Stainless steel pipeline pressure-resistant joint with toothed ring anti-drawing device

Abstract

The utility model provides a stainless steel pipeline pressure-resistant joint with a toothed ring anti-drawing device. The stainless steel pipeline pressure-resistant joint comprises a pipe fitting body, a sealing ring, a check ring and a toothed 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 is arranged on the inner wall of the socket, the outer edge of the sealing ring abuts against the first annular step, an annular folded edge is arranged at the outer end of the socket, and the annular folded edge is folded inwards in the radial direction of the pipe fitting body. The outer edge of the gear ring abuts against the annular folded edge, and the sealing ring, the check ring and the gear ring are axially limited between the first annular step and the annular folded edge. The annular folded edge gradually inclines towards one side of the pipe fitting body from outside to inside in the radial direction of the pipe fitting body and forms an inverted buckling structure, and after the bell mouth is clamped and pressed through a clamping and pressing tool, the inner edge of the annular folded edge is used for being clamped with the outer wall of a pipeline in an engaged mode; the anti-drawing strength of the pipeline and the pipe fitting body can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe connection joints, and in particular to a stainless steel pipe pressure-resistant joint with a tooth ring anti-pull-out device. Background Art

[0002] At present, when a pipe connection joint is connected to a pipe, a clamping method is increasingly used to realize the connection between the two, that is, the existing pipe connection joint includes a pipe fitting body, a sealing ring, a retaining ring and a tooth ring; the sealing ring, the retaining ring and the tooth ring are sequentially embedded in the socket of the pipe fitting body from the inside to the outside. A first annular step is provided on the inner wall of the socket, the outer edge of the sealing ring abuts against the first annular step, a circumferential flange is provided at the outer end of the socket, the circumferential flange is folded inwards in the radial direction of the pipe fitting body, and the outer edge of the tooth ring abuts against the circumferential flange. The sealing ring, the retaining ring and the tooth ring are axially limited between the first annular step and the circumferential flange; when one end of the pipe is inserted into the end of the pipe fitting body and after the socket of the pipe fitting body is clamped by a clamping 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 tooth ring can clamp the pipe; however, in the above connection structure, the pipe and the pipe fitting body are only clamped by the tooth ring, so there is a disadvantage of low anti-disconnection strength. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a stainless steel pipe pressure-resistant joint with a tooth ring anti-pull-out device, which can improve the anti-pull-out strength between the pipe and the pipe fitting body.

[0004] The utility model provides a stainless steel pipe pressure-resistant joint with a tooth ring anti-pull-out device, which includes a pipe fitting body, a sealing ring, a retaining ring and a tooth ring; the sealing ring, the retaining ring and the tooth ring are sequentially embedded in the socket of the pipe fitting body from the inside to the outside. A first annular step is provided on the inner wall of the socket, the outer edge of the sealing ring abuts against the first annular step, a circumferential flange is provided at the outer end of the socket, the circumferential flange is inclined gradually from the outside to the inside in the radial direction of the pipe fitting body towards one side of the pipe fitting body and forms an inverted buckle structure, and when the socket is clamped by a clamping tool, the inner edge of the circumferential flange is used for biting and clamping the outer wall of the pipe.

[0005] After the present utility model adopts the above structure, since the annular folded edge gradually inclines from the outside to the inside in the radial direction of the pipe fitting body towards one side of the pipe fitting body and forms an inverted buckle structure, and when the socket is crimped by a crimping tool, the inner edge of the annular folded edge is used to bite and clamp the outer wall of the pipe. Therefore, when the pipe fitting body and the pipe are crimped by the crimping tool, the annular folded edge can not only limit the axial movement of the tooth ring, but also increase the bonding area between the socket end of the pipe fitting body and the pipe, strengthen the fastening effect, and tightly press the tooth ring, the retaining ring and the sealing ring together with the pipe as a whole, that is, it can improve the tensile strength between the pipe and the pipe fitting body.

[0006] In a possible implementation manner, a plurality of locking teeth are arranged at the inner end of the tooth ring in the axial direction and are spaced apart along the circumferential direction of the tooth ring. Each locking tooth forms a barb structure from the outside to the inside in the radial direction of the tooth ring; after adopting this structure, when the crimping tool crimps the socket of the pipe fitting body so that the socket squeezes the tooth ring and the locking teeth on the tooth ring are crimped with the outer wall of the pipe, since each locking tooth forms a barb structure from the outside to the inside in the radial direction of the tooth ring, that is, a tightly bite and clamped and inverted buckle structure can be formed between the locking tooth and the outer wall of the pipe, thereby increasing the tensile strength after the pipe fitting body and the pipe are crimped.

[0007] In a possible implementation manner, annular notches are provided on the outer edge of the retaining ring and on both sides in the radial direction of the retaining ring; after adopting this structure, when the crimping tool crimps the socket of the pipe fitting body so that the socket squeezes the sealing ring, the retaining ring and the tooth ring, the annular notch on one side of the sealing ring can avoid the sealing ring to prevent the retaining ring from damaging the sealing ring, and the annular notch on one side of the tooth ring can avoid the tooth ring to prevent the retaining ring from squeezing and damaging the tooth ring.

[0008] In a possible implementation manner, a second annular step is provided on the inner wall of the pipe fitting body, and one end of the pipe abuts against the second annular step to realize 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 of the pipe fitting body, one end of the pipe can abut against the second annular step to realize the limitation of the pipe fitting body and the pipe, that is, the depth of the pipe inserted into the pipe fitting body can be limited, thereby facilitating the connection between the pipe and the pipe fitting body. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic cross-sectional structure diagram after the pipe fitting body and the pipe are connected;

[0010] Figure 2 is Figure 1 The enlarged structure diagram at A in

[0011] Figure 3 It is a schematic cross-sectional structure diagram of the tooth ring;

[0012] Figure 4 It is a schematic right view structure diagram of the gear ring;

[0013] Figure 5 It is a schematic sectional view structure diagram of the retaining ring. Specific embodiments

[0014] 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 the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.

[0015] In the description of the embodiments of the present 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 the present application can be understood according to specific circumstances.

[0016] In the embodiments of the present 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 indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0017] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] See Figures 1-5As shown in the figure, an embodiment of the present application discloses a stainless steel pipe pressure-resistant joint with a toothed ring anti-pull-out device, which includes 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. A first annular step 12 is provided on the inner wall of the socket 11, and the outer edge of the sealing ring 2 abuts against the first annular step 12. An annular flange 13 is provided at the outer end of the socket 11, and the annular flange 13 is folded inward along the radial direction of the pipe fitting body 1. The outer edge of the toothed ring 4 abuts against the annular flange 13. The sealing ring 2, the retaining ring 3, and the toothed ring 4 are axially limited between the first annular step 12 and the annular flange 13; when 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 toothed ring 4 is used to clamp the pipe 5; the annular flange 13 gradually inclines from the outside to the inside along the radial direction of the pipe fitting body 1 towards one side of the pipe fitting body 1 and forms an inverted buckle structure. When the socket 11 is pressed by a pressing tool, the inner edge of the annular flange 13 is used to bite and clamp against the outer wall of the pipe 5; the above-mentioned pipe fitting body can be a pipe joint component such as a straight-through, elbow, or tee.

[0019] On the inner end of the toothed ring 4 in the axial direction, a plurality of locking teeth 41 are provided at intervals along the circumferential direction of the toothed ring 4. Each locking tooth 41 forms a barb structure from the outside to the inside along the radial direction of the toothed ring 4; by adopting this structure, when the pressing tool presses the socket of the pipe fitting body to make the socket squeeze the toothed ring and the locking teeth on the toothed ring are pressed against the outer wall of the pipe, since each locking tooth forms a barb structure from the outside to the inside along the radial direction of the toothed ring, that is, a tight bite and clamping can be formed between the locking tooth and the outer wall of the pipe to form an inverted buckle structure, thereby increasing the anti-pull-out strength after the pipe fitting body and the pipe are pressed.

[0020] Annular notches 31 are provided on both sides of the outer edge of the retaining ring 3 in the radial direction of the retaining ring 3; by adopting this structure, when the pressing tool presses the socket of the pipe fitting body to make the socket squeeze the sealing ring, the retaining ring, and the toothed ring, the annular notch on one side of the sealing ring can avoid the sealing ring to prevent the retaining ring from damaging the sealing ring, and the annular notch on one side of the toothed ring can avoid the toothed ring to prevent the retaining ring from squeezing and damaging the toothed ring; in addition, the above-mentioned retaining ring is made of PBT plastic steel material, so that the retaining ring has both the flexibility of plastic to protect the sealing ring from being damaged by the retaining ring during pressing and the strength of steel to enhance the biting strength with the pipe after pressing, so as to improve the anti-disconnection strength and sealing performance of the pipe fitting body and the pipe.

[0021] On the inner wall of the pipe fitting body 1, a second annular step 14 is provided, and one end of the pipe 5 abuts against the second annular step 14 to realize the limitation of the pipe fitting body 1 and the pipe 5; after adopting this structure, after one end of the pipe is inserted into the end of the pipe fitting body, one end of the pipe can abut against the second annular step to realize the limitation of the pipe fitting body and the pipe, that is, the depth of the pipe inserted into the pipe fitting body can be limited, so as to facilitate the connection between the pipe and the pipe fitting body.

[0022] 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 changes or substitutions that can be easily thought of by those skilled in the art 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 stainless steel pipe pressure-resistant joint with a toothed ring anti-pullout device, comprising a pipe 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 a socket (11) of the pipe body (1) from the inside to the outside, a first annular step (12) is provided on the inner wall of the socket (11), the outer edge of the sealing ring (2) abuts against the first annular step (12), an annular folded edge (13) is provided on the outer end of the socket (11), and the The annular folded edge (13) is folded inwardly along the radial direction of the pipe body (1), the outer edge of the toothed ring (4) abuts against the annular folded edge (13), and the sealing ring (2), the retaining ring (3) and the toothed ring (4) are axially limited between the first annular step (12) and the annular folded edge (13); when one end of the pipe (5) is inserted into the end of the pipe body (1), the inner peripheral wall of the sealing ring (2) is used to seal tightly with the outer peripheral wall of the pipe (5), and the toothed ring (4) is used to clamp the pipe (5); the characteristics are: The annular folded edge (13) gradually tilts from outside to inside along the radial direction of the pipe body (1) toward one side of the pipe body (1) to form an undercut structure; when the socket (11) is clamped by a clamping tool, the inner edge of the annular folded edge (13) is used to engage and clamp with the outer wall of the pipe (5).

2. The stainless steel pipe pressure-resistant joint with a toothed ring anti-pullout device according to claim 1, characterized in that: A plurality of latching teeth (41) are arranged on the inner end portion in the axial direction of the gear ring (4) and are spaced apart along the circumferential direction of the gear ring (4). Each of the latching teeth (41) forms a barb structure from outside to inside along the radial direction of the gear ring (4).

3. The stainless steel pipe pressure-resistant joint with a toothed ring anti-pulling device according to claim 1 or 2, characterized in that: Annular notches (31) are provided on the outer edge of the retaining ring (3) and on both sides of the retaining ring (3) in the radial direction.

4. The stainless steel pipe pressure-resistant joint with a toothed ring anti-pullout device according to claim 3 is characterized in that: A second annular step (14) is provided on the inner wall of the pipe body (1), and one end of the pipe (5) abuts against the second annular step (14) to limit the position of the pipe body (1) and the pipe (5).

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