JPH07103396A - Drain discharge device - Google Patents

Abstract

PURPOSE:To provide a drain discharge device which operates surely for a long period of time even if a drain contains solid contents and muddy foreign matter. CONSTITUTION:A tube cartridge 4 which is mounted detachably on a drain discharge port 2 of a bowl 1 consists of a hollow body 5 having a pilot chamber 14 and a tube 6 made of a soft material. Both ends of the tube 6 whose outer peripheral face is sealed liquid-tightly by O rings 15, 15 are slidably inserted into grooves 13, 13 of the body, and pressing pressure on a wall face of the tube is released by discharging a pilot fluid in the pilot chamber to discharge a drain stored in the bowl 1. As a consequence, a drain discharge device operates surely for a long period of time because the drain flows in the tube and lubricant applied on the O ring 15 does not flow out due to the drain.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage device for draining fluid pressure equipment and fluid piping, and more particularly, it is suitable for draining drainage containing foreign matter such as solids and mud. The present invention relates to a drain discharge device.

[0002]

2. Description of the Related Art A known drain discharge device uses a valve having a sliding portion whose outer peripheral surface is sealed with an O-ring or a Y-type packing or a poppet type valve in order to open and close the drain outlet. However, for a valve whose sliding portion is sealed with an O-ring or a Y-type packing, it is necessary to apply a lubricant such as grease to these seal materials. However, the lubricant applied to the seal material may be drained or foreign matter in the drain. Since it is washed away, the resistance of the sliding part increases or sticks when it is used for a long time and the operation becomes unstable, and there is a problem that the operation cannot be performed at extreme times. On the other hand, in the poppet type valve, if the above-mentioned foreign matter adheres to the seal portion, the seal may be defective and the drain may leak.

[0003]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to provide a drain discharge device that operates reliably for a long period of time even if the drain contains foreign matter such as solids and mud. .

[0004]

In order to solve the above-mentioned problems, a drain discharge device of the present invention is a drain discharge device attached to a drain discharge port of a drain reservoir, wherein one end of the drain discharge device is the above-mentioned. A hollow body that can be attached to the drain outlet and has a drain outlet at the other end, and is formed of a soft material, and the outer peripheral surfaces of both ends are liquid-tight in the hollow portion of the body,
And a tube having one end or both ends slidably mounted in the hollow portion, and a pilot chamber between the hollow portion of the body and the outer wall of the tube, and the outer wall of the tube by supplying / discharging the pressurized fluid to / from the pilot chamber. Is pressed and restored to disconnect the communication between both ends of the tube. Further, in order to solve the same problem, a drain discharge device attached to a drain discharge port of a drain reservoir, wherein the drain discharge device has one end attachable to the drain discharge port and a drain outlet at the other end. A hollow body, a tube formed of a soft material, the outer peripheral surfaces of both ends of which are liquid-tightly mounted in the hollow portion of the body, and one or both ends of which are slidably mounted in the hollow portion; And a pressing mechanism for the tube which is operated by the above, and by supplying and discharging the pressure fluid to and from the pressing mechanism, the outer wall of the tube is pressed and restored to disconnect the communication between both ends of the tube.

[0005]

When the pressure fluid is supplied to or discharged from the pilot chamber or the pressure mechanism with the body attached to the drain discharge port of the drain reservoir, the pressure fluid in the pilot chamber or the pressure mechanism driven by the pressure fluid causes the outer wall of the tube to move. The drainage is stopped because it presses and cuts off the communication between both ends of the tube. When the pressure fluid in the pilot chamber or the pressure mechanism is discharged or supplied, the pressure fluid or pressure mechanism releases the pressure on the tube, and the elastic force of the tube restores the tube. Discharged from the outlet. in this case,
The drain does not come into contact with the outer peripheral surface of the tube because the drain flows in the tube.Therefore, even if a lubricant is applied to the seal portion on one or both outer peripheral surfaces of the tube, this lubricant will not be discharged by the drain. Absent.

[0006]

FIG. 1 shows a first embodiment of the present invention. This drain discharge device is constructed as a tube cartridge 4 which can be attached to and detached from a drain discharge port 2 provided on the bottom surface of a bowl which is an example of the drain reservoir 1. And the tube cartridge 4
Includes a body 5 and a tube 6 formed of a soft material having large elasticity and restoring force.

The body 5 has an axial flow passage 11, the upper end of which is attached to the drain discharge port 2 in an airtight and detachable manner, and the lower end opening of the flow passage 11 constitutes the drain outlet 12. . Further, the body 5 has grooves 13 and 13 facing each other near both ends of the flow channel 11, and a pilot chamber 14 surrounding the tube 6 in an intermediate portion of the flow channel, respectively. Both ends of 6 are slidably inserted. The outer peripheral surfaces of both ends of the tube 6 are liquid-tightly sealed by the O-rings 15, 15 fitted to the outer peripheral surfaces of the grooves 13, 13, and the inner peripheral surfaces of both ends are grooved 13, 13.
Slidably abuts on the guide walls 16 formed by. Further, the pilot chamber 14 is connected to a compressed air source (not shown) by a pilot pipe line 17.

In the first embodiment described above, in the illustrated state in which the pilot fluid is supplied to the pilot chamber 14, the outer wall of the tube 6 is pressed by the pilot fluid pressure, and the communication between the drain outlet 2 and the drain outlet 12 is established. Since it is shut off, drain discharge is stopped. In this case, the both ends of the tube slide in the grooves 13, 13 by the pressing of the tube 6 by the pilot fluid pressure, but the both ends of the tube 6 have a length that does not come out of the seal portion formed by the O-rings 15, 15. Of course, When the pilot fluid in the pilot chamber 14 is discharged, the tube 6 is restored to the state in which the drain discharge port 2 and the drain outlet 12 communicate with each other due to the weight of the drain pressed by the air pressure acting on the drain and the elastic force of the tube itself. Drainage is discharged (see the dotted line in the figure).

In this case, the drain flowing in the tube 6 does not come into direct contact with the lubricant such as grease applied to the O-rings 15 and 15, so that even if the drain contains foreign matter such as solid matter or mud. It can be used continuously for a long time. Further, even if a foreign matter in the drain is caught between the wall surfaces of the pressed tube 6, it is possible to prevent the drain from leaking by setting the length of the pressure contact portion of the tube 6 to an appropriate length. In addition, the tube 6
If the tube cartridge is damaged, the tube cartridge 4 may be replaced, so that maintenance is easy.

FIG. 2 shows a second embodiment of the present invention, in which the tube cartridge 20 is provided below the bowl 1.
The pressing mechanism 2 for pressing the tube 6 provided in the body 21 of the
2 is attached. The pressing mechanism 22 includes a cylinder, a piston 23 that slides in the cylinder, and a rod 24 thereof. The cylinder is partitioned by the piston 23 into a pilot chamber 25 on the tube cartridge 20 side and a pressure chamber 26 on the opposite side. A clamp 28 for pressing the outer wall of the tube 6 is attached to the tip of the rod 24 passing through the hole 21a provided in the body 21.
On the other hand, the pressure chamber 26 communicates with the inside of the bowl 1 through a pipe line 29, and pilot air is supplied and discharged from the pilot pipe line 17 to the pilot chamber 25 in which the return spring 30 of the piston is contracted.

In the second embodiment, the pressure chamber 26 is provided in the bowl 1.
In the illustrated state in which the internal air pressure acts and the pilot air in the pilot chamber 25 is discharged, the piston 23 and the rod 24 are resisted by the urging force of the return spring 30 by the air pressure supplied to the pressure chamber 26. The clamp 28 is moved to the left, and the clamp 28 presses the outer wall of the tube 6 toward the opposite side wall to block the communication between the drain discharge port 2 and the drain outlet 12, so that the discharge of the drain is stopped. Pilot room 2
When pilot air is supplied to 5, the piston 23 and the rod 24 move to the right in the figure, so that the tube 6 is drained by the drain's own weight pressed by the air pressure acting on the drain and the elastic restoring force of the tube 6. The drain is discharged because the drain 2 and the drain outlet 12 are restored to communicate with each other (see the dotted line portion in the figure). When the pilot air in the pilot chamber 25 is discharged, the piston 23 and the rod 24 return to the illustrated state due to the air pressure in the pressure chamber 26, and the clamp 28 presses the outer wall of the tube 6, so that the drain discharge is completed. Since the other operations of the second embodiment are the same as those of the first embodiment, the description thereof will be omitted.

FIG. 3 shows a third embodiment of the present invention. A tube pressing mechanism 34 is incorporated in a body 33 of a tube cartridge 32 in the third embodiment. The body 33 has a cylinder 35 and upper and lower openings, and a support wall 36 for the tube 6 extending into the cylinder at the upper opening.
However, the guide wall 37 of the tube 6 is formed by the groove 13 around the lower opening. The tube 6 inserted between the upper and lower openings is slidably or non-slidably attached to the support wall 36 by the attachment member 38 inserted in the tube, and the lower portion is slid in the groove 13. It is movably inserted.

The cylinder 35 is partitioned into a pilot chamber 25 and a pressure chamber 26 by an annular piston 40 that slides in the cylinder along a support wall 36, and the piston 4
On the pilot chamber 25 side of No. 0, a conical pressing portion 41 is integrally formed. The pair of swinging members 43, 43 having an intermediate portion pivotally supported by a pin 42 are provided with a roller 44 on the piston 40 side, which abuts against the pressing portion 41, and a clamp roller 45 on the tube 6 side, which presses the tube. There is. Since the other structure of the third embodiment is the same as that of the second embodiment, the same reference numerals are given to the same main parts in the drawings, and detailed description thereof will be omitted.

In the third embodiment described above, the piston 40 moves downward and is provided on the rocking members 43, 43 when the compressed air is supplied to the pressure chamber 26 and the pilot air in the pilot chamber 25 is discharged. Since the clamp rollers 45, 45 swing in the direction of approaching each other and press the both side walls of the tube 6, the drain discharge is stopped (see the right side of FIG. 3). When pilot air is supplied to the pilot chamber 25, the piston 40 moves upward due to the sum of the acting force of the pilot air pressure and the urging force of the return spring 30, and the weight of the drain pressed by the air pressure acting on the drain and the restoration of the tube 6 itself. Due to the force, the tube 6 is restored and expands its diameter,
The inside of the bowl 1 communicates with the drain outlet 12, and the drain is discharged. The other operation of the third embodiment is the same as that of the second embodiment.

Although not shown, in these embodiments, a detection mechanism for detecting the liquid level of the drain is provided, and the pilot air is supplied to and discharged from the pilot conduit 17 by the detection mechanism. , Can be an auto drain.

[0016]

The drain discharge device of the present invention is a drain containing solid matter or mud-like foreign matter in order to discharge or stop the drain by pressing and restoring the tube through which the drain flows. However, it is possible to operate reliably without causing malfunction for a long period of time.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a first embodiment.

FIG. 2 is a vertical sectional front view of a second embodiment.

FIG. 3 is a vertical sectional front view of a third embodiment.

[Explanation of symbols]

 1 bowl 2 drain discharge port 5,21,33 body 6 tube 12 drain outlet 14 pilot chamber 22,34 pressing mechanism

Claims (2)

[Claims] 1. A drain discharge device attached to a drain discharge port of a drain reservoir, wherein the drain discharge device has a hollow body which is attachable to the drain discharge port at one end and has a drain outlet at the other end. A tube formed of a soft material, the outer peripheral surfaces of both ends of which are liquid-tightly mounted in the hollow part of the body, and one or both ends of which are slidably mounted in the hollow part, and between the hollow part of the body and the tube outer wall. A drain chamber, comprising: a pilot chamber, wherein the outer wall of the tube is pressed and restored by supplying / discharging the pressurized fluid to / from the pilot chamber to disconnect communication between both ends of the tube. 2. A drain discharge device attached to a drain discharge port of a drain reservoir, wherein the drain discharge device has a hollow body which is attachable to the drain discharge port at one end and has a drain outlet at the other end. A tube formed of a soft material, having outer peripheral surfaces at both ends in a liquid-tight manner in the hollow portion of the body, and one end or both ends slidably mounted in the hollow portion, and a tube operated by supply and discharge of fluid pressure. A drain discharge device, comprising: a pressing mechanism, which presses and restores the outer wall of the tube by supplying and discharging the pressure fluid to and from the pressing mechanism to disconnect communication between both ends of the tube.