Pressure regulating electromagnetic valve and control method thereof

Abstract

The invention relates to the technical field of electromagnetic valves, in particular to a pressure regulating electromagnetic valve and a control method thereof.The pressure regulating electromagnetic valve comprises a valve seat, an electromagnetic valve assembly and a pressure regulating assembly, and the pressure regulating assembly comprises a connecting seat, a connector and a flow guide pipe; a first annular flow guide cavity is formed between the inner wall of the connecting base and the flow guide pipe, a plurality of guide sliding blocks distributed corresponding to the guide sliding grooves are arranged on the flow guide pipe in the circumferential direction, and elastic pieces are arranged at the two ends of each guide sliding block; the flow guide pipe is provided with a first channel along the axis, a drainage pipe formed by extending the end, away from the connector, of the flow guide pipe and the inner hole wall of the inlet end form a second annular flow guide cavity, and the first annular flow guide cavity and the second annular flow guide cavity are communicated to form a second channel. When the electromagnetic coil is electrified, the end part of the flow guide pipe is propped against the end surface of the connector to control the closing of the second passage. Through the arrangement of the flow guide pipe, the flow of a medium is controlled, accurate pressure control is achieved, the situation that components in the electromagnetic valve body are damaged by too high pressure is prevented, and the service life of the electromagnetic valve is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of solenoid valves, and in particular to a pressure-regulating solenoid valve and a control method thereof. Background Art

[0002] A solenoid valve is an industrial device controlled by electromagnetics. It is a basic automation component used to control fluids. It is an actuator used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium. The solenoid valve can be used in conjunction with different circuits to achieve the desired control. However, the solenoid valves in the existing technology generally do not have a pressure regulating function. When the air pressure entering the solenoid valve is too high, it will cause damage to the components inside the solenoid valve body. Therefore, it is necessary to design a solenoid valve that can regulate pressure. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a pressure regulating solenoid valve and a control method thereof, which effectively solve the problems in the background technology.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is: a pressure regulating solenoid valve, comprising: The valve seat has an inlet end and an outlet end, and a valve port is arranged in the middle position; a solenoid valve assembly, arranged above the valve port; a pressure regulating assembly connected to the inlet end of the valve seat, comprising a connecting seat connected to the inlet end, a connecting head connected to the connecting seat away from the inlet end, and a flow guide pipe located in the connecting seat; A first annular guide cavity is formed between the inner wall of the connecting seat and the guide pipe, and a plurality of guide grooves are provided on the inner side wall of the connecting seat. The guide pipe is provided with a plurality of guide sliders distributed corresponding to the plurality of guide grooves along the circumferential direction, and elastic members are provided at both ends of the guide sliders. The guide tube is provided with a first passage along the axis, and one end of the guide tube extends away from the connector to form a guide tube, and the guide tube and the inner hole wall of the inlet end form a second annular guide cavity, and the first annular guide cavity and the second annular guide cavity are connected to form a second passage; An electromagnetic coil is provided on the outer side of the connecting seat. When the electromagnetic coil is energized, the end of the flow guide tube abuts against the end surface of the connecting head to control the closing of the second passage.

[0005] Furthermore, the guide tube is provided with an inclined guide surface at a transition surface between the first annular guide cavity and the second annular guide cavity.

[0006] Furthermore, a first step shaft section and a second step shaft are provided on opposite surfaces of the guide pipe and the connector, and both ends of the elastic member are respectively sleeved on the first step shaft and the second step shaft.

[0007] Furthermore, the end surface of the first step shaft section is provided with a conical diverter surface.

[0008] Furthermore, the end of the drainage tube is provided with a plurality of abutment pieces along the circumferential direction; A splicing groove is provided between two adjacent abutment pieces, and a conical throttling surface is provided at the position of the inner hole of the inlet end corresponding to the plurality of abutment pieces; Ends of the plurality of abutment sheets abut against the conical throttling surface, and the medium in the second passage is guided through the conical throttling surface, passes through the splicing groove, and converges into the first passage; The guide tube slides toward the valve seat, and the conical throttling surface causes the ends of the plurality of abutment sheets to gather inward, and two adjacent abutment sheets are located at the edge of the splicing groove and fit together to form a closed loop edge at the end.

[0009] Furthermore, a projection range of the closed-loop edge along the axial direction is smaller than a projection range of the first passage along the axial direction.

[0010] Furthermore, a transition arc surface is provided on the end surface of the inlet end corresponding to the inclined drainage surface; A step groove is provided at the end position of the transition arc surface.

[0011] Furthermore, a positioning shaft is provided on the end surface of the connector facing the connector seat; A positioning protrusion is provided in the circumferential direction of the positioning shaft, and the length of the positioning protrusion is smaller than the length of the positioning shaft.

[0012] Furthermore, a sealing ring is provided at the end of the positioning shaft.

[0013] The present invention also provides a control method for a pressure regulating solenoid valve, comprising the following steps: When the electromagnetic coil is not energized, the end of the flow guide tube is not affected by the electromagnetic force and is maintained at the initial position by the elastic member. A portion of the medium enters the inlet end of the valve seat through the first passage of the flow guide tube, while another portion of the medium enters the inlet end of the valve seat through the first annular flow guide cavity and the second annular flow guide cavity. When the pressure sensor installed at the outlet end of the valve seat detects that the pressure exceeds the set value, the control system energizes the electromagnetic coil. The magnetic field generated by the energization attracts the end of the guide tube to move toward the end face of the connector until the second passage is completely closed. When the second passage is closed, the medium can only enter the inlet end of the valve seat through the first passage; When the pressure sensor at the outlet of the valve seat detects that the pressure is lower than or equal to the set value, the electromagnetic coil is de-energized, and the end of the guide tube returns to its initial position under the action of the elastic member, opening the second passage; When the second passage is opened, part of the medium enters the inlet end of the valve seat through the first annular guide cavity and the second annular guide cavity, and another part of the medium enters the inlet end of the valve seat through the first passage, increasing the flow entering the inlet end of the valve seat.

[0014] The beneficial effects of the present invention are as follows: the present invention controls the position of the flow guide tube by energizing and de-energizing the electromagnetic coil, thereby controlling the flow and pressure of the medium, achieving precise pressure control, preventing excessive pressure from damaging the components in the electromagnetic valve body, and extending the service life of the electromagnetic valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 Schematic diagram of the structure of the pressure regulating solenoid valve in an embodiment of the present invention; Figure 2 Schematic cross-sectional view of a pressure regulating solenoid valve according to an embodiment of the present invention; Figure 3 Schematic diagram of the structure of the connector and the flow guide tube in an embodiment of the present invention; Figure 4 for Figure 2 A local enlarged view of point A; Figure 5 This is a schematic diagram of the position of the flow guide tube when the electromagnetic coil is energized in an embodiment of the present invention; Figure 6 Schematic diagram of the position of the flow guide tube when the electromagnetic coil is not energized in an embodiment of the present invention.

[0017] Figure markings: 1. Valve seat; 11. Inlet end; 11a. Conical throttling surface; 11b. Transition arc groove; 11c. Step groove; 12. Outlet end; 13. Valve port; 2. Solenoid valve assembly; 3. Pressure regulating assembly; 31. Connecting seat; 32. Connecting head; 321. Second step shaft; 322. Positioning shaft; 323. Positioning protrusion; 324. Sealing ring; 33. Guide tube; 331. Inclined guide surface; 332. First step shaft; 332a. Conical diversion surface; 3A. First annular guide cavity; 3B. Second annular guide cavity; 3C. First passage; 34. Elastic member; 35. Drainage tube; 36. Abutment plate; 4. Solenoid coil. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] like Figures 1 to 6 The pressure-regulating solenoid valve shown in FIG. 1 includes a valve seat 1 having an inlet end 11 and an outlet end 12, with a valve port 13 disposed in the middle; a solenoid valve assembly 2 disposed above the valve port 13; a pressure-regulating assembly 3 connected to the inlet end 11 of the valve seat 1, comprising a connecting seat 31 connected to the inlet end 11, a connector 32 connected to the connecting seat 31 away from the inlet end 11, and a flow guide tube 33 disposed within the connecting seat 31; A first annular guide cavity 3A is formed between the inner wall of the connecting seat 31 and the guide tube 33. A plurality of guide grooves are provided on the inner wall of the connecting seat 31. The guide tube 33 is provided with a plurality of guide sliders distributed along the circumference thereof corresponding to the plurality of guide grooves. Elastic members 34 are provided at both ends of the guide sliders. The guide tube 33 is provided with a first passage 3C along its axis. An end of the guide tube 33 away from the connector 32 extends to form a guide tube 35. The guide tube 35 and the inner wall of the inlet end 11 form a second annular guide cavity 3B. The first annular guide cavity 3A and the second annular guide cavity 3B are connected to form a second passage. An electromagnetic coil 4 is provided outside the connection seat 31 . When the electromagnetic coil 4 is energized, the end of the flow guide tube 33 abuts against the end surface of the connection head 32 to control the closing of the second passage.

[0022] In the preferred embodiment of the present invention, the electromagnetic coil 4 is de-energized in the initial state. The end of the flow guide tube 33 is not affected by the electromagnetic force and is held in its initial position by the elastic member 34. A portion of the medium enters the inlet end 11 of the valve seat 1 through the first passage 3C of the flow guide tube 33, while another portion of the medium enters the inlet end 11 of the valve seat 1 through the first annular flow guide cavity 3A and the second annular flow guide cavity 3B. When the pressure sensor at the outlet end 12 of the valve seat 1 detects that the pressure exceeds a set value, the control system energizes the electromagnetic coil 4. The magnetic field generated by the energization attracts the end of the flow guide tube 33 toward the end surface of the connector 32 until the second passage is completely closed. Once the second passage is closed, the medium can only enter the inlet end 11 of the valve seat 1 through the first passage 3C. The flow rate entering the inlet end 11 of the valve seat 1 is controlled, thereby indirectly controlling the pressure at the outlet end 12 of the valve seat 1. If the pressure at the outlet end 12 is too high, the electromagnetic coil 4 is energized, reducing the flow rate and thereby lowering the pressure. If the pressure at the outlet end 12 is too low, the electromagnetic coil 4 is de-energized, increasing the flow rate and thereby raising the pressure.

[0023] The present invention controls the position of the flow guide tube 33 by energizing and deenergizing the electromagnetic coil 4, thereby controlling the flow and pressure of the medium, achieving precise pressure control, preventing excessive pressure from damaging components in the electromagnetic valve body, and extending the service life of the electromagnetic valve.

[0024] The system can automatically adjust the state of the electromagnetic coil 4 according to the feedback from the pressure sensor to meet the actual pressure requirements. This automation capability reduces manual intervention and improves the system's response speed and control accuracy.

[0025] The flow guide tube 33 is circumferentially provided with multiple guide sliders corresponding to the multiple guide slots, and elastic members 34 are provided at both ends of the guide sliders. This design makes the flow guide tube 33 more stable during axial movement. At the same time, the elastic members 34 provide the necessary restoring force, ensuring that the flow guide tube 33 can quickly return to its original position after movement, ensuring accurate flow control.

[0026] In a preferred embodiment of the present invention, the guide tube 33 is provided with an inclined guide surface 331 at the transition surface between the first annular guide cavity 3A and the second annular guide cavity 3B.

[0027] The guide tube 33 is provided with an inclined guide surface 331 at the transition surface between the first annular guide cavity 3A and the second annular guide cavity 3B, which can optimize the fluid flow characteristics, reduce energy loss, improve the mixing effect, reduce flow resistance, enhance the uniformity of the flow field, reduce the impact force on the wall, and optimize the pressure distribution, thereby improving the efficiency and performance of the entire system; by changing the flow cross-section between the inclined guide surface 331 and the inlet end 11, the flow of the second passage can be adjusted, achieving the dual effect of drainage and throttling.

[0028] In a preferred embodiment of the present invention, the surfaces of the flow guide tube 33 and the connector 32 are provided with a first stepped shaft section 332 and a second stepped shaft 321. The ends of the elastic member 34 are respectively sleeved onto the first and second stepped shafts 332, 321, ensuring that the elastic member 34 remains correctly positioned during installation and use. Furthermore, the distance between the first and second stepped shafts 332, 321 is less than the compression of the elastic member 34. When the elastic member 34 is compressed, the end of the flow guide tube 33 tightly abuts the end surface of the connector 32, thereby reliably closing the first passage 3C.

[0029] Based on the above embodiment, the end surface of the first stepped shaft 332 is provided with a conical diverter surface 332a. This diverts the medium flowing out of the connector 32 to the first annular guide cavity 3A, helping to smooth the flow path of the fluid, reduce turbulence and eddy currents during the diversion process, and ensure the stability of the medium flow.

[0030] Since the flow guide tube 33 is energized by the electromagnetic coil 4 and passively contacts the connector 32 to close the second passage, during passive control, if the electromagnetic coil 4 fails to energize in time, high pressure may occur inside the solenoid valve, causing damage to the interior of the solenoid valve. Therefore, in order to reduce the safety risks caused by the failure of the electromagnetic coil 4, the end of the flow guide tube 35 is provided with multiple abutment plates 36 along the circumferential direction; a splicing groove is provided between two adjacent abutment plates 36, and a conical throttling surface 11a is provided at the position of the multiple abutment plates 36 in the inner hole of the inlet end 11; the ends of the multiple abutment plates 36 abut on the conical throttling surface 11a, and the medium in the second passage is guided through the conical throttling surface 11a, through the splicing groove, and converges into the first passage 3C; When the inlet pressure of the flow guide tube 33 is greater than the outlet pressure, the flow guide tube 33 slides toward the valve seat 1, and the conical throttling surface 11a causes the ends of the multiple abutment plates 36 to converge inward, so that two adjacent abutment plates 36 are located at the edge of the splicing groove and fit together to form a closed loop edge at the end. By controlling the medium flow through the conical throttling surface 11a and the inclined guide surface 331 of the flow guide tube 33, more precise flow regulation can be achieved, improving control accuracy. The outer surfaces of the multiple abutment plates 36 fit together with the conical throttling surface 11a to close the splicing groove, further actively controlling the closure of the second passage. The active control method can respond to pressure changes more quickly, and the movement of the flow guide tube 33 is directly driven by fluid pressure, without waiting for the response of the electromagnetic coil 4, which can reduce the response time of the system.

[0031] Compared with passive control, active control methods provide higher reliability, safety, response speed and control accuracy, while reducing energy consumption and maintenance costs and enhancing the adaptability of the system.

[0032] As a preference of the above embodiment, the axial projection range of the closed loop edge is smaller than the axial projection range of the first passage 3C, further reducing the flow cross section of the first passage 3C, thereby controlling the flow rate entering the inlet end 11 .

[0033] In a preferred embodiment of the present invention, a transition arc surface is provided on the end surface of inlet end 11 at a position corresponding to inclined flow guide surface 331; a stepped groove 11c is provided at the distal end of the transition arc surface. The provision of the transition arc surface and stepped groove 11c can smooth fluid flow, reduce energy loss during turns or diversions, and improve fluid dynamics.

[0034] In a preferred embodiment of the present invention, a positioning shaft 322 is provided on the end surface of the connector 32 facing the connector seat 31 ; a positioning protrusion 323 is provided on the circumferential direction of the positioning shaft 322 , and the length of the positioning protrusion 323 is smaller than the length of the positioning shaft 322 .

[0035] The design of the positioning shaft 322 and the positioning protrusion 323 can improve the assembly accuracy of the solenoid valve and ensure the correct alignment between the connector 32 and the connector seat 31. The length of the positioning protrusion 323 is less than the length of the positioning shaft 322. This design can provide a stable positioning effect and prevent the connector 32 from shifting or rotating during operation, thereby enhancing the positioning stability.

[0036] On the basis of the above embodiment, a sealing ring 324 is provided at the end of the positioning shaft 322 to ensure the sealing of the first annular guide cavity 3A.

[0037] The present invention also provides a control method for a pressure regulating solenoid valve, comprising the following steps: When the electromagnetic coil 4 is not energized, the end of the flow guide tube 33 is not affected by the electromagnetic force and is held in its initial position by the elastic member 34. A portion of the medium enters the inlet end 11 of the valve seat 1 through the first passage 3C of the flow guide tube 33, while another portion of the medium enters the inlet end 11 of the valve seat 1 through the first annular flow guide cavity 3A and the second annular flow guide cavity 3B. When the pressure sensor at the outlet end 12 of the valve seat 1 detects that the pressure exceeds the set value, the control system energizes the electromagnetic coil 4. The magnetic field generated by the energization attracts the end of the flow guide tube 33 to move toward the end surface of the connector 32 until the second passage is completely closed. When the second passage is closed, the medium can only enter the inlet end 11 of the valve seat 1 through the first passage 3C; When the pressure sensor at the outlet end 12 of the valve seat 1 detects that the pressure is lower than or equal to the set value, the electromagnetic coil 4 is de-energized, and the end of the flow guide tube 33 returns to its initial position under the action of the elastic member 34, opening the second passage. When the second passage is opened, part of the medium enters the inlet end 11 of the valve seat 1 through the first annular guide cavity 3A and the second annular guide cavity 3B, and another part of the medium enters the inlet end 11 of the valve seat 1 through the first passage 3C, thereby increasing the flow rate entering the inlet end 11 of the valve seat 1.

[0038] By controlling the flow rate entering the inlet port 11 of the valve seat 1, the pressure at the outlet port 12 of the valve seat 1 is indirectly controlled. If the pressure at the outlet port 12 is too high, the flow rate is reduced to lower the pressure; if the pressure at the outlet port 12 is too low, the flow rate is increased to raise the pressure. The pressure-regulating solenoid valve precisely controls the pressure at the outlet port 12 of the valve seat 1, ensuring stable operation of the fluid system under various operating conditions. This control method combines the retention of the elastic member 34 with electromagnetic control, improving the system's response speed and control accuracy.

[0039] Those skilled in the art will appreciate that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure regulating solenoid valve, characterized in that: include: A valve seat having an inlet end and an outlet end, and a valve port is arranged at a middle position; A solenoid valve assembly is arranged above the valve port; A pressure regulating assembly connected to the inlet end of the valve seat, comprising a connecting seat connected to the inlet end, a connecting head connected to the connecting seat away from the inlet end, and a flow guide pipe located in the connecting seat; A first annular flow guiding cavity is formed between the inner wall of the connecting seat and the flow guiding pipe, and a plurality of guide sliding grooves are arranged on the inner side wall of the connecting seat. The flow guiding pipe is provided with a plurality of guide sliding blocks distributed corresponding to the plurality of guide sliding grooves along the circumferential direction, and elastic members are arranged at both ends of the guide sliding blocks. The guide pipe is provided with a first passage along the axis, the guide pipe extends from one end away from the connector to form a guide pipe, the guide pipe and the inner hole wall of the inlet end form a second annular guide cavity, and the first annular guide cavity and the second annular guide cavity are connected to form a second passage; An electromagnetic coil is arranged outside the connection seat. When the electromagnetic coil is energized, the end of the flow guide tube abuts against the end surface of the connection head to control the closing of the second passage.

2. The pressure regulating solenoid valve according to claim 1, characterized in that: The guide tube is provided with an inclined guide surface at a transition surface between the first annular guide cavity and the second annular guide cavity.

3. The pressure regulating solenoid valve according to claim 1, characterized in that: The opposite surfaces of the guide pipe and the connector are provided with a first step shaft section and a second step shaft, and the two ends of the elastic member are respectively sleeved on the first step shaft and the second step shaft.

4. The pressure regulating solenoid valve according to claim 3, characterized in that: The end surface of the first step shaft section is provided with a conical flow dividing surface.

5. The pressure regulating solenoid valve according to claim 1, characterized in that: The end of the drainage tube is provided with a plurality of abutment sheets along the circumferential direction; A splicing groove is provided between two adjacent abutment sheets, and a conical throttling surface is provided at the position of the inner hole at the inlet end corresponding to the plurality of abutment sheets; The ends of the plurality of abutment sheets abut against the conical throttling surface, and the medium in the second passage is guided through the conical throttling surface, passes through the splicing groove, and converges into the first passage; The guide tube slides toward the valve seat, and the conical throttling surface causes the ends of the plurality of abutment sheets to gather inward, and two adjacent abutment sheets are located at the edge of the splicing groove and fit together to form a closed loop edge at the end.

6. The pressure regulating solenoid valve according to claim 5, characterized in that: The projection range of the closed-loop edge along the axial direction is smaller than the projection range of the first passage along the axial direction.

7. The pressure regulating solenoid valve according to claim 2, characterized in that: The end surface of the inlet end is provided with a transition arc surface at a position corresponding to the inclined drainage surface; A step groove is arranged at the end position of the transition arc surface.

8. The pressure regulating solenoid valve according to claim 1, characterized in that: The end surface of the connector facing the connector seat is provided with a positioning shaft; A positioning protrusion is provided in the circumferential direction of the positioning shaft, and the length of the positioning protrusion is smaller than the length of the positioning shaft.

9. The pressure regulating solenoid valve according to claim 8, characterized in that: A sealing ring is provided at the end of the positioning shaft.

10. The control method of the pressure regulating solenoid valve according to any one of claims 1 to 9, characterized in that: The following steps are involved: The electromagnetic coil is not energized, the end of the flow guide tube is not affected by the electromagnetic force, and is kept in the initial position by the elastic member. A part of the medium enters the inlet end of the valve seat through the first passage of the flow guide tube, and another part of the medium enters the inlet end of the valve seat through the first annular flow guide cavity and the second annular flow guide cavity; When the pressure sensor installed at the outlet end of the valve seat detects that the pressure exceeds the set value, the control system energizes the electromagnetic coil, and the magnetic field generated by the energization attracts the end of the guide tube to move toward the end face of the connector until the second passage is completely closed; When the second passage is closed, the medium can only enter the inlet end of the valve seat through the first passage; When the pressure sensor arranged at the outlet end of the valve seat detects that the pressure is lower than or equal to the set value, the electromagnetic coil is powered off, and the end of the guide tube returns to the initial position under the action of the elastic member, opening the second passage; When the second passage is opened, part of the medium enters the inlet end of the valve seat through the first annular guide cavity and the second annular guide cavity, and another part of the medium enters the inlet end of the valve seat through the first passage, increasing the flow entering the inlet end of the valve seat.

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