A fire extinguishing device for asphalt fume dust collection pipelines

Abstract

This utility model relates to the field of asphalt fume collection technology, and particularly to a fire extinguishing device for an asphalt fume dust collection pipeline. It includes a dust collection pipeline, a fire extinguishing pipe, and a bypass pipe. The fire extinguishing pipe is located on the right side of the dust collection pipeline, and a bypass pipe is located at the lower end of the fire extinguishing pipe. A first pneumatic valve is located at the upper end of the dust collection pipeline, and a second pneumatic valve is located at the lower end. The fire extinguishing pipe is connected to the dust collection pipeline. An outlet valve is located on the left side of the fire extinguishing pipe, and an inlet valve is located on the right side. A solenoid valve is located between the outlet valve and the inlet valve. A vent pipe is located between the outlet valve and the solenoid valve, and a vent valve is located on the vent pipe. The left side of the bypass pipe is located to the left of the outlet valve, and the right side of the bypass pipe is located to the left of the inlet valve. A bypass valve is located in the middle of the bypass pipe. In actual use, temperature is monitored by dual thermocouples, triggering the pneumatic valves to close both ends of the dust collection pipeline, blocking the spread of fire and oxygen supply. Simultaneously, the solenoid valve automatically opens to introduce steam for cooling and oxygen replacement to extinguish the fire.

Description

Technical Field

[0001] This utility model relates to the field of asphalt fume collection technology, and in particular to a fire extinguishing device for asphalt fume dust collection pipelines. Background Technology

[0002] In industries such as carbon, dust collectors are widely used to collect asphalt fumes. The safe operation of the dust collection pipelines that transport asphalt fumes is crucial. Because asphalt fumes have high temperatures and can burn inside the dust collection pipelines, fires in the pipelines need to be extinguished promptly. The existing fire extinguishing method involves connecting a fire extinguishing pipe to one end of the dust collection pipeline, which is connected to a steam pipeline. A single manual valve is installed on the fire extinguishing pipe. When a fire breaks out in the dust collection pipeline, workers open the valve to introduce cooling steam into the pipeline to extinguish the fire. In this method, because the steam pipeline is always under high pressure, and one end of the valve is in a high-temperature environment while the other end is in a low-temperature environment, the valve's material properties, sealing performance, and structural stability are significantly affected when operating in environments where high and low temperatures alternate or coexist. This can easily damage the valve structure and make it difficult to ensure the steam seal. If steam leaks into the dust collection pipeline during the asphalt fumes collection process, it will affect the collection quality. Utility Model Content

[0003] In view of the technical problems existing in the background art, the purpose of this utility model is to provide a fire extinguishing device for asphalt flue gas dust collection pipeline. The device is designed with multiple structures to increase the sealing of the steam pipeline and to make it easier to extinguish fires in the dust collection pipeline.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows: A fire extinguishing device for an asphalt fume dust collection pipeline includes a dust collection pipeline and a fire extinguishing pipe. The fire extinguishing pipe is located on the right side of the dust collection pipeline. Several pneumatic valves are installed on the dust collection pipeline. The fire extinguishing pipe is connected to the dust collection pipeline. An outlet valve is installed on the left side of the fire extinguishing pipe, and an inlet valve is installed on the right side of the fire extinguishing pipe. A solenoid valve is installed between the outlet valve and the inlet valve. A venting pipe is installed between the outlet valve and the solenoid valve, and a venting valve is installed on the venting pipe.

[0005] Preferably, the system also includes a bypass pipe, the two ends of which are connected to the fire extinguishing pipe. The left side of the bypass pipe is located to the left of the outlet valve, the right side of the bypass pipe is located to the left of the inlet valve, and a bypass valve is provided in the middle of the bypass pipe.

[0006] Preferably, a first pneumatic valve is provided at the upper end of the dust collection pipe, and a second pneumatic valve is provided at the lower end of the dust collection pipe.

[0007] Preferably, two sets of temperature measuring thermocouples are installed at the upper end of the dust collection pipe, and the two sets of temperature measuring thermocouples are located at the lower end of the first pneumatic valve.

[0008] Preferably, the two sets of temperature measuring thermocouples are fixed on both sides of the inner wall of the dust collection pipe.

[0009] Preferably, the solenoid valve is normally closed when not in use, the first pneumatic valve, the second pneumatic valve, the outlet valve, and the inlet valve are normally open, and the bypass valve and the vent valve are normally closed.

[0010] Preferably, the connection points between the bypass pipe and the fire extinguishing pipe on both sides are seamlessly welded.

[0011] As a preferred option, the vent pipe and the fire extinguishing pipe are connected.

[0012] This utility model has the following advantages and beneficial effects: 1. The fire extinguishing pipe is connected to the dust collection pipe. The fire extinguishing pipe is equipped with an inlet valve and an outlet valve, which are spaced apart. When no fire occurs, the outlet valve only comes into contact with the high temperature inside the dust collection pipe, and the inlet valve only comes into contact with the low temperature inside the steam pipe. This avoids large temperature changes on both sides of a single valve, protects the quality of the valve, and also ensures the sealing of the steam to prevent steam leakage during the dust collection process.

[0013] Second, a bypass pipe and bypass valve were designed. When the solenoid valve fails, the bypass valve can be manually opened to directly introduce the fire extinguishing medium, bypassing the faulty component to achieve emergency fire extinguishing. This ensures the reliability of the fire protection function and avoids the risk of single-path failure. Attached Figure Description

[0014] Figure 1 This is a structural diagram of a fire extinguishing device for an asphalt fume dust collection pipeline proposed in this utility model; Figure 2 This is a cross-sectional structural diagram of a fire extinguishing device for asphalt flue gas dust collection pipeline proposed in this utility model. Figure 3 This is a front view of a fire extinguishing device for asphalt fume dust collection pipelines proposed in this utility model.

[0015] Attached reference numerals: 1-Dust collection pipe, 11-First pneumatic valve, 12-Second pneumatic valve, 13-Thermocouple, 2-Fire extinguishing pipe, 21-Outlet valve, 22-Inlet valve, 23-Solenoid valve, 3-Drain pipe, 31-Drain valve, 4-Bypass pipe, 41-Bypass valve. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0018] Example like Figures 1-3 As shown, a fire extinguishing device for an asphalt fume dust collection pipeline includes a dust collection pipeline 1, a fire extinguishing pipe 2, and a bypass pipe 4. The fire extinguishing pipe 2 is located on the right side of the dust collection pipeline 1, and the bypass pipe 4 is located at the lower end of the fire extinguishing pipe 2. A first pneumatic valve 11 is located at the upper end of the dust collection pipeline 1, and a second pneumatic valve 12 is located at the lower end of the dust collection pipeline 1. The fire extinguishing pipe 2 is connected to the dust collection pipeline 1. An outlet valve 21 is located on the left side of the fire extinguishing pipe 2, and an inlet valve 22 is located on the right side of the fire extinguishing pipe 2. The outlet valve 21 and the inlet valve 22 are connected. A solenoid valve 23 is installed between outlet valve 21 and solenoid valve 23. An exhaust pipe 3 is installed between outlet valve 21 and solenoid valve 23. An exhaust valve 31 is installed on exhaust pipe 3. One end of bypass pipe 4 is connected between outlet valve 21 and dust collection pipe 1. The other end of bypass pipe 4 is connected between inlet valve 22 and solenoid valve 23. Both ends of bypass pipe 4 are connected to fire extinguishing pipe 2. The left side of bypass pipe 4 is located to the left of outlet valve 21. The right side of bypass pipe 4 is located to the left of inlet valve 22. A bypass valve 41 is installed in the middle of bypass pipe 4.

[0019] like Figures 1-3 As shown, two sets of temperature-sensing thermocouples 13 are installed at the upper end of the dust collection pipe 1. The two sets of temperature-sensing thermocouples 13 are located at the lower end of the first pneumatic valve 11. The two sets of temperature-sensing thermocouples 13 are fixed on both sides of the inner wall of the dust collection pipe 1. Only when both sets of thermocouples detect that the temperature reaches the set alarm value at the same time will the over-temperature alarm and fire extinguishing action be triggered. Over-temperature of a single set will only prompt on-site inspection, avoiding false alarms caused by a single sensor and improving the reliability of the system.

[0020] like Figures 1-3As shown, solenoid valve 23 is normally closed when not in use, while the first pneumatic valve 11, the second pneumatic valve 12, the outlet valve 21, and the inlet valve 22 are normally open. The bypass valve 41 and the vent valve 31 are normally closed. During normal operation, solenoid valve 23 prevents steam leakage, ensuring that the dust collection pipeline 1 is free from external media interference. It only opens when both thermocouples 13 simultaneously trigger an over-temperature alarm, quickly introducing steam for fire extinguishing, achieving automated triggering and avoiding the problem of delayed manual intervention. The first and second pneumatic valves 11 and 12 maintain unobstructed pipeline flow during normal operation; they close simultaneously upon triggering an over-temperature alarm, cutting off airflow at both ends of the pipeline, blocking the flame spread path and oxygen supply, forming physical isolation, preventing the fire from spreading, and solving the safety hazard of traditional devices being unable to quickly block the fire source. The normally open design of outlet valve 21 and inlet valve 22 reduces pipeline resistance and facilitates daily maintenance. In case of malfunction, they can be manually closed for isolation and repair, reducing the installation and maintenance costs associated with complex pipeline designs. The purpose of bypass valve 41 is to allow manual opening to directly introduce steam for fire extinguishing in the event of failure of solenoid valve 23 or the automatic control system. This redundant design avoids fire extinguishing failure due to a single-path malfunction, improves system reliability, and addresses the lack of emergency measures in traditional systems. Vent valve 31 is a manual switch for the test path; it is closed by default to prevent steam leakage.

[0021] The bypass pipe 4 is seamlessly welded to the fire extinguishing pipe 2 on both sides. The welded connection forms an integrated structure with the pipeline, which can ensure the negative pressure environment and pressure impact of the steam medium in the dust collection pipe 1.

[0022] When using the fire extinguishing device for the asphalt fume dust collection duct 1, first confirm that the first pneumatic valve 11, the second pneumatic valve 12, the inlet valve 22, and the outlet valve 21 are in the normally open state, and the bypass valve 41, the vent valve 31, and the solenoid valve 23 are in the normally closed state, to ensure that the dust collection duct 1 and the fire extinguishing pipe 2 are unobstructed and there is no risk of steam leakage.

[0023] If the automatic device fails due to jamming of the solenoid valve 23 or malfunction of the control system, the bypass valve 41 can be manually opened at the bypass pipe 4 immediately to directly connect the main steam pipeline and the fire extinguishing pipe 2, bypassing the faulty solenoid valve 23 assembly, so that the steam can be injected into the dust collection pipeline 1 through the bypass pipe 4 to extinguish the fire; thus completing the use of the fire extinguishing device for the asphalt fume dust collection pipeline 1.

[0024] During operation, asphalt fumes enter from the lower end of dust collection pipe 1 and exit to the subsequent treatment system from the upper end. The first pneumatic valve 11 and the second pneumatic valve 12 on dust collection pipe 1 remain open during normal operation and close simultaneously upon triggering an over-temperature alarm. Temperature-measuring thermocouple 13 monitors the pipe temperature in real time, sets an alarm threshold, and triggers an alarm simultaneously with both thermocouples to avoid false alarms or missed alarms from a single sensor, ensuring accurate temperature signals. Inlet valve 22 and outlet valve 21 remain open during normal operation and connect to the steam pipe and dust collection pipe 1 via fire extinguishing pipe 2. Solenoid valve 23 automatically opens upon receiving an over-temperature alarm signal. The system releases steam into the dust collection pipe 1, extinguishing the fire through the dual effects of cooling steam vaporization absorbing heat and replacing oxygen to isolate the combustion-supporting agent. The bypass pipe 4 and bypass valve 41 are normally closed, but can be manually opened if the automatic device fails. When the solenoid valve 23 or the automatic control system malfunctions, steam can be directly introduced to extinguish the fire by manually opening the bypass valve 41, preventing the fire from getting out of control due to the failure of the automatic device. The vent pipe 3 and vent valve 31 are used to close the outlet valve 21 and open the vent valve 31 and solenoid valve 23 during periodic testing to check whether the steam passage is unobstructed and whether the valve action is sensitive, preventing valve jamming or leakage caused by long-term idleness.

[0025] This is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fire extinguishing device for asphalt fume dust collection pipelines, characterized in that: It includes a dust collection pipe and a fire extinguishing pipe connected to the dust collection pipe. The dust collection pipe is equipped with several pneumatic valves, and the fire extinguishing pipe is located between two adjacent pneumatic valves. The fire extinguishing pipe is equipped with an outlet valve, a solenoid valve, and an inlet valve in sequence. The outlet valve is located at one end near the dust collection pipe. An exhaust pipe is provided between the outlet valve and the solenoid valve, and an exhaust valve is provided on the exhaust pipe.

2. A fire extinguishing device for asphalt fume dust collection pipelines according to claim 1, characterized in that: It also includes a bypass pipe, both ends of which are connected to the fire extinguishing pipe. One end of the bypass pipe is connected between the outlet valve and the dust collection pipe, and the other end of the bypass pipe is connected between the inlet valve and the solenoid valve. A bypass valve is installed in the middle of the bypass pipe.

3. A fire extinguishing device for asphalt fume dust collection pipelines according to claim 2, characterized in that: A first pneumatic valve is installed at the upper end of the dust collection pipe, and a second pneumatic valve is installed at the lower end of the dust collection pipe.

4. A fire extinguishing device for asphalt fume dust collection pipelines according to claim 3, characterized in that: The inner wall of the dust collection pipe is equipped with two sets of temperature measuring thermocouples, which are located between the first pneumatic valve and the second pneumatic valve.

5. A fire extinguishing device for asphalt fume dust collection pipelines according to claim 4, characterized in that: The two sets of temperature measuring thermocouples are fixed on both sides of the inner wall of the dust collection pipe.

6. A fire extinguishing device for asphalt fume dust collection pipelines according to claim 3, characterized in that: The solenoid valve is normally closed when not in use, the first pneumatic valve, the second pneumatic valve, the outlet valve, and the inlet valve are normally open, and the bypass valve and the vent valve are normally closed.

7. A fire extinguishing device for asphalt fume dust collection pipelines according to claim 2, characterized in that: The bypass pipe is seamlessly welded to the fire extinguishing pipe on both sides.

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