Strip steel sag detection device for stainless steel cold rolling annealing furnace

Abstract

The utility model discloses a strip steel sag detection device for a stainless steel cold rolling annealing furnace. The strip steel sag detection device comprises a guide pipe, a telescopic adjusting sleeve, a fastening gland, an angle regulator I, an angle regulator II, a mounting flange, a blowing device, a connector adapter and a radar level meter, the control mode that the draping degree (the relative distance between the strip steel and the furnace top) of the steel strip in the annealing furnace is measured through the radar level meter, and then the tension of the strip steel is controlled is a unique application scene of radar level measurement. Factors restricting and influencing measurement are searched by analyzing the sag measurement process of the strip steel in the stainless steel cold rolling annealing furnace through the radar level meter. The radar level meter has the beneficial effect that the purpose of long-period accurate and stable operation of the radar level meter is finally realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to instrument measurement technical field, concretely relates to a stainless steel cold rolling annealing furnace strip sag detection device. BACKGROUND

[0002] The level measurement technology has experienced the development from mechanical instrument to electronic instrument in structure and from contact type to non-contact type in working mode. In recent years, the development is faster for the TOF (Time of Flight) measurement principle, also known as echo ranging principle. It is a method of non-contact ranging, and the product is very fast in development and application. The working principle diagram is shown in the figure: the radar level gauge antenna installed on the top of the stainless steel cold rolling annealing furnace transmits microwaves into the annealing furnace, when the microwaves propagate to the measured material surface, are reflected on the material surface and returned to the antenna and received. The round trip time of the microwaves is the measure of the wave propagation distance. Figure 1

[0003] The stainless steel cold rolling annealing furnace strip sag measurement is to use the measurement principle of the radar level gauge to continuously monitor the sag of the strip in the furnace on line, to master the accurate position of the strip in the annealing furnace and to provide the main reference for the annealing furnace process control. But in the actual use process, due to the complex environment in the annealing furnace and other factors, the sag measurement may appear periodic measurement value misalignment, jump, false death and zero reset and other phenomena, and further affect the control of the strip tension and the drawing speed. If the measurement value appears smaller than the actual value, it will mislead the post operator to increase the strip tension, and the increase of the tension will make the strip tighter and tighter in the furnace, and finally lead to the production accident of the broken strip. Similarly, the false death and jump of the strip sag measurement will affect the operation of the post personnel, and then the post operator needs to constantly confirm the site, which not only increases the workload and difficulty, but also increases the safety production risk. Some domestic metallurgical enterprises gradually use the non-contact radar ranging technology to measure the stainless steel cold rolling annealing furnace strip sag, but the measurement accuracy is low in the actual application, and the measurement error is mostly about ±1.5%F, and the individual ranging system even exceeds ±2.5% or more when the interference factors are not well handled; the continuous operation stability is also difficult to guarantee, and the artificial maintenance reaches 1 time / week. The main reasons are as follows:

[0004] ​1. The surface hardening of the heat insulation material (ceramic fiber felt) has an effect. In the normal production process, the compressed air purging device ensures the normal working temperature range of the radar level meter. The lower heat insulation material (ceramic fiber felt) blocks the overflow of the heat in the furnace, and because the reflection intensity of the radar wave of the heat insulation material is weaker than that of other metal parts on the top of the furnace, the radar wave can effectively pass through the top of the furnace and directly measure the sag of the strip in the furnace. However, the heat insulation material will deteriorate in the high-temperature environment for a long time, and a large amount of dust and iron filings will adhere to it, which will cause the surface of the heat insulation material (ceramic fiber felt) to harden and deform, and the reflection effect of the radar wave will increase. When the reflection intensity of the echo is greater than the reflection intensity of the radar wave on the surface of the strip in the furnace, the radar level meter will mistake the position of the heat insulation material for the true level, and eventually the level will be false.

[0005] 2. The installation position has an effect. The conventional installation method of the radar level meter is vertical position, and the strip in the furnace is low in the middle and high at both ends. The strip is at the outlet position of the annealing furnace, and the greater the sag of the strip, the smaller the reflection area of the radar wave on the strip, and the smaller the echo intensity. When the reflection intensity of the reflected wave is small to a certain value, the measured value will suddenly change and the measurement will be inaccurate.

[0006] 3. Interference. The measurement channel has structural interference factors such as bending deformation, blockage and narrowness of the hole in the furnace wall. Therefore, the strip sag measurement object of the stainless steel cold rolling annealing furnace has typical complex interference characteristics. Practice has proved that the interference of the measurement path is the main reason for the low measurement accuracy and the large amount of manual maintenance. Practical new type content

[0007] A stainless steel cold rolling annealing furnace strip sag detection device with high measurement accuracy, strong anti-interference ability and small maintenance amount is provided. To this end, the following technical solutions are adopted:

[0008] A stainless steel cold rolling annealing furnace strip sag detection device, comprising a guide pipe, a telescopic adjusting sleeve, a fastening gland, an angle adjuster I, an angle adjuster II, a mounting flange, a purger, a connector adapter and a radar level meter.

[0009] The purger is fixed on the hearth of the annealing furnace, and the top of the purger is connected with the mounting flange. The mounting flange and the purger are fixed by fixed bolts I. The angle adjuster II is fixedly connected with the mounting flange in the middle through a rotating adjusting bolt II. The bottom of the angle adjuster II is flat and the top is inclined. The angle adjuster I is fixedly connected with the top center of the angle adjuster II. The bottom of the angle adjuster I is flat and the top is inclined. The telescopic adjusting sleeve is fixedly connected with the top center of the angle adjuster I, and the telescopic adjusting sleeve is perpendicular to the top surface of the angle adjuster I.

[0010] The connector adapter is threadedly connected to the head end of the guide pipe, and the radar level meter is installed in the connector adapter.

[0011] Further, the purger is provided with a side opening, which is a gas inlet connected with one end of a purge gas inlet, the other end of the purge gas inlet is connected with one end of a shut-off valve, the other end of the shut-off valve is connected with one end of a filter pressure reducing valve, the other end of the filter pressure reducing valve is connected with a compressed air source;

[0012] The other side of the purger is provided with an opening, which is a purge gas outlet, the purge gas outlet is a 5mm diameter hole formed at the bottom end of the side wall of the purger at an angle of 60° upward.

[0013] Further, it further comprises a waveguide heat insulation plate, which is installed between the purger and the annealing furnace, and is fixed by fixed bolts II.

[0014] Further, the annealing furnace is provided with annealing furnace conveying rollers on both sides of the inside of the annealing furnace, and the annealing furnace conveying rollers convey the strip steel on the upper part.

[0015] A stainless steel cold rolling annealing furnace strip steel sag detection device, including a conduit, the conduit is a DN15 stainless steel pipe, the length is 1500mm, the conduit passes through the telescopic adjusting sleeve and is fastened by the fastening bolt, the fastening nut and the sleeve fastening gland; the telescopic adjusting sleeve 2 is a DN32 stainless steel pipe, the length is 70mm, the telescopic adjusting sleeve is welded and connected with the angle adjuster I at an angle of 90°; the fastening bolt is 4 M5 type bolts, the bolt length is 16mm; 4 Φ6 holes are uniformly opened in the middle position of the telescopic adjusting sleeve, the hole outer wall is welded with the fastening nut, the fastening nut is 4 M5 nuts, the fastening bolt passes through the fastening nut in the form of screwing, and the fixing of the conduit is realized; the function of the conduit is to adjust the insertion depth of the radar level meter. The telescopic adjusting sleeve helps the conduit to realize free telescoping in its interior. The main function of the fastening bolt is to fix the conduit, the fastening bolt passes through the telescopic adjusting sleeve in the form of threaded connection, and the fixing of the conduit can be realized by tightening the fastening bolt, so that the conduit will not slide up and down; the main function of the sleeve fastening gland is to form a fastening sealing surface with the telescopic adjusting sleeve, which can strengthen the fixation of the conduit on one hand, and prevent the compressed air in the purger from overflowing on the other hand, and plays a sealing role.

[0016] The angle adjuster I comprises a lower flange I, a rotating guide rail I, a rotating adjusting bolt I, an indicating needle I, a rotating handle I, a top plate and a pipe wall I. The lower flange I is a concentric circular ring with an outer diameter of 150 mm and an inner diameter of 114 mm; the lower flange I is internally provided with a circular arc-shaped rotating guide rail I, the rotating guide rail I has a width of 6.2 mm and is arranged at the center position of the circular ring of the lower flange I; the rotating adjusting bolt I is three M6 bolts with a length of 30 mm, and is matched with a 12*10*3 mm cuboid pressing block; the lower flange I is connected with the angle adjuster II by the rotating adjusting bolt I penetrating through the rotating guide rail I; the indicating needle I is connected with the pipe wall I at an angle of 70° by welding; and the rotating handle I is connected with the pipe wall I at an angle of 90° by welding. The top plate is connected with the top of the pipe wall I at an angle of 103°30' by welding, and is an oval with a long side diameter of 117.24 mm and a short side diameter of 114 mm; a circular hole with a diameter of 30 mm is arranged at the center of the oval of the top plate, and the top plate is welded with the telescopic adjusting sleeve at an angle of 90°; the pipe wall I is cut at an angle of 13°30' by cutting the top of a DN100 pipe, and has an outer diameter of 114 mm and an inner diameter of 106 mm; the top inclined surface of the pipe wall I is welded with the top plate at an angle of 103°30', and the bottom of the pipe wall I is welded with the lower flange I at the center. The cutting method of the pipe wall I is as follows: the pipe wall I is vertically placed on a horizontal plane, and the pipe wall I is viewed horizontally, so that a rectangle with a length of 114 mm is obtained; then, 20 mm is measured vertically on the left side of the 114 mm long side of the rectangle and marked, and 47.36 mm is measured vertically on the right side of the 114 mm long side of the rectangle and marked; then, the 20 mm and 47.36 mm mark points are connected by a tape measure, and a marking pen is used to draw a line on the pipe wall I along the outer edge of the tape measure; the front and back surfaces of the pipe wall I are marked by the same method; and then, the pipe wall I is cut along the mark line, so that the cut surface of the pipe wall I and the horizontal plane form an included angle of 13°30'.

[0017] The angle adjuster II comprises a lower flange II, a rotating guide rail II, a rotating adjusting bolt II, a rotating handle II, a scale I, a top flange, a rotating adjusting screw hole II, a top flange inner hole II and a pipe wall II. The lower flange II is a concentric ring with an outer diameter of 280 mm and an inner diameter of 219 mm; the lower flange II is internally provided with a circular arc-shaped rotating guide rail II, the rotating guide rail II has a width of 6.2 mm, and the opening position is the center position of the circular ring of the lower flange II; the rotating adjusting bolt II is three M6 bolts with a length of 30 mm, and is matched with a 12*10*3 mm cuboid pressing block; the lower flange II is connected with the mounting flange through the rotating adjusting bolt II penetrating the rotating guide rail II; the rotating handle II is connected with the pipe wall II at an angle of 90° in a welding manner; the scale I equally divides the outer edge of the top flange into 72 parts, and each scale is equal to 0.75°. The angle determination method of the scale I is as follows: the shortest side of the pipe wall II welded with the top flange is taken as the 0° value, the longest side of the pipe wall II welded with the top flange is taken as the 27° value, the outer edge of the top flange is equally divided into 72 parts, each scale is equal to 0.75°, and the scale lines are sequentially marked. The top flange is connected with the pipe wall II at an angle of 103°30' in a welding manner, the top flange is an ellipse with a long side diameter of 225.2 mm and a short side diameter of 219 mm; the rotating adjusting screw hole II is internally processed with M6 screw threads, a total of 6, and is connected with the rotating adjusting bolt I penetrating the rotating guide rail I of the angle adjuster I; the position selection method of the rotating adjusting screw hole II is as follows: the distance from the guide rail center point of the angle adjuster I to the center is taken as the radius, a circle is drawn with the same center as the top flange, and the circle is symmetrically divided into six parts, so that the intersection point of each part is the dot of the rotating adjusting screw hole II. The top flange inner hole II with a diameter of 100 mm is drawn with the same center as the top flange; the pipe wall II is a DN200 pipeline, the outer diameter of the pipe wall I is 219 mm, the inner diameter is 206.4 mm, the pipe wall II is cut at an angle of 13°30', and the manufacturing method is the same as that of the pipe wall I; the top inclined surface of the pipe wall II is welded with the top flange at an angle of 103°30', and the bottom of the pipe wall II is horizontally welded with the lower flange II with the same center.

[0018] The mounting flange comprises a mounting flange outer diameter, a fixed bolt I, a scale II, a rotating adjusting screw hole II and a mounting flange inner hole. The mounting flange is a concentric ring with an outer diameter of 380 mm and an inner diameter of 200 mm; the mounting flange outer diameter is 380 mm; the fixed bolt I is four M8 bolts with a length of 50 mm, and the fixed bolt I connects the mounting flange with the purger;

[0019] The scale II is a circle with the same center as the mounting flange and a diameter of 320 mm, the outer edge of the scale II is equally divided into 72 parts, and each scale is equal to 5°, and the specific function is that the specific rotation angle of the radar level meter can be known by reading the scale value of the scale II; the rotating adjustment screw hole II is internally processed with M6 type screw thread, a total of 6 places, the rotating adjustment screw hole II is connected with the rotating adjustment bolt II passing through the angle adjuster II rotating guide rail II, and the position selection method of the rotating adjustment screw hole II is consistent with the rotating adjustment screw hole II method; the mounting flange inner hole with a diameter of 200 mm is opened with the same center as the mounting flange.

[0020] The sight module includes a guide pipe, a telescopic adjusting sleeve, an angle adjuster I, an angle adjuster II, a mounting flange, a connector adapter and a radar level meter. The guide pipe is fixed after passing through the telescopic adjusting sleeve; the telescopic adjusting sleeve is welded with the angle adjuster I at a 90° angle with the same center; the angle adjuster I is connected with the angle adjuster II through three M6 type bolts; the angle adjuster II is connected with the mounting flange through three M6 type bolts; the connector adapter is connected with the lower end of the guide pipe through the thread; and the radar level meter is installed in the connector adapter. The specific function of the guide pipe is to realize the adjustment of the insertion depth of the radar level meter through telescopic adjustment. The specific function of the telescopic adjusting sleeve is to lock the guide pipe so that it cannot move up and down at will. The specific function of the angle adjuster I is to rotate it using the rotating handle I, and the angle value of the radar level meter moving in the vertical direction is confirmed through the scale value pointed by the indicating needle and the scale I, so as to realize the angle movement and angle value determination in the vertical direction. The specific function of the angle adjuster II is to rotate it using the rotating handle II, and the angle value of the radar level meter moving in the horizontal direction is confirmed through the scale value pointed by the indicating needle and the scale II, so as to realize the angle movement and angle value determination in the horizontal direction.

[0021] The purger comprises a purging gas inlet, a cut-off valve, a filter pressure reducing valve, a compressed air source, a waveguide heat insulation plate, a purging gas outlet and a fixing bolt II. One end of the purging gas inlet is connected with the purger, the other end of the purging gas inlet is connected with one end of the cut-off valve, the other end of the cut-off valve is connected with one end of the filter pressure reducing valve, the other end of the filter pressure reducing valve is connected with the compressed air source; the waveguide heat insulation plate is installed between the purger and the annealing furnace, and the waveguide heat insulation plate is made of quartz fiber; four symmetrical purging gas outlets are formed in the side wall of the purger, and the opening diameter of the purging gas outlet is 10mm; the fixing bolt II is an M10 bolt with a length of 60mm, and the fixing bolt II connects the purger with the annealing furnace through bolting; the filter pressure reducing valve filters impurities in the compressed air to ensure the quality of the compressed air source; the waveguide heat insulation plate insulates the radiant heat of the annealing furnace and ensures that the radar wave of the radar level meter can penetrate the waveguide heat insulation plate to measure the strip steel; the purging gas outlet adopts an internal tangent circular nozzle with a diameter of 5mm, and the nozzle is designed to be inclined upward by 60 degrees; the purging gas outlet discharges the compressed air after heat exchange in the purger to ensure that the temperature in the purger is below 40 DEG C, so that the radar level meter can work normally; the filter pressure reducing valve has a filtering precision of 3um and can filter particles larger than 3um in the compressed air; the pressure regulating range is 0.05-0.5MPa, the inlet pressure of the air source is 0.7MPa, and the working pressure of the output end is 0.4MPa.

[0022] The annealing furnace is fixed with the purger through the fixing bolt II, the annealing furnace is internally provided with an annealing furnace conveying roller, and the strip steel is placed on the upper portion of the annealing furnace conveying roller.

[0023] The utility model discloses the beneficial effects are:

[0024] 1. The utility model discloses a stainless steel cold rolling annealing furnace strip steel sag detection object's quantitative analysis and evaluation, implement the approach of optimization system integration, realize stainless steel cold rolling annealing furnace strip steel sag measurement accuracy ±1.0%FS, repeatability ±0.5%FS, artificial maintenance amount is less than or equal to 2 times / year target.

[0025] 2. The utility model discloses adopt the sighting module and install the radar level meter to the inclination angle, can effectively reduce the interference influence that strip steel sag change causes to material level measurement, enhanced the applicability of radar level meter to the change of measurement object.

[0026] 3. The utility model discloses have extensive popularization and application value and productization extension value. If adopt technical method + modularization instrument, device, form market product, can bring the remarkable economic benefit for enterprise. DRAWINGS

[0027] Figure 1 Structure diagram of the utility model with an inclination angle of 27°;

[0028] Figure 2 Structure diagram of the utility model with an inclination angle of 0°;

[0029] Figure 3 Front view and plan view of the utility model telescopic device;

[0030] Figure 4 Front view and plan view of the utility model angle adjuster I;

[0031] Figure 5 Front view and plan view of the utility model angle adjuster II;

[0032] Figure 6 Front view and plan view of the utility model mounting flange;

[0033] Figure 7 Front view and plan view of the utility model sight module;

[0034] Figure 8 Structure diagram of the utility model purger;

[0035] In the figure: conduit 1, telescopic adjustment sleeve 2, fastening bolt 201, fastening nut 202, fastening gland 203, angle adjuster I 3, lower flange I 301, rotating guide rail I 302, rotating adjustment bolt I 303, indicating needle 304, rotating handle I 305, top plate 306 and pipe wall I 307, angle adjuster II 4, lower flange II 401, rotating guide rail II 402, rotating adjustment bolt II 403, rotating handle II 404, scale I 405, top flange 406, rotating adjustment screw hole II 407, top flange inner hole II 408 and pipe wall II 409, mounting flange 5, mounting flange outer diameter 501, fixing bolt I 502, scale II 503, rotating adjustment screw hole II 504, mounting flange inner hole 505, purger 6, connecting head adapter 7, radar level gauge 8, purging gas inlet 9, shut-off valve 10, filtering pressure reducing valve 11, compressed air source 12, waveguide heat insulation plate 13, annealing furnace conveying roller 14, strip steel 15, annealing furnace hearth 16, sight module 17, purging gas outlet 18, fixing bolt II 19. DETAILED DESCRIPTION

[0036] The utility model will be further described below in combination with the drawings and specific embodiments:

[0037] Embodiment 1

[0038] A stainless steel cold rolling annealing furnace strip sag detection device. Including conduit 1, telescopic adjusting sleeve 2, fastening bolt 201, fastening nut 202, fastening gland 203, angle adjuster I 3, angle adjuster II 4, mounting flange 5, connector adapter 7, radar level gauge 8.

[0039] The conduit 1 passes through the telescopic adjusting sleeve 2, the angle adjuster I 3, the angle adjuster II 4 and the mounting flange 5 and extends into the purger 6. The telescopic adjusting sleeve 2 includes the fastening bolt 201, the fastening nut 202 and the fastening gland 203, and is welded to the angle adjuster I 3 at an angle of 90°; the fastening bolt 201 is connected to the fastening nut 202 by screwing, four fastening nuts 202 are welded to the outer wall of the telescopic adjusting sleeve 2, and the fastening gland 203 is connected to the telescopic adjusting sleeve 2 by screwing.

[0040] The connector adapter 7 is connected to the conduit 1 in a threaded manner, and the radar level gauge 8 is installed in the connector adapter 7.

[0041] The sight module 17 includes the conduit 1, the telescopic adjusting sleeve 2, the angle adjuster I 3, the angle adjuster II 4, the mounting flange 5, the connector adapter 7 and the radar level gauge 8.

[0042] Method for use:

[0043] The insertion depth of the sight module 17 is adjusted by adjusting the conduit 1 and the telescopic adjusting sleeve 2 to change the insertion depth of the radar level gauge 8. First, loosen the fastening gland 203 and the fastening nut 202, then adjust the insertion or withdrawal of the conduit 1, confirm the insertion depth, then tighten the fastening nut 202 and the fastening gland 203, and then measure the length of the exposed part of the conduit 1 to calculate the insertion depth value in reverse.

[0044] Example 2

[0045] A stainless steel cold rolling annealing furnace strip sag detection device. Including conduit 1, telescopic adjusting sleeve 2, angle adjuster I 3, lower flange I 301, rotating guide rail I 302, rotating adjusting bolt I 303, indicating needle 304, rotating handle I 305, top plate 306 and pipe wall I 307, angle adjuster II 4, scale I 405, top flange 406, pipe wall II 409, mounting flange 5, purger 6, connector adapter 7, radar level gauge 8.

[0046] The conduit 1 passes through the telescopic adjusting sleeve 2, the angle adjuster I 3, the angle adjuster II 4 and the mounting flange 5 and extends into the purger 6. The telescopic adjusting sleeve 2 is welded to the angle adjuster I 3 at an angle of 90°.

[0047] The angle adjuster I 3 comprises a lower flange I 301, a rotating guide rail I 302, a rotating adjusting bolt I 303, an indicating needle 304, a rotating handle I 305, a top plate 306 and a pipe wall I 307. The lower flange I 301 is perpendicularly welded with the bottom of the pipe wall I 307 at an angle of 90°, the rotating guide rail I 302 is a semicircular ring guide rail processed inside the lower flange I 301, the rotating adjusting bolt I 303 is bolted with the angle adjuster II 4 through the rotating guide rail I 302, the indicating needle 304 is welded with the long side of the pipe wall I 307 at an angle of 70°, the rotating handle I 305 is welded with the pipe wall I 307 at an angle of 90°, the top plate 306 is welded with the top of the pipe wall I 307 at an angle of 103°30', and the pipe wall I 307 is welded with the lower flange I 301, the indicating needle 304, the rotating handle I 305 and the top plate 306.

[0048] The scale I 405 in the angle adjuster II 4 is equally divided into 72 parts along the outer edge of the top flange 406, and each scale is equal to 0.75°. The top flange 406 is welded with the top of the pipe wall II 409 at an angle of 103°30'.

[0049] The connecting head adapter 7 is connected with the guide pipe 1 in the form of screw thread, and the radar level meter 8 is installed inside the connecting head adapter 7.

[0050] The sight module 17 comprises the guide pipe 1, the telescopic adjusting sleeve 2, the angle adjuster I 3, the angle adjuster II 4, the mounting flange 5, the connecting head adapter 7 and the radar level meter 8.

[0051] Method for use:

[0052] Method for adjusting the inclination angle of the sight module 17 from 0 to 27°. First, loosen the rotating adjusting bolt I 303, then rotate the angle adjuster I 3 along the rotating guide rail I 302 clockwise or counterclockwise through the rotating handle I 305, observe the value of the scale I 405 pointed by the indicating needle 304, determine the adjustment angle of the angle adjuster I 3 according to the reading of the scale I 405, and tighten the rotating adjusting bolt I 303 after adjusting the angle adjuster I 3 to the target scale. At this time, the value of the scale I 405 pointed by the indicating needle 304 is the inclination angle value of the sight module 17.

[0053] Example 3

[0054] A stainless steel cold-rolled annealing furnace strip sag detection device. It comprises a guide pipe 1, a telescopic adjusting sleeve 2, an angle adjuster I 3, an indicating needle 304, an angle adjuster II 4, a lower flange II 401, a rotating guide rail II 402, a rotating adjusting bolt II 403, a rotating handle II 404, a top flange 406, a rotating adjusting hole II 407, a top flange inner hole II 408, a pipe wall II 409, a mounting flange 5, a scale II 503, a connecting head adapter 7, a radar level meter 8 and a sight module 17.

[0055] The conduit 1 extends into the purger 6 through the telescopic adjusting sleeve 2, the angle adjuster I 3, the angle adjuster II 4 and the mounting flange 5. The telescopic adjusting sleeve 2 is welded to the angle adjuster I 3 at a 90° angle.

[0056] The indicating needle 304 of the angle adjuster I 3 is welded to the pipe wall I 307 at a 70° angle.

[0057] The angle adjuster II 4 comprises a lower flange II 401, a rotating guide rail II 402, a rotating adjusting bolt II 403, a rotating handle II 404, a scale I 405, a top flange 406, a rotating adjusting screw hole II 407, a top flange inner hole II 408 and a pipe wall II 409. The lower flange II 401 is welded to the bottom of the pipe wall I 307 and the pipe wall II 409 at a 90° angle, the rotating guide rail II 402 is a semicircular ring guide rail processed inside the lower flange II 401, the rotating adjusting bolt II 403 is bolted to the mounting flange 5 through the rotating guide rail II 402, the rotating handle II 404 is welded to the pipe wall II 409 at a 90° angle, the top flange 406 is welded to the top of the pipe wall II 409 at a 103°30' angle, the rotating adjusting screw hole II 407 is a fastening screw hole processed inside the top flange 406, the top flange inner hole II 408 is a connecting hole processed inside the top flange 406, and the pipe wall II 409 is welded to the lower flange II 401, the rotating handle II 404 and the top flange 406.

[0058] The scale II 503 of the mounting flange 5 is equally divided into 72 parts, and each scale is equal to 5°.

[0059] The connection head adapter 7 is connected to the conduit 1 in a threaded manner, and the radar level gauge 8 is installed inside the connection head adapter 7.

[0060] The sight module 17 comprises the conduit 1, the telescopic adjusting sleeve 2, the angle adjuster I 3, the angle adjuster II 4, the mounting flange 5, the connection head adapter 7 and the radar level gauge 8.

[0061] Method for use:

[0062] The sight module 17 can be adjusted at a rotation angle of 360°, and the adjusting method is the same as that of the inclination angle value adjustment of the sight module 17 in Embodiment 2. First, loosen the rotating adjusting bolt II 403, rotate the angle adjuster II 4 clockwise or counterclockwise along the rotating guide rail II 402 through the rotating handle II 404, observe the value of the scale II 503 pointed by the indicating needle 304, determine the rotation angle of the angle adjuster II 4 according to the reading of the scale II 503, and after adjusting the angle adjuster II 4 to the target scale, tighten the rotating adjusting bolt II 403. At this time, the value of the scale II 503 pointed by the indicating needle 304 is the rotation angle value of the sight module 17.

[0063] Embodiment 4

[0064] A stainless steel cold rolling annealing furnace strip sag detection device. Including mounting flange 5, fixed bolt I 502, purger 6, purge gas inlet 9, cut-off valve 10, filter pressure reducing valve 11, compressed air source 12, waveguide heat insulation plate 13, purge gas outlet 18, fixed bolt II 19.

[0065] The mounting flange 5 and the purger 6 are connected by the fixed bolt I 502.

[0066] The purger 6 includes a purge gas inlet 9, a cut-off valve 10, a filter pressure reducing valve 11, a compressed air source 12, a waveguide heat insulation plate 13, a purge gas outlet 18 and a fixed bolt II 19. One end of the purge gas inlet 9 is connected with the purger 6, the other end of the purge gas inlet 9 is connected with one end of the cut-off valve 10, the other end of the cut-off valve 10 is connected with one end of the filter pressure reducing valve 11, the other end of the filter pressure reducing valve 11 is connected with the compressed air source 12; the waveguide heat insulation plate 13 is connected with the annealing furnace chamber 16 through the fixed bolt II 19, the purge gas outlet 18 is a gas exhaust hole with a diameter of 5mm opened in the side wall of the purger 6, and the fixed bolt II 19 connects the purger 6, the waveguide heat insulation plate 13 and the annealing furnace chamber 16.

[0067] Method for use:

[0068] Method for cleaning and cooling the purger 6. Cold compressed air enters the purger 6 through the filter pressure reducing valve 11, the cut-off valve 10 and the purge gas inlet 9, replaces the hot air generated by the radiation heat of the annealing furnace chamber 16 inside the purger 6, and then discharges the hot air out of the purger 6 through the purge gas outlet 18, so as to achieve the purpose of cooling. By installing the waveguide heat insulation plate 13, the dust inside the annealing furnace chamber 16 can be effectively prevented from entering the purger 6, and at the same time, because the purger 6 is purged by cold compressed air, the surface temperature of the waveguide heat insulation plate 13 connected to the side of the purger 6 can be effectively reduced, so as to further reduce the temperature inside the purger 6.

Claims

1. A stainless steel cold-rolled annealing furnace strip sag detection device, characterized by, The device comprises a conduit (1), a telescopic adjusting sleeve (2), a fastening gland (203), an angle adjuster I (3), an angle adjuster II (4), a mounting flange (5), a purger (6), a connector adapter (7) and a radar level gauge (8). The purger (6) is fixed on the annealing furnace chamber (16), the top of the purger (6) is connected with the mounting flange (5), the mounting flange (5) and the purger (6) are fixed by the fixed bolt I (502); the middle of the mounting flange (5) is fixedly connected with the angle adjuster II (4) through the rotary adjusting bolt II (403), the bottom of the angle adjuster II (4) is a plane and the top is an inclined plane, the top center of the angle adjuster II (4) is fixed with the angle adjuster I (3), the bottom of the angle adjuster I (3) is a plane and the top is an inclined plane; the top center of the angle adjuster I (3) is fixed with the telescopic adjusting sleeve (2), the telescopic adjusting sleeve (2) is perpendicular to the top surface of the angle adjuster I (3). The connector adapter (7) is screw-connected to the head end of the conduit (1), and the radar level gauge (8) is installed in the connector adapter (7).

2. The apparatus for detecting the sag of a strip steel in a stainless steel cold-rolling annealing furnace according to claim 1, wherein The purger (6) is provided with a hole on one side, which is a gas inlet, the gas inlet is connected with one end of a purging gas inlet (9), the other end of the purging gas inlet (9) is connected with one end of a shut-off valve (10), the other end of the shut-off valve (10) is connected with one end of a filter pressure reducing valve (11), and the other end of the filter pressure reducing valve (11) is connected with a compressed air source (12). The other side of the purger (6) is provided with a hole, which is a purging gas outlet (18), the purging gas outlet (18) is a hole with a diameter of 5mm, which is upwardly opened at the bottom end of the side wall of the purger (6) at an angle of 60°.

3. The apparatus according to claim 2, wherein A waveguide heat insulation plate (13) is further provided, which is installed between the purger (6) and the annealing furnace chamber (16) and is fixed by a fixed bolt II (19).

4. The apparatus according to claim 3, wherein Annealing furnace conveying rollers (14) are installed on both sides of the inside of the annealing furnace chamber (16), and the annealing furnace conveying rollers (14) are provided with a strip steel (15) on the upper part.

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