JPH03189491A - Valve device structure - Google Patents

Abstract

PURPOSE:To improve durability, against hard use, of a pump which performs high pressure force-feeding by forming the rear end part of a poppet into a piston, and also forming a cylinder in a tube, and annularly bridging the poppet to the tube so as to annularly form an annular flexible film body. CONSTITUTION:In a valve device 1', a tube 4 provided in a block-like specified case 2 through a liner or the like is inserted-through a shank 5 under the head of a poppet 3' so as to accommodate/support the poppet 3' in the free state of advancing/receding displacement. A piston 23 is screwingly fitted to the rear end part, extended from the shank 5, of the poppet 3', and the case 2 forms a cylinder 27 by means of its connection to the tube 4 so as to suppress the offset of the poppet 3' in its advancing/receding motion. Underhand-type grooves 17, 18 are further bored in the under-head part of the poppet 3' and the end part of the tube 4, and on the other hand an annular flexible film body 19 made of rubber or the like is annularly provided by bridging it to the poppet 3' and the tube 4, with its end part, formed by enlarging the film body 19 into dam-like cross section, etc., fitted in the grooves 17, 18.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The disclosed technology belongs to the technical field of the structure of a valve device installed in a suction/discharge section of a pump for pumping slurry or the like.

<Summary of the gist> The invention of this application is a tube provided in a predetermined case such as a block through a liner, etc., and a valve body such as a poppet is moved forward and backward by inserting the shank under the neck into the tube. This invention relates to a valve device structure that is supported in a freely accommodated manner, and in particular, a piston is attached to the rear end of a poppet by screwing it so as to extend the shank, and the case is connected to a tube and a cylinder is attached. Furthermore, an underhang-like groove is bored under the neck of the poppet and the end of the tube, and an annular movable membrane made of rubber or the like is connected to the poppet and the tube. The ends formed in a dam-like cross section are fitted to form a ring, and the inside is filled with a liquid such as lubricating oil.
While preventing foreign matter from entering the sliding part between the shank and the tube, the poppet cooperates in forward and backward movement within the cylinder provided in the case of the piston, which extends from each end. This is a defense concerning the structure of a valve device that allows the valve to be opened and closed reliably.

<Prior Art> As is well known, pumps used in various industries are configured to operate various valve devices when they are operated, and are used to transfer liquids in the form of fluids or slurries. For example, a one-way valve is provided at the suction/discharge part of a plunger type pump and connected to a predetermined piping so that the processing liquid flows in a pulsating manner by a predetermined p7m operation of the valve device. It is being said.

And, high ay
- The pressure applied to each part of the pump used in the processing plant may be excessive, and the valve device used must be one with sufficient pressure resistance and durability. The airtightness and other functions of the various connecting parts must be sufficient to withstand severe usage conditions.

As shown in FIG. 7, the valve device 1 houses a valve body 3 of the type 2 in a case body 2, and a tube 4 is bored in one side of the case body 2. The tube 4
Shank 5 of poppet 3 is on! is movably inserted into the valve seat, a supply/discharge boat 6.7 is bored on the other side of the case body 2, and the head portion 8 of the poppet 3 is tapered inside the supply/discharge boat 6.7. 9 so as to be able to freely come into contact with and separate from the supply/discharge boat 6.7 to close the supply/discharge boat 6.7, and open/close the valve device 1 through the biasing force of a spring inserted between the case and the poppet as appropriate. The relative movement of the poppet 3 through its seating and forward/backward movements is made accurate at which engagement portion of the case body 2 of No. 3, so that the valve operates reliably.

Then, one side and the other end of the case body 2 are connected with bolts 10 as appropriate.
The supply/discharge boat 6.7 is connected to the pump 12 and the next-stage processing device 13 such as a filter press through appropriate piping. ing.

<Problems to be Solved by the Invention> However, as described above, the pressure applied to the pump 12 and various parts of the valve device 1 during pressure feeding of slurry etc. is excessive, and when pressure is applied, the poppet 3 If the tube 4 is not moved smoothly back and forth, the pressure will leak at various joints such as the shank 5 of the poppet 3 and the sliding part of the case body 2, causing the slurry to leak into the case body 2.
When the poppet 3 moves back and forth, particles of micron size may enter the gap between the poppet 3 and the tube 4, causing friction in the area and causing uneven wear.

To deal with this, the valve device 1 through which the processing liquid flows is equipped with an elastic material that adapts to the stroke displacement at the sliding part to prevent galling or uneven wear of the poppet 3 due to the intrusion of particles such as slurry. If the membrane body is sulfurized and the shanks of poppets 1 to 1 are attached in an enveloping position, the membrane body may become fatigued from internal expansion and contraction due to the movement of the poppet, causing cracks or peeling. Moreover, it was difficult to connect metal parts such as poppets and cases, and it was difficult to function sufficiently as a protective film.

<Object of the Invention> The object of the invention of this application is to solve the problems of durability and operability of the valve device structure for high-pressure fluid based on the above-mentioned prior art, and to solve the problem of the valve body operating normally in a high-pressure state. This is done to ensure stable operation of the valve device while avoiding the intrusion of liquids such as slurry into the sliding parts, and to improve the durability of high-pressure pumps against harsh use, thereby improving the durability of pumps used in various industries. It is an object of the present invention to provide an excellent valve device structure that will benefit the field of liquid processing technology application in the field.

<Means/effects for solving the problem> In order to solve the above-mentioned problem, the structure of the invention of this application, which is based on the scope of the above-mentioned patent claims, is to solve the above-mentioned problem. The shank under the poppet's neck is inserted into a tube provided through a liner, etc., and the poppet is supported in a housing manner so as to be freely movable forward and backward.
~ is attached with a piston screwed together so that the rear part extends the shank, the case is connected to the tube to form a cylinder, the poppet is prevented from deflecting when moving forward and backward, and the poppet is accommodated. By installing a hydraulic control device for the cylinder in the case, it is possible to control the forward and backward movement.
In addition, an underhang groove is bored under the poppet neck and the end of the tube, and an annular groove made of rubber or the like is formed to bridge the poppet and tube. The flexible membrane body is enlarged to have a dam-like cross-section, etc., and the end portion formed is fitted into the groove, and the internal pressure is stabilized by filling and covering the inside with liquid such as hydraulic oil. Poppet! When the flexible membrane body, which has a forward and backward stroke length of A technical measure has been taken to ensure that the valve opens and closes reliably in cooperation with the forward and backward movement of the valve.

<Example> Next, one example of the invention of this application will be described below based on FIGS. 1 to 5.

Note that the same parts as in FIG. 7 will be explained using the same reference numerals.

1' is a valve device, which forms the center of the gist of the invention of this application, and has a poppet 3' as a valve body in the center of the case body 2.
A tube 4 is provided with a liner inserted as appropriate so as to support the poppet 3' in a freely advancing and retracting manner, and the tube 4 is slidably inserted and stored in the shank 5 under the neck of the poppet 3', unlike the conventional mode. The same is true.

Incidentally, the case used in the description in the invention of this application means a member, and one case 2A on one side of the case main body 2
The case 28 is formed into a cylindrical shape and has a rectangular flange integrally provided at its rear end.

In addition, 14 is Patsukin.

Further, one case 2B on the other side of the case body 2 is provided so as to be fitted onto the case 2^, and is formed in a rectangular shape, and has an operating cavity 15 of the head portion 8 of the poppet 3' at its tip. is bored to form a discharge port 6 on the side.

Then, when the other case 2C is joined to the OH surface part 16 of the case 2B (7) a3, the working cavity 15 of the head of the poppet 3' is bored opposite to the coos 2B, and furthermore, the inner bottom part A valve seat 9 for the head portion 8 of the poppet 3 is formed into a tapered surface and has a suction port 7 bored therein, and is connected to the case 2B via an appropriate anchor bolt, so that the head portion 8 of the poppet 3' is connected to the valve seat 9. It is designed to be able to come into contact with and separate from the sheet 9.

When the case 2A and the poppet 3' are connected, an annular groove 17 is bored in the lower part of the poppet 3's neck, and the groove 17 has an underhanging shape in cross section. Similarly, an underhanging groove 18 having a linear cross-section is bored near the periphery of the tube 4.

A rubber annular flexible membrane body 19 is provided on the outer surface of the shank 5 exposed when the case 2A and the poppet 3' are connected.
is encapsulated, and the flexible membrane body 19 has ends 20.2 on both sides.
0 is enlarged into a dam shape, and its end portions 20 and 20 are fitted into grooves 17 and 18 provided in the poppet 3' and the case 2A to bridge the poppet, as shown in FIG. 3' is placed in a stretched position when it is moved forward, and can be bent outward when it is retracted.

Further, the inside of the flexible film body 19 is filled with lubricating oil 21 so that the pressure inside and outside the flexible film body 19 is equalized.

Further, as shown in FIG. 2, the poppet 3' is formed into a long length by extending toward the rear of the case body 2 (toward the left in the figure) and having a rond 22 connected to the shank 5 with a screw. A predetermined range of the rod 220 of the extension portion is threaded at close pitches, and a piston 23 is threaded onto the rod 22 and is sheathed thereon, and furthermore, a normal male screw is threaded onto the rear end.

The piston 23 has a boss portion 24, and a circumferentially circular sliding portion 25 is formed at the center portion in the axial direction with a packing 26 interposed therebetween.

Further, one case 2D at the round end of the case body 2 is formed as a cylinder 26 for the piston 23, and supports the piston 23 indirectly with its boss portion 24, while
Supply and discharge holes 2B and 29 are drilled in the side of the case 2D, and an appropriate hydraulic control 1IIvc (not shown) is connected thereto, serving as a double-acting piston, and is connected to the case 2A through seven rectangular flanges. They are connected with bolts 10.

The casing end 2F, which has an insertion hole 30 at the rear end of the case 2D, supports the piston 23, which is externally mounted on the poppet 3', in sliding contact with the poppet 3' through its boss 24, and is connected to the case 2D by seven flange members. The parts are connected via appropriate anchor bolts.

In addition, 31 is Patsukin.

A nut 32 for preventing removal is screwed onto the rear end of the rod 22 of the poppet 3'.

Thus, the poppet 3' in the 8B position 1' can freely close the suction port 7, so that the valve device @1' can be opened and closed.
In any connection between the poppet 3' and the case body 2, seating and forward/backward movement are performed accurately to ensure reliable opening/closing valve operation.

Further, as in the conventional aspect, the supply/discharge port 6.
7 is connected in a communicating state to a pump 12 (not shown) and a next-stage processing device 13 such as a filter press.

In the above configuration, the case body 2 has a long poppet 3'.
When supporting the poppet 3, it is formed to have a sufficient axial length for the forward and backward stroke of the poppet 3'.

In this embodiment, the case body 2 of the valve device 1' is case 2A, 28.2C, 20, 2 due to manufacturing reasons.
E, and are joined together when the poppet 3' is accommodated.

Then, attach the poppet 3' to the tube 4 provided in the case 2A.
The shank 5 of the piston 2 is inserted and supported, and the piston 2 is externally installed on a rod 22 extending below the neck of the poppet 3'.
3 is slidably supported by the cylinder 27 of the case 2D, and the screw! - The boss part 24 of the ring 23 is slidably supported by the casing end 2F at the contact part, so that
A stable 3j with no Q-bend in the forward and backward direction of the poppet 3'! A retreat action is performed.

An annular flexible membrane body 19 made of rubber covers the outer surface of the shank 5 that is exposed when the case 2A and the poppet 3' are connected, and bridges the tube 4 and the poppet 3'. With this, processing liquid such as slurry does not come into contact with the poppet 3' when it moves back and forth, and there is no risk of penetrating objects entering, so the movement of the poppet 3' can be performed stably. .

Furthermore, as shown in FIG. 3, the end portion 20 of the flexible membrane body 19 is formed into an annular dam shape and is fitted into the tube 4 and the poppet 3', so that the poppet 3' can be moved back and forth. Deflection associated with movement is absorbed.

Further, the case 2B and the case 2C form the operating cavity 15 of the head 8 of the poppet 3', and integrally form the case body 2.
is formed, and the case 2A is connected to the valve seat 9.
, 28.2C, the poppet 3' is supported by the poppets 3', 28.2C, and 28.2C.

The piston 23 is moved by the cylinder 27 to the sliding portion 25 of the piston 23 and the boss portion 24 of the piston 23.
．． The piston 23 and the rod 22 are slidably supported at three points 24, and the pitch between the piston 23 and the rod 22 is closely spaced and the piston 23 and the rod 22 are screwed into one body, so that the accuracy of operation is high.

Therefore, the poppet 3' is not deflected in the advancing and retreating directions within the case body 2, and there is no intrusion of foreign matter, which prevents slurry under high pressure from flowing through when the pump 12 is operating. However, the initial machining accuracy of each part of the connection between the case body 2 and the poppet 3' is maintained (uneven wear and the like does not occur), and therefore the durability of the valve device 1' is improved.

Furthermore, since the piston 23 that advances and retreats the cylinder 27 is IG-pulled to the rear part of the shaft of the poppet 3', pressure is applied to the shaft body along the direction of movement of the poppet 3' through the control of the hydraulic control device. The pressure applied to the head 8 of the poppet 3' is buffered through the inflow of the slurry discharged at high pressure through the pump 12, thereby improving the supply and discharge efficiency of the valve C position 1'.

It should be noted that the embodiment of the invention of this application is not limited to the above-mentioned one embodiment, but includes the ends 20, 20 of the flexible membrane body 19 and the groove 17.
18, the dam shape of the end portion 20 of the flexible membrane body 19 may be made deep and elongated, for example, as shown in FIG. 6
It is possible to adopt a structure as shown in Fig. d, and in Fig. 6C, a metal elastic ring 20' is cast into the end portion 20 to prevent it from falling off, and the flexible membrane body is fitted with a bellows. Alternatively, the rod may be integrated into a bobetsu 1~
Various methods can be adopted, such as molding the rod or connecting the rod and the poppet with appropriate links.

<Effects of the Invention> As described above, according to the invention of this application, the durability and operability of the valve device are basically improved. The excellent effect is that the operation of the valve device is performed normally and the valve device is operated reliably and stably according to the design h1.

Therefore, in the connection between the valve device case and the poppet,
A ring-shaped flexible membrane covers the sliding part between the tube and shank that occurs each time they approach and separate, preventing contact with processing liquids such as slurry, so sliding is smooth. This provides an excellent effect in that the valve operation is reliably performed without interfering with the forward and backward movement of the piston formed extending from the rear end of the poppet.

Then, the end of the flexible membrane body is made into an annular dam-like enlarged cross section and is fitted to the tube and poppet, so it absorbs strain when it bends as the poppet advances and retreats. It is highly effective and has excellent durability.

Furthermore, the flexible membrane body is easy to be elastically fitted, and there is no risk of it falling off after installation, resulting in an excellent effect on the durability of the valve device.

Then, 1 on the tube! The poppet is supported in the case by inserting the link, and the bottom of the poppet neck is extended and a piston is attached to the poppet, which is slidably supported by a cylinder provided in the case. This allows the pressure to be applied to the shaft body to be stable, and can sufficiently cope with the excessive pressure applied to various parts of the pump device and valve neck during pressure feeding processes such as slurry 1-no. Poppets due to intrusion of flowing slurry stock solution and micron-sized particles!・The gap between the poppet and the tube prevents friction and wear, allowing the poppet to move forward and backward normally (1) It has the excellent effect of improving durability and ease of maintenance.

Historically, the valve body of the valve device was attached to the case as a piston.
() By making the cylinder advance i, 1
■The pressure generated by the feeding pump device is suction! When the processing liquid flows into the valve body under high pressure, it acts on the axial rigidity of the valve body, so the head moves back and forth under uniform pressure, ensuring smooth flow to the discharge boat. The effect is that the supply and discharge efficiency of the valve device can be improved.

Since the valve device of the invention of this application matches the axial direction of the poppet i~, the shearing of the poppet,
It has the advantage of being able to prevent destruction and also making the poppet lighter.

Also, since the cases are connected to each other using bolts, regular
It has the advantage that irregular maintenance is easy.

Furthermore, by operating the poppet piston under predetermined hydraulic control, an excellent effect can be obtained in that it can be synchronized with the suction and discharge timing of the pressure pump.

[Brief explanation of drawings]

Figures 1 to 5 are explanatory diagrams of one embodiment of the invention of this application, in which Figure 1 is a sectional view of the valve device, Figure 2 is a sectional view of the valve body and case, and Figure 3 is the same operation. Fig. 4 is an enlarged sectional view of the connecting portion of the flexible membrane body, Fig. 5 is a top view of the valve device, and Figs. 6a to 6d are the connection of the flexible membrane body in each embodiment. FIG. 7 is an enlarged sectional view of the portion, and is a schematic partial sectional view of a prior art valve device. 2... Case, 4... Tube, 3.3'... Poppet, 5... Shank, 1.1'... Valve device, 23... Piston, 22... Extension part ( Rod) 27...Cylinder, 19...Flexible membrane body, 20...Annular end, 17, 18...Groove, 28, 29...Suction/discharge hole 5...Shank 1,1 '...Valve Ill 23
...Piston 22...Extension part (rod) 21...
Cylinder 19... Flexible membrane body 20... Annular end 1
7.111...Kan 28, 29...@Drain hole Fig. 6C Fig. 6b Fig. 6c Fig. 6d

Claims (5)

[Claims] (1) In a valve device structure in which a poppet has a shank inserted into a tube provided in a case and is supported so as to be movable back and forth, the rear end of the poppet extends the shank to form a piston, and a cylinder is attached to the tube. A valve device structure characterized in that a ring-shaped flexible membrane body is provided around the poppet and the tube. (2) The annular end of the flexible membrane body has a dam-like cross section and is fitted into a groove bored under the neck of the poppet and at the end of the tube. A valve device structure according to claim 1. (3) The valve device structure according to claim 1, wherein the inside of the flexible membrane body is filled with liquid. (4) The valve device structure according to claim 1, wherein the extension portion of the shank formed on the poppet is threadedly connected to the piston. (5) The valve device structure according to claim 1, wherein a case forming a cylinder for the piston is provided with a suction/discharge hole and connected to a hydraulic control device.