Split type expansion joint and using method thereof

Abstract

The invention discloses a split type expansion joint, and belongs to the technical field of expansion joints. A split type expansion joint comprises a first mounting plate and a second mounting plate, a first corrugated sleeve and a second corrugated sleeve are connected between the first mounting plate and the second mounting plate, and a limiting clamping assembly is arranged on the outer wall of one side of the first mounting plate. Meanwhile, the key supporting effect can be achieved on the threaded part through the multiple fixing bolts and the multiple supporting sleeves, stress borne by threads can be effectively dispersed, the situation that the threads are slipped and damaged due to excessive stress concentration is avoided, and the service life of the equipment is prolonged. And the reliability and durability of the pull rod in the long-term use process are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of expansion joints, and more particularly to a split expansion joint and a use method thereof. Background Art

[0002] An expansion joint is a compensating device installed on equipment such as pipelines and containers. It is mainly composed of bellows, pipes, flanges and accessories such as limit devices, guide devices and inner sleeves. The bellows is wavy and is the core component. It can absorb the axial, lateral or angular displacement of the pipeline system through elastic deformation. The pipe is used to connect the bellows and the pipeline to ensure that the medium can enter and exit the expansion joint smoothly. Its materials include metals such as carbon steel, stainless steel, alloy steel and non-metals such as plastics and rubber. The flange is used to connect the expansion joint and the pipeline. It is tightly connected by bolts to ensure sealing. It has different materials and sealing forms. The accessories can limit the displacement of the expansion joint, guide the direction or prevent the medium from corroding and wearing, so as to effectively compensate for the displacement when the size of the pipeline system changes due to temperature changes, mechanical vibrations, etc., prevent equipment damage and ensure the normal operation of the system.

[0003] In current industrial applications, expansion joints are an important pipe compensation device, but their installation and use methods have many problems that need to be improved:

[0004] Most of the existing bellows of expansion joints adopt the two more traditional installation methods of welding and flange connection. This fixed connection mode is not flexible enough to cope with various usage scenarios. When the expansion joint needs to be replaced according to different working conditions, the operator has to spend a lot of time and energy to dismantle the original bellows and then install the new bellows. This process is not only cumbersome and complicated, but also in some occasions with high requirements for production continuity, it may also cause huge economic losses due to long downtime, which brings great inconvenience and trouble to the actual production operation;

[0005] In addition, existing expansion joints are often equipped with tie rod components in their structural design, and these tie rods are currently mostly installed and fixed by means of threaded connections or flange connections. During the actual operation of the expansion joint, especially when performing compensation and correction operations on the pipeline, the tie rods will be subjected to greater stress. Since the threaded tie rods are subjected to long-term stress, their threaded portions are very likely to slip, which will not only seriously affect the connection tightness of the tie rods, thereby causing the expansion joint to be unable to perform its compensation function normally, but once thread slippage occurs, the process of repairing or replacing the tie rods is also relatively complicated, requiring additional manpower, material resources and time costs, which undoubtedly brings many inconveniences to the actual use of the expansion joint, and also poses a potential threat to the safe and stable operation of the entire pipeline system.

[0006] In view of this, we propose a split expansion joint. Summary of the invention

[0007] 1. Technical issues to be solved

[0008] The object of the present invention is to provide a split expansion joint to solve the problems raised in the above background technology.

[0009] 2. Technical solution

[0010] A split expansion joint comprises a mounting plate 1 and a mounting plate 2, wherein a corrugated sleeve 1 and a corrugated sleeve 2 are connected between the mounting plate 1 and the mounting plate 2, a limiting clamping assembly is arranged on the outer wall of one side of the mounting plate 1, the limiting clamping assembly comprises a connecting frame, a connecting plate is arranged on the circumferential outer wall of the mounting plate 1, the mounting plate 2 has the same structure as the mounting plate 1, and a pull rod is threadedly sleeved between the connecting plate of the circumferential outer wall of the mounting plate 2 and the connecting plate of the circumferential outer wall of the mounting plate 1.

[0011] Preferably, the outer walls of the plurality of connecting frames are rotatably connected with rotating threaded rods, and the circumferential outer walls of the rotating threaded rods are sleeved with clamping limiting recessed blocks.

[0012] Preferably, the outer walls of the plurality of connecting plates are further provided with support plates, the inner threads of the plurality of support plates are sleeved with fixing bolts, and the outer walls of the plurality of support plates are further welded with support sleeves.

[0013] Preferably, threads are formed on the circumferential outer walls at both ends of the plurality of pull rods, and fixing holes matching with fixing bolts are formed on the outer walls of the plurality of pull rods.

[0014] Preferably, a clamping seat is provided at one end and the other end of the corrugated sleeve respectively, and a plurality of clamping grooves are provided on the outer walls of the clamping seats.

[0015] Preferably, a plurality of limit blocks are welded on the inner walls of the clamping grooves, and the structure of the second corrugated sleeve is the same as that of the first corrugated sleeve.

[0016] Preferably, the outer wall of the mounting plate 1 is provided with an inner lining tube 1, the outer wall of the mounting plate 2 is provided with an inner lining tube 2, the diameter of the inner lining tube 2 is slightly smaller than that of the inner lining tube 1, and the inner lining tube 2 is sleeved inside the inner lining tube 1.

[0017] A method for using a split expansion joint includes a split expansion joint.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the advantages of the present invention are that when the bellows sleeve needs to be replaced, the operator only needs to rotate the rotating threaded rods on the outer walls of the multiple support frames in sequence. As the rotating threaded rods rotate, the limiting concave blocks sleeved on the outer walls thereof will gradually move away from the limiting blocks on the inner walls of the clamping grooves. When the contact clamping limit is performed, the bellows sleeves 1 and 2 can be quickly disassembled. The whole process is simple to operate, efficient and fast. When installing a new bellows sleeve, it is only necessary to follow the opposite steps, that is, first put the bellows sleeves 1 and 2 accurately in place, and then rotate the rotating threaded rod to make the clamping limiting concave blocks and the limiting blocks tightly engage with each other, and the installation can be completed. This split design fully takes into account the need for frequent replacement of bellows sleeves in actual working conditions, greatly improves the flexibility and convenience of equipment maintenance, effectively reduces the downtime caused by the replacement of bellows sleeves, and provides a strong guarantee for the production continuity of the enterprise.

[0020] At the same time, when installing the tie rod, first use the threads at both ends of the tie rod to sleeve its fine threads on the inside of the connecting plates corresponding to the outer walls of the mounting plates one and two to ensure the initial connection stability, and then lock multiple fixing bolts into the inside of the tie rod. These fixing bolts can not only significantly improve the overall fixing stability of the tie rod, but also cooperate with the support sleeve to play a key supporting role for the threaded part, which can effectively disperse the stress borne by the thread and avoid the occurrence of thread stripping and damage due to excessive stress concentration, greatly improving the reliability and durability of the tie rod during long-term use, reducing the maintenance cost and failure risk of equipment, and laying a solid foundation for the safe and stable operation of the industrial pipeline system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the overall disassembled structure of the present invention;

[0023] Figure 3 A is a schematic diagram of the structure of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure B of the present invention;

[0025] Explanation of the numbers in the figure: 100, mounting plate one; 110, inner liner one; 120, connecting frame; 130, rotating threaded rod; 140, snap-fit ​​limiting recess; 150, connecting plate; 160, supporting plate; 161, fixing bolt; 162, supporting sleeve; 170, pulling rod; 200, mounting plate two; 210, inner liner two; 300, corrugated sleeve one; 310, snap-fit ​​seat; 320, snap-fit ​​groove; 330, limiting block; 400, corrugated sleeve two. DETAILED DESCRIPTION

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] In the description of the present invention, “plurality” means two or more than two, unless otherwise clearly and specifically defined.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] See also Figure 1-4 , the present invention provides a technical solution:

[0030] A split expansion joint comprises a mounting plate 100 and a mounting plate 200, wherein a corrugated sleeve 1 300 and a corrugated sleeve 2 400 are connected between the mounting plate 100 and the mounting plate 200, a limit clamping assembly is arranged on the outer wall of one side of the mounting plate 100, the limit clamping assembly comprises a connecting frame 120, a connecting plate 150 is arranged on the circumferential outer wall of the mounting plate 100, the mounting plate 200 has the same structure as the mounting plate 100, and a pull rod 170 is threadedly sleeved between the connecting plate 150 of the circumferential outer wall of the mounting plate 200 and the connecting plate 150 of the circumferential outer wall of the mounting plate 100.

[0031] In some embodiments, the pull rod 170 mainly serves to limit excessive deformation of the expansion joint and to withstand the thrust of internal pressure.

[0032] Specifically, the outer walls of the plurality of connection frames 120 are rotatably connected with the rotating threaded rods 130 , and the circumferential outer walls of the rotating threaded rods 130 are sleeved with the clamping limiting recessed blocks 140 .

[0033] In some embodiments: the groove on the outer wall of the snap-fit ​​limit recess 140 matches the limit block 330 on the inner wall of the corrugated sleeve 1 300 and the corrugated sleeve 2 400, and its groove matches the combined size of the two limit blocks 330, which facilitates the snap-fit ​​fixation of the corrugated sleeve 1 300 and the corrugated sleeve 2 400.

[0034] Furthermore, support plates 160 are further provided on the outer walls of the plurality of connection plates 150 , fixing bolts 161 are sleeved on the inner threads of the plurality of support plates 160 , and support sleeves 162 are further welded on the outer walls of the plurality of support plates 160 .

[0035] In some embodiments, the plurality of support sleeves 162 can be used to protect the threads on both sides of the pull rod 170 and reduce the risk of thread stripping due to excessive stress.

[0036] Furthermore, threads are provided on the circumferential outer walls at both ends of the plurality of tie rods 170 , and fixing holes matching the fixing bolts 161 are provided on the outer walls of the plurality of tie rods 170 , so as to facilitate further positioning and support of the tie rods 170 .

[0037] Furthermore, the two ends of the corrugated sleeve 300 are respectively provided with a clamping seat 310 , and the outer walls of the plurality of clamping seats 310 are provided with a clamping groove 320 .

[0038] It is worth noting that the inner walls of the plurality of snap-fit ​​grooves 320 are welded with limiting blocks 330 , and the structure of the second corrugated sleeve 400 is the same as that of the first corrugated sleeve 300 , so that the two snap-fit ​​limiting recessed blocks 140 can be used to snap-fit ​​and limit the first corrugated sleeve 300 and the second corrugated sleeve 400 .

[0039] It is worth noting that an inner liner 110 is disposed on the outer wall of the mounting plate 100 , and an inner liner 210 is disposed on the outer wall of the mounting plate 200 . The diameter of the inner liner 210 is slightly smaller than that of the inner liner 110 , and the inner liner 210 is sleeved inside the inner liner 110 .

[0040] A method for using a split expansion joint includes a split expansion joint.

[0041] Working principle: When the need to replace the corrugated sleeve is faced, the operator only needs to rotate the rotating threaded rods 130 on the outer walls of the multiple support frames 120 in sequence. As the rotating threaded rods 130 rotate, the limiting recessed blocks 140 sleeved on the outer walls will gradually move away from the limiting blocks 330 on the inner walls of the snap-in grooves 320. When the contact snap-in limit is performed, the corrugated sleeves 1 300 and 400 can be quickly removed. The whole process is simple, efficient and fast. When installing a new corrugated sleeve, only the opposite steps need to be followed, that is, first put the corrugated sleeves 1 300 and 400 accurately in place, and then rotate the rotating threaded rods 130 so that the snap-in limiting recessed blocks 140 and the limiting blocks 330 are tightly engaged to complete the installation. This split design fully takes into account the need for frequent replacement of the corrugated sleeves in actual working conditions, greatly improves the flexibility and convenience of equipment maintenance, and effectively reduces The downtime caused by the replacement of the corrugated sleeve is reduced, which provides a strong guarantee for the production continuity of the enterprise. At the same time, when installing the pull rod 170, first use the threads at both ends of the pull rod 170 to connect its fine threads to the inside of the connecting plate 160 corresponding to the outer walls of the mounting plate 100 and the mounting plate 2 400 to ensure the initial connection stability, and then lock multiple fixing bolts 141 into the inside of the pull rod 170. These fixing bolts can not only significantly improve the overall fixing stability of the pull rod 170, but also cooperate with the support sleeve 120 to play a key supporting role for the threaded part, and can effectively disperse the stress borne by the thread, avoiding the occurrence of thread stripping and damage due to excessive stress concentration, greatly improving the reliability and durability of the pull rod 170 during long-term use, reducing the maintenance cost and failure risk of equipment, and laying a solid foundation for the safe and stable operation of the industrial pipeline system.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A split expansion joint, comprising a first mounting plate (100) and a second mounting plate (200), characterized in that: A corrugated sleeve 1 (300) and a corrugated sleeve 2 (400) are connected between the mounting plate 1 (100) and the mounting plate 2 (200). A limit clamping assembly is provided on the outer wall of one side of the mounting plate 1 (100). The limit clamping assembly includes a connecting frame (120). A connecting plate (150) is provided on the circumferential outer wall of the mounting plate 1 (100). The mounting plate 2 (200) has the same structure as the mounting plate 1 (100). A pull rod (170) is threadedly sleeved between the circumferential outer wall connecting plate (150) of the mounting plate 2 (200) and the circumferential outer wall connecting plate (150) of the mounting plate 1 (100).

2. A split expansion joint according to claim 1, characterized in that: The outer walls of the plurality of connecting frames (120) are rotatably connected to rotating threaded rods (130), and the circumferential outer walls of the rotating threaded rods (130) are sleeved with clamping limiting recessed blocks (140).

3. A split expansion joint according to claim 2, characterized in that: The outer walls of the plurality of connection plates (150) are also provided with support plates (160), the inner threads of the plurality of support plates (160) are sleeved with fixing bolts (161), and the outer walls of the plurality of support plates (160) are also welded with support sleeves (162).

4. A split expansion joint according to claim 3, characterized in that: The outer walls of the two ends of the plurality of pull rods (170) are provided with threads, and the outer walls of the plurality of pull rods (170) are also provided with fixing holes matching the fixing bolts (161).

5. A split expansion joint according to claim 4, characterized in that: The two ends of the corrugated sleeve (300) are respectively provided with a clamping seat (310), and the outer walls of the plurality of clamping seats (310) are provided with a clamping groove (320).

6. A split expansion joint according to claim 5, characterized in that: A plurality of limit blocks (330) are welded to the inner walls of the clamping grooves (320), and the second corrugated sleeve (400) has the same structure as the first corrugated sleeve (300).

7. A split expansion joint according to claim 6, characterized in that: The outer wall of the mounting plate 1 (100) is provided with an inner lining tube 1 (110), and the outer wall of the mounting plate 2 (200) is provided with an inner lining tube 2 (210). The diameter of the inner lining tube 2 (210) is slightly smaller than that of the inner lining tube 1 (110), and the inner lining tube 2 (210) is sleeved inside the inner lining tube 1 (110).

8. A method for using a split expansion joint, characterized in that: A split expansion joint comprising any one of claims 1 to 7.

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