Gas holder inlet and outlet pipeline maintenance system

What is AI technical title?
AI technical title is built by Patsnap AI team. It summarizes the technical point description of the patent document.
By adopting a water sealing tank design in the gas cabinet inlet and outlet pipelines, the incompressibility of water is used to form a seal, which solves the problems of high cost and complex operation of traditional sealing devices, and achieves an efficient, safe and economical gas sealing effect.

CN223282900UActive Publication Date: 2025-08-29HAINAN VOCATIONAL COLLEGE OF SCI & TECH

View PDF 0 Cites 0 Cited by

Patent Information

Application Number: CN202422866564.5
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-11-25
Publication Date: 2025-08-29
Estimated Expiration: 2034-11-25

AI Technical Summary

Technical Problem

The existing gas cabinet inlet and outlet pipelines are susceptible to corrosion, pressure fluctuations and environmental factors during long-term operation, resulting in a decrease in sealing. Traditional valves and complex mechanical sealing devices are costly, complex in operation and prone to failure, and cannot effectively prevent gas leakage, which poses safety hazards.

Method used

The water seal tank design is adopted, and the incompressibility of water is used to inject water seal tanks into a seal when maintenance is required. It uses the physical characteristics of water to prevent gas leakage. It has a simple structure, low cost and easy operation.

Benefits of technology

It realizes efficient, safe and economical gas sealing, reduces maintenance costs, simplifies operating procedures, improves seal reliability, and avoids the risk of gas leakage.

✦ Generated by Eureka AI based on patent content.

Smart Images

Figure CN223282900U_ABST

Patent Text Reader

Abstract

A gas holder inlet and outlet pipeline maintenance system comprises a gas holder, a gas holder inlet line, a gas holder outlet line, an inlet water-sealed tank and an outlet water-sealed tank, the inlet water-sealed tank is connected with an inlet of the gas holder through an inlet water-sealed tank outlet line, and the outlet water-sealed tank is connected with an outlet of the gas holder through an outlet water-sealed tank inlet line. The tail ends of the gas holder inlet line and the outlet water seal tank inlet line correspondingly extend into the inlet water seal tank and the outlet water seal tank from the top of the tank, the starting end of the gas holder outlet line is connected with the outlet water seal tank, the side face of the inlet water seal tank is connected with the inlet water seal tank water inlet line, and the side face of the outlet water seal tank is connected with the outlet water seal tank water inlet line. A first stop valve is arranged on the gas holder inlet line, the front side and the rear side of the first stop valve on the gas holder inlet line are connected into a first emptying line and a condensate draining line respectively, a second stop valve is arranged on the gas holder outlet line, and the rear side of the second stop valve on the gas holder outlet line is connected into a second emptying line. The system can effectively prevent gas leakage when the inlet and outlet pipelines of the gas holder are overhauled.

Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model belongs to the field of petrochemical oil storage and transportation, and specifically relates to a gas cabinet inlet and outlet pipeline inspection and maintenance system. Background Art

[0002] Gasholders are indispensable equipment in numerous industrial sectors, such as the chemical industry and natural gas storage and distribution. They are primarily used to store gas and play a crucial role in regulating gas supply and balancing system pressure. Gasholder inlet and outlet piping is the pathway for gas to enter and exit the gasholder, and its proper operation is crucial to the functionality of the entire gasholder system.

[0003] During long-term operation, gasholder inlet and outlet pipelines face numerous risks. For example, the corrosive effects of gas components can gradually thin the pipeline walls. Pressure fluctuations and erosion caused by frequent gas flow can loosen pipeline joints or create microscopic cracks. Furthermore, external environmental factors such as temperature fluctuations and humidity can also affect the structural integrity of the pipelines. If these issues are not promptly repaired, they can lead to gas leaks, which not only waste resources but can also cause serious safety incidents. For example, in the chemical industry, flammable gas leaks can cause explosions and fires, while toxic gas leaks can endanger human health and the environment. Therefore, inspecting and repairing gasholder inlet and outlet pipelines is crucial.

[0004] Traditionally, valves have been relied upon to isolate gas tank inlet and outlet pipelines during maintenance. However, valves have numerous shortcomings. Valve sealing relies primarily on the fit between the disc and seat, and the sealing surface is susceptible to wear after prolonged use. A worn sealing surface cannot completely prevent gas leakage, especially in high-precision gas storage systems where even trace amounts of gas leakage are unacceptable. Furthermore, the valve's sealing performance is easily affected by impurities. For example, tiny particles such as rust and dust in the pipeline can become lodged between the disc and seat, compromising the seal.

[0005] In addition to valves, some more complex mechanical seals are used for maintenance isolation. While these devices theoretically provide a good seal, they face numerous practical challenges. First, their complex structure requires specialized technicians for installation and operation, increasing labor costs and operational complexity. Second, these devices are expensive, including equipment purchase, installation, and ongoing maintenance costs, representing a significant expense for businesses. Furthermore, complex mechanical structures mean more points of failure; if a component fails, the entire sealing system could fail. Summary of the Invention

[0006] To overcome the shortcomings of the existing technology, the present invention proposes a gasholder inlet and outlet pipeline inspection and maintenance system. This system utilizes a water-sealed tank design. Under normal circumstances, the water-sealed tank remains dry, allowing gas to flow normally through the gasholder inlet and outlet pipelines. When pipeline inspection and maintenance are required, water is injected into the water-sealed tank until the water level reaches a set level, sealing the gasholder inlet and outlet. The incompressibility of water enables it to form a highly reliable seal, effectively preventing gas leaks. This sealing method utilizes the physical properties of water and is simple and efficient.

[0007] The purpose of the utility model is achieved through the following technical solutions: a gas holder inlet and outlet pipeline inspection and maintenance system, including a gas holder, a gas holder inlet line, a gas holder outlet line, an inlet water seal tank, and an outlet water seal tank. The inlet water seal tank is connected to the inlet of the gas holder through the inlet water seal tank outlet line, and the outlet water seal tank is connected to the outlet of the gas holder through the outlet water seal tank inlet line. The ends of the gas holder inlet line and the outlet water seal tank inlet line extend from the top of the tank into the inlet water seal tank and the outlet water seal tank respectively and are 200mm away from the bottom of the tank. The starting end is connected to the outlet water seal tank, the side of the inlet water seal tank is connected to the inlet water seal tank water inlet line, and the side of the outlet water seal tank is connected to the outlet water seal tank water inlet line. A first shut-off valve is arranged on the gas tank inlet line, and the front and rear sides of the first shut-off valve on the gas tank inlet line are respectively connected to the first vent line and the condensate discharge line. A second shut-off valve is arranged on the gas tank outlet line, and the rear side of the second shut-off valve on the gas tank outlet line is connected to the second vent line. Valves are arranged on the inlet water seal tank water inlet line, the outlet water seal tank water inlet line, the first vent line, the second vent line, and the condensate discharge line.

[0008] Furthermore, an inlet water seal tank inlet valve and an outlet water seal tank inlet valve are respectively provided on the inlet water seal tank water inlet line and the outlet water seal tank water inlet line; a first vent valve is provided on the first vent line, a second vent valve is provided on the second vent line, and a condensate drain valve is provided on the condensate drain line.

[0009] Furthermore, the inlet water seal tank water inlet valve is arranged on the inlet water seal tank water inlet line close to the inlet water seal tank, and the outlet water seal tank water inlet valve is arranged on the outlet water seal tank water inlet line close to the outlet water seal tank.

[0010] Furthermore, an inlet water seal tank level gauge and an outlet water seal tank level gauge are respectively provided on the inlet water seal tank and the outlet water seal tank.

[0011] Furthermore, the bottom of the inlet water seal tank is connected to the inlet water seal tank sewage line, and the bottom of the outlet water seal tank is connected to the outlet water seal tank sewage line.

[0012] Furthermore, the inlet water seal tank drain line is sequentially provided with an inlet water seal tank drain valve and an inlet water seal tank sight glass along the direction close to the inlet water seal tank; the outlet water seal tank drain line is sequentially provided with an outlet water seal tank drain valve and an outlet water seal tank sight glass along the direction close to the outlet water seal tank.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] From a cost perspective, the water seal tank's structure is relatively simple, resulting in low manufacturing costs. Water, as a sealing medium, is inexpensive and readily available, significantly reducing maintenance costs. Regarding operational convenience, filling the water seal tank with water is relatively simple, requiring no specialized skills and can be performed by ordinary operators after simple training. The water seal tank maintenance system is highly reliable. Because the water seal principle is based on the basic physical properties of water, a good seal is guaranteed as long as the water seal tank structure is intact and the water filling operation is performed correctly, providing a safe, economical, and efficient solution for the maintenance of gasholder inlet and outlet pipelines.

[0015] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a gas cabinet inlet and outlet pipeline maintenance system according to an embodiment of the present utility model.

[0017] Reference numerals

[0018] 1-gas holder, 2-inlet water seal tank, 3-inlet water seal tank outlet line, 4-export water seal tank, 5-export water seal tank inlet line, 6-gas holder inlet line, 7-inlet water seal tank water inlet line, 8-gas holder outlet line, 9-export water seal tank water inlet line, 10-inlet water seal tank water inlet valve, 11-export water seal tank water inlet valve, 12-inlet water seal tank level gauge, 13-export water seal tank level gauge, 14-inlet water seal tank drain line, 15-export water seal tank drain line, 16-inlet water seal tank drain valve, 17-inlet water seal tank sight glass, 18-export water seal tank drain valve, 19-export water seal tank sight glass, 20-first vent line, 21-first vent valve, 22-second vent line, 23-second vent valve, 24-first shut-off valve, 25-second shut-off valve, 26-condensate drain line, 27-condensate drain valve. DETAILED DESCRIPTION

[0019] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following will combine the preferred embodiments and drawings to describe in detail the specific implementation method, structure, characteristics and effects of a gas tank inlet and outlet pipeline maintenance system proposed according to the utility model.

[0020] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In this embodiment, "front" and "back" are specified along the flow direction of the medium in the pipeline, and the gas in the gas tank is insoluble in water.

[0022] An embodiment of a gas cabinet inlet and outlet pipeline maintenance system, such as Figure 1 As shown, it includes a gas tank 1, a gas tank inlet line 6 connected to the top of the inlet water seal tank 2, the inlet water seal tank 2 is connected to the inlet of the gas tank 1 through the inlet water seal tank outlet line 3, the starting end of the gas tank outlet line 8 is connected to the outlet water seal tank 4, the outlet water seal tank 4 is connected to the outlet of the gas tank 1 through the outlet water seal tank inlet line 5, the end of the gas tank inlet line 6 extends from the top of the inlet water seal tank 2 into the tank and is 200 mm away from the bottom of the tank, and the end of the outlet water seal tank inlet line 5 extends from the top of the outlet water seal tank 4 into the tank and is 200 mm away from the bottom of the tank to ensure the water seal effect; the side of the inlet water seal tank 2 is connected to the inlet water seal tank water inlet line 7, and an inlet water seal tank water inlet valve 10 is provided on the inlet water seal tank water inlet line 7 near the inlet water seal tank 2, the side of the outlet water seal tank 4 is connected to the outlet water seal tank water inlet line 9, and an outlet water seal tank water inlet valve 11 is provided on the outlet water seal tank water inlet line 9 near the outlet water seal tank 4.

[0023] An inlet water seal tank level gauge 12 is also provided on the inlet water seal tank 2, and an outlet water seal tank level gauge 13 is also provided on the outlet water seal tank 4; the bottom of the inlet water seal tank 2 is connected to the inlet water seal tank drain line 14, and the bottom of the outlet water seal tank 4 is connected to the outlet water seal tank drain line 15. The inlet water seal tank drain line 14 is provided with an inlet water seal tank drain valve 16 and an inlet water seal tank sight glass 17 in sequence along the direction approaching the inlet water seal tank 2, and the outlet water seal tank drain line 15 is provided with an outlet water seal tank drain valve 18 and an outlet water seal tank sight glass 19 in sequence along the direction approaching the outlet water seal tank 4.

[0024] The gas tank inlet line 6 is connected to a first vent line 20 , on which a first vent valve 21 is provided. The gas tank outlet line 8 is connected to a second vent line 22 , on which a second vent valve 23 is provided.

[0025] A first shut-off valve 24 is provided on the gas tank inlet line 6, and the first shut-off valve 24 is located behind the connection between the first vent line 20 and the gas tank inlet line 6. A condensate drain line 26 is connected to the gas tank inlet line 6, and a condensate drain valve 27 is provided on the condensate drain line 26. The connection between the condensate drain line 26 and the gas tank inlet line 6 is located behind the first shut-off valve 24.

[0026] A second shut-off valve 25 is provided on the gas tank outlet line 8 , and the second shut-off valve 25 is located in front of the connection between the second vent line 22 and the gas tank outlet line 8 .

[0027] The first shut-off valve 24 and the second shut-off valve 25 are emergency shut-off valves under normal operating conditions.

[0028] Under normal operating conditions, the inlet water seal tank 2 and the outlet water seal tank 4 are both in a water-free state, and the fuel gas can enter the inlet water seal tank 2 through the gas holder inlet line 6, and then enter the gas holder 1 through the inlet water seal tank outlet line 3; after that, the fuel gas can enter the outlet water seal tank 4 from the gas holder 1 through the outlet water seal tank inlet line 5, and then enter the gas holder outlet line 8 from the outlet water seal tank 4.

[0029] When the inlet and outlet pipelines of the gas holder need to be inspected, the inlet water seal tank inlet valve 10 and the outlet water seal tank inlet valve 11 are opened respectively, and water enters the inlet water seal tank 2 and the outlet water seal tank 4 respectively through the inlet water seal tank inlet line 7 and the outlet water seal tank inlet line 9. When the water level reaches the set liquid level of the inlet water seal tank level gauge 12 and the outlet water seal tank level gauge 13 respectively, the inlet water seal tank inlet valve 10 and the outlet water seal tank inlet valve 11 are closed to seal the combustible gas in the gas holder, and then the first vent valve 21 and the second vent valve 23 are opened respectively, and the condensate drain valve 27 is opened. After the combustible gas and condensate in the pipeline are emptied, the pipeline or valve is inspected.

[0030] When the inspection is completed, open the inlet water seal tank drain valve 16 and the outlet water seal tank drain valve 18 to drain the water in the tank, and check whether the water in the inlet water seal tank 2 and the outlet water seal tank 4 is emptied by observing the inlet water seal tank sight glass 17 and the outlet water seal tank sight glass 19.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent change and modification made by any technician familiar with the profession to the above embodiment based on the technical essence of the present invention without departing from the scope of the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A gas cabinet inlet and outlet pipeline inspection and maintenance system, characterized by: It includes a gas holder, a gas holder inlet line, a gas holder outlet line, an inlet water seal tank, and an export water seal tank. The inlet water seal tank is connected to the inlet of the gas holder through the inlet water seal tank outlet line, and the export water seal tank is connected to the outlet of the gas holder through the export water seal tank inlet line. The ends of the gas holder inlet line and the export water seal tank inlet line extend into the inlet water seal tank and the export water seal tank from the top of the tank respectively and are 200mm away from the bottom of the tank. The starting end of the gas holder outlet line is connected to the export water seal tank, the side of the inlet water seal tank is connected to the inlet water seal tank water inlet line, and the side of the export water seal tank is connected to the export water seal tank water inlet line. A first shut-off valve is arranged on the gas holder inlet line, and the front and rear sides of the first shut-off valve on the gas holder inlet line are respectively connected to the first vent line and the condensate discharge line. A second shut-off valve is arranged on the gas holder outlet line, and the rear side of the second shut-off valve on the gas holder outlet line is connected to the second vent line. Valves are arranged on the inlet water seal tank inlet line, the export water seal tank inlet line, the first vent line, the second vent line, and the condensate discharge line.

2. A gas cabinet inlet and outlet pipeline inspection and maintenance system according to claim 1, characterized in that: The inlet water seal tank water inlet valve and the outlet water seal tank water inlet valve are respectively provided on the inlet water seal tank water inlet line; the first vent valve is provided on the first vent line, the second vent valve is provided on the second vent line, and the condensate drain valve is provided on the condensate drain line.

3. A gas cabinet inlet and outlet pipeline inspection and maintenance system according to claim 2, characterized in that: The inlet valve of the inlet water seal tank is arranged on one end of the inlet water seal tank water inlet line close to the inlet water seal tank, and the outlet water seal tank inlet valve is arranged on one end of the outlet water seal tank water inlet line close to the outlet water seal tank.

4. The gas cabinet inlet and outlet pipeline inspection and maintenance system according to claim 1 is characterized in that: An inlet water seal tank level gauge and an outlet water seal tank level gauge are respectively provided on the inlet water seal tank and the outlet water seal tank.

5. The gas cabinet inlet and outlet pipeline inspection and maintenance system according to claim 1 is characterized in that: The bottom of the inlet water seal tank is connected to the inlet water seal tank sewage line, and the bottom of the outlet water seal tank is connected to the outlet water seal tank sewage line.

6. The gas cabinet inlet and outlet pipeline inspection and maintenance system according to claim 1, characterized in that: The inlet water seal tank drain line is provided with an inlet water seal tank drain valve and an inlet water seal tank sight glass in sequence along the direction close to the inlet water seal tank; the outlet water seal tank drain line is provided with an outlet water seal tank drain valve and an outlet water seal tank sight glass in sequence along the direction close to the outlet water seal tank.