A mining frame moving speed-up system

Abstract

The present invention belongs to the field of machinery, and specifically relates to a mining frame speed-up system, which includes a controller, an electro-hydraulic valve group, a push jack, a left column, and a right column. The hydraulic lines of the push jack, the left column, and the right column are correspondingly connected to the inlet and outlet liquid connection ports of the electro-hydraulic valve group. The controller is electrically connected to the electro-hydraulic valve group. The system also includes a large liquid inlet line and a large liquid return line. The large liquid inlet line is respectively connected to the liquid inlets of the hydraulic lines of the push jack, the left column, and the right column, and the large liquid return line is connected to the liquid return port of the large liquid inlet line. The present invention adds large liquid inlet lines and large liquid return lines on the existing basis, which can directly and effectively improve the liquid inlet and return speed of the column and push.

Description

Technical Field

[0001] The invention belongs to the field of machinery, and in particular relates to a mining frame moving and speed-increasing system. Background Art

[0002] Currently, there are three methods for rapid hydraulic support rack movement: one is to use a high-flow rapid rack movement system. The second is to use segmented simultaneous rack movement. The third is to use an electro-hydraulic control system. The segmented simultaneous rack movement of the second method is not possible with an electro-hydraulic control system. Currently, we are combining an electro-hydraulic control system with a high-flow rapid rack movement system. Of course, this requires ensuring the flow rate of the emulsion pump for effective implementation.

[0003] The hydraulic support must be moved quickly to match the speed of the shearer's traction, while also ensuring reliable support of the roof. These two factors are contradictory, so rapid frame movement must be based on ensuring the initial support force of the support, otherwise it is meaningless.

[0004] Currently, methods for ensuring initial support force during rapid rack transfer include: installing an initial support force-maintaining valve in the rack lifting system; and, after a rack is lifted, not resetting the solenoid pilot valve and continuing to operate, but rather moving to the next rack and then resetting it after a period of time. However, both methods share the disadvantages of a drop in system pressure, which can take a long time to reach initial support force. Furthermore, since multiple racks are connected to the main liquid inlet pipeline, any leak could affect other racks. Summary of the Invention

[0005] In order to solve the above problems, the present invention discloses a mining frame speed-up system, which adds a large liquid inlet pipeline and a large liquid return pipeline on the existing basis, which can directly and effectively increase the liquid inlet and return speed of the column and pusher.

[0006] A mining frame speed-up system includes a controller, an electro-hydraulic valve group, a pushing jack, a left column and a right column. The hydraulic pipelines of the pushing jack, the left column and the right column are correspondingly connected to the inlet and outlet liquid connection ports of the electro-hydraulic valve group. The controller is electrically connected to the electro-hydraulic valve group. The system also includes a large liquid inlet pipeline and a large liquid return pipeline. The large liquid inlet pipeline is respectively connected to the liquid inlets of the hydraulic pipelines of the pushing jack, the left column and the right column, and the large liquid return pipeline is connected to the return liquid port of the large liquid inlet pipeline.

[0007] Preferably, the large liquid inlet pipeline includes a first automatic backwash filter, a push large flow inlet and return valve, a left control valve, a left large flow inlet and return valve, a right control valve and a right large flow inlet and return valve. The working port of the push large flow inlet and return valve is connected to the rodless cavity of the push jack, the left control valve is connected to the rodless cavity of the left column, the liquid inlet of the left control valve is connected to the working port of the left large flow inlet and return valve, the right control valve is connected to the rodless cavity of the right column, the liquid inlet of the right control valve is connected to the working port of the right large flow inlet and return valve, and the liquid outlet of the first automatic backwash filter is respectively connected to the liquid inlet of the push large flow inlet and return valve, the liquid inlet of the left large flow inlet and return valve and the liquid inlet of the right large flow inlet and return valve.

[0008] Preferably, the large liquid inlet pipeline includes a main liquid inlet pipeline, a first-level liquid inlet pipeline and a second-level liquid inlet pipeline, one end of the first-level liquid inlet pipeline is connected to the main liquid inlet pipeline, and the other end is connected to the first automatic backwash filter, one end of the second-level liquid inlet pipeline is connected to the main liquid inlet pipeline, and the other end is connected to the liquid inlet of the electro-hydraulic valve group through the second automatic backwash filter.

[0009] Preferably, the large return liquid pipeline includes a main return liquid pipeline, a first secondary return liquid pipeline and a second secondary return liquid pipeline, one end of the first secondary return liquid pipeline is connected to the main return liquid pipeline, and the other end is respectively connected to the return liquid port of the push large flow inlet and return valve and the return liquid port of the electro-hydraulic valve group, one end of the second secondary return liquid pipeline is connected to the main return liquid pipeline, and the other end is respectively connected to the return liquid port of the left large flow inlet and return valve and the return liquid port of the right large flow inlet and return valve;

[0010] When using, it is divided into three steps:

[0011] Step 1: The controller is turned to the column lowering position. The hydraulic oil of the left column will pass through the rodless cavity of the left column, the left control valve, the left high-flow inlet and return valve, and the second secondary return liquid pipeline to return to the main return liquid pipeline; at the same time, the hydraulic oil of the right column will pass through the rodless cavity of the right column, the right control valve, the right high-flow inlet and return valve, and the second secondary return liquid pipeline to return to the main return liquid pipeline, and the left and right columns will descend rapidly.

[0012] Step 2: The controller is turned to the pulling position, and the hydraulic oil in the main liquid inlet pipeline will flow through the first secondary liquid inlet pipeline, the first automatic backwash filter, and the push large flow inlet and return valve into the rodless chamber of the push jack to push out the hydraulic rod of the push jack; the controller is turned to the pushing position, and the hydraulic oil of the push jack will return to the main liquid return pipeline through the push large flow inlet and return valve and the first secondary liquid return pipeline;

[0013] Step 3: Turn the controller to the column raising position, and the hydraulic oil in the main liquid inlet pipeline will pass through the first secondary liquid inlet pipeline and the first automatic backwash filter and then be divided into two paths. The first path passes through the left large-flow inlet and return valve and the left control valve and flows into the rodless chamber of the left column to push out the hydraulic rod of the left column. The second path passes through the right large-flow inlet and return valve and the right control valve and flows into the rodless chamber of the right column to push out the hydraulic rod of the right column. The left column and the right column will rise rapidly.

[0014] Preferably, a first liquid return circuit breaker valve is installed on the first secondary liquid return pipeline.

[0015] Preferably, a second liquid return circuit breaker valve is installed on the second secondary liquid return pipeline.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This system of the present invention mainly solves the problem of increasing the speed of hydraulic supports. With the rapid development of intelligent fully mechanized mining working faces, the speed of hydraulic supports following the machine is a key factor affecting intelligent coal mining. To solve the problem of the speed of the supports following the machine, the system is optimized and modified based on the principle of the hydraulic support fluid circuit system. The two key inlet and outlet positions of the original hydraulic system columns and pushers are modified. A fast liquid inlet and return system is installed on the original system to increase the speed of the hydraulic support. This system does not affect the original hydraulic system, but only "expands" the original system. On the basis of the existing system, the present invention adds large liquid inlet and return pipelines, which can directly and effectively increase the liquid inlet and return speed of the columns and pushers. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 This is a diagram of the bracket electro-hydraulic control system of the present invention. DETAILED DESCRIPTION

[0020] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0021] In order to enable those skilled in the art to better understand the present invention, the following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0022] like Figure 1 As shown, a mining frame speed-up system includes a controller, an electro-hydraulic valve group, a pushing jack, a left column and a right column. The hydraulic pipelines of the pushing jack, the left column and the right column are correspondingly connected to the inlet and outlet liquid connection ports of the electro-hydraulic valve group. The controller is electrically connected to the electro-hydraulic valve group. The system also includes a large liquid inlet pipeline and a large liquid return pipeline. The large liquid inlet pipeline is respectively connected to the liquid inlets of the hydraulic pipelines of the pushing jack, the left column and the right column, and the large liquid return pipeline is connected to the return liquid port of the large liquid inlet pipeline.

[0023] The large liquid inlet pipeline includes a first automatic backwash filter, a push large flow inlet and return valve, a left control valve, a left large flow inlet and return valve, a right control valve and a right large flow inlet and return valve. The working port of the push large flow inlet and return valve is connected to the rodless cavity of the push jack, the left control valve is connected to the rodless cavity of the left column, the liquid inlet of the left control valve is connected to the working port of the left large flow inlet and return valve, the right control valve is connected to the rodless cavity of the right column, the liquid inlet of the right control valve is connected to the working port of the right large flow inlet and return valve, and the liquid outlet of the first automatic backwash filter is respectively connected to the liquid inlet of the push large flow inlet and return valve, the liquid inlet of the left large flow inlet and return valve and the liquid inlet of the right large flow inlet and return valve.

[0024] The large liquid inlet pipeline includes a main liquid inlet pipeline, a first-level liquid inlet pipeline and a second-level liquid inlet pipeline. One end of the first-level liquid inlet pipeline is connected to the main liquid inlet pipeline, and the other end is connected to the first automatic backwash filter. One end of the second-level liquid inlet pipeline is connected to the main liquid inlet pipeline, and the other end is connected to the liquid inlet of the electro-hydraulic valve group through the second automatic backwash filter.

[0025] The large return liquid pipeline includes a main return liquid pipeline, a first secondary return liquid pipeline and a second secondary return liquid pipeline, one end of the first secondary return liquid pipeline is connected to the main return liquid pipeline, and the other end is respectively connected to the return liquid port of the push large flow inlet and return valve and the return liquid port of the electro-hydraulic valve group, one end of the second secondary return liquid pipeline is connected to the main return liquid pipeline, and the other end is respectively connected to the return liquid port of the left large flow inlet and return valve and the return liquid port of the right large flow inlet and return valve;

[0026] When using, it is divided into three steps:

[0027] Step 1: The controller is turned to the column lowering position. The hydraulic oil of the left column will pass through the rodless cavity of the left column, the left control valve, the left high-flow inlet and return valve, and the second secondary return liquid pipeline to return to the main return liquid pipeline; at the same time, the hydraulic oil of the right column will pass through the rodless cavity of the right column, the right control valve, the right high-flow inlet and return valve, and the second secondary return liquid pipeline to return to the main return liquid pipeline, and the left and right columns will descend rapidly.

[0028] Step 2: The controller is turned to the pulling position, and the hydraulic oil in the main liquid inlet pipeline will flow through the first secondary liquid inlet pipeline, the first automatic backwash filter, and the push large flow inlet and return valve into the rodless chamber of the push jack to push out the hydraulic rod of the push jack; the controller is turned to the pushing position, and the hydraulic oil of the push jack will return to the main liquid return pipeline through the push large flow inlet and return valve and the first secondary liquid return pipeline;

[0029] Step 3: Turn the controller to the column raising position, and the hydraulic oil in the main liquid inlet pipeline will pass through the first secondary liquid inlet pipeline and the first automatic backwash filter and then be divided into two paths. The first path passes through the left large-flow inlet and return valve and the left control valve and flows into the rodless chamber of the left column to push out the hydraulic rod of the left column. The second path passes through the right large-flow inlet and return valve and the right control valve and flows into the rodless chamber of the right column to push out the hydraulic rod of the right column. The left column and the right column will rise rapidly.

[0030] A first liquid return circuit breaker valve is installed on the first secondary liquid return pipeline. A second liquid return circuit breaker valve is installed on the second secondary liquid return pipeline.

[0031] Of course, when in use, the original hydraulic pipeline also moves synchronously. The core of the present invention is to expand the pipeline capacity by adding a large liquid inlet pipeline and a large liquid return pipeline, which can directly and effectively improve the liquid inlet and return speed of the column and push.

[0032] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, improvements, component splits, or combinations, etc., that fall within the spirit and principles of the present invention, shall be included within the scope of protection of the present invention.

Claims

1. A mining frame speed-up system, comprising a controller, an electro-hydraulic valve group, a push jack, a left column, and a right column, wherein the hydraulic lines of the push jack, the left column, and the right column are correspondingly connected to the inlet and outlet liquid connection ports of the electro-hydraulic valve group, and the controller is electrically connected to the electro-hydraulic valve group, characterized in that: The system also includes a large liquid inlet pipeline and a large liquid return pipeline, the large liquid inlet pipeline is respectively connected to the liquid inlets of the hydraulic pipelines of the pushing jack, the left column and the right column, and the large liquid return pipeline is connected to the liquid return port of the large liquid inlet pipeline; the large liquid inlet pipeline includes a first automatic backwash filter, a pushing large flow inlet and return valve, a left control valve, a left large flow inlet and return valve, a right control valve and a right large flow inlet and return valve, and the working port of the pushing large flow inlet and return valve is connected to the rodless The left control valve is connected to the rodless cavity of the left column, the liquid inlet of the left control valve is connected to the working port of the left large flow inlet and return valve, the right control valve is connected to the rodless cavity of the right column, the liquid inlet of the right control valve is connected to the working port of the right large flow inlet and return valve, and the liquid outlet of the first automatic backwash filter is respectively connected to the liquid inlet of the push large flow inlet and return valve, the liquid inlet of the left large flow inlet and return valve and the liquid inlet of the right large flow inlet and return valve; The large liquid inlet pipeline includes a main liquid inlet pipeline, a first-level liquid inlet pipeline and a second-level liquid inlet pipeline, one end of the first-level liquid inlet pipeline is connected to the main liquid inlet pipeline, and the other end is connected to the first automatic backwash filter, one end of the second-level liquid inlet pipeline is connected to the main liquid inlet pipeline, and the other end is connected to the liquid inlet of the electro-hydraulic valve group through the second automatic backwash filter; the large return liquid pipeline includes a main return liquid pipeline, a first-level liquid return liquid pipeline and a second-level liquid return liquid pipeline, one end of the first-level liquid return pipeline is connected to the main return liquid pipeline, and the other end is respectively connected to the return liquid port of the push large-flow inlet and return valve and the return liquid port of the electro-hydraulic valve group, one end of the second-level liquid return pipeline is connected to the main return liquid pipeline, and the other end is respectively connected to the return liquid port of the left large-flow inlet and return valve and the return liquid port of the right large-flow inlet and return valve.

2. A mining frame moving and speed-up system according to claim 1, characterized in that: When using, it is divided into three steps: Step 1: The controller is turned to the column lowering position. The hydraulic oil of the left column will pass through the rodless cavity of the left column, the left control valve, the left high-flow inlet and return valve, and the second secondary return liquid pipeline to return to the main return liquid pipeline; at the same time, the hydraulic oil of the right column will pass through the rodless cavity of the right column, the right control valve, the right high-flow inlet and return valve, and the second secondary return liquid pipeline to return to the main return liquid pipeline, and the left and right columns will descend rapidly. Step 2: The controller is turned to the pulling position, and the hydraulic oil in the main liquid inlet pipeline will flow through the first secondary liquid inlet pipeline, the first automatic backwash filter, and the push large flow inlet and return valve into the rodless chamber of the push jack to push out the hydraulic rod of the push jack; the controller is turned to the pushing position, and the hydraulic oil of the push jack will return to the main liquid return pipeline through the push large flow inlet and return valve and the first secondary liquid return pipeline; Step 3: Turn the controller to the column raising position, and the hydraulic oil in the main liquid inlet pipeline will pass through the first secondary liquid inlet pipeline and the first automatic backwash filter and then be divided into two paths. The first path passes through the left large-flow inlet and return valve and the left control valve and flows into the rodless chamber of the left column to push out the hydraulic rod of the left column. The second path passes through the right large-flow inlet and return valve and the right control valve and flows into the rodless chamber of the right column to push out the hydraulic rod of the right column. The left column and the right column will rise rapidly.

3. A mining frame moving and speed-up system according to claim 2, characterized in that: A first liquid return circuit breaker valve is installed on the first secondary liquid return pipeline.

4. A mining frame moving and speed-up system according to claim 3, characterized in that: A second liquid return circuit breaker valve is installed on the second secondary liquid return pipeline.

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