A buried container and a sealed connection device between the container and a pipeline

Abstract

The present invention discloses an underground container (10), comprising: a shell body (20); a containing space (22) surrounded by the shell body (20); an opening (30) arranged on a plastic / composite material component (21), the opening (30) comprising a through hole (31) and an opening flange (32); a pipe (50) connected to the opening (30), a sealing sleeve (40) arranged in the opening (30), and an upper end (42) of the sealing sleeve (40) ) is fixed to the upper end of the opening flange (32), the lower end (43) of the sealing sleeve (40) is placed on the inner side of the opening flange (32), and wherein the pipe (50) includes a pipe connecting end (52), the pipe connecting end (52) is accommodated in the sleeve body (41), and the outer side wall of the pipe connecting end (52) is adjacent to the inner side of the sealing sleeve (40), so that the opening (30) and the pipe connecting end (52) are sealed and connected via the sealing sleeve (40).

Description

Technical Field

[0001] The present invention relates to an underground container and a sealed connection device between a container and a pipeline, which is particularly suitable for the application of the underground container. In particular, the present invention improves the sealed connection between the underground container and its external pipeline, such as the sealed connection between the opening of a fiberglass reinforced plastic septic tank body and a material conveying pipeline. Background Art

[0002] Plastics and plastic-based composite materials, especially glass fiber reinforced plastics (GFRP; GRP; glass fiber reinforced plastics), are widely used in container preparation. For example, composite containers prepared by molding technology are particularly suitable for application in the field of environmental protection because of their high cost performance.

[0003] Glass fiber reinforced plastic is often called FRP, which refers to reinforced plastics with glass fiber as reinforcing material and synthetic resin as binder. For example, SMC sheet (sheet film plastic) is used as raw material, and is prepared into a plate through molding and curing, which is often used in assembling water tanks, swimming pools, etc. Similarly, FRP containers made by winding process are also well known in the art.

[0004] Because it is suitable for mass production, has ideal mechanical and physical properties and is corrosion-resistant, it has also been widely used in sewage treatment and fluid material storage devices that require isolation in recent years. In particular, it is suitable for preparing septic tanks. FRP septic tanks are equipment specifically used to treat domestic sewage and are also actively promoted composite material products.

[0005] The application of plastic containers is similar to that of composite materials, but fiber-reinforced composite materials have obvious advantages in mechanical and physical properties, especially strength.

[0006] [Discussion of related technologies]

[0007] Patent document 1: Chinese patent CN208440354U discloses a corrugated fiberglass septic tank.

[0008] Patent document 2: Chinese patent CN206127090U, entitled "A SMC molded fiberglass septic tank". The patent discloses an SMC molded fiberglass septic tank, including a tank body, which is divided into a primary decomposition zone, a deep decomposition zone, and a clarification zone, with a tie-bar partition between the three. Anaerobic bacteria decomposition tanks are provided on both sides of the deep decomposition zone, connecting pipes are provided between the anaerobic bacteria decomposition tanks, and a gas valve is provided above the clarification zone, and an air guide pipe is connected to the gas valve.

[0009] Patent document 3: Chinese patent CN204174055U, which relates to a molded FRP septic tank. Its technical solution is: two discharge ports are provided on the top of the FRP tank body, water inlets and drain ports are provided on both sides of the FRP tank body, and a base is provided at the bottom. The outer wall of the FRP tank body is a corrugated structure, and radial reinforcement ribs and axial reinforcement ribs are provided on the outer wall. Two groups of circular support baffles are provided inside the FRP tank body to separate three cavities. The support baffles are connected to the inner side of the radial reinforcement ribs to form a vertical compressive support system; a connecting port is provided on the upper part of the support baffle.

[0010] Patent document 4: Chinese patent CN205133598U, entitled "Mechanically molded fiberglass top-pressure biogas tank", discloses a mechanically molded fiberglass top-pressure biogas tank, including a tank body, a top cover, a tank bottom, a hydraulic pipe, an inlet and outlet, a soft film round tube, an air guide pipe, a tank body, a top cover, and a tank bottom flange bolt combination into a rectangular biogas tank, two hydraulic tanks are installed above the top cover, and each hydraulic tank has an inlet and outlet in the middle. The biogas tank body, top cover, tank bottom, and hydraulic tank are all made of glass fiber and polyester resin film, placed in a cast steel mold, and made into a combination plate at high temperature and high pressure, which is connected by flanges, bolts, and sealed with sealant to form a biogas tank.

[0011] Patent document 5: Chinese patent CN204999079U, entitled "Molded FRP Spherical Water Storage Tank", discloses a molded FRP spherical water storage tank, which is made of FRP material in a cast steel mold under high temperature and high pressure to form two FRP hemispheres, and is sealed by a connecting flange, a bolt combination, and a sealing strip. The spherical water storage tank is used in arid areas with a shortage of groundwater sources. Rainwater and snow water are directly stored in underground water tanks for use as backup water for the production of residents and grassland herdsmen.

[0012] Patent document 6: Chinese patent CN207243698U proposes a mechanically wound fiberglass septic tank, including a shell, which improves the structural strength by setting reinforcing ribs and concentrates the structural stress on the reinforcing ribs. Furthermore, hemispherical grooves are used to disperse stress to avoid cracking at the reinforcing ribs due to stress concentration, which can effectively improve the structural strength.

[0013] Patent document 7: Chinese patent CN106365402A, which discloses a method for installing a fiberglass reinforced plastic septic tank, including foundation pit excavation and treatment.

[0014] The above-mentioned related technologies are incorporated herein by reference in their entirety in this application. Summary of the invention

[0015] [Technical issues to be solved]

[0016] In production practice, there has always been a need for improvement in the sealing connection between the external pipe and the container body. In particular, in the underground plastic / composite material container involved in the present invention, the opening of such storage container is usually formed with an outwardly protruding flange in an integrated manner for connecting the external pipe. In application, the vertical distance between the external pipe inlet of the underground container and the container interface is relatively large, resulting in an increase in the impact force when conveying materials, and factors such as the weight of the soil on the container, which impose a large load on the connection between the container and the pipe, easily causing the container to collapse, making the sealing connection a problem.

[0017] One conventional method is to sleeve the pipe outside the flange of the opening of the container body, and the pipe can be against the flange or the upper surface of the container, which is easy to seal and connect. However, this connection method is most likely to cause stress concentration on the flange and its vicinity, causing the container to collapse and cause container leakage.

[0018] To avoid the above unfavorable situation, another conventional technology is to insert the pipe into the opening of the container, apply adhesive to the outer wall of the pipe and / or the inner side of the flange to make the two sealed. It has been found that this method still has the following problems: 1) the installer needs to apply the adhesive on site, so it is difficult to ensure stable operation quality, resulting in failure and leakage in subsequent applications, and the pipe is easily pressed and displaced into the container; 2) the adhesive connection itself is unstable, and the adhesive is difficult to withstand the shear force applied by the connection for a long time, thus causing the above connection failure.

[0019] Taking septic tank applications as an example, once the connection or seal fails, for example, the seal between the manure inlet and the cleaning port of the septic tank and the installation pipe deteriorates, in areas with high groundwater levels, groundwater will seep back into the septic tank. Since a large amount of water has seeped into the container, it cannot normally receive the sewage or dirt to be discharged, causing the equipment to fail. Furthermore, incompletely decomposed fecal liquid seeps through the manure inlet and the cleaning port to the outside of the septic tank, causing groundwater pollution. This has become an urgent problem that needs to be solved in this field.

[0020] In addition, there is an even more unfavorable situation in practice for molded FRP products, see Appendix Figure 1 and attached Figure 3 In the existing arrangement, an opening 30 is arranged on the molded shell, and the opening 30 includes a through hole 31 and an opening flange 32 formed along the periphery of the through hole, wherein the opening flange 32 is arranged as a cylindrical structure, and has an opening flange inner cavity 34, and the inner diameter of the opening flange inner cavity 34 gradually increases from top to bottom, slightly forming a so-called conical cylinder or trumpet shape. Such an arrangement is to facilitate the smooth demolding of the workpiece in the molding process.

[0021] As described above, during the on-site installation process, glue is usually applied on the wall of the flange inner cavity 34 and / or on the outer side of the pipe connection end, and then the pipe connection end 52 is inserted into the flange inner cavity 34. Since the flange inner cavity 34 is small at the top and large at the bottom, the outer diameter of the pipe connection end 52 can match the inner diameter of the upper end of the flange inner cavity 34. However, since the flange inner cavity 34 gradually increases from top to bottom, when it is matched with the pipe, the gap between the two will also gradually increase. Therefore, the adhesive sealing connection is more difficult, and the pipe connection end 52 is easy to fall off and fall into the container, causing leakage at the interface.

[0022] The purpose of the present invention is to improve the technical problems existing in the above-mentioned prior art, and to solve the problem that the container and the pipeline are easy to debond or collapse in the prior art.

[0023] [Technical solution]

[0024] The present invention provides a novel buried container, the main body of which is mainly formed by plastic / composite material components. The present invention also provides an improved connection structure between the container and a pipeline, which can reduce or omit the gluing operation, thereby reducing the on-site installation operation hours and improving the installation quality and stability of the sealed connection, thereby ensuring the overall use effect of the relevant equipment.

[0025] The first aspect of the present invention:

[0026] Provided is an underground container, comprising: a shell body, at least a portion of which is formed by a plastic / composite material component; a receiving space surrounded by the shell body; an opening portion provided on the plastic / composite material component, the opening portion comprising a through hole and an opening portion flange, the opening portion flange being formed around the through hole and protruding toward the outside of the underground container; and a pipe connected to the opening portion. A sealing sleeve made of an elastomeric material is provided in the opening portion, the sealing sleeve comprising a sleeve body, the upper end of the sealing sleeve being fixed to the opening portion flange, the lower end of the sealing sleeve being placed on the inner side of the opening portion flange, and wherein the pipe comprises a pipe connection end, the pipe connection end being accommodated in the sleeve body, the outer side wall of the pipe connection end being adjacent to the inner side of the sealing sleeve, so that the opening portion and the pipe connection end are connected in an elastic sealing manner via the sealing sleeve.

[0027] The second aspect of the present invention:

[0028] A sealing connection device for a container and a pipeline is provided, comprising a sealing sleeve, wherein the sealing sleeve is made of an elastomeric material and comprises a sleeve body, wherein the container comprises: a shell body, at least a portion of which is formed by a plastic / composite material component; an opening portion provided on the plastic / composite material component, the opening portion comprising a through hole and an opening portion flange, the opening portion flange being formed around the through hole and protruding toward the outside of the container. wherein the pipeline comprises a pipeline connection end, which is connected to the opening portion. the sealing sleeve is installed in the opening portion, the upper end of the sealing sleeve is fixed to the upper end of the opening portion flange, the lower end of the sealing sleeve is placed on the inner side of the opening portion flange, and wherein the pipeline connection end is accommodated in the sleeve body, the outer side wall of the pipeline connection end is adjacent to the inner side of the opening portion flange via the sealing sleeve, so that the opening portion and the pipeline connection end are connected in an elastic sealing manner via the sealing sleeve.

[0029] The key point of the present invention is to provide a sealing sleeve made of an elastomeric material, the upper end of the sealing sleeve is fixed to the upper end of the opening flange on the container body, and the lower end of the sealing sleeve is placed on the inner side of the opening flange, that is, the sealing sleeve body is placed on the inner side of the cylindrical part of the opening flange. After that, the pipe connection end is inserted into the sleeve body. During this installation process, the sleeve body undergoes elastic deformation, which allows the pipe connection end to enter the opening of the container to a certain extent. However, as the pipe connection end moves, the sleeve body is squeezed by two components from the outer layer and the inner side at the same time, and the squeezing degree gradually increases. The pipe connection end is prevented from further inserting into the opening of the container, so that it is fixed in the opening of the container, and the sealing sleeve fills the gap between the pipe and the opening of the container.

[0030] In view of the above key ideas, the present invention also provides more implementation designs for the sleeve, so that those skilled in the art can easily understand the present invention, and provide a variety of variations for practicing the present invention to adapt to different specific applications or meet different cost requirements.

[0031] [Beneficial Effects]

[0032] The advantage of the present invention is that a sealing sleeve component made of elastomeric material is provided for connecting the opening of the plastic / composite component with an external pipe, which can not only provide sealing between the pipe and the opening of the container shell, but also serve as a mounting fixture.

[0033] Further description is provided below for the technical effects of the present invention. It is not intended that the present invention be limited to theoretical analysis. The principle analysis is provided below, and there is no intention to limit the scope of protection of the present invention. The purpose of the following analysis is only to help those skilled in the art better apply the present invention in practice and obtain better implementation effects.

[0034] The sealing sleeve component is placed between the container opening and the external pipe, and provides sufficient friction to fix the container opening and the external pipe to each other. Furthermore, with the help of the elastic seal between the two, the opening and the external pipe can move relative to each other to reach a preset position, and then obtain a mutual pressure fit effect under a certain pressure, so that the external pipe applies an extrusion force to the inner wall of the opening, and this extrusion force provides a fixed support effect between the two. Therefore, in the present invention, the supporting force provided by the container opening to the pipe, or the pressure applied by the pipe to the container opening, is effectively deflected from the vertical direction to avoid the collapse of the container opening and its vicinity due to excessive vertical force. As shown in the attached Figure 4 As shown, point A is the opening of the shell body close to the through hole, which bears the vertical force F1 applied by the pipeline and the extrusion force F2 applied by the pipeline. The resultant force F formed by the two deflects from the vertical. The reaction force of force F provides support for the pipeline.

[0035] In addition, the present invention provides further advantages, and is particularly advantageous for connecting the opening of a shell component that is formed by compression molding. In order to meet the requirements of the compression molding demoulding process, the interior of the opening flange provided on the compression molding component is generally cylindrical with a taper, that is, small at the top and large at the bottom, and slightly trumpet-shaped. When the pipe is matched with the trumpet-shaped cone, the gap between the two will gradually increase from top to bottom, and the difficulty of gluing and bonding will become more prominent. By using the sealing sleeve (40) of the present invention, it is easy to design according to the size of the opening formed by the compression molding process and the size of the outer wall of the pipe, so that the sealing sleeve (40) has a predetermined thickness change to effectively compensate for the change in the matching gap between the elastomeric material pipe and the trumpet-shaped cone. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] After reading the non-limiting embodiments of the present invention with reference to the accompanying drawings, those skilled in the art will easily understand the purpose and features of the present invention, which are described as follows:

[0037] Figure 1 A buried container and its pipe connection are schematically shown;

[0038] Figure 2 A schematic diagram showing a sealed connection between a container and a pipeline according to an embodiment of the present invention;

[0039] Figure 3 A sealing sleeve according to another embodiment of the present invention is schematically shown;

[0040] Figure 4 The force analysis of the container opening of the present invention subjected to pipeline pressure is schematically shown;

[0041] Figure 5 A sealing sleeve according to another embodiment of the present invention is schematically shown;

[0042] Figure 6 A sealing sleeve schematically illustrating another embodiment of the present invention; and

[0043] Figure 7 A schematic diagram showing the sealed connection between a container and a pipeline according to another embodiment of the present invention is shown. DETAILED DESCRIPTION

[0044] The following describes embodiments of the present invention in conjunction with the accompanying drawings. Similar reference numerals are used throughout the drawings to describe similar or identical components. The different features disclosed herein may be used alone or in combination with each other, and there is no intention to limit the present invention to the specific combinations described herein. Thus, the described embodiments are not intended to limit the scope of the claims.

[0045] The description may use the phrases "in one embodiment", "in an embodiment", "in some embodiments", or "in other embodiments", which may respectively refer to one or more of the same or different embodiments disclosed herein.

[0046] It should be understood that the features of the embodiments of the buried container / container, shell body, opening flange, and sealing sleeve disclosed herein can be a combination of different configurations. It should be understood that the embodiments of the container, buried container, pipeline, etc. of the present invention can include additional, reduced, or different components compared to those shown in the accompanying drawings. It should be understood that the features of the embodiments of the present invention can be a combination of different configurations or steps.

[0047] The present invention is particularly useful for improving the quality of pipe connections of underground containers. Therefore, the directions are described in the specification using underground containers as an example, i.e., top, bottom, upper end, and lower end are conventional directions for installation relative to the ground, to facilitate understanding of the assembly relationship. However, it is understood that these directions are relative directions. In assembly or other applications, the up and down directions are not limited to the geographical concept of up and down directions, but the up and down directions are understood to represent relative or opposite directions.

[0048] Although the drawings specifically illustrate the embodiments for the purpose of description and explanation, it should be understood that the disclosed processing methods and devices cannot constitute limitations of the present invention. It is easy for those skilled in the art to make various modifications to the aforementioned embodiments without departing from the scope of the present invention.

[0049] Figure 1A typical buried container 10 is shown as an example. The buried container 10 is buried under the ground 1. The buried container 10 includes: a shell body 20, at least a portion of which is formed by a plastic / composite component 21, and the shell body 20 surrounds a receiving space 22; and an opening 30 is provided on the plastic / composite component 21. In common applications, such as molded fiberglass septic tanks, typically, a molded upper shell and a molded lower shell are prepared, and the two are assembled to form a closed container.

[0050] See also Figure 2 The opening 30 includes a through hole 31 and an opening flange 32. The opening flange 32 is formed around the through hole 31 and protrudes toward the outside of the buried container 10. A pipeline 50 is connected to the opening 30 from the outside. A sealing sleeve 40 made of an elastomeric material is arranged in the opening 30. The sealing sleeve 40 includes a sleeve body 41. The sleeve body 41 is cylindrical. The upper end 42 of the sealing sleeve 40 is fixed to the opening flange 32, and the lower end 43 of the sealing sleeve 40 is placed on the inner side of the opening flange 32.

[0051] The pipe 50 includes a pipe connection end 52, which is accommodated in the sleeve body 41. The outer wall of the pipe connection end 52 is pressed or abutted against the inner wall of the sealing sleeve 40, so that the opening 30 and the pipe connection end 52 are sealed via the sealing sleeve 40. The sealing rubber sleeve between the outer wall of the pipe connection end 52 and the inner wall of the sealing sleeve 40 may be completely compressed and lack elasticity, or may still have a certain elasticity. In this way, the pipe 50 and the opening 30 are installed and fixed to each other by using the compression deformation of the sealing sleeve and the friction and extrusion force provided.

[0052] Through the pipe 50 and via the opening 30 , materials can be input from the outside of the shell body to the containing space 22 , or output from the containing space 30 to the outside of the shell body 20 .

[0053] During the installation process, the pipe connection end 52 is inserted into the sleeve body 41 in the flange inner cavity 34. Since the sealing sleeve 40 made of elastomeric material is only fixed to the opening flange 32 at the upper end, the sealing sleeve 40 can be slightly stretched and squeezed during the insertion of the pipe connection end 52. The resistance encountered by the pipe connection end 52 during the downward movement gradually increases and is finally fixed. This fixation is different from welding and gluing. It is not limited to theory and can be described as non-absolute fixation, or "semi-floating" fixation. Based on the application purpose of the present invention, the sealing sleeve 40 finally blocks the downward movement of the pipe connection end 50 and keeps it firmly in the opening flange 32. Once the pipe connection end 52 is in place, it is not easy to pull out because the pull-out will be subject to the greater resistance provided by the sealing sleeve 40. On the other hand, during the use of the equipment, the pipe connection end 52 rarely bears the pull-out force.

[0054] [Opening flange]

[0055] like Figure 1 , 2 As shown, the opening flange 32 of the buried container 10 can be set to a substantially cylindrical structure. For example, on a glass fiber reinforced plastic container formed by a winding process, it is easy to set a straight cylindrical flange 32, so as to facilitate the installation of the pipe connection end 52.

[0056] In comparison, Figure 7 As shown, if the container is prepared by a molding process, the inner diameter of the opening flange 32 is usually set to gradually increase from top to bottom, so as to facilitate product demoulding.

[0057] [Sealing sleeve]

[0058] The upper end of the sealing sleeve 40 is provided with a clamping structure for cooperating with the opening flange 32. Figure 2 and Figure 3 In this embodiment, the fixing structure is an annular U-shaped groove arranged at the upper end of the sealing sleeve, which is formed integrally with the sealing sleeve 40.

[0059] The annular U-shaped groove is an annular groove arranged in an outward manner from the upper end of the sealing sleeve 40. This configuration is preferably provided in an integral manner when the sealing sleeve 40 is molded. Figure 2 As shown, the annular U-shaped groove is configured to cooperate with the upper end of the opening flange 32, so as to facilitate the installation and fixing of the sealing sleeve 40 on the upper end of the opening flange 32, and to ensure that the sealing sleeve 40 is in place in the subsequent pipeline insertion step and will not fall out from the upper end of the opening flange 32. The width of the U-shaped groove is close to the thickness of the opening flange 32, and the depth of the U-shaped groove can be appropriately set according to the application. If the depth is too shallow, it is easy to fall out, and if the depth is too deep, it will increase the cost.

[0060] An implementation example of the U-shaped groove setting of the sealing sleeve 40 is provided: the U-shaped groove depth is 7 mm, the sealing sleeve wall thickness is 3 mm, and the U-shaped groove width is 6 mm.

[0061] Example 1

[0062] See also Figure 1 , wherein a circumferential rib 44 is formed around the outer wall of the sleeve body 41, and the circumferential rib 44 may be one or more. The circumferential rib 44 provides a sealing effect between the outer side of the sleeve body and the inner wall of the opening flange 32. In addition, the circumferential rib provides appropriate resistance, so that the front end of the pipe connection end 52 squeezes the circumferential rib and continues to be installed in place beyond the circumferential rib.

[0063] Preferably, there are two or more circumferential ribs 44. More preferably, there are two or three circumferential ribs 44.

[0064] exist Figure 2 In the embodiment 1 shown, the circumferential rib 44 is provided with two, which is a first circumferential rib 45 near the upper end, and a second circumferential rib 46 near the lower end. The circumferential ribs are arranged at intervals to uniformly provide elastic support force. The circumferential ribs can have a variety of cross-sectional configurations, such as square, triangle, etc., preferably semicircular. The height of the circumferential rib refers to the height of the circumferential rib protruding from the surface of the sleeve body. As the height of the circumferential rib increases, the pressure and resistance applied to the outer wall of the pipeline increase. By adjusting the height and spacing of the circumferential ribs, a suitable sealing and blocking effect of the pipeline is provided.

[0065] In addition, at the lower end 43 of the sealing sleeve or its adjacent area, a bottom flange 48 is formed around the outer side of the sealing sleeve 40. The bottom flange 48 is similar to the circumferential rib 44, which provides elastic support and resistance, but the difference is that the bottom flange 48 is thicker or larger, which prevents the front end of the pipe connection end 52 from passing through, and acts as a blocking block.

[0066] Example 2

[0067] like Figure 3 As shown, Embodiment 2 provides a sealing sleeve 40 of another construction mode, and its construction, installation and application are similar to those of Embodiment 1. The difference is that the wall thickness of the sleeve body 41 of Embodiment 2 gradually increases from the upper end to the lower end, and / or the inner diameter gradually decreases from the top to the bottom, so that there is no need to separately set the sealing rib and the bottom flange as in Embodiment 1, but the installation resistance change and the assembly clearance compensation are provided by means of the change of the wall thickness of the sleeve body 41.

[0068] Sealing sleeve variation example

[0069] The design of the sealing sleeve can be more varied. For example, there can be other forms of fastening structures, see Figure 6 In this embodiment, the clamping structure can be an annular belt provided at the upper end of the sealing sleeve 40, which can be bonded and fixed to the upper end of the opening flange 32. There can be many other variations, for example, the clamping structure is a plurality of U-shaped claws, which are clamped to the upper end of the sealing sleeve 40. In addition, the cylindrical body can be elastically turned outward and fixed on the upper end of the opening flange 32, and a proper amount of glue can be applied to assist in fixing.

[0070] For the sleeve body 41 (i.e. the main body of the sleeve, which is roughly cylindrical or conical), as long as it can provide appropriate friction, elastic deformation ability, compensate for installation clearance, and provide sealing and fixing functions, more changes can be made for specific applications, and different configurations can be designed in conjunction with the choice of elastomer materials.

[0071] [Underground container]

[0072] The present invention is particularly suitable for the interface processing of buried containers, see Figure 1 This type of buried container is typically formed by assembling plastic / composite components 21. In order to avoid stress concentration at the top interface of the container, a bonding process using adhesive is generally used. In practice, defects in the bonding process have been found. In particular, for molded glass fiber reinforced plastic components, the channel in the flange of the opening portion usually has a certain demoulding taper. It is difficult to compensate for this gap change using only adhesives, and effective sealing and fixing cannot be achieved, which has become a difficult problem in the field.

[0073] Example 3

[0074] Embodiment 3 of the present invention provides a molded glass fiber reinforced plastic container, which is applied to an underground septic tank. The composite material component 21 is a glass fiber reinforced plastic prepared by a molding process, and the thickness of the body, that is, the thickness of the glass fiber reinforced plastic shell is 3mm-10mm, preferably 6-8mm.

[0075] In areas with warm climates, such containers are buried shallower underground, the vertical distance of the feed pipe is shorter, and the vertical stress applied to the feed port is smaller. The situation of the discharge port is similar. Near the Beijing area, the upper mouth of the container is often 80cm to 1 meter from the ground, and the Northeast region is usually buried 2m underground. Taking the burial operation of fiberglass reinforced plastic septic tanks in the Northeast as an example, the upper mouth of the septic tank is at least 1.8m from the ground, and the bottom of the septic tank container is nearly 3m from the ground. The landfill depth is for anti-freeze considerations. Burying it under the frozen soil layer can prevent the contents of the container from freezing in winter.

[0076] [Part size matching example]

[0077] The upper opening of the buried septic tank is typically provided with two sizes of openings, namely a large opening and a small opening, corresponding to commercially available PVC pipes. In the application of this embodiment, two pipes are provided: a thick pipe with an outer diameter of 250 mm and an inner diameter of 238 mm; a thin pipe with an outer diameter of 110 mm and an inner diameter of 104 mm.

[0078] For ease of understanding, example data of dimensions matching between components are provided for reference.

[0079] Table 1 Shell settings with different opening sizes and flange tapers to match the size of the pipe:

[0080]

[0081] An implementation method for setting a U-shaped groove of a sealing sleeve 40 is provided: the U-shaped groove depth is 7 mm, the sealing sleeve wall thickness is 3 mm, and the U-shaped groove width is 6 mm.

[0082] [Hydraulic pressure test of the sealing sleeve connecting pipeline of the present invention]

[0083] Table 2: Sealing water pressure test conditions: The water filling height in the pipe is 2.2 meters higher than the pipe mouth surface. The selected sealing materials are No.1, No.2, and No.3, a total of 3 groups, each group has 3 samples, and the hardness of the rubber in the three groups increases successively.

[0084]

[0085] Through the above experiments, it is proved that all the three groups of samples of the present invention can achieve the expected sealing connection effect between the container and the pipeline. In this embodiment, the rubber material of group No. 2 is preferred. The configuration of the sealing sleeve is optimized in specific applications.

[0086] [Preferred Elastomer Materials in the Embodiments]

[0087] Table 3. Elastomer material can be rubber material, preferably rubber material properties

[0088]

[0089] The elastomeric material may also be other conventional polymer materials, as long as it can meet the sealing performance under specific application conditions. Depending on the specific application, the chemical stability between it and the contact medium should also be considered. For example, the elastomeric material may include any one or more of the following types: polyamide, such as nylon 66, semi-aromatic nylon, etc.; polyurethane, such as polyester polyurethane, hot melt polyurethane, polyurethane composite material, etc.; polyolefins and polyolefin derivatives, such as polypropylene, polyethylene, natural rubber, butadiene rubber, nitrile rubber, etc.; thermoplastic vulcanizate; fluororubber, such as perfluoroether rubber, fluorosilicone rubber, parafluoroether rubber, etc.; acrylate rubber, such as ethylene acrylate rubber, epoxy acrylate rubber, etc.; epoxy resin, such as solid epoxy resin, liquid curable epoxy resin, etc.; phenolic resin.

[0090] From the perspective of cost performance, the present invention preferably uses ethylene propylene rubber (EPDM). EPDM lacks polarity and has a low degree of unsaturation, so it has good resistance to various polar chemicals such as alcohols, acids, alkalis, oxidants, refrigerants, detergents, animal and vegetable oils, ketones and fats, and is suitable for use in septic tanks and sewage treatment plants. It can be used for a long time under weak alkaline conditions with stable performance.

[0091] The present invention at least includes the following concepts:

[0092] Concept 1

[0093] A buried container 10, comprising: a shell body 20, at least a portion of which is formed by a plastic / composite material component 21; a receiving space 22 surrounded by the shell body 20; an opening portion 30 provided on the plastic / composite material component 21, the opening portion 30 comprising a through hole 31 and an opening portion flange 32, the opening portion flange 32 being formed around the through hole 31 and protruding toward the outside of the buried container 10; and a pipe 50 connected to the opening portion 30.

[0094] The opening 30 is provided with a sealing sleeve 40 made of an elastomeric material. The sealing sleeve 40 includes a sleeve body 41. The upper end 42 of the sealing sleeve 40 is fixed to the upper end of the opening flange 32. The lower end 43 of the sealing sleeve 40 is placed on the inner side of the opening flange 32.

[0095] The pipe 50 includes a pipe connection end 52 which is accommodated in the sleeve body 41 . The outer wall of the pipe connection end 52 is adjacent to the inner side of the sealing sleeve 40 , so that the opening 30 and the pipe connection end 52 are sealed and connected via the sealing sleeve 40 .

[0096] Concept 2

[0097] According to the underground container 10 of Concept 1, the opening flange 32 is provided in a substantially cylindrical structure.

[0098] Concept 3

[0099] According to the underground container 10 of Concept 1, the inner diameter of the opening flange 32 gradually increases from top to bottom.

[0100] Concept 4

[0101] According to the buried container of any one of concepts 1 to 3, the upper end 42 of the sealing sleeve is provided with a clamping structure that cooperates with the flange 32 of the opening.

[0102] Concept 5

[0103] According to the buried container of concept 4, the fixing structure is an annular U-shaped groove at the upper end of the sealing sleeve, which is formed integrally with the sealing sleeve.

[0104] Concept 6

[0105] The underground container according to any one of Concepts 1 to 5, wherein a circumferential rib 44 is formed around the outer wall of the sleeve body 41 .

[0106] Concept 7

[0107] According to the underground container of Concept 6, there are two or more circumferential ribs 44.

[0108] Concept 8

[0109] According to the buried container of concept 6 or 7, a bottom flange 48 is formed around the outer side of the sealing sleeve 40 at the lower end 43 of the sealing sleeve or the vicinity thereof.

[0110] Concept 9

[0111] According to the underground container of Concept 1 or 2, the wall thickness of the sleeve body 41 gradually increases from the upper end to the lower end.

[0112] Concept 10

[0113] The underground container according to any one of Concepts 1 to 9, wherein the plastic / composite material component 21 is a glass fiber reinforced plastic component.

[0114] Concept 11

[0115] According to the underground container of Concept 10, the thickness of the body of the plastic / composite material member 21 is 3 mm-10 mm.

[0116] Concept 12

[0117] According to the underground container of Concept 10, the thickness of the body of the plastic / composite member 21 is 6-8 mm.

[0118] Concept 13

[0119] The buried container according to any one of concepts 10 to 12 is used in sewage treatment plants and septic tanks.

[0120] Concept 14

[0121] A sealing connection device for a container and a pipeline includes a sealing sleeve 40, wherein the sealing sleeve 40 is made of an elastomeric material and includes a sleeve body 41.

[0122] The container includes: a shell body 20, at least a portion of which is formed by a plastic / composite material component 21; an opening portion 30 provided on the plastic / composite material component 21, the opening portion 30 including a through hole 31 and an opening portion flange 32, the opening portion flange 32 is formed around the through hole 31 and protrudes toward the outside of the container 10,

[0123] The pipeline 50 includes a pipeline connection end 52, which is connected to the opening portion 30.

[0124] The sealing sleeve 40 is installed in the opening 30, the upper end 42 of the sealing sleeve 40 is fixed to the upper end of the opening flange 32, and the lower end 43 of the sealing sleeve 40 is placed on the inner side of the opening flange 32, and

[0125] The pipe connection end 52 is accommodated in the sleeve body 41 , and the outer wall of the pipe connection end 52 is adjacent to the inner side of the opening flange 32 via the sealing sleeve 40 , so that the opening 30 and the pipe connection end 52 are sealed and connected via the sealing sleeve 40 .

[0126] Concept 15

[0127] According to the sealed connection device of concept 14, the opening portion 30 and the pipe connection end 52 are connected in an elastic and sealed manner via the sealing sleeve 40.

[0128] Concept 16

[0129] According to the sealed connection device of concept 14 or 15, the opening flange 32 is provided in a cylindrical structure.

[0130] Concept 17

[0131] According to the sealing connection device of concept 14 or 15, the inner diameter of the opening flange 32 gradually increases from top to bottom.

[0132] Concept 18

[0133] According to the sealing connection device of concept 14 or 15, the upper end 42 of the sealing sleeve is provided with a clamping structure that cooperates with the upper end of the flange 32 of the opening portion.

[0134] Concept 19

[0135] According to the sealing connection device of concept 18, the fixing structure is an annular U-shaped groove arranged at the upper end of the sealing sleeve, which is formed integrally with the sealing sleeve.

[0136] Concept 20

[0137] According to the sealed connection device of concept 14 or 15 , a circumferential rib 44 is formed around the outer wall of the sleeve body 41 .

[0138] Concept 21

[0139] According to the sealed connection device of Concept 20, there are two or more circumferential ribs 44.

[0140] Concept 22

[0141] According to the sealed connection device of Concept 21, two circumferential ribs 44 are provided, which are a first circumferential rib 45 close to the upper end and a second circumferential rib 46 close to the lower end.

[0142] Concept 23

[0143] According to the sealed connection device of concept 21 or 22, a bottom flange 48 is formed around the outer side of the sealing sleeve 40 at the lower end 43 of the sealing sleeve or the vicinity thereof.

[0144] Concept 24

[0145] According to the sealing connection device of concept 14 or 15, the wall thickness of the sleeve body 41 gradually increases from the upper end to the lower end, or the inner diameter thereof gradually decreases from the upper end to the lower end.

[0146] Concept 25

[0147] The sealed connection device according to concept 14 or 15, wherein the plastic / composite material component 21 is a molded glass fiber reinforced plastic component.

[0148] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

[0149] List of Part Names and Reference Symbols

[0150] Ground 1

[0151] Underground container 10

[0152] Shell body 20

[0153] Plastic / composite components21

[0154] Accommodation space 22

[0155] Opening 30

[0156] Through hole 31

[0157] Opening flange 32

[0158] Flange cavity 34

[0159] Sealing sleeve 40

[0160] Sleeve body 41

[0161] Sealing sleeve upper end 42

[0162] The lower end 43 of the sealing sleeve

[0163] Circumferential rib 44

[0164] The first circumferential rib 45

[0165] Second circumferential rib 46

[0166] Bottom flange 48

[0167] Pipeline 50

[0168] Pipe connection end 52

Claims

1. An underground container (10), comprising: A shell body (20), at least a portion of which is formed by a plastic / composite material component (21); a receiving space (22) formed by the shell body (20); an opening (30) provided on the plastic / composite material component (21), the opening (30) comprising a through hole (31) and an opening flange (32), the opening flange (32) being formed around the through hole (31) and protruding toward the outside of the buried container (10); and a pipe (50) connected to the opening (30), A sealing sleeve (40) made of an elastomeric material is arranged in the opening portion (30), the sealing sleeve (40) comprises a sleeve body (41), an upper end (42) of the sealing sleeve (40) is fixed to the upper end of the opening portion flange (32), and a lower end (43) of the sealing sleeve (40) is placed on the inner side of the opening portion flange (32). The pipeline (50) comprises a pipeline connection end (52), the pipeline connection end (52) is accommodated in the sleeve body (41), and the outer wall of the pipeline connection end (52) is adjacent to the inner side of the sealing sleeve (40), so that the opening (30) and the pipeline connection end (52) are sealed and connected via the sealing sleeve (40). wherein only the upper end (42) of the sealing sleeve (40) is fixed to the opening flange (32); and A circumferential rib (44) is formed around the outer wall of the sleeve body (41), and the cross-sectional configuration of the circumferential rib (44) is square, triangular or semicircular.

2. The underground container (10) according to claim 1, wherein the opening flange (32) is configured to be a substantially cylindrical structure.

3. The underground container (10) according to claim 1, wherein: The inner diameter of the opening flange (32) gradually increases from top to bottom.

4. The buried container according to any one of claims 1 to 3, wherein the upper end (42) of the sealing sleeve is provided with a fixing structure that cooperates with the flange (32) of the opening.

5. The underground container according to claim 4, wherein the fixing structure is an annular U-shaped groove at the upper end of the sealing sleeve, which is formed integrally with the sealing sleeve.

6. The underground container according to claim 1, wherein the number of the circumferential ribs (44) is two or more.

7. The underground container according to claim 6, wherein a bottom flange (48) is formed around the outer side of the sealing sleeve (40) at the lower end (43) of the sealing sleeve or at the vicinity thereof.

8. The underground container according to claim 1 or 2, wherein the wall thickness of the sleeve body (41) gradually increases from the upper end to the lower end.

9. The underground container according to claim 1 or 2, wherein the plastic / composite material component (21) is a glass fiber reinforced plastic component.

10. The underground container according to claim 9, wherein the thickness of the body of the plastic / composite material component (21) is 3 mm-10 mm.

11. The underground container according to claim 9, wherein the thickness of the body of the plastic / composite material component (21) is 6-8 mm.

12. The buried container according to claim 9 is used in sewage treatment plants and septic tanks.

13. A sealed connection device for a container and a pipeline, comprising a sealing sleeve (40), wherein: The sealing sleeve (40) is made of an elastomeric material and comprises a sleeve body (41). The container comprises: a shell body (20), at least a portion of which is formed by a plastic / composite material component (21); an opening portion (30) provided on the plastic / composite material component (21), the opening portion (30) comprising a through hole (31) and an opening portion flange (32), the opening portion flange (32) being formed around the through hole (31) and protruding toward the outside of the container (10), The pipeline (50) includes a pipeline connection end (52) connected to the opening (30). The sealing sleeve (40) is installed in the opening (30), the upper end (42) of the sealing sleeve (40) is fixed to the upper end of the opening flange (32), and the lower end (43) of the sealing sleeve (40) is placed on the inner side of the opening flange (32). The pipe connection end (52) is accommodated in the sleeve body (41), and the outer wall of the pipe connection end (52) is adjacent to the inner side of the opening flange (32) via the sealing sleeve (40), so that the opening (30) and the pipe connection end (52) are sealed and connected via the sealing sleeve (40). wherein only the upper end (42) of the sealing sleeve (40) is fixed to the opening flange (32); and A circumferential rib (44) is formed around the outer wall of the sleeve body (41), and the cross-sectional configuration of the circumferential rib (44) is square, triangular or semicircular.

14. The sealed connection device according to claim 13, wherein: The opening portion (30) and the pipe connection end (52) are connected in an elastic sealing manner via a sealing sleeve (40).

15. The sealed connection device according to claim 13 or 14, wherein the opening flange (32) is provided in a cylindrical structure.

16. The sealed connection device according to claim 13 or 14, wherein: The inner diameter of the opening flange (32) gradually increases from top to bottom.

17. The sealing connection device according to claim 13 or 14, wherein the upper end (42) of the sealing sleeve is provided with a clamping structure that cooperates with the upper end of the opening flange (32).

18. The sealing connection device according to claim 17, wherein the fixing structure is an annular U-shaped groove arranged at the upper end of the sealing sleeve, which is formed integrally with the sealing sleeve.

19. The sealing connection device according to claim 13, wherein the number of the circumferential ribs (44) is two or more.

20. The sealing connection device according to claim 19, wherein the circumferential rib (44) is provided in two, which is a first circumferential rib (45) close to the upper end, and a second circumferential rib (46) close to the lower end.

21. The sealing connection device according to claim 20, wherein a bottom flange (48) is formed around the outer side of the sealing sleeve (40) at the lower end (43) of the sealing sleeve or at a region adjacent thereto.

22. The sealing connection device according to claim 13 or 14, wherein the wall thickness of the sleeve body (41) gradually increases from the upper end to the lower end, or the inner diameter thereof gradually decreases from the upper end to the lower end.

23. The sealed connection device according to claim 13 or 14, wherein the plastic / composite material component (21) is a compression molded glass fiber reinforced plastic component.

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