Zinc pot emergency power supply system

Abstract

The invention discloses a zinc pot emergency power supply system, which comprises a Scott transformer connected with a power supply through an emergency power supply transformer; the inductor control cabinet is connected with a power supply through a zinc pot transformer; the switching device is connected with the Scott transformer and the inductor control cabinet; and the inductor is connected with the switching device and is arranged on the zinc pot. When the inductor control cabinet breaks down or is not used for a long time, it is guaranteed that the inductor is continuously heated, and the serious consequence that a zinc pot is scrapped due to zinc liquid condensation is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of zinc pot emergency power supply, in particular to a zinc pot emergency power supply system. Background Art

[0002] The core ceramic zinc pot of the continuous hot-dip galvanizing unit has the following main core components: zinc pot body, inductor, control cabinet power supply, etc. The zinc pot is one of the core key equipment of the continuous hot-dip galvanizing unit, and its stable operation is crucial to the entire production line. However, in the actual production process, due to various unforeseen factors, such as power grid fluctuations, equipment failures, etc., the zinc pot power supply system is interrupted, thus affecting the production progress and product quality. In order to solve this problem, the existing technology usually adopts a backup power supply system, such as a diesel generator or an emergency power supply is set in front of the control cabinet to ensure that the zinc pot can continue to work when the main power supply is interrupted. However, these traditional emergency power supply systems have some limitations, such as long startup time, high maintenance cost, and low reliability. In particular, the emergency power supply method in front of the control cabinet cannot solve the risk of power failure of the zinc pot when the control cabinet fails, which not only affects the production progress, but also may cause irreversible damage to the equipment. Therefore, it is particularly important to develop a reliable zinc pot emergency power supply system. Summary of the invention

[0003] In view of the above technical problems, the present invention provides a zinc pot emergency power supply system.

[0004] In order to achieve the above object, the technical solution of the present invention is as follows: Zinc pot emergency power supply system, including: Scott transformer, which is connected to the power supply through the emergency power transformer; An induction body control cabinet, which is connected to the power supply through a zinc pot transformer; Switching device, connected to Scott transformer and inductor control cabinet; The induction body is connected with the switching device and installed on the zinc pot.

[0005] The zinc pot transformer comprises: The zinc pot 1# transformer body and the zinc pot 2# transformer body are respectively connected to a power source.

[0006] The induction body control cabinet comprises: The A inductor control cabinet body and the B inductor control cabinet body are respectively connected to the zinc pot 1# transformer body; The C induction body control cabinet body and the D induction body control cabinet body are respectively connected to the zinc pot 2# transformer body.

[0007] The switching device comprises: A induction body switching cabinet is connected to the A induction body control cabinet body; B induction body switching cabinet is connected to the B induction body control cabinet body; The C induction body switching cabinet is connected to the C induction body control cabinet body; The D induction body switching cabinet is connected to the D induction body control cabinet body; Among them, the A inductor switching cabinet, the B inductor switching cabinet, the C inductor switching cabinet and the D inductor switching cabinet are all connected to the Scott transformer.

[0008] The sensor comprises: A induction body is connected to A induction switching cabinet; The B induction body is connected to the B induction switching cabinet; The C induction body is connected to the C induction switching cabinet; The D induction body is connected to the D induction switching cabinet.

[0009] The beneficial effects of the present invention are: 1. In order to ensure the uniformity of the zinc liquid temperature, the inductors are usually arranged evenly on the inner wall of the pot body in a multi-point distribution manner. The zinc pot is generally equipped with 4 inductors according to different production processes, and the rated power of the inductors is 500KW. Each inductor is precisely adjusted in power through an independent control cabinet to meet the temperature requirements of different production stages.

[0010] 2. The zinc pot emergency power supply system and application method of the continuous hot-dip galvanizing production line of the present invention optimizes the layout structure, adds a manual or automatic switching device, realizes manual or automatic switching of the emergency power supply, and realizes the switching of the emergency power supply behind the control cabinet, ensuring that the zinc pot can be quickly switched to the emergency power supply when the main power supply is interrupted or the control cabinet fails, thereby ensuring production continuity. At the same time, the power supply capacity of the induction body emergency power supply is designed.

[0011] 3. The present invention is implemented by using 4 inductors (taking a single inductor of 500kW as an example), and a manual or automatic switching device is added between the inductor power adjustment control cabinet and the inductor. When the control cabinet fails, the emergency power supply is put into use, which solves the problem of no emergency power supply in the original design under the control cabinet failure, reduces the loss caused by the scrapping and replacement of the inductor, and avoids the risk of long-term production suspension caused by replacing the inductor.

[0012] 4. The emergency power supply of the present invention is switched before the inductor control cabinet. The incoming power supply can be the same as the original incoming power supply voltage level, 3×460V or 3×380V. The incoming power supply of the present invention is set to 3×460V, and the three-phase AC power supply is converted into a two-phase DC power supply through the control cabinet. The manual or automatic switching device of the emergency power supply is set after the inductor control cabinet. The original design of the 50kW emergency power supply capacity can only meet the non-solidification of the inductor molten groove, and cannot meet the on-site zinc pot temperature setting needs. Through actual on-site application, the emergency power supply power supply power of each inductor is set at 110-120kW. Through calculation, the emergency power supply voltage is set at 230V. The emergency power supply converts the three-phase AC power supply into a single-phase power supply to supply power to the inductor by setting a Scott transformer. The inlet and outlet voltages of the Scott transformer are 460V and 280V respectively, meeting the power supply requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0014] Figure 1 It is a schematic diagram of the present invention. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0016] like Figure 1As shown, the zinc pot emergency power supply system includes: Scott transformer 3, which is connected to the power supply through the emergency power supply transformer 1; inductor control cabinet 4, which is connected to the power supply through the zinc pot transformer 2; switching device 5, connected to Scott transformer 3 and inductor control cabinet 4; inductor 6, connected to switching device 5 and installed on zinc pot 7. Zinc pot transformer 2, including: zinc pot 1# transformer 21 body and zinc pot 2# transformer 22 body, which are respectively connected to the power supply. Inductor control cabinet 4, including: A inductor control cabinet body 41 and B inductor control cabinet body 42, respectively connected to zinc pot 1# transformer 21 body; C inductor control cabinet body 43 and D inductor control cabinet body 44, respectively connected to zinc pot 2# transformer 22 body. The switching device 5 includes: an A inductor switching cabinet 51 connected to the A inductor control cabinet body 41; a B inductor switching cabinet 52 connected to the B inductor control cabinet body 42; a C inductor switching cabinet 53 connected to the C inductor control cabinet body 43; and a D inductor switching cabinet 54 connected to the D inductor control cabinet body 44; wherein the A inductor switching cabinet 51, the B inductor switching cabinet 52, the C inductor switching cabinet 53 and the D inductor switching cabinet 54 are all connected to the Scott transformer 3. The inductor 6 includes: an A inductor body 61 connected to the A inductor switching cabinet 51; a B inductor body 62 connected to the B inductor switching cabinet 52; a C inductor body 63 connected to the C inductor switching cabinet 53; and a D inductor body 64 connected to the D inductor switching cabinet 54.

[0017] The present invention changes the structure of the emergency power supply system under the existing emergency power supply conditions, adds a Scott transformer 3, converts the original three-phase 460V emergency power supply into a 280V single-phase power supply, and realizes a mode in which the emergency power supply directly enters the inductor 6 for operation without passing through the inductor control cabinet 4. The application of this mode solves the problem of ensuring continuous heating of the inductor when the inductor control cabinet 4 fails or has not been used for a long time, thereby avoiding the serious consequence of condensation of zinc liquid and the scrapping of the zinc pot.

[0018] In the present invention, an A induction body switching cabinet 51, a B induction body switching cabinet 52, a C induction body switching cabinet 53, and a D induction body switching cabinet 54 are respectively added behind the A induction body control cabinet body 41, the B induction body control cabinet body 42, the C induction body control cabinet body 43, and the D induction body control cabinet body 44. When each induction body 6 uses an emergency power supply, the emergency power supply power is set according to 110-120kW.

[0019] In the present invention, a Scott transformer 3 is added after the emergency power transformer 1. The capacity of the Scott transformer 3 is 630kVA, and the incoming line voltage of the Scott transformer 3 is 460V. The function of the Scott transformer 3 is to convert the three-phase 460V incoming line into a single-phase 280V power supply, and supply power to the A inductor body 61, the B inductor body 62, the C inductor body 63, and the D inductor body 64 respectively through a manual or automatic switching device 5.

[0020] When the normal power supply of the zinc pot 7 is lost, the emergency power supply is switched to the emergency power supply through the manual or automatic switching device 5. Each inductor 6 works at a constant power of 120kW, the zinc pot 7 will continue to heat, and the zinc liquid temperature can reach the temperature required for production. The process can stabilize the zinc liquid temperature by adjusting the strip temperature, avoiding the occurrence of production line shutdown accidents. When the A inductor control cabinet body 51 fails, the A inductor switching cabinet body 41 is switched to the emergency power supply. According to the above, the A inductor body 61 works at a constant power of 120kW, the B inductor body 62, the C inductor body 63, and the D inductor body 64 are controlled by normal power supply, and the zinc pot temperature control is automatically adjusted, which has no impact on production. In the original control method, when the A inductor control cabinet body 51 fails, the emergency power supply cannot be switched, which will cause a serious accident of damage to the inductor.

[0021] Application method: Under normal working conditions, the main power supply provides a stable power supply for the zinc pot 7. When the main power supply fails, the detection device in the induction body control cabinet 4 will immediately detect the fault signal and start the emergency power supply switching program, which can also be set to manual switching. The emergency power supply replaces the main power supply to ensure the normal operation of the zinc pot 7 and avoid production interruptions. At the same time, the induction body control cabinet 4 will send a fault alarm signal to prompt the operator to troubleshoot and repair the fault. Through the above technical content and application method, the present invention can significantly improve the power supply reliability of the zinc pot of the continuous hot-dip galvanizing unit, reduce production losses caused by power interruptions, and thus improve the economic benefits of the entire production line.

[0022] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Zinc pot emergency power supply system, characterized in that: include: A Scott transformer (3) connected to the power supply via the emergency power transformer (1); An induction body control cabinet (4) connected to a power source via a zinc pot transformer (2); A switching device (5) connected to the Scott transformer (3) and the inductor control cabinet (4); The induction body (6) is connected to the switching device (5) and is installed on the zinc pot (7).

2. The zinc pot emergency power supply system according to claim 1, characterized in that: The zinc pot transformer (2) comprises: The zinc pot 1# transformer (21) body and the zinc pot 2# transformer (22) body are respectively connected to a power source.

3. The zinc pot emergency power supply system according to claim 2, characterized in that: The induction body control cabinet (4) comprises: The A inductor control cabinet body (41) and the B inductor control cabinet body (42) are respectively connected to the zinc pot 1# transformer (21) body; The C induction body control cabinet body (43) and the D induction body control cabinet body (44) are respectively connected to the zinc pot 2# transformer (22) body.

4. The zinc pot emergency power supply system according to claim 3, characterized in that: The switching device (5) comprises: A induction body switching cabinet (51), connected to the A induction body control cabinet body (41); A B induction body switching cabinet (52), connected to a B induction body control cabinet body (42); A C induction body switching cabinet (53) connected to a C induction body control cabinet body (43); A D induction body switching cabinet (54) connected to a D induction body control cabinet body (44); The A inductor switching cabinet (51), the B inductor switching cabinet (52), the C inductor switching cabinet (53) and the D inductor switching cabinet (54) are all connected to the Scott transformer (3).

5. The zinc pot emergency power supply system according to claim 4, characterized in that: The inductor (6) comprises: The A inductor body (61) is connected to the A inductor switching cabinet (51); The B inductor body (62) is connected to the B inductor switching cabinet (52); The C induction body (63) is connected to the C induction switching cabinet (53); The D induction body (64) is connected to the D induction switching cabinet (54).

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