CN216209366U - DC test shielding device for converter valve lightning arrester - Google Patents
DC test shielding device for converter valve lightning arrester Download PDFInfo
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- CN216209366U CN216209366U CN202122468285.XU CN202122468285U CN216209366U CN 216209366 U CN216209366 U CN 216209366U CN 202122468285 U CN202122468285 U CN 202122468285U CN 216209366 U CN216209366 U CN 216209366U
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- 238000012986 modification Methods 0.000 description 3
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- 230000005540 biological transmission Effects 0.000 description 2
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- 239000007769 metal material Substances 0.000 description 1
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Abstract
The utility model discloses a direct-current test shielding device of a converter valve arrester, which comprises a shell, a flexible shielding curtain and a grounding cover plate positioned below the shell, wherein a connecting part used for connecting an equalizing ring on a converter valve is arranged on the shell, the shielding curtain is folded and accommodated in the shell, one end of the shielding curtain is connected with the shell, the other end of the shielding curtain is connected with the grounding cover plate, the grounding cover plate is detachably connected with the shell, and a grounding part is arranged on the grounding cover plate. The electromagnetic field leakage testing device has the advantages of being small in structure, capable of leaking an electromagnetic field formed in the direct current test of the converter valve arrester into the ground, avoiding the damage of the space electromagnetic field to each component of the converter valve and the like.
Description
Technical Field
The utility model relates to direct-current transmission equipment, in particular to a direct-current test shielding device of a converter valve arrester.
Background
The converter valve is core equipment of a direct current transmission project and comprises components such as a thyristor, a damping capacitor, a voltage-sharing capacitor, a damping resistor, a voltage-sharing resistor, a saturable reactor and a thyristor control unit. Because the direct current test voltage is higher, and the space distance between the lightning arrester and each component is limited, when the direct current test is carried out on the lightning arrester on the converter valve, each component can not bear the interference of an electromagnetic field, so that the components are easily damaged, and the normal work of the converter valve is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a shielding device which is small in structure, can drain an electromagnetic field formed in a direct-current test of a converter valve arrester into the ground and avoids the damage of a space electromagnetic field to each component of a converter valve.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides a converter valve arrester direct current test shield assembly, includes casing, flexible shielding curtain and the ground connection apron that is located the casing below, be equipped with the adapting unit who is used for connecting the equalizer ring on the converter valve on the casing, the shielding curtain is folding accomodate in just one end is connected with the casing in the casing, the shielding curtain other end with ground connection cover connection, ground connection apron with the connection can be dismantled to the casing, is equipped with ground connection part on the ground connection apron.
As a further improvement of the above technical solution: the shielding curtain comprises a conductive cloth layer and an insulating cloth layer arranged on the conductive cloth layer.
As a further improvement of the above technical solution: the insulating cloth layer is adhered to the conductive cloth layer.
As a further improvement of the above technical solution: the shell and the shielding curtain and the grounding cover plate are bonded through conductive adhesives.
As a further improvement of the above technical solution: the connecting part is a hook.
As a further improvement of the above technical solution: the shell is provided with a first sleeve, the connecting part is provided with a second sleeve, and the first sleeve is movably sleeved with the second sleeve.
As a further improvement of the above technical solution: the first sleeve is provided with at least one pin hole along the axial direction, and the second sleeve is provided with at least two pin holes along the axial direction; or the first sleeve is provided with at least two pin holes along the axial direction, and the second sleeve is provided with at least one pin hole along the axial direction; one pin hole of the first sleeve is connected with one pin hole of the second sleeve through a bolt.
As a further improvement of the above technical solution: the connecting parts are provided with two parts and are respectively arranged at two ends of the shell.
As a further improvement of the above technical solution: the shell is provided with a handle.
As a further improvement of the above technical solution: the grounding cover plate is connected with the shell through a lock catch.
Compared with the prior art, the utility model has the advantages that: according to the direct-current test shielding device for the converter valve arrester, the shielding curtain is folded and stored in the shell, so that the whole device is small in size and light in weight, and is convenient for field test personnel to mount and dismount. When the shielding curtain is used, the connecting part is connected with the equalizing ring at the uppermost end of the converter valve curtain, the shell is detached from the grounding cover plate, the shielding curtain freely drops along with the grounding cover plate under the action of gravity, and then the grounding part on the grounding cover plate is grounded. When a direct current test is carried out on the lightning arrester on the converter valve, an electromagnetic field generated by high voltage is conducted to the shielding device through space, and the shielding device and the ground are equal potential bodies, so that the electromagnetic field leaks into the ground through the shielding device, and all components of the converter valve behind the shielding device are protected from being damaged by the high voltage electromagnetic field, thereby ensuring the normal work of all components and ensuring the power supply reliability.
Drawings
Fig. 1 is a schematic perspective view of a dc test shielding device of a converter valve arrester according to the present invention.
Fig. 2 is a schematic perspective view of the housing of the present invention.
Fig. 3 is a schematic perspective view of the connecting member in the present invention.
Fig. 4 is a partial perspective view of the shielding curtain of the present invention.
Fig. 5 is a schematic perspective view of the ground cover plate according to the present invention.
The reference numerals in the figures denote: 1. a housing; 11. a connecting member; 12. a first sleeve; 13. a second sleeve; 14. a pin hole; 15. a handle; 2. a shielding curtain; 21. a conductive cloth layer; 22. an insulating cloth layer; 3. a ground cover plate; 31. a grounding member; 4. and (5) locking.
Detailed Description
The utility model is described in further detail below with reference to the figures and specific examples of the specification.
Fig. 1 to 5 show an embodiment of a converter valve arrester dc test shielding device according to the present invention, which includes a housing 1, a flexible shielding curtain 2, and a grounding cover plate 3 located below the housing 1, wherein the housing 1 is provided with a connecting member 11 for connecting an equalizing ring on a converter valve, the shielding curtain 2 is folded and accommodated in the housing 1, and one end of the shielding curtain is connected to the housing 1, the other end of the shielding curtain 2 is connected to the grounding cover plate 3, the grounding cover plate 3 is detachably connected to the housing 1, and the grounding cover plate 3 is provided with a grounding member 31. Among them, the case 1 is preferably made of a metal material such as aluminum; the grounding cover plate 3 is preferably made of an aluminum plate or an iron plate; the grounding member 31 may be, for example, a conventional grounding bolt or the like.
This experimental shield assembly of converter valve arrester direct current, shielding curtain 2 are folding to be accomodate inside 1 casing for a whole set of shield assembly is small, light in weight, makes things convenient for field test personnel to install and dismantle (converter valve mounted position is higher liftoff, generally about tens meters, adopts beta structure can guarantee that a tester can be light, convenient completion installation and dismantlement). When the shielding device is used, the connecting part 11 is connected with the equalizing ring at the uppermost end of the converter valve curtain, the connection between the shell 1 and the grounding cover plate 3 is disassembled, so that the shielding curtain 2 freely drops along with the grounding cover plate 3 under the action of gravity, and then the grounding part 31 on the grounding cover plate 3 is grounded, so that the whole shielding device becomes a ground potential. When a direct-current test is carried out on the lightning arrester on the converter valve, an electromagnetic field generated by high voltage is conducted to the shielding device through space, and the shielding device and the ground are equal potential bodies, so that the electromagnetic field leaks into the ground through the shielding device, and all components of the converter valve behind the shielding device are protected from being damaged by the high-voltage electromagnetic field, so that the normal work of all the components is ensured, and the power supply reliability is guaranteed.
Further, in the present embodiment, the shielding curtain 2 includes a conductive fabric layer 21 and an insulating fabric layer 22 disposed on the conductive fabric layer 21. The shielding curtain 2 adopts the double-layer superposed structure of the conductive cloth layer 21 and the insulating cloth layer 22, can effectively prevent each component of the converter valve from suffering the infringement of an electromagnetic field, ensures the normal operation of the converter valve, improves the power supply reliability, and the conductive cloth layer 21 and the insulating cloth layer 22 have the advantages of light weight and easy folding storage. When the lightning arrester is used specifically, the conductive cloth layer 21 faces the side where the lightning arrester is located, and the insulating cloth layer 22 faces the side where the converter valve is located, so that a layer of insulating shielding can be added behind the conductive cloth layer 21 to isolate the conductive cloth layer 21 from the converter valve. Preferably, the properties of the conductive cloth layer 21 satisfy: the shielding effectiveness is more than 60db, the surface resistance is not more than 0.05 omega, and the electromagnetic field shielding range is 20M-10 GHz.
As a preferred embodiment, the insulating cloth layer 22 may be adhered to the conductive cloth layer 21 by a conductive adhesive, or the insulating cloth layer 22 is an insulating tape, which has self-adhesive property, simple and reliable structure, and convenient manufacture, and does not increase the weight of the shielding device itself too much.
As a preferred embodiment, the shell 1 and the shielding curtain 2 and the grounding cover plate 3 are bonded through the conductive adhesive, the connection structure is reliable, the manufacture is convenient, and the weight of the shielding device is not increased too much.
Further, in the present embodiment, the connecting member 11 is a hook. The hook is adopted, the structure is simple, the shell 1 is conveniently connected with the uniform pressure ring at the uppermost end of the converter valve, and the hook is convenient to detach after the test.
Furthermore, in the present embodiment, the housing 1 is provided with a first sleeve 12, the connecting member 11 is provided with a second sleeve 13, and the first sleeve 12 is movably sleeved with the second sleeve 13. The movable sleeve structure is adopted, so that the relative position between the connecting part 11 and the shell 1 can be conveniently adjusted, and further the positions of the shell 1, the shielding curtain 2 and the grounding cover plate 3 can be adjusted.
In a preferred embodiment, the first sleeve 12 is provided with a plurality of pin holes 14 along the axial direction, and the second sleeve 13 is provided with one pin hole 14 along the axial direction; a pin hole 14 of the first sleeve 12 is connected with a pin hole 14 of the second sleeve 13 by a bolt (not shown). After the bolt is pulled out, the relative positions of the first sleeve 12 and the second sleeve 13 can be adjusted along the axial direction, so that the shielding curtain 2 and the converter valve are kept parallel; after the adjustment, the pin is inserted into the pin hole 14 again to fix the first sleeve 12 and the second sleeve 13. Of course, in other embodiments, only one pin hole 14 may be provided on the first sleeve 12, and a plurality of pin holes 14 may be provided in the second sleeve 13 along the axial direction; alternatively, the first sleeve 12 and the second sleeve 13 are provided with a plurality of pin holes 14 in the axial direction, and the adjustment of the axial position can also be achieved.
As a preferred embodiment, the connecting members 11 are provided in two and are divided at both ends of the housing 1, which facilitates a reliable connection of the housing 1 with the converter valve.
In a preferred embodiment, the housing 1 is provided with a handle 15 to facilitate the shielding device to be held by a tester.
As the preferred embodiment, the grounding cover plate 3 is connected with the shell 1 through the lock catch 4, the structure is simple, the connection is reliable, and the grounding cover plate 3 is convenient to connect with or detach from the shell 1. The latch 4 may be, for example, a conventional elastic latch for connecting the case body and the case cover. The grounding cover plate 3 can be a plate made of a whole conductive material and is connected with the lower end of the shielding curtain 2, and also can be a pressing strip made of a plurality of conductive materials arranged on the edge part of the lower end of the shielding curtain 2, so that the lower end of the shielding curtain 2 can be shaped and the shielding curtain 2 can be driven to freely droop.
The working principle of the utility model is as follows: the hooks of the shielding devices (preferably, two shielding devices are adopted simultaneously) are hung on the equalizing ring at the uppermost end of the converter valve curtain respectively, the relative positions of the first sleeve 12 and the second sleeve 13 are adjusted along the axial direction, so that the shielding curtain 2 is kept parallel to the converter valve, then the lock catch 4 between the shielding device shell 1 and the grounding cover plate 3 is opened, the shielding curtain 2 is enabled to freely fall along with the grounding cover plate 3, and the grounding bolts on the grounding cover plates 3 of the two shielding devices are connected and grounded. When a direct current test is carried out on the lightning arrester on the converter valve, an electromagnetic field generated by high voltage is conducted to the shielding device through space, and the shielding device and the ground are equal potential bodies, so that the electromagnetic field leaks into the ground through the shielding device, the converter valve body behind the shielding device is protected from being damaged by the high voltage electromagnetic field, normal work of each component is guaranteed, and power supply reliability is guaranteed.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the utility model, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (10)
1. The utility model provides a converter valve arrester direct current test shield assembly which characterized in that: including casing (1), flexible shielding curtain (2) and be located ground connection apron (3) of casing (1) below, be equipped with on casing (1) and be used for connecting adapting unit (11) of equalizer ring on the converter valve, shielding curtain (2) are folding accomodate in casing (1) are interior and one end is connected with casing (1), shielding curtain (2) other end with ground connection apron (3) are connected, ground connection apron (3) with casing (1) can be dismantled and connect, is equipped with ground connection part (31) on ground connection apron (3).
2. The direct-current test shielding device of the converter valve arrester according to claim 1, characterized in that: the shielding curtain (2) comprises a conductive cloth layer (21) and an insulating cloth layer (22) arranged on the conductive cloth layer (21).
3. The direct-current test shielding device of the converter valve arrester according to claim 2, characterized in that: the insulating cloth layer (22) is adhered to the conductive cloth layer (21).
4. The direct-current test shielding device of the converter valve arrester according to claim 1, characterized in that: the shell (1) and the shielding curtain (2) and the grounding cover plate (3) are bonded through conductive adhesives.
5. The direct-current test shielding device of the converter valve arrester according to any one of claims 1 to 4, characterized in that: the connecting part (11) is a hook.
6. The direct-current test shielding device of the converter valve arrester according to claim 5, characterized in that: the shell (1) is provided with a first sleeve (12), the connecting part (11) is provided with a second sleeve (13), and the first sleeve (12) is movably sleeved with the second sleeve (13).
7. The direct-current test shielding device of the converter valve arrester according to claim 6, characterized in that: the first sleeve (12) is provided with at least one pin hole (14) along the axial direction, and the second sleeve (13) is provided with at least two pin holes (14) along the axial direction; or at least two pin holes (14) are axially formed in the first sleeve (12), and at least one pin hole (14) is axially formed in the second sleeve (13); one pin hole (14) of the first sleeve (12) is connected with one pin hole (14) of the second sleeve (13) through a bolt.
8. The direct-current test shielding device of the converter valve arrester according to claim 5, characterized in that: the connecting parts (11) are provided with two parts and are respectively arranged at two ends of the shell (1).
9. The direct-current test shielding device of the converter valve arrester according to any one of claims 1 to 4, characterized in that: the shell (1) is provided with a handle (15).
10. The direct-current test shielding device of the converter valve arrester according to any one of claims 1 to 4, characterized in that: the grounding cover plate (3) is connected with the shell (1) through a lock catch (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122468285.XU CN216209366U (en) | 2021-10-13 | 2021-10-13 | DC test shielding device for converter valve lightning arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122468285.XU CN216209366U (en) | 2021-10-13 | 2021-10-13 | DC test shielding device for converter valve lightning arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216209366U true CN216209366U (en) | 2022-04-05 |
Family
ID=80865561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122468285.XU Active CN216209366U (en) | 2021-10-13 | 2021-10-13 | DC test shielding device for converter valve lightning arrester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216209366U (en) |
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2021
- 2021-10-13 CN CN202122468285.XU patent/CN216209366U/en active Active
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