Hydraulic control reversing valve

Abstract

A hydraulic control reversing valve comprises a valve body and a valve cavity formed in the valve body. A control port for pressure liquid to enter the valve cavity is formed in the right end face of the valve body, a pressure liquid backflow port which is located on the left side and allows the pressure liquid to flow back to the valve cavity and return to the pressure liquid supply container from the control port is formed in the front end face of the valve body, and a liquid inlet which is located on the right side and allows working liquid to enter the valve cavity is formed in the lower end face of the valve body. The working ports are located on the left side, allow the working liquid to flow back to the valve cavity and return to the working liquid supply container from the liquid inlet, are located in the middle, are distributed in a rectangular array and convey the working liquid to corresponding liquid supply targets; the valve cavity is provided with installation areas, pressure liquid flowing channels and working liquid flowing channels, the number of the installation areas is the same as that of the working ports, the installation areas are communicated with the pressure liquid flowing channels and the working liquid flowing channels, a valve element assembly is arranged, and the valve element assembly is opened through pressure liquid and allows the working liquid to reach the working ports after being opened.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a hydraulically controlled reversing valve. Background Art

[0002] The hydraulically controlled reversing valve is a valve that can reverse the flow of fluid by controlling the fluid pressure. This valve occupies an important position in the hydraulic support equipment of coal mine machinery.

[0003] Currently, the flow rate of the working fluid supplied by the existing hydraulically controlled reversing valve is fixed, which results in a fixed supply speed of the working fluid, and thus cannot meet the demand for high-power fluid supply targets. Utility Model Content

[0004] The present invention aims to solve the above-mentioned shortcomings of the prior art and provides a hydraulically controlled reversing valve for solving the above-mentioned problems.

[0005] The utility model adopts a technical solution to solve its technical problems: this hydraulically controlled reversing valve comprises a valve body and a valve cavity formed in the valve body, the valve body having a control port formed on its right end face for supplying pressure liquid into the valve cavity, a pressure liquid reflux port formed on the front end face and located on the left side for allowing pressure liquid to flow back to the valve cavity and return from the control port to the pressure liquid supply container, and a liquid inlet formed on the lower end face and located on the right side for supplying working liquid into the valve cavity, a liquid inlet located on the left side for allowing working liquid to flow back to the valve cavity and return from the liquid inlet to the working liquid supply container, and a plurality of working ports distributed in a rectangular array in the middle and transporting working liquid to corresponding liquid supply targets, the valve cavity having an installation area, a pressure liquid flow channel, and a working liquid flow channel that are the same as the number of working ports formed on the valve body, the installation area being connected to the pressure liquid flow channel and the working liquid flow channel, and a valve core assembly being provided, the valve core assembly being opened by pressure liquid and allowing working liquid to reach the working port after opening.

[0006] Further improvement, the valve core assembly includes an outer shell, a screw plug, a valve seat, an inner sleeve, and a valve core. The outer shell seal is arranged in the installation area, the screw plug is arranged on the valve body and is used to limit the final position of the outer shell in the installation area, the valve seat seal is arranged in the outer shell, the inner sleeve seal is arranged in the outer shell and a moving cavity adapted to the outer diameter size of the valve core is formed between the outer shell, the valve core moves in the moving cavity and is sealed with the inner sleeve and the outer shell, abuts against the valve seat, and a spring is arranged between the valve core and the outer shell to reset the valve core and cut off the flow of working fluid after the pressure liquid flows back.

[0007] For further improvement, a valve plug arranged in a circle is provided at the center position of the valve core, and the valve plug abuts against the valve seat when preventing the working fluid from reaching the working port, and the part abutting against the valve seat is an abutting base surface with an inclination.

[0008] Further improvement, the lower end surface of the valve plug is a flat support base surface, and the upper end of the spring is supported on the support base surface.

[0009] To be further improved, the pressure liquid flow channel includes a first main channel arranged horizontally, two first branch channels arranged longitudinally, and a first return channel arranged horizontally. The first main channel is connected to the control port, and the two ends of the first branch channel are respectively connected to the upper part of the corresponding installation area, and the first return channel is connected to the pressure liquid return port.

[0010] To be further improved, the working liquid flow channel includes a second main channel arranged horizontally, two second branch channels arranged vertically, a working channel with the same number as the working ports and arranged vertically, and a second return channel arranged horizontally. The second main channel is connected to the liquid inlet, and the two ends of the second branch channel are respectively connected to the lower part of the corresponding installation area, the working channel is connected to the working port, and the second return channel is connected to the working liquid return port.

[0011] The beneficial effects of the utility model are:

[0012] 1. The utility model controls the flow rate by controlling the opening number of the valve core assembly, which can realize the selection of multiple flow rates and meet the needs of different operations and the use of high-power liquid supply targets;

[0013] 2. The utility model allows the working liquid and the pressure liquid to flow back into the corresponding container after the liquid supply target stops working, thereby realizing the recycling of the working liquid and the pressure liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the full cross-section structure of the utility model;

[0015] Figure 2 It is the structural schematic diagram below of the utility model. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the accompanying drawings:

[0017] Referring to the accompanying drawings: This hydraulically controlled reversing valve comprises a valve body 1, and a valve cavity 11 formed in the valve body 1, the valve body 1 is formed on its right end surface with a control port 12 for supplying pressure liquid into the valve cavity 11, a pressure liquid return port 13 is formed on the front end surface and is located on the left side and allows the pressure liquid to flow back to the valve cavity 11 and return to the pressure liquid supply container from the control port 12, and a liquid inlet 14 is formed on the right side and allows the working liquid to enter the valve cavity 11, and a liquid inlet 14 is formed on the lower end surface and is located on the left side and allows the working liquid to flow back to the valve cavity 11 and return to the working liquid supply container from the liquid inlet 14. A working liquid return port 15 for the container, and several working ports 16 located in the middle and distributed in a rectangular array and transporting the working liquid to the corresponding liquid supply target, the valve cavity 11 is formed on the valve body 1 with an installation area 11-1, a pressure liquid flow channel 17, and a working liquid flow channel 18, the number of which is the same as the working ports 16. The installation area 11-1 is connected to the pressure liquid flow channel 17 and the working liquid flow channel 18, and a valve core assembly 2 is provided. The valve core assembly 2 is opened by the pressure liquid and allows the working liquid to reach the working port 16 after opening. The principle of the present invention is that the control port 12 supplies pressure liquid into the valve cavity 11, and is guided to the installation area 11-1 through the pressure liquid flow channel 17, so that the valve core assembly 2 installed in the installation area 11-1 is opened by the liquid pressure, and the liquid inlet 14 supplies working liquid into the valve cavity 11, and is guided to the installation area 11-1 through the working liquid flow channel 18 (the working liquid and the pressure liquid do not mix), so that the valve core assembly 2 is opened and flows from the working port 16 to the required liquid supply target (i.e., the pressure support equipment). At the same time, there are several working ports 16, and the number of working ports 16 is consistent with that of the valve core assembly 2. In this way, the opening number of the valve core assembly 2 can be controlled according to the inlet amount of the pressure liquid. The opening number of the valve core assembly 2 is closely related to the flow rate of the working liquid, that is, when the valve core assembly 2 is fully opened, the flow rate can reach 1600 ml / min, and when selectively opened, the flow rate can reach 1250 ml / min, 1000 ml / min, 800 ml / min, 630 ml / min, etc., and the pressure is 31.5Mpa, so as to realize multi-position selection. The working liquid reflux port 15 and the pressure liquid reflux port 13 are both used to return the working liquid and the pressure liquid to the corresponding container after the liquid supply target stops working, so as to realize the recycling of the working liquid and the pressure liquid.

[0018] The valve core assembly 2 includes a shell 21, a screw plug 22, a valve seat 23, an inner sleeve 24, and a valve core 25. The shell 21 is sealed and arranged in the installation area 11-1. The screw plug 22 is arranged on the valve body 1 and is used to limit the final position of the shell 21 in the installation area 11-1. The valve seat 23 is sealed and arranged in the shell 21. The inner sleeve 24 is sealed and arranged in the shell 21 and a moving cavity 21-1 that is adapted to the outer diameter of the valve core 25 is formed between the shell 21. The valve core 25 moves in the moving cavity 21-1 and is sealed with the inner sleeve 24 and the shell 21, abuts against the valve seat 23, and is provided with a spring 3 between the shell 21 to reset the valve core 25 and cut off the flow of the working fluid after the pressure liquid refluxes. The shell 21 is installed When in the installation area 11-1, the pressure liquid flow channel 17 and the working liquid flow channel 18 are separated to prevent the two from merging, and there is a flow port 21-2 that allows the pressure liquid and the working liquid to circulate. The valve seat 23 and the inner sleeve 24 are arranged inside, and the valve core 25 moves inside. The inner sleeve 24 provides support for the upper part of the valve core 25 to ensure the movement stability of the valve core 25. The valve seat 23 cooperates with the valve core 25 to form an open / close, that is, when it is open, the working liquid passes through and flows to the working port 16, and when it is closed, the working liquid is prevented from flowing to the working port 16. The spring 3 is used to drive the valve core 25 to reset and close after the pressure liquid flows back, that is, it is achieved by utilizing the elasticity generated by the compression deformation of the valve core 25 when it is opened.

[0019] The valve core 25 has a valve plug 25-1 arranged in a circle at the center position. The valve plug 25-1 abuts against the valve seat 23 when preventing the working fluid from reaching the working port 16, and the portion abutting against the valve seat 23 is an abutting base surface 25-11 with an inclination. The valve plug 25-1 cooperates with the valve seat 23 to form an open / closed state, that is, when closed, it prevents the working fluid from passing through the flow port 21-2 located below the valve seat 23, and conversely allows the working fluid to pass through when open, and the abutting base surface 25-11 has an inclination that can quickly achieve closed / closed cooperation with the valve seat 23, thereby achieving rapid liquid flow or liquid cut-off.

[0020] The lower end surface of the valve plug 25 - 1 is a planar support base surface 25 - 12 , and the upper end of the spring 3 is supported on the support base surface 25 - 12 . This arrangement facilitates the support of the spring 3 , so that the force effect of the spring 3 is better.

[0021] The pressure liquid flow channel 17 includes a transversely arranged first main channel 17-1, two longitudinally arranged first branch channels 17-2, and a transversely arranged first return channel 17-3. The first main channel 17-1 is connected to the control port 12, and the two ends of the first branch channel 17-2 are respectively connected to the upper part of the corresponding installation area 11-1. The first return channel 17-3 is connected to the pressure liquid return port 13. Such an arrangement can distribute the pressure liquid to each installation area 11-1, meet the requirements of selective opening, and also facilitate the return of the pressure liquid.

[0022] The working liquid flow channel 18 includes a horizontally arranged second main channel 18-1, two longitudinally arranged second branch channels 18-2, working channels 18-3 which are the same in number as the working ports 16 and are arranged vertically, and a horizontally arranged second return channel 18-4. The second main channel 18-1 is connected to the liquid inlet 14, and the two ends of the second branch channel 18-2 are respectively connected to the lower section of the corresponding installation area 11-1. The working channel 18-3 is connected to the working port 16, and the second return channel 18-4 is connected to the working liquid return port 15. Such an arrangement can distribute the working liquid to each working port 16, and the flow rate has multiple options such as 1600 ml / min, 1250 ml / min, 1000 ml / min, 800 ml / min, 630 ml / min, etc., and it also facilitates the return of the working liquid.

[0023] While the present invention has been shown and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A hydraulically controlled reversing valve, comprising a valve body (1) and a valve cavity (11) formed in the valve body (1), characterized in that: The valve body (1) is formed on its right end face with a control port (12) for supplying pressure liquid into the valve cavity (11), a pressure liquid return port (13) located on the left side and allowing pressure liquid to flow back to the valve cavity (11) and return to the pressure liquid supply container through the control port (12) is formed on the front end face, and a liquid inlet (14) located on the right side and for supplying working liquid into the valve cavity (11), a working liquid return port (15) located on the left side and allowing working liquid to flow back to the valve cavity (11) and return to the working liquid supply container through the liquid inlet (14) is formed on the lower end face, and the pressure liquid return port (15) located in the middle is formed. The stems are distributed in a rectangular array and transport the working liquid to a plurality of working ports (16) of the corresponding liquid supply targets. The valve cavity (11) is formed on the valve body (1) with an installation area (11-1) that is the same in number as the working ports (16), a pressure liquid flow channel (17), and a working liquid flow channel (18). The installation area (11-1) is connected to the pressure liquid flow channel (17) and the working liquid flow channel (18), and a valve core assembly (2) is provided. The valve core assembly (2) is opened by the pressure liquid and allows the working liquid to reach the working port (16) after opening.

2. The hydraulically controlled reversing valve according to claim 1, characterized in that: The valve core assembly (2) comprises an outer shell (21), a screw plug (22), a valve seat (23), an inner sleeve (24), and a valve core (25); the outer shell (21) is sealed and arranged in the installation area (11-1); the screw plug (22) is arranged on the valve body (1) and is used to limit the final position of the outer shell (21) in the installation area (11-1); the valve seat (23) is sealed and arranged in the outer shell (21); the inner sleeve (24) is sealed and arranged in the outer shell (21); and a movable cavity (21-1) adapted to the outer diameter size of the valve core (25) is formed between the inner sleeve (24) and the outer shell (21); the valve core (25) moves in the movable cavity (21-1) and is sealed with the inner sleeve (24) and the outer shell (21), abuts against the valve seat (23), and a spring (3) is arranged between the valve core (25) and the outer shell (21) to reset the valve core (25) and cut off the flow of the working fluid after the pressure liquid flows back.

3. The hydraulically controlled reversing valve according to claim 2, characterized in that: A valve plug (25-1) arranged in a circle is provided at the center of the valve core (25). The valve plug (25-1) abuts against the valve seat (23) when preventing the working fluid from reaching the working port (16), and the portion abutting against the valve seat (23) is an abutting base surface (25-11) with an inclination.

4. The hydraulically controlled reversing valve according to claim 3, characterized in that: The lower end surface of the valve plug (25-1) is a planar support base surface (25-12), and the upper end of the spring (3) is supported on the support base surface (25-12).

5. The hydraulically controlled reversing valve according to claim 1, characterized in that: The pressure liquid flow channel (17) includes a first main channel (17-1) arranged transversely, two first branch channels (17-2) arranged longitudinally, and a first return channel (17-3) arranged transversely, wherein the first main channel (17-1) is connected to the control port (12), the two ends of the first branch channel (17-2) are respectively connected to the upper part of the corresponding installation area (11-1), and the first return channel (17-3) is connected to the pressure liquid return port (13).

6. The hydraulically controlled reversing valve according to claim 1, characterized in that: The working liquid flow channel (18) includes a second main channel (18-1) arranged horizontally, two second branch channels (18-2) arranged vertically, working channels (18-3) having the same number as the working port (16) and arranged vertically, and a second return channel (18-4) arranged horizontally, wherein the second main channel (18-1) is connected to the liquid inlet (14), the two ends of the second branch channel (18-2) are respectively connected to the lower section of the corresponding installation area (11-1), the working channel (18-3) is connected to the working port (16), and the second return channel (18-4) is connected to the working liquid return port (15).

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