Power supply based on intrinsic safety association

Abstract

The utility model discloses a power supply based on intrinsic safety association, which relates to the technical field of power supplies and comprises a DC-to-DC power supply 4, a cable gland 5 and a shell 6. The DC-to-DC power supply 4 is connected with the cable gland 5; and the shell 6 is used for packaging the DC-to-DC power supply 4 and the cable gland 5. According to the utility model, by optimizing the circuit design, the design requirement of an intrinsically safe circuit can be met without a large number of safety equipment facilities in other modes in places with higher safety requirements, such as the gas industry, and the requirements of a mounting shell and a mounting mode are reduced, so that the cost of a product is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply, in particular to a power supply based on intrinsic safety association. Background Art

[0002] For most companies, electricity consumption is very large. Faced with such a large amount of electricity consumption, the safe management of electricity consumption is also a top priority for enterprises. However, at present, the following problems often occur in corporate electricity consumption:

[0003] 1. Equipment or instruments used in industrial places such as the gas industry are generally powered by disposable batteries for circuit safety reasons.

[0004] 2. Even if the mains power can be used in some places, it also puts forward very high requirements on the access of power supply and the equipment shell. For example, the equipment that needs to be connected to the mains power needs to be installed in a very bulky explosion-proof safety box. In this way, not only does the product look very bulky, but the cost of the explosion-proof box itself is also relatively high, so the overall cost of the product will also remain high.

[0005] 3. Due to the special requirements of the natural gas industry, there are many different ways to power supply, and each requires special safety certification for the product. Each safety certification takes a lot of time, which is not conducive to the rapid introduction of products to the market. Summary of the invention

[0006] The utility model aims to overcome the deficiencies of the prior art and to provide a power supply based on intrinsic safety association.

[0007] The purpose of this utility model is achieved through the following technical solutions:

[0008] A power supply based on intrinsic safety association comprises a DC-to-DC power supply, a cable gland and a shell; the DC-to-DC power supply is connected to the cable gland; and the shell is used to package the DC-to-DC power supply and the cable gland.

[0009] Furthermore, the DC-to-DC power supply includes a 24V-to-12V isolated power supply and a 12V-to-5V non-isolated power supply; the 24V-to-12V isolated power supply is connected to the 12V-to-5V non-isolated power supply.

[0010] Furthermore, the 24V to 12V isolated power supply includes a terminal; port 1 of the terminal is connected in sequence to resistor R1, resettable fuse F1, negative electrode of TVS diode D1, negative electrode of TVS diode D2, positive electrode of electrolytic capacitor CA1, capacitor C1, inductor L1, capacitor C2, positive electrode of electrolytic capacitor CA2, isolated power management module, positive electrode of electrolytic capacitor CA3, negative electrode of zener diode D3, negative electrode of zener diode D4 and capacitor C7; port 2 of the terminal is connected in sequence to positive electrode of TVS diode D1 , the positive electrode of TVS diode D2, the negative electrode of electrolytic capacitor CA1, capacitor C1, capacitor C2, the negative electrode of electrolytic capacitor CA2, the isolated power management module, the negative electrode of electrolytic capacitor CA3, the positive electrode of Zener diode D3, the positive electrode of Zener diode D3 and capacitor C7; the terminal port 1 is connected to one side of capacitor C2, and a safety capacitor Cs1 is connected between capacitor C2 and electrolytic capacitor CA3; the terminal port 2 is connected to one side of capacitor C2, and a safety capacitor Cs2 is connected between capacitor C2 and electrolytic capacitor CA3.

[0011] Furthermore, the model used by the isolated power management module is URB2412YMD-15WR3.

[0012] Furthermore, the 12V to 5V non-isolated power supply includes a capacitor C6, a buck management module, an inductor L2 and a fuse F2 which are connected in sequence after being connected to the 12V voltage; a capacitor C3 is connected between the 1st and 6th ends of the buck management module; a resistor R2 is connected between the 5th and 4th ends of the buck management module; the capacitor C6 is arranged between the 5th and 2nd ends of the buck management module; a capacitor C5, a zener diode D5, a zener diode D6, a zener diode D7 and a zener diode D8 are connected between the 6th and 2nd ends of the buck management module; a resistor R3 and a capacitor C4 connected in parallel are connected between the 6th and 3rd ends of the buck management module; a resistor R4 is connected between the 3rd and 2nd ends of the buck management module; the resistor R3 and the resistor R4 are connected in series between the 6th and 2nd ends of the buck management module.

[0013] Furthermore, the fuse F2 is a disposable fuse.

[0014] Furthermore, the voltage reduction management module is an ETA8120S2G voltage reduction chip.

[0015] Furthermore, a power supply based on intrinsic safety association also includes a lightning protector, an air switch and an AC-to-DC switching power supply; the lightning protector is respectively connected to the air switch and the cable gland; the AC-to-DC switching power supply is respectively connected to the DC-to-DC power supply and the lightning protector, and the air switch is connected between the AC-to-DC switching power supply and the lightning protector; the lightning protector, the air switch and the AC-to-DC switching power supply are all arranged inside the shell.

[0016] Furthermore, the DC-to-DC power supply is an isolated power supply that directly outputs 5V.

[0017] The beneficial effects of the utility model are as follows: the utility model optimizes the circuit design and can meet the intrinsically safe circuit design requirements in places with relatively high safety requirements such as the gas industry without the need for a large number of other types of safety equipment and facilities, thereby reducing the requirements for the installation shell and installation method, thereby reducing the cost of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 This is a structural diagram of the isolated power supply of Example 1.

[0020] Figure 2 This is a 24V to 12V isolated power supply circuit diagram.

[0021] Figure 3 This is a 12V to 5V non-isolated power supply circuit diagram.

[0022] Figure 4 This is a structural diagram of the isolated power supply of Example 2.

[0023] Figure 5 This is a circuit diagram of the direct output 5V isolated power supply used in Example 3. DETAILED DESCRIPTION

[0024] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Embodiment 1, as Figure 1 As shown, a power supply based on intrinsic safety association includes a DC-to-DC power supply 4, a cable gland 5 and a shell 6; the DC-to-DC power supply 4 is connected to the cable gland 5; and the shell 6 is used to package the DC-to-DC power supply 4 and the cable gland 5.

[0027] In Example 1, the DC-to-DC power supply 4 includes a 24V-to-12V isolated power supply and a 12V-to-5V non-isolated power supply connected to each other;

[0028] In Example 1, Figure 2 As shown, the 24V to 12V isolated power supply includes a terminal block; port 1 of the terminal block is connected in sequence to a resistor R1, a self-recovery fuse F1, a negative electrode of a TVS diode D1, a negative electrode of a TVS diode D2, a positive electrode of an electrolytic capacitor CA1, a capacitor C1, an inductor L1, a capacitor C2, a positive electrode of an electrolytic capacitor CA2, an isolated power management module, a positive electrode of an electrolytic capacitor CA3, a negative electrode of a voltage regulator diode D3, a negative electrode of a voltage regulator diode D4, and a capacitor C7; port 2 of the terminal block is connected in sequence to a positive electrode of a TVS diode D1, a negative electrode of a TVS diode D2, a positive electrode of an electrolytic capacitor CA1, a capacitor C1, an inductor L1, a capacitor C2, a positive electrode of an electrolytic capacitor CA2, an isolated power management module, a positive electrode of an electrolytic capacitor CA3, a negative electrode of a voltage regulator diode D3, a negative electrode of a voltage regulator diode D4, and a capacitor C7; VS diode D2 positive electrode, electrolytic capacitor CA1 negative electrode, capacitor C1, capacitor C2, electrolytic capacitor CA2 negative electrode, isolated power management module, electrolytic capacitor CA3 negative electrode, voltage regulator diode D3 positive electrode, voltage regulator diode D3 positive electrode and capacitor C7; the terminal port 1 is connected to one side of capacitor C2, and a safety capacitor Cs1 is connected between capacitor C2 and electrolytic capacitor CA3; the terminal port 2 is connected to one side of capacitor C2, and a safety capacitor Cs2 is connected between capacitor C2 and electrolytic capacitor CA3.

[0029] Among them, the isolated power management module model is URB2412YMD-15WR3, which ensures that this circuit meets the basic requirements of intrinsically safe circuit design; URB2412YMD-15WR3 isolated power supply converts 9V~36V power supply into 12V output power supply, so that this circuit meets the wide input requirements.

[0030] In the figure, resistor R1 is a current limiting resistor, and F1 is a 0.5A resettable fuse. The two-stage current limiting method ensures that a large current will not be input to cause damage to the back-end circuit.

[0031] D1 and D2 are TVS diodes, which prevent the input voltage from exceeding 36V and damaging the components in the subsequent circuits.

[0032] D3 and D4 are voltage stabilizing diodes, which ensure that the maximum output voltage of the isolated power supply does not exceed 18V, thus preventing damage to the circuits behind diodes D3 and D4.

[0033] The remaining capacitors and inductors are peripheral components of the URB2412YMD-15WR3 isolated power supply circuit.

[0034] In Example 1, Figure 3As shown, the 12V to 5V non-isolated power supply includes a capacitor C6, a buck management module, an inductor L2 and a fuse F2 which are connected in sequence after being connected to the 12V voltage; a capacitor C3 is connected between the 1st and 6th ends of the buck management module; a resistor R2 is connected between the 5th and 4th ends of the buck management module; the capacitor C6 is arranged between the 5th and 2nd ends of the buck management module; a capacitor C5, a zener diode D5, a zener diode D6, a zener diode D7 and a zener diode D8 are connected between the 6th and 2nd ends of the buck management module; a resistor R3 and a capacitor C4 connected in parallel are connected between the 6th and 3rd ends of the buck management module; a resistor R4 is connected between the 3rd and 2nd ends of the buck management module; the resistor R3 and the resistor R4 are connected in series between the 6th and 2nd ends of the buck management module.

[0035] In Example 1, D5, D6, D7 and D8 are 5.6V voltage stabilizing diodes to ensure that the maximum output power supply voltage does not exceed 5.6V to avoid damage to the powered device.

[0036] In Example 1, the fuse F2 is a one-time fuse; the fuse that can be fused is used to further limit the current of the output power supply to prevent the large current from damaging the circuit of the powered device.

[0037] In Example 1, the voltage reduction management module is an ETA8120S2G voltage reduction chip, which reduces the voltage from 12V to 5V to provide power for associated devices.

[0038] In Example 1, this design adopts modular design and independent packaging. A variety of power supply access can be selected, and the products of this design can be used to power devices with higher safety requirements.

[0039] Embodiment 2, as Figure 4 As shown, on the basis of Example 1, a lightning protector 1, an air switch 2 and an AC to DC switching power supply 3 are also included between the cable gland 5 and the DC to DC power supply; the lightning protector 1 is respectively connected to the air switch 2 and the cable gland 5; the AC to DC switching power supply 3 is respectively connected to the DC to DC power supply 4 and the lightning protector 1, and the air switch 2 is connected between the AC to DC switching power supply 3 and the lightning protector 1; the lightning protector 1, the air switch 2 and the AC to DC switching power supply 3 are all arranged inside the shell 6.

[0040] The other end of the air switch 2 is grounded.

[0041] In Example 3, the URB2412YMD-15WR3 isolated power supply and the ETA8120S2G step-down chip in the DC-to-DC power supply 4 are used as an isolated power supply that directly outputs 5V. The circuit diagram of the DC-to-DC power supply is as follows: Figure 5 shown.

[0042] The utility model optimizes the circuit design and meets the requirements of intrinsically safe circuit design, so the requirements for the installation shell and installation method are significantly reduced. Therefore, in places with high safety requirements such as the gas industry, this design can achieve product miniaturization and convenient installation; at the same time, it can also significantly reduce the cost of the product.

[0043] The utility model can meet the needs of power supply from a variety of power sources and power related equipment through this design.

[0044] The utility model optimizes the circuit design and can meet the intrinsically safe circuit design requirements in places with relatively high safety requirements such as the gas industry without the need for a large number of other safety equipment and facilities, thereby reducing the requirements for the installation shell and installation method, thereby reducing the cost of the product.

[0045] The utility model adopts an isolated power supply design, which can supply power to associated equipment with higher safety requirements; when the power supply can be independently packaged in a modular design, a variety of power supply access can be selected.

[0046] It should be noted that, for the above-mentioned various method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and units involved are not necessarily required by this application.

[0047] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0048] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a ROM, a RAM, etc.

[0049] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A power supply based on intrinsic safety association, characterized in that: It comprises a DC-to-DC power supply (4), a cable gland (5) and a housing (6); the DC-to-DC power supply (4) is connected to the cable gland (5); and the housing (6) is used to package the DC-to-DC power supply (4) and the cable gland (5).

2. A power supply based on intrinsic safety association according to claim 1, characterized in that: The DC-to-DC power supply (4) comprises a 24V-to-12V isolated power supply and a 12V-to-5V non-isolated power supply; the 24V-to-12V isolated power supply is connected to the 12V-to-5V non-isolated power supply.

3. A power supply based on intrinsic safety association according to claim 2, characterized in that: The 24V to 12V isolated power supply includes a terminal block; port 1 of the terminal block is connected in sequence to a resistor R1, a self-recovery fuse F1, a negative electrode of a TVS diode D1, a negative electrode of a TVS diode D2, a positive electrode of an electrolytic capacitor CA1, a capacitor C1, an inductor L1, a capacitor C2, a positive electrode of an electrolytic capacitor CA2, an isolated power management module, a positive electrode of an electrolytic capacitor CA3, a negative electrode of a voltage regulator diode D3, a negative electrode of a voltage regulator diode D4, and a capacitor C7; port 2 of the terminal block is connected in sequence to a positive electrode of a TVS diode D1, a negative electrode of a TVS diode D2, a positive electrode of an electrolytic capacitor CA1, a capacitor C1, an inductor L1, a capacitor C2, a positive electrode of an electrolytic capacitor CA2, an isolated power management module, a positive electrode of an electrolytic capacitor CA3, a negative electrode of a voltage regulator diode D3, a negative electrode of a voltage regulator diode D4, and a capacitor C7; VS diode D2 positive electrode, electrolytic capacitor CA1 negative electrode, capacitor C1, capacitor C2, electrolytic capacitor CA2 negative electrode, isolated power management module, electrolytic capacitor CA3 negative electrode, voltage regulator diode D3 positive electrode, voltage regulator diode D3 positive electrode and capacitor C7; the terminal port 1 is connected to one side of capacitor C2, and a safety capacitor Cs1 is connected between capacitor C2 and electrolytic capacitor CA3; the terminal port 2 is connected to one side of capacitor C2, and a safety capacitor Cs2 is connected between capacitor C2 and electrolytic capacitor CA3.

4. A power supply based on intrinsic safety association according to claim 2, characterized in that: The 12V to 5V non-isolated power supply includes a capacitor C6, a buck management module, an inductor L2 and a fuse F2 which are connected in sequence after being connected to the 12V voltage; a capacitor C3 is connected between the 1st and 6th ends of the buck management module; a resistor R2 is connected between the 5th and 4th ends of the buck management module; the capacitor C6 is arranged between the 5th and 2nd ends of the buck management module; a capacitor C5, a zener diode D5, a zener diode D6, a zener diode D7 and a zener diode D8 are connected between the 6th and 2nd ends of the buck management module; a resistor R3 and a capacitor C4 connected in parallel are connected between the 6th and 3rd ends of the buck management module; a resistor R4 is connected between the 3rd and 2nd ends of the buck management module; the resistor R3 and the resistor R4 are connected in series between the 6th and 2nd ends of the buck management module.

5. A power supply based on intrinsic safety association according to claim 4, characterized in that: The fuse F2 is a one-time fuse.

6. A power supply based on intrinsic safety association according to claim 4, characterized in that: The voltage reduction management module is an ETA8120S2G voltage reduction chip.

7. A power supply based on intrinsic safety association according to claim 1, characterized in that: It also includes a lightning protector (1), an air switch (2) and an AC-to-DC switching power supply (3); the lightning protector (1) is connected to the air switch (2) and the cable gland (5) respectively; the AC-to-DC switching power supply (3) is connected to the DC-to-DC power supply (4) and the lightning protector (1) respectively, and the air switch (2) is connected between the AC-to-DC switching power supply (3) and the lightning protector (1); the lightning protector (1), the air switch (2) and the AC-to-DC switching power supply (3) are all arranged inside the housing (6).

8. A power supply based on intrinsic safety association according to claim 1, characterized in that: The DC-to-DC power supply (4) is an isolated power supply that directly outputs 5V.

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