阅读说明：本技术 一种光亮退火炉入口密封装置 (Bright annealing furnace inlet sealing device ) 是由 甘弘军 王勇 陈磊 于 2021-09-15 设计创作，主要内容包括：本发明公开了一种光亮退火炉入口密封装置,包括密封箱体,通过调节装置安装在密封箱体入口端的密封辊组,所述密封辊组包括上密封辊和下密封辊,所述调节装置包括直线滑轨,上滑块,上轴承座,第一升降机构,下滑块,下轴承座及第二升降机构,所述上密封辊两端穿过端面密封板后插装在上轴承座内,上轴承座通过侧面的上滑块与竖直安装在密封箱体上的直线滑轨配合,所述下密封辊两端穿过端面密封板后插装在下轴承座内,下轴承座通过侧面的下滑块与直线滑轨配合,所述上轴承座连接第一升降机构,下轴承座连接第二升降机构,所述上密封辊和下密封辊的两端通过多层密封垫实现密封,与密封箱体之间相切接触实现密封。本发明的结构从多方面增加了密封性能,也从多方面提升密封辊的使用寿命。(The invention discloses a bright annealing furnace inlet sealing device, which comprises a sealing box body and a sealing roller group arranged at the inlet end of the sealing box body through an adjusting device, wherein the sealing roller group comprises an upper sealing roller and a lower sealing roller, the adjusting device comprises a linear slide rail, an upper slide block, an upper bearing seat, a first lifting mechanism, a lower slide block, a lower bearing seat and a second lifting mechanism, two ends of the upper sealing roller penetrate through an end face sealing plate and are inserted into the upper bearing seat, the upper bearing seat is matched with the linear slide rail vertically arranged on the sealing box body through an upper slide block on the side face, two ends of the lower sealing roller penetrate through the end face sealing plate and are inserted into the lower bearing seat, the lower bearing seat is matched with the linear slide rail through a lower slide block on the side face, the upper bearing seat is connected with the first lifting mechanism, the lower bearing seat is connected with the second lifting mechanism, two ends of the upper sealing roller and the lower sealing roller are sealed through a plurality of layers of sealing gaskets, and the sealing box body is in tangential contact with the sealing box body to realize sealing. The structure of the invention increases the sealing performance from multiple aspects and also prolongs the service life of the sealing roller from multiple aspects.)

1. A bright annealing furnace entrance sealing device is characterized in that: the device comprises a sealing box body arranged at the inlet of an annealing furnace, and a sealing roller group arranged at the inlet end of the sealing box body through an adjusting device, wherein end face sealing plates are arranged on two sides of a steel strip penetrating port on the sealing box body, the sealing roller group comprises an upper sealing roller and a lower sealing roller, the adjusting device comprises a linear slide rail, an upper slide block, an upper bearing seat, a first lifting mechanism, a lower slide block, a lower bearing seat and a second lifting mechanism, the upper sealing roller and the lower sealing roller are symmetrically arranged above and below the steel strip penetrating port in a mirror image mode, the upper sealing roller and the lower sealing roller mutually perform tangential motion to realize the sealing of the steel strip penetrating port, two ends of the upper sealing roller penetrate through the end face sealing plates and are inserted into the upper bearing seat, the upper bearing seat is matched with the linear slide rail vertically arranged on the sealing box body through an upper slide block on the side face, two ends of the lower sealing roller penetrate through the end face sealing plates and are inserted into the lower bearing seat, and the lower bearing seat is matched with the linear slide rail through a lower slide block on the side face, the upper sealing roller is controlled to vertically lift along the linear sliding rail through a first lifting mechanism connected with the upper bearing seat, the lower sealing roller is controlled to vertically lift along the linear sliding rail through a second lifting mechanism connected with the lower bearing seat, sealing is achieved between the upper sealing roller and the end face sealing plate through the multilayer sealing gaskets, and sealing is achieved through tangential contact between the upper sealing roller and the end face sealing plate and the sealing box body.

2. The bright annealing furnace entrance sealing device according to claim 1, wherein: the upper bearing seat and the upper sliding block and the lower bearing seat and the lower sliding block are elastically assembled through elastic assembly parts, each elastic assembly part comprises a linear bearing, a guide rod and a spring, assembling holes which transversely penetrate through the upper end and the lower end of the upper bearing seat and the lower end of the lower bearing seat are formed in the upper end and the lower end of the lower bearing seat, the linear bearings are embedded in the assembling holes, external threads are formed in the end portions of the guide rods, and the guide rods penetrate through the linear bearings after being sleeved with the springs and are screwed into threaded holes of the upper sliding block and the lower sliding block.

3. The bright annealing furnace entrance sealing device according to claim 2, wherein: the two linear bearings are respectively embedded at two ends of the assembly hole, and a spacer bush is arranged between the two linear bearings.

4. The bright annealing furnace entrance sealing device according to claim 1, wherein: the first lifting mechanism is a lifting cylinder and is fixed on the first mounting plate above the end face sealing plate, the second lifting mechanism comprises a screw and a limiting nut, one end of the screw is fixed on the lower end face of the lower bearing seat, the other end of the screw is screwed with the limiting nut and then inserted into the second mounting plate at the lower end of the end face sealing plate, and the upper position and the lower position of the lower bearing seat are adjusted through the limiting nut.

5. The bright annealing furnace entrance sealing device according to claim 1, wherein: and a pressing amount adjusting piece is also arranged between the upper bearing seat and the lower bearing seat.

6. The bright annealing furnace entrance sealing device according to claim 1, wherein: install sealed flashboard subassembly in the seal box, including two sets of baffles, go up the flashboard, first lift cylinder, flashboard and second lift cylinder down, two sets of baffles pass through the spacing fastener of elasticity and install on the backplate of seal box, are located the steel band and wear the export both sides, and have a determining deviation between baffle and the backplate, go up the flashboard and install in the top and the below that the steel band wore the export with lower flashboard with mirror image mode symmetry, wherein go up the flashboard upper end and be connected with the first lift cylinder of installing at the seal box top, the flashboard lower extreme is connected with the second lift cylinder of installing in the seal box bottom down, and about the flashboard both ends inlay between baffle and backplate, flashboard goes up and down about first lift cylinder and the control of second lift cylinder, realizes opening and closure between them.

7. The bright annealing furnace entrance sealing device according to claim 6, wherein: the elastic limiting fastener comprises a limiting sleeve, a bolt and a plurality of disc springs, the limiting sleeve is arranged between the guide plate and the back plate, the bolt penetrates through the disc springs, the guide plate is screwed into the threaded hole of the back plate behind the limiting sleeve.

8. The bright annealing furnace entrance sealing device according to claim 6, wherein: and the first lifting mechanism, the first lifting cylinder and the second lifting cylinder are respectively provided with a position sensor.

9. The bright annealing furnace entrance sealing device according to claim 1, wherein: still be equipped with two nitrogen gas pipes in the seal box, the one end of nitrogen gas pipe is passed the seal box and is sent into nitrogen gas inwards, and a plurality of ventholes have been seted up to axial interval on the lateral wall of nitrogen gas pipe, and two nitrogen gas pipes are installed in the top and the below that the steel band wore the export with mirror image mode symmetry, and the venthole on top nitrogen gas pipe surface is just wearing the export to the steel band, and the venthole on nitrogen gas pipe surface of below is also just wearing the export to the steel band.

10. The bright annealing furnace entrance sealing device according to claim 1, wherein: the multilayer sealing gasket comprises a first tetrafluoroethylene graphite gasket, a second tetrafluoroethylene graphite gasket and a foaming silica gel layer, a center hole for the roller shaft to penetrate is formed in the middle of the multilayer sealing gasket, and an annular groove is formed in the binding surface of the first tetrafluoroethylene graphite gasket and the second tetrafluoroethylene graphite gasket.

Technical Field

The invention relates to the technical field of annealing furnaces, in particular to a bright annealing furnace inlet sealing device.

Background

The bright annealing furnace is one kind of annealing furnace, is used for keeping certain temperature with metal in a certain time, in order to reach better good effect that moves back, often need to let in the high-purity atmosphere of certain content in the annealing furnace, the while is the interior atmosphere's of assurance furnace content and furnace pressure constantly. In the case where a pair of openable and closable sealing rolls are generally used to seal the furnace interior gas, the degree of opening between the sealing rolls and the gap between the sealing rolls and the shell have the most direct influence on the degree of leakage of the furnace interior gas, i.e., the degree of sealing of the annealing furnace.

The sealing device is arranged at the annealing unit and used for reducing the leakage of protective gas in the annealing furnace, ensuring the dew point of gas in the furnace, and preventing external air from entering the furnace to pollute the atmosphere in the furnace and cause potential safety hazards.

However, although the sealing roller device adopted in China has a certain sealing effect on the inlet of the annealing furnace, the sealing roller device still has the following defects:

1) in the production process, because two sealing rollers are driven to open and close through the air cylinder, the horizontal quantity and the rolling reduction of the rollers need to be adjusted frequently during maintenance, time and labor are wasted for production personnel, and the adjustment precision is difficult to control.

2) In the production process, the temperature in the annealing furnace is higher, so that the roll surface of the sealing roll expands after being heated, and the sealing contact surface with the sealing plate is increased, so that the resistance is overlarge when a steel strip is fed, the ohm bamboo shoots of the sealing roll are easily caused, and the service life of the sealing roll is shortened.

3) The gaps at the two ends of the sealing roller are not provided with shields, so that the atmosphere leakage condition in the furnace is serious at the ends of the rollers.

4) Only one group of sealing rollers is arranged, and the atmosphere in the annealing furnace can be exhausted firstly when the rollers are replaced, so that the cost is increased, and the risk coefficient is high.

Disclosure of Invention

The purpose of the invention is as follows: the invention provides a bright annealing furnace inlet sealing device for overcoming the defects of the prior art, wherein a sealing box body is added to serve as a sealing buffer area, the sealing of a steel strip penetration opening is realized by matching with an upper sealing roller and a lower sealing roller, and the relative position of the upper sealing roller and the lower sealing roller is adjusted at high precision by matching a linear slide rail with a lower pressure adjusting piece.

The technical scheme adopted by the invention is as follows: a bright annealing furnace inlet sealing device comprises a sealing box body arranged at an inlet of an annealing furnace, and a sealing roller set arranged at the inlet end of the sealing box body through an adjusting device, wherein end face sealing plates are arranged at two sides of a steel strip penetrating port on the sealing box body, the sealing roller set comprises an upper sealing roller and a lower sealing roller, the adjusting device comprises a linear slide rail, an upper slide block, an upper bearing seat, a first lifting mechanism, a lower slide block, a lower bearing seat and a second lifting mechanism, the upper sealing roller and the lower sealing roller are symmetrically arranged above and below the steel strip penetrating port in a mirror image mode, the upper sealing roller and the lower sealing roller mutually perform tangential motion to realize sealing of the steel strip penetrating port, two ends of the upper sealing roller penetrate through the end face sealing plates and are inserted into the upper bearing seat, the upper bearing seat is matched with the linear slide rail vertically arranged on the sealing box body through an upper slide block on the side face, two ends of the lower sealing roller are inserted into the lower bearing seat after penetrating through the end face sealing plates, the lower bearing seat is matched with the linear slide rail through a lower sliding block on the side face, the upper sealing roller is controlled to vertically lift along the linear slide rail through a first lifting mechanism connected with the upper bearing seat, the lower sealing roller is controlled to vertically lift along the linear slide rail through a second lifting mechanism connected with the lower bearing seat, sealing is achieved between the upper sealing roller and the end face sealing plate through the multilayer sealing gasket, and sealing is achieved through tangential contact between the upper sealing roller and the end face sealing plate and the sealing box body.

Preferably, the upper bearing seat and the upper sliding block and the lower bearing seat and the lower sliding block are elastically assembled through elastic assembly parts, each elastic assembly part comprises a linear bearing, a guide rod and a spring, assembling holes which transversely penetrate through the upper end and the lower end of the upper bearing seat and the lower end of the lower bearing seat are formed in the upper end and the lower end of the lower bearing seat, the linear bearings are embedded in the assembling holes, external threads are formed in the end parts of the guide rods, and the guide rods penetrate through the linear bearings and are screwed into threaded holes of the upper sliding block and the lower sliding block after being sleeved with the springs.

Preferably, the number of the linear bearings is two, the two linear bearings are respectively embedded at two ends of the assembly hole, and a spacer bush is further arranged between the two linear bearings.

Preferably, the first lifting mechanism is a lifting cylinder and is fixed on the first mounting plate above the end face sealing plate, the second lifting mechanism comprises a screw and a limit nut, one end of the screw is fixed on the lower end face of the lower bearing seat, the other end of the screw is screwed with the limit nut and then is inserted into the second mounting plate at the lower end of the end face sealing plate, and the upper position and the lower position of the lower bearing seat are adjusted through the limit nut.

Preferably, a pressing amount adjusting piece is further arranged between the upper bearing seat and the lower bearing seat.

Preferably, install sealed flashboard subassembly in the seal box, including two sets of baffles, go up the flashboard, first lift cylinder, lower flashboard and second lift cylinder, two sets of baffles pass through the spacing fastener of elasticity and install on the backplate of seal box, are located the steel band and wear the export both sides, and have a determining deviation between baffle and the backplate, go up the flashboard and install the top and the below that the steel band wore the export with lower flashboard with mirror image mode symmetry, wherein go up the flashboard upper end and be connected with the first lift cylinder of installing at seal box top, the lower flashboard lower extreme is connected with the second lift cylinder of installing in seal box bottom, and goes up and down the flashboard both ends and inlay between baffle and backplate, and flashboard about first lift cylinder and the control of second lift cylinder go up and down, realizes opening and closure between them.

Preferably, the elastic limiting fastener comprises a limiting sleeve, a bolt and a plurality of disc springs, the limiting sleeve is arranged between the guide plate and the back plate, the bolt penetrates through the disc springs, the guide plate is screwed into the threaded hole of the back plate, and the back of the limiting sleeve is screwed into the threaded hole of the back plate.

Preferably, the first lifting mechanism, the first lifting cylinder and the second lifting cylinder are all provided with position sensors.

Preferably, still be equipped with two nitrogen gas pipes in the seal box, the one end of nitrogen gas pipe is passed the seal box and is sent into nitrogen gas inwards, and a plurality of ventholes have been seted up to axial interval on the lateral wall of nitrogen gas pipe, and two nitrogen gas pipes are installed in the top and the below of steel band through outlet with mirror image mode symmetry, and the venthole on top nitrogen gas pipe surface is just to steel band through outlet, and the venthole on nitrogen gas pipe surface of below is also just to steel band through outlet.

Preferably, the multilayer sealing gasket comprises a first tetrafluoroethylene graphite gasket, a second tetrafluoroethylene graphite gasket and a foaming silica gel layer, a central hole for the roller shaft to pass through is formed in the middle of the multilayer sealing gasket, and an annular groove is formed in the binding surface of the first tetrafluoroethylene graphite gasket and the second tetrafluoroethylene graphite gasket.

Has the advantages that: the inlet sealing device for the bright annealing furnace disclosed by the invention has the following beneficial effects:

the added seal box body is used as a seal buffer area at the front end of the annealing furnace, high-efficiency sealing is realized by combining the upper seal roller and the lower seal roller, and the added seal box can prevent the upper seal roller and the lower seal roller from being directly heated, reduce the loss of the upper seal roller and the lower seal roller and prolong the service life of the upper seal roller and the lower seal roller;

the lifting adjustment of upper and lower sealed roller adopts linear slide rail cooperation slider, realizes straight-up straight-down's regulation, avoids mediating the horizontal shift of room, has improved the regulation precision, and the volume of pushing down regulating part of addding can be injectd the pushing down position of last sealed roller, avoids last sealed roller excessively to push down, leads to two sealed roller contact pressure to increase to improve sealed roller's life.

The end part of the sealing roller adopts a multi-layer sealing gasket with a specific structure, the foaming silica gel layer is utilized to realize the close fit with the end surface of the sealing roller, and two tetrafluoroethylene graphite gaskets are utilized to realize the sealing and the rotation, so that the sealing performance of the two ends of the sealing roller is ensured, and the rotating operation of the sealing roller is not influenced;

the valve plate structure is additionally arranged in the sealing box body and is matched with the sealing roller for use, when the sealing roller needs to be replaced, the overflow of the atmosphere in the annealing furnace and the entrance of external air can be avoided by closing the valve plate, the internal atmosphere does not need to be discharged in advance, the cost is reduced, and meanwhile, the safety performance is improved;

two opposite nitrogen pipes are arranged in the sealing box body, and air outlet holes are formed at a certain angle, so that nitrogen is fed in to form an air curtain at a steel strip passing-through port (namely an annealing furnace inlet), and the overflow of hydrogen and heat in the annealing furnace is prevented, so that the atmosphere content at the sealing roller can be reduced, the sealing performance is further improved, and meanwhile, the influence of expansion with heat and contraction with cold on the sealing layer of the sealing roller is avoided due to the isolated heat;

the bearing seat is elastically assembled with the sliding block, so that the sealing roller and the sealing box body are always in tangent contact, and the sealing box body is prevented from being pressed tightly after the sealing roller expands, so that the service life of the sealing roller is prevented from being influenced.

The structure of the invention increases the sealing performance from multiple aspects and also prolongs the service life of the sealing roller from multiple aspects.

Drawings

FIG. 1 is a front view of the overall structure of an embodiment of the present invention;

FIG. 2 is a side view of the overall structure of an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is a schematic view of the elastic assembly structure in the upper bearing housing according to the embodiment of the present invention;

FIG. 5 is a cross-sectional view of a multilayer gasket in an embodiment of the invention;

FIG. 6 is a structural view of a nitrogen gas pipe in the embodiment of the present invention.

In the figure: 1-a seal box body, 2-a seal roller assembly, 3-a regulating device, 4-a seal gate plate assembly, 5-a multilayer seal gasket, 6-a nitrogen gas pipe, 7-a regulating bolt, 8-an elastic assembly part, 11-a steel strip through hole, 12-a seal panel, 13-an end face seal plate, 14-a first mounting plate, 15-a second mounting plate, 16-an access door, 21-an upper seal roller, 22-a lower seal roller, 31-a linear slide rail, 32-an upper slide block, 33-an upper bearing block, 34-an upper seal roller lifting cylinder, 35-a lower slide block, 36-a lower bearing block, 37-a screw rod, 38-a limit nut, 331-a mounting hole, 41-a guide plate, 42-an upper gate plate, 43-a first lifting cylinder, 44-lower gate plate, 45-second lifting cylinder, 46-elastic limit fastener, 461-limit sleeve, 462-bolt, 463-disc spring, 51-first tetrafluoroethylene graphite gasket, 52-second tetrafluoroethylene graphite gasket, 53-foamed silica gel layer, 54-annular groove, 55-center hole, 61-air outlet hole and 81-linear bearing. 82-spacer, 83-guide rod, 84-spring.

Detailed Description

The technical solution of the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention.

As shown in FIGS. 1 to 3, the bright annealing furnace entrance sealing device disclosed by the invention is installed at an annealing furnace entrance and comprises a sealing box body 1, a sealing roller assembly 2 installed at the entrance end of the sealing box body through an adjusting device 3, and a sealing flashboard assembly 4 installed inside the sealing box body.

The sealing box body is welded at the inlet end of the annealing furnace, a steel strip penetrating port 11 is formed in the back plate of the sealing box body and is just opposite to the inlet of the annealing furnace, a steel strip penetrating port is formed in a sealing panel 12 opposite to the back plate, a sealing panel surface is positioned on two sides of the steel strip penetrating port and is integrally formed with an end face sealing plate 13, a first mounting plate 14 is arranged at the upper end of the end face sealing plate, a second mounting plate 15 is arranged at the lower end of the end face sealing plate, and a kidney-shaped hole for the sealing roller assembly to penetrate is formed in the end face sealing plate.

The sealing roller assembly comprises an upper sealing roller 21 and a lower sealing roller 22, the upper sealing roller and the lower sealing roller are located between two end face sealing plates, the upper sealing roller and the lower sealing roller are symmetrically mounted above and below a steel strip penetrating opening in a mirror image mode, two ends of the upper sealing roller and the lower sealing roller penetrate through holes in the end face sealing plates and are connected with an adjusting device, meanwhile, end face sealing is achieved between the upper sealing roller and the lower sealing roller through a multilayer sealing gasket 5, elastic sealing layers are arranged on the surfaces of the upper sealing roller and the lower sealing roller, the upper sealing roller and the lower sealing roller are made of HEPA rubber, and hardness is xx.

The adjusting device is arranged on a sealing panel on the outer side of an end face sealing plate and used for adjusting the distance between an upper sealing roller and a lower sealing roller so as to match the feeding of steel strips with different thicknesses, and comprises a linear slide rail 31, an upper slide block 32, an upper bearing seat 33, an upper sealing roller lifting cylinder 34, a lower slide block 35 and a lower bearing seat 36, wherein the linear slide rail is vertically arranged on the sealing panel, two ends of the upper sealing roller penetrate through the end face sealing plate and then are inserted into the upper bearing seat, the side face of the upper bearing seat is elastically provided with the upper slide block and is matched with the linear slide rail through the upper slide block, the upper sealing roller lifting cylinder is arranged above a first mounting plate, a telescopic rod of the upper sealing roller lifting cylinder penetrates through the first mounting plate and is connected with the upper bearing seat, the upper sealing roller lifting cylinder controls the upper bearing seat to move up and down along the linear slide rail so as to control the upper sealing roller to be lifted and put down, the upper sealing roller is vertically arranged on the linear slide rail, no offset occurs.

The two ends of the lower sealing roller penetrate through the end face sealing plate and then are inserted into the lower bearing seat, the lower sliding block is elastically assembled on the side face of the lower bearing seat and is matched with the linear slide rail through the lower sliding block, the screw rod 37 is arranged at the bottom of the lower bearing seat, the limit nut 38 is screwed on the screw rod, meanwhile, the screw rod penetrates through the second mounting plate, the vertical position of the lower bearing seat is limited through the limit nut, when the position of the lower bearing seat is required to be adjusted, the lower bearing seat can slide up and down along the linear slide rail only by adjusting the limit nut, the lower bearing seat and the lower sliding block are elastically assembled, so that the lower bearing seat can move transversely, the limit nut is only arranged above the second mounting plate on the screw rod, the locking nut is not arranged below the screw rod, namely, the lower bearing seat is in a movable state, the aperture of the upper hole of the second mounting plate is controlled to be larger than the outer diameter of the screw rod, and the lower bearing seat can move transversely, and because the lower bearing seat and the lower sealing roller have certain dead weight, the lower bearing seat and the lower sealing roller cannot axially move when in use, thereby ensuring the horizontal height of the lower sealing roller and ensuring that the steel strip is horizontally sent into the annealing furnace.

The sealing at the inlet of the sealing box body mainly relates to three positions, the first position is between the upper sealing roller and the lower sealing roller, the second position is between the side face of the upper sealing roller and the side face of the lower sealing roller and the sealing panel, the third position is between the two ends of the upper sealing roller and the two ends of the lower sealing roller and the end face sealing plate, and as long as the sealing performance of the three positions is ensured, the gas in the sealing box body can be prevented from overflowing.

To the sealing of first position, then through the distance between the sealed roller about adjusting, make the elastic sealing layer laminating steel band on two sealed roller surfaces can ensure sealing performance, to the volume of pushing down of last sealed roller, except through sealed roller lift cylinder control, still set up the volume of pushing down regulating part between last lower bearing frame, concrete structure is for twisting the adjusting bolt 7 of dress at the lower bearing frame up end, thereby the volume of pushing down of sealed roller in the control, ensure the contact pressure between the sealed roller from top to bottom, under the prerequisite of guaranteeing sealing performance, avoid the excessive extrusion between the elastic sealing layer, promote the life of sealed roller.

For the sealing at the second position, the upper bearing seat and the upper sliding block are used, the elastic assembly of the lower bearing seat and the lower sliding block controls the sealing roller to be always tangent to the sealing panel, the structure of the specific elastic assembly part 8 is shown in fig. 4, and comprises two groups of linear bearings 81, a spacer 82, a guide rod 83 and a spring 84, the upper end and the lower end of the upper bearing seat are provided with transversely penetrating assembly holes 331, the two groups of linear bearings are embedded at the two ends in the assembly holes, the spacer is embedded in the assembly holes and positioned between the two linear bearings, the tail end of the guide rod is provided with an external thread, the spring is sleeved and then penetrates through the linear bearings and the spacer, the linear bearings and the spacer are screwed into threaded holes in the upper sliding block, the pressing amount of the upper sealing roller and the sealing panel is controlled by the screwing amount, the upper sealing roller and the sealing panel are ensured to be tangent in the initial assembly state, and the spring enables the upper bearing seat (namely the upper sealing roller) to have allowance of transverse movement along with the expansion of the elastic sealing layer, the sealing roller is ensured to be in a tangent state all the time, the service life of the sealing roller is prolonged, and for the lower bearing seat, the elastic assembly structure is consistent with that of the upper bearing seat, so that redundant description is not needed.

The sealing at the third position is realized by using a multi-layer sealing gasket, and the end face sealing needs to realize the sealing and ensure the rotation of the sealing roller, so the multi-layer sealing gasket has a structure as shown in figure 5, and comprises a first tetrafluoroethylene graphite gasket 51, a second tetrafluoroethylene graphite gasket 52 and a foaming silica gel layer 53, a central hole 55 for a roller shaft to pass through is arranged in the middle of the multi-layer sealing gasket, an annular groove 54 is arranged on the joint surface of the first tetrafluoroethylene graphite gasket and the second tetrafluoroethylene graphite gasket, when in use, the foaming silica gel layer is tightly attached to the sealing roller, the first tetrafluoroethylene graphite gasket is tightly attached to the end face sealing plate, the end face sealing of the sealing roller is realized, meanwhile, the two graphite gaskets can relatively rotate, therefore, the sealing rotation of the sealing roller is realized, and the contact area between the two gaskets can be reduced by the arranged annular grooves, so that the friction loss during rotation is reduced.

The sealing gate plate assembly comprises two groups of guide plates 41, an upper gate plate 42, a first lifting cylinder 43, a lower gate plate 44 and a second lifting cylinder 45, the two groups of guide plates are arranged on a back plate through elastic limiting fasteners 46 and are positioned on two sides of a steel strip penetrating port, a certain distance is reserved between the guide plates and the back plate, the surfaces of the guide plates are coated with fireproof layers which can be fireproof blankets or fireproof fiber cloth, the upper gate plate and the lower gate plate are symmetrically arranged above and below the steel strip penetrating port in a mirror image mode, the upper end of the upper gate plate is connected with the first lifting cylinder arranged at the top of the sealing box body, the lower end of the lower gate plate is connected with the second lifting cylinder arranged at the bottom of the sealing box body, guide plates at the two ends of the upper gate plate and the lower gate plate are embedded between the back plate, the first lifting cylinder and the second lifting cylinder control the upper gate plate to lift and lower gate plate to open and close the two, and when the sealing roller is overhauled and replaced, the hydrogen in the annealing furnace can be prevented from overflowing by closing the sealing flashboard. The safety performance is improved, and after the sealing roller is replaced and adjusted, the flashboard is not opened immediately, the flashboard can be opened only after the steel strip penetrates, and the safety is guaranteed.

The spacing fastener of elasticity includes spacing sleeve 461, bolt 462 and a plurality of dish spring 463, and spacing sleeve arranges in between baffle and the backplate, and the bolt passes a plurality of dish springs, and the baffle twists the threaded hole of backplate behind the spacing sleeve, because the cladding of baffle surface has the fire blanket, the volume of screwing up of bolt and baffle can be ensured in the joining of dish spring, ensures the steadiness of baffle.

Still be equipped with two nitrogen gas pipes 6 in the sealing box, nitrogen gas can inwards be sent into to the one end of nitrogen gas pipe passes the sealing box, a plurality of ventholes 61 (as shown in figure 6) have been seted up to axial interval on the lateral wall of nitrogen gas pipe, two nitrogen gas pipes are installed in the top and the below of steel band through hole with mirror image mode symmetry, the venthole on the nitrogen gas pipe surface of top is just to the steel band through hole, the venthole on the nitrogen gas pipe surface of below is also just to the steel band through hole, the nitrogen gas of blowing in like this can form the wind curtain wall, it spills over to block hydrogen in the annealing stove, not only can ensure the pressure in the annealing stove, can also avoid hydrogen to spill over the safety risk that causes, the nitrogen gas that blows to the steel band through hole simultaneously can also block overflowing of high temperature air current in the annealing stove, thereby avoid high temperature air current to the flashboard, deformation such as baffle, influence later stage sealing performance.

In order to ensure that the upper sealing roller, the upper flashboard and the lower flashboard are opened and closed in place, the lifting cylinders, the first lifting cylinder and the second lifting cylinder are respectively provided with a position sensor, the lifting positions are detected, and once the lifting position is monitored, the next step of working procedure is stopped and an alarm is given, so that the use safety is ensured.

Baffle among the flashboard subassembly, upper and lower flashboard installation are all in the seal box, for the convenience of the maintenance in installation and later stage in earlier stage, set up access door 16 on the seal box to be convenient for the maintenance in the installation of inner structure and later stage in earlier stage, in order to ensure sealing performance, access door and seal box's contact department all is equipped with sealed the pad.

Therefore, the scope of the present invention should not be limited to the disclosure of the embodiments, but includes various alternatives and modifications without departing from the scope of the present invention, which is defined by the claims of the present patent application.