CN205636910U - Public water supply equipment who is equipped with pump has been increased - Google Patents

Abstract

The utility model relates to a water supply equipment added with a public backup pump, comprising a public backup pump, an electric three-way ball valve, a flow limiting valve, at least one low-zone booster pump and at least one high-zone booster pump; One low zone booster pump constitutes a low zone booster unit, and at least one high zone booster pump forms a high zone booster unit; when there is more than one low zone booster pump, all low zone booster pumps are connected in parallel; When there is more than one booster pump, all booster pumps in the high area are connected in parallel; the utility model has a remarkable energy-saving effect, because the energy consumption per unit of small flow rate of the secondary supply equipment is too high, and the energy-saving operation of small flow rate has a greater contribution rate to the overall average energy saving. Especially when the design flow rate is too large, resulting in a large selection of equipment, and when the occupancy rate is low, the energy saving effect is better. The public backup pump of the utility model can be used as a public backup pump in the high and low areas, saves one booster pump in the low area, realizes energy-saving operation at low cost, and has good technical and economical efficiency.

Description

A kind of water supply equipment with added public standby pump

technical field

The utility model relates to a water supply equipment, in particular to a method for improving the operation conditions of pumps for water supply equipment in each section of a high-rise building, which can avoid or reduce the low-efficiency operation conditions of medium and small flows, and realize the increase of energy-saving operation of water supply equipment for high-rise buildings. Water supply equipment with a common backup pump.

Background technique

Usually, the water supply of high-rise buildings is divided into high and low sections according to the vertical direction. Each vertical section uses a set of independent water supply equipment, which is not related to each other. Since the domestic water supply is characterized by a large flow range, the water supply time for small and medium flows Long, the water supply time is short during the peak period, and the water supply equipment is designed and selected according to the maximum flow rate, which causes the supporting water pumps of the water supply equipment in each district to be in the medium and small flow conditions for a long time, with low efficiency and high energy consumption. This is one of the main reasons for the high energy consumption of water supply equipment in high-rise buildings.

For ordinary centrifugal pumps, when the rated flow rate is about 25%, the pump efficiency is about half of the rated point, which means that under the same water supply conditions, the energy consumption of small flow water supply is twice that of large flow water supply. It can be seen that by trying to improve the working conditions of the secondary water supply equipment and avoiding or reducing the small and medium flow conditions, there is a great potential for energy saving.

Utility model content

In view of the above problems, the main purpose of this utility model is to provide a method for improving the operating conditions of the water supply equipment in each zone of high-rise buildings, which can avoid or reduce the low-efficiency operating conditions of medium and small flows, and realize energy-saving operation of high-rise building water supply equipment. Added water supply equipment for public backup pumps.

The utility model solves the above-mentioned technical problems through the following technical scheme: a water supply equipment with a public backup pump added. The water supply equipment with a public backup pump includes: a public backup pump, an electric three-way ball valve , flow limiting valve, at least one low zone booster pump and at least one high zone booster pump; said at least one low zone booster pump forms a low zone booster unit, and said at least one high zone booster pump pressure pumps to form a high-zone booster unit; when there is more than one low-zone booster pump, all low-zone booster pumps are connected in parallel; when there is more than one high-zone booster pump, all high-zone booster pumps are connected in parallel; the common backup pump In parallel connection with the booster unit in the high area, the water inlet and outlet of the public standby pump are divided into two circuits, and the two circuits of the water inlet of the public standby pump are respectively connected to one end of the flow limiting valve and the water inlet main pipe; The two outlet ports of the pump are respectively connected to the first port of the electric three-way ball valve and the water supply pipe in the high area; the second port of the electric three-way ball valve is connected to the other end of the restrictor valve; the second port of the electric three-way ball valve Three ports are connected to the low zone water supply hose.

In a specific implementation example of the utility model, the flow limiting valve is a hydraulic flow limiting valve or an electric control valve.

In a specific implementation example of the utility model, a pressure gauge and a pressure sensor are installed on the water inlet main pipe.

In a specific implementation example of the present utility model, pressure gauges and pressure sensors are installed on the water supply pipes in the high area and the water supply pipes in the low area.

In a specific implementation example of the present utility model, a check valve is installed on the pipeline where the water inlet end of the public standby pump is connected with the water inlet main pipe.

In a specific implementation example of the present utility model, a check valve and a maintenance valve are installed on the pipelines connecting the common standby pump, the high-zone booster unit and the high-zone water supply pipe.

In a specific implementation example of the present utility model, a check valve and a maintenance valve are installed on the pipeline connecting the low zone booster unit and the low zone water supply pipe.

The positive progress effect of the utility model is that: the water supply equipment provided by the utility model with the addition of a public standby pump has the following advantages:

(1) The energy saving effect of the utility model is remarkable, because the unit energy consumption of the small flow rate of the secondary supply equipment is too high, and the contribution rate of the energy saving operation of the small flow rate to the overall average energy saving is greater, especially when the design flow rate is too large and the equipment selection is large When the occupancy rate is low, the energy saving effect is better.

(2) The utility model can also realize low-noise operation at night, because it belongs to the minimum flow for long-distance travel at night, the head of the booster pump in the low area is low, and the public backup pump is more or less based on the pressure difference in the area, and the low-speed cloud operation has a higher lift. Low for generally low-noise operation at night.

(3) The public backup pump of the present invention can be used as a public backup pump in the high and low areas, saving one booster pump in the low area, realizing energy-saving operation at low cost, and having good technical and economical efficiency.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the utility model.

detailed description

The preferred embodiments of the utility model are given below in conjunction with the accompanying drawings to describe the technical solution of the utility model in detail.

Fig. 1 is the overall structure schematic diagram of the present utility model, as shown in Fig. 1, the water supply equipment that the utility model provides has increased the public backup pump, including a public backup pump 3, electric three-way ball valve 9, flow limiting valve 2, At least one low-zone booster pump and at least one high-zone booster pump; at least one low-zone booster pump 1 forms a low-zone booster unit, and at least one high-zone booster pump 4 forms a high-zone booster unit; When there is more than one booster pump in the low zone, all the booster pumps in the low zone are connected in parallel; when there is more than one booster pump in the high zone, all the booster pumps in the high zone are connected in parallel; the common backup pump 3 and the booster unit in the high zone are connected in parallel, The water inlet end and the water outlet end of the public standby pump 3 are divided into two circuits, and the two circuits of the water inlet end of the public standby pump 3 are respectively connected with one end of the flow limiting valve 2 and the water inlet main pipe; the water outlet of the public standby pump 3 The two lines at the end are respectively connected with the first port of the electric three-way ball valve 9 and the water supply pipe in the high area; the second port of the electric three-way ball valve 9 is connected with the other end of the restrictor valve 2; Three ports are connected to the low zone water supply hose.

In a specific implementation process, the restrictor valve 2 can be selected as a hydraulic restrictor valve or an electric control valve.

Pressure gauge 7 and pressure sensor 8 are installed on the main water inlet;

A check valve 6 is installed on the pipeline connecting the water inlet end of the public standby pump 3 and the water inlet main pipe; a check valve 6 is installed on the pipeline connecting the public standby pump 3, the booster unit in the high zone and the water supply pipe in the high zone and maintenance valve 5; a check valve 6 and a maintenance valve 5 are installed on the pipeline connecting the low zone booster unit and the low zone water supply pipe.

When the water is supplied with small flow in the high and low areas, the AC port of the electric three-way ball valve 9 is controlled to be opened (port B is blocked), and only one booster pump 1 in the low area is started, which supplies water for the low area with small flow, It is also used as the pre-stage pressurization of the small flow water supply in the high area (part of the flow of the booster pump 1 in the low area passes through the AC channel of the three-way ball valve 9, the flow limiting valve 2 flows to the inlet of the common standby pump 3, and is again fed by the common standby pump 3 Pressurization), in this way, the outlet flow of the booster pump 1 in the low area is the sum of the flow in the high and low areas. Due to the expanded working flow, the operating efficiency of the pump can be greatly improved. As for the small-flow water supply in the high area, the pre-stage supercharging has obtained higher efficiency, and the post-stage supercharging is made up by the public backup pump 3 on the basis of the low-area pressure by frequency conversion to make up for the difference, and higher efficiency can also be obtained.

The operation process of the above-mentioned small flow water supply not only greatly improves the flow rate expansion efficiency of the pump in the low area, but also improves the efficiency of the pump in the high area due to the operation of reduced frequency and pressure. For example, according to the information provided by the Grundfos selection software, the Fu CR20-8 pump, when its working flow is equal to 25% of the rated flow, the pump efficiency is 42% and the total efficiency of the pump motor is 36% when it runs at a constant pressure of 100 meters.

When running at a constant pressure of 60 meters, the pump efficiency increases to 48.4%, and the total efficiency of the pump motor increases to 42.7%; when running at a constant pressure of 30 meters, the pump efficiency increases to 56.8%, and the total efficiency of the pump motor increases to 52.5%.

When the user flow in the high and low areas increases to a certain extent, the general principle is greater than 50% of the rated flow of the booster pump in the high and low areas, or when the booster pump in the high and low areas enters the high-efficiency area, the flow limiting valve 2 will automatically close. At this time, the inlet water source of the public standby pump 3 is automatically switched to the water inlet main pipe of the equipment. In order to make the service time of each pump uniform, it is also possible to control the shutdown of each pump in operation, and replace it with another booster pump in the high and low areas and put it into operation.

To sum up, the aforementioned low-flow energy-saving operation mode does not affect the independent operation of the booster units in the high and low areas at high flow rates, and it is obviously natural and simple to switch from the large-flow independent operation mode to the low-flow energy-saving operation mode.

The flow limiting valve 2 shown in Figure 1 can be hydraulically driven. When the public standby pump 3 is running with a small flow rate, the flow limiting valve is in the open state, and the water source of the public standby pump 3 comes from the water outlet main pipe in the low area. When the outlet water flow of pump 3 is higher than the rated value of the flow limiting valve, the flow limiting valve will automatically close, and the inlet water source of the public backup pump 3 will automatically switch to the water inlet main pipe of the equipment. The flow rate and pressure ratio are used to control the opening and closing of the internal action elements of the valve.

For the equipment shown in Figure 1, the booster units in the high and low areas can be equipped with more booster pumps (only two are drawn in the figure).

The control principle for realizing energy-saving operation is: when water is supplied with small flow in the high and low areas, the general principle is less than 50% of the rated flow of the booster pump in the high and low areas, and the equipment operates in the aforementioned low-flow energy-saving mode. When the user flow in the high and low areas increases to a certain extent, the general principle is that it is greater than 50% of the rated flow of the booster pump in the high and low areas, or when it is enough to make the booster pump in the high and low areas enter the high efficiency area, the aforementioned energy-saving operation mode is abandoned. The pressurized units in the high and low areas respectively use the equipment water inlet main pipe as the water source to pressurize and supply water to serve their respective zones.

When the flow of users in the high and low areas increases further and exceeds the rated flow of the booster pump in the high and low areas, when it is necessary to add pumps in parallel for water supply, since the user flow in the high and low areas generally does not increase synchronously, it is possible to introduce the aforementioned energy-saving operation mode again: Start the public standby pump 3, use the outlet main pipe of the booster unit in the low area as the water source, and provide part of the flow for the water supply in the high area. No matter how the flow in the high and low areas changes, the control and scheduling of the pumps should make the flow distribution reasonable, so that all the pumps are in high efficiency. The area is the principle.

In the equipment shown in Figure 1, the public standby pump 3 is used as the public standby pump for the high and low zones. When the pumps in the high and low zones are in good condition, the AC port of the electric three-way ball valve 9 is controlled to open (port B is blocked). The operation control of the equipment is as follows: As mentioned above, at this time, the common standby pump 3 and the booster pump 4 in the high zone can be used as backups for each other. When a faulty pump occurs in the low zone, the BC port of the electric three-way ball valve 9 is controlled to open (port A is blocked). The standby pump 3 operates according to the target value of constant pressure in the low zone with frequency conversion and speed regulation, and can be used as a standby pump in the low zone.

The utility model has remarkable energy-saving effect, because the energy consumption per unit of small flow of the secondary supply equipment is too high, and the energy-saving operation of small flow contributes more to the overall average energy saving. When the rate is low, the energy-saving effect is better.

It can also realize low-noise operation at night, because the night is the minimum flow for long-distance travel, the head of the booster pump in the low area is low, and the public backup pump 3 is based on the difference in regional pressure. Low noise operation at night.

The public backup pump 3 of the utility model can be used as a public backup pump in the high and low areas, saves one low area booster pump, realizes energy-saving operation at low cost, and has good technical and economical efficiency.

The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model, and the claimed protection scope of the utility model is defined by the appended claims and their equivalents.

Claims (7)

1. the supply equipment adding public standby pump, it is characterised in that: the described supply equipment adding public standby pump includes: one is public for pump, electric three passes ball valve, flow-limiting valve, at least one Tai Di district booster pump and at least Yi Taigao district booster pump；At least one described Tai Di district booster pump forms low district's supercharging unit, and described at least Yi Taigao district booster pump forms high district's supercharging unit；When low district booster pump is more than one, all of low district booster pumps connected in parallel；When high district booster pump is more than one, all of high district booster pumps connected in parallel；Public standby Beng Hegao district supercharging unit is in parallel, and the inlet end of public standby pump and water outlet end are all divided into two-way, the two-way of the inlet end of public standby pump to connect with one end and the water inlet manifold of flow-limiting valve respectively；The two-way of the water outlet end of public standby pump connects with the first of electric three passes ball valve port and high district's water supply water pipe respectively；Second port of electric three passes ball valve is connected to the other end of flow-limiting valve；3rd port of electric three passes ball valve is connected on low district's water supply water pipe.

The supply equipment adding public standby pump the most according to claim 1, it is characterised in that: flow-limiting valve is waterpower flow-limiting valve or electrically-controlled valve.

The supply equipment adding public standby pump the most according to claim 1 and 2, it is characterised in that: Pressure gauge and pressure transducer are installed on water inlet manifold.

The supply equipment adding public standby pump the most according to claim 1 and 2, it is characterised in that: it is mounted on Pressure gauge and pressure transducer on high district's water supply water pipe and low district's water supply water pipe.

The supply equipment adding public standby pump the most according to claim 1 and 2, it is characterised in that: on the pipeline that the inlet end of public standby pump and water inlet manifold connect, check-valves is installed.

The supply equipment adding public standby pump the most according to claim 1, it is characterised in that: on the pipeline that public standby pump, high district's supercharging unit connect with high district's water supply water pipe, check-valves and maintenance valve are installed.

The supply equipment adding public standby pump the most according to claim 1, it is characterised in that: on the pipeline that low district's supercharging unit connects with low district's water supply water pipe, check-valves and maintenance valve are installed.