CN216666836U - Connecting joint and pipe taking device - Google Patents

Abstract

The utility model relates to the field of pipe connection and disassembly, and discloses a connecting joint and a pipe taking device, which comprise: the inner pipe, the outer pipe, the first elastic claw ring and the elastic tightening ring are limited to form an annular insertion groove for the pipe to be inserted and arranged between the inner pipe and the outer pipe, a first inverted tooth piece is arranged on the first elastic claw ring, an inverted tooth part is arranged on the elastic tightening ring, and the first clamping point and the second clamping point are respectively limited with the inner pipe. The utility model has the beneficial effects that: first pawl and pawl portion extend inwards, and from outer to interior slope backward gradually, guarantee to peg graft smoothly when tubular product inserts to when tubular product received the power of outwards deviating from, first pawl and pawl portion can chucking tubular product, prevent it to deviate from annular insertion groove, can easily take out tubular product through getting a tub device simultaneously, and the installation is dismantled conveniently, and is fixed effectual.

Description

Connecting joint and pipe taking device

Technical Field

The utility model relates to the field of pipe connection and disassembly, in particular to a connecting joint and a pipe taking device.

Background

At present, a large number of pipelines are used in the fields of water supply and drainage, gas and the like, the pipelines need to be connected by using joints, the conventional pipeline joints usually adopt the modes of clamp pressing, flaring sliding and clamping sleeves and nuts, but the connection modes all have certain disadvantages: 1. the clamp-on type joint and the flaring sliding-tight type joint need to be installed by a professional water heater by adopting special tools, are high in specificity and complex in operation, can cause leakage at the joint by carelessness, cannot be detached and reused after being installed, and can only cut a pipeline if the interface leaks, so that the length of the pipeline is shortened, new pipelines and joints need to be laid again, time and labor are wasted, and money is damaged; 2. nut cutting ferrule formula connects and need tighten up the nut with the spanner and install, consequently has the requirement to installation space, needs reserve the spanner position, has certain installation limitation to use the easy not hard up of nut after a period, can cause the junction seepage. Therefore, a need exists for a connection fitting that solves the above-mentioned problems associated with prior art fittings.

SUMMERY OF THE UTILITY MODEL

The utility model provides a first purpose provides a attach fitting, its anti-disengaging structure through between inner tube and the outer tube prevents that tubular product from droing to simple to operate reduces installation cost, and the suitability is good.

The purpose of the application is realized by the following technical scheme:

a connection fitting, comprising: the elastic tightening device comprises an inner pipe, an outer pipe, a first elastic claw ring and an elastic tightening ring, wherein the outer pipe is sleeved outside the inner pipe, the rear end of the outer pipe is connected with the inner pipe, an annular insertion groove is formed between the outer pipe and the inner pipe, and the annular insertion groove is open towards the front end;

the inner wall of the outer pipe is provided with a clamping ring, the first elastic claw ring and the elastic tightening ring are both arranged in the annular insertion groove, the elastic tightening ring is arranged on the inner wall of the outer pipe and is positioned on the front side of the clamping ring, and a clamping groove is limited between the rear side of the elastic tightening ring and the front side of the clamping ring;

the first elastic claw ring comprises a first mounting ring and a first inverted tooth sheet connected to the inner side of the first mounting ring, the first mounting ring is matched and clamped in the clamping groove, the first inverted tooth sheet extends inwards and gradually inclines backwards from outside to inside, and the first inverted tooth sheet and the inner pipe are limited to form a first clamping point;

be equipped with first conical surface on the inner wall of outer tube, first conical surface interval is located the front side of snap ring, first conical surface from the past to back internal diameter crescent, elasticity tighten up have on the ring with the second conical surface that first conical surface cooperation offseted, the inner wall of elasticity tighten up ring is equipped with pawl portion, pawl portion inwards extends, and inclines gradually backward from outer to interior, pawl portion with inject between the inner tube and form the second chucking point.

In some embodiments of the present application, the elastic tightening ring includes a tightening portion and a positioning portion, the tightening portion abuts against the front side of the positioning portion, the second tapered surface is disposed on the outer wall of the tightening portion, the positioning portion and the snap ring define and form the clamping groove therebetween, and the inverted tooth portion is disposed on the inner wall of the tightening portion.

In some embodiments of the present application, the tightening part includes the tightening ring and locates the inboard sleeve pipe of tightening ring, the inner wall of tightening ring connect in the sheathed tube outer wall, tightening ring butt in the front side of location portion, pawl portion locates on the sheathed tube inner wall.

In some embodiments of this application, the sheathed tube rear side end face is pressed close to the front side setting of first pawl piece, be equipped with first step on the tightening ring, be equipped with on the sleeve pipe with the second step of first step axial fit joint is used for the restriction the sleeve pipe removes to the mouth of pipe direction.

In some embodiments of this application, the outer tube includes outer tube seat and outer tube body, the outer tube seat cover is located the outside of inner tube, the outer tube body connect in the outside of outer tube seat, the snap ring is located the front side of outer tube seat and is located the inboard of outer tube body, first conical surface is located the inner wall of outer tube body.

In some embodiments of the present application, the sealing ring is further included, a first groove is arranged on the outer wall of the inner pipe, and the sealing ring is arranged in the first groove.

In some embodiments of this application, still include second elasticity claw ring, second elasticity claw ring includes second collar extension and second pawl piece, be equipped with the second recess on the periphery wall face of inner tube, the second collar extension is located in the second recess, the second pawl piece connect in the front side of second collar extension, and incline to the interior backward from outer, the external diameter of second pawl piece is greater than the outer tube with the diameter of the hookup location department of inner tube.

In some embodiments of the present application, the outer tube is provided with an observation port penetrating through the inner side and the outer side of the outer tube, for observing the position of the pipe in the annular insertion groove.

In some embodiments of the present application, the outer tube further comprises an indicating ring slidably disposed on the inner wall of the outer tube, the indicating ring disposed in the annular insertion groove and axially located between the first clamping point and the inner opening of the viewing port.

A second object of the present application is to provide a tube taking device, comprising: the ejection part is connected to the end face of the sleeve part and used for being inserted into the annular insertion groove, so that the pipe can be taken out.

The utility model provides a connector and get a tub device, it inserts the annular groove of putting of establishing to inject formation confession tubular product through the cooperation of inner tube and outer tube, thereby connect tubular product, inwards extend on the ring through first elasticity claw, and from outer first pawl that inclines gradually backward to interior, and inwards extend on the elasticity tightening ring, and from outer pawl portion that inclines gradually backward to interior, with the tubular product joint in the current position, prevent it to deviate from, and can not influence tubular product and insert, tubular product can easily be taken out through getting a tub device simultaneously, the installation is dismantled conveniently, fixed effectual.

Drawings

FIG. 1 is a schematic view of the construction of the connection joint of the present embodiment;

FIG. 2 is a cross-sectional view of the connection joint of the present solution;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an exploded view of the connection joint of the present solution;

FIG. 5 is a schematic structural view of an outer tube base of the present solution;

FIG. 6 is a schematic structural view of the outer tube body of the present solution;

FIG. 7 is a schematic structural view of a first elastic claw ring of the present embodiment;

FIG. 8 is a schematic structural view of the tightening ring of the present solution;

FIG. 9 is a schematic structural view of the sleeve of the present solution;

FIG. 10 is a schematic structural view of a second elastic claw ring of the present embodiment;

FIG. 11 is a schematic structural view of an indicating ring of the present solution;

FIG. 12 is a schematic structural view of a tube taking device in the present embodiment;

FIG. 13 is a cross-sectional view of the connection joint of the present version at a first cannula depth;

FIG. 14 is a cross-sectional view of the connector of the present version at a second teahouse depth;

FIG. 15 is an enlarged view of portion B of FIG. 14;

FIG. 16 is a sectional view of the present embodiment of the pipe-taking apparatus in operation;

fig. 17 is an enlarged view of a portion C in fig. 16.

In the figure, 1, an inner tube; 11. a first groove; 12. a second groove; 2. an outer tube; 21. a snap ring; 22. a card slot; 23. a first tapered surface; 24. an outer tube seat; 25. an outer tube body; 26. a viewing port; 3. a first resilient claw ring; 31. a first mounting ring; 32. a first inverted tooth sheet; 33. a first chucking point; 4. an elastic tightening ring; 41. a second tapered surface; 42. a tooth chamfering part; 43. a second chucking point; 44. a tightening part; 441. tightening the ring; 442. a sleeve; 443. a first step; 444. a second step; 45. a positioning part; 5. an annular insertion groove; 6. a seal ring; 7. a second resilient claw ring; 71. a second mounting ring; 72. a second inverted tooth sheet; 8. an indicator ring; 9. a pipe taking device; 91. a push-out part; 92. a socket joint part.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", "top", "bottom", "circumferential", "center", and the like used herein indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the 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" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. It should be noted that, in this embodiment, the term "front" and "rear" means that the side close to the user is "front" and the side far from the user is "rear" when the device is installed.

As shown in fig. 1-4, 7 and 13-15, a connector fitting comprising: the clamping device comprises an inner pipe 1, an outer pipe 2, a first elastic claw ring 3 and an elastic tightening ring 4, wherein the outer pipe 2 is sleeved outside the inner pipe 1, the rear end of the outer pipe 2 is connected with the inner pipe 1, an annular insertion groove 5 is formed between the outer pipe 2 and the inner pipe 1, and the annular insertion groove 5 is open towards the front end;

a snap ring 21 is arranged on the inner wall of the outer tube 2, the first elastic claw ring 3 and the elastic tightening ring 4 are both arranged in the annular insertion groove 5, the elastic tightening ring 4 is arranged on the inner wall of the outer tube 2 and is positioned on the front side of the snap ring 21, and a snap groove 22 is defined between the rear side of the elastic tightening ring 4 and the front side of the snap ring 21;

the first elastic claw ring 3 comprises a first mounting ring 31 and a first inverted tooth piece 32 connected to the inner side of the first mounting ring 31, the first mounting ring 31 is matched and clamped in the clamping groove 22, the first inverted tooth piece 32 extends inwards and gradually inclines backwards from outside to inside, and the first inverted tooth piece 32 and the inner pipe 1 define a first clamping point 33;

be equipped with first conical surface 23 on the inner wall of outer tube, first conical surface 23 interval is located the front side of snap ring 21, first conical surface 23 from the past to back internal diameter crescent, elastic tightening ring 4 go up have with first conical surface 23 cooperation counterbalance second conical surface 41, elastic tightening ring 4's inner wall is equipped with pawl 42, pawl 42 inwards extends, and inclines gradually backward from outside to inside, pawl 42 with it forms second chucking point 43 to inject between the inner tube 1.

Based on the technical scheme, the outer pipe 2 is preferably connected to the middle position of the inner pipe 1, so that a front annular insertion groove 5 and a rear annular insertion groove 5 are defined and formed between the inner pipe 1 and the outer pipe 2, two pipes can be connected by inserting the two pipes into the two annular insertion grooves 5, the first elastic claw ring 3 is connected in an angled manner, preferably in a V-shaped manner, the shape of the snap ring 21 is matched with the shape of the first elastic claw ring 3, so that the first mounting ring 31 can be clamped on the clamping groove 22 defined between the snap ring 21 and the elastic tightening ring 4, the first inverted tooth piece 32 extends inwards and gradually inclines backwards from outside to inside, normal insertion of the pipes cannot be influenced, the first inverted tooth piece 32 partially extends into the mounting position and forms a first clamping point 33 by matching with the inner pipe 1, after the pipes are mounted in position, the first inverted tooth piece 32 generates a certain holding force on the pipes, when the pipes are subjected to a pulling force towards the pipe opening, the first back-teeth 32 can prevent the pipe from falling out. Preferably, the first inverted tooth sheet 32 is composed of a plurality of inverted tooth sheets which are uniformly distributed at intervals in the circumferential direction, is light in weight and is not easy to damage; the first elastic claw ring 3 is preferably made of a high-strength metal sheet material support with good elasticity, and is high in strength and strong in deformability. The elastic tightening ring 4 is abutted on the first mounting ring 31, when the first elastic claw ring 3 is pulled towards the pipe orifice, the first inverted tooth piece 32 drives the first mounting ring 31 to move axially towards the pipe orifice, so as to provide axial force to the elastic tightening ring 4, because the outer wall of the elastic tightening ring 4 is provided with the inclined second tapered surface 41 and is matched and abutted with the first tapered surface 23 of the inner wall of the outer pipe 2, the elastic tightening ring 4 can be extruded inwards after being subjected to the axial force, because the inner wall of the sleeve 442 is provided with the inverted tooth part 42 extending backwards and inwards in an inclined manner, a second clamping point 43 is limited and formed between the inverted tooth part 42 and the inner pipe 1, when the inverted tooth part 42 is abutted on the pipe, a force can be applied to the pipe again, the pipe is prevented from being separated, and the multiple separation prevention effect is realized. When the pipe is installed, the pipe is only required to be inserted into the annular insertion groove 5, and the installation is very convenient.

In some embodiments of the present application, as shown in fig. 2 and 3, the elastic tightening ring 4 includes a tightening portion 44 and a positioning portion 45, the tightening portion 44 abuts against a front side of the positioning portion 45, the second tapered surface 41 is disposed on an outer wall of the tightening portion 44, the positioning portion 45 and the snap ring 21 define the snap groove 22 therebetween, and the inverted tooth portion 42 is disposed on an inner wall of the tightening portion 44. Because the elastic tightening ring 4 is contracted to clamp the pipe after being subjected to the axial force, the problems of axial force and radial contraction need to be considered, the integral elastic tightening ring 4 is difficult to contract in the radial direction, the elastic tightening ring 4 can be divided into two parts, the positioning part 45 is used for limiting the snap ring 21 to form a snap groove 22 for the first elastic claw ring 3 to be installed, and bear the axial force, the positioning part 45 can be made of inelastic material, the force transmission effect is better and no deformation is caused, and the positioning portion 45 is preferably a full circle capable of being correspondingly fitted with the first mounting ring 31 for receiving the axial force given by the first mounting ring 31, the outer periphery of the positioning portion 45 is provided with a raised ring extending axially rearward, the protruding ring and the snap ring 21 define a snap groove 22, so that the axial tension that the first elastic claw ring 3 can bear is increased, and the first elastic claw ring 3 is prevented from failing due to stress yield deformation. The tightening part 44 receives the axial force transmitted from the positioning part 45, the second taper surface 41 abuts against the first taper surface 23 on the inner side of the outer tube 2, and the axial force is converted into a radial component force, so that the tightening part 44 is limited, the inverted tooth part 42 is clamped on the tube to prevent the tube from being pulled out, the tightening part 44 is preferably provided with a gap part, the inward tightening range of the tightening part 44 after the radial force is applied is larger, and the inverted tooth part 42 is more favorably clamped on the tube.

Specifically, as shown in fig. 2, 3, 8, and 9, the tightening part 44 includes a tightening ring 441 and a sleeve 442 provided inside the tightening ring 441, an inner wall of the tightening ring 441 is connected to an outer wall of the sleeve 442, the tightening ring 441 abuts against a front side of the positioning part 45, and the inverted tooth part 42 is provided on the inner wall of the sleeve 442. The tightening part 44 is divided into two parts, the tightening part and the positioning part 45 are added together to form three parts, deformation and stress are facilitated after splitting, the tightening ring 441 radially contracts and abuts against the outer wall of the sleeve 442, the sleeve 442 contracts radially at the same time, the inverted tooth part 42 clamps the pipe, the tightening ring 441 is preferably provided with a through notch part, the front end of the sleeve 442 is preferably provided with a notch part, the rear end of the sleeve 442 is communicated circumferentially, the through notch part on the tightening ring 441 ensures that the tightening ring 441 deforms more greatly, the clamping effect is good, the notch parts of the sleeve 442 are communicated, and the sleeve 442 is deformed and has strength.

More specifically, as shown in fig. 2, 3, 8, and 9, a rear end surface of the sleeve 442 is disposed adjacent to a front side of the first inverted tooth blade 32, the tightening ring 441 is provided with a first step 443, and the sleeve 442 is provided with a second step 444 axially engaged with the first step 443 for limiting the sleeve 442 from moving toward the nozzle. When the pipe receives a large releasing force, the first elastic claw ring 3 deforms greatly, the first inverted tooth piece 32 abuts against the rear end face of the sleeve 442, the rigidity of the first inverted tooth piece 32 is increased, meanwhile, an axial force is applied to the sleeve 442, the sleeve 442 moves towards the pipe opening, the axial force is transmitted to the tightening ring 441 through step matching, the inverted tooth portions 42 on the tightening ring 441 can hold the pipe tightly, and the releasing prevention effect is further improved.

In some embodiments of the present application, as shown in fig. 2 to 6, the outer tube 2 includes an outer tube seat 24 and an outer tube body 25, the outer tube seat 24 is sleeved on the outer side of the inner tube 1, the outer tube body 25 is connected on the outer side of the outer tube seat 24, the snap ring 21 is disposed on the front side of the outer tube seat 24 and located on the inner side of the outer tube body 25, and the first tapered surface 23 is disposed on the inner wall of the outer tube body 25. Outer tube seat 24 and outer tube body 25 can adopt modes such as interference fit, threaded connection, cooperation joint to be connected, preferably adopts threaded connection's mode between outer tube seat 24 and the outer tube body 25, and excellent in connection effect and easy to process are equipped with the external screw thread on the periphery wall face of outer tube seat 24, are equipped with the internal thread on the internal perisporium face of outer tube body 25, and internal and external screw thread is turned round tight fixedly. And, be equipped with the cooperation on outer tube body 25 and the outer tube seat 24 and prevent the joint structure of anti-pine, preferably, the tip inboard of outer tube body 25 is equipped with the little arch of slope to outer tube seat 24 is equipped with the little arch of complex with the corresponding position of outer tube body 25 equally, and outer tube body 25 is turned round tightly on outer tube seat 24, makes the little protruding interference fit of two parts, and the little arch that the slope set up can prevent that the screw-thread fit of outer tube body 25 and outer tube seat 24 is anti-pine and is deviate from.

In some embodiments of the present application, as shown in fig. 2, the inner tube further includes a sealing ring 6, a first groove 11 is formed on an outer wall of the inner tube 1, and the sealing ring 6 is disposed in the first groove 11. The sealing ring 6 is arranged on the peripheral wall surface, is preferably made of rubber, can play a role in sealing, prevents fluid from entering between the inner pipe 1 and the outer pipe 2 from a gap between the pipe and the inner pipe 1, can improve the friction force between the pipe and the inner pipe 1, and further improves the mounting and fixing effects. The sealing ring 6 is preferably arranged to be partly arranged in the mounting position when no pipe is mounted, and the pipe is squeezed when the pipe is inserted, so that the sealing ring 6 is deformed and pressed into the first groove 11, and the sealing and fixing effect is better.

In some embodiments of the present application, as shown in fig. 2 and 10, the elastic claw ring 7 further includes a second elastic claw ring 7, the second elastic claw ring 7 includes a second mounting ring 71 and a second inverted tooth piece 72, a second groove 12 is provided on the outer circumferential wall surface of the inner tube 1, the second mounting ring 71 is provided in the second groove 12, the second inverted tooth piece 72 is connected to the front side of the second mounting ring 71 and is inclined from outside to inside, and the outer diameter of the second inverted tooth piece 72 is greater than the diameter of the outer tube 2 and the inner tube 1 at the connection position. The second elasticity claw ring 7 is connected at an angle, preferably is "V" type connection, and second collar 71 cooperation is installed in second recess 12, and second pawl 72 is equipped with a plurality of second pawl 72 along the radial evenly distributed of second collar 71, and the external diameter of second pawl 72 is greater than the diameter that outer tube 2 and inner tube 1 hookup location department and can carries out axial spacingly to outer tube 2, prevents that outer tube 2 axial from deviating from. The second elastic claw ring 7 is preferably provided with a notch portion, so that the second elastic claw ring 7 can be more conveniently snapped into the second groove 12. The second elastic claw ring 7 is preferably made of metal sheet metal material with high strength and good elasticity, and has high strength and strong deformability.

In some embodiments of the present application, as shown in fig. 2 and 5, the outer tube 2 is provided with a viewing port 26 penetrating the inner side and the outer side of the outer tube 2 for viewing the position of the pipe in the annular insertion groove 5. The viewing port 26 can be used to view the position of the tubular in the annular insertion groove 5 to facilitate confirmation that the tubular is in place.

Specifically, as shown in fig. 2, 11, 13 and 14, the indicator ring 8 is slidably disposed on the inner wall of the outer tube 2, and the indicator ring 8 is disposed in the annular insertion groove 5 and is axially located between the first clamping point 33 and the inner opening of the observation port 26. The excircle of the indicating ring 8 is provided with small bulges which are uniformly distributed, the diameters of the small bulges are slightly larger than the diameter of the inner wall of the outer pipe 2, so that the indicating ring 8 is prevented from sliding out in the transportation or storage process of the pipe fitting by interference fit. After the pipe is inserted into the annular insertion groove 5, the pipe abuts against the indicating ring 8 and pushes the indicating ring 8 to move backwards, and when the end face of the pipe pushes the indicating ring 8 to the rear end of the annular insertion groove 5 and can be seen through the observation port 26, the installation is completed.

The installation process of this application does: firstly, the sealing ring 6 and the second elastic claw ring 7 are respectively sleeved on the first groove 11 and the second groove 12 of the inner tube 1, then the indicating ring 8 is installed on the inner wall of the outer tube seat 24, the installation position is close to the snap ring 21, the first elastic claw ring 3 is clamped on the snap ring 21, then the positioning part 45 is attached to the first installation ring 31, the tightening ring 441 is sleeved on the periphery of the sleeve 442, the combined body of the tightening ring and the sleeve 442, namely the tightening part 44 is axially close to the front side of the positioning part 45, the tightening ring 441 is abutted to the positioning part 45, finally the outer tube body 25 is circumferentially sleeved on the tightening part 44 and is screwed with the outer tube seat 24, and the assembly is completed.

As shown in fig. 12, 16 and 17, a second object of the present application is to provide a tube taking device 9, comprising: the ejection part 91 is connected to the end face of the sleeve part 92, and the ejection part 91 is used for being inserted into the annular insertion groove 5 as described above, so as to take out the pipe. The ejection part 91 extends into the annular insertion groove 5 and abuts against the front end of the elastic tightening ring 4, the elastic tightening ring 4 moves axially backwards, the first elastic claw ring 3 abuts against the clamping ring 21, connection between the connecting joint and the pipe is loosened, the pipe can be taken out at the moment, and after the ejection part 91 leaves the annular insertion groove 5, the first clamping point 33 and the second clamping point 43 reset and can be repeatedly used. Get tub device 9 preferred elastic material, and the preferred annular structure that slightly is greater than the semicircle of shape, will get the opening card of tub device 9 on tubular product, exert oneself slightly can get tub device 9 joint on tubular product, it is convenient to use.

The dismounting process of the application is as follows: the pipe taking device 9 is sleeved on the pipe, the ejection part 91 faces the rear side of the annular insertion groove 5, the sleeve part 92 is held and axially applied with force to enable the pipe taking device 9 to axially displace, the ejection part 91 abuts against the front side end face of the sleeve 442, the sleeve 442 is pushed towards the rear side with force, the rear side end face of the sleeve 442 abuts against the first inverted tooth piece 32 of the first elastic claw ring 3, the first inverted tooth piece 32 deforms, at the moment, the first clamping point 33 and the second clamping point 43 have no clamping effect, the pipe can be easily axially taken out, after the pipe taking device 9 is loosened, the first inverted tooth piece 32 of the first elastic claw ring 3 resets to the initial free state size due to the elasticity of the first inverted tooth piece 32, and the pipe taking device can be repeatedly installed and used. The whole installation and disassembly process does not need professional staff and other special installation tools, the operation is simple, the time and the labor are saved, the installation cost can be saved, the installation and the use can be repeated, and the environment is protected.

In conclusion, the attach fitting of this application and get a tub device 9, the cooperation through inner tube 1 and outer tube 2 is injectd to form and is supplied tubular product to insert the annular of establishing and insert and put groove 5, thereby connect tubular product, inwards extend on first elasticity claw ring 3, and from the first pawl 32 that outwards inwards inclines gradually to the inside, and elasticity tighten up ring 4 upwards inwards extend, and from the pawl portion 42 that outwards inwards inclines gradually to the inside, with the tubular product joint in current position, prevent it to deviate from, and can not influence tubular product and insert, tubular product can easily be taken out through getting tub device 9 simultaneously, the installation is dismantled conveniently, fixed effectual.

The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and substitutions can be made without departing from the technical principle of the present application, and these modifications and substitutions should also be regarded as the protection scope of the present application.

Claims (10)

1. A connection fitting, comprising: the elastic tightening device comprises an inner pipe, an outer pipe, a first elastic claw ring and an elastic tightening ring, wherein the outer pipe is sleeved outside the inner pipe, the rear end of the outer pipe is connected with the inner pipe, an annular insertion groove is formed between the outer pipe and the inner pipe, and the annular insertion groove is open towards the front end;

the inner wall of the outer pipe is provided with a clamping ring, the first elastic claw ring and the elastic tightening ring are both arranged in the annular insertion groove, the elastic tightening ring is arranged on the inner wall of the outer pipe and is positioned on the front side of the clamping ring, and a clamping groove is limited between the rear side of the elastic tightening ring and the front side of the clamping ring;

the first elastic claw ring comprises a first mounting ring and a first inverted tooth sheet connected to the inner side of the first mounting ring, the first mounting ring is matched and clamped in the clamping groove, the first inverted tooth sheet extends inwards and gradually inclines backwards from outside to inside, and the first inverted tooth sheet and the inner pipe are limited to form a first clamping point;

be equipped with first conical surface on the inner wall of outer tube, first conical surface interval is located the front side of snap ring, first conical surface from the past to back internal diameter crescent, elasticity tighten up have on the ring with the second conical surface that first conical surface cooperation offseted, the inner wall of elasticity tighten up ring is equipped with pawl portion, pawl portion inwards extends, and inclines gradually backward from outer to interior, pawl portion with inject between the inner tube and form the second chucking point.

2. The connection joint according to claim 1, wherein the elastic tightening ring includes a tightening portion and a positioning portion, the tightening portion abuts against a front side of the positioning portion, the second tapered surface is provided on an outer wall of the tightening portion, the positioning portion and the snap ring define therebetween the snap groove, and the inverted tooth portion is provided on an inner wall of the tightening portion.

3. The connector according to claim 2, wherein the tightening portion includes a tightening ring and a sleeve disposed inside the tightening ring, an inner wall of the tightening ring is connected to an outer wall of the sleeve, the tightening ring abuts against a front side of the positioning portion, and the pawl portion is disposed on the inner wall of the sleeve.

4. The connector according to claim 3, wherein the rear end face of the sleeve is arranged close to the front side of the first inverted tooth piece, the tightening ring is provided with a first step, and the sleeve is provided with a second step axially matched and clamped with the first step for limiting the sleeve to move towards the pipe orifice.

5. The connector of claim 1, wherein the outer tube includes an outer tube seat and an outer tube body, the outer tube seat is disposed on an outer side of the inner tube, the outer tube body is connected to an outer side of the outer tube seat, the snap ring is disposed on a front side of the outer tube seat and located on an inner side of the outer tube body, and the first tapered surface is disposed on an inner wall of the outer tube body.

6. The connector of claim 1, further comprising a sealing ring, wherein a first groove is formed in an outer wall of the inner pipe, and the sealing ring is disposed in the first groove.

7. The connector according to claim 1, further comprising a second elastic claw ring, wherein the second elastic claw ring comprises a second mounting ring and a second inverted tooth piece, a second groove is formed in the outer circumferential wall surface of the inner pipe, the second mounting ring is arranged in the second groove, the second inverted tooth piece is connected to the front side of the second mounting ring and is inclined backward from outside to inside, and the outer diameter of the second inverted tooth piece is larger than the diameter of the outer pipe at the connecting position of the inner pipe and the outer pipe.

8. The connector fitting according to claim 1, wherein the outer tube is provided with viewing ports penetrating inside and outside of the outer tube for viewing the position of the pipe in the annular insertion groove.

9. The connection fitting of claim 8, further comprising an indicator ring slidably disposed on an inner wall of said outer tube, said indicator ring disposed in said annular insertion groove and axially between said first gripping point and an inside opening of said viewing port.

10. A tube taking device is characterized by comprising: the pipe fitting comprises an ejection part and a sleeve part, wherein the ejection part is connected to the end face of the sleeve part and is used for being inserted into the annular insertion groove according to any one of claims 1 to 9 so as to take out a pipe.

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