Non-primed booster spacer

Abstract

The utility model discloses a precharge -free interval device of can transmission explosion, including the pipe, and the pipe one end is connected with soft bag, tray, and the pipe other end is communicated with soft bag through the hose. Precharge -free interval device of can transmission explosion, the utility model simplifies the field construction technology, and the hole mouth is simplified to the medicine step, solves the need in the hole mouth to the interval device of can transmission explosion and hits the link of medicine, and the empty interval device of can transmission explosion can be directly placed in the hole with this device, then carries out normal medicine link, and has improved the support effect of interval device of can transmission explosion to upper explosive.

Description

Technical Field

[0001] This utility model belongs to the field of blasting equipment technology and relates to a pre-chargeable detonator. Background Technology

[0002] In the field of industrial blasting, large-scale projects such as mining, tunnel excavation, and roadbed construction place stringent requirements on the safety, economy, and blasting effect of explosives. This has led to the formation of two main categories of industrial explosives: packaged and field-mixed. While packaged explosives offer convenient transportation and immediate use, in large-scale operations, they require pre-packaging according to the number and depth of boreholes. This not only carries the risk of measurement errors but also necessitates additional manpower for handling and loading. Furthermore, the coupled loading method between the explosive and the borehole wall can easily lead to excessive concentration of explosive energy on the borehole wall, resulting in over-crushing of the ore and excessive residue at the base. Additionally, the explosive consumption per unit of work (explosive consumption per unit) is relatively high, making it difficult to adapt the overall construction cost and efficiency to the needs of modern engineering projects.

[0003] Compared to packaged explosives, on-site mixed explosives use specialized equipment to directly mix the explosive raw materials at the construction site and inject them into the boreholes. This effectively avoids measurement deviations in the pre-packaging process, achieves precise matching of explosive dosage with borehole parameters, significantly reduces safety risks during storage and transportation, eliminates the need for packaging materials, significantly reduces operating costs, and improves the degree of automation. Therefore, it is gradually becoming the preferred solution in large open-pit mines, long-distance tunnels, and other projects.

[0004] To further optimize the blasting efficiency of mixed explosive charges in the field, the industry widely adopts air-spaced charging technology. This technology changes the energy transfer method of traditional coupled charges by setting air gaps between explosive columns in the borehole. Air, as a spacer medium, can buffer the direct impact of the detonation wave on the borehole wall, reducing the impact and fragmentation of ore and rock caused by coupled charges. At the same time, the air gaps allow the detonation energy to diffuse more evenly out of the borehole, expanding the range of the ore and rock fracture zone. This allows more of the explosive energy to be used for ore and rock fragmentation rather than borehole wall damage, ultimately achieving the effects of reduced explosive consumption, reduced root size, and more uniform blast fragment size, significantly improving the effective utilization rate of explosive blasting energy.

[0005] However, existing technologies have significant limitations when using on-site mixed emulsion explosives with detonating spacers. Due to the structural design limitations of traditional detonating spacers, they must be pre-filled with explosives to ensure the continuity of subsequent detonations. Therefore, during construction, operators must first inject the on-site mixed emulsion explosives into the detonating spacer at the borehole opening. After the spacer is filled with explosives, it is then lowered as a whole to the designated interval position within the borehole. This "orifice loading - spacer installation" process not only adds to the construction steps but also presents multiple problems: Firstly, the operating space at the orifice is usually quite narrow, and the on-site environment is often accompanied by dust and humidity fluctuations. During the injection of explosives into the spacers, leakage and incomplete filling are prone to occur, resulting in explosive waste and potentially causing interruptions in detonation transmission due to uneven distribution of explosives within the spacers, affecting the stability of the entire blasting network. Secondly, each borehole requires separate orifice loading and lowering of the spacers. In large-scale blasting operations, this significantly prolongs the single-hole operation time, reducing overall construction efficiency. This step can easily become a bottleneck in construction progress, especially in projects with tight schedules. Furthermore, during the temporary orifice loading process, the explosives are exposed to an open environment. Although on-site mixed explosive loading is relatively safe, it still increases the risk of accidental contact and contamination, which does not conform to the core principle of "safety first" in industrial blasting operations.

[0006] In summary, the existing process for adapting detonator spacers to on-site mixed emulsion explosives requires an additional spacer loading step at the borehole, resulting in cumbersome construction procedures and low efficiency. There is an urgent need for a detonator spacer structure that can simplify the process and adapt to on-site mixed loading operations. Utility Model Content

[0007] The purpose of this invention is to provide a detonator that does not require pre-loading of explosives, which solves the problem in the existing technology that when using a detonator in conjunction with on-site mixing of emulsion explosives, it is necessary to first inject explosives into the spacer at the borehole opening before placing the spacer into the borehole, resulting in a cumbersome construction process.

[0008] The technical solution adopted by this utility model is a pre-charge-free explosive-transmitting spacer, including a through pipe, one end of which is connected to a soft bag or a tray, and the other end of which is connected to the soft bag through a flexible hose.

[0009] The features of this utility model also include: The tube structure is hollow and tubular, with one end of the tube closed and the other end connected to the tray.

[0010] A through hole is provided on the side wall of one end of the pipe.

[0011] The soft bag covers the outer wall of the end where the tube connects to the tray.

[0012] The soft bag has a circular structure and a sealed cavity inside.

[0013] One end of the hose is connected to the inside of the closed end of the tube through a through hole on the side wall of the tube, and the other end of the hose is connected to the sealed cavity inside the soft bag.

[0014] The tray has a funnel-shaped structure, with the smaller end of the tray connected to the unsealed end of the tube, and the tray is connected to the inside of the tube.

[0015] When the tube, tray, soft bag, or hose is located inside the blast hole, the outer wall of the larger end of the tray is fitted to the inner wall of the blast hole.

[0016] The borehole is filled with explosives, which enter the tube through a tray, causing the soft bag to expand and the outer wall of the soft bag to adhere to the inner wall of the borehole.

[0017] When the soft bag is in an inflated state, the outer diameter is not less than 1.2 times the diameter of the blast hole.

[0018] The beneficial effects of this utility model are: Simplify on-site construction process: Eliminate the step of injecting explosives into the detonator at the borehole opening, which is required in the existing technology. The empty spacer can be placed directly in the designated position in the borehole, and then the normal on-site mixing and filling of explosives can be carried out. This reduces construction steps, improves the overall blasting construction efficiency, and avoids problems such as waste and pollution that may occur from temporary loading at the borehole opening. Enhanced support effect: Through the synergistic effect of the soft bag (the outer wall of which is attached to the inner wall of the borehole after expansion, and the outer diameter is not less than 1.2 times the diameter of the borehole) and the tray, the support effect of the detonating spacer on the upper explosive is enhanced, ensuring the stability of the spacer in the borehole and preventing the upper explosive from shifting or piling unevenly. Ensuring the reliability of explosive loading and detonation transmission: Gas in the through-pipe is introduced into the soft bag using a flexible hose to prevent residual gas inside the spacer from hindering explosive filling. This ensures that the explosive completely fills the through-pipe and tray channel of the spacer, avoiding interruption of detonation transmission due to incomplete explosive filling and ensuring the continuity of detonation transmission in the blasting network. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the pre-charge-free detonator spacer of this utility model; Figure 2 This is a cross-sectional structural diagram of the pre-charge-free detonator spacer of this utility model; Figure 3 This is a schematic diagram of the structure of the pre-charge-free explosive-transmitting spacer of this utility model when in use.

[0020] In the diagram, 1. hose; 2. soft bag; 3. tray; 4. through pipe; 5. blast hole; 6. explosive. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0022] Pre-charge-free detonator spacers, such as Figure 1 and Figure 2 As shown, the device includes a tube 4, one end of which is connected to a soft bag 2 and a tray 3, and the other end of which is connected to the soft bag 2 via a flexible tube 1. The tube 4 is a hollow tube, with one end closed and the other end connected to the tray 3; a through hole is provided on the side wall of the closed end of the tube 4; the soft bag 2 is wrapped around the outer wall of the end of the tube 4 connected to the tray 3; the soft bag 2 is annular in shape and has a sealed cavity inside; one end of the flexible tube 1 is connected to the inside of the closed end of the tube 4 through the through hole on the side wall of the tube 4, and the other end of the flexible tube 1 is connected to the sealed cavity inside the soft bag 2; the tray 3 is funnel-shaped, with the smaller end of the tray 3 connected to the unclosed end of the tube 4, and the tray 3 is connected to the inside of the tube 4. Combination Figure 3 As shown, when the tube 4, tray 3, soft bag 2, and hose 1 are located inside the borehole 5, the outer wall of the larger end of the tray 3 is fitted to the inner wall of the borehole 5; the borehole 5 is filled with explosive 6, and the explosive 6 enters the tube 4 through the tray 3, causing the soft bag 2 to be in an inflated state and the outer wall of the soft bag 2 to be fitted to the inner wall of the borehole 5; when the soft bag 2 is in an inflated state, the outer diameter is not less than 1.2 times the diameter of the borehole 5.

[0023] The pre-charge-free detonator, as a specialized device adapted to on-site mixed emulsion explosive blasting operations, is designed around three core requirements: "simplified construction, enhanced support, and guaranteed detonation transmission". It consists of four core components: a through pipe 4, a tray 3, a soft bag 2, and a flexible hose 1. These components form a complete structural system that works in synergy through precise connections. Furthermore, the shape, size, and function of each component are deeply matched to the actual needs of the blasting operation scenario.

[0024] From the perspective of the core load-bearing and detonation transmission element—the through-tube 4—it serves as the skeleton of the entire spacer and the detonation transmission channel for the explosive charge. Its overall hollow tubular structure ensures that the explosive charge 6 is fully filled to form a continuous detonation transmission path, while also providing space for internal gas flow. The two ends of the through-tube 4 have clearly differentiated functions: one end is closed, with a through-hole on its sidewall, which is the key outlet for the gas venting from the inside of the through-tube 4; the other end is fixedly connected to the tray 3, and the hollow cavity of the through-tube 4 is completely connected to the interior of the tray 3, ensuring that the explosive charge 6 can flow smoothly from the tray 3 into the through-tube 4. The material and length of the through-tube 4 must be adapted according to parameters such as the depth of the borehole 5 and the type of explosive to ensure sufficient structural strength and detonation transmission stability.

[0025] The tray 3, serving as an explosive guide and initial positioning element, has a funnel-shaped structure. This design combines the dual functions of "guided loading" and "lateral positioning." The two ends of the tray 3 have significantly different dimensions: the smaller end is fixedly connected to the unsealed end of the tube 4, and the two are internally connected. The inclined inner wall of the funnel guides the explosive 6 to naturally converge into the hollow cavity of the tube 4 during filling, preventing the explosive from accumulating at the inlet of the spacer; the outer wall of the larger end fits tightly against the inner wall of the borehole 5 after the spacer is inserted into the borehole 5. This fit achieves the initial lateral positioning of the spacer within the borehole 5, preventing the spacer from shifting before the explosive is filled, and laying the foundation for subsequent loading and support.

[0026] The flexible bag 2, which serves as a support and reinforcement, has an overall ring-shaped structure. Its installation position and shape design directly affect the support stability of the spacer. The flexible bag 2 is wrapped around the outer wall of the connection end between the through pipe 4 and the tray 3, and the flexible bag 2 has a sealed cavity inside. This sealed cavity is the core space for storing gas and achieving expansion. When the explosive 6 is not filled, the flexible bag 2 is in a contracted state, which facilitates the overall lowering of the spacer to the designated position of the borehole 5. When the explosive 6 flows into the through pipe 4 through the tray 3, the gas in the through pipe 4 is compressed and introduced into the sealed cavity of the flexible bag 2, causing the flexible bag 2 to gradually expand until its outer wall is tightly fitted with the inner wall of the borehole 5. According to the design requirements, the outer diameter of the expanded flexible bag 2 is not less than 1.2 times the diameter of the borehole 5. This size design ensures that the flexible bag 2 can form sufficient compressive force on the inner wall of the borehole 5, which not only further fixes the overall position of the spacer, but also provides stable vertical support to the tray 3 from below, preventing the upper explosive 6 from shifting or piling unevenly due to insufficient support.

[0027] The flexible hose 1, a key component for gas flow, connects the through-tube 4 and the soft bag 2, creating a complete gas flow path. One end of the flexible hose 1 communicates with the internal cavity of the through-tube 4 through a through-hole on the closed side wall of the through-tube 4; the other end communicates with the sealed cavity inside the soft bag 2, forming a gas flow channel of "through-tube 4 interior—flexible hose 1—soft bag 2 sealed cavity". This design ensures that during the filling of the through-tube 4 with explosive 6, the gas originally retained in the through-tube 4 can be continuously compressed and completely introduced into the soft bag 2 through the flexible hose 1. This avoids gas stagnation in the through-tube 4, which hinders the filling of explosive, and also allows the discharged gas to expand the soft bag 2 to provide support, achieving a linkage between the functions of "gas flow" and "support and reinforcement".

[0028] In summary, the structure and composition of the pre-charge-free detonator is not a simple assembly of isolated components. Instead, it forms an organic whole through the detonation bearing of the through pipe 4, the flow guidance and positioning of the tray 3, the support and reinforcement of the soft bag 2, and the gas guidance of the hose 1. This achieves the core objectives of "lowering without pre-charge, simultaneous support during detonation, and continuous and reliable detonation path," thus meeting the high efficiency and safety requirements of on-site mixed explosive blasting operations.

[0029] The working principle of the pre-load-free explosive-transmitting spacer revolves around "lowering without pre-loading, simultaneous loading and support reinforcement, and continuous and reliable explosive transmission path". Relying on the synergistic effect of the through pipe 4, tray 3, soft bag 2, and hose 1, it completes the entire process from spacer positioning to explosive filling, and then to support reinforcement and explosive transmission guarantee in stages, adapting to the blasting operation needs of mixed explosives on site.

[0030] The first stage is the lowering and initial positioning of the spacer. During construction, there is no need to pre-load the spacer with explosives. The entire structure, consisting of the through pipe 4, tray 3, soft bag 2, and flexible hose 1, can be directly lowered into the designated location within the borehole 5 where spacers need to be installed. During this process, because the tray 3 is funnel-shaped with its larger end fitting snugly against the inner wall of the borehole 5, once the spacer is lowered to the target position, the larger end of the tray 3 can form a tight contact with the inner wall of the borehole 5. This achieves initial lateral positioning of the spacer within the borehole 5, preventing displacement before subsequent explosive filling and laying a stable foundation for the subsequent explosive loading process. It also avoids the cumbersome operation of "pre-loading explosives at the borehole opening and then lowering" in traditional techniques, directly simplifying the construction process.

[0031] Next, the explosive filling and gas flow initiation phase begins. After the spacer is positioned, explosive 6 is filled into borehole 5 according to the normal on-site explosive mixing procedure. Since the smaller end of tray 3 is connected to the unsealed end of pipe 4 and the two are completely interconnected, the explosive 6, under the action of gravity and the conveying pressure of the mixing equipment, will naturally converge along the inclined inner wall of the funnel-shaped tray 3 and flow smoothly into the hollow cavity of pipe 4. As explosive 6 continues to fill, the air originally retained in pipe 4 will be gradually compressed by explosive 6. At this time, the flow channel formed by the through hole on the side wall of the sealed end of pipe 4 and hose 1 begins to play its role—the compressed gas enters hose 1 through the through hole and flows along hose 1 to the sealed cavity inside the soft bag 2 connected to it, realizing the linkage effect of "explosive filling driving gas flow", which not only avoids gas stagnation in pipe 4, but also provides power for the expansion of soft bag 2.

[0032] The next stage is the expansion of the soft bag and the formation of double support. As gas is continuously introduced into the sealed cavity of the soft bag 2 through the hose 1, the soft bag 2 gradually expands until its outer wall is tightly fitted to the inner wall of the borehole 5. According to the technical design, the outer diameter of the expanded soft bag 2 is not less than 1.2 times the diameter of the borehole 5. This dimensional characteristic ensures that the soft bag 2 can exert sufficient compressive force on the inner wall of the borehole 5, thereby strengthening the support from two dimensions: on the one hand, the expanded soft bag 2, wrapped around the outer wall of the connection between the pipe 4 and the tray 3, can form a stable vertical support for the tray 3 from below, offsetting the pressure of the upper explosive 6; on the other hand, the tight fit between the soft bag 2 and the inner wall of the borehole 5 further fixes the overall position of the spacer, forming a "lateral + vertical" double support system with the initial lateral positioning of the tray 3, completely avoiding the problem of the upper explosive 6 shifting or unevenly stacking due to insufficient support, and ensuring the stability of the charge structure.

[0033] Finally, there is the stage of ensuring the detonation path. As the explosive 6 continues to fill into the tube 4, because the gas in the tube 4 has been completely introduced into the soft bag 2 through the hose 1, there is no gas stagnation that hinders the filling of the explosive. The explosive 6 can smoothly fill the hollow cavity of the tube 4 and the internal channel of the tray 3, forming a continuous and dense explosive column. At this time, the tube 4 filled with explosive 6 becomes a complete detonation path. When the blasting operation is started, the detonation wave can be transmitted unimpeded along the explosive column in the tube 4. There will be no interruption of detonation due to the explosive not being densely filled in the spacer. Ultimately, this ensures the continuity and reliability of the detonation of the entire blasting network, achieving the dual goals of "interval charging" and "stable detonation".

[0034] Example 1 This embodiment proposes a pre-charge-free detonator spacer, such as... Figure 1 and Figure 2 As shown, it includes a tube 4, one end of which is connected to the soft bag 2 and the tray 3, and the other end of which is connected to the soft bag 2 through a hose 1.

[0035] Example 2 This embodiment proposes a pre-charge-free detonator spacer, such as... Figure 1 and Figure 2 As shown, it includes a tube 4, one end of which is connected to the soft bag 2 and the tray 3, and the other end of which is connected to the soft bag 2 via a flexible tube 1. The tube 4 has a hollow tubular structure, with one end of the tube 4 closed and the other end connected to the tray 3.

[0036] Example 3 This embodiment proposes a pre-charge-free detonator spacer, such as... Figure 1 and Figure 2As shown, it includes a tube 4, one end of which is connected to the soft bag 2 and the tray 3, and the other end of which is connected to the soft bag 2 via a flexible tube 1. The tube 4 has a hollow tubular structure, with one end closed and the other end connected to the tray 3. A through hole is provided on the side wall of the closed end of the tube 4.

[0037] Example 4 This embodiment proposes a pre-charge-free detonator spacer, such as... Figure 1 and Figure 2 As shown, it includes a tube 4, one end of which is connected to a soft bag 2 and a tray 3, and the other end of which is connected to the soft bag 2 via a flexible tube 1. The tube 4 has a hollow tubular structure, with one end closed and the other end connected to the tray 3. A through hole is provided on the side wall of the closed end of the tube 4. The soft bag 2 is fitted over the outer wall of the end of the tube 4 connected to the tray 3. The soft bag 2 has a ring-shaped structure and a sealed cavity inside.

[0038] Example 5 This embodiment proposes a pre-charge-free detonator spacer, such as... Figure 1 and Figure 2 As shown, the system includes a tube 4, one end of which is connected to a soft bag 2 and a tray 3, and the other end of which is connected to the soft bag 2 via a flexible tube 1. The tube 4 is a hollow tube, with one end closed and the other end connected to the tray 3. A through hole is provided on the side wall of the closed end of the tube 4. The soft bag 2 is fitted over the outer wall of the end of the tube 4 connected to the tray 3. The soft bag 2 is annular in shape and has a sealed cavity inside. One end of the flexible tube 1 is connected to the inside of the closed end of the tube 4 through the through hole on the side wall of the tube 4, and the other end of the flexible tube 1 is connected to the sealed cavity inside the soft bag 2. The tray 3 is funnel-shaped, with the smaller end of the tray 3 connected to the unclosed end of the tube 4, and the tray 3 is connected to the inside of the tube 4.

[0039] Example 6 This embodiment proposes a pre-charge-free detonator spacer, such as... Figure 1 and Figure 2 As shown, the system includes a tube 4, one end of which is connected to a soft bag 2 and a tray 3, and the other end of which is connected to the soft bag 2 via a flexible tube 1. The tube 4 is a hollow tube, with one end closed and the other end connected to the tray 3. A through hole is provided on the side wall of the closed end of the tube 4. The soft bag 2 is fitted over the outer wall of the end of the tube 4 connected to the tray 3. The soft bag 2 is annular in shape and has a sealed cavity inside. One end of the flexible tube 1 is connected to the inside of the closed end of the tube 4 through the through hole on the side wall of the tube 4, and the other end of the flexible tube 1 is connected to the sealed cavity inside the soft bag 2. The tray 3 is funnel-shaped, with the smaller end of the tray 3 connected to the unclosed end of the tube 4, and the tray 3 is connected to the inside of the tube 4.

[0040] When the connecting pipe 4, tray 3, soft bag 2, and hose 1 are located inside the borehole 5, the outer wall of the larger end of the tray 3 is fitted against the inner wall of the borehole 5. The borehole 5 is filled with explosive 6, which enters the connecting pipe 4 through the tray 3, causing the soft bag 2 to be inflated and its outer wall to fit against the inner wall of the borehole 5. When the soft bag 2 is inflated, its outer diameter is 1.2 times the diameter of the borehole 5.

[0041] The pre-load-free detonating spacer, through the coordinated structural design of the through pipe 4, tray 3, hose 1, and soft bag 2, fundamentally eliminates the cumbersome step of "pre-loading explosives into the spacer at the borehole opening" found in existing technologies. Its core advantage lies in the elimination of the need for separate pre-loading of explosives into the spacer. During construction, the empty spacer, including the through pipe 4, soft bag 2, tray 3, and hose 1, can be directly lowered into the designated space within the borehole 5. Subsequently, only the on-site mixing of explosives 6 needs to be performed according to the normal procedure. During this process, the funnel-shaped tray 3 can guide the explosive 6 to flow smoothly into the hollow cavity of the through pipe 4 without the need for additional orifice loading operations on the spacer. This design not only reduces construction steps and significantly shortens the single-hole operation time, but is also particularly suitable for the efficiency requirements of large-scale blasting operations. At the same time, it avoids problems such as explosive leakage and incomplete filling caused by narrow operating space, changes in on-site dust and humidity, etc., when using traditional orifice loading. This reduces explosive waste and pollution, lowers the safety hazards caused by temporary exposure of explosives at the orifice, and makes the construction process more in line with the core requirements of "high efficiency and safety" in industrial blasting.

[0042] This spacer, through the structural cooperation between the tray 3 and the soft bag 2, forms a dual support system of "initial positioning + expansion reinforcement," effectively solving the problem of insufficient support in traditional spacers. When the spacer is placed into the borehole 5, the outer wall of the larger end of the tray 3 can directly and tightly fit against the inner wall of the borehole 5, achieving initial positioning and lateral fixation of the spacer within the borehole. As the explosive 6 is injected into the through pipe 4, the gas originally stored in the pipe is compressed by the explosive and enters the flexible hose 1 through the through hole on the side wall of the sealed end of the through pipe 4. Then, the flexible hose 1 guides the gas into the sealed cavity of the soft bag 2, causing the soft bag 2 to gradually expand. According to the technical design, the outer diameter of the expanded soft bag 2 is not less than 1.2 times the diameter of the borehole 5. This dimensional characteristic allows the expanded soft bag 2 to tightly press against the inner wall of the borehole 5. At the same time, the soft bag 2, wrapped around the outer wall of the connection end between the through pipe 4 and the tray 3, can provide stable vertical support to the tray 3 from below. This double-support structure completely avoids the problems of upper explosive displacement and uneven accumulation, ensuring that the entire charge structure remains stable within the borehole 5, and providing structural protection for the uniform transmission of blasting energy.

[0043] Traditional spacers often suffer from residual gas buildup, which can obstruct explosive filling and lead to explosive gaps within the spacer, potentially causing detonation interruptions. This solution, however, perfectly addresses this issue by creating a gas flow channel through the through-pipe 4, hose 1, and soft bag 2. The through-hole at the closed end of the through-pipe 4 serves as a gas outlet, forming a complete exhaust path with the sealed cavity of hose 1 and soft bag 2. When the explosive 6 enters the through-pipe 4 through the tray 3, the gas inside is continuously compressed and channeled entirely into the soft bag 2 through the through-hole and hose 1, preventing gas stagnation within the through-pipe 4. This design ensures that the explosive 6 can smoothly fill the hollow cavity of the tube 4 and the channel of the tray 3, without any gaps where the explosive is not filled, thus achieving complete compaction of the explosive within the spacer. At the same time, the tube 4, filled with explosive, serves as a continuous detonation transmission channel, ensuring that the detonation wave can be transmitted without obstruction within the spacer, without interruption of detonation transmission due to insufficient explosive compaction. Ultimately, this ensures the reliability of detonation transmission in the entire blasting network and avoids poor blasting results or potential safety hazards caused by detonation transmission problems in the spacer.

Claims

1. A pre-charge-free detonator spacer, characterized in that, Includes a tube (4), one end of which is connected to the soft bag (2) and the tray (3), and the other end of which is connected to the soft bag (2) through a hose (1).

2. The pre-charge-free detonator spacer according to claim 1, characterized in that, The tube (4) has a hollow tube structure. One end of the tube (4) is closed, and the other end of the tube (4) is connected to the tray (3).

3. The pre-charge-free detonator spacer according to claim 2, characterized in that, The pipe (4) has a through hole on the side wall of one end.

4. The pre-charge-free detonator spacer according to claim 3, characterized in that, The soft bag (2) is wrapped around the outer wall of the end where the tube (4) connects to the tray (3).

5. The pre-charge-free detonator spacer according to claim 4, characterized in that, The soft bag (2) has a circular structure and a sealed cavity inside.

6. The pre-charge-free detonator spacer according to claim 5, characterized in that, One end of the hose (1) is connected to the inside of the closed end of the tube (4) through a through hole on the side wall of the tube (4), and the other end of the hose (1) is connected to the sealed cavity inside the soft bag (2).

7. The pre-charge-free detonator spacer according to claim 6, characterized in that, The tray (3) has a funnel-shaped structure. The smaller end of the tray (3) is connected to the unsealed end of the tube (4). The tray (3) and the tube (4) are internally connected.

8. The pre-charge-free detonator spacer according to claim 7, characterized in that, When the tube (4), tray (3), soft bag (2), and hose (1) are located inside the borehole (5), the outer wall of the larger end of the tray (3) is fitted to the inner wall of the borehole (5).

9. The pre-charge-free detonator spacer according to claim 8, characterized in that, The borehole (5) is filled with explosives (6), which enter the tube (4) through the tray (3) so that the soft bag (2) is in an inflated state and the outer wall of the soft bag (2) is in contact with the inner wall of the borehole (5).

10. The pre-charge-free detonator spacer according to claim 9, characterized in that, When the soft bag (2) is in an inflated state, the outer diameter is not less than 1.2 times the diameter of the borehole (5).

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