A self-resetting pipe thermal displacement compensator

Abstract

The utility model relates to bellows compensator technical field discloses a pipeline thermal displacement compensator of automatic reset can, and both sides of bellows are provided with reset mechanism, and reset mechanism includes spacing frame, first mounting plate and expansion plate, and the bottom of spacing frame is firmly connected with first mounting plate, and the inside installation of spacing frame has expansion plate, and the top of expansion plate is firmly connected with second mounting plate, and the top of first mounting plate is firmly connected with two hollow tubes. Reset mechanism can support between first flange plate and second flange plate, prevent the appearance angular displacement of this compensator in the use process, and the expansion of guide rod in hollow tube plays the primary support effect, and the expansion of expansion plate in spacing frame plays the secondary support effect, and through double -deck support effect can obviously promote the support effect between first flange plate and second flange plate, avoids the deformation and the damage phenomenon that ear seat is influenced by shearing force for a long time.

Description

Technical Field

[0001] This utility model relates to the technical field of bellows compensators, specifically to a pipeline thermal displacement compensator that can automatically reset. Background Technology

[0002] In pipeline systems, thermal expansion and contraction caused by temperature changes can lead to thermal displacement of the pipeline. If this displacement cannot be effectively compensated, it will cause stress concentration, loosening or even rupture of the pipeline, seriously affecting the safe operation of the pipeline. Traditional thermal displacement compensators usually adopt a bellows structure, which absorbs the thermal displacement of the pipeline through the elastic deformation of the bellows. However, when the fluid flows through the bellows compensator, the bellows compensator is prone to a certain angular displacement, so the screw and lug will be subjected to a large shear force. Since the lug is a simple plate structure, it is prone to deformation and damage after being subjected to shear force for a long time, thus affecting the normal use of the bellows compensator. Utility Model Content

[0003] The purpose of this invention is to provide an automatically resettable pipeline thermal displacement compensator to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an automatically resetting pipeline thermal displacement compensator, comprising a bellows, a first flange fixedly connected to the top of the bellows, and a second flange fixedly connected to the bottom of the bellows. Multiple first lugs are circumferentially welded to the periphery of the first flange, and multiple second lugs are circumferentially welded to the periphery of the second flange. A screw is threaded between the first lugs and the second lugs. Resetting mechanisms are provided on both the front and rear sides of the bellows. Each resetting mechanism includes a limiting frame, a first mounting plate, and a telescopic plate. The bottom end of the limiting frame is fixedly connected to the first mounting plate, and a telescopic plate is installed inside the limiting frame. A second mounting plate is fixedly connected to the top of the telescopic plate. Two hollow tubes are fixedly connected to the top of the first mounting plate, and guide rods are inserted into the top of the hollow tubes. Resetting springs are sleeved on the outside of the hollow tubes and guide rods. Limit blocks are fixedly connected to both sides of the telescopic plate. Scale lines are provided on the front surface of the telescopic plate and the front surface of the limiting frame.

[0005] As a preferred technical solution of this utility model, the inner wall of the limiting frame is longitudinally provided with limiting grooves on both sides, the limiting block and the limiting groove are adapted to each other, and the limiting block is slidably connected inside the limiting groove.

[0006] As a preferred embodiment of this utility model, both the first mounting plate and the second mounting plate are arc-shaped structures. The first mounting plate is fixed to the second flange by bolts, and the second mounting plate is fixed to the first flange by bolts.

[0007] In a preferred embodiment of this invention, one end of the reset spring is fixedly connected to the first mounting plate, and the other end of the reset spring is fixedly connected to the second mounting plate.

[0008] In a preferred embodiment of this invention, the center point of the hollow tube and the center point of the guide rod are located on the same vertical line, and the length of the hollow tube is less than the length of the guide rod.

[0009] As a preferred embodiment of this utility model, the length of the telescopic plate is greater than the length of the limiting frame, and the telescopic plate is slidably connected inside the limiting frame.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] The reset mechanism provides support between the first and second flanges, preventing angular displacement during use. The guide rod's extension and retraction within the hollow tube provides initial support, while the telescopic plate's extension and retraction within the limit frame provides secondary support. This double-layer support significantly enhances the support effect between the first and second flanges, preventing deformation and damage to the lugs due to long-term shear forces, thus ensuring the normal operation of the bellows compensator. The coordinated action of the reset spring, guide rod, and hollow tube facilitates rapid reset of the bellows after deformation. Furthermore, the bellows' deformation causes the telescopic plate to move within the limit frame. The scale lines on the telescopic plate and limit frame allow for easy observation of the bellows' resilience, enabling timely adjustments by operators. This bellows compensator offers excellent compensation and is convenient for practical use. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of an automatically reset pipeline thermal displacement compensator according to the present invention.

[0013] Figure 2 This is a schematic diagram of the reset mechanism in an automatically resettable pipeline thermal displacement compensator according to this utility model.

[0014] Figure 3 This is a schematic diagram of the limiting frame in an automatically reset pipeline thermal displacement compensator according to this utility model.

[0015] In the diagram: 1. Bellows; 2. First flange; 21. First lug; 3. Second flange; 31. Second lug; 4. Screw; 5. Reset mechanism; 51. Limiting frame; 511. Limiting groove; 52. First mounting plate; 53. Telescopic plate; 54. Second mounting plate; 55. Hollow tube; 56. Guide rod; 57. Reset spring; 58. Limiting block; 59. Scale line. Detailed Implementation

[0016] 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 protection scope of the present utility model.

[0017] Please see Figures 1 to 3 This utility model provides an automatically resettable pipe thermal displacement compensator, including a bellows 1, a first flange 2 fixedly connected to the top of the bellows 1, and a second flange 3 fixedly connected to the bottom of the bellows 1. Multiple first lugs 21 are circumferentially welded to the periphery of the first flange 2, and multiple second lugs 31 are circumferentially welded to the periphery of the second flange 3. A screw 4 is threadedly connected between the first lugs 21 and the second lugs 31. Reset mechanisms 5 are provided on both the front and rear sides of the bellows 1. The reset mechanism 5 includes a limit frame 51 and a first mounting plate. The bottom end of the limiting frame 51 is fixedly connected to the first mounting plate 52 and the inside of the limiting frame 51 is installed with the telescopic plate 53. The top end of the telescopic plate 53 is fixedly connected to the second mounting plate 54. The top of the first mounting plate 52 is fixedly connected to two hollow tubes 55. The top of the hollow tubes 55 is inserted with guide rods 56. The hollow tubes 55 and guide rods 56 are fitted with reset springs 57. Limiting blocks 58 are fixedly connected to both sides of the telescopic plate 53. The front surface of the telescopic plate 53 and the front surface of the limiting frame 51 are both provided with scale lines 59.

[0018] Furthermore, both sides of the inner wall of the limiting frame 51 are longitudinally provided with limiting grooves 511. The limiting block 58 is adapted to the limiting groove 511. The limiting block 58 is slidably connected inside the limiting groove 511. The matching design of the limiting groove 511 and the limiting block 58 ensures that the telescopic plate 53 can only slide in the vertical direction within the limiting frame 51, avoiding lateral deviation or shaking.

[0019] Furthermore, both the first mounting plate 52 and the second mounting plate 54 are arc-shaped structures. The first mounting plate 52 is fixed to the second flange 3 by bolts, and the second mounting plate 54 is fixed to the first flange 2 by bolts. The arc-shaped design fits the curved surfaces of the first flange 2 and the second flange 3, improving the fit and firmness of the installation. The bolt connection facilitates disassembly and maintenance, while also dispersing stress and reducing the risk of local deformation.

[0020] Furthermore, one end of the return spring 57 is fixed to the first mounting plate 52, and the other end of the return spring 57 is fixed to the second mounting plate 54.

[0021] Furthermore, the center point of the hollow tube 55 and the center point of the guide rod 56 are located on the same vertical line. The length of the hollow tube 55 is less than the length of the guide rod 56. When the guide rod 56 extends and retracts inside the hollow tube 55, it maintains vertical guidance to avoid the return spring 57 being biased by force. The length difference ensures that the guide rod 56 always has a sufficient support section to prevent it from coming out or getting stuck.

[0022] Furthermore, the length of the telescopic plate 53 is greater than the length of the limiting frame 51, and the telescopic plate 53 is slidably connected inside the limiting frame 51.

[0023] Working principle: When the pipeline expands and contracts due to temperature changes, the bellows 1 absorbs axial displacement through its elastic deformation. A first flange 2 and a second flange 3 are fixed to the top and bottom of the bellows 1, respectively. The first flange 2 and the second flange 3 are connected to the screw 4 via a first lug 21 and a second lug 31, forming a rigid support structure. The threaded connection of the screw 4 allows adjustment of the initial distance between the first flange 2 and the second flange 3 to adapt to different working conditions. Two sets of reset mechanisms 5 are located at the front and rear of the bellows 1, respectively. The bellows 1 is composed of a limiting frame 51, a telescopic plate 53, a hollow tube 55, a guide rod 56, and a return spring 57. When the bellows 1 deforms due to thermal displacement, the relative displacement between the first flange 2 and the second flange 3 will cause the telescopic plate 53 to slide within the limiting frame 51. The limiting blocks 58 on both sides of the telescopic plate 53 cooperate with the limiting grooves 511 on the inner wall of the limiting frame 51 to ensure that the telescopic plate 53 can only move in the vertical direction and avoid lateral displacement. One end of the return spring 57 is fixed on the first mounting plate 52, and the other end is fixed on the second mounting plate. On 54, when the bellows 1 deforms due to thermal expansion and contraction, the return spring 57 is compressed or stretched, storing elastic potential energy. Once the temperature recovers or the external force disappears, the return spring 57 releases its potential energy, pushing the telescopic plate 53 back to its initial position, thereby causing the bellows 1 to quickly reset. The telescopic movement of the guide rod 56 within the hollow tube 55 provides vertical guidance for the return spring 57, ensuring a smooth reset process. Both the telescopic plate 53 and the front surface of the limit frame 51 are equipped with scale lines 59 for real-time observation of the displacement of the bellows 1. 59. Staff can determine whether the rebound performance of the bellows 1 is normal and adjust the tightness of the screw 4 or check the status of the reset mechanism 5 in a timely manner to ensure the long-term stable operation of the compensator. The reset mechanism 5 forms a double-layer support structure through the hollow tube 55, guide rod 56 and telescopic plate 53, which significantly improves the support effect between the first flange 2 and the second flange 3. This design effectively disperses the shear force and avoids the first ear seat 21 and the second ear seat 31 from deforming or being damaged due to long-term stress, thus extending the service life of the bellows compensator.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-resetting pipe thermal displacement compensator, comprising a bellows (1), characterized in that, The top of the bellows (1) is fixedly connected to a first flange (2), and the bottom of the bellows (1) is fixedly connected to a second flange (3). Multiple first lugs (21) are welded to the outer periphery of the first flange (2), and multiple second lugs (31) are welded to the outer periphery of the second flange (3). A screw (4) is threaded between the first lugs (21) and the second lugs (31). Reset mechanisms (5) are provided on both the front and rear sides of the bellows (1). The reset mechanism (5) includes a limit frame (51), a first mounting plate (52), and a telescopic plate (53). The limit frame (51) The bottom end is fixed with a first mounting plate (52), and the inside of the limiting frame (51) is installed with a telescopic plate (53). The top end of the telescopic plate (53) is fixed with a second mounting plate (54). The top of the first mounting plate (52) is fixed with two hollow tubes (55). The top of the hollow tubes (55) is inserted with a guide rod (56). The hollow tubes (55) and the guide rods (56) are fitted with a reset spring (57). Limiting blocks (58) are fixed on both sides of the telescopic plate (53). The front surface of the telescopic plate (53) and the front surface of the limiting frame (51) are both provided with scale lines (59).

2. The automatically resettable pipeline thermal displacement compensator according to claim 1, characterized in that, The inner walls of the limiting frame (51) are longitudinally provided with limiting grooves (511) on both sides. The limiting block (58) and the limiting groove (511) are adapted to each other, and the limiting block (58) is slidably connected inside the limiting groove (511).

3. The automatically resettable pipeline thermal displacement compensator according to claim 2, characterized in that, Both the first mounting plate (52) and the second mounting plate (54) are arc-shaped structures. The first mounting plate (52) is fixed to the second flange (3) by bolts, and the second mounting plate (54) is fixed to the first flange (2) by bolts.

4. The automatically resettable pipeline thermal displacement compensator according to claim 3, characterized in that, One end of the reset spring (57) is fixed to the first mounting plate (52), and the other end of the reset spring (57) is fixed to the second mounting plate (54).

5. The automatically resettable pipeline thermal displacement compensator according to claim 4, characterized in that, The center point of the hollow tube (55) and the center point of the guide rod (56) are located on the same vertical line, and the length of the hollow tube (55) is less than the length of the guide rod (56).

6. The automatically resettable pipeline thermal displacement compensator according to claim 5, characterized in that, The length of the telescopic plate (53) is greater than the length of the limiting frame (51), and the telescopic plate (53) is slidably connected inside the limiting frame (51).

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