An emergency cut-off unloading system and method for coal mine working face and hydraulic support

Abstract

The present invention discloses an emergency shutoff and unloading system and method for high-pressure fluid supply pipelines of coal mine working faces and hydraulic supports, comprising a ground centralized control center, an underground centralized control center, an underground ring network, a controller, an electric-controlled shutoff and unloading valve, and a hydraulic support, wherein the electric-controlled shutoff and unloading valve is composed of an electromagnetic pilot and a shutoff and unloading part, the shutoff and unloading part is connected to the main feed and main return pipelines of the working face, the controller and the centralized control center remotely control the electromagnetic pilot, and the action of the shutoff and unloading part is controlled by the electromagnetic pilot, thereby realizing remote emergency shutoff and unloading of the underground high-pressure fluid supply pipeline. The advantage of the present invention is that it can perform emergency and rapid shutoff and unloading of the main feed circuit of the working face or a single hydraulic support, and can also meet the requirements of remote control of the emergency and rapid shutoff or unloading of the working face and the hydraulic support, is safe and reliable, and is convenient for dealing with emergencies of the mining working face and the hydraulic support. It can also perform main line shutoff and unloading in an emergency of a single hydraulic support, thereby ensuring safety underground in the coal mine.

Description

Technical Field

[0001] The invention relates to a mining working face and a hydraulic support, in particular to an emergency cut-off unloading system and method for a coal mine working face and a hydraulic support. Background Art

[0002] The working environment of coal mines is complex. When emergency shut-off and unloading of the main liquid supply pipeline is required, the current methods, whether shutting down the pump station, closing the shut-off valve or emergency stopping the electro-hydraulic main valve, are unable to efficiently, timely and quickly shut off and unload the high pressure of the main pipeline. This will cause high pressure to remain in some main pipelines, and the unloading is not timely and efficient, posing a huge safety hazard. In order to avoid this situation, an electronically controlled shut-off and unloading system is now used. This system can perform emergency shut-off and unloading of the main pipeline of the working face, or a single or multiple hydraulic supports at any time even when the pump station is started, meeting the requirements of instantaneous, effective and thorough unloading of the high pressure in the main pipeline. It can be operated on-site and remotely controlled at the centralized control center. It is safe and reliable, can fully respond to emergencies on the working face and ensure the safety of the working face. Summary of the Invention

[0003] In response to the above problems, the present invention provides a system and method for remotely controlling the emergency shutoff and rapid unloading of the fluid supply to the coal mine working face and the main pipeline of the hydraulic support.

[0004] The solution adopted by the present invention to solve its technical problems is: an emergency shut-off and unloading system for coal mine working faces and hydraulic supports, including a centralized control center, a controller, a hydraulic support and an electrically controlled shut-off unloading valve. The centralized control center includes a ground centralized control center and an underground centralized control center. The ground centralized control center and the underground centralized control center are connected through a network. The underground centralized control center is connected to the controller. The hydraulic support and the electrically controlled shut-off unloading valve are connected to the controller and are controlled on and off by the controller. A data storage module is also provided on the controller. The electrically controlled shut-off unloading valve is composed of an electromagnetic pilot and a shut-off unloading part. The shut-off unloading part is connected to the main feed and main return pipelines of the working face. The controller and the centralized control center remotely control the electromagnetic pilot, and the action of the shut-off unloading part is controlled by the electromagnetic pilot, thereby realizing remote emergency shut-off and unloading of the underground high-pressure liquid supply pipeline.

[0005] The emergency shut-off unloading system provided by the present invention includes three liquid supply modes, namely annular liquid supply, non-annular liquid supply and liquid supply in the hydraulic support frame; wherein the annular liquid supply shut-off unloading system is provided with an electric-controlled shut-off unloading valve 1 at the front end of the leading hydraulic support or the machine head hydraulic support, and an electric-controlled shut-off unloading valve 2 at the rear end of the machine tail hydraulic support; the controller 1 controls the machine head hydraulic support and the electric-controlled shut-off unloading valve 1, and the controller 2 controls the machine tail hydraulic support and the electric-controlled shut-off unloading valve 2, thereby controlling the liquid supply shut-off and circuit unloading of the entire working surface; the annular liquid supply shut-off unloading system comprises two main inlet pipelines and two main return pipelines, the main inlet pipeline comprises the main inlet pipeline of the machine head hydraulic support and the main inlet pipeline of the machine tail hydraulic support, and the main return pipeline comprises It includes the main return pipeline of the head hydraulic support and the main return pipeline of the tail hydraulic support; a non-annular liquid supply cut-off unloading system, an electrically controlled cut-off unloading valve is installed at the front end of the head hydraulic support, and a controller controls the head hydraulic support and the electrically controlled cut-off unloading valve, thereby controlling the liquid supply cut-off and circuit unloading of the entire working surface; the non-annular liquid supply cut-off unloading system includes the main inlet pipeline of the head hydraulic support and the main return pipeline of the head hydraulic support, or the main inlet pipeline of the tail hydraulic support and the main return pipeline of the tail hydraulic support; a liquid supply cut-off unloading system in the hydraulic support frame, an electrically controlled cut-off unloading valve is installed at the front end of the electro-hydraulic main valve and the rear end of the multi-pass block of each hydraulic support frame on the working surface, and the controller controls the main inlet and return liquid cut-off unloading of a single hydraulic support.

[0006] The annular liquid supply cut-off unloading system and the non-annular liquid supply cut-off unloading system can both coexist and be used with the liquid supply cut-off unloading system within the hydraulic support frame.

[0007] An electro-hydraulic main valve, a hydraulic auxiliary valve, a multi-way block of the frame and a jack are installed in the frame of the hydraulic support.

[0008] An emergency shutoff and unloading method based on an emergency shutoff and unloading system for a high-pressure liquid supply pipeline of a coal mine working face and a hydraulic support, wherein the annular liquid supply shutoff and unloading system has the following steps: the first shutoff unit of an electrically controlled shutoff unloading valve is opened, the unloading unit is closed, the second shutoff unit of an electrically controlled shutoff unloading valve is opened, and the unloading unit is closed, thereby shutting off the liquid supply to the working face; the first shutoff unit of an electrically controlled shutoff unloading valve is opened, and the second shutoff unit of an electrically controlled shutoff unloading valve is opened; the first unloading unit of an electrically controlled shutoff unloading valve is opened, and the second unloading unit of an electrically controlled shutoff unloading valve is opened, thereby unloading the working face;

[0009] The non-annular liquid supply cut-off unloading system, the electric control cut-off unloading valve a cut-off unit is opened, the unloading unit is closed, to realize the liquid supply cut-off of the working surface; the electric control cut-off unloading valve a cut-off unit is opened, the unloading unit is opened, to realize the unloading of the working surface;

[0010] The hydraulic support frame internal liquid supply cut-off unloading system, the electronically controlled cut-off unloading valve cut-off unit is opened, the unloading unit is closed, the hydraulic support main liquid inlet is cut off; the electronically controlled cut-off unloading valve cut-off unit is opened, the unloading unit is opened, the electro-hydraulic main valve is closed, the hydraulic support main liquid return is unloaded.

[0011] The beneficial effects of the present invention are as follows: The advantage of the present invention is that it can perform emergency and rapid cut-off and unloading of the main inlet circuit of the working face or a single hydraulic support, and can also meet the requirements of remote control of the working face and the hydraulic support for emergency and rapid cut-off or unloading. It is safe and reliable, and convenient for dealing with emergencies of mining working faces and hydraulic supports. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a working face flow chart of the annular working face emergency electric-controlled cut-off unloading system of the present invention.

[0013] Figure 2 This is a working face flow chart of the emergency electric-controlled cut-off unloading system for the non-annular working face of the present invention.

[0014] Figure 3 This is a flow chart of the emergency electric-controlled cut-off unloading system in the hydraulic support frame of the present invention.

[0015] Figure 4 It is a functional diagram of the electrically controlled shut-off unloading valve of the present invention.

[0016] Figure 5 It is a schematic diagram of the cut-off state of the annular liquid supply electrically controlled cut-off unloading valve of the present invention.

[0017] Figure 6 It is a schematic diagram of the cut-off and unloading state of the annular liquid supply electrically controlled cut-off and unloading valve according to the present invention.

[0018] Figure 7 It is a schematic diagram of the cut-off and unloading state of the in-frame liquid supply electrically controlled cut-off and unloading valve according to the present invention.

[0019] Figure 8 It is a schematic diagram of the in-rack liquid supply electronically controlled cut-off and unloading cut-off state according to the present invention. Implementation Method

[0020] Example 1: The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort shall fall within the scope of protection of the present invention.

[0021] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0022] In addition, the phrases "and / or / and" appearing throughout the text include three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that satisfies both A and B. Furthermore, the technical solutions of various embodiments may be combined with each other, but only if they are achievable by persons of ordinary skill in the art. If a combination of technical solutions contradicts or cannot be implemented, it shall be deemed that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0023] like Figure 1 As shown, the emergency shut-off and unloading system for coal mine working face and hydraulic support described in the present invention includes: an electrically controlled shut-off unloading valve, which is composed of an electromagnetic pilot part and a shut-off unloading part; the shut-off unloading part is composed of two functional units, a shut-off unit and an unloading unit; the shut-off unit, whose interface is connected to the main liquid inlet of the working face, and the shut-off function is controlled on / off by the electromagnetic pilot valve; the unloading unit, whose interface is connected to the main liquid return port of the working face, and the unloading function is controlled on / off by the electromagnetic pilot valve; a hydraulic support, which contains an electro-hydraulic main valve, a hydraulic auxiliary valve, a multi-way block of the frame, and a jack for supporting coal mining in underground mines; a controller for Control the on / off action of the electro-hydraulic main valve, control the on / off power of the electromagnetic pilot part of the electric-controlled shut-off unloading valve, control the shut-off / unloading action, and store relevant data; the downhole centralized control center is a centralized control platform for controlling the downhole controller; the ground centralized control center is a centralized control platform for controlling the downhole network; the control methods of the electric-controlled shut-off unloading valve are manual control and electric control; manual control, that is, manual button electromagnetic pilot; electric control, that is, any of the three controllers, downhole centralized control center, and ground centralized control center are remotely controlled through the downhole network; the installation positions of the electric-controlled shut-off unloading valve are, the front end of the advance hydraulic support or the head hydraulic support, inside the hydraulic support frame, and the rear end of the tail hydraulic support.

[0024] The ground centralized control center and the underground centralized control center are connected through a network. The underground centralized control center is connected to the controller. The hydraulic support and the electric control stop unloading valve are connected to the controller and are controlled by the controller. The controller is also provided with a data storage module. Figure 4 As shown in the figure, the electric control stop unloading valve consists of an electromagnetic pilot and a stop unloading part. The stop unloading part is connected to the main feed and main return pipelines of the working face. The controller and the centralized control center remotely control the electromagnetic pilot, and the action of the stop unloading part is controlled by the electromagnetic pilot, thereby realizing remote emergency shutoff and unloading of the underground high-pressure liquid supply pipeline.

[0025] The emergency cut-off unloading system provided by the present invention includes three modes: Figure 1 The annular liquid supply cut-off unloading system, the non-annular liquid supply cut-off unloading system, and the liquid supply cut-off unloading system in the hydraulic support frame are shown; the annular liquid supply cut-off unloading system, the electric control cut-off unloading valve 1 is installed at the front end of the advance hydraulic support or the head hydraulic support, and the electric control cut-off unloading valve 2 is installed at the rear end of the tail hydraulic support; the controller 1 controls the head hydraulic support and the electric control cut-off unloading valve 1, and the controller 2 controls the tail hydraulic support and the electric control cut-off unloading valve 2, thereby controlling the liquid supply cut-off and circuit unloading of the entire working surface; the annular liquid supply cut-off unloading system includes the main inlet pipeline of the head hydraulic support, the main inlet pipeline of the tail hydraulic support; and the main return pipeline of the head hydraulic support, and the main return pipeline of the tail hydraulic support.

[0026] like Figure 2 The non-annular liquid supply cut-off unloading system shown in the figure has an electrically controlled cut-off unloading valve installed at the front end of the machine head hydraulic support, and a controller controls the machine head hydraulic support and the electrically controlled cut-off unloading valve, thereby controlling the liquid supply cut-off and circuit unloading of the entire working surface; the non-annular liquid supply cut-off unloading system includes the main inlet pipeline of the machine head hydraulic support and the main return pipeline of the machine head hydraulic support; or the main inlet pipeline of the machine tail hydraulic support and the main return pipeline of the machine tail hydraulic support.

[0027] like Figure 3 As shown, the hydraulic support frame has a liquid supply cut-off unloading system, and the electric-controlled cut-off unloading valve is installed in each hydraulic support frame on the working surface, at the front end of the electro-hydraulic main valve and the rear end of the multi-pass block of the frame. The controller controls the main inlet and return liquid cut-off unloading of a single hydraulic support.

[0028] The annular liquid supply cut-off unloading system can coexist with the hydraulic support frame liquid supply cut-off unloading system, or be used alone; the non-annular liquid supply cut-off unloading system can coexist with the hydraulic support frame liquid supply cut-off unloading system, or be used alone.

[0029] The method for realizing the emergency cut-off unloading of the coal mine working face and the hydraulic support of the present invention is as follows: Figure 5 and 6 As shown, in the annular liquid supply cut-off unloading system, the cut-off unit of the electric-controlled cut-off unloading valve 1 is opened, the unloading unit is closed, the cut-off unit of the electric-controlled cut-off unloading valve 2 is opened, and the unloading unit is closed, so as to realize the cut-off of the liquid supply to the working face; the cut-off unit of the electric-controlled cut-off unloading valve 1 is opened, and the cut-off unit of the electric-controlled cut-off unloading valve 2 is opened; the unloading unit of the electric-controlled cut-off unloading valve 1 is opened, and the unloading unit of the electric-controlled cut-off unloading valve 2 is opened to realize unloading of the working face.

[0030] In the non-annular liquid supply cut-off unloading system, the cut-off unit of the electrically controlled cut-off unloading valve is opened and the unloading unit is closed to realize the cut-off of the liquid supply to the working face; the cut-off unit of the electrically controlled cut-off unloading valve is opened and the unloading unit is opened to realize the unloading of the working face.

[0031] like Figure 7 and 8 As shown, the hydraulic support frame internal liquid supply cut-off unloading system, the electronically controlled cut-off unloading valve cut-off unit is opened, the unloading unit is closed, and the main liquid inlet of the hydraulic support is cut off; the electronically controlled cut-off unloading valve cut-off unit is opened, the unloading unit is opened, the electro-hydraulic main valve is closed, and the main return liquid of the hydraulic support is unloaded.

[0032] The above describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely describe the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications fall within the scope of the invention as claimed.

Claims

1. An emergency cut-off unloading system for coal mine working face and hydraulic support, characterized in that: It includes a centralized control center, a controller, a hydraulic support and an electrically controlled shut-off unloading valve. The centralized control center includes a ground centralized control center and an underground centralized control center. The ground centralized control center and the underground centralized control center are connected through a network. The underground centralized control center is connected to the controller. The hydraulic support and the electrically controlled shut-off unloading valve are connected to the controller and are controlled on and off by the controller. The controller is also provided with a data storage module. The electric-controlled shut-off unloading valve consists of an electromagnetic pilot and a shut-off unloading part. The shut-off unloading part is connected to the main feed and return pipelines of the working face. The controller and the centralized control center remotely control the electromagnetic pilot, which controls the action of the shut-off unloading part, thereby achieving remote emergency shut-off and unloading of the underground high-pressure fluid supply pipeline. The system includes three fluid supply modes: annular fluid supply, non-annular fluid supply and fluid supply inside the hydraulic support frame; The annular liquid supply cut-off unloading system includes an electrically controlled cut-off unloading valve 1 installed at the front end of the leading hydraulic support or the head hydraulic support, and an electrically controlled cut-off unloading valve 2 installed at the rear end of the tail hydraulic support; the controller 1 controls the head hydraulic support and the electrically controlled cut-off unloading valve 1, and the controller 2 controls the tail hydraulic support and the electrically controlled cut-off unloading valve 2, thereby controlling the liquid supply cut-off and circuit unloading of the entire working surface; the annular liquid supply cut-off unloading system includes two main inlet pipelines and two main return pipelines, the main inlet pipeline includes the main inlet pipeline of the head hydraulic support and the main inlet pipeline of the tail hydraulic support, and the main return pipeline includes the main return pipeline of the head hydraulic support and the main return pipeline of the tail hydraulic support; A non-annular liquid supply cut-off unloading system, wherein an electrically controlled cut-off unloading valve is installed at the front end of the machine head hydraulic support, and a controller controls the machine head hydraulic support and the electrically controlled cut-off unloading valve, thereby controlling the liquid supply cut-off and circuit unloading of the entire working surface; the non-annular liquid supply cut-off unloading system comprises a main inlet pipeline and a main return pipeline of the machine head hydraulic support, or a main inlet pipeline and a main return pipeline of the tail hydraulic support; The hydraulic support frame has a liquid supply cut-off unloading system. The electric control cut-off unloading valve is installed at the front end of the electro-hydraulic main valve and the rear end of the multi-pass block of each hydraulic support frame on the working surface. The controller controls the main supply and return liquid cut-off unloading of a single hydraulic support. The annular liquid supply cut-off unloading system and the non-annular liquid supply cut-off unloading system can both coexist and be used with the liquid supply cut-off unloading system within the hydraulic support frame.

2. The emergency cut-off unloading system for coal mine working face and hydraulic support according to claim 1, characterized in that: An electro-hydraulic main valve, a hydraulic auxiliary valve, a multi-way block of the frame and a jack are installed in the frame of the hydraulic support.

3. An emergency cut-off unloading method based on the emergency cut-off unloading system for coal mine working face and hydraulic support according to claim 1 or 2, characterized in that: The annular liquid supply cut-off unloading system, the electric control cut-off unloading valve first cut-off unit is opened, the unloading unit is closed, the electric control cut-off unloading valve second cut-off unit is opened, the unloading unit is closed, to realize the liquid supply cut-off of the working surface; the electric control cut-off unloading valve first cut-off unit is opened, the electric control cut-off unloading valve second cut-off unit is opened; the electric control cut-off unloading valve first unloading unit is opened, the electric control cut-off unloading valve second unloading unit is opened, to realize the unloading of the working surface; The non-annular liquid supply cut-off unloading system, the electric control cut-off unloading valve a cut-off unit is opened, the unloading unit is closed, to realize the liquid supply cut-off of the working surface; the electric control cut-off unloading valve a cut-off unit is opened, the unloading unit is opened, to realize the unloading of the working surface; The hydraulic support frame internal liquid supply cut-off unloading system, the electronically controlled cut-off unloading valve cut-off unit is opened, the unloading unit is closed, the hydraulic support main liquid inlet is cut off; the electronically controlled cut-off unloading valve cut-off unit is opened, the unloading unit is opened, the electro-hydraulic main valve is closed, the hydraulic support main liquid return is unloaded.

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