CN221075430U - Normally open electromagnetic valve - Google Patents
Normally open electromagnetic valve Download PDFInfo
- Publication number
- CN221075430U CN221075430U CN202322571239.1U CN202322571239U CN221075430U CN 221075430 U CN221075430 U CN 221075430U CN 202322571239 U CN202322571239 U CN 202322571239U CN 221075430 U CN221075430 U CN 221075430U
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- valve
- hole
- piston
- iron core
- core assembly
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 50
- 238000007789 sealing Methods 0.000 claims abstract description 33
- 230000003068 static effect Effects 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 239000008358 core component Substances 0.000 description 8
- 239000000306 component Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Magnetically Actuated Valves (AREA)
Abstract
The utility model relates to the technical field of valves, in particular to a normally open electromagnetic valve, which comprises a valve body part and an electromagnetic coil, wherein the valve body part comprises a valve body, a valve cover, a movable iron core assembly, a static iron core assembly and a sleeve, a valve port, a liquid inlet and a liquid outlet are formed in the valve body, the electromagnetic coil is arranged outside the sleeve, a valve needle is arranged in the valve body part, the valve needle is linked with the movable iron core assembly, a piston is arranged in the valve cover, the piston is in sealing fit with the inner side wall of the valve cover, the piston is of a stepped structure, a sealing plug capable of sealing the valve port is riveted in the piston, a guide hole matched with the valve needle is formed in the center position of the upper part of the piston, and the piston is in movable fit with a stepped hole formed in the valve cover. The normally open electromagnetic valve provided by the utility model optimizes the valve needle guiding structure, improves the action reliability of the valve needle, and reduces the internal leakage amount when the electromagnetic valve is electrified and closed.
Description
Technical Field
The utility model relates to the technical field of fluid control, in particular to a normally open electromagnetic valve for a refrigerating system.
Background
Fig. 1 is a schematic cross-sectional view of a typical normally open solenoid valve in the background art. As shown in fig. 1, the normally open solenoid valve includes a valve body member 01, a piston member 02, a driving member 03, and a coil 04. Valve body member 01 includes a main valve port 0111. The piston member 02 includes a piston 021, an upper seal 020, and a lower seal 022, and the piston member 02 is axially movable with respect to the valve body member 01, and the lower seal 022 is capable of abutting against the main valve port 0111. The driving component 03 comprises a seal head 030, a sleeve 031, a movable iron core 032, a static iron core 033 and a valve needle 034, a main spring 036 is arranged between the movable iron core 032 and the static iron core 033, a secondary spring 035 is arranged between the seal head 030 and the valve needle 034, and the valve needle 034 can be abutted against the upper sealing body 020. In this structure, when the coil 04 is energized, the plunger 032 slides against the inner wall of one side of the sleeve 031 during the axial movement, and there is a risk of the needle 034 being jammed by biasing.
In view of this, how to optimize the needle guiding structure and improve the operational reliability of the needle is a matter to be considered by those skilled in the art.
Disclosure of utility model
The technical problems to be solved by the utility model are as follows: in the existing normally open electromagnetic valve, the movable iron core can slide against the inner wall of one side of the sleeve in the axial movement process, and the risk of locking the valve needle caused by biasing of the valve needle belt exists. Therefore, the utility model provides the normally open electromagnetic valve, which optimizes the valve needle guiding structure, improves the action reliability of the valve needle and reduces the internal leakage when the electromagnetic valve is electrified to be closed.
In order to solve the technical problems, the utility model provides a normally open electromagnetic valve which comprises a valve body part and an electromagnetic coil, wherein the valve body part comprises a valve body, a valve cover, a movable iron core assembly, a static iron core assembly and a sleeve, a valve port, a liquid inlet and a liquid outlet are formed in the valve body, the movable iron core assembly and the static iron core assembly are both arranged in the sleeve, a lower return spring is arranged between the movable iron core assembly and the static iron core assembly, the electromagnetic coil is arranged outside the sleeve, the upper end of the valve cover is connected with the static iron core assembly, the lower end of the valve cover is connected with the valve body, a valve needle is further arranged in the valve body part, the valve needle is in linkage with the movable iron core assembly, the valve needle penetrates through the static iron core assembly, a piston is arranged in the valve cover and is in sealing fit with the inner side wall of the valve cover, the piston is of a stepped structure, a sealing plug capable of sealing the valve port is riveted in the piston, a channel communicated with the valve port is arranged in the sealing plug, a guide hole matched with the valve needle is arranged at the center of the upper part of the piston, after the electromagnetic coil moves downwards along the guide hole, the upper end of the guide hole is connected with the static iron core assembly, the valve needle is connected with the valve needle, and the valve needle is movably matched with the valve needle hole.
According to the normally open electromagnetic valve, the axial movement of the valve needle is guided through the central guide hole at the upper end part of the piston, so that the action reliability of the valve needle is improved, the coaxiality of the valve needle and the guide valve port is ensured, and the electromagnetic valve is electrified, and when the valve needle and the guide valve port are in contact and close, the sealing performance is good.
The piston is designed into a stepped structure, the outer diameters of the upper part and the lower part of the piston are respectively movably matched with stepped holes in the valve cover, the length of the piston is relatively increased, and the coaxiality is good when the piston slides up and down, so that the sealing performance is good when the central sealing plug of the piston is closely connected with the main loose joint, and the internal leakage of the electromagnetic valve is small.
Preferably, the channel is a through hole, the through hole is arranged at the center of the sealing plug, the lower end of the through hole is communicated with the valve port, and the upper end of the through hole can be plugged by the valve needle.
Preferably, the guide hole and the valve needle are coaxially arranged with the through hole.
Preferably, the piston comprises a first boss and a second boss, the diameter of the second boss is larger than that of the first boss, the first boss and the second boss form a stepped structure of the piston, and the guide hole is arranged on the first boss;
The step hole that is equipped with in the valve gap includes first step hole and second step hole, first boss and first step hole cooperation, the second boss with the cooperation of second step hole.
Preferably, a piston ring is arranged on the piston, and the piston ring is matched with the second step hole at the lower end of the valve cover.
Preferably, a sealing ring is arranged between the valve cover and the valve body.
Preferably, the lower end of the valve cover is in threaded fit with the valve body.
Preferably, a sliding hole is formed in the movable iron core assembly, the valve needle is in sliding fit with the sliding hole, an upper spring is arranged in the sliding hole, and the elastic force of the upper spring drives the valve needle to axially move.
Preferably, the valve needle is provided with a limiting part, the limiting part is fixedly connected with the valve needle or integrally formed, the upper spring is sleeved on the valve needle, one end of the upper spring is abutted against the end surface of the sliding hole of the movable iron core assembly, and the other end of the upper spring is abutted against the limiting part.
Preferably, a fixed ring is arranged in the movable iron core assembly, an inner hole of the fixed ring is in movable fit with the valve needle, one end of the fixed ring abuts against the lower reset spring, a spring guide hole is arranged in the movable iron core assembly, and the fixed ring is in interference fit with the spring guide hole.
The utility model has the beneficial effects that:
1. the axial movement of the valve needle is guided through the central guide hole at the upper end part of the piston, so that the action reliability of the valve needle is improved, the coaxiality of the valve needle and the guide valve port is ensured, the electromagnetic valve is electrified, and the sealing performance is good when the valve needle and the guide valve port are in contact closing.
2. The piston is designed into a stepped structure, the outer diameters of the upper part and the lower part of the piston are respectively movably matched with stepped holes in the valve cover, the length of the piston is relatively increased, and the coaxiality is good when the piston slides up and down, so that the sealing performance is good when the central sealing plug of the piston is closely connected with the main loose joint, and the internal leakage of the electromagnetic valve is small.
Drawings
The utility model will be further described with reference to the drawings and examples.
Fig. 1 is a schematic diagram of a structure of a normally open solenoid valve in the related art.
Fig. 2 is a sectional view of the normally open solenoid valve of the present utility model in a deenergized state.
Fig. 3 is a sectional view showing an energized state of a solenoid of a normally open solenoid valve according to the present utility model.
Fig. 4 is an enlarged view at a in fig. 2.
Fig. 5 is an enlarged view at B in fig. 3.
Fig. 6 is an enlarged view at C in fig. 3.
Fig. 7 is a schematic view of the structure of the piston and sealing plug of the present utility model.
Fig. 8 is a schematic structural view of the valve cover of the present utility model.
In the figure: 1. an electromagnetic coil; 2. a valve body; 3. a valve cover; 4. a movable iron core assembly; 5. a stationary core assembly; 6. a sleeve; 7. a valve port; 8. a liquid inlet; 9. a lower return spring; 10. a valve needle; 11. a piston; 12. a sealing plug; 13. a guide hole; 14. a first stepped hole; 15. a through hole; 16. a first boss; 17. a second boss; 18. piston rings; 19. a seal ring; 20. a sliding hole; 21. an upper spring; 22. a limit part; 23. a fixing ring; 24. a spring guide hole; 25. and a second stepped hole.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more. In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 2 to 8, the utility model provides a normally open electromagnetic valve, which comprises a valve body component and an electromagnetic coil 1, wherein the valve body component comprises a valve body 2, a valve cover 3, a movable iron core component 4, a static iron core component 5 and a sleeve 6, a valve port 7, a liquid inlet 8 and a liquid outlet are arranged on the valve body 2, the movable iron core component 4 and the static iron core component 5 are both arranged in the sleeve 6, a lower return spring 9 is arranged between the movable iron core component 4 and the static iron core component 5, the electromagnetic coil 1 is arranged outside the sleeve 6, the upper end of the valve cover 3 is connected with the static iron core component 5, the lower end of the valve cover 3 is connected with the valve body 2, and the lower end of the valve cover 3 is in threaded fit with the valve body 2.
The valve body part is internally provided with a valve needle 10, the valve needle 10 is in linkage with the movable iron core assembly 4, the valve needle 10 penetrates through the static iron core assembly 5, the valve cover 3 is internally provided with a piston 11, the piston 11 is in sealing fit with the inner side wall of the valve cover 3, the piston 11 is of a ladder-shaped structure, a sealing plug 12 capable of sealing the valve port 7 is riveted in the piston 11, a channel communicated with the valve port 7 is arranged on the sealing plug 12, the upper center position of the piston 11 is provided with a guide hole 13 matched with the valve needle 10, the valve needle 10 moves downwards along the guide hole 13 to seal the upper end of the channel, and the piston 11 is in movable fit with a step hole arranged in the valve cover 3.
When the electromagnetic coil 1 is electrified, under the action of a magnetic field of the electromagnetic coil 1, the movable iron core component 4 moves downwards, so that the valve needle 10 is driven to move downwards, the valve needle 10 slides in the guide hole 13 in the process of moving downwards, the position deviation of the valve needle 10 in the process of moving downwards is avoided, the upper end of a channel is blocked by the downward movement of the valve needle 10, the diameter of the upper end of the channel is smaller than the diameter of the valve needle 10, the valve needle 10 continuously moves downwards after being propped against the sealing plug 12, and the sealing plug 12 and the piston 11 are driven to move downwards until the lower end of the sealing plug 12 seals the valve port 7, and the valve port 7 is closed.
The passageway is through-hole 15, and through-hole 15 sets up in the center of sealing plug 12, and the lower extreme and the valve port 7 intercommunication of through-hole 15, and the upper end of through-hole 15 can be by needle 10 shutoff, and guiding hole 13, needle 10 and through-hole 15 coaxial arrangement.
In order to improve the coaxiality of the valve needle 10, the guide hole 13 and the through hole 15, the piston 11 comprises a first boss 16 and a second boss 17, the diameter of the second boss 17 is larger than that of the first boss 16, the first boss 16 and the second boss 17 form a stepped structure of the piston 11, the guide hole 13 is arranged on the first boss 16, the stepped hole arranged in the valve cover 3 comprises a first stepped hole 14 and a second stepped hole 25, the first boss 16 is matched with the first stepped hole 14, and the second boss 17 is matched with the second stepped hole 25; the piston 11 is provided with a piston ring 18, the piston ring 18 is matched with a second step hole 25 at the lower end of the valve cover 3, and a sealing ring 19 is arranged between the valve cover 3 and the valve body 2.
The movable iron core assembly 4 is internally provided with a sliding hole 20, the valve needle 10 is in sliding fit with the sliding hole 20, an upper spring 21 is arranged in the sliding hole 20, the elastic force of the upper spring 21 drives the valve needle 10 to axially move, when the movable iron core assembly 4 moves downwards, the upper spring 21 is compressed, and under the elastic force of the upper spring 21, the valve needle 10 moves downwards to block the through hole 15 and drive the sealing plug 12 and the piston 11 to move downwards
The valve needle 10 is provided with a limiting part 22, the limiting part 22 is fixedly connected with the valve needle 10 or integrally formed, an upper spring 21 is sleeved on the valve needle 10, one end of the upper spring 21 is abutted against the end face of a sliding hole of the movable iron core assembly 4, the other end of the upper spring 21 is abutted against the limiting part 22, a fixed ring 23 is arranged in the movable iron core assembly 4, an inner hole of the fixed ring 23 is movably matched with the valve needle 10, one end of the fixed ring 23 is abutted against a lower reset spring 9, a spring guide hole 24 is arranged in the movable iron core assembly 4, and the fixed ring 23 is in interference fit with the spring guide hole 24.
The utility model has the beneficial effects that:
1. The axial movement of the valve needle 10 is guided by the central guide hole 13 at the upper end part of the piston 11, so that the action reliability of the valve needle 10 is improved, the coaxiality of the valve needle 10 and the guide valve port 7 is ensured, and the sealing performance is good when the electromagnetic valve is electrified and the valve needle 10 is in contact closing with the guide valve port 7.
2. The piston 11 is designed into a stepped structure, the outer diameters of the upper part and the lower part of the piston 11 are respectively movably matched with stepped holes in the valve cover 3, the length of the piston 11 is relatively increased, and when the piston 11 slides up and down, the coaxiality is good, so that when the central sealing plug 12 of the piston 11 is closely connected with a main movable port, the tightness is good, and the leakage in the electromagnetic valve is small.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined as the scope of the claims.
Claims (10)
1. The normally open electromagnetic valve comprises a valve body part and an electromagnetic coil (1), wherein the valve body part comprises a valve body (2), a valve cover (3), a movable iron core assembly (4), a static iron core assembly (5) and a sleeve (6), a valve port (7), a liquid inlet (8) and a liquid outlet are arranged on the valve body (2), the movable iron core assembly (4) and the static iron core assembly (5) are arranged in the sleeve (6), a lower reset spring (9) is arranged between the movable iron core assembly (4) and the static iron core assembly (5), the electromagnetic coil (1) is arranged outside the sleeve (6), the upper end of the valve cover (3) is connected with the static iron core assembly (5), the lower end of the valve cover (3) is connected with the valve body (2), a valve needle (10) is also arranged in the valve body part in a linkage manner, the valve needle (10) penetrates through the static iron core assembly (5), the electromagnetic valve is characterized in that a piston (11) is arranged in the valve cover (3), the piston (11) is matched with the inner side wall of the valve cover (3) in a step manner, the valve port (11) is sealed, the valve port (11) can be riveted, and the valve port (11) can be sealed, the sealing plug (12) is provided with a channel communicated with the valve port (7), the center position of the upper part of the piston (11) is provided with a guide hole (13) matched with the valve needle (10), the valve needle (10) moves downwards along the guide hole (13) to block the upper end of the channel, and the piston (11) is movably matched with a step hole arranged in the valve cover (3).
2. The normally open electromagnetic valve according to claim 1, characterized in that the passage is a through hole (15), the through hole (15) is provided in the center of the sealing plug (12), the lower end of the through hole (15) communicates with the valve port (7), and the upper end of the through hole (15) can be blocked by the valve needle (10).
3. The normally open solenoid valve according to claim 2, characterized in that the pilot hole (13), the needle (10) are arranged coaxially with the through hole (15).
4. The normally open solenoid valve according to claim 1, wherein the piston (11) includes a first boss (16) and a second boss (17), the second boss (17) having a larger diameter than the first boss (16), the first boss (16) and the second boss (17) forming a stepped structure of the piston (11), the pilot hole (13) being provided on the first boss (16);
The step hole arranged in the valve cover (3) comprises a first step hole (14) and a second step hole (25), the first boss (16) is matched with the first step hole (14), and the second boss (17) is matched with the second step hole (25).
5. The normally open electromagnetic valve according to claim 4, characterized in that a piston ring (18) is provided on the piston (11), and the piston ring (18) is matched with a second stepped hole (25) at the lower end of the valve cover (3).
6. The normally open solenoid valve according to claim 5, characterized in that a sealing ring (19) is provided between the valve cover (3) and the valve body (2).
7. The normally open solenoid valve according to claim 1, characterized in that the lower end of the valve cover (3) is screw-fitted with the valve body (2).
8. The normally open electromagnetic valve according to claim 1, characterized in that a sliding hole (20) is formed in the movable iron core assembly (4), the valve needle (10) is in sliding fit with the sliding hole (20), an upper spring (21) is arranged in the sliding hole (20), and the elastic force of the upper spring (21) drives the valve needle (10) to move along the axial direction.
9. The normally open electromagnetic valve according to claim 8, characterized in that the valve needle (10) is provided with a limit portion (22), the limit portion (22) is fixedly connected with the valve needle (10) or integrally formed, the upper spring (21) is sleeved on the valve needle (10), one end of the upper spring (21) is abutted against the end face of the sliding hole of the movable iron core assembly (4), and the other end of the upper spring (21) is abutted against the limit portion (22).
10. The normally open electromagnetic valve according to claim 9, characterized in that a fixed ring (23) is arranged in the movable iron core assembly (4), an inner hole of the fixed ring (23) is movably matched with the valve needle (10), one end of the fixed ring (23) is propped against the lower return spring (9), a spring guide hole (24) is arranged in the movable iron core assembly (4), and the fixed ring (23) is in interference fit with the spring guide hole (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322571239.1U CN221075430U (en) | 2023-09-21 | 2023-09-21 | Normally open electromagnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322571239.1U CN221075430U (en) | 2023-09-21 | 2023-09-21 | Normally open electromagnetic valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221075430U true CN221075430U (en) | 2024-06-04 |
Family
ID=91262758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322571239.1U Active CN221075430U (en) | 2023-09-21 | 2023-09-21 | Normally open electromagnetic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221075430U (en) |
-
2023
- 2023-09-21 CN CN202322571239.1U patent/CN221075430U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |