Vertical constant-force spring hanger

Abstract

The utility model relates to the technical field of spring hangers, in particular to a vertical constant-force spring hanger which comprises a shell and a hanger rod, and the hanger rod is arranged in the shell and penetrates out of the lower portion of the shell in a sliding mode. A fixed plate is fixed in the middle in the shell, two guide rods are fixed between the lower end of the fixed plate and the inner bottom end of the shell, the peripheries of the guide rods are slidably sleeved with a concentric-square-shaped frame, a pressing plate is arranged in the concentric-square-shaped frame, a constant-force spring is connected between the lower end of the pressing plate and the inner bottom end of the concentric-square-shaped frame, a hanging rod slidably penetrates into the concentric-square-shaped frame, and the lower end of the pressing plate is fixed to the upper end of the hanging rod; the constant lifting height of the lifting rod can be conveniently adjusted, the bearing force of the lead screw can be effectively shared through the cooperation of the limiting block and the anti-falling clamping block, the supporting force is more stable, the situation that the spring lifting frame is damaged or fails due to the fact that the lead screw falls off is effectively avoided, and the service life of the spring lifting frame is prolonged. Therefore, constant supporting force can be better provided for constant lifting objects.

Description

Technical Field

[0001] This utility model relates to the field of spring hanger technology, and in particular to a vertical constant force spring hanger. Background Technology

[0002] A constant force spring support is equivalent to a hanger, designed based on the principle of torque balance. Under permissible load displacement, the load torque and spring torque remain balanced. For pipes and equipment supported by constant force springs, a constant supporting force can be provided when displacement occurs, thus preventing additional stress on the pipes and equipment. Constant force springs are generally used in places where displacement stress needs to be reduced, such as the main body of power plant boilers, the suspended parts of steam, water, flue gas, and air ducts and burners in power plants, as well as in places requiring this type of support in the petroleum and chemical industries.

[0003] In existing technologies, the constant lifting height of the boom is generally fixed and difficult to adjust conveniently, making it difficult to consistently lift items of various heights. Although some constant force spring hangers can adjust the boom height, they often use the rotation of a lead screw to adjust the boom's length. After adjusting the boom's length via the lead screw, since the boom needs to constantly lift heavy objects, the support point of the boom is only limited by the lead screw. This makes the support point of the boom relatively weak, making it easy for the lead screw to deflect. Once the lead screw deflects, the spring hanger will be damaged and fail, seriously affecting its service life. Utility Model Content

[0004] This utility model provides a vertical constant force spring hanger, which facilitates convenient adjustment of the hanging rod's height and provides a more effective and stable constant supporting force for suspended items.

[0005] To address the existing technical problems, this utility model discloses a vertical constant force spring hanger, including a housing and a hanging rod, wherein the hanging rod is disposed inside the housing and slides through the bottom of the housing;

[0006] A fixing plate is fixed in the middle of the housing. Two guide rods are fixed between the lower end of the fixing plate and the bottom end of the housing. A return frame is slidably sleeved around the guide rods. A pressure plate is provided inside the return frame. A constant force spring is connected between the lower end of the pressure plate and the bottom end of the return frame. The lifting rod slides through the return frame. The lower end of the pressure plate is fixed to the upper end of the lifting rod. The constant force spring is sleeved around the lifting rod.

[0007] Two adjusting rods are fixed at the upper end of the frame and are arranged in a left-right manner. Two openings are opened on the fixed plate and are arranged in a left-right manner. The adjusting rods extend to the top of the fixed plate through the adjacent openings. An adjusting plate is fixed between the upper ends of the two adjusting rods. A height adjustment drive assembly is provided above the adjusting plate. An anti-detachment limit assembly is provided on one side of each adjusting rod.

[0008] Furthermore, the lower ends of the housing are both fixed with support legs.

[0009] Furthermore, the height adjustment drive assembly includes a forward and reverse motor, a main gear, a lead screw, and a secondary gear. The forward and reverse motor is fixed to the top of the housing, and the main gear is connected to the power end of the forward and reverse motor.

[0010] Furthermore, the lead screw is rotatably connected between the upper end of the fixed plate and the upper end of the housing, the auxiliary gear is fixedly sleeved around the lead screw, the adjusting plate is threadedly sleeved with the lead screw, and the auxiliary gear meshes with the main gear.

[0011] Furthermore, each of the anti-detachment limiting components includes a return spring, a limiting block, an electromagnet, a spring return rod, a movable block, a magnetic block, and an anti-detachment locking block. A groove is opened on one side of each of the openings, and each of the return springs is connected to the groove. Each of the limiting blocks is connected to the end of the return spring. A number of limiting grooves matching the limiting blocks are opened on one side of each of the adjusting rods. The upper and lower surfaces of the end of each limiting block are inclined.

[0012] Furthermore, each of the limiting blocks has a contraction groove on one side, each of the spring return rods has two, and the spring return rods and electromagnets are connected to the inner sidewall of the contraction groove. Each of the movable blocks is connected to the end of the spring return rod, and each of the magnetic blocks is connected to one side of the movable block, and each of the magnetic blocks corresponds to the adjacent electromagnets on the left and right.

[0013] Furthermore, each of the anti-detachment blocks is connected to the other side of the movable block, and each of the limiting grooves has an anti-detachment slot that matches the anti-detachment block.

[0014] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0015] 1. By setting up a height adjustment drive component, it is convenient to drive the lead screw to rotate, which in turn can easily drive the adjustment plate, adjustment rod, return frame and suspension rod to move up and down, thus facilitating the adjustment of the constant suspension height of the suspension rod;

[0016] 2. By inserting the limiting block into the limiting groove and the anti-detachment block into the anti-detachment groove, compared with the weak support of a single lead screw in the prior art, the cooperation of the limiting block and the anti-detachment block is conducive to effectively sharing the load-bearing force of the lead screw, making the support force more stable, and thus effectively avoiding the damage to the spring hanger caused by the lead screw derailment, thereby providing a better constant support force for the suspended items. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall internal structure of this utility model;

[0019] Figure 3 This is a partially enlarged structural diagram of part A of the present invention.

[0020] Figure 1-3 In the middle: 1. Housing; 2. Support leg; 3. Hanging rod; 4. Guide rod; 5. Return frame; 6. Pressure plate; 7. Constant force spring; 8. Fixing plate; 9. Adjusting rod; 10. Adjusting plate; 11. Lead screw; 12. Forward and reverse motor; 13. Main gear; 14. Secondary gear; 15. Groove; 16. Return spring; 17. Limiting block; 18. Shrinkage groove; 19. Electromagnet; 20. Spring return rod; 21. Movable block; 22. Magnetic block; 23. Limiting groove; 24. Anti-detachment groove; 25. Anti-detachment block; 26. Through port. Detailed Implementation

[0021] A vertical constant force spring hanger:

[0022] like Figure 1-3 As shown, this embodiment includes a housing 1 and a lifting rod 3. The lifting rod 3 is disposed inside the housing 1 and slides through the bottom of the housing 1. A fixing plate 8 is fixed in the middle of the housing 1. Two guide rods 4 are fixed between the lower end of the fixing plate 8 and the bottom of the housing 1. A molded frame 5 is slidably sleeved around the guide rods 4. A pressure plate 6 is provided inside the molded frame 5. A constant force spring 7 is connected between the lower end of the pressure plate 6 and the bottom of the molded frame 5. The lifting rod 3 slides through the molded frame 5. The lower end of the pressure plate 6 is fixed to the upper end of the lifting rod 3. The constant force spring 7 is sleeved around the lifting rod 3. Two adjusting rods 9 are fixed at the upper end of the molded frame 5, arranged left and right. Two openings 26 are opened on the fixing plate 8, arranged left and right. The adjusting rods 9 extend to the top of the fixing plate 8 through adjacent openings. An adjusting plate 10 is fixed between the upper ends of the two adjusting rods 9. A height adjustment drive assembly is provided above the adjustment plate 10. The height adjustment drive assembly includes a forward and reverse motor 12, a main gear 13, a lead screw 11, and a secondary gear 14. The forward and reverse motor 12 is fixed to the top of the housing 1. The main gear 13 is connected to the power end of the forward and reverse motor 12. The lead screw 11 is rotatably connected between the upper end of the fixed plate 8 and the top of the housing 1. The secondary gear 14 is fixedly sleeved around the lead screw 11. The adjustment plate 10 is threadedly sleeved with the lead screw 11. The secondary gear 14 meshes with the main gear 13. An anti-detachment limiting assembly is provided on one side of the adjustment rod 9. The anti-detachment limiting assembly includes a return spring 16, a limiting block 17, an electromagnet 19, a spring return rod 20, a movable block 21, a magnetic block 22, and an anti-detachment locking block 25. Support feet 2 are fixed on both sides of the lower end of the housing 1. A shrinkage groove 18 is opened on one side of the limiting block 17.

[0023] When it is necessary to adjust the constant lifting height of the boom 3, the support leg 2 is used to support the constant force spring hanger, and the anti-detachment block 25 is locked in the anti-detachment slot 24. The electromagnet 19 is energized and magnetically attracts the magnetic block 22. The magnetic block 22 will compress the spring return rod 20, and the magnetic block 22 will drive the movable block 21 and the anti-detachment block 25 to move together into the shrinkage groove 18 until the anti-detachment block 25 moves out of the anti-detachment slot 24. Then, the operation of the forward and reverse motor 12 drives the lead screw 11 to rotate forward or reverse. Therefore, the rotation of the lead screw 11 facilitates the upward or downward movement of the adjusting plate 10, adjusting rod 9, return frame 5 and boom 3. In this process, the return frame 5 will slide up and down along the guide rod 4, which helps to ensure the stability of the boom 3 when it moves up and down. Therefore, it is convenient to adjust the constant lifting height of the boom 3.

[0024] like Figure 2 , 3 As shown, in this embodiment, a groove 15 is opened on one side of the opening 26, the return springs 16 are all connected in the groove 15, the limiting blocks 17 are all connected to the end of the return springs 16, and a number of limiting grooves 23 matching the limiting blocks 17 are opened on one side of the adjusting rod 9. The upper and lower surfaces of the end of the limiting blocks 17 are inclined.

[0025] As the adjusting rod 9 moves up and down, the limiting block 17 is inserted into the limiting groove 23, and the upper and lower surfaces of the limiting block 17 are inclined. Therefore, the groove opening of the limiting groove 23 will push the limiting block 17 outward along the inclined surface of the limiting block 17. The limiting block 17 will then compress the return spring 16, causing the limiting block 17 to move into the groove 15. The limiting block 17 will then move out of the limiting groove 23. After the height of the adjusting rod 9 and the hanging rod 3 is adjusted, the limiting block 17 will be aligned with the corresponding limiting groove 23. At this time, the rebound force of the return spring 16 will cause the limiting block 17 to be inserted into the corresponding limiting groove 23. This is beneficial for the limiting block 17 to share the load of the lead screw 11, thereby preventing the lead screw 11 from derailing.

[0026] like Figure 2 , 3 As shown, in this embodiment, each spring return rod 20 is provided in pairs, and the spring return rod 20 and the electromagnet 19 are connected to the inner side wall of the contraction groove 18. Each movable block 21 is connected to the end of the spring return rod 20. Each magnetic block 22 is connected to one side of the movable block 21, and each magnetic block 22 corresponds to the adjacent electromagnet 19 on the left and right. Each anti-detachment block 25 is connected to the other side of the movable block 21. Each limiting groove 23 has an anti-detachment groove 24 that matches the anti-detachment block 25.

[0027] When the limiting block 17 is engaged in the corresponding limiting groove 23, the electromagnet 19 is de-energized. The electromagnet 19 no longer attracts the magnetic block 22. Therefore, the rebound force of the spring return rod 20 will drive the movable block 21 and the anti-detachment block 25 to reset. The anti-detachment block 25 will then engage in the corresponding anti-detachment groove 24. In summary, by engaging the limiting block 17 in the limiting groove 23 and engaging the anti-detachment block 25 in the anti-detachment groove 24, compared with the weak support force of a single lead screw 11 in the prior art, the cooperation of the limiting block 17 and the anti-detachment block 25 is conducive to effectively sharing the load-bearing force of the lead screw 11, making the support force more stable. This effectively avoids the damage to the spring hanger caused by the lead screw 11 detaching, thus providing a better constant support force for the suspended items.

Claims

1. A vertical constant force spring hanger, comprising a housing (1) and a hanger rod (3), the hanger rod (3) is arranged in the housing (1) and slides through the lower surface of the housing (1), characterized in that: a fixed plate (8) is fixed in the middle of the housing (1), two guide rods (4) are fixed between the lower end of the fixed plate (8) and the inner bottom end of the housing (1), a back-shaped frame (5) is slidably sleeved on the outer periphery of the guide rod (4), a pressing plate (6) is arranged in the back-shaped frame (5), a constant force spring (7) is connected between the lower end of the pressing plate (6) and the inner bottom end of the back-shaped frame (5), the hanger rod (3) slides through the back-shaped frame (5), the lower end of the pressing plate (6) is fixed to the upper end of the hanger rod (3), and the constant force spring (7) is sleeved on the outer periphery of the hanger rod (3). The upper end of the back-shaped frame (5) is fixed with two adjusting rods (9) distributed left and right, two through openings (26) are formed in the fixed plate (8) and distributed left and right, the adjusting rods (9) extend above the fixed plate (8) through the adjacent through openings, the upper ends of the two adjusting rods (9) are fixed with an adjusting plate (10), a height adjusting drive assembly is arranged above the adjusting plate (10), and a anti-falling limiting assembly is arranged on one side of the adjusting rod (9). The lower end of the housing (1) is fixed with a supporting leg (2) on each side.

2. A vertical constant force spring hanger according to claim 1, characterized in that: The height adjusting drive assembly comprises a reversible motor (12), a main gear (13), a lead screw (11) and a secondary gear (14), the reversible motor (12) is fixed to the inner top end of the housing (1), and the main gear (13) is connected to the power end of the reversible motor (12).

3. A vertical constant force spring hanger according to claim 1, wherein: The lead screw (11) is rotatably connected between the upper end of the fixed plate (8) and the inner top end of the housing (1), the secondary gear (14) is fixedly sleeved on the outer periphery of the lead screw (11), the adjusting plate (10) is threadedly sleeved with the lead screw (11), and the secondary gear (14) is engaged with the main gear (13).

4. A vertical constant force spring hanger according to claim 3, wherein: Each anti-falling limiting assembly comprises a back spring (16), a limiting block (17), an electromagnet (19), a spring back rod (20), a movable block (21), a magnetic block (22) and an anti-falling clamping block (25), a groove (15) is formed on one side of the through opening (26), the back spring (16) is connected to the inner side wall of the groove (15), the limiting block (17) is connected to the end of the back spring (16), a limiting groove (23) matched with the limiting block (17) is formed on one side of the adjusting rod (9), and the upper and lower surfaces of the end of the limiting block (17) are inclined.

5. A vertical constant force spring hanger according to claim 1, wherein: A contraction groove (18) is formed on one side of the limiting block (17), two spring back rods (20) are arranged, the spring back rod (20) and the electromagnet (19) are connected to the inner side wall of the contraction groove (18), the movable block (21) is connected to the end of the spring back rod (20), the magnetic block (22) is connected to one side of the movable block (21), and the magnetic block (22) is left-right corresponding to the adjacent electromagnet (19).

6. A vertical constant force spring hanger according to claim 5, wherein: ​ 7. A vertical constant force spring hanger according to claim 5, wherein: The anti-off blocks (25) are connected to the other side of the movable block (21), and the anti-off slots (24) matched with the anti-off blocks (25) are formed in the limiting slots (23).

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