Flexible clamping ring type limiting expansion piece

Abstract

The utility model discloses a flexible snap ring type limit expansion piece which comprises an outer pipe, an inner pipe, a snap ring, a sealing ring, a pressing flange, a bolt and a tightening nut, the inner pipe is installed in the outer pipe in a sliding mode, the snap ring is detachably installed at the feeding end of the inner pipe, a limit boss matched with the snap ring is arranged in the outer pipe, the inner wall of the limit boss is in contact with the outer wall of the inner pipe, and the outer wall of the inner pipe is in contact with the sealing ring. The sealing ring is filled between the outer pipe and the inner pipe, at least two bolts are installed on the tail portion of the outer pipe, the pressing flanges are installed on the bolts in a sliding mode, the tightening nuts are installed on the bolts through thread structures, and the sealing ring abuts against the limiting boss through the pressing flanges. The connector is mainly composed of the outer pipe and the inner pipe which are integrally formed, and is simple in structure and convenient to assemble; the limiting structure is positioned inside, is not interfered by an external complex environment, and is stable and reliable; the limiting structure is achieved through the limiting boss and the clamping ring and is not limited by the telescopic stroke, the parallelism error of the inner pipe and the outer pipe is not considered during engineering installation, certain flexible compensation is achieved, and use is convenient.

Description

Technical Field

[0001] This utility model relates to the field of pipe connector technology, and in particular to a flexible snap ring type limiting expansion joint. Background Technology

[0002] Steel expansion joints used for pipeline connections generally have an axial anti-pull-out structure. This structure is crucial for ensuring the safe operation of the project and is also a point where safety hazards are prone to occur.

[0003] Existing anti-detachment structures use large-diameter, long bolts or tie rods to hold the anti-detachment disc welded to the outer pipe, thus preventing pull-out. For example, Chinese utility model patent CN216896284U, entitled "A Thin-Walled Stainless Steel Water Pipe Expansion Joint," requires extremely long bolts depending on the expansion stroke. Furthermore, the parallelism of the inner and outer pipes and the bolts must be consistent, making it inconvenient to use. Moreover, because of this, the anti-detachment structure and the resulting connector have excessively high rigidity, causing stress concentration at both pipe ends when there are large installation errors. In addition, the anti-detachment structure is susceptible to corrosion from the external environment, leading to significant damage and affecting its safety and reliability. Utility Model Content

[0004] The purpose of this utility model is to provide a flexible snap ring type limiting expansion joint to solve the problems of inconvenience and excessive rigidity of existing pipe expansion connectors.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A flexible snap-ring type limiting expansion joint includes an outer tube, an inner tube, a snap ring, a sealing ring, a flange, bolts, and an adjusting nut. The inner tube is slidably installed inside the outer tube. The snap ring is detachably installed at the feed end of the inner tube. A limiting boss adapted to the snap ring is provided inside the outer tube. The inner wall of the limiting boss contacts the outer wall of the inner tube. The sealing ring fills the space between the outer tube and the inner tube. At least two bolts are installed at the tail of the outer tube. The flange is slidably installed on the bolts. The adjusting nut is installed on the bolts via a threaded structure. The flange abuts the sealing ring against the limiting boss.

[0007] A further technical solution is that the outer tube is provided with an expanded neck that is adapted to the retaining ring.

[0008] A further technical solution is that the feed end of the inner tube is provided with a groove that matches the retaining ring.

[0009] A further technical solution is that a through hole is provided at the bottom of the groove.

[0010] A further technical solution is that the sealing ring is an 8-shaped rubber ring.

[0011] A further technical solution is that the sealing ring is a lip self-tightening sealing ring.

[0012] A further technical solution is that the feed end of the inner tube is chamfered.

[0013] A further technical solution is that flanges are provided at both the inlet end of the outer tube and the outlet end of the inner tube.

[0014] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0015] This utility model proposes a flexible snap ring type limiting expansion joint. The connector is mainly composed of an integrally formed outer tube and an inner tube, which has a simple structure, is easy to assemble, and requires little welding. Moreover, its limiting structure is located inside, and is not affected by the complex external environment, ensuring its stability and reliability. Its limiting structure is realized by limiting bosses and snap rings, and is basically not limited by the expansion stroke. Furthermore, during engineering installation, the parallelism error between the inner and outer tubes is not considered, which provides a certain degree of flexible compensation and is convenient to use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a flexible snap ring type limiting expansion joint of this utility model.

[0017] Figure 2 This utility model Figure 1 A schematic diagram of the structure of the inner and outer tubes.

[0018] Figure 3 This utility model Figure 1 A schematic diagram of the inner tube.

[0019] Figure 4 This utility model Figure 1 A schematic diagram of the structure of the middle sealing ring.

[0020] Reference numerals in the attached diagram: 1. Outer tube; 2. Inner tube; 3. Snap ring; 4. Sealing ring; 5. Flange; 6. Bolt; 7. Adjusting nut; 8. Limiting boss; 9. Groove; 10. Flange. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0027] This implementation example Figure 1 , Figure 2 and Figure 3As shown, a flexible snap ring type limiting expansion joint includes an outer tube 1, an inner tube 2, a snap ring 3, a sealing ring 4, a flange 5, bolts 6, and an adjusting nut 7. The inner tube 2 is slidably installed inside the outer tube 1. The snap ring 3 is detachably installed at the feed end of the inner tube 2. The outer tube 1 is provided with a limiting boss 8 that matches the snap ring 3. The inner wall of the limiting boss 8 is in contact with the outer wall of the inner tube 2. The sealing ring 4 is filled between the outer tube 1 and the inner tube 2. At least two bolts 6 are installed at the tail of the outer tube 1. The flange 5 is slidably installed on the bolts 6. The adjusting nut 7 is installed on the bolts 6 through a threaded structure. The flange 5 abuts the sealing ring 4 against the limiting boss 8.

[0028] First, the inner tube 2 is slidably installed inside the outer tube 1. Then, the retaining ring 3 is installed at the end of the inner tube 2 inside the outer tube 1 (inner end / feed end). Next, the sealing ring 4 is filled between the outer tube 1 and the inner tube 2. The position of the adjusting nut 7 on the bolt 6 is used to adjust the flange 5, which compresses the sealing ring 4 to form a seal. During construction, the feed end of the outer tube 1 and the discharge end of the inner tube 2 are connected to the pipeline in the pipeline. The limiting boss 8 and the retaining ring 3 form an anti-pull-out effect for the outer tube 1 and the inner tube 2. The outer tube 1 and the inner tube 2 are integrally formed, and there is no limiting structure (anti-pull-out disc) in the inner and outer parts of the tube. The amount of welding is small, and the structure is simple and flexible. The overall weight is light. Because high parallelism is not required, and the flexible sealing ring 4 provides a flexible compensation effect during connection.

[0029] The structure that prevents detachment is located internally, unaffected by complex external environments, such as being less prone to rust, resulting in higher safety and reliability and extended service life.

[0030] Preferably, the outer tube 1 is provided with an expanded neck that is adapted to the retaining ring 3.

[0031] The expanded neck serves two purposes: first, to avoid obstructing the movement of the retaining ring 3 within its stroke; and second, to facilitate the easy installation and removal of the retaining ring 3 within this expanded diameter space.

[0032] Preferably, the feed end of the inner tube 2 is provided with a groove 9 that is compatible with the retaining ring 3.

[0033] The groove 9 facilitates the insertion and positioning of the retaining ring 3.

[0034] Preferably, a through hole is provided at the bottom of the groove 9.

[0035] The through hole allows for easy removal by using a tool (pry bar) to push out the retaining ring 3.

[0036] The retaining ring 3 is a highly elastic steel ring, which is convenient for repeated disassembly and reassembly for multiple uses.

[0037] Preferably, the sealing ring 4 is an 8-shaped rubber ring.

[0038] The figure-eight shaped rubber ring provides a double seal, ensuring a good seal.

[0039] Preferably, the sealing ring 4 is a lip self-tightening sealing ring.

[0040] The self-tightening lip seal can prevent leakage at the lip opening, further improving the sealing effect.

[0041] Preferably, the feed end of the inner tube 2 is provided with a chamfer.

[0042] This facilitates the installation of the retaining ring 3 on the inner tube 2.

[0043] Preferably, flanges 10 are provided at the inlet end of the outer tube 1 and the outlet end of the inner tube 2.

[0044] Flange 10 is used to connect the inlet end of outer pipe 1 and the outlet end of inner pipe 2 to the pipeline on the official website.

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flexible snap ring type position limiter expander, characterized by: The utility model provides a sealing device for the feeding pipe of the extruder, which comprises an outer tube (1), an inner tube (2), a snap ring (3), a sealing ring (4), a pressure bar (5), a bolt (6) and a tightening nut (7), the inner tube (2) is slidably installed in the outer tube (1), the snap ring (3) is detachably installed at the feeding end of the inner tube (2), the outer tube (1) is internally provided with a limiting boss (8) matched with the snap ring (3), the inner wall of the limiting boss (8) is in contact with the outer wall of the inner tube (2), the sealing ring (4) is filled between the outer tube (1) and the inner tube (2), at least two bolts (6) are installed at the tail of the outer tube (1), the pressure bar (5) is slidably installed on the bolt (6), the tightening nut (7) is installed on the bolt (6) through a threaded structure, and the pressure bar (5) abuts tightly the sealing ring (4) and the limiting boss (8).

2. The flexible snap ring type position limiter expander according to claim 1, wherein: The outer tube (1) is provided with a neck expansion part matched with the snap ring (3).

3. The flexible snap ring type position limiter expander according to claim 1, wherein: The feeding end of the inner tube (2) is provided with a groove (9) matched with the snap ring (3).

4. The flexible snap ring type expansion limiter according to claim 3, characterized in that: The through hole is arranged on the normal bottom of the groove (9).

5. The flexible snap ring type expansion limiter according to claim 1, characterized in that: The sealing ring (4) is an 8-shaped rubber ring.

6. The flexible snap-ring type expansion limiter according to any one of claims 1 or 4, characterized in that: The sealing ring (4) is a lip self-tightening type sealing ring.

7. The flexible snap ring type expansion limiter according to claim 1, wherein: The feeding end of the inner tube (2) is provided with a chamfer.

8. The flexible snap ring type expansion limiter according to claim 1, characterized in that: The feeding end of the outer tube (1) and the discharging end of the inner tube (2) are both provided with flanges (10).

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