Orienting device for frozen soil blasting

Abstract

The orienting device comprises a blasting cylinder body, a kerf is formed in one side of the blasting cylinder body in the axial direction, a positioning part is arranged in the blasting cylinder body, a first water bag is arranged between the outer side of the positioning part and the inner side face of the blasting cylinder body, and a second water bag is arranged between the outer side of the positioning part and the inner side face of the blasting cylinder body. The axis of the first water drum coincides with the axis of the blasting barrel. A second water drum is arranged on the inner side face of the blasting barrel and located on the periphery of the kerf, the axis of the second water drum is perpendicular to the axis of the blasting barrel, and the side, away from the kerf, of the second water drum is attached to the first water drum. An inner cavity is formed in the positioning part, and a blasting charge is arranged in the inner cavity; according to the utility model, blasting energy can be directionally guided out, and energy loss and blasting temperature can be effectively reduced in the blasting process, so that the blasting strength is ensured, and frozen soil around the blasting hole is prevented from being quickly melted by high temperature generated by blasting.

Description

Technical Field

[0001] The utility model belongs to the technical field of frozen soil blasting, and relates to a directional device for frozen soil blasting. Background Technique

[0002] In the process of iron ore and magnetite mining in plateau permafrost areas, it is necessary to drill and blast hard frozen soil layers. During the frozen soil blasting process, in order to make the blasting energy relatively concentrated, a slotted pipe directional fracture blasting device is used to blast the frozen soil in the prior art. It is provided with slots on the cylinder body, and by detonating the explosive inside the cylinder body, the blasting energy is directed through the slots and concentratedly applied to the position to be blasted. However, the existing slotted pipe directional fracture blasting device is an air medium coupling type blasting device, which uses air as the energy transfer medium. Due to the compressibility and poor conductivity of air, a large amount of energy loss will occur during the blasting process. If a large amount of energy is lost during the transfer of blasting energy to the slots, combined with the harder texture of plateau permafrost iron ore and magnetite itself, it will affect the effect of frozen soil blasting and cracking. At the same time, a large amount of heat is generated by the explosive during the blasting process, and the high heat will cause the frozen soil around the blasting hole to melt rapidly, thereby affecting the stability of the soil layer around the blasting hole.

[0003] Therefore, in view of the above technical problems existing in the existing air medium coupling type slotted pipe directional fracture blasting device, the utility model discloses a directional device for frozen soil blasting. Content of the Utility Model

[0004] The purpose of the utility model is to provide a directional device for frozen soil blasting, which can realize the directional export of blasting energy, effectively reduce energy loss and blasting temperature during the blasting process, and thereby ensure the blasting strength while avoiding the rapid melting of the frozen soil around the blasting hole caused by the high temperature generated by the blasting.

[0005] The utility model is realized by the following technical solutions:

[0006] A directional device for frozen soil blasting includes a blasting cylinder body. A slot is axially arranged on one side of the blasting cylinder body. A positioning part is arranged inside the blasting cylinder body. A first water bag is arranged between the outer side of the positioning part and the inner side surface of the blasting cylinder body, and the axis of the first water bag coincides with the axis of the blasting cylinder body; on the inner side surface of the blasting cylinder body around the slot, a second water bag is arranged, the axis of the second water bag is perpendicular to the axis of the blasting cylinder body, and the side of the second water bag away from the slot is attached to the first water bag; an inner cavity is arranged inside the positioning part, and an explosive package is arranged in the inner cavity.

[0007] To better implement the present utility model, further, the positioning part includes a positioning cylinder, a positioning plug, and a sealing film. An inner cavity is provided inside the positioning cylinder, and a first water bag is arranged between the outer side surface of the positioning cylinder and the inner side surface of the blasting cylinder body. One end of the positioning cylinder is detachably provided with a positioning plug, the end of the positioning plug away from the positioning cylinder abuts against one end of the blasting cylinder body, and the other end of the positioning cylinder is sealed with a sealing film.

[0008] To better implement the present utility model, further, a wire threading hole is provided at the center of the positioning plug, and an electronic detonator is threaded through the wire threading hole. One end of the electronic detonator extends into the interior of the positioning cylinder and contacts the explosive package.

[0009] To better implement the present utility model, further, end cavities are symmetrically arranged at both ends inside the blasting cylinder body, and end water bags are filled inside the end cavities.

[0010] To better implement the present utility model, further, an opening is provided at one end of the end cavity away from the positioning part, and an end plug is installed in the opening in a threaded fit.

[0011] To better implement the present utility model, further, a PVC elastic sheet is provided on the side of the end plug close to the end water bag.

[0012] To better implement the present utility model, further, a gap is reserved between the inner side of the first water bag and the outer side surface of the positioning part.

[0013] To better implement the present utility model, further, the gap is less than or equal to 1 mm.

[0014] To better implement the present utility model, further, the blasting cylinder body is a PVC cylinder body, and the wall thickness of the blasting cylinder body is less than or equal to 2 mm.

[0015] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0016] The present utility model has the following advantages:

[0017] The utility model ensures the stability of the explosive package by arranging a cylindrical positioning part inside the blasting cylinder body, installing the explosive package through the positioning part and preventing the explosive package from violently moving. At the same time, a first water bag is sleeved outside the positioning part, and an annular second water bag is arranged on the inner side of the cut on the cylinder wall of the blasting cylinder body. When the explosive package explodes, the first water bag and the second water bag burst, and the blasting energy is quickly transmitted to the cut through the incompressibility of the water medium, and the loss during the energy propagation process is reduced to ensure the blasting strength. Moreover, the water medium can reduce the blasting temperature and extinguish the flame generated by the blasting, thereby avoiding the instability caused by the melting of the frozen soil layer around the blasting hole due to high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of an orientation device for frozen soil blasting;

[0019] Figure 2 is a schematic structural diagram of the positioning part;

[0020] Figure 3 is a schematic structural diagram of the blasting cylinder body;

[0021] Figure 4 is a schematic diagram of the installation and cooperation of the first water bag and the second water bag;

[0022] Figure 5 is a schematic diagram of the explosion structure of the first water bag and the second water bag;

[0023] Figure 6 is Figure 1 A - A sectional view of.

[0024] Wherein: 1 - blasting cylinder body; 2 - cut; 3 - positioning part; 4 - explosive package; 11 - end cavity; 12 - end water sac; 13 - end plug; 14 - PVC elastic sheet; 31 - positioning cylinder; 32 - positioning plug; 33 - sealing film; 111 - first water bag; 222 - second water bag. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following detailed descriptions are all illustrative and are intended to provide further explanations of the present utility model. Unless otherwise specified, all technical and scientific terms used in the present utility model have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present utility model. As used herein, unless the present utility model clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] For the convenience of description, if the words "upper", "lower", "left", and "right" appear in the present utility model, they only indicate the same direction as the upper, lower, left, and right directions of the accompanying drawings themselves, and do not limit the structure. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model.

[0028] Term explanation part: Terms such as "installation", "connection", "connection", and "fixation" in the present utility model should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection, it can be a direct connection or an indirect connection through an intermediate medium, it can be an internal connection between two elements, or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] Embodiment 1:

[0030] A directional device for frozen soil blasting in this embodiment, as Figure 1 , Figure 4 , Figure 5 , Figure 6 shown, includes a blasting cylinder 1. A cutting slot 2 is axially arranged on one side of the blasting cylinder 1. A positioning part 3 is arranged inside the blasting cylinder 1. A first water bag 111 is arranged between the outer side of the positioning part 3 and the inner side surface of the blasting cylinder 1, and the axis of the first water bag 111 coincides with the axis of the blasting cylinder 1; on the inner side surface of the blasting cylinder 1 around the cutting slot 2, a second water bag 222 is arranged, the axis of the second water bag 222 is perpendicular to the axis of the blasting cylinder 1, and the side of the second water bag 222 away from the cutting slot 2 is attached to the first water bag 111; an inner cavity is arranged inside the positioning part 3, and an explosive package 4 is arranged in the inner cavity.

[0031] When the explosive package 4 explodes, the impact force generated by the explosion causes the first water bag 111 to rupture first. Utilizing the incompressibility of the water medium, the impact generated by the blasting can be rapidly transmitted towards the cutting slot 2, while greatly reducing the loss of explosion energy. Moreover, the water medium released when the first water bag 111 arranged annularly outside the explosive package 4 ruptures can reduce the blasting temperature and extinguish the blasting flame. Additionally, the greater density of the water medium compared to air can effectively control the flying direction of fragments during the explosion. When the explosion energy is transmitted to the inner side of the cutting slot 2, it causes the second water bag 222 arranged annularly on the inner side of the cutting slot 2 to rupture. The water medium in the second water bag 222 rapidly transmits the blasting energy to the cutting slot 2, enabling the blasting energy to be ejected along the special direction defined by the cutting slot 2, thereby achieving the orientation of the blasting. Similarly, the effect of the water medium in the second water bag 222 is the same as that of the water medium in the first water bag 111, which can reduce the loss of blasting energy and avoid deflagration.

[0032] Embodiment 2:

[0033] A directional device for frozen soil blasting in this embodiment is improved based on Embodiment 1. As Figure 2 shown, the positioning part 3 includes a positioning cylinder 31, a positioning plug 32, and a sealing film 33. An inner cavity is provided inside the positioning cylinder 31, and a first water bag 111 is arranged between the outer side surface of the positioning cylinder 31 and the inner side surface of the blasting cylinder 1; a positioning plug 32 is detachably arranged at one end of the positioning cylinder 31, the end of the positioning plug 32 away from the positioning cylinder 31 abuts against one end of the blasting cylinder 1, and the other end of the positioning cylinder 31 is sealed with a sealing film 33.

[0034] Place the explosive package 4 in the inner cavity of the positioning cylinder 31, and axially limit the explosive package 4 through the sealing film 33 at one end of the inner cavity. A positioning plug 32 is installed at the other end of the inner cavity to axially limit the positioning cylinder 31 and the explosive package 4 inside it, avoiding violent movement of the positioning cylinder 31 and the explosive package 4 during transportation.

[0035] Furthermore, a wire threading hole is provided at the center of the positioning plug 32, and an electrically controlled detonator is threaded through the wire threading hole. One end of the electrically controlled detonator extends into the interior of the positioning cylinder 31 and contacts the explosive package 4, and the explosive package 4 can be detonated quickly and timely through the electrically controlled detonator.

[0036] Other parts of this embodiment are the same as those in Embodiment 1, so they will not be elaborated here.

[0037] Embodiment 3:

[0038] A directional device for frozen soil blasting in this embodiment is improved based on Embodiment 1 or 2. As Figure 3As shown, end cavities 11 are symmetrically arranged at both ends inside the blasting cylinder body 1, and end water bags 12 are filled inside the end cavities 11. There is a propagation gap between the end water bags 12 and the explosive package 4, and the propagation distance between the end water bags 12 and the explosive package 4 is much greater than the propagation distances between the explosive package 4 and the first water bag 111 and the second water bag 222. That is, after the explosive package 4 explodes, most of the energy is transmitted to the cut 2 through the water medium in the first water bag 111 and the second water bag 222. If there is still enough surplus energy, it will be further transmitted to the end water bags 12. After the end water bags 12 rupture, the water medium inside them can reduce energy loss.

[0039] Further, an opening is provided at one end of the end cavity 11 away from the positioning part 3, and an end plug 13 is threadedly installed inside the opening. A PVC elastic sheet 14 is provided on the side of the end plug 13 close to the end water bag 12. The end water bag 12 is pressed and fixed by the PVC elastic sheet 14 to prevent the end water bag 12 from moving.

[0040] Other parts of this embodiment are the same as those of Embodiment 1 or 2, so they will not be described in detail.

[0041] Embodiment 4:

[0042] A directional device for frozen soil blasting in this embodiment is improved on the basis of any one of Embodiments 1-3. A gap is reserved between the inner side of the first water bag 111 and the outer side of the positioning part 3, and the gap is less than or equal to 1 mm. Setting the gap is to ensure that the positioning part 3 can be conveniently installed inside the annular first water bag 111.

[0043] Other parts of this embodiment are the same as those of any one of Embodiments 1-3, so they will not be described in detail.

[0044] Embodiment 5:

[0045] A directional device for frozen soil blasting in this embodiment is improved on the basis of any one of Embodiments 1-4. The blasting cylinder body 1 is a PVC cylinder body, and the wall thickness of the blasting cylinder body 1 is less than or equal to 2 mm. The wall thickness needs to be set to be less than or equal to 2 mm, which can provide sufficient protection for the internal structure and at the same time avoid a large reduction in blasting energy due to too thick a wall.

[0046] Other parts of this embodiment are the same as those of any one of Embodiments 1-4, so they will not be described in detail.

[0047] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Any simple modification or equivalent change made to the above embodiments based on the technical essence of the present invention falls within the protection scope of the present invention.

Claims

1. A directional device for frozen soil blasting, comprising a blasting cylinder (1), one side of the blasting cylinder (1) being provided with a slit (2) along the axial direction, characterized in that: A positioning portion (3) is provided inside the blasting cylinder (1), a first water bag (111) is provided between the outer side of the positioning portion (3) and the inner side surface of the blasting cylinder (1), and the axis of the first water bag (111) is arranged to coincide with the axis of the blasting cylinder (1); a second water bag (222) is provided on the inner side surface of the blasting cylinder (1) around the slit (2), the axis of the second water bag (222) is arranged perpendicular to the axis of the blasting cylinder (1), and the side of the second water bag (222) away from the slit (2) is in contact with the first water bag (111); an inner cavity is provided inside the positioning portion (3), and an explosive bag (4) is arranged in the inner cavity.

2. A directional device for frozen soil blasting according to claim 1, characterized in that: The positioning portion (3) comprises a positioning tube (31), a positioning plug (32), and a blocking film (33); an inner cavity is provided inside the positioning tube (31); a first water bag (111) is provided between the outer side surface of the positioning tube (31) and the inner side surface of the blasting tube body (1); a positioning plug (32) is detachably provided at one end of the positioning tube (31); an end of the positioning plug (32) away from the positioning tube (31) abuts against one end of the blasting tube body (1); and a blocking film (33) is encapsulated at the other end of the positioning tube (31).

3. A directional device for frozen soil blasting according to claim 1 or 2, characterized in that: End cavities (11) are symmetrically arranged at both ends of the interior of the blasting cylinder (1), and the interior of the end cavity (11) is filled with an end water bag (12).

4. A directional device for frozen soil blasting according to claim 3, characterized in that: An opening is provided at one end of the end cavity (11) away from the positioning portion (3), and an end plug (13) is installed in the opening through a threaded connection.

5. A directional device for frozen soil blasting according to claim 4, characterized in that: A PVC spring piece (14) is arranged on one side of the end plug (13) close to the end water bag (12).

6. A directional device for frozen soil blasting according to claim 1 or 2, characterized in that: A gap is reserved between the inner side of the first water bag (111) and the outer side surface of the positioning portion (3).

7. A directional device for frozen soil blasting according to claim 6, characterized in that: The gap is less than or equal to 1 mm.

8. A directional device for frozen soil blasting according to claim 1 or 2, characterized in that: The blasting cylinder (1) is a PVC cylinder, and the cylinder wall thickness of the blasting cylinder (1) is less than or equal to 2 mm.

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