CN113162434B

CN113162434B - Three-phase high-frequency power supply for electric furnace

Info

Publication number: CN113162434B
Application number: CN202110523686.2A
Authority: CN
Inventors: 张志武
Original assignee: Shanghai Kemo Power Manufacturing Co ltd
Current assignee: Shanghai Kemo Power Manufacturing Co ltd
Priority date: 2021-05-13
Filing date: 2021-05-13
Publication date: 2023-02-17
Anticipated expiration: 2041-05-13
Also published as: CN113162434A

Abstract

The invention belongs to the technical field of electric furnace power supplies, and particularly relates to a three-phase high-frequency power supply for an electric furnace, which comprises an outer shell, an output switch circuit, a high-frequency isolation AC/AC conversion circuit and a three-phase input switch circuit, wherein the output switch circuit, the high-frequency isolation AC/AC conversion circuit and the three-phase input switch circuit are electrically connected, the right side wall of the outer shell is provided with an installation plate, the upper side and the lower side of the right side wall of the installation plate are respectively provided with an installation connection mechanism, and the inner cavity of the outer shell is provided with a PCB. Through the cooperation of the output switch circuit, the high-frequency isolation AC/AC conversion circuit and the three-phase input switch circuit, the existing two-pole direct current or single-phase power supply mode is changed, a three-phase high-frequency power supply mode can be provided, and the efficiency is high; the cooling fan and the ventilation groove are arranged, so that the cooling and heat dissipation can be realized quickly; through the cooperation of installing support, dry box, can keep the inside air drying of shell body.

Description

Three-phase high-frequency power supply for electric furnace

Technical Field

The invention relates to the technical field of electric furnace power supplies, in particular to a three-phase high-frequency power supply for an electric furnace.

Background

The electric furnace is a heating furnace for converting electric energy in the furnace into heat to heat a workpiece, and can be divided into a resistance furnace, an induction furnace, an electric arc furnace, a plasma furnace, an electron beam furnace and the like.

Compared with a fuel furnace, the electric furnace has the advantages that: the atmosphere in the furnace is easy to control; the material is heated quickly; the heating temperature is high; the temperature is easy to control; the production process is easy to realize mechanization and automation; the labor sanitary condition is good; the thermal efficiency is high; the product has good quality, is more environment-friendly, and is beneficial to relieving increasingly serious environmental problems.

The existing electric furnace heating mode is generally that the semiconductor is heated by the silicon-controlled rectifier, the heating mode is low in efficiency, high in energy consumption, greatly influenced by power grid fluctuation, and high in slope ratio, and the existing power supply control mode is difficult to achieve high frequency, so that the heating rate is low.

Disclosure of Invention

The invention aims to provide a three-phase high-frequency power supply for an electric furnace, which aims to solve the problems that the conventional electric furnace heating mode proposed in the background technology is generally silicon controlled to heat a semiconductor, the heating mode has low efficiency and high energy consumption, is greatly influenced by power grid fluctuation, has a higher slope, and is difficult to realize high frequency in the conventional power supply control mode, so that the heating rate is lower.

In order to achieve the purpose, the invention provides the following technical scheme: a three-phase high-frequency power supply for an electric furnace comprises an outer shell, an output switch circuit, a high-frequency isolation AC/AC conversion circuit and a three-phase input switch circuit, wherein the output switch circuit, the high-frequency isolation AC/AC conversion circuit and the three-phase input switch circuit are electrically connected, a mounting plate is arranged on the right side wall of the outer shell, mounting and connecting mechanisms are arranged on the upper side and the lower side of the right side wall of the mounting plate, a PCB (printed circuit board) is arranged in an inner cavity of the outer shell, the output switch circuit, the high-frequency isolation AC/AC conversion circuit and the three-phase input switch circuit are arranged on the PCB, a main switch, a wiring terminal and an indicator lamp are arranged on the outer wall of the outer shell, the wiring terminal is connected with the three-phase input switch circuit, the three-phase input switch circuit is connected with the high-frequency isolation AC/AC conversion circuit, the high-frequency isolation AC/AC conversion circuit is connected with the output switch circuit, and the main switch and the indicator lamp are connected between the three-phase input switch circuit and the main switch circuit;

the installation and connection mechanism comprises a support column and a connection screw head connected to the left side wall of the support column, an adjusting groove is longitudinally formed in the middle right side of the support column, the adjusting groove divides the support column into a front sliding plate and a rear sliding plate, sliding grooves are transversely formed in the front sliding plate and the rear sliding plate, supporting rings are arranged in the sliding grooves and are connected with support shafts, two clamping strips are symmetrically arranged in the middle of the outer wall of each support shaft and penetrate through the adjusting grooves, supporting springs are arranged on the right sides of the inner portions of the sliding grooves, and the left ends of the supporting springs are connected with the right side wall of each supporting ring.

Preferably, the left side wall of shell body is provided with the access door, the access door rotates through the left side wall of round pin axle with the shell body and is connected.

Preferably, the lower side of the inner cavity of the outer shell is connected with a mounting bracket through a screw, and the mounting bracket is provided with a drying box.

Preferably, the drying box comprises a hollow shell, a top cover is arranged at the upper end of the hollow shell, vent holes are uniformly formed in the upper surface of the top cover, and a drying agent is filled in the hollow shell.

Preferably, the mounting bracket is concave, and the drying box is arranged in the concave part of the mounting bracket.

Preferably, a cooling fan is arranged on the outer wall of the outer shell and corresponds to the PCB, and a ventilation groove corresponding to the PCB is formed in the right side wall of the mounting plate.

Compared with the prior art, the invention has the beneficial effects that:

1) Through the cooperation of the output switch circuit, the high-frequency isolation AC/AC conversion circuit and the three-phase input switch circuit, the existing two-pole direct current or single-phase power supply mode is changed, a three-phase high-frequency power supply mode can be provided, and the efficiency is high;

2) The cooling fan and the ventilation groove are arranged, so that the cooling and heat dissipation can be realized quickly;

3) Through the cooperation of installing support, dry box, can keep the inside air drying of shell body.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is a schematic view of the mounting connection mechanism of the present invention;

FIG. 4 is a schematic view of the structure of the drying box of the present invention;

fig. 5 is a schematic structural view of the present invention during installation.

In the figure: the device comprises an outer shell 1, a mounting plate 2, a mounting connection mechanism 3, a support column 31, a connecting screw head 32, a sliding chute 33, a supporting shaft 34, a supporting ring 35, a clamping strip 36, a supporting spring 37, a cooling fan 4, a main switch 5, a terminal 6, an indicator light 7, an access door 8, a PCB 9, an output switch circuit 10, a high-frequency isolation AC/AC conversion circuit 11, a three-phase input switch circuit 12, a mounting bracket 13, a drying box 14, a hollow shell 141, a top cover 142, an air vent 143 and a ventilation groove 15.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Example (b):

referring to fig. 1-5, the present invention provides a technical solution: the utility model provides a three-phase high frequency power supply for electric stove, includes shell body 1, output switch circuit 10, high frequency isolation AC converting circuit 11 and three-phase input switch circuit 12, electric connection between output switch circuit 10, high frequency isolation AC converting circuit 11 and the three-phase input switch circuit 12, the right side wall of shell body 1 is provided with mounting panel 2, the downside all is provided with installation coupling mechanism 3 on the right side wall of mounting panel 2, the inner chamber of shell body 1 is provided with PCB board 9, output switch circuit 10, high frequency isolation AC converting circuit 11 and three-phase input switch circuit 12 are arranged in on PCB board 9, be provided with master switch 5, wiring end 6 and pilot lamp 7 on the outer wall of shell body 1, wiring end 6 is connected with three-phase input switch circuit 12, three-phase input switch circuit 12 is connected with high frequency isolation AC converting circuit 11, high frequency isolation AC converting circuit 11 is connected with output switch circuit 10, master switch 5, pilot lamp 7 are connected between three-phase input switch circuit 12, master switch 5.

Furthermore, the left side wall of shell body 1 is provided with access door 8, access door 8 rotates through the round pin axle with the left side wall of shell body 1 and is connected, through the mode of rotating the connection, makes things convenient for access door 8 to open and close the operation.

Further, the lower side of the inner cavity of the outer shell 1 is connected with a mounting bracket 13 through a screw, and a drying box 14 is arranged on the mounting bracket 13.

Further, the drying box 14 includes a hollow casing 141, a top cover 142 is disposed at the upper end of the hollow casing 141, vent holes 143 are uniformly formed in the upper surface of the top cover 142, a drying agent is filled in the hollow casing 141, and the drying action of the air inside the outer casing 1 is ensured through the moisture absorption action of the drying agent, wherein the drying agent is quicklime or other drying agents.

Further, the mounting bracket 13 is concave, and the drying box 14 is arranged in the concave part of the mounting bracket 13, so that the center of gravity of the drying box 14 is lowered, and the mounting is stable.

Further, be provided with cooling fan 4 on the outer wall of shell body 1, cooling fan 4 is corresponding with the position of PCB board 9, the right side wall of mounting panel 2 is seted up the ventilation groove 15 that corresponds with PCB board 9 position, through cooling fan 4, ventilation groove 15's mating reaction, can drive the air flow and take away PCB board 9 and the circuit heat thereon.

Further, installation coupling mechanism 3 includes pillar 31 and connects the connection spiral shell head 32 at pillar 31 left side wall, the adjustment tank has vertically been seted up to the well right side of pillar 31, the adjustment tank separates pillar 31 for preceding slide and back slide, spout 33 has all transversely been seted up on preceding slide and the back slide, be provided with lock ring 35 in the spout 33, two be connected with back shaft 34 between the lock ring 35, the outer wall middle part symmetry of back shaft 34 is provided with two grip strips 36, grip strip 36 runs through the adjustment tank, the inside right side of spout 33 is provided with supporting spring 37, supporting spring 37's left end and the right side wall connection of lock ring 35.

The working principle is as follows: during the use, paste mounting panel 2 on the mounting panel, stretch into the inside of mounting panel with installation coupling mechanism 3 (set up the mounting hole in advance on the mounting panel), connect the locking (as shown in fig. 5) between mounting panel and the mounting panel 2 through installation coupling mechanism 3, centre gripping strip 36 supports in one side of mounting panel, mounting panel 2 supports in the opposite side of mounting panel, under supporting spring 37's elasticity supporting role, back shaft 34 drives centre gripping strip 36 and hugs closely on the lateral wall of mounting panel, make mounting panel 2, install and couple mechanism 3 and be connected the fastening between the mounting panel. During the dismantlement, draw centre gripping strip 36 right, centre gripping strip 36 drives back shaft 34, lock ring 35 and draws right to compress supporting spring 37, rotate centre gripping strip 36, make centre gripping strip 36 rotate on back shaft 34, in centre gripping strip 36 rotatory 90 degrees accomodates the adjustment tank, thereby installation coupling mechanism 3 can break away from the mounting panel.

The power supply terminal is connected through the terminal 6, electric energy is input into the output switch circuit 10, the high-frequency isolation AC/AC conversion circuit 11 and the three-phase input switch circuit 12 through the terminal 6, and finally output, and the main switch 5 can close or cut off the circuit of the device.

The drying box 14 is supported by the mounting bracket 13 so that the drying box 14 is isolated from the inner lower side of the outer casing 1, the drying agent is arranged in the hollow casing 141, and air can pass through the top cover 142 to enter the hollow casing 141 through the vent hole 143, so that the air is in contact with the drying agent, and the drying effect is exerted on the air.

When the maintenance is needed, the maintenance door 8 is opened, the position of the maintenance door 8 corresponds to the position of the PCB 9, the maintenance operation of the output switch circuit 10, the high-frequency isolation AC/AC conversion circuit 11 and the three-phase input switch circuit 12 is convenient, the cooling fan 4 blows external air into the inner part of the outer shell 1, the air is contacted with the output switch circuit 10, the high-frequency isolation AC/AC conversion circuit 11 and the three-phase input switch circuit 12, and heat generated on the surfaces of the output switch circuit 10, the high-frequency isolation AC/AC conversion circuit 11 and the three-phase input switch circuit 12 is exchanged and is brought to the outer part of the outer shell 1 through the ventilation groove 15.

While there have been shown and described the fundamental principles and essential features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A three-phase high-frequency power supply for an electric furnace, comprising an outer case (1), an output switch circuit (10), a high-frequency isolation AC/AC conversion circuit (11) and a three-phase input switch circuit (12), characterized in that: the high-frequency isolation AC/AC conversion circuit comprises an output switch circuit (10), a high-frequency isolation AC/AC conversion circuit (11) and a three-phase input switch circuit (12), wherein the output switch circuit (10), the high-frequency isolation AC/AC conversion circuit (11) and the three-phase input switch circuit (12) are electrically connected, a mounting plate (2) is arranged on the right side wall of an outer shell (1), a mounting connection mechanism (3) is arranged on the upper side and the lower side of the right side wall of the mounting plate (2), a PCB (9) is arranged in an inner cavity of the outer shell (1), the output switch circuit (10), the high-frequency isolation AC/AC conversion circuit (11) and the three-phase input switch circuit (9) are arranged on the PCB, a main switch (5), a wiring terminal (6) and an indicator lamp (7) are arranged on the outer wall of the outer shell (1), the wiring terminal (6) is connected with the three-phase input switch circuit (12), the three-phase input switch circuit (12) is connected with the high-frequency isolation AC/AC conversion circuit (11), the high-frequency isolation AC/AC conversion circuit (11) is connected with the output switch circuit (10), and the main switch (5) and the indicator lamp (7) are connected between the three-phase input switch circuit (12) and the three-phase input switch circuit;

installation coupling mechanism (3) include pillar (31) and connect connection spiral shell head (32) at pillar (31) left side wall, the adjustment tank has vertically been seted up to the well right side of pillar (31), the adjustment tank is separated pillar (31) for preceding slide and back slide, spout (33) have all transversely been seted up on preceding slide and the back slide, be provided with lock ring (35) in spout (33), two be connected with back shaft (34) between lock ring (35), the outer wall middle part symmetry of back shaft (34) is provided with two grip strips (36), the adjustment tank is run through in grip strip (36), the inside right side of spout (33) is provided with supporting spring (37), the left end of supporting spring (37) is connected with the right side wall of lock ring (35).

2. The three-phase high-frequency power supply for electric furnaces as claimed in claim 1, characterized in that: the left side wall of shell body (1) is provided with access door (8), access door (8) are connected through the left side wall rotation of round pin axle with shell body (1).

3. The three-phase high-frequency power supply for electric furnaces as claimed in claim 1, characterized in that: the inner cavity lower side of the outer shell (1) is connected with a mounting bracket (13) through a screw, and a drying box (14) is arranged on the mounting bracket (13).

4. A three-phase high-frequency power supply for electric furnaces according to claim 3, characterized in that: the drying box (14) comprises a hollow shell (141), a top cover (142) is arranged at the upper end of the hollow shell (141), vent holes (143) are uniformly formed in the upper surface of the top cover (142), and a drying agent is filled in the hollow shell (141).

5. A three-phase high-frequency power supply for electric furnaces according to claim 3, characterized in that: the mounting bracket (13) is concave, and the drying box (14) is arranged in the concave part of the mounting bracket (13).

6. The three-phase high-frequency power supply for electric furnaces according to claim 1, characterized in that: be provided with cooling fan (4) on the outer wall of shell body (1), cooling fan (4) are corresponding with the position of PCB board (9), ventilation groove (15) that correspond with PCB board (9) position are seted up to the right side wall of mounting panel (2).