Threaded connection loose joint pipe fitting

Abstract

The utility model provides a loose joint pipe fitting in threaded connection, and relates to the technical field of pipeline connection. Comprising a connecting pipe and a lock nut, the connecting pipe sequentially comprises a threaded section, a first positioning section and a limiting section in the axial direction. The lock nut sequentially comprises a second positioning section and a mounting section in the axial direction. Tooth-shaped positioning pieces are arranged on the first positioning section and the second positioning section, and the lock nut and the connecting pipe are matched and fixed through the tooth-shaped positioning pieces. A limiting boss protruding along the inner surface of the lock nut is arranged between the second positioning section and the mounting section, and the limiting section is matched with the limiting boss in a limiting mode. The threaded section is arranged, so that the connecting pipe can be directly connected with an external pipeline through threads, the first positioning section and the second positioning section are matched, the positions of the lock nut and the connecting pipe are relatively fixed, and at the moment, the lock nut is directly screwed on the valve through a wrench; the limiting boss can prevent the connecting pipe from slipping from the lock nut. The structure can reduce assembling steps, improve assembling efficiency and reduce material waste.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe connection, and particularly to a flexible pipe fitting with threaded connection. Background Art

[0002] Flexible pipe fittings are often used in the water supply field, such as the connection between pipes and valves. Existing flexible pipe fittings usually require tools such as wrenches or hexagon socket wrenches to separately screw and install each structure of the flexible pipe fitting. Since the diameters of different structures of the flexible pipe fitting are different, during the screwing and installation process, it is necessary to correspondingly select a wrench or hexagon socket wrench with a suitable diameter. Therefore, the installation steps of the flexible pipe fitting are cumbersome and the installation efficiency is low.

[0003] In addition, in order to facilitate the screwing of each structure by a wrench or hexagon socket wrench, a mounting position for the wrench or hexagon socket wrench with a certain length needs to be set for each structure, which results in an increase in the material consumption and space occupancy rate of the flexible pipe fitting.

[0004] In view of this, the present utility model is specifically proposed. Content of the Utility Model

[0005] The purpose of the present utility model is to provide a flexible pipe fitting with threaded connection, which can reduce the assembly steps, improve the assembly efficiency, and reduce material waste.

[0006] The embodiments of the present utility model are implemented as follows:

[0007] In a first aspect, the present utility model provides a flexible pipe fitting with threaded connection, including a pipe and a lock nut, and the lock nut is sleeved on the surface of the pipe;

[0008] The pipe sequentially includes a threaded section, a first positioning section, and a limiting section along the axial direction, and the lock nut sequentially includes a second positioning section and a mounting section along the axial direction;

[0009] The threaded section is provided with threads;

[0010] Tooth-shaped positioning members are provided on both the first positioning section and the second positioning section, and the lock nut and the pipe are fixedly matched through the tooth-shaped positioning members;

[0011] A limiting boss protruding along the inner surface of the lock nut is provided between the second positioning section and the mounting section, and the limiting section is in limiting cooperation with the limiting boss.

[0012] In an optional embodiment, a sealing section is further provided between the threaded section and the first positioning section, and a sealing member is sleeved on the surface of the sealing section.

[0013] In an optional embodiment, the tooth-shaped positioning member of the first positioning section is an external spline tooth, and the tooth-shaped positioning member of the second positioning section is an internal spline tooth.

[0014] In an alternative embodiment, the cross-section of the outer surface of the installation section is polygonal.

[0015] In an alternative embodiment, the angle of each tooth of the toothed positioning member is 60 to 120°.

[0016] In an alternative embodiment, the number of teeth of the toothed positioning member is 60 to 120 teeth.

[0017] In an alternative embodiment, the limiting section is provided with a flange.

[0018] In an alternative embodiment, the threaded section is an external thread.

[0019] The beneficial effects of the embodiments of the present utility model are:

[0020] The present utility model provides a flexible pipe fitting with a threaded connection. By providing a threaded section, the connecting pipe can be directly connected to an external pipe through the thread. The lock nut and the connecting pipe are positioned by the toothed positioning members on the first positioning section and the second positioning section, so that the lock nut and the connecting pipe are relatively fixed. At this time, the lock nut can be directly screwed onto the valve by a wrench. The limiting boss can be used to limit the connecting pipe to prevent the connecting pipe from slipping out of the lock nut. This structure can reduce the assembly steps, improve the assembly efficiency, and reduce material waste. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 A cross-sectional view of the flexible pipe fitting with a threaded connection provided by the embodiment of the present utility model;

[0023] Figure 2 A front view of the connecting pipe provided by the embodiment of the present utility model;

[0024] Figure 3 A top view of the connecting pipe provided by the embodiment of the present utility model;

[0025] Figure 4 A cross-sectional view of the lock nut provided by the embodiment of the present utility model;

[0026] Figure 5 A top view of the lock nut provided by the embodiment of the present utility model;

[0027] Figure 6 A cross-sectional view of the installation process of the flexible pipe fitting with a threaded connection provided by the embodiment of the present utility model;

[0028] Figure 7 is Figure 6 A sectional view taken along the B-B section in the middle.

[0029] Icons: 100 - flexible pipe fitting; 110 - connecting pipe; 111 - threaded section; 112 - sealing section; 113 - first positioning section; 1131 - external splines; 114 - limiting section; 1141 - flange; 120 - lock nut; 121 - second positioning section; 1211 - internal splines; 122 - installation section; 130 - seal. Detailed implementation manners

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0033] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present utility model is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0034] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0035] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "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, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0036] Please refer to Figure 1 , this embodiment provides a threaded connection live pipe fitting 100, which includes a pipe 110 and a lock nut 120, and the lock nut 120 is sleeved on the surface of the pipe 110.

[0037] In this embodiment, the pipe 110 is used to connect with the water distributor of the manifold, and the lock nut 120 is used to connect with the valve.

[0038] Please refer to Figure 2 and Figure 3 , in this embodiment, the pipe 110 sequentially includes a threaded section 111, a sealing section 112, a first positioning section 113, and a limiting section 114 along the axial direction.

[0039] Among them, the threaded section 111 is provided with an external thread for connecting with the water distributor of the manifold.

[0040] A sealing member 130 is sleeved on the surface of the sealing section 112 to prevent water leakage.

[0041] A toothed positioning member is provided on the first positioning section 113. The toothed positioning member is specifically an external spline 1131. The angle of each tooth of the external spline 1131 is 90°, the number of teeth is 90, and the 90 teeth are evenly distributed on the first positioning section 113.

[0042] The limiting section 114 is a flange 1141 for contacting and limiting with the lock nut 120, and the outer diameter of the flange 1141 is the maximum outer diameter of the pipe 110.

[0043] Please refer to Figure 4 and Figure 5 , in this embodiment, the lock nut 120 sequentially includes a second positioning section 121 and an installation section 122 along the axial direction.

[0044] Among them, a toothed positioning member is provided on the second positioning section 121. The toothed positioning member is specifically an internal spline 1211. The angle of each tooth of the internal spline 1211 is 90°, the number of teeth is 90, and the 90 teeth are evenly distributed on the second positioning section 121.

[0045] When the lock nut 120 is sleeved on the surface of the adapter pipe 110, the internal spline 1211 of the lock nut 120 cooperates with the external spline 1131 of the adapter pipe 110 to be fixed, so that relative rotation between the lock nut 120 and the adapter pipe 110 cannot occur. Therefore, when the lock nut 120 is screwed, the adapter pipe 110 can be installed in place together, avoiding the separate installation of each component of the quick-connect fitting 100 and improving the installation efficiency. In addition, since the installation of the entire quick-connect fitting 100 can be achieved by simply installing the lock nut 120, the number of installation sections 122 that are convenient for tool installation and screwing can be reduced, saving the material usage and installation space of the quick-connect fitting 100.

[0046] In this embodiment, in order to facilitate the installation and screwing of the installation section 122, the cross-section of the outer surface of the installation section 122 is octagonal, and the connection between the installation section 122 and the valve can be directly achieved with a wrench.

[0047] In other embodiments, the outer surface of the installation section 122 can also be hexagonal, decagonal, dodecagonal, etc., as long as it is convenient to use tools for installation.

[0048] In this embodiment, a limiting boss protruding along the inner surface of the lock nut 120 is provided between the second positioning section 121 and the installation section 122. The limiting section 114 is in limiting cooperation with the limiting boss, so that the flange 1141 of the adapter pipe 110 is in limiting contact with the lock nut 120.

[0049] Therefore, it can be understood that the minimum inner diameter of the lock nut 120 is greater than the outer diameter of each section of the adapter pipe 110 except the limiting section 114, so as to ensure that the lock nut 120 can be smoothly sleeved on the outer surface of the adapter pipe 110.

[0050] And it should be additionally noted that after the sealing member 130 is sleeved on the surface of the sealing section 112, the overall outer diameter is also smaller than the minimum inner diameter of the lock nut 120, so as to ensure that the lock nut 120 can be smoothly sleeved on the outer surface of the adapter pipe 110.

[0051] In addition, it can be understood that to ensure the mating connection between the internal spline 1211 and the external spline 1131, it is necessary to ensure that the size of the internal spline 1211 is greater than the corresponding size of the external spline 1131 everywhere.

[0052] Please refer to Figure 7, in addition, since both the internal splines 1211 and the external splines 1131 in this embodiment have 90 teeth and the angle of each tooth is 90°, the lock nut 120 can be aligned with the external splines 1131 of the connecting pipe 110 with a minimum adjustment of 4°, and then assembled onto the surface of the connecting pipe 110, making the installation more efficient.

[0053] In other embodiments, the number of teeth of the internal splines 1211 and the external splines 1131 can also be any one of 60 teeth, 70 teeth, 80 teeth, 90 teeth, 100 teeth, 110 teeth or 120 teeth, etc., and the angle of each tooth can also be any one of 60°, 70°, 80°, 90°, 100°, 110° or 120°, which can be specifically set according to actual needs.

[0054] A threaded connecting flexible pipe fitting 100 provided in this embodiment has the following working principle:

[0055] Please refer to Figure 1 and Figure 6 , put the seal 130 on the sealing section 112 of the connecting pipe 110, and then insert the connecting pipe 110 into the lock nut 120 from one end of the threaded section 111 along the direction from the installation section 122 to the second positioning section 121 of the lock nut 120. Threadedly connect the threaded section 111 of the connecting pipe 110 with the water distributor, and then move the lock nut 120 until the internal splines 1211 of the lock nut 120 cooperate and fix with the external splines 1131 of the connecting pipe 110, and the flange 1141 of the connecting pipe 110 contacts and is limited by the limiting boss of the lock nut 120. At this time, the lock nut 120, the connecting pipe 110 and the water distributor are integrated and cannot move relative to each other without external force. Then use a wrench to screw the installation section 122 of the lock nut 120 to connect the lock nut 120 with the valve. Therefore, the flexible pipe fitting 100 provided in this embodiment can quickly connect the water distributor and the valve, and the installation process is efficient.

[0056] Due to the cooperative positioning of the internal splines 1211 and the external splines 1131 and the cooperative limiting of the flange 1141 and the limiting boss, it can effectively prevent the nut from skewing during the installation process, and there is enough space for the adjustable wrench to perform the tightening operation on the external octagon of the lock nut 120, making the installation operation more labor-saving.

[0057] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A threaded connection flexible pipe fitting, characterized in that, It includes a nipple and a locknut, and the locknut is sleeved on the surface of the nipple; The nipple sequentially includes a threaded section, a first positioning section and a limiting section along the axial direction, and the locknut sequentially includes a second positioning section and an installation section along the axial direction; The threaded section is provided with threads; Tooth-shaped positioning members are arranged on both the first positioning section and the second positioning section, and the locknut and the nipple are fixedly matched through the tooth-shaped positioning members; A limiting boss protruding along the inner surface of the locknut is arranged between the second positioning section and the installation section, and the limiting section is in limiting cooperation with the limiting boss.

2. The live connection fitting according to claim 1, characterized in that, A sealing section is further arranged between the threaded section and the first positioning section, and a sealing member is sleeved on the surface of the sealing section.

3. The flexible joint according to claim 1, wherein: The tooth-shaped positioning member of the first positioning section is an external spline tooth, and the tooth-shaped positioning member of the second positioning section is an internal spline tooth.

4. The flexible joint according to claim 3, characterized in that: The angle of each tooth in the tooth-shaped positioning member is 60-120°; 5. The live connection fitting according to claim 3, characterized in that, The number of teeth of the tooth-shaped positioning member is 60-120 teeth; 6. The live connection fitting according to claim 3, characterized in that, The cross-section of the outer surface of the installation section is polygonal; 7. The live connection fitting according to claim 1, characterized in that, The limiting section is provided with a flange; 8. The live connection fitting according to claim 1, characterized in that, The threaded section is an external thread.

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