Supporting device for coal mine underground drilling gas extraction

Abstract

The utility model discloses a supporting device for coal mine underground drilling gas extraction, and belongs to the technical field of coal mine gas disaster prevention and control. The device comprises a telescopic supporting ring, the telescopic supporting ring is arranged outside a drill rod in a sleeving mode, and a telescopic rod is hinged to the outer side face of the telescopic supporting ring; a lock catch and a control device are installed on the telescopic supporting ring, an automatic locking device, a rotating assembly, a transmission assembly and the like are installed on the telescopic rod, and the lock catch, the rotating assembly, the transmission assembly and the like are all connected with the control device. The supporting device can be automatically adjusted according to the softness of a coal seam, and effective supporting of a drilled hole is guaranteed; through equipment such as a control device and a transmission assembly, automatic operation of the supporting device is achieved, and the construction time of the supporting device is greatly shortened; the supporting device is scientific and reasonable in structural design, easy to operate and beneficial to improving the working efficiency of gas extraction.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal mine gas disaster prevention and control, and specifically relates to a supporting device for gas drainage from boreholes in coal mines Background Technique

[0002] Coal seam gas is a major risk factor in coal mine operations. It not only pollutes the air but may also cause explosions. Gas drainage is an effective measure to prevent coal mine gas disasters. However, the drainage boreholes are prone to caving due to the influence of ground stress, which affects the efficiency of gas drainage. Therefore, a supporting device that can prevent borehole caving is needed

[0003] Chinese patent document with publication number CN116575971A discloses a device suitable for supporting gas drainage boreholes. Four supporting petals are arranged in a tubular shape, and each supporting petal is connected by a supporting valve membrane. One end of the supporting petal is provided with a laser hole platform. The supporting petal unfolding screw jack is located at the center of the four supporting petals arranged in a tubular shape; a plate through groove is opened at one end of the supporting petal body to install the laser hole platform mounting seat, and the laser hole platform is installed in the laser hole platform mounting seat by a buckle or a screw. More than three supporting petal clamping plate spring shafts are arranged on one long side of the supporting petal body, and each supporting petal clamping plate spring shaft is equipped with a supporting petal unfolding clamping plate

[0004] Although the above invention can timely place the supporting device into the borehole and reduce the occurrence of caving, it cannot flexibly adjust the supporting strength according to the softness of the coal seam, so it cannot provide sufficient support and there is still a possibility of caving. In addition, the installation process of most supporting devices for gas drainage boreholes is relatively cumbersome and the construction time is long, which will affect the overall progress of gas drainage

[0005] Therefore, it is necessary to propose a supporting device for gas drainage from boreholes in coal mines to solve the above technical problems existing in the prior art Content of the Utility Model

[0006] The purpose of the utility model is to provide a supporting device for gas drainage from boreholes in coal mines to solve the problems of poor supporting effect and long construction time of the existing borehole supporting device

[0007] To achieve the above purpose, the utility model provides the following technical solutions

[0008] A supporting device for gas drainage from boreholes in coal mines includes a telescopic support ring sleeved outside the drill pipe

[0009] When the telescopic support ring is in a contracted state, it is clamped on the drill pipe. When the telescopic support ring is in an extended state, it is disengaged from the drill pipe

[0010] The telescopic support ring is hinged with a telescopic rod, and the telescopic rod can rotate relative to the plane where the telescopic support ring is located; when the telescopic rod is in the first position, the telescopic rod is parallel to the drill pipe and in a contracted state; when the telescopic rod rotates to the second position perpendicular to the drill pipe, the telescopic rod extends outwards, and the end of the telescopic rod contacts the inner wall of the drill hole.

[0011] Preferably, a lock and a control device for controlling the opening of the lock are installed on the telescopic support ring;

[0012] The telescopic support ring includes an arc body, and the two ends of the arc body overlap staggeredly and can slide relative to each other;

[0013] The lock is installed at the overlapping part where the two ends of the arc body overlap staggeredly; when the lock is locked, the two ends of the arc body are fixed; when the lock is unlocked, the two ends of the arc body slide out of alignment, and the diameter of the telescopic support ring expands.

[0014] Preferably, the control device includes a housing, and a first power supply, an infrared receiver and a processor are arranged inside the housing;

[0015] The first power supply is electrically connected to the infrared receiver and the processor, and the infrared receiver is signal-connected to the processor;

[0016] The processor is signal-connected to the lock.

[0017] Preferably, the telescopic rod includes an inner rod and an outer rod, the inner rod is sleeved in the outer rod, and a transmission component for driving the inner rod to move relative to the outer rod is arranged between the inner rod and the outer rod.

[0018] Preferably, a rotating component for driving the telescopic rod to rotate is further arranged between the telescopic support ring and the telescopic rod, and the rotating component includes a motor, a worm gear and a worm;

[0019] Both ends of the worm penetrate through the outer rod of the telescopic rod and are rotatably connected to the telescopic support ring;

[0020] A worm gear is installed on the output shaft of the motor, and the worm gear meshes with the worm; the motor is arranged on the outer rod or the telescopic support ring.

[0021] Preferably, a displacement sensor is further arranged on the telescopic rod.

[0022] Preferably, a plurality of groove groups are arranged at intervals on the drill pipe, each groove group includes a first groove and a second groove, and the second groove is located at the end of the first groove;

[0023] When the telescopic rod is in the initial first position, the telescopic rod is located in the first groove;

[0024] When the telescopic support ring is in a contracted state, the telescopic support ring is clamped in the second groove.

[0025] Preferably, at least four telescopic rods are arranged on each telescopic support ring, and all the telescopic rods are arranged at intervals along the circumferential direction of the telescopic support ring.

[0026] Preferably, the processor is also connected to the transmission assembly, the motor, and the displacement sensor through cables respectively.

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] 1. Through the mutual cooperation of the telescopic support ring and the telescopic rods, the drilling support device of the utility model can be automatically adjusted according to the softness of the coal seam, ensuring effective support for the drilling and preventing the occurrence of borehole collapse accidents caused by insufficient support force.

[0029] 2. The utility model installs a buckle and a control device on the telescopic support ring, and assembles high-efficiency motors, worm gears, displacement sensors, automatic locking devices, power supplies and other equipment on the telescopic rods, realizing the automatic operation of the support device and greatly shortening the construction time of the support device.

[0030] 3. The utility model also uses fireproof and explosion-proof cables for circuit connection, ensuring the reliability of the support device.

[0031] 4. The support device for gas drainage of boreholes in coal mines provided by the utility model has a scientific and reasonable structural design, is easy to operate, and is beneficial to improving the working efficiency of gas drainage. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic structural view of the telescopic support ring in the contracted state in the utility model Figure 1 ;

[0033] Figure 2 is a schematic structural view of the telescopic support ring in the extended state in the utility model Figure 1 ;

[0034] Figure 3 is a schematic structural view of the telescopic support ring in the contracted state in the utility model Figure 2 ;

[0035] Figure 4 is a schematic structural view of the telescopic support ring in the extended state in the utility model Figure 2 ;

[0036] Figure 5 is Figure 4 a partial enlarged view of part A in

[0037] Figure 6 is Figure 4Partial enlarged view at position B in [the figure];

[0038] Figure 7 is Figure 4 Partial enlarged view at position C in [the figure];

[0039] Figure 8 is the structural schematic diagram of the telescopic rod inside the present utility model Figure 1 ;

[0040] Figure 9 is Figure 8 Partial enlarged view at position D in [the figure];

[0041] Figure 10 is the structural schematic diagram of the telescopic rod inside the present utility model Figure 2 .

[0042] In the figure: 1 - drill pipe; 2 - telescopic rod; 2-1 - outer rod; 2-2 - inner rod; 3 - lock; 4 - telescopic support ring; 5 - control device; 6 - transmission component; 7 - displacement sensor; 8 - second power source; 9 - motor; 10 - worm gear; 11 - worm; 12 - bracket. Specific embodiments

[0043] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0044] Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0045] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0046] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0047] In the present utility model, unless otherwise clearly specified and defined, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0048] In addition, the technical solutions between various embodiments of the present utility model can be combined with each other, but it must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0049] Embodiment 1

[0050] As Figures 1 to 10 shown, this Embodiment 1 describes a support device for gas drainage from boreholes in coal mines, which includes a drill pipe 1. A plurality of telescopic support rings 4 are arranged on the drill pipe 1. A lock 3 and a control device 5 are installed on the telescopic support ring 4. The lock 3 is used to control the expansion of the telescopic support ring 4.

[0051] Four telescopic rods 2 are hinged to the outer side surface of each telescopic support ring 4. A rotating assembly and a transmission assembly 13 are arranged inside the telescopic rod 2. The rotating assembly is used to drive the telescopic rod 2 to rotate relative to the telescopic support ring 4, and the transmission assembly 13 is used to drive the telescopic rod 2 to extend.

[0052] A displacement sensor 7 is also arranged on the telescopic rod 2; the lock 3, the rotating assembly, the transmission assembly 13 and the displacement sensor 7 are all connected to the control device 5 through flame-proof and explosion-proof cables.

[0053] A plurality of groove groups are arranged at intervals on the drill pipe 1. Each groove group includes a first groove and a second groove. The second groove is at the end of the first groove. A telescopic support ring 4 is arranged in each second groove.

[0054] The lock 3 in this device is an electric lock. The control device 5 can control the locking and unlocking of the electric lock to expand the telescopic support ring 4 from the contracted state to the extended state.

[0055] The telescopic support ring 4 in the device includes an arc-shaped body. The two ends of the arc-shaped body overlap staggeredly and can slide relative to each other. The electric latch is installed at the overlapping part of the two ends of the arc-shaped body. When the telescopic support ring 4 is in a contracted state, the telescopic support ring 4 is located in the second groove, and the two ends of the telescopic support ring 4 are locked by the latch 3. When the latch 3 is unlocked, the telescopic support ring 4 uses its own restoring force to continuously slide the two ends, and its diameter continuously elongates. When its diameter elongates to the required length, the control device 5 controls the latch 3 to lock again, fixing the two ends of the telescopic support ring 4 to keep the telescopic support ring 4 stable, as Figure 2 and Figure 4 shown, the telescopic support ring 4 is in an extended state. When the telescopic support ring 4 in the device is in a contracted state, the telescopic support ring 4 is located in the second groove of the drill pipe 1. When the telescopic support ring 4 is in an extended state, the telescopic support ring 4 is disengaged from the drill pipe 1.

[0056] Four telescopic rods 2 are connected to the outer side surface of each telescopic support ring 4 by rivets, and the telescopic rods 2 are arranged equidistantly along the outer side surface of the telescopic support ring 4. Each telescopic rod 2 can rotate relative to the telescopic support ring 4.

[0057] The telescopic rod 2 includes an inner rod 2-2 and an outer rod 2-1. The inner rod 2-2 is sleeved in the outer rod 2-1. A rotating assembly is installed in the outer rod 2-1, and a transmission assembly 6 is installed between the outer rod 2-1 and the inner rod 2-2. Among them, the transmission assembly 13 is an electric slide rail. The rotating assembly includes a bracket 12, a second power source 8, a motor 9, a worm gear 10 and a worm 11. The bracket 12 is fixed inside the outer rod 2-1. The motor 9 and the second power source 8 are installed on the bracket 12. The second power source 8 is electrically connected to the motor 9 and the electric slide rail. A worm gear 10 is installed on the output shaft of the motor 9. The two ends of the worm 11 are fixed to the outer rod 2-1, and the worm 11 passes through the outer rod 2-1 and is rotationally connected to the telescopic support ring 4. At the same time, the worm gear 10 meshes with the worm 11. When the motor 9 rotates, it can drive the worm gear 10 to rotate. At the same time, the worm gear 10 drives the worm 11 and the outer rod 2-1 to rotate, so that the telescopic rod 2 rotates relative to the telescopic support ring 4.

[0058] When the telescopic rod 2 is in the first position, the telescopic rod 2 is located in the first groove and parallel to the drill pipe 1, and the telescopic rod 2 is in a contracted state. When the telescopic rod 2 rotates to the second position, the telescopic rod 2 is in an extended state and perpendicular to the drill pipe 1, and the end of the telescopic rod 2 away from the telescopic support ring 4 contacts the inner wall of the drill hole.

[0059] In the device, the control device 5 includes a housing, inside which a first power supply, an infrared receiver and a processor are arranged. The first power supply is electrically connected to the infrared receiver and the processor, and the infrared receiver is signal-connected to the processor. The processor is also connected to the latch 3, the transmission assembly 6, the motor 9 and the displacement sensor 7 respectively through a fireproof and explosion-proof cable

[0060] The working process of a supporting device for gas drainage from boreholes in coal mines in this embodiment is briefly described as follows:

[0061] (1) When the drill pipe 1 is drilling, the telescopic rod 2 is in the first position. The telescopic rod 2 is retracted in the first groove and parallel to the drill pipe 1; the telescopic support ring 4 is in the second groove, and the latch 3 locks both ends of the telescopic support ring 4 to keep it in a retracted state.

[0062] (2) After the drilling work is completed and the infrared receiver receives the signal given by the staff, the control device 5 controls the latch 3 to unlock, and both ends of the telescopic support ring 4 slide continuously, and its diameter continuously elongates; at the same time, the control device 5 controls the motor 9 to make the telescopic rod 2 rotate 90 degrees relative to the telescopic support ring 4, and the control device 5 controls the electric slide rail to make the telescopic rod 2 elongate.

[0063] (3) When the telescopic rod 2 elongates to contact the inner wall of the borehole, the displacement sensor 7 transmits a signal to the control device 5; at this time, the control device 5 controls the transmission assembly 6 to keep the length of the telescopic rod 2 unchanged; at the same time, the control device 5 controls the latch 3 to lock again to fix both ends of the telescopic support ring 4 and make the telescopic support ring 4 in an extended state.

[0064] (4) After both the telescopic support ring 4 and the telescopic rod 2 are fixed, the drill pipe 1 is withdrawn.

[0065] Embodiment 2

[0066] This Embodiment 2 also describes a supporting device for gas drainage from boreholes in coal mines. Except for the following technical features being different from those in the above Embodiment 1, the rest of the technical features can refer to the above Embodiment 1.

[0067] In this embodiment, five telescopic rods 2 are hinged to the telescopic support ring 4, and the five telescopic rods 2 are arranged equidistantly along the outer side surface of the telescopic support ring 4.

[0068] The number of the telescopic rods 2 is not limited to the above five. According to the actual situation of the borehole, the number of the telescopic rods 2 can be reasonably adjusted.

[0069] The embodiments of the present utility model are only used to illustrate the technical solutions of the present utility model rather than to limit it. For those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A support device for gas drainage from boreholes in underground coal mines, characterized in that: It includes a telescopic support ring which is sleeved outside the drill pipe; When the telescopic support ring is in a contracted state, it is clamped on the drill pipe, and when the telescopic support ring is in an extended state, it is disengaged from the drill pipe; An expansion rod is hinged on the telescopic support ring, and the expansion rod can rotate relative to the plane where the telescopic support ring is located; when the expansion rod is at the first position, the expansion rod is parallel to the drill pipe and in a contracted state; when the expansion rod rotates to the second position perpendicular to the drill pipe, the expansion rod extends outwards, and the end of the expansion rod contacts the inner wall of the drill hole.

2. The supporting device for gas drainage by borehole in coal mine according to claim 1, characterized in that: A lock and a control device for controlling the opening of the lock are installed on the telescopic support ring; The telescopic support ring includes an arc-shaped body, and the two ends of the arc-shaped body overlap staggeredly and can slide relative to each other; The lock is installed at the overlapping part where the two ends of the arc-shaped body overlap staggeredly; when the lock is locked, the two ends of the arc-shaped body are fixed; when the lock is unlocked, the two ends of the arc-shaped body slide out of alignment, and the diameter of the telescopic support ring expands.

3. The support device for gas drainage from boreholes in coal mines according to claim 2, characterized in that: The control device includes a housing, and a first power source, an infrared receiver and a processor are arranged inside the housing; The first power source is electrically connected to the infrared receiver and the processor, and the infrared receiver is signal-connected to the processor; The processor is signal-connected to the lock.

4. A support device for gas drainage from boreholes in underground coal mines according to claim 3, characterized in that: The expansion rod includes an inner rod and an outer rod, the inner rod is sleeved in the outer rod, and a transmission component for driving the inner rod to move relative to the outer rod is arranged between the inner rod and the outer rod.

5. The supporting device for gas drainage by boreholes in coal mines according to claim 4, wherein: A rotating component for driving the expansion rod to rotate is also arranged between the telescopic support ring and the expansion rod, and the rotating component includes a motor, a worm gear and a worm; Both ends of the worm penetrate through the outer rod of the expansion rod and are rotatably connected to the telescopic support ring; A worm gear is installed on the output shaft of the motor, and the worm gear meshes with the worm; the motor is arranged on the outer rod or the telescopic support ring.

6. The supporting device for gas drainage by borehole in coal mine underground according to claim 5, characterized in that: A displacement sensor is also arranged on the expansion rod.

7. A support device for gas drainage from boreholes in coal mines according to claim 1, characterized in that: A plurality of groove groups are arranged at intervals on the drill pipe, and each groove group includes a first groove and a second groove, and the second groove is at the end of the first groove; When the expansion rod is at the initial first position, the expansion rod is located in the first groove; When the telescopic support ring is in a contracted state, the telescopic support ring is clamped in the second groove.

8. A support device for gas drainage from boreholes in coal mines according to claim 7, characterized in that: At least four expansion rods are arranged on each telescopic support ring, and all the expansion rods are arranged at intervals along the circumference of the telescopic support ring.

9. The support device for gas drainage by boreholes in coal mines according to claim 6, wherein: The processor is also respectively connected to the transmission component, the motor and the displacement sensor through cables.

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