Quick insertion type connector

Abstract

The utility model provides a quick insertion type connector, and belongs to the technical field of machinery. The problem of insufficient use reliability is solved. One end of the connector body is an inserting end, the clamping ring and the lining pipe are both arranged in the connector body, a locking cap is connected to a port of the inserting end, an annular protruding edge is arranged on the outer side of the middle of the lining pipe, the locking cap is in threaded connection with the interior of the port of the inserting end, and an abutting step allowing the outer edge of the clamping ring to abut against is arranged in the inserting end. A positioning step is arranged between the clamping ring and the locking cap in the inserting end, a limiting ring is arranged on the positioning step in an abutting mode, the clamping ring is limited to the abutting step through the limiting ring, the limiting ring is limited to the positioning step through the locking cap, an annular protruding portion is arranged on the inner side of the locking cap, and the two ends of the lining pipe penetrate through the limiting ring and the annular protruding portion respectively. And the annular convex edge can move between the limiting ring and the annular convex part. The device has the advantages of high use reliability, compact structure and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical technical field relates to a quick plug connector. BACKGROUND

[0002] The pipeline connection such as waterway, gas line, oil line often needs to be connected through the connector, when connecting the traditional pipe connector with the pipeline, basically all are connected through thread, glue or heat melting, but these connection modes are more troublesome to operate, and the connection speed is slow. Therefore, people design the connector which can form quick connection with the pipeline in view of the above problems existing in the traditional pipe connector, and it has been widely applied in the market.

[0003] For example, the quick plug connector with patent application No. 201620619739.5, it includes the connector body, one end of the connector body is the plug-in end, the plug-in end is provided with a ring and an inner liner tube, the plug-in end is also provided with a positioning ring in the form of a ring, the outer side wall of the positioning ring abuts against the inner side wall of the plug-in end, the positioning ring limits the ring and the inner liner tube in the plug-in end, the plug-in end is screw connected with a locking cap outside, the inner side of the locking cap abuts against the rear end of the positioning ring, the rear end of the inner liner tube passes through the positioning ring and the locking cap in turn and is located outside the locking cap; the front end of the inner liner tube has an annular shoulder outside, the positioning ring is in the form of a ring, the rear end of the positioning ring has an annular convex edge inside, and the annular shoulder abuts against the annular convex edge. When using, the pipe is inserted into the plug-in end of the connector body through the inner liner tube, when the pipe passes through the ring, the teeth on the ring will be engaged on the outer side wall of the pipe to form quick connection, when disassembling, only need to push the inner liner tube inward to open the teeth of the ring and separate from the outer side wall of the pipe.

[0004] However, the above-mentioned quick plug connector also has the following problems: as can be seen from the drawings of the specification, the inner liner tube cannot be pushed out from the plug-in end due to the existence of the annular shoulder and the annular convex edge, but the moving distance of the inner liner tube towards the inside is not limited, and in actual use, the inner liner tube is easily pushed in too much and directly passes through the ring, at this time, the teeth of the ring will be directly engaged on the outer side wall of the inner liner tube, which causes the quick plug connector to be unable to be used again, so there is a problem of insufficient use reliability. UTILITY MODEL CONTENTS

[0005] The utility model aims at the above-mentioned problems existing in the prior art, and provides a quick plug connector, which solves the problem of insufficient use reliability.

[0006] The utility model can be realized by the following technical schemes:

[0007] The utility model provides a kind of fast plug-in connector, including the connector body with one end being plug-in end and the ring and inner liner tube being located in connector body, the port of plug-in end is connected with locking cap, the annular convex edge is outside in the middle part of inner liner tube, it is characterized in that, the locking cap is screwed in the port of plug-in end, plug-in end has abutting step for the outer edge of ring, plug-in end has positioning step between ring and locking cap, positioning step is arranged with limiting ring, limiting ring is positioned at abutting step with ring, and locking cap is positioned at positioning step with limiting ring, annular convex part is inside in locking cap, inner liner tube is passed through limiting ring and annular convex part respectively, and annular convex edge can move between limiting ring and annular convex part.

[0008] By abutting limiting ring on positioning step, locking cap is directly screwed inside in the port of plug-in end and limiting ring is positioned at positioning step, and inner liner tube is passed through limiting ring and annular convex part inside in locking cap respectively, and annular convex edge in the middle part of inner liner tube can move between limiting ring and annular convex part, so that, while preventing inner liner tube from being pulled out of plug-in end by annular convex part and annular convex edge, the maximum distance of inner liner tube moving inward can be limited by annular convex edge abutting against the outer end surface of limiting ring, thereby ensuring the use reliability of the fast connector.

[0009] In addition, positioning step is located between abutting step and locking cap, limiting ring is positioned at abutting step with ring, that is, limiting ring also restricts ring, so it has higher reliability.

[0010] In the above-mentioned fast plug-in connector, the limiting ring and the ring have a gap.

[0011] By setting a gap between limiting ring and ring instead of directly abutting, the limiting of ring is not affected (ring has only a small amount of movement), and ring can be in a suspended state to prevent pipe from exiting plug-in end when rotating.

[0012] In the above-mentioned fast plug-in connector, the limiting ring includes a main body in the form of a ring and a lug integrally connected to the inner circumferential surface of the outer end of the main body, and the limiting ring abuts against the positioning step through the lug.

[0013] When installing, the limiting ring is directly placed into the plug-in end, the main body of the limiting ring passes through the center of the positioning step, and the lug is hung on the positioning step so that the limiting ring can abut against the positioning step.

[0014] In the above-mentioned quick plug connector, the outer end surface of the locking cap is provided with a plurality of connecting holes distributed around the center line thereof.

[0015] Since the locking cap is threadedly connected to the inner side of the port of the plug-in end, a plurality of connecting holes are provided on the outer end surface of the locking cap, and the locking cap can be conveniently installed by inserting a tool into the connecting holes.

[0016] In the above-mentioned quick plug connector, the locking cap is a plastic part, the port of the plug-in end has a groove, and the outer peripheral side of the outer end portion of the locking cap has an ear portion abutting against the groove.

[0017] The ear portion abutting against the groove can limit the depth of the thread connection of the locking cap. Since the locking cap is a plastic part, the ear portion is protected by being covered by the groove, so that the ear portion is prevented from being damaged.

[0018] In the above-mentioned quick plug connector, both ends of the connector body are the plug-in end, and the structures of both ends of the connector body are the same.

[0019] Compared with the prior art, the quick plug connector of the present application is provided with a limiting ring abutting against the positioning step, the locking cap is directly threadedly connected to the inner side of the port of the plug-in end and limits the limiting ring at the positioning step, the inner liner tube passes through the limiting ring and the annular convex portion on the inner side of the locking cap at both ends thereof, and the annular convex edge on the outer side of the middle portion of the inner liner tube can move between the limiting ring and the annular convex portion. Thus, the annular convex edge and the annular convex portion are used to prevent the inner liner tube from being pulled out of the plug-in end, and the annular convex edge abuts against the outer end surface of the limiting ring to limit the maximum distance of the movement of the inner liner tube towards the inside, so that the use reliability of the quick plug connector is ensured. The positioning step is located between the abutting step and the locking cap, the limiting ring limits the ring at the abutting step, that is, the limiting ring also limits the ring, so that the reliability is higher. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a sectional view of the quick plug connector.

[0021] In the drawing, 1 is a connector body, 1a is a plug-in end, 1a1 is an abutting step, 1a2 is a positioning step, 1a3 is an annular groove, 1a4 is a groove, 2 is a ring, 2a is a tooth, 3 is an inner liner tube, 3a is an annular convex edge, 4 is a locking cap, 4a is an annular convex portion, 4b is a connecting hole, 4c is an ear portion, 5 is a limiting ring, 5a is a main body, 5b is a lug, and 6 is a sealing ring. DETAILED DESCRIPTION

[0022] The utility model discloses a specific embodiment as follows and further describes the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.

[0023] As Figure 1 The utility model discloses a kind of quick plug connectors, including the connector body 1 with one end being plug end 1a and the collar 2 and inner liner pipe 3 being arranged in plug end 1a, the port of plug end 1a is connected with locking cap 4.Locking cap 4 is connected in the port of plug end 1a, plug end 1a has abutting step 1a1 for the outer edge of collar 2 to abut, plug end 1a has positioning step 1a2 between collar 2 and locking cap 4, limiting ring 5 is arranged on positioning step 1a2 and abuts, limiting ring 5 is positioned at abutting step 1a1 by collar 2, and locking cap 4 positions limiting ring 5 at positioning step 1a2.Locking cap 4 has annular protrusion 4a on inner side, inner liner pipe 3 two ends pass limiting ring 5 and annular protrusion 4a respectively, and inner liner pipe 3 has annular convex edge 3a on middle outer periphery side, and annular convex edge 3a can move between limiting ring 5 and annular protrusion 4a.Locking cap 4 outer end surface is equipped with several connection holes 4b distributed around its center line, because locking cap 4 is connected in the inner side of the port of plug end 1a, so it can be very conveniently installed for staff to cooperate with tool to insert in each connection hole 4b to locking cap 4.Locking cap 4 is plastic piece, the port of plug end 1a has recess 1a4, and the outer periphery side of the outer end of locking cap 4 has lug 4c that abuts in recess 1a4.By abutting in recess 1a4 in lug 4c, the depth of the threaded connection of locking cap 4 can be limited.Meanwhile, because locking cap 4 is plastic piece, by abutting in recess 1a4 in lug 4c, it is equivalent to wrap lug 4c, can play certain protection effect, prevent from being hit.

[0024] Further, as Figure 1 The side surface between limiting ring 5 and collar 2 is provided with gap, the setting of the gap makes collar 2 be in suspended state, i. e. not be pressed dead on abutting step 1a1, so that pipe can not be separated from collar 2 when rotating.Limiting ring 5 is nylon material, and limiting ring 5 includes annular main body 5a and lug 5b integrally connected to the outer end outer periphery of main body 5a, and limiting ring 5 is abutted on positioning step 1a2 through lug 5b.Ring groove 1a3 is further arranged in plug end 1a, and abutting step 1a1 is located between ring groove 1a3 and positioning step 1a2, and sealing ring 6 is arranged in ring groove 1a3. Figure 1 Further, as

[0025] In use, the pipe to be connected is inserted into the spigot end 1a through the inner liner 3, and the support tube 6 is thereby inserted into the pipe. The pipe passes through the collar 2 and spreads the teeth 2a on the collar 2, and the teeth 2a bite onto the outer wall of the pipe to form a quick connection. When disconnection is required, the inner liner 3 is simply pushed into the spigot end 1a, and the teeth 2a on the collar 2 are spread by the inner end of the inner liner 3 to disengage from the pipe.

[0026] By abutting the limiting ring 5 against the positioning step 1a2, the locking cap 4 is directly screwed into the inner side of the port of the spigot end 1a and limits the limiting ring 5 at the positioning step 1a2, and the inner liner 3 passes through the limiting ring 5 and the annular protrusion 4a on the inner side of the locking cap 4 at both ends and enables the annular protrusion 3a on the outer side of the middle part of the inner liner 3 to move between the limiting ring 5 and the annular protrusion 4a, so that the annular protrusion 4a and the annular protrusion 3a are used to prevent the inner liner 3 from being pulled out of the spigot end 1a, and the annular protrusion 3a is abutted against the outer end face of the limiting ring 5 to limit the maximum distance of the inner liner 3 moving inward, thereby ensuring the use reliability of the quick plug connector.

[0027] In addition, the positioning step 1a2 is located between the abutting step 1a1 and the locking cap 4, and the limiting ring 5 limits the collar 2 at the abutting step 1a1, that is, the limiting ring 5 also limits the collar 2, so that the reliability is higher. Moreover, the limiting ring 5 has the functions of limiting the collar 2 and the inner liner 3, and realizes one object with two functions, so that the structure is more compact while the use reliability is improved.

[0028] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, without deviating from the spirit of the present application or exceeding the scope defined by the appended claims.

Claims

1. A quick coupling, comprising a coupling body (1) with a spigot end (1a), a collar (2) and a liner tube (3) disposed in the coupling body (1), a locking cap (4) being connected to the spigot end (1a), and an annular protrusion (3a) being formed on the outer side of the middle portion of the liner tube (3), characterized in that, the annular protrusion (3a) is provided with a plurality of annular grooves (3b) and a plurality of annular protrusions (3c) are formed on the inner side of the annular grooves (3b). The locking cap (4) is screwed in the port of the plug-in end (1a), the plug-in end (1a) has an abutting step (1a1) for the outer edge of the collar (2) to abut against, and the plug-in end (1a) has a positioning step (1a2) between the collar (2) and the locking cap (4), the positioning step (1a2) is provided with a limiting ring (5) abutting against, the limiting ring (5) limits the collar (2) at the abutting step (1a1), and the locking cap (4) limits the limiting ring (5) at the positioning step (1a2), the inside of the locking cap (4) has an annular protrusion (4a), the inner liner tube (3) passes through the limiting ring (5) and the annular protrusion (4a) at both ends, and the annular protrusion (3a) can move between the limiting ring (5) and the annular protrusion (4a).

2. A quick disconnect coupling according to claim 1, wherein, The limiting ring (5) has a gap with the collar (2).

3. A quick disconnect coupling according to claim 2, wherein, The limiting ring (5) comprises a main body (5a) in the shape of a ring and a lug (5b) integrally connected to the inner circumferential surface of the outer end of the main body (5a), and the limiting ring (5) abuts against the positioning step (1a2) through the lug (5b).

4. A quick connector according to claim 1 or 2 or 3, wherein The outer end surface of the locking cap (4) is provided with a plurality of connecting holes (4b) distributed around the center line thereof.

5. A quick disconnect coupling according to claim 4, wherein, The locking cap (4) is a plastic part, the port of the plug-in end (1a) has a groove (1a4), and the outer circumferential side of the outer end of the locking cap (4) has an ear (4c) abutting against the groove (1a4).

6. A quick connector according to claim 1 or 2 or 3, wherein Both ends of the joint body (1) are the plug-in end (1a), and the two ends of the joint body (1) are the same in structure.

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