JPH04366091A - Draining device - Google Patents

Abstract

PURPOSE:To provide a draining device which does not use movable parts and can surely discharge drain at the atmospheric pressure or vacuum pressure. CONSTITUTION:A water separating means 16 for separating water from in-flow air is provided at a draining device 2. and separated water is forcedly discharged by a ejector 17 for ejection. By this, as there is no movable parts, reliability in operation is improved and drain can be surely ejected.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain discharge device that separates and discharges drain from pneumatic equipment, vacuum pressure equipment, or piping of these equipment from air.

0002

[Prior Art] Conventionally, as a drain discharge device, there have been a float type discharge device that opens and closes a discharge valve using a float that moves as the water level in a drain container rises and falls, and a float type discharge device that uses the rotation of an electric motor. 2. Description of the Related Art A motor-type discharge device is known that intermittently opens and closes a flow path between a drain container and its discharge port. However, since all of these known drain discharge devices discharge drain using the differential pressure between air pressure and atmospheric pressure, when the air pressure becomes atmospheric pressure, drain discharge becomes insufficient, and even more so when using vacuum pressure. has the problem of not being able to drain the drain. Furthermore, if the discharge valve is operated directly by the buoyancy of the float, a large float is required, which increases the size of the entire device.If the movement of the float is expanded by levers, etc., the movement of the levers and other moving parts will be There is a problem that it is easy to break down due to the adhesion of drain. Furthermore, the motor-type discharge device also has the problem that condensate adheres to parts that open and close intermittently, making it susceptible to breakdowns.

0003

[Problems to be Solved by the Invention] The problem to be solved by the present invention is that condensate can be reliably discharged without using moving parts such as floats, and even if the air pressure is atmospheric pressure or vacuum pressure. An object of the present invention is to provide a drain discharge device.

0004

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a drain discharge device for discharging condensate from pneumatic equipment, vacuum pressure equipment, or piping of these devices, wherein the drain discharge device It is characterized by comprising a water separation means for separating moisture from the air flowing into the device, and a drain discharge means for forcibly discharging the separated moisture. Also, in order to solve similar problems,
The drain discharge means may be an ejector that sucks and discharges the drain. Furthermore, in order to solve similar problems,
Preferably, the drain discharge device includes a drain storage container, and the drain discharge means is an ejector that operates intermittently.

[0005]

[Operation] The air that has flowed into the drain discharge device is separated from moisture as drain by the water separation means, the air from which the moisture has been separated is discharged outside the device, and the drain separated from the air is forcibly removed by the drain discharge means. is discharged. Therefore, even if the air pressure in the storage container is atmospheric pressure or vacuum pressure, the drain can be reliably discharged. In addition, since the drain discharge means is an ejector that sucks and discharges the drain, there are no moving parts in the drain discharge means, so there is no malfunction due to the condensate adhering to the movable parts.
It can also be operated intermittently.

[0006]

[Embodiment] Figures 1 to 4 show a first embodiment of the present invention in which a drain discharge device 2 is incorporated into a suction conveyance device 1. It is configured to attract and transport.

The drain discharge device 2 has an air inlet 1
1 and an outlet 12, a water separation means 16 provided in the suction channel 15 between the inlet 11 and the outlet 12, and a discharge ejector as a forced discharge means for forcibly discharging the drain from the container 13. It is equipped with 17.

The suction conveyance device 1 has a compressed air supply port 20.
, a supply channel 22 that communicates the supply port 20 with the pressure side of the vacuum ejector 21, a switching valve 23 that disconnects the supply channel 22, a pilot solenoid valve 24 that operates this switching valve, and a switching valve. 23, the vacuum pressure ejector 21 has a branch passage 22a that branches downstream and communicates with the pressure side of the ejector 17, the suction side of the vacuum ejector 21 communicates with the outlet 12, and the discharge side opens to the outside. Further, the suction side of the discharge ejector 17 communicates with a drain passage 28 having one end opened at the bottom of the container 13, and the discharge side opens into a drain port 29. A variable aperture 30 is provided.

The pilot solenoid valve 24 supplies the compressed air supplied from the supply port 20 to the pilot chamber 23a of the switching valve 23 by energizing the solenoid 24a, and supplies the air in the pilot chamber 23a by de-energizing the solenoid 24a. The switching valve 23 is configured as a well-known three-port electromagnetic valve for discharging the air to the outside, and is configured to connect the supply flow path 22 by supplying and discharging compressed air to the pilot chamber 23a.

[0010] The water separation means 16 is constituted by a water-blocking filter element that has air permeability and prevents water from passing through. However, the water separation means may be a water-blocking filter element and the cyclone 36 upstream thereof (see FIGS. 3 and 4), or only the cyclone 36.

A vacuum switch 8 is attached to the drain discharge device 2 . The vacuum switch 8 includes a pressure passage 33 communicating with the suction passage 15, a pressure sensor 34 to which the vacuum pressure of the pressure passage 33 acts, and a demister 35 made of a water-blocking filter element in the pressure passage 33. The pressure sensor 34 is preferably composed of a semiconductor sensor, and uses a microcomputer or one-chip microcomputer for the substrate and flexible substrate, and uses the output signal of the electronic pressure sensor to perform pressure setting, adjustment, alarm, and ON-
It is possible to control the operation of the vacuum pressure circuit or the pneumatic circuit as having functions such as OFF control, hysteresis, mode switching, failure prediction function of status monitor, etc. In addition, using ambiguity theory (particularly fuzzy theory), predictive control of the adsorption state can be performed including the operation of the vacuum pressure circuit or the vacuum pressure circuit, and color liquid crystal, color LE
D may also provide a color graphic display for these functions.

Reference numeral 37 in the figure indicates the vacuum pressure ejector 21.
and a silencer provided on the discharge side of the pilot solenoid valve 24; 38 indicates one-touch pipe joints provided at the suction port 11, supply port 20, and drain port 29; It is connected to the joint 38.

Next, referring to FIG. 2, the operation of the suction conveyance device 1 incorporating the drain discharge device 2 will be described. With compressed air supplied to the supply port 20, the pilot solenoid valve 24
When the solenoid 24a is energized, the switching valve 23 connects the supply flow path 22 and compressed air is supplied to the vacuum pressure ejector 21, so that vacuum pressure is applied to the suction pad 4 via the suction flow path 15 and the tube 6. Then, the suction pad 4 suctions the workpiece 5. By adsorption of the workpiece 5 by the suction pad 4, water droplets and the like adhering to the workpiece are sucked together with air into the suction channel 15, but this moisture is separated by the water separation means 16 and flows into the container 13. Therefore, the switching valve 23, the silencer 37, etc. can be protected from moisture, and the vacuum switch 8 is also protected by the demister 35.

Furthermore, compressed air is also supplied to the discharge ejector 17 through communication with the supply passage 22, so that the drain that has flowed into the container 13 is forcibly discharged from the drain passage 28 by the discharge ejector 17. The flow rate can be adjusted by variable throttle 30. In this case, container 1
Although the vacuum pressure from the vacuum ejector 21 is applied to the container 3, since the drain is forcibly discharged by the discharge ejector 17, there is no problem in drain discharge. Furthermore, even after the drainage is finished, the ejectors 17 and 21 have substantially the same vacuum pressure generation capacity, so the vacuum pressure inside the container 13 will not drop and the workpiece 5 will not fall off the suction pad 4.

When the solenoid 24a is de-energized, the switching valve 23 shuts off the supply flow path 22 and the ejectors 17 and 21
Since the supply of compressed air to the vacuum pressure ejector 21 is stopped, drain discharge is completed and the suction pad 4 is moved to the vacuum pressure ejector 21.
The workpiece 5 is released by air flowing in from the discharge side.

FIGS. 5 and 6 show a second embodiment of the present invention, and a drain discharge device 41 of the second embodiment has a discharge passage 4 that communicates the supply port 20 with the pressure side of the discharge ejector 17.
2, a discharge switching valve 43 that cuts off the flow path 42, and a check valve 46 in the drain flow path 45. The check valve 46 is configured to block the supply flow path 42 and allow the discharge flow path 42 to communicate when the supply flow path 22 is blocked, and the check valve 46 only allows flow from the container 13 to the discharge ejector 17. It is configured as. Therefore, in the second embodiment, the vacuum ejector 21 is actuated by the excitation of the solenoid 24a of the pilot solenoid valve 24, and vacuum pressure acts on the suction pad 4. When the solenoid 24a is de-energized, the ejection ejector 17 is activated. When activated, the drain from the container 13 is discharged. Since the other configurations and operations of the second embodiment are the same as those of the first embodiment, the same reference numerals are given to the main parts in the figures, and detailed explanations will be omitted.

FIGS. 7 and 8 show a third embodiment of the present invention, and a drain discharge device 51 of the third embodiment has a discharge channel 52.
On the downstream side of the discharge switching valve 53, check valves 54 and 55 that allow flow only to the discharge ejector 17 are installed in series, and a variable throttle 5 is installed between these check valves.
A vacuum breaking channel 56 having a diameter of 7 and communicating with the suction channel 15 is provided. Further, a discharge valve 59 is installed in the drain passage 58 to open the drain passage when the discharge ejector 17 is operated. In the third embodiment, the discharge switching valve 53
When the discharge flow path 52 is opened, the discharge valve 59 is opened by the operation of the discharge ejector 17 to discharge the drain, and compressed air for releasing the workpiece is supplied from the vacuum break flow path 56 to the suction pad 4. Ru. Since the other configurations and operations of the third embodiment are the same as those of the second embodiment, the same reference numerals are given to the main parts in the figures, and detailed explanations are omitted.

FIGS. 9 to 11 show a fourth embodiment of the present invention, and a drain discharge device 61 of the fourth embodiment has a drain flow path 62 that is operated by a solenoid operated discharge switch that passes through the flow path 62. A check valve 5 in the discharge flow path 62 is provided with a valve 63.
5 and the discharge ejector 17, there is a second discharge passage 64 that communicates the supply passage 22 and the discharge passage 62, and the flow passage 64 has a second discharge passage 64 that allows only the flow from the passage 22 to the discharge passage 62. A check valve 65 is provided to allow this. The fourth embodiment is as follows:
When the solenoid 24a is energized, the vacuum pressure ejector 21
operates, and the discharge ejector 17 is also operated by the second discharge passage 64, and when the solenoid 24a is deenergized and the solenoid 63a of the discharge switching valve 63 is energized, the discharge passage 62 and the vacuum breaking passage are 56, the discharge ejector 17 continues to operate, and the suction pad 4 is supplied with compressed air for releasing the workpiece, but the second discharge passage 64 is closed by the check valve 65. Therefore, the vacuum ejector 21 does not operate (see FIG. 10). Other configurations and effects of the fourth embodiment are as follows:
Since this embodiment is the same as the third embodiment except that the drain flow path 58 does not include the discharge valve 59, the same reference numerals are given to the main parts in the figure, and detailed description thereof will be omitted.

It should be noted that the drain discharge devices of the above embodiments are all incorporated into suction conveyance devices that utilize vacuum pressure.
The drain discharge device of the present invention is not limited to equipment that uses vacuum pressure, but can also be used to discharge drain from pneumatic equipment such as pneumatic cylinders and valves, and piping connected to these equipment. . Further, the drain discharge means is not limited to the ejector.

[0020]

[Effects of the Invention] The drain discharge device of the present invention can reliably capture moisture in the air as drain by the water separation means, and the captured drain is forcibly discharged by the drain discharge means, so that it has no effect on the container. Drain can be reliably discharged regardless of the air pressure. Furthermore, since no movable parts such as floats are used, there are fewer failures, the reliability of the device is improved, and the device can be made smaller.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a first embodiment.

FIG. 2 is a circuit diagram.

FIG. 3 is a modification of the water separation means.

FIG. 4 is a back view in the AA direction of FIG. 3;

FIG. 5 is a longitudinal sectional view of the second embodiment.

FIG. 6 is a circuit diagram.

FIG. 7 is a longitudinal sectional view of the third embodiment.

FIG. 8 is a circuit diagram.

FIG. 9 is a longitudinal sectional view of the fourth embodiment.

FIG. 10 is a longitudinal cross-sectional view during operation.

FIG. 11 is a circuit diagram.

[Explanation of symbols]

2, 41, 51, 61 Drain discharge device 13
Container 16 Water separation means 17 Discharge ejector

Claims (3)

[Claims] 1. A drain discharge device for discharging condensate from pneumatic equipment, vacuum pressure equipment, or piping of these devices, wherein the drain discharge device includes water separation means for separating moisture from air flowing into the device; A drain discharge device comprising a drain discharge means for forcibly discharging separated water. 2. Claim 1, wherein the drain discharge means is an ejector that sucks and discharges the drain.
Drain discharge device described in . 3. The drain discharge device according to claim 2, wherein the drain discharge device includes a drain storage container, and the drain discharge means is an ejector that operates intermittently.