to the boiler, the low pressure sensing position, the optimum preset maximum water level sensing position, the first critical water level sensing position and the maximum critical water level sensing position are respectively provided .

On the other hand, on both sides of the guide, a wing for expanding the sensing range for expanding the sensing angle of the photocouplers installed as the position sensing means is further formed.

As described above, according to the pressure-sensitive integrated type pressure gauge of the present invention, the pointer position sensing means for sensing the position of the pointer on the display panel of the pressure gauge for displaying the pressure of fluid or gas through the pointer and outputting an electrical signal is provided at a desired position By installing one or more pressure gauges, one pressure gauge can be integrated into a pressure gauge integrated type that simultaneously performs pressure gauge indication and pressure gauge detection as electrical signals, thereby reducing the number of assembly parts of pressure gauge parts, It is possible to increase the reliability of the connection part according to the assembly of the pressure gauge parts and also to arrange other parts in the space where the pressure sensor and the pressure switch are removed in the pressure gauge application equipment due to the unification of the parts.

It is also possible to detect a fluid or a gas whose pressure falls within a predetermined pressure range through a method of detecting the position of the pointer instead of directly detecting the pressure of the fluid or the gas, It is possible to solve the problem due to the pressure detection error caused by the difference between the pressure display value indicated by the instruction and the pressure value detected through the pressure sensor or the pressure switch used in the conventional pressure gauge.

In addition, the guiding position sensing means is selectively installed only on a portion required by a device to which a pressure gauge is to be applied, and the microcomputer in the device receives the guiding position of the pressure gauge as an electrical signal through the respective guiding position sensing means, It is possible to reduce the cost burden of the pressure gauge itself which can receive the pressure sensing signal, and it is also easy to apply the pressure according to the pressure to be used, so that it can be used for general purpose in various devices And the compatibility of the pressure gauge can be greatly increased.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a pressure-sensitive integrated type pressure gauge of the present invention in a state of being coupled to a fluid or a gas pipe; FIG.
2 is a side view of the pressure-sensitive integrated type pressure gauge according to the present invention in a state where it is coupled between a fluid or a gas pipe and a microcomputer;
3 (a) - (c) are plan views illustrating states in which photocouplers are installed as a pointer position sensing means on a display panel of a pressure gauge to which the present invention is applied.
4 (a) and 4 (b) are a plan view and a perspective view illustrating a state in which a photocoupler in which several light emitting and light receiving elements are mounted on one body in a display panel of a pressure gauge to which the present invention is applied.
5A and 5B are a perspective view and a plan view illustrating a state in which a variable resistor is installed as a pointer position sensing means on a display panel of a pressure gauge to which the present invention is applied.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a state where a pressure-sensitive integrated type pressure gauge of the present invention is coupled to a fluid or a gas pipe, and FIG. 2 is a side view of the pressure gauge integrated type pressure gauge of the present invention, .

3 (a) - (c) are plan views illustrating states in which photocouplers are installed as a guiding position sensing means on a display panel of a pressure gauge to which the present invention is applied. FIGS. 4 (a) 5A and 5B are a plan view and a perspective view illustrating a state in which a photocoupler in which a plurality of light emitting and receiving elements are mounted on one body in a display panel of a pressure gauge to which the present invention is applied, In which a variable resistor is provided as a guiding position sensing means on a display panel of a pressure gauge to which the pressure gauge is applied.

According to this, in the pressure-sensitive integrated type pressure gauge of the present invention,

And a guide member 3 having a case 1 and a display panel 2, a guide 3 and a fluid or gas inlet pipe 4 and being detachably coupled to the fluid or gas pipe 200, 3) is changed and the pressure to be sensed is indicated as a guide,

A guiding position sensing means 5 for sensing the guideline 3 as an electrical signal and transmitting it to the microcomputer 300 when the guideline 3 indicates a specific pressure position among the display panels 2 of the pressure gauge 100 Is installed.

In this case, the pointer position sensing means 5 includes a photocoupler 51 or a variable resistor 52.

When the photocoupler 51 is provided as the guiding position sensing means 5,

And a reflecting surface 31 for reflecting the light emitted from the light emitting element 512 of the photocoupler 51 toward the light receiving element 513 is formed on the back surface of the guide 3.

Further, when the variable resistor 52 is installed in the pointer position sensing means 5,

On both sides of the guide 3, a knob engagement piece 32 for allowing the knob 521 of the variable resistor 52 to be changed in position through sliding in response to the rotation angle change of the pointer 3 is further bent And is molded.

On the other hand, when one photocoupler 51 is installed as the pointer position sensing means 5 on the display panel 2,

And is installed at any one of the lower limit pressure sensing position or the upper limit pressure sensing position which is set in the apparatus using the pressure gauge (100).

When a plurality of photocouplers 51 are installed as the guiding position sensing means 5,

And the photocouplers 51 are installed in a predetermined pressure unit within a range of 0.1 to 1.0 MPa.

At this time, when the plurality of photocouplers 51 are installed as the guiding position sensing means 5, a pair of the light emitting devices 512 and the light receiving devices 513 are arranged at a predetermined interval in one body 511 And is integrally mounted.

In addition, the device is characterized in that the water tank comprises a boiler of the closed type.

When the guiding position sensing means 5 is installed in the pressure gauge 100 to be applied to the boiler, the guiding position sensing means 5 may be selectively installed at any one of the low water level sensing position and the maximum limit water level sensing position, .

In addition, when a plurality of guiding position sensing means 5 are installed in the pressure gauge 100 to be applied to the boiler, the low water level sensing position, the optimum set maximum water level sensing position, the first critical water level sensing position and the maximum critical water level sensing position Is installed.

On the other hand, on both sides of the guide 3, a wing 33 for widening a range of the detection range for widening the angle of the guiding sensed by the photocouplers 51 installed in the guiding position sensing means 5 is further formed do.

The operation and effect of the pressure-sensitive integrated type pressure gauge of the present invention constructed as described above will be described below.

1 and 2, the present invention includes a case 1, a display panel 2, a guide 3, and a fluid or gas inflow pipe 4 and is detachably coupled to a fluid or gas pipe 200 The position of the pointer 3 on the display panel 2 of the known pressure gauge 100 which changes the angle of the pointer 3 in response to a change in the pressure of the fluid or gas and indicates the pressure to be sensed, The pressure sensing integrated type pressure gauge to which the present invention is applied is provided with a guiding position sensing means 5 for sensing a specific pressure position of the pressure sensing integrated type pressure gauge to which the present invention is applied. And transmits the detected signal to the microcomputer 300 as a main technical element.

That is, the guiding position sensing means 5 is provided at a predetermined specific pressure position in the sign 2 of the pressure gauge 100 so that the pressure sensed by one pressure gauge 100 can be displayed through the guideline 3 When the pointer 2 of the pressure gauge 100 itself is positioned in the pointer position sensing means 5 installed at a specific pressure position, the pointer 2 is transmitted to the microcomputer 300 as an electrical signal, And the pressure sensing integrated type that can be recognized by the pressure sensor 300 is regarded as a main technical component.

The present invention also includes a photocoupler 51 for receiving light received by the light receiving element 513 when the light generated by the light emitting element 512 is reflected by a specific object and returned to the pointer position sensing means 5 Any one of the variable resistors 52 whose resistance value is changed and the position of the knob 521 is changed when the angle of the pointer 3 is changed corresponding to the change of the pressure is adopted.

In order to reflect light emitted from the light emitting element 512 of the photocoupler 51 toward the light receiving element 513 in the case where the photocoupler 51 is provided as the guiding position sensing means 5, The guide 3 of the pressure gauge 100 is rotated at a predetermined angle corresponding to the pressure of the gas or the fluid so that the guide position detecting means 5 can detect the position of the indicator plate Light emitted from the light emitting element 512 of the photocoupler 51 is reflected by the reflecting surface 31 formed on the back surface of the pointer 3 when the pointer 3 is positioned on the top surface of the photocoupler 51 installed at a specific position of the pointer 3, The pressure of the gas or fluid detected through the pressure gauge 100 in the microcomputer 300 connected to the photocoupler 51 is lower than the installation position of the photocoupler 51 to which the current detection signal is inputted And recognizes that the pressure corresponding to the pressure It is possible to take prescribed action.

5 (a) and 5 (b), when the variable resistor 52 is provided as the guiding position sensing means 5, the knob coupling piece 32 is integrally formed on both sides of the guide 3 The guide 3 of the pressure gauge 100 is fixed to the knob 521 of the variable resistor 52 so that the pointer 3 of the pressure gauge 100 is pressed against the gas or fluid pressure The knob 521 of the variable resistor 52 is also changed in position corresponding to the change in the rotational angle of the pointer 3 and the resistance value is changed so that the microcomputer 300 having a state of being connected to the variable resistor 52, In response to the change in the resistance value of the variable resistor 52, the pressure of the gas or fluid detected through the pressure gauge 100 can be accurately recognized in real time and the predetermined action can be taken in response to the pressure.

3 (a), when the photocoupler 51 is installed as one of the pointer position sensing means 5 on the display panel 2, the lower limit of the pressure determined by the device using the pressure gauge 100 It is possible to install the pressure-sensing integrated type pressure gauge of the present invention at any position of the pressure sensing position (photocoupler installed on the left side in the drawing) or the upper limit pressure sensing position (photocoupler installed on the right side in the drawing) When the water tank is a sealed boiler, it is installed as a lower limit pressure sensing position for a predetermined pressure, for example, at a low water level position or an upper limit pressure sensing position, for example, a maximum water level sensing position, The microcomputer 300 recognizes whether the water level in the water tank is the water level or the maximum water level, and when the water level is low, the water supplement valve or the like is operated for water replenishment, One time by blocking the drive, such as filling valve can block the further inflow of water.

When the plurality of photocouplers 51 are installed as the guiding position sensing unit 5, though not shown, the photocouplers 51 are installed one by one for each predetermined pressure unit within a range of 0.1 to 1.0 MPa The microcomputer 300 may recognize the pressure change of the gas or the fluid by a predetermined unit.

4, when the plurality of photocouplers 51 are installed in the guiding position sensing unit 5, the photocouplers 51 are installed one by one in a predetermined pressure unit as described above, a pair of the light emitting devices 512 and the light receiving elements 513 may be integrally mounted on the body 511 at predetermined intervals.

The photocoupler 51 used as the guiding position sensing means 5 may be configured such that the light emitting element 512 and the light receiving element 513 are mounted on the upper surface of the body as described above, Emitting element 512 and the light-receiving element 513 are mounted on the inner surfaces of mutually opposing grooves of the body having the shape of "┗ 와 " as in the case of this embodiment. In this case, The microcomputer 300 recognizes the rotation of the guide 3 in response to a change in the pressure of the light emitted from the photocoupler 51, 3 may be bent to form a light shielding plate or a light shielding plate may be separately provided on the backside of the guide.

When the pressure sensing integrated type pressure gauge to which the present invention is applied is applied to the boiler, the guiding position sensing means 5 of the pressure gauge 100 is operated as shown in Figs. 3 (a) and 3 (b) 3 (b) and 3 (c), the low-level sensing position, the optimum setting maximum level detection position, the first-level limit level sensing position, and the maximum Or at the limit water level sensing position.

That is, when installing the pressure-sensitive integrated type pressure gauge of the present invention in the boiler so that the water level detection and the pressure detection of the boiler can be performed at the same time, the low water level sensing position or the maximum limit pressure position can be detected (5) may be provided at each position selectively or simultaneously, and a low-level sensing position (photocoupler first installed from the left side in the drawing) may be provided and the optimum setting maximum level sensing position (Photocoupler installed second from the left side in the drawing) or the maximum limit water level detection position (photocoupler installed at the last right side in the drawing) Four guide position detecting means 5 may be provided at respective predetermined positions.

In the present invention, a wing 33 for expanding the range of the instruction detection range is further formed on both sides of the pointer 3, if necessary, and the photocoupler 51, which is respectively installed in the pointer position sensing means 5, So that the angles of the guiding directions can be enlarged.

When the wings 33 for guiding the detection range are further provided on both sides of the guide 3 as described above, the pressure of the fluid or gas through the rotation angle sensing of the guide 3 through one photocoupler 51 The range that can be detected becomes wider.

When the plurality of photocouplers 51 are installed at predetermined intervals on the display panel 2, the two photocouplers 51 adjacent to each other are simultaneously guided by the guides 3 ) Is not detected.

When the pressure sensing integrated type pressure gauge including the wing 33 for sensing range extension on both sides of the guide 3 as described above is applied to the boiler, the photocoupler for sensing the low water level is not installed, The low water level and the maximum water level can be detected even if the photocoupler is installed only at the maximum water level sensing position.

That is, the photocoupler 51 is provided at the appropriate set pressure position and the maximum limit water level sensing position determined on the display panel 2 of the pressure gauge 100, and the pointer 3 is provided with a guide- When the pressure sensing integrated type pressure gauge with the pressure sensing integrated type pressure gauge 33 is applied to the boiler, the wing 33 for extending the sensing range of the pointer 3 does not deviate from the photocoupler 51 at the proper pressure position, When the photocoupler 51 at the pressure position continuously outputs the light receiving signal, the microcomputer 300 receiving the signal can recognize that the water level in the present water tank is maintained within the predetermined set water level.

In addition, the guide detection range enlarging blade 33 integrally formed in the guide 3 due to the pressure drop in the water tank, including the photocoupler 51 at the proper set pressure position due to the deviation from the photocoupler 51, If no detection signal is output from the photocoupler 51 at the limit water level sensing position, the microcomputer 300 recognizes the water level in the present water tank as a low water level and automatically sets a water replenishment valve or the like in order to replenish water in the water tank Can be operated.

Further, the pressure increases due to the water replenishment or the like, so that the wing 33 for guiding the range of the guidance of the pointer 3 is positioned above the photocoupler 51 at the maximum limit water level sensing position, When the light receiving signal is output from the coupler 51, the microcomputer 300 recognizes that the water level in the water tank has reached the maximum limit and automatically closes the water replenishment valve or the like which is opened for water replenishment.

While the preferred embodiments of the present invention have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. Is obvious to those skilled in the art.

1: Case
2: Display panel
3: Directive 31: Reflecting surface
32: Knob coupling piece 33: Wing for widening the detection range
4: fluid or gas inlet pipe
5: instruction position detection means
51: Photo coupler 511: Body
512: light emitting element 513: light receiving element
52: variable resistor 521: knob
100: Pressure gauge
200: Fluid or gas pipe
300: micom

Claims (11)

1. A pressure gauge detachably connected to a fluid or gas pipe, the pressure gauge directing the pressure to be sensed by changing the angle of the pointer in response to a pressure change of the fluid or gas,
Pressure detection-integrated pressure gauge, characterized in that the installation of a guide position detection means for detecting the instructions as an electrical signal when the instructions in the display panel of the pressure gauge indicates a specific pressure position is provided to the microcomputer.
The method according to claim 1,
The guide position detecting means is a pressure sensing integrated pressure gauge, characterized in that it comprises a photo coupler or a variable resistor.
The method according to claim 2,
When the photo coupler is installed as the guide position detecting means,
And a reflective surface for reflecting the light emitted from the light emitting element of the photocoupler toward the light receiving element is formed on the back surface of the guide.
The method according to claim 2,
When the variable resistor is installed as the guide position detecting means,
Both sides of the guide is pressure-integrated pressure gauge, characterized in that the bending of the knob coupling piece for further changing the position of the variable resistance through the sliding in response to the change in the rotation angle of the guide.
The method according to claim 1 or 2,
When one photo coupler is installed as the pointer position detecting means on the display panel,
Wherein the pressure gauge is installed at any one of the lower limit pressure sensing position or the upper limit pressure sensing position determined by the instrument using the pressure gauge.
The method according to claim 1 or 2,
When a plurality of photocouplers are installed as the guiding position sensing means,
Wherein the photocouplers are provided for each predetermined pressure unit within a range of 0.1 to 1.0 MPa.
The method according to claim 1 or 2,
When a plurality of photocouplers are installed as the guiding position sensing means,
Wherein the light-emitting element and the light-receiving element are integrally mounted with a predetermined distance therebetween.
The method according to claim 1,
The device is a pressure-sensing integrated pressure gauge, characterized in that the water tank comprises a closed boiler.
The method according to claim 8,
When the guiding position sensing means is installed on a pressure gauge to be applied to the boiler,
Wherein the pressure-sensing integral type pressure gauge is selectively installed at any one of the low-water level sensing position and the maximum limit water level sensing position, or is installed at both positions.
The method according to claim 8,
Wherein when the pressure gauge to be applied to the boiler is provided with a plurality of guiding position sensing means, it is installed at the low level sensing position, the optimum set maximum level sensing position, the first critical level sensing position and the maximum critical level sensing position, Integrated pressure gauge.
The method according to claim 1 or 2,
Pressure sensing-integrated pressure gauge, characterized in that the two sides of the guide is further formed to form a blade for expanding the guide detection range for increasing the detection angle of the photo couplers installed as guide position detection means.

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