阅读说明：本技术 一种自生长式防水淹变压器 (Self-growing type water flooding prevention transformer ) 是由 周小洁 于 2021-07-30 设计创作，主要内容包括：本发明公开了一种自生长式防水淹变压器,属于变压器领域,本发明通过渗水条自下而上感受并吸收外界打落在防护外壳侧端的雨水,使得膨胀推球遇水发生膨胀,将上方未膨胀的膨胀推球推动至防水布的内侧,继而对内置球产生挤压,使内置球和撑长杆带动防水布向外生长延伸,从而实现根据雨水大小和方向相应提高对变压器本体的防水效果,并且,本发明通过导热片将变压器本体产生的热量传递至膨胀推球和渗水条,一方面实现了通过变压器本体的热量使膨胀推球和渗水条上水分的快速蒸发,恢复干燥状态,另一方面又实现利用雨水更好地对变压器本体实现散热,二者相辅相成,相互良性促进,从而使本发明兼具了良好的防雨水性能和散热性能。(The invention discloses a self-growing type waterproof transformer, belonging to the field of transformers, wherein a water seepage strip senses and absorbs rainwater falling on the side end of a protective shell from the outside from bottom to top, so that an expansion push ball expands when encountering water, pushes the upper unexpanded expansion push ball to the inner side of waterproof cloth, and then extrudes an internal ball, so that the internal ball and a support rod drive the waterproof cloth to grow and extend outwards, thereby correspondingly improving the waterproof effect on a transformer body according to the size and the direction of the rainwater, moreover, the invention transmits heat generated by the transformer body to the expansion push ball and the water seepage strip through a heat conducting sheet, on one hand, the rapid evaporation of water on the expansion push ball and the water seepage strip is realized through the heat of the transformer body, the drying state is recovered, on the other hand, the heat dissipation of the transformer body is realized better by utilizing the rainwater, and the two supplement each other, the method promotes each other, so that the invention has good rain-proof performance and heat dispersion performance.)

1. The utility model provides a from waterproof transformer that floods of growth formula, includes transformer body (1), the outside of transformer body (1) is equipped with protecting sheathing (2), the lower extreme of transformer body (1) and the inner bottom fixed connection of protecting sheathing (2), its characterized in that: the top end of the protective housing (2) is provided with a chute (201), the lower inner wall of the chute (201) is provided with a plurality of uniformly distributed vertical grooves (202), the chute (201) is positioned on the upper side of the protective housing (2), the vertical grooves (202) are positioned on the outer side of the transformer body (1), the inside of the chute (201) is provided with a waterproof cloth (3), the lower end of the waterproof cloth (3) is fixedly connected to the lower inner wall of the chute (201), the upper end of the waterproof cloth (3) is fixedly connected with a plurality of uniformly distributed main guide blocks (301), the chute (201) is far away from the inner wall of the notch and is fixedly connected with a magnetic sheet (10), the main guide blocks (301) and the magnetic sheet (10) are in mutual contact, one end of the two, which is close to each other, is a heteropole, the inner surface of the waterproof cloth (3) is fixedly connected with a plurality of uniformly distributed limit bars (6), the inner side of the waterproof cloth (3) is provided with a plurality of groups of built-in balls (4), a plurality of groups of built-in balls (4) and a plurality of groups of limit strips (6) are evenly distributed at intervals, a plurality of stay bars (5) are arranged on the inner side of the waterproof cloth (3), the stay bars (5) are respectively positioned on four sides of the transformer body (1), the stay bar (5) is positioned at the outer side of the built-in ball (4), one end of the stay bar (5) close to the built-in ball (4) is fixedly connected with a supporting inclined plate (12), one end of the supporting sloping plate (12) far away from the supporting rod (5) is fixedly connected with an auxiliary guide block (1201), the auxiliary guide block (1201) is contacted with the magnetic sheet (10), one end of the vertical groove (202) is opposite to the other end, a plurality of expansion push balls (7) are arranged in the vertical groove, erect groove (202) and keep away from the inner wall of transformer body (1) and seted up with external communicating infiltration passageway, the inside fixedly connected with infiltration strip of infiltration passageway.

2. The self-growing flood-proof transformer of claim 1, wherein: the distance between two adjacent groups of limiting strips (6) is 1.3-1.5 times of the diameter of the built-in ball (4), the distance between a pair of horizontally adjacent limiting strips (6) in the same group is 0.4-0.6 times of the diameter of the built-in ball (4), and the vertical distance between a pair of limiting strips (6) on the same vertical plane in the same group is positioned between the diameter of the stay bar (5) and the diameter of the built-in ball (4).

3. The self-growing flood-proof transformer of claim 1, wherein: the lower inner wall fixedly connected with of chute (201) hinders ball frame (9), hinder ball frame (9) and be located the inboard of a plurality of vertical slots (202), and hinder ball frame (9) and be located the downside that supports swash plate (12), hinder the inner fixedly connected with of ball frame (9) and many to evenly distributed's locating plate (11), it is many right locating plate (11) are located a plurality of under supporting swash plate (12) respectively, vice guide block (1201) sliding connection is between a pair of locating plate (11).

4. The self-growing flood-proof transformer of claim 1, wherein: the water seepage strip comprises a pair of sizing nets (81) fixedly connected to the inner wall of the water seepage channel, and water absorption cotton (82) is fixedly connected between the sizing nets (81).

5. The self-growing flood-proof transformer of claim 1, wherein: the inner wall fixedly connected with of protective housing (2) a plurality of evenly distributed's conducting strip (13), conducting strip (13) run through the inside of protective housing (2) and extend to on the inner wall of erecting groove (202).

6. The self-growing flood-proof transformer of claim 1, wherein: a plurality of ball grooves which are uniformly distributed are formed in the upper end and the lower end of the main guide block (301) and the auxiliary guide block (1201), balls are rotatably connected inside the ball grooves, and the diameters of the balls are smaller than the hole diameters of the grooves.

7. The self-growing flood-proof transformer of claim 1, wherein: the expansion push ball (7) is made of water-swelling rubber.

8. The self-growing flood-proof transformer of claim 1, wherein: the lower end of the waterproof cloth (3) and the built-in ball (4) are both located on one side, away from the transformer body (1), of the vertical groove (202), and the initial diameter of the expansion push ball (7) is the same as that of the built-in ball (4).

9. The self-growing flood-proof transformer of claim 1, wherein: the chutes (201) are distributed obliquely upwards along the periphery towards the center direction.

Technical Field

The invention relates to the field of transformers, in particular to a self-growing type flooding-proof transformer.

Background

A transformer is a device that converts alternating current, alternating current circuit and characteristic impedance. When an ac circuit is provided in the primary electromagnetic coil, the iron core (or iron core) will communicate with the ac magnetic flux, and further generate the operating voltage (or current) in the secondary electromagnetic coil. The following categories are used according to the main purposes: power engineering transformers, special transformers (furnace wall transformers, rectifier transformers, direct current experimental transformers, voltage regulators, mine transformer preventers, etc.).

The waterproof transformer has waterproof function, and has special protecting casing to protect against high temperature, humidity, rain, water soaking and other harsh environment.

When the outdoor waterproof transformer is used outdoors, the requirements of good heat dissipation performance, water resistance, high temperature resistance, cold resistance, ultraviolet resistance and the like are required due to the large environmental factor change, the outdoor waterproof transformer can prevent water because the outdoor waterproof transformer is provided with a special protective shell, and the IP protection level is high, so that generally, when the transformer is required to have a certain level of waterproof function, the outer protective shell needs a certain sealing performance, so that the transformer has waterproof capability, but the heat dissipation performance is extremely poor, and the existing waterproof transformer is difficult to realize the waterproof performance and the good heat dissipation performance.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a self-growing type water flooding prevention transformer, which can sense and absorb external rainwater falling on the side end of a protective shell from bottom to top through a water seepage strip, so that an expansion push ball expands when encountering water, pushes the upper unexpanded expansion push ball to the inner side of waterproof cloth, extrudes an internal ball, and drives the waterproof cloth to grow outwards and extend according to the size and direction of the rainwater, thereby correspondingly improving the waterproof effect on a transformer body, and the invention transmits heat generated by the transformer body to the expansion push ball and the water seepage strip through a heat conducting sheet, on one hand, the heat of the transformer body is utilized to quickly evaporate water on the expansion push ball and the water seepage strip to restore the dry state, on the other hand, the heat dissipation of the transformer body is better realized by utilizing the rainwater, the two materials complement each other and are mutually beneficial to promote, so that the waterproof heat-dissipating structure has good waterproof performance and heat-dissipating performance, namely the working performance of the waterproof heat-dissipating structure is guaranteed, and the service life of the waterproof heat-dissipating structure is greatly prolonged.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A self-growing type flooding-proof transformer comprises a transformer body, wherein a protective shell is arranged on the outer side of the transformer body, the lower end of the transformer body is fixedly connected with the inner bottom end of the protective shell, a chute is formed in the top end of the protective shell, a plurality of uniformly distributed vertical grooves are formed in the lower inner wall of the chute, the chute is positioned on the upper side of the protective shell, the vertical grooves are positioned on the outer side of the transformer body, waterproof cloth is arranged inside the chute, the lower end of the waterproof cloth is fixedly connected to the lower inner wall of the chute, a plurality of uniformly distributed main guide blocks are fixedly connected to the upper end of the waterproof cloth, magnetic sheets are fixedly connected to the inner wall, away from a notch, of the chute, the main guide blocks are in contact with the magnetic sheets, one end, close to each other, of the main guide blocks and the magnetic sheets is a heteropole, and a plurality of groups of uniformly distributed limiting bars are fixedly connected to the inner surface of the waterproof cloth, the inner side of the waterproof cloth is provided with a plurality of groups of built-in balls, the groups of built-in balls and a plurality of groups of limiting strips are evenly distributed at intervals, the inner side of the waterproof cloth is also provided with a plurality of supporting rods, the supporting rods are respectively positioned on four sides of the transformer body and positioned on the outer sides of the built-in balls, one end of each supporting rod, which is close to the built-in ball, is fixedly connected with a supporting inclined plate, one end of each supporting inclined plate, which is far away from the corresponding supporting rod, is fixedly connected with an auxiliary guide block, the auxiliary guide block and the magnetic sheets are mutually contacted, the end, which is close to the auxiliary guide block and the magnetic sheets, is a heteropole, a plurality of expansion push balls are arranged inside the vertical groove, the inner wall, which is far away from the transformer body, of the vertical groove is provided with a water seepage channel communicated with the outside, and the water seepage strip is fixedly connected inside the water seepage channel, the waterproof cloth senses and absorbs rainwater falling on the side end of the protective shell from the outside from the bottom to the top through the water seepage strip, so that the expansion push balls expand when encountering water, the invention pushes the unexpanded expansion push ball to the inner side of the waterproof cloth, and then extrudes the built-in ball, so that the built-in ball and the stay bar drive the waterproof cloth to grow outwards and extend, thereby realizing the corresponding improvement of the waterproof effect on the transformer body according to the size and the direction of rainwater.

Further, the distance between two adjacent groups of limiting strips is 1.3-1.5 times of the diameter of the built-in ball, namely: the built-in ball can pass through between two adjacent groups of limiting strips, and the distance between a pair of the limiting strips which are horizontally adjacent in the same group is 0.4-0.6 times of the diameter of the built-in ball, namely: the built-in ball can not enter between a horizontal pair of limiting strips, and the two size limitations are combined, so that the built-in ball and the expansion push ball can smoothly and stably move between two adjacent groups of limiting strips in a linear shape, and the movement of the built-in ball and the expansion push ball is not easy to deviate, misplace and the like, so that the stay bar can be smoothly pushed outwards, and the waterproof cloth can be ensured to smoothly grow and extend outwards; the vertical distance between the limiting strips is located between the diameter of the stay bar and the diameter of the built-in ball, so that the waterproof cloth is in the outward growth extension process, the stay bar can smoothly move between the interlayer of the upper inner wall and the interlayer of the waterproof cloth, and the built-in ball can further stably roll in a linear shape and is not easy to enter between the upper limiting strip and the lower limiting strip.

Furthermore, the lower inner wall of the chute is fixedly connected with a ball blocking frame which is positioned at the inner side of the plurality of vertical grooves and is positioned at the lower side of the supporting inclined plate, the rolling direction of the expansion pushball can be limited by the ball stopping frame, so that the expansion pushball can move towards the direction close to the built-in ball after moving out from the notch of the vertical groove, namely, the built-in ball is pushed outwards, the inner end of the ball blocking frame is fixedly connected with a plurality of pairs of positioning plates which are uniformly distributed, the plurality of pairs of positioning plates are respectively positioned right under the plurality of supporting inclined plates, the auxiliary guide block is connected between the pair of positioning plates in a sliding way, the limit of the auxiliary guide block can be realized through the pair of positioning plates, so that the auxiliary guide block moves linearly along the inner sides of the pair of positioning plates, thereby realize spacing to supporting the swash plate and propping the stock, guarantee to prop the stock and to the design effect of tarpaulin, guarantee the growth extension process of tarpaulin to four sides promptly.

Furthermore, the water seepage strip comprises a pair of sizing nets fixedly connected to the inner wall of the water seepage channel, water absorption cotton is fixedly connected between the sizing nets, when external rainwater falls on the side end of the transformer body (due to a rain shielding structure at the top of the transformer body, the lower half position of the transformer body is firstly wetted), the rainwater enters the water absorption cotton to be absorbed and stored, and the expansion push ball rapidly expands after contacting the moisture in the water absorption cotton, so that the expansion push ball which is not expanded above is pushed upwards.

Further, a plurality of evenly distributed's of inner wall fixedly connected with of protective housing's conducting strip, the conducting strip runs through protective housing's inside and extends to on the inner wall of erecting the groove, can derive the heat that produces the transformer body to erecting the inslot with higher speed through the conducting strip, make and erect the inslot temperature rising to the heat that produces through the transformer body realizes the inflation and pushes away the ball and absorb water the quick evaporation of cotton moisture that goes up, make the transformer body restore the drying fast by the part that the rainwater was drenched on the one hand, on the other hand utilizes the rainwater to realize the heat dissipation to the transformer body better again, the two complements each other, each other's benign promotion.

Further, a plurality of evenly distributed's ball grooves have all been seted up at the upper and lower both ends of main guide block and vice guide block, the inside rotation of ball groove is connected with the ball, the diameter of ball is less than the notch aperture of ball groove, can reduce the friction of main guide block and vice guide block between removal in-process and chute inner wall through the ball to make main guide block and vice guide block move more smoothly.

Furthermore, the expansion pushing ball is made of water-swelling rubber, and has the performance of common rubber products and the performance of self-swelling when meeting water.

Furthermore, the lower end of the waterproof cloth and the built-in ball are both located on one side, away from the transformer body, of the vertical groove, the initial diameter of the expansion push ball is the same as that of the built-in ball, when the expansion push ball below expands first, the expansion push ball above is pushed upwards and enters the inner side of the waterproof cloth, and then the built-in ball is extruded.

Further, the chute is distributed in an oblique upward direction to the central direction along the periphery, on one hand, the built-in ball and the expansion pushing ball can be conveniently moved outwards, on the other hand, the waterproof cloth can grow and extend downwards in an oblique direction, and the rainproof effect on the side end of the transformer body is more conveniently realized.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) the scheme makes the expansion push ball expand when meeting water by the water seepage strip sensing from bottom to top and absorbing rainwater falling on the side end of the protective shell from the outside, pushes the expansion push ball which is not expanded above to the inner side of the waterproof cloth, and then extrudes the built-in ball, so that the built-in ball and the supporting rod drive the waterproof cloth to grow outwards and extend, thereby realizing the corresponding improvement of the waterproof effect on the transformer body according to the size and the direction of the rainwater, and the invention transmits the heat generated by the transformer body to the expansion push ball and the water seepage strip through the heat conducting sheet, on one hand, the invention realizes the rapid evaporation of the moisture on the expansion push ball and the water seepage strip through the heat of the transformer body, and the recovery of the dry state, on the other hand, the invention realizes the heat dissipation on the transformer body better by utilizing the rainwater, and the two supplement each other and promote each other, thereby having good rainwater resistance and heat dissipation performance, the working performance of the invention is ensured, and the service life is greatly prolonged.

(2) The distance between two adjacent groups of limiting strips is 1.3-1.5 times of the diameter of the built-in ball, namely: the built-in ball can pass through between two adjacent groups of limiting strips, and the distance between a pair of horizontally adjacent limiting strips in the same group is 0.4-0.6 times of the diameter of the built-in ball, namely: the built-in ball can not enter between a horizontal pair of limiting strips, and the two size limitations are combined, so that the built-in ball and the expansion push ball can smoothly and stably move between two adjacent groups of limiting strips in a linear shape, and the movement of the built-in ball and the expansion push ball is not easy to deviate, misplace and the like, so that the stay bar can be smoothly pushed outwards, and the waterproof cloth can be ensured to smoothly grow and extend outwards; perpendicular distance between a pair of spacing on same vertical plane is located between the diameter of propping the pole and the diameter of built-in ball in same group for the tarpaulin is outwards growing and extends the in-process, and the pole that props can move smoothly between the upper and lower inner wall intermediate layer of tarpaulin, also makes built-in ball further stably be and is the line type form roll simultaneously, is difficult for getting into between a pair of spacing from top to bottom.

(3) The lower inner wall fixedly connected with of chute hinders the ball frame, it is located the inboard in a plurality of vertical slots to hinder the ball frame, and hinder the downside that the ball frame is located the support swash plate, can restrict the roll direction of inflation push ball through hindering the ball frame, make inflation push ball follow vertical slot notch shift out the back, can remove to the direction that is close to built-in ball, realize pushing built-in ball outside promptly, it is many to evenly distributed's locating plate to hinder the inner fixedly connected with of ball frame, it is located a plurality of under sides that support the swash plate respectively to a plurality of pairs of locating plates, vice guide block sliding connection is between a pair of locating plate, can realize spacing to vice guide block through a pair of locating plate, make vice guide block do rectilinear movement along a pair of locating plate inboard, thereby realize spacing to supporting swash plate and bracing stock, guarantee the design effect of bracing stock to the tarpaulin, guarantee the growth extension process to four sides promptly.

(4) The water seepage strip comprises a pair of sizing nets fixedly connected to the inner wall of the water seepage channel, water absorption cotton is fixedly connected between the pair of sizing nets, when external rainwater falls on the side end of the transformer body (due to a rain shading structure at the top of the transformer body, the lower half position of the transformer body is firstly wetted), the rainwater enters the water absorption cotton to be absorbed and stored, and the expansion push ball rapidly expands after contacting with the moisture in the water absorption cotton, so that the expansion push ball which is not expanded above is pushed upwards.

(5) Protective housing's a plurality of evenly distributed's of inner wall fixedly connected with conducting strip, the conducting strip runs through protective housing's inside and extends to on the inner wall of erecting the groove, can derive the heat that produces the transformer body with higher speed to erecting the inslot through the conducting strip, make and erect the temperature rise in the groove, thereby realize the inflation through the heat that the transformer body produced and push away the quick evaporation of moisture on ball and the cotton that absorbs water, make the part fast recovery drying that the transformer body was drenched by the rainwater on the one hand, on the other hand utilizes the rainwater to realize the heat dissipation to the transformer body better again, the two complements each other, each other is benign to promote.

(6) The upper and lower both ends of main guide block and vice guide block all set up a plurality of evenly distributed's ball groove, and the inside rotation of ball groove is connected with the ball, and the diameter of ball is less than the notch aperture of ball groove, can reduce main guide block and vice guide block through the ball and remove the in-process and chute inner wall within a definite time friction to make main guide block and vice guide block remove more smoothly.

(7) The lower extreme of tarpaulin and built-in ball all are located the one side that the transformer body was kept away from to the vertical trough, and the initial diameter of inflation pushball is the same with the diameter of built-in ball, and after the inflation pushball of below took place the inflation earlier, the inflation pushball of top was upwards promoted and is gone into the inboard of tarpaulin, produces the extrusion to built-in ball then.

(82) The chute is along being the distribution in the slant to central direction all around, can make things convenient for built-in ball and inflation pushing ball to outwards remove on the one hand, and on the other hand makes the tarpaulin can realize that the slant grows down and extends, is more convenient for realize the rain-proof effect to transformer body side.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a vertical cross-sectional view of the present invention at a pre-inner ball position of use;

FIG. 3 is a schematic view of the structure at A in FIG. 2;

FIG. 4 is a schematic view of the structure at B in FIG. 2;

FIG. 5 is a vertical cross-sectional view at the support ramp prior to use of the present invention;

FIG. 6 is a schematic view of the structure at C in FIG. 5;

FIG. 7 is a schematic view of the structure of FIG. 5 at D;

FIG. 8 is a vertical cross-section of the present invention at the inner sphere during growth elongation;

FIG. 9 is a vertical sectional view of the present invention at the supporting inclination plate during the growth elongation process;

FIG. 10 is a perspective view of the ball blocking frame and the positioning plate of the present invention;

FIG. 11 is a schematic side view of the present invention with the built-in ball and the position-limiting strip inside the tarpaulin;

FIG. 12 is a schematic top view of the present invention with the built-in ball and the position-limiting strip inside the tarpaulin;

FIG. 13 is a schematic top view of the internal structure of the chute of the present invention prior to use;

FIG. 14 is a schematic top view of the structure of the inner structure of the chute during growth and elongation process according to the present invention.

The reference numbers in the figures illustrate:

1 transformer body, 2 protective casings, 201 skewed slots, 202 vertical slots, 3 waterproof cloth, 301 main guide blocks, 4 built-in balls, 5 stay bars, 6 limit bars, 7 expansion push balls, 81 sizing nets, 82 absorbent cotton, 9 ball blocking frames, 10 magnetic sheets, 11 positioning plates, 12 support inclined plates, 1201 auxiliary guide blocks and 13 heat conducting sheets.

Detailed Description

The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

referring to fig. 1 and 2, a self-growing flooding-proof transformer includes a transformer body 1, a protective casing 2 is disposed on an outer side of the transformer body 1, a lower end of the transformer body 1 is fixedly connected to an inner bottom end of the protective casing 2, referring to fig. 2 and 3, a chute 201 is disposed at a top end of the protective casing 2, a plurality of uniformly distributed vertical slots 202 are disposed on a lower inner wall of the chute 201, the chute 201 is located on an upper side of the protective casing 2, the vertical slots 202 are located on an outer side of the transformer body 1, a waterproof cloth 3 is disposed inside the chute 201, a lower end of the waterproof cloth 3 is fixedly connected to a lower inner wall of the chute 201, referring to fig. 4, a plurality of uniformly distributed main guide blocks 301 are fixedly connected to an upper end of the waterproof cloth 3, a magnetic sheet 10 is fixedly connected to an inner wall of the chute 201 far from a slot opening, the main guide blocks 301 and the magnetic sheet 10 are in contact with each other, and one end of the two close to each other is heteropolar.

Referring to fig. 11 and 12, a plurality of groups of evenly distributed position-limiting strips 6 are fixedly connected to the inner surface of the waterproof cloth 3, a plurality of groups of built-in balls 4 are arranged on the inner side of the waterproof cloth 3, the plurality of groups of built-in balls 4 and the plurality of groups of position-limiting strips 6 are evenly distributed at intervals, three groups of built-in balls 4 are provided, four stay rods 5 are further arranged on the inner side of the waterproof cloth 3, referring to fig. 13 and 14, the four stay rods 5 are respectively positioned on four sides of the transformer body 1, the stay rods 5 are positioned on the outer side of the built-in balls 4, one end of each stay rod 5 close to the built-in ball 4 is fixedly connected with a support sloping plate 12, one end of each support sloping plate 12 far away from the stay rod 5 is fixedly connected with an auxiliary guide block 1201, the auxiliary guide block 1201 and the magnetic sheet 10 are in contact with each other, and one end close to each other is heteropolar, the support of the waterproof cloth 3 is realized by the stay rods 5 and the support sloping plate 12, so that the waterproof cloth 3 can grow and extend outwards, thereby realizing the rainproof function to the side end of the transformer body 1.

Referring to fig. 12, the distance between two adjacent sets of the spacing bars 6 is 1.4 times the diameter of the built-in ball 4, that is: built-in ball 4 can pass through between two sets of adjacent spacing strips 6, and the interval between the adjacent pair of spacing strips 6 of level is 0.5 times of built-in ball 4 diameter in same group, promptly: the built-in ball 4 can not enter between the pair of horizontal limiting strips 6, and the two size limits are integrated, so that the built-in ball 4 and the expansion push ball 7 smoothly and stably move between the two adjacent groups of limiting strips 6 in a linear shape, and the movement of the built-in ball 4 and the expansion push ball 7 is not easy to deviate, misplace and the like, thereby smoothly pushing the stay bar 5 outwards and ensuring that the waterproof cloth 3 smoothly grows and extends outwards; referring to fig. 3, the vertical distance between the pair of position-limiting strips 6 on the same vertical plane in the same group is located between the diameter of the stay bar 5 and the diameter of the built-in ball 4, so that the stay bar 5 can smoothly move between the upper and lower inner wall interlayers of the tarpaulin 3 during the outward growth and extension process of the tarpaulin 3, and the built-in ball 4 can further stably roll in a linear shape and is not easy to enter between the upper and lower pair of position-limiting strips 6.

Referring to fig. 3, a plurality of expansion pushballs 7 are disposed inside the vertical groove 202, and the expansion pushballs 7 are made of water-swellable rubber, which has the performance of both general rubber products and water-swellable performance; the lower end of the waterproof cloth 3 and the built-in ball 4 are both positioned at one side of the vertical groove 202 far away from the transformer body 1, the initial diameter of the expansion push ball 7 is the same as the diameter of the built-in ball 4, the inner wall of the vertical groove 202 far away from the transformer body 1 is provided with a water seepage channel communicated with the outside, the inside of the water seepage channel is fixedly connected with a water seepage strip, the water seepage strip comprises a pair of shaped nets 81 fixedly connected to the inner wall of the water seepage channel, a water absorbent cotton 82 is fixedly connected between the pair of shaped nets 81, when external rainwater falls on the side end of the transformer body 1 (because of a rain shielding structure at the top of the transformer body 1, the lower half part of the transformer body 1 is firstly wetted, the rainwater enters the water absorbent cotton 82 to be absorbed and stored, the expansion push ball 7 rapidly expands after contacting the water in the water absorbent cotton 82, so as to push the expansion push ball 7 which is not expanded above upwards and enters the inner side of the waterproof cloth 3, then, the built-in ball 4 is extruded, so that the waterproof cloth 3 grows and extends outwards, and accordingly the outer side of the protective shell 2 is rainproof according to the size and the direction of rainwater.

Referring to fig. 3 and 13, the lower inner wall of the chute 201 is fixedly connected with a ball blocking frame 9, the ball blocking frame 9 is located at the inner side of the plurality of vertical grooves 202, the ball blocking frame 9 is located at the lower side of the supporting inclined plates 12, the rolling direction of the expansion push ball 7 can be limited by the ball blocking frame 9, the expansion push ball 7 can move towards the direction close to the built-in ball 4 after moving out of the notch of the vertical groove 202, i.e. the built-in ball 4 is pushed outwards, the inner end of the ball blocking frame 9 is fixedly connected with four pairs of evenly distributed positioning plates 11, the four pairs of positioning plates 11 are respectively located at the right lower sides of the four supporting inclined plates 12, the auxiliary guide block 1201 is slidably connected between the pair of positioning plates 11, the limitation of the auxiliary guide block 1201 can be realized by the pair of positioning plates 11, the auxiliary guide block 1201 is linearly moved along the inner sides of the pair of positioning plates 11, so that the limitation of the supporting inclined plates 12 and the supporting rods 5 is realized, and the shaping effect of the supporting rods 5 on the waterproof cloth 3 is ensured, i.e. to ensure the process of growing and extending the tarpaulin 3 to four sides.

Please refer to fig. 8, the inner wall of the protective housing 2 is fixedly connected with a plurality of evenly distributed heat conducting fins 13, the heat conducting fins 13 penetrate through the inner part of the protective housing 2 and extend to the inner wall of the vertical groove 202, the heat generated by the transformer body 1 can be led out to the vertical groove 202 with higher speed through the heat conducting fins 13, so that the temperature in the vertical groove 202 is raised, thereby the heat generated by the transformer body 1 is used for realizing the rapid evaporation of the moisture on the expansion push ball 7 and the absorbent cotton 82, on one hand, the part of the transformer body 1 wetted by the rainwater is rapidly recovered to be dry, on the other hand, the rainwater is used for better realizing the heat dissipation of the transformer body 1, and the two are complementary and mutually beneficial.

Please refer to fig. 4 and 7, a plurality of ball grooves are uniformly distributed at the upper and lower ends of the main guide block 301 and the auxiliary guide block 1201, the inside of the ball groove is rotatably connected with balls, the diameter of the balls is smaller than the aperture of the opening of the ball groove, the friction between the main guide block 301 and the auxiliary guide block 1201 and the inner wall of the chute 201 during the moving process can be reduced by the balls, so that the main guide block 301 and the auxiliary guide block 1201 can move more smoothly, the chute 201 is distributed obliquely upwards along the periphery to the central direction, on one hand, the built-in ball 4 and the expansion push ball 7 can move outwards, on the other hand, the waterproof cloth 3 can grow and extend obliquely downwards, and the rainproof effect on the side end of the transformer body 1 can be realized more conveniently.

The invention senses and absorbs external rainwater falling on the side end of the protective shell 2 from bottom to top through the water seepage strip, so that the expansion push ball 7 expands when encountering water, the expansion push ball 7 which is not expanded above is pushed to the inner side of the waterproof cloth 3, and then the built-in ball 4 is extruded, so that the built-in ball 4 and the support rod 5 drive the waterproof cloth 3 to grow and extend outwards, thereby correspondingly improving the waterproof effect on the transformer body 1 according to the size and the direction of the rainwater, and the invention transmits the heat generated by the transformer body 1 to the expansion push ball 7 and the water seepage strip through the heat conducting sheet 13, on one hand, the rapid evaporation of the moisture on the expansion push ball 7 and the water seepage strip is realized through the heat of the transformer body 1, the drying state is recovered, on the other hand, the heat dissipation of the transformer body 1 is realized better by utilizing the rainwater, the heat dissipation of the expansion push ball 7 and the water seepage strip are supplemented, the good promotion of each other hand, thereby the invention has good rainwater resistance and heat dissipation performance, the working performance of the invention is ensured, and the service life is greatly prolonged.

The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.