An isolated inorganic mineral insulated fire-resistant wire

Abstract

The invention discloses an isolated inorganic mineral insulated fire-resistant electric wire, comprising at least three conductors, which are wrapped by a colloid and sealed in an insulating sealing sleeve, wherein the insulating sealing sleeve is provided with a first fireproof insulating layer, a metal shielding layer, a second fireproof insulating layer and an outer sheath in order from the outside, a first annular channel is provided in the first fireproof insulating layer, a second annular channel is provided in the second fireproof insulating layer, a first longitudinal groove is provided on the first fireproof insulating layer, a second longitudinal groove is provided on the metal shielding layer, a third longitudinal groove is provided on the second fireproof insulating layer, and a first and a second glue-bound inorganic mineral layer poured through the three longitudinal grooves are respectively provided in the first and second annular channels; the isolated inorganic mineral insulated fire-resistant electric wire has better fire-resistant performance, and the filling of the inorganic mineral layer is more convenient and uniform, and it saves time and labor.

Description

Technical Field

[0001] The invention relates to a fire-resistant electric wire, in particular to an isolated inorganic mineral insulated fire-resistant electric wire, belonging to the technical field of electric wires and cables. Background Art

[0002] Fire-resistant wires refer to wires that can maintain safe operation for a certain period of time under flame conditions. Fire-resistant wires require that when a fire occurs, the line can still be powered on for a certain period of time, that is, under the condition of a certain flame temperature; it can transmit electrical energy, various control signals, and alarm signals normally within a certain period of time, so that lighting, fire alarm devices, and other emergency equipment can continue to be powered on within a certain period of time, so that rescue work can proceed normally. Based on this, fire-resistant wires have very high requirements for materials. In addition to the conventional fireproof material protective layer, current fire-resistant wires will add an inorganic mineral layer to the fireproof material. For the convenience of adding, the inorganic mineral layer is usually made into powder first, and then filled in, or the powder is placed in a fixed bag and then clamped in the protective layer. However, the disadvantages of this are that it is time-consuming and labor-intensive to fill in, and the filler is unevenly distributed, which will affect the fireproof and fire-resistant effects. Summary of the invention

[0003] The present invention aims at the above problems and proposes an isolated inorganic mineral insulated fire-resistant wire. The isolated inorganic mineral insulated fire-resistant wire has better fire resistance, and the filling of the inorganic mineral layer is more convenient and uniform, and it saves time and labor.

[0004] In order to achieve the above technical objectives, the present invention adopts an isolated inorganic mineral insulated fire-resistant wire, including at least three conductors, which are completely wrapped by a colloid and sealed in an insulating sealing sleeve. The insulating sealing sleeve is composed of a first fireproof insulating layer, a metal shielding layer, a second fireproof insulating layer and an outer sheath in order from the outside. A first annular channel is provided in the first fireproof insulating layer, and a second annular channel is provided in the second fireproof insulating layer. A first longitudinal groove connected to the first annular channel is provided on the first fireproof insulating layer, a second longitudinal groove is provided on the metal shielding layer, and a third longitudinal groove connected to the second annular channel is provided on the second fireproof insulating layer, and the first, second and third longitudinal grooves are located on the same central axis and have equal widths. The first annular channel and the second annular channel are respectively provided with a first colloidal inorganic mineral layer and a second glue-bound inorganic mineral layer poured through the above three longitudinal grooves.

[0005] As a preferred embodiment of the present invention, the first annular channel is a curved annular channel, or a non-curved annular channel; the second annular channel is a curved annular channel, or a non-curved annular channel.

[0006] As a further preferred embodiment of the present invention, the widths of the first annular channel and the second annular channel are the same, both of which are 2-3 mm.

[0007] As a further preferred embodiment of the present invention, the width of the first annular channel is greater than that of the second annular channel, or the width of the first annular channel is smaller than that of the second annular channel.

[0008] As a further preferred embodiment of the present invention, the first and second inorganic mineral layers are mixed by quartz powder, orthoclase powder, plagioclase powder, biotite powder, muscovite powder, amphibole powder, pyroxene powder, lubricant, fireproof glue and inorganic gel in a certain proportion.

[0009] After adopting the above structure, the present invention has the following advantages:

[0010] 1. The present invention adopts a structure in which a ring-shaped channel is opened in the protective layer, which is convenient for filling the inorganic mineral layer;

[0011] 2. The present invention adopts liquid colloidal inorganic mineral layer filling, which can make the distribution of inorganic mineral layer filler in the protective layer more uniform, thereby further improving the fire resistance;

[0012] 3. The present invention uses 7 kinds of inorganic minerals as the inorganic mineral layer, which can further improve the fire resistance of the mineral layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Shown is a cross-sectional structural diagram of the present invention;

[0014] Among them, 1. conductor; 2. colloid; 3. insulating sealing sleeve; 4. first fireproof insulating layer; 5. metal shielding layer; 6. second fireproof insulating layer; 7. outer sheath; 8. first annular channel; 9. second annular channel; 10. first longitudinal groove; 11. second longitudinal groove; 12. third longitudinal groove; 13. first colloidal inorganic mineral layer; 14. second colloidal inorganic mineral layer. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0016] Combination Figure 1 It can be seen that an isolated inorganic mineral insulated fire-resistant wire includes at least three conductors 1. The three conductors 1 are completely wrapped by a gel 2 and sealed in an insulating sealing sleeve 3. The insulating sealing sleeve 3 is composed of a first fireproof insulating layer 4, a metal shielding layer 5, a second fireproof insulating layer 6 and an outer sheath 7 in sequence.

[0017] A first annular channel 8 is provided in the first fireproof insulating layer 4, a second annular channel 9 is provided in the second fireproof insulating layer 6, a first longitudinal groove 10 connected to the first annular channel 8 is provided on the first fireproof insulating layer 4, a second longitudinal groove 11 is provided on the metal shielding layer 5, and a third longitudinal groove 12 connected to the second annular channel 9 is provided on the second fireproof insulating layer 6, and the first longitudinal groove 10, the second longitudinal groove 11 and the third longitudinal groove 12 are located on the same central axis and have equal widths, and the first annular channel 8 and the second annular channel 9 are respectively provided with a first colloidal inorganic mineral layer 13 and a second colloidal inorganic mineral layer 14 poured through the first longitudinal groove 10, the second longitudinal groove 11 and the third longitudinal groove 12.

[0018] In the present invention, the first and second inorganic mineral layers 13 and 14 are preferably mixed with quartz powder, orthoclase powder, plagioclase powder, biotite powder, muscovite powder, amphibole powder, pyroxene powder, lubricant, fireproof glue, and inorganic gel in a certain proportion. At the same time, before mixing, the quartz powder, orthoclase powder, plagioclase powder, biotite powder, muscovite powder, amphibole powder, and pyroxene powder need to be crushed and ground three times to make the quartz powder, orthoclase powder, plagioclase powder, biotite powder, muscovite powder, amphibole powder, and pyroxene powder into absorbent powder.

[0019] In the present invention, the first annular channel 8 is preferably a curved annular channel or a non-curved annular channel; the second annular channel 9 is preferably a curved annular channel or a non-curved annular channel. The first annular channel 8 and the second annular channel 9 have the same width, which is 2-3 mm. At the same time, the width of the first annular channel 8 is greater than that of the second annular channel 9, or the width of the first annular channel 8 is less than that of the second annular channel 9.

[0020] When it is necessary to inject the first colloidal inorganic mineral layer 13 and the second glued inorganic mineral layer 14, the outermost outer sheath 7 may not be wrapped first. After the first colloidal inorganic mineral layer 13 and the second glued inorganic mineral layer 14 are injected through the first longitudinal groove 10, the second longitudinal groove 11, and the third longitudinal groove 12, the first colloidal inorganic mineral layer 13 and the second glued inorganic mineral layer 14 are evenly introduced into the first annular channel 8 with a width greater than that of the second annular channel 9, and finally the outer sheath 7 is wrapped.

[0021] In general, the present invention adopts a structure of opening an annular channel in the protective layer to facilitate the filling of the inorganic mineral layer; and the present invention adopts liquid colloidal inorganic mineral layer filling, which can make the distribution of the inorganic mineral layer filler in the protective layer more uniform, thereby further improving the fire resistance; at the same time, the present invention adopts 7 kinds of inorganic minerals as the inorganic mineral layer, which can further improve the fire resistance of the mineral layer.

[0022] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An isolated inorganic mineral insulated fire-resistant wire, comprising at least three conductors, wherein the conductors are completely wrapped by a colloid and sealed in an insulating sealing sleeve, wherein the insulating sealing sleeve is provided with a first fireproof insulating layer, a metal shielding layer, a second fireproof insulating layer and an outer sheath in order from the outside, characterized in that: A first annular channel is provided in the first fireproof insulating layer, a second annular channel is provided in the second fireproof insulating layer, a first longitudinal groove connected to the first annular channel is provided on the first fireproof insulating layer, a second longitudinal groove is provided on the metal shielding layer, a third longitudinal groove connected to the second annular channel is provided on the second fireproof insulating layer, and the first, second and third longitudinal grooves are located on the same central axis and have equal widths, and a first colloidal inorganic mineral layer and a second colloidal inorganic mineral layer are respectively provided in the first annular channel and the second annular channel through the above three longitudinal grooves.

2. An isolated inorganic mineral insulated fire-resistant wire as claimed in claim 1, characterized in that: The first annular channel is a curved annular channel or a non-curved annular channel; the second annular channel is a curved annular channel or a non-curved annular channel.

3. The isolated inorganic mineral insulated fire-resistant wire according to claim 1, characterized in that: The widths of the first annular channel and the second annular channel are the same, both of which are 2-3 mm.

4. The isolated inorganic mineral insulated fire-resistant wire according to claim 1, characterized in that: The width of the first annular channel is greater than that of the second annular channel, or the width of the first annular channel is smaller than that of the second annular channel.

5. The isolated inorganic mineral insulated fire-resistant wire according to claim 1, characterized in that: The first colloidal inorganic mineral layer and the second colloidal inorganic mineral layer are formed by mixing quartz powder, orthoclase powder, plagioclase powder, biotite powder, muscovite powder, amphibole powder, pyroxene powder, lubricant, fireproof glue and inorganic gel in a certain proportion.

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