Passive temperature control redundant start control system of low-pressure carbon dioxide fire extinguishing system
By setting a manual or passive temperature-controlled three-way valve in the fire extinguishing area and controlling it in parallel with the low-pressure carbon dioxide storage tank area, and using a memory alloy spring to detect temperature changes, the problem of automatic start-up failure of the low-pressure carbon dioxide fire extinguishing system is solved, achieving rapid startup and avoiding fire delays.
Patent Information
- Application Number
- CN202422098085.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-28
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-08-28
AI Technical Summary
When the existing low-pressure carbon dioxide fire extinguishing system fails to start automatically, it cannot be quickly started manually or automatically, resulting in the fire not being extinguished in time, causing equipment damage and economic losses.
A manual three-way valve or a passive temperature-controlled three-way valve is installed at the fire extinguishing area, and is controlled in parallel with the electric three-way valve in the low-pressure carbon dioxide storage tank area through the gas pipeline to achieve fast manual or automatic start-up, and the memory alloy spring is used to detect temperature changes and drive the valve core to move.
In the event that the existing automatic start fails, the low-pressure carbon dioxide fire extinguishing system can be quickly started manually or automatically to avoid missing the best fire extinguishing time, protect equipment from damage, and reduce economic losses.
Smart Images
Figure CN223336671U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of start-up control of a low-pressure carbon dioxide fire extinguishing system for nonferrous metal rolling, in particular to a passive temperature control redundant start-up control system for the low-pressure carbon dioxide fire extinguishing system. Background Art
[0002] During the rolling process of non-ferrous metal strip and foil, process lubricants are required to clean surface dirt, cool the sheet, and control surface ripples. These lubricants are typically kerosene-based with a small amount of additives. During the rolling process, lubricant volatilization produces a large amount of oil mist. High concentrations of oil mist can easily cause fires due to mechanical overheating, static electricity accumulation, sparks from strip breakage, and high strip temperatures. Therefore, rolling mill systems must be equipped with either low-pressure or high-pressure carbon dioxide fire extinguishing systems. Usually, the storage tank and the starting control system of the low-pressure carbon dioxide fire extinguishing system are set together and arranged in the low-pressure carbon dioxide storage area; the starting control system has two control methods. One is that the smoke sensors and temperature sensors installed on-site in the fire extinguishing area detect whether a fire occurs in the fire extinguishing area, and the starting control system automatically controls the starting of the low-pressure carbon dioxide fire extinguishing system according to the sensor detection signal; the other is to manually open the low-pressure carbon dioxide fire extinguishing system through the manual three-way valve set in the starting control system of the low-pressure carbon dioxide storage area when the smoke sensor and the temperature sensor fail (such as the smoke sensor and the temperature sensor are powered off, or the starting control system is powered off, or the communication between the sensor and the starting control system is interrupted).
[0003] When a fire occurs, if the smoke sensor and temperature sensor fail, the on-site operator needs to run to the low-pressure carbon dioxide storage area to start the low-pressure carbon dioxide fire extinguishing system. Since the fire extinguishing area is far away from the low-pressure carbon dioxide storage area, it takes a long time for the on-site operator to run to the low-pressure carbon dioxide storage area. At the same time, after starting the low-pressure carbon dioxide fire extinguishing system, it takes about 3 seconds for the low-pressure carbon dioxide fire extinguishing system to spray carbon dioxide for fire extinguishing. Therefore, the best fire extinguishing time may be missed, causing some high-value components in the rolling mill equipment (such as plate rollers) to be damaged and scrapped, thereby causing huge economic losses to the company; therefore, when the existing automatic start-up of the low-pressure carbon dioxide fire extinguishing system fails, how to achieve rapid manual start-up or rapid automatic start-up is an important issue that needs to be improved in the low-pressure carbon dioxide fire extinguishing system. Utility Model Content
[0004] In order to overcome the shortcomings of the background technology, the utility model discloses a passive temperature-controlled redundant starting control system for a low-pressure carbon dioxide fire extinguishing system. By setting a manual three-way valve at the fire extinguishing area, or setting a passive temperature-controlled three-way valve at the fire extinguishing area, the purpose of quickly manually starting or automatically starting the low-pressure carbon dioxide fire extinguishing system is achieved when the existing automatic start fails.
[0005] In order to achieve the purpose of the utility model, the utility model adopts the following technical solution: a passive temperature control redundant starting control system for a low-pressure carbon dioxide fire extinguishing system, including a pneumatic air source main valve, an air control panel air source valve, a partitioned air circuit valve, a filter, an electric three-way valve, a manual three-way valve, a quick exhaust valve, and a selection cylinder; the pneumatic air source main valve, the air control panel air source valve, the partitioned air circuit valve, the filter, the electric three-way valve, the quick exhaust valve, and the selection cylinder are arranged in a low-pressure carbon dioxide storage tank area; the manual three-way valve is independently arranged at the fire extinguishing area site, and is connected in parallel control with the electric three-way valve arranged in the low-pressure carbon dioxide storage tank area through an air circuit pipeline.
[0006] Preferably, it also includes a passive temperature-controlled three-way valve; the pneumatic air source main valve, the air control panel air source valve, the partitioned air circuit valve, the filter, the electric three-way valve, the quick exhaust valve, and the selection cylinder are arranged in the low-pressure carbon dioxide storage tank area; the manual three-way valve and the passive temperature-controlled three-way valve are connected in parallel control and arranged at the fire extinguishing area, wherein the passive temperature-controlled three-way valve is arranged at the upper part of the fire extinguishing control area; the manual three-way valve and the passive temperature-controlled three-way valve are connected to the low-pressure carbon dioxide storage tank area through the air circuit pipeline.
[0007] Preferably, it also includes a passive temperature-controlled three-way valve; the pneumatic air source main valve, the air control panel air source valve, the partitioned air circuit valve, the filter, the electric three-way valve, the manual three-way valve, the quick exhaust valve, and the selection cylinder are arranged in the low-pressure carbon dioxide storage tank area; the passive temperature-controlled three-way valve is independently arranged at the fire extinguishing area site, located at the upper part of the fire extinguishing control area, and is connected in parallel control with the manual three-way valve arranged in the low-pressure carbon dioxide storage tank area through the air circuit pipeline.
[0008] Furthermore, the passive temperature-controlled three-way valve includes a three-way valve and a valve core control assembly, and the valve core control assembly is fixedly arranged at one end of the three-way valve; a valve core is movably arranged in the three-way valve, and the valve core and the valve core control assembly are both provided with permanent magnets. The valve core control assembly drives the valve core to move through the permanent magnet to control the switch of the passive temperature-controlled three-way valve.
[0009] Furthermore, a memory alloy spring is provided in the valve core control assembly. When the memory alloy spring detects changes in ambient temperature and deforms, it drives the permanent magnet in the valve core control assembly to move.
[0010] Furthermore, a heat insulation component is provided between the three-way valve and the valve core control assembly.
[0011] Furthermore, in the valve core control assembly, a heat insulation component is provided between the memory alloy spring and other components.
[0012] Due to the adoption of the technical solution as described above, the utility model has the following beneficial effects: the utility model discloses a passive temperature-controlled redundant starting control system for a low-pressure carbon dioxide fire extinguishing system, in which a manual three-way valve is set at the fire extinguishing area. When a fire occurs, the on-site operator can quickly start the low-pressure carbon dioxide fire extinguishing system through the manual three-way valve at the fire extinguishing area; or a passive temperature-controlled three-way valve is set at the fire extinguishing area, and the passive temperature-controlled three-way valve automatically detects the change in on-site temperature when a fire occurs, and automatically starts the low-pressure carbon dioxide fire extinguishing system; thereby achieving the technical effect of rapid manual start-up or rapid automatic start-up of the low-pressure carbon dioxide fire extinguishing system when the existing automatic start-up fails, thereby avoiding the huge economic losses to the enterprise caused by missing the best fire extinguishing time. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 Schematic diagram of the location of the start-up control system for the existing low-pressure carbon dioxide fire extinguishing system;
[0014] Figure 2 This is a schematic diagram of the location of the start-up control system of the low-pressure carbon dioxide fire extinguishing system in Example 1;
[0015] Figure 3 This is a schematic diagram of the location of the start-up control system of the low-pressure carbon dioxide fire extinguishing system in Example 2;
[0016] Figure 4 This is a schematic diagram of the location of the low-pressure carbon dioxide fire extinguishing system start-up control system of Example 3;
[0017] Figure 5 This is a schematic diagram of the structure of a passive temperature-controlled three-way valve;
[0018] Figure 6 Schematic diagram of the valve core assembly structure;
[0019] Figure 7 This is a schematic diagram of the valve core control component structure.
[0020] In the figure: 1. Pneumatic air source main valve; 2. Air control board air source valve; 3. Partitioned air circuit valve; 4. Filter; 5. Electric three-way valve; 6. Manual three-way valve; 7. Quick exhaust valve; 8. Selector cylinder; 9. Passive temperature control three-way valve; 9.1. Three-way valve; 9.1.1. Valve core; 9.1.2. Magnet seat; 9.1.3. Permanent magnet A; 9.2. Valve core control assembly; 9.2.1. Valve stem; 9.2.2. Valve stem isolation sleeve; 9.2.3. Permanent magnet B; 9.2.4. Valve stem sleeve; 9.2.5. Spring fixing plate; 9.2.6. Memory alloy spring; 9.2.7. Valve stem top plate. DETAILED DESCRIPTION
[0021] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.
[0022] See the instructions attached Figure 1 :The accompanying drawings show the principle and setting position of the starting control system of the existing low-pressure carbon dioxide fire extinguishing system. The starting control system is connected to the carbon dioxide low-pressure storage tank through a gas pipeline, and the low-pressure storage tank provides the starting control system with a working gas source; in the starting control system of the existing low-pressure carbon dioxide fire extinguishing system, it includes a pneumatic gas source main valve 1, a gas control board gas source valve 2, a partition gas circuit valve 3, a filter 4, an electric three-way valve 5, a manual three-way valve 6, a quick exhaust valve 7, and a selection cylinder 8; wherein the pneumatic gas source main valve 1 and the gas control board gas source valve 2 are connected in series to form a main control valve, which controls the switch of the low-pressure storage tank supplying gas to the starting control system. When the low-pressure carbon dioxide fire extinguishing system is on standby, the pneumatic gas source main valve 1 and the gas control board gas source valve 2 are both in the open state; wherein the partition gas circuit valve 3, the filter 4, the electric three-way valve 5, the manual three-way valve 6, the quick exhaust valve 7, and the selection cylinder 8 constitute a partition control system, and several sets of partition control systems are arranged in parallel at the rear end of the main control valve for respectively controlling the release of carbon dioxide in corresponding fire extinguishing areas; for example, in the appendix of the specification Figure 1 There are four zoning control systems, which respectively control the release of carbon dioxide from the rolling mill body area, plate filter area, process lubricating oil basement area, main ditch and thin oil lubrication basement area; in the zoning control system, the zoning air circuit valve 3 and the filter 4 are connected in series, the electric three-way valve 5 and the manual three-way valve 6 are controlled in parallel and connected between the filter 4 and the quick exhaust valve 7, and the selection cylinder 8 is connected to the rear end of the quick exhaust valve 7; the above-mentioned pneumatic air source main valve 1, air control panel air source valve 2, zoning air circuit valve 3, filter 4, electric three-way valve 5, manual three-way valve 6, quick exhaust valve 7 and selection cylinder 8 are all arranged in the low-pressure carbon dioxide storage tank area;
[0023] The operating principle of the activation control system of the low-pressure carbon dioxide fire extinguishing system is as follows: when a fire occurs in a certain area, the electric three-way valve 5 or the manual three-way valve 6 of the corresponding zone control system is activated, allowing carbon dioxide gas to enter the selection cylinder 8. The selection cylinder 8 is activated, driving the corresponding selection valve to open, so that the fire extinguishing pipe network in the fire area is connected to the low-pressure carbon dioxide storage tank, releasing carbon dioxide gas for fire extinguishing operations; the electric three-way valve 5 detects whether there is a fire signal at the fire extinguishing area through the smoke sensor and temperature sensor installed on the fire extinguishing area, and then automatically controls the activation of the electric three-way valve 5 through the electronic control system; the manual three-way valve 6 is a redundant backup of the electric three-way valve 5. When the control of the electric three-way valve 5 fails, the on-site operator manually activates the manual three-way valve 6 to ensure that the low-pressure carbon dioxide fire extinguishing system can be activated to extinguish the fire in the event of a fire.
[0024] The problems with the start-up control system of the existing low-pressure carbon dioxide fire extinguishing system are: 1. Once a power outage or communication interruption occurs, the smoke sensor, temperature sensor, electronic control system, and electric three-way valve 5 may all fail, resulting in the failure of the automatic start-up of the low-pressure carbon dioxide fire extinguishing system; 2. The installation location of the manual three-way valve 6 is too far away from the on-site operator. When a fire occurs and the automatic start-up of the low-pressure carbon dioxide fire extinguishing system fails, the operator has to run to the manual three-way valve 6, which takes too long to manually operate, and it is easy to miss the best time to extinguish the fire. Example 1:
[0025] See the instructions attached Figure 2 : In this embodiment, the manual three-way valve 6 of the partition control system is independently set at the fire extinguishing area site, and is connected in parallel control with the electric three-way valve 5 set in the low-pressure carbon dioxide storage tank area through an air pipeline; after the manual three-way valve 6 is set at the fire extinguishing area site, if a fire occurs and the smoke sensor, temperature sensor, electronic control system, and electric three-way valve 5 fail, the on-site operator can start the low-pressure carbon dioxide fire extinguishing system directly by operating the manual three-way valve 6 at the site in the shortest time, greatly shortening the time for manually starting the low-pressure carbon dioxide fire extinguishing system, thereby avoiding the huge economic losses to the enterprise caused by missing the best fire extinguishing time. Example 2:
[0026] See the instructions attached Figure 3 : In this embodiment, a passive temperature-controlled three-way valve 9 is added to the startup control system to form a passive temperature-controlled redundant startup control system; wherein the passive temperature-controlled three-way valve 9 is independently arranged at the fire extinguishing area, located at the upper part of the fire extinguishing control area, and is connected in parallel control with the manual three-way valve 6 arranged in the low-pressure carbon dioxide storage tank area through an air pipeline; when a fire occurs, when the smoke sensor, temperature sensor, electronic control system, and electric three-way valve 5 fail in the case of power failure, the passive temperature-controlled three-way valve 9 can still function without relying on power supply, and detects the on-site temperature through a memory alloy spring. When the on-site temperature reaches the set value, the memory alloy spring deforms and drives the passive temperature-controlled three-way valve 9 to operate, thereby ensuring that the low-pressure carbon dioxide fire extinguishing system can still achieve automatic startup control in the absence of electricity, realizing passive temperature control redundant backup of the startup control system, and avoiding missing the best fire extinguishing time and causing huge economic losses to the enterprise;
[0027] The structure of the passive temperature control three-way valve 9 is shown in the appendix of the manual. Figure 5 、 6 7: Passive temperature-controlled three-way valve 9 comprises three-way valve 9.1, valve core control assembly 9.2, and heat shield 9.3. It should be noted that when three-way valve 9.1 is in operation, a carbon dioxide gas-liquid mixture at a temperature of -18°C to -20°C flows through it. The function of heat shield 9.3 is to prevent the low temperature of the carbon dioxide gas-liquid mixture from affecting the memory alloy springs 9.2.6.
[0028] A valve core 9.1.1 is slidably mounted within the three-way valve 9.1. When the valve core 9.1.1 slides, it changes the gas passageway of the three-way valve 9.1, controlling whether the gas passageway is open or closed. A magnet seat 9.1.2 is fixedly mounted on the outer end of the valve core 9.1.1. The magnet seat 9.1.2 is basin-shaped, and an annular permanent magnet A9.1.3 is fixedly mounted on the upper end.
[0029] The valve core control assembly 9.2 includes the valve stem 9.2.1, the valve stem isolation sleeve 9.2.2, the permanent magnet B9.2.3, the valve stem sleeve 9.2.4, the spring fixing plate 9.2.5, the memory alloy spring 9.2.6, and the valve stem top plate 9.2.7. The permanent magnet B9.2.3 is annular and fixedly installed at the lower end of the valve stem 9.2.1. The valve stem isolation sleeve 9.2.2 consists of an upper flange and a lower thin-walled isolation sleeve (stamping part), which are connected by welding. The outside of the thin-walled isolation sleeve is coated with thermal insulation coating. ; The valve stem sleeve 9.2.4 is fixedly arranged in the middle of the upper flange of the valve stem isolation sleeve 9.2.2; the permanent magnet B9.2.3 is movably arranged in the cavity of the thin-wall isolation sleeve, the valve stem 9.2.1 extends to the upper part through the valve stem sleeve 9.2.4, and an insulation sleeve is provided between the valve stem 9.2.1 and the valve stem sleeve 9.2.4; the memory alloy spring 9.2.6 is bent at both ends with a spring fixing head; a spring clamping groove is provided on one end face of the spring fixing plate 9.2.5, and the spring fixing plate 9.2.5 is clamped with a spring The groove is fixed to the upper end face of the upper flange of the valve stem isolation sleeve 9.2.2 by bolts in a downward direction, and a heat insulation pad is provided between the spring fixing plate 9.2.5 and the upper end face of the flange; the memory alloy spring 9.2.6 is sleeved on the outer cylindrical surface of the upper part of the valve stem 9.2.1, and the spring fixing head at the lower end of the memory alloy spring 9.2.6 is provided in the spring clamping groove of the spring fixing plate 9.2.5 to achieve a fixed connection with the spring fixing plate 9.2.5; the valve stem top plate 9.2.7 is fixed by a nut At the upper end of the valve stem 9.2.1, a spring fixing plate 9.2.5 is fixed to the lower end of the valve stem top plate 9.2.7 by bolts. A thermal insulation pad is provided between the spring fixing plate 9.2.5 and the valve stem top plate 9.2.7. A spring retaining groove is provided on the end surface of the spring fixing plate 9.2.5 facing the valve stem top plate 9.2.7. The spring fixing head at the upper end of the memory alloy spring 9.2.6 is set in the spring retaining groove of the spring fixing plate 9.2.5 to achieve a fixed connection with the spring fixing plate 9.2.5.
[0030] The valve core control assembly 9.2 is fixedly mounted on the upper end of the three-way valve 9.1, and the two are separated by a heat insulation plate 9.3. The permanent magnet B 9.2.3 in the valve core control assembly 9.2 is connected to the permanent magnet A 9.1.3 on the upper portion of the valve core 9.1.1 via magnetic coupling transmission. The structure that transmits power through magnetic coupling isolates the valve stem 9.2.1 and permanent magnet B 9.2.3 in the valve core control assembly 9.2 from the valve core 9.1.1, preventing heat transfer between them.
[0031] When the passive temperature-controlled three-way valve 9 is in the closed state, the memory alloy spring 9.2.6 is provided with a pre-tension. This pre-tension causes the permanent magnet B 9.2.3 to be located at the bottom of the thin-walled isolation sleeve through the valve stem 9.2.1. The permanent magnet B 9.2.3 is magnetically coupled with the permanent magnet A 9.1.3, causing the valve core 9.1.1 of the three-way valve 9.1 to be in the closed position.
[0032] When passive temperature-controlled three-way valve 9 is operating, memory alloy spring 9.2.6 detects the ambient temperature. When the ambient temperature reaches or exceeds the operating temperature set by memory alloy spring 9.2.6, memory alloy spring 9.2.6 elastically deforms and elongates, driving permanent magnet B 9.2.3 upward. Permanent magnet B 9.2.3, coupled with permanent magnet A 9.1.3, drives valve core 9.1.1 upward, causing passive temperature-controlled three-way valve 9 to open. Therefore, in the event of a power outage in the startup control system of the low-pressure carbon dioxide fire extinguishing system, passive temperature-controlled three-way valve 9 can continue to function independently of the power supply, providing passive temperature control redundancy for the startup control system.
[0033] When the passive temperature-controlled three-way valve 9 is operating, the carbon dioxide gas-liquid mixture flowing through the three-way valve 9.1 is at an extremely low temperature. When this low temperature is transferred to the memory alloy spring 9.2.6, it causes the memory alloy spring 9.2.6 to contract, causing the passive temperature-controlled three-way valve 9 to close again (in a low-temperature carbon dioxide fire-extinguishing system, the carbon dioxide storage tank is allowed to close after it has been opened). The valve stem 9.2.1, the isolation structure between the permanent magnet B 9.2.3 and the valve core 9.1.1, and the thermal insulation pad provided in the passive temperature-controlled three-way valve 9 all prevent the low temperature generated by the three-way valve 9.1 from being transferred to the memory alloy spring 9.2.6 during operation, thereby ensuring that the passive temperature-controlled three-way valve 9 remains open during operation and that fires can be fully extinguished. Example 3:
[0034] See the instructions attached Figure 4 : In this embodiment, the manual three-way valve 6 and the passive temperature-controlled three-way valve 9 are arranged at the fire extinguishing area, connected in parallel control, and connected to the low-pressure carbon dioxide storage tank area through an air pipeline, wherein the passive temperature-controlled three-way valve 9 is located at the upper part of the fire extinguishing control area; when a fire occurs, the smoke sensor, temperature sensor, electronic control system, and electric three-way valve 5 fail in the event of a power outage, and the passive temperature-controlled three-way valve 9 can still function without relying on a power supply. It detects the on-site temperature through a memory alloy spring. When the on-site temperature reaches the set value, the memory alloy spring deforms and drives the passive temperature-controlled three-way valve 9 to operate, thereby ensuring that the low-pressure carbon dioxide fire extinguishing system can still achieve automatic start-up control in the absence of electricity; at the same time, the on-site operator can also start the low-pressure carbon dioxide fire extinguishing system directly by operating the on-site manual three-way valve 6 in the shortest time, thereby avoiding missing the best fire extinguishing time and causing huge economic losses to the enterprise.
[0035] The parts not described in detail in this utility model are prior art.
Claims
1. A passive temperature-controlled redundant start-up control system for a low-pressure carbon dioxide fire extinguishing system, comprising a pneumatic air source main valve (1), an air control panel air source valve (2), a partitioned air path valve (3), a filter (4), an electric three-way valve (5), a manual three-way valve (6), a quick exhaust valve (7), and a selection cylinder (8); wherein the characteristics are: The pneumatic air source main valve (1), the air control panel air source valve (2), the partition air path valve (3), the filter (4), the electric three-way valve (5), the quick exhaust valve (7), and the selection cylinder (8) are arranged in the low-pressure carbon dioxide storage tank area; the manual three-way valve (6) is independently arranged at the fire extinguishing area site and is connected in parallel control with the electric three-way valve (5) arranged in the low-pressure carbon dioxide storage tank area through the air path pipeline.
2. The passive temperature control redundant start control system of the low-pressure carbon dioxide fire extinguishing system according to claim 1 is characterized by: Also includes The passive temperature-controlled three-way valve (9); the pneumatic gas source main valve (1), the gas control panel gas source valve (2), the partition gas circuit valve (3), the filter (4), the electric three-way valve (5), the quick exhaust valve (7), and the selection cylinder (8) are arranged in the low-pressure carbon dioxide storage tank area; the manual three-way valve (6) and the passive temperature-controlled three-way valve (9) are connected in parallel control and arranged at the fire extinguishing area, wherein the passive temperature-controlled three-way valve (9) is arranged at the upper part of the fire extinguishing control area; the manual three-way valve (6) and the passive temperature-controlled three-way valve (9) are connected to the low-pressure carbon dioxide storage tank area through the gas circuit pipeline.
3. The passive temperature control redundant start-up control system of the low-pressure carbon dioxide fire extinguishing system according to claim 1 is characterized by: Also includes The passive temperature-controlled three-way valve (9); the pneumatic gas source main valve (1), the gas control panel gas source valve (2), the partition gas circuit valve (3), the filter (4), the electric three-way valve (5), the manual three-way valve (6), the quick exhaust valve (7), and the selection cylinder (8) are arranged in the low-pressure carbon dioxide storage tank area; the passive temperature-controlled three-way valve (9) is independently arranged at the fire extinguishing area site, located at the upper part of the fire extinguishing control area, and is connected in parallel control with the manual three-way valve (6) arranged in the low-pressure carbon dioxide storage tank area through the gas circuit pipeline.
4. The passive temperature control redundant start control system of the low-pressure carbon dioxide fire extinguishing system according to claim 3 is characterized by: The passive temperature-controlled three-way valve (9) comprises a three-way valve (9.1) and a valve core control assembly (9.2). The valve core control assembly (9.2) is fixedly arranged at one end of the three-way valve (9.1). A valve core (9.1.1) is movably arranged in the three-way valve (9.1). The valve core (9.1.1) and the valve core control assembly (9.2) are both provided with permanent magnets. The valve core control assembly (9.2) drives the valve core (9.1.1) to move through the permanent magnet, thereby controlling the switching of the passive temperature-controlled three-way valve (9).
5. The passive temperature control redundant start control system of the low-pressure carbon dioxide fire extinguishing system according to claim 4 is characterized by: A memory alloy spring (9.2.6) is provided in the valve core control assembly (9.2). When the memory alloy spring (9.2.6) detects a change in ambient temperature and deforms, it drives the permanent magnet in the valve core control assembly (9.2) to move.
6. The passive temperature control redundant start-up control system of the low-pressure carbon dioxide fire extinguishing system according to claim 4 is characterized by: A heat insulation component is provided between the three-way valve (9.1) and the valve core control assembly (9.2).
7. The passive temperature control redundant start control system of the low-pressure carbon dioxide fire extinguishing system according to claim 5 is characterized by: In the valve core control assembly (9.2), a heat insulating component is provided between the memory alloy spring (9.2.6) and other components.