JPH0540699U - Automatic drain discharge device - Google Patents

Abstract

(57) [Summary] [Purpose] The control air for operating the drain discharge valve is taken out from the same compressed air circuit device system, and the drain discharge valve that can use it takes out inexpensive, high-cost equipment. To provide a reliable automatic drain discharge means. [Structure] Outside the drain drain valve, a control circuit in the control air flow introduces a control air flow pressure equal to or higher than the internal pressure of the device into the drain valve through a pilot pipe to the drain valve. In the discharge valve, and the discharge valve has a storage space for the drain from the device on one side and an air chamber for supplying a control air flow pressure on the other side, and one of the operating pistons that is vertically movable A pressure receiving plate at the end of the piston, and the other side is provided with a valve body provided on both upper and lower surfaces of the piston, and when one of the valve bodies flows in when a desired control air pressure is applied to the pressure receiving plate of the air chamber. When the drain is closed, the other opens the storage drain to the outside of the machine, and when its working pressure stops, the valve body accepts the inflow drain, and the other one closes the drain discharge port to enable the drain storage operation. Configure the structure to

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention is applied to a device in which the drain generated during the operation of the air source and the load machine interferes with the operation of the soft surface or the hard surface, in other words, the drain removing device of those "drain generators". The device has a control circuit that regulates the pressure, and the pilot air (hereinafter referred to as the control air) that has the control pressure can be easily taken out from the circuit or by simple processing applied to the circuit. The present invention relates to an automatic drain discharge means for a device that operates and operates by providing a compressed air circuit.

[0002]

[Prior Art]

 Various types of automatic drain discharge means in the present technical field have already been commercialized and are already known. The conventional technology of these means will be described below with reference to a portable air source device which is an example in which the technical fields of the present invention are integrated. Here, the following drain pool is usually also used as the air tank that stores the load-use compressed air. In the automatic drainage system, 1) a mechanical system in which a float is installed in the drain reservoir and the float reacts with a water level above a certain level to remove water, 2) the water level is detected electrically to remove water. There is an electric batch drainage method, 3) a timed drainage method that automatically drains accumulated water that accumulates irregularly at regular intervals. The mechanical method of the above 1) is the simplest mechanism and is inexpensive, but it is easy to fail due to fluctuations in internal pressure, and its maintenance is not easy because of internal transparency. Moreover, since it is installed inside the pressure vessel, repairing at the time of failure is not easy. In addition, the above-mentioned electric type has a high cost both in the collective drainage method of 2) and the timed drainage method of 3), which prevents its spread.

In the above-mentioned related art, the drain drain valve is not operated in proportion to the amount of drainage of the air circuit device and the amount of drainage generated from the drainage. It grasps the drain as a predetermined amount of accumulated water, detects the water level, and then drains it from the drainage mechanism that corresponds to the predetermined amount. Generally, a certain level of sealing water is left inside, and its draining action is performed by applying an external force by an electric signal to a drain valve to drain it. In other words, the premise of drainage technology is to ensure that a certain amount of drainage stays in the air tank and that there is residual drainage even when it is drained. Note that in the timed drainage system, the drainage operation is not performed in proportion to the drain storage amount in the air tank, so the drain accumulates inside and becomes drained, or the drain is removed too much and the tank air pressure is released during drainage operation. It is an automatic drain drainage system, which has concerns.

A more practical drain valve can be obtained if an external force that provides an inexpensive and stable operation can be used in place of the above-mentioned electric type in the automation of the operation of the drain drain valve. The following is not a prior art drain drain valve, but a similar prior art is shown in FIG. 9 of the drawings herein. This is a control valve described in Japanese Patent Publication No. 42-13684. According to the same report, the control valve 35 controls the main fluid according to the state of the main fluid, and the open state of the valve body 88 and the outside of the communicating pipe from the guide hole 34 provided in the upper part. The closing of the inflow of the fluid is simultaneously generated by interlocking with the shaft 85 that is moved up and down, and the upward and downward movement is received by the lower piston 86 of the shaft 85 through the pressure gas supply hole 33 arranged in the lower part. The valve is operated by a control gas from a circuit system to open and close the valve. The control valve 35 is for use with a pair of control valves 35 having different inflow directions, which are not described here, and is useful for the distributed transfer of two fluids in different states. It is constructed by combining so that the main fluid does not pass through the other valve when the main fluid flows through the one valve, which is the operation of the valve body for that purpose and the use of the control gas. That is, this conventional example type corresponds to one type of pneumatic control valve that uses a dedicated control pneumatic pressure.

[0005]

[Problems to be solved by the device]

 The problems to be solved are that the prior art is firstly expensive and has a problem in operation and maintenance, and secondly, it does not necessarily show high reliability in drain discharge.

An object of the present invention is to take out control air from the same compressed air circuit device that uses pressure regulation as a control means for operation, and by utilizing it, it is possible to reduce the control air without using any electric means. It is to provide a means that can automatically drain a certain amount of drain with high reliability at cost.

Further, in accordance with the above-mentioned matters, the object of the present invention is to effectively use the energy owned by the own system for circuit maintenance of the same system, and the drain that corresponds to the frequency of use of the amount of received and delivered air. The aim is to establish a system for obtaining the number of drainages, and in particular to provide a means that does not require the drainage pool to reside permanently in the air tank.

[0008]

[Means for Solving the Problems]

 The basic configuration of the automatic drain discharge device of the present invention is a compressed air circuit device having a control circuit for adjusting pressure. First, the control air is effectively taken out from the compressed air circuit for drain discharge. In the drain drain valve connected to the air tank, a space of a predetermined size for storing the drain and compressed air and a piston driven by the introduced control air are provided, and the piston drive cuts off the outside world. Then, a drain discharge valve having a mechanism for receiving a drain or the like, or shutting off the air tank to discharge the drain inside the valve to the outside is provided.

That is, according to the structure of the present invention, in claim 1, the pilot pipe 64 communicating with the control circuit 6 having the control air C, and the inside of the valve when the pressure of the control air C 2 is received through the pilot pipe 64 A drain discharge valve 8 that enables discharge of the drain D is provided in the drain generator 2. In the claim 2, the pilot pipe 64 is provided by the control circuit 6 in which the release valve 61 is provided. According to claim 4, the pilot pipe 64 is branched and disposed by the control circuit 6 in which the unloader pipe 65 is disposed. The valve 8 is provided with a drain inflow account 93 that is connected to the drain pipe 58 of the drain generator 2, and a drain outflow account 79 and a drain outflow account 7 that are paired with the drain inflow account 93 to form a drain reservoir 98. A drain drain account 94 for discharging the drain D to the outside of the machine in response to opening / closing of the drain pipe 9 is provided, and a control air inflow account 95 for receiving the control air C by piping at one end of the pilot pipe 64 and the control The pressure receiving plate 89 that can be operated by the working air C is at one end, and the piston 84 that can close one of the drain inflow account 93 and the drain drop account 79 according to the movement of the pressure receiving plate 89 is at the other end. In claim 5, the drain reservoir 98 is provided with a dirt pocket 11, and in claim 6, the drain discharge valve 8 shares the drain reservoir 98. Each is characterized in that a container adapter 10 that is configured as possible is attached.

[0010]

[Action]

 With this invention, since it is a mechanical type that is externally installed in a visible position, maintenance is easy, and since the drain discharge of the drain discharge valve is performed by the operating force obtained from the circuit in the same system, the self circuit is operating. As long as it is, it does not depend on the external force condition which is generated when the control power source is obtained from the other by easily consuming a small amount of energy. Since the drain discharge is done by a simple piston drive, the structure is simple and the cost is low. In addition, the drain discharge system only has other piping, so the running cost is very small. The drain accumulating space in the drain discharge valve or a container adapter that can expand the space is installed for long-term continuous operation of the air compressor, a large horsepower compressor that generates a large amount of air, and a drain due to high humidity in the intake air. It will respond to the increase in the amount generated. Depending on the operating method of the compressed air circuit device to which it belongs, the drain discharge phenomenon can be identified during load operation or no load operation, so that it is easy to confirm the operation of the device of the present invention.

[0011]

[Specific configuration of device]

 Hereinafter, the configuration of the present invention will be described in detail with reference to the embodiments shown in the drawings. 1 and 2 are circuit diagrams illustrating an outline of an air source device as an example of a drain generator and explaining the automatic drain discharge device of the present invention, and FIG. 1 is a pressure switch controller thereof. FIG. 2 shows an embodiment of the air source device with a structure, and FIG. 2 shows an embodiment of the air source device with an unloader control mechanism. 3 to 8 are for explaining the structure of the drain discharge valve used in the automatic drain discharge device. FIG. 3 is a sectional view of one embodiment, FIG. 4 is a view taken along the line AA of FIG. 5 is a cross-sectional view of a main part of another embodiment, FIG. 6 is a view taken in the direction of arrows BB in FIG. 5, and FIG. 7 is a main part explaining an embodiment with a container adapter in the position taken along the line AA in FIG. FIG. 8 is a plan view and FIG. 8 is an internal structural state diagram for explaining one action of drain discharge. Note that FIG. 9 is an explanatory diagram of the related art.

1 and 2 for claim 1, FIG. 1 for claim 2, FIG. 3 for claim 3, and claim 4, FIG. 3, FIG. 4, and FIG. 5 and 6 and claim 6 are correspondingly illustrated by all or part of the corresponding figures.

Hereinafter, the present invention will be described when the present invention is applied to the compressed air source device 1. The device 1 includes devices such as a driving device 3 driven by an engine or an electric motor, an air compressor 4, an air tank 20 and tanks, auxiliary devices such as valves and switches for assisting these functions, and organic devices such as these. The air source circuit 5 is a compressed air circuit, and the control circuit 6 is included in the circuit 5. The main drain generator 2 here is the air tank 20. A control circuit that uses compressed air may not be included in the compressed air circuit of the compressed air circuit device by electrically controlling the accessories. The embodiment shown in FIG. 1 is an example in which the control circuit is newly constructed.

The automatic drain discharge device 7 of the present invention comprises a drain part 8 and a pipe part branched from the control circuit 6 part of the compressed air circuit device. The drain discharge valve 8 is connected by piping so that the drain D of the drain generation device 2 can be received, and the piping portion is the same as that of the device system to which the drain discharge valve belongs, such as a portable air source device, as shown in FIG. In the illustrated embodiment with a pressure switch control mechanism, the connection pipe 53 between the release valve 61 and the air tank 20 and the connection pipe 51 between the discharge side of the air compressor 4 and the check valve 62 are arranged. The release pipe 63 is provided with a branch pipe 68, and the branch pipe 68 and the drain discharge valve 8 are communicated with each other, and the pilot pipe 64 is provided so that the drain discharge operation of the drain discharge valve 8 can be performed. Connect and configure to take out control air from the control circuit. The drain drain valve 8 is provided with a pipe for drain drainage, and a drain pan 50 or a drain groove not shown here is provided outside the machine for drainage treatment. Further, in the embodiment with an unloader control mechanism shown in FIG. 2, an unloader pipe 65 for piping between the suction unloader device 42 on the discharge side of the air compressor 4 and an unloader valve 66 for piping / connecting to the air tank 20. A branch pipe 68 is provided at the same position, and the same construction as that of the embodiment shown in FIG.

The drain discharge valve 8 of the present invention is formed by an upper body 80 and a lower body 90. Inside thereof, a drain inlet seat 93 connected to the air tank 20 through the drain pipe 58 and a drain drop account 79 forming a drain reservoir 98 by being paired with the drain inlet account 93. A drain drain account 94 is provided for discharging the drain D to the outside of the machine according to the opening / closing of the drain drop account 79. Further, a control air inflow account 95 that is piped at one end of the pilot pipe 64 to receive the control air C, and a pressure receiving plate 89 that is operable to the control air C are provided at one end of the shaft 85, and others. And a valve opening / closing mechanism having a piston 84 which is connected to the end and can close one of the drain inflow account 93 and the drain drop account 79 in accordance with the vertical movement of the pressure receiving plate 89. .. The piston 84 is movably held by the piston guide 82 on its side surface, and the pressure receiving plate 89 is attached to the lower piston 86 and sealed by the O-ring 81 so that it can move in the lower piston guide 99. ing. The lower piston guide 99 is divided into upper and lower spaces by the pressure receiving plate 89. The lower space of the lower piston guide 99 is an air chamber 78 for receiving the control air C, and the upper space of the lower piston guide 99 is located in the middle of the drain reservoir 98. Then, a drain passage for discharging drain from the drain drainage account 94 to the outside of the machine is formed. A valve body 87 is provided on the upper surface of the piston 84 so that the valve seat 91 inside the drain inflow account 93 can be closed when the drain acceptance is stopped, and a valve body 88 is provided on the lower surface of the piston 84 when the drain stays. The valve seat 91 installed upward in the drain drop account 79 can be closed. The drain drop account 79 passes through the shaft 85 and, when the drain drop account 79 is closed, forms an upper space defined by the outer plate of the upper skeleton 80 and the piston guide 82 in the drain reservoir. The piston guide 82 is provided with piston guide openings 83 on the left and right sides and formed in facing arc-shaped walls so that the piston 84 can be held upright.

As another embodiment of the drain drain valve 8 of the present invention, a dart pocket 11 having a C-shaped cross section is formed in the lower body 90 in a concave shape, and the dart pocket 11 of the drain reservoir 98 of the upper body 80 is formed. The bottom surface that abuts the top surface is opened to provide a place for collecting dust or mud that flows in together with the drain D.

As another embodiment of the drain drain valve 8 of the present invention, as shown in FIG. 10, an outer wall of the drain drain valve 8 is provided with an opening 9 A of a required size in a main part of the outer wall 9. It is provided with a dart pocket or drain reservoir 11 which can communicate with the opening 9A and guide the inflow drain, and as a result can additionally increase the drain reservoir function of the drain drain valve 8 and the operation. A container adapter 10 having a pressure resistance against the internal load pressure at that time and which can be mounted on the drain drain valve 8 in a sealed manner is configured. The container adapter 10 is integrally configured by attaching a bolt or a flange to the flange, or attaching and detaching a hook metal fitting or a detachable fastener using a hatch-type tightening bolt. Although the container adapter 10 shown in the drawing has a rectangular outer shape, it may be formed in a circular shape, or may be formed in a donut shape that covers the entire drain drain valve 8.

[0018]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. As described above, in the embodiment of the air source device with the pressure switch control mechanism, the control method is to detect the pressure in the air tank by the pressure switch without using the control air C, and to electrically control the control value. This is a method of feeding back to the air source device. Therefore, the control result appears in the load side air flow on the discharge side of the air compressor 4, so that a release pipe 63 that connects the discharge side pipe 51 and the pipe 53 part of the release valve 61 is newly provided, and from there, the drain discharge valve 8 is provided. The control air flow C to be supplied to is taken out. By newly installing the control circuit 6 so that the control air flow C can be used, the internal pressure of the air tank 20 is reduced, and when the compressed air is replenished, the air compressor 4 is operated at the same time. The internal pressure of the drain drain valve 8 which is maintained at substantially the same pressure as in the tank 20 receives the control air C from the release pipe 63 in the drain drain valve 8 and is larger than the seat diameter. Therefore, the piston is pushed up by the difference in the diameter and the drainage process is started. In the embodiment of the air source device with the unloader control mechanism, the unloader pipe 65 is a flow path for compressed air and is used for its control function, so the unloader pipe 65 is used as the control circuit 6. The control air C supplied from the control circuit 6 to the drain drain valve 8 is supplied when the air source device is in the unloaded state. After the supply is started, the drain drainage process of the drain drainage valve 8, which is the same as that obtained in the pressure switch system, is started.

The drain drain valve 8 of the present invention is manufactured by selecting its material and processing method so that its body structure is made of iron or Al, FRP resin, or the like, and the internal pressure resistance condition is selected. The upper and lower valve bodies 87, 88 of the piston 84 are preferably those having a large wear resistance on the surface and having an elastic force in order to improve the seat diameter. The size of the valve bodies is selected to be large enough to cover at least the corresponding valve seats. The size of the pressure receiving plate 89, which is the main element for moving the piston 84 up and down, is selected in accordance with the control pressure of the air tank 20 to be installed and the total resistance exerted by the entire piston mechanism during its operation. The illustrated drainage seat 8 of the drain drain valve 8 is of a threaded type, but may be connected by a one-touch type of open technology (not shown here), which is a practical connection technology capable of obtaining a sealed state. In the embodiment, the control air inflow account 95 is shown on the side surface, but it may be arranged on the bottom surface of the lower skeleton 90 which is directly below the pressure receiving plate 89.

When the control air flow C is not supplied to the drain drain valve 8, the internal pressure of the air tank 20 for accumulating the compressed air from the drain inflow account 93 is received inside the drain drain valve 8 and, as a result, The upper valve body 87 of the piston 84 that has been pushed up in the previous state is pushed down, and a space is created between the upper valve body 87 of the piston 84 and the valve seat 91 in the drain inflow account 93, and the lower valve body 88 of the piston 84 drops the drain. It sits on the valve body 92 of the account 79 and closes the space between the upper body 80 and the lower body 90. From the separated space, the drain D in the air tank 20 moves to the drain reservoir 98 in the drain drain valve 8 and fills the internal volume of the drain reservoir 98, or the drain D in the air tank 20. Drain D is stored until it disappears. Due to the causes detailed in section 0018, a control air flow C sufficient to actuate the piston 84 of the drain drain valve 8 upward is supplied to the control air inflow account 95. The control air flow F pushes up the pressure receiving plate 89 in the air chamber 78, ends the state in which the lower valve body 88 of the piston 84 is seated on the valve seat 92, starts to separate them from each other, and the upper and lower body parts are separated from each other. The upper pressure plate 87 contacts the valve seat 91 in the drain inflow account 93 while opening the space blockage, and closes the communication state with the air tank 20 until the pressure receiving plate 89 faces upward. Keep moving. While the action of the control air C continues, the upper valve body 87 and the valve seat 91 are kept in a sealed state. As a result, the drain D stored in the drain reservoir 98 flows out from the drain drop account 79 opened to the lower space while the drain drain valve 8 and the air tank 20 continue to be isolated. , Drain drainage The drain moving flow R is generated toward the account 94, and the drainage drain process is performed. Even if the drain drain valve 8 ends and there is no drain that can be drained in the drain drain valve 8, the pressure receiving diameter is larger than the seat diameter. The position is retained.

When the compressed air is stored in the air tank 20, fine dust mixed together, the lubricating oil in the pipe settled in the tank 20, and the fine dust and oil are mixed and grown. A relatively viscous, precipitating dust, such as produced dust, is produced. These burrs generally adhere to a valve body such as a valve or a valve seat and hinder the airtightness. The drain drain valve 8 having the dirt pocket 11 traps this kind of sedimentary blocker in the dirt pocket 11 to open and close all the valve bodies and valve seats that are the opening and closing elements of the drain drain valve 8. Protects the contact surface and the part that interferes with the vertical sliding operation. As a function of the container adapter, the drain drain valve 8 whose capacity is increased by the container adapter 10 is used for a long-time compression operation of the compressor, in the case of a compressor with a large amount of air and high horsepower, or the humidity of the intake air of the compressor. Even if a large amount of drain is generated due to a large amount of water, it can be stored in the drain drain valve.

In the description of the embodiment of the present invention, the compressed air source device 1 is mainly used, but another drain generator 2 having a similar problem, for example, a work device of some kind having a pneumatic application circuit is provided. The automatic drain discharge device 7 can be applied to provide an inexpensive and useful embodiment.

[0023]

[Effect of the device]

 The drain drain valve used in the automatic drain discharge device of the present invention has a container and volume set to the optimum conditions, and discharges only the drain and compressed air accumulated in this fixed volume when the control air is introduced. With this configuration, the waste of compressed air can be minimized, and for a pressure system considered to generate a large amount of drainage, the capacity of the container adapter must be increased accordingly. Can be dealt with. In addition, since the pressure receiving air chamber is small, the moving distance of the drive part is short, and the structure is simple, the mechanical cost is low, and the initial cost and running cost are low, and high reliability, good maintainability, and container adapter are added. It exhibits good flexibility and effects on load fluctuations. Since the automatic drain discharger of the present invention operates its operating principle in the closed circuit of energy, it ensures the highest independence in its operation, its operation is stable, and the operation of the control system of the same system is stable. Since it is a system that operates in conjunction with movement, the drain discharge using the drain drain valve described above is maintained while maintaining a close relationship between the newly generated drain amount that causes the supply air amount and the drain during the supply air operation. Since the operation is performed and there is a rational effect, there is no waste in automatic drain discharge, and resource saving is achieved.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of an air source device with a pressure switch control mechanism of an automatic drain discharge device.

FIG. 2 is a circuit diagram showing an embodiment of an air source device with an unloader control mechanism of the automatic drain discharge device.

FIG. 3 is a cross-sectional view showing the internal structure of a drain discharge valve used in an automatic drain discharge device.

FIG. 4 is a view taken along the line AA of FIG. 3 showing a main part of the drain discharge valve.

FIG. 5 is an explanatory view of another embodiment showing a lower main part of the drain discharge valve.

FIG. 6 is a BB arrow view of FIG. 5 showing another embodiment of the drain discharge valve.

FIG. 7 shows an example of a container adapter of a drain discharge valve,
It is a principal part top view demonstrated in the AA arrow line of FIG.

FIG. 8 is a one-state diagram illustrating the operation of the drain discharge valve.

FIG. 9 is an explanatory diagram of prior art.

FIG. 10 shows an internal structure of a drain discharge valve according to another embodiment of the present invention, in which the left half shows the drain discharge state and the right half shows the inflow state.

[Explanation of symbols]

 1 Compressed Air Source Device 2 Drain Generator 20 Air Tank 3 Drive Device 4 Air Compressor 5 Air Source Circuit 6 Control Circuit 7 Drain Discharge Device 8 Drain Discharge Valve 82 Piston Guide 84 Piston 10 Container Adapter

Claims (6)

[Scope of utility model registration request] 1. An automatic drain discharge device for use in a compressed air source or load machine having a control circuit for adjusting pressure, and a pilot pipe 64 communicating with the control circuit 6 having control air C, and the pilot pipe 64. An automatic drain discharge device, wherein a drain discharge valve 8 that enables discharge of the drain D inside the valve when the pressure of the control air C is received via the drain generator 2. 2. The automatic drain discharge device according to claim 1, wherein the pilot pipe 64 is provided so as to be branched from the control circuit 6 in which the release valve 61 is provided. 3. The automatic drain discharge device according to claim 1, wherein the pilot pipe 64 is arranged so as to be branched from the control circuit 6 in which the unloader pipe 65 is arranged. 4. A drain inflow account 9 in which the drain discharge valve 8 of claim 1 is connected to a drain pipe 58 of the drain generator 2.
3, the drain inflow account 93 is provided in a pair with the drain reservoir 9
The drain drop account 79 forming 8 and the drain drain account 94 for draining the drain D to the outside of the machine according to the opening and closing of the drain drop account 79 are arranged, and the drain drop account 94 is connected to one end of the pilot pipe 64 for the control. With the control air inflow account 95 that receives the air C and the pressure receiving plate 89 that is operable to the control air C as one end, the drain inflow account 93 and the drain drop account 79 are connected according to the movement of the pressure receiving plate 89. An automatic drain discharge device comprising a mechanism having a piston 84 at the other end capable of closing one of them. 5. The automatic drain discharge device according to claim 4, wherein the drain reservoir 98 is provided with a dirt pocket 11. 6. An automatic drain discharge device in which the drain discharge valve 8 according to claim 4 is provided with a container adapter 10 that can share the drain reservoir 98.