An automatic cleaning device for the cooler of an oil-circulating air-cooled main transformer

Abstract

The present invention provides an automatic cleaning device for an oil-circulating air-cooled main transformer cooler, comprising a cooler, a plurality of fans provided on one side of the cooler, a cleaning rack provided on the other side of the cooler, a sliding propeller provided on the cleaning rack, a cleaning device provided at one end of the propeller, a plurality of buffer devices at the bottom of the cleaning rack, and a plurality of magnets at the top of the cleaning rack. This device is a fully automatic cleaning device, and the operation process is fully mechanized and does not require any manual intervention; it has a high degree of automation. This device can perform online cleaning of a running cooler without affecting the operation of other surrounding equipment and without safety risks. This device utilizes wind power, gravity and related mechanical designs in a comprehensive manner, and does not require water or electricity during use, thus saving energy. The wind energy generated by the fan can not only be used for heat dissipation, but also provides kinetic energy for the propeller. This device does not generate wastewater, is very energy-saving and environmentally friendly, and has great promotion value.

Description

Technical Field

[0001] The invention relates to the field of transformer cleaning, in particular to an automatic cleaning device for an oil-circulating air-cooled main transformer cooler. Background Art

[0002] The power station is equipped with multiple 500kV main transformers. The electricity generated by the generator sets is boosted by the main transformers before being transmitted to the grid. Heat generated during operation by the main transformers is first transferred to the transformer oil. This heat is then cooled by a cooler, removing the heat generated by the main transformer. An oil pump then pumps the oil from the transformer tank into the cooler for cooling. The cooled oil then returns to the transformer tank, repeating the cycle.

[0003] The cooler is air-cooled, with a cooling fan on one side and an air intake surface on the other. When the cooler is running, the cooling fan draws air through the intake surface, rapidly cooling the transformer oil as it passes through the cooler.

[0004] As the running time increases, the air inlet surface of the cooler is easily blocked by dust, mosquitoes, etc., resulting in a decrease in the cooling effect of the cooler, thereby affecting the safe operation of the main transformer. Staff are required to frequently flush it with a water gun. The disadvantages of this method are: 1. Cleaning is entirely manual, and the level of mechanization and automation is too low, resulting in insufficient human resources. 2. The existing technology has safety risks. When using a water gun to flush the cooler, even if the running cooler is shut down, there is a safety risk that the water flow of the water gun may accidentally hit other coolers or transformer instruments. 3. The existing cleaning method produces a large amount of sewage and is not environmentally friendly. For this reason, we propose an automatic cleaning device for oil-circulating air-cooled main transformer cooler to solve the above problems. Summary of the Invention

[0005] The present invention provides an automatic cleaning device for an oil-circulating air-cooled main transformer cooler, which solves the problems of low mechanization and automation levels in cleaning the air inlet surface of the cooler, safety risks posed by flushing the cooler with a water gun, and the generation of a large amount of sewage by the water gun, which is not environmentally friendly.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: an automatic cleaning device for an oil-circulating air-cooled main transformer cooler, comprising a cooler, a plurality of fans being provided on one side of the cooler, a cleaning rack being provided on the other side of the cooler, a sliding propeller being provided on the cleaning rack, a cleaning device being provided at one end of the propeller, a plurality of buffer devices being provided at the bottom of the cleaning rack, and a plurality of magnets being provided at the top of the cleaning rack.

[0007] In a preferred solution, an oil inlet pipe is provided on the top of the cooler, an oil outlet pipe is provided on the bottom of the cooler, an air inlet filter is provided in the air inlet direction of the cooler, and multiple fans are provided in the air outlet direction of the cooler.

[0008] In the preferred solution, a guide rod is provided on the cleaning rack, flat bottom grooves are provided on both sides of the cleaning rack, internal threads are provided on the flat bottom grooves, a nut is provided on one side of the flat bottom grooves, the magnet rests on the flat bottom grooves, and the internal threads are threadedly connected to the nut.

[0009] In a preferred solution, the propeller includes an upper propeller and a lower propeller, locking devices are provided at both ends of the lower propeller, and the upper propeller slides against the lower propeller.

[0010] In a preferred solution, the upper thruster is a hollow structure, the top of the upper thruster is an arc-shaped surface, a first through hole is provided on the upper thruster, the guide rod rests on the first through hole, and limit plates are provided at both ends of the upper thruster.

[0011] In the preferred solution, the lower thruster is a hollow cabinet, a second through hole is provided on the lower thruster, third through holes are provided at both ends of the lower thruster, the guide rod rests on the second through hole, mounting grooves are provided at both ends of the lower thruster, and the locking device is installed on the mounting grooves.

[0012] In a preferred embodiment, the locking device includes an outer sliding sleeve, a second spring is provided in the outer sliding sleeve, and a metal triangular head is provided at one end of the second spring;

[0013] When the bottom of the upper pusher extends to a position higher than the height of the locking device, the metal triangular head pops out under the action of the second spring and the pusher opens;

[0014] When the locking device is lifted to the height of the magnet, the metal triangular head retracts under the action of the magnet, and the upper thruster retracts under the action of gravity.

[0015] In a preferred solution, the cleaning device includes a plurality of brushes, a rolling bearing is provided between two brushes, a slightly sticky silicone tube is wrapped around the rolling bearing, and bearing seats are provided at both ends of the rolling bearing.

[0016] In a preferred embodiment, the buffer device includes a housing, a piston is provided in the housing, a push rod is provided at one end of the piston, and a first spring is provided between the piston and the housing;

[0017] When the propeller descends, the push rod passes through the third through hole and abuts against the inner wall of the arc surface.

[0018] The beneficial effects of the present invention are as follows: when the propeller is at the bottom position, the propeller opens under the action of multiple buffer devices. Under the action of wind, a pressure difference between the upper and lower parts of the propeller is generated, causing the propeller to rise. When the propeller rises to the position of the magnet, the propeller closes under the action of the magnet, causing the propeller to fall. This causes the cleaning device on one side of the propeller to reciprocate up and down, completing the cleaning cycle of the air intake filter.

[0019] This device is a fully automatic cleaning device, and its operation process is fully mechanized and does not require any human intervention; it has a high degree of automation. This device can clean the running cooler online without affecting the operation of other surrounding equipment and without any safety risks. Through the comprehensive utilization of wind power, gravity and related mechanical design, this device does not require water or electricity during use, saving energy. The wind energy generated by the fan can not only be used for heat dissipation, but also provide kinetic energy for the propeller, and the energy is efficiently utilized. This device does not produce wastewater, is very energy-saving and environmentally friendly, and has great promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and examples;

[0021] Figure 1 It is an axonometric view of the overall structure of the present invention;

[0022] Figure 2 It is an axonometric view of the overall structure of the present invention from another perspective;

[0023] Figure 3 It is a side view of the overall structure of the present invention;

[0024] Figure 4 It is an axonometric view of a partial structure of the present invention;

[0025] Figure 5 is an axonometric view of the propeller and the pollution removal device of the present invention;

[0026] Figure 6 is an axonometric view of the propeller and the pollution cleaning device of the present invention from another perspective;

[0027] Figure 7 is a cross-sectional view of the propeller and the pollution cleaning device of the present invention;

[0028] Figure 8 It is an exploded view of a local structure of the present invention;

[0029] Figure 9 is a cross-sectional view of the buffer device of the present invention;

[0030] Figure 10 is a cross-sectional view of the locking device of the present invention;

[0031] In the figure: cooler 1; oil inlet pipe 101; oil outlet pipe 102; fan 2; cleaning rack 3; guide rod 301; nut 302; flat bottom groove 303; internal thread 304; propeller 4; upper propeller 401; first through hole 4011; limit plate 4012; arc surface 4013; lower propeller 402; second through hole 4021; third through hole 4022; mounting groove 4023; buffer device 5; housing 501; push rod 502; piston 503; first spring 504; cleaning device 6; brush 601; rolling bearing 602; slightly sticky silicone tube 603; bearing seat 604; magnet 7; locking device 8; outer sleeve 801; metal triangular head 802; second spring 803; air intake filter 9. DETAILED DESCRIPTION

[0032] Example 1:

[0033] like Figure 1-10 An automatic cleaning device for an oil-circulating air-cooled main transformer cooler is disclosed. The device comprises a cooler 1, with multiple fans 2 provided on one side of the cooler 1 and a cleaning rack 3 provided on the other side. The cleaning rack 3 is provided with a sliding propeller 4, a cleaning device 6 is provided at one end of the propeller 4, multiple buffer devices 5 are provided at the bottom of the cleaning rack 3, and multiple magnets 7 are provided at the top of the cleaning rack 3. With this structure, when the propeller 4 is at the bottom position, the multiple buffer devices 5 act to open the propeller 4. The wind creates a pressure difference between the upper and lower parts of the propeller 4, causing the propeller 4 to rise. When the propeller 4 rises to the position of the magnet 7, the magnet 7 acts to close the propeller 4, causing the propeller 4 to descend. This causes the cleaning device 6 on one side of the propeller 4 to reciprocate up and down, completing the cleaning cycle of the air intake filter 9.

[0034] This device is a fully automatic cleaning device, and the use process is fully mechanized and does not require any human intervention; it has a high degree of automation.

[0035] This device can clean the running cooler online without affecting the operation of other surrounding equipment and without any safety risks.

[0036] This device makes comprehensive use of wind, gravity and related mechanical designs, and does not require water or electricity during use, thus saving energy. The wind energy generated by the fan 2 can not only be used for heat dissipation, but also provide kinetic energy for the propeller 4. Energy is used efficiently, and this device does not produce wastewater, making it very energy-saving and environmentally friendly.

[0037] In the preferred embodiment, an oil inlet pipe 101 is provided at the top of cooler 1, an oil outlet pipe 102 is provided at the bottom of cooler 1, an air inlet filter 9 is provided on the air inlet side of cooler 1, and multiple fans 2 are provided on the air outlet side of cooler 1. With this structure, the device utilizes wind power, gravity, and related mechanical design, completely eliminating the need for water or electricity during use, thus saving energy. The wind energy generated by fans 2 is not only used for heat dissipation, but also provides kinetic energy for propeller 4, achieving efficient energy utilization.

[0038] In a preferred embodiment, the cleaning rack 3 is provided with guide rods 301, and flat-bottomed grooves 303 are provided on both sides of the cleaning rack 3. The flat-bottomed grooves 303 are provided with internal threads 304. A nut 302 is provided on one side of the flat-bottomed grooves 303. The magnet 7 rests against the flat-bottomed grooves 303, and the internal threads 304 are threadedly connected to the nut 302. With this structure, the internal threads 304 are threadedly connected to the nut 302, making the installation and replacement of the magnet 7 convenient and quick. The flat-bottomed grooves 303 are located at the top of the cleaning rack 3, so that the cleaning device 6 can cover the top of the air intake filter 9.

[0039] In a preferred embodiment, the propeller 4 includes an upper propeller 401 and a lower propeller 402. Locking devices 8 are provided at both ends of the lower propeller 402, and the upper propeller 401 slides against the lower propeller 402. With this structure, when the propeller 4 is at the bottom position, the propeller 4 is opened under the action of the multiple buffer devices 5, and the metal triangular head 802 in the locking device 8 extends to keep the propeller 4 in the open state.

[0040] In the preferred embodiment, the upper propeller 401 is a hollow structure, with a curved surface 4013 at the top. A first through-hole 4011 is provided on the upper propeller 401, against which the guide rod 301 abuts. Limiting plates 4012 are provided at both ends of the upper propeller 401. With this structure, due to the curved design of the upper propeller 401, a pressure difference exists above and below the propeller 4, generating an upward lift force below the propeller 4, similar to the takeoff principle of an airplane wing (see Bernoulli's principle for details), causing the propeller 4 to rise under the action of the fan 2.

[0041] In a preferred embodiment, the lower pusher 402 is a hollow cabinet, with a second through hole 4021 formed in the lower pusher 402 and third through holes 4022 formed at both ends of the lower pusher 402. The guide rod 301 abuts against the second through hole 4021. The lower pusher 402 has mounting grooves 4023 at both ends, and the locking device 8 is mounted on the mounting grooves 4023. With this structure, when the guide rod 301 abuts against the inner wall of the lower pusher 402, the upper pusher 401 extends, and the guide rod 301 guides the pusher 4 as it rises and falls.

[0042] In a preferred embodiment, the locking device 8 includes an outer sleeve 801 , a second spring 803 is provided in the outer sleeve 801 , and a metal triangular head 802 is provided at one end of the second spring 803 ;

[0043] When the bottom of the upper pusher 401 extends to a position higher than the height of the locking device 8, the metal triangular head 802 pops out under the action of the second spring 803, and the pusher 4 opens;

[0044] When the locking device 8 is lifted to the height of the magnet 7, the metal triangular head 802 retracts under the action of the magnet 7, and the upper thruster 401 retracts under the action of gravity. With this structure, when the locking device 8 on the thruster 4 is lifted to the height of the magnet 7, the metal triangular head 802 retracts under the action of the magnet 7, and the upper thruster 401 retracts under the action of gravity. Due to the gravity of the thruster 4 itself, the upper thruster 401 is lifted up by the push rod 502, which squeezes the metal triangular head 802 of the locking device 8, overcoming the second spring 803 at the tail of the locking device 8 and squeezing it back into the mounting hole of the locking device 8. When the upper thruster 401 is completely pushed out, the metal triangular head 802 loses its squeezing force and automatically pops out under the action of the second spring 803, supporting the upper thruster 401 from retracting.

[0045] In the preferred embodiment, the cleaning device 6 includes a plurality of brushes 601, a rolling bearing 602 is provided between two brushes 601, a slightly sticky silicone tube 603 is wound around the rolling bearing 602, and a bearing seat 604 is provided at both ends of the rolling bearing 602. With this structure, the function of the soft brush 601 is mainly to clean out the dirt on the air inlet surface of the cooler 1 and take it away through the slightly sticky silicone tube 603. The slightly sticky silicone tube 603 is fixed on the rolling bearing 602, and its interior should have a certain strength so that it can be reliably arranged on the rolling bearings at both ends of the cleaning device 6. Its length is consistent with the width of the cleaning surface of the cooler 1. Its main function is to carry the dust and other dirt swept out by the soft brush 601 away from the air inlet surface of the cooler 1 by rolling and using the viscosity of the silicone, and it needs to be replaced regularly.

[0046] In a preferred embodiment, the buffer device 5 includes a housing 501, a piston 503 is provided in the housing 501, a push rod 502 is provided at one end of the piston 503, and a first spring 504 is provided between the piston 503 and the housing 501;

[0047] When the propeller 4 descends, the push rod 502 passes through the third through hole 4022 and abuts against the inner wall of the arc surface 4013. According to this structure, when the propeller 4 is at the bottom position, the propeller 4 is opened under the action of the multiple buffer devices 5.

[0048] Example 2:

[0049] Further illustrate with reference to Example 1:

[0050] When the propeller 4 descends to the bottom of the cleaning rack 3 due to gravity, the upper propeller 401 of the propeller 4 extends under the action of the push rod 502 in the buffer device 5, causing the upper propeller 401 to extend relative to the lower propeller 402, thereby causing the metal triangular head 802 in the locking device 8 to extend under the action of the second spring 803, so that the metal triangular head 802 is stuck to the bottom of the upper propeller 401, so that the propeller 4 remains in the open state. When the upper propeller 401 extends beyond the lower propeller 402, the top surface of the upper propeller 401 is a curved surface 4013. Under the influence of wind, the entire propeller 4 begins to rise. Due to the curved design of the upper propeller 401, there will be a pressure difference between the upper and lower parts of the propeller 4, and an upward lift will be generated below the propeller 4, which is equivalent to the takeoff principle of an airplane wing. For details, please refer to Bernoulli's principle. When the locking device 8 on the propeller 4 is raised to the height of the magnet 7, the metal triangular head 802 retracts under the action of the magnet 7, and the upper propeller 401 retracts under the action of gravity. The upper and lower shapes of the propeller 4 are basically the same, and the pressure is basically the same, so the propeller 4 loses the lifting force. Under the action of its own gravity, the propeller 4 will drop rapidly, and the descent process will drive the cleaning device 6 to start working. When the propeller 4 drops to the bottom position of the cooler 1, under the action of the propeller 4's own gravity and the downward inertia, the bottom push rod 502 will push out the arc-shaped part of the upper half of the upper propeller 401; at the same time, due to the action of the propeller 4's own gravity, the upper propeller 401 is pushed up by the push rod 502, which squeezes the metal triangular head 802 of the locking device 8, overcoming the second spring 803 at the tail of the locking device 8 and squeezing it back into the mounting hole of the locking device 8. When the upper propeller 401 is completely pushed out, the metal triangular head 802 loses its squeezing force and automatically pops out under the action of the second spring 803, supporting the upper propeller 401 from retracting. This completes a complete working cycle, and the cycle repeats. This achieves fully automatic cleaning of the air intake filter 9 on one side of the cooler 1.

[0051] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. In other words, equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. An automatic cleaning device for the cooler of an oil-circulating air-cooled main transformer, characterized by: The invention comprises a cooler (1), a plurality of fans (2) are provided on one side of the cooler (1), a cleaning rack (3) is provided on the other side of the cooler (1), a sliding propeller (4) is provided on the cleaning rack (3), a dirt cleaning device (6) is provided at one end of the propeller (4), a plurality of buffer devices (5) are provided at the bottom of the cleaning rack (3), and a plurality of magnets (7) are provided at the top of the cleaning rack (3); The propeller (4) comprises an upper propeller (401) and a lower propeller (402), wherein locking devices (8) are provided at both ends of the lower propeller (402), and the upper propeller (401) slides against the lower propeller (402); The upper propeller (401) is a hollow structure. The top of the upper propeller (401) is an arc-shaped surface (4013). The upper propeller (401) is provided with a first through hole (4011). The guide rod (301) abuts against the first through hole (4011). Limiting plates (4012) are provided at both ends of the upper propeller (401). The lower propeller (402) is a hollow cabinet body. A second through hole (4021) is provided on the lower propeller (402). Third through holes (4022) are provided at both ends of the lower propeller (402). The guide rod (301) abuts against the second through hole (4021). Mounting grooves (4023) are provided at both ends of the lower propeller (402). The locking device (8) is installed on the mounting grooves (4023). The locking device (8) comprises an outer sliding sleeve (801), a second spring (803) is provided in the outer sliding sleeve (801), and a metal triangular head (802) is provided at one end of the second spring (803); When the bottom of the upper propeller (401) is extended to a position higher than the height of the locking device (8), the metal triangular head (802) pops out under the action of the second spring (803), and the propeller (4) opens; When the locking device (8) is lifted to the height of the magnet (7), the metal triangular head (802) retracts under the action of the magnet (7), and the upper thruster (401) retracts under the action of gravity; The cleaning device (6) comprises a plurality of brushes (601), a rolling bearing (602) is provided between two brushes (601), a slightly sticky silicone tube (603) is wound around the rolling bearing (602), and bearing seats (604) are provided at both ends of the rolling bearing (602); The buffer device (5) comprises a housing (501), a piston (503) is provided in the housing (501), a push rod (502) is provided at one end of the piston (503), and a first spring (504) is provided between the piston (503) and the housing (501); When the propeller (4) descends, the push rod (502) passes through the third through hole (4022) and rests against the inner wall of the arc surface (4013).

2. The automatic cleaning device for the cooler of an oil-circulating air-cooled main transformer according to claim 1, characterized in that: An oil inlet pipe (101) is provided at the top of the cooler (1), an oil outlet pipe (102) is provided at the bottom of the cooler (1), an air inlet filter (9) is provided in the air inlet direction of the cooler (1), and a plurality of fans (2) are provided in the air outlet direction of the cooler (1).

3. The automatic cleaning device for the cooler of an oil-circulating air-cooled main transformer according to claim 1 is characterized by: A guide rod (301) is provided on the cleaning rack (3), flat bottom grooves (303) are provided on both sides of the cleaning rack (3), an internal thread (304) is provided on the flat bottom groove (303), a nut (302) is provided on one side of the flat bottom groove (303), the magnet (7) abuts against the flat bottom groove (303), and the internal thread (304) is threadedly connected to the nut (302).

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