Pipeline inspection opening sealing structure

Abstract

The utility model discloses a pipeline inspection opening sealing structure. The technical problem that an existing pipeline inspection opening is poor in sealing effect is solved. The inspection opening body is communicated with the corresponding position of a pipe fitting, the sealing cover is in threaded connection with the inspection opening body and used for sealing the inspection opening body, the first sealing ring is arranged between the sealing cover and the end face of the inspection opening body, and a plug tongue with the outer edge correspondingly matched with the inner edge of the inspection opening body is arranged in the center of the sealing cover. A second sealing ring is relatively and fixedly arranged on the outer edge of the plug tongue, an annular concave table is arranged on the outer edge of the end of the plug tongue, and an annular boss correspondingly matched with the annular concave table is arranged on the inner edge of the inspection opening body. The sealing structure has the advantages of excellent sealing effect, high sealing reliability and the like.

Description

Technical Field

[0001] The present application relates to the technical field of water supply and drainage, and in particular to a pipeline inspection port sealing structure. Background Art

[0002] As an important part of the drainage system, the main function of the drain pipe inspection port is to facilitate the inspection, maintenance, cleaning and monitoring of sewage pipes.

[0003] Drain inspection ports are usually located at the turning or branching points of the drain pipe. The main purpose is to provide a convenient entrance to the pipe so that the staff can perform necessary maintenance, cleaning and inspection operations. Generally, the drain inspection port is installed at the turning point of the drainage pipe or in a hard-to-reach place so that the cover can be opened to inspect and remove dirt. At the same time, for ease of use, the inspection port is usually set at an easily accessible position indoors or in the drainage pipe line.

[0004] The sealing of the inspection port of the drain pipe is not only related to the normal operation of the drainage system, but also to the overall safety and sanitation of the building. An effective seal can prevent sewage leakage, reduce the spread of odor, and ensure the unobstructed flow of drainage pipes. Usually, the sealing of the inspection port of the drain pipe adopts the rubber sealing ring sealing method: the rubber sealing ring is a common, simple and effective sealing method. It is usually placed at the connection between the inspection port and the pipe, and achieves a tight fit and seal through the elasticity and corrosion resistance of the rubber. However, if the sealing ring is not installed in place or the sealing ring is aged, the sealing performance at the inspection port will drop sharply, which may cause leakage and other problems, affecting the normal operation of the drainage system.

[0005] The information disclosed in this background technology section is only used to deepen the understanding of the background technology of the present disclosure, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to those skilled in the art. Summary of the invention

[0006] In view of at least one of the above technical problems, the present disclosure provides a pipeline inspection port sealing structure, aiming to solve the technical problem of poor sealing effect of existing pipeline inspection ports.

[0007] According to one aspect of the present disclosure, a pipeline inspection port sealing structure is provided, comprising an inspection port body connected to a corresponding position of a pipe fitting, a sealing cover threadedly connected to the inspection port body and used to seal the inspection port body, a first sealing ring arranged between the sealing cover and the end face of the inspection port body, a plug tongue with an outer edge corresponding to the inner edge of the inspection port body provided at the center of the sealing cover, a second sealing ring relatively fixedly arranged at the outer edge of the plug tongue, an annular concave platform provided at the outer edge of the end of the plug tongue, and an annular convex platform corresponding to the annular concave platform provided at the inner edge of the inspection port body. Thus, through the double sealing structure of the first sealing ring and the second sealing ring, the sealing strength and reliability of the inspection port are enhanced, and a relatively good sealing effect can be maintained even when the sealing cover is loose and the sealing ring is aged.

[0008] In some embodiments of the present disclosure, the plug tongue is a hollow annular body, thereby reducing the injection molding amount during the production of the sealing cover, and reducing the production cost while ensuring the sealing effect remains unchanged.

[0009] In some embodiments of the present disclosure, the inner edge of the inspection port body and the outer edge of the plug tongue are correspondingly matched flared reducers, which can facilitate the plug tongue to be screwed into the inspection port body, avoiding the misalignment of the second sealing ring during the screwing process and affecting the sealing, thereby helping to improve the sealing effect and sealing reliability.

[0010] In some embodiments of the present disclosure, the second sealing ring is a sealing ring with a circular cross-section.

[0011] In some embodiments of the present disclosure, the second sealing ring is a lip sealing ring.

[0012] In some embodiments of the present disclosure, an annular groove for engaging and setting the second sealing ring is provided at the outer edge of the plug tongue. The annular groove helps to realize the positioning and installation of the second sealing ring, thereby preventing the second sealing ring from being misaligned due to friction between the second sealing ring and the inspection port body when the sealing cover rotates, resulting in sealing failure.

[0013] In some embodiments of the present disclosure, when the plug tongue is screwed into the inspection port body to the maximum extent, a gap exists between the annular concave platform and the annular convex platform, and a third sealing ring having a height greater than the gap is provided between the annular concave platform and the annular convex platform. The third sealing ring can further improve the sealing effect of the inspection port to avoid leakage.

[0014] In some embodiments of the present disclosure, the outer edge of the annular boss is correspondingly matched with the outer edge of the annular recess. The cooperation between the annular boss and the annular recess can increase the tortuosity of the sealing path, thereby helping to improve the sealing effect, and the outer edge of the annular boss is matched with the outer edge of the annular recess, which can reduce the sealing pressure by reducing the infiltration amount of the sealing path, thereby achieving the purpose of improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural cross-sectional view of a pipeline inspection port in one embodiment of the present application.

[0016] Figure 2 Schematic diagram of the structure of a sealing cover in one embodiment of the present application.

[0017] Figure 3 This is a structural cross-sectional view of a pipeline inspection port in another embodiment of the present application.

[0018] Figure 4 It is a schematic structural diagram of a sealing cover in another embodiment of the present application.

[0019] In the above figures, 1 is a pipe fitting, 11 is an inspection port body, 2 is a sealing cover, 21 is a plug tongue, 3 is a first sealing ring, 4 is a second sealing ring, 5 is a third sealing ring, and 6 is an annular concave platform. DETAILED DESCRIPTION

[0020] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", "horizontal", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application 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 therefore cannot be understood as a limitation on the present application. The terms "first", "second", "third", etc. involved in the present application are used to distinguish the objects described and do not have any order or technical meaning.

[0021] In order to better understand the technical solution of the present application, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] This example discloses a pipeline inspection port sealing structure to solve the technical problem that the existing pipeline inspection port sealing structure has poor sealing properties and is prone to leakage. Figure 1 The pipeline inspection port sealing structure includes an inspection port body 11 connected to the pipe fitting 1 and a sealing cover 2 for sealing the inspection port body 11. In this embodiment, the inspection port body 11 and the sealing cover 2 are threadedly connected, the outer edge of the end of the inspection port body 11 is provided with an external thread, and the inner edge of the cover of the sealing cover 2 is provided with a corresponding internal thread, so that the sealing cover can be conveniently opened through the threaded connection when there is a need to inspect the pipeline system, and the relevant inspection and maintenance operations can be carried out deep into the pipeline through the port of the inspection port body.

[0023] Since the thread sealing effect is limited, in order to avoid leakage at the threaded connection between the inspection port body 11 and the sealing cover 2, see Figure 1 In this example, a first sealing ring 3 is installed at the bottom of the sealing cover 2. In this embodiment, the cross-section of the first sealing ring 3 is rectangular. As the sealing cover 2 is gradually tightened to close the inspection port body 11, the first sealing ring 3 contacts the end surface of the inspection port body 11. As a result, the two sides of the first sealing ring 3 contact the sealing cover 2 and the end surface of the inspection port body respectively, and deform after being squeezed by the two, thereby closing the gap between the sealing cover 2 and the inspection port body, thereby realizing the first seal.

[0024] When the pipeline is vibrated by external forces or affected by the operation of construction personnel, resulting in failure to tighten and seal the first sealing ring, the sealing of the first sealing ring will fail. Figure 1 and Figure 2 In this embodiment, a plug tongue 21 is provided at the center of the sealing cover 2. In this embodiment, the plug tongue 21 and the sealing cover 2 are an integral injection molding structure. In addition, the plug tongue 21 and the sealing cover 2 are coaxially arranged so that when the sealing cover 2 corresponds to the inspection port body 11, the plug tongue 21 can be filled into the inspection port body 11. In order to enhance the sealing effect, a second sealing ring 4 is provided at the outer edge of the plug tongue 21. Considering that there is friction between the plug tongue 21 and the inner edge of the inspection port body 11 when the plug tongue 21 is screwed into the inspection port body 11 with the sealing cover 2, in order to prevent the friction from causing the second sealing ring 4 to move and not coaxial with the plug tongue 21, thereby affecting the sealing effect, in this embodiment, an annular groove for positioning the second sealing ring 4 is provided at the outer edge of the plug tongue 21, and the second sealing ring 4 is pre-fitted and assembled into the annular groove. After being screwed into the inspection port body 11, the second sealing ring 4 is deformed, thereby sealing the gap between the outer edge of the plug tongue 21 and the inner edge of the inspection port body 11, thereby achieving a second seal.

[0025] In this embodiment, in order to reduce the production cost while ensuring the sealing effect remains unchanged, see Figure 1 The plug tongue 21 is a hollow annular body, which can reduce the injection molding of the cavity in the middle of the plug tongue, save the injection molding materials and reduce the production cost. When the inspection port is located directly below the pipe fitting, the cavity at the plug tongue can also play the role of depositing debris in the pipeline, and the sediment can be easily cleaned by opening and closing the sealing cover. In addition, in this example, in order to facilitate the assembly of the second sealing ring 4 in the annular groove at the plug tongue, the layout height of the annular groove is greater than the height of the sealing cover, so that the annular groove is located in the part of the plug tongue protruding from the sealing cover, avoiding the sealing cover affecting the assembly operation space.

[0026] In this embodiment, the second sealing ring 4 is a sealing ring with a circular cross section. In some other embodiments, the second sealing ring is a lip-shaped sealing ring, which is a single-lip type or a multi-lip type, thereby achieving sealing through the contact between the sealing lip and the inner edge of the inspection port body 11. Therefore, a double sealing structure is formed by the first sealing ring 3 and the second sealing ring 4, thereby improving the sealing reliability. Even if the sealing cover is not tightened due to the influence of the construction personnel and the first sealing ring fails, the contact sealing between the second sealing ring and the inspection port body 11 can still maintain a good sealing effect.

[0027] See also Figure 1 and Figure 2 In this example, an annular concave platform 6 is provided at the outer edge of the end of the plug tongue, and an annular boss matching the annular concave platform 6 is provided at the inner edge of the inspection port body 11, wherein the outer edge contour of the annular boss matches the outer edge contour of the annular concave platform 6, and after the sealing cover 2 is tightened accordingly, that is, when the plug tongue 21 is screwed into the inspection port body 11 to the maximum extent, there is a certain gap between the annular concave platform 6 and the annular boss, so that the third sealing ring 5 can be filled and set in the gap to further enhance the sealing effect. In order to ensure the sealing effect of the third sealing ring 5, in this example, the height of the third sealing ring 5 is greater than the minimum gap between the annular concave platform 6 and the annular boss, so that the third sealing ring 5 is squeezed and deformed as the plug tongue is screwed in, thereby blocking the leakage path and achieving sealing. In some other embodiments, the outer edge of the annular boss matches and fits with the outer edge of the annular concave platform, thereby achieving a certain degree of blocking effect through the contact between the two, reducing the amount of water that penetrates into the rear leakage path, thereby helping to enhance the sealing effect of the pipeline structure. In some other embodiments, the annular boss, the annular recess and the corresponding third sealing ring are eliminated, and the sealing effect is ensured only by the double sealing structure of the first sealing ring and the second sealing ring.

[0028] In addition, in some other embodiments, see Figure 3 and Figure 4 The inner edge of the inspection port body 11 is in a trumpet-shaped expansion shape from the junction with the pipe fitting to the end face of the inspection port body. Correspondingly, the plug tongue 21 at the sealing cover 2 is in a trumpet-shaped expansion shape that matches the inner edge of the inspection port body 11. Therefore, the second sealing ring 4 can be loaded more conveniently through this variable diameter structure, avoiding the problem that the gap between the plug tongue and the inner edge of the inspection port body 11 is too small, and the second sealing ring 4 protrudes from the outer edge of the plug tongue, thereby affecting the plug tongue from being screwed into the inspection port body 11 or the second sealing ring 4 is separated from the annular groove during the rotation of the plug tongue, thereby affecting the sealing effect. This reduces the difficulty of assembly and improves the reliability of sealing. In this embodiment, the variable diameter plug tongue provides another form of hollow structure, in which a cylindrical hollow is provided in the middle, see Figure 3 The hollow opening is located at the outer end surface of the sealing cover, thereby reducing the amount of material used during injection molding, thereby achieving the purpose of reducing costs.

[0029] Although some preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0030] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the inventive concept. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A pipeline inspection port sealing structure, characterized in that: It includes an inspection port body connected to a corresponding position of a pipe fitting, a sealing cover threadedly connected to the inspection port body and used to close the inspection port body, and a first sealing ring arranged between the sealing cover and the end face of the inspection port body; a plug tongue with an outer edge corresponding to and matching the inner edge of the inspection port body is arranged at the center of the sealing cover; a second sealing ring is relatively fixedly arranged at the outer edge of the plug tongue; an annular recess is arranged at the outer edge of the end of the plug tongue; and an annular boss corresponding to and matching the annular recess is arranged at the inner edge of the inspection port body.

2. The pipeline inspection port sealing structure according to claim 1, characterized in that: The plug tongue is a hollow annular body.

3. The pipeline inspection port sealing structure according to claim 1, characterized in that: The inner edge of the inspection port body and the outer edge of the plug tongue are correspondingly matched bell-mouth reducers.

4. The pipeline inspection port sealing structure according to claim 1 or 3, characterized in that: The second sealing ring is a sealing ring with a circular cross section.

5. The pipeline inspection port sealing structure according to claim 1 or 3, characterized in that: The second sealing ring is a lip sealing ring.

6. The pipeline inspection port sealing structure according to claim 1 or 3, characterized in that: An annular groove for engaging and setting the second sealing ring is provided at the outer edge of the plug tongue.

7. The pipeline inspection port sealing structure according to claim 1 or 3, characterized in that: When the plug tongue is screwed into the inspection port body to the maximum extent, a gap exists between the annular recess and the annular projection, and a third sealing ring having a height greater than the gap is provided between the annular recess and the annular projection.

8. The pipeline inspection port sealing structure according to claim 1 or 3, characterized in that: The outer edge of the annular boss is correspondingly fitted and matched with the outer edge of the annular recess.

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