Clamping device for underground explosive push rod

Abstract

The utility model relates to a clamping device for an underground explosive push rod. In order to overcome the defects in the prior art, the clamping device for the underground explosive push rod comprises clamping blocks distributed annularly and further comprises a pressing cover, a taper pipe sleeve, a spring cushion and an unlocking rotary sleeve, inclined platforms with dovetail grooves are evenly arranged on the inner wall of the taper pipe sleeve, each clamping block is in a wedge block shape, a vertical boss is arranged on the top of each clamping block, inclined protruding edges are arranged on the outer sides of the clamping blocks, and the pressing cover is arranged on the pressing cover. The taper pipe sleeve is arranged on the clamping block and embedded into the dovetail grooves of the inclined platforms in a one-to-one correspondence mode through the inclined protruding edges, the spring cushion is arranged in the extension pipe at the large end of the taper pipe sleeve, the lower surface of the spring cushion is pressed on the vertical boss of the clamping block, the gland, the spring cushion and the unlocking rotary sleeve are all annular, and the gland and the spring cushion are provided with a plurality of nylon guide columns with spiral springs. The unlocking rotary sleeve comprises an inner convex ring pipe, an outer pipe and an annular base disc, the outer pipe is rotationally arranged on the extension pipe at the small end of the taper pipe sleeve, and the lower ends of all the clamping blocks are pressed on the outer end of the inner convex ring pipe. The device is simple in structure, convenient to operate and suitable for being used in cooperation with an underground explosive pushing vehicle.

Description

Technical Field

[0001] The utility model relates to a clamping device for an underground explosive push rod. Background Art

[0002] In recent years, with the increasing depth of mining and the increasingly complex mining conditions, many coal mines have experienced rock burst, mining earthquake phenomena or safety accidents, which have posed a serious threat to mine safety production. At present, the main measures taken by high-stress mines to prevent rock burst and mining earthquakes are to carry out deep hole blasting in advance on the thick and hard roof above the coal seam to reduce the roof hanging area and the compressive strength of the roof. When carrying out deep hole blasting, it is necessary to load explosives in the holes of the roof, and the amount of explosives in each hole is tens of kilograms or even hundreds of kilograms.

[0003] The Chinese invention patent application with publication number CN118008452A published on May 10, 2024 discloses a crawler material pusher for mining, which relates to the technical field of mining pusher equipment, including a frame, crawler walking assemblies are arranged on both sides of the frame, a gas-driven hydraulic pump station is arranged on one side of the top of the frame, and a column rotator is arranged on the other side, a column is arranged on the top of the column rotator, a lifting frame is arranged on the column, a guide rail rotator is connected to one side of the lifting frame, a guide rail fixing seat is arranged on the guide rail rotator, a longitudinal oil cylinder is arranged on the guide rail fixing seat, a longitudinal slide is connected to the longitudinal oil cylinder, a guide rail is arranged on the longitudinal slide, the guide rail is driven by the guide rail propulsion oil cylinder, a push rod is arranged on the top of the guide rail, a transverse slide is arranged at the bottom of the column rotator, and the transverse slide is driven by the transverse oil cylinder. When in use, the explosive to be pushed is fixed on the top of the push rod, and then the propulsion motor drives the push rod through the push rod fixing seat to complete the explosive pushing.

[0004] The invention does not disclose the specific structure of the push rod fixing seat, and the prior art lacks a clamping device for underground explosive push rods that has a simple structure, is easy to operate, and can adjust the position of the clamping push rod. Summary of the invention

[0005] The technical problem to be solved by the utility model is how to overcome the above-mentioned defects of the prior art and provide a clamping device for an underground explosive push rod which has a simple structure, is easy to operate and can adjust the position of the clamping push rod.

[0006] In order to solve the above technical problems, the clamping device for underground explosive push rod comprises N clamping blocks distributed in an annular shape, and the underground explosive push rod can be inserted into the above clamping blocks and clamped by the above clamping blocks. The characteristics are as follows: each clamping block has a large end and a small end, and is in the shape of a wedge block. It also includes a gland, a cone sleeve, a spring pad and an unlocking rotary sleeve. The two ends of the cone sleeve are respectively connected to extension pipes. The extension pipe at the small end of the cone sleeve is provided with an external thread, and the extension pipe at the large end of the cone sleeve is provided with a flange. The gland is fixed on the cone sleeve by screws. On the flange, N inclined platforms are evenly arranged on the inner wall of the cone sleeve, each inclined platform is respectively provided with a dovetail groove, and an inclined convex ridge is arranged on the outer side of the clamp block, and the above-mentioned clamp block corresponds to the inclined platform one by one, and the inclined convex ridge of each clamp block is embedded in the dovetail groove of the corresponding inclined platform and can slide along the dovetail groove. A boss is also arranged on the top of each clamp block, and a spring pad is arranged in the extension tube of the large end of the cone sleeve, and the lower surface of the spring pad is pressed on the boss of the clamp block, and the gland, spring pad and unlocking rotary sleeve body are all annular, and there are evenly arranged M annularly distributed insertion holes, the gland is provided with through holes corresponding to the insertion holes one by one, each insertion hole is fixed with a nylon guide column, the upper end of the nylon guide column extends into the corresponding through hole of the gland, and can move in the through hole, each nylon guide column is sleeved with a spiral spring, the two ends of the spiral spring are respectively against the gland and the spring pad, the unlocking rotary sleeve includes an inner tube, an outer tube and an annular base plate, the root of the inner tube and the root of the outer tube are respectively fixedly connected to one side of the annular base plate, and the axis center lines coincide, and the inner wall of the outer tube An internal thread matching the external thread of the extension tube at the small end of the cone sleeve is opened on it, and the extension tube at the small end of the cone sleeve is screwed on the internal thread. The lower ends of all the clamping blocks are pressed on the outer end of the inner tube. When the rotary sleeve is tightened and unlocked, the inner tube pushes each clamping block to the large end of the cone sleeve. When the rotary sleeve is loosened and unlocked, each spiral spring rebounds and pushes each clamping block to the small end of the cone sleeve through the spring pad, so as to release or clamp the downhole explosive push rod. M and N are both positive integers, and 3≤M≤8, 3≤N≤8.

[0007] When the push rod needs to be released or adjusted, just tighten the unlocking sleeve, and the clamping plates on the top of the inner tube will be pushed toward the large end of the tapered sleeve. Each clamping block will be guided by the dovetail groove and move outward, thereby loosening the push rod, which is very convenient. When the push rod needs to be clamped, loosen the unlocking sleeve, and the spiral spring pushes each clamping block through the spring pad to clamp the push rod. When pushing, the pushing resistance makes the clamping force between the clamping block and the push rod tighter and tighter, and it is not easy to loosen.

[0008] Such a design is convenient for adjustment, and when the push rod is installed, the clamping force comes from the rebound force of the spiral spring, so the clamping force will not be too large. It is convenient for assembly and disassembly, the clamping force is controllable, and the clamping position is easy to adjust.

[0009] As an optimization, the insertion hole of the spring pad and the through hole of the gland are both stepped holes composed of large and small holes, the large hole is the coil spring positioning hole, and the two ends of the coil spring extend into the large holes of the corresponding stepped holes. This design ensures that the axis of the coil spring coincides with the axis of the nylon guide column, and the nylon guide column is not easily worn when the coil spring is extended or retracted.

[0010] As an optimization, a handle is further provided on the outer circumference of the unlocking rotary sleeve. With such a design, it is more labor-saving to rotate the unlocking rotary sleeve and hold the handle.

[0011] The utility model discloses a clamping device for an underground explosive push rod, which has a simple structure and is easy to operate, and can adjust the position of the clamping push rod, and is suitable for use with an underground explosive push vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The clamping device for underground explosive push rod of the utility model is further described below in conjunction with the accompanying drawings:

[0013] Figure 1 It is a three-dimensional structural schematic diagram of a cone sleeve in the clamping device for underground explosive push rod;

[0014] Figure 2 It is a three-dimensional structural schematic diagram of a wedge-shaped clamping block in the clamping device for the underground explosive push rod);

[0015] Figure 3 yes Figure 1 The AA structural diagram of the cone sleeve shown (cut along the vertical plane passing through the axis centerline);

[0016] Figure 4 It is a three-dimensional structural schematic diagram of a gland in a clamping device for an underground explosive push rod;

[0017] Figure 5 It is a structural schematic diagram of an unlocking rotary sleeve in a clamping device for an underground explosive push rod;

[0018] Figure 6 This is a schematic diagram of the assembly state of the spring pad, spring and nylon guide column in the clamping device for the underground explosive push rod;

[0019] Figure 7 It is a schematic diagram of the exploded three-dimensional structure of the clamping device for the underground explosive push rod;

[0020] Figure 8 It is a three-dimensional structural schematic diagram of the clamping device for underground explosive push rod;

[0021] Fig. 9 yes Figure 8 A schematic diagram of the BB section structure of the clamping device for the underground explosive push rod shown;

[0022] Fig.10This is a schematic diagram of the structure of the clamping device for underground explosive push rod in use;

[0023] Fig.11 yes Fig.10 The CC section structure schematic diagram of the clamping device for the underground explosive push rod is shown.

[0024] In the figure: 1 is a clamping block, 2 is a push rod for underground explosives, 3 is a gland, 4 is a cone sleeve, 5 is a spring washer, 6 is an unlocking sleeve, 61 is an inner tube, 62 is an outer tube, 63 is an annular base plate, 7 is an extension tube, 8 is a flange, 9 is a screw, 10 is an inclined platform, 11 is a dovetail groove, 12 is an inclined convex ridge, 13 is a boss, 14 is an insertion hole, 15 is a through hole, 16 is a nylon guide column, 17 is a coil spring, and 18 is a handle. DETAILED DESCRIPTION

[0025] Implementation method 1: Figure 1-11As shown, the clamping device for underground explosive push rod comprises N clamping blocks 1 distributed in an annular shape, and the underground explosive push rod 2 can be inserted into the above clamping blocks 1 and clamped by the above clamping blocks 1, which is characterized in that: each clamping block 1 has a large end and a small end, and is in the shape of a wedge, and also comprises a gland 3, a cone sleeve 4, a spring pad 5 and an unlocking rotary sleeve 6, and the two ends of the cone sleeve 4 are respectively connected with extension tubes 7, and the extension tube 7 at the small end of the cone sleeve 4 is provided with an external thread, and the extension tube 7 at the large end of the cone sleeve 4 is provided with a flange 8, the gland 3 is fixed on the flange 8 by screws 9, and the inner wall of the cone sleeve 4 is evenly provided with a plurality of screws. There are N inclined platforms 10, each inclined platform 10 is respectively provided with a dovetail groove 11, and an outer side of the clamp block 1 is provided with an inclined ridge 12. The above-mentioned clamp block 1 corresponds to the inclined platform 10 one by one, and the inclined ridge 12 of each clamp block 1 is embedded in the dovetail groove 11 of the corresponding inclined platform 10, and can slide along the dovetail groove 11. A boss 13 is also provided on the top of each clamp block 1, and a spring pad 5 is arranged in an extension tube 7 at the large end of the cone tube sleeve 4. The lower surface of the spring pad 5 is pressed on the boss 13 of the clamp block 1. The main body of the gland 3, the spring pad 5 and the unlocking rotary sleeve 6 are all annular, and M annular distributions are evenly opened on the spring pad 5. The gland is provided with a through hole 15 corresponding to the insertion hole 14, and a nylon guide column 16 is fixed in each insertion hole 14. The upper end of the nylon guide column 16 extends into the corresponding through hole 15 of the gland 3 and can move in the through hole 15. A coil spring 17 is sleeved on each nylon guide column 16, and the two ends of the coil spring 17 are respectively against the gland 3 and the spring pad 5. The unlocking rotary sleeve 6 includes an inner tube 61, an outer tube 62 and an annular base plate 63. The root of the inner tube 61 and the root of the outer tube 62 are respectively fixed to one side of the annular base plate 63, and the axis lines coincide. The inner wall of the outer tube 62 is provided with an inner thread matching the outer thread on the extension tube 7 at the small end of the cone sleeve 4, and the inner thread is screwed on the extension tube 7 at the small end of the cone sleeve 4, and the lower ends of all the clamping blocks 1 are pressed on the outer end of the inner tube 61. When the unlocking sleeve 6 is tightened, the inner tube 61 pushes each clamping block 1 to the large end of the cone sleeve 4. When the unlocking sleeve 6 is loosened, each coil spring 16 rebounds, and each clamping block 1 is pushed to the small end of the cone sleeve 4 through the spring pad 5, so as to release or clamp the underground explosive push rod 2, wherein M and N are both positive integers, and 3≤M≤8, 3≤N≤8. In this embodiment, N is 4 and M is 8.

[0026] The insertion hole 14 of the spring pad 5 and the through hole 15 of the gland 3 are both stepped holes consisting of large and small holes, the large hole being the positioning hole of the coil spring 17, and the two ends of the coil spring 17 extend into the large holes of the corresponding stepped holes respectively. A handle 18 is also provided on the outer circumference of the unlocking rotary sleeve 6.

Claims

1. A clamping device for a downhole explosive push rod, comprising N clamping blocks distributed in an annular shape, wherein a downhole explosive push rod can be inserted into the clamping blocks and clamped by the clamping blocks, characterized in that: Each clamping block has one large end and a small end in the shape of a wedge, which also includes a pressure cover, a tapered tube sleeve, a spring washer and an unlocking rotary sleeve. The two ends of the tapered tube sleeve are respectively connected to extension tubes, the extension tube at the small end of the tapered tube sleeve is provided with an external thread, the extension tube at the large end of the tapered tube sleeve is provided with a flange, the pressure cover is fixed to the flange by screws, N inclined platforms are evenly arranged on the inner wall of the tapered tube sleeve, each inclined platform is respectively provided with a dovetail groove, and an inclined convex ridge is arranged on the outer side of the clamping block. The above-mentioned clamping blocks correspond to the inclined platforms one by one, and the inclined convex ridge of each clamping block is embedded in the dovetail groove of the corresponding inclined platform and can slide along the dovetail groove. A boss is also provided on the top of each clamping block, the spring washer is arranged in the extension tube at the large end of the tapered tube sleeve, and the lower surface of the spring washer is pressed on the boss of the clamping block. The pressure cover, spring washer and unlocking rotary sleeve bodies are all annular, and M annularly distributed insertion holes are evenly arranged on the spring washer. The pressure cover is provided with through holes corresponding to the insertion holes one by one, and each insertion hole has a through hole in it. A nylon guide column is fixed respectively, and the upper ends of the nylon guide columns extend into the corresponding through holes of the gland respectively and can move in the through holes. A coil spring is sleeved on each nylon guide column, and the two ends of the coil spring respectively abut against the gland and the spring pad. The unlocking rotary sleeve comprises an inner tube, an outer tube and an annular base plate. The root of the inner tube and the root of the outer tube are respectively fixedly connected to one side of the annular base plate, and the axis lines coincide. An internal thread matching the external thread of the extension tube at the small end of the cone sleeve is opened on the inner wall of the outer tube, and the extension tube at the small end of the cone sleeve is screwed on the above-mentioned internal thread. The lower ends of all the clamping blocks are pressed on the outer end of the inner tube. When the unlocking rotary sleeve is tightened, the inner tube pushes each clamping block toward the large end of the cone sleeve. When the unlocking rotary sleeve is loosened, each coil spring rebounds and pushes each clamping block toward the small end of the cone sleeve through the spring pad, so as to release or clamp the downhole explosive push rod. M and N are both positive integers, and 3≤M≤8, 3≤N≤8.

2. The clamping device for underground explosive push rod according to claim 1, characterized in that: The insertion hole of the spring pad and the through hole of the gland are both stepped holes composed of large and small holes, the large hole is a spiral spring positioning hole, and the two ends of the spiral spring extend into the large holes of the corresponding stepped holes respectively.

3. The clamping device for underground explosive push rod according to claim 1, characterized in that: A handle is also provided on the outer circumference of the unlocking rotary sleeve.

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