Self-locking thin-wall stainless steel quick connecting pipe fitting

Abstract

The utility model provides a self-locking thin-wall stainless steel quick connecting pipe fitting which comprises a pipe fitting body, a sealing ring, a check ring and a gear ring. The sealing ring, the check ring and the gear ring are sequentially embedded in a socket of the pipe fitting body from inside to outside, a first annular step and a second annular step are arranged on the inner wall of the socket, and an annular folded edge is arranged at the outer end of the socket. The sealing ring is axially limited between the first annular step and the check ring, and the check ring and the gear ring are limited between the second annular step and the annular folded edge. A plurality of barb-shaped ratchets are evenly distributed on the inner wall of the gear ring in the circumferential direction, after one end of a pipeline is inserted into the end of the pipe fitting body, the inner circumferential wall of the sealing ring is used for being tightly attached to the outer circumferential wall of the pipeline in a sealed mode, and the barb-shaped ratchets are used for being clamped with the outer wall of the pipeline in an engaged mode. According to the utility model, the barb-shaped ratchets can be engaged and clamped with the outer wall of the pipeline without the help of a clamping and pressing tool, so that convenience can be brought to the connection and fixation of the pipeline and the pipe fitting body.

Description

Technical Field

[0001] The utility model relates to the technical field of connecting pipe fittings, and particularly relates to a self-locking thin-wall stainless steel quick-connecting pipe fitting. Background Art

[0002] At present, when connecting a pipe joint with a pipe, the caulking method is increasingly used to connect the two, that is, the existing pipe joint includes a pipe fitting body, a sealing ring, a retaining ring and a toothed ring; the sealing ring, the retaining ring and the toothed ring are embedded in the socket of the pipe fitting body in sequence from inside to outside. After one end of the pipe is inserted into the end of the pipe fitting body and the socket of the pipe fitting body is caulked by a caulking tool, the inner peripheral wall of the sealing ring can be closely attached to and sealed with the outer peripheral wall of the pipe, and the toothed ring can clamp the pipe, that is, the connection and fixation of the pipe fitting body are realized and circumferential sealing is achieved; however, in the above connection structure between the pipe and the pipe fitting body, the connection and fixation of the pipe and the pipe fitting body need to be realized after the socket of the pipe fitting body is caulked by a caulking tool, so there is a disadvantage that the connection between the pipe and the pipe fitting body is inconvenient. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a self-locking thin-wall stainless steel quick-connecting pipe fitting, in which, without the aid of a caulking tool, the barbed spines can be engaged and clamped with the outer wall of the pipe, that is, the connection and fixation of the pipe and the pipe fitting body are realized, thus bringing convenience to the connection and fixation of the pipe and the pipe fitting body.

[0004] The utility model provides a self-locking thin-wall stainless steel quick-connecting pipe fitting, which includes a pipe fitting body, a sealing ring, a retaining ring and a toothed ring; the sealing ring, the retaining ring and the toothed ring are embedded in the socket of the pipe fitting body in sequence from inside to outside. The inner wall of the socket is provided with a first annular step and a second annular step, and the outer end of the socket is provided with an annular flange, and the annular flange is folded inwards in the radial direction of the pipe fitting body; the sealing ring is axially limited between the first annular step and the retaining ring, and the retaining ring and the toothed ring are limited between the second annular step and the annular flange; a plurality of barbed spines are circumferentially and evenly distributed on the inner wall of the toothed ring. After one end of the pipe is inserted into the end of the pipe fitting body, the inner peripheral wall of the sealing ring is used for closely attaching to and sealing with the outer peripheral wall of the pipe, and the plurality of barbed spines are used for engaging and clamping with the outer wall of the pipe.

[0005] After the present utility model adopts the above structure, since a number of barbed spines are circumferentially and uniformly distributed on the inner wall of the toothed ring, after one end of the pipe is inserted into the end of the pipe fitting body, the inner peripheral wall of the sealing ring can be closely attached to and sealed with the outer peripheral wall of the pipe, and a number of barbed spines can bite and clamp the outer wall of the pipe. That is, without the aid of a crimping tool, the barbed spines can achieve the purpose of biting and clamping the outer wall of the pipe, which also realizes the connection and fixation of the pipe and the pipe fitting body, thus bringing convenience to the connection and fixation of the pipe and the pipe fitting body.

[0006] In a possible implementation manner, the toothed ring includes a support ring, the outer side wall of the support ring abuts against the inner wall of the socket, and a number of barbed spines are arranged on the inner side in the radial direction of the support ring. The outer end of each barbed spine is integrally connected to the outer end of the support ring. After adopting this structure, since the outer side wall of the support ring abuts against the inner wall of the socket, the support ring can play a reliable supporting role for the barbed spines. Furthermore, after one end of the pipe is inserted into the end of the pipe fitting body, a number of barbed spines can reliably bite and clamp the outer wall of the pipe, so as to achieve the purpose of clamping and preventing disconnection between the pipe and the pipe fitting body, that is, it can ensure the reliable biting between the pipe and the pipe fitting body.

[0007] In a possible implementation manner, the inner end of each barbed spine forms a "V"-shaped bayonet. After adopting this structure, the inner end of the barbed spine can bite more reliably on the outer wall of the pipe, that is, it can further increase the friction between the barbed spine and the outer wall of the pipe, thereby further increasing the tensile strength between the pipe and the pipe fitting body.

[0008] In a possible implementation manner, a ring-shaped extension section is bent on the inner end of the support ring, and the extension section extends towards the center of the support ring along the radial direction of the support ring, and the extension section abuts against the retaining ring. After bending a ring-shaped extension section on the inner end of the support ring, it can not only improve the structural strength and anti-deformation strength of the support ring itself, that is, enable the support ring to play a reliable supporting role for the barbed spines to ensure the reliability of the biting and clamping between the barbed spines and the outer wall of the pipe, but also enable the support ring to reliably abut against the retaining ring.

[0009] In a possible implementation, an annular recess is provided on the inner end portion of the sealing ring. The inner side wall of the annular recess forms an annular inclined surface, which is inclined from the opening side of the annular recess along the axial direction of the sealing ring towards the side away from the center of the sealing ring. After adopting this structure, when one end of the pipe is inserted into the end portion of the pipe fitting body and the pipe and the pipe fitting body are clamped and engaged, when water flows through the pipe, the water pressure can be applied to the annular inclined surface. Since the annular inclined surface is inclined from the opening side of the annular recess along the axial direction of the sealing ring towards the side away from the center of the sealing ring, under the action of the water pressure, the sealing ring located inside the annular inclined surface can be pressed tightly against the outer wall of the pipe, that is, the circumferential sealing effect between the sealing ring and the pipe can be further improved. In addition, the greater the water pressure in the pipe, the greater the pressure acting on the annular inclined surface, that is, the better the tight sealing effect between the sealing ring located inside the annular inclined surface and the outer wall of the pipe.

[0010] In a possible implementation, an annular guiding surface is provided on the inner circumferential wall of the outer end portion of the sealing ring. The annular guiding surface is used to cooperate with the outer wall of one end of the pipe for guiding so as to facilitate the insertion of the pipe into the sealing ring. After providing the annular guiding surface on the inner circumferential wall of the outer end portion of the sealing ring, during the process of inserting one end of the pipe into the pipe fitting body, the annular guiding surface can cooperate with the outer wall of one end of the pipe for guiding so as to facilitate the insertion of the pipe into the sealing ring, that is, it can bring convenience to the process of the pipe passing through the sealing ring and can avoid the situation that the end portion of the pipe presses and damages the sealing ring.

[0011] In a possible implementation, a third annular step is provided on the inner wall of the pipe fitting body. One end of the pipe abuts against the second annular step to achieve the limitation of the pipe fitting body and the pipe. After adopting this structure, after one end of the pipe is inserted into the end portion of the pipe fitting body, one end of the pipe can abut against the third annular step to achieve the limitation of the pipe fitting body and the pipe, that is, it can limit the depth of the pipe inserted into the pipe fitting body, thereby bringing convenience to the connection between the pipe and the pipe fitting body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic cross-sectional structure diagram after the pipe and the pipe fitting body are connected;

[0013] Figure 2 is Figure 1 the enlarged structure diagram at A in

[0014] Figure 3 It is a left view structure diagram of the tooth ring;

[0015] Figure 4 It is a schematic cross-sectional structure diagram of the sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] First of all, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the embodiments of this application, and are not intended to limit the protection scope of the embodiments of this application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.

[0017] In the description of the embodiments of this application, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of this application can be understood according to specific situations.

[0018] In the embodiments of this application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal height than the second feature.

[0019] The following further elaborates on this application in detail with reference to the accompanying drawings and specific embodiments.

[0020] See Figures 1-4 As shown, the embodiments of this application disclose a self-locking thin-walled stainless steel quick-connect pipe fitting, including a pipe fitting body 1, a sealing ring 2, a retaining ring 3, and a toothed ring 4; the sealing ring 2, the retaining ring 3, and the toothed ring 4 are sequentially embedded in the socket 11 of the pipe fitting body 1 from the inside out. The inner wall of the socket 11 is provided with a first annular step 12 and a second annular step 13, and the outer end of the socket 11 is provided with an annular flange 14, and the annular flange 14 is folded inward along the radial direction of the pipe fitting body 1; the sealing ring 2 is axially limited between the first annular step 12 and the retaining ring 3, and the retaining ring 3 and the toothed ring 4 are limited between the second annular step 13 and the annular flange 14; a plurality of barbed ratchet teeth 41 are circumferentially distributed on the inner wall of the toothed ring 4. After one end of the pipe 5 is inserted into the end of the pipe fitting body 1, the inner peripheral wall of the sealing ring 2 is used to tightly seal against the outer peripheral wall of the pipe 5, and the plurality of barbed ratchet teeth 41 are used to bite and clamp the outer wall of the pipe 5; the above pipe fitting body can be a straight-through, elbow, tee, or other pipe joint components.

[0021] The tooth ring 4 includes a support ring 42. The outer sidewall of the support ring 42 abuts against the inner wall of the socket 11. A number of barbed spines 41 are arranged on the inner side in the radial direction of the support ring 42. The outer end of each barbed spine 41 is integrally connected to the outer end of the support ring 42. After adopting this structure, since the outer sidewall of the support ring abuts against the inner wall of the socket, the support ring can play a reliable supporting role for the barbed spines. Further, after one end of the pipe is inserted into the end of the pipe fitting body, a number of barbed spines can reliably bite and clamp on the outer wall of the pipe, so as to realize the clamping and anti-disconnection purpose between the pipe and the pipe fitting body, that is, it can ensure the reliable biting between the pipe and the pipe fitting body.

[0022] The inner end of each barbed spine 41 forms a "V"-shaped bayonet 411. After adopting this structure, the inner end of the barbed spine can bite more reliably on the outer wall of the pipe, that is, it can further increase the friction between the barbed spine and the outer wall of the pipe, thereby further increasing the tensile strength between the pipe and the pipe fitting body.

[0023] The inner end of the support ring 42 is bent to form an annular extension section 43. The extension section 43 extends toward the center of the support ring 42 along the radial direction of the support ring 42. The extension section 43 abuts against the retaining ring 3. After bending the inner end of the support ring to form an annular extension section, it can not only improve the structural strength and anti-deformation strength of the support ring itself, that is, enable the support ring to play a reliable supporting role for the barbed spines to ensure the reliability of the biting and clamping between the barbed spines and the outer wall of the pipe, but also enable the support ring to reliably abut against the retaining ring.

[0024] An annular recess 21 is provided on the inner end of the sealing ring 2. The inner sidewall of the annular recess 21 forms an annular inclined surface 22. The annular inclined surface 22 is inclined from the opening side of the annular recess 21 along the axial direction of the sealing ring 2 toward the side away from the center of the sealing ring 2. After adopting this structure, when one end of the pipe is inserted into the end of the pipe fitting body and the pipe and the pipe fitting body are clamped and bitten, when water flows through the pipe, the water pressure can be applied to the annular inclined surface. Since the annular inclined surface is inclined from the opening side of the annular recess along the axial direction of the sealing ring toward the side away from the center of the sealing ring, under the action of the water pressure, the sealing ring located inside the annular inclined surface can be pressed against the outer wall of the pipe, that is, it can further improve the circumferential sealing effect between the sealing ring and the pipe. In addition, the greater the water pressure in the pipe, the greater the pressure acting on the annular inclined surface, that is, the better the tight sealing effect between the sealing ring located inside the annular inclined surface and the outer wall of the pipe.

[0025] An annular guiding surface 23 is provided on the inner peripheral wall of the outer end of the sealing ring 2. The annular guiding surface 23 is used for cooperating with the outer wall of one end of the pipeline 5 for guiding so as to facilitate the insertion of the pipeline 5 into the sealing ring 2. After the annular guiding surface is provided on the inner peripheral wall of the outer end of the sealing ring, during the process of inserting one end of the pipeline into the fitting body, the annular guiding surface can cooperate with the outer wall of one end of the pipeline for guiding so as to facilitate the insertion of the pipeline into the sealing ring, that is, it can bring convenience to the process of the pipeline passing through the sealing ring, and can avoid the situation that the end of the pipeline presses and damages the sealing ring.

[0026] A third annular step 15 is provided on the inner wall of the fitting body 1. One end of the pipeline 5 abuts against the second annular step 13 to realize the limit of the fitting body 1 and the pipeline 5. After adopting this structure, after one end of the pipeline is inserted into the end of the fitting body, one end of the pipeline can abut against the third annular step to realize the limit of the fitting body and the pipeline, that is, it can limit the depth of the pipeline inserted into the fitting body, thus bringing convenience to the connection between the pipeline and the fitting body.

[0027] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any change or replacement that can be easily thought of by those skilled in the technical field of the present application within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A self-locking thin-walled stainless steel quick-connect fitting, comprising a fitting body (1), a sealing ring (2), a retaining ring (3) and a toothed ring (4); the sealing ring (2), the retaining ring (3) and the toothed ring (4) are sequentially embedded in the socket (11) of the fitting body (1) from inside to outside, a first annular step (12) and a second annular step (13) are provided on the inner wall of the socket (11), an annular flange (14) is provided on the outer end of the socket (11), and the annular flange (14) is folded inward along the radial direction of the fitting body (1); the sealing ring (2) is axially limited between the first annular step (12) and the retaining ring (3), and the retaining ring (3) and the toothed ring (4) are limited between the second annular step (13) and the annular flange (14); characterized in that: A plurality of barbed ratchet teeth (41) are circumferentially and uniformly distributed on the inner wall of the toothed ring (4). After one end of the pipe (5) is inserted into the end of the pipe fitting body (1), the inner peripheral wall of the sealing ring (2) is used to closely contact and seal the outer peripheral wall of the pipe (5), and the plurality of barbed ratchet teeth (41) are used to bite and clamp the outer wall of the pipe (5).

2. The self-locking thin-wall stainless steel quick-connect pipe fitting according to claim 1, wherein: The toothed ring (4) includes a support ring (42), the outer side wall of the support ring (42) abuts against the inner wall of the socket (11), and a plurality of the barbed ratchet teeth (41) are arranged on the inner side in the radial direction of the support ring (42), and the outer end of each barbed ratchet tooth (41) is integrally connected to the outer end of the support ring (42).

3. The self-locking thin-wall stainless steel quick-connect pipe fitting according to claim 1 or 2, characterized in that: The inner end of each barbed ratchet tooth (41) forms a "V"-shaped bayonet (411).

4. The self-locking thin-wall stainless steel quick-connect pipe fitting according to claim 2, wherein: An annular extension section (43) is bent and formed on the inner end of the support ring (42), and the extension section (43) extends towards the center of the support ring (42) along the radial direction of the support ring (42), and the extension section (43) abuts against the retaining ring (3).

5. The self-locking thin-walled stainless steel quick-connect fitting according to claim 1, wherein: An annular recess (21) is provided on the inner end of the sealing ring (2), and the inner side wall of the annular recess (21) forms an annular inclined surface (22), and the annular inclined surface (22) is inclined from the opening side of the annular recess (21) along the axial direction of the sealing ring (2) towards the side away from the center of the sealing ring (2).

6. The self-locking thin-wall stainless steel quick-connect pipe fitting according to claim 1, wherein: An annular guiding surface (23) is provided on the inner peripheral wall of the outer end of the sealing ring (2), and the annular guiding surface (23) is used to cooperate with the outer wall of one end of the pipe (5) for guiding so as to facilitate the insertion of the pipe (5) into the sealing ring (2).

7. The self-locking thin-wall stainless steel quick-connect pipe fitting according to claim 1, wherein: A third annular step (15) is provided on the inner wall of the pipe fitting body (1), and one end of the pipe (5) abuts against the second annular step (13) to realize the limitation of the pipe fitting body (1) and the pipe (5).

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