A drill pipe clamping device and method of use thereof

Abstract

The application discloses a drill rod clamping device and a use method thereof, and relates to the technical field of iron mouth opening machines.The drill rod clamping device comprises a protection plate assembly, a clamping hook assembly, a transmission rod assembly and an oil cylinder assembly; the displacement is converted into the rotation of the transmission rod through the oil cylinder, the counterclockwise rotation of a rotating arm is realized through the transmission rod, the rotating arm one drives the rotation of a rotating arm two through the connecting rod and the fixed shaft, so that the clamping of the drill rod is realized; or the clockwise rotation of the rotating arm one is realized through the transmission rod, the rotating arm one drives the rotation of the rotating arm two through the connecting rod and the fixed shaft, so that the loosening of the drill rod is realized; the drill rod clamping device clamps the drill rod through the clamping hook, so that the drill rod is accurately aligned with the iron mouth; when the drill rod is replaced, the drill rod is easy to replace because the lower part of the protection plate is notched without L-shaped support; the protection plate assembly is closely connected with the support through the fixed hook and the wedge, and is easy to disassemble and assemble; moreover, the upper and lower parts of the protection plate are connected through bolts, so that the whole protection plate does not need to be replaced when the protection plate is damaged, and the maintenance cost is reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of iron tapping machines, and relates to a drill rod clamping device and its usage method. Background Technology

[0002] The taphole opener is one of the key pieces of equipment in front of the blast furnace for ironmaking. Its function is to open the taphole at a certain angle, allowing molten iron to flow smoothly out of the channel, thus enabling modern blast furnace smelting. The taphole opener mainly consists of a drill rod support plate and a drilling section. However, when using the drill rod to open the taphole, the drill rod may deflect during the drilling process due to its excessive length, causing deviations in the drilling channel. Therefore, it is necessary to clamp and fix the drill rod.

[0003] Existing taphole machines have a drill rod support plate designed at the front end of the machine's rail beam to support the drill rod and complete the taphole opening operation. A heat insulation plate is also attached to the bottom plate of the support plate. However, the existing drill rod support plate only supports the drill rod and cannot prevent it from tilting upwards during the opening process. The heat insulation plate of the drill rod support plate is attached to the bottom plate with round head bolts and nuts, so the heat insulation plate cannot be replaced after the refractory material is sprayed. The drill rod support plate is a single piece, and it needs to be replaced as a whole when damaged, resulting in high maintenance costs. Replacing the drill rod requires removing it from the L-shaped groove of the drill rod bracket, which is a cumbersome operation. Summary of the Invention

[0004] This invention provides a drill rod clamping device and its usage method, which solves the problems in the prior art such as drill rod deflection during drilling due to excessive drill rod length, drill rod warping during the opening process, high maintenance costs of heat insulation plates, and cumbersome drill rod replacement operations. It improves work efficiency, saves costs, and ensures the safety of operators.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] On one hand, the present invention provides a drill pipe clamping device, including a clamping hook assembly, a transmission rod assembly, and a hydraulic cylinder assembly. The clamping hook assembly and the hydraulic cylinder assembly are connected by the transmission rod assembly. The hydraulic cylinder in the hydraulic cylinder assembly drives the first rotating arm and the second rotating arm in the clamping hook assembly to perform clamping or releasing actions on the drill pipe through the transmission rod assembly.

[0007] Furthermore, the clamping hook assembly also includes: a clamping hook support, which is fixed to the front end of the iron-opening machine rail beam; and a bearing seat, which is fixed on the clamping hook support.

[0008] One end of the first rotating arm is fixedly connected to the transmission rod assembly, and the other end of the first rotating arm is rotatably connected to the bearing seat; the first rotating arm is also hinged to one end of the first connecting rod, and the other end of the first connecting rod is hinged to the second rotating arm.

[0009] A fixed shaft is also fixedly connected to the second rotating arm, and the fixed shaft is rotatably connected to the clamping hook support.

[0010] Furthermore, the clamping hook support is fixed to the front end of the iron-opening machine rail beam by a first bolt assembly; the bearing seat is fixed to the clamping hook support by a second bolt assembly.

[0011] Furthermore, one end of the first rotating arm is fixedly connected to the transmission rod assembly via a third bolt assembly, and the other end of the first rotating arm is located inside the copper sleeve two of the bearing seat and is fixed by a retaining ring;

[0012] One end of the connecting rod is hinged to the rotating arm 1 via a pin fixing assembly, and the other end of the connecting rod is hinged to the rotating arm 2 via a pin fixing assembly.

[0013] The fixed shaft passes through the clamping hook support, and through the cooperation of the copper sleeve three and the sixth bolt assembly, and the copper sleeve four and the seventh bolt assembly, the fixed shaft is rotatably connected within the clamping hook support.

[0014] Furthermore, the transmission rod assembly includes a first transmission rod, one end of which is connected to a clamping hook assembly, and the other end is fixedly connected to one end of a second transmission rod. The other end of the second transmission rod is located inside the cylinder support and can rotate within the cylinder support. The second transmission rod is also connected to one end of a second connecting rod via a connecting part, and the other end of the second connecting rod is connected to the cylinder.

[0015] Furthermore, the other end of the first transmission rod is fixedly connected to one end of the second transmission rod via a flange and an eighth bolt assembly; the cylinder support is equipped with a spherical bearing, and a retaining ring is used to allow the other end of the second transmission rod to rotate within the cylinder support; the connecting part is interference-fitted onto the second transmission rod, and the connecting part is provided with a mounting hole for connecting to the second connecting rod, and a shaft, a retaining ring, and a copper sleeve are used to achieve the connection between the second transmission rod and the second connecting rod.

[0016] Furthermore, the cylinder assembly also includes a cylinder support, the cylinder is fixedly installed inside the cylinder support, and the cylinder support is fixedly installed on the track beam of the iron tapping machine.

[0017] Furthermore, the drill pipe clamping device also includes a protective plate assembly, which is connected to the clamping hook support.

[0018] Furthermore, the protective plate assembly includes an upper protective plate and a lower protective plate, which are fixedly connected by a ninth bolt assembly.

[0019] Furthermore, the present invention also provides a method of using the drill pipe clamping device as described in part or all of the above, including,

[0020] Clamping the drill pipe: The hydraulic cylinder extends and pushes the connecting rod 2 in the transmission rod assembly forward, thereby driving the transmission rod 2 in the transmission rod assembly to rotate counterclockwise. The transmission rod 2 drives the transmission rod 1 to rotate, which in turn drives the rotating arm 1 to rotate counterclockwise in the bearing seat. At the same time, the rotating arm 1 drives the rotating arm 2 to rotate clockwise around the fixed axis through the connecting rod 1, so that the rotating arm 1 and the rotating arm 2 close together, completing the clamping of the drill pipe.

[0021] Release the drill rod: The hydraulic cylinder retracts, causing the connecting rod 2 in the transmission rod assembly to retract, thereby causing the transmission rod 2 in the transmission rod assembly to rotate clockwise. The transmission rod 2 drives the transmission rod 1 to rotate, which in turn drives the rotating arm 1 to rotate clockwise within the bearing seat. At the same time, the rotating arm 1 drives the rotating arm 2 to rotate counterclockwise around the fixed axis through the connecting rod 1, so that the rotating arm 1 and the rotating arm 2 separate, releasing the drill rod.

[0022] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0023] The drill pipe clamping device uses a hydraulic cylinder-driven rod mechanism (hydraulic cylinder assembly and transmission rod assembly) to clamp the drill pipe with a clamping hook, ensuring precise alignment of the drill pipe with the iron tap. The hydraulic cylinder and transmission rod assembly convert displacement into rotation: the transmission rods (transmission rod one and transmission rod two) drive the first rotating arm to rotate counterclockwise, and the connecting rod one and the fixed shaft work together to drive the second rotating arm to rotate clockwise, thus clamping the drill pipe; or, the transmission rods (transmission rod one and transmission rod two) drive the first rotating arm to rotate clockwise, and the connecting rod one and the fixed shaft work together to drive the second rotating arm to rotate counterclockwise, thus releasing the drill pipe.

[0024] In addition, when replacing the drill pipe, the clamping mechanism can be loosened, and the drill pipe is easy to replace because there is no L-shaped support in the groove at the bottom of the protective plate; at the same time, the protective plate assembly is detachably connected to the clamping hook support through the wedge, making installation simple; moreover, the upper and lower parts of the protective plate are fixedly connected by bolts, so the whole plate does not need to be replaced after damage, reducing maintenance costs. Attached Figure Description

[0025] The accompanying drawings are incorporated in and form part of this specification, and together with the description serve to explain the principles of the invention.

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is an overall structural diagram of the drill pipe clamping device;

[0028] Figure 2This is a front view of the drill pipe clamping device;

[0029] Figure 3 Top view of the drill pipe clamping device;

[0030] Figure 4 Front view of the clamping hook assembly of the drill pipe clamping device;

[0031] Figure 5 Left view of the clamping hook assembly of the drill pipe clamping device;

[0032] Figure 6 for Figure 4 Sectional view along the AA direction;

[0033] Figure 7 for Figure 5 Sectional view in the CC direction;

[0034] Figure 8 for Figure 6 Sectional view in the BB direction;

[0035] Figure 9 for Figure 5 Sectional view in the DD direction;

[0036] Figure 10 This is a schematic diagram showing the connection between the transmission rod assembly and the hydraulic cylinder assembly in the drill pipe clamping device.

[0037] Figure 11 for Figure 10 Sectional view in the EE direction;

[0038] Figure 12 for Figure 10 Cross-sectional view in the GG direction;

[0039] Figure 13 for Figure 11 Sectional view in the FF direction;

[0040] Figure 14 Front view of the protective plate assembly of the drill pipe clamping device;

[0041] Figure 15 Left view of the protective plate assembly of the drill pipe clamping device;

[0042] Figure 16 A schematic diagram of the transmission rod assembly of the drill pipe clamping device;

[0043] Figure 17 Figure 1 shows the clamping hook assembly of the drill pipe clamping device in both loosening and clamping states. Figure 2(a) shows the structure of the clamping hook assembly when it loosens the drill pipe. Figure I Figure (c) shows a schematic diagram of the clamping hook assembly when it releases the drill rod. Figure IIFigure (b) shows a schematic diagram of the clamping hook assembly clamping the drill pipe. Figure I Figure (d) shows a schematic diagram of the clamping hook assembly clamping the drill pipe. Figure II .

[0044] Explanation of reference numerals in the attached drawings: 1 is the rail beam of the iron-opening machine; 3 is the drill rod; 2.1 is the clamping hook assembly; 2.2 is the transmission rod assembly; 2.3 is the hydraulic cylinder assembly; 2.4 is the protective plate assembly; 2.1.1 is the clamping hook support; 2.1.2 is the first bolt assembly; 2.1.3 is the bearing seat; 2.1.4 is the second bolt assembly; 2.1.5 is the first rotating arm; 2.1.6 is the first connecting rod; 2.1.7 is the second rotating arm; 2.1.11 is the second copper sleeve; 2.1.12 is the first retaining ring; 2.1.13 is the third bolt assembly; 2.1.14 is the sixth bolt assembly; 2.1.15 is the fixed shaft; 2.1 2.1.16 is copper sleeve three; 2.1.17 is copper sleeve four; 2.1.18 is the seventh bolt assembly; 2.2.1 is transmission rod one; 2.2.2 is the eighth bolt assembly; 2.2.3 is transmission rod two; 2.2.4 is connecting rod two; 2.2.5 is pin; 2.2.6 is retaining ring two; 2.2.7 is copper sleeve five; 2.3.1 is hydraulic cylinder; 2.3.2 is hydraulic cylinder support; 2.3.5 is spherical bearing; 2.3.6 is retaining ring three; 2.4.1 is upper protective plate; 2.4.2 is lower protective plate; 2.4.3 is wedge; 2.4.4 is the ninth bolt assembly; 2.4.5 is fixing hook. Detailed Implementation

[0045] Exemplary embodiments will now be described in detail. When the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0046] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0047] Example 1

[0048] See Figure 1-16 As shown, this embodiment provides a drill pipe clamping device, including a clamping hook assembly 2.1, a transmission rod assembly 2.2, and a hydraulic cylinder assembly 2.3. The clamping hook assembly 2.1 and the hydraulic cylinder assembly 2.3 are connected by the transmission rod assembly 2.2. The hydraulic cylinder 2.3.1 in the hydraulic cylinder assembly 2.3 drives the first rotating arm 2.1.5 and the second rotating arm 2.1.7 in the clamping hook assembly 2.1 through the transmission rod assembly 2.2 to complete the clamping or releasing action of the drill pipe 3.

[0049] Furthermore, combined with Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 As shown, the clamping hook assembly 2.1 further includes: a clamping hook support 2.1.1, which is fixed to the front end of the iron-opening machine rail beam 1; and a bearing seat 2.1.3, which is fixed on the clamping hook support 2.1.1.

[0050] Wherein, one end of the first rotating arm 2.1.5 is fixedly connected to the transmission rod assembly 2.2, and the other end of the first rotating arm 2.1.5 is rotatably connected to the bearing seat 2.1.3; the first rotating arm 2.1.5 is also hinged to one end of the first connecting rod 2.1.6, and the other end of the first connecting rod 2.1.6 is hinged to the second rotating arm 2.1.7;

[0051] A fixed shaft 2.1.15 is also fixedly connected to the rotating arm 2.1.7, and the fixed shaft 2.1.15 is rotatably connected to the clamping hook support 2.1.1.

[0052] Specifically, in combination Figure 4 , Figure 5 As shown, the clamping hook support 2.1.1 is fixed to the front end of the iron-opening machine rail beam 1 by the first bolt assembly 2.1.2; the bearing seat 2.1.3 is fixed to the clamping hook support 2.1.1 by the second bolt assembly 2.1.4.

[0053] Furthermore, combined with Figure 7 , Figure 8 , Figure 9 As shown, one end of the rotating arm 2.1.5 is fixedly connected to the transmission rod assembly 2.2 via the third bolt assembly 2.1.13, and the other end of the rotating arm 2.1.5 is located inside the copper sleeve 2.1.11 of the bearing seat 2.1.3 and is fixed by the retaining ring 2.1.12.

[0054] One end of the connecting rod 2.1.6 is hinged to the rotating arm 2.1.5 via a pin fixing assembly, and the other end of the connecting rod 2.1.6 is hinged to the rotating arm 2.1.7 via a pin fixing assembly.

[0055] The fixed shaft 2.1.15 passes through the clamping hook support 2.1.1, and through the cooperation of the copper sleeve 3 2.1.16 with the sixth bolt assembly 2.1.14 and the copper sleeve 4 2.1.17 with the seventh bolt assembly 2.1.18, the fixed shaft 2.1.15 is rotatably connected within the clamping hook support 2.1.1.

[0056] The fixed shaft 2.1.15 is fixedly connected to the rotating arm 2.1.7 via a stop block.

[0057] Specifically, in combination Figure 8 As shown, one end of the connecting rod 2.1.6 is hinged to the rotating arm 2.1.5 via a pin 1, a copper sleeve 6, and a tenth bolt assembly, and the other end of the connecting rod 2.1.6 is hinged to the rotating arm 2.1.7 via a pin 3, a copper sleeve 7, and an eleventh bolt assembly.

[0058] Furthermore, combined with Figure 10 , Figure 11 , Figure 16 As shown, the transmission rod assembly 2.2 includes a transmission rod 2.2.1, one end of which is connected to the clamping hook assembly 2.1, and the other end is fixedly connected to one end of a transmission rod 2.2.3. The other end of the transmission rod 2.2.3 is located inside the cylinder support 2.3.2 and can rotate within the cylinder support 2.3.2. The transmission rod 2.2.3 is also connected to one end of a connecting rod 2.2.4 via a connecting part, and the other end of the connecting rod 2.2.4 is connected to the cylinder 2.3.1.

[0059] Furthermore, combined with Figure 10-13 As shown, the other end of transmission rod 2.2.1 is fixedly connected to one end of transmission rod 2.2.3 via a flange and an eighth bolt assembly 2.2.2; the cylinder support 2.3.2 is equipped with a spherical bearing 2.3.5, which, together with a retaining ring 2.3.6, allows the other end of transmission rod 2.2.3 to rotate within the cylinder support 2.3.2; the connecting part is interference-fitted onto transmission rod 2.2.3, and the connecting part is provided with a mounting hole for connecting to connecting rod 2.2.4, and the connection between transmission rod 2.2.3 and connecting rod 2.2.4 is achieved through the use of a pin 2.2.5, a retaining ring 2.2.6, and a copper sleeve 2.2.7.

[0060] Furthermore, combined with Figure 10 As shown, the hydraulic cylinder assembly 2.3 also includes a hydraulic cylinder support 2.3.2. The hydraulic cylinder 2.3.1 is fixedly installed inside the hydraulic cylinder support 2.3.2, and the hydraulic cylinder support 2.3.2 is fixedly installed on the iron-opening machine rail beam 1.

[0061] Furthermore, combined with Figure 3 As shown, the drill pipe clamping device also includes a protective plate assembly 2.4, which is connected to the clamping hook support 2.1.1.

[0062] Furthermore, combined with Figure 14-15 As shown, the protective plate assembly 2.4 includes an upper protective plate 2.4.1 and a lower protective plate 2.4.2, which are fixedly connected by a ninth bolt assembly 2.4.4;

[0063] When installing the protective plate assembly 2.4, the opening on the upper protective plate 2.4.1 is placed in the upper shaft of the clamping hook support 2.1.1, and then the fixing hook 2.4.5 on the upper protective plate 2.4.1 is inserted into the opening at the front of the clamping hook support 2.1.1. After installation, the wedge 2.4.3 is inserted into the upper shaft of the support 2.1.1.

[0064] Example 2

[0065] Based on Example 1, this example also provides a method for using the drill pipe clamping device. For the specific process of loosening / clamping the drill pipe, please refer to [link to example 1]. Figure 17 As shown, specifically:

[0066] Clamping the drill pipe: The hydraulic cylinder 2.3.1 extends and pushes the connecting rod 2.2.4 in the transmission rod assembly 2.2 forward, thereby driving the transmission rod 2.2.3 in the transmission rod assembly 2.2 to rotate counterclockwise. The transmission rod 2.2.3 drives the transmission rod 2.2.1 to rotate, which in turn drives the rotating arm 2.1.5 to rotate counterclockwise within the bearing seat 2.1.3. At the same time, the rotating arm 2.1.5 drives the rotating arm 2.1.7 to rotate clockwise around the fixed shaft 2.1.15 through the connecting rod 2.1.6, so that the rotating arm 2.1.5 and the rotating arm 2.1.7 close together, completing the clamping of the drill pipe.

[0067] Release the drill rod: The retraction of the hydraulic cylinder 2.3.1 causes the connecting rod 2.2.4 in the transmission rod assembly 2.2 to retract, thereby causing the transmission rod 2.2.3 in the transmission rod assembly 2.2 to rotate clockwise. The transmission rod 2.2.3 drives the transmission rod 2.2.1 to rotate, which in turn drives the rotating arm 2.1.5 to rotate clockwise within the bearing seat 2.1.3. At the same time, the rotating arm 2.1.5 drives the rotating arm 2.1.7 to rotate counterclockwise around the fixed shaft 2.1.15 through the connecting rod 2.1.6, causing the rotating arm 2.1.5 to separate from the rotating arm 2.1.7, thus releasing the drill rod.

[0068] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention.

[0069] It should be understood that the present invention is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A drill pipe clamping device, characterized in that, The assembly includes a clamping hook assembly (2.1), a transmission rod assembly (2.2), and a hydraulic cylinder assembly (2.3). The clamping hook assembly (2.1) and the hydraulic cylinder assembly (2.3) are connected by the transmission rod assembly (2.2). The hydraulic cylinder (2.3.1) in the hydraulic cylinder assembly (2.3) drives the first rotating arm (2.1.5) and the second rotating arm (2.1.7) in the clamping hook assembly (2.1) to perform clamping or releasing actions on the drill pipe (3) through the transmission rod assembly (2.2). The clamping hook assembly (2.1) further includes: a clamping hook support (2.1.1), which is fixed to the front end of the iron-opening machine rail beam (1); and a bearing seat (2.1.3), which is fixed to the clamping hook support (2.1.1). 2.1.1) Above; One end of the first rotating arm (2.1.5) is fixedly connected to the transmission rod assembly (2.2), and the other end of the first rotating arm (2.1.5) is rotatably connected to the bearing seat (2.1.3); the first rotating arm (2.1.5) is also hinged to one end of the first connecting rod (2.1.6), and the other end of the first connecting rod (2.1.6) is hinged to the second rotating arm (2.1.7); A fixed shaft (2.1.15) is also fixedly connected to the second rotating arm (2.1.7), and the fixed shaft (2.1.15) is rotatably connected to the clamping hook support (2.1.1); The transmission rod assembly (2.2) includes a first transmission rod (2.2.1), one end of which is connected to the clamping hook assembly (2.1), and the other end is fixedly connected to one end of a second transmission rod (2.2.3). The other end of the second transmission rod (2.2.3) is located inside the cylinder support (2.3.2) and can rotate within the cylinder support (2.3.2). The second transmission rod (2.2.3) is also connected to one end of a second connecting rod (2.2.4) via a connecting part. The other end of the second connecting rod (2.2.4) is connected to the cylinder (2.3.1). It also includes a protective plate assembly (2.4), which is detachably connected to the clamping hook support (2.1.1).

2. The drill pipe clamping device according to claim 1, characterized in that, The clamping hook support (2.1.1) is fixed to the front end of the iron-opening machine rail beam (1) by the first bolt assembly (2.1.2); the bearing seat (2.1.3) is fixed to the front end of the iron-opening machine rail beam (1) by the second bolt assembly ( 2.1.4) Fixed to the clamping hook support ( 2.1.1) Above.

3. The drill pipe clamping device according to claim 1, characterized in that, One end of the rotating arm (2.1.5) is connected to a third bolt assembly ( 2.1.13) is fixedly connected to the transmission rod assembly (2.2), and the other end of the first rotating arm (2.1.5) is located inside the second copper sleeve (2.1.11) of the bearing seat (2.1.3) and fixed by the first retaining ring (2.1.12); One end of the first connecting rod (2.1.6) is hinged to the first rotating arm (2.1.5) via a pin fixing assembly, and the other end of the first connecting rod (2.1.6) is hinged to the second rotating arm (2.1.7) via a pin fixing assembly; The fixed shaft (2.1.15) passes through the clamping hook support ( 2.1.1), through copper sleeve three (2.1.16) and the sixth bolt assembly (2.1.14), copper sleeve four (2.1.17) and the seventh bolt assembly ( The cooperation of 2.1.18) enables the fixed shaft (2.1.15) to be positioned on the clamping hook support ( Rotary connection within 2.1.1).

4. The drill pipe clamping device according to claim 1, characterized in that, The other end of transmission rod one (2.2.1) is fixedly connected to one end of transmission rod two (2.2.3) via a flange and an eighth bolt assembly (2.2.2); the cylinder support (2.3.2) is provided with a spherical bearing (2.3.5), which, together with retaining ring three (2.3.6), allows the other end of transmission rod two (2.2.3) to rotate within the cylinder support (2.3.2); the connecting part is interference-fitted onto transmission rod two (2.2.3), and the connecting part is provided with a mounting hole for connecting to connecting rod two (2.2.4), which, together with pin (2.2.5), retaining ring two (2.2.6), and copper sleeve five (2.2.7), realizes the connection between transmission rod two (2.2.3) and connecting rod two (2.2.4).

5. A drill pipe clamping device according to claim 1, characterized in that, The cylinder assembly (2.3) also includes a cylinder support, the cylinder (2.3.1) is fixedly installed in the cylinder support (2.3.2), and the cylinder support (2.3.2) is fixedly installed on the iron-opening machine rail beam (1).

6. The drill pipe clamping device according to claim 1, characterized in that, The protective plate assembly (2.4) includes an upper protective plate (2.4.1) and a lower protective plate (2.4.2), which are fixedly connected by a ninth bolt assembly (2.4.4).

7. A method of using the drill pipe clamping device according to any one of claims 1-6, characterized in that, Specifically: Clamping the drill pipe: The hydraulic cylinder (2.3.1) extends and pushes the connecting rod two (2.2.4) in the transmission rod assembly (2.2) forward, thereby driving the transmission rod two (2.2.3) in the transmission rod assembly (2.2) to rotate counterclockwise. The transmission rod two (2.2.3) drives the transmission rod one (2.2.1) to rotate, which in turn drives the rotating arm one (2.1.5) to rotate counterclockwise in the bearing seat (2.1.3). At the same time, the rotating arm one (2.1.5) drives the rotating arm two (2.1.7) to rotate clockwise around the fixed shaft (2.1.15) through the connecting rod one (2.1.6), so that the rotating arm one (2.1.5) and the rotating arm two (2.1.7) close together, completing the clamping of the drill pipe. Release the drill rod: The hydraulic cylinder (2.3.1) retracts, causing the connecting rod two (2.2.4) in the transmission rod assembly (2.2) to retract, thereby causing the transmission rod two (2.2.3) in the transmission rod assembly (2.2) to rotate clockwise. The transmission rod two (2.2.3) drives the transmission rod one (2.2.1) to rotate, which in turn drives the rotating arm one (2.1.5) to rotate clockwise in the bearing seat (2.1.3). At the same time, the rotating arm one (2.1.5) drives the rotating arm two (2.1.7) to rotate counterclockwise around the fixed shaft (2.1.15) through the connecting rod one (2.1.6), so that the rotating arm one (2.1.5) and the rotating arm two (2.1.7) separate, releasing the drill rod.

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