Constant-pressure constant-flow water supply system
By using a constant pressure and constant flow water supply system, the pump speed is adjusted by a remote pressure gauge and a frequency converter, which solves the problem of unstable pressure and flow in the existing water supply system, and achieves stable equipment operation and reduced energy consumption.
Patent Information
- Application Number
- CN202423238145.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-27
AI Technical Summary
The existing water supply system experiences unstable pressure and flow when production water consumption changes, and frequent start-ups and shutdowns lead to high equipment failure rates, high energy consumption, and high noise levels, making it difficult to meet energy conservation and consumption reduction requirements.
A constant pressure and constant flow water supply system is adopted. The start and stop of the booster water pump are controlled by a remote pressure gauge and frequency converter in conjunction with a tuning fork level. Combined with a safety pressure relief valve and DC power supply, the pump speed is automatically adjusted to match the water consumption, avoiding frequent start and stop.
It achieves stable operation of water pumps, reduces mechanical and electrical failures, lowers energy consumption, and achieves unattended automatic control.
Smart Images
Figure CN223593287U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to automatic water supply technical field, specifically, relate to a kind of constant pressure constant current water supply system. BACKGROUND
[0002] As Figure 1 And Figure 2 As shown in the prior art water supply system includes pressurized water tank, pressurized water pump, circuit breaker QF, contactor KM, thermal relay FR, relay KA and electric contact pressure gauge P.The prior art water supply system is using 1 water pump to 1 closed water tank (i.e. Figure 1 10 cubic water supply device) pressurized mode formation, the start-stop of pressurized water pump is controlled by 1 electric contact pressure gauge P, pressurized water pump works in power frequency state, start-stop mode is high pressure stop (0.4MPa) low pressure start (0.2MPa).The prior art water supply system control mode is: open power switch→power indicator light bright→start water pump switch→contactor suction→water pump operation;When gauge pressure 0.4MPa, stop, when gauge pressure 0.2MPa, start, always work in this way.
[0003] The prior art water supply system has defects: when production water consumption is large, frequent start-stop (start 10 seconds stop 20 seconds) will occur, pressure and flow are unstable, and fluctuation is large;When production water consumption is small, water pressure is unstable, and flow is large and small alternately;Water pump frequent start-stop, noise is large, impeller key and key groove are often damaged, and equipment failure rate is high;Water pump frequent start-stop, current is large, energy consumption is high, motor is easy to heat, electric contact pressure gauge, contactor is often damaged, and electrical failure rate is high;Frequent start-stop, energy consumption is high, efficiency is low, and noise is large, which is not conducive to energy saving and consumption reduction requirement;Input voltage 380V, output current 16A, power 7.5KW, and energy consumption is large. UTILITY MODEL CONTENTS
[0004] The utility model provides a constant pressure constant current water supply system, which can solve the above problems.
[0005] In order to solve the above problems, the technical scheme adopted by the utility model is as follows:
[0006] The utility model provides a constant pressure constant current water supply system, which can solve the above problems.
[0007] As a further description of the above technical solution: the water supply device is also equipped with a safety pressure relief valve.
[0008] As a further description of the above technical solution: the power input terminal of the remote pressure gauge is connected to a +5V DC power supply, and the DC power supply is connected in parallel to the water pump operation indicator light.
[0009] Compared with the prior art, the beneficial effects of this utility model are:
[0010] The water pump will no longer start and stop frequently, nor will it run at high speed continuously. This reduces damage to the impeller key and keyway, thus reducing the mechanical failure rate. As a frequency conversion system, electrical components are less prone to damage. The current, power consumption, and motor heat generation are reduced, resulting in lower energy consumption and a lower electrical failure rate. As a fully automatic system with follow-up control, it can achieve unattended operation.
[0011] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, embodiments of this utility model are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of the existing water supply system before the renovation;
[0014] Figure 2 This is the electrical diagram of the existing water supply system before the renovation;
[0015] Figure 3 This is a sample diagram of the modified water supply system structure;
[0016] Figure 4 This is an example diagram of the electrical system of the modified water supply system. Detailed Implementation
[0017] 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.
[0018] This embodiment discloses a constant pressure and constant flow water supply system, which is... Figure 1 , Figure 2The original water supply system is modified to obtain the water supply system shown in the figure. The modified water supply system is as shown in the figure Figure 3 and Figure 4 as shown, comprising:
[0019] A remote pressure gauge P and a safety pressure relief valve 4 are installed on the water supply device 1, and a tuning fork liquid leveler 5 is installed between the pressurized water pump 3 and the water storage tank 2. Circuit breakers QF1 and QF2, a contactor KM, a frequency converter BP, rotary switches SA1 and SA2, a power indicator light HL1, a water pump operation indicator light HL2, and a DC power supply are installed in the distribution box.
[0020] When the constant pressure and constant flow water supply system described in this embodiment is in operation, the circuit breakers QF1 and QF2 are turned on, and the subsequent control process includes:
[0021] 1) Turn on the rotary switch SA1, the power is turned on, and the power indicator light HL1 is on.
[0022] 2) Turn on the rotary switch SA2, the coil of the contactor KM is energized, and the main contact and auxiliary contact are turned on.
[0023] 3) After the frequency converter BP delays for 5 seconds, the pressurized water pump 3 is connected to the AC power supply, and the pressurized water pump 3 starts to operate.
[0024] The speed of the pressurized water pump 3 is adjusted based on the frequency converter BP. When the water pressure detected by the remote pressure gauge P is lower, the frequency output by the frequency converter BP is higher, and the speed of the pressurized water pump 3 is also higher. Conversely, the speed of the pressurized water pump 3 is also lower. That is, the system can automatically adjust the pressure and flow according to the user's water consumption to match the production water.
[0025] Specifically, the water pressure in the water supply device 1 gradually increases, and during the increasing process of the value on the remote pressure gauge P from 0 MPa, every 0.1 MPa increase, the frequency of the frequency converter BP decreases by 10 Hz,
[0026] When the water pressure in the water supply device 1 reaches 5 MPa (i.e. the value on the remote pressure gauge P reaches 5 MPa), the water pressure will gradually decrease, and every 0.1 MPa decrease, the frequency of the frequency converter BP will increase by 10 Hz. In this way, the value on the remote pressure gauge P is maintained within the range of 0.26 MPa to 0.3 MPa, which is the normal water pressure.
[0027] When the frequency output by the frequency converter BP decreases, the speed of the pressurized water pump 3 decreases, and when the frequency output by the frequency converter BP increases, the speed of the pressurized water pump 3 increases, so that the water flow pressure can be maintained.
[0028] When the water tank 2 before the pump is empty, the tuning fork of the tuning fork liquid level gauge 5 is out of water, the "internal relay KA coil is energized and attracted, the normally closed contact is disconnected", that is, the contact of the tuning fork controller LK is disconnected, the coil of the contactor KM is de-energized, the contact of the contactor KM is disconnected, the input control power of the frequency converter BP is cut off, and the pressurized water pump 3 stops immediately to protect the pressurized water pump 3 and avoid idling.
[0029] When the water tank 2 before the pump is full, the tuning fork of the tuning fork liquid level gauge 5 is submerged, the "internal relay KA coil is de-energized, the normally closed contact is reset and connected", that is, the contact of the controller LK is connected, and then the controller LK will not cut off the control power of the input end of the frequency converter BP; the L end and the N end of the tuning fork liquid level gauge 5 are powered by a ~220V power supply and always remain powered.
[0030] Further, the water supply device 1 further increases the pressure relief safety relief valve to ensure overpressure protection when an electrical fault occurs.
[0031] Further, the DC power supply provides +5V power supply for the remote pressure gauge P.
[0032] The above only describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A constant pressure and constant flow water supply system, comprising a water storage tank, a water supply unit, a booster pump, a contactor, and a pump operation indicator light, characterized in that, It also includes a frequency converter, a remote pressure gauge, and a tuning fork level sensor; the frequency converter is installed on the power input side of the booster pump; the signal output terminal of the remote pressure gauge is connected to the frequency converter, and the pressure detection terminal is connected to the water supply unit; the tuning fork level sensor is installed in the pipeline between the booster pump and the water storage tank, and its controller is connected to the coil of the contactor, which controls the contactor to open when the tuning fork of the level sensor is removed from the water.
2. The constant pressure and constant flow water supply system according to claim 1, characterized in that, The water supply unit is also equipped with a safety pressure relief valve.
3. The constant pressure and constant flow water supply system according to claim 1, characterized in that, The power input terminal of the remote pressure gauge is connected to a +5V DC power supply, and the DC power supply is connected in parallel to the water pump operation indicator light.