CN110319231A - A kind of pipe clip valve - Google Patents

Abstract

The present invention discloses a kind of pipe clip valve, including valve body, the intrinsic rubber tube of valve body internal pressure, lateral intensive aspect and center intensive aspect are respectively equipped with inside at the both ends and center of the rubber tube, Liang Ge elastic stretching area is formed between the center intensive aspect and lateral intensive aspect, the rubber tube inner sidewall is crosslinked with neoprene glue-line, and the inner sidewall of the neoprene glue-line is crosslinked with EPDM glue-line.The pipe clip valve, when the pressure of flow liquid is greater than the intracavitary pressure of pressure and causes to leak at the first close port in pipe, the second close port closure stops the flowing of extraction raffinate, realizes perfect closure effect, convenient for the obturation effect for being closed and improving after closure, globality enhances the durability of rubber tube.

Description

A pinch valve

technical field

The invention relates to the technical field of valves, in particular to a pipe pinch valve.

Background technique

In various fluid conveying systems in metallurgy, chemical industry, cement, ceramics, glass, plastics, wastewater treatment, pharmaceuticals, food and beverage, brewing, railways, aviation, machinery and other industries, it is often necessary to pass through liquid-solid mixtures, wire harnesses, powders and other media. Pipeline transportation, such as weighing systems, powder coating, vacuum toilets, cable processing, suction and compressed air control systems, etc.

Conveyors include fiber-containing liquid, petroleum, ore pulp, cement, powder, slurry, cable harness, sewer sludge and other media. If the traditional gate valve is used in the above fields, when the gate is closed, the gate cannot be completely closed due to the support of solid objects in the medium, so that the fluid in the medium can still pass through, and the function of closing the valve cannot be achieved.

The inner sleeve of the pinch valve is a part of the delivery pipeline, which is an elastic material with a certain strength. By applying a compressed medium to the air chamber outside the inner bushing, causing it to be squeezed and deformed to close the pipeline, the conveyed medium in the pipeline can be completely blocked.

In the prior art, for example, the utility model patent with the application number of 201420733232.3, the inner bushing is set so that the two ends are squeezed and deformed to achieve the sealing function, but when the pressure at the flow end is higher than the pressure in the pressure chamber after being blocked, There will be gaps in the bonding surface, which will cause leakage;

Another example is the utility model patent with application number 201620729348.9, which is equipped with double-pressed hoses to improve the sealing effect, but the hose connection is prone to gaps, or even breaks, and the service life is short;

Another example is the utility model patent with application number 201320024140.3, which increases the flex fatigue resistance of the pipe body surface, but the cold resistance, corrosion resistance, water resistance and mechanical strength of the rubber hose are low, which cannot meet the actual use needs.

Contents of the invention

The purpose of the present invention is to provide a pinch valve to solve the problems raised in the background art above.

In order to achieve the above object, the present invention provides the following technical solutions: a pinch valve, including a valve body, the internal pressure of the valve body is a rubber tube, a pressure cavity is formed between the valve body and the rubber tube, and the two sides of the valve body The port is fixedly connected with an end cover, and the valve body is provided with an injection nozzle;

The two ends and the center of the rubber tube are respectively provided with a lateral reinforcement and a central reinforcement, and two elastic stretch zones are formed between the central reinforcement and the lateral reinforcement;

The inner wall of the rubber tube is cross-linked with a neoprene layer, and the inner wall of the neoprene layer is cross-linked with an EPDM rubber layer.

Preferably, both ends of the pressure chamber are provided with elastic sealing bodies, and the elastic sealing bodies are clamped on the valve body, and the upper and lower sides are in contact with the inner wall of the valve and the outer wall of the rubber tube respectively.

Preferably, the contact surface between the elastic sealing body and the rubber tube is a tooth structure.

Preferably, the rubber tube is a cylindrical structure, and the lateral reinforcing body parts at both ends are in the shape of an outward bell mouth, and an extension is provided inside the central opening of the end cap, and the lateral reinforcing body and the extending part fit together.

Preferably, the middle reinforcing body is annular and embedded in the rubber tube, and the inner diameter of the middle reinforcing body is the same as the inner diameter of the rubber tube.

Preferably, the injection nozzle is arranged at the center of the valve body.

Compared with prior art, the beneficial effect of the present invention is:

1. In the pinch valve, the two elastic stretching areas are deformed and closed, and the double closed ports form a complete closed effect. The first closed port bears the impact strength of the liquid flow direction, and the pressure of the liquid flowing in the pipe is greater than the pressure in the pressure chamber, resulting in the second closed port. When leakage occurs at the first closed port, the second closed port is closed to stop the flow of residual liquid to achieve a perfect closing effect.

2. The pinch valve, when the medium fills the pressure chamber and presses the deformation of the elastic stretch zone, stamps the elastic sealing body at the same time, and the elastic sealing body is pressed and deformed to tightly press the two ends of the rubber tube, which can be the largest in the pressure chamber. When the pressure is high, the elastic sealing body presses the rubber tube to the greatest extent to enhance the fixing effect on the rubber tube and prevent its displacement. The shape close to the mouth of the nozzle will not be stretched excessively, which is convenient for closing and improves the airtight effect after closing.

3. In the pinch valve, neoprene enhances the cold resistance, corrosion resistance and water resistance of the rubber tube, EPDM rubber enhances the mechanical properties of the rubber tube, and the overall durability of the rubber tube is enhanced to meet the actual use needs.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of rubber tube of the present invention;

Fig. 3 is a schematic diagram of the closed state structure of the present invention.

In the figure: 1. End cover, 2. Valve body, 3. Pressure chamber, 4. Rubber tube, 5. Injection nozzle, 6. Central reinforcement, 7. Lateral reinforcement, 8. Elastic sealing body, 9. Extension part, 10, neoprene rubber layer, 11, EPDM rubber layer, 12, elastic stretching zone.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1-3, the present invention provides a technical solution: a pinch valve, including a valve body 2, the internal pressure of the valve body 2 is a rubber tube 4, and a pressure chamber 3 is formed between the valve body 2 and the rubber tube 4, The two ports of the valve body 2 are fixedly connected with the end cap 1, and the valve body 2 is provided with an injection nozzle 5, through which the medium is injected into the pressure chamber 3, and the rubber tube 4 is deformed after the pressure chamber is filled;

The two ends and the center of the rubber tube 4 are respectively provided with a lateral reinforcing body 7 and a central reinforcing body 6, and two elastic stretch zones 12 are formed between the central reinforcing body 6 and the lateral reinforcing body 7. 6. Two elastic stretching regions 12 are formed, and then the two elastic stretching regions 12 are deformed and closed during deformation, and the double closed ports form a complete closing effect. The first closed port bears the impact strength of the liquid flow direction, and the pressure of the liquid flowing in the pipe is greater than When the pressure in the pressure chamber 3 causes leakage at the first closed port, the second closed port is closed to stop the flow of residual liquid, achieving a perfect closing effect;

The inner wall of the rubber tube 4 is cross-linked with a neoprene layer 10, and neoprene is used to enhance the cold resistance, corrosion resistance and water resistance of the rubber tube 4, and the inner wall of the neoprene layer 10 is cross-linked with EPDM rubber. Layer 11 uses EPDM rubber to enhance the mechanical properties of the rubber tube, thereby enhancing the durability of the rubber tube 4 as a whole;

Both ends of the pressure chamber 3 are provided with an elastic sealing body 8, the elastic sealing body 8 is clamped on the valve body 2, and the upper and lower sides are in contact with the inner wall of the valve body 2 and the outer wall of the rubber tube 4 respectively. Finally, when the deformation of the elastic stretching zone 12 is pressed, the elastic sealing body 8 is stamped at the same time, and the elastic sealing body 8 is pressed and deformed to tightly press the two ends of the rubber tube 4. With this design, the maximum pressure in the pressure chamber 3 can be The elastic sealing body 8 presses the rubber tube 4 to the greatest extent to enhance the fixing effect on the rubber tube 4 and prevent its displacement;

The contact surface of the elastic sealing body 8 and the rubber tube 4 is a tooth structure, and the tightness and anti-displacement of the two contact surfaces are enhanced by designing the tooth structure;

The rubber tube 4 is a cylindrical structure, and the lateral reinforcing body 7 at both ends is in the shape of a bell mouth outward. The inner side of the central opening of the end cover 1 is provided with an extension part 9, and the lateral reinforcing body 7 and the extending part 9 fit together. , using this design to increase the fixed surface of the two ports of the rubber tube 4, and after the two elastic stretching regions 12 are closed, the shape close to the mouth of the tube will not be stretched excessively, which is convenient for closing and improves the sealing effect after closing;

The central reinforcing body 6 is ring-shaped, embedded in the rubber tube 4, and the inner diameter of the central reinforcing body 6 is the same as the inner diameter of the rubber tube 4;

The injection nozzle 5 is located at the center of the valve body 2 .

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (6)

1. A pinch valve, comprising a valve body 2, the internal pressure of the valve body 2 is an inherent rubber tube 4, and a pressure chamber 3 is formed between the valve body 2 and the rubber tube 4, and the two ports of the valve body 2 are fixed. The end cover 1 is connected, and the valve body 2 is provided with an injection nozzle 5, which is characterized in that: The two ends and the center of the rubber tube 4 are respectively provided with a lateral reinforcing body 7 and a central reinforcing body 6, and two elastic stretch zones 12 are formed between the central reinforcing body 6 and the lateral reinforcing body 7; The inner wall of the rubber tube 4 is cross-linked with a neoprene layer 10 , and the inner wall of the neoprene layer 10 is cross-linked with an EPDM rubber layer 11 . 2. A pinch valve according to claim 1, characterized in that: both ends of the pressure chamber 3 are provided with an elastic sealing body 8, and the elastic sealing body 8 is clamped on the valve body 2, and The upper and lower surfaces are in contact with the inner wall of the valve body 2 and the outer wall of the rubber tube 4 respectively. 3. A pinch valve according to claim 1, characterized in that: the contact surface between the elastic sealing body 8 and the rubber tube 4 is a tooth structure. 4. A pinch valve according to claim 1, characterized in that: the rubber tube 4 is a cylindrical structure, and the lateral reinforcing body 7 at both ends of the tube is in the shape of an outward bell mouth, and the end cap 1 An extension part 9 is provided inside the central opening of the body, and the side reinforcement 7 is attached to the extension part 9 . 5. A pinch valve according to claim 1, characterized in that: the middle reinforcing body 6 is ring-shaped and embedded in the rubber tube 4, and the inner diameter of the middle reinforcing body 6 is the same as the inner diameter of the rubber tube 4 same. 6 . A pinch valve according to claim 1 , wherein the injection nozzle 5 is located at the center of the valve body 2 .