A plastic plug

Abstract

The utility model discloses a kind of plastic plug, it is related to pipeline accessory technical field.It includes plug body and sealing element, plug body includes limiting section and plugging section, limiting section is located at the end of plugging section, and diameter is greater than plugging section;Sawtooth thread sharp teeth and sealing groove are set on plugging section, sawtooth thread sharp teeth are located at one side close to limiting section, sealing groove is located at one side away from limiting section, sealing element is contained in sealing groove.Through setting sawtooth thread sharp teeth, so that plastic plug is rotated into pipeline and is closely connected with pipeline, in pressure maintaining process, the close contact of thread sharp teeth and pipeline makes pipeline and plastic plug jointly bear the pressure of test process, reduces the plastic deformation rate and fatigue damage of plastic plug, so that the plastic plug can be reused;At the same time, due to the setting of sawtooth thread sharp teeth, the connection of plastic plug and pipeline is also more closely, and the pressure maintaining test stability is high.

Description

Technical Field

[0001] This utility model relates to the field of pipe fittings technology, and more specifically, to a plastic plug. Background Technology

[0002] With the rapid development of modern construction and infrastructure, pipeline systems, as crucial carriers for water supply, drainage, and heating, directly impact the safety and reliability of the entire system through their installation quality. Pipeline system installation typically involves multiple stages, including pipe cutting, connection, and laying. Connection methods between pipes and fittings include crimping, heat fusion, and threaded connections. To ensure the sealing and integrity of the pipeline system, a pressure test is required after installation; this is a critical step in verifying the installation quality.

[0003] Currently, the standard procedure for pressure testing pipeline systems includes: sealing one end of the pipeline with a special plug, connecting the other end to pressure testing equipment for pressurization, maintaining the pressure for a certain period of time after reaching the specified pressure, and observing pressure changes. If there is no significant pressure drop, it indicates that the pipeline system has no obvious leaks and the installation is basically qualified; otherwise, it is necessary to investigate and repair the leak. After completing the pressure holding test, the plug needs to be removed to install faucets, valves, and other terminal equipment. Commonly used plugs for sealing include crimp-type and nut-type plugs. Crep-type plugs require a special crimping tool and cannot be reused; while nut-type plugs can be installed with a wrench, they also cannot be reused.

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

[0005] The purpose of this invention is to provide a plastic plug.

[0006] This utility model is implemented as follows: In a first aspect, this utility model provides a plastic plug, including a plug body and a sealing element. The plug body includes a limiting section and a sealing section. The limiting section is located at one end of the sealing section and has a diameter larger than that of the sealing section. The sealing section is provided with a sawtooth thread tip and a sealing groove. The sawtooth thread tip is located on the side close to the limiting section, and the sealing groove is located on the side away from the limiting section. The sealing element is accommodated in the sealing groove.

[0007] By setting serrated thread tips, the plastic plug can be tightly engaged with the pipe after being screwed in. During the pressure holding process, the tight contact between the thread tips and the pipe allows the pipe and the plastic plug to share the pressure of the test, reducing the plastic deformation rate and fatigue damage of the plastic plug, making the plastic plug reusable. At the same time, the setting of serrated thread tips also makes the connection between the plastic plug and the pipe tighter, resulting in high stability of the pressure holding test.

[0008] In an optional implementation, the non-working surface of the sawtooth thread tip faces the limiting section.

[0009] The sawtooth thread tip, due to its double-sided asymmetrical structure, enhances the connection force with the pipe. Its double-sided asymmetrical structure consists of a working surface and a non-working surface. The working surface is a steeper slope, serving as the main force-bearing surface in contact with the pipe; the non-working surface is a gentler slope, reducing resistance when removing the plastic plug.

[0010] When the plastic plug is screwed into the pipe, the serrated thread design can seal the plug and make close contact with the pipe, sharing the pressure and preventing it from being damaged by pressure, which is conducive to reuse. When the plastic plug is removed from the pipe, the serrated thread design can reduce resistance and prevent damage during the removal process, which is also conducive to reuse.

[0011] In an optional implementation, the parameters of the sawtooth thread tip include: the angle of the working face is 40°~50°, the angle of the non-working face is 1°~10°, and the tooth height is 0.5~0.8mm.

[0012] In an optional implementation, a guide zone is provided in the section of the blocking section that is far from the limiting section.

[0013] In an optional implementation, the guide area is a tapered guide surface.

[0014] By setting a tapered guide surface on the sealing section, the tapered guide surface can guide the plastic plug as it is screwed into the pipe, which is beneficial for the sealing ring of the plastic plug to be screwed into the pipe.

[0015] In an optional implementation, the number of sealing grooves is at least two, and the number of sealing elements is equal to the number of sealing grooves, and they are set in a one-to-one correspondence.

[0016] By setting multiple sealing grooves, multiple sealing effects can be achieved with a number of plugs, thereby improving the sealing performance of the pipeline during the testing process.

[0017] In an optional embodiment, the limiting section is provided with a polygonal fastening part, which includes either a hexagonal fastening part or an octagonal fastening part, so that the installer can screw the plastic plug into the pipe.

[0018] In an optional embodiment, the polygonal fastener includes any one of internal hexagonal, external hexagonal, internal octagonal, and external octagonal.

[0019] Since the diameter of the limiting component is larger than that of the sealing section and it is located on one side of the sealing section, and it is provided with polygonal fastening parts, the limiting component is used to limit the plastic plug during installation and at the same time provide an operating area for the installation of the plastic plug.

[0020] This utility model has the following beneficial effects: This invention provides a plastic plug. By setting serrated thread tips, the plastic plug can be tightly engaged with the pipe after being screwed in. During the pressure holding process, the tight contact between the thread tips and the pipe allows the pipe and the plastic plug to share the pressure of the test, reducing the plastic deformation rate and fatigue damage of the plastic plug, and enabling the plastic plug to be reused. At the same time, the setting of serrated thread tips also makes the connection between the plastic plug and the pipe tighter, resulting in high stability of the pressure holding test. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A front view of the plastic plug provided in an embodiment of this utility model; Figure 2 A perspective view of the plastic plug provided in an embodiment of this utility model; Figure 3 A front view of the plug body provided in an embodiment of this utility model; Figure 4 A side view of the plug body provided in an embodiment of this utility model.

[0023] Explanation of main component symbols: 100-Plastic plug; 110-Plug body; 111-Limiting section; 1111-Polygonal fastening part; 112-Sealing section; 1121-Sawtooth thread tip; 1122-Sealing groove; 1123-Guide area; 120-Seal. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0031] Example Please refer to Figure 1 and Figure 2This embodiment provides a plastic plug 100, including a plug body 110 and a sealing element 120. The plug body 110 includes a limiting section 111 and a sealing section 112. The limiting section 111 is located at one end of the sealing section 112 and has a diameter larger than the sealing section 112.

[0032] Please refer to Figure 2 and Figure 4 In this embodiment, the limiting section 111 is provided with polygonal fastening parts 1111, specifically two types: internal hexagonal and external hexagonal, so that the installer can screw the plastic plug 100 into the pipe.

[0033] In other embodiments, the polygonal fastener 1111 may be a single internal hexagon or external hexagon, or it may be an internal octagon and / or external octagon, etc.

[0034] Since the diameter of the limiting member is larger than that of the sealing section 112 and it is located on one side of the sealing section 112, and it is provided with a polygonal fastening part 1111, the limiting member is used to limit the plastic plug 100 during the installation process, and at the same time provide an operating area for the installation of the plastic plug 100.

[0035] Please refer to Figure 3 The sealing section 112 is provided with a sawtooth thread tip 1121 and a sealing groove 1122. The sawtooth thread tip 1121 is located on the side close to the limiting section 111, and the sealing groove 1122 is located on the side away from the limiting section 111. The sealing element 120 is accommodated in the sealing groove 1122.

[0036] By setting the sawtooth-shaped thread tips 1121, the plastic plug 100 is tightly engaged with the pipe after being screwed in. During the pressure holding process, the tight contact between the thread tips and the pipe allows the pipe and the plastic plug 100 to share the pressure of the test process, reducing the plastic deformation rate and fatigue damage of the plastic plug 100, and enabling the plastic plug 100 to be reused. At the same time, the setting of the sawtooth-shaped thread tips 1121 also makes the connection between the plastic plug 100 and the pipe tighter, resulting in high stability of the pressure holding test.

[0037] In an optional embodiment, the non-working surface of the sawtooth thread tip 1121 faces the limiting section 111. Due to its double-sided asymmetrical structure, the sawtooth thread tip 1121 enhances its connection force with the pipe; its double-sided asymmetrical structure consists of a working surface and a non-working surface. The working surface is a steeper slope, serving as the main force-bearing surface in contact with the pipe; the non-working surface is a gentler slope, reducing resistance when removing the plastic plug 100.

[0038] When the plastic plug 100 is screwed into the pipe, the serrated thread tips 1121 are designed to seal and make tight contact with the pipe, sharing the pressure and preventing it from being damaged by pressure, which is conducive to reuse. When the plastic plug 100 is removed from the pipe, the serrated thread tips 1121 are designed to reduce resistance and prevent damage during the process, which is also conducive to reuse.

[0039] In this embodiment, the parameters of the sawtooth thread tip 1121 include: the angle of the working surface is 40°~50°, the angle of the non-working surface is 1°~10°, and the tooth height is 0.5~0.8mm.

[0040] In this embodiment, there are two sealing grooves 1122, and the number of sealing elements 120 is also two, which correspond one-to-one with the number of sealing grooves 1122. By setting two sealing grooves 1122, a double sealing effect is achieved for the two plugs, improving their sealing performance on the pipeline during testing.

[0041] In this embodiment, a guide area 1123 is provided in the section of the blocking section 112 that is far away from the limiting section 111. The guide area 1123 is a tapered guide surface.

[0042] Because the plastic plug 100 is fitted with a sealing element 120, and the outer diameter of the sealing element 120 is slightly larger than the maximum outer diameter of the sealing section 112 of the plastic plug 100 in order to achieve its sealing effect, the sealing element 120 will come into contact with the pipe when the plastic plug 100 is installed, making it difficult to install. In this embodiment, a tapered guide surface is provided on the sealing section 112. When the plastic plug 100 is screwed into the pipe, the tapered guide surface can play a guiding role, which is conducive to the sealing ring of the plastic plug 100 being screwed into the pipe.

[0043] The plastic plug 100 provided in this embodiment can be injection molded from a plastic with high hardness, such as a composite material of polyoxymethylene (POM) and glass fiber or a plastic with high hardness such as polyphenylene sulfone (PPSU). The injection molding method can adopt existing processes.

[0044] The plastic plug 100 provided in this embodiment operates as follows: Two sealing elements 120 (e.g., sealing rings) are respectively fitted into the two sealing grooves 1122 of the sealing section 112 of the plug body 110 to obtain a plastic plug 100.

[0045] Insert the sealing section 112 of the plastic plug 100 into the pipe, starting from one side of the guide area 1123. The tapered guide surface guides the insertion of the sealing section 112. During insertion, a wrench can be used to apply a tightening force to the internal or external hexagonal joint of the limiting section 111 to assist the plastic plug 100 in insertion. After insertion, the serrated thread tips 1121 fully contact the inner wall surface of the pipe, and the two sealing elements 120 also fully contact the inner wall surface of the pipe, achieving a tight connection between the plastic plug 100 and the pipe, allowing for pressure testing.

[0046] After the pressure test is completed, use a wrench to apply pressure to the internal or external hexagon of the limit section 111 to unscrew the plastic plug 100 for future use.

[0047] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A plastic plug, characterized in that, The device includes a plug body and a seal. The plug body includes a limiting section and a sealing section. The limiting section is located at one end of the sealing section and has a diameter larger than that of the sealing section. The sealing section is provided with a sawtooth thread and a sealing groove. The sawtooth thread is located on the side closer to the limiting section, and the sealing groove is located on the side away from the limiting section. The seal is accommodated in the sealing groove.

2. The plastic plug according to claim 1, characterized in that, The non-working surface of the sawtooth thread tip faces the limiting section.

3. The plastic plug according to claim 1 or 2, characterized in that, The parameters of the sawtooth thread tip include: the angle of the working surface is 40°~50°, the angle of the non-working surface is 1°~10°, and the tooth height is 0.5~0.8mm.

4. The plastic plug according to claim 1, characterized in that, A guide zone is provided in the section of the blocking section that is far from the limiting section.

5. The plastic plug according to claim 4, characterized in that, The guide area is a tapered guide surface.

6. The plastic plug according to claim 1, characterized in that, The number of sealing grooves is at least two, and the number of sealing elements is equal to the number of sealing grooves, and they are set in a one-to-one correspondence.

7. The plastic plug according to claim 1, characterized in that, The limiting segment is provided with a polygonal fastening part, which includes either a hexagonal fastening part or an octagonal fastening part.

8. The plastic plug according to claim 7, characterized in that, The polygonal fastener includes any one of the following: internal hexagon, external hexagon, internal octagon, and external octagon.

Images