Rectification transformation device and rectification system

Abstract

The invention provides a rectification transformation device and a rectification system, and relates to the technical field of graphitization furnace power transmission equipment.The rectification transformation device comprises two rectification transformation units and a control switch, and one rectification transformation unit is configured to be electrically connected with a main circuit of a power transmission busbar; the control switch is arranged on a branch circuit of the power transmission busbar, and the other rectification transformation unit is connected with a main circuit of the power transmission busbar through the branch circuit of the power transmission busbar; according to the rectification and transformation device, the two rectification and transformation units are arranged, and the power transmission power of the graphitization furnace is controlled by controlling the access number of the rectification and transformation units through the switch, so that the rectification and transformation device adapts to the furnace warming state and the rapid heating state of the graphitization furnace. Under the condition that the graphitization furnace needs to be warmed, the main circuit and the branch circuit of the power transmission busbar are disconnected through the disconnecting switch, so that only one rectification transformation unit is electrically connected with the power transmission main circuit of the power transmission busbar, and the graphitization furnace is good in stability and high in safety.

Description

Technical Field

[0001] The present application relates to the technical field of power transmission equipment for graphitization furnaces, and in particular to a rectifier and transformer device and a rectifier system. Background Art

[0002] The rectifier system is a device used for power transmission to the graphitization furnace. When power is transmitted to the graphitization furnace, the rectifier system first transforms the electricity through the transformer, then transmits the electricity to the transmission vehicle through the transmission busbar, and then outputs the electricity to the graphitization furnace from the transmission vehicle.

[0003] In the related art, the output power of the transformer is too high, which causes the graphitization furnace to explode due to excessive reaction in the furnace body at the beginning of the power transmission curve, resulting in insufficient stability and poor safety of the graphitization furnace.

[0004] In view of this, it is necessary to propose a new technical solution to solve the above technical problems. Summary of the invention

[0005] The purpose of the present application is to provide a rectifier and transformer device and a rectifier system, and the graphitization furnace has good stability and strong safety.

[0006] To achieve the above objectives, this application adopts the following technical means:

[0007] A first aspect of the present application provides a rectifying and transforming device, comprising:

[0008] Two rectifying and transforming units, one of which is configured to be electrically connected to the main circuit of the power transmission busbar;

[0009] A control switch is arranged on a branch of the power transmission busbar, and another of the rectifier and transformer units is connected to the main circuit of the power transmission busbar through the branch of the power transmission busbar;

[0010] When the graphitization furnace is heated, the control switch is disconnected to disconnect the main circuit and branch circuit of the power transmission busbar, and one of the rectifier and transformer units is connected to the main circuit of the power transmission busbar.

[0011] Optionally, the rectifier-transformer unit includes a rectifier transformer, a voltage-regulating transformer and a rectifier cabinet, and the rectifier transformer is electrically connected to the voltage-regulating transformer and to the rectifier cabinet.

[0012] Optionally, it also includes an electric short circuit network, which is respectively connected to the rectifier transformer, the rectifier cabinet and the power transmission busbar.

[0013] Optionally, the control switch includes clamping devices arranged in pairs, and an electrical connector is connected between the two clamping devices.

[0014] Optionally, the clamping device includes a cylinder bracket, a driving cylinder and at least one pair of pressure plates, and the pair of pressure plates are arranged opposite to each other; the driving cylinder is arranged in a one-to-one correspondence with the pressure plates and is connected to the pressure plates to drive the pressure plates to move back and forth in a straight line; the driving cylinder is installed on the cylinder bracket.

[0015] The second aspect of the present application provides a rectifier and transformer device, comprising two rectifier and transformer units, one of the rectifier and transformer units is configured to be electrically connected to the main circuit of the power transmission busbar, and the other rectifier and transformer unit is configured to be electrically connected to the branch circuit of the power transmission busbar, and the main circuit and branch circuit of the power transmission busbar are arranged independently of each other.

[0016] A third aspect of the present application provides a rectifier system, comprising a power transmission vehicle, a power transmission busbar, and a rectifier transformer device as described in any one of the above items, wherein the rectifier transformer device is connected to the power transmission busbar, and the power transmission vehicle is used to connect to the power transmission busbar.

[0017] Compared with the prior art, this application brings the following technical effects:

[0018] The rectifier transformer device of the present application controls the power supply of the graphitization furnace by setting two rectifier transformer units and controlling the number of connected rectifier transformer units through a switch to adapt to the warm furnace state and the rapid heating state of the graphitization furnace. When the graphitization furnace needs to be warm, the main circuit and branch circuit of the power transmission busbar are disconnected by disconnecting the switch, so that only one rectifier transformer unit is electrically connected to the main power transmission circuit of the power transmission busbar, and the graphitization furnace has good stability and strong safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A diagram showing a usage scenario of a rectifier and transformer device according to an embodiment of the present application is shown;

[0021] Figure 2 A structural schematic diagram of a rectifier and transformer device according to an embodiment of the present application is shown;

[0022] Figure 3 A schematic diagram of the structure of a control switch according to an embodiment of the present application is shown;

[0023] Figure 4 A schematic diagram of the structure of a power transmission busbar according to an embodiment of the present application is shown;

[0024] Figure 5 A diagram showing a usage scenario of a rectifier and transformer device according to another embodiment of the present application is shown;

[0025] Figure 6 Shows Figure 5 Schematic diagram of the structure of the medium power transmission busbar.

[0026] Description of main component symbols:

[0027] 100-rectifier transformer; 200-power transmission busbar; 210-power transmission main line; 220-power transmission branch line; 230-connecting branch line; 231-branch joint; 300-power transmission car; 400-graphitization furnace;

[0028] 10-rectifier and transformer unit; 11-rectifier transformer; 12-voltage regulating transformer; 13-rectifier cabinet; 20-control switch; 21-pressure plate; 22-driving cylinder; 23-cylinder bracket; 24-electrical connector. DETAILED DESCRIPTION

[0029] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0030] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions.

[0031] In the related art, a high-power transformer is used to supply energy to the graphitization furnace. If the transformer's energy supply power is too large and the furnace body of the graphitization furnace is closed, the reaction in the furnace will produce too much gas in the initial stage of power supply, causing the graphitization furnace to be over-pressurized and burst.

[0032] Example 1

[0033] See also Figure 1 In order to solve the above problems, some embodiments of the present application provide a rectifier-transformer device 100, including two rectifier-transformer units 10 and a control switch 20, wherein one rectifier-transformer unit 10 is configured to be electrically connected to the main circuit of the power transmission bus 200; the control switch 20 is arranged on the branch of the power transmission bus 200, and the other rectifier-transformer unit 10 is connected to the main circuit of the power transmission bus 200 through the branch of the power transmission bus 200;

[0034] When working, the control switch 20 is disconnected to disconnect the main circuit and branch circuit of the power transmission bus 200 , and one of the rectifier and transformer units 10 is connected to the main circuit of the power transmission bus 200 .

[0035] The rectifier transformer device 100 of the present application controls the power transmission of the graphitization furnace 400 by setting two rectifier transformer units 10 and controlling the number of connected rectifier transformer units 10 through a switch to adapt to the warm furnace state and the rapid heating state of the graphitization furnace 400. When the graphitization furnace 400 needs a warm furnace, the main circuit and branch circuit of the power transmission bus 200 are disconnected by disconnecting the switch, so that only one rectifier transformer unit 10 is electrically connected to the main circuit of the power transmission bus 200; in this way, the power received by the graphitization furnace 400 is limited, and the operation is stable and reliable.

[0036] The rectifier transformer 100 is used in a rectifier system, which further includes a power transmission busbar 200 and a power transmission vehicle 300. The power transmission busbar 200 includes a power transmission main path 210 and a power transmission main path 220, a connecting branch 230 is connected between the power transmission main paths 210 and 220, and a control switch 20 is arranged on the connecting branch 230.

[0037] When the graphitization furnace 400 is heated, the power transmission vehicle 300 moves to the power transmission furnace position of the graphitization furnace 400, and the power transmission vehicle 300 is connected to the main line of the power transmission bus 200. The first rectifier and transformer unit 10 outputs AC power, and transmits the AC power to the graphitization furnace 400 through the main line of the power transmission bus 200 and the power transmission vehicle 300 in sequence.

[0038] The output power of a single rectifier transformer unit 10 is configured to be much smaller than the output power of a transformer in the related art, so that the graphitization furnace 400 is in a warm furnace state. In the warm furnace state, the heating speed of the graphitization furnace 400 becomes slow and stable. The graphitization furnace works stably and reliably, and has strong safety performance.

[0039] When the graphitization furnace 400 reaches the temperature, the graphitization furnace 400 is adjusted to a high-speed temperature rise state. The control switch 20 is closed, and the main circuit of the power transmission bus 200 is connected to the branch circuit of the power transmission bus 200 through the connecting branch 230. The alternating current output by the two rectifier and transformer units 10 passes through the power transmission bus 200 and the power transmission car 300 in turn, and then is transmitted to the graphitization furnace 400.

[0040] After the graphitization furnace 400 is quickly heated up, the power transmission vehicle 300 stops connecting with the power transmission busbar 200 , and the rectifying and transforming device 100 stops transmitting power to the graphitization furnace 400 .

[0041] Exemplarily, the power of the transformer in the related art is P1, and the output power of a rectifier transformer device 100 in this embodiment is P2, P1=2P2. In the warm furnace state, the rectifier transformer device 100 has only one rectifier transformer unit 10 connected to the power transmission bus 200, and the AC power is input to the graphitization furnace 400 at P2. In the high-speed heating state, both rectifier transformer units 10 are connected to the power transmission bus 200, and the rectifier transformer 11 has 2P2 input to the graphitization furnace 400. Of course, the rectifier transformer device 100 is not limited to two rectifier transformer units 10, but can also be three or four, which will not be repeated here.

[0042] See also Figure 2 In one specific embodiment, the rectifier-transformer unit 10 includes a rectifier transformer 11, a voltage-regulating transformer 12 and a rectifier cabinet 13. The rectifier transformer 11 is electrically connected to the voltage-regulating transformer 12 and to the rectifier cabinet 13.

[0043] Specifically, a voltage regulating circuit is provided in the voltage regulating transformer 12, and an output terminal is provided on the voltage regulating circuit. A rectifier circuit is provided in the rectifier transformer 11, and an input terminal is provided on the rectifier circuit. The output terminal of the voltage regulating circuit is connected to the input terminal of the rectifier circuit through a conductive aluminum bus. The specific structures of the voltage regulating circuit and the rectifier circuit are both prior arts and will not be described in detail here.

[0044] The rectifier circuit is also provided with a positive output terminal and a negative output terminal. The positive output terminal is connected to the input terminal of one rectifier cabinet 13 through a conductive busbar, and the negative output terminal is connected to the input terminal of another rectifier cabinet 13 through a conductive busbar. Both rectifier cabinets 13 are provided with output terminals, and the output terminals of the rectifier cabinets 13 are connected to the input end of the short-circuit network. The output end of the short-circuit network is further connected to the output end of the short-circuit network.

[0045] When the furnace is warm, the voltage regulating transformer 12 first adjusts the voltage of the external DC current to the actual required voltage, and then transmits it to the rectifier transformer 11. The rectifier transformer 11 and the rectifier cabinet 13 convert the regulated current into AC current through rectification. The AC current is then input into the main power transmission path 210 and the main power transmission path 220 of the power transmission busbar 200 through the short circuit network.

[0046] See also Figure 3 and Figure 4 In one specific embodiment, the control switch 20 includes a pair of clamping devices, and an electrical connector 24 is connected between the clamping devices.

[0047] The connecting branch 230 of the power transmission busbar 200 includes two branch joints 231 disconnected from each other. When the graphitization furnace 400 is heated, the two clamping devices are separated from the branch joints 231 to disconnect the control switch 20. When the graphitization furnace 400 is heated at a high speed, the two clamping devices are clamped on the branch joints 231, and the AC power is input from one branch joint 231, and then transmitted to the other branch joint 231 for output by the electrical connector 24 between the two clamping devices.

[0048] The branch connector 231 is a flat copper sheet, and the contact area between the branch connector 231 and the clamping device is large, and the connection is stable and reliable. The electrical connector 24 is a copper sheet with certain flexibility, which can adaptively deform when the two clamping devices move inconsistently to ensure that the connection between the two clamping devices is stable and reliable.

[0049] In this embodiment, a pair of clamping devices are used as control switches 20 to control the connection or disconnection between the power transmission main path 210 and the power transmission main path 220 of the power transmission busbar 200 , which is simple and reliable to operate.

[0050] In one specific embodiment, the clamping device includes a cylinder bracket 23, a driving cylinder 22 and at least one pair of pressure plates 21, and the pair of pressure plates 21 are arranged opposite to each other; the driving cylinder 22 is arranged in a one-to-one correspondence with the pressure plate 21 and is connected to the pressure plate 21, and is used to drive the pressure plate 21 to move back and forth in a straight line; the driving cylinder 22 is installed on the cylinder bracket 23.

[0051] In this embodiment, the oil cylinder support 23 includes a bottom plate and two pairs of vertical plates spaced apart from each other, the vertical plates are arranged on the bottom plate, and each vertical plate is provided with two driving oil cylinders 22 arranged along its height direction. The output shafts of the two driving oil cylinders 22 are connected to a pressing plate 21. The two driving oil cylinders 22 fixed on the vertical plates of the same oil cylinder support 23 are synchronously arranged to ensure that their output is consistent, so as to improve the stability of the push plate.

[0052] When the graphitization furnace 400 is in a warm furnace state, the driving cylinders 22 on the two vertical plates of the cylinder support 23 respectively drive the two clamping plates to separate, so as to keep the clamping plates and the branch joint 231 isolated from each other. When the graphitization furnace 400 is heated up quickly, the driving cylinders 22 on the two vertical plates of the cylinder support 23 respectively drive the two side surfaces of the branch joint 231 to clamp the branch joint 231.

[0053] The electrical connector 24 is disposed between two push plates of the two clamping mechanisms, and the two push plates are vertical plates of the oil cylinder bracket 23 on the same side.

[0054] Example 2

[0055] See also Figure 1 , Figure 5 and Figure 6Some embodiments of the present application provide a rectifier and transformer device 100, including two rectifier and transformer units 10, one of which is configured to be electrically connected to a main power transmission path 210 of a power transmission busbar 200, and the other rectifier and transformer unit 10 is configured to be electrically connected to a main power transmission path 220 of the power transmission busbar 200, and the main power transmission path 210 and the main power transmission path 220 of the power transmission busbar 200 are independently arranged.

[0056] The rectifying and transformer device 100 is used in a rectifying system, and the rectifying system is used to transmit electricity to the graphitization furnace 400. The rectifying system also includes a power transmission busbar 200 and a power transmission vehicle 300.

[0057] When the graphitization furnace 400 is heated, the power transmission vehicle 300 first moves to the power transmission furnace position of the graphitization furnace 400, and then connects to the power transmission main line 220 of the power transmission busbar 200 and the graphitization furnace 400 respectively, and one of the rectifier transformer units 10 transmits electricity to the graphitization furnace 400 through the power transmission main line 220 of the power transmission busbar 200 and the power transmission vehicle 300 in turn. When the graphitization furnace 400 is rapidly heated, the power transmission vehicle 300 is simultaneously connected to the power transmission main line 210 and the power transmission main line 220 of the power transmission busbar 200, and one of the rectifier transformer units 10 transmits electricity to the graphitization furnace 400 through the power transmission main line 220 of the power transmission busbar 200 and the power transmission vehicle 300, and the other rectifier transformer unit 10 transmits electricity to the graphitization furnace 400 through the power transmission main line 210 of the power transmission busbar 200 and the power transmission vehicle 300.

[0058] The rectifier and transformer device 100 of the present application is provided with two rectifier and transformer units 10, one of which is connected to the main power transmission path 210 of the power transmission busbar 200, and the other rectifier and transformer unit 10 is connected to the main power transmission path 220 of the power transmission busbar 200. When the graphitization furnace 400 is in the warm furnace state, the power transmission vehicle 300 is controlled to only select to be connected to the main power transmission path 210 or the main power transmission path 220, so that there is only one rectifier and transformer unit 10 to transmit power to the graphitization furnace 400, which has high working efficiency and strong safety.

[0059] Example 3

[0060] Please refer again Figure 1 and Figure 4 Some embodiments of the present application provide a rectifier system, including: a power transmission vehicle 300, a power transmission busbar 200 and a rectifier transformer 100 of any of the above items, the rectifier transformer 100 is connected to the power transmission busbar 200, and the power transmission vehicle 300 is used to connect to the power transmission busbar 200.

[0061] The rectifier system is used to supply power to the graphitization furnace 400. In one embodiment, the power transmission main circuit 210 and the power transmission main circuit 220 of the power transmission busbar 200 are connected through a connecting branch 230, and a control switch 20 is provided on the connecting branch 230. The operator can control the number and power of the rectifier transformers 11 connected to the graphitization furnace 400 by controlling the switch 20.

[0062] In the warm furnace state, the control switch 20 is disconnected, the power transmission car 300 is connected to the main power transmission line 210 of the power transmission aluminum bar 200, and one of the rectifier transformer units 10 transmits power to the graphitization furnace 400 through the main power transmission line 210 and the power transmission car 300. In the fast power transmission state, the control switch 20 is closed, the power transmission car 300 is connected to the main power transmission line 210 of the power transmission aluminum bar 200, and one of the rectifier transformer units 10 transmits power to the graphitization furnace 400 through the main power transmission line 210 of the power transmission busbar 200 and the power transmission car 300, and the other rectifier transformer unit 10 transmits power to the graphitization furnace 400 through the power transmission branch line 220 of the power transmission busbar 200 and the power transmission car 300. It should be noted that: whether in the warm furnace state or the fast heating state, the power transmission car 300 is only connected to the main power transmission line 210 of the power transmission busbar 200.

[0063] See also Figure 5 and Figure 6 In another embodiment, the main power transmission path 210 and the main power transmission path 220 of the power transmission busbar 200 are independent of each other. In the warm furnace state, the power transmission vehicle 300 is only connected to the main power transmission path 220, and one of the rectifier transformer units 10 is connected to the power transmission vehicle 300 through the main power transmission path 220; in the rapid heating state, the power transmission vehicle 300 is respectively connected to the main power transmission path 210 and the power transmission branch path 220 of the power transmission busbar 200, and the two rectifier transformer units 10 are respectively connected to the main power transmission path 210 and the power transmission branch path 220.

[0064] The rectifier system of the present application adopts the rectifier transformer device 100 of any of the above-mentioned embodiments, and the rectifier transformer device 100 is provided with two rectifier transformer units 10, one of which is connected to the main power transmission path 210 of the power transmission busbar 200, and the other rectifier transformer unit 10 is connected to the main power transmission path 220 of the power transmission busbar 200. When the graphitization furnace 400 is in the warm furnace state, the power transmission vehicle 300 is controlled to only select to be connected to the main power transmission path 210 or the main power transmission path 220, so that there is only one rectifier transformer unit 10 to transmit power to the graphitization furnace 400, which has high working efficiency and strong safety.

[0065] When the temperature of the graphitization furnace 400 rises rapidly, the two rectifying and transforming units 10 are controlled to transmit electricity to the graphitization furnace through the power transmission vehicle 300 .

[0066] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom still fall within the scope of protection created by this application.

Claims

1. A rectifier and transformer device, characterized in that: include: Two rectifying and transforming units, one of which is configured to be electrically connected to the main circuit of the power transmission busbar; A control switch is arranged on a branch of the power transmission busbar, and another of the rectifier and transformer units is connected to the main circuit of the power transmission busbar through the branch of the power transmission busbar; Among them, in the graphitization furnace temperature furnace state, the control switch is disconnected to disconnect the main circuit and branch circuit of the power transmission busbar, and one of the rectifier and transformer units is connected to the main circuit of the power transmission busbar.

2. The rectifying and transforming device according to claim 1, characterized in that: The rectifier-transformer unit comprises a rectifier transformer, a voltage-regulating transformer and a rectifier cabinet. The rectifier transformer is electrically connected to the voltage-regulating transformer and to the rectifier cabinet.

3. The rectifying and transforming device according to claim 2, characterized in that: It also includes an electric short circuit network, which is respectively connected to the rectifier transformer, the rectifier cabinet and the power transmission busbar.

4. The rectifying and transforming device according to claim 1, characterized in that: The control switch comprises a pair of clamping devices, and an electrical connector is connected between the two clamping devices.

5. The rectifying and transforming device according to claim 4, characterized in that: The clamping device includes a cylinder bracket, a driving cylinder and at least one pair of pressure plates, and the pair of pressure plates are arranged opposite to each other; the driving cylinder is arranged in a one-to-one correspondence with the pressure plates and is connected to the pressure plates to drive the pressure plates to move back and forth in a straight line; the driving cylinder is installed on the cylinder bracket.

6. A rectifier and transformer device, characterized in that: It includes two rectifier and transformer units, one of which is configured to be electrically connected to the main power transmission circuit of the power transmission busbar, and the other rectifier and transformer unit is configured to be electrically connected to the power transmission branch circuit of the power transmission busbar, and the main power transmission circuit and the power transmission branch circuit of the power transmission busbar are arranged independently of each other.

7. A rectifier system, characterized in that: It comprises a power transmission vehicle, a power transmission busbar and the rectifier transformer device according to any one of claims 1 to 6, wherein the rectifier transformer device is connected to the power transmission busbar, and the power transmission vehicle is used to be connected to the power transmission busbar.

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