Gas extraction drilling machine capable of preventing gas from spraying holes

Abstract

The invention provides a gas extraction drilling machine capable of preventing gas from spraying holes. The gas extraction drilling machine comprises a supporting frame, a driving motor, an electric push column, a drill bit and a protection mechanism. The protection mechanism comprises supporting seats, a stepping motor, a reinforcing plate, a protection cover, a fixing rod and an air bag, the supporting seats are fixed to the two sides of the inner wall of the bottom end of the supporting frame, the stepping motor is installed on one side of the outer wall of each supporting seat, and the output end of each stepping motor is connected with one side of the reinforcing plate through a transmission column; the other side of the reinforcing plate is connected with a protective cover through a fixing rod, the protective cover is arranged outside the drill bit, and the top end of the protective cover is connected with the bottom end of the electric push column through an air bag. Through the protection mechanism, sprayed pulverized coal and gas are isolated by the protection cover, so that the risk of harming the personal safety of constructors is greatly reduced; and a screening box and a filter screen plate are used for screening the sprayed mixture, so that the protection effect is achieved, and the effect of relieving the follow-up working pressure is also achieved.

Description

Technical Field

[0001] The invention relates to the technical field of gas extraction drilling rigs, in particular to a gas extraction drilling rig capable of preventing gas blowout holes. Background Art

[0002] Gas extraction refers to the process of drilling into coal seams and gas-accumulated areas in coal mines, connecting the boreholes to special pipelines, and using extraction equipment to extract gas from coal seams and goafs to the surface. Gas extraction drills are equipment specifically used to drill gas extraction holes underground in coal mines, and they play an important role in coal mine safety production; these drills can drill holes in or near coal seams to facilitate the extraction of accumulated gas.

[0003] In order to extract gas, when a drilling rig is needed for assistance, the support frame is first moved to the specified position, and then the drive motor is started to drive the drill bit to rotate through the electric push column, and then the electric push column is started to extend to move the drill bit downward until the drill bit contacts the ground to drill a hole, and then the drill head is moved up and disconnected from the ground, and then the drilling rig is moved away to extend the mining pipe into the borehole to extract the gas; but during the use of the gas extraction drilling rig, as the depth of the borehole extends, due to the high gas pressure in the coal seam, when the borehole penetrates the gas-rich area, a large amount of coal powder and gas will be ejected from the borehole, that is, the borehole will spray holes, which will cause the gas around the drilling rig to exceed the standard, endangering the personal safety of construction workers, thereby affecting the use of the gas extraction drilling rig.

[0004] Therefore, it is of great significance to design a gas extraction drilling rig that prevents gas blowholes. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention proposes a gas extraction drill rig that prevents gas spray holes, which overcomes the defect that gas and coal powder are directly sprayed out from the borehole during the drilling process using the existing drilling rig, causing harm to the personal safety of construction workers. The protective mechanism on the extraction drill rig allows the sprayed coal powder and gas to be isolated by the protective cover, greatly reducing the risk of endangering the personal safety of construction workers; the sprayed mixture is screened by the screening box and the filter mesh plate, thereby playing a protective role and achieving the effect of reducing subsequent work pressure.

[0006] In view of this, a gas extraction drilling rig for preventing gas blowout holes of the present invention comprises a support frame, a driving motor, an electric push column, a drill bit and a protective mechanism;

[0007] A driving motor is installed at the middle of the top of the support frame, the output end of the driving motor is connected to an electric push column, the output end of the electric push column is connected to a drill bit, and the outer wall of the drill bit is provided with a protective mechanism;

[0008] The protection mechanism includes a protection part, which includes a support seat, a stepper motor, a reinforcement plate, a protective cover, a fixing rod and an air bag. The support seat is fixed on both sides of the inner wall of the bottom end of the support frame, and a stepper motor is installed on one side of the outer wall of the support seat. The output end of the stepper motor is connected to one side of the reinforcement plate through a transmission column, and the other side of the reinforcement plate is connected to the protective cover through a fixing rod. The protective cover is arranged outside the drill bit, and the top end of the protective cover is connected to the bottom end of the electric push column through an air bag.

[0009] The airbag comprises a wear-resistant airbag and a wear-resistant layer, the outer wall of the wear-resistant airbag is connected to the inner wall of the protective cover, the inner wall of the wear-resistant airbag is provided with a wear-resistant layer, and the inner wall of the wear-resistant layer contacts the outer wall of the electric push column.

[0010] The fixing rods are distributed on the reinforcement plate at equal angles.

[0011] The protection mechanism also includes a screening part, which includes a gas suction pump, a screening box, a collecting box, a filter screen and a derivation pipe. The gas suction pump is connected to the protective cover, and the gas suction pump is connected to the screening box. The bottom of the inner wall of the screening box is slidably connected to the collecting box, the middle of the inner wall of the screening box is slidably connected to the filter screen, and the top side of the screening box is connected to the derivation pipe.

[0012] The bottom end of the gas suction pump is fixed to the inner wall of the support frame through a support plate; the bottom end of the screening box is fixed to the outer wall of the support frame through a support platform.

[0013] The outer wall of the protective cover is connected to one end of an air suction hose, and the other end of the air suction hose is connected to a gas suction pump; one end of an output pipe is connected to the middle of the outer wall of the gas suction pump, and the other end of the output pipe is connected to a screening box.

[0014] It also includes an auxiliary mechanism, which is arranged in the screening box. The auxiliary mechanism includes a limit seat, a first spring, a guide rod, a second spring and a guide seat. The outer inner side of the filter screen plate is slidably connected with the limit seat.

[0015] The outer wall of the limit seat is sleeved with a first spring, the guide rod is slidably connected to slide in the middle of the top end of the screening box, the bottom end of the guide rod is connected to a guide seat, the middle part of the outer wall of the guide rod is sleeved with a second spring, the top end of the second spring is connected to the inner wall of the screening box, the bottom end of the second spring is connected to the guide seat, and the guide seat and the guide rod are fixedly connected.

[0016] An elastic telescopic mechanism is formed between the filter screen plate, the limiting seat and the first spring, and an elastic telescopic mechanism is formed between the guide rod, the second spring and the guide seat.

[0017] The beneficial effects of the present invention are:

[0018] 1. In the present invention, the sprayed coal powder and gas are blocked by the protective cover through the protective mechanism, which prevents the gas and coal powder from being directly sprayed out and causing the gas around the drilling rig to exceed the standard, greatly reducing the risk of endangering the personal safety of construction workers.

[0019] 2. In the present invention, the sprayed mixture is screened by the screening box and the filter screen plate, thereby reducing the subsequent work pressure.

[0020] 3. In the present invention, the filter screen is moved up and repeatedly collides with the limit seat through the auxiliary mechanism, thereby shaking off the coal powder that causes the filter screen to be blocked, preventing the filter screen from being blocked and affecting the screening effect, thereby facilitating the prevention of blockage of the filter screen when the gas extraction drilling rig is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the drill bit of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the protection mechanism of the present invention;

[0024] Figure 4 It is a schematic diagram of the three-dimensional cutaway structure of the protective cover of the present invention;

[0025] Figure 5 It is a schematic diagram of the three-dimensional cutaway structure of the screening box of the present invention;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the auxiliary mechanism of the present invention.

[0027] In the figure: 1. support frame; 2. drive motor; 3. electric push column; 4. drill bit; 511. support seat; 512. stepping motor; 513. reinforcement plate; 514. protective cover; 515. fixing rod; 516. air bag; 5161. wear-resistant air bag; 5162. wear-resistant layer; 521. gas suction pump; 522. screening box; 523. collecting box; 524. filter screen; 525. outlet pipe; 526. suction hose; 527. output pipe; 611. limit seat; 612. first spring; 613. guide rod; 614. second spring; 615. guide seat. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] Embodiment 1

[0030] See also Figure 1-5As shown, the present invention provides a gas extraction drilling rig for preventing gas blowout holes, comprising a support frame 1, a drive motor 2, an electric push column 3, a drill bit 4 and a protective mechanism; wherein,

[0031] See also Figure 1 and Figure 2 As shown, the support frame 1 is a door-shaped support with thickness, made of but not limited to steel. It is located on the ground around the drill hole. Preferably, the lower end surface of the support frame 1 is provided with a support leg with adjustable height, which is used to level the support frame 1 to facilitate the drill bit 4 to work better. A driving motor 2 is installed in the middle of the top of the support frame 1, and the output end of the driving motor 2 is connected to an electric push column 3, and the output end of the electric push column 3 is connected to the drill bit 4. The outer wall of the drill bit 4 is provided with a protective mechanism;

[0032] See also Figure 1 , Figure 3 and Figure 4 As shown, the protection mechanism includes a protection part and a screening part, wherein:

[0033] The protection part includes a support seat 511, a stepper motor 512, a reinforcement plate 513, a protective cover 514, a fixing rod 515 and an airbag 516. The support seat 511 is fixed on both sides of the inner wall of the bottom end of the support frame 1. Specifically, the support seat 511 is welded on both sides of the inner wall of the bottom end of the support frame 1. There are four support seats 511, two of which are arranged on one side of the inner wall of the bottom end of the support frame 1, and the other two support seats 511 are arranged on the other side of the inner wall of the bottom end of the support frame 1. A stepper motor 512 is installed on one side of the outer wall of the support seat 511, and the output end of the stepper motor 512 is connected to the reinforcement plate 513 through a transmission column, and the transmission column is arranged between the two support seats 511 on the same side; the outer wall of the reinforcement plate 513 is connected to the protective cover 514; specifically, the reinforcement plate 513 is an I-shaped structure, one side of the I-shaped reinforcement plate 513 is connected to the transmission column, and the other side of the I-shaped reinforcement plate 513 contacts the protective cover 514, and the side of the reinforcement plate 513 in contact with the protective cover 514 is semicircular, and the side of the reinforcement plate 513 in contact with the protective cover 514 is connected to the fixing rod 515 through a thread, that is, the outer wall of the fixing rod 515 is provided with a thread, and the bottom end of the protective cover 514 is provided with a threaded hole corresponding to the fixing rod 515, and the fixing rods 515 are distributed at equal angles on the reinforcement plate 513; the fixing rod 515 is used to fix the reinforcement plate 513 and the protective cover 514. The protective cover 514 is a cover-shaped structure with a cavity and steps inside, and is arranged outside the drill bit 4. Specifically, the protective cover 514 is a cylindrical structure with a slope, the circular diameter of the top surface is smaller than the circular diameter of the bottom surface, and the bottom end of the protective cover 514 is provided with an outer edge, and the outer edge of the protective cover 514 is connected to the reinforcing plate 513 through a fixing rod 515. An airbag 516 is provided at the top of the inner wall of the protective cover 514, and the airbag 516 is in contact with the electric push column 3. Specifically, the airbag 516 includes a wear-resistant airbag 5161 and a wear-resistant layer 5162, the outer wall of the wear-resistant airbag 5161 is connected to the inner wall of the protective cover 514, the inner wall of the wear-resistant airbag 5161 is provided with a wear-resistant layer 5162, and the inner wall of the wear-resistant layer 5162 is in contact with the outer wall of the electric push column 3; the wear-resistant airbag 5161 is made of, but not limited to, high-strength synthetic fiber, and the wear-resistant layer 5162 is made of, but not limited to, rubber and wear-resistant steel plate.

[0034] The screening part includes a gas suction pump 521, a screening box 522, a collection box 523, a filter screen 524 and an outlet pipe 525. The gas suction pump 521 is connected to the protective cover 514. Specifically, the outer wall of the protective cover 514 is connected to one end of the suction hose 526, and the other end of the suction hose 526 is connected to the gas suction pump 521. The bottom end of the gas suction pump 521 is fixed to the inner wall of the support frame 1 through a support plate. The middle of the outer wall of the gas suction pump 521 is connected to one end of the output pipe 527, and the other end of the output pipe 527 is connected to the screening box 522. The bottom end of the inner wall of the screening box 522 is slidably connected to the collection box 523, and the bottom end of the screening box 522 is fixed to the outer wall of the support frame 1 through a support platform. A filter screen plate 524 is slidably connected to the middle of the inner wall of the screening box 522, and a degassing pipe 525 is connected to one side of the top of the screening box 522. Preferably, the degassing pipe 525 is connected to the gas storage tank to guide the gas to the gas storage tank for storage.

[0035] The working process of a gas extraction drilling rig for preventing gas blowout holes in this embodiment is as follows:

[0036] In the process of gas extraction assisted by a drilling rig, the support frame 1 is first moved to the specified position, and then the drive motor 2 is started to drive the drill bit 4 to rotate through the electric push column 3, and then the electric push column 3 is started to extend to move the drill bit 4 downward until the drill bit 4 contacts the ground to drill a hole, and then the drill bit 4 is moved up and disconnected from the ground, and then the drilling rig is moved away, and the extraction pipe is extended into the borehole to extract the gas. This is a prior art and will not be elaborated on here.

[0037] In order to prevent the occurrence of gas spray holes, the protective cover 514 is first put on the outside of the drill bit 4. At this time, the bottom end of the protective cover 514 is in contact with the ground, and then the stepper motor 512 on the support seat 511 is started. Since the output end of the stepper motor 512 is connected to the reinforcement plate 513, the stepper motor 512 is started to drive the reinforcement plate 513 to rotate until the reinforcement plate 513 contacts the bottom end of the protective cover 514, thereby limiting the position of the protective cover 514. Subsequently, the fixing rod 515 can be rotated according to needs, so that the fixing rod 515 passes through the protective cover 514 and docks with the ground, and then the protective cover is fixed. 514 is reinforced to prevent the protective cover 514 from moving up at will, and then the wear-resistant airbag 5161 is inflated to expand the wear-resistant airbag 5161. Since the outer wall of the wear-resistant airbag 5161 is connected with the wear-resistant layer 5162, until the wear-resistant layer 5162 is fitted with the fixed end of the electric push column 3, the place is sealed. Then, when the borehole penetrates the gas-rich area and a large amount of coal powder and gas are sprayed out of the borehole, the protective cover 514 is first used to block it, thereby preventing the gas and coal powder from being directly sprayed out, causing the gas around the drilling rig to exceed the standard, and then endangering the personal safety of the construction workers;

[0038] Since both ends of the air suction hose 526 are connected to the protective cover 514 and the gas suction pump 521 respectively, the gas suction pump 521 is started to generate suction, so that the mixture of gas and coal powder is guided to the screening box 522 through the output pipe 527. At this time, the gas passes through the filter screen 524 to reach the position of the outlet pipe 525, and the coal powder is blocked by the filter screen 524. The coal powder falls into the collection box 523 under the action of gravity for centralized collection. The coal powder collected by the cleaner of the collection box 523 is subsequently taken out. After that, the gas is guided to the gas storage tank for storage through the outlet pipe 525, and then the ejected mixture is screened to reduce the subsequent working pressure, so as to facilitate the prevention of gas spray holes and the screening of ejected materials when the gas extraction drilling rig is used. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0039] Embodiment 2

[0040] See also Figure 1-Figure 3 , Figure 5 and Figure 6 As shown, the difference between this embodiment and the first embodiment is that an auxiliary mechanism is provided inside the screening box 522, the auxiliary mechanism includes a limit seat 611, a first spring 612, a guide rod 613, a second spring 614 and a guide seat 615, and the outer inner part of the filter screen plate 524 is slidably connected to the limit seat 611; the outer wall of the limit seat 611 is sleeved with the first spring 612, and the middle part of the top of the screening box 522 is slidably connected with the guide rod 613; the bottom end of the guide rod 613 is connected to the guide seat 615, and the middle part of the outer wall of the guide rod 613 is sleeved with the second spring 614; the filter screen plate 524, the limit seat 611 and the first spring 612 constitute an elastic telescopic mechanism, and the guide rod 613, the second spring 614 and the guide seat 615 constitute an elastic telescopic mechanism; the top of the second spring 614 is connected to the inner wall of the screening box 522, the bottom of the second spring 614 is connected to the guide seat 615, and the guide seat 615 and the guide rod 613 are fixedly connected.

[0041] The working process of the auxiliary mechanism of this embodiment is as follows:

[0042] During the process of drilling rig-assisted gas extraction, as the use time increases, when the filter screen plate 524 is blocked by coal powder, the guide rod 613 is pressed first to drive the guide seat 615 to move downward. Since the guide seat 615 is connected to the second spring 614, the guide seat 615 moves downward to deform the second spring 614, and then the second spring 614 resets the auxiliary guide rod 613 until the guide seat 615 contacts the filter screen plate 524, thereby generating a downward thrust on the filter screen plate 524, so that the filter screen plate 524 moves downward along the limit seat 611, and the filter screen plate 524 moves downward to squeeze The first spring 612 causes it to deform; when the guide seat 615 is disconnected from the filter screen plate 524, the first spring 612 resets to generate an upward elastic force, which causes the filter screen plate 524 to move up and collide repeatedly with the limit seat 611, thereby shaking off the coal powder that causes the filter screen plate 524 to be blocked, thereby preventing the filter screen plate 524 from being blocked and affecting the screening effect, and there is no need to take out the filter screen plate 524 for cleaning, which solves the problem of filter screen plate 524 being blocked, saving time and energy, thereby facilitating the prevention of filter screen plate 524 from being blocked when the gas extraction drilling rig is in use.

[0043] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. 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 gas extraction drilling rig for preventing gas blowout holes, characterized in that: It includes a support frame, a driving motor, an electric push column, a drill bit and a protective mechanism; A driving motor is installed at the middle of the top of the support frame, the output end of the driving motor is connected to an electric push column, the output end of the electric push column is connected to a drill bit, and the outer wall of the drill bit is provided with a protective mechanism; The protection mechanism includes a protection part, which includes a support seat, a stepper motor, a reinforcement plate, a protective cover, a fixing rod and an air bag. The support seat is fixed on both sides of the inner wall of the bottom end of the support frame, and a stepper motor is installed on one side of the outer wall of the support seat. The output end of the stepper motor is connected to one side of the reinforcement plate through a transmission column, and the other side of the reinforcement plate is connected to the protective cover through a fixing rod. The protective cover is arranged outside the drill bit, and the top end of the protective cover is connected to the bottom end of the electric push column through an air bag.

2. The gas extraction drilling rig for preventing gas blowout holes according to claim 1, characterized in that: The airbag comprises a wear-resistant airbag and a wear-resistant layer, the outer wall of the wear-resistant airbag is connected to the inner wall of the protective cover, the inner wall of the wear-resistant airbag is provided with a wear-resistant layer, and the inner wall of the wear-resistant layer contacts the outer wall of the electric push column.

3. The gas extraction drilling rig for preventing gas blowout holes according to claim 1, characterized in that: The fixing rods are distributed on the reinforcement plate at equal angles.

4. The gas extraction drilling rig for preventing gas blowout holes according to claim 1, characterized in that: The protection mechanism also includes a screening part, which includes a gas suction pump, a screening box, a collecting box, a filter screen and a derivation pipe. The gas suction pump is connected to the protective cover, and the gas suction pump is connected to the screening box. The bottom of the inner wall of the screening box is slidably connected to the collecting box, the middle of the inner wall of the screening box is slidably connected to the filter screen, and the top side of the screening box is connected to the derivation pipe.

5. The gas extraction drilling rig for preventing gas blowout holes according to claim 4, characterized in that: The bottom end of the gas suction pump is fixed to the inner wall of the support frame through a support plate; the bottom end of the screening box is fixed to the outer wall of the support frame through a support platform.

6. The gas extraction drilling rig for preventing gas blowout holes according to claim 4, characterized in that: The outer wall of the protective cover is connected to one end of an air suction hose, and the other end of the air suction hose is connected to a gas suction pump; one end of an output pipe is connected to the middle of the outer wall of the gas suction pump, and the other end of the output pipe is connected to a screening box.

7. The gas extraction drilling rig for preventing gas blowout holes according to claim 4, characterized in that: It also includes an auxiliary mechanism, which is arranged in the screening box. The auxiliary mechanism includes a limit seat, a first spring, a guide rod, a second spring and a guide seat. The outer inner side of the filter screen plate is slidably connected with the limit seat.

8. The gas extraction drilling rig for preventing gas blowout holes according to claim 7, characterized in that: The outer wall of the limit seat is sleeved with a first spring, the guide rod is slidably connected to slide in the middle of the top end of the screening box, the bottom end of the guide rod is connected to the guide seat, the middle part of the outer wall of the guide rod is sleeved with a second spring, the top end of the second spring is connected to the inner wall of the screening box, the bottom end of the second spring is connected to the guide seat, and the guide seat and the guide rod are fixedly connected.

9. The gas extraction drilling rig for preventing gas blowout holes according to claim 8, characterized in that: An elastic telescopic mechanism is formed between the filter screen plate, the limiting seat and the first spring, and an elastic telescopic mechanism is formed between the guide rod, the second spring and the guide seat.

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