Drilling dredging device

Abstract

The embodiment of the utility model discloses a drill hole dredging device, and relates to the field of coal mine gas control, which can solve the problem of drill hole blockage and ensure the extraction concentration, the drill hole dredging device comprises a drill bit, the top of the drill bit is a cone with a cutting edge on the surface, and the bottom of the drill bit is provided with a connecting hole; the first end of the pneumatic motor is provided with speed reduction equipment and connected with the connecting hole of the drill bit through a transmission shaft penetrating through the speed reduction equipment, an exhaust port is formed in the outer surface of the pneumatic motor, and an air inlet through hole is formed in the second end of the pneumatic motor; the three-way valve comprises a main pipeline and a branch pipeline, the main pipeline comprises a first straight port and a second straight port, one end of the branch pipeline is connected to the main pipeline in a penetrating mode, and the other end of the branch pipeline is a discharging port; and one end of the connecting pipe is detachably connected to the air inlet through hole in the second end of the pneumatic motor, and the connecting pipe is used for being connected with a compressed air pipeline. The embodiment of the utility model is suitable for mining area gas control scenes.

Description

Technical Field

[0001] The utility model relates to the field of coal mine gas control, in particular to a drilling and dredging device. Background Art

[0002] Gas is an important factor affecting the safe production of coal mines. Extracting and utilizing gas is the main means and goal to promote safe production in coal mines. Due to the extremely complex occurrence conditions of coal seams in my country and the low permeability of coal seams, there are generally problems such as great difficulty in extracting gas from coal mines and poor extraction effects. Therefore, negative pressure extraction is generally adopted at production sites. During the negative pressure extraction process, in addition to gas entering the extraction pipe through the holes on the screen pipe, fine coal particles and water particles in the coal seam also enter the extraction pipe and adhere to the pipe wall of the extraction pipe. After a period of extraction, the adhered coal slime will fill the screen pipe section of the extraction pipe, blocking the gas flow channel and affecting the extraction effect.

[0003] In order to remove the coal slime blocking the upward drilling extraction pipe, various methods were used on site, including high-pressure water flushing, compressed gas hole cleaning, and poking holes with slender rods. Although these methods played a certain role, the results were not ideal. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a drilling dredging device that can solve the drilling blockage problem and ensure the extraction concentration.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The utility model embodiment provides a drilling and unblocking device, the drilling and unblocking device comprising: a drill bit, the top of the drill bit is a cone with a cutting edge on the surface, and the bottom of the drill bit is provided with a connecting hole; an air motor, the first end of the air motor is equipped with a reduction device, the surface of the reduction device is penetrated by a transmission shaft, and is connected to the connecting hole of the drill bit through the reduction device, an exhaust port is provided on the outer surface of the air motor, and an air intake hole is provided at the second end of the air motor; a three-way valve, comprising a main pipeline and a branch pipeline, the main pipeline comprising a first straight port and a second straight port, one end of the branch pipeline is connected to the main pipeline, and the other end of the branch pipeline is a discharge port; a connecting pipe, one end of the connecting pipe is detachably connected to the air intake hole at the second end of the air motor, the other end of the connecting pipe is inserted into the main pipeline of the three-way valve from the first straight port, and extends out from the second straight port for connecting a compressed air pipeline.

[0007] Optionally, a spiral groove is provided on a side surface of the drill bit, and a cutting edge is provided on a side edge of the spiral groove.

[0008] Optionally, at least two groups of circumferentially arranged positioning cylinders are arranged on the outer surface of the pneumatic motor at intervals along the axial direction.

[0009] Optionally, each group of positioning cylinders includes at least three positioning cylinders arranged at equal arc intervals along the circumferential direction.

[0010] Optionally, an installation positioning hole is provided on the outer surface of the pneumatic motor, and the bottom end of the positioning cylinder is fixedly connected to the installation positioning hole.

[0011] Optionally, the positioning cylinder includes a cylindrical body having a receiving cavity inside, a top of the cylindrical body being provided with an opening connected to the receiving cavity, a compression spring being arranged in the receiving cavity, a top end of the compression spring being arranged toward the opening, a rolling steel ball being provided at the top end of the compression spring, and a portion of the rolling steel ball being exposed outside the opening.

[0012] Optionally, the connection between the connecting pipe and the compressed air pipeline is fixed to the second straight port of the three-way valve by a locking nut.

[0013] The utility model provides a drilling and unblocking device, in which a drill bit is connected to an air motor equipped with a reduction device at a first end, an exhaust port is provided on an outer surface of the air motor, and an air intake hole is provided at a second end. When the air motor rotates, the drill bit is driven to rotate; the utility model also includes a three-way valve, the three-way valve includes a main pipeline and a branch pipeline, the main pipeline includes a first straight port and a second straight port, one end of the branch pipeline is connected to the main pipeline, and the other end of the branch pipeline is a discharge port. One end of a connecting pipe is detachably connected to the air intake hole at the second end of the air motor, and the connecting pipe is used to connect a compressed air pipeline. The other end of the connecting pipe is inserted into the main pipeline of the three-way valve from the first straight port and extends out from the second straight port. The operator slowly pushes the connecting pipe at the orifice to give the drill bit a certain thrust along the axis, and the drill bit rotates and moves forward along the axis line of the borehole, thereby clearing the blockage in the borehole, unblocking the channel for gas flow, and improving the extraction efficiency of the drilling gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a schematic diagram of the overall structure of a drilling and dredging device in one embodiment of the utility model;

[0016] Figure 2 It is a structural schematic diagram of a three-way valve of a drilling dredging device in one embodiment of the utility model;

[0017] Figure 3 It is a structural schematic diagram of a drill bit of a drilling and dredging device in one embodiment of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the pneumatic motor of the drilling and dredging device in one embodiment of the utility model;

[0019] Figure 5 It is a schematic structural diagram of a positioning cylinder of a drilling and dredging device in one embodiment of the utility model. DETAILED DESCRIPTION

[0020] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0021] It should be clear that the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The embodiment of the utility model provides a drilling dredging device, which reduces the difficulty of extracting drilling gas, more accurately controls the release time of blasting, and improves the safety during blasting.

[0023] The present invention is further described in detail below with reference to the accompanying drawings.

[0024] See also Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, a drilling and unblocking device provided in this embodiment includes: a drill bit 10, the top of the drill bit 10 is a cone with a cutting edge on the surface, and the bottom of the drill bit 10 is provided with a connecting hole (not shown in the figure); an air motor 11, a first end of the air motor 11 is equipped with a reduction device 111, a transmission shaft 1111 is passed through the surface of the reduction device 111, and is connected to the connecting hole 101 of the drill bit 10 through the reduction device 111, an exhaust port 112 is provided on the outer surface of the air motor 11, and an air intake hole (not shown in the figure) is provided at the second end of the air motor; a three-way valve 12, including A main pipeline 121 and a branch pipeline 122, the main pipeline 121 includes a first straight port 1211 and a second straight port 1212, one end of the branch pipeline 122 is connected to the main pipeline 121, and the other end of the branch pipeline 122 is a discharge port 1213; a connecting pipe 13, one end of the connecting pipe 13 is detachably connected to the air inlet hole 113 at the second end of the pneumatic motor 11, and the other end of the connecting pipe 13 is inserted into the main pipeline 121 of the three-way valve from the first straight port 1211, and extends from the second straight port 1212, for connecting a compressed air pipeline (not shown in the figure);

[0025] Among them, the exhaust port of the pneumatic motor discharges the used compressed air, driving the coal slime drilled into small pieces to move toward the hole mouth along the annular space between the connecting pipe and the inner wall of the external pipe until the coal slime is discharged out of the hole from the exhaust port. The length of the connecting pipe can be adjusted according to the actual hole depth on site, and the connecting pipe can be used as the air supply pipe of the pneumatic motor and as the support rod of the drill bit.

[0026] The utility model provides a drilling and unblocking device, in which a drill bit is connected to an air motor with a reduction device installed at a first end, an exhaust port is provided on the outer surface of the air motor, and an air intake hole is provided at the second end. When the air motor rotates, the drill bit is driven to rotate; it also includes a three-way valve, which includes a main pipeline and a branch pipeline. The main pipeline includes a first straight port and a second straight port, one end of the branch pipeline is connected to the main pipeline, and the other end of the branch pipeline is a discharge port. One end of a connecting pipe is detachably connected to the air intake hole at the second end of the air motor, and the connecting pipe is used to connect a compressed air pipeline. The other end of the connecting pipe is inserted into the main pipeline of the three-way valve from the first straight port and extends out from the second straight port. An operator slowly pushes the connecting pipe at the orifice to give a certain thrust to the drill bit along the axis, and the drill bit rotates and moves forward along the axis line of the borehole, thereby clearing the blockage in the borehole, unblocking the channel for gas flow, and improving the extraction efficiency of the drilling gas.

[0027] See also Figure 3 In some embodiments, a spiral groove 102 is provided on the side surface of the drill bit 10, and a cutting edge is provided on the side of the spiral groove 102; wherein the cutting edge on the side of the spiral groove on the drill bit can play a role in chip removal and hole expansion during movement.

[0028] See also Figure 1 , Figure 4 In some embodiments, at least two groups of circumferentially arranged positioning cylinders 21 are axially spaced apart on the outer surface of the pneumatic motor 11; in this way, sufficient support force can be provided to ensure the stability of the pneumatic motor during operation and prevent the drill bit from being deviated to one side due to external factors.

[0029] See also Figure 4 In some embodiments, each group of positioning cylinders 21 includes at least three positioning cylinders 21 arranged at equal arc intervals along the circumference; wherein, the equal arc arrangement along the circumference can effectively disperse the generated load, avoid excessive stress concentration in a single direction, and thus improve stability.

[0030] See also Figure 1 , Figure 4 In some embodiments, an installation positioning hole 22 is provided on the outer surface of the pneumatic motor 11, and the bottom end of the positioning cylinder 21 is fixedly connected to the installation positioning hole 22; wherein, the inner surface of the installation positioning hole and the surface of the positioning cylinder are provided with threads, so that the positioning cylinder and the installation positioning hole are connected to each other.

[0031] See also Figure 5 In some embodiments, the positioning cylinder 21 includes a cylindrical body 211, the interior of the cylindrical body has a receiving cavity 212, the top of the cylindrical body is provided with an opening connected to the receiving cavity 212, a compression spring 213 is arranged in the receiving cavity, the top of the compression spring 213 is arranged toward the opening, and a rolling steel ball 214 is provided at the top of the compression spring 213, and part of the rolling steel ball 214 is exposed outside the opening; wherein, the function of the spring is that when the rolling steel ball encounters an insurmountable obstacle, the rolling steel ball can be collected into the interior of the cylindrical body through the compression spring to prevent the positioning cylinder from being damaged; the function of the rolling steel ball partially exposed outside the opening is to convert the original sliding friction between the steel ball and the hole wall into rolling friction, while reducing the contact area with the hole wall and reducing the friction resistance generated during movement.

[0032] See also Figure 1 , Figure 2 In some embodiments, the connection 1214 between the connecting pipe 13 and the compressed air pipeline is fixed to the second straight port 1212 of the three-way valve by a locking nut 14; wherein the material of the connecting rod includes steel, and the locking nut fixes and seals the compressed air pipeline at the second straight port to ensure that the compressed air pipe will not fall off during the cutting process of the drill bit, thereby providing stable compressed air for the pneumatic motor.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] The above content has described the embodiments of the utility model in detail. Those skilled in the art can design and modify the device and its use within the scope of the utility model according to the on-site construction conditions.

[0035] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0036] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A drilling and dredging device, characterized in that: include: A drill bit, wherein the top of the drill bit is a cone with a cutting edge on the surface, and the bottom of the drill bit is provided with a connecting hole; A pneumatic motor, wherein a reduction device is installed at a first end of the pneumatic motor and is connected to the connecting hole of the drill bit via a transmission shaft passing through the reduction device, an exhaust port is provided on an outer surface of the pneumatic motor, and an air intake hole is provided at a second end of the pneumatic motor; A three-way valve, comprising a main pipeline and a branch pipeline, wherein the main pipeline comprises a first straight port and a second straight port, one end of the branch pipeline is connected to the main pipeline, and the other end of the branch pipeline is a discharge port; A connecting pipe, one end of which is detachably connected to the air inlet hole at the second end of the pneumatic motor, and the other end of which is inserted into the main pipeline of the three-way valve from the first straight port and extends from the second straight port for connecting to a compressed air pipeline.

2. The drilling and clearing device according to claim 1, characterized in that: A spiral groove is provided on the side surface of the drill bit, and a cutting edge is provided on the side edge of the spiral groove.

3. The drilling and clearing device according to claim 1, characterized in that: At least two groups of circumferentially arranged positioning cylinders are arranged at intervals along the axial direction on the outer surface of the pneumatic motor.

4. The drilling and clearing device according to claim 3, characterized in that: Each group of positioning cylinders includes at least three positioning cylinders which are arranged at equal arc intervals along the circumferential direction.

5. The drilling and clearing device according to claim 3 or 4, characterized in that: An installation positioning hole is provided on the outer surface of the pneumatic motor, and the bottom end of the positioning cylinder is fixedly connected to the installation positioning hole.

6. The drilling and clearing device according to claim 5, characterized in that: The positioning cylinder includes a cylindrical body, the interior of the cylindrical body has a receiving cavity, the top of the cylindrical body is provided with an opening connected to the receiving cavity, a compression spring is arranged in the receiving cavity, the top of the compression spring is arranged toward the opening, a rolling steel ball is provided at the top of the compression spring, and part of the rolling steel ball is exposed outside the opening.

7. The drilling and clearing device according to claim 1, characterized in that: The connection between the connecting pipe and the compressed air pipeline is fixed to the second straight port of the three-way valve by a locking nut.

Images