CN218377790U

CN218377790U - Hydraulic pinch valve for vertical filter press

Info

Publication number: CN218377790U
Application number: CN202222350002.6U
Authority: CN
Inventors: 李斌; 郭学敬; 姜毅婕; 孙海波; 潘俊峄
Original assignee: Yantai Hexin Environmental Protection Equipment Co ltd
Current assignee: Yantai Hexin Environmental Protection Equipment Co ltd
Priority date: 2022-09-05
Filing date: 2022-09-05
Publication date: 2023-01-24
Anticipated expiration: 2032-09-05

Abstract

The utility model relates to a hydraulic pressure pinch valve for vertical filter press belongs to pinch valve technical field, half valve body including two symmetry settings, two the centre gripping has the rubber valve cover in the middle of the half valve body, two the half valve body all is equipped with the pneumatic cylinder, the piston rod of pneumatic cylinder is equipped with the ejector pin, the one end that the pneumatic cylinder was kept away from to the ejector pin is contradicted with the rubber valve cover. This application has installation easy maintenance, the reliability is high, the good advantage of leakproofness.

Description

Hydraulic pinch valve for vertical filter press

Technical Field

The utility model relates to a hydraulic pinch valve for vertical filter press belongs to pinch valve technical field.

Background

The vertical filter press comprises a feed valve (slurry mixed with solid and liquid enters the filter press through the feed valve), a blowdown valve (sediment accumulated at the lower end of a main feed pipe and larger particles filtered by a feed filter are discharged out of the filter press through the feed valve) and an air drying valve (compressed air enters each filter chamber through the air drying valve to dry filter cakes so as to reduce the liquid content of the filter cakes) and a washing valve (washing water enters each filter chamber through the washing valve to wash the filter cakes so as to remove certain components or washing water enters a main feed pipe and a feed hose through the air drying valve to wash pipelines so as to ensure the feed efficiency) which are connected to the main feed pipe in parallel, wherein valve core parts of the main feed pipe are in contact with (the first two) or (the second two) with the slurry containing solid particles, and the solid particles inevitably wear the valve cores, so that if the four valves adopt butterfly valves, ball valves and the like which are sealed in a hard mode or semi-hard mode, the valve cores can not be sealed when reaching a certain amount, the valve cores can be worn, and the slurry, water and gas can be mixed, thereby affecting the production and even causing safety accidents. And the maintenance of butterfly valves, ball valves and the like is also complex and tedious. Therefore, it is most reasonable to use pinch valves for these four valves.

As the name suggests, the valve core of the pinch valve is a wear-resistant rubber pipe with square flanges at two ends, and the rubber pipe is clamped and fixed by two symmetrical valve bodies and then connected into a pipeline by the flanges at two ends. When the valve needs to be closed (namely, the two ends are not communicated), the middle part of the rubber tube can be transversely extruded by external force, so that the middle part of the rubber tube is flat, the inner parts of the rubber tube are completely attached together, and certain sealing force is generated by the elastic deformation of rubber, thereby achieving the effect of separating media at the two ends. When the valve needs to be opened (namely two ends are communicated), the external force of extrusion is removed, the rubber tube can be quickly restored under the action of medium pressure, and the passing of the medium is not influenced. The rubber tube is made of wear-resistant rubber, and even if the rubber tube is worn to a certain extent after being used for a period of time, the rubber tube still reliably extrudes and deforms to ensure the sealing effect, so that the rubber tube has a long service life.

The existing pinch valve is pneumatically controlled, namely a rubber tube is extruded by the thrust of an air cylinder to generate sealing force. This approach has its disadvantages: 1. the air pressure is relatively low, and the rubber tube needs a large extrusion force to achieve a reliable sealing effect, so that the cylinder diameter of the matched cylinder is large. The larger the drift diameter of the rubber tube is, the larger the required pressing force is. The diameter of the cylinder of the pinch valve with medium and large specifications is very large, so the pinch valve has larger volume and weight. The valve body is cast by carbon steel or stainless steel, so the whole pinch valve has large volume and heavy weight, and is not beneficial to installation, maintenance and replacement; 2. the air pressure is easy to fluctuate, once the pressure is insufficient, the extrusion force is insufficient, and the pinch valve is not tightly sealed, so that slurry, water and air are mutually connected.

SUMMERY OF THE UTILITY MODEL

The utility model provides a hydraulic pinch valve for vertical filter press to the not enough of prior art existence.

The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides a hydraulic pressure pinch valve for vertical filter press, includes the half valve body that two symmetries set up, two the centre gripping has the rubber valve cover in the middle of the half valve body, two the half valve body all is equipped with the pneumatic cylinder, the piston rod of pneumatic cylinder is equipped with the ejector pin, the one end that the pneumatic cylinder was kept away from to the ejector pin is contradicted with the rubber valve cover.

The beneficial effect who adopts above-mentioned scheme is: the pinch valve is controlled by hydraulic pressure, and even if the pinch valve with a medium or large specification is adopted, the cylinder diameter of a matched hydraulic cylinder is small; and the valve body is cast by aluminum alloy. Therefore, compared with the existing pneumatic pinch valve, the size and the weight of the pneumatic pinch valve are greatly reduced, the installation, the maintenance and the replacement of the pinch valve are facilitated, meanwhile, the hydraulic pressure is stable, enough extrusion force can be always ensured, and the hidden trouble that slurry, water and gas are mutually connected due to the fact that sealing is not tight is avoided.

On the basis of the technical scheme, the utility model discloses can also do as follows the improvement:

further, the ejector pin includes connecting portion and butt portion, connecting portion and butt portion integrated into one piece, the mounting hole with the piston rod looks adaptation of pneumatic cylinder is seted up to connecting portion.

Furthermore, the connecting part is provided with a first pin hole, a piston rod of the hydraulic cylinder is provided with a second pin hole communicated with the first pin hole, and the same elastic cylindrical pin penetrates through the first pin hole and the second pin hole.

Further, the cross-section of butt portion is ring column structure, connecting portion are equipped with four archs, the one end that connecting portion were kept away from to the arch offsets with half valve body.

Furthermore, the end parts of the two half valve bodies are provided with connecting flanges, the end part of the rubber valve sleeve is provided with a first screw hole, and the connecting flange is provided with a second screw hole corresponding to the first screw hole.

Furthermore, square flanges are arranged on the outer sides of the two half valve bodies, cylinder bodies of the hydraulic cylinders are fixedly installed on the square flanges, one ends of the two square flanges, which are far away from the hydraulic cylinders, are respectively abutted against the outer side faces of the two half valve bodies, and the two square flanges and the two half valve bodies are fixed through bolts and nuts.

Furthermore, two magnetic switches are arranged outside the hydraulic cylinder.

Compared with the prior art, the beneficial effects of the utility model are that:

1. this application is through setting up two half valve bodies, rubber valve barrel, two pneumatic cylinders, and the piston rod of pneumatic cylinder is equipped with the ejector pin inconsistent with rubber valve barrel, when needing to close rubber valve barrel, starts the pneumatic cylinder, and the piston rod of pneumatic cylinder stretches out and promotes the ejector pin and carry out the extrusion to rubber valve barrel and make it closed. The hydraulic cylinder is used for replacing an air cylinder, so that the volume and the weight of the pinch valve are greatly reduced, the sealing performance is ensured, and the phenomenon of slurry leakage or mutual connection is avoided;

2. according to the hydraulic cylinder, the two magnetic switches are arranged outside the hydraulic cylinder, and when the hydraulic cylinder is closed and opened in place, signals can be sent out respectively, so that a full-automatic operation program can execute the next action.

Drawings

FIG. 1 is a schematic view of the hydraulic pinch valve for a vertical filter press according to an embodiment of the present application;

fig. 2 is a left side view (right side view) of fig. 1;

FIG. 3 is a schematic cross-sectional view of FIG. 1;

fig. 4 is a schematic cross-sectional structure of fig. 2.

In the figure, 1, a rubber valve sleeve; 11. a first screw hole; 2. a half valve body; 21. a second screw hole; 3. a hydraulic cylinder; 31. a cylinder body; 32. a piston rod; 33. a magnetic switch; 4. a square flange; 5. a bolt; 6. a top rod; 61. a protrusion; 7. and the elastic cylindrical pin.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms different from those described herein and similar modifications may be made by those skilled in the art without departing from the spirit and scope of the invention and, therefore, the invention is not to be limited to the specific embodiments disclosed below.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

As shown in fig. 1, fig. 2, fig. 3 and fig. 4, a hydraulic pinch valve for a vertical filter press comprises two half valve bodies 2, a rubber valve sleeve 1 and two hydraulic cylinders 3, wherein the two half valve bodies 2 are symmetrically arranged, the rubber valve sleeve 1 is clamped between the two half valve bodies 2, the two hydraulic cylinders 3 are respectively arranged at the outer sides of the two half valve bodies 2, piston rods 32 of the two hydraulic cylinders 3 are respectively connected with an ejector rod 6, one end of the ejector rod 6, far away from the hydraulic cylinder 3, is abutted against the rubber valve sleeve 1, the hydraulic cylinders 3 are started, and the piston rods 32 of the hydraulic cylinders 3 extend out to push the ejector rods 6 to extrude the rubber valve sleeve 1, so that the rubber valve sleeve 1 can be closed. The hydraulic cylinder 3 is used for replacing a cylinder, so that the volume and the weight of the pinch valve are greatly reduced, the hydraulic pressure is stable, the sealing performance can be reliably ensured, and the problem of leakage or mutual connection of slurry and the like can be avoided.

As shown in fig. 3 and 4, the ejector rod 6 includes a connecting portion and an abutting portion, the connecting portion and the abutting portion are integrally formed, the connecting portion is provided with a mounting hole matched with the piston rod 32 of the hydraulic cylinder 3, the connecting portion is provided with a first pin hole, the piston rod 32 of the hydraulic cylinder 3 is provided with a second pin hole communicated with the first pin hole, the same elastic cylindrical pin 7 penetrates through the first pin hole and the second pin hole, and the reliability of connection between the piston rod 32 and the ejector rod 6 can be ensured.

As shown in fig. 3, the abutting portion has a circular ring-shaped cross section, and when the two piston rods 32 extend out to push the connecting portion to displace inward, the abutting portion with two circular ring-shaped cross sections simultaneously extrudes the rubber valve sleeve 1, thereby ensuring that the rubber valve sleeve 1 produces a reliable sealing effect.

As shown in fig. 3 and 4, the connecting portion is provided with four protrusions 61, one end of each protrusion 61, which is far away from the connecting portion, is abutted against the inner wall of the half valve body 2, and when the connecting portion is driven by the hydraulic cylinder 3 to displace in the half valve body 2, the protrusions 61 can reduce the contact area between the push rod 6 and the inner wall of the half valve body 2, i.e., the friction resistance can be reduced.

As shown in fig. 2 and 3, the end portions of the two half valve bodies 2 are provided with connecting flanges, the end portion of the rubber valve sleeve 1 is provided with a first screw hole 11, and the connecting flanges are provided with a second screw hole 21 corresponding to the first screw hole 11, so that the pinch valve can be conveniently installed and connected in a pipeline.

As shown in fig. 1, 2, 3 and 4, square flanges 4 are arranged on the outer sides of the two half valve bodies 2, a cylinder body 31 of the hydraulic cylinder 3 is fixedly installed on the square flanges 4, one ends, far away from the hydraulic cylinder 3, of the square flanges 4 are respectively abutted to the outer side faces of the two half valve bodies 2, the two square flanges 4 and the two half valve bodies 2 are fixed together through bolts 5 and nuts, and the bolts 5 penetrate through the two mounting flanges 4 and the two half valve bodies 2 and are locked through the nuts, so that the connection firmness of all parts of the pinch valve is guaranteed.

As shown in fig. 1, 2, 3 and 4, two magnetic switches 33 are provided outside the hydraulic cylinder 3, and when the hydraulic cylinder 3 is in the closed position and the open position, the two magnetic switches 33 can respectively send out signals so that the full-automatic operation program can execute the next action.

The implementation principle of the hydraulic pinch valve for the vertical filter press in the embodiment of the application is as follows: the hydraulic pinch valve is arranged on a pipeline, when materials need to be conveyed, the two hydraulic cylinders 3 are started, the piston rods 32 of the two hydraulic cylinders 3 retract, and the materials can be conveyed through the rubber valve sleeve 1; when the material conveying needs to be stopped, the piston rod 32 of the hydraulic cylinder 3 extends out to push the ejector rod 6 to extrude the rubber valve sleeve 1 to be closed.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a vertical hydraulic pressure pinch valve for filter press which characterized in that: including half valve body (2) that two symmetries set up, two the centre gripping has rubber valve barrel (1), two in the middle of half valve body (2) all is equipped with pneumatic cylinder (3), piston rod (32) of pneumatic cylinder (3) are equipped with ejector pin (6), the one end that pneumatic cylinder (3) were kept away from in ejector pin (6) is inconsistent with rubber valve barrel (1).

2. The hydraulic pinch valve for a vertical filter press of claim 1, wherein: the ejector rod (6) comprises a connecting portion and an abutting portion, the connecting portion and the abutting portion are integrally formed, and the connecting portion is provided with a mounting hole matched with a piston rod (32) of the hydraulic cylinder (3).

3. The hydraulic pinch valve for a vertical pressure filter according to claim 2, wherein: the connecting part is provided with a first pin hole, a piston rod (32) of the hydraulic cylinder (3) is provided with a second pin hole communicated with the first pin hole, and the same elastic cylindrical pin (7) penetrates through the first pin hole and the second pin hole.

4. The hydraulic pinch valve for a vertical filter press of claim 2, wherein: the cross-section of butt portion is the ring structure, connecting portion are equipped with four archs (61), the one end that connecting portion were kept away from in protruding (61) is inconsistent with half valve body (2).

5. The hydraulic pinch valve for a vertical pressure filter according to claim 1, wherein: two half valve body (2) tip is equipped with flange, screw hole one (11) have been seted up to rubber valve barrel (1) tip, flange sets up screw hole two (21) corresponding with screw hole one (11).

6. The hydraulic pinch valve for a vertical filter press of claim 1, wherein: square flanges (4) are arranged on the outer sides of the two half valve bodies (2), cylinder bodies (31) of the hydraulic cylinders (3) are fixedly installed on the square flanges (4), one ends, far away from the hydraulic cylinders (3), of the two square flanges (4) are respectively abutted to the outer side faces of the two half valve bodies (2), and the square flanges (4) and the half valve bodies (2) are fixed through bolts (5) and nuts.

7. The hydraulic pinch valve for a vertical filter press of claim 1, wherein: two magnetic switches (33) are arranged outside the hydraulic cylinder (3).