阅读说明：本技术 一种矿用隔爆箱内线缆穿墙接线结构 (Cable wall-penetrating wiring structure in mining explosion-proof box ) 是由 梁爱春 龚小兵 赵中太 巫亮 刘奎 鲁轲 李定富 王志宝 程丽 于 2021-07-28 设计创作，主要内容包括：本发明属于矿用防爆领域,涉及一种矿用隔爆箱内线缆穿墙接线结构,包括设置在接线腔与隔爆元件腔之间的中间隔板,中间隔板上开设有通孔,通孔内固定安装有中间转换套,线缆配合安装在该中间转换套内。本发明中间转换套采用上中下三部分,在打水或气压试验时不会移位,达到隔爆要求；混合好的胶封材料在灌封过程中胶料要保温,两种胶混合提高了灌胶封体的韧性和固化性,耐冲击、耐压、耐寒、耐温及耐腐蚀；中间转换套的空腔内设置有上下沟槽结构,可使灌胶封与套体紧密结合,防止胶体脱落；同时本发明整个结构精密小巧,可以在保证信号不失真的情况下传入隔爆元件腔中的传感器中,有效的促进了矿井下精密仪器仪表的监测和信号传输效果。(The invention belongs to the field of mine explosion prevention, and relates to a cable through-wall wiring structure in a mine explosion-proof box. The middle conversion sleeve adopts an upper part, a middle part and a lower part, and cannot shift during a water-pumping or air pressure test, so that the explosion-proof requirement is met; the mixed glue sealing material is subjected to heat preservation in the process of filling and sealing, and the mixing of the two kinds of glue improves the toughness and the curing property of the filled glue sealing body, and has the advantages of impact resistance, pressure resistance, cold resistance, temperature resistance and corrosion resistance; an upper groove structure and a lower groove structure are arranged in the cavity of the middle conversion sleeve, so that the glue pouring seal can be tightly combined with the sleeve body, and the colloid is prevented from falling off; meanwhile, the whole structure of the invention is precise and small, and the invention can be transmitted into the sensor in the cavity of the explosion-proof element without distortion of signals, thereby effectively promoting the monitoring and signal transmission effects of precise instruments and meters under the mine.)

1. The utility model provides a cable wall wiring structure in mining flame proof case, is including setting up the intermediate bottom between wiring chamber and flame proof component chamber, has seted up the through-hole on the intermediate bottom, its characterized in that: a middle conversion sleeve is fixedly arranged in the through hole, and a cable is arranged in the middle conversion sleeve in a matching mode.

2. The cable wall-penetrating wiring structure in the mining explosion-proof box according to claim 1, characterized in that: the middle conversion sleeve comprises a boss at the upper part, an explosion-proof surface at the middle part and a thread at the lower part; one side of the boss is arranged in the wiring cavity, one side of the thread is arranged in the explosion-proof element cavity, and the diameter of the boss is larger than that of the through hole.

3. The cable wall-penetrating wiring structure in the mining explosion-proof box according to claim 2, characterized in that: an adjusting gasket is additionally arranged on the middle conversion sleeve on one side of the explosion-proof element cavity, and a thickened fastening nut for fixing is arranged on the outer side of the adjusting gasket.

4. The cable wall-penetrating wiring structure in the mining explosion-proof box according to claim 2, characterized in that: the surface roughness of the explosion-proof surface and the fit clearance of the through hole meet the requirements of mining explosion-proof.

5. The cable wall-penetrating wiring structure in the mining explosion-proof box according to claim 1, characterized in that: a cavity is arranged in the middle conversion sleeve, and the diameter of the cavity is 2-3 times of that of the cable;

the cavity was machined with 2 grooves.

6. The cable wall-penetrating wiring structure in the mining explosion-proof box according to claim 5, characterized in that: the cable is arranged in the cavity and is provided with a wire stripping section, and the length of the wire stripping section is 10mm and is more than 5mm away from two end faces of the middle conversion sleeve.

7. The cable wall-penetrating wiring structure in the mining explosion-proof box according to claim 6, characterized in that: the cavity of the middle conversion sleeve is also internally provided with a rubber seal wrapping the cable.

8. The cable wall-penetrating wiring structure in the mining explosion-proof box according to claim 7, characterized in that: the glue sealing material adopts two resin glues of E44 epoxy resin and 650 polyamide resin according to the proportion of 1: 1, and blending the components in a ratio of 1.

Technical Field

The invention belongs to the field of mine explosion prevention, and relates to a cable wall-through wiring structure in a mine explosion-proof box.

Background

At present, the requirement of electrical products used in domestic mines meets the requirement of mine explosion suppression, wherein a 220V high-voltage-level explosion suppression control box can not be directly connected with external control and monitoring components through cables, the explosion suppression box is generally divided into an explosion suppression component cavity and a wiring cavity, the explosion suppression component cavity and the wiring cavity are separated by a partition plate, the explosion suppression component cavity and the wiring cavity are subjected to a water pressure test and an air pressure test of 1MPa and a spark explosion propagation test, and in order to achieve the purposes of signal transmission and power supply, the general mode is as follows: the mining wiring terminal (or mining aerial plug connector) is installed on the partition plate, the electronic element in the explosion-proof cavity is connected with an external control and monitoring device through the wiring terminal, but in practical application, the situation that signals of some micro-electric control or monitoring devices are seriously deviated after being switched through the wiring terminal or the monitoring value is abnormally jumped is found, and even milliampere or millivolt level monitoring elements are difficult to transmit the signals into a signal receiver in the explosion-proof cavity.

Disclosure of Invention

In view of the above, the present invention provides a cable through-wall wiring structure in a mining explosion-proof box, in which a micro-electrical signal line is directly introduced into an explosion-proof element cavity and directly connected to a receiver, so as to solve the problem of micro-electrical signal distortion and achieve the requirement of mining explosion-proof.

In order to achieve the purpose, the invention provides the following technical scheme: a wall-through cable connection structure in a mining explosion-proof box comprises a middle partition plate arranged between a connection cavity and an explosion-proof element cavity, wherein a through hole is formed in the middle partition plate, a middle conversion sleeve is fixedly installed in the through hole, and a cable is installed in the middle conversion sleeve in a matched mode.

Optionally, the middle conversion sleeve comprises a boss at the upper part, an explosion-proof surface at the middle part and a thread at the lower part; one side of the boss is arranged in the wiring cavity, one side of the thread is arranged in the explosion-proof element cavity, and the diameter of the boss is larger than that of the through hole.

Optionally, an adjusting gasket is additionally arranged on the middle conversion sleeve on one side of the explosion-proof element cavity, and a thickened fastening nut for fixing is arranged on the outer side of the adjusting gasket.

Optionally, the surface roughness of the explosion-proof surface and the fit clearance of the through hole meet the requirements of mining explosion-proof.

Optionally, a cavity is arranged in the middle conversion sleeve, and the diameter of the cavity is 2-3 times of that of the cable; the cavity was machined with 2 grooves.

Optionally, the cable is placed in the cavity and provided with a stripping section, and the length of the stripping section is 10mm and is more than 5mm away from two end faces of the middle conversion sleeve.

Optionally, a rubber seal wrapping the cable is further disposed in the cavity of the middle conversion sleeve.

Optionally, the adhesive material is prepared by adhering two kinds of resin, namely E44 epoxy resin and 650 polyamide resin, according to the weight ratio of 1: 1, and blending the components in a ratio of 1.

The invention has the beneficial effects that: according to the cable through-wall wiring structure in the mining explosion-proof box, the middle conversion sleeve adopts an upper part, a middle part and a lower part, the boss at the upper part plays a role in preventing falling off, the middle explosion-proof surface is matched with the through hole of the middle partition plate to prevent spark propagation explosion, the lower part thread can be matched with the nut to fix the mechanism, and the mechanism cannot shift during water pumping or air pressure test, so that the explosion-proof requirement is met; the glue sealing material needs heat preservation encapsulation in the mixing process, the toughness and the curing property of the encapsulation colloid are improved by mixing the two kinds of glue, and the impact resistance, the pressure resistance, the cold resistance, the temperature resistance and the corrosion resistance are much higher than those of a single colloid; an upper groove structure and a lower groove structure are arranged in the cavity of the middle conversion sleeve, so that the pouring sealant can be tightly combined with the sleeve body, and the colloid is prevented from falling off. The whole structure of the invention is precise and small, has the same size with a common wiring terminal or a navigation plug, can be transmitted into a sensor in a cavity of an explosion-proof element under the condition of ensuring no distortion of signals, and effectively promotes the monitoring and signal transmission effects of precise instruments and meters under a mine.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic overall structure diagram of a cable wall-through wiring structure in a mining explosion-proof box.

Reference numerals: the cable stripping device comprises a middle conversion sleeve 1, a rubber seal 2, a cable 3, a middle partition plate 4, an adjusting gasket 5, a thickened fastening nut 6 and a stripping section 7.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.

Please refer to fig. 1, which is a cable through-wall wiring structure in a mining explosion-proof box, comprising a middle partition plate 4 arranged between a wiring cavity and an explosion-proof element cavity, wherein the middle partition plate 4 is provided with a through hole, a middle conversion sleeve 1 is fixedly installed in the through hole, a cable 3 is installed in the middle conversion sleeve 1 in a matching manner, and the middle conversion sleeve 1 comprises an upper boss, a middle explosion-proof surface and a lower thread; one side of a boss is arranged in a wiring cavity, one side of a thread is arranged in a flame-proof element cavity, the diameter of the boss is larger than that of a through hole, an adjusting gasket 5 is additionally arranged on the middle conversion sleeve 1 on one side of the flame-proof element cavity, a thickening fastening nut 6 for fixing is arranged on the outer side of the adjusting gasket 5, the surface roughness of a flame-proof surface meets the requirement of flame-proof for mining, a matching gap with the through hole meets the requirement of flame-proof for mining, and a cavity is arranged in the middle conversion sleeve 1 and has the diameter 2-3 times that of a cable 3; 2 grooves are processed in the cavity, the cable 3 is arranged in the cavity and is provided with a stripping section 7, the length of the stripping section 7 is 10mm and is more than 5mm away from two end faces of the middle conversion sleeve 1, and a glue seal 2 wrapping the cable 3 is further arranged in the cavity of the middle conversion sleeve 1.

When the cable stripping device is used, the cable 3 is stripped at a proper position (a sufficient wiring distance is reserved), the sheath of about 10mm is then inserted into the hole, the distance between the stripping section 7 and the end faces of the upper and lower orifices is more than 5mm, the glue is injected and encapsulated, and the cable stripping device is placed still for more than 48h (the time is prolonged when the temperature is low in winter) until the glue encapsulation 2 meets certain requirements on hardness and toughness.

In this embodiment, the material of the glue seal 2 is two resin glues, i.e. E44 epoxy resin and 650 polyamide resin, in a ratio of 1: 1, the mixed glue in the filling and sealing process must be subjected to heat preservation filling and sealing, otherwise, the glue is easy to solidify when meeting cold, so that the glue seal 2 is provided with air holes and is easy to lose explosion.

The whole structure of the invention is precise and small, has the same size with a common wiring terminal or a navigation plug, can be transmitted into a sensor in a cavity of an explosion-proof element under the condition of ensuring no distortion of signals, and effectively promotes the monitoring and signal transmission effects of precise instruments and meters under a mine.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.