Tool capable of assisting concentric butt joint of flange and pipeline
By designing a tool to assist the concentric docking of the flange and the pipeline, the adjustment of the coupling of the tie rod and the support rod sliding conduit is used to solve the problem of docking difficulties caused by the mismatch between the flange and the pipeline, and an efficient and stable docking effect is achieved.
Patent Information
- Application Number
- CN202421237119.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-05-31
AI Technical Summary
During the emergency repair of pipeline equipment, the diameter of the flange and the pipeline do not match, resulting in large gaps and difficulty in concentric docking. The vertical angle cannot be guaranteed during high-altitude welding, resulting in unstable docking and frequent air and water leakage.
A tool is designed to assist the flange to dock concentrically with the pipe, including flange fixing seats, adjusting levers, bases, strut sliding conduits, pipe struts, flange fixing bolts and handwheels. By adjusting the fit between the tie rod and the strut sliding conduit, the flange fixing seat can be concentric with the axis of the pipe to ensure that the flange surface is connected in parallel with the pipe cross-section.
The concentric docking between the flange and the pipeline is achieved, the work efficiency is improved, the labor intensity of workers is reduced, and the safety and smooth completion of emergency repair construction is ensured.
Smart Images
Figure CN222679999U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a tool for concentrically butting a flange with a pipeline during pipeline construction, belonging to the technical field of pipeline construction equipment. Background Art
[0002] When repairing pipeline equipment, it is a basic requirement that the gate flange and the pipeline are concentric. However, in actual repair construction, it is a common phenomenon that the connecting flange and the pipeline diameter do not match each other, resulting in a large gap between the flange and the pipeline and difficulty in concentric docking. Since pipeline equipment is generally located in a relatively harsh environment and the space is small and construction is difficult, welding can often be done with difficulty, but the pipeline cannot meet the process requirements after docking. Similarly, the operation of high-altitude welding flanges faces the same difficulties as ground pipelines in docking concentricity, and the vertical angle between the pipeline and the flange cannot be guaranteed. At present, the measure often taken for the non-concentric docking of flanges and pipelines is to use thickened flange asbestos pads to barely dock the pipelines, but this method often causes air and water leakage during subsequent use, and repeated repairs are required. Therefore, how to keep the flange and the pipeline concentric for maintenance and connection is an urgent problem to be solved by technicians and construction personnel. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a tool that can assist in the concentric docking of a flange and a pipeline. The tool can adapt to various types of pipe diameters, so that the flange and the pipeline remain concentric, and the flange plane is parallel to the pipeline cross section and docked, thereby improving work efficiency, reducing the labor intensity of workers, and ensuring the safe and smooth completion of emergency repair construction.
[0004] The technical solution to solve the above technical problems is:
[0005] A tool that can assist in the concentric docking of a flange and a pipeline, comprising a flange fixing seat, an adjusting rod, a base, a support rod sliding guide tube, a pipeline support rod, a flange fixing bolt, and a handwheel. The flange fixing seat is a disc steel plate, the flange fixing seat is connected to the docking flange through the flange fixing bolt, the disc of the flange fixing seat has a central screw hole, the adjusting rod is a long round rod, the upper part of the adjusting rod has a thread that matches the central screw hole of the flange fixing seat, the front part of the adjusting rod is connected to the central screw hole of the flange fixing seat, the front end of the adjusting rod is connected to the handwheel, the rear end of the adjusting rod is opposite to the inner end face of the base, the outer sleeve of the adjusting rod is provided with a support rod sliding guide tube, the support rod sliding guide tube One end of the moving guide tube is connected to the inner plate surface of the disc of the flange fixing seat, and the other end of the support rod sliding guide tube is connected to the base. Four sliding grooves are evenly distributed on the circumference of the support rod sliding guide tube, and the sliding grooves are along the length direction of the support rod sliding guide tube. The pipeline support rod is a rectangular plate, and the thickness of the pipeline support rod matches the width of the sliding groove of the support rod sliding guide tube. Multiple pipeline support rods are respectively embedded in the sliding grooves of the support rod sliding guide tube. The lower part of the pipeline support rod is connected to the support rod sliding guide tube through a pin shaft. The lower end of the pipeline support rod is a semicircular arc gear, and racks are evenly distributed on the middle circumference of the adjustment rod along the length direction. The gear at the lower end of the pipeline support rod is meshed with the rack on the circumference of the adjustment rod.
[0006] The above-mentioned tool can assist in the concentric docking of the flange and the pipeline, and the circumference of the circular disc steel plate of the flange fixing seat is evenly distributed with four fixing slots, and the fixing slots are along the diameter of the flange fixing seat disc. Four flange fixing bolts are connected to the docking flange through the four fixing slots, and four fixing seat connecting plates are vertically welded on the inner plate surface of the flange fixing seat. The four fixing seat connecting plates are respectively located around the central screw hole of the flange fixing seat. The four fixing seat connecting plates are rectangular, and the thickness of the fixing seat connecting plates matches the width of the sliding slot of the support rod sliding guide tube. The four fixing seat connecting plates are respectively provided with rivet holes, and the rivets connect the fixing seat connecting plates to the support rod sliding guide tube through the rivet holes.
[0007] The above-mentioned tool can assist in the concentric docking of the flange and the pipeline. The front part of the rod body of the long round rod of the adjusting rod is a screw section, and the circumference of the screw section has a thread that matches the central screw hole of the flange fixing seat. The rear part of the rod body of the adjusting rod is a rack section, and the circumference of the rack section is evenly distributed with racks, which mesh with the gear at the lower end of the pipeline support rod. The front end of the adjusting rod has a square head, which is connected to the central square hole of the handwheel, and the front part of the square head has a fixing screw, and a nut is mounted on the fixing screw, and the nut fixes the handwheel to the square head.
[0008] The above-mentioned tool can assist in the concentric docking of the flange and the pipe, the base is a cylinder, and four base connecting plates are vertically welded on the inner end face of the base cylinder, the four base connecting plates are evenly distributed around the circumference of the base cylinder, the four base connecting plates are rectangular, the inner edges of the four base connecting plates are respectively opposite to the circumference of the lower end of the adjustment rod, the thickness of the base connecting plate matches the width of the sliding groove of the support rod sliding guide tube, and the four base connecting plates are respectively provided with rivet holes, and the rivets connect the base connecting plates with the support rod sliding guide tube through the rivet holes.
[0009] The above-mentioned tool that can assist the concentric connection between the flange and the pipeline, the support rod sliding guide tube is a split structure, the support rod sliding guide tube is composed of four pieces of special-shaped angle steels, the right-angle connection of the special-shaped angle steels is arc-shaped, the four pieces of special-shaped angle steels are opposite to each other, and the arcs at the right angles of the four pieces of special-shaped angle steels are opposite to each other to form a cylindrical body, the cylindrical body is sleeved on the outer periphery of the adjusting pull rod, and there is a gap between the opposite plate surfaces on both sides of the four pieces of special-shaped angle steels, and the gap is the sliding groove of the support rod sliding guide tube, and there are rivet holes at both ends of the plate surfaces on both sides of the four pieces of special-shaped angle steels, and the two ends of the plate surfaces of the two opposite pieces of special-shaped angle steels are respectively clamped on both sides of the fixed seat connecting plate of the flange fixing seat and the base connecting plate of the base, and the rivets are respectively fixed to the special-shaped angle steel and the fixed seat connecting plate and the base connecting plate through the rivet holes, and there are opposite pin shaft holes on the two side plate surfaces of the four pieces of special-shaped angle steels, and the lower part of the pipeline support rod is connected to the two side plate surfaces of the special-shaped angle steel of the support rod sliding guide tube through pin shafts.
[0010] The beneficial effects of the utility model are:
[0011] The flange fixing seat of the utility model can be connected to the flange by means of flange fixing bolts, so that the flange and the flange fixing seat are concentric; the adjusting rod and the support rod sliding guide tube are respectively concentric with the flange fixing seat, that is, they are concentric with the connected flange; the adjusting rod and the support rod sliding guide tube are placed in the pipeline, and the hand wheel is turned to rotate the adjusting rod, and the rack of the adjusting rod can drive the pipeline support rod to rotate and spread outward, so that the adjusting rod and the support rod sliding guide tube are located at the axial center position of the pipeline, and then the center of the flange fixing seat is concentric with the pipeline axis, so that the flange and the pipeline can remain concentric, and the flange surface remains parallel to the pipeline cross section, which is convenient for subsequent welding.
[0012] The utility model has a simple structure and is easy to use. The flange and the pipeline can be kept concentric, the flange plane is parallel and aligned with the pipeline cross section, and can adapt to various types of pipe diameters, thereby improving work efficiency, reducing the labor intensity of workers, and ensuring the safe and smooth completion of emergency repair construction. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of the utility model;
[0014] Figure 2 It is the front view of the flange fixing seat;
[0015] Figure 3 yes Figure 2 Side view of
[0016] Figure 4 It is a schematic diagram of the structure of the adjustment rod;
[0017] Figure 5 It is the front view of the base;
[0018] Figure 6 yes Figure 5 Side view of
[0019] Figure 7 is a schematic diagram of the structure of the strut sliding catheter;
[0020] Figure 8 yes Figure 7 Side view of
[0021] Fig. 9 It is a schematic diagram of the use state of the utility model.
[0022] The markings in the figure are as follows: flange fixing seat 1, adjustment rod 2, base 3, support rod sliding guide tube 4, pipe support rod 5, flange fixing bolt 6, handwheel 7, center screw hole 8, sliding groove 9, pin shaft 10, gear 11, rack 12, fixing slot hole 13, fixing seat connecting plate 14, rivet 15, screw segment 16, rack segment 17, square head 18, fixing screw 19, nut 20, special-shaped angle steel 21, rivet hole 22, pin shaft hole 23, base connecting plate 24. DETAILED DESCRIPTION
[0023] The utility model comprises a flange fixing seat 1, an adjusting pull rod 2, a base 3, a support rod sliding guide tube 4, a pipeline support rod 5, a flange fixing bolt 6 and a hand wheel 7.
[0024] Figure 1 , 9It is shown that the overall structure of the utility model is: the flange fixing seat 1 is fixedly connected to the docking flange through the flange fixing bolts 6, and the center of the flange fixing seat 1 is concentric with the center of the docking flange. One end of the adjustment rod 2 is connected to the central screw hole 8 of the flange fixing seat 1, and the other end of the adjustment rod 2 is opposite to the center of the base 3, and the adjustment rod 2 can move along the central screw hole 8 of the flange fixing seat 1. A support rod sliding guide tube 4 is sleeved on the outer periphery of the adjustment rod 2, and the two ends of the support rod sliding guide tube 4 are respectively connected to the flange fixing seat 1 and the base 3. There are four sliding grooves 9 along the length direction of the conduit on the support rod sliding conduit 4, and two pipe support rods 5 are placed in each sliding groove 9. The lower part of the pipe support rod 5 is connected to the side wall of the sliding groove 9 through a pin shaft 10. The lower end of the pipe support rod 5 has a gear 11 that meshes with the rack 12 on the circumference of the adjustment rod 2. When the adjustment rod 2 moves, the rack 12 will drive the pipe support rod 5 to rotate through the gear 11. After the pipe support rod 5 opens outward, the front end presses against the inner wall of the docking pipe, pushing the docking pipe to move to a position concentric with the docking flange.
[0025] Figure 1 , 2 3 shows that the flange fixing seat 1 is a disc steel plate, and four fixing slots 13 are evenly distributed on the circumference of the disc steel plate of the flange fixing seat 1. The fixing slots 13 are along the diameter of the disc of the flange fixing seat 1. Four flange fixing bolts 6 are connected to the docking flange through the four fixing slots 13. The disc of the flange fixing seat 1 has a central screw hole 10, and the front part of the adjustment rod 2 is connected to the central screw hole 10 of the flange fixing seat 1.
[0026] Figure 1 , 2 3 shows that four fixing seat connecting plates 14 are vertically welded to the inner side plate surface of the flange fixing seat 1, and the four fixing seat connecting plates 14 are respectively located around the central screw hole 10 of the flange fixing seat 1. The four fixing seat connecting plates 14 are rectangular, and the thickness of the fixing seat connecting plates 14 matches the width of the sliding groove 9 of the strut sliding guide tube 4. The four fixing seat connecting plates 14 are respectively provided with rivet holes 22, and the rivets 15 connect the fixing seat connecting plates 14 to the strut sliding guide tube 4 through the rivet holes 22.
[0027] Figure 1 , 4It is shown that the adjusting rod 2 is a long round rod, and the front part of the rod body of the adjusting rod 2 is a screw section 16. The circumference of the screw section 16 has threads that match the central screw hole 10 of the flange fixing seat 1. The screw section 16 of the adjusting rod 2 is screwed into the central screw hole 10 of the flange fixing seat 1. The rear part of the rod body of the adjusting rod 2 is a rack section 17. The circumference of the rack section 17 is evenly distributed with racks 12. The rack 12 is meshed with the gear 11 at the lower end of the pipe support rod 5. The rack 12 can drive the gear 11 to rotate, so as to open or close the pipe support rod 5. The front end of the adjusting rod 2 has a square head 18, which is connected to the central square hole of the hand wheel 7. The front part of the square head 18 has a fixed screw 19, and the fixed screw 19 is provided with a nut 20. The nut 20 fixes the hand wheel 7 and the square head 18. Turn the hand wheel 7, and the hand wheel 7 can drive the adjusting rod 2 to rotate through the square head 18.
[0028] Figure 1 , 5 6 shows that the base 3 is a cylinder, and four base connecting plates 24 are vertically welded on the inner end surface of the cylinder of the base 3. The four base connecting plates 24 are evenly distributed around the circumference of the cylinder of the base 3. The four base connecting plates 24 are rectangular. The inner edges of the four base connecting plates 24 are respectively opposite to the circumference of the lower end of the adjustment rod 2 at the outer periphery of the adjustment rod 2. The thickness of the base connecting plate 24 matches the width of the sliding groove 9 of the support rod sliding guide tube 4. The four base connecting plates 24 are respectively provided with rivet holes 22, and the rivets 15 connect the base connecting plates 24 with the support rod sliding guide tube 4 through the rivets 22.
[0029] Figure 1 , 7 8 shows that the strut sliding guide tube 4 is a split structure, which is composed of four pieces of special-shaped angle steels 21. The right-angle connection of the special-shaped angle steels 21 is arc-shaped. The four special-shaped angle steels 21 are opposite to each other in pairs, and the arcs at the right angles of the four special-shaped angle steels 21 are opposite to each other to form a cylindrical body. The cylindrical body is mounted on the outer periphery of the adjustment rod 2. There is a gap between the two sides of the four special-shaped angles 21 relative to the plate surfaces, and the gap is the sliding groove 9 of the strut sliding guide tube 4. The width of the gap is equal to the thickness of the pipe strut 5, and the pipe strut 5 can rotate in the sliding groove 9.
[0030] Figure 1 , 7 8 shows that the two ends of the two side plate surfaces of the four special-shaped angle steels 21 are respectively provided with rivet holes 22, and the two ends of the plate surfaces of the two opposite special-shaped angle steels 21 are respectively clamped on both sides of the fixing seat connecting plate 12 of the flange fixing seat 1 and the base connecting plate 24 of the base 3, and the rivets 15 respectively fix the special-shaped angle steels 21 to the fixing seat connecting plate 12 and the base connecting plate 24 through the rivet holes 22.
[0031] Figure 1 , 78 shows that there are two opposite pin holes 23 in the middle of the two side plates of the four special-shaped angle steels 21, and there are two pipe struts 5 in the sliding groove 9 formed by the two opposite plate surfaces of the special-shaped angle steels 21. The lower parts of the two pipe struts 5 have axial holes that are opposite to the pin holes 23 of the plate surface of the special-shaped angle steel 21. The pins 10 connect the lower parts of the two pipe struts 5 with the two side plates of the special-shaped angle steel 21 of the strut sliding guide tube 4, and the pipe struts 5 can rotate around the pins 10.
[0032] Figure 1 , 9 It is shown that the use process of the utility model is as follows:
[0033] First, assemble the flange fixing seat 1, the adjustment rod 2, the base 3, the support rod sliding guide tube 4, the pipe support rod 5, and the hand wheel 7 into a whole, turn the hand wheel 7 counterclockwise, the adjustment rod 2 moves in the support rod sliding guide tube 4 toward the flange fixing seat 1, the rack 12 of the adjustment rod 2 drives the gear 11 at the lower end of the pipe support rod 5 in the four sliding grooves 9 to rotate counterclockwise, the pipe support rod 5 rotates counterclockwise around the pin 10, and the rod body of the pipe support rod 5 is embedded in the sliding groove 9 of the support rod sliding guide tube 4;
[0034] Then, place the flange fixing seat 1 on the outside of the mating flange, and connect it to the mating flange through the four fixing slots 13 of the flange fixing seat 1 with four flange fixing bolts 6, so that the center of the flange fixing seat 1 is concentrically opposite to the center of the mating flange;
[0035] Next, the base 3 and the support rod sliding guide tube 4 are inserted into the docking pipe along the pipe opening of the docking pipe;
[0036] Finally, turn the hand wheel 7 clockwise to adjust the pull rod 2 to move in the support rod sliding guide tube 4 toward the base 3, and the rack 12 of the adjustment pull rod 2 drives the gear 11 at the lower end of the pipe support rod 5 to rotate clockwise, and the pipe support rod 5 rotates clockwise around the pin 10, and the upper ends of the rod bodies of the eight pipe support rods 5 in the four sliding grooves 9 of the support rod sliding guide tube 4 are respectively opened outward and pressed against the circumferential inner wall of the docking pipe;
[0037] If the central axis of the base 3 and the support rod sliding conduit 4 is not concentric with the central axis of the docking pipe, then there is a difference in the supporting force between the pipe support rods 5 in the four sliding grooves 9 and the inner wall of the docking pipe, which will cause the docking pipe to move to the side where the pipe support rods 5 do not contact the docking pipe, and finally the ends of the pipe support rods 5 in the four sliding grooves 9 are equally tight against the docking pipe, and the hand wheel 7 can no longer rotate, so that the central axis of the base 3 and the support rod sliding conduit 4 is concentric with the central axis of the docking pipe, thereby achieving the concentricity of the flange fixing seat 1 and the docking flange with the docking pipe;
[0038] If the inner diameter of the butt flange is smaller than the inner diameter of the butt pipe, welding can be done directly on the contact surface; if the inner diameter of the butt flange is larger than the outer diameter of the butt pipe, other materials can be used to fill the gap for repair welding without having to consider issues such as the up, down, left, and right butt flange offsets.
[0039] After welding is completed, rotate the hand wheel 7 counterclockwise to retract the rod body of the pipe support rod 5 into the sliding groove 9 of the support rod sliding guide tube 4, remove the four flange fixing bolts 6, separate the flange fixing seat 1 from the docking flange, pull out the docking tool, and complete the docking operation of the docking flange and the docking pipe.
[0040] An embodiment of the present utility model is as follows:
[0041] The outer diameter of the flange fixing seat 1 is 340mm, the thickness is 20mm, the depth of the central screw hole 8 is 20mm, and the M20 x 2.5 thread is adopted. The length of the fixing slot hole 13 is 125mm, the width is 17mm, and the length of the fixing seat connecting plate 14 is 30mm, the width is 15mm, and the thickness is 10mm;
[0042] The adjusting rod 2 is made of 60Si2Mn spring steel with a tempered Rockwell hardness of HRC45, with a diameter of 20mm and a length of 427mm. The length of the screw segment 16 is 100mm, the thread is M20 x 2.5, the length of the rack segment 17 is 220mm, the modulus is 1.5, the side length of the square head 18 is 12mm, the diameter of the fixing screw 19 is 12mm, the thread is M12 x 1.75, and the length is 15mm.
[0043] The base 3 has a diameter of 50 mm and a thickness of 20 mm, and the base connecting plate 24 has a length of 30 mm, a width of 15 mm and a thickness of 10 mm;
[0044] The length of the support rod sliding guide tube 4 is 310mm, the outer diameter is 50mm, the diameter of the middle cylinder of the special-shaped angle steel 21 with a thickness of 3mm is R20mm, the outer arc R26.5mm, and the width of the sliding groove 9 is 10mm;
[0045] The pipe support rod 5 is made of 60Si2Mn spring steel with a tempered Rockwell hardness of HRC45, with a length of 112mm, a width of 9.8mm, a thickness of 9.8mm, a gear module of 1.5, a circumferential number of teeth of 14, a tooth top circle of 24mm, 9 teeth are left in the processing of the parts, a center pin hole of ∅5.1mm, and a round head end arc of R10mm;
[0046] The diameter of the flange fixing bolt 6 is an M16 through-bolt and the length is 100 mm;
[0047] The diameter of the hand wheel 7 is 80 mm;
[0048] The pin 10 is made of GCr15 bearing steel with a tempered Rockwell hardness of HRC60 and a diameter of 5mm and a length of 20mm after polishing;
[0049] The diameter of the rivet 15 is 5 mm, the riveted thickness is 16 mm, and the total length after riveting is 20 mm.
Claims
1. A tool that can assist in concentrically docking a flange with a pipe, characterized in that: The utility model comprises a flange fixing seat (1), an adjusting rod (2), a base (3), a support rod sliding guide tube (4), a pipe support rod (5), a flange fixing bolt (6), and a hand wheel (7). The flange fixing seat (1) is a disc steel plate. The flange fixing seat (1) is connected to the docking flange through the flange fixing bolt (6). The disc of the flange fixing seat (1) has a central screw hole (8). The adjusting rod (2) is a long round rod. The front part of the adjusting rod (2) has a thread matching the central screw hole (8) of the flange fixing seat (1). The front part of the adjusting rod (2) is connected to the central screw hole (8) of the flange fixing seat (1). The front end of the adjusting rod (2) is connected to the hand wheel (7). The rear end of the adjusting rod (2) is opposite to the inner end surface of the base (3). The outside of the adjusting rod (2) is sleeved with a support rod sliding guide tube (4). One end of the support rod sliding guide tube (4) is connected to the flange fixing seat. The inner plate surface of the disc of the fixed seat (1) is connected, and the other end of the support rod sliding conduit (4) is connected to the base (3). The circumference of the support rod sliding conduit (4) is evenly distributed with four sliding grooves (9), and the sliding grooves (9) are along the length direction of the support rod sliding conduit (4). The pipeline support rod (5) is a rectangular plate. The thickness of the pipeline support rod (5) matches the width of the sliding groove (9) of the support rod sliding conduit (4). A plurality of pipeline support rods (5) are respectively embedded in the sliding grooves (9) of the support rod sliding conduit (4). The lower part of the pipeline support rod (5) is connected to the support rod sliding conduit (4) through a pin shaft (10). The lower end of the pipeline support rod (5) is a semicircular arc gear (11). The middle circumference of the adjustment rod (2) is evenly distributed with racks (12) along the length direction. The gear (11) at the lower end of the pipeline support rod (5) is meshed with the rack (12) on the circumference of the adjustment rod (2).
2. The tool capable of assisting the concentric connection between the flange and the pipeline according to claim 1, characterized in that: The circumference of the disc steel plate of the flange fixing seat (1) is evenly distributed with four fixing slots (13), the fixing slots (13) are long holes, and the fixing slots (13) are along the diameter of the disc of the flange fixing seat (1). Four flange fixing bolts (6) are connected to the docking flange through the four fixing slots (13). Four fixing seat connecting plates (14) are vertically welded to the inner plate surface of the flange fixing seat (1). The four fixing seat connecting plates (14) are respectively located around the central screw hole (8) of the flange fixing seat (1). The four fixing seat connecting plates (14) are rectangular, and the thickness of the fixing seat connecting plates (14) matches the width of the sliding groove (9) of the support rod sliding guide tube (4). The four fixing seat connecting plates (14) are respectively provided with rivet holes (22), and the rivets (15) connect the fixing seat connecting plates (14) to the support rod sliding guide tube (4) through the rivet holes (22).
3. The tool capable of assisting the concentric connection between the flange and the pipeline according to claim 1, characterized in that: The front part of the rod body of the long round rod of the adjusting rod (2) is a screw section (16), and the circumference of the screw section (16) is threaded to match the central screw hole (8) of the flange fixing seat (1). The rear part of the rod body of the adjusting rod (2) is a rack section (17), and the circumference of the rack section (17) is evenly distributed with racks (12), and the racks (12) are meshed with the gear (11) at the lower end of the pipe support rod (5). The front end of the adjusting rod (2) is provided with a square head (18), and the square head (18) is connected to the central square hole of the hand wheel (7). The front part of the square head (18) is provided with a fixing screw (19), and a nut (20) is mounted on the fixing screw (19), and the nut (20) fixes the hand wheel (7) and the square head (18).
4. The tool capable of assisting the concentric connection between the flange and the pipeline according to claim 1, characterized in that: The base (3) is a cylinder, and four base connecting plates (24) are vertically welded on the inner end surface of the cylinder of the base (3). The four base connecting plates (24) are evenly distributed around the circumference of the cylinder of the base (3). The four base connecting plates (24) are rectangular. The inner edges of the four base connecting plates (24) are respectively opposite to the circumference of the lower end of the adjustment rod (2). The thickness of the base connecting plates (24) matches the width of the sliding groove (9) of the support rod sliding guide tube (4). The four base connecting plates (24) are respectively provided with rivet holes (22), and the rivets (15) connect the base connecting plates (24) to the support rod sliding guide tube (4) through the rivet holes (22).
5. The tool capable of assisting the concentric connection between the flange and the pipeline according to claim 1, characterized in that: The support rod sliding guide tube (4) is a split structure. The support rod sliding guide tube (4) is composed of four pieces of special-shaped angle steel (21). The right-angle connection of the special-shaped angle steel (21) is arc-shaped. The four pieces of special-shaped angle steel (21) are opposite to each other in pairs. The right-angle arcs of the four pieces of special-shaped angle steel (21) are opposite to each other to form a cylindrical body. The cylindrical body is sleeved on the outer periphery of the adjustment rod (2). There is a gap between the two sides of the four pieces of special-shaped angle steel (21) The gap is the sliding groove (9) of the support rod sliding guide tube (4), and the two ends of the two side plates of the four pieces of special-shaped angle steel (21) are respectively provided with rivet holes (22). The two ends of the plate surfaces of the two pieces of special-shaped angle steel (21) are respectively clamped on the two sides of the fixing seat connecting plate (14) of the flange fixing seat (1) and the base connecting plate (24) of the base (3), and the rivets (15) respectively fix the special-shaped angle steel (21) with the fixing seat connecting plate (14) and the base connecting plate (24) through the rivet holes (22). The two side plate surfaces of the four pieces of special-shaped angle steel (21) are respectively provided with opposite pin holes (23), and the lower part of the pipeline support rod (5) is connected to the two side plate surfaces of the special-shaped angle steel (21) of the support rod sliding guide tube (4) through the pins (10).