Fastening type sliding tightening type aluminum-plastic composite pipe fitting

Abstract

The utility model relates to the technical field of pipeline connection, and discloses a fastening type sliding tightening type aluminum-plastic composite pipe fitting which comprises a threaded connecting rod and a pipe fitting body, sealing sleeves are symmetrically arranged on the two end faces of the threaded connecting rod, elastic sealing rings are arranged at the bottoms of inner cavities of the sealing sleeves, limiting plates are arranged on the end faces of the sealing sleeves, and the limiting plates are connected with the threaded connecting rod. A limiting plate is arranged at the connecting end of the pipe fitting body, a limiting pin is arranged on the limiting plate, a threaded connecting port is formed in the connecting end of the pipe fitting body, a sealing chamfer is arranged at the tail end of the threaded connecting port, a limiting ring is arranged at the tail end of the sealing chamfer, and a limiting hole is formed in the limiting ring. According to the composite pipe fitting, the elastic sealing piece and the threaded connecting rod are arranged and matched with the threaded sealing sleeve and the threaded connecting port, so that rapid and safe connection can be achieved when the composite pipe fitting is connected, and potential safety hazards caused by the leakage risk due to aging after the pipe fitting is connected can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connection, in particular to a fastening sliding aluminum-plastic composite pipe fitting. Background Art

[0002] There are three types of aluminum-plastic composite pipes on the market: the first type has polyethylene inner and outer layers, the second type has cross-linked polyethylene inner layer and polyethylene outer layer, and the third type has cross-linked polyethylene inner and outer layers and aluminum layers in the middle. This type of pipe, because it contains an aluminum layer, can increase the internal pressure resistance, block oxygen, CO2, etc. to avoid the threat of corrosion to water pipeline equipment, has good thermal conductivity to reduce hot spot concentration, anti-static and good shielding properties and a certain flame retardant effect, so it is easily accepted by the public. And because its connecting pipe fittings are made of copper, Meifeng plastic alloy pipe fittings, and stainless steel threaded sealing pipe fittings, the connection is more convenient and does not require special tools. It is close to the interface of a large number of cast iron pipes, thus showing certain advantages. The plastic part of the second and third types uses cross-linked polyethylene (PEX), which has a more stable molecular structure and is stronger than the first type, and is more suitable for building water supply and heating systems.

[0003] In the prior art, due to the double-layer structure adopted by the aluminum-plastic composite pipe, during the installation and connection process of the pipe fittings, it is often necessary to weld the aluminum-plastic pipe with the new pipe fittings, and a compression fitting needs to be used. This makes the connection part prone to aging over time, resulting in the connection being not tight enough, and there is a risk of leakage, which is prone to water leakage. At the same time, due to aging, the reconnection and repair requires re-cutting of the pipe fittings, and adding new pipe fittings for connection, which increases the number of connection ports. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a fastening sliding aluminum-plastic composite pipe fitting, which has the functions of quick connection and installation, quick disassembly and assembly, and high sealing, and solves the problems of composite pipe fitting connectors being prone to aging, leakage, and inconvenient installation and connection.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purposes of quick connection and installation, quick disassembly and assembly, and high sealing, the utility model provides the following technical solutions: a fastening sliding aluminum-plastic composite pipe fitting, comprising a threaded connecting rod, a pipe fitting body, the inner ring of the threaded connecting rod is provided with a thread, and sealing sleeves are symmetrically provided at both end surfaces of the threaded connecting rod, an elastic sealing ring is provided at the bottom of the inner cavity of the sealing sleeve, a limiting plate is provided on the end surface of the sealing sleeve, a limiting pin is provided on the limiting plate, a threaded connection port is provided at the connecting end of the threaded connection port, a sealing chamfer is provided at the end of the sealing chamfer, a limiting ring is provided at the end of the sealing chamfer, a limiting hole is provided on the limiting ring, the limiting hole and the limiting pin provided on the limiting plate are mutually clamped, and the inner ring of the threaded connecting rod is connected to the threaded connection port.

[0008] Preferably, one end of the limit pin and the limit hole that are mutually engaged is provided with a chamfer, the other end of the limit pin is provided with a pulling head, and a tightening spring is sleeved on the limit pin between the pulling head and the limit plate.

[0009] Preferably, the inner ring wall surface of the sealing sleeve is provided with an inwardly contracted conical wall surface having an inclination angle greater than the sealing chamfer.

[0010] Preferably, the number of thread turns provided on the inner ring of the threaded connecting rod is greater than the number of thread turns provided on the threaded connecting port.

[0011] Preferably, the number of the limiting pins is at least six, and the number of the limiting holes is at least four.

[0012] Preferably, the pipe body comprises a plastic outer tube and an aluminum inner tube, and the threaded connection port is arranged on the aluminum inner tube.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the utility model provides a fastening sliding aluminum-plastic composite pipe fitting, which has the following beneficial effects:

[0015] 1. The fastening type sliding aluminum-plastic composite pipe fitting, through the setting of elastic sealing parts and threaded connecting rods, cooperates with the screw sealing sleeve and the threaded connecting port, so that the composite pipe fitting can achieve fast and safe connection when connecting, can prevent the risk of leakage due to aging after the pipe fitting is connected, and can quickly replace or repair the connecting port pipe fittings that have been used for a long time.

[0016] 2. The tightening sliding aluminum-plastic composite pipe fittings, through the setting of the limit pins and the limit holes, ensure that the connection surfaces of the pipe fittings will not be separated from each other due to the loosening of the threads after the pipe fittings are connected, and the sealing of the connection ends can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an exploded schematic diagram of the connection port of the fastening sliding aluminum-plastic composite pipe fitting in the utility model;

[0018] Figure 2 This is a front view of the connection port of the fastening sliding aluminum-plastic composite pipe fitting in the utility model;

[0019] Figure 3 This is a cross-sectional view of the connection port of the fastening sliding aluminum-plastic composite pipe fitting in the utility model;

[0020] Figure 4 It is a three-dimensional structural schematic diagram of a threaded connecting rod of a fastening sliding aluminum-plastic composite pipe fitting in the utility model;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the fastening sliding aluminum-plastic composite pipe fitting in the utility model.

[0022] In the figure: 1-threaded connecting rod, 2-pipe fitting body, 3-sealing sleeve, 4-elastic sealing ring, 5-limiting plate, 6-limiting pin, 7-threaded connecting port, 8-limiting ring, 9-tightening spring, 210-aluminum inner tube, 202-plastic outer tube, 801-limiting hole. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-5 A fastening type sliding aluminum-plastic composite pipe fitting comprises a threaded connecting rod 1 and a pipe fitting body 2. The inner ring of the threaded connecting rod 1 is provided with threads. Sealing sleeves 3 are symmetrically provided at both end surfaces of the threaded connecting rod 1. An elastic sealing ring 4 is provided at the bottom of the inner cavity of the sealing sleeve 3. A limiting plate 5 is provided on the end surface of the sealing sleeve 3. A limiting pin 6 is provided on the limiting plate 5. A threaded connecting port 7 is provided at the connecting end of the pipe fitting body 2. A sealing chamfer is provided at the end of the threaded connecting port 7. A limiting ring 8 is provided at the end of the sealing chamfer. A limiting hole 801 is provided on the limiting ring 8. The limiting hole 801 is mutually engaged with the limiting pin 6 provided on the limiting plate 5. The inner ring of the threaded connecting rod 1 is connected to the threaded connecting port 7.

[0025] Determine the pipeline layout and connection method according to the engineering design drawings, and mark the construction area to determine the location and length of the pipeline. Use a cutting machine to cut the aluminum-plastic composite pipe into appropriate lengths, and ensure that the cuts are smooth and burr-free. Cut at the end of the pipe to be connected, and reserve an appropriate length of pipe when connecting to ensure a tight connection. Use a screwdriver and a wrench to tighten the two pipe connectors together to ensure a firm connection and avoid water leakage. During the installation process, it is necessary to pay attention to the characteristics of the slip-on connection, which does not require the use of glue, is easy to operate, and effectively improves the installation efficiency. After the installation is completed, a tightness check is required to ensure that the connection between the pipes is tight and not prone to leakage.

[0026] The sliding connection does not require the use of glue, is easy to operate, and effectively improves the installation efficiency; it has strong fastening properties, ensuring that the connection between pipe fittings is tight and not prone to leakage; the use of the elastic sealing ring 4 increases the sealing performance and effectively prevents leakage; the clamping design of the limit hole 801 and the limit pin 6 prevents excessive tightening or loosening between pipe fittings and ensures the normal use of the pipe fittings; the design of the sealing chamfer and the limit ring 8 can better prevent the pipe fittings from rupture due to stress concentration.

[0027] One end of the limit pin 6 that is mutually engaged with the limit hole 801 is provided with a chamfer, and the other end of the limit pin 6 is provided with a pulling head. A tightening spring 9 is sleeved on the limit pin 6 between the pulling head and the limit plate 5.

[0028] During the installation process of the above-mentioned fastening type sliding aluminum-plastic composite pipe fitting, the clamping design of the limit pin 6 and the limit hole 801 can be further optimized. Specifically, a chamfer can be set at the end where the limit pin 6 and the limit hole 801 are mutually clamped to increase the stability and reliability of the clamping. In addition, a pulling head can be set at the other end of the limit pin 6 to facilitate manual operation, and a tightening spring 9 can be set on the limit pin 6 between the pulling head and the limit plate 5 to provide a certain elastic buffer and reduce the risk of damage caused by stress concentration. These optimization measures can improve the connection effect and service life of the pipe fittings.

[0029] The inner wall surface of the sealing sleeve 3 is provided with an inwardly contracted conical wall surface with an inclination angle greater than the sealing chamfer.

[0030] The conical wall can form a better seal with the pipe body 2, because its inward contraction design can better adapt to the outer surface of the pipe body 2 and enhance the sealing effect. Since the inclination angle of the conical wall is greater than the inclination angle of the sealing chamfer, the pipe body 2 can be better guided into the sealing sleeve 3 during connection, making installation more convenient. Since the inner ring wall of the sealing sleeve 3 is provided with a conical wall, the stress concentration between the pipe body 2 and the sealing sleeve 3 can be reduced, thereby extending the service life of the pipe. The design of the conical wall can make the connection between the pipe body 2 and the sealing sleeve 3 more stable and less prone to loosening or leakage.

[0031] The number of thread turns arranged on the inner circle of the threaded connecting rod 1 is greater than the number of thread turns arranged on the threaded connecting port 7 .

[0032] Since the inner ring of the threaded connecting rod 1 has more threads, it can provide a stronger tightening force, making the connection between the pipes more secure. More threads can better prevent the loosening between the pipes and ensure the stability of the connection. More threads can provide a better sealing effect and effectively prevent leakage between the pipes. Although the inner ring of the threaded connecting rod 1 has more threads, the installation process is still relatively simple because it is designed as a sliding tightening type, and no adhesive or other auxiliary tools are required.

[0033] The number of the limit pins 6 is at least six, and the number of the limit holes 801 is at least four. Increasing the number of the limit pins 6 and the limit holes 801 can provide more constraint points and improve the connection stability between pipes. More limit pins 6 can better prevent the rotation between pipes, making them more stably fixed together. Due to the increase in the number of limit pins 6 and the limit holes 801, the connection of pipes can be completed faster, improving the installation efficiency. By increasing the number of limit pins 6 and the limit holes 801, the sealing performance between pipes can be further enhanced to prevent leakage.

[0034] The pipe fitting body 2 includes a plastic outer tube 202 and an aluminum inner tube 201, and the threaded connection port 7 is arranged on the aluminum inner tube 201. By arranging the threaded connection port 7 on the aluminum inner tube 201, the connection strength of the pipe fitting body 2 can be ensured. The plastic outer tube 202 can provide a certain flexibility and protection, making the pipe fitting more durable and reliable. Since the aluminum inner tube 201 has high hardness and stability, it can provide good sealing performance and effectively prevent leakage. The aluminum inner tube 201 is relatively light and convenient for transportation and installation. At the same time, the plastic outer tube 202 can also provide a certain protection to prevent the aluminum inner tube 201 from being damaged during transportation and use. The aluminum inner tube 201 has excellent corrosion resistance and can withstand the erosion of various chemical substances, ensuring the long-term use reliability of the pipe fitting body 2.

[0035] Working principle: On the connecting end of the pipe body 2, a threaded connection port 7 is set on the aluminum inner ring, and the threads set on the inner ring of the threaded connecting rod 1 are engaged with each other to achieve the initial connection of the main pipe fitting. At this time, the pipe body 2 and the threaded connecting rod 1 are continued to be turned, so that the elastic sealing ring 4 located in the sealing sleeve 3 is squeezed between the bottom of the inner ring of the sealing sleeve 3 and the chamfered wall. Since the aperture of the chamfered bottom is larger than the elastic sealing ring 4, the force of the threaded knob and the distance of the knob can be controlled to achieve the tightness of the sealing ring on the chamfered wall, thereby achieving the adjustment of the sealing performance to cope with different usage scenarios. At the same time, after the adjustment, the limit pin 6 is inserted into the limit hole 801 closest to it to prevent the mutually engaged threads from loosening.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fastening type sliding aluminum-plastic composite pipe fitting, comprising a threaded connecting rod (1) and a pipe fitting body (2), wherein the inner ring of the threaded connecting rod (1) is provided with threads, and is characterized in that: The threaded connecting rod (1) is symmetrically provided with sealing sleeves (3) at both ends, an elastic sealing ring (4) is provided at the bottom of the inner cavity of the sealing sleeve (3), a limiting plate (5) is provided at the end surface of the sealing sleeve (3), a limiting pin (6) is provided on the limiting plate (5), a threaded connecting port (7) is provided at the connecting end of the pipe body (2), a sealing chamfer is provided at the end of the threaded connecting port (7), a limiting ring (8) is provided at the end of the sealing chamfer, a limiting hole (801) is provided on the limiting ring (8), the limiting hole (801) and the limiting pin (6) provided on the limiting plate (5) are mutually engaged, and the inner ring of the threaded connecting rod (1) and the threaded connecting port (7) are mutually connected.

2. The fastening type sliding aluminum-plastic composite pipe fitting according to claim 1 is characterized in that: One end of the limit pin (6) and the limit hole (801) that are mutually engaged is provided with a chamfer, and the other end of the limit pin (6) is provided with a pulling head. A tightening spring (9) is sleeved on the limit pin (6) between the pulling head and the limit plate (5).

3. The fastening type sliding aluminum-plastic composite pipe fitting according to claim 1 is characterized in that: The inner ring wall surface of the sealing sleeve (3) is provided with an inwardly contracted conical wall surface having an inclination angle greater than the sealing chamfer.

4. The fastening type sliding aluminum-plastic composite pipe fitting according to claim 1 is characterized in that: The number of thread turns arranged on the inner circle of the threaded connecting rod is greater than the number of thread turns arranged on the threaded connecting port (7).

5. The fastening type sliding aluminum-plastic composite pipe fitting according to claim 1 is characterized in that: The number of the limiting pins (6) is at least six, and the number of the limiting holes (801) is at least four.

6. The fastening type sliding aluminum-plastic composite pipe fitting according to claim 1 is characterized in that: The pipe body (2) comprises a plastic outer tube (202) and an aluminum inner tube (201).

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