An expansion joint

Abstract

The utility model provides an expansion joint belongs to expansion joint technical field, including bellows and adjusting sleeve, the both ends symmetrical of bellows are provided with the connecting flange plate, the outside of connecting flange plate is evenly provided with lug plate A, two lug plate A one -to -one corresponds, and the corresponding two lug plate A between mutual penetration has screw track pole, and the both ends of screw track pole are screwed with adjusting nut, and adjusting nut is placed outside connecting flane plate, adjusting sleeve is circular, adjusting sleeve slides outside bellows, adjusting sleeve is provided with two and is placed between two connecting flange plate, adjusting sleeve surface is evenly provided with lug plate B, and screw track pole penetrates lug plate B. The bolt on the surface of the plurality of screw track rods is replaced by an integral adjusting sleeve to ensure that the limiting distance on the surface of the plurality of screw track rods is consistent. When the expansion joint deforms by the maximum amount, the end flange plates are consistently limited, ensuring uniform stress.

Description

Technical Field

[0001] This utility model belongs to the field of expansion joint technology, and specifically relates to an expansion joint. Background Technology

[0002] Expansion joints, also commonly known as compensators or expansion joints, are flexible structures installed on container shells or pipelines to compensate for additional stress caused by temperature differences and mechanical vibrations. As an elastic compensating element that can freely expand and contract, expansion joints have advantages such as reliable operation, good performance, and compact structure, and have been widely used in chemical, metallurgical, and nuclear energy sectors.

[0003] Expansion joints automatically expand and contract during use to compensate for the pipe's deformation. However, the bellows have limited deformation capacity. Therefore, after installation, the distance between the nuts needs to be adjusted to control the overall deformation of the expansion joint. Existing expansion joints have multiple threaded rail rods on the outside. If the distance between the nuts on the surfaces of the multiple rail rods is not uniform during adjustment, it can easily lead to uneven stress when the expansion joint undergoes maximum deformation. In such cases, the expansion joint will lack stability and is prone to breakage. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide an expansion joint that can ensure consistent distance during adjustment and uniform force distribution when the expansion joint undergoes maximum deformation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An expansion joint includes a bellows and an adjusting sleeve. The bellows has symmetrically arranged connecting flanges at both ends. Ear plates A are evenly distributed on the outer side of each connecting flange, with one ear plate A corresponding to the other on each connecting flange. A threaded track rod passes through the two corresponding ear plates A. Adjusting nuts are screwed onto both ends of the threaded track rod, and the adjusting nuts are positioned on the outer side of the connecting flanges. The adjusting sleeve is annular and slides on the outer side of the bellows. Two adjusting sleeves are provided and positioned between the two connecting flanges. Ear plates B are evenly distributed on the surface of the adjusting sleeve, and the threaded track rod passes through ear plates B. An installation hole is formed inside ear plate B, and a limit block is slidably installed inside the installation hole. A limit groove is evenly formed along the axis on the side of the threaded track rod closest to the center of the bellows, and the end of the limit block is adapted to the internal dimensions of the limit groove.

[0006] Furthermore, an annular boss is provided on the inner surface of the mounting hole, and a connecting rod is provided at the end of the limiting block opposite to the threaded track rod. The connecting rod passes through the annular boss, and an extrusion head is provided at the end of the connecting rod opposite to the limiting block. The surface of the extrusion head opposite to the connecting rod is set as an arc surface.

[0007] Furthermore, a spring is sleeved on the surface of the connecting rod, the spring is placed inside the mounting hole, one end of the spring is in contact with the surface of the annular boss, and the other end of the spring is in contact with the surface of the extrusion head.

[0008] Furthermore, the adjusting sleeve has an arc-shaped slide rail inside, which corresponds to the position of the ear plate B. The end of the extrusion head away from the connecting rod is placed inside the arc-shaped slide rail. A conical slider is slidably installed inside the arc-shaped slide rail, and the end of the extrusion head contacts the inclined surface of the conical slider.

[0009] Furthermore, an installation platform is provided on the outer surface of the adjusting sleeve, and a movable cavity is opened inside the adjusting sleeve. The movable cavity and the arc-shaped slide are distributed alternately. A movable block is slidably installed inside the installation platform, and an adjusting bolt is screwed onto the surface of the installation platform. The end of the adjusting bolt is mounted on the surface of the movable block through a bearing. A connecting rod is symmetrically hinged to the end of the movable block opposite to the adjusting bolt.

[0010] Furthermore, a slide rod is hinged to one end of the connecting rod away from the moving block. The slide rod slides between the arc-shaped slide track and the movable cavity, and the end of the slide rod away from the connecting rod is fixed on the conical slider.

[0011] Furthermore, an inner sleeve is welded to the inner side of the water inlet end of the corrugated pipe.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the bolts on the surfaces of multiple threaded track rods are replaced by an integral adjusting sleeve to ensure the consistency of the limiting distance on the surfaces of multiple threaded track rods. When the expansion joint undergoes the maximum deformation, the end flange plate is limited in a consistent manner to ensure uniform force distribution and prevent the expansion joint from breaking due to uneven deformation. Furthermore, during adjustment, the limiting distance of the two threaded track rods can be controlled simultaneously by rotating the adjusting bolt, improving the convenience of adjustment. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the adjusting sleeve of this utility model; Figure 3 This is a longitudinal sectional view of the adjusting sleeve of this utility model; Figure 4 For the present utility model Figure 3 A magnified structural diagram of area A; Figure 5 For the present utility model Figure 3 A magnified structural diagram of region B.

[0014] The attached diagram lists the components represented by each number as follows: 1. Connecting flange plate; 101. Ear plate A; 2. Threaded rail rod; 201. Limiting groove; 3. Bellows; 4. Inner sleeve; 5. Adjusting nut; 6. Adjusting sleeve; 7. Ear plate B; 8. Mounting hole; 9. Annular boss; 10. Limiting block; 11. Connecting rod; 12. Spring; 13. Extrusion head; 14. Arc-shaped slide; 15. Conical slider; 16. Slide rod; 17. Mounting platform; 18. Moving block; 19. Adjusting bolt; 20. Connecting rod; 21. Movable cavity. Detailed Implementation

[0015] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0016] like Figures 1-4 As shown, an expansion joint includes a bellows 3 and an adjusting sleeve 6. Connecting flanges 1 are symmetrically arranged at both ends of the bellows 3. Ear plates A101 are evenly arranged on the outer side of the connecting flanges 1, with each ear plate A101 corresponding to the previous one. A threaded track rod 2 passes through the two corresponding ear plates A101. Adjusting nuts 5 are screwed onto both ends of the threaded track rod 2 and are positioned on the outer side of the connecting flanges 1. The adjusting sleeve 6 is annular, with its inner diameter larger than the outer diameter of the bellows 3 to ensure it does not contact the surface of the bellows 3 during adjustment. The adjusting sleeve 6 slides on... Two adjusting sleeves 6 are provided on the outside of the bellows 3 and placed between the two connecting flange plates 1. The surface of the adjusting sleeve 6 is evenly provided with ear plates B7. The threaded rail rod 2 passes through the ear plate B7 so that the entire adjusting sleeve 6 can only slide axially along the surface of the threaded rail rod 2. The ear plate B7 is provided with a mounting hole 8. A limit block 10 is slidably installed inside the mounting hole 8. The surface of the threaded rail rod 2 near the center of the bellows 3 is evenly provided with a limit groove 201 along the axis. The end of the limit block 10 is adapted to the internal size of the limit groove 201. The cooperation between the two ensures the stability of the position of the adjusting sleeve 6.

[0017] like Figure 3 and Figure 4As shown, an annular boss 9 is provided on the inner surface of the mounting hole 8. A connecting rod 11 is provided at the end of the limiting block 10 away from the threaded track rod 2. The connecting rod 11 passes through the annular boss 9. A pressing head 13 is provided at the end of the connecting rod 11 away from the limiting block 10. The surface of the pressing head 13 away from the connecting rod 11 is set as an arc surface. A spring 12 is sleeved on the surface of the connecting rod 11. The spring 12 is placed inside the mounting hole 8. One end of the spring 12 is in contact with the surface of the annular boss 9. The annular boss 9 can provide a force point for one end of the spring 12, and the other end of the spring 12 is in contact with the surface of the pressing head 13. An adjustment sleeve 6 is provided inside. There is an arc-shaped slide 14, which corresponds to the position of the ear plate B7. The end of the extrusion head 13 away from the connecting rod 11 is placed inside the arc-shaped slide 14. A conical slider 15 is slidably installed inside the arc-shaped slide 14. The end of the extrusion head 13 contacts the inclined surface of the conical slider 15. Pushing the conical slider 15 can extrude the extrusion head 13, so that the limiting block 10 at the other end cooperates with the limiting groove 201 to achieve fixation. Conversely, when the conical slider 15 does not extrude the extrusion head 13, the elastic force of the spring 12 is used to disengage the limiting block 10 from the limiting groove 201, so as to facilitate the movement of the adjustment sleeve 6.

[0018] like Figures 3-5 As shown, an installation platform 17 is provided on the outer surface of the adjusting sleeve 6. An movable cavity 21 is opened inside the adjusting sleeve 6. The movable cavity 21 and the arc-shaped slide rail 14 are distributed alternately. A movable block 18 is slidably installed inside the installation platform 17. An adjusting bolt 19 is screwed onto the surface of the installation platform 17. The end of the adjusting bolt 19 is mounted on the surface of the movable block 18 through a bearing. A connecting rod 20 is symmetrically hinged to the end of the movable block 18 away from the adjusting bolt 19. A sliding rod 16 is hinged to the end of the connecting rod 20 away from the movable block 18. The sliding rod 16 slides between the arc-shaped slide rail 14 and the movable cavity 21. The end of the sliding rod 16 away from the connecting rod 20 is fixed on the conical slider 15. The connection direction of the connecting rod 20 should ensure that when the internal movable block 18 is moved closer to the center of the adjusting sleeve 6 by controlling the adjusting bolt 19, the conical sliders 15 at both ends can be pushed outward.

[0019] like Figure 1 As shown, an inner sleeve 4 is welded to the inner side of the water inlet end of the corrugated pipe 3 to prevent substances passing through it from coming into contact with the inside of the corrugated pipe 3.

[0020] The working principle of this utility model is as follows: During installation, the flange plate 1 is fixed by connecting the through holes on both ends and the bolts. During installation, ensure that one end of the welded inner sleeve 4 is the water inlet end. Tightening the adjusting nut 5 can adjust the connecting flange plate 1 to facilitate the squeezing of the inner bellows 3, which facilitates docking and installation. Due to the presence of the spring 12, the squeezing head 13 has a force in the center direction of the adjusting sleeve 6. When adjusting the adjusting sleeve 6, the adjusting bolt 19 can be rotated to drive the moving block 18 to move inside the mounting platform 17. Then, the two connecting rods 20 simultaneously pull the sliding rod 16 closer to each other, so that the conical slider 15 no longer squeezes the squeezing head 13. At this time, the elastic force of the spring 12 can be used to make the limiting block 10 move down and disengage from the limiting groove 201. At this time, the adjusting sleeve 6 can be slid along the surface of the threaded track rod 2 for adjustment. After the adjustment is completed, the adjusting bolt 19 is tightened in the opposite direction to squeeze the squeezing head 13 again through the conical slider 15, so that the limiting block 10 moves up and re-engages with the corresponding limiting groove 201 to achieve fixation.

[0021] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. An expansion joint, comprising a bellows (3) and an adjusting sleeve (6), characterized in that: The bellows (3) is symmetrically provided with connecting flange plates (1) at both ends. Ear plates A (101) are evenly provided on the outer side of the connecting flange plates (1). The ear plates A (101) on the surfaces of the two connecting flange plates (1) correspond one to one. A threaded track rod (2) passes through the two corresponding ear plates A (101). Adjusting nuts (5) are screwed on both ends of the threaded track rod (2). The adjusting nuts (5) are placed on the outer side of the connecting flange plates (1). The adjusting sleeve (6) is annular and slides on the outer side of the bellows (3). Two adjusting sleeves (6) are provided and placed between the two connecting flange plates (1). Ear plates B (7) are evenly provided on the surface of the adjusting sleeves (6). The threaded rail rod (2) passes through the ear plate B (7). An installation hole (8) is provided inside the ear plate B (7). A limit block (10) is slidably installed inside the installation hole (8). A limit groove (201) is evenly provided along the axis on the side surface of the threaded rail rod (2) near the center of the bellows (3). The end of the limit block (10) is adapted to the internal size of the limit groove (201).

2. An expansion joint according to claim 1, characterized in that: The mounting hole (8) has an annular boss (9) on its inner surface. The limiting block (10) has a connecting rod (11) at one end away from the threaded track rod (2). The connecting rod (11) passes through the annular boss (9). The connecting rod (11) has an extrusion head (13) at one end away from the limiting block (10). The surface of the extrusion head (13) at one end away from the connecting rod (11) is an arc surface.

3. An expansion joint according to claim 2, characterized in that: A spring (12) is fitted on the surface of the connecting rod (11). The spring (12) is placed inside the mounting hole (8). One end of the spring (12) is in contact with the surface of the annular boss (9), and the other end of the spring (12) is in contact with the surface of the extrusion head (13).

4. An expansion joint according to claim 3, characterized in that: The adjustment sleeve (6) has an arc-shaped slide (14) inside, which corresponds to the position of the ear plate B (7). The end of the extrusion head (13) away from the connecting rod (11) is placed inside the arc-shaped slide (14). A conical slider (15) is slidably installed inside the arc-shaped slide (14), and the end of the extrusion head (13) is in contact with the inclined surface of the conical slider (15).

5. An expansion joint according to claim 4, characterized in that: The outer surface of the adjusting sleeve (6) is provided with a mounting platform (17). The adjusting sleeve (6) has an open movable cavity (21) inside. The movable cavity (21) and the arc-shaped slide (14) are distributed alternately. A moving block (18) is slidably installed inside the mounting platform (17). An adjusting bolt (19) is screwed onto the surface of the mounting platform (17). The end of the adjusting bolt (19) is mounted on the surface of the moving block (18) through a bearing. A connecting rod (20) is symmetrically hinged to the end of the moving block (18) away from the adjusting bolt (19).

6. An expansion joint according to claim 5, characterized in that: The connecting rod (20) is hinged to a slide rod (16) at one end away from the moving block (18). The slide rod (16) slides between the arc-shaped slide rail (14) and the movable cavity (21). The end of the slide rod (16) away from the connecting rod (20) is fixed on the conical slider (15).

7. An expansion joint according to claim 1, characterized in that: The corrugated pipe (3) has an inner sleeve (4) welded to the inside of the water inlet end.

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