Electric heating furnace resistance tape conducting rod mounting mechanism

Abstract

The utility model belongs to the technical field of electric heating furnace equipment, and provides an electric heating furnace resistance tape conducting rod mounting mechanism which comprises a fixing plate, a mica insulating sheet, a conducting rod flange sheet and a crimping plate, the fixing plate, the mica insulating sheets, the conducting rod flange sheet and the crimping plate are all annular, a hole in the middle of the fixing plate is sleeved with a porcelain sleeve of the conducting rod of the electric heating furnace, the fixing plate is welded with the contact surface of a furnace shell of the electric heating furnace, and the mica insulating sheets are fixed between the fixing plate and the conducting rod flange sheet and between the conducting rod flange sheet and the crimping plate; the mica insulating sheet and the conducting rod flange sheet are sleeved on the conducting rod; asbestos insulation pads are arranged between the fixing plate and the mica insulation sheet and between the mica insulation sheet and the conducting rod flange sheet. The electric heating furnace resistance tape conducting rod mounting mechanism is improved, the risk of the conducting rod to the ground caused by the mounting mechanism is thoroughly eliminated, electric heating faults are reduced, and labor delay time is shortened; the structure of the conducting rod fixing plate is changed, the sealing performance of the conducting rod is improved, and the atmosphere in the furnace and the process atmosphere in the furnace are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric heating furnace equipment and relates to a conductive rod installation of an electric heating furnace, in particular to a conductive rod installation mechanism of a resistance band of an electric heating furnace. Background Art

[0002] The electric heating section of the non-oriented silicon steel annealing furnace is heated by a resistance belt. The resistance belt passes through the furnace wall through a conductive rod and is connected to the cable from the power control cabinet in the electrical room, thereby ensuring the heating and precise temperature control of the resistance belt.

[0003] The function of the electric heating furnace resistance belt is intact, and the conductive rod is the weakest link and the key part that needs daily maintenance. The conductive rod directly connects the inside and outside of the furnace and is the key part that is most likely to affect the atmosphere in the furnace. Therefore, the installation mechanism of the conductive rod directly affects the production performance of the strip.

[0004] The existing conductive rod installation mechanism has certain defects in its design, and is difficult to maintain. Long-term use can easily cause the conductive rod to touch the ground, causing the electric heating section to be unable to be put into use, resulting in unit downtime. In addition, the existing conductive rods usually have poor sealing properties, which can easily cause abnormal atmosphere in the furnace and affect product quality.

[0005] Specific questions include:

[0006] 1. The existing resistance band conductive rod installation structure has frequent electric heating failures, resulting in long work delays. Due to the original conductive rod installation structure, the conductive rod fixing bolts are inserted into the conductive rod flange and fastened to the fixing plate welded on the furnace shell to fix the flange; the conductive rod fixing bolts and the conductive rod flange are only isolated by the porcelain sleeve. The porcelain sleeve will be damaged due to thermal expansion and contraction, and installation reasons will directly cause the fixing bolts to contact the conductive rod, the conductive rod to the ground, or even catch fire, and there is a risk of burning the electrical control system. It takes a long time to handle such failures.

[0007] 2. The existing resistor strip conductive rod installation structure has poor sealing at the conductive rod installation location, resulting in abnormal furnace atmosphere, which affects the performance of strip steel products. The fixed plate is designed to be flat, and the fixed plate and mica sheet are sealed with asbestos insulation pads. The sealing pad cannot be completely nested in the fixed plate, and the high-temperature deformation of the mica sheet will cause poor sealing, and the atmosphere inside and outside the furnace will penetrate, affecting product quality.

[0008] 3. The existing resistor belt conductive rod installation structure is difficult to maintain and the functional accuracy cannot be guaranteed. In order to ensure the fixation of the conductive rod and the sealing of the furnace body, it is necessary to tighten the fixing bolts. However, since the fixing plate is directly welded to the furnace body, the thread is easily deformed due to long-term high temperature, which makes it impossible to tighten, and thus the functional accuracy of the conductive rod cannot be guaranteed. Utility Model Content

[0009] The utility model aims to provide an installation mechanism for the resistance band conductive rod of an electric heating furnace, which can avoid the risk of fire caused by short circuit of the conductive rod of the electric heating furnace to the ground, and at the same time improve the sealing of the conductive rod installation site.

[0010] The technical solution adopted by the utility model to achieve the above-mentioned purpose is:

[0011] A mounting mechanism for a resistance band conductive rod of an electric heating furnace comprises a fixing plate, a mica insulating sheet, a conductive rod flange sheet and a crimping plate; the fixing plate, the mica insulating sheet, the conductive rod flange sheet and the crimping plate are all annular, a circular hole in the middle of the fixing plate is sleeved with a porcelain bushing of the conductive rod of the electric heating furnace, the fixing plate is welded to a contact surface of a furnace shell of the electric heating furnace, a mica insulating sheet is fixed between the fixing plate and the conductive rod flange sheet, and between the conductive rod flange sheet and the crimping plate; the mica insulating sheet and the conductive rod flange sheet are both sleeved on the conductive rod, and asbestos insulating pads are provided between the fixing plate and the mica insulating sheet, and between the mica insulating sheet and the conductive rod flange sheet.

[0012] The crimping plate is square, and the middle hole diameter of the crimping plate is more than 40mm larger than the diameter of the conductive rod. Fastening bolt holes are processed at the four corners of the crimping plate. One end of the fastening bolt is welded to the furnace shell of the electric heating furnace, and the other end cooperates with the fastening bolt hole to fix the crimping plate.

[0013] A plurality of grooves with different inner diameters are arranged on the contact surface between the fixing plate and the mica insulating sheet, and asbestos insulating pads of different specifications can be nested in the grooves.

[0014] A plurality of grooves with different inner diameters are arranged on the contact surface between the conductive rod flange and the mica insulating sheet, and asbestos insulating pads of different specifications can be nested in the grooves.

[0015] The beneficial effects of the utility model are:

[0016] Eliminates the risk of fire caused by short circuit to ground caused by direct contact between bolts and the flange of the conductive rod;

[0017] It is convenient for the inspection and maintenance of the conductive rod, which greatly reduces the failure rate of the conductive rod of the resistance belt;

[0018] Improves the sealing of the furnace body, ensures the furnace atmosphere, and improves product performance;

[0019] The conductive rod installation mechanism has high operating stability and can be promoted for installation and use in similar electric heating furnace resistance belt conductive rods, and has strong promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the crimping plate in the utility model;

[0022] Figure 3 It is a schematic diagram of the contact surface structure of the fixed plate and the mica insulating sheet in the utility model;

[0023] Figure 4 It is a cross-sectional view of the fixing plate in the utility model;

[0024] Figure 5 It is a schematic diagram of the contact surface structure of the conductive rod flange and the mica insulating sheet in the utility model;

[0025] Figure 6 It is a cross-sectional view of the flange of the conductive rod in the utility model;

[0026] In the figure, 1, fixing plate; 2, mica insulating sheet; 3, flange of conductive rod; 4, crimping plate; 5, porcelain bushing of conductive rod; 6, furnace shell; 7, conductive rod; 8, asbestos insulating pad; 9, fastening bolt hole; 10, fastening bolt; 11, nut; 12, groove 1; 13, groove 2 DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings:

[0028] A mounting mechanism for a resistance band conductive rod of an electric heating furnace, such as Figure 1 As shown, it includes a fixed plate 1, a mica insulating sheet 2, a conductive rod flange 3, and a crimping plate 4; the fixed plate 1, the mica insulating sheet 2, the conductive rod flange 3, and the crimping plate 4 are all annular, the circular hole in the middle of the fixed plate 1 is sleeved with the porcelain bushing 5 of the conductive rod of the electric heating furnace, the contact surface of the fixed plate 1 and the furnace shell 6 of the electric heating furnace is welded, and the mica insulating sheet 2 is fixed between the fixed plate 1 and the conductive rod flange 3, and between the conductive rod flange 3 and the crimping plate 4; the mica insulating sheet 2 and the conductive rod flange 3 are both sleeved on the conductive rod 7, and asbestos insulating pads 8 are provided between the fixed plate 1 and the mica insulating sheet 2, and between the mica insulating sheet 2 and the conductive rod flange 3.

[0029] The crimping plate 4 is square, such as Figure 1 and Figure 2 As shown, the diameter of the middle hole of the crimping plate 4 is more than 40 mm larger than the diameter of the conductive rod, which is convenient for inserting the conductive rod 7. At the same time, when the conductive rod 7 falls and deforms, it will not contact the crimping plate 4 to cause a short circuit to the ground; the four corners of the crimping plate 4 are processed with fastening bolt holes 9, one end of the fastening bolt 10 is directly welded to the furnace shell 6 of the electric heating furnace, and the other end passes through the fastening bolt hole 9 on the crimping plate 4 to cooperate with the nut 11 to fix the crimping plate, thereby fixing the entire installation mechanism, achieving the fixing of the conductive rod 7 and ensuring the sealing effect of the electric heating furnace.

[0030] The contact surface between the fixing plate 1 and the mica insulating sheet 2 is provided with a plurality of grooves 12 with different inner diameters, such as Figure 3 and Figure 4As shown, asbestos insulation pads 8 of different specifications can be nested in the groove 12 to improve the sealing performance between the fixing plate 1 and the mica insulation sheet 2.

[0031] The contact surface between the conductive rod flange 3 and the mica insulating sheet 2 is also provided with a plurality of grooves 13 with different inner diameters, such as Figure 5 and Figure 6 As shown, asbestos insulation pads 8 of different specifications can be nested in the second groove 13 to improve the sealing performance between the conductive rod flange sheet 3 and the mica insulation sheet 2.

Claims

1. An installation mechanism for a resistance band conductive rod of an electric heating furnace, characterized in that: It includes a fixing plate, a mica insulating sheet, a conductive rod flange and a crimping plate; the fixing plate, the mica insulating sheet, the conductive rod flange and the crimping plate are all annular; the hole in the middle of the fixing plate is sleeved with the porcelain bushing of the conductive rod of the electric heating furnace; the contact surface between the fixing plate and the furnace shell of the electric heating furnace is welded; mica insulating sheets are fixed between the fixing plate and the conductive rod flange, and between the conductive rod flange and the crimping plate; the mica insulating sheet and the conductive rod flange are both sleeved on the conductive rod; asbestos insulating pads are provided between the fixing plate and the mica insulating sheet, and between the mica insulating sheet and the conductive rod flange.

2. The electric heating furnace resistance belt conductive rod installation mechanism according to claim 1, characterized in that: The crimping plate is square, and the middle hole diameter of the crimping plate is more than 40mm larger than the diameter of the conductive rod. Fastening bolt holes are processed at the four corners of the crimping plate. One end of the fastening bolt is welded to the furnace shell of the electric heating furnace, and the other end cooperates with the fastening bolt hole to fix the crimping plate.

3. The installation mechanism for the resistance belt conductive rod of an electric heating furnace according to claim 1, characterized in that: A plurality of grooves with different inner diameters are arranged on the contact surface between the fixing plate and the mica insulating sheet, and asbestos insulating pads of different specifications can be nested in the grooves.

4. The electric heating furnace resistance belt conductive rod installation mechanism according to claim 1, characterized in that: A plurality of grooves with different inner diameters are arranged on the contact surface between the conductive rod flange sheet and the mica insulating sheet, and asbestos insulating pads of different specifications can be nested in the grooves.

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