Secondary locking device for quick connector

Abstract

The utility model discloses a secondary locking device for a quick connector. The secondary locking device comprises a locking nut and a sealing assembly. One end of the sealing assembly is inserted into the quick connector, the other end of the sealing assembly is inserted into the locking nut, and the sealing assembly comprises a sealing sleeve and a locking sleeve; the locking nut is buckled to the end, back on to the quick connector, of the sealing assembly and is in threaded connection with the quick connector. The end, inserted into the locking sleeve, of the sealing sleeve extends out of the locking sleeve and extends outwards in the radial direction. One side of the part extending outwards abuts against the interior of the quick connector, and the other side of the part extending outwards abuts against the locking sleeve; one end of the locking sleeve is inserted into the quick connector, the other end of the locking sleeve is inserted into the locking nut, and the locking sleeve comprises a connecting part and a locking part which are arranged in the axial direction. The sealing performance is achieved through the sealing assembly, the locking nut conducts primary locking, the end, extending out of the locking sleeve, of the sealing sleeve abuts against the inner wall of the quick connector, the sealing performance is achieved, the locking sleeve abuts against the outside of the sealing sleeve through the locking nut, and secondary locking is conducted while the sealing performance is achieved.

Description

Technical Field

[0001] The present application relates to a secondary locking device for a quick connector, and belongs to the technical field of quick connectors. Background Art

[0002] Existing quick connectors typically use ferrules to create a leak-proof seal. When the nut of the connector is tightened, the ferrule is compressed between the nut and the receiving connector. Due to this compression, the ferrule effectively bites into the tube, creating a secure grip and a tight seal.

[0003] However, the disadvantage of this sealing method is that any vibration, pulsation, thermal shock or lateral load on the accessories may cause the locking nut to loosen after long-term use, which may easily lead to the loss of sealing performance of the ring and reduce the service life of the quick connector. Utility Model Content

[0004] According to one aspect of the present application, a secondary locking device for a quick connector is provided to solve the problem that the existing quick connector is easy to loosen after long-term use, resulting in loss of sealing function and thus reducing the service life of the quick connector. The specific solution is:

[0005] A secondary locking device for a quick connector, comprising: a locking nut and a sealing assembly;

[0006] One end of the sealing assembly is inserted into the quick connector, and the other end of the sealing assembly is inserted into the locking nut. The sealing assembly includes a sealing sleeve and a locking sleeve.

[0007] The locking nut is buckled on an end of the sealing assembly facing away from the quick connector, and the locking nut is threadedly connected to the quick connector;

[0008] The sealing sleeve is inserted into the locking sleeve, one end of the sealing sleeve extends outward from the locking sleeve and extends outward in the radial direction, one side of the outwardly extending portion of the sealing sleeve presses against the inner wall of the quick connector, and the other side of the outwardly extending portion of the sealing sleeve abuts against the locking sleeve;

[0009] One end of the locking sleeve is inserted into the quick connector, and the other end of the locking sleeve is inserted into the locking nut, and the locking sleeve includes a connecting portion and a locking portion arranged along the axial direction;

[0010] One end of the connecting portion faces the quick connector, and the other end of the connecting portion is connected to a locking portion;

[0011] The locking portion extends outwardly along the radial direction of the connecting portion, and one end of the locking portion and the connecting portion overlaps the end of the quick connector facing the locking nut, and the locking portion presses against the inner side of the locking nut.

[0012] Preferably, the sealing sleeve and the locking sleeve are both elastic sealing elements.

[0013] Preferably, the locking portion comprises a plurality of locking teeth arranged at intervals;

[0014] A plurality of locking teeth are evenly arranged at the end of the sealing sleeve, and a plurality of locking teeth are circumferentially arranged along the circumference of the sealing sleeve. One end of the locking tooth is fixedly connected to the connecting portion, and the other end of the locking tooth faces away from the connecting portion.

[0015] Preferably, the cross-section of the locking tooth is a trapezoidal structure.

[0016] Preferably, the sum of the length of the connecting portion and the thickness of the portion of the sealing sleeve extending outward is the same as the length of the connecting end of the quick connector toward the locking nut.

[0017] Preferably, the outer dimensions of the portion of the sealing sleeve extending outward are the same as the outer dimensions of the connecting portion.

[0018] Preferably, the outer dimension of the locking portion is smaller than the inner diameter of the locking nut, and the length of the locking portion is smaller than the height of the locking nut.

[0019] Preferably, the length of the sealing sleeve is greater than the length of the locking sleeve.

[0020] The beneficial effects of this application include:

[0021] The secondary locking device provided in the present application includes a sealing assembly and a locking nut, wherein the sealing assembly realizes its sealing performance, and the locking nut realizes its first locking function, wherein the sealing assembly includes a sealing sleeve and a locking sleeve, the sealing sleeve is inserted into the locking sleeve, one end of the sealing sleeve extending out of the locking sleeve abuts against the inner wall of the quick connector to realize its sealing performance, and the locking sleeve is pressed against the outside of the sealing sleeve by the locking nut, realizing the sealing performance and the second locking function at the same time;

[0022] The sealing and locking function of the locking sleeve is achieved through the locking part. Specifically, when the locking nut rotates, the locking teeth gather together and approach the axis of the locking sleeve, and the adjacent locking teeth abut against each other. The opening diameter formed on the side where the locking teeth contact the sealing sleeve is reduced, so that the sealing sleeve is further compressed and connected to the connecting pipe / connecting piece at one end of the locking nut to achieve its sealing and locking effect. The locking teeth are stuck in the locking nut in a tooth-like shape on the side facing the locking nut, so that it is locked with the locking nut, thereby further improving the locking function of the locking nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a cross-sectional assembly diagram of a secondary locking device for a quick connector in one embodiment of the present application;

[0024] Figure 2 This is an exploded schematic diagram of a secondary locking device for a quick connector in one embodiment of the present application;

[0025] Figure 3 This is an exploded schematic diagram of the installation of a quick connector secondary locking device and a quick connector in one embodiment of the present application;

[0026] Figure 4 This is a schematic structural diagram of a locking nut in a secondary locking device of a quick connector in one embodiment of the present application;

[0027] Figure 5 This is a schematic structural diagram of a locking sleeve in a secondary locking device of a quick connector in one embodiment of the present application;

[0028] Figure 6 A top view of a second sealing member in a secondary locking device of a quick connector in one embodiment of the present application;

[0029] Figure 7 This is a schematic structural diagram of a first sealing member in a secondary locking device of a quick connector in one embodiment of the present application;

[0030] List of parts and reference numerals:

[0031] 1-locking nut, 2-locking sleeve, 3-sealing sleeve, 4-quick connector, 11-internal thread, 21-connecting part, 22-connecting ring, 23-locking teeth, 31-sealing ring, 32-connecting sleeve. DETAILED DESCRIPTION

[0032] The present application is described in detail below with reference to embodiments, but the present application is not limited to these embodiments.

[0033] According to the attached Figure 1-7 A secondary locking device for a quick connector is shown, comprising: a locking nut 1 and a sealing assembly;

[0034] The sealing assembly is inserted into the quick connector 4, one end of the sealing assembly is inserted into the quick connector 4, and the other end of the sealing assembly is inserted into the locking nut 1;

[0035] The locking nut 1 is buckled on the end of the sealing assembly away from the quick connector and is threadedly connected to the outside of the quick connector 4;

[0036] The sealing assembly comprises a sealing sleeve 3 and a locking sleeve 2, wherein the sealing sleeve 3 and the locking sleeve 2 are both elastic sealing sleeves;

[0037] The sealing sleeve 3 is inserted into the locking sleeve 2, and the sealing sleeve 3 extends out of the locking sleeve 2 toward one end of the quick connector 4. The end of the sealing sleeve 3 extending out of the locking sleeve 2 extends outwardly along the radial direction, and one side of the outwardly extending portion of the sealing sleeve 3 abuts against the inner side of the quick connector 4, and the other side of the outwardly extending portion of the sealing sleeve 3 abuts against the end of the locking sleeve 2;

[0038] One end of the locking sleeve 2 is inserted into the quick connector 4 , and the other end of the locking sleeve 2 is inserted into the locking nut 1 .

[0039] In one embodiment of the present application, the specific structure of the sealing sleeve 3 is as follows: the sealing sleeve 3 includes a sealing ring 31 and a connecting sleeve 32 arranged along the axial direction, one side of the sealing ring 31 is fixedly connected to one end of the connecting sleeve 32, and the other side of the sealing ring 31 abuts against the inner side of the quick connector 4; the sealing ring 31 and the connecting sleeve 32 are integrally formed; the inner diameter of the sealing ring 31 is the same as the inner diameter of the connecting sleeve 32, and the outer diameter of the sealing ring 31 is larger than the outer diameter of the connecting sleeve 32;

[0040] The length of the connecting sleeve 32 and the thickness of the sealing ring 31 are the same as the connection length of the end of the quick connector 4 facing the locking nut 1;

[0041] The length of the connecting sleeve 32 is equal to the sum of the lengths of the connecting portion 21 and the locking portion;

[0042] In one embodiment of the present application, the specific structure of the locking sleeve 2 is that the locking sleeve 2 includes a connecting portion 21 and a locking portion arranged along the axial direction;

[0043] The connecting portion 21 is cylindrical in structure, the inner diameter of the connecting portion 21 is slightly larger than the outer diameter of the connecting sleeve 32, and the thickness of the connecting portion 21 is equal to the difference between the ring width of the sealing ring 31 and the thickness of the connecting sleeve 32, so that when the end of the connecting portion 21 abuts against the side of the sealing ring 31 facing away from the quick connector 4, the outer side surface of the connecting portion 21 is on the same plane as the outer side surface of the sealing ring 31;

[0044] One end of the locking portion is fixedly connected to the connecting portion 21, the locking portion is located on the locking nut 1 and abuts against the locking nut 1, the locking portion is cylindrical as a whole, the inner diameter of the locking portion is the same as the inner diameter of the connecting portion 21, and the outer diameter of the locking portion is larger than the outer diameter of the connecting portion 21, so that the entire locking portion protrudes outward along the radial direction of the connecting portion 21. During installation, the protruding part of one end of the locking portion connected to the connecting portion overlaps the end of one end of the quick connector 4 connected to the locking nut 1;

[0045] The thickness of the locking portion protruding outward is the same as the thickness of the end of the quick connector 4 connected to the locking nut 1, so that the sealing is achieved without affecting the threaded connection between the locking nut 1 and the quick connector 4;

[0046] The outer diameter of the locking portion is slightly smaller than the inner diameter of the locking nut 1, so that when the locking portion is installed in the locking nut 1, it abuts against the locking nut 1;

[0047] In one embodiment of the present application, the specific structure of the locking portion is:

[0048] The locking portion includes a connecting ring 22 and a plurality of locking teeth 23 arranged at intervals, and the plurality of locking teeth 23 are evenly arranged in an annular direction along the connecting ring 22;

[0049] One end of the locking teeth 23 is fixedly connected to the connecting ring 22, and the other ends of the locking teeth 23 are not connected to each other. The angle between the locking teeth 23 and the tangent of the connecting ring 22 is 15-30°; the cross-section of the locking teeth 23 is a trapezoidal structure, wherein the upper base of the trapezoidal structure is arranged toward the inner side of the connecting ring 22, wherein the upper base size of the trapezoidal structure is larger than the lower base size, so that the top view of the locking teeth 23 is attached Figure 6 As shown, a vortex-like shape is formed, and the rotation direction is consistent with the thread direction of the locking nut 1. During installation, the locking nut 1 rotates to make the locking teeth 23 close to each other, thereby achieving sealing;

[0050] The width of the connecting ring 22 is equal to the sum of the thickness of one end of the quick connector 4 connected to the locking nut 1 and the thickness of the connecting portion 21;

[0051] The inner diameter of the connecting ring 22 is the same as the inner diameter of the connecting portion 21, and the connecting ring, the locking teeth 23 and the connecting portion 21 are integrally formed;

[0052] The thickness of the cylindrical structure formed by the locking teeth 23 as a whole is the same as the ring width of the connecting ring 22;

[0053] The quick connector 4 is a conventional pipe connector, one end of which is connected to the pipe connector, and the other end of the quick connector 4 is connected to the connecting pipe / connector, wherein the connecting pipe / connector is inserted into the quick connector 4, and the sealing sleeve 3 is sleeved on one end of the connecting pipe / connector inserted into the quick connector 4, and the ends of the sealing sleeve 3 are pressed against the inner wall of the quick connector 4 and the end of the locking sleeve 2 respectively, the inner side wall of the sealing sleeve 3 is pressed against the connecting pipe / connector, and the outer side wall of the sealing sleeve 3 is pressed against the inner side wall of the locking sleeve 2, and then the locking nut 1 passes through the connecting pipe / connector and is threadedly connected to the quick connector 4 to fix the entire sealing assembly in the quick connector 4.

[0054] In one embodiment of the present application, an internal thread matching the external thread of the quick connector 4 is provided at one end of the locking nut 1 facing the quick connector 4, and the nominal length of the internal thread is greater than the length of the locking portion, so that the locking nut 1 can be buckled outside the locking portion and threadedly connected to the quick connector 4.

[0055] The above are only a few embodiments of the present application and do not constitute any form of limitation to the present application. Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with the profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A secondary locking device for a quick connector, characterized in that: include: Lock nut and seal assembly; One end of the sealing assembly is inserted into the quick connector, and the other end of the sealing assembly is inserted into the locking nut. The sealing assembly includes a sealing sleeve and a locking sleeve. The locking nut is buckled on an end of the sealing assembly facing away from the quick connector, and the locking nut is threadedly connected to the quick connector; The sealing sleeve is inserted into the locking sleeve, one end of the sealing sleeve extends outward from the locking sleeve and extends outward in the radial direction, one side of the outwardly extending portion of the sealing sleeve presses against the inner wall of the quick connector, and the other side of the outwardly extending portion of the sealing sleeve abuts against the locking sleeve; One end of the locking sleeve is inserted into the quick connector, and the other end of the locking sleeve is inserted into the locking nut, and the locking sleeve includes a connecting portion and a locking portion arranged along the axial direction; One end of the connecting portion faces the quick connector, and the other end of the connecting portion is connected to a locking portion; The locking portion extends outwardly along the radial direction of the connecting portion, and one end of the locking portion and the connecting portion overlaps the end of the quick connector facing the locking nut, and the locking portion presses against the inner side of the locking nut.

2. A secondary locking device for a quick connector according to claim 1, characterized in that: The sealing sleeve and the locking sleeve are both elastic sealing parts.

3. A secondary locking device for a quick connector according to claim 1, characterized in that: The locking portion includes a plurality of locking teeth arranged at intervals; A plurality of locking teeth are evenly arranged at the end of the sealing sleeve, and a plurality of locking teeth are circumferentially arranged along the circumference of the sealing sleeve. One end of the locking tooth is fixedly connected to the connecting portion, and the other end of the locking tooth faces away from the connecting portion.

4. A secondary locking device for a quick connector according to claim 3, characterized in that: The cross section of the locking teeth is a trapezoidal structure.

5. A secondary locking device for a quick connector according to claim 3, characterized in that: The sum of the length of the connecting portion and the thickness of the portion of the sealing sleeve extending outward is the same as the length of the connecting end of the quick connector toward the locking nut.

6. A secondary locking device for a quick connector according to claim 3, characterized in that: The outer dimensions of the portion of the sealing sleeve extending outward are the same as the outer dimensions of the connecting portion.

7. A secondary locking device for a quick connector according to claim 3, characterized in that: The outer dimension of the locking portion is smaller than the inner diameter of the locking nut, and the length of the locking portion is smaller than the height of the locking nut.

8. A secondary locking device for a quick connector according to claim 1, characterized in that: The length of the sealing sleeve is greater than the length of the locking sleeve.

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