Beam tube sampling head protection device

Abstract

The utility model discloses a beam tube sampling head protection device which is characterized in that the beam tube sampling head protection device comprises a beam tube, a first protection cover and a second protection cover, the beam tube penetrates into the first protection cover from the top, the top of the beam tube is fixedly connected with the top of the first protection cover through a flange, and the second protection cover is arranged on the outer side of the first protection cover in a sleeved mode. The second protection cover is connected with the first protection cover through bolts, a flange plate is installed at the end, away from the beam tube, of the first protection cover, a distance is reserved between the flange plate and the bottom of the beam tube, and a plurality of first vent holes are formed in the first protection cover in the circumferential direction. The first protective cover is arranged on the outer side of the beam tube, the beam tube penetrates into the first protective cover from the top and is fixed with the first protective cover, so that a distance is reserved between the sampling head at the end of the beam tube and the bottom of the first protective cover, and the bottom of the first protective cover is connected with the main pipeline, so that the sampling head at the end of the beam tube is always positioned at a high position; the sampling head at the end part of the beam tube is prevented from being influenced by bottom plate accumulated water and grouting water.

Description

Technical Field

[0001] The utility model relates to the technical field of bundled tubes in underground coal mines, in particular to a bundled tube sampling head protection device. Background Art

[0002] Fire prevention and extinguishing have always been a key focus of coal mine safety production. According to statistical reports, my country's currently mined No. 2 coal seam is a Class I spontaneously combustible coal seam, with a minimum natural combustion period of 39 days. Therefore, effective monitoring methods must be implemented to determine the oxidation status of residual coal in the goaf and take targeted measures to prevent spontaneous combustion fires. In accordance with the "Coal Mine Safety Regulations" and the design requirements for fire prevention and extinguishing in the mining face, bundle tubes are installed in the corner goafs of the working face belt chute and return air chute, and bundle tube sampling heads are pre-embedded to monitor characteristic gas changes in the goaf. However, the pre-embedded bundle tube sampling heads are easily affected by large impurities such as coal slime and ash, or by water accumulation in the floor, resulting in sampling failure or distorted sampling. This in turn results in missing data at the sampling point, making it impossible to determine whether there are signs of fire in the goaf. Therefore, a device to protect the bundle tube sampling heads is needed. Utility Model Content

[0003] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art and provide a bundle tube sampling head protection device. The present invention provides a first protective cover on the outside of the bundle tube. The length of the first protective cover is greater than the length of the bundle tube. The bundle tube passes through the first protective cover from the top and is fixed to the first protective cover, so that a distance is left between the sampling head at the end of the bundle tube and the bottom of the first protective cover. The bottom of the first protective cover is connected to the main pipeline, so that the sampling head at the end of the bundle tube is always located at a high position, thereby preventing the sampling head at the end of the bundle tube from being affected by water accumulated on the bottom plate and grouting water.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a bundle tube sampling head protection device, comprising a bundle tube, a first protective cover and a second protective cover, the bundle tube passes through the first protective cover from the top, the top of the bundle tube is fixedly connected to the top of the first protective cover by a flange, the first protective cover is perpendicular to the horizontal direction, the second protective cover is sleeved on the outside of the first protective cover, the second protective cover is connected to the first protective cover by bolts, a flange is installed at the end of the first protective cover away from the bundle tube, a distance is left between the flange and the bottom of the bundle tube, and a plurality of first ventilation holes are arranged circumferentially on the first protective cover.

[0005] Preferably, the length of the first protective cover is 1500 mm, the diameter of the first protective cover is 50 mm, and the top of the first protective cover is at the same height as the top of the bundle tube.

[0006] Preferably, the diameter of the first ventilation holes is 10 mm, and a distance is left between every two adjacent first ventilation holes.

[0007] Preferably, the length of the second protective cover is 250 mm, a distance is left between the inner wall of the second protective cover and the outer wall of the first protective cover, and the top of the second protective cover is closed.

[0008] Preferably, the bolt is provided at a position 110 mm from the bottom of the second protective cover, and the bolt is perpendicular to the first protective cover and the second protective cover respectively.

[0009] Preferably, the length of the bundle tube is 180 mm, the diameter of the bundle tube is 46 mm, and a sampling head is installed at the bottom of the bundle tube.

[0010] Preferably, a plurality of second ventilation holes are provided at intervals on the side wall of the bundle tube, and the diameter of the second ventilation holes is 5 mm.

[0011] Preferably, the bolts are M16*55mm bolts.

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

[0013] 1. The utility model sets a first protective cover on the outside of the bundle tube. The length of the first protective cover is greater than that of the bundle tube. The bundle tube passes through the first protective cover from the top and is fixed to the first protective cover, so that there is a distance between the sampling head at the end of the bundle tube and the bottom of the first protective cover. The bottom of the first protective cover is connected to the main pipeline, so that the sampling head at the end of the bundle tube is always located at a high position, avoiding the sampling head at the end of the bundle tube from being affected by water accumulated on the bottom plate and grouting water.

[0014] 2. The first protective cover of the utility model is circumferentially provided with a plurality of first vent holes, which can block large particles of impurities such as coal ash and coal slime while ensuring the air intake, thereby ensuring the cleanliness of the sampling head at the end of the bundle tube.

[0015] 3. A second protective cover is provided outside the first protective cover of the present invention. A distance is left between the inner wall of the second protective cover and the outer wall of the first protective cover. The top of the second protective cover is closed and the side wall is fixedly connected to the first protective cover, thereby further achieving the function of blocking large particles of impurities such as coal ash and coal slime.

[0016] The present invention will be described in further detail below through the accompanying drawings and examples. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the present utility model.

[0018] Description of the accompanying drawings:

[0019] 1—Bundle tube; 2—First protective cover; 3—Second protective cover;

[0020] 4—flange; 5—first vent hole; 6—bolt;

[0021] 7—Sampling head; 8—Second vent hole. DETAILED DESCRIPTION

[0022] like Figure 1 As shown, the utility model includes a bundle tube 1, a first protective cover 2 and a second protective cover 3. The bundle tube 1 passes through the first protective cover 2 from the top, and the top of the bundle tube 1 is fixedly connected to the top of the first protective cover 2 by a flange. The first protective cover 2 is perpendicular to the horizontal direction. The second protective cover 3 is sleeved on the outside of the first protective cover 2. The second protective cover 3 is connected to the first protective cover 2 by bolts 6. A flange 4 is installed at the end of the first protective cover 2 away from the bundle tube 1. A distance is left between the flange 4 and the bottom of the bundle tube 1. The first protective cover 2 is circumferentially provided with a plurality of first vent holes 5.

[0023] After the bundled tube 1 passes through the first protective cover 2 from the top, the bundled tube 1 and the first protective cover 2 are fixedly connected by a flange, so that the positions of the bundled tube 1 and the first protective cover 2 are relatively fixed to prevent the bundled tube 1 from tilting. A fixed distance is maintained between the bottom of the bundled tube 1 and the bottom of the first protective cover 2. The second protective cover 3 is sleeved on the first protective cover 2 and fixed to the position of the second protective cover 3 by bolts 6, so that the distance between the inner wall of the second protective cover 3 and the outer wall of the first protective cover 2 remains unchanged, further playing a role in preventing coal ash and coal slime. The first protective cover 2 is connected to the main pipeline by a flange 4, so that the first protective cover 2 and the main pipeline form a three-way pipeline. The first protective cover 2 is perpendicular to the horizontal direction, so that the bundled tube 1 is always in a high position, preventing water accumulation on the bottom plate or grouting water from affecting the bundled tube 1. A plurality of first ventilation holes 5 are provided around the first protective cover 2 to prevent coal ash and coal slime from entering, thereby ensuring the cleanliness of the environment in which the bundled tube 1 is located.

[0024] The length of the first protective cover 2 is 1500 mm, the diameter of the first protective cover 2 is 50 mm, and the top of the first protective cover 2 is at the same height as the top of the bundle tube 1 .

[0025] The length of the first protective cover 2 is set according to the appropriate height of the tunnel processing. According to the on-site conditions, the length of the first protective cover 2 can be set to 1500mm or 2000mm. There is no limit on the length of the first protective cover 2. Since the bundle tube 1 is set on the top of the first protective cover 2, the length of the first protective cover 2 is the waterproof height of the bundle tube 1.

[0026] The diameter of the first ventilation holes 5 is 10 mm, and a distance is left between every two adjacent first ventilation holes 5 .

[0027] The first air vent 5 is set at a distance of 250 mm from the bottom of the first protective cover 2. The central angle of two adjacent first air vents 5 at the same height is 120 degrees, and the center distance between two adjacent first air vents 5 in the vertical direction is 250 mm. Multiple first air vents 5 are set on the first protective cover 2. The multiple first air vents 5 ensure the air intake while blocking large particles of impurities such as coal ash and coal slime.

[0028] Furthermore, in order to facilitate the extraction of gas samples, a plurality of first air holes 5 are provided near the bundle tube 1 in the first protective cover 2 to increase the density of the first air holes 5. The central angle between two adjacent first air holes 5 at the same height is 60 degrees or 30 degrees, and the distance between the centers of two adjacent first air holes 5 in the vertical direction is 150 mm or 100 mm. The specific density is set according to the on-site conditions.

[0029] The length of the second protective cover 3 is 250 mm. There is a distance between the inner wall of the second protective cover 3 and the outer wall of the first protective cover 2 . The top of the second protective cover 3 is closed.

[0030] The top of the second protective cover 3 is closed, which makes it easy to put the second protective cover 3 on the outside of the top of the first protective cover 2. The diameter of the second protective cover 3 is 80 mm, so that there is a distance between the second protective cover 3 and the first protective cover 2, and the gas can enter the gap between the first protective cover 2 and the second protective cover 3. The second protective cover 3 can block external coal ash and coal slime. At the same time, the second protective cover 3 can also ensure that the bundle tube 1 continues to sample when the roof of the goaf collapses.

[0031] The bolt 6 is provided on the second protective cover 3 at a distance of 110 mm from the bottom, and the bolt 6 is perpendicular to the first protective cover 2 and the second protective cover 3 respectively.

[0032] The threaded end of the bolt 6 passes through the second protective cover 3 and is welded to the side wall of the first protective cover 2. The bolt 6 is located at the second protective cover 3 and is welded to the second protective cover 3, so that the position of the second protective cover 3 is fixed relative to the first protective cover 2 to prevent the second protective cover 3 from shaking.

[0033] Furthermore, a threaded hole is provided at a position 110 mm from the bottom of the second protective cover 3, and a threaded hole of the same diameter is provided at a corresponding position on the first protective cover 2. Bolts 6 pass through the second protective cover 3 and are threadedly connected to the first protective cover 2, thereby fixing the second protective cover 3 relative to the first protective cover 2. The threaded connection via bolts 6 facilitates installation and can be easily disassembled after use, thereby improving the convenience of using the device.

[0034] The length of the bundle tube 1 is 180 mm, the diameter of the bundle tube 1 is 46 mm, and a bundle tube sampling head 7 is installed at the bottom of the bundle tube 1.

[0035] The length of the bundle tube 1 is smaller than that of the second protective cover 3, which facilitates the second protective cover 3 to protect the bundle tube 1. The diameter of the bundle tube 1 is smaller than that of the first protective cover 2, which facilitates the bundle tube 1 to penetrate into the first protective cover 2, so that the first protective cover 2 can protect the bundle tube sampling head 7 at the bottom of the bundle tube 1.

[0036] A plurality of second ventilation holes 8 are provided at intervals on the side wall of the bundle tube 1 , and the diameter of the second ventilation holes 8 is 5 mm.

[0037] The second vent holes 8 are vent holes with small apertures, which can further block coal ash and coal slime.

[0038] Bolt 6 is an M16*55mm bolt. An M16*55mm bolt means the bolt has a diameter of 16mm and a length of 55mm.

[0039] The utility model discloses a bundle tube sampling head protection device, which ensures that the sampling head 8 is not affected by bottom plate water and grouting water during the sampling process by arranging a 1500mm long first protective cover 2 on the outside of the bundle tube 1. At the same time, a plurality of first air vents 5 are arranged in the circumference of the first protective cover 2 to ensure the air intake while preventing impurities such as coal slime and coal ash from entering the first protective cover 2 and affecting the sampling accuracy of the sampling head 8. In order to improve the protection strength of the bundle tube 1, a second protective cover 3 is sleeved on the first protective cover 2. The second protective cover 3 is fixedly connected to the first protective cover 2 by bolts 6, and a gap is left between the second protective cover 3 and the first protective cover 2 to prevent the second protective cover 3 from affecting the air intake.

[0040] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural transformation made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A bundle tube sampling head protection device, characterized by: The invention comprises a bundle tube (1), a first protective cover (2) and a second protective cover (3); the bundle tube (1) penetrates into the first protective cover (2) from the top; the top of the bundle tube (1) is fixedly connected to the top of the first protective cover (2) via a flange; the first protective cover (2) is perpendicular to the horizontal direction; the second protective cover (3) is sleeved on the outside of the first protective cover (2); the second protective cover (3) is connected to the first protective cover (2) via bolts (6); a flange (4) is installed at the end of the first protective cover (2) away from the bundle tube (1); a distance is left between the flange (4) and the bottom of the bundle tube (1); and a plurality of first vent holes (5) are circumferentially arranged on the first protective cover (2).

2. A bundle tube sampling head protection device according to claim 1, characterized in that: The length of the first protective cover (2) is 1500 mm, the diameter of the first protective cover (2) is 50 mm, and the top of the first protective cover (2) is at the same height as the top of the bundle tube (1).

3. A bundle tube sampling head protection device according to claim 1, characterized in that: The diameter of the first ventilation holes (5) is 10 mm, and a distance is left between every two adjacent first ventilation holes (5).

4. A bundle tube sampling head protection device according to claim 1, characterized in that: The length of the second protective cover (3) is 250 mm, a distance is left between the inner side wall of the second protective cover (3) and the outer side wall of the first protective cover (2), and the top of the second protective cover (3) is closed.

5. A bundle tube sampling head protection device according to claim 4, characterized in that: The bolt (6) is arranged at a position 110 mm from the bottom of the second protective cover (3), and the bolt (6) is perpendicular to the first protective cover (2) and the second protective cover (3), respectively.

6. A bundle tube sampling head protection device according to claim 1, characterized in that: The length of the bundle tube (1) is 180 mm, the diameter of the bundle tube (1) is 46 mm, and a sampling head (7) is installed at the bottom of the bundle tube (1).

7. A bundle tube sampling head protection device according to claim 6, characterized in that: A plurality of second ventilation holes (8) are provided at intervals on the side wall of the bundle tube (1), and the diameter of the second ventilation holes (8) is 5 mm.

8. The bundle tube sampling head protection device according to claim 1, characterized in that: The bolt (6) is an M16*55mm bolt.

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