CN217362915U

CN217362915U - Series resonance one-driving-three intermediate frequency power supply device

Info

Publication number: CN217362915U
Application number: CN202221058656.5U
Authority: CN
Inventors: 李小军
Original assignee: Hubei Kerui Electric Co ltd
Current assignee: Hubei Kerui Electric Co ltd
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2022-09-02
Anticipated expiration: 2032-04-28

Abstract

The utility model discloses a series resonance drags three intermediate frequency power supply unit relates to firing equipment power supply unit. The inverter comprises a rectification circuit, a water-cooling heat dissipation device and three inverter circuits with consistent circuit structures; the input end of the rectification circuit is connected with a three-phase alternating current power supply, the three inverter circuits are connected to the input end of the rectification circuit in parallel through three isolation units respectively, second diodes used for preventing mutual crosstalk between the three inverter circuits are further connected between the inverter circuits and the isolation units, and the three second diodes are installed on a water-cooling heat dissipation device together. The utility model discloses rational in infrastructure, practical reliable, use in a flexible way, can effectual the cost is reduced, do benefit to the market competition who improves the product.

Description

Series resonance one-driving-three intermediate frequency power supply device

Technical Field

The utility model relates to a firing equipment power supply unit, more specifically says that it relates to series resonance one drags three intermediate frequency power supply unit.

Background

The traditional series resonance intermediate frequency power supply device comprises a rectifying circuit consisting of a plurality of controllable silicon and an inverter circuit consisting of a resonance capacitor and controllable silicon, and the specific circuit structure of the traditional series resonance intermediate frequency power supply device is shown in figure 1. The rectifying circuit of the intermediate frequency power supply device rectifies 380VAC three-phase electricity to obtain direct current with the voltage of about 510V, the direct current is inverted by the inverter circuit to obtain unidirectional alternating current, and the alternating current is input into the inductor to heat and melt metal in the furnace body.

In the circuit structure of fig. 1, the thyristors in the circuit structure are all controlled by a controller. In addition, in order to realize reasonable use of energy, the intermediate frequency power supply device is also provided with a power potentiometer connected with the controller. Through the adjustment of the power potentiometer, the controller controls the silicon controlled rectifier at the inversion end to realize the output of the intermediate frequency power supply device. For example, when metal in the furnace body is heated, the output power of the intermediate frequency power supply device is maximized through the adjustment of the power potentiometer so as to rapidly melt the metal; when the metal is melted, the output power of the medium-frequency power supply device is the minimum through the adjustment of the power potentiometer, so that the metal liquid in the furnace body is kept warm.

Because the metal in the furnace body is melted, the metal liquid with the corresponding amount is taken out according to the actual casting demand, and the metal liquid is not poured out completely at one time in most cases, so that the furnace body is occupied. Therefore, enterprises generally purchase a plurality of sets (mostly three sets) of heating equipment to meet the production requirements. When the furnace is used, the three furnaces are sequentially started at intervals to heat and melt metal in the furnace. When the metal in the first furnace (hereinafter referred to as furnace a) is completely melted, the metal liquid in furnace a can be used. While the metal in the second activated furnace (hereinafter furnace B) is already in a semi-molten state; the last furnace to start up (hereinafter furnace C) is now at the power-on heating device. And after the metal liquid in the furnace A is used up, adding the metal into the furnace A again. And at the moment, the metal in the furnace B is in a usable liquid state, while the metal in the furnace C is in a semi-molten state. The metal liquid is continuously supplied by circulating the metal liquid.

However, the heating device belongs to a high-energy consumption device, and electronic components adopted in the intermediate frequency power supply device matched with the heating device are all special electronic components, such as a thyristor, and the heating device is large in size and needs to be provided with a special radiator, so that the heating device is expensive. This also causes a problem that the cost of the heating apparatus is high. And the cost of enterprises is undoubtedly greatly increased by adopting three sets of heating equipment.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to prior art's deficiency, provides series resonance one drags three intermediate frequency power supply unit, has solved and has melted the higher problem of cost in order to satisfy the production needs through three sets of independent firing equipment to the metal.

The series resonance one-to-three intermediate frequency power supply device comprises a rectification circuit; the inverter circuit also comprises a water-cooling heat dissipation device and three inverter circuits with consistent circuit structures; the input end of the rectification circuit is connected with a three-phase alternating current power supply, the three inverter circuits are respectively connected with the input end of the rectification circuit in parallel through three isolation units, second diodes used for preventing the three inverter circuits from mutual crosstalk are further connected between the inverter circuits and the isolation units, and the three second diodes are jointly installed on a water-cooling heat dissipation device;

the water-cooling heat dissipation device comprises a heat dissipation device body and an installation shell; one side of the radiator body is provided with three mounting grooves matched with the second diodes, and the three second diodes are correspondingly mounted in the three mounting grooves one by one; the radiator comprises a radiator body, a plurality of fins, a mounting shell and a water inlet interface, wherein the other side of the radiator body is provided with the plurality of fins, the radiator body at the periphery of the fins is detachably provided with the mounting shell, the mounting shell wraps the fins, and the mounting shell is provided with the water inlet interface and the water outlet interface which are communicated with the inside of the mounting shell; the junction of installation shell and radiator body is equipped with the drainage groove, the below of radiator body is equipped with the monitoring subassembly that leaks of being connected with the drainage groove.

The water leakage monitoring assembly comprises a water collecting tank and a humidity sensor; the flow collecting groove is formed below the radiator body, the humidity sensor is installed at the bottom of the flow collecting groove, a drain hole penetrating through the radiator body is formed in the bottom of the flow collecting groove, and a rubber seal plug is inserted in the drain hole; the side wall of the flow collecting groove is provided with a sliding groove, a sealing panel used for sealing the groove surface of the flow collecting groove is movably inserted in the sliding groove, and the sealing panel is provided with an overflow hole.

The radiator body of the inner side of the drainage groove is provided with a positioning groove, the positioning groove is communicated with the drainage groove, and the depth of the drainage groove is larger than that of the positioning groove. The rubber sealing strip is installed in the positioning groove, and the installation shell is installed in the positioning groove through a fixing bolt.

The isolation unit comprises a first switch and a second switch; the first switch and the second switch are respectively connected with two output ends of the rectifying circuit in a one-to-one correspondence mode.

Advantageous effects

The utility model has the advantages that: because intermediate frequency power supply unit has adopted the mode that a rectifier circuit and three inverter circuit are connected, compare in traditional mode that adopts three sets of independent intermediate frequency power supply unit, the utility model discloses two rectifier circuits and the required cost of corresponding radiator have been saved, consequently can effectual the cost is reduced. In addition, to the second diode that increases in inverter circuit and rectifier circuit, the utility model discloses a water-cooling heat abstractor has realized the heat dissipation to three second diode promptly, has realized further reducing manufacturing cost.

Drawings

FIG. 1 is a schematic diagram of a conventional IF power supply circuit;

fig. 2 is a schematic diagram of the structure of the intermediate frequency power supply of the present invention;

fig. 3 is a schematic circuit diagram of the inverter circuit and the isolation unit of the present invention;

fig. 4 is a schematic view of the interior overlooking structure of the water-cooling heat dissipation device of the present invention;

fig. 5 is a schematic view of the back structure of the water-cooling heat dissipation device of the present invention;

FIG. 6 is a schematic cross-sectional view taken at A-A in FIG. 5;

fig. 7 is an enlarged schematic view of a structure at B in fig. 6.

Wherein: the heat radiator comprises a heat radiator body 1, a heat radiator body 2, a mounting groove 2, a fin 3, a rubber sealing strip 4, a mounting shell 5, a water inlet port 6, a water outlet port 7, a drainage groove 8, a water collecting groove 9, a humidity sensor 10, a rubber sealing plug 11, a sliding groove 12, a sealing panel 13 and an overflow hole 14.

Detailed Description

The present invention will be further described with reference to the following examples, which are not intended to limit the scope of the present invention, but are intended to be covered by the appended claims in any way.

Referring to fig. 2-3, the series resonance one-to-three intermediate frequency power supply device of the present invention includes a rectifier circuit, a water-cooling heat dissipation device, and an inverter circuit with three circuit structures consistent with each other. The input end of the rectification circuit is connected with a three-phase alternating current power supply. The three-phase alternating current power supply adopts conventional 380VAC three-phase power. In addition, the present invention does not improve the rectifier circuit and the inverter circuit, and the circuit connection relationship and the operation principle are common knowledge in the art, so that no further discussion is made herein.

The input end of the rectifying circuit is connected with a three-phase alternating current power supply, the three inverter circuits are connected to the input end of the rectifying circuit in parallel through three isolation units respectively, and a second diode D2 used for preventing mutual crosstalk between the three inverter circuits is further connected between the inverter circuits and the isolation units. The three inverter circuits respectively realize one-to-one heating for the three furnace bodies. In addition, three power potentiometers for controlling the three furnace bodies are required to be arranged on the controller.

When the furnace A is used, the inverter circuit corresponding to the furnace A can be started firstly, after the metal in the furnace A is melted, the furnace A is in a heat preservation state through the corresponding power potentiometer, and then the inverter circuit of the furnace B is started to heat the metal in the furnace B. It should be noted that, since the heat preservation of the furnace a consumes a part of the power of the rated output power of the intermediate frequency power supply device, the output power of the inverter circuit of the furnace B is lower than the rated power of the intermediate frequency power supply device, but the metal in the furnace B can still be heated and melted. And when the metal in the furnace B is in a semi-molten state, starting the furnace C to keep the furnace C in a heat preservation state, and preheating the metal in the furnace C. And when the metal in the furnace B is completely melted, adjusting the furnace B into a heat preservation mode through a power potentiometer, and simultaneously adjusting the power potentiometer corresponding to the furnace C to enable the inverter circuit of the furnace C to output power obtained by subtracting the heat preservation power of the two furnaces from the rated power. Through the circulation, the metal liquid in one or two furnace bodies can be always ensured, thereby ensuring the continuity of casting.

It should be noted that, two power potentiometers are additionally arranged on the basis of the traditional intermediate frequency power supply device and the controller thereof, the function of the added power potentiometer and the control process of the inverter circuit all follow the prior art, the utility model discloses do not improve it, so do not do more discussion yet. Furthermore, the utility model discloses an intermediate frequency power supply unit's output can be unanimous with traditional intermediate frequency power supply unit's output. The casting time is long, and practical tests show that even if the output power of the intermediate frequency power supply device is not increased, when the three inverter circuits are all enabled to output according to the heating mode, the metal can be heated and melted for a long time, but the requirement of the required casting amount can still be met.

Compared with three sets of independent heating equipment, the intermediate frequency power supply device of the embodiment reduces the use of two rectifying circuits, thereby effectively reducing the cost of the heating equipment. For example, the general KP-800A flat thyristor in the rectifier circuit is purchased at about 260 yuan, while six thyristors are required for one rectifier circuit, and each thyristor needs to be equipped with a corresponding heat sink. To sum up, the price of a rectifying circuit will be around 2000-3000 Yuan RMB. Therefore, the utility model discloses reduce two rectifier circuit's use, realized the purpose that reduces equipment cost. In addition, because the rated power is unchanged, a user can realize the simultaneous work of three furnace bodies under the condition of not increasing the capacity of the transformer, the upgrading of equipment can be completed without transforming the transformer and a circuit, and the use of the user is greatly facilitated.

The isolation unit of the present embodiment includes a first switch S1 and a second switch S2. The first switch S1 and the second switch S2 are respectively connected to two output ends of the rectifying circuit in a one-to-one correspondence. Namely, a switch is arranged at the joint of each inverter circuit and the rectifying circuit. When any one furnace body or the inverter circuit breaks down, the isolating switch is disconnected during maintenance, and the other two furnace bodies can be ensured to work normally.

In order to reduce the cost caused by the added devices of the intermediate frequency power supply device of this embodiment, the three second diodes D2 are commonly mounted on a water-cooled heat dissipation device in this embodiment. Through integrated form installation and water-cooling's mode, the cost of the corresponding radiator of effectual reduction purchase can be simultaneously through the water-cooling mode can dispel the heat to second diode D2 better.

Referring to fig. 4 to 7, the water-cooled heat sink includes a heat sink body 1 and a mounting case 5. One side of the radiator body 1 is provided with three mounting grooves 2 matched with the second diodes D2, and the three second diodes D2 are correspondingly mounted in the three mounting grooves 2. The other side of the radiator body 1 is provided with a plurality of fins 3, a mounting shell 5 is detachably mounted on the radiator body 1 at the periphery of the fins 3, the fins 3 are wrapped by the mounting shell 5, and a water inlet port 6 and a water outlet port 7 which are communicated with the inside of the mounting shell 5 are arranged on the mounting shell 5. The water inlet interface 6 is used for being connected with external water supply equipment, and the water outlet interface 7 is used for draining water. The cooling water in the water-cooling heat dissipation device is supplied by the external water supply equipment, so that the heat transferred to the radiator body 1 and the fins 3 by the second diode D2 can be effectively taken away, and the second diode D2 can be cooled.

Preferably, the fin 3 is provided with a plurality of through holes.

The junction of installation shell 5 and radiator body 1 is equipped with drainage groove 8. Because water-cooling heat abstractor is the easiest appearance that leaks in the junction of installation shell 5 and radiator body 1, consequently set up drainage groove 8, when its junction appears leaking, through drainage effect in drainage groove 8, will can effectually guide the water that leaks out to the mass flow groove 9 of the monitoring subassembly that leaks in. A water leakage monitoring assembly connected with the drainage groove 8 is arranged below the radiator body 1. The water leakage monitoring assembly is used for monitoring whether the water-cooling heat dissipation device leaks or not so that a user can find water leakage in time and the problem of short circuit caused by water leakage of the water-cooling heat dissipation device is avoided.

Specifically, the water leakage monitoring assembly includes a collecting tank 9 and a humidity sensor 10. Collecting tank 9 sets up in the below of radiator body 1, and humidity transducer 10 installs in collecting tank 9's bottom, and humidity transducer 10 passes through the controller to be connected with audible-visual annunciator to send the warning when realizing that water-cooling heat abstractor leaks water. The bottom of the collecting groove 9 is provided with a drain hole which runs through the radiator body 1, so that the collecting groove 9 can be drained conveniently. The emptying hole is inserted with a rubber plug 11 for sealing the emptying hole. The side wall of the collecting groove 9 is provided with a sliding groove 12, a closed panel 13 used for closing the groove surface of the collecting groove 9 is movably inserted in the sliding groove 12, and the closed panel 13 is provided with an overflow hole 14. A water storage tank can be formed in the collecting tank 9 through the closed panel 13, so that the humidity sensor 10 can be used for monitoring the humidity condition in the collecting tank 9 in time.

When water leakage occurs at the joint of the mounting shell 5 and the radiator body 1, the water enters the drainage groove 8 and enters the flow collecting groove 9 under the guidance of the drainage groove 8. Water accumulates in the header tank 9 due to the closure of the header tank 9 by the closure panel 13. When the humidity sensor 10 detects the presence of water in the sump 9, it will signal the controller. And then, the controller sends out an alarm signal and alarms through an audible and visual alarm.

Preferably, the closing panel 13 is a transparent glass plate to facilitate the user's observation of the presence of water in the interior of the header tank 9.

In this embodiment, seted up the constant head tank on the radiator body 1 of 8 inboards in drainage groove, the constant head tank is linked together with drainage groove 8, and the degree of depth in drainage groove 8 is greater than the degree of depth of constant head tank, installs rubber seal strip 4 in the constant head tank, and installation shell 5 passes through fixing bolt to be installed in the constant head tank. Such arrangement is beneficial to the water entering the drainage groove 8 effectively when water leakage occurs at the joint of the mounting shell 5 and the radiator body 1.

The above is only the preferred embodiment of the present invention, and it should be noted that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which will not affect the utility model and the utility of the patent.

Claims

1. The series resonance one-to-three intermediate frequency power supply device comprises a rectifying circuit; the inverter is characterized by further comprising a water-cooling heat dissipation device and three inverter circuits with consistent circuit structures; the input end of the rectification circuit is connected with a three-phase alternating current power supply, the three inverter circuits are respectively connected with the input end of the rectification circuit in parallel through three isolation units, a second diode used for preventing mutual crosstalk among the three inverter circuits is also connected between the inverter circuits and the isolation units, and the three second diodes are jointly installed on a water-cooling heat dissipation device;

the water-cooling heat dissipation device comprises a heat radiator body and an installation shell; one side of the radiator body is provided with three mounting grooves matched with the second diodes, and the three second diodes are correspondingly mounted in the three mounting grooves one by one; the radiator comprises a radiator body, a plurality of fins, a mounting shell and a water inlet interface, wherein the other side of the radiator body is provided with the plurality of fins, the radiator body at the periphery of the fins is detachably provided with the mounting shell, the mounting shell wraps the fins, and the mounting shell is provided with the water inlet interface and the water outlet interface which are communicated with the inside of the mounting shell; the junction of installation shell and radiator body is equipped with the drainage groove, the below of radiator body is equipped with the monitoring subassembly that leaks of being connected with the drainage groove.

2. The series resonance one-drive-three intermediate frequency power supply device according to claim 1, wherein the water leakage monitoring component comprises a current collecting tank and a humidity sensor; the flow collecting groove is formed below the radiator body, the humidity sensor is installed at the bottom of the flow collecting groove, a drain hole penetrating through the radiator body is formed in the bottom of the flow collecting groove, and a rubber seal plug is inserted in the drain hole; the side wall of the flow collecting groove is provided with a sliding groove, a sealing panel used for sealing the groove surface of the flow collecting groove is movably inserted in the sliding groove, and the sealing panel is provided with an overflow hole.

3. The series-resonant one-drive-three intermediate-frequency power supply device according to claim 2, wherein the closing panel is a transparent glass plate.

4. The series resonance one-driving-three intermediate frequency power supply device according to claim 2, wherein a positioning groove is formed in the radiator body on the inner side of the drainage groove, the positioning groove is communicated with the drainage groove, a rubber sealing strip is installed in the positioning groove, and the installation shell is installed in the positioning groove through a fixing bolt.

5. The series-resonant one-drive-three intermediate-frequency power supply device according to claim 4, wherein the depth of the drainage groove is greater than that of the positioning groove.

6. The series-resonant one-driving-three intermediate frequency power supply device according to claim 5, wherein the isolation unit includes a first switch and a second switch; the first switch and the second switch are respectively connected with two output ends of the rectifying circuit in a one-to-one correspondence mode.