Non-contact infrared temperature measuring device for zinc liquid of cold-rolled galvanized wire

Abstract

The utility model discloses a non-contact infrared temperature measuring device for zinc liquid of a cold-rolled galvanized wire, which comprises a stainless steel observation tube, the stainless steel observation tube is adjustably arranged above a zinc pot through a mounting platform and a support frame, and the lower end of the stainless steel observation tube extends into the zinc liquid in the zinc pot. The infrared thermometer is arranged on the installation platform through an installation support, the input end of the infrared thermometer is connected with an optical fiber probe inserted into the upper portion of the stainless steel observation pipe through an optical fiber, the PLC upper computer is connected with the infrared thermometer, and the PLC upper computer is further connected with a display terminal. The device is provided with the stainless steel observation tube, the mounting platform, the support frame, the infrared thermometer, the optical fiber probe, the PLC upper computer and the display terminal, so that non-contact temperature measurement of the infrared thermometer and a zinc liquid temperature measurement point is realized, and real-time online continuous accurate measurement of the temperature of the zinc liquid in a zinc pot is realized; the problems that a contact type thermocouple is easy to damage during temperature measurement, not durable and large in maintenance amount are effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to infrared temperature measurement technical field, concretely relates to a non -contact infrared temperature measuring device of cold rolled galvanizing line zinc liquid. BACKGROUND

[0002] Because zinc has anticorrosive property, is usually used as strip steel plating material, zinc plating, zinc aluminum plating and hot galvanizing ( after heating galvanizing layer) are the most common several galvanizing modes, it can make steel surface form a layer of strong durable zinc layer to prevent strip steel corrosion and oxidation, the conventional production process is that after strip steel is annealed from annealing furnace, enters zinc pot through furnace nose and soaks zinc liquid ( zinc pot is generally electric heating zinc liquid), makes zinc liquid in zinc pot adhere to the surface of strip steel and form zinc layer, then dries after going out of zinc pot, in the galvanizing process, the accurate control of zinc liquid temperature in zinc pot is of great significance, too high zinc liquid temperature can lead to zinc liquid evaporation too fast, reduces plating layer thickness, and additionally increases energy consumption, simultaneously, high galvanizing temperature can also lead to the corrosion speed of zinc liquid to zinc pot and steel part to accelerate, makes zinc pot service life shorten, produces more zinc slag, increases zinc consumption, wastes energy, thereby makes production cost increase, and profit reduces, too low zinc liquid temperature can lead to zinc dissolution not enough, uneven plating layer, poor zinc backflow property causes the surface of strip steel not smooth, influences product quality, therefore, accurate measurement and control zinc pot temperature, ensure reasonable zinc pot temperature control range, it is the key link in hot galvanizing process.

[0003] The existing cold rolled galvanizing line zinc liquid ( in zinc pot) temperature measurement generally adopts the contact type temperature measurement method of inserting thermocouple in zinc pot, but has following several aspects of disadvantages:

[0004] (1), liquid zinc has certain corrosiveness and leads to thermocouple easy to damage;

[0005] (2), the zinc liquid temperature in conventional galvanizing zinc pot is as high as about 460 DEG C, and the temperature of zinc aluminum magnesium alloy zinc pot is as high as 700 DEG C, too high temperature greatly damages contact type thermocouple, and the service life of thermocouple is greatly reduced, which greatly increases the workload of on-site operator in maintaining and replacing thermocouple and the production operation cost of replacing expensive thermocouple in industrial production site;

[0006] (3), zinc often adheres to the surface of thermocouple and forms zinc slag, leading to the deviation of measured temperature;

[0007] Therefore, we propose a non-contact infrared temperature measuring device for cold rolled galvanizing line zinc liquid. Utility model content

[0008] The utility model aims at providing a non-contact infrared temperature measuring device for cold rolled galvanizing line zinc liquid to solve the problems in the above background.

[0009] To achieve the above purpose, the utility model provides the following technical solutions: a non-contact infrared temperature measuring device for zinc liquid in a cold-rolled galvanizing line, comprising:

[0010] A stainless steel observation tube, the stainless steel observation tube being adjusted and arranged above the zinc pot through the mounting platform and the support frame, and the lower end of the stainless steel observation tube extending into the zinc liquid in the zinc pot;

[0011] An infrared thermometer, the infrared thermometer is mounted on the mounting platform via a mounting bracket, and an input end of the infrared thermometer is connected to a fiber optic probe inserted into the upper portion of the stainless steel observation tube via an optical fiber;

[0012] A PLC host computer is connected to the infrared thermometer and is also connected to a display terminal.

[0013] Preferably, refractory mud is provided on the outer side of the lower portion of the stainless steel observation tube.

[0014] Preferably, the lower end of the stainless steel observation tube extends vertically into the zinc liquid in the zinc pot, so that a zinc liquid temperature measuring point is formed between the lower end of the stainless steel observation tube and the zinc liquid.

[0015] Preferably, the support frame and the stainless steel observation tube are connected by a snap fastener.

[0016] Preferably, the support frame is a double-layer sleeve structure, and the double-layer sleeves are connected by bolts for adjustment.

[0017] Preferably, the optical fiber probe and the stainless steel observation tube are connected by bolts, and the connection between the optical fiber probe and the stainless steel observation tube is sealed.

[0018] Preferably, the infrared thermometer is provided with a cooling jacket, and the cooling jacket is provided with a cooling air inlet.

[0019] Preferably, the infrared thermometer and the PLC host computer are connected via a six-core cable;

[0020] The PLC host computer is connected to a 24VDC power supply, and the PLC host computer is used to provide a 24VDC power supply to the infrared thermometer;

[0021] The infrared thermometer outputs a 4-20mA temperature signal to the PLC host computer through the six-core cable.

[0022] Preferably, the infrared thermometer is a 1.6 micron short-wavelength narrow-wavelength optical fiber infrared thermometer.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. The utility model discloses a stainless steel observation tube, mounting platform, support frame, infrared thermometer, optical fiber probe, PLC host computer and display terminal are equipped, when using, through mounting platform and support frame set up the stainless steel observation tube above zinc pot, and the lower end of stainless steel observation tube extends into the zinc liquid in zinc pot, makes the lower end of stainless steel observation tube and zinc liquid form zinc liquid temperature measuring point, the input end of infrared thermometer is connected with the optical fiber probe inserted in the upper portion of stainless steel observation tube with optical fiber, makes infrared thermometer and zinc liquid temperature measuring point realize non - contact temperature measurement, provides 24VDC power supply to infrared thermometer through PLC host computer, infrared thermometer starts temperature measurement, and 4-20mA temperature signal is exported to PLC host computer, and through display terminal, the zinc liquid temperature is displayed in real time, realize the real - time on - line continuous accurate measurement of zinc liquid temperature in zinc pot, effectively solve the problem that contact type thermocouple temperature measurement is easy to damage, not durable, and the maintenance amount is big;

[0025] 2. The utility model discloses a stainless steel observation tube inserts into the zinc liquid in zinc pot, avoids the direct contact of the dross on the surface of zinc liquid and the temperature measuring end of infrared thermometer, avoids the corrosion of zinc liquid to temperature measuring instrument, effectively protects temperature measuring instrument;

[0026] 3. In the utility model, the optical fiber probe is inserted into the upper portion of the stainless steel observation tube, the optical fiber probe and the stainless steel observation tube are connected in a sealed manner, and the vacuum layer formed between the zinc liquid and the optical fiber probe effectively avoids the problem of lens contamination of the optical fiber probe, reduces the cleaning workload of the optical fiber probe, and improves the temperature measurement accuracy.

[0027] 4. The utility model discloses a refractory mortar is arranged on the lower portion of the stainless steel observation tube, which can reduce the corrosion of the zinc liquid to the stainless steel observation tube and prolong the service life of the stainless steel observation tube. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The utility model discloses a temperature measuring device schematic view.

[0029] In the figure: 1, stainless steel observation tube; 2, mounting platform; 3, support frame; 4, infrared thermometer; 5, mounting bracket; 6, optical fiber; 7, optical fiber probe; 8, PLC host computer; 9, display terminal; 10, refractory mortar; 11, zinc liquid temperature measuring point; 12, cooling jacket; 13, cooling air inlet; 14, six-core 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 belong to the scope of protection of the utility model.

[0031] Please refer to Figure 1 The non-contact infrared temperature measuring device for zinc liquid of the cold rolling galvanizing line has the advantages of simple structure, convenient operation, high temperature measuring accuracy, and high temperature measuring precision.

[0032] The lower end of the stainless steel observation tube 1 extends vertically into the zinc liquid in the zinc pot, so that the zinc liquid measuring point 11 is formed between the lower end of the stainless steel observation tube 1 and the zinc liquid.

[0033] The stainless steel observation tube 1 is inserted into the zinc liquid in the zinc pot, so that the zinc liquid surface scum is prevented from directly contacting the temperature measuring end of the infrared temperature measuring instrument 4, the zinc liquid corrosion of the temperature measuring instrument is avoided, and the temperature measuring instrument is effectively protected.

[0034] The infrared temperature measuring instrument 4 is a 1.6-micron wave band short wave narrow wavelength optical fiber type infrared temperature measuring instrument, which can effectively avoid the influence of zinc liquid thermal radiation on infrared temperature measurement, improve the infrared temperature measurement accuracy, and is arranged on the mounting platform 2 through the mounting bracket 5.

[0035] The optical fiber probe 7 is inserted into the upper part of the stainless steel observation tube 1, the optical fiber probe 7 and the stainless steel observation tube 1 are sealingly connected, a vacuum layer formed between the zinc liquid and the optical fiber probe 7 effectively avoids the problem of dirty lens of the optical fiber probe 7, reduces the cleaning workload of the optical fiber probe, and improves the temperature measuring accuracy.

[0036] The PLC upper computer 8 is connected with the infrared temperature measuring instrument 4, and the infrared temperature measuring instrument 4 and the PLC upper computer 8 are connected through the six-core cable 14.

[0037] The utility model discloses a stainless steel observation tube 1, installation platform 2, support frame 3, infrared temperature measuring instrument 4, optical fiber probe 7, PLC host computer 8 and display terminal 9 are provided, when using, through installation platform 2 and support frame 3, the stainless steel observation tube 1 is set in the zinc pot top, and the lower end of stainless steel observation tube 1 extends into the zinc liquid in the zinc pot perpendicularly, forms the zinc liquid temperature measuring point 11 between the lower end of stainless steel observation tube 1 and zinc liquid, and the input end of infrared temperature measuring instrument 4 is connected with the optical fiber probe 7 inserted in the upper portion of stainless steel observation tube 1 through optical fiber 6, makes infrared temperature measuring instrument 4 and zinc liquid temperature measuring point 11 realize non - contact temperature measurement, provides 24VDC power supply to infrared temperature measuring instrument 4 through PLC host computer 8, and infrared temperature measuring instrument 4 starts temperature measurement, and 4-20mA temperature signal is exported to PLC host computer 8, and the zinc liquid temperature is displayed in real time through display terminal 9, realizes the real -time on -line continuous accurate measurement of zinc liquid temperature in zinc pot, effectively solves the problem of easy damage, not durable, the maintenance of contact type thermocouple temperature measurement is big.

[0038] In the embodiment, as shown in the figure, Figure 1 The lower outer side of the stainless steel observation tube 1 is provided with fire clay 10.

[0039] The utility model discloses a stainless steel observation tube 1's lower outer side is provided with fire clay 10, can reduce the corrosion of zinc liquid to stainless steel observation tube 1, prolongs the service life of stainless steel observation tube 1.

[0040] In the embodiment, as shown in the figure, Figure 1 Support frame 3 and stainless steel observation tube 1 are connected through a live buckle clamp, support frame 3 is a double-layer sleeve structure, and the double-layer sleeves are connected through bolt adjustment.

[0041] The utility model discloses a stainless steel observation tube 1 is adjusted and set through support frame 3 and live buckle clamp, is convenient for stainless steel observation tube 1 adjustment and inserts the depth of zinc liquid in zinc pot, and is convenient to dismount and replace.

[0042] In the embodiment, as shown in the figure, Figure 1 Cooling jacket 12 is arranged on infrared temperature measuring instrument 4, cooling gas inlet 13 is arranged on cooling jacket 12, cooling gas inlet 13 is connected with 0.2-0.3Mpa cooling gas, can effectively cool infrared temperature measuring instrument 4, guarantees the normal use of infrared temperature measuring instrument 4.

[0043] In summary, the use method of the non-contact infrared temperature measuring device for zinc liquid of the cold rolling galvanizing line provided by the embodiment is as follows: when in use, the stainless steel observation tube 1 is arranged above the zinc pot through the installation platform 2 and the support frame 3, and the lower end of the stainless steel observation tube 1 extends vertically into the zinc liquid in the zinc pot, so that the zinc liquid temperature measuring point 11 is formed between the lower end of the stainless steel observation tube 1 and the zinc liquid, the input end of the infrared temperature measuring instrument 4 is connected with the optical fiber probe 7 inserted into the upper part of the stainless steel observation tube 1 through the optical fiber 6, so that the infrared temperature measuring instrument 4 and the zinc liquid temperature measuring point 11 realize non-contact temperature measurement, the infrared temperature measuring instrument 4 is provided with 24VDC power supply by the PLC host computer 8, the infrared temperature measuring instrument 4 starts temperature measurement, and outputs 4-20mA temperature signal to the PLC host computer 8, and the zinc liquid temperature is displayed in real time through the display terminal 9, so that the real-time online continuous and accurate measurement of the zinc liquid temperature in the zinc pot is realized.

[0044] 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 non-contact infrared temperature measuring device for zinc liquid in a cold-rolled galvanizing line, characterized in that: include, A stainless steel observation tube (1), wherein the stainless steel observation tube (1) is adjusted and arranged above the zinc pot through the installation platform (2) and the support frame (3), and the lower end of the stainless steel observation tube (1) extends into the zinc liquid in the zinc pot; An infrared thermometer (4), the infrared thermometer (4) being arranged on the mounting platform (2) via a mounting bracket (5), the input end of the infrared thermometer (4) being connected to an optical fiber probe (7) inserted into the upper portion of the stainless steel observation tube (1) via an optical fiber (6); A PLC host computer (8), the PLC host computer (8) is connected to the infrared thermometer (4), and the PLC host computer (8) is also connected to a display terminal (9).

2. The non-contact infrared temperature measuring device for zinc bath in a cold-rolled galvanizing line according to claim 1, characterized in that: Refractory mud (10) is provided on the outer side of the lower portion of the stainless steel observation tube (1).

3. The non-contact infrared temperature measuring device for zinc bath in a cold-rolled galvanizing line according to claim 1, characterized in that: The lower end of the stainless steel observation tube (1) extends vertically into the zinc liquid in the zinc pot, so that a zinc liquid temperature measuring point (11) is formed between the lower end of the stainless steel observation tube (1) and the zinc liquid.

4. The non-contact infrared temperature measuring device for zinc bath in a cold-rolled galvanizing line according to claim 1, characterized in that: The support frame (3) and the stainless steel observation tube (1) are connected via a snap fastener.

5. The non-contact infrared temperature measuring device for zinc bath in a cold-rolled galvanizing line according to claim 4, characterized in that: The support frame (3) is a double-layer sleeve structure, and the double-layer sleeves are connected by bolts for adjustment.

6. The non-contact infrared temperature measuring device for zinc bath in a cold-rolled galvanizing line according to claim 1, characterized in that: The optical fiber probe (7) and the stainless steel observation tube (1) are connected via bolts, and the connection between the optical fiber probe (7) and the stainless steel observation tube (1) is sealed.

7. The non-contact infrared temperature measuring device for zinc bath in a cold-rolled galvanizing line according to claim 1, characterized in that: The infrared thermometer (4) is provided with a cooling jacket (12), and the cooling jacket (12) is provided with a cooling air inlet (13).

8. The non-contact infrared temperature measuring device for zinc bath in a cold-rolled galvanizing line according to claim 1, characterized in that: The infrared thermometer (4) and the PLC host computer (8) are connected via a six-core cable (14); The PLC host computer (8) is connected to a 24VDC power supply, and the PLC host computer (8) is used to provide a 24VDC power supply to the infrared thermometer (4); The infrared thermometer (4) outputs a 4-20mA temperature signal to the PLC host computer (8) via the six-core cable (14).

9. The non-contact infrared temperature measuring device for zinc bath in a cold-rolled galvanizing line according to claim 1, characterized in that: The infrared thermometer (4) is a 1.6 micron short-wavelength narrow-wavelength optical fiber infrared thermometer.

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