A large-diameter pipeline structure is conveniently and quickly installed on a steep slope section

By designing retractable and flexible connecting components and hydraulic jack support components on large-diameter pipes, the problem of low installation efficiency on steep slopes has been solved, enabling rapid installation and convenient transportation.

CN116677841BActive Publication Date: 2025-12-19云南省水利水电工程有限公司
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Patent Information

Application Number
CN202310675801.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-06-08
Publication Date
2025-12-19
Estimated Expiration
2043-06-08

AI Technical Summary

Technical Problem

When installing large-diameter pipelines on steep slopes, the existing technology involves time-consuming and labor-intensive transportation and setup of hoisting platforms, resulting in low installation efficiency.

Method used

A pipe structure including a connecting component and a supporting component was designed. The connecting component enables quick connection through a telescopic and flexible connecting pipe and a fixing component, while the supporting component enables convenient transportation and positioning through a hydraulic jack and a wheel set.

Benefits of technology

It enables rapid installation and convenient transportation of large-diameter pipelines on steep slopes, improving installation efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a large-diameter pipeline structure which is convenient and rapid to install on a steep slope section and belongs to the technical field of pipeline connection. The large-diameter pipeline structure which is convenient and rapid to install on a steep slope section comprises a pipeline, a plurality of supporting assemblies, a plurality of wheel groups and a plurality of connecting assemblies, the pipeline is a multi-section pipeline, the connecting assemblies are detachably installed at two ends of the pipeline, the connecting assemblies comprise connecting pipes and fixing assemblies, the connecting pipes are arranged to be bendable, the fixing assemblies are used for fixing the connecting pipes after the connecting pipes are bent, and the wheel groups are used for transporting the pipeline in cooperation with the supporting assemblies. In this way, the pipeline structure is convenient to transport and convenient to install.
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Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of pipeline connection, and more particularly to a large-diameter pipeline structure which is convenient and fast to install on a steep slope. BACKGROUND

[0002] With the development needs of national economic construction, water diversion projects are built to regulate water resource shortage and uneven time and space distribution; with the continuous expansion of water conservancy projects, more and more water diversion projects are applied to practice, especially the installation of large-diameter water conveying pipelines in the construction of complex terrain and geology.

[0003] In the prior art, when installing a large-diameter pipeline on a steep slope, the two ends of the pipeline to be bent are first bent by heat bending, and multiple sections of the pipeline are connected together by welding, and then the processed pipeline is placed on the preset position by a large hoisting platform, but on the steep slope, the transportation and erection of the hoisting platform are time-consuming and labor-consuming, SUMMARY

[0004] The technical problem to be solved by the present application is to provide a large-diameter pipeline structure which is convenient and fast to install on a steep slope, which can realize the fast installation of a large-diameter pipeline on a steep slope.

[0005] The large-diameter pipeline structure which is convenient and fast to install on a steep slope comprises a pipeline and a plurality of connecting assemblies, the pipeline is a plurality of sections of pipeline, both ends of the pipeline are provided with step layers respectively, and both ends of the connecting assembly are detachably installed with the pipeline.

[0006] The connecting assembly comprises a connecting pipe and a fixing assembly, the connecting pipe is a telescopic and bendable pipeline, both end inner walls of the connecting pipe are respectively provided with step layers, the step layers are matched with the step layers, and the step layers are in abutment with the step layers.

[0007] The fixing assembly comprises a first telescopic rod, three seat sleeves, two first sliding rods, two second sliding rods and two third sliding rods, one end of the first telescopic rod is fixedly installed on the connecting pipe, the other end is fixedly provided with a limiting block, one end of the first sliding rod is respectively slidably installed on both sides of the corresponding seat sleeve, the other end is respectively fixedly installed on the left and right sides of the connecting pipe, one end of the second sliding rod is respectively slidably installed on both sides of the corresponding seat sleeve, the other end is respectively fixedly installed on the left and right sides of the connecting pipe, one end of the third sliding rod is respectively slidably installed on both sides of the corresponding seat sleeve, the other end is respectively slidably installed on the corresponding second sliding rod, and the seat sleeve is sleeved on the first telescopic rod.

[0008] As a further improvement of the present application, a third telescopic rod is fixedly arranged between the first sliding rod and the second sliding rod on the left side of the connecting pipe; a second telescopic rod is fixedly arranged between the first sliding rod and the second sliding rod on the right side of the connecting pipe; the third telescopic rod and the second telescopic rod respectively support the corresponding first sliding rod and second sliding rod apart and are fixed.

[0009] As a further improvement of the present application, the step layers on the two ends of the pipe have diameters that increase in turn from the outside to the inside of the pipe, and are respectively a first step, a second step and a third step; a first sealing groove is arranged between the first step and the second step, and the first sealing groove is arranged in a concave manner along the outer periphery of the bottom of the second step; a second sealing groove is arranged between the second step and the third step, and the second sealing groove is arranged in a concave manner along the outer periphery of the bottom of the third step; a sealing ring of a corresponding size is respectively installed in the first sealing groove and the second sealing groove.

[0010] As a further improvement of the present application, a limiting seat is fixedly arranged at the two ends of the connecting pipe, and the outer periphery diameter of the limiting seat is greater than the outer periphery diameter of the connecting pipe; the side of the limiting seat away from the connecting pipe faces outward as a limiting surface; the limiting surface abuts against the first step.

[0011] As a further improvement of the present application, the step layers on the inner side walls of the two ends of the connecting pipe have diameters that decrease in turn from the outside to the inside of the connecting pipe; the step layers are in turn a first step and a second step; the first step abuts against the second step; and the second step abuts against the third step.

[0012] As a further improvement of the present application, a support assembly is further included; the support assembly includes a fixed ring, a support seat and a fixed seat, the support seat is fixedly arranged at the upper end of the fixed seat; the fixed ring is composed of a lower fixed ring and an upper fixed ring; the lower fixed ring is embedded on the upper end of the support seat; the upper surface of the lower fixed ring is flush with the upper surface of the support seat; the upper fixed ring is provided with a mounting table on each side; the mounting table and the upper surface of the support seat on the left and right sides of the lower fixed ring abut and are fixed by bolts; the lower fixed ring and the upper fixed ring are semicircular ring structures; and the diameter of the fixed ring matches the outer periphery diameter of the pipe.

[0013] As a further improvement of the present application, a buffer structure matching the shape of the fixed ring is fixedly arranged on the inner wall of the fixed ring; the buffer structure abuts against the outer periphery of the pipe; the buffer structure is made of leather material, which has elasticity and adsorption.

[0014] As a further improvement of the present application, a wheel set is further included; the wheel set comprises a fixed rod, a fixed block and an axle; the axle is a cylinder; the upper end of the fixed rod is fixedly connected with the lower end of the fixed block, and the lower end of the fixed rod is fixedly connected with the middle part of the axle; the axle and the fixed rod are in a "T" shape; the two ends of the axle are slidingly installed with tires; the outer periphery of the fixed rod is fixedly connected with a support on each side, and the supports are arranged at an angle; the two supports are arranged perpendicularly to the axle; the top end of the support is provided with an "L" shaped seat; the seat abuts against the fixed seat.

[0015] As a further improvement of the present application, the left and right sides of the lower end of the fixed seat are respectively fixedly provided with hydraulic jacks; two fixed holes are formed between the two hydraulic jacks at the bottom of the fixed seat; the two fixed holes are arranged between the two hydraulic jacks; the upper end of the fixed block at the top of the wheel set is detachably installed in the fixed hole.

[0016] As a further improvement of the present application, the tire is in a gear shape.

[0017] Compared with the prior art, the present application has the beneficial effects that the large-diameter pipeline structure provided with a connecting assembly and a supporting assembly is convenient and fast to install on a steep slope; the connecting assembly enables the large-diameter pipeline structure to be conveniently bent and fixed; the supporting assembly enables the large-diameter pipeline structure to be conveniently transported; and the whole installation process is more convenient and fast. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic view of a partial structure of the pipeline of the present application;

[0019] Figure 2 is a schematic view of a cross-sectional structure of the pipeline of the present application;

[0020] Figure 3 is a schematic view of a structure of the supporting assembly of the present application;

[0021] Figure 4 is a schematic view of a structure of the supporting assembly of the present application;

[0022] Figure 5 is a schematic view of a structure of the pipeline of the present application;

[0023] Figure 6 is a schematic view of a structure of the connecting pipe of the present application;

[0024] Figure 7 is a schematic view of a structure of the fixed assembly of the present application;

[0025] Figure 8 is a schematic view of a structure of the wheel set of the present application.

[0026] Explanation of reference numerals in the drawings:

[0027] 1, pipe; 11, first sealing groove; 12, first step; 13, second step; 14, third step; 15, second sealing groove; 2, connecting assembly; 21, connecting pipe; 212, first step; 213, second step; 22, fixing bolt; 23, fixing assembly; 231, first sliding rod; 232, second sliding rod; 233, third sliding rod; 234, first telescopic rod; 235, second telescopic rod; 236, third telescopic rod; 237, limiting block; 238, seat sleeve; 24, limiting seat; 241, limiting surface; 3, supporting assembly; 31, pressing mechanism; 32, valve; 33, hydraulic cylinder; 34, fixing seat; 35, base; 351, through hole; 36, large piston; 37, supporting seat; 38, fixing ring; 381, lower fixing ring; 382, upper fixing ring; 39, fixing hole; 310, buffer structure; 311, supporting disc; 312, small piston; 4, wheel set; 41, fixing rod; 42, support; 43, fixing block; 44, tire; 45, axle; 5, sealing ring. Embodiment

[0028] The application will be further described in conjunction with the following examples. The following examples are used to explain the application, but the application is not limited to the following examples.

[0029] Specific embodiment one: please refer to Figures 1-8 A large-diameter pipe structure that is convenient and fast to install on steep slope sections, comprising a plurality of pipes 1, a plurality of connecting assemblies 2, a plurality of supporting assemblies 3, and a plurality of wheel sets 4; the pipes 1 are multiple-section pipes; the connecting assemblies 2 are detachably installed at both ends of the pipes 1.

[0030] Both ends of the pipe 1 are respectively provided with step layers, as shown in Figure 5 The step layers at the upper end of the pipe 1 have diameters that increase in turn, and are respectively a first step 12, a second step 13, and a third step 14; a first sealing groove 11 is arranged between the first step 12 and the second step 13, and the first sealing groove 11 is arranged in a concave manner along the outer periphery of the bottom of the second step 13; a second sealing groove 15 is arranged between the second step 13 and the third step 14, and the second sealing groove 15 is arranged in a concave manner along the outer periphery of the bottom of the third step 14; a sealing ring 5 of a corresponding size is respectively installed in the first sealing groove 11 and the second sealing groove 15.

[0031] As shown in Figure 5 A plurality of first fixing holes are arranged through the upper surface to the lower surface of the first step 12; the first fixing holes are arranged in an equidistant interval along the circumferential direction of the first step 12.

[0032] The connecting assembly 2 includes a connecting pipe 21 and several fixing bolts 22; the connecting pipe 21 is a telescopic and bendable pipe; both ends of the connecting pipe 21 are fixedly provided with limiting seats 24, the outer diameter of the limiting seats 24 is larger than the outer diameter of the connecting pipe 21; the side of the limiting seat 24 away from the connecting pipe 21 and facing outward is a limiting surface 241; several second fixing holes are opened through the surface of the limiting surface 241 throughout the limiting seat 24, and the second fixing holes are arranged at equal intervals along the circumference of the limiting seat.

[0033] Preferably, the number of the first fixing hole and the number of the second fixing hole are the same.

[0034] The inner walls at both ends of the connecting pipe 21 are respectively provided with stepped layers, such as... Figure 6 As shown, the diameter of the stepped layers at the upper end of the connecting pipe 21 decreases sequentially; the stepped layers are the first step 212 and the second step 213 in sequence.

[0035] Both ends of the pipe 1 are installed and connected to the connecting component 2. The first step 212 abuts against the second step 13; the second step 213 abuts against the third step 14; the limiting surface 241 abuts against the first step 12; the first fixing hole and the second fixing hole are arranged to overlap; the fixing bolt 22 passes through the corresponding first fixing hole and the second fixing hole to fasten the pipe 1 and the connecting component 2.

[0036] The connecting assembly 2 further includes a fixing assembly 23; the fixing assembly 23 includes a first telescopic rod 234, three seat sleeves 238, two first sliding rods 231, two second sliding rods 232, and two third sliding rods 233; as shown Figure 7 As shown, the upper end of the first telescopic rod 234 is fixedly connected to the connecting pipe 21; the lower end of the first telescopic rod is fixedly provided with a limit block 237; the telescopic rod 237 can reciprocate by extending and retracting along its vertical direction; three seat sleeves 238 are respectively slidably sleeved on the first telescopic rod 231; the three seat sleeves 238 are arranged sequentially in the vertical direction of the first telescopic rod 231.

[0037] like Figure 7As shown, one end of the first sliding rod 231 is slidingly installed on the outer circumferential left end of the seat sleeve 238 near the limiting block 237, and the other end of the first sliding rod is fixedly installed on the outer circumferential left end of the connecting pipe 21; one end of the other first sliding rod 231 is slidingly installed on the outer circumferential right end of the seat sleeve 238 near the limiting block 237, and the other end of the first sliding rod is fixedly installed on the outer circumferential right end of the connecting pipe 21; the two first sliding rods 231 are respectively located on the left and right sides of the seat sleeve 238; one end of the second sliding rod 232 is slidingly installed on the outer circumferential left end of the seat sleeve 238 located in the middle of the three seat sleeves 238, and the other end of the second sliding rod 232 is slidingly installed on the outer circumferential left end of the connecting pipe 21; one end of the other second sliding rod 232 is slidingly installed on the outer circumferential right end of the seat sleeve 238 located in the middle of the three seat sleeves 238, and the other end of the second sliding rod 232 is slidingly installed on the outer circumferential right end of the connecting pipe 21; the two second sliding rods 232 are respectively located on the left and right sides of the seat sleeve 238; one end of the third sliding rod 233 is slidingly installed on the outer circumferential left end of the seat sleeve 238 near the connecting pipe 21, and the other end of the third sliding rod 233 is slidingly installed on the second sliding rod 232 on the left side of the seat sleeve 238; one end of the other third sliding rod 233 is slidingly installed on the outer circumferential right end of the seat sleeve 238 near the connecting pipe 21, and the other end of the third sliding rod 233 is slidingly installed on the other second sliding rod 232 on the right side of the seat sleeve 238; the first sliding rod 231 and the second sliding rod 232 on the left side of the seat sleeve 238 are fixedly provided with the third telescopic rod 236; the first sliding rod 231 and the second sliding rod 232 on the right side of the seat sleeve 238 are fixedly provided with the second telescopic rod 235.

[0038] As shown, Figure 7 the seat sleeve 238 and the two sliding rods are located on the same horizontal plane, and the seat sleeve 238 is provided with limiting members on the upper and lower sides perpendicular to the horizontal plane; when the connecting pipe 21 is set to a predetermined position, the fixed assembly is positioned, and the limiting members are used to fix the fixed assembly as a whole.

[0039] The support assembly 3 comprises a fixed ring 38, a support seat 37 and a fixed seat 34, the support seat 37 is fixedly arranged at the upper end of the fixed seat 34; the fixed ring 38 is composed of a lower fixed ring 381 and an upper fixed ring 382; the lower fixed ring 381 is embedded on the upper end of the support seat 37; the upper surface of the lower fixed ring 381 is flush with the upper surface of the support seat 37; the upper fixed ring 382 is provided with a mounting table on both sides; the mounting table and the upper surface of the support seat 37 on both sides of the lower fixed ring 381 abut and are fixed by bolts; the lower fixed ring 381 and the upper fixed ring 382 are semicircular ring structures; a buffer structure 310 matched with the shape is fixedly arranged on the inner wall of the fixed ring 38; the buffer structure 310 abuts against the outer periphery of the pipeline 1; preferably, the buffer structure 310 is made of leather material, which has elasticity and adsorption; the diameter of the fixed ring 38 matches the outer diameter of the pipeline 1.

[0040] As shown in Figure 3 The front and rear sides of the fixed seat 34 are respectively provided with two second fixed holes; the left and right sides of the lower end of the fixed seat 34 are respectively fixedly provided with hydraulic jacks; the hydraulic jack comprises a pressing mechanism 31, a valve 32, a base 35, a hydraulic cylinder 33, a large piston 36, a small piston 312 and a support disc 311; the top of the support disc 311 is fixedly installed with the bottom of the fixed seat; the bottom of the support disc 311 is fixedly installed with the top of the large piston 36, and the lower end of the large piston 36 is slidingly arranged through the upper end of the hydraulic cylinder 33; the lower end of the hydraulic cylinder 33 is fixedly installed on the upper surface of the base 35; the inside of the hydraulic cylinder 33 and the base 35 is a through cavity, and hydraulic oil is arranged in the cavity; the lower end of the pressing mechanism 31 is fixedly installed on the upper end of the small piston 312; the lower end of the small piston 312 is slidingly arranged through the upper surface of the base 35, and the valve 32 is slidingly arranged through the side surface of the base 35; the internal structure of the hydraulic jack and its working principle are common knowledge, and will not be described in detail here.

[0041] Press the pressing mechanism 31, so that the large piston 36 is lifted; open the valve 32, so that the large piston 36 is lowered.

[0042] Two fixed holes 39 are arranged between the two hydraulic jacks at the bottom of the fixed seat 34; the two fixed holes 39 are arranged between the two hydraulic jacks.

[0043] As shown in Figure 8The wheel set 4 comprises a fixed rod 41, a fixed block 43 and an axle 45; the axle 45 is a cylinder; the upper end of the fixed rod 41 is fixedly connected with the lower end of the fixed block 43, and the lower end of the fixed rod 41 is fixedly connected with the middle part of the axle 45; the axle 45 and the fixed rod 41 are in "T" shape; the two ends of the axle are slidably installed with tires 44; the outer periphery of the fixed rod 41 is fixedly connected with supports 42 on both sides in an angle, and the two supports 42 are vertically arranged with the axle 45; the top end of the support 42 is provided with an "L"-shaped seat, and a hole is formed in the side wall of the seat; the upper end of the fixed block 43 is detachably installed in the fixed hole 39, the seat abuts against the fixed seat 34, and the hole coincides with the second fixed hole; the seat and the fixed seat 34 are detachably connected by bolts; the hole and the second fixed hole are provided with threads, and the detachable connection is a threaded connection.

[0044] Preferably, the tire 44 is in gear shape, and the teeth on the gear-shaped tire can well act on the soil to increase the grip force, so that the large-diameter pipeline can be transported to the destination more quickly and stably.

[0045] Working principle:

[0046] The multi-section pipeline 1 is installed and connected through the connecting assembly 2; the supporting assembly 2 is sleeved on the outside of the pipeline 1; after the assembled large-diameter pipeline is lifted by the hydraulic jack, the wheel set 4 is installed; after the wheel set 4 is installed, the valve is opened, the large piston falls back, and the base 35 is separated from the ground; at this time, the worker can pull the large-diameter pipeline to the predetermined installation position, then lift the large piston again, and remove the wheel set 4; the connecting assembly is placed at the position where the slope needs to be bent; the connecting pipe 21 is manually bent, and the first sliding rod 231, the second sliding rod 232 and the third sliding rod 233 are slid and fixed, so that the bent shape of the connecting pipe 21 is fixed.

[0047] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto; any person skilled in the art can make equivalent replacements or changes to the technical scheme and the improved concept of the present application within the technical range disclosed by the present application, which should be covered by the protection scope of the present application.

Claims

1. A large-diameter pipe structure that is convenient and quick to install on steep slopes, characterized in that: The utility model provides a kind of pipe system, including pipe (1), several connecting assemblies (2), support assembly (3) and wheel group (4), the pipe (1) is multi-section pipe;Two ends of pipe (1) are provided with step layer respectively;The two ends of connecting assembly (2) are detachably installed with pipe (1); The connecting assembly (2) includes connecting pipe (21) and fixed assembly (23);The connecting pipe (21) is telescopic and curved pipe;Two ends of connecting pipe (21) are provided with step layer on inner side wall respectively;The step layer is matched with step layer;The step layer is abutted with the step layer; Fixed assembly (23) includes first telescopic rod (234), three seat sleeves (238), two first sliding rods (231), two second sliding rods (232) and two third sliding rods (233);One end of first telescopic rod (234) is fixedly installed in connecting pipe (21), and the other end is fixedly provided with limit block (237);One end of first sliding rod (231) is slidably installed on the two sides of corresponding seat sleeve (238) respectively, and the other end is fixedly installed on the left and right sides of connecting pipe (21) respectively;One end of second sliding rod (232) is slidably installed on the two sides of corresponding seat sleeve (238) respectively, and the other end is fixedly installed on the left and right sides of connecting pipe (21) respectively;One end of third sliding rod (233) is slidably installed on the two sides of corresponding seat sleeve (238) respectively, and the other end is slidably installed on corresponding second sliding rod (232);The seat sleeve (238) is sleeved on the first telescopic rod (234); The support assembly (3) includes fixed ring (38), support seat (37) and fixed seat (34), and the support seat (37) is fixedly arranged on the upper end of the fixed seat (34);The fixed ring (38) is composed of lower fixed ring (381) and upper fixed ring (382);The lower fixed ring (381) is embedded on the upper end of the support seat (37);The upper surface of the lower fixed ring (381) is flush with the upper surface of the support seat (37);The two sides of the upper fixed ring (382) are respectively provided with mounting table;The mounting table and the upper surface of the support seat (37) on the left and right sides of the lower fixed ring (381) are abutted and fixed by bolts;The lower fixed ring (381) and the upper fixed ring (382) are semicircular ring structures;The diameter of the fixed ring (38) matches the outer diameter of the pipe (1); The left and right sides of the lower end of the fixed seat (34) are respectively fixedly provided with hydraulic jack;Two fixed holes (39) are arranged between the two hydraulic jacks on the bottom of the fixed seat (34);Two fixed holes (39) are arranged between the two hydraulic jacks in interval;The upper end of the fixed block (43) on the top of the wheel group (4) is detachably installed in the fixed hole (39).

2. The large-diameter pipe structure according to claim 1, wherein: The third telescopic rod (236) and the second telescopic rod (235) respectively support the corresponding first sliding rod (231) and the second sliding rod (232) and are fixed.

3. The large-diameter pipe structure according to claim 1, wherein: The step layer diameter of the two ends of the pipeline (1) increases from outside to inside in sequence, and is respectively a first step (12), a second step (13) and a third step (14); a first sealing groove (11) is arranged between the first step (12) and the second step (13), and the first sealing groove (11) is arranged in a concave manner along the outer periphery of the bottom of the second step (13); a second sealing groove (15) is arranged between the second step (13) and the third step (14), and the second sealing groove (15) is arranged in a concave manner along the outer periphery of the bottom of the third step (14); the first sealing groove (11) and the second sealing groove (15) are respectively provided with sealing rings (5) of corresponding sizes.

4. The large-diameter pipe structure according to claim 3, wherein: The two ends of the connecting pipe (21) are fixedly provided with limit seats (24), the outer periphery diameter of the limit seat (24) is greater than the outer periphery diameter of the connecting pipe (21); the side of the limit seat (24) away from the connecting pipe (21) faces outward and is a limit surface (241); the limit surface (241) abuts against the first step (12).

5. The large-diameter pipe structure according to claim 3, wherein: The step layer diameter of the inner side wall of the two ends of the connecting pipe (21) decreases from outside to inside in sequence; the step layer is sequentially a first step (212) and a second step (213); the first step (212) abuts against the second step (13); the second step (213) abuts against the third step (14).

6. The large-diameter pipe structure according to claim 1, wherein: The inner wall of the fixed ring (38) is fixedly provided with a buffer structure (310) matched with the shape; the buffer structure (310) abuts against the outer periphery of the pipeline (1); the buffer structure (310) is made of leather material, which is elastic and has adsorption property.

7. The large-diameter pipe structure according to claim 1, wherein: The wheel set (4) comprises a fixed rod (41), a fixed block (43) and a wheel shaft (45); the wheel shaft (45) is a cylinder; the upper end of the fixed rod (41) is fixedly connected with the lower end of the fixed block (43), and the lower end of the fixed rod (41) is fixedly connected with the middle part of the wheel shaft (45); the wheel shaft (45) and the fixed rod (41) are in "T" shape; the two ends of the wheel shaft are slidably provided with tires (44); the outer periphery of the fixed rod (41) is fixedly connected with supports (42) on both sides at an angle; the two supports (42) are vertically arranged with the wheel shaft (45); the top end of the support (42) is provided with an "L" shaped seat; the seat abuts against the fixed seat (34).

8. The large-diameter pipe structure according to claim 7, wherein: The tire (44) is in gear shape.

Citation Information

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