CN209781321U - Plug-in type reversing valve core - Google Patents
Plug-in type reversing valve core Download PDFInfo
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- CN209781321U CN209781321U CN201920013471.4U CN201920013471U CN209781321U CN 209781321 U CN209781321 U CN 209781321U CN 201920013471 U CN201920013471 U CN 201920013471U CN 209781321 U CN209781321 U CN 209781321U
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Abstract
The utility model provides a plug-in type reversing valve core, which comprises a thread component and a valve core component which is inserted in a thread component positioning groove and can rotate relative to the thread component; the valve core part comprises a valve core body, a sliding sleeve in the valve core body and a valve rod inserted into the valve core body; the tail end of the valve rod is inserted into the sliding sleeve; the inner wall of the valve core body is provided with a sealing gasket which forms a seal with the sliding sleeve, the inner wall of the valve core body is tightly attached to the sealing gasket and provided with a flow-limiting piece, and the sliding sleeve can freely pass through the inner cavity of the flow-limiting piece. The utility model discloses the switching-over case that creates and provides is the assembled structure, and the screw thread part links into an integrated entity through steel wire retaining ring and case part, but the relative rotation between the two. During the assembling and disassembling process, the valve core component is inserted or taken out through the screwing-in and screwing-out of the thread component, and the valve core component does not rotate. Effectively reducing the processing and assembling precision and completely avoiding the occlusion phenomenon of the valve core and the valve body in the dismounting process.
Description
Technical Field
The invention belongs to the technical field of hydraulic support reversing valve cores, and particularly relates to a plug-in type reversing valve core.
Background
The reversing valve group is a control and regulation device for realizing the action of a hydraulic support, and the currently used reversing valve group consists of a main valve body and a plurality of plug-in valve cores. However, the current reversing valve core has several problems in the installation, disassembly and use process. Mainly comprises the following steps: the valve body and the valve core in the prior art are both made of stainless steel, so that the risk of occlusion of inner and outer threads or surfaces exists in the process of installation or disassembly, and the valve body or the valve core can be scrapped after occlusion. In addition, when case during operation, if receive hydraulic shock, current structure can make the sealed opening of liquid return, and open the back and return the liquid sealed unable reclosing, and required pressure or flow can't be guaranteed to the direct inflow of working solution liquid return pipeline, makes the exploitation operation have the potential safety hazard, needs a lot of solution.
Disclosure of Invention
In view of the above, the present invention provides a cartridge type direction changing valve core to overcome the above-mentioned defects in the prior art.
in order to achieve the purpose, the technical scheme of the invention is realized as follows:
A plug-in type reversing valve core comprises a thread component and a valve core component which is inserted in a thread component positioning groove and can rotate relative to the thread component; the valve core part comprises a valve core body, a sliding sleeve in the valve core body and a valve rod inserted into the valve core body; the tail end of the valve rod is inserted into the sliding sleeve; the inner wall of the valve core body is provided with a sealing gasket which forms a seal with the sliding sleeve, the inner wall of the valve core body is tightly attached to the sealing gasket and provided with a flow-limiting piece, and the sliding sleeve can freely pass through the inner cavity of the flow-limiting piece.
Further, the thread part is connected with the valve core part through a steel wire check ring.
Furthermore, one side of the sliding sleeve facing the sealing gasket is provided with an inclined plane matching part, and an inclined plane sealing part is arranged on the sealing gasket in a matching manner.
Furthermore, the whole flow-limiting piece is of an annular structure, and the circumferential surface of the flow-limiting piece is fixed on the inner wall of the valve core body.
Furthermore, the end of the valve core part is provided with a matching section which is in sliding fit with the inner wall of the positioning groove.
Furthermore, the valve core body, the sliding sleeve and the valve rod are coaxially arranged.
Further, a first sealing element is arranged between the valve rod and the sliding sleeve.
Further, a second sealing element is arranged between the sliding sleeve and the inner wall of the valve core body.
compared with the prior art, the invention has the following advantages:
The reversing valve core provided by the invention is of an assembled structure, the thread part is connected with the valve core part into a whole through the steel wire retainer ring, and the two parts can rotate relatively. During the assembling and disassembling process, the valve core component is inserted or taken out through the screwing-in and screwing-out of the thread component, and the valve core component does not rotate. Effectively reducing the processing and assembling precision and completely avoiding the occlusion phenomenon of the valve core and the valve body in the dismounting process.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. In the drawings:
FIG. 1 is a schematic sectional view of the connection between the threaded member and the valve core member according to the present invention;
FIG. 2 is a partially sectional schematic structural view of the inventive valve core assembly;
Fig. 3 is a schematic structural diagram of the position limiting element.
Description of reference numerals:
1-a threaded component; 2-a spool part; 3-a valve core body; 4-a sliding sleeve; 5-valve stem; 6-a sealing gasket; 7-a flow restriction; 8-a retainer ring; 9-a bevel mating section; 10-bevel seal; 11-a fixed part; 12-a throttle; 13-a mating segment; 14-a first seal; 15-second seal.
Detailed Description
it should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
The invention will be described in detail with reference to the following examples.
A plug-in type reversing valve core is shown in figures 1 to 3 and comprises a thread component 1 and a valve core component 2 which is inserted in a thread component positioning groove and can rotate relative to the thread component; the valve core component comprises a valve core body 3, a sliding sleeve 4 in the valve core body and a valve rod 5 inserted into the valve core body; the tail end of the valve rod is inserted into the sliding sleeve; the inner wall of the valve core body is provided with a sealing gasket 6 which forms a seal with the sliding sleeve, the inner wall of the valve core body is tightly attached to the sealing gasket and provided with a flow limiting piece 7, and the sliding sleeve can freely pass through the inner cavity of the flow limiting piece.
The invention aims at the problems that the reversing valve core in the prior art is of an integral plug-in type structure, and the valve core parts are assembled into a whole. If the whole coaxiality of the assembled valve core is not good, and the inherent adhesive property of stainless steel, the valve core has the defects of occlusion and the like in the assembling and disassembling process, and the pertinence is improved. The split structure of the valve core component and the thread component is adopted, after the valve core component and the thread component are assembled, the thread component and the valve core component are integrated and can rotate relatively, and the improvement can completely avoid the occurrence of the occlusion phenomenon under the economic condition. Instead of the conventional method, the method starts from the directions of increasing the part processing and assembling precision, changing the material, processing by special processes and the like, and solves the problem of occlusion, so that the cost is increased.
The valve core component and the thread component are designed in an assembly mode, the machining difficulty of the reversing valve core can be effectively reduced, even the valve core component only needs to be subjected to finish machining, the machining cost is reduced, and meanwhile, the precision requirement during assembly can be correspondingly reduced.
Preferably, the threaded part is connected with the spool part through a wire retainer ring 8. The recess is arranged on the inner wall of the positioning groove, the end of the valve element component is provided with a clamping groove corresponding to the recess, the steel wire is blocked in the clamping groove and clamped with the recess of the positioning groove, the structural design realizes that the valve element component and the thread component can rotate relatively, and meanwhile, under the action of the steel wire retaining ring (and the matching relation between the end of the valve element component and the positioning groove), the valve element component and the thread component can not have other degrees of freedom.
Preferably, the sliding sleeve is provided with an inclined plane matching part 9 towards one side of the sealing gasket, an inclined plane sealing part 10 is arranged on the sealing gasket in a matching manner, and the sliding sleeve and the sealing gasket can be reliably combined to realize sealing.
Preferably, the whole flow-limiting piece is of an annular structure, and the circumferential surface of the flow-limiting piece is fixed on the inner wall of the valve core body. Typically, the restriction is arranged on the side of the gasket adjacent to the threaded element. In an alternative embodiment, the flow-limiting member is L-shaped in cross-section and comprises a vertical fixing portion 11 and a lower horizontal throttling portion 12, the fixing portion and the gasket are pressed in the groove of the valve core body at the same time, and the throttling portion extends towards one side of the threaded member. The clearance between the inner wall of the flow restriction and the sliding sleeve is small, usually about 0.1-0.5 mm.
through the structural design of the flow-limiting piece, the phenomenon of insufficient pressure or flow caused by liquid inlet and return communication can be effectively prevented, and the safety of the product in use is improved. It should be noted that the flow restriction element is not limited to the annular structure, and may also take other structural forms, as long as the corresponding throttling function is achieved, and other structural alternatives can be generally regarded as equivalent alternatives, and also shall fall within the protection scope of the present invention.
Preferably, the end of the valve core component is provided with a matching section 13, and the matching section is in sliding fit with the inner wall of the positioning groove, so that the coaxiality of the matching section and the inner wall of the positioning groove is ensured to meet the performance requirement. Preferably, the valve core body, the sliding sleeve and the valve rod are coaxially arranged.
Typically, a first seal 14 is provided between the valve stem and the sliding sleeve. And a second sealing element 15 is arranged between the sliding sleeve and the inner wall of the valve core body.
It should be noted that, in the reversing valve core of the prior art, when the reversing valve core is in a non-working state, the valve rod is in contact with the sealing gasket to isolate high-pressure liquid inlet, the sliding sleeve is separated from the sealing gasket, and the returned liquid is communicated with the working cavity; when the valve is in a working state, the sliding sleeve is in contact with the sealing gasket and sealed, then the return liquid is separated from the working cavity, the valve rod is separated from the sealing gasket, and at the moment, the inlet liquid is communicated with the working cavity. If receive hydraulic shock, because hydraulic shock's effect, the sliding sleeve separates with sealed the pad, and the feed liquor directly switches on with the liquid that returns after the separation, and the control pressure of sliding sleeve is little to make sliding sleeve and sealed pad sealed once more, can't guarantee required pressure or flow under this kind of condition, has great potential safety hazard.
In the invention, the liquid inlet and the liquid return can not be completely communicated by adding the flow limiting structure, and the system pressure is ensured by resealing under the action of control force even after the liquid return is opened. Specifically, the sliding sleeve is in contact with the sealing gasket and then seals the sealing gasket, the return liquid is separated from the working cavity, the valve rod is separated from the sealing gasket, and the inlet liquid is communicated with the working cavity at the moment. When receiving great hydraulic shock, even the impact makes sliding sleeve and sealed the separation of filling up, because the existence of current-limiting piece, sliding sleeve and current-limiting piece clearance are very little, and at this moment under the slit throttle effect, the feed liquor can not direct a large amount of inflow return liquids, and the control force of sliding sleeve is bigger than separation liquid pressure under this kind of circumstances, and the sliding sleeve can be sealed with sealed the contact of filling up again, guarantees safety, the stability of system.
The reversing valve core provided by the invention is of an assembled structure, the thread part is connected with the valve core part into a whole through the steel wire retainer ring, and the two parts can rotate relatively. During the assembling and disassembling process, the valve core component is inserted or taken out through the screwing-in and screwing-out of the thread component, and the valve core component does not rotate. Effectively reducing the processing and assembling precision and completely avoiding the occlusion phenomenon of the valve core and the valve body in the dismounting process.
the above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.
Claims (8)
1. The utility model provides a cartridge formula switching-over case which characterized in that: the valve core component is inserted into the positioning groove of the thread component and can rotate relative to the thread component; the valve core part comprises a valve core body, a sliding sleeve in the valve core body and a valve rod inserted into the valve core body; the tail end of the valve rod is inserted into the sliding sleeve; the inner wall of the valve core body is provided with a sealing gasket which forms a seal with the sliding sleeve, the inner wall of the valve core body is tightly attached to the sealing gasket and provided with a flow-limiting piece, and the sliding sleeve can freely pass through the inner cavity of the flow-limiting piece.
2. The cartridge-type diverter valve cartridge according to claim 1, wherein: the thread component is connected with the valve core component through a steel wire check ring.
3. The cartridge-type diverter valve cartridge according to claim 1, wherein: one side of the sliding sleeve facing the sealing gasket is provided with an inclined plane matching part, and an inclined plane sealing part is arranged on the sealing gasket in a matching manner.
4. The cartridge-type diverter valve cartridge according to claim 1, wherein: the whole flow-limiting piece is of an annular structure, and the circumferential surface of the flow-limiting piece is fixed on the inner wall of the valve core body.
5. The cartridge-type diverter valve cartridge according to claim 1, wherein: the end of the valve element part is provided with a matching section which is in sliding fit with the inner wall of the positioning groove.
6. The cartridge-type diverter valve cartridge according to claim 1, wherein: the valve core body, the sliding sleeve and the valve rod are coaxially arranged.
7. The cartridge-type diverter valve cartridge according to any one of claims 1 to 6, wherein: a first sealing element is arranged between the valve rod and the sliding sleeve.
8. The cartridge-type diverter valve cartridge according to any one of claims 1 to 6, wherein: and a second sealing element is arranged between the sliding sleeve and the inner wall of the valve core body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920013471.4U CN209781321U (en) | 2019-01-04 | 2019-01-04 | Plug-in type reversing valve core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920013471.4U CN209781321U (en) | 2019-01-04 | 2019-01-04 | Plug-in type reversing valve core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209781321U true CN209781321U (en) | 2019-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920013471.4U Active CN209781321U (en) | 2019-01-04 | 2019-01-04 | Plug-in type reversing valve core |
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| Country | Link |
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| CN (1) | CN209781321U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538567A (en) * | 2019-01-04 | 2019-03-29 | 天津华宁电子有限公司 | A kind of insert type change-over valve core |
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2019
- 2019-01-04 CN CN201920013471.4U patent/CN209781321U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538567A (en) * | 2019-01-04 | 2019-03-29 | 天津华宁电子有限公司 | A kind of insert type change-over valve core |
| CN109538567B (en) * | 2019-01-04 | 2024-04-05 | 天津华宁电子有限公司 | Plug-in type reversing valve core |
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