Coal mine deep hole blasting internal expansion hole sealing device

Abstract

The utility model discloses a coal mine deep hole blasting internal expansion hole sealing device which comprises a hole sealing disc, a center cylinder is installed at the center of the hole sealing disc in an axial moving mode, an inner supporting piece sliding in the radial direction of the hole sealing disc is arranged at the position, located on the periphery of the center cylinder, of the bottom of the hole sealing disc, and an anchor rod is obliquely arranged on the inner supporting piece in a sliding mode. A first extrusion part matched with one side of the inner supporting piece and a second extrusion part matched with one end of the anchor rod are arranged on the outer side barrel wall of the center barrel, and a hole sealing column is installed in the center barrel in a threaded fit mode. The hole sealing device can tightly and effectively plug the hole opening of the deep hole, can be stably fixed, and is prevented from being separated from the hole opening.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of deep hole blasting hole sealing, and relates to a coal mine deep hole blasting internal expansion hole sealing device. BACKGROUND

[0002] Deep hole blasting is one of the commonly used blasting mining methods in open coal mines, and deep hole blasting needs to drill deep holes with a depth greater than 5m on rock strata, and explosives are filled into the deep holes for detonation. In order to improve the blasting quality and efficiency, and to avoid the splashing of the broken stones in the deep holes during the blasting process, the hole opening of the deep hole needs to be plugged to avoid the early leakage of the high-pressure gas generated by the blasting, and to avoid the broken stones flying out of the hole opening to cause safety hazards. In the prior art, yellow mud or a simple structure hole sealing cover is usually used to plug the hole opening of the deep hole. Although the yellow mud plugging has low cost, it is complicated to operate, has low plugging efficiency, and the effect of the yellow mud plugging is poor. The hole opening is plugged by the hole sealing cover, which is more convenient, but the hole sealing cover often loosens under the impact of the high-pressure gas in the deep hole, and even flies out of the hole opening, which reduces the blasting quality and even affects the construction safety in serious cases.

[0003] Therefore, in view of the above-mentioned deficiencies in the existing deep hole blasting hole sealing process, the utility model discloses a coal mine deep hole blasting internal expansion hole sealing device. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a coal mine deep hole blasting internal expansion hole sealing device, which can tightly and effectively plug the hole opening of the deep hole, and can stably fix the hole sealing device itself to avoid the hole sealing device from being pulled out of the hole opening.

[0005] The utility model realizes the following technical scheme:

[0006] A coal mine deep hole blasting internal expansion hole sealing device, comprising a hole sealing disc, a center cylinder is axially movably installed at the center of the hole sealing disc, an inner support is slidably arranged around the center cylinder at the bottom of the hole sealing disc along the radial direction of the hole sealing disc, and an anchor rod is obliquely slidably arranged on the inner support; a first extrusion part matched with one side of the inner support and a second extrusion part matched with one end of the anchor rod are arranged on the outer cylinder wall of the center cylinder, and a hole sealing column is threadedly and fixedly installed in the center cylinder.

[0007] A sealing disc is installed at the borehole opening. A central cylinder is then installed downwards at the center of the sealing disc. As the central cylinder moves downwards, the first extrusion section presses against the inner support member, causing it to move towards and tightly contact the borehole wall. Simultaneously, as the central cylinder moves downwards, the second extrusion section presses against one end of the anchor rod, causing it to move towards the borehole wall in an inclined direction until it is inserted into the borehole wall. The extrusion section and the anchor rod together internally expand and fix the sealing disc. A sealing post is then screwed into the internal threads of the central cylinder. The depth to which the sealing post is inserted into the deep hole is adjusted by changing the number of screw turns, thus controlling the final explosive sealing depth.

[0008] To better realize this utility model, the first extrusion part further includes a first extrusion cone sleeve and a first pressure wedge. The first extrusion cone sleeve is sleeved on the outside of the central cylinder. A radial groove is provided at the bottom of the sealing plate. The top of the first pressure wedge is slidably connected to the radial groove. The side of the first pressure wedge away from the central cylinder is connected to the inner support. The side of the first pressure wedge close to the central cylinder is provided with a pressure surface that mates with the outer cone surface of the first extrusion cone sleeve.

[0009] To better realize this utility model, the second extrusion part further includes a second extrusion cone sleeve, a second pressure wedge, and a guide sleeve. The second extrusion cone sleeve is sleeved on the outside of the central cylinder below the first extrusion cone sleeve. An inclined guide sleeve is provided on the inner support member, and an anchor rod is slidably provided inside the guide sleeve. The side of the second pressure wedge away from the central cylinder is connected to one end of the anchor rod, and the side of the second pressure wedge close to the central cylinder is provided with a pressure surface that mates with the outer cone surface of the second extrusion cone sleeve.

[0010] To better realize this utility model, a return spring is further provided between the anchor rod and the guide sleeve.

[0011] To better realize this utility model, the outer side of the sealing column is provided with external threads, the inner wall of the central cylinder is provided with internal threads, and the bottom end of the sealing column is provided with a flow divider cone.

[0012] To better realize this utility model, the top of the sealing column is provided with a force-applying plate, and a force-applying handle is provided on one side of the top of the force-applying plate.

[0013] To better realize this utility model, a scale is further provided on the top of the sealing plate on one side of the top of the sealing column.

[0014] To better realize this utility model, a central threaded hole is provided at the center of the sealing disc, and the outer wall of the central cylinder is threadedly connected to the central threaded hole.

[0015] To better realize this utility model, the inner support member is further provided as an arc-shaped plate, and anti-slip teeth are provided on the side of the arc-shaped plate near the wall of the deep hole.

[0016] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0017] (1) This utility model installs a central cylinder downward at the center of the sealing plate, and the inner support is squeezed towards the hole wall by the first extrusion part outside the central cylinder, so that the inner support is tightly fitted to the hole wall. At the same time, the anchor rod is squeezed towards the hole wall by the second extrusion part outside the central cylinder, so that the anchor rod is inserted into the hole wall. The cooperation between the inner support and the anchor rod can ensure that the sealing plate is firmly fixed at the hole opening, and prevent the sealing plate from falling out of the hole opening during the blasting process.

[0018] (2) This utility model installs a sealing column inside the central cylinder by threading it in. By rotating the sealing column, the depth of the sealing column inserted into the deep hole can be adjusted, thereby ensuring that the sealing column can be inserted into the deep hole at a suitable sealing depth, thus ensuring the sealing effect of the deep hole. Attached Figure Description

[0019] Figure 1 A cross-sectional schematic diagram of an internal expansion sealing device for deep-hole blasting in coal mines;

[0020] Figure 2 A partial enlarged view of the internal expansion sealing device for deep-hole blasting in coal mines;

[0021] Figure 3 A three-dimensional structural diagram of the internal expansion sealing device for deep-hole blasting in coal mines;

[0022] Figure 4 This is a schematic diagram of the structure of the first extrusion section and the second extrusion section;

[0023] Figure 5 This is a schematic diagram of the installation of the internal support components.

[0024] Wherein: 1-Sealing plate; 2-Central cylinder; 3-Inner support; 4-Anchor rod; 5-Sealing column; 6-Scale; 51-Diverter cone; 52-Force application plate; 100-First extrusion section; 200-Second extrusion section; 101-First extrusion cone sleeve; 102-First pressure wedge; 201-Second extrusion cone sleeve; 202-Second pressure wedge; 203-Guide sleeve; 204-Reset spring. Detailed Implementation

[0025] The following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise expressly indicated by the present invention, the singular form is intended to include the plural form as well. Furthermore, it should 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 ease of description, the words "up," "down," "left," and "right" appearing in this utility model only indicate that they are consistent with the up, down, left, and right directions of the accompanying drawings themselves, and do not limit the structure. They are merely for the purpose of facilitating the description of this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Terminology Explanation: The terms "installation," "connection," "linking," and "fixing" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction relationship between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0029] Example 1: This example describes a deep-hole blasting internal expansion sealing device for coal mines, such as... Figures 1-5 As shown, the device includes a sealing disc 1, a central cylinder 2 that is axially movable at the center of the sealing disc 1, an inner support member 3 that slides radially around the bottom of the sealing disc 1 around the central cylinder 2, and an anchor rod 4 that slides obliquely on the inner support member 3; a first extrusion part 100 that cooperates with one side of the inner support member 3 and a second extrusion part 200 that cooperates with one end of the anchor rod 4 are provided on the outer wall of the central cylinder 2; and a sealing column 5 is installed inside the central cylinder 2 with a threaded fit.

[0030] The specific sealing steps are as follows:

[0031] Step 1: Install the sealing plate 1 at the opening of the deep hole and press the sealing plate 1 firmly. Then, insert the center cylinder 2 downwards at the center of the sealing plate 1.

[0032] Step 2: Move the central cylinder 2 downwards so that the first extrusion part 100 on the outside of the central cylinder 2 extrudes the inner support 3 towards the direction close to the hole wall, so that the inner support 3 is in close contact with the hole wall; at the same time, the second extrusion part 200 on the outside of the central cylinder 2 tilts and extrudes the anchor rod 4 towards the direction close to the hole wall, so that the anchor rod 4 is inserted into the hole wall, and the sealing plate 1 is firmly fixed by the internal expansion of the anchor rod 4 and the inner support 3 under pressure.

[0033] Step 3: Lock the center cylinder 2, and then screw the sealing post 5 into the internal thread of the center cylinder 2. Adjust the depth of the sealing post 5 extending into the deep hole by controlling the number of screwing turns.

[0034] When the sealing device needs to be removed after blasting, first rotate the sealing column 5 in the reverse direction to disengage it from the inside of the central cylinder 2. Then move the central cylinder 2 upwards to disengage the first compression part 100 from the inner support member 3 and the second compression part 200 from the anchor rod 4. At this point, the inner support member 3 and the anchor rod 4 are no longer under pressure, the inner support member 3 is no longer tightly fitted to the borehole wall, and the anchor rod 4 is no longer under pressure. Then, lift the sealing plate 1 upwards to disassemble it.

[0035] Furthermore, the inner support 3 is an arc-shaped plate, and anti-slip teeth are provided on the side of the arc-shaped plate near the hole wall. When the arc-shaped plate contacts the hole wall, the anti-slip teeth can increase the friction, so that the sealing plate 1 can be firmly fixed at the hole opening during the blasting impact.

[0036] Example 2: An internal expansion sealing device for deep-hole blasting in coal mines, improved based on Example 1, such as... Figure 2 and Figure 4 As shown, the first extrusion section 100 includes a first extrusion cone sleeve 101 and a first pressure wedge 102. The first extrusion cone sleeve 101 is sleeved on the outside of the central cylinder 2. A radial groove is provided at the bottom of the sealing plate 1. The top of the first pressure wedge 102 is slidably connected to the radial groove. The side of the first pressure wedge 102 away from the central cylinder 2 is connected to the inner support member 3. The side of the first pressure wedge 102 near the central cylinder 2 is provided with a pressure surface that mates with the outer cone surface of the first extrusion cone sleeve 101.

[0037] When the central cylinder 2 moves downward, it causes the outer cone surface of the first extrusion cone sleeve 101 to press against the pressure surface of the first pressure wedge block 102. At this time, the first pressure wedge block 102 slides along the radial groove under pressure, which in turn causes the inner support 3 to slide towards the hole wall until one side of the inner support 3 is in close contact with the hole wall.

[0038] The other parts of this embodiment are the same as those in Embodiment 1, so they will not be described again.

[0039] Example 3: An internal expansion sealing device for deep-hole blasting in coal mines, improved based on Example 1 or 2, such as... Figure 2 and Figure 4 As shown, the second extrusion section 200 includes a second extrusion cone sleeve 201, a second pressure-bearing wedge 202, and a guide sleeve 203. The second extrusion cone sleeve 201 is sleeved on the outside of the central cylinder 2 at a position below the first extrusion cone sleeve 101. An inclined guide sleeve 203 is provided on the inner support member 3, and an anchor rod 4 is slidably provided inside the guide sleeve 203. The side of the second pressure-bearing wedge 202 away from the central cylinder 2 is connected to one end of the anchor rod 4, and the side of the second pressure-bearing wedge 202 close to the central cylinder 2 is provided with a pressure-bearing surface that mates with the outer cone surface of the second extrusion cone sleeve 201.

[0040] When the central cylinder 2 moves downward, it causes the outer cone surface of the second extrusion cone sleeve 201 to press against the pressure surface of the second pressure wedge block 202. At this time, the second pressure wedge block 202 causes the anchor rod 4 to slide along the inclined guide sleeve 203, so that one end of the anchor rod 4 is inserted into the hole wall.

[0041] Furthermore, a return spring 204 is provided between the anchor rod 4 and the guide sleeve 203. When the second pressure wedge 202 is pressed and drives the anchor rod 4 to move towards the hole wall, the return spring 204 is compressed. When the central cylinder 2 moves upward, the second pressure wedge 202 is no longer compressed by the outer conical surface of the second compression cone sleeve 201. At this time, the return spring 204 rebounds to drive the anchor rod 4 to move away from the hole wall, so that the anchor rod 4 can be dislodged from the hole wall, facilitating the disassembly of the sealing plate 1.

[0042] The other parts of this embodiment are the same as those in Embodiment 1 or 2, so they will not be described again.

[0043] Example 4: A deep-hole blasting internal expansion sealing device for coal mines, improved based on any one of Examples 1-3. The sealing column 5 has external threads on its outer surface, and the inner wall of the central cylinder 2 has internal threads. A flow-dividing cone 51 is provided at the bottom end of the sealing column 5. By rotating the sealing column 5, the depth to which the bottom end of the sealing column 5 extends into the deep hole can be adjusted, i.e., the sealing depth can be adjusted. Simultaneously, the flow-dividing cone 51, which is larger at the top and smaller at the bottom, is provided at the bottom end of the sealing column 5. During blasting, the flow-dividing cone 51 can disperse the blasting impact force, preventing the sealing column 5 from being subjected to excessive force and detaching.

[0044] Furthermore, such as Figure 1 As shown, a force-applying disc 52 is provided at the top of the sealing column 5, and a force-applying handle is provided on one side of the top of the force-applying disc 52. By holding the force-applying handle, the force-applying disc 52 can be easily rotated, thereby driving the sealing column 5 to rotate easily inside the central cylinder 2.

[0045] Furthermore, a scale 6 is provided on one side of the top of the sealing plate 1, which is located at the top of the sealing post 5. The depth data of the sealing post 5 being screwed into the deep hole can be easily read through the scale on the scale 6, so as to accurately control the depth of the sealing post 5 being inserted into the deep hole.

[0046] The other parts of this embodiment are the same as any one of embodiments 1-3, so they will not be described again.

[0047] Example 5: A deep-hole blasting internal expansion sealing device for coal mines, improved based on any one of Examples 1-4, wherein a central threaded hole is provided at the center of the sealing disc 1, and the outer wall of the central cylinder 2 is threadedly connected to the central threaded hole. By rotating the central cylinder 2, the central cylinder 2 can move axially relative to the sealing disc 1. At the same time, through the self-locking fit between the threads, the central cylinder 2 remains stable after being screwed into place and no longer moves axially relative to the sealing disc 1.

[0048] The other parts of this embodiment are the same as any one of embodiments 1-4, so they will not be described again.

[0049] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A deep-hole blasting internal expansion sealing device for coal mines, comprising a sealing disc (1), characterized in that, A central cylinder (2) is axially mounted at the center of the sealing disc (1). An inner support (3) that slides radially around the central cylinder (2) is provided at the bottom of the sealing disc (1). An anchor rod (4) is obliquely slidably mounted on the inner support (3). A first extrusion part (100) that cooperates with one side of the inner support (3) and a second extrusion part (200) that cooperates with one end of the anchor rod (4) are provided on the outer wall of the central cylinder (2). A sealing column (5) is installed inside the central cylinder (2) with a threaded fit.

2. The internal expansion sealing device for deep-hole blasting in coal mines according to claim 1, characterized in that, The first extrusion section (100) includes a first extrusion cone sleeve (101) and a first pressure wedge (102). The first extrusion cone sleeve (101) is sleeved on the outside of the central cylinder (2). A radial groove is provided at the bottom of the sealing plate (1). The top of the first pressure wedge (102) is slidably connected to the radial groove. The side of the first pressure wedge (102) away from the central cylinder (2) is connected to the inner support (3). The side of the first pressure wedge (102) close to the central cylinder (2) is provided with a pressure surface that mates with the outer cone surface of the first extrusion cone sleeve (101).

3. The internal expansion sealing device for deep-hole blasting in coal mines according to claim 2, characterized in that, The second extrusion section (200) includes a second extrusion cone sleeve (201), a second pressure wedge (202), and a guide sleeve (203). The second extrusion cone sleeve (201) is sleeved on the outside of the central cylinder (2) below the first extrusion cone sleeve (101). An inclined guide sleeve (203) is provided on the inner support member (3). An anchor rod (4) is slidably provided inside the guide sleeve (203). The side of the second pressure wedge (202) away from the central cylinder (2) is connected to one end of the anchor rod (4). The side of the second pressure wedge (202) close to the central cylinder (2) is provided with a pressure surface that cooperates with the outer cone surface of the second extrusion cone sleeve (201).

4. The internal expansion sealing device for deep-hole blasting in coal mines according to claim 3, characterized in that, A return spring (204) is provided between the anchor rod (4) and the guide sleeve (203).

5. A coal mine deep-hole blasting internal expansion sealing device according to any one of claims 1-4, characterized in that, The sealing column (5) has an external thread on its outer side, the central cylinder (2) has an internal thread on its inner wall, and the sealing column (5) has a flow divider cone (51) at its bottom end.

6. A deep-hole blasting internal expansion sealing device for coal mines according to claim 5, characterized in that, The top of the sealing column (5) is provided with a force-applying plate (52), and a force-applying handle is provided on one side of the top of the force-applying plate (52).

7. A deep-hole blasting internal expansion sealing device for coal mines according to claim 6, characterized in that, A scale (6) is provided on one side of the top of the sealing plate (1) located at the top of the sealing column (5).

8. A coal mine deep-hole blasting internal expansion sealing device according to any one of claims 1-4, characterized in that, The sealing disc (1) has a central threaded hole at its center, and the outer wall of the central cylinder (2) is threadedly connected to the central threaded hole.

9. A coal mine deep-hole blasting internal expansion sealing device according to any one of claims 1-4, characterized in that, The inner support member (3) is an arc-shaped plate, and anti-slip teeth are provided on the side of the arc-shaped plate near the wall of the deep hole.

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