A CNC superimposed compensation integrated non-negative pressure water supply equipment

Abstract

The present invention relates to the technical field of water supply equipment, and discloses a numerically controlled superimposed compensation type integrated non-negative pressure water supply equipment, including a tank body, to which a water inlet manifold is connected, to which a low-area water supply pump group and a middle-area water supply pump group are connected in parallel, and the ends of the low-area water supply pump group and the middle-area water supply pump group away from the water inlet manifold are connected to a low-area water outlet pipe, and the low-area water outlet pipe is connected to a high-area water supply mechanism. In the present invention, this water supply equipment integrates the control system as a whole into the equipment to realize a truly integrated non-negative pressure water supply equipment that can be superimposed and automatically and quickly compensate for the pressure of the municipal pipe network, thereby reducing the wiring overlap cost of the control equipment; the limit value for eliminating negative pressure can be adjusted according to the needs of actual production, and the negative pressure generated by the steady flow tank of the water supply equipment in actual production can be quantitatively eliminated, effectively preventing damage to the water supply equipment.

Description

Technical Field

[0001] The invention relates to the technical field of water supply equipment, in particular to a digitally controlled superimposed compensation type integrated non-negative pressure water supply equipment. Background Art

[0002] The current water supply equipment is a whole, and the equipment control cabinet is a separate whole. It is mainly transported to the user area through the municipal water supply network, and then after passing through the flow stabilization tank, it is supplied to each water point after secondary pressurization by a pressure pump. However, in areas with different altitudes, 3 or more sets of equipment are often used to work independently without interfering with each other. This non-negative pressure water supply equipment has some problems:

[0003] 1) The equipment and control are two separate entities, occupying a large area, and the wiring of the control equipment is complicated and time-consuming, and the materials used are high and the cost is high;

[0004] 2) The existing equipment is equipped with multiple sets of secondary pressurization equipment for water use areas at different heights, which occupies a large area and has high equipment costs;

[0005] 3) The maintenance and upkeep of multiple sets of equipment takes a long time, resulting in low efficiency and waste of resources;

[0006] 4) When the water pressure of the municipal water supply network is insufficient, the amount of water in the flow stabilization tank is small, making it difficult to quickly and effectively compensate the water pump, which increases the working pressure of the water pump and reduces the water supply efficiency of the water supply equipment;

[0007] 5) When the municipal water supply network is insufficient, the outside air will always be connected to the constant flow tank, which can easily cause secondary pollution of the water quality.

[0008] Based on this problem of non-negative pressure water supply equipment, this CNC superposition compensation integrated non-negative pressure water supply equipment came into being and became the first choice for solving practical problems. This equipment is of great significance to improving the water supply efficiency of the municipal water supply network. Summary of the invention

[0009] The purpose of the present invention is to provide a digitally controlled superimposed compensation type integrated non-negative pressure water supply equipment to solve the problems raised in the above-mentioned background technology.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] A numerically controlled superimposed compensation integrated non-negative pressure water supply equipment comprises a tank body, to which a water inlet manifold is connected, to which a low zone water supply pump group and a middle zone water supply pump group are connected in parallel, and the low zone water supply pump group and the middle zone water supply pump group are connected to a low zone water outlet pipe at one end away from the water inlet manifold, and the low zone water outlet pipe is connected to a high zone water supply mechanism.

[0012] As a further solution of the present invention: the high zone water supply mechanism comprises a high zone water supply pump and a stacking pump group connected in parallel, and the high zone water supply pump and the stacking pump group are connected to the high zone water outlet pipe at one end away from the low zone water outlet pipe.

[0013] As a further solution of the present invention: a pressure monitoring device and a pressure protection device are installed on the high zone water outlet pipe and the low zone water outlet pipe.

[0014] As a further solution of the present invention: a water inlet, a pressure monitoring device and a solenoid valve are respectively installed on the front wall of the tank body.

[0015] As a further solution of the present invention: air pressure tanks are also installed on the high zone water outlet pipe and the low zone water outlet pipe.

[0016] As a further solution of the present invention: it also includes a control system.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1) This water supply equipment integrates the control system into the equipment as a whole to realize a truly integrated non-negative pressure water supply equipment that can be stacked and automatically and quickly compensate for the pressure of the municipal pipe network, thereby reducing the wiring and connection costs of the control equipment;

[0019] 2) Adopt the principle of connecting water pumps in series to increase the head. Connect a superimposed pump group in series at the outlet of the low-zone water supply pump group. Superimpose the water discharged from the low-zone water pump again to increase the head to meet the water supply in the high zone. The equipment is equipped with separate pressure sensors and monitoring systems for low, medium and high zones. Different pressure preset values ​​can be set for different water-using zones to meet the water demand of each zone. Through the actual feedback value of the pressure in each water-using zone, the system automatically analyzes and adjusts the working status of the equipment to meet the water demand of each water-using zone. One set of superimposed equipment can replace three sets of traditional equipment for low, high and ultra-high zones, greatly reducing the equipment footprint and pump room construction costs. Reduce equipment maintenance costs, improve equipment utilization and reduce resource waste;

[0020] 3) The pressure sensor controls the opening and closing of the solenoid valve to ensure that the flow tank remains sealed when the liquid level in the tank drops. The gas medium pressure in the flow tank is used to quickly and automatically compensate for the municipal water pressure, reduce the working pressure of the water pump unit, and improve the water supply efficiency of the municipal water supply network;

[0021] 4) The limit value for eliminating negative pressure can be adjusted according to the needs of actual production, and the negative pressure generated by the steady flow tank of the water supply equipment in actual production can be quantitatively eliminated to effectively prevent damage to the water supply equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a CNC superimposed compensation integrated non-negative pressure water supply equipment.

[0023] In the figure: 1. tank body; 2. water inlet; 3. water inlet manifold; 4. solenoid valve; 5. low zone water supply pump group; 6. air pressure tank; 7. pressure monitoring device; 8. middle zone water supply pump group; 9. superposition pump group; 10. pressure protection device; 11. high zone water outlet pipe; 12. high zone water supply pump; 13. low zone water outlet pipe. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0028] See also Figure 1In an embodiment of the present invention, a numerically controlled superimposed compensation type integrated non-negative pressure water supply equipment includes a tank body 1, the tank body 1 is connected to a water inlet manifold 3, the water inlet manifold 3 is connected in parallel to a low-zone water supply pump group 5 and a middle-zone water supply pump group 8, the low-zone water supply pump group 5 and the middle-zone water supply pump group 8 are connected to a low-zone outlet pipe 13 at one end away from the water inlet manifold 3, and the low-zone outlet pipe 13 is connected to a high-zone water supply mechanism. This water supply equipment integrates the control system as a whole into the equipment to achieve true integration, greatly reducing the equipment footprint, reducing the equipment wiring overlap cost and the pump room construction cost. The water supply equipment adopts a superimposed method to be able to use different water pressures in different regions. One set of superimposed equipment can replace the three sets of traditional low, high and super-high zone equipment, greatly reducing the equipment footprint and the equipment and pump room construction costs. The system status quickly adjusts the water supply pressure, realizes full-automatic, unattended, constant water pressure, self-protection and processing of equipment failures, accumulation of working hours, complete pressure monitoring and control, and effectively compensates for the insufficient pressure generated by the municipal water supply network, eliminates the negative pressure generated in the water supply equipment steady flow tank, and protects the water supply equipment.

[0029] The high area water supply mechanism comprises a high area water supply pump 12 and a stacking pump group 9 connected in parallel, and one end of the high area water supply pump 12 and the stacking pump group 9 away from the low area water outlet pipe 13 is connected to the high area water outlet pipe 11.

[0030] The high zone water outlet pipe 11 and the low zone water outlet pipe 13 are both installed with a pressure monitoring device 7 and a pressure protection device 10 .

[0031] A water inlet 2, a pressure monitoring device 7 and a solenoid valve 4 are respectively installed on the front wall of the tank body 1.

[0032] The high area water outlet pipe 11 and the low area water outlet pipe 13 are also equipped with an air pressure tank 6 .

[0033] Also includes a control system.

[0034] The working principle of the present invention is as follows: the equipment is separately equipped with pressure sensors and monitoring systems for low, medium and high areas, and different pressure preset values ​​can be set for different water use areas to meet the water demand of each area. Through the actual pressure feedback value of each water use area, the system automatically analyzes and adjusts the working status of the equipment to meet the water demand of each water use area.

[0035] 1) When the actual feedback value of the pressure sensor at the low-zone user end is less than the preset value, the low-zone pump group 1# will start with a delay to pressurize the user end to the preset pressure. When the actual pressure value at the user end is greater than the preset pressure and the pressure at the user end is stable, the pump group will stop pressurizing with a delay. When the low-zone water use peaks, the actual feedback value of the user end pressure is lower than the preset pressure lower limit, the inverter output is fully loaded and the pump adding time is reached, the low-zone pump group will perform the delayed pump adding logic, and the low-zone 2# pump will start pressurizing to meet the peak water use demand. When the user end outlet pressure is greater than the upper pressure limit and the pump reduction time is reached, the low-zone pump group will perform the delayed pump reduction logic. When the water is used at a low flow rate at night, the user end pressure is greater than the preset wake-up pressure of the water pump, the inverter operating frequency is less than the sleep frequency and the sleep time is reached, and the water pump can enter the sleep program. The outlet pressure regulating tank starts the small flow pressure maintenance function to avoid repeated wake-up of the water pump due to small flow water use, which causes energy waste. When the pressure at the user end is less than the wake-up pressure, the water pump can be awakened and enter the working state.

[0036] 2) When the actual feedback value of the pressure sensor at the high-zone user end is less than the preset value, the high-zone pump group 1# will start with a delay to pressurize the user end to the preset pressure. When the actual pressure value at the user end is greater than the preset pressure and the pressure at the user end is stable, the pump group will stop pressurizing with a delay. When the high-zone water consumption peaks, the actual feedback value of the user end pressure is lower than the preset pressure lower limit, the inverter output is fully loaded and the pumping time is reached, the high-zone pump group will perform the delayed pumping logic, the high-zone superimposed pump will start pressurizing, and the low-zone pump group will automatically adjust the pump group working state according to the actual pressure feedback value at the user end to meet the peak water demand. When the outlet pressure at the user end is greater than the upper pressure limit and the pump reduction time is reached, the high-zone superimposed pump group will perform the delayed pump reduction logic. When the water is used at a low flow rate at night, the pressure at the user end is greater than the preset wake-up pressure of the water pump, the inverter operating frequency is less than the sleep frequency and the sleep time is reached, and the water pump can enter the sleep program. The outlet pressure regulating tank starts the small flow pressure maintenance function to avoid repeated wake-up of the water pump due to small flow water consumption, which causes energy waste. When the pressure at the user end is less than the wake-up pressure, the water pump can be awakened and enter the working state.

[0037] 3) When the actual feedback value of the pressure sensor at the user end of the ultra-high zone is less than the preset value, the ultra-high zone pump group 2# will start with a delay to pressurize the user end to the preset pressure. When the actual pressure value at the user end is greater than the preset pressure and the pressure at the user end is stable, the pump group will stop pressurizing with a delay. When the water consumption in the ultra-high zone is at a peak, the actual feedback value of the pressure at the user end is lower than the preset pressure lower limit, the inverter output is fully loaded and the pump adding time is reached, the ultra-high zone pump group will perform a delayed pump adding logic, and the ultra-high zone pump superimposed pump will start pressurizing to meet the peak water demand. When the outlet pressure at the user end is greater than the upper pressure limit and the pump reduction time is reached, the ultra-high zone superimposed pump group will perform a delayed pump reduction logic. When the water is used at a low flow rate at night, the pressure at the user end is greater than the preset wake-up pressure of the water pump, the inverter operating frequency is less than the sleep frequency and the sleep time is reached, and the water pump can enter the sleep program. The outlet pressure regulating tank starts the small flow pressure maintenance function to avoid repeated wake-up of the water pump due to small flow water consumption, which causes energy waste. When the pressure at the user end is less than the wake-up pressure, the water pump can be awakened and enter the working state.

[0038] 4) Equipment shutdown protection mainly includes negative pressure shutdown protection, water tank no water shutdown protection, flooding shutdown protection, overpressure shutdown protection, and pipe burst shutdown protection.

[0039] 4.1) Negative pressure protection: When the municipal pressure is lower than the negative pressure lower limit, the equipment will shut down and alarm; when the municipal pressure recovers to be greater than the negative pressure release value, the equipment will start running.

[0040] 4.2) Waterless protection: When the tank liquid level is lower than the ultra-low level, the equipment will stop and alarm. When the tank liquid level is higher than the ultra-low level, the equipment will start to run.

[0041] 4.3) Flooding alarm: When the liquid level relay detects the flooding alarm signal, the equipment will shut down and alarm, and the inlet and outlet electric valves can be closed. Manual reset.

[0042] 4.4) Overpressure protection: When the outlet pressure exceeds the upper limit set by the pressure switch, the equipment will shut down and alarm. When the outlet pressure is lower than the wake-up pressure, the equipment will resume automatic operation.

[0043] 4.5) Pipe burst protection: The system detects that the number of pumps in operation exceeds the designed system flow, and the outlet pressure still cannot meet the set value, and the equipment stops and alarms. Manual reset.

[0044] 1) When the municipal water supply network has sufficient pressure, the solenoid valve of the flow tank is closed, and the flow tank maintains and stabilizes the pressure of the water from the municipal water supply network, and uses the pressure of the municipal water supply network to deliver water to the water point to complete the water supply. During the entire water supply process, the water pump unit is not activated to avoid energy loss due to useless work;

[0045] 2) When the municipal water supply network pressure is insufficient, the solenoid valve is closed, the flow stabilizing tank maintains and stabilizes the water pressure of the municipal water supply network, and the water pump unit performs superimposition treatment on the water in the flow stabilizing tank and delivers the water to the water point to complete the water supply process. In the entire water supply process, the original pressure of the municipal water supply network can be utilized to the greatest extent, reducing the working pressure of the water pump unit;

[0046] 3) When the municipal water supply network is insufficient in the peak water consumption area, the flow tank will perform differential compensation. The solenoid valve is closed, so that the flow tank remains sealed when the liquid level in the tank drops. The gas medium pressure in the flow tank is used for rapid automatic compensation. The working pressure of the water pump unit is reduced;

[0047] 4) When the municipal water supply network is seriously insufficient or stops supplying water, the pressure in the flow stabilization tank gradually decreases. When the pressure in the flow stabilization tank decreases to a certain value, the pressure sensor sends an electrical signal to open the solenoid valve to quantify and eliminate the negative pressure generated in the water supply system. Avoid damage to non-negative pressure water supply equipment and effectively protect the municipal water supply network. The flow stabilization tank pressure sensor monitors the changes in the pressure in the tank at any time and sends a signal. By controlling the opening and closing of the solenoid valve, a portion of the gas medium is always maintained in the tank. When the water supply equipment fails or anomalies occur, and the water supply system produces overpressure or water hammer, the gas medium can effectively reduce the water pressure shock caused by the overpressure or water hammer phenomenon to a certain extent, avoiding damage to the non-negative pressure water supply equipment.

[0048] A numerically controlled superimposed pressure compensation integrated non-negative pressure water supply equipment integrates the control system into the equipment as a whole to realize a truly integrated non-negative pressure water supply equipment. A set of equipment can meet the different requirements of water pressure in low-lying areas, high-lying areas and ultra-high-lying areas by adopting the superimposed pressure method, greatly reducing the equipment footprint and the equipment and pump room construction costs. It can realize manual, automatic, remote start or a combination of several methods. The inverter speed control is used to intelligently and quickly adjust the water supply pressure and switch the working state of the equipment according to the actual water demand to achieve the purpose of high efficiency and energy saving. The pump group is rotated regularly and the start-first-stop is used to extend the service life of the pump group and reduce maintenance costs. The outlet pressure regulating tank can eliminate the outlet pressure fluctuation, eliminate the error between the outlet pressure and the set pressure through PID calculation, and the control accuracy of the set pressure and the actual pressure is ≤0.01Mpa, and it has a small flow pressure maintenance function. The flow stabilizing tank automatically compensates for the pressure of the municipal pipe network. In addition, the limit value of eliminating negative pressure can be adjusted, and the negative pressure generated by the flow stabilizing tank of the water supply equipment in actual production can be quantitatively eliminated to effectively prevent damage to the water supply equipment and the municipal pipe network. Improve the energy saving and safety of water supply equipment. At the same time, it enhances the stability of the process and shortens the product changeover time, which is of great significance to improving production efficiency.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A numerically controlled superimposed compensation integrated non-negative pressure water supply device, comprising a tank body (1), characterized in that: The tank body (1) is connected to a water inlet manifold (3), and a low-zone water supply pump group (5) and a middle-zone water supply pump group (8) are connected in parallel to the water inlet manifold (3). One end of the low-zone water supply pump group (5) and the middle-zone water supply pump group (8) away from the water inlet manifold (3) is connected to a low-zone water outlet pipe (13), and the low-zone water outlet pipe (13) is connected to a high-zone water supply mechanism, and the high-zone water supply mechanism includes a high-zone water supply pump (12) and a stacking pump group (9) connected in parallel. The high-zone water supply pump (12) ) and the stacking pump group (9) is connected to a high zone water outlet pipe (11) at one end away from the low zone water outlet pipe (13), and a pressure monitoring device (7) and a pressure protection device (10) are installed on the high zone water outlet pipe (11) and the low zone water outlet pipe (13). A water inlet (2), a pressure monitoring device (7) and a solenoid valve (4) are respectively installed on the front wall of the tank body (1), and an air pressure tank (6) is also installed on the high zone water outlet pipe (11) and the low zone water outlet pipe (13). A control system is also included.

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