Gas cooling device suitable for zinc pot outlet strip steel thermodetector

Abstract

The utility model discloses a gas cooling device suitable for a zinc pot outlet strip steel thermodetector, which comprises an air cooling protection box arranged on a fixed support through a rotary support, an air purging mechanism arranged on the air cooling protection box, an infrared thermodetector arranged in the air cooling protection box, and a vortex cooling mechanism arranged on the air cooling protection box. According to the infrared thermometer cooling device, the cooling mode that the air cooling protection box, the air blowing mechanism and the vortex cooling mechanism are combined is adopted, the air cooling protection box adopts the design of the isolation refrigeration bin, and the situation that the cold air produced by the vortex cooler is too much lost is avoided; and the cold air loss speed is slowed down, the working environment temperature of the infrared thermometer is reduced, the safety risk hidden danger of service life shortening and potential abnormal temperature measurement caused by over-temperature of the infrared thermometer is avoided, and the potential safety risk hidden danger of explosion caused by the fact that cooling water leaks into a zinc pot and violently reacts with zinc liquid in a traditional water cooling mode is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to non - contact infrared temperature measurement technical field, more particularly in a gas cooling device suitable for zinc pot outlet strip gauge. BACKGROUND

[0002] Cold rolled hot galvanized strip has been widely applied in the industry of building, aviation, automobile and household appliance because of its many advantages such as strong corrosion resistance, good mechanical property, excellent surface quality, high dimensional accuracy and low production cost, and hot galvanizing is an important means for steel surface protection at home and abroad, and the hot dip galvanizing process is to immerse the annealed strip into molten zinc (or zinc alloy) to form a pure zinc and zinc alloy layer on the surface of the strip, and in the hot dip galvanizing process, the cooling rate control of the strip after leaving the zinc pot is one of the key factors to ensure the quality of the galvanized product, and after the strip leaves the zinc pot, the surface temperature of the strip is generally about 460 DEG C, and the cooling rate needs to be reasonably controlled in a short time at the uplink cooling (air cooling), tower top turning roller and downlink cooling (water cooling) positions to ensure that the product performance meets the expected requirements and eliminates the defects of top roller scratches.

[0003] Among them, the temperature control in the uplink cooling process is the most critical, which mainly shows as follows:

[0004] 1) In the uplink cooling process after the strip leaves the zinc pot, the strip temperature needs to be reduced to below 150 DEG C before reaching the tower top roller to ensure that the product performance is qualified, so as to avoid the quality defects caused by the incomplete dryness of the zinc layer on the surface of the strip and the adhesion to the tower top roller, which affects the surface quality of the product;

[0005] 2) If the cooling rate is too fast after the strip leaves the zinc pot, the temperature will drop sharply, which will cause the deformation of the strip due to thermal expansion and cold contraction, such as C warping, etc.

[0006] 3) If the cooling rate is too slow after the strip leaves the zinc pot, the high-temperature workpiece and the surface zinc layer will be excessively oxidized and eroded, which will affect the gloss and color difference of the product, and also will cause the dissolution of the subsequent passivation process to ensure the quality of the product.

[0007] Therefore, the temperature control of post-plating cooling is very important, and the conventional control means is to monitor the surface temperature of the strip at the fixed fan outlet, the movable fan outlet and the tower top roller position in the uplink cooling process, so as to adjust the strip speed and the fan power to control the cooling rate and ensure the quality of the product, but in the temperature control process of uplink cooling, the temperature of the strip is as high as more than 400 DEG C, the hot air environment temperature around the temperature measuring point instrument is close to 200 DEG C, and each temperature measuring point is directly above the high-temperature zinc pot solution, in order to prevent the potential safety risk of explosion caused by the leakage of cooling water of the temperature measuring instrument into the zinc pot and the violent reaction with the zinc liquid.

[0008] The current temperature measuring instrument cooling design all adopts the method of passing into the vortex cooler inside the conventional water cooling jacket to make cold gas to carry out instrument cooling, but due to the small spiral pipe space inside the conventional water cooling jacket, the low-temperature compressed cold gas made by the vortex cooler does not stay in the pipe fully, but is discharged into the cooling jacket cavity, and the air cooling effect is only one tenth of the conventional water cooling, resulting in that most of the current temperature measuring instruments have a high temperature of 80 degrees Celsius (the maximum ambient temperature of the conventional temperature measuring instrument is 65 DEG C), the temperature of the temperature measuring instrument is too high, greatly reduces the service life of the temperature measuring instrument, and there is a potential risk of abnormal temperature measurement affecting the quality of finished products, therefore, we provide a gas cooling device suitable for zinc pot outlet strip steel temperature measuring instrument. Content of the utility model

[0009] The utility model discloses a gas cooling device suitable for zinc pot outlet strip steel temperature measuring instrument, to solve the problem in the background art.

[0010] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme: a gas cooling device suitable for zinc pot outlet strip steel temperature measuring instrument, comprising,

[0011] The air cooling protection box is arranged on the fixed support through the rotating support, and the fixed support is arranged at one side of the zinc pot outlet strip steel;

[0012] The air blowing mechanism is arranged on the air cooling protection box;

[0013] The infrared temperature measuring instrument is arranged in the air cooling protection box, and the infrared temperature measuring instrument and the air blowing mechanism are connected through the fixed bolt;

[0014] The vortex cooling mechanism is arranged on the air cooling protection box, and the vortex cooling mechanism is used for conveying cold gas to the air cooling protection box and cooling the infrared temperature measuring instrument.

[0015] Preferably, the air cooling protection box comprises a bottom box body and an upper cover body;

[0016] The bottom box body and the upper cover body are inclined diagonal triangular structures, the lower connecting part of the bottom box body and the upper cover body is buckled through the hasp, and the upper end connecting part of the bottom box body and the upper cover body is connected through the hinge;

[0017] A sealing rubber strip is arranged between the bottom box body and the upper cover body.

[0018] Preferably, the side surface of the bottom box body is provided with a temperature measuring port corresponding to the temperature measuring end of the infrared temperature measuring instrument, and the temperature measuring end of the infrared temperature measuring instrument is arranged towards the zinc pot outlet strip steel through the temperature measuring port.

[0019] Preferably, the air blowing mechanism is connected to 0.2-0.3MPa compressed air through a gas inlet.

[0020] Preferably, the air blowing mechanism is connected to 0.2-0.3MPa compressed air through a gas inlet.

[0021] Preferably, the vortex cooling mechanism comprises a vortex cooler.

[0022] The vortex cooler is arranged on the air cooling protection box, and a cold air outlet of the vortex cooler is connected to the air cooling protection box; the vortex cooler is connected to 0.5-0.7MPa clean compressed air through an air inlet, and a heating air outlet is arranged on the vortex cooler.

[0023] Preferably, the air cooling protection box is provided with a high-temperature shielding cable connected to the infrared temperature measuring instrument; the high-temperature shielding cable is connected to a PLC; the PLC is internally provided with a 24VDC power supply; the PLC supplies power to the infrared temperature measuring instrument through the 24VDC power supply; and the infrared temperature measuring instrument outputs a 4-20mA temperature measuring signal to the PLC through the high-temperature shielding cable.

[0024] Compared with the prior art, the present application has the following beneficial effects:

[0025] The air cooling protection box, the air blowing mechanism and the vortex cooling mechanism are used; 0.5-0.7MPa clean compressed air is connected to the vortex cooler through an air inlet; the vortex cooler generates cold air; the cold air is continuously supplied to the air cooling protection box through a cold air outlet connected to the air cooling protection box; the infrared temperature measuring instrument in the air cooling protection box is cooled; 0.2-0.3MPa compressed air is connected to the air blowing mechanism through a gas inlet; the temperature measuring end of the infrared temperature measuring instrument is blown; dust is prevented from shielding the temperature measuring end of the infrared temperature measuring instrument; the infrared temperature measuring instrument is effectively protected; the air cooling protection box is designed as an isolated refrigeration bin; the loss of cold air generated by the vortex cooler is reduced; the loss speed of the cold air is slowed down; the working environment temperature of the infrared temperature measuring instrument is effectively reduced; the safety risk hidden danger of over-temperature of the infrared temperature measuring instrument leading to reduction of service life and potential temperature measuring abnormality is avoided; the cooling rate and the production rate of the zinc pot outlet strip steel after galvanizing are adjusted; good product performance is effectively ensured; the problem of increased production cost caused by quality defects of adhesion of the strip surface of the top roller plate and reduction of the service life of the infrared temperature measuring instrument is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 It is a front view structural schematic diagram of the present application;

[0027] Fig. 2 It is a side view structural schematic diagram of the present application;

[0028] Fig. 3 It is the three-dimensional structure schematic view of the air cooling protection box of the utility model.

[0029] In the drawing: 1, air cooling protection box; 101, bottom box body; 102, upper cover body; 103, buckle; 104, hinge; 2, rotating support; 3, fixed support; 4, zinc pot outlet strip steel; 5, air purging mechanism; 501, gas inlet; 6, infrared thermometer; 7, vortex cooling mechanism; 701, vortex cooler; 702, air inlet; 703, heating gas exhaust port; 8, fixing bolt; 9, high-temperature shield cable. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0031] Please refer to Figs. 1-3 The utility model provides a kind of gas cooling device suitable for zinc pot outlet strip steel thermometer, comprising,

[0032] Air cooling protection box 1 is set on fixed support 3 by rotating support 2, fixed support 3 is set at the side of zinc pot outlet strip steel 4, air cooling protection box 1 includes bottom box body 101 and upper cover body 102;Bottom box body 101 and upper cover body 102 are diagonal triangle structure, the lower part connecting place of bottom box body 101 and upper cover body 102 is buckled by buckle 103, the upper end connecting place of bottom box body 101 and upper cover body 102 is connected by hinge 104;

[0033] In the utility model, air cooling protection box 1 adopts bottom box body 101 and upper cover body 102 structure design, bottom box body 101 and upper cover body 102 are connected by buckle 103 and hinge 104, after upper cover body 102 is opened, infrared thermometer 6 parameter setting and visual sighting angle adjustment can be carried out in the rear display board end of infrared thermometer 6, which is convenient for device maintenance and use;

[0034] Sealing rubber strip is arranged between bottom box body 101 and upper cover body 102, to improve the connection sealing property of air cooling protection box 1, further slow down the speed of refrigeration air loss;

[0035] Temperature measuring port is formed in the side of bottom box body 101 corresponding to the temperature measuring end of infrared thermometer 6, and the temperature measuring end of infrared thermometer 6 is arranged towards zinc pot outlet strip steel 4 through the temperature measuring port;

[0036] The air blowing mechanism 5 is arranged on the air cooling protection box 1, the air blowing mechanism 5 is connected with the 0.2-0.3MPa compressed air through the gas inlet 501, and the blowing air outlet of the air blowing mechanism 5 is aligned with the temperature measuring end of the infrared temperature measuring instrument 6;

[0037] The infrared temperature measuring instrument 6 is arranged in the air cooling protection box 1, the infrared temperature measuring instrument 6 is connected with the air blowing mechanism 5 through the fixing bolt 8, the high-temperature shielding cable 9 connected with the infrared temperature measuring instrument 6 is arranged on the air cooling protection box 1, the high-temperature shielding cable 9 is connected with the PLC, the PLC is internally provided with the 24VDC power supply, the PLC supplies power to the infrared temperature measuring instrument 6 through the 24VDC power supply, and the infrared temperature measuring instrument 6 outputs the 4-20mA temperature measuring signal to the PLC through the high-temperature shielding cable 9;

[0038] The vortex cooling mechanism 7 is arranged on the air cooling protection box 1, and the vortex cooling mechanism 7 is used for delivering the cold air to the air cooling protection box 1 and cooling the infrared temperature measuring instrument 6; the vortex cooling mechanism 7 comprises a vortex cooler 701; the vortex cooler 701 is arranged on the air cooling protection box 1, the cold air outlet of the vortex cooler 701 is connected with the air cooling protection box 1, the vortex cooler 701 is connected with the 0.5-0.7Mpa clean compressed air through the air inlet 702, and the vortex cooler 701 is provided with the heating gas exhaust port 703.

[0039] The air cooling protection box 1, the air blowing mechanism 5 and the vortex cooling mechanism 7 are arranged, when in use, the 0.5-0.7Mpa clean compressed air is delivered to the vortex cooler 701 through the air inlet 702, the vortex cooler 701 generates the cold air, the cold air outlet of the vortex cooler 701 continuously delivers the cold air to the air cooling protection box 1, the infrared temperature measuring instrument 6 in the air cooling protection box 1 is cooled, meanwhile, the 0.2-0.3MPa compressed air is delivered to the air blowing mechanism 5 through the gas inlet 501, the temperature measuring end of the infrared temperature measuring instrument 6 is blown, dust is prevented from shielding the temperature measuring end of the infrared temperature measuring instrument 6, the infrared temperature measuring instrument 6 is effectively protected, the air cooling protection box 1, the air blowing mechanism 5 and the vortex cooling mechanism 7 are combined to form the cooling mode, the air cooling protection box 1 adopts the isolation refrigeration bin design, the loss of the cold air generated by the vortex cooler is prevented from being too much, the loss speed of the cold air is slowed down, the working environment temperature of the infrared temperature measuring instrument 6 is effectively reduced, the potential safety risk hidden danger that the service life of the infrared temperature measuring instrument 6 is reduced and potential temperature measuring abnormality is caused due to overtemperature is avoided, the potential safety risk hidden danger that the traditional water cooling mode is avoided, the water leaks into the zinc pot and reacts with the zinc liquid to cause explosion, the cooling rate and the production rate of the zinc pot outlet strip steel after being galvanized are protected, good product performance is effectively ensured, the quality defect that the tower top roll plate belt surface is adhered is avoided, and the production cost increase problem caused by the reduced service life of the infrared temperature measuring instrument 6 is avoided.

[0040] In summary, the use method of the gas cooling device suitable for the zinc pot outlet strip steel temperature measuring instrument provided by the embodiment is as follows: during use, 0.5-0.7 Mpa clean compressed air is introduced into the vortex cooler 701 through the air inlet 702, the vortex cooler 701 generates cooling gas, the cooling gas is continuously delivered into the gas cooling protection box 1 through the cooling gas inlet of the gas cooling protection box 1, the infrared temperature measuring instrument 6 in the gas cooling protection box 1 is cooled, the heating gas of the vortex cooler 701 is discharged through the heating gas discharge port 703, and 0.2-0.3 Mpa compressed air is introduced into the air blowing mechanism 5 through the air inlet 501, the temperature measuring end of the infrared temperature measuring instrument 6 is blown, dust is prevented from shielding the temperature measuring end of the infrared temperature measuring instrument 6, and the infrared temperature measuring instrument 6 is effectively protected.

[0041] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A gas cooling device suitable for a strip temperature measuring instrument at the outlet of a zinc pot, characterized in that, include, Air-cooled protection box (1), the air-cooled protection box (1) is mounted on a fixed bracket (3) via a rotating bracket (2), the fixed bracket (3) is mounted on one side of the zinc pot outlet strip steel (4); An air purging mechanism (5) is installed on the air-cooled protection box (1); Infrared thermometer (6), the infrared thermometer (6) is installed in the air-cooled protection box (1), and the infrared thermometer (6) and the air purging mechanism (5) are connected by fixing bolts (8); The vortex cooling mechanism (7) is installed on the air-cooled protection box (1) and is used to supply cold air to the air-cooled protection box (1) and cool the infrared thermometer (6).

2. The gas cooling device for a strip steel temperature measuring instrument at the outlet of a zinc pot according to claim 1, characterized in that: The air-cooled protection box (1) includes a bottom box (101) and an upper cover (102). The bottom box (101) and the top cover (102) are in a diagonal triangular structure. The lower part of the bottom box (101) and the top cover (102) are fastened by a buckle (103), and the upper part of the bottom box (101) and the top cover (102) are connected by a hinge (104). A sealing strip is provided between the bottom box (101) and the top cover (102).

3. A gas cooling device for a strip steel temperature measuring instrument at the outlet of a zinc pot, as described in claim 2, characterized in that: The side of the bottom box (101) is provided with a temperature measuring port corresponding to the temperature measuring end of the infrared thermometer (6), and the temperature measuring end of the infrared thermometer (6) is set towards the zinc pot outlet strip (4) through the temperature measuring port.

4. A gas cooling device for a strip steel temperature measuring instrument at the outlet of a zinc pot, as described in claim 1, characterized in that: The air purging mechanism (5) introduces 0.2-0.3MPa compressed air through the gas inlet (501).

5. A gas cooling device for a strip steel temperature measuring instrument at the outlet of a zinc pot, as described in claim 4, characterized in that: The air purging mechanism (5) has its purging port aligned with the temperature measuring end of the infrared thermometer (6).

6. A gas cooling device for a strip steel temperature measuring instrument at the outlet of a zinc pot according to claim 1, characterized in that: The vortex cooling mechanism (7) includes a vortex cooler (701); The vortex cooler (701) is installed on the air-cooled protection box (1), and the cold air port of the vortex cooler (701) is connected to the air-cooled protection box (1). The vortex cooler (701) is supplied with 0.5-0.7Mpa clean compressed air through the air inlet (702). The vortex cooler (701) is provided with a heating gas exhaust port (703).

7. A gas cooling device for a strip steel temperature measuring instrument at the outlet of a zinc pot according to claim 1, characterized in that: The air-cooled protection box (1) is equipped with a high-temperature shielded cable (9) connected to the infrared thermometer (6). The high-temperature shielded cable (9) is connected to a PLC. The PLC has a built-in 24VDC power supply. The PLC supplies power to the infrared thermometer (6) through the 24VDC power supply. The infrared thermometer (6) outputs a 4-20mA temperature measurement signal to the PLC through the high-temperature shielded cable (9).

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