GB2182210A - Container for containing a source of high voltage - Google Patents

Container for containing a source of high voltage Download PDF

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Publication number
GB2182210A
GB2182210A GB08624116A GB8624116A GB2182210A GB 2182210 A GB2182210 A GB 2182210A GB 08624116 A GB08624116 A GB 08624116A GB 8624116 A GB8624116 A GB 8624116A GB 2182210 A GB2182210 A GB 2182210A
Authority
GB
United Kingdom
Prior art keywords
container
cavity
source
parts
external surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB08624116A
Other versions
GB8624116D0 (en
Inventor
Kui-Chiu Kwok
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Graco Inc
Original Assignee
Graco Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Graco Inc filed Critical Graco Inc
Publication of GB8624116D0 publication Critical patent/GB8624116D0/en
Publication of GB2182210A publication Critical patent/GB2182210A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/56—Insulating bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/08—Plant for applying liquids or other fluent materials to objects
    • B05B5/10—Arrangements for supplying power, e.g. charging power
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N1/00—Electrostatic generators or motors using a solid moving electrostatic charge carrier

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Casings For Electric Apparatus (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Elimination Of Static Electricity (AREA)

Abstract

A container (2, 3) for a source (1) of high voltage, comprises at least first and second parts (2, 3), wherein the surface distance over the surfaces (2a, 3a) between a cavity (1a) and an external surface (8) is substantially greater than the linear distance between said cavity (1a) and said external surface (8). In the embodiment the surfaces (2a, 3a) are formed by concentric rings and grooves which may be moved together by supports (not shown) on the parts of the container. The container is preferably nylon and the source is an electrostatic power supply for spray equipment. <IMAGE>

Description

SPECIFICATION Container for containing a source of high voltage In order to isolate a high-voltage source from the ground, various techniques have been used. Included in these techniques are the containment ofthe source in a container and the use of an O-ring orsimilarseal to seal any gaps in the container. Also a grease or oil or other high dielectric strength material has been used to fill the gaps in the container. Lastly, the high-voltage source has been completely em bedded in a high dielectric material such as nylon.
According, however, to one aspect of the present invention, there is provided a containerforcontain- ing a source of high voltage,said containercomprising at least first and second parts which adjoin each other, a n i nterio r cavity an interiorcavityforcontaining said source, and an external surface; andjointsurfaces on each of said parts located atthejuncture of said parts, the surface distance over said joint surfaces between said cavity and said external surface being substantially greaterthan the linear distance between said cavity and said external surface.
Preferably, the container has an air passage be tween the said jointsurface ofthe respective parts.
Preferably said joint surfaces are provided on complementary interlocking rings.
Preferably, each said part comprises a plurality of concentric rings.
The container is preferably comprised of a material having a high dielectric strength.
A source of high voltage is preferably disposed within the said cavity, the said source being such that it will are to ground when positioned a pred- etermined distance from the ground, the minimum surface distance between the cavity and the said external surface being greaterthan said predetermined distance.
According to another aspect of the invention, there is provided a container in combination with a source of high voltage, where said voltage source will arcto ground when positioned a predetermined distance from ground, said container comprising: at least first and second parts; a cavity containing said source, said cavity being formed with said parts; an external surface; and joint surfaces on each of said parts located atthejuncture of said parts, the minimum surface distance between said cavity and said external surface being greaterthan said predetermined distance.
The high-voltage source may be that of an electro staticpowersupplyto be used with an electrostatic spray equipment.
The invention is illustrated, merely byway of example, in the accompanying drawing which is a sectional view of a container according to the present invention.
An example of the present invention is shown in the drawing. As shown therein, a high-voltage source, designated 1, is located within an interior cavity 1 a formed in a container which is formed of first and second parts or body portions 2, 3, respectively, the high voltage source 1 being connected to a lead 5 which extends externally of the body portions 2, 3. The container is formed of a material having a high dielectric strength, e.g. nylon. Each of the body portions 2 and 3 is supported by respective support means (not shown) and has a series of concentric rings and grooves which interlock within one another at the juncture of the body portions 2,3, as shown in the drawing, to form a containerforthe present invention.
By relative adjustment of said support means so as to effect appropriate control of the clearances between rings 2a on the body portion 2 and rings 3a on the body portion 3, a path can be provided for air to pass between the voltage source 1 and a possible external ground 4. The actual path length is designated by a dotted line 6 shown in the drawing. The length of the dotted line 6, if straightened out, is many times longer than the shortest path connected between point 7 on the surface of the voltage source 1 and the external ground 4 on the external surface 8 ofthe container 2, 3. For a given voltage, there is a minimum air distance between the high voltage source 1 and the ground 4 such that arcing will occur. As long as the actual air path for a given voltage is longer than the minimum required air distance, no arcing will occur.The construction described above thus provides a way of substantially increasing the air path in a relatively compact container, such as shown in the drawing, to eliminate arcing. If the concentric rings were eliminated by making the body portions 2 and 3 merely butt together, arcing will occur between voltage source and ground 4. However, with the construction shown, the electrons have to travel through the air gap formed between the concentric teeth 3a and 2a.
1. Acontainerforcontaining a sourceof highvol tage, said container comprising at leastfirstand second parts which adjoin each other, an interior cavity for containing said source, and an external surface; and joint surfaces on each of said parts located at the juncture of said parts, the surface distance over said joint surfaces between said cavity and said external surface being substantially greater than the linear distance between said cavity and said external surface.
2. A container as claimed in claim 1 comprising an air passage between the said joint surfaces ofthe respective parts.
3. Acontainerasclaimed inclaim 1 or2wherein said joint surfaces are provided on complementary interlocking rings.
4. A container as claimed in any preceding claim wherein each said part comprises a plurality of concentric rings.
5. A container as claimed in any preceding claim wherein said container is comprised of a material having a high dielectric strength.
6. A container substantially as hereinbefore described with reference to and as shown in the accompanying drawing.
7. A container as claimed in any preceding claim in which a source of high voltage is disposed within the said cavity, the said source being such that it will
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (11)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Container for containing a source of high voltage In order to isolate a high-voltage source from the ground, various techniques have been used. Included in these techniques are the containment ofthe source in a container and the use of an O-ring orsimilarseal to seal any gaps in the container. Also a grease or oil or other high dielectric strength material has been used to fill the gaps in the container. Lastly, the high-voltage source has been completely em bedded in a high dielectric material such as nylon. According, however, to one aspect of the present invention, there is provided a containerforcontain- ing a source of high voltage,said containercomprising at least first and second parts which adjoin each other, a n i nterio r cavity an interiorcavityforcontaining said source, and an external surface; andjointsurfaces on each of said parts located atthejuncture of said parts, the surface distance over said joint surfaces between said cavity and said external surface being substantially greaterthan the linear distance between said cavity and said external surface. Preferably, the container has an air passage be tween the said jointsurface ofthe respective parts. Preferably said joint surfaces are provided on complementary interlocking rings. Preferably, each said part comprises a plurality of concentric rings. The container is preferably comprised of a material having a high dielectric strength. A source of high voltage is preferably disposed within the said cavity, the said source being such that it will are to ground when positioned a pred- etermined distance from the ground, the minimum surface distance between the cavity and the said external surface being greaterthan said predetermined distance. According to another aspect of the invention, there is provided a container in combination with a source of high voltage, where said voltage source will arcto ground when positioned a predetermined distance from ground, said container comprising: at least first and second parts; a cavity containing said source, said cavity being formed with said parts; an external surface; and joint surfaces on each of said parts located atthejuncture of said parts, the minimum surface distance between said cavity and said external surface being greaterthan said predetermined distance. The high-voltage source may be that of an electro staticpowersupplyto be used with an electrostatic spray equipment. The invention is illustrated, merely byway of example, in the accompanying drawing which is a sectional view of a container according to the present invention. An example of the present invention is shown in the drawing. As shown therein, a high-voltage source, designated 1, is located within an interior cavity 1 a formed in a container which is formed of first and second parts or body portions 2, 3, respectively, the high voltage source 1 being connected to a lead 5 which extends externally of the body portions 2, 3. The container is formed of a material having a high dielectric strength, e.g. nylon. Each of the body portions 2 and 3 is supported by respective support means (not shown) and has a series of concentric rings and grooves which interlock within one another at the juncture of the body portions 2,3, as shown in the drawing, to form a containerforthe present invention. By relative adjustment of said support means so as to effect appropriate control of the clearances between rings 2a on the body portion 2 and rings 3a on the body portion 3, a path can be provided for air to pass between the voltage source 1 and a possible external ground 4. The actual path length is designated by a dotted line 6 shown in the drawing. The length of the dotted line 6, if straightened out, is many times longer than the shortest path connected between point 7 on the surface of the voltage source 1 and the external ground 4 on the external surface 8 ofthe container 2, 3. For a given voltage, there is a minimum air distance between the high voltage source 1 and the ground 4 such that arcing will occur. As long as the actual air path for a given voltage is longer than the minimum required air distance, no arcing will occur.The construction described above thus provides a way of substantially increasing the air path in a relatively compact container, such as shown in the drawing, to eliminate arcing. If the concentric rings were eliminated by making the body portions 2 and 3 merely butt together, arcing will occur between voltage source and ground 4. However, with the construction shown, the electrons have to travel through the air gap formed between the concentric teeth 3a and 2a. CLAIMS
1. Acontainerforcontaining a sourceof highvol tage, said container comprising at leastfirstand second parts which adjoin each other, an interior cavity for containing said source, and an external surface; and joint surfaces on each of said parts located at the juncture of said parts, the surface distance over said joint surfaces between said cavity and said external surface being substantially greater than the linear distance between said cavity and said external surface.
2. A container as claimed in claim 1 comprising an air passage between the said joint surfaces ofthe respective parts.
3. Acontainerasclaimed inclaim 1 or2wherein said joint surfaces are provided on complementary interlocking rings.
4. A container as claimed in any preceding claim wherein each said part comprises a plurality of concentric rings.
5. A container as claimed in any preceding claim wherein said container is comprised of a material having a high dielectric strength.
6. A container substantially as hereinbefore described with reference to and as shown in the accompanying drawing.
7. A container as claimed in any preceding claim in which a source of high voltage is disposed within the said cavity, the said source being such that it will arcto ground when positioned a predetermined distancefromtheground,theminimumsurfacedistance between the cavity and the said external surface being greater than said predetermined distance.
8. A container in combination with a source of high voltage, where said voltage source will arcto ground when positioned a predetermined distance from ground, said container comprising: at least first and second parts: a cavity containing said source, said cavity being formed with said parts; an external surface; and joint surfaces on each of said parts located atthejuncture of said parts, the minimum surface distance between said cavity and said external surface being greaterthan said predetermined distance.
9. A container as claimed in claim 8 wherein the linear distance between said cavity and said external surface is less than said predetermined distance.
10. Acontainerasclaimed inclaim8or9com- prising means for allowing airto circulate between said cavity and said external surface.
11. Any novel integer or step, or combination of integers or steps, hereinbefore described and/or as shown in the accompanying drawings, irrespective of whether the present claim is within the scope of, or relatesto the same ora different invention from that of, the preceding claims.
GB08624116A 1985-10-23 1986-10-08 Container for containing a source of high voltage Withdrawn GB2182210A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US79033885A 1985-10-23 1985-10-23

Publications (2)

Publication Number Publication Date
GB8624116D0 GB8624116D0 (en) 1986-11-12
GB2182210A true GB2182210A (en) 1987-05-07

Family

ID=25150370

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08624116A Withdrawn GB2182210A (en) 1985-10-23 1986-10-08 Container for containing a source of high voltage

Country Status (4)

Country Link
JP (1) JPS62130599A (en)
DE (1) DE3635129A1 (en)
FR (1) FR2591843A1 (en)
GB (1) GB2182210A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB756619A (en) * 1953-06-18 1956-09-05 Reyrolle A & Co Ltd Improvements relating to high-voltage electrical apparatus having solid insulation
GB1422565A (en) * 1972-03-25 1976-01-28 Philips Electronic Associated Coil formers for transformers

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4335273A (en) * 1979-05-25 1982-06-15 Electric Power Research Institute, Inc. Electrically insulating seal assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB756619A (en) * 1953-06-18 1956-09-05 Reyrolle A & Co Ltd Improvements relating to high-voltage electrical apparatus having solid insulation
GB1422565A (en) * 1972-03-25 1976-01-28 Philips Electronic Associated Coil formers for transformers

Also Published As

Publication number Publication date
GB8624116D0 (en) 1986-11-12
DE3635129A1 (en) 1987-04-23
JPS62130599A (en) 1987-06-12
FR2591843A1 (en) 1987-06-19

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)