JPS599114Y2 - automatic drain discharge device - Google Patents

Description

[Detailed description of the invention] The present invention utilizes compressed air in a compressed air reservoir to automatically discharge the condensate accumulated in the reservoir.7. , 1. An automatic drain discharge device that automatically discharges condensate from the air reservoir of a compressor is operated by a timer, solenoid valve, or float that requires a power source, or by interlocking with a pressure control device such as a compressor. has been widely adopted.

However, although devices that use a timer or solenoid valve can remove drain smoothly and reliably to some extent, they require a separate power source and are not cheap.

In the case of a float, it is not particularly expensive, but drain adheres to the float and it lacks responsiveness.

Furthermore, even when connected to a pressure control device such as a compressor, the response time changes depending on changes in the pressure of the air reservoir.All of the above methods have advantages and disadvantages, and it is possible to drain smoothly and reliably at low cost. It could not be excluded.

The present invention was devised in view of the above, and its purpose is to provide a drain discharge device with a valve mechanism operated by compressed air and to utilize the compressed air in the air reservoir at a low cost. An object of the present invention is to provide an automatic drain discharge device capable of automatically and smoothly and reliably discharging drain.

Another object of the present invention is to provide an automatic drain discharge device that operates more reliably and can remove drain smoothly and accurately by equipping the valve mechanism operated by compressed air with means for improving its operation. It is.

That is, in the present invention, an auxiliary tank is disposed in a main body of a drain discharging device having a drain inlet and a drain outlet, and a small diameter portion serving as a drain channel is provided in a part of the device main body that opens and closes the drain channel. A compression spring is installed inside the auxiliary tank to allow the piston valve to slide and seat the piston valve at the outlet of the auxiliary tank to close the port, and the auxiliary tank is provided with an upper part of the air reservoir through a first orifice. , the lower part of the air reservoir is connected to the drain inlet via a drain outlet pipe, and
The main body of the device is equipped with a second orifice equipped with a low pressure stop valve, and only when the head inside the main body of the device is under low pressure, the low pressure stop valve stops the release to the atmosphere, and when the pressure becomes high, the piston In addition to moving the valve to a position where the drain flow path can be opened, when the drain flow path is opened, the amount of air released from the second orifice via the low pressure stop valve is greater than the amount of compressed air that flows into the auxiliary tank from the first orifice. The present invention provides an automatic drain discharge device characterized in that the piston valve is operated by increasing the size of the piston valve.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is the main body of the drain discharging device, 2 is an auxiliary tank connected to the main body 1 of the drain discharging device, and 3 is an air reservoir such as a compressed air tank or pressure air piping. The air reservoir 3 and the auxiliary tank 2 are connected by a drain outlet pipe 4 led from the lower part of the air reservoir 3, and the air inlet pipe 5 led from the other upper part of the air reservoir 3. There is.

The drain discharge device main body 1 has a drain flow port 6 on one side and a drain outlet 7 at a predetermined interval on the other side, and the drain outlet pipe 4 is connected to the drain flow port 6.

Reference numeral 8 denotes a piston valve for opening and closing a drain flow path that is slidably installed inside the main body 1 of the device, and has a small diameter portion 9 in the center that serves as a drain flow path, and the small diameter portion 9 changes depending on the valve movement position. Drain flow port 6 and drain outlet 7 in the drain flow path of
It is designed to open or close.

On the base side of the piston valve 8, a compression spring 12 is connected to the inner wall of the device main body 1 to close the elastic sheath 10 at the tip of the piston valve 8 to the auxiliary tank outlet 11 and close the air introduction path. It is interposed between the valve groove 13 and the inner wall thereof.

In addition, on the outer surface of the piston valve 8 that comes into contact with the device main body 1,
O-rings 14, 14 are interposed to maintain airtightness between the device main body 1 and the piston valve 8 and to ensure opening and closing of the drain passage.

15 is a first orifice provided in the middle of the air introduction pipe 5; 16 is a second orifice provided near the head of the device body 1; the second orifice 16 has a valve plate 18 on the valve body 17; A small pressure stop valve 20 consisting of a small compression spring 19 and a small compression spring 19 is attached.
When the pressure is high, the amount of air released from the second orifice 16 is supplemented from the first orifice 15. The amount is made larger than the amount flowing into tank 2.

The compressed air in the air reservoir 3 is introduced into the auxiliary tank 2 through the first orifice 15, and the compressed air pushes the piston valve 8 against the compression spring 12, thereby opening the outlet 11 of the auxiliary tank 2. Separated from the seat and further pressed, the drain passage of the small diameter portion 9 communicates the drain flow port 6 with the drain outlet 7 to open the drain passage, while the compressed air flowing into the auxiliary tank 2 from the first orifice 15 is By making the amount of compressed air released from the second orifice 16 larger than the amount of compressed air released from the second orifice 16, after an appropriate period of time, the return force of the compression spring 12 closes the drain passage and drains the drain in the air reservoir 3 into the drain introduction pipe. It is designed to be periodically discharged to the outside through 4.

Next, the operation will be explained in detail based on the above structure.

The air reservoir 3 is passed through the first orifice 15 into the auxiliary tank 2.
A small amount of compressed air is introduced into the tank to gradually increase the internal pressure of the tank.

When the internal pressure of the auxiliary tank 2 reaches a constant pressure P1, the piston valve 8 in the device main body 1 is pushed against the compression spring 12 set to operate, and is unseated from its outlet 11.

At this time, the pressure of the compressed air pushed out from the outlet diameter d1 of the auxiliary tank outlet 11 is received by the piston diameter d2 of the piston valve 8, so the force for operating the piston valve 8 is PIX-z
(di)2 is amplified to P1X (d2)2 (d〈
d2), the piston valve 8 is moved against the spring 12 into the device main body 1.
However, in the initial stage, the internal pressure of the auxiliary tank 2 becomes close to the P1 pressure and is almost balanced with the compression spring 12 that seats the piston 8, and a small amount of air leaks from the auxiliary tank outlet 11. When this occurs, the slight pressure caused by this leaked air is transmitted to the second orifice 16 through the minute gap between the piston valve 8 and the inner wall of the device body 1, but the slight pressure stop provided in the second orifice 16 Due to the action of the valve plate 18 and compression spring 19 of the valve 20, the atmosphere is not released from the second orifice 16, and when the pressure inside the device main body 1 increases and becomes high, the accumulated pressure is used to push the piston valve 8. Make sure to move it to the inner wall stopper position.

As the piston valve 8 moves, the small diameter portion 9 of the piston valve 8 communicates the drain inlet 6 and the outlet 7, and the drain in the air reservoir 3 is discharged to the outside through the drain outlet pipe 4.

The low pressure stop valve 20 is operated by the second orifice 16 up to the low pressure P3 pressure.
However, if the pressure exceeds that level, it will be released to the atmosphere.

Since the second orifice 16 that is discharged into the atmosphere is larger than the first orifice 15, the compressed air inside the device body 1 is then transferred from the second orifice 16 to the low pressure stop valve 20.
The pressure inside the head and auxiliary tank 2 in the device body 1 decreases, and the piston valve 8 is returned to its original position by the return force of the compression spring 12, and at the same time, the drain flow path is opened. It is closed and drainage is stopped.

The piston diameter d2 of the piston valve 8 is set so that when the internal pressure of the auxiliary tank 2 drops to P2 (P1>P2), the piston valve 8 seats at the auxiliary tank outlet 11, and the internal pressure of the auxiliary tank 2 drops to P2. When the piston valve 8 is lowered to this point, the compression spring 12 acts to move the piston valve 8 in the opposite direction and seat it, and drain discharge is stopped after a predetermined period of time has elapsed.

It should be noted that the pressures of P1, P2, and P3 can be set in any way, but it is preferable that, for example, PI>P2 (5PI)>P3 (angle P2).

By repeating these operations, the condensate accumulated in the air reservoir is constantly removed and purified compressed air is obtained.

As described above, according to the present invention, since the main body of the drain discharge device is equipped with a valve mechanism operated by compressed air to discharge the drain, the compressed air in the air reservoir can be effectively used, and automatic draining can be performed using a timer or solenoid valve. There is no need to provide a separate power source like a discharge device, and the drain can be eliminated at low cost.

In addition, the valve opens when the pressure in the auxiliary tank exceeds a certain level, and closes when the pressure falls below a certain level, so drain can be automatically and smoothly and periodically reliably removed. be.

As in the present invention, the second orifice is equipped with a low-pressure stop valve to improve the operation of the valve mechanism that removes condensate, so it can operate more reliably and eliminate condensate accurately and reliably. .

The present invention has a very simple structure and satisfactorily achieves the intended purpose, making it an extremely significant contribution to industry.

[Brief explanation of the drawing]

The drawing is a schematic diagram of an embodiment of the present invention. 1... Drain discharge device body, 2... Auxiliary tank, 3... Air reservoir, 4... Drain outlet pipe, 5... Air introduction pipe, 6...
Drain inlet, 7... Drain outlet, 8...
...Piston valve, 9...Small diameter part, 11...
... Auxiliary tank outlet, 12 ... Compression spring, 1
5...First orifice, 16...Second orifice, 20...Low pressure stop valve.

Claims (1)

[Scope of utility model registration request] An auxiliary tank is disposed in a drain discharge device main body having a drain inlet and a drain outlet, and a piston valve having a small diameter portion that becomes a drain flow path is slid in a part of the device main body that opens and closes the drain flow path. and a compression spring for seating the piston valve at the outlet of the auxiliary tank and closing the port; The lower portions of the air reservoirs are connected to each other through drain outlet pipes, and the device body is provided with a second orifice equipped with a low pressure stop valve, so that the low pressure is stopped only when the head inside the device body is under low pressure. The pressure stop valve stops the release to the atmosphere, and when the pressure becomes high, the piston valve is moved to a position where the drain flow path can be opened, and when the drain flow path is opened, the compressed air flowing into the auxiliary tank from the first orifice An automatic drain discharge device characterized in that the piston valve is actuated by increasing the amount of air discharged from the second orifice through the low pressure stop valve.