Electromagnetic valve

Abstract

An electromagnetic valve comprises a valve body provided with a valve port used for medium circulation; the mounting seat is arranged on the valve body and is provided with a lifting channel which is through up and down; the movable iron core is arranged in the lifting channel in a lifting manner and is used for opening and closing the valve port; the device is characterized in that the device further comprises a manual part used for manual operation; a lifting channel is formed in the mounting seat, a mounting hole which is perpendicular to the lifting channel and is communicated with the lifting channel is further formed in the mounting seat, at least part of the manual part penetrates into the mounting hole to axially move along the mounting hole, the manual part and the movable iron core are in conical surface transmission fit, and the movable iron core is driven by the manual part to do lifting motion in the lifting channel. The manual part and the movable iron core are in conical surface transmission fit, the movable iron core is jacked up by utilizing the pushing force of inward movement of the manual part, and the angle of the conical surface is fixed, so that the force applied to the movable iron core by the manual part is stable in the valve opening process, and meanwhile, a designer can conveniently design an oblique angle into a relatively labor-saving angle.

Description

Technical Field

[0001] The invention relates to the technical field of solenoid valves, and in particular to a solenoid valve with a manual switch device. Background Art

[0002] In the field of solenoid valves, conventional solenoid valves use coils as power drive components. The solenoid valve opens when the power is on and closes when the power is off. In order to ensure safety and working conditions, some solenoid valves require that in addition to using the power supply as an on / off switch, the solenoid valve can still be opened and closed normally when the power is off or lost. Therefore, manual opening and closing devices for solenoid valves have emerged.

[0003] In the prior art, for example, a Chinese utility model patent with patent number ZL202321617163.5 (publication number CN220435566U) entitled "A solenoid valve with manual switching function" discloses a solenoid valve with manual switching function, wherein the solenoid valve comprises a manual base, a manual assembly is arranged on one side of the manual base, a manual knob is arranged on the manual assembly to cooperate with an eccentric torsion bar, so that after the solenoid valve is powered off, the user pushes the eccentric torsion bar into the valve to contact the moving iron core, and then rotates the manual knob to drive the moving iron core to move up and down to open or close the solenoid valve, thereby realizing manual control of the solenoid valve in the power-off state.

[0004] In the above patent, when the manual assembly opens the solenoid valve, the upward component of the force transmitted by the eccentric torsion bar to the moving iron core must be at least greater than the sum of the gravity of the moving iron core and the pressure difference on both sides of the valve port. In the process from opening the valve to the rising of the moving iron core, the angle between the direction of the rotational force applied by the operator to the manual knob and the horizontal plane keeps changing, and the rotational force is unstable. During the valve opening process, the moving iron core moves unsteadily and is prone to collide with the fixed iron core and damage internal components. In particular, the angle is basically zero when the moving iron core rises into place or opens the valve. This causes the operator to apply a rotational force to the manual knob that is much greater than the sum of the gravity of the moving iron core and the pressure difference on both sides of the valve port in order to open the solenoid valve. In particular, when the medium pressure in the valve body is high, it is very difficult and laborious for the operator to open the solenoid valve. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a solenoid valve that is more labor-saving for manual valve opening in view of the above-mentioned existing technical status, and is particularly suitable for the situation where there is a high-pressure medium in the valve body.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: the solenoid valve comprises: A valve body having a valve port for the flow of a medium; A mounting seat, arranged on the valve body, having a lifting passage extending vertically; A moving iron core is arranged in the lifting channel in a liftable manner and is used to open and close the valve port; It is characterized by: it also includes Manual parts, used for manual operation; The mounting seat is also provided with a mounting hole which is perpendicular to the lifting channel and connected to the lifting channel. The manual part at least partially penetrates into the mounting hole and moves axially along the mounting hole. The manual part and the moving iron core are matched with each other by conical transmission. The moving iron core performs lifting and lowering motion in the lifting channel based on the drive of the manual part.

[0007] In order to facilitate the user to drive the moving iron core, further, a first conical surface is formed at the inner end of the manual member, and the side wall of the moving iron core facing the first conical surface is partially recessed inward to form a second conical surface corresponding to the first conical surface. The inwardly recessed second conical surface allows the manual member to maintain a certain distance from the moving iron core when it is not extended into the lifting channel, thereby avoiding interference between the moving iron core and the manual member when the coil is energized; the matching relationship between the first conical surface and the second conical surface allows the moving iron core to rise or fall along the first conical surface, which is simple in structure and labor-saving.

[0008] Furthermore, a first oblique angle of the first conical surface relative to the axis of the manual member is in a range of 50 to 56 degrees, and a second oblique angle of the second conical surface relative to the axis of the moving iron core is in a range of 51 to 57 degrees.

[0009] In order to improve the safety of the solenoid valve when in use, the outer end of the manual part is provided with a manual knob exposed from the mounting hole, and the manual knob is provided with a connecting portion for connecting an external tool. The operator can operate the manual part by connecting the external tool to the connecting portion, thereby avoiding being scalded by the high-temperature medium in the valve body when manually operating the manual knob.

[0010] In order to enhance the stability of the connection between the connecting portion and the external tool, further, the connecting portion is a restraining groove provided on the outer end surface of the manual knob, and the external tool is at least partially restrained in the circumferential direction and placed in the restraining groove.

[0011] In order to facilitate the user to adjust the manual member, further, the manual member can be rotatably arranged in the mounting hole; The mounting seat is formed with a cylinder extending radially outwardly along the moving iron core at the periphery of the mounting hole, and a limiting sliding hole extending spirally along the axis direction of the cylinder is provided on the cylinder, and a limiting pin inserted into the limiting sliding hole is provided on the manual member. The manual member can move spirally inward along the limiting sliding hole, and the supporting force of the limiting sliding hole on the limiting pin inward can reduce the thrust required for the manual member to move inward, so that the user can save effort when pushing the manual member inward. In addition, the limiting pin inserted into the limiting sliding hole can display the moving position of the manual member, which is convenient for the user to judge the pushing depth of the manual member.

[0012] In order to stabilize the open state of the solenoid valve, further, a limit portion perpendicular to the axis of the cylinder is extended from the end of the limit slide hole. When the operator slides the limit pin to the end of the limit slide hole, the limit pin can be further slid into the limit portion for axial limit, so as to prevent the manual part from accidentally separating from the moving iron core after the valve port is opened, causing the valve port to be closed.

[0013] Furthermore, the helix angle of the limiting sliding hole is 70 degrees.

[0014] In order to facilitate the resetting of the manual member, further, an elastic member is provided between the manual member and the cylinder body, and the elastic member has a tendency to press the manual member outwardly along the axial direction of the mounting hole.

[0015] Compared with the prior art, the advantages of the present invention are: the solenoid valve in the present invention, the manual part used to drive the moving iron core and the conical transmission cooperation between the moving iron core, use the thrust of the inward movement of the manual part to lift the moving iron core, the angle of the conical surface is fixed, so the thrust applied by the manual part to the moving iron core during the valve opening process is stable, and it is also beneficial for the designer to design the bevel angle to a more labor-saving angle, so that the thrust applied by the operator to the manual part when opening the valve is close to the force required to open the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a solenoid valve according to an embodiment of the present invention; Figure 2 is a cross-sectional view of a solenoid valve in a closed state according to an embodiment of the present invention; Figure 3 for Figure 2 A partial enlarged view of the circle; Figure 4 It is a cross-sectional view of the solenoid valve of the embodiment of the present invention in the open state; wherein the hollow arrow indicates the flow direction of the medium in the valve body; Figure 5 It is a structural schematic diagram of a mounting base according to an embodiment of the present invention; Figure 6 It is a structural schematic diagram of the mounting base from another perspective of an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below with reference to the accompanying drawings.

[0018] like Figures 1 to 6 The solenoid valve of this embodiment is mainly used to manually open and close the pipeline when the solenoid valve loses power. When the medium pressure in the valve body is relatively high, the rotation force required by the conventional eccentric torsion bar during the valve opening process is unstable and the instantaneous effort required to open the valve is much greater than the valve opening force. It is difficult for the operator to open the valve manually. Therefore, it is beneficial to provide a solenoid valve that is more labor-saving to open the valve manually. The detailed structure of the solenoid valve will be described below: See also Figure 1 , Figure 2 and Figure 5 The solenoid valve includes a valve body 1, a mounting seat 2 arranged on the valve body 1, a moving iron core 3 and a manual part 4 for manual operation, wherein the valve body 1 has a valve port 11 for medium circulation, the mounting seat 2 has a lifting channel 21 running through from top to bottom, the moving iron core 3 can be lifted and lowered in the lifting channel 21 for opening and closing the valve port 11; the mounting seat 2 is also provided with a mounting hole 22 which is perpendicular to the lifting channel 21 and connected to the lifting channel 21, the manual part 4 at least partially penetrates the mounting hole 22 and moves axially along the mounting hole 22, the manual part 4 and the moving iron core 3 are matched with each other by a conical transmission, and the moving iron core 3 performs lifting and lowering motion in the lifting channel 21 based on the drive of the manual part 4.

[0019] See also Figure 3 , a first conical surface 41 is formed at the inner end of the manual member 4, and the side wall of the moving iron core 3 facing the first conical surface 41 is partially recessed inward to form a second conical surface 31 corresponding to the first conical surface 41. The second conical surface 31 recessed inward allows the manual member 4 to maintain a certain distance from the moving iron core 3 when it does not extend into the lifting channel 21, so as to avoid interference between the moving iron core 3 and the manual member 4 when the coil is energized; the matching relationship between the first conical surface 41 and the second conical surface 31 allows the moving iron core 3 to rise or fall along the first conical surface 41, with a simple structure and labor-saving, which is convenient for users to drive the moving iron core 3. The first oblique angle α of the first conical surface 41 relative to the axis of the manual member 4 is in the range of 50 degrees to 56 degrees, and the second oblique angle β of the second conical surface 31 relative to the axis of the moving iron core 3 is in the range of 51 degrees to 57 degrees. In this embodiment, the first oblique angle α is preferably 53 degrees, and the second oblique angle β is preferably 54 degrees.

[0020] When the valve body 1 is used to transport high-temperature media, the operator may be easily burned if he directly operates the manual knob 6. Figure 4 In this embodiment, the manual member 4 is provided with a manual knob 6 exposed to the mounting hole 22 at its outer end, and a connecting portion 61 for connecting an external tool is provided on the manual knob 6. The operator can operate the manual member 4 by connecting the external tool to the connecting portion 61, thereby avoiding being scalded by the high-temperature medium in the valve body 1 when manually operating the manual knob 6, and improving the safety of the solenoid valve when in use; wherein, the connecting portion 61 is a restraining groove provided on the outer end surface of the manual knob 6, and the external tool is at least partially restrained in the circumferential direction and placed in the restraining groove, thereby enhancing the stability of the connection between the connecting portion 61 and the external tool.

[0021] See also Figures 4 to 6The manual member 4 can be rotatably arranged in the mounting hole 22. The mounting seat 2 is formed with a cylinder 23 extending radially outward along the moving iron core 3 at the periphery of the mounting hole 22. The cylinder 23 is provided with a limit sliding hole 231 extending spirally along the axial direction of the cylinder 23. The manual member 4 is provided with a limit pin 42 inserted into the limit sliding hole 231. The manual member 4 can move spirally inward along the limit sliding hole 231. The inward support force of the limit sliding hole 231 on the limit pin 42 can reduce the thrust required for the manual member 4 to move inward. It is more labor-saving for the user to push the manual member 4 inward. In addition, the limit pin 42 inserted into the limit sliding hole 231 can display the moving position of the manual member 4, which is convenient for the user to judge the pushing depth of the manual member 4.

[0022] The end of the limiting sliding hole 231 is extended with a limiting portion 232 perpendicular to the axis of the cylinder 23. When the operator slides the limiting pin 42 to the end of the limiting sliding hole 231, the limiting pin 42 can be further slid into the limiting portion 232 for axial limiting, so as to prevent the manual member 4 from accidentally separating from the moving iron core 3 after the valve port 11 is opened, causing the valve port 11 to be closed, thereby stabilizing the valve opening state of the solenoid valve; wherein, the helical lead angle γ of the limiting sliding hole 231 is 20 degrees.

[0023] Finally, an elastic member 5 is provided between the manual member 4 and the cylinder 23 . The elastic member 5 has a tendency to press the manual member 4 axially outwardly along the mounting hole 22 , so as to facilitate the manual member 4 to be reset.

[0024] The action processes of opening and closing the solenoid valve of this embodiment are respectively: 1) Opening the valve: When the coil is de-energized and the seal at the lower end of the moving iron core 3 blocks the valve port 1, the operator rotates the manual knob 6 clockwise into the mounting hole 22, the elastic member 5 is axially compressed, the limit pin 42 slides from the outer end of the limit sliding hole 231 to the limit portion 232, the limit pin 42 is axially limited at the limit portion 232, the first cone surface 41 at the inner end of the manual member 4 is in transmission cooperation with the second cone surface 31 of the moving iron core 3, the moving iron core 3 rises to open the valve port 11, and the medium flows; The transmission matching process is as follows: the first conical surface 41 first contacts the upper edge of the second conical surface 31, and the moving iron core 3 rises along the first conical surface 41. When the manual member 4 moves inwardly until the outer peripheral edge of the first conical surface 41 contacts the upper edge of the second conical surface 31 and continues to move inwardly, the outer peripheral edge of the first conical surface 41 begins to contact the second conical surface 31, and then the moving iron core 3 continues to rise along the second conical surface 31 until the limit pin 42 slides into the limit portion 232; in this process, the first bevel angle α of the first conical surface 41 is 53 degrees, and the second bevel angle β of the second conical surface is 54 degrees, so that the inward thrust applied by the operator to the manual member 4 is equivalent to the valve opening force required by the moving iron core 3, and the rotational force is equivalent to the rolling friction between the two conical surfaces, which overcomes the problem that the rotational force applied by the existing manual solenoid valve during the valve opening process is unstable and laborious; 2) Valve closing: The operator rotates the manual knob 6 counterclockwise to slide the limit pin 42 from the limit portion 232 to the outer end of the limit slide hole 231, the elastic member 5 extends axially, the first cone surface 41 separates from the second cone surface 31, the manual member 4 resets, the moving iron core 3 descends, the valve port 11 is closed, and the medium is cut off.

[0025] The solenoid valve in the present invention is used to drive the manual part 4 of the moving iron core 3 and the conical transmission cooperation between the moving iron core 3. The moving iron core 3 is lifted up by the thrust of the inward movement of the manual part 4. The angle of the conical surface is fixed. Therefore, the thrust applied by the manual part 4 to the moving iron core 3 during the valve opening process is stable. At the same time, it is also beneficial for the designer to design the bevel angle to a more labor-saving angle, so that the thrust applied by the operator to the manual part 4 when opening the valve is close to the force required to open the valve.

Claims

1. A solenoid valve, comprising: A valve body (1) having a valve port (11) for medium circulation; A mounting seat (2) is arranged on the valve body (1) and has a lifting passage (21) extending vertically; A moving iron core (3) is arranged in the lifting channel (21) in a liftable manner and is used to open and close the valve port (11); Features: Also includes A manual part (4), used for manual operation; The mounting seat (2) is also provided with a mounting hole (22) which is perpendicular to the lifting channel (21) and communicates with the lifting channel (21); the manual member (4) at least partially penetrates the mounting hole (22) and moves axially along the mounting hole (22); the manual member (4) and the moving iron core (3) are matched in a conical transmission manner; the moving iron core (3) performs a lifting movement in the lifting channel (21) based on the drive of the manual member (4).

2. The solenoid valve according to claim 1, characterized in that: The inner end of the manual member (4) is formed with a first conical surface (41), and the side wall of the moving iron core (3) facing the first conical surface (41) is partially recessed inward to form a second conical surface (31) corresponding to the first conical surface (41).

3. The solenoid valve according to claim 2, characterized in that: The first oblique angle (α) of the first conical surface (41) relative to the axis of the manual member (4) is in the range of 50 to 56 degrees, and the second oblique angle (β) of the second conical surface (31) relative to the axis of the moving iron core (3) is in the range of 51 to 57 degrees.

4. The solenoid valve according to claim 1, characterized in that: The outer end of the manual member (4) is provided with a manual knob (6) exposed from the mounting hole (22), and the manual knob (6) is provided with a connecting portion (61) for connecting an external tool.

5. The solenoid valve according to claim 4, characterized in that: The connecting portion (61) is a restraining groove provided on the outer end surface of the manual knob (6), and the external tool is at least partially restrained in the circumferential direction and is placed in the restraining groove.

6. The solenoid valve according to any one of claims 1 to 5, characterized in that: The manual member (4) is rotatably arranged in the mounting hole (22); The mounting seat (2) is provided with a cylinder (23) extending radially outwardly from the moving iron core (3) at the periphery of the mounting hole (22); a limiting sliding hole (231) extending spirally along the axial direction of the cylinder (23) is provided on the cylinder (23); and a limiting pin (42) inserted into the limiting sliding hole (231) is provided on the manual member (4).

7. The solenoid valve according to claim 6, characterized in that: A limiting portion (232) perpendicular to the axis of the cylinder (23) is extended from the end of the limiting sliding hole (231).

8. The solenoid valve according to claim 6, characterized in that: The helix angle γ of the limiting sliding hole (231) is 20 degrees.

9. The solenoid valve according to claim 6, characterized in that: An elastic member (5) is provided between the manual member (4) and the cylinder (23), and the elastic member (5) has a tendency to press the manual member (4) axially outward along the mounting hole (22).

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