Downhole movable gas analysis device

Abstract

The invention discloses an underground movable gas analysis device, which belongs to the technical field of coal mine underground gas analysis and comprises a gas detection device, a communication device, a main control device, a power supply, a gas circuit control device, a sucking pump and a flat mine car. The gas detection device, the communication device, the main control device, the power supply, the gas circuit control device and the sucking pump are all mounted on the flat mine car; the power supply is respectively connected with the gas detection device, the communication device, the main control device and the gas path control device; the gas detection device and the main control device are both connected with the communication device, the main control device is further connected with the gas path control device, the gas path control device is connected with the sucking pump, and the sucking pump is connected with the gas detection device. The device integrates the functions of gas detection, automatic gas path switching, data communication and transmission, gas sampling and the like, can be mounted near a coal face, greatly shortens the sampling distance, is convenient to maintain, and improves the real-time performance and precision of gas analysis.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine underground gas analysis, and in particular relates to an underground movable gas analysis device. Background Art

[0002] In the process of coal mining, it is crucial to provide technical support for the safe production of coal mines. To this end, it is necessary to monitor the concentration of gas components in the coal mining face and goaf in real time to prevent accidents such as gas explosions and fires. At present, traditional gas analysis methods mainly use remote sampling by laying bundle pipes and sending samples to ground laboratories for analysis. However, this method has the following problems:

[0003] (1) Long sampling distance: Due to the long sampling distance, usually more than 1000 meters, the data transmission time is long;

[0004] (2) Difficult maintenance: Due to the long pipeline, it is easy to have problems such as leakage or blockage, which increases the difficulty of maintenance;

[0005] (3) Data delay and error: Due to the long sampling distance and inadequate pipeline maintenance, the real-time performance of the analysis data is poor, and the analysis results may have large errors, which is not conducive to the development of coal mine safety production work.

[0006] The existence of the above problems not only affects the accuracy of gas analysis, but also increases the complexity and risk of mine safety management; therefore, it is particularly important to develop an underground mobile gas analysis device that can improve the efficiency and accuracy of gas analysis to solve the above problems. Summary of the invention

[0007] The present invention aims at the above-mentioned problems, makes up for the deficiencies of the prior art, and provides a movable underground gas analysis device.

[0008] To achieve the above purpose, the present invention adopts the following technical solution.

[0009] The present invention provides an underground movable gas analysis device, comprising a gas detection device, a communication device, a main control device, a power supply, a gas circuit control device, an air pump and a flatbed mining car, wherein the gas detection device, the communication device, the main control device, the power supply, the gas circuit control device and the air pump are all installed on the flatbed mining car; the power supply is respectively connected to the gas detection device, the communication device, the main control device and the gas circuit control device, and the power supply provides electric energy for the gas detection device, the communication device, the main control device and the gas circuit control device; the gas detection device and the main control device are both connected to the communication device, the main control device is also connected to the gas circuit control device, the gas circuit control device is connected to the air pump, and the air pump is connected to the gas detection device.

[0010] As a preferred solution of the present invention, the gas detection device includes a signal acquisition board and a sensor group. The signal acquisition board is responsible for signal acquisition and output of the sensor group, and the signal output interface of the signal acquisition board is an RS485 interface.

[0011] As another preferred embodiment of the present invention, the communication device includes an RS485 interface, a network port, and a fiber optic interface. The RS485 interface of the communication device is connected to the RS485 interface of the signal acquisition board through a communication line. The communication device uses a network cable to access the communication network through the network port, or uses an optical fiber to access the network through the fiber optic interface. The communication device is connected to a ground monitoring host.

[0012] As another preferred embodiment of the present invention, the air circuit control device includes a pipeline controller, a stepper motor, and an air circuit connector. One end of the pipeline controller is connected to the stepper motor, and the other end of the pipeline controller is connected to the air circuit connector. The air circuit connector is connected to the vacuum pump, and the stepper motor is respectively connected to the power supply and the main control device.

[0013] As another preferred scheme of the present invention, the pipeline controller includes a pipeline controller main body and a pipeline controller sliding rod. The pipeline controller sliding rod is arranged through the pipeline controller main body. The length of the pipeline controller sliding rod is greater than the pipeline controller main body. The pipeline controller sliding rod is slidably connected to the pipeline controller main body; one end of the pipeline controller sliding rod is connected to the stepper motor and the other end is connected to the air circuit connector. The air inlet of the vacuum pump is connected to the air circuit connector through a pipeline, and the air outlet of the vacuum pump is connected to the gas detection device.

[0014] As another preferred embodiment of the present invention, the pipeline controller body is a circular ring structure, and four gas circuit interfaces are evenly distributed on the pipeline controller body along the same straight line direction, each gas circuit interface is connected to the inside of the pipeline controller body, and sealing rings are equidistantly provided on both sides of each gas circuit interface on the inner side of the pipeline controller body.

[0015] As another preferred scheme of the present invention, the pipeline controller sliding rod is a circular ring structure, and an air circuit interface is arranged in the middle position of the pipeline controller sliding rod, the air circuit interface is communicated with the inside of the pipeline controller sliding rod, and sealing grooves are arranged on both sides of the air circuit interface. The air circuit interface on the pipeline controller sliding rod is the same size as each air circuit interface on the pipeline controller body, and the sealing groove on the pipeline controller sliding rod is used in conjunction with the sealing ring on the pipeline controller body.

[0016] As another preferred solution of the present invention, the pipeline controller body is connected to four gas sampling tubes, and each gas sampling tube is arranged along the lane to a monitoring point.

[0017] As another preferred embodiment of the present invention, the power supply has an input voltage of AC220V / 380V / 660V / 1140V and an output voltage of DC12V; a total of 4 power supplies are output, one of which is for powering the gas detection device, one is for powering the main control device, one is for powering the stepper motor, and one is for powering the communication device, and the power supply current is ≤2A.

[0018] Beneficial effects of the present invention:

[0019] The present invention provides an underground movable gas analysis device, which integrates gas detection, automatic gas path switching, data communication and transmission, gas sampling and other functions. It can be installed near the coal mining face, greatly shortening the sampling distance, facilitating maintenance, and improving the real-time and accuracy of gas analysis. In addition, the device can move with the movement of the working face support, without the need for special personnel to operate, which significantly reduces the labor intensity of workers. The device is mainly used for real-time monitoring and analysis of the concentration of gas components in the coal mining face and goaf during coal seam mining, providing technical support for safe production in coal mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 The present invention is a schematic structural diagram of a movable underground gas analysis device.

[0022] Figure 2 The present invention is a schematic diagram of the three-dimensional structure of a pipeline controller of a movable underground gas analysis device.

[0023] Figure 3 The present invention is a schematic diagram of the internal structure of a pipeline controller body of a movable underground gas analysis device.

[0024] Figure 4 The present invention is a schematic diagram of the three-dimensional structure of a pipeline controller sliding rod of a movable underground gas analysis device.

[0025] Figure 5 The present invention is a schematic diagram of the internal structure of a pipeline controller sliding rod of a movable underground gas analysis device.

[0026] Markings in the figure: 1 is a gas detection device, 2 is a communication device, 3 is a main control device, 4 is a power supply, 5 is a gas circuit control device, 6 is a vacuum pump, and 7 is a ground monitoring host; 101 is a signal acquisition board, 102 is a sensor group; 501 is a pipeline controller, 502 is a stepper motor, 503 is a gas circuit connector, 5011 is a pipeline controller body, 5012 is a pipeline controller sliding rod, 5013 is a sealing ring, 5014 is a sealing groove, and 5015 is a gas sampling tube. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] like Figures 1 to 5 As shown, an underground mobile gas analysis device provided by an embodiment of the present invention comprises a gas detection device 1, a communication device 2, a main control device 3, a power supply 4, a gas circuit control device 5, an air pump 6 and a flatbed mine car, wherein the gas detection device 1, the communication device 2, the main control device 3, the power supply 4, the gas circuit control device 5, and the air pump 6 are all installed on the flatbed mine car; the gas detection device 1, the communication device 2, the main control device 3, the power supply 4, the gas circuit control device 5, and the air pump 6 of the underground mobile gas analysis device described in the present invention are integrally installed on the flatbed mine car, and can conveniently move with the coal mining machine. Among them, the gas detection device 1, the communication device 2, the main control device 3, the power supply 4, the gas circuit control device 5, and the air pump 6 are all fixed on the flatbed mine car to ensure the integrated operation of the entire system. The flatbed mine car is placed on the rails and can move with the movement of the coal mining machine without the need for special personnel to operate. The power supply 4 is respectively connected to the gas detection device 1, the communication device 2, the main control device 3, and the gas circuit control device 5, and the power supply 4 provides electrical energy for the gas detection device 1, the communication device 2, the main control device 3, and the gas circuit control device 5; the gas detection device 1 and the main control device 3 are both connected to the communication device 2, the main control device 3 is also connected to the gas circuit control device 5, the gas circuit control device 5 is connected to the air pump 6, and the air pump 6 is connected to the gas detection device 1.

[0029] The gas detection device 1 includes a signal acquisition board 101 and a sensor group 102. The signal acquisition board 101 is responsible for signal acquisition and output of the sensor group 102. The signal output interface of the signal acquisition board 101 is an RS485 interface.

[0030] The communication device 2 includes an RS485 interface, a network port, and a fiber optic interface. The RS485 interface of the communication device 2 is connected to the RS485 interface of the signal acquisition board via a communication line. The communication device 2 uses a network cable to access the communication network through the network port, or uses an optical fiber to access the network through the fiber optic interface. The communication device 2 is connected to a ground monitoring host 7.

[0031] The communication device 2 is a key link between the ground monitoring host 7 and the underground mobile gas analysis device, and supports multiple communication protocols, including RS485 interface, network port, and optical fiber interface, which can realize Ethernet and optical fiber communication; this method not only speeds up the data transmission speed, but also enhances the adaptability and stability of the system. When the analysis is completed, the data is first converted into a standard format, and then sent to the ground monitoring host 7 through the selected communication method for further processing and decision-making.

[0032] The gas circuit control device 5 includes a pipeline controller 501, a stepper motor 502, and an air circuit connector 503. One end of the pipeline controller 501 is connected to the stepper motor 502, and the other end of the pipeline controller 501 is connected to the air circuit connector 503. The air circuit connector 503 is connected to the air pump 6, and the stepper motor 502 is respectively connected to the power supply 4 and the main control device 3. The pipeline controller 501 includes a pipeline controller body 5011 and a pipeline controller sliding rod 5012. The pipeline controller sliding rod 5012 is set in the pipeline controller body 5011, and the length of the pipeline controller sliding rod 5012 is greater than that of the pipeline controller body 5011. The pipeline controller sliding rod 5012 is slidably connected to the pipeline controller body 5011; one end of the pipeline controller sliding rod 5012 is connected to the stepping motor 502, and the other end is connected to the gas circuit connector 503. The air inlet of the air pump 6 is connected to the gas circuit connector 503 through a pipeline, and the air outlet of the air pump 6 is connected to the gas detection device 1. The pipeline controller body 5011 is a torus structure, and 4 gas circuit interfaces are evenly distributed on the pipeline controller body 5011 along the same straight line direction, each gas circuit interface is connected to the inside of the pipeline controller body 5011, and sealing rings 5013 are equidistantly provided on both sides of each gas circuit interface on the inner side of the pipeline controller body 5011.

[0033] The pipeline controller sliding rod 5012 is a circular ring structure, and an air circuit interface is arranged in the middle position of the pipeline controller sliding rod 5012. The air circuit interface is communicated with the inside of the pipeline controller sliding rod 5012, and sealing grooves 5014 are arranged on both sides of the air circuit interface. The air circuit interface on the pipeline controller sliding rod 5012 is the same size as each air circuit interface on the pipeline controller main body 5011, and the sealing groove 5014 on the pipeline controller sliding rod 5012 is used in conjunction with the sealing ring 5013 on the pipeline controller main body 5011.

[0034] Both ends of the pipeline controller sliding rod 5012 are internal threads, one end is used to be installed with the air circuit connector 503, and the other end is sealed and connected to the stepper motor 502.

[0035] The pipeline controller body 5011 is connected to four gas sampling tubes 5015, and each gas sampling tube 5015 is arranged along the lane to a monitoring point.

[0036] The core of the design of the gas circuit control device 5 described in the present invention lies in the cooperation between the pipeline controller body 5011 and the pipeline controller sliding rod 5012. There are four evenly distributed gas circuit interfaces on the pipeline controller body 5011, each of which is connected to the inside of the pipeline controller body 5011. At the same time, sealing rings 5013 are provided on both sides of each gas circuit interface. The pipeline controller sliding rod 5012 is provided with a sealing groove 5014 used in conjunction with the sealing ring 5013 on the pipeline controller body 5011 to prevent leakage. At the same time, there is only one gas circuit interface on the pipeline controller sliding rod 5012, which can move axially according to the requirements of the control signal and cooperate with the four gas circuit interfaces evenly distributed along the same straight line direction on the pipeline controller body 5011, so as to select different gas circuit interfaces for connection. Such a design not only simplifies the operation of gas circuit switching, but also ensures good sealing performance and avoids gas mixing or leakage.

[0037] The power supply 4 has an input voltage of AC220V / 380V / 660V / 1140V and an output voltage of DC12V; a total of 4 power supplies are output, one for the gas detection device 1, one for the main control device 3, one for the stepper motor 502, and one for the communication device 2, and the power supply current is ≤2A.

[0038] The working principle is explained in combination with the technical solution of the present invention and the accompanying drawings: the analysis control command issued by the ground monitoring host 7 is transmitted to the main control device 3 via the communication device 2, and the main control device 3 transmits the control signal to the stepper motor 502, and the stepper motor 502 is started according to the requirements of the control signal, and the stepper motor 502 controls the pipeline controller sliding rod 5012 to move to the set position, so that the air path interface on the pipeline controller sliding rod 5012 corresponds to a specified air path interface on the pipeline controller main body 5011 set by the ground monitoring host 7; then, the vacuum pump 6 works, and the gas is sent to the sensor group 102 of the gas detection device 1 through the air path connector 503 connected to the pipeline controller sliding rod 5012, and the signal acquisition board 101 transmits the gas component concentration value to the communication device 2; finally, the communication device 2 transmits the concentration value to the ground monitoring host 7.

[0039] In summary, the underground mobile gas analysis device proposed by the present invention significantly improves the real-time and accuracy of underground gas analysis through integrated design, shortened sampling distance, automatic gas path switching and other technical means, which is of great significance for ensuring safe production in coal mines; specifically, the following outstanding beneficial technical effects can be summarized:

[0040] (1) Integrated design: It integrates gas detection, automatic gas path switching, data communication and transmission, gas sampling and other functions.

[0041] (2) Shorten the sampling distance: Due to the above-mentioned integrated design, the underground mobile gas analysis device of the present invention can be installed near the coal mining face; this can shorten the sampling distance from more than 1,000 meters to less than 200 meters, thereby improving the real-time and accuracy of gas analysis.

[0042] (3) Reduce labor intensity: The gas detection device 1, communication device 2, main control device 3, power supply 4, gas circuit control device 5, and vacuum pump 6 of the present invention are integrated and installed on a flatbed mining car, and can move with the movement of the working surface support without the need for special personnel to operate.

[0043] (4) Improved accuracy: Through the structural design of the pipeline controller 501, the gas path control mechanism is optimized, the loss of gas samples during the transmission process is reduced, and the accuracy of the analysis results is ensured.

[0044] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the protection scope of the present invention.

Claims

1. A mobile underground gas analysis device, characterized in that: It includes a gas detection device, a communication device, a main control device, a power supply, a gas circuit control device, an air pump and a flatbed mining car, wherein the gas detection device, the communication device, the main control device, the power supply, the gas circuit control device and the air pump are all installed on the flatbed mining car; the power supply is respectively connected to the gas detection device, the communication device, the main control device and the gas circuit control device, and the power supply provides electrical energy for the gas detection device, the communication device, the main control device and the gas circuit control device; the gas detection device and the main control device are both connected to the communication device, the main control device is also connected to the gas circuit control device, the gas circuit control device is connected to the air pump, and the air pump is connected to the gas detection device.

2. The underground movable gas analysis device according to claim 1, characterized in that: The gas detection device comprises a signal acquisition board and a sensor group. The signal acquisition board is responsible for signal acquisition and output of the sensor group. The signal output interface of the signal acquisition board is an RS485 interface.

3. The underground movable gas analysis device according to claim 2, characterized in that: The communication device includes an RS485 interface, a network port, and a fiber optic interface. The RS485 interface of the communication device is connected to the RS485 interface of the signal acquisition board through a communication line. The communication device uses a network cable to access the communication network through the network port, or uses an optical fiber to access the network through the fiber optic interface. The communication device is connected to a ground monitoring host.

4. The underground movable gas analysis device according to claim 1, characterized in that: The gas circuit control device includes a pipeline controller, a stepper motor, and a gas circuit connector. One end of the pipeline controller is connected to the stepper motor, and the other end of the pipeline controller is connected to the gas circuit connector. The gas circuit connector is connected to the air pump, and the stepper motor is connected to the power supply and the main control device respectively.

5. The underground movable gas analysis device according to claim 4, characterized in that: The pipeline controller includes a pipeline controller body and a pipeline controller sliding rod. The pipeline controller sliding rod is arranged through the pipeline controller body. The length of the pipeline controller sliding rod is greater than the pipeline controller body. The pipeline controller sliding rod is slidably connected to the pipeline controller body. One end of the pipeline controller sliding rod is connected to the stepper motor and the other end is connected to the air circuit connector. The air inlet of the air pump is connected to the air circuit connector through a pipeline, and the air outlet of the air pump is connected to the gas detection device.

6. The underground movable gas analysis device according to claim 5, characterized in that: The pipeline controller body is a circular ring structure, and 4 gas circuit interfaces are evenly distributed along the same straight line direction on the pipeline controller body. Each gas circuit interface is connected to the inside of the pipeline controller body, and sealing rings are equidistantly provided on both sides of each gas circuit interface on the inner side of the pipeline controller body.

7. The underground movable gas analysis device according to claim 6, characterized in that: The pipeline controller sliding rod is a circular ring structure, and an air circuit interface is arranged in the middle position of the pipeline controller sliding rod. The air circuit interface is communicated with the inside of the pipeline controller sliding rod, and sealing grooves are arranged on both sides of the air circuit interface. The air circuit interface on the pipeline controller sliding rod is the same size as each air circuit interface on the pipeline controller body, and the sealing groove on the pipeline controller sliding rod is used in conjunction with the sealing ring on the pipeline controller body.

8. The underground movable gas analysis device according to claim 5, characterized in that: The pipeline controller body is connected to four gas sampling tubes, and each gas sampling tube is arranged along the lane to a monitoring point.

9. The underground movable gas analysis device according to claim 1, characterized in that: The power supply has an input voltage of AC220V / 380V / 660V / 1140V and an output voltage of DC12V; a total of 4 power supplies are output, one for the gas detection device, one for the main control device, one for the stepper motor, and one for the communication device, and the power supply current is ≤2A.

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