Chemical engineering utility service station pipe network structure

Abstract

The utility model relates to a kind of chemical public engineering service station pipe network structure, including vertical pipe, gate valve I, straight pipe I;The lower end of the vertical pipe is connected with the upper end of straight pipe I corresponding;Gate valve I is set at the connecting place of vertical pipe and straight pipe I;The pipe network structure further includes straight pipe II and prevents high-pressure string low-pressure device;The front end of the straight pipe II is connected with the lower end of straight pipe I corresponding;Prevent high-pressure string low-pressure device is set in the front area of straight pipe II.The utility model adds prevent high-pressure string low-pressure device, effectively solves the occurrence probability of high-pressure material reverse string into low-pressure public station pipe network pollution pipe network accident in the use of public engineering service station purging process, can substantially reduce the potential risk brought by pipe network pollution, to ensure the stable operation of entire public engineering system.

Description

Technical Field

[0001] This utility model relates to the field of public works service technology, and in particular to a pipeline structure for a chemical public works service station. Background Technology

[0002] In the field of public works services for chemical enterprises, the safe and efficient operation of public works service stations has always been a key concern for the industry.

[0003] Traditional public utility service stations have many drawbacks in design and use. The closest existing technology to this invention is a simplified setup where only a gate valve and a section of straight pipe are welded onto a vertical pipe. Figure 2 As shown. Under this traditional pipeline network structure, two major problems urgently need to be addressed: First, during purging operations at utility service stations, high-pressure materials are highly susceptible to backflow into the low-pressure utility station network. This not only contaminates the entire network but can also lead to a series of serious problems, such as affecting the normal operation of other equipment and increasing equipment maintenance costs. Second, after utility pipeline work is completed, high-pressure materials can backflow when disassembling pressurized hoses, posing a significant threat to the personal safety of operators. Such accidents often result in serious casualties and economic losses.

[0004] Currently, research in this field mainly focuses on how to optimize the layout of public utility pipeline networks and improve the stability of material transportation. However, there is still no comprehensive and effective solution to the specific problems that arise during the use of the aforementioned service stations. Summary of the Invention

[0005] To address the aforementioned problems, the purpose of this utility model is to provide a pipeline network structure for a chemical public works service station.

[0006] The technical solution adopted in this utility model is as follows: The present invention proposes a pipeline network structure for a chemical utility service station, comprising a vertical pipe, a gate valve I, and a straight pipe I; the lower end of the vertical pipe is connected to the upper end of the straight pipe I; the gate valve I is located at the connection between the vertical pipe and the straight pipe I; the pipeline network structure further includes a straight pipe II and a device for preventing high-pressure from entering low-pressure areas; the front end of the straight pipe II is connected to the lower end of the straight pipe I; the device for preventing high-pressure from entering low-pressure areas is located in the front region of the straight pipe II.

[0007] Furthermore, a gate valve II is provided in the rear region of the straight pipe II.

[0008] Furthermore, the pipeline structure also includes a pressure relief device; one end of the pressure relief device is connected to the pipeline between the high-pressure-to-low-pressure protection device and the gate valve II.

[0009] Furthermore, the device for preventing high-pressure from entering low-pressure systems is a one-way valve.

[0010] Furthermore, the nominal pressure range of the one-way valve is 1.6~10MPa, and the nominal diameter range is DN15~DN100.

[0011] Furthermore, the pressure relief device is a drain.

[0012] Furthermore, the diameter of the drain pipe ranges from DN10 to DN25. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the existing public service station's pipeline network structure.

[0014] In the attached drawings, the following labels are used: 1-vertical pipe; 2-gate valve I; 3-straight pipe I; 4-straight pipe II; 5-anti-high pressure-low pressure device; 6-gate valve II; 7-pressure relief device. Detailed Implementation

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] It should be noted that in the description of this utility model, the terms "upper", "lower", "top", "bottom", "one side", "the other side", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not mean that the device or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0017] See appendix Figure 1 The present invention proposes a pipeline network structure for a chemical utility service station, comprising a vertical pipe 1, a gate valve I2, and a straight pipe I3; the lower end of the vertical pipe 1 is connected to the upper end of the straight pipe I3; the gate valve I2 is installed at the connection between the vertical pipe 1 and the straight pipe I3.

[0018] The pipeline structure also includes a straight pipe II4 and a high-pressure to low-pressure protection device 5; the front end of the straight pipe II4 is connected to the lower end of the straight pipe I3; the high-pressure to low-pressure protection device 5 is installed in the front area of ​​the straight pipe II4.

[0019] The high-pressure to low-pressure protection device 5 is a one-way valve with a nominal pressure range of 1.6~10MPa and a nominal diameter range of DN15~DN100. Adding a one-way valve to the existing service station pipeline network serves as a high-pressure to low-pressure protection device, effectively preventing high-pressure materials from flowing back into the low-pressure utility station pipeline network during purging and other operations. The working principle of the one-way valve is based on its special internal valve disc structure. When high-pressure materials attempt to flow in the opposite direction, the valve disc automatically closes under pressure, thus preventing backflow.

[0020] In this embodiment, a gate valve II6 is provided in the rear region of the straight pipe II. The gate valve II6 acts as an isolation valve, which can completely cut off the flow of material in the pipeline when needed, providing safety assurance for subsequent operations such as connecting hoses. The rear region of the straight pipe II4 provides a suitable interface for hose connection, and the length of the hose connected to the rear of the straight pipe II4 is in the range of 200~500mm.

[0021] The pipeline structure also includes a pressure relief device 7; one end of the pressure relief device 7 is connected to the pipeline between the high-pressure-to-low-pressure protection device 5 and the gate valve II6.

[0022] The pressure relief device 7 is a drain, and the diameter of the drain pipe is DN10~DN25. The drain is connected to the safe discharge area through a specific pipe. When a pressure relief operation is required, the drain valve is opened, and the high-pressure material in the pipeline will be safely discharged through the drain pipe under the action of pressure difference, so as to avoid injury from high-pressure material.

[0023] Existing technologies only use simple gate valves and straight pipe connections as service stations, while this utility model, by adding a high-pressure-to-low-pressure protection device 5 and a pressure relief device 7, and by reasonably setting up isolation gate valves and straight pipe sections, forms a safer and more practical public utility service station pipeline system.

[0024] The core advantages of this utility model lie in "preventing high voltage from passing through to low voltage" and "safe pressure relief". The specific working process and component functions are as follows: (1) Preparation before the operation Confirm that drain 7 is in the off position to prevent media leakage; Connect the hose to the quick connector at the rear end of the straight pipe II6, and connect the other end of the hose to the drain or vent of the equipment to be operated. Confirm that the feed valve and discharge valve of the equipment to be operated are completely closed (no internal leakage) and that the equipment is isolated from the main process system.

[0025] (2) Operation process (taking purging as an example) Slowly open gate valve I2 and gate valve II6. The common medium (such as nitrogen) enters the equipment to be worked through vertical pipe 1 → gate valve I2 → straight pipe I3 ​​→ check valve 5 → straight pipe II4 → gate valve II6 → downstream straight pipe section → hose, thus achieving purging. If the feed / discharge valve of the equipment to be operated accidentally leaks internally, and the high-pressure material inside the equipment attempts to flow back into the service station, the valve disc of the one-way valve 5 will automatically close under high pressure to block the backflow of material and prevent contamination of the public main pipeline. During operation, gate valve II6 can adjust the medium flow rate as needed, or quickly shut off in an emergency, improving operational flexibility.

[0026] (3) Depressurization and disassembly after operation Close the hose valve at the end of the equipment to be operated, and then close gate valve I2 and gate valve II6 in sequence to cut off the supply of public works media; Open drain valve 7, then slowly open gate valve II6 to discharge the remaining medium and pressure in the hose through drain valve 7 to the safe recovery area until there is no residual pressure in the pipeline; After confirming that the pressure relief is complete, disconnect the quick connector and hose from the straight pipe end of gate valve II6 to complete the operation.

[0027] (4) Comparison of advantages Compared with traditional service stations, the core improvements and advantages of this utility model are shown in the table below:

[0028] Matters not covered in this utility model are all well-known technologies in the chemical industry (such as pipeline welding standards, valve installation specifications, etc.).

[0029] Matters not covered in this utility model are common knowledge.

[0030] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A chemical utility service station pipe network structure, comprising a vertical pipe, a gate valve I, a straight pipe I; the lower end of the vertical pipe is connected to the upper end of the straight pipe I; the gate valve I is arranged at the connection between the vertical pipe and the straight pipe I; characterized in that: The pipeline structure also includes a straight pipe II and a device to prevent high pressure from entering low pressure; the front end of the straight pipe II is connected to the lower end of the straight pipe I; the device to prevent high pressure from entering low pressure is located in the front area of ​​the straight pipe II.

2. A process plant utility station piping network according to claim 1, wherein: A gate valve II is installed in the rear region of the straight pipe II.

3. A chemical process utility service station piping network according to claim 2, characterized in that: The pipeline structure also includes a pressure relief device; one end of the pressure relief device is connected to the pipeline between the high-pressure-to-low-pressure protection device and the gate valve II.

4. A utility station piping network according to claim 1, wherein: The device for preventing high-pressure from crossing into low-pressure systems is a one-way valve.

5. A chemical process utility service station piping network according to claim 4, characterized in that: The nominal pressure range of the one-way valve is 1.6~10MPa, and the nominal diameter range is DN15~DN100.

6. The pipeline network structure of a chemical utility service station according to claim 3, characterized in that: The pressure relief device is a drain.

7. A chemical process utility service station piping network according to claim 6, characterized in that: The diameter range of the drain pipe is DN10~DN25.

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