A controllable intelligent distribution transformer

Abstract

The present invention relates to the technical field related to transformer cooling, and discloses an adjustable intelligent distribution transformer, including a heat dissipation shell and an oil pillow, the oil pillow is installed on the top of the heat dissipation shell, a winding mechanism is arranged in the heat dissipation shell, an inner rubber sleeve and an outer rubber sleeve are sandwiched between the winding mechanism and the heat dissipation shell, an inner heat dissipation cavity is formed between the inner rubber sleeve and the winding mechanism, and an isolated heat dissipation cavity is formed between the inner rubber sleeve and the outer rubber sleeve. The intelligent distribution transformer, by arranging the inner rubber sleeve and the outer rubber sleeve to cooperate with each other, forms an inner heat dissipation cavity, an isolated heat dissipation cavity and an outer heat dissipation cavity between the heat dissipation shell and the winding mechanism, is different from the traditional cooling oil immersion method, the transformer cooling oil injected into the heat dissipation shell is adjusted to the maximum extent, and the introduction immersion volume of the transformer cooling oil is adjusted according to the voltage allocation value of the distribution transformer, so as to improve the applicability of the transformer cooling oil in the distribution transformer.

Description

Technical Field

[0001] The present invention relates to the technical field related to transformer cooling, and in particular to an adjustable intelligent distribution transformer. Background Art

[0002] Distribution transformer, referred to as "distribution transformer". It refers to a static electrical device in the power distribution system that transforms AC voltage and current according to the law of electromagnetic induction to transmit AC power. In some areas, power transformers with voltage levels below 35 kV (mostly 10kV and below) are called "distribution transformers", referred to as "distribution transformers". The place and place where "distribution transformers" are installed is the substation.

[0003] In production and life, distribution transformers are generally intelligently allocated and controlled through networking to ensure the coordinated operation of the power grid. In the prior art, large distribution transformers are generally immersed in insulation and cooled by injecting cooling oil. This cooling method requires injecting a large amount of cooling oil to cover and immerse the winding mechanism to ensure normal heat exchange cooling of the core and winding during operation. The cooling oil cannot be accurately allocated and used, and a large amount of cooling oil is required for immersion. After long-term use, impurities are inevitably mixed into the cooling oil, affecting the quality of the oil and reducing the insulation performance of the cooling oil. There are certain safety hazards. Therefore, the inventor has designed an adjustable intelligent distribution transformer. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the present invention provides an adjustable intelligent distribution transformer, which solves the problem that the coolant in the transformer cannot be accurately adjusted and used.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an adjustable intelligent distribution transformer, comprising a heat dissipation shell and an oil pillow, the oil pillow is installed on the top of the heat dissipation shell, a winding mechanism is arranged in the heat dissipation shell, an inner rubber sleeve and an outer rubber sleeve are sandwiched between the winding mechanism and the heat dissipation shell, an inner heat dissipation cavity is formed between the inner rubber sleeve and the winding mechanism, an isolated heat dissipation cavity is formed between the inner rubber sleeve and the outer rubber sleeve, and an outer heat dissipation cavity is formed between the outer rubber sleeve and the inner wall of the heat dissipation shell;

[0008] An insulating connecting rod is arranged between the side wall of the heat dissipation shell and the inner rubber sleeve, and high and low voltage lead-out columns and insulating support columns are respectively arranged between the top and bottom of the inner cavity of the heat dissipation shell and the winding mechanism, and insulating telescopic rubber sleeves are installed at the joints between the insulating connecting rod, the high and low voltage lead-out columns and the insulating support columns and the inner rubber sleeve and the outer rubber sleeve;

[0009] A shunt pipe is installed at the bottom interface of the oil pillow, and an oil pump for pressure regulation is installed on the shunt pipe. An internal control mechanism and an external control mechanism connected to the inner heat dissipation cavity and the outer heat dissipation cavity are respectively installed at the shunt outlet interface of the shunt pipe. A regulating mechanism connected to the inner cavity of the isolation heat dissipation cavity is installed on the heat dissipation shell, and an internal discharge mechanism and an external discharge mechanism connected to the inner heat dissipation cavity and the outer heat dissipation cavity are respectively installed at the bottom of the heat dissipation shell.

[0010] Preferably, the inner rubber sleeve and the outer rubber sleeve are both made of corrosion-resistant and highly insulating insulating rubber, and the insulating telescopic rubber sleeve is vulcanized, glued and sealed with the connecting parts of the corresponding inner rubber sleeve and outer rubber sleeve. The vulcanized connection between the insulating telescopic rubber sleeve and the inner rubber sleeve and the outer rubber sleeve improves the integrity of the coordination between the mechanisms.

[0011] Preferably, the internal control mechanism, external control mechanism and regulating mechanism are all provided with a guide tube and a corresponding switch butterfly valve, the switch butterfly valve adopts an electric high-sealing switch butterfly valve, and the internal control mechanism, external control mechanism and regulating mechanism are controlled and switched by an external controller.

[0012] Preferably, the lead-out ends of the high and low voltage lead-out columns extend to the outside of the heat dissipation housing and are sleeved with matching insulating sleeves.

[0013] Preferably, the inner and outer discharge mechanisms are both provided with oil discharge pipes and corresponding electrically controlled valve bodies, and the inner and outer discharge mechanisms are controlled to discharge oil through an external controller.

[0014] Preferably, a safe insulation distance is left between the winding mechanism and the inner cavity side wall of the inner rubber sleeve, and a safe insulation distance is left between the outer rubber sleeve and the inner wall of the heat dissipation shell, so as to avoid contact between the inner rubber sleeve and the outer rubber sleeve and the adjacent electrical component structure, thereby ensuring the stability of the coordinated use between the structures. The inner rubber sleeve and the outer rubber sleeve maintain a safe insulation distance through the insulating connecting rod, the high and low voltage lead-out columns and the insulating support columns.

[0015] Preferably, the oil pillow, the inner heat dissipation cavity and the outer heat dissipation cavity are all filled with transformer cooling oil for cooling, and the isolation heat dissipation cavity is injected with sulfur hexafluoride gas, which has good electrical insulation properties and excellent arc extinguishing performance, thereby improving the safety of equipment operation.

[0016] (III) Beneficial effects

[0017] The present invention provides an adjustable intelligent distribution transformer, which has the following beneficial effects:

[0018] (1) The intelligent distribution transformer forms an inner heat dissipation cavity, an isolation heat dissipation cavity and an outer heat dissipation cavity between the heat dissipation shell and the winding mechanism by arranging an inner rubber sleeve and an outer rubber sleeve to cooperate with each other, and injects sulfur hexafluoride gas into the isolation heat dissipation cavity to adjust the gas pressure of the isolation heat dissipation cavity. The inner rubber sleeve and the outer rubber sleeve expand inward and outward respectively under the squeezing action of the high-pressure gas, thereby achieving the purpose of spatial adjustment of the inner heat dissipation cavity and the outer heat dissipation cavity. Different from the traditional cooling oil immersion method, the transformer cooling oil injected into the heat dissipation shell is adjusted and used to the maximum extent. The introduction immersion volume of the transformer cooling oil is adjusted according to the voltage adjustment value of the distribution transformer, thereby improving the applicability of the transformer cooling oil in the distribution transformer. The inner cavity of the heat dissipation shell is in a high-pressure state, which minimizes the vibration generated by the internal components of the transformer during operation, thereby ensuring the stability of the coordination between the equipment mechanisms.

[0019] (2) The intelligent distribution transformer provides an insulating connecting rod, an insulating support column and a high and low voltage lead-out column to limit the inner rubber sleeve and the outer rubber sleeve in multiple directions, thereby limiting the multiple degrees of freedom of movement of the inner rubber sleeve and the outer rubber sleeve, so that the inner rubber sleeve and the outer rubber sleeve can be structurally supported in the heat dissipation shell, and the transformer cooling oil is isolated and cooled. The sulfur hexafluoride gas injected into the isolation heat dissipation cavity can minimize the arc generated by the isolation transformer, improve the safety caused by the reduction of the insulation performance of the transformer cooling oil in the inner heat dissipation cavity, and ensure the long-term effective coordination of the internal structure of the equipment.

[0020] (3) The intelligent distribution transformer is provided with an insulating telescopic rubber sleeve on the inner rubber sleeve and the outer rubber sleeve, so that when the internal space of the inner heat dissipation cavity, the isolation heat dissipation cavity and the outer heat dissipation cavity is adjusted for use, the inner rubber sleeve and the outer rubber sleeve can be adjusted and limited under the action of the soft connection of the insulating telescopic rubber sleeve, thereby ensuring the connection stability of the adjustment of the internal space of the inner heat dissipation cavity, the isolation heat dissipation cavity and the outer heat dissipation cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 for Figure 1 A schematic diagram of the enlarged structure in the middle.

[0023] In the figure: 1 heat dissipation shell, 2 winding mechanism, 3 inner rubber sleeve, 4 outer rubber sleeve, 5 inner heat dissipation cavity, 6 isolation heat dissipation cavity, 7 outer heat dissipation cavity, 8 insulating connecting rod, 9 high and low voltage lead-out column, 10 insulating support column, 11 insulating telescopic rubber sleeve, 12 oil pillow, 13 shunt pipe, 14 external control mechanism, 15 internal control mechanism, 16 regulating mechanism, 17 internal discharge mechanism, 18 external discharge mechanism, 19 oil pump. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figure 1-2 As shown, the present invention provides a technical solution: an adjustable intelligent distribution transformer, comprising a heat dissipation shell 1 and an oil pillow 12, the heat dissipation shell 1 is an outer box of the distribution transformer, the oil pillow 12 is installed on the top of the heat dissipation shell 1, a winding mechanism 2 is arranged in the heat dissipation shell 1, an inner rubber sleeve 3 and an outer rubber sleeve 4 are sandwiched between the winding mechanism 2 and the heat dissipation shell 1, an inner heat dissipation cavity 5 is formed between the inner rubber sleeve 3 and the winding mechanism 2, an isolated heat dissipation cavity 6 is formed between the inner rubber sleeve 3 and the outer rubber sleeve 4, an outer heat dissipation cavity 7 is formed between the outer rubber sleeve 4 and the inner wall of the heat dissipation shell 1, the oil pillow 12, the inner heat dissipation cavity 5 and the outer heat dissipation cavity 7 are all filled with transformer cooling oil for cooling, and sulfur hexafluoride gas is injected into the isolated heat dissipation cavity 6. Sulfur hexafluoride gas has good electrical insulation performance and excellent arc extinguishing performance, thereby improving the safety of equipment operation.

[0026] An insulating connecting rod 8 is arranged between the side wall of the heat dissipation housing 1 and the inner rubber sleeve 3, and a high and low voltage lead-out column 9 and an insulating support column 10 are arranged between the top and bottom of the inner cavity of the heat dissipation housing 1 and the winding mechanism 2, respectively. The lead-out end of the high and low voltage lead-out column 9 extends to the heat dissipation housing 1. The outer side is sleeved with an adaptive insulating sleeve, and the connecting and matching parts between the insulating connecting rod 8, the high and low voltage lead-out column 9 and the insulating support column 10 and the inner rubber sleeve 3 and the outer rubber sleeve 4 are all installed with insulating telescopic rubber sleeves 11. The inner rubber sleeve 3 and the outer rubber sleeve 4 are made of corrosion-resistant and highly insulating insulating rubber. The insulating telescopic rubber sleeve 11 is vulcanized and glued to seal the corresponding connecting part of the inner rubber sleeve 3 and the outer rubber sleeve 4. The vulcanized connection between the insulating telescopic rubber sleeve 11 and the inner rubber sleeve 3 and the outer rubber sleeve 4 improves the integrity of the cooperation between the mechanisms. A safe insulation distance is left between the winding mechanism 2 and the inner cavity side wall of the inner rubber sleeve 3, and a safe insulation distance is left between the outer rubber sleeve 4 and the inner side wall of the heat dissipation shell 1 to avoid contact between the inner rubber sleeve 3 and the outer rubber sleeve 4 and the adjacent electrical component structure, to ensure the stability of the coordinated use between the structures, and the inner rubber sleeve 3 and the outer rubber sleeve 4 are kept at a safe insulation distance through the insulating connecting rod 8, the high and low voltage lead-out column 9 and the insulating support column 10.

[0027] A shunt pipe 13 is installed at the bottom interface of the oil pillow 12, and an oil pump 19 for pressure regulation is installed on the shunt pipe 13. An internal control mechanism 15 and an external control mechanism 14 connected to the inner heat dissipation cavity 5 and the outer heat dissipation cavity 7 are respectively installed at the shunt outlet interface of the shunt pipe 13. A regulating mechanism 16 connected to the inner cavity of the isolation heat dissipation cavity 6 is installed on the heat dissipation shell 1. An inner discharge mechanism 17 and an outer discharge mechanism 18 connected to the inner heat dissipation cavity 5 and the outer heat dissipation cavity 7 are respectively installed at the bottom of the heat dissipation shell 1. The internal control mechanism 15, the external control mechanism 14 and the regulating mechanism 16 are all provided with a guide pipe and a corresponding switch butterfly valve. The internal control mechanism 15, the external control mechanism 14 and the regulating mechanism 16 The guide pipe on it cooperates with the insulating seal of the part that passes through the inner rubber sleeve 3 and the outer rubber sleeve 4. The switch butterfly valve adopts an electric high-sealing switch butterfly valve. The internal control mechanism 15, the external control mechanism 14 and the regulating mechanism 16 are controlled and adjusted by an external controller. The internal discharge mechanism 17 and the external discharge mechanism 18 are both provided with oil drain pipes and corresponding electric control valve bodies. The oil drain pipes on the internal discharge mechanism 17 and the external discharge mechanism 18 cooperate with the insulating seal of the part that passes through the inner rubber sleeve 3 and the outer rubber sleeve 4. The internal discharge mechanism 17 and the external discharge mechanism 18 are controlled and adjusted by an external controller.

[0028] The electrical components mentioned in this article are all connected to an external main controller and a mains supply, and the main controller may be a conventional known device for controlling a computer or the like.

[0029] In summary, when the equipment is in use, sulfur hexafluoride gas is injected into the isolated heat dissipation cavity 6 through the regulating mechanism 16, so as to adjust the gas pressure of the isolated heat dissipation cavity 6, and the inner rubber sleeve 3 and the outer rubber sleeve 4 are respectively expanded inward and outward under the squeezing action of the high-pressure gas. At this time, the corresponding insulating telescopic rubber sleeves 11 on the inner rubber sleeve 3 and the outer rubber sleeve 4 are correspondingly telescopically adjusted, thereby achieving the purpose of spatial adjustment of the inner heat dissipation cavity 5 and the outer heat dissipation cavity 7. Transformer cooling oil can also be injected into the inner heat dissipation cavity 5 and the outer heat dissipation cavity 7 respectively through the external control mechanism 14 and the internal control mechanism 15 under the pressure of the oil pump 19, so as to increase the cooling hydraulic pressure inside the equipment and ensure the stability of the coordinated use of the mechanisms.

[0030] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the statement "including a reference structure" do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. Although embodiments of the present invention have been shown and described, it is understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. An adjustable intelligent distribution transformer, comprising a heat dissipation housing and an oil pillow, wherein the oil pillow is mounted on the top of the heat dissipation housing, and characterized in that: A winding mechanism is arranged in the heat dissipation shell, an inner rubber sleeve and an outer rubber sleeve are sandwiched between the winding mechanism and the heat dissipation shell, an inner heat dissipation cavity is formed between the inner rubber sleeve and the winding mechanism, an isolated heat dissipation cavity is formed between the inner rubber sleeve and the outer rubber sleeve, and an outer heat dissipation cavity is formed between the outer rubber sleeve and the inner wall of the heat dissipation shell; An insulating connecting rod is arranged between the side wall of the heat dissipation shell and the inner rubber sleeve, and high and low voltage lead-out columns and insulating support columns are respectively arranged between the top and bottom of the inner cavity of the heat dissipation shell and the winding mechanism, and insulating telescopic rubber sleeves are installed at the joints between the insulating connecting rod, the high and low voltage lead-out columns and the insulating support columns and the inner rubber sleeve and the outer rubber sleeve; A shunt pipe is installed at the bottom interface of the oil pillow, and an oil pump for pressure regulation is installed on the shunt pipe. An internal control mechanism and an external control mechanism connected to the inner heat dissipation cavity and the outer heat dissipation cavity are respectively installed at the shunt outlet interface of the shunt pipe. A regulating mechanism connected to the inner cavity of the isolation heat dissipation cavity is installed on the heat dissipation shell, and an internal discharge mechanism and an external discharge mechanism connected to the inner heat dissipation cavity and the outer heat dissipation cavity are respectively installed at the bottom of the heat dissipation shell.

2. The controllable intelligent distribution transformer according to claim 1, characterized in that: The inner rubber sleeve and the outer rubber sleeve are both made of corrosion-resistant and highly insulating insulating rubber, and the insulating telescopic rubber sleeve is vulcanized, glued and sealed with the connecting part of the corresponding inner rubber sleeve and the outer rubber sleeve.

3. The controllable intelligent distribution transformer according to claim 1, characterized in that: The internal control mechanism, the external control mechanism and the regulating mechanism are all provided with flow guide pipes and corresponding switch butterfly valves.

4. The controllable intelligent distribution transformer according to claim 1, characterized in that: The lead-out ends of the high and low voltage lead-out columns extend to the outside of the heat dissipation housing and are sleeved with matching insulating sleeves.

5. The controllable intelligent distribution transformer according to claim 1, characterized in that: The inner discharge mechanism and the outer discharge mechanism are both provided with an oil discharge pipe and a corresponding electric control valve body.

6. The controllable intelligent distribution transformer according to claim 1, characterized in that: A safe insulation distance is left between the winding mechanism and the inner cavity side wall of the inner rubber sleeve, a safe insulation distance is left between the outer rubber sleeve and the inner side wall of the heat dissipation shell, and a safe insulation distance is maintained between the inner rubber sleeve and the outer rubber sleeve through an insulating connecting rod, high and low voltage lead-out columns and an insulating support column.

7. The controllable intelligent distribution transformer according to claim 1, characterized in that: The oil pillow, the inner heat dissipation cavity and the outer heat dissipation cavity are all filled with transformer cooling oil for cooling, and sulfur hexafluoride gas is injected into the isolation heat dissipation cavity.

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