Underground pipeline installation equipment and construction methods

Abstract

This invention discloses an underground pipeline installation device and its construction method. The underground pipeline installation device includes: a support frame, which is set on the ground and located on one side of the pit where the pipeline to be installed is located; multiple electric hoists, each of which is slidably mounted on the support frame along the longitudinal direction of the pit; and multiple clamping mechanisms, each electric hoist having one clamping mechanism corresponding to it, and each pipeline to be installed having two clamping mechanisms during installation. Each clamping mechanism is used to fit onto the circumferential side of the corresponding pipeline to be installed, and each clamping mechanism includes a fixing block and multiple clamping blocks. The underground pipeline installation device provided by this invention has a simple structure and low cost, and can quickly fix and connect pipelines. Before moving to the pit, it can move smoothly and safely on the ground, ensuring construction safety. After the pipeline is moved into the pit, the device can be easily and quickly removed from the pipeline, greatly improving construction efficiency.

Description

Technical Field

[0001] This invention relates to the field of pipeline installation and construction technology. More specifically, this invention relates to an underground pipeline installation device and its construction method. Background Technology

[0002] Underground drainage pipes are laid in pits to promptly discharge urban sewage and rainwater, ensuring the normal order of urban production and daily life. Currently, underground municipal drainage pipes are usually composed of multiple pipe units spliced ​​together. During the installation of underground pipes, the pipe units need to be hoisted and lowered into the pits. Existing technology typically uses hoisting equipment, with ropes tied to both ends of the pipes and connected to the hoisting components of the equipment before hoisting and lowering them into the pits. Due to the significant weight of the pipes, relying solely on ropes to connect them to the hoisting equipment cannot guarantee construction safety during the hoisting process. Furthermore, after the pipes are hoisted into the pits, welding the joints between adjacent pipes requires additional rotating tools to rotate the pipes and bring the joints to the top for easier welding. Summary of the Invention

[0003] One object of the present invention is to solve at least the above-mentioned problems and to provide at least the advantages that will be described later.

[0004] To achieve these objectives and other advantages according to the present invention, an underground pipeline installation device is provided, comprising:

[0005] A support frame, which is set on the ground and located on one side of the recess where the pipe is to be installed;

[0006] Multiple electric hoists are spaced apart on the support frame along the longitudinal direction of the recess, and each electric hoist is slidably mounted on the support frame along the longitudinal direction of the recess.

[0007] Multiple clamping mechanisms are provided, with one clamping mechanism corresponding to each electric hoist and two clamping mechanisms corresponding to each pipe to be installed during the installation process. Each clamping mechanism is used to fit around the circumferential side of the corresponding pipe to be installed. Each clamping mechanism includes:

[0008] The fixing block has a cubic structure. The center of the fixing block has a circular through hole for the pipe to be installed to pass through. The bottom of the fixing block has rollers, and the top has a lifting lug that connects to the hook of the corresponding electric hoist.

[0009] Multiple clamping blocks are spaced apart along the circumference between the inner wall of the through hole and the pipe to be installed. Each clamping block is an arc-shaped structure adapted to the circumferential side of the pipe to be installed. The convex surface of the clamping block at the bottom is connected to the inner wall of the through hole through a vertically set support seat. The convex surface of each of the remaining clamping blocks is connected to the inner wall of the through hole through a first telescopic rod, which extends and retracts radially along the pipe.

[0010] Preferably, in the underground pipeline installation device, each clamping mechanism further includes a sleeve disposed between the through hole and multiple clamping blocks. The sleeve is rotatably connected to the inner wall of the through hole via a bearing. One end of the first telescopic rod corresponding to each clamping block is connected to the inner wall of the sleeve, and the other end is connected to the convex surface of the corresponding clamping block.

[0011] Preferably, in the underground pipeline installation device, a ball bearing is rolled and embedded on the concave surface of the bottom clamping block, and an elastic rubber pad is applied to the concave surface of each of the remaining clamping blocks other than the bottom clamping block.

[0012] Preferably, in the underground pipeline installation device, each first telescopic rod is fitted with a first spring, one end of which is connected to the inner wall of the sleeve, and the other end extends radially and is connected to the convex surface of the clamping block.

[0013] Preferably, in the underground pipeline installation device, each first telescopic rod includes a first rod body and a second rod body that are slidably sleeved inside and outside. One end of the second rod body is fixedly connected to the inner wall of the sleeve. A first electromagnet is provided inside the second rod body. One end of the first rod body passes through the other end of the second rod body and is inserted into the interior of the second rod body. A first iron block adapted to the first electromagnet is provided. The other end of the first rod body is connected to the convex surface of the corresponding clamping block.

[0014] The first spring and the first electromagnet are configured as follows: When the first electromagnet is energized, the first iron block moves towards the sleeve under the attraction of the first electromagnet, thereby driving the clamping block to move towards the sleeve. The first telescopic rod shortens, the first spring is compressed, and the spatial size of the circular structure formed by the multiple clamping blocks is at its maximum. When the first electromagnet is de-energized, the first electromagnet releases its attraction to the first iron block. Under the action of the first spring, the first telescopic rod extends, pushing the clamping block away from the sleeve, and the spatial size of the circular structure formed by the multiple clamping blocks becomes smaller.

[0015] Preferably, in the underground pipeline installation device, the outer wall of the inner ring of the bearing is provided with a plurality of second telescopic rods. The second telescopic rod includes a fixed cylinder extending radially along the bearing and a limiting rod whose one end slides radially along the inner wall of the fixed cylinder. One end of the limiting rod is connected to the inner wall of the fixed cylinder through a second spring, and the other end of the limiting rod is provided with a second iron block. A second electromagnet adapted to the second iron block is provided on the inner wall of the outer ring of the bearing.

[0016] The second spring and the second electromagnet are configured such that when the second electromagnet is energized, the second iron block is attracted to the second electromagnet, and the inner and outer rings of the bearing are relatively fixed, thereby temporarily fixing the sleeve and the fixed block relative to each other; when the second electromagnet is de-energized, the second electromagnet releases its attraction to the second iron block, the inner and outer rings of the bearing are released from relative fixation, and the sleeve can rotate around the axis of the sleeve relative to the fixed block.

[0017] The present invention also provides a construction method for the underground pipeline installation device, comprising:

[0018] S1. Erect a support frame on one side of the pit where the pipe is to be installed, and install multiple electric hoists at intervals along the longitudinal direction of the pit on the support frame. Each electric hoist is slidably connected to the support frame along the longitudinal direction of the pit.

[0019] S2. Transport the pipe to be installed to the other side of the pipe pit, with the pipe axis extending longitudinally along the pit, and number the pipes from the pit longitudinally from number 1 to n.

[0020] S3. A pad is placed at the bottom near the middle of pipe 1 so that both ends of the pipe are suspended. A clamping mechanism is fitted at each end of pipe 1. Specifically, before each clamping mechanism is fitted onto the pipe, all first electromagnets and all second electromagnets are energized. The space of the circular structure formed by the multiple clamping blocks is larger than the pipe size. The square frame is pushed to the end of the pipe, so that the axis of the pipe and the axis of the sleeve are on the same line. The clamping mechanism is moved towards the pipe. The end of the pipe passes through the space of the circular structure formed by the multiple clamping blocks. Then, all first electromagnets are de-energized. Under the action of the first spring, the clamping blocks move towards the circumferential side of the pipe. The multiple clamping blocks abut against the circumferential side wall of the pipe.

[0021] S4. Connect the lifting lug on each fixed block fitted on each No. 1 pipe to the hook of an electric hoist. At this time, the electric hoist and the corresponding square frame are set in the same horizontal direction. Start the two electric hoists corresponding to No. 1 pipe and pull No. 1 pipe towards the pit to the top of the pit. Then start the electric hoist again and lower No. 1 pipe and the two clamping mechanisms on it into the pit.

[0022] S5. Repeat operations S2~S4 to move pipe 2 into the recess and connect the two adjacent ends of pipe 1 and pipe 2.

[0023] S6. Use an electric welding device to weld the joint between pipes 1 and 2. During the welding process, de-energize the second electromagnet to make the sleeve and the relatively fixed block rotate, thereby driving the pipe to rotate and rotating the joint between the two pipes to the working position.

[0024] S7. After the butt joint welding of pipes 1 and 2 is completed, the first electromagnet is energized, and the clamping blocks on pipes 1 and 2 release their clamping. Then, the clamping mechanisms on pipes 1 and 2 are moved longitudinally towards the rear end of the pit. The two clamping mechanisms on pipe 1 are moved to pipe 2, and the first electromagnet of the two clamping mechanisms is de-energized. The two clamping mechanisms clamp pipe 2. During the process of the two clamping mechanisms on pipe 1 moving towards the rear end of the pit, jacks are set at the front end and the bottom of the middle part of pipe 1 to lift pipe 1 and keep pipes 1 and 2 coaxial. The two clamping mechanisms on pipe 2 are moved to the installation position of pipe 3. The electric hoist is started to lift the two clamping mechanisms corresponding to pipe 3 to the height where the bottom of the fixed block is level with the ground. The clamping mechanisms are pulled laterally to the placement position of pipe 3.

[0025] S8. Repeat S3~S4 to place the two clamping mechanisms on pipe No. 3 and move pipe No. 3 into the recess. Repeat S6 to weld the joint between pipe No. 2 and pipe No. 3.

[0026] S9. Repeat S7~S8 to install pipes 4~n. After the pipes are installed, move the clamping mechanism to the rear end of the pit and lift it out of the pit. Remove the jack at the bottom of the pipe and lower the pipe into place.

[0027] The present invention has at least the following beneficial effects:

[0028] 1. The underground pipeline installation device provided by the present invention has a simple structure and low cost. It can quickly fix and connect pipelines. Before moving to the pit, it can move smoothly and safely on the ground, ensuring construction safety. After the pipeline is moved into the pit, the device can be easily and quickly removed from the pipeline, greatly improving construction efficiency.

[0029] 2. The present invention further includes a sleeve rotatably installed in the through hole of the fixed block via a bearing, and a clamping block is installed on the inner wall of the sleeve via a first telescopic rod. The sleeve can rotate relative to the fixed block around the pipe axis. When welding the joint of two pipes, the pipe can be rotated relative to the fixed block, and the annular joint can be rotated while welding. The part to be welded can be rotated to the top, which is convenient for welding operators to weld.

[0030] 3. By setting a first electromagnet, a first iron block, and a first spring, the present invention can realize the automatic clamping connection of multiple clamping blocks to the pipe and the automatic disassembly of the clamping mechanism from the pipe. The structure is simple and the operation is convenient.

[0031] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the underground pipeline installation device described in one technical solution of the present invention in the state of lateral pipeline pulling;

[0033] Figure 2 This is a schematic diagram of the underground pipeline installation device described in another technical solution of the present invention, showing the pipeline being pulled above the pit;

[0034] Figure 3 This is a schematic diagram of the underground pipeline installation device described in another technical solution of the present invention, showing the pipeline being lowered into the pit;

[0035] Figure 4 This is a schematic diagram of the clamping mechanism in another technical solution of the present invention;

[0036] Figure 5 for Figure 4 A magnified view of part A in the image;

[0037] Figure 6 for Figure 4 A magnified view of part B in the image;

[0038] Figure 7 This is a diagram showing the pipeline installation and construction status in another technical solution of the present invention;

[0039] Figure 8 for Figure 7 A magnified view of part C.

[0040] Explanation of reference numerals in the attached drawings: 1-Dent; 21-Base; 22-Support rod; 3-Electric hoist; 4-Clamping mechanism; 41-Fixing block; 411-Lifting lug; 412-Roller; 42-Clamping block; 43-First telescopic rod; 431-First rod body; 432-Second rod body; 433-First electromagnet; 434-First iron block; 44-First spring; 45-Sleeve; 46-Bearing; 461-Inner ring; 462-Outer ring; 47-Second telescopic rod; 471-Fixing cylinder; 472-Limiting rod; 473-Second spring; 474-Second iron block; 475-Second electromagnet; 5-Pipeline. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0042] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0043] It should be noted that, unless otherwise specified, the experimental methods described in the following implementation plan are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified.

[0044] In the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] like Figures 1-8 As shown, the present invention provides an underground pipeline installation device, which includes:

[0046] A support frame is provided on the ground and located on one side of the recess 1 where the pipe 5 is to be installed;

[0047] Multiple electric hoists 3 are arranged longitudinally on the support frame along the recess 1, and each electric hoist 3 is slidably arranged on the support frame along the longitudinal direction of the recess 1.

[0048] Multiple clamping mechanisms 4 are provided, with one clamping mechanism 4 corresponding to each electric hoist 3, and two clamping mechanisms 4 corresponding to each pipe 5 to be installed during the installation process. Each clamping mechanism 4 is used to fit around the circumferential side of the corresponding pipe 5 to be installed. Each clamping mechanism 4 includes:

[0049] The fixing block 41 has a cubic structure. The middle part of the fixing block 41 is provided with a circular through hole for the pipe 5 to be installed to pass through. The bottom of the fixing block 41 is provided with a roller 412, and the top is provided with a lifting lug 411 that is connected to the hook of the corresponding electric hoist 3.

[0050] Multiple clamping blocks 42 are spaced apart along the circumferential direction between the through hole and the pipe 5 to be installed. Each clamping block 42 is an arc-shaped structure adapted to the circumferential side of the pipe 5 to be installed. The convex surface of the clamping block at the bottom is connected to the inner wall of the through hole through a vertically set support seat. The convex surface of each remaining clamping block 42 is connected to the inner wall of the through hole through a first telescopic rod 43. The first telescopic rod 43 extends and retracts radially along the pipe 5.

[0051] In the above technical solution, the present invention provides an underground pipe 5 installation device for laying pipes 5 into an underground pit 1. It includes a support frame disposed on one side of the pit 1 where the pipe 5 is to be installed. The support frame includes a base 21 on the ground and a support rod 22 on the base 21. The support rod 22 is located above the pit 1. Multiple electric hoists 3 are arranged on the support rod 22 at longitudinal intervals along the pit 1 (the direction in which the pipe 5 is laid is longitudinal, and the direction perpendicular to the longitudinal direction is transverse). The main body of the electric hoist 3 slides along the longitudinal direction of the pit 1 on the support rod 22. A pair of clamping mechanisms 4 are provided corresponding to each pipe 5. The holding mechanism 4 is used to clamp and fix the circumferential side of the pipe 5. A clamping mechanism 4 is correspondingly provided on the circumferential side of each pipe 5 near both ends. Each clamping mechanism 4 includes a fixing block 41, which is a cubic structure. A through hole is provided in the middle of the fixing block 41 for the pipe 5 to pass through. Multiple rollers 412 are provided at the bottom of the fixing block 41, allowing the fixing block 41 to move in any direction on the ground. A lifting lug 411 is provided on the fixing block 41 for connecting to the hook of an electric hoist 3. Multiple clamping blocks 42 (exactly...) are provided between the inner wall of the through hole of the fixing block 41 and the circumferential side of the pipe 5. It is said that multiple clamping blocks 42 are spaced apart along the circumferential direction on the side wall of the through hole of the fixing block 41. The clamping block at the bottom is connected to the inner wall of the through hole through a vertically set support seat. The support seat with a rigid structure can provide load support for the pipe with a certain weight. Preferably, the support seat is set to be a structure that can be extended and retracted vertically to ensure that when the pipe is inserted between multiple clamping blocks, the axis of the pipe passes through the center of the through hole. Each remaining clamping block 42 is connected to the side wall of the through hole through a first telescopic rod 43. The first telescopic rod 43 extends and retracts radially along the pipe 5, thereby driving the clamping block 42 to move radially along the pipe 5. The clamping block 42 is circular with the pipe 5. The curved structure of the peripheral side is adapted, and the clamping block 42 can seal against the peripheral side of the pipe 5. The contact between multiple clamping blocks 42 and the peripheral side of the pipe 5 realizes the fixed connection between the clamping mechanism 4 and the pipe 5. The clamping mechanism 4 provided by the present invention can walk on the ground, which is convenient to move and facilitates quick installation and connection with the pipe 5. It is connected to the lifting lug 411 through the hook of the electric hoist. When the electric hoist 3 is started, the pipe 5 can be pulled on the ground to the vicinity of the pit 1. After adjusting the longitudinal position of the pipe 5, the pipe 5 is continued to the horizontal direction to the top of the pit 1. Then, under the action of the electric hoist 3, the pipe 5 is lowered into the pit 1.

[0052] The underground pipeline 5 installation device provided by this invention has a simple structure and low cost. It can be quickly and securely connected to the pipeline 5. Before being moved to the pit 1, it can be moved smoothly and safely on the ground, ensuring construction safety. After the pipeline 5 is moved into the pit 1, the device can be easily and quickly removed from the pipeline 5, greatly improving construction efficiency.

[0053] In actual construction, it is preferred to set four electric hoists 3, in pairs, i.e., two pairs of electric hoists 3 are set, and two pairs (four) of clamping mechanisms 4 are set accordingly. Each clamping mechanism 4 corresponds to one electric hoist 3. One pair of clamping mechanisms 4 fixes one pipe 5 and moves it into the pit 1 under the action of one pair of electric hoists 3. Then, the other pair of clamping mechanisms 4 fixes the next pipe 5 and moves it into the pit 1 under the action of the other pair of electric hoists 3, and the two pipes 5 are connected and welded at the joint. After the two pipes 5 are connected, the first telescopic rod 43 of one pair of clamping mechanisms 4 and the other pair of clamping mechanisms 4 are retracted, releasing the clamping fixation of one pair of clamping mechanisms 4 on the first pipe 5. The other pair of clamping mechanisms 4 then moves along the longitudinal direction of the pit 1 towards the rear end of the pit 1 (from front to back from the direction of pipe 5 laying, becoming the front and rear ends of the pit 1), so that the other pair of clamping mechanisms 4 disengages from the next pipe 5. One pair of clamping mechanisms 4 moves to the circumferential side of the next pipe 5. During this process, a jack can be set at the bottom of the first pipe 5 to prevent the first pipe 5 from falling to the bottom of the pit 1 under gravity when the clamping mechanism 4 is detached from the pipe 5, which would cause the next pipe 5 to tilt and affect the docking and welding operations of the next pipe 5 and the pipe 5 after that. Under the action of the electric hoist 3, the other pair of clamping mechanisms 4 is lifted from the pit 1 to the ground height. The construction workers then use the other pair of clamping mechanisms 4 to fix the next pipe 5 to the other side of the pit 1 (where the pipe 5 is placed) and move it into the pit 1 under the action of the electric hoist 3. The next pipe 5 is then docked and welded to the next pipe 5. The operation is repeated to complete the movement, lowering and installation of other pipes 5. After the last pipe 5 is installed, the two pairs of clamping mechanisms 4 are moved towards the rear end of the pit 1 to detach from the pipe 5, and under the action of the electric hoist 3, the two pairs of clamping mechanisms 4 are lifted from the pit 1 and removed.

[0054] In another technical solution, the underground pipeline installation device further includes a sleeve 45 for each clamping mechanism 4, which is disposed between the inner wall of the through hole and multiple clamping blocks 42. The sleeve 45 is rotatably connected to the inner wall of the through hole via a bearing 46. One end of the first telescopic rod 43 corresponding to each clamping block 42 is connected to the inner wall of the sleeve 45, and the other end is connected to the convex surface of the corresponding clamping block 42. Further, the present invention rotatably sets the sleeve 45 within the through hole of the fixing block 41 via a bearing 46. The clamping blocks 42 are disposed on the inner wall of the sleeve 45 via the first telescopic rod 43. The sleeve 45 can rotate relative to the fixing block 41 around the axis of the pipeline 5. When welding the butt joint of two pipelines 5, the pipeline 5 can be rotated relative to the fixing block 41 to rotate the part to be welded to the top, facilitating welding operations.

[0055] In another technical solution, the underground pipeline installation device has rolling balls embedded in the concave surface of the bottom clamping block, and elastic rubber pads are applied to the concave surfaces of each of the remaining clamping blocks 42. The rolling balls embedded in the concave surface of the bottom clamping block reduce the friction between the bottom of the pipeline and the concave surface of the bottom clamping block when the pipeline is inserted between multiple clamping blocks, facilitating rapid insertion of the pipeline into the clamping mechanism and improving work efficiency. The elastic rubber pads applied to the concave surfaces of the remaining clamping blocks 42 prevent direct hard contact between the clamping blocks 42 and the pipeline 5, avoiding frictional damage to the sidewalls of the pipeline 5, and also improve the clamping stability of the clamping blocks 42 on the side of the pipeline 5.

[0056] In another technical solution, the underground pipeline installation device includes a first spring 44 fitted on each first telescopic rod 43, one end of which is connected to the inner wall of the sleeve 45, and the other end extends radially and connects to the convex surface of the clamping block 42. The compression spring 44 fitted on the first telescopic rod 43 further improves the stability of the clamping block 42 in clamping and fixing the side of the pipeline 5.

[0057] In another technical solution, the underground pipeline installation device includes a first telescopic rod 43 comprising a first rod body 431 and a second rod body 432 that are slidably sleeved inside and outside. One end of the second rod body 432 is fixedly connected to the inner wall of the sleeve 45. A first electromagnet 433 is provided inside the second rod body 432. One end of the first rod body 431 passes through the second rod body 432 and the other end is inserted into the second rod body 432. A first iron block 434 adapted to the first electromagnet 433 is provided. The other end of the first rod body 431 is connected to the convex surface of the corresponding clamping block 42.

[0058] The first spring 44 and the first electromagnet 433 are configured such that when the first electromagnet 433 is energized, the first iron block 434 moves towards the sleeve 45 under the attraction of the first electromagnet 433, thereby driving the clamping block 42 to move towards the sleeve 45, the first telescopic rod 43 shortens, the first spring 44 is compressed, and the spatial size of the circular structure formed by the multiple clamping blocks 42 is at its maximum; when the first electromagnet 433 is de-energized, the first electromagnet 433 releases the attraction of the first iron block 434, and under the action of the first spring 44, the first telescopic rod 43 extends, pushing the clamping block 42 away from the sleeve 45, and the spatial size of the circular structure formed by the multiple clamping blocks 42 becomes smaller.

[0059] In the above technical solution, the present invention further discloses the implementation method of the extension and retraction of the first telescopic rod 43. Specifically, the first telescopic rod 43 is configured as an inner and outer first rod body 431 and a second rod body 432. One end of the second rod body 432 is fixedly connected to the inner wall of the sleeve 45, and the other end is slidably connected to one end of the first rod body 431 along the axial direction of the first telescopic rod 43. The other end of the first rod body 431 is connected to the convex surface of the clamping block 42. At the same time, a first electromagnet 433 is provided inside the second rod body 432 near one end. A first iron block 434 adapted to the first electromagnet 433 is provided at one end of the first rod body 431. When the first electromagnet 433 is energized, The first iron block 434 moves radially toward the sleeve 45 under the magnetic attraction of the first electromagnet 433, thereby causing the first telescopic rod 43 to retract and the first spring 44 to be compressed. The space size of the circular structure formed by the multiple clamping blocks 42 is at its maximum (greater than the diameter of the pipe 5). When the clamping mechanism 4 is moved to the circumferential side of the pipe 5, the first electromagnet 433 is de-energized, releasing the magnetic attraction force on the first iron block 434. Under the action of the first spring 44, the first telescopic rod 43 extends, moving the clamping block 42 radially toward the side of the pipe 5. The concave surface of the clamping block 42 seals against the side of the pipe 5, thereby clamping and fixing the pipe 5. By setting the first electromagnet 433, the first iron block 434, and the first spring 44, the automatic clamping connection of multiple clamping blocks 42 to the pipe 5 can be realized, and the clamping mechanism 4 can be automatically disassembled from the pipe 5. The structure is simple and the operation is convenient.

[0060] In another technical solution, the underground pipeline installation device has a plurality of second telescopic rods 47 on the outer wall of the inner ring 461 of the bearing 46. The second telescopic rod 47 includes a fixed cylinder 471 extending radially along the bearing 46 and a limiting rod 472 whose one end slides radially along the inner wall of the fixed cylinder 471 along the bearing 46. One end of the limiting rod 472 is connected to the inner wall of the fixed cylinder 471 through a second spring 473. The other end of the limiting rod 472 is provided with a second iron block 474. A second electromagnet 475 adapted to the second iron block 474 is provided on the inner wall of the outer ring 462 of the bearing 46.

[0061] The second spring 473 and the second electromagnet 475 are configured such that when the second electromagnet 475 is energized, the second iron block 474 is attracted to the second electromagnet 475, and the inner ring 461 and outer ring 462 of the bearing 46 are relatively fixed, thereby temporarily fixing the sleeve 45 and the fixing block 41 relative to each other; when the second electromagnet 475 is de-energized, the second electromagnet 475 releases its attraction to the second iron block 474, the inner ring 461 and outer ring 462 of the bearing 46 are released from relative fixation, and the sleeve 45 can rotate circumferentially around the axis of the sleeve 45 relative to the fixing block 41.

[0062] In the above technical solution, the present invention further provides a second telescopic rod 47 on the outer wall of the inner ring 461 of the bearing 46. Each second telescopic rod 47 includes a fixed cylinder 471 extending radially and a limiting rod 472. One end of the limiting rod 472 is connected to the inner wall of the fixed cylinder 471 through a second spring 473, and the other end is provided with a second iron block 474. A second electromagnet 475 corresponding to the second iron block 474 is arranged on the inner wall of the outer ring 462 of the bearing 46. When the second electromagnet 475 is energized, the second electromagnet 475 generates a magnetic attraction force on the second iron block 474, and the second iron block 474 is attracted to the second electromagnet 475. That is, the second telescopic rod 47 temporarily fixes the inner ring 461 and the outer ring 462. 62 cannot rotate relative to each other, thus fixing the sleeve 45 and the fixed block 41 relative to each other. The sleeve 45 will not move relative to the fixed block 41. When it is not necessary to rotate the pipe 5 relative to the fixed block 41, the second electromagnet 475 can be energized to position the pipe 5 relative to the fixed block 41, avoiding the pipe 5 from rotating arbitrarily relative to the fixed block 41 during the movement of the pipe 5, which would affect normal construction. When the two pipes 5 are joined in the pit 1 and the joint needs to be welded, the second electromagnet 475 is de-energized, and the second iron block 474 moves radially under the action of the second spring 473. The inner ring 461 and the outer ring 462 are released from their relative fixed connection, and the inner ring 461 and the outer ring 462 can rotate relative to each other. The sleeve 45 can rotate relative to the fixed block 41, thereby driving the pipe 5 to rotate.

[0063] The present invention also provides a construction method for the underground pipeline installation device, comprising:

[0064] S1. A support frame is erected on one side of the pit 1 where the pipe 5 is to be installed, and multiple electric hoists 3 are spaced apart along the longitudinal direction of the pit 1 on the support frame. Each electric hoist 3 is slidably connected to the support frame along the longitudinal direction of the pit 1.

[0065] S2. Transport the pipe 5 to be installed to the other side of the recess 1 of pipe 5. The axis of pipe 5 extends longitudinally along the recess 1. Number pipe 5 from 1 to n longitudinally from the recess 1.

[0066] S3. A pad is placed at the bottom of the middle part of pipe 1 so that both ends of the pipe are suspended. A clamping mechanism 4 is fitted at each end of pipe 1. Specifically, before each clamping mechanism 4 is fitted onto the pipe, all first electromagnets 433 and all second electromagnets 475 are energized. The space of the circular structure formed by multiple clamping blocks 42 is larger than the pipe size. The square frame is pushed to the end of the pipe, so that the axis of the pipe and the axis of the sleeve 45 are on the same line. The height of the support is adjusted so that the concave surface of the clamping block at the bottom corresponds axially with the concave surface of the bottom of the pipe. The clamping mechanism 4 is moved towards the pipe. The end of the pipe passes through the space of the circular structure formed by multiple clamping blocks 42. The bottom of the pipe rests on the concave surface of the clamping block at the bottom. Then all first electromagnets 433 are de-energized. The clamping blocks 42 move towards the circumferential side of the pipe under the action of the first spring 44. The multiple clamping blocks 42 abut against the circumferential side wall of the pipe.

[0067] S4. Connect the lifting lug 411 on each fixed block 41 fitted on each No. 1 pipe to the hook of an electric hoist 3. At this time, the electric hoist 3 and the corresponding clamping mechanism are set in the horizontal direction. Start the two electric hoists 3 corresponding to No. 1 pipe and pull No. 1 pipe towards the pit 1 to the top of the pit 1. Then start the electric hoist 3 again and lower No. 1 pipe and the two clamping mechanisms 4 on it into the pit 1.

[0068] S5. Repeat operations S2~S4 to move pipe 2 into pit 1 and connect the two adjacent ends of pipe 1 and pipe 2.

[0069] S6. Use an electric welding device to weld the joint between pipes 1 and 2. During the welding process, de-energize the second electromagnet 475 to make the sleeve 45 and the relative fixed block 41 rotate, thereby driving the pipe to rotate and rotating the joint between the two pipes to the working position.

[0070] S7. After the butt joint welding of pipes 1 and 2 is completed, the first electromagnet 433 is energized, and the clamping blocks 42 on pipes 1 and 2 release their clamping of the pipes. Then, the clamping mechanisms 4 on pipes 1 and 2 are moved longitudinally towards the rear end of the pit 1. The two clamping mechanisms 4 on pipe 1 are moved to pipe 2, and the first electromagnet 433 of the two clamping mechanisms 4 is de-energized. The two clamping mechanisms 4 clamp pipe 2. During the process of the two clamping mechanisms 4 on pipe 1 moving towards the rear end of the pit 1, jacks are set at the front end and the bottom of the middle part of pipe 1 to lift pipe 1 and keep pipes 1 and 2 coaxial. The two clamping mechanisms 4 on pipe 2 are moved to the installation position of pipe 3. The electric hoist 3 is started to lift the two clamping mechanisms 4 corresponding to pipe 3 upward to the height where the bottom of the fixing block 41 is level with the ground. The clamping mechanisms 4 are pulled laterally to the placement position of pipe 3.

[0071] S8. Repeat S3~S4 to place the two clamping mechanisms 4 on pipe No. 3 and move pipe No. 3 into pit 1. Repeat S6 to weld the joint between pipe No. 2 and pipe No. 3.

[0072] S9. Repeat S7~S8 to install pipes 4~n. After the pipe installation is completed, move the clamping mechanism 4 to the rear end of pit 1 and lift it up from the rear end of pit 1 to remove it from pit 1. Remove the jack at the bottom of the pipe and lower the pipe into place.

[0073] The number of devices and processing scale described herein are for the purpose of simplifying the description of the invention. Applications, modifications, and variations of the invention will be readily apparent to those skilled in the art.

[0074] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. Method of construction of an underground pipe laying apparatus, characterised in that, The underground pipeline installation device comprises: a support frame arranged on the ground and located at one side of a pit for installing pipelines; a plurality of electric hoists longitudinally and spacedly arranged on the support frame, each electric hoist being longitudinally and slidably arranged on the support frame; a plurality of clamping mechanisms, one clamping mechanism being arranged corresponding to each electric hoist, and two clamping mechanisms being arranged corresponding to each pipeline to be installed during installation, each clamping mechanism comprising: a fixed block in a cubic structure, a circular through hole being arranged in the middle of the fixed block for the pipeline to be installed to pass through, a roller being arranged at the bottom of the fixed block, and a lifting lug being arranged at the top of the fixed block and connected with the hook of the corresponding electric hoist; a plurality of clamping blocks, each clamping block being in an arc structure matched with the circumferential side surface of the pipeline to be installed, a sleeve being arranged between the through hole and the plurality of clamping blocks, the sleeve being rotatably connected with the inner wall of the through hole through a bearing, the convex surface of the clamping block at the bottom being connected with the inner wall of the sleeve through a vertically arranged support seat, the convex surface of each remaining clamping block being connected with the inner wall of the sleeve through a first telescopic rod, the first telescopic rod being telescopic along the radial direction of the pipeline, a first spring being sleeved on each first telescopic rod, one end of the first spring being connected with the inner wall of the sleeve, and the other end of the first spring extending along the radial direction and being connected with the convex surface of the clamping block; each first telescopic rod comprising a first rod body and a second rod body which are slidably sleeved, one end of the second rod body being fixedly connected with the inner wall of the sleeve, the inside of the second rod body being provided with a first electromagnet, one end of the first rod body penetrating through the other end of the second rod body and being inserted into the inside of the second rod body, and the first rod body being provided with a first iron block matched with the first electromagnet, the other end of the first rod body being connected with the convex surface of the corresponding clamping block; a plurality of second telescopic rods being arranged on the outer wall of the inner ring of the bearing, each second telescopic rod comprising a fixed cylinder extending along the radial direction of the bearing and a limiting rod slidably arranged on the inner side wall of the fixed cylinder along the radial direction of the bearing, one end of the limiting rod being connected with the inner wall of the fixed cylinder through a second spring, the other end of the limiting rod being provided with a second iron block, and a second electromagnet matched with the second iron block being annularly arranged on the inner wall of the outer ring of the bearing; and a construction method of the underground pipeline installation device, which comprises: S1, arranging a support frame on one side of a pit for installing pipelines, and longitudinally and spacedly arranging a plurality of electric hoists on the support frame, each electric hoist being longitudinally and slidably connected with the support frame; S2, transporting the pipeline to be installed to the other side of the pipeline pit, the axis of the pipeline extending along the longitudinal direction of the pit, and numbering the pipeline from 1 to n along the longitudinal direction of the pit; S3, a cushion block is arranged at the bottom of the middle of the No. 1 pipeline to make both ends of the pipeline suspended, a clamping mechanism is arranged at each end of the No. 1 pipeline, before each clamping mechanism is sleeved on the pipeline, all the first electromagnets are energized, all the second electromagnets are energized, the space of the circular structure surrounded by the plurality of clamping blocks is larger than the size of the pipeline, the fixed block is pushed to the end of the pipeline, the axis of the pipeline is aligned with the axis of the sleeve, the clamping mechanism is moved towards the pipeline, the end of the pipeline passes through the space of the circular structure surrounded by the plurality of clamping blocks, then all the first electromagnets are de-energized, the clamping blocks are moved towards the circumferential side of the pipeline under the action of the first spring, the plurality of clamping blocks abut against the circumferential wall of the pipeline; S4, the lifting lugs on each fixed block sleeved on the No. 1 pipeline are connected with the hooks of an electric hoist, at this time, the electric hoist and the corresponding fixed block are arranged correspondingly in the transverse direction, the corresponding two electric hoists of the No. 1 pipeline are started, the No. 1 pipeline is pulled towards the direction of the pit to above the pit, then the electric hoists are started again, the No. 1 pipeline and the two clamping mechanisms thereon are lowered into the pit; S5, the operations of S3~S4 are repeated, the No. 2 pipeline is moved into the pit, and the two ends of the No. 1 pipeline and the No. 2 pipeline adjacent to each other are butt-jointed; S6, the butt joints of the No. 1 and No. 2 pipelines are welded by using a welding device, during the welding process, the second electromagnets are de-energized, the sleeve is rotated relative to the fixed block, thereby driving the pipeline to rotate, and the butt joints of the two pipelines are rotated to the working site; S7, after the butt joints of the No. 1 and No. 2 pipelines are welded, the first electromagnets are energized, the clamping blocks on the No. 1 and No. 2 pipelines are released from clamping the pipeline, then the clamping mechanisms on the No. 1 and No. 2 pipelines are moved towards the rear end of the pit in the longitudinal direction of the pit, the two clamping mechanisms on the No. 1 pipeline are moved to the No. 2 pipeline, and the first electromagnets of the two clamping mechanisms are de-energized, the two clamping mechanisms clamp the No. 2 pipeline, in the process of moving the two clamping mechanisms on the No. 1 pipeline towards the rear end of the pit, a jack is arranged at the front end and the middle of the No. 1 pipeline, the No. 1 pipeline is jacked up, and the No. 1 pipeline and the No. 2 pipeline are coaxial; the two clamping mechanisms on the No. 2 pipeline are moved to the No. 3 pipeline installation site, the electric hoists are started to lift the corresponding two clamping mechanisms of the No. 3 pipeline to the height of the bottom of the fixed block and the ground, the clamping mechanisms are pulled in the transverse direction, and the clamping mechanisms are pulled to the No. 3 pipeline to be placed; S8, the operations of S3~S4 are repeated, the two clamping mechanisms are sleeved on the No. 3 pipeline and the No. 3 pipeline is moved into the pit, the operation of S6 is repeated to weld the butt joints of the No. 2 and No. 3 pipelines; S9, the operations of S7~S8 are repeated to install the No. 4~n pipelines, after the pipeline installation is completed, the clamping mechanisms are moved to the rear end of the pit and are lifted upwards from the rear end of the pit to take out from the pit, the jack at the bottom of the pipeline is removed, and the pipeline is lowered into place.

2. The construction method of a underground pipe laying apparatus according to claim 1, wherein The concave surface of the clamping block at the bottom is embedded with rolling balls, and the concave surface of each clamping block except the bottom clamping block is coated with an elastic rubber pad.

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