Manhole purging system and pipeline emergency system
By integrating the purge pipe and drain pipe on the manhole cover plate, the problems of high production costs and corrosion accumulation in the existing system are solved, and the effects of cost saving and corrosion prevention are achieved.
Patent Information
- Application Number
- CN202421497150.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-06-27
AI Technical Summary
The existing manhole purge system has problems such as high production costs, accumulation of condensate and corroding pipelines.
A system that integrates purge pipe and drain pipe on the manhole cover plate is designed. By reducing the number of holes and installation distance, it saves installation space and workload for workers, and at the same time, a drain pipe is installed at the bottom of the manhole to prevent water accumulation.
It effectively reduces production costs, prevents the accumulation and corrosion of condensate in manholes, reduces the risk of gas leakage, and saves investment and platform size.
Smart Images
Figure CN222758263U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of industrial equipment, and in particular to a manhole purge system and a pipeline emergency system. Background Art
[0002] The main drawback of the dry bag dust removal process for blast furnaces is that it cannot effectively remove the acidic gases contained in the blast furnace gas, which leads to the corrosion failure of the subsequent gas pipelines and ancillary equipment, and forms a hidden danger of gas leakage. In particular, the blast furnace increases the amount of coal injection to reduce the coke ratio, which produces acidic gases containing S elements during the blast furnace smelting process; the sintered ore used adds a large amount of chlorine-containing additives (such as CaCl2) to improve its drum strength, which produces acidic gases containing Cl elements during the blast furnace smelting process. These acidic gases cannot be removed by the dry bag dust removal process, and enter the gas pipeline network with the blast furnace gas, and continuously dissolve in the condensed water precipitated by the gas due to cooling, thereby forming an acidic solution with a very low pH value to corrode the gas pipeline. Due to the structural characteristics of the manhole, it is easy to cause condensed water to accumulate, and there is no drainage facility, which causes corrosion and gas leakage.
[0003] In the production of industrial furnaces, newly built pipelines need to be purged to blow out the dirt in the pipelines; or when the equipment is overhauled, the gas needs to be blown out. If the gas in the pipeline cannot be blown out, there is a safety risk. The principle of gas purging is to use inert gas to drive away the residual air in the gas pipeline. Nitrogen is generally used for gas pipeline purging, and high-purity gas or steam is used in special cases. Manhole purge system and pipeline emergency system After the existing gas pipeline valve, a manhole and a purge hole are set respectively. The two separate devices require two holes to be opened in the gas pipeline, which increases the hole opening cost; and the bottom elevation of the outdoor gas pipeline is generally more than 5 meters. The valve and the equipment behind the valve need to consider the convenience of overhaul and maintenance, and set up an overhaul platform. The manhole and purge pipe are set separately, which increases the platform length in the direction of the valve length, increasing the corresponding cost.
[0004] In summary, the existing manhole purge system has technical problems such as high production cost, accumulation of condensed water and corrosion of pipelines. Utility Model Content
[0005] In view of the shortcomings of the existing methods, the present application proposes a manhole purge system and a pipeline emergency system to solve the technical problems of high production cost, accumulation of condensed water and corrosion of pipelines in the existing technology.
[0006] In a first aspect, an embodiment of the present application provides a manhole purge system for a gas pipeline, including a manhole pipe, a manhole cover, a purge pipe, and a drain pipe:
[0007] A manhole pipe connected to the side wall of the gas pipeline;
[0008] A manhole cover plate, covering the pipe opening of the manhole pipe;
[0009] A purge pipe, one end of which passes through the manhole cover plate and extends into the manhole pipe, and the other end of which is connected to an external power source;
[0010] A drainage pipe has one end that passes through the manhole cover plate and extends into the manhole pipe, and the other end is connected to the outside.
[0011] In some embodiments of the present application, the manhole pipe extends vertically downward or obliquely downward along the side wall of the gas pipeline.
[0012] In some embodiments of the present application, the angle between the axis of the manhole pipe and the horizontal plane is not less than 30 degrees and not more than 60 degrees.
[0013] In some embodiments of the present application, the height of the connection point between the drain pipe and the manhole cover is lower than the height of the connection point between the purge pipe and the manhole cover.
[0014] In some embodiments of the present application, the extension directions of the purge pipe and the drain pipe are parallel to the axial direction of the manhole pipe.
[0015] In some embodiments of the present application, the purge pipe passes through the center of the manhole cover, and the drain pipe passes through the edge of the manhole cover.
[0016] In some embodiments of the present application, at least one purge valve is further included, wherein the purge valve is connected to a region of the purge pipe located outside the manhole pipe.
[0017] In some embodiments of the present application, at least one drain valve is further included, and the drain valve is connected to a region of the drain pipe located outside the manhole pipe.
[0018] In some embodiments of the present application, the purge pipe is provided with a first purge valve and a second purge valve spaced apart from each other, and the drain pipe is provided with a first drain valve and a second drain valve spaced apart from each other.
[0019] In a second aspect, an embodiment of the present application further provides a pipeline emergency system, comprising a gas pipeline and a manhole purge system as described in any one of the embodiments in the first aspect, wherein the manhole purge system is installed on a side wall of the gas pipeline.
[0020] The beneficial technical effects brought about by the technical solution provided in the embodiment of the present application include: the embodiment of the present application integrates a purge pipe and a drain pipe on the manhole cover, which not only reduces the number of times and costs of opening holes on the pipeline, but also reduces the installation distance required for the installation of each component separately, while saving installation space, reducing the workload of workers, and reducing the size of the platform, saving investment; the drain pipe can discharge condensed water at the bottom of the manhole in time, and can prevent water accumulation in the manhole pipe, thereby significantly improving the corrosion of the manhole, reducing the occurrence of gas leakage, and avoiding gas leakage caused by pipeline corrosion due to water accumulation.
[0021] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:
[0023] Figure 1 This is a schematic diagram of the structure of a manhole purge system in an embodiment of the present application.
[0024] Reference numerals:
[0025] 1-gas pipeline; 2-manhole pipe; 3-first purge valve; 4-second purge valve; 5-purge pipe; 6-first drain valve; 7-second drain valve; 8-drain pipe. DETAILED DESCRIPTION
[0026] The embodiments of the present application are described below in conjunction with the drawings in the present application. It should be understood that the implementation methods described below in conjunction with the drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions of the embodiments of the present application.
[0027] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an", "above", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application means the presence of the features, integers, steps, operations, elements, and / or components, but does not exclude the implementation of other features, information, data, steps, operations, elements, components, and / or combinations thereof supported by the technical field.
[0028] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings. It should be noted that the following implementation methods can refer to, learn from or combine with each other, and the same terms, similar features and similar implementation steps in different implementation methods will not be described repeatedly.
[0029] In view of the shortcomings of the existing methods, the present application proposes a manhole purge system and a pipeline emergency system to solve the technical problems of high production cost, accumulation of condensed water and corrosion of pipelines in the existing technology.
[0030] In a first aspect, an embodiment of the present application provides a manhole purge system, such as Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of a manhole purge system in an embodiment of the present application.
[0031] A manhole purge system, used for a gas pipeline 1, comprises a manhole pipe 2, a manhole cover plate, a purge pipe 5 and a drain pipe 8:
[0032] A manhole pipe 2 is connected to the side wall of the gas pipeline 1;
[0033] A manhole cover plate, covering the pipe opening of the manhole pipe 2;
[0034] A purge pipe 5, one end of which passes through the manhole cover plate and extends into the manhole pipe 2, and the other end of which is connected to an external power source;
[0035] One end of the drainage pipe 8 passes through the manhole cover plate and extends into the manhole pipe 2, and the other end is connected to the outside.
[0036] The embodiment of the present application integrates the purge pipe 5 and the drain pipe 8 on the manhole cover, which not only reduces the number of times and costs of opening holes on the pipeline, but also reduces the installation distance required for installing each component separately, saves installation space, reduces the workload of workers, and reduces the size of the platform, saving investment; the drain pipe 8 can discharge condensed water at the bottom of the manhole in time, and can prevent water accumulation in the manhole pipe 2, thereby significantly improving the corrosion of the manhole, reducing the occurrence of gas leakage, and avoiding gas leakage caused by pipeline corrosion due to water accumulation.
[0037] In some embodiments of the present application, the manhole pipe 2 extends vertically downward or obliquely downward along the side wall of the gas pipeline 1 .
[0038] In some embodiments of the present application, the angle between the axis of the manhole pipe 2 and the horizontal plane is not less than 30 degrees and not more than 60 degrees.
[0039] In this embodiment, the manhole pipe 2 is located at a 45° angle downward from the gas pipeline 1 .
[0040] In some embodiments of the present application, the height of the connection point between the drain pipe 8 and the manhole cover is lower than the height of the connection point between the purge pipe 5 and the manhole cover.
[0041] In some embodiments of the present application, the extension directions of the purge pipe 5 and the drain pipe 8 are both parallel to the axial direction of the manhole pipe 2 .
[0042] In some embodiments of the present application, the purge pipe 5 passes through the center of the manhole cover, and the drain pipe 8 passes through the edge of the manhole cover.
[0043] In this embodiment, the purge pipe 5 is located in the middle of the manhole and the drain pipe 8 is located at the bottom of the manhole.
[0044] In some embodiments of the present application, at least one purge valve is further included, and the purge valve is connected to a region of the purge pipe 5 located outside the manhole pipe 2 .
[0045] In some embodiments of the present application, at least one drain valve is further included, and the drain valve is connected to a region of the drain pipe 8 located outside the manhole pipe 2 .
[0046] In this embodiment, a primary gate valve is provided on the purge pipe 5. A primary gate valve is provided on the drain pipe 8.
[0047] In some embodiments of the present application, the purge pipe 5 is provided with a first purge valve 3 and a second purge valve 4 spaced apart from each other, and the drain pipe 8 is provided with a first drain valve 6 and a second drain valve 7 spaced apart from each other.
[0048] In this embodiment, the purge pipe 5 extends downward after passing through the primary gate valve and is installed with a secondary gate valve. The drain pipe 8 extends downward after passing through the primary gate valve and is installed with a secondary gate valve.
[0049] The purge pipe 5 is provided with two gate valves, which are arranged in series in the middle of the purge pipe 5. The drain pipe 8 is provided with two gate valves, which are arranged in series in the middle of the drain pipe 8.
[0050] In a second aspect, an embodiment of the present application further provides a pipeline emergency system, comprising a gas pipeline 1 and a manhole purge system as described in any one of the embodiments in the first aspect, wherein the manhole purge system is installed on the side wall of the gas pipeline 1 .
[0051] The utility model proposes a manhole purge system that can prevent water accumulation, which can effectively avoid the situation where conventional manhole purge systems are corroded by water accumulation and cause gas leakage. Different from conventional practices, the utility model sets a drain pipe 8 at the bottom of the manhole, which can timely discharge the condensed water at the bottom of the manhole, and can significantly improve the corrosion of the manhole.
[0052] When purging is required, open the two gate valves on the purge pipe 5 and connect the nitrogen pipeline for purging. When it is determined that there is water at the bottom of the manhole, wear an air breathing mask, open the two gate valves on the drain pipe 8, drain the water, and close the two gate valves when there is no water to be discharged. Since the condensed water at the bottom of the manhole can be discharged in time, the corrosion of the manhole can be significantly reduced and the occurrence of gas leakage can be reduced.
[0053] Compared with the prior art, the application of the embodiments of the present application can achieve at least the following beneficial effects: the embodiments of the present application integrate the purge pipe 5 and the drain pipe 8 on the manhole cover, which not only reduces the number of holes opened on the pipeline and the cost, but also reduces the installation distance required for the installation of each component separately, saves installation space, reduces the workload of workers, reduces the size of the platform, and saves investment; the drain pipe 8 can discharge the condensed water at the bottom of the manhole in time, prevent water accumulation in the manhole pipe 2, thereby significantly improving the corrosion of the manhole, reducing the occurrence of gas leakage, and avoiding gas leakage caused by pipeline corrosion due to water accumulation.
[0054] In the description of the present application, the directions or positional relationships indicated by the words "up", "down", "left", "right", "vertical", "horizontal", etc. are based on the exemplary directions shown in the drawings, and do not indicate or imply that the device or component referred to must have a specific orientation. The terms "first" and "second" are used for descriptive purposes only, and the features specified as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, "multiple" means two or more. It should be noted that the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two elements. In addition, the "connection" used here may include a wireless connection.
[0055] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.
[0056] Those skilled in the art will appreciate that the various operations, methods, steps, measures, and schemes in the processes discussed in this application may be alternated, modified, rearranged, decomposed, combined, or deleted.
[0057] The above is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the technical concept of the scheme of the present application, other similar implementation methods based on the technical ideas of the present application are also within the protection scope of the embodiments of the present application.
Claims
1. A manhole purge system for a gas pipeline, characterized in that: include: A manhole pipe connected to the side wall of the gas pipeline; A manhole cover plate, covering the pipe opening of the manhole pipe; A purge pipe, one end of which passes through the manhole cover plate and extends into the manhole pipe, and the other end of which is connected to an external power source; A drainage pipe has one end that passes through the manhole cover plate and extends into the manhole pipe, and the other end is connected to the outside.
2. The manhole purge system according to claim 1, characterized in that: The manhole pipe extends vertically downward or obliquely downward along the side wall of the gas pipeline.
3. The manhole purge system according to claim 2, characterized in that: The angle between the axis of the manhole pipe and the horizontal plane is not less than 30 degrees and not more than 60 degrees.
4. The manhole purging system according to claim 2, characterized in that: The height of the connection point between the drain pipe and the manhole cover is lower than the height of the connection point between the purge pipe and the manhole cover.
5. The manhole purging system according to claim 4, characterized in that: The extension directions of the purge pipe and the drain pipe are both parallel to the axial direction of the manhole pipe.
6. The manhole purging system according to claim 4, characterized in that: The purge pipe passes through the center of the manhole cover, and the drain pipe passes through the edge of the manhole cover.
7. The manhole purging system according to claim 1, characterized in that: The device further comprises at least one purge valve connected to a region of the purge pipe located outside the manhole pipe.
8. The manhole purging system according to claim 7, characterized in that: The device further comprises at least one drain valve connected to a region of the drain pipe located outside the manhole pipe.
9. The manhole purging system according to claim 8, characterized in that: The purge pipe is provided with a first purge valve and a second purge valve spaced apart from each other, and the drain pipe is provided with a first drain valve and a second drain valve spaced apart from each other.
10. A pipeline emergency system, characterized in that: It comprises a gas pipeline and a manhole purge system as claimed in any one of claims 1 to 9, wherein the manhole purge system is installed on the side wall of the gas pipeline.