Pipeline fixing device

Abstract

The utility model relates to a pipeline fixing device which comprises a support, a first lifting piece, a second lifting piece, a first abutting plate, a second abutting plate, a third abutting plate, a fourth abutting plate and an air bag assembly. The first lifting part drives the first abutting plate to ascend and descend to be matched with the third abutting plate to fix the pipeline, the second lifting part drives the second abutting plate to ascend and descend to be matched with the fourth abutting plate to fix the pipeline, and the air bag assembly is used for abutting against the pipeline. The air bag assemblies are arranged on the first abutting plate and the second abutting plate, when the pipeline is fixed, the air bag assemblies are inflated and expanded, gaps between the pipeline and the first abutting plate and gaps between the pipeline and the second abutting plate are filled, the contact area between the pipeline and the air bag assemblies is increased, and when the pipeline is fixed, the air bag assemblies are kept in a high-air-pressure state, and the pipeline is stably fixed; the pipeline fixing device can adapt to fixing work of pipelines of different sizes, and the good fixing effect can be achieved when the pipelines of different sizes are fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline installation, and more specifically, to a pipeline fixing device. Background Art

[0002] The hydrogen gas delivery pipeline has high requirements for air tightness when in use. Welding connection is required during installation. During the welding process, the front and rear pipelines must be relatively fixed. Manual hand-held fixation cannot meet the welding requirements, and equipment is required to fix the front and rear pipelines.

[0003] In the prior art, a hydrogen gas delivery pipeline structure that is easy to install includes a base plate, and the four corner areas of the top of the base plate are fixedly connected to hydraulic cylinders, and the top of the output shaft of each hydraulic cylinder is fixedly connected to a top plate, and the top front and rear of the top of the top plate are provided with support components, and the support component includes a mounting plate, the bottom end of the mounting plate is fixedly connected to the top of the top plate, and the top of the mounting plate is provided with a groove, and the inner walls of the groove are rotatably connected to a left support plate and a right support plate through a rotating shaft, and the top of the top plate is provided with an abutment plate, and the abutment plate includes a fan-shaped plate. The device clamps the pipeline by means of the fan-shaped plate, the left support plate and the right support plate to keep the pipeline fixed; when the diameters of the pipeline and the fan-shaped plate, the left support plate and the right support plate are the same, the contact area between the hydrogen gas delivery pipeline and the support plate is larger, and the clamping effect is better; however, when the size of the hydrogen gas delivery pipeline is smaller, the fan-shaped plate, the left support plate and the right support plate are in line contact with the pipeline, and the contact area is smaller; although anti-slip pads are provided on the surfaces of the fan-shaped plate, the left support plate and the right support plate, the contact area is still limited, and the clamping effect is greatly reduced; shaking or movement is likely to occur during the pipeline installation and welding process; and the device cannot be well compatible with the fixation of pipelines of different sizes in use. Utility Model Content

[0004] In order to overcome the defects in the prior art that the pipeline fixing device used in welding hydrogen pipelines is not well compatible with pipelines of different sizes and has a poor clamping effect on small-sized pipelines, the utility model provides a pipeline fixing device, which increases the contact area between the device and the pipeline when clamping small-sized pipelines, ensures the clamping effect, and avoids pipeline shaking or movement.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is: a pipe fixing device, comprising: a bracket, a first lifting member installed at one end of the bracket, a second lifting member installed at the other end of the bracket, a first abutment plate and a second abutment plate respectively installed on the first lifting member and the second lifting member, a third abutment plate and a fourth abutment plate respectively arranged below the first abutment plate and the second abutment plate, and an airbag assembly respectively installed on the first abutment plate and the second abutment plate; the first lifting member drives the first abutment plate to rise and fall to cooperate with the third abutment plate to fix the pipe, the second lifting member drives the second abutment plate to rise and fall to cooperate with the fourth abutment plate to fix the pipe, and the airbag assembly is used to abut against the pipe.

[0006] During the welding process, the front and rear pipes are placed on the third abutment plate and the fourth abutment plate respectively, the first lifting member and the second lifting member drive the first abutment plate and the second abutment plate to press down, the first abutment plate cooperates with the third abutment plate to clamp one pipe together, and the second abutment plate cooperates with the fourth abutment plate to clamp another pipe together, the first abutment plate and the second abutment plate are respectively connected with airbag components, and the airbag components are located between the pipe and the first abutment plate or the second abutment plate. When clamping the pipe, the airbag component contacts the pipe and inflates, so that the airbag component can fill the gap between the first abutment plate or the second abutment plate and the pipe to increase the contact area between the device and the pipe. At the same time, the airbag component maintains a high pressure state during operation, and uses gas pressure to stably fix the pipe, thereby avoiding shaking or movement of the pipe, facilitating the welding of the pipe, and helping to improve the quality of pipe welding. Specifically, the first abutment plate, the second abutment plate, the third abutment plate and the fourth abutment plate are respectively connected to the bracket or the first lifting member or the second lifting member through different connecting frames. Furthermore, the first abutment plate, the second abutment plate, the third abutment plate and the fourth abutment plate are all arc-shaped plates. Furthermore, two first lifting members and two second lifting members are respectively connected to the bracket, and the two first lifting members simultaneously drive the first abutment plate to be lifted and lowered, and the two second lifting members simultaneously drive the second abutment plate to be lifted and lowered. Furthermore, a plurality of moving wheels are provided at the bottom of the bracket.

[0007] Preferably, the airbag assembly includes an abutment airbag installed on the working surface of the first abutment plate, an air supply pipe connected to the abutment airbag, and an inflation assembly and a valve assembly respectively connected to the air supply pipe. The abutment airbag is used to abut against the pipe, and the valve assembly is used to maintain the air pressure of the abutment airbag. The connection method between the airbag assembly and the second abutment plate is consistent with that of the first abutment plate.

[0008] In the airbag assembly, the abutment airbag is installed on the working surface of the first abutment plate, which is the surface abutting against the pipeline. The inflation assembly is connected to the abutment airbag through the air supply pipe and inflates the abutment airbag. The valve assembly is used to maintain the air pressure of the abutment airbag. After the welding work is completed, the abutment airbag is also deflated through the valve assembly. The inflation assembly and the valve assembly can be installed at any position on the device, for example, they can be installed at any one or more of the first lifting member, the second lifting member, the first abutment plate, and the second abutment plate. The inflation assembly can be connected to external high-pressure gas, or an electric or manual inflation pump can be used.

[0009] Preferably, the valve assembly includes a first one-way valve installed on the air supply pipe, an exhaust pipe connected to the air supply pipe, and an air release valve installed on the exhaust pipe, the first one-way valve is located between the inflation assembly and the abutment airbag, and the air supply pipe is located between the first one-way valve and the abutment airbag.

[0010] When the inflatable component is inflated, the air flow circulates in the air supply pipe and flows into the abutment airbag through the first one-way valve. At this time, the deflation valve is in a closed state. When the inflatable component stops inflating, the first one-way valve prevents the gas from flowing back, so that the abutment airbag maintains a high-pressure state. After the work is completed, the deflation valve is opened to release the gas in the abutment airbag.

[0011] Preferably, the inflation assembly includes a piston cylinder installed on the air supply pipe, an air intake pipe connected to the piston cylinder, and a second one-way valve installed on the air intake pipe. When the piston cylinder is working, it inhales air from the air intake pipe and fills the air into the abutting airbag.

[0012] The piston cylinder can be manually driven or electrically driven. Specifically, the piston cylinder includes a cylinder body and a piston rod. The air inlet pipe and the air supply pipe are both connected to the cylinder body. When the piston rod moves away from the cylinder body, the gas outside the device flows through the air supply pipe and is sucked into the cylinder body of the piston cylinder through the second one-way valve. When the piston rod moves toward the cylinder body, the gas in the cylinder body is compressed and cannot flow out from the second one-way valve, and is then pushed into the air supply pipe and flows into the abutment airbag through the first one-way valve. The piston cylinder can inflate the abutment airbag by reciprocating.

[0013] Preferably, the first abutment plate includes a fixed plate installed on the first lifting member, a first rotating plate and a second rotating plate respectively rotatably installed on both sides of the fixed plate, and the fixed plate is connected to a driving assembly, and the driving assembly is used to simultaneously drive the first rotating plate and the second rotating plate to rotate.

[0014] The driving assembly drives the first rotating plate and the second rotating plate to retract toward the middle at the same time, thereby increasing the clamping effect on the pipe. The driving assembly can select a rotating driving unit or a lifting driving unit. When the lifting driving unit is used, a connecting rod needs to be provided to be rotatably connected with the first rotating plate and the second rotating plate.

[0015] Preferably, the first rotating plate and the second rotating plate are each connected to one of the airbag assemblies, the abutting airbags are respectively arranged on the working surfaces of the first rotating plate and the second rotating plate, and the structure of the second abutting plate is consistent with that of the first abutting plate.

[0016] The first rotating plate and the second rotating plate are respectively connected to an airbag assembly, and the abutting airbags in the two airbag assemblies are respectively arranged on the working surfaces of the first rotating plate and the second rotating plate, and use air pressure to squeeze the pipeline from both sides during operation, further increasing the clamping effect of the pipeline, and also facilitating the stable clamping of small-sized pipelines. The structure of the second abutting plate is consistent with that of the first abutting plate.

[0017] Preferably, the first rotating plate and the second rotating plate are respectively connected with rope-like members, the piston cylinder is rotatably connected with a roller, and the rope-like member is connected with the piston rod of the piston cylinder via the roller.

[0018] The two ends of the rope-like member are respectively connected to the piston rod and the first rotating plate or the second rotating plate. When the driving assembly drives the first rotating plate and the second rotating plate to rotate, the first rotating plate and the second rotating plate respectively pull different rope-like members to move, thereby pulling the piston rod to move toward the cylinder body, squeezing the gas in the cylinder body, and further inflating the abutting airbag to increase the working air pressure of the abutting airbag. The rotating connecting roller on the piston cylinder is used to avoid the rope-like member from directly rubbing against the piston rod, thereby avoiding friction and damaging the piston rod. In addition, when the piston cylinder needs to perform preliminary inflation on the abutting airbag, the rope-like member needs to be removed from the roller to avoid the piston rod being pulled, so that the piston rod has space to move. After the preliminary inflation is completed, the rope-like member is wound back on the roller. Further, a return spring is connected to the piston rod of the piston cylinder, and the two ends of the return spring are respectively abutted on the cylinder body and the piston rod. When the piston rod moves toward the cylinder body, the return spring is compressed, and when the piston rod moves away from the cylinder body, the return spring stretches and resets. Further, the rope-like member and the piston rod of the piston cylinder are detachably connected.

[0019] Preferably, the driving assembly includes a first screw rotatably connected to the fixed plate, a lifting block threadedly connected to the first screw, and two connecting rods rotatably installed on both sides of the lifting block; one end of the two connecting rods away from the lifting block is rotatably connected to the first rotating plate and the second rotating plate respectively, and the first screw is axially fixed relative to the fixed plate.

[0020] The first screw is rotatably connected to the fixed plate, specifically, is rotatably connected to a connecting frame connected to the fixed plate. The axial direction of the first screw is fixed relative to the fixed plate, and the lifting block is rotatably connected to the connecting rod. The lifting block will not rotate under the restriction of the connecting rod. When the first screw is rotated, the lifting block will be lifted and lowered relative to the fixed plate, and the two connecting rods will be driven to move together during the lifting, thereby driving the first rotating plate and the second rotating plate to rotate at the same time to clamp the pipeline.

[0021] Preferably, the bracket includes a first frame body and a second frame body slidably connected to the first frame body, the first lifting member is installed on the first frame body, and the second lifting member is installed on the second frame body.

[0022] The first frame is slidably connected to the second frame, and is used to adjust the distance between the first and third abutment plates and the second and fourth abutment plates, thereby adjusting the distance between the front and rear pipe clamping positions to facilitate welding. Furthermore, a fixing screw is threadedly connected to the second frame, and a groove is provided on the first frame. The fixing screw abuts against the bottom of the groove, and the fixing screw is tightened to relatively fix the position between the first frame and the second frame.

[0023] Preferably, a second screw is rotatably mounted on the second frame, the second screw is threadedly connected to the first frame, and the second screw is axially fixed relative to the first frame.

[0024] The first frame is moved relative to the second frame by rotating the second screw rod, thereby adjusting the distance between the front and rear pipe clamping positions.

[0025] Compared with the prior art, the utility model has the following beneficial effects:

[0026] By arranging an airbag assembly on the first abutment plate and the second abutment plate, the airbag assembly is inflated when fixing the pipeline, and the gap between the pipeline and the first abutment plate and the second abutment plate is filled to increase the contact area with the pipeline. When fixing the pipeline, the airbag assembly maintains a high air pressure state to stably fix the pipeline, so that the device can adapt to the fixing work of pipelines of different sizes, and can achieve a better fixing effect when fixing pipelines of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of a pipeline fixing device of the utility model;

[0028] Figure 2 It is a structural schematic diagram of an air bag component and a driving component of a pipeline fixing device of the utility model;

[0029] Figure 3 yes Figure 2 A magnified schematic diagram of part A.

[0030] In the figure:

[0031] 1. bracket; 101. first frame; 102. second frame;

[0032] 2. First lifting member; 3. Second lifting member; 4. First abutting plate; 5. Second abutting plate; 6. Third abutting plate; 7. Fourth abutting plate;

[0033] 8. Airbag assembly; 801. Abutting airbag; 802. Air delivery pipe; 803. Inflating assembly; 804. Valve assembly; 805. First one-way valve; 806. Exhaust pipe; 807. Air release valve; 808. Piston cylinder; 8081. Cylinder body; 8082. Piston rod; 809. Inlet pipe; 810. Second one-way valve;

[0034] 9. Fixed plate; 10. First rotating plate; 11. Second rotating plate;

[0035] 12. Driving assembly; 1201. First screw rod; 1202. Lifting block; 1203. Connecting rod;

[0036] 13. Rope-like member; 14. Roller; 15. Second screw rod; 16. Connecting frame; 17. Fixing screw. DETAILED DESCRIPTION

[0037] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0038] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0039] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0040] Example 1

[0041] like Figure 1-2 As shown, a pipeline fixing device includes: a bracket 1, a first lifting member 2 installed at one end of the bracket 1, a second lifting member 3 installed at the other end of the bracket 1, a first abutment plate 4 and a second abutment plate 5 installed on the first lifting member 2 and the second lifting member 3 respectively, a third abutment plate 6 and a fourth abutment plate 7 respectively arranged below the first abutment plate 4 and the second abutment plate 5, and an airbag assembly 8 respectively installed on the first abutment plate 4 and the second abutment plate 5; the first lifting member 2 drives the first abutment plate 4 to rise and fall to cooperate with the third abutment plate 6 to fix the pipeline, the second lifting member 3 drives the second abutment plate 5 to rise and fall to cooperate with the fourth abutment plate 7 to fix the pipeline, and the airbag assembly 8 is used to abut against the pipeline.

[0042] During the welding process, the front and rear pipes are placed on the third abutment plate 6 and the fourth abutment plate 7 respectively, the first lifting member 2 and the second lifting member 3 drive the first abutment plate 4 and the second abutment plate 5 to press down, the first abutment plate 4 cooperates with the third abutment plate 6 to clamp one pipe together, and the second abutment plate 5 cooperates with the fourth abutment plate 7 to clamp the other pipe together, the first abutment plate 4 and the second abutment plate 5 are respectively connected with the airbag assembly 8, and the airbag assembly 8 is located between the pipe and the first abutment plate 4 or the second abutment plate 5. When clamping the pipe, the airbag assembly 8 contacts the pipe and inflates, so that the airbag assembly 8 can fill the gap between the first abutment plate 4 or the second abutment plate 5 and the pipe to increase the contact area between the device and the pipe. At the same time, the airbag assembly 8 maintains a high pressure state during operation, and uses gas pressure to stably fix the pipe, thereby avoiding shaking or moving of the pipe, facilitating the welding of the pipe, and helping to improve the quality of pipe welding. Specifically, the first abutment plate 4, the second abutment plate 5, the third abutment plate 6 and the fourth abutment plate 7 are connected to the bracket 1 or the first lifting member 2 or the second lifting member 3 through different connecting frames 16. Further, the first abutment plate 4, the second abutment plate 5, the third abutment plate 6 and the fourth abutment plate 7 are all arc-shaped plates. Further, the bracket 1 is respectively connected with two first lifting members 2 and two second lifting members 3, the two first lifting members 2 drive the first abutment plate 4 to be lifted and lowered at the same time, and the two second lifting members 3 drive the second abutment plate 5 to be lifted and lowered at the same time. Further, a plurality of moving wheels are provided at the bottom of the bracket 1.

[0043] Furthermore, both the first lifting member 2 and the second lifting member 3 are cylinders.

[0044] The beneficial effects of this embodiment are as follows: by arranging the airbag assembly 8 on the first abutment plate 4 and the second abutment plate 5, the airbag assembly 8 is inflated when fixing the pipeline, and the gap between the pipeline and the first abutment plate 4 and the second abutment plate 5 is filled to increase the contact area with the pipeline. When fixing the pipeline, the airbag assembly 8 maintains a high air pressure state to stably fix the pipeline, so that the device can adapt to the fixing work of pipelines of different sizes, and can achieve a better fixing effect when fixing pipelines of different sizes.

[0045] Example 2

[0046] like Figure 2-3 As shown, based on Example 1, the difference from Example 1 is that:

[0047] The airbag assembly 8 includes an abutting airbag 801 installed on the working surface of the first abutting plate 4, an air supply pipe 802 connected to the abutting airbag 801, an inflation assembly 803 and a valve assembly 804 respectively connected to the air supply pipe 802, the abutting airbag 801 is used to abut against the pipeline, the valve assembly 804 is used to maintain the air pressure of the abutting airbag 801, and the connection method between the airbag assembly 8 and the second abutting plate 5 is consistent with that of the first abutting plate 4. The valve assembly 804 includes a first one-way valve 805 installed on the air supply pipe 802, an exhaust pipe 806 connected to the air supply pipe 802, and a deflation valve 807 installed on the exhaust pipe 806. The first one-way valve 805 is located between the inflation assembly 803 and the abutting airbag 801, and the air supply pipe 802 is located between the first one-way valve 805 and the abutting airbag 801. The inflation assembly 803 includes a piston cylinder 808 installed on the air supply pipe 802, an air intake pipe 809 connected to the piston cylinder 808, and a second one-way valve 810 installed on the air intake pipe 809. When the piston cylinder 808 is working, air is sucked from the air intake pipe 809 and the air is filled into the abutment airbag 801. The first abutment plate 4 includes a fixed plate 9 installed on the first lifting member 2, a first rotating plate 10 and a second rotating plate 11 which are respectively rotatably installed on both sides of the fixed plate 9. The fixed plate 9 is connected to a driving assembly 12, and the driving assembly 12 is used to simultaneously drive the first rotating plate 10 and the second rotating plate 11 to rotate. The first rotating plate 10 and the second rotating plate 11 are each connected to an airbag assembly 8, and the abutment airbags 801 are respectively arranged on the working surfaces of the first rotating plate 10 and the second rotating plate 11. The structure of the second abutment plate 5 is consistent with that of the first abutment plate 4. The first rotating plate 10 and the second rotating plate 11 are respectively connected with a rope-like member 13, the piston cylinder 808 is rotatably connected with a roller 14, and the rope-like member 13 is connected to the piston rod 8082 of the piston cylinder 808 via the roller 14. The driving assembly 12 includes a first screw rod 1201 rotatably connected to the fixed plate 9, a lifting block 1202 threadedly connected to the first screw rod 1201, and two connecting rods 1203 rotatably mounted on both sides of the lifting block 1202; the ends of the two connecting rods 1203 away from the lifting block 1202 are respectively rotatably connected to the first rotating plate 10 and the second rotating plate 11, and the first screw rod 1201 is axially fixed relative to the fixed plate 9.

[0048] In the airbag assembly 8, the abutting airbag 801 is installed on the working surface of the first abutting plate 4, which is the surface abutting against the pipeline. The inflation assembly 803 is connected to the abutting airbag 801 through the air supply pipe 802 and inflates the abutting airbag 801. The valve assembly 804 is used to maintain the air pressure of the abutting airbag 801. After the welding work is completed, the abutting airbag 801 is also deflated through the valve assembly 804. The inflation assembly 803 and the valve assembly 804 can be installed at any position on the device, for example, they can be installed at any one or more of the first lifting member 2, the second lifting member 3, the first abutting plate 4 and the second abutting plate 5. The inflation assembly 803 can be connected to an external high-pressure gas, or an electric or manual inflation pump can be used. When the inflatable component 803 is inflated, the air flows through the air supply pipe 802 and flows into the abutting airbag 801 through the first one-way valve 805. At this time, the air release valve 807 is in a closed state. When the inflatable component 803 stops inflating, the first one-way valve 805 prevents the gas from flowing back, so that the abutting airbag 801 maintains a high pressure state. After the work is completed, the air release valve 807 is opened to release the gas in the abutting airbag 801. The piston cylinder 808 can be manually driven or electrically driven. Specifically, the piston cylinder 808 includes a cylinder body 8081 and a piston rod 8082. The air inlet pipe 809 and the air supply pipe 802 are both connected to the cylinder body 8081. When the piston rod 8082 moves away from the cylinder body 8081, the gas outside the device flows through the air supply pipe 802 and is sucked into the cylinder body 8081 of the piston cylinder 808 through the second one-way valve 810. When the piston rod 8082 moves toward the cylinder body 8081, the gas in the cylinder body 8081 is compressed and cannot flow out from the second one-way valve 810, and is then pushed into the air supply pipe 802, and flows into the abutment airbag 801 through the first one-way valve 805. The piston cylinder 808 can reciprocate to inflate the abutment airbag 801. The drive assembly 12 simultaneously drives the first rotating plate 10 and the second rotating plate 11 to converge toward the middle, thereby increasing the clamping effect on the pipeline. The drive assembly 12 can select a rotation drive unit or a lifting drive unit. When the lifting drive unit is used, a connecting rod needs to be set to be rotatably connected with the first rotating plate 10 and the second rotating plate 11. The first rotating plate 10 and the second rotating plate 11 are respectively connected to an airbag assembly 8, and the abutting airbags 801 in the two airbag assemblies 8 are respectively arranged on the working surfaces of the first rotating plate 10 and the second rotating plate 11, and use air pressure to squeeze the pipeline from both sides during operation, further increasing the clamping effect of the pipeline, and also facilitating the stable clamping of small-sized pipelines. The structure of the second abutting plate 5 is consistent with that of the first abutting plate 4.

[0049] The two ends of the rope-like member 13 are connected to the piston rod 8082 and the first rotating plate 10 or the second rotating plate 11 respectively. When the driving assembly 12 drives the first rotating plate 10 and the second rotating plate 11 to rotate, the first rotating plate 10 and the second rotating plate 11 pull different rope-like members 13 to move respectively, thereby pulling the piston rod 8082 to move toward the cylinder body 8081, squeezing the gas in the cylinder body 8081, and further inflating the abutting airbag 801 to increase the working air pressure of the abutting airbag 801. The rotating connecting roller 14 on the piston cylinder 808 is used to prevent the rope-like member 13 from directly rubbing against the piston rod 8082, thereby preventing the piston rod 8082 from being damaged by friction. In addition, when the piston cylinder 808 needs to perform preliminary inflation on the abutting airbag 801, the rope-like member 13 needs to be removed from the roller 14 to prevent the piston rod 8082 from being pulled, so that the piston rod 8082 has room to move. After the preliminary inflation is completed, the rope-like member 13 is wound back onto the roller 14. Furthermore, a return spring is connected to the piston rod 8082 of the piston cylinder 808, and the two ends of the return spring are respectively in contact with the cylinder body 8081 and the piston rod 8082. When the piston rod 8082 moves toward the cylinder body 8081, the return spring is compressed, and when the piston rod 8082 moves away from the cylinder body 8081, the return spring is extended and reset. Furthermore, the rope-like member 13 and the piston rod 8082 of the piston cylinder 808 are detachably connected. The first screw 1201 is rotatably connected to the fixed plate 9, specifically, is rotatably connected to the connecting frame 16 connected to the fixed plate 9. The first screw 1201 is axially fixed relative to the fixed plate 9, and the lifting block 1202 is rotatably connected to the connecting rod 1203. The lifting block 1202 will not rotate under the restriction of the connecting rod 1203. When the first screw 1201 is rotated, the lifting block 1202 will be lifted and lowered relative to the fixed plate 9, and the two connecting rods 1203 will be driven to move together during the lifting, thereby driving the first rotating plate 10 and the second rotating plate 11 to rotate at the same time to clamp the pipeline.

[0050] The remaining features and working principles of this embodiment are consistent with those of Embodiment 1.

[0051] Example 3

[0052] like Figure 1 As shown, based on Example 1 or Example 2, Example 1 or Example 2 is further limited, and the difference is that:

[0053] The bracket 1 includes a first frame 101 and a second frame 102 slidably connected to the first frame 101, the first lifting member 2 is installed on the first frame 101, and the second lifting member 3 is installed on the second frame 102. The second frame 102 is rotatably mounted with a second screw 15, the second screw 15 is threadedly connected to the first frame 101, and the second screw 15 is axially fixed relative to the first frame 101.

[0054] The first frame 101 is slidably connected to the second frame 102, and is used to adjust the distance between the first abutment plate 4 and the third abutment plate 6 and the second abutment plate 5 and the fourth abutment plate 7, thereby adjusting the distance between the front and rear pipe clamping positions, so as to facilitate welding. Furthermore, a fixing screw 17 is threadedly connected to the second frame 102, and a groove is provided on the first frame 101. The fixing screw 17 abuts against the bottom of the groove. Tightening the fixing screw 17 makes the position between the first frame 101 and the second frame 102 relatively fixed. The first frame 101 is moved relative to the second frame 102 by rotating the second screw 15, thereby adjusting the distance between the front and rear pipe clamping positions.

[0055] The rest of the working principle and working process of this embodiment are consistent with those of Embodiment 1 or Embodiment 2.

[0056] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A pipeline fixing device, characterized in that: include: A bracket (1), a first lifting member (2) installed at one end of the bracket (1), a second lifting member (3) installed at the other end of the bracket (1), a first abutment plate (4) and a second abutment plate (5) respectively installed on the first lifting member (2) and the second lifting member (3), a third abutment plate (6) and a fourth abutment plate (7) respectively arranged below the first abutment plate (4) and the second abutment plate (5), and an airbag assembly (8) respectively installed on the first abutment plate (4) and the second abutment plate (5); the first lifting member (2) drives the first abutment plate (4) to rise and fall to cooperate with the third abutment plate (6) to fix the pipeline, the second lifting member (3) drives the second abutment plate (5) to rise and fall to cooperate with the fourth abutment plate (7) to fix the pipeline, and the airbag assembly (8) is used to abut against the pipeline; The airbag assembly (8) comprises an abutment airbag (801) mounted on the working surface of the first abutment plate (4), an air supply pipe (802) connected to the abutment airbag (801), and an inflation assembly (803) and a valve assembly (804) respectively connected to the air supply pipe (802); the abutment airbag (801) is used for abutting against the pipeline, and the valve assembly (804) is used for maintaining the air pressure of the abutment airbag (801); the connection method between the airbag assembly (8) and the second abutment plate (5) is consistent with that of the first abutment plate (4).

2. A pipeline fixing device according to claim 1, characterized in that: The valve assembly (804) includes a first one-way valve (805) installed on the air supply pipe (802), an exhaust pipe (806) connected to the air supply pipe (802), and an air release valve (807) installed on the exhaust pipe (806), wherein the first one-way valve (805) is located between the inflation assembly (803) and the abutment airbag (801), and the air supply pipe (802) is located between the first one-way valve (805) and the abutment airbag (801).

3. A pipeline fixing device according to claim 2, characterized in that: The inflation assembly (803) comprises a piston cylinder (808) installed on the air supply pipe (802), an air intake pipe (809) connected to the piston cylinder (808), and a second one-way valve (810) installed on the air intake pipe (809). When the piston cylinder (808) is in operation, it inhales air from the air intake pipe (809) and inflates the air into the abutting airbag (801).

4. A pipeline fixing device according to claim 3, characterized in that: The first abutment plate (4) comprises a fixed plate (9) mounted on the first lifting member (2), a first rotating plate (10) and a second rotating plate (11) respectively rotatably mounted on both sides of the fixed plate (9), the fixed plate (9) being connected to a driving assembly (12), the driving assembly (12) being used for simultaneously driving the first rotating plate (10) and the second rotating plate (11) to rotate.

5. A pipeline fixing device according to claim 4, characterized in that: The first rotating plate (10) and the second rotating plate (11) are each connected to an airbag assembly (8), the abutment airbag (801) is respectively arranged on the working surfaces of the first rotating plate (10) and the second rotating plate (11), and the structure of the second abutment plate (5) is consistent with that of the first abutment plate (4).

6. A pipeline fixing device according to claim 5, characterized in that: The first rotating plate (10) and the second rotating plate (11) are respectively connected to a rope-like member (13); the piston cylinder (808) is rotatably connected to a roller (14); the rope-like member (13) is connected to a piston rod (8082) of the piston cylinder (808) via the roller (14).

7. A pipeline fixing device according to claim 4, characterized in that: The driving assembly (12) comprises a first screw rod (1201) rotatably connected to the fixed plate (9), a lifting block (1202) threadedly connected to the first screw rod (1201), and two connecting rods (1203) rotatably mounted on both sides of the lifting block (1202); one end of the two connecting rods (1203) away from the lifting block (1202) is rotatably connected to the first rotating plate (10) and the second rotating plate (11), respectively, and the first screw rod (1201) is axially fixed relative to the fixed plate (9).

8. A pipeline fixing device according to any one of claims 1 to 7, characterized in that: The bracket (1) comprises a first frame body (101) and a second frame body (102) slidably connected to the first frame body (101); the first lifting member (2) is mounted on the first frame body (101); and the second lifting member (3) is mounted on the second frame body (102).

9. A pipeline fixing device according to claim 8, characterized in that: The second frame (102) is rotatably mounted with a second screw rod (15), the second screw rod (15) is threadedly connected to the first frame (101), and the second screw rod (15) is axially fixed relative to the first frame (101).

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