Hole sealing equipment special for top-cutting presplitting blasting

Abstract

The utility model provides hole sealing equipment special for top-cutting presplitting blasting, and belongs to the technical field of coal mine presplitting blasting. The special hole sealing equipment for top-cutting presplitting blasting comprises an anti-impact head, an expandable column and a self-locking valve bank which are sequentially distributed from front to back, the anti-impact head and the self-locking valve bank are arranged at the front end and the rear end of the expandable column respectively, a cavity is formed in the expandable column, and fluid enters the cavity through the tail end of the expandable column after passing through the self-locking valve bank. The device has the advantages that the device can be recycled, the cost is reduced, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal mine pre-splitting blasting, in particular to a hole sealing equipment special for top cutting pre-splitting blasting. BACKGROUND

[0002] With the wide promotion and application of the technology of mining along goaf without coal pillar in coal production enterprises, especially the renewal iteration of digital electronic detonator, the hole sealing in the process of top cutting pressure releasing along goaf still uses artificial filling of stemming. During the implementation of the top cutting pressure releasing process, there are the following shortcomings: the stemming consumption is extremely large, the artificial stemming time of single hole is long and the efficiency is low, and the blasting line is easily damaged during the artificial stemming process.

[0003] The problems and shortcomings of the artificial stemming hole in the process of top cutting pressure releasing along goaf are as follows: 1, a large amount of stemming is consumed for the whole roadway; 2, the hole sealing time is long and the efficiency is low during the hole sealing process; 3, there is no standard for supervision and implementation, and the hole sealing is completely dependent on the experience of the operator for on-site implementation, and the hole sealing standard cannot be unified; 4, after the digital electronic detonator is used, the reliability of the blasting line is required to be high, and the process of tamping the stemming with the stemming ram during the artificial hole sealing is extremely easy to cause the line damage, which leads to the failure of detonation; 5, the stemming and debris on site have a great impact on the civilization and health of the roadway. CONTENT OF THE UTILITY MODEL

[0004] To solve the above technical problems, the utility model provides a hole sealing equipment special for top cutting pre-splitting blasting.

[0005] The technical scheme of the utility model is as follows:

[0006] A hole sealing equipment special for top cutting pre-splitting blasting, comprising an anti-impact head, an inflatable column and a self-locking valve group distributed in sequence from front to back, the anti-impact head and the self-locking valve group are respectively arranged at the front end and the rear end of the inflatable column, a cavity is arranged in the inflatable column, and fluid enters the cavity through the tail end of the inflatable column after passing through the self-locking valve group.

[0007] Further, the anti-impact head is a cylindrical metal structure.

[0008] Further, a metal plug is installed at the tail end of the inflatable column, and the self-locking valve group is installed on the metal plug.

[0009] Further, the inflatable column is a silk layer wound rubber hollow column structure.

[0010] Further, the anti-impact head comprises a first part and a second part distributed in front and back, the front end of the inflatable column is connected with the tail end of the second part, the first part is slidably installed on the second part in the front and back direction, the second part is provided with a retractable cutter head in the circumferential direction, and the cutter head is pushed out of the second part when the first part is displaced backward on the second part.

[0011] Further, the cutter head is circularly arranged and equidistantly arranged in the circumferential direction of the second part, the front end of the second part is provided with an axial sliding groove, and the tail end of the first part is slidingly installed in the axial sliding groove.

[0012] Further, the front end of the axial sliding groove is provided in a conical shape, the front end of the first part is provided in a cylindrical structure with an outer diameter matched with the second part, and the circumferential surface of the first part is provided with a conical surface matched with the front end of the axial sliding groove, and the front end of the inner side surface of the cutter head is supported by the conical surface.

[0013] Further, the outer surface of the cutter head is provided in an arc-shaped surface extending inwardly at the front end, and the rear end of the outer surface of the cutter head forms a cutting tip.

[0014] The utility model has the advantages of the following beneficial effects:

[0015] The utility model reduces the consumption of stemming during the implementation of the top cutting pre-cracking blasting process, can be recycled, saves material cost and labor cost, improves production efficiency, improves the safety of blasting, generates unified executable standards, is simple to operate and easy to implement, and reduces labor intensity. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the schematic view of the utility model embodiment 1;

[0017] Figure 2 is the schematic view of the utility model embodiment 2;

[0018] Figure 3 is the sectional view of the utility model Figure 2 .

[0019] Figure 4 is the schematic view of the cutter head of the utility model embodiment 2 when extending from the second part;

[0020] Figure 5 is the sectional view of the utility model Figure 4 . DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0022] As Figure 1As shown, the present embodiment 1 provides a hole sealing device special for top cutting pre-splitting blasting, which comprises an anti-impact head 1, an inflatable cylinder 2 and a self-locking valve group 3 arranged in sequence from front to back, the anti-impact head 1 and the self-locking valve group 3 are arranged at the front and rear ends of the inflatable cylinder 2 respectively, the inflatable cylinder 2 is provided with a cavity, and the fluid enters the cavity through the tail end of the inflatable cylinder 2 after passing through the self-locking valve group 3.

[0023] In use, the anti-impact head is inserted into the hole, the fluid enters the inside of the inflatable cylinder 2 through the self-locking valve group 3, so that the inflatable cylinder 2 expands, and the outer wall of the inflatable cylinder 2 fits the inner wall of the hole, thereby plugging the hole.

[0024] The anti-impact head 1 is a cylindrical metal structure, and the metal structure of the anti-impact head 1 can prevent the device from being damaged by the impact force of blasting.

[0025] The tail end of the inflatable cylinder 2 is provided with a metal plug 4, and the self-locking valve group 3 is installed on the metal plug 4, and the metal plug 4 can fix the self-locking valve group 3 on the inflatable cylinder 2.

[0026] The inflatable cylinder 2 is a hollow rubber cylinder structure with 22 wires and 4 layers of winding, and when water is injected, the inflatable cylinder 2 can deform, and the outer wall of the inflatable cylinder 2 fits the inner wall of the hole, thereby plugging the hole.

[0027] As shown in Figures 2 to 5 In embodiment 2, the anti-impact head 1 comprises a first part 11 and a second part 13 arranged in front and back, the front end of the inflatable cylinder 2 is connected with the tail end of the second part 13, the first part 11 is slidably installed on the second part 13 in the front and back direction, the second part 13 is provided with a retractable cutter head 14 in the circumferential direction, and the first part 11 is displaced backward on the second part 13 to eject the cutter head 14 out of the second part 13.

[0028] When the first part 11 slides towards the second part 13, the outer wall of the first part 11 can extend the cutter head 14 out of the inside of the second part 13.

[0029] The cutter head 14 is circularly arranged and equidistantly arranged in the circumferential direction of the second part 13, the front end of the second part 13 is provided with an axial sliding groove 15, the tail end of the first part 11 is slidably installed in the axial sliding groove 15, the front end of the axial sliding groove 15 is tapered, the front end of the first part 11 is a cylindrical structure with an outer diameter matched with the second part 13, and the circumferential surface of the first part 11 is provided with a tapered surface 12 matched with the front end of the axial sliding groove 15, and the front end of the inner side surface of the cutter head 14 is supported by the tapered surface 12.

[0030] When the blasting operation is performed, the impact force of the blasting hits the first part 11, so that the first part 11 slides towards the second part 13, and the conical surface slides towards the second part 13 when the first part 11 slides, the outer wall of the conical surface 12 is attached to the inner wall of the axial sliding groove 15, and the cutter head 14 is extruded out of the second part 13 and is stuck in the inner wall of the hole.

[0031] The outer surface of the cutter head 14 is provided as an arc surface extending inwardly at the front end, and the rear end of the outer surface of the cutter head 14 forms a cutting tip, and the arc surface of the cutter head 14 facilitates the cutter head 14 to retract into the second part 13 when the device is inserted into the inside of the hole, and the cutting tip part can be stuck in the inside of the hole when the first part 11 is extruded out of the second part 13 under the impact force of the blasting.

[0032] When the device is used, first, the anti-impact head 1 of the device is inserted into the inside of the hole, and the first part 11 slides towards the second part 13 due to the friction force of the inner wall of the hole, and the cutter head 14 is extruded out of the second part 13, and the circular arc surface of the cutter head 14 contacts the edge of the hole when the cutter head 14 is in the extruded state, and the circular arc surface of the cutter head 14 is extruded and retracted towards the second part 13 when the insertion is continued, so that the cutter head 14 can push the conical surface 12, the first part 11 slides away from the second part 13, the inner wall of the hole extrudes the cutter head 14 into the second part 13, and the remaining part of the device is conveniently inserted.

[0033] When the insertion is completed, the fluid is flowed into the inside of the inflatable cylinder 2 through the self-locking valve group 3, the inflatable cylinder 2 is deformed, the outer wall of the inflatable cylinder 2 is attached to the inner wall of the hole, and the hole is blocked.

[0034] When the blasting operation is performed, the impact force of the blasting hits the first part 11, so that the first part 11 slides towards the second part 13 due to the friction force of the attachment of the outer wall of the inflatable cylinder 2 to the inner wall of the hole, the conical surface slides towards the second part 13 when the first part 11 slides, the outer wall of the conical surface 12 is attached to the inner wall of the axial sliding groove 15, and the cutter head 14 is extruded out of the second part 13 and is stuck in the inner wall of the hole, which can prevent the device from being pushed out of the hole by the impact force, most of the impact force is left in the inner wall of the hole, the blasting effect is better, if the impact force is too large, the device is pushed to move in the inner wall of the hole, at this time, the cutter head 14 moves in the inner wall of the hole, and the hole can be cut, a cutting gap is left in the inner wall of the hole, and the blasting effect is better.

[0035] The above merely describes the preferred embodiments of the utility model and is not used to limit the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A sealing device specifically for pre-splitting blasting with top cutting, characterized in that, It includes an anti-impact head (1), an expandable column (2) and a self-locking valve group (3) arranged sequentially from front to back. The anti-impact head (1) and the self-locking valve group (3) are respectively arranged at the front and rear ends of the expandable column (2). The expandable column (2) has a cavity. After the fluid passes through the self-locking valve group (3), it enters the cavity through the tail end of the expandable column (2).

2. The sealing device for pre-splitting blasting with top cutting as described in claim 1, characterized in that, The impact-resistant head (1) is a cylindrical metal structure.

3. The sealing device for pre-splitting blasting with top cutting as described in claim 1, characterized in that, The expandable column (2) is fitted with a metal plug (4) at its tail end, and the self-locking valve assembly (3) is mounted on the metal plug (4).

4. The sealing device for pre-splitting blasting with top cutting as described in claim 1, characterized in that, The expandable column (2) is a hollow column structure made of 22 filaments wound in 4 layers of rubber.

5. A sealing device for pre-splitting blasting with top cutting as described in claim 2, characterized in that, The anti-impact head (1) includes a first part (11) and a second part (13) distributed in a front-to-back direction. The front end of the expandable column (2) is connected to the tail end of the second part (13). The first part (11) is slidably mounted on the second part (13) in the front-to-back direction. The second part (13) is provided with a telescopic cutter head (14) in the circumferential direction. When the first part (11) moves backward on the second part (13), it pushes the cutter head (14) out of the second part (13).

6. The sealing device for pre-splitting blasting with top cutting as described in claim 5, characterized in that, The cutter head (14) is arranged in a circular array and is provided at equal intervals in the circumferential direction of the second part (13). The front end of the second part (13) is provided with an axial groove (15), and the tail end of the first part (11) is slidably installed in the axial groove (15).

7. A sealing device for pre-splitting blasting with top cutting as described in claim 6, characterized in that, The front end of the axial groove (15) is set in a conical shape. The front end of the first part (11) is a cylindrical structure with an outer diameter that matches the second part (13). The circumferential surface of the first part (11) is provided with a conical surface (12) that matches the front end of the axial groove (15). The front end of the inner side of the cutter head (14) is supported by the conical surface (12).

8. A sealing device for pre-splitting blasting with top cutting as described in claim 5, characterized in that, The outer surface of the cutter head (14) is configured as an arc-shaped surface extending inward from the front end, and the rear end of the outer surface of the cutter head (14) forms a blade tip.

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