Explosion propagation spacer

Abstract

The utility model discloses an explosion propagation spacer which comprises a tray and a flexible bag, the tray is provided with a feeding channel, and the circumference of the tray is used for abutting against the side wall of a blast hole; the upper end of the flexible bag communicates with the feeding channel, the diameter of the flexible bag is the same as that of the feeding channel, the feeding channel is used for conveying explosives into the flexible bag, and the tray, the flexible bag and the explosives at the bottom of the blast hole jointly define a cavity; and a non-return device is further arranged in the feeding channel, and the non-return device is used for limiting the explosive in the flexible bag from overflowing from the feeding channel. According to the explosive charging device, explosives in the flexible bag can be effectively prevented from overflowing from the feeding channel, and the supporting strength of the flexible bag after explosive charging is completed is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of mining blasting technology, specifically to a detonator-transmitting spacer. Background Technology

[0002] Industrial explosives can be divided into packaged explosives and field-mixed explosives. Compared with packaged explosives, field-mixed explosives have advantages such as high safety, low cost, accurate metering, and high degree of automation. When using field-mixed explosives, air gap charging is usually adopted. Air gap charging reduces the unit consumption of explosives, reduces the base, reduces the explosion pressure in the borehole, reduces or even avoids the rock and ore impact crushing caused by coupled charging, expands the fracture zone, and improves the effective utilization rate of explosive blasting energy, thereby reducing the unit consumption of explosives.

[0003] Patent CN117968471A discloses a novel detonator, which includes a tray, a charge, and a fixing member. The tray has a feeding channel inside. One end of the charge has an opening that communicates with the feeding channel. The other end of the charge is folded to form a folded part. The fixing member is fixed to the folded part to close the folded part of the charge. The distance from the opening of the feeding channel to the fixing member is the air gap length.

[0004] The explosive charge in the prior art is made of a flexible material. When the detonator is placed in the borehole, the explosive charge is squeezed and the explosive inside is prone to overflow from the feed channel, resulting in poor support. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a detonation-transmitting spacer to solve the technical problem that in the prior art, the explosive charge is made of flexible material, and when the detonation-transmitting spacer is placed in the borehole, the explosive charge inside is easily squeezed out of the feed channel, resulting in poor support effect.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a detonation-transmitting spacer for use inside a borehole, wherein the bottom of the borehole is filled with explosives, comprising:

[0008] A tray, provided with a feed channel, the circumference of which is used to abut against the sidewall of the borehole; and

[0009] A flexible bag, the upper end of which is connected to the feeding channel, the diameter of which is the same as the diameter of the feeding channel, the feeding channel being used to feed explosives into the flexible bag, the tray, the flexible bag, and the explosives at the bottom of the borehole together forming a cavity;

[0010] The feeding channel is also equipped with a backstop device, which is used to prevent the explosives in the flexible bag from overflowing from the feeding channel.

[0011] In some embodiments, the backstop device includes a first mounting member, the first mounting member having a first mounting channel extending vertically, the first mounting channel being connected to the feed channel, and the inner sidewall of the first mounting channel having a plurality of elastic first backstop plates, the plurality of first backstop plates being arranged circumferentially along the first mounting member, and each first backstop plate extending toward the center of the feed channel, and the first backstop plates gradually tilting downwards in the direction toward the center of the feed channel, the plurality of first backstop plates collectively blocking the feed channel; or

[0012] The backstop device includes a second mounting member and a second backstop plate. The second mounting member has a second mounting channel extending in a vertical direction. The second mounting channel is connected to the feed channel. A backstop portion is provided in the second mounting channel. The second backstop plate is elastically rotatably mounted in the mounting channel along a horizontal axis and located below the backstop portion, so that when the second backstop plate rotates upward to abut against the backstop portion, the second backstop plate blocks the feed channel.

[0013] In some embodiments, the first mounting member or the second mounting member is detachably connected to the tray.

[0014] In some embodiments, the backstop device includes a connecting bag and a tightening member. The connecting bag is arranged vertically and is located inside the tray. The lower end of the connecting bag is connected to the feed channel. The tightening member is located at the upper end of the connecting bag so that after the flexible bag explosive is filled, the tightening member is used to tighten the upper end of the connecting bag.

[0015] In some embodiments, the tray or the anti-reverse device is further provided with a pressure relief hole communicating with the flexible bag.

[0016] In some embodiments, the tray includes a tray bottom and a tray side extending upward from the tray bottom. The tray side is gradually widened from bottom to top and includes a plurality of elastic sidewalls. The plurality of elastic sidewalls are arranged circumferentially at intervals along the tray bottom. The bottom of each elastic sidewall is connected to the tray bottom. The elastic sidewalls are elastically extendable and retractable in directions close to and away from the center of the feed channel.

[0017] Among them, a flexible connection part is provided between two adjacent elastic sidewalls, the bottom of the flexible connection part is connected to the bottom of the tray, and the flexible connection part is bent inward.

[0018] In some embodiments, the tray further comprises a water-permeable hole communicating with the cavity; and / or

[0019] The two adjacent elastic sidewalls include a first elastic piece and a second elastic piece, the area of ​​the first elastic piece is larger than the area of ​​the second elastic piece, and there is a gap between the first elastic piece and the adjacent flexible connection portion.

[0020] In some embodiments, the bottom of the flexible bag is an isosceles triangle.

[0021] In some embodiments, the detonating spacer further includes a support member disposed at the bottom of the flexible bag. The length of the support member is greater than the diameter of the borehole. The support member is inclined to abut against the explosive at the bottom of the borehole to support the flexible bag.

[0022] In some embodiments, the support member includes a first support plate, the length of which is greater than the diameter of the borehole, and a detonation hole is provided in the middle of the first support plate; or

[0023] The support includes two second support plates, the sum of the lengths of the two second support plates is greater than the diameter of the blast hole, the distance between the two second support plates gradually increases from top to bottom, and a blast hole is provided at the end of the second support plate near the other second support plate.

[0024] In some embodiments, the flexible bag includes a main body segment and a support segment connected sequentially from top to bottom. The connection between the main body segment and the support segment is tapered, so that the support segment can be folded relative to the main body segment. The length of the support segment is greater than the diameter of the borehole, and the support segment constitutes the support member.

[0025] Compared with the prior art, the explosive spacer provided by this utility model has a tray with a feeding channel and a backstop device inside the feeding channel. The upper end of the flexible bag is connected to the feeding channel, and the diameter of the flexible bag is the same as the diameter of the feeding channel. In specific use, explosives are first loaded into the flexible bag through the feeding channel until the flexible bag is full. Then, the flexible bag and the tray are placed into the borehole together, and the lower end of the flexible bag is in contact with the explosives at the bottom of the borehole. Since the tray can abut against the side wall of the borehole, the tray, the flexible bag, and the explosives at the bottom of the borehole together form a cavity, which acts as an air spacer. Then, explosives are continued to be loaded into the borehole (above the tray) to complete the loading of explosives. After the explosives are loaded, the flexible bag can effectively support the upper part through the bearing capacity of the explosives themselves, thereby simplifying the loading process and reducing the blasting cost. The backstop device can effectively prevent the explosives in the flexible bag from overflowing from the feeding channel, ensuring the supporting strength of the flexible bag after loading. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the first embodiment of the explosion-transmitting spacer provided by this utility model;

[0027] Figure 2 yes Figure 1 Front view of the detonator-transmitting spacer;

[0028] Figure 3 This is a schematic diagram of the structure of the second embodiment of the explosion-transmitting spacer provided by this utility model;

[0029] Figure 4 yes Figure 3 Front view of the detonator-transmitting spacer;

[0030] Figure 5 This is a structural schematic diagram of the third embodiment of the explosion-transmitting spacer provided by this utility model;

[0031] Figure 6 yes Figure 5 Front view of the detonator-transmitting spacer;

[0032] Figure 7 This is a schematic diagram of the fourth embodiment of the explosion-transmitting spacer provided by this utility model;

[0033] Figure 8 This is a front view of the first support plate and the second support plate provided by this utility model;

[0034] Figure 9 This is a front view of the first buckle, the second buckle, and the third buckle provided by this utility model;

[0035] Figure 10 This is a perspective view of an embodiment of the tray and anti-reverse device provided by this utility model;

[0036] Figure 11 yes Figure 10 A three-dimensional schematic diagram of the middle tray and the backstop device from another perspective;

[0037] Figure 12 This is a perspective view of yet another embodiment of the tray and anti-reverse device provided by this utility model;

[0038] Figure 13 yes Figure 12 A three-dimensional diagram of the middle tray;

[0039] Figure 14 yes Figure 12 A three-dimensional schematic diagram of the anti-reverse valve;

[0040] Figure 15 This is a perspective view of another embodiment of the tray and anti-reverse device provided by this utility model;

[0041] Figure 16 yes Figure 15 Top view of the center tray and backstop device;

[0042] Figure 17 yes Figure 15 A three-dimensional schematic diagram of another form of the anti-reverse device;

[0043] Figure 18 This is a front sectional view of another embodiment of the tray and anti-reverse device provided by this utility model;

[0044] Figure 19 This is a top view of an embodiment of the pressure relief hole on the tray provided by this utility model;

[0045] Figure 20 This is a top view of an embodiment of the water-permeable holes on the tray provided by this utility model;

[0046] Figure 21 This is a perspective view of another embodiment of the water-permeable holes on the tray provided by this utility model.

[0047] Explanation of reference numerals in the attached figures:

[0048] 1-Tray, 11-Pressure relief hole, 12-Tray bottom, 13-Tray side, 131-First spring, 132-Second spring, 133-Flexible connection, 14-Water permeable hole, 15-Feeding channel;

[0049] 2-Flexible bag, 21-Main body section, 22-Supporting section;

[0050] 3-Backstop device, 31-First mounting component, 32-First backstop plate, 33-Second mounting component, 331-Backstop part, 34-Second backstop plate, 35-Connecting bag, 36-Tightening component, 37-Connecting rigid tube;

[0051] 4-Supporting component, 41-First support plate, 42-Second support plate, 43-First buckle, 44-Second buckle, 45-Third buckle. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0053] To address the technical problem in existing technologies where the explosive charge is made of flexible material, the explosive inside the charge is easily squeezed out of the feed channel when the detonator is placed in the borehole, resulting in poor support, this invention provides a detonator that can effectively prevent the explosive in the flexible bag from overflowing from the feed channel, ensuring the support strength of the flexible bag after charging.

[0054] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a detonator spacer in one embodiment of the present invention.

[0055] This utility model provides a detonation-transmitting spacer for use in a borehole. The bottom of the borehole is filled with explosives. The spacer includes a tray 1 and a flexible bag 2. The tray 1 has a feeding channel 15, and the circumference of the tray 1 is used to abut against the side wall of the borehole. The upper end of the flexible bag 2 is connected to the feeding channel 15, and the diameter of the flexible bag 2 is the same as the diameter of the feeding channel 15. The feeding channel 15 is used to feed explosives into the flexible bag 2. The tray 1, the flexible bag 2, and the explosives at the bottom of the borehole together form a cavity. The feeding channel 15 is also provided with a backflow preventer 3, which is used to prevent the explosives in the flexible bag 2 from overflowing from the feeding channel 15.

[0056] Please see Figure 2 , 4 6. In this embodiment, the tray 1 is provided with a feeding channel 15, and a backstop device 3 is also provided in the feeding channel 15. The upper end of the flexible bag 2 is connected to the feeding channel 15, and the diameter of the flexible bag 2 is the same as the diameter of the feeding channel 15. In specific use, explosives are first loaded into the flexible bag 2 through the feeding channel 15 until the flexible bag 2 is full. Then, the flexible bag 2 and the tray 1 are placed into the borehole, and the lower end of the flexible bag 2 is made to contact the explosives at the bottom of the borehole. Since the tray 1 can contact the side wall of the borehole... The tray 1, the flexible bag 2, and the explosive at the bottom of the borehole together form a cavity, which acts as an air spacer. Then, explosives are continuously loaded into the borehole (above the tray 1) to complete the loading. After loading, the flexible bag 2 can effectively support the upper part through the load-bearing capacity of the explosive itself, thereby simplifying the loading process and reducing the blasting cost. The backstop device 3 can effectively prevent the explosive in the flexible bag 2 from overflowing from the feed channel 15, ensuring the support strength of the flexible bag 2 after loading.

[0057] Please see Figure 1 , 35. In use, explosives are added to the tray 1. The explosives slide into the flexible bag 2 through the feeding channel 15. After the flexible bag 2 is filled with explosives, it forms a cylindrical shape, and the diameter of the cylinder is smaller than the diameter of the blast hole, thus forming an air spacer. The cylinder has the function of supporting the explosives above the tray 1. Since the cylinder is filled with explosives, it can also play a role in transmitting the detonation. The whole device occupies a small volume and is easy to use.

[0058] The backstop device 3 has various forms.

[0059] Please see Figures 10 to 14 In one embodiment, the backstop device 3 includes a first mounting member 31. The first mounting member 31 has a first mounting channel extending in a vertical direction. The first mounting channel is connected to the feed channel 15. The inner sidewall of the first mounting channel is provided with a plurality of elastic first backstop plates 32. The plurality of first backstop plates 32 are arranged circumferentially along the first mounting member 31, and each first backstop plate 32 extends toward the middle of the feed channel 15. The first backstop plates 32 are gradually inclined downward in the direction toward the middle of the feed channel 15. The plurality of first backstop plates 32 together block the feed channel 15.

[0060] Specifically, one end of the first anti-reverse plate 32 is installed on the inner wall of the first installation channel, while the other end extends to the middle of the first installation channel. The first anti-reverse plate 32 is elastic, thus allowing it to elastically extend and retract along the path of approaching and moving away from the middle of the first installation channel. The first installation channel is connected to the feeding channel 15. In the initial state, multiple first anti-reverse plates 32 are closed together to block the feeding channel 15. When explosives are added, the explosives can push open multiple first anti-reverse plates 32 and enter the flexible bag 2. After the explosives are added, the first anti-reverse plates 32 can return to their initial state under their own elastic force. Since the first anti-reverse plate 32 is gradually tilted downwards in the direction towards the middle of the first installation channel, the explosives in the flexible bag 2 cannot push the first anti-reverse plate 32, thus achieving the purpose of anti-reverse.

[0061] Furthermore, since the feed channel 15 is circular, the first mounting member 31 is adapted to the feed channel 15 in a circular configuration. In order to adapt to the feed channel 15, the first backstop 32 is arc-shaped, and each first backstop 32 is gradually tapered toward the center of the feed channel 15. Multiple first backstops 32 together form a conical structure, thereby blocking the feed channel 15.

[0062] Please see Figure 10 and Figure 11 The first mounting component 31 may be integrally formed with the tray 1, that is, the first mounting component 31 is part of the tray 1, the first mounting channel is the feeding channel 15, the first backstop 32 is disposed on the feeding channel 15, and the first backstop 32 is integrally formed with the tray 1.

[0063] Please see Figures 12 to 14 The first mounting component 31 can also be detachably connected to the tray 1, which facilitates processing, production, and transportation.

[0064] There are multiple ways to detach and connect the first mounting component 31 to the tray 1.

[0065] In one embodiment, the outer diameter of the first mounting member 31 is the same as the inner diameter of the feeding channel 15. The first mounting member 31 is inserted into the feeding channel 15 to achieve the purpose of disassembly and connection. At this time, the first mounting member 31 can also serve as a connecting component between the flexible bag 2 and the tray 1, that is, the upper end of the flexible bag 2 is fitted around the outer periphery of the first mounting member 31, and then the first mounting member 31 together with the flexible bag 2 is inserted into the feeding channel 15.

[0066] Please see Figures 12 to 14 In another embodiment, the backstop device 3 further includes a first mounting tube, the mounting channel and the feed channel 15 have the same diameter, the outer diameter of the first mounting tube is equal to the inner diameter of the feed channel 15, the first mounting tube is inserted into the feed channel 15, and the upper end of the first mounting tube protrudes from the feed channel 15, and the first mounting member 31 is installed on the outer periphery of the first mounting tube, thereby achieving the purpose of disassembly and connection.

[0067] Please see Figures 15 to 17 In another embodiment, the backstop device 3 includes a second mounting member 33 and a second backstop plate 34. The second mounting member 33 is provided with a second mounting channel extending in a vertical direction. The second mounting channel is connected to the feed channel 15. A backstop portion 331 is provided in the second mounting channel. The second backstop plate 34 is elastically rotatably mounted in the mounting channel along a horizontal axis and located below the backstop portion 331, so that when the second backstop plate 34 rotates upward to abut against the backstop portion 331, the second backstop plate 34 blocks the feed channel 15.

[0068] Specifically, the second backstop 34 is elastically rotatably mounted on the side wall of the second mounting channel, and the second backstop 34 is located below the backstop portion 331. That is, in the initial state, the second backstop 34 is horizontally arranged and fits against the lower side of the backstop portion 331. When the second backstop 34 is subjected to external force, it can rotate downward around its rotating end. When the external force is removed, it can return to the initial state under the action of elasticity. And because the backstop portion 331 is provided, in the initial state, the second backstop 34 can block the feed channel 15 and it cannot rotate upward, thus achieving the backstop effect.

[0069] The form of elastic extension and retraction of the second backstop 34 is not limited. It can be that the second backstop 34 itself is elastic, or the second backstop 34 can achieve its elastic rotation by being installed with a torsion spring.

[0070] Please see Figures 15 to 17 Furthermore, the number of the second backstop 34 is not limited, and the position of its rotational installation is also different depending on the number. When there is one second backstop 34, the middle part of the second backstop 34 is rotatably installed on the side wall of the second installation channel. When there are two second backstops 34, the second backstop 34 is semi-circular in shape, and the end of the second backstop 34 away from the other second backstop 34 is rotatably installed on the side wall of the second installation channel. The second backstop 34 and the second mounting member 33 are integrally formed, and the second backstop 34 itself is elastic.

[0071] Please see Figures 15 to 16 The second mounting component 33 may be integrally formed with the tray 1, that is, the second mounting component 33 is part of the tray 1, the second mounting channel is the feeding channel 15, the second backstop 34 and the backstop part 331 are both disposed on the feeding channel 15, and the second backstop 34 is integrally formed with the tray 1.

[0072] The second mounting component 33 can also be detachably connected to the tray 1, which facilitates processing, production, and transportation.

[0073] There are multiple ways to detach and connect the second mounting component 33 to the tray 1.

[0074] Please see Figure 17In one embodiment, the outer diameter of the second mounting member 33 is the same as the inner diameter of the feeding channel 15. The second mounting member 33 is inserted into the feeding channel 15 to achieve the purpose of disassembly and connection. At this time, the second mounting member 33 can also serve as a connecting component between the flexible bag 2 and the tray 1, that is, the upper end of the flexible bag 2 is fitted around the outer periphery of the second mounting member 33, and then the second mounting member 33 together with the flexible bag 2 is inserted into the feeding channel 15.

[0075] In another embodiment, the backstop device 3 further includes a second mounting tube, the second mounting channel and the feed channel 15 having the same diameter, the outer diameter of the second mounting tube being equal to the inner diameter of the feed channel 15, the second mounting tube being inserted into the feed channel 15, and the upper end of the second mounting tube protruding from the feed channel 15, the second mounting member 33 being located above the tray 1, and the second mounting member 33 being installed on the outer periphery of the second mounting tube, thereby achieving the purpose of disassembly and connection.

[0076] Please see Figure 18 In another embodiment, the backstop device 3 includes a connecting bag 35 and a tightening member 36. The connecting bag 35 is arranged vertically and is located inside the tray 1. The lower end of the connecting bag 35 is connected to the feeding channel 15. The tightening member 36 is located at the upper end of the connecting bag 35 so that after the explosive is filled into the flexible bag 2, the tightening member 36 is used to tighten the upper end of the connecting bag 35.

[0077] Specifically, the backstop device 3 further includes a connecting rigid tube 37, the outer diameter of which is the same as the inner diameter of the feed channel 15. The connecting bag 35 is fitted around the outer periphery of the connecting rigid tube 37, and the connecting rigid tube 37 is inserted into the feed channel 15. In actual use, the receiving component loosens the upper end of the connecting bag 35, and then loads explosives into the connecting bag 35. The explosives enter the flexible bag 2 from the connecting bag 35. After the loading is completed, the tightening component 36 tightens the upper end of the connecting bag 35, thereby achieving the backstop effect.

[0078] The specific form of the tightening member 36 is not limited. In this embodiment, the tightening member 36 is a cable tie.

[0079] Furthermore, the diameter of the connecting bag 35 is the same as that of the flexible bag 2. The connecting bag 35 has two channels at its top through which cable ties can pass. In use, cable ties are threaded through these channels to seal the connecting bag 35. The number of cable ties is not limited; one cable tie can be threaded into the channel of the connecting bag 35 to form a loop, and tightening the cable tie seals the connecting bag 35. Alternatively, two cable ties can be threaded into the channel of the connecting bag 35 in opposite directions, forming a loop, and tightening both cable ties seals the connecting bag 35. To increase the sealing performance of the connecting bag 35, two thick pieces of fabric can be added inside the connecting bag 35. After tightening the cable ties, the fabric is also folded at the bag opening, providing a seal. This allows the explosive in the flexible bag 2 to be sealed inside the flexible bag 2 after loading. Simultaneously, the connecting bag 35 and the flexible bag 2 are connected as one unit, enabling the flexible bag 2 to withstand pressure and provide support. This setup is inexpensive and convenient to use.

[0080] Please see Figure 19 In some embodiments, the tray 1 or the anti-reverse device 3 is further provided with a pressure relief hole 11 communicating with the flexible bag 2.

[0081] The explosive is a mixed emulsion explosive prepared on-site. After the detonating spacer is placed into the borehole, the explosive inside the flexible bag 2 will expand. Due to the presence of a backflow preventer 3, the pressure inside the flexible bag 2 will increase. To prevent it from failing due to excessive pressure, in this embodiment, the tray 1 is provided with a pressure relief hole 11. The pressure relief hole 11 connects the flexible bag 2 to the outside space. When the explosive inside the flexible bag 2 expands to a certain pressure, the explosive will leak out from the pressure relief hole 11. On the one hand, this can ensure that the pressure inside the detonating spacer reaches the pressure value required for support, and on the other hand, it can prevent the pressure inside the flexible bag 2 from becoming too high and failing.

[0082] It should be noted that the number and size of the pressure relief holes 11 can be set according to the actual situation, and will not be elaborated here.

[0083] The pressure relief hole 11 can be provided on the first check plate 32 or there can be a gap between the two second check plates 34, and the gap constitutes the pressure relief hole 11.

[0084] Please see Figures 20 to 21In some embodiments, the tray 1 includes a tray bottom 12 and a tray side 13 extending upward from the tray bottom 12. The tray side 13 is gradually widened from bottom to top and includes a plurality of elastic sidewalls. The plurality of elastic sidewalls are arranged circumferentially at intervals along the tray bottom 12. The bottom of each elastic sidewall is connected to the tray bottom 12. The elastic sidewalls are elastically extendable and retractable in directions close to and away from the center of the feed channel 15. A flexible connecting portion 133 is also provided between two adjacent elastic sidewalls. The bottom of the flexible connecting portion 133 is connected to the tray bottom 12, and the flexible connecting portion 133 is bent inward.

[0085] Specifically, the upper end of the tray side 13 is used to abut against the side wall of the blast hole. Since the blast hole is circular, the bottom 12 of the tray is circular. The tray side 13 extends upward along the circumference of the bottom 12 of the tray and gradually widens, making the tray side 13 generally funnel-shaped, which facilitates abutment against the side wall of the blast hole and also facilitates loading explosives. The upper end of the tray side 13 has the largest diameter. The flexible bag 2 is connected to the bottom 12 of the tray, and the explosives enter the flexible bag 2 through the tray cavity.

[0086] Specifically, due to the complex geological conditions at the site, the diameters of the boreholes obtained by drilling vary slightly. Since the side portion 13 of the tray needs to be tightly fitted to the sidewall of the borehole, in this embodiment, multiple elastic sidewalls extend upward from the circumference of the bottom 12 of the tray. These multiple elastic sidewalls are evenly spaced along the circumference of the bottom 12 of the tray, and a flexible connecting part 133 is provided between two adjacent elastic sidewalls. The flexible connecting part 133 and the elastic sidewall together constitute the side portion 13 of the tray. The elastic sidewall itself is elastic, allowing it to elastically expand and contract in the direction of approaching and moving away from the center of the feed channel 15. The flexible connecting part 133 can adaptively adjust according to the position of the elastic sidewall, forming an umbrella-shaped structure that can contract inward and expand outward, thereby enabling it to fit tightly to different boreholes.

[0087] Specifically, different mines use different borehole diameters, and the trays are available in matching models according to the different borehole diameters.

[0088] In this embodiment, the elastic sidewall, the flexible connecting part 133, and the tray bottom 12 are integrally formed.

[0089] Since some blast holes contain water, this application also provides various forms of water-permeable devices to accommodate blast holes with water, so that the blast-transmitting spacer can be used when there is water in the blast hole.

[0090] Please see Figure 20 In one embodiment, the tray 1 is further provided with a water-permeable hole 14 communicating with the cavity.

[0091] Specifically, the permeable hole 14 connects the cavity and the space above the tray 1. When the explosive spacer is placed into the borehole, the water in the borehole can flow through the permeable hole 14 to the space above the tray 1, preventing the explosive spacer from sinking. The water in the borehole provides buoyancy to the explosive spacer, which slowly sinks until the lower end of the flexible bag 2 abuts against the emulsion explosive in the borehole. The emulsion explosive and water support the explosive spacer to prevent it from sinking, allowing the explosive to continue being loaded into the borehole. The water between the explosive spacer and the side wall of the borehole supports the upper explosive, forming a structure where the explosive and the explosive spacer are spaced apart. Because the emulsion explosive and water are immiscible and water is incompressible, the explosive above the explosive spacer will not flow into the cavity through the permeable hole 14. Furthermore, by setting the permeable hole 14, the downward resistance of the explosive spacer in the water can be reduced.

[0092] Please see Figure 21 In another embodiment, two adjacent elastic sidewalls include a first elastic piece 131 and a second elastic piece 132, the area of ​​the first elastic piece 131 is larger than the area of ​​the second elastic piece 132, and there is a gap between the first elastic piece 131 and the adjacent flexible connection portion 133.

[0093] Specifically, the gap also connects the cavity and the space above the tray 1, so that when the explosive spacer is placed in the borehole, the water in the borehole can flow through the gap to the space above the tray 1, thus allowing the explosive spacer to be used smoothly even when there is water in the borehole. Furthermore, the second piece 132 will deflect towards the axis due to hydraulic force when the spacer descends, reducing the downward resistance and increasing the downward speed. When it touches the lower explosive, the second piece 132 will return to its original state, and the upper edge will cut tightly into the borehole wall, which will play an isolation role when the explosive is loaded.

[0094] Furthermore, the thickness of the first spring 131 is greater than the thickness of the second spring 132.

[0095] Please see Figure 7 In an embodiment where the detonator is applied to a water-filled borehole, the bottom of the flexible bag 2 is an isosceles triangle.

[0096] Specifically, because there is water inside the borehole, when the detonating spacer is placed into the borehole, the emulsion explosive and water at the bottom of the borehole will support the detonating spacer and prevent it from sinking. This allows the flexible bag 2 to be supported and fixed without the support member 4, relying solely on the buoyancy of the water in the borehole and the explosive at the bottom. In order to enable the flexible bag 2 to be placed in the designated position, the bottom of the flexible bag 2 is an isosceles triangular structure. This design can prevent the flexible bag 2 from getting stuck on the side wall of the borehole before being placed in the designated position.

[0097] Please see Figures 1 to 6 In some embodiments, the detonating spacer further includes a support member 4, which is disposed at the bottom of the flexible bag 2. The length of the support member 4 is greater than the diameter of the borehole. The support member 4 is used to be inclined to abut against the explosive at the bottom of the borehole to support the flexible bag 2.

[0098] In this embodiment, since the bottom of the borehole is connected to the explosive filling section, and the explosive is relatively soft, after the flexible bag 2 comes into contact with the bottom explosive, the flexible bag 2 will sink into the bottom explosive, resulting in a reduction in the height of the cavity and a decrease in the effectiveness of the air gap. Therefore, to prevent the flexible bag 2 from sinking into the bottom explosive, a support member 4 made of rigid material is provided at the bottom of the flexible bag 2. The length of the support member 4 is greater than the diameter of the borehole. The support member 4 is inserted into the borehole at an angle. When it touches the bottom explosive, it will jam against the side wall of the borehole, thereby supporting the flexible bag 2 to ensure the size of the air gap.

[0099] The support member 4 can take many forms.

[0100] Please see Figure 1 , 2 8. In one embodiment, the support member 4 includes a first support plate 41, the length of which is greater than the diameter of the blast hole, and a detonation hole is provided in the middle of the first support plate 41.

[0101] Specifically, the first support plate 41 is rectangular in shape, with a length greater than the diameter of the borehole and a width less than the diameter of the borehole. One end of the first support plate 41 is connected to the bottom of the flexible bag 2. When the explosive spacer is placed into the borehole, the first support plate 41 enters the borehole at an angle and can be locked in place when it comes into contact with the bottom explosive, thereby supporting the flexible bag 2. The explosive transmission hole can prevent the first support plate 41 from affecting the explosive transmission.

[0102] Please see Figure 3 , 48. In another embodiment, the support member 4 includes two second support plates 42, the sum of the lengths of the two second support plates 42 is greater than the diameter of the blast hole, the distance between the two second support plates 42 gradually increases from top to bottom, and a blast hole is provided at one end of the second support plate 42 near the other second support plate 42.

[0103] Specifically, the length and width of the second support plate 42 are both smaller than the diameter of the borehole, and the sum of the lengths of the two second support plates 42 is greater than the diameter of the borehole. One end of each second support plate 42 is connected to the bottom of the flexible bag 2. The distance between the two second support plates 42 gradually increases from top to bottom, forming a figure-eight structure. When the explosive spacer is placed into the borehole and the second support plate 42 comes into contact with the bottom explosive, the two second support plates 42 gradually expand outward, so that one end of the second support plate 42 comes into contact with the side wall of the borehole. Through the cooperation of the two second support plates 42, the purpose of supporting the flexible bag 2 is achieved.

[0104] Furthermore, the connection form between the support member 4 and the flexible bag 2 is not limited. It can be that the support member 4 is connected to the bottom of the flexible bag 2, or the support member 4 is inserted into the flexible bag 2.

[0105] Please see Figure 9 Based on the embodiment of inserting the support member 4 into the flexible bag 2, the explosive spacer further includes a first buckle 43. The first buckle 43 has a locking slot, which is elongated. The first buckle 43 is secured to the outer periphery of the flexible bag 2 through the locking slot, thereby dividing the flexible bag 2. In specific use, the support member 4 is first placed at the bottom of the flexible bag 2, then the first buckle 43 is placed on the outer periphery of the flexible bag 2 and moved to the upper end of the support member 4 to fix the support member 4. Then, explosives are added to the flexible bag 2. By setting the buckle, the flexible bag 2 is divided into upper and lower areas. The upper area is used to hold explosives, and the lower area is used to hold the support member 4.

[0106] Based on the embodiment of inserting the support member 4 into the flexible bag 2, the explosive spacer further includes a third buckle 45, one end of which is open. The third buckle 45 is engaged from the opening onto the outer periphery of the flexible bag 2, thereby separating the flexible bag 2. In specific use, at least two third buckles are used, and the two third buckles are engaged onto the outer periphery of the flexible bag 2 opposite to each other.

[0107] Furthermore, the support member 4 is made of a high-density, high-strength material, and also has a certain degree of elasticity.

[0108] Please see Figure 5 , 6 8. In another embodiment, the flexible bag 2 includes a main body segment 21 and a support segment 22 connected sequentially from top to bottom. The connection between the main body segment 21 and the support segment 22 is tapered, so that the support segment 22 can be folded relative to the main body segment 21. The length of the support segment 22 is greater than the diameter of the borehole, and the support segment 22 constitutes the support member 4.

[0109] Specifically, explosives are loaded into the flexible bag 2, and the explosives sequentially fill the support section 22 and the main body section 21. Due to the constricted connection between the main body section 21 and the support section 22, and the inherent flexibility of the flexible bag 2, the support section 22 can swing relative to the main body section 21. When the detonator is placed into the borehole, the lower end of the support section 22 abuts against the bottom explosives and is stuck on the side wall of the borehole. At this time, the support section 22 can support the main body section 21, thereby supporting the detonator.

[0110] There are various specific forms for tightening the connection between the main body segment 21 and the support segment 22.

[0111] In one embodiment, a stitch can be made at a designated position on the flexible bag 2. The length of the stitch is approximately one-third of the width of the flexible bag 2. When explosives are injected into the flexible bag 2, the explosives can fill the flexible bag 2 through the unstitched portion. The flexible bag 2 is divided into the main body section 21 and the support section 22 by the stitch. After the explosive spacer is placed into the borehole, the bottom of the flexible bag 2 will fold at the stitch when it presses against the explosives. As the upper pressure increases, the fold will close. The length of the folded part is greater than the borehole diameter, which can hold the borehole in place and support the explosive spacer and the upper explosives. The explosives in the folded part are connected to the explosives inside the flexible bag 2. The upper and lower pressures are the same, and the explosives will not leak out from the fold.

[0112] Please see Figure 5 , 6 8. In another embodiment, the explosive spacer further includes a second buckle 44, which has a through hole. The width of the two ends of the through hole is greater than the width in the middle. In specific use, the second buckle 44 can be fitted around the outer periphery of the flexible bag 2. When injecting explosives into the flexible bag 2, the explosives can fill the flexible bag 2 through the two ends of the through hole. The flexible bag 2 can also be folded at the second buckle 44.

[0113] In another embodiment, the explosive spacer further includes a cable tie disposed on the outer periphery of the flexible bag 2 to tighten the connection between the main body section 21 and the support section 22.

[0114] Furthermore, the flexible bag 2 of the explosion-transmitting spacer is made of high-density, high-strength materials, such as cotton fabrics, blended fabrics, and natural fiber fabrics.

[0115] In this embodiment, the explosion-transmitting spacer further includes a connecting pipe made of rigid material. The outer diameter of the connecting pipe is the same as that of the feeding channel 15. The upper end of the flexible bag 2 is fitted around the outer periphery of the connecting pipe, and then the connecting pipe together with the flexible bag 2 is inserted into the feeding channel 15. The connecting pipe is connected to the feeding channel 15. By setting the connecting pipe, it is convenient to connect the flexible bag 2 to the tray 1.

[0116] In this embodiment, to reduce the overall size of the device during transportation, after securing the flexible bag 2, it is folded from bottom to top onto the tray 1. A cable tie is inserted from bottom to top through a pre-drilled hole in the tray 1, and then threaded back through the other end to cover the folded flexible bag 2. The cable tie is then secured below the tray 1, forming a loop. Tightening the cable tie above the tray secures the folded flexible bag 2, with the head of the cable tie positioned below the tray. The cable tie head is only subjected to tension and is less susceptible to external interference that could cause it to tighten. During field use, simply pull the cable tie from below the tray 1 to release the flexible bag 2. There is a step of a certain height below the tray 1; after releasing the flexible bag 2, tightening the cable tie again secures it around the step. This prevents the cable tie from interfering with the flexible bag 2 when placing the spacer into the borehole. This design significantly reduces assembly costs and transportation space, and the stable structure facilitates transportation, expanding the applicability of the spacer.

[0117] To better understand this utility model, the following is combined with... Figures 1 to 21 The technical solution of this utility model is described in detail below:

[0118] Select the appropriate combination type of tray 1 and flexible bag 2 according to the length of the blast hole designed for blasting. Fully unfold the flexible bag 2 and inject the on-site mixed emulsion explosive into the spacer until the flexible bag 2 is completely filled. Place the detonating spacer with the explosive charge in the designed blast hole, continue to inject explosive into the blast hole until the designed charge is reached, seal the blast hole and blast.

[0119] This invention connects the tray 1 and the flexible bag 2. During use, explosives are added to the upper tray 1, and the explosives slide into the flexible bag 2. During blasting, it replaces existing detonator devices, achieving the detonation transmission function. Furthermore, as more explosives are added, the tray 1 forms a self-sealing mechanism, preventing explosives from flowing into the cavity and acting as an air spacer. After loading, the flexible bag 2, through the explosives' own load-bearing capacity and the support member 4, effectively supports the upper part, simplifying the loading process and reducing blasting costs. The support member 4 can lock the sidewall of the blast hole, fixing the position of the detonator. Simultaneously, the use of the flexible bag 2 optimizes the previously used PVC pipe, making the spacer smaller, reducing logistics costs, and providing convenient and inexpensive operation.

[0120] The explosion-transmitting spacer provided by this utility model also has a design for water holes, which can be used when there is water in the blast hole, so as to adapt to the complex site environment of the mine.

[0121] This utility model has the following advantages:

[0122] (1) It has the function of transmitting detonation between isolated explosive charges.

[0123] (2) The air-spaced loading process has been simplified.

[0124] (3) The detonation transmission is non-directional and can be transmitted both vertically and horizontally.

[0125] (4) Since it is not necessary to set an initiation point for each isolated charge, the flexibility and precision of the air gap charge design are improved.

[0126] (5) Using flexible bags instead of PVC pipes makes the spacers smaller, reduces logistics costs, makes them easier to use, and lowers the cost of the spacers.

[0127] (6) The bowl-shaped tray has a backstop device and a pressure relief hole.

[0128] (7) A specially designed bowl-shaped tray that can be used when there is water in the borehole.

[0129] (8) This application has a reverse stop function, which can realize the one-way passage of explosives.

[0130] (9) The backstop device is detachably connected to the tray, and can be added or not depending on the on-site construction conditions.

[0131] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A booster interval device for use in a blasthole, the blasthole being filled with explosive at the bottom, characterized in that It comprises: a tray provided with a feeding channel, a circumference of the tray being used to abut against a sidewall of a blast hole; and a flexible bag, an upper end of the flexible bag being communicated with the feeding channel, a diameter of the flexible bag being the same as a diameter of the feeding channel, the feeding channel being used to deliver explosive into the flexible bag, the tray, the flexible bag and the explosive at the bottom of the blast hole jointly forming a cavity; wherein, a check device is further arranged in the feeding channel, the check device being used to limit the explosive in the flexible bag from overflowing out of the feeding channel.

2. The transferable spacer of claim 1, wherein, The check device comprises a first mounting member provided with a first mounting channel extending in a vertical direction, the first mounting channel being connected with the feeding channel, an inner sidewall of the first mounting channel being provided with a plurality of elastic first check pieces, the plurality of first check pieces being arranged along a circumferential direction of the first mounting member, each of the first check pieces being arranged to extend towards a middle part of the feeding channel, and the first check pieces being arranged to gradually incline downwards in a direction towards the middle part of the feeding channel, the plurality of first check pieces jointly blocking the feeding channel; or The check device comprises a second mounting member and a second check piece, the second mounting member being provided with a second mounting channel extending in a vertical direction, the second mounting channel being connected with the feeding channel, a check part being arranged in the second mounting channel, the second check piece being elastically rotatably arranged in the mounting channel below the check part, so that when the second check piece rotates upwards to abut against the check part, the second check piece blocks the feeding channel.

3. The transferable spacer of claim 2, wherein, The first mounting member or the second mounting member is detachably connected with the tray.

4. The transferable spacer of claim 1, wherein, The check device comprises a connecting bag and a tightening member, the connecting bag being arranged in a through manner from top to bottom, the connecting bag being arranged in the tray, a lower end of the connecting bag being communicated with the feeding channel, the tightening member being arranged at an upper end of the connecting bag, so that after explosive filling of the flexible bag is completed, the tightening member is used to tighten the upper end of the connecting bag.

5. The primable spacer of claim 1, wherein, A pressure relief hole is further arranged on the tray or the check device to communicate with the flexible bag.

6. The primable spacer of claim 1, wherein, The tray comprises a tray bottom and a tray sidewall extending upwards from the tray bottom, the tray sidewall being arranged in a gradually expanding manner from bottom to top, the tray sidewall comprising a plurality of elastic sidewalls, the plurality of elastic sidewalls being arranged in a spaced manner along a circumferential direction of the tray bottom, a bottom of each of the elastic sidewalls being connected with the tray bottom, the elastic sidewalls being elastically stretchable and retractable in a direction close to and away from a center of the feeding channel; wherein, a flexible connecting part is further arranged between two adjacent elastic sidewalls, a bottom of the flexible connecting part being connected with the tray bottom, the flexible connecting part being arranged to bend inwards.

7. The transferable spacer of claim 6, wherein, The tray is further provided with a water permeable hole communicated with the cavity; and / or Two adjacent elastic sidewalls comprise a first elastic piece and a second elastic piece, an area of the first elastic piece being greater than an area of the second elastic piece, the first elastic piece and the adjacent flexible connecting part having a gap therebetween.

8. The transferable spacer of claim 1, wherein, The booster interval device further comprises a support arranged at the bottom of the flexible bag, the length of the support being greater than the diameter of the blast hole, and the support is arranged to be in contact with the explosive at the bottom of the blast hole to support the flexible bag.

9. The transferable spacer of claim 8, wherein, The support comprises a first support plate, the length of the first support plate being greater than the diameter of the blast hole, and a booster hole is arranged at the middle of the first support plate; or The support comprises two second support plates, the sum of the lengths of the two second support plates being greater than the diameter of the blast hole, the distance between the two second support plates gradually increasing from top to bottom, and a booster hole is arranged at the end of one of the second support plates close to the other second support plate.

10. The primable spacer of claim 8, wherein, The flexible bag comprises a main body section and a support section connected in sequence from top to bottom, the connection between the main body section and the support section is arranged to be tapered to allow the support section to be foldably arranged relative to the main body section, the length of the support section being greater than the diameter of the blast hole, and the support section constitutes the support.

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