A stable blasting hole drilling device for coal mines

Abstract

The present invention relates to the technical field of drilling equipment, and particularly relates to a stable blasting hole drilling equipment for coal mines. A mobile platform, on which a moving device is installed, and a motor is installed on the driving device; a drill rod is installed on the output shaft of the motor, and a drill bit is fixedly connected to the drill rod; there are several liquid supplement heads distributed circumferentially, and they are all fixedly connected to the outside of the drill rod. The liquid supplement heads are used to additionally supplement anti-collapse liquid medicine to the hole wall, and a pressurization assembly is arranged on the liquid supplement heads, and the pressurization assembly is used to increase the pressure of the liquid medicine in the liquid supplement heads penetrating into the hole wall; a detection mechanism is arranged outside the drill rod. When drilling in a dense rock formation, the present invention only uses a low-concentration liquid medicine to reduce the influence of the anti-collapse liquid medicine on the drilling efficiency of the drill bit. When encountering a loose and fragile rock formation, the anti-collapse liquid medicine is timely supplemented into the drill hole through the liquid supplement heads to enhance the stability of the hole wall.

Description

Technical Field

[0001] The invention relates to the technical field of drilling equipment, and in particular to a stable blast hole drilling equipment used in coal mines. Background Art

[0002] In the process of underground excavation and development in coal mines, it is often necessary to use underground drilling equipment for directional drilling to drill detection holes, blasting holes, etc., and some specific liquid medicines are usually mixed with cooling water and discharged into the hole wall during the drilling process (for example, anti-collapse agents and wall-fixing agents used to form a protective film on the surface of the hole wall to prevent the peeling and collapse of mudstone or other weak strata) to enhance the stability of the hole wall. However, due to the different distribution of rock formations in different coal mines, if the rock formation is relatively dense, it is not necessary to add too much anti-collapse liquid medicine, otherwise it will cause the viscosity of the drilling fluid to increase, reduce the rotation speed of the drill bit, affect the drilling efficiency of the drill bit, and increase the wear of the drill tool. If the rock formation is relatively loose and fragile, it is necessary to increase the amount of anti-collapse liquid medicine (mainly anti-collapse agent and wall-fixing agent), otherwise it is easy to collapse the hole due to the loose hole wall, affecting the construction progress of underground excavation and development in coal mines. The amount of anti-collapse liquid medicine used in existing devices is usually determined in advance, and it is difficult to adapt and adjust in time during the drilling process. Summary of the invention

[0003] In order to overcome the disadvantage that the amount of anti-collapse liquid used in existing devices is usually determined in advance and difficult to adapt and adjust in time during the drilling process, the present invention provides a stable blasting hole drilling equipment for coal mines.

[0004] The technical solution of the present invention is as follows:

[0005] A stable blasting hole drilling equipment for coal mines, comprising: a mobile platform, on which a mobile device and a driving device are installed, and a motor is installed on the driving device; a drill rod, installed on the output shaft of the motor, a drill bit is fixedly connected to the end of the drill rod away from the motor, and the drill rod and the drill bit are jointly provided with a liquid spraying device; a plurality of liquid replenishing heads distributed circumferentially, all of which are fixedly connected to the outside of the drill rod, the liquid replenishing head is used to additionally replenish anti-collapse liquid to the hole wall, the liquid replenishing head and the liquid spraying device are both connected to an external liquid supply system, a boosting component is provided on the liquid replenishing head, and the boosting component is used to increase the pressure of the liquid in the liquid replenishing head to penetrate into the hole wall; a detection mechanism is arranged outside the drill rod, and is used to detect the pressure of the liquid sprayed out of the borehole, and then control whether the liquid replenishing head is connected to the external liquid supply system.

[0006] Further, the pressurization assembly includes: a liquid-sealing shell, slidably connected to the liquid replenishing head, and the liquid-sealing shell is used to assist the anti-collapse liquid medicine to penetrate towards the hole wall; a first fixed wheel set, having several, all installed on the side of the liquid-sealing shell away from the drill pipe; a fluctuation assembly, arranged in the corresponding liquid-sealing shell, and used to make the liquid medicine in the liquid-sealing shell penetrate into the hole wall in a fluctuating manner.

[0007] Further, several first spring telescopic rods are fixedly connected to the side of the liquid-sealing shell away from the drill pipe, a sliding wheel set is installed at the telescopic end of the first spring telescopic rod, and a connecting piece is fixedly connected between the sliding wheel set and the adjacent first fixed wheel set.

[0008] Further, the liquid-sealing shell is fixedly connected with symmetrically distributed extrusion rods, and the extrusion rods are used to compact the soft hole wall.

[0009] Further, the fluctuation assembly includes: an airbag, fixedly connected to the corresponding liquid-sealing shell, and the airbag is provided with a convex part; a fixed folding plate, fixedly connected to the corresponding liquid-sealing shell near the convex part of the airbag, and used to separate the convex part of the airbag from other positions, the fixed folding plate is slidably connected with an extrusion plate, and the extrusion plate is used to extrude the convex part of the airbag; a driving component, arranged in the corresponding liquid-sealing shell, and used to periodically drive the extrusion plate to extrude the convex part of the airbag.

[0010] Further, the driving component includes: a rotating disk, installed on the first fixed wheel set; a connecting rod, rotatably connected to the rotating disk, and the connecting rod is slidably connected with the extrusion plate.

[0011] Further, the detection mechanism includes: several first hydraulic telescopic rods, circumferentially distributed, all fixedly connected to the drill pipe, the telescopic end of the first hydraulic telescopic rod is fixedly connected to the corresponding liquid-sealing shell; several second hydraulic telescopic rods, respectively fixedly connected to the outside of the drill pipe, the second hydraulic telescopic rods are communicated with the corresponding first hydraulic telescopic rods; a sliding ring, slidably connected to the outside of the drill pipe, the telescopic end of the second hydraulic telescopic rod is fixedly connected to the sliding ring, and a spring is installed between the fixed part of the second hydraulic telescopic rod and the sliding ring, the sliding ring is fixedly connected with a liquid-blocking cover; a triggering component, having several, all arranged on the side of the drill pipe close to the corresponding liquid replenishing head, and used to control whether the liquid replenishing head is communicated with an external liquid supply system.

[0012] Further, the liquid-blocking cover is made of a flexible material, the sliding ring is fixedly connected with circumferentially distributed second spring telescopic rods, a weight is fixedly connected to the telescopic end of the second spring telescopic rod, the weight at the telescopic end of the second spring telescopic rod is fixedly connected with the liquid-blocking cover, and a second fixed wheel set is installed on the weight of the second spring telescopic rod.

[0013] Further, a through hole is provided on one side of the liquid baffle near the drill pipe, reducing the probability of drill cuttings being intercepted inside the liquid baffle.

[0014] Further, the triggering assembly includes: a liquid baffle valve fixedly connected to one side of the drill pipe near the corresponding liquid supplement head. A liquid supply pipe is fixedly connected to the drill pipe, and the liquid supply pipe is communicated with an external liquid supply system. The liquid supply pipe is communicated with the liquid supplement head through the liquid baffle valve. A rotating plate is fixedly connected to the valve core of the liquid baffle valve; a fixed block is fixedly connected to the outer side of the drill pipe. A sliding member is slidably connected to the fixed block, and a tension spring is fixedly connected between the two. The sliding member contacts the sliding ring. A sliding block is slidably connected to the rotating plate, and a rotating block is rotatably connected to the sliding block. The sliding member is fixedly connected to the rotating block.

[0015] The beneficial technical effects of the present invention:

[0016] When the present invention drills in a dense rock formation, only a low-concentration liquid medicine is used to reduce the influence of anti-collapse liquid medicine on the drilling efficiency of the drill bit. When encountering a loose and fragile rock formation, anti-collapse liquid medicine is timely supplemented into the drill hole through the liquid supplement head to enhance the stability of the hole wall.

[0017] The present invention restricts the flow path of the anti-collapse liquid medicine through the liquid sealing shell, fully increasing the efficiency of the anti-collapse liquid medicine infiltrating into the hole wall, thereby quickly improving the stability of the hole wall. At the same time, the air bag is used to periodically apply pressure to the anti-collapse liquid medicine, increasing the collision frequency between the anti-collapse liquid medicine molecules and the wall surface, thereby strengthening the interaction between the two to increase the bonding rate of the anti-collapse liquid medicine and the hole wall, further improving the stability of the hole wall.

[0018] The present invention jointly seals part of the drill hole through the sliding ring and the liquid baffle, enhancing the detection accuracy of the liquid pressure in the drill hole of the device. At the same time, the device automatically adapts to drill holes of different diameters, increasing the applicable range of the device, saving the cost of synchronously replacing other components when replacing the drill bit, and thus increasing the economic benefits of the device. Description of the Drawings

[0019] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 is a three-dimensional structural schematic diagram of the drill pipe, drill bit and liquid sealing shell of the present invention;

[0021] Figure 3 is a cross-sectional view of the drill pipe and drill bit of the present invention;

[0022] Figure 4 is a three-dimensional structural schematic diagram of the liquid supplement head and liquid sealing shell of the present invention;

[0023] Figure 5Schematic three-dimensional structure diagram of the liquid replenishing head, liquid sealing shell and extrusion plate of the present invention;

[0024] Figure 6 Exploded view of the liquid sealing shell, airbag and extrusion plate of the present invention;

[0025] Figure 7 Schematic three-dimensional structure diagram of the liquid sealing shell and airbag of the present invention;

[0026] Figure 8 For the present invention Figure 7 Schematic three-dimensional structure diagram of the position A in the present invention;

[0027] Figure 9 For the present invention Figure 7 Schematic three-dimensional structure diagram of the position B in the present invention;

[0028] Figure 10 Schematic three-dimensional structure diagram of the second hydraulic telescopic rod, sliding ring and liquid blocking cover of the present invention;

[0029] Figure 11 Cross-sectional view of the sliding ring and liquid blocking cover of the present invention;

[0030] Figure 12 Schematic three-dimensional structure diagram of the rotating plate, fixed block and sliding member of the present invention.

[0031] Reference signs in the drawings: 1: moving platform, 2: driving device, 3: motor, 4: drill pipe, 5: drill bit, 51: liquid spraying head, 52: liquid infusion pipe, 6: liquid replenishing head, 7: liquid sealing shell, 71: first fixed wheel set, 72: fixed folding plate, 73: extrusion rod, 8: first spring telescopic rod, 81: sliding wheel set, 82: connecting member, 9: airbag, 10: extrusion plate, 101: rotating disc, 102: connecting rod, 11: liquid supply pipe, 12: first hydraulic telescopic rod, 13: second hydraulic telescopic rod, 14: sliding ring, 15: liquid blocking cover, 16: second spring telescopic rod, 17: second fixed wheel set, 18: liquid blocking valve, 19: rotating plate, 20: fixed block, 21: sliding member, 22: sliding block, 23: rotating block. Detailed implementation manners

[0032] To make the objectives, technical solutions and beneficial effects of the present invention clearer and more understandable, the following further elaborates on the present invention in detail with reference to specific embodiments and the accompanying drawings. Some but not all of the embodiments of the present invention will be described more comprehensively with reference to the attached drawings later. In fact, the various embodiments of the present invention can be implemented in many different forms and should not be construed as limited to the embodiments described herein; on the contrary, these embodiments are provided to make the present invention meet the applicable legal requirements.

[0033] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "inside", "outside", "upper", "lower", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. It 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, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0034] A stable blasting hole drilling device for coal mines, as Figures 1-6 shown, includes: a mobile platform 1, on which a mobile device and a driving device 2 are installed, and a motor 3 is installed on the driving device 2; a drill pipe 4, which is installed on the output shaft of the motor 3, and a drill bit 5 is fixedly connected to the end of the drill pipe 4 away from the motor 3. A liquid spraying device is provided for the drill pipe 4 and the drill bit 5 together; a liquid replenishing head 6, with a number of circumferentially distributed ones, is fixedly connected to the outside of the drill pipe 4. The liquid replenishing head 6 is used to additionally replenish anti-collapse liquid medicine to the hole wall. Both the liquid replenishing head 6 and the liquid spraying device are communicated with an external liquid supply system. A pressure increasing component is provided on the liquid replenishing head 6, and the pressure increasing component is used to increase the pressure of the liquid medicine in the liquid replenishing head 6 penetrating into the hole wall; a detection mechanism is provided outside the drill pipe 4 and is used to detect the pressure of the liquid medicine spraying out of the drilling hole, so as to control whether the liquid replenishing head 6 is communicated with the external liquid supply system.

[0035] In the above solution, the mobile device is set as a multi-functional crawler, which facilitates the device to adapt to various complex underground environments. The driving device 2 is a conventional hydraulic telescopic frame structure, which is used to adjust the direction and position of the drill pipe 4 and drive the drill pipe 4 to drill into the rock wall. Functional components such as a control terminal, a liquid storage barrel, and a power supply device are also arranged on the mobile platform 1. The liquid supply system includes several hydraulic pumps, several pressure maintaining devices, liquid pipelines, etc. The liquid spraying device includes several liquid spraying heads 51 and several liquid infusion pipes 52. All the liquid infusion pipes 52 are communicated with the liquid supply system, the liquid spraying heads 51 and the liquid infusion pipes 52 are communicated, and the liquid spraying heads 51 are fixedly connected to the drill bit 5. The liquid spraying device is used to spray low-concentration liquid medicine into the drill hole. The low-concentration liquid medicine is mainly used to cool the drill bit 5 and flush the drill cuttings out of the drill hole along the drill hole. The low-concentration liquid medicine usually contains a lower concentration of anti-collapse agent and hole wall stabilizing agent (the anti-collapse agent and hole wall stabilizing agent are mainly used to form a protective film on the surface of the hole wall to prevent the peeling and collapse of mudstone or other soft strata), and a higher content of anti-sticking agent and flocculant (the anti-sticking agent is used to reduce the friction coefficient between the drill tool and the hole wall, and the flocculant is mainly used to promote the aggregation of fine particles into larger lumps to facilitate flushing the drill cuttings out of the drill hole and maintaining the cleanliness of the hole). The liquid replenishing head 6 is used to additionally replenish anti-collapse type liquid medicine into the drill hole without adding other liquid medicines such as anti-sticking agent and flocculant. The liquid supply system is always maintained at a certain liquid pressure through the pressure maintaining device at the connection with the liquid replenishing head 6. Therefore, when the detection mechanism controls the connection between the liquid replenishing head 6 and the liquid supply system, the liquid supply system immediately transports anti-collapse type liquid medicine into the liquid replenishing head 6. The mobile device, the driving device 2, the motor 3, and the external liquid supply system are all electrically connected to the control terminal.

[0036] Further, as Figures 4-6 shown, the pressurizing assembly includes: a liquid sealing shell 7, slidably connected to the liquid replenishing head 6, and the liquid sealing shell 7 is used to assist the anti-collapse type liquid medicine to penetrate towards the hole wall; a first fixed wheel set 71, having several, all installed on the side of the liquid sealing shell 7 away from the drill pipe 4; a fluctuation assembly, arranged in the corresponding liquid sealing shell 7, and used to make the liquid medicine in the liquid sealing shell 7 penetrate into the hole wall in a wave-like manner.

[0037] Further, as Figures 3-6 shown, several first spring telescopic rods 8 are fixedly connected to the side of the liquid sealing shell 7 away from the drill pipe 4. The telescopic ends of the first spring telescopic rods 8 are installed with sliding wheel sets 81, and a connecting member 82 is fixedly connected between the sliding wheel sets 81 and the adjacent first fixed wheel set 71.

[0038] Further, as Figures 4-6 shown, the liquid sealing shell 7 is fixedly connected with symmetrically distributed extrusion rods 73, and the extrusion rods 73 are used to compact the soft hole wall.

[0039] In the above solution, the liquid-sealing shell 7 is an arc-shaped shell, and the opening of the arc-shaped shell is located on the side away from the drill pipe 4. Both the first fixed wheel set 71 and the sliding wheel set 81 are composed of a housing for easy installation and a rotating wheel. At least four first fixed wheel sets 71 are installed on one liquid-sealing shell 7, and the four first fixed wheel sets 71 are respectively located at the four top corners corresponding to the opening of the liquid-sealing shell 7. At least two first spring telescopic rods 8 and two sliding wheel sets 81 are installed on one liquid-sealing shell 7. Both the first fixed wheel set 71 and the sliding wheel set 81 are used to reduce the friction between the liquid-sealing shell 7 and the hole wall. The connecting piece 82 is made of a flexible material (such as rubber material). The sliding wheel set 81 always fits against the hole wall under the action of the corresponding first spring telescopic rod 8. The sliding wheel set 81 pulls the connecting piece 82 towards the hole wall to fill the gap between the liquid-sealing shell 7 and the hole wall, increasing the pressure of the liquid medicine in the liquid-sealing shell 7, and thus increasing the probability of the liquid medicine in the liquid-sealing shell 7 penetrating into the hole wall.

[0040] The working process is as follows: When the staff is preparing to drill a blasting hole on the rock wall, the staff first moves this device to the rock wall through the moving device. Subsequently, the staff operates the driving device 2 through the control terminal to move, aligning the drill pipe 4 with the direction of the predetermined drilling hole. Then, the staff starts the motor 3 through the control terminal. The output shaft of the motor 3 drives the drill pipe 4 and the drill bit 5 to rotate. The control terminal drives the drill pipe 4 and the drill bit 5 to advance into the rock wall through the driving device 2, and controls the external liquid supply system to supply low-concentration liquid medicine into the liquid spraying head 51 through the liquid delivery pipe 52. The drill pipe 4 and the drill bit 5 gradually drill into the interior of the rock wall.

[0041] When the liquid replenishing head 6, the liquid-sealing shell 7 and the detection mechanism enter the inner wall of the drilling hole together, the detection mechanism judges the pressure and speed of the liquid medicine penetrating into the hole wall by detecting the pressure of the liquid medicine spraying outwards. If the rock formation inside the rock wall is relatively dense and complete, it is difficult for the low-concentration liquid medicine sprayed out from the liquid spraying head 51 to penetrate towards the inner wall of the drilling hole. A large amount of the low-concentration liquid medicine sprays outwards along the hole wall. The detection mechanism detects that the pressure of the liquid medicine spraying outwards is relatively large. At this time, the liquid replenishing head 6 is not connected to the external liquid supply system, and the liquid-sealing shell 7 is located on the side close to the drill pipe 4. The components on the liquid-sealing shell 7 do not contact the hole wall. Therefore, only low-concentration liquid medicine exists in the hole wall, avoiding a large waste of anti-collapse liquid medicine.

[0042] When the rock strata inside the rock wall are relatively loose, when the low-concentration liquid medicine enters the inner wall of the drill hole, part of the liquid medicine will penetrate into the hole wall under the action of the liquid pressure. At this time, the amount of liquid medicine sprayed out from the hole wall decreases, and the detection mechanism detects that the pressure of the liquid medicine sprayed out decreases. When the detection mechanism detects that the liquid medicine pressure decreases to a certain value (the specific value can be adjusted according to the actual situation), the detection mechanism controls the liquid replenishing head 6 to communicate with the external liquid supply system, and controls all the liquid sealing shells 7 to move towards the side close to the hole wall until all the first fixed wheel sets 71 are in contact with the hole wall. At this time, the sliding wheel set 81 is in close contact with the hole wall under the elastic force of the first spring telescopic rod 8. The first fixed wheel set 71 and the sliding wheel set 81 continuously roll along the hole wall during the rotation of the liquid sealing shell 7 and the drill rod 4. The connecting piece 82 drives by the sliding wheel set 81 to reduce the gap between the liquid sealing shell 7 and the hole wall. After the external liquid supply system is connected to the liquid replenishing head 6, anti-collapse liquid medicine is replenished into the liquid replenishing head 6. The anti-collapse liquid medicine directly enters the cavity of the liquid sealing shell 7 through the liquid replenishing head 6. At this time, the anti-collapse liquid medicine cannot be immediately discharged outward from the opening of the liquid sealing shell 7 (the gap between the cavity in the liquid sealing shell 7 and the hole wall is small). The anti-collapse liquid medicine gradually accumulates pressure in the cavity between the liquid sealing shell 7 and the hole wall and penetrates into the hole wall in large quantities, making the hole wall more firm and stable, reducing the probability of hole collapse. It becomes increasingly difficult for the low-concentration liquid medicine to penetrate into the hole wall. The detection mechanism detects that the pressure of the liquid medicine sprayed out gradually rises, and timely disconnects the connection state between the external liquid supply system and the liquid replenishing head 6 to avoid a large amount of waste of liquid medicine. The detection mechanism drives the liquid sealing shell 7 to retract and reset towards the drill rod 4. The remaining anti-collapse liquid medicine in the liquid sealing shell 7 diffuses into the low-concentration liquid medicine to further consolidate the hole wall.

[0043] When the hole wall of the drill hole is too loose, a large amount of liquid medicine penetrates into the hole wall and it is difficult to spray out along the hole wall. The staff observes that there is no sprayed liquid medicine in the drill hole and timely controls the driving device 2 to stop drilling into the hole wall through the control terminal, and only controls the motor 3 to drive the drill rod 4 to rotate. At this time, due to the overly loose hole wall, the first fixed wheel set 71 and the sliding wheel set 81 gradually sink into the hole wall during the rotation of the liquid sealing shell 7. At this time, the extrusion rod 73 contacts the hole wall and compacts the hole wall during the circumferential rotation following the liquid sealing shell 7. After the drill rod 4 rotates for a certain period of time, if the inner wall of the drill hole is corrected to a relatively firm state by the anti-collapse liquid medicine and the liquid medicine sprays out along the drill hole again, the liquid sealing shell 7 is reset under the drive of the detection mechanism, and the components on the liquid sealing shell 7 are no longer in contact with the hole wall. The staff controls the driving device 2 to drill into the hole wall again through the control terminal. If the inner wall of the drill hole is still in a soft state, the staff stops drilling at this hole wall and controls the driving device 2 to pull out the drill rod 4 through the control terminal, and then the staff re-plans the drill hole position.

[0044] After the drilling is completed, the staff controls the driving device 2 to pull out the drill rod 4 through the control terminal, and closes the motor 3 and the external liquid supply system through the control terminal.

[0045] Furthermore, as shown in Figures 4-7 , the fluctuation component includes: an airbag 9 fixedly connected inside the corresponding liquid-sealing shell 7, and the airbag 9 is provided with a convex portion; a fixed folding plate 72 fixedly connected inside the corresponding liquid-sealing shell 7 near the convex portion of the airbag 9 for separating the convex portion of the airbag 9 from other positions, and the fixed folding plate 72 is slidably connected with a pressing plate 10 for pressing the convex portion of the airbag 9; a driving component arranged inside the corresponding liquid-sealing shell 7 for periodically driving the pressing plate 10 to press the convex portion of the airbag 9.

[0046] Furthermore, as shown in Figures 7-9 , the driving component includes: a rotating disk 101 installed on the first fixed wheel set 71; a connecting rod 102 rotatably connected to the rotating disk 101, and the connecting rod 102 is slidably connected with the pressing plate 10.

[0047] In the above solution, the airbag 9 is made of rubber material and is filled with gas in the initial state. One airbag 9 is provided with two convex portions. Therefore, two fixed folding plates 72, two pressing plates 10 and two driving components are arranged on one liquid-sealing shell 7. The fixed folding plate 72 only hinders the corresponding convex portion of the corresponding airbag 9 from expanding outwards and does not restrict other parts of the airbag 9. Two rotating disks 101 and two connecting rods 102 are arranged on one driving component, and the four rotating disks 101 on one liquid-sealing shell 7 correspond to the four first fixed wheel sets 71 one by one.

[0048] Working process: Taking the liquid-sealing shell 7 in Figures 7-9 as an example, when the first fixed wheel set 71 contacts the hole wall, the first fixed wheel set 71 rotates around its own axis during the process of following the rotation of the liquid-sealing shell 7 and the drill pipe 4. The first fixed wheel set 71 drives the corresponding rotating disk 101 to rotate together. The rotating disk 101 drives the connecting rod 102 to reciprocate. During the rotation of the connecting rod 102, it slides back and forth along the pressing plate 10, and at the same time drives the pressing plate 10 to move up and down reciprocally. The pressing plate 10 periodically presses the corresponding convex portion on the airbag 9. When the convex portion on the airbag 9 is pressed, the gas in the airbag 9 is squeezed to the middle of the airbag 9, and the middle of the airbag 9 expands to exert a greater pressure on the anti-collapse liquid medicine in the liquid-sealing shell 7, promoting the anti-collapse liquid medicine in the liquid-sealing shell 7 to penetrate into the hole wall more easily. When the pressing plate 10 moves back to its original position driven by the adjacent connecting rod 102, the gas in the middle of the airbag 9 returns to the convex portion, making the liquid pressure in the liquid-sealing shell 7 return to normal. By making the liquid in the liquid-sealing shell 7 receive periodic pressure and impact the hole wall in a wave-like manner, the efficiency of the anti-collapse liquid medicine penetrating into the hole wall is increased.

[0049] Furthermore, as shown in Figure 4 , Figure 10 and Figure 11As shown in the figure, the detection mechanism includes: a plurality of first hydraulic telescopic rods 12, which are circumferentially distributed and are all fixedly connected to the drill pipe 4. The telescopic ends of the first hydraulic telescopic rods 12 are fixedly connected to the corresponding liquid sealing shells 7; a plurality of second hydraulic telescopic rods 13, which are respectively fixedly connected to the outer side of the drill pipe 4. The second hydraulic telescopic rods 13 are communicated with the corresponding first hydraulic telescopic rods 12; a sliding ring 14, which is slidably connected to the outer side of the drill pipe 4. The telescopic ends of the second hydraulic telescopic rods 13 are fixedly connected to the sliding ring 14, and a spring is installed between the fixed part of the second hydraulic telescopic rod 13 and the sliding ring 14. The sliding ring 14 is fixedly connected with a liquid blocking cover 15; a plurality of trigger components, which are all arranged on one side of the drill pipe 4 close to the corresponding liquid replenishing head 6 and are used to control whether the liquid replenishing head 6 is communicated with an external liquid supply system.

[0050] Further, as Figure 10 and Figure 11 shown in the figure, the liquid blocking cover 15 is made of a flexible material. The sliding ring 14 is fixedly connected with a plurality of second spring telescopic rods 16 distributed circumferentially. The telescopic ends of the second spring telescopic rods 16 are fixedly connected with weights. The weights at the telescopic ends of the second spring telescopic rods 16 are fixedly connected with the liquid blocking cover 15, and a second fixed wheel set 17 is installed on the weights of the second spring telescopic rods 16.

[0051] Further, as Figure 10 shown in the figure, through holes are arranged on one side of the liquid blocking cover 15 close to the drill pipe 4 to reduce the probability of drill chips being intercepted in the liquid blocking cover 15.

[0052] In the above solution, the volume of the first hydraulic telescopic rod 12 is smaller than that of the second hydraulic telescopic rod 13. The first hydraulic telescopic rod 12 and the corresponding second hydraulic telescopic rod 13 are communicated through a hydraulic hose (not shown in the figure). When the telescopic end of the second hydraulic telescopic rod 13 extends forward, the hydraulic oil in the second hydraulic telescopic rod 13 flows into the corresponding first hydraulic telescopic rod 12 through the hydraulic hose, so that the telescopic end of the first hydraulic telescopic rod 12 extends outwards. The elastic coefficient of the spring on the second hydraulic telescopic rod 13 determines the value of the sliding of the sliding ring 14 backwards by the liquid in the drill hole (that is, the value of the liquid medicine pressure detected by the detection mechanism when the detection mechanism controls the liquid replenishing head 6 to be communicated with the external liquid supply system). The spring on the second hydraulic telescopic rod 13 can be replaced according to actual needs. The liquid blocking cover 15 is made of a flexible material, which is convenient for expanding the detection range of the liquid medicine pressure by the liquid blocking cover 15 according to the drill hole diameter. At the same time, by arranging through holes on the inner side of the liquid blocking cover 15, when the drill chips move along the arc surface of the liquid blocking cover 15, they are discharged to the rear side of the drill pipe 4 along the through holes on the liquid blocking cover 15, thereby promoting the drill chips to smoothly discharge outwards along the drill hole. The inside of the second spring telescopic rod 16 is a tension spring, so the second spring telescopic rod 16 is in a completely retracted state in the initial state.

[0053] Workflow; when the drill pipe 4 rotates, the drill pipe 4 drives the sliding ring 14 to rotate together. The sliding ring 14 drives the second spring telescopic rod 16 to rotate together. The weight at the telescopic end of the second spring telescopic rod 16 is subject to a centrifugal force towards the outside of the drill pipe 4. Moreover, the faster the drill pipe 4 rotates, the greater the centrifugal force on the weight at the telescopic end of the second spring telescopic rod 16. Under the action of the weight on it, the telescopic end of the second spring telescopic rod 16 moves towards the outside of the drill pipe 4, and the second spring telescopic rod 16 stretches and stores energy. The telescopic end of the second spring telescopic rod 16 drives the outer sides of the second fixed wheel set 17 and the liquid blocking cover 15 to move outwards together until the second fixed wheel set 17 contacts the hole wall. The second fixed wheel set 17, the telescopic end of the second spring telescopic rod 16, and the liquid blocking cover 15 stop moving together. At this time, the liquid blocking cover 15 blocks most of the gap between the inner hole wall of the drill hole and the drill pipe 4 to increase the detection accuracy of the liquid medicine in the drill hole by the liquid blocking cover 15.

[0054] When the liquid medicine in the drill hole is difficult to penetrate into the hole wall, the liquid medicine pushes the liquid blocking cover 15 and the sliding ring 14 to move backward through liquid pressure. The sliding ring 14 drives the telescopic end of the second hydraulic telescopic rod 13 to move together, causing the spring on the second hydraulic telescopic rod 13 to compress and store energy. The telescopic end of the second hydraulic telescopic rod 13 retracts, extracting the hydraulic oil in the corresponding first hydraulic telescopic rod 12, so that the telescopic end of the first hydraulic telescopic rod 12 drives the liquid sealing shell 7 to retract into the first hydraulic telescopic rod 12. At this time, the trigger assembly controls the liquid filling head 6 to disconnect from the external liquid supply system.

[0055] When part of the liquid medicine in the drill hole penetrates into the hole wall, the liquid pressure on the liquid blocking cover 15 and the sliding ring 14 decreases. The liquid blocking cover 15 and the sliding ring 14 move forward and reset under the action of the spring on the second hydraulic telescopic rod 13. At this time, the telescopic end of the second hydraulic telescopic rod 13 extends forward synchronously. The hydraulic oil in the second hydraulic telescopic rod 13 flows back into the corresponding first hydraulic telescopic rod 12 again. The telescopic end of the first hydraulic telescopic rod 12 drives the liquid sealing shell 7 to extend towards the hole wall until the first fixed wheel set 71 on the liquid sealing shell 7 contacts the hole wall. At this time, the telescopic end of the first hydraulic telescopic rod 12 cannot continue to extend. The sliding ring 14 makes the liquid filling head 6 communicate with the external liquid supply system through the trigger assembly, and the liquid filling head 6 starts to supplement anti-collapse liquid medicine into the cavity of the liquid sealing shell 7.

[0056] When the penetration amount of the liquid medicine in the drill hole into the hole wall decreases, the liquid blocking cover 15 and the sliding ring 14, under the action of the spring of the second hydraulic telescopic rod 13, repeat the above operations according to the above principle to continue detecting the liquid pressure in the drill hole.

[0057] Further, as Figure 9 、 Figure 11 and Figure 12As shown, the trigger assembly includes: a liquid stop valve 18, which is fixedly connected to the side of the drill rod 4 close to the corresponding fluid replenishing head 6, the drill rod 4 is fixedly connected with a liquid supply pipe 11, the liquid supply pipe 11 is connected with the external liquid supply system, the liquid supply pipe 11 is connected with the fluid replenishing head 6 through the liquid stop valve 18, and the valve core of the liquid stop valve 18 is fixedly connected with a rotating plate 19; a fixed block 20, which is fixedly connected to the outer side of the drill rod 4, the fixed block 20 is slidably connected with a sliding member 21, and a tension spring is fixedly connected therebetween, the sliding member 21 is in contact with the sliding ring 14, the rotating plate 19 is slidably connected with a sliding block 22, the sliding block 22 is rotatably connected with a rotating block 23, and the sliding member 21 is fixedly connected to the rotating block 23.

[0058] In the above scheme, the liquid-blocking valve 18 can be any mechanical valve body. In the present invention, the liquid-blocking valve 18 is a ball valve. The sliding member 21 drives the valve core of the liquid-blocking valve 18 to rotate through adjacent components, thereby controlling the liquid-blocking valve 18 to open or close. Figure 12 Take the liquid blocking valve 18 shown as an example: when the rotating block 23 is located at the rear part of the upper side of the liquid blocking valve 18, the liquid blocking valve 18 is in a closed state; when the rotating block 23 is located at the front part of the upper side of the liquid blocking valve 18, the liquid blocking valve 18 is in an open state; the liquid supply system is always connected to the liquid supply pipe 11, and the liquid in the liquid supply pipe 11 is always maintained at a certain liquid pressure through the pressure maintaining device. Therefore, when the liquid blocking valve 18 is connected, the liquid supply system immediately transports anti-collapse liquid into the liquid infusion head 6 through the liquid supply pipe 11 and the liquid blocking valve 18. The elastic coefficient of the tension spring on the sliding member 21 is smaller than the elastic coefficient of the spring on the second hydraulic telescopic rod 13, and the initial state of the tension spring on the sliding member 21 is in a stretched and stored force state.

[0059] Workflow: Figure 11 Take the liquid blocking valve 18 and adjacent components in the example: when the sliding ring 14 is in the initial state, the sliding ring 14 always presses the sliding member 21 under the elastic force of the spring on the second hydraulic telescopic rod 13, and the state of the sliding member 21 is as follows: Figure 11 and Figure 12 As shown, when the sliding ring 14 is pushed backward by the liquid pressure of the medicine, the sliding ring 14 gradually stops squeezing the sliding member 21, and the sliding member 21 moves backward under the action of the tension spring thereon, and the sliding member 21 drives the sliding block 22 and the rotating block 23 to move together, and the rotating block 23 slides along the rotating plate 19 and drives the rotating plate 19 to rotate counterclockwise (from a top-down perspective), so that the valve core of the liquid blocking valve 18 rotates to a closed state. At this time, the anti-collapse medicine cannot flow through the liquid supply pipe 11 to the corresponding liquid infusion head 6.

[0060] When part of the liquid medicine penetrates into the hole wall and causes the sliding ring 14 to slide forward and reset, when the sliding ring 14 contacts and presses the sliding part 21 to move forward together, the tension spring on the sliding part 21 is stretched and stores energy. The sliding part 21 drives the sliding block 22 and the rotating block 23 to move forward together. The rotating block 23 gradually slides along the rotating plate 19 and drives the rotating plate 19 to rotate clockwise (viewed from top to bottom), thereby gradually opening the liquid blocking valve 18. At this time, the anti-collapse liquid medicine flows through the liquid supply pipe 11 to the corresponding liquid replenishing head 6 to reinforce the drilling hole. After the hole wall of the drilling hole is reinforced, the sliding ring 14 and the sliding part 21 move according to the above principle, so that the liquid blocking valve 18 enters the closed state again to save the usage amount of the anti-collapse liquid medicine.

[0061] So far, this embodiment has been described in detail with reference to the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the stable blasting hole drilling equipment for coal mines of the present invention. The specific embodiments described above further elaborate on the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A stable blast hole drilling equipment for coal mines, characterized in that: Included are: A mobile platform, wherein the mobile platform is equipped with a moving device and a driving device, and the driving device is equipped with a motor; A drill rod is mounted on the output shaft of the motor, a drill bit is fixedly connected to one end of the drill rod away from the motor, and a liquid spraying device is provided together with the drill rod and the drill bit; A plurality of fluid replenishing heads are circumferentially distributed and fixedly connected to the outside of the drill pipe. The fluid replenishing heads are used to replenish the anti-collapse liquid to the hole wall. The fluid replenishing heads and the liquid spraying device are both connected to the external liquid supply system. A booster component is provided on the fluid replenishing head. The booster component is used to increase the pressure of the liquid in the fluid replenishing head to penetrate into the hole wall. A detection mechanism, arranged outside the drill rod, for detecting the pressure of the liquid sprayed out of the borehole, and then controlling whether the liquid replenishing head is connected to the external liquid supply system; The booster assembly comprises: A liquid sealing shell is slidably connected to the liquid infusion head, and the liquid sealing shell is used to assist the anti-collapse liquid to penetrate toward the hole wall; A first fixed wheel group, including a plurality of wheels, all of which are installed on a side of the liquid sealing shell away from the drill rod; A wave assembly is arranged in the corresponding liquid sealing shell, and is used to make the liquid in the liquid sealing shell permeate into the hole wall in a wave-like manner; a plurality of first spring telescopic rods are fixedly connected to the side of the liquid sealing shell away from the drill rod, and a sliding wheel group is installed at the telescopic end of the first spring telescopic rod, and a connecting piece is fixedly connected between the sliding wheel group and the adjacent first fixed wheel group; The liquid sealing shell is fixedly connected with symmetrically distributed extrusion rods, and the extrusion rods are used to compact the soft hole wall; The wave component includes: An airbag is fixedly connected to the corresponding liquid sealing shell, and the airbag is provided with a convex portion; A fixed folding plate is fixedly connected to the corresponding liquid sealing shell near the airbag protrusion, and is used to separate the airbag protrusion from other positions. The fixed folding plate is slidably connected to a pressing plate, and the pressing plate is used to press the airbag protrusion; A driving component is disposed in the corresponding liquid sealing shell and is used to periodically drive the extrusion plate to squeeze the airbag protrusion; The driving component comprises: A rotating disk, mounted on the first fixed wheel set; A connecting rod is rotatably connected to the rotating disk, and the connecting rod is slidably connected to the extrusion plate.

2. A stable blast hole drilling device for coal mines according to claim 1, characterized in that: The detection mechanism includes: A first hydraulic telescopic rod, including a plurality of circumferentially distributed rods, all of which are fixedly connected to the drill rod, and a telescopic end of the first hydraulic telescopic rod is fixedly connected to the corresponding liquid sealing shell; A plurality of second hydraulic telescopic rods are respectively fixed to the outside of the drill rod, and the second hydraulic telescopic rods are connected to the corresponding first hydraulic telescopic rods; A sliding ring is slidably connected to the outer side of the drill rod, the telescopic end of the second hydraulic telescopic rod is fixedly connected to the sliding ring, and a spring is installed between the fixed part of the second hydraulic telescopic rod and the sliding ring, and the sliding ring is fixedly connected to a liquid blocking cover; There are several trigger components, all of which are arranged on the side of the drill rod close to the corresponding fluid infusion head, and are used to control whether the fluid infusion head is connected to the external fluid supply system.

3. A stable blast hole drilling device for coal mines according to claim 2, characterized in that: The liquid-blocking cover is made of a flexible material, the sliding ring is fixedly connected with a circumferentially distributed second spring telescopic rod, the telescopic end of the second spring telescopic rod is fixedly connected with a weight block, the weight block at the telescopic end of the second spring telescopic rod is fixedly connected to the liquid-blocking cover, and a second fixed wheel set is installed on the weight block of the second spring telescopic rod.

4. A stable blast hole drilling device for coal mines according to claim 3, characterized in that: A through hole is provided on one side of the liquid-blocking cover close to the drill rod, so as to reduce the probability of drill cuttings being intercepted in the liquid-blocking cover.

5. A stable blast hole drilling device for coal mines according to claim 4, characterized in that: The trigger component includes: A liquid-blocking valve is fixedly connected to a side of the drill rod close to the corresponding liquid-supplementing head, the drill rod is fixedly connected with a liquid supply pipe, the liquid supply pipe is connected with an external liquid supply system, the liquid supply pipe is connected with the liquid-supplementing head through the liquid-blocking valve, and a valve core of the liquid-blocking valve is fixedly connected with a rotating plate; A fixed block is fixedly connected to the outer side of the drill rod, the fixed block is slidably connected to a sliding member, and a tension spring is fixedly connected between the two, the sliding member contacts the sliding ring, the rotating plate is slidably connected to the sliding block, the sliding block is rotatably connected to the rotating block, and the sliding member is fixedly connected to the rotating block.

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