Two-speed logic shift valve

Abstract

The present invention discloses a two-speed logic shift valve, which comprises a valve body. The valve body is provided with a liquid inlet part and a liquid return part. The liquid inlet part has a large liquid inlet, a small liquid inlet, a liquid inlet spool, a liquid inlet and outlet, and a liquid inlet spring. The liquid inlet spool is arranged between the large liquid inlet and the small liquid inlet, and the liquid inlet spring is sleeved on the liquid inlet spool. A liquid inlet and outlet is arranged between the large liquid inlet and the small liquid inlet, and the liquid inlet and outlet is communicated with both the large liquid inlet and the small liquid inlet. According to the implementation requirements, the present invention feeds liquid into the large liquid inlet and the small liquid inlet respectively, and returns liquid from the large liquid return port and the small liquid return port respectively, so as to realize the rapid movement and slow movement of the hydraulic support. It is applied to the supports of high-end intelligent working faces and is used for precisely pushing the scraper conveyor and pulling the support. By sending a signal to the solenoid valve through the controller, the reversing valve is controlled to act, thereby realizing pulling the support and pushing the scraper conveyor.

Description

Technical Field

[0001] The present invention belongs to the technical field of valves, and particularly relates to a two-speed logic push valve. Background Art

[0002] The existing push valves used in the push and pull of hydraulic supports have complex structures and very low control accuracy for flow rate, and cannot stop accurately at a preset position. To solve this problem, it is generally achieved by slowly adjusting the push cylinder before reaching the preset position, but this will affect the production efficiency. Summary of the Invention

[0003] To solve the above problems, the present invention discloses a two-speed logic push valve, which can realize the rapid movement and slow movement of the hydraulic support by feeding liquid into the large liquid inlet and the small liquid inlet respectively according to actual needs.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] The two-speed logic push valve includes a valve body. The valve body is provided with a liquid inlet part and a liquid return part. The liquid inlet part has a large liquid inlet, a small liquid inlet, a liquid inlet valve core, a liquid inlet and outlet, and a liquid inlet spring. The liquid inlet valve core is arranged between the large liquid inlet and the small liquid inlet, and the liquid inlet spring is sleeved on the liquid inlet valve core. The liquid inlet and outlet is arranged between the large liquid inlet and the small liquid inlet, and the liquid inlet and outlet is communicated with both the large liquid inlet and the small liquid inlet. The liquid return part has a large liquid return port, a small liquid return port, a liquid return valve core, a liquid return outlet, and a liquid return spring. The liquid return valve core is arranged between the large liquid return port and the small liquid return port, and the liquid return spring is sleeved on the liquid return valve core. The liquid return outlet is arranged between the large liquid return port and the small liquid return port, and the liquid return outlet is communicated with both the large liquid return port and the small liquid return port.

[0006] In the above structure, the diameter of the large liquid inlet is larger than the diameter of the small liquid inlet.

[0007] In the above structure, the diameter of the large liquid return port is larger than the diameter of the small liquid return port.

[0008] In the above structure, the diameter of the large liquid inlet is 3 times the diameter of the small liquid inlet.

[0009] In the above structure, the diameter of the large liquid return port is 3 times the diameter of the small liquid return port.

[0010] In the above structure, the diameter of the large liquid inlet is equal to the diameter of the large liquid return port, and the diameter of the small liquid inlet is equal to the diameter of the small liquid return port.

[0011] In the above structure, the liquid inlet part further has a liquid inlet valve core sleeve and a liquid inlet spring sleeve. The liquid inlet valve core sleeve is installed in the valve body, the liquid inlet valve core is arranged in the liquid inlet valve core sleeve, a first through hole is opened on the liquid inlet valve core sleeve and communicated with the liquid inlet and outlet through the first through hole. The liquid inlet spring sleeve is threadedly connected to the valve body, and a second through hole is opened on the threaded sleeve of the liquid inlet spring sleeve and communicated with the large liquid inlet through the second through hole. The liquid return part further has a liquid return valve core sleeve and a liquid return spring sleeve. The liquid return valve core sleeve is installed in the valve body, the liquid return valve core is arranged in the liquid return valve core sleeve, a third through hole is opened on the liquid return valve core sleeve and communicated with the liquid return outlet through the third through hole. The liquid return spring sleeve is threadedly connected to the valve body, and a fourth through hole is opened on the threaded sleeve of the liquid return spring sleeve and communicated with the large liquid return port through the fourth through hole.

[0012] In the above structure, two annular grooves are opened on the liquid inlet spring sleeve, the two annular grooves are respectively located on both sides of the large liquid inlet, and O-ring rubber seals are sleeved on the two annular grooves. Two annular grooves are opened on the liquid return spring sleeve, the two annular grooves are respectively located on both sides of the large liquid return port, and O-ring rubber seals are sleeved on the two annular grooves.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] According to the implementation requirements, the present invention feeds liquid into the large liquid inlet and the small liquid inlet respectively, and returns liquid from the large liquid return port and the small liquid return port respectively, which can realize the rapid movement and slow movement of the hydraulic support. It is applied to the support of the high-end intelligent working face for accurately pushing the scraper conveyor and pulling the support frame. By sending a signal from the controller to the solenoid valve to control the action of the directional valve, the support frame pulling and scraper conveyor pushing can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0016] Figure 1 is a cross-sectional view of the double-speed logic push valve of the present invention;

[0017] Figure 2 is a perspective view of the double-speed logic push valve of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other.

[0019] To enable those skilled in the art to better understand the solution of this application, the following will clearly and completely describe the technical solutions in the embodiments of this application in combination with the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0020] As Figure 1 and Figure 2 shown, the two-speed logic push valve includes a valve body 1. The valve body 1 is provided with a liquid inlet part and a liquid return part. The liquid inlet part has a large liquid inlet 2, a small liquid inlet 3, a liquid inlet valve core 4, a liquid inlet and outlet 5, and a liquid inlet spring 6. The liquid inlet valve core 4 is arranged between the large liquid inlet 2 and the small liquid inlet 3. The liquid inlet spring 6 is sleeved on the liquid inlet valve core 4. The liquid inlet and outlet 5 is arranged between the large liquid inlet 2 and the small liquid inlet 3. The liquid inlet and outlet 5 is communicated with both the large liquid inlet 2 and the small liquid inlet 3. The liquid return part has a large liquid return port 7, a small liquid return port 8, a liquid return valve core 9, a liquid return outlet 10, and a liquid return spring 11. The liquid return valve core 9 is arranged between the large liquid return port 7 and the small liquid return port 8. The liquid return spring 11 is sleeved on the liquid return valve core 9. The liquid return outlet 10 is arranged between the large liquid return port 7 and the small liquid return port 8. The liquid return outlet 10 is communicated with both the large liquid return port 7 and the small liquid return port 8.

[0021] The diameter of the large liquid inlet 2 is larger than the diameter of the small liquid inlet 3.

[0022] The diameter of the large liquid return port 7 is larger than the diameter of the small liquid return port 8.

[0023] The diameter of the large liquid inlet 2 is 3 times the diameter of the small liquid inlet 3.

[0024] The diameter of the large liquid return port 7 is 3 times the diameter of the small liquid return port 8.

[0025] The diameter of the large liquid inlet 2 is equal to the diameter of the large liquid return port 7, and the diameter of the small liquid inlet 3 is equal to the diameter of the small liquid return port 8.

[0026] The liquid inlet part further includes a liquid inlet valve core sleeve 12 and a liquid inlet spring sleeve 13. The liquid inlet valve core sleeve 12 is installed in the valve body 1. The liquid inlet valve core 4 is arranged in the liquid inlet valve core sleeve 12. A first through hole 14 is formed in the liquid inlet valve core sleeve 12 and is communicated with the liquid inlet and outlet port 5 through the first through hole 14. The liquid inlet spring sleeve 13 is threadedly connected in the valve body 1. A second through hole 15 is formed in the threaded sleeve of the liquid inlet spring sleeve 13 and is communicated with the large liquid inlet port 2 through the second through hole 15. The liquid return part further includes a liquid return valve core sleeve 16 and a liquid return spring sleeve 17. The liquid return valve core sleeve 16 is installed in the valve body 1. The liquid return valve core 9 is arranged in the liquid return valve core sleeve 16. A third through hole 18 is formed in the liquid return valve core sleeve 16 and is communicated with the liquid return outlet port 10 through the third through hole 18. The liquid return spring sleeve 17 is threadedly connected in the valve body 1. A fourth through hole 19 is formed in the threaded sleeve of the liquid return spring sleeve 17 and is communicated with the large liquid return port 7 through the fourth through hole 19.

[0027] In the above structure, two annular grooves are formed in the liquid inlet spring sleeve 13. The two annular grooves are respectively located on both sides of the large liquid inlet port 2, and O-ring rubber seals are sleeved on the two annular grooves. Two annular grooves are formed in the liquid return spring sleeve 17. The two annular grooves are respectively located on both sides of the large liquid return port 7, and O-ring rubber seals are sleeved on the two annular grooves.

[0028] When in use, when rapid movement is required, liquid is fed into the large liquid inlet port 2 and liquid is returned from the large liquid return port 7 to achieve the rapid movement of the hydraulic support. When slow movement is required, liquid is fed into the small liquid inlet port 3 and liquid is returned from the small liquid return port 8 to achieve the slow movement of the hydraulic support, realizing accurate pushing and pulling of the scraper conveyor and improving production efficiency at the same time. Of course, several connection holes are also provided on the valve body 1 for fixation.

[0029] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, component disassembly or combination, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A two-speed logic shift valve, comprising a valve body, characterized in that: The valve body is provided with a liquid inlet part and a liquid return part. The liquid inlet part has a large liquid inlet, a small liquid inlet, a liquid inlet valve core, a liquid inlet and outlet, and a liquid inlet spring. The liquid inlet valve core is arranged between the large liquid inlet and the small liquid inlet. The liquid inlet spring is sleeved on the liquid inlet valve core. The liquid inlet and outlet is arranged between the large liquid inlet and the small liquid inlet. The liquid inlet and outlet is communicated with both the large liquid inlet and the small liquid inlet. The liquid return part has a large liquid return port, a small liquid return port, a liquid return valve core, a liquid return outlet, and a liquid return spring. The liquid return valve core is arranged between the large liquid return port and the small liquid return port. The liquid return spring is sleeved on the liquid return valve core. The liquid return outlet is arranged between the large liquid return port and the small liquid return port. The liquid return outlet is communicated with both the large liquid return port and the small liquid return port; The liquid inlet part further has a liquid inlet valve core sleeve and a liquid inlet spring sleeve. The liquid inlet valve core sleeve is installed in the valve body. The liquid inlet valve core is arranged in the liquid inlet valve core sleeve. The liquid inlet valve core sleeve is provided with a first through hole, which is communicated with the liquid inlet and outlet through the first through hole. The liquid inlet spring sleeve is threadedly connected to the valve body. The liquid inlet spring sleeve threaded sleeve is provided with a second through hole, which is communicated with the large liquid inlet through the second through hole. The liquid return part further has a liquid return valve core sleeve and a liquid return spring sleeve. The liquid return valve core sleeve is installed in the valve body. The liquid return valve core is arranged in the liquid return valve core sleeve. The liquid return valve core sleeve is provided with a third through hole, which is communicated with the liquid return outlet through the third through hole. The liquid return spring sleeve is threadedly connected to the valve body. The liquid return spring sleeve threaded sleeve is provided with a fourth through hole, which is communicated with the large liquid return port through the fourth through hole. The diameter of the large liquid inlet is larger than the diameter of the small liquid inlet. The diameter of the large liquid return port is larger than the diameter of the small liquid return port; When rapid movement is required, liquid is fed into the large liquid inlet and the liquid returns from the large liquid return port to achieve the rapid movement of the hydraulic support. When slow movement is required, liquid is fed into the small liquid inlet and the liquid returns from the small liquid return port to achieve the slow movement of the hydraulic support, realizing precise coal plough pushing and support pulling.

2. The two-speed logic push valve according to claim 1, wherein: The diameter of the large liquid inlet is 3 times the diameter of the small liquid inlet.

3. The two-speed logic push valve according to claim 2, characterized in that: The diameter of the large liquid return port is 3 times the diameter of the small liquid return port.

4. The two-speed logic push valve according to claim 1, wherein: The diameter of the large liquid inlet is equal to the diameter of the large liquid return port, and the diameter of the small liquid inlet is equal to the diameter of the small liquid return port.

5. The two-speed logic push valve according to claim 1, wherein: Two annular grooves are provided on the liquid inlet spring sleeve. The two annular grooves are respectively located on both sides of the large liquid inlet, and O-ring rubber seals are sleeved on both of the two annular grooves. Two annular grooves are provided on the liquid return spring sleeve. The two annular grooves are respectively located on both sides of the large liquid return port, and O-ring rubber seals are sleeved on both of the two annular grooves.

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