Electroslag casting device

Abstract

The invention provides an electroslag casting device, and relates to the technical field of electroslag casting. In the electroslag casting device, the high-voltage winding of the transformer receives the three-phase alternating current, and the low-voltage winding of the transformer outputs the single-phase alternating current, that is, the electroslag casting device utilizes the three-phase alternating current, so that the electroslag casting device can improve the phase balance degree of the three-phase alternating current. Besides, as the center tap of the low-voltage winding is connected with the bottom of the electroslag casting furnace, namely, the connecting line between the center tap and the bottom of the electroslag casting furnace is used as the neutral line, if the short leg phenomenon occurs on the first consumable electrode or the second consumable electrode, the low-voltage winding can be used as the neutral line. The neutral line can absorb the unbalanced current between the first consumable electrode and the second consumable electrode to a certain extent, so that the unbalance degree of consumable electrode melting can be reduced. In conclusion, the electroslag casting device not only can improve the phase balance degree of the three-phase alternating current, but also can reduce the unbalance degree of consumable electrode melting.

Description

Technical Field

[0001] The present invention relates to the technical field of electroslag casting, and particularly to an electroslag casting device. Background Art

[0002] Electroslag casting is a special casting method that combines electroslag refining and casting forming. Currently, electroslag casting is divided into a single-phase power supply mode and a three-phase power supply mode according to the power supply method. In the single-phase power supply mode, any two phases of the three-phase alternating current of the power grid form a single-phase power supply loop after being stepped down by a transformer. In the three-phase power supply mode, the three-phase alternating current of the power grid forms a three-phase power supply loop through a three-phase transformer or three single-phase transformers used in parallel.

[0003] However, since the single-phase power supply mode only utilizes any two phases of the three-phase alternating current, it may cause phase imbalance of the power grid. In addition, since the three-phase power supply mode includes at least three consumable electrodes, that is, the melting speeds of the respective consumable electrodes may vary, it is easy to cause uneven melting of the consumable electrodes, that is, it is easy to trigger the "short leg" phenomenon of the consumable electrodes.

[0004] Therefore, how to improve the degree of phase balance of the three-phase alternating current and reduce the degree of imbalance of the melting of the consumable electrodes is a technical problem to be solved urgently. Summary of the Invention

[0005] In view of this, the present invention provides an electroslag casting device to improve both the degree of phase balance of the three-phase alternating current and the degree of imbalance of the melting of the consumable electrodes.

[0006] To achieve the above object, the embodiments of the present invention provide the following technical solutions:

[0007] The present application provides an electroslag casting device, including: a transformer, an electroslag casting furnace, N first consumable electrodes, and N second consumable electrodes; N is a positive integer; wherein:

[0008] The high-voltage winding of the transformer receives three-phase alternating current, and the low-voltage winding of the transformer outputs single-phase alternating current;

[0009] The N first consumable electrodes and the N second consumable electrodes are both arranged in the electroslag casting furnace;

[0010] The N first consumable electrodes are connected to the first end of the low-voltage winding, and the N second consumable electrodes are connected to the second end of the low-voltage winding;

[0011] The center tap of the low-voltage winding is connected to the bottom of the electroslag casting furnace.

[0012] Optionally, it further includes: a first switch, a second switch, and at least one third switch; wherein:

[0013] The bottom of the electroslag casting furnace is connected to the center tap through the first switch;

[0014] The bottom of the electroslag casting furnace is connected to the second end of the low-voltage winding through the second switch;

[0015] The number of the third switches is equal to N, and the N second consumable electrodes correspond to the N third switches one by one. The second consumable electrodes are connected to the second end of the low-voltage winding through the corresponding third switches;

[0016] Or,

[0017] The number of the third switches is equal to 1. The N second consumable electrodes are connected to one end of the third switch, and the other end of the third switch is connected to the second end of the low-voltage winding;

[0018] When the single-electrode melting function of the electroslag casting device is enabled, the first switch and all the third switches are in the off state, and the second switch is in the on state.

[0019] Optionally, it further includes: a fourth switch and at least one fifth switch; wherein:

[0020] The bottom of the electroslag casting furnace is connected to the first end of the low-voltage winding through the fourth switch;

[0021] The number of the fifth switches is equal to N, and the N first consumable electrodes correspond to the N fifth switches one by one. The first consumable electrodes are connected to the first end of the low-voltage winding through the corresponding fifth switches;

[0022] Or,

[0023] The number of the fifth switches is equal to 1. The N first consumable electrodes are connected to one end of the fifth switch, and the other end of the fifth switch is connected to the first end of the low-voltage winding;

[0024] When the single-electrode melting function of the electroslag casting device is enabled, the first switch and all the third switches are in the off state, the second switch and all the fifth switches are in the on state, or the first switch and all the fifth switches are in the off state, and the fourth switch and all the third switches are in the on state.

[0025] Optionally, it further includes: N clamping structures and N supporting structures; wherein:

[0026] The N clamping structures and the N supporting structures correspond to each other one by one, and the clamping structures are installed through the corresponding supporting structures of themselves.

[0027] The N clamping structures and the N first consumable electrodes correspond to each other one by one, and the N clamping structures and the N second consumable electrodes correspond to each other one by one. The clamping structures are used to clamp the corresponding first consumable electrode and the corresponding second consumable electrode of themselves respectively.

[0028] Optionally, the clamping structure includes: at least two chucks; where:

[0029] Each of the chucks is longitudinally arranged.

[0030] Optionally, the clamping structure further includes: at least one insulating structure and at least two conductive structures; where:

[0031] An insulating structure is arranged between any two adjacent chucks.

[0032] Each of the chucks and each of the conductive structures correspond to each other one by one, and the chuck realizes the electrical connection of the electrode clamped by itself through the corresponding conductive structure of itself.

[0033] Optionally, the first connection and the second connection cross each other, and the third connection and the second connection cross each other.

[0034] The first connection is the connection between the first connection point and the first end of the low-voltage winding; N is greater than 1, the first connection point is the connection point of the N first consumable electrodes, and N is equal to 1, the first connection point is the connection end of the first consumable electrode.

[0035] The second connection is the connection between the bottom of the electroslag casting furnace and the center tap.

[0036] The third connection is the connection between the second connection point and the second end of the low-voltage winding; N is greater than 1, the second connection point is the connection point of the N second consumable electrodes, and N is equal to 1, the second connection point is the connection end of the second consumable electrode.

[0037] Optionally, the low-voltage side of the transformer is provided with P first output terminals, P second output terminals, P third output terminals and P fourth output terminals; P is a positive integer; where:

[0038] P first output terminals and P second output terminals are arranged alternately. The P first output terminals are connected to the first connection point, and the P second output terminals are connected to the bottom of the electroslag casting furnace; the P first output terminals are connected to the first end of the low-voltage winding, and the P second output terminals are connected to the center tap;

[0039] P third output terminals and P fourth output terminals are arranged alternately. The P third output terminals are connected to the second connection point, and the P fourth output terminals are connected to the bottom of the electroslag casting furnace; the P third output terminals are connected to the second end of the low-voltage winding, and the P fourth output terminals are connected to the center tap.

[0040] Optionally, the length of the first consumable electrode is greater than the length of the second consumable electrode;

[0041] Or,

[0042] the length of the second consumable electrode is greater than the length of the first consumable electrode.

[0043] Optionally, the transformer is a T-type transformer.

[0044] As can be seen from the above technical solutions, the present invention provides an electroslag casting device. In this electroslag casting device, since the high-voltage winding of the transformer receives three-phase alternating current and the low-voltage winding of the transformer outputs single-phase alternating current, that is, this electroslag casting device utilizes three-phase alternating current, so this electroslag casting device can improve the phase balance degree of the three-phase alternating current. In addition, since the center tap of the low-voltage winding of the transformer is connected to the bottom of the electroslag casting furnace, that is, the connection line between the center tap of the low-voltage winding of the transformer and the bottom of the electroslag casting furnace is used as the neutral line, so if the "short leg" phenomenon occurs in the first consumable electrode or the second consumable electrode, the connection line between the center tap of the low-voltage winding of the transformer and the bottom of the electroslag casting furnace can absorb the unbalanced current between the first consumable electrode and the second consumable electrode to a certain extent, so that this electroslag casting device can reduce the unbalanced degree of the melting of the consumable electrode. To sum up, this electroslag casting device can not only improve the phase balance degree of the three-phase alternating current, but also reduce the unbalanced degree of the melting of the consumable electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0046] Figures 1 - 6 Structural schematic diagrams of six implementation manners of the electroslag casting device provided by embodiments of the present application respectively;

[0047] Figure 7 Front view of the clamping structure provided by an embodiment of the present application;

[0048] Figure 8 Top view of the clamping structure provided by an embodiment of the present application;

[0049] Figure 9 Structural schematic diagram of another implementation manner of the electroslag casting device provided by an embodiment of the present application. Specific implementation manners

[0050] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application.

[0051] In the present application, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0052] In order to improve the phase balance degree of three-phase alternating current and reduce the imbalance degree of the melting of the consumable electrode, an embodiment of the present application provides an electroslag casting device, and its specific structure can be seen in Figure 1 ( Figure 1 only shown by taking N = 1 as an example) or Figure 2 ( Figure 2 only shown by taking N = 2 as an example), and specifically includes: a transformer 10, an electroslag casting furnace 20, N first consumable electrodes 30 and N second consumable electrodes 40. Wherein, N is a positive integer. The specific structure of the electroslag casting device is described as follows:

[0053] The high-voltage winding 11 of the transformer 10 receives three-phase alternating current A, B, and C, and the low-voltage winding 12 of the transformer 10 outputs single-phase alternating current, that is, the transformer 10 converts three-phase alternating current into single-phase alternating current.

[0054] In a specific example, such as Figure 1 or Figure 2 as shown, the transformer 10 is a T-type transformer, and the T-type transformer is a three-phase AC transformer manufactured using the Kostel connection principle.

[0055] It should be noted that the T-type transformer is already very mature in the prior art, and no detailed description will be given here.

[0056] The above example only shows a specific implementation manner of the transformer 10. In actual applications, including but not limited to this, as long as the transformer 10 that can convert three-phase alternating current into single-phase alternating current is within the protection scope of this application, no specific limitation is made here and it can be determined according to the specific situation.

[0057] N first consumable electrodes 30 and N second consumable electrodes 40 are both arranged in the electroslag casting furnace 20.

[0058] In actual applications, the value of N can be selected according to the shape requirements of the casting, and no specific limitation is made here. For example, if the cross-sectional area of the casting is relatively small, then N can be equal to 1, that is, 2-electrode melting is realized. If the cross-sectional area of the casting is relatively large, then N can be equal to 2, 3, or 4, etc., that is, 4-electrode melting, 6-electrode melting, or 8-electrode melting, etc. are realized.

[0059] Since N can be equal to 1, the electroslag casting device can be applied to the production of castings with simple shapes. In addition, since N can be greater than 1, the electroslag casting device can also be applied to the production of complex castings. In summary, the electroslag casting device can be applied to both the production of castings with simple shapes and the production of complex castings.

[0060] The N first consumable electrodes 30 are connected to the first end a of the low-voltage winding 12 of the transformer 10, the N second consumable electrodes 40 are connected to the second end x of the low-voltage winding 12 of the transformer 10, and the center tap ω of the low-voltage winding 12 of the transformer 10 is connected to the bottom of the electroslag casting furnace 20. It can be seen from this that the following loop is formed: the first end a of the low-voltage winding 12 of the transformer 10 → the first consumable electrode 30 → the second consumable electrode 40 → the second end x of the low-voltage winding 12 of the transformer 10, that is, bipolar series power supply is realized, and thus double-electrode melting can be realized.

[0061] It should be noted that the center tap ω of the low-voltage winding 12 of the transformer 10 is already very mature in the prior art, and no detailed description will be given here.

[0062] In a specific example, such as Figure 1 or Figure 2 shown, the electroslag casting furnace 20 includes a mold 21 and a bottom water tank 22. Among them, the mold 21 and the bottom water tank 22 enclose the shape of the casting. In this example, the center tap ω of the low-voltage winding 12 of the transformer 10 is connected to the bottom water tank 22.

[0063] The above example only shows a specific implementation manner of the electroslag casting furnace 20. In practical applications, including but not limited to this, no specific limitation is made here, and it can be determined according to specific situations, and all are within the protection scope of this application.

[0064] If neither the first consumable electrode 30 nor the second consumable electrode 40 shows the "short leg" phenomenon, that is, the impedance of the first consumable electrode 30 is equal to the impedance of the second consumable electrode 40, then the current flowing through the first consumable electrode 30 is equal to the current flowing through the second consumable electrode 40, that is, there is no unbalanced current between the first consumable electrode 30 and the second consumable electrode 40. Therefore, the formed loop is like the above loop.

[0065] If the first consumable electrode 30 or the second consumable electrode 40 shows the "short leg" phenomenon, that is, the impedance of the first consumable electrode 30 is not equal to the impedance of the second consumable electrode 40, then the current flowing through the first consumable electrode 30 is not equal to the current flowing through the second consumable electrode 40, that is, there is an unbalanced current between the first consumable electrode 30 and the second consumable electrode 40. Therefore, in addition to the above loop, the formed loop also includes: the first end a of the low-voltage winding 12 of the transformer 10 → the first consumable electrode 30 → the bottom of the electroslag casting furnace 20 → the second end x of the low-voltage winding 12 of the transformer 10, or, the second end x of the low-voltage winding 12 of the transformer 10 → the second consumable electrode 40 → the bottom of the electroslag casting furnace 20 → the first end a of the low-voltage winding 12 of the transformer 10, that is, the connection line between the center tap ω of the low-voltage winding 12 of the transformer 10 and the bottom of the electroslag casting furnace 20 is used as the neutral line.

[0066] In this embodiment, since the high-voltage winding 11 of the transformer 10 receives three-phase alternating current and the low-voltage winding 12 of the transformer 10 outputs single-phase alternating current, the electroslag casting device utilizes three-phase alternating current, so that the electroslag casting device can improve the phase balance degree of the three-phase alternating current. In addition, since the connection line between the center tap ω of the low-voltage winding 12 of the transformer 10 and the bottom of the electroslag casting furnace 20 is used as the neutral line, if the "short leg" phenomenon occurs in the first consumable electrode 30 or the second consumable electrode 40, the connection line between the center tap ω of the low-voltage winding 12 of the transformer 10 and the bottom of the electroslag casting furnace 20 can absorb the unbalanced current between the first consumable electrode 30 and the second consumable electrode 40 to a certain extent, so that the electroslag casting device can reduce the unbalanced degree of the melting of the consumable electrode. To sum up, the electroslag casting device can not only improve the phase balance degree of the three-phase alternating current, but also reduce the unbalanced degree of the melting of the consumable electrode.

[0067] In this embodiment, since double-electrode melting can be achieved, in the feeding stage, although the operation can be carried out according to the decreasing current process of single-electrode melting, the feeding current at this time is equal to half of the feeding current during single-electrode melting.

[0068] In the traditional three-phase power supply mode, with the zero line O as the center line, the absolute value relationship of the voltages of the O phase, A phase, B phase, and C phase is: U AB =U BC =U CA =3 1 / 2 ×U AO =3 1 / 2 ×U BO =3 1 / 2 ×U CO .

[0069] In this electroslag casting device, with the connection line between the center tap ω of the low-voltage winding 12 of the transformer 10 and the bottom of the electroslag casting furnace 20 as the neutral line, the absolute value relationship of the voltages of the ω phase, a phase, and x phase is: Uax = 3 1 / 2 ×Uaω = 3 1 / 2 ×Uxω.

[0070] As can be seen from the above, the voltage ratio relationship in this electroslag casting device is exactly the same as the voltage ratio relationship in the traditional three-phase power supply mode. After production verification, the traditional three-phase power supply mode has stable process during multi-pole series casting. Therefore, it is indirectly proved that this electroslag casting device can meet the requirements of series casting.

[0071] Another embodiment of the present application provides another implementation manner of the electroslag casting device, and its specific structure can be referred to Figure 3 ( Figure 3 only in Figure 2(displayed on the basis of...). On the basis of the implementation method provided in the previous embodiment, this implementation method further includes: a first switch K1, a second switch K2, and N third switches K3. The connection relationships between the components are specifically described as follows:

[0072] The bottom of the electroslag casting furnace 20 is connected to one end of the first switch K1, and the other end of the first switch K1 is connected to the center tap ω of the low-voltage winding 12 of the transformer 10, that is: the bottom of the electroslag casting furnace 20 is connected to the center tap ω of the low-voltage winding 12 of the transformer 10 through the first switch K1. If the electroslag casting furnace 20 includes a mold 21 and a bottom water tank 22, then the bottom water tank 22 is connected to the center tap ω of the low-voltage winding 12 of the transformer 10 through the first switch K1.

[0073] The bottom of the electroslag casting furnace 20 is connected to one end of the second switch K2, and the other end of the second switch K2 is connected to the second end x of the low-voltage winding 12 of the transformer 10, that is: the bottom of the electroslag casting furnace 20 is connected to the second end x of the low-voltage winding 12 of the transformer 10 through the second switch K2. If the electroslag casting furnace 20 includes a mold 21 and a bottom water tank 22, then the bottom water tank 22 is connected to the second end x of the low-voltage winding 12 of the transformer 10 through the second switch K2.

[0074] The N second consumable electrodes 40 correspond one-to-one with the N third switches K3. Each second consumable electrode 40 is connected to: one end of the corresponding third switch K3, and the other end of the corresponding third switch K3 is connected to the second end x of the low-voltage winding 12 of the transformer 10, that is: the N second consumable electrodes 40 are connected to the second end x of the low-voltage winding 12 of the transformer 10 through the corresponding third switches K3.

[0075] For example, the second consumable electrode 40 on the left is connected to the second end x of the low-voltage winding 12 of the transformer 10 through the following third switch K3, and the second consumable electrode 40 on the right is connected to the second end x of the low-voltage winding 12 of the transformer 10 through the upper third switch K3.

[0076] When the double-electrode melting function of the electroslag casting device is enabled, the second switch K2 is in the off state, and the first switch K1 and the N third switches K3 are both in the on state, that is: the N first consumable electrodes 30 are connected to the first end a of the low-voltage winding 12 of the transformer 10, the N second consumable electrodes 40 are connected to the second end x of the low-voltage winding 12 of the transformer 10, and the center tap ω of the low-voltage winding 12 of the transformer 10 is connected to the bottom of the electroslag casting furnace 20. In this case, the connection relationships of the N first consumable electrodes 30, the N second consumable electrodes 40, and the bottom of the electroslag casting furnace 20 are the same as those in the previous embodiment. Therefore, as described above, in this case, bipolar series power supply can be achieved, and thus double-electrode melting can be realized.

[0077] When the single - electrode melting function of the electroslag casting device is enabled, the first switch K1 and N third switches K3 are all in the off state, and the second switch K2 is in the on state, that is: N first consumable electrodes 30 are connected to the first end a of the low - voltage winding 12 of the transformer 10, and the second end x of the low - voltage winding 12 of the transformer 10 is connected to the bottom of the electroslag casting furnace 20. Thus, the following loop is formed: the first end a of the low - voltage winding 12 of the transformer 10 → the first consumable electrode 30 → the bottom of the electroslag casting furnace 20 → the second end x of the low - voltage winding 12 of the transformer 10. Therefore, single - phase power supply can be achieved in this case, and then single - electrode melting can be realized.

[0078] It should be noted that if the single - electrode melting function of the electroslag casting device is utilized, the un - energized consumable electrodes can be removed in advance to avoid loss of the un - energized consumable electrodes.

[0079] In this embodiment, this implementation method realizes the combined power supply of a dual - power source with single - phase power supply and bipolar series power supply through the switching of switches. Therefore, this implementation method has two melting functions, namely, single - electrode melting function and double - electrode melting function. Thus, this implementation method can be applied to more scenarios, and it also lays a technical foundation for the development of multi - functional electroslag casting devices.

[0080] The above is only one implementation method for the electroslag casting device. In practical applications, it includes but is not limited to this. No specific limitation is made here and it can be determined according to specific circumstances, all within the protection scope of this application.

[0081] Another embodiment of this application provides another implementation method for the electroslag casting device, and its specific structure can be seen in Figure 4 ( Figure 4 only shown on the basis of Figure 2 ). On the basis of the implementation method provided in the first above - mentioned embodiment, this implementation method further includes: the first switch K1, the second switch K2 and the third switch K3. The connection relationships between the components are specifically described as follows:

[0082] The bottom of the electroslag casting furnace 20 is connected to one end of the first switch K1, and the other end of the first switch K1 is connected to the center tap ω of the low - voltage winding 12 of the transformer 10, that is: the bottom of the electroslag casting furnace 20 is connected to the center tap ω of the low - voltage winding 12 of the transformer 10 through the first switch K1. If the electroslag casting furnace 20 includes a mold 21 and a bottom water tank 22, then the bottom water tank 22 is connected to the center tap ω of the low - voltage winding 12 of the transformer 10 through the first switch K1.

[0083] The bottom of the electroslag casting furnace 20 is connected to one end of the second switch K2, and the other end of the second switch K2 is connected to the second end x of the low-voltage winding 12 of the transformer 10, that is: the bottom of the electroslag casting furnace 20 is connected to the second end x of the low-voltage winding 12 of the transformer 10 through the second switch K2. If the electroslag casting furnace 20 includes a mold 21 and a bottom water tank 22, then the bottom water tank 22 is connected to the second end x of the low-voltage winding 12 of the transformer 10 through the second switch K2.

[0084] N second consumable electrodes 40 are connected to one end of the third switch K3, and the other end of the third switch K3 is connected to the second end x of the low-voltage winding 12 of the transformer 10.

[0085] When the dual-electrode melting function of the electroslag casting device is enabled, the second switch K2 is in the open state, and the first switch K1 and the third switch K3 are both in the closed state, that is: N first consumable electrodes 30 are connected to the first end a of the low-voltage winding 12 of the transformer 10, N second consumable electrodes 40 are connected to the second end x of the low-voltage winding 12 of the transformer 10, and the center tap ω of the low-voltage winding 12 of the transformer 10 is connected to the bottom of the electroslag casting furnace 20. In this case, the connection relationship among the N first consumable electrodes 30, the N second consumable electrodes 40, and the bottom of the electroslag casting furnace 20 is the same as that in the first embodiment above. Therefore, as can be seen from the above, bipolar series power supply can be achieved in this case, and thus dual-electrode melting can be realized.

[0086] When the single-electrode melting function of the electroslag casting device is enabled, the first switch K1 and the third switch K3 are both in the open state, and the second switch K2 is in the closed state, that is: N first consumable electrodes 30 are connected to the first end a of the low-voltage winding 12 of the transformer 10, and the second end x of the low-voltage winding 12 of the transformer 10 is connected to the bottom of the electroslag casting furnace 20. In this case, the connection relationship among the N first consumable electrodes 30, the N second consumable electrodes 40, and the bottom of the electroslag casting furnace 20 is the same as that in the previous embodiment. Therefore, as can be seen from the above, single-phase power supply can be achieved in this case, and further single-electrode melting can be realized.

[0087] It should be noted that if the single-electrode melting function of the electroslag casting device is used, the unpowered consumable electrodes can be removed in advance to avoid loss of the unpowered consumable electrodes.

[0088] In this embodiment, this embodiment realizes dual-power combined power supply of single-phase power supply and bipolar series power supply by switching the switches. Therefore, this embodiment has two melting functions, namely the single-electrode melting function and the dual-electrode melting function. Thus, this embodiment can be applied to more scenarios, and it also lays a technical foundation for the development of multi-functional electroslag casting devices.

[0089] The above is only one implementation mode of the electroslag casting device. In actual applications, it includes but is not limited to this. No specific limitations are imposed here, and it can be determined according to specific circumstances, all within the protection scope of this application.

[0090] Another embodiment of this application provides another implementation mode of the electroslag casting device, and its specific structure can be referred to Figure 5 ( Figure 5 Only shown Figure 4 on the basis of). On the basis of the implementation mode provided by any one of the above two embodiments, this implementation mode further includes: a fourth switch K4 and N fifth switches K5. The connection relationships between the components are specifically described as follows:

[0091] The bottom of the electroslag casting furnace 20 is connected to one end of the fourth switch K4, and the other end of the fourth switch K4 is connected to the first end a of the low-voltage winding 12 of the transformer 10, that is: the bottom of the electroslag casting furnace 20 is connected to the first end a of the low-voltage winding 12 of the transformer 10 through the fourth switch K4. If the electroslag casting furnace 20 includes a mold 21 and a bottom water tank 22, then the bottom water tank 22 is connected to the first end a of the low-voltage winding 12 of the transformer 10 through the fourth switch K4.

[0092] The N first consumable electrodes 30 correspond to the N fifth switches K5 one by one. Each first consumable electrode 30 is connected to: one end of the fifth switch K5 corresponding to itself, and the other end of the fifth switch K5 corresponding to itself is connected to the first end a of the low-voltage winding 12 of the transformer 10, that is: the N first consumable electrodes 30 are connected to the first end a of the low-voltage winding 12 of the transformer 10 through the fifth switch K5 corresponding to themselves.

[0093] For example, the first consumable electrode 30 on the left is connected to the first end a of the low-voltage winding 12 of the transformer 10 through the lower fifth switch K5, and the first consumable electrode 30 on the right is connected to the first end a of the low-voltage winding 12 of the transformer 10 through the upper fifth switch K5.

[0094] When the dual-electrode melting function of the electroslag casting device is enabled, the second switch K2 and the fourth switch K4 are both in the off state, and the first switch K1, the N fifth switches K5, and all the third switches K3 are all in the on state, that is: the N first consumable electrodes 30 are connected to the first end a of the low-voltage winding 12 of the transformer 10, the N second consumable electrodes 40 are connected to the second end x of the low-voltage winding 12 of the transformer 10, and the center tap ω of the low-voltage winding 12 of the transformer 10 is connected to the bottom of the electroslag casting furnace 20. In this case, the connection relationships of the N first consumable electrodes 30, the N second consumable electrodes 40, and the bottom of the electroslag casting furnace 20 are the same as those in the first embodiment above. Therefore, it can be seen from the above that in this case, bipolar series power supply can be achieved, and thus dual-electrode melting can be realized.

[0095] When the single - electrode melting function of the electroslag casting device is enabled, if the first switch K1, the fourth switch K4, and all the third switches K3 are in the off state, and the second switch K2 and N fifth switches K5 are in the on state, that is: N first consumable electrodes 30 are connected to the first end a of the low - voltage winding 12 of the transformer 10, and the second end x of the low - voltage winding 12 of the transformer 10 is connected to the bottom of the electroslag casting furnace 20. Then, the connection relationship among the N first consumable electrodes 30, the N second consumable electrodes 40, and the bottom of the electroslag casting furnace 20 is the same as that in the previous embodiment. Therefore, as can be seen from the above, single - phase power supply can be achieved in this case, and thus single - electrode melting can be achieved.

[0096] When the single - electrode melting function of the electroslag casting device is enabled, if the first switch K1, the second switch K2, and N fifth switches K5 are in the off state, and the fourth switch K4 and all the third switches K3 are in the on state, that is, N second consumable electrodes 40 are connected to the second end x of the low - voltage winding 12 of the transformer 10, and the first end a of the low - voltage winding 12 of the transformer 10 is connected to the bottom of the electroslag casting furnace 20. Therefore, the following loop is formed: the second end x of the low - voltage winding 12 of the transformer 10 → the second consumable electrode 40 → the bottom of the electroslag casting furnace 20 → the first end a of the low - voltage winding 12 of the transformer 10. Thus, single - phase power supply can be achieved in this case, and thus single - electrode melting can be achieved.

[0097] It should be noted that if the single - electrode melting function of the electroslag casting device is used, the un - energized consumable electrodes can be removed in advance to avoid loss of the un - energized consumable electrodes.

[0098] In this embodiment, this implementation method realizes the dual - power - source combined power supply of single - phase power supply and bipolar series power supply by switching the switches. Therefore, this implementation method has two melting functions, namely the single - electrode melting function and the bipolar melting function. Thus, this implementation method can be applied to more scenarios, and it also lays a technical foundation for the development of multi - functional electroslag casting devices.

[0099] The above is only one implementation method of the electroslag casting device. In practical applications, it includes but is not limited to this. No specific limitation is made here, and it can be determined according to specific circumstances, and all are within the protection scope of this application.

[0100] Another embodiment of this application provides another implementation method of the electroslag casting device, and its specific structure can be seen in Figure 6 ( Figure 6 Only shown on the basis of Figure 4 ). On the basis of the implementation methods provided in the second or third embodiment above, this implementation method further includes: the fourth switch K4 and the fifth switch K5. The connection relationship among each device is specifically described as follows:

[0101] The bottom of the electroslag casting furnace 20 is connected to one end of the fourth switch K4, and the other end of the fourth switch K4 is connected to the first end a of the low-voltage winding 12 of the transformer 10, that is: the bottom of the electroslag casting furnace 20 is connected to the first end a of the low-voltage winding 12 of the transformer 10 through the fourth switch K4. If the electroslag casting furnace 20 includes a mold 21 and a bottom water tank 22, then the bottom water tank 22 is connected to the first end a of the low-voltage winding 12 of the transformer 10 through the fourth switch K4.

[0102] N first consumable electrodes 30 are connected to one end of the fifth switch K5, and the other end of the fifth switch K5 is connected to the first end a of the low-voltage winding 12 of the transformer 10.

[0103] When the dual-electrode melting function of the electroslag casting device is enabled, the second switch K2 and the fourth switch K4 are both in the off state, and the first switch K1, the fifth switch K5, and all the third switches K3 are all in the on state, that is: N first consumable electrodes 30 are connected to the first end a of the low-voltage winding 12 of the transformer 10, N second consumable electrodes 40 are connected to the second end x of the low-voltage winding 12 of the transformer 10, and the center tap ω of the low-voltage winding 12 of the transformer 10 is connected to the bottom of the electroslag casting furnace 20. In this case, the connection relationship among the N first consumable electrodes 30, the N second consumable electrodes 40, and the bottom of the electroslag casting furnace 20 is the same as that in the previous embodiment. Therefore, as can be seen from the above, bipolar series power supply can be achieved in this case, and thus dual-electrode melting can be realized.

[0104] When the single-electrode melting function of the electroslag casting device is enabled, if the first switch K1, the fourth switch K4, and all the third switches K3 are all in the off state, and the second switch K2 and the fifth switch K5 are both in the on state, that is: N first consumable electrodes 30 are connected to the first end a of the low-voltage winding 12 of the transformer 10, and the second end x of the low-voltage winding 12 of the transformer 10 is connected to the bottom of the electroslag casting furnace 20, then in this case, the connection relationship among the N first consumable electrodes 30, the N second consumable electrodes 40, and the bottom of the electroslag casting furnace 20 is the same as that in the previous embodiment. Therefore, as can be seen from the above, single-phase power supply can be achieved in this case, and further single-electrode melting can be realized.

[0105] When the single - electrode melting function of the electroslag casting device is enabled, if the first switch K1, the second switch K2, and the fifth switch K5 are all in the off state, and the fourth switch K4 and all the third switches K3 are all in the on state, that is, N second consumable electrodes 40 are connected to the second end x of the low - voltage winding 12 of the transformer 10, and the first end a of the low - voltage winding 12 of the transformer 10 is connected to the bottom of the electroslag casting furnace 20. Then, in this case, the connection relationship among the N first consumable electrodes 30, the N second consumable electrodes 40, and the bottom of the electroslag casting furnace 20 is the same as that in the previous embodiment. Therefore, as can be seen from the above, single - phase power supply can be achieved in this case, and thus single - electrode melting can be realized.

[0106] It should be noted that if the single - electrode melting function of the electroslag casting device is used, the un - energized consumable electrodes can be removed in advance to avoid loss of the un - energized consumable electrodes.

[0107] In this embodiment, this implementation method realizes the combined power supply of dual - power sources of single - phase power supply and bipolar series power supply by switching the switches. Therefore, this implementation method has two melting functions, namely, single - electrode melting function and double - electrode melting function. Thus, this implementation method can be applied to more scenarios, and it also lays a technical foundation for the development of multi - functional electroslag casting devices.

[0108] The above is only one implementation method of the electroslag casting device. In actual applications, including but not limited to this, no specific limitation is made here and it can be determined according to specific situations, all within the protection scope of this application.

[0109] Another embodiment of this application provides another implementation method of the electroslag casting device. On the basis of the implementation methods provided in any of the above - mentioned embodiments, this implementation method further includes: 2N clamping structures and 2N supporting structures. The connection relationships among the components are specifically described as follows:

[0110] The 2N clamping structures correspond one - to - one with the 2N supporting structures, and each clamping structure realizes its own installation through the supporting structure corresponding to itself.

[0111] It should be noted that the realization of the installation of the clamping structure through the supporting structure corresponding to itself is already very mature in the prior art, and no detailed description will be given here.

[0112] The N clamping structures correspond one - to - one with the N first consumable electrodes 30, and each clamping structure is used to clamp the first consumable electrode 30 corresponding to itself. In addition, the N clamping structures correspond one - to - one with the N second consumable electrodes 40, and the N clamping structures are used to clamp the second consumable electrode 40 corresponding to itself.

[0113] The above only shows one implementation of disposing both the first consumable electrode 30 and the second consumable electrode 40 in the electroslag casting furnace 20. In practical applications, it includes but is not limited to this, and no specific limitation is made here. It can be determined according to specific circumstances, and all are within the protection scope of this application.

[0114] Another embodiment of this application provides another implementation of the electroslag casting device. In addition to the previous embodiment, based on the implementation provided in any of the above embodiments, this implementation further includes: N clamping structures and N supporting structures. The connection relationships between the components are specifically described as follows:

[0115] The N clamping structures correspond one by one to the N supporting structures, and each clamping structure realizes its own installation through the corresponding supporting structure.

[0116] It should be noted that the installation of the clamping structure through the corresponding supporting structure has been very mature in the prior art, and no detailed description will be given here.

[0117] The N clamping structures correspond one by one to the N first consumable electrodes 30, and the N clamping structures correspond one by one to the N second consumable electrodes 40. Each clamping structure is used to clamp the corresponding first consumable electrode 30 and the corresponding second consumable electrode 40 respectively.

[0118] In this embodiment, this implementation includes N supporting structures. Compared with the previous embodiment, this implementation requires fewer supporting structures, so that the structure of the electroslag casting device is simplified, and the production operation is also facilitated.

[0119] In addition, in this example, if double-electrode melting is to be achieved, the clamping structure can clamp the corresponding first consumable electrode 30 and the corresponding second consumable electrode 40. If single-electrode melting is to be achieved, the clamping structure can only clamp one of the consumable electrodes. Therefore, this implementation solves the problem of independent clamping of single electrodes and double electrodes to a certain extent.

[0120] The above only shows one implementation of disposing both the first consumable electrode 30 and the second consumable electrode 40 in the electroslag casting furnace 20. In practical applications, it includes but is not limited to this, and no specific limitation is made here. It can be determined according to specific circumstances, and all are within the protection scope of this application.

[0121] Another embodiment of this application provides a specific implementation of the clamping structure, and its specific structure can be referred to Figure 7 ( Figure 7 shown only by taking two chucks as an example) or Figure 8 ( Figure 8 shown only by taking two chucks as an example), and specifically includes: at least two chucks 50.

[0122] Each chuck 50 is longitudinally arranged, and each chuck 50 is used to clamp the corresponding consumable electrode.

[0123] In a specific example, such as Figure 8 shown, each chuck 50 can be longitudinally arranged in the open slot.

[0124] The above example only shows a specific arrangement method of each chuck 50. In actual applications, including but not limited to this, no specific limitation is made here, and it can be determined according to specific situations, and all are within the protection scope of this application.

[0125] In a specific example, the chuck 50 can be a hydraulic jack. The hydraulic jack is already very mature in the prior art, and no detailed description is made here.

[0126] The above example only shows a specific implementation manner of the chuck 50. In actual applications, including but not limited to this, no specific limitation is made here, and it can be determined according to specific situations, and all are within the protection scope of this application.

[0127] In a specific example, each chuck 50 is an integral structure, that is, each chuck 50 is not detachable.

[0128] The above is only a connection method of each chuck 50. In actual applications, including but not limited to this, no specific limitation is made here, and it can be determined according to specific situations, and all are within the protection scope of this application.

[0129] In this embodiment, since each chuck 50 is longitudinally arranged, compared with the transverse arrangement of each chuck 50, this embodiment can avoid the problem of transverse eccentricity of the support structure to a certain extent.

[0130] The above is only a specific implementation manner of the clamping structure. In actual applications, including but not limited to this, no specific limitation is made here, and it can be determined according to specific situations, and all are within the protection scope of this application.

[0131] Another embodiment of this application provides another specific implementation manner of the clamping structure, and its specific structure can be seen in Figure 7 ( Figure 7 shown only by taking two chucks 50, an insulating structure 60, and two conductive structures as examples) Figure 8 ( Figure 8 shown only by taking two chucks 50, an insulating structure 60, and two conductive structures as examples). On the basis of the implementation manner provided by the previous embodiment, this implementation manner further includes: at least one insulating structure 60 and at least two conductive structures.

[0132] An insulating structure 60 is arranged between any two adjacent chucks 50. For example, such as Figure 7 or Figure 8As shown in the figure, an insulating structure 60 is provided between the chuck 50 on the left side and the chuck 50 on the right side.

[0133] Each chuck 50 corresponds to each conductive structure one by one. Each chuck 50 realizes the electrical connection of the electrode it clamps through the conductive structure corresponding to itself. For example, if the electrode clamped by a chuck 50 is the first consumable electrode 30, then this chuck 50 realizes the electrical connection between the first consumable electrode 30 and the first end a of the low-voltage winding 12 of the transformer 10 through the conductive structure corresponding to itself.

[0134] In a specific example, for each conductive structure, the conductive structure includes a conductive plate 71 and a conductive connecting plate 72. The conductive plate 71 is used to realize the conduction between the corresponding consumable electrode and the chuck 50. The conductive connecting plate 72 is arranged on the chuck 50, and the conductive connecting plate 72 is used to realize the conduction between the connecting wire connected to the corresponding consumable electrode and the chuck 50, so as to realize the electrical connection of the corresponding consumable electrode.

[0135] The above example is only a specific implementation manner of the conductive structure. In actual applications, it includes but is not limited to this. No specific limitation is made here, and it can be determined according to specific circumstances, and all are within the protection scope of this application.

[0136] Another embodiment of this application provides another implementation manner of the electroslag furnace device. On the basis of the implementation manner provided in any one of the above embodiments, the following improvements are made:

[0137] The first connection and the second connection cross each other, and the third connection and the second connection cross each other.

[0138] As Figure 9 shown, the first connection is the connection between the first connection point G and the first end a of the low-voltage winding 12 of the transformer 10. If N is greater than 1, the first connection point G is the connection point of N first consumable electrodes 30. If N is equal to 1, the first connection point G is the connection end of the first consumable electrode 30.

[0139] As Figure 9 shown, the second connection is the connection between the bottom of the electroslag casting furnace 20 and the center tap ω of the low-voltage winding 12 of the transformer 10.

[0140] As Figure 9 shown, the third connection is the connection between the second connection point H and the second end x of the low-voltage winding 12 of the transformer 10. If N is greater than 1, the second connection point H is the connection point of N second consumable electrodes 40. If N is equal to 1, the second connection point H is the connection end of the second consumable electrode 40.

[0141] In this embodiment, since the first connection and the second connection cross each other, and the third connection and the second connection cross each other, the loss of AC inductive reactance can be reduced, thereby reducing the energy loss.

[0142] Another embodiment of the present application provides a port setting method for the low-voltage side of the transformer 10. For its specific structure, please refer to Figure 9 ( Figure 9 Shown only by taking P equal to 2 as an example), specifically as follows:

[0143] The low-voltage side of the transformer 10 is provided with P first output terminals m1, P second output terminals m2, P third output terminals m3, and P fourth output terminals m4; P is a positive integer; where:

[0144] The P first output terminals m1 and the P second output terminals m2 are arranged alternately. The P first output terminals m1 are connected to the first connection point G, and the P second output terminals m2 are connected to the bottom of the electroslag remelting furnace 20; the P first output terminals m1 are connected to the first end a of the low-voltage winding 12 of the transformer 10, and the P second output terminals m2 are connected to the center tap ω of the low-voltage winding 12 of the transformer 10.

[0145] The P third output terminals m3 and the P fourth output terminals m4 are arranged alternately. The P third output terminals m3 are connected to the second connection point H, and the P fourth output terminals m4 are connected to the bottom of the electroslag remelting furnace 20; the P third output terminals m3 are connected to the second end x of the low-voltage winding 12 of the transformer 10, and the P fourth output terminals m4 are connected to the center tap ω of the low-voltage winding 12 of the transformer 10.

[0146] The above is only one port setting method for the low-voltage side of the transformer 10. In actual applications, it includes but is not limited to this. No specific limitation is made here and it can be determined according to specific situations, all within the protection scope of the present application.

[0147] Another embodiment of the present application provides another implementation manner of the electroslag remelting device. Based on the implementation manner provided in any of the above embodiments, the following improvements are made:

[0148] The length of the first consumable electrode 30 is greater than the length of the second consumable electrode 40, or the length of the second consumable electrode 40 is greater than the length of the first consumable electrode 30. In general, the lengths of the two consumable electrodes can differ by 100 mm - 200 mm.

[0149] In this embodiment, since the lengths of the two consumable electrodes are not equal, the long consumable electrode will establish a current path with the bottom of the electroslag remelting furnace 20 prior to the short consumable electrode. Therefore, this path can be used to initiate the arc first, thereby alleviating the problem of difficult synchronous arc initiation of the two electrodes to a certain extent.

[0150] The above is only one implementation manner of the electroslag casting device. In actual applications, it includes but is not limited to this. No specific limitation is made here and it can be determined according to specific circumstances, and all are within the protection scope of this application. Regarding the above description of the disclosed embodiments, the features described in each embodiment in this specification can be replaced or combined with each other, enabling those skilled in the art to implement or use this application. The above is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above, or modify it into equivalent embodiments with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. An electroslag casting device, characterized in that, Comprising: A transformer, an electroslag remelting furnace, N first consumable electrodes and N second consumable electrodes; N is a positive integer; wherein: The high-voltage winding of the transformer receives three-phase alternating current, and the low-voltage winding of the transformer outputs single-phase alternating current; The N first consumable electrodes and the N second consumable electrodes are all arranged in the electroslag remelting furnace; The N first consumable electrodes are connected to the first end of the low-voltage winding, and the N second consumable electrodes are connected to the second end of the low-voltage winding; The center tap of the low-voltage winding is connected to the bottom of the electroslag remelting furnace.

2. The electroslag casting device according to claim 1, characterized in that, Further comprising: A first switch, a second switch and at least one third switch; wherein: The bottom of the electroslag remelting furnace is connected to the center tap through the first switch; The bottom of the electroslag remelting furnace is connected to the second end of the low-voltage winding through the second switch; The number of the third switches is equal to N, and the N second consumable electrodes correspond to the N third switches one by one. The second consumable electrodes are connected to the second end of the low-voltage winding through the corresponding third switches; Or, The number of the third switches is equal to 1. The N second consumable electrodes are connected to one end of the third switch, and the other end of the third switch is connected to the second end of the low-voltage winding; When the single-electrode melting function of the electroslag melting device is enabled, the first switch and all the third switches are in the off state, and the second switch is in the on state.

3. The electroslag casting device according to claim 2, characterized in that, Further comprising: A fourth switch and at least one fifth switch; wherein: The bottom of the electroslag remelting furnace is connected to the first end of the low-voltage winding through the fourth switch; The number of the fifth switches is equal to N, and the N first consumable electrodes correspond to the N fifth switches one by one. The first consumable electrodes are connected to the first end of the low-voltage winding through the corresponding fifth switches; Or, The number of the fifth switches is equal to 1. The N first consumable electrodes are connected to one end of the fifth switch, and the other end of the fifth switch is connected to the first end of the low-voltage winding; When the single-electrode melting function of the electroslag melting device is enabled, the first switch and all the third switches are in the off state, the second switch and all the fifth switches are in the on state, or the first switch and all the fifth switches are in the off state, and the fourth switch and all the third switches are in the on state.

4. The electroslag casting device according to claim 1, characterized in that, Further comprising: N clamping structures and N supporting structures; wherein: The N clamping structures correspond to the N supporting structures one by one, and the clamping structures are installed through the corresponding supporting structures; The N clamping structures correspond to the N first consumable electrodes one by one, and the N clamping structures correspond to the N second consumable electrodes one by one. The clamping structures are used to clamp the corresponding first consumable electrodes and the corresponding second consumable electrodes respectively.

5. The electroslag casting device according to claim 4, characterized in that The clamping structure includes: at least two chucks; wherein: Each of the chucks is longitudinally arranged.

6. The electroslag casting device according to claim 5, characterized in that, The clamping structure further includes: at least one insulating structure and at least two conductive structures; wherein: An insulating structure is provided between any two adjacent ones of the chucks; Each of the chucks corresponds to one of the conductive structures, and the chuck realizes the electrical connection of the electrode clamped by itself through the conductive structure corresponding to itself.

7. The electroslag furnace device according to any one of claims 1 to 6, characterized in that, The first connection and the second connection cross each other, and the third connection and the second connection cross each other; The first connection is the connection between the first connection point and the first end of the low-voltage winding; N is greater than 1, the first connection point is the connection point of N first self-consumable electrodes, and when N is equal to 1, the first connection point is the connection end of the first self-consumable electrode; The second connection is the connection between the bottom of the electroslag casting furnace and the center tap; The third connection is the connection between the second connection point and the second end of the low-voltage winding; N is greater than 1, the second connection point is the connection point of N second self-consumable electrodes, and when N is equal to 1, the second connection point is the connection end of the second self-consumable electrode.

8. The electroslag melting furnace device according to claim 7, wherein, The low-voltage side of the transformer is provided with P first output terminals, P second output terminals, P third output terminals and P fourth output terminals; P is a positive integer; wherein: The P first output terminals and the P second output terminals are arranged alternately, the P first output terminals are connected to the first connection point, and the P second output terminals are connected to the bottom of the electroslag casting furnace; the P first output terminals are connected to the first end of the low-voltage winding, and the P second output terminals are connected to the center tap; The P third output terminals and the P fourth output terminals are arranged alternately, the P third output terminals are connected to the second connection point, and the P fourth output terminals are connected to the bottom of the electroslag casting furnace; the P third output terminals are connected to the second end of the low-voltage winding, and the P fourth output terminals are connected to the center tap.

9. The electroslag casting device according to any one of claims 1 to 6, characterized in that, The length of the first self-consumable electrode is greater than the length of the second self-consumable electrode; Or, The length of the second self-consumable electrode is greater than the length of the first self-consumable electrode.

10. The electroslag casting device according to any one of claims 1 to 6, characterized in that, The transformer is a T-type transformer.

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