CN220204674U - Control valve - Google Patents

Abstract

The utility model discloses a control valve, wherein a transmission part comprises an abutting surface, a main valve core part comprises an abutting matching surface and a pilot valve opening part, the abutting matching surface is arranged around the pilot valve opening part, the abutting surface is arranged around the pilot valve opening part, and the abutting surface can abut against the abutting matching surface, so that the action performance of the main valve core part can be improved.

Description

Control valve

Technical Field

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

Background

Fig. 1 is a schematic diagram of a control valve in a closed state in the related art. As shown in fig. 1, the control valve includes a valve body part 01, an upper core 02, a lower core 03, a spring 04, a push rod 05, a sealing plug 06, a distance rod 07, and a piston part 08. The valve body part 01 comprises a main valve port 011, the piston part 08 comprises a stop piston 081 and a sealing element 082, the stop piston 081 is provided with a guide valve port 083, the distance rod 07 is positioned between the upper iron core 02 and the stop piston 081, and the lower iron core 03 is fixedly connected with the sealing plug 06. When the control valve is powered off and closed, the lower iron core 03 is firstly separated from the upper iron core 02 to move downwards, the sealing plug 06 is propped against the pilot valve port 083, the upper iron core 02, the distance rod 07 and the stop piston 081 move downwards together under the action of pressure difference force, at the moment, the upper iron core 02 props against the distance rod 07, and the distance rod 07 props against the stop piston 081; when the control valve is electrified to open the valve, the lower iron core 03 is firstly attracted with the upper iron core 02, the push rod 05 needs to be lifted upwards against the spring force of the spring 04 in the attraction process, so that the valve guide port 083 is opened, the piston component 08 moves upwards together with the distance rod 07 and the upper iron core 02 under the action of the up-down pressure difference, so that the main valve port 011 is opened, and at the moment, the stop piston 081 supports the distance rod 07, and the distance rod 07 supports the upper iron core 02. Since the position of the stop piston 081 against the distance rod 07 is located at the side, the stop piston 081 is biased to a certain extent by the pressing action of the distance rod 07 during the up-and-down movement, and the operation performance of the stop piston 081 may be affected.

In view of this, it is a matter of concern to those skilled in the art how to improve the structural design of the control valve to improve the actuation performance of the piston.

Disclosure of Invention

The utility model provides a control valve, which comprises a main valve opening part, a main valve core part, an iron core part and a transmission part, wherein the iron core part comprises a sleeve, a first movable iron core and a second movable iron core, the sleeve is fixedly connected with the valve body part, the main valve core part can move relative to the sleeve to abut against the main valve opening part, the first movable iron core and the second movable iron core are at least partially positioned in an inner cavity of the sleeve, the transmission part comprises a rod part and an abutting part, the rod part penetrates through the second movable iron core, the rod part can move relative to the second movable iron core, the first movable iron core can abut against the rod part, the main valve core part comprises an abutting matching surface and a pilot valve opening part, the abutting matching surface is arranged around the pilot valve opening part, the abutting surface is arranged around the pilot valve opening part, and the abutting surface can abut against the abutting matching surface.

According to the control valve provided by the utility model, the main valve core part comprises the abutting matching surface and the pilot valve opening part, the abutting matching surface is arranged around the pilot valve opening part, the transmission part comprises the abutting surface, the abutting surface is arranged around the pilot valve opening part, and the abutting surface can abut against the abutting matching surface.

Drawings

Fig. 1: a schematic structural diagram of a control valve in a valve closing state in the background art;

fig. 2: the utility model provides a schematic cross-sectional view of a control valve in a valve closing state;

fig. 3: FIG. 2 is a schematic cross-sectional view of the control valve in a fully open state;

fig. 4a: fig. 2 is a schematic perspective view of a transmission component;

fig. 4b: FIG. 2 is a schematic cross-sectional view of a transmission component;

fig. 5: the present utility model provides a schematic cross-sectional view of another main valve core member;

fig. 6: fig. 5 is a schematic perspective view of the main spool.

Symbol description in fig. 2-6:

1-valve body part, 11-valve body;

111-a main valve port, 112-a ring portion;

12-valve cover, 120-central hole;

2/2A-main spool part, 210A-annular groove;

21/21A-main valve core, 211-guide part;

2111/231A-abutment mating surface, 2112/232A-pilot valve mouth;

212-piston part, 22/22A-gasket;

213-body portion, 214-extension;

2140-grooves, 2141-male threaded portions;

2142-upper end face, 23A-guide;

233A-an internal thread portion, 234A-an internal top surface;

24-seals;

3-core components;

31-sleeve, 310-lumen;

32-a first movable iron core and 33-a second movable iron core;

331-mounting slots;

332-upper accommodation hole, 333-lower accommodation hole;

34-end socket and 35-spring;

36-ejector rod and 37-valve guide core;

4-transmission parts, 41-transmission rods;

411-the lower end face of the transmission rod and 42-the transmission plate;

421-abutment face, 422-central through hole;

423-mounting holes, 424-upper end face.

Detailed Description

The present utility model will be further described in detail below with reference to the drawings and detailed description for the purpose of better understanding of the technical solution of the present utility model to those skilled in the art. It is evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. The terms upper, lower, etc. are defined herein with respect to the positions of the components shown in fig. 2, and are used merely for clarity and convenience in describing the technical solution, and it should be understood that the terms upper, lower, etc. should not be construed as limiting the scope of the present application; it should also be understood that the structural relationships described in connection with, fixed to, abutting, etc., are intended to include both direct and indirect methods, unless specifically stated otherwise to embody the inventive concepts.

FIG. 2 is a schematic cross-sectional view of a control valve according to the present utility model in a closed state; FIG. 3 is a schematic cross-sectional view of the control valve of FIG. 2 in a fully open state; FIG. 4a is a schematic perspective view of the transmission component of FIG. 2; fig. 4b is a schematic cross-sectional view of the transmission member of fig. 2.

As shown, in this embodiment, the control valve is embodied as a pilot-operated solenoid valve comprising a valve body part 1, a main valve core part 2, a core part 3 and a transmission part 4.

The valve body member 1 includes a valve body 11 and a valve cap 12. In this particular embodiment, the valve body 11 includes a main valve portion 111 and an annular portion 112. The inner wall of the annular portion 112 and the outer wall of the valve cover 12 are fixed by screw fitting, and the main valve core member 2 is movable relative to the annular portion 112 of the valve body 11 in the longitudinal direction of the control valve to abut against the main valve port 111. The valve cap 12 comprises a central hole 120, into which central hole 120 the sleeve 31 of the core element 3 extends and is welded to the valve cap 12.

As shown in fig. 2, the main valve core member 2 includes a main valve spool 21 and a gasket 22. The main valve core 21 includes a guide portion 211 and a piston portion 212, the guide portion 211 has a cylindrical shape, and an outer peripheral wall of the guide portion 211 is in clearance sliding fit with an inner wall of the sleeve 31, that is, the inner wall of the sleeve 31 can guide the main valve core 21 during the longitudinal movement of the main valve core member 2 along the control valve. The guide portion 211 specifically includes an abutment mating surface 2111 and a pilot valve mouth portion 2112, the pilot valve mouth portion 2112 protruding upward from the abutment mating surface 2111 in the axial direction of the sleeve 31, the abutment mating surface 2111 being disposed around the pilot valve mouth portion 2112. The piston portion 212 and the gasket 22 are fixedly connected, and the gasket 22 can abut against the main valve portion 111, thereby realizing control valve closing.

The core member 3 includes the aforementioned sleeve 31, the first core 32, the second core 33, the head 34, the spring 35, the push rod 36, and the pilot valve core 37. The sleeve 31 is made of stainless steel material, the lower end of which is fixed to the valve cover 12 by welding, and the upper end of which is fixed to the head 34 by welding. The guide portion 211 of the main spool member 2 is located in the inner cavity 310 of the sleeve 31, and the guide portion 211 is movable relative to the sleeve 31. The first movable iron core 32 and the second movable iron core 33 are located in the inner cavity 310 of the sleeve 31, and the second movable iron core 33 is located below the first movable iron core 32. The second plunger 33 is fixedly connected with the pilot valve core 37, and the second plunger 33 can drive the pilot valve core 37 to move along the axial direction of the sleeve 31, so that the pilot valve core 37 can abut against the pilot valve mouth 2112.

The transmission member 4 includes a rod portion and an abutment portion, the rod portion is provided through the second plunger 33, the first plunger 32 is capable of abutting against the rod portion, the abutment portion includes an abutment surface 421, the abutment surface 421 is provided around the pilot valve opening portion 2112, and the abutment surface 421 is capable of abutting against the abutment mating surface 2111.

Specifically, the transmission member 4 includes a transmission rod 41 and a transmission plate 42, and the transmission rod 41 and the transmission plate 42 are fixedly connected. The transmission rod 41 extends along the axial direction of the sleeve 31, penetrates through the second movable iron core 33, the transmission rod 41 can axially move relative to the second movable iron core 33, the first movable iron core 32 can abut against the transmission rod 4, and the transmission rod 41 comprises the rod part; the transmission plate 42 is annular and includes the abutment portion.

It should be noted that, in this embodiment, the transmission rod 41 and the transmission plate 42 are separate parts, which is convenient for processing and saves materials, and it is conceivable that the transmission rod 41 and the transmission plate 42 may be an integral structure, and formed integrally by machining, metal powder metallurgy or plastic injection molding.

Compared with the background art, in the embodiment, by arranging the transmission plate 42, the abutting surface 421 of the transmission plate 42 is arranged around the pilot valve mouth 2112, the abutting surface 2111 of the main valve core part 2 is also arranged around the pilot valve mouth 2112, the abutting surface 421 abuts against the abutting surface 2111, the situation that the single side of the stop piston 081 is stressed in the background art is improved, the single side local force can be distributed to the whole transmission plate 42 in the scheme of the embodiment, so that the abutting surface 2111 of the main valve core part 2 is uniformly stressed, the main valve core part 2 is not easy to incline in the axial moving process of the sleeve 31, the abrasion probability of the main valve core 21 of the main valve core part 2 and the sleeve 31 is reduced, and the action performance of the main valve core part 2 is improved.

As shown in fig. 4a and 4b, the transmission rod 41 is specifically made of stainless steel rod material, and the transmission plate 42 is a metal ring. The transmission plate 42 includes a central through hole 422 and a mounting hole 423, the mounting hole 423 is located outside the central through hole 422 in the radial direction of the transmission plate 42, the pilot valve port portion 2112 penetrates the central through hole 422, and the lower end portion of the transmission rod 41 is located in the mounting hole 423. In this embodiment, the transmission rod 41 and the transmission plate 42 may be fixed by interference press-fitting, or may be fixed by welding, or may be fixed by interference press-fitting first and then by welding. The drive plate 42 is designed in such a way that it is simple in construction and easy to assemble with the drive rod 41.

The mounting hole 423 may be a through hole or a blind hole.

Further, the outer peripheral wall of the driving plate 42 is in clearance sliding fit with the inner wall of the sleeve 31, the lower end surface of the driving plate 42 is a plane, the lower end surface of the driving plate 42 is used as an abutting surface 421, and the plane where the abutting surface 421 is located is perpendicular to the central axis of the driving rod 41. The abutment mating surface 2111 is also a plane, and the plane of the abutment surface 421 is parallel to the plane of the abutment mating surface 2111. It should be noted that "perpendicular" and "parallel" are not absolute perpendicular or parallel in a mathematical sense, and are limited by tolerance and machining assembly process in actual machining process, and allow for certain deviation.

The beneficial effect of above-mentioned structure lies in: the outer peripheral wall of the transmission plate 42 is in clearance sliding fit with the inner wall of the sleeve 31, and the transmission rod 41 is perpendicular to the transmission plate 42, so that the transmission part 4 is not easy to deflect in the axial movement process of the sleeve 31, and the action reliability of the transmission part 4 is improved. The abutment surface 421 and the abutment mating surface 2111 are both planes, and are arranged in parallel, and the planes are abutted against each other to distribute the force of the transmission rod 41 to the whole transmission plate 42, so that the main valve core 21 is uniformly stressed and is not easy to deflect, and the action reliability of the main valve core part 2 is improved.

Further, as shown in fig. 4b, in the axial direction of the sleeve 31, the lower end face 411 of the transmission rod 41 is not lower than the lower end face of the transmission plate 42, that is, not lower than the abutment face 421, so that the transmission plate 42 can be ensured to be in planar contact with the main valve element 21 without interference. On the other hand, the upper end surface 424 of the transmission plate 42 is flat, and the upper end surface 424 of the transmission plate 42 is not higher than the pilot valve port portion 2112 in the axial direction of the sleeve 31, so that the pilot valve core 37 and the pilot valve port portion 2112 can be reliably sealed.

As shown in fig. 3, the second plunger 33 includes a mounting groove 331 opened toward the inner wall of the sleeve 31, and the transmission rod 41 is partially located in the mounting groove 331. Further, the second plunger 33 further includes an upper accommodating hole 332 and a lower accommodating hole 333, the ejector rod 36 is partially located in the upper accommodating hole 332, the spring 35 abuts against the ejector rod 36, the ejector rod 36 abuts against the bottom of the upper accommodating hole 332, the pilot valve core 37 is at least partially located in the lower accommodating hole 333, the pilot valve core 37 is tightly matched with the wall of the lower accommodating hole 333, and the pilot valve core 37 can abut against the pilot valve opening 2112. By such arrangement, compared with the prior art, the pilot valve core 37 is not frequently extruded by the transmission rod 41, and the service life of the pilot valve core 37 can be prolonged.

FIG. 5 is a schematic cross-sectional view of another main valve core member provided by the present utility model; fig. 6 is a schematic perspective view of the main spool of fig. 5.

The present embodiment is different from the above embodiment in the structure of the main valve core member 2A, the main valve core member 2A includes a guide member 23A, a main valve core 21A, and a gasket 22A, and the guide member 23A and the main valve core 21A are of a split structure, and are fixedly connected. The guide member 23A has a substantially hollow cylindrical shape, and the outer peripheral wall of the guide member 23A is in clearance sliding engagement with the inner wall of the sleeve 31, and the guide member 23A includes an abutment engagement surface 231A and a pilot valve opening 232A. The main valve element 21A is fixedly connected to a gasket 22A, and the gasket 22A can abut against the main valve opening 111. The guide piece 23A and the main valve core 21A are arranged separately, so that the processing of each part is convenient, and the material is saved.

In this embodiment, the main valve core 21A includes a body 213 and an extension 214 extending upward from the body 213 along the axial direction of the sleeve 31, the body 213 is fixedly connected with the gasket 22A, the outer wall of the extension 214 includes an external thread 2141, the inner wall of the guide member 23A includes an internal thread 233A, the extension 214 extends into the inner cavity of the guide member 23A, and the external thread 2141 is in threaded engagement with the internal thread 233A to achieve the fixed connection between the guide member 23A and the main valve core 21A.

Further, the extension 214 further includes a groove 2140, wherein the groove 2140 is located below the external thread 2141. The main spool part 2A further includes a seal 24, the seal 24 is made of soft material, and the seal 24 is elastically abutted between the groove wall of the groove 2140 and the inner wall of the guide 23A. The main spool 21A includes an annular groove 210A, the annular groove 210A is provided around the extension 214, a lower end face of the guide 23A is in contact with a groove bottom of the annular groove 210A, the guide 23A includes an inner top face 234A, the inner top face 234A is located above the inner threaded portion 233A, and a distance is provided between the inner top face 234A and an upper end face 2142 of the extension 214. This arrangement makes it possible to bring the lower end surface of the guide piece 23A into contact with the groove bottom of the annular groove 210A to secure the guide piece 23A and the main spool 21A in place.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Claims (9)

1. The utility model provides a control valve, includes valve body part, valve body part includes main valve oral area, its characterized in that still includes main valve core part, iron core part and drive unit, the iron core part includes sleeve pipe, first iron core and the second iron core of moving, the sleeve pipe with valve body part fixed connection, main valve core part can move for the sleeve pipe is with the butt main valve oral area, first iron core of moving the second iron core of moving is located at least partially the sheathed tube inner chamber, drive unit includes pole portion and butt portion, the pole portion runs through the second iron core of moving, the pole portion can move for the second iron core of moving, first iron core of moving can with the pole portion, main valve core part includes butt mating face and pilot valve oral area, the butt mating face is around the pilot valve oral area sets up, the butt face includes the butt face, the butt face is around the pilot valve oral area sets up, the butt face can with the butt mating face.

2. The control valve of claim 1, wherein the transmission member comprises a transmission rod and a transmission plate, the transmission rod comprises the rod portion, the transmission rod extends along the axial direction of the sleeve, the transmission rod is fixedly connected with the transmission plate, the transmission plate comprises the abutting portion, the transmission plate is in a ring shape, the transmission plate comprises a central through hole and a mounting hole, the mounting hole is located on the outer side of the central through hole in the radial direction of the transmission plate, the pilot valve opening protrudes upwards from the abutting matching surface along the axial direction of the sleeve, the pilot valve opening penetrates through the central through hole, and the lower end portion of the transmission rod is located in the mounting hole.

3. The control valve according to claim 2, wherein the outer peripheral wall of the transmission plate is in clearance sliding fit with the inner wall of the sleeve, the lower end face of the transmission plate is a plane, the lower end face of the transmission plate is used as the abutting surface, the plane where the abutting surface is located is perpendicular to the central axis of the transmission rod, the abutting surface is a plane, and the plane where the abutting surface is located is parallel to the plane where the abutting surface is located.

4. A control valve according to claim 3, wherein the lower end face of the transmission rod is not lower than the abutment face in the axial direction of the sleeve, the upper end face of the transmission plate is a plane, and the upper end face of the transmission plate is not higher than the pilot valve opening in the axial direction of the sleeve.

5. The control valve of any of claims 1-4, wherein the main valve core member comprises a main valve core and a gasket, the main valve core comprising a guide portion and a piston portion, the guide portion being cylindrical, an outer peripheral wall of the guide portion being in clearance sliding engagement with an inner wall of the sleeve, the guide portion comprising the abutment mating surface and the pilot valve mouth, the piston portion being fixedly connected to the gasket, the gasket being capable of abutting the main valve mouth.

6. The control valve of any of claims 1-4, wherein the main valve core member comprises a guide member fixedly connected to the main valve core, a peripheral wall of the guide member in clearance sliding engagement with an inner wall of the sleeve, the guide member comprising the abutment mating surface and the pilot valve port portion, the main valve core being fixedly connected to the seal, and the seal being capable of abutting the main valve port portion.

7. The control valve of claim 6, wherein the main spool includes a body portion and an extension portion extending upward from the body portion in an axial direction of the sleeve, the body portion being fixedly connected to the gasket, an outer wall of the extension portion including an externally threaded portion, the guide member being hollow, an inner wall of the guide member including an internally threaded portion, the externally threaded portion being threadedly engaged with the internally threaded portion.

8. The control valve of claim 7, wherein the extension further comprises a groove below the externally threaded portion, the main valve core member further comprises a seal member partially located in the groove, the seal member elastically abutting between a groove wall of the groove and an inner wall of the guide member, the main valve spool comprises an annular groove, a lower end surface of the guide member contacts a groove bottom of the annular groove, the guide member comprises an inner top surface located above the internally threaded portion, and a distance is provided between the inner top surface and an upper end surface of the extension.

9. The control valve of any of claims 2-4, wherein the core assembly further comprises a head, a spring, a stem, and a pilot valve core, the second plunger being positioned below the first plunger, the second plunger comprising a mounting slot open to the inner wall of the sleeve, the drive stem portion being positioned in the mounting slot;

the second movable iron core further comprises an upper accommodating hole and a lower accommodating hole, the ejector rod part is located in the upper accommodating hole, the spring abuts against the ejector rod, the ejector rod abuts against the hole bottom of the upper accommodating hole, the pilot valve core is located in the lower accommodating hole at least partially, the pilot valve core is in tight fit with the hole wall of the lower accommodating hole, and the pilot valve core can abut against the pilot valve opening.