阅读说明：本技术 一种分节螺旋橡胶囊封孔装置 (Segmented spiral rubber bag hole sealing device ) 是由 李振峰 李文彩 于 2019-11-06 设计创作，主要内容包括：本发明涉及一种分节螺旋橡胶囊封孔装置,该封孔装置包括扩孔钻头及由结构相同的内部中空且带有螺旋橡胶囊的注水前端管、注水加接管、注水终端管相连接组成的注水管。注水管的各节连接完成后,内部相通,且通过注水管外壁的通水孔和螺旋橡胶囊底部的过水孔与螺旋橡胶囊相通,注水前端管的前部安装有背压单向阀,注水终端管的后部安装有止回单向阀。当注进高压水时,各节注水管的螺旋橡胶囊膨胀,起到密封钻孔周边及同时向深部煤层注水的效果；当回收装置时,释放注水管内的压力,各节注水管靠钻机动力旋转及外拔,可方便地将整个装置回收,能够实现在松软煤层条件下煤层深孔注水时封孔装置的顺利回收。(The invention relates to a hole sealing device for a segmented spiral rubber bag, which comprises a hole expanding drill bit and a water injection pipe which is formed by connecting a water injection front end pipe, a water injection adding pipe and a water injection terminal pipe which are of the same structure, hollow inside and provided with the spiral rubber bag. After each section of water injection pipe is connected and is accomplished, inside communicates with each other, and the limbers through the water injection pipe outer wall and the water hole of crossing of spiral rubber bag bottom communicate with each other with spiral rubber bag, and the forward-mounted of water injection front end pipe has the backpressure check valve, and the back portion of water injection terminal pipe installs the check valve. When high-pressure water is injected, the spiral rubber bags of the water injection pipes expand to seal the periphery of the drilled hole and simultaneously inject water into the deep coal seam; when the device is recovered, the pressure in the water injection pipe is released, and each water injection pipe rotates and is pulled out by the power of the drilling machine, so that the whole device can be conveniently recovered, and the smooth recovery of the hole sealing device can be realized during the deep hole water injection of the coal seam under the condition of a soft coal seam.)

1. The utility model provides a merogenesis spiral rubber bag hole sealing device which characterized in that: including water injection pipe, spiral rubber bag, pipe end jointing device, reamer bit, check valve and sealing device, wherein:

the water injection pipe comprises a water injection front end pipe, a plurality of water injection filling pipes and a water injection terminal pipe which are connected with each other in sequence from front to back, the water injection front end pipe, the water injection filling pipes and the water injection terminal pipe are of the same structure and are all of an internal hollow structure, helical blades are arranged on the outer wall of each water injection front end pipe, and more than 2 water through holes are formed in the outer wall of each water injection front end pipe;

the spiral rubber bag is in a strip shape with a hollow inner part, two ends of the spiral rubber bag are sealed, the spiral rubber bag is wound on the outer wall of the water injection pipe between the spiral blades, and water passing holes which are in one-to-one correspondence with the water passing holes are formed in the bottom of the spiral rubber bag;

the pipe end jointing devices are respectively positioned at two end parts of the water injection front end pipe, two end parts of the water injection adding pipe and two end parts of the water injection terminal pipe and are used for realizing the connection between two adjacent water injection pipes;

the hole expanding drill bit is arranged at the front end part of the water injection front end pipe;

the check valve comprises a back pressure check valve arranged in an inner cavity at the front part of the water injection front end pipe and a check valve arranged in an inner cavity at the rear part of the water injection rear end pipe;

the sealing devices are respectively arranged at the front end part of the water injection front end pipe, the front end part of the water injection filling pipe and the front end part of the water injection terminal pipe.

2. The device for sealing the segmented spiral rubber capsules as claimed in claim 1, wherein: the bottom of the spiral rubber bag is fixedly connected with the outer wall of the water injection pipe in an adhesion or vulcanization mode.

3. The device for sealing the segmented spiral rubber capsules as claimed in claim 1, wherein the lengths of the water injection front end pipe, the water injection filling pipe and the water injection terminal pipe are all 1 ~ 3m, the outer diameters of the water injection front end pipe, the water injection filling pipe and the water injection terminal pipe are all 50 ~ 200mm, and the materials are all metal or plastic materials.

4. The device for sealing the segmented spiral rubber capsules as claimed in claim 1, wherein the lift angle α of the spiral blade is 20 ° ~ 30 °.

5. The device for sealing the segmented spiral rubber capsules as claimed in claim 1, wherein: the pipe end connecting device is an internal thread sleeve and an external thread sleeve head which are mutually matched for use or a bayonet pin and a clamping sleeve which are mutually matched for use.

6. The device for sealing the segmented spiral rubber capsules as claimed in claim 5, wherein: the water injection front end pipe is provided with an external thread sleeve head, the water injection filling pipe is provided with an internal thread sleeve head, the external thread sleeve head is respectively arranged at the front part of the water injection front end pipe, the front part of the water injection filling pipe and the front part of the water injection terminal pipe, and the internal thread sleeve head is respectively arranged at the rear part of the water injection front end pipe, the rear part of the water injection filling pipe and the rear part of.

7. The device for sealing the segmented spiral rubber capsules as claimed in claim 5 or 6, wherein: the reaming bit is of a conical semi-hollow structure, a guide screw is processed on the outer wall of the reaming bit, an internal thread sleeve matched with an external thread sleeve head at the front part of the water injection front end pipe is also processed at the rear part of the reaming bit, more than 2 water outlet inclined holes are formed in the pipe wall of the reaming bit, and the water outlet direction of each water outlet inclined hole is opposite to the rotating direction of the reaming bit.

8. The device for sealing the segmented spiral rubber capsules as claimed in claim 7, wherein: the spiral direction of the guide spiral is consistent with that of the spiral blade, and the lead angle beta of the guide spiral is the same as the lead angle alpha of the spiral blade.

9. The device for sealing the segmented spiral rubber capsules as claimed in claim 1 ~ 8, wherein the number of the water injection connecting pipes is in direct proportion to the depth of the water injection drill hole.

10. The device for sealing the hole of the segmented spiral rubber bag as claimed in claim 5 ~ 7, wherein the sealing device is an O-ring seal sleeved on the thread shoulder of the front external thread sleeve head of the water injection front end pipe, the water injection filling pipe and the water injection terminal pipe respectively.

Technical Field

The invention belongs to the technical field of coal mine underground mining, and particularly relates to a segmented spiral rubber bag hole sealing device.

Background

In underground coal mine mining, advanced water injection of a coal seam is a common technical process, injected high-pressure water penetrates into a coal body, the balance of an original coal-gas two-phase system in the coal body is destroyed, a coal-gas-water three-phase system is formed, and all media in the system interact with each other to change the physicochemical property, the mechanical property and the thermodynamic property of the coal. The coal seam water injection has two important aspects in mine production, and firstly, the comprehensive dust prevention has a positive effect on the prevention of occupational diseases; and secondly, rock burst and coal and gas outburst are prevented, and mine safe production is promoted. The coal seam water injection operation comprises the specific steps of drilling a plurality of drill holes in the coal seam in advance before stoping, flushing coal dust in the holes with clean water after drilling the drill holes, sealing the holes and injecting pressure water through the drill holes, wherein the sealing of the holes is a key link of coal seam water injection and directly influences the final effect of the coal seam water injection. In the prior art, most of hole sealing methods adopt rubber bag hole sealing, cement mortar hole sealing, mechanical hole sealing and the like.

The current common water injection drilling rubber bag hole packer is a KJ series hydraulic pressure capsule hole packer, and the specific operation steps are as follows: firstly, drilling a hole on a coal wall, then completely inserting a hole packer into the drilled hole, and expanding a rubber pipe of the hole packer under certain water pressure to realize hole sealing. The hole sealing device adopts a hydraulic expansion mode, a hole sealing section is a rubber bag with one end provided with a hydraulic one-way valve, when high-pressure water is injected, the water pressure in the rubber bag reaches a certain pressure due to the back pressure effect of the one-way valve, and the rubber bag expands to play a hole sealing effect; when the water pressure exceeds the back pressure of the one-way valve, the one-way valve is partially opened, and high-pressure water flows into the deep part of the drill hole through the one-way valve to carry out coal seam water injection work. The hole sealing device has the advantages of simple structure and folding during transportation, and the length of a single hole sealing device can reach about 6m, so that the hole sealing device is suitable for being used in a small-section roadway.

Another commonly used hole sealing device for water injection drill holes is an air bag separation structure, a main pipe is a steel pipe or a hard rubber pipe, a section of sealed rubber air bag is sleeved outside the main pipe, the air bag is communicated with an inflation branch pipe outwards, when the hole sealing device is used, the hole sealing device is placed in a drill hole, high-pressure gas is filled into the rubber air bag through the inflation branch pipe, and the periphery of the drill hole is tightly sealed by the expansion of the air bag. The device has the advantages that the hole sealing effect is better than that of the first hole sealing device, and the device has the defects that the device cannot be folded and lengthened, and the length is generally about 2 m.

The two common rubber bag hole sealing devices are generally used in coal seams with medium hardness or above, but have poor effect when used in soft coal seams. The reason is that the penetration radius of water in the soft coal seam is large, about 5m, and the depth of the hole sealing is required to be larger than the penetration radius, so that the water cannot seep out of the coal wall in the water injection process. Due to the soft characteristic of the coal seam, when the hole sealing length is short, the hole sealing effect is difficult to achieve, and the hole sealing length is required to be more than 5 m. This makes the above-mentioned second balloon-separation type hole packer of about 2m length difficult to use in the field. When the depth of the drilled hole reaches more than 6m, the device can be forcibly used, but the recovery is relatively difficult, because the water in the soft coal seam expands after being wetted, the coal body around the drilled hole tightly presses the water injection pipe and the rubber bag, and the recovered rubber bag is damaged even if the device is forcibly pulled out of the drilled hole. The first KJ series hydraulic capsule type hole packer is basically disposable and cannot be recycled due to the special reason of the soft coal bed; in addition, as the soft coal seam near the coal wall orifice of the water injection drill hole is influenced by the roadside support pressure, local hole collapse occurs after the drilling drill rod is drawn out, so that the hydraulic capsule type hole packer is very difficult to place in the drill hole and the construction speed is slow. And the hole sealing device with the length of about 6m on the market is high in price at present, and the water injection cost of the soft coal seam is high due to the disposable use.

Therefore, the hole sealing device for the soft coal seam water injection drilling still has two technical problems to be solved: firstly, can't satisfy the requirement of longer hole sealing length in the soft coal seam, secondly the hole sealing device can not reuse.

Disclosure of Invention

The invention aims to provide a segmented spiral rubber bag hole sealing device to solve the problems that in the prior art, the hole sealing length of a water injection drill hole for a soft coal seam does not reach the standard and the hole sealing device cannot be recycled repeatedly.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the utility model provides a segmentation spiral rubber bag hole sealing device, including water injection pipe, spiral rubber bag, pipe end jointing device, reamer bit, check valve and sealing device, wherein:

the water injection pipe comprises a water injection front end pipe, a plurality of water injection filling pipes and a water injection terminal pipe which are connected with each other in sequence from front to back, the water injection front end pipe, the water injection filling pipes and the water injection terminal pipe are of the same structure and are all of an internal hollow structure, helical blades are arranged on the outer wall of each water injection front end pipe, and more than 2 water through holes are formed in the outer wall of each water injection front end pipe;

the spiral rubber bag is in a strip shape with a hollow inner part, two ends of the spiral rubber bag are sealed, the spiral rubber bag is wound on the outer wall of the water injection pipe between the spiral blades, and water passing holes which are in one-to-one correspondence with the water passing holes are formed in the bottom of the spiral rubber bag;

the pipe end jointing devices are respectively positioned at two end parts of the water injection front end pipe, two end parts of the water injection adding pipe and two end parts of the water injection terminal pipe and are used for realizing the connection between two adjacent water injection pipes;

the hole expanding drill bit is arranged at the front end part of the water injection front end pipe;

the check valve comprises a back pressure check valve arranged in an inner cavity at the front part of the water injection front end pipe and a check valve arranged in an inner cavity at the rear part of the water injection rear end pipe;

the sealing devices are respectively arranged at the front end part of the water injection front end pipe, the front end part of the water injection filling pipe and the front end part of the water injection terminal pipe.

The bottom of the spiral rubber bag is fixedly connected with the outer wall of the water injection pipe in a bonding or vulcanizing manner.

The length of water injection front end pipe, water injection filling and connecting pipe, water injection terminal pipe are all 1 ~ 3m, and the external diameter is all 50 ~ 200mm, and the material all selects metal or plastic material.

The lead angle alpha of the helical blade is 20 degrees ~ 30 degrees.

The pipe end connecting device is an internal thread sleeve and an external thread sleeve head which are mutually matched for use or a bayonet pin and a clamping sleeve which are mutually matched for use.

The water injection front end pipe is provided with an external thread sleeve head, the water injection filling pipe is provided with an internal thread sleeve head, the external thread sleeve head is respectively arranged at the front part of the water injection front end pipe, the front part of the water injection filling pipe and the front part of the water injection terminal pipe, and the internal thread sleeve head is respectively arranged at the rear part of the water injection front end pipe, the rear part of the water injection filling pipe and the rear part of.

The reaming bit is of a conical semi-hollow structure, a guide screw is processed on the outer wall of the reaming bit, an internal thread sleeve matched with an external thread sleeve head at the front part of the water injection front end pipe is also processed at the rear part of the reaming bit, more than 2 water outlet inclined holes are formed in the pipe wall of the reaming bit, and the water outlet direction of each water outlet inclined hole is opposite to the rotating direction of the reaming bit.

The spiral direction of the guide spiral is consistent with that of the spiral blade, and the lead angle beta of the guide spiral is the same as the lead angle alpha of the spiral blade.

The number of the water injection adding pipes is in direct proportion to the depth of the water injection drill hole.

The sealing device is an O-shaped sealing ring which is respectively sleeved on the thread shoulder parts in the front-end external thread sleeve heads of the water injection front-end pipe, the water injection filling pipe and the water injection terminal pipe.

In the description of the present specification and examples, the direction toward the coal body is referred to as the front, and the direction away from the coal body is referred to as the rear.

The invention has the beneficial effects that: (1) because set up a plurality of water injection and add the takeover in the centre of water injection front end pipe and water injection terminal pipe, and the water injection adds the number of takeover and is directly proportional with the degree of depth of water injection drilling, can freely add the length of connecing the water injection pipe along with the degree of depth of water injection drilling, can adapt to the requirement to the hole sealing of soft coal seam long distance, facilitate the use. (2) Spiral rubber bag winding is on the water injection pipe outer wall between the helical blade, and the outer wall fixed connection of mode and water injection pipe of bonding or vulcanization is passed through to the bottom of spiral rubber bag, and after the hole sealing, the rig drives water injection pipe clockwise turning, applys outside drawing force simultaneously, and the garrulous coal in the drilling is discharged gradually along with helical blade's revolving force on each section pipeline, conveniently retrieves hole sealing device, realizes reuse, practices thrift the cost.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a perspective view of a water injection filling pipe;

FIG. 3 is a perspective view of the spiral rubber bladder;

FIG. 4 is a schematic longitudinal sectional view of a water injection front pipe with a spiral rubber bag and a back pressure check valve installed thereon;

FIG. 5 is a schematic longitudinal sectional view of the water injection filling pipe after the spiral rubber bladder is installed;

FIG. 6 is a schematic longitudinal sectional view of the water injection terminal pipe after installation of the spiral rubber bladder and the check valve;

fig. 7 is a schematic cross-sectional view of a reamer bit.

Reference numerals: the water injection device comprises a hole expanding drill bit 1, a water injection front end pipe 2, a water injection adding pipe 3, a water injection terminal pipe 4, a spiral rubber bag 5, a back pressure one-way valve 6, a check one-way valve 7, a guide spiral 8, a water outlet inclined hole 9, an external thread sleeve 10, an internal thread sleeve 11, a spiral blade 12, an O-shaped sealing ring 13, a water through hole 14 and a water through hole 15.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clear, embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

As shown in figures 1 and 2, the hole sealing device comprises a reamer bit 1, a water injection front end pipe 2, a plurality of water injection filling connection pipes 3 which are connected in sequence from front to back, a water injection terminal pipe 4 and a spiral rubber bag 5, the water injection front end pipe 2, the water injection filling connection pipes 3 and the water injection terminal pipe 4 are in the same structure and are in an internal hollow structure, spiral blades 12 are arranged on the outer wall, a lift angle alpha of each spiral blade 12 is 20 degrees ~ 30 degrees, the lift angle is an included angle between a tangent line of a spiral line and a plane vertical to a thread axis, more than 2 water through holes 14 are formed in the outer wall, the water injection front end pipe 2, the water injection filling connection pipe 3 and the water injection terminal pipe 4, the lengths of the three pipe fittings are 1 m and 1 ~ 3m, the outer diameters are all 50 ~ 200mm, the materials are all selected from metal or plastic materials, the reamer bit 1 is installed at the front end part of the water injection front end pipe 2, a back inner cavity of the water injection front end pipe 2, a back end pipe 2 is provided with a back pressure valve 6, the inner cavity of the water injection front end pipe 4, the water injection end pipe 4 is provided with a spiral water injection plug, the spiral rubber bag, the spiral water injection plug 4, the spiral water injection plug is connected with the water injection plug 2, the spiral rubber bag, the water injection plug 2, the spiral plug 2, the water injection plug 2, the plug is connected with the spiral plug 2, the plug 4, the plug 2, the plug is connected with the spiral plug 2, the plug 7 of the plug is connected with the plug, the plug 7 of the spiral plug, the plug 4, the spiral plug 4, the plug 7 of the plug 4, the plug is connected with the plug 5, the plug 2, the plug 2, the plug is connected with the plug 2, the plug is connected with the plug 2, the plug is connected with the plug, the plug 2, the plug is connected with the plug, the plug 2, the plug 7.

When the segmented spiral rubber bag hole sealing device is used, a deep hole drilling machine is used for drilling water injection holes into a lower coal seam by using a matched drill rod and a drill bit according to the pre-designed hole spacing in an upper air way of a working surface to be injected with water, and when the drilled holes reach the designed depth, the drill rod and the drill bit are drawn out. Then, the original drilling machine is firstly replaced with a water injection front end pipe 2 with a hole expanding drill bit 1, the drilling machine is used as a power source to rotate clockwise, the drilling machine is gradually placed into a drilled water injection hole, when the drilling machine is placed to a proper depth, the rear end of the water injection front end pipe 2 is additionally connected with a first water injection adding pipe 3, and the water injection adding pipe continues to be screwed into the hole; the number of the water injection connecting pipes 3 is determined according to the depth of the drill hole, and finally the water injection terminal pipe 4 is screwed into the drill hole; and after the water injection terminal pipe 4 is screwed into the coal bed completely, the drilling machine is removed, and a high-pressure water source is connected to the rear end of the water injection terminal pipe 4, so that the water injection work of the coal bed can be carried out. In the water injection process, due to the action of the backpressure one-way valve 6, water in the water injection pipe is boosted and flows into the spiral rubber bag 5 through the water through holes 14 and the water through holes 15 in sequence, and the spiral rubber bag 5 expands to expand the drilled holes in the coal body, so that the hole sealing effect is realized. Meanwhile, the water flow exceeding the pressure of the back pressure one-way valve 6 flows through the back pressure one-way valve 6 and is injected into the coal seam through the water outlet inclined hole 9 on the reamer bit 1. After water injection is finished, stabilizing for a period of time, manually and inwards extruding steel balls on the check valve 7 to completely release water pressure in each pipeline, then driving the water injection pipe to rotate clockwise by the drilling machine, simultaneously applying outward drawing force, gradually discharging broken coal in a drill hole along with the rotating force of the helical blade 12 on each pipeline, and gradually drawing out the water injection terminal pipe 4, the water injection adding pipe 3 and the water injection front end pipe 2 one by one, wherein at the moment, hole sealing, water injection and recovery work are completely finished.

The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple and modified solution of the present invention falls within the protection scope of the present invention, for example, the tube end joining device may also adopt a matched bayonet and a sleeve in addition to the external thread sleeve and the internal thread sleeve shown in the embodiments and the attached drawings, and the sealing device may also be a sealing gasket which is installed on the front end of the water injection front end tube, the water injection connecting tube, and the water injection terminal tube in addition to the O-ring seal shown in the embodiments.