CN111314798A - Mining intrinsically safe explosion-proof communication device - Google Patents
Mining intrinsically safe explosion-proof communication device Download PDFInfo
- Publication number
- CN111314798A CN111314798A CN202010125292.7A CN202010125292A CN111314798A CN 111314798 A CN111314798 A CN 111314798A CN 202010125292 A CN202010125292 A CN 202010125292A CN 111314798 A CN111314798 A CN 111314798A
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- Prior art keywords
- explosion
- box body
- proof box
- communication device
- interphone
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
- H04Q5/24—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange for two-party-line systems
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/06—Hermetically-sealed casings
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Computer Networks & Wireless Communication (AREA)
- Casings For Electric Apparatus (AREA)
Abstract
The invention discloses a mining intrinsic safety type explosion-proof communication device, relates to the field of mining area communication equipment, and aims to solve the problems that an existing mining communication device is not provided with an active cooling and flame-retardant mechanism, and when the existing mining communication device is applied to a mine opening filled with inflammable gas, the existing mining communication device has large potential safety hazards, and the inflammable gas is easy to explode. The novel explosion-proof door is characterized in that a vacuum cavity is formed in the second explosion-proof box body, an interphone body mounting seat is arranged at the middle position inside the vacuum cavity and welded to the inner wall of the second explosion-proof box body, and an interphone body shell is fixedly mounted on the outer surface of one side of the interphone body mounting seat.
Description
Technical Field
The invention relates to the field of mining area communication and contact equipment, in particular to a mining intrinsic safety type explosion-proof communication device.
Background
With the development of society, the progress of industry and the progress of human science and technology, people are more and more understood to utilize mineral resources on the earth to promote living environment and promote technological level, and need to mine the mine before people use mineral resources, according to different mine distributions, people also are different in orientation and depth of mine hole when mining, when getting into operation of deeper mine hole, because wireless signal can't get into in the mine hole, therefore often adopt wired communication equipment to communicate.
The existing mine communication device is not provided with an active cooling and flame-retardant mechanism, when the existing mine communication device is applied to a mine hole filled with inflammable gas, a large potential safety hazard exists, the inflammable gas is easy to explode, and in order to actively retard flame and cool the communication device and avoid explosion; therefore, the market urgently needs to develop a mining intrinsic safety type explosion-proof communication device to help people solve the existing problems.
Disclosure of Invention
The invention aims to provide a mining intrinsic safety type explosion-proof communication device, which solves the problems that the existing mining communication device in the background technology has no active cooling and flame-retardant mechanism, has larger potential safety hazard when being applied to a mine opening filled with inflammable gas, and easily causes the inflammable gas to explode.
In order to achieve the purpose, the invention provides the following technical scheme: the mining intrinsic safety type explosion-proof communication device comprises a second explosion-proof box body, wherein a vacuum cavity is formed in the second explosion-proof box body, an interphone body mounting seat is arranged at the middle position inside the vacuum cavity, the interphone body mounting seat is welded to the inner wall of the second explosion-proof box body, and an interphone body shell is fixedly mounted on the outer surface of one side of the interphone body mounting seat.
Preferably, the second explosion-proof box body is located in the middle of the first explosion-proof box body, the second explosion-proof box body is fixedly connected with the first explosion-proof box body through a connecting rod, a cooling liquid is filled in a cavity between the second explosion-proof box body and the first explosion-proof box body, the second explosion-proof box body is soaked in the cooling liquid, a first sealing guide pipe and a second sealing guide pipe are fixedly installed on the outer surfaces of the first explosion-proof box body and the second explosion-proof box body respectively, one end of the first sealing guide pipe and one end of the second sealing guide pipe are arranged in the second explosion-proof box body, the other end of the first sealing guide pipe and the other end of the second sealing guide pipe are arranged outside the second explosion-proof box body respectively, and an interphone chip is fixedly installed in the inner portion of the shell of the interphone body.
Preferably, the welding has two fixed support bar on the bottom surface of first explosion-proof box, the other end welding of fixed support bar is on the upper end surface of removal mounting panel, four corners of removal mounting panel bottom surface are provided with a universal wheel respectively, the one end welding of removal mounting panel upper end surface has the communication cable conductor to accomodate the support, the communication cable conductor is accomodate the support and is the Y type, and communication cable conductor accomodates support and removal mounting panel vertical distribution.
Preferably, the intercom chip is electrically connected with the loudspeaker and the intercom switch respectively, the intercom switch is electrically connected with the microphone, and a connecting cable of the intercom chip, the loudspeaker and the intercom switch runs through the middle shaft position of the second sealing guide pipe.
Preferably, loudspeaker and talkback switch are fixed mounting respectively in the inside of intercom microphone shell body, and talkback switch fixed mounting is in the side position department of intercom microphone shell body, be provided with the through-hole on the surface of intercom microphone shell body, and the position of through-hole corresponds with the position of loudspeaker and microphone respectively.
Preferably, the outer shell of the interphone is buckled inside the interphone microphone placing seat, and a protective cap is arranged above the interphone microphone placing seat.
Preferably, an intrinsically safe communication cable junction box is fixedly mounted at one end of the first sealing guide pipe, the intrinsically safe communication cable junction box is electrically connected with the interphone chip, and a connecting cable of the intrinsically safe communication cable junction box and the interphone chip penetrates through the middle shaft of the first sealing guide pipe.
Preferably, a through hole is formed in the outer surface of one side of the second explosion-proof box body, a vacuum exhaust pipe is fixedly connected to one end of the through hole, a control valve is arranged in the middle of the vacuum exhaust pipe, and a plurality of reinforcing rib plates are welded to the inner wall of the second explosion-proof box body.
Preferably, a through hole is formed in the outer surface of the upper end of the first explosion-proof box body, a cooling liquid inlet pipe is fixedly connected to one end of the through hole, and a control valve is arranged in the middle of the cooling liquid inlet pipe.
Preferably, one end of each of the first sealing guide pipe and the second sealing guide pipe is arranged to be a collet chuck structure, a rubber block is arranged in the collet chuck structure, and adjusting nuts are arranged on the outer surfaces of one ends of the first sealing guide pipe and the second sealing guide pipe and are in threaded connection with the outer surface of the collet chuck structure.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the interior of the second explosion-proof box body is set to be the vacuum cavity, the interphone body mounting seat is arranged at the middle position in the vacuum cavity, the interphone body mounting seat is welded on the inner wall of the second explosion-proof box body, and the interphone body shell is fixedly mounted on the outer surface of one side of the interphone body mounting seat, so that the vacuum can be used for flame retardance, the phenomenon that external inflammable gas is ignited when an internal electronic element sparks is avoided, the explosion is avoided, the safety is effectively improved, the device has an active flame retardant mechanism, and meanwhile, the electronic element is fixedly mounted in the second explosion-proof box body, so that the device has the explosion-proof function;
2. the second explosion-proof box body is arranged in the middle of the first explosion-proof box body, the second explosion-proof box body is fixedly connected with the first explosion-proof box body through the connecting rod, a cooling liquid is filled in a cavity between the second explosion-proof box body and the first explosion-proof box body, the second explosion-proof box body is soaked in the cooling liquid, a first sealing guide pipe and a second sealing guide pipe are fixedly arranged on the outer surfaces of the first explosion-proof box body and the second explosion-proof box body respectively, one end of the first sealing guide pipe and one end of the second sealing guide pipe are arranged in the second explosion-proof box body, the other end of the first sealing guide pipe and the other end of the second sealing guide pipe are arranged outside the second explosion-proof box body respectively, and an interphone chip is fixedly arranged in the shell of the interphone body, so that the second explosion-proof box body can be cooled by the cooling liquid, the temperature in the second explosion-proof box body is effectively prevented from being transmitted to the outside of, thereby preventing the external inflammable gas from reaching the ignition point and exploding, so that the device has the function of active cooling and the functionality of the device is improved;
3. according to the device, two fixed support rods are welded on the outer surface of the bottom end of the first explosion-proof box body, the other ends of the fixed support rods are welded on the outer surface of the upper end of the movable mounting plate, four corners of the outer surface of the bottom end of the movable mounting plate are respectively provided with a universal wheel, one end of the outer surface of the upper end of the movable mounting plate is welded with the communication cable storage bracket, the communication cable storage bracket is Y-shaped, and the communication cable storage bracket and the movable mounting plate are vertically distributed.
Drawings
FIG. 1 is a schematic view of the internal structure of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is an enlarged view of the invention at A;
FIG. 4 is a side view of the present invention;
fig. 5 is a front view of the communication cable storage rack of the present invention.
In the figure: 1. moving the mounting plate; 2. a universal wheel; 3. fixing the support rod; 4. a first explosion-proof box body; 5. cooling liquid; 6. a second explosion-proof box body; 7. a vacuum exhaust pipe; 8. a coolant inlet pipe; 9. an intrinsically safe communication cable junction box; 10. a first sealed conduit; 11. a second sealed conduit; 12. a protective cap; 13. a microphone placing seat of the interphone; 14. an interphone microphone outer shell; 15. a horn; 16. an intercom switch; 17. a microphone; 18. a communication cable storage bracket; 19. a vacuum chamber; 20. reinforcing rib plates; 21. an interphone body mounting base; 22. a main body casing of the interphone; 23. interphone chip.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-5, an embodiment of the present invention is shown: the utility model provides a mining ann's type flame proof communication device, including second explosion-proof box 6, the inside vacuum chamber 19 that sets up to that sets up of second explosion-proof box 6, the inside intermediate position department of vacuum chamber 19 is provided with intercom body mount pad 21, intercom body mount pad 21 welds on the inner wall of second explosion-proof box 6, fixed mounting has intercom body shell 22 on one side surface of intercom body mount pad 21, this can utilize the vacuum to carry out fire-retardant, avoided inside electronic component when the spark appears, and ignite outside combustible gas, thereby the explosion has been avoided appearing, the effectual security that has improved, make the device possess initiative fire-retardant mechanism, electronic component fixed mounting is in the inside of second explosion-proof box 6 simultaneously, make the device possess flame proof effect and function.
Further, the second explosion-proof box body 6 is positioned in the middle of the first explosion-proof box body 4, the second explosion-proof box body 6 is fixedly connected with the first explosion-proof box body 4 through a connecting rod, a cooling liquid 5 is filled in a cavity between the second explosion-proof box body 6 and the first explosion-proof box body 4, the second explosion-proof box body 6 is soaked in the cooling liquid 5, a first sealing guide pipe 10 and a second sealing guide pipe 11 are respectively and fixedly installed on the outer surfaces of the first explosion-proof box body 4 and the second explosion-proof box body 6, one end of the first sealing guide pipe 10 and one end of the second sealing guide pipe 11 are arranged in the second explosion-proof box body 6, the other end of the first sealing guide pipe 10 and the other end of the second sealing guide pipe 11 are respectively arranged outside the second explosion-proof box body 6, an interphone chip 23 is fixedly installed inside the interphone body shell 22, the second explosion-proof box body 6 can be cooled by the cooling liquid 5, and the internal temperature of the second explosion-proof box body 6 is effectively isolated from being transmitted to the outside of the first explosion-, thereby avoided outside inflammable gas to reach the ignition point, and blast for the device has possessed the function of initiative cooling, has improved the device's functionality.
Further, the welding has two fixed support rod 3 on the bottom surface of first explosion-proof box 4, the other end welding of fixed support rod 3 is on the upper end surface of movable mounting panel 1, four corners of the 1 bottom surface of movable mounting panel are provided with an universal wheel 2 respectively, the one end welding of the 1 upper end surface of movable mounting panel has communication cable conductor to accomodate support 18, communication cable conductor accomodates support 18 and is the Y type, and communication cable conductor accomodates support 18 and movable mounting panel 1 vertical distribution, this can carry out position shifting to the device through universal wheel 2, the device of being convenient for shifts the position in the mine cave, the practicality is improved, the convenience of operation has also been improved simultaneously.
Further, the intercom chip 23 is electrically connected with the speaker 15 and the intercom switch 16 respectively, the intercom switch 16 is electrically connected with the microphone 17, and the connecting cables of the intercom chip 23, the speaker 15 and the intercom switch 16 penetrate through the position of the center axis of the second sealing conduit 11.
Further, loudspeaker 15 and talkback switch 16 are fixed mounting respectively in the inside of intercom microphone shell body 14, and talkback switch 16 fixed mounting is in the side position department of intercom microphone shell body 14, is provided with the through-hole on the surface of intercom microphone shell body 14, and the position of through-hole corresponds with loudspeaker 15 and microphone 17's position respectively.
Further, the interphone microphone outer housing 14 is fastened inside the interphone microphone holder 13, and a protective cap 12 is disposed above the interphone microphone holder 13.
Furthermore, an intrinsically safe communication cable junction box 9 is fixedly installed at one end of the first sealing guide pipe 10, the intrinsically safe communication cable junction box 9 is electrically connected with the interphone chip 23, and a connecting cable of the intrinsically safe communication cable junction box 9 and the interphone chip 23 penetrates through the middle shaft of the first sealing guide pipe 10.
Further, a through hole is formed in the outer surface of one side of the second explosion-proof box body 6, a vacuum exhaust pipe 7 is fixedly connected to one end of the through hole, a control valve is arranged in the middle of the vacuum exhaust pipe 7, and a plurality of reinforcing rib plates 20 are welded to the inner wall of the second explosion-proof box body 6.
Further, be provided with the through-hole on the upper end surface of first explosion-proof box 4, and the one end fixedly connected with coolant liquid inlet tube 8 of through-hole, the intermediate position department of coolant liquid inlet tube 8 is provided with control flap.
Further, one end of each of the first sealing conduit 10 and the second sealing conduit 11 is provided with a collet structure, a rubber block is mounted inside the collet structure, and an adjusting nut is arranged on the outer surface of one end of each of the first sealing conduit 10 and the second sealing conduit 11 and is in threaded connection with the outer surface of the collet structure.
The working principle is as follows: when in use, firstly, the communication cable wire outside the mine hole is connected, then the mobile mounting plate 1 is pushed to enable the mobile mounting plate 1 to move to the position inside the mine hole, when the mobile mounting plate moves to the appointed position, abundant communication cable wires are wound at one end of the communication cable wire containing bracket 18, when the mobile mounting plate needs to communicate with the outside of the mine hole, only the interphone microphone outer shell 14 needs to be taken down from the interphone microphone placing seat 13, then the talkback switch 16 is pressed down, at the moment, the microphone 17 is electrically connected with the interphone chip 23, meanwhile, the speaker 15 is also electrically connected with the interphone chip 23, therefore, a user can communicate with the outside of the mine hole, as the interphone chip 23 is arranged inside the interphone body shell 22, the interphone body shell 22 is arranged on the outer surface of one side of the interphone body mounting seat 21, the interphone body mounting seat 21 is arranged inside the vacuum cavity 19, therefore when the intercom chip 23 spark appears in the in-process of work, the vacuum cavity 19 can be effectual stretching of fire-retardant spark, the security performance is improved, simultaneously because the second explosion-proof box 6 soaks in the inside of coolant liquid 5, consequently can the conduction of the inside temperature of effectual separation second explosion-proof box 6, thereby can effectually avoid the high temperature of first explosion-proof box 4, and then the temperature of having avoided on the first explosion-proof box 4 surface reaches outside combustible gas's ignition point, outside combustible gas has been avoided exploding.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The utility model provides a mining ann's type flame proof communication device, includes second explosion-proof box (6), its characterized in that: the novel explosion-proof door is characterized in that a vacuum cavity (19) is formed in the second explosion-proof box body (6), an interphone body mounting seat (21) is arranged at the middle position inside the vacuum cavity (19), the interphone body mounting seat (21) is welded to the inner wall of the second explosion-proof box body (6), and an interphone body shell (22) is fixedly mounted on the outer surface of one side of the interphone body mounting seat (21).
2. The mining intrinsically safe flameproof communication device according to claim 1, characterized in that: the second explosion-proof box body (6) is positioned in the middle of the first explosion-proof box body (4), the second explosion-proof box body (6) is fixedly connected with the first explosion-proof box body (4) through a connecting rod, a cavity between the second explosion-proof box body (6) and the first explosion-proof box body (4) is filled with cooling liquid (5), the second explosion-proof box body (6) is soaked in the cooling liquid (5), a first sealing guide pipe (10) and a second sealing guide pipe (11) are respectively and fixedly arranged on the outer surfaces of the first explosion-proof box body (4) and the second explosion-proof box body (6), one end of the first sealing conduit (10) and one end of the second sealing conduit (11) are arranged in the second explosion-proof box body (6), the other ends of the first sealing conduit (10) and the second sealing conduit (11) are respectively arranged outside the second explosion-proof box body (6), an interphone chip (23) is fixedly arranged inside the interphone body shell (22).
3. The mining intrinsically safe flameproof communication device according to claim 2, characterized in that: the welding has two fixed support pole (3) on the bottom surface of first explosion-proof box (4), the other end welding of fixed support pole (3) is on the upper end surface of removal mounting panel (1), four corners of removing mounting panel (1) bottom surface are provided with one universal wheel (2) respectively, the welding of the one end of removing mounting panel (1) upper end surface has communication cable to accomodate support (18), communication cable accomodates support (18) and is the Y type, and communication cable accomodates support (18) and removal mounting panel (1) vertical distribution.
4. The mining intrinsically safe flameproof communication device according to claim 2, characterized in that: the intercom chip (23) is respectively connected with the loudspeaker (15) and the intercom switch (16), the intercom switch (16) is electrically connected with the microphone (17), and the connection cable of the intercom chip (23) and the loudspeaker (15) and the intercom switch (16) runs through the middle shaft position of the second sealing conduit (11).
5. The mining intrinsically safe flameproof communication device according to claim 4, characterized in that: loudspeaker (15) and talkback switch (16) are fixed mounting respectively in the inside of intercom microphone shell body (14), and talkback switch (16) fixed mounting is in the side position department of intercom microphone shell body (14), be provided with the through-hole on the surface of intercom microphone shell body (14), and the position of through-hole corresponds with the position of loudspeaker (15) and microphone (17) respectively.
6. The mining intrinsically safe flameproof communication device according to claim 5, characterized in that: the intercom microphone shell body (14) is buckled in the intercom microphone placing seat (13), and a protective cap (12) is arranged above the intercom microphone placing seat (13).
7. The mining intrinsically safe flameproof communication device according to claim 2, characterized in that: the safety type communication cable connection box is characterized in that an intrinsic safety type communication cable connection box (9) is fixedly mounted at one end of the first sealing guide pipe (10), the intrinsic safety type communication cable connection box (9) is electrically connected with an interphone chip (23), and a connecting cable of the intrinsic safety type communication cable connection box (9) and the interphone chip (23) penetrates through the middle shaft position of the first sealing guide pipe (10).
8. The mining intrinsically safe flameproof communication device according to claim 1, characterized in that: the anti-explosion vacuum box is characterized in that a through hole is formed in the outer surface of one side of the second anti-explosion box body (6), a vacuum exhaust pipe (7) is fixedly connected to one end of the through hole, a control valve is arranged at the middle position of the vacuum exhaust pipe (7), and a plurality of reinforcing rib plates (20) are welded to the inner wall of the second anti-explosion box body (6).
9. The mining intrinsically safe flameproof communication device according to claim 2, characterized in that: the explosion-proof box is characterized in that a through hole is formed in the outer surface of the upper end of the first explosion-proof box body (4), a cooling liquid inlet pipe (8) is fixedly connected to one end of the through hole, and a control valve is arranged in the middle of the cooling liquid inlet pipe (8).
10. The mining intrinsically safe flameproof communication device according to claim 2, characterized in that: one ends of the first sealing guide pipe (10) and the second sealing guide pipe (11) are both arranged to be collet chuck structures, rubber blocks are arranged inside the collet chuck structures, and adjusting nuts are arranged on the outer surfaces of one ends of the first sealing guide pipe (10) and the second sealing guide pipe (11) and are in threaded connection with the outer surfaces of the collet chuck structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010125292.7A CN111314798A (en) | 2020-02-27 | 2020-02-27 | Mining intrinsically safe explosion-proof communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010125292.7A CN111314798A (en) | 2020-02-27 | 2020-02-27 | Mining intrinsically safe explosion-proof communication device |
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| Publication Number | Publication Date |
|---|---|
| CN111314798A true CN111314798A (en) | 2020-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010125292.7A Pending CN111314798A (en) | 2020-02-27 | 2020-02-27 | Mining intrinsically safe explosion-proof communication device |
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| CN (1) | CN111314798A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113286473A (en) * | 2021-05-19 | 2021-08-20 | 徐州中安防爆电器制造有限公司 | High-safety explosion-proof mining control box |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207399016U (en) * | 2017-10-11 | 2018-05-22 | 四川煤矿安全监察局安全技术中心 | Mining explosion-proof frequency converter box |
| CN108521751A (en) * | 2018-05-22 | 2018-09-11 | 国网甘肃省电力公司经济技术研究院 | A kind of communication cabinet of rapid cooling |
| CN208522322U (en) * | 2018-07-10 | 2019-02-19 | 常州信息职业技术学院 | A kind of explosion-proof electronic communication power-on box |
| CN110636733A (en) * | 2019-10-31 | 2019-12-31 | 徐州筑之邦工程机械有限公司 | High-stability semi-vacuum mining centralized control communication host |
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2020
- 2020-02-27 CN CN202010125292.7A patent/CN111314798A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207399016U (en) * | 2017-10-11 | 2018-05-22 | 四川煤矿安全监察局安全技术中心 | Mining explosion-proof frequency converter box |
| CN108521751A (en) * | 2018-05-22 | 2018-09-11 | 国网甘肃省电力公司经济技术研究院 | A kind of communication cabinet of rapid cooling |
| CN208522322U (en) * | 2018-07-10 | 2019-02-19 | 常州信息职业技术学院 | A kind of explosion-proof electronic communication power-on box |
| CN110636733A (en) * | 2019-10-31 | 2019-12-31 | 徐州筑之邦工程机械有限公司 | High-stability semi-vacuum mining centralized control communication host |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113286473A (en) * | 2021-05-19 | 2021-08-20 | 徐州中安防爆电器制造有限公司 | High-safety explosion-proof mining control box |
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Application publication date: 20200619 |
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| RJ01 | Rejection of invention patent application after publication |