Plug-in type clamping ring and sleeve for connecting quick-plug type corrugated pipe

Abstract

The utility model discloses a plug-in snap ring and a quick plug-in sleeve for corrugated pipe connection, which comprise a snap ring body, the snap ring body is made of metal materials, the first end of the snap ring body is an insertion end for a corrugated pipe to be inserted, and the second end of the snap ring body is an anti-disengagement end matched with the corrugated pipe in an anti-disengagement manner; a plurality of slits are formed in the circumferential wall of the clamping ring body in the circumferential direction, the slits extend from the second end of the clamping ring body to the first end of the clamping ring body, and one slit penetrates through the first end of the clamping ring body, so that the clamping ring body forms a split ring with an axial opening. The snap ring body made of the metal material effectively avoids the problem of connection failure caused by plastic fragmentation due to aging and other reasons of the plastic-copper snap ring. Through the arrangement of the slit and the opening, the snap ring body has expansibility, and when the corrugated pipe is inserted into the snap ring body, the snap ring body crosses one wave crest and then is clamped at the wave trough, so that the snap ring body sequentially passes through the three wave crests and then is clamped at the third wave trough, and the corrugated pipe is positioned and installed.

Description

Technical Field

[0001] The utility model relates to the technical field of bellows joints, and particularly relates to a plug-in snap ring and a sleeve for quick-insert bellows connection. Background Art

[0002] The stainless steel bellows has the characteristics of strong corrosion resistance, anti-settlement, anti-rat and insect bite, non-blocking pipe, etc. These characteristics make the stainless steel bellows widely used in gas pipes (such as gas pipeline connections) and water pipes. The connection at the bellows joint directly affects the sealing performance of the entire bellows. Therefore, the design of the joint part is particularly important. When connecting, it is required that both the sealing performance and the firmness of the joint are good. When connecting the bellows and the joint, generally, a snap ring is used for positioning to connect the bellows and the joint. For example, a plastic copper snap ring, whose main principle is the combination of plastic and copper cards. However, the plastic may age and crack or harden and break in a low-temperature environment, resulting in air leakage at the joint.

[0003] In order to avoid the disadvantages of the above-mentioned plastic copper snap ring, some joints in the prior art also use metal snap rings. For example, a gas pipe joint disclosed in a Chinese utility model patent (publication number: CN212745474U) includes a bellows, an inner joint and an outer joint. The inner end of the inner joint is for the end of the bellows to penetrate, and the outer end of the inner joint is threadedly connected to the outer joint. A sealing structure is provided between the inner joint and the bellows. A leakage detection hole radially penetrates through the middle of the outer joint. An annular gasket is provided between the inner joint and the bellows. The inner wall of the gasket abuts against the outer wall of the bellows, and the outer wall of the gasket abuts against the inner wall of the inner joint. The inner wall of the outer joint has a radially inwardly protruding shoulder for the outer end of the gasket to abut against. The leakage detection hole communicates with the cavity between the gasket and the outer joint. A snap ring that supports the inner end of the gasket is clamped on the bellows. The inner wall of the inner joint has a radially inwardly protruding shoulder that supports the inner end of the snap ring. Its connection stability is good, the sealing performance is good, and the working stability is good.

[0004] However, for the gas pipe joint disclosed in the above prior art, during assembly, a caliper is required to tighten the snap ring and press the contracted snap ring into the inner joint. Then, a gasket is put on, and then the outer joint is tightened. The above operation method is not only cumbersome and time-consuming. Moreover, due to the different construction and installation site environments, there is often a phenomenon that the joint fittings fall off during the assembly of the joint, which brings inconvenience to the installation.

[0005] Therefore, it is necessary to improve the prior art. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a plug-in snap ring and a sleeve for quick-insert bellows connection in view of the defects and deficiencies of the prior art. Its installation is simple and convenient. There is no need to disassemble the sleeve. The bellows can be directly inserted into the sleeve, and the installation can be completed by tightening the compression sleeve.

[0007] To achieve the above object, the utility model adopts the following technical solutions:

[0008] An insertion type snap ring, comprising a snap ring body, the snap ring body is made of a metal material, a first end of the snap ring body is an insertion end for inserting a corrugated pipe, and a second end of the snap ring body is a stop end for anti-disengagement cooperation with the corrugated pipe; a plurality of slits are formed in the circumferential direction of the circumferential wall of the snap ring body, the slits extend from the second end of the snap ring body to its first end, and one of the slits penetrates through the first end of the snap ring body, so that the snap ring body is formed into an open ring with an axial opening.

[0009] Further, a convex is provided on the inner circumferential wall of the second end and extends towards the axis of the snap ring body.

[0010] Further, a first arc chamfer is formed on the end face of the convex close to the first end of the snap ring body.

[0011] Further, the slits are uniformly distributed along the circumferential wall of the snap ring body.

[0012] Further, the snap ring body is made of copper material.

[0013] Further, the wall thickness of the second end of the snap ring body is greater than the wall thickness of its first end.

[0014] A quick-insert type sleeve for corrugated pipe connection, comprising a corrugated pipe, a compression sleeve, a sealing sleeve and a locking nut, and further comprising the above-mentioned insertion type snap ring, the compression sleeve, the insertion type snap ring, the sealing sleeve and the locking nut are sequentially sleeved on the outside of the corrugated pipe from back to front, the compression sleeve is threadedly connected with the locking nut, and the insertion type snap ring and the sealing sleeve are axially limited between the compression sleeve and the locking nut.

[0015] Further, a first inclined surface is provided on the outer circumferential wall of the second end of the snap ring body, and a second inclined surface adapted to the first inclined surface is provided at the front end of the compression sleeve.

[0016] Further, a coating layer is provided on the outer circumference of the corrugated pipe, a sealing ring is provided between the compression sleeve and the coating layer, and an installation groove for installing the sealing ring is provided on the inner wall of the compression sleeve.

[0017] Further, a leakage detection hole penetrating radially is provided on the compression sleeve.

[0018] After adopting the above structure, the beneficial effects of the utility model are as follows:

[0019] (1) The insertable clamp described in the utility model comprises a clamp body, the clamp body is made of metal material, the first end of the clamp body is an insertion end for inserting a bellows, and the second end of the clamp body is a stop end for locking the bellows; the peripheral wall of the clamp body is provided with a plurality of slits along the circumferential direction, the slits extend from the second end of the clamp body to the first end thereof, and one of the slits penetrates the first end of the clamp body, so that the clamp body is formed into an open ring with an axial opening. The inner peripheral wall of the second end is provided with a protrusion extending toward the axis of the clamp body. The end surface of the protrusion close to the first end of the clamp body is formed with a first arc chamfer. The clamp body is made of metal material, which effectively avoids the problem of plastic fragmentation and connection failure of plastic clamps or plastic copper clamps due to aging and other reasons. The second end of the clamp body is expandable by the provision of the slits, and the first end of the clamp body is expandable by the provision of the openings. Thus, the insertion of the bellows into the clamp body is facilitated by the provision of the slits and the openings. When the bellows is inserted into the clamping ring body, the first arc chamfer plays a guiding role. Under the guiding role of the first arc chamfer, the bellows stretches the second end and makes the clamping ring body pass a wave crest and then be clamped at the wave trough. In this way, after the clamping ring body passes three wave crests in sequence, the clamping ring body is clamped at the third wave trough through the protrusion, thereby realizing the positioning installation of the bellows.

[0020] (2) The utility model discloses a quick-insert sleeve for connecting a bellows, comprising a bellows, a compression sleeve, a sealing sleeve and a locking nut, and also comprising the insertable clamping ring. The compression sleeve, the insertable clamping ring, the sealing sleeve and the locking nut are sequentially arranged on the outside of the bellows from back to front, the compression sleeve is threadedly connected to the locking nut, and the insertable clamping ring and the sealing sleeve are axially limited between the compression sleeve and the locking nut. The sleeve can be installed without disassembly. Specifically, during installation, it is only necessary to insert the bellows with the coating removed from one end into the sleeve so that the clamping ring body passes over the three wave crests of the bellows and is locked at the third wave valley. Then, the locking nut and the compression sleeve are tightened. The second inclined surface of the compression sleeve applies pressure to the clamping ring body through the first inclined surface, so that the clamping ring body further contracts axially and is locked at the wave valley of the bellows, thereby preventing the bellows from falling out. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model, the following is a brief introduction to the drawings required for use in the description of the specific implementation methods. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a sectional view of the overall structure of the utility model;

[0023] Figure 2 is the enlarged schematic view of the structure at position A of the present utility model; Figure 1

[0024] Figure 3 is the cross-sectional view of the snap ring body of the present utility model;

[0025] Figure 4 is the top view of the snap ring body of the present utility model;

[0026] Figure 5 is the side view of the snap ring body of the present utility model;

[0027] Figure 6 is the cross-sectional view of the locking nut of the present utility model;

[0028] Figure 7 is the cross-sectional view of the compression sleeve of the present utility model;

[0029] Figure 8 is the cross-sectional view of the sealing sleeve of the present utility model.

[0030] Figures 1 to 8 The reference numerals in the figure are:

[0031] 1, snap ring body; 11, slit; 12, second end; 121, protrusion; 122, first arc chamfer; 123, first inclined surface; 13, first end; 131, opening; 2, bellows; 21, coating layer; 22, wave crest; 23, wave trough; 3, compression sleeve; 31, second inclined surface; 32, installation groove; 33, leakage detection hole; 4, locking nut; 41, limiting boss; 5, sealing sleeve; 51, convex ring; 52, second arc chamfer; 6, sealing ring. Detailed implementation manners

[0032] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following will describe the detailed implementation manners of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0033] ​In the description of the present utility model, it should be understood that if there are terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0034] In addition, if there are terms such as "first" and "second", these terms are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, if there is a term "plurality", the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In the present utility model, unless otherwise clearly defined and limited, if there are terms such as "installed", "connected", "joined", "fixed", etc., these terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly defined and limited, if there is a description such as a first feature being "on" or "under" a second feature, etc., the meaning may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0037] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the present invention are only for the purpose of illustration and do not represent the only implementation mode.

[0038] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] As Figures 1 to 8 shown, an insertable snap ring includes a snap ring body 1. The snap ring body 1 is made of a metal material. The first end 13 of the snap ring body 1 is an insertion end for inserting a bellows 2, and the second end 12 of the snap ring body 1 is a detent end that is detachably engaged with the bellows 2. A plurality of slits 11 are formed in the circumferential direction of the peripheral wall of the snap ring body 1. The slits 11 extend from the second end 12 of the snap ring body 1 to its first end 13, and one of the slits 11 penetrates the first end 13 of the snap ring body 1, so that the snap ring body 1 is formed into an open ring having an axial opening 131. The snap ring body 1 is made of copper material. A protrusion 121 extending toward the axis of the snap ring body 1 is provided on the inner peripheral wall of the second end 12. A first arc chamfer 122 is formed on the end face of the protrusion 121 close to the first end 13 of the snap ring body 1.

[0040] Based on the above embodiments, the utility model aims to provide an insertable snap ring, comprising a snap ring body 1, the snap ring body 1 is made of metal material, the first end 13 of the snap ring body 1 is an insertion end for inserting the bellows 2, and the second end 12 of the snap ring body 1 is a stop end for stop fitting with the bellows 2; the peripheral wall of the snap ring body 1 is provided with a plurality of slits 11 along the circumferential direction, the slits 11 extend from the second end 12 of the snap ring body 1 to the first end 13 thereof, and one of the slits 11 passes through the first end 13 of the snap ring body 1, so that the snap ring body 1 is formed into an open ring with an axial opening 131. The inner peripheral wall of the second end 12 is provided with a protrusion 121 extending toward the axis of the snap ring body 1. The end surface of the protrusion 121 close to the first end 13 of the snap ring body 1 is formed with a first arc chamfer 122. The snap ring body 1 is made of metal material, which effectively avoids the problem of plastic or plastic copper snap rings being broken due to aging and other reasons, resulting in connection failure. The second end 12 is expandable by the slit 11 , and the first end 13 is expandable by the opening 131 . Thus, the slit 11 and the opening 131 facilitate the insertion of the bellows 2 into the clamping ring body 1 .

[0041] In this embodiment, the first arc chamfer 122 is concave toward the second end 12. Figure 3 As shown, when the bellows 2 is inserted into the clamping ring body 1, the first arc chamfer 122 plays a guiding role. Under the guiding role of the first arc chamfer 122, the bellows 2 opens the second end 12, and makes the clamping ring body 1 pass through a wave crest 22 and then be clamped at the wave valley 23. In this way, after the clamping ring body 1 passes through three wave crests 22 in sequence, the clamping ring body 1 is clamped at the third wave valley 23 through the protrusion 121, thereby realizing the positioning and installation of the bellows 2.

[0042] In this embodiment, if Figure 4 As shown, the peripheral wall of the snap ring body 1 is provided with a plurality of slits 11 along the circumferential direction, and the slits 11 extend from the second end 12 to the first end 13 of the snap ring body 1, and one of the slits 11 penetrates the first end 13 of the snap ring body 1, so that the snap ring body 1 is formed into an open ring with an axial opening 131. Only one of the slits 11 penetrates the first end 13 of the snap ring body 1, and the other slits 11 are cut-off slits 11 and do not penetrate the first end 13. By providing one opening 131, the first end 13 can be expanded; the opening 131 is provided only one, so as to make the snap ring body 1 an integral open ring.

[0043] In this embodiment, the clamp body 1 is made of copper. Copper has the characteristics of being strong and corrosion-resistant. The clamp body 1 is made of copper, which can increase the service life of the clamp body 1 and reduce rust.

[0044] As another preferred solution of the present utility model, the slits 11 are evenly distributed along the circumferential wall of the snap ring body 1. In this embodiment, 5-7 slits 11 are provided along the circumferential direction on the circumferential wall of the snap ring body 1. When the number of the slits 11 is increased, the expansibility of the snap ring body 1 will increase accordingly, but the strength of the snap ring body 1 will decrease; conversely, when the number of the slits 11 is decreased, the expansibility of the snap ring body 1 will decrease accordingly, but the strength of the snap ring body 1 will increase. In this embodiment, as Figure 4 shown, 6 slits 11 are provided on the second end 12 and are evenly distributed along its circumferential direction. This structural design takes into account both the expansion performance and the strength performance of the snap ring body 1. At the same time, 6 is an even number, which is more convenient for processing.

[0045] As another preferred solution of the present utility model, the wall thickness of the second end 12 of the snap ring body 1 is greater than the wall thickness of its first end 13. In this embodiment, as Figure 3 shown, the wall thickness of the second end 12 of the snap ring body 1 is set to be relatively thick, which improves the overall strength of the snap ring body 1. The wall thickness of the first end 13 of the snap ring body 1 is set to be relatively thin, which improves the expansibility of the first end 13 of the snap ring body 1 and facilitates the bellows 2 to be inserted from the first end 13; the slits 11 are provided on the relatively thick second end 12, which improves the expansion performance of the second end 12 and facilitates the bellows 2 to expand the second end 12 of the snap ring body 1.

[0046] As Figure 1 and Figure 2 shown, another object of the present utility model is to provide a quick-insert bellows connection sleeve, which includes a bellows 2, a compression sleeve 3, a sealing sleeve 5 and a locking nut 4, and further includes the above-mentioned insert snap ring. The compression sleeve 3, the insert snap ring, the sealing sleeve 5 and the locking nut 4 are sequentially sleeved on the outside of the bellows 2 from back to front. The compression sleeve 3 is threadedly connected with the locking nut 4. The insert snap ring and the sealing sleeve 5 are axially limited between the compression sleeve 3 and the locking nut 4. A first inclined surface 123 is provided on the outer circumferential wall of the second end 12 of the snap ring body 1, and a second inclined surface 31 adapted to the first inclined surface 123 is provided at the front end of the compression sleeve 3. The protrusion 121 of the second end 12 is clamped at the wave valley 23 of the bellows 2. In this embodiment, as Figure 1 and Figure 2As shown, the sleeve can achieve installation without disassembly. Specifically, during installation, only the corrugated pipe 2 with the covering layer 21 removed at one end needs to be inserted into the sleeve. The corrugated pipe 2 is inserted into the snap ring body 1 from the first end 13, so that the snap ring body 1 crosses three wave crests 22 of the corrugated pipe 2. The protrusion 121 at the second end 12 of the snap ring body 1 is clamped at the third wave valley 23. Then, the lock nut 4 and the pressing sleeve 3 are tightened. The second inclined surface 31 of the pressing sleeve 3 applies pressure to the snap ring body 1 through the first inclined surface 123, so that the snap ring body 1 further contracts axially and is clamped and limited at the wave valley 23 of the corrugated pipe 2, thereby preventing the corrugated pipe 2 from coming out.

[0047] In this embodiment, as Figure 2 shown, under the action of the limit boss 41, it is possible to prevent the front end of the corrugated pipe 2 from passing through the front end of the lock nut 4 due to excessive installation of the corrugated pipe 2, improving the stability of installing the corrugated pipe 2. In this embodiment, as Figure 2 shown, the setting of the sealing sleeve 5 increases the sealing performance between the lock nut 4 and the corrugated pipe 2. Specifically, during assembly, under the extrusion of the pressing sleeve 3, the inner peripheral side of the sealing sleeve 5 fits with the outer peripheral side of the corrugated pipe 2, and the outer peripheral side of the sealing sleeve 5 fits with the inner peripheral side of the lock nut 4, thereby increasing the sealing performance between the lock nut 4 and the corrugated pipe 2. In a further preferred embodiment, a convex ring 51 is provided at the front end of the sealing sleeve 5, and a second arc chamfer 52 is provided on one end face of the convex ring 51 close to the inner wall of the sealing sleeve 5. When the lock nut 4 and the pressing sleeve 3 are tightened, the sealing sleeve 5 is deformed under extrusion, so that the convex ring 51 closely cooperates with the front end of the corrugated pipe 2 to form an end seal; the second arc chamfer 52 closely cooperates with the outer wall of the first wave crest 22 to form a ring seal, thus greatly improving the sealing effect.

[0048] As another preferred solution of the present invention, a covering layer 21 is provided on the outer periphery of the corrugated pipe 2, a sealing ring 6 is provided between the pressing sleeve 3 and the covering layer 21, and an installation groove 32 for installing the sealing ring 6 is provided on the inner wall of the pressing sleeve 3. In this embodiment, as Figure 1 and Figure 7 shown, the sealing ring 6 is in sealing cooperation with the outer peripheral side of the covering layer 21 of the corrugated pipe 2, so the sealing performance of the sleeve is greatly improved; at the same time, the setting of the sealing ring 6 can also block foreign objects from entering the pressing sleeve 3 through the assembly gap, thereby playing a role in preventing pollution. When installing the sealing ring 6, the sealing ring 6 is clamped in the installation groove 32, so that the sealing ring 6 is not easily separated from the pressing sleeve 3 during use, improving the stability of the sealing ring 6.

[0049] As another preferred solution of the present invention, the pressing sleeve 3 is provided with a radially penetrating leakage detection hole 33. In this embodiment, as Figure 1 and Figure 7As shown, when leakage occurs, the leaked liquid or gas will overflow from the leakage detection hole 33. By checking the leakage detection hole 33, the operator can know whether the sleeve leaks, which is convenient for detection and maintenance and improves the use safety.

[0050] Obviously, the above embodiments are only examples for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. The obvious changes or variations derived therefrom are still within the protection scope of the present utility model.

Claims

1. An insertable snap ring, comprising a snap ring body (1), characterized in that: The snap ring body (1) is made of a metal material. The first end (13) of the snap ring body (1) is an insertion end for inserting the corrugated pipe (2), and the second end (12) of the snap ring body (1) is a locking end for anti-disengagement cooperation with the corrugated pipe (2). A plurality of slits (11) are formed in the circumferential direction of the peripheral wall of the snap ring body (1). The slits (11) extend from the second end (12) of the snap ring body (1) towards its first end (13), and one of the slits (11) penetrates through the first end (13) of the snap ring body (1), so that the snap ring body (1) is formed into an open ring with an axial opening (131).

2. The insert-type snap ring according to claim 1, wherein: A protrusion (121) extending towards the axis of the snap ring body (1) is provided on the inner peripheral wall of the second end (12).

3. The insert-type snap ring according to claim 2, characterized in that: A first arc chamfer (122) is formed on the end face of the protrusion (121) close to the first end (13) of the snap ring body (1).

4. The insert type snap ring according to claim 1, wherein: The slits (11) are evenly distributed along the peripheral wall of the snap ring body (1).

5. The insert-type snap ring according to claim 1, wherein: The snap ring body (1) is made of copper material.

6. The insert-type snap ring according to claim 1, characterized in that: The wall thickness of the second end (12) of the snap ring body (1) is greater than the wall thickness of its first end (13).

7. A sleeve for quick-insert connection of corrugated pipes, comprising a corrugated pipe (2), a compression sleeve (3), a sealing sleeve (5) and a locking nut (4), characterized in that, It further includes a plug-in snap ring as described in any one of claims 1-6. The compression sleeve (3), the plug-in snap ring, the sealing sleeve (5) and the locking nut (4) are sequentially sleeved on the outside of the corrugated pipe (2) from the rear to the front. The compression sleeve (3) is threadedly connected with the locking nut (4), and the plug-in snap ring and the sealing sleeve (5) are axially limited between the compression sleeve (3) and the locking nut (4).

8. The socket for quick-insert bellows connection according to claim 7, characterized in that: A first inclined surface (123) is provided on the outer peripheral wall of the second end (12) of the snap ring body (1), and a second inclined surface (31) adapted to the first inclined surface (123) is provided at the front end of the compression sleeve (3).

9. The socket for quick-insert bellows connection according to claim 7, characterized in that: A coating layer (21) is provided on the outer periphery of the corrugated pipe (2). A sealing ring (6) is provided between the compression sleeve (3) and the coating layer (21), and an installation groove (32) for installing the sealing ring (6) is provided on the inner wall of the compression sleeve (3).

10. A sleeve for quick - plug type corrugated pipe connection according to claim 7, characterized in that: A leakage detection hole (33) penetrating radially is provided on the compression sleeve (3).

Images