Two-position three-way electromagnetic valve

Abstract

The two-position three-way electromagnetic valve comprises a coil assembly, a valve element, a valve seat and a fixing piece, the valve element is installed on the valve seat, the valve element seals the interior of the valve seat to form a cavity, the valve seat comprises a first valve port and a second valve port, the first valve port and the second valve port are both communicated with the cavity, a part of the valve element is located outside the valve seat, and the coil assembly is arranged on the periphery of the valve element in a sleeved mode. The valve element is located in a center channel of the coil assembly, the fixing piece and the valve element are fixedly installed, the valve element comprises a static iron core and a movable iron core, a part of the movable iron core is located in the cavity, the static iron core comprises a third channel, the fixing piece comprises a third valve port, the third valve port is communicated with the third channel, and the movable iron core has a first state and a second state. In the first state, the movable iron core blocks the second valve port to enable the first valve port to be communicated with the third valve port, in the second state, the movable iron core blocks the third valve port to enable the first valve port to be communicated with the second valve port, communication of the valve ports is switched through direct movement of the movable iron core, the internal structure of the valve seat is simpler, and the size of the electromagnetic valve is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to a two-position three-way electromagnetic valve. Background Art

[0002] A two-position three-way solenoid valve can provide control gas for a gas-actuated valve and provide an exhaust channel for the control gas. A traditional two-position three-way solenoid valve generally includes two upper and lower valves, which are linked to the iron core through a push rod, and the sealing part of the valve is integrated on the valve seat, which makes the valve seat difficult to process and has a complex internal structure. Since the three-way valve ports are all located on the valve seat, the height of the valve seat is relatively high, resulting in a large volume of the entire solenoid valve, which is not suitable for use in some environments with smaller spaces. 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 two-position three-way solenoid valve in response to the above technical requirements.

[0004] The utility model provides a two-position three-way solenoid valve, including a coil assembly, a valve core, a valve seat and a fixing part, the valve core is installed on the valve seat, the valve core closes the valve seat and a cavity is formed inside the valve seat, the valve seat includes valve port one and valve port two, the valve port one and valve port two are both connected to the cavity, a part of the valve core is located outside the valve seat, the coil assembly is sleeved on the outer periphery of the valve core, the valve core is located in the central channel of the coil assembly, the fixing part is fixedly installed with the valve core, the valve core includes a static iron core and a moving iron core, a part of the moving iron core is located in the cavity, the static iron core includes channel three, the fixing part includes valve port three, the valve port three is connected to channel three, the moving iron core includes a first state and a second state, in the first state, the moving iron core blocks valve port two so that valve port one is connected to valve port three, and in the second state, the moving iron core blocks valve port three so that valve port one is connected to valve port two.

[0005] Furthermore, the valve core includes a shell, the static iron core and the moving iron core are installed in the shell, the shell is provided with a ring portion, the valve seat has an installation groove, the ring portion is connected to the installation groove by a thread, the ring portion is installed with a sealing ring, and the sealing ring seals the contact surface between the ring portion and the installation groove.

[0006] Furthermore, the valve seat includes channel one and channel two, channel one connects valve port one and the cavity, channel two connects valve port two and the cavity, channel two is located at the center of the bottom of the cavity, and the moving iron core blocks channel two in the first state.

[0007] Furthermore, the valve seat includes a protrusion, the protrusion is located at the center of the bottom of the cavity, the second channel runs through the protrusion, and the protrusion is in a cone shape with a diameter gradually decreasing upwards.

[0008] Furthermore, a portion of the fixing member is located in the central channel, the fixing member covers a portion of the valve core, and the valve core is provided with a second sealing ring, and the second sealing ring seals the contact surface between the fixing member and the valve core.

[0009] Furthermore, a convex edge is provided on the outer wall of the fixing member, the convex edge presses the coil assembly, the coil assembly presses the valve seat, and the fixing member, the coil assembly and the valve seat are fixedly installed.

[0010] Furthermore, the valve core includes a spring, the moving iron core is provided with a flange, the flange is located on a side wall of one end of the moving iron core in the cavity, and two ends of the spring press against the housing and the flange respectively.

[0011] Furthermore, the spring is conical, the large diameter end of the spring presses against the housing, and the small diameter end of the spring presses against the flange.

[0012] Furthermore, the moving iron core is provided with a through slot, the through slot is located on the side wall of the moving iron core, the through slot connects the upper and lower end surfaces of the moving iron core, and in the first state, the through slot connects the cavity and channel three.

[0013] Compared with the related art, the two-position three-way solenoid valve provided by the utility model has the following beneficial effects:

[0014] The utility model has two valve ports in the valve seat and a valve port is arranged on the valve core. The movement of the moving iron core in the valve core is achieved by energizing and de-energizing the coil. The two ends of the moving iron core can press and close the second channel and the third channel. The direct movement of the moving iron core enables the valve port one to switch and connect the valve port two and the valve port three, so that the valve seat structure is simpler and the processing difficulty is reduced. The volume of the solenoid valve is reduced, and it is more suitable for installation in an environment with limited space. 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 cross-sectional view of the first state of this embodiment.

[0018] Figure 4 It is a cross-sectional view of the second state of this embodiment.

[0019] Numbers in the figure: 1. Coil assembly; 11. Center channel; 2. Valve seat; 21. Valve port one; 211. Channel one; 22. Valve port two; 221. Channel two; 23. Mounting groove; 24. Cavity; 25. Bump; 3. Valve core; 31. Shell; 311. Ring; 312. Sealing ring one; 32. Static iron core; 321. Channel three; 322. Sealing ring two; 33. Moving iron core; 331. Flange; 332. Through groove; 4. Fixing piece; 41. Valve port three; 42. Raised edge; 5. Gasket; 6. Spring. 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 , Figure 3 As shown, this embodiment discloses a two-position three-way solenoid valve, including a coil assembly 1, a valve core 3, a valve seat 2 and a fixing member 4. The valve core 3 is installed on the valve seat 2. The valve core 3 includes a shell 31. The shell 31 is provided with a ring portion 311. The valve seat 2 is provided with a mounting groove 23. The ring portion 311 is connected to the mounting groove 23 by threads. A sealing ring 312 is installed on the ring portion 311. The sealing ring 312 seals the contact surface between the ring portion 311 and the mounting groove 23. The valve core 3 closes the valve seat 2 and a cavity 24 is formed inside the valve seat 2. The sealing ring 312 can block the gas in the cavity 24 from flowing out from the contact surface between the ring portion 311 and the mounting groove 23. The upper end surface of the ring portion 311 does not exceed the upper end surface of the valve seat 2, so that the ring portion 311 can be completely sunk into the mounting groove 23, thereby reducing the overall height of the valve core 3 and the valve seat 2 after installation.

[0022] like Figure 2 , Figure 3 As shown, the coil assembly 1 is sleeved on the outer periphery of the valve core 3, the valve core 3 is located in the central channel 11 of the coil assembly 1, the fixing member 4 is fixedly installed with the valve core 3, the outer wall of the fixing member 4 is provided with a convex edge 42, the convex edge 42 presses the coil assembly 1, the coil assembly 1 presses the valve seat 2, the fixing member 4, the coil assembly 1, and the valve seat 2 are fixedly installed, the coil assembly 1 is sleeved on the outside of the valve core 3, a part of the fixing member 4 is located in the central channel 11, the fixing member 4 covers a part of the valve core 3, the valve core 3 is provided with a sealing ring 2 322, the sealing ring 2 322 seals the contact surface between the fixing member 4 and the valve core 3 to prevent the gas in the central channel 11 from directly flowing out from the contact surface between the fixing member 4 and the valve core 3, by installing the fixing member 4 at the end of the valve core 3 away from the valve seat 2, a part of the fixing member 4 extends into the central channel 11, the valve core 3 is connected by threads, and a gasket 5 is installed on the top of the coil assembly 1 to play a role of pressing and sealing, thereby increasing the area where the convex edge 42 presses on the coil assembly 1, and protecting the shell of the coil assembly 1 from being damaged by excessive pressure.

[0023] like Figure 3 , Figure 4 As shown, the valve core 3 includes a static iron core 32, a moving iron core 33, and a spring 6. The static iron core 32 and the moving iron core 33 are installed on the housing 31. Both ends of the moving iron core 33 are installed with rubber blocks useful for pressing and sealing. A part of the moving iron core 33 is located in the cavity 24. The static iron core 32 includes a channel three 321. The fixing member 4 includes a valve port three 41. The valve port three 41 is connected to the channel three 321. The moving iron core 33 is provided with a flange 331. The flange 331 is located on the side wall of one end of the moving iron core 33 in the cavity 24. The two ends of the spring 6 press the housing 31 and the flange 331 respectively. The spring 6 can press the moving iron core 33 away from the static iron core 32. The valve seat 2 includes a valve port one 21 and a valve port two 22. The valve port one 21 and the valve port two 22 are both connected to the cavity 24. A part of the valve core 3 is located outside the valve seat 2. The moving iron core 33 includes a first state and a second state. In the first state, the moving iron core 33 is in a state of being ... In one state, the coil assembly 1 is in an unpowered state, and the spring 6 presses the moving iron core 33 close to the valve seat 2, so that the lower end of the moving iron core 33 blocks the valve port 22, and the upper end of the moving iron core 33 leaves the channel 321, so that the valve port 1 21 is connected to the valve port 3 41. In the second state, the coil assembly 1 is in an energized state, the static iron core 32 absorbs the moving iron core 33, and the moving iron core 33 overcomes the force of the spring 6 and moves away from the valve seat 2, so that the upper end of the moving iron core 33 blocks the channel 321, and the valve port 2 22 is opened. The upper end of the moving iron core 33 blocks the valve port 3 41, so that the valve port 1 21 is connected to the valve port 2 22, and the direct movement of the moving iron core 33 enables the valve port 1 21 to switch and connect the valve port 2 22 and the valve port 3 41. The internal structure of such a valve seat 2 is simpler, the processing difficulty is reduced, the volume of the entire solenoid valve is reduced, and it is more suitable for installation in an environment with limited space.

[0024] More preferably, the valve seat 2 includes channel one 211, channel two 221, and a protrusion 25. The protrusion 25 is located at the bottom center of the cavity 24. Channel two 221 runs through the protrusion 25. The protrusion 25 is in the shape of a cone with a diameter gradually decreasing upward. The conical protrusion 25 can reduce the force area of ​​the moving iron core 33 pressing and blocking the channel two 221, increase the pressure, and make the pressing and blocking of the moving iron core 33 more stable. Channel one 211 connects the valve port one 21 and the cavity 24, channel two 221 connects the valve port two 22 and the cavity 24, channel two 221 is located at the center of the bottom of the cavity 24, channel two 221 and channel three 321 as well as the moving iron core 33 are concentrically arranged, and in the first state, the spring 6 presses the moving iron core 33 so that the moving iron core 33 presses the protrusion 25 to block the channel two 221.

[0025] like Figure 2 , Figure 3As shown, more preferably, the spring 6 is conical, with the large diameter end of the spring 6 pressing against the housing 31, and the small diameter end of the spring 6 pressing against the flange 331. The conical spring 6 can better support and clamp the flange 331, so that the moving iron core 33 can always remain in the center position when moving, and the conical spring 6 is not easy to deform.

[0026] like Figure 2 , Figure 3 As shown, the moving iron core 33 is provided with a through groove 332, and the through groove 332 is located on the side wall of the moving iron core 33. The through groove 332 connects the upper and lower end surfaces of the moving iron core 33. In the first state, the through groove 332 connects the cavity 24 and the channel three 321. In the first state, the gas flowing into the cavity 24 from the valve port 1 21 can flow to the channel three 321 through the through groove 332 and then flow to the valve port three 41. The through groove 332 can not only provide gas circulation but also reduce the weight of the moving iron core 33, thereby reducing the voltage required when the coil assembly 1 is energized.

[0027] 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 two-position three-way solenoid valve, Features: The invention comprises a coil assembly (1), a valve core (3), a valve seat (2) and a fixing member (4), wherein the valve core (3) is installed on the valve seat (2), the valve core (3) closes the valve seat (2) and a cavity (24) is formed inside the valve seat (2), the valve seat (2) comprises a valve port 1 (21) and a valve port 2 (22), the valve port 1 (21) and the valve port 2 (22) are both connected to the cavity (24), a part of the valve core (3) is located outside the valve seat (2), the coil assembly (1) is sleeved on the outer periphery of the valve core (3), the valve core (3) is located in the central channel (11) of the coil assembly (1), and the fixing member (4) is fixedly installed with the valve core (3). The valve core (3) comprises a static iron core (32) and a dynamic iron core (33), a part of the dynamic iron core (33) is located in the cavity (24), the static iron core (32) comprises a channel three (321), the fixing member (4) comprises a valve port three (41), the valve port three (41) is connected to the channel three (321), the dynamic iron core (33) comprises a first state and a second state, in the first state the dynamic iron core (33) blocks the valve port two (22) so that the valve port one (21) is connected to the valve port three (41), in the second state the dynamic iron core (33) blocks the valve port three (41) so that the valve port one (21) is connected to the valve port two (22).

2. A two-position three-way solenoid valve according to claim 1, Features: The valve core (3) comprises a housing (31), the static iron core (32) and the movable iron core (33) are mounted on the housing (31), the housing (31) is provided with a ring portion (311), the valve seat (2) is provided with a mounting groove (23), the ring portion (311) is connected to the mounting groove (23) by means of threads, the ring portion (311) is provided with a sealing ring 1 (312), and the sealing ring 1 (312) seals the contact surface between the ring portion (311) and the mounting groove (23).

3. A two-position three-way solenoid valve according to claim 1, Features: The valve seat (2) comprises a channel 1 (211) and a channel 2 (221); the channel 1 (211) is connected to the valve port 1 (21) and the cavity (24); the channel 2 (221) is connected to the valve port 2 (22) and the cavity (24); the channel 2 (221) is located at the center of the bottom of the cavity (24); and in the first state, the moving iron core (33) blocks the channel 2 (221).

4. A two-position three-way solenoid valve according to claim 3, Features: The valve seat (2) comprises a protrusion (25), the protrusion (25) is located at the center of the bottom of the cavity (24), the second channel (221) passes through the protrusion (25), and the protrusion (25) is in a conical shape with a diameter gradually decreasing upwards.

5. A two-position three-way solenoid valve according to claim 1, Features: A portion of the fixing member (4) is located in the central channel (11), and the fixing member (4) covers a portion of the valve core (3). The valve core (3) is provided with a second sealing ring (322), and the second sealing ring (322) seals the contact surface between the fixing member (4) and the valve core (3).

6. A two-position three-way solenoid valve according to claim 1, Features: The outer wall of the fixing member (4) is provided with a convex edge (42), the convex edge (42) presses against the coil assembly (1), the coil assembly (1) presses against the valve seat (2), and the fixing member (4), the coil assembly (1) and the valve seat (2) are fixedly installed.

7. A two-position three-way solenoid valve according to claim 1, Features: The valve core (3) comprises a spring (6), the movable iron core (33) is provided with a flange (331), the flange (331) is located on a side wall of one end of the movable iron core (33) in the cavity (24), and the two ends of the spring (6) respectively press against the housing (31) and the flange (331).

8. A two-position three-way solenoid valve according to claim 7, Features: The spring (6) is conical, the large diameter end of the spring (6) presses against the housing (31), and the small diameter end of the spring (6) presses against the flange (331).

9. A two-position three-way solenoid valve according to claim 1, Features: The moving iron core (33) is provided with a through slot (332), the through slot (332) is located on the side wall of the moving iron core (33), the through slot (332) is connected to the upper and lower end surfaces of the moving iron core (33), and in the first state, the through slot (332) is connected to the cavity (24) and the channel three (321).

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