Quick insertion type corrugated pipe connector

Abstract

The utility model discloses a quick-plug type corrugated pipe connector which comprises a corrugated pipe, a pressing sleeve and a locking nut, the corrugated pipe is sleeved with the locking nut, one end of the pressing sleeve is connected with the locking nut in a threaded mode, a clamping ring type sealing ring is arranged in the locking nut, an annular protrusion is arranged on the inner wall of the clamping ring type sealing ring, and the clamping ring type sealing ring is sleeved with the annular protrusion. The annular protrusion can be clamped in one wave trough of the corrugated pipe, the end, close to the locking nut, of the annular protrusion is provided with a guiding face used for guiding the corrugated pipe to be inserted, the end, close to the pressing sleeve, of the annular protrusion is provided with a disengagement preventing face, the corrugated pipe is prevented from being disengaged from the clamping ring type sealing ring, the guiding face is smooth, the corrugated pipe can be conveniently inserted, and the disengagement preventing face is steep. And the corrugated pipe is easy and convenient to install, time-saving and labor-saving, and excellent in drawing resistance, and the stability and reliability after installation are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of bellows connecting devices, in particular to a quick-insert bellows connecting joint. Background Art

[0002] The bellows connecting joint is usually applied to water pipes in current applications and is a component used to connect water pipes to ensure that the medium, that is, water, can flow smoothly. For example, a connecting joint with a multi-sealing structure disclosed in a Chinese patent application (publication number: CN220249217U) includes a bellows, a compression sleeve, and a lock nut. One end of the compression sleeve is threadedly and rotatably inserted into the interior of one end of the lock nut. One end of the bellows is inserted into the interior of the lock nut at the end far from the compression sleeve. A copper snap ring is clamped and fixed on the inner peripheral side of the lock nut. The inner peripheral side of the copper snap ring is clamped on the peripheral side of the bellows. A sealing ring is arranged at one end of the copper snap ring close to the compression sleeve. The inner peripheral side of the sealing ring abuts against the peripheral side of the bellows, and the outer peripheral side of the sealing ring abuts against the inner peripheral side of the compression sleeve. A plastic-coated layer is inserted into the interior of the lock nut at the end far from the compression sleeve. The plastic-coated layer sleeves on the peripheral side of the bellows. A chevron seal is arranged between the plastic-coated layer and the lock nut, which has the effect of improving the sealing performance among the compression sleeve, the lock nut, and the bellows.

[0003] However, for the above-mentioned connecting joint with a multi-sealing structure, when connecting the bellows, it is necessary to unscrew the whole joint to separate the compression sleeve from the lock nut, then insert the bellows into the lock nut. One end of the bellows inserted into the lock nut exposes the trough. Then, the copper snap ring is sleeved in and matched with the trough of the bellows, and then the compression sleeve and the lock nut are tightened. The installation is rather troublesome and requires a lot of time and energy. Therefore, it is necessary to improve it. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a quick-insert bellows connecting joint aiming at the defects and deficiencies of the prior art, which has a simple and reasonable structure, convenient operation, the bellows is easy to insert and not easy to pull out, the installation is simple, time-saving and labor-saving, has excellent tensile force, and ensures the stability and reliability after installation.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A quick-insert bellows connection joint according to the present utility model comprises a bellows, a compression sleeve and a lock nut. The lock nut is sleeved outside the bellows. One end of the compression sleeve is threadedly connected to the lock nut. A snap-ring seal ring is arranged inside the lock nut. An annular protrusion is arranged on the inner wall of the snap-ring seal ring. The annular protrusion can be clamped in one of the wave valleys of the bellows. A guiding surface for guiding the insertion of the bellows is arranged at one end of the annular protrusion close to the lock nut, and a retaining surface for preventing the bellows from disengaging from the snap-ring seal ring is arranged at one end of the annular protrusion close to the compression sleeve.

[0007] Further, the guiding surface is provided with a first R corner, and the arc edge of the first R corner is recessed towards the side close to the compression sleeve. The retaining surface is provided with a second R corner, and the arc edge of the second R corner is recessed towards the side close to the lock nut.

[0008] Further, the radius of the first R corner is greater than the radius of the second R corner.

[0009] Further, the radian of the arc edge of the second R corner is adapted to the radian of the wave crest of the bellows.

[0010] Further, a limiting step is arranged inside the lock nut, and the snap-ring seal ring is axially limited between the limiting step and the compression sleeve.

[0011] Further, a first conical surface is arranged at one end of the compression sleeve close to the lock nut, and the snap-ring seal ring is provided with a second conical surface which is matched with the first conical surface.

[0012] Further, a plastic-coated layer is inserted inside one end of the lock nut far from the compression sleeve, and the plastic-coated layer is sleeved on the periphery of the bellows.

[0013] Further, a chevron seal is abutted between the plastic-coated layer and the lock nut.

[0014] Further, an annular groove matched with the chevron seal is arranged inside the lock nut.

[0015] Further, the snap-ring seal ring is made of polytetrafluoroethylene material.

[0016] The beneficial effects of the present utility model are as follows: For a quick-insert bellows connection joint described in the present utility model, during installation, only need to loosen the compression sleeve and the locking nut, without completely unscrewing. Insert the bellows axially from the end of the locking nut away from the compression sleeve into the locking nut and the compression sleeve. When inserting, the guiding surface of the annular protrusion is relatively smooth, which can guide the insertion of the bellows, making the insertion of the bellows easier and smoother. The annular protrusion can be clamped in one of the trough grooves of the bellows. The anti-disengagement surface of the annular protrusion is relatively steep, so that after the bellows is inserted, it is not easy to be pulled out. The annular protrusion is in a form similar to an inverted buckle, making it difficult to be pulled out after the annular protrusion is clamped into the trough of the bellows. After the bellows is installed in place, then tighten the compression sleeve and the locking nut. The installation is convenient and simple, without complex steps, saving the time consumed by installation. The bellows has excellent anti-pull-out force and is difficult to be pulled out even under external force, ensuring the stability and reliability of the bellows after installation. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 is Figure 1 an enlarged structure diagram of part A in

[0019] Figure 3 is a schematic structure diagram of the snap ring type sealing ring;

[0020] Figure 4 is a schematic cross-sectional structure diagram between the bellows and the plastic coating layer.

[0021] Figures 1-4 In the figure: 1. Bellows; 11. Plastic coating layer; 2. Compression sleeve; 21. First conical surface; 3. Locking nut; 31. Limit step; 32. Ring groove; 4. Snap ring type sealing ring; 41. Annular protrusion; 411. Guiding surface; 4111. First R angle; 412. Anti-disengagement surface; 4122. Second R angle; 42. Second conical surface; 5. Mountain-shaped ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present utility model will be further described below with reference to the accompanying drawings.

[0023] Such as Figures 1-4A quick-insert bellows connection joint as shown, comprising a bellows 1, a compression sleeve 2 and a lock nut 3. The lock nut 3 is sleeved outside the bellows 1. One end of the compression sleeve 2 is inserted into the lock nut 3 and is threadedly connected to the lock nut 3 to ensure the stability and reliability of the connection. A snap-ring seal 4 is provided inside the lock nut 3. Preferably, in this embodiment, a limiting step 31 is provided inside the lock nut 3. When the compression sleeve 2 and the lock nut 3 are tightened, the snap-ring seal 4 is axially limited between the limiting step 31 and the compression sleeve 2, enhancing the sealing effect. A circular protrusion 41 is provided on the inner wall of the snap-ring seal 4. The circular protrusion 41 can be clamped in one of the wave valleys of the bellows 1, which can effectively seal the bellows 1. A guiding surface 411 for guiding the insertion of the bellows 1 is provided at one end of the circular protrusion 41 close to the lock nut 3. Preferably, in this embodiment, refer to Figures 2-3 , a first R corner 4111 is provided on the guiding surface 411, and the arc edge of the first R corner 4111 is recessed towards the side close to the compression sleeve 2, making the insertion of the bellows 1 easier and smoother. A retaining surface 412 is provided at one end of the circular protrusion 41 close to the compression sleeve 2. A second R corner 4122 is provided on the retaining surface 412, and the arc edge of the second R corner 4122 is recessed towards the side close to the lock nut 3. Preferably, in this embodiment, the radian of the arc edge of the second R corner 4122 is adapted to the radian of the wave crest of the bellows 1, so that the retaining surface 412 can fit with the wave crest of the bellows 1, preventing the bellows 1 from disengaging from the snap-ring seal 4 and making it difficult to pull out the bellows 1, further improving the stability of the connection.

[0024] Preferably, in this embodiment, the radius of the first R corner 4111 is greater than the radius of the second R corner 4122, making the guiding surface 411 relatively smooth and the retaining surface 412 relatively steep, ensuring that the bellows 1 is easy to insert but difficult to pull out.

[0025] When installing, it is only necessary to loosen the compression sleeve 2 and the locking nut 3, and it is not necessary to completely unscrew them. The bellows 1 is inserted axially from the end of the locking nut 3 away from the compression sleeve 2 into the locking nut 3 and the compression sleeve 2. When inserting, the guiding surface 411 of the annular protrusion 41 is relatively smooth and can guide the insertion of the bellows 1, making the insertion of the bellows 1 easier and smoother. The annular protrusion 41 can be stuck in one of the trough grooves of the bellows 1, and the anti-slip surface 412 of the annular protrusion 41 is steep, so that After the bellows 1 is inserted, it is not easy to pull out. The annular protrusion 41 is similar to the form of an inverted buckle, which makes it difficult to pull out after the annular protrusion 41 is stuck into the trough of the bellows 1. After the bellows 1 is installed in place, the clamping sleeve 2 and the locking nut 3 are tightened. The installation is convenient and simple, and no complicated steps are required, which saves installation time. The bellows 1 has excellent tensile strength performance and is difficult to be pulled out even under external force, ensuring the stability and reliability of the bellows 1 after installation.

[0026] The utility model discloses a quick-insert bellows connecting joint, which makes the connection of the bellows 1 faster and easier by adopting a quick-insert design, reduces the installation time, and the bellows 1 is easy to insert but not easy to pull out, thereby ensuring the stability and reliability of the connection.

[0027] Preferably, in this embodiment, the compression sleeve 2 is provided with a first conical surface 21 at one end close to the locking nut 3, and the snap-ring type sealing ring 4 is provided with a second conical surface 42 matching with the first conical surface 21. When the compression sleeve 2 and the locking nut 3 are tightened, the first conical surface 21 and the second conical surface 42 fit tightly together, thereby improving the sealing between the compression sleeve 2 and the snap-ring type sealing ring 4.

[0028] Preferably, in this embodiment, refer to Figure 4 A plastic coating layer 11 is inserted into the end of the locking nut 3 away from the compression sleeve 2. The plastic coating layer 11 is sleeved on the circumferential side of the corrugated tube 1, which can effectively prevent the corrugated tube 1 from being damaged when subjected to external force, thereby improving the stability and reliability of the entire product.

[0029] Preferably, in this embodiment, a mountain-shaped ring 5 is disposed between the plastic coating layer 11 and the locking nut 3 , and the mountain-shaped ring 5 can increase the sealing between the locking nut 3 and the corrugated tube 1 , thereby improving the stability among the compression sleeve 2 , the locking nut 3 and the corrugated tube 1 .

[0030] Preferably, in this embodiment, the locking nut 3 is provided with an annular groove 32 that cooperates with the mountain-shaped ring 5. When the mountain-shaped ring 5 is installed, the mountain-shaped ring 5 is clamped in the annular groove 32, so that the mountain-shaped ring 5 is not easy to fall out of the locking nut 3 during use, thereby improving the stability of the mountain-shaped ring 5.

[0031] Preferably, in this embodiment, the snap ring seal ring 4 is made of polytetrafluoroethylene material. Polytetrafluoroethylene material is a polymer material with excellent chemical stability and heat resistance. It has an extremely low coefficient of friction and excellent wear resistance characteristics. In addition, polytetrafluoroethylene material also has excellent electrical insulation performance and the ability to maintain stability at extreme temperatures. Therefore, by using polytetrafluoroethylene material to manufacture the snap ring seal ring 4, not only can its good sealing performance be ensured, but its service life can also be extended, and its performance can be maintained without being affected in various harsh environments.

[0032] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made according to the structure, characteristics, and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A quick-insert bellows connection joint, comprising a bellows (1), a compression sleeve (2) and a locking nut (3). The locking nut (3) is sleeved outside the bellows (1), and one end of the compression sleeve (2) is threadedly connected to the locking nut (3). It is characterized in that: A snap ring seal ring (4) is provided inside the lock nut (3). An annular protrusion (41) is provided on the inner wall of the snap ring seal ring (4). The annular protrusion (41) can be clamped in one of the wave valleys of the corrugated pipe (1). A guiding surface (411) for guiding the insertion of the corrugated pipe (1) is provided at one end of the annular protrusion (41) close to the lock nut (3), and a anti-disengagement surface (412) is provided at one end of the annular protrusion (41) close to the pressing sleeve (2) to prevent the corrugated pipe (1) from disengaging from the snap ring seal ring (4).

2. The quick-insert corrugated pipe connecting joint according to claim 1, characterized in that: A first R corner (4111) is provided on the guiding surface (411), and the arc edge of the first R corner (4111) is recessed toward the side close to the pressing sleeve (2). A second R corner (4122) is provided on the anti-disengagement surface (412), and the arc edge of the second R corner (4122) is recessed toward the side close to the lock nut (3).

3. The quick-insert corrugated pipe connection joint according to claim 2, characterized in that: The radius of the first R corner (4111) is greater than the radius of the second R corner (4122).

4. The quick-insert corrugated pipe connection joint according to claim 2, characterized in that: The radian of the arc edge of the second R corner (4122) is adapted to the radian of the wave crest of the corrugated pipe (1).

5. A quick-insert corrugated pipe connection joint according to claim 1, characterized in that: A limiting step (31) is provided inside the lock nut (3), and the snap ring seal ring (4) is axially limited between the limiting step (31) and the pressing sleeve (2).

6. The quick-insert corrugated pipe connection joint according to claim 1, characterized in that: A first conical surface (21) is provided at one end of the pressing sleeve (2) close to the lock nut (3), and the snap ring seal ring (4) is provided with a second conical surface (42) that cooperates with the first conical surface (21).

7. A quick-insert bellows connection joint according to claim 1, characterized in that: A plastic coating layer (11) is inserted into one end of the lock nut (3) far from the pressing sleeve (2), and the plastic coating layer (11) is sleeved on the periphery of the corrugated pipe (1).

8. A quick-insert corrugated pipe connection joint according to claim 7, characterized in that: A chevron seal ring (5) is provided in abutment between the plastic coating layer (11) and the lock nut (3).

9. The quick-insert corrugated pipe connection joint according to claim 8, characterized in that: A ring groove (32) that cooperates with the chevron seal ring (5) is provided inside the lock nut (3).

10. A quick-insert bellows connection joint according to claim 1, characterized in that: The snap ring seal ring (4) is made of polytetrafluoroethylene material.

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