阅读说明：本技术 夹管阀 (Pinch valve ) 是由 石志超 许鑫 王峰 郭正柔 熊建敏 谢俊锋 于 2018-10-19 设计创作，主要内容包括：本发明提供了一种夹管阀,包括：座体,座体具有容纳至少一部分柔性管的腔体,且腔体的内壁与柔性管之间形成调压区；调压机构,调压机构通过改变调压区中的压力使得柔性管外的压力小于或等于柔性管内的压力。本发明解决了现有技术中的夹管阀负压吸料输送时软管无法正常输送物料的问题。(The invention provides a pinch valve comprising: the seat body is provided with a cavity for accommodating at least one part of the flexible pipe, and a pressure adjusting area is formed between the inner wall of the cavity and the flexible pipe; and the pressure regulating mechanism enables the pressure outside the flexible pipe to be less than or equal to the pressure inside the flexible pipe by changing the pressure in the pressure regulating area. The invention solves the problem that the hose can not normally convey materials when the pinch valve negative pressure material suction conveying in the prior art.)

1. A pinch valve, comprising:

the flexible pipe joint comprises a seat body (10), wherein the seat body (10) is provided with a cavity for accommodating at least one part of a flexible pipe (20), and a pressure adjusting area (11) is formed between the inner wall of the cavity and the flexible pipe (20);

a pressure regulating mechanism (30), the pressure regulating mechanism (30) balancing the pressure outside the flexible pipe (20) with the pressure inside the flexible pipe (20) by changing the pressure in the pressure regulating region (11);

the pressure regulating mechanism (30) further comprises:

a first branch passage (313), one end of the first branch passage (313) being communicated with the pressure adjusting area (11);

a second branch channel (312), one end of the second branch channel (312) being in communication with the flexible tube (20);

at least one check valve structure (32), the check valve structure (32) is arranged at the first branch channel (313), the check valve structure (32) is closed when positive pressure is introduced, and the check valve structure (32) is opened when negative pressure is introduced.

2. Pinch valve according to claim 1, characterized in that the one-way valve arrangement (32) comprises:

a first stopper ring (321), the first stopper ring (321) having a first through hole;

a second retainer ring (322), the second retainer ring (322) being disposed farther from the pressure-adjusting area (11) than the first retainer ring (321), an edge of the second retainer ring (322) having a via hole;

the switch ball (323) is movably arranged between the first retaining ring (321) and the second retaining ring (322), when positive pressure is introduced, the switch ball (323) moves towards the direction close to the first retaining ring (321) to block the first through hole, so that the pressure adjusting area (11) is closed, and when negative pressure is introduced, the switch ball (323) moves towards the direction close to the second retaining ring (322) to avoid the first through hole, so that the pressure adjusting area (11) is opened.

3. Pinch valve according to claim 2, characterized in that the second collar (322) has a second through hole, which is arranged coaxially with the first through hole.

4. Pinch valve according to claim 1, characterized in that the flexible tube (20) and the pressure regulating area (11) share one air source.

5. The pinch valve according to claim 1, characterized in that it further comprises a clamping mechanism (40), at least a portion of the clamping mechanism (40) being connected with the seat (10), the clamping mechanism (40) being capable of squeezing the flexible tube (20) to open or close the flexible tube (20), at least a portion of the clamping mechanism (40) and at least a portion of the flexible tube (20) being located within the cavity, and the pressure regulating zones (11) being arranged consecutively in a circumferential direction of the flexible tube (20).

6. Pinch valve according to claim 1, characterized in that the pressure adjusting zone (11) has an inlet section (12), the inlet section (12) communicating with the outer surface of the seat (10) for varying the pressure in the pressure adjusting zone (11) through the inlet section (12).

7. The pinch valve according to claim 6, wherein the pressure regulating mechanism (30) further comprises a connection joint (36), the connection joint (36) is provided with a pressure regulating channel communicated with the inlet section (12), the connection joint (36) is connected with the seat body (10) in a sealing way, and negative pressure is introduced into the pressure regulating area (11) through the pressure regulating channel.

8. Pinch valve according to claim 1, characterized in that the pressure regulating mechanism (30) further comprises a pipe connection (31), the pipe connection (31) comprising:

a main channel (311);

the first branch channel (313);

the two ends of the second branch channel (312) are respectively communicated with the main channel (311) and the flexible pipe (20), the two ends of the first branch channel (313) are respectively communicated with the main channel (311) and the pressure regulating area (11), and pressure is simultaneously introduced into the flexible pipe (20) and the pressure regulating area (11) through the main channel (311), so that the internal pressure and the external pressure of the flexible pipe (20) are balanced.

9. The pinch valve according to claim 8, wherein the pressure regulating mechanism (30) further comprises a connection joint (36), the connection joint (36) has a pressure regulating passage communicated with the pressure regulating area (11), the connection joint (36) is connected with the seat body (10) in a sealing way, negative pressure is introduced into the pressure regulating area (11) through the pressure regulating passage, the pressure regulating mechanism (30) further comprises a second connection pipe (33), and the connection joint (36) is connected with the pipe joint (31) through the second connection pipe (33).

10. Pinch valve according to claim 9, characterized in that the pressure regulating mechanism (30) further comprises at least two sealing joints (34), the sealing joints (34) being connected with the flexible tube (20) and having a flow through channel communicating with the flexible tube (20), the sealing joints (34) being sealingly connected with the housing (10) for sealing the pressure regulating area (11).

11. Pinch valve according to claim 10, characterized in that the pressure regulating mechanism (30) further comprises a first connection tube (35), the connection between the sealing joint (34) and the pipe joint (31) being through the first connection tube (35).

Technical Field

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

Background

The pinch valve is used for pinching a tube to control the on-off of a pipeline, and due to the wall thickness and hardness of a silica gel hose in the conventional pinch valve, if the silica gel hose with large wall thickness or high hardness is selected, the required driving force of the pinch valve is large, so that a driving cylinder is large and cannot be driven by electromagnetism; if the wall thickness is little or the silica gel hose that the hardness is low, then required double-layered pipe drive power is little, and optional small-size cylinder or use electromagnetic drive, but when the negative pressure was inhaled the material and is carried, the double-layered pipe valve open state, intraductal negative pressure can inhale the silica gel hose flat, leads to the pipeline jam, unable normal transport material.

Disclosure of Invention

The invention mainly aims to provide a pinch valve to solve the problem that a hose cannot normally convey materials when the pinch valve in the prior art sucks the materials under negative pressure.

In order to achieve the above object, the present invention provides a pinch valve comprising: the seat body is provided with a cavity for accommodating at least one part of the flexible pipe, and a pressure adjusting area is formed between the inner wall of the cavity and the flexible pipe; and the pressure regulating mechanism enables the pressure outside the flexible pipe to be less than or equal to the pressure inside the flexible pipe by changing the pressure in the pressure regulating area.

Further, the pinch valve further comprises a clamping mechanism, at least one part of the clamping mechanism is connected with the base body, the clamping mechanism can extrude the flexible pipe to enable the flexible pipe to be opened or closed, at least one part of the clamping mechanism and at least one part of the flexible pipe are located in the cavity, and the pressure regulating area is continuously arranged along the circumferential direction of the flexible pipe.

Further, the pressure regulating region has an inlet section that communicates with the outer surface of the housing to vary the pressure in the pressure regulating region through the inlet section.

Furthermore, the pressure regulating mechanism also comprises a connecting joint, the connecting joint is provided with a pressure regulating channel communicated with the inlet section, the connecting joint is hermetically connected with the seat body, and negative pressure is introduced into the pressure regulating area through the pressure regulating channel.

Further, the pinch valve further comprises a pipe joint, and the pipe joint further comprises: a main channel; the two ends of the first branch channel are respectively communicated with the main channel and the pressure regulating channel; the two ends of the first branch channel are communicated with the main channel and the pressure regulating area respectively, and pressure is communicated to the flexible pipe and the pressure regulating area through the main channel simultaneously, so that the internal pressure and the external pressure of the flexible pipe are balanced.

Further, the pressure regulating mechanism further comprises at least one-way valve structure, the one-way valve structure is arranged at one or more positions of the first branch channel, the pressure regulating channel or the inlet section, the one-way valve structure is closed when the main channel is filled with positive pressure, and the one-way valve structure is opened when the main channel is filled with negative pressure.

Further, the check valve structure includes: the first baffle ring is provided with a first through hole; the second retaining ring is arranged closer to the main channel than the first retaining ring, and a through hole is formed in the edge of the second retaining ring; the switch ball, the activity of switch ball sets up between first fender ring and second fender ring, and when the main entrance let in the malleation, the switch ball moves with the first through-hole of shutoff to the direction that is close to first fender ring for the pressure regulating district is closed, and when the main entrance let in the negative pressure, the switch ball moves to the direction that is close to the second fender ring, in order to dodge first through-hole, makes the pressure regulating district open.

Furthermore, the second baffle ring is provided with a second through hole, and the second through hole and the first through hole are coaxially arranged.

Furthermore, the pressure regulating mechanism also comprises a second connecting pipe, and the connecting joint is connected with the pipe joint through the second connecting pipe.

Further, the pressure regulating mechanism also comprises at least two sealing joints, the sealing joints are connected with the flexible pipe and provided with overflowing channels communicated with the flexible pipe, and the sealing joints are connected with the seat body in a sealing mode so as to seal the pressure regulating area.

Furthermore, the pressure regulating mechanism also comprises a first connecting pipe, and the sealing joint is connected with the pipe joint through the first connecting pipe.

By applying the technical scheme of the invention, the pressure regulating area is formed between the inner wall of the cavity and the flexible pipe, and the pressure in the pressure regulating area is regulated by the pressure regulating mechanism, so that the pressure outside the flexible pipe is less than or equal to the pressure inside the flexible pipe, and the problem of blockage of the flexible pipe caused by suction and flattening of the flexible pipe is avoided when the flexible pipe is subjected to negative pressure suction conveying, and the normal conveying of materials by the flexible pipe is ensured.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 shows a schematic view of the configuration of the pinch valve inlet section connecting the feed end of the present invention;

figure 2 shows a schematic of the configuration of the pinch valve inlet section of the present invention without the feed end attached.

Wherein the figures include the following reference numerals:

10. a base body; 11. a pressure adjusting area; 12. an inlet section; 20. a flexible tube; 30. a pressure regulating mechanism; 31. a pipe joint; 311. a main channel; 312. a second branch channel; 313. a first branch channel; 32. a one-way valve structure; 321. a first retainer ring; 322. a second retainer ring; 323. a switch ball; 33. a second connecting pipe; 34. sealing the joint; 35. a first connecting pipe; 36. connecting a joint; 40. a clamping mechanism.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that, unless otherwise indicated, 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 application belongs.

In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.

The invention provides a pinch valve, aiming at solving the problem that a hose cannot normally convey materials when the pinch valve sucks materials under negative pressure in the prior art.

A pinch valve as shown in fig. 1 comprises a seat body 10, a pressure regulating mechanism 30 and a clamping mechanism 40, wherein the seat body 10 is provided with a cavity for accommodating at least a part of a flexible pipe 20, and a pressure regulating area 11 is formed between the inner wall of the cavity and the flexible pipe 20; the pressure regulating mechanism 30 makes the pressure outside the flexible tube 20 less than or equal to the pressure inside the flexible tube 20 by changing the pressure in the pressure regulating region 11.

In the embodiment, the pressure adjusting region 11 is formed between the inner wall of the cavity and the flexible pipe 20, and the pressure adjusting mechanism 30 is used for adjusting the pressure in the pressure adjusting region 11, so that the pressure outside the flexible pipe 20 is less than or equal to the pressure inside the flexible pipe 20, and therefore when the flexible pipe 20 is subjected to negative pressure suction conveying, the problem that the flexible pipe 20 is blocked due to the fact that the flexible pipe 20 is sucked to be flat is avoided, and the flexible pipe 20 is guaranteed to normally convey materials.

In this embodiment, the pinch valve further comprises a clamping mechanism 40, at least a portion of the clamping mechanism 40 is connected to the housing 10, and the clamping mechanism 40 can press the flexible tube 20 to open or close the flexible tube 20.

In this embodiment, the pressing end of the clamping mechanism 40 and the flexible tube 20 are located in the cavity, the pressure adjusting area 11 is continuously arranged along the circumference of the flexible tube 20, and the distance between the flexible tube 20 and the inner wall of the cavity is not too small, so as to ensure that the outer side of the flexible tube 20 can be uniformly pressed.

In this embodiment, pressure regulating region 11 has inlet section 12, inlet section 12 communicates with the surface of pedestal 10, and pressure regulating region 11 only has inlet section 12 to communicate with the external world, a pressure for changing pressure regulating region 11, other parts are sealed, in order to guarantee the stability of the pressure of pressure regulating region 11, avoid pressure leakage, pressure regulating mechanism 30 still includes attach fitting 36, attach fitting 36 has the pressure regulating passageway, attach fitting 36 sets up at the tip of inlet section 12 and with pedestal 10 sealing connection, in order to avoid pressure leakage, and let in the negative pressure to pressure regulating region 11 through the pressure regulating passageway, thereby change the pressure in pressure regulating region 11.

As shown in fig. 1, the pressure regulating mechanism 30 includes a pipe joint 31, the pipe joint 31 includes a main passage 311, a first branch passage 313 and a second branch passage 312, and both ends of the second branch passage 312 are respectively communicated with the main passage 311 and the flexible pipe 20; both ends of the first branch passage 313 are respectively communicated with the main passage 311 and the pressure regulating passage, and pressure is simultaneously introduced into the flexible pipe 20 and the pressure regulating region 11 through the main passage 311, so that the internal pressure and the external pressure of the flexible pipe 20 are balanced. The pipe joint 31 is of a split structure, the flexible pipe 20 is communicated with the pressure adjusting area 11 through the pipe joint 31, so that a gas source for supplying pressure to the flexible pipe 20 can be used for supplying pressure to the pressure adjusting area 11, the gas source does not need to be additionally arranged, the pressure is convenient to adjust, the pressure of the flexible pipe 20 and the pressure adjusting area 11 can be adjusted simultaneously only by adjusting one gas source, and the pressure of the flexible pipe 20 and the pressure adjusting area 11 can be kept the same.

Of course, the pinch valve may not be provided with the pipe joint 31, that is, the inlet section 12 is not connected to the feeding end, as shown in fig. 2, and directly communicates with the inlet section 12 or the connection joint 36 through an external device such as a pressure generator, and the negative pressure is directly introduced into the pressure regulating region 11 to regulate the pressure of the pressure regulating region 11.

In this embodiment, the pressure regulating mechanism 30 further includes at least one check valve structure 32, and the check valve structure 32 is provided at one or more of the first branch passage 313, the pressure regulating passage, or the inlet section 12, and the check valve structure 32 is closed when the main passage 311 is charged with positive pressure, and the check valve structure 32 is opened when the main passage 311 is charged with negative pressure.

Specifically, the check valve structure 32 of the present embodiment is disposed in the first branch passage 313, the check valve structure 32 includes a first stopper ring 321, a second stopper ring 322, and a switching ball 323, the first stopper ring 321 having a first through hole; the second retaining ring 322 is arranged closer to the main channel 311 than the first retaining ring 321, and a via hole is formed in the edge of the second retaining ring 322; the switch ball 323 is movably arranged between the first retaining ring 321 and the second retaining ring 322, when the main channel 311 is charged with positive pressure, the switch ball 323 moves in the direction close to the first retaining ring 321 to seal the first through hole, but the via hole is not sealed, so that the first branch channel 313 is closed, the pressure regulating area 11 is also closed, the pressure in the pressure regulating area does not change, when the main channel 311 is charged with negative pressure, the switch ball 323 moves in the direction close to the second retaining ring 322 to avoid the first through hole, and the via hole is not sealed at the same time, so that the first branch channel 313 is opened, the pressure regulating area 11 is also opened, and gas can be charged in the pressure regulating area 11 to regulate the pressure. Above-mentioned mode of setting up makes when the material is carried to flexible tube 20 malleation, gas only can be through flexible tube 20 and can't enter into pressure regulating district 11, avoid the material to blow in pressure regulating district 11, cause the rotten condition of material deposit in pressure regulating district 11, and when flexible tube 20 negative pressure carried the material, gas can enter into pressure regulating district 11, thereby change the pressure in pressure regulating district 11, make the shape of flexible tube 20 remain stable, owing to let in the negative pressure and absorb the material this moment, therefore the material also can not enter into in pressure regulating district 11.

Optionally, the second retaining ring 322 has a second through hole, the second through hole is coaxial with the first through hole, and the diameters of the first through hole and the second through hole are smaller than the diameter of the switch ball 323. When the switch ball 323 moves in a direction approaching the second stopper 322, the switch ball 323 is caught at the second through hole, so that the position of the switch ball 323 is stabilized. The second through hole and the via hole are not communicated with each other, and because the second through hole is arranged at the center of the second retainer ring 322, and the via hole is arranged at the edge, it is ensured that the switch ball 323 cannot affect the via hole, so that the gas can always pass through the via hole.

Further optionally, at least two of the through holes are spaced along the circumference of the second retainer 322 to increase the gas throughput.

Optionally, the pressure regulating mechanism 30 further includes a second connection pipe 33, and the connection joint 36 is connected to the pipe joint 31 through the second connection pipe 33. The second connecting pipe 33 makes the connecting joint 36 and the pipe joint 31 unnecessary to be installed together, and can be remotely connected according to actual conditions, thereby improving the convenience of using the pinch valve.

In this embodiment, the pressure regulating mechanism 30 further includes at least two sealing joints 34, the sealing joints 34 are connected to the flexible pipe 20 and have flow passage channels communicated with the flexible pipe 20, and the sealing joints 34 are sealingly connected to the housing body 10 to seal the pressure regulating area 11.

Specifically, the flexible tube 20 in this embodiment is completely accommodated in the cavity, two ends of the flexible tube 20 are respectively connected to one sealing joint 34, the sealing joint 34 is connected to the seat body 10 through a sealing member, so that only the inlet section 12 of the cavity is communicated with the outside, the sealing performance of the cavity is ensured, a part of the sealing joint 34 extends into the cavity, and the end of the part has a sleeve structure, the end of the flexible tube 20 is sleeved on the outer side of the sleeve structure, so that the flexible tube 20 can be connected to the sealing joint 34, and the diameter of the sleeve structure can be set according to the diameter of the flexible tube 20, so that the flexible tube 20 is tightly matched with the sealing joint 34, and the flexible tube is prevented from falling off.

Similar to the second connection pipe 33, the pressure regulating mechanism 30 further includes a first connection pipe 35, and the sealing joint 34 is connected to the pipe joint 31 through the first connection pipe 35, so as to improve convenience in use of the pinch valve.

In the embodiment, the flexible pipe 20 is the flexible pipe 20 with a soft and thin pipe wall, so as to reduce the driving force required by the clamping mechanism 40, thereby reducing the overall volume of the pinch valve, and due to the arrangement of the pressure adjusting area 11 and the adjusting mechanism, even if the pipe wall of the flexible pipe 20 is soft and thin, the flexible pipe 20 can be ensured not to deform and cause blockage during negative pressure material suction.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

1. the problem that the hose can not normally convey materials when the pinch valve sucks the materials under negative pressure in the prior art is solved;

2. the pressure adjusting area and the adjusting mechanism are arranged, so that the shape stability of the flexible pipe is ensured, and the blockage caused by deformation is avoided;

3. the pipe joint is convenient for adjusting the pressure of the pressure adjusting area, and is convenient for operation and control;

4. the check valve structure can prevent positive pressure gas, and avoid the material to be blown into the pressure regulating area and cause long-term accumulation and deterioration.

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.