Valve core of electromagnetic valve
By installing static plugs, pistons and springs in the moving iron core of the solenoid valve core, the static iron core channel is stable and blocked, solving the problems of unstable and easy damage of the adsorption of the moving iron core, and extending the life of the valve core.
Patent Information
- Application Number
- CN202420071006.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-11
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-01-11
AI Technical Summary
After the coil of the existing solenoid valve core is turned on, the moving iron core is instantly adsorbed, causing impact and rebound, resulting in unstable adsorption and easy damage, which shortens the valve core life.
A solenoid valve core is designed, and a static plug, piston and spring are installed in the dynamic iron core. The piston stabilizes the passage of the static iron core through the buffering effect of the spring. When the static iron core is close to the static iron core, the piston passes through the spring. The pressure acts to block the channel to ensure stable sealing of the channel.
Through the buffering effect of the spring, the stable adsorption and sealing of the static iron core by the dynamic iron core is achieved, which avoids impact and rebound, and extends the service life of the valve core.
Smart Images
Figure CN222209175U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electromagnetic valves, in particular to a valve core of an electromagnetic valve. Background Art
[0002] In the prior art, the valve core of the solenoid valve usually includes a static iron core and a moving iron core. When the coil outside the valve core is energized, the static iron core will generate an adsorption force on the moving iron core to make the moving iron core approach the static iron core until the moving iron core contacts the static iron core. The moving iron core will block the channel of the static iron core to prevent the medium from flowing out of the channel of the static iron core. However, after the coil is energized, the instantaneous adsorption force of the static iron core on the moving iron core is very large, resulting in the moving iron core being adsorbed and impacting the static iron core. The rebound force generated by the collision of the moving iron core with the static iron core causes the moving iron core to fail to be adsorbed in time, and the adsorption of the moving iron core is unstable. At the same time, each time the moving iron core is adsorbed and hits the static iron core, it is easy to damage the static iron core and the moving iron core, resulting in a short life of the valve core. Therefore, a technical solution is needed to solve the above problems. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a solenoid valve core in response to the above technical requirements.
[0004] The utility model provides a solenoid valve core, including a shell, a static iron core, and a moving iron core. The static iron core is installed at one end of the shell, and a part of the static iron core is located in the shell. The static iron core includes a channel and a convex ring, and the channel connects the inner end and the outer end of the static iron core. The convex ring is located at the inner end of the channel, and a part of the moving iron core is located in the shell. The moving iron core can approach or move away from the static iron core. A static plug, a piston and two springs are installed in the moving iron core, and the two ends of the two springs press the static plug and the piston respectively. The static plug is fixedly installed at the outer end of the moving iron core, and the piston is located in the moving iron core at one end close to the static iron core. The piston can approach or move away from the static iron core, and the moving iron core approaches the static iron core so that the piston presses the convex ring and thus blocks the channel.
[0005] Furthermore, it includes a spring 1, the shell includes a ring portion, the ring portion is located at one end of the shell away from the static iron core, the ring portion is provided with a ring groove, the ring groove is located at one end surface of the ring portion away from the static iron core, the moving iron core includes a flange, the flange is located at the outer end side wall of the moving iron core, and the two ends of the spring 1 respectively press against the ring groove and the flange.
[0006] Furthermore, the spring 1 is conical, and comprises a large diameter end and a small diameter end, the large diameter end is located in the annular groove, and the small diameter end presses against the flange.
[0007] Furthermore, a plurality of through slots are provided on the side wall of the moving iron core, and the plurality of through slots are distributed in a ring shape, and the through slots connect the upper end surface and the lower end surface of the moving iron core.
[0008] Furthermore, the moving iron core includes a through hole, and the through hole connects the inner wall and the outer wall of the moving iron core.
[0009] Furthermore, the moving iron core includes a gasket 1 and a gasket 2, wherein the gasket 1 is located between the spring 2 and the static plug, and the gasket 2 is located between the spring 2 and the piston.
[0010] Furthermore, a shoulder is provided on the inner wall of the moving iron core, and the shoulder reduces the diameter of a part of the moving iron core toward the static iron core to form a closing portion, and the piston includes a small diameter portion, and the small diameter portion can extend into the closing portion.
[0011] Furthermore, the piston includes a sleeve, the sleeve covers the outer side wall of the piston, the piston is made of rubber material, and the sleeve is made of metal material.
[0012] Furthermore, a clamping ring is provided on the inner wall of the moving iron core, and a clamping groove corresponding to the clamping ring is provided on the side wall of the static plug. The static plug is fixedly installed in the moving iron core through the cooperation of the clamping ring and the clamping groove.
[0013] Compared with the related art, the solenoid valve core provided by the utility model has the following beneficial effects:
[0014] A static plug, a second spring and a piston are installed in the moving iron core of the utility model. The static plug is fixed in the moving iron core through elastic deformation. The second spring presses the moving iron core toward the static iron core, so that the piston can press the convex ring of the static iron core to block the channel. When the moving iron core is adsorbed by the static iron core, the spring supporting the piston can play a buffering role, so that the piston can always stably block the channel. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a schematic diagram of this embodiment.
[0016] Figure 2 This is an exploded view of this embodiment.
[0017] Figure 3 It is a schematic diagram of the movable iron core of this embodiment when it is not adsorbed.
[0018] Figure 4 It is a schematic diagram of the moving iron core of this embodiment when being adsorbed.
[0019] Numbers in the figure: 1, housing; 11, ring; 111, ring groove; 2, static iron core; 21, convex ring; 22, convex edge; 23, channel; 3, moving iron core; 31, through groove; 32, flange; 33, through hole; 331, shoulder; 332, closing part; 34, retaining ring; 4, spring one; 5, static plug; 51, retaining groove; 6, piston; 61, sleeve; 611, small diameter part; 7, spring two; 71, gasket one; 72, gasket two. DETAILED DESCRIPTION
[0020] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings show typical embodiments of the present invention.
[0021] like Figure 1 , Figure 2 The present embodiment discloses a solenoid valve core, comprising a shell 1, a static iron core 2, a moving iron core 3, and a spring 4. The static iron core 2 is installed at one end of the shell 1, and a part of the static iron core 2 is located in the shell 1. The outer wall of the static iron core 2 is provided with a convex edge 22, and the convex edge 22 presses against the upper end surface of the shell 1. The convex edge 22 limits the length of the part of the static iron core 2 installed in the shell 1. The static iron core 2 comprises a channel 23 and a convex ring 21. The channel 23 connects the inner end and the outer end of the static iron core 2. The channel 23 can connect the inside of the shell 1 and the outer end of the static iron core 2, and can discharge the medium in the shell 1 outward through the channel 23. The convex ring 21 is located at the inner end of the channel 23. The convex ring 21 is located on the end surface of the static iron core 2 located in the shell 1, and the convex ring 21 protrudes toward the moving iron core 3. The convex ring 21 can reduce the area of the moving iron core 3 blocking the channel 23, so that the force area of the moving iron core 3 pressing against the convex ring 21 is reduced and the pressure is greater, and the moving iron core 3 blocks the channel 23 more stably.
[0022] like Figure 3 , Figure 4 As shown, the shell 1 includes a ring portion 11, which is located at one end of the shell 1 away from the static iron core 2. The ring portion 11 is provided with a ring groove 111, and the ring groove 111 is located on one side end surface of the ring portion 11 away from the static iron core 2. The moving iron core 3 includes a flange 32, and the flange 32 is located on the outer end side wall of the moving iron core 3. The two ends of the spring 14 respectively press the ring groove 111 and the flange 32. A part of the moving iron core 3 is located in the shell 1, and the moving iron core 3 can approach or move away from the static iron core 2. The moving iron core 3 is moved away from the static iron core 2 by the force of the spring 14. When the coil outside the valve core is energized, the static iron core 2 generates a magnetic force to attract the moving iron core 3. The moving iron core 3 overcomes the force of the spring 14 and moves close to the static iron core 2, and the moving iron core 3 blocks the channel 23.
[0023] More preferably, Figure 1 , Figure 2 , Figure 3 As shown, the spring 14 is conical, and the spring 14 includes a large diameter end and a small diameter end. The large diameter end is located in the annular groove 111, and the small diameter end presses against the flange 32. The conical spring 14 has better stability and is not prone to distortion and deformation, which can make the small diameter end of the spring 14 press against the moving iron core 3 to apply force more stably.
[0024] like Figure 2 , Figure 3As shown, a static plug 5, a piston 6 and a second spring 7 are installed in the moving iron core 3, and the two ends of the second spring 7 press the static plug 5 and the piston 6 respectively. The static plug 5 is fixedly installed at the outer end of the moving iron core 3. A clamping ring 34 is provided on the inner wall of the moving iron core 3, and a clamping groove 51 corresponding to the clamping ring 34 is provided on the side wall of the static plug 5. The static plug 5 is fixedly installed in the moving iron core 3 through the cooperation of the clamping ring 34 and the clamping groove 51. The static plug 5 is made of rubber. After the piston 6 and the second spring 7 are successively placed in the moving iron core 3, the static plug 5 is installed in the moving iron core 3 by pressing, so that the clamping ring 34 on the inner wall of the moving iron core 3 is clamped in the clamping groove 51 of the static plug 5, and the static plug 5 is in a fixed connection state with the moving iron core 3.
[0025] like Figure 3 As shown, a shoulder 331 is provided on the inner wall of the moving iron core 3, and the shoulder 331 reduces the diameter of a part of the inner part of the moving iron core 3 toward the static iron core 2 to form a closing portion 332. The piston 6 includes a small diameter portion 611, and the small diameter portion 611 can extend into the closing portion 332. The closing portion 332 can limit the piston 6 and prevent the piston 6 from leaving the moving iron core 3. The piston 6 is located at one end of the moving iron core 3 close to the static iron core 2, and the piston 6 can approach or move away from the static iron core 2. The piston 6 is pressed toward the small diameter portion 611 by the spring 27. When the moving iron core 3 is adsorbed by the static iron core 2, the piston 6 is acted upon by the spring 27, and the moving iron core 3 approaches the static iron core 2 so that the piston 6 presses the convex ring 21 and thereby blocks the channel 23. The convex ring 21 presses the piston 6 away from the static iron core 2. The piston 6 overcomes the spring 27 and sinks slightly. At the same time, the spring 27 presses the piston 6 and thereby can always press the convex ring 21, so that the piston 6 can more stably block the channel 23.
[0026] like Figure 2 As shown, a plurality of through grooves 31 are provided on the side wall of the moving iron core 3, and the plurality of through grooves 31 are distributed in a ring shape. The through grooves 31 connect the upper end face and the lower end face of the moving iron core 3. When the valve core of this embodiment is installed on the valve body, a valve port will be provided at the lower end of the moving iron core 3. When the moving iron core 3 is located at the lowermost position, the valve port will be blocked, so that the medium can only flow to the channel 23 of the static iron core 2 through the through grooves 31 of the moving iron core 3. At the same time, the through grooves 31 provided on the moving iron core 3 can also reduce the weight of the moving iron core 3. When the moving iron core 3 moves, the air pressure in the upper and lower spaces of the moving iron core 3 can be balanced, so that the moving iron core 3 can be better attracted by the static iron core 2.
[0027] like Figure 3 , Figure 4 As shown, more preferably, the moving iron core 3 includes a through hole 33, and the through hole 33 connects the inner wall and the outer wall of the moving iron core 3. The through hole 33 can balance the air pressure inside and outside the moving iron core 3 when the piston 6 moves.
[0028] like Figure 2 , Figure 3As shown, more preferably, the moving iron core 3 includes a gasket 71 and a gasket 72, the gasket 71 is located between the spring 27 and the static plug 5, and the gasket 72 is located between the spring 27 and the piston 6. The gasket 71 and the gasket 72 can increase the contact area between the spring 27 and the static plug 5 and the piston 6, and can better press the static plug 5 and the piston 6 to prevent the spring 27 from twisting and deforming.
[0029] like Figure 2 , Figure 3 As shown, more preferably, the piston 6 includes a sleeve 61, which covers the outer wall of the piston 6. The piston 6 is made of rubber and the sleeve 61 is made of metal. Since the piston 6 needs to have good mobility, but the friction between the side wall of the rubber piston 6 and the inner wall of the metal moving iron core 3 is very large when it is moving, the outer wall of the piston 6 is covered with a sleeve 61 made of metal to reduce the friction between the side wall of the piston 6 and the inner wall of the moving iron core 3.
[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A solenoid valve core, characterized in that: The invention comprises a housing (1), a static iron core (2), and a moving iron core (3), wherein the static iron core (2) is mounted at one end of the housing (1), a portion of the static iron core (2) is located inside the housing (1), the static iron core (2) comprises a channel (23) and a convex ring (21), the channel (23) connects the inner end and the outer end of the static iron core (2), the convex ring (21) is located at the inner end of the channel (23), a portion of the moving iron core (3) is located inside the housing (1), and the moving iron core (3) can be close to or away from the static iron core (2) A static plug (5), a piston (6) and a second spring (7) are installed in the moving iron core (3). The two ends of the second spring (7) respectively press against the static plug (5) and the piston (6). The static plug (5) is fixedly installed at the outer end of the moving iron core (3). The piston (6) is located at one end of the moving iron core (3) close to the static iron core (2). The piston (6) can approach or move away from the static iron core (2). When the moving iron core (3) approaches the static iron core (2), the piston (6) presses against the convex ring (21) to block the channel (23).
2. The solenoid valve core according to claim 1, characterized in that: The invention comprises a spring (4), the housing (1) comprises a ring portion (11), the ring portion (11) is located at one end of the housing (1) away from the static iron core (2), the ring portion (11) is provided with a ring groove (111), the ring groove (111) is located at one end surface of the ring portion (11) away from the static iron core (2), the movable iron core (3) comprises a flange (32), the flange (32) is located at the outer end side wall of the movable iron core (3), and the two ends of the spring (4) respectively press against the ring groove (111) and the flange (32).
3. The solenoid valve core according to claim 2, characterized in that: The spring one (4) is conical and comprises a large diameter end and a small diameter end. The large diameter end is located in the annular groove (111), and the small diameter end presses against the flange (32).
4. The solenoid valve core according to claim 1, characterized in that: A plurality of through slots (31) are provided on the side wall of the moving iron core (3), the plurality of through slots (31) are distributed in a ring shape, and the through slots (31) are connected to the upper end surface and the lower end surface of the moving iron core (3).
5. The solenoid valve core according to claim 1, characterized in that: The moving iron core (3) comprises a through hole (33), and the through hole (33) connects the inner wall and the outer wall of the moving iron core (3).
6. The solenoid valve core according to claim 1, characterized in that: The moving iron core (3) comprises a gasket 1 (71) and a gasket 2 (72), wherein the gasket 1 (71) is located between the spring 2 (7) and the static plug (5), and the gasket 2 (72) is located between the spring 2 (7) and the piston (6).
7. The solenoid valve core according to claim 1, characterized in that: The inner wall of the moving iron core (3) is provided with a shoulder (331), and the shoulder (331) reduces the diameter of a part of the inside of the moving iron core (3) toward the static iron core (2) to form a closing portion (332). The piston (6) includes a small diameter portion (611), and the small diameter portion (611) can extend into the closing portion (332).
8. The solenoid valve core according to claim 1, characterized in that: The piston (6) comprises a sleeve (61), wherein the sleeve (61) covers the outer wall of the piston (6), the piston (6) is made of rubber material, and the sleeve (61) is made of metal material.
9. The solenoid valve core according to claim 1, characterized in that: The inner wall of the moving iron core (3) is provided with a clamping ring (34), the side wall of the static plug (5) is provided with a clamping groove (51) corresponding to the clamping ring (34), and the static plug (5) is fixedly installed in the moving iron core (3) through the cooperation of the clamping ring (34) and the clamping groove (51).