Key splicing tool and key splicing method

Abstract

The present invention discloses a key splicing tool and a key splicing method, the key splicing tool comprises a frame, a splicing platform, a track platform and a clamping member, the frame comprises a working surface, a boss is arranged on the working surface, the boss comprises a side block surface connected to the working surface, the track platform is arranged on the working surface, the splicing platform is movably arranged on the track platform, the clamping member is movably arranged on the frame, the clamping member comprises a pressure arm, the pressure arm can be extended to the position corresponding to the splicing platform, and the pressure arm moves in a direction away from or close to the splicing platform relative to the splicing platform. In the key splicing tool and the key splicing method of the present invention, since the splicing platform can be close to the side block surface of the boss, the side of the inner key can be made to lean against the side block surface to achieve left-right alignment of the two inner keys, and the inner key is placed on the splicing platform, which can ensure the top-bottom alignment of the two inner keys, so the alignment error of the spliced ​​inner keys is small, and only one person is needed to complete the splicing, the operation is convenient, and the labor cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of rotary drilling rigs, and in particular to a key splicing tool and a key splicing method. Background Art

[0002] A rotary drilling rig is a construction machine suitable for drilling holes in building foundation projects. It is mainly suitable for the construction of sandy soil, clay soil, silty soil and other soil layers. It is widely used in various foundation construction projects such as bored piles, continuous walls and foundation reinforcement. It generally adopts a hydraulic crawler telescopic chassis, a self-lifting and foldable drill mast, a telescopic drill rod, automatic vertical detection and adjustment, digital display of hole depth, etc. The whole machine is generally operated with hydraulic pilot control and load sensing, and is easy and comfortable to operate.

[0003] At present, there are three main types of drill rods for rotary drilling rigs: machine-locked drill rods, friction drill rods and combined drill rods, all of which are composed of multiple sections of drill rods, with the inner section of the drill rod sleeved inside the outer section of the drill rod. In addition to the core section of the drill rod, each section of the drill rod has a set of internal key plates at the bottom to transmit torque and pressure. For example, taking the machine-locked drill pipe as an example, an external key and upper and lower locking plates are welded on the outer wall of the body of each drill pipe section. Except for the core drill pipe section, a group of internal key plates are welded on the inner wall of the bottom of the body of each drill pipe section, a total of three, evenly distributed along the circumference, and the inner diameter of the internal key plate of each drill pipe section is matched with a small gap between the outer diameter of the adjacent inner drill pipe section, which has a guiding effect; the lower locking plate of each drill pipe section and the adjacent external keys form multiple groups of pressurization ports, each group of three, evenly distributed along the circumference; a group of external keys adjacent to each drill pipe section and the drill pipe body form three drill pipe working slides evenly distributed along the circumference; the internal key plate of each outer drill pipe section can slide up and down in the working slide of the inner drill pipe section adjacent to it, and can enter the pressurization port, and act with the external key and the lower locking plate to transmit torque and pressure. When the drill pipe is working, the side of the inner key plate of the outer drill pipe contacts the side of the outer key of the inner drill pipe to transmit torque. The length of the inner key plate must be large enough so that the contact area between the inner key plate and the outer key is large enough to ensure that the strength and wear resistance of the inner key plate and the outer key meet the use requirements. The inner key plate is made of wear-resistant material and is forged into an arc shape and then processed. Because the length of the inner key plate that can be forged by the forging machine is limited, when the length of the inner key plate is too long, it cannot be made and needs to be made in two pieces, and then spliced ​​before use.

[0004] At present, when splicing the inner key plates, usually two sections of the inner key plates are placed on a flat ground first, two people fix the two ends of the inner key plates respectively, and one person performs spot welding and fixes them before performing base welding splicing. However, this splicing method has the following defects: 1. It requires the cooperation of three people, which takes a long time and has high labor costs; 2. When manually aligning the inner key plates, the error is too large, and it is impossible to achieve absolute alignment, and it is impossible to ensure that the ground is absolutely flat. The spliced ​​inner key plates have problems of misalignment and middle bulges; 3. Manual alignment and splicing cannot ensure the batch consistency of the size of the inner key plates, and the quality is uneven; 4. After the side of the inner key plate is misaligned, the side cannot be fully in contact with the outer key when transmitting torque, which will cause abnormal damage to the inner key plate and the outer key, and will cause abnormal wear of the inner key plate and the outer key, and reduce the service life; 5. After the inner key plate has misalignment and middle bulge problems, due to the small gap between the inner key plate and the drill pipe body, it will cause the drill pipe to get stuck and the extension and retraction will be difficult. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a key splicing tool and a key splicing method which are convenient for splicing the inner key of a rotary drilling rig and have a small inner key alignment error.

[0006] The present invention provides a key splicing tool, comprising a frame, a splicing platform, a track platform and a clamping member, wherein the frame comprises a working surface, the working surface is provided with a raised boss, the boss comprises a side stop surface connected to the working surface, the track platform is arranged on the working surface and is located on one side of the boss, the splicing platform is movably arranged on the track platform to approach or move away from the side stop surface of the boss, the clamping member is movably arranged on the frame, the clamping member comprises a pressure arm, the pressure arm can be extended to a position corresponding to the splicing platform, and the pressure arm moves relative to the splicing platform in a direction away from or close to the splicing platform.

[0007] In one embodiment, the splicing platform includes a base, a sliding portion and a bearing portion, the sliding portion and the bearing portion are respectively fixed to two opposite sides of the base, and the sliding portion is movably matched with the track platform.

[0008] In one embodiment, a sliding groove is provided on the sliding portion of the splicing platform; the track platform includes a base plate and a guide rail, the base plate is fixed to the working surface of the frame, the guide rail is arranged on the base plate, and the guide rail is located in the sliding groove of the sliding portion of the splicing platform and cooperates with the sliding groove.

[0009] In one embodiment, the bearing portion includes two sub-bearing portions, and the two sub-bearing portions are arranged on the base at intervals along an extension direction of the base.

[0010] In one embodiment, there are two clamping members, and the two clamping members are respectively provided corresponding to the two sub-bearing parts of the splicing platform.

[0011] In one embodiment, the clamping member also includes a support, a first rotating arm, a telescopic arm and a second rotating arm, the support is fixedly connected to the frame, the first rotating arm is rotatably connected to the support, the telescopic arm can be telescopically connected to the first rotating arm relative to the first rotating arm, and can be telescopically connected to the second rotating arm relative to the second rotating arm, and the pressure arm can be telescopically connected to the second rotating arm relative to the second rotating arm.

[0012] In one embodiment, a first shaft is provided on the support, the first rotating arm is rotatably sleeved on the first shaft, the first rotating arm includes a first sleeve and a first sleeve shaft, the first sleeve is sleeved on the first shaft, the second rotating arm includes a second sleeve and a second sleeve shaft, the first sleeve shaft and the second sleeve shaft are respectively telescopically arranged in the telescopic arm, and the pressure arm is telescopically sleeved in the second sleeve; the rotation direction of the first rotating arm relative to the support is perpendicular to the telescopic direction of the telescopic arm relative to the first rotating arm, the telescopic direction of the telescopic arm relative to the first rotating arm is parallel to the telescopic direction of the telescopic arm relative to the second rotating arm, and the rotation direction of the first rotating arm relative to the support is also parallel to the telescopic direction of the pressure arm relative to the second rotating arm.

[0013] The present invention also provides a key splicing method using the key splicing tool, comprising:

[0014] placing two inner keys on the bearing portion of the splicing platform;

[0015] Moving the splicing platform so that the sides of the two inner keys are both against the side stop surface of the boss of the frame, thereby aligning the sides of the two inner keys;

[0016] Moving the clamping member so that the pressure arm of the clamping member extends above the inner key;

[0017] driving the pressure arm of the clamping member to move toward the inner key and press the inner key;

[0018] Weld the two inner keys together;

[0019] driving the pressure arm of the clamping member to move in a direction away from the inner key to release the inner key;

[0020] removing the welded inner key from the key splicing tool;

[0021] Place the welded inner key into the drill pipe body and fix the inner key in the pipe body.

[0022] In one embodiment, the bearing portion includes two sub-bearing portions, and the two sub-bearing portions are arranged at intervals along the extension direction of the splicing platform. In the step of placing two inner keys on the bearing portion of the splicing platform, the two inner keys are respectively placed on the two sub-bearing portions of the splicing platform, and the ends of the two inner keys close to each other are located in the gap between the two sub-bearing portions, and the ends of the two inner keys close to each other are spaced a certain distance apart.

[0023] In one embodiment, in the step of moving the clamping member so that the pressure arm of the clamping member extends above the inner key, the pressure arm is positioned exactly in the middle of the inner key in the length and width directions of the inner key.

[0024] In the key splicing tool and key splicing method provided by the embodiment of the present invention, since the splicing platform can be close to the side block surface of the boss, the side edge of the inner key can be placed against the side block surface when splicing the inner key, so that the left and right alignment of the two inner keys is achieved. The inner key is placed on the splicing platform to ensure the upper and lower alignment of the two inner keys. Therefore, when the key splicing tool of the embodiment of the present invention is used to splice the inner keys, the alignment error of the spliced ​​inner keys is small, thereby ensuring the quality of the inner keys, making the inner keys less prone to wear and tear, and increasing their service life; and only one person is needed to complete the splicing, the operation is convenient, and the labor cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 The figure is a schematic diagram of the overall structure of a key splicing tool according to an embodiment of the present invention.

[0027] Figure 2 for Figure 1 Schematic diagram of the structure of the splicing platform of the key splicing tool shown.

[0028] Figure 3 for Figure 1 Schematic diagram of the structure of the track platform of the key splicing tool shown.

[0029] Figure 4 for Figure 1 Schematic diagram of the assembly of the clamping parts of the key splicing tool shown.

[0030] Figure 5 for Figure 1 An exploded schematic diagram of the clamping parts of the key splicing tool shown.

[0031] Figure 6 To use Figure 1 The key splicing tool shown is a top view schematic diagram of splicing internal keys.

[0032] Figure 7 To use Figure 1 A side view schematic diagram of the key splicing tool splicing an internal key.

[0033] Figure 8 The figure is a flow chart of a key splicing method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the description of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like 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 a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] The directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front”, “back”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0037] The terms "first", "second", "third" and the like are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0038] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0039] Please refer to Figure 1A key splicing tool according to an embodiment of the present invention comprises a frame 11, a splicing platform 13, a track platform 15 and a clamping member 17. The frame 11 comprises a working surface 112, on which a raised boss 114 is provided, and the boss 114 comprises a side stop surface 116 connected to the working surface 112. The track platform 15 is provided on the working surface 112 and is located on one side of the boss 114, and the splicing platform 13 is movably provided on the track platform 15 to approach or move away from the side stop surface 116 of the boss 114. The clamping member 17 is movably provided on the frame 11, and the clamping member 17 comprises a pressure arm 172, which can extend to a position corresponding to the splicing platform 13, and the pressure arm 172 moves relative to the splicing platform 13 in a direction away from or close to the splicing platform 13, thereby pressing the inner key placed on the splicing platform 13.

[0040] In the key splicing tool of the embodiment of the present invention, since the splicing platform 13 can be close to the side block surface 116 of the boss 114, the side edge of the inner key can be placed against the side block surface 116 when splicing the inner key, so that the left and right alignment of the two inner keys is achieved. The inner key is placed on the splicing platform 13 to ensure the upper and lower alignment of the two inner keys. Therefore, when the key splicing tool of the embodiment of the present invention is used to splice the inner keys, the alignment error of the spliced ​​inner keys is small, thereby ensuring the quality of the inner keys, making the inner keys less prone to wear and tear, and increasing their service life. Only one person is needed to complete the splicing, which is easy to operate and has low labor costs.

[0041] In this embodiment, the frame 11 further includes a roller 118, and the roller 118 is disposed at the bottom of the frame 11 to drive the frame 11 to move, thereby facilitating the movement of the entire key splicing tool and improving its ease of use.

[0042] Specifically, the side blocking surface 116 of the frame 11 is perpendicular to the working surface 112. It can be understood that the side blocking surface 116 may not be perpendicular to the working surface 112, and this is not limited here.

[0043] In this embodiment, please refer to Figure 2 The splicing platform 13 includes a base 132, a sliding portion 134 and a bearing portion 136, and the sliding portion 134 and the bearing portion 136 are respectively fixed to two opposite sides of the base 132. The sliding portion 134 is movably matched with the track platform 15, so that the splicing platform 13 can move on the track platform 15.

[0044] Specifically, the base 132 is disposed in a direction parallel to the side blocking surface 116 of the frame 11 .

[0045] Specifically, three sliding parts 134 are arranged at intervals at the bottom of the base 132. It is understood that the sliding part 134 can be one, two or other numbers. Specifically, a sliding groove 137 is provided on the sliding part 134 to facilitate the cooperation with the track platform 15. Specifically, the moving direction of the sliding part 134 can be perpendicular to the side block surface 116. Of course, the moving direction of the sliding part 134 may not be perpendicular to the side block surface 116, as long as it can approach or move away from the side block surface 116.

[0046] Specifically, the bearing part 136 includes two sub-bearing parts 1362, and the two sub-bearing parts 1362 are arranged on the base 132 at intervals along the extension direction of the base 132. In this way, when splicing the inner keys, the two inner keys can be placed on the two sub-bearing parts 1362 respectively, so that the ends of the two inner keys close to each other are located in the gap between the two sub-bearing parts 1362. In this way, the two inner keys can be welded conveniently, avoiding the combination of flux and the bearing part 136, and the inner keys and the bearing part 136 are welded together, which is more convenient to operate. It can be understood that the bearing part 136 can also be a whole, and it is necessary to pay attention to avoid welding the flux to the bearing part 136 during welding.

[0047] Specifically, the side surface of the bearing portion 136 away from the base 132 is an arc surface, and the diameter of the arc surface is less than or equal to the diameter of the outer side surface of the inner key. In this way, the bearing portion 136 can stably support the inner key and prevent the inner key from shaking on the bearing portion 136. When the diameter of the arc surface is less than the diameter of the outer side surface of the inner key, the bearing portion 136 has two straight line contacts with the inner key; when the diameter of the arc surface is equal to the diameter of the outer side surface of the inner key, the bearing portion 136 is completely in contact with the inner diameter, and both situations can stably support the inner key. It can be understood that the side surface of the bearing portion 136 away from the base 132 may not be an arc surface, and two spaced convex strips are set on the side surface of the bearing portion 136 away from the base 132, so that the bearing portion 136 can also form two straight line contacts with the inner key, and can also be in stable contact.

[0048] In this embodiment, please refer to Figure 3 The track platform 15 includes a bottom plate 152 and a guide rail 154. The bottom plate 152 is fixed to the working surface 112 of the frame 11, and the guide rail 154 is arranged on the bottom plate 152. The guide rail 154 is located in the sliding groove 137 of the sliding portion 134 of the splicing platform 13, and cooperates with the sliding groove 137 to achieve sliding cooperation between the splicing platform 13 and the track platform 15.

[0049] Specifically, three guide rails 154 are disposed at intervals on the bottom plate 152 . The number of the guide rails 154 may correspond to the number of the sliding parts 134 of the splicing platform 13 , and is not limited to three.

[0050] Specifically, a fixing hole 156 is formed on the bottom plate 152 , so that a fastener can pass through the fixing hole 156 to achieve a fixed connection with the frame 11 .

[0051] In this embodiment, there are two clamping members 17 , and the two clamping members 17 are respectively provided corresponding to the two sub-bearing parts 1362 of the splicing platform 13 to respectively press the two inner keys. Specifically in this embodiment, the clamping member 17 is fixed on the boss 114 of the frame 11 .

[0052] In this embodiment, please refer to Figure 4 and Figure 5 The clamping member 17 further includes a support 174, a first rotating arm 175, a telescopic arm 176, and a second rotating arm 177. The support 174 is fixedly connected to the frame 11, the first rotating arm 175 is rotatably connected to the support 174, the telescopic arm 176 can be telescopically connected to the first rotating arm 175 relative to the first rotating arm 175, and can be telescopically connected to the second rotating arm 177 relative to the second rotating arm 177, and the pressure arm 172 can be telescopically connected to the second rotating arm 177 relative to the second rotating arm 177.

[0053] Specifically, the clamping member 17 further includes an insertion rod 178 , which is inserted into the pressure arm 172 to drive the pressure arm 172 to rotate relative to the second rotating arm 177 .

[0054] Specifically, the support 174 is provided with a first shaft 1742, the first rotating arm 175 is rotatably sleeved on the first shaft 1742, and a retaining ring 1744 is provided on the first shaft 1742. The two retaining rings 1744 are respectively located at both ends of the first rotating arm 175, so as to prevent the first rotating arm 175 from moving along the axial direction of the first shaft 1742 on the first shaft 1742. The first rotating arm 175 includes a first sleeve 1752 and a first sleeve shaft 1754, and the first sleeve 1752 is sleeved on the first shaft 1742. The second rotating arm 177 includes a second sleeve 1772 and a second sleeve shaft 1774, and the first sleeve shaft 1754 and the second sleeve shaft 1774 are respectively telescopically arranged in the telescopic arm 176. The pressurizing arm 172 is telescopically sleeved in the second sleeve 1772. More specifically, the first sleeve shaft 1754 and the second sleeve shaft 1774 are respectively threadedly connected to the telescopic arm 176, and the pressure arm 172 is threadedly connected to the second sleeve 1772. By rotating the telescopic arm 176, the first rotating arm 175 and the second rotating arm 177 can be extended and retracted relative to the telescopic arm 176, and by rotating the pressure arm 172, the pressure arm 172 can be extended and retracted relative to the second rotating arm 177. It can be understood that the first rotating arm 175, the second rotating arm 177 and the telescopic arm 176, and the pressure arm 172 and the second rotating arm 177 can also be extended and retracted through other structures, such as a piston structure. Specifically, the rotation direction of the first rotating arm 175 relative to the support 174 is perpendicular to the telescopic direction of the telescopic arm 176 relative to the first rotating arm 175, the telescopic direction of the telescopic arm 176 relative to the first rotating arm 175 is parallel to the telescopic direction of the telescopic arm 176 relative to the second rotating arm 177, and the rotation direction of the first rotating arm 175 relative to the support 174 is also parallel to the telescopic direction of the pressure arm 172 relative to the second rotating arm 177.

[0055] Specifically, the pressure arm 172 includes a head 1722 and a rod 1724, and the rod 1724 is inserted into the second sleeve 1772 of the second rotating arm 177. The head 1722 is provided with an insertion hole 1726, and the insertion rod 178 is inserted into the insertion hole 1726 to facilitate the rotation of the pressure arm 172.

[0056] Please refer to Figure 6 and Figure 7When the key splicing tool of this embodiment is used to splice the inner keys, first, the two inner keys 91 are placed on the two sub-bearing parts 1362 respectively; then the splicing platform 13 is moved so that the inner keys 91 are against the side blocking surface 116, so that the side surfaces of the two inner keys 91 are aligned; then the first rotating arm 175 is rotated, and the telescopic arm 176 is rotated so that the center of the pressure arm 172 is above the middle position of the inner key 91; then the insertion rod 178 is rotated to make the pressure arm 172 descend and press on the inner key 91; after the inner keys are pressed, the two inner keys are welded together, and then the inner keys are removed from the key splicing tool; finally, the inner key is placed in the pipe body of the drill pipe of the rotary drilling rig, the inner key is first welded to the side of the pipe body, and then the two inner key grooves are filled with welding, thereby completing the splicing of the inner keys.

[0057] It can be understood that the key splicing tool of this embodiment can be used to splice the internal key of the rotary drilling rig, and can also be used to splice the internal key used on other equipment, without limitation. The key splicing tool of this embodiment can splice the internal key or the external key, without limitation.

[0058] The present invention also provides a key splicing method for internal key splicing using the key splicing tool, see Figure 8 , a key splicing method of an embodiment comprises the following steps:

[0059] S11 , placing the two inner keys 91 on the bearing portion 136 of the splicing platform 13 .

[0060] Specifically, in step S11, the two inner keys 91 are placed on the two sub-bearing parts 1362 of the splicing platform 13, and the ends of the two inner keys 91 close to each other are located in the gap between the two sub-bearing parts 1362, and the ends of the two inner keys 91 close to each other are separated by a certain distance. More specifically, the distance between the ends of the two inner keys 91 close to each other can be about 3 mm, so that the flux can be better integrated with the two inner keys 91 during welding, and the welding quality is better.

[0061] S13 , moving the splicing platform 13 , so that the sides of the two inner keys 91 are both against the side blocking surface 116 of the boss 114 of the frame 11 , so that the sides of the two inner keys 91 are aligned.

[0062] S15, move the clamping member 17 so that the pressure arm 172 of the clamping member 17 extends to the top of the inner key 91. Preferably, the pressure arm 172 is aligned with the middle of the inner key 91 in both the length and width directions of the inner key 91, so that the pressure arm 172 can more firmly press the inner key 91. Specifically, an indicator line can be drawn on the inner key 91 to indicate the middle position of the inner key in the length and width directions, so as to facilitate the alignment of the pressure arm 172.

[0063] Specifically, in step S15 , the first rotating arm 175 is rotated, and the telescopic arm 176 is rotated so that the first rotating arm 175 rotates relative to the support 174 , and the telescopic arm 176 is telescoped relative to the first rotating arm 175 and the second rotating arm 177 so that the center of the pressure arm 172 is above the inner key 91 .

[0064] S17 , driving the pressing arm 172 of the clamping member 17 to move toward the inner key 91 and press the inner key 91 .

[0065] Specifically, in step S17, the pressure arms 172 of the two clamping members 17 both move toward the inner keys 91, respectively pressing the two inner keys 91. Specifically, the insertion rod 178 is rotated, thereby driving the pressure arm 172 to rotate together. Due to the threaded connection between the pressure arm 172 and the second rotating arm 177, the pressure arm 172 rotates and moves downward relative to the second rotating arm 177, thereby causing the pressure arm 12 to move toward the inner key 172.

[0066] S19, welding the two inner keys 91 together.

[0067] Specifically, in step S19, the joints of the two inner keys 91 are first spot welded, and then a base weld is performed to achieve single-sided welding and double-sided forming.

[0068] S21 , driving the pressing arm 172 of the clamping member 17 to move in a direction away from the inner key 91 to release the inner key 91 .

[0069] Specifically, the method of releasing the inner key 91 in step S21 is similar to the method of pressing the inner key 91 in step S17, and will not be repeated here.

[0070] S23, removing the welded inner key 91 from the key splicing tool.

[0071] Specifically, after removing the inner key 91, the outer surface of the inner key may be polished to make it smooth.

[0072] S25, insert the welded inner key into the drill pipe body, and fix the inner key in the pipe body.

[0073] Specifically, in step S25, after the inner key is placed in the drill pipe body, the inner key is first welded to the side of the pipe body, and then the joint of the two inner keys 91 is welded again, so that the two inner keys are spliced. Specifically, when the joint of the two inner keys 91 is welded again, the grooves of the two inner keys 91 are filled with welding.

[0074] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0075] The above is only a specific embodiment of the present invention, but the protection scope of the present invention 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 present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A key splicing tool, characterized in that: The machine frame (11) comprises a machine frame (11), a splicing platform (13), a track platform (15) and a clamping member (17); the machine frame (11) comprises a working surface (112); a raised boss (114) is provided on the working surface (112); the boss (114) comprises a side stop surface (116) connected to the working surface (112); the track platform (15) is provided on the working surface (112) and is located on one side of the boss (114); the splicing platform (13) comprises a base (132), a sliding portion (134) and a bearing portion (136); the sliding portion (134) and the bearing portion (136) are respectively fixed to two opposite sides of the base (132); and a sliding groove (137) is provided on the sliding portion (134);The track platform (15) comprises a guide rail (154), wherein the guide rail (154) is arranged on the working surface (112), and the guide rail (154) is located in the sliding groove (137) of the sliding part (134) of the splicing platform (13) and cooperates with the sliding groove (137). The sliding part (134) can movably cooperate with the guide rail (154) of the track platform (15) to approach or move away from the side stop surface (116) of the boss (114). The bearing part (136) comprises two sub-bearing parts (1362), and the two sub-bearing parts (1362) are arranged along the base The seats (132) are arranged at intervals on the base (132) in the extension direction, the clamping member (17) is movably arranged on the frame (11), there are two clamping members (17), and the two clamping members (17) are respectively arranged corresponding to the two sub-bearing parts (1362) of the splicing platform (13), the clamping member (17) comprises a pressure arm (172), a support (174), a first rotating arm (175), a telescopic arm (176) and a second rotating arm (177), the support (174) is fixedly connected to the frame (11), and the support (174) is provided with a first shaft (174) 2), the first rotating arm (175) is rotatably connected to the first shaft (1742) of the support (174), the first rotating arm (175) comprises a first sleeve (1752) and a first sleeve shaft (1754), the first sleeve (1752) is sleeved on the first shaft (1742), the telescopic arm (176) can be telescopically connected to the first rotating arm (175) relative to the first rotating arm (175), and can be telescopically connected to the second rotating arm (177) relative to the second rotating arm (177), the pressurizing arm (172) can be telescopically connected to the second rotating arm (177) relative to the second rotating arm (177), 77) is telescopically connected to the second rotating arm (177), the second rotating arm (177) comprises a second sleeve (1772) and a second sleeve shaft (1774), the first sleeve shaft (1754) and the second sleeve shaft (1774) are respectively telescopically arranged in the telescopic arm (176), the pressure arm (172) is telescopically sleeved in the second sleeve tube (1772), the pressure arm (172) can be extended to a position corresponding to the splicing platform (13), and the pressure arm (172) moves relative to the splicing platform (13) in a direction away from or close to the splicing platform (13);The rotation direction of the first rotating arm (175) relative to the support (174) is perpendicular to the telescopic direction of the telescopic arm (176) relative to the first rotating arm (175); the telescopic direction of the telescopic arm (176) relative to the first rotating arm (175) is parallel to the telescopic direction of the telescopic arm (176) relative to the second rotating arm (177); the rotation direction of the first rotating arm (175) relative to the support (174) is also parallel to the telescopic direction of the pressure arm (172) relative to the second rotating arm (177).

2. The key splicing tool according to claim 1, characterized in that: The track platform (15) further comprises a bottom plate (152), wherein the bottom plate (152) is fixed to the working surface (112) of the frame (11), and the guide rail (154) is arranged on the bottom plate (152).

3. A key splicing method, using the key splicing tool as claimed in claim 1 or 2, characterized in that: The key splicing method comprises: placing two inner keys (91) on the bearing portion (136) of the splicing platform (13); Moving the splicing platform (13) so that the side edges of the two inner keys (91) are both against the side stop surface (116) of the boss (114) of the frame (11), thereby aligning the side edges of the two inner keys (91); Moving the clamping member (17) so that the pressure arm (172) of the clamping member (17) extends above the inner key (91); driving the pressure arm (172) of the clamping member (17) to move toward the inner key (91) and press the inner key (91); Welding the two inner keys (91) together; driving the pressure arm (172) of the clamping member (17) to move in a direction away from the inner key (91) to release the inner key (91); removing the welded inner key (91) from the key splicing tool; Place the welded inner key into the drill pipe body and fix the inner key in the pipe body.

4. The key splicing method according to claim 3, characterized in that: The bearing portion (136) comprises two sub-bearing portions (1362), and the two sub-bearing portions (1362) are arranged at intervals along the extension direction of the splicing platform (13). In the step of placing two inner keys (91) on the bearing portion (136) of the splicing platform (13), the two inner keys (91) are respectively placed on the two sub-bearing portions (1362) of the splicing platform (13), and the ends of the two inner keys (91) close to each other are located in the gap between the two sub-bearing portions (1362), and the ends of the two inner keys (91) close to each other are spaced a certain distance apart.

5. The key splicing method according to claim 3, characterized in that: In the step of moving the clamping member (17) so that the pressure arm (172) of the clamping member (17) extends to the top of the inner key (91), the pressure arm (172) is positioned exactly in the middle of the inner key (91) in the length and width directions of the inner key (91).

Images