Building pipe fixing and installing device

Abstract

The application relates to a building pipe fixing installation device which effectively solves the problem of pipe sliding and falling; the technical scheme is that two first arc-shaped plates are provided, the two first arc-shaped plates are semicircular, arc-shaped through grooves are formed in the splicing surfaces of each first arc-shaped plate, each arc-shaped through groove is internally provided with a second arc-shaped plate, a cylindrical block is fixed to the outer edge surface of each first arc-shaped plate, a round rod is inserted into each cylindrical block, the end of the round rod arranged on the inner side of the first arc-shaped plate is provided with a third arc-shaped plate, and each third arc-shaped plate is provided with a front and back movable stopper; the two first arc-shaped plates can be fixed together to form a cylinder and the third arc-shaped plate and the arc-shaped block can be moved inward by rotating the round rod; when the pipe is inclined, the front and back movement of the third arc-shaped plate can extrude the stopper on one side, the stopper can provide a reverse extrusion force to the third arc-shaped plate, and the holding force of the arc-shaped block to the pipe is increased.

Description

Technical Field

[0001] This invention relates to the field of pipe fixing, and in particular to a pipe fixing and installation device for buildings. Background Technology

[0002] In existing technologies, the hoisting method for building pipes, such as the patent application with publication number CN111792520A, involves placing one end of the pipe inside the lifting seat 41 and the rotating buckle 43. The rotating buckle 43 is then rotated to bring it closer to the lifting seat, forming a circular through hole. Under the elastic force of the spring 44, the first and second ratchet teeth engage and fix the pipe. Subsequently, the winch motor 27 drives the winch roller 21 to rotate, thereby rewinding the wire rope 23 around the outside of the winch roller 21, achieving the lifting and raising of the pipe. During the lifting process, a rubber friction pad 45 is used to increase the friction between the pipe and the lifting seat 41 and the rotating buckle 43, thus preventing the pipe from slipping and falling. Although this method achieves simple clamping and lifting, the following problems still exist:

[0003] 1. When installing pipes that need to be installed at an angle, the clamping is achieved by the interlocking of the first and second ratchet teeth. Since the pipe is usually horizontal during the initial hoisting, the first and second ratchet teeth only need to meet the clamping force required for the pipe in the horizontal state. When the pipe needs to be tilted, the clamping force required is greater because the pipe is usually heavier. The clamping force in the horizontal state is difficult to meet the clamping force required in the tilted state, which can easily lead to the danger of the pipe slipping and falling.

[0004] 2. When it is necessary to install and fix the flange at the end of the pipe, this clamping method cannot allow the pipe to rotate, resulting in the problem that the holes on the flange cannot be aligned. Summary of the Invention

[0005] In view of the above situation and to overcome the defects of the prior art, the present invention provides a building pipe fixing and installation device, which effectively solves the problem of pipe slippage and falling danger.

[0006] The technical solution is a building pipe fixing and installation device, including two first arc-shaped plates, both of which are semi-circular. Each first arc-shaped plate has an arc-shaped through groove on its splicing surface that extends to the other splicing surface. Each arc-shaped through groove contains a second arc-shaped plate. Each second arc-shaped plate can rotate around the axis of the first arc-shaped plate. When the second arc-shaped plate rotates, one end of it can move out of the arc-shaped through groove and be placed in the arc-shaped through groove on the corresponding side, and be fixed in the arc-shaped channel on the corresponding side, so that the two first arc-shaped plates are fixed together to form a cylinder.

[0007] A cylindrical block is fixed on the outer edge of each first arc plate. A cylindrical rod is threaded into each cylindrical block, and the inner end of the rod passes through the first arc plate. A third arc plate is installed at the end of the rod placed inside the first arc plate. The third arc plate moves inward and outward with the rod but does not rotate with the rod. The third arc plate can move back and forth and inward and outward at the end of the rod. There is a stop block at each of the front and rear ends of each third arc plate that can move inward and outward. The front and rear ends of the third arc plate are always in contact with the corresponding stop blocks. When the third arc plate moves back and forth, it can squeeze the stop block on the corresponding side, so that the stop block moves outward and is fixed. At the same time, after the stop block is fixed, it can give the third arc plate an inward force.

[0008] When the round rod rotates, it drives the second arc-shaped plate to rotate within the arc-shaped through groove.

[0009] This invention uses a rotating rod to fix two first arc-shaped plates together to form a cylinder, and to move the third arc-shaped plate and the arc-shaped block inward to fix the pipe. When the pipe tilts, the forward and backward movement of the third arc-shaped plate can press against the stop block on one side, and the stop block can exert a reverse pressing force on the third arc-shaped plate, increasing the clamping force exerted by the arc-shaped block on the pipe and preventing slippage between the arc-shaped block and the pipe. Attached Figure Description

[0010] Figure 1 This is the front view of the present invention.

[0011] Figure 2 This is a front sectional view of the present invention.

[0012] Figure 3 This is a front view of the present invention with the first arc-shaped plate on the right side removed and the second arc-shaped plate placed in the through groove.

[0013] Figure 4 For the present invention Figure 3 Main sectional view.

[0014] Figure 5 For the present invention Figure 4 Enlarged view of point A.

[0015] Figure 6 For the present invention Figure 3 Front sectional view through the axis of the rectangular rod.

[0016] Figure 7 For the present invention Figure 3 The left view.

[0017] Figure 8 For the present invention Figure 3 Top sectional view.

[0018] Figure 9 For the present invention Figure 8Top sectional view of the first arc-shaped plate and cylindrical block.

[0019] Figure 10 This is a perspective view of the first arc-shaped plate and cylindrical block of the present invention.

[0020] Figure 11 This is a perspective view of the first arc-shaped plate of the present invention.

[0021] Figure 12 This is a perspective view of the second arc-shaped plate of the present invention.

[0022] Figure 13 This is a perspective view of the cooperation between the third arc-shaped plate and the stop block of the present invention.

[0023] Figure 14 This is a cross-sectional perspective view of the third arc-shaped plate of the present invention.

[0024] Figure 15 This is an enlarged perspective view of the stepped shaft and slider of the present invention.

[0025] Figure 16 This is a perspective view of the arc-shaped block of the present invention.

[0026] Figure 17 This is a front view of the connection state between the U-shaped plate and the first arc plate of the present invention.

[0027] Figure 18 This is a left-side view of the pipe hoisting process after removing the left end face of the U-shaped plate according to the present invention. Detailed Implementation

[0028] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] Depend on Figures 1 to 18 The present invention includes two first arc-shaped plates 1, both of which are semi-circular. Each first arc-shaped plate 1 has an arc-shaped through groove 2 extending to the other arc-shaped plate on its splicing surface. Each arc-shaped through groove 2 contains a second arc-shaped plate 3. Each second arc-shaped plate 3 can rotate around the axis of the first arc-shaped plate 1. When the second arc-shaped plate 3 rotates, one end of it can move out of the arc-shaped through groove 2 and be placed in the arc-shaped through groove 2 on the corresponding side, and be fixed in the arc-shaped channel 2 on the corresponding side, so that the two first arc-shaped plates 1 are fixed together to form a cylinder.

[0030] A cylindrical block 8 is fixed on the outer edge of each first arc plate 3. A round rod 4 is threaded into each cylindrical block 8. The inner end of the round rod 4 passes through the first arc plate 1. A third arc plate 5 is installed at the end of the round rod 4 located inside the first arc plate 1. The third arc plate 5 moves inward and outward with the round rod 4 but does not rotate with the round rod 4. The third arc plate 5 can move back and forth and inward and outward at the end of the round rod 4. There is a stop block 7 at each of the front and rear ends of each third arc plate 5 that can move inward and outward. The front and rear ends of the third arc plate 5 are always in contact with the corresponding stop block 7. When the third arc plate 5 moves back and forth, it can squeeze the stop block 7 on the corresponding side, so that the stop block 7 moves outward and is fixed. At the same time, after the stop block 7 is fixed, it can give the third arc plate 5 an inward force.

[0031] When the round rod 4 rotates, it drives the second arc-shaped plate 3 to rotate within the arc-shaped through groove 2.

[0032] The second arc-shaped plate 3 has a relief groove 9 that passes through the second arc-shaped plate 3. The relief groove 9 is arranged around the circumference of the second arc-shaped plate 3. The end face of the relief groove 9 has a toothed rack, and the round rod 4 passes through the relief groove 9.

[0033] A countersunk groove is formed at the right end of the outer edge of the round rod 4, and the countersunk groove is set along the axial direction of the round rod 4. A gear 10 is mounted on the round rod 4, and the gear 10 is located in the relief groove 9. The gear 10 can mesh with the rack in the relief groove 9. The gear 10 is rotatably mounted on the round rod 4 and can move axially on the round rod 4. A countersunk hole is formed on the inner edge of the gear 10, and a round-headed pin is installed in the countersunk hole. A spring is installed at the bottom of the countersunk hole. The spring gives the round-headed pin an outward force so that the round-headed pin can be placed in the countersunk groove. The rotation of the round rod 4 drives the gear 10 to rotate through the countersunk groove and the round-headed pin, and then drives the second arc plate 3 to rotate.

[0034] Each of the second arc-shaped plates 3 has a limiting hole 11 at its end extending from the arc-shaped through groove 2. A through hole is formed on the outer edge of the corresponding first arc-shaped plate 1 into which the end of each second arc-shaped plate 3 is inserted. A pin 18 is inserted into the through hole, with one end of the pin 18 positioned outside the first arc-shaped plate 1. A spring is fitted onto the pin 18, with one end fixed to the pin 18 and the other end fixed to the first arc-shaped plate 1. The spring provides a force to the pin 18 to move into the arc-shaped through groove 2. Both the pin 18 and the limiting hole 11 are located on the extension line of the centerline of the relief groove 9. The diameter of the pin 18 is larger than the width of the relief groove 9. When the end of the second arc-shaped plate 3 is inserted into the corresponding first arc-shaped through groove 2... When the pin 18 is inserted into the arc-shaped through groove 2 on plate 1, the pin 18 is inserted into the corresponding limiting hole 11. The two sets of limiting holes 11 and the pin 18 fix the two first arc-shaped plates 1 together to form a cylinder. Since the diameter of the pin 18 is greater than the width of the relief groove 9, the pin 18 will not be inserted into the relief groove 19. When the second arc-shaped plate 3 is not rotating, the inner end of the pin 18 is in contact with the second arc-shaped plate 3, so that the spring on the pin 18 is in a compressed state. When the second arc-shaped plate 2 rotates, the inner end of the pin 18 will always be in contact with the second arc-shaped plate 3, so that the spring on the pin 18 is always in a compressed state, in preparation for insertion into the limiting hole 11 on the corresponding side of the second arc-shaped plate 2.

[0035] One of the first arc-shaped plates 1 has a protrusion 20 fixed on one splicing surface and a countersunk hole on the other splicing surface. The other first arc-shaped plate 1 also has a protrusion 20 and a countersunk hole corresponding to the first arc-shaped plate 1. When the two first arc-shaped plates 1 are closed, the protrusion 20 is inserted into the countersunk hole on the corresponding side, so that the two first arc-shaped plates 1 are initially closed.

[0036] The inner end of the round rod 4 is provided with a stepped hole, and a stepped shaft 12 is installed in the stepped hole. The stepped shaft 12 rotates at the end of the round rod 4 and does not detach from the round rod 4. One end of the stepped shaft 12 extends out of the round rod 4, and a slider 13 with a trapezoidal cross section is fixed at the end of the stepped shaft 12 extending out of the round rod 4.

[0037] A trapezoidal groove is provided in the middle of the outer edge of the third arc plate 5. The trapezoidal groove is arranged in front and behind. The slider 13 is placed in the trapezoidal groove. The size of the trapezoidal groove is larger than that of the slider 13, so that the third arc plate 5 can move back and forth at the end of the round rod 4, and can also move inward and outward at the end of the round rod 4.

[0038] The front and rear ends of the third arc plate 5 are inclined outwards, and the adjacent surfaces of the two blocks 7 are inclined inwards. The third arc plate 5 and the blocks 7 are always in contact through the inclined surfaces.

[0039] Each stop block 7 has a rectangular rod 14 with a rectangular cross-section fixed to its outer end. The outer end of each rectangular rod 14 passes through the first arc plate 1 and the cylindrical block 8 and is placed at the outer end of the cylindrical block 8. The rectangular rod 14 prevents the stop block 7 from rotating. A compression spring is fitted on the rectangular rod 14. The compression spring is located between the inner edge surface of the first arc plate 1 and the outer edge surface of the stop block 7. The compression spring gives the stop block 7 an inward force.

[0040] The outer end of the rectangular rod 14 has multiple serrated grooves 15; the cylindrical block 8 is fitted with a stop bar 16, the inner end of the stop bar 16 is a slope, and the slope of the stop bar 16 can be placed in the serrated groove 15.

[0041] When the inclined surface of the stop bar 16 is placed in the serrated groove 15, the rectangular bar 14 can move inward, and under the action of the compression spring, the stop block 7 is always in contact with the inclined surface at the end of the third arc plate 5, but the rectangular bar 14 cannot move outward to fix the rectangular bar 14.

[0042] The outer end of the stop rod 16 is located outside the cylindrical block 8. A spring is fitted on the stop rod 16. One end of the spring is fixed to the cylindrical block 8, and the other end of the spring is fixed to the stop rod 16. The spring causes the stop rod 16 to have a force that moves it toward the rectangular rod 14.

[0043] The outer ends of the two stop bars 16 on the cylindrical block 8 are fixed together by a crossbar;

[0044] Two clearance slots 17 are provided on the second arc plate 3. The rectangular rod 14 passes through the slots 17. When the second arc plate 3 rotates, the rectangular rod 14 does not interfere with the clearance slots 17.

[0045] Each of the third arc-shaped plates 5 has an arc-shaped block 6 on its inner edge. The arc-shaped block 6 rotates around the axis of the third arc-shaped plate 5 on the third arc-shaped plate 5 and does not detach from the third arc-shaped plate 5.

[0046] The inner edge of the third arc plate 5 is provided with a trapezoidal groove, which is arranged along the circumference of the third arc plate 5. The outer edge of the arc block 6 is provided with a trapezoidal block 19, which slides in the trapezoidal groove. There is friction between the trapezoidal block 19 and the trapezoidal groove.

[0047] The inner edge of the arc-shaped block 6 is fixed with a rubber layer;

[0048] Due to the presence of friction, the arc-shaped block 6 will not easily slide on the third arc-shaped plate 5, ensuring that the arc-shaped block 6 is placed in the middle of the third arc-shaped plate 5 when fixing the pipe.

[0049] The present invention also includes a U-shaped plate 22 with the opening facing downward. The U-shaped plate 22 contains two rotating rods 23 with their axes placed horizontally. The two rotating rods 23 are arranged vertically. A reversing wheel 24 is fixed on the lower rotating rod 23, and a pressure wheel 25 is mounted on the upper rotating rod.

[0050] The cylindrical block 8 is equipped with a rotating wheel 21 on its outer edge, and the rotating wheel 21 rotates on the cylindrical block 8;

[0051] There is a pull rope 26 between the reversing wheel 24 and the pressure wheel 25. The two ends of the pull rope 26 are located on the front and rear sides of the reversing wheel 24. Each end of the pull rope 26 has two branches. Each branch is fixed to one of the rotating wheels 21 in each cylinder. The pressure wheel 25 always squeezes the pull rope 26.

[0052] A motor 27 is fixed to the left end face of the U-shaped plate 22, and the motor 27 drives the reversing wheel 24 to rotate.

[0053] A hook is fixed to the upper end of the U-shaped plate 22.

[0054] Now Figure 17 The process of pipe hoisting is illustrated using the pipe hoisting direction shown in the image as an example. Figure 17 In the middle, the pipes are placed at the front and back.

[0055] Before using this invention, the round rod 4 on each first arc plate 1 is rotated to the outermost displacement, so that the round pin on the gear 10 is placed in the groove on the round rod 4, the second arc plate 3 is placed in the arc-shaped through groove 2 of the first arc plate 1, the inner end of the pin 18 is in contact with the second arc plate 3, and the arc block 6 is placed in the middle of the trapezoidal slide.

[0056] When using this invention, four first arc-shaped plates 1 are required. Every two first arc-shaped plates 1 form a cylinder. The two first arc-shaped plates 1 forming a cylinder are arranged circumferentially about the axis. Then, the two sets of first arc-shaped plates 1 are placed on the outer edge of one end of the pipe to be hoisted, and the first arc-shaped plates 1 are a certain distance away from the end of the pipe to be hoisted. Then, the two first arc-shaped plates 1 are fastened together, so that the protrusion 20 on one of the first arc-shaped plates 1 is placed in the countersunk hole on the other first arc-shaped plate 1, so that the two first arc-shaped plates 1 are initially closed together. In this state, the end faces of the two second arc-shaped plates 3 are also attached together to form a ring.

[0057] Then, two round rods 4 in each group are screwed on simultaneously. In the initial state, the round head pin on the gear 10 is placed in the groove on the round rod 4. When the round rod 4 rotates, the round rod 4 drives the round head pin through the groove to make the gear 10 rotate. The gear 10 causes the second arc plate 3 to rotate through the rack in the relief groove 9 and move out of the arc through groove 2. Then it is placed in the arc through groove 2 on another first arc plate 1. When the limiting hole 11 on the second arc plate 3 moves to the inside of the pin 18 on the other first arc plate 1, the pin 18 moves into the limiting hole 11 under the action of the spring, so that the two second arc plates 3 stop rotating. The two second arc plates 3 are fixed together with the first arc plate 1 on the corresponding side, so that the two first arc plates 1 are also fixed together.

[0058] As the round rod 4 continues to rotate, since the second arc plate 3 is fixed, the round rod 4 cannot continue to drive the gear 10 to rotate. The round rod 4 will apply a squeezing force to the round head pin, causing the round head pin to compress the spring and the round head pin to disengage from the groove. The round rod 4 can then continue to rotate. During the process of fixing the two first arc plates 1, the round rod 4 drives the third arc plate 5 and the arc block 6 to move inward.

[0059] After the two first arc plates 1 are fixed, the round rod 4 continues to rotate. Under the action of the thread, the round rod 4 continues to move the third arc plate 5 inward. When the third arc plate 5 moves inward, the arc block 6 contacts the pipe to be hoisted. Under the continuous inward rotation of the round rod 4, the arc block 6 finally presses the pipe tightly. Then the rotation of the round rod 4 stops. The round rod 4 cannot move inward or outward due to the obstruction of the thread.

[0060] When the third arc plate 5 moves inward, the stop block 7 moves inward under the action of the spring. Therefore, the two stop blocks 7 will always move inward simultaneously with the third arc plate 5 in a state of contact. Since the stop block 7 cannot rotate, the third arc plate 5 will not rotate with the rotation of the round rod 4, so that the third arc plate 5 always moves inward along the axis of the round rod 4.

[0061] Then, in the same way, the two first arc-shaped plates 1 of the other group are installed and fixed to the other end of the pipe.

[0062] After the arc block 6 clamps the pipe, there are gaps between the outside of the slider 13 placed at the end of the round rod 4 and the trapezoidal groove on the third arc plate 5, as well as between the front and rear ends of the slider 13 and the trapezoidal groove. These gaps allow the third arc plate 5 to move inward and backward, preparing it for subsequent operations.

[0063] Meanwhile, since the pipes have different diameters, after the arc block 6 clamps the pipes, the end bevel of the stop bar 16 will have two possible engagements with the serrated groove 15: either the end bevel of the stop bar 16 will be fully engaged with the serrated groove 15, or the end bevel of the stop bar 16 will not be fully engaged with the serrated groove 15.

[0064] When pipe installation is required, use a tower crane or crane to lift the hook on the U-shaped plate 22, then move it to the installation position. Start the motor 27 to rotate according to the installation angle. The motor 27 causes the pull rope 26 to be pulled up at one end and down at the other end via the reversing wheel 24. When the angle is reached, install the pipe.

[0065] When the pipe is tilted, due to the gap between the front and rear ends of the slider 13 and the trapezoidal groove, the pipe will move forward or backward on the third arc plate 5 via the arc block 6 and press the stop block 7 through the inclined surface, so that the stop block 7 has an outward force. If the inclined surface of the end of the stop rod 16 is fully engaged with the sawtooth groove 15 at this time, the stop block 7 cannot move outward. At the same time, the stop block 7 will give the third arc plate 5 an inward force through the inclined surface, which will cause the arc block 6 to further clamp the pipe, so as to ensure that the arc block 6 gives the pipe a greater squeezing force when the pipe is tilted, so that the pipe does not separate from the arc block 6.

[0066] When the arc plate 6 drives the third arc plate 5 to exert an outward force on the stop block 7 via the inclined surface, if the inclined surface at the end of the stop block 16 is not fully engaged with the sawtooth groove 15 at this time, the stop block 7 will move outward a certain distance until the inclined surface at the end of the stop block 16 is fully engaged with the sawtooth groove 15, so that the stop block 7 is fixed. At the same time, the stop block 7 exerts an inward force on the third arc plate 5 via the inclined surface, so that the arc plate 6 further clamps the pipe.

[0067] As can be seen from the second case above, it is necessary to set the dimensions of the stop block 16, the serrated groove 15, the slider 13 and the trapezoidal slide. When the outer end inclined surface of the stop block 16 is not fully engaged with the serrated groove 15, the back-and-forth movement of the third arc plate 5 can make the stop block 7 move outward so that the outer end inclined surface of the stop block 16 is fully engaged with the serrated groove 15, so that the stop block 7 can be fixed and cannot continue to move outward. At the same time, the fixed stop block 7 can make the third arc plate 5 move inward.

[0068] During pipe installation, the pipe needs to be rotated and adjusted, such as when the flange holes need to be aligned. Since there is a certain distance between the first arc plate 1 and the end of the pipe during installation, the pipe can be rotated manually, which will push the arc block 6 to slide along the trapezoidal groove, causing the pipe to rotate and align the holes. This eliminates the need to open the two first arc plates 1 for pipe adjustment and prevents the pipe from falling off.

[0069] After installation, first pull out the pin 18 and the stop rod 16, so that the pin 18 is pulled out from the limiting hole 11 on the second arc plate 3, so that the end bevel of the stop rod 16 is disengaged from the serrated groove 15, and fix the pin 18 and the stop rod 16. The fixing method can be a block or the like. Then rotate the round rod 4 in the opposite direction. The round rod 4 drives the third arc plate 5 and the stop block 7 to move outward, so that the arc block 6 is disengaged from the pipe. At the same time, when the round rod 4 rotates, the round head pin on the gear 10 causes the gear 10 and the rack in the relief groove 9 to drive the second arc plate 3 to move, so that one end of the second arc plate 3 moves out of the corresponding side arc through groove 2, so that the two first arc plates 1 are separated. When the round rod 4 drives the third arc plate 5 to move outward, the third arc plate 5 pushes the stop block 7 outward against the spring through the bevel.

[0070] 1. By rotating the round rod 4, the two first arc plates 1 can be fixed together to form a cylinder, and the third arc plate 5 and the arc block 6 can be moved inward to fix the pipe. When the pipe is tilted, the back and forth movement of the third arc plate 5 can squeeze the stop block 7 on one side, and the stop block 7 can give the third arc plate 5 a reverse squeezing force, which increases the clamping force applied to the pipe by the arc block 6 and prevents the arc block 6 and the pipe from sliding.

[0071] 2. When the third arc-shaped plate 5 of the present invention moves inward, regardless of the distance it moves, the stop block 7 can move inward with the third arc-shaped plate 5 at the same time, so that the third arc-shaped plate 5 and the stop blocks 7 on the front and rear sides are always in a state of inclined contact, which can adapt to pipes of different diameters.

[0072] 3. When installing flange-type pipes, since the arc block 6 can rotate on the third arc plate 5, the pipe can be rotated manually, which will push the arc block 6 to slide along the trapezoidal groove, causing the pipe to rotate and align the pipe to be installed. There is no need to open the two first arc plates 1 to adjust the pipe, which is convenient and efficient.

[0073] 4. The present invention can clamp and fix the pipe by simply rotating the round rod 4, and can also separate the two first arc plates 1 by pulling out the pin 18 and the stop rod 16 and rotating the round rod 4 in the opposite direction. The operation is simple and convenient.

Claims

1. A building pipe fixing and installation device, characterized in that, It includes two first arc plates (1), both of which are semi-circular. Each first arc plate (1) has an arc-shaped through groove (2) that extends to the other splicing surface. Each arc-shaped through groove (2) contains a second arc plate (3). Each second arc plate (3) can rotate around the axis of the first arc plate (1). When the second arc plate (3) rotates, one end of it can move out of the arc-shaped through groove (2) and be placed in the arc-shaped through groove (2) on the corresponding side, and be fixed in the arc-shaped through groove (2) on the corresponding side, so that the two first arc plates (1) are fixed together to form a cylinder. A cylindrical block (8) is fixed on the outer edge of each first arc plate (1). A round rod (4) is threaded into each cylindrical block (8). The inner end of the round rod (4) passes through the first arc plate (1). A third arc plate (5) is installed at the end of the round rod (4) placed inside the first arc plate (1). The third arc plate (5) moves inward and outward with the round rod (4) but does not rotate with the round rod (4). The third arc plate (5) can move back and forth and inward and outward at the end of the round rod (4). Each third arc plate (5) has a stop block (7) that can move inward and outward at both ends. The front and rear ends of the third arc plate (5) are always in contact with the corresponding stop block (7). When the third arc plate (5) moves back and forth, it can squeeze the stop block (7) on the corresponding side, so that the stop block (7) moves outward and is fixed. At the same time, after the stop block (7) is fixed, it can give the third arc plate (5) an inward force. When the round rod (4) rotates, it drives the second arc plate (3) to rotate within the arc-shaped through groove (2); The second arc plate (3) has a relief groove (9) that passes through the second arc plate (3). The relief groove (9) is arranged around the circumference of the second arc plate (3). The end face of the relief groove (9) has a rack, and the round rod (4) passes through the relief groove (9). A countersunk groove is opened at the right end of the outer edge of the round rod (4), and the countersunk groove is set along the axial direction of the round rod (4); a gear (10) is mounted on the round rod (4), and the gear (10) is located in the relief groove (9). The gear (10) can mesh with the rack in the relief groove (9); the gear (10) is rotatably mounted on the round rod (4) and can move axially on the round rod (4). A countersunk hole is opened on the inner edge of the gear (10), and a round head pin is installed in the countersunk hole. A spring is installed at the bottom of the countersunk hole. The spring gives the round head pin an outward force so that the round head pin can be placed in the countersunk groove. The round rod (4) rotates and drives the gear (10) to rotate through the countersunk groove and the round head pin, which in turn drives the second arc plate (3) to rotate.

2. The building pipe fixing and installation device according to claim 1, characterized in that, Each of the second arc-shaped plates (3) has a limiting hole (11) at the end that extends out of the arc-shaped through groove (2). The outer edge of the first arc-shaped plate (1) on the corresponding side into which the end of each second arc-shaped plate (3) is inserted has a through hole. A pin (18) is inserted into the through hole. One end of the pin (18) is placed on the outside of the first arc-shaped plate (1). A spring is sleeved on the pin (18). One end of the spring is fixed on the pin (18), and the other end is fixed on the first arc-shaped plate (1). The spring gives the pin (18) a force to move into the arc-shaped through groove (2). The pin (18) and the limiting hole (11) are both placed on the extension line of the centerline of the relief groove (9). The diameter of the pin (18) is greater than the width of the relief groove (9).

3. The building pipe fixing and installation device according to claim 2, characterized in that, One of the first arc-shaped plates (1) has a protrusion (20) fixed on one splicing surface and a countersunk hole on the other splicing surface. The other first arc-shaped plate (1) also has a protrusion (20) and a countersunk hole corresponding to the first arc-shaped plate (1).

4. The building pipe fixing and installation device according to claim 1, characterized in that, The inner end of the round rod (4) is provided with a stepped hole, and a stepped shaft (12) is installed in the stepped hole. The stepped shaft (12) rotates at the end of the round rod (4) and does not separate from the round rod (4). One end of the stepped shaft (12) extends out of the round rod (4), and a slider (13) with a trapezoidal cross section is fixed at the end of the stepped shaft (12) extending out of the round rod (4). The third arc plate (5) has a trapezoidal groove in the middle of its outer edge. The trapezoidal groove is arranged in front and behind. The slider (13) is placed in the trapezoidal groove. The size of the trapezoidal groove is larger than that of the slider (13), so that the third arc plate (5) can move back and forth at the end of the round rod (4) and can also move inside and outside at the end of the round rod (4). The front and rear ends of the third arc plate (5) are inclined outwards, and the adjacent surfaces of the two blocks (7) are inclined inwards. The third arc plate (5) and the blocks (7) are always in contact through the inclined surfaces.

5. The building pipe fixing and installation device according to claim 4, characterized in that, Each stop (7) is fixed with a rectangular rod (14) with a rectangular cross-section at its outer end. The outer end of each rectangular rod (14) passes through the first arc plate (1) and the cylindrical block (8) and is placed at the outer end of the cylindrical block (8). The rectangular rod (14) prevents the stop (7) from rotating. A compression spring is fitted on the rectangular rod (14). The compression spring is located between the inner edge of the first arc plate (1) and the outer edge of the stop (7). The compression spring gives the stop (7) an inward force. The outer end of the rectangular rod (14) has multiple serrated grooves (15); the cylindrical block (8) is fitted with a stop bar (16), the inner end of the stop bar (16) is a slope, and the slope of the stop bar (16) can be placed in the serrated groove (15); When the inclined surface of the stop bar (16) is placed in the sawtooth groove (15), the rectangular bar (14) can move inward, and under the action of the compression spring, the stop block (7) and the inclined surface at the end of the third arc plate (5) are always in contact, but the rectangular bar (14) cannot move outward to fix the rectangular bar (14); The outer end of the stop rod (16) is located outside the cylindrical block (8). A spring is fitted on the stop rod (16). One end of the spring is fixed to the cylindrical block (8), and the other end of the spring is fixed to the stop rod (16). The spring causes the stop rod (16) to have a force that moves towards the rectangular rod (14). The outer ends of the two stop bars (16) on the cylindrical block (8) are fixed together by a crossbar; Two clearance slots (17) are provided on the second arc plate (3). The rectangular rod (14) passes through the slots (17). When the second arc plate (3) rotates, the rectangular rod (14) does not interfere with the clearance slots (17).

6. The building pipe fixing and installation device according to any one of claims 1-5, characterized in that, Each of the third arc-shaped plates (5) has an arc-shaped block (6) on its inner edge. The arc-shaped block (6) rotates around the axis of the third arc-shaped plate (5) and does not detach from the third arc-shaped plate (5). The inner edge of the third arc plate (5) is provided with a trapezoidal groove, which is arranged along the circumference of the third arc plate (5). The outer edge of the arc block (6) is provided with a trapezoidal block (19), which slides in the trapezoidal groove. There is friction between the trapezoidal block (19) and the trapezoidal groove. The inner edge of the arc-shaped block (6) is fixed with a rubber layer.

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