A moisture-proof internal circulation dry-type transformer that is easy to dissipate heat

Abstract

The utility model discloses a moisture-proof internal circulation dry-type transformer which is convenient for heat dissipation, relates to the technical field of dry-type transformers, comprises a sealed box and a box door, a bracket is fixedly installed at the inner bottom end of the sealed box, a transformer is fixedly installed at the top end of the bracket, three air inlets are arranged at the top end of the sealed box, an exhaust fan is fixedly installed at the top end of the air inlet, and internal circulation inside the sealed box is realized through the exhaust fan, the exhaust pipe, the heat dissipation structure, the blowing pipe, the blowing port, the blowing fan and the negative pressure prevention structure, so that the transformer can be cooled and moisture-proofed, and when negative pressure is generated inside the sealed box, air pressure balance can be quickly performed, so that the heat dissipation effect and the safety effect are effectively achieved, and the problem that the cooling of the dry transformer in the traditional dry transformer easily leads to the pollution of moisture and dust in the outside air, which affects the service life of the dry transformer and the safety problem during use is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of dry-type transformers, in particular to a moisture-proof internal circulation dry-type transformer that is convenient for heat dissipation. Background Art

[0002] A dry-type transformer is a transformer whose core and winding are not immersed in insulating oil. At present, the boxes used for dry-type transformers are generally equipped with cooling fans, exhaust holes and ventilation holes to cool the dry-type transformers.

[0003] However, the existing cooling method is to take away the heat through air flow. The dry-type transformer is in direct contact with the outside air and is easily contaminated by moisture and dust in the air, which affects the life of the dry-type transformer. Utility Model Content

[0004] The main purpose of the utility model is to provide a moisture-proof internal circulation dry-type transformer that is easy to dissipate heat, which can effectively solve the technical problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A moisture-proof internal circulation dry-type transformer for easy heat dissipation comprises a sealed box and a box door, a bracket is fixedly installed at the bottom end of the sealed box, a transformer is fixedly installed at the top end of the bracket, three air inlets are arranged at the top end of the sealed box, an exhaust fan is fixedly installed at the top end of the air inlet, an exhaust pipe is fixedly connected to the top end of the exhaust fan, and a heat dissipation structure is arranged between the exhaust pipe and the sealed box;

[0007] The heat dissipation structure includes a heat exchange box, which is fixedly installed on the top of a sealed box. A heat exchange groove and a cooling groove are provided in the sealed box. A filter is fixedly installed on one side of the cooling groove of the heat exchange box. A cooling pipe, a cooling fan and a heat exchange pump are fixedly installed in the cooling groove. A heat exchange pipe is fixedly installed in the heat exchange groove.

[0008] As a further solution of the utility model, a blowing pipe is fixedly installed through the bottom end of the heat exchange tank, and the blowing pipe is fixedly installed through the sealing box with a plurality of blowing ports.

[0009] As a further solution of the utility model, an air supply fan is fixedly connected between the air blowing port at the bottom and the air blowing pipe, and the cooling pipe, the heat exchange pump and the heat exchange pipe are all fixedly connected.

[0010] As a further solution of the utility model, the air inlet is a frustum structure, and the exhaust pipe is fixedly connected to the heat exchange tank.

[0011] As a further solution of the utility model, a negative pressure prevention structure is provided near the rear end of the heat exchange tank, and the negative pressure prevention structure includes an air exchange duct, which is fixedly installed at the rear end of the heat exchange box, and a movable groove is fixedly installed inside the air exchange duct, and a sealing ball is slidably installed inside the movable groove, and a spring is fixedly connected between the sealing ball and the movable groove, and the front end of the air exchange duct is fixedly connected to an air exchange box, and a dehumidification plate is fixedly installed inside the air exchange box, and a filter screen 2 is provided at the front end of the air exchange box, and a plurality of speed reduction plates are fixedly installed at the front end of the air exchange box.

[0012] As a further solution of the utility model, the rear end of the movable groove is a cylindrical structure, and the middle of the movable groove is an open structure.

[0013] As a further solution of the utility model, the speed reduction plate is a wave-shaped structure, and a desiccant is provided inside the dehumidification plate.

[0014] The beneficial effects of the utility model are as follows:

[0015] By arranging the exhaust fan, the exhaust pipe, the heat dissipation structure, the blowing pipe, the blowing port and the blowing fan, the air in the sealed box can circulate, and the heat can be dissipated in the heat dissipation structure and the transformer can be cooled by internal circulation through the blowing port, which has the effect of cooling and preventing moisture;

[0016] By setting up an anti-negative pressure structure, when negative pressure is generated inside the sealed space due to continuous temperature rise and fall and air flow, it can be quickly connected to the outside world to eliminate the negative pressure, and the moisture and dust will be removed when the outside air enters, effectively improving the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a moisture-proof internal circulation dry-type transformer that is easy to dissipate heat;

[0018] Figure 2 This is a schematic diagram of the pipeline connection of a moisture-proof internal circulation dry-type transformer that is easy to dissipate heat;

[0019] Figure 3 This is a schematic diagram of the heat dissipation structure of a moisture-proof internal circulation dry-type transformer for easy heat dissipation according to the utility model;

[0020] Figure 4 The utility model is a schematic diagram of the negative pressure prevention structure of a dry-type transformer with moisture-proof internal circulation and convenient heat dissipation.

[0021] In the figure: 1. sealed box; 2. box door; 3. bracket; 4. transformer; 5. air inlet; 6. exhaust fan; 7. exhaust pipe; 8. heat dissipation structure; 9. anti-negative pressure structure; 10. blowing pipe; 11. blowing port; 12. air supply fan; 801. heat exchange box; 802. heat exchange tank; 803. cooling tank; 804. filter one; 805. cooling pipe; 806. cooling fan; 807. heat exchange pump; 808. heat exchange pipe; 901. air exchange pipe; 902. movable tank; 903. blocking ball; 904. spring; 905. air exchange box; 906. dehumidification plate; 907. filter two; 908. speed reduction plate. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] like Figure 1-4 As shown, a moisture-proof internal circulation dry-type transformer for easy heat dissipation comprises a sealed box 1 and a box door 2, a bracket 3 is fixedly installed at the bottom end of the sealed box 1, a transformer 4 is fixedly installed at the top of the bracket 3, three air inlets 5 are arranged at the top of the sealed box 1, an exhaust fan 6 is fixedly installed at the top of the air inlet 5, an exhaust pipe 7 is fixedly connected to the top of the exhaust fan 6, and a heat dissipation structure 8 is arranged between the exhaust pipe 7 and the sealed box 1;

[0024] The heat dissipation structure 8 includes a heat exchange box 801, which is fixedly installed on the top of the sealed box 1. A heat exchange groove 802 and a cooling groove 803 are provided in the sealed box 1. A filter 804 is fixedly installed on one side of the heat exchange box 801 located on the cooling groove 803. A cooling pipe 805, a cooling fan 806 and a heat exchange pump 807 are fixedly installed in the cooling groove 803. A heat exchange pipe 808 is fixedly installed in the heat exchange groove 802.

[0025] In this embodiment, a blowing pipe 10 is fixedly installed on the bottom end of the heat exchange groove 802 , and the blowing pipe 10 is fixedly installed on the sealing box 1 with a plurality of blowing ports 11 .

[0026] The blowing pipe 10 and the blowing port 11 have the effect of conveying the air after heat exchange and cooling to the inside of the sealed box 1 to cool the heat exchanger 4.

[0027] In this embodiment, an air supply fan 12 is fixedly connected between the air blowing port 11 at the bottom and the air blowing pipe 10 , and the cooling pipe 805 , the heat exchange pump 807 and the heat exchange pipe 808 are all fixedly connected.

[0028] The air supply fan 12 has the effect of accelerating the internal circulation velocity of the air, and the heat exchange pump 807 has the effect of circulating the cooling medium between the cooling tube 805 and the heat exchange tube 808.

[0029] In this embodiment, the air inlet 5 is a frustoconical structure, and the exhaust pipe 7 is fixedly connected to the heat exchange tank 802 .

[0030] The round head structure makes the air intake efficiency of the air inlet 5 faster, and can take away the hot air more quickly and bring it to the heat exchange tank 802 through the exhaust pipe 7.

[0031] In this embodiment, a negative pressure prevention structure 9 is provided at the rear end of the heat exchange groove 802, and the negative pressure prevention structure 9 includes an air exchange duct 901, which is fixedly installed at the rear end of the heat exchange box 801, and a movable groove 902 is fixedly installed inside the air exchange duct 901, and a blocking ball 903 is slidably installed inside the movable groove 902, and a spring 904 is fixedly connected between the blocking ball 903 and the movable groove 902, and an air exchange box 905 is fixedly connected to the front end of the air exchange duct 901, and a dehumidification plate 906 is fixedly installed inside the air exchange box 905, a filter screen 907 is provided at the front end of the air exchange box 905, and a plurality of speed reduction plates 908 are fixedly installed at the front end of the air exchange box 905.

[0032] The negative pressure prevention structure 9 can quickly balance the pressure when negative pressure is generated in the sealed box 1 , thereby preventing the negative pressure from damaging the transformer 4 .

[0033] In this embodiment, the rear end of the movable groove 902 is a cylindrical structure, and the middle of the movable groove 902 is an open structure.

[0034] The cylindrical structure can cooperate with the blocking ball 903 to block the movable groove 902. When the blocking ball 903 enters the opening structure, the blockage is released.

[0035] In this embodiment, the speed reduction plate 908 is a wave-shaped structure, and a desiccant is disposed inside the dehumidification plate 906 .

[0036] The wavy structure has the effect of reducing the flow rate of air, which can effectively prevent the impact of high-flow air on the cooling tube 805, and the desiccant has the effect of absorbing moisture in the air.

[0037] It should be noted that the utility model is a moisture-proof internal circulation dry-type transformer that is easy to dissipate heat. When in use, after the box door 2 is closed, the interior of the sealed box 1 is in a sealed state. By starting the exhaust fan 6, the exhaust fan 6 draws away the air heated by the heat generated by the transformer 4 in the sealed box 1 when it is working, and enters the heat exchange tank 802 in the heat exchange box 801 through the exhaust pipe 7. After exchanging heat with the cooling medium in the heat exchange pipe 808, the exhaust fan 12 passes through the blowing pipe 10 at the bottom, and the air is accelerated by the air supply fan 12. The cooled air cools down the transformer 4 through the air outlet 11. The cooling medium of the heat exchange tube 808 circulates in the cooling tube 805 and the heat exchange tube 808 through the heat exchange pump 807 after heat exchange. Under the action of the cooling fan 806 in the cooling tank 803, the cooling medium after heat exchange is cooled down, and the heat is discharged to the outside environment through the filter 804. The air will only circulate and cool down inside the sealed box 1, and will not contact with the outside air, so as to prevent moisture from affecting the operation of the transformer 4.

[0038] When the air circulates continuously, negative pressure may be generated. Under negative pressure conditions, the operation and service life of the transformer 4 will be affected, and the box door 2 cannot be opened. When negative pressure is generated, under the action of external atmospheric pressure, the blocking ball 903 will move along the movable groove 902, so that the air exchange duct 901 is connected, and the air enters the heat exchange box 801 through the air exchange duct 901, passes through the dehumidification plate 906 and the filter screen 907 in the air exchange box 905, thereby removing moisture and dust in the outside air. The air passes through the speed reduction plate 908 to reduce the air flow rate to prevent the air from impacting the cooling pipe 805. After the air pressure is balanced, under the elastic force of the spring 904, the blocking ball 903 blocks the air exchange duct 901 to prevent air from entering.

[0039] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A moisture-proof internal circulation dry-type transformer for easy heat dissipation, comprising a sealed box (1) and a box door (2), wherein a bracket (3) is fixedly installed at the bottom end of the sealed box (1), a transformer (4) is fixedly installed at the top end of the bracket (3), three air inlets (5) are provided at the top end of the sealed box (1), an exhaust fan (6) is fixedly installed at the top end of the air inlet (5), and an exhaust pipe (7) is fixedly connected to the top end of the exhaust fan (6), characterized in that: A heat dissipation structure (8) is provided between the exhaust pipe (7) and the sealing box (1); The heat dissipation structure (8) comprises a heat exchange box (801), wherein the heat exchange box (801) is fixedly mounted on the top of a sealed box (1), wherein a heat exchange groove (802) and a cooling groove (803) are provided in the sealed box (1), wherein a filter screen (804) is fixedly mounted on one side of the cooling groove (803) of the heat exchange box (801), wherein a cooling pipe (805), a cooling fan (806) and a heat exchange pump (807) are fixedly mounted in the cooling groove (803), and a heat exchange pipe (808) is fixedly mounted in the heat exchange groove (802).

2. A moisture-proof internal circulation dry-type transformer for easy heat dissipation according to claim 1, characterized in that: A blowing pipe (10) is fixedly installed at the bottom end of the heat exchange groove (802), and the blowing pipe (10) passes through the sealing box (1) and is fixedly installed with a plurality of blowing ports (11).

3. A moisture-proof internal circulation dry-type transformer for easy heat dissipation according to claim 2, characterized in that: An air supply fan (12) is fixedly connected between the air blowing port (11) at the bottom and the air blowing pipe (10), and the cooling pipe (805), the heat exchange pump (807) and the heat exchange pipe (808) are all fixedly connected.

4. A moisture-proof internal circulation dry-type transformer for easy heat dissipation according to claim 1, characterized in that: The air inlet (5) is a truncated cone structure, and the exhaust pipe (7) is fixedly connected to the heat exchange tank (802).

5. The moisture-proof internal circulation dry-type transformer with convenient heat dissipation according to claim 1, characterized in that: The heat exchange groove (802) is provided with a negative pressure prevention structure (9) at the rear end, and the negative pressure prevention structure (9) includes an air exchange duct (901), the air exchange duct (901) is fixedly installed at the rear end of the heat exchange box (801), a movable groove (902) is fixedly installed inside the air exchange duct (901), a blocking ball (903) is slidably installed inside the movable groove (902), a spring (904) is fixedly connected between the blocking ball (903) and the movable groove (902), the front end of the air exchange duct (901) is fixedly connected to an air exchange box (905), a dehumidification plate (906) is fixedly installed inside the air exchange box (905), a filter screen 2 (907) is provided at the front end of the air exchange box (905), and a plurality of speed reduction plates (908) are fixedly installed at the front end of the air exchange box (905).

6. A moisture-proof internal circulation dry-type transformer for easy heat dissipation according to claim 5, characterized in that: The rear end of the movable groove (902) is a cylindrical structure, and the middle of the movable groove (902) is an open structure.

7. A moisture-proof internal circulation dry-type transformer for easy heat dissipation according to claim 5, characterized in that: The speed reduction plate (908) is a wave-shaped structure, and a desiccant is provided inside the dehumidification plate (906).

Images