Diaphragm pump with cut-off function

Abstract

The diaphragm pump with the cut-off function comprises a valve rod and a driving piece, the valve rod is arranged in a valve hole of a pump head body in a penetrating mode, a water inlet and a water outlet of the pump head body are respectively communicated with the valve hole, a gradual change flow channel is arranged on the periphery of the valve rod and arranged on the water inlet side, the driving piece is connected with the valve rod, and the valve rod is connected with the driving piece. The driving piece drives the valve rod to move so as to adjust the flow between the gradually-changing flow channel and the water inlet and the flow between the gradually-changing flow channel and the water outlet. The valve rod and the driving piece are additionally arranged, the driving piece drives the valve rod to move, the valve rod stops at a certain point to limit the flow of the tail end of the water inlet, the fixed opening degree is kept, flow adjustment and stability are achieved, the flow is effectively controlled, when the water inlet is completely closed by the valve rod, the effect of stopping water flow can be achieved, and backflow of the water outlet is prevented; and the flow is automatically controlled through the driving piece.

Description

TECHNICAL FIELD

[0001] The utility model relates to water pump technical field, especially a diaphragm pump with cut -off function. BACKGROUND

[0002] Water pump is a kind of for conveying fluid or making fluid pressurization mechanical, the mechanical energy or other external energy of prime mover is sent to liquid, and liquid energy increases, to realize the delivery and pressurization of liquid.

[0003] The design of part of water pump on the market currently, there is the flow control and regulation function deficiency of fluid at inlet. INVENTION CONTENTS

[0004] In order to overcome the above-mentioned shortcomings of prior art, the utility model aims at providing a diaphragm pump with cut -off function, solve the problem of the flow control absence of the inlet of part of water pump currently.

[0005] The utility model solves technical scheme that it adopts: a diaphragm pump with cut -off function, including valve rod and driving part, the valve rod is arranged in the valve hole of pump head body, the inlet and outlet of pump head body are communicated with valve hole respectively, the outer periphery of valve rod is equipped with gradual change flow channel, gradual change flow channel is located at inlet side, driving part is connected with valve rod, driving part drives valve rod to move to adjust the flow of gradual change flow channel and inlet, gradual change flow channel and outlet.

[0006] As a further improvement of the utility model: the position of valve hole relative to inlet extends radially to form first inlet flow channel, first inlet flow channel is communicated with inlet, driving part drives valve rod to move to adjust the flow of gradual change flow channel and first inlet flow channel.

[0007] As a further improvement of the utility model: the end side of valve hole extends radially to form second inlet flow channel, the inside of pump body is equipped with third inlet flow channel, one end of third inlet flow channel is communicated with second inlet flow channel, the other end of third inlet flow channel is communicated with outlet, driving part drives valve rod to move to adjust the flow of gradual change flow channel and second inlet flow channel.

[0008] As a further improvement of the utility model: first inlet flow channel is equipped with inlet sleeve ring, inlet sleeve ring is equipped with through hole for accommodating valve rod, one side of inlet sleeve ring is equipped with water passing opening, and water passing opening is communicated with inlet.

[0009] As a further improvement of the utility model: driving part is connected with output shaft, first screw thread is arranged on output shaft, second screw thread is arranged on one end of valve rod, and first screw thread is connected with second screw thread.

[0010] The utility model discloses a further improvement: the eccentric wheel is connected to the output shaft of the driving part, one end of the valve rod is equipped with a fixed rod, the fixed rod is connected with the eccentric wheel, and the fixed rod, the eccentric wheel and the central axis of the output shaft are parallel to each other.

[0011] The utility model discloses a further improvement: the outer side of pump head body is equipped with a fixed seat, one end of the valve rod is equipped with a positioning part, the inside of the fixed seat is equipped with the limiting hole that contains the positioning part and penetrates, the threaded hole is equipped on the positioning part, and the output shaft of the driving part penetrates the limiting hole and is connected with the threaded hole.

[0012] The utility model discloses a further improvement: the outer side of pump head body is equipped with a fixed seat, one end of the valve rod is equipped with a positioning part, the inside of the fixed seat is equipped with the limiting hole that contains the positioning part and penetrates, the threaded hole is equipped on the positioning part, and the output shaft of the driving part penetrates the limiting hole and is connected with the threaded hole.

[0013] The utility model discloses a further improvement: the first sealing ring is installed to the one end of water inlet sleeve ring and is close to the third water inlet flow channel, and the third sealing ring is installed to the one end of water inlet sleeve ring and is close to the driving part.

[0014] The utility model discloses a further improvement: the second sealing ring is installed between the one end of the fixed seat and the pump body.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] The utility model discloses installing the driving part and valve rod on the pump head body, so that the valve rod penetrates the valve hole and is located below the water inlet, the valve rod is driven to rotate by the driving part to adjust the caliber of the water inlet end, thereby realizing the flow cut-off, control and adjustment of the water inlet and water outlet fluid. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is the structural schematic diagram of the diaphragm pump with the cut-off function of the utility model.

[0018] Fig. 2 It is the schematic diagram of the diaphragm pump with the cut-off function of the utility model.

[0019] Reference Signs:

[0020] 1. First motor; 2. First output shaft; 3. Eccentric seat; 4. Connecting rod; 5. Push frame; 6. Housing; 7. Pressure boosting diaphragm; 8. One-way water outlet diaphragm; 9. Water outlet; 10. Middle plate; 11. Pressure boosting chamber; 12. Partition plate; 13. Water inlet; 14. One-way water inlet diaphragm; 15. Third water inlet channel; 16. Sealing gasket; 17. Water outlet chamber; 18. Second water inlet channel; 19. First sealing ring; 20. Valve stem; 21. Gradient flow channel; 22. Water inlet collar; 23. First water inlet channel; 24. Water inlet; 25. Second sealing ring; 26. Third sealing ring; 27. Second thread; 28. Second output shaft; 29. ​​Drive component; 30. Fixed seat; 31. Water outlet; 32. Pump head body; 33. Rotating component; 34. Fixed rod. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] In order to solve the technical problems in the prior art, the present invention will be further described in conjunction with the accompanying drawings and embodiments:

[0023] like Figs. 1-2 As shown in the figure, this utility model embodiment discloses a diaphragm pump with a shut-off function, including a valve stem 20 and a drive member 29. The valve stem 20 passes through the valve hole of the pump head body 32. The inlet 24 and outlet 31 of the pump head body 32 are respectively connected to the valve hole. The drive member 29 is fixedly mounted on the outside of the pump head body 32. A gradual flow channel 21 is provided on the outer periphery of the valve stem 20. The gradual flow channel 21 is located on the inlet side. The drive member 29 is fixedly connected to the valve stem 20. The drive member 29 drives the valve stem 20 to rotate so that the flow rate of the gradual flow channel 21 and the inlet and the flow rate of the gradual flow channel 21 and the outlet are adjusted, thereby regulating the outflow rate at the end of the inlet 24.

[0024] A valve hole is provided on one side of the pump head body 32 to accommodate the valve stem 20. This valve hole is connected to the inlet 24 and the outlet 31 respectively. The valve hole is located near the inlet 24. The connection between the inlet 24 and the outlet 31 of the pump head body 32 is existing technology and will not be described in detail here. When the electric flow control valve is used to control the liquid flow rate, the liquid enters the pump head body 32 from the inlet 24 and the gradient flow channel 21. The valve stem 20 is rotated by the drive component 29 to adjust the outflow rate at the end of the inlet 24, that is, to adjust the flow rate of the fluid from the inlet 24 into the gradient flow channel 21 and from the gradient flow channel 21 into the pump head body, thereby adjusting the flow rate from the inside of the pump head body to the outlet.

[0025] Specifically, when the drive component 29 stops working, the valve stem 20 is at a certain point to limit the flow and achieve flow stability. When the valve stem 20 completely blocks or closes the end of the inlet 24, the liquid cannot enter the pump head body from the inlet and the gradient flow channel 21, thus achieving the function of cutting off the water flow, which is equivalent to the function of a stop valve to prevent backflow.

[0026] In some embodiments, the valve orifice extends radially relative to the water inlet to form a first water inlet channel 23, which is connected to the water inlet. The driving member drives the valve stem to move to adjust the flow rate of the gradient channel 21 and the first water inlet channel 23.

[0027] Furthermore, an inlet ring is installed in the first inlet channel 23. The inlet ring has a through hole for accommodating the valve stem. A water outlet is provided on one side of the inlet ring, and the water outlet is connected to the inlet.

[0028] A positioning collar 22 is fitted at one end of the valve hole near the inlet 24. The positioning collar 22 has a through hole to accommodate the valve stem 20 passing through the valve hole. A water outlet is opened on one side of the positioning collar 22, which is connected to the inlet 24.

[0029] The positioning collar 22 is embedded in the first water inlet channel 23. The water outlet can also be regarded as the first water inlet channel 23. The water inlet 24 and the water outlet are kept in communication. The water flow enters from the water inlet 24 and reaches the water outlet. The water outlet is equivalent to the end of the water inlet 24. When the driving member 29 drives the valve stem 20 to rotate and block the water outlet, the water flow does not enter the water outlet 31. When the valve stem 20 does not block the water outlet, the water inlet 24, the valve hole and the water outlet 31 are connected.

[0030] In some embodiments, a second inlet channel 18 is formed by radially extending one end of the valve orifice, and a third inlet channel 15 is provided inside the pump body. One end of the third inlet channel 15 is connected to the second inlet channel 18, and the other end of the third inlet channel 15 is connected to the outlet. The drive unit drives the valve stem to move to adjust the flow rate of the gradient channel 21 and the second inlet channel 18.

[0031] The driving component moves the valve stem to a certain position, and the water flows from the inlet into the first inlet channel 23, then from the gradient channel 21 into the second inlet channel 18 and the third inlet channel 15 in sequence, and then from the third inlet channel 15 to the outlet of the pump head body, and the liquid flows out.

[0032] In some implementations, such as Fig. 1 As shown, the output shaft of the drive member 29 is provided with a first thread, and one end of the valve stem 20 is provided with a second thread 27 adapted to the first thread. Preferably, the first thread is an external thread, and the second thread 27 is an internal thread. The output shaft of the drive member 29 is a second output shaft 28.

[0033] The output shaft of the drive unit 29 rotates, causing the valve stem 20 to rotate, which in turn moves the valve stem 20 back and forth in the valve hole, changing the opening of the water inlet / first inlet channel 23, effectively achieving end flow control and regulation at the water inlet 24. When the drive unit 29 stops working, the valve stem 20 is at a certain point, and the opening of the water inlet is fixed, ensuring flow stability. When the drive unit 29 drives the valve stem 20 to block / close the water inlet, it functions as a shut-off valve, completely cutting off the fluid passage.

[0034] In specific examples, such as Fig. 1 As shown, the gradient flow channel 21 on the valve stem 20 moves back and forth at the water inlet in the valve hole. The fixed end of the valve stem 20 is connected to the drive member 29. The drive member 29 drives the gradient flow channel 21 of the valve stem 20 to move forward. The gradient flow channel 21 is completely aligned with or completely offset from the first inlet flow channel 23, blocking the water inlet. At this time, the water inlet is closed and acts as a stop valve. The drive member 29 drives the movable end of the valve stem 20 to move backward. When the gradient flow channel 21 and the first inlet flow channel 23 are intersected, the water inlet 24, the first inlet flow channel 23, the gradient flow channel 21, the second inlet flow channel 18, the third inlet flow channel 15, and the outlet 31 are connected in sequence. The drive member 29 drives the valve stem 20 to move back and forth at the first inlet flow channel 23, effectively adjusting the flow rate of the water inlet 24.

[0035] Furthermore, a fixed seat 30 is provided on the outer side of the pump head body 32, and a positioning part is provided at one end of the valve stem 20. A limiting hole for accommodating the positioning part is opened inside the fixed seat 30, and a threaded hole is opened on the positioning part. The output shaft of the drive member 29 passes through the limiting hole and is connected to the threaded hole.

[0036] The positioning part is located on the outside of the valve hole. A threaded hole is formed in the positioning part, and the driving component 29 is fixedly connected to the fixed seat 30. The output shaft of the driving component 29 is coaxially arranged with the valve stem 20. An external thread is designed on the output shaft of the driving component 29 to engage with the threaded hole in the positioning part, enabling the driving component 29 and the valve stem 20 to rotate. Furthermore, during the back-and-forth movement of the valve stem 20 driven by the driving component 29, the positioning part moves back and forth within the limiting hole. Preferably, the outer peripheral wall of the positioning part fits against the limiting hole, and the limiting hole provides a certain guiding function for the positioning part.

[0037] A gradual flow channel 21 is formed by a recess on the outer periphery of the valve stem 20. The driving member 29 drives the valve stem 20 to rotate so that the first water inlet channel 23, the gradual flow channel 21 and the second water inlet channel 18 are connected or closed, thereby regulating the flow rate of water that finally enters the third water inlet channel 15.

[0038] In the implementation where the driving component 29 moves the valve stem 20 back and forth, a gradual flow channel 21 is formed in the outer periphery of the valve stem 20. The driving component 29 moves the valve stem 20 back and forth, causing the gradual flow channel 21 to communicate with the water outlet, while maintaining communication between the water inlet 24, the first water inlet channel 23, the second water inlet channel 18, the third water inlet channel 15, and the water outlet 31. When the driving component 29 stops working and the valve stem 20 is in a certain position, the flow rate of water is restricted. At the same time, the liquid passes through the gradual flow channel 21 of the valve stem 20 (the flow channel changes gradually), achieving flow stability. In this case, a part of the gradual flow channel 21 is connected to the water outlet, and the other part of the gradual flow channel 21 is connected to the second water inlet channel 18.

[0039] When the driving component 29 drives the valve stem 20 to move back and forth, the water outlet is connected to the gradual flow channel 21, the gradual flow channel 21 is fully connected to the water outlet, and the gradual flow channel 21 is not connected to the second inlet flow channel 18, which is equivalent to the water inlet 24 being completely closed, thus stopping the water flow; or the water outlet is not connected to the gradual flow channel 21, and the gradual flow channel 21 is fully connected to or offset from the second inlet flow channel 18, which is equivalent to the water inlet 24 being completely closed, thus also stopping the water flow.

[0040] The length of the valve stem 20 is designed according to specific examples and different adjustment methods. The valve stem 20 moves back and forth, and the valve hole is usually designed as a round hole. The shape of the valve hole can be adjusted according to actual needs, but there are no further restrictions here.

[0041] The pump head body is equipped with a first motor 1, a first output shaft 2, an eccentric seat 3, a connecting rod 4, a pusher 5, and a housing 6. The first output shaft 2 of the first motor 1 is connected to the eccentric seat 3. The eccentric seat 3 is connected to the pusher 5 through the connecting rod 4. The pusher 5 is connected to a pressure boosting diaphragm 7. The pump body is equipped with a one-way diaphragm 8, an outlet hole 9, a middle plate 10, a pressure boosting chamber 11, a partition plate 12, a sealing gasket 16, an outlet chamber 17, an inlet hole 13, and an inlet one-way diaphragm 14. The inlet hole 13 is connected to the third inlet channel 15. The inlet hole 13, the pressure boosting chamber 11, the outlet hole 9, the outlet chamber 17, and the outlet are connected in sequence.

[0042] In some implementations, such as Fig. 2 As shown, the output shaft of the drive component 29 is connected to a rotating component 33, which is connected to the valve stem 20. The rotation axis of the valve stem 20, the rotation axis of the rotating component 33, and the rotation axis of the output shaft are parallel to each other.

[0043] Similarly, the driving component 29 drives the rotating component 33 to rotate, thereby causing the valve stem 20 to rotate. The valve stem 20 rotates at the water inlet / first inlet channel 23, realizing the opening and closing of the water inlet, which is equivalent to adjusting the flow rate of the water inlet 24. When the driving component 29 stops working, it controls the valve stem 20 to stay in a certain position, fixing the opening of the water inlet and limiting the outflow of water through the water inlet to achieve flow stability. For ease of understanding, this valve orifice is a flat orifice, roughly rectangular in shape.

[0044] In a specific example, the movable end of the valve stem 20 swings left and right at the water inlet in the valve hole. A portion of the outer circumference of the valve stem 20 forms a gradient flow channel 21, while another portion of the outer circumference of the valve stem 20 remains unchanged, i.e., no gradient flow channel 21 is formed. During the rotation of the valve stem 20, the water inlet may or may not be connected to the gradient flow channel 21, which is connected to the second water inlet channel 18.

[0045] When the drive unit 29 operates, the gradient flow channel 21 on the valve stem 20 is connected to the water outlet / first inlet flow channel 23, and simultaneously the gradient flow channel 21 is connected to the second inlet flow channel 18. The second inlet flow channel 18 is connected to the outlet 31 through the third inlet flow channel 15. When the drive unit 29 positions the valve stem 20 at a certain position, it changes the diameter of the connection between the gradient flow channel 21 and the water outlet, which can limit the flow rate at the water outlet. Furthermore, the gradient flow channel 21 (with its gradual flow path) also helps to stabilize the flow rate. When the drive unit 29 disconnects the gradient flow channel 21 on the valve stem 20 from the first inlet flow channel 23, the fluid at the inlet 24 and the water outlet cannot enter the second inlet flow channel 18, effectively closing the inlet 24.

[0046] Furthermore, such as Fig. 2As shown, the rotating component 33 is an eccentric wheel, and a fixed rod 34 is provided on the eccentric wheel. The fixed rod 34 is fixedly connected to one end of the valve stem 20. When the output shaft of the driving component 29 rotates, the eccentric wheel rotates accordingly, thereby driving the valve stem 20 to rotate, causing the valve stem 20 to swing left and right in the valve hole, changing the opening of the water inlet, and effectively realizing flow control and regulation at the water inlet 24.

[0047] Furthermore, the outer side of the positioning collar 22 is connected to the fixing seat 30, and the driving component 29 is mounted on the fixing seat 30.

[0048] The driving component 29 of this utility model is an electric motor.

[0049] Furthermore, the fixed seat 30 and the positioning collar 22 can be set as a single unit. The specific shape of the fixed seat 30 can be adjusted according to the movement of the valve stem 20 back and forth and its rotation and swing left and right.

[0050] A mounting base is installed on the outside of the pump head body. One end of the mounting base is arranged around the outer periphery of the valve hole. One end of the mounting base has an opening to accommodate the valve stem passing through the valve hole. The drive component is mounted on the mounting base.

[0051] Furthermore, the front end of the positioning collar 22 is provided with a first sealing ring 19, and the rear end of the positioning collar 22 is provided with a third sealing ring 26. The valve stem 20 passes through the first sealing ring 19 and the third sealing ring 26 in sequence. One end of the fixed seat is not integrally formed with the positioning collar 22, and one end of the positioning collar 22 is embedded in the other end of the fixed seat. A third sealing ring is provided between the positioning collar 22 and the fixed seat.

[0052] Specifically, the first sealing ring 19 is positioned away from the drive member 29, and the third sealing ring 26 is positioned closer to the drive member 29. The first sealing ring 19 is located between the positioning collar 22 and the pump head body 32 structure surrounding the valve hole, and the movable end of the valve stem 20 passes through the first sealing ring 19.

[0053] Furthermore, a second sealing ring 25 is provided between the positioning collar 22 and the inner wall of the pump head body 32.

[0054] The main functions of this utility model are:

[0055] 1. This utility model installs a drive component and a valve stem on the pump head body of a water pump. The valve stem passes through the valve hole of the pump head body and is located below the end of the inlet. The drive component drives the valve stem to rotate to change the outlet diameter at the end of the inlet and adjust the flow rate of the fluid at the outlet.

[0056] 2. A gradually changing flow channel is formed by a recess on the outer periphery of the valve stem. When the driving component stops moving, the valve stem is positioned at a certain point. The fluid from the inlet and the first inlet flow channel flows into the second inlet flow channel and the third inlet flow channel through the gradually changing flow channel and then flows out from the outlet. The flow rate stability is achieved by using a gradually changing flow channel. The driving component drives the valve stem to close the flow between the first inlet flow channel and the second inlet flow channel, thus stopping the water flow at the inlet.

[0057] In summary, any other corresponding modifications made by those skilled in the art after reading this utility model document, based on the technical solution and concept of this utility model without creative mental effort, shall all fall within the scope of protection of this utility model.

Claims

1. A diaphragm pump with a shut-off function, characterized in that, The device includes a valve stem and a drive component. The valve stem passes through a valve hole in the pump head body. The inlet and outlet of the pump head body are respectively connected to the valve hole. A gradient flow channel is provided on the outer periphery of the valve stem. The gradient flow channel is located on the inlet side. The drive component is connected to the valve stem. The drive component drives the valve stem to move to adjust the flow rate between the gradient flow channel and the inlet, and between the gradient flow channel and the outlet.

2. A diaphragm pump with a shut-off function according to claim 1, characterized in that, The valve hole extends radially relative to the water inlet to form a first water inlet channel. The first water inlet channel is connected to the water inlet. The driving component drives the valve stem to move to adjust the flow rate of the gradient channel and the first water inlet channel.

3. A diaphragm pump with a shut-off function according to claim 2, characterized in that, The valve hole extends radially to one end to form a second water inlet channel. The pump body has a third water inlet channel inside. One end of the third water inlet channel is connected to the second water inlet channel, and the other end of the third water inlet channel is connected to the outlet. The driving component drives the valve stem to move to adjust the flow rate of the gradient channel and the second water inlet channel.

4. A diaphragm pump with a shut-off function according to claim 2, characterized in that, An inlet ring is installed in the first inlet channel. The inlet ring has a through hole to accommodate the valve stem. A water outlet is provided on one side of the inlet ring, and the water outlet is connected to the inlet.

5. A diaphragm pump with a shut-off function according to any one of claims 1 to 4, characterized in that, The drive component is connected to an output shaft, the output shaft is provided with a first thread, and one end of the valve stem is provided with a second thread, the first thread and the second thread are connected in a mating manner.

6. A diaphragm pump with a shut-off function according to any one of claims 1 to 4, characterized in that, The output shaft of the drive component is connected to an eccentric wheel, and a fixed rod is installed at one end of the valve stem. The fixed rod is connected to the eccentric wheel, and the fixed rod, the eccentric wheel, and the central axis of the output shaft are parallel to each other.

7. A diaphragm pump with a shut-off function according to claim 5, characterized in that, A fixed seat is provided on the outside of the pump head body, and a positioning part is provided at one end of the valve stem. A limiting hole is opened inside the fixed seat to accommodate the positioning part. A threaded hole is opened on the positioning part, and the output shaft of the drive unit passes through the limiting hole and is connected to the threaded hole.

8. A diaphragm pump with a shut-off function according to claim 6, characterized in that, A fixed seat is installed on the outside of the pump head body. One end of the fixed seat is arranged around the outer periphery of the valve hole. One end of the fixed seat is provided with an opening to accommodate the valve stem passing through the valve hole. The drive component is installed on the fixed seat.

9. A diaphragm pump with a shut-off function according to claim 4, characterized in that, The water inlet sleeve is equipped with a first sealing ring at one end near the third water inlet channel, and a third sealing ring is equipped at the other end near the drive component.

10. A diaphragm pump with a shut-off function according to claim 7 or 8, characterized in that, A second sealing ring is installed between one end of the fixed base and the pump body.

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