A multi-parameter measurement system for gas drainage pipes

Abstract

The invention discloses a multi-parameter measurement system for a gas extraction pipe, comprising: a gas extraction pipe, which comprises: a pipe body, a mounting ring, a sleeve, a diaphragm and a sampling head, one end of the pipe body and the mounting ring extend into a coal seam opening, a mounting ring is fixed to the tip of the pipe body, a sleeve is arranged outside the mounting ring, a detection hole is opened on the mounting ring, the detection hole is closed by a diaphragm, the diaphragm can move between the sleeve and the outer wall of the pipe body, the diaphragm is made of elastic material, and a sampling head is installed at the end of the pipe body away from the mounting ring and the sleeve; and a gas detector, which comprises: a detection tube, an infrared probe, a shell, a display screen and a control circuit, an infrared probe is installed on the detection tube, the infrared probe is used to detect the deformation and movement distance h of the diaphragm, and the infrared probe is connected to the control circuit. The multi-parameter measurement system for a gas extraction pipe solves the problem in the prior art that the sealing material has a high probability of leakage due to the need to open a perforation on the sealing material.

Description

Technical Field

[0001] The invention relates to equipment for detecting a gas extraction pipe, and in particular to a multi-parameter measuring system for a gas extraction pipe. Background Art

[0002] The multi-parameter measurement system for gas extraction pipes is used to test indicators such as the CH4 content, CO content, and air pressure at the air inlet in the gas extraction pipes when the gas extraction pipes are in use. It is a necessary equipment for the safe extraction of gas from the gas extraction pipes.

[0003] A Chinese patent discloses a gas extraction borehole negative pressure measuring device with an application number of CN201620709441.3, which includes: an air guide tube inserted into the gas extraction borehole, the end of the air guide tube located outside the borehole is sequentially connected to a ball valve and a vacuum negative pressure gauge, and the end located inside the borehole is connected to the air guide end; a sliding sealing system is set at the part of the borehole near the orifice, and the air guide tube 8 is sealed and connected to the borehole through the sliding sealing system, and can be translated relative to the inside and outside of the borehole through the sliding sealing system. Although the air pressure at the air inlet of the gas extraction pipe can be detected, the device still has the problem that, since the sealing material is filled in the opening opened in the coal seam, the opening opened in the coal seam needs to be sealed when extracting, and the setting of the air guide tube requires that the sealing material is perforated, resulting in a high probability of leakage of the sealing material, which cannot meet the requirement of sealing the opening opened in the coal seam. Summary of the invention

[0004] The present invention provides a multi-parameter measuring system for a gas extraction pipe, which solves the problem in the prior art that the sealing material has a high probability of leaking due to the need to open holes in the sealing material.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The invention discloses a multi-parameter measuring system for a gas extraction pipe, comprising: a gas extraction pipe, which comprises: a pipe body, a first mounting ring, a sleeve, a diaphragm and a sampling head, one end of the pipe body and the first mounting ring extend into a coal seam opening, the first mounting ring is fixed to the tip of the pipe body, the sleeve is arranged outside the first mounting ring, a detection hole is opened on the first mounting ring, the detection hole is closed by a diaphragm, the diaphragm can move between the sleeve and the outer wall of the pipe body, the diaphragm is made of elastic material, and the sampling head is installed at the end of the pipe body away from the first mounting ring and the sleeve; and a gas detector, which comprises: a detection tube, an infrared probe, a shell, a display screen and a control circuit, the detection tube is installed with an infrared probe, the infrared probe is used to detect the deformation and movement distance h of the diaphragm, the infrared probe is connected to the control circuit, the control circuit is located in the shell, the control circuit is connected to the display screen installed on the side of the shell, and the control circuit calculates the gas pressure P in the coal seam opening according to the following: P=a4h 4 +a3h3 +a2h 2 +ah+a0; In the above formula, a4, a3, a2, a and a0 are all constants. The gas extraction pipe is extended into the specified gas pressures P4, P3, P2, P1 and P0, and five different deformation movement distances h are measured. The values ​​of P4, P3, P2, P1 and P0 are different, which are calculated by fitting.

[0007] Preferably, a second mounting ring is formed between the sleeve and the tube body, a detection hole is provided on the bottom wall of the second mounting ring, a clamping ring is installed on the second mounting ring by screws, and the clamping ring presses the diaphragm onto the edge of the detection hole.

[0008] Preferably, a support rod is fixed on the side of the clamping ring facing away from the diaphragm, there are at least two support rods, and a support ring is fixed on each side of the support rod facing away from the diaphragm, and the support ring is in close contact with the detection tube.

[0009] Preferably, a mounting hole is opened at the front end of the detection tube, and a rotating arm is installed in the mounting hole. An infrared probe is installed on the rotating arm, and the infrared probe is connected to the control circuit through a wire. A spring clip is installed between the rotating arm and the inner wall of the mounting hole, and the spring clip is used to make the infrared probe on the rotating arm located in the center of the detection tube. A limit arm is installed on the inner wall of the mounting hole, and the limit arm is used to position the infrared probe in the mounting hole.

[0010] Preferably, the sampling head comprises: a connector, a one-way valve and a blocking cap; the tube body is connected to the connector, a one-way valve is installed in the connector, and a blocking cap is detachably installed at one end of the connector away from the tube body.

[0011] Preferably, an inner step is formed on the inner wall of the detection tube, and a compression tube is extended to form the inner step. The inner step is compressed on the connecting head, and the compression tube is used to push the one-way valve to open. The compression tube is connected to the methane and carbon monoxide detector located in the shell, and the methane and carbon monoxide detector is connected to the control circuit.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present application breaks with the traditional idea, realizes the opening of a detection hole at the edge of the gas extraction pipe, and closes the detection hole with a diaphragm. The diaphragm is made of elastic material. When the diaphragm forms a negative pressure in the coal seam opening, the diaphragm protrudes between the inner wall of the sleeve and the outer wall of the tube body. The protruding height of the diaphragm can reflect different air pressure values. In the process of sampling the gas extraction pipe, the gap between the outer wall of the casing and the coal seam opening can be sealed with a sealing material, which is far from the existing technology for passing through the sealing material for the pipe body, avoiding the need to open a hole in the sealing material and resulting in poor sealing of the sealing material. At the same time, the air pressure at the entrance of the pipe body is detected, avoiding the need to detect the air pressure at the detection head and failing to truly reflect the air pressure at the entrance of the pipe body, thereby ensuring both the accuracy of the detected air pressure and the sealing of the sealing material.

[0014] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the gas extraction pipe in the multi-parameter measurement system of the gas extraction pipe;

[0016] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0017] Figure 3 for Figure 1 The enlarged view of point B in the middle;

[0018] Figure 4 It is a structural schematic diagram of a gas detector;

[0019] Figure 5 This is a cross-sectional view of the detection tube in the gas detector.

[0020] Figure numerals: gas extraction tube 1, tube body 11, first mounting ring 12, sleeve 13, diaphragm 14, sampling head 15, second mounting ring 16, clamping ring 17, support rod 18, support ring 19, gas detector 2, detection tube 21, rotating arm 211, spring 212, limit arm 213, inner step 214, clamping tube 215, infrared probe 22, shell 23, display screen 24, connector 31, one-way valve 32, valve plate 321, valve stem 322, connecting column 323, return spring 324, sealing cover 33, sealing material 4. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and functions achieved by the present invention clearer and easier to understand, the present invention is further explained below in conjunction with the accompanying drawings and specific implementation methods.

[0022] like Figures 1 to 5 As shown, the present invention discloses a multi-parameter measurement system for a gas extraction pipe, comprising: a gas extraction pipe 1, which comprises: a pipe body 11, a first mounting ring 12, a sleeve 13, a diaphragm 14 and a sampling head 15, one end of the pipe body 11 and the first mounting ring 12 extend into the coal seam opening, the first mounting ring 12 is fixed to the tip of the pipe body 11, the sleeve 13 is arranged on the outer sleeve of the rotating ring, a detection hole is opened on the first mounting ring 12, the detection hole is closed by a diaphragm 14, the diaphragm 14 can move between the sleeve 13 and the outer wall of the pipe body 11, the diaphragm 14 is made of elastic material, the pipe body 11 A sampling head 15 is installed at the end away from the first mounting ring 12 and the sleeve 13; and a gas detector 2, which includes: a detection tube 21, an infrared probe 22, a shell 23, a display screen 24 and a control circuit. The detection tube 21 is equipped with an infrared probe 22, which is used to detect the deformation and movement distance h of the diaphragm 14. The infrared probe 22 is connected to the control circuit, which is located in the shell 23 and connected to the display screen 24 installed on the side of the shell 23. The control circuit calculates the gas pressure P in the coal seam opening according to the following: P=a4h 4 +a3h 3 +a2h 2 +ah+a0; In the above formula, a4, a3, a2, a and a0 are all constants. The gas extraction pipe 1 is extended into the specified gas pressures P4, P3, P2, P1 and P0, and 5 different deformation movement distances h are measured. The values ​​of P4, P3, P2, P1 and P0 are different, which are calculated by fitting.

[0023] A second mounting ring 16 is formed between the sleeve 13 and the tube body 11. The bottom wall of the second mounting ring 16 is provided with a detection hole. The second mounting ring 16 is installed with a clamping ring 17 by screws. The clamping ring 17 clamps the diaphragm 14 against the edge of the detection hole. The clamping ring 17 is connected to the inner thread of the second mounting ring 16. The clamping ring 17 clamps the edge of the diaphragm 14 against the edge of the detection hole, thereby realizing the installation of the diaphragm 14 and replacing the diaphragm 14 after using it once or twice. Since the diaphragm 14 is deformed to a certain extent after multiple uses, which will affect the detection results, the diaphragm 14 is provided to be removable, which facilitates the replacement of the diaphragm 14.

[0024] A support rod 18 is fixed on the side of the clamping ring 17 facing away from the diaphragm 14. There are at least two support rods 18. A support ring 19 is fixed on each side of the support rod 18 facing away from the diaphragm 14. The support ring 19 is in close contact with the detection tube 21. The support rod 18 and the support ring 19 support the detection tube 21 in the gas detector 2, and the support ring 19 is in close contact with the end face of the detection tube 21. The support rod 18 allows a distance between the detection tube 21 and the diaphragm 14 to prevent the detection tube 21 from affecting the elongation of the diaphragm 14. The setting of the support rod 18 ensures that there is enough gap for air to flow out after the diaphragm 14 moves after the detection tube 21 is inserted, and prevents the detection tube 21 from affecting the movement of the diaphragm 14 after the insertion.

[0025] A mounting hole is provided at the front end of the detection tube 21, and a rotating arm 211 is installed in the mounting hole. An infrared probe 22 is installed on the rotating arm 211, and the infrared probe 22 is connected to the control circuit through a wire. A spring clip 212 is installed between the rotating arm 211 and the inner wall of the mounting hole. The spring clip 212 is used to make the infrared probe 22 on the rotating arm 211 located at the center of the detection tube 21. A limiting arm 213 is installed on the inner wall of the mounting hole, and the limiting arm 213 is used to position the infrared probe 22 in the mounting hole. By installing the infrared probe 22 on the rotating arm 211, the rotating arm 211 can be rotatably installed on the detection tube 21, so that when detecting the position of the diaphragm 14, the infrared probe 22 on the rotating arm 211 can be kept facing the diaphragm 14 under the elastic force of the spring 212, ensuring that the position of the diaphragm 14 can be detected; when detecting the concentration of methane and carbon monoxide, the infrared probe 22 can be rotated to a position away from the center of the detection tube 21, avoiding subsequent influence on the connection between the detection tube 21 and the sampling head 15.

[0026] The sampling head 15 includes: a connector 31, a one-way valve 32 and a blocking cap 33. The tube body 11 is connected to the connector 31, the one-way valve 32 is installed in the connector 31, and the blocking cap 33 is detachably installed at one end of the connector 31 away from the tube body 11.

[0027] An inner step 214 is formed on the inner wall of the detection tube 21, and a compression tube 215 is extended from the inner step 214. The inner step 214 is compressed on the connecting head 31. The compression tube 215 is used to push the one-way valve 32 to open. The compression tube 215 is connected to the methane and carbon monoxide detector located in the shell 23, and the methane and carbon monoxide detector is connected to the control circuit.

[0028] The one-way valve 32 includes: a valve plate 321, a valve stem 322, a connecting column 323 and a reset spring 324. A first close-fitting step is provided at the connection between the connector 31 and the tube body 11. The close-fitting step is used to close to the valve plate 321. The valve plate 321 is fixed to one end of the valve stem 322. The other end of the valve stem 322 extends into the connector 31. A second close-fitting step is formed in the connector 31. The second close-fitting step is used to close to the inner step 214 or the blocking cover 33 in the detection tube 21. The connecting column 323 is fixed on the valve stem 322. The connecting column 323 is used to be in close contact with the clamping tube 215. A return spring 324 is installed between the second close contact step and the connecting column 323. The return spring 324 is used to press the valve plate 321 against the first close contact step. There are at least two connecting columns 323. The connecting columns 323 are distributed in the radial direction of the valve stem 322. There is a gap between two adjacent connecting columns 323. The gap between two adjacent connecting columns 323 is aligned with the inner hole of the clamping tube 215, so that the gas can smoothly enter the clamping tube 215 from the valve stem 322.

[0029] In the present application, firstly, in order to realize the air pressure at the front end of the detection tube 21 body 11, avoid the inconsistency between the air pressure in the middle part of the detection tube 21 body 11 and the air pressure at the front end, and avoid the need to open holes other than the supply tube body 11 on the sealing material 4 to cause poor sealing, a sleeve 13, a first mounting ring 12 and a diaphragm 14 are provided in the gas extraction tube 1, and the sampling head 15 can still provide sample gas for detecting gas components, so that the gas detector 2 can obtain the front end air pressure value through calculation after the detection diaphragm 14 moves a distance h; then, in order to avoid deformation of the diaphragm 14 and affect the detection result, the diaphragm 14 is provided to be replaceable; and then, in order to locate the position of the detection tube 21 in the gas detector 2, a support rod 18 and The support ring 19 also prevents the detection tube 21 from blocking the deformation of the diaphragm 14 and prevents the position of the detection tube 21 from affecting the detection result; then, in order to obtain the gas sample through the sampling head 15 without blocking the infrared probe 22, the infrared probe 22 is positioned by the rotating arm 211, the spring 212 and the limit arm 213, so that the sampling head 15 can be pressed and aligned with the subsequent pressing tube 215 to achieve leakage-free sampling; then, to ensure the sealing during sampling, the inner step 214 of the detection tube 21 and the pressing tube 215 are provided, the inner step 214 cooperates with the first close-fitting step to achieve sealed sampling, and the pressing tube 215 acts on the one-way valve 32 to push the one-way valve 32 to open the sampling head 15.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A multi-parameter measurement system for a gas drainage pipe, characterized in that: include: A gas extraction pipe (1) comprises: a pipe body (11), a mounting ring (16) (12), a sleeve (13), a diaphragm (14) and a sampling head (15); one end of the pipe body (11) and the first mounting ring (12) extend into a coal seam opening; the first mounting ring (12) is fixed to the tip of the pipe body (11); the sleeve (13) is disposed on the outer sleeve of the mounting ring; a detection hole is provided on the first mounting ring (12); the detection hole is closed by a diaphragm (14); the diaphragm (14) can move between the sleeve (13) and the outer wall of the pipe body (11); the diaphragm (14) is made of elastic material; the sampling head (15) is installed at the end of the pipe body (11) away from the first mounting ring (12) and the sleeve (13); and A gas detector (2) comprises: a detection tube (21), an infrared probe (22), a housing (23), a display screen (24) and a control circuit. The detection tube (21) is provided with an infrared probe (22). The infrared probe (22) is used to detect the deformation and movement distance h of a diaphragm (14). The infrared probe (22) is connected to a control circuit. The control circuit is located in the housing (23). The control circuit is connected to a display screen (24) installed on the side of the housing (23). The control circuit calculates the gas pressure P in a coal seam opening according to the following formula: P=a4h 4 +a3h 3 +a2h 2 +ah+a0; In the above formula, a4, a3, a2, a and a0 are all constants. The gas extraction pipe (1) is inserted into the specified gas pressure P4, P3, P2, P1, P0 to measure 5 different deformation movement distances h. The values ​​of P4, P3, P2, P1, P0 are different and are calculated by fitting method; A second mounting ring (16) is formed between the sleeve (13) and the tube body (11), a detection hole is provided on the bottom wall of the second mounting ring (16), a clamping ring (17) is mounted on the second mounting ring (16) by means of screws, and the clamping ring (17) presses the diaphragm (14) against the edge of the detection hole; A support rod (18) is fixed on the side of the clamping ring (17) facing away from the diaphragm (14), and there are at least two support rods (18). A support ring (19) is fixed on the side of the support rods (18) facing away from the diaphragm (14), and the support ring (19) is in close contact with the detection tube (21); A mounting hole is provided at the front end of the detection tube (21), a rotating arm (211) is mounted on the mounting hole, an infrared probe (22) is mounted on the rotating arm (211), the infrared probe (22) is connected to a control circuit via a wire, a spring sheet (212) is mounted between the rotating arm (211) and the inner wall of the mounting hole, the spring sheet (212) is used to make the infrared probe (22) on the rotating arm (211) be located at the center of the detection tube (21), a limiting arm (213) is mounted on the inner wall of the mounting hole, the limiting arm (213) is used to position the infrared probe (22) in the mounting hole.

2. A gas drainage pipe multi-parameter measurement system according to claim 1, characterized in that: The sampling head (15) comprises: a connector (31), a one-way valve (32) and a blocking cover (33); the tube body (11) is connected to the connector (31), the one-way valve (32) is installed in the connector (31), and the blocking cover (33) is detachably installed at one end of the connector (31) away from the tube body (11).

3. A gas drainage pipe multi-parameter measurement system according to claim 2, characterized in that: An inner step (214) is formed on the inner wall of the detection tube (21), and a compression tube (215) is extended from the inner step (214). The inner step (214) is compressed on the connector (31), and the compression tube (215) is used to push the one-way valve (32) to open. The compression tube (215) is connected to a methane and carbon monoxide detector located in the housing (23), and the methane and carbon monoxide detector is connected to a control circuit.

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