Wet and dry dual-purpose alarm valve capable of preventing water system assembly from being damaged due to freezing invasion
By designing a wet and dry alarm valve that can automatically switch to dry or wet under different temperature conditions, the problem of wet fire water system being susceptible to freezing damage in winter, while avoiding the high cost of dry system and Inefficient, improves the reliability and fire extinguishing efficiency of the fire protection system.
Patent Information
- Application Number
- CN202411793417.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-02-21
AI Technical Summary
When the temperature is below 4 degrees Celsius in winter, wet fire water systems are susceptible to freezing damage, resulting in components damage and leaks, increasing maintenance costs and affecting fire safety. However, dry systems have high cost, difficulty in maintenance, slow response and low fire extinguishing efficiency. and poor reliability issues.
A dual-purpose dry and wet alarm valve is designed to operate as a wet system when the temperature is not less than 4 degrees Celsius and automatically convert it into a dry system when the temperature is less than 4 degrees Celsius. The alarm valve realizes mutual conversion between wet and dry systems by regulating the valve state and controlling the solenoid valve.
Automatic switching of the system under different temperature conditions is achieved, avoiding the problem of freezing and damage to wet systems in winter, and avoiding the high cost and low efficiency of dry systems, improving the reliability and fire extinguishing efficiency of fire protection systems.
Smart Images
Figure CN119488687A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of fire fighting equipment, in particular to an alarm valve capable of converting between wet and dry types, in particular to a wet and dry dual-purpose alarm valve. Background Art
[0002] For some areas, the temperature in winter will be lower than 4 degrees Celsius, and sometimes there will be cold currents that do not last long. However, the temperature in most of the year is higher than 4 degrees Celsius. The fire water system in these areas generally uses a wet system, which has the characteristics of high efficiency, reliability, economy, and wide applicability. However, in winter, the fire water system will be damaged by freezing, resulting in damage to components and water leakage, which increases maintenance costs, reduces the service life of the water system, and seriously affects fire safety. If the water system is made into a pre-action or dry system, these systems have high cost, difficult later maintenance, slow response, low fire extinguishing efficiency, and poor reliability. For this reason, those skilled in the art have proposed a dry-wet dual-purpose alarm valve and its use method, that is, the water system is usually a wet system, which can be converted into a dry system when the temperature is lower than 4 degrees Celsius. Summary of the invention
[0003] Technical problem to be solved: In view of the deficiencies of the prior art, the present invention proposes a wet-dry dual-purpose alarm valve in which the water system is a wet system when the air temperature is not less than 4 degrees Celsius, and can be converted into a dry system when the temperature is less than 4 degrees Celsius.
[0004] Technical solution: The alarm valve structure has a deluge valve on the top and a wet alarm valve or a one-way valve on the bottom. When the temperature is below 4 degrees Celsius, the system needs to be adjusted to a dry system state. The states of the valves after debugging are shown in Figures 1 and 2. At this time, the alarm pipeline control valve is open (17), the water discharge test valve is closed (18), the alarm test valve is closed (19), the wet valve lower chamber pressure gauge control valve is open (20), the wet valve upper chamber pressure gauge control valve is open (21), the deluge valve pressure chamber control valve is open (7), the drain valve is closed (8), the drip valve pipeline control valve is open (10), the manual quick opening valve is closed (4), and the solenoid valve is closed (1). At this time, the pressure chamber of the deluge valve is equal to the pressure on the water supply side, plus the weight of the valve disc, and the water will be locked in the water supply. The upper system side is air. When any two detectors or one detector plus a manual alarm button in the same fire compartment are triggered, the linkage controller will open the solenoid valve (1) after receiving two alarm signals. At this time, the water in the pressure chamber of the deluge valve will be released, resulting in pressure imbalance. The deluge valve disc will be opened, and water will enter the system side. At the same time, the water in the wet valve below will enter the alarm pipeline. The hydraulic alarm will sound, the pressure switch will be activated, and the water pump will be started in a chain. When the temperature at the scene rises, the closed sprinkler will burst, and water will be sprayed from the sprinkler to start extinguishing the fire. When the temperature is higher than or equal to 4 degrees Celsius, the system should be debugged as a wet system. The status of each valve after debugging is shown in Figures 3 and 4. At this time, the alarm pipeline control valve is open (17), the water discharge test valve is closed (18), the alarm test valve is closed (19), the wet valve lower chamber pressure gauge control valve is open (20), the wet valve upper chamber pressure gauge control valve is open (21), the deluge valve pressure chamber control valve is closed (7), the drain valve is closed (8), the drip pipeline control valve is closed (10), the manual quick opening valve is opened (4), and the solenoid valve is opened (1). When a fire occurs on site, the temperature rises, the closed sprinkler head bursts, and water sprays out from the sprinkler head to start extinguishing the fire.
[0005] Description of the drawings: A brief description of the drawings [Figures 1 to 4] is given. Figures 1 to 4 are all appearance diagrams of the present invention. Figures 1 to 4 are the same alarm valve, but with different working modes.
[0006] Figure 1 This is the schematic diagram of the system in dry working state.
[0007] Figure 2 The components in Figure 1 are annotated with text.
[0008] Figure 3 This is the principle diagram of the system in dry working state. The components in Figure 3 are the same as those in Figures 1 and 2.
[0009] Figure 4 The components in Figure 3 are labeled with text.
[0010] Names of the components: (1) solenoid valve, (2) pressure gauge, (3) pressure gauge, (4) manual quick-opening valve, (5) check valve, (6) filter, (7) pressure chamber control valve, (8) drain valve, (9) pressure chamber, (10) control valve, (11) automatic drip valve, (25) valve disc, (12) pressure switch, (13) hydraulic alarm, (14) delay, (15) drip valve, (16) filter, (17) alarm pipeline control valve, (18) drain test valve, (19) alarm test valve, (20) control valve, (21) control valve, (22) compensator, (23) pressure gauge, (24) pressure gauge, (26) valve disc. DETAILED DESCRIPTION Implementation method 1: When the system is in a wet state, it needs to be adjusted to a dry system as the temperature drops. As shown in Figures 1 and 2, open the pressure chamber control valve (7) of the deluge valve, close the manual quick-opening valve (4), close the solenoid valve (1), open the drain valve (8), wait until all the water in the upper chamber of the deluge valve is drained, then close the drain valve (8), and finally open the drip pipe control valve (10).
[0012] Embodiment 2: When the system is in a dry state and needs to be adjusted to a wet state, as shown in FIGS. 3 and 4 , the pressure chamber pipeline control valve (7) of the deluge valve is closed, the manual quick-opening valve (4) is opened, and the drip pipeline control valve (10) is closed. The water in the pressure chamber (9) is drained away, the pressure is reduced, the valve flap (25) is opened, and the water on the water supply side enters the system side. The system becomes a wet system. During this process, the pressure switch (12) is actuated, the hydraulic alarm (13) sounds, and the water pump is started. After the debugging is completed, the pump can be stopped manually.
Claims
1. A wet / dry alarm valve to prevent damage to water system components caused by freezing.
2. The alarm valve structure has a deluge valve on the top and a wet alarm valve or a one-way valve on the bottom. As shown in Figures 1 and 2, the wet alarm valve is composed of a pressure switch (12), a hydraulic alarm (13), a delay device (14), a drip valve (15), a filter (16), an alarm pipeline control valve (17), a water discharge test valve (18), an alarm test valve (19), a control valve (20), a control valve (21), a compensator (22), a pressure gauge (23), a pressure gauge (24), a valve disc (26) and a valve body, and the deluge valve is composed of a solenoid valve (1), a pressure switch (2), a pressure switch (3), a manual quick-opening valve (4), a one-way valve (5), a filter (6), a pressure chamber control valve (7), a drain valve (8), a pressure chamber (9), a control valve (10), an automatic drip valve (11), a valve disc (25) and a valve body. When the temperature is lower than 4 degrees Celsius, the system needs to be adjusted to a dry system state. The states of the valves after debugging are shown in Figures 1 and 2. At this time, the alarm pipeline control valve is open (17), the drain test valve is closed (18), the alarm test valve is closed (19), the wet valve lower chamber pressure gauge control valve is open (20), the wet valve upper chamber pressure gauge control valve is open (21), the deluge valve pressure chamber control valve is open (7), the drain valve is closed (8), the drip valve pipeline control valve is open (10), the manual quick opening valve is closed (4), and the solenoid valve is closed (1). At this time The pressure in the pressure chamber of the deluge valve is equal to the pressure on the water supply side, plus the weight of the valve disc. Water will be locked on the water supply side, and the upper system side will be air. When any two detectors in the same fire protection zone or one detector plus a manual alarm button report a fire, the linkage controller will open the solenoid valve (1) after receiving the alarm signal. At this time, the water in the pressure chamber of the deluge valve will be released, resulting in pressure imbalance. The deluge valve disc will be opened, and water will enter the system side. At the same time, the water in the wet valve below will enter the alarm pipeline, the hydraulic alarm will sound, the pressure switch will be activated, and the water pump will be started in a chain reaction. When the temperature is higher than or equal to 4 degrees Celsius, the system should be debugged as a wet system. The status of each valve after debugging is shown in Figures 3 and 4. At this time, the alarm pipeline control valve is open (17), the water discharge test valve is closed (18), the alarm test valve is closed (19), the wet valve lower chamber pressure gauge control valve is open (20), the wet valve upper chamber pressure gauge control valve is open (21), the deluge valve pressure chamber control valve is closed (7), the drain valve is closed (8), the drip pipeline control valve is closed (10), the manual quick opening valve is open (4), and the solenoid valve is open (1).
3. When the system is in a wet state, as the temperature drops, it needs to be adjusted to a dry system, as shown in Figures 1 and 2, open the pressure chamber control valve (7) of the deluge valve, close the manual quick-opening valve (4), close the solenoid valve (1), open the drain valve (8), wait until the water in the upper chamber of the deluge valve is completely drained, then close the drain valve (8), and finally open the drip pipe control valve (10), and the system is completed. When the system is in a dry state and needs to be adjusted to a wet state, as shown in Figures 3 and 4, close the pressure chamber control valve (7) of the deluge valve, open the manual quick-opening valve (4), close the drip pipe control valve (10), the water in the pressure chamber (9) is drained, the pressure is reduced, the valve disc (25) is opened, the water on the water supply side enters the system side, and the system becomes a wet system. During this process, the pressure switch (12) is activated, the hydraulic alarm (13) will sound, and the water pump will start. After the debugging is completed, the pump can be stopped manually.
4. The valve switches in this process can also be replaced by solenoid valves, and the temperature controller can be used to control the solenoid valves to achieve automatic conversion between wet and dry types.