CN214384270U

CN214384270U - Electromagnetic valve

Info

Publication number: CN214384270U
Application number: CN202120198862.5U
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Climate and Appliance Controls Group Co Ltd
Current assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Priority date: 2020-06-03
Filing date: 2021-01-25
Publication date: 2021-10-12
Anticipated expiration: 2031-01-25
Also published as: CN213206723U

Abstract

The utility model provides an electromagnetic valve, including valve body part, moving iron core part and piston part, piston part includes the piston body, leads disk seat and plunger, piston body and leading disk seat fixed connection, the plunger can be for leading the disk seat displacement, lead the disk seat and include guide valve oral area and lower guide valve oral area, guide valve oral area on can the butt of guide valve core, guide valve oral area under the plunger can the butt, the piston body includes inside convex interior step portion, interior step portion can restrict the plunger and move down. Compared with the background art, the embodiment improves the processing convenience of the lower guide valve opening part.

Description

Electromagnetic valve

Technical Field

The utility model relates to a fluid control technical field particularly, relates to a solenoid valve.

Background

The electromagnetic valve product is widely used. Fig. 1 is a schematic cross-sectional view of a solenoid valve in the background art. As shown in fig. 1, the solenoid valve includes a valve body part 01, a control part 02, and a piston part 03. Valve body part 01 includes main valve mouth portion 011, piston part 03 can axially move for valve body part 01, piston part 03 can butt main valve mouth portion 011, piston part 03 includes piston 031, be located the inner chamber of piston 031 and can break away from piston 031's gasket 033 with restriction plunger 032 for plunger 032 axially moving's plunger 032, piston 031 includes pilot valve mouth portion 0311, lower pilot valve mouth portion 0312, control part 02 includes steel ball 021, steel ball 021 can butt in pilot valve mouth portion 0311, plunger 032 includes toper portion 0321, toper portion 0321 can butt lower pilot valve mouth portion 0312. In the solenoid valve having such a structure, the machining accuracy of the upper pilot valve port portion 0311 and the lower pilot valve port portion 0312 affects the operation performance of the solenoid valve, but the machining of the lower pilot valve port portion 0312 is inconvenient.

In view of this, how to optimize the piston structure of the solenoid valve and improve the processing convenience thereof is a problem to be considered by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electromagnetic valve, valve body part, move the iron core part, the valve body part includes the main valve oral area, move the iron core part including moving iron core, leading case, it can drive to move the iron core leading case axial displacement still includes piston part, piston part can the butt the main valve oral area, piston part includes piston body, leading disk seat and plunger, the piston body with leading disk seat fixed connection, the plunger can for leading disk seat displacement, leading disk seat includes leading disk seat portion and lower leading disk portion, leading case can the butt go up leading disk portion, the plunger can the butt leading disk portion down, the piston body includes inside convex interior step portion, interior step portion can restrict the plunger removes downwards.

The electromagnetic valve comprises a valve body part, a moving iron core part and a piston part, wherein the piston part comprises a piston body, a guide valve seat and a plunger, the piston body is fixedly connected with the guide valve seat, the plunger can move relative to the guide valve seat, the guide valve seat comprises an upper guide valve opening part and a lower guide valve opening part, the guide valve core can abut against the upper guide valve opening part, the plunger can abut against the lower guide valve opening part, the piston body comprises an inner step part protruding inwards, and the inner step part can limit the plunger to move downwards. Compared with the background art, the embodiment improves the processing convenience of the lower guide valve opening part.

Drawings

FIG. 1: the structure schematic diagram of a solenoid valve in the background art;

FIG. 2: the utility model provides a structure schematic diagram of an electromagnetic valve in a valve opening state;

FIG. 3: FIG. 2 is a schematic view of the piston assembly;

FIG. 4: FIG. 3 is a schematic view of the structure of the pilot valve seat;

FIG. 5: the utility model provides a schematic structural diagram of another piston component;

FIG. 6: the utility model provides a structural schematic diagram of a third piston component;

FIG. 7: the enlarged schematic at I in fig. 6;

FIG. 8: FIG. 2 is a schematic structural view of the solenoid valve in a closed state;

FIG. 9: the utility model provides a structural schematic diagram of a fourth piston component;

FIG. 10: the utility model provides a fifth kind of piston element's schematic structure.

Symbolic illustration in fig. 2-10:

1-valve body component, 10-valve cavity;

11-valve body, 111-main orifice, 112-first port, 113-second port;

2-moving iron core part, 21-moving iron core, 22-guide valve core;

3/3A/3B/3C/3D-piston part, 31/31A/31C/31D-piston body, 310-receiving chamber; 311-inner step portion, 3110-through hole;

312/312A-step, 313/313A-extension, 314A-internal thread;

32/32A/32B/32C/32D-guide valve seat, 321-communicating hole;

322-upper pilot valve port, 3220-upper pilot valve port;

323-lower pilot valve port, 3230-lower pilot valve port;

324-chamfer, 325A-external thread, 326B-lug;

327C/327D-body portion, 328C/328D-support portion;

33-plunger, 331-cone, 332-circular table section, 333-cylinder section;

4-control part, 41-coil, 42-static iron core;

43-cannula, 430-lumen of cannula, 44-return spring.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. The upper and lower terms used herein are defined by the positions of the components shown in the drawings, and are used for clarity and convenience of the technical solution, and it should be understood that the terms used herein should not be construed as limiting the scope of the claims.

Fig. 2 is a schematic structural diagram of a solenoid valve in an open state according to the present invention; FIG. 3 is a schematic structural view of the piston assembly of FIG. 2; FIG. 4 is a schematic view of the pilot valve seat of FIG. 3; fig. 8 is a schematic structural view of the solenoid valve in fig. 2 in a valve-closed state.

As shown in fig. 2. The electromagnetic valve comprises a valve body component 1, a movable iron core component 2, a piston component 3 and a control component 4. In this embodiment, the valve body member 1 includes a valve body 11, the valve body 11 is provided with a main orifice portion 111, and the piston member 3 can abut against the main orifice portion 111. The valve body 11 further includes a first port 112 located on a side portion thereof and a second port 113 located on a lower portion thereof, and when the piston member 3 abuts against the main port portion 111, that is, the solenoid valve is in a closed state, the first port 112 communicates with the valve chamber 10 of the solenoid valve, the second port 113 communicates with the main port of the main port portion 111, and the first port 112 and the second port 113 do not communicate.

The control unit 4 includes a coil 41, a stationary core 42, a sleeve 43, and a return spring 44. The plunger element 2 comprises a plunger 21 and a pilot core 22. The cannula 43 is made of stainless steel tubing and has an inner lumen 430. The static iron core 42 is fixed on the inner wall of the upper section of the sleeve 43, the movable iron core 21 is at least partially positioned in the inner cavity 430 of the sleeve 43, one end of the return spring 44 is abutted against the static iron core 42, the other end is abutted against the movable iron core 21, the guide valve core 22 is fixed on the lower section of the movable iron core 21 through riveting, and the movable iron core 21 can axially move along the inner wall of the sleeve 43 and can drive the guide valve core 22 to axially move.

As shown in fig. 2 and 8, the piston member 3 is located in the valve chamber 10 and is axially slidable with respect to the valve body 11. When the coil 41 is deenergized, the return spring 44 presses the plunger member 2, and the plunger member 2 presses the piston member 3, so that the piston member 3 can abut against the main orifice 111. In the present embodiment, the piston member 3 includes a piston body 31, a pilot valve seat 32, and a plunger 33. The piston body 31 is substantially cylindrical, the outer peripheral wall of the piston body 31 is in clearance sliding fit with the inner peripheral wall of the valve body 11, the piston body 31 and the guide valve seat 32 are fixedly connected to form an accommodating cavity 310, the plunger 33 is located in the accommodating cavity 310, and the plunger 33 can slide relative to the piston body 31. The pilot valve seat 32 is located between the pilot valve core 22 and the plunger 33, i.e. the pilot valve core 22 is located above the pilot valve seat 32, and the plunger 33 is located below the pilot valve seat 32. The pilot valve seat 32 includes an upper pilot valve mouth portion 322 and a lower pilot valve mouth portion 323, the pilot valve body 22 is capable of abutting the upper pilot valve mouth portion 322 by being driven by the movable iron core 21, and the plunger 33 is capable of displacing relative to the pilot valve seat 32 to abut the lower pilot valve mouth portion 323.

In this embodiment, the piston body 31 and the guide valve seat 32 are separately arranged, and the piston body 31 and the guide valve seat 32 are fixedly connected, so that the guide valve seat 32 can be separately processed to ensure the processing precision of the lower guide valve opening 323. Compared with the prior art, the structure of the piston part 3 is optimized, the guide valve seat 32 can be independently processed, and the processing convenience of the lower guide valve opening part 323 is improved.

Further, as shown in fig. 3, the piston body 31 includes an inner step 311 protruding inward, the inner step 311 is located at a lower end of the piston body 31, the inner step 311 can limit the downward movement of the plunger 33, and the inner step 311 is integrally formed with the piston body 31. During operation of the solenoid valve, the inner step portion 311 needs to frequently endure the impact of the fluid pressure since it is close to the first port 112 and the second port 113. Compared to the prior art in which the spacer 033 is fixed to the lower end of the piston 031 by caulking (as shown in fig. 1), the present embodiment can improve the service life of the piston member 3 by integrally providing the inner step portion 311 to the piston body 31.

Further, as shown in fig. 3 and 4, the upper pilot valve port portion 322 is flared such that the inner diameter thereof is gradually increased toward the plunger 22, and the lower pilot valve port portion 323 is flared such that the inner diameter thereof is gradually increased toward the main valve port portion 111. The pilot valve core 22 is specifically a steel ball, and the pilot valve core 22 can abut against the upper pilot valve opening 322 under the driving of the movable iron core 21. The plunger 33 includes a circular truncated cone section 332 and a cylindrical section 333, the circular truncated cone section 332 includes a taper section 331, the outer diameter of the taper section 331 is gradually increased toward the main pilot valve portion 111, and the taper section 331 can abut against and seal the lower pilot valve portion 323; the outer peripheral wall of the cylindrical section 333 is in clearance sliding fit with the inner peripheral wall of the piston body 31.

As shown in fig. 3, the piston body 31 includes a stepped portion 312 with an upward stepped surface and an extension 313 extending axially upward. The guide valve seat 32 is machined from a metal material, the guide valve seat 32 is disposed on the step 312 of the piston body 31, and the guide valve seat 32 and the piston body 31 are press-fitted and interference-fitted to be positioned. The upper section of the pilot valve seat 32 is provided with a chamfered portion 324, the upper section of the extension portion 313 is caulked to the chamfered portion 324, and the piston body 31 and the pilot valve seat 32 are fixed by caulking. By the arrangement, the guide valve seat 32 is reliably positioned, and the piston body 31 and the guide valve seat 32 are simply assembled.

Fig. 5 is a schematic structural diagram of another piston component according to the present invention.

As a modification, as shown in fig. 5, the piston member 3A includes a piston body 31A and a guide valve seat 32A, the piston body 31A includes a step 312A having an upward step surface and an extension 313A extending upward in the axial direction, an outer wall of the guide valve seat 32A includes an external thread 325A, an inner wall of the extension 313A includes an internal thread 314, the guide valve seat 32A is screwed and fixed to the extension 313A, and a lower end portion of the guide valve seat 32A abuts against the step surface of the step 312A. Compared with the riveting structure in the above embodiment, the piston body 31A and the guide valve seat 32A are more reliably connected and more resistant to fluid impact in the embodiment through the screw thread fixed connection.

Fig. 6 is a schematic structural diagram of a third piston component provided by the present invention; FIG. 7 is an enlarged schematic view taken at I in FIG. 6;

as another modification, as shown in fig. 6 and 7, in this embodiment, the piston member 3B includes a piston body 31 and a guide valve seat 32B, the piston body 31 includes a stepped portion 312 with an upward step and an axially upward extending portion 313, and the guide valve seat 32B is made of a rubber material or a PTFE material. The piston body 31 and the pilot valve seat 32B are fixed by caulking. In this embodiment, the pilot valve seat 32B is made of a rubber material or a PTFE material, and can improve the sealing performance between the pilot valve body 22 and the upper pilot valve port portion 322, and between the plunger 33 and the lower pilot valve port portion 323.

Of course, not limited to this, other modifications may be developed, for example, the anaerobic adhesive may be coated on the outer circumferential surface of the guide valve seat, the guide valve seat and the piston body may be press-fitted in an interference manner, and the guide valve seat and the piston body may be fixed by the anaerobic adhesive and the interference press-fitting.

Fig. 9 is a schematic structural diagram of a fourth piston assembly according to the present invention.

The present embodiment is different from the above embodiments in the structure of the piston body and the guide valve seat.

In this embodiment, the piston member 3C includes a piston body 31C and a pilot valve seat 32C, and the piston body 31C is eliminated from the stepped portion as compared with the previous embodiment, i.e., the pilot valve seat 32C and the plunger 33 are both disposed in the inner stepped portion 311. The pilot valve seat 32C includes a body portion 327C and a support portion 328C extending axially downward from the body portion 327C, the body portion 327C and the support portion 328C are of an integral structure, the body portion 327C includes the aforementioned upper pilot valve port portion 322 and lower pilot valve port portion 323, the support portion 328C abuts against the inner step portion 311, the support portion 328C is of a cylindrical shape, the plunger 33 is at least partially located in an inner cavity of the support portion 328C, and the plunger 33 is axially slidable relative to the support portion 328C. The piston body 31C has the beneficial effect that the step part is eliminated, so that the piston body 31C is easy to process.

Fig. 10 is a schematic structural diagram of a fifth piston component according to the present invention.

The present embodiment differs from the above embodiments in the structure of the pilot valve seat. The pilot valve seat 32D includes a body portion 327D and a support portion 328D, the body portion 327D and the support portion 328D are separated from each other, the body portion 327D is located above the support portion 328D, the extension portion 313 of the piston body 31 is riveted to the body portion 327D, the body portion 327D abuts against the support portion 328D, and the support portion 328D abuts against the inner step portion 311. The piston body 31D has the advantages that the step portion is eliminated, so that the piston body 31D is easy to machine, the body portion 327D and the support portion 328D are arranged separately, the body portion 327D and the support portion 328D can be machined separately, and machining accuracy of the lower pilot valve opening portion 323 can be guaranteed.

Further, the upper pilot valve port portion 322 includes an upper pilot valve port 3220, the lower pilot valve port portion 323 includes a lower pilot valve port 3230, the pilot valve seat 22 further includes a communication hole 321 communicating the upper pilot valve port 3220 and the lower pilot valve port 3230, the inner step portion 311 of the piston body 31 includes a through hole 3110, and a flow area of the through hole 3110 is larger than a flow area of the communication hole 321. So set up, can guarantee the reliable action of solenoid valve.

The following describes the valve opening operation of the solenoid valve with reference to fig. 2 and 8.

When the second port 113 is used as a fluid inlet and the first port 112 is used as a fluid outlet, due to a pressure difference between the first port 112 and the second port 113, the fluid enters from the second port 113, pushes the plunger 33 to move toward the pilot valve seat 32 side, and abuts against the lower pilot valve port portion 323 of the pilot valve seat 32 through the tapered portion 331 of the plunger 33; after the lower pilot valve port 323 is sealed, as the pressure below the piston body 31 increases, in the de-energized state of the coil 41, the piston member 3 will move upward away from the main valve port 111 against its own weight, the weight of the plunger member 2 and the spring force of the return spring 44, and the main valve port will open, i.e. the solenoid valve will open (as shown in fig. 2), and fluid will enter from the second port 113, flow through the main valve port and into the first port 112. When the coil 41 is energized, the movable iron core 21 overcomes the spring force of the return spring 44 to attract the stationary iron core 42, the movable iron core 21 drives the pilot valve core 22 to move upward, and at this time, the piston member 3 only needs to overcome its own gravity to move upward and leave the main valve port 111, and the main valve port is opened.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. An electromagnetic valve comprises a valve body component and a movable iron core component, wherein the valve body component comprises a main valve opening part, the movable iron core component comprises a movable iron core and a guide valve core, the movable iron core can drive the guide valve core to axially move, and the electromagnetic valve is characterized in that,

the piston component can abut against the main valve opening part, the piston component comprises a piston body, a guide valve seat and a plunger, the piston body is fixedly connected with the guide valve seat, the plunger can move relative to the guide valve seat, the guide valve seat comprises an upper guide valve opening part and a lower guide valve opening part, the guide valve core can abut against the upper guide valve opening part, the plunger can abut against the lower guide valve opening part, the piston body comprises an inward-protruding inner step part, and the inner step part can limit the plunger to move downwards.

2. The solenoid valve according to claim 1, wherein an inner diameter of said upper pilot valve opening portion is gradually increased toward said plunger core, an inner diameter of said lower pilot valve opening portion is gradually increased toward said main valve opening portion, said plunger includes a circular truncated cone section and a cylindrical section, said circular truncated cone section includes a tapered portion, an outer diameter of said tapered portion is gradually increased toward said main valve opening portion, said tapered portion is capable of abutting against said lower pilot valve opening portion, and an outer peripheral wall of said cylindrical section is capable of sliding with respect to an inner peripheral wall of said piston body.

3. The solenoid valve according to claim 1, wherein said piston body includes an axially upwardly extending extension, said pilot valve seat having a chamfered portion at an upper section thereof, said extension being riveted to said chamfered portion, said extension being riveted to said pilot valve seat.

4. The solenoid valve according to claim 1, wherein said piston body includes a step portion having an upward facing step and an axially extending extension portion, said step portion is located above said inner step portion, said pilot valve seat is made of metal material or rubber material or PTFE material, said pilot valve seat is disposed at said step portion, said pilot valve seat is in interference fit with said piston body, and said extension portion is riveted to said pilot valve seat.

5. The solenoid valve of claim 1 wherein said piston body includes an axially upwardly extending extension that is staked to said pilot valve seat, said pilot valve seat includes a body portion and a support portion extending axially downwardly from said body portion, said body portion and said support portion being of unitary construction, said body portion including said upper pilot valve port portion and said lower pilot valve port portion, said support portion abutting said inner step portion, said support portion being of cylindrical shape, said plunger being at least partially located within an interior cavity of said support portion, said plunger being axially slidable relative to said support portion.

6. The solenoid valve of claim 1 wherein said piston body includes an axially upwardly extending extension, said pilot valve seat includes a body portion and a support portion, said body portion and said support portion are of a split construction, said body portion includes said upper pilot valve port portion and said lower pilot valve port portion, said body portion is positioned above said support portion, said extension portion is staked to said body portion, said body portion abuts said support portion, said support portion abuts said inner step portion, said support portion is cylindrical, said plunger is at least partially positioned within an interior cavity of said support portion, said plunger is axially slidable relative to said support portion.

7. The electromagnetic valve according to claim 5 or 6, wherein the pilot spool is located above the body portion, the plunger is located below the body portion, the upper pilot port portion includes an upper pilot port, the lower pilot port portion includes a lower pilot port, the pilot valve seat further includes a communication hole that communicates the upper pilot port and the lower pilot port, the inner step portion has a through hole having a flow area larger than that of the communication hole.