Manhole sealing structure of storage tank

Abstract

The utility model relates to the technical field of manhole sealing, in particular to a manhole sealing structure of a storage tank, the storage tank, a manhole and a cover body, an inner thread ring is arranged on the inner wall of the manhole on the storage tank, buckles are symmetrically arranged on the outer side of a lower flange of the manhole through a shaft body, and an annular protruding block is arranged on the top end face of an upper flange of the cover body. A rubber gasket is arranged in an annular groove in the side, opposite to the upper flange, of the lower flange, an outer ring sealing groove is formed in the lower portion of the cover body, an inner ring sealing groove is formed in the inner threaded ring, an inner embedded ring is arranged on the lower portion of the cover body, and an outer embedded ring is arranged on the manhole. According to the utility model, the upper flange and the lower flange are in primary sealing connection by designing the embedded step and the opening part of the inner shrinkage ring which are embedded with each other, and are matched with the external embedded ring and the outer ring sealing groove which are matched with each other, and the internal embedded ring and the inner ring sealing groove which are matched with each other, so that a secondary sealing effect is achieved; in addition, the cover body is in threaded connection with the inner threaded ring in the manhole and is matched with the buckles to be buckled with the annular protruding blocks, disassembly and assembly are easy, and the sealing effect is improved to a certain degree.

Description

Technical Field

[0001] The utility model relates to the technical field of manhole sealing, in particular to a manhole sealing structure of a storage tank. Background Art

[0002] The manhole sealing structure of a storage tank is mainly used to ensure that the tank body can maintain good sealing during maintenance, installation or cleaning to prevent leakage of the tank contents. However, the current manhole sealing structure of a storage tank is generally only implemented by a single sealing ring. The sealing ring is prone to aging after long-term use, resulting in a decrease in sealing performance. In addition, the sealing structure is single and the sealing effect is unsatisfactory. In view of this, it is necessary to improve the current manhole sealing to solve the above problems.

[0003] The above information disclosed in this Background section is only for understanding the background of the present inventive concept and therefore it may contain information that does not constitute prior art. Utility Model Content

[0004] The purpose of the utility model is to provide a manhole sealing structure for a storage tank to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A manhole sealing structure for a storage tank comprises a storage tank, a manhole, and a cover. A bracket is provided on the bottom end surface of the storage tank, a feed port and a discharge port are provided on one side of the storage tank, a manhole is provided in the middle of the top end surface of the storage tank, an inner thread ring is provided on the inner wall of the manhole, a lower flange is provided at the open end of the manhole, and buckles are symmetrically provided on the outer side of the lower flange through an axis.

[0007] The outer side of the cover body is provided with an upper flange, the top surface of the upper flange is provided with an annular protrusion, and the buckle is buckled and connected with the annular protrusion;

[0008] A circular groove is formed on one side of the lower flange opposite to the upper flange, and a rubber gasket is provided in the circular groove;

[0009] The bottom end surface of the cover body is provided with an outer ring sealing groove, the top end surface of the internal thread ring is provided with an inner ring sealing groove, one side of the outer ring sealing groove of the bottom end surface of the cover body is provided with an inner fitting ring, and the top end surface of the manhole is provided with an outer fitting ring;

[0010] In addition, the preferred structure is that the top end surface of the cover body is provided with a first recessed portion, and the bottom end surface of the cover body is provided with a second recessed portion, wherein the top end surface of the first recessed portion is provided with a handle, the outer side of the second recessed portion is provided with an external threaded portion, and the cover body is threadedly connected between the external threaded portion and the internal thread ring.

[0011] In addition, a preferred structure is that an embedded step is provided on one side of the annular groove of the lower flange, the outer wall of the upper flange is provided as an inner shrinkage ring opening, and the inner shrinkage ring opening and the embedded step are interlocked.

[0012] In addition, a preferred structure is that the outer fitting ring and the outer ring sealing groove are adapted to each other, and the inner fitting ring and the inner ring sealing groove are adapted to each other.

[0013] In addition, a preferred structure is that the inner walls of the outer ring sealing groove and the inner ring sealing groove are both provided with rubber layers, and the rubber layers are closely fitted to the outer walls of the outer fitting ring and the inner fitting ring respectively.

[0014] The beneficial effects of the utility model are:

[0015] In the utility model, firstly, on the basis of designing a conventional rubber gasket, the upper flange and the lower flange are sealed for the first time by designing mutually embedded steps and inner shrinkage ring mouths, and the mutually adapted external embedding ring and outer ring sealing groove, internal embedding ring and inner ring sealing groove are matched to achieve the effect of secondary sealing. At the same time, the cover body is threadedly connected to the internal threaded ring in the manhole, and is buckled with the annular protrusion, so that the operator is easy to disassemble and assemble the cover body, and the sealing effect of the sealing structure is improved to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a manhole sealing structure for a storage tank proposed by the utility model;

[0017] Figure 2 This is a structural schematic diagram of a manhole and a cover in a manhole sealing structure for a storage tank proposed by the present invention;

[0018] Figure 3 This is a structural schematic diagram of a manhole sealing structure for a storage tank proposed by the present invention, showing a manhole and a cover;

[0019] Figure 4 This is a three-dimensional diagram of the cover body in the manhole sealing structure of a storage tank proposed by the utility model.

[0020] In the figure: 1 storage tank, 2 bracket, 31 feed port, 32 discharge port, 4 manhole, 5 cover body, 51 first inner recess, 52 second inner recess, 53 handle, 54 external threaded portion, 61 lower flange, 611 embedded step, 62 upper flange, 621 inner shrink ring mouth, 7 shaft body, 8 buckle, 9 annular protrusion, 10 internal thread ring, 111 outer ring sealing groove, 112 inner ring sealing groove, 121 external fitting ring, 122 internal fitting ring, 13 rubber layer, 14 annular groove, 15 rubber gasket. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0024] Reference Figure 1-4 A manhole sealing structure for a storage tank includes a storage tank 1, a manhole 4, and a cover 5. A bracket 2 is provided on the bottom end surface of the storage tank 1. A feed port 31 and a discharge port 32 are provided on one side of the storage tank 1. A manhole 4 is provided in the middle of the top surface of the storage tank 1. An inner thread ring 10 is provided on the inner wall of the manhole 4. A lower flange 61 is provided at the open end of the manhole 4, and buckles 8 are symmetrically provided on the outer side of the lower flange 61 through an axis 7.

[0025] An upper flange 62 is provided on the outer side of the cover body 5, and an annular protrusion 9 is provided on the top surface of the upper flange 62, and a buckle 8 is buckled and connected with the annular protrusion 9;

[0026] In other embodiments, the top end surface of the cover body 5 is provided with a first inner recess 51, and the bottom end surface of the cover body 5 is provided with a second inner recess 52, wherein the top end surface of the first inner recess 51 is provided with a handle 53, and the outer side of the second inner recess 52 is provided with an external threaded portion 54, and the cover body 5 is threadedly connected to the internal thread ring 10 through the external threaded portion 54;

[0027] With this design, the conventional clamping block is designed as an annular protrusion 9. Since the cover body 5 is threadedly connected to the internal thread ring 10 provided on the inner wall of the manhole 4, when the operator screws the cover body 5 into the manhole 4, it is unnecessary to align the position of the clamping buckle 8 and the annular protrusion 9. When the cover body 5 is rotated to any position angle, the clamping buckle 8 can be buckled with the annular protrusion 9, which improves the convenience of buckling.

[0028] The first concave portion 51 and the second concave portion 52 are respectively provided on both sides of the cover 5, which can reduce the raw material used for the cover 5. At the same time, the concave design is conducive to weight reduction, which better meets the lightweight requirements of processing and production.

[0029] An annular groove 14 is formed on the opposite side of the lower flange 61 and the upper flange 62, and a rubber gasket 15 is provided in the annular groove 14;

[0030] An outer ring sealing groove 111 is formed on the bottom end surface of the cover body 5, and an inner ring sealing groove 112 is formed on the top end surface of the internal thread ring 10. An inner fitting ring 122 is provided on one side of the outer ring sealing groove 111 on the bottom end surface of the cover body 5, and an outer fitting ring 121 is provided on the top end surface of the manhole 4. The outer fitting ring 121 and the outer ring sealing groove 111 are adapted to each other, and the inner fitting ring 122 and the inner ring sealing groove 112 are adapted to each other.

[0031] In other embodiments, an embedded step 611 is provided on one side of the annular groove 14 of the lower flange 61, and an outer wall of the upper flange 62 is provided with an inner shrinking ring opening 621, and the inner shrinking ring opening 621 and the embedded step 611 are interlocked with each other;

[0032] With this design, the upper flange 62 and the lower flange 61 are assembled by designing the embedded steps 611 and the inner shrinkage ring 621 that fit into each other, so that the first sealing connection can be achieved.

[0033] In other embodiments, the inner walls of the outer ring sealing groove 111 and the inner ring sealing groove 112 are both provided with a rubber layer 13, and the rubber layer 13 is tightly fitted to the outer walls of the outer fitting ring 121 and the inner fitting ring 122 respectively;

[0034] With this design, the rubber layer 13 is respectively arranged on the inner wall of the outer ring sealing groove 111 and the inner ring sealing groove 112. When the outer fitting ring 121 and the inner fitting ring 122 are respectively embedded in the outer ring sealing groove 111 and the inner ring sealing groove 112, the rubber layer 13 can reduce the gap and improve the sealing effect.

[0035] In this embodiment, first, on the basis of designing a conventional rubber gasket, the upper flange and the lower flange are sealed for the first time by designing mutually embedded steps and inner shrinkage ring mouths, and the mutually adapted external embedding rings and outer ring sealing grooves, and the internal embedding rings and inner ring sealing grooves are used to achieve a secondary sealing effect. At the same time, the cover body is threadedly connected to the internal threaded ring in the manhole, and is fastened with a snap buckle and an annular protrusion, so that the operator can easily disassemble and assemble the cover body, and the sealing effect of the sealing structure is improved to a certain extent.

[0036] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A manhole sealing structure for a storage tank, comprising a storage tank (1), a manhole (4) and a cover (5), characterized in that: The bottom end surface of the storage tank (1) is provided with a bracket (2), and one side of the storage tank (1) is provided with a feed port (31) and a discharge port (32). A manhole (4) is provided in the middle of the top end surface of the storage tank (1), and the inner wall of the manhole (4) is provided with an inner thread ring (10). A lower flange (61) is provided at the open end of the manhole (4), and a buckle (8) is symmetrically provided on the outer side of the lower flange (61) through an axis (7). An upper flange (62) is provided on the outer side of the cover body (5), and an annular protrusion (9) is provided on the top end surface of the upper flange (62), and the buckle (8) is snap-fitted with the annular protrusion (9), and an annular groove (14) is provided on the side opposite to the lower flange (61) and the upper flange (62), and a rubber gasket (15) is provided in the annular groove (14), the bottom end surface of the cover body (5) is provided with an outer ring sealing groove (111), the top end surface of the internal thread ring (10) is provided with an inner ring sealing groove (112), an inner chimeric ring (122) is provided on one side of the outer ring sealing groove (111) of the bottom end surface of the cover body (5), and an outer chimeric ring (121) is provided on the top end surface of the manhole (4).

2. The manhole sealing structure of a storage tank according to claim 1, characterized in that: The top end surface of the cover body (5) is provided with a first inner recess (51), and the bottom end surface of the cover body (5) is provided with a second inner recess (52), wherein the top end surface of the first inner recess (51) is provided with a handle (53), and the outer side of the second inner recess (52) is provided with an external threaded portion (54), and the cover body (5) is threadedly connected to the internal thread ring (10) through the external threaded portion (54).

3. The manhole sealing structure of a storage tank according to claim 1, characterized in that: An embedded step (611) is provided on one side of the annular groove (14) of the lower flange (61), and the outer wall of the upper flange (62) is provided with an inner shrinkage ring opening (621), and the inner shrinkage ring opening (621) and the embedded step (611) are interlocked.

4. The manhole sealing structure of a storage tank according to claim 1, characterized in that: The outer interlocking ring (121) and the outer ring sealing groove (111) are adapted to each other, and the inner interlocking ring (122) and the inner ring sealing groove (112) are adapted to each other.

5. The manhole sealing structure of a storage tank according to claim 1, characterized in that: The inner walls of the outer ring sealing groove (111) and the inner ring sealing groove (112) are both provided with a rubber layer (13), and the rubber layer (13) is tightly fitted to the outer walls of the outer chimeric ring (121) and the inner chimeric ring (122), respectively.

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