Detachable extended part replacing claw for crane pipe
By designing the disassembled extension replacement claw, the cumbersome and difficult operation problems during the replacement of the crane pipe rotary joint is solved, and the stable replacement and in-situ positioning of the rotary joint is achieved, reducing the replacement cost and the dependence of professionals.
Patent Information
- Application Number
- CN202422591323.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-10-25
AI Technical Summary
The existing crane pipes have problems such as cumbersome operation, high difficulty and high cost during the replacement of rotary joints. In particular, the lack of special auxiliary tools leads to inconsistent position of the rotary joints after replacement, which affects the performance of use.
A disassembled extension replacement claw is designed, including the main clamping claw, extension rod and rotary clamping joint. By cooperating with each other, the rotary joint is stable to provide positioning and support to ensure that the rotary joint is in situ after replacement.
It reduces the difficulty and cost of replacing rotary joints, ensures the normal performance of the crane tube after replacement, simplifies the operation process, and reduces the dependence of professionals.
Smart Images
Figure CN223251537U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of steel structures, and in particular relates to a detachable extended replacement claw for a crane pipe. Background Art
[0002] As specialized equipment for fluid loading and unloading in the petrochemical industry, the crane pipe plays a vital role in liquid loading and unloading operations in the petroleum, chemical, and other industries. Its high safety, flexibility, long life, and intelligent features make it an indispensable and important piece of equipment in the fluid loading and unloading process. The crane pipe's specific structure is a retractable and movable tube, also known as a fluid loading and unloading arm. Compared to traditional hose connections, the crane pipe offers greater safety. Its reliable slewing mechanism and sealing performance effectively prevent safety hazards such as liquid leakage. The crane pipe is also retractable and movable, adapting to loading and unloading needs at different heights and directions, increasing the flexibility of loading and unloading operations.
[0003] The crane pipe is mainly composed of fixed, rotating, operating, balancing and other mechanisms and oil pipes. Among them, the rotary joint is carefully made of forged steel or aluminum alloy, equipped with double-row ball bearings and special stainless steel sealing rings, and can rotate flexibly. The balancing system includes counterweights, torsion springs, compression springs, tension springs and screws, as well as hydraulic and pneumatic balance, all of which can be operated with very little force. Compared with the old hose, the docking flexibility of the crane pipe is poor. In situations where the docking position needs to be adjusted frequently, the crane pipe may not be as convenient as the hose. However, in situations where safe, environmentally friendly and efficient loading and unloading are required, the advantages of the crane pipe are still obvious. The structural feature of the crane pipe is the multi-degree-of-freedom adjustment rotation function to adapt to liquid loading and unloading operations in different positions. From the loading and unloading type, it can be divided into upper loading and unloading and lower loading and unloading. These crane pipes can meet the liquid loading and unloading needs in different scenarios. Among them, there are many rotary joints involved in the lower loading and unloading structure of the crane pipe for loading and unloading automobiles. Since the rotation of each pipe section of the crane pipe depends on the rotary joint, the rotary joint is one of the accessories in the crane pipe that is most easily damaged and requires the most timely maintenance. If the rotary joint fails, the entire crane pipe may need to be replaced due to the complexity of the structure, which greatly increases the maintenance cost. Even if the partial rotary joint can be replaced, due to the different positional relationships between the various pipe bodies, the different positions of the rotary joints to be replaced, and the different positions of the two pipe bodies of the rotary joints to be replaced, once the rotary joint is removed, the position of the pipe body corresponding to the rotary joint will be displaced. There is no auxiliary tool that can restore the various pipe bodies to their original positions in time, which makes the crane pipe easily affect its original performance after the rotary joint is replaced, so that the operation process of replacing the rotary joint needs to be performed by professionals, and there is a lack of auxiliary tools that are specially adapted and can popularize the replacement operation. Utility Model Content
[0004] The purpose of the utility model is to provide a detachable extended replacement claw for a crane pipe, so as to solve the above-mentioned problem.
[0005] The two second clamping joints are respectively arranged on the two claw plates and the two second clamping joints are respectively arranged on the two claw plates, and a three-dimensional coordinated clamping gap is formed between the two clamping joints.
[0006] As a preferred solution: a threaded hole is processed on the main support frame, an external thread is processed on the outer wall of the main control rod, the main control rod is threadedly connected to the threaded hole, the movable plate includes a long strip plate body and a protrusion, each end of the long strip plate body is processed with a first connecting hole, the middle part of one side of the long strip plate body is fixedly connected with a protrusion, the top surface of the protrusion is processed with a second connecting hole hinged to the main control rod, and the middle part of the other side of the long strip plate body is provided with the first clamping joint.
[0007] As a preferred solution: each claw plate is processed with a corresponding long hole along the thickness direction of the plate, the length direction of each long hole is in the same direction as the length direction of the corresponding claw plate, each long hole is passed through a connecting short shaft, one end of the connecting short shaft is connected to the first connecting hole of the movable plate, and the connecting short shaft drives the movable plate to slide back and forth along the length direction of the long hole. When each connecting short shaft moves to one end of the long hole close to the main support frame, the two claw plates are in the limit state of retraction, and when each connecting short shaft moves to the other end of the long hole away from the main support frame, the two claw plates are in the limit state of opening.
[0008] As a preferred solution: the first clamping joint includes a first base body, a first screw and a first application plate. The first base body is arranged on the movable plate, the first screw is passed through the first base body, one end of the first screw is the first screwing end, and the other end of the first screw is hinged to the first application plate.
[0009] As a preferred solution: each second clamping joint includes a second base body, a second screw and a second application plate, the second base body is arranged on one side of its corresponding claw plate, the second screw is passed through the second base body, one end of the second screw is a second screwing end, and the other end of the second screw is hinged to the second application plate.
[0010] As a preferred solution: each rotating clamping joint includes an L-shaped rod and a third application plate, the horizontal end of the L-shaped rod is connected to the third application plate, and the vertical end of the L-shaped rod is hinged to its corresponding extension rod.
[0011] As a preferred solution: each extension rod includes a front rod, a telescopic rod, a rear rod, a first annular connecting piece and a second annular connecting piece. One end of the front rod is provided with a first annular connecting piece, and the first annular connecting piece is connected to its corresponding claw plate by a first connecting bolt. The other end of the front rod is fixedly connected to one end of the rear rod through the telescopic rod, and the other end of the rear rod is cooperated with a second annular connecting piece. The vertical end of the L-shaped rod body is passed through the second annular connecting piece, and the vertical end of the L-shaped rod body is detachably connected to the second annular connecting piece by a connecting nut.
[0012] As a preferred solution: the telescopic rod is replaced by a fixed rod, and both ends of the fixed rod are detachably connected to the front rod and the rear rod respectively.
[0013] Compared with the prior art, the beneficial effects of the present invention are:
[0014] The utility model can realize a stable and standardized replacement process of the rotary joint in the crane pipe through the mutual cooperation between the main clamping claws, the two extension rods and the two rotating clamping joints. Before the replacement, the main clamping claws, the two extension rods and the two rotating clamping joints cooperate with each other to realize synchronous clamping of the column in the crane pipe and a tube body adjacent to the rotating clamping joint to be replaced, thereby providing a positioning and support effect for a tube body adjacent to the rotating clamping joint to be replaced by relying on the column, and then disassembling the other adjacent tube body and the rotary joint of the rotary joint, thereby providing a reference control position for the replacement process of the rotary joint, which is conducive to reducing the difficulty of replacing the rotary joint, and can also ensure that the replaced rotary joint is in its original position, which is conducive to ensuring the normal performance of the crane pipe after the replacement, reducing the cost and difficulty of replacing parts, and standardizing the operation process of replacing parts, which is conducive to popularization. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] For ease of explanation, the present invention is described in detail with reference to the following specific embodiments and accompanying drawings.
[0016] Figure 1 This is a schematic diagram of the main structure of the utility model;
[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model in a top view when in use, in which the upright post of the crane pipe and an adjacent pipe body of the rotary joint are both in a clamped and fixed state;
[0018] Figure 3 Schematic diagram of the three-dimensional structure of the movable plate
[0019] Figure 4This is a schematic diagram of the main structure of the utility model in an expanded and opened state;
[0020] Figure 5 A schematic diagram of the main structure when the main clamping claw clamps a small-diameter column;
[0021] Figure 6 A schematic diagram of the three-dimensional structure of an extension rod of one structural form;
[0022] Figure 7 A schematic diagram of the three-dimensional structure of an extension rod of another structural form;
[0023] Figure 8 This is a schematic diagram of the top view of the structure of the utility model used on the crane pipe;
[0024] Figure 9 This is a schematic diagram of the three-dimensional structure of the utility model used on the crane pipe.
[0025] Figure: 1 - main clamping claw; 2 - extension rod; 2-1 - front rod; 2-2 - telescopic rod; 2-3 - rear rod; 2-4 - first annular connecting piece; 2-5 - second annular connecting piece; 3 - rotating clamping joint; 3-1 - L-shaped rod body; 3-2 - third application plate; 4 - main support frame; 5 - main control rod; 6 - movable plate; 6-1 - long strip plate body; 6-2 - bump; 6-3 - first connecting hole; 6-4 - second connecting hole ;7-first clamping joint;7-1-first seat;7-2-first screw;7-3-first application plate;8-claw plate;8-1-long hole;8-2-connecting short shaft;9-second clamping joint;9-1-second seat;9-2-second screw;9-3-second application plate;10-fine-caliber clamping gap;11-three-position coordinated clamping gap;20-crane pipe;21-column;22-delivery pipe;23-rotating joint. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described below through the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read. They are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose that can be achieved by the present invention. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.
[0027] It should also be noted here that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solution according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.
[0028] Specific implementation method 1: Combination Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9 To explain this embodiment, the detachable extended replacement claw in this embodiment is a positioning tool specially used in the crane pipe maintenance process, specifically comprising a main clamping claw 1, two extension rods 2 and two rotating clamping joints 3. The detachable extended replacement claw is specially implemented according to the structural characteristics of the crane pipe 20, wherein the main clamping claw 1 is used for positioning and gripping on the column 21 of the crane pipe 20, and the column 21 provides a total support and positioning effect for the detachable extended replacement claw, and the two rotating clamping joints 3 are used for clamping on the delivery pipe 22 of the crane pipe 20. The crane pipe 20 is an existing crane pipe, and the working principle of the crane pipe is the same as that of the existing crane pipe. The working principle of the column 21 in the crane pipe 20 is the same as that of the column in the existing crane pipe, and the working principle of the conveying pipe 22 in the crane pipe 20 is the same as that of the conveying pipe 22 in the existing crane pipe. The main clamping claw 1 includes a main support frame 4, a main control rod 5, a movable plate 6, a first clamping joint 7, two claw plates 8 and two second clamping joints 9. One end of the main control rod 5 is a force-applying screw end, and the other end of the main control rod 5 passes through the main support frame 4 and is hinged to the movable plate 6. A claw plate 8 is provided on each side of the main control rod 5. One end of each claw plate 8 is hinged to the main support frame 4, and the other end of each claw plate 8 is correspondingly connected to an extension Rod 2, one end of each extension rod 2 is detachably connected to its corresponding claw plate 8, and the other end of each extension rod 2 is correspondingly hinged with a rotating clamping joint 3, and a fine-diameter clamping gap 10 is formed between the two rotating clamping joints 3, and the fine-diameter clamping gap 10 is used to clamp the conveying pipe 22. The two ends of the movable plate 6 are respectively slidably matched with the two claw plates 8, the first clamping joint 7 is arranged on the movable plate 6, and the two second clamping joints 9 are respectively arranged on the two claw plates 8, and a three-position collaborative clamping gap 11 is formed between the first clamping joint 7 and the two second clamping joints 9, and the three-position collaborative clamping gap 11 is used to clamp the column 21.
[0029] The detachable extended replacement claw can save the replacement time of the rotary joint 23 in the crane pipe 20 through the mutual cooperation between the main clamping claw 1, the two extension rods 2 and the two rotating clamping joints 3, avoid excessive tedious operations during the operation process, and avoid the coaxiality and original position after the replacement being affected. It ensures that when the operator disassembles the rotary joint 23, the two tube bodies connected to it are in a fixed state before the other disassembly replacement state is performed, which is convenient for effectively ensuring the original position after replacing the rotary joint 23, and can also reduce the difficulty of replacing the rotary joint. The main clamping claw 1 has a stable effect in clamping the column 21 of the crane pipe 20 and is not easy to loosen and slip, thereby ensuring stability during the entire replacement process.
[0030] The detachable extended replacement claw is adapted to the unique structural form of the crane pipe 20 and can be used to replace the rotary joint 23 at different positions, solving the problem of difficult replacement of the rotary joint 23 and cumbersome operation.
[0031] The detachable extended replacement claw clamps the column 21 in the crane pipe 20, and at the same time uses two extension rods 2 and two rotating clamping joints 3 to cooperate with each other to clamp a part of the conveying pipe 22 connected to the rotary joint 23 to be replaced in the crane pipe 20, so that it is in its original position. The detachable extended replacement claw realizes a multi-position synchronous clamping and fixing state for the column 21 and the conveying pipe 22. In the process of clamping the pipe body, the two rotating clamping joints 3 are tightly clamped on the outer circumferential wall of the conveying pipe 22, thereby ensuring that the replaced rotary joint 23 is disassembled in its original position, reducing the difficulty of related operations caused by debugging of the rotary joint 23 due to inconsistent positions before and after disassembly, and ensuring that the replaced crane pipe 20 is in normal use.
[0032] Specific embodiment 2: This embodiment is a further limitation of specific embodiment 1. In this embodiment, a connecting hole with an internal thread is processed on the main support frame 4, and the connecting hole with an internal thread is a threaded hole. An external thread is processed on the outer wall of the main control rod 5, and the main control rod 5 is threadedly connected to the threaded hole. The movable plate 6 includes a long strip plate body 6-1 and a protrusion 6-2. A first connecting hole 6-3 is processed at each end of the long strip plate body 6-1, and a protrusion 6-2 is fixedly connected to the middle of one side of the long strip plate body 6-1. A second connecting hole 6-4 hinged to the main control rod 5 is processed on the top surface of the protrusion 6-2, and the first clamping joint 7 is provided in the middle of the other side of the long strip plate body 6-1.
[0033] Furthermore, the external threads on the outer wall of the main control rod 5 mate with the threaded holes on the main support frame 4, ensuring that the two claw plates 8 can control the degree of opening and closing when clamping the column 21, forming a clamping posture suitable for the column 21. To facilitate quick disassembly and installation, a first clamping joint 7 is provided in the middle of the other side of the long plate body 6-1. The first clamping joint 7 cooperates with the two second clamping joints 9 to achieve a three-position clamping effect, thereby ensuring stability and firmness when clamping the column 21.
[0034] Specific embodiment three: This embodiment is a further limitation of specific embodiment two. In this embodiment, each claw plate 8 is processed with a corresponding long hole 8-1 along its plate thickness direction. The length direction of each long hole 8-1 is in the same direction as the length direction of its corresponding claw plate 8. A connecting short shaft 8-2 is passed through each long hole 8-1. One end of the connecting short shaft 8-2 is connected to the first connecting hole 6-3 of the movable plate 6. The connecting short shaft 8-2 drives the movable plate 6 to slide back and forth along the length direction of the long hole 8-1. When each connecting short shaft 8-2 moves to one end of the long hole 8-1 close to the main support frame 4, the two claw plates 8 are in the limit state of retraction. When each connecting short shaft 8-2 moves to the other end of the long hole 8-1 away from the main support frame 4, the two claw plates 8 are in the limit state of opening.
[0035] The movable plate 6 in this embodiment slides back and forth along the length direction of the long holes 8-1 on the two claw plates 8 through the connecting short shaft 8-2, ensuring that the two claw plates 8 can achieve a stable clamping effect during use. When the connecting short shaft 8-2 drives the movable plate 6 to approach the main support frame 4 through the long hole 8-1, the two claw plates 8 are in an open state. When the connecting short shaft 8-2 drives the movable plate 6 to move away from the main support frame 4 through the long hole 8-1, it is in a tightened or retracted state, thereby facilitating the clamping and disassembly of the column 21 and / or the conveying pipe 22 in the crane pipe 20.
[0036] Specific embodiment four: This embodiment is a further limitation of specific embodiment one. In this embodiment, the first clamping joint 7 includes a first seat body 7-1, a first screw 7-2 and a first application plate 7-3. The first seat body 7-1 is set on the movable plate 6, and the first screw 7-2 is passed through the first seat body 7-1. One end of the first screw 7-2 is a first screwing end, and the other end of the first screw 7-2 is hinged to the first application plate 7-3.
[0037] In this embodiment, the first application plate 7-3 approaches the outer circumferential wall of the column by screwing the first screw 7-2, thereby realizing the process of gradual application and adhesion to the outside of the tube, and performing a continuous secondary clamping process based on the clamping of the column 21, thereby avoiding slipping and falling off during the clamping process, ensuring a stable and reliable support effect during clamping, and helping to improve the stability of component replacement.
[0038] Specific embodiment five: This embodiment is a further limitation of specific embodiments one, two, three or four. In this embodiment, each second clamping joint 9 includes a second base body 9-1, a second screw 9-2 and a second application plate 9-3. The second base body 9-1 is arranged on one side of its corresponding claw plate 8, and the second screw 9-2 is passed through the second base body 9-1. One end of the second screw 9-2 is a second screwing end, and the other end of the second screw 9-2 is hinged to the second application plate 9-3.
[0039] The second application plate 9-3 in this embodiment functions similarly to the first application plate 7-3, differing only in its greater flexibility in clamping position and effectiveness. When the second base 9-1 is hinged to the claw plate 8, its outer wall is threaded through the claw plate 8 via a screw and secured to the claw plate 8 via a nut. The second application plate 9-3 rotates synchronously with the rotation of the second base 9-1, ensuring stable clamping of the pipe segment at the desired location on the column 21.
[0040] Specific embodiment six: This embodiment is a further limitation of specific embodiments one, two, three, four or five. In this embodiment, each rotating clamping joint 3 includes an L-shaped rod body 3-1 and a third application plate 3-2. The horizontal end of the L-shaped rod body 3-1 is connected to the third application plate 3-2, and the vertical end of the L-shaped rod body 3-1 is hinged to its corresponding extension rod 2.
[0041] The third application plate 3-2 in this embodiment functions similarly to the first and second application plates 7-3 and 9-3, differing only in its greater flexibility in terms of clamping position and effectiveness. When the third application plate 3-2, driven by the second screw 9-2, is capable of steering, it adjusts its position to the desired section of the delivery tube 22, ensuring a stable clamping of the delivery tube 22.
[0042] The third application plate 3-2 in this embodiment ensures that when clamping the conveying tube 22, the position of the L-shaped rod 3-1 can be fixed by the existing nut component after the steering adjustment, thereby indirectly determining the steering position of the third application plate 3-2 and improving the stable application clamping performance of the third application plate 3-2.
[0043] In addition, the position of the L-shaped rod 3-1 is achieved by fixing the existing screw nut, which assists the third application plate 3-2 to be stably applied to the delivery tube 22, thereby providing a reference positioning effect for the replacement process of the rotary joint 23, enhancing the stability of the clamping, and reducing the difficulty of replacing the rotary joint 23. It is always ensured that the delivery tube 22 at this position is in its original position during the replacement of the rotary joint 23 and is not offset.
[0044] Specific embodiment seven: This embodiment is a further limitation of specific embodiments one, two, three, four, five or six. In this embodiment, each extension rod 2 includes a front rod 2-1, a telescopic rod 2-2, a rear rod 2-3, a first annular connecting piece 2-4 and a second annular connecting piece 2-5. One end of the front rod 2-1 is provided with a first annular connecting piece 2-4, and the first annular connecting piece 2-4 is connected to its corresponding claw plate 8 by a first connecting bolt. The other end of the front rod 2-1 is fixedly connected to one end of the rear rod 2-3 through the telescopic rod 2-2, and the other end of the rear rod 2-3 is cooperated with the second annular connecting piece 2-5. The vertical end of the L-shaped rod body 3-1 is passed through the second annular connecting piece 2-5, and the vertical end of the L-shaped rod body 3-1 is detachably connected to the second annular connecting piece 2-5 through a connecting nut.
[0045] In this embodiment, one end of the two extension rods 2 is detachably connected to the claw plate 8 by a first connecting bolt, and the other ends of the two extension rods 2 are respectively plugged into and matched with their corresponding L-shaped rod bodies 3-1, thereby ensuring rapid installation and removal during use. In addition, the arrangement of the extension rods 2 can adapt to the distance between the column 21 and the delivery pipe 22 under different distances and positioning conditions. Figure 6 and Figure 7 As shown, the extension rod 2 can be an existing flat sleeve-type tube body with screws and multiple screw holes, including a sub-tube and a mother tube, and multiple screw holes are respectively processed on the sub-tube and the mother tube. The total length can be adjusted by adjusting the length of the sub-tube extending in the mother tube, and the positioning and locking process of the sub-tube and the mother tube can be achieved by screwing the screws in the corresponding screw holes.
[0046] Another structural form is that the two ends of the telescopic rod 2-2 are respectively connected to the rear rod 2-3 and the front rod 2-1, shortening the telescopic range to form a structural form with two fixed ends cooperating with a telescopic section to achieve the process of fine-tuning the length. The main clamping claw 1 and the two rotating clamping joints 3 are adjusted to be securely clamped on their respective corresponding columns 21 and conveying pipes 22, and the telescopic rod 2-2 can provide a supporting effect.
[0047] Specific embodiment eight: This embodiment further defines specific embodiments one, two, three, four, five, or six. In this embodiment, the telescopic rod 2-2 is replaced with a fixed rod, the ends of which are detachably connected to the front rod 2-1 and the rear rod 2-3, respectively. This provides a fixed-length extension rod 2 structure for replacing the rotary joint 23 at the same position in the same-size crane tube 20. The present invention can manufacture different structural forms according to different situations.
[0048] The telescopic rod 2 - 2 in this embodiment is easy to disassemble and replace, thereby ensuring that when the telescopic rod 2 - 2 is maintained, it can be replaced with the fixed rod, thereby being unrestricted and avoiding affecting the use effect.
[0049] Working principle: By clamping the delivery pipe 22 that cooperates with one end of the rotary joint 23 at one position, the original position is fixed, and then the rotary joint 23 and the connecting pipe body at the other end are disassembled, and then a new rotary joint 23 is installed on the fixed pipe body at the original position.
[0050] The main clamping claw 1 is clamped on the column 21 near the rotary joint 23 that needs to be replaced. It can be clamped horizontally or tilted according to specific circumstances.
[0051] Specific operation process: First, the operator clamps the main clamping claw 1 on the column 21 near the rotary joint 23 that needs to be replaced. The operator holds the main clamping claw 1 with one hand and pulls the main support frame 4 with the other hand. The main support frame 4 drives the movable plate 6 on the claw plate 8 to move upward. At this time, the claw plate 8 is in a retracted state, thereby driving the first clamping joint 7 and the two second clamping joints 9 to be attached to the outer circumferential wall of the column 21, and screwing the main control rod 5 on the main clamping claw 1 so that the column 21 is in the three-position collaborative clamping gap 11 and is in a clamping state. Then the operator screws the screwing ends of the first screw 7-2 and the two second screws 9-2 so that the first application plate 7-3 on the first clamping joint 7 and the application plate 9-3 on the second clamping joint 9 are attached to the outer circumferential wall of the column for fixation. The operator then tightens the first The annular connecting piece 2-4 is installed on the claw plate 8 through the first connecting bolt, and the vertical end of each L-shaped rod body 3-1 is installed in the second annular connecting piece 2-5 on an extension rod 2 through a connecting nut. The horizontal end of the L-shaped rod body 3-1 is installed with a third application plate 3-2. The operator sticks the two third application plates 3-2 on the corresponding pipes in the delivery pipe 22 adjacent to the column 21, and screws the connecting nut under the L-shaped rod body 3-1 to fix the position of the third application plate 3-2, thereby realizing a two-way clamping process of the pipe at the corresponding position of the delivery pipe 22. Finally, the rotary joint 23 is replaced and the other end of the pipe body is disassembled. After disassembly, one end of the new rotary joint 23 is fixed on the pipe at the corresponding position of the original delivery pipe 22, and then the original pipe body or another new pipe body is installed on the other end of the rotary joint 23 to realize the joint replacement process at the original position.
Claims
1. A detachable extension replacement claw for a crane pipe, characterized by: The invention comprises a main clamping claw (1), two extension rods (2) and two rotating clamping joints (3), wherein the main clamping claw (1) comprises a main support frame (4), a main control rod (5), a movable plate (6), a first clamping joint (7), two claw plates (8) and two second clamping joints (9), one end of the main control rod (5) is a force-applying screwing end, the other end of the main control rod (5) passes through the main support frame (4) and is hinged to the movable plate (6), a claw plate (8) is provided on each side of the main control rod (5), one end of each claw plate (8) is hinged to the main support frame (4), and the other end of each claw plate (8) is correspondingly connected to An extension rod (2), one end of each extension rod (2) is detachably connected to its corresponding claw plate (8), the other end of each extension rod (2) is hinged to a corresponding rotating clamping joint (3), a fine-caliber clamping gap (10) is formed between the two rotating clamping joints (3), the two ends of the movable plate (6) are respectively slidably matched with the two claw plates (8), a first clamping joint (7) is provided on the movable plate (6), two second clamping joints (9) are respectively provided on the two claw plates (8), and a three-position coordinated clamping gap (11) is formed between the first clamping joint (7) and the two second clamping joints (9).
2. The detachable extension replacement claw for a crane pipe according to claim 1, characterized in that: The main support frame (4) is processed with a threaded hole, the outer wall of the main control rod (5) is processed with an external thread, and the main control rod (5) is threadedly connected to the threaded hole. The movable plate (6) comprises a long plate body (6-1) and a protrusion (6-2), and the two ends of the long plate body (6-1) are respectively processed with a first connection hole (6-3), the middle part of one side of the long plate body (6-1) is fixedly connected with the protrusion (6-2), and the top surface of the protrusion (6-2) is processed with a second connection hole (6-4) hinged to the main control rod (5), and the middle part of the other side of the long plate body (6-1) is provided with the first clamping joint (7).
3. The detachable extension replacement claw for a crane pipe according to claim 2, characterized in that: Each claw plate (8) is processed with a corresponding long hole (8-1) along the plate thickness direction thereof. The length direction of each long hole (8-1) is in the same direction as the length direction of the corresponding claw plate (8). A connecting short shaft (8-2) is passed through each long hole (8-1). One end of the connecting short shaft (8-2) is connected to the first connecting hole (6-3) of the movable plate (6). The connecting short shaft (8-2) drives the movable plate (6) to slide back and forth along the length direction of the long hole (8-1). When each connecting short shaft (8-2) moves to one end of the long hole (8-1) close to the main support frame (4), the two claw plates (8) are in a closed limit state. When each connecting short shaft (8-2) moves to the other end of the long hole (8-1) away from the main support frame (4), the two claw plates (8) are in an open limit state.
4. The detachable extension replacement claw for a crane pipe according to claim 1, characterized in that: The first clamping joint (7) comprises a first base (7-1), a first screw (7-2) and a first application plate (7-3); the first base (7-1) is arranged on the movable plate (6); the first screw (7-2) is passed through the first base (7-1); one end of the first screw (7-2) is a first screwing end; the other end of the first screw (7-2) is hingedly connected to the first application plate (7-3).
5. The detachable extension replacement claw for a crane pipe according to claim 1, characterized in that: Each second clamping joint (9) comprises a second base body (9-1), a second screw rod (9-2) and a second application plate (9-3); the second base body (9-1) is arranged on one side of its corresponding claw plate (8); the second screw rod (9-2) is passed through the second base body (9-1); one end of the second screw rod (9-2) is a second screwing end; the other end of the second screw rod (9-2) is hingedly connected to the second application plate (9-3).
6. A detachable extension replacement claw for a crane pipe according to claim 1, 2, 3, 4 or 5, characterized in that: Each rotating clamping joint (3) comprises an L-shaped rod body (3-1) and a third application plate (3-2), wherein the horizontal end of the L-shaped rod body (3-1) is connected to the third application plate (3-2), and the vertical end of the L-shaped rod body (3-1) is hinged to its corresponding extension rod (2).
7. The detachable extension replacement claw for a crane pipe according to claim 6, characterized in that: Each extension rod (2) comprises a front rod (2-1), a telescopic rod (2-2), a rear rod (2-3), a first annular connecting piece (2-4) and a second annular connecting piece (2-5); one end of the front rod (2-1) is provided with the first annular connecting piece (2-4); the first annular connecting piece (2-4) is connected to its corresponding claw plate (8) via a first connecting bolt; the other end of the front rod (2-1) is fixedly connected to one end of the rear rod (2-3) via the telescopic rod (2-2); the other end of the rear rod (2-3) is cooperatively provided with the second annular connecting piece (2-5); the vertical end of the L-shaped rod body (3-1) is inserted into the second annular connecting piece (2-5); and the vertical end of the L-shaped rod body (3-1) is detachably connected to the second annular connecting piece (2-5) via a connecting nut.
8. The detachable extension replacement claw for a crane pipe according to claim 7, characterized in that: The telescopic rod (2-2) is replaced by a fixed rod, and both ends of the fixed rod are detachably connected to the front rod (2-1) and the rear rod (2-3).