Method for solving water seepage of thermocouple intubation tube of continuous casting crystallizer

Abstract

The invention relates to a method for solving water seepage of a thermocouple intubation tube of a continuous casting crystallizer, which specifically comprises the following steps of: 1, cutting the end part of the intubation tube into a boss shape by using a machine tool, 2, manufacturing an annular sealing gasket by using rubber, and 3, sleeving the boss of the intubation tube with the annular sealing gasket manufactured in the step 2, and then inserting the annular sealing gasket into a back plate of the crystallizer, 4, after the step 3 is completed, the insertion depth of the insertion pipe is adjusted, and the sealing performance is guaranteed, 5, after the step 4 is completed, a hydrostatic test is conducted on the crystallizer, under the specified test time and test pressure, if water seepage does not occur, the sealing performance is good, and if water seepage occurs, the water seepage does not occur. And 6, the crystallizer which is tested to be qualified in the step 5 is sent to the next procedure, and a thermocouple is installed. According to the technical scheme, the sealing structure at the end part of the thermocouple insertion tube is improved, so that the purpose of high sealing performance is achieved.

Description

Technical Field

[0001] The invention relates to a method, in particular to a method for solving water seepage in a thermocouple inserting tube of a continuous casting crystallizer, and belongs to the technical field of continuous casting crystallizer equipment. Background Art

[0002] At present, it is common to install thermocouples inside the wide copper plate of the continuous casting crystallizer. The purpose is to measure the temperature of the crystallizer to prevent steel leakage during continuous casting; and to control the temperature distribution of the copper plate of the crystallizer to prevent crack defects from occurring when the molten steel in the crystallizer solidifies into a billet shell.

[0003] The wide face device of the crystallizer consists of the wide face copper plate of the crystallizer (i.e. the copper plate in contact with the molten steel during continuous casting) and the back copper plate (referred to as the back plate). The thermocouple is placed in the thermocouple insert in the back plate of the crystallizer, and then the back plate is closed with the front copper plate of the crystallizer to assemble the crystallizer. When the thermocouple is measuring the temperature, its measuring head is inside the copper plate of the crystallizer (the body is inside the back plate), in contact with the copper plate, so as to measure the temperature of the copper plate of the crystallizer. However, peers have encountered the problem of water seepage in the thermocouple insert.

[0004] The reason for water seepage in the thermocouple tube is that when the back plate and the copper plate of the crystallizer are closed, an interface is formed, and the end of the internal thermocouple tube (circular cross-section) is tightly against the interface. Due to poor sealing, cooling water inside the copper plate of the crystallizer often penetrates into the tube, causing the thermocouple in the tube to be immersed in water, resulting in inaccurate temperature measurement and causing problems in production (such as frequent steel leakage predictions causing a sudden drop in the billet drawing speed, the temperature distribution of the crystallizer failing to reflect the actual situation, etc.).

[0005] At present, no one in the industry has solved this water seepage problem. Some of them have to weld the end of the thermocouple insert to the above-mentioned interface of the crystallizer copper plate. Although the water seepage problem is solved, it affects the service life of the crystallizer copper plate and affects daily assembly and disassembly. This method cannot be promoted. Therefore, it is an urgent task to find a solution to the water seepage of the crystallizer thermocouple insert. Summary of the invention

[0006] The present invention aims at the problems existing in the prior art and provides a method for solving the water seepage of the thermocouple insert tube of the continuous casting crystallizer. The technical solution achieves the purpose of high sealing by improving the sealing structure of the end of the thermocouple insert tube.

[0007] In order to achieve the above object, the technical solution of the present invention is as follows: a method for solving water seepage in a thermocouple insert tube of a continuous casting crystallizer, the method comprising the following steps:

[0008] Step 1: Use a machine tool to cut the end of the cannula into a boss shape according to the required size.

[0009] Step 2: Make a rubber ring with the required size.

[0010] Step 3: Put the annular sealing gasket made in step 2 on the inserting boss formed in step 1, and then insert it into the back plate of the crystallizer, and close the copper plate of the crystallizer with the back plate, tighten it as required, and assemble it into the wide surface device of the crystallizer.

[0011] Step 4: After completing step 3, adjust the insertion depth of the cannula to ensure sealing performance.

[0012] Step 5: After completing step 4, perform a water pressure test on the crystallizer. If there is no water seepage under the specified test time and test pressure, it means that the sealing is good. If there is water seepage, continue to adjust the insertion depth until there is no water seepage.

[0013] Step 6: Send the crystallizer that has passed the test in step 5 to the next process and install the thermocouple.

[0014] As an improvement of the present invention, in step 1, the height of the boss is 2-4 mm, and the width of the surrounding annular surface is 3-5 mm.

[0015] As an improvement of the present invention, in step 2, the width of the annular sealing gasket is 3-5 mm.

[0016] As an improvement of the present invention, in step 3, the prepared insert tube is inserted into the insert tube mounting hole of the wide-surface back plate of the crystallizer, the tail of the insert tube is rotated with a socket wrench so that the sealing ring is exposed 1 mm from the back plate, the crystallizer copper plate and the back plate are closed together to assemble into a wide-surface device of the crystallizer. At this time, there is an interface at the closing point, so that the annular sealing gasket on the insert tube contacts the copper plate surface on the interface.

[0017] As an improvement of the present invention, the seal is reinforced in step 4 by rotating the tail of the insert tube with a socket wrench by 180° so that the annular seal is in close contact with the copper plate of the crystallizer to prevent water seepage.

[0018] As an improvement of the present invention, in step 5, a water pressure test is performed to check whether there is water seepage in the cannula. The method is to control the test time to 10 minutes and adjust the test water pressure to 20Kg. If there is no water seepage, it is qualified. If there is water seepage, it is unqualified. At this time, the water in the cannula is cleaned with compressed air, and then the tail of the cannula is rotated with a socket wrench to adjust the compression of the annular sealing ring so that it can be more closely contacted with the copper plate of the crystallizer, and then the water pressure test is performed again until there is no water seepage. If there is water seepage, it is unqualified. Just clean the water in the cannula with compressed air, and then rotate the tail of the cannula with a socket wrench to adjust the compression of the annular sealing ring so that it can be more closely contacted with the copper plate of the crystallizer, and then the water pressure test is performed again until there is no water seepage.

[0019] Compared with the prior art, the present invention has the following advantages: 1. This solution solves the problem of water seepage in the thermocouple insert of the continuous casting crystallizer, making the temperature distribution of the copper plate of the crystallizer in the continuous casting production authentic, and providing a real monitoring means for production quality control; 2. The improved contact between the annular gasket and the copper plate, the gasket width is 3-5 mm, and the contact area with the copper plate is larger, eliminating the slow water seepage caused by the low finish of the copper plate. 3. This solution achieves sealing by compressing the annular gasket, solving the problem of direct contact between the insert end face and the copper plate, and eliminating the original design scheme that the insert end face crushes the copper plate due to direct contact with the copper plate. In order to ensure the flatness of the copper plate, the copper plate must be plane-processed with a milling machine or grinder, thereby increasing the service life of the copper plate and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall assembly structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the cannula structure of the present invention;

[0022] Figure 3 Schematic diagram of the sealing ring structure.

[0023] In the figure: 1, crystallizer copper plate, 2, back plate, 3, insert tube end face boss, 4, sealing ring, 5, insert tube, 6, rectangular ring fixing boss, 7, insert tube end face. DETAILED DESCRIPTION

[0024] In order to deepen the understanding of the present invention, the present embodiment is described in detail below with reference to the accompanying drawings.

[0025] Example 1: See Figure 1-Figure 3 A method for solving water seepage in a thermocouple tube of a continuous casting crystallizer, the method comprising the following steps:

[0026] Step 1: Use a machine tool to cut the end of the cannula into a boss shape according to the required size.

[0027] Step 2: Make a rubber ring with the required size.

[0028] Step 3: Put the annular sealing gasket made in step 2 on the inserting boss formed in step 1, and then insert it into the back plate of the crystallizer, and close the copper plate of the crystallizer with the back plate, tighten it as required, and assemble it into the wide surface device of the crystallizer.

[0029] Step 4: After completing step 3, adjust the insertion depth of the cannula to ensure sealing performance.

[0030] Step 5: After completing step 4, perform a water pressure test on the crystallizer. If there is no water seepage under the specified test time and test pressure, it means that the sealing is good. If there is water seepage, continue to adjust the insertion depth until there is no water seepage.

[0031] Step 6: Send the crystallizer that has passed the test in step 5 to the next process and install the thermocouple.

[0032] Among them, in step 1, the height of the boss is 2-4 mm, the width of the surrounding annular surface is 3-5 mm, in step 2, the width of the annular sealing gasket is 3-5 mm, in step 3, the prepared insert is inserted into the insert installation hole of the wide-face back plate of the crystallizer, and the tail of the insert is rotated with a socket wrench so that the sealing ring is exposed 1 mm from the back plate, and the crystallizer copper plate and the back plate are closed together to assemble the wide-face device of the crystallizer. At this time, there is an interface at the closing position, so that the annular sealing gasket on the insert contacts the copper plate surface on the interface, and the reinforcing seal is performed in step 4 by rotating with a socket wrench. Turn the tail of the insert tube 180° to make the annular seal ring in close contact with the copper plate of the crystallizer to prevent water seepage. In step 5, perform a water pressure test to check whether there is water seepage in the insert tube. The method is to control the test time to 10 minutes and adjust the test water pressure to 20Kg. If there is no water seepage, it is qualified. If there is water seepage, it is unqualified. At this time, clean the water in the insert tube with compressed air, and then use a socket wrench to rotate the tail of the insert tube to adjust the compression of the annular seal ring to make it more closely contact with the copper plate of the crystallizer, and then perform a water pressure test until there is no water seepage.

[0033] It should be noted that the above embodiments are not intended to limit the protection scope of the present invention, and equivalent changes or substitutions made on the basis of the above technical solutions all fall within the protection scope of the claims of the present invention.

Claims

1. A method for solving water seepage in thermocouple tubes of continuous casting crystallizers, characterized in that: The method comprises the following steps: Step 1: Use a machine tool to cut the end of the cannula into a boss shape. Step 2: Make a rubber ring. Step 3: Put the annular sealing gasket made in step 2 on the inserting boss formed in step 1, and then insert it into the back plate of the crystallizer, and close the copper plate of the crystallizer with the back plate, tighten it as required, and assemble it into the wide surface device of the crystallizer. Step 4: After completing step 3, adjust the insertion depth of the cannula to ensure sealing performance. Step 5: After completing step 4, perform a water pressure test on the crystallizer. If there is no water seepage under the specified test time and test pressure, it means that the sealing is good. If there is water seepage, continue to adjust the insertion depth until there is no water seepage. Step 6: Send the crystallizer that has passed the test in step 5 to the next process and install the thermocouple.

2. The method for solving water seepage in the thermocouple tube of the continuous casting crystallizer according to claim 1 is characterized in that: In step 1, the height of the boss is 2-4 mm, and the width of the surrounding annular surface is 3-5 mm.

3. The method for solving water seepage in the thermocouple tube of the continuous casting crystallizer according to claim 2 is characterized in that: In step 2, the width of the annular sealing gasket is 3-5 mm.

4. The method for solving water seepage in the thermocouple tube of the continuous casting crystallizer according to claim 3 is characterized in that: In step 3, insert the prepared insert tube into the insert tube installation hole of the wide-surface back plate of the crystallizer, rotate the tail of the insert tube with a socket wrench so that the sealing ring is exposed 1 mm from the back plate, close the crystallizer copper plate and the back plate together to assemble into a wide-surface device of the crystallizer. At this time, there is an interface at the closing point, so that the annular sealing gasket on the insert tube contacts the copper plate surface on the interface.

5. The method for solving water seepage in the thermocouple tube of the continuous casting crystallizer according to claim 3 or 4, characterized in that: In step 4, the seal is reinforced by rotating the tail of the insert tube by 180° with a socket wrench so that the annular seal ring is in close contact with the copper plate of the crystallizer to prevent water seepage.

6. The method for solving water seepage in the thermocouple tube of the continuous casting crystallizer according to claim 5, characterized in that: In step 5, a water pressure test is performed to check whether there is water seepage in the insert pipe. The method is to control the test time to 10 minutes and adjust the test water pressure to 20Kg. If there is no water seepage, it is qualified; if there is water seepage, it is unqualified. Just clean the water in the insert pipe with compressed air, and then use a socket wrench to rotate the tail of the insert pipe to adjust the compression of the annular sealing ring to make it more closely contact with the copper plate of the crystallizer, and then perform the water pressure test again until there is no water seepage.

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