Mechanical device applied to upward medium-length hole blasting charge hole plugging

Abstract

The utility model discloses a mechanical device applied to upward medium-length hole blasting charge hole plugging. The mechanical device comprises a top plate, a two-way threaded rod and a three-jaw seat. The upper end of the bidirectional threaded rod is rotationally connected with the top plate; the three-jaw seat comprises an internal thread connecting disc, a plurality of damping jaws and a base, a threaded hole in the middle of the internal thread connecting disc and a threaded hole in the middle of the base are opposite in rotating direction, and the internal thread connecting disc and the base are both matched with the two-way threaded rod; each damping claw comprises a first connecting rod and a second connecting rod which are hinged, the upper end of each damping claw is rotationally connected with the internal thread connecting disc, and the lower end of each damping claw is rotationally connected with the base. Through cooperation of the top plate, the two-way threaded rod and the three-jaw seat, the problems that when the water content of the inner wall of a blast hole is too high, friction force between mixed explosive and the hole wall is insufficient, and consequently explosive falls, and when an existing hole plugging device is used, excessive explosive is generated in a hole opening can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of mining blasting engineering equipment, in particular to a mechanical device for plugging upward medium-deep hole blasting with charge. Background Art

[0002] In the process of recovering thick ore deposits with high inclination angles in underground mines, the medium-deep hole blasting method is widely used. Due to the long construction period of the medium-deep hole stope, in order to ensure the integrity of the deep hole after the rock drilling operation, the upward medium-deep hole rock drilling and blasting operation method is mostly adopted. In the charging process before the upward medium-deep hole blasting, a mixed explosive charging vehicle is used for charging operations, and the mixed explosive is loaded vertically or obliquely upward into the blasthole. The mixed explosive itself has a certain viscosity. In theory, the mixed explosive after loading will be firmly attached to the inner wall of the blasthole. However, when the water content of the inner wall of the blasthole is high, the friction between the mixed explosive after loading and the inner wall of the blasthole is not enough to withstand the downward gravity of the explosive itself, resulting in the phenomenon of falling after charging, which will result in less explosives at the bottom of the hole, a high rate of large blocks after blasting, and a suspended roof formed in the stope, resulting in a waste of ore.

[0003] The traditional plugging solution is to use gun mud to fill the hole, but it is time-consuming and laborious in the actual construction process. When the gun mud is just filled into the blast hole, the mixed explosive falls from the blast hole under the action of gravity, making it difficult to achieve the ideal plugging effect. In order to solve the above problems, people began to use wedge-shaped expansion pin pluggers to plug the hole, but in the actual construction process, it can only achieve full-hole charging plugging, and the hole mouth is too much mixed explosive, resulting in a waste of blasting energy and explosives. Utility Model Content

[0004] The utility model provides a mechanical device for plugging upward medium-deep hole blasting with explosives, and aims to solve the problem of excessive explosives at the hole mouth during the use of the existing hole plugging device.

[0005] The technical solution of this utility model is as follows:

[0006] A mechanical device for plugging upward medium-deep hole blasting with explosives, comprising a top plate, a bidirectional threaded rod and a three-claw seat; the upper end of the bidirectional threaded rod is rotatably connected to the top plate; the three-claw seat comprises an internally threaded connecting disk, a plurality of damping claws and a base, the threaded hole in the middle of the internally threaded connecting disk and the threaded hole in the middle of the base have opposite rotation directions, and both are matched with the bidirectional threaded rod; each of the damping claws comprises a hinged first connecting rod and a second connecting rod, the upper end of the damping claw is rotatably connected to the internally threaded connecting disk, and the lower end is rotatably connected to the base.

[0007] As a further improvement, a top bearing is fixed on the top plate, and the top bearing is connected to the upper end of the bidirectional threaded rod.

[0008] As a further improvement, a second detonator hole is opened on the top plate.

[0009] As a further improvement, the bidirectional threaded rod is provided with a plurality of spacing holes, and the spacing holes are used for inserting positioning pins.

[0010] As a further improvement, a first detonator hole is provided on the base.

[0011] As a further improvement, a rotating handle is connected to the lower end of the bidirectional threaded rod.

[0012] Compared with the prior art, the utility model has the following positive effects:

[0013] (1) The distance rod is used in conjunction with the top plate to adjust the distance between the mixed explosive and the hole mouth, reduce the amount of explosives at the hole mouth, and reduce the waste of blasting energy.

[0014] (2) The distance rod is used in conjunction with the three-claw seat. The damping claws on the three-claw seat expand toward the surrounding hole wall, increasing the pressure on the contact surface and thereby increasing the friction between the damping claws and the hole wall. In this way, the three-claw seat can be securely installed at the hole mouth, thereby locking the mixed explosive in the hole and preventing it from falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the overall structural diagram of the hole plugging device of the utility model;

[0016] Figure 2 This is a schematic diagram of the distance rod of the utility model;

[0017] Figure 3 This is a schematic diagram of the top plate of the utility model;

[0018] Figure 4 This is a schematic diagram of the three-claw seat of the utility model;

[0019] Figure 5 This is a schematic diagram of the application of the hole plugging device of the utility model.

[0020] In the figure, 1. distance rod; 11. bidirectional threaded rod; 12. distance hole; 13. positioning pin; 14. turning handle; 2. top plate; 21. top bearing; 22. second detonator hole; 3. three-claw seat; 31. damping claw; 32. base; 33. internal thread connecting plate; 34. rod sleeve; 35. first detonator hole; 36. damping bearing; 37. pin shaft; 4. rock drilling hole wall; 5. mixed explosives; 6. digital electronic detonator. DETAILED DESCRIPTION

[0021] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments.

[0022] like Figure 1 , an embodiment of a mechanical device for plugging holes with explosives in upward medium-deep hole blasting, includes a distance rod 1, a top plate 2 and a three-claw seat 3.

[0023] The distance rod 1 comprises a bidirectional threaded rod 11 , on the rod body of which are provided two threads with equal helix angles and opposite rotation directions.

[0024] A groove is provided at the center of the top plate 2 , in which a top bearing 21 is fixed. A second detonator hole 22 is provided on the top plate 2 . The end of the bidirectional threaded rod 11 is a smooth round rod, and its upper end is connected to the top plate 2 via the top bearing 21 .

[0025] The three-claw seat 3 includes three groups of damping claws 31, an internal threaded connecting plate 33 and a base 32; the damping claw 31 includes a first connecting rod and a second connecting rod whose inner ends are hinged to each other through a rotating shaft; the upper end of the damping claw 31 is rotatably connected to the internal threaded connecting plate 33, and the lower end is rotatably connected to the base 32, and its rotating shaft is composed of a damping bearing 36 and a pin shaft 37 installed in the center hole of the damping bearing 36; a first detonator hole 35 is opened on the base 32; a rod sleeve 34 is provided in the center of the base 32, and the rod sleeve 34 is provided with an internal thread, and the base 32 is connected to the bidirectional threaded rod 11 through the internal thread on the rod sleeve 34.

[0026] The internal threads of the rod sleeve 34 and the internal threads on the internal thread connection plate 33 are in opposite directions, and both are matched with the bidirectional threaded rod 11. Since the base 32 is clamped in the hole, its position is fixed. When the bidirectional threaded rod 11 is rotated and pushed into the hole, the internal thread connection plate 33 moves toward the base 32, thereby reducing the distance between the internal thread connection plate 33 and the base 32, and then the damping claw 31 expands toward the rock drilling hole wall 4.

[0027] As a further improvement, the bidirectional threaded rod 11 is provided with a plurality of equally spaced spacing holes 12 with a spacing of 10 cm; positioning pins 13 can be inserted into the spacing holes 12 to limit the extreme position of the threaded connection plate 33 .

[0028] As a further improvement, a rotating handle 14 is fixedly connected to the lower end of the bidirectional threaded rod 11 , and rotating the rotating handle 14 will drive the bidirectional threaded rod 11 to rotate.

[0029] When in use, according to the distance from the lower end surface of the mixed explosive 5 filled in the blast hole to the hole mouth, adjust the internal thread connection plate 33 to a suitable position, insert the positioning pin 13 into a distance hole 12 below the internal thread connection plate 33, and define the limit position of the internal thread connection plate 33. Fix the top bearing 21 in the groove of the top plate 2, and connect the smooth round rod at the upper end of the bidirectional threaded rod 11 to the top bearing 21. Then insert the digital electronic detonator 6 into the hole through the second detonator hole 22 and the first detonator hole 35; after the mixed explosive 5 is loaded, insert the hole plugging device described in the utility model into the blast hole, and the base 32 is clamped at the hole mouth. Since the position of the base 32 is fixed, the rotating handle 14 pushes the bidirectional threaded rod 11 inward, and the internal threaded connecting plate 33 approaches the base 32, so that the three groups of damping claws 31 expand and fit against the rock drilling hole wall 4, increasing the pressure on the contact surface between the device and the rock drilling hole wall 4, and then increasing the friction between the damping claws 31 and the rock drilling hole wall 4. In this way, the three-claw seat 3 can be firmly installed at the hole mouth. At the same time, the top plate 2 will move upward to compress the explosives, thereby locking the mixed explosives 5 in the hole to prevent them from falling.

[0030] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. The scope of the present invention is defined by the claims rather than the above description.

Claims

1. A mechanical device for plugging upward medium-deep hole blasting with explosives, comprising a top plate (2), characterized in that: It also includes a bidirectional threaded rod (11) and a three-claw seat (3); The upper end of the bidirectional threaded rod (11) is rotatably connected to the top plate (2); The three-claw seat (3) comprises an internally threaded connection plate (33), a plurality of damping claws (31) and a base (32); the threaded hole in the middle of the internally threaded connection plate (33) and the threaded hole in the middle of the base (32) have opposite rotation directions, and both are matched with the bidirectional threaded rod (11); Each of the damping claws (31) comprises a hinged first connecting rod and a second connecting rod, the upper end of the damping claw (31) is rotatably connected to the internal thread connection plate (33), and the lower end is rotatably connected to the base (32).

2. The mechanical device for plugging upward medium-deep hole blasting according to claim 1, characterized in that: A top bearing (21) is fixed on the top plate (2), and the top bearing (21) is connected to the upper end of the bidirectional threaded rod (11).

3. The mechanical device for plugging upward medium-deep hole blasting according to claim 1, characterized in that: The top plate (2) is provided with a second detonator hole (22).

4. The mechanical device for plugging upward medium-deep hole blasting according to claim 1, characterized in that: The bidirectional threaded rod (11) is provided with a plurality of spacing holes (12), and the spacing holes (12) are used for inserting positioning pins (13).

5. The mechanical device for plugging upward medium-deep hole blasting according to claim 1, characterized in that: The base (32) is provided with a first detonator hole (35).

6. The mechanical device for plugging upward medium-deep hole blasting according to claim 1, characterized in that: The lower end of the bidirectional threaded rod (11) is connected to a rotating handle (14).

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