CN113503412B

CN113503412B - Corrugated pipe quick installation connector and corrugated pipe applying same

Info

Publication number: CN113503412B
Application number: CN202110798345.6A
Authority: CN
Inventors: 潘利玲; 程燕
Original assignee: Wuhu Taihe Pipe Industry Co ltd
Current assignee: Wuhu Taihe Pipe Industry Co ltd
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2022-09-27
Anticipated expiration: 2041-07-15
Also published as: CN113503412A

Abstract

The invention discloses a quick corrugated pipe installation connector and a corrugated pipe applying the same, and belongs to the technical field of corrugated pipe connectors. The invention comprises a base inner screw and an outer screw joint which are matched, wherein a retaining ring with a hollow inner part is arranged in the outer screw joint, the retaining ring comprises an inner block section and an expansion section, a retaining ring is arranged on the periphery of the expansion section, the retaining ring comprises a plurality of retaining ring bodies with arc structures and an elastic ring, a connecting groove is arranged on the periphery of the retaining ring body in the circumferential direction, the elastic ring is embedded into the connecting groove, and the plurality of retaining ring bodies are sequentially connected in series by the elastic ring to form a ring body structure; the split ring with the ring body structure is installed inside the inner thread of the base, the outer side end of the split ring is in contact with the clamping ring, and the end of the expansion section is in contact with the outer side end of the split ring. The invention provides a quick installation joint of a corrugated pipe and the corrugated pipe applying the joint, which has the advantages of simple structure and convenience in installation, and can realize quick installation on the premise of ensuring good air tightness of the corrugated pipe.

Description

Corrugated pipe quick installation connector and corrugated pipe applying same

Technical Field

The invention relates to the technical field of corrugated pipe joints, in particular to a corrugated pipe quick installation joint and a corrugated pipe applying the same.

Background

The metal corrugated pipe is used as a sensitive element, a damping element, a compensation element, a sealing element, a valve element and a pipeline connecting piece, and is widely applied to the fields of automatic control and measuring instruments, vacuum technology, mechanical industry, electric power industry, transportation, atomic energy industry and the like.

The connection mode of the metal corrugated pipe generally adopts flange connection, welding, screw thread connection, quick connector connection and the like, the small-caliber metal corrugated pipe generally adopts screw thread and quick connector connection, and the larger caliber generally adopts flange connection and welding. At present, the performance requirement of user to stainless steel corrugated hose in installation, use is more and more high, not only will realize quick installation, sealed reliable, can also play the function of anti-disassembly simultaneously, and few products that can possess above requirement simultaneously on the market, consequently need design a simple structure urgently, sealed reliable, and can realize the quick erection joint of bellows of quick installation.

Through search, the structure of the corrugated pipe quick connector is disclosed in the patent literature, for example, the patent with the Chinese patent application number of 2019106237278 discloses a stainless steel corrugated pipe hard sealing connector unit and a corrugated pipe using the same, and belongs to the field of corrugated pipe sealing. The hard sealing joint unit comprises a gasket, O-shaped rings, a base outer wire and an inner wire joint, wherein the gasket and the O-shaped rings are arranged on the outer side of a corrugated pipe, the base outer wire and the base inner wire joint are matched with each other, the O-shaped rings are respectively sleeved on the outer sides of two adjacent wave trough sections, the two wave trough sections are inwards recessed, the outer wire conical head and the inner wire conical head are respectively arranged on the opposite side surfaces of the bottom of the base outer wire and the bottom of the base inner wire joint, the gasket is sleeved on the outer side of the corrugated pipe and is positioned between the outer wire conical head and the inner wire conical head, and two ends of the bottom of the gasket are positioned between the two O-shaped rings.

Also, for example, chinese patent application No. 2016100162378 discloses a hard seal structure for a stainless steel corrugated hose connector, which includes a corrugated hose, a nut, and an external thread connector; the corrugated hose and the external thread joint respectively penetrate through two end heads of the nut and are connected through the nut; the nut is inserted into the nut, the corrugated hose end is provided with a corrugated neck, and the annular cavity of the clamping ring is a cone; the pipe orifice wave ring of the corrugated hose in the snap ring annular cavity is formed into a conical ring clamped on the conical surface of the snap ring annular cavity through wave beating; the metal ring is embedded in the conical surface of the end part of the external thread joint screwed in the nut and the corrugated hose and is matched with the conical ring.

Disclosure of Invention

1. Technical problem to be solved by the invention

In order to solve the problems, the invention provides a quick corrugated pipe installation joint and a corrugated pipe using the same, which are simple in structure and convenient to install, can realize quick installation on the premise of ensuring good air tightness of the corrugated pipe, and can also play a role in preventing disassembly.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the invention relates to a quick installation joint of a corrugated pipe and the corrugated pipe applying the quick installation joint, which comprise a base inner screw and an outer screw joint which are matched, wherein a retaining ring with a hollow inner part is arranged in the outer screw joint and comprises an inner block section and an expansion section, a retaining ring is arranged on the periphery of the expansion section and comprises a plurality of retaining ring bodies with arc structures and elastic rings, a connecting groove is arranged on the periphery of each retaining ring body in the circumferential direction, the elastic rings are embedded into the connecting groove, and the elastic rings sequentially connect the plurality of retaining ring bodies in series to form a ring body structure; the split ring with the ring body structure is installed inside the inner thread of the base, the outer side end of the split ring is in contact with the clamping ring, and the end of the expansion section is in contact with the inner side face of the outer side end of the split ring.

As a further improvement of the invention, an inner wire sealing ring is also arranged in the inner wire of the base, the inner wire sealing ring comprises an inner supporting part, an outer supporting part and a matching part which are nested from inside to outside in sequence, wherein the outer diameter of the matching part is matched with the inner diameter of the inner wire of the base.

As a further improvement of the invention, a circle of support ring which is raised inwards is arranged around the circumferential direction in the split ring, one side of the split ring is abutted against the outer side end of the outer support part, and the support ring is sleeved on the periphery of the outer side end of the inner support part.

As a further improvement of the invention, the sectional area of the inner supporting part is gradually reduced along the direction close to the split ring, and the end part of the split ring close to the inner supporting part is provided with a reducing section matched with the outer side end part of the inner supporting part.

As a further improvement of the invention, one end of the matching part, which is far away from the outer supporting part, is also provided with an annular embedded part, the diameter size of the embedded part is smaller than that of the matching part, and a plurality of mounting grooves are arranged on the embedded part in the circumferential direction.

As a further improvement of the invention, a plurality of limiting parts which are protruded outwards are uniformly arranged on the embedded section at intervals around the circumferential direction, and a positioning groove is arranged in the outer screw joint at a position corresponding to the limiting parts.

As a further improvement of the invention, the expansion section is uniformly provided with a plurality of jointing sections which expand outwards at intervals around the circumferential direction, a gap is reserved between every two adjacent jointing sections, and one clamping ring body is correspondingly jointed on the periphery of one jointing section.

As a further improvement of the invention, the interior of the clamp ring body is circumferentially provided with an inward-convex arc-shaped attaching part, and the arc-shaped attaching part is matched with the periphery of the attaching section of the expansion section.

As a further improvement of the invention, an O-shaped sealing ring is arranged at the position where the inner thread of the base is contacted with the joint of the outer thread.

As a further improvement of the present invention, there is a quick-install coupling as described above.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

(1) according to the quick installation joint for the corrugated pipe, the elastic ring sequentially connects the plurality of clamp ring bodies in series to form the ring body structure, the elastic ring has certain elasticity, when the clamp ring is sleeved on the periphery of the expansion section, the elastic ring expands outwards under the action of the extrusion force and props the connected clamp ring bodies open, so that an installation gap is formed between the two connected clamp ring bodies, the clamp ring bodies are conveniently and tightly clamped on the periphery of the expansion section to realize elastic expansion, the subsequent clamp ring is guaranteed to be propped on the baffle ring under the propping action force of the corrugated pipe, at the moment, the split ring props on the baffle ring, the clamp ring can automatically sleeve the corrugated pipe from the lower baffle ring in a sliding mode, and the quick installation of the quick joint on the corrugated pipe is realized.

(2) According to the quick mounting joint for the corrugated pipe, the plurality of limiting parts protruding outwards are uniformly arranged on the embedded section at intervals along the circumferential direction, the positions, corresponding to the limiting parts, in the external screw joint are provided with the positioning grooves, the limiting parts are flexible parts, when the embedded section is embedded into the external screw joint during joint assembly, the limiting parts are correspondingly clamped into the corresponding positioning grooves to clamp and position the check ring, the conditions that the check ring is displaced or rotated and the like can be effectively avoided during subsequent mounting of the quick joint and the corrugated pipe, the subsequent clamping between the check ring and the corrugated pipe is prevented from being influenced, the situation that the check ring is misplaced is avoided, the connection tightness between the quick joint and the corrugated pipe is improved, and a good sealing effect is ensured.

(3) According to the quick installation joint for the corrugated pipe, the inward-protruding arc-shaped attaching portion is arranged in the clamping ring body in the circumferential direction, the arc-shaped attaching portion is matched with the periphery of the attaching section of the expansion section, the arc-shaped attaching portion forms a complete annular structure under the connection of the elastic ring and is sleeved on the periphery of the check ring, effective abutting and attaching of the check ring are guaranteed, meanwhile, the quick installation joint and the corrugated pipe are quickly installed and good sealing effect are achieved for the purpose that the quick installation joint and the corrugated pipe are subsequently clamped in the wave trough of the corrugated pipe more stably.

(4) According to the quick installation joint for the corrugated pipe, the end part, far away from the outer screw joint, of the inner screw of the base is sleeved on the corrugated pipe and is extruded and slid towards the corrugated pipe direction by force, the split ring is supported on the check ring in the sliding and extruding process, the snap ring slides down from the lower check ring to be automatically sleeved in the first trough of the corrugated pipe under the extruding action of the corrugated pipe, the snap ring has a sealing effect and a clamping effect, the quick installation of the quick joint on the corrugated pipe is realized, the number of integral structural parts is small, the use is more convenient, the quick joint and the corrugated pipe can be installed by bare hands, and meanwhile, the anti-disassembly function can be realized.

Drawings

FIG. 1 is a schematic structural view of a bellows quick mount coupling installation of the present invention;

FIG. 2 is a schematic structural view of a quick connect coupling for corrugated tubing of the present invention;

FIG. 3 is a schematic view of the construction of the external thread joint according to the present invention;

FIG. 4 is a schematic cross-sectional view of FIG. 3;

FIG. 5 is a schematic view of the structure with the outer wire connector removed;

FIG. 6 is a schematic view of the structure of the base inner wire of the present invention;

FIG. 7 is a schematic cross-sectional view of a quick connect coupling for corrugated tubing of the present invention;

FIG. 8 is a schematic view of the construction of the retainer ring of the present invention;

FIG. 9 is a schematic view of a snap ring according to the present invention;

FIG. 10 is a schematic view of the installation structure of the split ring and the inner wire seal ring of the present invention;

FIG. 11 is a schematic view of the split ring of the present invention;

FIG. 12 is a schematic view of the inner wire seal ring of the present invention;

fig. 13 is a schematic view of the structure of the female wire seal ring of the present invention.

The reference numerals in the schematic drawings illustrate:

100. a quick coupling; 110. an external thread joint; 111. an outer connecting section; 112. a first bearing section; 113. a bearing section II; 114. an O-shaped sealing ring; 115. an inner connecting section; 11. a fitting cavity; 12. a first matching cavity; 13. a second matching cavity; 120. base internal thread; 121. a base connection section; 122. a clamping section; 123. a sealing section; 130. a retainer ring; 131. an inner block; 132. a limiting part; 133. a buckling section; 140. a snap ring; 141. a snap ring body; 142. installing a notch; 143. an elastic ring; 144. a bonding section; 150. a split ring; 160. an internal thread sealing ring; 161. an inner support portion; 162. an outer support portion; 163. a fitting portion; 164. an embedded part; 165. installing a groove; 170. an inner washer; 200. a bellows.

Detailed Description

For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present invention will be further described with reference to the following examples.

Example 1

Referring to fig. 1-13, the quick-install coupling for corrugated pipes and the corrugated pipe using the same of the present embodiment includes a base inner wire 120 and a base outer wire 110, which are matched with each other, and the base inner wire 120 and the base outer wire 110 are structures commonly adopted in a hard sealing coupling for a corrugated pipe 200, and are screwed together to achieve a hard seal. As shown in fig. 7, in the embodiment, the external connection fitting 110 is internally provided with a retaining ring 130 with a hollow interior, the retaining ring 130 includes an inner block 131 and an expansion section 133, wherein the periphery of the expansion section 133 is provided with a snap ring 140, the snap ring 140 includes a plurality of snap ring bodies 141 with circular arc structures and an elastic ring 143, the periphery of the snap ring body 141 is circumferentially provided with a connecting groove, the elastic ring 143 is embedded in the connecting groove, and the elastic ring 143 sequentially and serially connects the plurality of snap ring bodies 141 to form a ring structure, the elastic ring 143 has certain elasticity, when the snap ring 140 is sleeved on the periphery of the expansion section 133, the elastic ring 143 expands outwards under the action of a squeezing force and props up the connected snap ring bodies 141, so that an installation gap 142 is formed between two connected snap ring bodies 141, which is conveniently and tightly clamped on the periphery of the expansion section 133, elastic expansion and contraction is achieved, and it is ensured that the subsequent snap ring 140 is under the propping action force of the bellows 200, at this time, the split ring 150 is supported against the retainer ring 130, and the snap ring 140 can slide down from the lower retainer ring 130 and automatically sleeve on the corrugated tube 200, so that the quick coupling 100 is quickly mounted on the corrugated tube 200.

Specifically, as shown in fig. 8, in this embodiment, a plurality of limiting portions 132 protruding outward are uniformly arranged on the inner block 131 at intervals around the circumferential direction, a positioning groove is formed in a position corresponding to the limiting portion 132 inside the outer screwed joint 110, and the limiting portion 132 is a flexible component, when the joint is assembled and the inner section 131 is embedded into the outer screwed joint 110, the limiting portion 132 is correspondingly clamped into the corresponding positioning groove to clamp and position the retainer ring 130, so that the retainer ring 130 can be effectively prevented from shifting or rotating when the subsequent quick joint 100 is installed on the corrugated pipe 200, the subsequent clamping between the clamping ring 140 and the corrugated pipe 200 is prevented from being affected, the situation that the clamping ring 140 is dislocated is avoided, the tight connection between the quick joint 100 and the corrugated pipe 200 is improved, and a good sealing effect is ensured.

The expansion section 133 is provided with the laminating section of a plurality of outside expansions around the even interval of circumference in this embodiment, leaves the breach between two adjacent laminating sections, and a snap ring body 141 corresponds the periphery of laminating at a laminating section, and the breach on the expansion section 133 is corresponding with installation breach 142 position on the snap ring 140 simultaneously, can further the swordsman guarantee that snap ring 140 can closely laminate in the periphery of retaining ring 130, guarantees the stability of quick-operation joint 100 installation. Specifically, in this embodiment, the expanding section 133 is shaped like a petal, and the number of petals corresponds to the number of the snap ring bodies 141, that is, each petal of the expanding section 133 is provided with one snap ring body 141 on the periphery. As shown in fig. 9, in this embodiment, an inward-protruding arc-shaped attaching portion 144 is circumferentially disposed inside the snap ring body 141, the arc-shaped attaching portion 144 is matched with the attaching section periphery of the expanding section 133, the arc-shaped attaching portion 144 forms a complete annular structure under the connection of the elastic ring 143 and is sleeved on the periphery of the snap ring 130, so as to ensure effective abutting attachment with the snap ring 130, and meanwhile, for subsequent stable engagement in the wave trough of the corrugated pipe 200, quick installation and good sealing effect of the quick connector 100 and the corrugated pipe 200 are realized.

In this embodiment, the split ring 150 having a ring structure is installed inside the base inner wire 120, the outer end of the split ring 150 contacts with the snap ring 140, and the end of the expansion section 133 is embedded inside the split ring 150. Specifically, in this embodiment, an inner wire sealing ring 160 is further installed inside the base inner wire 120, and a split ring 150 is disposed at an outer end of the inner wire sealing ring 160, wherein the inner wire sealing ring 160 includes an inner supporting portion 161, an outer supporting portion 162, and a matching portion 163, which are sequentially nested from inside to outside, an outer diameter of the matching portion 163 is matched with an inner diameter of the base inner wire 120, the matching portion 163 is matched and clamped into the base inner wire 120, and the inner wire sealing ring 160 is nested, so that a better sealing effect can be achieved, and the inner wire sealing ring 160 is made of a flexible material, and can better contact with the periphery of the corrugated pipe 200 and the inside of the base inner wire 120, thereby ensuring a good sealing effect.

The inside of the split ring 150 is circumferentially provided with a circle of support rings protruding inwards, one side of the split ring 150 abuts against the outer side end of the outer support portion 162, and the support rings are sleeved on the outer side end periphery of the inner support portion 161. Specifically, as shown in fig. 10, the split ring 150 is sleeved on the outer periphery of the inner support portion 161, and an end of the split ring 150 close to the inner wire seal ring 160 contacts an outer end of the outer support portion 162. As shown in fig. 12, in this embodiment, the sectional area of the inner support portion 161 is gradually reduced along the direction approaching the split ring 150, that is, the inner support portion 161 is a hollow conical structure, and the end of the split ring 150 approaching the inner support portion 161 is provided with a reducing section matching with the outer end of the inner support portion 161, when the quick coupling 100 is installed, the split ring 150 is sleeved on the outer periphery of the inner support portion 161, at this time, the split ring 150 contacts with the retainer ring 130, and the end of the expanding section 133 contacts with the outer end of the split ring 150.

As shown in fig. 13, in this embodiment, an annular embedded portion 164 is further disposed at an end of the matching portion 163 away from the outer supporting portion 162, a diameter of the embedded portion 164 is smaller than a diameter of the matching portion 163, and the design of the embedded portion 164 and the matching portion 163 in a ladder shape corresponds to a ladder cavity inside the base inner wire 120, so that the inner wire sealing ring 160 can be better fixed inside the base inner wire 120, and is not easy to fall off, thereby effectively ensuring a good sealing effect. In this embodiment, a plurality of mounting grooves are formed in the embedded portion 164 in the circumferential direction, so that the weight can be reduced, the flexibility of the inner wire sealing ring 160 is improved, and the inner wire 120 of the base can be conveniently and better plugged into the base, so that the labor is saved. The O-ring 114 is disposed at the position where the inner wire 120 of the base contacts the outer wire connector 110, so as to further ensure the sealing performance of the connection, avoid leakage, and improve the safety of use.

As shown in fig. 3 and 4, the outer wire connector 110 in this embodiment includes an outer connecting section 111, a first receiving section 112, a second receiving section 113, and an inner connecting section 115 sequentially arranged along a direction close to the inner wire 120 of the base, wherein the outer connecting section 111, the second receiving section 113, and the inner connecting section 115 are all hollow cylindrical structures, a diameter of the second receiving section 113 is larger than a diameter of the inner connecting section 115, and a diameter of the inner connecting section 115 is larger than a diameter of the outer connecting section 111. In this embodiment, the internal cavities corresponding to the external connection section 111, the first receiving section 112, the second receiving section 113, and the internal connection section 115 are respectively a fitting cavity 11, a first matching cavity 12, a second matching cavity 13, and a rotation cavity, wherein the inner block 131 is embedded in the fitting cavity 11, the one end of the expansion section 133 is embedded in the first matching cavity 12, and the other end of the expansion section 133 contacts with the inner wall of the second matching cavity 13. The outer periphery of the end part of the inner connecting section 115 close to the second receiving section 113 is sleeved with an O-shaped sealing ring 114, and the outer side of the inner connecting section 115 is provided with an outer spiral section which is matched and screwed with the outer spiral section on the inner thread 120 of the base to complete the assembly of the quick coupling.

As shown in fig. 6 and 7, the base inner wire 120 is sequentially provided with a base connecting section 121, a clamping section 122 and a sealing section 123 along a direction away from the outer wire joint 110, an inner thread section matched with the outer thread section on the inner connecting section 115 is arranged inside the base connecting section 121, and the diameters of the inner cavities of the base connecting section 121, the clamping section 122 and the sealing section 123 are gradually reduced to form a step-shaped cavity, so that the inner wire sealing ring 160 is conveniently matched with the shape of the inner wire sealing ring 160, the inner wire sealing ring 160 is effectively fixed, and the overall stability of the joint is improved. In this embodiment, a groove is formed in the inner side wall of the sealing section 123 of the inner wire 120 of the base, and an inner gasket 170 is installed in the groove, so that the sealing effect between the inner gasket and the corrugated pipe 200 can be further ensured.

The bellows of an applied quick erection joint of this embodiment adopts above-mentioned quick erection joint 100, can realize quick installation, and sealed effectual, quick connection 100 is difficult for droing, and the convenience and the safety in utilization of use can all be improved the promotion by a wide margin.

The installation method of the quick installation joint comprises the following steps:

s1: assembling internal parts of the outer wire joint 110, namely sleeving the snap ring 140 on the expansion section 133 of the retainer ring 130, embedding the embedded section 131 of the retainer ring 130 into the outer wire joint 110, and sleeving the O-shaped sealing ring 114 on the internal connecting section 115 of the outer wire joint 110 to complete the assembly of the outer wire joint 110;

s2: assembling internal parts of the base internal thread 120, namely embedding the internal thread sealing ring 160 into the base internal thread 120, and sleeving the split ring 150 on the periphery of the inner supporting part 161 of the internal thread sealing ring 160 to finish the assembly of the base internal thread 120;

s3: and (3) assembling the quick connector 100, namely correspondingly and rotatably assembling the outer screw connector 110 and the base inner screw 120 together to finish the assembling of the quick connector 100.

S4: quick-operation joint 100 and bellows 200's installation, the tip cover that keeps away from outer silk joint 110 on the base internal thread 120 changes on bellows 200, and push to the bellows 200 direction with strength and slide, at the extruded in-process that slides, components of a whole that can function independently circle 150 shore on retaining ring 130, snap ring 140 is under the extrusion of bellows 200, automatic cover is in the first trough of bellows 200 under retaining ring 130 slides down, snap ring 140 has both played the sealed effect and has played the chucking effect, realize quick-operation joint 100 quick installation on bellows 200, overall structure part is less, it is more convenient to use, bare-handed installation that can realize quick-operation joint 100 and bellows 200, can also play the function of anti-disassembly simultaneously.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.

Claims

1. The utility model provides a quick erection joint of bellows which characterized in that: the outer screw joint comprises a base inner screw (120) and an outer screw joint (110) which are matched, a check ring (130) with a hollow inner part is arranged in the outer screw joint (110), the check ring (130) comprises an inner block (131) and an expansion section (133), a clamping ring (140) is arranged on the periphery of the expansion section (133), the clamping ring (140) comprises a plurality of clamping ring bodies (141) with arc structures and an elastic ring (143), a connecting groove is formed in the periphery of each clamping ring body (141) in a circumferential direction, the elastic ring (143) is embedded into the connecting groove, and the plurality of clamping ring bodies (141) are sequentially connected in series by the elastic ring (143) to form a ring body structure; a split ring (150) in a ring body structure is installed inside the base inner wire (120), the outer side end of the split ring (150) is in contact with the clamping ring (140), and the end of the expansion section (133) is in contact with the inner side face of the outer side end of the split ring (150).

2. A quick-install coupling for corrugated tubing as claimed in claim 1 wherein: the inner wire sealing ring (160) is further installed inside the inner wire (120) of the base, the inner wire sealing ring (160) comprises an inner supporting portion (161), an outer supporting portion (162) and a matching portion (163) which are sequentially nested from inside to outside, and the outer diameter of the matching portion (163) is matched with the inner diameter of the inner wire (120) of the base.

3. A quick-install coupling for corrugated tubing as claimed in claim 2 wherein: a circle of support rings protruding inwards are arranged in the split ring (150) in the circumferential direction, one side of the split ring (150) abuts against the outer side end of the outer support portion (162), and the support rings are sleeved on the periphery of the outer side end of the inner support portion (161).

4. A quick install coupling for corrugated tubing as claimed in claim 3 wherein: the sectional area of the inner supporting part (161) is gradually reduced along the direction close to the split ring (150), and the end part of the split ring (150) close to the inner supporting part (161) is provided with a reducing section matched with the outer side end part of the inner supporting part (161).

5. A quick-install coupling for corrugated tubing as claimed in claim 4 wherein: one end, away from the outer supporting portion (162), of the matching portion (163) is further provided with an annular embedded portion (164), the diameter size of the embedded portion (164) is smaller than that of the matching portion (163), and a plurality of mounting grooves are formed in the embedded portion (164) in the circumferential direction.

6. A quick install coupling for corrugated tubing as claimed in claim 5, wherein: a plurality of limiting parts (132) protruding outwards are arranged on the inner block (131) at intervals in the circumferential direction, and positioning grooves are formed in the positions, corresponding to the limiting parts (132), in the outer screw joint (110).

7. A quick-install coupling for corrugated tubing as claimed in claim 1 wherein: expansion section (133) encircle circumference even interval and are provided with the laminating section of a plurality of outside expansions, leave the breach between two adjacent laminating sections, and just a snap ring body (141) correspond the periphery of laminating at a laminating section.

8. A quick-install coupling for corrugated tubing as claimed in claim 7 wherein: the clamp ring body (141) is internally provided with an inward-protruding arc-shaped attaching portion (144) in a circumferential direction, and the arc-shaped attaching portion (144) is matched with the attaching section periphery of the expansion section (133).

9. A quick-install coupling for corrugated tubing as claimed in claim 1 wherein: an O-shaped sealing ring (114) is arranged at the position where the inner wire (120) of the base is contacted with the outer wire joint (110).

10. A corrugated pipe applying a quick-install coupling, comprising: having a quick-fit coupling according to any of claims 1 to 9.