CN115614579A - Pipeline connector - Google Patents

Abstract

The application discloses a pipeline connector. The line connector is adapted to connect with a pipe plug having a tapered flange. The pipe connector includes: a housing defining an accommodation space, two locking channels being formed on the housing and extending transversely through the accommodation space; the locking piece comprises two clamping legs and two locking legs corresponding to the two clamping legs; the two clamping legs and the two locking legs are adapted to fit into the respective locking channels; push parts extending toward one another are formed on the two locking legs, the rear sides of the push parts being formed as flat surfaces. After the pipe plug is inserted into the accommodating space, the flange pushes the pushing part forwards to enable the locking leg to be displaced forwards at least along the insertion direction; the flange then spreads the two locking legs radially outwardly to pass between the two locking legs, while the locking legs and the clamping legs move in the respective locking channels until the locking legs snap into engagement with the housing, and the locking piece abuts against the rear side of the flange to lock the pipe plug.

Description

Pipeline connector

Technical Field

The application relates to the field of pipe joints, in particular to a pipeline connector.

Background

In automotive pipelines, connectors are widely used to meet the connection requirements of the pipelines. For example, a pipe plug connected to a pipe is inserted into the connector to achieve connection of the pipe.

In the prior art, a pipe connector typically includes a lock for mating a housing of a pipe plug with the housing. The locking element has two limbs, two transversely extending channels being formed on the housing, which channels match the two limbs. During assembly, the pipe plug is inserted axially forward into the housing, through the gap between the two branches and drives the locking piece to automatically drop lock to stably connect the pipe plug with the pipe connector. Both branches of the locking element are configured with guide ramps to facilitate the axial forward insertion of the pipe plug. However, when the flange of the pipe plug is tapered, the locker cannot be smoothly automatically locked.

Disclosure of Invention

In view of the above technical problem, the present application provides a pipeline connector. The line connector is adapted to connect with a pipe plug having a tapered flange. The pipe connector includes: a housing which defines an accommodation space and on which two locking channels are formed, which extend transversely through the accommodation space and are spaced apart from one another in a cross section of the housing; the locking piece comprises two clamping legs and two locking legs corresponding to the two clamping legs; the two clamping legs and the two locking legs are adapted to fit into the respective locking channels; on both locking legs, push portions are configured which extend towards each other, the rear sides of which are configured as flat faces adapted to cooperate with the flanges; the pipe connector is configured such that, after the pipe plug is inserted into the accommodation space, the flange pushes the push portion forward to displace at least the locking leg forward in the insertion direction; the flange then spreads the two locking legs radially outwardly through between them, while the locking legs and the clamping legs move in the respective locking channels until the locking legs snap into engagement with the housing, the locking piece abutting against the rear side of the flange to lock the pipe plug.

In one embodiment, the two clamping legs are at the rear side of the respective locking leg and are configured with a forwardly extending projection adapted to abut against the rear of the large end of the tapered flange to lock the pipe plug.

In one embodiment, the flange is at the front end of the pipe plug.

In one embodiment, the flange is in the middle of the pipe plug.

In one embodiment, the pipe plug further comprises a clamping section extending rearwardly from the large end of the flange, the clamping section having a diameter smaller than the diameter of the large end of the flange to form a step therebetween; the clamping legs are adapted to engage the snap segments and the projections are adapted to abut the steps to lock the pipe plug.

In one embodiment, the pipe plug further comprises a stopper extending radially outward from a circumferential outer wall of the clamping section, the stopper being spaced apart from the flange in an axial direction of the clamping section; after the pipe plug is inserted into the accommodating space, the transverse end face of the shell is abutted to the blocking body.

In one embodiment, the projections extend forwardly in front of the respective locking legs.

In one embodiment, the locking leg includes a first extension and a second extension extending from the first extension; the two second extending parts are suitable for elastic deformation; the two protrusions respectively correspond to the corresponding first extension parts and are positioned between the two first extension parts.

In one embodiment, the push portion is between the first extension and the second extension.

In one embodiment, the two urging portions comprise arcuate faces projecting towards each other, the arcuate faces extending along the length of the locking leg.

In one embodiment, a first sealing ring is arranged in the accommodating space; the first seal ring includes a cylindrical body and an annular seal lip connected to the cylindrical body and extending toward the interior of the cylindrical body.

In one embodiment, the sealing lip is inclined towards the insertion direction.

In one embodiment, a guide tube is formed within the receiving space.

In one embodiment, two lateral openings are formed in the side wall of the guide tube, which correspond to the two locking channels, respectively; the two clamping legs fit into the respective locking channels through the respective transverse openings.

In one embodiment, the end of the guide tube is provided with a second sealing ring.

Compared with the prior art, the beneficial effects of this application are as follows: in the pipe connector of the present application, the rear side face of the pushing portion is a flat face. In the assembling process, the conical flange can sufficiently exert the forward axial pushing force on the pushing part, and the flange and the pushing part are not easy to slide relatively, so that the aim that the locking piece can smoothly and freely fall down under the condition that the flange of the pipe plug is conical is fulfilled.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1a schematically shows an overall view of a pipe connector according to an embodiment of the present application.

Fig. 1b schematically shows an exploded view of a tube connector according to an embodiment of the present application.

FIG. 2 schematically illustrates a schematic view of a pipe connector assembled with a pipe plug according to one embodiment of the present application.

Fig. 3 schematically shows the structure of the pipe plug.

Fig. 4a schematically shows the structure of the housing in a first view.

Fig. 4b schematically shows the structure of the housing in a second view.

Fig. 5 schematically shows the structure of the locking member.

Fig. 6 schematically shows an axial cross-sectional view of the first seal ring.

Fig. 7 schematically shows the structure of the gasket.

Fig. 8 is a cross-sectional view of the first angle of fig. 2.

Fig. 9a and 9b schematically show the positional relationship of the locking member with the pipe connector in the initial state.

Fig. 10 schematically illustrates the positional relationship of the locking member to the line connector when the pipe plug and the line connector are assembled together.

Fig. 11 is a second angled cross-sectional view of fig. 2.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the present application, the axial direction of a cylindrical or annular component refers to a direction parallel to the central axis of the component (as indicated by the dashed line B in fig. 1B); the circumferential direction of a cylindrical or annular member refers to the direction along the circumference of the member; the radial direction of the cylindrical or annular member refers to a direction passing through the central axis of the member and perpendicular to the axial direction of the member; the transverse direction of a cylindrical or annular component refers to a direction substantially perpendicular to the axial direction of the component (as indicated by the dashed line T in fig. 1 b). In addition, in the present application, the directional term "front" refers to a direction in which the pipe joint is inserted into the receiving space, as indicated by an arrow a in fig. 8; the directional term "rear" refers to a direction opposite to "front". The directional term "lower" refers to the direction of extension of the locking leg 302 (as indicated by arrow C in fig. 5); the directional term "upper" refers to a direction opposite to "lower".

Fig. 1a schematically shows a pipe connector 1 according to an embodiment of the present application. Fig. 1b is an exploded view of the tube connector 1. The pipe connector 1 is adapted to be connected to a pipe plug 20 (shown in fig. 3) with a tapered flange 203. As shown in fig. 1a and 1b, the pipe connector 1 includes a housing 103 and a locking piece 30 movably fitted on the housing 103. As also shown in fig. 4a, the housing 103 defines an accommodating space 105. Two locking channels 102 are formed on the housing 103, the two locking channels 102 extending transversely through the receiving space 105 and being spaced apart from one another in the cross section of the housing 103. As further shown in fig. 5, the locking member 30 includes two clamping legs 304 and two locking legs 302 corresponding to the two clamping legs 304. The clamping legs 304 and the locking legs 302 are adapted to fit into the corresponding locking channels 102. On both locking legs 302, push portions 310 are configured extending towards each other, the rear side of the push portions 310 being configured as a plane adapted for cooperation with the flange 203. The tube connector is configured such that, upon insertion of the tube plug 20 into the receiving space 105, the flange 203 pushes the push portion 310 forward to displace at least the locking leg 302 forward in the insertion direction. The flange 203 then spreads the two locking legs 302 radially outwardly to pass between the two locking legs 302, while the locking legs 302 and the clamping legs 304 move within the respective locking channels 102 until the locking legs 302 snap into engagement with the housing 103 and the locking member 30 abuts the rear side of the flange 203 to lock the pipe plug 20.

In the pipe connector 1 of the present application, the rear side face of the pushing portion 310 is a flat face. During assembly, the tapered flange 203 can exert an axially forward urging force on the urging portion 30 sufficiently to urge at least the locking leg 304 (or the locking member 30) axially forward to a position where the locking leg 304 can be radially spread by the flange 203, and the locking member 30 can smoothly freely fall. The phenomenon that the locking member 30 is not easily moved axially forward due to relative sliding between the tapered flange 203 and the pushing portion 30 does not easily occur. Thus, the pipe connector 1 of the present application achieves the object that the locking piece 30 can smoothly freely fall and be locked in the case where the flange 203 of the tube plug 20 is tapered by configuring the rear side surface of the pushing portion 310 to be a flat surface.

Optionally, as shown in FIG. 3, a flange 203 is at the front end of the pipe plug 20. In further embodiments, the flange 203 may also be at the middle of the pipe plug 20.

Optionally, two clamping legs 304 are provided on the rear side of the respective locking leg 302 and are configured with a projection 320 extending forward in the plugging direction. The projection 320 is adapted to abut against the rear of the large end of the tapered flange 203 to lock the pipe plug 20.

Optionally, the pipe plug 20 further includes a snap section 204 extending rearwardly from the large end of the flange 203, the snap section 204 having a diameter smaller than the diameter of the large end of the flange 203 to form a step 205 therebetween. The gripping legs 304 are adapted to engage the snap-in section 204 and the projections 320 are adapted to abut the steps 205 to lock the pipe plug 20. For example, after inserting the pipe plug 20 into the receiving space 105 through the gap between the two protrusions 320, the locking legs 302 and the clamping legs 304 move within the respective locking channels 102 until the locking legs 302 snap into the housing 103, the clamping legs 304 engage the snap section 204 and the two protrusions 320 abut the step 205 (as shown in fig. 11) to lock the pipe plug 20. Thus, the protrusion 320 blocks the tube plug 20 from moving axially backward, thereby maintaining the tube plug 20 connected to the tube connector 1. Even in the case where the length of the tube plug 20 is short, the projection 320 may abut against the step 205, thereby keeping the tube plug 20 connected to the tube connector 1. In addition, since the locking legs 302 snap together with the housing 103, this avoids the risk of accidentally removing the locking member 30 from the locking channel 102. Thereby, the locking piece 30 and the tube plug 20 are locked to each other, so that the tube plug 20 and the tube connector 1 are not easily separated.

Optionally, the shape of the flange 203 may also be substantially truncated cone. Such a flange 203 also serves a guiding function when the pipe plug 20 is inserted into the housing 103.

Optionally, as also shown in fig. 3 and 11, the pipe plug 20 further includes a stop 210 extending radially outwardly from the circumferential outer wall of the clamping segment 204. The stop 210 is spaced from the flange 203 in the axial direction of the snap-fit section 205. After the pipe plug 20 is inserted into the accommodation space 105, the axial end surface 106 of the housing 103 abuts against the stopper 210 (as shown in fig. 2 and 8). Thus, the housing 103 will prevent the stopper 210 from moving axially forward. Thus, both the housing 103 and the protrusion 320 prevent both the axial forward movement and the axial rearward movement of the stinger 20, i.e., the stinger 20 cannot axially shift, which makes the stinger 20 more stable to install.

Alternatively, the stopper 210 may be configured in a flange shape, or may be configured in another shape as long as it can abut against the axial end surface 106 of the housing 103.

Optionally, the protrusions 320 extend forward to the front of the respective locking leg 302. In a particular embodiment, the difference between the length that the protrusion 320 extends forward and the length that the locking leg 302 extends forward is between 3mm and 6 mm. In this way, the axial dimension of the locking member 30 does not become significantly large, which also contributes to downsizing of the pipe connector 1.

Optionally, as shown in fig. 5, the locking leg 302 includes a first extension 308 and a second extension 309 extending from the first extension 308. The two second extensions 309 are adapted to be elastically deformed. The two protrusions 320 correspond to the respective first extension portions 308 and are located between the two first extension portions 308. According to this structure, the two protrusions 320 do not hinder the two second extensions 309 from being elastically deformed toward each other. This facilitates the two locking legs 302 to be elastically deformed by being pressed toward each other with smooth movement in the corresponding locking channel 102.

Optionally, the clamping leg 304 also corresponds only to the first extension 308, e.g., the length of the clamping leg 304 is less than or equal to the length of the first extension 308. In this way, it is ensured that the projection 320 does not influence the elastic deformation of the two locking legs 302 towards each other. It should be noted that the gap between the two clamping legs 304 forms the engagement channel 303, as shown in fig. 5. The pipe plug 20 has a shape that fits the shape of the joining channel 303 so as to be able to pass through the joining channel 303.

As also shown in fig. 5, the push portion 310 is between the first extension 308 and the corresponding second extension 309. As previously described, the two pushing portions 310 extend toward each other and are adapted to receive an external force in the insertion direction (e.g., an axially forward pushing force applied by the flange 203 of the pipe plug 20) to displace at least the second extension 309 (or the locking member 30) forward in the insertion direction. For example, the distance between the two pushing portions 310 is smaller than the radial dimension of the spigot 20 before the spigot 20 is assembled. Upon insertion of the pipe plug 20, the pipe plug 20 pushes the locking member 30 forward in the insertion direction until the two locking legs 302 abut against the side walls of the respective locking channel 102. Subsequently, the pipe plug 20 forces the two locking legs 302 to spread radially outward and pass between the two locking legs 302, while pushing the two pushing portions 310 downward drives the entire locking member 30 to move downward until the locking legs 302 snap into the housing 103, the clamping legs 304 straddle the snap section 204, and the two protrusions 320 abut against the step 205, thereby achieving locking of the locking member 30 with the pipe plug 20. (this will be explained in detail below).

As also shown in fig. 5, the two pushers 310 include arcuate surfaces 312 that project toward each other, the arcuate surfaces 312 extending along the length of the locking leg 302. In this configuration, the arcuate surface 312 has a relatively large dimension along the length of the locking leg 302 (as indicated by arrow C in fig. 5), and the arcuate surface 312 is generally rectangular in profile as a whole, rather than having a convex tip as in the prior art. During insertion of the pipe spigot 20, the prior art nose-shaped push portion can rigidly collide with the pipe spigot and damage the locking legs or even cause the locking legs to break. However, the arcuate face 312 of the pusher 310 of the present application will slide smoothly along the flange 203, avoiding damage to the locking leg 302.

Optionally, the locking member 30 further comprises a connecting portion 301. Both locking legs 302 and both clamping legs 304 are connected to the connecting portion 301 to form one piece, which facilitates the operation of the locking member 30.

Alternatively, as shown in fig. 1b and 4a, a guide tube 104 is formed in the accommodating space 105. When the pipe plug 20 is inserted into the receiving space 105, the guide pipe 104 is inserted into the flow passage 202 of the pipe plug 20. In this way, the guide tube 104 supports the pipe connector 20, making the connection with the pipe connector 20 more stable. In addition, the housing 103 also protects and limits the position of the pin plug 20. In this way, the connection of the pipe connector 1 to the pipe plug 20 is made to have good stability even in the case where the axial dimensions of the housing 103 and the pipe plug 20 are both small. The guide tube 104 may also guide the assembly of the pipe plug 20 to facilitate a user in quickly and accurately assembling the pipe plug 20 into the housing 103.

It will be appreciated that the housing 103 also includes a conduit 107 in communication with the guide tube 104. Thus, the flow passage 202 and the conduit 107 form a fluid passage therethrough when the meatus plug 20 is assembled with the housing 103. As also shown in fig. 1, the conduit 107 is an elbow, which further reduces the axial extension of the pipeline connector 1 to facilitate installation of the pipeline connector 1 into a smaller space.

As is also shown in fig. 4a, two transverse openings 108 are formed in the side wall of the guide tube 104, which transverse openings 108 correspond to the two locking channels 102, respectively, and the two clamping legs 204 fit through the respective transverse openings 108 into the respective locking channels 102. In this configuration, the transverse opening 108 is part of the locking channel 102, which helps to reduce the radial size of the tube connector 1 to facilitate use of the tube connector 1 in a less spacious environment. In addition, upon installation of the pipe plug 20 and locking members 30, the pipe plug 20 covers the transverse opening 108 and the two clamping legs 304 fit into the corresponding locking channels 102 holding the clamping segments 204 of the pipe plug 20.

As also shown in fig. 6 and 8, a first seal ring 109 is provided in the accommodation space 105. The first seal ring 109 includes a cylindrical body 110 and an annular seal lip 111 connected to the cylindrical body 110 and extending toward the inside of the cylindrical body 110. In the assembled state, the cylindrical body 110 is attached to the housing 103. The flange 203 of the spigot 20 is inserted into the cylindrical body 110 and is in sealing contact with the seal lip 111. Thus, after the pipe plug 20 is fitted into the pipe joint 1, a storage space 112 is formed between the radially inner side of the first seal ring 109, the radially outer side of the flange 203, and the housing 103. The storage space 112 may be used to store fluid that seeps through the gap between the stinger 20 and the guide tube 104. Since the radial dimension of the flange 203 is gradually increased in the rearward direction, the pressure of the fluid in the storage space 112 acting on the seal lip 111 further enhances the sealing effect of the seal lip 111 with the flange 203, so that the fluid can be further prevented from leaking to the outside environment. It is not necessary to provide a plurality of sealing rings in the accommodating space 105. This also contributes to reducing the axial size of the pipe connector 1, making the structure of the pipe connector 1 more compact.

As also shown in fig. 6, the sealing lip 111 is inclined toward the insertion direction. The first sealing ring 109 as a whole generally forms a V-shaped sealing ring. This reduces the resistance to forward insertion of the spigot 20 past the first sealing ring 109, facilitating handling by the user. In addition, the sealing lip of the V-shaped seal ring has a better sealing effect with the flange 203, particularly in the case where the pressure in the storage space 112 rises within a certain range. V-seals are well known to those skilled in the art and will not be described in detail herein.

In order to stably mount the first seal ring 109 in the housing 103, a gasket 113 is also provided in the accommodation space 105. As shown in fig. 7 and 8, the spacer 113 includes a ring body 114 and a press leg 115 extending from the ring body 114 in the insertion direction of the pipe plug 30 and offset from the two locking channels 102. After the pipe plug 20 is assembled with the pipe connector 1, the stopper 210 presses the ring body 114 to seal a gap between the stopper 210 and the housing 103; the clamping legs 304 and/or the locking legs 302 of the locking member 30 also abut against the washer 113, so that the pipe plug 20 and the locking member 30 achieve a limit in the axial direction for the washer 113. The press leg 115 extends to abut the first seal ring 109, thereby stably retaining the first seal ring 109 within the housing 103. It will be appreciated that where the first seal ring 109 includes the cylindrical body 110 and the sealing lip 111, the leg 115 bears against the end of the cylindrical body 110.

Optionally, the gasket 113 includes two diametrically opposed press legs 115 (shown in FIG. 7). Thus, the first sealing ring 109 is stressed evenly and is installed more stably. In other embodiments, more press legs 115 may be provided, and the plurality of press legs 115 are evenly distributed along the circumferential direction and are offset from the two locking channels 102.

Optionally, a second sealing ring (not shown) is provided on the guide tube 104. For example, a second sealing ring is provided at the end of the guide tube 104. Thereby, the gap between the guide tube 104 and the pipe plug 20 is sealed to prevent fluid from leaking from the gap between the guide tube 104 and the pipe plug 20.

The assembling process of the pipe connector 1 and the pipe plug 20 will be described below.

As shown in fig. 9a and 9b, the two locking legs 302 of the locking member 30 are inserted into the respective locking channels 102. The lower end of the locking leg 302 abuts the catch member 101 formed in the locking channel 102 (as shown in fig. 9 b). At this time, the locking member 30 is in an initial state.

As shown in fig. 9a, in this initial state, the center O1 of the engagement passage 303 between the two clamping legs 304 is above the center O2 of the accommodation space 105 (or the guide tube 104), and the distance between the pushing portions 310 on the two locking legs 302 is smaller than the radial dimension of the flange 203 of the tube plug 20.

Then, as the pipe plug 20 is inserted into the accommodation space 105, the pushing portion 310 receives a forward pushing force applied by the flange 203 of the pipe plug 20, so that the locking member 30 is pushed axially forward by the pipe plug 20 until the locking legs 302 come into contact with the side wall of the locking passage 102. The flange 203 of the spigot 20 continues to apply a forward pushing force to the pushing portion 310, causing the two locking legs 302 to resiliently spread apart radially outwardly and disengage from the catch member 101. Thus, the pipe plug 20 passes between the two locking legs 302. At the same time, the flange 203 of the pipe plug 20 applies a downward pushing force to the two pushing parts 310 so that the locking member 30 is moved downward as a whole; during this time, the two pushing portions 310 move down along the tapered surfaces of the flanges 203, and the locking leg 302 also moves down over the catch member 101.

Finally, the locking member 30 is moved down until the center O1 of the engagement passage 303 between the two clamping legs 304 is aligned with the center O2 of the receiving space 105 (or guide tube 104), and the spigot 20 is fully inserted into the receiving space 105 and mated with the guide tube 104 (as shown in fig. 2 and 10). The locking leg 302 of the locking member 30 recovers its shape and snaps into engagement with the catch member 101 (as shown in fig. 10). Thereby, the assembly of the pipe connector 1 and the pipe plug 20 is completed. In this state, the clamping legs 304 of the locking members 30 are mated with the clamping segments 204 of the pipe plug 20, the projections 320 on the clamping legs 304 abut the steps 205 on the pipe plug 20 (i.e., abut the large end rear side of the flange 203), and the lateral end faces 106 of the housing 103 abut the stops 210 on the pipe plug 20 (as shown in fig. 11). In this way, the protrusion 320 and the lateral end surface 106 prevent the tube plug 20 from axially floating, ensuring stable installation of the tube plug 20 in the pipeline connector 1.

During the entire assembly process, the locking member 30 and the pipe plug 20 are automatically locked together only by moving the pipe plug 20 in its insertion direction, which facilitates the user's operation.

It should be understood that the line connectors described herein are suitable for use in applications including and beyond the automotive field. In particular, the line connector may be used in any environment where a first fluid line is connected to a second fluid line. Such environments include, but are not limited to, aircraft, locomotives and ships, or industrial, commercial and residential areas, etc.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

List of reference numerals

A pipeline connector: 1

A locking piece: 101

Locking the channel: 102

A housing: 103

A guide pipe: 104

An accommodation space: 105

Center of the accommodation space 105 (or guide tube 104): o2

Axial end face: 106

Pipeline: 107

Transverse opening: 108

A first seal ring: 109

A cylindrical body: 110

Sealing lips: 111

A storage space: 112

Gasket: 113

Ring body: 114

Leg pressing: 115

Pipe plug: 20

A flow channel: 202

Flange: 203

Clamping sections: 204

Step (2): 205

A blocking body: 210

A locking piece: 30

A connecting part: 301

Locking the legs: 302

A joint channel: 303

Center of the joining channel 303: o1

Clamping the legs: 304

A first extension part: 308

A second extension part: 309

A pushing part: 310

An arc-shaped surface: 312

A connecting part: 313

And (3) projection: 320

Claims (15)

1. A pipe connector adapted to connect with a pipe plug (20) having a tapered flange (203);

wherein the line connector comprises:

a housing (103) which defines an accommodation space (105), two locking channels (102) being formed on the housing (103), the two locking channels (102) extending transversely through the accommodation space (105) and being spaced apart from one another in a cross section of the housing (103); and

a locking member (30), said locking member (30) comprising two clamping legs (304) and two locking legs (302) corresponding to the two clamping legs (304); two clamping legs (304) and two locking legs (302) adapted to fit into respective locking channels (102); -on both locking legs (302) there are configured pushing portions (310) extending towards each other, the rear sides of the pushing portions (310) being configured as planes adapted to the cooperation with the flanges (203);

the line connector is configured such that, upon insertion of the pipe plug (20) into the receiving space (105), the flange (203) pushes the push portion (310) forward to displace at least the locking leg (302) forward in the insertion direction; the flange (203) then spreads the two locking legs (302) radially outwardly through between the two locking legs (302), while the locking legs (302) and the clamping legs (304) move within the respective locking channels (102) until the locking legs (302) snap into engagement with the housing (103), the locking member (30) abutting against the rear side of the flange (203) to lock the pipe plug (20).

2. The pipe connector according to claim 1, wherein two of the clamping legs (304) are at the rear side of the respective locking legs (302) and are configured with a forwardly extending protrusion (320), the protrusion (320) being adapted to abut against the rear of the large end of the tapered flange (203) for locking the pipe plug (20).

3. The line connector of claim 2, wherein the flange (203) is at a front end of the pipe plug (20).

4. The line connector of claim 1, wherein the flange (203) is in the middle of the pipe plug (20).

5. The line connector of claim 3, wherein the tube plug (20) further comprises a snap section (204) extending rearwardly from the large end of the flange (203), the snap section (204) having a diameter smaller than the large end diameter of the flange (203) forming a step (205) therebetween;

the clamping legs (304) are adapted to engage with the clamping sections (204) and the protrusions (320) are adapted to abut with the steps (205) to lock the pipe plug (20).

6. The line connector of claim 5, wherein the tube plug (20) further comprises a stop (210) extending radially outward from a circumferential outer wall of the snap section (204), the stop (210) being spaced from the flange (203) in an axial direction of the snap section (204);

when the pipe plug (20) is inserted into the accommodation space (105), the lateral end surface (106) of the housing (103) abuts against the stopper (210).

7. The line connector of claim 2, wherein the projections (320) extend forwardly forward of the respective locking leg (302).

8. The line connector of claim 2, wherein the locking leg (302) comprises a first extension (308) and a second extension (309) extending from the first extension (308); the two second extensions (309) are adapted to be elastically deformed; the two protrusions (320) respectively correspond to the first extension parts (308) and are positioned between the two first extension parts (308).

9. The line connector of claim 8, wherein the push portion (310) is between the first extension (308) and the second extension (309).

10. The line connector according to claim 1 or 8, characterized in that the two push portions (310) comprise arc-shaped faces (312) protruding towards each other, the arc-shaped faces (312) extending in the length direction of the locking leg (302).

11. The line connector according to claim 1, characterized in that a first sealing ring (109) is provided within the accommodation space (105); the first seal ring (109) comprises a cylindrical body (110) and an annular seal lip (111) connected to the cylindrical body (110) and extending toward the inside of the cylindrical body (110).

12. The line connector according to claim 11, characterized in that the sealing lip (111) is inclined towards the insertion direction.

13. The line connector according to claim 1, characterized in that a guide tube (104) is formed in the accommodation space (105).

14. The line connector according to claim 13, characterized in that two transverse openings (108) are formed in the side wall of the guide tube (104), which correspond to the two locking channels (102), respectively;

the two clamping legs (204) fit into the respective locking channels (102) through the respective transverse openings (108).

15. The line connector of claim 13, the end of the guide tube (104) being provided with a second sealing ring.

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