Dry-type transformer system

Abstract

The embodiment of the invention discloses a dry-type transformer system which comprises a dry-type transformer body and a dry-type transformer static side mechanism, a moving contact assembly is arranged on the dry-type transformer body, a static contact corresponding to the moving contact assembly is arranged on the dry-type transformer static side mechanism, and the moving contact assembly comprises a duckbilled moving contact, a moving contact frame and a conductive base. The duckbilled moving contact and the moving contact frame are correspondingly arranged on the conductive base, and the moving contact frame is provided with an elastic piece which applies pressure to the two sides of the duckbilled moving contact. According to the invention, the grounding resistance is reduced through the elastic piece with high-strength pressure, so that the power supply side and the load side of the dry-type transformer can be quickly switched off or switched on; in a large-current operation state, air cooling is started or stopped according to the temperature change detected by the contact temperature sensor, the insulation aging risk of the contact is eliminated, and then the power supply reliability and safety of the data center are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of data center power supply, and in particular to a dry-type transformer system. Background Art

[0002] With the massive operation of information technology and artificial intelligence, the reliability and safety requirements of data center power supplies are becoming increasingly higher. When a dry-type transformer fails, it is necessary to quickly repair or replace the dry-type transformer so that power can be restored quickly. Summary of the invention

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a dry-type transformer system so as to enable rapid restoration of power transmission.

[0004] In order to solve the above technical problems, an embodiment of the present invention proposes a dry-type transformer system, including a dry-type transformer body and a dry-type transformer static side mechanism, the dry-type transformer body is provided with a moving contact assembly, the dry-type transformer static side mechanism is provided with a static contact corresponding to the moving contact assembly, the moving contact assembly includes a duckbill moving contact, a moving contact frame, and a conductive base, the duckbill moving contact and the moving contact frame are correspondingly arranged on the conductive base, and the moving contact frame is provided with an elastic member for applying pressure to both sides of the duckbill moving contact.

[0005] Furthermore, the elastic member is composed of a plurality of compression springs.

[0006] Furthermore, the surface of the stationary contact and the inner side of the duckbill moving contact are plated with a silver layer, and a graphite and electric composite grease coating is provided on the silver layer. The moving contact frame is a steel frame, and the surface is plated with a copper layer.

[0007] Furthermore, it also includes a cooling fan assembly, the cooling fan assembly includes a cooling outlet for blowing air toward the duckbill moving contact, the moving contact frame is provided with a contact temperature sensor electrically connected to the cooling fan assembly, the contact temperature sensor includes a temperature-sensitive liquid container, a temperature-sensitive liquid expansion tube, a transmission mechanism, a reset mechanism, a moving contact assembly, and a static contact assembly, the temperature-sensitive liquid expansion tube is connected to the temperature-sensitive liquid container, the temperature-sensitive liquid container is filled with temperature-sensitive liquid, the temperature-sensitive liquid expansion tube is equipped with a piston and a piston rod connected to the piston, the piston rod drives the moving contact assembly to contact the static contact assembly through the transmission mechanism, and the reset mechanism drives the moving contact assembly to separate from the static contact assembly through the transmission mechanism.

[0008] Furthermore, the transmission mechanism includes a torque connecting rod and a corresponding torque connecting rod fulcrum, one end of the torque connecting rod is connected to the piston rod, and the moving contact assembly is arranged at the other end of the torque connecting rod.

[0009] Furthermore, the moving contact assembly includes a moving contact insulator and a moving contact sliding plate arranged on the moving contact insulator, and the static contact assembly includes a static contact insulator and a static contact sliding plate arranged on the static contact insulator.

[0010] Furthermore, a moving contact is provided on the moving contact sliding plate, and two static contacts spaced at a preset distance are correspondingly provided on the static contact sliding plate.

[0011] Furthermore, the reset mechanism is a reset spring, and the reset spring acts on the torque connecting rod.

[0012] Furthermore, the upper part of the temperature-sensitive liquid container is hemispherical, and the bottom is flat, and the temperature-sensitive liquid expansion pipe is connected to the upper part of the temperature-sensitive liquid container.

[0013] Furthermore, it also includes a track and a hydraulic drive mechanism for driving the dry-type transformer body to connect or separate with the dry-type transformer static side mechanism, and a track wheel is correspondingly provided at the bottom of the dry-type transformer body.

[0014] The beneficial effects of the present invention are as follows: the present invention reduces the grounding resistance by means of elastic parts with high-strength pressure, so as to realize the rapid disconnection or closing of the power supply side and the load side of the dry-type transformer; under the high-current operation state, the present invention starts or shuts down the air cooling according to the temperature change detected by the contact temperature sensor, thereby eliminating the risk of contact insulation aging, and thus improving the reliability and safety of power supply in the data center. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural diagram of a dry-type transformer system according to an embodiment of the present invention.

[0016] Figure 2 It is a three-dimensional structural diagram of a dry-type transformer body according to an embodiment of the present invention.

[0017] Figure 3 It is a three-dimensional structural diagram of a moving contact assembly at one angle according to an embodiment of the present invention.

[0018] Figure 4 It is a three-dimensional structural diagram of the moving contact assembly of an embodiment of the present invention from another angle.

[0019] Figure 5 Schematic diagram of the application structure of the contact temperature sensor according to the embodiment of the present invention.

[0020] Figure 6 4 is a principle block diagram of a contact temperature sensor according to an embodiment of the present invention.

[0021] Figure 7 It is a main circuit principle diagram when the cooling fan assembly of an embodiment of the present invention starts the heat exhaust fan.

[0022] Figure 8 It is a main circuit principle diagram when the cooling fan assembly of an embodiment of the present invention starts the heat exhaust fan and the air conditioning fan.

[0023] Description of Figure Numbers Dry-type transformer static side mechanism 10, static contact 11, moving contact assembly 20, moving contact frame 21, conductive base 22, elastic member 23, duckbill moving contact 24, cooling air outlet 25, dry-type transformer body 30, cooling fan assembly 31, hydraulic drive mechanism 32, track wheel 33, track 34, contact temperature sensor 40, temperature-sensitive liquid container 41, temperature-sensitive liquid expansion tube 42, piston rod 43, torque connecting rod 44, torque connecting rod fulcrum 45, reset mechanism 46, moving contact insulator 47, moving contact sliding plate 48, static contact insulator 49, static contact sliding plate 50, moving contact JD1, static contacts JD2, JD3, relays J1, J2, isolating switches L1, L2, L3, fuse FU1, contactors KM1, KM2, thermal protection relays FR1, FR2, heat exhaust fan M1, electrical compartment air conditioning cooling fan M2. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention is further described in detail below in conjunction with the drawings and specific embodiments.

[0025] In the embodiments of the present invention, if there are directional indications (such as up, down, left, right, front, back, etc.), they are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0027] Please refer to Figures 1 to 8 The dry-type transformer system of the embodiment of the present invention includes a dry-type transformer body and a dry-type transformer static side mechanism.

[0028] The dry-type transformer body is provided with a moving contact assembly, and the dry-type transformer static side mechanism is provided with a static contact corresponding to the moving contact assembly. The moving contact assembly includes a duckbill moving contact, a moving contact frame, and a conductive base. The duckbill moving contact and the moving contact frame are correspondingly arranged on the conductive base, and the moving contact frame is provided with an elastic member for applying pressure to both sides of the duckbill moving contact. The elastic member is composed of a plurality of compression springs. The conductive base, the static contact, and the duckbill moving contact are all made of copper, and the conductive base is preferably a copper flat plate.

[0029] As an implementation method, the surface of the static contact and the inner side of the duckbill moving contact are plated with a silver layer, and a graphite and electric composite grease coating is provided on the silver layer. The duckbill moving contact is composed of two oppositely arranged power head plates, the front end of which is the moving contact duckbill part, and the static contact is T-shaped. The moving contact duckbill part and the power head plate are both copper one-piece molded components. The static contact is a copper material with a silver-plated outer layer on the surface and a graphite and electric composite grease coating on the outer layer to isolate corrosive substances, reduce contact resistance and sliding resistance between the duckbill moving contact metal and the static contact metal, and avoid wear.

[0030] The elastic member preferably adopts 18 high-strength compression springs, and the 18 high-strength compression springs are fixed between the power head plate and the moving contact frame of the duckbill type moving contact to ensure that the contact surface with the static contact is flat and in close contact.

[0031] As an implementation method, the moving contact frame is a steel frame, which can improve strength and prevent deformation under the long-term action of the elastic member. The surface of the steel frame is plated with a copper layer, which is more conducive to heat conduction.

[0032] The moving contact assembly of the present invention is used on the power supply side (i.e., high-voltage side) and the load side (i.e., low-voltage side) of the dry-type transformer body. In order to achieve rapid maintenance and ensure personnel safety, the dry-type transformer is pulled out of the cabin when maintenance or overhaul is required, replacing the traditional busbar connection bolt-fixed joint, achieving disconnection from the power supply, and convenient and safe overhaul in the spacious cabin. The dry-type transformer can also be used as a spare component, which can be quickly replaced when a failure occurs or maintenance is required, which improves reliability while minimizing power outage time, and has obvious economic benefits.

[0033] As an implementation method, the dry-type transformer system also includes a cooling fan assembly, which includes a cooling air outlet for blowing air toward the duckbill moving contact. The cooling fan assembly also includes a heat exhaust fan, an electrical compartment air conditioning cold air fan, and a control circuit. The control circuit includes relays, disconnectors, fuses, contactors, thermal protection relays, etc. When the temperature reaches the first-level set value, the contact temperature sensor drives the relay to operate, the heat exhaust fan starts, and the air outlet is located directly below the duckbill moving contact. When the temperature reaches the second-level set value, the contact temperature sensor drives the corresponding relay to operate, and the electrical compartment air conditioning cold air fan inputs cold air to quickly cool the contact, which can increase the high-current carrying capacity of the conductor and ensure the reliable and safe operation of the insulator during its service life.

[0034] Below the duckbill moving contact is a cooling air outlet for cooling the duckbill moving contact. Under the control of the contact temperature sensor, automatic cooling air is supplied to prevent the contact from overheating under high current, causing high resistance and deteriorating insulation performance, and to avoid long-term high current overheating, causing aging and then short circuit accidents.

[0035] The moving contact frame is provided with a contact temperature sensor electrically connected to the cooling fan assembly. The contact temperature sensor comprises a temperature sensing liquid container, a temperature sensing liquid expansion tube, a transmission mechanism, a reset mechanism, a moving contact assembly, and a static contact assembly.

[0036] The temperature-sensitive liquid expansion tube is connected to the temperature-sensitive liquid container, and the temperature-sensitive liquid container contains the temperature-sensitive liquid. The temperature-sensitive liquid can be a glycol mixture, and the temperature-sensitive liquid container is preferably a copper container. The temperature-sensitive liquid expansion tube contains a piston and a piston rod connected to the piston. When the temperature of the temperature-sensitive liquid rises, it expands due to heat, lifts the piston, and then drives the piston rod.

[0037] The piston rod drives the moving contact assembly to contact with the static contact assembly through the transmission mechanism. When the temperature of the temperature-sensing liquid drops, the reset mechanism drives the moving contact assembly to separate from the static contact assembly through the transmission mechanism.

[0038] As an implementation method, the transmission mechanism includes a torque connecting rod and a corresponding torque connecting rod fulcrum, one end of the torque connecting rod is connected to the piston rod, and the moving contact assembly is arranged at the other end of the torque connecting rod. The middle part of the torque connecting rod is rotatably connected to the torque connecting rod fulcrum.

[0039] The reset mechanism is a reset spring, which acts on the torque connecting rod. If the reset spring is a tension spring, it acts on the same side of the torque connecting rod and the piston rod; conversely, if the reset spring tests the elastic force on the torque connecting rod, it acts on the same side of the torque connecting rod and the moving contact assembly. When the temperature of the main power contact drops, the temperature of the temperature-sensing liquid drops, and the spring tension causes the pull rod to return to its original position.

[0040] As an embodiment, the moving contact assembly includes a moving contact insulator and a moving contact sliding plate arranged on the moving contact insulator. Preferably, there are two moving contact sliding plates, and a pressure spring is arranged between the two moving contact sliding plates. The static contact assembly includes a static contact insulator and a static contact sliding plate arranged on the static contact insulator. A moving contact is arranged on the moving contact sliding plate, and two static contacts with a preset distance between the front and the back are correspondingly arranged on the static contact sliding plate. The present invention realizes two kinds of control by setting two static contacts. For example, when the temperature of the temperature-sensing liquid rises, the moving contact is driven to contact and conduct with the static contact JD2 at the front end, and the heat exhaust fan is started; when the temperature of the temperature-sensing liquid continues to rise, the moving contact is driven to contact and conduct with the static contact JD3 at the rear end, and the heat exhaust fan and the cooling air fan of the electrical compartment air conditioner are started to supply air to the main power contact through the air duct, thereby realizing automation to reduce the temperature of the main power contact under the high current of the data center power supply.

[0041] As an implementation method, the upper part of the temperature-sensitive liquid container is hemispherical, and the bottom is flat, and the temperature-sensitive liquid expansion tube is connected to the upper part of the temperature-sensitive liquid container, and the bottom is in contact with the moving contact frame.

[0042] As an implementation method, the dry-type transformer system also includes a track and a hydraulic drive mechanism for driving the dry-type transformer body to connect or disconnect with the dry-type transformer static side mechanism, and a track wheel is correspondingly provided at the bottom of the dry-type transformer body. The track facilitates the user to pull out the dry-type transformer body for inspection or replacement.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dry-type transformer system, characterized in that: It includes a dry-type transformer body and a dry-type transformer static side mechanism. A moving contact assembly is provided on the dry-type transformer body. A static contact corresponding to the moving contact assembly is provided on the dry-type transformer static side mechanism. The moving contact assembly includes a duckbill moving contact, a moving contact frame, and a conductive base. The duckbill moving contact and the moving contact frame are correspondingly arranged on the conductive base. An elastic member for applying pressure to both sides of the duckbill moving contact is provided on the moving contact frame.

2. The dry-type transformer system according to claim 1, characterized in that: The elastic member is composed of a plurality of compression springs.

3. The dry-type transformer system according to claim 1, characterized in that: The surface of the static contact and the inner side of the duckbill moving contact are plated with a silver layer, on which a graphite and electric composite grease coating is provided. The moving contact frame is a steel frame, and the surface is plated with a copper layer.

4. The dry-type transformer system according to claim 1, characterized in that: It also includes a cooling fan assembly, which includes a cooling outlet for blowing air toward the duckbill moving contact. The moving contact frame is provided with a contact temperature sensor electrically connected to the cooling fan assembly. The contact temperature sensor includes a temperature-sensitive liquid container, a temperature-sensitive liquid expansion tube, a transmission mechanism, a reset mechanism, a moving contact assembly, and a static contact assembly. The temperature-sensitive liquid expansion tube is connected to the temperature-sensitive liquid container, which contains temperature-sensitive liquid. The temperature-sensitive liquid expansion tube contains a piston and a piston rod connected to the piston. The piston rod drives the moving contact assembly to contact the static contact assembly through the transmission mechanism, and the reset mechanism drives the moving contact assembly to separate from the static contact assembly through the transmission mechanism.

5. The dry-type transformer system according to claim 4, characterized in that: The transmission mechanism comprises a torque connecting rod and a corresponding torque connecting rod fulcrum, one end of the torque connecting rod is connected to the piston rod, and the moving contact assembly is arranged at the other end of the torque connecting rod.

6. The dry-type transformer system according to claim 5, characterized in that: The moving contact assembly comprises a moving contact insulator and a moving contact sliding plate arranged on the moving contact insulator, and the stationary contact assembly comprises a stationary contact insulator and a stationary contact sliding plate arranged on the stationary contact insulator.

7. The dry-type transformer system according to claim 6, characterized in that: A moving contact is arranged on the moving contact sliding plate, and two static contacts with a preset interval are correspondingly arranged on the static contact sliding plate.

8. The dry-type transformer system according to claim 5, characterized in that: The reset mechanism is a reset spring, and the reset spring acts on the torque connecting rod.

9. The dry-type transformer system according to claim 4, characterized in that: The upper part of the temperature-sensitive liquid container is hemispherical, and the bottom is flat. The temperature-sensitive liquid expansion pipe is connected to the upper part of the temperature-sensitive liquid container.

10. The dry-type transformer system according to claim 1, characterized in that: It also includes a track and a hydraulic drive mechanism for driving the dry-type transformer body to connect or separate with the dry-type transformer static side mechanism. The bottom of the dry-type transformer body is correspondingly provided with a track wheel.

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