Device for measuring coal seam gas extraction radius

Abstract

The utility model relates to the technical field of gas extraction, and discloses a coal seam gas extraction radius measuring device which comprises a fixed ruler, a sliding groove is formed in the top of the interior of the fixed ruler in a penetrating mode, a sliding ruler is slidably connected to the rear portion of the interior of the sliding groove in a penetrating mode, and connecting frames are arranged on the front portion of the fixed ruler and the rear portion of the sliding ruler. A horizontal groove is formed in the two sides of the interior of the connecting frame in a penetrating mode, two sliding blocks are symmetrically and slidably connected to the interior of the horizontal groove, lifting grooves are formed in the close sides of the two sliding blocks, a lifting block is slidably connected between the two sliding blocks through the two lifting grooves, and the top of the lifting block penetrates through the top of the connecting frame to be rotationally connected with a connecting rod; the bottoms of the two sliding blocks penetrate through the horizontal grooves and are fixedly connected with the clamping plates, and compared with a traditional measuring mode, due to the arrangement of the clamping plates, due to the fact that the device does not need to be aligned with the 0 scale line, measurement is more accurate.

Description

Technical Field

[0001] This utility model relates to the field of gas extraction technology, specifically to a device for measuring the radius of gas extraction in coal seams. Background Technology

[0002] During coal seam gas drainage, it is necessary to measure the distance between two gas drainage holes. If the distance is too large, the gas drainage coverage may be insufficient, resulting in some areas of gas not being fully extracted and increasing the risk of gas accidents. On the other hand, if the distance is too small, it may lead to waste of resources, increase construction costs, and may also cause mutual interference, affecting drainage efficiency. Therefore, a measuring device is needed to measure the distance between the two gas drainage holes.

[0003] Chinese Patent Publication No. CN221744845U discloses a measuring ruler, including a first ruler body, a second ruler body rotatably connected to the top side wall of one end of the first ruler body, a first groove formed on the side wall of one end of both the first and second ruler bodies, a first magnet and a first iron sheet respectively provided in the two first grooves, the first magnet and the first iron sheet being attracted to each other; a second groove formed on the side wall of both the first and second ruler bodies, the two second grooves being arranged opposite each other, a second magnet and a second iron sheet respectively provided in the two second grooves, the second magnet and the second iron sheet being attracted to each other.

[0004] The aforementioned patent, through the cooperation of components such as the first ruler, extension plate, luminous plate, and threaded rod, allows for the measurement of longer objects by extending the extension plate, which is less prone to bending during measurement, thus improving measurement efficiency. The operation is simple, convenient, and quick. However, when measuring the gas extraction radius, the gas extraction hole needs to be aligned with the "0" mark on the ruler for distance measurement. This alignment with the "0" mark introduces errors, resulting in inaccurate measurement results. Therefore, this utility model proposes a device for determining the radius of coal seam gas extraction. Utility Model Content

[0005] The purpose of this invention is to provide a device for measuring the radius of coal seam gas extraction. By setting a clamping plate, compared with the traditional measurement method, it does not need to be aligned with the "0" scale line, thus making the measurement more accurate.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for measuring the radius of coal seam gas extraction, comprising a fixed ruler, a groove extending through the top of the fixed ruler, a sliding ruler slidably connected through the rear of the groove, a connecting frame provided at the front of the fixed ruler and the rear of the sliding ruler, horizontal grooves extending through both sides of the connecting frame, two sliders symmetrically slidably connected inside the horizontal grooves, lifting grooves provided on the adjacent sides of the two sliders, a lifting block slidably connected between the two sliders through the two lifting grooves, a connecting rod rotatably connected through the top of the lifting block through the top of the connecting frame, and clamps fixedly connected through the horizontal grooves at the bottom of the two sliders.

[0007] Preferably, a rubber pad is fixedly connected to the side of the clamping plate.

[0008] Preferably, the lifting groove is inclined, the lifting block is in the shape of a trapezoidal platform, and the bottom area of ​​the lifting block is larger than the top area.

[0009] Preferably, the outer surface of the connecting rod is symmetrically fixedly connected to two locking blocks near the bottom. The interior of the connecting frame extends through the top and communicates with the horizontal groove, and a locking groove is opened. A locking ring is rotatably connected to the top of the connecting frame, and a locking groove is also opened at the bottom of the locking ring extending through the top. The two locking blocks and the connecting rod as a whole are adaptively matched with the locking groove.

[0010] Preferably, the connecting frame at the front is fixedly connected to the front of the fixed ruler, the connecting frame at the rear is fixedly connected to the front of the connecting block, the sliding ruler has a straight groove extending through the rear, a limit block is provided at one end of the straight groove inside the sliding ruler, the connecting block is rotatably connected to the front of the connecting block, one end of the straight rod is fixedly connected to the limit block, and the top of the connecting rod at the rear is fixedly connected to a carving knife.

[0011] Preferably, the straight rod and the straight groove are adaptively matched, and the limiting block and the limiting groove are adaptively matched.

[0012] Preferably, the connecting block does not contact the rear of the sliding ruler.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1) By setting clamps, the measurement steps involve first inserting two sets of clamps into the two gas extraction holes, and then observing the scale values ​​on the fixed ruler and the sliding ruler. Therefore, compared with the traditional measurement method, this method is more accurate because it does not require aligning with the "0" scale line.

[0015] 2) When the diameter of the gas extraction hole is smaller than the clamping plate spacing, the slider is forced to slide by pulling the upper connecting rod to shorten the clamping plate spacing. This can adapt to gas extraction holes of different diameters for distance measurement, which greatly improves the applicability and flexibility of the measuring device, enabling it to cope with various gas extraction holes of different specifications and avoiding the problem of inaccurate distance measurement due to hole diameter mismatch.

[0016] 3) After confirming that the distance meets the standard, the markings are directly made by using a carving knife to turn out a new gas extraction hole, which greatly improves the construction efficiency, reduces the tedious steps of repeatedly using a fixed ruler and a sliding ruler to determine the distance, and saves time and labor costs. At the same time, this operation method ensures the accuracy of the spacing of the new gas extraction hole, guarantees the reliability and stability of the entire extraction system, and provides a strong guarantee for subsequent gas extraction work. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a coal seam gas extraction radius measuring device according to an embodiment of the present invention;

[0018] Figure 2 This is a sectional view of the connecting frame in an embodiment of the present utility model;

[0019] Figure 3 This is an exploded view of the internal structure of the connecting frame in an embodiment of this utility model;

[0020] Figure 4 This is a cross-sectional view of the sliding ruler in an embodiment of this utility model.

[0021] In the diagram: 1. Fixed ruler; 2. Connecting frame; 3. Slide groove; 4. Sliding ruler; 5. Sliding block; 6. Lifting groove; 7. Lifting block; 8. Connecting rod; 9. Locking block; 10. Locking ring; 11. Clamping plate; 12. Rubber pad; 13. Horizontal groove; 14. Straight groove; 15. Limiting groove; 16. Limiting block; 17. Straight rod; 18. Connecting block; 19. Carving knife. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] Combination Figures 1-4A device for measuring the radius of coal seam gas extraction includes a fixed ruler 1. A groove 3 is provided through the top of the fixed ruler 1. A sliding ruler 4 is slidably connected through the rear of the groove 3. A connecting frame 2 is provided at the front of the fixed ruler 1 and the rear of the sliding ruler 4. A horizontal groove 13 is provided through both sides of the connecting frame 2. Two sliders 5 are symmetrically slidably connected inside the horizontal groove 13. A lifting groove 6 is provided on the adjacent side of the two sliders 5. A lifting block 7 is slidably connected between the two sliders 5 through the two lifting grooves 6. A connecting rod 8 is rotatably connected through the top of the lifting block 7 through the top of the connecting frame 2. A clamping plate 11 is fixedly connected through the horizontal groove 13 at the bottom of the two sliders 5.

[0025] In actual operation, the two front clamps 11 are inserted into one of the gas extraction holes. The two clamps 11 will press against the inside of the gas extraction hole. The rubber pad 12 can be used for anti-slip operation. Then, slide the sliding ruler 4 along the slide groove 3 so that the two rear clamps 11 are facing the other gas extraction hole. At this time, insert the two rear clamps 11 into the inside of the other gas extraction hole. Then read the length scale on the fixed ruler 1 and the sliding ruler 4 to measure the distance between the two gas extraction holes. This allows us to determine whether the distance between the two gas extraction holes meets the extraction construction standards of the coal seam.

[0026] Specifically, when the diameter of the gas extraction hole is smaller than the distance between the two clamping plates 11, making it impossible for the two clamping plates 11 to be inserted into the gas extraction hole, the connecting rod 8 is pulled up, and the two lifting grooves 6 force the two sliders 5 to slide closer to each other along the horizontal groove 13, thereby shortening the distance between the two clamping plates 11, and thus enabling distance measurement of gas extraction holes with smaller diameters.

[0027] See Figure 2 A rubber pad 12 is fixedly connected to the side of the clamp 11.

[0028] The lifting groove 6 is inclined, the lifting block 7 is in the shape of a trapezoidal platform, and the bottom area of ​​the lifting block 7 is larger than the top area.

[0029] See Figure 3 Two locking blocks 9 are symmetrically fixed to the bottom of the outer surface of the connecting rod 8. The inside of the connecting frame 2 extends through the top and communicates with the horizontal groove 13, and a locking groove is opened. A locking ring 10 is rotatably connected to the top of the connecting frame 2. The bottom of the locking ring 10 extends through the top and a locking groove is also opened. The two locking blocks 9 and the connecting rod 8 are adapted to the locking groove.

[0030] Specifically, pull the connecting rod 8 up until the top of the locking block 9 and the locking ring 10. At this time, rotating the locking ring 10 will cause the locking groove on the locking ring 10 to be misaligned with the locking block 9, thereby preventing the locking block 9 from moving down and thus fixing the connecting rod 8. Therefore, its lifting block 7, slider 5 and clamping plate 11 are all fixed, preventing the clamping plate 11 from shaking when the device is not in use, which could lead to damage to the device.

[0031] See Figure 4 The front connecting frame 2 is fixedly connected to the front of the fixed ruler 1. The front of the rear connecting frame 2 is fixedly connected to the connecting block 18. The interior of the sliding ruler 4 has a straight groove 14 extending through the rear. The interior of the sliding ruler 4 has a limit block 16 at one end of the straight groove 14. The front of the connecting block 18 is rotatably connected to a straight rod 17. One end of the straight rod 17 is fixedly connected to the limit block 16. The top of the rear connecting rod 8 is fixedly connected to a carving knife 19.

[0032] Specifically, when the distance between two gas extraction holes meets the extraction construction standard, first pull out the clamp 11 inserted into the other gas extraction hole, and then rotate 180 degrees along the straight groove 14 through the straight rod 17 and the limiting block 16 so that the engraving knife 19 contacts the coal seam. At this time, rotate the entire device along one of the gas extraction holes so that the engraving knife 19 makes a mark on the coal seam surface. A new gas extraction hole is directly turned out on the mark. The distance of the gas extraction hole still meets the extraction construction standard, so that after the extraction radius is measured, a gas extraction hole of the length that meets the extraction construction standard can be directly turned out.

[0033] See Figure 4 The straight rod 17 is adapted to the straight groove 14, and the limiting block 16 is adapted to the limiting groove 15.

[0034] See Figure 4 The connecting block 18 does not contact the rear of the sliding ruler 4.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for determining the radius of coal seam gas extraction, comprising a fixed ruler (1), characterized in that, The fixed ruler (1) has a sliding groove (3) through the top of its interior. The sliding ruler (4) is slidably connected through the rear of the sliding groove (3). A connecting frame (2) is provided at the front of the fixed ruler (1) and the rear of the sliding ruler (4). A horizontal groove (13) is provided through both sides of the connecting frame (2). Two sliders (5) are symmetrically slidably connected inside the horizontal groove (13). A lifting groove (6) is provided on the adjacent side of the two sliders (5). A lifting block (7) is slidably connected between the two sliders (5) through the two lifting grooves (6). A connecting rod (8) is rotatably connected through the top of the connecting frame (2) at the top of the lifting block (7). A clamp (11) is fixedly connected through the horizontal groove (13) at the bottom of the two sliders (5).

2. The device for determining the radius of coal seam gas extraction according to claim 1, characterized in that: A rubber pad (12) is fixedly connected to the side of the clamp (11).

3. The device for determining the radius of coal seam gas extraction according to claim 1, characterized in that: The lifting groove (6) is inclined, the lifting block (7) is in the shape of a trapezoidal platform, and the bottom area of ​​the lifting block (7) is larger than the top area.

4. The device for determining the radius of coal seam gas extraction according to claim 1, characterized in that: Two locking blocks (9) are symmetrically fixed to the bottom of the outer surface of the connecting rod (8). The inside of the connecting frame (2) extends through the top and communicates with the horizontal groove (13) and has a locking groove. The top of the connecting frame (2) is rotatably connected to a locking ring (10). The bottom of the locking ring (10) extends through the top and also has a locking groove. The two locking blocks (9) and the connecting rod (8) are compatible with the locking groove.

5. The device for determining the radius of coal seam gas extraction according to claim 1, characterized in that: The connecting frame (2) at the front is fixedly connected to the front of the fixed ruler (1). The connecting frame (2) at the rear is fixedly connected to the front of the connecting block (18). The sliding ruler (4) has a straight groove (14) running through its rear. The sliding ruler (4) has a limit block (16) at one end of the straight groove (14). The connecting block (18) is rotatably connected to the front of the straight rod (17). The limit block (16) is fixedly connected to one end of the straight rod (17). The top of the connecting rod (8) at the rear is fixedly connected to a carving knife (19).

6. The device for determining the radius of coal seam gas extraction according to claim 5, characterized in that: The straight rod (17) is adapted to the straight groove (14), and the limiting block (16) is adapted to the limiting groove (15).

7. The device for determining the radius of coal seam gas extraction according to claim 5, characterized in that: The connecting block (18) does not contact the rear of the sliding ruler (4).

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