Electromagnetic proportional valve

Abstract

The utility model belongs to the technical field of proportional valves, and particularly relates to an electromagnetic proportional valve which comprises a shell, a static iron, a coil, a spring, a movable iron, a valve element and a stabilizing piece, an installation cavity is formed in the shell, the static iron is installed in the installation cavity and connected with the shell, the coil is wound on the peripheral face of the shell, and the movable iron is arranged in the installation cavity and connected with the valve element. The valve element is connected with the end, away from the static iron, of the movable iron, the spring is connected between the movable iron and the static iron, the shell is further provided with a liquid cavity, an inflow channel and an outflow channel, the liquid cavity is formed in the side, away from the static iron, of the valve element, the end, away from the movable iron, of the valve element extends into the liquid cavity, and the inflow channel and the outflow channel are both communicated with the liquid cavity. The stabilizing piece is arranged in the mounting cavity, the moving iron is connected with the stabilizing piece, and the stabilizing piece can limit the moving iron in the radial direction of the moving iron. Radial shaking of the moving iron in the mounting cavity is avoided, stability of the moving iron is improved, collision abrasion between the moving iron and the cavity wall of the mounting cavity is prevented, operation stability of the electromagnetic proportional valve is improved, and the service life of the electromagnetic proportional valve is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of proportional valves, and particularly relates to an electromagnetic proportional valve. Background Art

[0002] An electromagnetic proportional valve is a hydraulic control device that can continuously control the fluid pressure, flow rate or direction according to the input electrical signal. It can convert the input electrical signal into force or displacement in proportion, so as to achieve precise control of fluid flow.

[0003] An existing electromagnetic proportional valve includes a housing, a stationary iron core, a coil, a spring, a moving iron core and a valve core. The stationary iron core and the moving iron core are installed in the housing, the coil is wound around the housing, the moving iron core is connected to the stationary iron core through the spring, the valve core is connected to the moving iron core, and an inlet flow channel and an outlet flow channel are also provided on the housing. When the coil is energized, the coil will generate a magnetic field. Under the drive of the magnetic force, the valve core moves towards the stationary iron core with the moving iron core. The elastic force of the spring balances the magnetic force, and the valve core remains in the state of opening the inlet flow channel. The external liquid enters the electromagnetic proportional valve through the inlet flow channel and is discharged to the outside through the outlet flow channel. By changing the magnitude of the coil current, the moving distance of the moving iron core is changed, and then the opening degree of the outlet flow channel is changed, and the flow rate of the outlet flow channel is changed.

[0004] In the existing electromagnetic proportional valve, when the moving iron core moves in the housing under the action of the magnetic force, radial shaking will occur, resulting in collision and wear between the moving iron core and the housing. Summary of the Invention

[0005] The technical problem to be solved by the utility model is: aiming at the problem that the moving iron core of the existing electromagnetic proportional valve generates radial shaking in the installation cavity, an electromagnetic proportional valve is provided.

[0006] To solve the above technical problem, an embodiment of the utility model provides an electromagnetic proportional valve, which includes a housing, a stationary iron core, a coil, a spring, a moving iron core, a valve core and a stabilizing member. An installation cavity is provided on the housing, the stationary iron core is installed in the installation cavity and is connected to the housing, the coil is wound around the outer peripheral surface of the housing, the moving iron core is arranged in the installation cavity, the valve core is connected to one end of the moving iron core away from the stationary iron core, and the spring is connected between the moving iron core and the stationary iron core;

[0007] A liquid cavity, an inlet flow channel and an outlet flow channel are further provided in the housing. The liquid cavity is arranged on the side of the valve core away from the stationary iron core, one end of the valve core away from the moving iron core extends into the liquid cavity, and both the inlet flow channel and the outlet flow channel are communicated with the liquid cavity;

[0008] The stabilizing member is arranged in the installation cavity, the moving iron core is connected to the stabilizing member, and the stabilizing member can limit the moving iron core in the radial direction of the moving iron core.

[0009] Optionally, the stator includes a first stator and a second stator. The second stator is located between the first stator and the mover. The second stator is connected to one end of the first stator close to the mover. The first stator is provided with a spring cavity. One end of the spring away from the mover is connected to the cavity wall of the spring cavity away from the mover. The stabilizing member is a guiding piece, and the guiding piece is provided with a first through hole;

[0010] The mover includes a connected guiding portion and a main body portion. The second stator is provided with a second through hole. One end of the guiding portion away from the main body portion passes through the second through hole and extends into the spring cavity. The guiding portion is inserted into the first through hole. The outer periphery of the guiding portion is connected to the hole wall of the first through hole. The outer periphery of the guiding piece is connected to the cavity wall of the spring cavity.

[0011] Optionally, a guiding piece installation cavity is provided between the first stator and the second stator. The guiding piece is installed in the guiding piece installation cavity. One side of the spring close to the mover is connected to one side of the guiding piece facing away from the main body portion. The spring drives the mover to move through the guiding piece.

[0012] Optionally, the guiding piece is a first elastic piece. The outer periphery of the first elastic piece is connected to the cavity wall of the guiding piece installation cavity. When the spring contracts, it pulls the first elastic piece to deform, and the first elastic piece pulls the guiding portion to extend into the spring cavity.

[0013] Optionally, both the guiding portion and the main body portion are cylindrical. The diameter of the guiding portion is smaller than the diameter of the main body portion. One end face of the main body portion close to the second stator forms a stopping end face, and the stopping end face is in stopping cooperation with one side of the second stator facing away from the first stator.

[0014] Optionally, it further includes a metal retaining piece. The metal retaining piece is sleeved on the guiding portion, and one side of the metal retaining piece facing away from the stopping end face is connected to one side of the second stator facing away from the first stator.

[0015] Optionally, one end of the main body portion away from the guiding portion is provided with a mounting hole. The valve core includes a connected connecting portion, a blocking portion and a sealing gasket. The connecting portion is press-fitted and inserted into the mounting hole. One end of the blocking portion away from the connecting portion is provided with a sealing groove, and the sealing gasket is installed in the sealing groove.

[0016] Optionally, the inflow channel is arranged between the outflow channel and the liquid chamber. A valve head is provided at one end of the outflow channel close to the liquid chamber. The valve head is inserted into the outflow channel. The valve head is provided with an outflow hole, and the outflow hole communicates the liquid chamber with the outflow channel. One end of the valve head close to the valve core extends out of the outflow channel.

[0017] Optionally, it further includes a second elastic sheet. A third through hole is provided on the second elastic sheet. The connecting portion is inserted into the third through hole. The outer periphery of the connecting portion is connected to the hole wall of the third through hole. The outer periphery of the second elastic sheet is connected to the wall of the liquid chamber.

[0018] Optionally, it further includes a static iron adjusting assembly. The static iron adjusting assembly is connected to the housing. The first static iron is connected to the static iron adjusting assembly. The static iron adjusting assembly is used to adjust the length of the static iron extending into the installation cavity.

[0019] In the electromagnetic proportional valve according to the embodiment of the present invention, the stabilizing member is arranged in the installation cavity. The stabilizing member limits the moving iron in the radial direction in the installation cavity, preventing the moving iron from radially swaying in the installation cavity when moving, improving the stability of the moving iron during movement, preventing the moving iron from colliding and rubbing against the wall of the installation cavity, and improving the operating stability and service life of the electromagnetic proportional valve. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the electromagnetic proportional valve provided by an embodiment of the present invention;

[0021] Figure 2 is Figure 1 the A-A sectional view of.

[0022] The reference numerals in the specification are as follows: 1. First housing; 2. Second housing; 3. Third housing; 4. Coil; 5. Nut; 6. Adjustable rod; 7. Second sealing ring; 8. First static iron; 9. Spring cavity; 10. Spring; 11. Installation cavity; 12. Guide piece installation cavity; 13. First elastic sheet; 14. First through hole; 15. Moving iron; 16. Guide portion; 17. Main body portion; 18. Second static iron; 19. Second through hole; 20. Stopping end face; 21. Metal retaining piece; 22. Retaining ring platform; 23. Installation hole; 24. Valve core; 25. Connecting portion; 26. First sealing ring; 27. Second elastic sheet; 28. Third through hole; 29. Installation table; 30. Sealing portion; 31. Sealing groove; 32. Sealing gasket; 33. Valve head; 34. Outflow hole; 35. Inflow channel; 36. Outflow channel; 37. Liquid chamber. Detailed Embodiments

[0023] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] As Figures 1 to 2 shown, an embodiment of the present utility model provides an electromagnetic proportional valve, which includes a housing, a static iron, a coil 4, a spring 10, a moving iron 15, a valve core 24 and a stabilizing member. An installation cavity 11 is provided on the housing. The static iron is installed in the installation cavity 11 and is connected to the housing. The coil 4 is wound around the outer peripheral surface of the housing. The moving iron 15 is arranged in the installation cavity 11. The valve core 24 is connected to one end of the moving iron 15 away from the static iron. The spring 10 is connected between the moving iron 15 and the static iron.

[0025] A liquid cavity 37, an inflow channel 35 and an outflow channel 36 are further provided in the housing. The liquid cavity 37 is arranged on the side of the valve core 24 away from the static iron. One end of the valve core 24 away from the moving iron 15 extends into the liquid cavity 37. Both the inflow channel 35 and the outflow channel 36 are communicated with the liquid cavity 37.

[0026] The stabilizing member is arranged in the installation cavity 11. The moving iron 15 is connected to the stabilizing member. The stabilizing member can limit the moving iron 15 in the radial direction of the moving iron 15.

[0027] In one embodiment, the static iron includes a first static iron 8 and a second static iron 18. The second static iron 18 is located between the first static iron 8 and the moving iron 15. The second static iron 18 is connected to one end of the first static iron 8 close to the moving iron 15. The first static iron 8 is provided with a spring cavity 9. One end of the spring 10 away from the moving iron 15 is connected to the cavity wall of the spring cavity 9 away from the moving iron 15. The stabilizing member is a guide piece, and the guide piece is provided with a first through hole 14.

[0028] In this embodiment, the direction in which the moving iron 15 moves under the action of magnetic force is defined as the up and down direction. The opening of the spring cavity 9 faces downward. The spring 10 is located in the spring cavity 9. The upper end of the spring 10 is connected to the cavity top wall of the spring cavity 9. The spring 10 can be compressed and restored in the spring cavity 9.

[0029] The moving iron 15 includes a connected guiding portion 16 and a main body portion 17. A second perforation 19 is provided on the second static iron 18. One end of the guiding portion 16 away from the main body portion 17 passes through the second perforation 19 and extends into the spring cavity 9. The guiding portion 16 is inserted into the first perforation 14, and the outer periphery of the guiding portion 16 is connected to the hole wall of the first perforation 14. The outer periphery of the guiding piece is connected to the cavity wall of the spring cavity 9.

[0030] One end of the guiding portion 16 away from the main body passes upward through the second perforation 19. The guiding portion 16 is connected to the guiding piece. When the moving iron 15 moves downward, the guiding portion 16 moves downward in the second perforation 19. When the moving iron 15 moves upward, the guiding portion 16 moves upward in the second perforation 19.

[0031] The outer periphery of the guiding piece is connected to the spring cavity 9. The hole wall of the first perforation 14 of the guiding piece is connected to the outer periphery of the guiding portion 16. The guiding piece fills the annular gap between the guiding portion 16 and the spring cavity 9. When the moving iron 15 moves, the guiding piece limits the guiding portion 16 of the moving iron 15 to prevent radial shaking of the guiding portion 16, thereby limiting the entire moving iron 15.

[0032] In one embodiment, a guiding piece installation cavity 12 is provided between the first static iron 8 and the second static iron 18. The guiding piece is installed in the guiding piece installation cavity 12. One side of the spring 10 close to the moving iron 15 is connected to one side of the guiding piece facing away from the main body portion 17. The spring 10 drives the moving iron 15 to move through the guiding piece.

[0033] One side of the guiding piece facing away from the main body portion 17 is connected to the spring 10, that is, the bottom end of the spring 10 presses on the guiding piece and is connected to the guiding piece. When the moving iron 15 moves upward, the guiding portion 16 drives the guiding piece to move upward. The guiding piece compresses the spring 10 upward, so that the spring 10 generates a downward elastic force on the guiding piece. When the moving iron 15 moves downward, the guiding portion 16 drives the guiding piece to move downward. The guiding piece pulls the spring 10 downward. The outer periphery of the guiding portion 16 is connected to the hole wall of the second perforation 19, and the guiding piece can also limit the moving iron 15 during the downward stroke of the moving iron 15.

[0034] In one embodiment, the guiding piece is a first elastic piece 13. The outer periphery of the first elastic piece 13 is connected to the cavity wall of the guiding piece installation cavity 12. When the spring 10 contracts, it pulls the first elastic piece 13 to deform, and the first elastic piece 13 pulls the guiding portion 16 to extend into the spring cavity 9.

[0035] The guiding piece is a first elastic piece 13 with elasticity. The outer periphery of the guiding piece is connected to the wall of the guiding piece installation cavity 12. The first elastic piece 13 cannot move up and down and can only deform with the up and down movement of the guiding part 16, which can further improve the movement stability of the moving iron 15.

[0036] In an embodiment, the guiding part 16 and the main body part 17 are both cylindrical. The diameter of the guiding part 16 is smaller than that of the main body part 17. An end face of the main body part 17 near one end of the second static iron 18 forms a stop end face 20, and the stop end face 20 is in stop fit with a side of the second static iron 18 facing away from the first static iron 8.

[0037] The stop fit between the stop end face 20 and the second static iron 18 can limit the upward movement stroke of the moving iron 15.

[0038] In an embodiment, it further includes a metal retaining piece 21. The metal retaining piece 21 is sleeved on the guiding part 16, and a side of the metal retaining piece 21 facing away from the stop end face 20 is connected to a side of the second static iron 18 facing away from the first static iron 8.

[0039] The housing includes a first housing 1, a second housing 2 and a third housing 3 connected in sequence from top to bottom. A first sealing ring 26 is hermetically arranged between the second housing 2 and the third housing 3 through a sealing ring to improve the sealing performance. The installation cavity 11 is arranged between the first housing 1 and the second housing 2, the liquid cavity 37 is arranged on the third housing 3, a stop ring platform 22 is arranged on the inner wall of the second housing 2, the upper side of the stop ring platform 22 is connected to the lower side of the second static iron 18, the lower side of the stop ring platform 22 faces the stop end face 20, and the lower side of the stop step is in stop fit with the stop end face 20.

[0040] The second housing 2 is made of copper. The metal retaining piece 21 is a copper retaining piece. The copper retaining piece is arranged between the stop ring platforms 22. The copper retaining piece and the stop ring platforms 22 together stop between the main body part 17 and the second static iron 18. The metal retaining piece 21 and the stop ring platforms 22 are both made of copper material, which can weaken the magnetic force received by the moving iron 15, reduce the movement speed of the moving iron 15, and reduce the impact force between the main body part 17 and the second static iron 18.

[0041] In an embodiment, an installation hole 23 is arranged at one end of the main body part 17 away from the guiding part 16. The valve core 24 includes a connected connecting part 25, a blocking part 30 and a sealing gasket 32. The connecting part 25 is press-fitted and inserted into the installation hole 23. A sealing groove 31 is arranged at one end of the blocking part 30 away from the connecting part 25, and the sealing gasket 32 is installed in the sealing groove 31.

[0042] The valve core 24 and the moving iron 15 are separately manufactured. The connecting portion 25 is press-fitted into the mounting hole 23. Both the blocking portion 30 and the connecting portion 25 are cylindrical. The diameter of the blocking portion 30 is greater than that of the connecting portion 25. The upper end surface of the blocking portion 30 is in contact with the lower end surface of the moving iron 15. During assembly, the connecting portion 25 can be directly press-fitted into the mounting hole 23, greatly reducing the manufacturing difficulty.

[0043] In one embodiment, the inlet flow channel 35 is disposed between the outlet flow channel 36 and the liquid chamber 37. A valve head 33 is provided at one end of the outlet flow channel 36 close to the liquid chamber 37. The valve head 33 is inserted into the outlet flow channel 36. An outlet hole 34 is provided on the valve head 33. The outlet hole 34 communicates the liquid chamber 37 and the outlet flow channel 36. One end of the valve head 33 close to the valve core 24 extends out of the outlet flow channel 36.

[0044] The upper end of the valve head 33 protrudes upward out of the outlet flow channel 36. The sealing gasket 32 is supported by a rubber-like structure. When the valve core 24 descends with the moving iron 15, the sealing gasket 32 presses on the valve head 33 to close the outlet hole 34 of the valve head 33.

[0045] In one embodiment, the electromagnetic proportional valve further includes a second elastic sheet 27. A third through hole 28 is provided on the second elastic sheet 27. The connecting portion 25 is inserted into the third through hole 28. The outer periphery of the connecting portion 25 is connected to the hole wall of the third through hole 28. The outer periphery of the second elastic sheet 27 is connected to the wall of the liquid chamber 37.

[0046] The second elastic sheet 27 is sleeved on the connecting portion 25. The upper side of the second elastic sheet 27 is in contact with the lower end of the main body portion 17. The lower side of the second elastic sheet 27 is in contact with the upper end surface of the blocking portion 30, that is, the second elastic sheet 27 is clamped between the main body portion 17 and the blocking portion 30. An installation table 29 is further provided on the wall of the liquid chamber 37. The edge of the second elastic sheet 27 is seated on the installation table 29, and the edge of the second elastic sheet 27 is clamped between the installation table 29 and the second housing 2.

[0047] In one embodiment, it further includes a static iron adjusting assembly. The static iron adjusting assembly is connected to the housing. The first static iron 8 is connected to the static iron adjusting assembly. The static iron adjusting assembly is used to adjust the length of the static iron extending into the installation cavity 11.

[0048] The static iron adjusting assembly includes an adjusting rod and a nut 5. The adjusting rod is inserted into the spring cavity 9 from top to bottom. The upper end of the spring 10 is connected to the lower end of the adjusting rod. A second sealing ring 7 is provided between the adjusting rod and the first static iron 8. Threads are provided on the outer periphery of the upper end of the first static iron 8. The nut 5 adjusts the depth of the first static iron 8 entering the installation cavity 11, so as to adjust the movement stroke of the moving iron 15 according to the actual situation.

[0049] For the electromagnetic proportional valve according to the embodiment of the present invention, its working principle is as follows: After the coil 4 is energized, the coil 4 will generate a magnetic field. Under the action of the magnetic field, the moving iron 15 moves upward. The moving iron 15 drives the valve core 24 to move upward. At this time, the spring 10 is compressed by the guide piece. The spring 10 generates a downward acting force on the guide piece and the moving iron 15. The upward acting force generated by the magnetic field on the moving iron 15 is balanced with the sum of the downward elastic force generated by the spring 10 on the moving iron 15 and the gravity of the moving iron 15, so that the moving iron 15 remains stationary to ensure the opening between the valve core 24 and the valve head 33. The external liquid enters the liquid cavity 37 through the inlet flow channel 35 and flows out of the liquid cavity 37 from the valve head 33 and the discharge through passage. When the current of the coil 4 is changed, the position of the moving iron 15 in the installation cavity 11 will change. Under the combined action of the elastic force, magnetic force and gravity, the moving iron 15 reaches a new balance, changing the distance between the valve core 24 and the valve head 33, thereby changing the liquid flow rate of the outlet flow channel 36.

[0050] For the electromagnetic proportional valve according to the embodiment of the present invention, the stabilizing member is arranged in the installation cavity 11. The stabilizing member limits the moving iron 15 in the radial direction in the installation cavity 11 to avoid radial shaking of the moving iron 15 in the installation cavity 11 when it moves, improve the stability of the moving iron 15 during movement, prevent the moving iron 15 from colliding and rubbing against the cavity wall of the installation cavity 11, and improve the operation stability and service life of the electromagnetic proportional valve.

[0051] In other embodiments, the first elastic piece 13 can move up and down in the guide piece installation cavity 12.

[0052] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electromagnetic proportional valve, characterized in that: The invention comprises a housing, a stationary iron, a coil (4), a spring (10), a moving iron (15), a valve core (24) and a stabilizing member, wherein the housing is provided with a mounting cavity (11), the stationary iron is mounted in the mounting cavity (11) and is connected to the housing, the coil (4) is wound on the outer peripheral surface of the housing, the moving iron (15) is arranged in the mounting cavity (11), the valve core (24) is connected to an end of the moving iron (15) away from the stationary iron, and the spring (10) is connected between the moving iron (15) and the stationary iron; A liquid chamber (37), an inlet channel (35) and an outlet channel (36) are further provided in the housing. The liquid chamber (37) is provided on a side of the valve core (24) away from the stationary iron. An end of the valve core (24) away from the moving iron (15) extends into the liquid chamber (37). Both the inlet channel (35) and the outlet channel (36) are in communication with the liquid chamber (37). The stabilizing member is arranged in the installation cavity (11), the moving iron (15) is connected to the stabilizing member, and the stabilizing member can limit the moving iron (15) in the radial direction of the moving iron (15).

2. The electromagnetic proportional valve according to claim 1, characterized in that: The stationary iron comprises a first stationary iron (8) and a second stationary iron (18), the second stationary iron (18) being located between the first stationary iron (8) and the moving iron (15), the second stationary iron (18) being connected to an end of the first stationary iron (8) close to the moving iron (15), the first stationary iron (8) being provided with a spring cavity (9), an end of the spring (10) away from the moving iron (15) being connected to a cavity wall of an end of the spring cavity (9) away from the moving iron (15), the stabilizing member being a guide plate, the guide plate being provided with a first through hole (14); The moving iron (15) comprises a guide portion (16) and a main body (17) which are connected to each other. A second through hole (19) is provided on the second stationary iron (18). An end of the guide portion (16) away from the main body (17) passes through the second through hole (19) and extends into the spring cavity (9). The guide portion (16) is inserted into the first through hole (14). The outer periphery of the guide portion (16) is connected to the hole wall of the first through hole (14), and the outer periphery of the guide sheet is connected to the cavity wall of the spring cavity (9).

3. The electromagnetic proportional valve according to claim 2, characterized in that: A guide plate installation cavity (12) is provided between the first stationary iron (8) and the second stationary iron (18), and the guide plate is installed in the guide plate installation cavity (12). The side of the spring (10) close to the moving iron (15) is connected to the side of the guide plate facing away from the main body (17), and the spring (10) drives the moving iron (15) to move through the guide plate.

4. The electromagnetic proportional valve according to claim 3, characterized in that: The guide piece is a first spring piece (13), the outer periphery of the first spring piece (13) is connected to the cavity wall of the guide piece installation cavity (12), and when the spring (10) contracts, it pulls the first spring piece (13) to deform, and the first spring piece (13) pulls the guide portion (16) to extend into the spring cavity (9).

5. The electromagnetic proportional valve according to claim 2, characterized in that: The guide portion (16) and the main body (17) are both cylindrical, the diameter of the guide portion (16) is smaller than the diameter of the main body (17), and the end surface of one end of the main body (17) close to the second stationary iron (18) forms a stop end surface (20), and the stop end surface (20) is in stop cooperation with a side of the second stationary iron (18) facing away from the first stationary iron (8).

6. The electromagnetic proportional valve according to claim 5, characterized in that: It also comprises a metal baffle (21), wherein the metal baffle (21) is sleeved on the guide portion (16), and a side of the metal baffle (21) facing away from the stop end surface (20) is connected to a side of the second stationary iron (18) facing away from the first stationary iron (8).

7. The electromagnetic proportional valve according to claim 2, characterized in that: An installation hole (23) is provided at one end of the main body (17) away from the guide portion (16); the valve core (24) comprises a connecting portion (25), a blocking portion (30) and a sealing gasket (32) which are connected to each other; the connecting portion (25) is interference-fitted into the installation hole (23); an end of the blocking portion (30) away from the connecting portion (25) is provided with a sealing groove (31); and the sealing gasket (32) is installed in the sealing groove (31).

8. The electromagnetic proportional valve according to claim 7, characterized in that: The inlet channel (35) is arranged between the outlet channel (36) and the liquid chamber (37); a valve head (33) is provided at one end of the outlet channel (36) close to the liquid chamber (37); the valve head (33) is inserted into the outlet channel (36); an outlet hole (34) is provided on the valve head (33); the outlet hole (34) connects the liquid chamber (37) and the outlet channel (36); and one end of the valve head (33) close to the valve core (24) extends out of the outlet channel (36).

9. The electromagnetic proportional valve according to claim 7, characterized in that: The invention also comprises a second elastic sheet (27), wherein a third through hole (28) is provided on the second elastic sheet (27), wherein the connecting portion (25) is inserted into the third through hole (28), wherein the outer periphery of the connecting portion (25) is connected to the hole wall of the third through hole (28), and the outer periphery of the second elastic sheet (27) is connected to the cavity wall of the liquid cavity (37).

10. The electromagnetic proportional valve according to claim 2, characterized in that: It also includes a stationary iron adjustment component, the stationary iron adjustment component is connected to the housing, the first stationary iron (8) is connected to the stationary iron adjustment component, and the stationary iron adjustment component is used to adjust the length of the stationary iron extending into the installation cavity (11).

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