Drilling device for gas drainage

Abstract

The utility model discloses a drilling device for gas drainage, which relates to the technical field of gas drainage, and comprises a shroud positioned on the side wall of a rock stratum and a bottom plate positioned on the ground, the outer part of the rock stratum is provided with a positioning reamed hole, the inner side of the shroud is fixedly connected with a positioning plate, and the outer part of the positioning plate is provided with a positioning hole. A mounting frame is slidably connected to the upper side of the bottom plate, a drilling mechanism is fixedly connected to the upper side of the mounting frame, two symmetrically-arranged semicircular sealing plates are slidably connected to the outer portion of the positioning plate, a positioning mechanism is mounted on the outer portions of the semicircular sealing plates, plugging blocks are fixedly connected to the outer portions of the semicircular sealing plates, and auxiliary rotating mechanisms are mounted on the inner sides of the semicircular sealing plates. According to the device, the drilling position can be accurately determined, gaps are effectively blocked in the drilling process, the sealing performance is guaranteed, meanwhile, through cooperation of the pin rollers and the drilling rod, the friction force between the drilling rod and the sealing structure is reduced, the drilling process is guaranteed to be smooth, and therefore the gas pumping and discharging efficiency is improved, and construction safety is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gas extraction drilling device. BACKGROUND

[0002] In the tunnel construction process, gas extraction is an important link to ensure construction safety. Gas is a flammable and explosive gas, which is easy to cause safety accidents if accumulated in the tunnel. Therefore, how to efficiently and safely extract gas has become one of the key technical problems in tunnel construction.

[0003] The traditional gas extraction method usually adopts drilling extraction technology, that is, drilling holes on the sidewall of the tunnel to extract gas through the holes. However, the existing drilling device has some problems in the construction process. First, the friction between the drill rod and the sealing structure is large during the drilling process, which easily causes the drill rod to be disturbed, affects the smoothness of drilling, and thus reduces the construction efficiency. Second, due to the insufficient sealing of the sealing structure, the gap between the drill hole and the drill rod easily causes gas leakage, which not only reduces the extraction efficiency but also may cause safety hazards. Therefore, in view of the above technical problems, a drilling device for gas extraction is proposed. SUMMARY

[0004] The utility model aims at providing a drilling device for gas extraction, which can accurately determine the drilling position and effectively seal the gap during drilling to ensure the sealing performance. At the same time, by cooperating the roller with the drill rod, the friction between the drill rod and the sealing structure is reduced to ensure smooth drilling, thereby improving the gas extraction efficiency and ensuring construction safety.

[0005] The utility model realizes the following technical scheme:

[0006] A drilling device for gas extraction, comprising a surrounding cylinder positioned on the sidewall of the rock stratum and a bottom plate positioned on the ground. The rock stratum has a positioning hole drilled on the outside, and the installation position of the surrounding cylinder corresponds to the positioning hole. The inner side of the surrounding cylinder is fixedly connected with a positioning plate, and the outer side of the positioning plate is provided with a positioning hole. The upper side of the bottom plate is slidably connected with a mounting bracket, and the upper side of the mounting bracket is fixedly connected with a drilling mechanism. The outer side of the positioning plate is slidably connected with two groups of symmetrically arranged semicircular sealing plates. The outer side of the semicircular sealing plate is provided with a positioning mechanism, and the inner side of the semicircular sealing plate is fixedly connected with a sealing block. The inner side of the semicircular sealing plate is provided with an auxiliary rotating mechanism.

[0007] Preferably, one side of the surrounding cylinder is fixedly connected with a first rivet, and the first rivet is embedded in the sidewall of the rock stratum. The outer side of the surrounding cylinder is fixedly connected with an air suction pipe, and the air suction pipe is connected with a gas extraction pump.

[0008] Preferably, the bottom of the bottom plate is fixedly connected with a second rivet, and the second rivet is embedded in the ground, and the bottom plate is positioned on the ground through the second rivet.

[0009] Preferably, the upper side of the bottom plate is provided with a first sliding groove, and the bottom of the mounting frame is fixedly connected with a sliding plate which is slidingly connected to the inner side of the first sliding groove.

[0010] Preferably, the drilling mechanism comprises a vertical plate, a drilling motor, a drill rod and a drill bit, the vertical plate is fixedly connected to the upper side of the mounting frame, the height of the vertical plate corresponds to the positioning counterbore, the drilling motor is fixedly connected to one side of the vertical plate, the drill rod is fixedly connected to one side of the drilling motor and penetrates the inner side of the positioning hole, and the drill bit is fixedly connected to the distal end of the drill rod and is located in the inner side of the positioning counterbore.

[0011] Preferably, the positioning mechanism comprises a connecting plate and a fixing bolt, the outer side of the positioning plate is provided with a second sliding groove, the connecting plate is fixedly connected to the outer side of the semicircular sealing plate, one side of the connecting plate is fixedly connected with a sliding block which is slidingly connected to the inner side of the second sliding groove, and the fixing bolt is threadedly connected with the two connecting plates.

[0012] Preferably, the sealing block is made of elastic material.

[0013] Preferably, the auxiliary rotating mechanism comprises a mounting groove, a fixed rod and a roller, the mounting groove is provided in the inner side of the semicircular sealing plate, the fixed rod is fixedly connected to the inner side of the mounting groove, and the roller is rotatably connected to the outer side of the fixed rod and abuts against the drill rod.

[0014] The technical scheme of the utility model has at least the following beneficial effects:

[0015] The drilling device for gas extraction disclosed by the utility model can accurately determine the drilling position and quickly complete the positioning counterbore construction, avoids the drilling deviation problem caused by inaccurate positioning in the traditional method, and effectively seals the gap between the drill hole and the drill rod by combining the semicircular sealing plate and the elastic sealing block, thereby ensuring the sealing property in the gas extraction process, preventing gas leakage, improving the extraction efficiency and reducing the safety hazards, and further, the cooperation between the roller and the drill rod greatly reduces the friction between the drill rod and the sealing structure, so that the drill rod can rotate freely during drilling, avoids the poor drilling problem caused by excessive friction in the traditional device, and thereby improves the smoothness of drilling and the construction efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the utility model.

[0017] Figure 2 for Figure 1 enlarged view of A;

[0018] Figure 3 for Figure 1 enlarged view of B;

[0019] Figure 4 is a first partial structure schematic view of the utility model;

[0020] Figure 5 is a first partial structure schematic view of the utility model;

[0021] Figure 6 for Figure 5 enlarged view of C;

[0022] Figure 7 for Figure 4 enlarged view of D;

[0023] Reference signs: 1, rock stratum; 2, surrounding cylinder; 3, first rivet; 4, positioning counterbore; 5, air suction pipe; 6, positioning plate; 7, positioning hole; 8, bottom plate; 9, second rivet; 10, mounting frame; 11, first sliding groove; 12, sliding plate; 13, vertical plate; 14, drilling motor; 15, drill rod; 16, drill bit; 17, semicircular sealing plate; 18, connecting plate; 19, second sliding groove; 20, sliding block; 21, fixing bolt; 22, sealing block; 23, mounting groove; 24, fixing rod; 25, roller. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] Please refer to Figures 1-7The utility model provides a kind of drilling device for gas extraction, including the surrounding cylinder 2 positioned in the side wall of rock stratum 1 and the bottom plate 8 positioned on ground, and rock stratum 1 is externally provided with positioning chamber 4, and the installation position of surrounding cylinder 2 corresponds between positioning chamber 4, the inside of surrounding cylinder 2 is fixedly connected with positioning plate 6, the outside of positioning plate 6 is provided with positioning hole 7, the upper side of bottom plate 8 is slidably connected with mounting bracket 10, the upper side of mounting bracket 10 is fixedly connected with drilling mechanism, the outside of positioning plate 6 is slidably connected with two groups of symmetrical half-round sealing plate 17, positioning mechanism is installed on the outside of half-round sealing plate 17, half-round sealing plate 17 is fixedly connected with blocking piece 22 on the outside, and two groups of blocking piece 22 are close between, and auxiliary rotating mechanism is installed on the inside of half-round sealing plate 17.

[0026] The side of surrounding cylinder 2 is fixedly connected with first rivet 3, and first rivet 3 is embedded in the side wall of rock stratum 1, and the outside of surrounding cylinder 2 is fixedly connected with suction pipe 5, and suction pipe 5 is connected with gas extraction pump, and surrounding cylinder 2 is firmly fixed in the side wall of rock stratum 1 by first rivet 3, to ensure the stability of the device during drilling, and the connection of suction pipe 5 and gas extraction pump realizes the rapid extraction of gas.

[0027] The bottom of bottom plate 8 is fixedly connected with second rivet 9, and second rivet 9 is embedded in ground, and bottom plate 8 is positioned on ground by second rivet 9, and second rivet 9 fixes bottom plate 8 on ground, to provide stable support for the whole device, to ensure that the device does not displace or tilt during drilling.

[0028] The upper side of bottom plate 8 is provided with first sliding groove 11, and the bottom of mounting bracket 10 is fixedly connected with sliding plate 12, and sliding plate 12 is slidably connected to the inside of first sliding groove 11, and the sliding connection design of sliding plate 12 and first sliding groove 11 enables mounting bracket 10 to move flexibly, to facilitate adjusting drilling position, to improve the accuracy and efficiency of construction.

[0029] Drilling mechanism includes vertical plate 13, drilling motor 14, drill rod 15 and drill bit 16, vertical plate 13 is fixedly connected to the upper side of mounting bracket 10, and the height of vertical plate 13 corresponds between positioning chamber 4, drilling motor 14 is fixedly connected to one side of vertical plate 13, drill rod 15 is fixedly connected to one side of drilling motor 14, and drill rod 15 passes through the inside of positioning hole 7, drill bit 16 is fixedly connected to the end of drill rod 15, and drill bit 16 is located in the inside of positioning chamber 4, and the height of vertical plate 13 corresponds with positioning chamber 4, to ensure that drill bit 16 can accurately enter positioning chamber 4, and drilling motor 14 drives drill rod 15 and drill bit 16 to complete drilling operation, and the structure design is reasonable and efficient.

[0030] The positioning mechanism comprises connecting plates 18 and fixing bolts 21, the outer portion of the positioning plate 6 is provided with a second sliding groove 19, the connecting plates 18 are fixedly connected to the outer portion of the semicircular sealing plate 17, one side of the connecting plate 18 is fixedly connected with a sliding block 20 which is slidingly connected to the inner side of the second sliding groove 19, and the fixing bolts 21 are in threaded connection with the two groups of connecting plates 18, through the sliding of the sliding block 20 in the second sliding groove 19, the semicircular sealing plate 17 can be flexibly adjusted in position, and the fixing bolts 21 further fix the connecting plates 18, so as to ensure the stability and reliability of the sealing structure.

[0031] The blocking block 22 is made of elastic material, the blocking block 22 made of elastic material can effectively fill the gap between the semicircular sealing plates 17, enhance the sealing effect, and prevent gas leakage.

[0032] The auxiliary rotating mechanism comprises a mounting groove 23, a fixing rod 24 and a roller 25, the mounting groove 23 is arranged on the inner side of the semicircular sealing plate 17, the fixing rod 24 is fixedly connected to the inner side of the mounting groove 23, and the roller 25 is rotatably connected to the outer portion of the fixing rod 24 and abuts against the drill rod 15, the abutting design of the roller 25 and the drill rod 15 reduces the friction between the drill rod 15 and the sealing structure, so that the drill rod 15 can be freely rotated, and meanwhile, the rotation of the roller 25 further improves the smoothness of the drilling.

[0033] The working principle of the drilling device for gas extraction based on the embodiment is that, when the gas extraction in the tunnel is carried out, firstly, the extraction drilling position is determined, then the positioning hole 4 is dug at the extraction drilling position, next, the surrounding cylinder 2 is fixed on the side wall of the tunnel through the first rivet 3, and the positioning hole 4 is blocked, and the gap is blocked to ensure the sealing, then the bottom plate 8 is fixed to the ground near the surrounding cylinder 2, the height of the vertical plate 13 is adjusted to correspond to the position of the positioning hole 4, the drill bit 16 and the drill rod 15 pass through the positioning hole 7 by sliding the sliding plate 12 in the first sliding groove 11 and are placed in the positioning hole 4, then the two groups of semicircular sealing plates 17 are controlled to be close to each other under the limiting sliding of the second sliding groove 19 and the sliding block 20, the gap between the positioning hole 7 and the drill rod 15 is blocked, the gap between the two groups of semicircular sealing plates 17 is sealed by the elastic sealing block 22, and the fixed bolt 21 is connected and fixed, so that the roller 25 abuts against the outer surface of the drill rod 15, and the roller 25 is relatively rolled outside the fixed rod 24, so that the sliding friction of the drill rod 15 is reduced, the drill rod 15 is freely rotated and is not interfered in the drilling process, so that the sealing of the whole internal space is ensured, the gas extraction pump is beneficial to the gas extraction work through the suction pipe 5, and the drilling work is not interfered, the whole process is relatively smooth, and the gas extraction efficiency in the tunnel is effectively improved.

[0034] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A borehole apparatus for gas extraction, characterised in that: The utility model provides a rock stratum drilling device, including the cylinder (2) positioned rock stratum (1) side wall and the bottom plate (8) positioned ground, the outside of rock stratum (1) is opened in the positioning hole (4), and the installation position of cylinder (2) corresponds between positioning hole (4), the inside fixed connection of cylinder (2) has the positioning plate (6), the outside of positioning plate (6) is opened in the positioning hole (7), the upper side slide connection of bottom plate (8) has the mounting bracket (10), the upper side fixed connection of mounting bracket (10) has the drilling mechanism, the outside slide connection of positioning plate (6) has two groups of symmetrical arrangement half circle sealing plate (17), the outside of half circle sealing plate (17) is installed with positioning mechanism, the outside fixed connection of half circle sealing plate (17) has the blocking piece (22), and the blocking piece (22) between two groups is close, the inside installation of half circle sealing plate (17) has the auxiliary rotating mechanism.

2. A borehole apparatus for gas extraction according to claim 1, characterised in that: One side of the cylinder (2) is fixedly connected with a first rivet (3), and the first rivet (3) is embedded in the side wall of the rock stratum (1), and the outside of the cylinder (2) is fixedly connected with an air suction pipe (5), and the air suction pipe (5) is connected with a gas drainage pump.

3. A borehole apparatus for gas extraction according to claim 1, wherein: The bottom of the bottom plate (8) is fixedly connected with a second rivet (9), and the second rivet (9) is embedded in the ground, and the bottom plate (8) is positioned on the ground through the second rivet (9).

4. A borehole apparatus for gas extraction according to claim 1, wherein: The upper side of the bottom plate (8) is provided with a first sliding groove (11), and the bottom of the mounting bracket (10) is fixedly connected with a sliding plate (12), and the sliding plate (12) is slidably connected to the inside of the first sliding groove (11).

5. A borehole apparatus for gas extraction according to claim 1, characterised in that: The drilling mechanism comprises a vertical plate (13), a drilling motor (14), a drill rod (15) and a drill bit (16), the vertical plate (13) is fixedly connected to the upper side of the mounting bracket (10), and the height of the vertical plate (13) corresponds to the positioning hole (4), the drilling motor (14) is fixedly connected to one side of the vertical plate (13), the drill rod (15) is fixedly connected to one side of the drilling motor (14), and the drill rod (15) penetrates the inside of the positioning hole (7), and the drill bit (16) is fixedly connected to the distal end of the drill rod (15), and the drill bit (16) is located in the inside of the positioning hole (4).

6. A borehole apparatus for gas extraction according to claim 1, wherein: The positioning mechanism comprises a connecting plate (18) and a fixed bolt (21), the outside of the positioning plate (6) is provided with a second sliding groove (19), the connecting plate (18) is fixedly connected to the outside of the half circle sealing plate (17), one side of the connecting plate (18) is fixedly connected with a sliding block (20), and the sliding block (20) is slidably connected to the inside of the second sliding groove (19), and the fixed bolt (21) is threadedly connected with the two connecting plates (18).

7. A borehole apparatus for gas extraction according to claim 1, wherein: The blocking piece (22) is made of elastic material.

8. A borehole apparatus for gas extraction according to claim 5, wherein: The auxiliary rotating mechanism comprises a mounting groove (23), a fixed rod (24) and a roller (25), the mounting groove (23) is formed in the inside of the half circle sealing plate (17), the fixed rod (24) is fixedly connected to the inside of the mounting groove (23), the roller (25) is rotatably connected to the outside of the fixed rod (24), and the roller (25) abuts against the drill rod (15).

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