CN115889051A

CN115889051A - Device for preventing slot type nozzle from being blocked

Info

Publication number: CN115889051A
Application number: CN202111166807.9A
Authority: CN
Inventors: 刘云峰; 何小丽; 耿杨壘; 汤同开
Original assignee: Shanghai Meishan Iron and Steel Co Ltd
Current assignee: Shanghai Meishan Iron and Steel Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2023-04-04

Abstract

The invention relates to a device for avoiding blockage of a slot nozzle, which comprises a connecting part arranged on the left side of a rotary slot nozzle gas pipeline and a rotary slot nozzle assembly arranged at the right side end of the gas pipeline, wherein a group of gear rotating devices are arranged on the gas pipeline, are fixedly arranged outside the gas pipeline and drive the device to rotate through the rotation of gears; the invention is designed aiming at the defects of the prior device, can ensure that the slot nozzle forms a good air knife to sweep the emulsion on the working roller, can also ensure that the slot nozzle is prevented from being blocked in the emulsion spraying and blowing work, and improves the steel rolling continuity so as to improve the economic benefit; secondly, the self-cleaning device can self-clean the blocked slot type nozzle while working, thereby prolonging the service life of the nozzle, prolonging the running period of the cold-rolled steel strip and reducing the cost brought by replacing the nozzle; the invention has simple operation, and can finish the emulsion purging work by a single person through the PLC intelligent control system, thereby reducing the labor cost.

Description

Device for preventing slot type nozzle from being blocked

Technical Field

The invention relates to a device, in particular to a device for avoiding blockage of a slit nozzle, and belongs to the technical field of cold rolled steel.

Background

And (3) steel rolling, namely changing steel ingots among rotating rollers, wherein the pressure processing process of the shape of the steel billets is called steel rolling. The purpose of rolling is the same as other press working, on the one hand, to obtain the desired shape, for example: steel plates, steel strips, wire rods, various types of steel sections, and the like; on the other hand, in order to improve the internal quality of steel, in the cold rolling process, high heat is generated due to the extrusion between the rolls and the strip, so that the strip is deformed, and in order to remove the deformation heat, emulsion is mostly used as a lubricant and a coolant in the cold rolling production. However, the surface of the rolled strip must be kept clean, so that an emulsion purging device is provided at the outlet of the last stand of the rolling mill. The device adopts compressed air to blow off emulsion on the surface of the strip steel, if the blowing is not clean, the emulsion can be remained on the surface of the strip steel to form emulsion spots, the surface quality of the strip steel is influenced, and the strip steel can be seriously rusted. Based on this, researchers have proposed a set of emulsion blowing devices including a straight blow nozzle, an inclined blow nozzle, a slit nozzle, and a suction nozzle. However, in the using process, as the direction of the slot-type nozzle is always upward, the sprayed emulsion can block the nozzle, so that blowing is stopped, the emulsion removal rate is reduced, and the quality of the strip steel is influenced. The object of the invention is to solve the above-mentioned problems by providing a rotatable and self-cleaning slot nozzle which avoids clogging.

Disclosure of Invention

The invention provides a device for avoiding the blockage of a slot nozzle, aiming at the problems in the prior art, and the technical scheme adopts a rotary slot nozzle structure to replace the conventional cold-rolled strip steel slot nozzle, so that the problem of nozzle blockage caused by splashing when the slot nozzle sprays emulsion is solved. Therefore, the removal rate of the emulsion on the surface of the strip steel is improved, the influence of the emulsion on the surface quality of the strip steel is eliminated, meanwhile, the service life of the nozzle is longer, the running period of the cold-rolled strip steel is prolonged, the cost brought by replacing the nozzle is reduced, and the economic benefit can be improved.

In order to achieve the purpose, the technical scheme is that the device for avoiding the blockage of the slot nozzle comprises a connecting component arranged on the left side of a rotary slot nozzle gas transmission pipeline and a rotary slot nozzle component arranged at the right side end of the gas transmission pipeline, wherein the connecting component is connected with the rotary slot nozzle component in a welding mode and the like, a group of gear rotating devices are arranged on the gas transmission pipeline, the gear rotating devices are fixedly arranged outside the gas transmission pipeline, and the gear rotating devices drive the device to rotate through the rotation of gears. The rotary joint type nozzle is characterized in that a set of bearing embedded in the gas conveying pipe is arranged on the connecting part, the bearing is used for being connected with the gas inlet pipe, the rotary joint type nozzle is integrated with the gas conveying pipe, the gas conveying pipe is driven by a gear to rotate, so that the rotary joint type nozzle is capable of rotating 360 degrees, and four air flow control structures capable of translating along the direction of the gas conveying pipe are arranged at the top end of the nozzle and used for controlling the size of the gap on the rotary joint type nozzle and controlling the size of the gas flow.

As an improvement of the invention, the connecting part on the left side of the rotary seam type nozzle gas pipeline comprises a second gas pipeline, a bearing and a gas inlet pipe, the bearing is embedded and welded on the bearing on the inner wall of the gas pipeline, the inner diameter of the bearing is larger than that of the gas pipeline, the setting can be carried out according to actual requirements, the gas inlet pipe is inserted into the inner wall of the inner ring of the bearing and is coated with sealant to avoid gas leakage, and the inner diameter of the gas inlet pipe is the same as that of the gas pipeline.

As an improvement of the invention, the bearing uses a bearing capable of sealing air, so that the air flow can not leak from the connecting part in the blowing process, and the bearing can do circular motion in 360 degrees, thereby meeting the rotation requirement of the rotary slot type nozzle.

The gear rotating device comprises a gear arranged on the wall surface of the outer wall of the gas transmission pipe, a transmission motor for driving the gear to rotate and a PLC intelligent control system for intelligently controlling the device to rotate, wherein the gear can be selected from a rectangle type, a trapezoid type and the like, the gear is not required to be selected, a group of motor transmission devices are arranged outside the gear, the transmission motor is provided with a gear matched with the gear and used for driving the gas transmission pipe to rotate, the transmission motor is connected with an external voltage, and a group of PLC intelligent control systems are used for intelligently controlling the transmission motor to rotate the gas transmission pipe so as to rotate the slot nozzle, the PLC intelligent control system can control the rotating device to rotate according to a unit rotation angle, the rotation angle can be set according to the number of the slot nozzles, and the requirement that one nozzle of the rotating slot nozzle faces upwards to a working roller forever is met.

As an improvement of the invention, the rotary slot type nozzle assembly comprises even slot type nozzles arranged in the circumferential direction of the gas transmission pipe, the number of the nozzles is more than three, so that the requirement that one nozzle which is positioned at a working position (a position right opposite to a working roller) and is rotated to leave a blockage or is about to be blocked at the previous working position blows to two sides of strip steel is met, secondary pollution of emulsion blockage to the strip steel is avoided, and gas transmission guide holes are arranged in the nozzles for gas transmission.

As an improvement of the invention, a group of blocking parts for preventing the lower nozzle (a nozzle facing the position of the strip steel) from blowing air flow are arranged in the rotary slot type nozzle, the blocking parts comprise blocking balls and a track, the track is positioned in the circumferential direction of an air guide hole of the slot type nozzle, the diameter of the track is larger than that of an air transmission guide hole of the slot type nozzle, a solid steel blocking ball is arranged on the track, and the solid steel blocking ball always rolls on the bottommost air guide hole under the action of gravity in the rotating process to block the air flow output, so that emulsion sprayed by the lower nozzle is prevented from polluting the strip steel.

As an improvement of the invention, the top end of the nozzle is provided with four air flow control devices which can translate along the direction of the air delivery pipe, the control structure can independently do translation motion and is used for independently controlling the size of a gap on the slot type nozzle so as to control the size of air flow, the gap is 2-10 mm, and a good air knife can be formed in the range to blow emulsion on the surface of the working roller or emulsion dropping under condensation action away from the roller.

A method of avoiding clogging of a slot nozzle, the method comprising: when the nozzles at the working positions are blocked or are about to be blocked, the gas conveying pipe is driven to rotate by a motor controlled by a PLC intelligent control system so as to drive the rotary slot type nozzles to rotate, so that the dry clean nozzles in a plurality of groups of slot type nozzles in the circumferential direction of the gas conveying pipe replace the nozzles which are originally blocked or are about to be blocked, the nozzles are continuously used alternately, the blocked nozzles or the nozzles which are about to be blocked are deflected to deviate from the working positions to carry out self hole cleaning towards two sides, meanwhile, the slot type nozzles which are in the working state are still arranged at the working positions, the air flow pressure of a single nozzle is regulated to be below 0.6MPa according to requirements, the air guide holes of the lower nozzle are always sealed by a ball to be in an air flow blocked state, the air flow pressure is set to be the sum of the air flow nozzle pressure according to the actual number of the nozzles and the single nozzle pressure, and the air flow control device is regulated according to meet the air knife states with different requirements.

Compared with the prior art, the invention has the advantages that 1, the technical scheme is designed aiming at the defects of the existing slot type nozzle, so that the slot type nozzle can form a good air knife to sweep the emulsion on the working roller, and the slot type nozzle can be prevented from being blocked in the emulsion spraying and blowing work, so that the sweeping task of the steel rolling emulsion is not stopped all the time, and the economic benefit is improved; 2. the invention can clean the self-cleaning of the blockage of the blocked slot type nozzle while cleaning the nozzle, and does not need to stop the machine for repair, thereby prolonging the running period of the cold-rolled steel strip and further improving the economic benefit; 3. the multiple groups of nozzles are alternately used, so that the service life of the nozzles is longer, and the cost caused by replacing the nozzles is reduced; 4. whole device easy operation, single can be through the work of sweeping of PLC intelligence control system completion emulsion, reduce the cost of labor.

Drawings

FIG. 1 is a schematic view of a rotary slot nozzle according to the present invention.

FIG. 2 is a schematic view of the connecting member and the gear rotating device according to the present invention.

Fig. 3 is a schematic structural view of the air flow control device of the present invention.

Wherein: 1. the gas transmission device comprises a gas transmission pipeline I, a gas transmission guide hole 2, a track 3, a gas transmission guide hole 4, an air flow control device 5, a slot type nozzle 6, a blocking ball 7, a gas transmission pipeline II, a gas transmission pipeline 8, a gear 9, a bearing 10, an air inlet pipe 11, a transmission motor 12, a PLC intelligent control system 13, an air flow control device 14, a track 15 and a blocking ball.

The specific implementation mode is as follows:

for the purpose of enhancing an understanding of the present invention, the present embodiment will be described in detail below with reference to the accompanying drawings.

Example 1: referring to fig. 1-3, the device for avoiding the blockage of the slot nozzle comprises a connecting part arranged on the left side of a rotary slot nozzle gas transmission pipeline and a rotary slot nozzle assembly arranged at the right side end of the gas transmission pipeline, wherein the connecting part is connected with the rotary slot nozzle assembly in a welding mode and the like, a group of gear rotating devices are arranged on the gas transmission pipeline, the gear rotating devices are fixedly arranged outside the gas transmission pipeline, and the gear rotating devices drive the device to rotate through the rotation of gears. The rotary joint type nozzle is characterized in that a set of bearing embedded in the gas conveying pipe is arranged on the connecting part, the bearing is used for being connected with the gas inlet pipe, the rotary joint type nozzle is integrated with the gas conveying pipe, the gas conveying pipe is driven by a gear to rotate, so that the rotary joint type nozzle is capable of rotating 360 degrees, and four air flow control structures capable of translating along the direction of the gas conveying pipe are arranged at the top end of the nozzle and used for controlling the size of the gap on the rotary joint type nozzle and controlling the size of the gas flow. The whole device is made of steel materials, meets the severe environment of a site and has strong damage resistance. The left adapting unit of rotatory seam formula nozzle gas transmission pipeline includes gas transmission pipeline two 7, bearing 9 and intake pipe 10, bearing 9 inlays and welds the bearing at the gas transmission pipe inner wall, and bearing 9 is used for being connected with intake pipe 10, and the bearing internal diameter is greater than the gas transmission pipeline internal diameter, can set for according to actual need, the intake pipe inserts the bearing inner circle inner wall and beats sealed glue, avoids leaking gas, the intake pipe internal diameter the same to the internal diameter with the gas-supply pipe. The bearing 9 is a bearing capable of sealing air, air flow can not leak from the connecting part in the blowing process, the bearing can do circular motion for 360 degrees, and then the rotating requirement of the rotating slot type nozzle is met. The gear rotating device comprises a gear 8 arranged on the wall surface of the outer wall of the gas transmission pipe, a transmission motor 11 for driving the gear to rotate and a PLC intelligent control system 12 for intelligent control device rotation, the gear can select the types of rectangle, trapezoid and the like, the gear is selected without requirements, a group of motor transmission devices are arranged outside the gear, a gear matched with the gear 8 is arranged on the transmission motor and used for driving the gas transmission pipe to rotate, the transmission motor is connected with an external voltage and a group of PLC intelligent control systems 12 and used for intelligently controlling the transmission motor 11 to rotate the gas transmission pipe so as to rotate the slot type nozzle, and the PLC intelligent control system can control the rotating device to rotate according to a unit rotation angle which can be set according to the number of the slot type nozzles, for example: the four nozzles are arranged with a unit rotation angle of 90 degrees, 5 nozzles are arranged with a unit rotation angle of 72 degrees, and the requirement that one nozzle of the rotary slot type nozzle faces upwards to face the working roll is always met. Rotatory slit type nozzle subassembly is including setting up even slit type nozzle 5 on the gas-supply pipe circumferencial direction, and nozzle quantity sets up to more than three, satisfies always to have one to be in the position of working (just to the position of work roller) and the rotatory nozzle that leaves the jam or be about to block up of last working position to blow to belted steel both sides, avoids emulsion plug to bring steel secondary pollution, a plurality of inside gas transmission guide hole gas transmission 3 that sets up of nozzle, rotatory slit type nozzle is inside to be provided with a set of jam parts that prevent down nozzle (just to belted steel position nozzle) jetting air current, the jam part is including blockking up ball (6, 15) and track (2, 14), and track 2 positions are in slit type nozzle air guide hole 3 circumferencial directions, and the track diameter is greater than slit type nozzle gas transmission guide hole diameter, install a solid steel on the track 2 and block up 6 balls, always can roll to stopping up the air current output on bottommost air guide hole under the action of gravity in rotatory process, prevent down nozzle jetting emulsion pollution belted steel. The nozzle top sets up four air current controlling means (4, 13) that can follow the translation of gas transmission pipe direction, translational motion can be done alone to the control structure for thereby the gap size control air flow size on the independent control slot type nozzle, the gap is 2mm ~ 10mm, and this scope can form good air knife blows off the emulsion on work roll surface or the emulsion that condensation effect drips from the roll.

Installation and working processes: referring to fig. 1-3, a device for avoiding the blockage of a slot nozzle comprises a connecting part (consisting of a gas pipeline two 7, a bearing 9 and an air inlet pipe 10) arranged on the left side of a rotary slot nozzle gas pipeline (a gas pipeline 1 and a gas pipeline two 7), a rotary slot nozzle (shown in fig. 1) arranged at the right side end of the gas pipeline (the gas pipeline 1 and the gas pipeline two 7), and a group of gear rotating devices (a gear 8, a transmission motor 11 for driving the gear to rotate and a PLC intelligent control system 12 for the intelligent control device to rotate, wherein the gear rotating devices are arranged on the left side of the gas pipeline as far as possible and are far away from the nozzle and are fixedly arranged outside the gas pipeline (the gas pipeline 1 and the gas pipeline two 7), the gear 8 rotates to drive the gas transmission pipes (a gas transmission pipe I1 and a gas transmission pipe II 7) to rotate, a set of bearing 9 embedded in the gas transmission pipes is arranged on the connecting part (the gas transmission pipe II 7, the bearing 9 and the gas inlet pipe 10), the bearing 9 is used for being connected with the gas inlet pipe 10, the rotary slot type nozzle (figure 1) is integrated with the gas transmission pipes (the gas transmission pipe I1 and the gas transmission pipe II 7), the gear 8 drives the gas transmission pipes (the gas transmission pipe I1 and the gas transmission pipe II 7) to rotate so as to enable the slot type nozzle (figure 1) to complete 360-degree rotation, so the rotary slot type nozzle is called, four gas flow control structures (4 and 13) capable of translating along the direction of the gas transmission pipes are arranged at the top end of the nozzle and are used for controlling the size of gas flow injection gaps on the slot type nozzle (figure 1) so as to control the flow quantity of gas, the whole device is made of steel materials, meets the severe environment of a site and has strong damage resistance.

Adopt above-mentioned device during operation, the work position nozzle 5 is when blockking up or will block up, drive motor 11 can receive PLC intelligence control system 12 control and rotation at once, drive the gas-supply pipe 1, gear 8 on 7, gear 8 is fixed connection with the gas-supply pipe, thereby make the gas-supply pipe rotatory, then the rotary motion is also done to slit nozzle (picture 1), the gas-supply pipe 1, clean nozzle will rotate the former nozzle that blocks up of replacement or will block up in the multiunit slit nozzle on 7 circumferencial directions, do the use by turns constantly, and the former nozzle that blocks up or will block up the nozzle and can turn to skew work position orientation both sides, constantly adjust the gap size through air current controlling means and carry out self-cleaning hole, the work position still has the slit nozzle that is in operating condition simultaneously, reciprocating operation, avoid the nozzle to block up and can not influence the steel rolling continuity. The lower nozzle air guide hole 3 is always sealed by a blocked ball (6, 15) and is in an air flow blocked state, the air flow pressure of a single nozzle is adjusted to be below 0.6MPa according to requirements so as to meet the requirement of sweeping emulsion, the total air flow pressure is set to be the sum of the pressures of the air flow nozzles according to the actual number of the nozzles and the pressure of the single nozzle, and an air flow control device is adjusted according to the requirement so as to meet the air knife states of different requirements. The method improves the removal rate of the emulsion on the surface of the strip steel, eliminates the influence of the emulsion on the surface quality of the strip steel, prolongs the service life of the nozzle while improving the continuity of steel rolling, prolongs the running period of the cold-rolled strip steel, reduces the cost brought by nozzle replacement and can improve the economic benefit.

It should be noted that the above-mentioned embodiments are not intended to limit the scope of the present invention, and all equivalent modifications and substitutions based on the above-mentioned technical solutions are within the scope of the present invention as defined in the claims.

Claims

1. The utility model provides a avoid device of seam formula nozzle jam which characterized in that, is including setting up the rotatory seam formula nozzle assembly at the left adapting unit of rotation type seam formula nozzle gas transmission pipeline and the right side end of gas transmission pipeline, wherein adapting unit uses the welding mode with rotation type seam formula nozzle assembly setting to be connected, set up a set of gear rotary device on the gas transmission pipeline, the gear rotary device installation is fixed in the gas-supply pipe outside, and it is rotatory through the rotatory drive arrangement of gear.

2. The device for avoiding the blockage of the slot nozzle as claimed in claim 1, wherein the connecting component at the left side of the gas pipeline of the rotary slot nozzle comprises a second gas pipeline (7), a bearing (9) and an air inlet pipe (10), the bearing (9) is embedded and welded on the bearing at the inner wall of the gas pipeline, the inner diameter of the bearing is larger than that of the second gas pipeline, the air inlet pipe is inserted into the inner wall of the inner ring of the bearing and is coated with sealant, and the inner diameter of the air inlet pipe is the same as that from the gas pipeline to the inner diameter.

3. An apparatus for preventing clogging of a slot nozzle as set forth in claim 2, wherein said bearing is a gas-tight bearing, and said bearing performs a circular motion of 360 °.

4. The device for avoiding the blockage of the slot nozzle according to claim 1, wherein the gear rotating device comprises a gear (8) arranged on the wall surface of the outer wall of the gas transmission pipeline, a transmission motor (11) for driving the gear to rotate and a PLC intelligent control system (12) for intelligently controlling the transmission motor to rotate the gas transmission pipeline so as to rotate the slot nozzle, a group of motor transmission devices are arranged outside the gear, a gear matched with the gear is arranged on the transmission motor and used for driving the gas transmission pipeline to rotate, the transmission motor is connected with an external voltage and a group of PLC intelligent control systems and used for intelligently controlling the transmission motor to further rotate the gas transmission pipeline so as to rotate the slot nozzle, and the PLC intelligent control systems control the rotating devices to rotate according to a unit rotation angle.

5. The device of claim 2, wherein the rotary slot nozzle assembly comprises a plurality of uniform slot nozzles arranged in the circumferential direction of the gas pipe, the number of the nozzles is more than three, and gas guide holes are arranged in the nozzles for gas transmission.

6. A device for preventing clogging of a slot nozzle as claimed in claim 5, wherein said rotary slot nozzle is internally provided with a set of clogging means for preventing the lower nozzle from blowing air, said clogging means comprising clogging balls (6, 15) and rails (2, 14) positioned circumferentially around the air guide hole of the slot nozzle and having a diameter larger than the diameter of the air guide hole of the slot nozzle, said rails being provided with a solid steel clogging ball.

7. A device for preventing clogging of a slot nozzle as claimed in claim 6, wherein said nozzle tip is provided with four air flow control means (4, 13) which are translatable in the direction of the air delivery tube, said control means being adapted to perform a single translational movement for controlling the size of the slot on the slot nozzle independently of the size of the air flow, the slot being between 2mm and 10mm.

8. Method for avoiding clogging of slot nozzles using the device according to any of claims 1 to 7, characterized in that the method is embodied as follows:

when the nozzles of the working position are blocked or are about to be blocked, the air conveying pipe is driven to rotate by a motor controlled by a PLC intelligent control system so as to drive the rotary slot type nozzles to rotate, so that the clean nozzles in a plurality of groups of slot type nozzles in the circumferential direction of the air conveying pipe replace the nozzles which are originally blocked or are about to be blocked, the nozzles are continuously used alternately, the nozzles which are blocked or are about to be blocked are deflected away from the working position to face two sides for self hole cleaning, meanwhile, the slot type nozzles which are still in the working state are still arranged in the working position, the air flow pressure of a single nozzle is regulated to be below 0.6MPa according to requirements, the air flow guide holes of the lower nozzle are always sealed by a blocking ball to be in an air flow blocked state, the air flow pressure is set to be the sum of the air flow nozzle pressure according to the actual number of the nozzles and the single nozzle pressure, and the air flow control device is regulated to meet the air knife states of different requirements according to requirements.