Large-flow pilot control structure

Abstract

The utility model relates to the technical field of flow valve control, in particular to a large-flow pilot control structure which comprises a valve body, a guide structure is arranged in the valve body, a valve element cover is installed on the left side of the valve body, a plug is installed on the right side of the valve body, and an O-shaped ring is installed in the valve body and located at the position of the valve element cover. The guide structure comprises a valve element installed in the valve body, a reset spring is fixedly connected to the position, on the left side of the valve element, in the valve body, a damper is arranged on the position, on the right side of the reset spring, in the valve body, and the valve element is stabilized by designing the large-flow pilot control structure and additionally arranging the guide structure in the structure. The multi-way valve solves the problems of large volume, large energy loss and inconvenience in use in a direct discharge scheme (namely a scheme that oil at a working port is directly discharged to an oil return channel) in an existing multi-way valve.

Description

Technical Field

[0001] The utility model relates to the technical field of flow valve control, in particular to a large flow pilot control structure. Background Art

[0002] At present, in multi-way valves, the principle of direct unloading or direct overflow of a single working oil port is generally adopted, that is, the oil leading to the working port is directly discharged to the return oil channel. The existing direct discharge solution is large in size, has a large energy loss, and is inconvenient to use.

[0003] Therefore, a large flow pilot control structure is needed to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to provide a large flow pilot control structure to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A large flow pilot control structure, comprising a valve body, a guide mechanism is arranged inside the valve body, a valve core cover is installed on the left side of the valve body, a plug is installed on the right side of the valve body, and an O-ring is installed inside the valve body and at the position of the valve core cover;

[0007] The guide mechanism includes a valve core installed inside the valve body, a return spring is fixedly connected to the left side of the valve core and inside the valve body, a damper is arranged inside the valve body and on the right side of the return spring, a spring chamber is opened inside the valve core and at a position corresponding to the return spring, an oil return chamber is opened inside the valve body and at a position corresponding to the valve core, and a high-pressure oil inlet chamber is opened inside the valve body and on the right side of the oil return chamber.

[0008] As a preferred solution of the utility model, the valve body, the valve core cover and the plug are all made of metal, and the O-ring is made of rubber.

[0009] As a preferred solution of the utility model, the valve core cover and the plug are connected to the valve body by bolts, and the plug penetrates and extends out of the valve body.

[0010] As a preferred solution of the utility model, the valve core is a reversing valve core, and the connection between the return spring and the valve core cover is a fixed connection.

[0011] As a preferred solution of the utility model, the oil return chamber is designed as an L-shaped structure, and the connection between the valve core and the valve body is a sliding connection.

[0012] As a preferred solution of the utility model, the valve core passes through the oil return chamber and extends into the high-pressure oil inlet chamber, and the outer wall of the valve core is sprayed with anti-corrosion paint.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] When the cam is in the state of being in a ... BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front cross-sectional view of the utility model;

[0016] Figure 2 For this utility model Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 This is a structural diagram of the existing solution before the improvement of the utility model.

[0018] In the figure: 1. valve body; 2. guide mechanism; 3. valve core cover; 4. plug; 5. O-ring; 201. valve core; 202. return spring; 203. damping; 204. spring chamber; 205. oil return chamber; 206. high-pressure oil inlet chamber. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be a central element. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0023] For examples, see Figure 1-3 , the utility model provides a technical solution:

[0024] A large flow pilot control structure comprises a valve body 1, a guide mechanism 2 is arranged inside the valve body 1, a valve core cover 3 is installed on the left side of the valve body 1, a plug 4 is installed on the right side of the valve body 1, and an O-ring 5 is installed inside the valve body 1 and at the position of the valve core cover 3;

[0025] The valve body 1, valve core cover 3 and plug 4 are all made of metal, the O-ring 5 is made of rubber, the valve core cover 3 and plug 4 are connected to the valve body 1 by bolts, and the plug 4 penetrates and extends to the outside of the valve body 1;

[0026] In this embodiment, reference Figure 1 and Figure 3 The guide mechanism 2 includes a valve core 201 installed inside the valve body 1, a return spring 202 is fixedly connected to the left side of the valve core 201 and inside the valve body 1, a damper 203 is arranged inside the valve body 1 and on the right side of the return spring 202, a spring chamber 204 is opened inside the valve core 201 and at a position corresponding to the return spring 202, an oil return chamber 205 is opened inside the valve body 1 and at a position corresponding to the valve core 201, and a high-pressure oil inlet chamber 206 is opened inside the valve body 1 and on the right side of the oil return chamber 205;

[0027] The valve core 201 is a reversing valve core, the reset spring 202 is connected to the valve core cover 3 in a fixed connection, the oil return chamber 205 is an L-shaped structure, the valve core 201 is connected to the valve body 1 in a sliding connection, the valve core 201 passes through the oil return chamber 205 and extends to the high-pressure oil inlet chamber 206, the outer wall of the valve core 201 is sprayed with anti-corrosion paint, the high-pressure oil flows into the valve body 1 through the high-pressure oil inlet chamber 206, and the high-pressure oil in the high-pressure oil inlet chamber 206 enters the spring chamber 204 in the valve core 201 after passing through the damping 203. When the oil pressure in the high-pressure oil inlet chamber 206 is higher than that in the spring chamber 204, the high-pressure oil in the high-pressure oil inlet chamber 206 is increased. When the oil pressure in 204 is equal to the sum of the spring force of the return spring 202, the valve core 201 is pushed by the hydraulic oil to change direction, and the high-pressure oil inlet chamber 206 communicates with the oil return chamber 205. A large amount of oil in the high-pressure oil inlet chamber 206 flows into the oil return chamber 205. As the oil in the high-pressure oil inlet chamber 206 is lost, the oil pressure in the high-pressure oil inlet chamber 206 decreases. The oil pressure in the high-pressure oil inlet chamber 206 cannot be maintained higher than the sum of the oil pressure in the spring chamber 204 and the spring force of the return spring 202. The return spring 202 will push the valve core 201 to move in the reverse direction, and the valve core 201 that moves in the reverse direction will return to its original position.

[0028] The working process of the utility model is as follows: when the large-flow pilot control structure designed by the present invention is in operation, high-pressure oil flows into the valve body 1 through the high-pressure oil inlet chamber 206, and the high-pressure oil in the high-pressure oil inlet chamber 206 enters the spring chamber 204 in the valve core 201 after passing through the damping 203. When the oil pressure in the high-pressure oil inlet chamber 206 is higher than the sum of the oil pressure in the spring chamber 204 and the spring force of the return spring 202, the valve core 201 is pushed by the hydraulic oil to change direction, and the high-pressure oil inlet chamber 206 communicates with the return oil chamber 205. A large amount of oil in the high-pressure oil inlet chamber 206 flows into the return oil chamber 205. As the oil in the high-pressure oil inlet chamber 206 is lost, the oil pressure in the high-pressure oil inlet chamber 206 decreases, and the oil pressure in the high-pressure oil inlet chamber 206 cannot be maintained higher than the sum of the oil pressure in the spring chamber 204 and the spring force of the return spring 202. The return spring 202 will push the valve core 201 to move in the opposite direction, and the valve core 201 that moves in the opposite direction will return to its original position.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A large flow pilot control structure, comprising a valve body (1), characterized in that: A guide mechanism (2) is arranged inside the valve body (1), a valve core cover (3) is installed on the left side of the valve body (1), a plug (4) is installed on the right side of the valve body (1), and an O-ring (5) is installed inside the valve body (1) and at the position of the valve core cover (3); The guide mechanism (2) comprises a valve core (201) installed inside the valve body (1); a return spring (202) is fixedly connected to the left side of the valve core (201) and inside the valve body (1); a damper (203) is arranged inside the valve body (1) and on the right side of the return spring (202); a spring chamber (204) is provided inside the valve core (201) and at a position corresponding to the return spring (202); an oil return chamber (205) is provided inside the valve body (1) and at a position corresponding to the valve core (201); and a high-pressure oil inlet chamber (206) is provided inside the valve body (1) and on the right side of the oil return chamber (205).

2. A large flow pilot control structure according to claim 1, characterized in that: The valve body (1), the valve core cover (3) and the plug (4) are all made of metal, and the O-ring (5) is made of rubber.

3. A large flow pilot control structure according to claim 1, characterized in that: The valve core cover (3) and the plug (4) are both connected to the valve body (1) via bolts, and the plug (4) penetrates and extends to the outside of the valve body (1).

4. A large flow pilot control structure according to claim 1, characterized in that: The valve core (201) is a reversing valve core, and the return spring (202) is connected to the valve core cover (3) in a fixed manner.

5. A large flow pilot control structure according to claim 1, characterized in that: The oil return chamber (205) is designed as an L-shaped structure, and the connection between the valve core (201) and the valve body (1) is a sliding connection.

6. A large flow pilot control structure according to claim 1, characterized in that: The valve core (201) penetrates the oil return chamber (205) and extends into the high-pressure oil inlet chamber (206); the outer wall of the valve core (201) is sprayed with anti-corrosion paint.

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