A plug-in wrench for loading and unloading grooved steel pipes

Abstract

A plug-in wrench for loading and unloading grooved steel pipes, comprising: 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; a connector snap ring, the connector snap ring being made of a semi-circular arc plate one, the inner wall of the connector snap ring being provided with convex ribs; a steel pipe snap ring, the steel pipe snap ring being made of a semi-circular arc plate two; a clamping piece, the clamping piece comprising a clamping claw and a manual handle; two connecting plates, the two connecting plates being symmetrically arranged on both sides of the arc opening one of the semi-arc plate three and the arc opening two of the steel pipe snap ring; the two ends of the connector snap ring being hinged to the arc opening one of the arc-shaped opening at the lower end of the lever to form a hinge point one, one end of the two connecting plates being respectively hinged to both sides of the outer wall of the semi-arc plate three to form a hinge point three, and the other ends of the two connecting plates being hinged to the outer walls of both ends of the steel pipe snap ring to form a hinge point two. The operator of the present invention can perform pipeline loading and unloading operations upright, has high operating efficiency, is convenient to operate, and can realize the insertion / extraction of grooved steel pipes and joints.

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 plug-in wrench for loading and unloading grooved steel pipes. The operator can perform pipeline loading and unloading operations upright, avoid bending over for connection, have high operating efficiency, and be easy to operate. It 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 connector snap ring, the connector snap ring is made of a semicircular arc plate, and the inner wall of the connector snap ring has a convex rib that matches the annular groove in the middle of the outer circle of the connector;

[0007] A steel pipe clamp ring, wherein the steel pipe clamp ring is made of a semicircular arc plate 2, the upper part of the steel pipe clamp ring is an arc bottom 2, and the lower part of the steel pipe clamp ring is an arc mouth 2;

[0008] A clamping piece for clamping the outer circle of the grooved steel pipe, the clamping piece comprising a clamping claw and a manual handle for driving the clamping claw to clamp or loosen the outer circle of the steel pipe;

[0009] 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;

[0010] The two ends of the connector clamp are hinged to the arc opening 1 of the arc opening at the lower end of the lever to form a hinge point 1, one end of the two connecting plates are respectively hinged to the two sides of the outer wall of the semi-arc plate 3 to form a hinge point 3, the hinge point 3 is located above the hinge point 1, and the other ends of the two connecting plates are hinged to the outer walls of the two ends of the steel pipe clamp to form a hinge point 2.

[0011] The clamping head of the clamping jaw is slidably mounted in the radial hole of the steel pipe clamping ring; the clamping tail of the clamping jaw inserted in the guide groove on the upper part of the steel pipe clamping ring is flexibly connected with the movable guide connecting plate.

[0012] The clamping claw comprises two claw arms, which are formed by two action lever plates. The middle part of the action lever plate is hinged to the hinge seats on both sides of the steel pipe clamp ring to form a middle hinge point. A guide column is arranged in the vertical direction at the tail end of the action lever plate. The guide groove is an arc-shaped guide groove. The two arc-shaped guide grooves are symmetrically arranged on the support fixed on the upper part of the steel pipe clamp ring. The inner end of the guide column is inserted into the arc-shaped guide groove. The inner end of the guide column slides along the arc-shaped guide groove during the swinging process of the middle hinge point of the action lever plate. The movable guide connecting plate is arranged between the outer ends of the guide columns at the tail ends of the two action lever plates. The two ends of the movable guide connecting plate are provided with sliding surfaces matching the outer ends of the guide columns.

[0013] The head ends of the two acting lever plates form the clamping claws of the clamping claws, the head ends of the acting lever plates are hinged with the slider assembly to form the head end hinge points of the acting lever plates, and the slider assembly is slidably installed in the radial holes of the steel pipe clamp rings; the distance H1 from the axis of the guide column at the tail end of the acting lever plate to the middle hinge point is greater than the distance H2 from the head end hinge point of the acting lever plate to the middle hinge point.

[0014] The sliding surface is composed of a guide post stop camber surface and a guide inclined surface connected to the lower part of the guide post stop camber surface. The included angle of the two guide inclined surfaces at both ends of the movable guide connecting plate is 130° to 150°.

[0015] The manual handle is connected to the soft rope connecting hole of the movable guide connecting plate through a rope; the manual handle is installed on the upper part of the lever near the handle, and a fixed plate 1 is installed on the lever near the manual handle, and a fixed plate 2 is installed on the support. Guide holes are provided on both fixed plates 1 and 2, and the middle part of the rope passes through the guide holes on fixed plates 1 and 2. The upper end of the rope is connected to the manual handle, and the lower end of the rope is connected to the movable guide connecting plate. A soft rope connecting hole is provided in the middle of the upper end of the movable guide connecting plate.

[0016] The slider assembly comprises a nylon block, a ball stud mounted on the tail of the nylon block, and an action lever plate is hinged to a rotation fixing shaft of the action lever plate mounted on the head of the ball stud.

[0017] There are rotating pins three at both ends of the semi-arc plate three, and rotating pins two at both ends of the steel pipe clamp ring. One end of the two connecting plates is sleeved on the rotating pin three to form a hinge point three, and the other end of the two connecting plates is sleeved on the outer circle of the end of the rotating pin two to form a hinge point two; the connector clamp ring fixing sleeve is fixed on both sides of the connector clamp ring, and the rotating pin one is sleeved in the connector clamp ring fixing sleeve to form a hinge point one;

[0018] A clearance space is arranged on the second rotating pin shaft, and the clamping head of the clamping claw is slidably installed in the radial hole of the steel pipe clamping ring through the clearance space.

[0019] 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.

[0020] 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, and the line L2 connecting the two hinge points corresponds to the middle position of the clamping head of the clamping claw, which is convenient for the clamping head to clamp the steel pipe; there are two hinge points three, and the line L3 connecting the two hinge points three is located on 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.

[0021] 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.

[0022] The convex rib is located in the middle position 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; the connector clamping ring fixing sleeve is fixed on both sides of the connector clamping ring, and a rotating pin shaft is installed in the connector clamping ring fixing sleeve to form a hinge point one.

[0023] In the present invention, the manual handle is arranged near the handle. During operation, the manual handle can be operated at will while holding the handle of the wrench. The steel pipe can be clamped / released by pulling the manual handle, which is easy to use and has high operation efficiency.

[0024] 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.

[0025] 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

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 yes Figure 1 A partial enlarged view of

[0028] Figure 3 yes Figure 1 A partial cross-sectional view of

[0029] Figure 4 yes Figure 1 A partial cross-sectional view of

[0030] Figure 5 yes Figure 1 A partial cross-sectional view of

[0031] Figure 6 yes Figure 4 A partial enlarged view of

[0032] Figure 7 It is a structural schematic diagram of a movable guide connecting plate;

[0033] Figure 8 It is a usage state diagram of the present invention;

[0034] Fig. 9 yes Figure 8 A cross-sectional view of

[0035] Fig.10 It is one of the steel pipe disassembly processes;

[0036] Fig.11 This is the second process of steel pipe disassembly;

[0037] Fig.12 It is a schematic diagram of the structure of the sleeve;

[0038] Fig.13 It is a schematic diagram of the two halves of the sleeve opening;

[0039] Fig.14 is a top view of the sleeve;

[0040] Fig.15 is a schematic diagram of the support. DETAILED DESCRIPTION

[0041] Figure 1-7 The present invention is used for loading and unloading grooved steel pipes, which are referred to as steel pipes. With the help of a sleeve, the steel locking ring of the joint is expanded, and then the manual handle 31 is pulled to clamp the steel pipe, and finally the steel pipe is pulled out. The present invention includes a connector clamp 101, a manual handle 31, a brake rope 32, a support 33, a connecting plate 34, a steel pipe clamp 35, a movable guide connecting plate 301, an action lever plate 302, an action lever plate rotating fixed shaft 1 303, an action lever plate rotating fixed shaft 2 304, a ball head bolt 305, a slider assembly 306, and a wrench 110. The cross section of the connector clamp 101 is T-shaped. The rotating pin 103 is sleeved in the connector clamp fixing sleeve. The rotating pin 3 106 sleeves the connecting plate 34. Two arc guide grooves 3301, i.e., oblong holes, are symmetrically arranged on the support 33.

[0042] The wrench 110 comprises a lever, the upper end of which is a handle 1101, the lower end of which is connected to a semi-arc plate 3 via a reinforcing plate 1102, the semi-arc plate 3 forming an arc opening, the upper part of the arc opening being an arc bottom 1, and the lower part of the arc opening being an arc mouth 1.

[0043] The connector snap ring 101 and the connector snap ring fixing sleeve 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 bottom of the wrench 110 are fixed with a rotating pin shaft 103. The axes of the two rotating pin shafts 103 coincide, and the rotating pin shaft 103 is sleeved in the inner hole of the connector snap ring fixing sleeve and can rotate along the inner hole of the connector snap ring fixing sleeve. A rotating pin shaft 3 106 is fixed and welded on both sides of the semi-arc plate three at a distance from the two ends of the arc opening at the bottom of the wrench 110, and the axes of the two rotating pin shafts 3 106 coincide. The wrench 110 swings along the center of the rotating pin shaft 103 and the connector snap ring fixing sleeve, the connector snap ring fixing sleeve is fixed in position, and the rotating pin shaft 103 rotates relatively. Under the action of the connector snap ring fixing sleeve, the wrench 110 and the rotating pin shaft 103 are restricted to swing only along the center of the fixing sleeve during the swinging process.

[0044] The steel pipe clamp 35 and the action lever plate 302 form a slave clamp. The two action lever plates 302 form two claw arms of the clamp. The middle of the action lever plate 302 is hinged to the hinge seats on both sides of the steel pipe clamp 35 through the action lever plate rotation fixed axis 1 303 to form a middle hinge point. The head ends of the two action lever plates 302 form the clamp of the clamp. The head ends of the action lever plates 302 are hinged to the slider assembly to form the head end hinge point of the action lever plates. The slider assembly 306 is slidably installed in the radial hole of the steel pipe clamp 35. The slider assembly 306 includes a nylon block and a ball stud 305 installed at the tail of the nylon block. The action lever plate 302 is hinged to the action lever plate rotation fixed axis 304 installed at the head of the ball stud 305.

[0045] There are two rotating pins 109 at both ends of the steel pipe clamp 35, one end of the two connecting plates 34 is mounted on the rotating pin 106 to form a hinge point 3, and the other end of the two connecting plates 34 is mounted on the outer circle of the end of the rotating pin 109 to form a hinge point 2, the connector clamp fixing sleeve is fixed on both sides of the connector clamp 101, and the rotating pin 103 is mounted in the connector clamp fixing sleeve to form a hinge point 1. There is a clearance space on the rotating pin 109, and the clamp of the clamping claw is slidably installed in the radial hole of the steel pipe clamp 35 through the clearance space.

[0046] The manual handle 31 is connected to the soft rope connection hole 3011 of the movable guide connecting plate 301 via the rope 32. The manual handle 31 is mounted on the upper part of the lever near the handle 1101, and a fixing plate 1 is mounted on the lever near the manual handle 31, and a fixing plate 2 is mounted on the support 33. Guide holes are provided on both the fixing plates 1 and 2, and the middle part of the rope 32 passes through the guide holes on the fixing plates 1 and 2. The upper end of the rope 32 is connected to the manual handle 31, and the lower end of the rope 32 is connected to the movable guide connecting plate 301, and the middle part of the upper end of the movable guide connecting plate 301 is provided with a soft rope connection hole 3011.

[0047] One end of the two connecting plates 34 is sleeved on the end of the rotating pin shaft 3 106 , and the other end of the two connecting plates 34 is sleeved on the outer circle of the end of the rotating pin shaft 2 109 .

[0048] Figure 8 , 9 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 35 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 of the lever wrench main clamp, and the rotating pin 3 106 drives the two connecting plates 34 to push and pull the slave clamp to move.

[0049] When clamping or loosening the steel pipe, the operator holds the handle 1101 on the wrench to operate the tool, pulls the manual handle 31, and the brake soft rope (referred to as rope) 32 connected below the manual handle 31 pulls the movable guide connecting plate 301 upward (the manual handle is released, and the movable guide connecting plate 301 returns to its original state downward), and the tail end of the lever plate 302 moves vertically to the outer end of the guide column of the movable guide connecting plate 301, leaves the guide column of the movable guide connecting plate 301, and swings outward along the guide inclined surface 3013, so that the lever plate 30 2 rotates at the middle hinge point, the head end of the lever plate moves inward, that is, the two claw arms of the clamp are in the tightening process, the inner end of the vertical guide column at the tail end of the lever plate 302 restricts the sliding of the arc guide groove, the outer end of the guide column at the tail end of the lever plate 302 is flexibly connected with the movable guide connecting plate 301, and the nylon block in the hinged slider assembly at the head end of the lever plate 302 shrinks as the ball head bolt installed at the tail end of the nylon block is tightened toward the head end of the lever plate, and slides to the radial hole of the steel pipe clamp ring, thereby achieving the purpose of clamping the steel pipe. The distance H1 from the axis of the guide column 307 at the tail end of the lever plate 302 to the middle hinge point is greater than the distance H2 from the hinge point at the head end of the lever plate to the middle hinge point. Taking H1 / H2=2.5 as an example, when the guide column 307 at the clamp tail has a 1kg outward moving force, the clamp tail has a 2.5 times inward tightening force.

[0050] 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.

[0051] Fig.10 , 11In 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.11 ) 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.

[0052] Fig.12 , 13 , 14, 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.

[0053] Fig.15In the figure, arc guide grooves 3301 are symmetrically distributed on both sides of the support 33, and the shape is like a horse hole. The distribution position of the arc guide grooves 3301 is such that the guide column 307 at the tail end of the lever plate 302 and the middle hinge point of the lever plate 302 swing to form an arc track.

Claims

1. A plug-in wrench for loading and unloading grooved steel pipes, characterized in that: include: A wrench (110), the wrench (110) comprising a lever, the upper end of the lever being a handle (1101), 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 opening one; A connector snap ring (101), wherein the connector snap ring (101) is made of a semicircular arc plate, and the inner wall of the connector snap ring (101) has a convex rib (1011) that matches the annular groove (22) in the middle of the outer circle of the connector (2); A steel pipe clamp ring (35), wherein the steel pipe clamp ring (35) is made of a semicircular arc plate 2, the upper part of the steel pipe clamp ring (35) is an arc bottom 2, and the lower part of the steel pipe clamp ring (35) is an arc mouth 2; A clamping piece for clamping the outer circumference of a grooved steel pipe, the clamping piece comprising a clamping claw and a manual handle (31) for driving the clamping claw to clamp or loosen the outer circumference of the steel pipe (1); Two connecting plates (34), the two connecting plates (34) 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 (35); the semi-arc plate 3 and the steel pipe clamping ring (35) are arranged on the left and right along the length direction of the connecting plate (34); The two ends of the connector clamp (101) are hinged to the arc opening 1 of the arc opening at the lower end of the lever to form a hinge point 1, one end of the two connecting plates (34) are respectively hinged to the two sides of the outer wall of the semi-arc plate 3 to form a hinge point 3, the hinge point 3 is located above the hinge point 1, and the other ends of the two connecting plates (34) are hinged to the outer walls of the two ends of the steel pipe clamp (35) to form a hinge point 2; The clamping head of the clamping jaw is slidably mounted in the radial hole of the steel pipe clamping ring (35); the clamping tail of the clamping jaw inserted in the guide groove on the upper part of the steel pipe clamping ring (35) is movably connected to the movable guide connecting plate (301); The clamping claw comprises two claw arms, and two action lever plates (302) form the two claw arms. The middle part of the action lever plate (302) is hinged to the hinge seats on both sides of the steel pipe clamp ring (35) to form a middle hinge point. A guide column (307) is arranged in the vertical direction at the tail end of the action lever plate (302). The guide groove is an arc-shaped guide groove (3301). The two arc-shaped guide grooves (3301) are symmetrically arranged on a support (33) fixed on the upper part of the steel pipe clamp ring (35). The inner end of the guide column (307) is inserted into the arc-shaped guide groove (3301). The movable guide connecting plate (301) is placed between the outer ends of the guide columns at the tail ends of the two action lever plates (302). Both ends of the movable guide connecting plate (301) are provided with sliding surfaces matching the outer ends of the guide columns. The head ends of the two action lever plates (302) form the clamping heads of the clamping claws. The head ends of the action lever plates (302) are hinged to the slider assembly to form the head end hinge points of the action lever plates. The slider assembly (306) is slidably mounted in the radial holes of the steel pipe clamp ring (35). The distance H1 from the axis of the guide column (307) at the rear end of the action lever plate (302) to the middle hinge point is greater than the distance H2 from the head end hinge point of the action lever plate to the middle hinge point. The two ends of the semi-arc plate three are provided with rotating pins three (106), the two ends of the steel pipe clamp ring (35) are provided with rotating pins two (109), one end of the two connecting plates (34) is sleeved on the rotating pins three (106) to form a hinge point three, and the other ends of the two connecting plates (34) are sleeved on the outer circle of the end of the rotating pins two (109) to form a hinge point two; the connector clamp ring fixing sleeve is fixed on both sides of the connector clamp ring (101), and the rotating pin one (103) is sleeved in the connector clamp ring fixing sleeve (108) to form a hinge point one; A clearance space is provided on the second rotating pin shaft (109), and the clamping head of the clamping jaw is slidably mounted in the radial hole of the steel pipe clamping ring (35) through the clearance space.

2. The insertion and extraction wrench for loading and unloading grooved steel pipes according to claim 1, characterized in that: The sliding surface is composed of a guide post stop cambered surface (3012) and a guide inclined surface (3013) connected to the lower part of the guide post stop cambered surface (3012). The included angle of the two guide inclined surfaces (3013) at both ends of the movable guide connecting plate (301) is 130° to 150°.

3. The insertion and extraction wrench for loading and unloading grooved steel pipes according to claim 1, characterized in that: The manual handle (31) is connected to a soft rope connection hole (3011) of a movable guide connection plate (301) via a rope (32); the manual handle (31) is mounted on an upper portion of a lever near the handle (1101); a fixing plate 1 is mounted on the lever near the manual handle (31); a fixing plate 2 is mounted on the support (33); guide holes are provided on the fixing plates 1 and 2; the middle portion of the rope (32) passes through the guide holes on the fixing plates 1 and 2; the upper end of the rope (32) is connected to the manual handle (31); the lower end of the rope (32) is connected to the movable guide connection plate (301); and a soft rope connection hole (3011) is provided in the middle portion of the upper end of the movable guide connection plate (301).

4. The insertion and extraction wrench for loading and unloading grooved steel pipes according to claim 1, characterized in that: The slider assembly (306) comprises a nylon block, a ball stud (305) mounted on the tail of the nylon block, and an action lever plate (302) is hinged to an action lever plate rotation fixing shaft (304) mounted on the head of the ball stud (305).

5. The insertion and extraction wrench for loading and unloading grooved steel pipes 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 (35) is driven by the connecting plate (34) 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.

6. The insertion and extraction wrench for loading and unloading grooved steel pipes 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 of the circle where the longitudinal section of the steel pipe clamp (35) is located, and the line L2 connecting the two hinge points two corresponds to the middle position of the clamping head of the clamping claw; 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.

7. The insertion and extraction wrench for loading and unloading grooved steel pipes according to claim 1, characterized in that: The convex rib (1011) is located in the middle of the inner wall of the connector clamp (101), and the inner wall of the connector clamp (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); the connector clamp fixing sleeve is fixed on both sides of the connector clamp, and the rotating pin shaft 1 (103) is sleeved in the connector clamp fixing sleeve to form a hinge point 1.

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