CN219493217U - Electromagnetic valve - Google Patents

Abstract

The utility model discloses an electromagnetic valve, which comprises a valve body, wherein a valve cavity is defined in the valve body, an inlet and an outlet are formed in the valve body, and the inlet is communicated with the valve cavity; the valve core is movably arranged in the valve cavity and used for controlling the communication or the separation of the outlet and the valve cavity, and the valve core is internally provided with a containing cavity; the magnetic core assembly comprises a static iron core, a movable iron core and a first elastic piece, wherein the static iron core is fixed on the valve body, the movable iron core is movable relative to the valve body, the movement of the valve core is controlled by electromagnetic force between the movable iron core and the static iron core, a supporting portion is arranged at one end, adjacent to the outlet, of the movable iron core, at least part of the supporting portion is located in the accommodating cavity, and the first elastic piece is stopped between the supporting portion and the valve body. According to the electromagnetic valve disclosed by the utility model, the operation of the electromagnetic valve is reliable, the structure of the electromagnetic valve is simple, and the electromagnetic valve is convenient to produce and process.

Description

Electromagnetic valve

Technical Field

The utility model relates to the technical field of fluid control, in particular to an electromagnetic valve.

Background

Solenoid valves are solenoid-operated industrial equipment, which is an automated basic element for controlling fluids, typically for the on-off control of liquid and gas lines. However, the solenoid valve in the related art has poor operation stability, complex structure, and great processing difficulty, thereby resulting in high cost and low production efficiency of the solenoid valve.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model aims to provide the electromagnetic valve which is reliable in operation, simple in structure and convenient to produce and process.

According to an embodiment of the present utility model, a solenoid valve includes: the valve body is internally provided with a valve cavity, an inlet and an outlet are formed in the valve body, and the inlet is communicated with the valve cavity; the valve core is movably arranged in the valve cavity and used for controlling the communication or the separation of the outlet and the valve cavity, and the valve core is internally provided with a containing cavity; the magnetic core assembly comprises a static iron core, a movable iron core and a first elastic piece, wherein the static iron core is fixed on the valve body, the movable iron core is movable relative to the valve body, the movement of the valve core is controlled by electromagnetic force between the movable iron core and the static iron core, a supporting portion is arranged at one end, adjacent to the outlet, of the movable iron core, at least part of the supporting portion is located in the accommodating cavity, and the first elastic piece is stopped between the supporting portion and the valve body.

According to the electromagnetic valve provided by the embodiment of the utility model, the first elastic piece is arranged between the supporting part and the valve body, so that the occupation of the first elastic piece on the movable iron core is reduced, the space of the valve cavity is effectively utilized, the magnetic attraction area between the movable iron core and the static iron core is increased, the movable iron core is facilitated to move towards the static iron core, the matching reliability of the movable iron core and the static iron core is improved, and the operation stability of the electromagnetic valve is further improved. In addition, the supporting part has supporting effect on the first elastic piece, so that the stability of the first elastic piece in long-term use is improved.

According to some embodiments of the utility model, the solenoid valve further comprises: the second elastic piece is arranged between the valve body and the valve core, and the valve core can move towards a direction away from the outlet under the combined action of the magnetic core assembly and the second elastic piece so as to open the outlet to enable the outlet to be communicated with the valve cavity.

According to some embodiments of the utility model, the support comprises: one end of the supporting rod is connected with one end, adjacent to the outlet, of the movable iron core, and the other end of the supporting rod extends towards the direction of the outlet and stretches into the accommodating cavity; the support flange is connected to the outer peripheral surface of the support rod, the support flange is located in the accommodating cavity, and the first elastic piece is stopped between the support flange and the valve body.

According to some embodiments of the utility model, the housing chamber comprises a first housing chamber and a second housing chamber which are communicated with each other, the first housing chamber is connected to one end of the second housing chamber far away from the outlet, a step part is formed between the first housing chamber and the second housing chamber, the support flange is positioned in the first housing chamber, and the support flange is abutted against the step part when the valve core moves towards the direction of the outlet.

According to some embodiments of the utility model, the valve chamber communicates with the receiving chamber when the valve cartridge blocks the outlet such that communication of the outlet with the valve chamber is blocked.

According to some embodiments of the utility model, the valve core is provided with a pressure relief hole, the pressure relief hole is communicated with the outlet, the other end of the supporting rod is detachably matched with the pressure relief hole, the accommodating cavity is communicated with the outlet through the pressure relief hole when the other end of the supporting rod is separated from the pressure relief hole, and the communication between the accommodating cavity and the outlet is blocked when the other end of the supporting rod seals the pressure relief hole.

According to some embodiments of the utility model, the support flange has at least one communication hole formed therethrough.

According to some embodiments of the utility model, the communication holes are a plurality of, and the communication holes are arranged at intervals along the circumferential direction of the support flange.

According to some embodiments of the utility model, the other end of the support bar has a first sealing surface; and one end of the valve core, which is adjacent to the outlet, is provided with a matching part, the pressure relief hole is formed on the matching part, and the matching part is provided with a second sealing surface which is suitable for matching with the first sealing surface.

According to some embodiments of the utility model, the cross-sectional area of the other end of the support rod is gradually reduced in a direction toward the outlet, and an outer peripheral surface of the other end of the support rod is the first sealing surface; the pressure relief hole comprises a first hole section and a second hole section, the second hole section is connected to one end of the first hole section, which is adjacent to the outlet, the cross-sectional area of the first hole section gradually decreases along the direction towards the outlet, and the inner wall surface of the first hole section is the second sealing surface.

According to some embodiments of the utility model, the end surface of the other end of the support rod is the first sealing surface, a side surface of the mating portion facing the first sealing surface is formed as the second sealing surface, and the pressure relief hole penetrates through the second sealing surface.

According to some embodiments of the utility model, the valve body comprises: a valve body, one end of which is far away from the magnetic core assembly is open, and the inlet is formed on the valve body; the valve seat is arranged at one end, far away from the magnetic core assembly, of the valve body, the valve seat and the valve body jointly define the valve cavity, and the valve seat is provided with the outlet.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic illustration of a solenoid valve according to an embodiment of the utility model;

FIG. 2 is an exploded view of a solenoid valve according to an embodiment of the utility model;

FIG. 3 is a schematic view of a plunger of a solenoid valve according to an embodiment of the utility model;

FIG. 4 is a cross-sectional view of a plunger of a solenoid valve according to an embodiment of the utility model;

FIG. 5 is a schematic view of a plunger of a solenoid valve according to another embodiment of the utility model;

FIG. 6 is a cross-sectional view of a plunger of a solenoid valve according to another embodiment of the utility model;

FIG. 7 is a schematic illustration of a spool of a solenoid valve according to an embodiment of the utility model;

FIG. 8 is a cross-sectional view of a spool of a solenoid valve according to an embodiment of the utility model;

FIG. 9 is a schematic illustration of a spool of a solenoid valve according to another embodiment of the utility model;

fig. 10 is a cross-sectional view of a spool of a solenoid valve according to another embodiment of the utility model.

Reference numerals:

100. an electromagnetic valve;

1. a valve body; 11. a valve cavity; 12. an inlet;

13. an outlet; 14. a valve body; 15. a valve seat;

2. a valve core; 21. a receiving chamber;

211. a first accommodation chamber; 212. A second accommodation chamber; 213. A step portion;

22. a pressure relief hole; 221. A first bore section; 222. A second bore section;

23. a mating portion; 231. A second sealing surface;

3. a magnetic core assembly; 31. A stationary core; 32. A movable iron core;

321. a support part; 3211. A support rod;

3212. a support flange; 3213. A communication hole;

3214. a first sealing surface; 322. A ventilation channel; 33. A first elastic member;

4. and a second elastic member.

Detailed Description

Embodiments of the present utility model are described in detail below, with reference to the accompanying drawings, which are exemplary, and solenoid valve 100 according to an embodiment of the present utility model is described below with reference to fig. 1 to 10.

As shown in fig. 1 and 2, a solenoid valve 100 according to an embodiment of the present utility model includes a valve body 1, a valve spool 2, and a core assembly 3.

Specifically, a valve chamber 11 is defined in the valve body 1, and an inlet 12 and an outlet 13 are formed in the valve body 1, the inlet 12 being in communication with the valve chamber 11. When electromagnetically operated, hydraulic oil may flow from the inlet 12 into the valve chamber 11 and from the outlet 13 to the outside of the solenoid valve 100, and the solenoid valve 100 may adjust the flow rate of the hydraulic oil at the outlet 13. In addition, the space inside the valve body 1 can be effectively utilized, so that the solenoid valve 100 can be made smaller. The valve core 2 is movably arranged in the valve cavity 11 and is used for controlling the communication or the separation of the outlet 13 and the valve cavity 11. When the valve core 2 blocks the outlet 13, the valve core 2 blocks the outlet 13 from the valve cavity 11, and the hydraulic oil flowing into the valve cavity 11 from the inlet 12 can be stored in the valve cavity 11 temporarily and cannot flow out from the outlet 13. When the spool 2 moves in the valve chamber 11 to open the outlet port 13, the valve chamber 11 and the outlet port 13 communicate, hydraulic oil in the valve chamber 11 can flow out from the outlet port 13, and hydraulic oil can smoothly flow between the inlet port 12 and the outlet port 13. In addition, when the spool 2 moves within the valve chamber 11, the solenoid valve 100 can adjust the flow rate of hydraulic oil at the outlet port 13 by the position of the spool 2. The valve core 2 has a housing chamber 21 therein. For example, in the examples of fig. 1 and 7, the upper end of the spool 2 is open. Thus, the space inside the valve body 2 can be effectively utilized, so that the solenoid valve 100 can be made more compact, which is advantageous for miniaturization of the solenoid valve 100.

Referring to fig. 1 and 2, the magnetic core assembly 3 includes a stationary core 31, a movable core 32, and a first elastic member 33, the stationary core 31 is fixed to the valve body 1, the movable core 32 is movable relative to the valve body 1 to control movement of the valve core 2 by electromagnetic force with the stationary core 31, one end of the movable core 32 adjacent to the outlet 13 is provided with a supporting portion 321, at least part of the supporting portion 321 is located in the accommodating chamber 21, the first elastic member 33 is stopped between the supporting portion 321 and the valve body 1, and the valve core 2 is movable toward the direction of the outlet 13 under the action of the magnetic core assembly 3 to block the outlet 13. For example, in the example of fig. 1 and 2, the stationary core 31 is connected to the upper end of the valve body 1, the one end of the movable core 32 is referred to as the lower end of the movable core 32, the support portion 321 is connected to the lower end of the movable core 32, the upper end of the first elastic member 33 is stopped by the valve body 1, and the lower end of the first elastic member 33 is stopped by the support portion 321. When the solenoid valve 100 operates, the movable iron core 32 moves away from the stationary iron core 31 under the action of electromagnetic force, and simultaneously, the movable iron core 32 pushes the supporting portion 321 and the valve core 2 to move downward under the action of the first elastic member 33 so as to block the outlet 13. When the valve core 2 blocks the outlet 13, the first elastic member 33 is in a natural extended state. So configured, the supporting portion 321 can support the first elastic member 33, thereby facilitating normal use of the first elastic member 33. In addition, by disposing the first elastic member 33 between the support portion 321 and the valve body 1, the magnetic attraction area between the movable iron core 32 and the stationary iron core 31 is increased as compared with the first elastic member 33 being located on the side of the movable iron core 32 adjacent to the stationary iron core 31, facilitating the movement of the movable iron core 32 toward the stationary iron core 31, thereby improving the reliability of the movement of the movable iron core 32 and improving the operational stability of the electromagnetic valve 100.

According to the electromagnetic valve 100 of the embodiment of the utility model, the first elastic member 33 is arranged between the supporting portion 321 and the valve body 1, so that the occupation of the first elastic member 33 on the movable iron core 32 can be reduced, the space of the valve cavity 11 is effectively utilized, the magnetic attraction area between the movable iron core 32 and the static iron core 31 is increased, the movable iron core 32 is facilitated to move towards the static iron core 31, the matching reliability of the movable iron core 32 and the static iron core 31 is improved, and the operation stability of the electromagnetic valve 100 is further improved. In addition, the supporting portion 321 has a supporting effect on the first elastic member 33, and improves the stability of the first elastic member 33 in long-term use.

With reference to fig. 1 and 2, the solenoid valve 100 further includes a second elastic member 4, where the second elastic member 4 is disposed between the valve body 1 and the valve core 2, and the valve core 2 is movable in a direction away from the outlet 13 by the combined action of the magnetic core assembly 3 and the second elastic member 4 to open the outlet 13 so that the outlet 13 communicates with the valve chamber 11. When the solenoid valve 100 is operated, the movable iron core 32 may move in a direction adjacent to the stationary iron core 31 (i.e., upward movement), while the supporting portion 321 moves upward in synchronization with the movable iron core 32, in which process the supporting portion 321 pushes the first elastic member 33 to move upward, and the first elastic member 33 is compressed. When the force of the movable core 32 and the first elastic member 33 to the valve body 2 is removed, the valve body 2 moves upward to open the outlet 13 by the second elastic member 4, and at this time, the valve chamber 11 and the outlet 13 are communicated, and the hydraulic oil in the valve chamber 11 can flow to the outside of the solenoid valve 100 through the outlet 13. Thereby, the outlet 13 can be opened under the combined action of the magnetic core assembly 3 and the second elastic member 4, which is advantageous for the normal use of the solenoid valve 100.

According to some embodiments of the present utility model, the support portion 321 includes a support rod 3211 and a support flange 3212, one end of the support rod 3211 is connected to the one end of the moving core 32 adjacent to the outlet 13, the other end of the support rod 3211 extends toward the outlet 13 and into the receiving cavity 21, the support flange 3212 is connected to an outer circumferential surface of the support rod 3211, and the support flange 3212 is located in the receiving cavity 21. For example, in the example of fig. 1, the upper end of the support rod 3211 is connected to the lower end of the movable core 32, the support rod 3211 extends in the longitudinal direction of the valve body 1 (for example, in the direction indicated by arrow a in fig. 1) and protrudes into the accommodation chamber 21, and the support flange 3212 is connected to the outer circumferential surface of the support rod 3211. Thus, the space of the housing chamber 21 of the valve body 2 can be effectively utilized, the connection of the components of the solenoid valve 100 is compact, and the solenoid valve 100 can be manufactured more compactly. Moreover, the movable iron core 32 can push the valve core 2 to move downwards through the support rod 3211, which is beneficial to closing the electromagnetic valve 100. In addition, the supporting rods 3211 and the supporting flanges 3212 have simple structures and are convenient to produce, and the production cost of the electromagnetic valve 100 can be reduced.

Referring to fig. 1, the first elastic member 33 is stopped between the support flange 3212 and the valve body 1. That is, at least a portion of the first elastic member 33 is located in the accommodation chamber 21. Therefore, when the first elastic member 33 is in the extended state, the first elastic member 33 can act on the valve core 2 through the supporting portion 321, so that the valve core 2 blocks the outlet 13 (i.e. the electromagnetic valve 100 is in the normally closed state), and the first elastic member 33 is convenient to use, simple to operate, and beneficial to long-term use of the electromagnetic valve 100. In addition, the supporting flange 3212 abuts against the first elastic piece 33, so that the contact area between the supporting flange 3212 and the first elastic piece 33 is increased, the supporting effect of the supporting flange 3212 on the first elastic piece 33 is improved, and the long-term use stability of the first elastic piece 33 is further improved.

Alternatively, the housing chamber 21 includes a first housing chamber 211 and a second housing chamber 212 that are in communication with each other, the first housing chamber 211 is connected to an end of the second housing chamber 212 away from the outlet 13, a stepped portion 213 is formed between the first housing chamber 211 and the second housing chamber 212, a support flange 3212 is located in the first housing chamber 211, and the support flange 3212 abuts against the stepped portion 213 when the spool 2 moves in the direction of the outlet 13. For example, in the examples of fig. 2, 8 and 10, the first accommodation chamber 211 and the second accommodation chamber 212 are sequentially provided from top to bottom along the central axis of the valve core 2, the first accommodation chamber 211 is connected to the upper end of the second accommodation chamber 212, and the support flange 3212 may move up and down in the first accommodation chamber 211 following the movement of the iron core 32. When the spool 2 closes the outlet 13, a portion of the edge of the support flange 3212 may abut against the stepped portion 213. Thus, the step portion 213 may support the support flange 3212, and the step portion 213 and the support flange 3212 may support the first elastic member 33 together, thereby further facilitating long-term use of the first elastic member 33. Moreover, the support flange 3212 and the valve core 2 are assembled more firmly, which is beneficial to long-term use of the support flange 3212.

According to some embodiments of the utility model, the valve chamber 11 communicates with the receiving chamber 21 when the valve cartridge 2 blocks the outlet 13 such that communication of the outlet 13 with the valve chamber 11 is blocked. Therefore, when the valve core 2 seals the outlet 13, the air flow in the valve cavity 11 can flow into the accommodating cavity 21, so that the pressure in the valve cavity 11 and the pressure in the accommodating cavity 21 are balanced, the excessive pressure in the valve cavity 11 can be effectively avoided, and the normal use of the electromagnetic valve 100 is facilitated.

Further, referring to fig. 1 and 2, the valve body 2 is formed with a relief hole 22, the relief hole 22 communicates with the outlet 13, the other end of the support rod 3211 is detachably engaged with the relief hole 22, the accommodating chamber 21 communicates with the outlet 13 through the relief hole 22 when the other end of the support rod 3211 is separated from the relief hole 22, and the communication between the accommodating chamber 21 and the outlet 13 is blocked when the other end of the support rod 3211 blocks the relief hole 22. For example, in the example of fig. 1 and 2, the above-described other end of the support bar 3211 refers to the lower end of the support bar 3211. When the electromagnetic valve 100 works, the electromagnetic valve 100 can be placed in a magnetic field generated by a coil (not shown), after the coil is electrified, under the action of a preset magnetic field, the static iron core 31 generates suction force to the movable iron core 32, the movable iron core 32 can drive the supporting part 321 to move upwards, in the process, the pressure release hole 22 is opened at the other end of the supporting rod 3211, the containing cavity 21 is communicated with the outlet 13 through the pressure release hole 22, and air flow in the containing cavity 21 can flow to the outlet 13 through the pressure release hole 22, so that the pressure in the containing cavity 21 can be reduced, the pressure in the containing cavity 21 and the outlet 13 is balanced, the resistance of upward movement of the valve core 2 is reduced, the upward movement of the valve core 2 in the valve cavity 11 is facilitated, the normal operation of the electromagnetic valve 100 is facilitated, and the operation is smooth.

Further, at least one communication hole 3213 is formed in the support flange 3212. Therefore, the first accommodating cavity 211 and the second accommodating cavity 212 can be communicated through the communication hole 3213, so that the pressure between the first accommodating cavity 211 and the second accommodating cavity 212 is balanced, the problem that the first elastic piece 33 and the supporting part 321 cannot move upwards due to overlarge pressure in the first accommodating cavity 211 is effectively avoided, and the supporting part 321 and the first elastic piece 33 can move smoothly in the accommodating cavity 21, so that the electromagnetic valve 100 is opened and closed more favorably.

Alternatively, the communication holes 3213 are plural, and the plural communication holes 3213 are provided at intervals along the circumferential direction of the support flange 3212. In the description of the present utility model, "plurality" means two or more. For example, in the example of fig. 3 and 5, the communication holes 3213 are six, and the six communication holes 3213 are disposed at intervals around the central axis of the support flange 3212. By this arrangement, the gas flow amount between the first accommodation chamber 211 and the second accommodation chamber 212 is increased, and the pressure between the first accommodation chamber 211 and the second accommodation chamber 212 can be quickly balanced, further improving the movement stability of the support portion 321 and the first elastic member 33.

According to some embodiments of the present utility model, the other end of the support rod 3211 has a first sealing surface 3214, an end of the valve core 2 adjacent to the outlet 13 is provided with a fitting portion 23, the pressure release hole 22 is formed in the fitting portion 23, and the fitting portion 23 has a second sealing surface 231 adapted to be fitted with the first sealing surface 3214. For example, in the examples of fig. 1, 3 and 5, the lower end of the support rod 3211 is formed with a first sealing surface 3214, an engagement portion 23 is formed at the lower side of the valve spool 2, and the pressure release hole 22 extends in the up-down direction. Therefore, through the cooperation of the first sealing surface 3214 and the second sealing surface 231, the cooperation between the support rod 3211 and the pressure relief hole 22 is relatively tight, so that the tightness of the pressure relief hole 22 when the support rod 3211 seals the pressure relief hole 22 is improved, and the probability of hydraulic oil flowing out from the outlet 13 through the pressure relief hole 22 is reduced. In addition, the support rod 3211 also facilitates pushing the spool 2 downward, thereby facilitating closing of the solenoid valve 100.

Optionally, the cross-sectional area of the other end of the support rod 3211 gradually decreases in a direction toward the outlet 13, the outer circumferential surface of the other end of the support rod 3211 is a first sealing surface 3214, the pressure release hole 22 includes a first hole section 221 and a second hole section 222, the second hole section 222 is connected to one end of the first hole section 221 adjacent to the outlet 13, the cross-sectional area of the first hole section 221 gradually decreases in a direction toward the outlet 13, and the inner wall surface of the first hole section 221 is a second sealing surface 231. For example, in the examples of fig. 1, 3 and 8, the cross-sectional area of the lower end of the support rod 3211 gradually decreases from top to bottom, the first hole section 221 is connected above the second hole section 222, and the cross-sectional area of the first hole section 221 gradually increases from bottom to top, and the outer circumferential surface of the lower end of the support rod 3211 abuts against the inner wall surface of the first hole section 221 when the support rod 3211 blocks the pressure release hole 22. By the arrangement, the contact area of the first sealing surface 3214 and the second sealing surface 231 is increased, the cooperation of the first sealing surface 3214 and the second sealing surface 231 is facilitated, the lower end of the supporting rod 3211 is in closer contact with the first hole section 221, the sealing performance of the supporting rod 3211 to the pressure release hole 22 is improved, and the sealing performance of the electromagnetic valve 100 is further improved.

Further alternatively, as shown in fig. 1, 3 and 8, the first sealing surface 3214 and the second sealing surface 231 are each formed as tapered surfaces. That is, the outer circumferential surface of the lower end of the support rod 3211 may be tapered, and the inner circumferential surface of the first hole section 221 may be tapered. Thereby, the cooperation of the first sealing surface 3214 with the second sealing surface 231 is facilitated, and the first hole section 221 may have a guiding effect on the lower end of the supporting rod 3211, thereby facilitating the downward movement of the supporting rod 3211 to block the pressure release hole 22. In addition, the supporting rod 3211 and the pressure release hole 22 have simple structures and are convenient to produce, so that the production efficiency of the electromagnetic valve 100 can be improved. In addition, the assembly of the support rod 3211 and the valve core 2 is facilitated, the assembly operation is simple, thereby improving the assembly efficiency of the electromagnetic valve 100,

according to other embodiments of the present utility model, the end surface of the other end of the support rod 3211 is a first sealing surface 3214, and a side surface of the mating portion 23 facing the first sealing surface 3214 is formed as a second sealing surface 231, and the pressure release hole 22 penetrates the second sealing surface 231. For example, in the example of fig. 5 and 9, the end surface of the lower end of the support rod 3211 is a first sealing surface 3214, the upper surface of the fitting 23 is a second sealing surface 231, and the pressure release hole 22 penetrates the upper and lower surfaces of the fitting 23 to facilitate communication between the receiving chamber 21 and the outlet 13. So set up, the terminal surface of bracing piece 3211 lower extreme can only stop with the upper surface of cooperation portion 23 in order to shutoff relief hole 22 to the contact of bracing piece 3211 lower extreme and relief hole 22 is comparatively inseparable. In addition, the structures of the support rod 3211 and the matching portion 23 are simpler, which is more beneficial to the production and processing of the support rod 3211 and the valve core 2.

Alternatively, referring to fig. 3 and 9, the first sealing surface 3214 and the second sealing surface 231 are each formed as a plane. For example, in the example of fig. 3 and 9, the end face of the lower end of the support rod 3211 is formed flat, and the upper surface of the fitting portion 23 is also formed flat. Thus, the first sealing surface 3214 and the second sealing surface 231 can be in full contact, which is beneficial for the supporting rod 3211 to seal the pressure release hole 22. In addition, the structures of the support rod 3211 and the pressure relief hole 22 are simpler, which is more beneficial to the production and processing of the support rod 3211 and the pressure relief hole 22, further improves the production efficiency of the electromagnetic valve 100 and reduces the production cost of the electromagnetic valve 100.

According to some alternative embodiments of the present utility model, the pressure relief holes 22 are plural, and the plural pressure relief holes 22 are disposed at intervals from each other. For example, in the example of fig. 9, the relief holes 22 are three, and the three relief holes 22 are arranged at intervals around the central axis of the spool 2. Therefore, the contact area between the air flow and the pressure relief hole 22 is increased, so that the air flow flowing from the accommodating cavity 21 to the outlet 13 in unit time is increased, the pressure relief hole 22 can play a role in quick pressure relief, and the valve core 2 can move upwards in the valve cavity 11 more conveniently. It should be noted that the number of the pressure relief holes 22 and the aperture size of each pressure relief hole 22 may be specifically set according to the actual situation, so as to better satisfy the actual application.

Further, referring to fig. 1 and 2, the valve body 1 includes a valve body 14 and a valve seat 15, an end of the valve body 14 remote from the magnetic core assembly 3 is opened, an inlet 12 is formed on the valve body 14, the valve seat 15 is provided at the above end of the valve body 14 remote from the magnetic core assembly 3, the valve seat 15 and the valve body 14 together define a valve cavity 11, and an outlet 13 is formed on the valve seat 15. Therefore, through the split arrangement of the valve body 14 and the valve seat 15, the processing difficulty of the valve body 14 and the valve seat 15 can be reduced, the processing precision of the valve body 14 and the valve seat 15 can be improved, the assembly of the valve body 14 and the valve seat 15 is facilitated, and the assembly operation is simple. In addition, the valve body 14 and the valve seat 15 are simple in structure, and production and processing of the valve body 14 and the valve seat 15 are facilitated.

Alternatively, referring to fig. 3 and 5, at least one ventilation passage 322 is formed on the outer circumferential surface of the movable core 32, the ventilation passage 322 extends in the length direction of the valve body 1, and the ventilation passage 322 penetrates the end surfaces of both ends of the movable core 32. Therefore, the upper part of the movable iron core 32 and the lower part of the movable iron core 32 can be communicated through the ventilation channel 322, the pressure between the upper part of the movable iron core 32 and the lower part of the movable iron core 32 is balanced, and the situation that the movable iron core 32 cannot move upwards due to the fact that the upper pressure of the movable iron core 32 is large can be effectively avoided, so that the movable iron core 32 can smoothly move in the valve cavity 11, the valve core 2 can be moved to an opening position, and the opening of the electromagnetic valve 100 can be facilitated.

Other constructions and operations of the solenoid valve 100 according to embodiments of the utility model are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present utility model, it should be understood that the terms "center," "length," "upper," "lower," "top," "bottom," "inner," "outer," "axial," "circumferential," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (12)

1. A solenoid valve, comprising:

the valve body is internally provided with a valve cavity, an inlet and an outlet are formed in the valve body, and the inlet is communicated with the valve cavity;

the valve core is movably arranged in the valve cavity and used for controlling the communication or the separation of the outlet and the valve cavity, and the valve core is internally provided with a containing cavity;

the magnetic core assembly comprises a static iron core, a movable iron core and a first elastic piece, wherein the static iron core is fixed on the valve body, the movable iron core is movable relative to the valve body, the movement of the valve core is controlled by electromagnetic force between the movable iron core and the static iron core, a supporting portion is arranged at one end, adjacent to the outlet, of the movable iron core, at least part of the supporting portion is located in the accommodating cavity, and the first elastic piece is stopped between the supporting portion and the valve body.

2. The solenoid valve of claim 1, further comprising:

the second elastic piece is arranged between the valve body and the valve core, and the valve core can move towards a direction away from the outlet under the combined action of the magnetic core assembly and the second elastic piece so as to open the outlet to enable the outlet to be communicated with the valve cavity.

3. The electromagnetic valve according to claim 2, wherein the support portion includes:

one end of the supporting rod is connected with one end, adjacent to the outlet, of the movable iron core, and the other end of the supporting rod extends towards the direction of the outlet and stretches into the accommodating cavity;

the support flange is connected to the outer peripheral surface of the support rod, the support flange is located in the accommodating cavity, and the first elastic piece is stopped between the support flange and the valve body.

4. A solenoid valve according to claim 3 wherein said housing chamber includes a first housing chamber and a second housing chamber in communication with each other, said first housing chamber being connected to an end of said second housing chamber remote from said outlet, a stepped portion being formed between said first housing chamber and said second housing chamber, said support flange being located within said first housing chamber, said support flange abutting said stepped portion when said spool is moved in the direction of said outlet.

5. The solenoid valve of claim 1 wherein said valve chamber communicates with said receiving chamber when said valve spool blocks said outlet port such that communication of said outlet port with said valve chamber is blocked.

6. A solenoid valve according to claim 3 wherein said spool has a relief vent formed therein, said relief vent communicating with said outlet, said other end of said support rod detachably engaging said relief vent, said receiving chamber communicating with said outlet through said relief vent when said other end of said support rod is separated from said relief vent, and blocking communication between said receiving chamber and said outlet when said other end of said support rod is blocking said relief vent.

7. The electromagnetic valve according to claim 6, wherein the support flange is formed with at least one communication hole therethrough.

8. The electromagnetic valve according to claim 7, wherein the communication holes are plural, and plural communication holes are provided at intervals along the circumferential direction of the support flange.

9. The solenoid valve of claim 6 wherein said other end of said support rod has a first sealing surface;

and one end of the valve core, which is adjacent to the outlet, is provided with a matching part, the pressure relief hole is formed on the matching part, and the matching part is provided with a second sealing surface which is suitable for matching with the first sealing surface.

10. The electromagnetic valve according to claim 9, wherein a cross-sectional area of the other end of the support rod is gradually reduced in a direction toward the outlet, an outer peripheral surface of the other end of the support rod being the first sealing surface;

the pressure relief hole comprises a first hole section and a second hole section, the second hole section is connected to one end of the first hole section, which is adjacent to the outlet, the cross-sectional area of the first hole section gradually decreases along the direction towards the outlet, and the inner wall surface of the first hole section is the second sealing surface.

11. The electromagnetic valve according to claim 9, wherein an end surface of the other end of the support rod is the first sealing surface, a side surface of the fitting portion facing the first sealing surface is formed as the second sealing surface, and the pressure release hole penetrates through the second sealing surface.

12. The electromagnetic valve according to any one of claims 1-11, wherein the valve body includes:

a valve body, one end of which is far away from the magnetic core assembly is open, and the inlet is formed on the valve body;

the valve seat is arranged at one end, far away from the magnetic core assembly, of the valve body, the valve seat and the valve body jointly define the valve cavity, and the valve seat is provided with the outlet.