Pipe lifting device

Abstract

The invention discloses a pipe lifting device. The pipe lifting device comprises a supporting part and a pipe lifting part hinged to the supporting part. The supporting part comprises a first base; the pipe lifting part comprises a pipe lifting assembly, the top end of the pipe lifting assembly is an operation end, the bottom end of the pipe lifting assembly is a working end, the pipe lifting assembly is hinged to the first base, and the hinge point is located between the top end and the bottom end of the pipe lifting assembly; a clamping part used for clamping the high-pressure straight pipe is arranged at the working end of the pipe lifting assembly, and the opening direction of the clamping part is opposite to the first base. The high-pressure straight pipe can be lifted in a more labor-saving manner, the labor intensity is low, and the safety is high; the pipe lifting device is suitable for pipe lifting operation in petroleum engineering or other pipeline construction industries.

Description

Technical Field

[0001] This invention belongs to the field of petroleum engineering, specifically a pipe lifting device. Background Technology

[0002] During well workover operations, the surface process consists of a system comprised of several high-pressure straight pipes, matching connectors, valves, and flexible elbows. When connecting these high-pressure straight pipes, they need to be hoisted to a designated location. Traditionally, several workers lift one end of the high-pressure straight pipe, connect it to another connector via a union joint, and then the worker rotates the union nut to complete the connection. This process requires multiple workers to lift the high-pressure straight pipe, is physically demanding, and poses certain safety hazards. Summary of the Invention

[0003] The present invention aims to provide a pipe lifting device to solve the problems of high labor intensity and low safety caused by manually lifting high-pressure straight pipes in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A pipe lifting device includes a support portion and a pipe lifting portion hinged to the support portion; The support includes a first base; The pipe lifting section includes a pipe lifting assembly, the top end of which is the operating end and the bottom end of which is the working end. The pipe lifting assembly is hinged to the first base and the hinge point is located between the top end and the bottom end of the pipe lifting assembly. The working end of the pipe lifting assembly is provided with a locking part for locking the high-pressure straight pipe, and the opening direction of the locking part is opposite to the first base.

[0005] As a limitation of the present invention: the lifting tube assembly is hollow inside and is fitted with a handle assembly. The lifting tube assembly is provided with a plurality of first through holes spaced apart along its axial direction. The handle assembly is provided with a plurality of second through holes spaced apart along its axial direction. The handle assembly and the lifting tube assembly are detachably connected by a first locking member. The operating end is the end of the handle assembly away from the lifting tube assembly.

[0006] As a further limitation of the present invention: the lifting assembly is also fitted with a tube lifting assembly, and the tube lifting assembly is provided with a plurality of third through holes spaced apart along its axial direction. The lifting assembly and the tube lifting assembly are detachably connected by a second locking member; the working end is the end of the tube lifting assembly away from the lifting assembly, and the engaging part is provided at the bottom end of the tube lifting assembly.

[0007] As a further limitation of the present invention: the engaging part includes a base fixed to the bottom end of the pipe assembly and a pipe clamp fixed to the base; the shape and size of the pipe clamp are adapted to the shape and size of the high-pressure straight pipe.

[0008] As a further limitation of the present invention: the distance from the hinge point to the operating end is greater than the distance from the hinge point to the working end.

[0009] As another limitation of the present invention: the support part further includes a rolling assembly disposed at the end of the first base near the ground. The rolling assembly includes a connecting shaft and rollers. The connecting shaft is disposed at the bottom end of the first base, and each end of the connecting shaft is provided with a roller. The rollers are rotatably connected to the connecting shaft.

[0010] As a further limitation of the present invention: a height adjustment assembly is provided between the first base and the rolling assembly. The height adjustment assembly includes a fine adjustment assembly and a coarse adjustment assembly. The fine adjustment assembly is threadedly fitted into the coarse adjustment assembly. A third locking member is threadedly fitted onto the external end of the fine adjustment assembly that extends out of the coarse adjustment assembly. The internal thread of the third locking member is opposite to the internal thread of the coarse adjustment assembly. The third locking member abuts against the top of the coarse adjustment assembly. A connecting shaft is provided at the bottom end of the coarse adjustment assembly.

[0011] As a further limitation of the present invention: the height adjustment assembly also includes a tube body sleeved outside the coarse adjustment assembly, the tube body having a plurality of fourth through holes spaced apart along its axial direction, the coarse adjustment assembly having a fifth through hole spaced apart along its axial direction, the tube body and the coarse adjustment assembly being detachably connected by a fourth locking member; the connecting shaft is located at the bottom end of the tube body.

[0012] As a further limitation of the present invention: a fixed seat is provided between the tube body and the connecting shaft, the fixed seat is fixedly connected to the connecting shaft, and the bottom end of the tube body is rotatably disposed in the fixed seat.

[0013] As a further limitation of the present invention: the support part also includes a support assembly, which includes a crossbar and a movable wheel. The crossbar is fixedly connected to the connecting shaft, the axial direction of the crossbar is perpendicular to the axial direction of the connecting shaft, and the movable wheel is disposed at the bottom of the crossbar.

[0014] By adopting the above technical solution, the beneficial effects achieved by the present invention compared with the prior art are as follows: (1) The present invention includes a support part and a lifting part. The support part includes a first base, and the lifting part includes a lifting assembly. The top end of the lifting assembly is an operating end, and the bottom end is a working end. The lifting assembly is hinged on the first base, and the hinge point is located between the top end and the bottom end of the lifting assembly. The working end of the lifting assembly is provided with a locking part, and the distance from the hinge point to the operating end is greater than the distance from the hinge point to the working end. When the present invention is used, the high-pressure straight pipe is locked in the locking part. The construction personnel apply a downward force to the operating end, and the working end of the lifting assembly moves upward, thereby causing the high-pressure straight pipe to be lifted. This is equivalent to the lever principle, which allows the construction personnel to lift the high-pressure straight pipe with less effort and also improves safety. (2) In this invention, the pipe lifting assembly is hollow inside and is fitted with a handle assembly and a pipe raising assembly. The handle assembly and the pipe lifting assembly, and the pipe raising assembly and the pipe lifting assembly are detachably connected, so that the distance from the hinge point to the operating end and the distance from the hinge point to the working end can be adjusted, which is equivalent to changing the lever arm. Different construction personnel can adjust it according to their own operating conditions, making it more applicable. (3) The present invention also includes a rolling component, which makes it easier to move the device with less effort; (4) The present invention includes a height adjustment assembly, which comprises a fine adjustment assembly and a coarse adjustment assembly connected by threads. A third locking member is threaded onto the external end of the fine adjustment assembly extending from the coarse adjustment assembly. The internal thread of the third locking member is opposite to the internal thread of the coarse adjustment assembly, and the third locking member abuts against the top of the coarse adjustment assembly. This structure can fix the relative position of the fine adjustment assembly and the coarse adjustment assembly, preventing the fine adjustment assembly from moving in the vertical direction during operation. The height adjustment assembly also includes a tube sleeved on the outside of the coarse adjustment assembly, which can further adjust the working height. After the position of the coarse adjustment assembly is adjusted to the required height, the tube and the coarse adjustment assembly can be fixed by the fourth locking component. (5) In this invention, a fixed seat is provided between the tube body and the connecting shaft, and the bottom end of the tube body is rotatably set in the fixed seat. This structure enables the tube body to rotate, and the lifting assembly can be adjusted to a suitable direction according to the work requirements.

[0015] In summary, this invention enables the lifting of high-pressure straight pipes with less effort, reducing labor intensity and increasing safety; this invention is applicable to pipe lifting operations in petroleum engineering or other pipeline construction industries. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the lifting section in an embodiment of the present invention; Figure 3 This is a schematic diagram of the support portion in an embodiment of the present invention; Figure 4 This is a cross-sectional view of the support portion in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of an embodiment of the present invention from another perspective; Figure 6 for Figure 5 An enlarged schematic diagram of part A in the middle; Figure 7 This is a schematic diagram of the structure of an embodiment of the present invention from another perspective (one of the rollers is not shown). Figure 8 for Figure 7 Enlarged diagram of part B.

[0018] In the diagram: 1-Support part, 2-Pipe lifting part, 3-First base, 4-Pipe lifting assembly, 41-Operating end, 42-Working end, 43-First through hole, 5-Hinge plate, 6-Clamping part, 61-Base, 62-Pipe clamp, 7-Handle assembly, 71-Second through hole, 8-First locking element, 9-Second locking element, 10-Third locking element, 101-Fastening ring, 102-Rotating handle, 11-Fourth locking element, 12-Pipe lifting assembly, 121-Third through hole, 13-Roller Moving component, 131-connecting shaft, 132-roller, 14-height adjustment component, 141-fine adjustment assembly, 142-coarse adjustment assembly, 143-tube body, 144-fourth through hole, 145-fifth through hole, 15-fixed base, 151-lower base, 152-upper base, 16-support assembly, 161-first crossbar, 162-second crossbar, 163-moving wheel, 17-rotating rod, 18-lifting rod, 19-ear plate, 20-limiting rod, 21-fixed plate. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the pipe-lifting device described herein is a preferred embodiment and is only used for illustration and explanation of the present invention, and does not constitute a limitation thereof.

[0020] like Figures 1 to 8 As shown, this embodiment includes a support part 1 and a lifting part 2 hinged to the support part 1. The lifting part 2 includes a lifting assembly 4. The working end 42 of the lifting assembly 4 is provided with a locking part 6 for locking the high-pressure straight pipe. In use, the high-pressure straight pipe is locked in the locking part 6. The construction personnel apply a downward force to the operating end 41 of the lifting assembly 4, and the working end 42 of the lifting assembly 4 moves upward, thereby causing the high-pressure straight pipe to be lifted, which is equivalent to the lever principle.

[0021] The following is a detailed description of the lifting section 2 and the support section 1.

[0022] 1. Lifting section 2; like Figure 1-2 As shown in Figures 5-6, the lifting section 2 includes a lifting assembly 4, a handle assembly 7, a lifting assembly 12, and a locking section 6.

[0023] The lifting pipe assembly 4 is a cylindrical structure with a hollow interior. The top end of the lifting pipe assembly 4 is the operating end 41, and the bottom end is the working end 42. The lifting pipe assembly 4 is hinged to the first base 3, and the hinge point is located between the top end and the bottom end of the lifting pipe assembly 4. The distance from the hinge point to the operating end 41 is greater than the distance from the hinge point to the working end 42. This structure can ensure that it is easier to lift the high-pressure straight pipe located at the working end 42 when the operating end 41 is pressed down, which is equivalent to the lever principle in the prior art.

[0024] like Figure 1 , 2 As shown, the handle assembly 7 is sleeved inside the lifting tube assembly 4 and positioned near the top of the lifting tube assembly 4. In this embodiment, the handle assembly 7 is also a cylindrical structure. Multiple second through holes 71 are spaced apart along its axial direction on the handle assembly 7, each second through hole 71 penetrating the handle assembly 7 radially. Correspondingly, multiple first through holes 43 are spaced apart along their axial direction on the lifting tube assembly 4, each first through hole 43 penetrating the lifting tube assembly 4 radially. At this time, the operating end 41 is the end of the handle assembly 7 furthest from the lifting tube assembly 4, i.e., the top of the handle assembly 7. During operation, the operating end 41 is the point of force application. The handle assembly 7 and the lifting tube assembly 4 are detachably connected by a first locking member 8. Here, the first locking member 8 uses a pin and a cotter pin for limiting the pin, as used in the prior art. Figure 1 , 2 The cotter pins are not shown. This structure allows for adjustment of the length of the handle assembly 7 extending from the top of the lifting pipe assembly 4. For example, after pulling the handle assembly 7 to the top to a suitable position, the first locking member 8 is used to pass through the first through hole 43 and the second through hole 71 to fix them. Different construction workers can change the lever arm length by adjusting the handle assembly 7, making it more applicable.

[0025] like Figure 1 , 2 As shown, the lifting assembly 12 is sleeved inside the lifting assembly 4 and positioned near the bottom of the lifting assembly 4. In this embodiment, the lifting assembly 12 is also a cylindrical structure. Multiple third through holes 121 are spaced apart along its axial direction on the lifting assembly 12. Each third through hole 121 penetrates the lifting assembly 12 radially. At this time, the working end 42 is the end of the lifting assembly 12 furthest from the lifting assembly 4, i.e., the bottom end of the lifting assembly 12. During operation, the working end 42 is used to lift the high-pressure straight pipe. The lifting assembly 12 and the lifting assembly 4 are detachably connected by a second locking member 9. Here, the second locking member 9 also adopts a pin and a cotter pin for limiting the pin, as used in the prior art. Figure 1 , 2The cotter pin is not shown. This structure allows adjustment of the length of the lifting assembly 12 extending from the bottom of the lifting assembly 4. For example, after the lifting assembly 12 is pulled out to a suitable position, the second locking member 9 is used to pass through the first through hole 43 and the third through hole 121 to fix them in place. The distance from the hinge point to the operating end 41 is adjusted by changing the extension length of the handle assembly 7, and the distance from the hinge point to the working end 42 is adjusted by changing the extension length of the lifting assembly 12, thereby controlling the length of the lever arm.

[0026] like Figure 2 As shown, the engaging part 6 is located at the working end 42 of the lifting assembly 4, i.e., the bottom end of the lifting assembly 12. The opening of the engaging part 6 faces away from the first base 3 and is used to hold the high-pressure straight pipe. Specifically, the engaging part 6 includes a base 61 fixed to the bottom end of the lifting assembly 12 and a pipe clamp 62 fixed to the base 61. The shape and size of the pipe clamp 62 are adapted to the shape and size of the high-pressure straight pipe. Here, "adapted" means that in this embodiment, the pipe clamp 62 has a U-shaped structure to fit the outer contour of the high-pressure straight pipe, and the size of the opening of the pipe clamp 62 is slightly smaller than the diameter of the high-pressure straight pipe so that the high-pressure straight pipe can be inserted. The inner surface of the pipe clamp 62 is provided with anti-slip rubber at the position where it contacts the high-pressure straight pipe to increase the friction between them. Of course, the pipe clamp 62 can also be replaced with any other shape, as long as the high-pressure straight pipe can be inserted.

[0027] II. Support section 1; like Figure 3-4 As shown, the support part 1 includes a first base 3, a height adjustment component 14, a fixed seat 15, a rolling component 13, and a support assembly 16.

[0028] A hinge plate 5 is fixedly mounted on the lifting pipe assembly 4. The hinge plate 5 has a through hole. The first base 3 has a groove for the hinge plate 5 to extend into, and a corresponding through hole is also provided at the position of the hinge plate 5's through hole. After the bolt passes through the through holes of the first base 3 and the hinge plate 5, it is secured with a nut. The hinge plate 5 is fitted onto the bolt, and the hinge plate 5 can rotate around the bolt as its rotation center. (See also...) Figure 5 , 6 .

[0029] The first base 3 is provided with a height adjustment component 14, a fixed seat 15 and a rolling component 13 in sequence facing the ground.

[0030] like Figure 3 , 4 As shown, the height adjustment assembly 14 includes a fine adjustment assembly 141, a coarse adjustment assembly 142, and a tube body 143.

[0031] Both the fine-adjustment assembly 141 and the coarse-adjustment assembly 142 are cylindrical structures. The coarse-adjustment assembly 142 is hollow inside, and has an internal thread located at the top. The fine-adjustment assembly 141 has an external thread on its outer diameter, and the fine-adjustment assembly 141 is threadedly fitted into the coarse-adjustment assembly 142. When the fine-adjustment assembly 141 is rotated, the length of the fine-adjustment assembly 141 extending from the top of the coarse-adjustment assembly 142 will change, thereby adjusting the height of the support part 1. Furthermore, a third locking member 10 is threaded onto the external end of the fine-tuning assembly 141 extending from the coarse-tuning assembly 142. The third locking member 10 includes a fastening ring 101 and a rotating handle 102 fixedly connected to the fastening ring 101. The internal thread of the third locking member 10 rotates in the opposite direction to the internal thread of the coarse-tuning assembly 142. In other words, the fastening ring 101 is fitted onto the fine-tuning assembly 141 and threadedly connected to the fine-tuning assembly 141. The internal thread on the fastening ring 101 rotates in the opposite direction to the internal thread of the coarse-tuning assembly 142. The third locking member 10 abuts against the top of the coarse-tuning assembly 142, that is, the bottom end of the fastening ring 101 abuts against the top of the coarse-tuning assembly 142. If the fine-adjustment assembly 141 tends to rotate upwards during the pipe lifting process, the internal thread on the fastening ring 101 will rotate in the opposite direction to the internal thread of the coarse-adjustment assembly 142, causing the fastening ring 101 to tend to move downwards. However, since the bottom end of the fastening ring 101 abuts against the top end of the coarse-adjustment assembly 142, the fastening ring 101 is restricted from moving downwards, thus preventing the fine-adjustment assembly 141 from rotating upwards. This structure serves to limit the fine-adjustment assembly 141 and prevent it from loosening. It should be noted that the top end of the fine-adjustment assembly 141 is fixedly connected to the first base 3 by bolts and nuts.

[0032] The tube body 143 is hollow inside and fits around the coarse adjustment assembly 142. Multiple fourth through holes 144 are spaced apart along the axial direction of the tube body 143, each penetrating the tube body 143 radially. In this embodiment, there are three fourth through holes 144, but two, four, or other numbers can be used depending on actual needs. Fifth through holes 145 are spaced apart along the axial direction of the coarse adjustment assembly 142, penetrating it radially. The tube body 143 and the coarse adjustment assembly 142 are detachably connected by a fourth locking member 11. This fourth locking member 11 uses bolts and nuts as in the prior art. This structure allows adjustment of the distance from the hinge point on the lifting assembly 4 to the ground according to working needs. For example, after raising the coarse adjustment assembly 142 to a suitable height, bolts are passed through the corresponding fourth through holes 144 and fifth through holes 145, and then tightened with nuts.

[0033] Because the coarse adjustment assembly 142 and the fine adjustment assembly 141 are cylindrical in structure, they are difficult to operate by directly turning or lifting them. Therefore, as follows: Figure 3As shown, a lifting rod 18 is fixed at the upper end of the coarse adjustment assembly 142 to facilitate manual lifting of the coarse adjustment assembly 142; a rotating rod 17 is fixed at the top of the fine adjustment assembly 141 to facilitate manual rotation of the fine adjustment assembly 141.

[0034] like Figure 3 , 4 As shown, a rolling assembly 13 is provided at the bottom end of the tube body 143. The rolling assembly 13 includes a connecting shaft 131 and rollers 132. The connecting shaft 131 is located at the bottom of the tube body 143. A roller 132 is provided at each end of the connecting shaft 131. The rollers 132 and the connecting shaft 131 are rotatably connected by bearings. Since this rotatable connection method is existing technology, it will not be described in detail in this embodiment.

[0035] like Figure 3 , 4 As shown, a fixed seat 15 is provided between the bottom end of the tube body 143 and the connecting shaft 131. The fixed seat 15 is fixedly connected to the connecting shaft 131, and the bottom end of the tube body 143 is rotatably disposed within the fixed seat 15. The fixed seat 15 includes a lower base 151 and an upper base 152 detachably connected by bolts. The lower base 151 is fixed to the connecting shaft 131 by bolts. The upper base 152 and the lower base 151 are provided with grooves for the bottom end of the tube body 143 to extend into. Two bearings are fixedly sleeved on the outer diameter of the extension end of the tube body 143, and the outer rings of the two bearings are fixedly connected to the fixed seat 15. This structure allows the tube body 143, the coarse adjustment assembly 142, and the fine adjustment assembly 141 to rotate relative to the fixed seat 15, thereby changing the direction of the lifting tube assembly 4.

[0036] Of course, if there is no need to lift the coarse adjustment assembly 142 upwards or adjust the direction of the lifting tube assembly 4, the connecting shaft 131 can be directly fixed to the bottom of the coarse adjustment assembly 142.

[0037] Furthermore, this embodiment also includes a limiting component for restricting the rotation of the tube body 143, such as... Figure 3 As shown, the limiting assembly includes an ear plate 19 and a limiting rod 20. The ear plate 19 is fixedly connected to the tube body 143. The ear plate 19 has a through hole, and the upper base 152 has an insertion hole at the corresponding position of the through hole. The limiting rod 20 passes through the through hole and is inserted into the slot. When it is necessary to rotate the tube body 143, the limiting rod 20 can be pulled out to allow rotation. When the device moves forward, to prevent the tube body 143 from rotating, the limiting rod 20 can be inserted into the slot to fix it.

[0038] like Figure 3-5As shown, the support assembly 16 includes a crossbar and a moving wheel 163. The crossbar is fixedly connected to the connecting shaft 131, and the axial direction of the crossbar is perpendicular to the axial direction of the connecting shaft 131. In this embodiment, the crossbar and the connecting shaft 131 are in a cross shape. Specifically, the crossbar includes a first crossbar 161 and a second crossbar 162. The first crossbar 161 and the second crossbar 162 are each located on one side of the connecting shaft 131. The first crossbar 161 is fixedly connected to the lower base 151 through a fixing plate 21. See [link to documentation]. Figure 7 , 8 The second crossbar 162 is also fixedly connected to the lower base 151 via the fixing plate 21. The line connecting the first crossbar 161 and the second crossbar 162 is perpendicular to the connecting shaft 131. (See attached image) Figure 3 A movable wheel 163 is provided at the bottom of the first crossbar 161 and the bottom of the second crossbar 162. The movable wheel 163 has a braking function. After the device is moved to the destination, the braking component on the movable wheel 163 will fix the device in place, and it will not be able to move further. The structure of the movable wheel 163 is prior art and will not be described in detail here.

[0039] When using this embodiment, after moving the device to a suitable position, remove the bolts and nuts between the top of the fine adjustment assembly 141 and the first base 3, remove the first base 3 and the lifting tube assembly 4, and then adjust the coarse adjustment assembly 142 and the fine adjustment assembly 141 according to the working height. After adjustment, use the fourth locking member 11 to fix the coarse adjustment assembly 142 and the tube body 143, and use the third locking member 10 to fix the fine adjustment assembly 141. After the height adjustment is completed, install the lifting tube assembly 4 and the first base 3, and adjust the lifting tube assembly 12 and the handle assembly 7 on the lifting tube assembly 4 according to the required length. After adjustment, fix them with the first locking member 8 and the second locking member 9.

[0040] The state of this device when moving forward is as follows: Figure 1 As shown, when the high-pressure straight pipe needs to be lifted to reach the destination, if there is an angle between the position of the high-pressure straight pipe and this device, the limit rod 20 can be pulled out and the pipe body 143 can be rotated to adjust the direction of the lifting assembly 4. After the high-pressure straight pipe is inserted into the pipe clamp 62, the lifting assembly 4 is rotated back to its original position. Figure 1 In the state where the lifting assembly 4 is located in the middle of the two rollers 132 and the upper limit rod 20 is installed, the pipe body 143 will not rotate automatically during the linear movement of the device.

[0041] When lifting the pipe, the operating end 41 on the lower handle assembly 7 and the working end 42 on the pipe lifting assembly 12 are lifted, thereby lifting the high-pressure straight pipe, which makes it easier to complete the pipe lifting work. Compared with the traditional manual pipe lifting, this device can lift the high-pressure straight pipe more effortlessly, with low labor intensity and high safety.

[0042] It should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pipe-lifting device, characterized in that, Includes a support section and a lifting section hinged to the support section; The support includes a first base; The pipe lifting section includes a pipe lifting assembly, the top end of which is the operating end and the bottom end of which is the working end. The pipe lifting assembly is hinged to the first base and the hinge point is located between the top end and the bottom end of the pipe lifting assembly. The working end of the pipe lifting assembly is provided with a locking part for locking the high-pressure straight pipe, and the opening direction of the locking part is opposite to the first base.

2. The pipe-lifting device according to claim 1, characterized in that, The lifting tube assembly is hollow inside and is fitted with a handle assembly. The lifting tube assembly has multiple first through holes spaced apart along its axial direction, and the handle assembly has multiple second through holes spaced apart along its axial direction. The handle assembly and the lifting tube assembly are detachably connected by a first locking member. The operating end is the end of the handle assembly away from the lifting tube assembly.

3. The pipe-lifting device according to claim 2, characterized in that, The lifting assembly is also fitted with a lowering assembly. The lowering assembly has multiple third through holes spaced along its axial direction. The lifting assembly and the lowering assembly are detachably connected by a second locking member. The working end is the end of the lowering assembly away from the lifting assembly, and the engaging part is located at the bottom end of the lowering assembly.

4. A pipe-lifting device according to claim 3, characterized in that, The engaging part includes a base fixed to the bottom end of the pipe assembly and a pipe clamp fixed to the base; the shape and size of the pipe clamp are adapted to the shape and size of the high-pressure straight pipe.

5. A pipe-lifting device according to claim 4, characterized in that, The distance from the hinge point to the operating end is greater than the distance from the hinge point to the working end.

6. A pipe-lifting device according to any one of claims 1-5, characterized in that, The support also includes a rolling assembly located at the end of the first base near the ground. The rolling assembly includes a connecting shaft and rollers. The connecting shaft is located at the bottom of the first base, and each end of the connecting shaft is provided with a roller. The rollers are rotatably connected to the connecting shaft.

7. A pipe-lifting device according to claim 6, characterized in that, A height adjustment assembly is provided between the first base and the rolling assembly. The height adjustment assembly includes a fine adjustment assembly and a coarse adjustment assembly. The fine adjustment assembly is threaded into the coarse adjustment assembly. A third locking member is threaded on the external end of the fine adjustment assembly that extends out of the coarse adjustment assembly. The internal thread of the third locking member is opposite to the internal thread of the coarse adjustment assembly. The third locking member abuts against the top of the coarse adjustment assembly. A connecting shaft is provided at the bottom end of the coarse adjustment assembly.

8. A pipe-lifting device according to claim 7, characterized in that, The height adjustment assembly also includes a tube body sleeved outside the coarse adjustment assembly. Multiple fourth through holes are spaced apart along the axial direction of the tube body, and fifth through holes are spaced apart along the axial direction of the coarse adjustment assembly. The tube body and the coarse adjustment assembly are detachably connected by a fourth locking member. The connecting shaft is located at the bottom end of the tube body.

9. A pipe-lifting device according to claim 8, characterized in that, A fixed seat is provided between the tube body and the connecting shaft. The fixed seat is fixedly connected to the connecting shaft, and the bottom end of the tube body is rotatably set in the fixed seat.

10. A pipe-lifting device according to claim 9, characterized in that, The support unit also includes a support assembly, which includes a crossbar and a moving wheel. The crossbar is fixedly connected to the connecting shaft, and the axis of the crossbar is perpendicular to the axis of the connecting shaft. The moving wheel is located at the bottom of the crossbar.

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