CN103956796A - Underwater direct-current power supply - Google Patents

Abstract

The invention discloses an underwater DC power supply device, which mainly solves the problems of uneven heat dissipation and water pressure resistance of the underwater DC power supply. The power supply mainly includes a sealed cabin, a DC battery pack (7) and a filling fluid (8). The airtight cabin consists of an upper sealing cover (1), a lower sealing cover (9), a cylinder (4), an O-ring (2) and a watertight connector (10). The filling fluid ensures the internal and external pressure balance when the DC power supply works underwater. At the same time, heat dissipation fins (5) are provided inside and outside the sealed cabin, and small through holes (6) are processed on the heat dissipation fins to ensure good heat dissipation of the DC battery pack. The heat dissipation and cooling paint is coated on the outside of the sealed cabin to make the overall heat dissipation of the underwater DC power supply even. The invention can provide stable and safe current for underwater equipment in the harsh underwater environment, and has the advantages of simple structure, easy manufacture, good heat dissipation performance and water pressure resistance.

Description

An underwater DC power supply

technical field

The invention belongs to the field of underwater power supply devices, and provides a safe and stable power supply for equipment working underwater to ensure normal operation of the equipment.

Background technique

With the vigorous rise of underwater scientific investigation and underwater resource development activities, underwater equipment is becoming more and more advanced. Most underwater equipment needs power supply, and underwater power supply has become a key part to ensure the normal operation of equipment. The existing underwater direct current power supply has a complex structure and is expensive. In many cases, it is directly chosen to seal the battery pack, place the battery pack in a sealed cabin, and use a waterproof circuit. Generally, the airtight cabin body is made of rubber, plastics, fiber or metal materials. As the underwater DC power supply deepens with the working water level, the water pressure on the periphery of the sealed cabin body also increases, and the sealed cabin body is squeezed, deformed, or even damaged, resulting in the risk of leakage and a threat to personal and property safety. The existing underwater DC power supply has the defect of not being able to withstand water pressure.

Contents of the invention

The object of the present invention is to overcome the defects of the prior art, and provide an underwater direct current power supply, which can withstand water pressure and has high cost performance, and can provide continuous, sufficient and stable current for underwater equipment.

The technical solution for realizing the object of the present invention is: the direct current power supply for underwater operation includes a sealed cabin body and a DC battery pack placed in the sealed cabin body, and the sealed cabin body is filled with filling liquid.

Wherein, the filling fluid in the sealed cabin body is transformer oil.

Preferably, a heat-dissipating and cooling paint is coated on the outside of the sealed cabin.

Preferably, cooling fins are provided inside and outside the sealed cabin.

Preferably, the cooling fins are processed into a cylindrical shape or a strip shape.

Preferably, small through holes are processed on the cooling fins.

Compared with the existing underwater DC power supply, the present invention has the beneficial effects of:

It is more resistant to water pressure due to the filling fluid inside the sealed cabin housing the DC battery pack. In deep water, the sealed cabin can still maintain the balance of internal and external pressure, and protect the sealed cabin from deformation and damage.

Further, since the filling fluid is selected as transformer oil, the transformer oil has the function of heat dissipation and insulation, and prevents the DC battery pack from being eroded by moisture in the air.

Further, since the upper sealing cover of the sealed shell and the upper part of the cylinder are equipped with heat dissipation fins inside and outside, when the power supply inside the sealed shell is running, heat is generated, and the heat flow rises. After the heat dissipation fins absorb the heat, they dissipate the heat in the form of convection. Therefore, the underwater DC power supply of the present invention has good heat dissipation performance.

Further, since the small through holes are processed on the heat dissipation fins, the surface area of the heat dissipation fins is increased, thereby accelerating heat dissipation.

Furthermore, since the heat dissipation and cooling paint is coated on the outside of the sealed cabin, the overall heat dissipation of the underwater DC power supply of the present invention is uniform.

Furthermore, since the DC battery pack is mainly composed of alkaline batteries, diodes and fuses connected in series and in parallel, a diode is connected in parallel to each battery, a diode is connected in series to each group of batteries, and a fuse is connected in series to the positive pole of the battery pack, thus effectively preventing current reverse flow. Occurrence of rush and short circuit phenomena.

Tests show that the invention can provide safe and stable DC power for underwater equipment and ensure its normal operation.

Description of drawings

In order to make the content of the present invention easier to understand clearly, the present invention will be described in further detail below according to specific embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is the overall structural diagram of the present invention;

Fig. 2 is a structural diagram of the upper sealing cover of the present invention;

Fig. 3 is a structural diagram of the lower sealing cover of the present invention;

Fig. 4 is a cylinder structure diagram of the present invention;

Fig. 5 is a DC battery pack circuit connection diagram of the present invention;

Fig. 6 is an interface diagram of the DC battery pack of the present invention.

Among them: 1 is the upper sealing cover, 2 is the O-ring, 3 is the fastening bolt, 4 is the cylinder, 5 is the heat dissipation fin, 6 is the through hole of the heat dissipation fin, 7 is the DC battery pack, 8 is the filling liquid, 9 is a lower sealing cover, and 10 is a watertight connector;

2-1 is the cooling fin hole, 2-2 is the bolt hole I, 2-3 is the watertight connector fixing screw hole; 3-1 is the bolt hole II; 4-1 is the O-ring placement groove, 4-2 is the Threaded holes; 5-1 is an alkaline battery, 5-2 is a diode I, 5-3 is a diode II, and 5-4 is a fuse.

Detailed ways

As shown in FIG. 1 , the underwater DC power supply of the present invention mainly includes: a sealed cabin, a DC battery pack 7 and a filling liquid 8 . Wherein, the sealed cabin body is composed of: an upper sealing cover 1, a lower sealing cover 9, a cylinder 4, fastening bolts 3, an O-ring 2 and a watertight connector 10, etc. Filling fluid is filled in the airtight compartment in which the DC battery pack is placed, and the filling fluid protects the underwater DC power supply from being underwater and internally and externally pressure balanced. At the same time, the filling fluid is transformer oil, which has the function of heat dissipation and insulation, and prevents the DC battery pack from being eroded by moisture in the air. Radiating fins are arranged inside and outside the sealed cabin, and the cooling fins are processed into cylindrical or strip shapes. When the DC battery pack placed inside the sealed case is running, heat is generated, and the heat flow rises. After the internal heat dissipation fins absorb the heat, the internal heat is dissipated in the form of convection. The heat dissipation fins are processed with small through holes, which increase the surface area of the heat dissipation fins and accelerate heat dissipation. The external heat dissipation fins dissipate heat to the outside, achieving double heat dissipation from the inside and the outside.

The exterior of the sealed cabin of the underwater DC power supply is coated with heat dissipation and cooling paint, such as: ZS-1091 high temperature resistant insulating paint, ZS-411 radiation heat dissipation and cooling paint, etc., so that the overall heat dissipation of the underwater DC power supply is uniform.

As shown in Figure 2 and Figure 3, both the upper sealing cover 1 and the lower sealing cover 9 are disc-shaped. Bolt holes I2-2 are left on the upper sealing cover 1, which are convenient for fastening bolts 3 to pass through, and heat dissipation fins 5 are inserted through the heat dissipation fin holes 2-1. The watertight connector 10 is fixed on the watertight connector fixing screw hole 2-3 of the upper sealing cover 1, and it is connected with the two poles of the power supply in the sealing case.

As shown in Figure 4, O-ring placement grooves 4-1 and screw holes 4-2 are machined at the upper and lower ends of the cylinder 4 to facilitate the placement of O-rings 2 and fastening bolts 3, and heat dissipation is provided inside and outside the upper part of the cylinder. Fin5.

As shown in FIG. 5, the DC battery pack 7 is composed of an alkaline battery 5-1, a diode and a fuse 5-4 connected in series and in parallel. Each battery is connected in parallel with a diode I5-2, and each group of batteries is connected in series with a diode II5-3 to prevent current kickback; the anode of the DC battery pack 7 is connected in series with a fuse 5-4 to prevent a short circuit.

Make a cylindrical DC battery pack 5 as shown in Fig. 5 and Fig. 6 . Radiating fins are processed inside and outside the upper sealing cover 1 and the cylinder 4 . As shown in FIG. 1 , a lower sealing cover 9 is installed on the cylinder 4 . When installing, place the O-ring 2 in the O-ring placement groove 4-1, and fix it with the fastening bolt 3. Then the DC battery pack 7 is placed on the bottom of the sealed cabin and filled with filling liquid 8. When the DC battery pack heats up, the heat flow rises, and the cooling fins absorb heat to form convection, which has the effect of heat dissipation and cooling. The watertight connector 10 is fixed on the watertight connector fixing screw hole 2-3 of the upper sealing cover 1, and is connected to the two poles of the DC battery pack 7 inside the sealed cabin. Install the upper sealing cover 1 on the upper end surface of the cylinder 4. When installing, place the O-ring 2 in the O-ring placement groove 4-1 and fix it with the fastening bolt 3. Finally, apply heat dissipation and cooling paint on the outside of the sealed cabin body.

Claims (6)

1. A DC power supply for underwater work, comprising a sealed cabin and a DC battery pack (7) placed in the sealed cabin, characterized in that the sealed cabin is filled with filling liquid (8). 2. The underwater DC power supply according to claim 1, characterized in that the filling liquid (8) in the sealed cabin body is transformer oil. 3. The underwater direct current power supply according to claim 1, characterized in that, the outside of the sealed cabin body is coated with a heat-dissipating and cooling paint. 4. The underwater DC power supply according to claim 1, characterized in that cooling fins (5) are provided both inside and outside the sealed cabin. 5. The underwater DC power supply according to claim 4, characterized in that, the cooling fins (5) are processed into cylindrical or strip shapes. 6. The underwater DC power supply according to claim 5, characterized in that small through holes (6) are processed on the cooling fins.