Pipeline joint

Abstract

The utility model relates to the technical field of pipeline joints, aims to solve the problems that an existing pipeline joint is insufficient in pressure resistance, poor in sealing performance, poor in connection stability and tedious in construction, and provides a pipeline joint which comprises two pipelines, and each pipeline comprises a flaring pipe, an inner core and an outer sleeve. The inner core comprises a core body installed in the flaring pipe and a first flange connected to the end of the core body, the core body is installed at the flaring end of the flaring pipe, the outer side of the core body is attached to the inner side of the flaring pipe, and the first flange is located outside the flaring pipe and abuts against the end of the flaring end of the flaring pipe; the outer sleeve comprises a sleeve arranged outside the flaring pipe in a sleeving mode and a second flange connected to the end of the sleeve, the sleeve is arranged at the flaring end of the flaring pipe in a sleeving mode, the inner side of the sleeve is attached to the outer side of the flaring pipe, and the second flange abuts against one side of the first flange; the first flanges of the inner cores of the two pipelines are oppositely arranged, and the first flanges and the second flanges of the two pipelines are connected through connecting pieces.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline joints, in particular to a pipeline joint. Background Art

[0002] In the existing technology, there are various connection methods for PE water supply pressure pipes, such as socket connection, metal fastener connection, flange connection, capacitor connection, etc. However, these traditional pipe connection methods have some limitations, which are mainly reflected in the following aspects:

[0003] 1. Insufficient pressure resistance. Pipe connectors are often unable to withstand high pressure in high water pressure environments, and are prone to deformation or rupture of connection parts, resulting in reduced safety of the pipeline system.

[0004] 2. The sealing performance is poor. Some connection methods may not be sealed tightly during long-term use, which may easily cause water leakage and affect the stability and reliability of the water supply system.

[0005] 3. The connection stability is poor. Some connection methods may cause the connector to loosen due to changes in the external environment (such as temperature, vibration) or internal water pressure shock, increasing maintenance costs and safety hazards.

[0006] 4. The construction is cumbersome. The operation steps of the traditional connection method are relatively cumbersome, the construction is difficult, the installation efficiency is low, the construction period is extended, and the manpower and material costs are increased.

[0007] In summary, the existing PE water supply pressure pipe connection method has obvious deficiencies in pressure resistance, sealing, stability and construction convenience. It has problems such as insufficient pressure resistance, poor sealing performance, poor connection stability and cumbersome construction. Utility Model Content

[0008] The utility model aims to provide a pipe joint to solve the problems of insufficient pressure resistance, poor sealing performance, poor connection stability and complicated construction in existing pipe joints.

[0009] The utility model is realized by adopting the following technical solutions:

[0010] The utility model provides a pipe joint, comprising a first pipe and a second pipe, wherein the first pipe and the second pipe both comprise a flared pipe, an inner core and an outer sleeve;

[0011] One end of the flared tube is a flared end, and the inner core includes a core body installed in the flared tube and a first flange connected to the end of the core body. The core body is installed in the flared end of the flared tube, and the outer side of the core body is in contact with the inner side of the flared tube. The first flange is located outside the flared tube and abuts against the end of the flared end of the flared tube.

[0012] The outer sleeve includes a sleeve sleeved outside the flared pipe and a second flange connected to the end of the sleeve. The sleeve is sleeved on the flared end of the flared pipe, the inner side of the sleeve is in contact with the outer side of the flared pipe, and the second flange is in contact with one side of the first flange.

[0013] The first flanges of the inner cores of the pipe 1 and the pipe 2 are arranged opposite to each other, and the first flanges and the second flanges of the pipe 1 and the pipe 2 are connected via a connecting piece.

[0014] The utility model performs expansion processing on the pipe and installs the inner core and the outer sleeve on the expanded end of the expanded pipe, thereby strengthening the end structure of the pipe and improving the structural strength of the pipe end, so that the pipe joint can withstand higher pressure and solve the problem of insufficient pressure resistance of existing pipe joints; the utility model installs the inner core and the outer sleeve on the expanded end of the expanded pipe, because the outer side of the core fits with the inner side of the expanded pipe, and the inner side of the sleeve fits with the outer side of the expanded pipe, ensuring that the outer sleeve and the expanded pipe are in good contact and that the expansion pipe is in good contact. The outer tube and the inner core fit tightly together, with good sealing effect, and the pipe joint is not easy to leak; since one end of the flared tube is a flared end, and the inner side of the sleeve fits together with the outer side of the flared tube, the shape of the inner side of the sleeve is adapted to the shape of the outer side of the flared tube, and the outer sleeve is arranged on the outside of the flared tube and is not easy to fall off from the flared tube. The first flange and the second flange of the two pipes are connected by a connecting piece. With the above structure, not only is the connection stability good, but the connection method is simple and easy to operate, which is conducive to improving the connection efficiency of the joint.

[0015] As the preferred technical solution:

[0016] The connecting member may be, but is not limited to, a bolt.

[0017] As the preferred technical solution:

[0018] Interference fit is adopted between the outer sleeve and the flared tube, and between the flared tube and the inner core.

[0019] The interference fit ensures the connection strength and sealing effect between the outer sleeve and the flared pipe, and between the flared pipe and the inner core, further improving the connection stability and sealing performance of the pipe joints. During actual manufacturing, the end of the PE water supply pipe is heated and then flared to obtain the flared pipe. The inner core and outer sleeve are then installed on the flared end of the flared pipe. A hydraulic press is used to perform radial pressing to form an interference fit between the outer sleeve and the flared pipe, and between the flared pipe and the inner core. This can reduce the stress concentration caused by cold pressing and the risk of the pressed section being easily broken after aging of the pipe, allowing the pipe to withstand higher pressures.

[0020] As the preferred technical solution:

[0021] The expanded tube comprises a first straight section, an expanded section and a second straight section, wherein the diameter of the second straight section is greater than the diameter of the first straight section.

[0022] As the preferred technical solution:

[0023] The shape of the outer side of the core body is adapted to the shape of the inner side of the flared tube, and the shape of the inner side of the sleeve is adapted to the shape of the outer side of the flared tube;

[0024] The outer side of the core also includes a first straight section, a flared section, and a second straight section, and the inner diameter of the core is equal everywhere;

[0025] The inner side of the sleeve also includes a first straight section, a flared section and a second straight section, and the outer diameter of the sleeve is equal everywhere.

[0026] As the preferred technical solution:

[0027] Undercuts are formed on the outer surface of the core and the inner surface of the sleeve.

[0028] With the above structure, the undercut is in static friction contact with the flared pipe, and the undercut provides a more stable grip, which can effectively prevent the inner core and the outer sleeve from falling off the flared pipe, and can increase the sealing performance between the inner core and the flared pipe, and between the outer sleeve and the flared pipe, to prevent water leakage.

[0029] As the preferred technical solution:

[0030] The undercuts are arranged on the first straight section, the flared section and the second straight section on the outer side of the core and the inner side of the sleeve.

[0031] The above structure is adopted to form a triple anti-falling structure, which further increases the connection strength between the outer sleeve and the expanded pipe, and between the expanded pipe and the inner core, preventing the outer sleeve and the inner core from falling off; at the same time, this structure is also conducive to providing sealing performance between the inner core and the expanded pipe, and between the outer sleeve and the expanded pipe, to prevent water leakage.

[0032] As the preferred technical solution:

[0033] A first gasket is sleeved on the core body, the first gasket abuts between the flared end of the flared pipe and the first flange, and the second flange abuts one side of the first gasket, and the first gasket is located between the first flange and the second flange.

[0034] The first gasket is used to seal the first flange, the flared end of the flared pipe, and the second flange, thereby improving the sealing performance of the pipe joint and preventing water leakage.

[0035] As the preferred technical solution:

[0036] A second gasket is provided between the first flange of the inner core of the first pipe and the second pipe.

[0037] The second gasket is used to seal between two pipes, which can improve the sealing performance of the pipe joint and prevent water leakage.

[0038] As the preferred technical solution:

[0039] The inner core is an integrally formed structural component, and the outer shell is also an integrally formed structural component.

[0040] The core body and the first flange of the inner core are formed into the inner core by an integral molding method, and the sleeve and the second flange of the outer shell are formed into the outer shell by an integral molding method.

[0041] As the preferred technical solution:

[0042] The first flange and the second flange are flange end surfaces, and a plurality of bolt holes are formed on the flange end surfaces.

[0043] It is convenient to install the bolts to connect pipe one and pipe two.

[0044] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0045] 1. The utility model performs expansion processing on the pipe and installs an inner core and an outer sleeve on the expanded end of the expanded pipe, thereby strengthening the end structure of the pipe and improving the structural strength of the pipe end, so that the pipe joint can withstand higher pressure and solve the problem of insufficient pressure resistance of existing pipe joints; the utility model installs an inner core and an outer sleeve on the expanded end of the expanded pipe, because the shape of the outer side of the core body is adapted to the shape of the inner side of the expanded pipe, the shape of the inner side of the sleeve is adapted to the shape of the outer side of the expanded pipe, and the outer side of the core body is in contact with the inner side of the expanded pipe, The inner side of the sleeve fits with the outer side of the flared pipe, thereby ensuring a tight fit between the outer sleeve and the flared pipe, and between the flared pipe and the inner core, with a good sealing effect and the pipe joint not prone to leaking; since one end of the flared pipe is a flared end, and the shape of the inner side of the sleeve matches the shape of the outer side of the flared pipe, the outer sleeve is arranged on the outside of the flared pipe and is not easy to fall off the flared pipe. The first flange and the second flange of the two pipes are connected by a connecting piece. Combined with the above-mentioned structure, not only is the connection stability good, but the connection method is simple and easy to operate, which is conducive to improving the connection efficiency of the joint.

[0046] 2. The utility model adopts an interference fit between the outer sleeve and the flared pipe, and between the flared pipe and the inner core. The interference fit can ensure the connection strength and sealing effect between the outer sleeve and the flared pipe, and between the flared pipe and the inner core, which can further improve the connection stability and sealing performance of the pipe joint. During actual manufacturing, the end of the PE water supply pipe is heated and then flared to obtain the flared pipe. The inner core and the outer sleeve are then installed on the flared end of the flared pipe. The outer sleeve and the flared pipe are radially pressed by a hydraulic press to form an interference fit between the outer sleeve and the flared pipe, and between the flared pipe and the inner core. This can reduce the stress concentration phenomenon caused by cold material pressing, reduce the risk of the pressed section being easily broken after aging of the pipe, and enable the pipe to withstand higher pressure.

[0047] 3. The utility model has undercuts formed on the outer surface of the core and the inner surface of the outer sleeve. The undercuts provide a more stable grip and can effectively prevent the inner core and the outer sleeve from falling off from the flared pipe. The undercuts are arranged on the first straight section, the flared section and the second straight section on the outer side of the core and the inner side of the sleeve, forming a triple anti-falling structure, which further increases the connection strength between the outer sleeve and the flared pipe, and between the flared pipe and the inner core, and avoids the outer sleeve and the inner core from falling off. At the same time, this structure is also conducive to providing sealing performance between the inner core and the flared pipe, and between the outer sleeve and the flared pipe to prevent water leakage.

[0048] 4. The utility model provides a first gasket between the inner core and the expanded pipe and the outer sleeve to seal the first flange and the expanded end of the expanded pipe and the second flange, thereby improving the sealing performance of the pipe joint and preventing water leakage.

[0049] 5. The utility model sets a second gasket between the first flanges of the inner core of pipe one and pipe two to seal the two pipes, which can improve the sealing performance of the pipe joint and prevent water leakage. It forms a double anti-leakage design with the first gasket, further improving the sealing performance of the pipe joint and effectively preventing water leakage of the joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a structural schematic diagram of the pipe joint described in the utility model.

[0051] Figure 2 This is a structural schematic diagram of the expanded pipe described in the utility model.

[0052] Figure 3 It is a structural schematic diagram of the inner core described in the utility model.

[0053] Figure 4 for Figure 3 Enlarged schematic diagram of point A in the middle.

[0054] Figure 5 for Figure 3 Enlarged schematic diagram of point B in the middle.

[0055] Figure 6 for Figure 3 Enlarged schematic diagram of point C in the middle.

[0056] Figure 7 This is a schematic structural diagram of the jacket of the present invention.

[0057] Figure 8 for Figure 7 Enlarged schematic diagram of point D in the middle.

[0058] Figure 9 for Figure 7 Enlarged schematic diagram of point E in the middle.

[0059] Figure 10 for Figure 7 Enlarged schematic diagram of point F in the middle.

[0060] Figure 11 This is a structural schematic diagram of the first gasket described in the present utility model.

[0061] Figure 12 This is a structural schematic diagram of the second gasket described in the present utility model.

[0062] Icon: 1- flared pipe, 2- inner core, 201- core body, 202- first flange, 3- outer sleeve, 301- sleeve, 302- second flange, 4- first gasket, 5- second gasket, 601- first straight section, 602- flared section, 603- second straight section. DETAILED DESCRIPTION

[0063] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0064] Example 1

[0065] like Figures 1-12 As shown, this embodiment provides a pipe joint, including a pipe 1 and a pipe 2, wherein the pipe 1 and the pipe 2 both include a flared pipe 1, an inner core 2 and an outer sleeve 3.

[0066] One end of the flared pipe 1 is a flared end, the diameter of which is larger than the diameter of the middle section of the flared pipe 1. Specifically, the flared pipe 1 includes a first straight section 601, a flared section 602, and a second straight section 603. The diameter of the second straight section 603 is larger than the diameter of the first straight section 601. In this embodiment, the flared pipe 1 is a PE water supply pipe, which is obtained by flaring its ends.

[0067] The inner core 2 includes a core body 201 installed within the flared tube 1 and a first flange 202 connected to the end of the core body 201. The core body 201 is installed at the flared end of the flared tube 1. The shape of the outer side of the core body 201 matches the shape of the inner side of the flared tube 1. The outer side of the core body 201 also includes a first straight section 601, a flared section 602, and a second straight section 603. The inner diameter of the core body 201 is equal throughout. The first flange 202 is located outside the flared tube 1 and abuts against the flared end of the flared tube 1.

[0068] The outer sleeve 3 includes a sleeve 301 that fits over the flared tube 1 and a second flange 302 connected to the end of the sleeve 301. The sleeve 301 fits over the flared end of the flared tube 1. The shape of the inner side of the sleeve 301 matches the shape of the outer side of the flared tube 1. The inner side of the sleeve 301 also includes a first straight section 601, a flared section 602, and a second straight section 603. The outer diameter of the sleeve 301 is uniform throughout. The second flange 302 abuts against one side of the first flange 202.

[0069] In this embodiment, the core body 201 and the first flange 202 of the inner core 2 are formed into the inner core 2 by integral molding, and the sleeve 301 and the second flange 302 of the outer sleeve 3 are formed into the outer sleeve 3 by integral molding.

[0070] The core body 201 is sleeved with a first gasket 4, which is in contact between the flared end of the flared tube 1 and the first flange 202, and the second flange 302 is in contact with one side of the first gasket 4. At the same time, the first gasket 4 is located between the first flange 202 and the second flange 302. The first gasket 4 is used to seal the first flange 202 and the flared end of the flared tube 1 and the second flange 302.

[0071] The outer surface of the core body 201 and the inner surface of the sleeve 301 are formed with undercuts, which are shaped like barbs. The undercuts provide a more stable grip, which can effectively prevent the inner core 2 and the outer sleeve 3 from falling off the flared pipe 1, and can increase the sealing performance between the inner core 2 and the flared pipe 1, and between the outer sleeve 3 and the flared pipe 1, to prevent water leakage.

[0072] The undercuts are provided on the first straight section 601 , the flared section 602 and the second straight section 603 on the outside of the core 201 and the inside of the sleeve 301 .

[0073] In this embodiment, interference fit is adopted between the outer sleeve 3 and the flared tube 1 , and between the flared tube 1 and the inner core 2 .

[0074] The first flange 202 of the inner core 2 of the first pipe is arranged opposite to the first flange 202 of the inner core 2 of the second pipe, and a second gasket 5 is installed between the two. The two pipes are connected together by bolts passing through the first flange 202 and the second flange 302 of the two pipes. The second gasket 5 is used to seal the two pipes.

[0075] The first flange 202 and the second flange 302 are flange end surfaces, and a plurality of bolt holes are provided on the flange end surfaces to facilitate installation of the bolts.

[0076] The production process of the above-mentioned pipe joint is:

[0077] S1: The end of the PE water supply pipe is heated to soften it, and the softened end of the pipe is expanded to form an expanded pipe 1;

[0078] S2: Slide the first gasket 4 onto the core body 201 of the inner core 2, and make the first gasket 4 abut against one side of the first flange 202;

[0079] S3: Push the core body 201 of the inner core 2 into the inside of the expanded tube 1 by a hydraulic press until the end of the expanded tube 1 is tightly against the first gasket 4;

[0080] S4: The outer sleeve 3 is pushed onto the outside of the expanded pipe 1 by a hydraulic press until the second flange 302 of the outer sleeve 3 is in contact with the first gasket 4;

[0081] S5: Using a hydraulic press, the outer sleeve 3 is compressed radially along the expanded tube 1. The radial contraction distance is 10%-30% of the outer diameter of the first straight section 601 of the expanded tube 1. An interference fit is formed between the outer sleeve 3 and the expanded tube 1, and between the expanded tube 1 and the inner core 2. The flange end faces of the inner core 2 and the outer sleeve 3 are not deformed. In this way, a pipe 1 is obtained.

[0082] S6: Make pipe 2 in the same way, align the flange end faces of the two pipe cores 2, install a second gasket 5 between them, and then connect the two pipes together by passing bolts through the flange end faces of the two pipe cores 2 and the outer sleeve 3.

[0083] The utility model heats the end of a PE water supply pipe and then expands it to obtain an expanded pipe 1, then installs an inner core 2 and an outer sleeve 3 on the expanded end of the expanded pipe 1, and performs radial pressing by a hydraulic press to form an interference fit between the outer sleeve 3 and the expanded pipe 1, and between the expanded pipe 1 and the inner core 2, thereby reducing the stress concentration phenomenon of cold material pressing, reducing the risk of the pressed section being easily broken after aging of the pipe, and allowing the pipe to withstand higher pressure.

[0084] The utility model performs expansion processing on the pipe and installs the inner core 2 and the outer sleeve 3 at the expanded end of the expanded pipe 1, thereby strengthening the end structure of the pipe, improving the structural strength of the pipe end, and enabling the pipe to withstand higher pressure.

[0085] The utility model is provided with undercuts on the first straight section 601, the flared section 602 and the second straight section 603 on the outside of the inner core 2 and the inside of the outer sleeve 3, forming a triple anti-falling structure, which further increases the connection strength between the outer sleeve 3 and the flared pipe 1, and between the flared pipe 1 and the inner core 2, and avoids the outer sleeve 3 and the inner core 2 from falling off; at the same time, this structure is also conducive to providing sealing performance between the inner core 2 and the flared pipe 1, and between the outer sleeve 3 and the flared pipe 1, to prevent water leakage.

[0086] The utility model is provided with a first gasket 4 and a second gasket 5, and has a double anti-leakage design, thereby improving the sealing performance of the pipe joint and effectively preventing the joint from leaking.

[0087] The utility model adds a flaring slope design (2°-5°), which solves the problem that a good interference fit cannot be formed between the first straight section 601 and the second straight section 603 due to uneven inner diameter of the pipe.

[0088] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A pipe joint, characterized in that: The invention comprises a first pipe and a second pipe, wherein the first pipe and the second pipe each comprise a flared pipe, an inner core and an outer sleeve; One end of the flared tube is a flared end, and the inner core includes a core body installed in the flared tube and a first flange connected to the end of the core body. The core body is installed in the flared end of the flared tube, and the outer side of the core body is in contact with the inner side of the flared tube. The first flange is located outside the flared tube and abuts against the end of the flared end of the flared tube. The outer sleeve includes a sleeve sleeved outside the flared pipe and a second flange connected to the end of the sleeve. The sleeve is sleeved on the flared end of the flared pipe, the inner side of the sleeve is in contact with the outer side of the flared pipe, and the second flange is in contact with one side of the first flange. The first flanges of the inner cores of the pipe 1 and the pipe 2 are arranged opposite to each other, and the first flanges and the second flanges of the pipe 1 and the pipe 2 are connected via a connecting piece.

2. The pipe joint according to claim 1, characterized in that: Interference fit is adopted between the outer sleeve and the flared tube, and between the flared tube and the inner core.

3. The pipe joint according to claim 1, characterized in that: The expanded tube comprises a first straight section, an expanded section and a second straight section, wherein the diameter of the second straight section is greater than the diameter of the first straight section.

4. The pipe joint according to claim 3, characterized in that: The shape of the outer side of the core body is adapted to the shape of the inner side of the flared tube, and the shape of the inner side of the sleeve is adapted to the shape of the outer side of the flared tube; The outer side of the core also includes a first straight section, a flared section, and a second straight section, and the inner diameter of the core is equal everywhere; The inner side of the sleeve also includes a first straight section, a flared section and a second straight section, and the outer diameter of the sleeve is equal everywhere.

5. The pipe joint according to claim 4, characterized in that: Undercuts are formed on the outer surface of the core and the inner surface of the sleeve.

6. The pipe joint according to claim 5, characterized in that: The undercuts are arranged on the first straight section, the flared section and the second straight section on the outer side of the core and the inner side of the sleeve.

7. The pipe joint according to claim 1, characterized in that: A first gasket is sleeved on the core body, the first gasket abuts between the flared end of the flared pipe and the first flange, and the second flange abuts one side of the first gasket, and the first gasket is located between the first flange and the second flange.

8. The pipe joint according to claim 1, characterized in that: A second gasket is provided between the first flange of the inner core of the first pipe and the second pipe.

9. The pipe joint according to claim 1, characterized in that: The inner core is an integrally formed structural component, and the outer shell is also an integrally formed structural component.

10. The pipe joint according to claim 1, characterized in that: The first flange and the second flange are flange end surfaces, and a plurality of bolt holes are formed on the flange end surfaces.

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