CN215774032U

CN215774032U - Dust-blocking heat dissipation device for harmonic filter device of high-voltage frequency converter

Info

Publication number: CN215774032U
Application number: CN202121912286.2U
Authority: CN
Inventors: 宋坤洁; 刘祥宇; 宋苗; 张露丹; 国家; 王洋
Original assignee: Haijian Inspection Co ltd
Current assignee: Haijian Inspection Co ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2022-02-08
Anticipated expiration: 2031-08-16

Abstract

The utility model discloses a dust-blocking heat dissipation device for a harmonic filter device of a high-voltage frequency converter, which is characterized in that a dust-blocking air inlet component is arranged, which comprises a filter screen, a plugging component and a plurality of air inlet holes arranged on the rear wall of a box body, wherein the filter screen is arranged outside the box body by means of a supporting component, the filter screen covers a plurality of air inlet holes, the plugging components are arranged on the rear wall in the box body, the number and the positions of the plugging components correspond to the air inlet holes, the driver can drive the rack plate to slide up and down, the dust in the air entering the box body can be filtered by arranging the filter screen, the heat dissipation of the high-voltage frequency converter and the filter device is ensured when in use, through setting up plugging device can be when not using high-voltage inverter and filter, when the air circulation nature is not strong, avoid in the dust entering box of box outside air, realize when using and can both realize dirt-proof effect after using.

Description

Dust-blocking heat dissipation device for harmonic filter device of high-voltage frequency converter

Technical Field

The utility model belongs to the field of harmonic wave filtering devices of high-voltage frequency converters, and particularly relates to a dust-blocking heat dissipation device for a harmonic wave filtering device of a high-voltage frequency converter.

Background

The harmonic filter utilizes the principle of electromagnetic induction and a reactor, selects a high-performance filter capacitor to be connected with a high-linearity filter device in series, and is combined into a filter compensation system, so that the reactive power is compensated while the main harmonic component in the system is absorbed. The harmonic wave of the frequency converter is that the high-power diode rectifier (or transistor/inversion module) for an input power supply needs to be inverted in the operation process of the frequency converter; in the inversion process, higher harmonics are generated in the input and output loops. The harmonic filter has high requirements on working environment, and a dust-free environment needs to be designed in the cabinet body.

The harmonic filter cabinet is usually provided with electric elements, the electric elements are required for the installation environment, when the dust in the air in the cabinet is too much, the contact effect and the long-term service life of the electric elements can be influenced, and the service life of the electric elements can be influenced and the aging of the electric elements can be caused under the condition of high temperature.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: there is provided a dust-blocking heat-dissipating device capable of solving the above-mentioned problems.

The technical scheme adopted by the utility model is as follows:

a dust-blocking heat-radiating device for a harmonic filter device of a high-voltage frequency converter comprises a box body, the high-voltage frequency converter and the filter device which are arranged in the box body, and further comprises a dust-blocking air inlet component, a heat-radiating air exhaust component and a driver, wherein the dust-blocking air inlet component comprises a filter screen, a plugging component and a plurality of air inlet holes formed in the rear wall of the box body, the filter screen is arranged outside the box body by virtue of a supporting component, the filter screen covers the plurality of air inlet holes, the plugging component is arranged on the rear wall in the box body, the number and the position of the plugging component correspond to the air inlet holes, the dust-blocking heat-radiating device comprises a support, a rotating shaft, a baffle plate, a rack plate and a gear, the support is connected with the box body, the rotating shaft is horizontally arranged on the support and is rotatably connected with the support, the baffle plate is connected with the rotating shaft, the lower end of the baffle plate is positioned in the air inlet holes, the shape and the size of the lower end of the baffle plate are matched with the air inlet holes, and the rack plate is slidably connected with the box body by virtue of a sliding component, the gear is coaxially fixed on the rotating shaft, the gear is in meshed transmission with the rack plate, and the driver can drive the rack plate to slide up and down; the heat dissipation exhaust component comprises a heat dissipation fan and a one-way exhaust valve, the exhaust pipe is arranged at the top of the box body, the heat dissipation fan is arranged at the lower end of the exhaust pipe and connected with the box body, an exhaust nozzle is arranged at the upper end of the exhaust pipe, the one-way exhaust valve is connected with the exhaust nozzle, the free end of the one-way exhaust valve is of a flat structure, and the upper inner wall and the lower inner wall of the flat structure are in contact.

The further technical scheme is that the driver comprises a motor, a worm wheel and a worm, the motor is fixed on the box body, the worm is coaxially fixed on an output shaft of the motor, the worm wheel is coaxially fixed on a rotating shaft on the uppermost layer, and the worm is in transmission connection with the worm wheel.

The technical scheme is that a plurality of air exhaust nozzles are arranged at the upper end of the air exhaust pipe, and each air exhaust nozzle is connected with a one-way air exhaust valve.

A further technical scheme lies in, the slip subassembly includes slide bar and slide, the slide is located rack plate below and is connected with the box, has seted up the slide opening on the slide, and the upper end of slide bar is connected with the lower extreme of rack plate, and the slide bar passes slide opening and slide sliding connection.

A further technical scheme lies in, the supporting component includes that the symmetry sets up two mounting grooves at filter screen horizontal direction both ends, and two mounting grooves all are connected with the box, and the notch has been seted up towards one side of filter screen to the mounting groove, and filter screen horizontal direction both ends are located the notch that corresponds the position respectively inside, are provided with the subassembly that compresses tightly that is used for compressing tightly the filter screen on the mounting groove.

The technical scheme is that the compressing assembly comprises a compression rod and a tension spring, a mounting hole facing the notch is formed in the mounting groove, the compression rod is connected to the inside of the mounting hole in a sliding mode, a rod cap is arranged at the upper end of the compression rod, one end of the tension spring is connected with the rod cap in a sleeved mode, and the other end of the tension spring is connected with the mounting groove.

A further technical scheme lies in, be provided with on the filter screen and scrape dirt subassembly, it includes scraper blade, spacing slide bar, driving screw and swivel nut, spacing slide bar includes two, and spacing slide bar all is fixed with the box, and two slide openings have been seted up to the scraper blade, and two spacing slide bars wear to establish respectively in two slide openings, and the driving screw both ends are all rotated with the box with the help of the bearing frame and are connected, and the coaxial first bevel gear that is fixed with of driving screw tip, and its tip coaxial second bevel gear that is fixed with of worm through the box, first bevel gear and second bevel gear meshing transmission, the swivel nut cover is established rather than threaded connection on driving screw, and the swivel nut is fixed with the scraper blade.

In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:

1. by arranging the dust blocking air inlet component which comprises a filter screen, a plugging component and a plurality of air inlet holes formed in the rear wall of the box body, wherein the filter screen is arranged outside the box body by virtue of a supporting component and covers the air inlet holes, the plugging component is arranged on the rear wall inside the box body, the number and the position of the plugging component correspond to the air inlet holes, the dust blocking air inlet component comprises a support, a rotating shaft, a baffle, a rack plate and a gear, the support is connected with the box body, the lower end of the baffle is positioned inside the air inlet holes, the rack plate is in sliding connection with the box body by virtue of a sliding component, the gear is coaxially fixed on the rotating shaft, the gear is in meshing transmission with the rack plate, a driver can drive the rack plate to slide up and down, dust in air entering the box body can be filtered by arranging the filter screen, the heat dissipation of the high-voltage frequency converter and the filtering device is ensured, when the high-voltage frequency converter and the filtering device are not used, when the air circulation is not strong, the dust in the air outside the box body is prevented from entering the box body, and the dustproof effect can be realized during and after use;

2. set up the heat dissipation component of airing exhaust, it includes heat dissipation fan and one-way exhaust valve, the box top is provided with the exhaust pipe, the heat dissipation fan sets up at the exhaust pipe lower extreme and is connected with the box, the exhaust pipe upper end is provided with the exhaust nozzle, one-way exhaust valve is connected with the exhaust nozzle, the free end of one-way exhaust valve is flat structure, the upper and lower inner wall of flat structure position contacts, can carry the heat that the box produced by high-voltage inverter and filter equipment to the exhaust pipe after starting the heat dissipation fan, make in the exhaust pipe produce pressure differential with the external world, can make the air current pass through one-way exhaust valve discharge box, avoid outside dust along with the air inside the exhaust pipe gets into the box, can realize the heat dissipation simultaneously again.

Drawings

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

FIG. 2 is a schematic view of the structure of the filter net of the present invention;

FIG. 3 is a schematic structural view of the dust scraping assembly of the present invention;

FIG. 4 is a schematic view of the structure of the one-way exhaust valve of the present invention;

fig. 5 is a schematic cross-sectional view of a hold-down assembly according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.

As shown in fig. 1-5, a dust-blocking heat dissipation device for a harmonic filter device of a high-voltage inverter comprises a box body 1, the high-voltage inverter and the filter device inside the box body 1, and further comprises a dust-blocking air inlet member, a heat dissipation air exhaust member and a driver, wherein the dust-blocking air inlet member comprises a filter screen 2, a plugging component and a plurality of air inlet holes 3 arranged on the rear wall of the box body 1, the filter screen 2 is arranged outside the box body 1 by means of a support component, the filter screen 2 covers a plurality of air inlet holes 3, the plugging component is arranged on the rear wall inside the box body 1, the number and the position of the plugging component correspond to the air inlet holes 3, the plugging component comprises a support 4, a rotating shaft 5, a baffle 6, a rack plate 7 and a gear 8, the support 4 is connected with the box body 1, the rotating shaft 5 is horizontally arranged and is rotatably connected with the support 4, the baffle 6 is connected with the rotating shaft 5, and the lower end of the baffle 6 is positioned inside the air inlet holes 3, the shape and size of the lower end of the baffle 6 are matched with those of the air inlet hole 3, the rack plate 7 is in sliding connection with the box body 1 through a sliding assembly, the gear 8 is coaxially fixed on the rotating shaft 5, the gear 8 and the rack plate 7 are in meshing transmission, and the driver can drive the rack plate 7 to slide up and down; the heat dissipation exhaust component comprises a heat dissipation fan 9 and a one-way exhaust valve 10, an exhaust pipe 11 is arranged at the top of the box body 1, the heat dissipation fan 9 is arranged at the lower end of the exhaust pipe 11 and connected with the box body 1, an exhaust nozzle 12 is arranged at the upper end of the exhaust pipe 11, the one-way exhaust valve 10 is connected with the exhaust nozzle 12, the free end of the one-way exhaust valve 10 is of a flat structure, and the upper inner wall and the lower inner wall of the flat structure are in contact.

When in use, because the box body 1 is hot when the high-voltage frequency converter and the filter device work, the internal pressure of the box body 1 is larger through the thermal expansion principle, so that the air can be exchanged with the air flow outside the box body 1 through the filter screen 2 and the air inlet hole 3, the dust prevention is realized through the filter screen 2, the internal and external pressures of the box body 1 are balanced when the high-voltage frequency converter and the filter device stop working, the dust which flows slowly is not easy to be caught by the filter screen 2, the dust is easy to gather inside the box body 1, the dust prevention of the air inlet hole 3 and the air exhaust position is realized through arranging the dust-blocking air inlet component and the heat dissipation air exhaust component, the one-way air exhaust valve 10 is supported by rubber, plastic and other elastic materials, the structure is similar to an automatic sealing valve on an aluminum film balloon, the internal port is tightly attached together due to the internal air pressure, the internal port can be opened by external inflation, the free end of the one-way exhaust valve 10 is of a flat structure, the upper and lower inner walls of the flat structure are contacted, when the internal pressure of the exhaust pipe 11 is large, the upper and lower inner walls of the free end of the one-way exhaust valve 10 are separated, and the air flow is exhausted.

By arranging the dust blocking air inlet component which comprises a filter screen 2, a plugging component and a plurality of air inlet holes 3 arranged on the rear wall of the box body 1, wherein the filter screen 2 is arranged outside the box body 1 by virtue of a supporting component, the filter screen 2 covers the plurality of air inlet holes 3, the plugging component is arranged on the rear wall inside the box body 1, the number and the position of the plugging component correspond to the number and the position of the air inlet holes 3, the plugging component comprises a support 4, a rotating shaft 5, a baffle 6, a rack plate 7 and a gear 8, the support 4 is connected with the box body 1, the lower end of the baffle 6 is positioned inside the air inlet holes 3, the rack plate 7 is in sliding connection with the box body 1 by virtue of a sliding component, the gear 8 is coaxially fixed on the rotating shaft 5, the gear 8 is in meshing transmission with the rack plate 7, a driver can drive the rack plate 7 to slide up and down, dust in air entering the box body 1 can be filtered by arranging the filter screen 2, and the heat dissipation of the high-voltage frequency converter and the internal filtering device is ensured when in use, by arranging the plugging device, when the high-voltage frequency converter and the filtering device are not used and the air circulation is not strong, dust in the air outside the box body 1 is prevented from entering the box body 1, and the dustproof effect can be realized during use and after use; set up the heat dissipation component of airing exhaust, it includes heat dissipation fan 9 and one-

way exhaust valve

10, 1 top of box is provided with exhaust pipe 11, heat dissipation fan 9 sets up at exhaust pipe 11 lower extreme and is connected with box 1, exhaust pipe 11 upper end is provided with exhaust nozzle 12, one-way exhaust valve 10 is connected with exhaust nozzle 12, the free end of one-way exhaust valve 10 is the flat structure, the upper and lower inner wall of flat structure position contacts, can carry to exhaust pipe 11 by the heat that high-voltage inverter and filter produced 1 inside the box after starting heat dissipation fan 9, make in the exhaust pipe 11 produce pressure differential with the external world, can make the air current pass through one-way exhaust valve 10 exhaust box 1, avoid outside dust along with the air inside exhaust pipe 11 gets into box 1 along, can realize the heat dissipation simultaneously again.

The driver includes motor 13, worm wheel 14 and worm 15, motor 13 fixes on box 1, and worm 15 is coaxial to be fixed on motor 13's output shaft, and worm wheel 14 is coaxial to be fixed on the rotation axis 5 of the superiors, and worm 15 is connected with worm wheel 14 transmission, realizes that drive rack plate 7 slides from top to bottom.

A plurality of air exhaust nozzles 12 are arranged at the upper end of the air exhaust pipe 11, and each air exhaust nozzle 12 is connected with a one-way exhaust valve 10, so that the heat dissipation and air exhaust effects are guaranteed.

The sliding assembly comprises a sliding rod 16 and a sliding seat 17, the sliding seat 17 is located below the rack plate 7 and connected with the box body 1, a sliding hole is formed in the sliding seat 17, the upper end of the sliding rod 16 is connected with the lower end of the rack plate 7, and the sliding rod 16 penetrates through the sliding hole and is in sliding connection with the sliding seat 17 to achieve sliding connection.

The supporting component comprises two mounting grooves 18 symmetrically arranged at two ends of the filter screen 2 in the horizontal direction, the two mounting grooves 18 are all connected with the box body 1, the mounting grooves 18 are provided with notches towards one side of the filter screen 2, two ends of the filter screen 2 in the horizontal direction are respectively positioned inside the notches of the corresponding positions, a pressing component used for pressing the filter screen 2 is arranged on the mounting grooves 18, and the filter screen 2 is fixed.

Compress tightly the subassembly and include depression bar 19 and extension spring 20, set up the mounting hole towards the notch on the mounting groove 18, depression bar 19 sliding connection is inside the mounting hole, depression bar 19 upper end is provided with pole cap 21, extension spring 20 cover is established its one end and is connected with pole cap 21 on depression bar 19, its other end and mounting groove 18 are connected, realize filter screen 2's fixed through compressing tightly the mode, can set up connecting plate 28 on mounting groove 18, depression bar 19 passes connecting plate 28, and extension spring 20 lower extreme is connected with the connecting plate, and not directly be connected with mounting groove 18, can increase depression bar 19's length, and then increase extension spring 20's length, improve and compress tightly the effect.

Be provided with on the filter screen 2 and scrape dirt subassembly, it includes scraper blade 22, limit slide bar 23, driving screw 24 and swivel nut 25, limit slide bar 23 includes two, limit slide bar 23 all is fixed with box 1, two slide openings have been seted up to scraper blade 22, two limit slide bar 23 wear to establish respectively in two slide openings, driving screw 24 both ends are all rotated with box 1 with the help of the bearing frame and are connected, driving screw 24 tip coaxial is fixed with first bevel gear 26, worm 15 runs through its tip coaxial of box 1 and is fixed with second bevel gear 27, first bevel gear 26 and second bevel gear 27 meshing transmission, swivel nut 25 cover is established on driving screw 24 rather than threaded connection, swivel nut 25 is fixed with scraper blade 22, can scrape the dust of gathering on the filter screen 2.

The above are merely preferred embodiments of the present invention.

Claims

1. A dust-blocking heat dissipation device for a harmonic filter device of a high-voltage frequency converter comprises a box body (1), the high-voltage frequency converter and the filter device which are arranged in the box body (1), and is characterized by further comprising a dust-blocking air inlet component, a heat dissipation exhaust component and a driver, wherein the dust-blocking air inlet component comprises a filter screen (2), a blocking component and a plurality of air inlet holes (3) which are formed in the rear wall of the box body (1), the filter screen (2) is arranged outside the box body (1) by means of a supporting component, the filter screen (2) covers the plurality of air inlet holes (3), the blocking component is arranged on the rear wall in the box body (1), the number and the positions of the blocking components correspond to the air inlet holes (3), the blocking component comprises a support (4), a rotating shaft (5), a baffle (6), a rack plate (7) and a gear (8), the support (4) is connected with the box body (1), the rotating shaft (5) is horizontally arranged on the support (4) in a penetrating manner and is rotatably connected with the support, the baffle (6) is connected with the rotating shaft (5), the lower end of the baffle (6) is positioned in the air inlet hole (3), the shape and the size of the lower end of the baffle (6) are matched with those of the air inlet hole (3), the rack plate (7) is in sliding connection with the box body (1) through a sliding assembly, the gear (8) is coaxially fixed on the rotating shaft (5), the gear (8) is in meshing transmission with the rack plate (7), and the driver can drive the rack plate (7) to slide up and down; the heat dissipation exhaust component comprises a heat dissipation fan (9) and a one-way exhaust valve (10), an exhaust pipe (11) is arranged at the top of the box body (1), the heat dissipation fan (9) is arranged at the lower end of the exhaust pipe (11) and connected with the box body (1), an exhaust nozzle (12) is arranged at the upper end of the exhaust pipe (11), the one-way exhaust valve (10) is connected with the exhaust nozzle (12), the free end of the one-way exhaust valve (10) is of a flat structure, and the upper inner wall and the lower inner wall of the flat structure are in contact.

2. The dust blocking and heat dissipating device for the harmonic filter device of the high-voltage frequency converter is characterized in that the driver comprises a motor (13), a worm wheel (14) and a worm (15), the motor (13) is fixed on the box body (1), the worm (15) is coaxially fixed on an output shaft of the motor (13), the worm wheel (14) is coaxially fixed on the rotating shaft (5) at the uppermost layer, and the worm (15) is in transmission connection with the worm wheel (14).

3. The dust-blocking and heat-dissipating device for the harmonic filter device of the high-voltage frequency converter is characterized in that a plurality of exhaust nozzles (12) are arranged at the upper end of the exhaust pipe (11), and each exhaust nozzle (12) is connected with a one-way exhaust valve (10).

4. The dust-blocking and heat-dissipating device for the harmonic filter device of the high-voltage frequency converter is characterized in that the sliding component comprises a sliding rod (16) and a sliding seat (17), the sliding seat (17) is located below the rack plate (7) and connected with the box body (1), a sliding hole is formed in the sliding seat (17), the upper end of the sliding rod (16) is connected with the lower end of the rack plate (7), and the sliding rod (16) penetrates through the sliding hole and is in sliding connection with the sliding seat (17).

5. The dust blocking and heat dissipating device for the harmonic filter device of the high-voltage frequency converter according to claim 1, wherein the supporting component comprises two mounting grooves (18) symmetrically arranged at two ends of the filter screen (2) in the horizontal direction, both the two mounting grooves (18) are connected with the box body (1), a notch is formed in one side of each mounting groove (18) facing the filter screen (2), two ends of the filter screen (2) in the horizontal direction are respectively located inside the notches in the corresponding positions, and a compressing component for compressing the filter screen (2) is arranged on each mounting groove (18).

6. The dust blocking and heat dissipating device for the harmonic filter device of the high-voltage inverter according to claim 5, wherein the compressing assembly comprises a compression bar (19) and a tension spring (20), a mounting hole facing the notch is formed in the mounting groove (18), the compression bar (19) is slidably connected inside the mounting hole, a bar cap (21) is arranged at the upper end of the compression bar (19), the tension spring (20) is sleeved on the compression bar (19) and is connected with the bar cap (21) at one end thereof, and the other end of the tension spring is connected with the mounting groove (18).

7. The dust blocking and heat dissipating device for the harmonic filter device of the high-voltage frequency converter is characterized in that a dust scraping component is arranged on the filter screen (2) and comprises a scraper (22), two limiting slide rods (23), a driving screw (24) and a threaded sleeve (25), the two limiting slide rods (23) are arranged, the limiting slide rods (23) are fixed with the box body (1), the scraper (22) is provided with two slide holes, the two limiting slide rods (23) are respectively arranged in the two slide holes in a penetrating manner, two ends of the driving screw (24) are rotatably connected with the box body (1) through bearing seats, a first bevel gear (26) is coaxially fixed at the end of the driving screw (24), the worm (15) penetrates through the box body (1) and is coaxially fixed with a second bevel gear (27), the first bevel gear (26) is in meshing transmission with the second bevel gear (27), the threaded sleeve (25) is sleeved on the driving screw (24) and is in threaded connection with the driving screw, the screw sleeve (25) is fixed with the scraper (22).