CN2928201Y

CN2928201Y - Secondary filter for cold mill

Info

Publication number: CN2928201Y
Application number: CN 200620105883
Authority: CN
Inventors: 吕孟静; 王晓东; 钱华; 高雷
Original assignee: Ningbo Baoxin Stainless Steel Co Ltd
Current assignee: Ningbo Baoxin Stainless Steel Co Ltd
Priority date: 2006-07-21
Filing date: 2006-07-21
Publication date: 2007-08-01
Anticipated expiration: 2016-07-21

Abstract

A secondary filter device for cold calendar comprises an air compression device, a secondary filter device, a clarifying tank, a dirty oil tank and conduits used to connect the devices and a cutoff valve positioned in the conduit. The utility model is characterized in that the secondary filter device comprises a first filtration tank and a second filtration tank connected by conduit. The cutoff valve is also arranged in the conduit used for cascade connection, passing conduits of the first filtration tank and the second filtration tank are respectively connected with air compression devices, the dirty oil tank and the clarifying tank, conduit outlets arranged at the bottom of the first filtration tank and the second filtration tank are both leading to the clarifying tank, filtering rolling oil outlets of the first filtration tank and the second filtration tank are both heading to the dirty oil tank. Compared with the prior art, the utility model has the advantages that the filtering accuracy of the rolling oil is highly improved, service life of the filter element in the major filtration system is prolonged, manufacturing cost is reduced, the unused time is reduced, thereby the efficiency of work is increased.

Description

A kind of cold-rolling mill secondary filter

Technical field

The utility model relates to a kind of machining parts of metal, relates in particular to a kind of cold-rolling mill secondary filter.

Background technology

The status of ROLLING OIL in stainless steel cold rolling mill is extremely important, and it is mainly used to bearing, roller, wiper bearing and salband steel in lubricated and the cooling frame.In order to guarantee the quality of ROLLING OIL, in stainless-steel cold-rolling, adopted the ROLLING OIL filtration system, it is important system in the stainless-steel cold-rolling equipment, mainly is made up of main filtration system and secondary filter system, and the quality of ROLLING OIL filtering accuracy directly influences product quality.Its course of work: the dirty ROLLING OIL after the injection flows into dirty fuel tank, is driven in the filtering tank by oil well pump, enters the filtration in-core through pressure reduction again, becomes clean ROLLING OIL, flows into clean fuel tank and recycles.Crossing filter core is the hollow cylinder that is entwined by glass fibre, and filter capacity is very strong, can filter out impurity and foreign matter in the ROLLING OIL.In filter process, filter the core glass fiber and blocked by foul easily, filter capacity is descended.Service life, filter capacity and quality in order to guarantee filter have adopted the automatic backwash mode to filter core, promptly outwards blow from filtering in-core portion with compressed air, and its surperficial foul is removed, and recover filter capacity.And the dirty oil that main filtering tank backwash is got off filters by secondary filter system again, gets back to dirty fuel tank at last, thereby forms the ROLLING OIL recycling.With reference to figure 1, the ROLLING OIL filtration system: main filtering tank 1a backwash will stick to dirty the sweeping away on the filter core 11a, fall the bottom of jar, the back is discharged to fractional precipitation fuel tank 3a with dredge pump 4a with dirty oil, ROLLING OIL in the fractional precipitation fuel tank 3a is delivered to secondary filter jar 2a by pump 7a, filter valve 8a and the pipeline flow-direction dirty fuel tank 5a of the ROLLING OIL after the filtration by opening by the filter core 22a in the secondary filter jar 2a.For filter element not by dirty obstruction, system has the automatic backwash function, the medium of backwash is a compressed air, 6a is a compressed air cylinder, after secondary filter system filtered 45 minutes, this system carried out backwash automatically, at first opens valve 9a, ROLLING OIL in the secondary filter jar 2a is racked up, valve 10a opens then, and compressed air blew 6 seconds, stops 34 seconds, carry out continuously 6 times, after this secondary filter system filters again.

When the filtering tank backwash, all can discharge a large amount of sump oils to the fractional precipitation fuel tank, a secondary filter jar be arranged, its objective is and sump oil will be refiltered once, return use, to reduce ROLLING OIL consumption at the top of fractional precipitation fuel tank.But the filter type of this filter is just in time opposite with main filter, and sump oil is squeezed into the secondary filter jar with pump, and clean oil extrudes from the aflter-fillter filter core is inner, and this mode also claims positive-pressure type to filter (being in barotropic state in jar).Because the structure of this filtering tank is the same with main filter, the density of filter element is very high, adopts positive-pressure type to filter, and cartridge surface has dirty being attached on the cartridge surface very soon, and part enters filter core inside.But secondary filter system will carry out backwash, because cartridge surface has considerable dirtyly, causes compressed-air actuated pressure in time not discharge, and compressed air blows brokenly filter core sometimes, can cause filter core to come off when serious.The dirty oil that filter core blows brokenly in the after-filter directly enters into dirty fuel tank by the filter core of breakage, if do not find this problem for a long time, whole ROLLING OIL system will be polluted.Influence the filtering accuracy and the filter element life of whole system, serious meeting influences the production capacity of milling train and scrapping of filter core, and production and equipment are all brought immeasurable loss.

If coming off appears in the secondary filter system filter core, when daily spot check, be not easy to find.The mode of generally taking now to regularly replace filter core guarantees the normal operation of system, and maintenance cost is very high.And when changing the secondary filter system filter core, must shut down 45 minutes, influence the production capacity of milling train to a certain extent.

The utility model content

Technical problem to be solved in the utility model is the cold-rolling mill secondary filter that a kind of filter core life cycle length, ROLLING OIL filtering accuracy height, raising security are provided at the above-mentioned state of the art.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: this a kind of cold-rolling mill secondary filter, comprise air compression plant, secondary filter, the precipitation fuel tank, dirty fuel tank, connect the pipeline of the said equipment and be arranged at stop valve on the pipeline, the air compression plant air-out is connected with secondary filter air inlet port, be provided with filter core in the secondary filter, the pipe outlet of secondary filter leads to the precipitation fuel tank, dirty fuel tank is led in the filtration ROLLING OIL outlet of secondary filter, the pipe outlet of precipitation fuel tank is connected to the entrance of secondary filter by second filter pump, it is characterized in that described secondary filter comprises first filtering tank and second filtering tank by the pipeline series connection, also be provided with stop valve on the pipeline that is used to connect, and first filtering tank and second filtering tank are distinguished separate connection in air compression plant by pipeline, the pipe outlet of first filtering tank and second filtering tank bottom all leads to the precipitation fuel tank, and dirty fuel tank is all led in the filtration ROLLING OIL outlet of first filtering tank and second filtering tank.

For improving filtering accuracy and filter quality, the described precision of being located at the precision of the filter core in second filtering tank greater than the filter core in first filtering tank.

Compared with prior art, advantage of the present utility model is: adopt two secondary filter jars, improved the filtering accuracy of ROLLING OIL greatly; Also prolong the life cycle of main filtration system filter core, reduced production cost; Can under non-stop-machine situation, change the filter core of secondary filter respectively, reduce downtime, improve operating efficiency; Eliminate the potential safety hazard of filtration system, guaranteed system stable operation.

Description of drawings

Fig. 1 is a ROLLING OIL filtration system structural representation in the prior art.

Fig. 2 is a ROLLING OIL filtration system structural representation among the utility model embodiment.

The specific embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Embodiment, with reference to figure 2, the ROLLING OIL filtration system in the present embodiment comprises main filtration system and cold-rolling mill secondary filter, main filtration system is connected by pipeline 12e with the first filter pump 1c by main filtering tank 3, is provided with filter core 33 in the main filtering tank 3.

The cold-rolling mill secondary filter comprises air compression plant 6, first filtering tank 1, second filtering tank 2, precipitation fuel tank 4, dirty fuel tank 5, connect the pipeline of the said equipment and be located at stop valve on the pipeline, and first filtering tank 1 and second filtering tank 2 are together in series by the pipeline 4e of centre.

Air compression plant 6 air-outs are connected with first filtering tank 1 by pipeline 3e, air compression plant 6 air-outs are connected with second filtering tank 2 by pipeline 9e, be respectively equipped with filter core 11 and filter core 22 in first filtering tank 1 and second filtering tank 2, and the filtering accuracy of filter core 22 is greater than the filtering accuracy of filter core 11.First filtering tank 1 leads to precipitation fuel tank 4, the second filtering tanks 2 by pipeline 7e outlet and leads to precipitation fuel tank 4 by pipeline 8e outlet, and, communicate by pipeline 5e connection between pipeline 7e and the pipeline 8e.

The filtration ROLLING OIL outlet of first filtering tank 1 is led to dirty fuel tank 5 by pipeline 3e, pipeline 4e and pipeline 6e, the filtration ROLLING OIL outlet of second filtering tank 2 is led to dirty fuel tank 5 by pipeline 11e, the pipe outlet of precipitation fuel tank 4 is connected to the entrance of first filtering tank 1 by pipeline 1e, the pipe outlet of precipitation fuel tank 4 is provided with overflow pipe 10e by the entrance that pipeline 2e is connected to second filtering tank 2 on pipeline 11e.

As shown in Figure 2, on pipeline 1e, be provided with hand stop valve 2d and hand stop valve 3d, on pipeline 4e, be provided with pneumatic stopping valve 7d and hand stop valve 6d, be respectively equipped with hand stop valve 5d, pneumatic stopping valve 8d, pneumatic stopping valve 13d, pneumatic stopping valve 14d, pneumatic stopping valve 12d, hand stop valve 11d, pneumatic stopping valve 1d, pneumatic stopping valve 9d and pneumatic stopping valve 10d on pipeline 6e, pipeline 3e, pipeline 7e, pipeline 8e, pipeline 5e, overflow pipe 10e, pipeline 12e, pipeline 9e and the pipeline 11e.

Filtering process: the dirty greasy dirt that adheres to from main filtering tank 3 inner filter cores 33 sweeps away, by oil drain pump 1c ROLLING OIL is discharged to precipitation fuel tank 4, by the second filter pump 2c ROLLING OIL is discharged to first filtering tank 1 and/or second filtering tank 2 along pipeline 1e and pipeline 2e respectively from precipitation fuel tank 4 then.

Under the normal filtration state, open hand stop valve 3d, pneumatic stopping valve 7d and hand stop valve 6d and pneumatic stopping valve 10d, close other stop valves, ROLLING OIL is by first filtering tank 1 and second filtering tank 2, through flowing to dirty fuel tank 5 after twice filtration like this.

When first filtering tank 1 quits work, when needing to change, open hand stop valve 4d, hand stop valve 6d and pneumatic stopping valve 10d, close other stop valves, ROLLING OIL flows to dirty fuel tank 5 by second filtering tank 2 after once filtering like this.

When second filtering tank 2 quits work, when needing to change, open hand stop valve 3d, pneumatic stopping valve 7d, hand stop valve 5d, close other pneumatic stopping valves, ROLLING OIL flows to dirty fuel tank 5 by first filtering tank 1 after once filtering like this.

In the time of 1 backwash of first filtering tank, close pneumatic stopping valve 7d, pneumatic stopping valve 9d and pneumatic stopping valve 12d, open pneumatic stopping valve 13d and pneumatic stopping valve 8d, the backwash of first filtering tank 1 is finished in air compression plant 6 work.

In the time of 2 backwashes of second filtering tank, close pneumatic stopping valve 12d, pneumatic stopping valve 10d and pneumatic stopping valve 8d, open pneumatic stopping valve 9d and pneumatic stopping valve 14d, the backwash of second filtering tank 2 is finished in air compression plant 6 work.

Claims

1, a kind of cold-rolling mill secondary filter, comprise air compression plant (6), secondary filter, precipitation fuel tank (4), dirty fuel tank (5), connect the pipeline of the said equipment and be arranged at stop valve on the pipeline, air compression plant (6) air-out is connected with secondary filter air inlet port, be provided with filter core in the secondary filter, the pipe outlet of secondary filter leads to precipitation fuel tank (4), dirty fuel tank (5) is led in the filtration ROLLING OIL outlet of secondary filter, the pipe outlet of precipitation fuel tank (4) is connected to the entrance of secondary filter by second filter pump (2c), it is characterized in that described secondary filter comprises first filtering tank (1) and second filtering tank (2) by pipeline (4e) series connection, also be provided with stop valve (7d on the pipeline that is used to connect (4e), 6d), and first filtering tank (1) and second filtering tank (2) are by pipeline (3e, 9e) the difference separate connection is in air compression plant (6), pipeline (the 7e of first filtering tank (1) and second filtering tank (2) bottom, 8e) precipitation fuel tank (4) is all led in outlet, and the filtration ROLLING OIL outlet of first filtering tank (1) and second filtering tank (2) all is connected leads to dirty fuel tank (5).

2, cold-rolling mill secondary filter according to claim 1 is characterized in that the described precision of being located at the precision of the filter core (22) in second filtering tank (2) greater than the filter core (11) in first filtering tank (1).