CN212137528U - Dustproof housing structure of frequency converter - Google Patents
Dustproof housing structure of frequency converter Download PDFInfo
- Publication number
- CN212137528U CN212137528U CN202020846243.8U CN202020846243U CN212137528U CN 212137528 U CN212137528 U CN 212137528U CN 202020846243 U CN202020846243 U CN 202020846243U CN 212137528 U CN212137528 U CN 212137528U
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- air inlet
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- 238000007789 sealing Methods 0.000 claims abstract description 18
- 239000000428 dust Substances 0.000 claims abstract description 17
- 238000009434 installation Methods 0.000 claims abstract description 13
- 238000005192 partition Methods 0.000 claims abstract description 11
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 230000035939 shock Effects 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 238000007664 blowing Methods 0.000 abstract 1
- 239000012535 impurity Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Abstract
A dustproof shell structure of a frequency converter comprises a shell, a filter box, a pressing plate and a fitting plate; the shell is divided into an upper-layer mounting bin and a lower-layer air inlet bin by a partition plate; an air draft device blowing air to the installation bin is arranged in the air inlet bin; the shell of the air inlet bin is provided with a plurality of first air inlets and an open slot, and the inner wall of the air inlet bin is provided with a shaped plate; the attaching plate is connected with the filter box; the side end surface of the filter box is provided with a sliding plate along the circumferential direction; both ends of the sliding plate are connected with the attaching plates; the bottom surface of the filter box is provided with a second air inlet and a filter layer for filtering and dehumidifying air; the pressing plate is positioned in the filter box and compresses the filter layer; when the attaching plate and the open slot are assembled, the sliding plate slides into the first sliding groove in a matched manner, and the end face, facing the first sliding groove, of the sliding plate presses the inner wall of the first sliding groove tightly; the installation bin is provided with a plurality of groups of exhaust ports and sealing doors on the shell. The utility model discloses convenient to use can effectually prevent dust to the converter, and has good radiating effect to the converter.
Description
Technical Field
The utility model relates to a dustproof technical field of converter especially relates to a dust cover structure of converter.
Background
The frequency converter is an electric control device which applies a frequency conversion technology and a microelectronic technology and controls an alternating current motor by changing the frequency mode of a working power supply of the motor. The frequency converter mainly comprises a rectifying unit (alternating current to direct current), a filtering unit, an inverting unit (direct current to alternating current), a braking unit, a driving unit, a detection unit micro-processing unit and the like. The frequency converter adjusts the voltage and frequency of an output power supply by switching on and off an internal IGBT, and provides the required power supply voltage according to the actual requirement of the motor, so that the aims of energy conservation and speed regulation are fulfilled; with the continuous improvement of the industrial automation degree, the frequency converter is widely applied; when the frequency converter is used, dust in the air can enter the frequency converter, and the dust is accumulated on an electrified circuit of the frequency converter, so that the frequency converter is easily damaged due to short circuit of the circuit; therefore, the application provides a dustproof shell structure of the frequency converter.
SUMMERY OF THE UTILITY MODEL
Objects of the invention
For solving the technical problem who exists among the background art, the utility model provides a dust cover structure of converter, the utility model discloses convenient to use shock resistance is good, can effectually prevent dust to the converter, and has good radiating effect to the converter.
(II) technical scheme
In order to solve the problems, the utility model provides a dustproof shell structure of a frequency converter, which comprises a shell, an exhaust pipe, a filter box, a pressing plate and an attaching plate;
the bottom surface of the shell is provided with a plurality of groups of shock absorption supporting legs, and a partition plate is arranged in the shell; the partition board is used for dividing the interior of the shell into an upper-layer mounting bin and a lower-layer air inlet bin, and a plurality of groups of first through holes are formed in the partition board;
an air draft device is arranged in the air inlet bin; the air outlet end of the air draft device is respectively connected with a plurality of groups of first through holes through a plurality of groups of pipelines; the shell of the air inlet bin is provided with a plurality of first air inlets and an open slot, and the inner wall of the air inlet bin is provided with a shaped plate; the inner end surface of the shaped plate is provided with a first sliding chute along the circumferential direction; the first sliding groove is communicated with the open groove; a plurality of groups of limiting blind holes are uniformly arranged on the bottom surface of the open slot; magnets are arranged in each group of limiting blind holes;
the attachment plate is connected with the filter box, and a plurality of groups of limiting columns are arranged on the end face of the attachment plate; the plurality of groups of limiting columns are respectively inserted into the plurality of groups of limiting blind holes in a matching way and are respectively connected with the plurality of groups of magnets in a magnetic adsorption way; the end face of the attachment plate facing the bottom face of the open slot compresses the bottom face of the open slot;
the side end surface of the filter box is provided with a sliding plate along the circumferential direction; both ends of the sliding plate are connected with the attaching plates; the bottom surface of the filter box is provided with a second air inlet, and the bottom surface of the filter box is provided with a filter layer for filtering and dehumidifying air; the pressing plate is positioned in the filter box and compresses the filter layer; when the attaching plate and the open slot are assembled, the sliding plate slides into the first sliding groove in a matched manner, and the end face, facing the first sliding groove, of the sliding plate presses the inner wall of the first sliding groove tightly;
the mounting bin is provided with a plurality of groups of exhaust ports and first openings on the shell; the shell is provided with a sealing door for sealing the first opening and a plurality of groups of dust screens for sealing the plurality of groups of exhaust ports;
the multiple groups of exhaust pipes are distributed side by side, the air inlet pipe orifices of the multiple groups of exhaust pipes are respectively connected with the multiple groups of first through holes, and the side end faces of the multiple groups of exhaust pipes are provided with ventilation holes.
Preferably, the projection of the pressure plate is in a shape of a Chinese character 'hui'; the second air inlet hole is a square hole.
Preferably, the filter layer comprises a first filter screen layer, a second filter screen layer, a sponge layer and a third filter screen layer which are sequentially stacked along the gas flow direction; wherein, the mesh diameters of the first filter screen layer, the second filter screen layer and the third filter screen layer are gradually reduced.
Preferably, an elastic sealing gasket is arranged on the outer peripheral surface of the sliding plate, which is tightly pressed against the inner wall of the first sliding chute.
Preferably, the end face, far away from the filter box, of the attaching plate is provided with a handle.
Preferably, each group of shock absorption supporting legs comprises an installation cylinder, an insulation base, a supporting rod, a sliding part and a spring;
one end of the mounting cylinder is connected with the shell, the other end of the mounting cylinder is provided with a second through hole, and the inner wall of the mounting cylinder is provided with a plurality of groups of second sliding grooves along the central axis direction thereof;
the sliding piece is arranged on the supporting rod and is connected with the second sliding chute in a sliding fit manner; the central axis of the supporting rod is superposed with the central axis of the mounting cylinder, and one end of the supporting rod, which is far away from the mounting cylinder, is connected with the insulating base;
the spring is arranged in the mounting cylinder, the spring sleeve is arranged on the outer side of the supporting rod, and two ends of the spring are respectively connected with the inner wall of the mounting cylinder and the sliding part.
Preferably, the projection of the sliding part is annular, and the sliding part is in threaded fit connection with the supporting rod.
Preferably, each first air inlet is internally provided with a dustproof filter screen.
The above technical scheme of the utility model has following profitable technological effect:
in the utility model, when in use, the frequency converter is installed in the installation bin, the air draft device sucks external air into the air inlet bin from the multiple groups of first air inlet holes, the air sequentially passes through the second air inlet holes and the filter layer and enters the air inlet end of the air draft device, the filter layer absorbs and filters dust impurities, moisture and the like carried in the air, finally, clean and dry air enters the multiple groups of exhaust pipes, the air is discharged into the installation bin from the air vents on the multiple groups of exhaust pipes so as to blow and dissipate heat of the frequency converter, hot air is discharged from the multiple groups of exhaust ports, and the dust screen at the exhaust ports can effectively prevent external impurities from entering the installation bin; when the filtering layer needs to be cleaned better, the attaching plate is pulled to pull the filtering box out of the air inlet bin, so that the filtering layer in the filtering box can be cleaned, the operation is simple, the use is convenient, the phenomenon that dust-mixed and moist air is fed into the mounting bin when the frequency converter is subjected to heat dissipation can be effectively avoided, and the influence of the dust-mixed and moist air on the service performance of the frequency converter is avoided; in addition, the vibration generated by the operation of the frequency converter and the air draft device in the shell is buffered through the arranged damping supporting legs, and the stability of the shell is improved.
Drawings
Fig. 1 is a schematic perspective view of a housing in a dust-proof case structure of a frequency converter according to the present invention.
Fig. 2 is a schematic diagram of a locally enlarged structure at a position a in a dust-proof housing structure of a frequency converter.
Fig. 3 is a schematic structural diagram of a dust-proof housing structure of a frequency converter according to the present invention.
Fig. 4 is a schematic structural diagram of a local amplification at a position B in a dustproof housing structure of a frequency converter.
Fig. 5 is a front view of a dust-proof case structure of the frequency converter provided by the present invention.
Fig. 6 is a schematic perspective view of a filter box in a dust-proof housing structure of a frequency converter.
Fig. 7 is a schematic perspective view of a pressing plate in a dust-proof case structure of a frequency converter according to the present invention.
Reference numerals: 1. a housing; 2. a first opening; 3. a first through hole; 4. a partition plate; 5. an exhaust port; 6. A first air intake hole; 7. an open slot; 8. a shaped plate; 9. a first chute; 10. a limiting blind hole; 11. an exhaust pipe; 12. a dust screen; 13. an air draft device; 14. a dustproof filter screen; 15. mounting the cylinder; 16. an insulating base; 17. a support bar; 18. a slider; 19. a spring; 20. a filter box; 21. a slide plate; 22. an elastic sealing gasket; 23. pressing a plate; 24. a third screen layer; 25. a sponge layer; 26. a second screen layer; 27. a first screen layer; 28. attaching a plate; 29. a sealing door; 30. a limiting column; 31. a second air intake hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1-7, the utility model provides a dustproof shell structure of a frequency converter, which comprises a shell 1, an exhaust pipe 11, a filter box 20, a pressure plate 23 and a fitting plate 28;
the bottom surface of the shell 1 is provided with a plurality of groups of shock absorption supporting legs, and a partition plate 4 is arranged in the shell 1; the partition plate 4 is used for dividing the interior of the shell 1 into an upper-layer mounting bin for mounting the frequency converter body and a lower-layer air inlet bin, and the partition plate 4 is provided with a plurality of groups of first through holes 3 for communicating the air inlet bin with the mounting bin;
an air draft device 13 is arranged in the air inlet bin; the air outlet end of the air draft device 13 is respectively connected with a plurality of groups of first through holes 3 through a plurality of groups of pipelines;
the air inlet bin is provided with a plurality of first air inlets 6 and an open slot 7 on the shell 1, and the inner wall of the air inlet bin is provided with a shaped plate 8; a first sliding groove 9 is formed in the inner end face of the shaped plate 8 along the circumferential direction of the shaped plate; the first sliding chute 9 is communicated with the open slot 7; a plurality of groups of limiting blind holes 10 are uniformly arranged on the bottom surface of the open slot 7; magnets are arranged in each group of limiting blind holes 10;
it should be noted that the open slot 7 is a step slot; the stepped groove is communicated with the interior of the air inlet bin, and the first sliding groove 9 is provided with an opening communicated with the stepped groove on the end surface of the shaped plate 8 so that the sliding plate 21 can slide into the first sliding groove 9;
the attaching plate 28 is connected with the filter box 20, and a plurality of groups of limiting columns 30 are arranged on the end face of the attaching plate 28; the limiting columns 30 and the filter box 20 are arranged on the same side, the limiting columns 30 correspond to the limiting blind holes 10 one by one, and a plurality of groups of limiting columns 30 are respectively inserted into a plurality of groups of limiting blind holes 10 in a matching manner and are respectively connected with a plurality of groups of magnets in a magnetic adsorption manner; the end surface of the attaching plate 28 facing the bottom surface of the open slot 7 presses the bottom surface of the open slot 7;
the side end surface of the filter box 20 is provided with a sliding plate 21 along the circumferential direction; two ends of the sliding plate 21 are connected with the attaching plates 28; the bottom surface of the filter box 20 is provided with a second air inlet 31, and the bottom surface of the filter box 20 is provided with a filter layer for filtering and dehumidifying air; the pressing plate 23 is positioned in the filter box 20 and presses the filter layer tightly; the pressing plate 23 is fixed with the bottom surface of the filter box 20 through the arranged bolts so as to press the filter layer on the bottom surface of the filter box 20;
when the attachment plate 28 and the open slot 7 are assembled, the sliding plate 21 is matched and slides into the first sliding chute 9, and the end surface of the sliding plate 21 facing the first sliding chute 9 presses the inner wall of the first sliding chute 9;
the installation bin is provided with a plurality of groups of exhaust ports 5 and first openings 2 on the shell 1; wherein, the shell 1 is provided with a sealing door 29 for sealing the first opening 2 and a plurality of groups of dust screens 12 for sealing a plurality of groups of exhaust ports 5; the dust screen 12 is fixed with the shell 1 through bolts so as to be convenient for dismounting the dust screen 12, and the dust screen 12 corresponds to the exhaust ports 5 one by one;
the sealing door 29 is rotatably connected with the casing 1 through a hinge, and a handle and a transparent window are arranged on the sealing door 29, which are generally the prior art and are not described in detail;
the multiple groups of exhaust pipes 11 are distributed side by side, the air inlet pipe orifices of the multiple groups of exhaust pipes 11 are respectively connected with the multiple groups of first through holes 3, and the side end faces of the multiple groups of exhaust pipes 11 are provided with ventilation holes.
In the utility model, when in use, the frequency converter is installed in the installation bin, the air draft device 13 is operated to suck external air into the air inlet bin from the multiple groups of first air inlet holes 6, the air sequentially passes through the second air inlet holes 31 and the filter layer and enters the air inlet end of the air draft device 13, the filter layer absorbs and filters dust impurities, moisture and the like carried in the air, finally, clean and dry air enters the multiple groups of exhaust pipes 11, the air is discharged into the installation bin from the air vents on the multiple groups of exhaust pipes 11 to blow and dissipate heat of the frequency converter, hot air is discharged from the multiple groups of exhaust ports 5, and the dust screen 12 at the exhaust ports 5 can effectively prevent the external impurities from entering the installation bin; when the filter layer needs to be cleaned better, the filter box 20 is pulled out from the air inlet bin by pulling the attaching plate 28, the filter layer in the filter box 20 can be cleaned, and the operation is simple and the use is convenient.
In an alternative embodiment, the projection of the platen 23 is a zigzag shape; the second air inlet holes 31 are square holes;
further, the projection of the platen 23 is annular; the second intake holes 31 are circular holes.
In an alternative embodiment, the filter layer includes a first filter screen layer 27, a second filter screen layer 26, a sponge layer 25 and a third filter screen layer 24 which are sequentially stacked in the gas flow direction; wherein, the mesh diameters of the first filter screen layer 27, the second filter screen layer 26 and the third filter screen layer 24 are gradually reduced, and the particle impurities in the air are filtered through the arranged first filter screen layer 27 and the second filter screen layer 26; the sponge layer 25 absorbs moisture in the air; the third screen layer 24 protects the sponge layer 25.
In an alternative embodiment, an elastic sealing gasket 22 is disposed on the outer circumferential surface of the sliding plate 21 pressed against the inner wall of the first sliding chute 9 to improve the sealing performance between the sliding plate 21 and the inner wall of the first sliding chute 9.
In an alternative embodiment, the end of the attachment panel 28 remote from the filter box 20 is provided with a handle, which is a concave handle.
In an alternative embodiment, each group of shock-absorbing supporting feet comprises a mounting cylinder 15, an insulating base 16, a supporting rod 17, a sliding part 18 and a spring 19;
one end of the mounting cylinder 15 is connected with the shell 1, the other end of the mounting cylinder 15 is provided with a second through hole, and the inner wall of the mounting cylinder 15 is provided with a plurality of groups of second sliding grooves along the central axis direction thereof;
the sliding part 18 is arranged on the supporting rod 17, and the sliding part 18 is connected with the second sliding chute in a sliding fit manner; the central axis of the support rod 17 is superposed with the central axis of the mounting cylinder 15, and one end of the support rod 17 far away from the mounting cylinder 15 is connected with an insulating base 16;
In an alternative embodiment, the projection of the slide 18 is annular, the slide 18 being in threaded engagement with the support bar 17.
In an alternative embodiment, a dust-proof filter screen 14 is arranged in each first air inlet hole 6.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (8)
1. A dustproof shell structure of a frequency converter is characterized by comprising a shell (1), an exhaust pipe (11), a filter box (20), a pressing plate (23) and a laminating plate (28);
a plurality of groups of shock absorption supporting legs are arranged on the bottom surface of the shell (1), and a partition plate (4) is arranged in the shell (1); the partition plate (4) is used for dividing the interior of the shell (1) into an upper-layer mounting bin and a lower-layer air inlet bin, and a plurality of groups of first through holes (3) are formed in the partition plate (4);
an air draft device (13) is arranged in the air inlet bin; the air outlet end of the air draft device (13) is respectively connected with a plurality of groups of first through holes (3) through a plurality of groups of pipelines; the air inlet bin is provided with a plurality of first air inlets (6) and an open slot (7) on the shell (1), and the inner wall of the air inlet bin is provided with a shaped plate (8); a first sliding groove (9) is formed in the inner end surface of the shaped plate (8) along the circumferential direction of the shaped plate; the first sliding chute (9) is communicated with the open slot (7); a plurality of groups of limiting blind holes (10) are uniformly arranged on the bottom surface of the open slot (7); magnets are arranged in each group of limiting blind holes (10);
the attaching plate (28) is connected with the filter box (20), and a plurality of groups of limiting columns (30) are arranged on the end face of the attaching plate (28); the plurality of groups of limiting columns (30) are respectively inserted into the plurality of groups of limiting blind holes (10) in a matching way and are respectively connected with the plurality of groups of magnets in a magnetic adsorption way; the end face of the attachment plate (28) facing the bottom face of the open slot (7) presses the bottom face of the open slot (7);
a sliding plate (21) is arranged on the side end surface of the filter box (20) along the circumferential direction; two ends of the sliding plate (21) are connected with the attaching plate (28); the bottom surface of the filter box (20) is provided with a second air inlet hole (31), and the bottom surface of the filter box (20) is provided with a filter layer for filtering and dehumidifying air; the pressing plate (23) is positioned in the filter box (20) and presses the filter layer tightly; when the attaching plate (28) and the open slot (7) are assembled, the sliding plate (21) slides into the first sliding groove (9) in a matching manner, and the sliding plate (21) presses the inner wall of the first sliding groove (9) towards the end surface of the first sliding groove (9);
the installation bin is provided with a plurality of groups of exhaust ports (5) and first openings (2) on the shell (1); wherein, the shell (1) is provided with a sealing door (29) for sealing the first opening (2) and a plurality of groups of dust screens (12) for sealing a plurality of groups of exhaust ports (5);
the multiple groups of exhaust pipes (11) are distributed side by side, the air inlet pipe orifices of the multiple groups of exhaust pipes (11) are respectively connected with the multiple groups of first through holes (3), and the side end faces of the multiple groups of exhaust pipes (11) are provided with ventilation holes.
2. The dust-proof housing structure of a frequency converter according to claim 1, wherein the projection of the pressure plate (23) is in a shape of a Chinese character 'hui'; the second air inlet holes (31) are square holes.
3. The dust-proof housing structure of a frequency converter according to claim 1, wherein the filter layer comprises a first filter screen layer (27), a second filter screen layer (26), a sponge layer (25) and a third filter screen layer (24) which are sequentially stacked in a gas flow direction; wherein the mesh diameters of the first filter screen layer (27), the second filter screen layer (26) and the third filter screen layer (24) are gradually reduced.
4. The dust-proof casing structure of frequency converter according to claim 1, characterized in that the outer circumferential surface of the sliding plate (21) pressed against the inner wall of the first sliding groove (9) is provided with an elastic sealing gasket (22).
5. The dust-proof housing structure of a frequency converter according to claim 1, characterized in that the end face of the attachment plate (28) remote from the filter box (20) is provided with a handle.
6. The dust-proof housing structure of the frequency converter according to claim 1, wherein each group of shock-absorbing supporting legs comprises a mounting cylinder (15), an insulating base (16), a supporting rod (17), a sliding part (18) and a spring (19);
one end of the mounting cylinder (15) is connected with the shell (1), the other end of the mounting cylinder (15) is provided with a second through hole, and the inner wall of the mounting cylinder (15) is provided with a plurality of groups of second sliding grooves along the central axis direction thereof;
the sliding part (18) is arranged on the supporting rod (17), and the sliding part (18) is connected with the second sliding chute in a sliding fit manner; the central axis of the support rod (17) is superposed with the central axis of the mounting cylinder (15), and one end of the support rod (17) far away from the mounting cylinder (15) is connected with an insulating base (16);
the spring (19) is positioned in the mounting cylinder (15), the spring (19) is sleeved on the outer side of the supporting rod (17), and two ends of the spring (19) are respectively connected with the inner wall of the mounting cylinder (15) and the sliding part (18).
7. The dust-proof housing structure of a frequency converter according to claim 6, characterized in that the projection of the sliding member (18) is ring-shaped, and the sliding member (18) is in screw-fit connection with the supporting rod (17).
8. The dust-proof casing structure of frequency converter according to claim 1, characterized in that each first air inlet hole (6) is provided with a dust-proof filter screen (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020846243.8U CN212137528U (en) | 2020-05-20 | 2020-05-20 | Dustproof housing structure of frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020846243.8U CN212137528U (en) | 2020-05-20 | 2020-05-20 | Dustproof housing structure of frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212137528U true CN212137528U (en) | 2020-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020846243.8U Expired - Fee Related CN212137528U (en) | 2020-05-20 | 2020-05-20 | Dustproof housing structure of frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212137528U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114649766A (en) * | 2020-12-18 | 2022-06-21 | 中国石油化工股份有限公司 | Insulating power equipment box with dustproof construction |
-
2020
- 2020-05-20 CN CN202020846243.8U patent/CN212137528U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114649766A (en) * | 2020-12-18 | 2022-06-21 | 中国石油化工股份有限公司 | Insulating power equipment box with dustproof construction |
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Granted publication date: 20201211 |