Blasting drilling subsection hole sealing device based on low-carbon mining

Abstract

The invention discloses a blasting drilling and segmented hole sealing device based on low-carbon mining, and relates to the technical field of blasting drilling and hole sealing. Comprising a grouting pipe, and positioning rods are symmetrically installed on the grouting pipe in a penetrating mode through elastic telescopic rods; the grouting device further comprises a center rod which is rotationally arranged in the grouting pipe, a push strip is fixed to the outer side of the center rod and abuts against the inner end of the positioning rod, the outer side of the grouting pipe is sleeved with a plurality of sets of sealing rings, each set of sealing rings comprises two sealing rings, and two sets of sealing plates are arranged in the sealing rings in a threaded sleeving mode through two sets of screws. The bevel gear roller is arranged in a middle cavity of the sealing ring, the grouting pipe is sleeved with the bevel gear ring in a limiting and sliding mode, and a driving mechanism is arranged between the sealing ring and the positioning rod. According to the blasting drilling segmented hole sealing device based on low-carbon mining, positioning pouring is carried out on the expanded holes, the hole sealing efficiency is improved, meanwhile, the segmented pouring pressure is adjusted according to the expanded holes with different depths, and the segmented hole sealing integrity is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of blasting borehole sealing, and particularly to a segmented borehole sealing device for blasting boreholes based on low-carbon mining. Background Technique

[0002] In the process of natural gas such as gas collection, in order to reduce the impact of mining activities on climate change and promote the transformation of energy production towards green, low-carbon, and sustainable directions, a new mining mode based on low-carbon mining has gradually been put into use. During low-carbon mining, in order to prevent rock bursts, blasting is carried out on the hard roof overlying the coal seam or rock stratum to cut off the stress transmission path above. This is a good technical measure. During roof cutting blasting, drilling operations are usually required. Further, in order to improve the blasting safety and stability in the borehole, segmented sealing is usually required for concentrated blasting while avoiding affecting external safety. However, the existing segmented sealing devices have the following problems when in use:

[0003] When performing borehole sealing, most of them carry out segmented reaming in the hole through a reaming mechanism, and then form by pouring slurry for multi-stage plugging. However, the existing segmented sealing devices are not convenient for stable pouring in the reamed area. In some non-vertical borehole areas, backflow is likely to occur, affecting the internal sealing formation. At the same time, for different blasting areas and intensities, the borehole and sealing specifications are also different. The existing segmented sealing devices are not convenient for adaptive adjustment according to the specifications, resulting in low practicability.

[0004] In view of the above problems, there is an urgent need for innovative design on the original basis. Summary of the Invention

[0005] The purpose of the present invention is to provide a segmented borehole sealing device for blasting boreholes based on low-carbon mining to solve the problems in the above background technique that the existing segmented sealing devices are not convenient for stable pouring in the reamed area and are not convenient for adaptive adjustment according to the specifications. The technical solution of the present invention provides a solution significantly different from the prior art for the technical problem that the prior art solution is too single.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A segmented borehole sealing device for blasting boreholes based on low-carbon mining, including a grouting pipe, and positioning rods are symmetrically and penetratingly installed on the grouting pipe through elastic telescopic rods;

[0007] It further includes a central rod which is rotatably arranged inside the grouting pipe. A pushing strip is fixed on the outer side of the central rod, and the pushing strip abuts against the inner end of the positioning rod. A plurality of groups of sealing rings are sleeved on the outer side of the grouting pipe, with two sealing rings in each group. Two sealing plates are threadedly sleeved inside the sealing ring through two screw rods. The inner end of the screw rod is connected with a bevel gear roller which is arranged in the middle cavity of the sealing ring. The inner sides of the two bevel gear rollers are engaged with a bevel gear ring which is limited and slidably sleeved on the grouting pipe. A driving mechanism is arranged between the sealing ring and the positioning rod. An outlet pipe communicating with the grouting pipe is arranged between the two sealing rings. A plugging ball is installed in the outlet pipe through a mounting table and a spring.

[0008] An adjusting assembly is arranged between the outlet pipe and the sealing ring and is used for adjusting the distance between the two sealing rings.

[0009] Preferably, the cross-section of the pushing strip is in an arc structure, and the thickness of the pushing strip gradually decreases. The pushing strip is used for abutting against the positioning rod to extend out.

[0010] Preferably, the sealing plate fits and slides in the outer cavity of the sealing ring through the screw rod. The sealing plate is in a fan-shaped structure and is equally angularly distributed in the sealing ring. The front and rear sealing plates are arranged in a misaligned and fitted manner.

[0011] Preferably, the driving mechanism includes a main gear roller which is limited and rotatably installed at the protruding position outside the grouting pipe. The main gear roller is engaged with the rack area of the positioning rod. The inner end of the main gear roller is embedded and limitedly slidably installed with a sub-gear roller, and the outer side of the sub-gear roller is engaged with a driving gear ring which is fixed on the outer side of the sealing ring.

[0012] Preferably, the side wall of the middle area inside the outlet pipe is designed as an inclined surface structure, and the inner inclined surface of the outlet pipe fits with the plugging ball. The elastic forces of the springs on the plugging balls in the plurality of outlet pipes increase in sequence.

[0013] Preferably, the adjusting assembly includes a tooth sleeve which is sleeved and installed on the outer side of the outlet pipe. Tooth rods are engaged on the front and rear sides of the tooth sleeve. The tooth rods are slidably arranged at the protruding position outside the grouting pipe. One end of the tooth rod is connected with the sealing ring. A pushing piece is fixed in the inner cavity of the tooth sleeve. A connecting rod is abutted and arranged below the pushing piece, and the connecting rod penetrates through the outlet pipe and is fixed to the mounting table.

[0014] Preferably, the rotation of the tooth sleeve is used to drive the front and rear tooth rods to move relatively. The end of the tooth rod is designed as a spherical structure and is limited and slidably arranged in the annular cavity outside the sealing ring.

[0015] Preferably, the bottom of the pushing piece is designed as an inclined structure, and the inclined surface at the bottom of the pushing piece is used for abutting against the connecting rod to move downward.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. In the present invention, after the grouting pipe is inserted into the hole, by rotating the central rod, the push bar pushes the positioning rod, so that the positioning rod extends out and contacts the inner wall of the hole, positioning the grouting pipe. At the same time, through the driving mechanism, the sealing ring is driven to rotate, and the conical gear roller and the conical gear ring drive the screw rod to rotate. The two screw rods drive their respective sealing plates to move outward, so that the sealing plates in the two sealing rings enter both sides of the reamed hole. The sealing plates that are attached to each other front and back and are misaligned can cooperate with the two sealing rings to seal the reamed hole, which is convenient for subsequent stable perfusion into this closed space through the discharge pipe. Further, according to the diameter of the hole, on the one hand, the position of the positioning rod can be adjusted, and on the other hand, the extension distance of the sealing plate can be adjusted by the extension distance of the positioning, which is applicable to the hole sealing operation of holes with different inner diameters;

[0018] 2. In the present invention, multiple groups of sealing rings are provided to cope with the perfusion and sealing operations of multiple reamed hole areas. The discharge pipe between each group of two sealing rings is used to cooperate with the internal perfusion of the grouting pipe to perform perfusion operations on the reamed hole areas. The spring in the discharge pipe and the plugging ball form a one-way structure. The elastic forces of the springs in multiple discharge pipes increase sequentially, which can change the perfusion pressure and facilitate automatic separate perfusion from the inside to the outside. For different strength blasting requirements, the sealing strength can be improved by deepening the reamed hole length. On this basis, the tooth sleeve can be rotated, and the position of the two sealing rings can be adjusted through the tooth rod to adapt to reamed holes of different lengths. At the same time, the rotation of the tooth sleeve can drive the connecting rod to move downward through the push piece to squeeze the spring, so as to increase the pressure of the spring. Furthermore, for longer reamed holes, it can be adapted by adjusting the pressure of the spring. This method is because more slurry is required in longer reamed holes, and the increase in slurry will increase the pressure on the plugging ball. If no adjustment is made, the reaction pressure will affect the subsequent spring and plugging ball, resulting in incomplete perfusion inside the front end. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic front sectional structure diagram of the present invention;

[0020] Figure 2 is of the present invention Figure 1 the enlarged structure diagram at A in;

[0021] Figure 3 is a schematic side structure diagram of the central rod of the present invention;

[0022] Figure 4 is a schematic side distribution structure diagram of the left sealing plate of the present invention;

[0023] Figure 5 is a schematic side distribution structure diagram of the right sealing plate of the present invention;

[0024] Figure 6 is of the present inventionFigure 1 Schematic diagram of the enlarged structure at position B in the [device];

[0025] Figure 7 This is for the present invention Figure 6 Schematic diagram of the enlarged structure at position C in the [device];

[0026] Figure 8 Schematic side view structure diagram of the pushing piece of the present invention.

[0027] In the figure: 1, grouting pipe; 2, positioning rod; 3, elastic telescopic rod; 4, pushing strip; 5, central rod; 6, sealing ring; 7, screw rod; 8, sealing plate; 9, conical tooth roller; 10, conical tooth ring; 111, main tooth roller; 112, auxiliary tooth roller; 113, driving tooth ring; 12, discharge pipe; 13, installation table; 14, spring; 15, plugging ball; 161, tooth sleeve; 162, tooth rod; 163, pushing piece; 164, connecting rod. Specific implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1-8 , the present invention provides a technical solution: a blasting hole sectional plugging device based on low-carbon mining, a positioning rod 2 is symmetrically and penetratively installed on the grouting pipe 1 through an elastic telescopic rod 3; a central rod 5 is rotatably arranged in the grouting pipe 1, a pushing strip 4 is fixed on the outer side of the central rod 5, the pushing strip 4 abuts against the inner end of the positioning rod 2, multiple groups of sealing rings 6 are sleeved on the outer side of the grouting pipe 1, each group of sealing rings 6 has two, two sealing plates 8 are threadedly sleeved in the sealing ring 6 through two screw rods 7, the inner end of the screw rod 7 is connected with a conical tooth roller 9, the conical tooth roller 9 is arranged in the middle cavity of the sealing ring 6, two inner sides of the conical tooth rollers 9 are meshed with a conical tooth ring 10, the conical tooth ring 10 is limited and slidably sleeved on the grouting pipe 1, and a driving mechanism is arranged between the sealing ring 6 and the positioning rod 2;

[0030] As an implementation manner of the present invention, the side cross-section of the pushing strip 4 is in an arc structure, the thickness of the pushing strip 4 gradually decreases, and the pushing strip 4 is used to abut against the positioning rod 2 to extend out;

[0031] Insert the grouting pipe 1 into the corresponding position of the hole, and rotate the central rod 5. The central rod 5 drives the pushing strip 4 to move. By the external contact between the pushing strip 4 and the positioning rod 2, the positioning rod 2 is pushed to move outward until the outer end of the positioning rod 2 abuts against the inner wall of the hole, and the grouting pipe 1 is positioned and installed.

[0032] As an embodiment of the present invention, the sealing plate 8 is fitted and slid in the outer cavity of the sealing ring 6 through the screw 7, and the sealing plates 8 are fan-shaped and distributed at equal angles in the sealing ring 6, and the front and rear sealing plates 8 are fitted and staggered; the driving mechanism includes a main toothed roller 111, which is limited and rotatably installed at a protruding position outside the grouting pipe 1, and the main toothed roller 111 is meshed with the rack area of the positioning rod 2, and the inner end of the main toothed roller 111 is embedded with a secondary toothed roller 112 for limited sliding installation, and the outer side of the secondary toothed roller 112 is meshed with a driving toothed ring 113, and the driving toothed ring 113 is fixed to the outer side of the sealing ring 6;

[0033] The movement of the positioning rod 2 drives the main gear roller 111 to rotate, and the main gear roller 111 drives the auxiliary gear roller 112 to rotate. The auxiliary gear roller 112 meshes with the driving gear ring 113, driving the sealing ring 6 to rotate outside the grouting pipe 1. At this time, the bevel gear ring 10 is restricted and will not rotate with it, so that the bevel gear roller 9 is forced to rotate and drives the screw 7 to rotate. The screw 7 drives the sealing plate 8 to move outward, so that the sealing plate 8 contacts the two sides of the expansion hole. A rubber pad is set at the outer end of the sealing plate 8 to improve the sealing effect. The front and rear two sets of staggered sealing plates 8 can effectively avoid leakage.

[0034] As an embodiment of the present invention, a discharge pipe 12 penetrating the grouting pipe 1 is provided between the two sealing rings 6, and a blocking ball 15 is installed in the discharge pipe 12 through a mounting platform 13 and a spring 14; the side wall of the middle area inside the discharge pipe 12 is designed as a slope structure, the slope inside the discharge pipe 12 fits the blocking ball 15, and the elastic force of the spring 14 on the blocking ball 15 in the multiple discharge pipes 12 increases in sequence;

[0035] The grouting pipe 1 is poured with slurry, and the sealing ball 15 in the innermost discharge pipe 12 is lifted up by pressure, so that the slurry enters the expanded hole to harden and seal. After the filling inside the front expanded hole is completed, the subsequent sealing balls 15 are opened in sequence under pressure to carry out the filling and sealing operations of multiple-stage expanded holes in sequence.

[0036] As an embodiment of the present invention, an adjusting component is arranged between the discharge pipe 12 and the sealing ring 6, and the adjusting component is used to adjust the distance between the two sealing rings 6; the adjusting component includes a gear sleeve 161, and the gear sleeve 161 is sleeved and installed on the outside of the discharge pipe 12, and the front and rear sides of the gear sleeve 161 are meshed with gear rods 162, and the gear rod 162 is slidably arranged at the protruding position outside the grouting pipe 1, and one end of the gear rod 162 is connected to the sealing ring 6, and a push piece 163 is fixed in the internal cavity of the gear sleeve 161, and a connecting rod 164 is arranged below the push piece 163, and the connecting rod 164 passes through the discharge pipe 12 and is fixed to the mounting platform 13; the rotation of the gear sleeve 161 is used to drive the front and rear gear rods 162 to move relative to each other, and the end of the gear rod 162 is designed as a spherical structure to slide within the annular cavity outside the sealing ring 6; the bottom of the push piece 163 is designed as an inclined structure, and the inclined surface at the bottom of the push piece 163 is used to resist the connecting rod 164 to move downward;

[0037] Adjust the device in advance according to the reaming length. Rotate the gear sleeve 161. The gear sleeve 161 and the front and rear two rack bars 162 drive the sealing rings 6 on both sides to move towards each other. The sealing ring 6 drives the bevel gear ring 10 to move through the bevel gear roller 9. The protrusion at the bottom of the bevel gear ring 10 moves in the outer cavity of the grouting pipe 1 for limiting. At the same time, the gear sleeve 161 drives the push plate 163 to rotate. The inclined surface at the bottom of the push plate 163 contacts the connecting rod 164, and drives the mounting table 13 to move downward through the connecting rod 164, squeezing the spring 14 and adjusting the pressure of the spring 14.

[0038] Working principle: First, adjust the device in advance according to the reaming length. Rotate the gear sleeve 161. The gear sleeve 161 and the front and rear two rack bars 162 drive the sealing rings 6 on both sides to move towards each other. The sealing ring 6 drives the bevel gear ring 10 to move through the bevel gear roller 9. The protrusion at the bottom of the bevel gear ring 10 moves in the outer cavity of the grouting pipe 1 for limiting. At the same time, the gear sleeve 161 drives the push plate 163 to rotate. The inclined surface at the bottom of the push plate 163 contacts the connecting rod 164, and drives the mounting table 13 to move downward through the connecting rod 164, squeezing the spring 14 and adjusting the pressure of the spring 14. At the same time, the movement of the sealing ring 6 pushes the auxiliary gear roller 112 to move inside the main gear roller 111 to ensure its connection and transmission.

[0039] Then insert the grouting pipe 1 into the corresponding position of the hole, and rotate the central rod 5. The central rod 5 drives the push bar 4 to move. By the outer part of the push bar 4 contacting the positioning rod 2, the positioning rod 2 is pushed to move outward until the outer end of the positioning rod 2 contacts the inner wall of the hole to position and install the grouting pipe 1. The movement of the positioning rod 2 drives the main gear roller 111 to rotate. The main gear roller 111 drives the auxiliary gear roller 112 to rotate. The auxiliary gear roller 112 meshes with the driving gear ring 113 to drive the sealing ring 6 to rotate outside the grouting pipe 1. At this time, the bevel gear ring 10 is restricted and will not rotate accordingly, causing the bevel gear roller 9 to rotate under force and drive the screw rod 7 to rotate. The screw rod 7 drives the sealing plate 8 to move outward, so that the sealing plate 8 contacts both sides of the reamed hole. A rubber pad is arranged at the outer end of the sealing plate 8 to improve the sealing effect. The front and rear two groups of sealing plates 8 are distributed in a staggered manner, effectively avoiding leakage. Then pour the slurry into the grouting pipe 1. The plugging ball 15 in the innermost discharge pipe 12 is pushed up under pressure, so that the slurry enters the reamed hole for hardening and plugging. After the pouring in the innermost part of the front-end reamed hole is completed, the subsequent plugging balls 15 are opened in sequence under pressure for the sequential pouring and plugging operations of multiple sections of reamed holes.

[0040] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A blasting hole segmental plugging device based on low-carbon mining, comprising a grouting pipe (1), and positioning rods (2) are symmetrically and penetratively installed on the grouting pipe (1) through elastic telescopic rods (3); It is characterized in that: It further includes a central rod (5), the central rod (5) is rotatably arranged in the grouting pipe (1), a push strip (4) is fixed on the outer side of the central rod (5), the push strip (4) abuts against the inner end of the positioning rod (2), multiple groups of sealing rings (6) are sleeved on the outer side of the grouting pipe (1), each group of sealing rings (6) has two, two sealing plates (8) are threadedly sleeved in the sealing ring (6) through two groups of screw rods (7), the inner end of the screw rod (7) is connected with a bevel gear roller (9), the bevel gear roller (9) is arranged in the middle cavity of the sealing ring (6), two bevel gear rings (10) are meshed on the inner sides of the two bevel gear rollers (9), the bevel gear ring (10) is limited and slidably sleeved on the grouting pipe (1), a driving mechanism is arranged between the sealing ring (6) and the positioning rod (2), and a discharge pipe (12) communicating with the grouting pipe (1) is arranged between the two sealing rings (6), and a plugging ball (15) is installed in the discharge pipe (12) through a mounting table (13) and a spring (14); An adjusting assembly, the adjusting assembly is arranged between the discharge pipe (12) and the sealing ring (6), and the adjusting assembly is used to adjust the distance between the two sealing rings (6).

2. The blast hole sectional plugging device based on low-carbon mining according to claim 1, characterized in that: The side cross-section of the push strip (4) is in an arc structure, the thickness of the push strip (4) gradually decreases, and the push strip (4) is used to abut against the positioning rod (2) to extend out.

3. The blasting hole sectional plugging device based on low-carbon mining according to claim 2, wherein: The sealing plate (8) fits and slides in the outer cavity of the sealing ring (6) through the screw rod (7), the sealing plate (8) is in a fan-shaped structure and is equally angularly distributed in the sealing ring (6), and the front and rear sealing plates (8) are arranged in a staggered fit.

4. A blasting borehole sectional plugging device based on low-carbon mining according to claim 3, characterized in that: The driving mechanism includes a main gear roller (111), the main gear roller (111) is limited and rotatably installed at the protruding position outside the grouting pipe (1), the main gear roller (111) is meshed with the rack area of the positioning rod (2), a secondary gear roller (112) is embedded and limited and slidably installed at the inner end of the main gear roller (111), and a driving gear ring (113) is meshed on the outer side of the secondary gear roller (112), and the driving gear ring (113) is fixed on the outer side of the sealing ring (6).

5. A blasting borehole sectional plugging device based on low-carbon mining according to claim 4, characterized in that: The side wall of the middle area inside the discharge pipe (12) is designed as an inclined surface structure, the inner inclined surface of the discharge pipe (12) fits with the plugging ball (15), and the elastic forces of the springs (14) on the plugging balls (15) in the multiple discharge pipes (12) increase in sequence.

6. The blasting borehole sectional plugging device based on low-carbon mining according to claim 5, characterized in that: The adjusting assembly includes a tooth sleeve (161), the tooth sleeve (161) is sleeved on the outer side of the discharge pipe (12), tooth rods (162) are meshed on the front and rear sides of the tooth sleeve (161), the tooth rods (162) are slidably arranged at the protruding position outside the grouting pipe (1), one end of the tooth rod (162) is connected with the sealing ring (6), a push piece (163) is fixed in the inner cavity of the tooth sleeve (161), a connecting rod (164) is abutted below the push piece (163), and the connecting rod (164) penetrates through the discharge pipe (12) and is fixed with the mounting table (13).

7. A sectional hole sealing device for blasting drilling based on low-carbon mining according to claim 6, characterized in that: The rotation of the gear sleeve (161) is used to drive the front and rear gear rods (162) to move relative to each other. The end of the gear rod (162) is designed as a spherical structure and slides within the annular cavity outside the sealing ring (6).

8. A sectional hole sealing device for blasting drilling based on low-carbon mining according to claim 7, characterized in that: The bottom of the push piece (163) is designed as an inclined structure, and the inclined surface at the bottom of the push piece (163) is used to resist the downward movement of the connecting rod (164).

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