KR20120125756A - A cable gland structure - Google Patents
A cable gland structure Download PDFInfo
- Publication number
- KR20120125756A KR20120125756A KR1020110043383A KR20110043383A KR20120125756A KR 20120125756 A KR20120125756 A KR 20120125756A KR 1020110043383 A KR1020110043383 A KR 1020110043383A KR 20110043383 A KR20110043383 A KR 20110043383A KR 20120125756 A KR20120125756 A KR 20120125756A
- Authority
- KR
- South Korea
- Prior art keywords
- explosion
- proof
- epoxy resin
- weight
- cable gland
- Prior art date
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/013—Sealing means for cable inlets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/02—Cable terminations
- H02G15/04—Cable-end sealings
- H02G15/043—Cable-end sealings with end caps, e.g. sleeve closed at one end
- H02G15/046—Cable-end sealings with end caps, e.g. sleeve closed at one end with bores or protruding portions allowing passage of cable conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
- H02G3/0406—Details thereof
- H02G3/0412—Heat or fire protective means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/06—Joints for connecting lengths of protective tubing or channels, to each other or to casings, e.g. to distribution boxes; Ensuring electrical continuity in the joint
- H02G3/0616—Joints for connecting tubing to casing
- H02G3/0625—Joints for connecting tubing to casing with means for preventing disengagement of conductors
- H02G3/0666—Joints for connecting tubing to casing with means for preventing disengagement of conductors with means clamping the armour of the conductor
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Cable Accessories (AREA)
Abstract
In the cable gland structure according to the present invention, an epoxy resin explosion-proof unit is installed in a sealing port installed inside the support fixing tube, and mixed with an epoxy resin explosion-proof agent cured at room temperature, and inserted into the sealing port, and the curing time of about one day has elapsed. The epoxy resin explosion-proof agent is hardened so that explosion-proof is always performed satisfactorily regardless of the passage of time, so that explosion-proof performance can be guaranteed permanently, and no wire breakage occurs regardless of the diameter of the wire in the cable where explosion-proof is performed. It is possible to prevent the call quality from being degraded even when using the communication line.
Description
The present invention relates to a cable gland structure provided with a hard airtight resin portion, and more specifically, to an explosion-proof that is inserted into a sealing tube portion in a cable gland structure requiring a ship or explosion-proof structure and hardened to ensure airtightness and does not become an explosion. The present invention relates to a cable gland structure provided with a hard airtight resin portion capable of performing a function (hereinafter referred to as "explosion-proof").
In general, the conventional cable gland structure (A) is installed so that the cable (C) to be connected through the cable (C), the cable gland structure (A) is an elastic packing material such as rubber (3) disposed inside It is packed by means of airtight and explosion proof structure.
That is, the conventional cable gland structure (A), as shown in Figure 1, is a hollow structure, the threaded portion is formed at both ends, one end is fixed to the terminal box (not shown) and the rubber packing elastic material (inside) 3) is provided with a support fixing tube (1) having a sealing port (2) is installed, and a screw portion formed at one end of the support fixing tube (1), the other end is formed with a screw portion and the inside of the armoa of the cable (C) A structure consisting of an AMO clamp ring (4) holding a line (C1), an intermediate fixing tube (6) on which an AMOA cone (5) is arranged, and a cap nut (7) engaged with a screw portion of the intermediate fixing tube (6). to be.
However, the cable gland structure (A) is a rubber-proof elastic packing material (3) to perform the explosion-proof function, this rubber must be replaced because the elasticity is degraded after a certain time can not be satisfactorily performed explosion-proof Since it is impossible to check a large number of cable gland structures A, there is a problem that it is used as it is even if it is not airtight. In particular, the wires C2 having a small diameter in the cable C may be disconnected due to the compression of rubber. There was a problem.
In addition, when such a cable (C) is used as a communication line, noise such as interference of a magnetic field is generated between a plurality of wires (C2) in the cable (C) has a problem that the quality of the communication line is reduced.
SUMMARY OF THE INVENTION An object of the present invention is to solve this problem, and the epoxy resin explosion-proof agent is cured by using the room temperature-curable epoxy resin explosion-proof agent without using the elastic packing material in the explosion-proof means used for the cable gland structure. Irrespective of the explosion protection, it is possible to ensure that the explosion-proof performance is permanently ensured, and that the explosion-proof performance can be guaranteed permanently, and the disconnection of the wire can be prevented regardless of the diameter of the wire in the cable where the explosion-proof is performed. It is to provide a cable gland structure having an epoxy resin explosion-proof part which is not degraded by the call quality.
This object of the present invention is a hollow structure, a screw fixing part is formed at both ends and the sealing port in which the epoxy resin explosion-proof part is disposed, and a screw part formed at one end of the support fixing tube is engaged with the screw part at the other end; It is achieved by the cable gland structure according to the present invention includes an intermediate fixing tube is formed and the Amoan clamp ring for gripping the mooa wire of the cable and an amoacon cone, and a cap nut engaged with the screw portion of the intermediate fixing tube.
In the cable gland structure according to the present invention, an epoxy resin explosion-proof unit is installed in a sealing port installed inside the support fixing tube, and mixed with an epoxy resin explosion-proof agent cured at room temperature, and inserted into the sealing port, and the curing time of about one day has elapsed. The epoxy resin explosion-proof agent is hardened so that explosion-proof is always performed satisfactorily regardless of the passage of time, so that explosion-proof performance can be guaranteed permanently, and no wire breakage occurs regardless of the diameter of the wire in the cable where explosion-proof is performed. It is possible to be not, and there is an excellent effect that the call quality is not degraded by noise even when using the communication line.
1 is a schematic longitudinal cross-sectional view of a conventional cable gland structure
2 is a schematic longitudinal sectional view of a cable gland structure according to a first embodiment of the present invention;
3 is a physical picture of the main material and the curing agent of the epoxy resin explosion-proof agent
As shown in FIG. 2, the cable gland structure A according to the first embodiment of the present invention has a hollow structure in which screw portions 1a are formed at both ends and an epoxy resin explosion-proof portion 8 is installed inside. Meshes with a support fixing tube 1 having a sealing port 2 disposed therein, and a threaded portion 1a formed at one end of the supporting fixing tube 1, and a threaded portion 6a formed at the other end thereof, and an inner side of the cable C An intermediate fixing pipe 6 on which an AMoa
In the cable gland structure A according to the first embodiment of the present invention, except for the epoxy resin explosion-proof portion 8 inserted and hardened inside the sealing port 2, the cable gland structure A has the same components as the conventional cable gland structure. Therefore, detailed description thereof will be omitted.
The epoxy resin explosion-proof agent which forms the said epoxy resin explosion-proof part 8 is used by mixing a main body and a hardening | curing agent as a two-component type.
The epoxy resin explosion-proof agent is to be cured at room temperature in contact with the air, the sufficient strength is exhibited after 24 hours at 25 ℃ room temperature, the same strength is exhibited after 2 hours at a high temperature of 60 ℃ temperature is The lower the curing time, the higher the temperature, the shorter the curing time.
The epoxy resin explosion-proof agent is excellent in flame retardancy is tested by UL94 and excellent in flame retardancy to the degree of V-0, even in a cold resistance test, there is no problem in strength even if it is maintained at -60 ° C for 24 hours, and 672 at 120 ° C. The heat aging resistance was maintained even after maintaining the time. The hardness test result showed that the hardness was 80-90. The bond strength between iron and iron was 130-180 ㎏ / ㎠.
The main material of the epoxy resin explosion-proof agent is 29 to 39% by weight of bisphenol, 1 to 5% by weight of silica fume, and 60 to 70% by weight of aluminum trioxide are mixed with each other to form a paste.
The bisphenol is an aromatic compound composed of two phenols having an alcohol group on the benzene ring. It is synthesized by reacting two phenols and one acetone. Currently, it is used as a raw material for the production of plastics such as polycarbonate or epoxy resin, and in the present invention, 29 to 39% by weight of bisphenol is used.
The fume silica is a by-product obtained by collecting the waste gas generated during the production of silicon alloy, which is ultra fine particles (less than 1 μm), and silicon dioxide (SiO 2) is used as a main component to produce high strength concrete, and the physical property is 90%. The above is spherical, the particle diameter is 1 mu m or less, the average is about 0.1 mu m, the specific surface area is about 20 m 2 / g, the specific gravity 2.1 to 2.2, in the present invention 1 to 5% by weight of silica fume was used.
The aluminum trioxide, which is also called alumina as a compound of aluminum and oxygen, exists naturally in corundum, ruby, sapphire, and the like, and includes α-aluminum oxide, aluminum oxide, and aluminum oxide. The molecular weight is 101.96. Naturally, there are ruby and sapphire, which are produced by corundum, a crystal mineral, and colored by pure corundum. It is known to have various forms, and α-aluminum oxide produced by heating aluminum hydroxide to 300 ° C. or lower is the purest and most stable form. In addition, there is a -crystalline aluminum oxide having poor crystallinity resulting from dehydration of β-aluminum oxide hydrate containing some alkali. 60 to 70% by weight of aluminum trioxide is used.
Thus, 29 to 39% by weight of bisphenol, 1 to 5% by weight of silica fume, and 60 to 70% by weight of aluminum trioxide are mixed with each other to form a paste to prepare the subject of the epoxy resin explosion-proof agent.
The curing agent of the epoxy resin explosion-proof agent is a mixture of 24 to 34% by weight of polyamide, 1 to 5% by weight of silica fume, 65 to 75% by weight of aluminum trioxide is used as a paste.
The polyamide is a polymer linked by an amide bond -CONH-, PA. It is produced by condensation polymerization of diamine and diacid, and classified into aliphatic polyamide, aromatic polyamide, and aliphatic cyclic polyamide. Representative of aliphatic polyamides include nylon 6-6, which are prepared by condensation polymerization of hexamethylenediamine having 6 carbon atoms and adipic acid having 6 carbon atoms. Aromatic polyamide is an aromatic skeleton is introduced to further improve the heat resistance, polyamide is excellent in heat resistance, mechanical properties, electrical properties and chemical resistance, and is used as an engineering plastics to replace metals such as polyacetal.
Thus, 24 to 34 weight% of polyamide, 1 to 5 weight% of silica fumes, and 65 to 75 weight% of aluminum trioxide are mixed, and the hardening | curing agent of an epoxy resin explosion-proof agent is manufactured in paste form.
The subject and the curing agent are used in a state where the ratio is 1: 2 to 2: 1 mixed and cured.
In the state in which the main body and the curing agent of the epoxy resin explosion-proof agent prepared as described above are mixed 1: 1, and the epoxy resin explosion-proof agent is curable, and the cable C is contained inside the cable gland structure A. Epoxy resin explosion-proof agent is pressed into the sealing port 2 to form the epoxy resin explosion-proof part 8 in the sealing port 2, and the sealing port 2 filled with the epoxy resin explosion-proof part 8 supports the fixed tube (1). The intermediate fixing tube having the AMO clamp ring (4) and the AMO cone (5) fixed to the inside, and holding the threaded portion (1a) of the support fixing tube (1) and the armo wire (C1) of the cable (C) inside 6), the screw cap nut 7 of the intermediate fixing tube 6 is fixed, and after 1 day at room temperature in this state, the epoxy resin explosion-proof part 8 in the sealing port 2 It hardens and exhibits explosion-proof performance.
The epoxy resin explosion-proof portion 8 formed as described above is easily sealed since it has a structure filled in a space in an arbitrary form such as flour dough at the beginning of the sealing operation of the cable C in the sealing port 2. Molding is possible in the state that can be explosion-proof in the port (2), and when a predetermined time elapses in this state, it is possible to perform explosion-proof while curing and has the product characteristics as shown in Table 1.
TABLE 1
Since the epoxy resin explosion-proof part 8 lasts for a long period of time without changing its state, it is possible to use the explosion-proof almost until the life of the cable gland structure A. Of course, there is no expense, the epoxy resin explosion-proof part 8 does not apply excessive force to the tight state or explosion-proof wire (C2), there is no damage to the wire, between the epoxy resin explosion-proof Since it is blocked by the unit 8, there is no fear of generating noise such as interference of the magnetic field, and thus more stable use is possible.
The cable gland structure according to the present invention will be said to be capable of repeatedly manufacturing the same product in the industry of manufacturing the cable gland, and thus will be referred to as an industrially applicable invention.
1. Supporting fixing pipe 2.
5. AMOACON 6. Middle Fixing Tube 7. Cap Nut
8. Explosion proof
Claims (1)
The epoxy resin explosion-proof part 8 of the cable gland structure (A) is a cured epoxy resin explosion-proof agent which is cured by mixing a main body and a curing agent,
The main subject of the epoxy resin explosion-proof agent is 29 to 39% by weight of bisphenol, 1 to 5% by weight of silica fume, 60 to 70% by weight of aluminum trioxide are mixed with each other to form a paste,
The curing agent of the epoxy resin explosion-proof agent is 24 to 34% by weight of polyamide, 1 to 5% by weight of silica fume, 65 to 75% by weight of aluminum trioxide is mixed to form a paste,
The cable gland structure, characterized in that the main material and the curing agent is mixed by curing in a ratio of 1: 2 to 2: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020110043383A KR20120125756A (en) | 2011-05-09 | 2011-05-09 | A cable gland structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020110043383A KR20120125756A (en) | 2011-05-09 | 2011-05-09 | A cable gland structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20120125756A true KR20120125756A (en) | 2012-11-19 |
Family
ID=47511257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020110043383A KR20120125756A (en) | 2011-05-09 | 2011-05-09 | A cable gland structure |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR20120125756A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200489524Y1 (en) * | 2018-10-15 | 2019-06-28 | 권갑수 | Cable gland |
| CN111527145A (en) * | 2017-12-29 | 2020-08-11 | 三星Sdi株式会社 | Epoxy resin composition for encapsulating semiconductor device, and semiconductor device encapsulated using the same |
| KR20230139202A (en) * | 2022-03-25 | 2023-10-05 | 다대산업주식회사 | electric cable protection tube for installation on rail roadside |
-
2011
- 2011-05-09 KR KR1020110043383A patent/KR20120125756A/en not_active Application Discontinuation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111527145A (en) * | 2017-12-29 | 2020-08-11 | 三星Sdi株式会社 | Epoxy resin composition for encapsulating semiconductor device, and semiconductor device encapsulated using the same |
| CN111527145B (en) * | 2017-12-29 | 2023-11-17 | 三星Sdi株式会社 | Epoxy resin composition for encapsulating semiconductor device, and semiconductor device encapsulated using the same |
| KR200489524Y1 (en) * | 2018-10-15 | 2019-06-28 | 권갑수 | Cable gland |
| KR20230139202A (en) * | 2022-03-25 | 2023-10-05 | 다대산업주식회사 | electric cable protection tube for installation on rail roadside |
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|---|---|---|---|
| A201 | Request for examination | ||
| E601 | Decision to refuse application |