CN220102070U - Electromagnetic valve - Google Patents

Abstract

The present utility model provides a solenoid valve comprising: the side wall of the valve body is provided with a circulation port; the base is connected with the valve body and provided with a valve port; the valve core assembly is movably arranged in the valve body; the spring seat is fixed in the valve body; and the return spring is positioned in the valve body. In this embodiment, the base has a valve opening through which the flow medium can pass. The valve core component can move in the guide pipe, and the opening and the closing of the electromagnetic valve are controlled by controlling the opening and the closing of the valve port. The spring holder limits reset spring in the one side that the valve port was kept away from to the circulation mouth to solved high pressure medium and strikeed reset spring and aggravated reset spring and case subassembly frictional problem, and, the first cover section external diameter of spring holder is greater than the external diameter of second cover section, has avoided like this to lead to the resistance big because of the outer wall of spring holder and the inner wall area of valve body contact area is big, has avoided the spring holder to be difficult to the valve body of impressing, makes the assembly of spring holder more convenient, and has reduced the damage of spring holder to the valve body inner wall at the in-process of impressing.

Description

Electromagnetic valve

Technical Field

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

Background

Currently, solenoid valves include normally open solenoid valves and normally closed solenoid valves. For a normally open solenoid valve, the valve port is in a normally open state in a non-energized state. After the power is on, under the action of electromagnetic force and the attraction of the static iron core, the acting force of the return spring is overcome, and the valve port is closed. In the prior art, the outside of solenoid valve adopts split type design, and the air inlet position is placed to reset spring lower part. The lower part of the return spring is placed at the air inlet position, and high-pressure medium can impact the return spring, so that the bottom of the spring is offset, the valve core is subjected to friction aggravation, and the switching valve is affected.

There is therefore a need to optimize existing solenoid valves to at least address the problem of the springs being vulnerable to media impact.

Disclosure of Invention

The utility model provides an electromagnetic valve, which aims to solve the problem that a spring is easy to be impacted by a medium in the prior art.

In order to solve the above problems, the present utility model provides a solenoid valve comprising: the side wall of the valve body is provided with a circulation port; the base is connected with the valve body and provided with a valve port; the valve core assembly is movably arranged in the valve body to open and close the valve opening; the spring seat is fixed in the valve body, the spring seat is positioned at one side of the flow port, which is far away from the valve port, and comprises a first sleeve section and a second sleeve section which are connected with each other, the outer diameter of the first sleeve section is larger than that of the second sleeve section, wherein the outer wall of the first sleeve section is welded and fixed with the inner wall of the valve body, and the outer wall of the second sleeve section is spaced from the inner wall of the valve body; and the return spring is positioned in the valve body, one end of the return spring is abutted with the spring seat, and the other end of the return spring is abutted with the valve core assembly.

Further, the outer wall of the first set of segments is welded to the inner wall of the valve body by brazing or laser welding.

Further, the valve body is an integrated stainless steel pipe; the solenoid valve also includes a first nipple that penetrates the flow port.

Further, the base is located in the valve body, and the outer wall of the base and the inner wall of the valve body are welded and fixed.

Further, the base comprises a first shaft section and a second shaft section which are connected with each other, the outer diameter of the first shaft section is larger than that of the second shaft section, the first shaft section is fixedly connected with the valve body, and the second shaft section is provided with a valve port.

Further, the outer wall of the first shaft section comprises a first inner shrink circumferential surface, a matching circumferential surface and a second inner shrink circumferential surface which are sequentially connected; the first inner shrink circumferential surface and the second inner shrink circumferential surface are respectively provided with a clearance with the inner wall of the valve body, and the fit circumferential surface is welded with the inner wall of the valve body.

Further, the electromagnetic valve further comprises a second connecting pipe, one end of the second connecting pipe penetrates into the hole of the base, the second connecting pipe is welded with the base, one end of the outer wall of the second connecting pipe is provided with a third inner shrinking peripheral surface, the third inner shrinking peripheral surface is positioned in the hole of the base and is provided with a gap with the inner wall of the hole of the base, and the second connecting pipe is communicated with the valve port.

Further, the valve core assembly comprises a valve core and a sealing gasket, the sealing gasket is arranged at one end of the valve core, facing the valve port, the sealing gasket is used for opening and closing the valve port, the outer wall of the valve core is provided with an annular step, the reset spring is sleeved on the valve core, and one end of the reset spring is abutted with the annular step.

Further, the valve core assembly further comprises a gasket and a buffer spring, the gasket is movably arranged in the groove of the valve core, the gasket and the seal are in limit fit towards one side of the valve port, the end part of the valve core is riveted with the gasket, the buffer spring is located in a blind hole of the valve core, one end of the buffer spring towards the valve port is in stop fit with the seal, a balance hole is formed in the side wall of the blind hole, and the balance hole communicates the blind hole with a space outside the valve core.

Further, the solenoid valve still includes quiet iron core, moves iron core and valve rod, and quiet iron core is fixed in the valve body, and quiet iron core has fourth interior shrinkage surface towards the outer wall of the one end of case subassembly, has the clearance between the inner wall of fourth interior shrinkage surface and valve body, moves the iron core activity and sets up in quiet iron core one side that deviates from the case subassembly, and the valve rod passes quiet iron core and is connected with moving the iron core, and the valve rod is used for promoting the case subassembly and removes.

By applying the technical scheme of the utility model, the electromagnetic valve comprises: the side wall of the valve body is provided with a circulation port; the base is connected with the valve body and provided with a valve port; the valve core assembly is movably arranged in the valve body to open and close the valve opening; the spring seat is fixed in the valve body, the spring seat is positioned at one side of the flow port, which is far away from the valve port, and comprises a first sleeve section and a second sleeve section which are connected with each other, the outer diameter of the first sleeve section is larger than that of the second sleeve section, the outer wall of the first sleeve section is fixedly connected with the inner wall of the valve body, and the outer wall of the second sleeve section is spaced from the inner wall of the valve body; and the return spring is positioned in the valve body, one end of the return spring is abutted with the spring seat, and the other end of the return spring is abutted with the valve core assembly. In this embodiment, the base has a valve opening through which the flow medium can pass. The valve core component can move in the guide pipe, and the opening and the closing of the electromagnetic valve are controlled by controlling the opening and the closing of the valve port. The spring holder limits reset spring in the one side that the valve port was kept away from to the circulation mouth, avoided reset spring to receive the impact of the medium of flowing in from the circulation mouth, thereby solved high pressure medium impact reset spring aggravate reset spring and the frictional problem of case subassembly, and, the first cover section external diameter of spring holder is greater than the external diameter of second cover section, the diameter of one section structure in the spring holder is less than the internal diameter of valve body promptly, avoided leading to the resistance big because of the outer wall of spring holder and the inner wall area of valve body big like this, avoided the spring holder to be difficult to impress in the valve body, make the assembly of spring holder more convenient, and reduced the damage to the valve body inner wall at the in-process spring seat of impressing.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 shows a schematic structural diagram of a solenoid valve provided by an embodiment of the present utility model;

FIG. 2 is a schematic view showing a part of the structure of a solenoid valve according to an embodiment of the present utility model;

fig. 3 shows a partial enlargement of the marking of fig. 2.

Wherein the above figures include the following reference numerals:

10. a valve body; 11. a flow port;

20. a base; 21. a valve port; 22. a first shaft section; 221. a first inner shrink circumferential surface; 222. a mating peripheral surface; 223. a second inner peripheral surface; 23. a second shaft section;

30. a valve core assembly; 31. a valve core; 311. an annular step; 312. a blind hole; 313. a balance hole; 32. a sealing gasket; 33. a gasket; 34. a buffer spring;

40. a spring seat; 41. a first sleeve segment; 42. a second set of segments;

50. a return spring;

61. a first connection pipe; 62. a second connection pipe; 621. a third inner shrink circumferential surface;

71. a stationary core; 711. a fourth inner peripheral surface; 72. a movable iron core; 73. a valve rod.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 3, an embodiment of the present utility model provides a solenoid valve including: a valve body 10, the side wall of the valve body 10 having a flow port 11; a base 20 connected to the valve body 10, the base 20 having a valve port 21; a valve body assembly 30 movably provided in the valve body 10 to open and close the valve opening 21; the spring seat 40 is fixed in the valve body 10, the spring seat 40 is positioned on one side of the flow port 11 far away from the valve port 21, the spring seat 40 comprises a first sleeve section 41 and a second sleeve section 42 which are connected with each other, the outer diameter of the first sleeve section 41 is larger than that of the second sleeve section 42, the outer wall of the first sleeve section 41 is welded and fixed with the inner wall of the valve body 10, and the outer wall of the second sleeve section 42 is spaced from the inner wall of the valve body 10; and a return spring 50 positioned in the valve body 10, wherein one end of the return spring 50 is in contact with the spring seat 40, and the other end of the return spring 50 is in contact with the valve element assembly 30.

In this embodiment, the base 20 has a valve port 21, and the flow medium can pass through the valve port 21. The valve element assembly 30 is movable in the valve body 10, and controls the opening and closing of the solenoid valve by controlling the opening and closing of the valve port 21. When the valve port 21 is opened, the communication is performed with the flow port 11, and the valve port 21 and the flow port 11 are oriented perpendicular to each other. The spring seat 40 limits the return spring 50 on one side of the flow port 11 far away from the valve port 21, so that the return spring 50 is prevented from being impacted by the medium flowing in from the flow port 11, the problem that the return spring 50 is impacted by the high-pressure medium to aggravate friction between the return spring 50 and the valve core assembly 30 is solved, the outer diameter of the first sleeve section 41 of the spring seat 40 is larger than that of the second sleeve section 42, namely, the diameter of a section of structure in the spring seat 40 is smaller than that of the valve body, the problem that the resistance is large due to the large contact area between the outer wall of the spring seat 40 and the inner wall of the valve body 10 is avoided, the spring seat 40 is prevented from being difficult to be pressed into the valve body 10, the assembly of the spring seat 40 is more convenient, and the damage of the spring seat 40 to the inner wall of the valve body 10 in the pressing process is reduced.

Wherein the outer wall of the first set of segments 41 is welded to the inner wall of the valve body 10 by brazing or laser welding. If the first sleeve segment 41 is tightly fitted to the valve body 10 without welding, the spring seat 40 is likely to be displaced in use, resulting in an unstable fixation of the spring seat 40. After brazing or laser welding the first sleeve segment 41 to the valve body 10, the strength of the connection is improved and the service life is prolonged.

As shown in fig. 1, the valve body 10 is an integral stainless steel pipe; the solenoid valve further comprises a first connection pipe 61, the first connection pipe 61 penetrating into the flow port 11.

The valve body 10 is integrated and is formed by drawing stainless steel materials, so that multi-section welding in the prior art is avoided, leakage is avoided, and the service life of the valve body 10 is prolonged. The circulation port 11 of the valve body 10 is provided with a turned-over edge, and the first connecting pipe 61 is matched with the turned-over edge, so that the matching area is large, and the connection is more reliable.

As shown in fig. 1, the base 20 is located in the valve body 10, and the outer wall of the base 20 and the inner wall of the valve body 10 are welded and fixed.

The base 20 is fixed in the valve body 10, and may be welded and fixed during actual production, or other connection means for fixing.

As shown in fig. 1, the base 20 includes a first shaft section 22 and a second shaft section 23 connected to each other, the first shaft section 22 having an outer diameter larger than that of the second shaft section 23, the first shaft section 22 being fixedly connected to the valve body 10, and the second shaft section 23 having a valve port 21.

The second shaft section 23 of the base 20 extends through the bore of the spring seat 40 and the valve port 21 is located on a side of the spring seat 40 remote from the first shaft section 22. The flange at the flow port 11 is located between the spring seat 40 and the first shaft section 22, and the first shaft section 22 is in limit fit with the flange. The outer wall of the second shaft section 23 facing one end of the valve core assembly 30 has a tapered surface for ease of installation.

As shown in fig. 3, the outer wall of the first shaft section 22 includes a first inner shrink circumferential surface 221, a mating circumferential surface 222, and a second inner shrink circumferential surface 223 that are connected in order; wherein, the first inner shrink circumferential surface 221 and the second inner shrink circumferential surface 223 are respectively provided with a clearance with the inner wall of the valve body 10, and the matching circumferential surface 222 is welded with the inner wall of the valve body 10.

The outer diameters of the first inner shrink circumferential surface 221 and the second inner shrink circumferential surface 223 are smaller than the inner diameter of the valve body 10, so that the base 20 can be conveniently penetrated into the valve body 10, and the contact resistance is reduced. The mating peripheral surface 222 may be in an interference fit with the inner wall of the valve body 10, and then welded after assembly, so that the base 20 is reliably fixed inside the valve body 10.

As shown in fig. 1, the solenoid valve further includes a second connection pipe 62, one end of the second connection pipe 62 penetrates into the hole of the base 20, the second connection pipe 62 is welded to the base 20, one end of the outer wall of the second connection pipe 62 has a third inner shrink circumferential surface 621, the third inner shrink circumferential surface 621 is located in the hole of the base 20 and has a gap with the inner wall of the hole of the base 20, and the second connection pipe 62 is communicated with the valve port 21. By providing the third tapered surface 621, the second adapter tube 62 is facilitated to be threaded into the bore of the base 20.

Specifically, the second nipple 62 is coaxial with the valve body 10, and the second nipple 62 is secured within the bore of the first shaft segment 22. The first connection pipe 61 is perpendicular to the second connection pipe 62, and the on-off between the first connection pipe 61 and the second connection pipe 62 is controlled by an electromagnetic valve.

As shown in fig. 1 and 2, the valve core assembly 30 includes a valve core 31 and a sealing gasket 32, the sealing gasket 32 is mounted at one end of the valve core 31 facing the valve port 21, the sealing gasket 32 is used for opening and closing the valve port 21, the outer wall of the valve core 31 is provided with an annular step 311, the return spring 50 is sleeved on the valve core 31, and one end of the return spring 50 is abutted with the annular step 311.

The valve core assembly 30 is driven by the acting force to move towards the base 20, the annular step 311 presses the return spring 50, the sealing gasket 32 is attached to the periphery of the valve port 21, at this time, the valve port 21 is closed, the electromagnetic valve is closed, and medium cannot circulate. After the acting force is eliminated, the pressed return spring 50 pushes the annular step 311 to return, at the moment, the sealing gasket 32 is far away from the valve port 21, and the electromagnetic valve is opened. A gap is provided between the outer wall of the valve core 31 and the inner wall of the valve body 10 so that the valve core assembly 30 can freely move within the valve body 10.

As shown in fig. 1, the valve core assembly 30 further includes a spacer 33 and a buffer spring 34, the seal 32 is movably disposed in the groove of the valve core 31, the spacer 33 and the seal 32 are in limit fit toward one side of the valve port 21, the end of the valve core 31 is riveted with the spacer 33, the buffer spring 34 is disposed in a blind hole 312 of the valve core 31, one end of the buffer spring 34 toward the valve port 21 is in limit fit with the seal 32, a balance hole 313 is disposed on a side wall of the blind hole 312, and the balance hole 313 communicates the blind hole 312 with a space outside the valve core 31.

There is a clearance between the gasket 32 and the bottom of the groove. When the electromagnetic valve is closed, the sealing gasket 32 is attached to the valve port 21, the buffer spring 34 has a buffer effect on the displacement of the sealing gasket 32, so that the impact on the sealing gasket 32 is small, and the service life of the sealing gasket 32 is prolonged. The balance hole 313 communicates the blind hole 312 with the space outside the valve core 31, and prevents the pressure of the closed space from forming resistance to the movement of the gasket 32. In a specific embodiment, the valve core 31 is made of stainless steel, the buffer spring 34 is made of stainless steel, the sealing gasket 32 is made of polytetrafluoroethylene, and the gasket 33 is made of stainless steel.

Further, the sealing gasket 32 is provided with a first limit step, and the gasket 33 is in limit fit with the first limit step; the valve core 31 is internally provided with a second limiting step, the second limiting step surrounds the groove, and the gasket 33 is in limiting fit with the second limiting step.

As shown in fig. 1, the solenoid valve further includes a stationary core 71, a movable core 72, and a valve rod 73, wherein the stationary core 71 is fixed in the valve body 10, an outer wall of an end of the stationary core 71 facing the valve core assembly 30 has a fourth inner shrinkage surface 711, a gap is formed between the fourth inner shrinkage surface 711 and an inner wall of the valve body 10, the movable core 72 is movably disposed at a side of the stationary core 71 facing away from the valve core assembly 30, the valve rod 73 passes through the stationary core 71 and is connected with the movable core 72, and the valve rod 73 is used for pushing the valve core assembly 30 to move.

The fourth inner peripheral surface 711 has an outer diameter smaller than the inner diameter of the valve body 10, facilitates the assembly of the stationary core 71, and reduces damage of the stationary core 71 to the inner wall of the valve body 10. In the practical application process, the electromagnetic force and the static iron core 71 attract the movable iron core 72, so that the movable iron core 72 pushes the valve rod 73, the valve rod 73 pushes the valve core assembly 30 to move, the valve port 21 is blocked, and the electromagnetic valve is closed.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A solenoid valve, comprising:

a valve body (10), wherein a side wall of the valve body (10) is provided with a circulation port (11);

a base (20) connected with the valve body (10), wherein the base (20) is provided with a valve port (21);

a valve core assembly (30) movably arranged in the valve body (10) to open and close the valve port (21);

a spring seat (40) fixed in the valve body (10), wherein the spring seat (40) is positioned on one side of the flow port (11) away from the valve port (21), the spring seat (40) comprises a first sleeve section (41) and a second sleeve section (42) which are connected with each other, the outer diameter of the first sleeve section (41) is larger than that of the second sleeve section (42), the outer wall of the first sleeve section (41) is welded and fixed with the inner wall of the valve body (10), and the outer wall of the second sleeve section (42) is spaced from the inner wall of the valve body (10);

and a return spring (50) positioned in the valve body (10), wherein one end of the return spring (50) is in butt joint with the spring seat (40), and the other end of the return spring (50) is in butt joint with the valve core assembly (30).

2. The solenoid valve according to claim 1, characterized in that the outer wall of the first set of segments (41) is welded to the inner wall of the valve body (10) by brazing or laser welding.

3. The solenoid valve according to claim 1, characterized in that said valve body (10) is an integral stainless steel tube; the solenoid valve further comprises a first connection tube (61), and the first connection tube (61) penetrates into the circulation port (11).

4. The solenoid valve according to claim 1, characterized in that said seat (20) is located inside said valve body (10), the outer wall of said seat (20) and the inner wall of said valve body (10) being welded and fixed.

5. The electromagnetic valve according to claim 4, characterized in that the base (20) comprises a first shaft section (22) and a second shaft section (23) connected to each other, the first shaft section (22) having an outer diameter larger than the outer diameter of the second shaft section (23), the first shaft section (22) being fixedly connected to the valve body (10), the second shaft section (23) having the valve port (21).

6. The electromagnetic valve according to claim 5, wherein the outer wall of the first shaft section includes a first inner shrink circumferential surface (221), a mating circumferential surface (222), and a second inner shrink circumferential surface (223) connected in sequence; wherein, the first inner shrink circumferential surface (221) and the second inner shrink circumferential surface (223) are respectively provided with a gap with the inner wall of the valve body (10), and the matching circumferential surface (222) is welded with the inner wall of the valve body (10).

7. The solenoid valve according to claim 1, further comprising a second nipple (62), one end of the second nipple (62) penetrating into the hole of the base (20), the second nipple (62) being welded to the base (20), one end of the outer wall of the second nipple (62) having a third inner peripheral surface (621), the third inner peripheral surface (621) being located in the hole of the base (20) and having a gap with the inner wall of the hole of the base (20), the second nipple (62) being in communication with the valve port (21).

8. The electromagnetic valve according to claim 1, characterized in that the valve core assembly (30) comprises a valve core (31) and a sealing gasket (32), the sealing gasket (32) is mounted at one end of the valve core (31) facing the valve port (21), the sealing gasket (32) is used for opening and closing the valve port (21), an annular step (311) is arranged on the outer wall of the valve core (31), the return spring (50) is sleeved on the valve core (31), and one end of the return spring (50) is abutted against the annular step (311).

9. The solenoid valve according to claim 8, wherein the spool assembly (30) further comprises a gasket (33) and a buffer spring (34), the seal (32) is movably disposed in the groove of the spool (31), the gasket (33) and the seal (32) are in limit fit toward one side of the valve port (21), the end of the spool (31) and the gasket (33) are riveted, the buffer spring (34) is disposed in a blind hole (312) of the spool (31), one end of the buffer spring (34) toward the valve port (21) is in stop fit with the seal (32), a side wall of the blind hole (312) is provided with a balance hole (313), and the balance hole (313) communicates the blind hole (312) with a space outside the spool (31).

10. The electromagnetic valve according to claim 1, further comprising a stationary core (71), a movable core (72) and a valve rod (73), wherein the stationary core (71) is fixed in the valve body (10), an outer wall of one end of the stationary core (71) facing the valve core assembly (30) is provided with a fourth inner shrink circumferential surface (711), a gap is formed between the fourth inner shrink circumferential surface (711) and an inner wall of the valve body (10), the movable core (72) is movably arranged on one side of the stationary core (71) facing away from the valve core assembly (30), the valve rod (73) penetrates through the stationary core (71) and is connected with the movable core (72), and the valve rod (73) is used for pushing the valve core assembly (30) to move.