CN217208273U - Self-locking quick joint - Google Patents

Abstract

The utility model discloses a self-locking quick coupling. The utility model discloses a self-locking quick-operation joint includes female head and public head, and public head can be followed the axis and removed and inserted in the female head. Public head is equipped with the ring channel, forms buckle structure's annular step and holding tank, and female head contains main part, jack catch and sleeve. The annular groove of the male head is provided with a sealing element which is used for contacting with the inner cavity of the female head main body to form sealing. The buckle of the male head is embedded with the claw of the female head to form self-locking. The sleeve of the female head moves along the axial direction to drive the clamping jaw of the female head to move, and unlocking is completed. The utility model discloses a quick-operation joint device can realize connecing soon in narrow and small space, easy dismounting, can automatic locking and take the connection protection measure.

Description

Self-locking quick joint

Technical Field

The utility model relates to a pipe connection field, more specifically relates to a auto-lock quick-operation joint.

Background

Quick pipe joints, also known as push-in pipe joints, are used in many applications because of their advantages of ease of operation, perfect and compact connections, and repeated use. In various fields of industrial production, connection of two pipelines (the pipelines can be a water pipeline, a gas pipeline, an oil pipeline or the like) is often involved, and the pipeline quick connector is widely applied to connection between pipelines. Conventional quick pipe joints typically employ threaded connections, push-to-press connections, switch-type connections, push-pull connections, and the like.

In the threaded connection, the clamping jaw is pressed to further clamp the hose through the locking nut, so that the hose is prevented from slipping and falling off; the sealing structure has the defects that the end face of the hose is flat and the surface is complete and smooth, uneven places need to be carefully checked or removed before installation, a large number of tools are used, the installation process is complicated, and the sealing structure is not suitable for installation in a small space.

In the press type connection, a connecting rod of the female head is pressed or pulled through a lever principle to drive the clamping jaw to press or firmly clamp the male head so as to form sealing and prevent movement; the disadvantages are that: the product has a complex structure, and the exposed connecting rods are easy to collide or hook, so that the device is opened accidentally.

In the switch type connection, when the male head is inserted into the female head, the step on the male head pushes the jaws of the female head to expand to lock the male head. When the device is disassembled, the switch is pressed to expand the clamping jaws, and the male head can be withdrawn; the disadvantages are that: when the device is complex in structure, the switch structure is easy to be blocked, and the switch has the risk that the jack catch expands and the male head is separated due to accidental collision or pressing; when the device is simple in structure, the device is stressed in one direction, and a long-term sealing ring or a plastic piece is easy to deform.

In the push-pull connection, after the male head is inserted into the female head, the sleeve of the female head is pulled to drive the buckle to lock the male head; the disadvantages are that: the sealing element is positioned in the female head, is difficult to observe whether the sealing element has defects, and is difficult to inspect and investigate before installation and when leakage is caused; the locking of public head is accomplished through the female sleeve of staff pulling, does not have safeguard measure, and the public head is deviate from easily when drawing not in place (for example, the buckle is half connected), causes to reveal.

In conclusion, the existing quick connector has the defects of inconvenient connection and/or disassembly and assembly, easy falling, poor sealing degree and the like.

Therefore, there is still a lack in the art of a quick connection device with a self-locking protection measure, which has a simple structure, a small installation space, and is easy to assemble and disassemble (e.g., can be disassembled and assembled by hands).

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a auto-lock quick-operation joint and auto-lock and unblock method thereof. The utility model discloses a self-locking quick-operation joint includes female head and public head, and public head can be followed the axis and removed and inserted in the female head. Public head is equipped with the ring channel, forms buckle structure's annular step and holding tank, and female head contains main part, jack catch and sleeve. The annular groove of the male head is provided with a sealing element which is used for contacting with the inner cavity of the female head main body to form sealing. The buckle of the male head is embedded with the claw of the female head to form self-locking. The sleeve of the female head moves along the axial direction to drive the clamping jaw of the female head to move, and unlocking is completed. The utility model discloses a quick-operation joint device can realize connecing soon in narrow and small space, easy dismounting, can automatic locking and take the connection protection measure.

In a first aspect of the present invention, a self-locking quick connector is provided, which comprises a female head and a male head, wherein the male head and the female head are connected in a snap fit manner; the female head comprises a main body, the main body is of a hollow tube structure, one end of the main body is connected with a pipeline, and the other end of the main body is provided with a window and a clamping head; the C ring comprises a convex rib, the convex rib is coated on the outer side of the main body, and an annular rib is arranged on the convex rib; the clamping jaw is a clamping piece which extends out of the second end of the convex rib along the axial direction and comprises a branch part, a first convex part and a reinforcing rib, one end of the branch part is fixedly connected with the convex rib, the other end of the branch part is fixedly connected with the first convex part, the first convex part is used for being buckled into the windowing, and the reinforcing rib is a rib arranged at the joint of the branch part and the first convex part; the sleeve is a hollow cylinder body and is sleeved outside the main body and the C ring, an annular barrier strip and a clamping groove are arranged on the inner side wall of the sleeve, the barrier strip is used for interacting with the ribs, the clamping groove is used for interacting with the clamping head, and the axial sliding of the sleeve is limited through the barrier strip and the clamping groove; the male head comprises a connector, the connector is of a hollow tube structure, one end of the connector is provided with a second convex part and a containing groove, and the other end of the connector is connected with a pipeline; the first convex part is matched with the accommodating groove in a snap fit mode to assemble and connect the female head and the male head; unmating the female head and the male head by moving the first protrusion out of the receiving slot.

In another preferred example, the joint of the convex rib and the branch part is also reinforced and supported by a rib.

In another preferred embodiment, a marking part is arranged on the inner side wall of the main body, and when the second convex part of the male head travels to reach the marking part, a sufficient movement space is provided for the outward expansion of the claw, so that the second convex part can be unlocked from the claw.

In another preferred embodiment, the marking part is a protrusion arranged on the inner side wall of the main body, and when the second protrusion of the male head abuts against the protrusion, the sleeve can be retracted, so that the jaws expand outwards, and the male head and the female head are unlocked.

In another preferred embodiment, the self-locking quick coupling includes a stopper, the stopper is disposed at the other end of the main body and does not block the chuck, and an outer circumferential portion of the stopper is capable of abutting against the sleeve to protect the sleeve and prevent the sleeve from moving due to an unnecessary external force.

In another preferred embodiment, a concave groove and/or a concave opening is/are arranged at the other end of the main body, a buckle convex part is arranged on the stop block, and the buckle convex part and the concave groove and/or the concave opening are/is fixed through buckle fit.

In another preferred embodiment, the free end of the stop is provided with a radially outward flange, which abuts against the sleeve.

In another preferred example, the main body comprises a guide groove/guide bar, the guide groove/guide bar is arranged on the outer peripheral surface of the other end of the main body, and correspondingly, the guide bar/guide groove is arranged on the inner peripheral wall of the sleeve; during the assembly of the sleeve, the guide bar slides in the guide groove for guiding the assembly positional relationship between the sleeve and the main body.

In another preferred embodiment, a first retainer ring is provided at one end of the body for providing locating and sliding support for the sleeve while blocking the C-ring from withdrawing over a distance.

In another preferred embodiment, the first retainer ring is waist-shaped.

In another preferred embodiment, the sleeve is a kidney-shaped sleeve for preventing the sleeve from rotating.

In another preferred embodiment, the first baffle ring in the shape of a waist circle and the sleeve in the shape of a waist circle are adapted.

In another preferred example, a first wave is arranged at one end of the main body and is used for being connected with the pipeline.

In another preferred embodiment, the chuck is a protrusion fixed on the main body and outwards along the radial direction; the clamping groove is limited by two bulges; when the sleeve is assembled, one end, far away from the clamping groove, of the sleeve is firstly sleeved outside the main body and the clamping claws, the sleeve is continuously pushed, so that the clamping groove slides through the clamping head, the blocking strip and the clamping groove of the sleeve are sealed between the convex rib and the clamping head, and the sleeve slides in a limited range.

In another preferred example, the number of the clamping heads is at least one; preferably, 2 to 8; more preferably, 2 to 6.

In a further refinement, the clamping heads are distributed uniformly circumferentially on the outside of the other end of the main body.

In another preferred example, the number and the position relationship of the clamping grooves correspond to the clamping heads.

In another preferred example, the barrier strip is an annular barrier strip formed by a plurality of sections of flanges.

In another preferred example, the barrier strip is an annular barrier strip formed by a whole section of the flange.

In another preferred embodiment, an indication arrow is provided on the outer circumferential surface of the sleeve for indicating the sliding direction of the sleeve when the self-locking quick connector is unlocked.

In another preferred embodiment, the rib is of a semi-surrounding structure, and in the assembling process of the C-ring, the C-ring is clamped and sleeved on the periphery of the main body through a notch of the rib.

In another preferred embodiment, the annular rib is interrupted at a position opposite to the notch. This arrangement allows for even expansion of the ribs during disassembly of the male and female heads.

In another preferred example, the number of the claws is at least one; preferably, 1-6; more preferably, 2 to 4.

In another preferred example, the number of the windows and the number of the claws are in one-to-one correspondence.

In another preferred embodiment, one of the windows corresponds to the plurality of jaws.

In a further preferred embodiment, a plurality of claws is distributed as uniformly as possible over the rib.

In another preferred embodiment, at least one rib is arranged on the convex rib; preferably, 1-5; more preferably, 2 to 4. The setting of a plurality of ribs makes the intensity of protruding muscle increases, and non-deformable just can provide reserve stopping, avoids because of the rib that manufacturing defect or long-term wearing and tearing etc. caused the not enough condition of power of holding back.

In another preferred embodiment, the male head further comprises a sealing member, and an annular groove is formed on the outer peripheral wall of one end of the male head, and the sealing member is arranged in the annular groove and used for providing sealing between the male head and the inner cavity of the main body.

In another preferred embodiment, the number of the ring grooves is 1-5; preferably, 2 to 4; more preferably, 2 to 3.

In another preferred embodiment, a second retainer ring is provided at the other end of the joint, and the second retainer ring and the second protrusion together form the receiving groove.

In another preferred example, a second wave is arranged at the other end of the joint, and the second wave is used for being connected with the pipeline.

In another preferred example, in the condition that the male head and the female head are assembled, the second retainer is accommodated in the inner cavity of the main body, and the periphery of the second retainer is abutted against the inner cavity of the main body so as to provide auxiliary supporting and fixing for the male head in the female head.

In another preferred example, a non-return valve is further arranged in the inner cavity of the main body. But not limited to, a non-return valve, a flow-limiting valve or a filter may also be provided. Or a combination of functional fittings (i.e. more than one valve, or two, or more than one single functional fitting, or a combination of check valve + filter)

In another preferred example, one end of the check valve band sealing member is inserted from the open end of the main body to the bottom.

In another preferred embodiment, the depth of the cavity of the body is much greater than the depth required for insertion of the male head.

In another preferred embodiment, the jaws have openings that are smaller than the diameter of the body.

In another preferred embodiment, when the self-locking quick connector is connected with the pipeline, a steel sleeve is sleeved outside the pipeline, the wave (including the first wave or the second wave) is loaded into the pipeline sleeved with the steel sleeve, and the steel sleeve is clamped and pressed to clamp and fix the pipeline and the main body or the connector.

In another preferred example, the first protrusion comprises a first end face and a second end face, wherein the first end face is of a chamfered design, which facilitates the fit between the first protrusion and the second protrusion; the radial distance of the second end face is the distance from the innermost side of the reinforcing rib to the innermost side of the first convex part, and the distance is about 2-50 mm; preferably, 3-25 mm; more preferably, 5-15 mm.

In another preferred example, the second end face is a vertical face and/or an inclined face (with respect to the axial direction of the self-locking quick connector), and in the case that the second end face includes the inclined face, the first protrusion and the branch portion form a hook shape of the inside buckle.

In another preferred example, the second projection comprises a third end face and a fourth end face, wherein the third end face is of chamfered design or is an inclined face to facilitate passage of the first end face of the first projection; the fourth end surface is a vertical surface and/or an inclined surface (relative to the axial direction of the self-locking quick connector), and under the condition that the second end surface comprises the inclined surface, the second convex part and the main body of the male head form a hook shape of an inner buckle.

In another preferred embodiment, after the male head and the female head are assembled, the male head can rotate in the female head, and the configuration enables the male head and the female head to have a larger freedom of movement (mutual rotation), avoid winding of a pipeline connected with the male head and the female head, and the like.

In another preferred embodiment, after the second protrusion of the male head passes over the first protrusion of the female head, the first protrusion will rebound into the receiving groove, during which the operator can determine that the female head and the male head are mounted by sensing the force change and/or hearing the rebound to generate an impact sound (e.g., a "click").

In a second aspect of the present invention, there is provided a self-locking method, the method comprising: (1) providing a self-locking quick connector according to any one of claims 1-8; (2) moving the male head along an axis to insert into the body of the female head, inserting the first protrusion into the receiving groove, and locking the male head and the female head through the snap fit of the first protrusion and the second protrusion.

A third aspect of the present invention provides an unlocking method, including: (1) providing the self-locking quick connector of any one of claims 1-8, and the self-locking quick connector is in a self-locking state; (2) the sleeve slides in the direction far away from the male head, the barrier strip drives the rib of the convex rib to slide, so that the C ring is withdrawn, the first convex part expands outwards and is withdrawn from the accommodating groove, and the female head is disengaged from the male head.

The utility model discloses a main advantage includes:

(a) the structure is simple, tools are not needed, and the assembly and the disassembly can be carried out by one hand;

(b) the whole joint is protected by the sleeve, and has no exposed part and no hidden trouble of opening caused by accidental collision;

(c) the size is small, the structure is compact, and the installation can be completed in a small space (for example, a narrow space);

(d) the device has a protection measure of automatic locking, is more stable in connection and is not easy to fall off;

(e) a check valve or other functional fittings can be inserted into the female head;

(f) a seal (e.g., an O-ring) is forced circumferentially to form a seal;

(g) after the male head and the female head are assembled, the male head can rotate in the female head, so that the male head and the female head have larger freedom of movement (mutual rotation), and the winding of a pipeline connected with the male head and the female head is avoided;

(h) when the male head and the female head are assembled, an operator can determine that the female head and the male head are assembled simply and directly by sensing force change and/or hearing rebound sound.

It is understood that within the scope of the present invention, the above-mentioned technical features of the present invention and those specifically described below (e.g. in the examples) can be combined with each other to constitute new or preferred technical solutions. Not to be reiterated herein, but to the extent of space.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective view of a main body of a female head according to an example of the present invention;

fig. 2 is a perspective view of a stop block of the female head according to an example of the present invention;

fig. 3A is a perspective view of a C-ring of the female head in an example of the invention;

FIG. 3B is a cross-sectional view of one of the jaws of FIG. 3A;

fig. 4A is a perspective view of a sleeve of a female head in an example of the invention;

FIG. 4B is a cross-sectional view of the sleeve of FIG. 4A;

FIG. 4C is another cross-sectional view of the sleeve of FIG. 4A;

fig. 5A is a perspective view of a male connector according to an embodiment of the present invention;

FIG. 5B is a front view of the joint of FIG. 5A;

fig. 6A is a front view of a self-locking quick connector according to an embodiment of the present invention;

FIG. 6B is a cross-sectional view taken along section A-A of FIG. 6A;

FIGS. 7-10 are schematic diagrams illustrating the locking and unlocking process of the self-locking quick connector of FIGS. 6A and 6B, wherein FIG. 7 is a schematic diagram before the female and male connectors are accessed; FIG. 8 is a schematic view of the male portion inserted into the female portion, the connector and the jaws initially contacting; FIG. 9 is a schematic view of the coupling passing over the jaws, the jaws springing back, both forming a self-lock; fig. 10 is a schematic diagram of the socket driving the C loop to retract, the claws to expand outward, the connector and the claws to release self-locking, and the male head and the female head to disengage.

In the drawings, each symbol is as follows:

1-female head;

2-a pipeline;

3-steel sleeve;

4-a stop block;

4.1-flange;

4.2-snap boss;

5-a main body;

5.1-first waves;

5.2-first retaining ring;

5.3-windowing;

5.4-guide groove;

5.5-chuck;

5.6-mark part;

a 6-C ring;

6.1-claw grip;

6.2-the first end face;

6.3-a second face;

6.4-convex rib;

6.5-reinforcing ribs;

6.6-branch;

6.7-first convex part;

6.8-ribs;

6.9-notch;

7-a sleeve;

7.1-arrow;

7.2-card slot;

7.3-conducting bar;

7.4-barrier strip;

8-male head;

9-a linker;

9.1-second waves;

9.2-ring groove;

9.3-third end face;

9.4-fourth end face;

9.5-accommodating groove;

9.6-second projection;

9.7-a second collar;

10-a seal;

11-check valve.

Detailed Description

The inventor of the invention develops a self-locking quick connector for the first time through extensive and intensive research and a large number of screens. The self-locking quick connector comprises a female head and a male head, wherein the male head can move along an axis and be inserted into the female head; the male head is provided with an annular groove, an annular step forming a buckle structure and an accommodating groove, and the female head comprises a main body, a clamping jaw and a sleeve; the annular groove of the male head is provided with a sealing element which is used for contacting with the inner cavity of the female head main body to form sealing; the buckle of the male head is embedded with the jaw of the female head to form self-locking; the sleeve of the female head moves along the axial direction to drive the clamping jaw of the female head to move so as to complete unlocking; the waist-round sleeve is matched with the waist-round first check ring, so that the sleeve can axially move under a smaller appearance, and the sleeve can be prevented from rotating after the female head is installed; the first convex part of the C ring and the second convex part of the joint can be configured into a ring surface with inclination, so that the interlocking and the passing sliding are convenient; the distance is reserved in the inner cavity of the main body, at least one check valve or flow limiting valve can be installed, and meanwhile, the moving distance of the male head is provided, so that the male head can be installed just enough, and no redundant moving space exists; the utility model discloses a quick-operation joint device can realize connecing soon in narrow and small space, easy dismounting can automatic locking and take the connection protection measure, has accomplished on this basis the utility model discloses a quick-operation joint device is convenient for use.

The present invention will be further described with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, the drawings are schematic and, thus, the present invention is not limited to the size or scale of the schematic.

It is to be noted that in the claims and the description of the present patent, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the use of the verb "comprise a" to define an element does not exclude the presence of another, same element in a process, method, article, or apparatus that comprises the element.

Examples

The self-locking quick connector of the embodiment is a pipeline connector applied to a braided hose or a hard plastic pipe (the pipeline connector is used for a liquid and/or gas transmission pipeline, and a device for connecting pipelines with two separated ends is used for realizing the transmission of liquid and/or gas in the pipeline under the condition of no leakage), and is particularly suitable for connecting flexible pipes for building domestic water (such as flexible pipes of kitchen and toilet sanitary wares). The connection scheme of the existing flexible pipe comprises the following steps: welding connection, hot melt connection, threaded connection, socket connection and the like.

The self-locking quick connector of the embodiment solves a plurality of problems existing in other quick connectors, namely: single-handed assembly and disassembly are realized in a small space; II, secondly: a check valve can be inserted into the female quick connector; thirdly, the steps of: the O-ring annular sealing ring bears force; fourthly, the method comprises the following steps: the small size is applied to installation in a small space.

The self-locking quick connector of the embodiment is shown in figures 1-10.

The auto-lock quick-operation joint of this embodiment includes female 1 and public head 8, and public head 8 is connected for the snap fit in the female 1 of axis removal insertion, public head 8 and female 1.

The female head 1 comprises a body 5, a C-ring 6, a sleeve 7 and a stopper 4. Main part 5 is hollow tube structure, and main part 5's one end is connected with pipeline 2 through first ripples 5.1, is equipped with windowing 5.3 and dop 5.5 on main part 5's the other end. The C-ring 6 comprises ribs 6.4 and jaws 6.1. The convex rib 6.4 is coated on the outer side of the main body 5, and the convex rib 6.4 is provided with an annular rib 6.8. The rib 6.4 is a half-surrounding structure (e.g., having a notch in the circumferential range of 1/5 to 1/3), and the C-ring 6 is engaged and fitted around the outer periphery of the main body 5 through the notch 6.9 of the rib 6.4 during the assembly of the C-ring 6. Jack catch 6.1 is the buckle spare that extends along the axial from protruding muscle 6.4's second end, and jack catch 6.1 includes branch portion 6.6, first convex part 6.7 and strengthening rib 6.5, and the one end and the protruding muscle 6.4 fixed connection of branch portion 6.6, branch portion 6.6 divide the other end and first convex part 6.7 fixed connection, and first convex part 6.7 is arranged in detaining into windowing 5.3, and strengthening rib 6.5 is the rib that sets up in branch portion 6.6 and first convex part 6.7 junction. The number of the claws 6.1 is 2, and the claws are oppositely arranged on the convex rib 6.4. The jaws 6.1 of the fenestrations 5.3 are correspondingly arranged. The opening formed by the 2 jaws 6.1 is smaller than the diameter of the body 5. The convex rib 6.4 is provided with 3 ribs 6.8. The setting of a plurality of ribs 6.8 makes protruding muscle 6.4's intensity increase, and non-deformable just can provide reserve the stopping, avoids because of the rib barrier force not enough condition that manufacturing defect or long-term wearing and tearing etc. caused. Sleeve 7 is oval-shaped's cavity barrel, and sleeve 7 cover is established outside main part 5 and C ring 6, is equipped with annular blend stop 7.4 and draw-in groove 7.2 on the inside wall of sleeve 7, and blend stop 7.4 is used for interacting with rib 6.8, and draw-in groove 7.2 is used for interacting with dop 5.5, through blend stop 7.4 and draw-in groove 7.2 restriction sleeve 7's axial slip. The stop block 4 is arranged at the other end of the main body 5 and does not shield the chuck 5.5, a radial outward flange 4.1 is arranged at the free end of the stop block 4, and the flange 4.1 abuts against the sleeve 7 and is used for protecting the sleeve 7 so as to prevent the sleeve 7 from moving due to unnecessary external force. Be equipped with the recessed groove on the other end of main part 5, be equipped with buckle bellying 4.2 on dog 4, buckle bellying 4.2 is fixed through the buckle cooperation with the recessed groove.

A marking 5.6 (e.g. a protrusion) is also provided on the inner side wall of the body 5, which provides sufficient space for the jaws 6.1 to expand outward when the second protrusion 9.6 of the male part 8 is advanced against the protrusion, indicating that the second protrusion 9.6 can be unlocked from the jaws 6.1.

The first protrusion 6.7 comprises a first end face 6.2 and a second end face 6.3, wherein the first end face 6.2 is of chamfered design, which facilitates the fit between the first protrusion 6.7 and the second protrusion 9.6; the radial distance of the second end surface 6.3 is the distance from the innermost side of the reinforcing rib 6.5 to the innermost side of the first convex part 6.7, and the distance is about 2-50 mm; preferably, 3-25 mm; more preferably, 5-15 mm.

The second end surface 6.3 is a vertical surface and/or an inclined surface (relative to the axial direction of the self-locking quick connector), and under the condition that the second end surface 6.3 comprises the inclined surface, the first convex part 6.7 and the branch part 6.6 form an inner-buckled hook shape.

The main body 5 is provided with a guide groove 5.4, the guide groove 5.4 is arranged on the outer peripheral surface of the other end of the main body 5, and correspondingly, the inner peripheral wall of the sleeve 7 is provided with a guide strip 7.3. During assembly of the sleeve 7, the guide strip 7.3 slides in the guide slot 5.4 for guiding the assembly positional relationship between the sleeve 7 and the body 5.

A first collar 5.2 is also provided at one end of the body 5, the first collar 5.2 serving to provide a locating and sliding support for the sleeve 7 while blocking the C-ring 6 from withdrawing over a distance. The first collar 5.2 is waisted and cooperates with the sleeve 7 to prevent rotation of the sleeve 7. The waisted design of the sleeve 7 also provides more space for the movement of the jaws 6.1.

The cartridge 5.5 is a radially outward projection fixed to the body 5. In the present embodiment, the number of the chucks 5.5 is 2, and the chucks are oppositely arranged on the outer side of the other end of the main body 5. The clamping heads 5.5 on the main body 5 of the clamping grooves 7.2 on the cylinder are correspondingly arranged. Each slot 7.2 is defined by two projections; when the sleeve 7 is assembled, one end of the sleeve 7, which is far away from the clamping groove 7.2, is firstly sleeved outside the main body 5 and the clamping jaws 6.1, and the sleeve 7 is continuously pushed, so that the clamping groove 7.2 slides through the clamping head 5.5, the blocking strip 7.4 and the clamping groove 7.2 of the sleeve 7 are sealed between the convex rib 6.4 and the clamping head 5.5, and the sleeve 7 slides in a limited range. Wherein, the barrier strip 7.4 is an annular barrier strip 7.4 formed by a plurality of sections of flanges 4.1.

In addition, an indication arrow 7.1 is arranged on the outer peripheral surface of the sleeve 7 and used for indicating the sliding direction of the sleeve 7 when the self-locking quick joint is unlocked.

The depth of the cavity of the body 5 is much greater than the depth required for insertion of the male tip 8. A non-return valve 11 is also arranged in the inner cavity of the body 5. The check valve 11 has one end with a seal 10 inserted from the open end of the main body 5 (the end receiving the male tip 8) to the bottom.

The male part 8 comprises a joint 9 and a seal 10. The joint 9 is a hollow pipe structure, one end of the joint 9 is provided with a second convex part 9.6 and a containing groove 9.5, and the other end of the joint 9 is connected with the pipeline 2 through a second wave 9.1. On the peripheral wall at one end of the spigot 9 there are 2 annular grooves 9.2, in which grooves 9.2 sealing elements 10 are arranged for providing a seal between the male part 8 and the inner cavity of the body 5. At the other end of the joint 9 a second collar 9.7 is provided, which collar 9.7 together with the second projection 9.6 forms a receiving groove 9.5. In the assembled condition of the male 8 and female 1, the second collar 9.7 is housed in the internal cavity of the body 5 and its periphery is also held against the internal cavity of the body 5 to provide an auxiliary support fixing for the male 8 in the female 1.

The second projection 9.6 comprises a third end face 9.3 and a fourth end face 9.4, wherein the third end face 9.3 is of chamfered design or is an inclined face to facilitate passage of the first end face 6.2 of the first projection 6.7; the fourth end surface 9.4 is a vertical surface and/or an inclined surface (with respect to the axial direction of the self-locking quick connector), and in the case that the second end surface 6.3 includes an inclined surface, the second protrusion 9.6 forms a snap-in hook shape with the bottom of the receiving groove 9.5.

When the self-locking quick connector is connected with the pipeline 2, the steel sleeve 3 is sleeved outside the pipeline 2, the waves (including the first waves 5.1 or the second waves 9.1) are installed in the pipeline 2 sleeved with the steel sleeve 3, the steel sleeve 3 is clamped and pressed, and the pipeline 2 and the main body 5 or the connector 9 are clamped and fixed.

The self-locking quick connector of the embodiment is assembled and operated as follows:

first, female head assembly

The steel sleeve 3 is sleeved outside the pipeline 2, the first waves 5.1 are arranged in the pipeline 2 (the pipeline has two types of braided hose and hard plastic pipe) sleeved with the steel sleeve 3, the special machine clamps and presses the steel sleeve 3, and the pipeline 2 and the main body 5 are clamped and fixed.

The non-return valve 11 is inserted from the opening (the end for receiving the male 2) to the bottom according to the direction of the flow of the medium to be prevented.

Jaw 6.1 direction alignment windowing 5.3 presses C ring 6, makes the breach of protruding muscle 6.4 run into the main part 5 back pressurized expansion and opens, and it is rebound to be greater than behind the main part 5 to the breach to make C ring 6 cover on main part 1, and jaw 6.1 card is in windowing 5.3.

The waist-round sleeve 7 is aligned with the waist-round first retainer ring 5.2 and is arranged in the body 1 according to the direction indicated by the arrow, and the guide strip 7.3 is embedded in the guide groove 5.4 for guiding. When the clamping groove 7.2 is expanded under stress after touching the clamping head 5.5, the clamping head rebounds to the original shape after 5.5.

The above female head 1 is assembled.

Second, male head assembly

The steel sleeve 3 is sleeved outside the pipeline 2 (the pipeline is a braided hose), the second wave 9.1 is arranged in the pipeline 2 sleeved with the steel sleeve 3, the steel sleeve 3 is clamped and pressed by a special machine, the pipeline 2 and the joint 9 are clamped and fixed, and the two sealing elements 10 are sequentially sleeved on the two annular grooves 9.1.

The above male head 8 is assembled.

Mounting of female head and male head

The male head 8 is inserted into the female head 1 along the axial direction, the third end surface 9.3 is contacted with the first end surface 6.2, so that the clamping jaws 6.1 are expanded, and the male head 8 can be inserted continuously. When the third end surface 9.3 exceeds the jaw 6.1, the jaw 6.1 rebounds into the accommodating groove 9.5.

The above installation is completed. The operator can determine that the female head 1 and the male head 8 have been installed by sensing the force change and/or hearing the rebound impact sound. After the male head and the female head are assembled, the male head can rotate in the female head, so that the male head and the female head have larger freedom of movement (mutual rotation), and the winding of a pipeline connected with the male head and the female head is avoided.

Fourthly, disassembling the female head and the male head

The male head 8 is pushed until the third end face 9.3 is contacted with the marking part 5.6, then the sleeve 7 is stirred according to the direction indicated by the arrow, the barrier strip 7.4 is contacted with the convex rib 6.4, and the C ring 6 is driven to move along with the sleeve 7. With the movement of the C ring 6, the reinforcing ribs 6.5 contact with the upper edge of the windows 5.3, so that the claws 6.1 are forced to expand. The male part 8 is withdrawn from the female part 1.

The above disassembly is completed.

Form self-locking protection

After the female head 1 and the male head 8 are installed, the male head 8 tends to be separated from the pipe due to gravity and pressure in the pipe, so that the fourth end surface 9.4 and the second inclined surface 6.3 are in contact to form mutual buckling. At this time, if the sleeve 7 is directly pushed to be disassembled, the claw 6.1 cannot be opened and the C ring 6 cannot move because the fourth end surface 9.4 and the second end surface 6.3 are contacted and buckled with each other, so that self-locking protection is formed.

Sixth, self-locking protection is released

The male part 8 is pushed until the third end surface 9.3 comes into contact with the marking 5.6 in the body 5, at which time the opening of the jaws 6.1 is not prevented by the fourth end surface 9.4. Then the sleeve 7 is shifted according to the direction indicated by the arrow, the barrier strip 7.4 is contacted with the convex rib 6.4, and the C ring 6 is driven to move along with the sleeve 7. With the movement of the C ring 6, the reinforcing ribs 6.5 contact with the upper edge of the windows 5.3, so that the claws 6.1 are forced to expand. The male head 8 is withdrawn from the female head 1, completing the unlocking process.

All documents mentioned in this application are incorporated by reference in this application as if each were individually incorporated by reference. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the above teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

Claims (10)

1. A self-locking quick connector is characterized by comprising a female head and a male head, wherein the male head and the female head are connected in a snap fit manner;

the female head comprises

The main body is of a hollow tube structure, one end of the main body is connected with a pipeline, and the other end of the main body is provided with a window and a clamping head;

a C ring comprising

The convex ribs are coated on the outer side of the main body and provided with annular ribs; and

the clamping jaw is a clamping piece which extends out from the second end of the convex rib along the axial direction and comprises a branch part, a first convex part and a reinforcing rib, one end of the branch part is fixedly connected with the convex rib, the other end of the branch part is fixedly connected with the first convex part, the first convex part is used for being buckled into the windowing, and the reinforcing rib is a rib arranged at the joint of the branch part and the first convex part; and

the sleeve is a hollow cylinder body and is sleeved outside the main body and the C ring, an annular barrier strip and a clamping groove are arranged on the inner side wall of the sleeve, the barrier strip is used for interacting with the ribs, the clamping groove is used for interacting with the clamping head, and the axial sliding of the sleeve is limited by the barrier strip and the clamping groove;

the male head comprises a connector which is in a hollow tube structure,

one end of the joint is provided with a second convex part and a containing groove, and the other end of the joint is connected with a pipeline;

the first convex part is matched with the accommodating groove in a snap fit mode to assemble and connect the female head and the male head; disengaging the female head from the male head by moving the first protrusion out of the receiving slot.

2. The self-locking quick connector of claim 1, comprising a stopper disposed at the other end of the main body and not covering the chuck, wherein an outer circumferential portion of the stopper is capable of abutting against the sleeve for protecting the sleeve from movement due to an unnecessary external force.

3. The self-locking quick connector of claim 1, wherein the main body comprises a guide groove/bar, the guide groove/bar is arranged on the outer circumferential surface of the other end of the main body, and correspondingly, the guide groove/bar is arranged on the inner circumferential wall of the sleeve; during assembly of the sleeve, the guide bar slides in the guide groove for guiding an assembly positional relationship between the sleeve and the main body.

4. The self-locking quick connector of claim 1 wherein the cartridge is a radially outwardly directed projection secured to the body; the clamping groove is limited by two bulges; when the sleeve is assembled, one end, far away from the clamping groove, of the sleeve is firstly sleeved outside the main body and the clamping claws, the sleeve is continuously pushed, so that the clamping groove slides through the clamping head, the blocking strip and the clamping groove of the sleeve are sealed between the convex rib and the clamping head, and the sleeve slides in a limited range.

5. The self-locking quick connector of claim 1, wherein an indication arrow is provided on the outer peripheral surface of the sleeve for indicating the sliding direction of the sleeve when the self-locking quick connector is unlocked.

6. The self-locking quick connector of claim 1, wherein the rib is of a semi-surrounding structure, and the C-ring is clamped and sleeved on the periphery of the main body through the notch of the rib in the assembly process of the C-ring.

7. The self-locking quick connector of claim 6 wherein the annular rib is broken at a location opposite the notch.

8. The self-locking quick connector of claim 1, wherein the male head further comprises a sealing member, and wherein an annular groove is provided in the outer peripheral wall of one end of the male head, the sealing member being disposed in the annular groove for providing a seal between the male head and the interior cavity of the body.

9. The self-locking quick connector of claim 1 wherein a marking portion is provided on an inside wall of the body, the second protrusion and the pawl being releasable from a locking relationship when the second protrusion of the male head travels to reach the marking portion.

10. The self-locking quick connector of claim 1, wherein a first retainer ring is provided at one end of the body, the first retainer ring is waist-shaped, the sleeve is also waist-shaped, and the waist-shaped first retainer ring and the waist-shaped sleeve are adapted.

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