CN209962610U

CN209962610U - Explosion-proof display

Info

Publication number: CN209962610U
Application number: CN201920963468.9U
Authority: CN
Inventors: 杨孟源
Original assignee: Nanjing Mengyuan Automation Equipment Co Ltd
Current assignee: Nanjing Mengyuan Automation Equipment Co Ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-01-17
Anticipated expiration: 2029-06-25

Abstract

The utility model provides an explosion-proof display, including explosion-proof shell, control module, display module, power module, explosion-proof shell includes explosion-proof case lid and explosion-proof box, explosion-proof case lid and explosion-proof box fixed connection form the explosion-proof chamber, control module, display module and power module fixed mounting are in the explosion-proof intracavity is filled with explosion-proof filler. The utility model discloses explosion-proof display size is moderate, simple to operate, and explosion-proof shell and explosion-proof filler can provide higher explosion-proof performance, are fit for using at high-risk environment such as oil depot.

Description

Explosion-proof display

Technical Field

The utility model relates to an explosion-proof display is used to oil depot belongs to explosion-proof electrical apparatus technical field.

Background

The display is widely applied to daily life and production of people, in high-risk environments such as an oil depot, and in order to avoid explosion accidents caused by gas, illumination, short circuit and the like in the using process of the display, the display is required to have the functions of water resistance, dust resistance, explosion resistance and the like.

Disclosure of Invention

In order to improve the security of display for the oil depot, the utility model provides an explosion-proof display installs equipment such as display module, control module, power module in explosion-proof housing, has higher explosion-proof performance when showing data.

In order to solve the technical problem, the utility model discloses a following technical means:

the utility model provides an explosion-proof display, mainly includes explosion-proof shell, control module, display module, power module, explosion-proof shell includes explosion-proof case lid and explosion-proof box, explosion-proof case lid and explosion-proof box fixed connection form the explosion-proof chamber, control module, display module and power module fixed mounting be in the explosion-proof intracavity.

The power module comprises a DC-DC power module, a first capacitor, a second capacitor and a first wiring terminal, wherein the input end of the DC-DC power module is connected with 24V voltage, the output end of the DC-DC power module is connected with one end of the first wiring terminal, the first capacitor and the second capacitor are connected in parallel at the output end of the DC-DC power module, and the other end of the first wiring terminal is respectively connected with the control module and the display module.

Control module includes first control chip, first communication chip, watchdog, second binding post and third binding post, first control chip connects the one end of first communication chip, the other end of first communication chip is connected the host computer is connected to second binding post's one end, second binding post's the other end, first control chip is connected to the watchdog, third binding post's one end is connected display module, first control chip is connected to third binding post's the other end.

Further, the explosion-proof cavity is filled with explosion-proof filler, and the explosion-proof filler is made of glass fiber.

Furthermore, the display module selects an LED Chinese character dot matrix display screen.

Further, the first communication chip selects an RS485 transceiver, and a TVS diode is connected in parallel to the RS485 transceiver A, B line.

Furthermore, a cable interface is arranged at the top of the explosion-proof box body.

Furthermore, tempered glass is embedded in the explosion-proof box cover, and the thickness of the tempered glass is larger than 10 mm.

Furthermore, the size of the toughened glass is larger than that of the display module, the display module is fixedly installed on the inner side of the toughened glass, and the position of the display module corresponds to the toughened glass.

Furthermore, the joint of the toughened glass and the explosion-proof box cover is sealed by epoxy resin glue.

The following advantages can be obtained by adopting the technical means:

the utility model provides an explosion-proof display, high-risk environment such as mainly used oil depot, this explosion-proof display's explosion-proof shell has better explosion-proof performance, whole explosion-proof shell adopts seal structure, in time circuit trouble can not influence the outer environment of explosion-proof shell yet, glass fiber has been filled in explosion-proof shell's explosion-proof intracavity, glass fiber has better insulating nature, the fire point is high, the heat resistance is strong, and glass fiber's waterproof nature is also fine, in normal work, glass fiber can play dampproofing effect, glass fiber can act as the fire retardant again when the display internal failure breaks out into fire, the explosion-proof ability of display has been improved. The display has the advantages that the internal circuit structure is simple, the module which is mature and not prone to failure is basically adopted, and a plurality of protection devices such as TVS diodes and capacitors are adopted in the circuit, so that overcurrent and overvoltage of the circuit can be prevented, and the risk of circuit failure is effectively reduced. Additionally, the utility model discloses explosion-proof display's size is moderate, and easy dismounting can be directly with the equipment connection communication such as computer, is fit for various scenes.

Drawings

Fig. 1 is a schematic structural diagram of an explosion-proof display according to the present invention; wherein, (a) is a front view of an explosion-proof display, and (b) is a schematic internal structure view of the explosion-proof display.

Fig. 2 is a schematic circuit diagram of a power module according to an embodiment of the present invention.

Fig. 3 is a schematic circuit diagram of a control module according to an embodiment of the present invention.

In the figure, 1 is an explosion-proof shell, 2 is a control module, 3 is a display module, 4 is a power module, 5 is an explosion-proof box cover, 6 is an explosion-proof box body, 7 is a cable connector, 8 is a cable wire, 9 is epoxy resin glue, 10 is a connecting piece, 11 is an explosion-proof cavity, 12 is toughened glass, and 13 is a nameplate.

Detailed Description

The technical scheme of the utility model is further explained by combining the attached drawings as follows:

in the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

An explosion-proof display is shown in figure 1 and mainly comprises an explosion-proof shell 1, a control module 2, a display module and a

power supply module

3 and 4. A plurality of data plates 13 have been pasted through epoxy glue 9 on explosion-proof shell surface, and explosion-proof shell can be divided into explosion-proof case lid 5 and explosion-proof box 6, and explosion-proof case lid and explosion-proof box all adopt the aluminum alloy casting to form, and explosion-proof case lid and explosion-proof box surface high-voltage static spraying plastics sky phthalein blue, explosion-proof box: l is 28mm, L is 9.5mm, the wall thickness is 5mm, and the planeness gap is less than or equal to 0.12 mm. Be provided with 2 cable interface 7 at the top of explosion-proof box, a cable interface is used for connecting outside DC power supply, and another interface is used for connecting RS485 communication line, and RS485 communication line couples together display and outside host computer, acquires the data signal that needs show, and the junction of cable conductor 8 and interface is glued with epoxy glue 9 and is sealed, ensures that the cable conductor can not drop. A connector 10 is further provided at the top of the explosion-proof case to fix the display at a designated position. Explosion-proof case lid and explosion-proof box fixed connection are in the same place, form an explosion-proof chamber 11, and control module, display module and power module fixed mounting have inlayed a toughened glass 12 in explosion-proof intracavity on explosion-proof case lid, toughened glass with the junction of explosion-proof case lid is sealed with epoxy glue, glues the length of sealing the faying face and is not less than 20mm, glues and seals thickness and be not less than 1mm, can effectively avoid glass to drop. The thickness of the toughened glass is not less than 10mm, the area of the toughened glass is slightly larger than that of the display module, the display module is installed at the inner side of the toughened glass, and the control module and the power supply module are fixed together through bolts, pillars and the like and then installed at the inner side of the display module. In order to further improve the explosion-proof performance of the display, the explosion-proof filler is filled in the explosion-proof cavity, the glass fiber is preferably selected as the explosion-proof filler, the glass fiber has good insulativity, the burning point is high, the heat resistance is strong, the problem of explosion and fire can be well avoided, the glass fiber is also good in waterproofness, and the glass fiber not only can serve as a flame retardant, but also can play a role in damp proofing and protect internal modules and circuits.

In this embodiment, the display module is preferably an LED dot matrix display screen, which can display 4 lines of characters, each line can display 8 characters or 16 numbers, and when used in the delivery system of the oil depot, the display module generally displays information such as the number of the delivery location, the number plate of the transport vehicle, the delivery condition, and the delivery volume.

The power module is used for converting 24V direct current voltage accessed into the display into 5V voltage suitable for devices such as chips and the like, the power module mainly comprises a DC-DC power module, a first capacitor, a second capacitor and a first wiring terminal, the input end of the DC-DC power module is connected with the 24V voltage, the output end of the DC-DC power module is connected with one end of the first wiring terminal, the other end of the first wiring terminal is respectively connected with the control module and the display module, the first capacitor and the second capacitor are connected to the output end of the DC-DC power module in parallel and used for protecting the DC-DC power module and preventing the voltage from being overhigh when a circuit fails. The circuit diagram of the power module in this embodiment is shown in fig. 2.

The control module of the explosion-proof display mainly comprises a first control chip, a first communication chip, a watchdog, a second wiring terminal and a third wiring terminal, wherein the first control chip is the core of the control module, the first control chip is connected with one end of the first communication chip, one end of the second wiring terminal is connected with the other end of the first communication chip, the other end of the second wiring terminal is connected with an upper computer, one end of the third wiring terminal is connected with the display module, the other end of the third wiring terminal is connected with the first control chip, and the watchdog is further connected with the first control chip. Fig. 3 is a schematic circuit diagram of the control module in this embodiment, wherein the first communication chip selects an RS485 transceiver, the specific model is SN65LBC184, 3 TVS diodes are connected in parallel to an RS485 transceiver A, B line, the specific model of the first control chip is W77E058, and the model of the watchdog is X5045.

The utility model discloses explosion-proof display's explosion-proof housing adopts the aluminum alloy preparation, has better explosion-proof performance, and whole explosion-proof housing adopts seal structure, avoids the internal circuit to expose in the air, has filled glass fiber in explosion-proof housing's explosion-proof chamber, and glass fiber is nonflammable, insulating nature is good, is the excellent flame proof material, and display internal circuit simple structure has adopted a plurality of protection devices, prevents that the circuit from overflowing the excessive pressure, can effectively reduce circuit fault frequency.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. An explosion-proof display is characterized by comprising an explosion-proof shell, a control module, a display module and a power supply module, wherein the explosion-proof shell comprises an explosion-proof box cover and an explosion-proof box body, the explosion-proof box cover and the explosion-proof box body are fixedly connected to form an explosion-proof cavity, and the control module, the display module and the power supply module are fixedly arranged in the explosion-proof cavity;

the power supply module comprises a DC-DC power supply module, a first capacitor, a second capacitor and a first connecting terminal, wherein the input end of the DC-DC power supply module is connected with 24V voltage, the output end of the DC-DC power supply module is connected with one end of the first connecting terminal, the first capacitor and the second capacitor are connected in parallel at the output end of the DC-DC power supply module, and the other end of the first connecting terminal is respectively connected with the control module and the display module;

2. The explosion-proof display device according to claim 1, wherein the explosion-proof cavity is filled with an explosion-proof filler, and the explosion-proof filler is made of glass fiber.

3. The explosion-proof display as claimed in claim 1, wherein the display module is an LED chinese character dot matrix display screen.

4. The display of claim 1, wherein the first communication chip is an RS485 transceiver, and a TVS diode is connected in parallel to the RS485 transceiver A, B.

5. The explosion-proof display device as recited in claim 1, wherein a cable port is provided at the top of the explosion-proof box body.

6. The explosion-proof display device as claimed in claim 1, wherein the explosion-proof box cover is embedded with tempered glass, and the thickness of the tempered glass is greater than 10 mm.

7. The explosion-proof display as claimed in claim 6, wherein the tempered glass is larger than the display module, the display module is fixedly installed inside the tempered glass, and the display module is located corresponding to the tempered glass.

8. The explosion-proof display device of claim 6, wherein the joint of the tempered glass and the explosion-proof box cover is sealed by epoxy resin glue.