CN205388436U - Frequency conversion unsteady flow volume unit - Google Patents

Abstract

The utility model relates to a frequency conversion unsteady flow volume unit belongs to the manufacturing and equipment technical field of plate type regenerator group. This unit includes that an one -level pipe -network water supply antilinear Y type filter, H1 branch connection plate heat exchanger pass through HR1 branch connection to one -level pipe network return water mouth again, the 2nd Y type filter of secondary pipe network return water antilinear, HR2 branch pipe, circulating pump are connected plate heat exchanger and are passed through H2 branch connection to secondary pipe network feed water inlet again. The unit has circulation system and water charging system in the secondary pipe network, has secondary water supply temperature control function and constant voltage control function, has satisfied user's operation requirement. This unit is installed the converter on the water pump, has shortened the manufacturing time, has improved production efficiency, has reduced and has made and cost of maintenance.

Description

Frequency Conversion Variable Water Flow unit

Technical field

This utility model relates to Frequency Conversion Variable Water Flow unit, belongs to manufacture and the package technique field of plate type regenerator group.

Background technology

At present, plate-type heat-exchange unit is mainly used in concentrated supply of heating in the city field, plate-type heat-exchange unit is made up of the auxiliary device etc. of heat-exchangers of the plate type, water pump, instrument, electrical equipment, control system and necessity, it is achieved between fluid, heat is exchanged for the heat-exchanger rig of purpose.Simultaneously along with its appearance makes heat exchange base station more energy-conservation, more intelligent.Along with national energy-saving reduces discharging deepening continuously of thought, central heating is universal in China's major part heating area, also begins to carry out central heating even at some high-grade communities, south.Central heating allows for many arcola rooms and has made heat exchange station therewith into, and simultaneously newly-built community and mansion are also at the modern heat exchange station of ground or underground investment construction.Heat exchange station adopts again plate-type heat-exchange unit as the basic equipment in station as the basal cell of central heating, and the regular maintenance of this basic equipment is the cost that heating enterprise has to take into account that.

Along with social development, plate type regenerator group demand is strengthened by the industry such as central heating, central air-conditioning, electric power year by year.Need the plate type regenerator group time to compare concentration every year due to every profession and trade, thus also relatively larger to the production pressure of heat exchanger enterprise, affect the workmanship of heat-exchange unit.The design of plate type regenerator group produces and complex relate to many work posts and has coordinated and be required for many time complete to design, production and inspection, and be mainly for delivery date every year and all concentrate on season in autumn in summer two, owing to Lead Time is concentrated, producer needs to concentrate various strength to complete annual major part order, not only cause design, manufacture and test level declines, and strong influence product quality and supply of material rate on schedule.In view of Lead Time and energy-conservation problem, it is conveniently necessary for manufacturing simplified overhauling.Exploitation Frequency Conversion Variable Water Flow unit is still very necessary in sum.

Summary of the invention

For solving problems of the prior art, this utility model provides Frequency Conversion Variable Water Flow unit, manufactures complexity and expends that man-hour is many, power consumption is big, the problem of maintenance difficult solving unit design, to simplify unit design step and to improve unit and manufacture efficiency.

The technical solution adopted in the utility model is: Frequency Conversion Variable Water Flow unit, and first-level pipeline network feed water inlet the first y-type filter, H1 arm connecting plate type heat exchanger are connected to first-level pipeline network water return outlet then through HR1 arm；Secondary network water return outlet is connected to secondary network feed water inlet through the second y-type filter, HR2 arm, circulating pump connecting plate type heat exchanger then through H2 arm；Described unit also includes water tank, and water tank sequentially passes through feed water inlet, small pump is connected to HR2 arm, and described HR2 arm also sets up the relief valve with relief valve port；Described unit also includes electrical control cubicles, and described electrical control cubicles is electrically connected between converter and circulating pump, small pump.

The beneficial effects of the utility model are: this unit includes first-level pipeline network feed water inlet the first y-type filter, H1 arm connecting plate type heat exchanger is connected to first-level pipeline network water return outlet then through HR1 arm；Secondary network water return outlet is connected to secondary network feed water inlet through the second y-type filter, HR2 arm, circulating pump connecting plate type heat exchanger then through H2 arm.Unit has blood circulation and water charging system in secondary pipe network, has secondary water-supply temp. control function and Isobarically Control function, meets user's instructions for use.Converter is installed on water pump by this unit, shortens manufacturing time, improves production efficiency, reduces manufacture and maintenance cost.

In secondary pipe network, circulating pump, small pump all adopt VFC.Unit is after putting into operation, and because many reasons not necessarily can run under rated load, after particularly realizing household-based heat metering, load variations fluctuation is very big, and the resistance of secondary pipe webmaster also changes, and heat exchanger supply head also changes therewith.Control circulating pump converting operation by the backwater pressure reduction that supplies of secondary network, reach to save the purpose of electric energy, heat energy.Secondary records pressure signal for the pressure transducer on water return pipeline, via controller calculates actual pressure differential value and the contrast of controller pressure differential resetting value, after PID arithmetic, regulating cycloconvertor frequency, change circulating pump rotating speed, running thus realizing secondary circulation system constant-pressure drop.When a frequency variable circulating pump full-speed operation does not still reach setting pressure reduction, controller starts power frequency circulating pump automatically, and variable frequency pump reduction of speed regulates simultaneously, it is prevented that the unexpected supercharging of system pipe network, the safety of protection pipe network.Secondary heat supply network moisturizing is frequency-changing pressure stabilizing moisturizing, records signal according to the pressure transducer being contained in secondary returning water lines and compares with setting value in controller, then exports to converter through PID arithmetic, reaches the purpose of stabilisation systems pressure regulating small pump motor speed.

Accompanying drawing explanation

Fig. 1 is the front view of Frequency Conversion Variable Water Flow unit.

Fig. 2 is the top view of Frequency Conversion Variable Water Flow unit.

Fig. 3 is the N direction view in Fig. 1.

Fig. 4 is the process chart of Frequency Conversion Variable Water Flow unit.

In figure: 1, plate type heat exchanger, 2, base, the 3, first y-type filter, 4, circulating pump, 5, small pump, 6, electrical control cubicles, 7, relief valve, 7a, relief valve port, the 8, second y-type filter, 9, H1 arm, 10, H2 arm, 11, HR1 arm, 12, HR2 arm, 13, water tank, 13a, feed water inlet, H1, first-level pipeline network feed water inlet, HR1, first-level pipeline network water return outlet, H2, secondary network feed water inlet, HR2, secondary network water return outlet.

Detailed description of the invention

Fig. 1,2,3 and 4 illustrate Frequency Conversion Variable Water Flow unit, and it includes twice pipe network blood circulation: first-level pipeline network feed water inlet H1 is connected to first-level pipeline network water return outlet HR1 through the first y-type filter 3, H1 arm 9 connecting plate type heat exchanger 1 then through HR1 arm 11；Secondary network water return outlet HR2 is connected to secondary network feed water inlet H2 through the second y-type filter 8, HR2 arm 12, circulating pump 4 connecting plate type heat exchanger 1 then through H2 arm 12.Unit also includes water charging system: sequentially passed through feed water inlet 13a by water tank 13, small pump 5 is connected on HR2 arm 12, HR2 arm 12 and also sets up the relief valve 7 with relief valve port 7a.Unit also includes electrical control cubicles 6, and it is electrically connected between converter and circulating pump 4, small pump 5.

When adopting technique scheme work, water is entered heat-exchangers of the plate type 1 by first-level pipeline network feed water inlet H1 discharged by first-level pipeline network water return outlet HR1 then through HR1 arm 11 through the first y-type filter 3, H1 arm 9；Water is entered heat-exchangers of the plate type 1 by secondary network water return outlet HR2 discharged by secondary network feed water inlet H2 then through H2 arm 12 through the second y-type filter 8, HR2 arm 12, circulating pump 4.Sequentially passed through feed water inlet 13a by water tank 13, small pump 5 is connected to HR2 arm 12 and carries out moisturizing for pipe network blood circulation.The flow of the electrical control cubicles 6 FREQUENCY CONTROL circulating pump 4 and small pump 5 by controlling converter.

Secondary records pressure signal for the pressure transducer on water return pipeline, via controller calculates actual pressure differential value and the contrast of controller pressure differential resetting value, after PID arithmetic, regulating cycloconvertor frequency, change circulating pump rotating speed, running thus realizing secondary circulation system constant-pressure drop.When a frequency variable circulating pump full-speed operation does not still reach setting pressure reduction, controller starts power frequency circulating pump automatically, and variable frequency pump reduction of speed regulates simultaneously, it is prevented that the unexpected supercharging of system pipe network, the safety of protection pipe network.Secondary heat supply network moisturizing is frequency-changing pressure stabilizing moisturizing, records signal according to the pressure transducer being contained in secondary returning water lines and compares with setting value in controller, then exports to converter through PID arithmetic, reaches the purpose of stabilisation systems pressure regulating small pump motor speed.

Claims (1)

1. Frequency Conversion Variable Water Flow unit, it is characterised in that: first-level pipeline network feed water inlet (H1) is connected to first-level pipeline network water return outlet (HR1) through the first y-type filter (3), H1 arm (9) connecting plate type heat exchanger (1) then through HR1 arm (11)；Secondary network water return outlet (HR2) is connected to secondary network feed water inlet (H2) through the second y-type filter (8), HR2 arm (12), circulating pump (4) connecting plate type heat exchanger (1) then through H2 arm (12)；Described unit also includes water tank (13), and water tank (13) sequentially passes through feed water inlet (13a), small pump (5) is connected to HR2 arm (12), and described HR2 arm (12) also sets up the relief valve (7) with relief valve port (7a)；Described unit also includes electrical control cubicles (6), and described electrical control cubicles (6) is electrically connected between (5) through converter and circulating pump (4), small pump.