Downhole upward hole bottom primer

Abstract

The utility model discloses an underground upward hole bottom detonating tool which comprises a top cap, a charging bin is arranged at the lower end of the top cap, and the charging bin is connected with the top cap through threads. The connecting rod is arranged in the middle of the lower end of the charging bin, a moving ring is arranged outside the connecting rod and is in sliding fit with the connecting rod, four mounting lug plates are arranged outside the moving ring, and the mounting lug plates are annularly distributed at equal intervals; the fixing rod is arranged in the mounting lug plate, the fixing rod is fixedly connected with the mounting lug plate, a supporting rod is arranged in the middle of the exterior of the fixing rod, and the lower end of the supporting rod extends to the position below the mounting lug plate. And a lead led out from the primer is easy to bend.

Description

Technical Field

[0001] The utility model relates to the technical field of underground blasting, in particular to an underground upward hole bottom detonator. Background Art

[0002] The detonator is a key device used to detonate explosives in blasting operations. It usually contains one or more detonating elements, which are connected to the explosives and are used to quickly detonate the explosives when receiving the detonation signal. The detonator is generally composed of detonating elements, explosives, shells, connecting devices and other structures. When the detonation signal is transmitted to the detonating element, the detonating element will quickly detonate, generating high-temperature and high-pressure gases. These gases quickly expand and impact the explosives, causing the explosives to explode and generate a large amount of energy and shock waves. In underground operations, upward-pointing bottom-of-hole detonators are usually used.

[0003] For example, the Chinese patent "Downhole Upward Bottom Detonator" with announcement number CN216348124U includes a top cap and a charging bin, wherein the top cap is located at the top of the charging bin and is detachably connected to the charging bin, and a detonation space is formed between the interior of the top cap and the charging bin; a detonator mounting groove is provided in the charging bin, and the detonator mounting groove is communicated with the detonation space, and a lead hole communicated with the detonation space is provided on the bottom surface of the charging bin; a plurality of elastic tail wings are circumferentially arranged at the bottom end of the charging bin, and the elastic tail wings are inclinedly arranged, and the bottom end of the elastic tail wings is located on the outside of the charging bin, and a connector is provided at the center position of the bottom end of the charging bin, and the diameter of the connector is smaller than the diameter of the charging bin; the top end of the elastic tail wing is connected to the connector, so that the top end of the elastic tail wing is located on the inner side of the charging bin, and a fixing ring is sleeved on the connector, and the elastic tail wing is fixedly connected to the fixing ring.

[0004] Although the above-mentioned prior art can realize underground blasting, in actual use, on the one hand, the detonator is easy to fall off from the upward hole. When the detonator is installed in the upward holes of different diameters, the detonator needs to be fixed separately, resulting in the need to fix the detonator when facing the upward holes of different diameters, thereby reducing the adaptability of the detonator. On the other hand, the lead wire led out of the detonator is easy to bend. When connecting the lead wire, the lead wire needs to be pulled out of the charging bin, resulting in the lead wire being easy to bend at the lead wire mouth, thereby affecting the connectivity of the lead wire. Therefore, it does not meet the existing needs. In this regard, we have proposed an underground upward hole bottom detonator. Utility Model Content

[0005] The utility model aims to provide an underground upward hole bottom detonator to solve the problems in the above background technology that the detonator is easy to fall off from the upward hole and the lead wire led out of the detonator is easy to bend.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an underground upward hole bottom detonator, comprising a top cap, a charge bin is arranged at the lower end of the top cap, and the charge bin is connected to the top cap by threads; and further comprising:

[0007] A connecting rod is arranged at the middle position of the lower end of the charging bin, a moving ring is arranged outside the connecting rod, and the moving ring is slidably matched with the connecting rod, and four mounting ear plates are arranged outside the moving ring, and the mounting ear plates are equidistantly distributed in a ring shape;

[0008] A fixing rod is arranged inside the mounting ear plate and is fixedly connected to the mounting ear plate. A supporting rod is arranged at a middle position outside the fixing rod, and the lower end of the supporting rod extends to below the mounting ear plate.

[0009] Preferably, a torsion spring is provided on the outside of the fixing rod between the mounting ear plate and the support rod, and the torsion spring is fixedly connected to the mounting ear plate and the support rod respectively.

[0010] Preferably, a bolt is provided on the outside of the movable ring between the mounting ear plates, and the bolt is connected to the movable ring through a thread, and the other end of the bolt extends to the inside of the movable ring.

[0011] Preferably, a rubber pad is provided at one end of the bolt located inside the movable ring, and the rubber pad is connected to the bolt by glue.

[0012] Preferably, an explosive groove is provided at a middle position inside the charge bin, and a detonator groove is provided inside the charge bin located outside the explosive groove.

[0013] Preferably, lead holes are provided on both sides of the lower end of the charging bin, a protective tube is provided inside the lead hole, one end of the protective tube is connected to the detonator groove, and the other end of the protective tube extends to the bottom of the charging bin, and annular grooves are provided inside the upper and lower ends of the protective tube, and the annular grooves are equidistantly distributed.

[0014] Preferably, a rubber ring is provided on the outer side of the top cap, and the rubber ring is connected to the top cap by glue.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model can fix the detonator in the upward hole of different apertures by means of the support rod and the torsion spring. Before installing the detonator, the operator grasps the support rod to contract the support rod and compress the torsion spring. At this time, the detonator is placed in the upward hole. After the detonator enters the upward hole, the torsion spring is reset. The force generated during the resetting process of the torsion spring drives the support rod to expand until the bottom end of the support rod contacts the upward hole, and the torsion spring is still in a compressed state. The friction between the support rod and the wall of the upward hole and the cooperation of the torsion spring enable the top cap and the charge chamber to be fixed in the upward holes of different apertures, thereby improving the adaptability of the detonator to the upward holes of different apertures.

[0017] 2. The utility model can protect the lead wire from bending through the rubber pad and the annular groove. When connecting the lead wire, first pass the lead wire through the protective tube, and connect one end of the lead wire to the detonator. At this time, when the lead wire is bent, the lead wire first contacts the protective tube, and the protective tube is bent at the same time. When the protective tube is bent, the annular groove arranged on the protective tube is deformed to protect the lead wire inside the protective tube, and prevent the lead wire from being squeezed and worn when the lead wire is bent, thereby helping to improve the connectivity of the lead wire.

[0018] 3. The utility model can adjust the position of the support rod through the moving ring and the bolt. When facing upward holes of different depths, the bolt is rotated at this time to make the bolt move outward on the moving ring through the external thread until the rubber pad at the other end of the bolt is separated from the connecting rod. At this time, the position of the moving ring is adjusted until the moving ring and the support rod are adjusted to a suitable position. At this time, the bolt is rotated again to make the bolt move inward on the moving ring through the external thread until the rubber pad at the other end of the bolt gradually approaches the connecting rod and squeezes the connecting rod to fix the moving ring. At this time, the detonator is placed in the upward hole to avoid the situation where the detonator is not fixed in an appropriate position, thereby improving the blasting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the internal structure of the utility model;

[0020] Figure 2 It is a partial enlarged view of the fixing structure of the utility model;

[0021] Figure 3 It is a schematic diagram of the external structure of the utility model;

[0022] Figure 4 For the utility model Figure 1 A partial enlarged view of area A.

[0023] In the figure: 1. top cap; 2. charge chamber; 3. connecting rod; 4. movable ring; 5. mounting ear plate; 6. fixing rod; 7. torsion spring; 8. support rod; 9. rubber ring; 10. explosive trough; 11. detonator trough; 12. protective tube; 13. bolt; 14. rubber pad; 15. annular groove; 16. lead hole. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] See also Figure 1-4 The utility model provides an embodiment: a downhole upward hole bottom detonator, comprising a top cap 1, a charge bin 2 is provided at the lower end of the top cap 1, and the charge bin 2 is connected to the top cap 1 by threads; and further comprising:

[0026] A connecting rod 3 is arranged at the middle position of the lower end of the charging bin 2, a moving ring 4 is arranged outside the connecting rod 3, and the moving ring 4 is slidably matched with the connecting rod 3, and four mounting ear plates 5 are arranged outside the moving ring 4, and the mounting ear plates 5 are equidistantly distributed in a ring shape;

[0027] A fixing rod 6 is arranged inside the mounting ear plate 5 , and the fixing rod 6 is fixedly connected to the mounting ear plate 5 . A support rod 8 is arranged at a middle position outside the fixing rod 6 , and the lower end of the support rod 8 extends to the bottom of the mounting ear plate 5 .

[0028] When in use, before installing the detonator, the operator grasps the support rod 8 to shrink the support rod 8 while the torsion spring 7 is in a compressed state. At this time, the detonator is placed in the upward hole. After the detonator enters the upward hole, the torsion spring 7 is reset. The force generated during the resetting process of the torsion spring 7 drives the support rod 8 to expand until the bottom end of the support rod 8 contacts the wall of the upward hole, and the torsion spring 7 is still in a compressed state. Through the friction between the support rod 8 and the wall of the upward hole and the cooperation of the torsion spring 7, the top cap 1 and the charging chamber 2 can be fixed in the upward holes of different apertures.

[0029] See also Figure 1 and Figure 2 A torsion spring 7 is arranged outside the fixing rod 6 between the mounting ear plate 5 and the support rod 8, and the torsion spring 7 is fixedly connected to the mounting ear plate 5 and the support rod 8 respectively, so that the support rod 8 can be fixed in the upward hole through the force generated by the torsion spring 7 during the resetting process.

[0030] See also Figure 2A bolt 13 is provided on the outside of the movable ring 4 between the mounting ear plates 5, and the bolt 13 is threadedly connected to the movable ring 4, and the other end of the bolt 13 extends to the inside of the movable ring 4, so that the position of the movable ring 4 can be adjusted and fixed by the bolt 13.

[0031] See also Figure 2 A rubber pad 14 is provided at one end of the bolt 13 located inside the moving ring 4 , and the rubber pad 14 is connected to the bolt 13 by glue, so as to increase the friction between the bolt 13 and the connecting rod 3 through the rubber pad 14 .

[0032] See also Figure 1 An explosive groove 10 is provided at the middle position inside the charge bin 2, and a detonator groove 11 is provided inside the charge bin 2 outside the explosive groove 10, so as to form a partition between the explosive groove 10 and the detonator groove 11, thereby avoiding accidental explosion of the detonator.

[0033] See also Figure 1 and Figure 4 , both sides of the lower end of the charging bin 2 are provided with lead holes 16, and a protection tube 12 is provided inside the lead hole 16. One end of the protection tube 12 is connected to the detonator groove 11, and the other end of the protection tube 12 extends to the bottom of the charging bin 2. Annular grooves 15 are provided inside the upper and lower ends of the protection tube 12, and the annular grooves 15 are equidistantly distributed, so as to protect the bent lead through the protection tube 12.

[0034] See also Figure 1 A rubber ring 9 is arranged on the outside of the top cap 1, and the rubber ring 9 is connected to the top cap 1 by glue, so as to increase the friction between the top cap 1 and the upward hole through the rubber ring 9.

[0035] Working principle: When connecting the lead, first pass the lead through the protective tube 12, and connect one end of the lead to the detonator. At this time, when the lead is bent, the lead first contacts the protective tube 12, and the protective tube 12 is bent at the same time. When the protective tube 12 is bent, the annular groove 15 provided on the protective tube 12 is deformed to protect the lead located inside the protective tube 12. When facing upward holes of different depths, at this time, turn the bolt 13 so that the bolt 13 moves outward on the movable ring 4 through the external thread until the rubber pad 14 at the other end of the bolt 13 is separated from the connecting rod 3. At this time, adjust the position of the movable ring 4 until the movable ring 4 together with the support rod 8 is adjusted to a suitable position. At this time, turn the bolt 13 again so that the bolt 13 moves inward on the movable ring 4 through the external thread until the rubber pad 14 at the other end of the bolt 13 gradually approaches the connecting rod 3 and squeezes the connecting rod 3 to fix the movable ring 4. At this time, place the detonator in the upward hole.

[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An underground upward hole-bottom detonator, comprising a top cap (1), a charge bin (2) being arranged at the lower end of the top cap (1), and the charge bin (2) and the top cap (1) being connected by threads; Features: Also includes: A connecting rod (3) is arranged at the middle position of the lower end of the charge bin (2); a movable ring (4) is arranged outside the connecting rod (3), and the movable ring (4) and the connecting rod (3) are slidably matched; four mounting ear plates (5) are arranged outside the movable ring (4), and the mounting ear plates (5) are equidistantly distributed in a ring shape; A fixing rod (6) is arranged inside the mounting ear plate (5), and the fixing rod (6) is fixedly connected to the mounting ear plate (5); a supporting rod (8) is arranged at a middle position outside the fixing rod (6), and the lower end of the supporting rod (8) extends to the bottom of the mounting ear plate (5).

2. The underground upward hole bottom detonator according to claim 1, characterized in that: The fixing rod (6) is located between the mounting ear plate (5) and the support rod (8) and is provided with a torsion spring (7) outside, and the torsion spring (7) is respectively fixedly connected to the mounting ear plate (5) and the support rod (8).

3. The underground upward hole bottom detonator according to claim 2, characterized in that: A bolt (13) is provided on the outside of the movable ring (4) between the mounting ear plates (5), and the bolt (13) is connected to the movable ring (4) through a thread, and the other end of the bolt (13) extends into the interior of the movable ring (4).

4. The underground upward hole bottom detonator according to claim 3, characterized in that: A rubber pad (14) is provided at one end of the bolt (13) located inside the moving ring (4), and the rubber pad (14) and the bolt (13) are connected by glue.

5. The underground upward hole bottom detonator according to claim 4, characterized in that: An explosive groove (10) is arranged at a middle position inside the charge bin (2), and a detonator groove (11) is arranged inside the charge bin (2) outside the explosive groove (10).

6. The underground upward hole bottom detonator according to claim 5, characterized in that: Both sides of the lower end of the charge bin (2) are provided with lead holes (16), a protection tube (12) is provided inside the lead hole (16), one end of the protection tube (12) is connected to the detonator groove (11), and the other end of the protection tube (12) extends to the bottom of the charge bin (2), and annular grooves (15) are provided inside the upper and lower ends of the protection tube (12), and the annular grooves (15) are equidistantly distributed.

7. The underground upward hole bottom detonator according to claim 1, characterized in that: A rubber ring (9) is arranged on the outer side of the top cap (1), and the rubber ring (9) and the top cap (1) are connected by glue.

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