Pipe bevel rust prevention device

Abstract

The utility model belongs to pipeline construction technical field, concretely is a pipeline bevel rust -preventing device that pipeline construction interval uses, including with the round cover of pipeline outer diameter adaptation closes the board, the inner side wall of round cover closes the board is provided with the outer seal part for the adhesion pipeline outer wall, still including with the inner seal disc of pipeline inner diameter adaptation, the inner seal disc is fixed in the side wall of round cover closes the board inner end surface, the inner side wall of inner seal disc is provided with the inner seal part for the adhesion pipeline inner wall. The utility model has realized multiple sealing, the effect of moisture -proof is extremely reliable, provided the initiative dehumidification mechanism, fundamentally has restrained the corrosion, and the device is fixed firm and is lossless, and the applicability is extensive, and the operation is convenient and can be reused, and the economic benefit is remarkable, is applicable to the rust -prevention of pipeline bevel.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline construction technology, specifically a pipeline beveling rust prevention device used during pipeline construction intervals. Background Technology

[0002] In long-distance pipeline laying projects, segmented construction is commonly used. After the pipeline is transported to the construction site, the bevels at its joints are usually ground to expose the metal substrate to meet the requirements of subsequent welding processes. However, due to factors such as construction progress and weather conditions, some pipelines with completed beveling cannot be fully assembled and welded on the same day, causing their bevels to be exposed to the outdoor environment overnight or for longer periods. Currently, construction workers typically take temporary sealing measures at the end of the workday. However, these conventional temporary sealing measures have significant drawbacks and are difficult to effectively protect the bevels, specifically: Using flexible materials such as plastic sheeting or tarpaulin in conjunction with tape for sealing: While this method is inexpensive and easy to operate, its sealing strength is low, relying heavily on the adhesion between the tape and the pipe wall. In outdoor construction environments, the sealing material is easily damaged and detached by wind, leading to sealing failure and leaving the bevel completely exposed to humid air.

[0003] Prefabricated plastic caps are used for sealing: This method offers some rigidity compared to flexible sealing, but it typically uses universal components, making it difficult to achieve a tight fit with pipes of different diameters, those with ellipticity, or those with uneven surfaces. Therefore, gaps generally exist between the cap and the pipe wall. When the ambient temperature drops at night, humid air can penetrate the cap through these gaps and condense into water droplets on the beveled metal surface, which is below the dew point. This causes electrochemical corrosion and rust to occur on the bevel within a short period.

[0004] Existing patented sealing device (Chinese utility model patent with authorization announcement number CN207921581U): This patent discloses a non-destructive sealing device for pipe openings, which is fixed to the outer wall of the pipe by a blind flange cover, rubber gasket, and tightening bolts to achieve the function of preventing dust and debris. However, its core purpose is to seal both ends of the pipe to prevent debris from entering, rather than to protect the bevel surface from rust. The sealing contact surface between the device and the pipe opening is concentrated on the flat area of ​​the pipe end face, which cannot cover the inclined bevel surface, causing the bevel metal to remain exposed to the humid air inside the sealing cavity.

[0005] The aforementioned defects in the existing technology directly lead to the necessity of secondary grinding of the rusted bevel before the next day or subsequent construction. This not only significantly increases unnecessary construction workload and reduces project efficiency, but also may alter the original precision of the bevel due to secondary grinding, posing a potential risk to the final pipe connection and welding quality, and affecting the overall quality of the project. Utility Model Content

[0006] To address the aforementioned shortcomings in the existing technology, this utility model aims to provide a pipe bevel rust prevention device to improve sealing efficiency and prevent bevel corrosion.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a pipe bevel rust prevention device, including a round cover plate adapted to the outer diameter of the pipe, the inner side wall of the round cover plate is provided with an outer sealing part for fitting the outer wall of the pipe, and also includes an inner sealing disc adapted to the inner diameter of the pipe, the inner sealing disc is fixed to the side wall of the inner end face of the round cover plate, and the outer side wall of the inner sealing disc is provided with an inner sealing part for fitting the inner wall of the pipe.

[0008] As a limitation of this utility model: the inner diameter of the round cover plate is larger than the outer diameter of the pipe, and the outer sealing part is a sealing ring that is fixed to the inner wall of the round cover plate and extends inward, and the inner diameter of the sealing ring is smaller than the outer diameter of the pipe.

[0009] As a limitation of this utility model: the sealing ring includes a body arranged circumferentially along the round cover plate, and the sealing ring also includes a protrusion integrally formed with the body and extending toward the axis of the round cover plate.

[0010] As a limitation of this utility model: there are two protrusions, and they are spaced apart along the axial direction of the round cover plate.

[0011] As a limitation of this utility model: the outer diameter of the inner sealing disc is smaller than the inner diameter of the pipe, the inner sealing part is a circular airbag fixed on the outer ring of the inner sealing disc, and the outer diameter of the circular airbag after inflation is larger than the inner diameter of the pipe.

[0012] As a limitation of this utility model: the annular airbag is connected to an air pump device, the air pump device is fixed to the inner end face of the circular cover plate, and the outer end face of the circular cover plate is fixed with a display panel for controlling the operation of the air pump. The air pump and the display panel are electrically connected through the circular cover plate.

[0013] As a limitation of this utility model: the inner end face of the round cover plate is fixedly connected to the inner sealing plate through a hollow accommodating cavity, a desiccant is detachably disposed in the accommodating cavity, and a vent hole is opened on the side wall of the accommodating cavity.

[0014] By adopting the above technical solution, the beneficial effects achieved by this utility model compared with the prior art are as follows: (1) Achieving multiple seals with extremely reliable moisture-proof effect: The invention forms a first physical barrier by having an outer sealing part consisting of a sealing ring fixed to the inner wall of the circular cover plate tightly adhere to the outer wall of the pipe; at the same time, the inner sealing part consisting of a circular airbag expands after inflation and forms a tight compression contact with the inner wall of the pipe, thus forming a second active sealing barrier. The two sealing structures work together to adaptively compensate for defects such as poor roundness and unevenness of the inner wall of the pipe, dynamically filling and blocking all potential gaps, thereby achieving a comprehensive and dead-angle-free seal for the annular space where the pipe bevel is located, fundamentally eliminating the intrusion path of external humid air. At the same time, since both the inner and outer sides are sealed, the inclined bevel surface can be completely covered in all directions, solving the problems of moisture permeation, condensation, and incomplete coverage in the prior art.

[0015] (2) Provides an active dehumidification mechanism to fundamentally inhibit corrosion: The present invention detachably sets a desiccant in a hollow accommodating cavity. The accommodating cavity is connected to the sealed space between two sealing structures through the vent holes on the side wall. This design allows the residual moisture in the limited space sealed around the pipe bevel to be continuously and actively adsorbed and eliminated by the desiccant, which significantly reduces the air humidity in the sealed space until a dry state that inhibits metal corrosion is reached. This achieves a technological leap from "passive isolation" to "actively creating a dry environment", ensuring that the bevel can always maintain its metallic luster during storage.

[0016] (3) The device is firmly and securely fixed without damage, and has wide applicability: After inflation, the inner sealing disc and its annular airbag are evenly pressed against the inner wall of the pipe by the gas pressure, generating static friction. This "inside-out" clamping and fixing method makes the entire device able to resist external forces such as strong winds, and it is not easy to fall off, making the fixation extremely reliable. At the same time, this fixing method is a surface contact, which will not cause mechanical damage to the inner wall of the pipe, achieving non-destructive sealing and meeting the construction quality requirements. In addition, the sealing ring structure and the airbag structure have a certain degree of dimensional self-adaptation capability, enabling the same device to adapt to the fluctuating pipe diameter within a certain range, improving the versatility of the device.

[0017] (4) Convenient operation and reusable, with significant economic benefits: The device can be easily installed and disassembled by inflating and deflating the airbag through an external air pump device. The operation process is simple and fast, which greatly improves construction efficiency. The main components of the device (round cover plate, inner sealing plate, etc.) are all designed with a robust and durable structure. The desiccant is replaceable, which allows the entire device to be used for a long time, effectively reducing the cost of single use and avoiding the waste of traditional disposable sealing materials (such as plastic sheeting and tape), which is in line with the concept of green construction.

[0018] In summary, this utility model achieves multiple seals, provides extremely reliable moisture protection, offers an active dehumidification mechanism, fundamentally inhibits corrosion, ensures the device is securely fixed and undamaged, has wide applicability, is easy to operate and reusable, and offers significant economic benefits. It is suitable for rust prevention of pipe bevels. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a front view of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the internal structure of an embodiment of the present invention viewed from the right (the annular airbag is not inflated). Figure 3 This is a schematic diagram of the use of an embodiment of the present invention (circular airbag inflated state); Figure 4 This is a rear view of an embodiment of the present utility model.

[0021] In the diagram: 1-circular cover plate, 2-sealing ring, 3-inner sealing disc, 4-circular airbag, 5-air pump device, 6-display panel, 7-accommodating cavity, 8-desiccant, 9-pipe, 10-first vent, 11-second vent. Detailed Implementation

[0022] The preferred embodiments of this utility model are described below with reference to the accompanying drawings. It should be understood that the pipe beveling rust prevention device described herein is a preferred embodiment and is only used for illustration and explanation of this utility model, and does not constitute a limitation thereof.

[0023] The directional terms or positional relationships used in this utility model, such as "up," "down," "left," and "right," are based on the positional relationships in the accompanying drawings of this utility model. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component must have a specific orientation, or that it must be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the content protected by this utility model.

[0024] This implementation example Figures 1-4 As shown, a pipe bevel rust prevention device includes a round cover plate 1 adapted to the outer diameter of the pipe. The inner side wall of the round cover plate 1 is provided with an outer sealing part for fitting the outer wall of the pipe. It also includes an inner sealing disc 3 adapted to the inner diameter of the pipe. The inner sealing disc 3 is fixed to the side wall of the inner end face of the round cover plate 1. The outer side wall of the inner sealing disc 3 is provided with an inner sealing part for fitting the inner wall of the pipe. Specifically, the circular cap 1 is circular, including a circular end and a vertical edge integrally connected to the outer edge of the end. The space enclosed by the end and the edge is the inner side of the circular cap 1. The outer sealing part is a sealing ring 2 fixed to the inner wall of the circular cap 1 and extending inward. The sealing ring 2 is made of rubber and includes a body embedded in the circular cap 1 along the circumference of the inner wall of the circular cap 1. The sealing ring 2 also includes a protrusion integrally formed with the body and extending towards the axis of the circular cap 1. In this embodiment, there are two sealing rings, spaced apart along the axial direction of the circular cap 1, which can play a double sealing role. The inner diameter of the circular cap 1 is slightly larger than the outer diameter of the pipe to be sealed, and the inner diameter of the protrusion is smaller than the outer diameter of the pipe. This arrangement ensures that the circular cap 1 can be smoothly fastened to the end of the pipe, and the sealing ring 2 is interference-fitted with the pipe, causing a certain degree of deformation of the sealing ring 2 to ensure the sealing of the pipe.

[0025] The inner sealing disc 3 has a circular structure, and the inner sealing part is an annular airbag 4 fixed to the outer ring of the inner sealing disc 3. The outer diameter of the inner sealing disc 3 is smaller than the inner diameter of the pipe, and the outer diameter of the annular airbag 4 after inflation is larger than the inner diameter of the pipe. The annular airbag 4 is connected to an air pump device 5 for inflating its interior. In this embodiment, the air pump device 5 is fixed to the inner end face of the circular cover plate 1, and the outer end face of the circular cover plate 1 is fixed with a display panel 6 for controlling the operation of the air pump. The air pump and the display panel 6 are electrically connected through the circular cover plate 1, and a first vent hole 10 is provided on the circular cover plate 1 to connect the air pump device 5 to the outside of the circular cover plate 1, facilitating the air pump's intake and exhaust. The air pump device 5 and the display panel 6 are both prior art and will not be described in detail here. They can be integrated with a rechargeable power supply or connected to an external power supply (not shown in the figure). In other embodiments, the air pump can be placed in other locations as needed, such as the outside of the circular cover plate 1.

[0026] The inner and outer sealing parts cooperate to form a closed space that can completely cover the end of the pipe. The inner end face of the round cover plate 1 is fixed to the inner sealing plate 3 through a hollow accommodating cavity 7. The accommodating cavity 7 is located in the above-mentioned closed space. A cavity door (not shown in the figure) is opened on the accommodating cavity 7. A desiccant 8 is detachably installed in the accommodating cavity 7. The desiccant 8 can be any of the existing technologies. One or more second vent holes 11 are opened on the side wall of the accommodating cavity 7. The above-mentioned closed space is dried through the second vent holes 11, which further avoids the corrosion of the bevel.

[0027] When using this embodiment, as Figure 3As shown, the dimensions of this device are determined according to the outer diameter of the pipe 9 being constructed, ensuring that the sealing ring 2 of the round cover plate 1 is tightly fitted to the outer wall of the pipe 9. Before use, sufficient desiccant 8 is added to the accommodating cavity 7. The device is then fitted onto the pipe opening, and the air pump is operated via the control panel to inflate the airbag. After the airbag inflates, it fits tightly against the inner wall of the pipe, providing fixation and sealing. Before the next construction, the airbag is deflated via the control panel, and the device is removed. It should be noted that this device can be used in pairs at both ends of the pipe 9, or it can be used alone at one end of the pipe 9, and the device is reusable.

Claims

1. A pipe bevel rust prevention device, characterized in that: It includes a round cover plate that is adapted to the outer diameter of the pipe, and the inner side wall of the round cover plate is provided with an outer sealing part for fitting the outer wall of the pipe. It also includes an inner sealing disc that is adapted to the inner diameter of the pipe, the inner sealing disc is fixed to the side wall of the inner end face of the round cover plate, and the outer side wall of the inner sealing disc is provided with an inner sealing part for fitting the inner wall of the pipe.

2. The pipe beveling rust prevention device according to claim 1, characterized in that: The inner diameter of the round cover plate is larger than the outer diameter of the pipe. The outer sealing part is a sealing ring that is fixed to the inner wall of the round cover plate and extends inward. The inner diameter of the sealing ring is smaller than the outer diameter of the pipe.

3. The pipe beveling rust prevention device according to claim 2, characterized in that: The sealing ring includes a body disposed circumferentially along the cover plate, and also includes a protrusion integrally disposed with the body and extending toward the axis of the cover plate.

4. The pipe beveling rust prevention device according to claim 3, characterized in that: There are two protrusions, and they are spaced apart along the axial direction of the round cover plate.

5. The pipe beveling rust prevention device according to claim 1, characterized in that: The outer diameter of the inner sealing disc is smaller than the inner diameter of the pipe. The inner sealing part is a circular airbag fixed on the outer ring of the inner sealing disc. The outer diameter of the circular airbag after inflation is larger than the inner diameter of the pipe.

6. The pipe beveling rust prevention device according to claim 5, characterized in that: The annular airbag is connected to an air pump device, which is fixed to the inner end face of the circular cover plate. The outer end face of the circular cover plate is fixed with a display panel for controlling the operation of the air pump. The air pump and the display panel are electrically connected through the circular cover plate.

7. The pipe beveling rust prevention device according to any one of claims 1 to 6, characterized in that: The inner end face of the round cover plate is fixedly connected to the inner sealing plate through a hollow accommodating cavity. A desiccant is detachably installed in the accommodating cavity, and a vent hole is opened on the side wall of the accommodating cavity.

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