Waveguide seal

Abstract

This utility model provides a corrugated pipe sealing joint, including a flexible sleeve that can be inserted into the corrugated pipe, an inner retaining ring that surrounds the outside of the corrugated pipe, an outer retaining ring that is fitted outside the inner retaining ring, and a connector. The flexible sleeve has a main body with a circular cross-section; the inner retaining ring is formed by splicing retaining blocks, with inner retaining ribs on the retaining blocks and internal threads on the upper part of the inner side of the retaining blocks; the outer retaining ring is located outside the inner retaining ring; the connector includes a sealing part, an external threaded part, and a connecting part. This solution, by setting the inner and outer retaining rings, inserts the flexible sleeve into the corrugated pipe, and then sets the connector, with the sealing part of the connector inserted into the flexible sleeve, and the external threaded part of the connector engaging with the internal thread of the retaining block, and by rotating the connector, the connector squeezes the flexible sleeve from the inside. This solution applies force from both the outer periphery and the inner wall of the corrugated pipe to clamp it, preventing even the thinnest corrugated pipe from being squeezed and deformed, effectively improving the reliability and effect of the seal.

Description

Technical Field

[0001] This utility model relates to the field of pipe fittings technology, specifically to a corrugated pipe sealing joint. Background Technology

[0002] Corrugated conduit is a protective sleeve made of polyethylene, nylon, or polypropylene, primarily used to prevent wires and cables from being scratched or cut in mechanical environments. Its applications span industries such as machinery, automation control, automotive manufacturing, subway systems, and electrical switchgear. Typically, corrugated conduit features a corrugated design on both its inner and outer walls, with a nominal outer diameter ranging from 7.5mm to 106mm, a wall thickness of approximately 1mm, and an operating temperature range of -40℃ to +125℃. It possesses characteristics such as good flexibility, torsion resistance, acid resistance, abrasion resistance, and UV resistance. When used with matching sealing joints, it can meet the sealing requirements of specialized fields such as machinery manufacturing and aerospace equipment.

[0003] A quick-release waterproof connector for corrugated pipes is disclosed in patent document CN2879488Y. The connector includes a connector body and a clamping member that can lock the corrugated pipe in place. A waterproof fixing assembly is provided between the connector body and the clamping member. This assembly consists of a soft waterproof seat and a ring-shaped fastener. The soft waterproof seat has a recessed support portion at its top for embedding the ring-shaped fastener, and its inner edge forms a constricted inclined surface. The grooved ring-shaped fastener has several spring-loaded clips on its inner edge that can engage the corrugated pipe. According to this structure, when the clamping member is locked relative to the connector body, it can push the ring-shaped fastener and the soft waterproof seat, causing the spring-loaded clips of the ring-shaped fastener to engage with the recessed portion of the corrugated pipe, generating a strong force to secure it to the pipe. Furthermore, the soft waterproof seat completely covers the surface of the corrugated pipe, and due to compression deformation, it can tighten and waterproof the corrugated pipe, thus achieving the purpose of quick locking, fixing, and waterproofing. This solution achieves both fixation and waterproofing by applying force to the outer periphery of the corrugated pipe, causing the soft waterproof seat to deform and cover the surface of the pipe. However, since the walls of corrugated pipes are typically thin, simply applying force from the outer periphery to compress the pipe may deform it, thus failing to provide a seal. Therefore, it is necessary to design a new structure to address the problems existing in the current technology. Summary of the Invention

[0004] The present invention aims to solve the technical problem that the existing wave tube joint may fail to seal due to the fact that the sealing is applied only from the outer periphery.

[0005] To solve the above-mentioned technical problems, this utility model provides a corrugated pipe sealing joint, including a flexible sleeve that can be inserted into the corrugated pipe, an inner retaining ring that surrounds the outside of the corrugated pipe, an outer retaining ring that is sleeved outside the inner retaining ring, and a connector. The flexible sleeve has a main body with a circular cross-section and an outwardly extending abutting part at the top of the main body. The inner retaining ring is composed of two or more retaining blocks spliced ​​together. The lower part of the inner side of the retaining block has one or more inner retaining ribs that can extend into the outer annular groove of the corrugated pipe, and the upper part of the inner side of the retaining block has an internal thread. The outer retaining ring is disposed outside the inner retaining ring through a connecting structure. The connector includes a sealing part that can be inserted into the flexible sleeve, an external threaded part that can mate with the internal thread, and a connecting part that can be connected to an external connector, arranged in sequence.

[0006] The above structure, by setting an inner and outer retaining ring on the outside of the corrugated tube, inserting a flexible sleeve inside the corrugated tube, and then setting a connector, with the sealing part of the connector inserted into the flexible sleeve, and the external thread of the connector engaging with the internal thread on the inside of the inner retaining ring, rotates the connector, and the connector squeezes the flexible sleeve from the inside, thereby squeezing the corrugated tube. Thus, the connector, flexible sleeve, corrugated tube, inner retaining ring, and outer retaining ring can be tightly combined to achieve a sealing effect. This solution applies force from both the outer circumference and the inner wall of the corrugated tube to clamp it, so even the thinnest corrugated tube will not be squeezed and deformed, effectively improving the reliability and effect of the seal. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0008] Figure 2 This is an exploded structural diagram of an embodiment of the present utility model;

[0009] Figure 3 for Figure 2 Enlarged view at point B in the middle;

[0010] Figure 4 This is a schematic diagram of the structure of the outer retaining ring in an embodiment of this utility model;

[0011] Figure 5 for Figure 1 Sectional view of plane AA;

[0012] Figure 6 for Figure 5 Enlarged view at point C;

[0013] Figure 7 This is a schematic diagram of the structure of the integrally molded connector in the embodiment of this utility model. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] like Figures 1 to 2As shown, a corrugated pipe sealing joint includes a flexible sleeve 1 that can be inserted into the corrugated pipe 100, an inner retaining ring 2 that surrounds the outside of the corrugated pipe 100, an outer retaining ring 3 that is sleeved on the outside of the inner retaining ring 2, and a connector 4.

[0016] The corrugated tube 100 has an outer annular groove 101 and an inner annular groove 102.

[0017] The flexible sleeve 1 has a main body 10 with a circular cross-section, and a stop 11 extending outward at the top of the main body 10. During installation, the stop 11 rests against the end of the corrugated tube 100.

[0018] The main body 10 of the flexible sleeve 1 has a taper, and the cross-sectional area of ​​the main body 10 gradually decreases from one end near the abutment 11 to the other end. One or more outer retaining ribs 12 are provided around the outer periphery of the main body 10, and the outer retaining ribs 12 extend into the inner annular groove 102. In this embodiment, there are three outer retaining ribs 12. Typically, the flexible sleeve 1 is made of silicone or rubber and is elastic, so when the flexible sleeve 1 is inserted into the corrugated tube 100, the outer retaining ribs 12 can undergo elastic deformation and extend into the inner annular groove 102.

[0019] The inner card ring 2 is composed of two or more card blocks spliced ​​together. In this embodiment, there are two card blocks, namely the first card block 21 and the second card block 22. A positioning device is provided between the first card block 21 and the second card block 22.

[0020] The positioning device includes one or more positioning pins 211 on the first locking block 21 and positioning holes 220 on the second locking block 22 corresponding to the positioning pins 211. In this embodiment, there are four positioning pins 211. The positioning pins 211 and the positioning holes are interference-fitted. Through the cooperation of the positioning pins 211 and the positioning holes, the first locking block 21 and the second locking block 22 can be easily joined together, facilitating subsequent assembly operations.

[0021] In another embodiment, the positioning device may be a magnet disposed between the first card block 21 and the second card block 22. The magnet is embedded in the first card block 21 and the second card block 22 respectively. During assembly, the first card block 21 and the second card block 22 can automatically attract each other together.

[0022] One or more inner locking ribs 23 that can extend into the outer ring groove 101 are provided on the lower part of the inner side of the first locking block 21 and the second locking block 22. In this embodiment, the number of inner locking ribs 23 is three.

[0023] An internal thread 24 is provided on the upper part of the inner side of the first locking block 21 and the second locking block 22.

[0024] like Figures 2 to 4 As shown, the outer retaining ring 3 is located outside the inner retaining ring 2 via a connecting structure.

[0025] In this embodiment, the connection structure is a snap-fit ​​structure, which includes a slot 221 axially formed on the outer surfaces of the first snap block 21 and the second snap block 22. A protrusion 222 for limiting the outer snap ring 3 is provided in the slot 221. A first guide slope 223 is provided on the side of the protrusion 222 facing the inner snap rib 23. A chamfer 224 is provided on the side of the slot 221 near the inner snap rib 23.

[0026] A blocking part 30 is provided at the bottom of the outer retaining ring 3 to block the inner retaining ring 2.

[0027] The snap-fit ​​structure also includes a protrusion 31 inside the outer retaining ring 3. The protrusion 31 extends from the abutment 30 to the top of the outer retaining ring 3. The protrusion 31 is in clearance fit with the retaining groove 221. A notch 32 for accommodating the protrusion 222 is provided on the protrusion 31. A second guide slope 33 is provided on the side of the protrusion 31 near the top.

[0028] When installing the inner retaining ring 2 and the outer retaining ring 3, first fasten the first retaining block 21 and the second retaining block 22 to the outside of the corrugated pipe 100, so that the inner retaining rib 23 is embedded in the outer ring groove 101. Then push the outer retaining ring 3 along the corrugated pipe 100 toward the inner retaining ring 2, so that the protrusion 31 faces the retaining groove 221, until the protrusion 222 is inserted into the notch 32. In this way, the outer retaining ring 3 can firmly hold the inner retaining ring 2. Due to the chamfer 224 and the second guide slope 33, the protrusion 31 can be smoothly inserted into the retaining groove 221.

[0029] As another implementation of the connection structure, the connection structure can also be a threaded connection structure. The threaded connection structure includes external threads provided on the first locking block 21 and the second locking block 22 and internal threads provided on the outer retaining ring 3. After the first locking block 21 and the second locking block 22 are engaged, the outer retaining ring 3 can be tightened onto the first locking block 21 and the second locking block 22 by the threads.

[0030] like Figure 2 As shown, the connector 4 includes a sealing part 41 that can be inserted into the flexible sleeve 1, an external thread part 42 that can mate with the internal thread 24, and a connecting part 43 that can be connected to an external connector, arranged in sequence.

[0031] In this embodiment, the sealing part 41 is also provided with a taper that mates with the main body 10. The sealing part 41 and the external thread part 42 are integrally injection molded from hard plastic, but they can also be machined from metal or cast and then machined. The connecting part 43 is a connector nut. A boss part 421 for abutting the connector nut is provided at the end of the external thread part 42 away from the sealing part 41. A surrounding groove 4210 is provided on the boss part 421, and a sealing ring 44 is provided in the groove 4210.

[0032] like Figure 7As shown, in another embodiment of the connector, the sealing part 41b, the external thread part 42b and the connecting part 43b of the connector 4b are integrally injection molded from rigid plastic. Of course, they can also be machined from metal or machined after casting. A sealing ring (not shown) is provided in the connecting part 43b, and the inner surface of the connecting part 43b has threads for connecting with external connectors.

[0033] like Figure 5 As shown, in order to improve the stability of fluid flow, one or more guide strips 45 are provided on the inner wall of the connector 4 along the axial direction. In the embodiment, there are four guide strips 45, which are evenly distributed on the inner wall of the connector 4.

[0034] This solution involves setting an inner retaining ring 2 and an outer retaining ring 3 on the outside of the corrugated tube 100, inserting a flexible sleeve 1 inside the corrugated tube 100, and then setting a connector 4. The sealing part 41 of the connector 4 is inserted into the flexible sleeve 1, and the external thread 42 of the connector 4 is engaged with the internal thread 24 on the inner side of the inner retaining ring 2. By rotating the connector 4, the connector 4 squeezes the flexible sleeve 1 from the inside, and the sealing part 41 expands the flexible sleeve 1 through the conical surface. Force is applied from the end face and inner wall of the corrugated tube 100 to squeeze the corrugated tube 100. Through the staggered compression of the corrugated tube 100 by the outer retaining rib 12 and the inner retaining rib 23, the connector 4, the flexible sleeve 1, the corrugated tube 100, the inner retaining ring 2 and the outer retaining ring 3 can be tightly combined to achieve a sealing effect. This solution applies force from the outer periphery and inner wall of the corrugated tube 100 to clamp the corrugated tube 100 at the same time, so even the thinnest corrugated tube 100 will not be squeezed and deformed, effectively improving the reliability and effect of the seal.

Claims

1. A corrugated pipe sealing joint, characterized in that: It includes a flexible sleeve that can be inserted into the corrugated tube, an inner retaining ring that surrounds the outside of the corrugated tube, an outer retaining ring that is fitted outside the inner retaining ring, and a connector. The flexible sleeve has a main body with a circular cross-section and an outwardly extending abutting part at the top of the main body. The inner retaining ring is composed of two or more retaining blocks spliced ​​together. There is one or more inner retaining ribs that can extend into the outer annular groove of the corrugated pipe at the lower part of the inner side of the retaining block, and there is an internal thread at the upper part of the inner side of the retaining block. The outer retaining ring is located outside the inner retaining ring via a connecting structure; The connector includes a sealing part that can be inserted into a flexible sleeve, an external thread part that can mate with an internal thread, and a connecting part that can be connected to an external connector, arranged in sequence.

2. The corrugated pipe sealing joint according to claim 1, characterized in that: One or more external retaining ribs are provided around the outer periphery of the main body of the flexible sleeve, and the external retaining ribs extend into the inner annular groove of the corrugated tube.

3. The corrugated pipe sealing joint according to claim 1, characterized in that: The number of card blocks is two, namely the first card block and the second card block, and a positioning device is provided between the first card block and the second card block.

4. The corrugated pipe sealing joint according to claim 3, characterized in that: The positioning device includes one or more positioning pins on the first card block and positioning holes on the second card block corresponding to the positioning pins.

5. The corrugated pipe sealing joint according to claim 3, characterized in that: The positioning device includes a magnet disposed between the first and second locking blocks.

6. The corrugated pipe sealing joint according to claim 1, characterized in that: The connection structure is a snap-fit ​​structure; the snap-fit ​​structure includes a slot axially formed on the outer surface of the snap block, a protrusion for limiting the outer snap ring is provided in the slot, and a first guide slope is provided on the side of the protrusion facing the inner snap rib; a chamfer is provided on the side of the slot near the inner snap rib. A blocking part for blocking the inner retaining ring is provided at the bottom of the outer retaining ring; The buckle structure also includes a protrusion inside the outer retaining ring. The protrusion extends from the abutment to the top of the outer retaining ring. The protrusion is fitted with the retaining groove with a gap. A notch for accommodating the protrusion is provided on the protrusion. A second guide slope is provided on the side of the protrusion near the top.

7. The corrugated pipe sealing joint according to claim 1, characterized in that: The main body of the flexible sleeve has a taper, and the sealing part of the connector also has a taper that matches the main body. The cross-sectional area of ​​the sealing part gradually decreases from one end near the external thread to the other end.

8. The corrugated pipe sealing joint according to claim 7, characterized in that: The sealing part, external threaded part and connecting part of the connector are integrally formed, and a sealing ring is provided in the connecting part. The inner surface of the connecting part has threads.

9. The corrugated pipe sealing joint according to claim 7, characterized in that: The sealing part and the external threaded part are integrally formed, and the connecting part is a connector nut. A boss for blocking the connector nut is provided at the end of the external threaded part away from the sealing part.

10. The corrugated pipe sealing joint according to claim 9, characterized in that: A surrounding groove is provided on the boss portion, and a sealing ring is provided in the groove.

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