Dry-type transformer system

Abstract

An embodiment of the utility model 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 utility model, 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 risk of insulation aging of the contact is eliminated, and the reliability and safety of power supply of the data center are further improved.

Description

Technical Field

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

[0002] With the widespread adoption of information technology and artificial intelligence, data center power supply reliability and safety requirements are becoming increasingly stringent. When a dry-type transformer fails, rapid repair or replacement is essential to quickly restore power. Utility Model Content

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

[0004] In order to solve the above technical problems, an embodiment of the present utility model 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, 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.

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

[0006] Furthermore, 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 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 air outlet for blowing air toward the duckbill type moving contact, a contact temperature sensor electrically connected to the cooling fan assembly is provided on the moving contact frame, 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 link and a corresponding torque link fulcrum, one end of the torque link is connected to the piston rod, and the dynamic contact assembly is arranged at the other end of the torque link.

[0009] Furthermore, the moving contact assembly includes a moving contact insulator and a moving contact sliding plate provided on the moving contact insulator, and the static contact assembly includes a static contact insulator and a static contact sliding plate provided 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 portion 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 portion 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 through high-strength pressure elastic parts to achieve rapid disconnection or closing of the power supply side and the load side of the dry-type transformer; under high-current operation, the present invention starts or shuts down the air cooling according to the temperature change detected by the contact temperature sensor, eliminating the risk of contact insulation aging, thereby 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 utility model.

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

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

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

[0019] Figure 5 It is a schematic diagram of the application structure of the contact temperature sensor of the embodiment of the present utility model.

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

[0021] Figure 7 This is a schematic diagram of the main circuit when the cooling fan assembly of the embodiment of the utility model starts the heat exhaust fan.

[0022] Figure 8 This is a main circuit principle diagram when the cooling fan assembly of the embodiment of the utility model starts the heat exhaust fan and the air conditioning fan.

[0023] Explanation of Figure Numbers

[0024] 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-sensing liquid container 41, temperature-sensing liquid expansion tube 42, piston rod 43, torque link 44, torque link 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 and JD3, relays J1 and J2, disconnectors L1, L2 and L3, fuse FU1, contactors KM1 and KM2, thermal protection relays FR1 and FR2, exhaust fan M1, electrical compartment air conditioner cooling fan M2. DETAILED DESCRIPTION

[0025] It should be noted that, unless there is a conflict, the embodiments in this application and the features described in the embodiments can be combined with each other. The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] 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 and movement status of the various components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, in this utility model, the terms "first," "second," etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of these features.

[0028] 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.

[0029] The dry-type transformer body is equipped with a moving contact assembly, and the stationary side mechanism of the dry-type transformer is equipped with a corresponding stationary contact. The moving contact assembly consists of a duckbill moving contact, a moving contact frame, and a conductive base. The duckbill moving contact and the moving contact frame are mounted on the conductive base. The moving contact frame is equipped with an elastic member that applies pressure to both sides of the duckbill moving contact. The elastic member is composed of several compression springs. The conductive base, stationary contact, and duckbill moving contact are all made of copper, with the conductive base preferably being a copper flat plate.

[0030] As an embodiment, the surface of the static contact and the inner side of the duckbill moving contact are both plated with silver, and a graphite and electrical composite grease coating is applied to the silver layer. The duckbill moving contact consists of two opposing power head plates, with the front end of the power head plate forming the moving contact duckbill portion, and the corresponding static contact being T-shaped. The moving contact duckbill portion and the power head plate are both integrally formed copper components. The static contact is made of copper material, with a silver-plated outer layer and a graphite and electrical composite grease coating on the surface to isolate corrosive substances, reduce contact resistance, and reduce sliding resistance between the metal of the duckbill moving contact and the metal of the static contact, thereby preventing wear.

[0031] The elastic member preferably adopts 18 high-strength compression springs, which 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.

[0032] As an embodiment, the movable 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.

[0033] The movable contact assembly of this utility model is used on both the power supply side (i.e., the high-voltage side) and the load side (i.e., the low-voltage side) of the dry-type transformer body. To facilitate rapid maintenance and ensure personnel safety, the dry-type transformer can be pulled out of the compartment when maintenance or overhaul is required, replacing the traditional bolted busbar connection. This disconnects the power supply and allows for convenient and safe overhaul in the spacious exterior compartment. The dry-type transformer can also be used as a spare component, allowing for quick replacement in the event of a failure or maintenance, improving reliability while minimizing power outages and achieving significant economic benefits.

[0034] As an embodiment, 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 cooler, 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 cooler puts in cold air to quickly cool the contact. This can increase the high-current carrying capacity of the conductor and ensure the reliable and safe operation of the insulator during its service life.

[0035] Below the duckbill moving contact is a cooling air outlet for cooling the duckbill moving contact. Under the control of the contact temperature sensor, cooling air is automatically 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.

[0036] 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-sensing liquid container, a temperature-sensing liquid expansion tube, a transmission mechanism, a reset mechanism, a moving contact assembly, and a static contact assembly.

[0037] The temperature-sensing liquid expansion tube is connected to a temperature-sensing liquid container, which contains the temperature-sensing liquid. This temperature-sensing liquid can be a glycol mixture, and the temperature-sensing liquid container is preferably made of copper. The temperature-sensing liquid expansion tube houses a piston and a piston rod connected to the piston. As the temperature-sensing liquid heats up, it expands, pushing up the piston and driving the piston rod.

[0038] The piston rod drives the moving contact assembly to contact 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.

[0039] In one embodiment, the transmission mechanism includes a torque link and a corresponding torque link fulcrum, wherein one end of the torque link is connected to the piston rod, and the dynamic contact assembly is provided at the other end of the torque link. The middle portion of the torque link is rotatably connected to the torque link fulcrum.

[0040] The reset mechanism is a return spring, which acts on the torque link. If the return spring is a tension spring, it acts on the same side of the torque link as the piston rod. Conversely, if the return spring applies a test force to the torque link, it acts on the same side of the torque link as the moving contact assembly. When the temperature of the main power contact drops, the temperature of the temperature-sensing fluid also drops, and the spring tension returns the tie rod to its original position.

[0041] In one embodiment, the moving contact assembly includes a moving contact insulator and a moving contact sliding plate mounted on the moving contact insulator. Preferably, there are two moving contact sliding plates, with a pressure spring disposed between the two moving contact sliding plates. The static contact assembly includes a static contact insulator and a static contact sliding plate mounted on the static contact insulator. The moving contact sliding plate is provided with a moving contact, and the static contact sliding plate is provided with two corresponding static contacts spaced a predetermined distance apart. The present invention utilizes two static contacts to achieve two types of control. For example, when the temperature of the temperature-sensing liquid rises, the moving contact is driven to contact and connect with the front static contact JD2, activating the heat exhaust fan. As the temperature of the temperature-sensing liquid continues to rise, the moving contact is driven to contact and connect with the rear static contact JD3, activating the heat exhaust fan and the cooling fan for the electrical compartment air conditioner, which then delivers air to the main power contacts through the air duct. This automatically reduces the temperature of the main power contacts under high current conditions in the data center.

[0042] As an embodiment, the upper portion of the temperature-sensitive liquid container is hemispherical and the bottom is flat, the temperature-sensitive liquid expansion tube is connected to the upper portion of the temperature-sensitive liquid container, and the bottom is in contact with the moving contact frame.

[0043] In one embodiment, the dry-type transformer system also includes rails and a hydraulic drive mechanism for connecting or disconnecting the dry-type transformer body with the dry-type transformer's static side mechanism. Rail wheels are located on the bottom of the dry-type transformer body. The rails facilitate pulling the dry-type transformer body out for inspection or replacement.

[0044] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may 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 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. 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. The moving contact frame is provided with an elastic member that applies pressure to both sides of the duckbill moving contact.

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 both plated with a silver layer, on which a graphite and power composite grease coating is provided. The moving contact frame is a steel frame with a copper layer plated on the surface.

4. The dry-type transformer system according to claim 1, characterized in that: It also includes a cooling fan assembly, which includes a cooling air outlet for blowing air toward the duckbill moving contact. A contact temperature sensor electrically connected to the cooling fan assembly is provided on the moving contact frame. 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 is filled with temperature-sensitive liquid. The temperature-sensitive liquid expansion tube is filled 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.

5. The dry-type transformer system according to claim 4, characterized in that: 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 dynamic 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 static contact assembly comprises a static contact insulator and a static contact sliding plate arranged on the static contact insulator.

7. The dry-type transformer system according to claim 6, characterized in that: A moving contact is provided on the moving contact sliding plate, and two static contacts with a preset interval are correspondingly provided 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, which 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-sensing liquid container is hemispherical, and the bottom is flat. The temperature-sensing liquid expansion pipe is connected to the upper part of the temperature-sensing 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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