Blast hole plugging device

Abstract

The invention discloses a blast hole plugging device, and particularly relates to the field of blasting auxiliary devices. Comprising a torsion bar, the torsion bar is internally provided with a one-way circulation structure, and the one-way circulation structure can allow a detonating cord to pass through; a first wire hole for the torsion bar to pass through is formed in the lower pressing cylinder; the rotating body is in threaded connection with the torsion bar, the rotating body is located in the lower pressing cylinder, and a second wire guide hole for a detonating wire to pass through is formed in the rotating body; and the locking structure is used for abutting against and locking the lower pressing cylinder. By the adoption of the technical scheme, the problem that an existing plugging material is poor in blasting effect during blasting is solved, gas overflow in the blasting process can be effectively prevented, the punching phenomenon is prevented, and the safety and effect of blasting operation can be greatly improved.

Description

Technical Field

[0001] The invention relates to the field of blasting auxiliary devices, and in particular to a blasthole sealing device. Background Art

[0002] When blasting, it is necessary to seal the blastholes filled with explosives. In existing studies, the sealing quality of the blastholes has little effect on the peak value of the shock wave generated after the explosion, but has a significant effect on the rate of decrease of the pressure of the explosive gas generated after the explosion, as well as the duration of action on the blasted objects such as rocks. Ensuring the high temperature and high pressure state in the blasthole can effectively increase the completeness of the chemical reaction of the explosives, so that the explosion energy can be fully released. At the same time, it can further form an air wedge effect to accelerate the development process of cracks caused by the explosion stress wave, improve the destructive effect of the blasting, reduce the throwing distance of the splash, and reduce the intensity of the air shock wave. Therefore, the sealing quality of the blasthole is one of the most important factors restricting the blasting effect. At present, the sealing operation of the blasting blastholes at the construction site mainly depends on the construction experience of the operators. The sealing method is relatively single, the sealing length does not change much, and the sealing materials are mostly locally sourced. Generally, (including but not limited to): special blasthole plugging agent, crushed slag stone, loess, quick-setting cement, woven bags, rubber plugs, etc. are selected.

[0003] However, when the above-mentioned plugging materials are used to plug the blastholes, the plugging effect is often far from the expected effect due to the limitations of the plugging materials themselves. The main reasons for the difference are: the plugging distance is too short, which cannot effectively avoid the occurrence of punching, resulting in poor blasting effect, increased blasting cost, and potential safety hazards in the safe area; the plugging distance is too long, which will occupy the blasthole charging space, reduce the utilization rate of the blasthole, increase the drilling cost, and may also lead to the failure to achieve the designed blasting effect. Therefore, it is urgent to develop a blasthole plugging device that is easy to transport, easy to assemble, simple to operate, low cost, and has efficient plugging ability. Summary of the invention

[0004] The present invention aims to provide a blasthole plugging device, which solves the problem that the existing plugging materials have poor blasting effect during blasting.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows: a blasthole sealing device, comprising:

[0006] A torsion bar, wherein a one-way flow structure is provided in the torsion bar, and the one-way flow structure can allow the detonating wire to pass through;

[0007] A lower pressing cylinder, wherein the lower pressing cylinder is provided with a first wire hole for the torsion bar to pass through;

[0008] A rotating body, the rotating body is threadedly connected to the torsion bar, the rotating body is located in the lower pressure cylinder, and a second wire hole for the detonating wire to pass through is opened on the rotating body;

[0009] A locking structure is used to lock the pressing cylinder tightly.

[0010] Furthermore, the torsion bar is composed of two semi-cylinders, and the upper and lower ends of the two semi-cylinders are integrally formed with connecting columns, and the two connecting columns located on the same side are commonly provided with external threads, and the two connecting columns located on the upper side are commonly threadedly connected with a cap, and the cap (4) is provided with a third wire hole for the detonating wire to pass through.

[0011] Through the above arrangement, the torsion bar adopts two semi-cylindrical structures, which makes the device easy to disassemble and can improve work efficiency.

[0012] Furthermore, the one-way flow structure is a Tesla valve structure, and the Tesla valve structure is opened on opposite sides of two semi-cylinders.

[0013] Through the above arrangement, with the help of the Tesla valve structure, the one-way flow of gas can be ensured, the rate of decrease of the pressure of the explosive gas can be reduced, and the detonating cord can also pass through.

[0014] Furthermore, any one of the semi-cylinders is provided with no less than three non-collinear limiting rods, and the other semi-cylinder is provided with limiting holes matching with the corresponding limiting rods.

[0015] Through the above-mentioned setting, with the help of three limit rods, the two semi-cylinders can be quickly positioned and installed, which effectively ensures the position installation accuracy of the two semi-cylinders, ensures the transmission effect of the torsional torque in the subsequent locking process, ensures the locking effect of the device, and improves the sealing ability of the equipment.

[0016] Furthermore, the locking structure includes:

[0017] A plurality of locking notches, wherein the plurality of locking notches are circumferentially distributed on the side wall of the lower pressure cylinder, and all the locking notches are arranged in a staggered manner in height;

[0018] A plurality of locking pins, wherein the plurality of locking pins are slidably connected in corresponding locking notches, and each of the locking pins is located on the motion trajectory of the rotating body;

[0019] A rotary propulsion structure is arranged at the bottom of the rotating body, and the rotary propulsion mechanism can push the locking pin out of the pressing cylinder and insert it into the inner wall of the blast hole.

[0020] Through the above-mentioned arrangement, with the help of the rotary propulsion structure, the locking pin can be pushed out of the locking notch and inserted into the inner wall of the blast hole during the downward movement of the rotating body, so that the position of the device in the blast hole remains unchanged, thereby improving the stability of the working process of the device.

[0021] Furthermore, the lower pressure cylinder is composed of an upper connecting member and a lower connecting member, the upper connecting member is threadedly connected to the lower connecting member, the lower connecting member is made of elastic material, a plurality of openings are opened on the lower connecting member, a plurality of flanges located between adjacent openings are symmetrically provided on the lower inner wall of the lower pressure cylinder, a lower pressure block is provided on the flange, the lower pressure block is slidably connected in the lower pressure cylinder, and the lower pressure block is located on the motion trajectory of the rotating propulsion structure.

[0022] Through the above arrangement, the rotary propulsion structure can push the lower connecting piece at the opening to move outward by pressing the card block and the flange, thereby locking and positioning the lower connecting piece with the help of the card block and the lower connecting piece, further improving the stability of the device during operation.

[0023] Furthermore, the rotating body is composed of a first rotating block and a second rotating block, and the side walls of the first rotating block and the second rotating block are both provided with push surfaces for pushing the locking pin to move, the push surfaces on the first rotating block and the second rotating block are not colinear, the first rotating block and the second rotating block are distributed up and down, the first rotating block is provided with a threaded hole threadedly connected to the torsion bar, and the second wire hole is opened in the center of the second rotating block.

[0024] Through the above arrangement, the torsion bar can drive the rotating body to rotate, so that the locking pin can be pushed into the inner wall of the blast hole by means of the push surfaces on the first rotating block and the second rotating block, thereby realizing the locking positioning of the device.

[0025] Furthermore, the sealing method of the sealing device is as follows:

[0026] The sealing device is placed in the blast hole. When the sealing device touches the bottom, the axial positive pressure is transmitted through the torsion bar. The torsion bar drives the rotating body to move in the direction of touching the bottom. After the rotating body contacts the downward pressing block, the rotating body can transmit the positive pressure to the downward pressing block. When the combined force of the positive pressure and gravity is greater than the supporting force provided by the flange, the downward pressing block moves in the direction of touching the bottom, forcing the lower connecting piece to expand outward, increasing the circumferential pressure on the blast hole wall, and completing the locking.

[0027] When the lower pressure cylinder is locked, the torque rotating around the axial direction is transmitted through the torsion bar, and the torsional effect is transmitted to the rotating body, forcing the rotating body to rotate around the axis. At the same time, the torsional moment is converted into the radial feed force of the locking pin, forcing the locking pin to be pushed into the wall of the blast hole, completing the secondary locking and sealing operation of the blast hole.

[0028] Compared with the prior art, this solution has the following beneficial effects:

[0029] This solution provides a blasthole sealing device,

[0030] This plugging device has the advantages of being disassembled, easy to transport, simple to assemble, simple to operate and low cost. After the blasting operation, the undamaged parts can be recovered, and then the damaged parts of the plugged parts can be replaced for reuse. It is suitable for plugging operations of blastholes at most inclination angles and has a wide range of uses. This solution not only reserves a channel for the detonating wire through the built-in Tesla valve structure, but also ensures the plugging effect of the blasthole. The double locking effect can be achieved through the down-pressure cylinder, rotating body, down-pressure block and locking pin, which greatly improves the ability to resist the instantaneous high pressure and high load during the blasting process, can effectively prevent the occurrence of punching, effectively prolong the escape time of high-pressure gas, and greatly improve the safety and blasting effect of the blasting operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a cross-sectional view of a blasthole plugging device of Example 1;

[0032] Figure 2 is a schematic structural diagram of the semi-cylinder in Example 1;

[0033] Figure 3 is a bottom view of the rotating body in Example 1;

[0034] Figure 4 is a cross-sectional view of the lower pressing cylinder in Example 1;

[0035] Figure 5 is a schematic structural diagram of the upper connecting member in Example 1;

[0036] Figure 6 is a schematic structural diagram of the lower connecting member in Example 1;

[0037] Figure 7 is a schematic structural diagram of the rotating body in Example 1;

[0038] Figure 8 is a top view of the rotating body in Example 1;

[0039] Fig. 9 It is a schematic diagram of the structure of the semi-cylinder in Example 2. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below through specific embodiments:

[0041] The figure marks in the drawings of the specification include: torsion bar 1, semi-cylinder 2, limit rod 3, cover cap 4, Tesla valve structure 5, lower pressure cylinder 6, upper connecting piece 7, upper connecting piece 8, flange 9, lower pressure block 10, rotating body 11, locking notch 12, locking pin 13, rotary propulsion structure 14, blast hole 15, first rotating body 16, second rotating body 17, push surface 18.

[0042] Example 1

[0043] like Figures 1 to 8 As shown, a blasthole sealing device comprises:

[0044] Torsion bar 1, a one-way flow structure is provided inside the torsion bar 1, and the one-way flow structure can allow the detonating wire to pass through. In this embodiment, the torsion bar 1 is composed of two semi-cylinders 2 that are axially symmetrically split, and three non-collinear limit rods 3 are provided on any semi-cylinder 2, and a limit hole that matches the corresponding limit rod 3 is provided on the other semi-cylinder 2. With the help of the three limit rods 3, the two semi-cylinders 2 are easily connected and positioned, which effectively ensures the position installation accuracy of the two semi-cylinders 2, ensures the transmission effect of the torsional torque in the subsequent locking process, ensures the locking effect of the device, and improves the blocking ability of the equipment. The upper and lower ends of the two semi-cylinders 2 are integrally formed with connecting columns, and the two connecting columns on the same side are jointly provided with continuous external threads, and the two connecting columns on the upper side are jointly threaded with a cap 4, and the cap 4 is provided with a third wire hole for the detonating wire to pass through. At the same time, the one-way flow structure is a Tesla valve structure 5, which is opened on the opposite side of the two semi-cylinders 2. With the help of the Tesla valve structure 5, not only a channel is reserved for the detonating wire, but also the blocking effect of the blast hole 15 is guaranteed. In this embodiment, the Tesla structure adopts a non-left-right symmetrical layout structure. The Tesla valve structure 5 is a special spatial structure that uses the blocking effect generated by gas reflux to form a valve body structure that can only conduct in one direction.

[0045] The lower pressure cylinder 6 is composed of an upper connecting member 87 and a lower connecting member threadedly connected to the upper connecting member 87, and the lower connecting member is made of elastic material. A first wire hole for the torsion bar 1 to pass through is provided at the center of the upper surface of the upper connecting member 87, and the first wire hole can allow two connecting columns located on the lower side to pass through. In this embodiment, flanges 9 are symmetrically provided on the lower inner wall of the lower connecting member, and a lower pressure block 10 is provided on the flange 9. The lower pressure block 10 is slidably connected in the lower pressure cylinder 6 and is located below the rotating body 11. The lower pressure block 10 is located on the motion trajectory of the rotating propulsion structure 14. When no additional axial pressure is applied to the device, the flange 9 structure can bear the support capacity of the lower pressure block 10. When the applied axial pressure is greater than the critical value, the pressing block 10 moves downward under the push of the axial pressure. At this time, the flange 9 will drive the lower side of the lower connecting piece to expand outward under the action of the pressing block 10, so that the lower connecting piece contacts the inner wall of the blast hole 15. This process is a one-time pressing and locking process, which can not only ensure that the device is fully locked in the blast hole 15, but also ensure the reliability and airtightness of the sealing.

[0046] Rotating body 11, rotating body 11 is composed of a first rotating block 16 and a second rotating block 17 which are distributed up and down, and a push surface 18 for pushing the locking pin to move is provided on the side walls of the first rotating block 16 and the second rotating block 17, and the push surfaces 18 on the first rotating block 16 and the second rotating block 17 are not colinear. A threaded hole is provided on the first rotating block 16 for threaded connection with the torsion bar 1, and the threaded hole is threadedly connected with the connecting column at the bottom of the torsion bar 1. Rotating body 11 is located in the lower pressure cylinder 6, and a second wire hole is provided in the center of the second rotating block 17 for the detonating wire to pass through, and the second wire hole is connected with the threaded hole.

[0047] The locking structure is used to lock the lower pressing cylinder 6. The locking structure includes:

[0048] Four locking notches 12 are circumferentially and equidistantly distributed on the side wall of the lower pressing cylinder 6 . All the locking notches 12 are connected to the interior of the lower pressing cylinder 6 and are arranged in a staggered manner.

[0049] Four locking pins 13 are slidably connected in corresponding locking notches 12 , respectively. The end of each locking pin 13 adopts a wedge-shaped structure, which facilitates the locking pin 13 to be inserted into the inner wall of the blast hole 15 .

[0050] The rotary propulsion structure 14 includes two radially arranged and spiral structures. The rotary propulsion structure 14 is arranged at the bottom of the rotating body 11. The two radially arranged rotary propulsion structures 14 are rotationally symmetrical geometric bodies of their smallest circumscribed cylindrical axis, so that the rotary propulsion mechanism can push the locking pin 13 out of the pressure cylinder 6 and insert it into the inner wall of the blast hole 15.

[0051] The sealing method of the sealing device is as follows:

[0052] First, the plugging device is placed in the blast hole 15. When the plugging device touches the bottom, the axial positive pressure is transmitted through the torsion bar 1. The torsion bar 1 drives the rotating body 11 to move in the direction of touching the bottom. After the rotating body 11 contacts the pressing block 10, the rotating body 11 can transmit the positive pressure to the pressing block 10. When the combined force of the positive pressure and gravity is greater than the supporting force provided by the flange 9, the pressing block 10 moves in the direction of touching the bottom. Since the lower connecting piece is made of elastic material, the pressing block 10 can force the lower connecting piece to expand outward, increase the circumferential pressure with the wall of the blast hole 15, and complete the locking.

[0053] When the lower pressure cylinder 6 is locked, the torque of axial rotation is transmitted through the torsion bar 1, and the torsional effect is transmitted to the rotating body 11, forcing the rotating body 11 to rotate around the axis. At the same time, the torsional moment is converted into a radial feed force of the locking pin 13, forcing the locking pin 13 to be pushed into the wall of the blast hole 15, completing the secondary locking and sealing operation of the blast hole 15.

[0054] Example 2

[0055] like Fig. 9 As shown, the difference between this embodiment and embodiment 1 is only that: the difference between this embodiment and embodiment 1 is only that: the Tesla structure in this embodiment adopts a left-right symmetrical layout structure.

[0056] The above are only embodiments of the present invention, and the common knowledge such as the known specific structures and / or characteristics in the scheme are not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A blasthole sealing device, characterized in that: include: A torsion bar (1), wherein a one-way flow structure is provided inside the torsion bar (1), and the one-way flow structure can allow a detonating wire to pass through; A lower pressing cylinder (6), wherein the lower pressing cylinder (6) is provided with a first wire hole for the torsion bar (1) to pass through; A rotating body (11), the rotating body (11) is threadedly connected to the torsion bar (1), the rotating body (11) is located in the lower pressure cylinder (6), and a second wire hole for the detonating wire to pass through is opened on the rotating body (11); A locking structure, wherein the locking structure is used to tightly lock the pressing cylinder (6).

2. A blasthole sealing device according to claim 1, characterized in that: The torsion bar (1) is composed of two semi-cylinders (2), the upper and lower ends of the two semi-cylinders (2) are integrally formed with connecting columns, the two connecting columns located on the same side are commonly provided with external threads, the two connecting columns located on the upper side are commonly threadedly connected with a cap (4), and the cap (4) is provided with a third wire hole for the detonating wire to pass through.

3. A blasthole sealing device according to claim 2, characterized in that: The one-way flow structure is a Tesla valve structure (5), and the Tesla valve structure (5) is opened on opposite sides of the two semi-cylinders (2).

4. A blasthole sealing device according to claim 2, characterized in that: Any one of the semi-cylinders (2) is provided with no less than three non-collinear limiting rods (3), and the other semi-cylinder (2) is provided with limiting holes that match the corresponding limiting rods (3).

5. A blasthole sealing device according to any one of claims 1 to 4, characterized in that: The locking structure comprises: A plurality of locking notches (12), wherein the plurality of locking notches (12) are circumferentially distributed on the side wall of the lower pressure cylinder (6), and all the locking notches (12) are arranged in a staggered manner in height; A plurality of locking pins (13), wherein the plurality of locking pins (13) are slidably connected in corresponding locking notches (12), and each of the locking pins (13) is located on a motion track of the rotating body (11); A rotary propulsion structure (14) is arranged at the bottom of the rotating body (11), and the rotary propulsion mechanism can push the locking pin (13) out of the lower pressure cylinder (6) and insert it into the inner wall of the blast hole (15).

6. A blasthole sealing device according to claim 5, characterized in that: The lower pressure cylinder (6) is composed of an upper connecting member (7) and a lower connecting member (8), wherein the upper connecting member (7) is threadedly connected to the lower connecting member (8), the lower connecting member (8) is made of elastic material, and a plurality of openings are provided on the lower connecting member (8). A plurality of flanges (9) located between adjacent openings are symmetrically provided on the lower inner wall of the lower pressure cylinder (6), and a lower pressure block (10) is provided on the flange (9). The lower pressure block (10) is slidably connected in the lower pressure cylinder (6), and the lower pressure block (10) is located on the motion trajectory of the rotating propulsion structure (14).

7. A blasthole sealing device according to claims 1-6, characterized in that: The rotating body (11) is composed of a first rotating block (16) and a second rotating block (17). The side walls of the first rotating block (16) and the second rotating block (17) are both provided with a push surface (18) for pushing the locking pin (13) to move. The push surfaces (18) on the first rotating block (16) and the second rotating block (17) are not collinear. The first rotating block (16) and the second rotating block (17) are distributed up and down. The first rotating block (16) is provided with a threaded hole threadedly connected to the torsion bar (1). The second wire hole is provided at the center of the second rotating block (17).

8. A blasthole sealing device according to claim 7, characterized in that: The sealing method of the sealing device is as follows: The sealing device is placed in the blast hole (15). When the sealing device touches the bottom, the axial positive pressure is transmitted through the torsion bar (1). The torsion bar (1) drives the rotating body (11) to move in the direction of touching the bottom. After the rotating body (11) contacts the downward pressing block (10), the rotating body (11) can transmit the positive pressure to the downward pressing block (10). When the combined force of the positive pressure and gravity is greater than the supporting force provided by the flange (9), the downward pressing block (10) moves in the direction of touching the bottom, forcing the lower connecting piece (8) to expand outward, thereby increasing the circumferential pressure on the wall of the blast hole (15) and completing the locking. When the lower pressure cylinder (6) is locked, the torque rotating around the axial direction is transmitted through the torsion bar (1), and the twisting action is transmitted to the rotating body (11), forcing the rotating body (11) to rotate around the axis. At the same time, the twisting moment is converted into a radial feed force of the locking pin (13), forcing the locking pin (13) to be pushed into the wall of the blast hole (15), completing the secondary locking and sealing operation of the blast hole (15).

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