Micro-fluidic electromagnetic valve capable of accurately regulating and controlling flow of vacuum pump

Abstract

The utility model provides a micro-fluidic electromagnetic valve capable of accurately regulating and controlling the flow of a vacuum pump, which relates to the technical field of electromagnetic valves and comprises a valve body, a protective shell fixedly mounted at the top of the valve body, a coil arranged on the inner wall of the protective shell, an iron plate fixedly mounted on the top surface in the protective shell, and a first spring fixedly mounted at the bottom of the iron plate. A valve element is fixedly installed at the bottom of the first spring. During use, a worker rotates a grip, the grip drives a threaded rod to rotate, the threaded rod moves along a threaded hole, a limiting rod enters a protective shell, then the worker electrifies a coil, when current passes through the coil, a magnetic field is generated, the acting force of the magnetic field drives an iron valve element to move, the valve element ascends, a first spring is compressed, and the valve element is driven to move. When the top of the valve element makes contact with the limiting rod, the valve element stops moving, and therefore a worker can control the position of the limiting rod in the protective shell, the moving distance of the valve element is controlled, and flow adjustment can be completed.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic valve technology, and in particular to a microfluidic electromagnetic valve for precise flow control of a vacuum pump. Background Technology

[0002] A solenoid valve is a valve body that controls the opening and closing of a gas or liquid flow pipeline using electromagnetic force. It typically consists of two parts: an electromagnetic component and a valve body. When the solenoid coil is energized, the generated magnetic force attracts the valve core, thus changing the valve's opening and closing state and controlling the fluid. When the solenoid coil is de-energized, the valve core returns to its initial position under the action of a spring force or other reset mechanism, closing the fluid passage. Solenoid valves are mainly used in industrial manufacturing, the automotive industry, medical equipment, building automation, and agriculture.

[0003] In the prior art, a vacuum pump solenoid valve is a miniaturized electrically controlled valve used to control the gas flow of a vacuum pump. When some solenoid valves are used, they can usually only control the opening and closing state of the valve, but it may be difficult to control the flow rate. Therefore, when the vacuum pump is used, it may cause the vacuum pump to overload, which may lead to damage to the vacuum pump. Utility Model Content

[0004] The purpose of this invention is to solve the problem that some solenoid valves in the prior art can only control the opening and closing state of the valve and it is difficult to control the flow rate. Therefore, this invention proposes a microfluidic solenoid valve for precise flow control of vacuum pumps.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a microfluidic solenoid valve for precise flow control of a vacuum pump, comprising a valve body, a protective shell fixedly installed on the top of the valve body, a coil disposed on the inner wall of the protective shell, an iron plate fixedly installed on the top surface inside the protective shell, a first spring fixedly installed on the bottom of the iron plate, a valve core fixedly installed on the bottom of the first spring, the bottom of the valve core entering the valve body, a fixed seat disposed on the top of the protective shell, a threaded hole penetrating through the top surface inside the fixed seat, a threaded rod threadedly connected inside the threaded hole, a handle fixedly installed on the top of the threaded rod, a limit rod movably connected to the bottom of the threaded rod, the bottom of the limit rod penetrating through the protective shell and the iron plate.

[0006] Preferably, a plug plate is fixedly installed on the outer wall of the fixing base, and slots are provided on both outer sides of the plug plate.

[0007] Preferably, a placement seat is fixedly installed on the top of the protective shell, and a slot is opened through the top of the placement seat. Two limiting grooves are opened inside the placement seat. A second spring is fixedly installed on the inner wall of the limiting groove. A limiting plate is fixedly installed on one end of the second spring. A locking block and a moving plate are fixedly installed on the outer wall of the limiting plate. One end of the locking block enters into the slot. A storage groove is opened through the two limiting grooves. The moving plate is slidably connected to the storage groove.

[0008] Preferably, the inner wall of the storage slot is provided with a fixing slot, and two third springs are fixedly installed on the inner wall of the fixing slot. A push plate is fixedly installed on one end of each of the two third springs, and a pressure plate is fixedly installed on the top of the push plate. The top of the pressure plate passes through the placement seat.

[0009] Preferably, the outer wall of the limiting rod is in contact with the inner wall of the fixing seat.

[0010] Preferably, the inner wall of the slot is in contact with the outer wall of the insert plate, and the outer wall of the card block is in contact with the inner wall of the card slot.

[0011] Preferably, the outer wall of the limiting plate is in contact with the inner wall of the limiting groove.

[0012] Preferably, the inner sidewall of the fixed base has an opening, a connecting plate is fixedly installed at one end of the limiting rod near the opening, and a pointer is fixedly installed at one end of the connecting plate.

[0013] Preferably, a graduated groove is provided at one end of the fixed base near the opening.

[0014] Preferably, connecting pipes are fixedly installed at both ends of the valve body.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0016] 1. In this utility model, during use, the operator rotates the handle, which drives the threaded rod to rotate. The threaded rod moves along the threaded hole, causing the limiting rod to enter the protective shell. Then, the operator energizes the coil. When the current passes through the coil, a magnetic field is generated. The magnetic field force drives the iron valve core to move. The valve core rises, and the first spring is compressed. When the top of the valve core contacts the limiting rod, the valve core stops moving. In this way, the operator can control the position of the limiting rod inside the protective shell, thereby controlling the movement distance of the valve core, thus completing the flow rate adjustment.

[0017] 2. In this utility model, when the limiting rod is damaged or the threaded rod is worn, the worker presses down the pressure plate, the third spring stretches, the pressure plate drives the push plate to descend, the push plate contacts the inclined surfaces of the two moving plates respectively, so that the two moving plates move away from each other, the second spring compresses, the moving plates drive the locking block to move through the limiting plate, the locking block leaves the slot, at this time the worker can pull out the insert plate from the slot, replace the new fixing seat, insert the insert plate into the slot, release the pressure plate, the elastic force of the third spring drives the push plate to reset, at this time the elastic force of the second spring drives the locking block into the slot, thus completing the fixing, improving the installation and disassembly efficiency. Attached Figure Description

[0018] Figure 1 An overall three-dimensional view of a microfluidic solenoid valve for precise flow control of a vacuum pump is presented for this utility model;

[0019] Figure 2 A cross-sectional view of the valve body of a microfluidic solenoid valve for precise flow control of a vacuum pump is provided for this utility model.

[0020] Figure 3 A cross-sectional view of the mounting base of a microfluidic solenoid valve for precise flow control of a vacuum pump is provided for this utility model.

[0021] Figure 4 A cross-sectional view of the placement seat of a microfluidic solenoid valve for precise flow control of a vacuum pump is provided for this utility model.

[0022] Figure 5 This utility model presents a cross-sectional view of the mounting base of a microfluidic solenoid valve for precise flow control of a vacuum pump from another direction.

[0023] Legend: 1. Valve body; 2. Connecting pipe; 3. Protective shell; 4. Fixing seat; 5. Placement seat; 6. Coil; 7. Iron plate; 8. First spring; 9. Valve core; 10. Limiting rod; 11. Threaded hole; 12. Threaded rod; 13. Handle; 14. Opening; 15. Connecting plate; 16. Pointer; 17. Scale groove; 18. Slot; 19. Insert plate; 20. Slot; 21. Limiting groove; 22. Second spring; 23. Limiting plate; 24. Locking block; 25. Storage slot; 26. Moving plate; 27. Fixing groove; 28. Third spring; 29. ​​Push plate; 30. Pressure plate. Detailed Implementation

[0024] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0026] Example 1, such as Figures 1-5 As shown, this utility model provides a microfluidic solenoid valve for precise flow control of a vacuum pump, including a valve body 1, a protective shell 3 fixedly installed on the top of the valve body 1, a coil 6 provided on the inner wall of the protective shell 3, an iron plate 7 fixedly installed on the top surface inside the protective shell 3, a first spring 8 fixedly installed on the bottom of the iron plate 7, a valve core 9 fixedly installed on the bottom of the first spring 8, the bottom of the valve core 9 entering the valve body 1, a fixing seat 4 provided on the top of the protective shell 3, a threaded hole 11 penetrating through the top surface inside the fixing seat 4, a threaded rod 12 threadedly connected inside the threaded hole 11, a handle 13 fixedly installed on the top of the threaded rod 12, a limit rod 10 movably connected to the bottom of the threaded rod 12, the bottom of the limit rod 10 penetrating through the protective shell 3 and the iron plate 7.

[0027] The effect achieved by the entire embodiment 1 is as follows: When in use, the operator rotates the handle 13, which drives the threaded rod 12 to rotate. The threaded rod 12 moves along the threaded hole 11, causing the limiting rod 10 to enter the protective shell 3. Then, the operator energizes the coil 6. When the current passes through the coil 6, a magnetic field is generated. The magnetic field force drives the iron valve core 9 to move. The valve core 9 rises, and the first spring 8 is compressed. When the top of the valve core 9 contacts the limiting rod 10, the valve core 9 stops moving. In this way, the operator can control the position of the limiting rod 10 in the protective shell 3, and thus control the moving distance of the valve core 9, thereby completing the flow rate adjustment.

[0028] Example 2, as Figures 1-5 As shown, a plate 19 is further fixedly installed on the outer wall of the fixing base 4. The plate 19 has slots 20 on both sides. When the locking block 24 leaves the slot 20, the operator can pull out the plate 19 from the slot 18.

[0029] Furthermore, a placement seat 5 is fixedly installed on the top of the protective shell 3. A slot 18 is opened through the top of the placement seat 5. Two limiting grooves 21 are opened inside the placement seat 5. A second spring 22 is fixedly installed on the inner wall of the limiting groove 21. A limiting plate 23 is fixedly installed on one end of the second spring 22. A locking block 24 and a moving plate 26 are fixedly installed on the outer wall of the limiting plate 23. One end of the locking block 24 enters the slot 18. A storage groove 25 is opened through the two limiting grooves 21. The moving plate 26 is slidably connected to the storage groove 25. When the push plate 29 contacts the inclined surfaces of the two moving plates 26 respectively, the two moving plates 26 move away from each other, the second spring 22 is compressed, and the moving plate 26 drives the locking block 24 to move through the limiting plate 23.

[0030] Furthermore, a fixing groove 27 is provided on the inner wall of the storage groove 25. Two third springs 28 are fixedly installed on the inner wall of the fixing groove 27. A push plate 29 is fixedly installed on one end of the two third springs 28. A pressure plate 30 is fixedly installed on the top of the push plate 29. The top of the pressure plate 30 passes through the placement seat 5. When the operator presses down the pressure plate 30, the third springs 28 are stretched, and the pressure plate 30 drives the push plate 29 to descend.

[0031] Furthermore, the outer wall of the limiting rod 10 is in contact with the inner wall of the fixed seat 4 to prevent the limiting rod 10 from rotating when the threaded rod 12 rotates.

[0032] Furthermore, the inner wall of the slot 18 fits against the outer wall of the insert plate 19, and the outer wall of the locking block 24 fits against the inner wall of the slot 20. When the insert plate 19 enters the slot 18 and the locking block 24 enters the slot 20, the insert plate 19 can be fixed in place and will not shake.

[0033] Furthermore, the outer wall of the limiting plate 23 fits against the inner wall of the limiting groove 21 to prevent the limiting plate 23 from tilting.

[0034] Furthermore, an opening 14 is provided through the inner side wall of the fixed base 4, and a connecting plate 15 is fixedly installed at one end of the limiting rod 10 near the opening 14, and a pointer 16 is fixedly installed at one end of the connecting plate 15.

[0035] Furthermore, a scale groove 17 is provided on the outer end of the fixed base 4 near the opening 14. When the limiting rod 10 moves, the limiting rod 10 drives the pointer 16 to move through the connecting plate 15, so that the operator can control the flow rate according to the scale on the scale groove 17, which is convenient for adjustment.

[0036] Furthermore, connecting pipes 2 are fixedly installed at both ends of the valve body 1 for easy connection to the vacuum pump.

[0037] The effect achieved by the entire embodiment 2 is as follows: when the limiting rod 10 is damaged or the threaded rod 12 is worn, the operator presses down the pressure plate 30, the third spring 28 is stretched, the pressure plate 30 drives the push plate 29 to descend, the push plate 29 contacts the inclined surfaces of the two moving plates 26 respectively, so that the two moving plates 26 move away from each other, the second spring 22 is compressed, the moving plate 26 drives the locking block 24 to move through the limiting plate 23, the locking block 24 leaves the slot 20, at this time the operator can pull out the insert plate 19 from the slot 18, replace the new fixing seat 4, insert the insert plate 19 into the slot 18, release the pressure plate 30, the elastic force of the third spring 28 drives the push plate 29 to reset, at this time the elastic force of the second spring 22 drives the locking block 24 into the slot 20, thus completing the fixing, improving the installation and disassembly efficiency.

[0038] Working principle: In use, the operator rotates the handle 13, which drives the threaded rod 12 to rotate. The threaded rod 12 moves along the threaded hole 11, causing the limiting rod 10 to enter the protective shell 3. Then, the operator energizes the coil 6. When current passes through the coil 6, a magnetic field is generated. The magnetic field force drives the iron valve core 9 to move. The valve core 9 rises, and the first spring 8 is compressed. When the top of the valve core 9 contacts the limiting rod 10, the valve core 9 stops moving. In this way, the operator can control the position of the limiting rod 10 within the protective shell 3, thereby controlling the movement distance of the valve core 9, thus completing the flow rate adjustment. When the limiting rod 10 moves, it drives the pointer 16 to move through the connecting plate 15. The operator can then control the flow rate according to the scale on the scale groove 17 of the pointer 16, making adjustment convenient. When the limit rod 10 is damaged or the threaded rod 12 is worn, the operator presses down the pressure plate 30, the third spring 28 stretches, the pressure plate 30 drives the push plate 29 to descend, the push plate 29 contacts the inclined surfaces of the two moving plates 26 respectively, so that the two moving plates 26 move away from each other, the second spring 22 is compressed, the moving plate 26 drives the locking block 24 to move through the limit plate 23, the locking block 24 leaves the slot 20, at this time the operator can pull out the insert plate 19 from the slot 18, replace the new fixing seat 4, insert the insert plate 19 into the slot 18, release the pressure plate 30, the elastic force of the third spring 28 drives the push plate 29 to return to its original position, at this time the elastic force of the second spring 22 drives the locking block 24 into the slot 20, thus completing the fixing, improving the installation and disassembly efficiency.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A microfluidic solenoid valve for precise flow control of a vacuum pump, comprising a valve body (1), characterized in that: A protective shell (3) is fixedly installed on the top of the valve body (1). A coil (6) is provided on the inner wall of the protective shell (3). An iron plate (7) is fixedly installed on the top surface inside the protective shell (3). A first spring (8) is fixedly installed on the bottom of the iron plate (7). A valve core (9) is fixedly installed on the bottom of the first spring (8). The bottom of the valve core (9) enters the valve body (1). A fixed seat (4) is provided on the top of the protective shell (3). A threaded hole (11) is opened through the top surface inside the fixed seat (4). A threaded rod (12) is threadedly connected inside the threaded hole (11). A handle (13) is fixedly installed on the top of the threaded rod (12). A limit rod (10) is movably connected to the bottom of the threaded rod (12). The bottom of the limit rod (10) passes through the protective shell (3) and the iron plate (7).

2. The microfluidic solenoid valve for precise flow control of a vacuum pump according to claim 1, characterized in that: The outer wall of the fixed base (4) is fixedly installed with a plug plate (19), and slots (20) are provided on both sides of the outer side of the plug plate (19).

3. The microfluidic solenoid valve for precise flow control of a vacuum pump according to claim 1, characterized in that: The protective shell (3) is fixedly installed with a placement seat (5) on the top. The placement seat (5) has a slot (18) through it. The placement seat (5) has two limiting grooves (21) inside. The inner wall of the limiting groove (21) is fixedly installed with a second spring (22). One end of the second spring (22) is fixedly installed with a limiting plate (23). The outer wall of the limiting plate (23) is fixedly installed with a locking block (24) and a moving plate (26). One end of the locking block (24) enters the slot (18). A storage slot (25) is through it between the two limiting grooves (21). The moving plate (26) is slidably connected to the storage slot (25).

4. The microfluidic solenoid valve for precise flow control of a vacuum pump according to claim 3, characterized in that: The inner wall of the storage slot (25) is provided with a fixing slot (27). Two third springs (28) are fixedly installed on the inner wall of the fixing slot (27). A push plate (29) is fixedly installed at one end of the two third springs (28). A pressure plate (30) is fixedly installed on the top of the push plate (29). The top of the pressure plate (30) passes through the placement seat (5).

5. A microfluidic solenoid valve for precise flow control of a vacuum pump according to claim 1, characterized in that: The outer wall of the limiting rod (10) is in contact with the inner wall of the fixing seat (4).

6. The microfluidic solenoid valve for precise flow control of a vacuum pump according to claim 3, characterized in that: The inner wall of the slot (18) is in contact with the outer wall of the insert plate (19), and the outer wall of the card block (24) is in contact with the inner wall of the card slot (20).

7. A microfluidic solenoid valve for precise flow control of a vacuum pump according to claim 3, characterized in that: The outer wall of the limiting plate (23) is in contact with the inner wall of the limiting groove (21).

8. The microfluidic solenoid valve for precise flow control of a vacuum pump according to claim 1, characterized in that: The inner side wall of the fixed seat (4) has an opening (14) through it. A connecting plate (15) is fixedly installed on one end of the limiting rod (10) near the opening (14). A pointer (16) is fixedly installed on one end of the connecting plate (15).

9. A microfluidic solenoid valve for precise flow control of a vacuum pump according to claim 1, characterized in that: The fixed base (4) has a scale groove (17) on one end near the opening (14).

10. A microfluidic solenoid valve for precise flow control of a vacuum pump according to claim 1, characterized in that: Both ends of the valve body (1) are fixedly installed with connecting pipes (2).

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