阅读说明：本技术 一种具有高温防护功能的干式变压器 (Dry-type transformer with high temperature safeguard function ) 是由 许文凤 于 2021-08-31 设计创作，主要内容包括：本发明公开了一种具有高温防护功能的干式变压器,属于干式变压器技术领域,一种具有高温防护功能的干式变压器,本方案中当变压器本体温度异常升高时,使得降温槽中的气体受热膨胀撑破预断裂层,此时冷却液进入降温槽中,可有效的对变压器本体进行临时的降温防护作用,延长了工作人员反应和操作时间,同时在温度升继续升高时,触发层会继续膨胀会对防护形变球进行挤压到一定程度后,预破层破裂后防护形变球中混合粉末和胶水原料会流出混合,并迅速聚合固化粘着,可以使得第一空腔内部变得更加的坚固,即提高了外护层的强度,进而提高了防护套的整体强度,可提高防护套的使用效果以及变压器本体使用时的安全性。(The invention discloses a dry-type transformer with high-temperature protection function, belonging to the technical field of dry-type transformers, the dry-type transformer with high-temperature protection function is characterized in that when the temperature of a transformer body abnormally rises, gas in a cooling tank is heated to expand to break a pre-breaking layer, at the moment, cooling liquid enters the cooling tank, the temporary cooling protection function can be effectively carried out on the transformer body, the reaction and operation time of workers is prolonged, meanwhile, when the temperature rises continuously, a trigger layer can continue to expand to extrude a protection deformation ball to a certain degree, mixed powder and glue raw materials in the protection deformation ball flow out and are mixed after the pre-breaking layer breaks, and the mixed powder and the glue raw materials are rapidly polymerized, solidified and adhered, so that the interior of a first cavity can be firmer, namely the strength of an outer protection layer is improved, and the overall strength of a protection sleeve is further improved, the use effect of the protective sleeve and the safety of the transformer body during use can be improved.)

1. The utility model provides a dry-type transformer with high temperature safeguard function, includes transformer body (1), its characterized in that: the outer wall of the transformer body (1) is sleeved with a protective sleeve (2), the protective sleeve (2) comprises a heat conduction layer (3), a trigger layer (4) and an outer protective layer (5), one end of the heat conduction layer (3) is attached to the outer wall of the transformer body (1), the trigger layer (4) is located between the heat conduction layer (3) and the outer protective layer (5), a plurality of first cavities (6) are formed in the outer protective layer (5), a plurality of protective deformation balls (7) are fixedly connected in the first cavities (6), a plurality of second cavities (8) are further formed in the trigger layer (4), a plurality of elastic membranes (9) are fixedly connected in the second cavities (8), a plurality of cooling grooves (10) are formed in one side, close to the heat conduction layer (3), of the trigger layer (4), the cooling grooves (10) are filled with gas, and a plurality of pre-breaking layers (11) are embedded in the inner wall of the trigger layer (4), pre-fracture layer (11) are located between second cavity (8) and cooling tank (10), and pre-fracture layer (11) position is corresponding with elastic membrane (9), it has the coolant liquid to fill between elastic membrane (9) and pre-fracture layer (11), protection deformation ball (7) are made by elastic material, two elastic interlayer (12), two of protection deformation ball (7) inside fixedly connected with elastic interlayer (12) will protect deformation ball (7) inside to separate into first deposit chamber (13), central cavity (14) and second and deposit chamber (15), first deposit chamber (13) and second deposit chamber (15) inside and pack respectively has mixed powder and glue raw materials, the equal gomphosis of lateral wall is connected with pre-fracture layer (16) about protection deformation ball (7), pre-fracture layer (16) outer wall fixedly connected with a plurality of spurs (17).

2. A dry-type transformer with high temperature protection function as claimed in claim 1, wherein: the left side is provided with four groups of the spurs (17) on the pre-breaking layer (16), the right side is provided with three groups of the spurs (17) on the pre-breaking layer (16), and the left side and the right side are mutually crossed with each other.

3. A dry-type transformer with high temperature protection function as claimed in claim 2, wherein: the mixed powder is prepared by mixing cement powder and carbon powder.

4. A dry-type transformer with high temperature protection function as claimed in claim 12, wherein: the mixed powder also contains a yellow pigment, and the mass ratio of the cement powder to the carbon powder to the colored pigment is as follows: 6: 3: 1.

5. a dry-type transformer with high temperature protection function as claimed in claim 1, wherein: a plurality of heat dissipation holes (18) are further formed in the outer wall of the outer protective layer (5), the trigger layer (4) and the inner wall of the outer protective layer (5) are connected with a plurality of heat conducting rods (19) in a combined embedding mode, one end of each heat conducting rod (19) is attached to the heat conducting layer (3), and the other end of each heat conducting rod (19) is communicated with the heat dissipation holes (18).

6. A dry-type transformer with high temperature protection function as claimed in claim 5, wherein: and a protective screen (20) is fixedly connected inside the heat dissipation hole (18).

7. A dry-type transformer with high temperature protection function as claimed in claim 1, wherein: the outer wall of heat-conducting layer (3) is seted up a plurality of restriction arc groove (21), restriction arc groove (21) are located cooling groove (10) inside.

8. A dry-type transformer with high temperature protection function as claimed in claim 7, wherein: the outer wall of heat-conducting layer (3) still fixedly connected with a plurality of restriction fine hair (22), restriction fine hair (22) are located cooling groove (10) inside and stagger with the position of restriction arc groove (21).

9. A dry-type transformer with high temperature protection function as claimed in claim 1, wherein: the interior of the central chamber (14) is filled with compressed gas.

Technical Field

The invention relates to the technical field of dry-type transformers, in particular to a dry-type transformer with a high-temperature protection function.

Background

A transformer is a device that changes an alternating voltage using the principle of electromagnetic induction, and main components are a primary coil, a secondary coil, and an iron core (magnetic core). The main functions are as follows: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformer), and the like. The transformer is basic equipment for power transmission and distribution, and is widely applied to the fields of industry, agriculture, traffic, urban communities and the like.

The dry type transformer is a common transformer, and is generally used in places such as many people indoors, buildings, airports, mechanical equipment and the like, and is safer than an oil-immersed transformer.

When the conventional dry-type transformer works indoors, the temperature of the dry-type transformer is increased abnormally sometimes due to short circuit of a transformer winding and an iron core or long-time load operation, serious accidents such as damage and even burning of the dry-type transformer can be caused due to too high temperature and untimely treatment, at present, after the temperature of the dry-type transformer is increased and found by workers, the dry-type transformer cannot be treated for enough time due to a temporary protection function, the service life of the dry-type transformer is greatly shortened, and the serious accidents can also occur. Therefore, a dry-type transformer with a high temperature protection function is proposed to solve the above problems.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a dry-type transformer with a high-temperature protection function, in the scheme, when the temperature of a transformer body rises abnormally, gas in a cooling groove can expand by heating to burst a pre-fracture layer, at the moment, elastic film cooling liquid in a second cavity bounces into the cooling groove to cool the cooling groove and a heat conduction layer, the temporary cooling protection function can be effectively carried out on the transformer body, the reaction and operation time of workers is prolonged, more serious accidents caused by overhigh temperature of the transformer body are greatly reduced, meanwhile, when the temperature of the transformer body rises quickly or continuously rises, a trigger layer can continue to expand to extrude a protection deformation ball in a first cavity to a certain degree, and then two side spurs on the protection deformation ball can puncture a pre-fracture layer on an adjacent protection deformation ball, mix powder and second and deposit the glue raw materials that the chamber was deposited to the first chamber of depositing in the protection deformation ball and can flow out and mix to the solidification is cohered rapidly, can be so that the inside firmer that becomes of first cavity, improved the intensity of outer jacket promptly, and then improved the bulk strength of lag, security when can improve the result of use of lag and transformer body use.

2. Technical scheme

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

A dry-type transformer with high-temperature protection function comprises a transformer body, wherein a protection sleeve is sleeved on the outer wall of the transformer body and comprises a heat conduction layer, a trigger layer and an outer protection layer, one end of the heat conduction layer is attached to the outer wall of the transformer body, the trigger layer is positioned between the heat conduction layer and the outer protection layer, a plurality of first cavities are formed in the outer protection layer, a plurality of protective deformation balls are fixedly connected in the first cavities, a plurality of second cavities are also formed in the trigger layer, a plurality of elastic membranes are fixedly connected in the second cavities, a plurality of cooling grooves are formed in one side, close to the heat conduction layer, of the trigger layer, gas is filled in the cooling grooves, a plurality of pre-fracture layers are connected in an embedded mode on the inner wall of the trigger layer, the pre-fracture layers are positioned between the second cavities and the cooling grooves, and the positions of the pre-fracture layers correspond to the elastic membranes, and cooling liquid is filled between the elastic membrane and the pre-fracture layer. When transformer body temperature risees unusually, the temperature passes to the cooling groove through the heat-conducting layer this moment, make the gas in the cooling groove be heated the thermal expansion certain degree and can strut the pre-fracture layer, the elastic membrane is in the cooling groove with the coolant liquid bullet, and contact the heat-conducting layer, thereby can cool down cooling groove and heat-conducting layer, contact 3 effectual carrying out interim cooling guard action to the transformer body of heat-conducting layer through a plurality of cooling groove, staff's reaction and operating time have been prolonged, very big reduction transformer body high temperature and produce more serious accident, the life of transformer body has been improved simultaneously.

Further, protection deformation ball is made by the elasticity material, two elasticity interlayers of the inside fixedly connected with of protection deformation ball, two elasticity interlayer will protect the deformation ball internal part and separate into first deposit chamber, central cavity and second and deposit the chamber, first deposit the chamber and the second is deposited the intracavity portion and is filled respectively and has mixed powder and glue raw materials, the equal gomphosis of lateral wall is connected with the layer of breaing in advance about the protection deformation ball, a plurality of spurs of the layer outer wall fixedly connected with of breaing in advance. When the temperature of the transformer body rises fast or continuously rises, the trigger layer can continue to expand at the moment, the expansion of the trigger layer can extrude the protection deformation ball in the first cavity, after the extrusion to a certain degree, the two side spurs on the protection deformation ball can contact the pre-breaking layers on the adjacent protection deformation balls, the pre-breaking layers on the protection deformation balls can be punctured by the adjacent spurs at the moment, the mixed powder in the first storage cavity in the protection deformation ball and the glue raw material in the second storage cavity can flow out, the glue raw material can be mixed with the cement powder, the carbon powder and the yellow pigment in the mixed powder, the glue raw material can be polymerized, cured and adhered rapidly by catalysis, the interior of the first cavity can be firmer, the strength of the outer protection layer is improved, the overall strength of the protective sleeve is further improved, the risk that the temperature of the transformer body is too high to cause the burst of the protective sleeve can be greatly reduced, the use effect of the protective sleeve and the safety of the transformer body during use can be improved.

Furthermore, the left side the bur on the layer of breaking in advance is equipped with four groups, and the right side the bur on the layer of breaking in advance is equipped with three groups, and the side of controlling the bur intercrossing sets up, can be so that when protection deformation ball received the extrusion, the adjacent layer of breaking in advance can all be punctureed to the bur of its both sides, and then has guaranteed that adjacent each protection deformation ball can all be punctured.

Furthermore, the mixed powder is prepared by mixing cement powder and carbon powder, and the cement powder and the carbon powder can be rapidly polymerized, cured and adhered when being mixed with the glue raw material, so that more ideal strength and hardness are achieved.

Further, the mixed powder also contains a yellow pigment, and the mass ratio of the cement powder to the carbon powder to the color pigment is as follows: 6: 3: 1, through mixing cement powder, carbon powder and yellow pigment according to certain proportion, can be so that solidify and reach higher hardness after mixing with the glue raw materials to through the mixture of yellow pigment, after above-mentioned mixture passes through 5 cracks of outer jacket and flows, can be directly perceived by the staff and observe, reach higher warning effect.

Further, a plurality of louvre has still been seted up to the outer jacket outer wall, the common gomphosis of trigger layer and outer jacket inner wall is connected with a plurality of heat conduction poles, the one end laminating heat-conducting layer of heat conduction pole, the heat conduction pole other end intercommunication louvre, the heat conduction pole can give off the heat that produces on the heat-conducting layer to the louvre in, finally gives off the external world, improves the radiating effect to the transformer body.

Further, the inside fixedly connected with of louvre protects the screen cloth, can greatly avoid some dust impurity etc. to enter into the louvre through the setting of protection screen cloth, greatly prevents to influence the heat conduction effect of heat-conducting rod and heat-conducting layer.

Furthermore, a plurality of restriction arc groove has been seted up to the outer wall of heat-conducting layer, inside the restriction arc groove was located the cooling groove, through the setting in restriction arc groove, can partly pile up in the restriction arc groove after the cooling liquid is popped into the cooling groove, can improve the outer wall contact time of cooling liquid and heat-conducting layer, and then improve the cooling effect to the transformer body.

Further, the outer wall of heat-conducting layer still a plurality of restriction fine hair of fixedly connected with, restriction fine hair is located cooling tank inside and staggers with the position of restriction arc groove, can collect and disturb coolant flow velocity to the coolant liquid that gets into the cooling tank through restriction fine hair, can make it further contact more time with the outer wall of heat-conducting layer.

Furthermore, the inside of the central cavity is filled with compressed gas, and the central cavity is filled with gas to improve the effect that the first storage cavity and the second storage cavity on the two sides expand towards the two sides.

3. Advantageous effects

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

(1) when transformer body temperature risees unusually in this scheme, can make the gas thermal expansion in the cooling groove, can strut the pre-splitting layer to the certain degree of inflation, the elastic membrane in the second cavity resumes initial form and plays the cooling groove with the inside coolant liquid of elastic membrane this moment, and contact the heat-conducting layer, thereby can cool down cooling groove and heat-conducting layer, can effectually carry out interim cooling guard action to the transformer body, staff's reaction and operating time have been prolonged, very big reduction transformer body high temperature and produce more serious accident, the life of transformer body has been improved simultaneously.

(2) When the temperature rise of transformer body is very fast or continue to rise in this scheme, trigger the layer this moment and can continue the inflation and can extrude the certain degree back to protection deformation ball, both sides on the protection deformation ball spurt can pierce through the layer of breaing in advance on the adjacent protection deformation ball, mix powder and glue raw materials and can flow out the mixture in the protection deformation ball this moment, and rapid polymerization solidification is cohered, can greatly improve the intensity of outer jacket, and then improved the bulk strength of lag, the too high risk that leads to bursting of lag of reduction transformer body temperature that can be very big, the result of use of lag and the security when transformer body uses can be improved.

(3) When the outer wall of the outer protective layer cracks and is communicated to the first cavity due to the fact that the temperature is too high, glue raw materials and mixed powder in the first cavity can enter the cracks and can flow out of the outer protective layer and be solidified and adhered, and therefore the cracks generated on the outer wall of the outer protective layer are repaired, and strength of the outer protective layer is improved.

(4) The outer wall glue raw materials of outer jacket and the mixed adhesive that mixes the powder can present striking yellow in this scheme, reaches higher warning effect, makes things convenient for the staff in time to observe the lag and has appeared the problem, has greatly reduced the more serious accident of appearing, has improved the life of transformer body.

(5) Can partly pile up in the restriction arc groove after the cooling liquid is gone into in the cooling groove in this scheme, can improve the outer wall contact time of cooling liquid and heat-conducting layer, and then improve the cooling effect to the transformer body, can collect and disturb the coolant flow velocity to the cooling liquid that gets into the cooling groove through restriction fine hair simultaneously, can make it further contact more time with the outer wall of heat-conducting layer.

(6) In the heat-conducting rod can give off the louvre with the heat that produces on the heat-conducting layer in this scheme, finally give off the external world, improve the radiating effect to the transformer body, can greatly avoid dust impurity etc. to enter into the louvre through setting up of protection screen cloth, very big prevent to influence the heat conduction effect of heat-conducting rod and heat-conducting layer.

Drawings

FIG. 1 is a schematic perspective view of the present invention from the axial side;

FIG. 2 is a rear view of the present invention;

FIG. 3 is a schematic top view, partially in section, of a protective cover of the present invention;

FIG. 4 is an enlarged view of the structure at A in FIG. 3;

FIG. 5 is a schematic top view, in section, in part, of another aspect of the protective enclosure of the present invention;

FIG. 6 is a schematic view of the internal structure of the protective sleeve of the present invention in a partial vertical cross-section;

FIG. 7 is a schematic view of the internal structure of the deformation-preventive ball of the present invention;

FIG. 8 is a schematic diagram of the elastic film morphology trigger after rupture of the rupture layer of the present invention;

FIG. 9 is a schematic structural view of the deformation-preventing ball of the present invention during pressing;

FIG. 10 is a schematic view of the shape structure of the deformed protective ball after being crushed and broken.

The reference numbers in the figures illustrate:

1. a transformer body; 2. a protective sleeve; 3. a heat conductive layer; 4. a trigger layer; 5. an outer jacket; 6. a first cavity; 7. protecting the deformation ball; 8. a second cavity; 9. an elastic film; 10. a cooling tank; 11. pre-breaking the layer; 12. an elastic interlayer; 13. a first storage chamber; 14. a central lumen; 15. a second storage chamber; 16. pre-breaking the layer; 17. bur protruding; 18. heat dissipation holes; 19. a heat conducting rod; 20. a protective screen; 21. a limiting arc groove; 22. the fluff is confined.

Detailed Description

This embodiment 1 will be described in conjunction with the disclosed figures 1-10;

the technical scheme is clearly and completely described, so that the purposes, the technical scheme and the beneficial effects of the embodiment of the disclosure are more clear. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" and similar words are intended to mean that the elements or items listed before the word cover the elements or items listed after the word and their equivalents, without excluding other elements or items. "upper", "lower", "inside", "outside", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Example (b):

referring to fig. 1-4 and fig. 6, a dry-type transformer with high temperature protection function comprises a transformer body 1, a protective sleeve 2 is sleeved on the outer wall of the transformer body 1, the protective sleeve 2 comprises a heat conduction layer 3, a trigger layer 4 and an outer protective layer 5, one end of the heat conduction layer 3 is attached to the outer wall of the transformer body 1, the trigger layer 4 is located between the heat conduction layer 3 and the outer protective layer 5, a plurality of first cavities 6 are formed in the outer protective layer 5, a plurality of protective deformation balls 7 are fixedly connected in the first cavities 6, a plurality of second cavities 8 are also formed in the trigger layer 4, a plurality of elastic membranes 9 are fixedly connected in the second cavities 8, a plurality of cooling grooves 10 are formed in one side of the trigger layer 4 close to the heat conduction layer 3, the cooling grooves 10 are filled with gas, a plurality of pre-fracture layers 11 are embedded in the inner wall of the trigger layer 4, and the pre-fracture layers 11 are located between the second cavities 8 and the cooling grooves 10, the pre-breaking layer 11 is positioned corresponding to the elastic membrane 9, and cooling liquid is filled between the elastic membrane 9 and the pre-breaking layer 11. When using, when transformer body 1 temperature risees unusually, the temperature passes to in the cooling groove 10 through heat-conducting layer 3 this moment, make the gas in the cooling groove 10 receive thermal expansion, can strut the pre-splitting layer 11 to the certain degree of inflation, elastic membrane 9 in the second cavity 8 loses the restriction back this moment, as shown in fig. 8, elastic membrane 9 resumes initial form and bounces the inside coolant liquid of elastic membrane 9 to the cooling groove 10, and contact heat-conducting layer 3, thereby can cool down cooling groove 10 and heat-conducting layer 3, contact heat-conducting layer 3 through a plurality of cooling groove 10 and can effectually carry out interim cooling guard action to transformer body 1, staff's reaction and operating time have been prolonged, very big reduction transformer body 1 high temperature and produce more serious accident, the life of transformer body 1 has been improved simultaneously.

Referring to fig. 4 and 7, the protective deformation ball 7 is made of an elastic material, two elastic interlayers 12 are fixedly connected inside the protective deformation ball 7, the protective deformation ball 7 is divided into a first storage cavity 13, a central cavity 14 and a second storage cavity 15 by the two elastic interlayers 12, compressed gas is filled inside the central cavity 14, the central cavity 14 is filled with gas to improve the effect that the first storage cavity 13 and the second storage cavity 15 on two sides expand towards two sides, the first storage cavity 13 and the second storage cavity 15 are respectively filled with mixed powder and glue raw materials, the mixed powder is cement powder and carbon powder is mixed, the cement powder and the carbon powder can be polymerized, cured and adhered quickly when mixed with the glue raw materials, and ideal strength and hardness are further achieved, the mixed powder further contains yellow pigment, and the mass ratio of the cement powder, the carbon powder and the colored pigment is as follows: 6: 3: 1, through mixing cement powder, carbon powder and yellow pigment according to certain proportion, can be so that solidify and reach higher hardness after mixing with the glue raw materials to through the mixture of yellow pigment, after above-mentioned mixture passes through 5 cracks of outer jacket and flows, can be directly perceived by the staff and observe, reach higher warning effect.

Referring to fig. 7 and 9-10, the left and right side walls of the protective deformation ball 7 are both embedded and connected with a pre-breaking layer 16, the outer wall of the pre-breaking layer 16 is fixedly connected with a plurality of spurs 17, four groups of spurs 17 are arranged on the left pre-breaking layer 16, three groups of spurs 17 are arranged on the right pre-breaking layer 16, and the left and right spurs 17 are arranged in a cross manner, so that when the protective deformation ball 7 is squeezed, the spurs 17 on both sides of the protective deformation ball can pierce the adjacent pre-breaking layer 16, thereby ensuring that each adjacent protective deformation ball 7 can be pierced, when the temperature of the transformer body 1 rises rapidly or continuously, the trigger layer 4 will continue to expand, the trigger layer 4 expands to squeeze the protective deformation ball 7 in the first cavity 6, as shown in fig. 9, when the temperature is squeezed to a certain degree, the spurs 17 on both sides of the protective deformation ball 7 can contact the pre-breaking layer 16 on the adjacent protective deformation ball 7, at this time, the pre-broken layer 16 on each protective deformation ball 7 is pierced by the adjacent spurs 17, as shown in fig. 10, at this time, the mixed powder in the first storage cavity 13 in the protective deformation ball 7 and the glue raw material in the second storage cavity 15 flow out, at this time, the glue raw material is mixed with the cement powder, carbon powder and yellow pigment in the mixed powder, and at this time, the glue raw material is catalyzed to rapidly polymerize, solidify and adhere, so that the interior of the first cavity 6 becomes firmer, that is, the strength of the outer protective layer 5 is improved, the overall strength of the protective sleeve 2 is further improved, the risk of the rupture of the protective sleeve 2 caused by the overhigh temperature of the transformer body 1 can be greatly reduced, and the use effect of the protective sleeve 2 and the safety of the transformer body 1 during use can be improved;

when triggering layer 4 can expand and lead to the outer wall of outer jacket 5 to produce the crack and communicate in first cavity 6, glue raw materials after protection deformation ball 7 breaks can get into the crack and can flow out the outside of outer jacket 5 with mixed powder in the first cavity 6 this moment, glue raw materials can mix the postcure with mixed powder and adhere to this moment, thereby repair the crack that outer jacket 5 outer wall produced, improve the intensity of outer jacket 5, glue raw materials and mixed powder's mixture adhesion thing can present striking yellow simultaneously, it is very striking, make things convenient for the staff in time to observe lag 2 and has appeared the problem, more serious accident has greatly been reduced to appear, transformer body 1's life has been improved.

Referring to fig. 5-6, the outer wall of the outer protective layer 5 is further provided with a plurality of heat dissipation holes 18, the inner walls of the trigger layer 4 and the outer protective layer 5 are jointly embedded and connected with a plurality of heat conduction rods 19, one end of each heat conduction rod 19 is attached to the heat conduction layer 3, the other end of each heat conduction rod 19 is communicated with the heat dissipation hole 18, the heat conduction rods 19 can dissipate heat generated on the heat conduction layer 3 into the heat dissipation holes 18, and finally the heat dissipation effect on the transformer body 1 is improved. The inside fixedly connected with of louvre 18 protects screen cloth 20, can greatly avoid some dust impurity etc. to enter into louvre 18 through the setting of protecting screen cloth 20, greatly prevent to influence the heat conduction effect of heat-conducting rod 19 and heat-conducting layer 3.

Referring to fig. 4 and 6, the outer wall of the heat conducting layer 3 is provided with a plurality of limiting arc grooves 21, the limiting arc grooves 21 are located inside the cooling groove 10, and the cooling liquid is partly accumulated in the limiting arc grooves 21 after being bounced into the cooling groove 10 through the arrangement of the limiting arc grooves 21, so that the contact time between the cooling liquid and the outer wall of the heat conducting layer 3 can be prolonged, and the cooling effect on the transformer body 1 is further improved. The outer wall of heat-conducting layer 3 still fixedly connected with a plurality of restrictions fine hair 22, restriction fine hair 22 be located cooling tank 10 inside and with the position stagger of restriction arc groove 21, can collect and disturb the coolant flow velocity to the coolant liquid that gets into cooling tank 10 through restriction fine hair 22, can make it further contact more time with the outer wall of heat-conducting layer 3.

When unusual high temperature appears in transformer body 1, transformer body 1's temperature controller can take place the signal and pass to the control room staff simultaneously, the staff received the signal and can overtake and go to maintain this moment, whether the staff can select to come the turn-off power according to the circumstances, this scheme protects the back temporarily, not in time handle when the staff, after the temperature controller detected the temperature reached appointed higher temperature, the control room can control circuit and close, and then close transformer body 1's operation, and then guarantee transformer body 1's security, avoid the follow-up risk such as detonation that causes.

The working principle is as follows: when using, when transformer body 1 temperature risees unusually, the temperature passes to in the cooling groove 10 through heat-conducting layer 3 this moment, make the gas in the cooling groove 10 receive thermal expansion, can strut the pre-splitting layer 11 to the certain degree of inflation, elastic membrane 9 in the second cavity 8 loses the restriction back this moment, as shown in fig. 8, elastic membrane 9 resumes initial form and bounces the inside coolant liquid of elastic membrane 9 to the cooling groove 10, and contact heat-conducting layer 3, thereby can cool down cooling groove 10 and heat-conducting layer 3, contact heat-conducting layer 3 through a plurality of cooling groove 10 and can effectually carry out interim cooling guard action to transformer body 1, staff's reaction and operating time have been prolonged, very big reduction transformer body 1 high temperature and produce more serious accident, the life of transformer body 1 has been improved simultaneously.

When the temperature of the transformer body 1 rises faster or continues to rise, the trigger layer 4 will continue to expand at this time, the expansion of the trigger layer 4 will extrude the protection deformation balls 7 in the first cavity 6, as shown in fig. 9, after the extrusion to a certain degree, the two side spurs 17 on the protection deformation balls 7 will contact the pre-broken layers 16 on the adjacent protection deformation balls 7, at this time, the pre-broken layers 16 on the protection deformation balls 7 will be pierced by the adjacent spurs 17, as shown in fig. 10, at this time, the mixed powder in the first storage cavity 13 in the protection deformation balls 7 and the glue raw material in the second storage cavity 15 will flow out, at this time, the glue raw material will be mixed with the cement powder, carbon powder and yellow pigment in the mixed powder, at this time, the glue raw material will be polymerized and cured rapidly by catalysis, so that the inside of the first cavity 6 becomes firmer, that is, the strength of the outer protection layer 5 is improved, and further the overall strength of the protection cover 2 is improved, the risk that the temperature of the transformer body 1 is too high to cause the burst of the protecting sleeve 2 can be greatly reduced, and the using effect of the protecting sleeve 2 and the safety of the transformer body 1 during use can be improved.

When triggering layer 4 can expand and lead to the outer wall of outer jacket 5 to produce the crack and communicate in first cavity 6, glue raw materials after protection deformation ball 7 breaks can get into the crack and can flow out the outside of outer jacket 5 with mixed powder in the first cavity 6 this moment, glue raw materials can mix the postcure with mixed powder and adhere to this moment, thereby repair the crack that outer jacket 5 outer wall produced, improve the intensity of outer jacket 5, glue raw materials and mixed powder's mixed adhesion thing can present yellow simultaneously, it is very striking, make things convenient for the staff in time to observe lag 2 and has appeared the problem, more serious accident has greatly been reduced to appear, transformer body 1's life has been improved.

When unusual high temperature appears in transformer body 1, transformer body 1's temperature controller can take place the signal and pass to the control room staff simultaneously, the staff received the signal and can overtake and go to maintain this moment, whether the staff can select to come the turn-off power according to the circumstances, this scheme protects the back temporarily, not in time handle when the staff, after the temperature controller detected the temperature reached appointed higher temperature, the control room can control circuit and close, and then close transformer body 1's operation, and then guarantee transformer body 1's security, avoid the follow-up risk such as detonation that causes.

The foregoing is only a preferred embodiment of the present invention; the scope of the invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.