A multi-channel position feedback brushless motor screw drive clamp valve

Abstract

This utility model belongs to the field of clamp valve technology and provides a multi-channel position feedback brushless motor screw-driven clamp valve, including: a drive unit, which includes a brushless motor and a reducer, and a lead screw is installed at the output end of the drive unit; a valve body, with a flange installed between the drive unit and the valve body, and a clamping groove is opened on the periphery of the valve body, with a cylindrical pin fixed on the inner wall of the clamping groove; a clamping unit, which includes a piston threaded with the lead screw and a chuck fixed to the bottom end of the piston; and a position feedback circuit. This utility model, by setting up a brushless motor, reducer, valve body, clamping unit and position feedback circuit, and with the precise guidance of the valve body limiting groove and the piston limiting block, achieves stable cooperation between the chuck and the cylindrical pin, which can be adapted to single-channel, dual-channel, four-channel and eight-channel multi-flow path scenarios, meet the requirements of synchronous or group switching control, realize real-time monitoring of valve status and position locking after power failure, and ensure the reliability of flow path opening and closing.

Description

Technical Field

[0001] This utility model belongs to the field of clamp valve technology, specifically a multi-channel position feedback brushless motor screw driven clamp valve. Background Technology

[0002] With the rapid development of the domestic food and beverage industry, a large number of vending machines such as beverage vending machines, milk tea vending machines, and coffee machines have emerged on the streets and in shopping malls. The demand for pinch valves for these devices is constantly evolving: the hoses used are usually large in diameter, the medium often contains particles, and there are specific requirements for flow rate, so pinch valves that can achieve a large opening are needed.

[0003] Currently, the mainstream pinch valves on the market are mainly divided into two categories: spiral solenoid pinch valves and manual pinch valves. Motor-driven pinch valves, however, are still absent from the domestic market. Spiral solenoid pinch valves, with their advantages of simple structure, small size, low cost, easy operation, reliable action, and rapid response, dominate the flow path control of small-diameter, low-hardness pipes. They open and close the valve by controlling the movement of springs and coils. Pneumatic pinch valves, on the other hand, use gas as a power source, providing sufficient clamping force and have an absolute advantage in scenarios where the outer diameter of the pipe is 15.8mm or larger and compressed air supply is permissible.

[0004] Traditional pinch valves rely on electromagnetic coils or compressed air, and their control is limited to a single channel, making it difficult to achieve multi-channel synchronous or group switching functions.

[0005] To address the problems raised in the background art, those skilled in the art have proposed a multi-channel position feedback brushless motor screw drive clamp valve. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model provides a multi-channel position feedback brushless motor screw-driven clamp valve, which solves the problem that existing clamp valves rely on electromagnetic coils or compressed air and are limited to single-channel control.

[0007] A multi-channel position feedback brushless motor screw driven clamp valve includes: a drive unit, which includes a brushless motor and a reducer, and a screw is installed at the output end of the drive unit;

[0008] The valve body has a flange installed between the drive unit and the valve body. A clamping groove is provided on the periphery of the valve body, and a cylindrical pin is fixed to the inner wall of the clamping groove.

[0009] A clamping unit includes a piston threadedly engaged with a lead screw and a chuck fixed to the bottom end of the piston, the position of which corresponds to a cylindrical pin;

[0010] The position feedback circuit includes an electronic limit switch installed in the valve body cavity and a PCBA board electrically connected to the brushless motor. The position feedback circuit outputs an NPN polarity signal and supports power-off position retention.

[0011] Preferably, a limiting groove is formed in the inner cavity of the valve body, a limiting block is fixedly connected to the periphery of the piston, the limiting block slides with the limiting groove, and a wear-resistant ring is installed on the periphery of the valve body.

[0012] Preferably, there are two sets of clamping grooves, which are symmetrically arranged on the periphery of the valve body, forming a double channel, and the cylindrical pin is perpendicular to the two sets of clamping grooves.

[0013] Preferably, there are two sets of clamping grooves, and the two sets of clamping grooves are arranged in a rectangular array around the valve body. The two sets of clamping grooves form a double channel. Two sets of cylindrical pins are fixed to the inner wall of the clamping groove. The two sets of cylindrical pins are respectively fixed to the top surface and the bottom surface of the double channel. A connecting rod is fixedly connected to the bottom surface of the piston. A clamp is installed at the end of the connecting rod. A through groove is formed through the side wall of the connecting rod. The clamp is located in the gap formed by the two sets of cylindrical pins.

[0014] Preferably, there are four sets of clamping grooves, which are symmetrically arranged around the valve body, forming four channels. Two sets of cylindrical pins are fixed to the inner wall of each clamping groove, and the two sets of cylindrical pins are respectively fixed to the top and bottom surfaces of the four channels. A connecting rod is fixedly connected to the bottom surface of the piston, and a clamp is fixed to the end of the connecting rod. A through groove is formed through the side wall of the connecting rod, and the clamp is located in the gap formed by the two sets of cylindrical pins.

[0015] Preferably, there are four sets of clamping grooves, which are arranged in a rectangular array around the valve body, forming four channels. Three sets of cylindrical pins are fixed to the inner wall of the clamping grooves, respectively fixed to the top, middle and bottom surfaces of the four channels. A connecting rod is fixedly connected to the bottom surface of the piston. Two sets of clamps are fixed to the end of the connecting rod. Two sets of through grooves are passed through the side wall of the connecting rod. The two sets of clamps are located in two gaps formed by the separation of the three sets of cylindrical pins.

[0016] Preferably, there are eight sets of clamping grooves, forming eight channels. Three sets of cylindrical pins are fixed to the inner wall of each clamping groove, respectively fixed to the top, middle and bottom surfaces of the eight channels. A connecting rod is fixedly connected to the center of the bottom surface of the piston. Two sets of clamps are fixed to both walls of the connecting rod. Two sets of through grooves are passed through the side wall of the connecting rod. The four sets of clamps are located in two gaps formed by the separation of the three sets of cylindrical pins.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention, by incorporating a brushless motor, reducer, valve body, clamping unit, and position feedback circuit, along with precise guidance from the valve body limiting groove and piston limiting block, achieves stable engagement between the clamp and the cylindrical pin. It is adaptable to multi-flow path scenarios such as single-channel, dual-channel, four-channel, and eight-channel operation, meeting the requirements for synchronous or group switching control. It enables real-time monitoring of valve status and position locking after power failure, ensuring the reliability of flow path on / off. The overall structure is compact, low-power, low-noise, with high clamping force and precise flow regulation, requiring no additional air source. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the first embodiment;

[0020] Figure 2 This is a schematic diagram of the exploded structure of the first embodiment;

[0021] Figure 3 This is a cross-sectional structural diagram of the first embodiment;

[0022] Figure 4 This is a three-dimensional structural diagram of the second embodiment;

[0023] Figure 5 This is a cross-sectional structural diagram of the second embodiment;

[0024] Figure 6 This is a three-dimensional structural diagram of the third embodiment;

[0025] Figure 7 This is a cross-sectional structural diagram of the third embodiment;

[0026] Figure 8 This is a three-dimensional structural diagram of the fourth embodiment;

[0027] Figure 9 This is a schematic diagram of the first cross-sectional structure of the fourth embodiment;

[0028] Figure 10 This is a schematic diagram of the second cross-sectional structure of the fourth embodiment;

[0029] Figure 11 This is a three-dimensional structural diagram of the fifth embodiment;

[0030] Figure 12 This is a cross-sectional structural diagram of the fifth embodiment;

[0031] Figure 13 This is a three-dimensional structural diagram of the sixth embodiment;

[0032] Figure 14 This is a cross-sectional structural diagram of the sixth embodiment.

[0033] In the picture:

[0034] 1. Flange; 2. Brushless motor; 3. Valve body; 301. Clamping groove; 302. Limiting groove; 4. Cylindrical pin; 5. Set screw; 7. Piston; 701. Connecting rod; 702. Through groove; 703. Limiting block; 8. Chuck; 9. Lead screw; 10. Wear ring; 12. PCBA board. Detailed Implementation

[0035] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0036] Example 1: As shown in the attached document Figure 1 To be continued Figure 3 As shown: This utility model provides a multi-channel position feedback brushless motor screw drive clamp valve, including a drive unit, valve body 3, clamping unit and position feedback circuit;

[0037] The drive unit includes a brushless motor 2 and a reducer, and a lead screw 9 is installed at the output end of the drive unit;

[0038] A flange 1 is installed between the drive unit and the valve body 3. A clamping groove 301 is provided on the periphery of the valve body 3. A cylindrical pin 4 is fixed on the inner wall of the clamping groove 301. The cylindrical pin 4 is fixed by a set screw 5.

[0039] The clamping unit includes a piston 7 that is threadedly engaged with the lead screw 9 and a chuck 8 fixed to the bottom end of the piston 7. The position of the chuck 8 corresponds to that of the cylindrical pin 4.

[0040] The position feedback circuit includes an electronic limit switch installed in the inner cavity of the valve body 3, a PCBA board 12 electrically connected to the brushless motor 2, outputs an NPN polarity signal and supports power-off position holding.

[0041] A limiting groove 302 is provided in the inner cavity of the valve body 3, and a limiting block 703 is fixedly connected to the periphery of the piston 7. The limiting block 703 slides with the limiting groove 302, and a wear-resistant ring 10 is installed on the periphery of the valve body 3.

[0042] As can be seen from the above, after the brushless motor 2 is powered on, it drives the lead screw 9 to rotate through the reducer. The lead screw 9 and the piston 7 are threaded together to convert into linear motion. The piston 7 peripheral limit block 703 slides along the limit groove 302 in the inner cavity of the valve body 3 to constrain the stroke. The bottom end clamp 8 of the piston 7 moves down to press the inner tube of the clamping groove 301 to the cylindrical pin 4 to realize the flow path closure (normally closed initial state) or release to realize the opening (normally open initial state).

[0043] PCBA board 12 control logic: When the white / black wires of control line 001 are shorted to ground (GND), the output NPN low level ≤0.7V triggers motor 2 to rotate forward and close the valve. When disconnected, it rotates in reverse and opens the valve. The yellow feedback line is normally open. When the power is off, the piston 7 position is locked. After restarting, it works in the original state.

[0044] Example 2: As shown in the attached document Figure 4 - Appendix Figure 5 As shown, there are two sets of clamping grooves 301. The two sets of clamping grooves 301 are symmetrically opened on the sides of the valve body 3. The two sets of clamping grooves 301 form a double channel. The cylindrical pin 4 is perpendicular to the two sets of clamping grooves 301.

[0045] As can be seen from the above, the brushless motor 2 drives the lead screw 9 to rotate and drive the piston 7 to move down. The bottom clamp 8 of the piston 7 synchronously presses the inner tube of the two symmetrically arranged clamping grooves 301 to the cylindrical pin 4, realizing the synchronous closure of the dual-channel flow path. When reversing, the clamp 8 moves up and the dual channels are opened synchronously. The PCBA board 12 controls the dual-channel status in a unified manner through the control line 001.

[0046] Example 3: As shown in the attached document Figure 6 - Appendix Figure 7 As shown, there are two sets of clamping grooves 301. The two sets of clamping grooves 301 are arranged in a rectangular array around the valve body 3. The two sets of clamping grooves 301 form a double channel. Two sets of cylindrical pins 4 are fixed to the inner wall of the clamping grooves 301. The two sets of cylindrical pins 4 are fixed to the top and bottom surfaces of the double channel, respectively. A connecting rod 701 is fixedly connected to the bottom surface of the piston 7. A chuck 8 is installed at the end of the connecting rod 701. A through groove 702 is passed through the side wall of the connecting rod 701. The chuck 8 is located in the gap formed by the two sets of cylindrical pins 4.

[0047] As can be seen from the above, the end clamp 8 of the connecting rod 701 at the bottom of the piston 7 is driven to move downward by the lead screw 9. The through groove 702 on the side wall of the connecting rod 701 cooperates with the cylindrical pin 4 for guidance. The clamp 8 synchronously squeezes the two sets of clamping grooves 301 pipes distributed in a rectangular array to achieve synchronous closing of the dual channels; and synchronous opening during reversal.

[0048] Example 4: As attached Figure 8 - Appendix Figure 10 As shown, there are four sets of clamping grooves 301, which are symmetrically arranged around the valve body 3. The four sets of clamping grooves 301 form four channels. Two sets of cylindrical pins 4 are fixed to the inner wall of the clamping grooves 301. The two sets of cylindrical pins 4 are fixed to the top and bottom surfaces of the four channels, respectively. A connecting rod 701 is fixedly connected to the bottom surface of the piston 7. A chuck 8 is fixed at the end of the connecting rod 701. A through groove 702 passes through the side wall of the connecting rod 701. The cylindrical pins 4 slide in the through groove 702. The chuck 8 is located in the gap formed by the two sets of cylindrical pins 4.

[0049] As can be seen from the above, the brushless motor 2 drives the lead screw 9 to rotate, causing the piston 7 to move downward. The single chuck 8 at the end of the connecting rod 701 at the bottom of the piston 7 moves synchronously: the bottom surface of the chuck 8 presses the pipes in the two sets of clamping grooves 301 below to abut the cylindrical pin 4, thereby closing the flow path. At the same time, the upper surface of the chuck 8 releases the pipes in the two sets of clamping grooves 301 above, thereby opening the flow path. When reversing, the chuck 8 moves upward, and its bottom surface releases the pipes below to open the flow path, while its upper surface presses the pipes above to close the flow path, thereby achieving synchronous reverse control of the four channels in two groups.

[0050] Example 5: As attached Figure 11 - Appendix Figure 12 As shown, there are four sets of clamping grooves 301. The four sets of clamping grooves 301 are arranged in a rectangular array around the valve body 3, forming four channels. Three sets of cylindrical pins 4 are fixed to the inner wall of the clamping grooves 301, respectively fixed to the top, middle and bottom surfaces of the four channels. A connecting rod 701 is fixedly connected to the bottom surface of the piston 7. Two sets of clamps 8 are fixed at the end of the connecting rod 701. Two sets of through grooves 702 are passed through the side wall of the connecting rod 701. The cylindrical pins 4 slide with the through grooves 702. The two sets of clamps 8 are located in the two gaps formed by the separation of the three sets of cylindrical pins 4.

[0051] As can be seen from the above, the clamping slots 301 are arranged as A, B, C, and D. The bottom connecting rod 701 of the piston 7 drives the two sets of clamps 8 to move down. The bottom surfaces of the two clamps 8 press the corresponding clamping slot 301 pipes to the cylindrical pin 4, thereby closing the flow path B / D and releasing the top two sets of pipes to open the flow path A / C. When moving up, the flow path A / C is closed and the flow path B / D is opened, realizing the four-channel grouping timing interleaved control.

[0052] Example 6: As attached Figure 13 - Appendix Figure 14 As shown, there are eight sets of clamping grooves 301, which form eight channels. Three sets of cylindrical pins 4 are fixed to the inner wall of the clamping grooves 301, respectively fixed to the top, middle and bottom surfaces of the eight channels. A connecting rod 701 is fixedly connected to the center of the bottom surface of the piston 7. Two sets of clamps 8 are fixed to both walls of the connecting rod 701. Two sets of through grooves 702 pass through the side wall of the connecting rod 701. The cylindrical pins 4 slide with the through grooves 702. The four sets of clamps 8 are located in the two gaps formed by the separation of the three sets of cylindrical pins 4.

[0053] As can be seen from the above, the clamping grooves 301 are arranged in pairs as A, B, C, and D, with each group containing two clamping grooves 301, forming a total of four groups to form eight channels. When the control piston 7 moves down, the bottom surfaces of the four groups of clamps 8 press the corresponding clamping groove 301 fittings against the cylindrical pin 4, thereby closing the flow path B / D and simultaneously releasing the top two groups of fittings to open the flow path A / C. When moving up, the flow path A / C is closed and the flow path B / D is opened, realizing the eight-channel grouping timing interleaved control.

[0054] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0055] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-channel position feedback brushless motor screw-driven clamp valve, characterized in that: include: The drive unit includes a brushless motor (2) and a reducer, and the output end of the drive unit is equipped with a lead screw (9); The valve body (3) is provided with a flange (1) installed between the drive unit and the valve body (3). A clamping groove (301) is provided on the periphery of the valve body (3), and a cylindrical pin (4) is fixed on the inner wall of the clamping groove (301). The clamping unit includes a piston (7) threadedly engaged with the lead screw (9) and a chuck (8) fixed to the bottom end of the piston (7), the position of which corresponds to the cylindrical pin (4); The position feedback circuit includes an electronic limit switch installed in the inner cavity of the valve body (3) and a PCBA board (12) electrically connected to the brushless motor (2). The position feedback circuit outputs an NPN polarity signal and supports power-off position holding.

2. The multi-channel position feedback brushless motor screw-driven clamp valve as described in claim 1, characterized in that: The valve body (3) has a limiting groove (302) in its inner cavity, and the piston (7) is fixedly connected to a limiting block (703) on its periphery. The limiting block (703) slides with the limiting groove (302), and a wear-resistant ring (10) is installed on the periphery of the valve body (3).

3. The multi-channel position feedback brushless motor screw-driven clamp valve as described in claim 2, characterized in that: The clamping groove (301) consists of two sets, which are symmetrically arranged on the periphery of the valve body (3). The two sets of clamping grooves (301) form a double channel, and the cylindrical pin (4) is perpendicular to the two sets of clamping grooves (301).

4. The multi-channel position feedback brushless motor screw-driven clamp valve as described in claim 2, characterized in that: The clamping groove (301) consists of two sets. The two sets of clamping grooves (301) are arranged in a rectangular array around the valve body (3). The two sets of clamping grooves (301) form a double channel. Two sets of cylindrical pins (4) are fixed to the inner wall of the clamping groove (301). The two sets of cylindrical pins (4) are respectively fixed to the top and bottom surfaces of the double channel. A connecting rod (701) is fixedly connected to the bottom surface of the piston (7). A chuck (8) is installed at the end of the connecting rod (701). A through groove (702) is passed through the side wall of the connecting rod (701). The chuck (8) is located in the gap formed by the two sets of cylindrical pins (4).

5. The multi-channel position feedback brushless motor screw-driven clamp valve as described in claim 2, characterized in that: The clamping grooves (301) are in four sets, and the four sets of clamping grooves (301) are symmetrically opened on the periphery of the valve body (3). The four sets of clamping grooves (301) form four channels. Two sets of cylindrical pins (4) are fixed on the inner wall of the clamping grooves (301). The two sets of cylindrical pins (4) are respectively fixed on the top and bottom surfaces of the four channels. A connecting rod (701) is fixedly connected to the bottom surface of the piston (7). A clamp (8) is fixed at the end of the connecting rod (701). A through groove (702) is passed through the side wall of the connecting rod (701). The clamp (8) is located in the gap formed by the two sets of cylindrical pins (4).

6. The multi-channel position feedback brushless motor screw-driven clamp valve as described in claim 2, characterized in that: The clamping groove (301) consists of four sets, which are arranged in a rectangular array around the valve body (3) to form four channels. The inner wall of the clamping groove (301) is fixed with three sets of cylindrical pins (4), which are respectively fixed to the top, middle and bottom surfaces of the four channels. The bottom surface of the piston (7) is fixedly connected with a connecting rod (701). Two sets of clamps (8) are fixed at the end of the connecting rod (701). Two sets of through grooves (702) are passed through the side wall of the connecting rod (701). The two sets of clamps (8) are respectively located in the two gaps formed by the separation of the three sets of cylindrical pins (4).

7. The multi-channel position feedback brushless motor screw-driven clamp valve as described in claim 2, characterized in that: The clamping groove (301) consists of eight sets, forming eight channels. Three sets of cylindrical pins (4) are fixed to the inner wall of the clamping groove (301), respectively fixed to the top, middle and bottom surfaces of the eight channels. A connecting rod (701) is fixedly connected to the center of the bottom surface of the piston (7). Two sets of clamps (8) are fixed to both walls of the connecting rod (701). Two sets of through grooves (702) penetrate the side wall of the connecting rod (701). The four sets of clamps (8) are located in the two gaps formed by the separation of the three sets of cylindrical pins (4).

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