Buffering gun barrel capable of positioning and controlling directional isolation range

Abstract

The utility model discloses a localizable and controllable directional isolation range buffer gun barrel, which comprises a controllable directional isolation range buffer gun barrel and a positioning connector, the controllable directional isolation range buffer gun barrel comprises a sliding valve mechanism and a cartridge placing barrel which are coaxially arranged, and an energy dissipation material is filled between the sliding valve mechanism and the cartridge placing barrel. The cartridge placing cylinder comprises a semicircular inner cylinder and a hoop, and the semicircular inner cylinder is used for placing cartridges; the sliding valve mechanism is composed of an outer sliding valve and an inner sliding valve, the outer sliding valve and the inner sliding valve move in the arc direction of the outer side of the semicircular inner cylinder, and the inner sliding valve is arranged in the outer sliding valve. The buffering gun barrels with the controllable directional isolation range are longitudinally connected through the positioning connectors. The utility model has the advantages that the directional isolation range can be narrowed or enlarged by adjusting the sliding outer sliding valve and the sliding inner sliding valve, and the blasting effect is improved; the positioning connector can position the position of the explosive cartridge in the rock mass, and meanwhile, the positioning connector made of the high-elasticity spring is good in flexibility, so that charging and positioning of a blast hole are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel excavation by drill and blast method, in particular to a positionable, controllable and directional isolation range buffer cartridge. Background Technique

[0002] Blasting technology is an engineering technology that uses the energy of explosive explosion to destroy the original structure of a certain object and realizes different engineering purposes by means of charge arrangement and initiation method. Since blasting technology can save a large amount of manpower and material resources, it has been widely used in tunnel excavation at present. However, there are the following problems: (1) The irregularity of the damage to the surrounding rock by traditional blasting often causes accidents such as overbreak, underbreak, and even collapse during the tunnel excavation process. The problem of tunnel overbreak is serious, usually reaching more than 30 cm, which makes the later support difficult, and the thickness of the secondary lining needs to be increased, resulting in an increase in the construction period and material cost; (2) The amount of explosive and the drill and blast design parameters in the tunnel excavation by drill and blast method are unreasonable, and the smooth blasting effect cannot be achieved; (3) When excavating a tunnel, it is necessary to maintain the good stability of the surrounding rock, but the traditional blasting technology is difficult to control the blasting intensity, and the degree of disturbance to the rock mass is large, which is not conducive to the subsequent stable support of the tunnel; (4) The overbreak and underbreak of the tunnel are related to the arrangement of the peripheral holes on the heading face and the propagation of the explosion wave. The traditional cartridge placement method cannot achieve the directional range blasting of the rock mass on the heading face, which will also lead to the overbreak of the tunnel and the failure to achieve the smooth blasting effect; (5) The charging position in the blast hole affects the blasting effect and the amount of explosive used. Usually, the charging spacing in the blast hole is fixed, without considering the density of fissures and joints in different regions of the rock mass in front of the heading face, and the charging position in the area with sparse fissures and joints in the blast hole is not convenient for accurate positioning, resulting in poor blasting effect. Summary of the Invention

[0003] The object of the present utility model is to provide a positionable and controllable directional isolation range buffer barrel according to the deficiencies of the above-mentioned prior art, which includes a controllable directional isolation range buffer barrel and a positioning connector. One side of the controllable directional isolation range buffer barrel is a hollow semi-cylinder composed of a toothed slidable outer sliding flap and an inner sliding flap, which is filled with energy-absorbing material, and the other side is a ring-bolt cartridge placement cylinder for fixing cartridges. Determine the length of the positioning connector and the cartridge according to the density of fissures and joints in the rock mass in front of the heading face, connect them, place the positionable and controllable directional isolation range buffer barrel with cartridges into the peripheral blast holes in the rock mass of the heading face, and seal them with a sealing material. Detonate the cartridge, the explosion wave propagates circumferentially, the energy-absorbing material absorbs the explosion wave and prevents it from propagating into the rock mass, and the explosion wave on the other side directly propagates into the rock mass, causing the rock mass to rupture, realizing the directional propagation and directional isolation of the explosion wave, breaking the rock mass that needs to be blasted and keeping the rock mass that does not need to be blasted intact. At the same time, according to the different densities of fissures and joints in the rock mass in front of the heading face, accurately position the cartridge in the area with sparse fissures and joints in the blast hole, and accurately position the positioning connector in the area with dense fissures and joints, reducing the amount of explosive charge and saving costs. In addition, the sliding outer flap and the inner flap can be adjusted to reduce or enlarge the directional isolation range, improving the blasting effect.

[0004] The object of the present utility model is achieved by the following technical solutions:

[0005] A positionable and controllable directional isolation range buffer barrel, the controllable directional isolation range buffer barrel includes a sliding flap mechanism and a cartridge placement cylinder arranged coaxially. An energy-absorbing material is filled between the sliding flap mechanism and the cartridge placement cylinder. Threads are provided on the outer parts of both ends of the cartridge placement cylinder. The cartridge placement cylinder includes a semi-circular inner cylinder and a ring bolt. The semi-circular inner cylinder is used for placing cartridges, and the ring bolt is arranged at both ends of the semi-circular inner cylinder and is used for fixing the cartridges. The sliding flap mechanism is composed of an outer sliding flap and an inner sliding flap. Both the outer sliding flap and the inner sliding flap move along the outer arc of the semi-circular inner cylinder, and the inner sliding flap is arranged inside the outer sliding flap. The controllable directional isolation range buffer barrels are longitudinally connected through the positioning connector. The positioning connector includes a high-elastic spring and two threaded connectors. The two threaded connectors are connected by the high-elastic spring. Threads matching the threads on the outside of the cartridge placement cylinder are provided inside the threaded connectors.

[0006] The outer sliding flap includes an outer sliding flap side plate, an outer sliding flap axial end plate, and an outer sliding flap radial end plate. The outer sliding flap side plate is an arc plate. The outer sliding flap radial end plates are provided at both radial ends of the outer sliding flap side plate, and the outer sliding flap axial end plate is provided at one axial end of the outer sliding flap side plate. The inner sliding flap includes an inner sliding flap side plate, an inner sliding flap axial end plate, and an inner sliding flap radial end plate. The inner sliding flap side plate is an arc plate. The inner sliding flap radial end plates are provided at both radial ends of the inner sliding flap side plate, and the inner sliding flap axial end plate is provided at one axial end of the inner sliding flap side plate.

[0007] Two outer sliding flap chutes and two inner sliding flap chutes are arranged along the outer arc of the semi-circular inner cylinder. An outer sliding flap radial end plate slider that cooperates with the outer sliding flap chute is connected to the outer sliding flap radial end plate, and an inner sliding flap radial end plate slider that cooperates with the inner sliding flap chute is connected to the inner sliding flap radial end plate.

[0008] Outer sliding flap sliding teeth and outer sliding flap sliding grooves are alternately arranged along the inner side axial direction of the outer sliding flap side plate. Both the outer sliding flap sliding teeth and the outer sliding flap sliding grooves are arranged along the arc direction of the outer sliding flap side plate. Inner sliding flap sliding teeth and inner sliding flap sliding grooves are alternately arranged along the outer side axial direction of the inner sliding flap side plate. Both the inner sliding flap sliding teeth and the inner sliding flap sliding grooves are arranged along the arc direction of the inner sliding flap side plate. The outer sliding flap sliding teeth cooperate with the inner sliding flap sliding grooves, and the inner sliding flap sliding teeth cooperate with the outer sliding flap sliding grooves.

[0009] The energy dissipation material is filled in the enclosed space formed by the outer sliding flap side plate, the outer sliding flap axial end plate, the outer sliding flap radial end plate, the inner sliding flap side plate, the inner sliding flap axial end plate, and the inner sliding flap radial end plate.

[0010] The size and shape of the cartridge placement hole of the cartridge placement tube respectively correspond to the size and shape of the cartridge.

[0011] The positionable and controllable directional isolation range buffer blast tube equipped with the cartridge is placed in the peripheral blast holes of the tunnel face rock mass, and the peripheral blast holes are sealed with a sealing material. The positioning connector in the peripheral blast holes is located in the fracture and joint dense area of the tunnel face rock mass, and the cartridge in the peripheral blast holes is located in the fracture and joint sparse area of the tunnel face rock mass.

[0012] The advantages of the present utility model are:

[0013] (1) The energy dissipation material absorbs the blast wave and prevents it from propagating into the rock mass. On the other side, the blast wave directly propagates into the rock mass, causing the rock mass to rupture. It can achieve the directional propagation and directional isolation of the blast wave, break the rock mass that needs to be blasted, keep the rock mass that does not need to be blasted intact, and at the same time reduce the disturbance to the surrounding rock.

[0014] (2) Positionable and controllable directional isolation range buffer barrel. According to the different density of fissures and joints in the rock mass in front of the heading face, the position of the positioning connector and the controllable directional isolation range buffer barrel filled with cartridges can be adjusted in the blast hole. The explosive is accurately positioned in the area with sparse fissures and joints, and the positioning connector is accurately positioned in the area with dense fissures and joints, reducing the amount of explosive charge and saving costs.

[0015] (3) The positionable and controllable directional isolation range buffer barrel can be reused, saving costs.

[0016] (4) The adjustable sliding outer slide flap and inner slide flap can narrow or enlarge the directional isolation range, improving the blasting effect.

[0017] (5) The hoop can fix the cartridge, and it is convenient to install the cartridge.

[0018] (6) The positioning connector made of high-elastic spring has good flexibility, facilitating the charging and positioning of the blast hole. Description of the Drawings

[0019] Figure 1 Schematic diagram of the positionable and controllable directional isolation range buffer barrel of the present utility model;

[0020] Figure 2 Schematic diagram (I) of the controllable directional isolation range buffer barrel of the present utility model;

[0021] Figure 3 Schematic diagram (II) of the controllable directional isolation range buffer barrel of the present utility model;

[0022] Figure 4 Schematic diagram of the positioning connector of the present utility model;

[0023] Figure 5 is Figure 3 Cross-sectional view of A-A in

[0024] Figure 6 is Figure 3 Cross-sectional view of B-B in

[0025] Figure 7 is Figure 3 Cross-sectional view of C-C in

[0026] Figure 8 Schematic diagram of the principle of isolating the blast wave by the positionable and controllable directional isolation range buffer barrel of the present utility model;

[0027] Figure 9 Schematic diagram of the relationship between the layout of the positionable and controllable directional isolation range buffer barrel of the present utility model and the distribution of rock mass fissures and joints in front of the heading face;

[0028] As Figures 1-9 shown, the marks in the figure are respectively represented as:

[0029] 1. Positionable and controllable directional isolation range buffer gun, 2. Face rock mass, 3. Sealing material, 4. Explosion wave, 5. Crack, 6. Fracture and joint intensive area;

[0030] 11. Controllable directional isolation range buffer gun barrel, 12. Cartridge, 13. Positioning connector;

[0031] 111. Outer sliding flap, 112. Inner sliding flap, 113. Cartridge placement cylinder, 114. Energy dissipation material;

[0032] 1111. Outer sliding flap side plate, 1112. Outer sliding flap axial end plate, 1113. Outer sliding flap radial end plate, 1114. Outer sliding flap sliding teeth, 1115. Outer sliding flap sliding groove, 1116. Outer sliding flap radial end plate slider;

[0033] 1121. Inner sliding flap side plate, 1122. Inner sliding flap axial end plate, 1123. Inner sliding flap radial end plate, 1124. Inner sliding flap sliding teeth, 1125. Inner sliding flap sliding groove, 1126. Inner sliding flap radial end plate slider;

[0034] 1131. Hoop, 1132. Semi-circular inner cylinder, 1133. Cartridge placement hole, 1134. Outer sliding flap chute, 1135. Inner sliding flap chute, 1136. Thread;

[0035] 131. High-elastic spring, 132. Threaded connector;

[0036] 21. Peripheral blast holes. Specific embodiments

[0037] The features of the present utility model and other related features will be further described in detail below with reference to the accompanying drawings through embodiments for the understanding of those skilled in the same industry:

[0038] Embodiment: As Figures 1-9As shown in the figure, this embodiment relates to a positionable and controllable directional isolation range buffer barrel, which includes a controllable directional isolation range buffer barrel 11 and a positioning connector 13. The controllable directional isolation range buffer barrel 11 mainly includes a sliding valve mechanism, a cartridge placement cylinder 113, and an energy dissipation material 114. The sliding valve mechanism and the cartridge placement cylinder 113 are coaxially arranged, and the energy dissipation material 114 is filled between the sliding valve mechanism and the cartridge placement cylinder 113. In this embodiment, the energy dissipation material 114 can be made of rubber, granular material, liquid material, or porous material. The size and shape of the cartridge placement holes 1133 of the cartridge placement cylinder 113 respectively correspond to the size and shape of the cartridge 12 to ensure the reliability of the installation of the cartridge 12. Moreover, threads 1136 are provided on the outer sides of both ends of the cartridge placement cylinder 113. Specifically, the cartridge placement cylinder 113 includes a semi-circular inner cylinder 1132 and a hoop 1131. The semi-circular inner cylinder 1132 is used to place the cartridge 12, and the hoop 1131 is arranged at both ends of the semi-circular inner cylinder 1132 and is used to fix the cartridge 12. The sliding valve mechanism is composed of an outer sliding valve 111 and an inner sliding valve 112. Both the outer sliding valve 111 and the inner sliding valve 112 move along the outer arc of the semi-circular inner cylinder 1132, and the inner sliding valve 112 is arranged inside the outer sliding valve 111. By adjusting the size of the arc space between the outer sliding valve 111 and the inner sliding valve 112, the filling amount of the energy dissipation material 114 is changed, thereby achieving the purpose of reducing or enlarging the directional isolation range.

[0039] As Figures 1-7As shown in the figure, the outer sliding flap 111 includes an outer sliding flap side plate 1111, an outer sliding flap axial end plate 1112, and an outer sliding flap radial end plate 1113. The outer sliding flap side plate 1111 is an arc plate. One outer sliding flap radial end plate 1113 is provided at each of the two radial ends of the outer sliding flap side plate 1111, and one outer sliding flap axial end plate 1112 is provided at one axial end of the outer sliding flap side plate 1111. The inner sliding flap 112 includes an inner sliding flap side plate 1121, an inner sliding flap axial end plate 1122, and an inner sliding flap radial end plate 1123. The inner sliding flap side plate 1121 is an arc plate. One inner sliding flap radial end plate 1123 is provided at each of the two radial ends of the inner sliding flap side plate 1121, and one inner sliding flap axial end plate 1122 is provided at one axial end of the inner sliding flap side plate 1121. The energy dissipation material 114 is filled in the enclosed space formed by the outer sliding flap side plate 1111, the outer sliding flap axial end plate 1112, the outer sliding flap radial end plate 1113, the inner sliding flap side plate 1121, the inner sliding flap axial end plate 1122, and the inner sliding flap radial end plate 1123. Two outer sliding flap chutes 1134 and two inner sliding flap chutes 1135 are arranged along the outer arc of the semi-circular inner cylinder 1132. An outer sliding flap radial end plate slider 1116 is connected to the outer sliding flap radial end plate 1113, and an inner sliding flap radial end plate slider 1126 is connected to the inner sliding flap radial end plate 1123. The shape and size of the outer sliding flap radial end plate slider 1116 respectively match the shape and size of the outer sliding flap chute 1134, realizing the sliding of the outer sliding flap radial end plate 1113 on the semi-circular inner cylinder 1132. The shape and size of the inner sliding flap radial end plate slider 1126 respectively match the shape and size of the inner sliding flap chute 1135, realizing the sliding of the inner sliding flap radial end plate 1123 on the semi-circular inner cylinder 1132. The outer sliding flap side plate 1111 is alternately provided with outer sliding flap sliding teeth 1114 and outer sliding flap sliding grooves 1115 along its inner side in the axial direction, and both the outer sliding flap sliding teeth 1114 and the outer sliding flap sliding grooves 1115 are arranged along the arc of the outer sliding flap side plate 1111. The inner sliding flap side plate 1121 is alternately provided with inner sliding flap sliding teeth 1124 and inner sliding flap sliding grooves 1125 along its outer side in the axial direction, and both the inner sliding flap sliding teeth 1124 and the inner sliding flap sliding grooves 1125 are arranged along the arc of the inner sliding flap side plate 1121. The shape and size of the outer sliding flap sliding teeth 1114 respectively match the shape and size of the inner sliding flap sliding grooves 1125, and the shape and size of the inner sliding flap sliding teeth 1124 respectively match the shape and size of the outer sliding flap sliding grooves 1115, ensuring the mutual sliding between the outer sliding flap side plate 1111 and the inner sliding flap side plate 1121. The mutual sliding between the outer sliding flap 111 and the inner sliding flap 112 realizes the adjustment of the size of the arc-shaped space between the outer sliding flap 111 and the inner sliding flap 112.

[0040] As Figures 1-7As shown in the figure, the controllable directional isolation range buffer barrels 11 are longitudinally connected through a positioning connector 13. The positioning connector 13 includes a highly elastic spring 131 and two threaded connectors 132. The two threaded connectors 132 are connected by the highly elastic spring 131. Threads 1136 are provided inside the threaded connectors 132, and the threads 1136 inside the threaded connectors 132 are matched with the threads 1136 outside the cartridge placement barrel 113, realizing the longitudinal connection between the controllable directional isolation range buffer barrels 11. And by compressing the highly elastic spring 131, the length of the positioning connector 13 can be adjusted.

[0041] As Figures 8-9 shown in the figure, determine the lengths of the positioning connector 13 and the cartridge 12 according to the density of the fissure joints in the rock mass in front of the heading face and connect them. Place the controllable directional isolation range buffer barrel 11 (i.e., the positionable controllable directional isolation range buffer gun 1) containing the cartridge 12 into the peripheral blast hole 21 of the rock mass 2 of the heading face, and use a plugging material 3 (mortar or plugging mud) to plug the peripheral blast hole 21. Detonate the cartridge 12, and the shock wave 4 propagates circumferentially. The energy-absorbing material 114 absorbs the shock wave 4 to prevent it from propagating into the rock mass. The shock wave 4 on the other side directly propagates into the rock mass, causing the rock mass to rupture (cracks 5 are generated), realizing the directional propagation and directional isolation of the shock wave 4, making the rock mass to be blasted broken and the rock mass that does not need to be blasted remain intact. Among them, adjust the length of the positioning connector 13 (realized by compressing the highly elastic spring 131) so that the positioning connector 13 in the peripheral blast hole 21 is located in the fissure joint dense area 6 of the rock mass 2 of the heading face; select cartridges 12 (controllable directional isolation range buffer barrels 11) of different lengths so that the cartridges 12 in the peripheral blast hole 21 are located in the fissure joint sparse area of the rock mass 2 of the heading face.

[0042] The beneficial technical effects of this embodiment are as follows:

[0043] (1) The energy-absorbing material absorbs the shock wave to prevent it from propagating into the rock mass. The shock wave on the other side directly propagates into the rock mass, causing the rock mass to rupture, which can realize the directional propagation and directional isolation of the shock wave, making the rock mass to be blasted broken and the rock mass that does not need to be blasted remain intact, and at the same time reducing the disturbance to the surrounding rock;

[0044] (2) For the positionable controllable directional isolation range buffer barrel, according to the different density of the fissure joints in the rock mass in front of the heading face, the positions of the positioning connector and the controllable directional isolation range buffer barrel containing the cartridge in the blast hole can be adjusted. The explosive is accurately positioned in the fissure joint sparse area, and the positioning connector is accurately positioned in the fissure joint dense area, reducing the amount of explosive loaded and saving costs;

[0045] (3) The positionable controllable directional isolation range buffer barrel can be reused, saving costs;

[0046] (4) The adjustable sliding outer and inner sliding flaps can narrow or enlarge the directional isolation range to improve the blasting effect;

[0047] (5) The hoop can fix the cartridge and is convenient for installing the cartridge;

[0048] (6) The positioning connector made of a highly elastic spring has good flexibility and is convenient for charging and positioning in the blast hole.

[0049] Although the above embodiments have detailed the concept and embodiments of the purpose of the present invention with reference to the drawings, those of ordinary skill in the art can recognize that various improvements and transformations can still be made to the present invention without departing from the scope defined by the claims, so they will not be elaborated here one by one.

Claims

1. A positionable, controllable, directionally isolated range buffer barrel, characterized in that: The positionable and controllable directional isolation range buffer barrel includes a controllable directional isolation range buffer barrel and a positioning connector. The controllable directional isolation range buffer barrel includes a sliding flap mechanism and a cartridge placement cylinder arranged coaxially. An energy dissipation material is filled between the sliding flap mechanism and the cartridge placement cylinder. Threads are provided on the outer sides of both ends of the cartridge placement cylinder. The cartridge placement cylinder includes a semi-circular inner cylinder and a hoop. The semi-circular inner cylinder is used for placing cartridges, and the hoop is arranged at both ends of the semi-circular inner cylinder and is used for fixing the cartridges. The sliding flap mechanism is composed of an outer sliding flap and an inner sliding flap. Both the outer sliding flap and the inner sliding flap move along the outer arc of the semi-circular inner cylinder, and the inner sliding flap is arranged inside the outer sliding flap. The controllable directional isolation range buffer barrels are longitudinally connected through the positioning connector. The positioning connector includes a high-elastic spring and two threaded connectors. The two threaded connectors are connected by the high-elastic spring, and threads matching the threads on the outside of the cartridge placement cylinder are provided inside the threaded connectors.

2. The locatable, controllable, directionally isolated range buffering gun barrel according to claim 1, wherein: The outer sliding flap includes an outer sliding flap side plate, an outer sliding flap axial end plate, and an outer sliding flap radial end plate. The outer sliding flap side plate is an arc plate. The outer sliding flap radial end plates are provided at both radial ends of the outer sliding flap side plate, and the outer sliding flap axial end plate is provided at one axial end of the outer sliding flap side plate. The inner sliding flap includes an inner sliding flap side plate, an inner sliding flap axial end plate, and an inner sliding flap radial end plate. The inner sliding flap side plate is an arc plate. The inner sliding flap radial end plates are provided at both radial ends of the inner sliding flap side plate, and the inner sliding flap axial end plate is provided at one axial end of the inner sliding flap side plate.

3. The locatable, controllable, directionally isolated range buffering gun barrel according to claim 2, wherein: Two outer sliding flap chutes and two inner sliding flap chutes are arranged along the outer arc of the semi-circular inner cylinder. An outer sliding flap radial end plate slider matching the outer sliding flap chute is connected to the outer sliding flap radial end plate, and an inner sliding flap radial end plate slider matching the inner sliding flap chute is connected to the inner sliding flap radial end plate.

4. The locatable, controllable, directionally isolated, range-buffered gun barrel according to claim 2, wherein: Outer sliding flap sliding teeth and outer sliding flap sliding grooves are alternately arranged along the inner axial direction of the outer sliding flap side plate. Both the outer sliding flap sliding teeth and the outer sliding flap sliding grooves are arranged along the arc of the outer sliding flap side plate. Inner sliding flap sliding teeth and inner sliding flap sliding grooves are alternately arranged along the outer axial direction of the inner sliding flap side plate. Both the inner sliding flap sliding teeth and the inner sliding flap sliding grooves are arranged along the arc of the inner sliding flap side plate. The outer sliding flap sliding teeth are matched with the inner sliding flap sliding grooves, and the inner sliding flap sliding teeth are matched with the outer sliding flap sliding grooves.

5. The locatable, controllable, directionally isolated, range-buffered gun barrel according to claim 2, wherein: The energy dissipation material is filled in the enclosed space formed by the outer sliding flap side plate, the outer sliding flap axial end plate, the outer sliding flap radial end plate, the inner sliding flap side plate, the inner sliding flap axial end plate, and the inner sliding flap radial end plate.

6. The locatable, controllable, directionally isolated range buffer barrel according to claim 1, characterized in that: The size and shape of the cartridge placement hole of the cartridge placement cylinder respectively correspond to the size and shape of the cartridge.

7. The locatable, controllable, directionally isolated range buffer gun barrel according to claim 1, wherein: The positionable and controllable directional isolation range buffer cartridge containing the cartridge is placed in the peripheral blast holes of the tunnel face rock mass, and the peripheral blast holes are sealed with a sealing material. The positioning connector in the peripheral blast holes is located in the fracture and joint dense area of the tunnel face rock mass, and the cartridge in the peripheral blast holes is located in the fracture and joint sparse area of the tunnel face rock mass.

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