Pipe hoisting and laying device and pipe hoisting method

Abstract

The invention discloses a pipe hoisting and laying device and a pipe hoisting method, and belongs to the technical field of hoisting. The pipe hoisting and laying device comprises a portal frame, a hoisting head is slidably connected to the portal frame, a positioning mechanism is arranged between the hoisting head and the portal frame, and a winding device is further arranged on the portal frame; and the winding device is connected with the hoisting head through a rope. The pipe hoisting method comprises the following steps that S1, a plurality of portal frames are arranged at the position where a pipe ditch is located at intervals; s2, a hoisting device is adopted to control the hoisting head to be located above the pipe, and a positioning mechanism is used for positioning the hoisting head; s3, the pipe is fixed through a hoisting hoist and a hoisting belt, and the hoisting belt is gradually tensioned to apply force until the pipe just leaves the ground; s4, positioning of the hoisting head by the positioning mechanism is relieved, and the position of the hoisting head on the inclined beam is adjusted through the winding device until the pipe is located above the pipe ditch; and S5, the hoisting hoist is loosened until the pipe is placed in the pipe ditch.

Description

Technical Field

[0001] The invention relates to a hoisting technology, and more specifically, to a pipe hoisting and laying device and a pipe hoisting method. Background Art

[0002] For pipes with larger diameters and longer lengths, such as plastic pipes and steel pipes with diameters greater than 300mm and lengths greater than 18m, they are heavy and long, so they are prone to breakage or permanent deformation due to the bending moment caused by their own weight during hoisting. With the advancement of technology, cases of producing pipes on site have been reported in the newspapers, which makes it possible to produce extra-long pipes, thereby reducing pipe joints and improving the sealing reliability of pipeline projects; in addition, similar to glass fiber reinforced plastic pipes, steel pipes and other pipes, in order to achieve reliable connections without leakage, they will be connected by bonding, welding and other methods. After the connection is completed, multiple sections of pipes will also become an integral extra-long pipe. This type of operation is more conducive to ensuring the quality of the connection when completed on the ground, which also brings up the question of how to correctly hoist the extra-long pipe into the foundation pit. In order to ensure the safety of the hoisting of the above-mentioned pipes, it is necessary to adopt a hoisting method with multiple hoisting points arranged at a certain interval, and the lifting and moving speeds of each hoisting point are required to be basically the same to prevent the relative position deviation from being too large and causing load concentration.

[0003] For example: Chinese patent announcement number CN219839364U, announcement date October 17, 2023, the name of the utility model is a tool for lifting large pipes, and the application discloses a pipe lifting technology, including a balanced beam boom, a lifting rope is provided on the balanced beam boom, and a lifting lug for connecting to the pipe lifting hole is fixedly connected to the end of the lifting rope away from the balanced beam boom; static legs are provided on both ends of the balanced beam boom, and a main lifting hole is provided in the middle of the balanced beam boom, and two lifting ropes are provided; the utility model has a simple structure and is easy to use. The distance adjustment device provided on the balanced beam boom is used to adjust the distance between the first main lifting rope and the second main lifting rope, so that the scheme has a wider range of application for the lifting of large pipes of various diameters, but the scheme cannot be applied to the lifting of large pipes (including pipes spliced ​​together), and the lifting is difficult. Summary of the invention

[0004] The present invention overcomes the problem that existing lifting devices have difficulty in lifting pipes with larger diameters and longer lengths, and provides a pipe lifting and laying device and a pipe lifting method. This scheme can stably lift pipes with larger diameters and longer lengths, and can effectively avoid the problem of breakage and deformation of pipes caused by uneven force.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a pipe hoisting and laying device, including a gantry, a hoisting head is slidably connected to the gantry, a positioning mechanism is provided between the hoisting head and the gantry, and a winch is also provided on the gantry, and the winch is connected to the hoisting head by a rope. In this solution, it is necessary to use multiple gantries to be arranged in the axial direction of the pipe, and the pipe is bundled and positioned by the hoisting head and sling on each gantry. The position of the hoisting head can be changed by retracting and releasing the hoisting head through the hoisting device, thereby adjusting the position of the pipe, and finally making the pipe enter the foundation pit. This solution can stably lift pipes with larger diameters, and can also arrange an appropriate number of gantries according to the length of the pipe to meet the requirements of pipes of any length; avoiding breakage and deformation caused by uneven force on the pipe.

[0006] Preferably, the gantry includes a first column and a second column, the height of the first column is greater than the height of the second column, and inclined beams are provided at the tops of the first column and the second column, and the angle between the inclined beams and the horizontal plane is between 5° and 35°. The left and right columns of the gantry are designed to have different heights, so that the lifting head can slide down to any position of the inclined beam according to its own gravity, which is convenient for adjusting the lifting head. The inclination angle of the inclined beam should be designed within a reasonable range. If the inclination angle of the inclined beam is too small, the lifting head cannot move according to its own gravity. If the angle of the inclined beam is too large, it will be difficult to move the lifting head subsequently and it is easy to damage the structure on the gantry. Therefore, the design between 5° and 35° is the best.

[0007] Preferably, the positioning mechanism includes a positioning tooth provided on the inclined beam and a stopper provided on the lifting head, wherein the stopper is elastically connected to the lifting head and cooperates with the positioning tooth. The positioning tooth on the inclined beam and the stopper on the lifting head can be engaged and cooperated, thereby realizing the positioning of the lifting head on the inclined beam, which is convenient for positioning, lifting and entering the pit when the pipe is lifted.

[0008] Preferably, the lifting head comprises a lifting shell, a lateral moving wheel is arranged in the lifting shell, and a slide rail adapted to the lateral moving wheel is arranged on the inclined beam. The lifting head and the inclined beam can realize relative lateral movement through the lateral moving wheel and the slide rail, so that the pipe can be adjusted in position and smoothly enter the foundation pit (pipe trench).

[0009] Preferably, the lifting head is provided with a lifting block, the lifting block is hinged to the lifting shell, and the lifting block is connected to a lifting hoist. The lifting block is hinged to the lifting shell, so as to absorb the unbalanced force generated by the shaking of the pipe and avoid damage to the lifting head and the positioning teeth; the lifting hoist is used for lifting and lowering the pipe.

[0010] Preferably, a fixed pulley is provided on the side of the inclined beam close to the first column, and the hoisting device is connected to the hoisting head through a steel wire rope, and the steel wire rope is wound on the fixed pulley. The hoisting device and the hoisting head are connected through a steel wire rope, and the steel wire rope is wound on the fixed pulley, which can greatly reduce the resistance during the traction process of the steel wire rope. The fixed pulley is arranged on the first column, which can pull the hoisting head to a higher position, thereby ensuring that the hoisting head moves from a high place to a low place.

[0011] Preferably, the inclined beam is also provided with a transverse scale, which can well display the moving distance of the hoisting head, so as to facilitate the adjustment of the position of the pipe.

[0012] Preferably, an axial sliding device is provided at the bottom of the gantry, which enables the gantry to move along the axial direction of the pipe, thereby adjusting the position of the pipe entering the pit; similarly, it is also convenient for the gantry to be distributed in the foundation pit or pipe trench.

[0013] A pipe hoisting method is implemented by using the above-mentioned pipe hoisting and laying device, and comprises the following steps: S1: using a plurality of gantries to be arranged at intervals at the location of the pipe trench; S2: using a hoisting device to control the hoisting head to be located above the pipe, using a positioning mechanism to position the hoisting head, and tightening the hoisting device; S3: fixing the pipe by a hoisting hoist and a sling and gradually tightening the force on the sling until the pipe just leaves the ground; S4: releasing the positioning of the hoisting head by the positioning mechanism, and adjusting the position of the hoisting head on the inclined beam by the hoisting device until the pipe is located above the pipe trench; S5: loosening the hoisting hoist until the pipe is placed in the pipe trench.

[0014] As a preference, when adjusting the position of the lifting head horizontally and relaxing the lifting hoist longitudinally, multiple equal movements are used, with each movement amounting to 5 cm to 10 cm. The pipes in the lifting process need to be adjusted in position by multiple movements, and the amount of each movement should ensure that the device on each gantry is the same to avoid uneven force on the pipes, resulting in breakage and deformation.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) the present solution can stably lift pipes with larger diameters and longer lengths, and can effectively avoid the problem of pipe breakage and deformation caused by uneven force on the pipes; (2) the structure is stable and simple, the method of use is highly safe, a large amount of manpower and material resources can be saved, the cost is low, and the pipe can be easily disassembled and assembled on site; (3) the shaking of the pipe during the lifting process can be effectively avoided, greatly improving the safety of the lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the gantry of the present invention.

[0018] Figure 3 It is a schematic diagram of the cross section of the inclined beam of the present invention.

[0019] Figure 4 It is an axonometric view of the lifting head of the present invention.

[0020] Figure 5 It is the front view of the lifting head of the present invention.

[0021] Figure 6 It is a side view of the lifting head of the present invention.

[0022] Figure 7 Schematic diagram of the method of using the present invention.

[0023] In the figure: 1. gantry, 2. lifting head, 3. winch, 3.1. winch bracket, 3.2. winch, 4. first column, 5. second column, 6. inclined beam, 7. positioning tooth, 8. block, 9. lifting shell, 10. transverse moving wheel, 11. slide rail, 12. lifting block, 13. lifting hoist, 14. fixed pulley, 15. wire rope, 16. transverse scale, 17. axial sliding device, 17.1. axial wheel, 17.2. track, 18. lifting belt, 19. pipe, 20. hole groove, 21. spring, 22. traction hole, 23. triangular support frame, 24. support rod, 25. height gauge, 26. through hole. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0025] Example 1: Figures 1 to 6 A pipe hoisting and laying device shown includes a gantry 1, which includes a first column 4 and a second column 5. An inclined beam 6 is arranged on the top of the first column 4 and the second column 5. The inclined beam 6 is caused by the different heights of the first column 4 and the second column 5. Specifically, the height of the first column 4 is greater than the height of the second column 5, and the height of the inclined beam 6 on one side of the first column 4 is higher than the height of the inclined beam 6 on the side of the second column 5. A hoisting head 2 is arranged on the inclined beam 6, and the hoisting head 2 is connected to the inclined beam 6 by sliding. Since the inclined beam 6 is in an inclined state, the hoisting head 2 will slide from a high place to a low place due to its own gravity when it is not subjected to force on the inclined beam 6, thereby reducing the additional device for driving the hoisting head 2 to move.

[0026] A hoisting device 3 is arranged on the first column 4. Specifically, the hoisting device 3 includes a hoisting bracket 3.1 and a hoist 3.2. The hoisting bracket 3.1 is transversely fixed on the first column 4. The hoist 3.2 is arranged at the end of the hoisting bracket 3.1 away from the first column 4. A fixed pulley 14 is arranged on the top of the first column 4 or at the end of the inclined beam 6 close to the first column 4. The position of the fixed pulley 14, the connection point between the hoisting bracket 3.1 and the first column 4 and the position of the hoist 3.2 form a right triangle layout. A wire rope 15 is wound around the hoist 3.2. The wire rope 15 is released from the hoist 3.2, bypasses the fixed pulley 14 and is then connected to the lifting head 2. In the initial state, the winch 3.2 is in a tightened state, most of the wire rope 15 is reeled in the winch 3.2, and the lifting head 2 is located at a position close to the first column 4 of the inclined beam 6. Therefore, when the winch 3.2 releases the wire, the lifting head 2 can move from the higher side of the inclined beam 6 to the lower side of the inclined beam 6 under the action of its own gravity.

[0027] It should be noted that the heights of the first column 4 and the second column 5 are both adjustable. Specifically, the first column 4 and the second column 5 are telescopic rod structures. The height difference between the two can be adjusted by telescoping the first column 4 and the second column 5. In the actual operation process, it is also necessary to consider the specific distance between the first column 4 and the second column 5. The inclination angle of the inclined beam 6 at the top of the first column 4 and the second column 5 should be maintained between 5° and 35°. If the inclination angle of the inclined beam 6 is too small, the lifting head 2 cannot move according to its own gravity. If the angle of the inclined beam 6 is too large, it will be difficult to move the lifting head 2 subsequently and it is easy to damage the structure on the gantry 1.

[0028] A positioning mechanism is also provided between the hoisting head 2 and the tilting beam 6. The positioning mechanism includes a positioning tooth 7 and a stopper 8. Specifically, Figure 2 or Figure 3 As shown, the positioning teeth 7 are rack structures arranged on the upper surface of the inclined beam 6. Figures 4 to 6 As shown, the lifting head 2 includes a lifting shell 9, a hole groove 20 is opened on the upper surface of the lifting shell 9, and a stopper 8 is arranged at the position of the hole groove 20 of the lifting shell 9 and close to one side of the lifting shell 9. The stopper 8 is an L-shaped structure, and the middle part of the stopper 8 is rotatably connected to the lifting shell 9, one end of the stopper 8 is located in the hole groove 20, and the other end is located outside the lifting shell 9, and the lifting head 2 is slidably connected to the inclined beam 6, so that the position of the hole groove 20 on the lifting shell 9 will correspond to the position of the positioning tooth 7 on the inclined beam 6, that is, the stopper 8 can cooperate with the positioning tooth 7. Figure 6In the figure, a spring 21 is arranged at the bottom of the positioning tooth 7 and on the inner wall of the lifting shell 9. The spring 21 can tighten the stopper 8 so that the stopper 8 and the positioning tooth 7 on the inclined beam 6 remain in meshing state, thereby positioning the lifting head 2 along the length direction (lateral direction) of the inclined beam 6.

[0029] Among them, one end of the stopper 8 that cooperates with the positioning tooth 7 is a wedge-shaped tooth to better fit the tooth groove of the positioning tooth 7; and a through hole 26 is provided at the other end of the stopper 8, through which a traction rope can pass, and the traction rope can drive the stopper 8 to rotate; when it is necessary to release the cooperation between the stopper 8 and the positioning tooth 7, it is only necessary to pull the traction rope downward so that the end of the stopper 8 located in the hole groove 20 is lifted up, and it can be separated from the positioning tooth 7; and the traction rope can be tied to the first column 4 or the second column 5. When it is necessary to position the lifting head 2, it is only necessary to loosen the traction rope, and under the action of the spring 21, the end of the stopper 8 located in the hole groove 20 will cooperate with the positioning tooth 7.

[0030] The lifting head 2 and the inclined beam 6 are connected by sliding. Figure 3 As shown, the cross section of the inclined beam 6 is an I-shaped structure as a whole, and the upper surface of the inclined beam 6 is a continuously distributed positioning tooth 7, and slide rails 11 are arranged on both sides of the I-shaped inclined beam 6. The slide rails 11 are distributed along the length of the inclined beam 6, and the slide rails 11 are arranged on both upper and lower inner surfaces of the inclined beam 6; and the corresponding Figures 4 to 6 , a transverse moving wheel 10 is arranged inside the hoisting shell 9, and there are four transverse moving wheels 10 in total, and they are symmetrically arranged on the inner sides of the two side walls of the hoisting shell 9; two transverse moving wheels 10 are arranged on each side wall, and the rotating shaft of the transverse moving wheel 10 is close to the bottom position of the side wall of the hoisting shell 9, so that the top of the transverse moving wheel 10 keeps a certain distance from the top of the hoisting shell 9 to accommodate the positioning teeth 7 on the upper surface of the inclined beam 6. When the hoisting head 2 is assembled with the inclined beam 6, the transverse moving wheels 10 on the two side walls of the hoisting shell 9 will be located on the slide rails 11 on both sides of the inclined beam 6 respectively, and the top and bottom of the transverse moving wheel 10 are matched and limited to prevent the hoisting head 2 from vertically jumping when moving horizontally.

[0031] A traction hole 22 is also provided on the hoisting housing 9. The traction hole 22 is provided at the top of the hoisting housing 9 and close to one side of the first column 4. The traction hole 22 is used to connect with the steel wire rope 15 on the hoisting device 3, providing a connection point for the steel wire rope 15. The traction hole 22 is a ring structure and is fixedly connected to the hoisting housing 9 by a thread.

[0032] A lifting block 12 is arranged at the bottom of the lifting shell 9 and on the outer side walls of the lifting shell 9. The lifting block 12 is a U-shaped plate structure as a whole. The lifting block 12 and the lifting shell 9 are rotatably connected, and the bottom of the lifting block 12 is connected to a lifting hoist 13, which is hung at the bottom of the lifting block 12. Among them, the lifting block 12 is connected to the lifting shell 9 in a hinged manner. When the lifting pipe 19 at the bottom of the lifting hoist 13 is lifted, the force generated by the swing of the pipe 19 can be transferred to the position of the hinge shaft to prevent the lifting block 12 from being too rigid and damaging the lifting block 12 or the positioning teeth 7 on the inclined beam 6. It should also be noted that in this solution, the lifting hoist 13 is preferably an electric hoist. Through electric control, it can not only accurately control the displacement, but also reduce manpower consumption.

[0033] like Figure 3 As shown, a transverse scale 16 is also provided on the I-shaped support body on the inclined beam 6, and the transverse scale 16 can reflect the displacement of the lifting head 2 on the inclined beam 6, so as to facilitate the position adjustment of the lifting head 2. The transverse scale 16 is relatively thin to prevent the lifting head 2 from interfering with the transverse scale 16 and affecting the movement of the lifting head 2.

[0034] An axial sliding device 17 is also provided at the bottom of the first column 4 and the second column 5. The axial sliding device 17 includes an axial wheel 17.1. Specifically, an isosceles triangular support frame 23 is provided at the bottom of the first column 5 and the second column 5 to ensure that the first column 4 and the second column 5 can be stably placed vertically. The triangular support frame 23 is horizontally arranged at the bottom edge and fixedly connected to the bottom ends of the first column 4 and the second column 5, and the axial wheel 17.1 is arranged below the bottom edge of the triangular support frame 23, and two axial wheels 17.1 are provided. Similarly, in order to better move the gantry 1, a corresponding track 17.2 can be provided for the axial wheel 17.1 to move, so as to ensure the linear axial movement of the gantry 1.

[0035] A support rod 24 is also provided between the first column 4 and the inclined beam 6, and between the second column 5 and the inclined beam 6; it is used to improve the stability between the inclined beam 6, the first column 4 and the second column 5. Since the first column 4 and the second column 5 can also be telescopic to adjust the height, the support rod 24 should also be a telescopic rod, and the two ends of the support rod 24 need to be hinged to the first column 4, the second column 5 and the inclined beam 6. Of course, the first column 4 and the second column 5 can also be customized rods with a constant length, and the support rod 24 only needs to be a fixed rod with a constant length, and the support rod 24 and the first column 4 and the second column 5 can be welded or hinged.

[0036] A pipe lifting method, such as Figure 7As shown, the above-mentioned pipe hoisting and laying device is used for implementation, and a DN800mm 24m long pipe 19 is hoisted as an example, as follows.

[0037] According to the number and distribution of the gantries 1, the corresponding positions of the pipes 19 already located on the side of the trench (or foundation pit, not shown in the figure) are marked, and the hard ground required for the axial movement of the gantries 1 is leveled; in this scheme, four groups of gantries 1 are used and distributed at equal intervals in the trench. The gantries 1 and the corresponding structures are assembled on site with manual or mechanical assistance. During installation, the gantries 1 should be aligned as a whole according to the trench axis, and the plane of the gantries 1 should be perpendicular to the trench axis; a height gauge 25 is hung at the same position of the inclined beam 6 on each group of gantries 1.

[0038] After assembly, the stopper 8 is disengaged from the positioning tooth 7 on the inclined beam 6, and the lifting head 2 is moved laterally by the wire-releasing operation of the winch 3.2 until the lifting head 2 reaches directly above the pipe 19, and then the stopper 8 is engaged with the positioning tooth 7 to locate the position of the lifting head 2, and the winch 3.2 is tightened. Then, the sling 18 is passed through the pipe 19, and the hoisting hoist 13 is controlled to gradually tighten the sling 18 until the pipe 19 leaves the ground; at this time, the reading of the lifting head 2 on each gantry 1 on the horizontal displacement scale 16 and the reading of the top position of the pipe 19 on the height scale 25 are recorded, and the block 8 and the positioning tooth 7 are separated again, the positioning mechanism is released, and the position of the lifting head 2 is controlled by the winch 3.2 and the position of the pipe 19 is controlled by the hoisting hoist 13. The movement of the position of the lifting head 2 and the movement of the position of the pipe 19 both need to be moved multiple times, and the specific movement amount each time is 5 cm, that is, the horizontal movement amount of the lifting head 2 each time is 5 cm, and the lifting hoist 13 controls the movement amount of the pipe each time is 5 cm. Among them, when the lifting head 2 is located above the pipe trench, the winch 3.2 is no longer controlled to move the lifting block 2, and it is only necessary to control the hoisting hoist 13 to vertically adjust the position of the pipe 19. After the position of the pipe 19 is adjusted into place, the hoisting hoist 13 is loosened until the load is unloaded, thereby completing the operation of placing the pipe 19 into the pipe trench (foundation pit). Finally, when the gantry 1 is no longer used, the pipe hoisting and laying device can be dismantled.

[0039] Example 2: Figures 1 to 6A pipe hoisting and laying device shown includes a gantry 1, which includes a first column 4 and a second column 5. An inclined beam 6 is arranged on the top of the first column 4 and the second column 5. The inclined beam 6 is caused by the different heights of the first column 4 and the second column 5. Specifically, the height of the first column 4 is greater than the height of the second column 5, and the height of the inclined beam 6 on one side of the first column 4 is higher than the height of the inclined beam 6 on the side of the second column 5. A hoisting head 2 is arranged on the inclined beam 6, and the hoisting head 2 is connected to the inclined beam 6 by sliding. Since the inclined beam 6 is in an inclined state, the hoisting head 2 will slide from a high place to a low place due to its own gravity when it is not subjected to force on the inclined beam 6, thereby reducing the additional device for driving the hoisting head 2 to move.

[0040] A hoisting device 3 is arranged on the first column 4. Specifically, the hoisting device 3 includes a hoisting bracket 3.1 and a hoist 3.2. The hoisting bracket 3.1 is transversely fixed on the first column 4. The hoist 3.2 is arranged at the end of the hoisting bracket 3.1 away from the first column 4. A fixed pulley 14 is arranged on the top of the first column 4 or at the end of the inclined beam 6 close to the first column 4. The position of the fixed pulley 14, the connection point between the hoisting bracket 3.1 and the first column 4 and the position of the hoist 3.2 form a right triangle layout. A wire rope 15 is wound around the hoist 3.2. The wire rope 15 is released from the hoist 3.2, bypasses the fixed pulley 14 and is then connected to the lifting head 2. In the initial state, the winch 3.2 is in a tightened state, most of the wire rope 15 is reeled in the winch 3.2, and the lifting head 2 is located at a position close to the first column 4 of the inclined beam 6. Therefore, when the winch 3.2 releases the wire, the lifting head 2 can move from the higher side of the inclined beam 6 to the lower side of the inclined beam 6 under the action of its own gravity.

[0041] It should be noted that the heights of the first column 4 and the second column 5 are both adjustable. Specifically, the first column 4 and the second column 5 are telescopic rod structures. The height difference between the two can be adjusted by telescoping the first column 4 and the second column 5. In the actual operation process, it is also necessary to consider the specific distance between the first column 4 and the second column 5. The inclination angle of the inclined beam 6 at the top of the first column 4 and the second column 5 should be maintained between 5° and 35°. If the inclination angle of the inclined beam 6 is too small, the lifting head 2 cannot move according to its own gravity. If the angle of the inclined beam 6 is too large, it will be difficult to move the lifting head 2 subsequently and it is easy to damage the structure on the gantry 1.

[0042] A positioning mechanism is also provided between the hoisting head 2 and the tilting beam 6. The positioning mechanism includes a positioning tooth 7 and a stopper 8. Specifically, Figure 2 or Figure 3 As shown, the positioning teeth 7 are rack structures arranged on the upper surface of the inclined beam 6. Figures 4 to 6As shown, the lifting head 2 includes a lifting shell 9, a hole groove 20 is opened on the upper surface of the lifting shell 9, and a stopper 8 is arranged at the position of the hole groove 20 of the lifting shell 9 and close to one side of the lifting shell 9. The stopper 8 is an L-shaped structure, and the middle part of the stopper 8 is rotatably connected to the lifting shell 9, one end of the stopper 8 is located in the hole groove 20, and the other end is located outside the lifting shell 9, and the lifting head 2 is slidably connected to the inclined beam 6, so that the position of the hole groove 20 on the lifting shell 9 will correspond to the position of the positioning tooth 7 on the inclined beam 6, that is, the stopper 8 can cooperate with the positioning tooth 7. Figure 6 In the figure, a spring 21 is arranged at the bottom of the positioning tooth 7 and on the inner wall of the lifting shell 9. The spring 21 can tighten the stopper 8 so that the stopper 8 and the positioning tooth 7 on the inclined beam 6 remain in meshing state, thereby positioning the lifting head 2 along the length direction (lateral direction) of the inclined beam 6.

[0043] Among them, one end of the stopper 8 that cooperates with the positioning tooth 7 is a wedge-shaped tooth to better fit the tooth groove of the positioning tooth 7; and a through hole 26 is provided at the other end of the stopper 8, through which a traction rope can pass, and the traction rope can drive the stopper 8 to rotate; when it is necessary to release the cooperation between the stopper 8 and the positioning tooth 7, it is only necessary to pull the traction rope downward so that the end of the stopper 8 located in the hole groove 20 is lifted up, and it can be separated from the positioning tooth 7; and the traction rope can be tied to the first column 4 or the second column 5. When it is necessary to position the lifting head 2, it is only necessary to loosen the traction rope, and under the action of the spring 21, the end of the stopper 8 located in the hole groove 20 will cooperate with the positioning tooth 7.

[0044] The lifting head 2 and the inclined beam 6 are connected by sliding. Figure 3 As shown, the cross section of the inclined beam 6 is an I-shaped structure as a whole, and the upper surface of the inclined beam 6 is a continuously distributed positioning tooth 7, and slide rails 11 are arranged on both sides of the I-shaped inclined beam 6. The slide rails 11 are distributed along the length of the inclined beam 6, and the slide rails 11 are arranged on both upper and lower inner surfaces of the inclined beam 6; and the corresponding Figures 4 to 6 , a transverse moving wheel 10 is arranged inside the hoisting shell 9, and there are four transverse moving wheels 10 in total, and they are symmetrically arranged on the inner sides of the two side walls of the hoisting shell 9; two transverse moving wheels 10 are arranged on each side wall, and the rotating shaft of the transverse moving wheel 10 is close to the bottom position of the side wall of the hoisting shell 9, so that the top of the transverse moving wheel 10 keeps a certain distance from the top of the hoisting shell 9 to accommodate the positioning teeth 7 on the upper surface of the inclined beam 6. When the hoisting head 2 is assembled with the inclined beam 6, the transverse moving wheels 10 on the two side walls of the hoisting shell 9 will be located on the slide rails 11 on both sides of the inclined beam 6 respectively, and the top and bottom of the transverse moving wheel 10 are matched and limited to prevent the hoisting head 2 from vertically jumping when moving horizontally.

[0045] A traction hole 22 is also provided on the hoisting housing 9. The traction hole 22 is provided at the top of the hoisting housing 9 and close to one side of the first column 4. The traction hole 22 is used to connect with the steel wire rope 15 on the hoisting device 3, providing a connection point for the steel wire rope 15. The traction hole 22 is a ring structure and is fixedly connected to the hoisting housing 9 by a thread.

[0046] A lifting block 12 is arranged at the bottom of the lifting shell 9 and on the outer side walls of the lifting shell 9. The lifting block 12 is a U-shaped plate structure as a whole. The lifting block 12 and the lifting shell 9 are rotatably connected, and the bottom of the lifting block 12 is connected to a lifting hoist 13, which is hung at the bottom of the lifting block 12. Among them, the lifting block 12 is connected to the lifting shell 9 in a hinged manner. When the lifting pipe 19 at the bottom of the lifting hoist 13 is lifted, the force generated by the swing of the pipe 19 can be transferred to the position of the hinge shaft to prevent the lifting block 12 from being too rigid and damaging the lifting block 12 or the positioning teeth 7 on the inclined beam 6. It should also be noted that in this solution, the lifting hoist 13 is preferably an electric hoist. Through electric control, it can not only accurately control the displacement, but also reduce manpower consumption.

[0047] like Figure 3 As shown, a transverse scale 16 is also provided on the I-shaped support body on the inclined beam 6, and the transverse scale 16 can reflect the displacement of the lifting head 2 on the inclined beam 6, so as to facilitate the position adjustment of the lifting head 2. The transverse scale 16 is relatively thin to prevent the lifting head 2 from interfering with the transverse scale 16 and affecting the movement of the lifting head 2.

[0048] An axial sliding device 17 is also provided at the bottom of the first column 4 and the second column 5. The axial sliding device 17 includes an axial wheel 17.1. Specifically, an isosceles triangular support frame 23 is provided at the bottom of the first column 5 and the second column 5 to ensure that the first column 4 and the second column 5 can be stably placed vertically. The triangular support frame 23 is horizontally arranged at the bottom edge and fixedly connected to the bottom ends of the first column 4 and the second column 5, and the axial wheel 17.1 is arranged below the bottom edge of the triangular support frame 23, and two axial wheels 17.1 are provided. Similarly, in order to better move the gantry 1, a corresponding track 17.2 can be provided for the axial wheel 17.1 to move, so as to ensure the linear axial movement of the gantry 1.

[0049] A support rod 24 is also provided between the first column 4 and the inclined beam 6, and between the second column 5 and the inclined beam 6; it is used to improve the stability between the inclined beam 6, the first column 4 and the second column 5. Since the first column 4 and the second column 5 can also be telescopic to adjust the height, the support rod 24 should also be a telescopic rod, and the two ends of the support rod 24 need to be hinged to the first column 4, the second column 5 and the inclined beam 6. Of course, the first column 4 and the second column 5 can also be customized rods with a constant length, and the support rod 24 only needs to be a fixed rod with a constant length, and the support rod 24 and the first column 4 and the second column 5 can be welded or hinged.

[0050] A pipe lifting method, such as Figure 7 As shown, the above-mentioned pipe hoisting and laying device is used for implementation, and a DN800mm 24m long pipe 19 is hoisted as an example, as follows.

[0051] According to the number and distribution of the gantries 1, the corresponding positions of the pipes 19 already located on the side of the trench (or foundation pit, not shown in the figure) are marked, and the hard ground required for the axial movement of the gantries 1 is leveled; in this scheme, four groups of gantries 1 are used and distributed at equal intervals in the trench. The gantries 1 and the corresponding structures are assembled on site with manual or mechanical assistance. During installation, the gantries 1 should be aligned as a whole according to the trench axis, and the plane of the gantries 1 should be perpendicular to the trench axis; a height gauge 25 is hung at the same position of the inclined beam 6 on each group of gantries 1.

[0052] After assembly, the block 8 is separated from the positioning teeth 7 on the inclined beam 6, and the hoisting head 2 is moved horizontally by the line-release operation of the winch 3.2 until the hoisting head 2 reaches the top of the pipe 19, and then the block 8 is meshed with the positioning teeth 7 to locate the position of the hoisting head 2, and the winch 3.2 is tightened. Then the sling 18 is passed through the pipe 19, and the hoisting hoist 13 is controlled to gradually tighten the sling 18 until the pipe 19 leaves the ground; at this time, the reading of the hoisting head 2 on each gantry 1 on the lateral scale 16 and the reading of the top position of the pipe 19 on the height scale 25 are recorded, and the block 8 and the positioning teeth 7 are separated again, the positioning mechanism is released, and the winch 3.2 is controlled to move the position of the hoisting head 2 and the hoisting hoist 13 to move the position of the pipe 19.

[0053] Specifically, the winches 3.2 on the first and third groups (odd groups) or the second and fourth groups (even groups) of the gantry 1 are controlled to relax. At this time, the corresponding lifting head 2 on the gantry 1 is in a relaxed state and moves downward a certain distance under its own gravity. The distance is limited by the length of the lifting hoist 13 and will not move too long. It can also be specifically controlled to move 5cm to 10cm under the action of gravity. At this time, the lifting heads 2 on the odd and even groups are staggered, so that the pulling force of the lifting hoist 13 on the pipe 19 is not in the vertical direction, but along the radial sides of the pipe 19, that is, the pipe 19 is subjected to the component forces on both sides in the horizontal direction, so that the pipe 19 can be kept balanced in the horizontal direction and prevent the pipe 19 from shaking and causing safety accidents during the lateral movement. Then, it is only necessary to control the winches 3.2 of the odd and even groups to control the corresponding lifting heads 2 to move alternately so that there are always component forces on both sides of the pipe 19. The movement of the position of the lifting head 2 and the movement of the position of the pipe 19 both require multiple movements, with a specific movement amount of 5 cm each time, that is, the horizontal movement amount of the lifting head 2 each time is 5 cm.

[0054] When the lifting head 2 is located above the pipe trench, the winch 3.2 is no longer controlled to move the lifting block 2. At this time, the lifting heads 2 on the odd-array and even-array gantries 1 are still arranged in a staggered manner, and it is only necessary to control the lifting hoist 13 to vertically adjust the position of the pipe 19. At this time, there is still a balanced force on both sides of the pipe, and the lifting hoist 13 controls the pipe movement amount to 5cm each time. After the position of the pipe 19 is adjusted to the right position, the lifting hoist 13 is loosened until the load is unloaded, thereby completing the operation of placing the pipe 19 into the pipe trench (foundation pit). Finally, when the gantry 1 is no longer used, the pipe lifting and laying device can be dismantled.

Claims

1. A pipe hoisting and laying device, characterized in that: It comprises a gantry, a hoisting head is slidably connected to the gantry, a positioning mechanism is arranged between the hoisting head and the gantry, a winch is also arranged on the gantry, and the winch is connected to the hoisting head by a rope.

2. The pipe hoisting and laying device according to claim 1 is characterized in that: The gantry includes a first column and a second column, the height of the first column is greater than the height of the second column, and inclined beams are provided on the tops of the first column and the second column, and the angle between the inclined beams and the horizontal plane is between 5° and 35°.

3. A pipe hoisting and laying device according to claim 2, characterized in that: The positioning mechanism comprises a positioning tooth arranged on the inclined beam and a stopper arranged on the lifting head, wherein the stopper is elastically connected to the lifting head and cooperates with the positioning tooth.

4. A pipe hoisting and laying device according to claim 2 or 3, characterized in that: The hoisting head comprises a hoisting shell, a transverse moving wheel is arranged inside the hoisting shell, and a slide rail adapted to the transverse moving wheel is arranged on the inclined beam.

5. The pipe hoisting and laying device according to claim 4 is characterized in that: The lifting head is provided with a lifting block, the lifting block is hinged to the lifting shell, and the lifting block is connected with a lifting hoist.

6. The pipe hoisting and laying device according to claim 3 is characterized in that: A fixed pulley is provided on one side of the inclined beam close to the first column, and the hoisting device is connected to the hoisting head through a steel wire rope, and the steel wire rope is wound around the fixed pulley.

7. A pipe hoisting and laying device according to any one of claims 2, 3 or 6, characterized in that: A transverse scale is also provided on the inclined beam.

8. A pipe hoisting and laying device according to any one of claims 1 to 3 or 6, characterized in that: An axial sliding device is provided at the bottom of the gantry.

9. A pipe hoisting method, characterized in that: The pipe hoisting and laying device according to any one of claims 1 to 8 is implemented, comprising the following steps: S1: Several gantries are arranged at intervals at the location of the pipe trench; S2: Use the winch device to control the lifting head to be above the pipe, use the positioning mechanism to position the lifting head, and tighten the winch device; S3: Fix the pipe with the hoist and sling and gradually tighten the sling until the pipe just leaves the ground; S4: Release the positioning mechanism for the lifting head, and adjust the position of the lifting head on the inclined beam through the hoisting device until the pipe is located above the trench; S5: Release the hoisting hoist until the pipe is placed in the trench.

10. A pipe hoisting method according to claim 9, characterized in that: When adjusting the position of the lifting head horizontally and loosening the lifting hoist vertically, use multiple equal movements, with each movement being 5cm to 10cm.

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