Segmented liquefied air rock breaking device

Abstract

This utility model belongs to the technical field of rock breaking devices, and specifically discloses a segmented liquefied air rock breaking device. It includes an installation head, a flexible energy storage tube, a liquid injection support tube, and fixing straps. One end of the installation head is fixedly connected to the open end of the flexible energy storage tube. One end of the liquid injection support tube passes through the installation head, and the other end extends to the bottom of the closed end of the flexible energy storage tube. Multiple fixing straps are arranged at intervals along the axial direction of the liquid injection support tube to bind the flexible energy storage tube to the liquid injection support tube and divide the flexible energy storage tube into multiple filling segments with hollow internal structures. Each filling segment has at least one filling unit, and the filling unit includes a filling box slidably fitted onto the liquid injection support tube. The filling box is slidably fitted onto the liquid injection support tube. The device also includes an ignition bridge wire. This utility model can adjust the interval and length of each segment according to the characteristics of the rock strata, thereby precisely controlling the rock fragmentation size and avoiding excessive crushing or energy waste.

Description

Technical Field

[0001] This utility model belongs to the technical field of rock breaking devices, and more specifically, relates to a segmented liquefied air rock breaking device. Background Technology

[0002] In rock breaking engineering, traditional blasting methods typically employ explosives or mechanical breaking techniques. While explosive blasting is highly efficient, it presents problems such as significant vibration, noise, and the risk of flying debris, which can adversely affect the surrounding environment and buildings. Furthermore, the use of explosives is subject to strict safety regulations, and transportation, storage, and operation costs are high. Mechanical breaking methods (such as hydraulic breakers), while offering better safety, are less efficient and less suitable for handling large volumes of rock or high-strength rock formations.

[0003] In recent years, liquefied air (LIFOA) rock breaking technology, primarily composed of liquid carbon dioxide and liquid nitrogen, has gradually attracted attention. This technology utilizes the rapid vaporization of liquefied gas upon heating to generate high pressure, causing rock to fracture. Compared to traditional explosive blasting, LIFOA rock breaking offers advantages such as less vibration, no harmful gases, and higher safety. However, existing LIFOA rock breaking devices are mostly monolithic structures. The hardness of the rock mass to be broken varies at different depths, and the distribution of liquefied air at different depths in monolithic LIFOA rock breaking devices is usually uniform. It is difficult to control the liquefied air filling within the device in segments, making it difficult to precisely adjust the blasting energy according to the rock strata. When the LIFOA rock breaking device is filled with too much liquefied air, it easily leads to problems such as excessively small rock fragments, excessive blasting vibration, and excessive liquefied air consumption. Conversely, when the LIFOA rock breaking device is filled with too little liquefied air, it easily leads to insufficient rock breaking. Existing monolithic LIFOA rock breaking devices are prone to uneven rock fragmentation or low energy utilization, affecting blasting effectiveness and economic efficiency.

[0004] Therefore, there is an urgent need for a liquefied air rock-breaking device that can be controlled in stages and is highly adaptable, in order to improve rock-breaking efficiency, reduce blasting vibration, and optimize the size of rock fragments. Utility Model Content

[0005] To address the aforementioned deficiencies or improvement needs of existing technologies, this utility model provides a segmented liquefied air rock-breaking device. The device's fixing straps bind a flexible energy storage tube to the injection support tube, thereby creating intervals on the flexible energy storage tube that are close to the outside of the injection support tube. These intervals can divide the flexible energy storage tube into multiple filling sections that can be filled with liquefied air. The number and distribution of these filling sections can be flexibly adjusted, making it suitable for rock strata of different hardness and fracture development levels. By adjusting the intervals and lengths of each section according to the characteristics of the rock strata, the rock fragmentation size can be precisely controlled, avoiding excessive fragmentation or energy waste.

[0006] To achieve the above objectives, this utility model proposes a segmented liquefied air rock-breaking device, including an installation head, a flexible energy storage pipe, a liquid injection support pipe, and a fixing strap, wherein...

[0007] One end of the mounting head is fixedly connected to the open end of the flexible energy storage tube. One end of the liquid injection support tube passes through the mounting head, and the other end extends to the bottom of the closed end of the flexible energy storage tube. Multiple fixing straps are provided, and the multiple fixing straps are arranged at intervals along the axial direction of the liquid injection support tube to bind the flexible energy storage tube to the liquid injection support tube and divide the flexible energy storage tube into multiple filling segments with hollow internal structures. Each filling segment is provided with at least one filling unit.

[0008] The injection support tube is provided with multiple injection holes;

[0009] The filling unit includes a filling box that is slidably sleeved on the injection support tube;

[0010] A filling box is slidably sleeved on the injection support tube;

[0011] The device also includes an ignition bridge wire with one end passing through the mounting head and the other end extending into all filling sections.

[0012] As a further preferred embodiment, the mounting head is also provided with an exhaust pipe that extends into all filling sections. The exhaust pipe has multiple exhaust ports on its wall, and the cavity inside the filling section is connected to the exhaust pipe through the exhaust ports.

[0013] As a further preferred embodiment, the exhaust pipe is provided with an exhaust connector at the top, the liquid injection support pipe is provided with a liquid injection connector at the top, and the exhaust connector and the liquid injection connector are respectively provided with an exhaust seal plug and a liquid injection seal plug.

[0014] As a further preferred embodiment, the lower part of the mounting head is provided with a mounting neck, the open end of the flexible energy storage tube is fitted onto the mounting neck, and a locking clamp is also fitted over the open end of the flexible energy storage tube, the locking clamp tightening the open end of the flexible energy storage tube onto the mounting neck.

[0015] As a further preferred embodiment, the filling box is filled with an adsorbent material, which is a granular or flake-shaped material with good liquid absorption capacity.

[0016] As a further preferred embodiment, the filling box is also provided with an inner sleeve in the middle of the direction of the liquid injection support tube axis, and both the liquid injection support tube and the ignition bridge wire are provided through the inner sleeve.

[0017] As a further preferred embodiment, the mounting head is also fixedly provided with an initiating head, which is connected to the ignition bridge wire.

[0018] As a further preferred embodiment, the detonator is provided with a control wire, which is connected to the detonation controller.

[0019] As a further preferred option, the fixing strap is adhesive tape or cable ties.

[0020] As a further preferred embodiment, a limiting cap is fixedly provided at the bottom of the injection support tube.

[0021] In summary, compared with the prior art, the above-described technical solution conceived by this utility model has the following main technical advantages:

[0022] 1. The flexible energy storage tube of this utility model has an open end at the upper end. The flexible energy storage tube is sleeved on the outside of the liquid injection support tube. The flexible energy storage tube is also provided with a fixing strap, which binds the flexible energy storage tube to the liquid injection support tube. This creates a spacer segment on the flexible energy storage tube that is close to the outer wall of the liquid injection support tube. The spacer segment can divide the flexible energy storage tube into multiple filling segments that can be filled with liquefied air. The number and distribution of the filling segments can be flexibly adjusted to adapt to rock strata with different hardness and degree of fracture development. The interval and length of each segment can be adjusted according to the characteristics of the rock strata to accurately control the rock fragmentation size and avoid excessive fragmentation or energy waste.

[0023] 2. This utility model has a filling unit within the filling section, and the filling unit includes a filling box. All filling boxes are slidably fitted onto the liquid injection support tube, allowing the position of the filling boxes to be adjusted according to the distribution of the filling section. The adsorbent material inside the filling box can adsorb liquefied air, making the liquefied air evenly dispersed, thereby improving the stability of the liquefied air explosion.

[0024] 3. The exhaust pipe of this utility model can discharge all the air in the filling section of the flexible energy storage pipe, which facilitates the full injection of liquefied air into the filling section, improves the liquefied air injection effect, and facilitates on-site liquid injection of the rock breaking device. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a segmented liquefied air rock-breaking device according to an embodiment of the present invention;

[0026] Figure 2 This is a first partial sectional view of a segmented liquefied air rock-breaking device according to an embodiment of the present invention;

[0027] Figure 3 This is a second partial sectional view of a segmented liquefied air rock-breaking device according to an embodiment of this utility model;

[0028] Figure 4 This is a cross-sectional view of the filling unit of a segmented liquefied air rock-breaking device according to an embodiment of this utility model.

[0029] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1-mounting head, 11-mounting neck, 2-locking clamp, 3-flexible energy storage tube, 31-filling section, 4-filling box, 41-injection hole, 42-adsorbent material, 43-inner sleeve, 5-injection support tube, 51-injection port, 52-limiting cap, 6-exhaust pipe, 61-exhaust connector, 7-ignition bridge wire, 71-bursting head, 8-fixing strap. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0031] Please refer to Figures 1 to 4 The present invention relates to a segmented liquefied air rock-breaking device, comprising an installation head 1, a flexible energy storage pipe 3, a liquid injection support pipe 5, and multiple filling units.

[0032] The mounting head 1 is connected to the upper end of the injection support tube 5, meaning the injection support tube 5 passes through the mounting head 1. The flexible energy storage tube 3 is a hollow, bottom-closed flexible cavity structure. The flexible energy storage tube 3 is sleeved on the injection support tube 5, extending to the bottom of the flexible energy storage tube 3, but with a gap between them. The opening of the flexible energy storage tube 3 is sleeved on the outer periphery of the mounting head 1 and is fixedly and sealed to the mounting head 1. Along the central axis of the injection support tube 5, multiple fixing straps 8 are also provided on the flexible energy storage tube 3. These multiple fixing straps 8 bind the flexible energy storage tube 3 to the injection support tube 5, thereby forming a spacer segment on the flexible energy storage tube 3 that is close to the outer wall of the injection support tube 5. The spacer segment divides the flexible energy storage tube 3 into multiple filling segments 31 that can accommodate liquefied air, and each filling segment 31 has at least one filling unit.

[0033] Preferably, the flexible energy storage tube 3 is made of high-toughness plastic bag material. The upper end of the flexible energy storage tube 3 is open, and the lower end of the flexible energy storage tube 3 is closed. The flexible energy storage tube 3 is sleeved on the liquid injection support tube 5 and all filling units. The open end of the flexible energy storage tube 3 is sealed and fixed to the mounting head 1. The flexible energy storage tube 3 is also provided with a fixing strap 8. In this embodiment, the fixing strap 8 is adhesive tape or binding tape. The fixing strap 8 binds the flexible energy storage tube 3 to the liquid injection support tube 5, thereby forming a spacer segment on the flexible energy storage tube 3 that is close to the outer wall of the liquid injection support tube 5. The spacer segment divides the flexible energy storage tube 3 into multiple filling segments 31 that can accommodate liquefied air. Each filling segment 31 has at least one filling unit.

[0034] The filling unit includes a filling box 4, which is a cylindrical structure. All filling boxes 4 are slidably sleeved on the liquid injection support tube 5. The filling box 4 is also filled with an adsorbent material 42, which is a granular or flake material with good liquid absorption capacity. The adsorbent material 42 is used to disperse and adsorb liquefied air, which can improve the stability of liquefied air explosion.

[0035] The upper end of the liquid injection support tube 5 is provided with a liquid injection connector 51, which is used to connect to the liquefied air injection device. The liquid injection connector 51 facilitates the injection of liquefied air into the liquid injection support tube 5. Multiple liquid injection holes 41 are distributed on the liquid injection support tube 5. The liquid injection holes 41 are used to introduce liquefied air into all filling sections 31.

[0036] The mounting head 1 is also fixedly equipped with an initiating head 71, on which an ignition bridge wire 7 is connected, extending into all filling sections 31. The initiating head 71 is equipped with a control wire, which is connected to an initiation controller. The initiation controller is used to energize the ignition bridge wire 7, causing it to heat liquefied air and thus detonate the rock-breaking device.

[0037] When using this segmented liquefied air rock-breaking device, first connect the filling unit in series with the injection support pipe 5, then put the flexible energy storage pipe 3 on the filling unit and the injection support pipe 5, and tie the open end of the flexible energy storage pipe 3 to the mounting head 1; then, as needed, tie the fixing straps 8 to the flexible energy storage pipe 3 to form intervals, with the intervals separating the filling sections 31; use the injection support pipe 5 to inject liquefied air into the flexible energy storage pipe 3 to fill the filling sections 31; place the filled segmented liquefied air rock-breaking device into the pre-drilled rock-breaking hole, and seal the upper end of the rock-breaking hole with filling material (such as soil or gravel); finally, detonate the rock-breaking device to complete the rock-breaking process.

[0038] The number and distribution of the filling sections 31 in this segmented liquefied air rock-breaking device can be flexibly adjusted to suit rock strata of varying hardness and fracture development. The intervals and lengths of each section can be adjusted according to the characteristics of the rock strata, thereby precisely controlling the size of the broken rock fragments and avoiding excessive crushing or energy waste. Furthermore, each filling section 31 contains a filling unit, and the adsorbent material 42 within the filling unit can adsorb liquefied air, ensuring uniform dispersion and improving the stability of the liquefied air blasting.

[0039] In a preferred embodiment, the mounting head 1 is further provided with an exhaust pipe 6, which extends into all filling sections 31. The exhaust pipe 6 has multiple exhaust ports distributed along its wall, and the cavities within the filling sections 31 communicate with the exhaust pipe 6 through these ports. The exhaust pipe 6 is used to discharge residual air from the flexible energy storage tube 3, facilitating the full injection of liquefied air into the filling sections 31, improving the liquefied air injection effect, and facilitating on-site liquefaction of the rock-breaking device. Specifically, the exhaust pipe 6 can be connected to an air extraction device before injecting liquefied air to extract residual air from the flexible energy storage tube 3.

[0040] In a preferred embodiment, the mounting head 1 has a mounting neck 11 at its lower part, and the open end of the flexible energy storage tube 3 is fitted onto the mounting neck 11. A locking clamp 2 is also fitted over the open end, and the locking clamp 2 tightens the open end of the flexible energy storage tube 3 onto the mounting neck 11. The mounting head 1 and the mounting neck 11 are an integrated structure, which can be made of foam material.

[0041] In a preferred embodiment, the sidewall of the filling box 4 is provided with multiple liquid guiding holes. This facilitates the entry of liquefied air into the filling box 4, allowing the adsorbent material 42 inside the filling box 4 to fully absorb the liquefied air.

[0042] In a preferred embodiment, the filling box 4 is provided with an inner sleeve 43, which is fixed inside the filling box 4 and extends through the filling box 4. The injection support tube 5 and the ignition bridge wire 7 both pass through the inner sleeves 43 of all filling boxes 4. This allows the filling box 4 to slide along the injection support tube 5, facilitating the adjustment of the filling unit position. A limiting cap 52 is fixedly provided at the bottom of the injection support tube 5, and the outer diameter of the limiting cap 52 is larger than the inner diameter of the inner sleeve 43. The limiting cap 52 prevents the filling unit from falling off the injection support tube 5, facilitating the installation of the filling unit.

[0043] In a preferred embodiment, the top of the exhaust pipe 6 and the top of the liquid injection support pipe 5 are respectively provided with an exhaust connector 61 and a liquid injection connector 51. The exhaust connector 61 and the liquid injection connector 51 are respectively provided with an exhaust sealing plug and a liquid injection sealing plug. The exhaust sealing plug is used to seal the exhaust connector 61 after the exhaust pipe 6 has finished pumping air, and the liquid injection sealing plug is used to seal the liquid injection connector 51 after the liquid injection filling is completed.

[0044] In this document, the directional terms such as front, back, top, and bottom are defined based on the location of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application.

[0045] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is 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 segmented liquefied air rock-breaking device, characterized in that, It includes an installation head (1), a flexible energy storage tube (3), a liquid injection support tube (5), and a fixing strap (8), among which, One end of the mounting head (1) is fixedly connected to the open end of the flexible energy storage tube (3). One end of the liquid injection support tube (5) passes through the mounting head (1) and the other end extends to the bottom of the closed end of the flexible energy storage tube (3). Multiple fixing straps (8) are provided. Multiple fixing straps (8) are arranged at intervals along the axial direction of the liquid injection support tube (5) to bind the flexible energy storage tube (3) to the liquid injection support tube (5) and divide the flexible energy storage tube (3) into multiple filling sections (31) with hollow internal structures. Each filling section (31) is provided with at least one filling unit. The injection support tube (5) is provided with multiple injection holes; The filling unit includes a filling box (4) that is slidably sleeved on the injection support tube (5); A filling box (4) is slidably sleeved on the injection support tube (5); The device also includes an ignition bridge wire (7) with one end passing through the mounting head (1) and the other end extending into all filling sections (31).

2. The segmented liquefied air rock-breaking device according to claim 1, characterized in that, The mounting head (1) is also provided with an exhaust pipe (6), which extends into all filling sections (31). The exhaust pipe (6) has multiple exhaust ports on its wall, and the cavity inside the filling section (31) is connected to the exhaust pipe (6) through the exhaust ports.

3. A segmented liquefied air rock-breaking device according to claim 2, characterized in that, The exhaust pipe (6) is provided with an exhaust connector at the top, and the liquid injection support pipe (5) is provided with a liquid injection connector at the top. The exhaust connector and the liquid injection connector are respectively provided with an exhaust seal plug and a liquid injection seal plug.

4. A segmented liquefied air rock-breaking device according to any one of claims 1-3, characterized in that, The mounting head (1) has a mounting neck at the bottom. The open end of the flexible energy storage tube (3) is fitted onto the mounting neck. A locking clamp is also fitted onto the open end of the flexible energy storage tube (3). The locking clamp tightens the open end of the flexible energy storage tube (3) onto the mounting neck.

5. A segmented liquefied air rock-breaking device according to claim 4, characterized in that, The filling box (4) is filled with an adsorbent material (42), which is a granular or sheet-like material with liquid absorption capacity.

6. A segmented liquefied air rock-breaking device according to claim 4, characterized in that, The filling box (4) is also provided with an inner sleeve (43) in the middle of the direction of the liquid injection support tube (5), and the liquid injection support tube (5) and the ignition bridge wire (7) are both arranged through the inner sleeve (43).

7. A segmented liquefied air rock-breaking device according to claim 6, characterized in that, The mounting head (1) is also fixedly provided with an initiator (71), which is connected to the ignition bridge wire (7).

8. A segmented liquefied air rock-breaking device according to claim 7, characterized in that, The detonator (71) is provided with a control wire, which is connected to the detonation controller.

9. A segmented liquefied air rock-breaking device according to claim 8, characterized in that, The fixing strap (8) is adhesive tape or binding tape.

10. A segmented liquefied air rock-breaking device according to claim 9, characterized in that, The bottom of the injection support tube (5) is fixedly provided with a limiting cap (52).

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