Fastening device for a booster interval

Abstract

The utility model discloses a fixing device for transmissible interval device, including the through connector who is connected with interval device lower end charge pipe, the other end of through connector still has the hard pipe of bushing, interval device lower end charge pipe is covered on the upper end of through connector and interval device lower end charge pipe end portion and through connector between still are provided with flexible film, and flexible film will interval device lower end charge pipe bottom close, and the pipe wall of hard pipe is provided with a plurality of through -holes, and the lateral wall of hard pipe lower end side still is fixed with annular flexible bag, and the through -hole of hard pipe all is located in flexible bag. The utility model has solved the problem of the fixing effect of interval device is not good in the case that there is no water in blast hole in prior art.

Description

Technical Field

[0001] This utility model belongs to the technical field of mining blasting devices, and relates to a fixing device for a detonator spacer. Background Technology

[0002] At mine blasting sites, geological conditions and weather can cause water to enter the blast holes. The presence or absence of water in the holes can affect the placement and fixation of spacers. When there is water in the blast hole, the water and the spacer together support the explosive above the spacer, resulting in better fixation. When there is no water in the blast hole, the emulsion explosive is viscous and flowable, leading to poor fixation of the spacer. Furthermore, when the spacer is subjected to pressure from the upper explosive, its bottom may insert into the explosive, causing the spacer height to fall short of expectations. Utility Model Content

[0003] The purpose of this invention is to provide a fixing device for a detonator-transmitting spacer, which solves the problem in the prior art that the spacer is not fixed well when there is no water in the borehole because the emulsion explosive is viscous and flowable.

[0004] The technical solution adopted in this utility model is a fixing device for a detonator, including a straight connector connected to the lower end of the detonator's charging tube, and a rigid tube sleeved on the other end of the straight connector. The lower end of the detonator's charging tube is sleeved inside the upper end of the straight connector, and a flexible film is provided between the end of the lower end of the detonator's charging tube and the straight connector. The flexible film seals the bottom of the lower end of the detonator's charging tube. Several through holes are provided on the wall of the rigid tube, and an annular flexible bag is fixed on the lower end side wall of the rigid tube. All the through holes of the rigid tube are located inside the flexible bag.

[0005] Furthermore, the connection between the flexible bag and the lower end of the rigid tube is a sealed connection.

[0006] Furthermore, the outer diameter of the lower end of the spacer's charging tube is the same as the inner diameter of the upper end of the straight connector. An annular step is provided in the middle of the inside of the straight connector. After the lower end of the spacer's charging tube is installed on the upper end of the straight connector, the lower end of the lower end of the spacer's charging tube is located on the step.

[0007] Furthermore, the diameter of the flexible film is larger than the outer diameter of the drug loading tube at the lower end of the spacer. After the drug loading tube at the lower end of the spacer and the straight connector are installed and connected, the flexible film is clamped and fixed at the step by the drug loading tube at the lower end of the spacer and the straight connector.

[0008] Furthermore, the diameter of the flexible bag after it is opened is larger than the diameter of the borehole.

[0009] Furthermore, the outer diameter of the upper end of the rigid tube is adapted to the inner diameter of the lower end of the straight connector, and the upper end of the rigid tube extends into the lower end of the straight connector.

[0010] Furthermore, the flexible film is made of low-density polyethylene (LDPE), polypropylene (PP), or polyurethane (PU) film; the thickness of the flexible film is 0.1-0.3mm, which ensures both sealing performance and clamping flexibility, and can be stably fixed by the steps of the lower end of the spacer's drug loading tube and the straight connector.

[0011] Furthermore, the flexible bag is made of high-strength nylon cloth (nylon 66), polyester fiber (polyester) cloth, or butyl rubber coated canvas; the thickness of the flexible bag is 0.3-0.8mm, and after being filled with explosives and opened, it can adhere tightly to the inner wall of the borehole by virtue of the tensile strength of the material, so as to achieve stable fixation of the spacer.

[0012] Furthermore, the flexible bag and the rigid tube are fixed in any of the following ways: a) High-strength industrial bonding: Use epoxy resin structural adhesive or polyurethane high-strength adhesive to bond the annular edge of the flexible bag to the lower outer wall of the rigid tube. Before bonding, the outer wall of the rigid tube needs to be ground to a roughness of Ra1.6-Ra3.2. After bonding, cure at room temperature for 24 hours. b) Heat sealing / welding: If the flexible bag is made of coated plastic sheet or thermoplastic polyurethane (TPU) film, use a high-frequency heat sealing machine (heat sealing temperature 120-150℃, pressure 0.3-0.5MPa) to heat seal the edge of the flexible bag to the outer wall of the rigid tube; if the flexible bag is a multi-layer nylon cloth + hot melt adhesive composite structure, use a hot air welding machine (hot air temperature 200-250℃) to weld the edge of the flexible bag to the outer wall of the rigid tube. c) Mechanical fastening + sealing assistance: Process 2-3 annular grooves (groove depth 0.5-1mm, groove width adapted to the thickness of the flexible bag) on ​​the outer wall of the lower end of the rigid tube. After fitting the annular edge of the flexible bag into the groove, fasten it with stainless steel hose clamps (width 8-12mm). Fill the gap between the groove and the edge of the flexible bag with nitrile rubber sealant.

[0013] Another technical solution adopted in this invention is a fixing device for a detonator, including a straight connector connected to the lower end of the detonator's charging tube. The lower end of the detonator's charging tube is sleeved inside the upper end of the straight connector, and a sealing structure is provided inside the straight connector at the position of the lower end of the detonator's charging tube. When the lower end of the detonator's charging tube is sleeved inside the upper end of the straight connector, the sealing structure seals the lower end of the detonator's charging tube. Several through holes are provided on the lower end of the straight connector's tube wall, and an annular flexible bag is also fixed on the lower end of the straight connector's side wall, with all through holes located inside the flexible bag.

[0014] The connection between the flexible bag and the lower end of the straight connector is a sealed connection.

[0015] The diameter of the flexible bag after it is opened is larger than the diameter of the borehole.

[0016] The flexible bags are made of high-strength nylon fabric (nylon 66), polyester fiber (polyester) fabric or butyl rubber coated canvas; the thickness of the flexible bags is 0.3-0.8mm.

[0017] The beneficial effects of this utility model are: The present invention provides a fixing device for a detonating spacer, which installs a rigid tube and a flexible bag at the bottom of the spacer. When the spacer is subjected to pressure from the explosive at the top, the explosive at the bottom flows into the flexible bag through the small hole in the rigid tube. The flexible bag opens to fix the spacer, thus solving the problems of difficulty in fixing and maintaining the spacer height encountered when the spacer is used in a dry hole in the prior art. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of the fixing device for a detonator spacer according to this utility model; Figure 2 This is a structural diagram of the fixing device of the present invention for use in a detonator spacer.

[0019] In the diagram: 1. Drug loading tube at the lower end of the spacer, 2. Straight connector, 3. Rigid tube, 4. Flexible film, 5. Through hole, 6. Flexible bag. Detailed Implementation

[0020] The following detailed description is provided in conjunction with specific implementation methods.

[0021] Example 1 This utility model is a fixing device for a detonator-transmitting spacer, and its structure is as follows: Figure 1 As shown, it includes a straight connector 2 connected to the lower end of the spacer charging tube 1. The other end of the straight connector 2 is also fitted with a rigid tube 3. The lower end of the spacer charging tube 1 is fitted inside the upper end of the straight connector 2, and a flexible film 4 is also provided between the end of the lower end of the spacer charging tube 1 and the straight connector 2. The flexible film 4 seals the bottom of the lower end of the spacer charging tube 1. The rigid tube 3 has several through holes 5 on its tube wall for the explosive to pass through. An annular flexible bag 6 is also fixed on the lower end side wall of the rigid tube 3 to contain the explosive. The through holes 5 of the rigid tube 3 are all located inside the flexible bag 6.

[0022] Before being placed into the borehole, the flexible bag 6 is fixed to the rigid tube 3 without being opened. After being opened, the diameter of the flexible bag 6 is larger than the inner diameter of the borehole. The rigid tube 3 has several through holes 5 for the explosive to pass through.

[0023] like Figure 2As shown, when applying this embodiment to the placement of spacers into waterless boreholes, firstly, the flexible film 4 is placed on the upper end of the straight connector 2. The lower end of the spacer's charging tube 1 is then inserted from top to bottom into the upper end of the straight connector 2. The bottom of the lower end of the charging tube 1 is sealed with the flexible film 4. Then, the rigid tube 3 is connected to the straight connector 2. The lower end wall of the rigid tube 3 has several small holes. A flexible bag 6 is fixed to the outside of the rigid tube 3. The spacer with the fixing device is placed into the borehole. The explosive in the borehole will enter from the bottom of the rigid tube 3 and then flow into the flexible bag 6 through the through hole 5. After the flexible bag is filled, it opens and clamps the inner wall of the borehole to fix the spacer.

[0024] The upper end of the rigid tube 3 and the lower end of the straight connector 2 are in clearance fit (clearance ≤ 0.2mm). The rigid tube rests against the step inside the straight connector, and a large frictional force is generated between the rigid tube and the straight connector, allowing the rigid tube to be secured to the straight connector. After the spacer is placed in the borehole, the upper end of the rigid tube 3 rests against the straight connector under pressure. There is a step inside the spacer tray, and the lower end of the spacer's charging tube 1 rests against the step of the spacer tray. There is also a large frictional force between the spacer tray and the charging tube. There is a step in the middle of the straight connector, and the lower end of the spacer's charging tube 1, wrapped with a flexible film, rests against the step of the straight connector. The overall structure can maintain its original shape unless subjected to a large tensile force. Inside the borehole, the entire structure is only subjected to pressure, and its integrity can be guaranteed.

[0025] Example 2 This utility model is a fixing device for a detonator-transmitting spacer, and its structure is as follows: Figure 1 As shown, it includes a straight connector 2 connected to the lower end of the spacer charging tube 1. The other end of the straight connector 2 is also fitted with a rigid tube 3. The lower end of the spacer charging tube 1 is fitted inside the upper end of the straight connector 2, and a flexible film 4 is also provided between the end of the lower end of the spacer charging tube 1 and the straight connector 2. The flexible film 4 seals the bottom of the lower end of the spacer charging tube 1. The rigid tube 3 has several through holes 5 on its tube wall for the explosive to pass through. An annular flexible bag 6 is also fixed on the lower end side wall of the rigid tube 3 to contain the explosive. The through holes 5 of the rigid tube 3 are all located inside the flexible bag 6.

[0026] Before being placed into the borehole, the flexible bag 6 is fixed to the rigid tube 3 without being opened. After being opened, the diameter of the flexible bag 6 is larger than the inner diameter of the borehole. The rigid tube 3 has several through holes 5 for the explosive to pass through.

[0027] like Figure 2As shown, when applying this embodiment to the placement of spacers into waterless boreholes, firstly, the flexible film 4 is placed on the upper end of the straight connector 2. The lower end of the spacer's charging tube 1 is then inserted from top to bottom into the upper end of the straight connector 2. The bottom of the lower end of the charging tube 1 is sealed with the flexible film 4. Then, the rigid tube 3 is connected to the straight connector 2. The lower end wall of the rigid tube 3 has several small holes. A flexible bag 6 is fixed to the outside of the rigid tube 3. The spacer with the fixing device is placed into the borehole. The explosive in the borehole will enter from the bottom of the rigid tube 3 and then flow into the flexible bag 6 through the through hole 5. After the flexible bag is filled, it opens and clamps the inner wall of the borehole to fix the spacer.

[0028] The upper end of the rigid tube 3 and the lower end of the straight connector 2 are in clearance fit (clearance ≤ 0.2mm). The rigid tube rests against the step inside the straight connector, and a large frictional force is generated between the rigid tube and the straight connector, allowing the rigid tube to be secured to the straight connector. After the spacer is placed in the borehole, the upper end of the rigid tube 3 rests against the straight connector under pressure. There is a step inside the spacer tray, and the lower end of the spacer's charging tube 1 rests against the step of the spacer tray. There is also a large frictional force between the spacer tray and the charging tube. There is a step in the middle of the straight connector, and the lower end of the spacer's charging tube 1, wrapped with a flexible film, rests against the step of the straight connector. The overall structure can maintain its original shape unless subjected to a large tensile force. Inside the borehole, the entire structure is only subjected to pressure, and its integrity can be guaranteed.

[0029] The connection between the flexible bag 6 and the lower end of the rigid tube 3 is a sealed connection.

[0030] Example 3 This utility model is a fixing device for a detonator-transmitting spacer, and its structure is as follows: Figure 1 As shown, it includes a straight connector 2 connected to the lower end of the spacer charging tube 1. The other end of the straight connector 2 is also fitted with a rigid tube 3. The lower end of the spacer charging tube 1 is fitted inside the upper end of the straight connector 2, and a flexible film 4 is also provided between the end of the lower end of the spacer charging tube 1 and the straight connector 2. The flexible film 4 seals the bottom of the lower end of the spacer charging tube 1. The rigid tube 3 has several through holes 5 on its tube wall for the explosive to pass through. An annular flexible bag 6 is also fixed on the lower end side wall of the rigid tube 3 to contain the explosive. The through holes 5 of the rigid tube 3 are all located inside the flexible bag 6.

[0031] Before being placed into the borehole, the flexible bag 6 is fixed to the rigid tube 3 without being opened. After being opened, the diameter of the flexible bag 6 is larger than the inner diameter of the borehole. The rigid tube 3 has several through holes 5 for the explosive to pass through.

[0032] like Figure 2As shown, when applying this embodiment to the placement of spacers into waterless boreholes, firstly, the flexible film 4 is placed on the upper end of the straight connector 2. The lower end of the spacer's charging tube 1 is then inserted from top to bottom into the upper end of the straight connector 2. The bottom of the lower end of the charging tube 1 is sealed with the flexible film 4. Then, the rigid tube 3 is connected to the straight connector 2. The lower end wall of the rigid tube 3 has several small holes. A flexible bag 6 is fixed to the outside of the rigid tube 3. The spacer with the fixing device is placed into the borehole. The explosive in the borehole will enter from the bottom of the rigid tube 3 and then flow into the flexible bag 6 through the through hole 5. After the flexible bag is filled, it opens and clamps the inner wall of the borehole to fix the spacer.

[0033] The upper end of the rigid tube 3 and the lower end of the straight connector 2 are in clearance fit (clearance ≤ 0.2mm). The rigid tube rests against the step inside the straight connector, and a large frictional force is generated between the rigid tube and the straight connector, allowing the rigid tube to be secured to the straight connector. After the spacer is placed in the borehole, the upper end of the rigid tube 3 rests against the straight connector under pressure. There is a step inside the spacer tray, and the lower end of the spacer's charging tube 1 rests against the step of the spacer tray. There is also a large frictional force between the spacer tray and the charging tube. There is a step in the middle of the straight connector, and the lower end of the spacer's charging tube 1, wrapped with a flexible film, rests against the step of the straight connector. The overall structure can maintain its original shape unless subjected to a large tensile force. Inside the borehole, the entire structure is only subjected to pressure, and its integrity can be guaranteed.

[0034] The connection between the flexible bag 6 and the lower end of the rigid tube 3 is a sealed connection.

[0035] The outer diameter of the lower end of the spacer's charging tube 1 is the same as the inner diameter of the upper end of the straight connector 2. An annular step is provided in the middle of the inside of the straight connector 2. After the lower end of the spacer's charging tube 1 is installed on the upper end of the straight connector 2, the lower end of the lower end of the spacer's charging tube 1 is located on the step.

[0036] Example 4 This utility model is a fixing device for a detonator-transmitting spacer, and its structure is as follows: Figure 1 As shown, it includes a straight connector 2 connected to the lower end of the spacer charging tube 1. The other end of the straight connector 2 is also fitted with a rigid tube 3. The lower end of the spacer charging tube 1 is fitted inside the upper end of the straight connector 2, and a flexible film 4 is also provided between the end of the lower end of the spacer charging tube 1 and the straight connector 2. The flexible film 4 seals the bottom of the lower end of the spacer charging tube 1. The rigid tube 3 has several through holes 5 on its tube wall for the explosive to pass through. An annular flexible bag 6 is also fixed on the lower end side wall of the rigid tube 3 to contain the explosive. The through holes 5 of the rigid tube 3 are all located inside the flexible bag 6.

[0037] Before being placed into the borehole, the flexible bag 6 is fixed to the rigid tube 3 without being opened. After being opened, the diameter of the flexible bag 6 is larger than the inner diameter of the borehole. The rigid tube 3 has several through holes 5 for the explosive to pass through.

[0038] like Figure 2 As shown, when applying this embodiment to the placement of spacers into waterless boreholes, firstly, the flexible film 4 is placed on the upper end of the straight connector 2. The lower end of the spacer's charging tube 1 is then inserted from top to bottom into the upper end of the straight connector 2. The bottom of the lower end of the charging tube 1 is sealed with the flexible film 4. Then, the rigid tube 3 is connected to the straight connector 2. The lower end wall of the rigid tube 3 has several small holes. A flexible bag 6 is fixed to the outside of the rigid tube 3. The spacer with the fixing device is placed into the borehole. The explosive in the borehole will enter from the bottom of the rigid tube 3 and then flow into the flexible bag 6 through the through hole 5. After the flexible bag is filled, it opens and clamps the inner wall of the borehole to fix the spacer.

[0039] The upper end of the rigid tube 3 and the lower end of the straight connector 2 are in clearance fit (clearance ≤ 0.2mm). The rigid tube rests against the step inside the straight connector, and a large frictional force is generated between the rigid tube and the straight connector, allowing the rigid tube to be secured to the straight connector. After the spacer is placed in the borehole, the upper end of the rigid tube 3 rests against the straight connector under pressure. There is a step inside the spacer tray, and the lower end of the spacer's charging tube 1 rests against the step of the spacer tray. There is also a large frictional force between the spacer tray and the charging tube. There is a step in the middle of the straight connector, and the lower end of the spacer's charging tube 1, wrapped with a flexible film, rests against the step of the straight connector. The overall structure can maintain its original shape unless subjected to a large tensile force. Inside the borehole, the entire structure is only subjected to pressure, and its integrity can be guaranteed.

[0040] The connection between the flexible bag 6 and the lower end of the rigid tube 3 is a sealed connection.

[0041] The outer diameter of the lower end of the spacer's charging tube 1 is the same as the inner diameter of the upper end of the straight connector 2. An annular step is provided in the middle of the inside of the straight connector 2. After the lower end of the spacer's charging tube 1 is installed on the upper end of the straight connector 2, the lower end of the lower end of the spacer's charging tube 1 is located on the step.

[0042] The diameter of the flexible film 4 is larger than the outer diameter of the drug loading tube 1 at the lower end of the spacer. After the drug loading tube 1 at the lower end of the spacer and the straight connector 2 are installed and connected, the flexible film 4 is clamped and fixed at the step by the drug loading tube 1 at the lower end of the spacer and the straight connector 2.

[0043] Example 5 This utility model is a fixing device for a detonator-transmitting spacer, and its structure is as follows: Figure 1As shown, it includes a straight connector 2 connected to the lower end of the spacer charging tube 1. The other end of the straight connector 2 is also fitted with a rigid tube 3. The lower end of the spacer charging tube 1 is fitted inside the upper end of the straight connector 2, and a flexible film 4 is also provided between the end of the lower end of the spacer charging tube 1 and the straight connector 2. The flexible film 4 seals the bottom of the lower end of the spacer charging tube 1. The rigid tube 3 has several through holes 5 on its tube wall for the explosive to pass through. An annular flexible bag 6 is also fixed on the lower end side wall of the rigid tube 3 to contain the explosive. The through holes 5 of the rigid tube 3 are all located inside the flexible bag 6.

[0044] Before being placed into the borehole, the flexible bag 6 is fixed to the rigid tube 3 without being opened. After being opened, the diameter of the flexible bag 6 is larger than the inner diameter of the borehole. The rigid tube 3 has several through holes 5 for the explosive to pass through.

[0045] like Figure 2 As shown, when applying this embodiment to the placement of spacers into waterless boreholes, firstly, the flexible film 4 is placed on the upper end of the straight connector 2. The lower end of the spacer's charging tube 1 is then inserted from top to bottom into the upper end of the straight connector 2. The bottom of the lower end of the charging tube 1 is sealed with the flexible film 4. Then, the rigid tube 3 is connected to the straight connector 2. The lower end wall of the rigid tube 3 has several small holes. A flexible bag 6 is fixed to the outside of the rigid tube 3. The spacer with the fixing device is placed into the borehole. The explosive in the borehole will enter from the bottom of the rigid tube 3 and then flow into the flexible bag 6 through the through hole 5. After the flexible bag is filled, it opens and clamps the inner wall of the borehole to fix the spacer.

[0046] The upper end of the rigid tube 3 and the lower end of the straight connector 2 are in clearance fit (clearance ≤ 0.2mm). The rigid tube rests against the step inside the straight connector, and a large frictional force is generated between the rigid tube and the straight connector, allowing the rigid tube to be secured to the straight connector. After the spacer is placed in the borehole, the upper end of the rigid tube 3 rests against the straight connector under pressure. There is a step inside the spacer tray, and the lower end of the spacer's charging tube 1 rests against the step of the spacer tray. There is also a large frictional force between the spacer tray and the charging tube. There is a step in the middle of the straight connector, and the lower end of the spacer's charging tube 1, wrapped with a flexible film, rests against the step of the straight connector. The overall structure can maintain its original shape unless subjected to a large tensile force. Inside the borehole, the entire structure is only subjected to pressure, and its integrity can be guaranteed.

[0047] The connection between the flexible bag 6 and the lower end of the rigid tube 3 is a sealed connection.

[0048] The outer diameter of the lower end of the spacer's charging tube 1 is the same as the inner diameter of the upper end of the straight connector 2. An annular step is provided in the middle of the inside of the straight connector 2. After the lower end of the spacer's charging tube 1 is installed on the upper end of the straight connector 2, the lower end of the lower end of the spacer's charging tube 1 is located on the step.

[0049] The diameter of the flexible film 4 is larger than the outer diameter of the drug loading tube 1 at the lower end of the spacer. After the drug loading tube 1 at the lower end of the spacer and the straight connector 2 are installed and connected, the flexible film 4 is clamped and fixed at the step by the drug loading tube 1 at the lower end of the spacer and the straight connector 2.

[0050] The diameter of the flexible bag 6 after it is filled and opened is larger than the diameter of the borehole.

[0051] The outer diameter of the upper end of the rigid tube 3 is adapted to the inner diameter of the lower end of the straight connector 2, and the upper end of the rigid tube 3 extends into the lower end of the straight connector 2.

[0052] Example 6 This utility model is a fixing device for a detonator-transmitting spacer, and its structure is as follows: Figure 1 As shown, it includes a straight connector 2 connected to the lower end of the spacer charging tube 1. The other end of the straight connector 2 is also fitted with a rigid tube 3. The lower end of the spacer charging tube 1 is fitted inside the upper end of the straight connector 2, and a flexible film 4 is also provided between the end of the lower end of the spacer charging tube 1 and the straight connector 2. The flexible film 4 seals the bottom of the lower end of the spacer charging tube 1. The rigid tube 3 has several through holes 5 on its tube wall for the explosive to pass through. An annular flexible bag 6 is also fixed on the lower end side wall of the rigid tube 3 to contain the explosive. The through holes 5 of the rigid tube 3 are all located inside the flexible bag 6.

[0053] Before being placed into the borehole, the flexible bag 6 is fixed to the rigid tube 3 without being opened. After being opened, the diameter of the flexible bag 6 is larger than the inner diameter of the borehole. The rigid tube 3 has several through holes 5 for the explosive to pass through.

[0054] like Figure 2 As shown, when applying this embodiment to the placement of spacers into waterless boreholes, firstly, the flexible film 4 is placed on the upper end of the straight connector 2. The lower end of the spacer's charging tube 1 is then inserted from top to bottom into the upper end of the straight connector 2. The bottom of the lower end of the charging tube 1 is sealed with the flexible film 4. Then, the rigid tube 3 is connected to the straight connector 2. The lower end wall of the rigid tube 3 has several small holes. A flexible bag 6 is fixed to the outside of the rigid tube 3. The spacer with the fixing device is placed into the borehole. The explosive in the borehole will enter from the bottom of the rigid tube 3 and then flow into the flexible bag 6 through the through hole 5. After the flexible bag is filled, it opens and clamps the inner wall of the borehole to fix the spacer.

[0055] The upper end of the rigid tube 3 and the lower end of the straight connector 2 are in clearance fit (clearance ≤ 0.2mm). The rigid tube rests against the step inside the straight connector, and a large frictional force is generated between the rigid tube and the straight connector, allowing the rigid tube to be secured to the straight connector. After the spacer is placed in the borehole, the upper end of the rigid tube 3 rests against the straight connector under pressure. There is a step inside the spacer tray, and the lower end of the spacer's charging tube 1 rests against the step of the spacer tray. There is also a large frictional force between the spacer tray and the charging tube. There is a step in the middle of the straight connector, and the lower end of the spacer's charging tube 1, wrapped with a flexible film, rests against the step of the straight connector. The overall structure can maintain its original shape unless subjected to a large tensile force. Inside the borehole, the entire structure is only subjected to pressure, and its integrity can be guaranteed.

[0056] The connection between the flexible bag 6 and the lower end of the rigid tube 3 is a sealed connection.

[0057] The outer diameter of the lower end of the spacer's charging tube 1 is the same as the inner diameter of the upper end of the straight connector 2. An annular step is provided in the middle of the inside of the straight connector 2. After the lower end of the spacer's charging tube 1 is installed on the upper end of the straight connector 2, the lower end of the lower end of the spacer's charging tube 1 is located on the step.

[0058] The diameter of the flexible film 4 is larger than the outer diameter of the drug loading tube 1 at the lower end of the spacer. After the drug loading tube 1 at the lower end of the spacer and the straight connector 2 are installed and connected, the flexible film 4 is clamped and fixed at the step by the drug loading tube 1 at the lower end of the spacer and the straight connector 2.

[0059] The diameter of the flexible bag 6 after it is filled and opened is larger than the diameter of the borehole.

[0060] The outer diameter of the upper end of the rigid tube 3 is adapted to the inner diameter of the lower end of the straight connector 2, and the upper end of the rigid tube 3 extends into the lower end of the straight connector 2.

[0061] The flexible film 4 is made of low-density polyethylene (LDPE), polypropylene (PP), or polyurethane (PU) film. The thickness of the flexible film is 0.1-0.3mm, which ensures sealing performance and has the flexibility to be clamped. It can be stably fixed by the steps of the lower end of the spacer's drug loading tube and the straight connector.

[0062] The flexible bag 6 is made of high-strength nylon cloth (nylon 66), polyester fiber (polyester) cloth or butyl rubber coated canvas; the thickness of the flexible bag is 0.3-0.8mm, and after being filled with explosives and opened, it can adhere tightly to the inner wall of the borehole by means of the tensile strength of the material, so as to achieve stable fixation of the spacer.

[0063] The flexible bag and rigid tube can be fixed in any of the following ways: a) High-strength industrial bonding: Use epoxy resin structural adhesive or polyurethane high-strength adhesive to bond the annular edge of the flexible bag to the lower outer wall of the rigid tube. Before bonding, the outer wall of the rigid tube needs to be ground to a roughness of Ra1.6-Ra3.2. After bonding, cure at room temperature for 24 hours. b) Heat sealing / welding: If the flexible bag is made of coated plastic sheet or thermoplastic polyurethane (TPU) film, use a high-frequency heat sealing machine (heat sealing temperature 120-150℃, pressure 0.3-0.5MPa) to heat seal the edge of the flexible bag to the outer wall of the rigid tube; if the flexible bag is a multi-layer nylon cloth + hot melt adhesive composite structure, use a hot air welding machine (hot air temperature 200-250℃) to weld the edge of the flexible bag to the outer wall of the rigid tube. c) Mechanical fastening + sealing assistance: Process 2-3 annular grooves (groove depth 0.5-1mm, groove width adapted to the thickness of the flexible bag) on ​​the outer wall of the lower end of the rigid tube. After fitting the annular edge of the flexible bag into the groove, fasten it with stainless steel hose clamps (width 8-12mm). Fill the gap between the groove and the edge of the flexible bag with nitrile rubber sealant.

[0064] Rigid tube 3 is made of rigid PVC or PE material.

[0065] Example 7 In some embodiments, the straight connector has a sealing structure and does not require a flexible membrane. The flexible bag 6 is fixed to the outer wall of the straight connector 2. The lower part of the tube wall of the straight connector 2 has several through holes for explosives to pass through. Specifically, the fixing device for the detonating spacer includes a straight connector 2 connected to the lower end charging tube 1 of the spacer. The lower end charging tube 1 of the spacer is sleeved inside the upper end of the straight connector 2, and a sealing structure is provided inside the straight connector 2 at the position of the lower end of the lower end charging tube 1 of the spacer. When the lower end charging tube 1 of the spacer is sleeved inside the upper end of the straight connector 2, the sealing structure seals the lower end of the lower end charging tube 1 of the spacer. Several through holes 5 are provided on the lower end tube wall of the straight connector 2. An annular flexible bag 6 is also fixed on the lower end side wall of the straight connector 2. All through holes 5 are located inside the flexible bag 6.

[0066] The connection between the flexible bag 6 and the lower end of the straight connector 2 is a sealed connection.

[0067] The diameter of the flexible bag after it is opened is larger than the diameter of the borehole.

[0068] The flexible bag 6 is made of high-strength nylon cloth (nylon 66), polyester fiber (polyester) cloth or butyl rubber coated canvas; the thickness of the flexible bag is 0.3-0.8mm, and after being filled with explosives and opened, it can adhere tightly to the inner wall of the borehole by means of the tensile strength of the material, so as to achieve stable fixation of the spacer.

[0069] When this embodiment is applied to the placement of spacers into waterless boreholes, the lower end of the spacer's charging tube 1 is inserted from top to bottom into the upper end of the straight connector 2. The bottom of the lower end of the spacer's charging tube 1 is sealed using a sealing structure. The spacer with the fixing device installed is placed into the borehole. The explosive in the borehole will enter from the bottom of the straight connector 2 and then flow into the flexible bag 6 through the through hole 5. After the flexible bag is filled, it opens and clamps the inner wall of the borehole to fix the spacer.

Claims

1. A fixing device for a detonator-transmitting spacer, characterized in that, The device includes a straight connector (2) connected to the lower end of the spacer's drug-filling tube (1). The other end of the straight connector (2) is also fitted with a rigid tube (3). The lower end of the spacer's drug-filling tube (1) is fitted inside the upper end of the straight connector (2), and a flexible film (4) is provided between the end of the lower end of the spacer's drug-filling tube (1) and the straight connector (2). The flexible film (4) seals the bottom of the lower end of the spacer's drug-filling tube (1). The rigid tube (3) has several through holes (5) on its wall. An annular flexible bag (6) is also fixed on the lower side wall of the rigid tube (3). The through holes (5) of the rigid tube (3) are all located inside the flexible bag (6).

2. The fixing device for a detonator-transmitting spacer according to claim 1, characterized in that, The connection between the flexible bag (6) and the lower end of the rigid tube (3) is a sealed connection.

3. The fixing device for a detonator-transmitting spacer according to claim 1, characterized in that, The outer diameter of the lower end of the spacer loading tube (1) is the same as the inner diameter of the upper end of the straight connector (2). An annular step is provided in the middle of the inside of the straight connector (2). After the lower end of the spacer loading tube (1) is installed on the upper end of the straight connector (2), the lower end of the lower end of the spacer loading tube (1) is located on the step.

4. The fixing device for a detonator-transmitting spacer according to claim 3, characterized in that, The diameter of the flexible film (4) is larger than the outer diameter of the lower end of the spacer drug loading tube (1). After the lower end of the spacer drug loading tube (1) and the straight connector (2) are installed and connected, the flexible film (4) is clamped and fixed at the step by the lower end of the spacer drug loading tube (1) and the straight connector (2).

5. The fixing device for a detonator-transmitting spacer according to claim 1, characterized in that, The outer diameter of the upper end of the rigid tube (3) is adapted to the inner diameter of the lower end of the straight connector (2), and the upper end of the rigid tube (3) extends into the lower end of the straight connector (2).

6. The fixing device for a detonator-transmitting spacer according to claim 1, characterized in that, The flexible film (4) is made of low-density polyethylene (LDPE), polypropylene (PP), or polyurethane (PU) film; the thickness of the flexible film is 0.1-0.3 mm.

7. A fixing device for a detonator-transmitting spacer, characterized in that, The device includes a straight connector (2) connected to the lower end of the spacer's drug-filling tube (1). The lower end of the spacer's drug-filling tube (1) is fitted inside the upper end of the straight connector (2), and a sealing structure is provided inside the straight connector (2) at the lower end of the spacer's drug-filling tube (1). When the lower end of the spacer's drug-filling tube (1) is fitted inside the upper end of the straight connector (2), the sealing structure seals the lower end of the spacer's drug-filling tube (1). Several through holes (5) are provided on the lower end of the straight connector (2), and an annular flexible bag (6) is also fixed on the lower end of the straight connector (2). All the through holes (5) are located inside the flexible bag (6).

8. The fixing device for a detonator-transmitting spacer according to claim 7, characterized in that, The connection between the flexible bag (6) and the lower end of the straight connector (2) is a sealed connection.

9. The fixing device for a detonator-transmitting spacer according to claim 1 or 7, characterized in that, The flexible bag (6) has a diameter larger than the diameter of the borehole after it is filled and opened.

10. The fixing device for a detonator-transmitting spacer according to claim 1 or 7, characterized in that, The flexible bag (6) is made of high-strength nylon cloth, polyester fiber cloth or butyl rubber coated canvas; the thickness of the flexible bag is 0.3-0.8mm.

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