CN212202679U

CN212202679U - Flow control friction-reducing long cone valve structure for multi-way valve

Info

Publication number: CN212202679U
Application number: CN202020601837.2U
Authority: CN
Inventors: 何伟; 胡建军; 戚振红; 赵鑫拓; 张正兴
Original assignee: Xuzhou XCMG Hydraulics Co Ltd
Current assignee: Xuzhou XCMG Hydraulics Co Ltd
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2020-12-22
Anticipated expiration: 2030-04-21

Abstract

The utility model discloses a flow control reduces frictional long cone valve structure for multi-way valve belongs to hydrovalve technical field. Comprises a valve body and a valve core which is arranged in a valve core hole of the valve body in a sliding way; the cylindrical surface of the valve core is provided with a circumferential pressure equalizing groove and a throttling groove which is axially arranged, and the throttling groove is closer to the inner end of the valve core than the pressure equalizing groove. The axial throttling groove and the pressure equalizing groove are uniformly distributed on the outer wall of the valve core of the utility model, so that the direct contact area between the valve core and the valve core hole is reduced, the friction force is reduced, the valve core moves more quickly and smoothly, and the clamping stagnation phenomenon possibly occurring in the valve core moving process is effectively reduced; the throttling grooves are communicated with the pressure equalizing grooves, and oil liquid quickly enters the pressure equalizing grooves through the uniformly distributed throttling grooves, so that the lateral hydraulic clamping force is reduced, and the clamping phenomenon generated when the valve core moves is effectively avoided; the influence of hydrodynamic force on the valve core under high pressure and large flow is avoided, and the guiding performance and the response speed of the conical valve core are improved.

Description

Flow control friction-reducing long cone valve structure for multi-way valve

Technical Field

The utility model relates to a hydrovalve technical field specifically is a long cone valve structure of flow control reduction friction for multi-way valve.

Background

High pressure and high flow rate are development trends of hydraulic systems and hydraulic parts; however, the hydraulic force generated by the high-pressure and large-flow liquid flow can generate adverse factors on the position of the valve core in the valve core hole and the stability of the state of the valve core; the position and state of the valve core in the valve core hole are unstable due to the influence of high pressure and large flow hydraulic power, so that the valve core is stuck when moving in the valve core hole, and the guide performance and the response degree of the valve core are influenced.

The prior patent discloses a throttling one-way valve (CN 207961113U), belonging to the technical field of valves. The valve comprises a valve body through which liquid flows, wherein an inner cavity is formed in the valve body, an end cover is sealed at one end of the inner cavity to form a sealed end, an overflowing hole is formed in the end cover, a valve plate which is extruded by the liquid to move is arranged at the open end of the valve body, and the valve plate and the open end of the valve body are sealed; the inner wall of the valve core is provided with a throttling groove, the throttling groove is matched with the valve plate to form a liquid circulation channel, the circulation area of the circulation channel is sequentially reduced along the direction that the valve plate is moved by hydraulic pressure, and an elastic part is further arranged in the inner cavity. In the throttling one-way valve, the throttling groove and the valve plate are matched to form a liquid flow channel, and the valve plate adjusts the size of the flow channel according to the size of hydraulic pressure, so that the opening of the valve is adjusted.

The prior art has the following defects:

1, in a high-pressure and high-flow hydraulic multi-way valve, the valve core of the structure has high clamping risk and has limitation in use;

2, the valve has complex structure, various auxiliary parts and low operability.

Disclosure of Invention

In order to solve the technical problem, the utility model provides a flow control reduces frictional long cone valve structure for multi-way valve.

The utility model discloses a following technical scheme realizes: a long cone valve structure for flow control and friction reduction of a multi-way valve comprises a valve body and a valve core which is slidably arranged in a valve core hole of the valve body; the cylindrical surface of the valve core is provided with a circumferential pressure equalizing groove and a throttling groove which is axially arranged, and the throttling groove is closer to the inner end of the valve core than the pressure equalizing groove.

It further comprises the following steps: the pressure equalizing grooves are multiple in number and are uniformly distributed along the axial direction of the valve core.

The throttling grooves are multiple in number and are uniformly distributed around the axis of the valve core.

The end part of the throttling groove is communicated with the pressure equalizing groove; the cross sections of the throttling groove and the pressure equalizing groove are rectangular.

The outer end of the valve core hole of the valve body is provided with a plug screw through threaded connection, and a spring is arranged between the valve core and the plug screw; and an oil drainage hole penetrating through the valve core is formed in the axis of the valve core, and an oil drainage throttling hole is formed in the inner end of the oil drainage hole.

A conical surface sealing structure is adopted between the inner end of the valve core and the valve core hole of the valve body, and the inner end of the valve core is provided with an arc-shaped surface.

Compared with the prior art, the beneficial effects of the utility model are that:

1, axial throttling grooves and pressure equalizing grooves are uniformly formed in the outer wall of the valve core, so that the direct contact area between the valve core and a valve core hole is reduced, the friction force is reduced, the valve core moves more quickly and smoothly, and the clamping stagnation phenomenon possibly occurring in the movement process of the valve core is effectively reduced;

2, the throttling grooves are communicated with the pressure equalizing grooves, and oil liquid quickly enters the pressure equalizing grooves through the uniformly distributed throttling grooves, so that the lateral hydraulic clamping force is reduced, and the clamping phenomenon during the movement of the valve core is effectively avoided; the influence of hydrodynamic force on the valve core under high pressure and large flow is avoided, and the guiding performance and the response speed of the conical valve core are improved.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged view of the valve core structure of FIG. 1;

fig. 3 is a schematic view of a valve core structure according to a first embodiment of the present invention;

in the figure: 1. a valve body; 2. a valve core; 21. a pressure equalizing groove; 22. an oil drainage hole; 23. a throttling groove; 24. a drain orifice; 3. a spring; 4. and (4) a screw plug.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example one

As shown in fig. 1 and 2, a flow control friction reducing long cone valve structure for a multi-way valve comprises a valve body 1 and a valve core 2 which is slidably mounted in a valve core hole of the valve body 1. The outer end of the valve core hole of the valve body 1 is provided with a plug screw 4 through thread connection, and a spring 3 is arranged between the valve core 2 and the plug screw 4; the axial center of the valve core 2 is provided with a drain hole 22 penetrating through the valve core 2, and the inner end of the drain hole 22 is provided with a drain throttling hole 24. A conical surface sealing structure is adopted between the inner end of the valve core 2 and the valve core hole of the valve body 1, and the inner end of the valve core 2 is provided with an arc surface.

The cylindrical surface of the valve core 2 is provided with a plurality of uniformly distributed circumferential pressure equalizing grooves 21 and a plurality of uniformly distributed axially arranged throttling grooves 23, and the throttling grooves 23 are closer to the inner end of the valve core 2 than the pressure equalizing grooves 21. The end part of the throttling groove 23 is communicated with the pressure equalizing groove 21; the throttle groove 23 and the pressure equalizing groove 21 are preferably rectangular in cross section.

In the embodiment, the valve core 2, the valve core hole on the valve body 1, the spring 3 and the screw plug 4 are matched to control the on-off of liquid, P, T is a liquid circulation channel, when the pressure of a port P is less than the spring force, the valve core is closed, and no oil liquid flows through a port P, T; when the pressure of the port P is larger than or equal to the spring force, the valve core is opened, and P, T oil flows.

In the present embodiment, the first and second electrodes are,

the throttle groove 23 of equipartition has been processed to 2 outer walls of case, and when fluid acted on the case cross-section, fluid was full in the axial throttle groove of equipartition for the case is stably opened, reduces the flow and strikes, and the case motion is more stable. Secondly, on the premise of not changing the guide length of the valve core required by design, axial throttling grooves are uniformly formed in the outer wall of the valve core in a processing mode, so that the direct contact area between the valve core and a valve core hole is reduced, the friction force is reduced, the valve core moves more quickly and smoothly, and the clamping stagnation phenomenon possibly occurring in the movement process of the valve core is effectively reduced. Meanwhile, the response speed and the opening stability of the cone valve core are improved.

In addition, the outer wall of the valve core 2 is also provided with pressure equalizing grooves which are uniformly distributed in the axial direction, the pressure equalizing grooves are communicated with the throttling grooves, oil rapidly enters the pressure equalizing grooves through the uniformly distributed throttling grooves, the lateral hydraulic clamping force is reduced, and the clamping phenomenon which occurs when the valve core moves is effectively avoided.

Example two

Referring to fig. 3, the difference between the second embodiment and the first embodiment is: when the valve core is used as a one-way throttle valve, the valve core structure shown in figure 3 is adopted, the uniformly distributed rectangular throttling grooves have the characteristic of good linearity, and a liquid throttling channel is formed when the flow passes through the uniformly distributed throttling grooves to regulate the flow, play the roles of throttling speed regulation and buffering, ensure that the micro-opening of the valve core is slowly and stably opened, regulate the flow and reduce the flow impact. According to different working condition requirements, different types and different quantities of throttling grooves 23 can be adopted to realize different flow regulation effects.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A long cone valve structure for flow control and friction reduction of a multi-way valve comprises a valve body (1) and a valve core (2) which is slidably installed in a valve core hole of the valve body (1); the method is characterized in that: the cylindrical surface of the valve core (2) is provided with a circumferential pressure equalizing groove (21) and a throttling groove (23) which is axially arranged, and the throttling groove (23) is closer to the inner end of the valve core (2) than the pressure equalizing groove (21).

2. A flow control friction reducing long cone valve structure for a multi-way valve according to claim 1 wherein: the pressure equalizing grooves (21) are multiple in number, and the pressure equalizing grooves (21) are evenly distributed along the axial direction of the valve core (2).

3. A flow control friction reducing long cone valve structure for a multi-way valve according to claim 1 wherein: the throttling grooves (23) are multiple in number, and the throttling grooves (23) are uniformly distributed around the axis of the valve core (2).

4. A flow control friction reducing long cone valve structure for a multi-way valve according to claim 1 wherein: the end part of the throttling groove (23) is communicated with the pressure equalizing groove (21); the cross sections of the throttling groove (23) and the pressure equalizing groove (21) are rectangular.

5. A flow control friction reducing long cone valve structure for a multi-way valve according to claim 1 wherein: the outer end of the valve core hole of the valve body (1) is provided with a plug screw (4) through threaded connection, and a spring (3) is arranged between the valve core (2) and the plug screw (4); the axial center of the valve core (2) is provided with an oil drainage hole (22) penetrating through the valve core (2), and the inner end of the oil drainage hole (22) is provided with an oil drainage throttling hole (24).

6. A flow control friction reducing long cone valve structure for a multi-way valve according to claim 1 wherein: a conical surface sealing structure is adopted between the inner end of the valve core (2) and the valve core hole of the valve body (1), and the inner end of the valve core (2) is provided with an arc-shaped surface.