WO2011134192A1

WO2011134192A1 - Blowing-free clearing method for residual emulsion

Info

Publication number: WO2011134192A1
Application number: PCT/CN2010/074480
Authority: WO
Inventors: 丁文红; 贺文健; 杨威; 邹振华; 王毅
Original assignee: 中冶南方工程技术有限公司
Priority date: 2010-04-27
Filing date: 2010-06-25
Publication date: 2011-11-03
Also published as: CN101829693B; CN101829693A

Abstract

A blowing-free clearing method for residual emulsion includes the steps of blocking low inertia force backflow of the emulsion, blocking side channeling of the emulsion, blocking emulsion channeling in the intermediate-roll shifting space, blocking the emulsion condensate, rapidly draining the residual emulsion in the emulsion spraying beams, and preventing from splashing. The method enables the residual emulsion to be cleared in a simple and effective manner.

Description

No-purge emulsion residue removal method

Technical field

The invention belongs to the technical field of cold-rolled emulsified plaque treatment, and particularly relates to a non-purging emulsion residue removal method, which is applied to various cold rolling mill units.

Background technique

Residue of emulsion is a key factor that restricts the improvement of the finished product rate of cold rolled products and affects the quality of subsequent coating products. At present, cold rolling at home and abroad generally uses compressed air purging to treat emulsion residues. Due to the influence of the interference airflow field, the compressed air purge method can not completely eliminate the residual emulsion, but also cause environmental protection problems such as a large increase in energy consumption per ton of steel and large environmental noise.

The sources of emulsion residues are as follows:

1. When the single-stand reversing cold rolling mill is switched at the rolling pass, when the rolling speed is lower than 4m/s (the emulsion has low inertia force reflow), a large amount of emulsion for rolling lubrication flows back to the inlet side. There is a large amount of emulsion residue in the leading and trailing parts of the finished steel coil, which not only reduces the finished product rate of the cold rolled product, but also increases the consumption of rolling oil. Traditionally, a squeezing roller has been added at the inlet and outlet of the rolling mill. As shown in Fig. 1, the squeezing roller is used to block the reflux of the emulsion. In Fig. 1, the inlet squeezing roller 3 at the inlet smashes the emulsion flowing back in the frame to the inlet during the squeezing process, affecting the normal operation of the thickness gauge, and at the same time, it is inconvenient to collect due to the emulsified emulsion. Therefore, the consumption of the emulsion is increased. On the outlet side, due to the input of the outlet squeezing roller 5, the tension distribution between the outlet coiler and the frame is changed, resulting in difficulty in shape control.

2. During the rolling process of the cold rolling mill, the emulsion for rolling lubrication flows through the roll of the work roll at the edge of the strip to the strip at the exit of the mill, causing the emulsion to remain, as shown in Fig. 5.

Traditionally, a large flow of compressed air is applied to the edge of the roll to perform a side purge to block the turbulence of the emulsion. As shown in Figure 6. However, adopting the scheme shown in Figure 6 brings the following technical problems:

1. The purging airflows on the upper and lower surfaces of the strip interfere with each other, causing the turbulence at the edges to be completely unresolved;

2. The convection effect caused by the local large flow of compressed air will reduce the local temperature of the roll and change the thermal crown, which is not conducive to the shape control of the strip;

3. The compressed air purge of the strip at the edge of the strip will cause a local temperature drop of the roll, resulting in uneven stress on the side of the strip at the edge of the strip and shortening the service life of the roll;

4, the use of a large amount of compressed air, so that the electricity consumption per ton of steel increased rapidly;

5. The large flow of compressed air purge caused serious noise at the scene.

3. In the cold rolling process, in order to reduce the edge thinning of the strip to be rolled, the intermediate roll needs to be rolled according to the width of the strip, as shown in FIG. Since the spray beam does not move with the intermediate roll when the intermediate roll is rolled, a large amount of emulsion flows to the opposite side strip through the roll area in Fig. 1 after the intermediate roll is rolled, causing the emulsion to remain.

4. A large amount of emulsion is generally used as a medium for roll gap lubrication and roll cooling during the cold rolling mill rolling process. Due to the high temperature of the rolling process, the emulsion evaporates and the high speed operation of the roller in the frame causes the emulsion to splash, forming condensate at the entrance and exit of the frame; once dripped, it tends to contaminate the surface of the strip.

5. In the cold-rolled strip production unit (including single-stand rolling mill and continuous rolling mill), it is equipped with an emulsion spray beam device. Due to the limitation of equipment structure, the switching valves of the emulsion spray beam are generally set at a distance from the spray beam nozzle. Far away, therefore, in the rolling change of the pass, the residual emulsion in the spray beam will drip through the nozzle to the surface of the cold-rolled strip, which will greatly affect the surface quality and material of the strip in the production of cold-rolled strip. rate. At present, some units use compressed air purging to prevent dripping, but the effect is not ideal, and the production cost is high.

6. In the cold-rolled strip production unit frame (including single-stand rolling mill and continuous rolling mill), it is equipped with a splash-proof baffle device, and the splash-proof baffle is generally made of steel plate. During the rolling process, due to the faster rolling speed and higher roll speed, the emulsion from the roll to the splash guard will splash back everywhere, dripping and adhering to the strip surface. The high-speed running strip enters the coiling area, causing waste of the emulsion and excessive residual oil on the strip surface, which affects the cleaning of the board surface and the generation of emulsified spots, which greatly affects the product quality and the finished product rate. At present, some units take measures such as increasing the curtain, but the effect is not very satisfactory.

7. During the rolling process of the cold rolling mill, when the rolling speed increases to a certain value, the emulsion for the roll gap lubrication appears to the inlet side to recirculate. The higher the rolling speed, the larger the return flow, and the reflux The emulsion directly affects the thickness of the thickness gauge and affects normal rolling. This reflow is defined as a reflection reflow. The reflection reflow is determined by two factors: emulsion injection pressure and rolling speed. For the work roll gap lubrication at the inlet, high injection pressure will cause reflection reflow (this phenomenon has been accepted by most engineers). High rolling speeds also cause reflex reflux (not yet accepted), and the higher the rolling speed, the more severe the reflow is, given the constant injection pressure of the emulsion.

technical problem

It is an object of the present invention to provide a method for purifying a residue without a purge, which is simple.

Technical solution

In order to achieve the above object, the technical solution adopted by the present invention is a non-purge emulsion residue removal method, which is characterized in that it comprises the following steps:

1) Blocking of low inertia force backflow of emulsion: 1 Place a rubber scraper on the inlet side of the cold rolling mill (between the inlet coiler and the inlet cooling lubricant spray beam), and the rubber scraper on the inlet side is located in the strip. Passing above the line; providing a rubber scraper on the outlet side of the cold rolling mill, the rubber scraper on the outlet side is located above the strip passing line;

2 After the rolling mill switches the rolling pass, when the rolling speed of the cold rolling mill is lower than 4 m/s, the rubber scraper on the inlet side is lowered and pressed against the upper surface of the strip to block the emulsion backflow; When the rolling speed of the cold rolling mill is ≥4 m/s, the rubber scraper on the inlet side is lifted off the upper surface of the strip; in the process, the rubber scraper on the outlet side is always in the raised position;

2) Blocking of turbulent flow at the edge of the emulsion: an upper left injection baffle and an upper right injection baffle are disposed at the upper emulsion spray beam on the inlet side of the cold rolling mill, and are disposed at the lower emulsion spray beam at the inlet side of the cold rolling mill. The lower left injection baffle and the lower right injection baffle; according to the width of the incoming strip, the width between the upper left spray baffle and the upper right spray baffle is adjusted to make the spray area and the incoming strip of the emulsion of the upper emulsion spray beam The steel is equal in width and coincides; adjusting the width between the lower left injection baffle and the lower right injection baffle, so that the spray area of the emulsion of the lower emulsion spray beam is equal and coincident with the incoming strip;

3) Blocking of turbulent flow of intermediate roll nipple emulsification: a spray baffle is arranged at the emulsion spray beam on the inlet side of the intermediate roll of the cold rolling mill, and the spray baffle moves to block the nipple vacancy when the intermediate roll is smashed The emulsion spray beam is arranged such that the spray width of the emulsion spray beam matches the position of the intermediate roll train, and the emulsion is not sprayed at the intermediate roll idle position;

4) Interpretation of emulsion condensate: Herringbone guide groove is arranged on the beam of the outlet equipment and the beam of the inlet equipment of the cold rolling mill frame. The herringbone guide groove is located above the steel channel; the left end of the herringbone guide groove The projection line in the horizontal plane is located on the left side of the left end of the strip in the rolled state, and the projection line of the right end of the herringbone guide trough in the horizontal plane is located on the right side of the right end of the strip in the rolled state;

5) Rapid drainage of the emulsion spray beam: on the emulsion spray beam (refers to all the single emulsion spray beams, such as the emulsion spray beam 31, the lower emulsion spray beam 43, the emulsion spray beam 52 on the inlet side of the intermediate roll) An emulsion drainage beam rapid drainage device; an emulsion spray beam rapid drainage device, comprising a perforated end cover, a first connecting pipe, an electromagnetic water valve and a second connecting pipe; the perforated end cover is bolted and an emulsion The spray beam is connected, the upper end of the first connecting pipe is connected with the hole end cover by a welded structure, and the upper end of the electromagnetic water valve is connected with the lower end of the first connecting pipe, and the lower end of the electromagnetic water valve and one end of the second connecting pipe The other end of the second connecting pipe is connected by a steel pipe or a rubber hose to the emulsion collecting tray; when the rolling is switched, the emulsion spray beam is closed, and the electromagnetic water valve is opened, and the emulsion is sprayed into the beam. The residual emulsion is discharged cleanly;

6) Splash prevention: a guide groove is fixed on the splash-proof surface of the splash guard (splash-proof steel plate), the left end of the guide groove is connected with the left draft tube, and the right end of the guide groove is connected to the right guide tube The anti-splashing plate (splashing steel plate) has a layer of adsorbing material fixed on the splashing surface, and the layer of adsorbing material is located above the guiding trough.

Beneficial effect

The invention has the beneficial effects that the invention completely changes the traditional emulsion residual treatment method, instead of blowing off the emulsion which has fallen on the finished strip by compressed air, but starting from the source of the emulsion residue, Breaking the source of the residual emulsion, prohibiting the emulsion from falling on the finished strip, fundamentally solving the problem of emulsified spots. The above solution not only effectively solves the problem of residual emulsion on the surface of the finished product, but also improves the surface quality of the rolled product, and reduces the rolling power consumption by eliminating the use of large-flow compressed air for blocking the emulsion. About 30%, rolling oil consumption is also reduced, while reducing environmental noise pollution.

1. Blocking of low inertia force reflux of emulsion: The method is simple, which can prevent the emulsion from flowing back during low speed rolling of the rolling mill.

2. Blocking the turbulence at the edge of the emulsion: the upper right spray baffle and the left upper spray baffle, the lower left spray baffle and the lower right spray baffle move to ensure the opening degree between the spray baffle and the spray baffle. The width of the strip is consistent; it is ensured that the emulsion is not sprayed in the area other than the strip width, which effectively avoids the problem of turbulence of the ultra-wide jet emulsion to the outlet side. The emulsified plaque due to the turbulence of the roll gap is solved by changing the spray area of the emulsion spray beam. The invention changes the traditional solution to the problem, and does not use the compressed air purging method to treat the emulsion which has flowed to the surface of the finished strip steel, which not only avoids the above-mentioned problems caused by the compressed air purging, but also, since the present invention is completely Preventing the emulsion from contacting the finished strip, thus truly improving the surface quality of the product and reducing rolling fuel consumption.

3. Blocking the turbulent flow of the intermediate roll nipple emulsifier: changing the spray beam spray area to avoid turbulent flow of the emulsion at the nipple vacancy. The invention changes the conventional solution to the problem, does not adopt the method of blocking the emulsion which has been turbulent to the opposite side of the roll, but the cause of the turbulence of the intermediate roll emulsion, that is, the emulsion after the intermediate roll roll The injection area of the spray beam is inconsistent with the position of the intermediate roll. The key reason for the emulsion to flow to the opposite side of the strip at the idler roll of the intermediate roll is to control the injection of the emulsion spray beam as shown in Figure 2. In the region, the spray area of the emulsion is matched with the position of the intermediate roll after the roll, and the emulsion is not sprayed on the intermediate roll roll, thereby fundamentally solving the problem of emulsification caused by the turbulence of the intermediate roll roll. .

4. Blocking of emulsion condensate: The herringbone guiding trough is used to guide the condensate droplets of the emulsion to the outside of the strip, which has the characteristics of simple method.

5. The electromagnetic water valve can be interlocked through the electrical system and the emulsion spray beam. When the emulsion spray beam is working, that is, when the emulsion spray beam is opened to spray the emulsion, in order to prevent the emulsion from being left out of the device, At the same time, the electromagnetic water valve is closed to ensure the normal operation of the emulsion spray beam. When the rolling replacement of the emulsion spray beam is closed, the electromagnetic water valve is opened, and the residual emulsion in the pipeline is passed through the device of the utility model. The discharged emulsion collection tray ensures that the residual emulsion does not drip onto the strip through the nozzle.

6. The adsorbent soft material on the splash guard (splash steel plate) can prevent the high-speed emulsion from splashing back. The guide groove can guide a large amount of emulsion to both sides of the strip in time; the emulsion is sprayed to the splash guard. After the plate is no longer splashed and the emulsion on the splash guard can be drained in time, so that the emulsion flows into the emulsion collection tray in time. Therefore, the emulsion on the splash guard is prevented from splashing everywhere, dripping onto the surface of the strip, affecting the surface quality of the strip, and the splash proof effect is good.

DRAWINGS

Figure 1 is a diagram of a conventional emulsion reflux treatment scheme;

Figure 2 is a schematic diagram of the principle of the present invention;

Figure 3 is a front view of the emulsion low inertia force backflow blocking device of the present invention;

Figure 4 is a right side view of Figure 3;

Figure 5 is a schematic view of the turbulent flow at the edge of the emulsion;

Figure 6 is a conventional emulsion side turbulence solution diagram;

Figure 7 is a schematic structural view of an emulsion side turbulence blocking device of the present invention;

Figure 8 is a cross-sectional view taken along line A-A of Figure 7;

Figure 9 is a schematic view of the emulsion residue caused by the intermediate roll roll;

Figure 10 is a schematic view showing the structure of an intermediate roll nip vacancy emulsion turbulence blocking device of the present invention.

Figure 11 is a cross-sectional view taken along line B-B of Figure 10;

Figure 12 is a schematic structural view of a herringbone guide groove according to the present invention;

Figure 13 is a cross-sectional view taken along line C-C of Figure 12;

Figure 14 is a schematic view showing the structure of the rapid drainage device for the emulsion spray beam of the present invention;

Figure 15 is a cross-sectional view taken along line D-D of Figure 14;

Figure 16 is a partial enlarged view of Figure 14;

Figure 17 is a schematic view of single-stand reversible rolling;

Figure 18 is a front elevational view of the progressive flow guiding splash guard of the present invention;

Figure 19 is a left side view of Figure 18.

Figure 20 is a schematic view showing the backflow blocking of the emulsion of the present invention;

Figure 1-4: 1-unwinder, 2-inlet coiler, 3-inlet squeeze roller, 4-inlet cooling lubricant jet beam, 5-outlet squeeze roller, 6-coiler, 7-inlet Side emulsion low inertia force backflow blocking device, 8-inlet anti-wrap guide, 9-outlet anti-wrap guide, 10-outlet side emulsion low inertia force backflow blocking device, 11-right side plate, 12-right Compression nut, 13-right bottom plate, 14-encoder, 15-motor, 16-first worm gear, 17-link, 18-left press, 19-left roll, 20-shield, 21 - chute body, 22-upper plate, 23-lower plate, 24-rubber scraper, 25-second worm gear, 26-left bottom plate, 27-left side plate; arrows in Figure 1-2 indicate Rolling direction.

Figure 5-8: 28-upper rail, 29-screw, 30-first nut, 31-up emulsion spray beam, 32-feed strip, 33-support bearing, 34-upper spray baffle, 35-coupling, 36-gear motor, 37-spray beam protection cover, 38-second nut, 39-lower rail, 40-upper left jet baffle, 41-lower left jet baffle, 42-lower right jet baffle , 43-low emulsion spray beam, 44-upper intermediate roll, 45-upper work roll, 46-lower work roll, 47-lower intermediate roll, 48-side turbulent zone, 49-compressed air purge beam, 50 - Upper and lower compressed air purges the neutral point of the beam purge area. The arrows in Figs. 5 and 7 indicate the rolling direction.

Figure 9-11: 51-rail, 52- emulsion spray beam on the inlet side of the intermediate roller, 53-support bearing housing, 54-jet baffle, 55-nut, 56-screw, 57-coupling, 58 -Gear motor, 59-jet beam guard, 60-up support roll, 44-upper intermediate roll, 45-up work roll, 46-low work roll, 47-lower intermediate roll, 61-lower support roll, 62-窜Flow zone (roller roll zone), 32-feed strip; arrows in Figure 9 indicate the direction of the roll, and arrows in Figure 11 indicate the roll direction.

In Figure 12-13: 32-feed strip (strip in rolled condition), 63-outlet beam, 64- herringbone guide, 65-fixed rod, 66-rolling centerline.

In Figure 14-16: 67-perforated end cap, 68-first connecting tube, 69-connecting flange, 70-electromagnetic water valve, 71-second connecting tube.

Figure 17-19: 72 - splash guard (splash resistant steel); 73 - layer of adsorbent material; 74 - diversion trough; 75 - left diversion tube, 76 - right diversion tube, 77 - rolling line , 78-emulsion splash, dripping area, 79-step diversion splash guard, 80-emulsion spray beam; 60-up support roll, 44-upper roll, 45-up work roll, 46-down Work roll, 47-lower intermediate roll, 48-lower support roll. The arrows in Fig. 17 indicate the rolling direction.

Figure 20: 1-unwinder, 32-feed strip, 81-first thickness gauge, 8-inlet anti-wrap guide, 9-outlet anti-wrap guide, 80-emulsion spray beam, 79-step guide Flow splash guard, 82-second thickness gauge, 6-coiler, 60-up support roll, 44-upper intermediate roll, 45-up work roll, 46-low work roll, 47-lower intermediate roll, 61-lower support roller.

BEST MODE FOR CARRYING OUT THE INVENTION

There is no purge and emulsion residue removal method, which includes the following steps:

First, no purge of emulsion residue removal (method):

1) On the inlet side of the cold rolling mill, an emulsion low inertia force backflow blocking device 7 (between the inlet coiler 2 and the inlet cooling lubricant spray beam 4) on the inlet side is provided, and the emulsion on the inlet side has a low inertia force. The rubber scraper of the reflux blocking device 7 is located above the strip passing line; the outlet side of the cold rolling mill is provided with an emulsion low inertia force backflow blocking device 10, and the outlet side emulsion is low inertia force backflow blocking The rubber scraper of the device is located above the strip passing line;

2) After the rolling mill switches the rolling pass, when the rolling speed of the cold rolling mill is lower than 4 m/s, the rubber scraper of the emulsion low inertia force backflow blocking device 7 on the inlet side is lowered and pressed against The upper surface of the strip is used to block the emulsion backflow; when the rolling speed of the cold rolling mill is ≥4 m/s, the rubber scraper of the emulsion low inertia force backflow blocking device 7 on the inlet side is lifted off the upper surface of the strip. During this process, the rubber scraper of the emulsion low inertia force backflow blocking device on the outlet side is always in the raised position (above the upper surface of the strip).

The rubber scraper on the outlet side is fed in the second pass rolling (the rolling direction is opposite to the first pass), and the input speed is the same as the first pass (when the rolling speed of the cold rolling mill is lower than 4 m/s) , the rubber scraper of the low-inertial force backflow blocking device 7 of the emulsion on the outlet side is lowered, pressed against the upper surface of the strip to block the reflux of the emulsion; when the rolling speed of the cold rolling mill is ≥ 4 m/s The rubber scraper of the emulsion low inertia force backflow blocking device 7 on the outlet side is lifted off the upper surface of the strip).

When the strip is at the beginning of the forward rolling process as shown in Fig. 2, the inlet cooling lubricating fluid spray beam (inlet side work roll spray beam) 4 sprays the emulsion into the rolling deformation region to meet the rolling lubrication demand. When the rolling mill switches the rolling pass and starts rolling, the reflow phenomenon is severe due to the lower speed. At this time, the rubber scraper on the inlet side is lowered and pressed against the upper surface of the strip to block the backflow of the emulsion to avoid the measurement error of the inlet thickness gauge. As the rolling speed is gradually increased, the emulsion is brought back into the frame by the inertial force, and at this time, the rubber scraper on the inlet side can be lifted. At the same time, in order to further reduce the rolling energy consumption and improve the blocking effect, when the rolling speed is lower than 4 m/s, the emulsion flow control mode is set to be positively correlated with the rolling speed, and the emulsion at low speed is reduced. The amount of injection.

Providing a method for preventing backflow of the emulsion in a low-speed rolling condition without increasing the length of the unit and without affecting the realization of the relevant functions. Firstly, based on the field experiment, the correlation between emulsion reflux and rolling speed, emulsion injection pressure and emulsion reflux distance was obtained. It is concluded that low inertia force reflow is only negatively correlated with rolling speed, and the rolling speed is high. At 4 m/s, the low inertia force reflow phenomenon disappears. Therefore, the present invention first determines that the reflux blocking strategy is to block the reflux emulsion by a wiper plate at a low speed (rolling speed of less than 4 m/s), and at high speed, the strip will be inerted. The emulsion is carried into the roll gap and no additional means is required to handle the reflux emulsion.

The emulsion low inertia force backflow blocking device for realizing the above method, as shown in Figs. 3 and 4, comprises a lifting device, a bracket, an upper lining plate 22, a lower lining plate 23, a connecting bolt, a rubber squeegee 24, and the bracket is fixed at On the lifting device (the lifting device drives the bracket to lift), the bracket is provided with a sliding slot, the upper end of the lower lining plate 23 is provided with a slider, the slider is located in the sliding slot, and the upper end of the rubber squeegee 24 is located on the upper lining plate 22 and below Between the lining plates 23, the upper lining plate 22, the rubber squeegee 24 and the lower lining plate 23 are fixedly connected by a connecting bolt (the rubber squeegee 24 can be raised and lowered; and can be moved left and right to adjust the left and right positions of the strip).

The lifting device comprises a motor 15 with an encoder 14, a first worm gear device 16, a connecting rod 17, and a second worm gear device 25. The output shaft of the motor 15 is rotated by the coupling and the first worm gear device 16. The input shaft is connected, the rotating output shaft of the first worm gear device 16 is connected to the right end of the connecting rod 17 by the coupling, and the left end of the connecting rod 17 is connected by the coupling to the rotating input shaft of the second worm gear device 25; The lifting rod of the worm gear unit 16 is fixedly connected to the right bottom plate 13 of the bracket by the right pressing nut 12, and the lifting rod of the second worm gear unit 25 is fixedly connected to the left bottom plate 26 of the bracket by the left pressing nut.

The bracket includes a right side plate 11, a right bottom plate 13, a chute body 21, a left pressing cover 18, a right pressing cover, a left bottom plate 26, and a left side plate 27. The chute body 21 is provided with a chute (lower) The slider of the upper end of the lining plate 23 is located in the sliding slot), and the right end of the sliding groove body 21 is fixedly connected with the right bottom plate 13 by the right pressing cover (the right end of the sliding groove body 21 is inserted into the right pressing cover, and the right pressing cover is The right bottom plate 13 is fixedly connected), and the left end of the chute body 21 is fixedly connected to the left bottom plate 26 by the left pressing cover 18 (the left end of the chute body 21 is inserted into the left pressing cover, and the left pressing cover is fixedly connected with the left bottom plate 26) The upper end of the right side plate 11 is fixedly connected (e.g., welded) to the right bottom plate 13, and the upper end of the left side plate 27 is fixedly coupled (e.g., welded) to the left bottom plate 26.

A guard roller 20 is disposed between the right side plate 11 and the left side plate 27. The right end of the guard roller 20 is connected by a bearing to a right roller seat on the right side plate 11, and the left end of the guard roller 20 is supported by a bearing and a left side plate. The left roller holder 19 on the 27 is connected (the guard roller 20 can be rotated).

The rubber squeegee on the inlet side of the low inertia force backflow blocking device is called the rubber scraper on the inlet side, and the rubber squeegee on the outlet side of the low inertia force backflow blocking device is called the rubber scraper on the outlet side.

Application of Emulsion Low Inertia Force Backflow Blocking Device: As shown in Fig. 2, the present invention uses a rubber scraper method to prevent emulsion backflow during low speed rolling of a rolling mill.

After the rolling mill switches the rolling pass, the rubber scraper 24 of the inlet side emulsion low inertia force backflow blocking device is pressed to the strip surface by the motor 15 and the worm gear device 16, and the rubber scraper 24 is depressed. It is controlled by the encoder 14 that is provided by the motor. After confirming that the rubber blade 24 is pressed into place, the rolling mill starts rolling, and the emulsion is started to be rolled in association with the speed. When the emulsion is reflowed, the rubber scraper 24 prevents the emulsion from flowing back, ensuring normal rolling of the unit. When the rolling speed is further increased, the emulsion is brought into the frame by the high-speed rolling strip under the action of inertial force. When the unit is accelerated to 4m/s, the rubber scraping of the inlet side emulsion low inertia force backflow blocking device The plate 24 is automatically lifted by the motor 15 and the worm gear unit 16. During this process, the rubber scraper of the outlet side emulsion low inertia force backflow blocking device is always in the raised position. The guard roller 20 protects the rubber blade from being damaged when the unit has a broken belt.

2. Blocking of turbulent flow at the edge of the emulsion (method): an upper left injection baffle 40 and an upper right injection baffle 34 are disposed at the upper emulsion spray beam 31 on the inlet side of the cold rolling mill, under the inlet side of the cold rolling mill The lower left injection baffle 41 and the lower right injection baffle 42 are disposed at the emulsion spray beam 43; and the width between the upper left injection baffle 40 and the upper right ejecting baffle 34 is adjusted according to the width of the incoming strip 32 to make the upper emulsion The spray area of the emulsion of the spray beam 31 is equal and coincident with the incoming strip 32 (equal to the width of the incoming strip 32, so that the emulsion sprayed by the upper emulsion spray beam 31 is only sprayed onto the incoming strip 32) Adjusting the width between the lower left injection baffle 41 and the lower right injection baffle 42 so that the spray area of the emulsion of the lower emulsion spray beam 43 is equal and coincident with the incoming strip 32 (with the incoming strip 32 The width is equal, so that the emulsion sprayed by the lower emulsion spray beam 43 is sprayed only on the incoming strip steel 32).

The invention is directed to the cause of turbulence at the edge of the emulsion, that is, since the spray area of the emulsion spray beam is larger than the strip width, at the roll gap of the work roll exceeding the width of the strip, the strip is not blocked due to the sealing of the strip. flow. By using the device for controlling the spray width of the emulsion spray beam as shown in Fig. 7, by controlling the position of the spray baffle in Fig. 7, the spray area of the emulsion is equal and coincident with the strip, and the gap is solved from the source. Emulsifying plaque caused by turbulence.

The emulsion edge turbulence blocking device for realizing the above method, as shown in FIGS. 7 and 8, includes an upper rail 28, a lead screw 29, a first nut 30, a support bearing seat 33, an upper right injection flap 34, and a joint The shaft 35, the gear motor 36, the second nut 38, the lower rail 39, the upper left injection flap 40, the lower left injection flap 41, and the lower right injection flap 42; the middle portion of the screw 29 is a polished rod (shaft), and the screw 29 The left and right parts are respectively provided with external threads, and the external thread of the left part of the screw rod 29 is opposite to the thread of the external thread of the right part of the screw rod 29; the left side of the screw rod 29 is screwed with the first nut 30, and the screw rod 29 is right. The second screw 38 is screwed, and the middle portion of the screw rod 29 is connected to the support bearing seat 33 by a bearing, and the support bearing seat 33 is fixed (such as a bolt connection) on the upper emulsion spray beam 31; the gear motor 36 is fixed (such as a bolt connection). On the upper emulsion spray beam 31, the output shaft of the gear motor 36 is connected to the right end of the screw rod 29 by the coupling 35; the upper rail 28 and the lower rail 39 are arranged in a direction perpendicular to the rolling direction, and the upper rail 28 is fixed ( Such as bolting or welding) on the upper emulsion spray beam 31 (the upper rail 28 is located on the incoming strip 32) The lower rail 39 is fixed (such as bolted or welded) on the lower emulsion spray beam 43 (the upper emulsion spray beam 31 and the lower emulsion spray beam 43 are conventional equipment; the lower rail 39 is located at the incoming strip 32) The upper end of the upper left injection baffle 40 is fixedly connected to the first nut 30 (such as bolted or welded), and the upper end of the upper right injection baffle 34 is fixedly connected with the second nut 38 (such as bolted or welded), and the upper left injection block The upper plate and the upper right injection baffle 34 are located on the upper rail 28 (the slider, the chute can be adopted, the upper left injection baffle 40 and the upper right ejecting baffle 34 can be moved along the upper rail 28), and the upper left injection baffle 40 is located. The left side of the upper right injection baffle 34; the lower left injection baffle 41 and the lower right injection baffle 42 are both located on the lower rail 39 (a slider, a chute can be used, a lower left injection baffle 41, a lower right injection baffle 42) The left lower injection baffle 41 is located on the left side of the lower right injection baffle 42, and the lower left injection baffle 41 is fixedly connected to the upper left injection baffle 40 by a connecting plate (such as bolting or welding, or One-piece structure), lower right injection flap 42 And right upper connecting plate is fixedly connected to the ejection orifice 34 (e.g., bolted or welded, or may be a unitary structure).

When the cold rolling mill is rolled, the PLC calculates the moving distance of the jetting baffle in the emulsion side turbulence blocking device according to the width dimension of the rolled strip. After the device receives the command, the gear motor 36 (which can be reversed and reversed) drives the screw 29 to rotate through the coupling 35, thereby driving the first nut 30 and the second nut to move (simultaneously moving inward, or simultaneously moving outward), The upper right injection baffle 34 and the upper left injection baffle 40, the lower left injection baffle 41 and the lower right injection baffle are moved on the upper rail 28 and the lower rail 39 to a designated position to ensure an opening between the ejection baffle and the ejection baffle. The width of the strip 32 is the same as the width of the incoming strip 32. It is ensured that the emulsion is not sprayed in the area other than the strip width, and the problem of turbulence of the ultra-wide jet emulsion to the outlet side is effectively avoided.

3. Blocking of turbulent flow of intermediate roll nipple emulsification solution (method): a spray baffle is arranged at the emulsion spray beam on the inlet side of the intermediate roll of the cold rolling mill, and the spray baffle moves to block the intermediate roll when the intermediate roll is smashed The emulsion spray beam at the nipple vacancy makes the spray width of the emulsion spray beam match the position of the intermediate roll train, and the emulsion is not sprayed at the intermediate roll vacancy.

The spray baffle is connected to the moving mechanism, and the moving mechanism comprises a guide rail 51, a support bearing seat 53, a nut 55, a lead screw 56, a coupling 57, and a gear motor 58.

The intermediate roll nip vacancy turbulence blocking device for realizing the above method, as shown in Figs. 10 and 11, comprises a spray damper and a moving mechanism, and the spray damper is connected to the moving mechanism. The moving mechanism comprises a guide rail 51, a support bearing seat 53, a nut 55, a lead screw 56, a coupling 57, a gear motor 58; the gear motor 58 is fixed (such as bolted or welded) on the body of the cold rolling mill, and the gear motor 58 The output shaft is connected to one end of the lead screw 56 by a coupling 57, and the other end of the lead screw 56 is connected to the support bearing seat 53 by a bearing (the screw 56 can rotate), and the support bearing seat 53 is fixed (such as bolted or welded). On the emulsion injection beam 52 on the inlet side of the intermediate roller, a nut 55 (constituting a screw pair) is screwed on the screw 56, and the upper end of the injection flap 54 is fixedly connected to the nut 55 (for example, welding, the ejection flap moves with the nut) The spray baffle 54 is located in front of the emulsion nozzle (which can block the emulsion spray), and the spray baffle 54 is located on the guide rail 51 (a slider or a chute can be adopted, and the slider of the spray baffle 54 is used in this embodiment). The chute on the guide rail 51, that is, the spray flap moves along the guide rail, and the guide rail 51 is fixed to the spray beam shield 59.

When the cold rolling mill is rolling, the PLC calculates the amount of the intermediate roller according to the width dimension of the rolled strip, controls the supporting roller, and calculates the movement of the spraying baffle in the device according to the amount of the intermediate roller. distance. After the device receives the command, the gear motor 58 (positive and reverse rotation) drives the coupling 57 to drive the screw 56 to rotate, thereby driving the nut 55 and the spray shutter 54 to move to the designated position on the guide rail 51 to block the idle position of the roller. At the spray beam, the spray width of the spray beam is matched with the position of the intermediate roll train, and the emulsion is not sprayed at the intermediate roll idle position to avoid turbulent flow of the emulsion.

4. As shown in Figure 12 and Figure 13, the emulsion condensate is blocked (method):

1) A herringbone guide groove 64 is arranged on the exit device beam of the cold rolling mill frame and the inlet device beam 63 (the herringbone guide groove 64 is composed of a left baffle and a right baffle, and the left baffle and the right baffle The upper end is fixed, the left baffle and the right baffle form a herringbone; the herringbone guide groove 64 is fixed on the beam by the fixing rod 65), the herringbone guide groove 64 is located above the strip passage; the herringbone guide groove 64 The projection line of the left end in the horizontal plane is located on the left side of the left end of the incoming strip (rolled state) 32, and the projection line of the right end of the herringbone guide groove 64 in the horizontal plane is located at the right end of the incoming strip (rolled state) 32. Right side (left side in the figure 12 is left, right side is right); emulsion droplets are guided by the chevron-shaped guide groove 64 to flow from the outlet device beam, the operating side of the inlet device beam, and the transmission side to avoid dripping Above the strip.

2) A movable compressed air nozzle is arranged on the exit device beam of the cold rolling mill frame and the inlet device beam 63. The movable compressed air nozzle is located above the steel channel so as to be ready to exit when the rolling is paused. The equipment beam and the inlet device beam 63 are strongly purged to remove droplets.

5. Rapid drainage of emulsion spray beam (method): An emulsion spray beam rapid drainage device is arranged on the emulsion spray beam (refer to all single emulsion spray beams).

As shown in FIG. 14, FIG. 15, and FIG. 16, the emulsion spray beam rapid drainage device comprises a perforated end cover 67, a first connecting pipe 68, an electromagnetic water valve 70, a second connecting pipe 71, and a perforated end cover 67. Connected to the emulsion spray beam 80 by bolt connection, the upper end of the first connecting pipe 68 is connected with the perforated end cover 67 by a welded structure (the first connecting pipe communicates with the hole of the perforated end cap), and the electromagnetic water valve 70 The upper end portion is connected to the lower end portion of the first connecting pipe 68 (connected by the connecting flange 69, and may also be screwed), and the lower end portion of the electromagnetic water valve 70 is connected to one end portion of the second connecting pipe 71 (using the connecting flange) 69 is connected, and the threaded connection can also be used. The other end of the second connecting pipe 71 is connected to the emulsion collecting tray by a steel pipe or a rubber hose.

When the cold rolling mill is rolling, the emulsion spray beam is opened for normal operation, and when the rolling is switched, the emulsion spray beam is closed, and the electromagnetic water valve 70 is opened to discharge the residual emulsion in the emulsion spray beam. The electromagnetic water valve and the emulsion spray beam control valve are interlocked in the electrical control system, and are automatically turned on and off according to the production situation.

6. The splash guard is changed into a step-by-step flow-proof splash guard, and a guide groove 74 is fixed on the splash-proof surface of the splash guard 72. The left end of the guide groove 74 is connected to the left guide tube 75. The right end of the flow guiding groove 74 communicates with the right guiding pipe 76. The splashing surface of the splash guard 72 is fixed with an adsorbent material layer 73, and the adsorbing material layer 73 is located above the guiding groove 74.

As shown in FIG. 17, FIG. 18 and FIG. 19, the step-by-step deflecting splash guard includes a splash guard (splash resistant steel plate) 72, an adsorbent material layer 73, a guide groove 74, and a left draft tube 75. The right guiding tube 76 and the splash-proof surface of the splash guard 72 are fixed with a guiding groove 74. The left end of the guiding groove 74 communicates with the left guiding tube 75, and the right end of the guiding groove 74 and the right guiding tube 76 is connected; a splash-proof surface of the splash guard 72 is fixed with an adsorbent material layer 73 (soft absorbent material such as cotton material, sponge or foam, etc.), and the adsorbent material layer 73 is located in the flow guiding groove 74. Above.

The flow guiding grooves 74 are at least two or more. The guide groove 74 has a cross section of a herringbone shape. The guide groove 74 has a shape of a long shape in the longitudinal direction, a middle portion is high, and both sides are low (as shown in FIG. 19).

Experiments have shown that after the use of the present invention, there is no occurrence of emulsion splashing everywhere, and the phenomenon of dripping onto the surface of the strip occurs, and the splash-proof effect of the present invention is good.

When rolling, the roller system rotates at a high speed, and the emulsion attached to the roller surface is smashed onto the splash guard around the roller body. The soft absorbent material on the surface of the splash guard prevents the emulsion from further splashing. Adsorption and the emulsion enters the draft tube along the herringbone guide groove on the splash guard. Finally, the guide tube diverts the emulsion into the emulsion collection tray.

Seven, emulsion reflection reflux blocking method:

As shown in FIG. 20, the position of the spray beam is adjusted according to the maximum rolling speed, the injection pressure of the emulsion at the highest rolling speed, and the amount of reflection of the emulsion under the above-mentioned working conditions. By controlling the reflection pressure of the emulsion, the reflux distance of the emulsion which reflects backflow is controlled to ensure that the reflux emulsion does not affect the measurement of the measuring instrument.

Claims

1. A method for purifying an emulsion residue without purging, characterized in that it comprises the following steps:

1) Blocking of low inertia force backflow of emulsion: 1A rubber scraper is arranged on the inlet side of the cold rolling mill, the rubber scraper on the inlet side is located above the strip passing line; a rubber scraper is arranged on the outlet side of the cold rolling mill , the rubber scraper on the outlet side is located above the strip passing line;

5) Rapid drainage of emulsion spray beam: an emulsion spray beam rapid drainage device is set on the emulsion spray beam; emulsion spray beam rapid drainage device, including perforated end cover, first connecting pipe, electromagnetic water valve, a connecting pipe; the perforated end cover is connected with the emulsion spray beam by a bolt connection, and the upper end of the first connecting pipe is connected with the perforated end cover by a welded structure, and the upper end of the electromagnetic water valve and the lower end of the first connecting pipe Connected, the lower end of the electromagnetic water valve is connected to one end of the second connecting pipe, and the other end of the second connecting pipe is connected to the emulsion collecting tray by a steel pipe or a rubber hose; when the rolling is switched, the emulsion is sprayed The beam is closed and the electromagnetic water valve is opened to discharge the residual emulsion in the emulsion spray beam;

6) Splash prevention: a guide groove is fixed on the splash-proof surface of the splash guard, the left end of the guide groove is connected with the left draft tube, and the right end of the guide groove is connected with the right guide tube; A layer of adsorbent material is fixed on the splash-proof surface of the plate, and the layer of adsorbent material is located above the guide groove.