Heating power supply device of vacuum induction furnace and vacuum induction furnace

Abstract

The utility model provides a heating power supply device of a vacuum induction furnace and the vacuum induction furnace, which belong to the technical field of metallurgical equipment and comprise a heating mechanism and a control power supply cabinet, the heating mechanism comprises at least two independent electric heating mechanisms which are arranged on the outer side wall of a crucible of the vacuum induction furnace in a sleeving manner in the vertical direction; a power connector of each independent electric heating mechanism is arranged outside the vacuum induction furnace; the control power supply cabinet is arranged outside the vacuum induction furnace, and a corresponding control power supply cabinet is arranged corresponding to each independent electric heating mechanism; and a wire outlet end of the control power supply cabinet is connected with a power supply connector of the corresponding independent electric heating mechanism. According to the utility model, the problem that the existing silicon controlled rectifier or IGBT power supply cannot meet the high-power requirement under the condition that the power of a single furnace needs to be higher in the actual application of the vacuum induction furnace in the prior art can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to metallurgical equipment technical field more specifically, relates to a kind of heating power supply device of vacuum induction furnace and vacuum induction furnace. BACKGROUND

[0002] Industrial applications generally need high-power vacuum power supply, the maximum power of current vacuum induction power supply is about 12500KW, but, voltage should not exceed 950-1250V, voltage is too large to occur glow discharge, so that equipment cannot work normally, while power increases to cause current to increase rapidly and exceed the limit of induction copper pipe, and, when vacuum voltage is higher than 950 volts, vacuum corona or interelectrode fire phenomenon occurs, thereby greatly limit the large-scale of vacuum power supply.

[0003] At present, in the actual application of vacuum induction furnace, for the case that single furnace power is required to be greater, the thyristor or IGBT power supply in the prior art cannot meet the high-power requirement.

[0004] It should be noted that: the information disclosed in the above background section is only used to strengthen the understanding of the background of the utility model, so it can include information that does not constitute prior art known to those skilled in the art. INVENTION CONTENTS

[0005] In view of the above problems, the purpose of the utility model is to provide a kind of heating power supply device of vacuum induction furnace, to solve the problem in prior art, in the actual application of vacuum induction furnace, for the case that single furnace power is required to be greater, the existing thyristor or IGBT power supply cannot meet the high-power requirement.

[0006] The utility model provides a kind of heating power supply device of vacuum induction furnace, including heating mechanism and control power cabinet;Wherein,

[0007] The heating mechanism includes at least two independent electric heating mechanisms arranged on the outer side wall of the crucible of the vacuum induction furnace in the vertical direction;The power connector of each independent electric heating mechanism is arranged outside the vacuum induction furnace;

[0008] The control power cabinet is arranged outside the vacuum induction furnace, and a corresponding control power cabinet is provided for each independent electric heating mechanism;The outgoing line end of the control power cabinet is connected with the power connector of the corresponding independent electric heating mechanism.

[0009] In addition, the preferred scheme is that the independent electric heating mechanism includes one single IGBT or at least two parallel single IGBTs or at least two series single IGBTs.

[0010] In addition, preferably, the independent electric heating mechanism comprises one silicon controlled vacuum power induction coil or at least two silicon controlled vacuum power induction coils in parallel or at least two silicon controlled vacuum power induction coils in series.

[0011] In addition, preferably, a magnetic yoke is arranged outside the silicon controlled vacuum power induction coil.

[0012] In addition, preferably, when the independent electric heating mechanism comprises at least two silicon controlled vacuum power induction coils in parallel or at least two silicon controlled vacuum power induction coils in series, the output impedance of each silicon controlled vacuum power induction coil to the corresponding control power cabinet is the same.

[0013] In addition, preferably, when the independent electric heating mechanism comprises at least two silicon controlled vacuum power induction coils in parallel or at least two silicon controlled vacuum power induction coils in series, the diameters of each silicon controlled vacuum power induction coil are equal.

[0014] In addition, preferably, a water-cooled cable is connected at the joint of the independent electric heating mechanism; one end of the water-cooled cable not connected with the independent electric heating mechanism is provided as a power supply joint of the independent electric heating mechanism.

[0015] In addition, preferably, the control power cabinet comprises a cabinet body and a transformer, a rectifier and an inverter arranged inside the cabinet body; the transformer is connected with a power transmission line, the rectifier is connected with the transformer, the inverter is connected with the rectifier, and an outgoing line end is connected at the output side of the inverter.

[0016] In addition, preferably, a switch is arranged between the rectifier and the transformer.

[0017] The utility model also provides a vacuum induction furnace, including vacuum jar, with the vacuum hole of vacuum jar is connected with vacuum system and is arranged in the crucible of vacuum jar inside, and the heating power supply device of vacuum induction furnace as mentioned above.

[0018] From the above technical solutions can be known, the heating power supply device and the vacuum induction furnace of the utility model, through the at least two independent electric heating mechanisms of vertical direction arrangement sleeve setting on the crucible outer lateral wall of the vacuum induction furnace, and the corresponding independent control power cabinet is arranged in the outside of the vacuum induction furnace, and each independent electric heating mechanism is provided with corresponding independent control power cabinet, the outlet end of the control power cabinet is connected with the power connection of the corresponding independent electric heating mechanism, the scheme design makes multiple independent electric heating mechanisms commonly constitute a total heating power supply, can satisfy the demand of the high power supply of the vacuum induction furnace, effectively solves the problem of the vacuum corona discharge caused by the too high power voltage in the prior art, can satisfy the technical requirement of the current limiting of the induction coil copper pipe, and the independent electric heating mechanism can be respectively lifted out of the vacuum induction furnace during installation and removal, so that installation, disassembly and maintenance are facilitated, and the heating process can be optimized by controlling the corresponding independent electric heating mechanism through the control power cabinet. BRIEF DESCRIPTION OF DRAWINGS

[0019] Other objects and advantages of the present application will become more apparent and readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0020] Figure 1 FIG. 1 is a structural schematic diagram of a vacuum induction furnace heating power supply according to an embodiment of the present application;

[0021] Figure 2 FIG. 2 is a structural schematic diagram of a vacuum induction furnace heating power supply according to another embodiment of the present application;

[0022] Figure 3 FIG. 3 is a schematic diagram of a vacuum induction furnace heating power supply according to an embodiment of the present application;

[0023] Figure 4 FIG. 4 is a configuration flow chart of a vacuum induction furnace heating power supply according to an embodiment of the present application.

[0024] In the drawings, 1 - independent electric heating mechanism, 2 - control power cabinet, 21 - transformer, 22 - rectifier, 23 - inverter, 24 - switch, 31 - crucible, 32 - vacuum space, 33 - vacuum tank, 34 - vacuum system, 35 - feeding channel, 4 - water-cooled cable, 5 - power transmission line.

[0025] The same reference numerals in all the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0026] In the following description, for the purpose of providing a comprehensive understanding of one or more embodiments, numerous specific details are set forth. It is apparent, however, to one skilled in the art that these embodiments can be practiced without these specific details.

[0027] In view of the prior art mentioned above, in the actual application of the vacuum induction furnace, for the case that the single furnace power is required to be greater, the existing thyristor or IGBT power supply cannot meet the problem of large power requirement, and a heating power supply device of a vacuum induction furnace and the vacuum induction furnace are provided.

[0028] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0029] In order to illustrate the heating power supply device of the vacuum induction furnace and the vacuum induction furnace provided by the present application, Figure 1 The structure of the vacuum induction furnace heating power supply according to the embodiment of the present application is shown; Figure 2 The structure of the vacuum induction furnace heating power supply according to another embodiment of the present application is shown; Figure 3 The principle of the vacuum induction furnace heating power supply according to the embodiment of the present application is shown; Figure 4 The configuration process of the vacuum induction furnace heating power supply according to the embodiment of the present application is shown.

[0030] As Figures 1 to 3 The heating power supply device of the vacuum induction furnace provided by the present application, as shown in the drawings, comprises a heating mechanism and a control power cabinet 2; wherein,

[0031] The heating mechanism comprises at least two independent electric heating mechanisms 1 arranged in the vertical direction and sleeved on the outer sidewall of the crucible 31 of the vacuum induction furnace; the power connector of each independent electric heating mechanism 1 is arranged outside the vacuum induction furnace;

[0032] The control power cabinet 2 is arranged outside the vacuum induction furnace, and a corresponding control power cabinet 2 is arranged corresponding to each independent electric heating mechanism 1; the outgoing line end of the control power cabinet 2 is connected with the power connector of the corresponding independent electric heating mechanism 1.

[0033] It is to be noted that the main structure of the vacuum induction furnace in the utility model is a mature structure in the prior art, which comprises a vacuum tank 33, a vacuum connecting hole is formed on the vacuum tank 33, and the vacuum tank 33 is connected with a vacuum system 34, so that a vacuum space 32 is formed in the vacuum tank 33. A crucible 31 is arranged in the vacuum space 32, and an electric heating mechanism is arranged outside the crucible 31 to make the crucible 31 have a heating function. In the prior art, a whole heating power supply (silicon controlled rectifier or IGBT power supply) is connected outside the crucible 31 to heat the crucible 31. Due to the limitation of vacuum voltage, the vacuum power supply is limited in size. For the case that a single furnace power is required to be larger, the silicon controlled rectifier or IGBT power supply in the prior art cannot meet the requirement of high power. Therefore, the utility model applies several mature and safe independent power supplies (independent electric heating mechanisms) to the crucible 31 to form a vacuum large power supply to meet the requirement of industrial application. A vertical feeding channel 35 is arranged on the inner side wall of the crucible 31 to add raw materials from the outside to the inside of the crucible 31.

[0034] The at least two independent electric heating mechanisms 1 are arranged on the outer side wall of the crucible 31 of the vacuum induction furnace in the vertical direction, and the corresponding independent control power supply cabinet 2 is arranged outside the vacuum induction furnace and corresponds to each independent electric heating mechanism 1. The outlet end of the control power supply cabinet 2 is connected with the power connection of the corresponding independent electric heating mechanism 1. The design scheme makes the plurality of independent electric heating mechanisms 1 jointly form a total heating power supply, can meet the requirement of the large power supply of the vacuum induction furnace, effectively solves the problem of vacuum corona discharge caused by the excessively high power voltage in the prior art, can meet the technical requirement of current limiting of the copper pipe of the induction coil, and can be lifted out of the vacuum induction furnace during installation and removal, so that installation, removal and maintenance are facilitated. The independent electric heating mechanism can also be independently controlled by the control power supply cabinet according to the requirement of the heating process, so that the heating process is optimized.

[0035] As a preferred scheme of the utility model, the independent electric heating mechanism comprises one single IGBT or at least two parallel single IGBTs or at least two series single IGBTs.

[0036] Specifically, the single IGBT in the utility model refers to an IGBT high-frequency induction heating module, and the single structure is a mature application in the prior art. In the utility model, one single IGBT can be used as the independent electric heating mechanism 1, or a plurality of single IGBTs can be connected in series or parallel to be used as the independent electric heating mechanism 1, and the utility model does not make special limitation on this.

[0037] As an optimal scheme of the utility model, the independent electric heating mechanism 1 includes one silicon controlled vacuum power source induction coil or at least two silicon controlled vacuum power source induction coils in parallel or at least two silicon controlled vacuum power source induction coils in series.

[0038] Specifically, the single silicon controlled vacuum power source induction coil is a mature application in the prior art, and in the utility model, one silicon controlled vacuum power source induction coil can be used as the independent electric heating mechanism 1, or a plurality of silicon controlled vacuum power source induction coils can be connected in series or in parallel to be used as the independent electric heating mechanism 1, and the utility model does not make special limitation on this.

[0039] It should be noted that: no matter whether the independent electric heating mechanism 1 is a single IGBT or a silicon controlled vacuum power source induction coil, or a combination of a single IGBT and a silicon controlled vacuum power source induction coil, the specific number, connection mode and power of the single IGBT or the silicon controlled vacuum power source induction coil can be different or the same for different independent electric heating mechanisms 1, and the number of the independent electric heating mechanisms 1 can be determined according to actual needs, and the utility model does not make special limitation on this, for example, as shown in Figure 1 and Figure 2 , in Figure 1 , the number of the single IGBT or the silicon controlled vacuum power source induction coil included in each independent electric heating mechanism 1 is the same, and in Figure 2 , the number of the single IGBT or the silicon controlled vacuum power source induction coil included in the independent electric heating mechanism 1 is different.

[0040] As an optimal scheme of the utility model, a magnetic yoke is arranged outside the silicon controlled vacuum power source induction coil.

[0041] Specifically, a corresponding magnetic yoke can be additionally arranged outside the induction coil to prevent personnel injury and reactive power loss caused by magnetic leakage of the induction coil.

[0042] As an optimal scheme of the utility model, when the independent electric heating mechanism 1 includes at least two silicon controlled vacuum power source induction coils in parallel or at least two silicon controlled vacuum power source induction coils in series, the output impedance of each silicon controlled vacuum power source induction coil to the corresponding control power cabinet is the same.

[0043] Specifically, the output impedance of each independent electric heating mechanism 1 to the corresponding induction coil is the same or similar, so that the independent electric heating mechanism 1 uniformly heats the crucible 31.

[0044] As an optimal scheme of the utility model, when the independent electric heating mechanism includes at least two silicon controlled vacuum power source induction coils in parallel or at least two silicon controlled vacuum power source induction coils in series, the diameters of each silicon controlled vacuum power source induction coil are equal.

[0045] This further ensures that the independent electric heating mechanism 1 heats the crucible 31 evenly.

[0046] As a preferred embodiment of this utility model, a water-cooled cable 4 is connected to the connector of the independent electric heating mechanism 1; the end of the water-cooled cable 4 that is not connected to the independent electric heating mechanism 1 is set as the power connector of the independent electric heating mechanism 1.

[0047] Specifically, each independent electric heating mechanism 1 can be directly connected to the vacuum sealing flange plate on the wall of the vacuum tank 33 and led out to the outside of the vacuum tank 33 under the atmosphere, or it can be connected to the vacuum sealing flange plate on the side wall of the vacuum tank 33 via a water-cooled cable 4 and led out to the outside of the vacuum tank 33 under the atmosphere. Both methods are acceptable, and this utility model does not make any special limitation on this.

[0048] As a preferred embodiment of this utility model, the control power cabinet 2 includes a cabinet and a transformer 21, a rectifier 22 and an inverter 23 disposed inside the cabinet; wherein, the transformer 21 is connected to the transmission line 5, the rectifier 22 is connected to the transformer 21, the inverter 23 is connected to the rectifier 22, and an output terminal is connected to the output side of the inverter 23.

[0049] Specifically, the power cabinet 2 described above in this utility model is a power cabinet structure based on the control power cabinet 2, and each control power cabinet 2 can individually control the corresponding independent electric heating mechanism 1.

[0050] As a preferred embodiment of this utility model, a switch 24 is provided between the rectifier 22 and the transformer 21. The switch 24 facilitates power transmission control.

[0051] The vacuum induction furnace provided by this utility model includes a vacuum tank 33, a vacuum system 34 connected to the vacuum port of the vacuum tank 33, and a crucible 31 disposed inside the vacuum tank 33; as well as a heating power supply device for the vacuum induction furnace as described above.

[0052] like Figure 4 As shown, the configuration process of the vacuum induction furnace heating power supply provided by this utility model includes the following steps:

[0053] Step S1: At least two independent electric heating mechanisms 1 are arranged vertically on the outer wall of the crucible 3 of the vacuum induction furnace;

[0054] Step S2: Lead the power connector of each independent electric heating mechanism 1 arranged on the outer wall of the crucible 31 to the outside of the vacuum space 32 of the vacuum induction furnace, and set a corresponding control power cabinet 2 for each independent electric heating mechanism 1 outside the vacuum induction furnace.

[0055] Step S3: Connect the power connector of each independent electric heating mechanism 1 to the output terminal of the corresponding control power cabinet 2 to complete the power configuration of the vacuum induction furnace.

[0056] The heating power supply of the vacuum induction furnace heats the heating position of the vacuum induction furnace, and based on the preset heating process requirement, the corresponding independent electric heating mechanism 1 is independently controlled by the power supply cabinet 2 until the heating process of the vacuum induction furnace is completed.

[0057] As can be seen from the above specific embodiments, the heating power supply device of the vacuum induction furnace and the vacuum induction furnace provided by the utility model, through the at least two independent electric heating mechanisms arranged in the vertical direction and sleeved on the outer sidewall of the crucible of the vacuum induction furnace, and the corresponding independent control power supply cabinet arranged outside the vacuum induction furnace and corresponding to each independent electric heating mechanism, the scheme design that the outgoing line end of the control power supply cabinet is connected with the power connection of the corresponding independent electric heating mechanism, makes multiple independent electric heating mechanisms commonly constitute a total heating power supply, can satisfy the demand of high-power power supply of the vacuum induction furnace, effectively solves the problem of vacuum corona discharge due to too high power voltage in the prior art, can satisfy the technical requirement of current limiting of the induction coil copper pipe, and when installation and removal, the independent electric heating mechanism can be respectively lifted out of the vacuum induction furnace, so that installation, removal and maintenance are facilitated, and the heating process requirement can be satisfied, the corresponding independent electric heating mechanism is independently controlled by the control power supply cabinet, so that the heating process is optimized.

[0058] The heating power supply device of the vacuum induction furnace and the vacuum induction furnace according to the utility model are described above with reference to the drawings in an exemplary manner. However, it should be understood by those skilled in the art that various improvements can be made to the above-mentioned heating power supply device of the vacuum induction furnace and the vacuum induction furnace according to the utility model without departing from the content of the utility model. Therefore, the protection scope of the utility model should be determined by the content of the appended claims.

Claims

1. A heating power supply device for a vacuum induction furnace, characterized in that, The heating mechanism and the control power cabinet are included, wherein, the heating mechanism includes at least two independent electric heating mechanisms arranged on the outer sidewall of the crucible of the vacuum induction furnace in the vertical direction; the power connection of each independent electric heating mechanism is arranged outside the vacuum induction furnace; the control power cabinet is arranged outside the vacuum induction furnace, and a corresponding control power cabinet is arranged for each independent electric heating mechanism; the outgoing line end of the control power cabinet is connected with the power connection of the corresponding independent electric heating mechanism.

2. The heating power supply device of the vacuum induction furnace according to claim 1, wherein, the independent electric heating mechanism includes one single IGBT or at least two parallel single IGBTs or at least two series single IGBTs.

3. The heating power supply device of the vacuum induction furnace according to claim 1, wherein, the independent electric heating mechanism includes one silicon controlled vacuum power induction coil or at least two parallel silicon controlled vacuum power induction coils or at least two series silicon controlled vacuum power induction coils.

4. The heating power supply device of the vacuum induction furnace according to claim 3, wherein, a magnetic yoke is arranged outside the silicon controlled vacuum power induction coil.

5. The heating power supply device of the vacuum induction furnace according to claim 3, wherein, when the independent electric heating mechanism includes at least two parallel silicon controlled vacuum power induction coils or at least two series silicon controlled vacuum power induction coils, the output impedance of each silicon controlled vacuum power induction coil to the corresponding control power cabinet is the same.

6. The heating power supply device of the vacuum induction furnace according to claim 3, wherein, when the independent electric heating mechanism includes at least two parallel silicon controlled vacuum power induction coils or at least two series silicon controlled vacuum power induction coils, the diameters of each silicon controlled vacuum power induction coil are equal.

7. The heating power supply device of the vacuum induction furnace according to claim 1, wherein, a water-cooled cable is connected at the connection of the independent electric heating mechanism; one end of the water-cooled cable not connected with the independent electric heating mechanism is arranged as the power connection of the independent electric heating mechanism.

8. The heating power supply device of the vacuum induction furnace according to claim 1, wherein, the control power cabinet includes a cabinet body and a transformer, a rectifier and an inverter arranged inside the cabinet body; wherein the transformer is connected with a power transmission line, the rectifier is connected with the transformer, the inverter is connected with the rectifier, and an outgoing line end is connected at the output side of the inverter.

9. The heating power supply device of the vacuum induction furnace according to claim 8, wherein, a switch is arranged between the rectifier and the transformer.

10. A vacuum induction furnace comprising a vacuum tank, a vacuum system connected to a vacuum hole of the vacuum tank, and a crucible provided inside the vacuum tank; characterized by, The heating power supply device of the vacuum induction furnace according to any one of claims 1-9 is also included.

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