Wide-wing screw-in drill rod device for coal mine

Abstract

A wide-wing screw-in drill rod device for a coal mine comprises a drill bit (1) used for cutting the bottom of a hole and a cone wing component used for continuously cutting the wall of the hole, forming of an early basic hole body is achieved through the drill bit (1), and forming of a later final hole body is achieved through the cone wing component. According to the spiral blade forming device, the hole wall of an early basic hole body is scraped, slag is continuously discharged, then a later final hole body is obtained, the technical problem that a spiral blade is integrally attached to the side face of the periphery of a drill rod is solved, and therefore the forming effect of the hole body is improved.

Description

Technical Field

[0001] The utility model relates to a wide-wing screw-in drill rod device, in particular to a wide-wing screw-in drill rod device used in coal mines. Background Art

[0002] Wide-wing rotary drilling rods are used for hole-forming operations during coal mining, thereby improving the efficiency of coal mining. Therefore, the wide-wing rotary drilling rod device for coal mines is an important drill rod device. In the existing wide-wing rotary drilling rod devices for coal mines, the spiral blades are still attached to the peripheral side of the drill rod as a whole, which is not conducive to the discharge of slag, thereby affecting the forming effect of the hole body. Summary of the Invention

[0003] The object of the utility model is a wide-wing screw-in drill rod device used in coal mines.

[0004] In order to overcome the above technical shortcomings, the purpose of the utility model is to provide a wide-wing screw-in drill rod device for coal mines, thereby improving the forming effect of the hole body.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: comprising a drill bit for cutting the bottom of the hole and a cone wing component for continuously cutting the hole wall.

[0006] Due to the design of the drill bit and the conical wing component, the early basic hole body is formed through the drill bit, and the later final hole body is formed through the conical wing component. The early basic hole body is scraped against the hole wall and the slag is continuously discharged to obtain the later final hole body, which solves the technical problem of attaching the spiral blade as a whole to the peripheral side of the drill pipe, thereby improving the hole body forming effect.

[0007] The utility model is designed to connect the drill bit and the cone wing component in a manner that the hole wall of the early basic hole body is scraped and slag is continuously discharged to obtain the later final hole body.

[0008] The utility model is designed to connect the cone wing component with the drill bit in a manner of forming the final hole body in the later stage.

[0009] The utility model is designed that the cone wing component comprises a barrel rod, spiral blades and a support rod.

[0010] The technical effects of the above four technical solutions are: highlighting the technical characteristics of scraping the hole wall of the early basic hole and continuously discharging the slag to obtain the later final hole body, and introducing the application in the technical field of wide-wing rotary drilling rod devices used in coal mines.

[0011] The present utility model is designed to further include a first attachment device, and the first attachment device is arranged between the drill bit and the conical wing component, and the first attachment device is set as a drill bit seat.

[0012] The present utility model is designed to further include a second attachment device, and the second attachment device is arranged on the conical wing component, and the second attachment device is set as a connecting seat.

[0013] The technical effects of the above two technical solutions are as follows: The integrated installation of other components is realized, and the technical effects of the present utility model are extended.

[0014] The present utility model is designed to respectively provide a drill bit seat, a connecting seat and a spiral blade on the cylinder rod, a support rod is arranged between the spiral blade and the cylinder rod, and a drill bit is arranged on the drill bit seat.

[0015] The technical effects of the above technical solution are as follows: The basic technical solution of the present utility model is composed of a drill bit, a drill bit seat, a connecting seat, a cylinder rod, a spiral blade and a support rod, and the technical problem of the present utility model is solved.

[0016] The present utility model is designed that the drill bit is set to include a head seat part and a wing tooth part, the outer end face of the extended part of the head seat part is set to be connected to the wing tooth part, the contracted part of the head seat part is set to be embedded-connected to the drill bit seat, and the peripheral side surface of the contracted part of the head seat part is set to be in contact connection with the bolt located on the drill bit seat. The head seat part is set as a convex-shaped block, and the wing tooth part is set as a strip-shaped body with a trapezoidal cross-section. The wing tooth part is set to be arranged and distributed along the radial line of the outer end face of the extended part of the head seat part.

[0017] The technical effects of the above technical solution are as follows: End-face body cutting of the hole bottom surface is realized.

[0018] The present utility model is designed that the cylinder rod is set as a tubular body with a threaded body at the front port part and a threaded body at the rear end head. The front port part of the cylinder rod is set to be threadedly connected to the drill bit seat, the rear end head of the cylinder rod is set to be threadedly connected to the connecting seat, the front part of the peripheral side surface of the cylinder rod is set to be connected to the spiral blade, and the rear part of the peripheral side surface of the cylinder rod is set to be connected to the support rod.

[0019] The technical effects of the above technical solution are as follows: Intermediate beam body support is realized.

[0020] The present utility model is designed that the spiral blade is set as a conical spiral blade, and the end of the contraction end of the spiral blade is set to be connected to the cylinder rod, and the end of the expansion end of the spiral blade is set to be connected to the support rod.

[0021] The technical effects of the above technical solution are as follows: Blade body cutting of the hole wall surface is realized.

[0022] The utility model is designed that the support rod is arranged as a rod-shaped body, the inner end of the support rod is arranged to be connected with the cylindrical rod, and the outer end of the support rod is arranged to be connected with the spiral blade.

[0023] The technical effect of the above technical solution is that the spiral blades and the barrel are connected separately.

[0024] The utility model is designed that an accommodating hole body is provided on the peripheral side surface of the extended portion of the seat of the drill bit seat and the contraction portion of the seat is arranged to be threadedly connected to the barrel rod, the extended portion of the seat is arranged to be accommodatingly connected to the drill bit and the accommodating hole body is arranged to be threadedly connected to the bolt located on the drill bit, the seat is arranged to be a convex cylindrical body with a stepped through hole and the accommodating hole body is arranged to be a threaded hole body.

[0025] The technical effect of the above technical solution is that the drill bit and the barrel can be installed in a detachable manner.

[0026] The utility model is designed that the connecting seat is configured as a tubular body with a threaded body at the inner port portion and a through-hole body at the peripheral side portion, and the threaded body of the connecting seat is configured to be threadedly connected to the barrel rod, and the through-hole body of the connecting seat is configured to be connected to the drilling rig through a pin shaft.

[0027] The technical effect of the above technical solution is that: a detachable installation between the barrel rod and the drilling rig is achieved.

[0028] The utility model is designed so that the drill bit, the barrel, the spiral blades and the support rod are distributed in the manner of spiral sheet reaming, and the drill bit, the barrel, the spiral blades and the support rod, the drill bit seat and the connecting seat are distributed in the manner of end support.

[0029] The utility model is designed in which the center line of the drill bit, the center line of the drill bit seat, the center line of the connecting seat and the center line of the barrel are arranged on the same straight line, a spiral blade and a support rod are arranged to form a group of rotary cutting components, at least three groups of rotary cutting components are arranged on the barrel, and the seat is arranged to be connected to the head seat.

[0030] The utility model is designed such that the ratio between the length of the support rod and the radius of the drill bit is set to 1:2.75-2.95, and the ratio between the diameter of the barrel rod and the diameter of the extension portion of the head seat is set to 1:1.08-1.1.

[0031] The technical effect of the above technical solution is that: the hole body is expanded and the slag is discharged through the spiral blade hole body.

[0032] In this technical solution, after the early basic hole body scrapes the hole wall and continuously discharges the slag, the scraping of the hole wall and the continuous discharge of the slag of the later final hole body are achieved by the cone wing component. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 It is a schematic diagram of the present invention.

[0035] Figure 2 is Figure 1 the left view of

[0036] Figure 3 It is a schematic diagram of the connection relationship between the drill bit 1 and the drill bit seat 2.

[0037] drill bit - 1, drill bit seat - 2, connection seat - 3, barrel rod - 4, spiral blade - 5, support rod - 6, head seat part - 11, wing tooth part - 12, seat part - 21, accommodation hole body - 22. Specific embodiments

[0038] According to the examination guidelines, terms such as "having", "comprising", and "including" used in the present invention should be understood as not excluding the presence or addition of one or more other elements or their combinations.

[0039] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; 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 elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0041] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other. Additionally, unless otherwise specified, the equipment and materials used in the following embodiments are commercially available. If the processing conditions are not clearly stated, please refer to the product manuals purchased or follow the conventional methods in the art.

[0042] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to 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 the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0043] Figure 1 This is the first embodiment of the present utility model. Specifically described with reference to the accompanying drawings, this embodiment includes a drill bit 1, a drill bit seat 2, a connecting seat 3, a barrel rod 4, a spiral blade 5, and a support rod 6. The drill bit seat 2, the connecting seat 3, and the spiral blade 5 are respectively arranged on the barrel rod 4. A support rod 6 is arranged between the spiral blade 5 and the barrel rod 4, and a drill bit 1 is arranged on the drill bit seat 2.

[0044] In this embodiment, the drill bit 1 is set to include a head seat portion 11 and a wing tooth portion 12. The outer end face of the extended portion of the head seat portion 11 is set to be connected to the wing tooth portion 12. The contracted portion of the head seat portion 11 is set to be embedded-connected to the drill bit seat 2, and the peripheral side surface of the contracted portion of the head seat portion 11 is set to be in contact-connected with the bolt located on the drill bit seat 2. The head seat portion 11 is set to be a convex-shaped block, and the wing tooth portion 12 is set to be a strip-shaped body with a trapezoidal cross-section. The wing tooth portion 12 is set to be arranged and distributed along the radial line of the outer end face of the extended portion of the head seat portion 11.

[0045] Through the drill bit 1, a support connection point for the drill bit seat 2 is formed. The connection with the drill bit seat 2 is achieved by the head seat portion 11, and the cutting process of the hole bottom is achieved by the wing tooth portion 12. Its technical purpose is to be used as a component for front cutting of the hole body.

[0046] In this embodiment, a receiving hole body 22 is arranged on the peripheral side surface of the extended portion of the seat portion 21 of the drill bit seat 2. The contracted portion of the seat portion 21 is set to be thread-connected to the barrel rod 4. The extended portion of the seat portion 21 is set to be receiving-connected to the drill bit 1, and the receiving hole body 22 is set to be thread-connected to the bolt located on the drill bit 1. The seat portion 21 is set to be a convex-shaped cylindrical body with a stepped through-hole, and the receiving hole body 22 is set to be a threaded hole body.

[0047] Through the drill bit base 2, a support connection point for the drill bit 1 and the barrel rod 4 is formed. The seat portion 21 realizes the connection with the drill bit 1 and the connection with the barrel rod 4. The accommodation hole body 22 realizes the connection process with the bolt located between the drill bit 1 and the drill bit base 2. Its technical purpose is: to be used as a component for connecting the drill bit 1 and the barrel rod 4.

[0048] In this embodiment, the connection seat 3 is set as a tubular body with a threaded body at the inner port part and a through-hole body at the peripheral side surface, and the threaded body of the connection seat 3 is set to be threadedly coupled with the barrel rod 4. The through-hole body of the connection seat 3 is set to be connected to the drilling rig through a pin shaft.

[0049] Through the connection seat 3, a support connection point for the barrel rod 4 is formed. The connection seat 3 realizes the connection with the barrel rod 4. Its technical purpose is: to be used as a component for connecting the barrel rod 4 and the drilling rig.

[0050] In this embodiment, the barrel rod 4 is set as a tubular body with a threaded body at the front port part and a threaded body at the rear end head. The front port part of the barrel rod 4 is set to be threadedly coupled with the drill bit base 2. The rear end head of the barrel rod 4 is set to be threadedly coupled with the connection seat 3, and the front part of the peripheral side surface of the barrel rod 4 is set to be coupled with the spiral blade 5. The rear part of the peripheral side surface of the barrel rod 4 is set to be coupled with the support rod 6.

[0051] Through the barrel rod 4, a support connection point for the drill bit base 2, the connection seat 3, the spiral blade 5 and the support rod 6 is formed. The barrel rod 4 realizes the connection with the drill bit base 2, the connection with the connection seat 3, the connection with the spiral blade 5, and the connection with the support rod 6. Its technical purpose is: to be used as a support carrier for the drill bit base 2, the connection seat 3, the spiral blade 5 and the support rod 6.

[0052] In this embodiment, the spiral blade 5 is set as a conical spiral blade, and the end at the contracted end of the spiral blade 5 is set to be coupled with the barrel rod 4. The end at the expanded end of the spiral blade 5 is set to be coupled with the support rod 6.

[0053] Through the spiral blade 5, a support connection point for the barrel rod 4 and the support rod 6 is formed. The spiral blade 5 realizes the connection with the barrel rod 4 and the connection with the support rod 6. Its technical purpose is: to be used as a component for cutting the peripheral side surface of the hole body.

[0054] In this embodiment, the support rod 6 is set as a rod-shaped body, the inner end of the support rod 6 is set to be coupled with the barrel rod 4, and the outer end of the support rod 6 is set to be coupled with the spiral blade 5.

[0055] Through the support rod 6, a support connection point for the cylinder rod 4 and the spiral blade 5 is formed. The support rod 6 realizes the connection with the cylinder rod 4 and the connection with the spiral blade 5. Its technical purpose is to be used as a component for connecting the spiral blade 5 and the cylinder rod 4.

[0056] In this embodiment, the ratio between the length of the support rod 6 and the radius of the drill bit 1 is set to 1:2.75 - 2.95, and the ratio between the diameter of the cylinder rod 4 and the diameter of the extended part of the head seat portion 11 is set to 1:1.08 - 1.1.

[0057] Its technical purpose is to achieve a one-time drilling forming of a hole body with an increased aperture.

[0058] In this embodiment, the drill bit 1, the cylinder rod 4, the spiral blade 5, and the support rod 6 are arranged in a spiral blade hole expansion manner, and the drill bit 1, the cylinder rod 4, the spiral blade 5, and the support rod 6 and the drill bit seat 2 and the connection seat 3 are arranged in an end support manner. The center lines of the drill bit 1, the drill bit seat 2, the connection seat 3, and the cylinder rod 4 are set on the same straight line. One spiral blade 5 and one support rod 6 are set to form a set of rotary cutting components, and at least three sets of rotary cutting components are arranged on the cylinder rod 4. The seat portion 21 is set to be coupled with the head seat portion 11.

[0059] One of the supporting examples of the first embodiment of the present utility model, the ratio between the length of the support rod 6 and the radius of the drill bit 1 is set to 1:2.75, and the ratio between the diameter of the cylinder rod 4 and the diameter of the extended part of the head seat portion 11 is set to 1:1.08.

[0060] Another supporting example of the first embodiment of the present utility model, the ratio between the length of the support rod 6 and the radius of the drill bit 1 is set to 1:2.95, and the ratio between the diameter of the cylinder rod 4 and the diameter of the extended part of the head seat portion 11 is set to 1:1.1.

[0061] Still another supporting example of the first embodiment of the present utility model, the ratio between the length of the support rod 6 and the radius of the drill bit 1 is set to 1:2.8, and the ratio between the diameter of the cylinder rod 4 and the diameter of the extended part of the head seat portion 11 is set to 1:1.09.

[0062] The method of using this embodiment is as follows: when it is necessary to perform a hole-forming operation during coal mining, place the connecting seat 3 on the end shaft of the drill rig, install the pin shaft between the through-hole body of the connecting seat 3 and the end shaft of the drill rig, thereby installing the connecting seat 3 on the end shaft of the drill rig, place the contraction part of the head seat part 11 into the hole body of the expansion part of the seat part 21, rotate the bolt in the accommodating hole body 22, so that the inner end of the bolt acts on the peripheral side surface of the contraction part of the head seat part 11, thereby installing the drill bit 1 on the drill bit seat 2, rotate the rear end head of the barrel rod 4 in the inner port part of the connecting seat 3, thereby installing the barrel rod 4 on the connecting seat 3, and rotate the contraction part of the seat part 21 in the front port part of the barrel rod 4, thereby installing the drill bit seat 2 on the barrel rod 4 When the end shaft of the drill rig drives the connecting seat 3 to rotate, the drill bit 1, the drill bit seat 2, the barrel rod 4, the spiral blade 5 and the support rod 6 rotate with the connecting seat 3, the wing tooth portion 12 cuts the bottom of the hole, and the spiral blade 5 cuts the peripheral side of the hole body, thereby performing a hole-forming operation in the coal mining process. When the hole-forming operation is completed, the drill bit 1, the drill bit seat 2, the connecting seat 3, the barrel rod 4, the spiral blade 5 and the support rod 6 are removed from the hole, and the rear end head of the barrel rod 4 rotates in the opposite direction in the inner port portion of the connecting seat 3 to separate the barrel rod 4 from the connecting seat 3, and the contraction portion of the seat portion 21 rotates in the opposite direction in the front port portion of the barrel rod 4 to separate the drill bit seat 2 from the barrel rod 4.

[0063] When verifying the present utility model, the inventor abandoned the existing technical feature of attaching the spiral blade as a whole to the peripheral side of the drill rod, and first proposed a technical feature of scraping the hole wall of the early basic hole body and continuously discharging the slag to obtain the later final hole body. The first technical effect was obtained: the distributed forming of the hole body was realized, the resistance torque to the drilling rig was reduced, and the forming efficiency of the hole body was improved. The second technical effect was obtained: the load on the spiral blade 5 was evenly distributed, and the forming accuracy of the hole body was improved. The third technical effect was obtained: the middle part of the spiral blade 5 was suspended by the support rod 6, which improved the discharge effect of the slag. The fourth technical effect was obtained: the drilling resistance was distributed, the connection strength requirements between the drill bit 1, the drill bit seat 2, the connecting seat 3, the barrel rod 4, the spiral blade 5 and the support rod 6 were reduced, and the service life was extended. The fifth technical effect was obtained: the detachable installation between components was realized, and the interchangeability between components was facilitated.

[0064] In the second embodiment of the present invention, the drill bit 1 and the cone wing member are connected in such a manner that the hole wall of the preliminary basic hole body is scraped and the slag is continuously discharged to obtain the subsequent final hole body.

[0065] In this embodiment, the conical wing member is connected to the drill bit 1 in a manner that the final hole body is formed in the later stage.

[0066] In this embodiment, the cone wing component includes a cylindrical rod 4, spiral blades 5 and a support rod 6.

[0067] In this embodiment, a first accessory device is further included and is arranged between the drill bit 1 and the cone wing component. The first accessory device is configured as a drill bit seat 2 .

[0068] In this embodiment, a second accessory device is further included and is arranged on the cone wing component. The second accessory device is arranged as a connecting seat 3 .

[0069] The second embodiment of the present invention is based on the first embodiment.

[0070] The utility model has the following features:

[0071] 1. Due to the design of the drill bit 1 and the conical wing component, the drill bit 1 is used to form the preliminary basic hole body, and the conical wing component is used to form the subsequent final hole body. The preliminary basic hole body is scraped off the hole wall and the slag is continuously discharged to obtain the subsequent final hole body, which solves the technical problem of attaching the spiral blade as a whole to the peripheral side surface of the drill pipe, thereby improving the hole body forming effect.

[0072] 2. Due to the design of the cylindrical rod 4, the spiral blade 5 and the supporting rod 6, the spiral blade 5 can be connected at the ends and the middle part can be suspended and distributed.

[0073] 3. Due to the design of the drill bit seat 2, the connection between the drill bit 1 and the cone wing component is realized.

[0074] 4. Due to the design of the connecting seat 3, the connection between the cone wing component and the drilling rig is realized.

[0075] Therefore, in the technical field of wide-wing rotary drilling rod devices for coal mines, all technical contents including the drill bit 1 for cutting the bottom of the hole and the conical wing components for continuously cutting the hole wall are within the protection scope of this utility model.

Claims

1. A wide-wing precession drill pipe device for coal mines, characterized in that: It includes a drill bit (1) for cutting the bottom of the hole and a conical wing component for continuously cutting the hole wall. The conical wing component includes a barrel rod (4), a spiral blade (5) and a support rod (6). It also includes a first accessory device which is arranged between the drill bit (1) and the conical wing component, and the first accessory device is set as a drill bit seat (2). It also includes a second accessory device which is arranged on the conical wing component, and the second accessory device is set as a connecting seat (3). The drill bit seat (2), the connecting seat (3) and the spiral blade (5) are respectively arranged on the barrel rod (4). A support rod (6) is arranged between the spiral blade (5) and the barrel rod (4), and a drill bit (1) is arranged on the drill bit seat (2).

2. The wide-wing precession drill pipe device for coal mines according to claim 1, wherein: The drill bit (1) is set to include a head seat part (11) and a wing tooth part (12). The outer end face of the extended part of the head seat part (11) is set to be connected to the wing tooth part (12). The contracted part of the head seat part (11) is set to be embedded-connected to the drill bit seat (2), and the peripheral side surface of the contracted part of the head seat part (11) is set to be in contact connection with the bolt located on the drill bit seat (2). The head seat part (11) is set as a convex-shaped block, and the wing tooth part (12) is set as a strip with a trapezoidal cross-section. The wing tooth part (12) is set to be arranged and distributed along the radial line of the outer end face of the extended part of the head seat part (11).

3. The wide-wing precession drill pipe device for coal mines according to claim 1, characterized in that: The barrel rod (4) is set as a tubular body with a threaded body at the front port and a threaded body at the rear end. The front port of the barrel rod (4) is set to be threadedly connected to the drill bit seat (2). The rear end head of the barrel rod (4) is set to be threadedly connected to the connecting seat (3), and the front part of the peripheral side surface of the barrel rod (4) is set to be connected to the spiral blade (5). The rear part of the peripheral side surface of the barrel rod (4) is set to be connected to the support rod (6).

4. The wide-wing precession drill pipe device for coal mines according to claim 1, characterized in that: The spiral blade (5) is set as a conical spiral blade. The end of the contracted end of the spiral blade (5) is set to be connected to the barrel rod (4), and the end of the extended end of the spiral blade (5) is set to be connected to the support rod (6).

5. The wide-wing precession drill pipe device for coal mines according to claim 1, characterized in that: The support rod (6) is set as a rod-shaped body. The inner end of the support rod (6) is set to be connected to the barrel rod (4), and the outer end of the support rod (6) is set to be connected to the spiral blade (5).

6. The wide-wing precession drill pipe device for coal mines according to claim 1, characterized in that: On the peripheral side surface of the extended part of the seat part (21) of the drill bit seat (2), a receiving hole body (22) is arranged. The contracted part of the seat part (21) is set to be threadedly connected to the barrel rod (4). The extended part of the seat part (21) is set to be receiving-connected to the drill bit (1), and the receiving hole body (22) is set to be threadedly connected to the bolt located on the drill bit (1). The seat part (21) is set as a convex-shaped tubular body with a stepped through hole, and the receiving hole body (22) is set as a threaded hole body.

7. The wide-wing precession drill pipe device for coal mines according to claim 1, characterized in that: The connecting seat (3) is set as a tubular body with a threaded body at the inner port and a through hole body on the peripheral side surface. The threaded body of the connecting seat (3) is set to be threadedly connected to the barrel rod (4), and the through hole body of the connecting seat (3) is set to be connected to the drilling rig through a pin shaft.

8. The wide-wing precession drill pipe device for coal mines according to any one of claims 1 to 7, characterized in that: The central axis of the drill bit (1), the central axis of the drill bit base (2), the central axis of the connecting base (3), and the central axis of the cylinder rod (4) are arranged on the same straight line. A spiral blade (5) and a support rod (6) are set to form a set of rotary cutting components, and at least three sets of rotary cutting components are arranged on the cylinder rod (4). The seat portion (21) is set to be coupled with the head seat portion (11).

9. The wide-wing precession drill pipe device for coal mines according to claim 8, characterized in that: The ratio between the length of the support rod (6) and the radius of the drill bit (1) is set to 1:2.75 - 2.95, and the ratio between the diameter of the cylinder rod (4) and the diameter of the extended portion of the head seat portion (11) is set to 1:1.08 - 1.1.

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