Constant-force spring hanger
By adding a pulley set composed of a main pulley and a guide wheel in the constant force spring hanger, the problem of not being able to support a large displacement in the prior art is solved, and the support effect of a large vertical displacement of the pipeline under a constant tension is achieved.
Patent Information
- Application Number
- CN202422181054.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-06
AI Technical Summary
The existing constant force spring support hangers cannot be effectively supported under large displacement of the pipeline, resulting in the inability to select a suitable support hanger and cannot meet the needs of large displacement.
A pulley set composed of the main pulley and the guide wheel is added so that the vertical displacement of the pipe suspended by the constant force spring hanger is several times the displacement of the load frame, and a large vertical displacement is achieved by setting the pulley set.
The support of the pipeline with a large vertical displacement under constant tension conditions is achieved, the applicability of the constant spring hanger is enhanced, and the demand for a larger displacement is met.
Smart Images
Figure CN223076445U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of spring hangers, and particularly relates to a constant force spring hanger. Background Art
[0002] There are a large number of high-temperature pipelines in industries such as petrochemical, chemical, and power generation. During the operation of the pipelines, due to thermal expansion, large displacements are generated, and constant force spring supports and hangers need to be selected to support the pipelines to avoid damage to the pipeline system.
[0003] The existing constant force spring supports and hangers mainly include moment balance type and main and auxiliary spring type. When the pipeline weight is small, the maximum stroke of the moment balance type spring support and hanger is usually 300 - 400 mm, and the maximum stroke of the main and auxiliary spring type support and hanger is usually 400 - 500 mm. For pipelines with larger displacements, a suitable constant force spring support and hanger cannot be selected. Content of the Utility Model
[0004] In order to solve the problems existing in the above-mentioned prior art, the utility model provides a constant force spring hanger. By adding a pulley group composed of a main pulley and a guide pulley, the vertical displacement of the pipeline suspended by the constant force spring hanger is several times that of the displacement of the load frame, so that the pipeline can achieve a large vertical displacement under the condition of a constant pulling force.
[0005] The specific technical solution adopted by the utility model is as follows:
[0006] A constant force spring hanger includes a frame body, a main spring, a compensation spring, a knife-shaped guide rail, and a load frame located on the frame body. The telescopic end of the main spring abuts against the bottom surface of the load frame and hinders the load frame from moving downward. The knife-shaped guide rails are symmetrically arranged on both sides of the main spring. The knife-shaped guide rails are connected to the frame body horizontally by means of the compensation spring. The two sides of the load frame form a sliding fit with the knife-shaped guide rails by means of limit wheels. A main pulley, a guide pulley, and a transmission rope are further arranged on the frame body. The main pulley is located above the load frame and is rotatably connected to a pulley seat. The pulley seat is fixedly connected to the load frame. The guide pulley is located below the main spring and is rotatably connected to a pulley frame. The pulley frame is fixedly connected to the frame body. The fixed end of the transmission rope is fixedly connected to the pulley frame. The free end of the transmission rope passes through the main pulley and the guide pulley and is connected to the pipeline. The pipeline is suspended by means of the free end of the transmission rope.
[0007] An adjusting mechanism is further arranged on the frame body. The adjusting mechanism includes a load adjusting bolt and a load adjusting pressure plate. The main spring is located between the load frame and the load adjusting pressure plate. The load adjusting bolt is threadedly connected to the frame body. The load adjusting pressure plate bears the main spring and is suspendedly connected to the frame body by means of the load adjusting bolt. The working load of the main spring is adjusted by rotating the load adjusting bolt.
[0008] A limiting mechanism is also provided between the load adjustment pressure plate and the load frame. The limiting mechanism includes a spring guide cylinder, which is fixedly connected to the top of the load adjustment pressure plate. The main spring is sleeved inside the spring guide cylinder and has the freedom to expand and contract along the axis of the spring guide cylinder.
[0009] The limiting mechanism further includes a load rod and a load guide cylinder. The load rod is fixedly connected to the bottom of the load frame. The load guide cylinder is sleeved inside the main spring and fixedly connected to the top of the load adjustment pressure plate. The load rod is sleeved inside the load guide cylinder and has the freedom to move along the axis of the load guide cylinder.
[0010] The main pulley includes a first main pulley and a second main pulley arranged vertically up and down. The guide pulley includes a first guide pulley, a second guide pulley, and a third guide pulley. The first main pulley, the second main pulley, the first guide pulley, the second guide pulley, and the third guide pulley are arranged in sequence from top to bottom. The free end of the transmission rope passes through the second main pulley, the first guide pulley, the first main pulley, the second guide pulley, and the third guide pulley in sequence and vertically downward along the center of the hanger.
[0011] The diameter of the first main pulley is larger than that of the lower second main pulley, and the diameter of the first guide pulley is the same as that of the second main pulley.
[0012] The main pulley group includes a third main pulley and a fourth main pulley arranged coaxially and horizontally left and right. The guide pulley group includes a fourth guide pulley, a fifth guide pulley, and a sixth guide pulley. The fifth guide pulley and the sixth guide pulley are arranged parallel to the third main pulley. The vertical plane where the fourth guide pulley is located is perpendicular to the vertical plane where the third main pulley is located. The free end of the transmission rope passes through the third main pulley, the fourth guide pulley, the fourth main pulley, the fifth guide pulley, and the sixth guide pulley in sequence and vertically downward.
[0013] The beneficial effects of the present utility model are:
[0014] The present utility model is additionally provided with a pulley group composed of a main pulley and a guide pulley. By setting the pulley group, the vertical displacement of the pipeline suspended by the constant force spring hanger is several times that of the displacement of the load frame. Accordingly, a larger vertical displacement can be achieved for the pipeline under the condition of a constant tensile force. Description of the Drawings
[0015] Figure 1 It is a schematic structural diagram of Specific Embodiment 1;
[0016] Figure 2 It is Figure 1 The cross-sectional structural diagram in the A-A direction in
[0017] Figure 3 It is a schematic structural diagram of Specific Embodiment 2;
[0018] Figure 4 is Figure 3 the schematic cross-sectional structure diagram in the B-B direction in
[0019] Figure 5 the schematic structure diagram of Specific Embodiment 3;
[0020] Figure 6 is Figure 5 the schematic cross-sectional structure diagram in the C-C direction in
[0021] Figure 7 the schematic structure diagram of Specific Embodiment 4;
[0022] Figure 8 is Figure 7 the schematic cross-sectional structure diagram in the D-D direction in
[0023] Figure 9 the schematic structure diagram of the spring pin;
[0024] In the attached drawings, 1. frame body, 2. main spring, 3. compensation spring, 4. knife-shaped guide rail, 5. load frame, 6. main pulley, 7. guide pulley, 8. transmission rope, 9. pulley seat, 10. pulley frame, 11. load adjustment bolt, 12. load adjustment pressing plate, 13. spring guide cylinder, 14. load rod, 15. load guide cylinder, 16. limit pulley, 601. first main pulley, 602. second main pulley, 701. first guide pulley, 702. second guide pulley, 703. third guide pulley, 603. third main pulley, 604. fourth main pulley, 704. fourth guide pulley, 705. fifth guide pulley, 706. sixth guide pulley. Specific Embodiments
[0025] The present utility model will be further described below in conjunction with the attached drawings and specific embodiments:
[0026] Specific Embodiment 1, as shown in Figure 1-2 and Figure 9As shown in the figure, this specific embodiment provides a constant force spring hanger, which includes a frame body 1, a main spring 2, a compensating spring 3, a knife-shaped guide rail 4 and a load frame 5 located on the frame body 1. The telescopic end of the main spring 2 abuts against the bottom surface of the load frame 5 and hinders the downward movement of the load frame 5. The knife-shaped guide rails 4 are symmetrically arranged on both sides of the main spring 2. The knife-shaped guide rails 4 are connected to the frame body 1 horizontally by means of the compensating spring 3. Both sides of the load frame 5 form a sliding fit with the knife-shaped guide rails 4 by means of limit wheels 16. A main pulley 6, a guide pulley 7 and a transmission rope 8 are further arranged on the frame body 1. The main pulley 6 is located above the load frame 5 and is rotatably connected to a pulley seat 9. The pulley seat 9 is fixedly connected to the load frame 5. The guide pulley 7 is located below the main spring 2 and is rotatably connected to a pulley frame 10. The pulley frame 10 is fixedly connected to the frame body 1. The fixed end of the transmission rope 8 is fixedly connected to the pulley frame 10. The free end of the transmission rope 8 passes through the main pulley 6 and the guide pulley 7 and is connected to a pipeline. The pipeline is suspended by means of the free end of the transmission rope 8.
[0027] Existing constant force spring supports and hangers mainly include moment balance type and main and auxiliary spring type. When the pipeline weight is small, the maximum stroke of the moment balance type spring support and hanger is usually 300 - 400 mm, and that of the main and auxiliary spring type support and hanger is usually 400 - 500 mm. For pipelines with larger displacements, a suitable constant force spring support and hanger cannot be selected.
[0028] Therefore, this utility model is additionally provided with a pulley group composed of a main pulley 6 and a guide pulley 7. By setting the pulley group, the vertical displacement of the pipeline suspended by the constant force spring hanger is twice the displacement of the load frame 5. Accordingly, a larger vertical displacement can be achieved for the pipeline under the condition of a constant pulling force.
[0029] Neglecting the weights and frictions of components such as the main pulley 6, the load frame 5, and the transmission rope 8, the pipeline weight is half of the spring support force received by the load frame 5. For example, if the pipeline weight is 300 N and the vertical upward displacement is 500 mm, neither the current moment balance type spring support and hanger nor the main and auxiliary spring type support and hanger can meet the requirements. However, the constant force spring hanger designed in this specific embodiment can achieve a 500 - mm upward displacement of the pipeline by a 250 - mm upward displacement of the load frame 5, and the main spring 2 and the compensating spring 3 jointly provide a 600 - N vertical upward force.
[0030] In addition, mounting holes are also provided on the load frame in this specific embodiment. A guide shaft is installed by using the mounting holes. Both ends of the guide shaft extend out of the shell of the frame body. Teflon pads are provided on the guide shaft between the load frame and the shell. Serrated spring pins 17 are installed at both ends of the guide shaft when the constant force spring hanger leaves the factory. The spring pins are stuck between the serrated blocks of the shell of the constant force spring hanger. The spring pins 17 keep the load frame fixed during the transportation and installation of the constant force spring hanger. The spring pins 17 are removed before the temperature of the pipeline rises.
[0031] The frame 1 is also provided with an adjustment mechanism, which includes a load adjustment bolt 11 and a load adjustment plate 12. The main spring 2 is located between the load frame 5 and the load adjustment plate 12. The load adjustment bolt 11 is threadedly connected to the frame 1. The load adjustment plate 12 carries the main spring 2 and forms a suspension connection with the frame 1 with the help of the load adjustment bolt 11. The main spring 2 adjusts the working load by rotating the load adjustment bolt 11. By rotating the load adjustment bolt 11, the distance between the load frame 5 and the load adjustment plate 12 can be adjusted, thereby controlling the expansion and contraction amount of the main spring 2 to change the working load of the constant force spring hanger.
[0032] A limiting mechanism is also arranged between the load adjustment plate 12 and the load frame 5, and the limiting mechanism includes a spring guide cylinder 13, and the spring guide cylinder 13 is fixedly connected to the top of the load adjustment plate 12. The main spring 2 is sleeved inside the spring guide cylinder 13 and has the freedom to expand and contract along the axis direction of the spring guide cylinder 13. Through the spring guide cylinder 13, the main spring 2 can be guaranteed to expand and contract in the vertical direction, thereby avoiding deviation and shaking of the main spring 2 during the expansion and contraction process. Specific embodiment 2
[0034] The difference between the specific embodiment 2 and the specific embodiment 1 is that the mechanism in the specific embodiment 2 further includes a load rod 14 and a load guide cylinder 15. Figure 3-4 As shown, the load rod 14 is fixedly connected to the bottom of the load frame 5, the load guide cylinder 15 is sleeved inside the main spring 2 and fixedly connected to the top of the load adjustment plate 12, the load rod 14 is sleeved inside the load guide cylinder 15 and has the freedom to move along the axial direction of the load guide cylinder 15, the load guide cylinder 15 and the spring guide cylinder 13 are concentrically arranged, when the load frame 5 is displaced upward to the uppermost end, the lower end of the load rod 14 is lower than the upper end of the load guide cylinder 15; when the load frame 5 is displaced downward to the lowermost end, the lower end of the load rod 14 is higher than the lower end of the load guide cylinder 15, through the telescopic cooperation of the load rod 14 and the load guide cylinder 15, it can be ensured that the load frame 5 will not be offset during the lifting process. Specific embodiment 3
[0036] The only difference between the specific embodiment 3 and the specific embodiment 2 is that the main pulley 6 in the specific embodiment 3 is provided with two groups, such as Figure 5-6As shown, the main pulley 6 includes a first main pulley 601 and a second main pulley 602 arranged vertically up and down. The guide pulley 7 includes a first guide pulley 701, a second guide pulley 702, and a third guide pulley 703. The first main pulley 601, the second main pulley 602, the first guide pulley 701, the second guide pulley 702, and the third guide pulley 703 are arranged in sequence from top to bottom. The free end of the transmission rope 8 sequentially passes through the second main pulley 602, the first guide pulley 701, the first main pulley 601, the second guide pulley 702, and the third guide pulley 703 and vertically downward along the center of the hanger.
[0037] In this specific embodiment, the number of main pulleys 6 is increased, further increasing the maximum displacement of the constant force spring hanger. Through the first main pulley 601 and the second main pulley 602, the vertical displacement of the pipeline suspended by the constant force spring hanger is four times the displacement of the load frame 5, enabling the pipeline to achieve a greater vertical displacement under constant tensile force conditions. Ignoring the weights and frictions of components such as the main pulley 6, the load frame 5, and the transmission rope 8, the weight of the pipeline is one-fourth of the spring support force received by the load frame 5.
[0038] The diameter of the first main pulley 601 is larger than that of the lower second main pulley 602, and the diameter of the first guide pulley 701 is the same as that of the second main pulley 602. By defining the sizes of the first main pulley 601, the second main pulley 602, and the first guide pulley 701, friction between the transmission rope 8 on the second main pulley 602 and other parts of the transmission rope 8 can be avoided, increasing the lifespan of the constant force spring hanger. Specific Embodiment 4
[0040] The difference between Specific Embodiment 4 and Specific Embodiment 3 is only that the arrangement methods of the two groups of main pulleys 6 are different. As Figure 7-8 shown, the main pulley 6 group includes a third main pulley 603 and a fourth main pulley 604 arranged coaxially and horizontally left and right. The guide pulley 7 group includes a fourth guide pulley 704, a fifth guide pulley 705, and a sixth guide pulley 706. The fifth guide pulley 705 and the sixth guide pulley 706 are arranged parallel to the third main pulley 603. The vertical plane where the fourth guide pulley 704 is located is perpendicular to the vertical plane where the third main pulley 603 is located. The free end of the transmission rope 8 sequentially passes through the third main pulley 603, the fourth guide pulley 704, the fourth main pulley 604, the fifth guide pulley 705, and the sixth guide pulley 706 and vertically downward.
[0041] The third main pulley 603 and the fourth main pulley 604 in Specific Embodiment 4 have the same effect as the first main pulley 601 and the second main pulley 602 in Specific Embodiment 3, both making the vertical displacement of the pipeline suspended by the constant force spring hanger four times the displacement of the load frame 5, enabling the pipeline to achieve a greater vertical displacement under constant tensile force conditions.
Claims
1. A constant force spring hanger, comprising a frame body (1), a main spring (2), a compensation spring (3), a knife-shaped guide rail (4) and a load frame (5) located on the frame body (1). The telescopic end of the main spring (2) abuts against the bottom surface of the load frame (5) and hinders the downward movement of the load frame (5). The knife-shaped guide rails (4) are symmetrically arranged on both sides of the main spring (2). The knife-shaped guide rails (4) are connected to the frame body (1) in the horizontal direction by means of the compensation spring (3). Both sides of the load frame (5) form a sliding fit with the knife-shaped guide rails (4) by means of limit wheels (16). It is characterized in that, A main pulley (6), a guide pulley (7) and a transmission rope (8) are further arranged on the frame body (1). The main pulley (6) is located above the load frame (5) and is rotatably connected to a pulley seat (9). The pulley seat (9) is fixedly connected to the load frame (5). The guide pulley (7) is located below the main spring (2) and is rotatably connected to a pulley frame (10). The pulley frame (10) is fixedly connected to the frame body (1). The fixed end of the transmission rope (8) is fixedly connected to the pulley frame (10). The free end of the transmission rope (8) passes through the main pulley (6) and the guide pulley (7) and is connected to a pipeline. The pipeline is suspended by means of the free end of the transmission rope (8).
2. The constant force spring hanger according to claim 1, characterized in that An adjusting mechanism is further arranged on the frame body (1). The adjusting mechanism includes a load adjusting bolt (11) and a load adjusting pressure plate (12). The main spring (2) is located between the load frame (5) and the load adjusting pressure plate (12). The load adjusting bolt (11) is in threaded connection with the frame body (1). The load adjusting pressure plate (12) bears the main spring (2) and forms a suspended connection with the frame body (1) by means of the load adjusting bolt (11). The working load of the main spring (2) is adjusted by rotating the load adjusting bolt (11).
3. The constant force spring hanger according to claim 2, characterized in that, A limiting mechanism is further arranged between the load adjusting pressure plate (12) and the load frame (5). The limiting mechanism includes a spring guide cylinder (13). The spring guide cylinder (13) is fixedly connected to the top of the load adjusting pressure plate (12). The main spring (2) is sleeved inside the spring guide cylinder (13) and has the freedom to expand and contract along the axis direction of the spring guide cylinder (13).
4. The constant force spring hanger according to claim 3, characterized in that, The limiting mechanism further includes a load rod (14) and a load guide cylinder (15). The load rod (14) is fixedly connected to the bottom of the load frame (5). The load guide cylinder (15) is sleeved inside the main spring (2) and is fixedly connected to the top of the load adjusting pressure plate (12). The load rod (14) is sleeved inside the load guide cylinder (15) and has the freedom to move along the axis direction of the load guide cylinder (15).
5. A constant force spring hanger according to claim 1, characterized in that, The main pulley (6) includes a first main pulley (601) and a second main pulley (602) arranged vertically up and down. The guide pulley (7) includes a first guide pulley (701), a second guide pulley (702) and a third guide pulley (703). The first main pulley (601), the second main pulley (602), the first guide pulley (701), the second guide pulley (702) and the third guide pulley (703) are arranged in sequence from top to bottom. The free end of the transmission rope (8) passes through the second main pulley (602), the first guide pulley (701), the first main pulley (601), the second guide pulley (702) and the third guide pulley (703) in sequence and is vertically downward along the center of the hanger.
6. The constant force spring hanger according to claim 5, characterized in that, The diameter of the first main pulley (601) is larger than that of the second main pulley (602) below it. The diameter of the first guide pulley (701) is the same as that of the second main pulley (602).
7. A constant force spring hanger according to claim 1, characterized in that, The main pulley (6) group includes a third main pulley (603) and a fourth main pulley (604) which are coaxially arranged and horizontally disposed left and right. The guide pulley (7) group includes a fourth guide pulley (704), a fifth guide pulley (705) and a sixth guide pulley (706). The fifth guide pulley (705) and the sixth guide pulley (706) are arranged in parallel with the third main pulley (603). The vertical plane where the fourth guide pulley (704) is located is perpendicular to the vertical plane where the third main pulley (603) is located. The free end of the transmission rope (8) sequentially passes through the third main pulley (603), the fourth guide pulley (704), the fourth main pulley (604), the fifth guide pulley (705) and the sixth guide pulley (706) and extends vertically downward.