Water replenishing device for fire pool
By introducing a supplementary water tank and a level sensor into the fire water tank replenishment device, automatic water replenishment is achieved by utilizing gravity difference, which solves the problem of insufficient water volume in fire water tanks during the renovation of old residential areas and realizes efficient and low-cost water replenishment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING JINGCHENG HUAYU ARCHITECTURAL DESIGN & RES INST CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-05-12
AI Technical Summary
In the renovation of old residential areas, the water volume of fire-fighting water tanks is insufficient and expansion is difficult. Traditional expansion solutions are costly and difficult to construct.
Design a fire water tank replenishment device, including a replenishment tank, a liquid level sensor, a control box and a replenishment pipeline. The liquid level sensor monitors the water level and automatically replenishes water when the water level drops to a preset value. The water replenishment is achieved without power by gravity difference, avoiding modification of the original structure.
It enables precise control of water replenishment without altering the original structure, preventing overflow, meeting fire-fighting water needs, and reducing construction costs.
Smart Images
Figure CN224227898U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fire protection system technology, specifically to a fire water tank replenishment device. Background Technology
[0002] To accelerate the renovation of old residential communities, continuously improve the living environment, and meet the people's needs for a better life, the renovation of fire protection systems is particularly important. Due to revisions in regulations, many existing fire protection facilities no longer meet current requirements, with modifications to the water volume of fire water tanks being particularly difficult.
[0003] In the renovation of old residential communities, the expansion of fire water tanks faces structural limitations and site constraints. Under existing technology, if the water volume cannot be reduced using municipal fire hydrants, innovative measures are needed to supplement fire water supply. Traditional expansion solutions are costly and difficult to construct.
[0004] Therefore, there is an urgent need for an automated water replenishment device. Utility Model Content
[0005] This utility model was developed to solve the above-mentioned technical problems. Its purpose is to provide a fire water tank replenishment device to solve the problem of insufficient water volume in fire water tanks in old renovation projects and to compensate for the water volume in fire water tanks.
[0006] To achieve the above objectives, this utility model provides a fire water tank replenishment device, comprising: an original fire water tank, a control box, a replenishment water tank located near the original fire water tank, a replenishment water pipeline located between the replenishment water tank and the original fire water tank, a liquid level sensor located in the original fire water tank, and a first valve located on the replenishment water pipeline;
[0007] The liquid level sensor is used to monitor the water level in the original fire water tank and generate a signal;
[0008] The control box is used to receive the signal from the liquid level sensor and, when the water level of the original fire water tank drops to a preset level, open the first valve to replenish the original fire water tank with water from the replenishment tank.
[0009] Preferably, the liquid level in the supplementary water tank is higher than the liquid level in the original fire water tank.
[0010] Preferably, the volume of the supplementary water tank is determined based on the water shortage of the original fire water tank.
[0011] Preferably, the diameter of the water supply pipeline is determined based on the design flow rate of the fire pump.
[0012] Preferably, a second valve is provided on the water supply pipeline between the replenishment water tank and the original fire water pool, for manually activating emergency water supply in case the first valve fails.
[0013] Preferably, the first valve is an electric valve;
[0014] The first valve is electrically connected to the control box.
[0015] Preferably, the liquid level sensor is one of a float sensor, a pressure sensor, or an ultrasonic sensor.
[0016] Preferably, a check valve is provided at the connection between the water supply pipeline and the original fire water tank, and the check valve is used to prevent water from flowing back into the water supply pipeline.
[0017] Preferably, the water supply pipeline is a stainless steel pipeline or a polyvinyl chloride pipeline.
[0018] Preferably, a rust-proof coating is provided on the surface of the control box, and a sealing strip is provided on the inside of the control box door.
[0019] Based on the above description and practical application, the fire water tank replenishment device of this utility model connects the replenishment tank to the existing fire water tank via a replenishment pipeline. The replenishment tank is positioned above the highest operating level of the original fire water tank, creating a height difference. A level sensor is installed inside the original fire water tank to continuously monitor changes in its water level and transmits the dynamic level signal to the control box. When fire-fighting water usage causes the original fire water tank level to drop to a critical threshold, the control box automatically activates the replenishment tank to replenish water and terminates the replenishment operation once the level returns to a safe range. This device requires no modification to the original water tank structure and can precisely control the water volume, preventing overflow. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the fire water tank replenishment device in one embodiment of the present invention.
[0021] The attached figures are labeled as follows:
[0022] 1. Replenishment water tank; 2. Original fire water tank; 3. Liquid level sensor; 4. Electric valve; 5. Control box; 6. Overflow water level; 7. Pump stop water level; 8. Pump start water level. Detailed Implementation
[0023] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
[0024] Furthermore, the accompanying drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. It should be noted that in this disclosure, the terms "comprising," "configured with," and "set in" are used to indicate an open-ended inclusion, meaning that additional elements / components / etc. may exist besides those listed; the terms "first," "second," etc., are used only as labels and are not intended to limit the number or order of objects; the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0025] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0026] In response to the aforementioned issue of insufficient water volume in existing fire water tanks, and to address the problem of having sufficient fire water for firefighting, this utility model proposes a fire water tank replenishment device.
[0027] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0028] Please refer to Figure 1The fire water tank replenishment device of this utility model includes: the original fire water tank 2, the replenishment water tank 1, the liquid level sensor 3, the electric valve 4, and the control box 5. The original fire water tank 2 is an existing fire water storage facility in the existing building, usually located in the underground space or inside the building, and its volume may be insufficient due to the need for code updates or renovations. The replenishment water tank 1, as a new water storage unit, is installed on the ground or roof near the original fire water tank 2, and the two are physically connected by a replenishment pipeline. The bottom elevation of the replenishment water tank 1 must be higher than the highest design water level of the original fire water tank 2, using gravity to create a replenishment pressure difference. The replenishment pipeline is made of pressure-resistant and corrosion-resistant materials, such as stainless steel or rigid polyvinyl chloride PVC-U, and the pipe diameter is determined according to the design flow rate of the fire pump to ensure that the water in the replenishment water tank 1 can be completely injected into the original fire water tank 2 within a preset time when fire-fighting water is needed. The level sensor 3 is installed on the inner wall of the original fire water tank 2. The detection range of the level sensor 3 covers the interval from the lowest pump start water level 8 to the highest overflow water level 6, monitoring water level changes in real time, and its signal is transmitted to the control box 5. When the level sensor 3 detects that the water level has dropped to the pump start water level 8, the control box 5 outputs a command to open the first valve 4, and the water supply pipeline begins to inject water into the original fire water tank 2; when the fire water use ends and the water level returns to the pump stop water level 7, the first valve 4 automatically closes. In a specific embodiment, the first valve 4 is preferably a flange-connected solenoid valve with the same diameter as the water supply pipeline, and a rubber sealing gasket is installed between the flanges to ensure no leakage at the connection.
[0029] Furthermore, the liquid level in the supplementary water tank 1 must be strictly higher than the highest operating water level of the original fire water tank 2. This height difference design not only utilizes gravity to achieve non-powered water replenishment but also avoids water replenishment interruptions due to pump failure. The volume of the supplementary water tank 1 needs to be accurately calculated based on the water shortage of the original fire water tank 2. For example, if the existing volume of the original water tank 2 is 100 cubic meters, while the standard requires a total effective fire water volume of 130 cubic meters, then the volume of the supplementary water tank 1 should be designed to be 30 cubic meters. The supplementary water tank 1 can be made of precast concrete or fiberglass, with a drain valve at the bottom, an inspection port and vent at the top, and an epoxy resin anti-corrosion coating inside to extend its service life.
[0030] Furthermore, the diameter of the water supply pipeline must be matched with the flow rate of the fire pump, and the laying path of the water supply pipeline should be as short as possible horizontally to reduce water loss along the pipeline. 45-degree or 90-degree elbows should be used at pipeline bends, with smooth inner walls to reduce turbulence. In addition, a check valve must be installed at the connection between the water supply pipeline and the original fire water tank 2. The check valve should open from the water supply tank 1 to the original water tank 2 to prevent water from the original water tank 2 from flowing back to the water supply tank 1 in non-firefighting conditions.
[0031] Furthermore, the first valve is an electric valve; it is electrically connected to the control box, and a second valve is installed on the water supply line as a backup measure. The second valve is a manual valve, installed to one side of the first valve 4. When the first valve 4 cannot be opened due to circuit failure or mechanical jamming, the operator can manually operate the second valve to achieve emergency water supply. The valve stem of the second valve extends above the ground and is equipped with a dust cover and operating handle for easy and quick opening and closing in emergencies.
[0032] Furthermore, the specific selection of the liquid level sensor 3 can be determined based on actual working conditions. For example, a float-type sensor uses a stainless steel float and mechanical linkage structure to monitor water level. The float's density is slightly less than water, and it rotates the linkage as the water level rises and falls, thereby triggering an internal microswitch to generate a signal. A pressure sensor is installed at the bottom of the raw water tank, calculating the water level by measuring water pressure. An ultrasonic sensor is installed at the top of the tank, emitting ultrasonic waves towards the water surface and receiving the reflected waves, calculating the water level based on the time difference; this is suitable for corrosive water environments. Regardless of the type used, the liquid level sensor needs to be calibrated regularly. For example, a manual calibration knob can be added to the mechanical linkage of the float-type sensor. By rotating the knob, the initial position of the float can be adjusted to ensure that the water level monitoring error does not exceed ±1%.
[0033] Furthermore, the surface of control box 5 is coated with an epoxy anti-rust coating, which can effectively prevent dust intrusion and low-pressure water spray. Control box 5 dynamically adjusts the opening and closing of the first valve 4 based on the real-time signal from the liquid level sensor 3. The inside of the control box 5 door is fitted with a silicone sealing strip, and the door lock uses a waterproof knob design to prevent humid air from entering the box.
[0034] Furthermore, in terms of maintenance and management, the calibration status of the level sensor 3 needs to be checked monthly, the sediment in the replenishment tank 1 needs to be cleaned quarterly, and the backup power switching function of the control box 5 needs to be tested annually. The lubricating grease of the electric valve 4 needs to be replaced every six months, and the valve core of the check valve needs to be disassembled and cleaned every two years. All maintenance operations are recorded in the storage module of the control box 5, forming a complete equipment lifecycle management file.
[0035] In summary, this utility model increases the required volume of the fire water tank without modifying its structure. Under normal circumstances, a supplementary water tank (generally with a higher level than the original fire water tank) is constructed near the fire water tank, and a water supply pipeline is installed connecting it to the original fire water tank. Electric or solenoid valves are installed at the pipeline ports. During firefighting, after the fire pump starts, the water level in the original fire water tank continuously drops. When the water level drops to the set level, the electric valve on the supplementary water pipe connecting the two tanks opens and closes, allowing water from the second tank to replenish the fire water tank, meeting the firefighting water needs. The valve automatically closes after the firefighting water supply is completed.
[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A fire-fighting water tank replenishment device, characterized in that, include: The original fire water tank, control box, supplementary water tank located near the original fire water tank, supplementary water pipeline located between the supplementary water tank and the original fire water tank, liquid level sensor located in the original fire water tank, and first valve located on the supplementary water pipeline; The liquid level sensor is used to monitor the water level in the original fire water tank and generate a signal; The control box is used to receive the signal from the liquid level sensor and, when the water level of the original fire water tank drops to a preset level, open the first valve to replenish the original fire water tank with water from the replenishment tank.
2. The fire water tank replenishment device as described in claim 1, characterized in that, The level of the supplementary water tank is higher than the level of the original fire water tank.
3. The fire water tank replenishment device as described in claim 1, characterized in that, The volume of the supplementary water tank is determined based on the water shortage of the original fire water tank.
4. The fire water tank replenishment device as described in claim 1, characterized in that, The diameter of the water supply pipeline is determined based on the design flow rate of the fire pump.
5. The fire water tank replenishment device as described in claim 1, characterized in that, A second valve is provided on the water supply pipeline between the replenishment water tank and the original fire water pool, which is used to manually activate emergency water supply when the first valve fails.
6. The fire water tank replenishment device as described in claim 1, characterized in that, The first valve is an electric valve; The first valve is electrically connected to the control box.
7. The fire water tank replenishment device as described in claim 1, characterized in that, The liquid level sensor is one of a float sensor, a pressure sensor, or an ultrasonic sensor.
8. The fire water tank replenishment device as described in claim 1, characterized in that, A check valve is installed at the connection between the water supply pipeline and the original fire water tank. The check valve is used to prevent water from flowing back into the water supply pipeline.
9. The fire water tank replenishment device as described in claim 1, characterized in that, The water supply pipeline is made of stainless steel or polyvinyl chloride.
10. The fire-fighting water tank replenishment device as described in claim 1, characterized in that, A rust-proof coating is applied to the surface of the control box, and a sealing strip is provided on the inside of the control box door.