Pipeline carrying device for municipal engineering construction

Abstract

The invention provides a pipeline carrying device for municipal engineering construction, and relates to the field of municipal engineering pipeline carrying, the pipeline carrying device comprises a frame, two symmetrically distributed motors are mounted on the frame, an output shaft of each motor is in key connection with a two-way screw rod, each two-way screw rod is provided with a clamping assembly with the interval controlled to be adjusted, and the clamping assemblies are arranged on the frame. By adjusting and controlling the clamping assembly, rapid adaptation and stable clamping of pipelines with different outer diameters are achieved, and therefore the universality and operation flexibility of equipment are improved, and the operation requirement for frequent pipe diameter replacement in urban pipe network construction is met.

Description

Technical Field

[0001] The present invention relates to the technical field of municipal engineering pipeline transportation, and in particular to a pipeline transportation device used in municipal engineering construction. Background Art

[0002] In municipal engineering, pipelines refer to structural systems laid under or above public land such as urban roads, bridges, and tunnels, used to transport various media (such as water, gas, electricity, signals, etc.). Municipal pipelines are usually classified according to their transport media and functions, mainly including: water pipes, gas pipes, heat pipes, power pipes, communication pipes, etc. Among them, water pipes are divided into ductile iron pipes, steel pipes, PE pipes (polyethylene), and PCCP pipes (prestressed concrete cylinder pipes) according to their materials.

[0003] Polyethylene (PE) pipes have been widely used in urban water supply systems due to their excellent hygienic properties, outstanding chemical corrosion resistance and good pressure-bearing capacity. They cover multiple fields such as residential water supply, industrial production water and public fire-fighting water, and have become a key pipe material in the construction of modern municipal pipeline networks.

[0004] Traditional pipe handling devices for polyethylene (PE) pipes typically utilize a fixed-size clamping structure, with a clamping head acting on the pipe's outer wall. These devices are rigid, have a limited clamping range, and are only suitable for pipes of a specific diameter. This makes them difficult to adapt to the diverse specifications and diameters of PE pipes commonly found in municipal engineering projects. Consequently, multiple sets of specialized equipment are required during construction, resulting in wasted resources, complex management, and low operational efficiency.

[0005] Based on the above problems, there is an urgent need to provide a pipe handling device for municipal engineering construction, which can achieve rapid adaptation and stable clamping of pipes with different outer diameters through an adjustable clamping head, thereby improving the versatility and operational flexibility of the equipment and meeting the operational needs of frequent changes in pipe diameters in urban pipeline construction. Summary of the Invention

[0006] In response to the problems raised in the background art, the present invention provides a pipeline transporting device for municipal engineering construction to solve the problems. The present invention will be further elaborated below.

[0007] A pipe handling device for municipal engineering construction includes a frame on which two symmetrically distributed motors are mounted. The output shaft of each motor is keyed to a bidirectional screw rod, and each bidirectional screw rod is provided with a clamping assembly with a controlled adjustable spacing.

[0008] Preferably, each of the bidirectional screw rods is threadedly connected to two symmetrically distributed moving frames, each of the moving frames is embedded with a sliding frame, the bottom end of each sliding frame passes through the frame structure of the frame and extends downward, and the two sliding frames are arranged opposite each other, and the bottom end of each sliding frame is slidably connected to a moving block, and a compression spring is compressed between the moving block and the adjacent sliding frame, and the two moving blocks on the same side are fixed with an adaptively expandable clamping head on the side close to each other, and the pipe is clamped by the clamping head.

[0009] Preferably, an airbag is provided on one side of the clamping head, and an air cylinder corresponding to the clamping head is installed on the frame. Each air cylinder is connected to the corresponding airbag through an air pipe. A piston rod is slidably connected inside each air cylinder. A bracket is fixedly connected to the sliding frame. The bracket is fixedly connected to the adjacent piston rod, and the gap between the clamping interfaces is effectively filled through the expansion of the airbag.

[0010] Preferably, the gas cylinder is provided with an automatic pressure relief valve, which has a built-in pressure sensing element to achieve overpressure protection.

[0011] Preferably, the top surface of the frame is fixed with a wedge block corresponding to the bidirectional screw rod one by one, and the wedge block is provided with symmetrically distributed inclined guide surfaces. Each side wall of the sliding frame is fixed with an extrusion rod, which is squeezed and matched with the adjacent wedge block to achieve automatic lifting of the pipeline in the clamping state, which is convenient for subsequent overall transportation.

[0012] Preferably, two symmetrically distributed support frames are fixedly connected to the top surface of the frame, and a threaded column is connected to the support frame, on which multiple threaded channels are processed. Two symmetrically distributed rotating wheels are keyed to the threaded column, and a torsion spring is provided between each rotating wheel and the support frame. A pull rope is wound around the two rotating wheels on the same side, and a supporting member is provided in the middle of the pull rope. The ends of the movable frame are fixed with threaded sleeves to achieve tightening of the pull rope.

[0013] Preferably, two parallel rotating shafts are connected to the bottom of the frame, the left end of each rotating shaft is connected to a lifting claw, and the right end of each rotating shaft is keyed to gear 2. Gear 1 is connected to the frame through a connecting column, and two through grooves matching the contour of gear 1 are opened on the frame. Gear 1 passes through the adjacent through grooves and meshes with the corresponding gear 2. A mounting bracket is fixed to the rear side of each mobile frame, and a rack is fixed to the bottom of the mounting bracket, so as to realize efficient and smooth initial picking of pipes placed close to the ground.

[0014] Beneficial effects: Compared with the existing technology, this device can achieve rapid adaptation and stable clamping of pipes with different outer diameters through the cooperation of the clamping component and the airbag; through the cooperation of the sliding frame, extrusion rod and wedge block in the lifting component, the pipeline in the clamped state can be automatically lifted, which is convenient for subsequent overall transportation; through the cooperation of the pull rope, supporting part, threaded sleeve and threaded column, dynamic support is provided to the front and rear ends of the clamped pipeline, thereby improving the structural rigidity and operation stability during transportation; through the front picking component, it is used to lift the pipeline from the ground to the adaptation height before the clamping action, so that the front picking action takes precedence over the clamping action, which is convenient for the subsequent clamping action of the clamping component. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 : Schematic diagram of the three-dimensional structure of the present invention;

[0016] Figure 2 : Schematic diagram of the local structure of the present invention;

[0017] Figure 3 : A schematic structural diagram of the clamping assembly and other related components of the present invention;

[0018] Figure 4 : A schematic structural diagram of the lifting assembly and other related components of the present invention;

[0019] Figure 5 : A schematic structural diagram of the front pickup assembly and other related components of the present invention;

[0020] Figure 6 : Schematic diagram of the structure of gear 2, rotating shaft, and lifting claw of the present invention;

[0021] In the figure: 1-frame, 11-support frame, 12-motor, 13-bidirectional screw, 14-sliding frame, 141-extrusion rod, 15-moving frame, 2-moving block, 21-compression spring, 22-air bag, 23-air pipe, 24-air cylinder, 25-piston rod, 26-bracket, 27-wedge block, 28-clamping head, 3-supporting member, 31-pull rope, 32-rotating wheel, 33-torsion spring, 34-threaded sleeve, 35-threaded column, 4-mounting frame, 41-rack, 42-gear 1, 43-gear 2, 431-rotating shaft, 44-lifting claw. DETAILED DESCRIPTION

[0022] Next, combine Figures 1-6 A specific embodiment of the present invention is described in detail.

[0023] refer to Figure 1A pipe handling device for municipal engineering construction includes a movable frame 1, which serves as the load-bearing and operating platform of the whole machine and has good terrain passability and structural stability. Two symmetrically distributed motors 12 are installed on the frame 1. The two motors 12 are distributed on the left and right sides of the top surface of the frame 1 to provide independent and synchronous outputs. A bidirectional screw rod 13 is keyed to the output shaft of each motor 12, and each bidirectional screw rod 13 is provided with a clamping assembly with a controlled adjustable spacing. The execution end of the clamping assembly extends downward through the frame structure of the frame 1 and is arranged oppositely to form a vertical clamping force action path, which is used to stably hold and clamp polyethylene pipes of different outer diameters (hereinafter collectively referred to as: pipes).

[0024] refer to Figure 2 , Clamping assembly: Each of the bidirectional screw rods 13 is threadedly connected to two symmetrically distributed mobile racks 15, the mobile racks 15 are located on the top surface of the frame 1, and each of the mobile racks 15 is embedded with a sliding rack 14.

[0025] refer to Figure 3 The bottom end of each sliding frame 14 extends downward through the frame structure of the frame 1. The two sliding frames 14 are arranged opposite to each other. The bottom end of each sliding frame 14 is slidably connected with a moving block 2. A compression spring 21 is compressed between the moving block 2 and the adjacent sliding frame 14. The movement of the sliding frame 14 is transmitted to the moving block 2 through the compression spring 21. The two moving blocks 2 on the same side are fixed with an adaptively expandable clamping head 28 on the side close to each other. The two clamping heads 28 on the same side are arranged relative to each other to form a group of clamping units to clamp the pipe.

[0026] Initially, the sliding frame 14 is in the separated position, the compression spring 21 is relaxed, and the clamping head 28 is open. When the motor 12 starts and drives the bidirectional screw 13 to rotate, the two moving frames 15 and the two sliding frames 14 close inward, and the compression spring 21 gradually compresses, transmitting the displacement and pressure to the moving block 2, driving the clamping head 28 toward the side wall of the pipe and contacting it. After the clamping head 28 contacts the outer wall of the pipe, its adaptive expansion structure automatically conforms to the contour of the pipe, achieving flexible clamping and uniform force distribution for pipes of different diameters.

[0027] refer to Figure 3 In order to further improve the fit and clamping reliability of the clamping head 28 for pipes of different diameters, an airbag 22 is provided on the side of the clamping head 28 facing the pipe. The airbag 22 is made of highly elastic and wear-resistant rubber material and can undergo controllable deformation after inflation, effectively filling the local gap between the clamping head 28 and the outer wall of the pipe, achieving stress-free, full-contact clamping, significantly improving the clamping stability, and preventing the pipe from slipping or surface damage due to vibration or impact during transportation. In order to achieve automatic inflation of the airbag 22, this device performs the following linkage.

[0028] The frame 1 is equipped with air cylinders 24 corresponding to the clamping heads 28 one by one. Each air cylinder 24 is connected to the corresponding air bag 22 through an air pipe 23 to form a closed and airtight gas transmission path. A piston rod 25 is slidably connected to the inside of each air cylinder 24. The piston rod 25 extends outward from the air cylinder 24 to achieve reciprocating suction and compression.

[0029] The sliding frames 14 are all fixedly connected with brackets 26 , and the brackets 26 are fixedly connected to the adjacent piston rods 25 . The linear motion of the sliding frames 14 is synchronously transmitted to the piston rods 25 .

[0030] When the drive motor 12 is activated and the bidirectional screw 13 rotates, driving the movable frame 15 and the sliding frame 14 to move toward each other, the bracket 26 fixed thereto moves inward synchronously, thereby pulling the piston rod 25 to perform a compression stroke within the cylinder 24. This process pressurizes the gas in the cylinder 24 and directs it into the airbag 22 through the air pipe 23, achieving automatic inflation.

[0031] The compression spring 21 gradually compresses and stores energy, and the moving block 2 continuously applies thrust to the clamping head 28. When the clamping head 28 contacts the outer wall of the pipe, its axial movement is blocked and the rigid clamping force tends to stabilize. At this time, the displacement of the clamping head 28 is limited, but the sliding frame 14 continues to close inward under the continuous drive of the bidirectional screw 13. This movement is converted into further inflation pressure on the airbag 22, causing the airbag 22 to continue to expand.

[0032] The inflating airbag 22 generates uniform flexible radial pressure along the circumference of the pipe, adaptively fitting pipes of different diameters and surface contours, effectively filling the gaps between the clamping interfaces, eliminating the common point contact, line contact or local stress concentration phenomena in traditional rigid clamping, and ultimately forming a flexible clamping interface with full circumferential envelopment, equal pressure distribution, and seamless fit, significantly improving the clamping stability and pipe protection performance.

[0033] To prevent over-inflation or even rupture of the airbag 22 due to excessive inflation pressure, and to ensure safe operation of the device, the air cylinder 24 is equipped with an automatic pressure relief valve. This valve has a built-in pressure sensor and a preset safe operating pressure threshold. When the pressure within the air cylinder 24 exceeds the set value, the valve automatically opens, venting excess gas to the atmosphere, achieving rapid pressure reduction protection. This is prior art and will not be described in detail.

[0034] refer to Figure 3 and Figure 4Based on the above-mentioned clamping and fitting functions, this device is designed with a lifting component to realize automatic lifting of the pipe in the clamping state, which is convenient for subsequent overall transportation. Specifically, the top surface of the frame 1 is fixed with a wedge block 27 corresponding to the bidirectional screw rod 13. The wedge block 27 is provided with symmetrically distributed inclined guide surfaces to form a lifting drive inclined surface. Each side wall of the sliding frame 14 is fixed with an extrusion rod 141, which is squeezed and matched with the adjacent wedge block 27.

[0035] Motor 12 activates, rotating bidirectional screw 13 and driving the left and right moving frames 15 and slide 14 to move synchronously toward each other. During this process, the squeeze rod 141, affixed to the slide 14, moves with it and gradually presses into the inclined surface of wedge block 27. This inclined surface exerts a vertical upward force on the squeeze rod 141, pushing the entire slide 14 upward. The upward movement of the slide 14 is transmitted to the clamping head 28 via the movable block 2 attached to its base, causing the clamping head 28 and the pipe it holds to rise synchronously.

[0036] At the same time, the airbag 22 inside the clamping head 28 expands synchronously, ensuring a seamless and stable grip at the clamping interface throughout the lifting process, preventing loosening or unbalanced loading due to posture changes. As the sliding frame 14 continues to close inward and the extrusion rod 141 completely slides along the inclined surface of the wedge block 27 to the high platform, the pipe is lifted to the desired transport height. At this point, the clamping and lifting action is complete, and the operator can use external force to drive the mobile frame 1 to smoothly transport the entire device, including the clamped and lifted pipe, to the target installation location.

[0037] In order to achieve the overall stability of the device in the process of adapting to pipes of different lengths and preventing the pipes from sagging, swinging or becoming unbalanced due to the cantilever effect, the device is provided with a lifting component on the mobile frame 1, which is used to provide dynamic support for the front and rear ends of the clamped pipes, thereby improving the structural rigidity and operational stability during transportation.

[0038] refer to Figure 4 Specifically, the top surface of the frame 1 is fixed with two symmetrically distributed support frames 11, and the two support frames 11 are distributed on the front and rear sides of the frame 1 as the mounting base of the lifting assembly. The support frames 11 are connected with threaded columns 35, on which multiple threaded channels are processed for realizing spiral transmission. The threaded columns 35 are keyed to two symmetrically distributed runners 32, and a torsion spring 33 is provided between each runner 32 and the support frame 11. A pull rope 31 is wound around the two runners 32 on the same side. The middle section of the pull rope 31 is hung down, and the middle hanging section of the pull rope 31 is provided with a supporting member 3. The supporting member 3 is an arc-shaped support plate structure for fitting the outer wall of the pipe and providing bottom support. The ends of the mobile frame 15 are fixed with threaded sleeves 34, which cooperate with the corresponding threaded columns 35.

[0039] Before the pipe is loaded, the pull rope 31 is manually pulled to make the wheel 32 rotate forward against the torsion spring 33. The pull rope 31 is stretched and the supporting member 3 is lowered to the appropriate height. The front and rear ends of the pipe are placed on the two supporting members 3 to complete the initial positioning.

[0040] When the drive motor 12 is activated, the bidirectional screw 13 rotates, driving the left and right movable frames 15 to close together, performing the clamping operation. As the movable frames 15 move, the threaded sleeves 34 fixed to their ends move synchronously. When the sleeves 34 contact and engage the adjacent threaded studs 35, the studs 35 rotate in reverse, which in turn causes the key-connected wheel 32 to rotate in the same direction, reeling in the pull cord 31.

[0041] During this process, the pull rope 31 is gradually tightened, pulling the supporting member 3 upward and applying an upward lifting force to the end of the pipeline, effectively offsetting the flexural deformation caused by the pipeline's own weight. As the clamping head 28 completes the clamping and lifting of the middle part of the pipeline, the supporting member 3 simultaneously completes the lifting of the two ends, forming a three-point stable support system of "clamping in the middle and supporting at both ends", thereby improving the operational stability during pipeline transportation.

[0042] In order to achieve efficient and smooth initial picking of pipes placed close to the ground, the device is provided with a front picking assembly at the bottom of the mobile frame 1, which is used to lift the pipe from the ground to an appropriate height before the clamping action.

[0043] refer to Figure 5 and Figure 6 , front picking component: Two parallel rotating shafts 431 are connected at the bottom of the frame 1, and the rotating shafts 431 extend horizontally along the frame 1. The left end of each rotating shaft 431 is connected with a lifting claw 44. The lifting claw 44 is arc-shaped and is used to lift the bottom of the pipe. The two lifting claws 44 are staggered in the axial direction to avoid movement interference and achieve effective support for the pipe.

[0044] This forward picking action is achieved by the mutual rotation of the two lifting claws 44. Therefore, the right end of each rotating shaft 431 is keyed to gear 2 43, and the frame 1 is connected to gear 1 42 through a connecting column. The frame 1 is provided with two through grooves that match the contour of gear 1 42. Gear 1 42 passes through the adjacent through grooves and meshes with the corresponding gear 2 43. In order to realize the rotation of gear 1 42, the rear side of each of the mobile frames 15 is fixed with a mounting frame 4, and the bottom of the mounting frame 4 is fixed with a rack 41, which meshes with the adjacent gear 1 42 for transmission.

[0045] When the drive motor 12 is started, the bidirectional screw 13 rotates, driving the left and right side moving frames 15 to move axially toward each other. The mounting frame 4 fixed to the rear end of the moving frame 15 moves inward synchronously, and the rack 41 at its bottom moves accordingly and engages with gear 1 42, driving gear 1 42 to rotate around its rotating shaft 431. The rotation of gear 1 42 is transmitted to the corresponding gear 2 43 through its two side teeth, thereby driving the rotating shaft 431 to rotate. Because the two gears 2 43 are engaged with the corresponding gear 1 42, the two rotating shafts 431 rotate synchronously in opposite directions, so that the lifting claws 44 at both ends rotate upward in opposite directions. During the rotation process, the active end (lowest point) of the lifting claw 44 first contacts the ground pipe and gradually lifts it up, so that the entire pipe is lifted off the ground to a predetermined height. In particular, the active end of the lifting claw 44 is located below the clamping plane of the clamping head 28, so that the pre-pickup action takes precedence over the clamping action.

[0046] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A pipe handling device for municipal engineering construction, comprising a frame (1), on which two symmetrically distributed motors (12) are mounted, characterized in that: A bidirectional screw rod (13) is key-connected to the output shaft of each motor (12), and each bidirectional screw rod (13) is provided with a clamping assembly for controlled adjustment of the spacing.

2. The pipe handling device for municipal engineering construction according to claim 1, characterized in that: Each of the bidirectional screw rods (13) is threadedly connected to two symmetrically distributed moving frames (15), each of the moving frames (15) is embedded with a sliding frame (14), the bottom end of each sliding frame (14) passes through the frame structure of the vehicle frame (1) and extends downward, and the two sliding frames (14) are arranged opposite to each other, the bottom end of each sliding frame (14) is slidably connected to a moving block (2), a compression spring (21) is compressed between the moving block (2) and the adjacent sliding frame (14), and the two moving blocks (2) on the same side are fixed with a clamping head (28) that can be adaptively expanded on the side close to each other.

3. The pipe handling device for municipal engineering construction according to claim 2, characterized in that: An air bag (22) is provided on one side of the clamping head (28), and air cylinders (24) corresponding to the clamping heads (28) are installed on the vehicle frame (1). Each of the air cylinders (24) is connected to the corresponding air bag (22) through an air pipe (23), and a piston rod (25) is slidably connected inside each of the air cylinders (24). A bracket (26) is fixedly connected to the sliding frame (14), and the bracket (26) is fixedly connected to the adjacent piston rod (25).

4. The pipe handling device for municipal engineering construction according to claim 3, characterized in that: An automatic pressure relief valve is provided in the air cylinder (24), and the pressure relief valve has a built-in pressure sensing element.

5. The pipe handling device for municipal engineering construction according to claim 1, characterized in that: The top surface of the vehicle frame (1) is fixedly connected with a wedge block (27) corresponding to the bidirectional screw rod (13) one by one, and the wedge block (27) is provided with symmetrically distributed inclined guide surfaces. The side wall of each sliding frame (14) is fixedly connected with an extrusion rod (141), and the extrusion rod (141) is extruded and matched with the adjacent wedge block (27).

6. The pipe handling device for municipal engineering construction according to claim 5, characterized in that: The top surface of the vehicle frame (1) is fixedly connected to two symmetrically distributed support frames (11), the support frames (11) are connected to a threaded column (35), which is processed with multiple threaded channels, and the threaded column (35) is key-connected to two symmetrically distributed rotating wheels (32), each rotating wheel (32) is provided with a torsion spring (33) between the supporting frame (11), and a pull rope (31) is wound around the two rotating wheels (32) on the same side, and a supporting member (3) is provided in the middle of the pull rope (31), and the ends of the movable frame (15) are fixedly connected to threaded sleeves (34).

7. The pipe handling device for municipal engineering construction according to claim 6, characterized in that: The bottom of the vehicle frame (1) is connected to two parallel rotating shafts (431), the left end of each rotating shaft (431) is connected to a lifting claw (44), and the right end of each rotating shaft (431) is keyed to a gear 2 (43). The vehicle frame (1) is connected to a gear 1 (42) through a connecting column. The vehicle frame (1) is provided with two through slots matching the profile of the gear 1 (42). The gear 1 (42) passes through the adjacent through slots and meshes with the corresponding gear 2 (43). The rear side of each of the mobile frames (15) is fixedly connected to a mounting frame (4), and the bottom of the mounting frame (4) is fixedly connected to a rack (41).

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