Self-adjusting type gas extraction negative pressure stabilizing device

Abstract

The utility model discloses a self-adjusting type gas extraction negative pressure stabilizing device which comprises an extraction main pipe and is characterized in that the extraction main pipe is arranged in the middle of a coal seam, the peripheral face of the extraction main pipe is connected with branch extraction pipes, and the branch extraction pipes extend to the position above the ground; pressure sensors used for detecting the internal extraction pressure of the branch extraction pipes are fixedly installed on the peripheral faces of the branch extraction pipes, the ends, away from the extraction main pipe, of the branch extraction pipes communicate with the input end of a pump body, the output end of the pump body communicates with an output pipe, and a fixing frame is fixedly connected to the peripheral faces of the branch extraction pipes. An electric control adjusting mechanism is arranged in the fixing frame, the pressure sensor is electrically connected with the first PLC, and the first PLC is electrically connected with the pump body and the electric control adjusting mechanism. According to the device, the safety and the high efficiency of the gas extraction process are ensured by monitoring the pressure and controlling the dynamic adjustment of the extraction power of the pump body, the electric control adjusting mechanism is controlled to automatically adjust the extraction area in the branch extraction pipe, and the overall extraction effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal mine gas extraction technical field, concretely relates to a self -adjusting type gas extraction negative pressure stabilizing device. BACKGROUND

[0002] In the coal mining process, gas extraction is one of the key measures to ensure the safety production of mine, however, the traditional gas extraction system generally exists the problem that the negative pressure value fluctuation is big, the fluctuation of negative pressure value not only will influence extraction efficiency, leads to gas extraction to be insufficient, still can cause safety hidden danger, such as gas accumulation, leakage etc., in order to solve this problem, the coal mining enterprises usually adopt manual regulation mode, passes through the power of extraction pump or valve opening degree manual adjustment to stabilize the negative pressure value.

[0003] However, this mode not only is inefficient, and is difficult to guarantee the stability and accuracy of negative pressure value, in addition, along with the increase of coal mining depth and the increase of mining difficulty, the problem faced in the gas extraction process is increasingly complex. UTILITY MODEL CONTENTS

[0004] The utility model discloses in order to solve above-mentioned problem, the purpose is to provide a self -adjusting type gas extraction negative pressure stabilizing device.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a self -adjusting type gas extraction negative pressure stabilizing device, including extraction main pipe, its characterized in that: extraction main pipe sets up in the middle of coal seam, and the outer peripheral surface of extraction main pipe is connected with branch extraction pipe, and branch extraction pipe extends to above ground, and the outer peripheral surface of branch extraction pipe is installed fixed with the pressure sensor for detecting the internal extraction pressure of branch extraction pipe, and the end, away from extraction main pipe of branch extraction pipe, communicates with the input end of pump body, and the output end of pump body communicates with the output pipe, and the outer peripheral surface of branch extraction pipe is fixedly connected with fixed frame, and the inside of fixed frame is provided with electric control adjusting mechanism, and pressure sensor is electrically connected with first PLC controller, and first PLC controller is electrically connected with pump body and electric control adjusting mechanism.

[0007] Further, in the self-adjusting gas extraction negative pressure stabilizing device provided by the utility model, the electric control adjusting mechanism comprises a push rod device, a movable frame, a first arc plate assembly and a second arc plate assembly, the push rod device is fixedly installed in the interior of the fixed frame, the tail end of the push rod of the push rod device is fixedly connected with the movable frame, the movable frame is slidably connected with the fixed frame, the movable frame is provided with a first clamping groove and a second clamping groove in opposite positions, the first arc plate assembly comprises a first clamping rod and a first arc plate, the first clamping rod is movably connected in the first clamping groove, the second arc plate assembly comprises a second clamping rod and a second arc plate, the second clamping rod is movably connected in the second clamping groove, and the push rod device drives the movable frame to slide in the interior of the fixed frame, so that the first arc plate and the second arc plate are opened or overlapped in the branch extraction pipe.

[0008] Further, in the self-adjusting gas extraction negative pressure stabilizing device provided by the utility model, the electric control adjusting mechanism comprises a push rod device, a movable frame, a first arc plate assembly and a second arc plate assembly, the push rod device is fixedly installed in the interior of the fixed frame, the tail end of the push rod of the push rod device is fixedly connected with the movable frame, the movable frame is slidably connected with the fixed frame, the movable frame is provided with a first clamping groove and a second clamping groove in opposite positions, the first arc plate assembly comprises a first clamping rod and a first arc plate, the first clamping rod is movably connected in the first clamping groove, the second arc plate assembly comprises a second clamping rod and a second arc plate, the second clamping rod is movably connected in the second clamping groove, and the push rod device drives the movable frame to slide in the interior of the fixed frame, so that the first arc plate and the second arc plate are opened or overlapped in the branch extraction pipe.

[0009] Further, in the self-adjusting gas extraction negative pressure stabilizing device provided by the utility model, the electric control adjusting mechanism comprises a push rod device, a movable frame, a first arc plate assembly and a second arc plate assembly, the push rod device is fixedly installed in the interior of the fixed frame, the tail end of the push rod of the push rod device is fixedly connected with the movable frame, the movable frame is slidably connected with the fixed frame, the movable frame is provided with a first clamping groove and a second clamping groove in opposite positions, the first arc plate assembly comprises a first clamping rod and a first arc plate, the first clamping rod is movably connected in the first clamping groove, the second arc plate assembly comprises a second clamping rod and a second arc plate, the second clamping rod is movably connected in the second clamping groove, and the push rod device drives the movable frame to slide in the interior of the fixed frame, so that the first arc plate and the second arc plate are opened or overlapped in the branch extraction pipe.

[0010] Further, in the self-adjusting gas extraction negative pressure stabilizing device provided by the utility model, the electric control adjusting mechanism comprises a push rod device, a movable frame, a first arc plate assembly and a second arc plate assembly, the push rod device is fixedly installed in the interior of the fixed frame, the tail end of the push rod of the push rod device is fixedly connected with the movable frame, the movable frame is slidably connected with the fixed frame, the movable frame is provided with a first clamping groove and a second clamping groove in opposite positions, the first arc plate assembly comprises a first clamping rod and a first arc plate, the first clamping rod is movably connected in the first clamping groove, the second arc plate assembly comprises a second clamping rod and a second arc plate, the second clamping rod is movably connected in the second clamping groove, and the push rod device drives the movable frame to slide in the interior of the fixed frame, so that the first arc plate and the second arc plate are opened or overlapped in the branch extraction pipe.

[0011] Further, in the self-adjusting gas extraction negative pressure stabilizing device provided by the utility model, the electric control adjusting mechanism comprises a push rod device, a movable frame, a first arc plate assembly and a second arc plate assembly, the push rod device is fixedly installed in the interior of the fixed frame, the tail end of the push rod of the push rod device is fixedly connected with the movable frame, the movable frame is slidably connected with the fixed frame, the movable frame is provided with a first clamping groove and a second clamping groove in opposite positions, the first arc plate assembly comprises a first clamping rod and a first arc plate, the first clamping rod is movably connected in the first clamping groove, the second arc plate assembly comprises a second clamping rod and a second arc plate, the second clamping rod is movably connected in the second clamping groove, and the push rod device drives the movable frame to slide in the interior of the fixed frame, so that the first arc plate and the second arc plate are opened or overlapped in the branch extraction pipe.

[0012] Further, in the self-adjusting gas extraction negative pressure stabilizing device provided by the utility model, the electric control adjusting mechanism comprises a push rod device, a movable frame, a first arc plate assembly and a second arc plate assembly, the push rod device is fixedly installed in the interior of the fixed frame, the tail end of the push rod of the push rod device is fixedly connected with the movable frame, the movable frame is slidably connected with the fixed frame, the movable frame is provided with a first clamping groove and a second clamping groove in opposite positions, the first arc plate assembly comprises a first clamping rod and a first arc plate, the first clamping rod is movably connected in the first clamping groove, the second arc plate assembly comprises a second clamping rod and a second arc plate, the second clamping rod is movably connected in the second clamping groove, and the push rod device drives the movable frame to slide in the interior of the fixed frame, so that the first arc plate and the second arc plate are opened or overlapped in the branch extraction pipe.

[0013] Further, in the self-adjusting gas extraction negative pressure stabilizing device provided by the utility model, the electric control adjusting mechanism comprises a push rod device, a movable frame, a first arc plate assembly and a second arc plate assembly, the push rod device is fixedly installed in the interior of the fixed frame, the tail end of the push rod of the push rod device is fixedly connected with the movable frame, the movable frame is slidably connected with the fixed frame, the movable frame is provided with a first clamping groove and a second clamping groove in opposite positions, the first arc plate assembly comprises a first clamping rod and a first arc plate, the first clamping rod is movably connected in the first clamping groove, the second arc plate assembly comprises a second clamping rod and a second arc plate, the second clamping rod is movably connected in the second clamping groove, and the push rod device drives the movable frame to slide in the interior of the fixed frame, so that the first arc plate and the second arc plate are opened or overlapped in the branch extraction pipe.

[0014] Further, in the self-adjusting gas extraction negative pressure stabilizing device provided by the utility model, the first clamping rod and the second clamping rod are vertically arranged, the first clamping rod is connected and fixed at the top horizontal extension protrusion of the first sleeve, the second clamping rod is connected and fixed at the top horizontal extension protrusion of the sleeve rod, and the length of the second clamping rod is greater than that of the first clamping rod.

[0015] Further, in the self-adjusting gas extraction negative pressure stabilizing device provided by the utility model, the first clamping rod and the second clamping rod are vertically arranged, the first clamping rod is connected and fixed at the top horizontal extension protrusion of the first sleeve, the second clamping rod is connected and fixed at the top horizontal extension protrusion of the sleeve rod, and the length of the second clamping rod is greater than that of the first clamping rod.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The self-adjusting gas extraction negative pressure stabilizing device monitors pressure through a pressure sensor, transmits the pressure signal to a first PLC controller, controls the pumping power of the pump body to dynamically adjust, ensures the safety and efficiency of the gas extraction process, automatically adjusts the extraction area inside the branch extraction pipe through the first PLC controller, can real-time adjust the unevenness of the gas distribution in the coal seam, maintains the negative pressure stability, thereby speeds up the extraction speed and improves the overall extraction effect. In addition, the temperature sensor arranged on the ventilation pipe detects the internal temperature of the pipe in real time, transmits the temperature signal to a second PLC controller, and the second PLC controller controls the working state of the cooling device, realizes effective regulation and control of the temperature inside the extraction main pipe, avoids the explosion risk caused by the friction between the gas and the inner wall of the extraction main pipe, and further enhances the practicability and applicability of the device. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole three-dimensional structure schematic view of the self-adjusting gas extraction negative pressure stabilizing device in the utility model embodiment;

[0019] Figure 2 It is a three-dimensional structure schematic view of the electric control adjusting mechanism in the utility model embodiment;

[0020] Figure 3 It is Figure 2 It is a local enlarged schematic view of A in the utility model embodiment;

[0021] Figure 4 It is an explosion decomposition three-dimensional structure schematic view of the electric control adjusting mechanism in the utility model embodiment;

[0022] Figure 5 For Figure 4 Local enlarged view at B.

[0023] Figure label: 1, the main extraction pipe; 2, branch extraction pipe; 3, pressure sensor; 4, pump body; 5, output pipe; 6, fixed frame; 601, chute; 602, through slot; 7, adjusting mechanism; 701, push rod device; 702, movable frame; 703, slider; 704, first clamping groove; 705, second clamping groove; 706, first sleeve; 707, first arc plate; 708, second sleeve; 709, first clamping rod; 710, sleeve rod; 711, second arc plate; 712, second clamping rod; 8, ventilation pipe; 9, cooling device; 10, temperature sensor. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the following embodiments are combined with the drawings to specifically describe the technical scheme of the utility model.

[0025] Referring to Figure 1 , the embodiment provides a self-adjusting gas extraction negative pressure stabilizing device, which comprises an extraction main pipe 1, the extraction main pipe 1 is arranged in the middle of a coal seam, and the outer periphery of the extraction main pipe 1 is connected with a branch extraction pipe 2, and the branch extraction pipe 2 extends to above the ground. The outer periphery of the extraction main pipe 1 is also connected with a ventilation pipe 8, and the ventilation pipe 8 extends to above the ground.

[0026] A pressure sensor 3 is fixedly installed on the outer periphery of the branch extraction pipe 2, and the pressure sensor 3 is used for detecting the internal extraction pressure of the branch extraction pipe 2. In the embodiment, the pressure sensor 3 adopts a pipeline pressure recorder, which is a product integrating a sensor, an electronic data display recorder and a meter. One end of the branch extraction pipe 2 away from the extraction main pipe 1 is in communication with the input end of a pump body 4, and the output end of the pump body 4 is in communication with an output pipe 5. The outer periphery of the branch extraction pipe 2 is fixedly connected with a fixed frame 6, and the fixed frame 6 is internally provided with an electric control adjusting mechanism 7. The pressure sensor 3 is electrically connected with a first PLC controller (not shown in the figure), and the first PLC controller is electrically connected with the pump body 4 and the electric control adjusting mechanism 7.

[0027] The ventilation pipe 8 is in communication with the output end of a cooling device 9 at an end away from the extraction main pipe 1. A temperature sensor 10 is fixedly installed on the outer periphery of the ventilation pipe 8, and the temperature sensor 10 is used for detecting the internal temperature of the ventilation pipe 8. In the embodiment, the temperature sensor 10 adopts a temperature detector with a sensor function, which is a product integrating a sensor, an electronic data display meter and a meter. The temperature sensor 10 is electrically connected with a second PLC controller (not shown in the figure), and the second PLC controller is electrically connected with the cooling device 9, and the second PLC controller controls the opening and closing of the cooling device 9.

[0028] Referring to Figures 2 to 5 , the electric control adjusting mechanism 7 comprises a push rod device 701, a movable frame 702, a first arc plate assembly, and a second arc plate assembly.

[0029] The push rod device 701 is a power driven component. The push rod device 701 can adopt an electric push rod or an air cylinder. When the push rod device 701 adopts an electric push rod, the electric push rod is electrically connected with the first PLC controller, and the working state of the electric push rod is controlled by the first PLC controller. When the push rod device 701 adopts an air cylinder, the air cylinder is connected with an electromagnetic valve, and the electromagnetic valve is electrically connected with the first PLC controller. The first PLC controller controls the opening and closing state of the electromagnetic valve, thereby controlling the working state of the air cylinder. As shown in Figure 2 , in the embodiment, the push rod device 701 adopts an air cylinder.

[0030] The push rod device 701 is installed and fixed inside the fixed frame 6. The push rod device 701 is fixedly connected with the movable frame 702 at the end of the push rod. The movable frame 702 is slidingly connected with the fixed frame 6. The sliding connection mode is as follows: Figure 2 and Figure 3 The inner walls of the opposite sides of the fixed frame 6 are both provided with sliding grooves 601. The outer walls of the opposite sides of the movable frame 702 are both fixedly provided with sliding blocks 703. The sliding blocks 703 on the opposite sides are slidingly connected and installed in the sliding grooves 601 on the opposite sides in cooperation.

[0031] Referring to Figure 4 and Figure 5 , the first arc plate assembly comprises a first sleeve 706, a first arc plate 707, a second sleeve 708, and a first clamping rod 709 arranged from top to bottom. The first sleeve 706 and the second sleeve 708 are coaxially arranged. The first sleeve 706 and the second sleeve 708 are respectively connected and fixed at the upper end and the lower end of the straight line side of the first arc plate 707. The first clamping rod 709 is vertically arranged and connected and fixed at the top horizontal extension protrusion of the first sleeve 706. The second arc plate assembly comprises a sleeve rod 710, and the outer circumferential surface of the sleeve rod 710 is fixedly connected with a second arc plate 711. A second clamping rod 712 is connected and fixed at the top horizontal extension protrusion of the sleeve rod 710. The length of the second clamping rod 712 is greater than the length of the first clamping rod 709. The first arc plate 707 and the second arc plate 711 are matched with the internal shape of the branch extraction pipe 2.

[0032] Referring to Figure 4 and Figure 2 , the movable frame 702 is provided with a first clamping groove 704 and a second clamping groove 705 in opposite positions. The first clamping rod 709 of the first arc plate assembly is movably connected in the first clamping groove 704. The second clamping rod 712 of the second arc plate assembly is movably connected in the second clamping groove 705.

[0033] Referring to Figure 4 and Figure 2The bottom of the fixed frame 6 is provided with a circular through slot 602, and the first sleeve 706 is rotationally connected in the through slot 602. The first sleeve 706 and the second sleeve 708 of the first arc plate assembly are rotationally connected to the upper end and the lower end of the sleeve rod 710, and the sleeve rod 710 is located in the first sleeve 706 and the second sleeve 708.

[0034] When the push rod of the push rod device is retracted, the movable frame 702 is driven to slide in the fixed frame 6, and then the first clamping rod 709 and the second clamping rod 712 are driven to rotate in opposite directions through the first clamping slot 704 and the second clamping slot 705, the first clamping rod 709 drives the first sleeve 706 and the second sleeve 708 to rotate the first arc plate 707, and the second clamping rod 712 drives the second arc plate 711 to rotate, and finally the first arc plate 707 and the second arc plate 711 are opened or overlapped in the branch gas extraction pipe 2 to adjust the extraction area in the branch gas extraction pipe 2, thereby improving the adjustment efficiency of the internal extraction pressure of the branch gas extraction pipe 2.

[0035] The working principle of the self-adjusting gas extraction negative pressure stabilizing device is as follows: the pressure sensor 3 monitors the extraction pressure in the branch gas extraction pipe 2 in real time, the pressure signal collected by the pressure sensor 3 is transmitted to the first PLC controller, the first PLC controller controls the extraction power of the pump body 4, and the first PLC controller controls the electric control adjusting mechanism 7 to adjust the extraction area in the branch gas extraction pipe 2. Real-time adjustment is made according to the unevenness of the gas distribution in the coal seam, the negative pressure is stabilized, and the safety and efficiency of the entire extraction process are ensured. In addition, when the gas and the inner wall of the extraction main pipe 1 continuously rub to cause the temperature of the inner wall of the extraction main pipe 1 to rise to a certain degree, the temperature sensor 10 will detect the temperature anomaly in the ventilation pipe 8, the temperature signal collected by the temperature sensor 10 is transmitted to the second PLC controller, and the second PLC controller controls the cooling device 9 to be turned on, and the cooling air is sent into the extraction main pipe 1 to avoid the explosion caused by the overheating of the extraction main pipe 1.

[0036] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only the principles of the utility model. Without departing from the spirit and scope of the utility model, various changes and improvements can be made to the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope required by the utility model is defined by the appended claims and their equivalents.

Claims

1. A self-regulating gas extraction negative pressure stabilizing device, comprising an extraction main pipe, characterized in that: The main extraction pipe is located in the middle of the coal seam, and a branch extraction pipe is connected to the outer circumference of the main extraction pipe. The branch extraction pipe extends above the ground, and a pressure sensor for detecting the internal extraction pressure of the branch extraction pipe is installed and fixed on the outer circumference of the branch extraction pipe. The end of the branch extraction pipe furthest from the main extraction pipe is connected to the input end of the pump body, and the output end of the pump body is connected to an output pipe. A fixing frame is fixedly connected to the outer circumference of the branch extraction pipe, and an electrically controlled adjustment mechanism is installed inside the fixing frame. The pressure sensor is electrically connected to the first PLC controller, and the first PLC controller is electrically connected to the pump body and the electronic control adjustment mechanism.

2. The self-regulating gas extraction negative pressure stabilizing device as described in claim 1, characterized in that: in, The electronically controlled adjustment mechanism includes a push rod device, a movable frame, a first arc plate assembly, and a second arc plate assembly. The push rod device is installed and fixed inside the fixed frame. The push rod end of the push rod device is fixedly connected to a movable frame, and the movable frame is slidably connected to the fixed frame. The movable frame has a first slot and a second slot that are positioned opposite each other. The first arc plate assembly has a first locking rod and a first arc plate, wherein the first locking rod is movably connected within the first locking slot. The second arc plate assembly has a second locking rod and a second arc plate, the second locking rod being movably connected within the second locking slot. The push rod device drives the movable frame to slide inside the fixed frame, so that the first arc plate and the second arc plate open or overlap in the branch extraction tube.

3. The self-regulating gas extraction negative pressure stabilizing device as described in claim 2, characterized in that: in, The push rod device is an electric push rod, and the electric push rod is electrically connected to the first PLC controller.

4. The self-regulating gas extraction negative pressure stabilizing device as described in claim 2, characterized in that: in, The push rod device is a cylinder, which is connected to a solenoid valve, and the solenoid valve is electrically connected to the first PLC controller.

5. The self-regulating gas extraction negative pressure stabilizing device as described in claim 2, characterized in that: in, The inner walls of the opposite sides of the fixing frame are provided with sliding grooves. The two outer walls of the movable frame are fixed with sliders, and the sliders on both sides are slidably connected and installed in the sliding grooves on both sides.

6. The self-regulating gas extraction negative pressure stabilizing device as described in claim 2, characterized in that: in, The first and second arc plates are adapted to the internal shape of the branch extraction tube.

7. The self-regulating gas extraction negative pressure stabilizing device as described in claim 2, characterized in that: in, The first arc plate assembly includes a first sleeve, a first arc plate, and a second sleeve arranged from top to bottom. The first sleeve and the second sleeve are coaxially arranged and are respectively connected and fixed to the upper end and lower end of the straight edge of the first arc plate. The second arc plate assembly includes a sleeve rod, and the outer circumferential surface of the sleeve rod is fixedly connected to the second arc plate.

8. The self-regulating gas extraction negative pressure stabilizing device as described in claim 7, characterized in that: in, The first sleeve and the second sleeve of the first arc plate assembly are rotatably connected to the upper end and the lower end of the sleeve rod, respectively, and the sleeve rod is located inside the first sleeve and the second sleeve. The bottom of the fixing frame is provided with a circular through groove, and the first sleeve is rotatably connected inside the through groove.

9. The self-regulating gas extraction negative pressure stabilizing device as described in claim 7, characterized in that: in, Both the first and second locking levers are vertically positioned. The first locking rod is connected and fixed to the horizontally extending protrusion at the top of the first sleeve. The second locking rod is connected and fixed to the horizontally extending protrusion at the top of the sleeve rod. The length of the second lever is greater than the length of the first lever.

10. The self-regulating gas extraction negative pressure stabilizing device as described in claim 1, characterized in that: in, The outer periphery of the extraction main pipe is connected to a ventilation pipe. The end of the ventilation pipe away from the extraction main pipe is connected to the output end of the cooling device. A temperature sensor for detecting the internal temperature of the ventilation pipe is installed and fixed on the outer periphery of the ventilation pipe. The temperature sensor is electrically connected to a second PLC controller, and the second PLC controller is electrically connected to the cooling device.

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