CN2748445Y - Intelligent automatic frequency-conversion water-supply device for water treatment system - Google Patents

Abstract

The utility model discloses an intelligent automatic frequency-conversion water-supply device for a water treatment system. A pressure transmitter I is installed between a primary reverse osmosis filtering device and a secondary reverse osmosis pump. A pressure transmitter II is installed on the tail end of a water-supply pipeline. A one-way valve, a double-port pressure bag and a rotor flow meter are orderly installed on the water outlet pipeline of the secondary reverse osmosis filtering device. The output signals of the rotor flow meter and the pressure transmitters I and II are delivered to a control kernel PLC which delivers the output signals to the univertors of the primary and the secondary reverse osmosis pumps respectively after the computation of the PI. According to the requirement of actual reverse osmosis water, the frequency of the electrical machines of the primary and secondary reverse osmosis pumps in the system can be controlled by the utility model to generate corresponding changes, which enables the water yield of system to match with the demand. The dialysis water can be used as long as produced, and the supply and the demand of the water are balanced. The utility model has no dead water and no stored water, indeed realizing the dialysis of running water, and meanwhile, ensuring the freshness of the dialysis water. The utility model has the advantages of water saving, electric power saving, constant pressure, safety, stable system pressure, no impacts and low system failure rates, extending the service lives of the key point components in the system.

Description

Intelligence water treatment system automatic frequency-conversion water supply installation

[technical field]: the utility model relates to a kind of utility appliance of hemodialysis apparatus, particularly the feedway of reverse osmosis water during hemodialysis.

[background technology]: the coventional type water treating equipment of present domestic use belong to the product of the nineties, basically be the product of foreign imitation, this class water-treated prod is on structure, the output of reverse osmosis water can only be produced water by the maximum water production rate of system design, rather than produces according to user's actual used water amount; And hospital tends to consider the development prospect of self when buying this series products, and the maximum water production rate of choosing water treatment system is greater than the actual demand amount; Simultaneously the real work situation of hospital's hemodialysis unit can not guarantee that water treatment system all operates at full capacity every day, so cause the actual water production rate of water treatment system in the unit time that hospital buys much larger than the actual demand amount of hospital's hemodialysis unit to reverse osmosis water, promptly in large supply in demand.This all is a kind of great waste to water resources and power resource undoubtedly.How solving the water treatment system reverse osmosis waters of producing more and hemodialysis unit is realized continuous water supply, is two problems that this series products faces.At present, 1), a cover water storage and a water supply installation be set in the back of reverse-osmosis filtering device domestic and external water-treated prod solves by following two kinds of methods:, be used for water treatment system reverse osmosis waters of producing in the storage unit time and realize the function of water treatment system discontinuous operation and continuous water supply more; 2), before anti-permeability pump water inlet and between the hemodialysis unit water-supply line end circulation water tank is installed, make that the water treatment system reverse osmosis waters of producing enter water treatment system once more by the circulation water tank in the unit time more, participate in circulation product water; The 1st) kind method is saved the water source to a certain extent, but its reverse osmosis water forms immobilising stagnant water in the process of storage, for growing of bacterium provides time and place, also provide possibility for the people for the secondary pollution that causes; The 2nd) kind method, solve reverse osmosis water well and do not stored problem with the hemodialysis unit continuous water supply, the flowability and the freshness of reverse osmosis water have also been guaranteed, but it is produced by the maximum water production rate of system and makes the reverse osmosis water of fecund participate in circulation once more, very big to the waste of water resources and power resource, increased the work load of water treatment system simultaneously.

[summary of the invention]: the utility model purpose is to solve the deficiencies in the prior art, and a kind of intelligent water treatment system automatic frequency-conversion water supply installation is provided, and with the i.e. usefulness of the i.e. product of realizing reverse osmosis water, science is supplied with, and supplies as required and conserve water resource and power resource.

The utility model water supply installation is mainly realized by following scheme: the softening water that forms after the prime pre-treatment enters the circulation water tank through pipeline, circulation water tank outlet pipeline connects the first-stage reverse osmosis pump that has frequency transformer, with the first-stage reverse osmosis filtration unit, first-stage reverse osmosis filtration unit water outlet pumps into pipeline between the mouth of a river to two-pass reverse osmosis on, pressure unit I is installed, through having the two-pass reverse osmosis pump of frequency transformer, behind the two-pass reverse osmosis filtration unit, on two-pass reverse osmosis filtration unit outlet pipeline, order is installed check valve, behind twoport press packet and the spinner-type flowmeter, be connected with the hemodialysis unit water-supply line, behind the terminal setting pressure transmitter of hemodialysis unit water-supply line II, return the circulation water tank with safety overflow valve 15 mounted thereto by the road.

The output signal of spinner-type flowmeter, pressure unit I and pressure unit II is connected control core PLC by data line, and after the PLC process PI computing, its output control signal is delivered to one-level, two-pass reverse osmosis pump frequency conversion device respectively.

Advantage of the present utility model and positively effect: 1, automatic frequency-conversion supplies water, this device can be according to the demand of actual reverse osmosis water, automatic control system I and II anti-permeability pump electric machine frequency generation respective change, the water production rate and the demand of system are complementary, the realization water for dialysis promptly produces promptly and uses, the equilibrium of supply and demand, no stagnant water, no water, real running water dialysis, the while has also guaranteed the freshness of water for dialysis.2, water saving, variable frequency water supply, the equilibrium of supply and demand does not need to produce too much reverse osmosis water, reaches water saving; 3, economize on electricity, variable frequency water supply, I and II anti-permeability pump electric machine frequency generation respective change, non-full range (50 hertz) work, average real work loss of voltage reaches economize on electricity; 4, constant voltage, variable frequency water supply, the equilibrium of supply and demand makes the pressure change in the water-supply line be tending towards constant; 5, safety, variable frequency water supply, system pressure is steady, does not have and impacts, and prolongs the work-ing life of system core components and parts, and system failure rate is low.

[description of drawings]:

Fig. 1 is this intelligent water treatment system automatic frequency-conversion water supply installation structural representation;

Fig. 2 is an intelligent water treatment system automatic frequency-conversion water supply installation control process synoptic diagram.

[embodiment]:

Embodiment 1:

As shown in Figure 1, the utility model mainly comprises circulation water tank 1, first-stage reverse osmosis pump 2, first-stage reverse osmosis filtration unit 3, first-stage reverse osmosis filtration unit water outlet pumps into pipeline between the mouth of a river to two-pass reverse osmosis on, pressure unit (I) 4 is installed, the two-pass reverse osmosis pump 5 that has frequency transformer, two-pass reverse osmosis filtration unit 6, two-pass reverse osmosis filtration unit water outlet is to the pipeline 7 between hemodialysis unit water-supply line 11 inlets, and order is installed in the check valve 8 on 7, twoport press packet 9 and spinner-type flowmeter 10, and the hemo system 12 that is connected with hemodialysis unit water-supply line 11, at the terminal setting pressure transmitter of hemodialysis unit water-supply line (II) 13, hemodialysis unit water-supply line end outlet to circulate between water tank pipeline 14 and be installed in safety overflow valve 15 on 14.

System boot work, after the pre-treatment of tap water process prime, form softening water and enter circulation water tank 1, when the worktable number of hemo system in the hemodialysis unit when zero platform begins to increase, then hemodialysis unit is to the increase of starting from scratch of the demand of reverse osmosis water, the reverse osmosis water of storage flows out in the twoport press packet 9, trigger spinner-type flowmeter 10 output signals to control core PLC, water treatment system is started automatically, softening water enters first-stage reverse osmosis pump 2 by circulation water tank 1 and first-stage reverse osmosis filtration unit 3 is produced primary reverse osmosis water, primary reverse osmosis water passes through two-pass reverse osmosis pump 5 and two-pass reverse osmosis filtration unit 6 again, produce two-pass reverse osmosis water through check valve 8, twoport press packet 9 and spinner-type flowmeter 10 enter hemodialysis unit water-supply line 11 and use for hemo system 12, when the pressure in the hemodialysis unit water-supply line 11 reaches constant set(ting)value, show that promptly water production rate and the hemodialysis unit actual used water amount of water treatment system in the unit time reached balance.

System's automatic frequency-conversion supplies water, when the worktable number of hemo system in the hemodialysis unit increases, then hemodialysis unit increases the demand of reverse osmosis water, pressure in the hemodialysis unit water-supply line 11 will reduce, the signal that pressure unit (II) reduces pressure sends back control core PLC, PLC is through the PI computing, output a control signal to two-pass reverse osmosis pump frequency conversion device, raise by Frequency Converter Control two-pass reverse osmosis pump motor operating frequency, the two-pass reverse osmosis discharge of pump is strengthened, then the two-pass reverse osmosis aquatic products amount of producing through two-pass reverse osmosis filtration unit 6 in the unit time increases, thereby realize then this automatic frequency-conversion water supply process of the also corresponding increase of the actual water production rate of two-pass reverse osmosis device of hemodialysis unit actual demand amount increase, when reaching the equilibrium of supply and demand, the pressure in the hemodialysis unit water-supply line 11 will reach constant set(ting)value; In like manner, because of the increase of two-pass reverse osmosis discharge of pump must strengthen demand to primary reverse osmosis water, then first-stage reverse osmosis water filtering device water outlet will reduce to the pressure that two-pass reverse osmosis pumps in the pipeline of the mouth of a river, the signal that pressure unit (I) reduces pressure sends back control core PLC, PLC is through the PI computing, output a control signal to first-stage reverse osmosis pump frequency conversion device, raise by Frequency Converter Control first-stage reverse osmosis pump motor operating frequency, the first-stage reverse osmosis discharge of pump is strengthened, then the primary reverse osmosis water output of producing through first-stage reverse osmosis filtration unit 3 in the unit time increases, thereby realizes then this automatic frequency-conversion water supply process of the also corresponding increase of the actual water production rate of first-stage reverse osmosis device of two-pass reverse osmosis device actual demand amount increase; Above-mentioned two processes, be by pressure unit (I), (II) I and II anti-permeability pump machine operation frequency to be raise automatically respectively, The whole control and anti-permeability pump frequency change are automatically and successive, water treatment system automatic frequency-conversion this function that supplies water when so just having realized in the hemodialysis unit worktable number increase of hemo system; In like manner, when the worktable number of hemo system in the hemodialysis unit reduces, then hemodialysis unit reduces the demand of reverse osmosis water, system reduces I and II anti-permeability pump machine operation frequency automatically by pressure unit (I), (II) respectively, thereby the water treatment system water production rate is reduced, realize the equilibrium of supply and demand automatically.

System-down when hemo system worktable number is reduced to zero platform, does not promptly need water, and then the spinner-type flowmeter output signal is to control core PLC, and water treatment system quits work automatically.At this moment, hemodialysis unit water-supply line and first-stage reverse osmosis filtration unit water outlet are the constant set value to the pressure that two-pass reverse osmosis pumps in the pipeline of the mouth of a river, have stored the reverse osmosis water of a constant volume in the twoport press packet 9.

Its physical circuit control process is referring to Fig. 2.Its control principle is the variation with the online detection water-supply line of pressure unit internal pressure, and pressure signal fed back to control core PLC, output simulating signal (AI) is as the input signal of frequency transformer after the PLC sequential operation is handled, frequency transformer is done the speed control by frequency variation operation with drivingmotor by the signal of input, thereby realizes the purpose of variable frequency water supply.5-1 is a frequency transformer among the figure, and 5-2 is the two-pass reverse osmosis pump.

Claims (2)

1, a kind of intelligent water treatment system automatic frequency-conversion water supply installation, mainly comprise the circulation water tank, anti-permeability pump, reverse-osmosis filtering device, the twoport press packet, spinner-type flowmeter, water-supply line and control core PLC, it is characterized in that the softening water that forms after the prime pre-treatment enters the circulation water tank through pipeline, circulation water tank outlet pipeline connects the first-stage reverse osmosis pump that has frequency transformer, with the first-stage reverse osmosis filtration unit, first-stage reverse osmosis filtration unit water outlet pumps into pipeline between the mouth of a river to two-pass reverse osmosis on, pressure unit I is installed, through having the two-pass reverse osmosis pump of frequency transformer, behind the two-pass reverse osmosis filtration unit, on two-pass reverse osmosis filtration unit outlet pipeline, order is installed check valve, behind twoport press packet and the spinner-type flowmeter, be connected with the hemodialysis unit water-supply line, behind the terminal setting pressure transmitter of hemodialysis unit water-supply line II, return the circulation water tank with safety overflow valve 15 mounted thereto by the road.

2, intelligent water treatment system automatic frequency-conversion water supply installation according to claim 1, the output signal that it is characterized in that spinner-type flowmeter, pressure unit I and pressure unit II is connected control core PLC by data line, after the PLC process PI computing, its output control signal is delivered to one-level, two-pass reverse osmosis pump frequency conversion device respectively.