Carbon dioxide blasting device for tunneling blasting

Abstract

This utility model provides a carbon dioxide blasting device for tunneling blasting, belonging to the field of mining blasting technology. It includes two liquid storage pipes, connecting ends, two filling devices, two heaters, and two lead wires. The liquid storage pipes are coaxially spaced and have a receiving cavity, a release hole, and a constant pressure shear plate. The two liquid storage pipes are respectively provided with a bottom end and a top end. The adjacent ends of the two liquid storage pipes are connected to both sides of the connecting end. The two filling devices are respectively installed on the two liquid storage pipes and are used to add liquid carbon dioxide into the receiving cavity. The two heaters are respectively installed inside the two liquid storage pipes, and the two lead wires are respectively installed on the connecting end and the top end, with one end of the lead wire connected to the heater and the other end extending upwards. The carbon dioxide blasting device for tunneling blasting provided by this utility model reduces the cost of blasting consumables and reduces the operational difficulty caused by the dense arrangement of detonators and cumbersome wiring.

Description

Technical Field

[0001] This utility model belongs to the field of mining blasting technology, and more specifically, it relates to a carbon dioxide blasting device for tunneling blasting. Background Technology

[0002] Rock drilling and blasting technology, as a core process in infrastructure construction fields such as mining, tunnel construction, road construction, and water conservancy projects, plays an irreplaceable role in engineering construction. By rationally designing blasting parameters, it utilizes the energy of explosives to break rocks, achieving engineering goals such as rock excavation and ore body stripping, directly affecting project progress, construction costs, and operational safety.

[0003] Currently, detonators are widely used as initiating devices in rock drilling and blasting operations, detonating industrial explosives to achieve rock-breaking effects. As a key component of the blasting system, the performance and stability of the detonator directly affect the reliability of the blasting effect. However, using detonators in blasting operations results in a large consumption of initiating detonators, leading to high tunneling and blasting costs; furthermore, the placement of detonators is difficult, and wiring operations are cumbersome. Utility Model Content

[0004] The purpose of this utility model is to provide a carbon dioxide blasting device for tunneling blasting, so as to solve the technical problems of high cost, difficult layout and complicated wiring in the existing technology of mine blasting.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a carbon dioxide blasting device for tunneling blasting, comprising:

[0006] Two liquid storage tubes are arranged coaxially and spaced apart. Each liquid storage tube has a cavity inside for containing liquid medium. The outer wall is provided with a release hole connected to the cavity and a constant pressure shear plate covering the release hole. The two liquid storage tubes are respectively provided with a bottom end and a top end at their far ends.

[0007] A connecting end is installed between the two liquid storage tubes, with the adjacent ends of the two liquid storage tubes respectively connected to both sides of the connecting end;

[0008] Two filling devices are fixedly installed on the two liquid storage tubes respectively; the filling devices are used to add liquid carbon dioxide into the receiving cavity;

[0009] Two heaters are installed inside the two liquid storage tubes and connected to the connecting end and the top end, respectively; the heaters are used to heat liquid carbon dioxide.

[0010] Two lead wires are installed on the connecting end and the top end, respectively; one end of each lead wire is connected to the two heaters, and the other end extends upward.

[0011] In one possible implementation, the outer wall of the liquid storage tube is provided with an installation groove, the release hole is opened on the bottom surface of the installation groove, and the constant pressure shear plate is installed in the installation groove; the liquid storage tube is also provided with a fixing ring that is fitted into the installation groove and used to fix the constant pressure shear plate.

[0012] In one possible implementation, the bottom surface of the mounting groove is provided with a plurality of connecting holes arranged around the release hole, the constant pressure shear plate is provided with a through hole corresponding to the connecting hole, the fixing ring is provided with a countersunk hole corresponding to the through hole and a fastener installed in the countersunk hole, and the fastener passes through the through hole and is connected to the connecting hole.

[0013] In one possible implementation, the sum of the thicknesses of the retaining ring and the constant-pressure shear plate is less than or equal to the depth of the mounting groove.

[0014] In one possible implementation, there are multiple release holes, which are arranged along the axial direction or at axial intervals along the liquid storage tube.

[0015] In one possible implementation, the bottom end, the top end, and the connecting end are all detachably connected to the liquid storage tube.

[0016] In one possible implementation, the inner wall of the liquid storage tube is provided with internal thread sections at both ends, and the bottom end and the top end are provided with studs that mate with the internal thread sections. Both sides of the connecting end are provided with studs that connect to the two liquid storage tubes.

[0017] In one possible implementation, an installation hole is provided on the upper side of the outer wall of the liquid storage tube, and the filler is sealed and fixedly installed in the installation hole; the liquid storage tube is also provided with a cover plate for sealing and protecting the filler.

[0018] In one possible implementation, both the top end and the connecting end are provided with a clearance groove and a wire passage hole communicating with the clearance groove. One end of the heater is installed into the corresponding clearance groove, and one end of the lead wire passes through the wire passage hole and is connected to the heater.

[0019] In one possible implementation, the carbon dioxide blasting device for tunneling blasting further includes:

[0020] A long, narrow housing is installed on the outer wall of the two liquid storage tubes; the lower end of the long, narrow housing has an opening corresponding to the two leads, and the end near the top end has an outlet; a wire clip is provided on the inner wall of the long, narrow housing.

[0021] The first fixing plate is installed at one end of the elongated shell and is fixedly connected to the outer wall of the liquid storage tube on the lower side;

[0022] The second fixing plate is installed at the other end of the elongated shell and is arranged perpendicular to the first fixing plate; the second fixing plate is fixedly connected to the top end.

[0023] The beneficial effects of the carbon dioxide blasting device for tunneling blasting provided by this utility model are as follows: Compared with the prior art, the operation of the carbon dioxide blasting device for tunneling blasting of this utility model involves first assembling the device and checking the sealing of the liquid storage pipe, the integrity of the constant pressure shear plate, and the reliability of the connection of each component; then, liquid carbon dioxide is injected into the receiving cavity of the two liquid storage pipes according to the design amount through the filling device to ensure that the filling pressure meets the blasting parameter requirements; and the heater and the detonation control system are connected through the lead wire to ensure the circuit continuity; then, the assembled device is placed into the pre-drilled blasting hole, the position is adjusted so that the release hole faces the blasting target area, and the bottom end and the hole opening are fixed to prevent displacement; finally, the workers are evacuated to a safe area, and a signal is sent through the external control system, and the lead wire transmits current to the heater. The heater rapidly heats up, causing the liquid carbon dioxide to absorb heat and vaporize, and the volume expands rapidly to generate high pressure. When the pressure reaches the withstand limit of the constant pressure shear plate, the constant pressure shear plate ruptures, and high-pressure carbon dioxide is instantly ejected from the release hole, forming a powerful impact force to complete the rock blasting operation. In this way, the price of liquid carbon dioxide is lower than that of detonators, and the storage pipes and filling devices can be reused, which greatly reduces the cost of consumables for blasting. Furthermore, the overall structure of the device is modular, eliminating the need for a complex wiring network. Detonation preparation can be completed simply by connecting the heater with the lead wire, reducing the operational difficulty caused by the dense arrangement of detonators and cumbersome wiring. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 Schematic diagram of the structure of the carbon dioxide blasting device for tunneling blasting provided in the embodiments of this utility model Figure 1 ;

[0026] Figure 2 This is a schematic diagram showing the connection between the constant pressure shear plate and the liquid storage tube provided in an embodiment of the present invention;

[0027] Figure 3 A partial schematic diagram of the constant pressure shear plate and the liquid storage tube provided for an embodiment of this utility model;

[0028] Figure 4 This is a schematic diagram showing the connection between the heater and the top end head provided in an embodiment of the present invention;

[0029] Figure 5 A schematic diagram showing the connection between the filler and the liquid storage tube provided in an embodiment of this utility model;

[0030] Figure 6 Schematic diagram of the structure of the carbon dioxide blasting device for tunneling blasting provided in the embodiments of this utility model Figure 2 ;

[0031] Figure 7 A schematic diagram of the elongated shell provided in an embodiment of this utility model.

[0032] The following are the labeling elements in the figure:

[0033] 10. Liquid storage tube; 11. Receiving cavity; 12. Release hole; 13. Constant pressure shear plate; 14. Bottom end; 15. Top end; 16. Connecting end; 17. Filler; 18. Heater; 19. Lead wire; 20. Mounting groove; 21. Fixing ring; 22. Connecting hole; 23. Through hole; 24. Countersunk hole; 25. Fastener; 26. Stud; 27. Mounting hole; 28. Cover plate; 29. ​​Clearance groove; 30. Wire hole; 31. Long strip shell; 32. Opening; 33. Outlet; 34. Wire clamp; 35. First fixing plate; 36. Second fixing plate. Detailed Implementation

[0034] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0035] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0036] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] Please see Figures 1 to 6 The present invention provides a carbon dioxide blasting device for tunneling blasting. A carbon dioxide blasting device for tunneling blasting includes a liquid storage pipe 10, a connecting end 16, a filling device 17, a heater 18, and a lead wire 19. There are two liquid storage pipes 10, arranged coaxially and spaced apart. Each liquid storage pipe 10 has a receiving cavity 11 for containing liquid media. The outer wall is provided with a release hole 12 communicating with the receiving cavity 11 and a constant pressure shear plate 13 covering the release hole 12. The two liquid storage pipes 10 have a bottom end 14 and a top end 15 at their far ends, respectively. The connecting end 16 is installed between the two liquid storage pipes 10, with the two liquid storage pipes 10 close to each other at their near ends. Each part is connected to both sides of the connecting end 16; there are two fillers 17, which are fixedly installed on the two liquid storage tubes 10 respectively; the fillers 17 are used to add liquid carbon dioxide into the receiving cavity 11; there are two heaters 18, which are installed in the two liquid storage tubes 10 and are respectively connected to the connecting end 16 and the top end 15; the heaters 18 are used to heat the liquid carbon dioxide; there are two leads 19, which are respectively installed on the connecting end 16 and the top end 15; one end of the two leads 19 is connected to the two heaters 18 respectively, and the other end extends upward.

[0039] The carbon dioxide blasting device for tunneling provided by this utility model, compared with the prior art, has a core consisting of two coaxially spaced liquid storage pipes 10 forming the blasting body. The receiving cavity 11 inside the liquid storage pipe 10 is used to store liquid carbon dioxide, and the release hole 12 on the outer wall, together with the constant pressure shear plate 13, forms a pressure control structure to ensure that the blasting energy is released according to the design parameters. The two liquid storage pipes 10 are fixedly connected by a connecting end 16 in the middle, and bottom end 14 and top end 15 are respectively provided at both ends to achieve sealing. The overall structure is stable and easy to assemble. The filling device 17 serves as a medium supply component, which can accurately fill the two liquid storage pipes 10 with liquid carbon dioxide to meet different blasting intensity requirements. The heater 18 is installed inside the liquid storage pipe 10 and fixed to the connecting end 16 and top end 15 respectively. It is connected to an external control device through a lead wire 19 to form a complete energy activation system. The upward extension design of the lead wire 19 allows the operator to complete the detonation control from a safe distance.

[0040] During operation, the device is first assembled, and the sealing of the liquid storage pipe 10, the integrity of the constant pressure shear plate 13, and the reliability of the connections of each component are checked. Then, liquid carbon dioxide is injected into the receiving chambers 11 of the two liquid storage pipes 10 according to the design amount through the filling device 17, ensuring that the filling pressure meets the requirements of the blasting parameters. The heater 18 is connected to the detonation control system through the lead wire 19 to ensure the circuit is conductive. After that, the assembled device is placed into the pre-drilled blasting hole, and the position is adjusted so that the release hole 12 faces the blasting target area. The bottom end 14 is fixed to the position of the hole to prevent displacement. Finally, the workers are evacuated to a safe area. The signal is sent through the external control system, and the lead wire 19 transmits current to the heater 18. The heater 18 heats up rapidly, causing the liquid carbon dioxide to absorb heat and vaporize. The volume expands rapidly to generate high pressure. When the pressure reaches the withstand limit of the constant pressure shear plate 13, the constant pressure shear plate 13 ruptures, and high pressure carbon dioxide is instantly ejected from the release hole 12, forming a powerful impact force to complete the rock blasting operation. In this way, the price of liquid carbon dioxide is lower than that of detonators, and the storage pipe 10, filling device 17, etc. can be reused, which greatly reduces the cost of consumables for blasting; in addition, the overall structure of the device is modular, eliminating the need for a complex wiring network. Detonation preparation can be completed simply by connecting the heater 18 through the lead wire 19, reducing the operational difficulty caused by the dense arrangement of detonators and cumbersome wiring.

[0041] Currently, electronic detonators are expensive and blasting operations are complex, impacting tunnel construction costs. Furthermore, the slotting process results in high detonator and explosive consumption, leading to lower advance rates per blast. Therefore, using a carbon dioxide blasting device instead of electronic detonators is beneficial. Liquid carbon dioxide is cheaper than detonators, and components such as the storage pipe 10 and filling device 17 are reusable, significantly reducing blasting material costs. The device's modular structure eliminates the need for complex wiring networks; detonation preparation is completed simply by connecting the heater 18 to the lead wire 19, reducing operational difficulty. Additionally, this tunneling carbon dioxide blasting device can achieve smooth blasting effects in rock drilling.

[0042] Please see Figures 1 to 3 As a specific embodiment of the carbon dioxide blasting device for tunneling blasting provided by this utility model, the outer wall of the liquid storage pipe 10 is provided with an installation groove 20, and the release hole 12 is opened on the bottom surface of the installation groove 20. The constant pressure shear plate 13 is installed in the installation groove 20. The liquid storage pipe 10 is also provided with a fixing ring 21 that is installed in the installation groove 20 and used to fix the constant pressure shear plate 13. The installation groove 20 and the release hole 12 are opened in sequence on the outer wall of the liquid storage pipe 10. The constant pressure shear plate 13 is installed in the installation groove 20 and then fixed by the fixing ring 21. The installation groove 20 provides a precise installation positioning reference for the constant pressure shear plate 13, ensuring that the constant pressure shear plate 13 is accurately aligned with the release hole 12. The fixing ring 21 can firmly lock the constant pressure shear plate 13 to prevent it from loosening or shifting during filling, transportation and installation. This structure ensures that the constant pressure shear plate 13 is subjected to uniform force, enabling precise rupture when the burst pressure reaches the set value, thus improving the stability of the burst energy release; moreover, the fixing method is simple and reliable, facilitating the quick replacement of the constant pressure shear plate 13.

[0043] Please see Figures 1 to 3 , Figure 6As a specific embodiment of the carbon dioxide blasting device for tunneling blasting provided by this utility model, the bottom surface of the mounting groove 20 is provided with multiple connecting holes 22 arranged around the release hole 12. The constant pressure shear plate 13 is provided with through holes 23 corresponding to the connecting holes 22. The fixing ring 21 is provided with countersunk holes 24 corresponding to the through holes 23 and fasteners 25 installed in the countersunk holes 24. The fasteners 25 pass through the through holes 23 and connect to the connecting holes 22. The fixing method of the constant pressure shear plate 13 is optimized through refined structural design, which enhances the reliability of the device. Multiple connecting holes 22 are set around the release hole 12 at the bottom of the mounting groove 20 to form a ring-shaped distribution of fixing points; the constant pressure shear plate 13 is provided with corresponding through holes 23 to ensure precise alignment with the connecting holes 22; the fasteners 25 are built into the countersunk holes 24 on the fixing ring 21. By means of the fasteners 25 passing through the countersunk holes 24, through holes 23 and connecting holes 22 to form a fixed connection, the constant pressure shear plate 13 is tightly fixed. This structure ensures that the force on the fastener 25 is evenly distributed around the release hole 12, preventing localized deformation of the constant pressure shear plate 13 and guaranteeing its precise breakage under the set pressure. The countersunk hole 24 design allows the head of the fastener 25 to be embedded in the retaining ring 21 without protruding beyond the liquid storage tube 10. The detachable fastener 25 structure makes it easy to replace the constant pressure shear plate 13, allowing for flexible replacement of constant pressure shear plates 13 with different pressure ratings according to different rock hardness, thus improving the adaptability of the device.

[0044] Please see Figure 2 and Figure 3 In one specific embodiment of the carbon dioxide blasting device for tunneling blasting provided by this utility model, the sum of the thicknesses of the fixing ring 21 and the constant pressure shear plate 13 is less than or equal to the depth of the mounting groove 20. When the constant pressure shear plate 13 is installed in the mounting groove 20 through the fixing ring 21, the overall height of the two will not exceed the outer wall surface of the liquid storage pipe 10, forming a flush or recessed structural state. This design ensures, on the one hand, that the outer wall of the liquid storage pipe 10 remains flat, avoiding scratches on the hole wall or device jamming due to component protrusion when inserted into the blasting hole, facilitating quick and accurate installation; on the other hand, it prevents the fixing ring 21 and the constant pressure shear plate 13 from being deformed or damaged by external force collisions during transportation and installation, ensuring that the constant pressure accuracy of the constant pressure shear plate 13 is not affected.

[0045] Please see Figures 1 to 3As a specific embodiment of the carbon dioxide blasting device for tunneling blasting provided by this utility model, there are multiple release holes 12, which are arranged along the axial direction of the liquid storage pipe 10 or at axial intervals. The multiple release holes 12 are orderly distributed along the length of the liquid storage pipe 10, forming continuous or segmented energy release areas. This ensures that the high-pressure carbon dioxide can act uniformly on the rock mass along the axial direction during blasting, so that the blasting energy is more evenly transferred to the surrounding rock along the axial direction of the liquid storage pipe 10, avoiding energy concentration or insufficiency caused by single-point release, and effectively controlling the blasting range and crushing effect. Preferably, each liquid storage pipe 10 is provided with four release holes 12 arranged in pairs, and the two sets of release holes 12 are symmetrically arranged.

[0046] Please see Figure 1 In one specific embodiment of the carbon dioxide blasting device for tunneling blasting provided by this utility model, the bottom end 14, the top end 15, and the connecting end 16 are all detachably connected to the liquid storage pipe 10. Specifically, the flexible assembly and disassembly of each component are achieved through threaded connections, snap-fit ​​engagements, etc., facilitating later maintenance and component replacement. When a certain end or liquid storage pipe 10 is damaged, it is not necessary to replace the entire device; only the damaged component needs to be replaced, reducing maintenance costs. Simultaneously, the detachable structure allows the device to flexibly replace different specifications of liquid storage pipe 10 or end heads according to blasting requirements, improving the equipment's versatility and reusability.

[0047] Please see Figure 1 As a specific embodiment of the carbon dioxide blasting device for tunneling blasting provided by this utility model, the inner wall of the liquid storage pipe 10 is provided with internal thread sections at both ends. The bottom end 14 and the top end 15 are each provided with studs 26 that mate with the internal thread sections. The connecting end 16 is provided with studs 26 on both sides that connect to the two liquid storage pipes 10. The internal thread sections at both ends of the inner wall of the liquid storage pipe 10 form a threaded engagement with the studs 26 on both sides of the bottom end 14, the top end 15, and the connecting end 16, enabling detachable connection of each component. Specifically, the studs 26 precisely engage with the internal thread sections, ensuring both connection stability and ease of manual or tool-assisted disassembly and assembly. The threaded connection provides strong sealing, effectively preventing liquid carbon dioxide leakage and ensuring stable blasting pressure.

[0048] Preferably, the stud 26, the corresponding bottom end 14, the top end 15, and the connecting end 16 are all integrally formed.

[0049] Please see Figure 1 , Figure 5 and Figure 6As a specific embodiment of the carbon dioxide blasting device for tunneling blasting provided by this utility model, an installation hole 27 is provided on the upper side of the outer wall of the liquid storage pipe 10, and the filler 17 is sealed and fixedly installed in the installation hole 27; a cover plate 28 for sealing and protecting the filler 17 is also provided on the liquid storage pipe 10. The installation hole 27 on the upper side of the outer wall of the liquid storage pipe 10, and the filler 17 sealed and fixed therein, along with the cover plate 28 for sealing and protection, form a safe and efficient medium filling structure. Specifically, the position of the installation hole 27 on the upper side of the outer wall is designed to facilitate the filling operation when the device is placed vertically, allowing for the injection of liquid carbon dioxide without turning the equipment over; the sealed and fixed installation of the filler 17 effectively prevents medium leakage during filling and blasting, ensuring stable pressure in the liquid storage chamber and guaranteeing that the blasting energy meets the standards. The cover plate 28 provides physical protection for the filler 17, preventing damage due to collision, friction, or rock compression during handling, installation, or operation in the blasting hole, thus extending its service life. A slot is provided on the liquid storage tube 10 adjacent to the filler 17, and a block is provided on the cover plate 28 to engage with the slot.

[0050] Please see Figure 1 , Figure 4 and Figure 6 As a specific embodiment of the carbon dioxide blasting device for tunneling blasting provided by this utility model, both the top end 15 and the connecting end 16 are provided with a relief groove 29 and a wire passage hole 30 connected to the relief groove 29. One end of the heater 18 is installed into the corresponding relief groove 29, and one end of the lead wire 19 passes through the wire passage hole 30 and is connected to the heater 18. The relief groove 29 provides a precise accommodating space for the end of the heater 18, so that the heater 18 can be stably embedded in the end head and avoid the position displacement of the heater 18 due to device shaking. The wire passage hole 30 serves as a dedicated channel for the lead wire 19 and is connected to the relief groove 29 to form a line conduction path. One end of the lead wire 19 passes through the wire passage hole 30 and is reliably connected to the heater 18 in the relief groove 29, and the other end extends to the external control system. With this structure, the positioning function of the clearance groove 29 ensures that the heater 18 is in full contact with the liquid carbon dioxide in the liquid storage pipe 10, thus ensuring stable heating efficiency; the wire hole 30 standardizes the routing of the lead wire 19, preventing the wire from being worn or broken due to messy tangling, and reducing the risk of circuit breakage.

[0051] Please see Figure 6 and Figure 7As a specific embodiment of the carbon dioxide blasting device for tunneling blasting provided by this utility model, the carbon dioxide blasting device for tunneling blasting also includes a long strip shell 31, a first fixing plate 35, and a second fixing plate 36. The long strip shell 31 is installed on the outer wall of two liquid storage pipes 10. The lower end of the long strip shell 31 has an opening 32 corresponding to the two lead wires 19, and the end near the top end 15 has an outlet 33. A wire clip 34 is provided on the inner wall of the long strip shell 31. The first fixing plate 35 is installed at one end of the long strip shell 31 and is fixedly connected to the outer wall of the liquid storage pipe 10 on the lower side. The second fixing plate 36 is installed at the other end of the long strip shell 31 and is arranged perpendicular to the first fixing plate 35. The second fixing plate 36 is fixedly connected to the top end 15. Through the combined design of the long strip shell 31, the first fixing plate 35, and the second fixing plate 36, a special protection and fixing system for the lead wires 19 is constructed. Specifically, the elongated housing 31 is installed on the outer wall of the two liquid storage pipes 10. The lower opening 32 corresponds to the position of the lead wire 19 for it to enter, and the outlet 33 near the top end 15 is for the lead wire 19 to exit. The inner wall clamp 34 can fix the lead wire 19 in an orderly manner. The first fixing plate 35 located at one end of the elongated housing 31 is connected to the outer wall of the lower liquid storage pipe 10 with bolts, etc., while the second fixing plate 36 located at the other end of the elongated housing 31 is fixed to the top end 15 by means of a bending shape, forming a three-dimensional fixing structure. The elongated housing 31 provides a closed protective space for the lead wire 19, avoiding wear and breakage of the lead wire 19 due to friction, collision or rock compression when the device is transported, installed or operated in the blast hole. The clamp 34 can organize the line route and prevent the lead wire 19 from being messy and tangled, which may lead to poor contact or open circuit, reducing the risk of detonation failure.

[0052] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A carbon dioxide blasting device for tunneling blasting, characterized in that, include: Two liquid storage tubes are arranged coaxially and spaced apart. Each liquid storage tube has a cavity inside for containing liquid medium. The outer wall is provided with a release hole connected to the cavity and a constant pressure shear plate covering the release hole. The two liquid storage tubes are respectively provided with a bottom end and a top end at their far ends. A connecting end is installed between the two liquid storage tubes, with the adjacent ends of the two liquid storage tubes respectively connected to both sides of the connecting end; Two filling devices are fixedly installed on the two liquid storage tubes respectively; the filling devices are used to add liquid carbon dioxide into the receiving cavity; Two heaters are installed inside the two liquid storage tubes and connected to the connecting end and the top end respectively; the heaters are used to heat liquid carbon dioxide. Two lead wires are installed on the connection end and the top end, respectively; one end of each lead wire is connected to the two heaters, and the other end extends upward.

2. The carbon dioxide blasting device for tunneling blasting as described in claim 1, characterized in that, The outer wall of the liquid storage tube is provided with an installation groove, the release hole is opened on the bottom surface of the installation groove, and the constant pressure shear plate is installed in the installation groove; the liquid storage tube is also provided with a fixing ring that is fitted into the installation groove and used to fix the constant pressure shear plate.

3. The carbon dioxide blasting device for tunneling blasting as described in claim 2, characterized in that, The bottom surface of the mounting groove is provided with a plurality of connecting holes arranged around the release hole. The constant pressure shear plate is provided with a through hole corresponding to the connecting hole. The fixing ring is provided with a countersunk hole corresponding to the through hole and a fastener installed in the countersunk hole. The fastener passes through the through hole and is connected to the connecting hole.

4. The carbon dioxide blasting device for tunneling blasting as described in claim 3, characterized in that, The sum of the thicknesses of the fixing ring and the constant pressure shear plate is less than or equal to the depth of the mounting groove.

5. The carbon dioxide blasting device for tunneling blasting as described in claim 1, characterized in that, The number of release holes is multiple, and they are arranged along the axial direction or at axial intervals along the liquid storage tube.

6. The carbon dioxide blasting device for tunneling blasting as described in claim 1, characterized in that, The bottom end, the top end, and the connecting end are all detachably connected to the liquid storage tube.

7. The carbon dioxide blasting device for tunneling blasting as described in claim 6, characterized in that, The inner wall of the liquid storage tube is provided with internal thread sections at both ends. The bottom end and the top end are provided with studs that mate with the internal thread sections. Both sides of the connecting end are provided with studs that connect to the two liquid storage tubes.

8. The carbon dioxide blasting device for tunneling blasting as described in claim 1, characterized in that, An installation hole is provided on the upper side of the outer wall of the liquid storage tube, and the filler is sealed and fixedly installed in the installation hole; the liquid storage tube is also provided with a cover plate for sealing and protecting the filler.

9. The carbon dioxide blasting device for tunneling blasting as described in claim 1, characterized in that, Both the top end and the connecting end are provided with a clearance groove and a wire passage hole connected to the clearance groove. One end of the heater is installed into the corresponding clearance groove, and one end of the lead wire passes through the wire passage hole and is connected to the heater.

10. The carbon dioxide blasting device for tunneling blasting as described in claim 9, characterized in that, The carbon dioxide blasting device for tunneling blasting also includes: A long, narrow housing is installed on the outer wall of the two liquid storage tubes; the lower end of the long, narrow housing has an opening corresponding to the two leads, and the end near the top end has an outlet; a wire clip is provided on the inner wall of the long, narrow housing. The first fixing plate is installed at one end of the elongated shell and is fixedly connected to the outer wall of the liquid storage tube on the lower side; The second fixing plate is installed at the other end of the elongated shell and is arranged perpendicular to the first fixing plate; the second fixing plate is fixedly connected to the top end.

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