CN2520956Y - Continuous casting billet milling cooling water buffer supply apparatus - Google Patents

Abstract

The utility model discloses a sheet continuous casing blank cooling water buffer supplier, wherein when a rolling mill 8 works normally, and a water pump 12 provides cooling water to the rolling mill 8, and when the rolling mill 8 waits for blank, a water inlet valve 7 is closed, the cooling water out from the water pump 12 will via the water entrance valves 6 and 11 enter into a cooling water buffer pot 5, when the water level and pressure in the pot 5 reach constant valve, the water level and pressure signals are transmitted to a console 1, for some blank wait time, the console 1 starts a control valve 16, the water inlet valve 7 and an air compressor 14, to press the air in an air bag 15 into the cooling water buffer pot 5, to feed cooling water via the tubes of the water entrance valves 6, 11, and the tube mounted with the water inlet valve 7 into the rolling mill 8, to confirm the supply of cooling water for the rolling mill. Via the utility model, without closing water pump 12 and air compressor, cooling water can discontinuously enter and leave the cooling water buffer pot 5, to save energy and resource, and reach circulation of cooling water.

Description

The rolling cooling water buffering of continuous casting billet feedway

Technical field the utility model relates to a kind of cooling water buffering feedway that is applied in the metal working process, refers in particular to apparatus for supplying cool water in the book plate continuous casting base rolling mill practice, belongs to the B21B27/00 class.

Background technology is used for its mill speed of continuous casting and rolling equipment of China at present generally at 1200 meters/minute; rolling power is bigger 3～4 times than continuous casting ability; the continuous casting feed speed does not catch up with mill speed; have only about 1/3rd of the conticaster effective time so be used for the real effective time of rolling book plate mill, in time certain period of supply is not in stopped status to the book plate mill at continuous casting billet.If when milling train is out of service, continue to supply with milling train, will inevitably cause the waste of great lot of water resources with the cooling water inflow under the as-rolled condition; One of way of head it off is to close supply-water pump when milling train is shut down; open supply-water pump again so that in time supply with cooling water when treating the milling train operation to milling train; the shortcoming of this way is when the milling train operation needs water; the supply-water pump reaction time can not in time start supply-water pump slowly and influence to the milling train cooling water supply; next is that the frequent startup of supply-water pump or close must cause the supply-water pump wearing and tearing, reduces supply-water pump service life ...It is investigated reality; at present domestic is to make the book plate mill no matter be in operation or stopped status is not often opened again or closed under the situation of supply-water pump to the book plate continuous casting equipment for continuously rolling from external introduction; the parallel pipeline of a band of bypass water discharging valve on milling train and milling train induction valve door pipeline; when shutting down, milling train closes the induction valve door of milling train like this; allow cooling water continue circulation along bypass duct; though can save 10～15% the energy like this; but because supply-water pump is in continual operation; for a smelter of producing 200～2,500,000 tons of book plates per year, about 1200～1,500 ten thousand yuan of the annual electricity expense that increases.

Summary of the invention task to be solved in the utility model is to exist water resource to waste and adopt the problem of high-power supply-water pump in a large number at the cooling water supply arrangement from the book plate continuous casting milling train of external introduction; on the basis of the supply equipment of former book plate mill, set up the rolling cooling water buffering of cover feedway; no matter milling train is to be in operation or stopped status; do not need frequently to open or close supply-water pump; so not only can prolong supply-water pump service life, also can reduce power consumption.

For solving the technical scheme that above-mentioned task adopts be: the inlet and outlet pipe that on the cooling water pipe of former book plate mill supply, connects two-way band valve, this inlet and outlet pipe directly is connected with an end of cooling water surge tank, the blast pipe of one side mounting strap valve of the other end of cooling water surge tank, this exhaust duct is connected with another low pressure gas bag; And the opposite side of cooling water surge tank is equipped with the gas ducting of control valve, and this pipeline is connected with the gas bag of filling with inert gas (as nitrogen) or air, links to each other with air compressor machine with pipeline at an end of the gas bag of filling with inert gas or air.The signal transmission line of cooling water water level and cooling water hydraulic pressure is installed on the top of cooling water surge tank, and these signal transmission lines connect console, and console has the signal control line to be connected with control valve simultaneously.

Adopt the as above rolling cooling water buffering of the continuous casting billet feedway of technical scheme formation, owing to there is one can make chilled water storage and the cooling water surge tank of emitting and console that matches with cooling water surge tank middle water level, hydraulic pressure value and the gas bag that inert gas is provided with the strand situation according to the operation of milling train, console can reach the constant voltage value according to hydraulic pressure in the idle time control cooling water surge tank of milling train, the power of employed like this supply-water pump is 2/3 of former supply-water pump power, energy savings 50～60%.Simultaneously because the pressure of the cooling water that provides to milling train from the cooling water surge tank reaches steady state value, ton water power consumption can reduce by 15,000,000 yuan of power costs in 1 year at 1.0～1.5kwh.

Description of drawings Fig. 1 is the rolling cooling water buffering of a continuous casting billet described in the utility model feedway schematic diagram, also is the utility model specification digest accompanying drawing.

The specific embodiment is described in further detail the specific embodiment of the present utility model below in conjunction with accompanying drawing.

As shown in Figure 1,1 is console, and 2 is hydraulic pressure signal transmission line in the cooling water surge tank 5,3 is cooling water surge tank 5 middle water level signal transmission lines, and 4 is drain tap, and 5 is the cooling water surge tank, 6,11 is the Inlet and outlet water valve, and 7 is the milling train inlet valve, and 8 is milling train, 9 are the bypass water discharging valve, and 10 is water supply valve, and 12 is supply-water pump, 13 is circulating water pool, and 14 is air compressor machine, and 15 is the inert gas gas bag, 16 is control valve, and 17 for being connected in the control line between console 1 and the control valve 16.End with the coolant intake pipe of milling train 8 of inlet valve 7 is connected, the other end is connected with an end of water supply valve 10 and bypass water discharging valve 9 respectively, the other end of bypass water discharging valve 9 is communicated with the cooling water outlet pipe of milling train 8, house steward after the connection constitutes the return pipe of circulating water pool 13, one of the outlet pipe of circulating water pool 13 and supply-water pump 12 is connected, and water supply valve 10 is connected in the other end of supply-water pump 12.Be connected and installed with the inlet and outlet pipe lines of Inlet and outlet water valve 6,11 at two of water supply valve 10, this two inlet and outlet pipe lines is connected with an end of cooling water surge tank 5, the other end of cooling water surge tank 5 is equipped with the discharge duct of band drain tap 4 by a side at top, and this discharge duct is connected with another low pressure gas bag, the opposite side at cooling water surge tank 5 tops and the symmetrical place of discharge duct are equipped with the gas ducting of band control valve 16, this gas ducting is connected with inert gas gas bag 15, with pipeline inert gas gas bag 15 and air compressor machine 14 is joined.The water level in the cooling water surge tank 5 and the signal transmission line 3 and 2 of hydraulic pressure are installed at the top of cooling water surge tank 5, and water level signal transmission line 3, hydraulic pressure signal transmission line 2 are communicated with console 1 simultaneously, and control line 17 is connected between console 1 and the control valve 16.

When the regular supply of book plate continuous casting base, milling train 8 is in normal operating condition, opens supply-water pump 12, opens water supply valve 10 and inlet valve 7 to milling train 8 cooling water supplies, cooling water flow flows into circulating water pool 13 by return pipe behind milling train 8, guaranteed the supply of cooling water and so forth; When being lower than mill speed, the supply rate of continuous casting billet (is usually less than 1/2); milling train 8 is in stopped status; supply water to milling train 8 with powerful supply-water pump 12 if continue; can cause the waste of water resource and electric power; temporary close inlet valve 7 reaches and closes bypass water discharging valve 9 for a long time for this reason; open Inlet and outlet water valve 6,11; closed control valve 16; the cooling water that is provided by supply-water pump 12 enters cooling water surge tank 5 through the pipeline that Inlet and outlet water valve 6,11 is housed, and the air in the cooling water surge tank 5 is discharged to the low pressure gas bag by the pipeline that drain tap 4 is installed.When the water level in the cooling water surge tank 5 and hydraulic pressure reach certain position or certain value, by water level signal transmission line 3 and hydraulic pressure signal transmission line 2 water level and hydraulic pressure information are passed to console 1, the hydraulic pressure of controlling cooling water surge tank 5 by console 1 reaches steady state value.When continuous casting billet is in the 8 normal operations of normal supply state, milling train when rolling, console 1 is passed to control valve 16 with signal, open air compressor machine 14, open inlet valve 7, close drain tap 4, opening controlling valve 16, the inert gas that is provided by gas bag 15 enters in the cooling water surge tank 5 through the pipeline that control valve 16 is installed, make the cooling water in the cooling water surge tank 5 deliver to milling train 8, guarantee that the cooling water of milling train 8 is supplied with through the pipeline that Inlet and outlet water valve 6,11 and water supply valve 10, water supply valve 7 are housed; Milling train 8 through one period running time after; continuous casting billet is in undesired supply condition again; milling train 8 is in again treats that base shuts down the state that rolls; repeat above-mentioned working procedure; the cooling water that supply-water pump 12 provides enters again in the cooling water surge tank 5 ..., in the whole service process, supply-water pump 12, air compressor machine 14 all are in running status; both having guaranteed does not need to use powerful supply-water pump 12 again to milling train 8 normal supply cooling waters.

As above embodiment also is the most preferred embodiment of this case.

Claims (1)

1, the rolling cooling water buffering of a kind of continuous casting billet feedway, it is by supply-water pump (12), water supply valve (10), inlet valve (7), circulating water pool (13), Inlet and outlet water valve (6), (11), cooling water surge tank (5), drain tap (4), dig system valve (16), inert gas gas bag (15), air compressor machine (14), water level signal transmission line (3), hydraulic pressure signal transmission line (2), console (1), control line (17) is formed, end with the coolant intake pipe of milling train (8) of inlet valve (7) is connected, the other end links to each other with an end of water supply valve (10) and bypass water discharging valve (9) respectively, after being connected with the cooling water outlet pipe of milling train (8), connects the other end of bypass water discharging valve (9) return pipe of circulating water pool (13), one of the outlet pipe of circulating water pool (13) and supply-water pump (12) links to each other, water supply valve (10) is connected in the other end of supply-water pump (12), the two that it is characterized in that water supply valve (10) is connected and installed with Inlet and outlet water valve (6), (11) water inlet pipe and water outlet pipe is logical, inlet and outlet pipe lines is connected with an end of cooling water surge tank (5), the other end of cooling water surge tank (5) is equipped with the discharge duct of band drain tap (4) by top one side, the opposite side at cooling water surge tank (5) top is equipped with the gas ducting of band control valve (16), gas ducting is connected with inert gas gas bag (15), inert gas gas bag (15) is connected with air compressor machine (14), at the top of cooling water surge tank (5) water level signal transmission line (3) is installed, hydraulic pressure signal transmission line (2), water level signal transmission line (3), hydraulic pressure signal transmission line (2) is communicated with console (1) simultaneously, and control line (17) is connected between console (1) and the control valve (16).