Three-phase dry-type transformer

Abstract

The invention discloses a three-phase dry-type transformer which comprises a base, an iron core, a lower clamping piece, an upper clamping piece, a pulling plate, a clamping screw rod, a nut, a low-voltage coil winding, a high-voltage coil winding, an insulating damping block, a high-voltage connecting lead, a low-voltage outlet copper bar, a high-voltage outlet terminal, a temperature sensor and an industrial router. An epoxy resin insulating cylinder is embedded in the inner circumferential wall of each of the low-voltage coil winding and the high-voltage coil winding, the temperature sensors are arranged on the low-voltage coil winding and the high-voltage coil winding, the temperature sensors are electrically connected with the industrial router, and the industrial router is in data connection with the rear-end management platform. According to the technical scheme, the insulation performance of the transformer can be effectively improved, electrical short circuit and electric leakage are prevented, efficient, safe and reliable electric energy conversion is achieved, high efficiency, low loss and good heat dissipation performance are achieved, temperature monitoring and early warning of the coil winding of the transformer can be achieved through the temperature sensor, and the service life of the transformer is prolonged. And the safety and the reliability of the transformer are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to a three-phase dry-type transformer. Background Art

[0002] A dry-type transformer refers to a transformer whose core and winding are not immersed in insulating oil. A three-phase dry-type transformer is the main component of various power supplies and electrical equipment. It is a device that uses the principle of electromagnetic induction to change the AC voltage. The main components are the primary coil, the secondary coil and the core (magnetic core). In electrical equipment and wireless circuits, it is often used to increase or decrease voltage, match impedance, and isolate safely. In a generator, whether the coil moves through the magnetic field or the magnetic field moves through the fixed coil, the potential can be induced in the coil. In both cases, the value of the magnetic flux remains unchanged, but the amount of magnetic flux interlinked with the coil changes. This is the principle of mutual induction. A transformer is a device that uses electromagnetic mutual induction to transform voltage, current and impedance. The safe operation and service life of a dry-type transformer depend to a large extent on the safety and reliability of the transformer winding insulation. The winding temperature exceeds the insulation tolerance temperature, causing insulation damage, which is one of the main reasons for the transformer's inability to work properly. Therefore, it is very important to monitor the operating temperature of the transformer and its alarm control.

[0003] However, most of the existing three-phase dry-type transformers on the market have less than ideal insulation performance, which affects the reliability and service life of the transformer, and do not have the function of monitoring the operating temperature of each of the three-phase windings, which is not conducive to the safe operation of the transformer. Summary of the invention

[0004] The main purpose of the present invention is to propose a three-phase dry-type transformer, aiming to solve the technical problems that the insulation performance of the existing three-phase dry-type transformer is not ideal, affecting the reliability and service life of the transformer, and the operating temperature of each of the three-phase windings cannot be monitored, which is not conducive to the safe operation of the transformer.

[0005] To achieve the above-mentioned purpose, the three-phase dry-type transformer proposed in the present invention includes a base, an iron core, a lower clamp, an upper clamp, a pull plate, a clamping screw, a nut, a low-voltage coil winding, a high-voltage coil winding, an insulating damping block, a high-voltage lead wire, a low-voltage outlet copper bar, a high-voltage outlet terminal, a temperature sensor and an industrial router. The base is arranged side by side on the left and right, the iron core is arranged at the upper end of the base, the lower clamp and the upper clamp are respectively arranged on the front and rear sides of the upper end and the lower end of the iron core, and the lower clamp and the upper clamp are used The iron core is clamped and fixed, the pull plate is vertically arranged at the front and rear ends of the iron core respectively, the upper and lower ends of the pull plate are detachably fixedly connected with the lower clamp and the upper clamp respectively, the clamping screw is respectively passed through the two ends of the lower clamp and the upper clamp and passed through the middle of the lower clamp and the upper clamp and the iron core, the nut is respectively screwed on the two ends of the clamping screw, the iron core is vertically provided with three winding posts, the low-voltage coil windings are respectively sleeved on the outer peripheral walls of the winding posts, and the high-voltage coil The windings are respectively sleeved on the outer circumferential wall of the low-voltage coil winding at intervals, and the inner circumferential walls of the low-voltage coil winding and the high-voltage coil winding are both embedded with an epoxy resin insulating cylinder. The gap between the outer circumferential wall of the low-voltage coil winding and the inner circumferential wall of the high-voltage coil winding forms a cooling air duct. The insulating shock-absorbing blocks are respectively arranged on the upper end wall and the lower end wall of the high-voltage coil winding, and the insulating shock-absorbing blocks are respectively fixedly connected to the upper end wall of the lower clamp and the lower end wall of the lower clamp. The two ends of the high-voltage lead are respectively electrically connected to the high-voltage coil winding, the low-voltage outlet copper bar and the high-voltage outlet terminal are respectively arranged on the outer side wall of the upper clamp, and the low-voltage outlet copper bar is respectively electrically connected to the low-voltage coil winding, and the high-voltage outlet terminal is respectively electrically connected to the high-voltage coil winding, and the temperature sensor is arranged on the low-voltage coil winding and the high-voltage coil winding, and the temperature sensor is electrically connected to the industrial router, and the industrial router is connected to the back-end management platform data through the built-in 5G communication module.

[0006] Optionally, both the low-voltage coil winding and the high-voltage coil winding are solid-insulated encapsulated windings.

[0007] Optionally, the insulating tube is a glass fiber reinforced epoxy resin insulating tube.

[0008] Optionally, the iron core is formed by stacking cold-rolled grain-oriented silicon steel sheets, and insulating material is provided between two adjacent silicon steel sheets.

[0009] Optionally, a fan-shaped buckle portion is respectively provided at both ends of the pull plate, and the inner side walls of the lower clamp and the upper clamp are respectively recessed with a fan-shaped buckle groove, and the fan-shaped buckle portion is detachably embedded in the fan-shaped buckle groove.

[0010] Optionally, the upper end wall of the insulating shock-absorbing block is respectively provided with a limiting column, the upper end wall and the lower end wall of the high-voltage coil winding are respectively provided with limiting holes, the limiting columns are respectively embedded in the limiting holes, the lower end wall of the insulating shock-absorbing block is respectively provided with a first bolt, the upper end part of the lower clamp and the lower end part of the lower clamp are respectively provided with a plurality of first waist-shaped holes, and the first bolts are respectively passed through the first waist-shaped holes.

[0011] Optionally, it also includes a second bolt, and the two ends of the upper end wall of the base are respectively recessed with a second waist-shaped hole extending along the length direction, and the two ends of the lower end of the lower clamp are respectively recessed with a bolt hole, and the second bolt is respectively passed through the second waist-shaped hole and the bolt hole.

[0012] Optionally, movable casters are also included, and the movable casters are rotatably arranged at both ends of the lower end of the base.

[0013] Optionally, a plurality of mounting holes are recessed at the lower end of the base.

[0014] Optionally, the temperature sensor is a pt100 temperature sensor.

[0015] The technical solution of the present invention has the following beneficial effects: the technical solution of the present invention, through the high-voltage coil windings are respectively sleeved on the outer peripheral wall of the low-voltage coil windings at intervals, the inner peripheral walls of the low-voltage coil windings and the high-voltage coil windings are both embedded with an epoxy resin insulating tube, the gap between the outer peripheral wall of the low-voltage coil winding and the inner peripheral wall of the high-voltage coil winding forms a cooling air duct, the insulating shock-absorbing blocks are respectively arranged on the upper end wall and the lower end wall of the high-voltage coil winding, and the insulating shock-absorbing blocks are respectively fixedly connected to the upper end wall of the lower clamp and the lower end wall of the lower clamp, the two ends of the high-voltage lead wire are respectively electrically connected to the high-voltage coil winding, the low-voltage outlet copper bar and the high-voltage outlet terminal are respectively arranged on the outer side wall of the upper clamp, and the low-voltage outlet copper bar is respectively electrically connected to the low-voltage coil winding, and the high-voltage outlet terminal is respectively electrically connected to the high-voltage coil winding The temperature sensor is set on the low-voltage coil winding and the high-voltage coil winding. The temperature sensor is electrically connected to the industrial router. The industrial router is connected to the back-end management platform data through the built-in 5G communication module, thereby effectively improving the insulation performance of the transformer, improving the safety and reliability of the transformer, preventing electrical short circuits and leakage, and realizing efficient, safe and reliable power conversion. It has high efficiency and low loss, good heat dissipation performance, and is suitable for high-load operation occasions. It has a compact structure, low vibration, low noise during operation, high reliability and long service life. The temperature sensor is used to monitor the operating temperature of each three-phase winding in real time online, and it is uploaded to the back-end management platform through the industrial router to realize temperature monitoring and early warning of the transformer coil winding, effectively improving the safety of transformer use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of a three-phase dry-type transformer according to an embodiment of the present invention; Figure 2 A schematic diagram of the overall structure of a three-phase dry-type transformer from another perspective according to an embodiment of the present invention; Figure 3 A partially exploded structural schematic diagram of a three-phase dry-type transformer according to an embodiment of the present invention; Figure 4 It is another partial exploded structural schematic diagram of a three-phase dry-type transformer according to an embodiment of the present invention; Figure 5 The present invention is a schematic structural diagram of a temperature sensor for a three-phase dry-type transformer according to an embodiment of the present invention.

[0018] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] 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.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention 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.

[0021] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] The invention provides a three-phase dry-type transformer.

[0023] like Figures 1 to 5 As shown, in one embodiment of the present invention, the three-phase dry-type transformer includes a base 101, an iron core 102, a lower clamp 103, an upper clamp 104, a pull plate 105, a clamping screw (not shown), a nut (not shown), a low-voltage coil winding 106, a high-voltage coil winding 107, an insulating damping block 108, a high-voltage lead wire 109, a low-voltage outlet copper bar 110, a high-voltage outlet terminal (not shown), a temperature sensor 111 and an industrial router (not shown), the base 101 is arranged side by side on the left and right, the iron core 102 is arranged at the upper end of the base 101, and the lower clamp 103 and the upper clamp 104 are respectively arranged at the front of the upper end and the lower end of the iron core 102. On the rear two sides, the lower clamp 103 and the upper clamp 104 are used to clamp and fix the iron core 102, and the pull plate 105 is vertically arranged at the front and rear ends of the iron core 102 respectively. The upper and lower ends of the pull plate 105 are detachably fixedly connected with the lower clamp 103 and the upper clamp 104 respectively. The clamping screws are respectively passed through the two ends of the lower clamp 103 and the upper clamp 104 and the middle of the lower clamp 103 and the upper clamp 104 and the iron core 102. The nuts are respectively screwed on the two ends of the clamping screws. The iron core 102 is vertically provided with three winding posts. The low-voltage coil windings 106 are respectively sleeved on the outer peripheral walls of the winding posts, and the high-voltage coil windings 107 are respectively sleeved on the low-voltage coil windings at intervals. On the outer peripheral wall of 106, the inner peripheral wall of the low-voltage coil winding 106 and the high-voltage coil winding 107 are both embedded with an epoxy resin insulating cylinder (not shown), which can effectively isolate the low-voltage coil winding 106 and the high-voltage coil winding 107, improve the safety and reliability of the transformer, prevent electrical short circuits and leakage, and achieve efficient, safe and reliable power conversion. The gap between the outer peripheral wall of the low-voltage coil winding 106 and the inner peripheral wall of the high-voltage coil winding 107 forms a cooling air duct, which makes the heat dissipation performance of the transformer good and helps to reduce eddy current losses. The insulating damping blocks 108 are respectively arranged on the upper end wall and the lower end wall of the high-voltage coil winding 107, and the insulating damping blocks 108 are respectively fixedly connected to the upper end wall of the lower clamp 103 and the lower end wall of the lower clamp 104, the two ends of the high-voltage lead wire 109 are respectively electrically connected to the high-voltage coil winding 107, the low-voltage outlet copper bus 110 and the high-voltage outlet terminal are respectively arranged on the outer side wall of the upper clamp 104, and the low-voltage outlet copper bus 110 is respectively electrically connected to the low-voltage coil winding 106, and the high-voltage outlet terminal is respectively electrically connected to the high-voltage coil winding 107, the temperature sensor 111 is arranged on the low-voltage coil winding 106 and the high-voltage coil winding 107, the temperature sensor 111 is electrically connected to the industrial router, and the industrial router is connected to the back-end management platform data through the built-in 5G communication module.

[0024] Specifically, the low-voltage coil winding 106 and the high-voltage coil winding 107 are both solid-insulated encapsulated windings. The epoxy resin forms a solid structure after curing, which can effectively protect the windings and the core. The epoxy resin layer effectively isolates water and moisture and has high mechanical strength and electrical properties, making the transformer run stably with a low failure rate.

[0025] Specifically, the insulating cylinder is a glass fiber reinforced epoxy resin insulating cylinder with excellent insulating properties.

[0026] Specifically, the iron core 102 is formed by stacking cold-rolled grain-oriented silicon steel sheets, which has the advantages of low static power consumption and high working efficiency. Insulating materials are provided between two adjacent silicon steel sheets to reduce the loss and noise of the iron core.

[0027] Specifically, a fan-shaped snap-in portion 1051 is respectively provided at both ends of the pull plate 105 , and a fan-shaped snap-in groove 112 is respectively recessed on the inner side walls of the lower clamp 103 and the upper clamp 104 , and the fan-shaped snap-in portion 1051 is respectively detachably embedded in the fan-shaped snap-in groove 112 .

[0028] Specifically, the upper end wall of the insulating shock-absorbing block 108 is respectively provided with a limiting column 1081, the upper end wall and the lower end wall of the high-voltage coil winding 107 are respectively provided with limiting holes (not shown in the figure), the limiting columns 1081 are respectively embedded in the limiting holes, the lower end wall of the insulating shock-absorbing block 108 is respectively provided with a first bolt 1082, the upper end part of the lower clamp 103 and the lower end part of the lower clamp are respectively provided with a plurality of first waist-shaped holes (not shown in the figure), and the first bolts 1082 are respectively passed through the first waist-shaped holes.

[0029] Specifically, it also includes a second bolt 113. The two ends of the upper end wall of the base 101 are respectively recessed with a second waist-shaped hole 1011 extending along the length direction, and the two ends of the lower end of the lower clamp 103 are respectively recessed with a bolt hole (not shown), and the second bolt 113 is respectively passed through the second waist-shaped hole 1011 and the bolt hole.

[0030] Specifically, it also includes movable casters 114 , which are rotatably disposed at both ends of the lower end of the base 101 .

[0031] Specifically, a plurality of mounting holes 1012 are recessed at the lower end of the base 101 .

[0032] Specifically, the temperature sensor 111 adopts a pt100 temperature sensor.

[0033] Specifically, the working principle and process of the present invention are: The high-voltage coil windings are sleeved on the outer circumferential wall of the low-voltage coil windings at intervals, and the inner circumferential walls of the low-voltage coil windings and the high-voltage coil windings are both embedded with an epoxy resin insulating tube. The gap between the outer circumferential wall of the low-voltage coil winding and the inner circumferential wall of the high-voltage coil winding forms a cooling air duct. The insulating shock-absorbing blocks are respectively arranged on the upper end wall and the lower end wall of the high-voltage coil winding, and the insulating shock-absorbing blocks are respectively fixedly connected to the upper end wall of the lower clamp and the lower end wall of the lower clamp. The two ends of the high-voltage lead wire are respectively electrically connected to the high-voltage coil winding, the low-voltage outlet copper bar and the high-voltage outlet terminal are respectively arranged on the outer side wall of the upper clamp, and the low-voltage outlet copper bar is respectively electrically connected to the low-voltage coil winding, and the high-voltage outlet terminal is respectively electrically connected to the high-voltage coil winding, and the temperature sensor is arranged on the low-voltage coil winding. The temperature sensor is electrically connected to the industrial router on the high-voltage coil winding. The industrial router is connected to the back-end management platform data through the built-in 5G communication module, thereby effectively improving the insulation performance of the transformer, improving the safety and reliability of the transformer, preventing electrical short circuits and leakage, and realizing efficient, safe and reliable power conversion. It has high efficiency and low loss, good heat dissipation performance, and is suitable for high-load operation occasions. It has a compact structure, low vibration, low noise during operation, high reliability and long service life. The temperature sensor is used to monitor the operating temperature of each three-phase winding in real time online, and it is uploaded to the back-end management platform through the industrial router to realize temperature monitoring and early warning of the transformer coil winding, effectively improving the safety of transformer use.

[0034] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A three-phase dry-type transformer, characterized in that: The invention comprises a base, an iron core, a lower clamp, an upper clamp, a pull plate, a clamping screw, a nut, a low-voltage coil winding, a high-voltage coil winding, an insulating damping block, a high-voltage lead wire, a low-voltage outlet copper bar, a high-voltage outlet terminal, a temperature sensor and an industrial router. The base is arranged side by side on the left and right, the iron core is arranged at the upper end of the base, the lower clamp and the upper clamp are respectively arranged on the front and rear sides of the upper end and the lower end of the iron core, the lower clamp and the upper clamp are used to clamp and fix the iron core, and the pull plates are respectively arranged vertically. The iron core is vertically arranged at the front and rear ends of the iron core, the upper and lower ends of the pull plate are respectively detachably fixedly connected to the lower clamp and the upper clamp, the clamping screws are respectively passed through the two ends of the lower clamp and the upper clamp, and passed through the middle of the lower clamp and the upper clamp and the iron core, the nuts are respectively screwed on the two ends of the clamping screws, the iron core is vertically provided with three winding posts, the low-voltage coil windings are respectively sleeved on the outer peripheral walls of the winding posts, and the high-voltage coil windings are respectively sleeved at intervals. On the outer circumferential wall of the low-voltage coil winding, the inner circumferential walls of the low-voltage coil winding and the high-voltage coil winding are both embedded with an epoxy resin insulating cylinder, and the gap between the outer circumferential wall of the low-voltage coil winding and the inner circumferential wall of the high-voltage coil winding forms a cooling air duct, the insulating shock-absorbing blocks are respectively arranged on the upper end wall and the lower end wall of the high-voltage coil winding, and the insulating shock-absorbing blocks are respectively fixedly connected to the upper end wall of the lower clamp and the lower end wall of the lower clamp, the two ends of the high-voltage lead are respectively electrically connected to the high-voltage coil winding, the low-voltage outlet copper bar and the high-voltage outlet terminal are respectively arranged on the outer side wall of the upper clamp, and the low-voltage outlet copper bar is respectively electrically connected to the low-voltage coil winding, and the high-voltage outlet terminal is respectively electrically connected to the high-voltage coil winding, the temperature sensor is arranged on the low-voltage coil winding and the high-voltage coil winding, the temperature sensor is electrically connected to the industrial router, and the industrial router is connected to the back-end management platform data through the built-in 5G communication module.

2. The three-phase dry-type transformer according to claim 1, characterized in that: The low-voltage coil winding and the high-voltage coil winding are both solid-insulated encapsulated windings.

3. The three-phase dry-type transformer according to claim 1, characterized in that: The insulating cylinder is a glass fiber reinforced epoxy resin insulating cylinder.

4. The three-phase dry-type transformer according to claim 1, characterized in that: The iron core is formed by stacking cold-rolled grain-oriented silicon steel sheets, and insulating materials are provided between two adjacent silicon steel sheets.

5. The three-phase dry-type transformer according to claim 1, characterized in that: A fan-shaped buckle portion is respectively provided at both ends of the pull plate, and a fan-shaped buckle groove is respectively recessed on the inner side walls of the lower clamp and the upper clamp, and the fan-shaped buckle portion is respectively detachably embedded in the fan-shaped buckle groove.

6. The three-phase dry-type transformer according to claim 1, characterized in that: The upper end wall of the insulating shock-absorbing block is respectively provided with a limiting column, the upper end wall and the lower end wall of the high-voltage coil winding are respectively provided with limiting holes, the limiting columns are respectively embedded in the limiting holes, the lower end wall of the insulating shock-absorbing block is respectively provided with a first bolt, the upper end part of the lower clamp and the lower end part of the lower clamp are respectively provided with a plurality of first waist-shaped holes, and the first bolts are respectively passed through the first waist-shaped holes.

7. The three-phase dry-type transformer according to claim 1, characterized in that: It also includes a second bolt, and the two ends of the upper end wall of the base are respectively recessed with a second waist-shaped hole extending along the length direction, and the two ends of the lower end of the lower clamp are respectively recessed with a bolt hole, and the second bolt is respectively passed through the second waist-shaped hole and the bolt hole.

8. The three-phase dry-type transformer according to claim 1, characterized in that: It also includes movable casters, which are rotatably arranged at both ends of the lower end of the base.

9. The three-phase dry-type transformer according to claim 1, characterized in that: A plurality of mounting holes are recessed at the lower end of the base.

10. The three-phase dry-type transformer according to claim 1, characterized in that: The temperature sensor adopts pt100 temperature sensor.

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