A fixing device for stability testing of pipes used in building construction

Abstract

This invention relates to the field of pipe fixing, specifically to a fixing device for testing the stability of pipes used in building construction. The device includes a base, two slide rails, two U-shaped support seats, two clamping assemblies, and two check mechanisms. The slide rails are parallel to each other and symmetrically distributed on both sides of the top of the base. The U-shaped support seats are all positioned with their openings facing upwards on the slide rails. The clamping assemblies are respectively axially connected to the inner side of the U-shaped support seats. Each clamping assembly consists of a U-shaped support frame, a support carrier, a V-shaped pressure arm, a lifting mechanism, and a clamping mechanism. The check mechanisms are located between the U-shaped support seats and the base. This device can better clamp pipes of various lengths and sizes, offering strong compatibility, a simple structure, and easy operation. It allows for convenient placement and efficient operation during building construction. The lifting and clamping mechanisms can clamp pipes over a wide range, enabling the fixing of different pipe types with a single device.

Description

Technical Field

[0001] This invention relates to the field of pipe fixing, specifically to a fixing device for testing the stability of pipes used in building construction. Background Technology

[0002] Pipes used in building construction need to meet specific performance indicators (STIs) under certain operating conditions, such as tensile strength, flexural strength, and fracture toughness. Testing these indicators requires applying a certain force to the pipe, fixing both ends, and then applying downward pressure to the middle. The pipe is then observed to return to its pre-set straightness after being compressed. During construction, longer pipes are often hoisted. The distance between hoisting devices is usually determined based on the experience of the construction workers, which cannot accurately determine the optimal hoisting spacing. Using too many hoisting devices may increase construction costs. Therefore, it is necessary to measure the optimal hoisting spacing for long pipes. At this spacing, even when the long pipe is subjected to force, it can return to a straight state.

[0003] During the inspection process, due to the diverse shapes of pipes in buildings, including square and round pipes, traditional clamps cannot be applied to pipes of different shapes.

[0004] Secondly, the diameter of the pipe being tested may vary, and traditional test pipe clamps cannot be quickly adjusted effectively.

[0005] Furthermore, the spacing of traditional pipe fitting test fixtures is generally fixed, and adjustments are usually made by tightening or loosening bolts, which is inefficient. Summary of the Invention

[0006] Therefore, it is necessary to provide a fixing device for testing the stability of pipes used in building construction, addressing the existing technical problems.

[0007] To solve the problems of the prior art, the technical solution adopted by the present invention is as follows:

[0008] A fixing device for stability testing of pipes used in building construction includes:

[0009] The base is set horizontally.

[0010] Two slide rails are parallel to each other and symmetrically distributed on both sides of the top of the base, and the slide rails are parallel to the length direction of the base;

[0011] Two vertically arranged U-shaped support seats are set on the slide rail with their openings facing upwards, and the two U-shaped support seats are spaced apart along the length of the slide rail;

[0012] Two clamping assemblies are respectively axially connected to the inner sides of two U-shaped support seats. Each clamping assembly consists of a U-shaped support frame, a support carrier located in the lower inner half of the U-shaped support frame, a V-shaped pressure arm located in the upper inner half of the U-shaped support frame, a lifting mechanism that drives the V-shaped pressure arm to rise and fall, and a clamping mechanism that controls the included angle of the V-shaped pressure arm. The lifting mechanism is located in the upper half of the U-shaped support frame, and the clamping mechanism is located on the lifting output end of the lifting mechanism.

[0013] Two check valves are installed between two U-shaped support seats and the base.

[0014] Furthermore, the support vehicle includes:

[0015] Two vertical support plates are fixedly installed in parallel on the inner bottom wall of the U-shaped support frame. The length direction of the vertical support plates is parallel to the width direction of the U-shaped support frame. Each vertical support plate has a V-shaped notch at the top. A rectangular block is formed on the inner bottom of the V-shaped notch. Two first shaft holes are provided on the rectangular block. The axes of the two first shaft holes are set at a V-shaped angle, and the axes of the two first shaft holes are parallel to the two sides of the V-shaped notch.

[0016] There are four first rollers, which are arranged in pairs on two vertical support plates. The two first rollers in each pair are arranged at a V-shaped angle. The near ends of the two first rollers on each vertical support plate are connected to the corresponding two first shaft holes. An end block is fixedly provided at the top of each end of each V-shaped notch. Each end block is provided with a second shaft hole for the upper end of the first roller to be connected.

[0017] Furthermore, the V-shaped pressure arm includes:

[0018] Two clamping arms are located on the upper inner part of the U-shaped support frame, and the upper ends of the two clamping arms are joined at an included angle.

[0019] The second roller is of two types, symmetrically arranged inside the V-shaped pressure arm. The axes of the two second rollers are arranged at an angle, and the two ends of the opposing sides of the two clamping arms are fixedly provided with bearing seats for connecting the second rollers.

[0020] Two first hinge seats are symmetrically fixed on the outside of the two clamping arms, and the two first hinge seats are connected to the clamping mechanism above.

[0021] Furthermore, the clamping mechanism includes:

[0022] A pull rod is positioned above the V-shaped pressure arm, with its lower end connected to two clamping arms, and the upper ends of both clamping arms being axially connected to the lower end of the pull rod.

[0023] A rectangular base is fixedly installed on the lifting output end of the lifting mechanism, and a pull rod is fixedly installed at the bottom of the rectangular base;

[0024] A vertical threaded rod is installed vertically and its lower end is fixedly connected to a rectangular base.

[0025] A threaded sleeve is fitted onto a vertical threaded rod.

[0026] Double row tapered bearing, fixedly sleeved on the outside of the threaded sleeve;

[0027] Two semi-circular clamps are attached together to the outer ring of the double-row tapered bearing, and the ends of the two semi-circular clamps are formed with strip-shaped connecting ears.

[0028] Two first links are located above the two clamping arms respectively. The upper end of each first link is hinged to the strip connecting lug at the same end of the two semi-circular clamps, and the lower end is connected to the first hinge seat on the clamping arm on the same side.

[0029] Furthermore, the clamping mechanism also includes:

[0030] An elastic retaining ring is provided between the semi-circular clamp and the double-row tapered bearing. Both the outer wall of the double-row tapered bearing and the inner wall of the semi-circular clamp are provided with annular grooves for the elastic retaining ring to engage.

[0031] The lower half of the outer side of the threaded sleeve is formed with external threads for connecting the screw cap, and the upper outer side of the threaded sleeve is formed with an annular protrusion for abutting downward against the inner ring of the double row tapered bearing.

[0032] The lower end of the pull rod is formed with a first circular connecting lug, and the upper ends of the two clamping arms are each formed with a second circular connecting lug for hinged connection with the first circular connecting lug.

[0033] Furthermore, the lifting mechanism includes:

[0034] Two vertical slide rails are respectively set on the two vertical inner walls of the U-shaped support frame. Each vertical slide rail has a limiting block fixed at the upper end on the inner wall of the U-shaped support frame.

[0035] Two vertical sliders are connected to two vertical slide rails respectively;

[0036] The lifting platform is horizontally set inside the U-shaped support frame. Both ends of the lifting platform are fixedly connected to two sliders respectively. The lifting platform is formed with a clearance through hole for avoiding the first connecting rod.

[0037] A bidirectional threaded rod is set horizontally, and its two ends are mounted on the top of a U-shaped support frame via two first bearing seats. One end of the bidirectional threaded rod is fixedly connected to a rotating handle.

[0038] Two threaded connecting blocks are symmetrically fitted onto a bidirectional threaded rod, and each threaded connecting block is formed with a third circular connecting lug;

[0039] The second hinge seat is fixedly installed on the top of the lifting platform;

[0040] The two second connecting rods are hinged at their upper ends to two threaded connecting blocks respectively, and at their lower ends to the second hinge seat.

[0041] Furthermore, stop-loss mechanisms include:

[0042] A unidirectional long rack is fixedly installed on the top of the base plate and located between two slide rails, and is fixedly connected to the top of the base with a positioning mounting strip;

[0043] A unidirectional short rack with elastic meshing is located at the top of a unidirectional long rack;

[0044] The U-shaped bracket is fixedly installed on one side of the lower end of the U-shaped support base with the opening facing downward. The one-way short rack is located inside the U-shaped bracket and the two sides of the one-way short rack slide against the inner wall of the U-shaped bracket respectively.

[0045] The L-shaped connecting bracket is installed on both sides of the outer perimeter of the U-shaped bracket to fix the U-shaped bracket and the U-shaped support base;

[0046] The bolt is vertical and its lower end passes through the middle of the U-shaped bracket and is fixed to the unidirectional short rack below.

[0047] A spring is fitted onto the outside of the bolt, with its upper and lower ends abutting against the top wall of the U-shaped bracket and a one-way short rack, respectively.

[0048] The limit bolt is fixedly connected to the top of the U-shaped bracket;

[0049] The semi-circular buckle is fitted to the top of the U-shaped bracket. One end of the semi-circular buckle is axially connected to the limit bolt, and the other end can be inserted between the cap of the bolt and the U-shaped bracket.

[0050] Furthermore, the U-shaped support frame includes:

[0051] Two fixed axes are symmetrically formed on the outside of the U-shaped support frame;

[0052] Two support frames are symmetrically arranged on the lower inner half of the U-shaped support frame. The upper and lower ends of each support frame are fixed to the side wall and bottom wall of the U-shaped support frame, respectively. The U-shaped support frame is formed with strip grooves.

[0053] Furthermore, a second bearing seat is fixedly installed at the top of both ends of the U-shaped support base. The two second bearing seats are respectively connected to two fixed shafts. A slider is installed at both ends of the bottom of the U-shaped support base. The two sliders are respectively installed on two slide rails.

[0054] Furthermore, the top of the rectangular base is formed with a cylindrical sleeve for inserting a vertical threaded rod, and both the cylindrical sleeve and the vertical threaded rod are formed with corresponding pin holes.

[0055] The beneficial effects of this invention compared to the prior art are:

[0056] Firstly, this device can rotate to follow the deformation of the pipe when it is under pressure, and the contact between the clamp and the pipe is a rolling contact, thus adapting to the shape changes of the pipe during the testing process.

[0057] Secondly, this device has a simple structure and is easy to operate. It uses a quick tightening and loosening method when adjusting the clamp spacing, which greatly increases the efficiency of clamp spacing adjustment.

[0058] Thirdly, this device uses a lifting mechanism to lift the V-shaped clamping arm. By combining this with a larger angle of the V-shaped clamping arm, it can stably clamp pipes with larger diameters. With a smaller angle of the V-shaped clamping arm, it can stably press pipes with smaller diameters, making it extremely versatile. Attached Figure Description

[0059] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0060] Figure 2 This is the left view of the present invention;

[0061] Figure 3 This is a schematic diagram of the clamp of the present invention. Figure 1 ;;

[0062] Figure 4 This is a schematic diagram of the clamp of the present invention. Figure 2 ;

[0063] Figure 5 yes Figure 3 Top view;

[0064] Figure 6 yes Figure 5 Sectional view of B;

[0065] Figure 7 This is a three-dimensional structural schematic diagram of the support carrier of the present invention;

[0066] Figure 8 This is a partial exploded view of the structure of the present invention;

[0067] Figure 9 yes Figure 1 A magnified view of part A in the diagram;

[0068] Figure 10 This is an exploded view of the check valve mechanism.

[0069] The following are the labels in the diagram: 1. Base; 2. Slide rail; 3. U-shaped support seat; 4. Slider; 5. Second bearing seat; 6. Check mechanism; 7. One-way long rack; 8. Positioning mounting strip; 9. One-way short rack; 10. Bolt; 11. Spring; 12. U-shaped bracket; 13. Semi-ring buckle; 14. Limit bolt; 15. L-shaped connecting frame; 16. Clamp assembly; 17. U-shaped support frame; 18. Fixed shaft; 19. Support frame; 20. Strip groove; 21. Support carrier; 22. Vertical support plate; 23. V-shaped notch; 24. Rectangular block; 25. First shaft hole; 26. First roller; 27. End block; 28. Second shaft hole; 29. ​​V-shaped pressure arm; 30. Clamping arm; 31. First circular connecting lug; 32. First hinge seat; 33. Second roller 34. Shaft seat; 35. Lifting mechanism; 36. Vertical slide rail; 37. Vertical slider; 38. Limit block; 39. Lifting platform; 40. Clearance through hole; 41. Second hinge seat; 42. Second connecting rod; 43. Threaded connecting block; 44. Third circular connecting ear; 45. First bearing seat; 46. Bidirectional threaded rod; 47. Rotary handle; 48. Clamping mechanism; 49. Semi-circular clamp; 50. Strip connecting ear; 51. Elastic limit ring; 52. Vertical threaded rod; 53. Rotary cap; 54. Threaded sleeve; 55. External thread; 56. Annular protrusion; 57. Double row tapered bearing; 58. Tie rod; 59. Second circular connecting ear; 60. Rectangular seat; 61. Cylindrical sleeve; 62. Pin hole; 63. First connecting rod; 64. Annular groove; 65. Tube. Detailed Implementation

[0070] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0071] refer to Figures 1 to 10 A fixing device for stability testing of pipes used in building construction includes: a base 1, horizontally positioned; two parallel slide rails 2, symmetrically distributed on the top sides of the base 1, the slide rails 2 being parallel to the length direction of the base 1; two vertically positioned U-shaped support seats 3, both opening upwards and positioned on the slide rails 2, with the two U-shaped support seats 3 spaced apart along the length direction of the slide rails 2; and two clamping assemblies 16, respectively axially connected to the inner sides of the two U-shaped support seats 3, each clamp... Component 16 consists of a U-shaped support frame 17, a support carrier 21 located in the lower inner half of the U-shaped support frame 17, a V-shaped pressure arm 29 located in the upper inner half of the U-shaped support frame 17, a lifting mechanism 35 that drives the V-shaped pressure arm 29 to rise and fall, and a clamping mechanism 48 that controls the included angle of the V-shaped pressure arm 29. The lifting mechanism 35 is located in the upper half of the U-shaped support frame 17, and the clamping mechanism 48 is located on the lifting output end of the lifting mechanism 35. Two check mechanisms 6 are located between the two U-shaped support seats 3 and the base 1.

[0072] When the device is in use, the distance between the two U-shaped support seats 3 on the slide rail 2 is adjusted according to the length of the tube 65 so that both ends of the tube 65 can be mounted on the corresponding U-shaped support seats 3. The included angle of the V-shaped pressure arm 29 is adjusted according to the shape of the tube 65. When the tube 65 is a square tube, the included angle of the V-shaped pressure arm 29 is adjusted to 90°. Then, the lifting mechanism 35 drives the entire V-shaped pressure arm 29 to descend until the end of the square tube is pressed tightly onto the support carrier 21.

[0073] When the pipe 65 is a round pipe, the V-shaped pressure arm 29 can be lowered by the lifting mechanism 35 to press the pipe 65 onto the support carrier 21. When pressing the round pipe, the included angle of the V-shaped pressure arm 29 can be adjusted to accommodate pipes 65 of different diameters. When the diameter of the pipe 65 is large, the included angle of the V-shaped pressure arm 29 is increased to ensure that the V-shaped pressure arm 29 can fully press the pipe 65 below. When the diameter of the pipe 65 is small, the included angle of the V-shaped pressure arm 29 is decreased to ensure that the V-shaped pressure arm 29 can press the small-diameter pipe 65 onto the support carrier 21.

[0074] When both ends of the pipe 65 are clamped by two clamping assemblies 16, pressure is then applied from top to bottom to the middle of the pipe 65 to cause deformation in the middle, thus causing the end of the pipe 65 to rise. During this process, because the clamping assembly 16 is axially connected to the U-shaped support 3, the clamping assembly 16 can rotate at a corresponding angle on the U-shaped support 3 when the pipe 65 bends, thereby adapting to the upward movement of the end of the pipe 65. At the same time, due to the deformation and bending of the pipe 65, the original contact position between the clamping assembly 16 and the end of the pipe 65 changes. Specifically, the pipe 65 is straight when not under force, and becomes arc-shaped after being under force. At this time, the total length of the pipe 65 between the two clamping assemblies 16 will increase, which will cause the initial clamping position between the clamping assembly 16 and the pipe 65 to change. This change is adapted by setting the first roller 26 and the second roller 33 on the support carrier 21 and the V-shaped pressure arm 29 respectively. This fixing device can adapt to the shape change of the pipe 65 during the deformation detection process. During the process of the pipe 65 being compressed and deformed and recovering, the rolling clamping cooperation between its two ends and the clamping assembly 16 can make the pipe 65 recover to a state that tends to be straight. At this time, the tester can measure the deformation of the pipe 65 before and after being compressed, and then obtain the stability of the deformation recovery of the tested pipe 65 after being subjected to force.

[0075] The support carrier 21 includes two vertical support plates 22, which are fixedly mounted parallel to each other on the inner bottom wall of the U-shaped support frame 17. The length direction of the vertical support plates 22 is parallel to the width direction of the U-shaped support frame 17. Each vertical support plate 22 has a V-shaped notch 23 at its top. A rectangular block 24 is formed on the inner bottom of the V-shaped notch 23. The rectangular block 24 has two first shaft holes 25. The axes of the two first shaft holes 25 are set at a V-shaped angle, and the axes of the two first shaft holes 25 are respectively... Parallel to both sides of the V-shaped notch 23; there are four first rollers 26, which are arranged in pairs on two vertical support plates 22. The two first rollers 26 in each group are arranged at a V-shaped angle, and the near ends of the two first rollers 26 on each vertical support plate 22 are respectively connected to the two corresponding first shaft holes 25. Each end block 27 is fixedly provided at the top of both ends of each V-shaped notch 23, and each end block 27 is provided with a second shaft hole 28 for the upper end of the first roller 26 to be connected.

[0076] Two vertical support plates 22 provide a clamping platform for the tube 65, which cooperates with the clamping arm 30 to clamp the tube 65. The first roller 26 provides rolling friction when the tube 65 contacts the clamp. The shaft hole on the end block 27 and the shaft hole on the shaped rectangular block 24 on the vertical support plate 22 provide a shaft connection for the first roller 26.

[0077] The V-shaped pressure arm 29 includes: two clamping arms 30, which are disposed on the upper inner side of the U-shaped support frame 17, and the upper ends of the two clamping arms 30 are axially connected at an angle; wherein, there are two second rollers 33, which are symmetrically disposed on the inner side of the V-shaped pressure arm 29, and the axes of the two second rollers 33 are axially connected at an angle, and the two ends of the opposing side of the two clamping arms 30 are fixedly provided with bearing seats 34 for connecting the second rollers 33; two first hinge seats 32 are symmetrically fixed on the outer side of the two clamping arms 30, and the two first hinge seats 32 are connected to the clamping mechanism 48 above.

[0078] The two clamping arms 30, together with the vertical support plate 22, clamp the pipe 65. The second roller 33 works together to provide rolling friction when clamping the pipe 65. The first hinge seat 32 and the clamping arms 30 provide a hinge for the clamping mechanism 48.

[0079] The clamping mechanism 48 includes: a pull rod 58, positioned above the V-shaped pressure arm 29, with its lower end connected to two clamping arms 30, the upper ends of which are axially connected to the lower end of the pull rod 58; a rectangular seat 60, fixedly mounted on the lifting output end of the lifting mechanism 35, with the pull rod 58 fixedly mounted on the bottom of the rectangular seat 60; a vertical threaded rod 52, vertically positioned with its lower end fixedly connected to the rectangular seat 60; and a threaded sleeve 54 connected to the vertical threaded rod 52. Above; a double-row tapered bearing 57, fixedly sleeved on the outside of the threaded sleeve 54; two semi-circular clamps 49, both of which are mounted on the outer ring of the double-row tapered bearing 57, and the ends of the two semi-circular clamps 49 are formed with strip-shaped connecting ears 50; two first connecting rods 63, respectively located above the two clamping arms 30, the upper end of each first connecting rod 63 is hinged to the strip-shaped connecting ears 50 at the same end of the two semi-circular clamps 49, and the lower end is connected to the first hinge seat 32 on the clamping arm 30 on the same side.

[0080] The rectangular seat 60 is fixed to the output end of the lifting mechanism 35, so that the lifting mechanism 35 can lift and lower at the same time, driving the clamping mechanism 48 to lift and lower. By rotating the threaded sleeve 54, the vertical threaded rod 52 moves up and down. When the threaded sleeve moves downward, it drives the double-row tapered bearing 57, the semi-circular clamp 49, and the upper end of the first connecting rod 63 to move downward together, thereby increasing the included angle between the two first connecting rods 63, which in turn increases the included angle between the two clamping arms 30. When the thread moves upward, the included angle between the two second connecting rods 42 decreases, which in turn decreases the included angle between the two clamping arms 30. The vertical threaded rod 52 provides a movement path for the threaded sleeve 54. The semi-circular clamp 49 holds the double-row tapered bearing 57 to connect the upper end of the second connecting rod 42, so that the upper end of the second connecting rod 42 can move up and down with the threaded sleeve 54. The first connecting rod 63 does not rotate with the threaded sleeve 54. The use of the double-row tapered bearing 57 ensures that the semi-circular clamp 49 does not rotate with the threaded sleeve 54, and at the same time, it allows the double-row tapered bearing 57 to withstand vertical forces.

[0081] The clamping mechanism 48 further includes: an elastic limiting ring 51, disposed between the semi-circular clamp 49 and the double-row tapered bearing 57, with annular grooves 64 on both the outer wall of the double-row tapered bearing 57 and the inner wall of the semi-circular clamp 49 for engaging the elastic limiting ring 51; a screw cap 53, with an external thread 55 formed on the lower outer half of the threaded sleeve 54 for connecting the screw cap 53, and an annular protrusion 56 formed on the outer upper end of the threaded sleeve 54 for abutting downward against the inner ring of the double-row tapered bearing 57; a first circular connecting lug 31 formed at the lower end of the pull rod 58, and a second circular connecting lug 59 formed at the upper end of each of the two clamping arms 30 for hinged to the first circular connecting lug 31.

[0082] An elastic retaining ring 51, made of steel with a notch, is fitted between the semi-circular clamp 49 and the double-row tapered bearing 57 to prevent the semi-circular clamp from sliding up and down with the bearing. The top of the screw cap 53 abuts against the bottom of the double-row tapered bearing 57, fixing the double-row bearing onto the threaded sleeve 54.

[0083] The lifting mechanism 35 includes: two vertical slide rails 36, both vertically arranged on the two vertical inner walls of the U-shaped support frame 17; a limiting block 38 fixedly arranged on the upper end of each vertical slide rail 36 on the inner wall of the U-shaped support frame 17; two vertical sliders 37, respectively connected to the two vertical slide rails 36; and a lifting platform 39, horizontally arranged on the inner side of the U-shaped support frame 17, with both ends of the lifting platform 39 fixedly connected to the two sliders 4, and the lifting platform 39 having a clearance through hole 4 for avoiding the first connecting rod 63. 0; a bidirectional threaded rod 46 is set horizontally, and its two ends are mounted on the top of the U-shaped support frame 17 through two first bearing seats 45. One end of the bidirectional threaded rod 46 is fixedly connected to a handle 47; two threaded connecting blocks 43 are symmetrically sleeved on the bidirectional threaded rod 46, and each threaded connecting block 43 is formed with a third circular connecting lug 44; a second hinge seat 41 is fixedly set on the top of the lifting platform 39; two second connecting rods 42, the upper ends of which are respectively hinged to the two threaded connecting blocks 43, and the lower ends are both axially connected to the second hinge seat 41.

[0084] The lifting mechanism 35 is raised and lowered by rotating the handle 47. Rotating the handle 47 drives the bidirectional threaded rod 46 to rotate, thereby bringing the two threaded connecting blocks 43 closer or farther apart. This then drives the two second connecting rods 42, changing the included angle of the second connecting rods 42. This causes the distance between the lifting platform 39 and the bidirectional threaded rod 46 to increase or decrease. A smaller included angle of the second connecting rods 42 results in a larger distance, and vice versa. Furthermore, a slider 4 is fixedly connected to the lifting platform 39. The vertical slider 37 slides and rubs against the vertical slide rail 36, thus enabling the lifting platform 39 to achieve smooth lifting. The second hinge seat 41 is used to hinge the second connecting rods 42 to the lifting platform 39.

[0085] The anti-return mechanism 6 includes: a one-way long rack 7, fixedly mounted on the top of the base 1 and located between two slide rails 2, and fixedly connected to the top of the base 1 by a positioning mounting strip 8; a one-way short rack 9, elastically engaged on the top of the one-way long rack 7; a U-shaped bracket 12, fixedly mounted on one side of the lower end of the U-shaped support 3 with its opening facing downwards, the one-way short rack 9 located inside the U-shaped bracket 12 and its two sides slidingly abutting against the inner wall of the U-shaped bracket 12; and an L-shaped connecting bracket 15, located on both sides of the outer periphery of the U-shaped bracket 12, and fixedly connected to the U-shaped support 3. The bracket 12 and the U-shaped support base 3; the bolt 10, which is vertical and whose lower end passes through the middle of the U-shaped bracket 12 and is fixed to the one-way short rack 9 below; the spring 11, which is sleeved on the outside of the bolt 10, with the upper and lower ends of the spring 11 abutting against the top wall of the U-shaped bracket 12 and the one-way short rack 9 respectively; the limit bolt 14, which is fixedly connected to the top of the U-shaped bracket 12; and the semi-ring buckle 13, which is fitted to the top of the U-shaped bracket 12, with one end of the semi-ring buckle 13 axially connected to the limit bolt 14 and the other end able to be inserted between the cap end of the bolt 10 and the U-shaped bracket 12.

[0086] The check mechanism 6 prevents the device from rebounding. It utilizes the meshing of a one-way long rack 7 and a one-way short rack 9 to achieve a reversing effect. Pulling the bolt 10 on the U-shaped bracket 12 disengages the one-way long rack 7 and the one-way short rack 9. When the bolt 10 is pulled up, the semi-ring buckle 13 engages between the cap of the bolt 10 and the U-shaped bracket 12 to prevent the bolt 10 from descending, thus stopping the descent of the one-way short rack 9, releasing the check mechanism, and allowing the U-shaped support 3 to retract. The limit bolt 14 limits the position of the semi-ring buckle 13, allowing it to rotate around the limit bolt 14. The check mechanism 6 enters the check state via the spring 11 fitted on the bolt 10, ensuring better meshing of the one-way short rack 9 and the one-way long rack 7 during operation.

[0087] The U-shaped support frame 17 includes: two fixed shafts 18, symmetrically formed on the outside of the U-shaped support frame 17, and the U-shaped support frame 17 is formed with a strip groove (20); two support frames 19, symmetrically arranged on the lower inner half of the U-shaped support frame 17, and the upper and lower ends of each support frame 19 are respectively fixed to the side wall and bottom wall of the U-shaped support frame 17.

[0088] The top of both ends of the U-shaped support 3 is fixedly provided with a second bearing seat 5. The two second bearing seats 5 are respectively connected to two fixed shafts 18. The bottom ends of the U-shaped support 3 are provided with sliders 4. The two sliders 4 are respectively set on two slide rails 2.

[0089] The U-shaped support frame 17 provides a carrier for the clamping fixture and is axially connected to the U-shaped support base 3 via the second fixed bearings 34 on both sides, giving the U-shaped support frame 17 a certain moment of rotational inertia. The U-shaped support base 3 is connected to the slide rail 2 via the slider 4, which is used for the translation of the U-shaped support base 3, thereby clamping pipes 65 of different lengths.

[0090] The top of the rectangular base 60 is formed with a cylindrical sleeve 61 for inserting the vertical threaded rod 52. Both the cylindrical sleeve 61 and the vertical threaded rod 52 have corresponding pin holes 62. This securely connects the rectangular base 60 and the vertical threaded rod 52, preventing the vertical threaded rod from rotating.

[0091] Working principle: By moving the U-shaped support base 3, pipes 65 of different lengths can be clamped. Once moved to the appropriate position, the position is restricted by the check mechanism 6. The clamping assembly 16 inside the U-shaped support base 3 can change the height of the clamping arms 30 by rotating the handle 47 to clamp pipes 65 of different sizes. If the height is insufficient, the angle of the clamping arms 30 can be changed by rotating the threaded sleeve 54. Through the cooperation of these two, pipes 65 of different sizes can be clamped. After the pipe 65 is placed in, rotating the handle 47 and the screw cap 53 adjusts the height and angle of the two clamping arms 30 respectively, so that the clamping arms 30 can fit tightly against the pipe 65, thereby better fixing the pipe 65.

Claims

1. A fixing device for testing the stability of pipes used in building construction, characterized in that, include: The base (1) is set in a horizontal position; Two slide rails (2) are parallel to each other and symmetrically distributed on both sides of the top of the base (1). The slide rails (2) are parallel to the length direction of the base (1). Two vertically arranged U-shaped support seats (3) are set on the slide rail (2) with their openings facing upwards, and the two U-shaped support seats (3) are spaced apart along the length of the slide rail (2); Two clamping assemblies (16) are respectively axially connected to the inner side of two U-shaped support seats (3). Each clamping assembly (16) consists of a U-shaped support frame (17), a support carrier (21) located in the lower half of the inner side of the U-shaped support frame (17), a V-shaped pressure arm (29) located in the upper half of the inner side of the U-shaped support frame (17), a lifting mechanism (35) that drives the V-shaped pressure arm (29) to rise and fall, and a clamping mechanism (48) that controls the included angle of the V-shaped pressure arm (29). The lifting mechanism (35) is located in the upper half of the U-shaped support frame (17), and the clamping mechanism (48) is located on the lifting output end of the lifting mechanism (35). Two check mechanisms (6) are respectively set between two U-shaped support seats (3) and the base (1); Each support carrier (21) and V-shaped pressure arm (29) is provided with a first roller (26) and a second roller (33) that abut against the pipe (65).

2. The fixing device for stability testing of pipes used in building construction according to claim 1, characterized in that, The support vehicle (21) includes: Two vertical support plates (22) are fixedly installed on the inner bottom wall of the U-shaped support frame (17) in a parallel state. The length direction of the vertical support plate (22) is parallel to the width direction of the U-shaped support frame (17). A V-shaped notch (23) is opened at the top of each vertical support plate (22). A rectangular block (24) is formed on the inner bottom of the V-shaped notch (23). Two first shaft holes (25) are provided on the rectangular block (24). The axes of the two first shaft holes (25) are set at a V-shaped angle, and the axes of the two first shaft holes (25) are parallel to the two sides of the V-shaped notch (23). There are four first rollers (26), which are set in pairs on two vertical support plates (22). The two first rollers (26) in each pair are set at a V-shaped angle. The near ends of the two first rollers (26) on each vertical support plate (22) are connected to the corresponding two first shaft holes (25). Each V-shaped notch (23) has an end block (27) fixedly set at the top of both ends. Each end block (27) has a second shaft hole (28) for connecting the upper end of the first roller (26).

3. The fixing device for stability testing of pipes used in building construction according to claim 1, characterized in that, V-shaped pressure arms (29) include: Two clamping arms (30) are set on the upper part of the inner side of the U-shaped support frame (17), and the upper ends of the two clamping arms (30) are connected at an angle. Two first hinge seats (32) are symmetrically fixed on the outside of the two clamping arms (30), and the two first hinge seats (32) are connected to the clamping mechanism (48) above. There are two second rollers (33), which are symmetrically arranged inside the V-shaped pressure arm (29). The axes of the two second rollers (33) are arranged at an angle. Both ends of the two clamping arms (30) facing each other are fixedly provided with bearing seats (34) for connecting the second rollers (33).

4. A fixing device for stability testing of pipes used in building construction according to claim 3, characterized in that, The clamping mechanism (48) includes: A pull rod (58) is set above the V-shaped pressure arm (29), and the lower end of the pull rod (58) is connected to two clamping arms (30), and the upper ends of the two clamping arms (30) are axially connected to the lower end of the pull rod (58). A rectangular base (60) is fixedly installed on the lifting output end of the lifting mechanism (35), and a pull rod (58) is fixedly installed on the bottom of the rectangular base (60); The vertical threaded rod (52) is set in a vertical position and its lower end is fixedly connected to the rectangular seat (60); Threaded sleeve (54) is attached to vertical threaded rod (52); A double-row tapered bearing (57) is fixedly sleeved on the outside of a threaded sleeve (54); Two semi-circular clamps (49) are attached together to the outer ring of the double-row tapered bearing (57), and the ends of the two semi-circular clamps (49) are formed with strip-shaped connecting ears (50). Two first links (63) are located above the two clamping arms (30), and the upper end of each first link (63) is hinged to the strip connecting lug (50) at the same end of the two semi-circular clamps (49), and the lower end is connected to the first hinge seat (32) on the clamping arm (30) on the same side.

5. A fixing device for stability testing of pipes used in building construction according to claim 4, characterized in that, The clamping mechanism (48) also includes: An elastic retaining ring (51) is provided between a semi-circular clamp (49) and a double-row tapered bearing (57). Both the outer wall of the double-row tapered bearing (57) and the inner wall of the semi-circular clamp (49) are provided with annular grooves (64) for the elastic retaining ring (51) to engage. The lower half of the outer side of the screw cap (53) and the threaded sleeve (54) is formed with an external thread (55) for connecting the screw cap (53), and the outer side of the upper end of the threaded sleeve (54) is formed with an annular protrusion (56) for abutting downward against the inner ring of the double row tapered bearing (57). The lower end of the pull rod (58) is formed with a first circular connecting lug (31), and the upper ends of the two clamping arms (30) are each formed with a second circular connecting lug (59) for hinged to the first circular connecting lug (31).

6. A fixing device for stability testing of pipes used in building construction according to claim 4, characterized in that, The lifting mechanism (35) includes: Two vertical slide rails (36) are vertically arranged on the two vertical inner walls of the U-shaped support frame (17). Each vertical slide rail (36) has a limiting block (38) fixedly arranged on the inner wall of the U-shaped support frame (17) at its upper end. Two vertical sliders (37) are connected to two vertical slide rails (36) respectively; The lifting platform (39) is set horizontally inside the U-shaped support frame (17). The two ends of the lifting platform (39) are fixedly connected to two vertical sliders (37). The lifting platform (39) has a clearance through hole (40) for avoiding the first connecting rod (63). The bidirectional threaded rod (46) is set in a horizontal position, and its two ends are mounted on the top of the U-shaped support frame (17) through two first bearing seats (45). One end of the bidirectional threaded rod (46) is fixedly connected to a handle (47). Two threaded connecting blocks (43) are symmetrically fitted onto a bidirectional threaded rod (46), and each threaded connecting block is formed with a third circular connecting lug (44). The second hinge seat (41) is fixedly installed on the top of the lifting platform (39); The two second connecting rods (42) are hinged at their upper ends to the two threaded connecting blocks (43) respectively, and their lower ends are axially connected to the second hinge seat (41).

7. A fixing device for stability testing of pipes used in building construction according to claim 1, characterized in that, The check mechanism (6) includes: A unidirectional long rack (7) is fixedly set on the top of the base plate and located between two slide rails, and is fixedly connected to the top of the base (1) by a positioning mounting strip (8); A unidirectional short rack (9) is elastically engaged at the top of a unidirectional long rack (7); The U-shaped bracket (12) is fixedly installed on one side of the lower end of the U-shaped support base (3) with the opening facing downward. The one-way short rack (9) is located inside the U-shaped bracket (12) and the two sides of the one-way short rack (9) slide against the inner wall of the U-shaped bracket (12). L-shaped connecting bracket (15) is set on both sides of the periphery of U-shaped bracket (12) to fix the U-shaped bracket (12) and U-shaped support base (3). Bolt (10) is in a vertical position and its lower end passes through the middle of the U-shaped bracket (12) and is fixed to the unidirectional short rack (9) below; Spring (11) is sleeved on the outside of bolt (10). The upper and lower ends of spring (11) abut against the top wall of U-shaped bracket (12) and unidirectional short rack (9), respectively. The limiting bolt (14) is fixedly connected to the top of the U-shaped bracket (12); A semi-circular buckle (13) is fitted to the top of the U-shaped bracket (12). One end of the semi-circular buckle (13) is axially connected to the limiting bolt (14), and the other end can be embedded between the cap of the bolt (10) and the U-shaped bracket (12).

8. A fixing device for stability testing of pipes used in building construction according to claim 1, characterized in that, The U-shaped support frame (17) includes: Two fixed axes (18) are symmetrically formed on the outside of the U-shaped support frame (17); Two support frames (19) are symmetrically arranged on the lower inner half of the U-shaped support frame (17). The upper and lower ends of each support frame (19) are respectively fixed to the side wall and bottom wall of the U-shaped support frame (17). The U-shaped support frame (17) is formed with a strip groove (20).

9. A fixing device for stability testing of pipes used in building construction according to claim 8, characterized in that, The top of both ends of the U-shaped support (3) is fixedly provided with a second bearing seat (5). The two second bearing seats (5) are respectively connected to two fixed shafts (18). The bottom ends of the U-shaped support (3) are provided with sliders (4). The two sliders (4) are respectively set on two slide rails.

10. A fixing device for stability testing of pipes used in building construction according to claim 4, characterized in that, The top of the rectangular base (60) is formed with a cylindrical sleeve (61) for inserting a vertical threaded rod (52), and both the cylindrical sleeve (61) and the vertical threaded rod (52) are formed with corresponding pin holes (62).

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