Corrosion-resistant sewage pipeline inspection well

Abstract

The utility model discloses a corrosion-resistant sewage pipeline inspection well, which belongs to the technical field of inspection well maintenance and comprises an iron block placed at the bottom of a pipe body. The copper plating layers are electroplated on the inner walls of the pipe body and the well body and the outer surfaces of the well cover and the ladder stand; one end of the wire is fixedly connected with the iron block, and the other end of the wire is respectively connected with the plurality of copper plating layers. According to the utility model, the iron material is used as the anode and is coupled with copper to generate galvanic corrosion, ferrous ions can be continuously generated in situ, and the ferrous ions are combined with sulfide in water to generate ferrous sulfide (FeS) precipitate, so that hydrogen sulfide (H2S) in the pipeline can be effectively reduced, and the inspection well is prevented from being corroded. Meanwhile, cathode material copper wrapping the surfaces of the sewer well lid and the ladder stand can also prevent H2S from directly making contact with the inner wall of the pipe body, the inner wall of the well body, the well lid and the ladder stand, and parts in the inspection well are protected.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of inspection well maintenance, especially relates to a sewage pipeline inspection well of corrosion resistance. BACKGROUND

[0002] Urban drainage pipe network is extremely crucial to urban waterlogging control, wastewater collection and water environment protection. The anaerobic environment during operation of the urban drainage pipe network can produce toxic and harmful gases such as hydrogen sulfide. Hydrogen sulfide causes pipeline corrosion and odor emission, and biological sulfuric acid can corrode concrete pipelines to cause sewage leakage, pollute groundwater and soil, and increase maintenance and reconstruction costs. The discharge of hydrogen sulfide also harms the environment and human health, so hydrogen sulfide control is of great significance to urban development. Inspection wells are an important part of the drainage pipe network, and the well covers and ladders are usually made of cast iron or steel structure, which can bear well but are easily eroded by sewage, affecting the use of well covers and personnel safety, and need to be protected to prolong the service life and reduce replacement costs.

[0003] Chemical agent addition is a common method for controlling hydrogen sulfide, and iron salts (such as ferrous chloride or ferric chloride) are common chemical agents that can remove sulfides in the form of iron sulfide precipitate. However, iron salts have defects in controlling hydrogen sulfide, requiring continuous addition, high energy consumption and accelerating equipment aging. In addition, iron salts have high corrosiveness and strong acidity, which can easily cause occupational health and safety problems, and special containers are required for transportation and storage.

[0004] Inspection well covers are usually physically isolated from sewage and air, such as the waterproof net of patent CN208363137U and the polyurea coating of patent CN215483133U. The ladder is mainly made of corrosion-resistant materials. Although these corrosion protection methods are effective, they do not fully utilize the corrosion-resistant materials. Plastic inspection wells have acceptable surface hardness and tensile strength, but are not resistant to corrosion, have short service life and are not suitable for harsh environments. Therefore, the existing technology of urban drainage pipe network in the control of hydrogen sulfide and the corrosion protection of inspection well components is insufficient and needs to be improved.

[0005] Therefore, a sewage pipeline inspection well of corrosion resistance is proposed. CONTENT OF THE UTILITY MODEL

[0006] To solve the above technical problems, the utility model provides a sewage pipeline inspection well of corrosion resistance.

[0007] To achieve the above purpose, the utility model provides a sewage pipeline inspection well of corrosion resistance, which comprises a pipe body and a well body, the pipe body is connected to the well body, the top of the well body is provided with a well cover, and the inner wall of the well body is fixedly connected with a ladder, which comprises:

[0008] Iron block, the iron block is placed in the bottom of the pipe body;

[0009] A plurality of copper plating layers, the copper plating layers are electroplated on the inner walls of the pipe body and the well body and the outer surfaces of the well cover and the ladder;

[0010] a wire, one end of which is fixedly connected with the iron block and the other end of which is connected with the copper plating layer.

[0011] Preferably, the wire is a pure copper core wire wrapped with an insulating layer.

[0012] Preferably, the wire is embedded inside the well body and the pipe body.

[0013] Preferably, the copper plating layer outside the well cover is detachably connected with the wire through an interface.

[0014] Preferably, the copper plating layer on the inner wall of the pipe body, the inner wall of the well body and the outer surface of the ladder is fixedly welded with the wire.

[0015] Preferably, a hard plastic pipe is inserted on the iron block, and the wire is fixedly connected with the iron block inside the hard plastic pipe.

[0016] Compared with the prior art, the utility model has the advantages and technical effects that:

[0017] In the utility model, the iron material is used as an anode, and can be coupled with copper to cause galvanic corrosion, thereby continuously generating ferrous ions in situ, combining with sulfides in water to generate ferrous sulfide (FeS) precipitate, effectively reducing hydrogen sulfide (H2S) in the pipeline and preventing the inspection well from being corroded. Meanwhile, the copper wrapped on the sewer cover and the surface of the ladder as a cathode material can prevent H2S from directly contacting the inner wall of the pipe body, the inner wall of the well body, the well cover and the ladder, thereby protecting the internal components of the inspection well. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments illustrated in the drawings are provided to explain the present application and should not be considered as an improper limitation on the present application. In the drawings:

[0019] Figure 1 Fig. 1 is a schematic view of an anti-corrosion sewage pipeline inspection well structure according to the utility model;

[0020] Figure 2 Fig. 2 is a schematic view of performance test results of treating hydrogen sulfide gas in a pipeline by using the device and method according to the utility model.

[0021] In the drawings: 1, well cover; 2, copper plating layer; 3, wire; 4, ladder; 5, iron block; 6, hard plastic pipe; 7, well body; 8, pipe body. DETAILED DESCRIPTION

[0022] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0023] In order to make the above-mentioned purposes, features and advantages of the present application more apparent, obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0024] Referring to FIG. 1, Figure 1 The present embodiment provides an anti-corrosion sewage pipeline inspection well, which comprises a pipe body 8 and a well body 7, the pipe body 8 is communicated with the well body 7, a well cover 1 is arranged on the top of the well body 7, a crawling ladder 4 is fixedly connected to the inner wall of the well body 7, and the well cover 1 and the crawling ladder 4 are arranged on the outer surface of the pipe body 8 and the well body 7.

[0025] An iron block 5 is arranged at the bottom of the pipe body 8.

[0026] A plurality of copper plating layers 2 are arranged on the inner wall of the pipe body 8 and the well body 7 and the outer surface of the well cover 1 and the crawling ladder 4.

[0027] A wire 3 is fixedly connected to one end of the iron block 5 and connected to the plurality of copper plating layers 2 at the other end.

[0028] The iron block 5, the copper plating layer 2 and the wire 3 are connected, and the sewage containing hydrogen sulfide in the pipeline can be used as an electrolyte solution, so as to form galvanic corrosion. Among them, since the metal activity of iron is stronger than that of copper, the iron block 5 serves as an anode and the copper plating layer 2 serves as a cathode.

[0029] The iron anode will undergo an oxidation reaction, and the electrode reaction formula is Fe-2e - =Fe 2+ . The electrons are transferred to the copper cathode through the metal wire 3. The ferrous ions generated by the loss of electrons of iron will react with hydrogen sulfide in the solution to generate ferrous sulfide precipitate, and the chemical equation is: Fe 2+ +H2S=FeS↓+2H + , thereby inhibiting the escape of H2S into the gas phase and reducing the emission of H2S.

[0030] For the cathode (copper plating layer 2), in the absence of iron, copper will react with hydrogen sulfide, such as Cu 2+ +H2S=CuS↓+2H + , Cu-2e - =Cu 2+ . But when iron exists, the hydrogen ions in the solution (generated by the ionization of hydrogen sulfide ) or dissolved oxygen will preferentially get electrons at the copper surface rather than the copper itself oxidizing. If hydrogen ions get the electrons, the reaction is 2H + + 2e - = H2↑; if oxygen gets the electrons (in the presence of oxygen), the reaction is O2+ 2H2O + 4e - = 4OH - This inhibits corrosion of the copper, and the iron protects the copper by corroding itself, thereby protecting the pipe body 8, well body 7, well cover 1, ladder 4, etc. that are protected by the copper plating layer 2.

[0031] Further optimization, the wire 3 is a pure copper core wire wrapped with an insulating layer.

[0032] The copper core wire 3 has good electrical conductivity and high cost performance.

[0033] Further optimization, the wire 3 is buried inside the well body 7 and the pipe body 8.

[0034] Burial of the wire 3 inside the well body 7 and the pipe body 8 can avoid the wire 3 being washed by the sewage underground, prolonging the service life.

[0035] Further optimization, the copper plating layer 2 on the outside of the well cover 1 is detachably connected to the wire 3 through an interface.

[0036] The well cover 1 is connected to the wire 3 through an interface, facilitating the disassembly of the well cover 1.

[0037] Further optimization, the copper plating layer 2 on the inner wall of the pipe body 8, the inner wall of the well body 7 and the outer surface of the ladder 4 is welded and fixed to the wire 3.

[0038] Further optimization, the hard plastic pipe 6 is inserted on the iron block 5, and the wire 3 is fixed to the iron block 5 inside the hard plastic pipe 6.

[0039] The hard plastic pipe 6 can protect the connection between the wire 3 and the iron block 5, avoid damage to the wire 3 due to long-term friction with the iron block 5, and avoid leakage at the connection.

[0040] To further confirm the effect of the utility model in hydrogen sulfide control and corrosion prevention of inspection well components, the performance test of the device and method of the utility model on the treatment of hydrogen sulfide gas in the pipeline is given as follows: The performance test experiment is carried out in a glass bottle with a working volume of 1000ml, a magnetic stirrer is used for stirring the sewage in the reactor stirring system, the rotating speed is controlled to be 250rpm, and the turbulent condition of the real sewage is simulated. The reactor is insulated by water bath, the reaction temperature is controlled to be (25±1 DEG C), and the real sewage environment temperature is simulated. The sewage used in the experiment is taken from the sewage inspection well of Huaiqing Square, the initial concentration of sulfide is 0, the sewage is stored at 4 DEG C before use, and the sodium sulfide solution is added when used, so that the generated sulfide in the sewage is simulated. Three groups of experiments are carried out, the copper mesh and the iron wire are not placed in the device of the control group R1, the copper mesh and the iron wire are placed in the water in the first experimental group R2 and are completely immersed in the water, and the two are connected by a copper wire; the copper mesh and the iron wire are placed in the water in the second experimental group R3 and are completely immersed in the water, and the two are not connected by the copper wire. The experimental results are shown in Figure 2 As shown in the figure, the copper-iron galvanic corrosion system is effective and feasible for removing the liquid sulfide in the water. Compared with the control group, the experimental group can control the liquid sulfide in the water. In the two different working conditions of copper-iron connection and disconnection, 90% of the liquid sulfide is removed, and 120 minutes and 140 minutes are needed respectively, and the copper-iron connection can remove the sulfide in the water faster.

[0041] The copper surface does not change obviously, in the two different working conditions of copper-iron connection and disconnection, 90% of the liquid sulfide is removed, and 120 minutes and 140 minutes are needed respectively, which shows that the application can directly reduce the generation of sulfide in the water and indirectly protect the inspection well. The experimental data are shown in Figure 2

[0042] This is much slower than directly adding iron ions, but compared with the method of directly adding iron ions, the method does not need continuous addition, and only the corrosion of iron in the copper-iron galvanic corrosion system can continuously remove the liquid sulfide in the water to achieve the purpose of preventing the corrosion of the inspection well.

[0043] The utility model does not exhaust the conventional technical means known to those skilled in the art.

[0044] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, so it cannot be understood as a limitation on the utility model.​

[0045] The above-described embodiments are merely preferred modes of the present application, and are not intended to limit the scope of the present application. Various modifications and improvements to the technical solutions of the present application made by those of ordinary skill in the art without departing from the design spirit of the present application shall fall within the protection scope of the present application as defined by the claims.

Claims

1. A corrosion-resistant sewage pipe inspection well, comprising a pipe body (8) and a well body (7), the pipe body (8) being communicated with the well body (7), a well cover (1) being arranged on the top of the well body (7), and a crawling ladder (4) being fixedly connected to the inner wall of the well body (7), characterized in that, The utility model relates to a kind of well lid and pipe body, including: Iron block (5), the iron block (5) is placed in the bottom of the pipe body (8); Several copper plating layers (2), the copper plating layer (2) is electroplated in the inner wall of the pipe body (8) and the well body (7) and the outer surface of the well lid (1) and the ladder (4); Wire (3), one end of the wire (3) is fixed with the iron block (5), and the other end is connected with several copper plating layers (2) respectively.

2. The corrosion resistant sewer access hole of claim 1, wherein: The wire (3) is pure copper core wire wrapped with insulation layer.

3. The corrosion resistant sewer access hole of claim 1, wherein: The wire (3) is buried in the inside of the well body (7) and the pipe body (8).

4. The corrosion resistant sewer access hole of claim 1, wherein: The copper plating layer (2) outside the well lid (1) is detachably connected with wire (3) through interface.

5. The corrosion resistant sewer access hole of claim 1, wherein: The copper plating layer (2) of the inner wall of the pipe body (8), the inner wall of the well body (7) and the outer surface of the ladder (4) is welded with the wire (3) fixedly.

6. The corrosion resistant sewer access hole of claim 1, wherein: Hard plastic tube (6) is inserted on the iron block (5), and the wire (3) is fixed with the iron block (5) located in the hard plastic tube (6) interior.

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