A kind of anti-pressure break bundle pipe for three-zone testing in coal mine goaf and its laying method

Abstract

The present invention discloses a pressure-breaking anti-bundle pipe for three-zone testing in coal mine goaf and a laying method thereof, comprising: a single-core bundle pipe; a pressure-resistant structure, the pressure-resistant structure is arranged in the single-core bundle pipe, and an airflow channel is formed between the pressure-resistant structure and the inner wall of the single-core bundle pipe; a sleeve, the cross-sectional shape of the sleeve is rectangular, the single-core bundle pipe is inserted into the sleeve, a through groove is provided in the middle position of one side of the sleeve, and a sealing plate is rotatably connected to the through groove; a reset component, the reset component is arranged between the sealing plate and the inner top wall of the sleeve, and the reset component is used to generate thrust for the sealing plate; a connecting component, the connecting component is arranged at both ends of the sleeve, and adjacent sleeves are detachably connected through the connecting components. The present invention adopts a self-locking sleeve structure, realizes the independent installation between the sleeve and the bundle pipe, improves the traditional bundle pipe threading method, simplifies the cumbersome process of traditional bundle pipe threading, and greatly improves the laying efficiency of the bundle pipe.

Description

Technical Field

[0001] The invention relates to the technical field of goaf area bundle pipe protection, in particular to a compression-break-proof bundle pipe for three-zone testing in a coal mine goaf and a laying method thereof. Background Art

[0002] Spontaneous combustion of coal residue in goaf is one of the main disasters threatening coal mine safety production. Due to the specific collapse space in goaf, workers cannot enter the goaf, and existing detection technology cannot accurately measure the location of the fire source. With the advancement of the coal mining face, the coal residue in the goaf will generally experience the heat dissipation zone, oxidation zone and asphyxiation zone, and spontaneous combustion of coal residue mostly occurs in the oxidation zone. Therefore, accurately dividing the range of the three zones of spontaneous combustion in goaf is the key to controlling the spontaneous combustion of coal residue, which is of great significance for preventing mine fires. Article 14 of the "Detailed Rules for Coal Mine Fire Prevention and Extinguishing" (Mine Safety

[2021] No. 156) of the State Administration of Mine Safety stipulates that when mining coal seams that are prone to spontaneous combustion and spontaneous combustion, the same coal seam should be measured at least once for the distribution range of the "three zones" of natural combustion in the goaf of the coal mining face. The existing three-zone test method for coal mine goafs is to pre-embed bundle pipes in the air inlet and return lanes of the working face or behind the working face frame. As the working face advances, the hydraulic support moves forward, the roof behind the frame collapses, and the bundle pipes and casings are covered by the collapsed rock in the goaf. The three zones of the goaf are determined by extracting the gas in the bundle pipes and analyzing the gas composition. However, in the actual "three-zone" test process, the casing is often bent by the impact of coal gangue that collapses from the roof of the goaf, or is squeezed by operations such as moving the working face frame, causing the internal bundle pipes to be damaged and fail. The failure of the bundle pipe requires the re-arrangement of the test, which not only causes a lot of waste of manpower and material resources, but also prolongs the test cycle. At the same time, the traditional casing is a seamless steel pipe, and the pipe threading operation during the laying of the bundle pipe is quite cumbersome and time-consuming. A Chinese patent with authorization announcement number CN107091114A discloses a bundle pipe protection device for coal mine goafs and a method of using the device. The bundle pipes are protected by connecting flexible metal pipes and steel pipes with metal clips, thus avoiding bending of the bundle pipes at the corners of the tunnel. However, it does not substantially solve the problem of the casing being bent by the impact of coal gangue from the roof collapse. The laying method is to pass the bundle pipe through the steel pipe, the flexible metal pipe, and the next steel pipe in sequence, and repeat the operation to the measuring point. Compared with the conventional laying method, the laying efficiency of the bundle pipe is limited, and the tedious step of bundle pipe threading in the laying of the bundle pipe is not effectively solved. Therefore, it is necessary to design a compression-proof bundle pipe for three-zone testing in coal mine goafs and a laying method thereof. Summary of the invention

[0003] The purpose of the present invention is to provide a compression-breakage-proof bundle pipe for three-zone testing in coal mine goaf and a laying method thereof, so as to solve the problems existing in the prior art.

[0004] To achieve the above object, the present invention provides the following solution: The present invention provides a pressure-breakage-proof bundle pipe for three-zone testing in coal mine goaf, comprising:

[0005] Single core bundle tube;

[0006] A pressure-resistant structure, wherein the pressure-resistant structure is arranged in the single-core bundle tube, and an air flow channel is formed between the pressure-resistant structure and the inner wall of the single-core bundle tube;

[0007] A sleeve, wherein the cross-sectional shape of the sleeve is rectangular, the single-core bundle tube is inserted into the sleeve, a through slot is provided in the middle of one side of the sleeve, and a sealing plate is rotatably connected to the through slot;

[0008] A reset component, the reset component is arranged between the sealing plate and the inner top wall of the sleeve, and the reset component is used to generate a thrust on the sealing plate;

[0009] A connecting assembly is provided at both ends of the sleeve, and adjacent sleeves are detachably connected via the connecting assembly.

[0010] According to the anti-compression break bundle pipe for three-zone testing in coal mine goaf areas provided by the present invention, the compression-resistant structure includes a solid steel bar coaxially arranged in the single-core bundle pipe, the diameter of the solid steel bar is smaller than the inner diameter of the single-core bundle pipe, and a plurality of flexible compression-resistant grilles are circumferentially equidistantly arranged between the solid steel bar and the inner wall of the single-core bundle pipe, and airflow channels are formed between adjacent flexible compression-resistant grilles.

[0011] According to the anti-compression-break bundle tube for three-zone testing in coal mine goaf areas provided by the present invention, the reset assembly includes a compression spring, both ends of the compression spring are fixedly connected to the inner wall of the sealing plate and the inner wall of the top of the casing respectively, and the compression spring and the top wall of the casing and the sealing plate are arranged in a triangular structure.

[0012] According to the anti-compression-break bundle tube for three-zone testing in coal mine goaf areas provided by the present invention, the connecting assembly includes connecting plates, and four groups of connecting plates are respectively fixed at both ends of the casing, and the four groups of connecting plates located at the same end are arranged symmetrically in pairs, through holes are opened on the connecting plates, and the connecting plates at both ends of adjacent casings are fixedly connected by bolts.

[0013] According to the anti-compression-break bundle pipe for three-zone testing in coal mine goaf provided by the present invention, a hinge is installed on the top wall of the through slot, and the sealing plate is rotatably connected to the through slot through the hinge.

[0014] According to the anti-compression-break bundle pipe for three-zone testing in coal mine goaf provided by the present invention, the width of the through groove is smaller than the width of the casing, and the bottom of the sealing plate abuts against the inner wall of the casing.

[0015] According to the anti-compression-break bundle tube for three-zone testing in coal mine goaf provided by the present invention, the diameter of the single-core bundle tube is 10mm-14mm.

[0016] A method for laying a pressure-break-proof bundle pipe for three-zone testing in a coal mine goaf comprises the following steps:

[0017] Step 1: determine the tunnel length and select a single-core bundle tube of corresponding length;

[0018] Step 2: fix the end of the single-core bundle pipe at a predetermined position at the corner of the coal mining working face, and arrange the single-core bundle pipe along the slot in a direction away from the working face;

[0019] Step 3, determining the length of the sleeve and the required number according to the length of the single-core bundle tube;

[0020] Step 4: Install the sleeve from the end of the single-core bundle tube. During installation, first push the sealing plate, open the sleeve, insert the single-core bundle tube into the sleeve, loosen the sealing plate, and the sealing plate will be reset under the action of the reset component. Install the sleeves on the single-core bundle tube in turn, connect the adjacent sleeves through the connecting component, and complete the installation of the sleeve.

[0021] The present invention discloses the following technical effects:

[0022] The present invention effectively solves the problem of tube bundle failure after the sleeve is impacted or squeezed by setting a compression-resistant structure, thereby improving the reliability of the tube bundle and saving manpower and material resources.

[0023] The present invention adopts a self-locking sleeve structure, realizes the independent installation between the sleeve and the bundle pipe, improves the traditional bundle pipe threading method, simplifies the cumbersome process of traditional bundle pipe threading, and greatly improves the laying efficiency of the bundle pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a front view of the single-core bundle tube of the present invention;

[0026] Figure 2 It is a cross-sectional view of the single-core bundle tube of the present invention along the left view direction;

[0027] Figure 3 It is a schematic diagram of the structure of the sleeve (closed) of the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of the sleeve (open) of the present invention;

[0029] Figure 5 It is a schematic diagram of the matching relationship between the sleeve and the connecting assembly of the present invention;

[0030] Figure 6 It is a schematic diagram of the matching relationship between the single-core bundle tube and the sleeve of the present invention.

[0031] Among them, 1. Single-core bundle tube; 2. Air flow channel; 3. Flexible pressure-resistant grille; 4. Solid steel bar; 5. Connection component; 6. Hinge; 7. Compression spring; 8. Sealing plate; 9. Sleeve. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Reference Figure 1-Figure 6 The present invention provides a pressure-breakage-proof bundle pipe for three-zone testing in coal mine goaf, comprising:

[0035] Single core bundle tube 1;

[0036] A pressure-resistant structure, which is arranged in the single-core bundle tube 1, and an air flow channel 2 is formed between the pressure-resistant structure and the inner wall of the single-core bundle tube 1;

[0037] The sleeve 9 has a rectangular cross-section. The single-core bundle tube 1 is inserted into the sleeve 9. A through groove is provided in the middle of one side of the sleeve 9. A sealing plate 8 is rotatably connected to the through groove.

[0038] A reset component is arranged between the sealing plate 8 and the inner top wall of the sleeve 9, and is used to generate thrust on the sealing plate 8;

[0039] The connecting components 5 are arranged at both ends of the sleeves 9 , and the adjacent sleeves 9 are detachably connected through the connecting components 5 .

[0040] In this embodiment, it is necessary to constrain the sizes of the sleeve 9 and the sealing plate 8. The difference between the straight-line distance between the top wall of the through groove and the opposite side corner of the sleeve 9 and the length of the sealing plate 8 is the maximum diameter of the single-core bundle tube 1. This ensures that the single-core bundle tube 1 can be smoothly inserted into the sleeve 9. At the same time, the sealing plate 8 will not interfere with the single-core bundle tube 1 during the rotation process.

[0041] A further optimized solution is that the pressure-resistant structure includes a solid steel bar 4 coaxially arranged in the single-core bundle tube 1, the diameter of the solid steel bar 4 is smaller than the inner diameter of the single-core bundle tube 1, and a plurality of flexible pressure-resistant grilles 3 are circumferentially evenly spaced between the solid steel bar 4 and the inner wall of the single-core bundle tube 1, and an airflow channel 2 is formed between adjacent flexible pressure-resistant grilles 3.

[0042] In the present embodiment, two flexible pressure-resistant gratings 3 are arranged in a group, and connecting plates are respectively arranged between the two ends of the two flexible pressure-resistant gratings 3, and the connecting plates and the solid steel bars 4 are fixed to the inner wall of the single-core bundle tube 1. The flexible pressure-resistant gratings 3 are of a C-shaped structure, and the opening directions of the two flexible pressure-resistant gratings 3 are opposite. A gap is arranged between the two flexible pressure-resistant gratings 3, so that after the single-core bundle tube 1 is squeezed, the flexible pressure-resistant gratings 3 are deformed, and bending in opposite directions is generated between the two relative flexible pressure-resistant gratings 3. When squeezed to a certain position, the two flexible pressure-resistant gratings 3 abut against each other to generate a reverse force to achieve secondary buffering. At the same time, the flexible pressure-resistant gratings 3 relative to each other between the two groups of flexible pressure-resistant gratings 3 form a channel similar to an elliptical structure, which can be used for gas circulation and will not cause a cut-off effect at the moment of being subjected to external force.

[0043] According to a further optimization scheme, the reset assembly includes a compression spring 7, both ends of which are fixedly connected to the inner wall of the sealing plate 8 and the inner wall of the top of the sleeve 9 respectively, and the compression spring 7 and the top wall of the sleeve 9 and the sealing plate 8 are arranged in a triangular structure.

[0044] According to a further optimization scheme, the connection assembly 5 includes a connection plate, and four groups of connection plates are fixed at both ends of the sleeve 9 respectively. The four groups of connection plates at the same end are arranged symmetrically in pairs, and through holes are opened on the connection plates. The connection plates at both ends of adjacent sleeves 9 are fixedly connected by bolts.

[0045] According to a further optimized solution, a hinge 6 is installed on the top wall of the through slot, and a sealing plate 8 is rotatably connected to the through slot via the hinge 6 .

[0046] According to a further optimized solution, the width of the through groove is smaller than the width of the sleeve 9 , and the bottom of the sealing plate 8 abuts against the inner wall of the sleeve 9 .

[0047] According to a further optimized solution, the diameter of the single-core bundle tube 1 is 10 mm to 14 mm.

[0048] A method for laying a pressure-break-proof bundle pipe for three-zone testing in a coal mine goaf comprises the following steps:

[0049] Step 1: determine the tunnel length and select a single-core bundle tube 1 of corresponding length;

[0050] Step 2: fix the end of the single-core bundle tube 1 at a predetermined position at the corner of the coal mining working face, and arrange the single-core bundle tube 1 along the slot in a direction away from the working face;

[0051] Step 3, determining the length and required number of the sleeves 9 according to the length of the single-core bundle tube 1;

[0052] Step 4, start installing the sleeve 9 from the end of the single-core bundle tube 1. During installation, first push the sealing plate 8, open the sleeve 9, insert the single-core bundle tube 1 into the sleeve 9, loosen the sealing plate 8, and the sealing plate 8 is reset under the action of the reset component. The sleeves 9 are installed on the single-core bundle tube 1 in turn, and the adjacent sleeves 9 are connected by the connecting component 5 to complete the installation of the sleeve 9. Example

[0053] First, arrange the single-core bundle tube 1 in the tunnel according to the preset position, and then install the casing 9 from the end position of the single-core bundle tube 1. The length of the single-core bundle tube 1 is selected according to the actual length of the tunnel, and 200 meters is selected in this embodiment. The length of a single casing 9 is 3 meters, and 66 casings are provided in this embodiment. Then push the sealing plate 8 on the side of the casing 9 inward, and the sealing plate 8 rotates toward the inside of the casing 9 through the hinge 6, and the compression spring 7 is further tightened. At this time, the single-core bundle tube 1 is inserted into the casing 9, and then the sealing plate 8 is released. The sealing plate 8 is reset under the elastic force of the compression spring 7, and the side of the sealing plate 8 is arranged facing the coal wall. Repeat the above steps, and connect the adjacent casings 9 with bolts in pairs through the connecting assembly 5 on the casing 9.

[0054] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0055] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A pressure-break-proof bundle pipe for three-zone testing in coal mine goaf, characterized in that: include: Single core bundle tube (1); A pressure-resistant structure, the pressure-resistant structure being arranged in the single-core bundle tube (1), and an air flow channel (2) being formed between the pressure-resistant structure and the inner wall of the single-core bundle tube (1); A sleeve (9), the cross-sectional shape of the sleeve (9) is rectangular, the single-core bundle tube (1) is inserted into the sleeve (9), a through groove is provided in the middle of a side surface of the sleeve (9), and a sealing plate (8) is rotatably connected to the through groove; a reset component, the reset component being arranged between the sealing plate (8) and the inner top wall of the sleeve (9), the reset component being used to generate a thrust force on the sealing plate (8); A connecting assembly (5), wherein the connecting assembly (5) is arranged at two ends of the sleeve (9), and adjacent sleeves (9) are detachably connected via the connecting assembly (5).

2. The anti-compression-break bundle pipe for three-zone testing in coal mine goaf according to claim 1, characterized in that: The pressure-resistant structure comprises a solid steel bar (4) coaxially arranged in the single-core bundle tube (1), the diameter of the solid steel bar (4) being smaller than the inner diameter of the single-core bundle tube (1), a plurality of flexible pressure-resistant grilles (3) being circumferentially arranged at equal intervals between the solid steel bar (4) and the inner wall of the single-core bundle tube (1), and airflow channels (2) being formed between adjacent flexible pressure-resistant grilles (3).

3. The anti-compression-break bundle pipe for three-zone testing in coal mine goaf according to claim 1, characterized in that: The reset assembly comprises a compression spring (7), the two ends of the compression spring (7) being fixedly connected to the inner wall of the sealing plate (8) and the inner wall of the top of the sleeve (9), respectively, and the compression spring (7) and the top wall of the sleeve (9) and the sealing plate (8) are arranged in a triangular structure.

4. The anti-compression-break bundle pipe for three-zone testing in coal mine goaf according to claim 1, characterized in that: The connection assembly (5) comprises a connection plate, four groups of the connection plates are respectively fixed at both ends of the sleeve (9), and the four groups of the connection plates located at the same end are symmetrically arranged in pairs, through holes are opened on the connection plates, and the connection plates at both ends of adjacent sleeves (9) are fixedly connected by bolts.

5. The anti-compression-break bundle pipe for three-zone testing in coal mine goaf according to claim 1, characterized in that: A hinge (6) is installed on the top wall of the through slot, and the sealing plate (8) is rotatably connected to the through slot via the hinge (6).

6. The anti-compression-break bundle pipe for three-zone testing in coal mine goaf according to claim 1, characterized in that: The width of the through groove is smaller than the width of the sleeve (9), and the bottom of the sealing plate (8) abuts against the inner wall of the sleeve (9).

7. The anti-compression-break bundle pipe for three-zone testing in coal mine goaf according to claim 1, characterized in that: The diameter of the single-core bundle tube (1) is 10 mm-14 mm.

8. A method for laying a three-zone test anti-bundle-break pipe for coal mine goaf, based on the three-zone test anti-bundle-break pipe for coal mine goaf according to any one of claims 1 to 7, characterized in that: The steps include: Step 1: determine the tunnel length and select a single-core bundle tube (1) of corresponding length; Step 2: fix the end of the single-core bundle tube (1) at a predetermined position at the corner of the coal mining working face, and arrange the single-core bundle tube (1) along the slot in a direction away from the working face; Step three, determining the length and required number of sleeves (9) according to the length of the single-core bundle tube (1); Step 4, installing the sleeve (9) from the end of the single-core bundle tube (1). During installation, first push the sealing plate (8), open the sleeve (9), insert the single-core bundle tube (1) into the sleeve (9), loosen the sealing plate (8), and reset the sealing plate (8) under the action of the reset component. Then, install the sleeve (9) on the single-core bundle tube (1) in turn, connect the adjacent sleeves (9) through the connecting component (5), and complete the installation of the sleeve (9).

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