Improved air spacer capable of transmitting explosion

Abstract

The improved air spacer comprises a tray, a flexible bag and a plurality of supporting pieces, the periphery of the tray is used for abutting against the inner wall of a blast hole, and a material passing channel is formed in the tray in the vertical direction; an opening communicated with the material passing channel is formed in one side of the flexible bag; the plurality of supporting sheets are sequentially arranged in the circumferential direction of the flexible bag, are fixedly connected with the flexible bag and are used for shaping the flexible bag and supporting the tray and the materials above the flexible bag; the bottom of a blast hole is filled with part of blasting explosives, then the air spacer is placed in the blast hole, the explosives are added into the tray, the explosives flow into the flexible bag, in the process of filling the explosives into the flexible bag, due to the fact that the flexible bag is fixedly connected with the supporting pieces in the circumferential direction of the flexible bag, the supporting pieces can shape the flexible bag, and therefore the flexible bag can be shaped. The condition that the flexible bag folds and deviates in the explosive charging process is effectively avoided, explosive charging is convenient, and meanwhile the supporting performance of the flexible bag on a tray and explosives above the flexible bag can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mine blasting operation technical field especially relates to an improved air spacer of transmission blasting. BACKGROUND

[0002] Air interval charging reduces explosive unit consumption, reduces root, reduces blast hole explosion pressure, reduces even avoids the impact crushing of ore rock formed due to coupling charging, and air spacer can expand the range of fracture zone and improve the effective utilization rate of explosive blasting energy.

[0003] For example, the utility model patent (CN202322102203.9) proposes an air spacer, which comprises a tray and a flexible bag, the outer periphery of which is used to abut against the inner wall of a blast hole and is provided with a material passing channel in the vertical direction; the flexible bag has a material cavity with one side being open, and the end provided with the opening is connected to the lower end of the tray, so that the material cavity is communicated with the material passing channel, and the outer diameter of the flexible bag is smaller than the outer diameter of the tray, so that the flexible bag is spaced apart from the inner wall of the blast hole in the radial direction after being filled with material.

[0004] However, the flexible bag is prone to wrinkle and deviation during charging, and charging is inconvenient. UTILITY MODEL CONTENTS

[0005] Therefore, it is necessary to provide an improved air spacer of transmission blasting to solve the problem of the flexible bag being prone to wrinkle and deviation during charging.

[0006] The utility model provides an improved air spacer of transmission blasting, which comprises a tray, a flexible bag and a plurality of supporting pieces, the outer periphery of the tray is used to abut against the inner wall of a blast hole and is provided with a material passing channel in the vertical direction; one side of the flexible bag is provided with an opening communicated with the material passing channel; the plurality of supporting pieces are arranged in sequence along the circumference of the flexible bag and are fixedly connected with the flexible bag to shape the flexible bag and support the tray and the material above the flexible bag.

[0007] Further, the supporting pieces are vertical long strip-shaped structures, the height of the supporting pieces is smaller than the height of the flexible bag, and the width of the supporting pieces is smaller than the width of the flexible bag.

[0008] Further, the plurality of supporting pieces are uniformly arranged along the circumference of the flexible bag, the flexible bag has a first state and a second state, when the flexible bag is in the first state, the plurality of supporting pieces directly or indirectly abut against each other to fold the flexible bag, and when the flexible bag is in the second state, the plurality of supporting pieces are spaced apart from each other to expand the flexible bag.

[0009] Further, the supporting pieces are arranged on the outer surface of the flexible bag.

[0010] Further, the support sheet is bonded to the flexible bag via glue.

[0011] Further, the top of the support sheet abuts against the tray, and the bottom of the support sheet abuts against the material below.

[0012] Further, the tray comprises a bearing part and a connecting part, the outer periphery of the bearing part is used to abut against the inner wall of the blast hole, and the connecting part is connected to the lower end of the bearing part, wherein the material passing channel extends from the upper end face of the bearing part to the lower end face of the connecting part.

[0013] Further, the bearing part is in the shape of a gradually expanding bell mouth in the direction away from the connecting part.

[0014] Further, a gasket is further included, the top of the flexible bag is provided with an opening, the gasket is arranged on the inner bottom wall of the flexible bag, and the shape and size of the gasket are matched with the shape and size of the inner bottom part of the flexible bag.

[0015] Further, a cable tie is further included, the opening of the flexible bag is sleeved on the outer wall of the tray, and the cable tie is fixed to the tray.

[0016] Compared with the prior art, the tray and the flexible bag are selected according to the type of the explosive used in blasting, the flexible bag is completely unfolded in a wide place, part of the blasting explosive is filled into the bottom of the blast hole, the air spacer is placed in the blast hole, the explosive is added into the tray, and the explosive flows into the flexible bag. In the process of charging the flexible bag, the flexible bag is shaped by the plurality of support sheets fixedly connected along the circumference of the flexible bag, the flexible bag is effectively prevented from being wrinkled and deviated during charging, the charging is convenient, and meanwhile the support performance of the flexible bag to the tray and the explosive above the flexible bag is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 A structure schematic view of the improved blasting air spacer is provided for the embodiments of the present application;

[0018] Fig. 2 A layout schematic view of the plurality of support sheets in the improved blasting air spacer is provided for the embodiments of the present application. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present application are specifically described below with reference to the drawings, wherein the drawings form a part of the present application, and are used to explain the principles of the present application together with the embodiments of the present application, and are not used to limit the scope of the present application.

[0020] As Figs. 1-2As shown, the improved air spacer provided by the utility model can drain the explosive N into the flexible bag 200 and seal the air space between the flexible bag 200 and the blast hole M. Specifically, the outer periphery of the tray 100 is used to abut the inner wall of the blast hole M and is provided with a material passing channel in the vertical direction, one side of the flexible bag 200 is provided with an opening in communication with the material passing channel, and the plurality of supporting sheets 300 are arranged in the circumferential direction of the flexible bag 200 in sequence and are fixedly connected with the flexible bag 200 to shape the flexible bag 200 and support the tray 100 and the material above the flexible bag 200.

[0021] In use of the air spacer provided by the utility model, the appropriate tray 100 and flexible bag 200 are selected according to the type of explosive N used for blasting, the flexible bag 200 is completely unfolded in a spacious place, part of the blasting explosive N is filled into the bottom of the blast hole M, the air spacer is placed in the blast hole M, the explosive N is added into the tray 100, the explosive N flows into the flexible bag 200, and in the process of charging the flexible bag 200, since the flexible bag 200 is fixedly connected with the plurality of supporting sheets 300 in the circumferential direction, the supporting sheets 300 can shape the flexible bag 200, effectively avoid the wrinkling and deviation of the flexible bag 200 in the charging process, conveniently charge, and meanwhile, the supporting performance of the flexible bag 200 to the tray 100 and the explosive N above the flexible bag 200 can be improved.

[0022] The tray 100 in the embodiment not only can drain the explosive N into the flexible bag 200, but also can seal the air space formed between the flexible bag 200 and the blast hole M. Specifically, the outer periphery of the tray 100 is used to abut the inner wall of the blast hole M and is provided with a material passing channel in the vertical direction.

[0023] In one embodiment, the tray 100 comprises a bearing part and a connecting part, the outer periphery of the bearing part is used to abut the inner wall of the blast hole M, and the connecting part is connected to the lower end of the bearing part, wherein the material passing channel extends from the upper end face of the bearing part to the lower end face of the connecting part.

[0024] The bearing part is in the shape of a gradually expanding horn mouth in the direction away from the connecting part, the tray 100 has a material passing channel communicating with the upper and lower surfaces thereof, and the horn mouth shape of the tray 100 has a sealing function. Specifically, the tray 100 in the horn mouth shape adopts a fan-shaped structure design with alternating thicknesses, which can not only shrink inwardly, but also stretch outwardly and expand, thereby playing a sealing role on the blast hole M. A plurality of holes are arranged in a circle on the inner bottom of the tray 100, an annular sheet can be arranged on the plurality of holes, the annular sheet is semi-fixed at the inner bottom position of the tray 100, has a one-way flow property, and is flipped due to the action of air flow or water flow when being put, so that the blast hole M and the outside are normally communicated, and the upper explosive N can be spaced after the putting is completed.

[0025] The flexible bag 200 in the embodiment is a structure for containing explosive N, which can form an air gap with the inner wall of the blast hole M. One side of the flexible bag 200 is provided with an opening communicating with the material passing channel, so as to facilitate the introduction of explosive N into the flexible bag 200 through the tray 100.

[0026] In one embodiment, the flexible bag 200 is further provided with a gasket 210. The gasket 210 is arranged on the inner bottom wall of the flexible bag 200. The shape and size of the gasket 210 are matched with the shape and size of the inner bottom of the flexible bag 200. The gasket 210 is arranged to facilitate the opening and shaping of the bottom of the flexible bag 200.

[0027] It can be understood that when the cross section of the inner bottom wall of the flexible bag 200 is circular, the gasket 210 is correspondingly circular.

[0028] In one embodiment, the flexible bag 200 is further provided with a strap 220. The opening of the flexible bag 200 is sleeved on the outer wall of the tray 100, and is fixed on the tray 100 through the strap 220. This facilitates the connection between the flexible bag 200 and the tray 100.

[0029] In order to avoid the flexible bag 200 from being wrinkled and deviated during the charging process, the embodiment further comprises a plurality of support pieces 300. The plurality of support pieces 300 are arranged along the circumference of the flexible bag 200 in sequence and are fixedly connected with the flexible bag 200, so as to shape the flexible bag 200 and support the tray 100 and the material above the flexible bag 200.

[0030] The support piece 300 is a vertical long strip-shaped structure. The height of the support piece 300 is less than the height of the flexible bag 200, and the width of the support piece 300 is less than the width of the flexible bag 200. The flexible bag 200, the support piece 300, the strap 220 and the gasket 210 are combined into a charging pipe.

[0031] In one embodiment, the plurality of support pieces 300 are uniformly arranged along the circumference of the flexible bag 200. The flexible bag 200 has a first state and a second state. When the flexible bag 200 is in the first state, the plurality of support pieces 300 directly or indirectly abut each other, so as to fold the flexible bag 200. When the flexible bag 200 is in the second state, the plurality of support pieces 300 are arranged in pairs with a spacing therebetween, so as to open the flexible bag 200.

[0032] Specifically, when the flexible bag 200 is in the first state, the charging pipe is flat and has a small volume, which is convenient for transportation and storage. When the flexible bag 200 is in the second state, the upper explosive N on the support piece 300 on the surface of the charging pipe has a supporting effect.

[0033] In one embodiment, the support piece 300 is arranged on the outer surface of the flexible bag 200. Of course, in other embodiments, the support piece 300 can also be arranged on the inner wall or interlayer of the flexible bag 200.

[0034] In one embodiment, the support sheet 300 is bonded with the flexible bag 200 via glue. Of course, in other embodiments, the support sheet 300 can also be connected with the flexible bag 200 in other ways.

[0035] In one embodiment, the top of the support sheet 300 abuts against the tray 100, and the bottom of the support sheet 300 abuts against the underlying material, so as to support the tray 100 and the explosive N thereon.

[0036] In order to facilitate the ignition of the explosive N in the blast hole M, the present embodiment further comprises an initiation assembly 400, which comprises an electronic detonator 410 and a detonator lead 420, the electronic detonator 410 is embedded in the explosive N below the flexible bag 200, one end of the detonator lead 420 is connected with the electronic detonator 410, and the other end of the detonator lead 420 is drawn out of the blast hole M.

[0037] Compared with the prior art, according to the type of explosive N used in blasting, the appropriate tray 100 and flexible bag 200 are selected, the flexible bag 200 is completely unfolded in a spacious place, part of the blasting explosive N is first filled to the bottom of the blast hole M, then the air spacer is placed in the blast hole M, the explosive N is added to the tray 100, and the explosive N flows into the flexible bag 200, during the charging of the flexible bag 200, since the flexible bag 200 is fixedly connected with a plurality of support sheets 300 along the circumference thereof, the support sheet 300 can shape the flexible bag 200, effectively avoiding the situation that the flexible bag 200 is wrinkled and deviated during charging, the charging is convenient, and meanwhile the support performance of the flexible bag 200 to the tray 100 and the explosive N thereon can be improved.

[0038] The above describes only the preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An improved air spacer for a booster charge, characterized in that, The tray, the flexible bag and the plurality of supporting pieces are arranged in the order of the tray, the flexible bag and the plurality of supporting pieces. The tray has a periphery abutting against the inner wall of the blast hole and a material passing channel arranged in the vertical direction. The flexible bag has an opening arranged on one side thereof and communicating with the material passing channel. The plurality of supporting pieces are arranged in the circumferential direction of the flexible bag and are fixedly connected to the flexible bag, so as to shape the flexible bag and support the tray and the material above the flexible bag.

2. The modified primable air spacer of claim 1, wherein, The supporting piece is in the shape of a vertical long strip, the height of the supporting piece is less than the height of the flexible bag, and the width of the supporting piece is less than the width of the flexible bag.

3. The modified primable air spacer of claim 1, wherein, The plurality of supporting pieces are arranged uniformly in the circumferential direction of the flexible bag, the flexible bag has a first state and a second state, when the flexible bag is in the first state, the plurality of supporting pieces directly or indirectly abut against each other, so as to fold the flexible bag, and when the flexible bag is in the second state, the plurality of supporting pieces are arranged in pairs with a spacing therebetween, so as to open the flexible bag.

4. The modified primable air spacer of claim 1, wherein, The supporting piece is arranged on the outer surface of the flexible bag.

5. The modified primable air spacer of claim 1, wherein, The supporting piece is bonded to the flexible bag via glue.

6. The modified primable air spacer of claim 1, wherein, The top of the supporting piece abuts against the tray, and the bottom of the supporting piece abuts against the material below.

7. The modified primable air spacer of claim 1, wherein The tray comprises a bearing part and a connecting part, the periphery of the bearing part abuts against the inner wall of the blast hole, the connecting part is connected to the lower end of the bearing part, and the material passing channel extends from the upper end surface of the bearing part to the lower end surface of the connecting part.

8. The modified primable air spacer of claim 7, wherein, The bearing part is in the shape of a gradually expanding bell mouth in the direction away from the connecting part.

9. The modified primable air spacer of claim 1, wherein, The flexible bag has an opening arranged on the top thereof, the gasket is arranged on the inner bottom wall of the flexible bag, and the shape and size of the gasket are matched with the shape and size of the inner bottom of the flexible bag.

10. The modified primable air spacer of claim 1, wherein, The flexible bag has an opening arranged on the top thereof, the gasket is arranged on the inner bottom wall of the flexible bag, and the shape and size of the gasket are matched with the shape and size of the inner bottom of the flexible bag.

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