Stable blast hole drilling equipment for coal mine

Abstract

The invention relates to the technical field of drilling equipment, in particular to stable blast hole drilling equipment for a coal mine. The moving platform is provided with a moving device, and the driving device is provided with a motor; the drill rod is mounted on an output shaft of the motor, and the drill rod is fixedly connected with a drill bit; the multiple liquid supplementing heads are distributed in the circumferential direction and fixedly connected to the outer side of the drill rod, the liquid supplementing heads are used for additionally supplementing anti-sloughing liquid medicine to the hole wall, and pressurizing assemblies are arranged on the liquid supplementing heads and used for increasing the pressure, permeating into the hole wall, of the liquid medicine in the liquid supplementing heads; and the detection mechanism is arranged outside the drill rod. When drilling is carried out in a dense rock stratum, only low-concentration chemical liquid is used, the influence of anti-collapse chemical liquid on the drilling efficiency of the drill bit is reduced, and when the drill bit encounters a loose and fragile rock stratum, the anti-collapse chemical liquid is supplemented into a drill hole in time through the liquid supplementing head so as to enhance the stability of a 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: 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.

[0005] Furthermore, the booster component includes: a liquid sealing shell, slidably connected to the liquid replenishing head, the liquid sealing shell is used to assist the anti-collapse liquid to penetrate into the hole wall; a first fixed wheel group, which has a plurality of wheels, all installed on the side of the liquid sealing shell away from the drill rod; a wave component, which is arranged in the corresponding liquid sealing shell, and is used to make the liquid in the liquid sealing shell penetrate into the hole wall in a wave-like manner.

[0006] Furthermore, a plurality of first spring telescopic rods are fixedly connected to a side of the liquid sealing shell away from the drill rod, 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.

[0007] Furthermore, the liquid sealing shell is fixedly connected with symmetrically distributed extrusion rods, and the extrusion rods are used to compact the soft hole wall.

[0008] Furthermore, the wave assembly includes: an airbag, fixedly connected to the corresponding liquid sealing shell, the airbag being provided with a protrusion; a fixed folding plate, fixedly connected to the corresponding liquid sealing shell near the protrusion of the airbag, used to separate the protrusion of the airbag from other positions, the fixed folding plate being slidably connected with an extrusion plate, the extrusion plate being used to extrude the protrusion of the airbag; a driving component, arranged in the corresponding liquid sealing shell, used to periodically drive the extrusion plate to extrude the protrusion of the airbag.

[0009] Furthermore, the driving component includes: a rotating disk installed on the first fixed wheel group; a connecting rod rotatably connected to the rotating disk, and the connecting rod is slidably connected to the extrusion plate.

[0010] Furthermore, the detection mechanism includes: a first hydraulic telescopic rod, having a plurality of circumferentially distributed rods, all of which are fixedly connected to the drill rod, and the telescopic end of the first hydraulic telescopic rod is fixedly connected to the corresponding liquid sealing shell; a second hydraulic telescopic rod, having a plurality of rods, respectively fixedly connected to the outside of the drill rod, and the second hydraulic telescopic rod is connected to the corresponding first hydraulic telescopic rod; a sliding ring, slidably connected to the outside 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; a trigger assembly, having a plurality of rods, all of which are arranged on the side of the drill rod close to the corresponding fluid infusion head, for controlling whether the fluid infusion head is connected to an external fluid supply system.

[0011] Furthermore, the liquid-blocking hood is made of a flexible material, the sliding ring is fixedly connected to a circumferentially distributed second spring telescopic rod, the telescopic end of the second spring telescopic rod is fixedly connected to a weight block, the weight block at the telescopic end of the second spring telescopic rod is fixedly connected to the liquid-blocking hood, and a second fixed wheel set is installed on the weight block of the second spring telescopic rod.

[0012] Furthermore, 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.

[0013] Furthermore, the trigger assembly includes: a liquid stop valve, fixedly connected to a side of the drill rod close to the corresponding fluid replenishing head, the drill rod being fixedly connected with a liquid supply pipe, the liquid supply pipe being connected with an external liquid supply system, the liquid supply pipe being connected with the fluid replenishing head through the liquid stop valve, the valve core of the liquid stop valve being fixedly connected with a rotating plate; a fixed block, fixedly connected to the outer side of the drill rod, the fixed block being slidably connected with a sliding member, and a tension spring being fixedly connected therebetween, the sliding member being in contact with the sliding ring, the rotating plate being slidably connected with a sliding block, the sliding block being rotatably connected with a rotating block, and the sliding member being fixedly connected to the rotating block.

[0014] Beneficial technical effects of the present invention: When drilling in dense rock formations, the present invention only uses low-concentration liquid medicine to reduce the impact of anti-collapse liquid medicine on the drilling efficiency of the drill bit. When encountering loose and fragile rock formations, the anti-collapse liquid medicine is promptly added to the borehole through the liquid replenishing head to enhance the stability of the hole wall.

[0015] The present invention limits the flow path of the anti-collapse liquid by means of a liquid sealing shell, fully increases the efficiency of the anti-collapse liquid penetrating into the hole wall, and further quickly improves the stability of the hole wall. At the same time, an air bag is used to periodically apply pressure to the anti-collapse liquid to increase the frequency of collision between the anti-collapse liquid molecules and the wall surface, thereby strengthening the interaction between the two, thereby increasing the bonding rate of the anti-collapse liquid and the hole wall, and further improving the stability of the hole wall.

[0016] The present invention seals part of the borehole by means of a sliding ring and a liquid blocking cover, thereby enhancing the detection accuracy of the device for the liquid pressure in the borehole, and at the same time enables the device to automatically adapt to boreholes of different apertures, thereby increasing the application scope of the device, saving the expense of simultaneously replacing other components when replacing the drill bit, and thus increasing the economic benefits of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the drill rod, drill bit and liquid sealing shell of the present invention; Figure 3 It is a cross-sectional view of a drill rod and a drill bit of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the liquid replenishing head and the liquid sealing shell of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the liquid replenishing head, the liquid sealing shell and the extrusion plate of the present invention; Figure 6 An exploded view of the liquid sealing shell, the air bag and the extrusion plate of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the liquid sealing shell and the air bag of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the three-dimensional structure at A in the middle; Fig. 9 For the present invention Figure 7 Schematic diagram of the three-dimensional structure at B in the middle; Fig.10 It is a schematic diagram of the three-dimensional structure of the second hydraulic telescopic rod, the sliding ring and the liquid blocking cover of the present invention; Fig.11 It is a cross-sectional view of the sliding ring and the liquid blocking cover of the present invention; Fig.12 It is a schematic diagram of the three-dimensional structure of the rotating plate, the fixed block and the sliding member of the present invention.

[0018] Markings in the accompanying drawings: 1: mobile platform, 2: driving device, 3: motor, 4: drill rod, 5: drill bit, 51: spray head, 52: infusion tube, 6: liquid infusion head, 7: liquid sealing shell, 71: first fixed wheel group, 72: fixed folding plate, 73: extrusion rod, 8: first spring telescopic rod, 81: sliding wheel group, 82: connecting piece, 9: airbag, 10: extrusion plate, 101: rotating disk, 102: connecting rod, 11: liquid supply tube, 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 group, 18: liquid blocking valve, 19: rotating plate, 20: fixed block, 21: sliding piece, 22: sliding block, 23: rotating block. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and beneficial effects of the present invention more clearly understood, the present invention is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. Certain embodiments of the present invention will be described more comprehensively with reference to the accompanying drawings, in which some but not all embodiments will be shown. In fact, the various embodiments of the present invention can be implemented in many different forms and should not be construed as being limited to the embodiments described herein; rather, these embodiments are provided so that the present invention meets applicable legal requirements.

[0020] In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "front", "back" and the like indicate directions or positional relationships based on directions or positional relationships shown in the drawings, and are 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] A stable blast hole drilling device for coal mines, such as Figure 1-Figure 6 As shown, it includes: a mobile platform 1, the mobile platform 1 is equipped with a mobile device and a driving device 2, and a motor 3 is installed on the driving device 2; a drill rod 4, installed on the output shaft of the motor 3, and a drill bit 5 is fixedly connected to the end of the drill rod 4 away from the motor 3, and the drill rod 4 and the drill bit 5 are jointly provided with a liquid spraying device; a liquid replenishing head 6, which has a plurality of circumferentially distributed heads, all of which are fixedly connected to the outside of the drill rod 4, and the liquid replenishing head 6 is used to additionally replenish the anti-collapse liquid to the hole wall. The liquid replenishing head 6 and the liquid spraying device are both connected to the external liquid supply system, and a boosting component is provided on the liquid replenishing head 6. The boosting component is used to increase the pressure of the liquid in the liquid replenishing head 6 to penetrate into the hole wall; a detection mechanism is arranged outside the drill rod 4, and is used to detect the pressure of the liquid sprayed out of the borehole, and then control whether the liquid replenishing head 6 is connected to the external liquid supply system.

[0022] In the above scheme, the mobile device is configured as a multifunctional crawler, so that the device can adapt to various complex underground environments. The driving device 2 is an existing hydraulic telescopic frame structure, which is used to adjust the direction and position of the drill rod 4 and drive the drill rod 4 to drill into the rock wall. The mobile platform 1 is also provided with functional components such as a control terminal, a liquid storage barrel, and a power supply device. The liquid supply system includes a plurality of hydraulic pumps, a plurality of pressure maintaining devices, a liquid pipeline, etc. The liquid spraying device includes a plurality of liquid spraying heads 51 and a plurality of liquid infusion pipes 52. All the liquid infusion pipes 52 are connected to the liquid supply system. The liquid spraying head 51 is connected to the liquid infusion pipe 52. The liquid spraying head 51 is fixed to the drill bit 5. The liquid spraying device is used to spray low-concentration liquid medicine into the borehole. The low-concentration liquid medicine is mainly used to cool the drill bit 5 and flush the drill cuttings out along the borehole. The low-concentration liquid medicine usually contains a relatively low concentration of anti-collapse agent. and wall-fixing agents (anti-collapse agents and wall-fixing agents 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 weak strata), as well as higher content of anti-sticking agents and flocculants (anti-sticking agents are used to reduce the friction coefficient between the drill tool and the hole wall, and flocculants are mainly used to promote the agglomeration of fine particles into larger agglomerates, which is convenient for flushing drill cuttings out of the borehole and maintaining the cleanliness of the hole); the fluid replenishing head 6 is used to additionally replenish the anti-collapse liquid into the borehole, and no other liquids such as anti-sticking agents and flocculants will be added to the borehole. The liquid supply system is always connected to the fluid replenishing head 6 and a certain liquid pressure is always maintained through a pressure maintaining device. Therefore, when the detection mechanism controls the fluid replenishing head 6 to be connected to the fluid supply system, the fluid supply system immediately transports the anti-collapse liquid into the fluid replenishing head 6; the moving device, the driving device 2, the motor 3 and the external fluid supply system are all electrically connected to the control terminal.

[0023] Further, such as Figure 4-Figure 6As shown, the booster component includes: a liquid sealing shell 7, which is slidably connected to the liquid replenishing head 6, and the liquid sealing shell 7 is used to assist the anti-collapse liquid to penetrate into the hole wall; a first fixed wheel group 71, which has a plurality of wheels, all of which are installed on the side of the liquid sealing shell 7 away from the drill rod 4; a wave component, which is arranged in the corresponding liquid sealing shell 7, and is used to make the liquid in the liquid sealing shell 7 penetrate into the hole wall in a wave-like manner.

[0024] Further, such as Figure 3-Figure 6 As shown, a plurality of first spring telescopic rods 8 are fixedly connected to one side of the liquid sealing shell 7 away from the drill rod 4 , a sliding wheel group 81 is installed at the telescopic end of the first spring telescopic rod 8 , and a connecting piece 82 is fixedly connected between the sliding wheel group 81 and the adjacent first fixed wheel group 71 .

[0025] Further, such as Figure 4-Figure 6 As shown, the liquid sealing shell 7 is fixedly connected with symmetrically distributed squeezing rods 73, and the squeezing rods 73 are used to compact the soft hole wall.

[0026] In the above scheme, 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 rod 4. The first fixed wheel group 71 and the sliding wheel group 81 are both composed of a shell and a rotating wheel that are easy to install. At least four first fixed wheel groups 71 are installed on one liquid sealing shell 7, and the four first fixed wheel groups 71 are respectively located at the four vertex corners of the opening of the corresponding liquid sealing shell 7. At least two first spring telescopic rods 8 and two sliding wheel groups 81 are installed on one liquid sealing shell 7. The first fixed wheel group 71 and the sliding wheel group 81 are both 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 group 81 is always in contact with the hole wall under the action of the corresponding first spring telescopic rod 8. The sliding wheel group 81 fills the gap between the liquid sealing shell 7 and the hole wall by pulling the connecting piece 82 toward the hole wall, thereby increasing the pressure of the liquid in the liquid sealing shell 7, thereby increasing the probability of the liquid in the liquid sealing shell 7 penetrating into the hole wall.

[0027] The working process is as follows: when the staff is preparing to drill a blasting hole on the rock wall, the staff first moves the device to the rock wall through the mobile device, and then the staff operates the driving device 2 through the control terminal to move the drill rod 4 to align the drill rod 4 with the predetermined drilling direction, and then the staff starts the motor 3 through the control terminal, and the output shaft of the motor 3 drives the drill rod 4 and the drill bit 5 to rotate, and the control terminal drives the drill rod 4 and the drill bit 5 to move into the rock wall through the driving device 2, and controls the external liquid supply system to supply low-concentration liquid medicine to the spray head 51 through the infusion pipe 52, and the drill rod 4 and the drill bit 5 gradually drill into the rock wall.

[0028] When the liquid replenishing head 6, the liquid sealing shell 7 and the detection mechanism enter the inner wall of the borehole together, the detection mechanism determines the pressure and speed of the liquid infiltration into the hole wall by detecting the pressure of the liquid sprayed outwards. If the rock layer inside the rock wall is relatively dense and complete, the low-concentration liquid sprayed from the liquid spraying head 51 is difficult to penetrate into the inner wall of the borehole, and a large amount of low-concentration liquid is sprayed outwards along the hole wall. The detection mechanism detects that the pressure of the liquid sprayed 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 rod 4. The components on the liquid sealing shell 7 do not contact the hole wall. Therefore, there is only low-concentration liquid in the hole wall, avoiding the situation of large-scale waste of anti-collapse liquid.

[0029] When the rock layer inside the rock wall is relatively loose, when the low-concentration liquid medicine enters the inner wall of the borehole, part of the liquid medicine will penetrate into the borehole wall under the action of liquid pressure. At this time, the amount of liquid medicine sprayed outward from the borehole wall is reduced, and the detection mechanism detects that the pressure of the liquid medicine sprayed outward is reduced. When the detection mechanism detects that the liquid medicine pressure is reduced 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 be connected with the external liquid supply system, and controls all the liquid sealing shells 7 to move to the side close to the borehole wall until all the first fixed wheel groups 71 are in contact with the borehole wall. At this time, the sliding wheel group 81 maintains a fit state with the borehole wall under the elastic force of the first spring telescopic rod 8. The first fixed wheel group 71 and the sliding wheel group 81 continue to roll along the borehole wall while following the rotation of the liquid sealing shell 7 and the drill rod 4. The connecting member 82 shrinks the liquid sealing shell driven by the sliding wheel group 81. 7 and the hole wall, after the external liquid supply system is connected with the liquid replenishing head 6, the anti-collapse liquid is replenished into the liquid replenishing head 6, and the anti-collapse liquid directly enters the cavity of the liquid sealing shell 7 through the liquid replenishing head 6. At this time, the anti-collapse liquid cannot be immediately discharged outwardly 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), and the anti-collapse liquid 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, and low-concentration liquid gradually becomes difficult to penetrate into the hole wall. The detection mechanism detects that the pressure of the liquid sprayed outward gradually rises, and promptly disconnects the connection between the external liquid supply system and the liquid replenishing head 6 to avoid a large amount of liquid waste. The detection mechanism drives the liquid sealing shell 7 to retract and reset to the drill rod 4, and the remaining anti-collapse liquid in the liquid sealing shell 7 diffuses into the low-concentration liquid to further consolidate the hole wall.

[0030] When the borehole wall is too loose, a large amount of liquid medicine penetrates into the borehole wall and is difficult to spray out along the borehole wall. The staff observes that there is no liquid medicine sprayed out of the borehole, and promptly controls the driving device 2 to stop drilling into the borehole 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 looseness of the borehole wall, the first fixed wheel group 71 and the sliding wheel group 81 gradually sink into the borehole wall while following the rotation of the liquid sealing shell 7. At this time, the extrusion rod 73 contacts the borehole wall and presses the borehole wall while following the circumferential rotation of the liquid sealing shell 7. In fact, after the drill rod 4 rotates for a certain period of time, if the inner wall of the borehole is corrected to a relatively firm state by the anti-collapse liquid, the liquid is sprayed outward along the borehole again, and the sealing liquid shell 7 is reset under the drive of the detection mechanism. The parts on the sealing liquid shell 7 are no longer in contact with the hole wall, and the staff controls the driving device 2 to drill into the hole wall through the control terminal. If the inner wall of the borehole is still in a soft state, the staff stops drilling at that location of the hole wall and controls the driving device 2 to pull out the drill rod 4 through the control terminal. Then the staff re-plans the drilling position.

[0031] When the drilling is completed, the staff controls the driving device 2 through the control terminal to pull out the drill rod 4, and turns off the motor 3 and the external fluid supply system through the control terminal.

[0032] Further, such as Figure 4-Figure 7 As shown, the wave assembly includes: an airbag 9, which is fixedly connected to the corresponding liquid sealing shell 7, and the airbag 9 is provided with a protrusion; a fixed folding plate 72, which is fixedly connected to the corresponding liquid sealing shell 7 near the protrusion of the airbag 9, and is used to separate the protrusion of the airbag 9 from other positions, and the fixed folding plate 72 is slidably connected with a squeezing plate 10, and the squeezing plate 10 is used to squeeze the protrusion of the airbag 9; a driving component, which is arranged in the corresponding liquid sealing shell 7, and is used to periodically drive the squeezing plate 10 to squeeze the protrusion of the airbag 9.

[0033] Further, such as Figure 7-Figure 9 As shown, the driving component includes: a rotating disk 101 installed on the first fixed wheel group 71; a connecting rod 102 rotatably connected to the rotating disk 101, and the connecting rod 102 is slidably connected to the extrusion plate 10.

[0034] In the above scheme, the airbag 9 is made of rubber and is filled with gas in the initial state. One airbag 9 is provided with two protrusions, so one liquid sealing shell 7 is provided with two fixed folding plates 72, two extrusion plates 10 and two driving components. The fixed folding plates 72 are only used to prevent the protrusions corresponding to the corresponding airbag 9 from expanding outward, and do not restrict other parts of the airbag 9. One driving component is provided with two rotating disks 101 and two connecting rods 102. The four rotating disks 101 on one liquid sealing shell 7 correspond one to one with the four first fixed wheel groups 71.

[0035] Workflow: Figure 7-Figure 9Taking the sealing shell 7 in the embodiment as an example, when the first fixed wheel set 71 contacts the hole wall, the first fixed wheel set 71 rotates while following the rotation of the sealing shell 7 and the drill rod 4, and the first fixed wheel set 71 drives the corresponding rotating disk 101 to rotate together, and the rotating disk 101 drives the connecting rod 102 to rotate back and forth. During the rotation of the connecting rod 102, it slides forward and backward along the squeezing plate 10, and at the same time drives the squeezing plate 10 to move back and forth up and down, and the squeezing plate 10 periodically squeezes the corresponding protrusion on the airbag 9. When the protrusion on the airbag 9 is squeezed, When pressure is applied, the gas in the airbag 9 is squeezed to the middle part of the airbag 9, and the expansion of the middle part of the airbag 9 exerts greater pressure on the anti-collapse liquid in the liquid sealing shell 7, promoting the anti-collapse liquid in the liquid sealing shell 7 to penetrate into the hole wall more easily. When the squeezing plate 10 moves and resets under the drive of the adjacent connecting rod 102, the gas in the middle part of the airbag 9 returns to the raised part, so that the liquid pressure in the liquid sealing shell 7 returns to normal. By subjecting the liquid in the liquid sealing shell 7 to periodic pressure, it impacts the hole wall in a wave-like manner, thereby increasing the efficiency of the anti-collapse liquid penetrating into the hole wall.

[0036] Further, such as Figure 4 , Fig.10 and Fig.11 As shown, the detection mechanism includes: a first hydraulic telescopic rod 12, which has a plurality of circumferentially distributed rods, all of which are fixedly connected to the drill rod 4, and the telescopic end of the first hydraulic telescopic rod 12 is fixedly connected to the corresponding liquid sealing shell 7; a second hydraulic telescopic rod 13, which has a plurality of rods, respectively fixedly connected to the outside of the drill rod 4, and the second hydraulic telescopic rod 13 is connected to the corresponding first hydraulic telescopic rod 12; a sliding ring 14, which is slidably connected to the outside of the drill rod 4, and the telescopic end of the second hydraulic telescopic rod 13 is 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, and the sliding ring 14 is fixedly connected to the liquid blocking cover 15; a trigger assembly, which has a plurality of rods, all of which are arranged on the side of the drill rod 4 close to the corresponding infusion head 6, and are used to control whether the infusion head 6 is connected to the external liquid supply system.

[0037] Further, such as Fig.10 and Fig.11 As shown, the liquid-blocking cover 15 is made of flexible material, the sliding ring 14 is fixedly connected to a circumferentially distributed second spring telescopic rod 16, the telescopic end of the second spring telescopic rod 16 is fixedly connected to a weight block, the weight block at the telescopic end of the second spring telescopic rod 16 is fixedly connected to the liquid-blocking cover 15, and a second fixed wheel set 17 is installed on the weight block of the second spring telescopic rod 16.

[0038] Further, such as Fig.10 As shown, a through hole is provided on one side of the liquid-blocking cover 15 close to the drill rod 4 , so as to reduce the probability of drill cuttings being intercepted in the liquid-blocking cover 15 .

[0039] In the above scheme, the volume of the first hydraulic telescopic rod 12 is smaller than the volume of the second hydraulic telescopic rod 13. The first hydraulic telescopic rod 12 is connected to the corresponding second hydraulic telescopic rod 13 through a hydraulic hose (not shown in the figure). When the second hydraulic telescopic rod 13 drives the telescopic end to extend forward, the hydraulic oil in the second hydraulic telescopic rod 13 flows from the hydraulic hose to the corresponding first hydraulic telescopic rod 12, so that the telescopic end of the first hydraulic telescopic rod 12 extends outward. The elastic coefficient of the spring on the second hydraulic telescopic rod 13 determines the value of the liquid in the borehole pushing the sliding ring 14 to slide backward (that is, the detection mechanism controls the liquid replenishment in the above content). When the head 6 is connected to the external liquid supply system, the detection mechanism detects the value of the drug liquid pressure), the spring on the second hydraulic telescopic rod 13 can be replaced according to actual needs, and the liquid blocking cover 15 is made of flexible material, which is convenient for expanding the detection range of the drug liquid pressure of the liquid blocking cover 15 according to the diameter of the drill hole. At the same time, by arranging a through hole on the inner side of the liquid blocking cover 15, it is convenient for the drill cuttings to move along the curved surface of the liquid blocking cover 15 and be discharged to the rear side of the drill rod 4 along the through hole on the liquid blocking cover 15, thereby promoting the drill cuttings to be discharged smoothly outward along the drill hole. The second spring telescopic rod 16 has a tension spring inside, so the initial state of the second spring telescopic rod 16 is a fully retracted state.

[0040] Working process: when the drill rod 4 rotates, the drill rod 4 drives the sliding ring 14 to rotate together, and the sliding ring 14 drives the second spring telescopic rod 16 to rotate together, and the weight block at the telescopic end of the second spring telescopic rod 16 is subjected to centrifugal force toward the outside of the drill rod 4, and the faster the drill rod 4 rotates, the greater the centrifugal force is exerted on the weight block at the telescopic end of the second spring telescopic rod 16, and the telescopic end of the second spring telescopic rod 16 moves toward the outside of the drill rod 4 under the action of the weight block thereon, and the second spring telescopic rod 16 is stretched and stores force, and the telescopic end of the second spring telescopic rod 16 drives the second fixed wheel group 17 and the outer side of the liquid blocking cover 15 to move outward together through the weight block until the second fixed wheel group 17 contacts the hole wall, and the second fixed wheel group 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 borehole and the drill rod 4 to increase the detection accuracy of the liquid blocking cover 15 on the liquid in the borehole.

[0041] When the liquid medicine in the borehole is difficult to penetrate into the hole wall, the liquid medicine pushes the liquid blocking cover 15 and the sliding ring 14 to move backwards through the liquid pressure, and the sliding ring 14 drives the telescopic end of the second hydraulic telescopic rod 13 to move together, so that the spring on the second hydraulic telescopic rod 13 is compressed and stored, and the telescopic end of the second hydraulic telescopic rod 13 retracts, and the hydraulic oil in the corresponding first hydraulic telescopic rod 12 is extracted, 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 component controls the liquid infusion head 6 to disconnect from the external liquid supply system.

[0042] When part of the liquid in the borehole penetrates into the hole wall, the liquid pressure on the liquid blocking cover 15 and the sliding ring 14 is reduced, and 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 is synchronously extended forward, and the hydraulic oil in the second hydraulic telescopic rod 13 flows back to the corresponding first hydraulic telescopic rod 12. The telescopic end of the first hydraulic telescopic rod 12 drives the liquid sealing shell 7 to extend toward the hole wall until the first fixed wheel group 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, and the sliding ring 14 determines whether the liquid infusion head 6 is connected to the external liquid supply system through the trigger component, and the liquid infusion head 6 begins to replenish the anti-collapse liquid into the cavity of the liquid sealing shell 7.

[0043] When the penetration of the liquid in the borehole into the hole wall decreases, the liquid shield 15 and the sliding ring 14 repeat the above operation according to the above principle under the action of the spring of the second hydraulic telescopic rod 13 to continue to detect the liquid pressure in the borehole.

[0044] Further, such as Fig. 9 , Fig.11 and Fig.12 As 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.

[0045] 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. Fig.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.

[0046] Workflow: Fig.11Take 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: Fig.11 and Fig.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.

[0047] 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 the sliding part 21 and squeezes the sliding part 21 to move forward together, the tension spring on the sliding part 21 stretches and accumulates force, and the sliding part 21 drives the sliding block 22 and the rotating block 23 to move forward together, and the rotating block 23 gradually slides along the rotating plate 19 and drives the rotating plate 19 to rotate clockwise (from a top-down perspective), 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 infusion head 6 to reinforce the drilled hole. When the wall of the drilled hole is reinforced, the sliding ring 14 and the sliding part 21 are installed to move according to the above principle, so that the liquid blocking valve 18 re-enters the closed state to save the use of the anti-collapse liquid medicine.

[0048] So far, the present embodiment has been described in detail in conjunction with the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the stable blast hole drilling equipment for coal mines of the present invention. The specific embodiments described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in 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 (1), the mobile platform (1) being equipped with a mobile device and a driving device (2), the driving device (2) being equipped with a motor (3); A drill rod (4) is mounted on the output shaft of the motor (3); a drill bit (5) is fixedly connected to one end of the drill rod (4) away from the motor (3); and the drill rod (4) and the drill bit (5) are jointly provided with a liquid spraying device; A plurality of liquid replenishing heads (6) are circumferentially distributed and fixedly connected to the outside of the drill rod (4); the liquid replenishing heads (6) are used to replenish the hole wall with an additional anti-collapse liquid; the liquid replenishing heads (6) and the liquid spraying device are both connected to an external liquid supply system; a boosting component is provided on the liquid replenishing head (6); the boosting component is used to increase the pressure of the liquid in the liquid replenishing head (6) penetrating into the hole wall; The detection mechanism is arranged outside the drill rod (4) and is used to detect the pressure of the liquid sprayed out of the drill hole, thereby controlling whether the liquid replenishing head (6) is connected to the external liquid supply system.

2. A stable blast hole drilling device for coal mines according to claim 1, characterized in that: The booster assembly comprises: A liquid sealing shell (7) is slidably connected to the liquid replenishing head (6), and the liquid sealing shell (7) is used to assist the anti-collapse liquid to penetrate toward the hole wall; A plurality of first fixed wheel groups (71) are installed on a side of the liquid sealing shell (7) away from the drill rod (4); The wave component is arranged in the corresponding liquid sealing shell (7) and is used to make the liquid in the liquid sealing shell (7) penetrate into the hole wall in a wave-like manner.

3. A stable blast hole drilling device for coal mines according to claim 2, characterized in that: A plurality of first spring telescopic rods (8) are fixedly connected to a side of the liquid sealing shell (7) away from the drill rod (4); a sliding wheel group (81) is installed at the telescopic end of the first spring telescopic rod (8); and a connecting piece (82) is fixedly connected between the sliding wheel group (81) and the adjacent first fixed wheel group (71).

4. A stable blast hole drilling device for coal mines according to claim 3, characterized in that: The liquid sealing shell (7) is fixedly connected with symmetrically distributed squeezing rods (73), and the squeezing rods (73) are used to compact the soft hole wall.

5. A stable blast hole drilling device for coal mines according to claim 4, characterized in that: The wave component includes: An airbag (9) is fixedly connected to the corresponding liquid sealing shell (7), and the airbag (9) is provided with a protruding portion; A fixed folding plate (72) is fixedly connected to a position corresponding to the liquid sealing shell (7) near the raised portion of the airbag (9) and is used to separate the raised portion of the airbag (9) from other positions; the fixed folding plate (72) is slidably connected to a pressing plate (10), and the pressing plate (10) is used to press the raised portion of the airbag (9); A driving component is arranged in the corresponding liquid sealing shell (7) and is used to periodically drive the squeezing plate (10) to squeeze the raised portion of the airbag (9).

6. A stable blast hole drilling device for coal mines according to claim 5, characterized in that: The driving component comprises: A rotating disk (101) mounted on the first fixed wheel set (71); A connecting rod (102) is rotatably connected to the rotating disk (101), and the connecting rod (102) is slidably connected to the extrusion plate (10).

7. The stable blast hole drilling equipment for coal mines according to claim 5, characterized in that: The detection mechanism includes: A plurality of first hydraulic telescopic rods (12) distributed in a circumferential direction, all of which are fixedly connected to the drill rod (4); a telescopic end of the first hydraulic telescopic rod (12) is fixedly connected to the corresponding liquid sealing shell (7); A plurality of second hydraulic telescopic rods (13) are respectively fixed to the outside of the drill rod (4), and the second hydraulic telescopic rods (13) are connected to the corresponding first hydraulic telescopic rods (12); A sliding ring (14) is slidably connected to the outer side of the drill rod (4); the telescopic end of the second hydraulic telescopic rod (13) is fixedly connected to the sliding ring (14); a spring is installed between the fixed part of the second hydraulic telescopic rod (13) and the sliding ring (14); and the sliding ring (14) is fixedly connected to a liquid blocking cover (15); There are a plurality of trigger assemblies, all of which are arranged on a side of the drill rod (4) close to the corresponding fluid infusion head (6), and are used to control whether the fluid infusion head (6) is connected to an external fluid supply system.

8. The stable blast hole drilling equipment for coal mines according to claim 7, characterized in that: The liquid-blocking cover (15) is made of a flexible material, the sliding ring (14) is fixedly connected to a circumferentially distributed second spring telescopic rod (16), the telescopic end of the second spring telescopic rod (16) is fixedly connected to a weight block, the weight block at the telescopic end of the second spring telescopic rod (16) is fixedly connected to the liquid-blocking cover (15), and a second fixed wheel set (17) is mounted on the weight block of the second spring telescopic rod (16).

9. A stable blast hole drilling device for coal mines according to claim 8, characterized in that: A through hole is provided on a side of the liquid-blocking cover (15) close to the drill rod (4), thereby reducing the probability of drill cuttings being intercepted in the liquid-blocking cover (15).

10. The stable blast hole drilling equipment for coal mines according to claim 9, characterized in that: The trigger component includes: a liquid-blocking valve (18) fixedly connected to a side of the drill rod (4) close to the corresponding liquid-supplementing head (6); a liquid-supplying pipe (11) fixedly connected to the drill rod (4); the liquid-supplying pipe (11) being connected to an external liquid-supplying system; the liquid-supplying pipe (11) being connected to the liquid-supplementing head (6) via the liquid-blocking valve (18); and a rotating plate (19) fixedly connected to the valve core of the liquid-blocking valve (18); A fixed block (20) is fixedly connected to the outer side of the drill rod (4); the fixed block (20) is slidably connected to a sliding member (21), and a tension spring is fixedly connected therebetween; the sliding member (21) contacts the sliding ring (14); the rotating plate (19) is slidably connected to a sliding block (22), the sliding block (22) is rotatably connected to a rotating block (23), and the sliding member (21) is fixedly connected to the rotating block (23).

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