A drilling reinforcement device for drilling holes in coal mines

Abstract

The present invention relates to a drilling reinforcement device for underground coal mine drilling, comprising a support mechanism, a connecting mechanism, and a handle mechanism, wherein the handle mechanism is located at one end of the connecting mechanism, and the support mechanism is located at the other end of the connecting mechanism. The support mechanism comprises a fixed sleeve, to the outside of which is connected a support net for abutting against the hole wall, and a contraction assembly is provided between the fixed sleeve and the support net. The contraction assembly is used to control the contraction of the support net toward the fixed sleeve or expansion away from the fixed sleeve, and the contraction assembly is controlled by the handle mechanism. The present invention has the effect of supporting the hole wall and reducing cracking or collapse of the hole wall.

Description

Technical Field

[0001] The present invention relates to the field of coal mining equipment, in particular to a drilling reinforcement device for drilling holes in coal mines. Background Art

[0002] Most coal mines in my country are gas mines. Gas extraction is the fundamental method to prevent and control gas. Drilling extraction is one of the main ways to extract coal seam gas in my country. The quality of the extraction borehole sealing directly affects the extraction effect.

[0003] Coal mine gas extraction is to drill into coal seams and gas concentration areas, connect the boreholes to special pipelines, and use extraction equipment to extract the gas in the coal seams and goafs to the ground for utilization;9 Gas extraction is not only an important measure to reduce the amount of gas outburst during the mining process, prevent gas exceeding the limit and accumulation, and prevent gas explosions and coal and gas outburst accidents, but it can also turn harm into benefit and be developed and utilized as a resource associated with coal.

[0004] During the drilling process, the drill rod vibrates, causing vibrations on the hole wall, which can lead to cracking or collapse of the hole wall. The collapsed waste blocks the hole, making it difficult for the extraction pipe to pass through the hole and extend to the coal seam. Summary of the Invention

[0005] In order to support the hole wall, reduce cracking or collapse of the hole wall, and facilitate the installation of a drawing pipe, the present invention provides a drilling reinforcement device for drilling holes in coal mines.

[0006] The present invention provides a drilling reinforcement device for underground coal mine drilling using the following technical solutions:

[0007] A drilling reinforcement device for drilling holes underground in coal mines, comprising a support mechanism, a connecting mechanism and a handle mechanism, wherein the handle mechanism is located at one end of the connecting mechanism and the support mechanism is located at the other end of the connecting mechanism; the support mechanism comprises a fixed sleeve, a supporting net for abutting against the hole wall is connected to the outside of the fixed sleeve, a contraction assembly is provided between the fixed sleeve and the supporting net, the contraction assembly is used to control the contraction of the supporting net toward the fixed sleeve or the expansion in the direction away from the fixed sleeve, and the contraction assembly is controlled by the handle mechanism.

[0008] By adopting the above technical solution, the support net is extended into the hole through the connecting mechanism, and the handle mechanism can control the contraction component to drive the support net to contract, which can facilitate the installation of the support net in the hole. After the support net is extended to the appropriate position of the hole, the handle mechanism controls the support net to expand so that the support net abuts against the hole wall. The support net supports the hole wall to prevent the hole wall from cracking or collapsing, and at the same time guides and limits the drill bit and the extraction tube.

[0009] Optionally, the retraction assembly includes a plurality of support rods fixedly connected to the connecting mechanism, the support rods are evenly distributed along the circumference of the outer cylinder, a telescopic rod is provided outside the support rod, the support rod is slidably connected to the telescopic rod, the end of the telescopic rod away from the support rod is fixedly connected to a hinge seat, two connecting rods are hinged on the hinge seat, and a plurality of positioning rods are evenly arranged at both ends of the support net along the circumference, the ends of the two connecting rods away from the hinge seat are respectively hinged to the ends of two adjacent positioning rods, and a driving member is provided on the fixed sleeve to drive the telescopic rod to slide along the support rod to realize the contraction and expansion of the support net.

[0010] By adopting the above technical solution, the support rod and the telescopic rod support and limit the two ends of the support net, and the driving member drives the telescopic rod to slide in the direction of the support rod. When the telescopic rod moves in the direction of the connecting mechanism, it drives the support rod and the telescopic rod to slide in the direction of the fixed sleeve, so that the support net contracts in the direction of the fixed sleeve. Conversely, the driving member drives the support rod and the telescopic rod to slide in the direction away from the fixed sleeve, so that the support net is expanded in the direction of the fixed sleeve, so that it is convenient to support it on the hole wall.

[0011] Optionally, the driving member includes a cylinder arranged on the connecting mechanism, the piston rod end of the cylinder is fixedly connected to the fixed sleeve, and the cylinder is controlled by the adjustment switch of the handle; the fixed sleeve is fixedly connected to multiple connecting rods evenly around the circumference, and the end of the connecting rod away from the positioning ring is hinged to a storage rod, and the end of the storage rod away from the connecting rod is hinged to the bottom of the hinged seat.

[0012] By adopting the above technical solution, the piston rod of the cylinder is extended, pushing the positioning ring to move downward, and the positioning ring drives the storage rod and the connecting rod to move downward, thereby driving the telescopic rod to slide along the support rod toward the outer tube, thereby driving the entire support net to shrink toward the outer tube; the piston rod of the cylinder is retracted, driving the positioning ring and the fixed sleeve to move toward the cylinder body of the cylinder, and a sliding groove is provided on the positioning ring, and the storage rod drives the telescopic rod to slide outward, thereby pushing the connecting rod and the support net to expand outward.

[0013] Optionally, a clearance groove is formed at one end of the fixing sleeve away from the cylinder, and the clearance groove corresponds to the support rod one by one. The support rod passes through the clearance groove and is fixedly connected to the connecting mechanism.

[0014] By adopting the above technical solution, when the cylinder pushes the fixed sleeve to slide, the clearance groove prevents interference between the fixed sleeve and the support rod.

[0015] Optionally, the connecting mechanism includes multiple connecting components with the same structure, the connecting components can be connected in a head-on manner, and the connecting components can be detachably connected to each other.

[0016] By adopting the above technical solution, the head and tail of the connecting components can be detachably connected, so that different numbers of connecting components can be assembled according to the depth of the drilling hole to adapt to holes of different depths.

[0017] Optionally, the connecting assembly includes an inner cylinder and an outer cylinder, the inner cylinder and the outer cylinder are slidingly connected, and a bolt is threadedly connected to the outer cylinder to fix the outer cylinder and the inner cylinder.

[0018] By adopting the above technical solution, the inner tube and the outer tube are connected by sliding, so that the length of the connecting assembly can be changed, and the length of the connecting assembly can be adjusted in a small range.

[0019] Optionally, a sliding groove is provided on the outer wall of the inner cylinder along its axial direction, a slider is fixedly connected to the inner wall of the outer cylinder, the slider is slidably connected in the sliding groove, a bolt is threadedly connected on the outer cylinder, and the bolt is threadedly connected to the side wall of the outer cylinder and the slider.

[0020] By adopting the above technical solution, when adjusting the length of the connecting assembly, the outer cylinder is slid along the axial direction of the inner cylinder. After sliding to the appropriate position, the bolts are tightened to fix the outer cylinder and the inner cylinder, thereby enabling the length of each connecting assembly to be adjusted individually.

[0021] Optionally, a plurality of protrusions are evenly fixed along the circumference of one end of the inner tube, and a positioning tube is fixedly connected to the end of the outer tube away from the inner tube protrusions. A plug-in groove for the protrusions to be inserted is formed between the positioning tube and the inner wall of the outer tube, and a bolt is threadedly connected on the side wall of the outer tube to fix the protrusions and the positioning tube.

[0022] By adopting the above technical solution, the protrusion of the inner tube of the connecting component is inserted into the insertion groove of the adjacent connecting component. After the bolt passes through the outer tube, the protrusion is pressed against the positioning tube, so that the outer tube and inner tube of the two adjacent connecting components can be fixed, and then the two adjacent connecting components can be assembled together to change the length of the connecting mechanism.

[0023] Optionally, multiple buffer springs are evenly arranged along the circumference of the plug-in slot, and the buffer springs are inserted into the gap between adjacent protrusions. One end of the buffer spring is fixedly connected to the bottom of the plug-in slot, and the other end is fixedly connected to the guide block, and guide slopes are provided at both ends of the guide block.

[0024] By adopting the above technical solution, the guiding bevel facilitates the insertion of the protrusion between adjacent buffer springs, and the buffer spring is supported at the connection between the inner cylinder and the outer cylinder. When drilling or extracting materials outward, the vibration between the inner cylinder and the outer cylinder can be reduced, thereby making the connection between the inner cylinder and the outer cylinder more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0026] Figure 2 It is a cross-sectional view of the connecting mechanism.

[0027] Figure 3This is an exploded view of the connection mechanism.

[0028] Figure 4 yes Figure 2 Magnified view of part A.

[0029] Figure 5 It is a schematic diagram of the overall structure of the support mechanism and connecting components.

[0030] Figure 6 yes Figure 5 Enlarged view of part B.

[0031] Figure 7 yes Figure 5 Enlarged view of part C.

[0032] Explanation of the accompanying drawings: 1. Support mechanism; 11. Fixed sleeve; 111. Positioning ring; 112. Give way groove; 12. Retraction assembly; 121. Support rod; 122. Telescopic rod; 123. Articulated seat; 124. Connecting rod; 125. Connecting rod; 126. Storage rod; 13. Support net; 14. Positioning rod; 15. Cylinder; 2. Connecting mechanism; 21. Connecting assembly; 211. Inner cylinder; 2111. Slide groove; 212. Outer cylinder; 2121. Slider; 213. Bump; 214. Positioning cylinder; 215. Insertion groove; 216. Buffer spring; 217. Guide block; 218. Guide slope; 3. Handle mechanism; 31. Handle body; 32. Adjustment switch. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-7 The present invention is described in further detail.

[0034] The embodiment of the present invention discloses a drilling reinforcement device for drilling holes in coal mines. Figure 1 A drilling reinforcement device for drilling holes underground in coal mines includes a support mechanism 1, a connecting mechanism 2 and a handle mechanism 3. The handle mechanism 3 is located at one end of the connecting mechanism 2, and the support mechanism 1 is located at the other end of the connecting mechanism 2; the handle mechanism 3 includes a handle body 31, and the handle body 31 is provided with an adjustment switch 32, which is used to control the open or closed state of the support mechanism 1.

[0035] Reference Figure 2 The connecting mechanism 2 includes multiple connecting components 21 with the same structure. The connecting components 21 can be connected in the first place, so that different numbers of connecting components 21 can be assembled according to the depth of the drilling. The structures of the connecting components 21 are the same. Only one connecting component 21 is taken as an example here.

[0036] Reference Figure 3 and Figure 4The connecting component 21 includes an inner cylinder 211 and an outer cylinder 212 sleeved outside the inner cylinder 211. The diameter of the inner cylinder 211 is greater than 50 mm to ensure that a PVC pipe with a diameter of 50 mm passes through. A slide groove 2111 is opened along the axial direction of the outer wall of the inner cylinder 211. A slider 2121 is fixedly connected to the inner wall of the outer cylinder 212. The slider 2121 is slidably connected in the slide groove 2111. A bolt is threaded on the outer cylinder 212. The bolt passes through the side wall of the outer cylinder 212 and the slider 2121. The outer cylinder 212 and the slider 2121 are both threadedly connected. When adjusting the length of the connecting component 21, the outer cylinder 212 is slid along the axial direction of the inner cylinder 211. After sliding to the appropriate position, the bolt is tightened to fix the outer cylinder 212 and the inner cylinder 211, so that the length of each connecting component 21 can be adjusted individually.

[0037] One end of the inner cylinder 211 is evenly fixed with multiple protrusions 213 along its circumference, and the end of the outer cylinder 212 away from the protrusions 213 of the inner cylinder 211 is fixedly connected to a positioning cylinder 214, and the positioning cylinder 214 is fixedly connected to the inner side wall of the outer cylinder 212. A plug-in groove 215 for the protrusions 213 to be plugged in is formed between the positioning cylinder 214 and the inner wall of the outer cylinder 212. The plug-in groove 215 is arranged in an annular shape, and a bolt is threadedly connected to the side wall of the outer cylinder 212. After the bolt passes through the outer cylinder 212, the protrusion 213 is pressed against the positioning cylinder 214, so that the outer cylinder 212 and the inner cylinder 211 of the two adjacent connecting components 21 can be fixed, and then the two adjacent connecting components 21 can be assembled together. A plurality of buffer springs 216 are evenly arranged along the circumference of the plug-in slot 215. The buffer springs 216 correspond to the protrusions 213 one by one. The buffer springs 216 are inserted into the gap between adjacent protrusions 213. The end of the buffer spring 216 is fixedly connected to the bottom of the plug-in slot 215, and the other end is fixedly connected to the guide block 217. The two ends of the guide block 217 are provided with guide slopes 218 to facilitate the protrusion 213 to be inserted between adjacent buffer springs 216.

[0038] Reference Figure 5 The support mechanism 1 includes a fixed sleeve 11, a contraction component 12, and a support net 13. The contraction component 12 is connected between the fixed sleeve 11 and the support net 13. The fixed sleeve 11 is sleeved on the outside of the outer cylinder 212 and can slide along the axial direction of the outer cylinder 212. The support net 13 is cylindrical, and a plurality of positioning rods 14 are evenly arranged at both ends of the support net 13 along its circumference. The support net 13 is composed of a plurality of braided rods, and the ends of the braided rods are fixedly connected to the positioning rods 14. The braided rods of the support net 13 are staggered to form a diamond-shaped mesh. The maximum mesh size that can pass through the block volume is no more than 2*2*2mm. The figure shows that four braided rods are fixedly connected to each positioning rod 14, but it is not limited to two.

[0039] Reference Figure 6 and Figure 7The contraction assembly 12 includes a plurality of support rods 121 fixedly connected to the outer cylinder 212 near the positioning ring 111. The support rods 121 are evenly distributed along the circumference of the outer cylinder 212. A telescopic rod 122 is provided on the outer sleeve of the support rod 121. The support rod 121 is slidably connected to the telescopic rod 122. An end of the telescopic rod 122 away from the support rod 121 is fixedly connected to a hinge seat 123. Two connecting rods 124 are hinged on the hinge seat 123. Each connecting rod 124 is hinged to the end of two adjacent positioning rods 14. The support rods 121 and the telescopic rods 122 are used to support and limit the two ends of the support net 13.

[0040] The end of the fixed sleeve 11 is fixedly connected to a positioning ring 111, and the positioning ring 111 is evenly fixedly connected to multiple connecting rods 125. The connecting rods 125 and the support rods 121 are arranged in a one-to-one correspondence. The connecting rods 125 are arranged perpendicular to the axial direction of the fixed sleeve 11. The end of the connecting rod 125 away from the positioning ring 111 is hinged to a storage rod 126, and the end of the storage rod 126 away from the connecting rod 125 is hinged to the bottom of the hinge seat 123; the side wall of the outer tube 212 is fixedly connected to the cylinder 15, the cylinder body of the cylinder 15 is fixedly connected to the outer tube 212, the piston rod end of the cylinder 15 is fixedly connected to the positioning ring 111, and the cylinder 15 is controlled by the adjustment switch 32 of the handle. The piston rod of the cylinder 15 is extended, pushing the positioning ring 111 to move downward, and the positioning ring 111 drives the receiving rod 126 and the connecting rod 124 to move downward, thereby driving the telescopic rod 122 to slide along the support rod 121 toward the outer tube 212, thereby driving the entire support net 13 to shrink toward the outer tube 212; the piston rod of the cylinder 15 is retracted, driving the positioning ring 111 and the fixed sleeve 11 to move toward the cylinder body of the cylinder 15, and a sliding groove 2111 is provided on the positioning ring 111, and the receiving rod 126 drives the telescopic rod 122 to slide outward, thereby pushing the connecting rod 124 and the support net 13 to expand outward.

[0041] A plurality of clearance grooves 112 are provided at one end of the fixed sleeve 11 away from the cylinder 15. The clearance grooves 112 correspond one-to-one to the support rods 121. The support rods 121 pass through the clearance grooves 112 and are fixedly connected to the outer cylinder 212. When the cylinder 15 pushes the fixed sleeve 11 to slide, the clearance grooves 112 prevent interference between the fixed sleeve 11 and the support rods 121. The support net 13 is sprayed with anti-corrosion paint to prevent the humidity and gas in the use environment from causing rust to the support net 13.

[0042] The implementation principle of a drilling reinforcement device for underground drilling in coal mines according to an embodiment of the present invention is as follows: according to the depth of the drilled hole, the length of the connecting assembly 21 is assembled to ensure that the support net 13 can extend to the bottom of the hole wall; during the installation of the support net 13, the piston rod of the cylinder 15 is in an extended state, driving the telescopic rod 122 to slide along the support rod 121 toward the direction of the outer cylinder 212, thereby driving the entire support net 13 to shrink toward the direction of the outer cylinder 212, so that the support net 13 is installed in the hole. After the support net 13 is extended to the appropriate position, the piston rod of the control cylinder 15 is retracted, driving the positioning ring 111 and the fixed sleeve 11 to move toward the cylinder body of the cylinder 15, and the storage rod 126 pushes the telescopic rod 122 to slide outward, thereby pushing the connecting rod 124 and the support net 13 to open outward, so that the support net 13 abuts against the hole wall to prevent the hole wall from cracking or collapsing.

[0043] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A drilling reinforcement device for underground coal mine drilling, characterized by: The invention comprises a support mechanism (1), a connecting mechanism (2) and a handle mechanism (3), wherein the handle mechanism (3) is located at one end of the connecting mechanism (2) and the support mechanism (1) is located at the other end of the connecting mechanism (2); the support mechanism (1) comprises a fixed sleeve, a support net (13) for contacting a hole wall is connected to the outside of the fixed sleeve, a contraction component (12) is provided between the fixed sleeve and the support net (13), the contraction component (12) is used to control the support net (13) to contract in the direction of the fixed sleeve or to expand in the direction away from the fixed sleeve, and the contraction component (12) is controlled by the handle mechanism (3); The connecting mechanism (2) comprises a plurality of connecting assemblies (21) of identical structure, wherein the connecting assemblies (21) comprise an inner cylinder (211) and an outer cylinder (212); the contraction assembly (12) comprises a plurality of support rods (121) fixedly connected to the connecting mechanism (2), wherein the support rods (121) are evenly distributed along the circumference of the outer cylinder (212), and a telescopic rod (122) is provided on the outer cover of the support rods (121), wherein the support rods (121) are slidably connected to the inside of the telescopic rod (122), and the telescopic rod (122) One end away from the support rod (121) is fixedly connected to a hinge seat (123), two connecting rods (124) are hinged on the hinge seat (123), and a plurality of positioning rods (14) are evenly arranged at both ends of the support net (13) along its circumference. One end of the two connecting rods (124) away from the hinge seat (123) is respectively hinged to the ends of two adjacent positioning rods (14), and a driving member for driving the telescopic rod (122) to slide along the support rod (121) to realize the contraction and expansion of the support net (13) is provided on the fixed sleeve; The driving member comprises a cylinder (15) arranged on the connecting mechanism (2), the piston rod end of the cylinder (15) is fixedly connected to the fixed sleeve, and the cylinder (15) is controlled by the regulating switch (32) of the handle; the end of the fixed sleeve (11) is fixedly connected to a positioning ring (111), and the fixed sleeve is fixedly connected to a plurality of connecting rods (125) uniformly in the circumferential direction, and one end of the connecting rod (125) away from the positioning ring (111) is hinged to a receiving rod (126), and one end of the receiving rod (126) away from the connecting rod (125) is hinged to the bottom of the hinge seat (123); A clearance groove (112) is provided at one end of the fixed sleeve away from the cylinder (15), and the clearance groove (112) corresponds to the support rod (121) one by one. The support rod (121) passes through the clearance groove (112) and is fixedly connected to the connecting mechanism (2).

2. The drilling reinforcement device for underground coal mine drilling according to claim 1, characterized in that: The connecting components (21) can be connected end to end, and the connecting components (21) can be detachably connected to each other.

3. The drilling reinforcement device for underground coal mine drilling according to claim 2, characterized in that: The inner cylinder (211) and the outer cylinder (212) are connected in a sliding manner, and a bolt for fixing the outer cylinder (212) and the inner cylinder (211) is threadedly connected on the outer cylinder (212).

4. The drilling reinforcement device for underground coal mine drilling according to claim 3, characterized in that: The outer wall of the inner cylinder (211) is provided with a sliding groove (2111) along its axial direction, the inner wall of the outer cylinder (212) is fixedly connected with a slider (2121), the slider (2121) is slidably connected in the sliding groove (2111), and the outer cylinder (212) is threadedly connected with a bolt, and the bolt is threadedly connected to the side wall of the outer cylinder (212) and the slider (2121).

5. The drilling reinforcement device for underground coal mine drilling according to claim 2, characterized in that: One end of the inner cylinder (211) is evenly fixed with a plurality of protrusions (213) along its circumference; one end of the outer cylinder (212) away from the protrusions (213) of the inner cylinder (211) is fixedly connected with a positioning cylinder (214); a plug-in groove (215) for plugging the protrusions (213) is formed between the positioning cylinder (214) and the inner wall of the outer cylinder (212); and a bolt for fixing the protrusions (213) and the positioning cylinder (214) is threadedly connected on the side wall of the outer cylinder (212).

6. The drilling reinforcement device for underground coal mine drilling according to claim 5, characterized in that: A plurality of buffer springs (216) are evenly arranged along the circumference of the plug-in slot (215). The buffer springs (216) are inserted into the gaps between adjacent protrusions (213). One end of the buffer spring (216) is fixedly connected to the bottom of the plug-in slot (215), and the other end is fixedly connected to a guide block (217). Both ends of the guide block (217) are provided with guide inclined surfaces (218).

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