Pipeline joint

Abstract

The present application discloses a pipe joint for connecting a first pipe and a second pipe, characterized in that the pipe joint comprises: a joint body fastened to the first pipe at one end and releasably engaged with the second pipe at the opposite end; a locking nut releasably fixed to the joint body or releasably fixed to a first pipe fastened to the joint body, and provided with a tapered surface on the inner side; and the locking ring is arranged between the locking nut and the joint main body and is operably fastened to the second pipeline.

Description

Technical Field

[0001] The present application relates to the field of pipeline connection arrangement, and in particular to a pipeline joint. Background Art

[0002] In the prior art, the connection method of aluminum-plastic pipes and PE-RT (heat-resistant polyethylene) pipe joints is mainly to seal and tighten inside the pipe. However, this connection method has some problems. First, the joint occupies the inner diameter space of the pipe, reduces the inner diameter of the pipe, affects the overall flow rate, and reduces the fluid transportation efficiency in the pipe. Secondly, the sealing ring is usually very thin and easily damaged during the installation process. In addition, some connection methods require the use of special tools, such as hydraulic pliers or pressure pliers, which increases the complexity and cost of installation. Some joints cannot be disassembled once crimped, which is not conducive to later maintenance. For PE-RT floor heating pipes, the thicker wall of the joint will also occupy the space on the inner wall of the pipe, affecting the water flow and heat dissipation effect.

[0003] Some connection methods, such as those used for PE (polyethylene) pipes, are prone to leaks and even cracking under high water pressure. Plastic threads wear easily after repeated assembly and disassembly, making assembly and disassembly difficult. For PPR (polypropylene type III) pipe connections, existing technology is primarily suitable for pipes with higher hardness, limiting its application.

[0004] In summary, the existing pipe connection method has problems such as limited flow, inconvenient installation, easy damage, and difficult maintenance. A new technical solution is needed to solve these problems. Utility Model Content

[0005] In order to solve the above technical problems, the present application proposes a pipe joint. Compared with the prior art, the pipe joint according to the present application has a sealing member disposed in the installation cavity, thereby not occupying the inner cavity space of the pipe.

[0006] The present application discloses a pipe joint for connecting a first pipe and a second pipe, characterized in that the pipe joint includes: a joint body, which is fastened to the first pipe at one end and releasably engages the second pipe at the opposite end; a locking nut, which is releasably fixed to the joint body or releasably fixed to the first pipe fastened to the joint body and has a tapered surface on the inner side; and a locking ring, which is arranged between the locking nut and the joint body and is operably fastened to the second pipe.

[0007] According to an optional embodiment, the inner diameter of the locking ring is the same as the outer diameter of the second pipe; the locking ring is provided with conical surfaces at two opposite ends to respectively abut against the joint body and the locking nut in the installed state; and the locking ring includes an axially extending fracture.

[0008] According to an optional embodiment, the locking ring is disposed in a mounting cavity formed between an end portion of the locking nut and an end portion of the connector body.

[0009] According to an optional embodiment, the pipe joint includes a support ring; the support ring is made of metal and includes a pipe portion and a flange portion arranged at one end of the pipe portion; the pipe portion of the support ring is slidably arranged on the inner side of the second pipe and radially abuts against the inner wall of the second pipe; the inner diameter of the pipe portion of the support ring is the same as the inner diameter of a part of the joint body; the outer diameter of the pipe portion of the support ring is the same as the inner diameter of the second pipe; the flange portion of the support ring abuts against the second pipe in the axial direction and is arranged between the second pipe and the joint body; and the outer diameter of the flange portion of the support ring is the same as the outer diameter of the second pipe.

[0010] According to an optional embodiment, the joint body includes a first joint portion, a second joint portion and a joint conical surface; the first joint portion is arranged at one end of the joint body and is releasably engaged with the locking nut; the inner diameter of the first joint portion is the same as the outer diameter of the second pipe; the second joint portion is arranged at the other end of the joint body opposite to the first joint portion and is fastened to the first pipe; the inner diameter of the second joint portion is the same as the inner diameter of the tube portion of the support ring; the joint conical surface is arranged at the end of the first joint portion, and its cone angle is set to be the same as the cone angle of the corresponding cone surface of the locking ring; and the cone angle of the cone surface of the locking nut is set to be the same as the cone angle of the corresponding cone surface of the locking ring.

[0011] According to an optional embodiment, the joint body includes a sealing ring groove and a sealing ring; the sealing ring groove is provided on the inner wall of the first joint portion; and the sealing ring is provided in the sealing ring groove to operably abut against the outer wall of the second pipe.

[0012] According to an optional embodiment, the joint body includes a first joint, a second joint and a sealing ring; the first joint is arranged at one end of the joint body and includes a lining portion and a support portion; the lining portion of the first joint is slidably arranged on the inner side of the second pipe and radially abuts against the inner wall of the second pipe; the outer diameter of the lining portion of the first joint is the same as the inner diameter of the second pipe; the support portion of the first joint is arranged between the second pipe and the locking nut and abuts against the locking nut axially and radially; the outer diameter of the support portion of the first joint is the same as the outer diameter of the first pipe; the second joint is arranged at the other end of the joint body opposite to the first joint; the outer diameter of the second joint is the same as the inner diameter of the first pipe and is inserted into the first pipe; the inner diameter of the second joint is the same as the inner diameter of the lining portion of the first joint; the sealing ring is arranged between the lining portion and the support portion of the first joint and has a conical surface; and the cone angle of the conical surface of the sealing ring is set to be the same as the cone angle of the corresponding conical surface of the locking ring.

[0013] According to an optional embodiment, the pipe joint includes a support ring; the support ring is made of metal and includes a pipe portion and a flange portion arranged at one end of the pipe portion; a portion of the pipe portion of the support ring is slidably arranged inside the second pipe and radially abuts against the inner wall of the second pipe; another portion of the pipe portion of the support ring is slidably arranged inside the joint body and radially abuts against the inner wall of the joint body; the outer diameter of the pipe portion of the support ring is the same as the inner diameter of a portion of the joint body and the same as the inner diameter of the second pipe; and the flange portion of the support ring abuts against the joint body in the axial direction.

[0014] According to an optional embodiment, the joint body includes a first joint portion and a second joint portion; the first joint portion is arranged at one end of the joint body and includes a conical surface; the first joint portion is arranged between the second pipe and the locking nut, radially abutting the outer wall of the second pipe, and axially and radially abutting the locking nut; the inner diameter of the first joint portion is the same as the outer diameter of the second pipe; the cone angle of the conical surface of the first joint portion is set to be the same as the cone angle of the corresponding conical surface of the locking ring; the second joint portion is arranged at the other end of the joint body opposite to the first joint portion; the outer diameter of the second joint portion is the same as the inner diameter of the first pipe, and can be operably inserted into the first pipe; and the inner diameter of the second joint portion is the same as the outer diameter of the tube portion of the support ring.

[0015] According to an optional embodiment, the joint body includes a sealing ring groove and a sealing ring; the sealing ring groove is arranged on the inner wall of the first joint part and on the outer wall of the second joint part; and the sealing ring is arranged in the sealing ring groove to operably abut against the inner wall of the first pipe and the outer wall of the second pipe.

[0016] The pipe joint according to the present application effectively solves the problem of the pipe inner diameter being occupied by the joint components, thereby improving the pipe flow rate and fluid delivery efficiency. The pipe joint according to the present application adopts a snap-fit connection method, which simplifies the installation process, reduces the need for special tools, and reduces the cost and difficulty of installation. At the same time, the pipe joint according to the present application includes a limiting structure and a fastening structure, which enhances the stability and safety of the connection and reduces the risk of damage to the joint components and water leakage. The pipe joint according to the present application has a simple structure, is easy to install, has strong versatility, and is suitable for various pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other aspects of the present application will be more fully understood from the detailed description below in conjunction with the following drawings. It should be noted that the scales of the drawings may be different for the purpose of clarity of illustration, but this will not affect the understanding of the present application.

[0018] Figure 1 It is an exploded perspective view of the pipe joint according to the present application.

[0019] Figure 2 yes Figure 1Cross-sectional view of a pipe joint.

[0020] Figure 3 yes Figure 1 Cross-section of the pipe joint in the installed state.

[0021] Figure 4 is a cross-sectional view of a pipe joint in an installed state according to another embodiment of the present application.

[0022] Figure 5 is a cross-sectional view of a pipe joint in an installed state according to another embodiment of the present application. DETAILED DESCRIPTION

[0023] The following describes exemplary embodiments of the present application in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Instead, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0024] Figure 1 It is an exploded perspective view of the pipe joint according to the present application. Figure 2 yes Figure 1 Cross-sectional view of a pipe joint. Figure 3 yes Figure 1 Cross-sectional view of the pipe joint in the installed state. Figure 1-3 As shown, the pipe joint is used to connect a first pipe (not shown) and a second pipe 3, and includes a joint body 1, a support ring 2, a locking nut 5 and a locking ring 4. The joint body 1 is fastened to the first pipe at one end and releasably engages the second pipe 3 at the opposite other end. The support ring 2 is made of metal and includes a pipe portion and a flange portion arranged at one end of the pipe portion. The pipe portion is slidably arranged inside the second pipe 3 and radially abuts the inner wall of the second pipe 3. The inner diameter of the pipe portion is the same as the inner diameter of a part of the joint body 1. The outer diameter of the pipe portion is the same as the inner diameter of the second pipe 3. The flange portion abuts the second pipe 3 axially and is arranged between the second pipe 3 and the joint body 1. The outer diameter of the flange portion is the same as the outer diameter of the second pipe 3. The locking nut 5 is releasably fixed to the joint body 1, for example, by being screwed onto the joint body 1 by means of a threaded connection. The locking nut 5 is provided with a conical surface on the inside. Locking ring 4 is disposed between locking nut 5 and fitting body 1, specifically within a mounting cavity formed between the ends of locking nut 5 and fitting body 1, and surrounds second pipe 3. The inner diameter of locking ring 4 is the same as the outer diameter of second pipe 3. Locking ring 4 has tapered surfaces at its opposite ends, respectively, to abut against fitting body 1 and locking nut 5, respectively, when installed. Locking ring 4 includes an axially extending cutout.

[0025] The joint body 1 is generally cylindrical and includes a first engaging portion 11, a second engaging portion 12, an engaging conical surface 13, a sealing ring 14, and a sealing ring groove 15. The first engaging portion 11 is provided at one end of the joint body 1 for releasably engaging with the lock nut 5, for example, being screwed into the lock nut 5 by a threaded connection. In the case where the first engaging portion 11 includes a thread, the lock nut 5 includes a corresponding thread on the inside. The inner diameter of the first engaging portion 11 is the same as the outer diameter of the second pipe 3. The second engaging portion 12 is provided at the other end of the joint body 1 opposite to the first engaging portion 11, for being fastened to the first pipe, for example, by a threaded connection or an interference fit. The inner diameter of the second engaging portion 12 is the same as the inner diameter of the pipe portion of the support ring 2. The engaging conical surface 13 is provided at the end of the first engaging portion 11. The cone angle of the engaging conical surface 13 is set to be the same as the cone angle of the corresponding cone surface of the locking ring 4, so that in the installed state, the locking ring 4 can fit tightly with the engaging conical surface 13. Similarly, the cone angle of the conical surface of the locking nut 5 is set to be the same as the cone angle of the corresponding cone surface of the locking ring 4, so that when installed, the locking ring 4 can fit tightly against the locking nut 5. A sealing ring groove 15 is provided on the inner wall of the first joint 11. A sealing ring 14 is disposed in the sealing ring groove 15 and is used to abut against the outer wall of the second pipe 3 in the installed state to provide a seal.

[0026] The following describes the installation process of the pipe joint according to the present application. During installation, first insert the support ring 2 into the second pipe 3. Then, sequentially attach the locking nut 5 and locking ring 4 to the second pipe 3. The second pipe 3 is then inserted into the joint body 1, passing through the sealing ring 14. Next, tighten the locking nut 5. Because the locking ring 4 includes an axially extending cutout, it collapses radially when squeezed by the conical surfaces of the locking nut 5 and the conical surfaces of the joint body 1, thereby locking the second pipe 3 and preventing it from loosening.

[0027] Figure 4 FIG is a cross-sectional view of a pipe joint in an installed state according to another embodiment of the present application. Figure 4As shown, the pipe fitting is used to connect a first pipe 216 and a second pipe 203, and includes a fitting body 201, a locking nut 205, and a locking ring 204. The fitting body 201 is secured to the first pipe 216 at one end and releasably engages the second pipe 203 at the opposite end. The locking nut 205 is releasably secured to the first pipe 216, for example, by screwing onto the first pipe 216. The locking nut 205 has a tapered surface on its inner side. The locking ring 204 is disposed between the locking nut 205 and the fitting body 201, specifically within a mounting cavity formed between the ends of the locking nut 205 and the fitting body 201, and surrounds the second pipe 203. The inner diameter of the locking ring 204 is the same as the outer diameter of the second pipe 203. The locking ring 204 has tapered surfaces on its opposite ends, respectively, to abut against the fitting body 201 and the locking nut 205 when installed. The locking ring 204 includes an axially extending cutout.

[0028] The joint body 201 is roughly cylindrical and includes a first joint portion 211, a second joint portion 212, a sealing ring 213, a sealing ring 214 and a sealing ring groove 215. The first joint portion 211 is arranged at one end of the joint body 201 and includes a lining portion and a support portion. The lining portion of the first joint portion 211 is slidably arranged on the inner side of the second pipe 203 and radially abuts against the inner wall of the second pipe 203. The outer diameter of the lining portion of the first joint portion 211 is the same as the inner diameter of the second pipe 203. The support portion of the first joint portion 211 is arranged between the second pipe 203 and the locking nut 205 and abuts against the locking nut 205 in the axial and radial directions. The second joint portion 212 is arranged at the other end of the joint body 201 opposite to the first joint portion 211. The second joint portion 212 is used to be inserted into the first pipe 216. The inner diameter of the second joint portion 212 is the same as the inner diameter of the lining portion of the first joint portion 211. The sealing ring 213 is disposed between the inner lining portion and the support portion of the first joint portion 211 and has a conical surface. The cone angle of the conical surface of the sealing ring 213 is set to be the same as the cone angle of the corresponding conical surface of the locking ring 204, so that the locking ring 204 can fit tightly with the sealing ring 213 when installed. Similarly, the cone angle of the conical surface of the locking nut 205 is set to be the same as the cone angle of the corresponding conical surface of the locking ring 204, so that the locking ring 204 can fit tightly with the locking nut 205 when installed. A plurality of sealing ring grooves 215 are respectively disposed on the inner wall of the first joint portion 211 and the outer wall of the second joint portion 212, specifically, on the inner wall of the first joint portion 211 that abuts the second pipe 203 and on the outer wall of the second joint portion 212 that abuts the first pipe 216. The sealing ring 214 is disposed in the sealing ring groove 215 and is configured to abut against the inner wall of the first pipe 216 and the outer wall of the second pipe 203 in the installed state to provide sealing.

[0029] Figure 5 FIG is a cross-sectional view of a pipe joint in an installed state according to another embodiment of the present application. Figure 5 As shown, the pipe joint is used to connect a first pipe 316 and a second pipe 303, and includes a joint body 301, a support ring 302, a lock nut 305, and a lock ring 304. The joint body 301 is fastened to the first pipe 316 at one end and releasably engages the second pipe 303 at the opposite end. The support ring 302 is made of metal and includes a tube portion and a flange portion disposed at one end of the tube portion. A portion of the tube portion is slidably disposed inside the second pipe 303 and radially abuts the inner wall of the second pipe 303. Another portion of the tube portion is slidably disposed inside the joint body 301 and radially abuts the inner wall of the joint body 301. The outer diameter of the tube portion is the same as the inner diameter of a portion of the joint body 301 and the same as the inner diameter of the second pipe 303. The flange portion abuts the joint body 301 axially. The lock nut 305 is releasably secured to the first pipe 316, for example, by being screwed onto the first pipe 316 via a threaded connection. The locking nut 305 has a tapered surface on its inner side. The locking ring 304 is disposed between the locking nut 305 and the connector body 301, specifically within a mounting cavity formed between the ends of the locking nut 305 and the connector body 301, and surrounds the second pipe 303. The inner diameter of the locking ring 304 is the same as the outer diameter of the second pipe 303. The locking ring 304 has tapered surfaces on its two opposing ends, respectively, to abut against the connector body 301 and the locking nut 305 when installed. The locking ring 304 includes an axially extending cutout.

[0030] The connector body 301 is generally cylindrical and includes a first engaging portion 311, a second engaging portion 312, a sealing ring 314, and a sealing ring groove 315. The first engaging portion 311 is disposed at one end of the connector body 301 and includes a tapered surface. The first engaging portion 311 is disposed between the second pipe 303 and the locking nut 305, radially abutting the outer wall of the second pipe 303 and axially and radially abutting the locking nut 305. The inner diameter of the first engaging portion 311 is the same as the outer diameter of the second pipe 303. The tapered angle of the tapered surface of the first engaging portion 311 is configured to be the same as the tapered angle of the corresponding tapered surface of the locking ring 304, allowing the locking ring 304 to fit tightly against the first engaging portion 311 when installed. Similarly, the tapered angle of the tapered surface of the locking nut 305 is configured to be the same as the tapered angle of the corresponding tapered surface of the locking ring 304, allowing the locking ring 304 to fit tightly against the locking nut 305 when installed. The second engaging portion 312 is provided at the other end of the joint body 301 opposite to the first engaging portion 311. The second engaging portion 312 is configured to be inserted into the first pipe 316. The inner diameter of the second engaging portion 312 is the same as the outer diameter of the tube portion of the support ring 302. A plurality of sealing ring grooves 315 are provided on the inner wall of the first engaging portion 311 and the outer wall of the second engaging portion 312, specifically, on the inner wall of the first engaging portion 311 that abuts the second pipe 303 and on the outer wall of the second engaging portion 312 that abuts the first pipe 316. A sealing ring 314 is provided in the sealing ring groove 315 and is configured to abut against the inner wall of the first pipe 316 and the outer wall of the second pipe 303, respectively, in the installed state to provide a seal.

[0031] The foregoing description of the embodiments has been provided for illustrative and descriptive purposes. It is not intended to be exhaustive or to limit the embodiments to the variations described. Many modifications and variations will be apparent to those skilled in the art. The embodiments were selected and described to best illustrate the principles and practical applications, thereby enabling those skilled in the art to understand the embodiments in their various embodiments and with various modifications as are suitable for their intended use. Within the framework of the embodiments, the components and features described above may be combined between the different embodiments.

Claims

1. A pipe joint for connecting a first pipe and a second pipe, characterized in that: Pipe fittings include: a fitting body that is secured to the first pipe at one end and releasably engages the second pipe at an opposite end; a lock nut that is releasably fixed to the fitting body or to a first pipe fastened to the fitting body and is provided with a tapered surface on an inner side; and A locking ring is disposed between the locking nut and the fitting body and is operably secured to the second pipe.

2. The pipe joint according to claim 1, characterized in that: The inner diameter of the locking ring is the same as the outer diameter of the second pipe; The locking ring is provided with conical surfaces at two opposite ends, respectively, so as to abut against the joint body and the locking nut respectively in the installed state; as well as The locking ring includes an axially extending break.

3. The pipe joint according to claim 2, characterized in that: The locking ring is disposed in a mounting cavity formed between an end portion of the locking nut and an end portion of the joint body.

4. The pipe joint according to claim 3, characterized in that: The pipe joint includes a support ring; The support ring is made of metal and includes a tube portion and a flange portion provided at one end of the tube portion; The tube portion of the support ring is slidably disposed inside the second pipe and radially abuts against the inner wall of the second pipe; The inner diameter of the tubular portion of the support ring is the same as the inner diameter of a portion of the joint body; The outer diameter of the tube portion of the support ring is the same as the inner diameter of the second pipe; The flange portion of the support ring abuts against the second pipe in the axial direction and is disposed between the second pipe and the joint body; and The outer diameter of the flange portion of the support ring is the same as the outer diameter of the second pipe.

5. The pipe joint according to claim 4, characterized in that: The joint body includes a first engaging portion, a second engaging portion and an engaging conical surface; A first engagement portion is provided at one end of the connector body and is releasably engaged with the lock nut; The inner diameter of the first joint portion is the same as the outer diameter of the second pipe; The second engaging portion is provided at the other end of the joint body opposite to the first engaging portion and is fastened to the first pipe; The inner diameter of the second joint portion is the same as the inner diameter of the tube portion of the support ring; The engaging conical surface is provided at an end portion of the first engaging portion, and the conical angle thereof is set to be the same as the conical angle of the corresponding conical surface of the locking ring; and The cone angle of the conical surface of the locking nut is set to be the same as the cone angle of the corresponding conical surface of the locking ring.

6. The pipe joint according to claim 5, characterized in that: The joint body includes a sealing ring groove and a sealing ring; The sealing ring groove is provided on the inner wall of the first joint portion; and The sealing ring is disposed in the sealing ring groove to operably abut against the outer wall of the second pipe.

7. The pipe joint according to claim 3, characterized in that: The joint body includes a first joint portion, a second joint portion and a sealing ring; The first engaging portion is provided at one end of the joint body and includes a lining portion and a supporting portion; The lining portion of the first engaging portion is slidably disposed inside the second pipe and abuts against the inner wall of the second pipe in the radial direction; The outer diameter of the lining portion of the first joint portion is the same as the inner diameter of the second pipe; The supporting portion of the first engaging portion is disposed between the second pipe and the locking nut and abuts against the locking nut in the axial and radial directions; The outer diameter of the supporting portion of the first joint portion is the same as the outer diameter of the first pipe; The second engaging portion is provided at the other end of the joint body opposite to the first engaging portion; The second joint has an outer diameter that is the same as the inner diameter of the first pipe and is inserted into the first pipe; The inner diameter of the second joint portion is the same as the inner diameter of the lining portion of the first joint portion; The sealing ring is provided between the lining portion and the supporting portion of the first joint portion and has a tapered surface; and The cone angle of the cone surface of the sealing ring is set to be the same as the cone angle of the corresponding cone surface of the locking ring.

8. The pipe joint according to claim 3, characterized in that: The pipe joint includes a support ring; The support ring is made of metal and includes a tube portion and a flange portion provided at one end of the tube portion; A portion of the tube portion of the support ring is slidably disposed inside the second pipe and radially abuts against an inner wall of the second pipe; Another portion of the tube portion of the support ring is slidably disposed inside the joint body and abuts against an inner wall of the joint body in a radial direction; The outer diameter of the tube portion of the support ring is the same as the inner diameter of a portion of the joint body and the same as the inner diameter of the second pipe; and The flange portion of the support ring abuts against the joint body in the axial direction.

9. The pipe joint according to claim 8, characterized in that: The joint body includes a first engaging portion and a second engaging portion; The first engaging portion is provided at one end of the joint body and includes a tapered surface; The first engaging portion is provided between the second pipe and the locking nut, abutting against the outer wall of the second pipe in the radial direction and abutting against the locking nut in the axial and radial directions; The inner diameter of the first joint portion is the same as the outer diameter of the second pipe; The cone angle of the conical surface of the first engaging portion is set to be the same as the cone angle of the corresponding conical surface of the locking ring; The second engaging portion is provided at the other end of the joint body opposite to the first engaging portion; The second engaging portion has an outer diameter that is the same as the inner diameter of the first pipe and is operably inserted into the first pipe; and The inner diameter of the second engaging portion is the same as the outer diameter of the tube portion of the support ring.

10. The pipe joint according to claim 7 or 9, characterized in that: The joint body includes a sealing ring groove and a sealing ring; The sealing ring groove is provided on the inner wall of the first joint portion and on the outer wall of the second joint portion; and The sealing ring is disposed in the sealing ring groove to operably abut against the inner wall of the first pipe and the outer wall of the second pipe.

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