CN213661462U - High-voltage isolation power supply device - Google Patents

Abstract

The utility model discloses a high-voltage isolation power supply device, belong to the power supply unit field, including the low potential circuit board, the high potential circuit board, high-voltage isolation transformer and casing, the casing is including the last casing of adjacent setting in proper order from top to bottom, the main casing body reaches casing down, high potential circuit board and low potential circuit board are installed respectively on the upper and lower terminal surface of the main casing body, go up the middle part of casing and offer the last logical groove with the all side looks adaptations of high potential circuit board, the lower logical groove with all side looks adaptations of low potential circuit board is offered at the middle part of casing down, go up the week side of casing and be fixed with the last connecting block, week side of casing is fixed with down the connecting block down. The utility model discloses a components of a whole that can function independently assembled casing, the installation of the low potential circuit board and the high potential circuit board of can being convenient for, and can strengthen the installation stability of high potential circuit board and low potential circuit board, can also strengthen the connection stability between each part casing.

Description

High-voltage isolation power supply device

Technical Field

The utility model relates to a power supply unit field, specificly relate to a high voltage isolation power supply unit.

Background

The rapid development of national economy provides a wide market for power electronic equipment such as a high-voltage frequency converter, a static var compensator STATCOM (static var compensator), a high-voltage direct-current power supply, a medium-high voltage wind power converter and/or a light direct-current transmission converter and the like which are formed by adopting an H-bridge power unit series topology or an MMC power unit series topology; however, it is a bottleneck and a problem in the development of high-voltage large-capacity power electronic devices to provide a reliable control power supply and an intermediate dc support capacitor initial charging power supply with a certain power to the control circuit of the power unit at a high potential, the signal detection circuit and the driving circuit of the power semiconductor element in the above power electronic devices.

At present, the initial soft charging of the intermediate direct-current support capacitor for solving the high-potential power unit at home and abroad mainly adopts the following technical scheme: the initial soft charging of the intermediate direct current supporting capacitor of the high-potential power unit is realized by adopting the high-voltage resistor and the high-voltage bypass contactor, but the intermediate direct current link of the equipment with the voltage of more than 25kV is difficult to realize reliably due to high cost and large occupied space.

In patent with publication number CN203056980U, a high-voltage isolated power supply device is disclosed, which rectifies the input power frequency ac power by a low potential circuit board and inverts the rectified ac power into a high-frequency square wave ac voltage, thereby greatly improving the power/volume ratio; high-voltage isolation transformer coupling is adopted, so that high-efficiency isolation and conversion of electric energy from a low potential side to a high potential side are realized; the shell is cast by epoxy resin, and the open type circuit board installation chamber provided with the low-potential circuit board and the high-potential circuit board, the high-voltage isolation transformer and the installation insert are cast and molded at one time and encapsulated in the shell, so that the sufficient insulation strength and mechanical strength are ensured; the corrugated insulating umbrella skirt is arranged on the surface of the shell, so that the creepage distance is increased, creepage or discharge can be effectively prevented, and the reliability and the safety are improved; copper inserts which are arranged at the bottom and the top of the shell and are communicated through a lead are used for mounting and fixing the device, wherein the copper inserts at the bottom of the shell also have a safety grounding function; the device can be directly applied to the control power supply of a high-potential power unit of 35kV or below and the initial soft charging of an intermediate direct-current capacitor, has the characteristics of good performance, small volume, low cost, simple manufacture, convenient use, safety and reliability, and is suitable for wide popularization. However, it has the following problems: because the upper and lower ends of the shell are both provided with the inwards concave open type circuit board installation chambers, and the depth of the installation chambers is obviously greater than the thickness of the circuit board, the installation of the low potential circuit board and the high potential circuit board is inconvenient.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

The to-be-solved technical problem of the utility model is to provide a high voltage isolation power supply unit, it adopts components of a whole that can function independently assembled casing, can be convenient for the installation of low potential circuit board and high potential circuit board, and can strengthen the installation stability of high potential circuit board and low potential circuit board, can also strengthen the connection stability between each part casing.

2. Technical scheme

In order to solve the above problem, the utility model adopts the following technical scheme:

a high-voltage isolation power supply device comprises a low potential circuit board, a high-voltage isolation transformer and a shell, wherein the high-voltage isolation transformer is arranged in the shell, the high potential circuit board and the low potential circuit board are respectively arranged at the upper end and the lower end of the shell, the top and the bottom of the shell are respectively and correspondingly provided with an upper installation insert and a lower installation insert, and the surface of the shell is provided with a corrugated insulating umbrella skirt; the casing is including last casing, the main casing body and the casing down of adjacent setting in proper order from top to bottom, the main casing body is located to high-pressure isolation transformer, insulating full skirt is located on the main casing body, the high potential circuit board is installed on main casing body up end through last wiring inserts, the low potential circuit board is installed on the terminal surface under the main casing body through lower wiring inserts, go up the middle part of casing and offer the last logical groove with all sides looks adaptation of high potential circuit board, the lower logical groove with all sides looks adaptations of low potential circuit board is offered at the middle part of casing down, go up all sides equidistant being fixed with two at least last connecting blocks of going up of casing, all be fixed with the lower connecting block with last connecting block one-to-one in week of casing down, every go up all be connected with the connecting piece.

Further, the connecting piece includes the stay bolt that runs through corresponding connecting block and lower connecting block simultaneously to and the fastening nut of screw thread suitability suit at the stay bolt head end, just one side that fastening nut moves towards the stay bolt tail end is equipped with the gasket of suit on the stay bolt, all set up the perforation that supplies the stay bolt to pass on connecting block and the lower connecting block. Go through simultaneously through the last connecting block that vertically aligns and put up gasket and fastening nut on the stay bolt behind the connecting block down through the stay bolt to fastening nut screws, make gasket and nut support respectively and tightly go up connecting block and connecting block down, make promptly to go up the casing and the casing is tightly centre gripping main casing down, can realize the holistic equipment of casing.

Further, the main internal main appearance chamber that is equipped with of main casing, go up the internal chamber and the lower chamber of holding that corresponds respectively of casing and inferior valve, the last opening one and the lower opening one that communicate with main appearance chamber are seted up to the upper and lower terminal surface of the main casing body respectively corresponding, the last opening two to last opening one is seted up to the lower extreme of going up the casing, the lower opening two to lower opening one is seted up to the upper end of casing down. Will go up the casing, the main casing body and the casing concatenation is accomplished the back down, go up opening one and last opening two and link up and communicate, opening one links up and communicates with opening two down, then during the pouring epoxy, through last opening one and last opening two and the lower opening one and the lower opening two of intercommunication, can upwards hold the chamber, main appearance chamber and lower appearance intracavity pouring epoxy, treat the epoxy solidification back, it links together with last opening two through last opening one and the last opening two to go up the epoxy that holds the chamber and main appearance intracavity, the epoxy that holds the chamber and main appearance intracavity down links together through opening one and opening two down, then prevent the casing through the epoxy that solidifies, lower casing and main casing body separation, play the reinforcing and go up the casing, the effect of connection stability between the main casing body and the lower casing.

Furthermore, an upper extending ring body connected with an upper port of the first upper port is fixed at the upper end of the main shell, and the upper extending ring body can penetrate through the second upper port; the lower extreme of main casing body is fixed with the lower extension ring body that links up in port under, just the port two under the lower extension ring body can pass. When the upper shell, the main shell and the lower shell are spliced, the upper extension ring body can be inserted into the upper through hole II, so that the splicing accuracy between the upper shell and the main shell can be ensured, and deviation is prevented; the lower extension ring body can be inserted into the lower port two, so that the splicing accuracy between the lower shell and the main shell can be ensured, and the deviation is prevented. In addition, after epoxy pours, the inboard of extending ring body and lower extension ring body is filled with epoxy, and the outside parcel of extending ring body and lower extension ring body has epoxy on, treats the epoxy solidification back, can strengthen the stability of being connected of casing, lower casing and main casing body.

Furthermore, an upper pressure groove which is just clamped with the high-potential circuit board is formed on the inner side of the upper shell corresponding to the lower part of the upper through groove, and an upper pressure block which extends towards the inner side and is pressed on the peripheral edge of the high-potential circuit board is formed on the inner side of the upper shell corresponding to the upper through groove; the upper portion shaping that the lower casing internal side corresponds logical groove down has the lower indent that just with the block of low potential circuit board, and the lower part shaping that the lower casing internal side corresponds logical groove down extends to the inboard and presses the lower briquetting in low potential circuit board week side edge. During installation, the upper pressure groove is convenient to accommodate the high-potential circuit board, and the upper pressure block is pressed at the peripheral edge of the high-potential circuit board, so that the installation stability of the high-potential circuit board can be promoted; the arrangement of the lower pressing groove is convenient for accommodating the low potential circuit board, and the lower pressing block is pressed at the edge of the periphery of the low potential circuit board, so that the installation stability of the low potential circuit board can be promoted.

Furthermore, the upper end face and the lower end face of the main shell are respectively and correspondingly provided with an upper mounting chamber and a lower mounting chamber which are concave inwards, the depth of the upper mounting chamber is smaller than the thickness of the high-potential circuit board, and the depth of the lower mounting chamber is smaller than the thickness of the low-potential circuit board. The upper mounting chamber and the lower mounting chamber are arranged to facilitate the determination of the mounting positions of the high-potential circuit board and the low-potential circuit board, and the upper mounting chamber and the lower mounting chamber are shallow in depth to prevent inconvenience in the mounting of the corresponding circuit boards.

Further, the upper connecting block and the upper shell are integrally formed, and the lower connecting block and the lower shell are integrally formed. The connection block can be prevented from being separated from the corresponding housing, so that the connection stability between the upper and lower housings can be secured.

3. Advantageous effects

(1) The utility model discloses divide into the casing and set gradually the upper casing from top to bottom, the main casing body and casing down, during the application, install high potential circuit board and low potential circuit board respectively in the upper and lower end of the main casing body earlier, then will go up the casing and the last lower extreme of casing difference concatenation at the main casing body down, notice and make high potential circuit board be located logical inslot, low potential circuit board is located logical inslot down, casing and casing down are being connected to the rethread connecting piece, go up the casing and tightly centre gripping the main casing body down, effectively realize the holistic equipment of casing. When the circuit board is installed, because the periphery of the corresponding circuit board is not blocked by the shell, the space of the periphery of the circuit board is larger, and the low-potential circuit board and the high-potential circuit board are convenient to install.

(2) The utility model discloses be equipped with indent and last briquetting in last casing, be equipped with indent and briquetting down in the lower casing, during the application, go up the indent and be convenient for hold high potential circuit board and low potential circuit board with setting up of indent down, and go up the briquetting and press the briquetting respectively in all sides of corresponding circuit board edge with lower, can strengthen the installation stability of high potential circuit board and low potential circuit board.

(3) The utility model discloses an go up between casing and the main casing body through last opening one and two intercommunications of last opening, through opening one and two intercommunications of lower opening between casing and the main casing body down, during the application, to pouring epoxy in the casing, treat the epoxy solidification back, the inboard epoxy integrated into one piece that holds the intracavity of each casing can strengthen the connection stability between casing, the main casing body and the casing down.

To sum up, the utility model discloses a components of a whole that can function independently assembled casing, the installation of the low potential circuit board and the high potential circuit board of can being convenient for, and can strengthen the installation stability of high potential circuit board and low potential circuit board, can also strengthen the connection stability between each partial casing.

Drawings

Fig. 1 is a structural sectional view of the present invention taken along a vertical central plane in example 1;

fig. 2 is a schematic view of the external structure of the present invention in example 1;

fig. 3 is a structural sectional view of the upper case 8, the main case 2, and the lower case 9 in embodiment 1 taken along a vertical center plane in a separated state;

fig. 4 is a structural sectional view of the upper case 8, the main case 2, and the lower case 9 in embodiment 2 taken along a vertical center plane in a separated state.

Reference numerals: 1. a lower connecting block; 2. a main housing; 21. a main cavity; 22. a lower mounting chamber; 23. an upper mounting chamber; 3. a long bolt; 4. an insulating shed; 5. a gasket; 6. fastening a nut; 7. an upper connecting block; 8. an upper housing; 81. an upper cavity; 9. a lower housing; 91. a lower cavity; 10. a low potential circuit board; 11. a high voltage isolation transformer; 12. an upper through groove; 13. a high potential circuit board; 14. an upper wiring insert; 15. connecting a wiring insert; 16. a lower through groove; 17. pressing the block; 18. pressing the groove downwards; 19. pressing the groove upwards; 20. perforating; 30. pressing the blocks; 31. a second lower port; 32. a lower extension ring body; 33. a first lower port; 34. an upper port I; 35. an upper extension ring body; 36. and a second upper port.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

As shown in fig. 1 and 2, the high-voltage isolation power supply device includes a low potential circuit board 10, a high potential circuit board 13, a high voltage isolation transformer 11 and a housing, wherein the high voltage isolation transformer 11 is installed in the housing, the high potential circuit board 13 and the low potential circuit board 10 are respectively installed at the upper end and the lower end of the housing, the top and the bottom of the housing are respectively and correspondingly provided with an upper installation insert and a lower installation insert (not shown in the figure), and the surface of the housing is provided with a corrugated insulating umbrella skirt 4; the shell comprises an upper shell 8, a main shell 2 and a lower shell 9 which are sequentially arranged from top to bottom, a main containing cavity 21 is arranged in the main shell 2, an upper containing cavity 81 and a lower containing cavity 91 are respectively and correspondingly arranged in the upper shell 8 and the lower shell 9, through holes for pouring epoxy resin are respectively arranged on the upper shell 8, the main shell 2 and the lower shell 9, the high-voltage isolation transformer 11 is arranged in the main shell 2, the insulating umbrella skirt 4 is arranged on the main shell 2, the high-potential circuit board 13 is arranged on the upper end surface of the main shell 2 through an upper wiring insert 14, the low-potential circuit board 10 is arranged on the lower end surface of the main shell 2 through a lower wiring insert 15, an upper through groove 12 matched with the peripheral side of the high-potential circuit board 13 is arranged in the middle of the upper shell 8, a lower through groove 16 matched with the peripheral side of, go up casing 8's week side equidistant being fixed with two at least last connecting blocks 7 (only show two in the figure connecting blocks 7), the week side of casing 9 is fixed with the lower connecting block 1 with last connecting block 7 one-to-one down, every go up all be connected with the connecting piece between connecting block 7 and the corresponding lower connecting block 1, go up the installation inserts and install at 8 tops of last casing, install the inserts installation casing 9 bottom down.

In this embodiment, as shown in fig. 1 and fig. 2, the connecting member includes a long bolt 3 penetrating through corresponding upper connecting block 7 and lower connecting block 1, and a fastening nut 6 screwed on the head end of the long bolt 3, and a gasket 5 screwed on the long bolt 3 is provided on one side of the fastening nut 6 facing the tail end of the long bolt 3, and through holes 20 for the long bolt 3 to pass through are provided on the upper connecting block 7 and the lower connecting block 1. Go through the last connecting block 7 that vertically aligns simultaneously through stay bolt 3 and sheathe gasket 5 and fastening nut 6 on stay bolt 3 after connecting block 1 down to fastening nut 6 screws, make gasket 5 and nut support respectively and tightly go up connecting block 7 and connecting block 1 down, make promptly that the main casing body 2 is tightly being held to last casing 8 and lower casing 9, can effectively realize the holistic equipment of casing.

In this embodiment, the upper connecting block 7 is integrally formed with the upper housing 8, and the lower connecting block 1 is integrally formed with the lower housing 9. The joint blocks are prevented from being separated from the corresponding housings, so that the stability of the coupling between the upper and lower housings 8 and 9 can be secured.

In the present embodiment, as shown in fig. 3, an upper pressure groove 19 that is just engaged with the high-potential circuit board 13 is formed on the inner side of the upper housing 8 corresponding to the lower portion of the upper through groove 12, and an upper pressure block 30 that extends inward and presses the peripheral edge of the high-potential circuit board 13 is formed on the inner side of the upper housing 8 corresponding to the upper portion of the upper through groove 12; a lower pressing groove 18 which is just clamped with the low potential circuit board 10 is formed on the inner side of the lower shell 9 corresponding to the upper part of the lower through groove 16, and a lower pressing block 17 which extends towards the inner side and presses the edge of the periphery of the low potential circuit board 10 is formed on the inner side of the lower shell 9 corresponding to the lower part of the lower through groove 16. During installation, as shown in fig. 1, the upper pressing groove 19 is arranged to accommodate the high-potential circuit board 13, and the upper pressing block 30 presses the peripheral edge of the high-potential circuit board 13, so as to promote the installation stability of the high-potential circuit board 13; the lower press groove 18 is provided to accommodate the low potential circuit board 10, and the lower press block 17 is pressed against the peripheral side edge of the low potential circuit board 10, which can promote the mounting stability of the low potential circuit board 10.

In this embodiment, as shown in fig. 3, the upper and lower end surfaces of the main housing 2 are respectively provided with an upper mounting chamber 23 and a lower mounting chamber 22, which are concave, the depth of the upper mounting chamber 23 is smaller than the thickness of the high potential circuit board 13, and the depth of the lower mounting chamber 22 is smaller than the thickness of the low potential circuit board 10. The upper and lower installation chambers 23 and 22 are provided to facilitate the installation of the high and low potential circuit boards 13 and 10, and the upper and lower installation chambers 23 and 22 have shallow depths to prevent inconvenience in the installation of the corresponding circuit boards.

The specific application process of the high-voltage isolation power supply device is as follows:

during assembly, after the high-voltage isolation transformer 11 is installed in the main housing 2, the high-potential circuit board 13 and the low-potential circuit board 10 are installed at the upper end and the lower end of the main housing 2 in sequence, then epoxy resin is poured into the main cavity 21 through the through holes on the main housing 2, the upper housing 8 and the lower housing 9 are respectively provided with the upper installation insert and the lower installation insert, epoxy resin is poured into the upper cavity 81 and the lower cavity 91 respectively and correspondingly through the through holes on the upper housing 8 and the lower housing 9 respectively, after the epoxy resin is solidified, the upper housing 8 and the lower housing 9 are respectively lapped at the upper end and the lower end of the main housing 2, attention is paid to ensure that the high-potential circuit board 13 is positioned in the upper through groove 12 and the low-potential circuit board 10 is positioned in the lower through groove 16, then the long bolts 3 are respectively passed through the lower connecting block 1 and the upper connecting block 7, the gaskets 5 and the fastening nuts 6 are sleeved, and the, namely, the upper casing 8 and the lower casing 9 tightly clamp the main casing 2, and the whole casing is effectively assembled. At this time, the upper press block 30 presses the peripheral side edge of the high potential circuit board 13, which can promote the mounting stability of the high potential circuit board 13, and the lower press block 17 presses the peripheral side edge of the low potential circuit board 10, which can promote the mounting stability of the low potential circuit board 10.

In use, the upper and lower mounting inserts are used to mount and secure the device, wherein the lower mounting insert simultaneously serves as a safety ground. The input power frequency alternating current is rectified and inverted into high-frequency square wave alternating current voltage through the low potential circuit board 10, so that the power/volume ratio is greatly improved; the high-voltage isolation transformer 11 is adopted for coupling, so that efficient isolation and conversion of electric energy from a low-potential side to a high-potential side are realized, and the high-potential circuit board 13 directly outputs high-frequency square wave alternating-current voltage output by the high-voltage isolation transformer 11 or outputs direct-current voltage after rectification and filtering, so that direct-current electric energy or alternating-current electric energy is provided for a high-potential load; adopt the casing surface to be equipped with corrugated insulating full skirt 4, increase creepage distance, can effectively prevent creepage or discharge, improve reliability and security.

Example 2

The present embodiment is different from embodiment 1 in that:

in this embodiment, as shown in fig. 4, the upper end surface and the lower end surface of the main housing 2 are respectively provided with a first upper port 34 and a first lower port 33 which are communicated with the main cavity 21, the lower end of the upper housing 8 is provided with a second upper port 36 which is over against the first upper port 34, the upper end of the lower housing 9 is provided with a second lower port 31 which is over against the first lower port 33, and the upper end of the upper housing 8 and the lower end of the lower housing 9 are respectively provided with ports for casting. After the upper shell 8, the main shell 2 and the lower shell 9 are spliced, the first upper port 34 is connected and communicated with the second upper port 36, the first lower port 33 is connected and communicated with the second lower port 31, then, when the epoxy resin is poured, through the communicated first upper port 34 and second upper port 36 and the communicated first lower port 33 and second lower port 31, epoxy resin can be poured into the upper cavity 81, the main cavity 21 and the lower cavity 91, and after the epoxy resin is solidified, the epoxy resin in the upper chamber 81 and the main chamber 21 are connected together through the first upper port 34 and the second upper port 36, the epoxy resin in the lower chamber 91 and the main chamber 21 are connected together through the first lower port 33 and the second lower port 31, the separation of the upper and lower cases 8 and 9 from the main case 2 is prevented by the solidified epoxy resin, and the effect of enhancing the stability of the connection between the upper and lower cases 8 and 9 and the main case 2 is achieved.

In this embodiment, as shown in fig. 4, an upper extension ring 35 connected to an upper port of the first upper opening 34 is fixed to the upper end of the main housing 2, and the upper extension ring 35 can pass through the second upper opening 36; the lower extreme of main casing body 2 is fixed with the lower extension ring body 32 that links up port under lower opening 33, just the lower extension ring body 32 can pass through two 31 of lower opening. When the upper shell 8, the main shell 2 and the lower shell 9 are spliced, the upper extension ring body 35 can be inserted into the second upper opening 36, so that the splicing accuracy between the upper shell 8 and the main shell 2 can be ensured, and deviation is prevented; the lower extension ring body 32 can be inserted into the second lower opening 31, so that the splicing accuracy between the lower shell 9 and the main shell 2 can be ensured, and the deviation can be prevented. In addition, after epoxy resin pouring, the inboard of extending ring 35 and the ring 32 that extends down on, and the outside parcel of extending ring 35 and the ring 32 that extends down on has epoxy resin, treats the epoxy solidification back, can strengthen the stability of being connected of upper shell 8, lower casing 9 and main casing 2.

Otherwise, the same procedure as in example 1 was repeated.

The specific application process of the high-voltage isolation power supply device is as follows:

during assembly, after the high-voltage isolation transformer 11 is installed in the main casing 2, the high-potential circuit board 13 and the low-potential circuit board 10 are sequentially installed at the upper end and the lower end of the main casing 2, then the upper casing 8 and the lower casing 9 are respectively lapped at the upper end and the lower end of the main casing 2, attention is paid to enabling the high-potential circuit board 13 to be located in a cavity formed by splicing the upper pressure groove 19 and the upper installation chamber 23, the low-potential circuit board 10 to be located in a cavity formed by splicing the lower pressure groove 18 and the lower installation chamber 22, then the long bolts 3 penetrate through the lower connecting block 1 and the upper connecting block 7 one by one, the gasket 5 and the fastening nut 6 are sleeved, the fastening nut 6 is screwed, the gasket 5 and the nut respectively abut against the upper connecting block 7 and the lower connecting block 1, namely the upper casing 8 and the lower casing 9. At this time, the upper press block 30 presses the peripheral side edge of the high potential circuit board 13, which can promote the mounting stability of the high potential circuit board 13, and the lower press block 17 presses the peripheral side edge of the low potential circuit board 10, which can promote the mounting stability of the low potential circuit board 10; go up and extend in the ring body 35 inserts the second 36 of last opening, the lower extension ring body 32 inserts down in the second 31 of opening, can ensure the concatenation accuracy between last casing 8, lower casing 9 and the main casing body 2, prevents the off normal. Finally, the upper mounting insert and the lower mounting insert are respectively mounted on the upper shell 8 and the lower shell 9, epoxy resin is poured into the shells through a through hole at the upper end of the upper shell 8 or the lower end of the lower shell 9 (when the through hole at the upper end of the upper shell 8 is selected, the through hole at the lower end of the lower shell 9 is blocked, and when the through hole at the lower end of the lower shell 9 is selected, the through hole at the upper end of the upper shell 8 is blocked), and after the epoxy resin is solidified, the epoxy resin in the upper cavity 81, the main cavity 21 and the lower cavity 91 is integrally formed, so that the connection stability among the upper shell 8, the main shell 2 and the.

In use, the upper and lower mounting inserts are used to mount and secure the device, wherein the lower mounting insert simultaneously serves as a safety ground. The input power frequency alternating current is rectified and inverted into high-frequency square wave alternating current voltage through the low potential circuit board 10, so that the power/volume ratio is greatly improved; the high-voltage isolation transformer 11 is adopted for coupling, so that efficient isolation and conversion of electric energy from a low-potential side to a high-potential side are realized, and the high-potential circuit board 13 directly outputs high-frequency square wave alternating-current voltage output by the high-voltage isolation transformer 11 or outputs direct-current voltage after rectification and filtering, so that direct-current electric energy or alternating-current electric energy is provided for a high-potential load; adopt the casing surface to be equipped with corrugated insulating full skirt 4, increase creepage distance, can effectively prevent creepage or discharge, improve reliability and security.

As can be seen from the above, the present invention adopts the split assembled housing, which can facilitate the installation of the low potential circuit board and the high potential circuit board, enhance the installation stability of the high potential circuit board and the low potential circuit board, and enhance the connection stability between the housings of the respective parts.

It should be understood by those skilled in the art that the above embodiments are only used for illustrating the present invention and are not used as limitations of the present invention, and that changes and modifications to the above embodiments are within the scope of the appended claims as long as they are within the true spirit of the present invention.

Claims (7)

1. A high-voltage isolation power supply device comprises a low potential circuit board (10), a high potential circuit board (13), a high voltage isolation transformer (11) and a shell, wherein the high voltage isolation transformer (11) is arranged in the shell, the high potential circuit board (13) and the low potential circuit board (10) are respectively arranged at the upper end and the lower end of the shell, the top and the bottom of the shell are respectively and correspondingly provided with an upper installation insert and a lower installation insert, and the surface of the shell is provided with a corrugated insulating umbrella skirt (4); the high-voltage isolation transformer comprises an upper shell (8), a main shell (2) and a lower shell (9), wherein the upper shell (8), the main shell (2) and the lower shell (9) are sequentially and closely arranged from top to bottom, a high-voltage isolation transformer (11) is arranged inside the main shell (2), an insulating umbrella skirt (4) is arranged on the main shell (2), a high-potential circuit board (13) is arranged on the upper end surface of the main shell (2) through an upper wiring insert (14), a low-potential circuit board (10) is arranged on the lower end surface of the main shell (2) through a lower wiring insert (15), an upper through groove (12) matched with the peripheral side of the high-potential circuit board (13) is arranged in the middle of the upper shell (8), a lower through groove (16) matched with the peripheral side of the low-potential circuit board (10) is arranged in the middle of the lower shell (9), and, the periphery of the lower shell (9) is fixedly provided with lower connecting blocks (1) in one-to-one correspondence with the upper connecting blocks (7), and each upper connecting block (7) is connected with a connecting piece between the corresponding lower connecting block (1).

2. The high-voltage isolated power supply device according to claim 1, wherein the connecting piece comprises a long bolt (3) penetrating through the corresponding upper connecting block (7) and the corresponding lower connecting block (1) simultaneously, and a fastening nut (6) which is sleeved at the head end of the long bolt (3) in a thread adaptive manner, a gasket (5) sleeved on the long bolt (3) is arranged on one side of the fastening nut (6) facing the tail end of the long bolt (3), and through holes (20) for the long bolt (3) to pass through are formed in the upper connecting block (7) and the lower connecting block (1).

3. The high-voltage isolated power supply device according to claim 1, wherein a main containing cavity (21) is arranged in the main casing (2), an upper containing cavity (81) and a lower containing cavity (91) are respectively and correspondingly arranged in the upper casing (8) and the lower casing (9), an upper through opening (34) and a lower through opening (33) which are communicated with the main containing cavity (21) are respectively and correspondingly arranged on the upper end surface and the lower end surface of the main casing (2), an upper through opening (36) which is just opposite to the upper through opening (34) is arranged on the lower end of the upper casing (8), and a lower through opening (31) which is just opposite to the lower through opening (33) is arranged on the upper end of the lower casing (9).

4. A high voltage isolated power supply unit according to claim 3, wherein the upper end of the main housing (2) is fixed with an upper extension ring body (35) connected to the upper port of the first upper port (34), and the upper extension ring body (35) can pass through the second upper port (36); the lower extreme of main casing body (2) is fixed with and links up in lower opening one (33) lower extension ring body (32) of port, just lower extension ring body (32) can pass lower opening two (31).

5. The high-voltage isolated power supply device according to claim 1, wherein an upper pressure groove (19) for just engaging with the high-potential circuit board (13) is formed on the inner side of the upper casing (8) corresponding to the lower portion of the upper through groove (12), and an upper pressure block (30) extending inwards and pressing on the peripheral edge of the high-potential circuit board (13) is formed on the inner side of the upper casing (8) corresponding to the upper portion of the upper through groove (12); lower casing (9) inboard corresponds the upper portion shaping of logical groove (16) down and has just with low potential circuit board (10) block down indent (18), and lower casing (9) inboard corresponds the lower part shaping of logical groove (16) down and to inboard extension and press lower briquetting (17) at low potential circuit board (10) week side edge.

6. The high-voltage isolated power supply device according to claim 1, wherein the upper and lower end surfaces of the main housing (2) are respectively provided with an inner concave upper mounting chamber (23) and an inner concave lower mounting chamber (22), the depth of the upper mounting chamber (23) is smaller than the thickness of the high-potential circuit board (13), and the depth of the lower mounting chamber (22) is smaller than the thickness of the low-potential circuit board (10).

7. A high voltage isolated power supply unit according to claim 1, wherein said upper connecting block (7) is formed integrally with the upper casing (8), and said lower connecting block (1) is formed integrally with the lower casing (9).

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