Pinch valve

Abstract

The pinch valve comprises a shell, an opening is formed in one side of the shell, and a channel is formed in one side of the shell; the at least one compressible pipeline is arranged on the shell, and at least part of the compressible pipeline is arranged in the channel; the driving mechanism is mounted on the shell; the moving part is in transmission connection with the driving mechanism, at least one extrusion element is arranged on the moving part, and the extrusion element and the channel are arranged correspondingly; the driving mechanism is configured to drive the moving part to move and drive the moving part to enter the shell from the opening, so that the extrusion element extrudes the pipeline located in the channel to achieve pipeline on-off control, and the pinch valve can improve the fluid control reliability and efficiency and prevent the pipeline from being damaged due to long-term extrusion.

Description

Technical Field

[0001] This utility model relates to the field of fluid flow control technology, specifically to a pinch valve. Background Technology

[0002] Traditional normally open clamp valves generally use electromagnets as the core driving element. The magnetic force generated by energizing the electromagnet drives the clamping mechanism to mechanically compress the pipeline, thus achieving pipeline closure control. In this design, the electromagnet needs to be continuously energized in the closed state to maintain the clamping force, resulting in significant energy consumption. Actual measurement data shows that the power consumption of a conventional electromagnet module can reach 25-35W under steady-state clamping conditions, and as the ambient temperature rises, the increased coil resistance further exacerbates energy loss. The coil temperature rise caused by continuous energization is particularly prominent; after two hours of continuous operation, the electromagnet surface temperature can rise above 80℃. This not only accelerates the aging of the insulation material but may also cause changes in the magnetic gap due to thermal expansion, resulting in fluctuations in clamping force or even accidental release.

[0003] The functionality of such pinch valves is highly dependent on the dimensional stability of the mechanical structure, posing significant reliability risks. During long-term, high-frequency operation, micron-level wear of the transmission components gradually alters the movement trajectory of the clamping mechanism, causing the compressed area of ​​the pipeline to deviate from its designed position. This leads to localized stress concentration, severely limiting the durability of the valve's sealing performance. Utility Model Content

[0004] Based on the above description, this utility model provides a pinch valve to solve the aforementioned technical problems caused by using an electromagnet design to achieve pinch valve closure in the prior art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] A pinch valve, comprising:

[0007] The outer casing has an opening and a channel formed on one side;

[0008] At least one compressible conduit is disposed on the housing, and at least a portion of the compressible conduit is disposed within the channel;

[0009] The drive mechanism is mounted on the housing;

[0010] A movable component that is driven by the drive mechanism, the movable component being provided with at least one extrusion element, the extrusion element being provided correspondingly to the channel;

[0011] The drive mechanism is configured to drive the moving member to move, causing the moving member to enter the housing from the opening, so that the extrusion element extrudes the pipeline located in the channel to achieve pipeline on / off control.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0013] The pinch valve of this application significantly improves the reliability and efficiency of fluid control through innovative design. It adopts a channel-guided extrusion mechanism, which precisely controls the axial displacement of the moving part through a drive mechanism, so that the extrusion element uniformly extrudes the pipe embedded in the channel along a predetermined path. When not in use for a long time, the extrusion element can be controlled not to extrude the pipe, preventing the pipe from being compressed for a long time without returning to a normal state.

[0014] Based on the above technical solution, the present invention can be further improved as follows.

[0015] Furthermore, the drive mechanism includes a lead screw motor and a matching lead screw nut, wherein the lead screw of the lead screw motor is arranged along the extension direction of the channel, and the moving part is fixedly connected to the lead screw nut.

[0016] Furthermore, the drive mechanism includes a linear motor, the mover of which is rigidly connected to the moving member via a connecting arm, and the movement direction of the mover is parallel to the extension direction of the channel.

[0017] Furthermore, the driving mechanism includes a hydraulic drive cylinder or a pneumatic drive cylinder, the piston rod end of the hydraulic drive cylinder or the pneumatic drive cylinder is fixed to the moving part, and the movement direction of the piston rod is consistent with the extension direction of the channel.

[0018] Furthermore, the extrusion element is a roller, which is rotatably disposed on the outer edge of the moving part. The rotation axis of the roller is perpendicular to the extension direction of the channel. The inner wall of the channel is provided with a guide groove that matches the contour of the roller. The portion of the compressible pipeline built into the channel is located in the guide groove. The compressible pipeline and the guide groove are arranged perpendicularly.

[0019] Furthermore, the outer casing is provided with multiple pairs of independent compressible pipes, and the moving part includes extrusion elements that match the number of channels, with each extrusion element corresponding to one of the channels.

[0020] Furthermore, multiple independent pairs of compressible tubing are distributed on the outer casing along the extension direction of the channel.

[0021] Furthermore, it also includes multiple position feedback modules corresponding one-to-one with each pair of the compressible pipes, used to provide real-time feedback on the position of the moving part within the housing.

[0022] Furthermore, the position feedback module includes a photoelectric sensor disposed inside the housing. The photoelectric sensor is disposed corresponding to the extrusion element. When the moving part moves to any pair of compressible pipes, any other extrusion element that is not involved in the extrusion blocks the light path of the photoelectric sensor to generate a position signal. Attached Figure Description

[0023] Figure 1 This is an assembly diagram of an embodiment of this application;

[0024] Figure 2 This is a disassembly diagram of an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the shell structure in an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the moving part and the extrusion element in the embodiments of this application. Detailed Implementation

[0027] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0028] Unless otherwise defined, 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. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0029] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "under" or "below" of other elements or features will be oriented "over" of other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0030] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0031] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0032] This utility model provides a pinch valve, such as Figures 1-4 As shown, it includes a housing 1, a compressible pipeline 2, a drive mechanism 3, a moving part 4, and a pressing element 5. The specific structure and working principle of the housing 1, the compressible pipeline 2, the drive mechanism 3, the moving part 4, and the pressing element 5 will be described in detail below with reference to the accompanying drawings.

[0033] The outer shell 1 is the main structure of the pinch valve, and its material can be aluminum alloy, stainless steel, or other materials with good mechanical strength and corrosion resistance. An opening 11 is provided on one side of the outer shell 1 to facilitate the entry and exit of the moving part 4, and a channel 12 is formed inside to accommodate the compressible pipe 2 and the squeezing element 5, ensuring that the squeezing element 5 can accurately align and squeeze the compressible pipe 2.

[0034] The compressible conduit 2 serves as a fluid transmission channel and can be made of materials with good elasticity and corrosion resistance, such as silicone tubing, rubber tubing, or plastic tubing. These conduits can adapt to different fluid media and effectively control the flow of fluid when compressed. The compressible conduit 2 is mounted on the housing 1 and is at least partially located within the channel 12 to facilitate compression control by the compressed element 5.

[0035] Preferably, a groove 13 for mounting the compressible pipe 2 is formed on the outside of the housing 1, and the inside of the groove 13 is in communication with the channel 12.

[0036] The drive mechanism 3 is mounted on the housing 1 and is connected to the moving part 4 for transmission, and is used to drive the moving part 4 to move along the extension direction of the channel 12. The drive mechanism 3 can take various forms, such as a lead screw and nut pair, a linear motor, or a hydraulic / pneumatic drive cylinder, to achieve precise control of the moving part 4.

[0037] In one embodiment, such as Figure 2As shown, the drive mechanism 3 includes a lead screw motor 31 and a matching lead screw nut 32. The lead screw 311 of the lead screw motor 31 is arranged along the extension direction of the channel 12, and the moving part 4 is fixedly connected to the lead screw nut 32. By rotating the lead screw motor 31, the lead screw nut 32 is driven to move along the lead screw 311, thereby realizing the precise movement of the moving part 4 along the extension direction of the channel 12, and thus achieving precise compression control of the pipeline. This lead screw and nut pair structure can provide high-precision displacement control, ensure the stable movement of the moving part 4, and improve the control accuracy and reliability of the clamp valve.

[0038] In other embodiments, the drive mechanism 3 may also employ a linear motor or a hydraulic / pneumatic drive cylinder (not shown in the figure). The mover of the linear motor is rigidly connected to the moving member 4 via a connecting arm, and the movement direction of the mover is parallel to the extension direction of the channel 12. The linear motor can provide stable linear motion, enabling the moving member 4 to respond quickly to the action of the drive mechanism and improving the timeliness of pipeline control. The piston rod end of the hydraulic or pneumatic drive cylinder is fixed to the moving member 4, and the movement direction of the piston rod is consistent with the extension direction of the channel 12. Using a hydraulic or pneumatic drive cylinder can achieve a larger thrust, making it suitable for pipeline control scenarios requiring greater extrusion force.

[0039] At least one extrusion element 5 is provided on the movable component 4, and the extrusion element 5 is correspondingly arranged with the channel 12. The extrusion element 5 can be a roller 51, which is rotatably disposed on the outer edge of the movable component 4, and its rotation axis is perpendicular to the extension direction of the channel 12. In a more preferred embodiment, the inner wall of the channel 12 is provided with a guide groove 121 that matches the contour of the roller 51. The portion of the compressible pipe 2 built into the channel 12 is located within the guide groove 121, and the compressible pipe 2 is arranged perpendicularly to the guide groove 121. During the extrusion process, the roller 51 can roll along the guide groove 121, reducing friction, improving the service life of the extrusion element and the pipe, and ensuring the uniformity of extrusion.

[0040] The outer casing 1 may be provided with multiple pairs of independent compressible pipes 2. The moving part 4 includes extrusion elements 5 matching the number of channels 12. The extrusion elements 5 are arranged one-to-one with the channels 12, which can control multiple pairs of pipes simultaneously, improving the integration and working efficiency of the equipment. The multiple pairs of independent compressible pipes 2 are distributed on the outer casing 1 along the extension direction of the channels 12, which facilitates centralized management and operation and saves space.

[0041] In this embodiment, two pairs of compressible pipes 2 are arranged axially on the outer shell 1. Each pair of compressible pipes 2 is symmetrically arranged on both sides of the outer shell 1. Correspondingly, two pairs of rollers 51 are arranged on the moving part 4 in a cross-symmetrical manner. It can be seen that the moving part 4 is provided with 8 roller mounting slots 41, and a total of 8 rollers can be installed. Therefore, the number of rollers 51 and the number of compressible pipes 2 are not limited in this embodiment.

[0042] Meanwhile, this utility model also includes multiple position feedback modules 6 corresponding one-to-one with each pair of compressible pipes 2, used to provide real-time feedback on the position of the moving part 4 within the housing 1, enabling precise monitoring of the position status of each extrusion element and ensuring the accuracy of pipe control. The position feedback module 6 can employ a photoelectric sensor 61, which is located inside the housing 1, corresponding to the extrusion element 5. When the moving part 4 moves to any pair of compressible pipes 2, the remaining extrusion elements 5 that are not involved in extrusion block the light path of the photoelectric sensor 61, generating a position signal. By controlling the blocking and conduction states of the photoelectric sensor, position signal feedback is achieved simply and reliably.

[0043] This embodiment has at least the following advantages:

[0044] 1. Improved reliability and efficiency of fluid control: Through the innovative design of the pinch valve structure and the adoption of the channel-guided extrusion mechanism, the axial displacement of the moving parts can be precisely controlled, so that the extrusion element can uniformly extrude the pipeline embedded in the channel along a predetermined path, thereby significantly improving the reliability and efficiency of fluid control.

[0045] 2. Prevent long-term compression damage to pipelines: When not in use for a long time, the compression element can be controlled to prevent the pipeline from being compressed, effectively preventing the pipeline from being unable to return to normal due to long-term compression and extending the service life of the pipeline.

[0046] 3. Drive method of lead screw and nut pair: Using lead screw and nut pair as the drive mechanism can achieve high-precision axial displacement control, ensuring that the moving parts move accurately along the extension direction of the channel, thereby realizing precise compression control of the pipeline and improving the accuracy and stability of fluid control.

[0047] 4. Optimized extrusion element design: The extrusion element adopts a roller design and can be equipped with a guide groove structure to reduce friction, improve the service life of the extrusion element and pipeline, and ensure the uniformity of extrusion, further improving the performance and reliability of the pinch valve.

[0048] 5. Multi-pipeline integrated control: The housing can be equipped with multiple pairs of independent compressible pipelines, and the moving parts include extrusion elements that match the number of channels, which can control multiple pairs of pipelines at the same time, improving the integration and working efficiency of the equipment, and is suitable for complex fluid control systems.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pinch valve, characterized in that, include: The outer casing has an opening and a channel formed on one side; At least one compressible conduit is disposed on the housing, and at least a portion of the compressible conduit is disposed within the channel; The drive mechanism is mounted on the housing; A movable component that is driven by the drive mechanism, the movable component being provided with at least one extrusion element, the extrusion element being provided correspondingly to the channel; The drive mechanism is configured to drive the moving member to move, causing the moving member to enter the housing from the opening, so that the extrusion element extrudes the pipeline located in the channel to achieve pipeline on / off control.

2. The pinch valve according to claim 1, characterized in that, The drive mechanism includes a lead screw motor and a matching lead screw nut. The lead screw of the lead screw motor is arranged along the extension direction of the channel, and the moving part is fixedly connected to the lead screw nut.

3. The pinch valve according to claim 1, characterized in that, The drive mechanism includes a linear motor, the mover of which is rigidly connected to the moving part via a connecting arm, and the movement direction of the mover is parallel to the extension direction of the channel.

4. The pinch valve according to claim 1, characterized in that, The driving mechanism includes a hydraulic drive cylinder or a pneumatic drive cylinder. The piston rod end of the hydraulic drive cylinder or the pneumatic drive cylinder is fixed to the moving part, and the movement direction of the piston rod is consistent with the extension direction of the channel.

5. The pinch valve according to any one of claims 1 to 4, characterized in that, The extrusion element is a roller, which is rotatably disposed on the outer edge of the moving part. The rotation axis of the roller is perpendicular to the extension direction of the channel. The inner wall of the channel is provided with a guide groove that matches the contour of the roller. The portion of the compressible pipeline built into the channel is located in the guide groove. The compressible pipeline and the guide groove are arranged perpendicularly.

6. The pinch valve according to claim 5, characterized in that, The outer casing is provided with multiple pairs of independent compressible pipes, and the moving part includes extrusion elements that match the number of channels, with each extrusion element corresponding to one of the channels.

7. The pinch valve according to claim 6, characterized in that, Independent compressible tubing is distributed on the outer casing along the extension direction of the channel.

8. The pinch valve according to claim 6, characterized in that, It also includes multiple position feedback modules corresponding to each pair of the compressible pipes, used to provide real-time feedback on the position of the moving part within the housing.

9. The pinch valve according to claim 8, characterized in that, The position feedback module includes a photoelectric sensor disposed inside the housing. The photoelectric sensor is disposed corresponding to the extrusion element. When the moving part moves to any pair of compressible pipes, any other extrusion element that is not involved in the extrusion blocks the light path of the photoelectric sensor to generate a position signal.

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