Independent fire extinguishing system of non-ferrous metal rolling workshop

Abstract

The independent fire extinguishing system of the non-ferrous metal rolling workshop comprises a fire extinguishing storage tank, an electric control cabinet is arranged on the outer side of the fire extinguishing storage tank, a gas source main valve is arranged at a gas source outlet of the fire extinguishing storage tank, an outlet of the gas source main valve is connected with three gas outlet pipes through pipelines, and the three gas outlet pipes are each provided with a gas control plate gas source valve. Outlets of the three pneumatic control board gas source valves are connected with a first gas path pipeline, a second gas path pipeline and a third gas path pipeline respectively, the first gas path pipeline is communicated with the subarea gas paths of the subareas respectively, the second gas path pipeline is communicated with the subarea gas paths of the subareas respectively, and the third gas path pipeline is communicated with the subarea gas paths of the subareas respectively. The system adopts a new mode, each fire extinguishing area is provided with an independent fire extinguishing pipeline, the fire extinguishing pipeline of each area is independently connected into a low-pressure carbon dioxide storage tank, and carbon dioxide can be independently sprayed among the fire extinguishing areas without interference.

Description

Technical Field

[0001] This invention relates to the field of fire extinguishing systems for rolling mills, specifically an independent fire extinguishing system for non-ferrous metal rolling mills. Background Technology

[0002] With the development of the national economy and low-pressure carbon dioxide fire extinguishing technology, low-pressure carbon dioxide fire extinguishing systems are increasingly widely used in industries such as steel processing, non-ferrous metal processing, cement production lines, and automobile production lines, providing fire safety guarantees for various industrial production lines. However, the traditional carbon dioxide selector valve arrangement method has the following two problems affecting the application of low-pressure carbon dioxide fire extinguishing systems in many industries: (1) When the controller receives a second or more fire extinguishing signals, it is required to complete the fire extinguishing process of the first area first, and then proceed with the fire extinguishing process of the second area, and so on up to the fire extinguishing process of three or more fire extinguishing areas. That is, only one fire extinguishing area can be extinguished at a time. If a low-pressure carbon dioxide fire extinguishing time of 1 minute is set for each fire extinguishing area, then there will be at least a 1-minute fire extinguishing delay in the second fire extinguishing area. This increases the difficulty of fire fighting in the second fire extinguishing area and is likely to cause greater fire losses. Low-pressure carbon dioxide fire extinguishing is not allowed to be carried out simultaneously in two or more fire extinguishing areas. The reason is that there are shared pipes and valves at the front end of the fire extinguishing area selection valve. Since the number of fire areas is uncertain, the low-pressure carbon dioxide flow rate and low-pressure carbon dioxide pressure drop of the shared pipes are also uncertain. Thus, the low-pressure carbon dioxide pressure and specifications of the end nozzles of the fire extinguishing area are also uncertain. To ensure the reliability and accuracy of the low-pressure carbon dioxide fire extinguishing system, the piping design and fire extinguishing process are based on the assumption that low-pressure carbon dioxide is released in one fire extinguishing zone. Therefore, when multiple fire extinguishing zones are involved in a fire, the controller can only control one fire extinguishing zone at a time to extinguish the fire with low-pressure carbon dioxide. That is, the low-pressure carbon dioxide fire extinguishing is carried out in the order of the fire extinguishing zones.

[0003] (2) Each fire extinguishing zone shares a main control valve, leading to frequent opening and closing issues when multiple fire extinguishing zones release low-pressure carbon dioxide. For example... Figure 2 As shown, when using low-pressure carbon dioxide for fire suppression in Zone 1, the selector valve is opened first, followed by the main control valve. Once the extinguishing time is reached, the main control valve is closed first, and the selector valve is closed after a delay of approximately 5 seconds. If Zone 2 also requires low-pressure carbon dioxide fire suppression while Zone 1 is using it, the main control valve will need to be opened, closed, reopened, and closed repeatedly. Frequent opening and closing of the main control valve can easily lead to malfunctions and shorten its service life. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide an independent fire extinguishing system for non-ferrous metal rolling workshops, which can realize the simultaneous fire extinguishing of multiple fire extinguishing zones, that is, to open multiple selector valves at the same time to carry out low-pressure carbon dioxide fire extinguishing, meet the needs of multiple zones to carry out low-pressure carbon dioxide fire extinguishing at the same time, and can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an independent fire extinguishing system for a non-ferrous metal rolling workshop, comprising a fire extinguishing storage tank, an electrical control cabinet installed on the outside of the fire extinguishing storage tank, a main gas source valve installed at the gas source outlet of the fire extinguishing storage tank, the outlet of the main gas source valve connected to three gas outlet pipes via pipelines, each of the three gas outlet pipes being equipped with a gas control panel gas source valve, the outlets of the three gas control panel gas source valves being connected to a first gas path pipeline, a second gas path pipeline, and a third gas path pipeline respectively, the first gas path pipeline being connected to the zone gas path of zone I, the second gas path pipeline being connected to the zone gas path of zone I, and the third gas path pipeline being connected to the zone gas path of zone I respectively, each zone gas path being equipped with a zone gas path main valve, a three-way electric ball valve, a selector valve, and a carbon dioxide nozzle.

[0006] As a preferred embodiment of the present invention, a three-way manual ball valve is also provided in the partitioned gas line.

[0007] As a preferred embodiment of the present invention, a filter is provided between the main valve of the partitioned air circuit and the three-way electric ball valve on the partitioned air circuit.

[0008] As a preferred embodiment of the present invention, a three-way solenoid valve and a mechanical delay device are respectively provided on the gas lines of the zones 1, 2, 3, 4, 5, and 6.

[0009] As a preferred embodiment of the present invention, the ends of the partitioned gas paths are respectively provided with needle valves and electric contact pressure gauges.

[0010] As a preferred embodiment of the present invention, the inlet of the fire extinguishing storage tank is provided with a pre-charge valve.

[0011] As a preferred embodiment of the present invention, a pre-charge valve maintenance valve is provided on the pipeline between the pre-charge valve and the fire extinguishing storage tank.

[0012] Compared with existing technologies, the beneficial effects of this invention are as follows: This system adopts a novel approach, with each fire extinguishing zone having its own independent fire extinguishing pipeline. Each zone's fire extinguishing pipeline is independently connected to a low-pressure carbon dioxide storage tank, allowing each fire extinguishing zone to independently release carbon dioxide without interference. This arrangement enables simultaneous fire extinguishing in multiple zones, i.e., simultaneously opening multiple selector valves to initiate low-pressure carbon dioxide fire extinguishing in each zone, meeting the need for simultaneous low-pressure carbon dioxide fire extinguishing in multiple zones. Fire extinguishing control in each zone is simplified: each zone opens its selector valve to initiate low-pressure carbon dioxide fire extinguishing and closes the selector valve to stop low-pressure carbon dioxide fire extinguishing. Each zone has its own low-pressure carbon dioxide fire extinguishing time, fire start time, fire stop time, and fire duration. The main gas source valve does not need to be opened and closed repeatedly, reducing the frequency of main control valve switching and extending its service life. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a simplified structural diagram of the present invention; Figure 3 This is a schematic diagram of an existing fire suppression system.

[0014] In the diagram: 1 Fire extinguishing tank, 2 Electrical control cabinet, 3 Main gas valve, 4 Gas control panel gas valve, 5 First gas line pipeline, 6 Second gas line pipeline, 7 Third gas line pipeline, 8 Zone gas line, 9 Zone gas line main valve, 10 Three-way electric ball valve, 11 Three-way manual ball valve, 12 Selector valve, 13 Quick exhaust valve, 14 Three-way solenoid valve, 15 Filter, 16 Mechanical delay device, 17 Needle valve, 18 Electrical contact pressure gauge, 19 Pre-charge valve, 20 Pre-charge valve maintenance valve. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figure 1-2This invention provides a technical solution: an independent fire extinguishing system for a non-ferrous metal rolling mill, comprising a fire extinguishing tank 1. An electrical control cabinet 2 is installed on the outside of the fire extinguishing tank 1, used to control the switching of various electrical control valves, pressure gauges, sensor components, etc. The fire extinguishing tank 1 has a main air source valve 3 at its air source outlet. The outlet of the main air source valve 3 is connected to three air outlet pipes via pipelines. Each of the three air outlet pipes is equipped with a pneumatic control panel air source valve 4. The outlets of the three pneumatic control panel air source valves 4 are respectively connected to a first air path pipeline 5, a second air path pipeline 6, and a third air path pipeline 7. The first air path pipeline 5 connects to the zone air paths 8 of zones 1-3, the second air path pipeline 6 connects to the zone air paths 8 of zones 4-6, and the third air path pipeline 7 connects to the zone air paths 8 of zones 7-8. Zones 1-8 are respectively the No. 1 rolling mill body, the No. 1 rolling mill plate passage, the No. 1 rolling mill basement, the No. 2 rolling mill body, the No. 2 rolling mill plate passage, the No. 2 rolling mill basement, the all-oil room, and the scrubbing tower. Each zone's gas path 8 is equipped with a zone gas path main valve 9, a three-way electric ball valve 10, a selector valve 12, and a carbon dioxide nozzle. During standby, the main gas source valve 3, the gas source valve 4 on the gas control panel, and the zone gas path main valve 9 remain normally open. When a fire occurs in a certain area, the system controls the corresponding zone's three-way electric ball valve 10 and selector valve 12 via the electrical control cabinet 2. The three-way electric ball valve 10 opens, and low-pressure carbon dioxide gas passes sequentially through the three-way electric ball valve 10 and selector valve 12, reaching the carbon dioxide nozzle to release the carbon dioxide extinguishing agent pressure to extinguish the fire in the affected area. The gas pipeline is divided into three sections, corresponding to the No. 1 rolling mill workshop, the No. 2 rolling mill workshop, and the auxiliary workshop. When a workshop is not involved in production or maintenance, the corresponding gas source valve 4 on the gas control panel can be closed to prevent accidental carbon dioxide spraying that could injure workers during maintenance.

[0017] This system employs a novel approach, with each fire suppression zone having its own independent fire suppression pipeline. Each zone's fire suppression pipeline is independently connected to a low-pressure carbon dioxide storage tank, allowing for independent carbon dioxide release between fire suppression zones without interference. This arrangement enables simultaneous fire suppression in multiple zones, meaning multiple selector valves 12 can be opened simultaneously to initiate low-pressure carbon dioxide fire suppression, meeting the needs of simultaneous low-pressure carbon dioxide fire suppression in multiple zones. Fire suppression control in each zone is simplified: each zone opens its selector valve to initiate low-pressure carbon dioxide fire suppression and closes the selector valve to stop low-pressure carbon dioxide fire suppression. Each zone has its own low-pressure carbon dioxide fire suppression time, fire suppression start time, fire suppression stop time, and fire suppression duration. The main gas source valve 3 does not require repeated opening and closing, reducing the frequency of main control valve switching and extending its service life.

[0018] In a preferred embodiment, the partition gas path 8 is further equipped with a three-way manual ball valve 11. The three-way manual ball valve 11 and the three-way electric ball valve 10 are connected in parallel for manual fire extinguishing. When a fire occurs in a certain area and manual fire extinguishing is required, the staff in the area can immediately manually open the three-way manual ball valve 11. Carbon dioxide gas passes through the three-way manual ball valve 11 and the selector valve 12, and reaches the carbon dioxide nozzle to release the carbon dioxide extinguishing agent pressure to extinguish the fire in the fire area.

[0019] In the preferred technical solution, a filter 15 is provided between the main gas valve 9 and the three-way electric ball valve 10 on the zoned gas path 8. This filter can effectively filter impurities in the low-pressure carbon dioxide gas, preventing impurities from clogging the three-way electric ball valve, selector valve, and carbon dioxide nozzle. This ensures unobstructed fire extinguishing pipelines and sensitive valve operation, ensuring that the corresponding area can quickly and accurately release extinguishing agent during a fire. It also reduces component wear and further extends the service life of key system components.

[0020] In the preferred technical solution, the zoned gas lines 8 of zones 2, 3, 5, 6 and 7 are respectively equipped with three-way solenoid valves 14 and mechanical delayers 16, which can accurately control the start and stop of fire extinguishing and the timing of discharge in these specific areas. The mechanical delay enables delayed fire extinguishing, which is suitable for the needs of scenarios such as partition walls and basements. It can avoid the risk of accidental discharge and ensure the rationality of fire extinguishing response.

[0021] In the preferred technical solution, the end of the partitioned gas path 8 is respectively equipped with a needle valve 17 and an electric contact pressure gauge 18. The electric contact pressure gauge 18 can monitor the pipeline pressure status in real time and promptly report any pressure abnormalities. The needle valve 17 has a precision adjustment function and can safely open a small detection flow path without operating the main valve or affecting the overall standby state of the system. Together with the electric contact pressure gauge 18, it can quickly confirm whether the gas source pressure is within the normal range, effectively ensuring the safety of the monitoring operation.

[0022] In a preferred embodiment, the inlet of the fire extinguishing tank 1 is equipped with a pre-charge valve 19 for pre-charging low-pressure carbon dioxide extinguishing agent into the fire extinguishing tank 1. A pre-charge valve maintenance valve 20 is installed on the pipeline between the pre-charge valve 19 and the fire extinguishing tank 1. The pre-charge valve maintenance valve 20 can isolate the fire extinguishing tank 1 from the pre-charge pipeline during maintenance of the pre-charge valve 19, avoiding media leakage or abnormal system pressure during maintenance, and simplifying the maintenance process of pre-charge related components.

[0023] Optionally, the selector valve 12 is a selector valve with a selector valve cylinder. The selector valve cylinder is connected to the quick-release valve 13 via a gas pipeline. The quick-release valve 13 is used to quickly discharge the carbon dioxide gas in the selector valve cylinder. The carbon dioxide driving gas reaches the selector valve cylinder 9 through the opened three-way electric ball valve 10 or three-way manual ball valve 11, driving the selector valve 12 to open. The opened selector valve 12 allows the extinguishing agent in the low-pressure carbon dioxide storage tank to be released into the fire area through pipelines and nozzles to extinguish the fire. When the extinguishing delay time set in the program is reached, the three-way electric ball valve 10 is automatically de-energized and reversed, or the three-way manual ball valve 11 is manually closed. The carbon dioxide driving gas in the selector valve cylinder is released into the atmosphere through the quick-release valve 13, and the selector valve 12 automatically closes, stopping the carbon dioxide extinguishing. During maintenance, the quick-release valve 13 can quickly release the residual carbon dioxide in the pipeline. With the main gas valve 3 closed, neither the fire signal from the automatic control system nor the activation of the manual control button can pneumatically open the selector valve 12, thus ensuring the safety of personnel in the maintenance area.

[0024] The three-way electric ball valve 10, three-way solenoid valve 14, and electric contact pressure gauge 18 used in this application are all commonly used electronic components in the prior art. Their specific structures, working principles, control methods, and circuit connections are all known technologies and will not be described in detail here. Similarly, the valves used in this application are all commonly used valve assemblies in the prior art. Their specific structures and working principles are all known technologies and will not be described in detail here.

[0025] All parts not disclosed in this invention are prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An independent fire extinguishing system for a non-ferrous metal rolling mill, comprising a fire extinguishing storage tank (1), characterized in that: An electrical control cabinet (2) is installed on the outside of the fire extinguishing tank (1). A main gas valve (3) is installed at the gas source outlet of the fire extinguishing tank (1). The outlet of the main gas valve (3) is connected to three gas outlet pipes through pipelines. A gas control plate gas source valve (4) is installed on each of the three gas outlet pipes. The outlets of the three gas control plate gas source valves (4) are connected to the first gas pipeline (5), the second gas pipeline (6), and the third gas pipeline (7), respectively. The first gas pipeline (5) is connected to the zone gas pipelines (8) of zones 1-3, the second gas pipeline (6) is connected to the zone gas pipelines (8) of zones 4-6, and the third gas pipeline (7) is connected to the zone gas pipelines (8) of zones 7-8. Each zone gas pipeline (8) is equipped with a zone gas pipeline main valve (9), a three-way electric ball valve (10), a selector valve (12), and a carbon dioxide nozzle. The selector valve (12) is a selector valve with a selector valve cylinder. The selector valve cylinder is connected to the quick exhaust valve (13) through a gas pipeline.

2. The independent fire extinguishing system for a non-ferrous metal rolling mill according to claim 1, characterized in that: A three-way manual ball valve (11) is also installed on the partition gas path (8).

3. The independent fire extinguishing system for a non-ferrous metal rolling mill according to claim 1, characterized in that: A filter (15) is provided between the main gas valve (9) and the three-way electric ball valve (10) on the partition gas path (8).

4. An independent fire extinguishing system for a non-ferrous metal rolling mill according to claim 1, characterized in that: Three-way solenoid valves (14) and mechanical delayers (16) are respectively installed on the gas passages (8) of zones 2, 3, 5, 6 and 7.

5. An independent fire extinguishing system for a non-ferrous metal rolling mill according to claim 1, characterized in that: The ends of the partitioned gas path (8) are respectively equipped with needle valves (17) and electric contact pressure gauges (18).

6. An independent fire extinguishing system for a non-ferrous metal rolling mill according to claim 1, characterized in that: The fire extinguishing tank (1) is equipped with a pre-charge valve (19) at its inlet.

7. An independent fire extinguishing system for a non-ferrous metal rolling mill according to claim 6, characterized in that: A pre-charge valve maintenance valve (20) is installed on the pipeline between the pre-charge valve (19) and the fire extinguishing tank (1).

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