Corrugated pipe joint

Abstract

The utility model discloses a corrugated pipe joint which is matched with a corrugated pipe, the corrugated pipe joint comprises a pressing sleeve and a sealing ring, at least part of the inner wall of the pressing sleeve is provided with a cylindrical surface section, the cylindrical surface section is arranged at the end of the corrugated pipe in a sleeved mode, the sealing ring is located between the cylindrical surface section and the corrugated pipe, and the sealing ring is embedded in a wave trough of the corrugated pipe. The sealing ring is axially limited in the wave trough, the sealing ring is matched with the outer wall of the wave trough in a sealing mode, the outer edge of the sealing ring protrudes out of the wave crest of the corrugated pipe, the wall face of the cylindrical face section is a smooth cylindrical face, and the outer edge of the sealing ring is matched with the wall face of the cylindrical face section in a sealing mode. And a good sealing effect can be realized by directly screwing down by hands, so that the installation becomes simple and convenient, the labor and the installation time are greatly saved, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of bellows, especially to a bellows joint. BACKGROUND

[0002] As a common connecting component, the structure of the bellows joint usually comprises a compression sleeve and a locking nut, specifically, one end of the bellows is inserted into the inner hole of the compression sleeve, and the outer wall of the compression sleeve is designed with threads, and the locking nut is sleeved outside the compression sleeve and connected with the compression sleeve through threads, in order to ensure the sealing performance of the connecting part, the bellows joint is usually equipped with a sealing element, in the prior art, there are two main installation methods of the sealing element, the first method is to directly place the sealing element on the flattened end face of the bellows, in the specific operation, the sealing element is placed on the end face of the bellows stably, and then the locking nut is tightened to compress the sealing element to fill the gap and achieve the sealing effect, the second method is to sleeve the sealing element outside the bellows, the sealing element is designed with a first inclined surface, and the inner wall of the locking nut is correspondingly provided with a second inclined surface matched with the first inclined surface, when the locking nut is tightened, the sealing element is compressed by the inclined surface to fill the gap and realize effective sealing.

[0003] However, both of the two sealing methods have a common potential condition, that is, the locking nut must be tightened to a sufficient degree, if the tightening degree is insufficient, the sealing element cannot be fully shrunk, which may lead to poor sealing effect and even leakage problem. However, there are some problems that need attention in the tightening process, first, although the sealing element is usually made of rubber material with certain flexibility and can deform under stress, its compression ratio is limited, generally, the compression ratio of the common sealing element ranges from 10% to 30%, in this range, the sealing element can fully deform to fill the gap under pressure, and will not be damaged or lose sealing performance due to excessive compression, if the compression ratio exceeds this range, the sealing element may be damaged, even completely lose the sealing function. Secondly, in the process of tightening the locking nut, in order to achieve sufficient tightening degree, various tools are usually used, which is more troublesome, and if the force is not controlled when using the tools, the compression ratio of the sealing element may be damaged, which exceeds the reasonable range. In this way, not only the expected sealing effect cannot be achieved, but also the sealing element may be damaged due to excessive compression, which affects the use performance of the whole bellows joint, therefore, it is necessary to improve. UTILITY MODEL CONTENTS

[0004] The utility model discloses a corrugated pipe joint, simple and reasonable structure, convenient operation, and the sealing ring is arranged in the wave trough of the corrugated pipe, the sealing ring is sealed with the outer wall of the wave trough, the outer edge of the sealing ring is protruded from the wave crest of the corrugated pipe and sealed with the inner wall of the compression sleeve, without using tools, directly using hand to tighten can realize good sealing effect, simple installation, saves manual and installation time, improves work efficiency.

[0005] To realize above-mentioned purpose, the utility model adopts following technical scheme:

[0006] The corrugated pipe joint is suitable for the corrugated pipe, and the corrugated pipe joint comprises a compression sleeve and a sealing ring.

[0007] Further, the sealing ring is arranged at least one, and when the sealing ring is arranged two and more, each sealing ring is arranged in sequence along the axial direction of the corrugated pipe.

[0008] Further, the utility model further comprises a locking nut, the locking nut is arranged in the outside of the compression sleeve, and the locking nut is connected with the compression sleeve in screw thread.

[0009] Further, the outside of the corrugated pipe is arranged with a limit snap ring, and the limit snap ring is arranged between the compression sleeve and the locking nut to limit the axial direction of the corrugated pipe.

[0010] Further, the limit snap ring is arranged in the outside of the corrugated pipe, and the inner wall of the limit snap ring is provided with a semicircular groove matched with the wave crest.

[0011] Further, the outside of the corrugated pipe is coated with a plastic coating layer, and the end of the corrugated pipe is exposed outside the plastic coating layer, the inner wall of the plastic coating layer is tightly attached to the outer wall of the corrugated pipe, and the locking nut is provided with a gasket.

[0012] Further, the end of the locking nut away from the compression sleeve is provided with a mounting groove, and the mounting groove is provided with a gasket.

[0013] Further, the outer diameter of the wave trough is slightly larger than the inner diameter of the sealing ring.

[0014] Further, the sealing ring is an O-shaped ring.

[0015] The utility model discloses a beneficial effect for: the utility model discloses a corrugated pipe joint, at least part of the compression sleeve inner wall is provided with the cylindrical section, and the cylindrical section is sleeved in the end of corrugated pipe, and the sealing ring is located between the cylindrical section and corrugated pipe, and the sealing ring is embedded in the wave trough of corrugated pipe, and the sealing ring is axially limited in the wave trough, and the outer diameter of the wave trough is slightly larger than the inner diameter of the sealing ring, and the sealing ring and the outer wall of the wave trough are sealedly cooperated, and this design makes the sealing ring produce precompression when installing, ensures that the sealing ring and the wave trough outer wall are closely combined, prevents leakage, and also can effectively avoid the displacement or falling of the sealing ring in the use process, and the outer edge of the sealing ring projects from the wave crest of corrugated pipe, and the compression sleeve is provided with the cylindrical section matched with corrugated pipe, and the inner wall of the cylindrical section is smooth cylindrical surface, and the outer edge of the sealing ring and the wall surface of the cylindrical section are sealedly cooperated, and the smooth cylindrical surface can ensure that the sealing ring and the wall surface of the cylindrical section are closely combined, prevent leakage and enhance sealing performance, in the installation process, the conventional corrugated pipe joint needs to be tightened through the tool, so that the sealing performance is ensured by compressing the sealing ring, and the utility model does not need to use wrench and the like, and directly tightens with hand, so good sealing effect can be realized, makes the installation become simple and convenient, this not only greatly saves the labor cost required for installation, but also significantly shortens the installation time, and improves work efficiency.

[0016] In the embodiment, the number of sealing rings is 3, which are sequentially the first sealing ring, the second sealing ring and the third sealing ring from front to back, and can play the role of three seals. The first sealing ring plays the role of blocking water flow and plays a decisive sealing effect. The second sealing ring plays the role of sealing in time to prevent leakage in the case of leakage of the first sealing ring. The third sealing ring plays the role of isolating air and can effectively prevent the first sealing ring and the second sealing ring from oxidizing due to contact with air, thereby significantly prolonging the service life thereof. In addition, the third sealing ring can play the role of sealing to provide the last line of defense in the case of leakage of both the first sealing ring and the second sealing ring. It should be noted that in other embodiments, the number of sealing rings can be adjusted according to actual needs. For example, the number of sealing rings can be only one, or two, four, or even more, to adapt to the diversified needs of different application scenarios and sealing requirements. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a cross-sectional structure schematic view of the utility model;

[0018] Figure 2 is Figure 1 an enlarged structure schematic view of A in the figure.

[0019] Figures 1-2Middle: 1, compression sleeve; 11, cylindrical section; 2, corrugated tube; 3, sealing ring; 4, locking nut; 41, limiting step; 42, mounting groove; 421, gable ring; 5, limiting snap ring; 51, semicircular groove; 6, plastic layer. DETAILED DESCRIPTION

[0020] The utility model will be further described in connection with the drawings.

[0021] As Figures 1-2 shown in a corrugated pipe joint, which is adapted to corrugated pipe 2, the corrugated pipe joint includes compression sleeve 1 and sealing ring 3, at least part of the inner wall of compression sleeve 1 is provided with cylindrical section 11, cylindrical section 11 is set in the end of corrugated pipe 2, sealing ring 3 is located between cylindrical section 11 and corrugated pipe 2, sealing ring 3 is embedded in the valley of corrugated pipe 2, and sealing ring 3 is axially limited in the valley, preferably, in the embodiment, the outer diameter of the valley is slightly larger than the inner diameter of sealing ring 3, sealing ring 3 and the outer wall of the valley are sealingly matched, this design makes sealing ring 3 produce precompression when installing, ensures that sealing ring 3 is closely attached to the outer wall of the valley, prevents leakage, and also effectively avoids displacement or falling of sealing ring 3 during use, the outer edge of sealing ring 3 protrudes from the crest of corrugated pipe 2, the wall surface of cylindrical section 11 is smooth cylindrical surface, the outer edge of sealing ring 3 and the wall surface of cylindrical section 11 are sealingly matched, the smooth cylindrical surface can ensure that sealing ring 3 is closely attached to the wall surface of cylindrical section 11, prevents leakage and enhances sealing performance, in the installation process, the conventional corrugated pipe joint needs to be tightened by tools, so that sealing ring 3 is compressed to ensure sealing performance, the utility model does not need to use wrench and other tools, and good sealing effect can be realized by directly tightening with hands, so that installation becomes simple and convenient, which not only greatly saves the labor cost required for installation, but also significantly shortens the installation time and improves work efficiency.

[0022] Preferably, the sealing ring 3 is provided with at least one, and when the sealing ring 3 is provided with two or more, each sealing ring 3 is arranged in sequence along the axial direction of the corrugated pipe 2. Specifically, in the embodiment, referring to Figure 2, the number of the sealing rings 3 is three, which are sequentially the first sealing ring, the second sealing ring and the third sealing ring from front to back, wherein the third sealing ring is arranged at the position close to the limiting snap ring 5, constituting the last sealing barrier, the first sealing ring and the second sealing ring are both EPDM O-shaped sealing rings, and the third sealing ring is a neoprene O-shaped sealing ring. By arranging three sealing rings 3, the effect of three seals can be achieved. The function of the first sealing ring is to block the water flow and achieve a decisive sealing effect. The function of the second sealing ring is to seal in time in case of leakage of the first sealing ring, preventing leakage. The function of the third sealing ring is to isolate air, which can effectively prevent the first sealing ring and the second sealing ring from oxidizing due to contact with air, thereby significantly prolonging the service life thereof. In addition, in case of leakage of both the first sealing ring and the second sealing ring, the third sealing ring can achieve the effect of sealing, providing the last line of defense. It should be noted that in other embodiments, the number of the sealing rings 3 can be adjusted according to actual needs, for example, the number of the sealing rings 3 can be only one, or two, four, or even more, to adapt to the diversified needs of different application scenarios and sealing requirements.

[0023] Preferably, the present embodiment further comprises a locking nut 4, which is sleeved outside the compression sleeve 1, and the locking nut 4 is threadedly connected with the compression sleeve 1. Preferably, in the present embodiment, referring to Figure 2 , the outside of the bellows 2 is sleeved with a limiting snap ring 5, which is arranged between the compression sleeve 1 and the locking nut 4 to axially limit the bellows 2. When the locking nut 4 is tightened, the locking nut 4 is limited by the limiting snap ring 5, so that the compression sleeve 1 moves inward, ensuring that the bellows 2 smoothly enters the compression sleeve 1, making the installation more labor-saving. The locking nut 4 is provided with a limiting step 41 which limits the limiting snap ring 5, and the limiting snap ring 5 limits the limiting step 41, which can play a role in resisting pulling out to prevent the bellows 2 from being pulled out under stress, ensuring stable connection.

[0024] Preferably, in the present embodiment, referring to Figure 2 , the limiting snap ring 5 is sleeved outside the bellows 2, and the inner wall of the limiting snap ring 5 is provided with a semicircular groove 51 which matches the wave crest. The arrangement of such semicircular groove 51 enables the limiting snap ring 5 to better fit the shape of the wave crest of the bellows 2 and is not easy to come off.

[0025] Preferably, in the present embodiment, referring to Figure 1The corrugated pipe 2 is coated with a plastic layer 6 outside, which can provide additional protection and improve service life. The end of the corrugated pipe 2 is exposed outside the plastic layer 6, which is convenient for installation. The exposed end of the corrugated pipe 2 is sleeved with the limiting snap ring 5, and the exposed trough is provided with the sealing ring 3. The sealing ring 3 is sealingly matched with the compression sleeve 1. The inner wall of the plastic layer 6 is tightly attached to the outer wall of the corrugated pipe 2, which improves the sealing effect. The locking nut 4 is provided with the gable ring 421 inside. The gable ring 421 is sealingly matched with the outer wall of the plastic layer 6, which further ensures the sealing effect of the connecting part and improves the sealing performance.

[0026] Preferably, in the embodiment, referring to Figure 1 The locking nut 4 is provided with the mounting groove 42 at one end away from the compression sleeve 1. The gable ring 421 is arranged in the mounting groove 42. The mounting groove 42 facilitates the installation of the gable ring 421 and effectively avoids the displacement of the gable ring 421 during use.

[0027] The above is only a preferred embodiment of the present application, so equivalent changes or modifications made according to the structure, features and principles of the present application patent application range are included in the present application patent application range.

Claims

1. A bellows joint, which is adapted to a bellows (2), characterized in that: The bellows joint comprises a compression sleeve (1) and a sealing ring (3), at least part of the inner wall of the compression sleeve (1) is provided with a cylindrical section (11), the cylindrical section (11) is sleeved on the end of the bellows (2), the sealing ring (3) is located between the cylindrical section (11) and the bellows (2), the sealing ring (3) is embedded in the valley of the bellows (2), and the sealing ring (3) is axially limited in the valley, the sealing ring (3) is in sealing cooperation with the outer wall of the valley, the outer edge of the sealing ring (3) protrudes from the peak of the bellows (2), the wall surface of the cylindrical section (11) is a smooth cylindrical surface, and the outer edge of the sealing ring (3) is in sealing cooperation with the wall surface of the cylindrical section (11).

2. A bellows joint according to claim 1, characterised in that: The sealing ring (3) is provided with at least one, and when the sealing ring (3) is provided with two or more, each sealing ring (3) is arranged in sequence along the axial direction of the bellows (2).

3. A bellows joint according to claim 1, characterized in that: Further comprising a locking nut (4), the locking nut (4) is sleeved outside the compression sleeve (1), and the locking nut (4) is in threaded connection with the compression sleeve (1).

4. A bellows joint according to claim 3, characterised in that: The outer part of the bellows (2) is sleeved with a limiting snap ring (5), the limiting snap ring (5) is abutted between the compression sleeve (1) and the locking nut (4) to axially limit the bellows (2).

5. A bellows joint according to claim 4, characterised in that: The inner wall of the limiting snap ring (5) is provided with a semicircular groove (51) matched with the peak.

6. A bellows joint according to claim 3, characterised in that: The outer part of the bellows (2) is covered with a plastic coating layer (6), the end of the bellows (2) is exposed outside the plastic coating layer (6), the inner wall of the plastic coating layer (6) is tightly attached to the outer wall of the bellows (2), and the locking nut (4) is provided with a mountain-shaped ring (421) in the inside.

7. A bellows joint according to claim 6, characterised in that: The end of the locking nut (4) away from the compression sleeve (1) is provided with a mounting groove (42), and the mounting groove (42) is provided with a mountain-shaped ring (421).

8. A bellows joint according to claim 1, characterized in that: The outer diameter of the valley is slightly larger than the inner diameter of the sealing ring (3).

9. A bellows joint according to claim 1, characterized in that: The sealing ring (3) is an O-shaped ring.

Images