Insulation protection device for electrical equipment

Abstract

The utility model discloses an insulation protection device for electrical equipment, which relates to the technical field of insulation of the electrical equipment and comprises an inner insulation shell and an outer insulation shell which are arranged on an insulation base, and a heat collection strip is arranged on the outer wall of the inner insulation shell facing the outer insulation shell. A cold medium pipeline arranged in a clamping cavity defined by the inner insulation shell and the outer insulation shell is connected with a heat exchange contact matched with the heat collection strip in a contact mode, and a medium in the cold medium pipeline circularly flows and exchanges heat with a cold source outside the outer insulation shell. And the cooling effect on the insulation protection device and the electrical equipment can be obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of insulation of electrical equipment, in particular to an insulation protection device for electrical equipment. Background Art

[0002] Insulation protection for electrical equipment generally involves isolating or enclosing live parts with non-conductive materials to ensure safe operation. Good insulation can effectively prevent electric shock accidents and protect the safety of equipment and personnel.

[0003] The document entitled "An Insulation Protection Device" (publication number CN107124847B, hereinafter referred to as Document 1) discloses a solution, including a device body, a relay, a current sensing contact, a sealed insulating ring, an insulating base, a grounding head, an inner insulating layer, a heat collecting strip, an ammeter, an alarm light, a coolant storage tank, a temperature sensor, a coolant, and an insulating shell. The device body includes an insulating shell, an inner insulating layer, and an insulating base; the heat collecting strip can effectively gather heat in the inner insulating layer and effectively absorb it through the coolant, which not only avoids the possibility of fire in the event of a short circuit, but also effectively extends the service life of the insulation protection device. In addition, the coolant temperature is detected by the temperature sensor, which further improves safety. The ammeter is used for real-time monitoring, which can effectively and easily handle leakage.

[0004] The insulation protection device in Document 1 has the following main deficiencies and defects when providing insulation protection for electrical equipment: First, the inner insulation layer, the heat collecting strip and the pipe containing the coolant are in contact with each other, and the heat exchange method therebetween is heat conduction, which has low heat exchange efficiency. In addition, the coolant in the pipe and the coolant storage tank is static, so as the heat exchange continues, the coolant temperature rises and has no cooling effect on the equipment; second, the coolant near the heat collecting strip heats up faster, and the coolant away from the heat collecting strip and the coolant storage tank heats up relatively slowly. The risk of sealing failure between the pipe and the sealing joint surface caused by thermal expansion is significantly increased. Once a leak occurs, kerosene as a coolant will not only have an impact on the environment, but also have the risk of spontaneous combustion and combustion-supporting. Utility Model Content

[0005] The purpose of the utility model is to provide an insulation protection device for electrical equipment, so as to improve the cooling effect of the insulation protection device and the electrical equipment.

[0006] The utility model can be realized by the following technical solutions: An insulation protection device for an electrical equipment, comprising an inner insulation housing and an outer insulation housing arranged on an insulation base. A heat collecting strip is arranged on the outer wall of the inner insulation housing facing the outer insulation housing. A cold medium pipeline arranged in the clamping cavity formed by the inner insulation housing and the outer insulation housing is connected with a heat exchange contact head in contact fit with the heat collecting strip. The medium inside the cold medium pipeline circulates and exchanges heat with a cold source outside the outer insulation housing.

[0007] Compared with the prior art, the utility model has the following beneficial effects:

[0008] When the electrical equipment is working, the heat generated is first transferred to the inner insulation housing. The heat collecting strip can gather the heat transferred from the inner insulation housing to the heat collecting strip. This heat is effectively absorbed by the cold medium pipeline filled with a cooling medium. Moreover, the medium in the cold medium pipeline circulates, so that the cooling medium in the cold medium pipeline is always in a low-temperature state. Although the heat exchange between the cold medium pipeline and the inner insulation housing and the outer insulation housing belongs to the heat conduction heat exchange mode, due to the large temperature difference between the cold and the hot, the high efficiency of heat exchange is ensured. Description of the Drawings

[0009] Figure 1 It is a schematic diagram of the overall structure of the utility model. Detailed Embodiment

[0010] Please refer to Figure 1 As shown in the figure, an insulation protection device for an electrical equipment, comprising an inner insulation housing 20 and an outer insulation housing 30 arranged on an insulation base 10. A heat collecting strip 21 is arranged on the outer wall of the inner insulation housing 20 facing the outer insulation housing 30. A cold medium pipeline 40 arranged in the clamping cavity formed by the inner insulation housing 20 and the outer insulation housing 30 is connected with a heat exchange contact head 41 in contact fit with the heat collecting strip 21. The medium inside the cold medium pipeline 40 circulates and exchanges heat with a cold source 50 outside the outer insulation housing 30.

[0011] In the above solution, the outer insulation layer 30 and the inner insulation housing 20 can be detachably installed on the insulation base 10. The insulation base 10 can be threadedly connected with the outer insulation layer 30 and the inner insulation housing 20 respectively; the electrical equipment is installed in the cavity formed by the insulation base 10 and the inner insulation housing 20. The double insulation of the electrical equipment is realized through the cooperation of the insulation base 10, the inner insulation housing 20 and the outer insulation housing 30, preventing the occurrence of personal electric shock accidents; the specific implementation first ensures that the heat of the inner insulation housing 20 is dissipated in time and effectively. In addition, heat exchange contact heads 41 can be extended in both the inner and outer directions of the cold medium pipeline 40, so that the heat exchange contact heads 41 are in contact with the outer insulation layer 30 and the inner insulation housing 20 respectively for heat dissipation.

[0012] When the electrical equipment is working, a large amount of heat is generated. This heat is first transferred to the inner insulating housing 20. The heat collecting strip 21 can gather the heat of the inner insulating housing 20, which is effectively absorbed by the cold medium pipeline 40 filled with the cooling medium. Moreover, the medium in the cold medium pipeline 40 circulates. When it flows through the cold source 50, heat exchange will occur with the cold source 50, causing the temperature of the medium itself to decrease. The cooling medium entering the cold medium pipeline 40 is always in a low-temperature state. Although the heat exchange between the cold medium pipeline 40 and the inner insulating housing 20 and the outer insulating housing 30 belongs to the heat conduction heat exchange method, due to the large cold and heat temperature difference, it also ensures high-efficiency heat exchange and has a good cooling effect on the electrical equipment. At the same time, since the medium in the cold medium pipeline 40 is constantly flowing, the temperature rise rates of the medium near the heat collecting strip 21 and the medium far from the heat collecting strip 21 are not very different, reducing the risk of seal failure between the pipeline and the sealed joint surface caused by thermal expansion and contraction.

[0013] The air pump 56 arranged outside the outer insulating housing 30 extracts the medium inside the cold medium pipeline 40 and sends it into the cold source 50. The medium flowing through the cold source 50 is cooled and then circulates back into the cold medium pipeline 40. After the air pump 56 is started, the medium in the cold medium pipeline 40 is pumped out and enters the cold source 50. The medium that has absorbed heat will circulate back into the cold medium pipeline 40 after being cooled by the cold source 50 and continue to exchange heat with the insulation protection device. In this embodiment, the medium is an inert gas, specifically SF6 gas, and the cold source 50 is a refrigerating machine.

[0014] A collecting hood 52 communicating with the cold medium pipeline 40 is connected to the insulating base 10. One side of the collecting hood 52 is connected to a first connecting pipe 55, and the other end of the first connecting pipe 55 is connected to the air pump 56. The air pump 56 and the cold source 50 are connected through a second connecting pipe 57. A sealing hood 51 communicating with the cold medium pipeline 40 is connected to the outer insulating housing 30. One side of the sealing hood 51 is connected to a blower box 53, and a blower 531 is arranged inside the blower box 53. The cold source 50 is connected to the blower box 53. After the electrical equipment generates heat, the heat is first transferred to the inner insulating housing 20. The heat collecting strip 21 can gather the heat transferred from the inner insulating housing 20 to the heat collecting strip 21. This heat is effectively absorbed by the cold medium pipeline 40 filled with the cooling medium. By starting the air pump 56, the medium that has absorbed heat in the cold medium pipeline 40 flows through the first connecting pipe 55, the air pump 56, the second connecting pipe 57, and the cold source 50 in sequence. After this part of the medium is cooled by the cold source 50, it will enter the blower box 53. The blower 531 in the blower box 53 works to blow the cooled medium into the sealing hood 51, and then it flows back into the cold medium pipeline 40 again. So the cooling medium entering the cold medium pipeline 40 from the sealing hood 51 is always in a low-temperature state. Although the heat exchange between the cold medium pipeline 40 and the inner insulating housing 20 and the outer insulating housing 30 belongs to the heat conduction heat exchange method, due to the large cold and heat temperature difference, it also ensures high-efficiency heat exchange, thus effectively realizing the cooling of the insulation protection device and the electrical equipment.

[0015] The air outlet of the cold medium pipeline 40 penetrates through the insulating base 10 and is connected to the air inlet of the collection hood 52 through the centralized port 57; by setting the centralized port 57, the connection between the cold medium pipeline 40 and the collection hood 52 is realized, and the medium discharged from the cold medium pipeline 40 is centrally transported into the collection hood 52.

[0016] The first connecting pipe 55 is L-shaped, and a protective layer 551 is fixedly connected to the outer side of the bent portion of the first connecting pipe 55 to protect the bent portion of the first connecting pipe 55 from the outside and extend its service life.

[0017] A filter layer 521 is also fixedly connected to the inner wall of the air outlet of the collection hood 52; the main material of the filter layer 521 is activated carbon. By using the good adsorption property of the activated carbon, the pungent odor generated during the processing of the insulating material is hermetically filtered, thus ensuring the gas quality of the circulating cold gas and greatly improving the practicality of the device.

[0018] A first temperature sensor 532 for detecting the gas before entering the cold medium pipeline 40 is arranged inside the air blower box 53, and a second temperature sensor 571 for detecting the gas when leaving the cold medium pipeline 40 is arranged inside the centralized port 57; by detecting the temperature of the gas before entering the cold medium pipeline 40 through the first temperature sensor 541 and detecting the temperature of the gas when leaving the cold medium pipeline 40 through the second sensor 571, the heat exchange effect of the cold medium pipeline 40 can be intuitively understood.

[0019] A plurality of grounding heads 11 are arranged at the bottom of the insulating base 10 to prevent personal safety from being endangered due to electrification caused by insulation damage.

Claims

1. An insulating protection device for an electrical equipment, comprising an inner insulating housing (20) and an outer insulating housing (30) arranged on an insulating base (10). A heat collecting strip (21) is arranged on the outer wall of the inner insulating housing (20) facing the outer insulating housing (30). A cold medium pipeline (40) arranged in the clamping cavity formed by the inner insulating housing (20) and the outer insulating housing (30) is connected with a heat exchange contact head (41) in contact fit with the heat collecting strip (21). It is characterized in that: The medium inside the cold medium pipeline (40) circulates and exchanges heat with the cold source (50) outside the outer insulation housing (30).

2. The insulation protection device for electrical equipment according to claim 1, characterized in that: An air pump (56) arranged outside the outer insulation housing (30) extracts the medium inside the cold medium pipeline (40) and sends it into the cold source (50), and the medium flowing through the cold source (50) is cooled and then circulates back into the cold medium pipeline (40).

3. The insulating protection device for electrical equipment according to claim 2, characterized in that: A collection hood (52) communicating with the cold medium pipeline (40) is connected to the insulating base (10). One side of the collection hood (52) is connected to a first connecting pipe (55), and the other end of the first connecting pipe (55) is connected to the air pump (56). The air pump (56) and the cold source (50) are connected through a second connecting pipe (57). A sealing hood (51) communicating with the cold medium pipeline (40) is connected to the outer insulation housing (30). One side of the sealing hood (51) is connected to a blower box (53), and a blower (531) is arranged inside the blower box (53). The cold source (50) communicates with the blower box (53).

4. The insulation protection device for electrical equipment according to claim 2, characterized in that: The air outlet of the cold medium pipeline (40) penetrates through the insulating base (10) and is connected to the air inlet of the collection hood (52) through a central port (57).

5. The insulating protection device for electrical equipment according to claim 2, characterized in that: The first connecting pipe (55) is L-shaped, and a protective layer (551) is fixedly connected to the outside of the bent part of the first connecting pipe (55).

6. The insulation protection device for electrical equipment according to claim 2, characterized in that: A filter layer (521) is also fixedly connected to the inner wall of the air outlet of the collection hood (52).

7. The insulating protection device for electrical equipment according to claim 2, characterized in that: A first temperature sensor (532) for detecting the gas before entering the cold medium pipeline (40) is arranged inside the blower box (53), and a second temperature sensor (571) for detecting the gas when leaving the cold medium pipeline (40) is arranged inside the central port (57).

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