CN203129254U - Non-negative pressure variable frequency water supply device - Google Patents

Abstract

The utility model provides a non-negative pressure frequency conversion water supply equipment, which belongs to the technical field of machinery. It solves the problems of poor reliability and high energy consumption of existing water supply equipment. The non-negative pressure frequency conversion water supply equipment includes a frequency conversion control cabinet, a water inlet pipe, a water outlet pipe and several water pumps. Several water pumps are connected in parallel between the water inlet pipe and the water outlet pipe, and each water pump is connected with the frequency conversion control cabinet. The water inlet of the water inlet pipe A non-negative pressure tank capable of storing water is fixed at the end, and a liquid level sensor connected to the frequency conversion control cabinet is installed in the non-negative pressure tank. The pressure sensor connected to the cabinet. The non-negative pressure frequency conversion water supply equipment has the advantages of energy saving, good reliability and the like.

Description

Non-negative pressure frequency conversion water supply equipment

technical field

The utility model belongs to the technical field of machinery and relates to water supply equipment, in particular to a non-negative pressure frequency conversion water supply equipment.

Background technique

In the traditional water supply mode, tap water is transferred from the municipal waterworks first, then put into the water tank from the pipe network, and then supplied to users through a booster pump, which is easy to completely waste the water pressure on the municipal pipe network. And if the water is directly connected to the municipal pipe network through the water pump, it is easy to generate negative pressure, which will affect the water use of other surrounding users.

In view of the above existing problems, people are currently applying frequency conversion speed regulation technology to the secondary pressurized water supply of high-rise buildings. Frequency conversion speed regulation water supply equipment is a technical combination that integrates water pump operation and control circuit automatic control program programming. Or when increasing, the control circuit controls the frequency conversion speed regulation of the water pump to make the water pressure constant, but it still has the problem of large energy consumption. There are also people who have designed non-negative pressure water supply equipment, which installed a steady flow compensator and vacuum suppressor before the pressurized pump group to eliminate negative pressure, but once the municipal pipe network stops water for a short period of time, users will have no water available. Water supply reliability is low.

Contents of the invention

The purpose of this utility model is to provide a non-negative pressure frequency conversion water supply equipment with good reliability and energy saving in order to solve the above problems in the prior art.

The purpose of this utility model can be achieved through the following technical solutions: a non-negative pressure frequency conversion water supply equipment, including frequency conversion control cabinet, water inlet pipe, water outlet pipe and several water pumps, several water pumps are connected in parallel between the water inlet pipe and the water outlet pipe and Each water pump is connected with the frequency conversion control cabinet. It is characterized in that the water inlet end of the water inlet pipe is fixedly connected with a non-negative pressure tank capable of storing water. A connected liquid level sensor, the outlet pipe is fixedly connected with a pressure tank and the outlet end of the outlet pipe is provided with a pressure sensor connected with a frequency conversion control cabinet.

In the above-mentioned non-negative pressure frequency conversion water supply equipment, the water inlet of the water pump is provided with a first valve, the water outlet of the water pump is provided with a check valve, and the outlet end of the check valve is connected with a second valve . Through the first valve and the second valve, the water flow rate can be adjusted according to the actual situation, and the adjustment is convenient.

In the above non-negative pressure frequency conversion water supply equipment, the non-negative pressure tank is made of stainless steel.

In the above non-negative pressure frequency conversion water supply equipment, the water pump is a multi-stage centrifugal pump.

In the above-mentioned non-negative pressure variable frequency water supply equipment, the number of the water pumps is 2 to 6.

Compared with the existing technology, this non-negative pressure frequency conversion water supply equipment replaces the old-fashioned water tanks, water towers, and pools with non-negative pressure tanks, avoiding secondary pollution of drinking water, and at the same time does not generate negative pressure on the municipal tap water pipe network. Under the premise, the original pressure energy of the municipal tap water pipe network is used to the greatest extent, and the number of water pumps or the speed of the water pump can be reduced when compared with ordinary reservoir water absorption, which greatly reduces energy consumption and saves operating costs. The frequency conversion operation realizes the constant pressure of the water supply, which reduces the operating cost on the one hand, and greatly improves the water comfort of the floor users on the other hand.

Description of drawings

Figure 1 is a structural schematic diagram of the non-negative pressure frequency conversion water supply equipment.

In the figure, 1. Frequency conversion control cabinet; 2. Water inlet pipe; 3. Water outlet pipe; 4. Water pump; 5. No negative pressure tank; 6. Liquid level sensor; 7. Pressure tank; 8. Pressure sensor; 9. First Valve; 10, check valve; 11, second valve.

Detailed ways

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

As shown in Figure 1, the non-negative pressure frequency conversion water supply equipment includes a frequency conversion control cabinet 1, a water inlet pipe 2, a water outlet pipe 3 and several water pumps 4, and several water pumps 4 are connected in parallel between the water inlet pipe 2 and the water outlet pipe 3 and each water pump 4 are all connected with the frequency conversion control cabinet 1, and the number of water pumps 4 is 2 to 6, and the number of water pumps 4 in this embodiment is 3, and the water pumps 4 are multi-stage centrifugal pumps. The water inlet end of the water inlet pipe 2 is fixedly connected with a non-negative pressure tank 5 capable of storing water. The non-negative pressure tank 5 is made of stainless steel, and a liquid level sensor connected with the frequency conversion control cabinet 1 is installed in the non-negative pressure tank 5 6. A pressure tank 7 is fixedly connected to the outlet pipe 3 and a pressure sensor 8 connected to the frequency conversion control cabinet 1 is provided at the outlet end of the outlet pipe 3 . The water inlet of the water pump 4 is provided with a first valve 9 , the water outlet of the water pump 4 is provided with a check valve 10 , and the outlet of the check valve 10 is connected with a second valve 11 .

The non-negative pressure tank 5 in the non-negative pressure frequency conversion water supply equipment is directly connected with the municipal tap water pipe network, and the tap water is stored in the non-negative pressure tank 5. When the non-negative pressure frequency conversion water supply equipment is working, the first valve 9 and the second valve 11 is turned on, when the pressure of the municipal tap water pipe network is sufficient, the pressure sensor 8 will detect the pressure detection value of the outlet end of the water outlet pipe 3 and transmit it to the frequency conversion control cabinet 1, and the frequency conversion control cabinet 1 controls the three water pumps 4 to close, and the municipal tap water pipe network The pressure directly supplies water to the user; when the pressure of the municipal tap water pipe network is insufficient, the pressure sensor 8 transmits the pressure detection value of the water outlet to the frequency conversion control cabinet 1, and the frequency conversion control cabinet 1 compares the pressure detection value The pressure value that needs to be increased on the basis of the original pressure of the tap water pipe network, determine the number of water pumps 4 put into operation and the frequency conversion output value of the water pump 4 (the speed of the water pump 4), so as to meet the water consumption curve to achieve constant pressure; when the municipal tap water pipe network is shut down for a short time When the water or water consumption is greater than the water supply, the stored water in the non-negative pressure tank 5 is replenished for the user; when the stored water in the non-negative pressure tank 5 reaches the lower limit, the liquid level sensor 6 transmits the signal to the frequency conversion control cabinet 1, and the frequency conversion The control cabinet 1 turns off the power, and the non-negative pressure frequency conversion water supply equipment stops working. When the municipal tap water network restores pressure and water supply, the water level of the stored water in the non-negative pressure tank 5 rises, and the liquid level sensor 6 transmits the signal to the frequency conversion control Yes, the frequency conversion control cabinet 1 is powered on, and the original non-negative pressure frequency conversion water supply equipment resumes work.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Although the frequency conversion control cabinet 1, water inlet pipe 2, water outlet pipe 3, water pump 4, non-negative pressure tank 5, liquid level sensor 6, pressure tank 7, pressure sensor 8, first valve 9, check valve 10. Terms such as the second valve 11, but the possibility of using other terms is not excluded. These terms are only used to describe and explain the essence of the utility model more conveniently; interpreting them as any kind of additional limitation is contrary to the spirit of the utility model.

Claims (5)

1. non-negative pressure frequency-changing water supply device, comprise variable frequency control cabinet (1), water inlet pipe (2), outlet pipe (3) and several water pumps (4), several water pumps (4) are parallel between water inlet pipe (2) and the outlet pipe (3) and each water pump (4) all links with variable frequency control cabinet (1), it is characterized in that, the water inlet end of described water inlet pipe (2) is fixed with the pot with no negative pressure (5) of energy water storage, be provided with in the described pot with no negative pressure (5) and the joining liquid level sensor of variable frequency control cabinet (1) (6), the water side that is fixed with pressurized tank (7) and outlet pipe (3) on the described outlet pipe (3) is provided with and the joining pressure sensor of variable frequency control cabinet (1) (8).

2. non-negative pressure frequency-changing water supply device according to claim 1, it is characterized in that, the water inlet of described water pump (4) is provided with first valve (9), and the delivery port place of water pump (4) is provided with flap valve (10), and the port of export of described flap valve (10) is connected with second valve (11).

3. non-negative pressure frequency-changing water supply device according to claim 1 and 2 is characterized in that, described pot with no negative pressure (5) is made for stainless steel material.

4. non-negative pressure frequency-changing water supply device according to claim 1 and 2 is characterized in that, described water pump (4) is centrifugal multistage pump multiple centrifugal pump.

5. non-negative pressure frequency-changing water supply device according to claim 1 and 2 is characterized in that, the quantity of described water pump (4) is 2 to 6.