Telescopic joint with position-limiting locking device

Abstract

The utility model relates to telescopic joint technical field and disclose a telescopic joint with spacing locking device, including outer sleeve and inner sleeve, the one end of outer sleeve inserts into inner sleeve, the outer circle fixed mounting of one end of inner sleeve at outer sleeve department has first flange. Through first connecting rod connection first flange and first connecting plate, second connecting rod is equipped between first connecting plate and second connecting plate, forms stable structure, strengthens telescopic joint overall stability, rubber strip is equipped between steel hoop and outer sleeve, cooperates with the hook of steel hoop one end fixed and other end handle upper pull rod connected hasp, can effectively spacing locking inner sleeve telescopic, rotates handle and can easily lock or loosen steel hoop, convenient operation, the spacing ring of mounting plate on steel hoop cooperates with handle spacing plate, can prevent handle relaxation after locking, locking is reliable, handle inner moving plate, spring and extruding block, when locking, spring elasticity makes extruding block extrude mounting seat, makes spacing ring tightly hook on handle, promotes operation safety.

Description

Technical Field

[0001] This utility model relates to the field of expansion joint technology, specifically an expansion joint with a limiting locking device. Background Technology

[0002] In many engineering applications, expansion joints are key devices used to connect pipes, equipment, and other components to accommodate their expansion and contraction due to temperature changes, stress deformation, and other factors. Traditional expansion joints typically consist of an outer sleeve and an inner sleeve, with the expansion and contraction function achieved through the relative sliding of the inner sleeve within the outer sleeve. However, in actual use, this type of expansion joint lacks an effective limiting and locking mechanism. Under conditions such as pressure fluctuations or equipment vibration in the pipeline system, the inner sleeve may experience undesirable excessive sliding within the outer sleeve, leading to misalignment of pipe connections, seal failure, and ultimately, serious problems such as media leakage, affecting the normal operation and safety of the entire system.

[0003] To address the locking issue of expansion joints, some existing technologies have attempted to lock them in place. Some expansion joints use a simple bolt connection method, but this method is cumbersome. After the expansion joint is adjusted to the appropriate position, multiple bolts need to be tightened one by one, which not only consumes a lot of time and manpower, but also makes the process of disassembling and reinstalling the bolts complicated when the position of the expansion joint needs to be adjusted again. To avoid the above problems, we propose an expansion joint with a limit locking device. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a telescopic joint with a limiting locking device to solve the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a telescopic joint with a limiting locking device, comprising an outer sleeve and an inner sleeve, one end of the outer sleeve being inserted into the inner sleeve, and a first flange being fixedly installed on the outer ring of the inner sleeve located outside the outer sleeve, with a plurality of first connecting rods evenly fixedly installed on the bottom surface of the first flange, a first connecting plate and a second connecting plate being provided on the outer ring of the outer sleeve, and a plurality of second connecting rods being evenly installed on the side of the first connecting plate and the second connecting plate that are close to each other, a steel hoop being provided on the outer ring of the outer sleeve and located between the first connecting plate and the second connecting plate, a fixing hook being fixedly installed on the outer wall of one end of the steel hoop, and a mounting seat being fixedly installed on the outer wall of the other end of the steel hoop, with a handle being provided on the mounting seat, and pull rods being hinged to the two side walls of the handle, and buckles being welded to the side of the other ends of the two pull rods that are close to each other, and the buckles can be fastened to the fixing hook.

[0006] As a preferred embodiment of this utility model, the upper outer ring and the lower outer ring of the outer sleeve are both fixedly installed with second flanges, and a plurality of first connecting rods pass through the second flanges installed on the upper outer ring of the outer sleeve, and the end of the first connecting rod away from the first flange is fixedly connected to the top surface of the first connecting plate.

[0007] As a preferred embodiment of this utility model, the mounting base has two fixing plates welded to both sides of the side wall away from the steel hoop. The two fixing plates are hinged to the right end of the handle on the side closest to each other. The pull rods hinged to both sides of the handle are located on the left side of the fixing plates.

[0008] As a preferred embodiment of this utility model, the steel hoop is fixedly mounted on the outer wall of one side of the mounting base, and a limit ring is hinged to the side of the mounting plate away from the steel hoop.

[0009] As a preferred technical solution of this utility model, a limiting plate is fixedly installed on one side wall of the handle, the limiting ring can be fastened to one side of the limiting plate installed on the handle, and a rubber strip is provided between the steel hoop and the outer sleeve.

[0010] As a preferred technical solution of this utility model, a cavity is provided on the side of the handle near the mounting base, and a movable plate is provided in the cavity. A spring is provided on the side of the movable plate that is close to the inner wall of the cavity on the handle. A pressing block that penetrates through and extends to the outside of the handle is fixedly installed on the side of the movable plate near the mounting base.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. This type of expansion joint with a limiting and locking device connects a first flange and a first connecting plate via a first connecting rod. A second connecting rod is provided between the first and second connecting plates, forming a stable connection structure and enhancing the overall stability of the expansion joint. At the same time, a rubber strip is provided between the steel hoop and the outer sleeve, and a buckle is connected to the fixing hook at one end of the steel hoop and the pull rod on the other end of the handle. This effectively limits and locks the inner sleeve after expansion and contraction. The steel hoop can be locked and released by turning the handle, making the operation simple and convenient.

[0012] 2. This type of telescopic joint with a limit locking device, through the limit ring hinged to the mounting plate on the steel hoop and the limit plate on the handle, can limit the handle after locking to prevent it from loosening and ensure the reliability of locking. In addition, the moving plate, spring and pressing block set inside the handle can make the pressing block press against the mounting base through the elastic force of the spring during locking, further improving the safety of locking operation. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the separate structure of the first connecting plate and the second connecting plate of this utility model; Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a side view of the handle structure of this utility model; Figure 5 This is a cross-sectional view of one side of the handle of this utility model.

[0014] In the diagram: 1. Outer sleeve; 2. Inner sleeve; 3. First flange; 4. Second flange; 5. First connecting rod; 6. First connecting plate; 7. Handle; 8. Second connecting plate; 9. Steel hoop; 10. Second connecting rod; 11. Rubber strip; 12. Pull rod; 13. Fixing hook; 14. Limiting plate; 15. Mounting plate; 16. Limiting ring; 17. Mounting seat; 18. Buckle; 19. Fixing plate; 20. Extrusion block; 21. Moving plate; 22. Spring. Detailed Implementation

[0015] 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.

[0016] Example 1: Please refer to Figures 1-5 A telescopic joint with a limiting locking device includes an outer sleeve 1 and an inner sleeve 2. The outer sleeve 1 and the inner sleeve 2 are prepared, and the inner sleeve 2 is inserted into one end of the outer sleeve 1. The insertion is smooth and the position is accurate. A first flange 3 is fixedly installed on the outer ring of the inner sleeve 2 located outside the outer sleeve 1 by welding. Multiple first connecting rods 5 are evenly welded to the bottom surface of the first flange 3.

[0017] Next, second flanges 4 are welded to both the upper and lower outer rings of the outer sleeve 1. Multiple first connecting rods 5 are respectively passed through the second flanges 4 installed on the upper outer ring of the outer sleeve 1, and the end of the first connecting rod 5 away from the first flange 3 is welded and fixed to the top surface of the first connecting plate 6. The second connecting plate 8 is installed at a suitable position on the outer ring of the outer sleeve 1, and multiple second connecting rods 10 are evenly welded to the side where the first connecting plate 6 and the second connecting plate 8 are close to each other.

[0018] Then, a steel hoop 9 is placed on the outer ring of the outer sleeve 1 between the first connecting plate 6 and the second connecting plate 8. The width of the steel hoop 9 matches the distance between the first connecting plate 6 and the second connecting plate 8. A fixing hook 13 is welded to the outer wall of one end of the steel hoop 9, and a mounting seat 17 is welded to the outer wall of the other end of the steel hoop 9. Fixing plates 19 are welded to both sides of the side wall of the mounting seat 17 away from the steel hoop 9. The right end of the handle 7 is placed on the side of the two fixing plates 19 that are close to each other, and hinged through the hinge shaft so that the handle 7 can rotate around the hinge point. Pull rods 12 are hinged to the side walls of both sides of the handle 7, and the two pull rods 12 are located on the left side of the fixing plate 19. Buckles 18 are welded to the side of the other end of the two pull rods 12 that are close to each other.

[0019] A mounting plate 15 is welded to the outer wall of the steel hoop 9 on one side of the mounting base 17. A limiting ring 16 is hinged to the side of the mounting plate 15 away from the steel hoop 9. A limiting plate 14 is welded to the side wall of the handle 7. A rubber strip 11 is placed between the steel hoop 9 and the outer sleeve 1 to provide compression and fixation.

[0020] When it is necessary to lock the expansion joint, tighten the steel hoop 9 around the outer sleeve 1 so that the buckle 18 is fastened to the fixed hook 13. Then turn the handle 7. The handle 7 drives the pull rod 12 to move. The pull rod 12 pulls the buckle 18 to further tighten the steel hoop 9, thus achieving locking. After locking, fasten the limit ring 16 to one side of the limit plate 14 on the handle 7 to prevent the handle 7 from loosening.

[0021] Example 2: Please refer to Figures 1-5 Based on Embodiment 1, the handle 7 is further improved by opening a cavity on the side of the handle 7 near the mounting base 17, placing a movable plate 21 in the cavity, installing a spring 22 between the movable plate 21 and the inner wall of the cavity on one side of the handle 7, and fixing a pressing block 20 that penetrates and extends to the outside of the handle 7 on the side of the movable plate 21 near the mounting base 17.

[0022] During the locking of the telescopic joint, when the handle 7 is rotated, it drives the pull rod 12 to tighten the steel hoop 9. The pressing block 20 will gradually approach the mounting base 17 as the handle 7 rotates and continue to press the handle 7. Then, the limiting ring 16 can be fastened to one side of the limiting plate 14 installed on the handle 7, completing the limiting locking operation of the limiting ring 16 on the handle 7. After releasing the handle 7, the pressing block 20 will be subjected to the reaction force of the mounting base 17, pushing the moving plate 21 to move into the cavity and compressing the spring 22. The elastic force of the spring 22 will be fed back to the handle 7, causing the handle 7 to move in the opposite direction. At this time, the limiting ring 16 can be firmly fastened to one side of the limiting plate 14 installed on the handle 7. When unlocking is required, first press the handle 7 towards the mounting base 17. At this time, the limiting ring 16 can be removed from the handle 7. Then rotate the handle 7 in the opposite direction. At this time, the buckle 18 installed on the pull rod 12 will be removed from the fixed hook 13, realizing the relaxation of the tension on the steel hoop 9, making the steel hoop 9 loose and unlocking.

[0023] Implementation effect: The first connecting rod 5 connects the first flange 3 and the first connecting plate 6, and the second connecting rod 10 is set between the first connecting plate 6 and the second connecting plate 8, forming a stable connection structure and enhancing the overall stability of the expansion joint. At the same time, a rubber strip 11 is set between the steel hoop 9 and the outer sleeve 1, and a buckle 18 is connected to the fixing hook 13 at one end of the steel hoop 9 and the pull rod 12 on the handle 7 at the other end, which can effectively limit and lock the inner sleeve 2 after expansion and contraction. The steel hoop 9 can be locked and loosened by turning the handle 7, which is simple and convenient to operate.

[0024] The limiting ring 16, which is hinged to the mounting plate 15 on the steel hoop 9, cooperates with the limiting plate 14 on the handle 7 to limit the handle 7 after locking, preventing it from loosening and ensuring the reliability of locking. In addition, the movable plate 21, spring 22 and pressing block 20 provided inside the handle 7 can press the pressing block 20 against the mounting base 17 through the elastic force of the spring 22 when locking, further improving the safety of locking operation.

[0025] 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 telescopic joint with a limiting and locking device, comprising an outer sleeve (1) and an inner sleeve (2), characterized in that: One end of the outer sleeve (1) is inserted into the inner sleeve (2). A first flange (3) is fixedly installed on the outer ring of the inner sleeve (2) located outside the outer sleeve (1). A plurality of first connecting rods (5) are evenly fixedly installed on the bottom surface of the first flange (3). A first connecting plate (6) and a second connecting plate (8) are provided on the outer ring of the outer sleeve (1). A plurality of second connecting rods (10) are evenly installed on the side of the first connecting plate (6) and the second connecting plate (8) that are close to each other. A steel hoop (9) is provided between the first connecting plate (6) and the second connecting plate (8). A fixing hook (13) is fixedly installed on the outer wall of one end of the steel hoop (9), and a mounting base (17) is fixedly installed on the outer wall of the other end of the steel hoop (9). A handle (7) is provided on the mounting base (17), and pull rods (12) are hinged to the side walls of the handle (7). A buckle (18) is welded to the side of the other end of the two pull rods (12) that are close to each other, and the buckle (18) can be fastened to the fixing hook (13).

2. The telescopic joint with a limiting locking device according to claim 1, characterized in that: The upper outer ring and lower outer ring of the outer sleeve (1) are both fixedly installed with second flanges (4), and multiple first connecting rods (5) pass through the second flanges (4) installed on the upper outer ring of the outer sleeve (1), and the end of the first connecting rod (5) away from the first flange (3) is fixedly connected to the top surface of the first connecting plate (6).

3. A telescopic joint with a limiting locking device according to claim 1, characterized in that: The mounting base (17) has two fixing plates (19) welded on both sides of the side wall away from the steel hoop (9). The two fixing plates (19) are hinged to the right end of the handle (7) on the side that is close to each other. The pull rods (12) hinged on both sides of the handle (7) are located on the left side of the fixing plates (19).

4. A telescopic joint with a limiting locking device according to claim 1, characterized in that: The steel hoop (9) is fixedly mounted on the outer wall of the mounting base (17) on one side, and a limit ring (16) is hinged to the side of the mounting plate (15) away from the steel hoop (9).

5. A telescopic joint with a limiting locking device according to claim 4, characterized in that: A limiting plate (14) is fixedly installed on one side wall of the handle (7), and the limiting ring (16) can be fastened to one side of the limiting plate (14) installed on the handle (7). A rubber strip (11) is provided between the steel hoop (9) and the outer sleeve (1).

6. A telescopic joint with a limiting locking device according to claim 1, characterized in that: The handle (7) has a cavity on the side near the mounting base (17), and a movable plate (21) is provided in the cavity. A spring (22) is provided on the side of the movable plate (21) and the inner wall of the cavity on the handle (7) that are close to each other. A pressing block (20) that penetrates through and extends to the outside of the handle (7) is fixedly installed on the side of the movable plate (21) near the mounting base (17).

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