Current balance adjusting device for conductive element of calcium carbide furnace

Abstract

The utility model discloses a calcium carbide furnace conducting element current balance adjusting device, which comprises a transformer, a conducting element and an electrode, a current regulator is sleeved outside the conducting element and comprises a plurality of arc-shaped shells, and the bottom of each arc-shaped shell is fixedly connected with an annular bottom plate. The two ends of the arc-shaped shell are fixedly connected with a male buckle plate and a female buckle plate respectively, and the male buckle plate and the female buckle plate can be buckled with each other. Annular iron cores with the same shape are stacked on the annular bottom plate; the upper end of the arc-shaped shell is fixedly connected with an annular cover plate and is pressed above the annular iron cores; the two ends of the arc-shaped shells are connected end to end, and the annular iron core is formed through buckling of the male buckle plates and the female buckle plates. According to the utility model, under the condition that the load is not increased, the problems of frequent electrode rib piece beating, overburning and the like caused by non-uniform element current distribution can be reduced, and the production efficiency and the equipment stability are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of current balance regulation, in particular to a current balance regulation device for a conductive element of a calcium carbide furnace. Background Art

[0002] Calcium carbide furnaces use electrodes to generate an arc, converting electrical energy into heat to heat the raw materials and produce calcium carbide. The power and efficiency of a calcium carbide furnace directly impact both production and energy consumption. Given constant raw material conditions, practice has shown that the power of a calcium carbide furnace directly influences production. Specifically, higher power yields higher output; conversely, lower power yields lower output.

[0003] In a low-voltage current loop, the current should remain constant everywhere. However, when the current allowed to flow through the equipment is small, it will limit the increase in active power and become a constraint to increasing power.

[0004] On-site current assessments revealed that the conductive elements of Zhonglian's No. 4 calcium carbide furnace were unevenly distributing current. Specific data showed that the three-phase current imbalance coefficient was as high as 1.40 times. Furthermore, there were only 14 sets of these conductive elements, and according to design calculations, the total allowable current of the elements was only 9555*14 / 1.4=95.55kA. On the other hand, the allowable current of the electrodes was 103kA, while the maximum secondary current output by the transformer could reach 120630A. Clearly, the uneven distribution of current by the conductive elements limited the user's ability to further increase the power of the calcium carbide furnace. Therefore, in order to increase the power of the calcium carbide furnace, the imbalance coefficient of the copper tube current must be reduced to achieve a more balanced current distribution. The current balancing adjustment device for the conductive elements of the calcium carbide furnace improves the power and efficiency of the calcium carbide furnace by adjusting the current of each phase in real time, making the current more evenly distributed among the conductive elements. Utility Model Content

[0005] The purpose of the utility model is to provide a current balance regulating device for a conductive element of a calcium carbide furnace, so as to solve the problem of power imbalance in the calcium carbide furnace proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a current balancing and regulating device for the conductive element of a calcium carbide furnace includes a transformer, a conductive element, an electrode, and a current regulator is mounted on the outer surface of the conductive element. The current regulator includes several arc-shaped shells, and the bottom of the arc-shaped shell is fixedly connected to an annular bottom plate. The two ends of the arc-shaped shell are respectively fixedly connected to a male buckle plate and a female buckle plate, and the male buckle plate and the female buckle plate can be buckled with each other; an annular iron core of the same shape is stacked on the annular bottom plate, and the upper end of the arc-shaped shell is fixedly connected to an annular cover plate that is pressed on top of the annular iron core; the two ends of the several arc-shaped shells are connected end to end, and the annular iron core is formed by the buckling of the male buckle plate and the female buckle plate.

[0007] Preferably, the arc-shaped shell is 1 / 3 circular, and the three arc-shaped shells are connected end to end, and a circular iron core is formed by the buckling of the male buckle plate and the female buckle plate.

[0008] Preferably, a plurality of groups of iron cores are fixedly installed in the arc-shaped housing, and the iron cores are composed of silicon steel sheets.

[0009] Preferably, cylindrical grooves are formed at the upper and lower ends of the arc-shaped shell, and the inner end surfaces of the annular bottom plate and the annular cover plate are fixedly connected with three cylindrical protrusions that match the three cylindrical grooves of the arc-shaped shell.

[0010] Preferably, a clamping ring is fixedly connected at the intersection of the side surfaces and inner end surfaces of the annular bottom plate and the annular cover plate.

[0011] Preferably, the clamping ring is made of rubber.

[0012] Compared with the existing technology, the beneficial effects of the present invention are as follows: 1. The installation of the present invention significantly increases the allowable current of the components. This change completely eliminates the bottleneck that restricts the increase of furnace load, that is, the limitation of component current, thus leaving ample room for further increase of load.

[0013] 2. The utility model can help reduce problems such as frequent electrode ribs and overburning caused by uneven current distribution of components without increasing the load, further improving production efficiency and equipment stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of the utility model.

[0015] Figure 2 This is a schematic diagram of the installation of the base plate cover of the utility model.

[0016] Figure 3 This is a schematic diagram of the buckle installation of the utility model.

[0017] Figure 4 This is a schematic diagram of the working position of the utility model.

[0018] In the figure: 1. Arc-shaped shell; 2. Annular cover plate; 3. Annular bottom plate; 4. Iron core; 5. Female buckle plate; 6. Male buckle plate; 7. Protrusion; 8. Groove; 9. Clamping ring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1 The utility model provides a technical solution: a current balancing and regulating device for a conductive element of a calcium carbide furnace, comprising a transformer, a conductive element, an electrode, and a current regulator sheathed on the conductive element. The current regulator comprises several arc-shaped shells 1, the bottom of the arc-shaped shell 1 is fixedly connected to an annular bottom plate 3, and both ends of the arc-shaped shell are respectively fixedly connected to a male buckle plate 6 and a female buckle plate 5, which can be buckled with each other; an annular iron core of the same shape is stacked on the annular bottom plate 3, and the upper end of the arc-shaped shell 1 is fixedly connected to an annular cover plate 2 to press on the annular iron core; the two ends of several arc-shaped shells 1 are connected end to end, and an annular iron core is formed by buckling the male buckle plate 6 and the female buckle plate 5; multiple groups of iron cores 4 are fixedly installed in the arc-shaped shell 1, and the iron core 4 is composed of silicon steel sheets;

[0021] See also Figure 2 , cylindrical grooves 8 are provided at the upper and lower ends of the arc-shaped shell 1, and the inner end surfaces of the annular bottom plate 3 and the annular cover plate 2 are fixedly connected with three cylindrical protrusions 7 that match the three cylindrical grooves 8 of the arc-shaped shell;

[0022] A clamping ring 9 is fixedly connected at the intersection of the side surfaces and inner end surfaces of the annular bottom plate 3 and the annular cover plate 2. The clamping ring 9 is made of rubber.

[0023] See also Figure 3 The arc-shaped shell 1 is 1 / 3 circular, and the three arc-shaped shells 1 are connected end to end, and a circular iron core is formed by the buckle of the male buckle plate 6 and the female buckle plate 5.

[0024] See also Figure 4 The transformer is connected to the electrodes of the calcium carbide furnace through copper tubes, and the current balance regulator is directly installed on the connected copper tubes.

[0025] Working principle:

[0026] First, measure the voltage of each copper tube at its connection to the transformer and the calcium carbide furnace electrode to obtain the voltage drop (U). Simultaneously, measure the current flowing through each copper tube. Combined with the voltage drop measured in the previous step, calculate the impedance (X) of each copper tube. Based on the impedance (X) of each copper tube, calculate the additional impedance required to achieve current balance. Based on the required additional impedance, select and install an appropriate number of current balancing regulators to meet the impedance requirements of each copper tube. Assuming the impedance of each regulator is K, the required number of regulators (N) is determined using the formula: Xtotal = N × K + X. Based on the calculated results, install the appropriate number of current balancing regulators and perform system debugging to ensure even current distribution across all phases. The current balancing regulator's curved housing (1) is mounted on the copper tube by snapping together the male and female snap plates (6 and 5). The mounting is secured by the annular cover (2) and base (3).

[0027] It is estimated that installing 110 regulators on a single furnace can achieve the desired regulation effect. After installation and regulation, the component current imbalance can be reduced from 1.4 to below 1.25.

[0028] After installing the current regulating device, the allowable current of the component is increased from 95.55kA to 107kA. The bottleneck restricting the load increase of the furnace is no longer the component current, which reserves space for increasing the load. Or, without increasing the load, it can reduce the occurrence of frequent electrode ribs and overburning caused by uneven component current distribution.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A current balancing and regulating device for a conductive element of a calcium carbide furnace, comprising a transformer, a conductive element, and an electrode, characterized in that: A current regulator is mounted on the outer surface of the conductive element. The current regulator comprises a plurality of arc-shaped shells (1). The bottom of the arc-shaped shell (1) is fixedly connected to an annular bottom plate (3). The two ends of the arc-shaped shell are respectively fixedly connected to a male buckle plate (6) and a female buckle plate (5). The male buckle plate (6) and the female buckle plate (5) can be buckled with each other. An annular iron core of the same shape is stacked on the annular bottom plate (3). The upper end of the arc-shaped shell (1) is fixedly connected to an annular cover plate (2) and pressed on the top of the annular iron core. The two ends of the plurality of arc-shaped shells (1) are connected end to end, and the annular iron core is formed by buckling the male buckle plate (6) and the female buckle plate (5).

2. The current balance regulating device for a calcium carbide furnace conductive element according to claim 1, characterized in that: The arc-shaped shell (1) is 1 / 3 of a circle, and the three arc-shaped shells (1) are connected end to end, and a circular iron core is formed by fastening the male buckle plate (6) and the female buckle plate (5).

3. The current balance regulating device for a calcium carbide furnace conductive element according to claim 1, characterized in that: Multiple groups of iron cores (4) are fixedly installed in the arc-shaped housing (1), and the iron cores (4) are composed of silicon steel sheets.

4. The current balance regulating device for a calcium carbide furnace conductive element according to claim 1, characterized in that: The upper and lower ends of the arc-shaped shell (1) are provided with cylindrical grooves (8), and the inner end surfaces of the annular bottom plate (3) and the annular cover plate (2) are fixedly connected with three cylindrical protrusions (7) that match the three cylindrical grooves (8) of the arc-shaped shell.

5. The current balance regulating device for a calcium carbide furnace conductive element according to claim 1, characterized in that: A clamping ring (9) is fixedly connected at the intersection of the side surfaces and inner end surfaces of the annular bottom plate (3) and the annular cover plate (2).

6. The current balance regulating device for a calcium carbide furnace conductive element according to claim 5, characterized in that: The clamping ring (9) is made of rubber.

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