CN216519796U - Double-core one-way valve for controlling fluid direction in hydraulic system - Google Patents

Abstract

The utility model discloses a double-core one-way valve for controlling the direction of fluid in a hydraulic system, which solves the problem of large pressure loss of the hydraulic system and has the technical scheme that the key points are as follows: the valve comprises a valve body, the inside main valve core that is provided with of valve body, the inside holding tank that is provided with of main valve core, be provided with the secondary valve core in the holding tank, be provided with main spring between main valve core and the valve body, be provided with inferior spring between secondary valve core and the valve body, inferior spring be located inside the main spring, main valve core holding tank side be provided with out the liquid hole, the holding tank top be provided with the feed liquor hole, feed liquor hole and holding tank intercommunication. The purpose of reducing pressure loss is achieved.

Description

A two-core check valve for controlling the direction of fluid in a hydraulic system

technical field

The utility model belongs to the technical field of hydraulic systems, in particular to a double-core check valve for controlling the direction of fluid in a hydraulic system.

Background technique

The check valve is a valve that controls the direction of oil flow in the hydraulic system. Its main function is to control the flow of oil in one direction. When the oil flows in the opposite direction, the valve port has better sealing performance and no leakage. And there should be no vibration, shock and noise when working. The structure and working principle of the check valve are relatively simple, but it is one of the most used components in the hydraulic system. The correct and reasonable selection and application of the check valve will make the hydraulic system meet different working conditions.

At present, the one-way valve on the market is divided into two types: ball valve type and poppet valve type. Among them, in terms of reverse sealing, the poppet valve type one-way valve has good guidance and reliable sealing, so it is the most widely used, but its pressure loss is high. It will be larger, so studying how to reduce the pressure loss of the poppet check valve plays an important role in the working efficiency of the hydraulic system.

Utility model content

Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a double-core check valve that can reduce pressure loss.

The purpose of the utility model is achieved as follows: a dual-core one-way valve for controlling the direction of fluid in a hydraulic system, comprising a valve body (5), the valve body (5) is provided with a main valve core (1) inside, An accommodating groove (6) is arranged inside the main valve core (1), a secondary valve core (2) is arranged in the accommodating groove (6), and a main valve core (1) and the valve body (5) are arranged between the main valve core (1) and the valve body (5). There is a main spring (3), a secondary spring (4) is arranged between the secondary valve core (2) and the valve body (5), and the secondary spring (4) is located inside the primary spring (3). A liquid outlet hole (7) is provided on the side of the accommodating groove (6) of the main valve core (1), a liquid inlet hole (8) is provided on the top of the accommodating groove (6), and the liquid inlet hole (8) is connected to the accommodating groove. (6) Connectivity.

Further, the number of the liquid outlet holes (7) is 4, and the liquid outlet holes are evenly distributed around the main valve core (1).

Further, the main valve core (1) is provided with a first clamping groove, one end of the main spring (3) is located in the first clamping groove, and the secondary valve core (2) is provided with a second clamping groove, so One end of the secondary spring (4) is located in the second slot.

Further, there is clearance fit between the main valve core (1) and the valve body (5), and clearance fit between the secondary valve core (2) and the main valve core (1).

Further, the tops of the main valve core (1) and the secondary valve core (2) are both conical.

Compared with the prior art, the present utility model has outstanding and beneficial technical effects: when the oil pushes open the one-way valve, the internal valve core will also be opened, the hydraulic oil will continue to flow from the gap between the main valve core and the valve body, and Where the pressure loss of hydraulic oil is relatively large, the secondary spool can be opened and flow out through the internal flow passage of the main spool, reducing its pressure loss. When the flow is shut off, it can also ensure its tightness, because the internal valve core is not easy to be damaged, and non-metallic materials can also be used, thereby reducing the cost and weight; and because of its simple structure and convenient processing, it has low production cost and adaptability. Strong, and can be used in conjunction with the check valve and other valves.

Description of drawings

Fig. 1 is the structural representation of the present utility model;

Fig. 2 is the structural schematic diagram of the main valve core of the present invention;

3 is a cross-sectional view of the main valve core of the present invention.

In the figure: 1. Main valve core; 2. Secondary valve core; 3. Main spring; 4. Secondary spring; 5. Valve body;

Detailed ways

In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention. The described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

The utility model provides a double-core one-way valve for controlling the direction of fluid in a hydraulic system, comprising a valve body 5, a main valve core 1 is arranged inside the valve body 5, and a space between the main valve core 1 and the valve body 5 is provided. For clearance fit, the main valve core 1 is provided with an accommodation groove 6 inside, the accommodation groove 6 is provided with a secondary valve core 2, and the secondary valve core 2 and the main valve core 1 are clearance-fitted, wherein the The tops of the main spool 1 and the secondary spool 2 are tapered;

A main spring 3 is arranged between the main valve core 1 and the valve body 5 , the main valve core 1 is provided with a first clamping groove, one end of the main spring 3 is located in the first clamping groove, and the main spring 3 is connected to the first clamping groove. The main valve core 1 is in clearance fit, a secondary spring 4 is arranged between the secondary valve core 2 and the valve body 5, the secondary spring 4 is located inside the main spring 3, and the secondary valve core 2 is provided with a second slot, One end of the secondary spring 4 is located in the second slot, and the secondary spring 4 is in clearance fit with the secondary valve core 2. The primary spring 3 and the secondary spring 4 are in a parallel relationship and act on the two valve cores respectively. Make the sum of the force of the two springs equal to the force of one spring of a conventional check valve.

The main valve core 1 is provided with a liquid outlet hole 7 on the side of the accommodating tank 6, and a liquid inlet hole 8 is provided on the top of the accommodating tank 6. The liquid inlet hole 8 communicates with the accommodating tank 6. During operation, the hydraulic oil passes through. The pipeline flows into the valve body 5, and the main spool 1 in the valve body 5 is pushed open by the hydraulic oil, so that a gap for the hydraulic oil to pass through is formed between the main spool 1 and the valve body 5, and the secondary spool 2 is also blocked by the hydraulic oil. The top is opened, so that the liquid inlet hole 8 is connected with the liquid outlet hole 7, and the flow area is increased. When the top of the secondary valve core 2 is 5.5 mm from the top of the receiving groove 6, the working effect is better; in the non-working state, the main valve core 1 and the secondary valve core The valve core 2 is in contact with the valve body 5 hole and the main valve core 1 hole respectively under the action of the spring to realize the reverse cut-off. Under the guarantee of the original reverse cut-off function, not only the flow area is increased, but also the pressure loss of the traditional one-way valve when it is subjected to the pressure from the hydraulic oil is reduced by the "double-core" structure, thereby improving the work. efficiency.

The utility model is further optimized in that the number of the liquid outlet holes 7 is 4, and the liquid outlet holes 7 are evenly distributed around the main valve core 1, the four liquid outlet holes 7 are distributed symmetrically in the center, and the liquid outlet holes 7 can be reduced. Radial unbalanced force on the spool.

The above-mentioned embodiments are only preferred embodiments of the present utility model, and do not limit the protection scope of the present utility model accordingly. Therefore: all equivalent changes made according to the structure, shape and principle of the present utility model shall be covered by the present utility model. within the scope of protection of the utility model. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention.

Claims (5)

1. A dual-core check valve for controlling the direction of fluid in a hydraulic system, comprising a valve body (5), characterized in that a main valve core (1) is provided inside the valve body (5), and the main valve body (5) is provided with a main valve core (1). An accommodating groove (6) is arranged inside the valve core (1), a secondary valve core (2) is arranged in the accommodating groove (6), and a main spring (2) is arranged between the main valve core (1) and the valve body (5). 3), a secondary spring (4) is arranged between the secondary valve core (2) and the valve body (5), the secondary spring (4) is located inside the main spring (3), and the primary valve core ( 1) The side of the holding tank (6) is provided with a liquid outlet hole (7), the top of the holding tank (6) is provided with a liquid inlet hole (8), and the liquid inlet hole (8) communicates with the holding tank (6) . 2 . The dual-core check valve for controlling the direction of fluid in a hydraulic system according to claim 1 , wherein the number of the liquid outlet holes ( 7 ) is 4, and the liquid outlet holes ( 7 ) are evenly distributed. 3 . around the main spool (1). 3. The dual-core check valve for controlling the direction of fluid in a hydraulic system according to claim 1, wherein the main valve core (1) is provided with a first snap groove, and the main spring (3) One end of the secondary spring (4) is located in the first clamping groove, the secondary valve core (2) is provided with a second clamping groove, and one end of the secondary spring (4) is located in the second clamping groove. 4 . The dual-core check valve for controlling the direction of fluid in a hydraulic system according to claim 1 , wherein the main valve core ( 1 ) and the valve body ( 5 ) are in clearance fit, and the secondary valve There is a clearance fit between the core (2) and the main valve core (1). 5 . The dual-core check valve for controlling the direction of fluid in a hydraulic system according to claim 1 , wherein the tops of the main valve core ( 1 ) and the secondary valve core ( 2 ) are both conical. 6 .

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