Curing system for sealing an electrical fitting

Patent metadata

Field	Value
Publication number	US-9059580-B2
Application number	US-201213658418-A
Country	US
Kind code	B2
Filing date	Oct 23, 2012
Priority date	Nov 10, 2011
Publication date	Jun 16, 2015
Grant date	Jun 16, 2015

Abstract

A system for curing a sealing compound provided in an electrical fitting, includes a curing chamber for receiving at least a portion of the electrical fitting therein, wherein the electrical fitting received within the curing chamber comprises a body and a sealing sleeve configured to engage the forward end of the body during assembly of the fitting to receive the two or more conductors of an electrical cable passing through the body. The sealing sleeve is configured to receive an ultra-violet (UV)-curable sealing compound therein, such that the sealing compound flows between the two or more conductors during filling of the sealing sleeve. The system further includes a plurality of UV light sources configured to provide UV light into the curing chamber to cure the UV-curable sealing compound and to initiate curing of the UV-curable sealing compound in the sealing sleeve.

First claim

What is claimed is:

1. A system for curing a sealing compound provided in an electrical fitting, comprising:
a curing chamber configured to receive at least a portion of the electrical fitting therein,
wherein the electrical fitting received within the curing chamber comprises:
a fitting body having a central bore extending therethrough, a forward end, and a cable receiving end,
wherein the central bore is configured to receive an electrical cable therethrough,
a sealing sleeve configured to engage the forward end of the fitting body during assembly of the electrical fitting to receive two or more conductors of the electrical cable passing through the fitting body,
wherein the sealing sleeve is configured to receive an ultra-violet (UV)-curable sealing compound therein, such that the UV-curable sealing compound flows between the two or more conductors during a filling of the sealing sleeve,
wherein the sealing sleeve includes a transparent portion, and
a sealing cartridge configured for receipt within the sealing sleeve prior to engagement of the sealing sleeve with the body,
wherein the sealing cartridge includes a plurality of longitudinal notches therein, the plurality of longitudinal notches configured to receive the two or more conductors and to maintain the two or more conductors in a spaced relationship; and

one or more UV light sources configured to provide UV light into the curing chamber to cure the UV-curable sealing compound,

wherein the one or more of UV light sources is configured to initiate curing of the UV-curable sealing compound in the sealing sleeve.

2. The system of claim 1 , wherein the sealing sleeve comprises a transparent or translucent material.

3. The system of claim 1 , wherein the UV-curable sealing compound comprises a multi-functional polyurethane material.

4. The system of claim 1 , wherein the UV-curable sealing compound comprises a synthesized polyurethane acrylate that includes UV-reactive cross-linkers.

5. The system of claim 1 , wherein the plurality of UV light sources are configured to provide UV light into the curing chamber to cure the UV-curable sealing compound at a temperature of less than 70° Fahrenheit.

6. The system of claim 5 , wherein the sealing cartridge includes a transparent portion.

7. The system of claim 6 , wherein the sealing cartridge comprises a transparent or translucent material.

8. The system of claim 1 , wherein the sealing cartridge further includes a sealant delivery tube, formed axially within a forward portion of the sealing cartridge, and configured to receive the sealing compound,
wherein a rearward portion of the sealing cartridge includes a sealant receiving chamber coupled to the sealant delivery tube to allow the sealing compound to flow from the sealant delivery tube between the two or more conductors in the positioned in the plurality of longitudinal notches following an insertion of the sealing cartridge within the sealing sleeve.

9. The system of claim 8 , wherein one or more of the longitudinal notches extend along an entire length of the sealing cartridge.

10. The system of claim 1 , wherein the plurality of UV light sources comprises an array of UV light sources configured to provide 360° impingement of UV light on the sealing sleeve.

11. The system of claim 10 , wherein each of the plurality of UV light sources is configured to emit UV-A light having an intensity of between 20,000 and 90,000 microwatts per centimeter squared at a distance of six inches.

12. The system of 1 , wherein the curing chamber comprises a generally tubular structure for surrounding the fitting.

13. The system of claim 1 , wherein the curing chamber is configured to receive the sealing sleeve following an engagement of the sealing sleeve with the body.

14. The system of claim 1 , wherein the electrical fitting further comprises:
a cap guide element initially positioned in the electrical fitting axially between a gland nut and a main nut,
wherein the main nut is coupled to the fitting body and the gland nut is coupled to the main nut,
wherein a forward advancement of the electrical cable through the gland nut causes the two or more conductors to engage the cap guide element, and
wherein a continued forward advancement of the electrical cable in the electrical fitting causes the cap guide element to advance through the fitting and to maintain the two or more conductors in a grouped relationship as the electrical cable proceeds through the fitting.

15. The system of claim 1 , further comprising:
a resilient seal formed at an aperture of the curing chamber.

16. A system, comprising:
an electrical fitting, comprising:
a fitting body having a central bore extending therethrough,
wherein the central bore is configured to receive an electrical cable therethrough;
a sealing sleeve configured to engage the fitting body during assembly of the electrical fitting to receive two or more conductors of the electrical cable passing through the fitting body; and
a sealing cartridge configured for receipt within the sealing sleeve prior to engagement of the sealing sleeve with the body,
wherein the sealing cartridge includes a plurality of longitudinal notches therein, the plurality of longitudinal notches configured to receive the two or more conductors and to maintain the two or more conductors in a spaced relationship,
wherein the sealing sleeve is configured to receive an ultra-violet (UV)-curable sealing compound therein, such that the UV-curable sealing compound flows between the two or more conductors during a filling of the sealing sleeve, and
wherein the sealing sleeve and the sealing cartridge include at least transparent or partially transparent portions to facilitate impingement of UV light from one or more UV light sources onto the UV-curable sealing compound through the transparent or partially transparent portions of the sealing cartridge and the sealing sleeve;

a curing chamber for receiving at least the sealing sleeve; and
a UV light source to initiate curing of the UV-curable sealing compound within the curing chamber.

17. The system of claim 16 , wherein the sealing sleeve engages a forward end of the fitting body.

18. The system of claim 16 , wherein the UV light source comprises an array of UV light sources to provide 360° impingement of UV light on the sealing sleeve within the curing chamber.

19. The system of claim 18 , wherein each of the UV light sources in the array of UV light sources emits UV-A light having an intensity of between 20,000 and 90,000 microwatts per centimeter squared at a distance of six inches.

20. The system of claim 18 , wherein the array of UV light sources comprises a plurality of light sources and a plurality of reflectors.

21. The system of claim 16 , wherein the curing chamber comprises:
an access aperture for receiving the sealing sleeve; and
a resilient seal formed at the access aperture of the curing chamber.

22. The system of claim 16 , wherein the UV-curable sealing compound comprises a synthesized polyurethane acrylate that includes UV-reactive cross-linkers.

Assignees

• Thomas & Betts Int
• Thomas & Betts Int Llc

Inventors

• Magno Jr Joey D

Classifications

• H02G15/013 Primary

  Sealing means for cable inlets (inlets for cables filled with, or surrounded by, gas or oil H02G15/32) · CPC title