CN216311250U - Explosion-proof liquid crystal multimedia player - Google Patents
Explosion-proof liquid crystal multimedia player Download PDFInfo
- Publication number
- CN216311250U CN216311250U CN202122826875.5U CN202122826875U CN216311250U CN 216311250 U CN216311250 U CN 216311250U CN 202122826875 U CN202122826875 U CN 202122826875U CN 216311250 U CN216311250 U CN 216311250U
- Authority
- CN
- China
- Prior art keywords
- explosion
- proof
- box
- liquid crystal
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Liquid Crystal (AREA)
- Casings For Electric Apparatus (AREA)
Abstract
The utility model belongs to the technical field of explosion-proof electronic equipment, and relates to an explosion-proof liquid crystal multimedia player. The explosion-proof multimedia player adopts a modular explosion-proof design method and adopts different explosion-proof methods to carry out explosion-proof protection respectively; the high-definition LED liquid crystal display module is designed in a nA type explosion-proof mode, the power panel and the main board are placed in a d type explosion-proof box for explosion-proof, parts of each modular explosion-proof design are connected through Ex elements according to explosion-proof wiring requirements to form an explosion-proof system, the explosion-proof system is installed in a module frame of a minimum combination, and a left side plate, a right side plate and a bottom plate are matched to form an explosion-proof multimedia player with double-sided display. The utility model discloses an explosion-proof multimedia player satisfies the flame proof requirement and has light-dutyization, simple in design, low cost's practical characteristics simultaneously, applicable in the multiple size have the two-sided liquid crystal display's that the flame proof requires playback devices, have better application prospect.
Description
Technical Field
The utility model belongs to the technical field of explosion-proof electronic equipment, and relates to an explosion-proof liquid crystal multimedia player.
Background
In the explosive environment of coal mines, petrochemical industry, gas stations, natural gas mining, drilling platforms, military industry, mines, metal polishing workshops with explosive hazards and the like, the environment using electrical equipment must meet the general requirements of GB3836.1 (part 1 equipment general requirements of the explosive environment), and can be produced after an appointed detection mechanism obtains an explosion-proof qualification certificate. The explosion-proof liquid crystal multimedia player on the market at present adopts explosion-proof sealed design mostly, and weight and volume are all great, and display screen is less, and is with high costs, and luminance and contrast are low, receive very big restriction on the use under outdoor or the highlight, and the broadcast effect is not good.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: an explosion-proof liquid crystal multimedia player is provided.
The technical scheme is as follows:
in a first aspect, an explosion-proof liquid crystal multimedia player includes: two nA explosion-proof display units 1, d-type explosion-proof box parts 2, d-type explosion-proof loudspeakers 3, explosion-proof control buttons 4, an explosion-proof junction box 5, two explosion-proof junction boxes 6 and a module frame body 10, wherein the two explosion-proof junction boxes 6 are respectively fixed on back plate structural members of the two nA explosion-proof display units 1, the two nA explosion-proof display units 1 are respectively fixed on the front surface and the back surface of the module frame body 10, the d-type explosion-proof box parts 2 are fixed in the module frame body 10, the d-type explosion-proof loudspeakers 3 are arranged above the module frame body 10, the explosion-proof control buttons 4 and the explosion-proof junction boxes 5 are respectively fixed on transverse braces on the left side surface and the right side surface of the module frame body 10, the explosion-proof junction box 5 is an explosion-proof four-way junction box, one terminal of the explosion-proof four-way junction box is connected with the d-type explosion-proof box parts 2, one terminal is connected with an external power supply, one terminal is connected with the explosion-proof control button 4, the other terminal is provided with an explosion-proof plug, the output end of the d-type explosion-proof box component 2 is connected with the input end of an explosion-proof junction box 6, two output terminals of the first explosion-proof junction box 6 are respectively connected with one nA explosion-proof display unit 1 and the d-type explosion-proof loudspeaker 3, one output terminal of the second explosion-proof junction box 6 is connected with the other nA explosion-proof display unit 1, and the other output terminal is provided with an explosion-proof plug.
Further, still include: and the three thin steel plate stamping parts are respectively arranged above and on the left side surface and the right side surface of the explosion-proof liquid crystal multimedia player and are used for realizing the packaging of the explosion-proof liquid crystal multimedia player.
Further, the nA explosion-proof display unit 1 includes a frame 101, a sealing rubber pad 102, a polycarbonate plate 103, a liquid crystal display module 104, a sealing rubber plate 105, a heat dissipation back plate 106, a lower sealing box 107, a signal conversion plate 108, an upper sealing box 109, a cable sealing clamping device 110, and a support seat 111, wherein the sealing rubber pad 102, the polycarbonate plate 103, the liquid crystal display module 104, the sealing rubber plate 105, and the heat dissipation back plate 106 are sequentially disposed in the frame 101, the lower sealing box 107, the signal conversion plate 108, and the upper sealing box 109 are disposed on the heat dissipation back plate 106, and the cable sealing clamping device 110 is disposed on the upper sealing box 109.
In a second aspect, an explosion-proof liquid crystal multimedia player includes: two nA explosion-proof display units 1, two d-type explosion-proof box parts 2, two d-type explosion-proof loudspeakers 3, an explosion-proof control button 4, an explosion-proof junction box 5, two explosion-proof junction boxes 6 and a module frame body 10, wherein the two explosion-proof junction boxes 6 are respectively fixed on back plate structural members of the two nA explosion-proof display units 1, the two nA explosion-proof display units 1 are respectively fixed on the front and back surfaces of the module frame body 10, the two d-type explosion-proof box parts 2 are respectively fixed in the module frame body 10, the d-type explosion-proof loudspeakers 3 are arranged above the module frame body 10, the explosion-proof control button 4 and the explosion-proof junction box 5 are respectively fixed on transverse braces on the left and right side surfaces of the module frame body 10, the explosion-proof junction box 5 is a four-way explosion-proof junction box, wherein two terminals are respectively connected with the two d-type explosion-proof box parts 2, one terminal is connected with an external power supply, and one terminal is connected with the explosion-proof control button 4, the output ends of the two d-type explosion-proof box parts 2 are respectively connected with the input end of an explosion-proof junction box 6, two output terminals of the first explosion-proof junction box 6 are respectively connected with one nA explosion-proof display unit 1 and the d-type explosion-proof loudspeaker 3, one output terminal of the second explosion-proof junction box 6 is connected with the other nA explosion-proof display unit 1, and the other output terminal is provided with an explosion-proof plug.
Further, still include: and the three thin steel plate stamping parts are respectively arranged above and on the left side surface and the right side surface of the explosion-proof liquid crystal multimedia player and are used for realizing the packaging of the explosion-proof liquid crystal multimedia player.
Further, the nA explosion-proof display unit 1 includes a frame 101, a sealing rubber pad 102, a polycarbonate plate 103, a liquid crystal display module 104, a sealing rubber plate 105, a heat dissipation back plate 106, a lower sealing box 107, a signal conversion plate 108, an upper sealing box 109, a cable sealing clamping device 110, and a support seat 111, wherein the sealing rubber pad 102, the polycarbonate plate 103, the liquid crystal display module 104, the sealing rubber plate 105, and the heat dissipation back plate 106 are sequentially disposed in the frame 101, the lower sealing box 107, the signal conversion plate 108, and the upper sealing box 109 are disposed on the heat dissipation back plate 106, and the cable sealing clamping device 110 is disposed on the upper sealing box 109.
Further, the frame 101 is formed by bending and welding an extruded profile.
Further, the polycarbonate plate 103 is 5mm thick.
Further, the lower sealing box 107 and the upper sealing box 109 form a cavity, silicon rubber is filled in the cavity in a potting mode, and the thickness of the filling and covering is not less than 2mm relative to the thickness of the plug and the electronic device.
Further, the mounting bracket 207 in the d-shaped explosion-proof box part 2 adopts an aluminum alloy plate stamping and cutting L-shaped fin structure.
Has the advantages that:
the method comprises the following steps of respectively carrying out explosion-proof protection by different explosion-proof methods by utilizing a power panel which is widely used in the market and converts 220V alternating current input into 24V &12V direct current output and a display main board which is used for playing control of video images and has an information issuing function; the high-definition LED liquid crystal display module adopts nA type explosion-proof design, a power panel and a main board are placed in a d type explosion-proof box for explosion-proof, parts with modularized explosion-proof design are connected through Ex elements according to explosion-proof wiring requirements to construct an explosion-proof system, the explosion-proof system is installed in a minimally combined module frame, and a left side plate, a right side plate and a bottom plate are matched to form an explosion-proof multimedia player with double-sided display; the utility model discloses an explosion-proof multimedia player satisfies the flame proof requirement and has light-dutyization, simple in design, low cost's practical characteristics simultaneously, applicable in the multiple size have the two-sided liquid crystal display's that the flame proof requires playback devices, have better application prospect.
Drawings
FIG. 1 is a schematic diagram of an explosion-proof liquid crystal multimedia player;
FIG. 2 is a wiring diagram of an explosion-proof liquid crystal multimedia player explosion-proof device;
FIG. 3 is a wiring diagram of an explosion-proof device of the explosion-proof liquid crystal multimedia player;
fig. 4 is a schematic diagram of a nA explosion-proof display unit;
FIG. 5 is a d-type flameproof case member;
FIG. 6 is a schematic view of a module frame;
FIG. 7 is a schematic diagram of a frame structure and a cross-section;
FIG. 8 shows the upper and bottom shells of the d-type flameproof box;
the system comprises an nA explosion-proof display unit 1, a d-type explosion-proof box part 2, a d-type explosion-proof loudspeaker 3, an explosion-proof control button 4, an explosion-proof junction box 5, an explosion-proof junction box 6, a left side plate 7, a right side plate 8, a top plate 9 and a module frame 10, wherein the nA explosion-proof display unit is connected with the d-type explosion-proof box part 2 through a connecting wire; the device comprises a frame 101, a sealing rubber gasket 102, a polycarbonate plate 103, a display module 104, a sealing rubber plate 105, a heat dissipation back plate 106, a sealing lower box 107, a signal conversion plate 108, a sealing upper box 109, a cable sealing clamping device 110 and a supporting seat 111; the anti-explosion wireless signal testing device comprises an upper shell 201, a bottom shell 202, a pressing plate 203, a light-transmitting plate 204, a sealing gasket 205, a bottom bracket 206, a mounting bracket 207, a main control board 208, a constant current board 209, a power supply board 210, a cable clamping sealing connector 211, an anti-explosion wifi antenna 212 and an IR signal board 213; a conductive seal groove 2001; the explosion-proof box comprises a bearing frame 1001, a mounting plate 1002, an explosion-proof box mounting frame 1003, a frame body bottom plate 1004, a reinforcing channel 1005, transverse pull section steel 1006, a transverse brace 1007, a horn mounting block 1008, a lifting handle 1009, a support 1010 and a supporting angle 1011.
Detailed Description
The utility model provides a method for building an explosion-proof system in a modularized mode with low cost. The display unit is an explosion-proof high-brightness LED backlight liquid crystal display module with nA (no-spark device), a constant current board of the display unit, a power board and a main board of the whole media playing player are reasonably arranged in an explosion-proof box with d-type explosion prevention, cables in the display module and the explosion-proof box are connected in a shunting mode through a connection box, and the whole system wiring meets the explosion-proof requirement. The nA type explosion-proof display unit adopts a high-definition liquid crystal display module (1000lm) with mature LED backlight in the market as a core, secondary processing is carried out, the whole liquid crystal display module is wrapped by integrally bent parts such as an aluminum alloy section, a transparent part, a heat dissipation back plate and a sealing gasket, gaps are filled with heat conducting glue, the protection grade and 4J impact requirements of IP54 are met, and the purpose of explosion suppression under the normal use condition in structure is achieved; the heat of the LED backlight group and the screen display is transferred to the aluminum alloy heat dissipation back plate through the graphene heat conduction belt and the flexible heat conduction pad, and the requirement that the highest temperature is not more than T5 is met. The d-type explosion-proof box is cast by aluminum alloy die castings, and meets the specific requirements of GB/T3836.2 equipment protected by an explosion-proof shell d. The constant current board, the power supply board and the main board are supported and installed through an aluminum alloy support and a stud, and the explosion-proof box is provided with a WIFI component interface and is used for installing WIFI components and realizing 4G/5G communication of playing signals; the IR signal controller transmits signals to the IR receiving board through the transparent observation window, and controls the brightness, the contrast ratio, the off-line setting of the issuing system and other functions of the display unit; 2 explosion-proof cable interfaces are provided, but not limited to this number, for the transmission of power and signals. The playing system selects an explosion-proof horn with explosion-proof quality for audio playing, selects an Ex element as a clamping and sealing device of a cable, and adds an explosion-proof control button for emergently cutting off a power supply according to the requirements of GB/T3836.15 electrical appliance device design, type selection and installation; in order to facilitate assembly and transportation, modular assembly is adopted, and the nA explosion-proof liquid crystal display screen, the d-type explosion-proof box component and the explosion-proof loudspeaker are crosslinked through an explosion-proof junction box; the d-type explosion-proof box part, the explosion-proof control button and the explosion-proof junction box are arranged in the mounting box with the minimum design; the components, the top plate, the left side plate and the right side plate form an explosion-proof liquid crystal multimedia player.
As shown in fig. 1-3, the nA explosion-proof display unit 1 is a display assembly that meets the nA type (sparkless type) explosion-proof requirement, and provides 1000lm high-brightness and high-definition play for the system. The d-type explosion-proof box component 2 meets d-type explosion-proof requirements, provides explosion-proof protection for a circuit board of the system, provides a perspective window for infrared control, and provides a WiFi interface for 4G/5G. The d-type explosion-proof loudspeaker 3 meets the d-type explosion-proof requirement and provides audio output for the system. The explosion-proof control button 4 is an Ex element and can cut off the power supply of the system in an emergency. The explosion-proof junction box 5 is an Ex element, and provides a reliable shunt space for each power input line. The explosion-proof junction box 6 is an Ex element and provides an explosion-proof wiring switching space for an explosion-proof horn, a constant current board and video signals. The left side plate 7 is a sheet steel stamping part, which provides protection and ventilation for the system and is designed to be dustproof. The right side plate 8 is a sheet steel stamping part which provides protection and ventilation for the system and carries out dust-proof treatment. The top plate 9 is a sheet steel stamping that provides protection and ventilation for the system and is treated for dust protection. The module frame 10 is screwed by using sectional materials.
As shown in fig. 4, the frame 101 is formed by bending and welding an extruded profile to provide structural support for the display module. Sealing rubber pad 102 is formed by die cutting a rubber plate, and seals the assembly gap between frame 101 and polycarbonate plate 103. Polycarbonate plate 103(5mm thickness PC) transmits light and protects the display screen from 4J impact. The lcd module 104 is an LED lcd module with a brightness of 1000lm, and outputs a high brightness image and a video image for the system. The sealing rubber plate 105 is formed by die cutting of a rubber plate, and seals the assembly gap of the frame 101, the display module 104 and the heat dissipation back plate 106. Heat dissipation backplate 106 adopts 2mm aluminium alloy plate stamping forming, provides 7J impact protection and provides the heat dissipation passageway for display module assembly 104. The lower sealed box 107 is formed by stamping 1mm aluminum alloy plates, and provides sealing protection and support for the signal conversion plate 108. The signal conversion board 108 provides signal conversion. The upper sealing box 109 is an aluminum alloy die casting, provides sealing protection for the signal conversion plate 108, and is provided with a cable sealing and clamping device. The cable sealing clamp 110 is an Ex element that provides clamping and sealing for the cable. The supporting seat 111 is milled to provide supporting and limiting for component installation.
As shown in fig. 5 and 8, the upper case 201 is a die-cast aluminum component and forms a basic d-type explosion-proof cavity with the bottom case 202, so as to provide explosion-proof protection for the internal circuit board; mounting hole sites are provided for other seals. The bottom shell 202 is a die-cast aluminum part and forms a basic d-type explosion-proof cavity with the upper shell 201, and explosion-proof protection is provided for the internal circuit board. The pressing plate 203 is a die-cast aluminum member, and the pressing plate 203, the upper shell 201 and the sealing gasket 205 are combined to press the light-transmitting plate 204 and seal the window. The light-transmitting plate 204 is a 5mm polycarbonate plate providing a see-through window for the internal infrared interface. The sealing gasket 205 is cut by a rubber plate, and seals the assembly gap of the upper shell 201, the light-transmitting plate 204 and the pressing plate 203. Bottom bracket 206 is an aluminum alloy sheet metal part that provides the installation switching for circuit board and drain pan 202. The mounting bracket 207 is an aluminum alloy sheet metal part, and provides mounting, transferring and heat dissipation for the circuit board. The main control board 208, the control module and the system information distribution. The constant current board 209 is an LED constant current board of the display module 104, and provides 24V dc power for the display module 104. The power panel 210 provides current conversion and control for the entire system, converting 220V ac to 12V and 24V dc for the system. The cable clamp tight seal fitting 211 is an Ex element that provides a secure hold and seal for cables entering and exiting the flameproof box. The anti-explosion wifi antenna 212 provides 4G/5G wireless signal transmission for the system. IR signal board 213 provides infrared signal reception and conversion for system control.
As shown in fig. 6, the load-bearing frame 1001 is formed by bending an L-shaped material such as a cold-rolled steel plate, and the frame is a main load-bearing member. The mounting plate 1002 is bent from a steel plate and serves as a mounting support for the control button. The explosion-proof box mounting frame 1003 is formed by bending cold-rolled equilateral L-shaped materials and serves as a mounting support for the explosion-proof control button 4. The frame bottom plate 1004 is bent by a steel plate and serves as a stressed connection carrier of the whole module frame. The reinforcing channel 1005 is formed by bending a cold-rolled steel plate and is used for reinforcing the strength of the bottom plate. The transverse pull section steel 1006 adopts a cold-rolled equilateral L-shaped section as a connecting bearing part for fixing the bearing frame 1001. The cross brace 1007 is made of cold rolled thin steel plate and used for improving the local rigidity of the frame body and bearing an Ex device. The horn mounting block 1008 is bent by a cold plate steel plate and serves as an explosion-proof horn mounting support piece. The handle 1009 is bent by round steel to be used as a whole machine carrying handle. The support 1010 is formed by bending and milling round steel, and provides mounting support for the explosion-proof control button. The supporting angle 1011 is pressed by environment-friendly rubber, so that the whole machine is supported.
Example (b):
2 nA explosion-proof display units 1 are adopted as video image players of the system, and the 2 players are arranged on two sides of a module frame 10 in a back-to-back mode and form a certain angle (the angle is determined according to the optimal viewing angle required by different installation heights of the players, and can be adjusted to be 0-25 degrees). The cylinder of the nA type explosion-proof display unit 1 is sleeved on the supporting pieces at the two bottoms of the module frame 10, the tops of the nA type explosion-proof display unit 1 are respectively connected through two groups of hinge pieces which can be turned and adjusted, one end of the nA type explosion-proof display unit 1 is connected with the original fixed supporting column of the nA type explosion-proof display unit 1, and the other end of the nA type explosion-proof display unit is connected with the bearing frame of the module frame 10 and is connected with the bearing frame of the module frame 10 through screws. The d-type flameproof case member 2 houses the circuit board of the system therein, and is mounted on the flameproof case mounting frame 1003 of the module frame 10 by screws. d type explosion-proof loudspeaker 3 self passes through the mounting screw to be installed on the loudspeaker mounting bracket of module frame 10, and all the other explosion-proof control button 4, explosion-proof terminal box 5, left side board 7, right side board 8, roof 9 are fixed on module frame 10 through different screws respectively. For the convenience of assembly, the explosion-proof junction box 6 is screwed to the heat dissipation back plate 106 of the nA type explosion-proof display unit 1. The required number of d-type explosion-proof box parts 2 needs to be configured according to the space required by the circuit board. In the utility model, a liquid crystal display screen on the market is matched with a mature power panel and a mature mainboard, 2 nA type explosion-proof display units 1 are respectively controlled by 2 sets of circuit boards to simplify the development cost, and the explosion-proof wiring relation of the whole system is shown in figure 2. Fig. 3 shows the system explosion-proof wiring relationship of a single circuit board for controlling 2 nA type explosion-proof display units 1.
The implementation of each explosion-proof whole piece in the system is described in detail below;
the composition of the nA explosion-proof display unit 1 is shown in FIG. 4; the frame 101, the polycarbonate plate 103 and the heat dissipation back plate 106 form a large cavity after being fastened by screws, the purchased finished liquid crystal display module 104 is subjected to explosion-proof protection, and gaps of an assembly body are filled with deformation generated by the sealing rubber gasket 102(1mm) and the sealing rubber plate 105(2mm) under the screw compression respectively. The gap between the frame 101 and the liquid crystal display module 104 is filled with heat-conducting silica gel, and the heat of the frame of the liquid crystal display module 104 is conducted to the frame 101 in a sealed mode, so that heat dissipation is facilitated, and the surface temperature is reduced. Frame 101 adopts 6063 aluminum alloy extruded section bar four corners bending welding shaping that heat conductivility is good, extrudees the section bar and resembles L (see figure 7), extrudees through the section bar, can improve frame intensity, reduction in weight. The extruded section bar is bent by the method shown in the figure, the narrow width and the enough strength can be ensured, the cost is low, the appearance is attractive, and the fastening mounting holes are processed after the bent frame is welded and corrected, so that the assembly consistency is ensured. The extruded section adopts a mesopore mode, and can be lightened to the maximum extent on the premise of ensuring the strength.
The polycarbonate plate 103 is cut by adopting a polycarbonate plate with the thickness of 5mm, so that the 4J impact is not broken and has no crack; satisfies the condition that the surface resistance is not more than 109The ohmic explosion-proof standard; meets 26.10 requirements of a photoaging test in GB/T3836.1 (UL-746C-f 1 level is also available); the liquid crystal display module 104 directly adopts a 1000Lm high-brightness liquid crystal display screen which is mainstream in the market, so that the display effect is not influenced under the direct irradiation of sunlight, and meanwhile, the brightness can be adjusted through software or on site, so that a viewer is protected, and electric energy is saved; a constant current plate (providing 24V direct current for the module) of the display module is disassembled and placed into the d-type explosion-proof box component 2; a heat conducting gasket with the thickness of 2mm is attached to the heat dissipation area of the back LED, so that heat at the heat dissipation area is conveniently transferred to the heat dissipation back plate 106 through the heat conducting gasket after assembly, and the working heat of the liquid crystal display module 104 is dissipated through the heat dissipation back plate 106. A signal conversion plate 108 of the liquid crystal display module 104 is arranged in a sealing box consisting of a lower sealing box 107 and an upper sealing box 109, and a screen wire plug and a 24V direct current cable of the liquid crystal display module 104 are led into a cavity through a cable sealing and clamping device 110 and are respectively butted with the signal conversion plate 108 and a power supply input interface; the cable sealing and clamping device 110 has a threaded joint surface on the flameproof joint surface of the sealing upper box 109, the length of the joint surface is greater than 10mm, and the number of threads is greater than 5, so that the flameproof requirement is met; silicon rubber is filled into the cavity, so that the butt plug and the signal conversion board 108 are completely coated by Dow Corning 184 silicon rubber, and the coating thickness is not less than 2 mm; the lower sealing box 107 and the upper sealing box 108 are fixed to the chassis of the lcd module 104 by screws. The joint surface of the heat dissipation back plate 106 and the lower sealing box 107 adopts a convex-concave lap joint protection form to ensure that the protection grade of the sealing shell is greater than IP 54; the gap of the assembly is filled with a potting compound,and ensuring that the protection grade of the whole nA explosion-proof display unit 1 is greater than IP 54. According to the complexity of the structure, the lower sealing box 107 is formed by welding after being stamped by a thin steel plate, and the upper sealing box 108 is formed by die-casting, milling and machining, so that the matching precision of a joint surface is ensured; the locking seat 111 is screwed to the back heat sink 106, which is a stainless steel component that provides support and restraint for the entire assembly.
Through the implementation method, the whole nA explosion-proof liquid crystal display unit 1 meets the requirements of a liquid crystal display player, and also meets the requirements of 4J impact on a display surface, no liquid leakage and no crack of the nA explosion-proof display unit 1 after 7J impact on the back, and the explosion-proof requirement that the protection grade of the whole part is greater than IP 54; the whole nA explosion-proof display unit 1 can be applied to the explosion-proof protection of commercialized liquid crystal display modules with various sizes, and meets the relevant explosion-proof requirements of GB/T3836.1 general requirements for equipment in part 1 of explosive environment and GB/T3836.8 equipment protected by n type in part 8 of explosive environment;
the specific implementation of the d-type explosion-proof box component 2 is as shown in fig. 3, a bottom shell 202, a pressing plate 203, a light-transmitting plate 204 and a sealing gasket 205 are fastened on an upper shell 201 through screws meeting the requirement that the mechanical grade of GB/T70.1 is greater than 8.8 grade to form an explosion-proof cavity, the joint surface of parts is an explosion-proof joint surface I, and the width of the joint surface meets the requirements of the minimum explosion-proof joint surface width, the minimum assembly gap, the roughness and the flatness of the explosion-proof cavity in GB 3836.2; the requirement of no leakage deformation under the water pressure of 1.5MPa is met. A conductive sealing groove 2001 is designed on the upper shell 201, the interior of the upper shell is filled with a conductive rubber strip, and a matched joint surface can play a role in waterproof and electromagnetic sealing; the convex ribs designed on the edge of the joint surface are mutually matched, so that the effective width of the joint surface is increased, and the sealing and electromagnetic shielding effects are achieved. The upper shell and the bottom shell are provided with threaded blind holes meeting the explosion-proof requirement and used for assembling and assembling other parts. The upper shell 201, the bottom shell 202 and the pressing plate 203 are formed by aluminum alloy die-casting and then finish machining and combining. The light-transmitting plate 204 is made of a 5mm polycarbonate plate, and meets the same explosion-proof requirement as the polycarbonate plate 103.
The base support 206 is formed by bending an aluminum alloy plate and riveting a mounting stud, is used for supporting the circuit board and is fixed on the bottom shell 202 through a screw, and the main control board 208 is fastened on the stud of the base support 206 through a screw; the mounting bracket 207 is made of 6063 aluminum alloy plate with excellent heat conductivity by stamping and riveting a stud; as shown, the constant current plate 209 is fixed to the rivet stud below the mounting bracket 207 by a screw; the power panel 210 is fixed on the riveting stud above the mounting bracket 207 by a screw; the IR signal plate 213 is fixed on the small sheet bent at the side surface of the mounting bracket 207 by structural adhesive; the mounting bracket 207 is punched and folded with L-shaped fins of different heights below and abuts against the high-power heat dissipation devices of the constant current plate 209 and the main control plate 208, and the joint surface of the constant current plate 209 and the main control plate 208 is coated with heat-conducting silicone grease for heat conduction, so that the heat energy of the devices is ensured to be rapidly transferred, and the devices are prevented from being overheated; after the selected power panel 210 is installed, the self radiator of the power panel cannot contact with the top surface of the inner cavity of the upper shell 201, a heat conducting part needs to be added to conduct a large amount of heat gathered by the power radiator to the upper shell 201, the heat conducting part added at the output end radiator of the installed power panel 210 needs to be tightly attached to the inner wall of the upper shell 201, the heat conducting part added at the input end radiator needs to keep a discharging distance exceeding a 6mm gap with the inner wall of the upper shell 201, the heat conduction of the gap is realized through an insulating heat conducting gasket, and the thickness of the insulating heat conducting gasket is larger than the reserved discharging distance; the distances between the main control board 208, the constant current board 209, the power supply board 210, the base support 206 and the mounting support 207 and the inner wall of the d-type explosion-proof cavity are all more than 10mm, so that the explosion-proof requirements of minimum electrical appliance clearance and creepage distance are met; the base bracket 206, the mounting bracket 207 and the added heat conducting pieces are subjected to insulation treatment; all of the joint cables are fixed to the mounting bracket 207 with a binding tape.
The anti-explosion wifi antenna 212 component is connected with the upper shell 201 through threads by adopting an m (cast) type anti-explosion mode and an anti-explosion thread combination surface, the thread matching precision is 6g/6H, the thread connection length is greater than 10mm, the number of connecting buckles is greater than 5, and the anti-explosion requirement is met;
through the embodiment, the d-type explosion-proof box component 2 can meet the requirements of explosion suppression and maximum surface temperature, and meets the relevant explosion-proof requirements of GB/T3836.1 general requirements of equipment of part 1 in explosive environment, GB/T3836.2 equipment protected by d type in part 2 in explosive environment, and GB/T3836.2 equipment protected by m type in part 9 in explosive environment;
the d-type explosion-proof horn 3 adopts a d-type explosion-proof horn (the patent number is ZL 201921568849. x) or is allowed by space, and Ex goods shelves with explosion-proof property can be adopted; the horn fixing block 1008 is fixed on the module frame 10 through screws and fastened in a screwed manner;
the explosion-proof control button 4 and the explosion-proof junction box 5 are both commercialized Ex elements and are fixedly arranged on the module frame body 10 through screws, wherein the explosion-proof control button 4 is used for emergently cutting off a system power supply to prevent accident diffusion, the explosion-proof junction box 5 is used for connecting and distributing a 220V input power supply, and the explosion-proof control button 4 and the d-type explosion-proof box component 2 ensure that a power line is reliably connected and explosion-proof; the Ex elements are selected to meet the mandatory requirements of GB3836.15 design, type selection and installation of part 15 electrical devices in explosive environment;
the explosion-proof junction box 6 is used for meeting the requirement that the d-type explosion-proof box component 2 is branched to the nA-type explosion-proof display unit 1 and the d-type explosion-proof loudspeaker 3, meeting the wiring requirement of sub-module assembly, and improving the assembly manufacturability and the production efficiency; selecting an Ex element to meet the mandatory requirement of GB3836.1 general requirement for equipment of part 1 in explosive environment;
the left side plate 7, the right side plate 8 and the top plate 9 are all formed by stamping and bending 0.5mm cold-rolled steel sheets and are fixed on corresponding positions of the frame body module 10 through screws; a louver vent hole and a strip vent hole are punched in the left side plate 7 and the right side plate 8, a vent hole with the diameter of 2mm is formed in the center of the bottom of the left side plate 7, the louver vent hole is used for ventilation and strength improvement, the strip vent hole is used for ventilation convection of the nA display module, and the bottom vent hole is used for ventilation and wave transmission, so that the explosion-proof wifi antenna component 212 can conveniently receive 4G/5G signals; PVC dustproof nets are stuck on the inner walls of the left side plate 7 and the right side plate 8 corresponding to the ventilation holes; the lower part of the left side plate 7 is provided with two large holes, one hole is used for installing an explosion-proof control button 4, and the other hole is used for installing an explosion-proof pipe for protecting an input cable; the lower part of the right side plate 8 is provided with a hole for installing an explosion-proof pipe for protecting an input cable; the explosion-proof tube for installing and protecting the input cable is perforated and connected with the blocking plate by spot welding, and the blocking plate is required to be detached when the explosion-proof tube is installed on the side. 3 holes formed in the middle of the top plate 9 are respectively bonded with a PVC dustproof net on the inner wall, so that the ventilation of the case can be increased except for dust prevention, and convex ribs are stamped on the two sides of the case to improve the structural strength;
the module frame 10 is implemented as shown in fig. 6; the bearing frame 1001 is formed by bending a 25x3 cold bending equilateral right-angle section bar into a frame body, is fixed on the frame body bottom plate 1004 through a screw, and is connected and fixed through a reinforcing channel steel 1006 to increase the rigidity of the frame body bottom plate 1004; the mounting plate 1002 is bent by a 1.5mm aluminum plate, is used for fixedly mounting an explosion-proof control button, bears the pressing force of the button, and is fixed on the bearing frame through a screw; the explosion-proof box mounting frame 1003 is formed by bending and welding 25 multiplied by 15 multiplied by 2 cold-bending unequal angle steel into a frame, is used for mounting the explosion-proof box component 3 and is fixed on the frame body bottom plate 1004 and the cross brace 1007 through screws; the frame body bottom plate 1004 is formed by bending the periphery of a 2mm cold-rolled steel plate to enhance the rigidity, 3 square holes are formed in the middle of the frame body bottom plate to reduce the weight, meanwhile, the reinforcing channel steel 1005 is used for reinforcing the rigidity weakened after the hole is formed, and the bearing frame 1001 and the explosion-proof box mounting frame 1003 are connected through screws; threaded holes are formed in the peripheral folded edge and used for mounting a left side plate 7 and a right side plate 8; cutting the reinforcing channel steel 1005 and the transverse drawing section 1006 by adopting cold-bending equal-side angle steel; the cross brace 1007 is cut by a cold rolled steel strip; both are fixed on the bearing frame 1001 through screws for enhancing the rigidity and strength of the frame module 10, and threaded holes are designed on the two parts for fixing the Ex element and the top plate 9; the horn mounting block 1008 is bent by adopting a cold-rolled steel bar and is respectively connected with the bearing frame 1001 and the d-type explosion-proof horn 3 through screws; the handle 1009 is bent by round steel to be U-shaped, is provided with a thread at the head, and is fixed on the transverse pulling section bar 1006 through a nut for bearing the weight of the system, so that the carrying is convenient; the bearing part 1010 is bent into an L shape by adopting round steel, a limiting platform and threads are milled at one section, the limiting platform and the threads are matched with a limiting hole of the bearing frame 1001 and a cylindrical mounting block of the nA type display module, the assembly dead weight and the limiting of the nA type display module are borne, and the bearing part is fixed on the bearing frame 1001 through nuts; the supporting angle 1011 is pressed by environment-friendly rubber and is used for supporting the whole explosion-proof multimedia player, so that the carrying and the installation are convenient; the whole frame module 10 adopts a minimized design, and a system bearing body with enough rigidity and strength is formed by common cold-bending section bars and steel bars through screw connection, so that the system bearing body has the advantages of light weight, enough strength, low cost and convenient implementation, and meets the requirements of system performance and cost;
through the embodiment, the explosion-proof multimedia player system meets various technical indexes of GB3836 and meets the standard requirement.
According to the anti-explosion multimedia player, the modular anti-explosion design is adopted, the anti-explosion system is formed according to the wiring diagram shown in the figure 2 or the figure 3, compared with the integral d-type anti-explosion design, the implementation content of the anti-explosion multimedia player adopts different anti-explosion design schemes aiming at the anti-explosion requirements of different parts, the modular anti-explosion design and the assembly are carried out, the system connection is carried out according to the related requirements of GB3836, the anti-explosion design difficulty of the system is reduced, the modular design and the production assembly are realized, the manufacturability is improved, and the cost is greatly reduced.
The nA explosion-proof display unit 1 adopts a mature liquid crystal display module as the main work of nA explosion-proof protection, separates a constant current plate of the liquid crystal display module and puts the constant current plate into another explosion-proof cavity for protection, reduces the explosion-proof design difficulty of the whole liquid crystal display module, does not need to carry out special explosion-proof treatment on the existing constant current plate, and only needs to put a power panel, a mainboard and the like into the explosion-proof cavity, thereby reducing the design difficulty and the cost.
Adopt 6063 extruded profile to bend into the frame and be used for fixed liquid crystal display module assembly 104, under the condition that satisfies intensity, very big reduction part weight is favorable to liquid crystal display module assembly 104 heat conduction itself simultaneously to can obtain better outward appearance.
The nA explosion-proof display unit 1 adopts a polycarbonate plate 103 with the thickness of 5mm as a light-transmitting piece, has excellent light transmittance and impact toughness, and meets the explosion-proof requirements of no fracture and no crack under 4J energy impact; compared with explosion-proof glass, the polycarbonate plate is selected, parts are lighter and thinner, and purchasing cost is lower.
In the nA explosion-proof display unit 1, the signal conversion plate 8 is arranged in a cavity with the protection grade larger than IP54, the cavity consists of a lower sealed box 107 and an upper sealed box 109, silicone rubber 184 is filled and sealed in the cavity, and the thickness of filling and sealing coating is not less than 2mm for a plug and an electronic device. The method can meet the explosion-proof use requirement without redesigning the signal conversion plate 8, simplify the explosion-proof design, reduce the cost and shorten the period.
The mounting bracket 207 adopted by the d-type explosion-proof box component 2 adopts a 6063 aluminum alloy plate stamping and cutting L-shaped fin structure to abut against high-power heat dissipation devices of the main control plate 208 and the constant current plate 209, and studs are riveted and mounted on two sides, so that the heat dissipation and heat conduction structure is simplified, the assembly process requirement is simplified, and the cost is reduced.
The power panel 210 adopted by the d-type explosion-proof box component 2 adopts a method that a marketized power panel which can output 12V &24V direct current output is tightly attached to the radiating fins of the power panel and the inner wall of the cavity at a low-voltage conversion end by a heat conducting part to conduct heat, the distance between the radiating fins and the inner wall of the cavity at a high-voltage end is larger than 6mm, the heat of the radiating fins of the power panel is transferred to the inside of the cavity through an insulated flexible heat conducting pad, and the requirements of minimum creepage distance and minimum electric clearance are met; by adopting the method, the power panel does not need to be redesigned, the requirements of the highest surface temperature and the electrical safety are met, the explosion-proof requirement is met, the development cost is reduced, and the design period is shortened.
The d-type explosion-proof box component 2 is designed to be provided with a large perspective window, the circuit board and the projection component are arranged in the explosion-proof box component, and the projection light path completely penetrates through the light-transmitting piece 204 to meet the explosion-proof requirement of explosion-proof electrical appliances with projection display requirements.
The light-transmitting piece 204 in the d-type explosion-proof box component 2 adopts a 5mm polycarbonate plate to replace explosion-proof glass as the light-transmitting piece, can meet 4J impact and 1.5Mpa hydraulic pressure tests, and has good stability, lower purchasing cost, better processability and size consistency compared with the explosion-proof glass.
Frame module 10 is main load-bearing spare, and load-bearing frame 1001, explosion-proof box installing frame 1003 adopt cold rolling equilateral right angle section bar of bending to bend into the frame shape to connect through 1004 ~ 1007 and strengthen, simplify the design and alleviate structural weight, satisfy intensity and installation demand, very big reduction the cost.
The assembly relation that supporting seat 111 and support piece 1010 are constituteed satisfies the spacing demand of the installation of nA explosion-proof display unit 1, simple structure, safe and reliable, with low costs.
The utility model discloses an explosion-proof multimedia player with double-sided display, and belongs to the technical field of explosion-proof electronic equipment. The explosion-proof multimedia player adopts a modular explosion-proof design method, utilizes a power panel which is widely used in the market and is used for converting 220V alternating current input into 24V &12V direct current output and a display main board which is used for playing control of video images and has an information issuing function, and adopts different explosion-proof methods to respectively carry out explosion-proof protection; the high-definition LED liquid crystal display module adopts nA type explosion-proof design, a power panel and a main board are placed in a d type explosion-proof box for explosion-proof, parts with modularized explosion-proof design are connected through Ex elements according to explosion-proof wiring requirements to construct an explosion-proof system, the explosion-proof system is installed in a minimally combined module frame, and a left side plate, a right side plate and a bottom plate are matched to form an explosion-proof multimedia player with double-sided display; the utility model discloses an explosion-proof multimedia player satisfies the flame proof requirement and has light-dutyization, simple in design, low cost's practical characteristics simultaneously, applicable in the multiple size have the two-sided liquid crystal display's that the flame proof requires playback devices, have better application prospect.
Claims (10)
1. An explosion-proof liquid crystal multimedia player, comprising: two nA explosion-proof display units (1), a d-type explosion-proof box component (2), d-type explosion-proof loudspeakers (3), an explosion-proof control button (4), an explosion-proof junction box (5), two explosion-proof junction boxes (6) and a module frame body (10), wherein the two explosion-proof junction boxes (6) are respectively fixed on a back plate structural member of the two nA explosion-proof display units (1), the two nA explosion-proof display units (1) are respectively fixed on the front surface and the rear surface of the module frame body (10), the d-type explosion-proof box component (2) is fixed in the module frame body (10), the d-type explosion-proof loudspeaker (3) is arranged above the module frame body (10), the explosion-proof control button (4) and the explosion-proof junction box (5) are respectively fixed on transverse braces on the left side surface and the right side surface of the module frame body (10), the explosion-proof junction box (5) is a four-way explosion-proof junction box, one terminal of which is connected with the d-type explosion-proof box component (2), one terminal is connected with an external power supply, one terminal is connected with an explosion-proof control button (4), the other terminal is provided with an explosion-proof plug, the output end of the d-type explosion-proof box component (2) is connected with the input end of the explosion-proof junction box (6), two output terminals of the first explosion-proof junction box (6) are respectively connected with one nA explosion-proof display unit (1) and the d-type explosion-proof loudspeaker (3), one output terminal of the second explosion-proof junction box (6) is connected with the other nA explosion-proof display unit (1), and the other output terminal is provided with the explosion-proof plug.
2. The explosion-proof liquid crystal multimedia player of claim 1, further comprising: and the three thin steel plate stamping parts are respectively arranged above and on the left side surface and the right side surface of the explosion-proof liquid crystal multimedia player and are used for realizing the packaging of the explosion-proof liquid crystal multimedia player.
3. The explosion-proof liquid crystal multimedia player according to claim 1, wherein the nA explosion-proof display unit (1) comprises a frame (101), a sealing rubber pad (102), a polycarbonate plate (103), a liquid crystal display module (104), a sealing rubber plate (105), a heat dissipation back plate (106), a sealing lower box (107), a signal conversion plate (108), a sealing upper box (109), a cable sealing clamping device (110) and a supporting seat (111), wherein the sealing rubber pad (102), the polycarbonate plate (103), the liquid crystal display module (104), the sealing rubber plate (105) and the heat dissipation back plate (106) are sequentially arranged in the frame (101), the sealing lower box (107), the signal conversion plate (108) and the sealing upper box (109) are arranged on the heat dissipation back plate (106), and the cable sealing clamping device (110) is arranged on the sealing upper box (109).
4. An explosion-proof liquid crystal multimedia player, comprising: two nA explosion-proof display units (1), two d-type explosion-proof box parts (2), d-type explosion-proof loudspeakers (3), an explosion-proof control button (4), an explosion-proof junction box (5), two explosion-proof junction boxes (6) and a module frame body (10), wherein the two explosion-proof junction boxes (6) are respectively fixed on a back plate structural member of the two nA explosion-proof display units (1), the two nA explosion-proof display units (1) are respectively fixed on the front surface and the rear surface of the module frame body (10), the two d-type explosion-proof box parts (2) are respectively fixed in the module frame body (10), the d-type explosion-proof loudspeakers (3) are arranged above the module frame body (10), the explosion-proof control button (4) and the explosion-proof junction box (5) are respectively fixed on transverse brace bars on the left side surface and the right side surface of the module frame body (10), the explosion-proof junction box (5) is a four-way explosion-proof junction box, wherein two terminals are respectively connected with the two d-type explosion-proof box parts (2), one terminal is connected with an external power supply, one terminal is connected with an explosion-proof control button (4), the output ends of the two d-type explosion-proof box components (2) are respectively connected with the input end of an explosion-proof junction box (6), two output terminals of the first explosion-proof junction box (6) are respectively connected with one nA explosion-proof display unit (1) and the d-type explosion-proof loudspeaker (3), one output terminal of the second explosion-proof junction box (6) is connected with the other nA explosion-proof display unit (1), and the other output terminal is provided with an explosion-proof plug.
5. The explosion-proof liquid crystal multimedia player of claim 4, further comprising: and the three thin steel plate stamping parts are respectively arranged above and on the left side surface and the right side surface of the explosion-proof liquid crystal multimedia player and are used for realizing the packaging of the explosion-proof liquid crystal multimedia player.
6. The explosion-proof liquid crystal multimedia player according to claim 4, wherein the nA explosion-proof display unit (1) comprises a frame (101), a sealing rubber pad (102), a polycarbonate plate (103), a liquid crystal display module (104), a sealing rubber plate (105), a heat dissipation back plate (106), a sealing lower box (107), a signal conversion plate (108), a sealing upper box (109), a cable sealing clamping device (110) and a supporting seat (111), wherein the sealing rubber pad (102), the polycarbonate plate (103), the liquid crystal display module (104), the sealing rubber plate (105) and the heat dissipation back plate (106) are sequentially arranged in the frame (101), the sealing lower box (107), the signal conversion plate (108) and the sealing upper box (109) are arranged on the heat dissipation back plate (106), and the cable sealing clamping device (110) is arranged on the sealing upper box (109).
7. Explosion-proof liquid crystal multimedia player according to claim 4, characterized in that the rim (101) is formed by extrusion profile bending and welding.
8. Explosion-proof liquid crystal multimedia player according to claim 4, characterized in that the polycarbonate plate (103) has a thickness of 5 mm.
9. The explosion-proof liquid crystal multimedia player according to claim 4, characterized in that the lower sealed box (107) and the upper sealed box (109) form a cavity, and silicon rubber is encapsulated in the cavity, and the encapsulating thickness is not less than 2mm for the plug and the electronic device.
10. The explosion-proof liquid crystal multimedia player as claimed in claim 4, characterized in that the mounting bracket (207) in the d-shaped explosion-proof box part (2) adopts a structure of stamping and cutting L-shaped fins from aluminum alloy plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122826875.5U CN216311250U (en) | 2021-11-18 | 2021-11-18 | Explosion-proof liquid crystal multimedia player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122826875.5U CN216311250U (en) | 2021-11-18 | 2021-11-18 | Explosion-proof liquid crystal multimedia player |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216311250U true CN216311250U (en) | 2022-04-15 |
Family
ID=81121380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122826875.5U Active CN216311250U (en) | 2021-11-18 | 2021-11-18 | Explosion-proof liquid crystal multimedia player |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216311250U (en) |
-
2021
- 2021-11-18 CN CN202122826875.5U patent/CN216311250U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8995128B2 (en) | Power conversion apparatus | |
| CN202230682U (en) | LED (light-emitting diode) indoor screen | |
| WO2020119378A1 (en) | Multifunctional power supply and driving apparatus having shield | |
| CN203690320U (en) | Novel photovoltaic component for building | |
| JP5527354B2 (en) | Power converter | |
| CN216311250U (en) | Explosion-proof liquid crystal multimedia player | |
| CN201141956Y (en) | LCD device | |
| CN202121492U (en) | Power source and power source casing thereof | |
| CN104902155B (en) | A kind of closed focal plane case of space camera | |
| CN210244901U (en) | LED display screen | |
| CN210373120U (en) | Intelligence down lamp structure | |
| CN209909670U (en) | Explosion-proof oil station lamp of ultra-thin LED | |
| CN209896622U (en) | Cable bridge convenient to installation is dismantled | |
| CN208836465U (en) | A kind of high-power low pressure inverter structure | |
| CN108493878A (en) | A kind of bus duct with water-proof function | |
| CN215069064U (en) | Ultra-thin narrow frame touch-control liquid crystal display module | |
| JP3143429U (en) | Core box of composite outlet box | |
| CN213122504U (en) | Advertising machine | |
| CN219329945U (en) | Dustproof heat dissipation assembly for quantum communication equipment and quantum communication system | |
| CN210982969U (en) | L CM LCD screen that heat dispersion is good | |
| CN217088038U (en) | Hardware heat dissipation backboard for television | |
| CN218888806U (en) | Combined type multimedia installation device | |
| CN213817967U (en) | Ultrathin energy-saving liquid crystal television | |
| CN217823836U (en) | Portable small-size PDU | |
| CN216487865U (en) | Integrated relay type module machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |