A kind of insertion and extraction tool for loading and unloading grooved steel pipe
By designing a channel steel pipe loading and unloading tool including wrench, main clamper and slave clamper, the time-consuming and labor-intensive problem during the loading and unloading of oil pipelines is solved, and efficient insertion and unloading of steel pipes and joints is achieved, and loading and unloading is improved. Efficiency and safety.
Patent Information
- Application Number
- CN202110782595.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-07-12
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2041-07-12
AI Technical Summary
The prior art When loading and unloading and disassembling oil pipelines, the weight of the channel steel pipes and frequent connection and disassembly operations lead to time-consuming and labor-intensive operation, and lack of efficient loading and unloading tools.
A channel steel pipe loading and unloading tool including a wrench, a main clamp and a slave clamp are designed. The steel pipe is clamped through hinges and rotary pins using lever, semi-arc plate, three-connection plate and telescopic slider. Push and pull and clamp the ring to ensure stable insertion and removal of the steel pipe and joints.
It improves the insertion/extraction efficiency of channel steel pipes and joints, reduces labor intensity during loading and unloading, ensures safety and efficiency of operation, and is suitable for outdoor environments.
Smart Images
Figure CN115366040B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a pipeline connecting tool, in particular to a grooved steel pipe loading and unloading tool. Background Art
[0002] In modern warfare, the main way to ensure wartime oil supply is to transport it through oil pipelines. Ensuring that the oil pipeline reaches the designated location in a timely and accurate manner to ensure the smooth flow of oil during wartime is a basic task that must be done in military struggle preparation. For large quantities of pipelines that are frequently connected and disassembled to replace the transportation site, frequent connection and disassembly operations are performed between the pipeline and the connector. Generally, the oil pipeline is made up of several grooved steel pipes connected by joints. During the connection process, the grooved steel pipes are laid flat on the ground along the pipeline direction one by one in advance. When the grooved steel pipes are connected to the grooved steel pipes, they need to be moved one by one and then docked. After the oil transportation operation is completed, the oil pipeline needs to be disassembled. Taking a 6m grooved steel pipe as an example, the weight is 32kg. The loading and unloading process is time-consuming and labor-intensive. It is urgent to invent a grooved steel pipe loading and unloading tool. Summary of the invention
[0003] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and to provide a grooved steel pipe loading and unloading insertion and extraction tool, which has a simple structure, is easy to operate, integrates loading and unloading functions, and can realize the insertion / extraction of grooved steel pipes and joints.
[0004] The technical solution of the present invention is: comprising:
[0005] A wrench, the wrench comprising a lever, the upper end of the lever being a handle, the lower end of the lever being provided with a semi-arc plate three, the semi-arc plate three forming an arc-shaped opening, the upper part of the arc-shaped opening being an arc bottom one, and the lower part of the arc-shaped opening being an arc mouth one;
[0006] A main clamp, the main clamp comprising a connector clamp ring, the connector clamp ring is made of a semicircular arc plate, and the inner wall of the connector clamp ring has a convex rib that matches the annular groove in the middle of the outer circle of the connector;
[0007] A slave clamp, the slave clamp comprises a steel pipe clamp ring, the steel pipe clamp ring is made of two semicircular arc plates, the upper part of the steel pipe clamp ring is the second arc bottom, and the lower part of the steel pipe clamp ring is the second arc mouth; a clamping piece for clamping the outer circle of the steel pipe is provided on the steel pipe clamp ring, and the clamping piece comprises a retractable slider and a fixed block matched with the retractable slider;
[0008] Two connecting plates, the two connecting plates are symmetrically arranged on both sides of the arc opening 1 of the semi-arc plate 3 and the arc opening 2 of the steel pipe clamp; the semi-arc plate 3 and the steel pipe clamp are arranged on the left and the right along the length direction of the connecting plate;
[0009] The two ends of the connector clamp ring are hinged to the arc opening of the arc opening 1 at the lower end of the lever to form a hinge point 1, and one end of the two connecting plates are respectively hinged to the two sides of the outer wall of the semi-arc plate 3 at the upper part of the arc opening 1 to form a hinge point 3, and the hinge point 3 is located at the upper part of the hinge point 1. The other ends of the two connecting plates are hinged to the outer walls of the two ends of the steel pipe clamp ring to form a hinge point 2. The distance between the hinge point 1 and the hinge point 3 is the eccentric distance. The wrench swings along the hinge point 1. Due to the existence of the eccentric distance, the steel pipe clamp ring can be pushed or pulled to move a corresponding horizontal distance.
[0010] The retractable slider is movably mounted on a radial opening on the steel pipe clamp, and the fixed block is fixedly mounted on two radial openings on the steel pipe clamp, and the fixed block and the retractable slider are arranged opposite to each other; there are two hinge points two, the retractable slider is arranged at one hinge point two between the connecting plate and the steel pipe clamp, and a fixed block is arranged at the other hinge point two.
[0011] The retractable slider includes a slider body, a bolt fixed on the slider body, a rotating shaft, and a hexagonal nut. The inner flat hole of the hexagonal nut is connected to the outer flat square head at the outer end of the rotating shaft. The middle part of the rotating shaft passes through the shaft sleeve at the radial opening. The inner hole of the shaft sleeve is a step hole matched with the large head at the end of the rotating shaft. The inner end of the rotating shaft is threadedly connected with the bolt. The shaft sleeve is fixed to the steel pipe clamping ring, and its inner step hole is matched with the outer step shaft of the rotating shaft. When the hexagonal nut rotates, it drives the rotating shaft to rotate. The external thread of the bolt on the slider body and the internal thread of the rotating shaft produce axial movement under the side effect of the thread. When the slider body clamps the steel pipe, the outer step of the rotating shaft presses against the inner step of the shaft sleeve. The inner step of the shaft sleeve is the main force-bearing contact surface.
[0012] The steel pipe clamp ring is also provided with at least one auxiliary fixing block, and the auxiliary fixing block, the fixing block and the slider body are all nylon blocks. The auxiliary fixing block, the fixing block, the slider body and the steel pipe clamping contact surface that clamps the outer circle of the steel pipe are higher than the inner arc surface of the steel pipe clamp ring.
[0013] There are rotating pins three at both ends of the semi-arc plate three, one end of the steel pipe clamp is fixed to the steel pipe clamp fixed shaft, and the other end of the steel pipe clamp is fixed to the shaft sleeve, one end of the two connecting plates is sleeved on the rotating pin three to form a hinge point three, and the other ends of the two connecting plates are respectively sleeved on the steel pipe clamp fixed shaft and the end of the shaft sleeve to form a hinge point two. The connecting plate can swing along the rotating pin three, the steel pipe clamp fixed shaft and the shaft sleeve.
[0014] When in use: the connector clamp is fixed relative to the joint. When the wrench swings along the hinge point, the steel pipe clamp moves forward and backward relative to the connector clamp through the drive of the connecting plate, and the connector clamp is located within the motion track of the third inner wall of the semi-arc plate. When the wrench swings to the maximum limit position, the third inner wall of the semi-arc plate does not interfere with the outside of the connector clamp.
[0015] The inner cavity of the steel pipe clamp is a semi-cylindrical cavity, the outer wall of the steel pipe clamp is stepped, and the height of the outer wall of the steel pipe clamp close to the connector clamp is lower than the height of the outer wall of the steel pipe clamp far from the connector clamp.
[0016] There are two hinge points one, and the line L1 connecting the two hinge points one is located at the lower part of the center of the circle where the longitudinal section of the connector clamp is located; there are two hinge points two, and the line L2 connecting the two hinge points two is located at the lower part of the center of the circle where the longitudinal section of the steel pipe clamp is located; there are two hinge points three, and the line L3 connecting the two hinge points three is located at the upper part of the line L1 connecting the two hinge points one; during the working process, the steel pipe clamp always rides on the outer circle of the steel pipe during work and is not easy to flip over.
[0017] During use, hinge point one is always lower than hinge point two, and as hinge point three swings left and right around hinge point one, hinge point two moves back and forth horizontally.
[0018] The convex rib is located in the middle of the inner wall of the connector clamping ring, and the inner walls of the connector clamping ring on both sides of the convex rib are fitted with the outer circle of the connector on both sides of the annular groove in the middle of the connector.
[0019] The connector clamp ring fixing sleeve is fixed on both sides of the connector clamp ring, and the rotating pin shaft one is sleeved in the connector clamp ring fixing sleeve to form a hinge point one.
[0020] The convex rib clamps the annular groove of the joint, which can be unaffected by the outdoor wind and sand. The steel pipe clamp relies on the non-metallic fixing block, the auxiliary fixing block and the retractable slider to clamp the outer circle of the steel pipe, and there is a certain gap between the outer surface of the outer circle of the steel pipe, and the steel pipe clamp rides on the outer circle of the steel pipe. In the wild mountains and ridges, exposed to wind and sun, sunny and rainy, mud, weeds and other outdoor environments, the present invention can be used normally.
[0021] The present invention is designed in combination with the characteristics of the grooved steel pipe (referred to as the steel pipe) and the joint. During the insertion / extraction process of the grooved steel pipe and the joint, the inclined push / pull steel pipe clamp is pushed / pulled tighter and tighter, so that the steel pipe clamp is closely attached to the steel pipe and will not be separated from the steel pipe during the connection and insertion process, thereby improving work efficiency and operation safety. When in use, the wrench is manually pulled, and the rotating pin shaft 1 rotates along the inner hole of the connector clamp fixing sleeve of the lever wrench main clamp, and the rotating pin shaft 3 drives the two connecting plates to push and pull the slave clamp to move, thereby realizing the insertion / extraction of the grooved steel pipe and the joint. In the absence of a grooved steel pipe insertion tool, the present invention can complete the operation of loading and unloading grooved steel pipes, avoiding the replacement of operating tools during the loading and unloading of grooved steel pipes, and has high operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a schematic diagram of the structure of the present invention;
[0023] Figure 2 yes Figure 1 A magnified image of the AI department;
[0024] Figure 3 yes Figure 1 AA section view;
[0025] Figure 4 yes Figure 1 BB cross-sectional view;
[0026] Figure 5 yes Figure 1 CC section view;
[0027] Figure 6 yes Figure 1 A partial top view of
[0028] Figure 7 This is one of the use state diagrams of the present invention (without a sleeve, it can be directly used as an insertion tool);
[0029] Figure 8 This is the second use state diagram of the present invention (with sleeve)
[0030] Fig. 9 yes Figure 7 A cross-sectional view of
[0031] Fig.10 yes Figure 8 A cross-sectional view of
[0032] Fig.11 It is one of the steel pipe disassembly processes;
[0033] Fig.12 This is the second process of steel pipe disassembly;
[0034] Fig.13 It is a schematic diagram of the structure of the sleeve;
[0035] Fig.14 It is a schematic diagram of the two halves of the sleeve opening;
[0036] Fig.15 It is a top view of the sleeve. DETAILED DESCRIPTION
[0037] Figure 1-6In the invention, the grooved steel pipe 1 is used for loading and unloading. The grooved steel pipe 1 is referred to as the steel pipe. With the help of the sleeve, the steel locking ring 21 in the joint 2 is expanded, and then the steel pipe 1 is manually clamped, and finally the steel pipe 1 is pulled out. The invention includes a connector clamp 101, a rotating pin shaft 103, a connecting plate 104, a hexagonal nut 105, a rotating pin shaft 3 106, a steel pipe clamp 107, a connector clamp fixing sleeve 108, a steel pipe clamp fixing shaft 109, a wrench 110, a rotating shaft 111, a sliding bolt nylon block 112, a long fixed nylon block 113, and a short fixed nylon block 114. The cross section of the connector clamp 101 is T-shaped. The rotating pin shaft 103 is sleeved in the connector clamp fixing sleeve 108. The rotating pin shaft 3 106 sleeves the connecting plate 104. The cross section of the steel pipe clamp 107 is b-shaped.
[0038] The wrench 110 comprises a lever, the upper end of which is a handle, the lower end of which is connected to the semi-arc plate three via a reinforcing plate 1102, the semi-arc plate three forms an arc opening, the upper part of the arc opening is arc bottom one, and the lower part of the arc opening is arc mouth one.
[0039] The connector snap ring 101 and the connector snap ring fixing sleeve 108 fixed on both sides of the connector snap ring 101 constitute the main clamp. The two ends of the semi-arc plate three opening at the lower part of the wrench 110 are fixed with a rotating pin shaft 103. The axes of the two rotating pin shafts 103 coincide with each other, and the rotating pin shaft 103 is sleeved in the inner hole of the connector snap ring fixing sleeve 108 and can rotate along the inner hole of the connector snap ring fixing sleeve 108. The two sides of the semi-arc plate three at a distance from the two ends of the arc opening at the lower part of the wrench 110 are respectively fixed and welded with a rotating pin shaft 3 106, and the axes of the two rotating pin shafts 3 106 coincide with each other. The wrench 110 swings along the center of the rotating pin shaft 103 and the connector snap ring fixing sleeve 108, the connector snap ring fixing sleeve 108 is fixed in position, and the rotating pin shaft 103 rotates relatively. Under the action of the connector snap ring fixing sleeve 108, the wrench 110 and the rotating pin shaft 103 are limited to swing only along the center of the fixing sleeve during the swinging process.
[0040] The steel pipe clamp 107 and the steel pipe clamp fixed shaft 109 fixedly welded on one side of the steel pipe clamp 107 and the shaft sleeve 102 fixedly welded on the other side constitute the slave clamp. The steel pipe clamp fixed shaft 109 and the shaft sleeve 102 form an axis. The slave clamp also has fixed and sliding nylon blocks, etc.
[0041] One end of the two connecting plates 104 is sleeved on the end of the rotating pin shaft 3 106, and the other ends of the two connecting plates 104 are respectively sleeved on the steel pipe clamp ring fixed shaft 109 and the outer shaft of the steel pipe clamp ring fixed shaft sleeve 102. After the two ends of the two connecting plates 104 are sleeved, they can rotate relatively along the steel pipe clamp ring fixed shaft 109 and the steel pipe clamp ring fixed shaft sleeve 102.
[0042] The inner flat hole of the hexagonal nut 105 is connected to the outer flat square of the rotating shaft 111, and the inner thread of the rotating shaft 111 cooperates with the outer thread of the bolt in the slider body 112. By rotating the hexagonal nut 105, the rotating shaft 111 rotates, causing the slider body 112 to move relative axially, thereby causing the slider body 112 to slide along the guide hole, thereby achieving the purpose of clamping or loosening the steel pipe 1.
[0043] Figure 7 , 8 , 9, 10, during operation, the rib 1011 of the connector clamp 101 matches the annular groove 22 in the middle of the outer circle of the joint 2, and the steel pipe clamp 107 rides on the outer circle of the grooved steel pipe 1. The manual wrench 110 is turned, and the rotating pin 103 rotates along the inner hole of the connector clamp fixing sleeve 108 of the lever wrench main clamp, and the rotating pin 3 106 drives the two connecting plates 104 to push and pull the slave clamp to move.
[0044] The present invention can be roughly divided into insertion and extraction during use. First, the front end conical surface of the sleeve 6 is inserted into the annular gap between the mounting hole of the connector 2 and the outer diameter of the groove head 11 of the grooved steel pipe 1. During the process of inserting the sleeve into the annular gap through the present invention, when the lever is pulled to insert the sleeve, the main force-bearing surface is the right side of the rib 1011 of the connector clamping ring against the fitting surface of the right side groove wall of the annular groove 22, bearing the reaction force of the chain tension during the insertion process; the right side of the inner wall of the connector clamping ring is close to the right side outer circle of the connector 2, bearing the rotational torque during the insertion process. After the sleeve is inserted into place, the inner diameter of the steel locking ring expands. After releasing the lock on the steel pipe 1, use a general tool to rotate the nut to clamp the steel pipe through the telescopic slider, and then use the extraction tool to pull out the steel pipe 1. In the stress state during the extraction process, the main force-bearing surface is the left side groove wall of the annular groove 22 on the left side of the rib 1011.
[0045] Fig.11 , 12In the figure, the sleeve 6 is a cylindrical structure composed of two semicircular ring arc plates 606, and there is an operating head at the front end of the sleeve 6. The two semicircular arc plates of the sleeve 6 ride on the outer circle of the steel pipe 1 and form a full circle. The operating head at the front end of the sleeve 6 extends into the annular gap between the mounting hole of the joint 2 and the outer diameter of the groove head 11 of the grooved steel pipe 1. The left grooved steel pipe assembly moves rightward until the end face of the groove head faces the shoulder 26 of the joint 2. The left grooved steel pipe assembly consists of the grooved steel pipe 1 and the groove head clamp 23 sleeved in the groove head 11 of the grooved steel pipe 1. The wrench 110 of the present invention is pulled to the left, and the sleeve 6 is pushed from the clamp to continue to move right until the inner diameter of the steel locking ring 21 expands to the outer circle of the groove head snap ring 23. The handle of the wrench 110 is continued to be pulled to the maximum limit, and the hexagonal nut 105 is rotated to make the slider body 112 clamp the steel pipe 1. The handle of the wrench 110 is pulled to the right with force, and the left grooved steel pipe assembly moves to the left. The inner diameter of the steel locking ring 21 turns over the outer circle of the groove head snap ring 23, and then the handle of the wrench 110 continues to be pulled to the right to drive the left grooved steel pipe assembly to move to the left. The inner diameter of the steel locking ring 21 is elastically contracted along the outer circle inclined surface of the groove head snap ring 23, and the inner lip 302 of the tip of the inner lip edge 303 of the sealing rubber ring begins to separate from the outer circle of the grooved steel pipe, and continues to move to the left until the inner convex truncated cone 301 of the inner diameter of the sealing rubber ring contacts the groove head end face of the assembly, and then moves to the left (such as Fig.12 ) The inner lip 302 at the tip of the inner lip edge 303 of the sealing rubber ring is completely separated from the outer circle of the grooved steel pipe. The inner diameter of the steel locking ring 21 is elastically contracted from the outer circle inclined surface to the outer circle of the grooved steel pipe, and then continues to move to the left, and the left grooved steel pipe assembly is completely separated from the joint 2.
[0046] Fig.13 , 14 , 15, the front end of the sleeve has a chamfered corner portion 6061 on the outside, and the front end of the sleeve has a rounded corner portion 6062 on the inside. The chamfered corner portion 6061 and the rounded corner portion 6062 form a circle of working heads, and the inclination angle of the chamfered corner portion is about 37°. The outer wall of the sleeve is a cylindrical surface, and the inner wall of the sleeve is a stepped shape with a thin front part and a thick rear part. The sleeve is formed by butting two semicircular ring arc plates 606. The upper parts of the two semicircular ring arc plates 606 are connected by a sleeve connecting assembly. The lower parts of the two semicircular ring arc plates 606 are provided with mutually meshing teeth and tooth grooves, and the side walls of the two semicircular ring arc plates 606 are provided with hinge holes through the center and lower part. The handle 601 is a semicircular arc rod structure, which is formed by two semi-arc rods 604 connected together. The upper parts of the two semi-arc rods 604 are hinged through sleeve pins 602, and the lower parts of the two semi-arc rods 604 are hinged to the outer ends of the connecting rods 607. The inner ends of the connecting rods 607 are hinged to the middle of the hinge holes. A groove is provided in the middle of the upper ends of the two semi-circular ring arc plates 606; the connecting assembly includes a connecting block 603 and a sleeve pin 605. One end of the connecting block 603 is placed in the groove of one semi-circular ring arc plate 606, and the other end of the connecting block 603 is placed in the groove of the other semi-circular ring arc plate 606. When in use, lift the handle 601, and the two semi-circular ring arc plates 606 are opened.
Claims
1. A grooved steel pipe loading and unloading plugging and extraction tool, characterized in that: include: A wrench (110), the wrench (110) comprising a lever, the upper end of the lever being a handle, the lower end of the lever being provided with a semi-arc plate three, the semi-arc plate three forming an arc-shaped opening, the upper portion of the arc-shaped opening being an arc bottom one, and the lower portion of the arc-shaped opening being an arc mouth one; A main clamp, the main clamp comprising a connector clamp (101), the connector clamp (101) being made of a semicircular arc plate, the inner wall of the connector clamp (101) having a convex rib (1011) matching with an annular groove (22) in the middle of the outer circle of the connector (2); A slave clamp, the slave clamp comprising a steel pipe clamp (107), the steel pipe clamp (107) being made of a semicircular arc plate (2), the upper portion of the steel pipe clamp (107) being an arc bottom (2), and the lower portion of the steel pipe clamp (107) being an arc mouth (2); a clamping piece for clamping the outer circle of the steel pipe (1) is provided on the steel pipe clamp (107), the clamping piece comprising a retractable slider and a fixed block (113) cooperating with the retractable slider; Two connecting plates (104), the two connecting plates (104) are symmetrically arranged on both sides of the arc opening 1 of the semi-arc plate 3 and the arc opening 2 of the steel pipe clamping ring (107); the semi-arc plate 3 and the steel pipe clamping ring (107) are arranged on the left and right along the length direction of the connecting plate (104); The two ends of the connector clamp (101) are hinged to the two ends of the arc opening of the lower end of the lever to form a hinge point one, one end of the two connecting plates (104) are respectively hinged to the two sides of the outer wall of the semi-arc plate three at the upper part of the arc opening one to form a hinge point three, the hinge point three is located above the hinge point one, and the other ends of the two connecting plates (104) are hinged to the outer walls of the two ends of the steel pipe clamp (107) to form a hinge point two; The retractable slider is movably mounted on one radial opening on the steel pipe clamp (107); the fixed block (113) is fixedly mounted on two radial openings on the steel pipe clamp (107); the fixed block (113) and the retractable slider are arranged opposite to each other; there are two hinge points II, the retractable slider is arranged at one hinge point II between the connecting plate (104) and the steel pipe clamp (107), and a fixed block (113) is arranged at the other hinge point II; The telescopic slider comprises a slider body (112), a bolt fixed to the slider body (112), a rotating shaft (111), and a hexagonal nut (105); the inner flat hole of the hexagonal nut (105) is connected to the outer flat square head of the outer end of the rotating shaft (111); the middle of the rotating shaft (111) passes through a shaft sleeve (102) at a radial opening; the inner hole of the shaft sleeve (102) is a stepped hole matched with a large head at the end of the rotating shaft (111); and the inner end of the rotating shaft (111) is threadedly connected to the bolt; The two ends of the semi-arc plate three are provided with rotating pin shafts three (106), one end of the steel pipe clamp ring (107) is fixed to the steel pipe clamp ring fixing shaft (109), and the other end of the steel pipe clamp ring (107) is fixed to the shaft sleeve (102), one end of the two connecting plates (104) is sleeved on the rotating pin shaft three (106) to form a hinge point three, and the other ends of the two connecting plates (104) are respectively sleeved on the steel pipe clamp ring fixing shaft (109) and the end of the shaft sleeve (102) to form a hinge point two.
2. The grooved steel pipe loading and unloading plugging and extraction tool according to claim 1, characterized in that: At least one auxiliary fixing block (114) is also provided on the steel pipe clamping ring (107); the auxiliary fixing block (114), the fixing block (113) and the slider body (112) are all nylon blocks.
3. The grooved steel pipe loading and unloading plugging and extraction tool according to claim 1, characterized in that: When in use: the connector clamping ring is fixed relative to the joint (2); when the wrench (110) is swung along the hinge point, the steel pipe clamping ring (107) is driven by the connecting plate (104) to move forward and backward relative to the connector clamping ring (101), and the connector clamping ring (101) is located within the movement track of the third inner wall of the semi-arc plate.
4. The grooved steel pipe loading and unloading plugging and extraction tool according to claim 1, characterized in that: The inner cavity of the steel pipe clamp ring (107) is a semi-cylindrical cavity, the outer wall of the steel pipe clamp ring (107) is stepped, and the height of the outer wall of the steel pipe clamp ring (107) close to the connector clamp ring (101) is lower than the height of the outer wall of the steel pipe clamp ring (107) far from the connector clamp ring (101).
5. The grooved steel pipe loading and unloading plugging and extraction tool according to claim 1, characterized in that: There are two hinge points one, and a line L1 connecting the two hinge points one is located below the center (4) of the circle where the longitudinal section of the connector clamp (101) is located; there are two hinge points two, and a line L2 connecting the two hinge points two is located below the center (7) of the circle where the longitudinal section of the steel pipe clamp (107) is located; there are two hinge points three, and a line L3 connecting the two hinge points three is located above the line L1 connecting the two hinge points one; during use, the hinge point one is always lower than the hinge point two.
6. The grooved steel pipe loading and unloading plugging and extraction tool according to claim 1, characterized in that: The convex rib (1011) is located in the middle of the inner wall of the connector clamp ring (101), and the inner wall of the connector clamp ring (101) on both sides of the convex rib (1011) fits with the outer circle of the connector on both sides of the annular groove (22) in the middle of the connector (2).
7. The grooved steel pipe loading and unloading plugging and extraction tool according to claim 1, characterized in that: The connector clamp ring fixing sleeve (108) is fixed on both sides of the connector clamp ring, and the rotating pin shaft 1 (103) is sleeved in the connector clamp ring fixing sleeve (108) to form a hinge point 1.