CN210245829U - Magnesium oxide insulation fire-resistant cable - Google Patents
Magnesium oxide insulation fire-resistant cable Download PDFInfo
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- CN210245829U CN210245829U CN201921261921.8U CN201921261921U CN210245829U CN 210245829 U CN210245829 U CN 210245829U CN 201921261921 U CN201921261921 U CN 201921261921U CN 210245829 U CN210245829 U CN 210245829U
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Abstract
The utility model discloses an insulating fire-resistant cable of magnesium oxide, be located second casing one side including first casing and second casing, the axis of first casing and second casing is located same straight line, the inside of first casing is run through and is provided with first cable core and second cable core, first cable core is located second cable core below, the inside of second casing and the department of correspondence of first cable core and second cable core run through respectively and are provided with third cable core and fourth cable core, the inside of first casing and second casing is provided with insulating filler, the fixed cover of the one end that the outer wall of first casing is close to the second casing has fixed cover to connect. The utility model discloses in through setting up first fixed cover, the fixed cover of second, first sealing washer, second sealing washer and sealing ring etc. when guaranteeing that insulating fire-resistant cable is stable to be connected, provide good leakproofness, avoided taking place because of the condition of the circuit short circuit that the joint wets into water and leads to.
Description
Technical Field
The utility model relates to a fireproof cable field especially relates to insulating fire-resistant cable of magnesium oxide.
Background
A mineral insulated cable, a kind of cable which uses copper sheath to wrap the copper conductor core wire, and uses magnesia powder as inorganic insulating material to isolate conductor and sheath, the outmost layer can select proper protective sleeve according to the need, the cable will not burn, will not support combustion, can continue to operate under the condition close to flame, the mineral insulated cable can endure the continuous operation temperature up to 250 ℃. In addition, in an emergency, the cable can continue to operate in a short time at a temperature close to the melting point of the copper sheath, has good mechanical strength and explosion resistance, and has small outer diameter and long service life.
However, the joint of the existing insulating fire-resistant wire is easy to be wetted by water, which causes short circuit of the wire, and even causes water seepage in the mineral insulating layer when the wire is serious, and the whole wire needs to be maintained or replaced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art, and provides a magnesium oxide insulating fire-resistant cable.
In order to achieve the above purpose, the utility model adopts the following technical scheme: insulating fire-resistant cable of magnesium oxide is located second casing one side including first casing and second casing, the axis of first casing and second casing is located same straight line, the inside of first casing is run through and is provided with first cable core and second cable core, first cable core is located second cable core below, the inside of second casing and the department that corresponds of first cable core and second cable core run through respectively and are provided with third cable core and fourth cable core, the inside of first casing and second casing is provided with insulating filler, the fixed cover of the one end that the outer wall of first casing is close to the second casing has connect first fixed cover, the fixed cover of the one end that the outer wall of second casing is close to first casing has connected the fixed cover of second.
As a further description of the above technical solution:
the length of the first cable core positioned outside the first shell is larger than that of the second cable core positioned outside the first shell, the length of the third cable core is the same as that of the second cable core, and the length of the fourth cable core is the same as that of the first cable core.
As a further description of the above technical solution:
the cable comprises a first shell, a second shell and a third cable core, wherein the first shell is fixedly connected with a first sealing gasket at one end close to the second shell, the second shell is fixedly connected with a second sealing gasket at one end close to the first shell, the first cable core and one end of the second cable core penetrate through the first sealing gasket, and the third cable core and one end of the fourth cable core penetrate through the second sealing gasket.
As a further description of the above technical solution:
the outer wall of second cable core and fourth cable core is fixed the cover jointly and has been cup jointed conductive cover, the outer wall of first cable core and third cable core is also fixed the cover that has cup jointed conductive cover jointly, two the one end of conductive cover is sealed the pad fixed connection with first or the sealed pad of second respectively, two the outer wall of conductive cover is fixed the cover that has cup jointed insulating cover.
As a further description of the above technical solution:
the outer wall surface of the first cable core, which is positioned outside the first shell and the insulating sleeve, is provided with an insulating layer, and the outer wall surface of the fourth cable core, which is positioned outside the second shell and the insulating sleeve, is also provided with an insulating layer.
As a further description of the above technical solution:
the one end of first fixed cover is provided with first sealing washer, the movable sleeve has been cup jointed to the outer wall of first fixed cover, the one end inner wall and the contact of first sealing washer and first fixed cover of movable sleeve, the other end integrated into one piece of movable sleeve has the go-between, the outer wall of movable sleeve is close to the fixed first cooperation ring that has cup jointed of go-between department.
As a further description of the above technical solution:
the fixed cover of second is close to the one end lateral wall of first fixed cover and has seted up the cooperation groove, cooperation inslot portion is provided with compression spring, and the fixed cover of second is close to the fixed second cooperation ring that has cup jointed of one end outer wall of first fixed cover.
As a further description of the above technical solution:
the go-between passes through screw thread and cooperation groove fixed connection, and the one end and the compression spring contact of go-between, the one end and the fixed cover contact of second sealing washer and second of movable sleeve, first cooperation ring and the contact of second cooperation ring, and the outer wall that just first cooperation ring and second cooperation ring cup jointed the sealing ring, the outer wall that first cooperation ring, second cooperation ring and sealing ring is fixed to have cup jointed the clamp.
The utility model discloses following beneficial effect has:
1. the utility model discloses a set up fixed cover of first fixed cover, second, first sealing washer, second sealing washer and sealing ring etc. when guaranteeing insulating fire-resistant cable stable connection, provide good leakproofness, avoided taking place because of the condition of the circuit short circuit that the joint wets into water and leads to.
2. The utility model discloses a set up first sealed pad and the sealed pad of second, can prevent effectively that the insulating filler in the casing from appearing not hard up the condition emergence of revealing or intaking and weing.
Drawings
Fig. 1 is a schematic structural view of a magnesium oxide insulating fire-resistant cable according to the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
fig. 3 is an enlarged view at B in fig. 1.
Illustration of the drawings:
1. a first housing; 11. a first cable core; 12. a second cable core; 2. a second housing; 21. a third cable core; 22. a fourth cable core; 3. an insulating filler; 4. a first fixing sleeve; 41. a movable sleeve; 411. a connecting ring; 412. a first mating ring; 42. a first seal ring; 5. a second fixing sleeve; 51. a mating groove; 52. A compression spring; 53. a second seal ring; 54. a second mating ring; 6. clamping a hoop; 61. a seal ring; 71. A first gasket; 72. a second gasket; 81. a conductive sleeve; 82. and an insulating sleeve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-3, the present invention provides an embodiment: the magnesium oxide insulation fire-resistant cable comprises a first shell 1 and a second shell 2, wherein the first shell 1 is located on one side of the second shell 2, the axes of the first shell 1 and the second shell 2 are located on the same straight line, a first cable core 11 and a second cable core 12 are arranged inside the first shell 1 in a penetrating mode, the first cable core 11 is located below the second cable core 12, a third cable core 21 and a fourth cable core 22 are respectively arranged in the second shell 2 and corresponding positions of the first cable core 11 and the second cable core 12 in a penetrating mode, insulation fillers 3 are arranged inside the first shell 1 and the second shell 2, the insulation fillers 3 are mainly made of magnesium oxide powder, a first fixing sleeve 4 is fixedly sleeved at one end, close to the second shell 2, of the outer wall of the first shell 1, and a second fixing sleeve 5 is fixedly sleeved at one end, close to the first shell 1, of the outer wall of the second shell 2.
The length of the first cable core 11 positioned outside the first shell 1 is greater than that of the second cable core 12 positioned outside the first shell 1, the length of the third cable core 21 is the same as that of the second cable core 12, and the length of the fourth cable core 22 is the same as that of the first cable core 11; one end of the first shell 1 close to the second shell 2 is fixedly connected with a first sealing gasket 71, one end of the second shell 2 close to the first shell 1 is fixedly connected with a second sealing gasket 72, one ends of the first cable core 11 and the second cable core 12 penetrate through the first sealing gasket 71, and one ends of the third cable core 21 and the fourth cable core 22 penetrate through the second sealing gasket 72; the outer walls of the second cable core 12 and the fourth cable core 22 are fixedly sleeved with a conductive sleeve 81, the outer walls of the first cable core 11 and the third cable core 21 are also fixedly sleeved with the conductive sleeves 81, one ends of the two conductive sleeves 81 are fixedly connected with the first sealing gasket 71 or the second sealing gasket 72 respectively, and the outer walls of the two conductive sleeves 81 are fixedly sleeved with an insulating sleeve 82; the outer wall surfaces of the first cable core 11, which are positioned outside the first shell 1 and the insulating sleeve 82, are provided with insulating layers, and the outer wall surfaces of the fourth cable core 22, which are positioned outside the second shell 2 and the insulating sleeve 82, are also provided with insulating layers; a first sealing ring 42 is arranged at one end of the first fixing sleeve 4, a movable sleeve 41 is sleeved on the outer wall of the first fixing sleeve 4, the inner wall of one end of the movable sleeve 41 is in contact with the first sealing ring 42 and the first fixing sleeve 4, a connecting ring 411 is integrally formed at the other end of the movable sleeve 41, and a first matching ring 412 is fixedly sleeved on the outer wall of the movable sleeve 41 close to the connecting ring 411; a matching groove 51 is formed in the side wall of one end, close to the first fixing sleeve 4, of the second fixing sleeve 5, a compression spring 52 is arranged in the matching groove 51, and a second matching ring 54 is fixedly sleeved on the outer wall of one end, close to the first fixing sleeve 4, of the second fixing sleeve 5; the connecting ring 411 is fixedly connected with the matching groove 51 through threads, one end of the connecting ring 411 is in contact with the compression spring 52, one end of the movable sleeve 41 is in contact with the second sealing ring 53 and the second fixing sleeve 5, the first matching ring 412 is in contact with the second matching ring 54, the outer walls of the first matching ring 412 and the second matching ring 54 are sleeved with the sealing ring 61, and the clamp 6 is fixedly sleeved on the outer walls of the first matching ring 412, the second matching ring 54 and the sealing ring 61.
The working principle is as follows: when the cable is installed, after the movable sleeve 41 is sleeved on the outer wall of the first shell 1, the first fixed sleeve 4 and the second fixed sleeve 5 are fixedly connected with the first shell 1 and the second shell 2 by using high temperature resistant sealant with the model of GL-1250, the first sealing gasket 71 and the second sealing gasket 72 are respectively fixedly and hermetically connected with the end parts of the first shell 1 and the second shell 2, after the conductive sleeve 81 and the insulating sleeve 82 are respectively sleeved on the outer walls of the second cable core 12 and the third cable core 21, the first cable core 11 is butted with the third cable core 21, the fourth cable core 22 is butted with the second cable core 12, then the conductive sleeve 81 and the insulating sleeve 82 are fixed, the movable sleeve 41 is pushed to the second fixed sleeve 5, the connecting ring 411 is fixedly connected with the matching groove 51 by using threads, meanwhile, the end part of the cable core 411 presses the compression spring 52, the elastic force of the compression spring 52 is used for ensuring the stable connection of the connecting ring 411 and the matching groove 51, at this time, the first mating ring 412 is tightly contacted with the second mating ring 54, and the clamp 6 is installed after the sealing ring 61 is sleeved on the outer wall surfaces of the first mating ring 412 and the second mating ring 54.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (8)
1. Insulating fire-resistant cable of magnesium oxide, including first casing (1) and second casing (2), its characterized in that: the first shell (1) is positioned at one side of the second shell (2), the axes of the first shell (1) and the second shell (2) are positioned on the same straight line, a first cable core (11) and a second cable core (12) are arranged in the first shell (1) in a penetrating way, the first cable core (11) is positioned below the second cable core (12), a third cable core (21) and a fourth cable core (22) respectively penetrate through the corresponding positions of the inside of the second shell (2) and the first cable core (11) and the second cable core (12), the first shell (1) and the second shell (2) are internally provided with insulating fillers (3), a first fixing sleeve (4) is fixedly sleeved at one end of the outer wall of the first shell (1) close to the second shell (2), and a second fixing sleeve (5) is fixedly sleeved at one end of the outer wall of the second shell (2) close to the first shell (1).
2. The magnesium oxide insulated refractory cable of claim 1, wherein: the length of a first cable core (11) positioned outside the first shell (1) is larger than that of a second cable core (12) positioned outside the first shell (1), the length of the third cable core (21) is the same as that of the second cable core (12), and the length of the fourth cable core (22) is the same as that of the first cable core (11).
3. The magnesium oxide insulated refractory cable of claim 1, wherein: the cable is characterized in that the first shell (1) is close to a first sealing gasket (71) of one end fixedly connected with of the second shell (2), the second shell (2) is close to a second sealing gasket (72) of one end fixedly connected with of the first shell (1), the first sealing gasket (71) is penetrated through one ends of the first cable core (11) and the second cable core (12), and the second sealing gasket (72) is penetrated through one ends of the third cable core (21) and the fourth cable core (22).
4. The magnesium oxide insulated refractory cable of claim 3, wherein: the outer wall of second cable core (12) and fourth cable core (22) is fixed jointly to have cup jointed conductive sleeve (81), the outer wall of first cable core (11) and third cable core (21) is also fixed jointly to have cup jointed conductive sleeve (81), two the one end of conductive sleeve (81) respectively with first sealed pad (71) or the sealed pad (72) fixed connection of second, two the outer wall of conductive sleeve (81) is fixed to have cup jointed insulating cover (82).
5. The magnesium oxide insulated refractory cable of claim 3 or 4, wherein: the outer wall surface of the first cable core (11) located outside the first shell (1) and the insulating sleeve (82) is provided with an insulating layer, and the outer wall surface of the fourth cable core (22) located outside the second shell (2) and the insulating sleeve (82) is also provided with an insulating layer.
6. The magnesium oxide insulated refractory cable of claim 1, wherein: the one end of first fixed cover (4) is provided with first sealing washer (42), the outer wall of first fixed cover (4) has cup jointed movable sleeve (41), the one end inner wall and first sealing washer (42) and the contact of first fixed cover (4) of movable sleeve (41), the other end integrated into one piece of movable sleeve (41) has go-between (411), the outer wall of movable sleeve (41) is close to the fixed cover of go-between (411) department and has been connect first cooperation ring (412).
7. The magnesium oxide insulated refractory cable of claim 1, wherein: the fixed cover of second (5) is close to the one end lateral wall of first fixed cover (4) and has seted up cooperation groove (51), cooperation groove (51) inside is provided with compression spring (52), and the fixed cover of second (5) is close to the fixed second cooperation ring (54) that has cup jointed of one end outer wall of first fixed cover (4).
8. The magnesium oxide insulated refractory cable of claim 6, wherein: the utility model discloses a clamp, including go-between (411), go-between (41), activity cover (41), go-between (411) and second cooperation ring (54), go-between (411) pass through screw thread and cooperation groove (51) fixed connection, and the one end and the compression spring (52) contact of go-between (411), the one end and the fixed cover (5) contact of second sealing washer (53) and second of activity cover (41), first cooperation ring (412) and the contact of second cooperation ring (54), and the outer wall of first cooperation ring (412) and second cooperation ring (54) has cup jointed sealing ring (61), the outer wall of first cooperation ring (412), second cooperation ring (54) and sealing ring (61) is fixed to have cup jointed clamp (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921261921.8U CN210245829U (en) | 2019-08-06 | 2019-08-06 | Magnesium oxide insulation fire-resistant cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921261921.8U CN210245829U (en) | 2019-08-06 | 2019-08-06 | Magnesium oxide insulation fire-resistant cable |
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| Publication Number | Publication Date |
|---|---|
| CN210245829U true CN210245829U (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921261921.8U Active CN210245829U (en) | 2019-08-06 | 2019-08-06 | Magnesium oxide insulation fire-resistant cable |
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| CN (1) | CN210245829U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113471726A (en) * | 2021-07-08 | 2021-10-01 | 浙江卡迪夫电缆有限公司 | High-flexibility flat cable |
-
2019
- 2019-08-06 CN CN201921261921.8U patent/CN210245829U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113471726A (en) * | 2021-07-08 | 2021-10-01 | 浙江卡迪夫电缆有限公司 | High-flexibility flat cable |
| CN113471726B (en) * | 2021-07-08 | 2023-05-23 | 浙江卡迪夫电缆有限公司 | High-flexibility flat cable |
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