Adjustable constant force loading device

Abstract

The utility model provides an adjustable constant force loading device. The device comprises a first stress rod, a first gear, a shell, a second stress rod, a second gear, a motor, a third gear, a first fixed spring seat, a first spring, a first sliding spring seat, a ball screw, a first bearing seat, a second bearing seat, a second sliding spring seat, a second spring and a second fixed spring seat. According to the adjustable constant force loading device, the constant force can be adjusted through the motor, the complexity of manual operation is reduced, meanwhile, the force can be adjusted more accurately, the device can automatically adjust the force according to changes of internal and external conditions of a pipeline, the set constant force is kept unchanged, and the working efficiency is improved. The pipeline fastening device is simple in structure, convenient to disassemble and high in safety and reliability, the safety of the pipeline joint is effectively guaranteed, the pipeline transportation safety is improved, the service life of the pipeline transportation is prolonged, the maintenance frequency of the pipeline fastening device is reduced, and the transportation benefit is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline closing technology field, concretely is a kind of adjustable constant force loading device for pipeline closing. BACKGROUND

[0002] Pipeline transportation is a kind of long-distance energy transfer transport mode using pipeline as transport tool. To ensure the safe operation of energy transport pipeline, the structural frame design of pipeline is particularly important. Long-distance pipeline transport line is usually connected by section by section pipeline, and the internal pressure constant of pipeline connection is the basic condition for realizing pipeline transportation. Due to the influence of many factors such as external environmental conditions, pipeline internal temperature, pipeline material and internal pressure, the stress of pipeline may change at any time, causing deformation and damage of pipeline. Therefore, a kind of adjustable constant force loading device is needed to keep the internal pressure of pipeline connection constant at all times, to ensure that the pipeline will not be deformed and damaged due to various factors. SUMMARY

[0003] In view of the problem that the internal pressure of pipeline transportation connection needs to be kept constant, the utility model provides an adjustable constant force loading device, which can keep the constant force at both ends of the constant force loading device adjusted by motor, and can keep appropriate constant force under changing external and internal conditions, so that the connected pipeline will not be deformed and damaged.

[0004] The utility model technical scheme is as follows: an adjustable constant force loading device, characterized in that the device comprises a first stress rod, a first gear, a shell, a second stress rod, a second gear, a motor, a third gear, a first fixed spring seat, a first spring, a first sliding spring seat, a ball screw, a first bearing seat, a second bearing seat, a second sliding spring seat, a second spring and a second fixed spring seat.

[0005] The shell comprises a bottom plate and two strip-shaped frames, and the two strip-shaped frames are connected in parallel on the front and rear sides of the upper surface of the bottom plate. A sliding groove of the same size is formed in the same height position in the middle of the opposite inner sides of the two strip-shaped frames, and the sliding groove is arranged in parallel with the strip-shaped frame along the left-right direction and has the same length as the strip-shaped frame.

[0006] The first stress rod is composed of a stress plate, two connecting plates and a first L-shaped connecting plate, and the second stress rod is composed of a second L-shaped connecting plate and a positioning plate. The two connecting plates of the first stress rod are fixedly arranged in parallel on the upper and lower sides of the rear side of the right side of the stress plate, the end of the long side of the first L-shaped connecting plate is fixedly arranged in the middle of the front side of the right side of the stress plate, and the short side of the first L-shaped connecting plate is parallel to and opposite to the stress plate. The positioning plate of the second stress rod is connected to the end of the short side of the second L-shaped connecting plate, and is parallel to and opposite to the long side of the second L-shaped connecting plate.

[0007] The No. 1 force-bearing rod and the No. 2 force-bearing rod are respectively set on the left and right sides of the outer shell. The front side of the long side of the No. 1 L-shaped connecting plate of the No. 1 force-bearing rod is set in the groove of the strip frame on the front side of the outer shell, and the No. 1 force-bearing rod is slidably connected to the groove.

[0008] The rear side of the long side of the second L-shaped connecting plate of the second force rod is set in the groove of the strip frame on the rear side of the shell, and the front side of the positioning plate of the second force rod is set in the groove of the strip frame on the front side of the shell. The second force rod is slidably connected to the two grooves.

[0009] The end of the long side of the second L-shaped connecting plate of the second force-bearing rod is set between the two connecting plates of the first force-bearing rod, and the thickness of the long side of the second L-shaped connecting plate is equal to the distance between the two connecting plates of the first force-bearing rod. The end of the long side of the second L-shaped connecting plate is slidably connected to the two connecting plates of the first force-bearing rod. The short sides of the force-bearing plate of the first force-bearing rod and the second L-shaped connecting plate of the second force-bearing rod are parallel and directly opposite each other.

[0010] A gear shaft is fixedly installed on the middle of the left side of the upper surface of the bottom plate of the outer shell by a bracket. The first gear is installed on the gear shaft and its movement is circumferential rotation on the water surface. A rack structure is provided on the rear side of the left side of the long side of the first L-shaped connecting plate of the first force rod, and a rack structure is also provided on the front side of the left side of the long side of the second L-shaped connecting plate. Both rack structures are meshed with the first gear.

[0011] A rectangular through hole running in the front-to-back direction is provided on the right side of the bottom plate of the outer casing. The lower end of the No. 2 gear, which is fixed in the middle of the ball screw, is located in the rectangular through hole. The ball screw is positioned above the rectangular through hole by the No. 1 bearing seat and the No. 2 bearing seat, which are respectively fixed on the upper surface of the bottom plate on the left and right sides of the rectangular through hole. The central axis of the No. 2 gear coincides with the central axis of the ball screw, and the ball screw is parallel to the strip frame of the outer casing.

[0012] The first sliding spring seat is mounted on the ball screw on the left side of the first bearing seat, and the second sliding spring seat is mounted on the ball screw on the right side of the second bearing seat. The first and second sliding spring seats are slidably connected to the ball screw via balls. One end of the first spring is fixed to the left side of the first sliding spring seat, and the other end is fixed to the right side of the first fixed spring seat. One end of the second spring is fixed to the right side of the second sliding spring seat, and the other end is fixed to the left side of the second fixed spring seat.

[0013] The right side of the No. 2 fixed spring seat is fixed to the middle of the left side of the short side of the No. 2 L-shaped connecting plate, and the left side of the No. 1 fixed spring seat is fixed to the middle of the right side of the short side of the No. 1 L-shaped connecting plate; when the No. 1 spring and the No. 2 spring are not under force, the structure formed by the No. 1 fixed spring seat, the No. 1 spring, and the No. 1 sliding spring seat is symmetrical about the No. 2 gear to the structure formed by the No. 2 sliding spring seat, the No. 2 spring, and the No. 2 fixed spring seat.

[0014] A motor is fixedly mounted on the lower right side of the base plate of the housing via a bracket. The output shaft of the motor is parallel to the ball screw. A third gear is fixedly mounted on the output shaft of the motor. The third gear is located directly below the second gear and the two are meshed together.

[0015] Compared with existing technologies, the beneficial effects of this utility model are as follows: This adjustable constant force loading device can control the magnitude of the constant force by adjusting the deformation of two springs through a ball screw structure. As the core component of the pipe clamping device, the adjustable constant force loading device greatly improves the device's control over the pipe clamping force. The constant force can be adjusted via a motor, reducing the tediousness of manual operation and allowing for more precise force adjustment. This device can automatically adjust the force according to changes in internal and external pipe conditions, maintaining a constant set force, effectively ensuring the safety of pipe connections, improving the safety and lifespan of pipe transportation, and featuring a simple structure, easy disassembly, high safety and reliability, reducing the maintenance frequency of pipe clamping devices, and improving transportation efficiency. Furthermore, the motor, as a remotely controllable electromechanical device, lays the foundation for remote adjustment of the constant force with the assistance of a motor controller. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of one embodiment of an adjustable constant force loading device according to the present invention.

[0017] Figure 2 for Figure 1 A schematic diagram of the right-side structure.

[0018] Figure 3 for Figure 1 A top-view structural diagram.

[0019] Figure 4 This is a schematic diagram of the assembly of gear No. 2 and gear No. 3 in one embodiment of an adjustable constant force loading device of this utility model.

[0020] In the diagram, 1. Force rod number 1, 2. Gear number 2, 3. Housing, 4. Force rod number 2, 5. Gear number 2, 6. Motor, 7. Gear number 3, 8. Fixed spring seat number 1, 9. Spring number 1, 10. Sliding spring seat number 1, 11. Lead screw, 12. Bearing seat number 1, 13. Bearing seat number 2, 14. Sliding spring seat number 2, 15. Spring number 2, 16. Fixed spring seat number 2. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. It should be noted that the directions "front", "rear", "left", "right", "up", and "down" involved in the following description are all based on... Figure 1 The directions shown are for reference only.

[0022] This embodiment provides an adjustable constant force loading device for pipe termination in pipeline transportation. Through mechatronics design, a spring ensures that both ends of the force-bearing rod maintain the same force, while a ball screw device adjusts the force at both ends to achieve an adjustable constant force. By controlling the motor to change the spring length, the force at both ends of the device is kept constant. Under different external conditions, the device for securing the pipe always maintains an ideal force, ensuring stable internal pressure in the pipeline. This eliminates the hassle of frequent manual adjustments, and the automatic control allows for precise control of the required force, significantly improving pipeline lifespan and ensuring safe pipeline transportation.

[0023] Reference Figures 1-4 This utility model provides an adjustable constant force loading device, which includes a first force-bearing rod 1, a first gear 2, a housing 3, a second force-bearing rod 4, a second gear 5, a motor 6, a third gear 7, a first fixed spring seat 8, a first spring 9, a first sliding spring seat 10, a ball screw 11, a first bearing seat 12, a second bearing seat 13, a second sliding spring seat 14, a second spring 15, and a second fixed spring seat 16.

[0024] The outer casing 3 includes a base plate and two strip-shaped frames, which are connected in parallel on the front and rear sides of the upper surface of the base plate. At the same height position in the middle of the opposite inner surfaces of the two strip-shaped frames, a groove of the same size is provided. The groove is set along the left-right direction of the strip-shaped frames and is parallel to them, with the same length.

[0025] The first force-bearing rod 1 consists of a force-bearing plate, two connecting plates, and a first L-shaped connecting plate. The second force-bearing rod 4 consists of a second L-shaped connecting plate and a positioning plate.

[0026] The two connecting plates of the first load-bearing rod 1 are fixedly installed parallel to each other on the upper and lower rear sides of the right side of the load-bearing plate. The end of the long side of the first L-shaped connecting plate is fixedly installed in the middle of the front side of the right side of the load-bearing plate, and the short side of the first L-shaped connecting plate is parallel to and directly opposite the load-bearing plate. The positioning plate of the second load-bearing rod 4 is connected to the end of the short side of its second L-shaped connecting plate, and is parallel to and directly opposite the long side of the second L-shaped connecting plate.

[0027] The first force-bearing rod 1 and the second force-bearing rod 4 are respectively set on the left and right sides of the outer shell 3. The front side of the long side of the first L-shaped connecting plate of the first force-bearing rod 1 is set in the groove of the strip frame on the front side of the outer shell 3, and the first force-bearing rod 1 is slidably connected to the groove.

[0028] The rear side of the long side of the second L-shaped connecting plate of the second force rod 4 is set in the groove of the strip frame on the rear side of the outer shell 3, and the front side of the positioning plate of the second force rod 4 is set in the groove of the strip frame on the front side of the outer shell 3. The second force rod 4 is slidably connected to the two grooves.

[0029] The end of the long side of the second L-shaped connecting plate of the second force-bearing rod 4 is set between the two connecting plates of the first force-bearing rod 1, and the thickness of the long side of the second L-shaped connecting plate is equal to the distance between the two connecting plates of the first force-bearing rod 1. The end of the long side of the second L-shaped connecting plate is slidably connected to the two connecting plates of the first force-bearing rod 1. The short side of the force-bearing plate of the first force-bearing rod 1 and the second L-shaped connecting plate of the second force-bearing rod 4 are parallel and directly opposite each other.

[0030] A gear shaft is fixedly installed on the middle left side of the upper surface of the bottom plate of the outer casing 3 via a bracket. Gear 2 is mounted on this gear shaft and its movement is circumferential rotation on the water surface. A rack structure is provided on the rear side of the left side of the long side of the first L-shaped connecting plate of the first force rod 1, and a rack structure is also provided on the front side of the left side of the long side of the second L-shaped connecting plate. Both rack structures are meshed with gear 2.

[0031] A rectangular through hole running in the front-to-back direction is provided on the right side of the bottom plate of the outer casing 3. The lower end of the No. 2 gear 5, which is fixed in the middle of the ball screw 11, is located in the rectangular through hole. The ball screw 11 is positioned above the rectangular through hole by the No. 1 bearing seat 12 and the No. 2 bearing seat 13, which are respectively fixed on the upper surface of the bottom plate on the left and right sides of the rectangular through hole. The central axis of the No. 2 gear 5 coincides with the central axis of the ball screw 11, and the ball screw 11 is parallel to the strip frame of the outer casing 3.

[0032] The first sliding spring seat 10 is mounted on the ball screw on the left side of the first bearing seat 12, and the second sliding spring seat 14 is mounted on the ball screw on the right side of the second bearing seat 13. The first sliding spring seat 10 and the second sliding spring seat 14 are slidably connected to the ball screw 11 via balls. One end of the first spring 9 is fixed to the left side of the first sliding spring seat 10, and the other end is fixed to the right side of the first fixed spring seat 8; one end of the second spring 15 is fixed to the right side of the second sliding spring seat 14, and the other end is fixed to the left side of the second fixed spring seat 16.

[0033] The right side of the second fixed spring seat 16 is fixed to the middle of the left side of the short side of the second L-shaped connecting plate, and the left side of the first fixed spring seat 8 is fixed to the middle of the right side of the short side of the first L-shaped connecting plate. When the first spring 9 and the second spring 15 are not under force, the structure formed by the first fixed spring seat 8, the first spring 9, and the first sliding spring seat 10 is symmetrical about the second gear 5 with respect to the structure formed by the second sliding spring seat 14, the second spring 15, and the second fixed spring seat 16.

[0034] A motor 6 is fixedly mounted on the lower right side of the base plate of the outer casing 3 (with the side where the ball screw 11 is installed as the top) by a bracket. The output shaft of the motor 6 is parallel to the ball screw 11. A third gear 7 is fixedly mounted on the output shaft of the motor 6. The third gear 7 is located directly below the second gear 5 and the two are meshed together.

[0035] A limit bolt is provided at the left end of the groove of the strip frame on the rear side of the outer shell 3 to limit the movement of the second force rod 4 to the left. The height of the force plate of the first force rod 1 is higher than the height of the long side of the first L-shaped connecting plate to limit the movement of the second force rod 4 to the right, so as to prevent the first force rod 1 and the second force rod 4 from moving excessively and disengaging from the groove of the strip frame.

[0036] The two connecting plates of the first load-bearing rod 1 are the same size, and their length is shorter than the long side of the first L-shaped connecting plate; the short side of the first L-shaped connecting plate is shorter than the short side of the second L-shaped connecting plate; the long side of the first L-shaped connecting plate is shorter than the long side of the second L-shaped connecting plate.

[0037] Working Principle: When using this device, the adjustable constant force loading device is the core component of the pipe closing device. It is responsible for adjusting and controlling the force at both ends of the force-bearing rod to be equal, and transmitting it to the pipe connection through the pipe closing device. The adjustable constant force loading device is fixed to the target position by its shell and mounting bracket. Affected by factors such as internal pipe pressure, material, and temperature, the pipe stress is applied to the fastening device and transmitted to the first force-bearing rod 1 and the second force-bearing rod 4 of the adjustable constant force loading device. The force on the two rods is transmitted to the first spring 9 and the second spring 15 through the movement of the first gear 2. The two springs deform, and the force at both ends of the springs is the same.

[0038] The ball screw structure is the key structure for adjusting the magnitude of constant force. The two ends of the ball screw 11 are symmetrically designed with the second gear 5 as the center. The two sliding spring seats are also the two sliders of the ball screw structure, and the two sliding spring seats perform linear movements in opposite directions. The first force rod 1 and the second force rod 4 perform linear reciprocating movements in opposite directions by meshing with the first gear 2.

[0039] When adjusting the magnitude of the constant force, the motor 6 can be controlled to drive the second gear 5 to rotate, causing the sliding spring seat on the ball screw 11 to be displaced, thereby causing the first spring 9 and the second spring 15 to undergo the same deformation. According to Hooke's Law, the force on the spring will also change accordingly, and then be transmitted to the fastening device through the two force rods and acted on the pipe, thereby changing the magnitude of the constant force.

[0040] Finally, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "fix," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

[0042] Any aspects not covered in this utility model are applicable to the prior art.

Claims

1. An adjustable constant force loading device, characterized in that, The device includes a first force-bearing rod, a first gear, a housing, a second force-bearing rod, a second gear, a motor, a third gear, a first fixed spring seat, a first spring, a first sliding spring seat, a ball screw, a first bearing seat, a second bearing seat, a second sliding spring seat, a second spring, and a second fixed spring seat. The outer shell includes a base plate and two strip-shaped frames. The two strip-shaped frames are connected in parallel on the front and rear sides of the upper surface of the base plate. At the same height position in the middle of the inner side of the two strip-shaped frames, a groove of the same size is opened. The groove is set along the left and right direction of the strip-shaped frames and is parallel to them, and its length is also equal to theirs. The first force-bearing rod consists of a force-bearing plate, two connecting plates, and a first L-shaped connecting plate. The second force-bearing rod consists of a second L-shaped connecting plate and a positioning plate. The two connecting plates of the first force-bearing rod are fixedly installed parallel to each other on the upper and lower rear sides of the right side of the force-bearing plate. The end of the long side of the first L-shaped connecting plate is fixedly installed in the middle of the front side of the right side of the force-bearing plate. The short side of the first L-shaped connecting plate is parallel to and directly opposite the force-bearing plate. The positioning plate of the second force-bearing rod is connected to the end of the short side of its second L-shaped connecting plate and is parallel to and directly opposite the long side of the second L-shaped connecting plate. The No. 1 force-bearing rod and the No. 2 force-bearing rod are respectively set on the left and right sides of the outer shell. The front side of the long side of the No. 1 L-shaped connecting plate of the No. 1 force-bearing rod is set in the groove of the strip frame on the front side of the outer shell, and the No. 1 force-bearing rod is slidably connected to the groove. The rear side of the long side of the second L-shaped connecting plate of the second force rod is set in the groove of the strip frame on the rear side of the shell, and the front side of the positioning plate of the second force rod is set in the groove of the strip frame on the front side of the shell. The second force rod is slidably connected to the two grooves. The end of the long side of the second L-shaped connecting plate of the second force-bearing rod is set between the two connecting plates of the first force-bearing rod, and the thickness of the long side of the second L-shaped connecting plate is equal to the distance between the two connecting plates of the first force-bearing rod. The end of the long side of the second L-shaped connecting plate is slidably connected to the two connecting plates of the first force-bearing rod. The short sides of the force-bearing plate of the first force-bearing rod and the second L-shaped connecting plate of the second force-bearing rod are parallel and directly opposite each other. A gear shaft is fixedly installed on the middle of the left side of the upper surface of the bottom plate of the outer shell by a bracket. The first gear is installed on the gear shaft and its movement is circumferential rotation on the water surface. A rack structure is provided on the rear side of the left side of the long side of the first L-shaped connecting plate of the first force rod, and a rack structure is also provided on the front side of the left side of the long side of the second L-shaped connecting plate. Both rack structures are meshed with the first gear. A rectangular through hole running in the front-to-back direction is provided on the right side of the bottom plate of the outer casing. The lower end of the No. 2 gear, which is fixed in the middle of the ball screw, is located in the rectangular through hole. The ball screw is positioned above the rectangular through hole by the No. 1 bearing seat and the No. 2 bearing seat, which are respectively fixed on the upper surface of the bottom plate on the left and right sides of the rectangular through hole. The central axis of the No. 2 gear coincides with the central axis of the ball screw, and the ball screw is parallel to the strip frame of the outer casing. The first sliding spring seat is mounted on the ball screw on the left side of the first bearing seat, and the second sliding spring seat is mounted on the ball screw on the right side of the second bearing seat. The first and second sliding spring seats are slidably connected to the ball screw via balls. One end of the first spring is fixed to the left side of the first sliding spring seat, and the other end is fixed to the right side of the first fixed spring seat. One end of the second spring is fixed to the right side of the second sliding spring seat, and the other end is fixed to the left side of the second fixed spring seat. The right side of the No. 2 fixed spring seat is fixed to the middle of the left side of the short side of the No. 2 L-shaped connecting plate, and the left side of the No. 1 fixed spring seat is fixed to the middle of the right side of the short side of the No. 1 L-shaped connecting plate; when the No. 1 spring and the No. 2 spring are not under force, the structure formed by the No. 1 fixed spring seat, the No. 1 spring, and the No. 1 sliding spring seat is symmetrical about the No. 2 gear to the structure formed by the No. 2 sliding spring seat, the No. 2 spring, and the No. 2 fixed spring seat. A motor is fixedly mounted on the lower right side of the base plate of the housing via a bracket. The output shaft of the motor is parallel to the ball screw. A third gear is fixedly mounted on the output shaft of the motor. The third gear is located directly below the second gear and the two are meshed together.

2. The adjustable constant force loading device according to claim 1, characterized in that, A limit bolt is provided at the left end of the groove of the strip frame on the rear side of the housing.

3. The adjustable constant force loading device according to claim 1, characterized in that, The height of the load-bearing plate of the No. 1 load-bearing rod is higher than the height of the long side of the No. 1 L-shaped connecting plate.

4. The adjustable constant force loading device according to claim 1, characterized in that, The two connecting plates of the first load-bearing rod are the same size, and their length is shorter than the length of the long side of the first L-shaped connecting plate.

5. The adjustable constant force loading device according to claim 1, characterized in that, The length of the short side of L-shaped connecting plate No. 1 is shorter than the length of the short side of L-shaped connecting plate No.

2.

6. The adjustable constant force loading device according to claim 1, characterized in that, The length of the long side of L-shaped connecting plate No. 1 is shorter than the length of the long side of L-shaped connecting plate No. 2.

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