CN218407982U - Externally-mounted speed limiting valve - Google Patents
Externally-mounted speed limiting valve Download PDFInfo
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- CN218407982U CN218407982U CN202222611979.9U CN202222611979U CN218407982U CN 218407982 U CN218407982 U CN 218407982U CN 202222611979 U CN202222611979 U CN 202222611979U CN 218407982 U CN218407982 U CN 218407982U
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Abstract
The invention provides an externally-mounted speed-limiting valve, which comprises a valve body, wherein one end of the valve body is provided with a connector, and the other end of the valve body is open; the connector and the valve body are integrally formed; a valve core assembly is arranged in the valve body, an adapter is arranged at the open end of the valve body, and a sealing ring is arranged between the adapter and the valve body; the valve core assembly comprises a valve sleeve and a valve core arranged in the valve sleeve in a sliding mode, an internal thread connecting section is arranged at the open end of the valve body, the internal connecting end of the adapter and the connecting portion of the valve sleeve are in threaded connection with the internal thread connecting section, and the internal connecting end of the adapter is identical to the connecting portion of the valve sleeve in thread structure. The speed limiting valve is reasonable in structural design, one end of the spring is arranged in the positioning groove, the other end of the spring abuts against the positioning table, stable elastic acting force is applied to the valve core, force application is balanced when the valve core acts, the valve core slides smoothly in the valve sleeve, clamping stagnation cannot occur, and the speed limiting valve is guaranteed to have good reliability.
Description
Technical Field
The invention belongs to the technical field of valves, and particularly relates to an externally-mounted speed limiting valve.
Background
The speed limiting valve is a common valve in a hydraulic control system, is widely applied to the lifting and descending of a fork of a forklift, and mainly comprises a cylindrical valve body with a control valve core, a valve core spring, a valve sleeve and a movable valve core in the valve sleeve. The valve member is brought into its operating position by the fluid flowing through it, and the throttling resistance, which is related to the pre-pressure of the valve member spring, determines the regulated flow value. When the flow is in the reverse direction, the valve core returns completely from the adjusting position, the flow passing through the speed limiting valve is irrelevant to the adjusting range of the valve core, and only the medium is discharged from the flow limiting hole to play a role similar to a one-way valve. In the prior art, as a novel speed-limiting valve disclosed in CN202110009433.3, the structure is comparatively complicated, the processing degree of difficulty is big, and the processing cost is also higher, and its case part is arranged between upper and lower valve body, and the equal threaded connection case part of upper valve body and lower valve body, assembly operation is inconvenient, especially still need adopt laser to carry out welding operation between upper and lower valve body, and the operation requirement is high, and the cost is paid out greatly, still causes the damage to the sealing washer easily in welding process, and even sealed inefficacy leads to the valve body to leak. Therefore, there is a need for an improvement of the existing speed limit valve structure.
Disclosure of Invention
In view of the above, the present invention provides an externally-mounted speed-limiting valve to overcome the defects in the prior art.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an externally-mounted speed-limiting valve comprises a valve body, wherein one end of the valve body is provided with a connector, and the other end of the valve body is open; the connector and the valve body are integrally formed; a valve core assembly is arranged in the valve body, an adapter is arranged at the open end of the valve body, and a sealing ring is arranged between the adapter and the valve body;
the valve core assembly comprises a valve sleeve and a valve core arranged in the valve sleeve in a sliding manner, an internal thread connecting section is arranged at the open end of the valve body, the internal connecting end of the adapter and the connecting part of the valve sleeve are in threaded connection with the internal thread connecting section, and the internal connecting end of the adapter and the connecting part of the valve sleeve have the same thread structure;
one end of the valve sleeve is closed, and the other end of the valve sleeve is provided with a liquid inlet; the valve core is of a cylindrical structure, one end of the valve core is provided with a back cover, and the back cover is provided with a flow limiting hole; a plurality of liquid passing holes are formed in the side wall of the valve sleeve;
the valve core and the valve sleeve are supported by a spring, and the valve core is limited by a limiting piece at the liquid inlet end of the valve sleeve so as to prevent the valve core from being separated from the valve sleeve.
Furthermore, a positioning table is arranged on the inner wall of the valve core, a positioning groove is arranged on the valve sleeve, one end of the spring is arranged in the positioning groove, and the other end of the spring abuts against the positioning table.
Further, the valve sleeve comprises a main body structure, one end of the main body structure, which is close to the liquid inlet, is provided with a connecting part, the outer surface of the connecting part is provided with a valve core external thread connecting structure, and the valve core external thread connecting structure and an external thread structure of the connecting end in the adapter adopt thread structures with the same specification.
Furthermore, the limiting part adopts an elastic check ring for the hole, and a check ring mounting groove is arranged on the inner wall of the open end of the valve sleeve.
Furthermore, lag is all installed on the outer link of adapter and the connector of valve body.
Furthermore, one side of the valve sleeve, which is different from the liquid inlet, is provided with a conical end.
Furthermore, the sealing ring adopts a nitrile butadiene rubber O-shaped ring.
Compared with the prior art, the invention has the following advantages:
the speed limiting valve is reasonable in structural design, one end of the spring is arranged in the positioning groove, the other end of the spring abuts against the positioning table, stable elastic acting force is applied to the valve core, force application is balanced when the valve core acts, the valve core slides smoothly in the valve sleeve, clamping stagnation cannot occur, and the speed limiting valve is guaranteed to have good reliability.
Meanwhile, the inner connecting end and the outer connecting end of the adapter can be different in thread size, and the universality of the speed limiting valve is effectively improved.
In addition, the connecting part arranged on the valve sleeve of the speed-limiting valve and the inner connecting end on the adapter have the thread structures with the same specification, the valve body can be conveniently installed, welding operation is not needed in the assembling process, the speed-limiting valve is easy to operate, the sealing ring cannot be damaged, the integral sealing performance of the speed-limiting valve is guaranteed, leakage is not prone to occurring, and the rate of finished products is high.
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 structural diagram of the present invention;
FIG. 2 is a schematic view of a valve spool assembly in the creation of the present invention;
fig. 3 is a schematic view of the valve sleeve of the present invention;
FIG. 4 is a schematic view of the valve cartridge in the invention;
FIG. 5 is a schematic view of a transfer joint according to the present invention;
fig. 6 is a schematic view of the valve body in the invention.
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 embodiments with reference to the attached drawings.
An externally-mounted speed-limiting valve is shown in figures 1 to 6 and comprises a valve body 1, wherein one end of the valve body is provided with a connector 2, the other end of the valve body is open, the connector is provided with an external thread structure and can be directly connected with a connector or a pipeline connector at an oil outlet of an oil cylinder; the connector and the valve body are integrally formed, the integrity is good, the connecting structure between the connector and the valve body is simplified, and no leakage hidden trouble exists. A valve core assembly 3 is arranged in the valve body, an adapter 4 is arranged at the open end of the valve body, and a sealing ring 5 is arranged between the adapter and the valve body; typically, the seal ring is a nitrile rubber O-ring. To protect the threaded portion of the fitting, a boot 22 is typically mounted on the outer connection end 24 of the adapter and the connection to the valve body. Adapter demountable installation in the valve body, its outer connecting end can be different specifications or structural style, according to the connection needs of difference, chooses the adapter of suitable specification for use, and the limitation is little, and the commonality is good.
The valve core component comprises a valve sleeve 6 and a valve core 7 which is arranged in the valve sleeve in a sliding mode, an internal thread connecting section 8 is arranged at the open end of the valve body, and a conical end 23 is arranged on one side, different from the liquid inlet, of the valve sleeve, so that the valve sleeve can be favorably and smoothly installed in the valve body.
The equal threaded connection in the female connection section of in-connection end 9 of adapter and the connecting portion 10 of valve barrel, and the in-connection end of adapter is the same with the connecting portion helicitic texture of valve barrel, the installation of female connection section one shot forming, can be used for valve barrel and adapter simultaneously, such structural design has simplified the processing degree of difficulty of parts such as valve body, valve barrel, during the equipment, follow female connection section screw in case subassembly (valve barrel) earlier, later with the in-connection end of adapter twist soon in the female connection section can, assembly operation is more convenient and fast.
One end of the valve sleeve is closed, and the other end of the valve sleeve is provided with a liquid inlet 11; the valve core is of a cylindrical structure, one end of the valve core is provided with a back cover 12, and the back cover is provided with a flow limiting hole 13; a plurality of liquid passing holes 14 are formed in the side wall of the valve sleeve; the valve core and the valve sleeve are supported by a spring 15, and the limiting piece 16 at the liquid inlet end of the valve sleeve is used for limiting the valve core so as to prevent the valve core from being separated from the valve sleeve. For example, the limiting member is a circlip for the hole, and a circlip installation groove is formed in the inner wall of the open end of the valve sleeve.
The inner wall of the valve core is provided with a positioning platform 17, the valve sleeve is provided with a positioning groove 18, one end of the spring is arranged in the positioning groove, the other end of the spring is propped against the positioning platform, the stability of the spring is good, and the valve core moves smoothly. In an optional embodiment, in order to reduce the processing difficulty of the valve element and further improve the stability of the movement of the valve element, two ring grooves 21 are formed in the outer wall of the valve element, guide belts are installed in the ring grooves, and the outer surface of the valve element does not need to be processed with high precision any more by utilizing the sliding fit of the guide belts and the inner wall of the cavity of the valve sleeve, so that the processing difficulty of the outer surface of the valve element is reduced, and the situation that the valve element is clamped in the valve sleeve due to impurities between the valve element and the valve sleeve can be effectively avoided. When the valve core is used for a long time, the valve core is not easy to wear, only the worn guide belt needs to be replaced, and the use cost is low.
The valve sleeve comprises a main structure 19, one end of the main structure, which is close to the liquid inlet, is provided with a connecting part, the outer surface of the connecting part is provided with a valve core external thread connecting structure 20, the valve core external thread connecting structure and an external thread structure of the connecting end in the adapter adopt thread structures with the same specification, and can be directly connected with an internal thread connecting section of the valve body.
The working principle of the speed limiting valve is as follows:
when hydraulic oil flows in the forward direction (oil enters the inner cavity of the valve body from one side of the connector), the oil can enter the inner cavity of the valve sleeve from the liquid inlet of the valve sleeve, and then the oil is discharged along the flow limiting hole at the bottom sealing position of the valve core; when hydraulic oil flows reversely (oil enters the inner cavity of the valve body from the open side of the valve body), the hydraulic oil pushes the valve core to overcome the elastic action force of the spring to move, so that the opening degree of the liquid inlet of the valve sleeve is reduced, a flow limiting effect is achieved, when the reverse pressure is large, the liquid inlet is completely sealed by the valve core, the hydraulic oil is prevented from flowing out, and the effect similar to a safety valve can be achieved.
The speed limiting valve is reasonable in structural design, one end of the spring is arranged in the positioning groove, the other end of the spring abuts against the positioning table to apply stable elastic acting force to the valve core, the force application is balanced when the valve core acts, the valve core slides smoothly in the valve sleeve, no clamping stagnation occurs, and the speed limiting valve is guaranteed to have good reliability. Meanwhile, the inner connecting end and the outer connecting end of the adapter can be different in thread size, and the universality of the speed limiting valve is effectively improved. In addition, the connecting part arranged on the valve sleeve of the speed-limiting valve and the inner connecting end on the adapter have the same specification thread structures, the valve body can be conveniently installed, welding operation is not needed in the assembling process, the speed-limiting valve is easy to operate, the sealing ring cannot be damaged, the integral sealing performance of the speed-limiting valve is guaranteed, leakage is not prone to occurring, and the rate of finished products is high.
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 (7)
1. An externally-mounted speed-limiting valve is characterized in that: comprises a valve body, wherein one end of the valve body is provided with a connector, and the other end of the valve body is open; the connector and the valve body are integrally formed; the valve body is internally provided with a valve core assembly, the open end of the valve body is provided with an adapter, and a sealing ring is arranged between the adapter and the valve body;
the valve core assembly comprises a valve sleeve and a valve core arranged in the valve sleeve in a sliding manner, an internal thread connecting section is arranged at the open end of the valve body, the internal connecting end of the adapter and the connecting part of the valve sleeve are in threaded connection with the internal thread connecting section, and the internal connecting end of the adapter and the connecting part of the valve sleeve have the same threaded structure;
one end of the valve sleeve is closed, and the other end of the valve sleeve is provided with a liquid inlet; the valve core is of a cylindrical structure, one end of the valve core is provided with a back cover, and the back cover is provided with a flow limiting hole; a plurality of liquid passing holes are formed in the side wall of the valve sleeve;
the valve core and the valve sleeve are supported by a spring, and the limiting piece at the liquid inlet end of the valve sleeve is utilized to limit the valve core so as to prevent the valve core from being separated from the valve sleeve.
2. An externally-mounted speed limit valve according to claim 1, wherein: the inner wall of the valve core is provided with a positioning table, the valve sleeve is provided with a positioning groove, one end of the spring is arranged in the positioning groove, and the other end of the spring props against the positioning table.
3. An externally-mounted speed limit valve according to claim 1, wherein: the valve sleeve comprises a main structure, one end of the main structure, which is close to the liquid inlet, is provided with a connecting part, the outer surface of the connecting part is provided with a valve core external thread connecting structure, and the valve core external thread connecting structure and an external thread structure of the connecting end in the adapter adopt thread structures with the same specification.
4. An externally-mounted speed limit valve according to claim 1, wherein: the limiting part is an elastic retainer ring for the hole, and a retainer ring mounting groove is formed in the inner wall of the open end of the valve sleeve.
5. An externally-mounted speed limit valve according to claim 1, wherein: and protective sleeves are respectively arranged on the outer connecting end of the adapter and the connecting end of the valve body.
6. An externally-mounted speed limit valve according to claim 1, wherein: one side of the valve sleeve, which is different from the liquid inlet, is provided with a conical end.
7. An externally-mounted speed limit valve according to claim 1, wherein: the sealing ring is a nitrile rubber O-shaped ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222611979.9U CN218407982U (en) | 2022-09-30 | 2022-09-30 | Externally-mounted speed limiting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222611979.9U CN218407982U (en) | 2022-09-30 | 2022-09-30 | Externally-mounted speed limiting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218407982U true CN218407982U (en) | 2023-01-31 |
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ID=84998873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222611979.9U Active CN218407982U (en) | 2022-09-30 | 2022-09-30 | Externally-mounted speed limiting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218407982U (en) |
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2022
- 2022-09-30 CN CN202222611979.9U patent/CN218407982U/en active Active
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