Intrinsic safety power supply design module for liquid crystal screen

Abstract

The utility model discloses a liquid crystal screen intrinsic safety power supply design module, which comprises a liquid crystal screen, a safety barrier is arranged on the outer side of the liquid crystal screen, the liquid crystal screen is electrically connected with field equipment through a cable, and the voltage of a power supply is designed to be 12V-36V; the liquid crystal screen internal circuit module comprises a resistor R and a capacitor C11, and the resistor R and the capacitor C11 are electrically connected with the power supply; the liquid crystal screen internal power supply output module comprises a diode D1 and a diode D2, and the diode D1 and the diode D2 are electrically connected with a power supply; a power supply chip module; and the power supply chip module comprises a power supply chip. According to the utility model, when a power supply is short-circuited, current passes through the resistor and the capacitor, so that capacitor explosion caused by direct short circuit of the capacitor can be reduced, and sparks are generated, and even if the generated weak sparks are exposed in the air, a series of hazards are not caused by a mode of encapsulating the explosion-proof sealant.

Description

TECHNICAL FIELD

[0001] The utility model relates to the intrinsically safe power supply design technical field, concretely is a liquid crystal screen intrinsically safe power supply design module. BACKGROUND

[0002] Liquid crystal screen product is very common product in our life, and the liquid crystal screen can display real-time picture of our equipment work, whether the communication is normal and other information. Under different use environment, liquid crystal screen has different quality grade requirement, such as in low temperature environment, liquid crystal screen with heating function is more easily suitable for use environment, and in the environment with relatively strong light, liquid crystal screen with relatively high brightness is needed.

[0003] If in some relatively active gas or liquid environment, such as mine, gas station and other environment, a liquid crystal screen with intrinsically safe power supply is needed, and the main purpose is that when the product is damaged or short-circuited, no spark is generated, or the spark is not enough to ignite or explode the equipment in the environment, and then the circuit design is intrinsically safe circuit design.

[0004] Therefore, it is necessary to provide a liquid crystal screen intrinsically safe power supply design module to solve the above technical problems. UTILITY MODEL CONTENTS

[0005] The utility model discloses a kind of liquid crystal screen intrinsically safe power supply design modules, to solve the problem that liquid crystal screen appears short-circuit damage in mine, gas station and other harsh environment, thereby causing severe consequences (such as explosion, ignition etc.), and the technical scheme of the utility model provides a solution significantly different from prior art to the technical problem that prior art solution is too single.

[0006] To achieve the above object, the utility model provides the following technical scheme a kind of liquid crystal screen intrinsically safe power supply design module, including liquid crystal screen, the safety fence is arranged outside the liquid crystal screen, and liquid crystal screen is connected with field device by cable,

[0007] Power supply, the power supply voltage is designed as 12V-36V;

[0008] Liquid crystal screen internal circuit module, the liquid crystal screen internal circuit module includes resistance R and capacitor C11, the resistance R, capacitor C1 are connected with power supply;

[0009] Liquid crystal screen internal power output module, the liquid crystal screen internal power output module includes diode D1 and diode D2, the diode D1, diode D2 are connected with power supply;

[0010] Power supply chip module;The power supply chip module includes power supply chip, and the power supply chip is connected with power supply.

[0011] Preferably, the resistance R and the area where the capacitor C1 is located are poured and sealed.

[0012] Preferably, the diode D1 and the diode D2 are further connected with GND, and the diode D1 and the diode D2 are stabilized at 5V.

[0013] Preferably, the power supply chip is connected with a capacitor C23, a capacitor C60, a capacitor C24, a capacitor C25, a capacitor C26, a capacitor C27 and a capacitor C28, a first end of the capacitor C23 is connected with a resistance R33, and the other end is grounded, a first end of the capacitor C60 is connected with the power supply chip, and the other end is grounded, a first end of the capacitor C24 is connected with the power supply chip, and the other end is grounded, a first end of the capacitor C25 is connected with the resistance R3, and the other end is grounded, a first end of the capacitor C26 is connected with the power supply chip, and the other end is connected with R8, a first end of the capacitor C27 is connected with the resistance R8, and the other end is grounded, and a first end of the capacitor C28 is connected with the resistance R8.

[0014] Preferably, the area where the capacitor C23 and the resistance R33 are located is poured and sealed, and the area where the resistance R8 is located is poured and sealed.

[0015] Preferably, the power supply chip is further connected with a resistance R26, a resistance R7 and a diode D3.

[0016] The parts not described in the utility model are the known technology of the person skilled in the art.

[0017] Compared with the prior art, the utility model has the advantages that:

[0018] When the power supply is short-circuited, the current passes through the resistance and the capacitor, so that the capacitor explosion caused by direct short-circuit of the capacitor can be reduced, sparks are generated, and the weak sparks generated are prevented from being exposed to the air and causing a series of hazards through the pouring and sealing of the explosion-proof sealing glue.

[0019] When the power supply is short-circuited, if there is no rear-end voltage stabilizing diode, the rear-end voltage will be 24V, causing damage to the rear-end components, and after adding a voltage stabilizing tube, such as a 5V voltage stabilizing tube, the rear-end circuit can be protected.

[0020] The utility model adds a resistance, pours and seals, adds a voltage stabilizing tube and the like, stabilizes the power supply, prevents sparks from being generated, does not affect the rear-end circuit, realizes the design of the intrinsic safety power supply, and has the advantages of low cost, wider application scene, higher safety, and increased use scene of the liquid crystal screen. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1The utility model discloses a structure schematic diagram of the front end of equipment through safety barrier isolation.

[0022] Figure 2 The utility model discloses the circuit diagram of liquid crystal screen internal circuit power supply part.

[0023] Figure 3 The utility model discloses the circuit diagram of liquid crystal screen internal circuit power output part.

[0024] Figure 4 The utility model discloses a principle structure schematic diagram. Specific implementation

[0025] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the range of the utility model protection.

[0026] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relation shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it can not be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the description purpose, and can not be understood as indicating or implying relative importance. In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection", "setting" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through the intermediate medium, can be the intercommunication of two elements. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation. The embodiments will be described below according to the overall structure of the utility model.

[0027] Please refer to Figures 1-4 A liquid crystal screen intrinsic safety power supply design module, including liquid crystal screen, the outside of liquid crystal screen is provided with safety barrier, and the liquid crystal screen is electrically connected with the on-site equipment through the cable, the power input end is isolated through the safety barrier, and then the power supply is supplied to the liquid crystal screen, so that even if the liquid crystal screen is damaged and short-circuits, the front-end equipment of the safety barrier will not be affected, thereby protecting the front-end equipment;

[0028] The power supply voltage is designed as 12V-36V;

[0029] The internal circuit module of the liquid crystal screen comprises a resistor R and a capacitor C11, and the resistor R and the capacitor C1 are electrically connected with the power supply.

[0030] The internal power supply output module of the liquid crystal screen comprises a diode D1 and a diode D2, and the diode D1 and the diode D2 are electrically connected with the power supply.

[0031] The power supply chip module comprises a power supply chip, and the power supply chip is electrically connected with the power supply.

[0032] As shown in Figures 1-4 , the area where the resistor R and the capacitor C1 are located is subjected to pouring sealing treatment. When the power supply is short-circuited, the current will pass through the resistor and the capacitor, so that the explosion of the capacitor caused by direct short-circuit of the capacitor can be reduced, thereby generating sparks. In addition, the pouring explosion-proof sealing glue is used, so that even the weak sparks generated will not be exposed to the air, thereby causing a series of hazards.

[0033] As shown in Figures 1-4 , the diode D1 and the diode D2 are also connected with GND, and the diode D1 and the diode D2 are stabilized at 5V. If the input voltage of the front end of the power supply is relatively large, such as 24V power supply input, when the power supply is short-circuited, if there is no rear-end voltage stabilizing diode, the rear-end voltage will be 24V, causing damage to the rear-end components. After adding a voltage stabilizing tube, such as a 5V voltage stabilizing tube, the rear-end circuit can be protected.

[0034] As shown in Figures 1-4 , the power supply chip is connected with a capacitor C23, a capacitor C60, a capacitor C24, a capacitor C25, a capacitor C26, a capacitor C27 and a capacitor C28. The first end of the capacitor C23 is connected with a resistor R33, and the other end is grounded. The first end of the capacitor C60 is connected with the power supply chip, and the other end is grounded. The first end of the capacitor C24 is connected with the power supply chip, and the other end is grounded. The first end of the capacitor C25 is connected with a resistor R3, and the other end is grounded. The first end of the capacitor C26 is connected with the power supply chip, and the other end is connected with R8. The first end of the capacitor C27 is connected with a resistor R8, and the other end is grounded. The first end of the capacitor C28 is connected with the resistor R8. By increasing the resistance, pouring, adding a voltage stabilizing tube and other methods, the power supply is stabilized, sparks are prevented from being generated, and the rear-end circuit is not affected, thereby realizing the design of the intrinsic safety power supply.

[0035] As shown in Figures 1-4 , the area where the capacitor C23 and the resistor R33 are located is subjected to pouring, and the area where the resistor R8 is located is subjected to pouring. The pouring explosion-proof sealing glue is used, so that even the weak sparks generated will not be exposed to the air, causing a series of hazards.

[0036] AsFigures 1-4 As shown, the power supply chip is also connected with the resistor R26, the resistor R7 and the diode D3 to protect the circuit.

[0037] Working principle: when using, the power input voltage is 12V-16V, and the final output voltage is stabilized at 5V; when the power supply is short-circuited, the current will pass through the resistor and the capacitor, so that the capacitor explosion caused by the direct short circuit of the capacitor can be reduced, thereby generating sparks; and through the pouring explosion-proof sealing glue, even if weak sparks are generated, they will not be exposed to the air, thereby triggering a series of hazards; if the front-end input voltage of the power supply is relatively large, such as 24V power input, when the power supply is short-circuited, if there is no rear-end voltage stabilizing diode, the rear-end voltage will be 24V, causing damage to the rear-end components; after adding a voltage stabilizing tube, such as a 5V voltage stabilizing tube, the rear-end circuit can be protected; by increasing the resistance, pouring, adding a voltage stabilizing tube and other ways, the power supply can be stabilized to prevent sparks and have no impact on the rear-end circuit, thereby realizing the design of the intrinsically safe power supply.

[0038] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but rather can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. The present application thus considers the embodiments to be exemplary in nature and non-limiting, the scope of the present application being defined by the appended claims rather than the above description, and therefore aims to encompass all variations falling within the meaning and scope of the equivalent elements of the claims. Any reference signs in the claims should not be considered as limiting the claims involved.

Claims

1. A kind of liquid crystal screen intrinsically safe power supply design module, including liquid crystal screen, the safety fence is provided with outside the liquid crystal screen, and liquid crystal screen is electrically connected with field device by cable, it is characterized in that: Power supply, the voltage of the power supply is designed as 12V-36V; Liquid crystal screen internal circuit module, the liquid crystal screen internal circuit module includes resistance R and capacitor C11, the resistance R, capacitor C1 with power supply are electrically connected; Liquid crystal screen internal power output module, the liquid crystal screen internal power output module includes diode D1 and diode D2, diode D1, diode D2 with power supply are electrically connected; Power supply chip module;The power supply chip module includes power supply chip, and the power supply chip is electrically connected with power supply.

2. The intrinsically safe power supply design module for a liquid crystal screen according to claim 1, characterized in that: The region where the resistance R and capacitor C1 are located is poured and sealed.

3. The intrinsically safe power supply design module for a liquid crystal screen according to claim 1, characterized in that: Diode D1, diode D2 are also connected with GND, and diode D1, diode D2 are stabilized at 5V.

4. The intrinsically safe power supply design module for a liquid crystal screen according to claim 1, characterized in that: The power supply chip is connected with capacitor C23, capacitor C60, capacitor C24, capacitor C25, capacitor C26, capacitor C27 and capacitor C28, the first end of the capacitor C23 is connected with resistance R33, and the other end is grounded, the first end of the capacitor C60 is connected with power supply chip, and the other end is grounded, the first end of the capacitor C24 is connected with power supply chip, and the other end is grounded, the first end of the capacitor C25 is connected with resistance R3, and the other end is grounded, the first end of the capacitor C26 is connected with power supply chip, and the other end is connected with R8, the first end of the capacitor C27 is connected with resistance R8, and the other end is grounded, the first end of the capacitor C28 is connected with resistance R8.

5. The intrinsically safe power supply design module for a liquid crystal screen according to claim 4, characterized in that: The region where the capacitor C23 and resistance R33 are located is poured and sealed, and the region where the resistance R8 is located is poured and sealed.

6. The intrinsically safe power supply design module for a liquid crystal screen according to claim 1, characterized in that: The power supply chip is also connected with resistance R26, resistance R7 and diode D3.

Images