A hole-in-hole segmented charge weight adjustable charging device and method

Abstract

This invention relates to the field of explosive loading device technology, specifically to an adjustable explosive loading device and method with segmented charge quantity within an orifice. The device includes a loading rack, which comprises a base plate and two side plates fixed to the base plate. Multiple explosive cartridges are arranged inside the loading rack, each containing a blasting charge. A storage rack is fixed to the bottom of each cartridge, and an air-isolating bag is fixed inside the storage rack. The air-isolating bag, when unfolded, fills the gap between two cartridges. Slider blocks are fixed to both sides of each cartridge, and these sliders are slidably connected to the side plates of the loading rack. The beneficial effect is that, through the pre-reserved slots on the side plates of the loading rack and their cooperation with the sliders, each cartridge can be independently adjusted up and down along the side plates of the loading rack, and its position is locked by inserting a hand-tightened screw into a positioning hole. This allows the spacing between adjacent charge quantities to be flexibly adjusted according to the blasting design and prevents displacement during transport and deployment, solving the problem of fixed and unadjustable segmented positions in existing technologies.

Description

Technical Field

[0001] This invention relates to the field of drug loading device technology, specifically to a drug loading device and method with adjustable drug quantity in segments within a hole. Background Technology

[0002] In open-pit deep-hole bench blasting and underground tunnel blasting, in-hole segmented charging technology has been widely used. Its core idea is to distribute explosive charges at different depths within the same borehole, using electronic detonators for precise, delayed detonation, allowing the blasting energy to be released in stages along the borehole depth, thereby reducing single-stage peak pressure, improving rock fragmentation, and minimizing flyrock hazards. However, existing in-hole segmented charging devices generally suffer from the following problems: First, the positions of the segmented explosive charges are fixed and cannot be adjusted. In traditional explosive charging structures, the positions of each explosive charge segment inside the charging tube are fixed by sealing materials (such as clay or stemming clay). Once the sealing is completed, it cannot be changed. If the blasting plan requires adjustments to the spacing or amount of explosives in each segment, the explosives must be reloaded, resulting in extremely poor flexibility.

[0003] Second, there is a lack of reliable spacing measures between the different sections of the explosive charges. Although some devices use air gaps, they lack dedicated isolation structures, and the explosive charges are simply stacked naturally by gravity. During deployment, vibrations can easily cause the explosive charges to shift and the spacing to change, making it difficult to guarantee the timing accuracy of the segmented detonation. Other devices use water gaps or sand gaps, which can fix the position, but the construction and operation are complex and costly, and water gaps are difficult to maintain in dry boreholes.

[0004] Third, there is a lack of overall securing methods when transporting multiple stacked drug packages. When multiple independent drug-loading units need to be stacked and transported, existing devices usually require tightening screws or using binding methods to secure them one by one. This is cumbersome and inefficient. Furthermore, during the handling and delivery process, the drug packages may still experience relative displacement due to bumps, causing the actual spacing to deviate from the design value.

[0005] Fourth, the axial sealing of the medicine pack and the storage of the isolation bag lack an integrated design. In the existing technology, the top sealing of the medicine pack and the inter-segment isolation are usually two independent structures, resulting in many parts of the device, complicated on-site operation procedures, and the isolation materials (such as airbags and isolation bags) lack a stable storage position when not in use, making them easy to be scattered and lost.

[0006] Therefore, there is an urgent need for an in-hole segmented adjustable drug loading device and method that features a simple structure, independently adjustable drug quantity position for each segment, reliable inter-segment isolation, convenient multi-segment stacking and transportation, and integrated storage and use of isolation materials. Summary of the Invention

[0007] The purpose of this invention is to provide a device and method for adjusting the amount of drug in segments within a hole, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an in-hole segmented charge device with adjustable charge quantity, comprising a charge rack, the charge rack including a base plate and two side plates fixed on the base plate, the inner side of the charge rack being provided with multiple charge cylinders, the inside of the charge cylinders containing explosive charges, a storage rack fixed to the bottom of the charge cylinders, an air isolation bag fixed inside the storage rack, the air isolation bag being expanded to fill the gap between two charge cylinders, and sliders fixed to both sides of the charge cylinders, the sliders being slidably connected to the side plates of the charge rack.

[0009] Preferably, the side plate of the medicine loading rack is provided with a reserved groove, the slider is slidably connected in the reserved groove, and the slider is fixed with connecting pieces on both sides at the end away from the medicine loading cylinder. A hand screw is screwed onto the surface of the connecting piece, and the hand screw passes through the connecting piece and is inserted into the positioning hole opened in the side plate of the medicine loading rack.

[0010] Preferably, the top surface of the reserved groove is provided with a hanging groove, which is U-shaped.

[0011] Preferably, a pressure ring is fitted on the top of the drug loading rack, and two through holes are opened on the surface of the pressure ring. The two side plates of the drug loading rack pass through the two through holes respectively. A second hand screw is screwed onto the outer ring surface of the pressure ring. The second hand screw is inserted into the positioning hole. After multiple drug loading cylinders are stacked, the pressure ring presses on the top drug loading cylinder.

[0012] Preferably, the top of the drug-filling cartridge has an outer ring groove on its outer ring surface, and the side wall of the outer ring groove has a locking groove. The bottom end of the air isolation bag is fixed with a rubber cover. After the air isolation bag is unfolded, the rubber cover is fitted into the outer ring groove at the top of the drug-filling cartridge below, and the bottom end of the rubber cover is fixed with an elastic rubber ring, which is fitted into the outer ring groove.

[0013] Preferably, the limiting ring is an inverted "convex" shaped round tube, and the bottom end of the limiting ring has a second groove on the outer ring surface. The second groove is an annular groove. After the air isolation bag is inserted into the storage rack, the rubber cover is turned upward and outward and then fitted into the second groove by an elastic rubber ring.

[0014] Preferably, a one-way air injection valve is installed at the bottom of the air isolation bag.

[0015] A method for adjusting the amount of explosive in a segmented manner within a borehole, the method comprising the following steps: When placing explosive charges into the charging cartridges, and multiple charging cartridges need to be stacked together, after stacking multiple charging cartridges, pull down the pressure ring to press it on the top charging cartridge. Then, use the second hand screw to fix the pressure ring to the side plate of the charging rack to prevent multiple charging cartridges from shaking. There is no need to fix the charging cartridges separately with the first hand screw. When it is necessary to place an air isolation bag between two adjacent charge tubes, after adjusting the distance between the two adjacent charge tubes, the charge tubes are limited by hand-tightening screws. Then, the air isolation bag is pulled out from the storage rack and air is injected into the air isolation bag through the one-way air injection valve. When the charge rack is placed into the blast hole, the air isolation bag fills the gap between the two adjacent charge tubes. After threading the hoisting rope through the hanging slots on the two side plates of the charge rack, lower the charge rack and hoisting rope into the blast hole, and slowly lower the charge rack downwards.

[0016] Compared with the prior art, the beneficial effects of the present invention are: The present invention proposes an adjustable charge loading device and method for segmented charges within the borehole. Through the cooperation of a pre-reserved groove on the side plate of the charge rack and a slider, each charge cartridge can be independently adjusted up and down along the side plate of the charge rack. The position is locked by inserting a hand-tightened screw into a positioning hole. This allows the spacing between adjacent charge segments to be flexibly adjusted according to the blasting design and prevents displacement during handling and deployment, solving the problem of fixed and unadjustable segment positions in existing technologies. By using a pressure ring fitted on the top of the charge rack and locked with a hand-tightened screw, a uniform downward pressure is applied to the stacked charge cartridges, ensuring the entire set of charge packages fits tightly together. This eliminates the need for individual fixing during handling, significantly simplifying the operation process and effectively preventing segment misalignment caused by bumps. Furthermore, the air isolation bag pre-placed in the charge cartridge storage rack at the bottom, in conjunction with a rubber cover, elastic rubber ring, and the outer ring groove at the top of the charge cartridge, and... The double-insertion locking structure of slot one securely embeds itself between adjacent charge cartridges to form an air gap layer when deployed. Utilizing the compressibility of air, it reduces the peak pressure of the blast shock wave and prolongs the stress duration, improving rock breaking performance. In the retracted state, the rubber cover is folded outwards and secured to slot two at the bottom of the limiting ring via an elastic rubber ring, achieving integrated and secure attachment of the isolation bag and charge cartridge, preventing scattering and facilitating retrieval. Furthermore, the limiting ring uses an inverted "convex" shaped tube with an annular slot two at the bottom. After being screwed into the top of the charge cartridge, it forms an axial seal, preventing the charge cartridge from jumping out during transport and deployment. The threaded connection facilitates quick assembly and disassembly. The "U"-shaped hanging groove on the top of the charge rack's side plate provides a stable, anti-slip attachment point for the hoisting rope, ensuring the stability of the charge rack during hoisting and deployment. In summary, this invention achieves precise adjustment of the position of segmented explosive charges, reliable deployment of inter-segment air isolation, rapid fixing of multi-segment stacking and transportation, and integrated storage and use of isolation materials, effectively improving the energy distribution accuracy and construction efficiency of segmented blasting in boreholes. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Sectional view of the structure at point A in the middle; Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point B; Figure 4 for Figure 2 Enlarged schematic diagram of the structure at point C; Figure 5 This is a schematic diagram of the pressure ring structure of the present invention; Figure 6 This is a schematic diagram of the charge cartridge structure of the present invention; Figure 7 This is a schematic diagram of the drug loading rack structure of the present invention.

[0018] In the diagram: 1. Charge rack, 101. Reservation slot, 102. Hanging slot, 103. Positioning hole, 103. Charge cartridge, 2. Slider, 201. Connecting piece, 202. Hand screw 1, 203. Limiting ring, 204. Outer ring groove, 205. Slot 1, 206. Explosive charge, 3. Storage rack, 4. Slot 2, 401. Air isolation bag, 5. Rubber cover, 501. Elastic rubber ring, 502. One-way gas injection valve, 503. Pressure ring, 6. Hand screw 2, 601. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1 to 7This invention provides a technical solution: an adjustable-volume, segmented drug loading device for holes, comprising a loading rack 1. The loading rack 1 includes a base plate and two side plates fixed to the base plate, forming an installation space between the two side plates for accommodating multiple drug cartridges 2. A pre-reserved groove 101 is provided on the side plate of the loading rack 1, and a slider 201 is slidably connected in the pre-reserved groove 101. By sliding the slider 201 up and down within the pre-reserved groove 101, the position of the drug cartridges 2 relative to the loading rack 1 can be adjusted, thereby achieving flexible adjustment of the spacing between adjacent drug cartridges 2 to meet the differentiated requirements of drug pack spacing for different hole depths and different segmentation schemes. Connecting pieces 202 are fixed on both sides of the slider 201 at the end furthest from the drug cartridge 2. A hand-tightening screw 203 is screwed onto the surface of the connecting piece 202, and the hand-tightening screw 203 passes through the connecting piece 202 and is inserted into the positioning hole 103 provided in the side plate of the loading rack 1. After the position of the charging cylinder 2 is adjusted to the required spacing, tighten the hand screw 203 so that its end is inserted into the positioning hole 103. This will lock the slider 201 and the charging cylinder 2 in the current position, preventing spacing deviation due to vibration during handling and delivery, and ensuring the positional accuracy of each section of medicine. The top surface of the reserved slot 101 on the side plate of the charging rack 1 is provided with a hanging slot 102. The hanging slot 102 is U-shaped, and the lifting rope can pass through the hanging slot 102 and hang on the charging rack 1 to achieve stable lifting of the charging rack 1. The U-shaped structure can also prevent the lifting rope from slipping during delivery.

[0021] The explosive charge 3 is contained inside the cartridge 2. A limiting ring 204 is screwed into the top of the cartridge 2. The limiting ring 204 is an inverted "U"-shaped cylindrical tube, and its bottom end has a second groove 401 on its outer ring surface. The second groove 401 is an annular groove. After the limiting ring 204 is screwed into the top of the cartridge 2, its bottom annular groove 401 engages downwards on the outer ring surface of the cartridge 2, forming an axial seal on the explosive charge 3. This effectively prevents the explosive charge 3 from jumping out of the top during the handling and deployment of the cartridge 2. At the same time, the threaded connection of the limiting ring 204 facilitates quick assembly and disassembly, improving the loading efficiency. The top of the cartridge 2 has an outer ring groove 205 on its outer ring surface. The side wall of the outer ring groove 205 has a first groove 206. The outer ring groove 205 and the first groove 206 together constitute the insertion and positioning structure at the bottom of the air isolation bag 5.

[0022] A storage rack 4 is fixed to the bottom of the charge cartridge 2, and an air isolation bag 5 is fixed inside the storage rack 4. A one-way air injection valve 503 is installed at the bottom of the air isolation bag 5. After unfolding, the air isolation bag 5 fills the gap between the two charge cartridges 2, forming an air gap layer. It utilizes the compressibility of air to reduce the peak pressure of the blast shock wave, while prolonging the stress action time and improving the rock breaking effect. A rubber cover 501 is fixed to the bottom end of the air isolation bag 5, and an elastic rubber ring 502 is fixed to the bottom end of the rubber cover 501. When the air isolation bag 5 is unfolded for use, the rubber cover 501 is fitted into the outer ring groove 205 at the top of the adjacent charge cartridge 2 below. The elastic rubber ring 502 is constrained by the outer ring groove 205 and generates an elastic clamping force, so that the rubber cover 501 is firmly embedded in the outer ring groove 205. At the same time, the outer wall of the rubber cover 501 engages with the slot 206, achieving double fixation between the air isolation bag 5 and the charge cartridge 2 below, preventing the isolation bag from falling off during deployment. When the air isolation bag 5 is not in use, it is put into the storage rack 4 for storage. At this time, the rubber cover 501 is flipped up and outward, and the elastic rubber ring 502 is fitted into the slot 401 at the bottom of the limiting ring 204 under the action of elastic restoring force. The limiting ring 204 is used to firmly hold the air isolation bag 5 in the storage state, so as to prevent the isolation bag from being scattered when storing and to facilitate the next use.

[0023] Both sides of the drug cartridge 2 are fixed with sliders 201, which are slidably connected to the side plates of the drug rack 1, allowing each drug cartridge 2 to be independently slid up and down along the side plates of the drug rack 1 to adjust its position, thus achieving independent spacing control of multiple drug dosages. A pressure ring 6 is fitted onto the top of the drug rack 1. Two through-holes are formed on the surface of the pressure ring 6, and the two side plates of the drug rack 1 pass through these two through-holes, allowing the pressure ring 6 to slide up and down along the side plates. A second hand-tightening screw 601 is screwed onto the outer ring surface of the pressure ring 6, and the second hand-tightening screw 601 is inserted into the positioning hole 103. When multiple cartridges 2 are stacked together, pull down the pressure ring 6 to press it on top of the uppermost cartridge 2. Then tighten the hand screw 601 to fix the pressure ring 6 to the side plate of the cartridge rack 1. The pressure ring 6 applies a uniform downward pressure to the entire stack of cartridges 2, making each cartridge 2 fit tightly together. During handling and delivery, it is not necessary to fix each cartridge 2 individually with the hand screw 203, which greatly simplifies the operation process. At the same time, it effectively prevents the relative displacement of multiple cartridges 2 during bumps and ensures the relative position stability of each section of the drug.

[0024] Based on the above-mentioned charging device, the present invention also provides a method for charging explosives with adjustable segmented amounts within the borehole, comprising the following steps: First, the explosive charges are loaded and stacked securely. Explosive charges 3 are placed one by one into each charge cartridge 2. Then, the limiting ring 204 is screwed into the top of the charge cartridge 2, and the locking groove 401 is used to seal the charges and prevent them from jumping out. When multiple charge cartridges 2 need to be stacked for transport, they are stacked in sequence, and the pressure ring 6 is pulled down to press down on the top charge cartridge 2. The hand screw 601 is then tightened to lock the pressure ring 6, thus compressing the entire charge cartridge 2 into one unit. During transport, individual fixing is not required, avoiding misalignment of the explosive charge due to bumps.

[0025] Next, the segment spacing is adjusted and the air isolation bags are deployed. Based on the charge and spacing requirements of each segment in the blasting design, the sliders 201 on both sides of each charge cartridge 2 are slid up and down along the reserved groove 101 to adjust the spacing between adjacent charge cartridges 2 to the design value. Then, the corresponding hand-tightening screws 203 are tightened to insert them into the positioning holes 103, locking the charge cartridge 2 in its current position. After the spacing adjustment is completed, the air isolation bags 5 are pulled out of the storage rack 4. Air is injected into the air isolation bags 5 through the one-way air injection valve 503 to expand them. The expanded air isolation bags 5 fill the gaps between adjacent charge cartridges 2, so that the rubber cover 501 is fitted into the outer ring groove 205 at the top of the lower charge cartridge 2. The elastic rubber ring 502 is embedded in the outer ring groove 205 to clamp and fix it. At the same time, the outer wall of the rubber cover 501 is engaged with the slot 206, achieving reliable positioning of the isolation bags. After the air isolation bag 5 is filled, it forms an air gap layer between adjacent explosive charges, which effectively reduces the peak blasting pressure, prolongs the stress action time, and improves the blasting fragmentation quality.

[0026] Finally, the hoisting and deployment are carried out. The hoisting rope is threaded through the "U"-shaped hanging slots 102 on the two side plates of the charge rack 1, ensuring the rope is securely attached to the charge rack 1. The charge rack 1, along with the hoisting rope, is then lowered into the blast hole, slowly descending to the designed hole depth. After deployment, each section of the explosive charge 3 is detonated sequentially. The air isolation bags 5 between adjacent charges are rapidly compressed by the initial blast impact and then expand again, providing a dual control of buffering and pressurizing for the detonation of subsequent charges, achieving precise segmented detonation and optimized energy distribution.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hole-in-hole segmented powder charge device with adjustable powder charge, comprising a charge frame (1), the charge frame (1) comprising a bottom plate and two side plates fixed on the bottom plate, characterized in that: The inner side of the charging rack (1) is provided with multiple charging cylinders (2). The charging cylinders (2) are filled with explosive charges (3). A storage rack (4) is fixed at the bottom of the charging cylinders (2). An air isolation bag (5) is fixed inside the storage rack (4). After the air isolation bag (5) is unfolded, it fills the gap between the two charging cylinders (2). A slider (201) is fixed on both sides of the charging cylinders (2). The slider (201) is slidably connected to the side plate of the charging rack (1).

2. The segmented charge device of claim 1, wherein: The side plate of the medicine rack (1) is provided with a reserved groove (101). The slider (201) is slidably connected in the reserved groove (101). The slider (201) has connecting pieces (202) fixed on both sides of the end away from the medicine cylinder (2). The surface of the connecting piece (202) is screwed with a hand screw (203). The hand screw (203) passes through the connecting piece (202) and is inserted into the positioning hole (103) opened in the side plate of the medicine rack (1).

3. The segmented charge device of claim 2, wherein: The top surface of the reserved slot (101) is provided with a hanging slot (102), which is in the shape of a "U".

4. The segmented charge device of claim 2, wherein: The top of the medicine rack (1) is fitted with a pressure ring (6). The surface of the pressure ring (6) has two through holes. The two side plates of the medicine rack (1) pass through the two through holes respectively. The outer ring surface of the pressure ring (6) is screwed with a second hand screw (601). The second hand screw (601) is inserted into the positioning hole (103). After multiple medicine cylinders (2) are stacked, the pressure ring (6) presses on the top medicine cylinder (2).

5. The segmented charge device of claim 1, wherein: The top of the drug-filling cylinder (2) has an outer ring groove (205) on its outer ring surface. The side wall of the outer ring groove (205) has a slot (206). The bottom end of the air isolation bag (5) is fixed with a rubber cover (501). After the air isolation bag (5) is unfolded, the rubber cover (501) is fitted into the outer ring groove (205) at the top of the drug-filling cylinder (2) below. The bottom end of the rubber cover (501) is fixed with an elastic rubber ring (502), which is fitted into the outer ring groove (205).

6. The segmented charge device of claim 1, wherein: The limiting ring (204) is an inverted "convex" shaped round tube. The bottom end of the limiting ring (204) has a second groove (401) on the outer ring surface. The second groove (401) is an annular groove. After the air isolation bag (5) is inserted into the storage rack (4) for storage, the rubber cover (501) is turned upward and outward and then fitted into the second groove (401) by the elastic rubber ring (502).

7. The segmented charge device of claim 1, wherein: The bottom of the air isolation bag (5) is equipped with a one-way air injection valve (503).

8. A method for adjusting the amount of explosive in segments within a borehole, using the adjustable explosive in segments device described in any one of claims 1-7, characterized in that: The method includes the following steps: When the explosive charge (3) is placed into the charging tube (2), and multiple charging tubes (2) need to be stacked together, after the multiple charging tubes (2) are stacked, the pressure ring (6) is pulled down and pressed on the top charging tube (2). Then, the pressure ring (6) is fixed to the side plate of the charging rack (1) by the second hand screw (601) to avoid the multiple charging tubes (2) from shaking. There is no need to fix the charging tube (2) separately by the first hand screw (203). When it is necessary to place an air isolation bag (5) between two adjacent charge tubes (2), after adjusting the distance between the two adjacent charge tubes (2), the charge tubes (2) are limited by the hand-tightening screw (203). Then the air isolation bag (5) is pulled out from the storage rack (4) and air is injected into the air isolation bag (5) through the one-way air injection valve (503). When the charge rack (1) is placed into the blast hole, the air isolation bag (5) fills the gap between the two adjacent charge tubes (2). After passing the hoisting rope through the hanging slots (102) on the two side plates of the charge rack (1), the charge rack (1) and the hoisting rope are lowered into the blast hole, and the charge rack (1) is slowly lowered downwards.

Images