CN111816408A - an outdoor transformer - Google Patents

Abstract

The invention relates to a transformer, and discloses an outdoor transformer, which comprises a transformer casing (1), a heat dissipation pipe (2) is mounted on the outer side wall of the transformer casing (1), and the transformer casing (1) comprises a casing The body (101), the upper end face and the lower end face of the housing body (101) are respectively provided with an upper annular groove (103) and a lower annular groove (104) with openings facing upwards and downwards, and the cooling pipes (2) Two parallel passages are formed inside, which are an oil passage (201) and a water passage (202). The upper and lower ends of the water passage (202) are communicated with the upper annular groove (103) and the lower annular groove (104) respectively. In the present invention, through the structural design of the transformer casing, the waterproof structure can achieve good heat dissipation effect while waterproofing.

Description

an outdoor transformer

technical field

The invention relates to a transformer, in particular to an outdoor transformer.

Background technique

Transformer is a device that uses the principle of electromagnetic induction to change AC voltage, especially for industrial electricity. However, with the continuous development of science and technology, people's requirements for transformers are getting higher and higher, resulting in traditional transformers can no longer meet people's needs. Usage requirements.

The prior art also provides some transformers that can adapt to work requirements. For example, an existing waterproof transformer is a transformer with a waterproof (moisture/rainproof) function. The existing waterproof transformers are generally equipped with special protective protective shells or covers, and the internal transformers are potted and sealed, which can cope with harsh environments such as high temperature, humidity, rain, and water immersion. It is widely used in chemical engineering, mining area mines, ship equipment, electronic sanitary equipment, industrial atomizing humidifier, medical equipment, precision instruments and other industries.

When the waterproof transformer is used outdoors, due to the large changes in environmental factors, it must have good heat dissipation performance. The existing waterproof transformer is sealed, and the heat dissipation performance is difficult to fully meet the environmental changes. Transformers with heat dissipation performance are a trend in current technology research and development.

SUMMARY OF THE INVENTION

Aiming at the problems existing in the waterproof transformer in the prior art, the present invention provides an outdoor transformer.

In order to solve the above-mentioned technical problems, the present invention is solved by the following technical solutions:

An outdoor transformer includes a transformer casing, the transformer casing is filled with transformer oil, the outer side wall of the transformer casing is provided with a heat dissipation pipe that communicates with the inside of the transformer casing, and the transformer casing includes a casing body and a cover closed on the casing. The cover plate on the upper end surface of the body, each outer side wall of the housing body is provided with a plurality of radiating pipes arranged in parallel, and the upper and lower end surfaces of the housing body are respectively provided with upward and downward openings. The annular groove and the lower annular groove, two parallel passages are formed inside the heat pipe, which are the oil passage and the water passage respectively. The inside of the transformer shell is communicated, and the upper and lower ends of the water passage are respectively communicated with the upper annular groove and the lower annular groove. By draining the rainwater into the heat dissipation pipe, it directly acts on the oil passage, and flows with the flow of the transformer oil in the oil passage, and makes the oil passage and the water passage correspond one by one, without interfering and affecting each other, which can effectively strengthen the heat dissipation. The cooling effect of the tube.

Preferably, the bottom of the transformer housing is also provided with a base, the base is in the shape of a groove with a cavity inside and an open upper end, the upper end surface of the side wall of the base is sealed with the lower end surface of the transformer housing, and the upper end surface of the side wall of the base is sealed. A base annular groove with an upward opening opposite to the lower annular groove is also provided, and the base annular groove communicates with the cavity inside the base. The arrangement of the base can facilitate the placement of the transformer casings on the ground on the one hand, and protect the transformer casings, and on the other hand, can also strengthen the heat dissipation effect on the bottom surface of the transformer casings.

Preferably, the side wall of the base is provided with a water inlet pipe that communicates with the cavity inside the base, the water inlet pipe is provided with a water inlet valve, and the upper end surface of the housing body is a stepped surface with a high inside and a low outside, and the stepped surface includes An annular gap is formed between the inner first end surface and the outer second end surface, the lower surface of the cover plate and the second end surface, and the upper annular groove is arranged on the second end surface and communicates with the annular gap. On the one hand, the arrangement of the annular gap can make it easier for rainwater to enter the heat dissipation pipe to dissipate heat, and on the other hand, it can also make it easier to discharge when the heat dissipation pipe is filled with water for heat dissipation.

Preferably, the first end surface is provided with a first annular projection, and the lower surface of the cover plate is provided with an annular groove into which the first annular projection is clamped. The arrangement of the first annular projection and the annular groove can effectively enhance the stability and sealing of the connection between the cover plate and the housing body.

Preferably, a gasket is provided between the first annular projection and the annular groove. The arrangement of the sealing gasket can further strengthen the sealing between the cover plate and the housing body.

Preferably, the lower surface of the cover plate is further provided with a second annular projection extending downward, and the second annular projection is in an interference fit with the inner side wall of the housing body. The cooperation between the second annular projection and the inner side wall of the housing body can further enhance the stability of the connection between the cover plate and the housing body.

Preferably, the side wall of the base is provided with a water outlet pipe that communicates with the cavity inside the base, and the water outlet pipe is provided with a water outlet valve. The arrangement of the water outlet pipe can reasonably adjust the water in the inner cavity of the base according to the needs.

Preferably, the cavity inside the base is provided with a plurality of partitions dividing the cavity into a plurality of compartments, the lower end of the partition is fixed on the lower bottom surface of the base, and the height of the upper end is lower than that of the cavity depth. The arrangement of the partition plate can prevent the water in the base from contacting the bottom surface of the transformer casing all the time, thereby reducing the corrosion to the bottom surface of the transformer casing.

The present invention has significant technical effects due to the adoption of the above technical solutions:

In the present invention, through the structural design of the transformer casing, the waterproof structure can achieve good heat dissipation effect while waterproofing.

Description of drawings

FIG. 1 is a schematic structural diagram of Embodiment 1 of the present invention.

FIG. 2 is a schematic structural diagram of the housing body in FIG. 1 .

FIG. 3 is a schematic structural diagram of the base in FIG. 1 .

FIG. 4 is a cross-sectional view taken along the oil passage in FIG. 1 .

FIG. 5 is a cross-sectional view taken along the water passage in FIG. 1 .

FIG. 6 is a cross-sectional view taken along the side wall of the housing body in FIG. 1 .

FIG. 7 is a schematic structural diagram of the heat pipe in FIG. 1 .

The names of the parts referred to by the numerals in the drawings are as follows: 1—transformer housing, 2—radiating pipe, 3—base, 101—shell body, 102—cover plate, 103—upper annular groove, 104—lower Annular groove, 105—first end face, 106—second end face, 107—annular gap, 108—first annular bump, 109—second annular bump, 201—oil passage, 202—water passage, 301 - Annular groove on the base, 302 - water inlet pipe, 303 - water inlet valve, 304 - water outlet pipe, 305 - water outlet valve, 306 - partition plate.

Detailed ways

The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Example 1

An outdoor transformer, as shown in Figures 1-7, includes a transformer casing 1, the transformer casing 1 is filled with transformer oil, and the transformer casing 1 is also provided with a transformer main body. The transformer main body includes an iron core and a winding around the iron core. The outer side wall of the transformer casing 1 is provided with a heat dissipation pipe 2 that communicates with the interior of the transformer casing 1. The transformer casing 1 includes a casing body 101 and a cover plate 102 that is covered on the upper end face of the casing body 101. , each outer side wall of the housing body 101 is provided with a plurality of radiating pipes 2 arranged in parallel, and the cover plate 102 is provided with pipes connected to the oil pillow.

The upper end surface and the lower end surface of the housing body 101 are respectively provided with an upper annular groove 103 and a lower annular groove 104 with openings facing upward and downward. They are the oil passage 201 and the water passage 202 respectively. The upper and lower ends of the oil passage 201 are respectively connected with the upper and lower ends of the side walls of the transformer housing 1 and communicate with the interior of the transformer housing 1. The upper and lower ends of the water passage 202 respectively communicate with the upper annular groove 103 and the lower annular groove 104 .

In this embodiment, on the one hand, a heat dissipation pipe 2 is arranged on the transformer, and the upper and lower ends of the heat dissipation pipe 2 are connected with the upper and lower ends of the transformer casing 1 respectively, so as to realize the upper and lower interaction of the transformer oil in the transformer casing 1, so that the transformer oil is in the In the flow state and through the heat pipe 2, the transformer oil interacts with the outside world in a larger area, so as to achieve the purpose of heat dissipation. On the other hand, two parallel channels are formed inside the heat pipe 2, the water passage 202 and the oil passage 201. Adjacent to each other, the thermal interaction between the water in the water passage 202 and the oil in the oil passage 201 is realized, and the cooling effect of the oil passage 201 is further enhanced by passing cold water in the water passage 202 . The water passage 202 corresponds to the oil passage 201 one-to-one, and both are arranged in the heat dissipation pipe 2. On the one hand, it will not affect the heat dissipation of the oil passage 201 itself, and it still has a large enough contact area with the outside world. Adjacent to the oil passage 201, it directly acts on the oil passage 201, and the water in the water passage 202 flows with the flow of the transformer oil in the oil passage 201, which can enhance the heat interaction to a greater extent, and one-to-one correspondence The water-passing channel 202 and the oil-passing channel 201 can conduct thermal interaction independently, and there is no interference or influence between the adjacent heat dissipation pipes 2, which minimizes the influence of external factors on heat dissipation interference.

In this embodiment, the bottom of the transformer housing 1 is further provided with a base 3. The base 3 is in the shape of a groove with a cavity inside and an open upper end. The upper end surface of the side wall is also provided with a base annular groove 301 with an upward opening opposite to the lower annular groove 104 , and the base annular groove 301 communicates with the cavity inside the base 3 .

During the use of the transformer, an integral molding process is generally adopted between the side wall and the bottom plate of the transformer casing 1, and no special sealing is required. The waterproof part is mainly concentrated between the side wall of the transformer casing 1 and the upper cover plate 102. Since the cover plate 102 needs to be opened and closed, the sealing process at the gap is particularly critical. In this embodiment, when there is rainwater, the rainwater enters through the gap between the cover plate 102 and the upper end face of the transformer casing 1. Due to the cut-off of the upper annular groove 103, the rainwater does not flow into the outer casing, but flows into the outer casing. into the upper annular groove 103 , and then drain into the lower annular groove 104 through the water channel 202 , and then stay in the base 3 through the base annular groove 301 . During this process, the rainwater passes through the radiator pipe 2 to first exchange heat with the oil passage 201 in the radiator pipe 2 to enhance the heat dissipation effect of the radiator pipe 2, and then the rainwater is sent to the inner cavity of the base 3. When the rainwater accumulates for a certain period of time It directly acts on the lower surface of the transformer casing 1 to further dissipate heat from the lower surface of the transformer casing 1 .

In this embodiment, the side wall of the base 3 is provided with a water inlet pipe 302 that communicates with the cavity inside the base 3 , the water inlet pipe 302 is provided with a water inlet valve 303 , and the upper end surface of the housing body 101 is a step that is high inside and low outside. The stepped surface includes an inner first end surface 105 and an outer second end surface 106, an annular gap 107 is formed between the lower surface of the cover plate 102 and the second end surface 106, and the upper annular groove 103 is provided on the second end surface 106 And communicate with the annular gap 107 . The setting of the annular gap 107 is not only to enable rainwater to easily enter the upper annular groove 103 and then to enhance the heat dissipation effect on the heat dissipation pipe 2, and when it is sunny, in order to strengthen the heat dissipation of the transformer, the water inlet pipe 302 is used to heat the base 3. The cold water is injected into it, and the water flows into the heat pipe 2 in the reverse direction to dissipate heat to the heat pipe 2. When the water is injected into the base 3, it first fills the base 3 to dissipate heat to the bottom of the transformer, and then flows into the water passage 202 in the reverse direction. At this time, the annular gap 107 is equivalent to a water outlet, so that the injected water flows out through the annular gap 107, so that the injected water can flow out in time to form a flow channel, so as to avoid excessive pressure on the inner wall of the water passage 202, and also avoid injection. The water entering the casing through the gap between the cover plate 102 and the casing can also make the water flow into a flowing state, so as to prevent the water from accumulating in the base 3 or the heat pipe 2, causing the water temperature to rise and losing the function of improving the heat dissipation effect.

In this embodiment, the first end face 105 is provided with a first annular projection 108, and the lower surface of the cover plate 102 is provided with an annular groove into which the first annular projection 108 is inserted, wherein the first annular projection 108 and the annular There are gaskets between the grooves. The lower surface of the cover plate 102 is further provided with a second annular projection 109 extending downward. The second annular projection 109 is in an interference fit with the inner side wall of the housing body 101 . During the use of the transformer, if there is too much rainwater that cannot flow into the upper annular groove 103 in time, it is still possible to penetrate into the gap between the cover plate 102 and the upper end of the casing, and thus pass through the first annular bump 108 and the annular groove. Disposing a gasket between the two can effectively ensure that rainwater cannot penetrate, and the connection between the first annular bump 108 and the annular groove and the connection between the second annular bump 109 and the inner side wall of the housing body 101 Both can further strengthen the connection stability between the cover plate 102 and the transformer housing 1 .

In this embodiment, the side wall of the base 3 is provided with a water outlet pipe 304 that communicates with the cavity inside the base 3 , and the water outlet pipe 304 is provided with a water outlet valve 305 . When the water is poured into the base 3, the water outlet pipe 304 is closed, so that the water flow can gather in the base 3 to dissipate heat from the bottom of the transformer housing 1, and on the other hand, it can smoothly flow into the heat dissipation pipe 2 to strengthen the cooling effect of the heat dissipation pipe 2. cooling effect.

In this embodiment, the cavity inside the base 3 is provided with a plurality of partitions 306 that divide the cavity into a plurality of compartments. at the depth of the cavity. And when there is no need to strengthen the heat dissipation, the water in the base 3 is discharged in time through the water outlet pipe 304, and the height of the compartment is less than the depth of the cavity, so as to prevent the water in the base 3 from being directly connected to the transformer shell 1 during the process of non-enhanced heat dissipation. Surface contact, reducing corrosion to the bottom of the transformer case 1, avoiding direct contact between the lower surface of the transformer case 1 and the ground, and protecting the transformer case 1 to a certain extent. And if the transformer shell 1 is directly placed on the ground, since the internal temperature of the transformer is greater than the ground temperature, and the gap between the bottom surface of the transformer and the bottom surface is small, it is difficult to dissipate heat from the bottom surface of the transformer and the heat will accumulate. During this time, the water in the base 3 is not completely discharged. Because it is in a non-enhanced heat dissipation process at this time, the outside temperature is not high, the water in the base 3 is at normal temperature, and the lower part of the base 3 is normal temperature water and the upper part is air. In this state, the base 3 still has a large heat dissipation capacity, and then the heat dissipation effect of the base 3 on the bottom of the transformer housing 1 can still be achieved.

In a word, the above are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the patent of the present invention.

Claims (8)

1. An outdoor transformer, comprising a transformer casing (1), wherein transformer oil is installed in the transformer casing (1), and a heat dissipation pipe communicating with the interior of the transformer casing (1) is installed on the outer side wall of the transformer casing (1). (2), characterized in that the transformer casing (1) includes a casing body (101) and a cover plate (102) that is covered on the upper end face of the casing body (101), and each of the casing bodies (101) The outer side walls are provided with a plurality of radiating pipes (2) arranged in parallel, and the upper and lower end surfaces of the housing body (101) are respectively provided with an upper annular groove (103) with an opening facing upward and a downward opening and a lower surface. The annular groove (104) forms two parallel passages inside the heat pipe (2), which are an oil passage passage (201) and a water passage passage (202) respectively, and the upper and lower ends of the oil passage passage (201) are respectively connected to the transformer shell. The upper and lower ends of the side walls of the body (1) are connected and communicated with the interior of the transformer housing (1), and the upper and lower ends of the water passage (202) are respectively communicated with the upper annular groove (103) and the lower annular groove (104) . 2. An outdoor transformer according to claim 1, characterized in that: the bottom of the transformer housing (1) is further provided with a base (3), and the base (3) is a groove with a cavity inside and an open upper end The upper end face of the side wall of the base (3) is sealedly connected with the lower end face of the transformer housing (1), and the upper end face of the side wall of the base (3) is also provided with an upward facing opening opposite to the lower annular groove (104). The base annular groove (301) is in communication with the cavity inside the base (3). 3. An outdoor transformer according to claim 2, characterized in that: a water inlet pipe (302) communicating with the cavity inside the base (3) is provided on the side wall of the base (3), and the water inlet pipe (302) is provided on the side wall of the base (3). A water inlet valve (303) is provided, and the upper end surface of the housing body (101) is a stepped surface that is high on the inside and low on the outside, and the stepped surface includes an inner first end surface (105) and an outer second end surface (106) An annular gap (107) is formed between the lower surface of the cover plate (102) and the second end surface (106), and the upper annular groove (103) is arranged on the second end surface (106) and communicates with the annular gap (107). 4. An outdoor transformer according to claim 3, characterized in that: the first end face (105) is provided with a first annular bump (108), and the lower surface of the cover plate (102) is provided with a first annular bump (108) for the first The annular groove into which the annular projection (108) snaps. 5 . The outdoor transformer according to claim 4 , wherein a sealing gasket is provided between the first annular bump ( 108 ) and the annular groove. 6 . 6. An outdoor transformer according to claim 4, characterized in that: the lower surface of the cover plate (102) is further provided with a second annular projection (109) extending downward, and the second annular projection (109) ) is an interference fit with the inner sidewall of the housing body (101). 7. An outdoor transformer according to claim 2, characterized in that: a water outlet pipe (304) communicated with the cavity inside the base (3) is provided on the side wall of the base (3), and the water outlet pipe (304) is provided on the side wall of the base (3). A water outlet valve (305) is provided. 8. An outdoor transformer according to claim 2, characterized in that: a cavity inside the base (3) is provided with a plurality of partitions (306) for dividing the cavity into a plurality of compartments. The lower end of the plate (306) is fixed on the lower bottom surface of the base (3), and the height of the upper end is lower than the depth of the cavity.

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