Spacer for blasting

Abstract

The utility model relates to the technical field of engineering blasting, and provides a spacer for blasting, which comprises an air bag, an air inlet and an air outlet, one end of the first air inlet nozzle is communicated with the interior of the air bag, and the first air inlet nozzle is used for supplying air to the air bag; one end of the first air pipe is inserted and communicated with the first air inlet nozzle, and the other end is communicated with an air supply end of air supply equipment; the other end of the second air inlet nozzle penetrates through the air bag and extends to the lower side of the air bag; one end of the second air pipe is inserted and communicated with the second air inlet nozzle, and the other end is communicated with an air supply end of air supply equipment; the number of the pressure retaining valves is two, and the two pressure retaining valves are arranged in the first air inlet nozzle and the second air inlet nozzle respectively. According to the technical scheme, whether an air leakage interval exists between the expanded air bag and the blast hole or not can be detected.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering blasting, in particular to a spacer for blasting. Background Art

[0002] Conventional soil and rock blasting is a professional technology that uses the compression, loosening, fragmentation and throwing effects of explosives in soil and rock media to achieve the desired purpose. Mining operations include drilling, blasting, mining, transportation and soil discharge. Among them, blasting is the leader of the mining process and an extremely important link. The cost accounts for about 15-20% of the total mining cost. Practice has proved that the quality of blasting directly affects the efficiency of mining, transportation, coarse crushing and other equipment and the total cost of the mine.

[0003] At present, the well-known air spacer structure for blasthole charging in the market is composed of an air bag, a traction rope, and a self-inflating device. When in use, the air spacer and the inflation joint are connected, and then protected with a sheath, and then placed in a predetermined position in the blasthole, so that the spacer is fully expanded on the hole wall to achieve blasthole spacing charging. Whether it is a built-in gas tank or an external gas supply device for air supply, the existing spacer cannot feedback whether the air bag is fully expanded to form an effective sealing support in the blasthole. When the air bag is not fully expanded and there is a gap between the blasthole and causes air leakage, the spacer is prone to dislocation and cannot achieve accurate positioning, which affects the blasting quality and operation safety.

[0004] Based on this, the present invention designs a special spacer for deep hole blasting to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a blasting spacer for the above-mentioned technical deficiencies, which can detect whether there is a leaking gap between the airbag and the blast hole after the airbag is expanded.

[0006] The technical solution adopted by the utility model is to provide a blasting spacer, comprising:

[0007] airbag, for placement in the blast hole;

[0008] A first air inlet nozzle, arranged on the upper side of the airbag, one end of which is connected to the interior of the airbag and is used to supply air to the airbag;

[0009] A first air pipe, one end of which is plugged and connected to the first air inlet nozzle, and the other end of which is used to be connected to the air supply end of the air supply device;

[0010] A second air inlet nozzle is arranged on the upper side of the airbag, and the other end thereof penetrates through the airbag and extends to the lower side of the airbag;

[0011] A second air pipe, one end of which is plugged and connected to the second air inlet nozzle, and the other end of which is used to be connected to the air supply end of the air supply device;

[0012] There are two pressure-maintaining valves, which are respectively arranged in the first air inlet nozzle and the second air inlet nozzle.

[0013] Further optimization of this technical solution also includes:

[0014] A first mounting plate, disposed at the upper end of the airbag, the first mounting plate having a fixing tube, the fixing tube being located at the upper end of the first mounting plate, the first air inlet nozzle and the second air inlet nozzle both passing through the first mounting plate;

[0015] A connecting cap is sleeved on the outside of the fixing pipe, and the first air pipe and the second air pipe are fixed on the connecting cap and pass through the connecting cap.

[0016] Further optimizing the technical solution, the circumferential side wall of the connection cap has a connection hole; and further comprising:

[0017] A connecting bolt, wherein the connecting bolt has a threaded portion and a bolt head, wherein the threaded portion is located at one side of the bolt head, and the threaded portion is threadedly connected with the fixing pipe after passing through the connecting hole, and the circumferential side surface of the bolt head has an annular wiring harness groove;

[0018] A pull wire, one end of which is arranged on the bolt head, and the pull wire is wound around the wire harness groove, and the other end of the pull wire extends upward to the outside of the blast hole, and the pull wire is used to drive the connecting bolt to rotate.

[0019] Further optimization of this technical solution also includes:

[0020] A second mounting plate, disposed at the lower end of the airbag;

[0021] The upper end of the support tube is arranged on the second mounting plate, and the side wall of the support tube has a vent hole.

[0022] To further optimize the technical solution, the second mounting plate has an external thread, and the external thread is threadedly connected to the upper portion of the support tube.

[0023] Further optimization of this technical solution also includes:

[0024] A counterweight is arranged on the lower side of the airbag.

[0025] To further optimize the technical solution, the counterweight block is threadedly connected to the lower portion of the support tube, and the counterweight block is disposed on the lower side of the airbag through the support tube.

[0026] To further optimize the technical solution, the counterweight block has an inner cavity, the upper portion of the counterweight block has a through hole, the through hole is connected to the inner cavity, and the inner cavity is used to accommodate the counterweight.

[0027] Further optimization of this technical solution also includes:

[0028] A baffle is arranged inside the support tube, and when the support tube is connected to the counterweight block, the baffle covers the through hole.

[0029] The beneficial effects of the utility model are:

[0030] 1. The air supply device has an air supply end and an air pressure detection module, which can detect the pressure at the air supply end. The airbag can be inflated through the first air inlet nozzle to make it expand. After reaching the set pressure, it is preliminarily considered that the airbag is expanded and sealed with the blast hole. Then the space below the airbag is inflated through the second air inlet nozzle. The air pressure below the airbag increases, which can support the airbag. The air supply device is connected to the second air inlet nozzle through the second air pipe to detect the pressure change below the airbag. If the air pressure drops rapidly or cannot be stably increased, it proves that there is a leakage gap between the airbag and the blast hole. At this time, the airbag can continue to be inflated through the first air pipe to fully expand it.

[0031] 2. The first air pipe is connected to the first air inlet nozzle by plugging, and the second air pipe is connected to the second air inlet nozzle by plugging, so as to facilitate the disconnection of the air circuit. The pressure-maintaining valve is unidirectional and can ventilate into the airbag and below the airbag. After the air circuit is disconnected, the pressure-maintaining valve maintains the air pressure in the airbag or below the airbag. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the utility model;

[0033] Figure 2 for Figure 1 The schematic diagram of the local enlarged structure at position I in the middle;

[0034] Explanation of marks in the figure: 1. airbag; 2. first air inlet nozzle; 3. first air pipe; 4. second air inlet nozzle; 5. second air pipe; 6. pressure maintaining valve; 7. first mounting plate; 701. fixing tube; 8. connecting cap; 801. connecting hole; 9. connecting bolt; 901. threaded portion; 902. bolt head; 9021. wiring harness groove; 10. pull wire; 11. second mounting plate; 1101. external thread; 12. support tube; 1201. vent; 13. counterweight; 1301. inner cavity; 1302. through hole; 14. baffle. DETAILED DESCRIPTION

[0035] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0037] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0038] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0039] like Figure 1-2 As shown, a spacer for blasting includes: an air bag 1 for being placed in a blast hole; a first air inlet nozzle 2, arranged on the upper side of the air bag 1, one end of which is connected to the inside of the air bag 1 and is used to supply air to the air bag 1; a first air pipe 3, one end of which is connected to the first air inlet nozzle 2 by plugging, and the other end of which is used to be connected to the air supply end of the air supply device; a second air inlet nozzle 4, arranged on the upper side of the air bag 1, and the other end of which penetrates the air bag 1 and extends to the lower side of the air bag 1; a second air pipe 5, one end of which is connected to the second air inlet nozzle 4 by plugging, and the other end of which is used to be connected to the air supply end of the air supply device; and two pressure-maintaining valves 6, which are respectively arranged in the first air inlet nozzle 2 and the second air inlet nozzle 4.

[0040] When in use, an air supply device with air pressure detection and display is used to perform air supply and pressure detection. The spacer is placed in the blast hole. The air supply end of the air supply device is first connected to the first air pipe 3 to supply air to the airbag 1 to expand the airbag 1; then, the air supply end is connected to the second air pipe 5 to supply air to the space below the airbag 1. The size of the space can be estimated based on the placement position, thereby estimating parameters such as the air supply volume or time. Within a certain period of time, if the air pressure value is far lower than the budgeted value, or the air pressure drops quickly, it is judged that there is a leaking gap between the airbag 1 and the blast hole, and more gas needs to be pumped into the airbag 1 again to make it expand more fully.

[0041] After the inflation is completed, the airbag 1 is squeezed and sealed with the blast hole, and has good positioning ability. At this time, the first air pipe 3 and the second air pipe 5 are pulled upward to disconnect the plug connection between the air pipe and the air inlet nozzle. The pressure-maintaining valve 6 in the first air inlet nozzle 2 and the second air inlet nozzle 4 blocks the exhaust to the outside to achieve pressure maintenance. The pressure-maintaining valve 6 is unidirectional and can ventilate from the air supply end to the inside of the airbag 1 or below the airbag 1. When the air supply device is inflating, the pressure-maintaining valve 6 is in an open state, and pressure detection can be performed.

[0042] Furthermore, it also includes: a first mounting plate 7, which is arranged at the upper end of the airbag 1, and the first mounting plate 7 has a fixing tube 701, and the fixing tube 701 is located at the upper end of the first mounting plate 7, and the first air inlet nozzle 2 and the second air inlet nozzle 4 both pass through the first mounting plate 7; a connecting cap 8, which is sleeved on the outside of the fixing tube 701, and the first air pipe 3 and the second air pipe 5 are fixed on the connecting cap 8 and pass through the connecting cap 8.

[0043] When in use, the first mounting plate 7 is conveniently connected to the connection cap 8, so that the air inlet nozzle and the air pipe can be plugged and connected more conveniently. The upper parts of the first air inlet nozzle 2 and the second air inlet nozzle 4 are fixedly arranged on the first mounting plate 7, and the lower parts of the first air pipe 3 and the second air pipe 5 are fixedly arranged on the connection cap 8, and are through-arranged. The lower part of the first air pipe 3 is opposite to the first air inlet nozzle 2, and the lower part of the second air pipe 5 is opposite to the second air inlet nozzle 4. When the connection cap 8 is docked with the first mounting plate 7, the plug-in connection between the air inlet nozzle and the air pipe can be realized, and the connection can be disconnected when it is pulled upward with force. When pulling it upward, force can be applied to the first air pipe 3 and the second air pipe 5, or an additional rope body can be added to apply force to the connection cap 8.

[0044] Furthermore, the circumferential side wall of the connecting cap 8 has a connecting hole 801; it also includes: a connecting bolt 9, the connecting bolt 9 has a threaded portion 901 and a bolt head 902, the threaded portion 901 is located on one side of the bolt head 902, the threaded portion 901 passes through the connecting hole 801 and is threadedly connected to the fixing tube 701, and the circumferential side of the bolt head 902 has an annular harness groove 9021; a pull wire 10, one end of the pull wire 10 is arranged on the bolt head 902, and the pull wire 10 is wrapped around the harness groove 9021, and the other end of the pull wire 10 extends upward to the outside of the blast hole, and the pull wire 10 is used to drive the connecting bolt 9 to rotate.

[0045] When in use, the connecting bolt 9 can strengthen the connection strength between the connecting cap 8 and the first mounting plate 7, and the pull wire 10 can remove the connecting bolt 9. During installation, after the air pipe and the air inlet nozzle are plugged and connected, the connecting cap 8 is simultaneously sleeved on the outside of the fixed pipe 701, and the matching clearance between the two is small. After the threaded portion 901 of the connecting bolt 9 passes through the connecting hole 801, it is threadedly connected with the side wall of the fixed pipe 701. The screw structure can be used to directly drill a hole in the side wall of the fixed pipe 701 to achieve connection, or a threaded hole corresponding to the position of the connecting hole 801 can be pre-set on the side wall of the fixed pipe 701. Multiple turns of the pull wire 10 are wound in the wire harness groove, and the upper end of the pull wire 10 is located outside the blast hole; when the airbag 1 is inflated, the pull wire 10 is pulled upward, and the pull wire 10 drives the connecting bolt 9 to rotate, and finally the threaded portion 901 is disconnected from the fixed pipe 701 to achieve separation, and finally the connecting cap 8 and the air pipe can be pulled out. The setting of the connecting bolt 9 can prevent the air pipe and the air inlet nozzle from being accidentally separated. The connection is stable, and the connecting bolt 9 is driven to rotate by the pull wire 10, which makes it more convenient to apply force. This avoids the problem that the upward force direction of the existing horizontal pin connection structure is not convenient for dragging the pin horizontally when it is separated.

[0046] Furthermore, it also includes: a second mounting plate 11, which is arranged at the lower end of the airbag 1; a support tube 12, the upper end of which is arranged on the second mounting plate 11, and the side wall of the support tube 12 has a vent hole 1201.

[0047] When in use, the second mounting plate 11 is convenient for mounting the support tube 12. The support tube 12 can be selected to a desired height to meet the requirement of adjusting the length of the spacer. The side wall of the support tube 12 is provided with a vent hole 1201 to ensure that the lower part of the second air inlet nozzle 4 is connected to the space below the airbag 1. The second air inlet nozzle 4 can be located inside the support tube 12 or outside the support tube 12. The second air inlet nozzle 4 penetrates the airbag 1 from top to bottom. The part located inside the airbag 1 can be made of a flexible material and have a redundancy to facilitate the longitudinal expansion of the airbag 1. Of course, the redundancy can also be omitted, and the distance between the first mounting plate 7 and the second mounting plate 11 can be directly limited to limit the longitudinal expansion of the airbag 1 without affecting the lateral expansion.

[0048] Furthermore, the second mounting plate 11 has an external thread 1101 , and the external thread 1101 is threadedly connected to the upper portion of the support tube 12 .

[0049] When in use, the second mounting plate 11 is threadedly connected to the support tube 12 via the external thread 1101, which is convenient for disassembly and for selecting support tubes 12 of different lengths according to actual use requirements, and the threaded connection structure has a certain height adjustment capability.

[0050] Further, it also includes a counterweight 13, which is arranged at the lower side of the airbag 1. The counterweight 13 is threadedly connected to the lower part of the support tube 12, and the counterweight 13 is arranged at the lower side of the airbag 1 through the support tube 12.

[0051] When in use, the counterweight 13 is provided to facilitate the spacer to enter the blast hole and slide down quickly to the desired position.

[0052] The counterweight 13 is threadedly connected to the lower part of the support tube 12, which is convenient for assembly and disassembly, and the counterweight 13 can be used or not as needed. The upper part of the counterweight 13 can be provided with a thread, and the lower part of the support tube 12 is provided with an internal thread for threaded connection. Similarly, a latch connection or the like can also be adopted.

[0053] Furthermore, the counterweight block 13 has an inner cavity 1301, and the upper portion of the counterweight block 13 has a through hole 1302, the through hole 1302 is connected to the inner cavity 1301, and the inner cavity 1301 is used to accommodate the counterweight. It also includes: a baffle 14, which is arranged inside the support tube 12, and when the support tube 12 is connected to the counterweight block 13, the baffle 14 covers the through hole 1302.

[0054] When in use, the counterweight block 13 has an inner cavity 1301 therein, which is connected to the outside through the through hole 1302 and can be used to fill counterweights such as sand, making assembly more convenient.

[0055] After the inner cavity 1301 is filled with a counterweight, the through hole 1302 is generally placed upward, and when entering the blast hole, it is also used upward, and can be used directly. The baffle 14 is more convenient for transportation. The baffle 14 is fixedly arranged inside the support tube 12, and the position of the through hole 1302 is opposite to the inside of the support tube 12. After the support tube 12 is connected to the counterweight block 13, the baffle 14 can cover the through hole 1302 to block it and prevent the counterweight from leaking out.

[0056] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A blasting spacer, characterized in that: include: An air bag (1) for placement in a blast hole; A first air inlet nozzle (2), arranged on the upper side of the airbag (1), one end of which is in communication with the interior of the airbag (1) and is used to supply air to the airbag (1); A first air pipe (3), one end of which is plugged and connected to the first air inlet nozzle (2), and the other end of which is used to be connected to the air supply end of the air supply device; A second air inlet nozzle (4) is arranged on the upper side of the airbag (1), and the other end of the second air inlet nozzle (4) penetrates the airbag (1) and extends to the lower side of the airbag (1); A second air pipe (5), one end of which is plugged and connected to the second air inlet nozzle (4), and the other end of which is used to be connected to the air supply end of the air supply device; There are two pressure-maintaining valves (6), and the two pressure-maintaining valves (6) are respectively arranged in the first air inlet nozzle (2) and in the second air inlet nozzle (4).

2. A blasting spacer according to claim 1, characterized in that: Also includes: a first mounting plate (7) disposed at the upper end of the airbag (1), the first mounting plate (7) having a fixing tube (701), the fixing tube (701) being located at the upper end of the first mounting plate (7), the first air inlet nozzle (2) and the second air inlet nozzle (4) both passing through the first mounting plate (7); A connecting cap (8) is sleeved on the outside of the fixing tube (701); the first air pipe (3) and the second air pipe (5) are fixed on the connecting cap (8) and pass through the connecting cap (8).

3. A blasting spacer according to claim 2, characterized in that: The connecting cap (8) has a connecting hole (801) on its circumferential side wall; and further comprises: A connecting bolt (9), the connecting bolt (9) comprising a threaded portion (901) and a bolt head (902), the threaded portion (901) being located on one side of the bolt head (902), the threaded portion (901) being threadedly connected to the fixing tube (701) after passing through the connecting hole (801), and the circumferential side surface of the bolt head (902) comprising an annular wiring harness groove (9021); A pull wire (10), one end of which is arranged on the bolt head (902), and the pull wire (10) is wound around the wire harness groove (9021), and the other end of the pull wire (10) extends upward to the outside of the blast hole, and the pull wire (10) is used to drive the connecting bolt (9) to rotate.

4. A blasting spacer according to claim 3, characterized in that: Also includes: A second mounting plate (11) is arranged at the lower end of the airbag (1); A support tube (12), the upper end of which is arranged on the second mounting plate (11), and a side wall of the support tube (12) has a vent hole (1201).

5. A blasting spacer according to claim 4, characterized in that: The second mounting plate (11) has an external thread (1101), and the external thread (1101) is threadedly connected to the upper part of the support tube (12).

6. A blasting spacer according to claim 4, characterized in that: Also includes: A counterweight (13) is arranged on the lower side of the airbag (1).

7. A blasting spacer according to claim 6, characterized in that: The counterweight block (13) is threadedly connected to the lower portion of the support tube (12), and the counterweight block (13) is arranged on the lower side of the airbag (1) through the support tube (12).

8. A blasting spacer according to claim 7, characterized in that: The counterweight block (13) has an inner cavity (1301) therein, and the upper portion of the counterweight block (13) has a through hole (1302), the through hole (1302) is connected to the inner cavity (1301), and the inner cavity (1301) is used to accommodate a counterweight object.

9. A blasting spacer according to claim 8, characterized in that: Also includes: A baffle (14) is arranged inside the support tube (12); when the support tube (12) is connected to the counterweight (13), the baffle (14) covers the through hole (1302).

Images