A load regulating transformer

Abstract

The utility model discloses a kind of on-load regulating transformer, including transformer shell, the top of the transformer shell is equipped with on-load tap changer, the wall body outside of transformer shell is equipped with even with distributed fin, still include dust removal mechanism;Dust removal mechanism: it includes fixed seat one, guide rod, sliding seat, annular tube one, gas outlet pipe, gas supply component, moving assembly and dust collection component, this on-load regulating transformer, by pneumatic element and pipeline layout, adopt high pressure gas blowing mode to clean and collect dust impurities adhered on on-load regulating transformer fin, avoid due to dust adhesion and lead to device itself heat dissipation efficiency drop, while device makes high pressure gas blowing position along fin vertical reciprocating movement by transmission element, by improving high pressure gas blowing coverage, and further improve the dust impurities removal effect of device to on-load regulating transformer fin.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, specifically to an on-load tap-changing transformer. Background Technology

[0002] A transformer is an electrical device that uses the principle of electromagnetic induction to change AC voltage. Its core function is to step up or step down voltage, while simultaneously achieving efficient transmission and distribution of electrical energy. A transformer incorporates an on-load tap changer to regulate voltage without interrupting its own load current. In the prior art, patent CN 210692325 U discloses a structure involving an on-load tap-changing transformer, including a corrugated oil tank. The upper surface of the corrugated oil tank has a tank cover, on which a thermometer, an oil level gauge, and an on-load tap changer are mounted. The corrugated oil tank contains transformer oil, and a switch control box is located on the side of the tank, connected to the on-load tap changer. The thermometer is mounted on the tank cover and passes through it to contact the transformer oil. One end of the oil level gauge is placed outside the tank cover, and the other end passes through the tank cover to contact the transformer oil. Both the thermometer and the oil level gauge are connected to the switch control box. The beneficial effects of this utility model are: reducing safety hazards, improving safety and reliability, good heat dissipation, high stability, and convenient installation and disassembly. This device uses heat sinks on the outside of the casing to dissipate heat from the transformer oil inside. However, the installation locations of on-load tap-changing transformers vary. If the on-load tap-changing transformer is exposed to the surrounding environment, dust and impurities will adhere to the surface of its heat sinks after long-term use. The adhesion of dust and impurities will reduce the contact area between the heat sinks and the external environment, resulting in a decrease in the heat dissipation rate of the heat sinks, which in turn weakens the heat dissipation effect of the on-load tap-changing transformer itself. Therefore, we propose an on-load tap-changing transformer. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide an on-load tap-changing transformer. This device uses pneumatic components and pipeline layout to clean and collect dust and impurities adhering to the heat sink of the on-load tap-changing transformer by high-pressure air blowing, thus avoiding the decrease in the device's own heat dissipation efficiency due to dust adhesion. At the same time, the device uses transmission components to make the high-pressure air blowing part move back and forth vertically along the heat sink, thereby increasing the coverage of high-pressure air blowing and improving the device's dust and impurity removal effect on the heat sink of the on-load tap-changing transformer. This can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an on-load tap-changing transformer, including a transformer housing, an on-load tap changer on the top of the transformer housing, evenly distributed heat sinks on the outer side of the transformer housing wall, and a dust removal mechanism.

[0005] The dust removal mechanism includes a fixed base, guide rods, slides, an annular tube, an air outlet pipe, an air supply component, a moving component, and a dust collection component. The fixed bases are vertically symmetrically arranged at the left and right ends of the rear side and the right end of the front side of the transformer shell. A guide rod is provided between two vertically adjacent fixed bases, and a slide is slidably connected to the outer side of each guide rod. An annular tube is provided between the slides, and an evenly distributed air outlet pipe runs through the inner arc wall of the annular tube. An air supply component and a moving component are provided between the transformer shell and the annular tube, and a dust collection component is provided between the air supply component and the transformer shell. This device uses pneumatic components and pipeline layout to clean and collect dust and impurities adhering to the heat sink of the on-load tap-changing transformer by high-pressure air blowing, avoiding a decrease in the device's own heat dissipation efficiency due to dust adhesion. At the same time, the device uses a transmission component to make the high-pressure air blowing part move back and forth vertically along the heat sink, thereby increasing the coverage area of ​​the high-pressure air blowing and improving the removal effect of dust and impurities on the heat sink of the on-load tap-changing transformer.

[0006] Furthermore, it also includes a microcontroller, which is located outside the transformer housing. The input terminal of the microcontroller is electrically connected to an external power supply, which facilitates the control of electrical components within the device.

[0007] Furthermore, the air supply assembly includes a protective shell, an air pump, and a hose. The protective shell is located on the upper side of the transformer shell, and the air pump is installed inside the protective shell. The input end of the air pump is electrically connected to the output end of the microcontroller, and the air outlet of the air pump is connected to a ring pipe through a hose. The dust and impurities adhering to the heat sink of the on-load tap-changing transformer are cleaned by high-pressure air blowing.

[0008] Furthermore, the moving component includes a second fixed base, a reciprocating screw, a motor, and a synchronous base. The second fixed base is vertically symmetrically arranged on the front left side of the transformer shell. The reciprocating screw is rotatably connected between the two fixed bases via bearings. The reciprocating screw is slidably connected to the synchronous base via crescent pins. The upper end of the synchronous base is fixedly connected to the outer arc surface of the annular tube. The motor is located on the top wall of the lower fixed base. The input end of the motor is electrically connected to the output end of the microcontroller. The output shaft of the motor is fixedly connected to the lower end of the reciprocating screw, thereby increasing the coverage of the high-pressure air blowing dust removal.

[0009] Furthermore, the moving component also includes bellows, which are respectively disposed between the fixed base two and the synchronous base. The bellows are movably sleeved on the outer end of the reciprocating screw to wrap, seal and lubricate the reciprocating screw of the on-load tap-changing transformer.

[0010] Furthermore, the dust collection assembly includes a connecting seat, a second annular tube, an air inlet pipe, a first connecting pipe, a dust collection box, and a second connecting pipe. The second annular tube is located at the lower outer side of the transformer shell via the connecting seat. The inner arc wall of the second annular tube is provided with evenly distributed air inlets. A dust collection box is located on the upper side of the shell. The second annular tube is connected to the front wall of the dust collection box via the first connecting pipe. The top wall of the dust collection box is connected to the air inlet of the air pump via the second connecting pipe. This assembly collects dust and impurities that fall off the heat sink of the on-load tap-changing transformer.

[0011] Furthermore, the dust collection assembly also includes a filter screen, which is located at the bottom front end of the connecting pipe 2 to prevent dust and impurities in the dust collection box of the on-load tap changer transformer from entering the air pump inlet through the connecting pipe 2.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This on-load tap-changing transformer has the following advantages:

[0013] After the on-load tap-changing transformer has been in use for a period of time, the device uses pneumatic components and piping layout to clean and collect the dust and impurities adhering to the heat sink of the on-load tap-changing transformer by high-pressure air blowing. This prevents the device's own heat dissipation efficiency from decreasing due to dust adhesion. By collecting the dust and impurities that have been cleaned off, the probability of these dust and impurities re-adhering to the heat sink is reduced. At the same time, the device uses transmission components to make the high-pressure air blowing part move back and forth vertically along the heat sink, thereby increasing the coverage area of ​​the high-pressure air blowing and thus improving the device's dust and impurity removal effect on the heat sink of the on-load tap-changing transformer. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the dust removal mechanism of this utility model.

[0016] In the diagram: 1 Transformer housing, 2 Microcontroller, 3 On-load tap changer, 4 Heat sink, 5 Dust removal mechanism, 51 Fixed base one, 52 Guide rod, 53 Slide, 54 Annular tube one, 55 Air outlet pipe, 56 Air supply assembly, 561 Protective housing, 562 Air pump, 563 Hose, 57 Moving assembly, 571 Fixed base two, 572 Reciprocating screw, 573 Motor, 574 Synchronizer seat, 575 Corrugated pipe, 58 Dust collection assembly, 581 Connecting seat, 582 Annular tube two, 583 Air inlet pipe, 584 Connecting pipe one, 585 Dust collection box, 586 Connecting pipe two, 587 Filter screen. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-2 This embodiment provides a technical solution: an on-load tap-changing transformer, including a transformer housing 1, an on-load tap changer 3 on the top of the transformer housing 1, and evenly distributed heat sinks 4 on the outer side of the wall of the transformer housing 1. It also includes a microcontroller 2 located outside the transformer housing 1, with its input terminal electrically connected to an external power supply. When the on-load tap-changing transformer is in use, the transformer housing 1 contains an iron core and windings. The iron core is made of stacked silicon steel sheets, serving as a magnetic circuit. The windings are divided into high-voltage and low-voltage sections, achieving voltage transformation through electromagnetic induction. The output terminal of the on-load tap changer 3 is connected to the tap of the transformer windings. The input terminal of the head is electrically connected, and the input terminal of the on-load tap changer 3 is electrically connected to the input circuit of the transformer. The on-load tap changer 3 is a voltage regulating device used to regulate the output voltage in the power transformer. It can switch the winding tap position and change the number of winding turns to achieve voltage regulation without interrupting the load current. The inside of the transformer shell 1 is filled with paraffin-based oil. The heat generated by the iron core and winding in the transformer shell 1 is transferred to the heat sink 4 through heat transfer via the paraffin-based oil. The heat sink 4 releases the heat to the external environment. The heat sink 4 can be made of aluminum alloy. It also includes a dust removal mechanism 5.

[0019] Dust removal mechanism 5 includes a fixed base 51, guide rods 52, slides 53, annular tube 54, air outlet pipes 55, air supply assembly 56, moving assembly 57, and dust collection assembly 58. The fixed bases 51 are vertically symmetrically arranged at the rear left and right ends and the front right end of the transformer housing 1. A guide rod 52 is provided between each two vertically adjacent fixed bases 51. Slides 53 are slidably connected to the outer sides of the guide rods 52. An annular tube 54 is provided between the slides 53. Evenly distributed air outlet pipes 55 penetrate the inner arc wall of the annular tube 54. An air supply assembly 56 and a moving assembly 57 are provided between the transformer housing 1 and the annular tube 54. A dust collection assembly 58 is provided between the air supply assembly 56 and the transformer housing 1. The air supply assembly 56 includes a protective shell 561 and an air pump 562. The housing 561 is located on the upper side of the transformer housing 1, and a hose 563 and a protective shell 561 are provided inside the protective shell 561. An air pump 562 is installed inside the protective shell 561. The input end of the air pump 562 is electrically connected to the output end of the microcontroller 2. The air outlet of the air pump 562 is connected to the first annular tube 54 via the hose 563. The dust collection assembly 58 includes a connecting seat 581, a second annular tube 582, an air inlet pipe 583, a first connecting pipe 584, a dust collection box 585, and a second connecting pipe 586. The second annular tube 582 is located on the lower outer side of the transformer housing 1 via the connecting seat 581. Evenly distributed air inlet pipes 583 penetrate the inner arc wall of the second annular tube 582. A dust collection box 585 is located on the upper side of the protective shell 561. The second annular tube 582 is connected to the front wall of the dust collection box 585 via the first connecting pipe 584. The top wall of component 5 is connected to the air inlet of air pump 562 via connecting pipe 2 586. The dust collection assembly 58 also includes a filter 587, which is located at the bottom front end of connecting pipe 2 586. After the on-load tap-changing transformer has been in use for a period of time, microcontroller 2 starts air pump 562. The operation of air pump 562 causes high-pressure gas from its outlet to be ejected through hose 563, annular pipe 1 54, and outlet pipe 55. Outlet pipe 55 is angled downwards, causing the high-pressure gas ejected from outlet pipe 55 to be angled downwards, thus cleaning dust and impurities adhering to the corresponding heat sink 4 with air. The clean airflow causes the dust and impurities that have fallen off the heat sink 4 to move downwards. During the operation of air pump 562, its air inlet is connected to connecting pipe 2 586, dust collection box 585, and connecting pipe... The annular pipe 584 and the ring pipe 582 generate a certain suction force in the air intake pipe 583, thereby attracting dust that has fallen onto the heat sink 4. This suction force collects the dust and impurities from the heat sink 4 into the dust collection box 585. The air entering the air pump 562 through the connecting pipe 586 is filtered for dust and impurities via a filter 587. The filter 587 is bolted between the dust collection box 585 and the connecting pipe 586 and can be removed for cleaning later. The filter 587 has a pore size of 30 micrometers. Regular cleaning of the dust collection box 585 prevents excessive dust accumulation. Dust cleaning is achieved by removing the cover plate fixed to the left side of the dust collection box 585 with screws. This device utilizes pneumatic components and piping layout.High-pressure air blowing is used to clean and collect dust and impurities adhering to the heat sink 4 of the on-load tap-changing transformer, preventing a decrease in the device's heat dissipation efficiency due to dust accumulation.

[0020] The moving component 57 includes a second fixed base 571, a reciprocating screw 572, a motor 573, and a synchronous base 574. The second fixed base 571 is vertically symmetrically arranged on the front left side of the transformer housing 1. The reciprocating screw 572 is rotatably connected between the second fixed bases 571 via bearings. The reciprocating screw 572 is slidably connected to the synchronous base 574 via crescent pins. The upper end of the synchronous base 574 is fixedly connected to the outer arc surface of the annular tube 54. The motor 573 is located on the top wall of the lower second fixed base 571. The input end of the motor 573... The output shaft of motor 573 is fixedly connected to the lower end of reciprocating screw 572, and is electrically connected to the output terminal of microcontroller 2. During the cleaning of dust and impurities on the surface of heat sink 4, microcontroller 2 starts motor 573, causing its output shaft to drive reciprocating screw 572 to rotate. During the rotation of reciprocating screw 572, the arc-shaped protrusion of crescent pin is embedded in the groove of the spiral groove of reciprocating screw 572. The curved surface contour of crescent pin is in close contact with the side wall of spiral groove, forming a sliding pair. The rotation of spiral groove will push crescent pin to move axially. The device moves in a linear reciprocating motion, which in turn drives the synchronous seat 574 to move vertically reciprocatingly via the crescent pin. The synchronous seat 574 drives the annular tube 54 to move vertically reciprocatingly, thereby vertically changing the position of the high-pressure airflow dust removal on the corresponding heat sink 4 via the air outlet 55, improving the high-pressure air blowing dust removal effect of the device on the heat sink 4. During the vertical reciprocating motion of the annular tube 54, it drives the slide 53 to slide adaptively along the outer arc surface of the corresponding guide rod 52. The sliding groove diameter of the slide 53 is the same as the circular cross-section of the guide rod 52. Through the sliding connection between the two, the vertical stability of the annular tube 54 is improved. During the cleaning of dust and impurities on the surface of the heat sink 4, the microcontroller 2 uses an internal timing element to ensure that the running time of the air pump 562 and the motor 573 is five minutes each time the dust and impurities on the surface of the heat sink 4 are cleaned. The device uses a transmission element to make the high-pressure air blowing part move vertically reciprocatingly along the heat sink 4, thereby improving the dust and impurity removal effect of the device on the heat sink 4 of the on-load tap-changing transformer by increasing the coverage of the high-pressure air blowing.

[0021] The moving component 57 also includes a bellows 575, which is respectively disposed between the fixed seat 571 and the synchronous seat 574. The bellows 575 are movably sleeved on the outer end of the reciprocating screw 572. The exposed end of the reciprocating screw 572 is wrapped, sealed and lubricated by the bellows 575. The bellows 575 is a corrugated structure made of multiple layers of metal sheets. Its working principle is to achieve self-adaptive sealing through elastic deformation to maintain good sealing performance.

[0022] The working principle of the on-load tap-changing transformer provided by this utility model is as follows: When in use, the transformer shell 1 contains an iron core and windings. The iron core is made of stacked silicon steel sheets, serving as a magnetic circuit. The windings are divided into high-voltage and low-voltage sections, achieving voltage transformation through electromagnetic induction. The output terminal of the on-load tap changer 3 is electrically connected to the input terminal of the transformer winding tap, and the input terminal of the on-load tap changer 3 is electrically connected to the transformer's input circuit. The on-load tap changer 3, as a voltage regulating device in the power transformer for adjusting the output voltage, can switch the winding tap positions and change the number of winding turns to achieve voltage regulation without interrupting the load current. The interior of the transformer shell 1 is filled with paraffin-based oil, which utilizes heat transfer to circulate heat within the transformer shell 1. The heat generated by the iron core and windings is transferred to the heat sink 4, and then released to the external environment through the heat sink 4. After the on-load tap-changing transformer has been in use for a period of time, the microcontroller 2 starts the air pump 562. The operation of the air pump 562 causes the high-pressure gas from its outlet to be ejected through the hose 563, the annular pipe 54, and the outlet pipe 55. The outlet pipe 55 is inclined downwards, so that the high-pressure gas ejected from the outlet pipe 55 is inclined downwards, which blows away the dust and impurities adhering to the corresponding heat sink 4. The clean airflow causes the dust and impurities that have fallen off the heat sink 4 to move downwards. During the operation of the air pump 562, its air inlet is connected to the inlet pipe 586, the dust collection box 585, the connecting pipe 584, and the annular pipe 582, which is connected to the inlet pipe 586. 3. A certain suction force is generated, which attracts the dust falling on the heat sink 4. This suction force collects the dust and impurities from the heat sink 4 into the dust collection box 585. The air entering the air pump 562 through the connecting pipe 2 586 is filtered for dust and impurities through the filter screen 587. The filter screen 587 is fixed between the dust collection box 585 and the connecting pipe 2 586 with bolts and can be removed for cleaning later. During the cleaning of dust and impurities on the surface of the heat sink 4, the microcontroller 2 starts the motor 573, which drives the reciprocating screw 572 to rotate. During the rotation of the reciprocating screw 572, the arc-shaped protrusion of the crescent pin is embedded in the groove of the spiral groove of the reciprocating screw 572, and the curved contour of the crescent pin is in close contact with the side wall of the spiral groove. The contact between the spiral groove and the axial movement of the spiral groove drives the crescent pin to move axially, achieving linear reciprocating motion. This, in turn, drives the synchronous seat 574 to move vertically, which in turn drives the annular tube 54 to move vertically. This vertically adjusts the position of the high-pressure airflow dust removal on the heat sink 4 via the exhaust pipe 55, improving the high-pressure airflow dust removal effect on the heat sink 4. During the vertical reciprocating movement of the annular tube 54, it drives the slide 53 to slide adaptively along the outer arc surface of the corresponding guide rod 52. The sliding groove diameter of the slide 53 is the same as the circular cross-section of the guide rod 52. Through the sliding connection between the two, the vertical stability of the annular tube 54 is improved. This process effectively removes dust and impurities from the surface of the heat sink 4.The microcontroller 2 uses an internal timing element to ensure that the air pump 562 and motor 573 run for five minutes each time dust and impurities are cleaned from the surface of the heat sink 4. The exposed end of the reciprocating lead screw 572 is sealed and lubricated via a bellows 575.

[0023] It is worth noting that the microcontroller 2 disclosed in the above embodiments can be an STC89C52, the on-load tap changer 3 can be an SDZV type oil-immersed vacuum on-load tap changer, the air pump 562 can be a 2RB710-7AH37 vortex air pump, and the motor 573 can be a 60SFM series servo motor. The microcontroller 2 controls the operation of the air pump 562 and the motor 573 using methods commonly used in the prior art.

[0024] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An on-load tap-changing transformer, comprising a transformer housing (1), wherein an on-load tap changer (3) is provided on the top of the transformer housing (1), and heat sinks (4) are evenly distributed on the outer side of the wall of the transformer housing (1), characterized in that: It also includes a dust removal mechanism (5); Dust removal mechanism (5): It includes a fixed seat (51), a guide rod (52), a slide (53), an annular tube (54), an air outlet (55), an air supply component (56), a moving component (57), and a dust collection component (58). The fixed seat (51) is vertically symmetrically arranged at the rear left and right ends and the front right end of the transformer shell (1). A guide rod (52) is provided between two vertically adjacent fixed seats (51). A slide (53) is slidably connected to the outer side of the guide rod (52). An annular tube (54) is provided between the slides (53). An evenly distributed air outlet (55) is provided through the inner arc wall of the annular tube (54). An air supply component (56) and a moving component (57) are provided between the transformer shell (1) and the annular tube (54). A dust collection component (58) is provided between the air supply component (56) and the transformer shell (1).

2. The on-load tap-changing transformer according to claim 1, characterized in that: It also includes a microcontroller (2), which is located outside the transformer housing (1), and the input terminal of the microcontroller (2) is electrically connected to an external power supply.

3. The on-load tap-changing transformer according to claim 2, characterized in that: The air supply assembly (56) includes a housing (561), an air pump (562), and a hose (563). The housing (561) is located on the upper side of the transformer housing (1). The air pump (562) is installed inside the housing (561). The input end of the air pump (562) is electrically connected to the output end of the microcontroller (2). The outlet of the air pump (562) is connected to the annular pipe (54) through the hose (563).

4. An on-load tap-changing transformer according to claim 2, characterized in that: The moving component (57) includes a fixed base two (571), a reciprocating screw (572), a motor (573), and a synchronous seat (574). The fixed base two (571) is vertically symmetrically arranged on the left side of the front side of the transformer shell (1). The reciprocating screw (572) is rotatably connected between the fixed base two (571) through bearings. The reciprocating screw (572) is slidably connected to the synchronous seat (574) through a crescent pin. The upper end of the synchronous seat (574) is fixedly connected to the outer arc surface of the annular tube one (54). The top wall of the lower fixed base two (571) is provided with a motor (573). The input end of the motor (573) is electrically connected to the output end of the microcontroller (2). The output shaft of the motor (573) is fixedly connected to the lower end of the reciprocating screw (572).

5. An on-load tap-changing transformer according to claim 4, characterized in that: The moving component (57) also includes a bellows (575), which is respectively disposed between the fixed seat (571) and the synchronous seat (574), and the bellows (575) is movably sleeved on the outer end of the reciprocating screw (572).

6. An on-load tap-changing transformer according to claim 3, characterized in that: The dust collection assembly (58) includes a connecting seat (581), a second annular pipe (582), an air inlet pipe (583), a first connecting pipe (584), a dust collection box (585), and a second connecting pipe (586). The second annular pipe (582) is located at the lower outer side of the transformer shell (1) through the connecting seat (581). The inner arc wall of the second annular pipe (582) is provided with a uniformly distributed air inlet pipe (583). The upper side of the protective shell (561) is provided with a dust collection box (585). The second annular pipe (582) is connected to the front wall of the dust collection box (585) through the first connecting pipe (584). The top wall of the dust collection box (585) is connected to the air inlet of the air pump (562) through the second connecting pipe (586).

7. An on-load tap-changing transformer according to claim 6, characterized in that: The dust collection assembly (58) also includes a filter (587), which is disposed at the bottom front end of the connecting pipe (586).

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