Interlock valve for hydraulic support

Abstract

The present invention discloses an interlocking valve for a hydraulic support, comprising a valve body, in which a first one-way valve string and a second one-way valve string are arranged, the first one-way valve string has a first valve seat and a first end plug arranged opposite thereto, a first liquid inlet and a first reflux port are provided on the first valve seat, a first valve core is arranged in the first valve seat, and a first return spring is arranged in the first accommodation chamber between the first valve core and the first end plug; the structure of the second one-way valve string is similar to that of the first one-way valve string, wherein the first accommodation chamber is connected to the second liquid inlet of the second one-way valve string through a first damping channel, and the second accommodation chamber of the second one-way valve string is connected to the first liquid inlet through a second damping channel. The present invention has an ingenious structure and is easy to install, and can fully avoid the safety hazards caused by the hydraulic support performing two actions at the same time, ensure the stability and safety of the coal mining process, maintain the life safety of operators, and improve the economic benefits of coal mining.

Description

Technical Field

[0001] The invention relates to the technical field of control valves for coal mine hydraulic supports, in particular to an interlocking valve for hydraulic supports. Background Art

[0002] Each action of the hydraulic support in coal mines is controlled by the reversing valve group. The hydraulic support columns and jacks can be controlled by the reversing valve group to act individually or simultaneously, but in some cases, when the hydraulic support performs two actions at the same time, it will cause safety hazards. For example, when the frame is operated in coal mines, the safety hazard of lowering and moving the frame at the same time is particularly serious. Therefore, it is urgent to design an interlocking valve. When the reversing valve group is manipulated to realize one support action, the interlocking valve is used to synchronously lock another action so that it is not controlled by the manipulating valve group. Summary of the invention

[0003] The present invention provides an interlocking valve for a hydraulic support capable of preventing two actions from occurring simultaneously, and the following technical solutions can be specifically adopted:

[0004] The interlocking valve for a hydraulic support of the present invention comprises a valve body, wherein the valve body is provided with

[0005] a first one-way valve string, comprising a first valve seat and a first end plug arranged opposite thereto, wherein a first liquid inlet and a first return port are provided on the first valve seat, a first valve core for connecting and disconnecting the first liquid inlet and the first return port is arranged in the first valve seat, and a first return spring is arranged in a first accommodating cavity between the first valve core and the first end plug;

[0006] a second one-way valve string, comprising a second valve seat and a second end plug arranged opposite thereto, the second valve seat being provided with a second liquid inlet and a second return port, the second valve seat being provided with a second valve core for connecting and disconnecting the second liquid inlet and the second return port, and a second return spring being provided in a second accommodating cavity between the second valve core and the second end plug;

[0007] Wherein, the first accommodating chamber is connected with the second liquid inlet through a first damping channel, and the second accommodating chamber is connected with the first liquid inlet through a second damping channel.

[0008] The first liquid inlet of the first valve seat is connected to a first pipe joint screwed on the valve body, and the first reflux port of the first valve seat is connected to a first interface pipe opened on the valve body;

[0009] The second liquid inlet of the second valve seat is communicated with a second pipe joint screwed on the valve body, and the second reflux port of the second valve seat is communicated with a second interface pipe opened on the valve body.

[0010] The first one-way valve string and the second one-way valve string are arranged in parallel, and the first liquid inlet is arranged at the left end of the first valve seat, and the first pipe joint is arranged at the left end of the valve body; the second liquid inlet is arranged at the right end of the second valve seat, and the second pipe joint is arranged at the right end of the valve body; the first reflux port is arranged at the top of the first valve seat, and the first interface pipe extends to the upper end of the valve body, and the second reflux port is arranged at the bottom of the second valve seat, and the second interface pipe extends to the lower end of the valve body.

[0011] One end of the first damping channel is connected to the first accommodating chamber, and the other end is connected to the second pipe joint; one end of the second damping channel is connected to the second accommodating chamber, and the other end is connected to the first pipe joint.

[0012] The first damping channel and the second damping channel both extend to the outer edge of the valve body, and high-pressure plugging is arranged at the end.

[0013] The first valve core and the first valve seat, the second valve core and the second valve seat are all conical contact structures.

[0014] The first accommodating chamber further includes a first positioning groove formed at the opposite surfaces of the first valve core and the first end plug; the second accommodating chamber further includes a second positioning groove formed at the opposite surfaces of the second valve core and the second end plug.

[0015] The interlocking valve for the hydraulic support provided by the present invention has an ingenious structure and is easy to install. It can fully avoid the potential safety hazards caused by the hydraulic support performing two actions at the same time, ensure the stability and safety of the coal mining process, protect the life safety of operators, and improve the economic benefits of coal mining. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 yes Figure 1 Hydraulic schematic diagram. DETAILED DESCRIPTION

[0018] The interlocking valve for a hydraulic support described in the present invention comprises a valve body, in which a first one-way valve series is arranged, comprising a first valve seat and a first end plug arranged opposite thereto, a first liquid inlet and a first return port are provided on the first valve seat, a first valve core for connecting and disconnecting the first liquid inlet and the first return port is provided in the first valve seat, and a first return spring is provided in the first accommodating chamber between the first valve core and the first end plug; a second one-way valve series is also arranged in the valve body, comprising a second valve seat and a second end plug arranged opposite thereto, a second liquid inlet and a second return port are provided on the second valve seat, a second valve core for connecting and disconnecting the second liquid inlet and the second return port is provided in the second valve seat, and a second return spring is provided in the second accommodating chamber between the second valve core and the second end plug; wherein the first accommodating chamber is connected to the second liquid inlet through a first damping channel, and the second accommodating chamber is connected to the first liquid inlet through a second damping channel.

[0019] The following is a detailed description of an embodiment of the present invention in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and specific action process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0020] like Figure 1 , 2 As shown, the present invention includes a first one-way valve string and a second one-way valve string arranged in parallel in the valve body. The first one-way valve string 1 is used to control the column jack N to lower the column. At the same time, by cooperating with the second one-way valve string 2, the push jack M is in a locked state; the second one-way valve string 2 is used to control the push jack M to pull the frame. At the same time, by cooperating with the first one-way valve string 1, the column jack N is in a locked state.

[0021] Specifically, two parallel transverse through holes are provided in the valve body. The first pipe joint PA is screwed and installed on the left side of the upper transverse through hole, and the first one-way valve string is installed on the right side; the second pipe joint PB is screwed and installed on the right side of the upper transverse through hole, and the second one-way valve string is installed on the left side. The upper and lower transverse through holes are connected by two damping holes (i.e., the first damping channel 1.5 and the second damping channel 2.5). A through hole A extending to the top of the valve body is provided on the upper transverse through hole, and a through hole B extending to the bottom of the valve body is provided on the lower transverse through hole.

[0022] The first one-way valve string includes a first valve seat 1.1, a first valve core 1.2, a first return spring 1.3 and a first end plug 1.4 arranged in sequence from left to right. The first valve seat 1.1 is positioned at the inner hole plane on the left side of the upper transverse through hole, and the first valve core 1.2 is installed in the first valve seat 1.1. The two are in sealing contact with a conical surface, and the first end plug 1.4 that is sealed with the right side of the first valve seat 1.1 is screwed on the valve body. A first return spring 1.3 is installed between the first valve core 1.2 and the first end plug 1.4, wherein the first valve core 1.2 and the first end plug 1.4 are provided with a first positioning groove at the opposite surface, and the end of the first return spring 1.3 is clamped in the above-mentioned first positioning groove. The first liquid inlet of the first valve seat 1.1 is located on its left end surface and is connected to the first pipe joint PA. The first return port of the first valve seat 1.1 is connected to the through hole A on the upper transverse through hole, and the liquid flowing out of the through hole A enters the rod chamber of the column jack N. When liquid flows into the first pipe joint PA, the first valve core 1.2 moves rightward, so that the first liquid inlet and the first reflux port are connected.

[0023] The second one-way valve string includes a second valve seat 2.1, a second valve core 2.2, a second return spring 2.3 and a second end plug 2.4 arranged from right to left. The second valve seat 2.1 is positioned at the inner hole plane on the right side of the lower transverse through hole, and the second valve core 2.2 is installed in the second valve seat 2.1. The two are in sealing contact with a conical surface, and the second end plug 2.4 that is sealed with the right side of the second valve seat 2.1 is screwed on the valve body. A second return spring 2.3 is installed between the second valve core 2.2 and the second end plug 2.4, wherein the second valve core 2.2 and the second end plug 2.4 are provided with a second positioning groove at the opposite surface, and the end of the second return spring 2.3 is clamped in the above-mentioned second positioning groove. The first liquid inlet of the second valve seat 2.1 is located on its right end surface and is connected to the second pipe joint PB. The second return port of the second valve seat 2.1 is connected to the through hole B on the lower transverse through hole, and the liquid flowing out of the through hole B enters the rodless chamber of the push jack N. When liquid flows into the second pipe joint PB, the second valve core 2.2 moves leftward, so that the second liquid inlet and the second reflux port are connected.

[0024] The first damping channel 1.5 and the second damping channel 2.5 (i.e., two damping holes between the upper and lower transverse through holes) are provided between the first one-way valve series and the second one-way valve series to realize the interlocking of various actions of the hydraulic support. Specifically, one end of the first damping channel 1.5 is connected to the first accommodating chamber 1.6 between the first valve core 1.2 and the first end plug 1.4, and the other end is connected to the second pipe joint PB; one end of the second damping channel 2.5 is connected to the second accommodating chamber 2.6 between the second valve core 2.2 and the second end plug 2.4, and the other end is connected to the first pipe joint PA. Both the first damping channel 1.5 and the second damping channel 2.5 extend to the outer edge of the valve body, and high-pressure plugs are installed at the ends.

[0025] During use, when the hydraulic emulsion enters from PA, the liquid pressure pushes the first valve core 1.2 to move rightward, opening the sealing surface of the first valve core 1.2 of the first one-way valve series 1 installed between the first valve seat 1.1, and the liquid flows out from the return liquid chamber through hole A to the rod chamber of the column jack N, causing it to lower the column; at the same time, the hydraulic emulsion at the PA port enters the second accommodating chamber 2.6 of the second one-way valve series through the second damping channel 2.5, and a hydraulic force is generated at the second accommodating chamber, which is superimposed with the spring force, so that the pressure of the second accommodating chamber 2.6 is greater than the liquid inlet chamber on the right side of the second valve core 2.2, thereby ensuring that the second valve core 2.2 is in a sealed state, and the push jack M connected to the liquid inlet chamber of the second one-way valve series 2 is always in a locked state.

[0026] The emulsion in the hydraulic pump enters from PB. The principle is the same as above. The liquid pressure pushes the second valve core 2.2 to move leftward, opening the sealing surface of the second valve core 2.2 of the second one-way valve series 2 installed between the second valve seat 2.1. The liquid flows out from the return liquid chamber through hole B and flows to the rodless chamber of the push jack M to lower it. At the same time, the hydraulic emulsion at the PB port passes through the first damping channel 1.5 and enters the first accommodating chamber 1.6 of the first one-way valve series 1. A hydraulic force is generated in the first accommodating chamber 1.6, which is superimposed with the spring force, so that the pressure in the spring chamber is greater than the left liquid inlet chamber of the first valve core 1.2, thereby ensuring that the first valve core 1.2 is in a sealed state, and the column jack N connected to the liquid inlet chamber of the first one-way valve series 1 is always in a locked state.

[0027] It should be noted that, in the description of the present invention, terms indicating orientation or positional relationships, such as "front", "rear", "left", "right", "vertical", "horizontal", "inside", "outside", etc., are based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

Claims

1. An interlocking valve for a hydraulic support, comprising a valve body, characterized in that: A first one-way valve series is arranged in the valve body, comprising a first valve seat and a first end plug arranged opposite thereto, a first liquid inlet and a first return port are provided on the first valve seat, a first valve core for connecting and disconnecting the first liquid inlet and the first return port is arranged in the first valve seat, and a first return spring is arranged in the first accommodating chamber between the first valve core and the first end plug; a second one-way valve series comprises a second valve seat and a second end plug arranged opposite thereto, a second liquid inlet and a second return port are provided on the second valve seat, a second valve core for connecting and disconnecting the second liquid inlet and the second return port is arranged in the second valve seat, and a second return spring is arranged in the second accommodating chamber between the second valve core and the second end plug; wherein the first accommodating chamber is connected with the second liquid inlet through the first damping channel, and the second accommodating chamber is connected with the first liquid inlet through the second damping channel; The first liquid inlet of the first valve seat is connected to the first pipe joint screwed on the valve body, and the first return port of the first valve seat is connected to the first interface pipe opened on the valve body; the second liquid inlet of the second valve seat is connected to the second pipe joint screwed on the valve body, and the second return port of the second valve seat is connected to the second interface pipe opened on the valve body; The first one-way valve series and the second one-way valve series are arranged in parallel, and the first liquid inlet is arranged at the left end of the first valve seat, and the first pipe joint is arranged at the left end of the valve body; the second liquid inlet is arranged at the right end of the second valve seat, and the second pipe joint is arranged at the right end of the valve body; the first reflux port is arranged at the top of the first valve seat, and the first interface pipe extends to the upper end of the valve body; the second reflux port is arranged at the bottom of the second valve seat, and the second interface pipe extends to the lower end of the valve body; The first valve core and the first valve seat, the second valve core and the second valve seat are all conical contact structures.

2. The interlocking valve for a hydraulic support according to claim 1, characterized in that: One end of the first damping channel is connected to the first accommodating chamber, and the other end is connected to the second pipe joint; one end of the second damping channel is connected to the second accommodating chamber, and the other end is connected to the first pipe joint.

3. The interlocking valve for a hydraulic support according to claim 2, characterized in that: The first damping channel and the second damping channel both extend to the outer edge of the valve body, and high-pressure plugging is arranged at the end.

4. The interlocking valve for a hydraulic support according to claim 1, characterized in that: The first accommodating chamber further includes a first positioning groove formed at the opposite surfaces of the first valve core and the first end plug; the second accommodating chamber further includes a second positioning groove formed at the opposite surfaces of the second valve core and the second end plug.

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