CN223782127U - A pinch valve - Google Patents

Abstract

This utility model relates to the field of pneumatic clamp valve technology, and provides a clamp valve including a main valve body, a hose, and a valve body assembly. The hose includes a hose body and outer edges located at both ends of the hose body. The hose body is elastic, and the inner diameter in the middle of the hose body is smaller than the inner diameter at both ends. A pre-compression angle is formed at the connection between the hose body and the outer edges. An inflation cavity is formed between the hose and the inner wall of the main valve body, and the outer edges are fitted to the inner wall of the main valve body. An air nozzle communicating with the inflation cavity is provided on the side wall of the main valve body. The valve body assembly includes a positioning ring and a pressure ring. The positioning ring is sleeved on the outer wall of the hose and is fitted to the inner side of the outer edge. The pressure ring is installed at both ends of the main valve body. This utility model simplifies the internal structure of the main valve body, making product molding and assembly more convenient. For the elastic hose, a pre-compression angle and fixing components are specially designed to ensure the stability of the hose and improve its service life and closing effect.

Description

Pinch valve

Technical Field

The utility model relates to the technical field of pneumatic pinch valves, in particular to a pinch valve.

Background

The existing pneumatic pinch valve structure adopts a large amount of metal structures, and the structure of an air inlet cavity in the main shell where the air inlet is located is complex, which is not beneficial to molding and assembly. The elastic clamping tube is matched with the outer shell body in a prepressing angle mode, the elastic clamping tube needs to be stretched repeatedly to achieve functionality during the working period, and the generated material is high in fatigue and stress damage, so that the service life of the product is short.

Disclosure of utility model

Aiming at the technical problems, the utility model provides a pinch valve, which adopts a pre-pressing angle design and a positioning and fixing assembly, simplifies the internal structure, and can effectively improve the service life and the use effect.

The utility model adopts the following technical scheme for realizing the technical purpose:

A pinch valve comprises a main valve body, a rubber tube and a valve body assembly, wherein the rubber tube comprises a rubber tube main body and outer edges arranged at two ends of the rubber tube main body, the rubber tube main body is elastic, the inner diameter in the middle of the rubber tube main body is smaller than the inner diameter at two ends, a prepressing angle is formed on one section of the joint of the rubber tube main body and the outer edges, an inflatable cavity is formed on the inner side walls of the rubber tube main body and the outer edges are attached to the inner wall of the main valve body, an air tap communicated with the inflatable cavity is arranged on the side wall of the main valve body, the valve body assembly comprises a positioning ring and a pressing ring, the positioning ring is sleeved on the outer side wall of the rubber tube and attached to the inner sides of the positioning ring and the outer edges, and the pressing ring is arranged at two ends of the main valve body.

Preferably, the pre-pressing angle is 30-45 degrees.

Preferably, one end of the pressing ring, which is close to the main valve body, is provided with an annular groove matched with the outer edge.

More preferably, the valve body assembly further comprises an O-ring, and the O-ring is attached to the inner wall of the pressing ring.

More preferably, the valve body assembly further comprises a quick-connect nut, and the quick-connect nut and the clamping ring are detachably mounted through threads.

Preferably, the valve body assembly further comprises a quick-connection claw, and one end of the quick-connection claw can be inserted into the quick-connection nut.

Preferably, the main valve body, the rubber tube and the pressing ring are welded through an ultrasonic process.

Preferably, the positioning ring and the pressing ring are made of plastic materials.

The beneficial effects of the utility model are as follows:

The utility model simplifies the internal structure of the main valve body, makes the product molding and assembly more convenient, and specifically designs the pre-pressing angle and the fixing part aiming at the elastic rubber tube, ensures the stability of the rubber tube, and improves the service life and the closing effect of the rubber tube.

Drawings

FIG. 1 is a longitudinal cross-sectional view of the present utility model;

FIG. 2 is an exploded view of the present utility model;

FIG. 3 is a schematic general construction of the present utility model;

FIG. 4 is a schematic view of the press ring and hose installation of the present utility model;

fig. 5 is a longitudinal cross-sectional view of the hose of the present utility model.

Reference numerals:

1. a main valve body; 2, a rubber tube, 3, a positioning ring, 4, a pressing ring, 5, an O ring, 6, a quick-connection screw cap, 7, a quick-connection claw, 8, an air tap, 9, an annular groove, 10, an outer edge, 11 and a rubber tube main body.

Detailed Description

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper/lower", "front/rear", "inner/outer", "top/bottom", etc. are directions or positional relationships based on the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "configured to," "connected," and the like are to be construed broadly as, for example, "connected" may be fixedly connected, may be detachably connected, or integrally connected, may be mechanically connected or electrically connected, may be directly connected or indirectly connected through an intermediate medium, and may be in communication with the interior of an element of an adapted type. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. In addition, unless specified, the parts adopted in the utility model are all commercial parts, and the connection between different parts can be realized by conventional technical means.

The utility model is described in further detail below with reference to the drawings and the detailed description.

The pinch valve comprises a main valve body 1, a rubber tube 2 and a valve body assembly, wherein the rubber tube 2 comprises a rubber tube main body 11 and outer edges 10 arranged at two ends of the rubber tube main body 11, the side wall of the rubber tube main body 11 is elastic, the inner diameter of the middle of the rubber tube main body 11 is smaller than that of two sides, a prepressing angle is formed at one section of the joint of the rubber tube main body 11 and the outer edges 10, as shown in fig. 5, and angles A and B are prepressing angles;

In actual operation, the small-angle transition design with thin middle and thick two sides can ensure that the two ends of the rubber tube 2 have enough strength, and simultaneously the prepressing angle enables the rubber tube main body 11 to present a corresponding angle when in centripetal stretching, thereby avoiding the pulling of larger stress caused by right angles at the two ends;

An inflatable cavity is formed between the rubber tube 2 and the inner side wall of the main valve body 1, an air tap 8 communicated with the inflatable cavity is arranged on the side wall of the main valve body 1, the valve body assembly comprises a positioning ring 3 and a pressing ring 4, the positioning ring 3 is sleeved on the outer side wall of the rubber tube 2 and is attached to the inner side of the outer edge 10 of the rubber tube 2, the pressing ring 4 is arranged at two ends of the main valve body 1, and the positioning ring 3 and the pressing ring 4 are used for fixing the rubber tube 2 and the main valve body 1 together, so that the fixing effect is ensured.

In this embodiment, as shown in fig. 1 and 4, the positioning ring 3 is attached to the inner side of the outer edge 10, a clamping groove is formed on the inner side walls of the two ends of the main valve body 1, one part of the positioning ring 3 contacts with the outer edge 10, and the other part is clamped in the clamping groove, and the outer diameter of one end of the pressing ring 4, which contacts with the main valve body 1, is the same as the outer diameter of the main valve body 1, so that alignment welding is convenient.

Preferably, the pre-pressing angle is 30-45 degrees.

The whole pressing ring 4 is preferably a pipeline in a bolt shape, the inside of the pressing ring is hollow, the radius of one end is larger than that of the other end, specifically, an annular groove 9 matched with the outer edge 10 of the rubber tube 2 is formed on one end (the relatively larger radius end) of the pressing ring 4 close to the main valve body 1, as shown in fig. 1 and 4, in the production process, the outer edge 10 is arranged in the annular groove 9 of the pressing ring 4, the pressing ring 4 and the end of the main valve body 1 are welded, the outer edge 10 can be fixed through the annular groove 9 and the positioning ring 3, and then the rubber tube 2 and the main valve body 1 are fixed together, and the design can provide larger bearing force for deformation of the tube wall of the rubber tube 2.

More preferably, the valve body assembly further comprises an O-ring 5,O which is attached to the inner wall of the pressing ring 4, and the O-ring is mainly used for sealing between the quick-connection nut 6 and the pressing ring 4.

More preferably, the valve body assembly further comprises a quick-connect nut 6, wherein the quick-connect nut 6 and the clamping ring 4 are detachably mounted through threads.

Preferably, the valve body assembly further comprises a quick-connection claw 7, one end of the quick-connection claw 7 can be inserted into the quick-connection nut 6, and the pressing ring 4 and the quick-connection nut 6 are in threaded engagement, and the quick-connection claw 7 is arranged so that products are easy to form and assemble.

Preferably, the main valve body 1, the rubber tube 2 and the pressing ring 4 are welded by ultrasonic process, and it should be noted that the ultrasonic welding process is only one option, and other connecting processes can be used according to actual requirements in the production process.

Preferably, the positioning ring 3 and the pressing ring 4 are made of plastic materials, so that the overall cost is low and the weight is light.

The assembly mode and the working principle of the utility model are as follows:

The rubber tube 2, the main valve body 1 and the positioning ring 3 are assembled, and the positioning ring 3 is sleeved at two ends of the outer wall of the rubber tube 2, so that the positioning ring 3 is attached to the inner side of the outer edge 10;

The assembled main valve body 1, the positioning ring 3, the rubber tube 2 and the pressing ring 4 are assembled and welded and fixed by utilizing an ultrasonic process, the outer edge 10 of the rubber tube 2 is arranged in the annular groove 9 of the pressing ring 4, and meanwhile, the end part corresponding to the pressing ring 4 is attached to the end part of the main valve body 1 and then welded;

Installing the O-ring 5 at a specified position, rotating the quick-connection nut 6, and screwing the quick-connection nut 6 and the pressing ring 4 together;

Finally, the matched quick-connection claw 7 is inserted into the quick-connection nut 6, so that the whole pipe clamping valve is assembled.

When the rubber tube 2 does not work, the rubber tube is in a straight-through state, and when compressed gas is filled into the inflatable cavity between the rubber tube 2 and the inner side wall of the main valve body 1 through the air tap 8, the tube wall of the rubber tube 2 can deform inwards due to elasticity of the tube wall of the rubber tube 2 and finally contact with each other, so that the closing of the pinch valve is completed, and the purpose of blocking fluid is achieved.

Although embodiments of the present utility model have been described in the specification, these embodiments are presented only, and should not limit the scope of the present utility model. Various omissions, substitutions and changes in the form of examples are intended in the scope of the utility model.

Claims (8)

1. A pinch valve is characterized by comprising a main valve body, a rubber tube and a valve body assembly, wherein the rubber tube comprises a rubber tube main body and outer edges arranged at two ends of the rubber tube main body, the rubber tube main body is elastic, the inner diameter in the middle of the rubber tube main body is smaller than the inner diameter at two ends, a prepressing angle is formed on one section of the joint of the rubber tube main body and the outer edges, an inflatable cavity is formed on the inner side walls of the rubber tube main body, the outer edges are attached to the inner wall of the main valve body, an air tap communicated with the inflatable cavity is arranged on the side wall of the main valve body, the valve body assembly comprises a positioning ring and a pressing ring, the positioning ring is sleeved on the outer side wall of the rubber tube and attached to the inner sides of the positioning ring and the outer edges, and the pressing ring is arranged at two ends of the main valve body.

2. A pinch valve as claimed in claim 1, wherein said pre-compression angle is between 30 ° and 45 °.

3. A pinch valve as claimed in claim 1 wherein said clamping ring is provided with an annular recess adjacent one end of the main valve body which is adapted to fit said outer rim.

4. A pinch valve as set forth in claim 3 wherein said valve body assembly further comprises an O-ring, said O-ring conforming to an inner wall of said pinch ring.

5. A pinch valve as set forth in claim 3 wherein said valve body assembly further comprises a quick-connect nut, said quick-connect nut and said clamping ring being removably mounted by threads.

6. The pinch valve of claim 5, wherein said valve body assembly further comprises a snap-in jaw having one end insertable within an interior of said snap-in nut.

7. A pinch valve as set forth in claim 1 wherein said main valve body, hose and press ring are welded by ultrasonic processes.

8. A pinch valve as claimed in any one of claims 1 to 7 wherein said retainer ring and said hold-down ring are both of plastics material.