CN205224181U - Full -automatic constant pressure water supply control system of water pump - Google Patents

Abstract

The utility model relates to a water pump automatic constant pressure water supply control system. In order to overcome the shortcomings of the existing water supply system, such as waste of water resources, short service life of equipment, and easy damage of pressure sensors, the utility model provides such a fully automatic constant pressure water supply control system for water pumps, including PLC, low-voltage electrical control components, and water pumps. Group, water outlet main pipe, frequency converter and pressure sensor. The pressure sensor is installed on the water outlet main pipe of the water supply system. The input module of PLC is respectively connected with the signal output end of the pressure sensor and the signal feedback end of the frequency converter. The PLC output module is respectively connected with the low-voltage electrical The control components and the frequency converter signal receiving end are connected. The utility model achieves the effects of saving water resources, long service life of equipment, pressure sensor is not easy to be completely damaged, and long service life.

Description

A water pump automatic constant pressure water supply control system

technical field

The utility model relates to a control system, in particular to a water pump automatic constant pressure water supply control system.

Background technique

At present, the water pressure of most urban pipe networks can only guarantee the water use of buildings below 6 floors, and the water pressure of the remaining upper floors must be "raised" to meet the water requirements. In the past, most of the traditional water towers and high-level water tanks were used. Due to the growth of microorganisms and algae in the water tanks, secondary pollution will be caused; moreover, the water tanks need to occupy a large space and require a special place for placement.

Although the water supply system in many areas will also meet the user's water supply pressure requirements through secondary pressurization through the municipal pipe network, in the community water supply system, the booster pump usually determines the corresponding pressure by using the water pressure requirements of the least water point. Head design, and then the pump set is selected according to the flow change, and the operation mode of the pump is determined. However, due to the obvious changes in seasons and periods of water use in the community, the daily water supply operation control often adopts the adjustment of the operation mode of the water pump and the opening of the outlet valve to adjust the water volume and pressure of the water supply. A large amount of energy is wasted due to the consumption of the outlet valve, and the system is frequent Starting and stopping the pump will seriously affect the service life of the water pump, motor and switching devices.

Utility model content

(1) Technical problems to be solved

In order to overcome the shortcomings of the existing water supply system, such as waste of water resources, short service life of the equipment, and easy damage of the pressure sensor, the technical problem to be solved by the utility model is to provide a water saving, long service life of the equipment, and the pressure sensor is not easy Damaged water pump automatic constant pressure water supply control system.

(2) Technical solution

In order to solve the above technical problems, the utility model provides such a water pump automatic constant pressure water supply control system, including PLC, low-voltage electrical control components, water pump group, water outlet main pipe, frequency converter and pressure sensor, the pressure sensor is installed in the water supply On the outlet main pipe of the system, the PLC input module is connected to the signal output terminal of the pressure sensor and the signal feedback terminal of the frequency converter, and the PLC output module is respectively connected to the low-voltage electrical control components and the signal receiving terminal of the frequency converter; one end of the water pump group is connected to the low-voltage The electrical control components are connected, and the other end is connected to the water outlet main pipe; the pressure sensor includes a pressure plate, a shell, a connecting rod, a copper plate, a copper wire column I, a pressure sensing plate, a distance sensor, an elastic piece and a copper wire column II, and the inner bottom of the housing There are copper wire column Ⅰ and copper wire column Ⅱ on both sides respectively, and the bottom of the shell between copper wire column Ⅰ and copper wire column Ⅱ is equipped with a pressure sensing plate. The sensing plate is also provided with a distance sensor, the upper end of the elastic member is connected with the copper plate, the center of the upper surface of the copper plate is provided with a connecting rod, and the upper end of the connecting rod is connected with a pressure plate, the pressure plate, connecting rod, copper plate, copper wire column I, pressure sensing plate, The distance sensor, the elastic piece and the copper wire column II are all in the housing.

Preferably, the water pump group includes 2-6 water pumps.

Preferably, the low voltage electrical control components include relays and contactors.

Working principle: When the above-mentioned constant pressure water supply control system is working, the pressure sensor first converts the real-time measured pressure, flow and non-electricity signals on the outlet main pipe into electrical signals, and inputs them to the input module of the PLC. The above signals are processed by the CPU of the PLC. After comparing with the set signal, the optimal operating condition parameters are obtained. The output module of the PLC outputs the logic control command and the frequency setting value of the frequency converter, and controls the number of running pumps and the frequency of the inverter through the relay and contactor. At the same time, the frequency converter will feed back the output frequency signal to the PLC as frequency detection and control to realize the adjustment and control of each pump, so as to achieve the purpose of stabilizing the pressure of the outlet main pipe at the set value.

When the pressing plate of the pressure sensor is under pressure, it moves downward, so the copper plate also moves downward. At this time, the copper wire column I and copper wire column II below the copper plate conduct electricity. According to the length of the copper wire column I and copper wire column II below the copper plate, the electrical signal is fed back to detect the pressure on the pressure plate. When the copper wire column I and the copper wire column II are broken, the pressure sensing board can also detect the change of pressure, which can play a double protection role. The distance sensor can detect the falling distance of the copper plate, and the pressure on the pressure plate can also be detected through the falling distance of the copper plate, which plays the role of triple protection.

(3) Beneficial effect

The utility model overcomes the disadvantages of wasting water resources in the existing water supply system, the service life of the equipment is short, and the pressure sensor is easily damaged. The utility model achieves the saving of water resources, and the service life of the equipment is long. Effect.

Description of drawings

Fig. 1 is the system schematic diagram of the utility model.

Fig. 2 is a structural schematic diagram of the pressure sensor.

The marks in the drawings are: 1-PLC, 2-low-voltage electrical control components, 3-water pump group, 4-outlet main pipe, 5-frequency converter, 6-pressure sensor, 61-press plate, 62-housing, 63- Connecting rod, 64-copper plate, 65-copper wire column I, 66-pressure sensing plate, 67-distance sensor, 68-elastic piece, 69-copper wire column II.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Example 1

A water pump automatic constant pressure water supply control system, as shown in Figure 1-2, includes PLC1, low-voltage electrical control components 2, water pump group 3, water outlet main pipe 4, frequency converter 5 and pressure sensor 6, and pressure sensor 6 is installed On the outlet main pipe 4 of the water supply system, the input module of PLC1 is respectively connected with the signal output terminal of the pressure sensor 6 and the signal feedback terminal of the frequency converter 5, and the output module of PLC1 is respectively connected with the low-voltage electrical control component 2 and the signal receiving terminal of the frequency converter 5 One end of the water pump group 3 is connected to the low-voltage electrical control component 2, and the other end is connected to the water outlet main pipe 4; the pressure sensor 6 includes a pressure plate 61, a housing 62, a connecting rod 63, a copper plate 64, a copper wire column I 65, and a pressure sensing plate 66. Distance sensor 67, elastic member 68 and copper wire column II 69, copper wire column I 65 and copper wire column II 69 are respectively arranged on both sides of the inner bottom of the housing 62, and the shell between copper wire column I 65 and copper wire column II 69 The bottom of 62 is provided with a pressure sensing plate 66, the pressure sensing plate 66 is provided with an elastic member 68, the pressure sensing plate 66 is also provided with a distance sensor 67, the upper end of the elastic member 68 is connected with the copper plate 64, and the center of the upper surface of the copper plate 64 There is a connecting rod 63, the upper end of the connecting rod 63 is connected with a pressure plate 61, the pressure plate 61, the connecting rod 63, the copper plate 64, the copper wire column I 65, the pressure sensing plate 66, the distance sensor 67, the elastic piece 68 and the copper wire column II 69 are all in the Inside the housing 62.

The water pump group 3 includes 2 water pumps.

The low-voltage electrical control components 2 include relays and contactors.

When the above-mentioned constant pressure water supply control system is working, the pressure sensor 6 first converts the real-time measured pressure and flow non-electricity signals on the water outlet main pipe 4 into electrical signals, and inputs them to the input module of PLC1. After the above-mentioned signals are processed by the CPU of PLC1 Comparing and calculating with the set signal to obtain the best operating condition parameters, the output module of PLC1 outputs the logic control command and the frequency setting value of the frequency converter 5, and controls the number of operating units of the water pump group 3 through relays and contactors and the operating conditions of variable pumps. At the same time, the frequency converter 5 feeds back the output frequency signal to PLC1 as frequency detection and control to realize the adjustment and control of each pump, so that the pressure of the water outlet main pipe 4 is stabilized at the set value. Purpose.

When the pressing plate 61 of the pressure sensor 6 is under pressure, it moves downward, so the copper plate 64 also moves downward. At this time, the copper wire column I65 and the copper wire column II69 below the copper plate 64 conduct electricity. The electrical signal is fed back according to the length of the copper wire column I 65 and the copper wire column II 69 below the copper plate 64 to detect the pressure on the pressure plate 61 . When the copper wire column I 65 and the copper wire column II 69 are broken, the pressure sensing board 66 can also detect the change of pressure, which can play a double protection role. The distance sensor 67 can detect the falling distance of the copper plate 64, and the pressure on the pressing plate 61 can also be detected by the falling distance of the copper plate 64, which plays the role of triple protection.

Example 2

A water pump automatic constant pressure water supply control system, as shown in Figure 1-2, includes PLC1, low-voltage electrical control components 2, water pump group 3, water outlet main pipe 4, frequency converter 5 and pressure sensor 6, and pressure sensor 6 is installed On the outlet main pipe 4 of the water supply system, the input module of PLC1 is respectively connected with the signal output terminal of the pressure sensor 6 and the signal feedback terminal of the frequency converter 5, and the output module of PLC1 is respectively connected with the low-voltage electrical control component 2 and the signal receiving terminal of the frequency converter 5 One end of the water pump group 3 is connected to the low-voltage electrical control component 2, and the other end is connected to the water outlet main pipe 4; the pressure sensor 6 includes a pressure plate 61, a housing 62, a connecting rod 63, a copper plate 64, a copper wire column I 65, and a pressure sensing plate 66. Distance sensor 67, elastic member 68 and copper wire column II 69, copper wire column I 65 and copper wire column II 69 are respectively arranged on both sides of the inner bottom of the housing 62, and the shell between copper wire column I 65 and copper wire column II 69 The bottom of 62 is provided with a pressure sensing plate 66, the pressure sensing plate 66 is provided with an elastic member 68, the pressure sensing plate 66 is also provided with a distance sensor 67, the upper end of the elastic member 68 is connected with the copper plate 64, and the center of the upper surface of the copper plate 64 There is a connecting rod 63, the upper end of the connecting rod 63 is connected with a pressure plate 61, the pressure plate 61, the connecting rod 63, the copper plate 64, the copper wire column I 65, the pressure sensing plate 66, the distance sensor 67, the elastic piece 68 and the copper wire column II 69 are all in the Inside the housing 62.

The water pump group 3 includes 4 water pumps.

The low-voltage electrical control components 2 include relays and contactors.

When the above-mentioned constant pressure water supply control system is working, the pressure sensor 6 first converts the real-time measured pressure and flow non-electricity signals on the water outlet main pipe 4 into electrical signals, and inputs them to the input module of PLC1. After the above-mentioned signals are processed by the CPU of PLC1 Comparing and calculating with the set signal to obtain the best operating condition parameters, the output module of PLC1 outputs the logic control command and the frequency setting value of the frequency converter 5, and controls the number of operating units of the water pump group 3 through relays and contactors and the operating conditions of variable pumps. At the same time, the frequency converter 5 feeds back the output frequency signal to PLC1 as frequency detection and control to realize the adjustment and control of each pump, so that the pressure of the water outlet main pipe 4 is stabilized at the set value. Purpose.

When the pressing plate 61 of the pressure sensor 6 is under pressure, it moves downward, so the copper plate 64 also moves downward. At this time, the copper wire column I65 and the copper wire column II69 below the copper plate 64 conduct electricity. The electrical signal is fed back according to the length of the copper wire column I 65 and the copper wire column II 69 below the copper plate 64 to detect the pressure on the pressure plate 61 . When the copper wire column I 65 and the copper wire column II 69 are broken, the pressure sensing board 66 can also detect the change of pressure, which can play a double protection role. The distance sensor 67 can detect the falling distance of the copper plate 64, and the pressure on the pressing plate 61 can also be detected by the falling distance of the copper plate 64, which plays the role of triple protection.

Example 3

A water pump automatic constant pressure water supply control system, as shown in Figure 1-2, includes PLC1, low-voltage electrical control components 2, water pump group 3, water outlet main pipe 4, frequency converter 5 and pressure sensor 6, and pressure sensor 6 is installed On the outlet main pipe 4 of the water supply system, the input module of PLC1 is respectively connected with the signal output terminal of the pressure sensor 6 and the signal feedback terminal of the frequency converter 5, and the output module of PLC1 is respectively connected with the low-voltage electrical control component 2 and the signal receiving terminal of the frequency converter 5 One end of the water pump group 3 is connected to the low-voltage electrical control component 2, and the other end is connected to the water outlet main pipe 4; the pressure sensor 6 includes a pressure plate 61, a housing 62, a connecting rod 63, a copper plate 64, a copper wire column I 65, and a pressure sensing plate 66. Distance sensor 67, elastic member 68 and copper wire column II 69, copper wire column I 65 and copper wire column II 69 are respectively arranged on both sides of the inner bottom of the housing 62, and the shell between copper wire column I 65 and copper wire column II 69 The bottom of 62 is provided with a pressure sensing plate 66, the pressure sensing plate 66 is provided with an elastic member 68, the pressure sensing plate 66 is also provided with a distance sensor 67, the upper end of the elastic member 68 is connected with the copper plate 64, and the center of the upper surface of the copper plate 64 There is a connecting rod 63, the upper end of the connecting rod 63 is connected with a pressure plate 61, the pressure plate 61, the connecting rod 63, the copper plate 64, the copper wire column I 65, the pressure sensing plate 66, the distance sensor 67, the elastic piece 68 and the copper wire column II 69 are all in the Inside the housing 62.

The water pump group 3 includes 6 water pumps.

The low-voltage electrical control components 2 include relays and contactors.

When the above-mentioned constant pressure water supply control system is working, the pressure sensor 6 first converts the real-time measured pressure and flow non-electricity signals on the water outlet main pipe 4 into electrical signals, and inputs them to the input module of PLC1. After the above-mentioned signals are processed by the CPU of PLC1 Comparing and calculating with the set signal to obtain the best operating condition parameters, the output module of PLC1 outputs the logic control command and the frequency setting value of the frequency converter 5, and controls the number of operating units of the water pump group 3 through relays and contactors and the operating conditions of variable pumps. At the same time, the frequency converter 5 feeds back the output frequency signal to PLC1 as frequency detection and control to realize the adjustment and control of each pump, so that the pressure of the water outlet main pipe 4 is stabilized at the set value. Purpose.

When the pressing plate 61 of the pressure sensor 6 is under pressure, it moves downward, so the copper plate 64 also moves downward. At this time, the copper wire column I65 and the copper wire column II69 below the copper plate 64 conduct electricity. The electrical signal is fed back according to the length of the copper wire column I 65 and the copper wire column II 69 below the copper plate 64 to detect the pressure on the pressure plate 61 . When the copper wire column I 65 and the copper wire column II 69 are broken, the pressure sensing board 66 can also detect the change of pressure, which can play a double protection role. The distance sensor 67 can detect the falling distance of the copper plate 64, and the pressure on the pressing plate 61 can also be detected by the falling distance of the copper plate 64, which plays the role of triple protection.

The above-mentioned embodiments only express the preferred implementation of the utility model, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the utility model. It should be pointed out that those skilled in the art can make several modifications, improvements and substitutions without departing from the concept of the present invention, all of which belong to the protection scope of the present utility model. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (3)

1. a water pump fully-automatic constant pressure water management system, it is characterized in that, include PLC (1), low-voltage electrical balancing boom device (2), water pump group (3), outfall sewer (4), frequency converter (5) and pressure sensor (6), pressure sensor (6) is arranged on the outfall sewer (4) of water system, the input module of PLC (1) respectively with the signal output part of pressure sensor (6), the signal feedback end of frequency converter (5) is connected, PLC (1) output module respectively with low-voltage electrical balancing boom device (2), frequency converter (5) signal receiving end is connected, water pump group (3) one end is connected with low-voltage electrical balancing boom device (2), and the other end connects outfall sewer (4), pressure sensor (6) includes pressing plate (61), housing (62), connecting rod (63), copper coin (64), copper cash post I (65), pressure sensing plate (66), range sensor (67), elastic component (68) and copper cash post II (69), the both sides of housing (62) inner bottom part are respectively equipped with copper cash post I (65) and copper cash post II (69), housing (62) bottom between copper cash post I (65) and copper cash post II (69) is provided with pressure sensing plate (66), pressure sensing plate (66) is provided with elastic component (68), pressure sensing plate (66) is also provided with range sensor (67), elastic component (68) upper end is connected with copper coin (64), the central authorities of copper coin (64) upper surface are provided with connecting rod (63), connecting rod (63) upper end is connected with pressing plate (61), pressing plate (61), connecting rod (63), copper coin (64), copper cash post I (65), pressure sensing plate (66), range sensor (67), elastic component (68) and copper cash post II (69) are all in housing (62).

2. a kind of water pump fully-automatic constant pressure water management system according to claim 1, it is characterized in that, water pump group (3) comprises 2-6 platform water pump.

3. a kind of water pump fully-automatic constant pressure water management system according to claim 1, it is characterized in that, low-voltage electrical balancing boom device (2) comprises relay and contactor.