Anti-rust treatment device for nodular cast iron well lid

Abstract

The utility model provides a nodular cast iron well lid rust-proof treatment device, which relates to the well lid rust-proof technical field and comprises a fixing ring, a limiting ring is fixed at the top of the fixing ring, a well lid body is arranged between the inner walls of the limiting ring, and an annular cavity is arranged in the well lid body close to the edge of the outer surface. According to the well lid, the annular cavity penetrating to the bottom is formed in the well lid body, the zinc ring is arranged in the annular cavity, then the multiple copper metal patches are attached to the outer surface of the well lid body, the copper metal patches and the zinc ring are connected through the wires, and therefore the well lid can be conveniently assembled and disassembled. Electrochemical corrosion can be generated when the bottom of the well lid body is in a humid state, at the moment, generated electrochemical corrosion electrons are transmitted to the zinc ring through the copper metal patch and the wire, and due to the fact that the metal activity of zinc is larger than that of iron and copper, the zinc can be corroded preferentially when an ironwork is corroded, and therefore the ironwork is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of rust prevention of manhole covers, in particular to a rust prevention treatment device for ductile iron manhole covers. Background Art

[0002] Ductile iron manhole cover is a kind of ductile iron product. Ductile iron is obtained by spheroidizing and inoculating to obtain spheroidal graphite, which effectively improves the mechanical properties of cast iron, especially the plasticity and toughness, thereby obtaining a higher strength than carbon steel. Ductile iron is a high-strength cast iron material with comprehensive properties close to those of steel. Based on its excellent performance, it has been successfully used to cast some parts with complex force and high requirements for strength, toughness and wear resistance.

[0003] Currently, the existing ductile iron manhole covers are mostly used for the protection of sewer outlets during installation, which results in the ductile iron manhole covers often being in a humid environment. In a humid environment, the connection parts are prone to rust, making it difficult to open the ductile iron manhole covers at the sewer outlets later. Utility Model Content

[0004] In order to solve the existing technical problems, the utility model provides a rust-proof treatment device for a ductile iron manhole cover.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0006] A rust prevention device for a ductile iron manhole cover comprises a fixing ring, a limiting ring is fixed on the top of the fixing ring, a manhole cover body is arranged between the inner walls of the limiting ring, an annular cavity is opened inside the manhole cover body near the edge of the outer surface, the bottom of the annular cavity penetrates to the bottom of the manhole cover body, a zinc ring is arranged inside the annular cavity, a plurality of copper metal patches are equidistantly attached to the outer surface of the manhole cover body near the ID edge along the circumferential direction, a wire is fixed on one side of each of the copper metal patches, one end of each of the wires penetrates into the interior of the annular cavity and is fixed on the zinc ring.

[0007] Optionally, the outer surface of the limiting ring is connected to a plurality of constraint frames at equal intervals along the circumferential direction, and the top of the fixing ring is located inside the plurality of constraint frames and a positioning column is fixed thereon.

[0008] Optionally, a plurality of protrusions are equidistantly arranged on the outer surface of the manhole cover body along the circumferential direction, and a plurality of the positioning posts are correspondingly penetrated to the top of the protrusions.

[0009] Optionally, a support ring is fixed to the inner side of the fixing ring, and the top of the support ring is in contact with the bottom of the manhole cover body.

[0010] Optionally, sealing rings are fixed to the inner walls on both sides of the annular cavity, and a rubber ring is arranged between the inner walls of the annular cavity at the bottom edge.

[0011] Optionally, annular openings are provided on the outer surfaces of both sides of the rubber ring, and the two sealing rings are correspondingly engaged inside the annular openings. The bottom of the rubber ring is in an arc shape, and the bottom of the arc extends to the bottom of the manhole cover body.

[0012] Optionally, an annular sealing groove is formed at the top and bottom of the two sealing rings, and an annular sealing ring which is engaged in the annular sealing groove is fixed to the inner top surface and bottom surface of the two annular openings.

[0013] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art. Of course, any product implementing the utility model does not necessarily need to achieve all the advantages described below at the same time:

[0014] 1. In the utility model, an annular cavity is opened inside the manhole cover body and penetrates to the bottom, and a zinc ring is arranged inside the annular cavity. Then, a plurality of copper metal patches are attached to the outer surface of the manhole cover body, and the copper metal patches and the zinc ring are connected by wires. When the bottom of the manhole cover body is in a wet state, electrochemical corrosion will occur. At this time, the electrochemical corrosion electrons generated will be transferred to the zinc ring through the copper metal patches and the wires. Since the metal activity of zinc is greater than that of iron and copper, zinc will be corroded first when corrosion occurs on iron products, thereby protecting the iron products.

[0015] 2. In the utility model, when installing the zinc ring, the opening of the annular cavity can be sealed by clamping the rubber ring inside the annular cavity, and at the same time, the annular opening on the rubber ring is clamped on the sealing ring, so that the annular sealing ring is sealed and connected with the annular sealing groove, thereby improving its sealing performance, and the bottom of the rubber ring is set to an arc surface shape, extending to the bottom of the manhole cover body. When the manhole cover body contacts the support ring, the arc surface of the bottom of the rubber ring will be pressed against the inside of the annular opening, thereby improving its sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0017] Figure 1 The utility model provides a schematic top view of a 3D structural diagram of a ductile iron manhole cover anti-rust treatment device;

[0018] Figure 2 The utility model provides a schematic diagram of a bottom-up stereoscopic structure of a ductile iron manhole cover anti-rust treatment device;

[0019] Figure 3 The utility model provides a cross-sectional three-dimensional structural schematic diagram of a ductile iron manhole cover anti-rust treatment device;

[0020] Figure 4 For this utility model Figure 3 Magnified view at A in the middle.

[0021] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0022] 1. Fixing ring; 2. Limiting ring; 3. Positioning column; 4. Constraint frame; 5. Manhole cover body; 6. Protrusion; 7. Support ring; 8. Copper metal patch; 9. Annular cavity; 10. Zinc ring; 11. Sealing ring; 12. Rubber ring; 13. Annular mouth; 14. Annular sealing groove; 15. Annular sealing ring; 16. Wire.

[0023] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0024] The utility model will now be further described in detail with reference to the accompanying drawings.

[0025] Embodiment 1, as Figure 1-4 As shown, the utility model provides a technical solution for a rust-proof treatment device for a ductile iron manhole cover: it includes a fixing ring 1, a limiting ring 2 is fixed on the top of the fixing ring 1, a manhole cover body 5 is arranged between the inner walls of the limiting ring 2, an annular cavity 9 is opened inside the manhole cover body 5 near the edge of the outer surface, the bottom of the annular cavity 9 penetrates to the bottom of the manhole cover body 5, a zinc ring 10 is arranged inside the annular cavity 9, a plurality of copper metal patches 8 are equidistantly attached to the outer surface of the manhole cover body 5 near the ID edge along the circumferential direction, a wire 16 is fixed on one side of the plurality of copper metal patches 8, one end of the plurality of wires 16 penetrates into the inside of the annular cavity 9 and is fixed on the zinc ring 10.

[0026] The effect achieved by the entire embodiment 1 is that when the device is used, an annular cavity 9 is opened inside the manhole cover body 5 and penetrates to the bottom, and a zinc ring 10 is arranged inside the annular cavity 9, and then a plurality of copper metal patches 8 are attached to the outer surface of the manhole cover body 5, and the copper metal patches 8 and the zinc ring 10 are connected by a wire 16. When the bottom of the manhole cover body 5 is in a wet state, electrochemical corrosion will occur. At this time, the generated electrochemical corrosion electrons are transferred to the zinc ring 10 through the copper metal patches 8 and the wire 16. Since the metal activity of zinc is greater than that of iron and copper, zinc will be corroded first when corrosion occurs on iron products, thereby protecting the iron products.

[0027] Embodiment 2, as Figure 1-4As shown, the outer surface of the limit ring 2 is connected with multiple constraint frames 4 at equal intervals along the circumferential direction, the top of the fixing ring 1 is located on the inner side of the multiple constraint frames 4 and is fixed with positioning columns 3, the outer surface of the manhole cover body 5 is provided with multiple protrusions 6 at equal intervals along the circumferential direction, and the multiple positioning columns 3 are correspondingly penetrated to the top of the protrusion 6, the inner side of the fixing ring 1 is fixed with a support ring 7, the top of the support ring 7 and the bottom of the manhole cover body 5 are fitted with each other, sealing rings 11 are fixed to the inner walls of the annular cavity 9 on both sides, and a rubber ring 12 is provided between the inner walls of the annular cavity 9 at the bottom edge, and annular openings 13 are provided on the outer surfaces of both sides of the rubber ring 12, and the two sealing rings 11 are correspondingly engaged in the inside of the annular openings 13, the bottom of the rubber ring 12 is in the shape of an arc surface, and the bottom of the arc surface extends to the bottom of the manhole cover body 5, and the top and bottom of the two sealing rings 11 are provided with annular sealing grooves 14, and the inner top and bottom surfaces of the two annular openings 13 are fixed with annular sealing rings 15 engaged in the inside of the annular sealing grooves 14.

[0028] The effect achieved by the entire embodiment 2 is that when the zinc ring 10 is installed, the opening of the annular cavity 9 can be sealed by engaging the rubber ring 12 inside the annular cavity 9, and at the same time, the annular opening 13 on the rubber ring 12 is engaged with the sealing ring 11, so that the annular sealing ring 15 is sealed and connected with the annular sealing groove 14, thereby improving its sealing performance, and the bottom of the rubber ring 12 is set to an arc surface shape, extending to the bottom of the manhole cover body 5. When the manhole cover body 5 contacts the support ring 7, the arc surface at the bottom of the rubber ring 12 will be pressed against the inside of the annular opening 13, thereby improving its sealing performance.

[0029] Working principle: When using this device, an annular cavity 9 is opened inside the manhole cover body 5 and penetrates to the bottom, and a zinc ring 10 is set inside the annular cavity 9, and then a plurality of copper metal patches 8 are attached to the outer surface of the manhole cover body 5, and the copper metal patches 8 and the zinc ring 10 are connected by a wire 16. When the bottom of the manhole cover body 5 is in a wet state, electrochemical corrosion will occur. At this time, the electrochemical corrosion electrons generated will be transferred to the zinc ring 10 through the copper metal patches 8 and the wire 16. Since the metal activity of zinc is greater than that of iron and copper, zinc will be corroded first when corrosion occurs on iron products. In order to protect the iron products, when the zinc ring 10 is installed, the opening of the annular cavity 9 can be sealed by engaging the rubber ring 12 inside the annular cavity 9, and at the same time, the annular opening 13 on the rubber ring 12 is engaged with the sealing ring 11, so that the annular sealing ring 15 is sealed and connected with the annular sealing groove 14, thereby improving its sealing performance, and the bottom of the rubber ring 12 is set to an arc surface shape, extending to the bottom of the manhole cover body 5. When the manhole cover body 5 contacts the support ring 7, the arc surface at the bottom of the rubber ring 12 will be pressed against the inside of the annular opening 13, thereby improving its sealing performance.

[0030] The present invention is not limited to the above-mentioned implementation modes. Anyone should be aware of the structural changes made under the inspiration of the present invention. Any technical solution that is the same or similar to the present invention falls within the protection scope of the present invention. The technology, shape, and structure that are not described in detail in the present invention are all known technologies.

Claims

1. A rust-proof treatment device for a ductile iron manhole cover, comprising a fixing ring (1), characterized in that: A limiting ring (2) is fixed on the top of the fixing ring (1), a manhole cover body (5) is arranged between the inner walls of the limiting ring (2), an annular cavity (9) is opened inside the manhole cover body (5) near the edge of the outer surface, the bottom of the annular cavity (9) penetrates to the bottom of the manhole cover body (5), a zinc ring (10) is arranged inside the annular cavity (9), a plurality of copper metal patches (8) are equidistantly attached to the outer surface of the manhole cover body (5) near the ID edge along the circumferential direction, a plurality of copper metal patches (8) are fixed on one side of each of the plurality of copper metal patches (8), one end of each of the plurality of wires (16) penetrates to the inside of the annular cavity (9) and is fixed on the zinc ring (10).

2. The rust-proof treatment device for ductile iron manhole cover according to claim 1 is characterized in that: The outer surface of the limiting ring (2) is connected to a plurality of constraint frames (4) at equal intervals along the circumferential direction, and the top of the fixing ring (1) is located inside the plurality of constraint frames (4) and is fixed with positioning columns (3).

3. The rust-proof treatment device for ductile iron manhole cover according to claim 2 is characterized in that: The outer surface of the manhole cover body (5) is provided with a plurality of protrusions (6) at equal intervals along the circumferential direction, and the plurality of positioning posts (3) are correspondingly passed through to the top of the protrusions (6).

4. The rust-proof treatment device for ductile iron manhole cover according to claim 1, characterized in that: A support ring (7) is fixed on the inner side of the fixing ring (1), and the top of the support ring (7) is in contact with the bottom of the manhole cover body (5).

5. The rust-proof treatment device for ductile iron manhole cover according to claim 1, characterized in that: Sealing rings (11) are fixed to the inner walls on both sides of the annular cavity (9), and a rubber ring (12) is arranged between the inner walls of the annular cavity (9) at the bottom edge.

6. The rust-proof treatment device for ductile iron manhole cover according to claim 5, characterized in that: The outer surfaces of both sides of the rubber ring (12) are provided with annular openings (13), and the two sealing rings (11) are correspondingly engaged inside the annular openings (13). The bottom of the rubber ring (12) is in the shape of an arc surface, and the bottom of the arc surface extends to the bottom of the manhole cover body (5).

7. The rust-proof treatment device for ductile iron manhole cover according to claim 6, characterized in that: The top and bottom of the two sealing rings (11) are both provided with an annular sealing groove (14), and the inner top and bottom surfaces of the two annular openings (13) are both fixed with an annular sealing ring (15) which is engaged in the annular sealing groove (14).

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