Self-locking sealing joint of polyethylene drainage pipe

Abstract

The utility model provides a self-locking sealing joint of a polyethylene drainage pipe, and relates to the technical field of drainage pipes. The self-locking sealing joint comprises a first polyethylene pipe body and a second polyethylene pipe body, wherein one end of the first polyethylene pipe body is provided with external threads; an internal thread is arranged at one end of the second polyethylene pipe body; wherein an annular butt joint groove is formed in the second polyethylene pipe body in the circumferential direction and used for being matched with the first polyethylene pipe body in a butt joint mode, and the internal thread is arranged in the annular butt joint groove; the annular silica gel pad is arranged at the bottom of the annular butt joint groove; the reinforcing structure comprises a first metal spiral coil and a second metal spiral coil, the first metal spiral coil is arranged in the first polyethylene pipe body, and the second metal spiral coil is arranged in the second polyethylene pipe body. According to the self-locking sealing connector, through threaded connection, self-adaptive sealing of the annular silica gel pad and the metal spiral ring, the structural strength of the pipe body is enhanced, and the water leakage prevention performance is comprehensively improved from the two aspects of sealing and structural reinforcement.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drainage pipe technical field, specifically, relates to a self-locking sealing joint of polyethylene drainage pipe. BACKGROUND

[0002] Polyethylene drainage pipe is a kind of pipe material for drainage made of polyethylene as main raw material.It has the characteristics of light weight, corrosion resistance, can effectively resist the erosion of various chemical substances, including common chemical substances such as acid and alkali, so it can be used stably for a long time in complex soil and water quality environment.Its inner wall is smooth, and water flow resistance is small, which is beneficial to smooth drainage, and it also has certain flexibility and impact resistance, can be moderately bent during installation, facilitate construction, and can withstand a certain degree of external pressure and impact, not easy to break, widely used in building drainage, municipal drainage, rainwater discharge and many other drainage systems.

[0003] In the prior art, the joint connecting structure of polyethylene drainage pipe is mostly connected in a threaded manner.Due to the complex working environment of polyethylene drainage pipe, when long-term sustained impact of water flow inside the pipe, as well as expansion stress caused by external complex geological conditions and temperature changes, the threaded connection part is prone to looseness.Once loosened, the gap between the threads originally closely fitted will increase, which provides a channel for water leakage.And during installation, if the construction personnel's operation is not accurate enough, resulting in the threads not being completely matched and tightened, even if there is only a very tiny gap, it will also gradually expand the leakage range under the action of water flow accumulated day by day, eventually causing serious water leakage problem, bringing great hidden danger to the normal operation of the drainage system. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a self-locking sealing joint of polyethylene drainage pipe, which aims to solve the technical problems in the above background technology.

[0005] The embodiment of the utility model is implemented as follows:

[0006] The embodiment of the present application provides a self-locking sealing joint of a polyethylene drainage pipe, which comprises: a first polyethylene pipe body, one end of which is provided with an external thread; a second polyethylene pipe body, one end of which is provided with an internal thread, which is matched with the external thread of the first polyethylene pipe body; wherein the internal circumference of the second polyethylene pipe body is provided with an annular butt joint groove, which is matched with the first polyethylene pipe body, and the internal thread is arranged in the annular butt joint groove; an annular silica gel pad arranged at the bottom of the annular butt joint groove, the outer diameter value of which is greater than the inner diameter value of the second polyethylene pipe body; and a reinforcing structure comprising a first metal spiral and a second metal spiral, the first metal spiral is arranged in the interior of the first polyethylene pipe body and is spirally arranged along the circumferential direction of the first polyethylene pipe body, and the second metal spiral is arranged in the interior of the second polyethylene pipe body and is spirally arranged along the circumferential direction of the second polyethylene pipe body.

[0007] Further, based on the foregoing scheme, the external thread of the first polyethylene pipe body is wound with a raw material belt.

[0008] Further, based on the foregoing scheme, the internal circumferential surface of the first polyethylene pipe body is provided with a first water-swelling rubber layer, which is arranged in the interior of the external thread, and the internal circumferential surface of the first water-swelling rubber layer is provided with a first rigid positioning sleeve.

[0009] Further, based on the foregoing scheme, the external circumferential surface of the second polyethylene pipe body is provided with a second water-swelling rubber layer, which is arranged outside the internal thread, and the external circumferential surface of the second water-swelling rubber layer is provided with a second rigid positioning sleeve.

[0010] Further, based on the foregoing scheme, the external thread is provided with a first water-permeable hole for communicating with the first water-swelling rubber layer, and the internal thread is provided with a second water-permeable hole for communicating with the second water-swelling rubber layer.

[0011] Further, based on the foregoing scheme, the number of the first water-permeable hole and the second water-permeable hole is multiple.

[0012] Further, based on the foregoing scheme, the external circumferential surface of the second polyethylene pipe body is provided with an annular mounting groove, and the second water-swelling rubber layer and the second rigid positioning sleeve are arranged in the annular mounting groove.

[0013] Wherein, the outer side surface of the second rigid positioning sleeve is flush with the outer side surface of the second polyethylene pipe body.

[0014] Compared with the prior art, the embodiment of the present application has at least the following advantages or beneficial effects:

[0015] The self-locking sealing joint of the polyethylene drainage pipe of the embodiment of the present application is connected, the first polyethylene pipe body is inserted into the annular butt joint groove, cooperates with the external thread and the internal thread, and is connected in the second polyethylene pipe body. At the same time, the first polyethylene pipe body port and the annular butt joint groove bottom are butt jointed by the annular silica gel pad, effectively preventing water from leaking from the annular butt joint groove. When the water pressure in the pipe changes, the silica gel pad can self-adaptively adjust the sealing state, further guaranteeing the sealing property. The first and second metal spiral turns are respectively spirally arranged along the circumferences of the first and second polyethylene pipe bodies, greatly enhancing the pipe body structure strength, reducing the pipe body deformation risk caused by external force impact and extrusion, and avoiding water leakage caused by the sealing failure of the joint due to the pipe body deformation. Overall, the joint improves the water leakage prevention performance in all directions through the sealing and structure reinforcement design. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 is a perspective view of the self-locking sealing joint of the polyethylene drainage pipe of the embodiment of the present application;

[0018] Figure 2 is a sectional view of the self-locking sealing joint of the polyethylene drainage pipe of the embodiment of the present application;

[0019] Figure 3 is Figure 2 is a partial enlarged view of A;

[0020] Figure 4 is Figure 2 is a partial enlarged view of B;

[0021] Figure 5 is a perspective view of the first polyethylene pipe body of the embodiment of the present application;

[0022] Figure 6 is a perspective view of the second polyethylene pipe body of the embodiment of the present application.

[0023] Figure legend: 100-first polyethylene pipe body, 200-external thread, 300-second polyethylene pipe body, 400-internal thread, 500-first metal spiral turn, 600-second metal spiral turn, 700-first water-swelling rubber layer, 701-first rigid positioning sleeve, 702-first water-permeable hole, 800-second water-swelling rubber layer, 801-second rigid positioning sleeve, 802-second water-permeable hole, 900-annular silica gel pad. DETAILED DESCRIPTION

[0024] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0025] Embodiment

[0026] Please refer to Figures 1-6 The self-locking sealing joint of the polyethylene drainage pipe provided by the embodiment of the present application comprises: a first polyethylene pipe body 100, one end of which is provided with an external thread 200; a second polyethylene pipe body 300, one end of which is provided with an internal thread 400, which is adapted to the external thread 200 of the first polyethylene pipe body 100; wherein the inside of the second polyethylene pipe body 300 is circumferentially provided with an annular butt joint groove, which is used for butt joint cooperation with the first polyethylene pipe body 100, and the internal thread 400 is arranged in the annular butt joint groove; an annular silica gel pad 900 arranged at the bottom of the annular butt joint groove, the outer diameter value of which is greater than the inner diameter value of the second polyethylene pipe body 300; and a reinforcing structure comprising a first metal spiral 500 and a second metal spiral 600, wherein the first metal spiral 500 is arranged inside the first polyethylene pipe body 100 and is spirally arranged along the circumferential direction of the first polyethylene pipe body 100, and the second metal spiral 600 is arranged inside the second polyethylene pipe body 300 and is spirally arranged along the circumferential direction of the second polyethylene pipe body 300.

[0027] When the self-locking sealing joint of the present application is connected, the first polyethylene pipe body 100 is inserted into the annular butt joint groove, and is connected in the second polyethylene pipe body 300 by cooperating the external thread 200 with the internal thread 400. At the same time, the port of the first polyethylene pipe body 100 and the bottom of the annular butt joint groove are butt jointed by the annular silica gel pad 900, which effectively prevents water from leaking from the annular butt joint groove. When the water pressure in the pipe changes, the silica gel pad can self-adaptively adjust the sealing state, further ensuring the sealing performance. The first and second metal spirals 600 are spirally arranged along the circumferential direction of the first and second polyethylene pipe bodies 300, respectively, which greatly enhances the structural strength of the pipe body, reduces the risk of pipe body deformation caused by external force impact and extrusion, and avoids water leakage caused by sealing failure at the joint due to pipe body deformation. Overall, the joint improves the water leakage prevention performance in all directions through sealing and structural reinforcement design.

[0028] As a more preferred embodiment, the external thread 200 of the first polyethylene pipe body 100 is wrapped with a raw material belt.

[0029] In the above embodiment, the raw material belt is wrapped on the external thread 200 of the first polyethylene pipe body 100, which can fill the tiny gaps between the threads. During installation, the raw material belt is deformed by extrusion, filling the thread gap and reducing the water leakage channel. Moreover, the raw material belt is soft in texture and can closely fit the threads, enhancing the sealing effect. Even when the water pressure fluctuates, it can also maintain good sealing performance, effectively improving the waterproof performance of the joint.

[0030] As a preferred embodiment, the inner circumferential surface of the first polyethylene pipe body 100 is provided with a first water-swelling rubber layer 700, which is arranged inside the external thread 200. The inner circumferential surface of the first water-swelling rubber layer 700 is provided with a first rigid positioning sleeve 701.

[0031] In the above embodiment, the first water-swelling rubber layer 700 arranged on the inner circumferential surface of the first polyethylene pipe body 100 is located inside the external thread 200. Once a small amount of water penetrates into the gap between the external thread 200 and the internal thread 400, the first water-swelling rubber layer 700 swells in water, which can further fill the small gap between the joint and enhance the sealing effect. The first rigid positioning sleeve 701 arranged inside the first water-swelling rubber layer 700 can provide stable support for the first water-swelling rubber layer 700, prevent it from deforming excessively during the swelling process, and ensure that the first water-swelling rubber layer 700 always plays a sealing role in the right position, while improving the stability and sealing of the entire pipe connection part.

[0032] As a preferred embodiment, the outer circumferential surface of the second polyethylene pipe body 300 is provided with a second water-swelling rubber layer 800, which is arranged outside the internal thread 400. The outer circumferential surface of the second water-swelling rubber layer 800 is provided with a second rigid positioning sleeve 801.

[0033] In the above embodiment, the second water-swelling rubber layer 800 arranged on the outer circumferential surface of the second polyethylene pipe body 300 is located outside the internal thread 400. When water contacts it, it will swell, further sealing the connection gap between the external thread 200 and the internal thread 400, and improving the overall waterproof sealing performance.

[0034] As a preferred embodiment, the external thread 200 is provided with a first water-permeable hole 702 for connecting the first water-swelling rubber layer 700, and the internal thread 400 is provided with a second water-permeable hole 802 for connecting the second water-swelling rubber layer 800.

[0035] In the above embodiment, the design of the first water-permeable hole 702 and the second water-permeable hole 802 enables the water seeping between the external thread 200 and the internal thread 400 to better contact the first water-swelling rubber layer 700 and the second water-swelling rubber layer 800, thereby improving the sealing effect.

[0036] As a preferred embodiment, the number of the first water-permeable hole 702 and the second water-permeable hole 802 is multiple.

[0037] In the above embodiment, the plurality of first water-permeable holes 702 and the plurality of second water-permeable holes 802 can improve the water permeation efficiency and improve the effect efficiency of the first water-swelling rubber layer 700 and the second water-swelling rubber layer 800.

[0038] As a preferred embodiment, the outer circumferential surface of the second polyethylene pipe body 300 is provided with an annular mounting groove, and the second water-swelling rubber layer 800 and the second rigid positioning sleeve 801 are arranged in the annular mounting groove.

[0039] The outer side surface of the second rigid positioning sleeve 801 is flush with the outer side surface of the second polyethylene pipe body 300.

[0040] In the above embodiment, the annular mounting groove on the outer circumferential surface of the second polyethylene pipe body 300 provides a stable mounting position for the second water-swelling rubber layer 800 and the second rigid positioning sleeve 801. The annular mounting groove makes the second water-swelling rubber layer 800 and the second rigid positioning sleeve 801 compactly arranged, avoiding displacement or damage caused by external impact and the like. The outer side surface of the second rigid positioning sleeve 801 is flush with the outer side surface of the pipe body, ensuring the flatness of the pipe body appearance and facilitating installation in narrow spaces or environments requiring close fitting.

[0041] In addition, unless otherwise specified or limited, in the embodiments of the present application, if the terms "mounting", "connecting" appear, they should be understood broadly, for example, "connecting" can be detachable connection or non-detachable connection; can be direct connection or indirect connection through intermediate medium. If the terms "upper", "lower", "left", "right", "inner", "outer", "side" and the like appear, they are only the direction of the drawing or the direction of the product in use, and are only for the purpose of clearly describing the present application, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as a limitation on the present application. The terms "first", "second" and the like are only used for distinction and cannot be understood as indicating or implying relative importance; "a plurality of" means at least two. In the embodiments of the present application, the relative positional relationship limitations such as parallel, perpendicular, aligned and the like are relative to the current process level and are not strictly limited, and a small amount of deviation is allowed, such as approximately parallel, approximately perpendicular, approximately aligned and the like. For example, A is parallel to B, which means that A and B are parallel or approximately parallel, and the included angle between A and B can be between 0 degrees and 10 degrees.

[0042] The above merely describes some embodiments and implementations of the present application, and the protection scope of the present application is not limited thereto, and the embodiments in the present application and the features in the embodiments can be combined with each other, and any combination of the features in different embodiments is also within the protection scope of the present application, and any changes or replacements that can be easily conceived by any person skilled in the art within the technical scope disclosed by the present application should be encompassed within the protection scope of the present application.

Claims

1. 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​ ​ ​ ​ ​ ​ 2. A self-locking sealing joint for polyethylene drain pipes according to claim 1, characterized in that ​ 3. A self-locking sealing joint for polyethylene drain pipes according to claim 1, characterized in that ​ 4. A self-locking sealing joint for polyethylene drain pipes according to claim 3, characterized in that ​ 5. A self-locking sealing joint for polyethylene drainage pipes according to claim 4, characterized in that ​ 6. A self-locking sealing joint for polyethylene drainage pipes according to claim 5, characterized in that ​ 7. A self-locking sealing joint for polyethylene drain pipes according to claim 6, characterized in that ​ ​

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