Transformer device with transformer oil automatic filtering function

Abstract

A transformer device with an automatic transformer oil filtering function belongs to the technical field of transformers and comprises a transformer body, a time switch, an oil pump, a filtering mechanism and a blockage detection circuit. A liquid outlet pipe and a liquid inlet pipe are installed on a shell of the transformer body, and the oil pump is installed at the side end of the transformer body. The filtering mechanism comprises valves, a barrel, a filter screen barrel, a pressure sensor, a connecting plate and a movable pipe, the upper end of the second valve is connected with a liquid outlet pipe of the transformer body, and the liquid outlet end of the oil pump is connected with a liquid inlet pipe of the transformer body; and the time switch and the blockage detection circuit are arranged in the electric control box and are electrically connected. The oil pump can be controlled to pump out transformer oil in the shell of the transformer body at regular intervals, the transformer oil is filtered through the filtering mechanism, a manager can be prompted to dispose the transformer oil in time when impurities are relatively large after filtering, and after the filter screen cylinder is blocked, the filter screen cylinder can be conveniently taken down to be cleaned on the basis that the transformer body does not stop. And the normal work of the transformer body is ensured as far as possible.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, and in particular to a transformer device with automatic transformer oil filtration function. Background Technology

[0002] A transformer is a device that uses the principle of electromagnetic induction to change alternating current voltage. Its main components are the primary coil, secondary coil, iron core (magnetic core), and transformer oil. Its main functions include voltage transformation, current transformation, impedance transformation, isolation, and voltage stabilization (magnetic saturation transformer). Transformers can be classified according to their uses as follows: distribution transformers, power transformers, combined transformers, dry-type transformers, oil-immersed transformers, single-phase transformers, electric furnace transformers, rectifier transformers, reactors, anti-interference transformers, lightning protection transformers, box-type transformer test transformers, angle transformers, high-current transformers, and excitation transformers. Transformers are fundamental equipment for power transmission and distribution, widely used in power supply fields such as industry, agriculture, transportation, and urban communities. Transformer oil is the oil located inside the transformer casing, primarily serving functions such as insulation, heat dissipation, arc suppression, and protection (filling the gaps in the insulating material, reducing contact between oxygen and easily oxidized materials, and delaying the aging of the insulating material, thus providing protection).

[0003] While existing transformers meet power supply needs to some extent, they still have the following technical shortcomings due to structural limitations. Specifically, the transformer oil inside the transformer casing is affected by its own quality, excessive transformer load, and the quality of other internal components (for example, poor-quality transformer oil may cause internal sediment precipitation; poor-quality coil insulation may lead to insulation shedding, or other insulation materials may also be of poor quality and cause insulation shedding). The resulting sediment cannot be removed in a timely manner, which will more or less affect the operation of the transformer (the sediment will deteriorate the insulation and heat dissipation performance of the transformer oil, thereby increasing the probability of transformer failure). Utility Model Content

[0004] In order to overcome the shortcomings of existing transformers due to structural limitations, as described in the background, this utility model provides a transformer device with automatic transformer oil filtration function based on the transformer body. In application, it can actively filter transformer oil at regular intervals, and when there are relatively many impurities after filtration, it can promptly alert management personnel to take action, thereby ensuring the normal operation of the transformer body as much as possible.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A transformer device with automatic transformer oil filtration function includes a transformer body, a time control switch, an oil pump, and also a filtration mechanism and a blockage detection circuit. An outlet pipe and an inlet pipe are fixedly installed on the upper and lower sides of the transformer body, respectively. The oil pump is fixedly installed on the side of the transformer body. The filtration mechanism includes valves, a cylinder, a filter screen, a pressure sensor, a connecting plate, and a movable pipe. The filter screen is movably fitted inside the cylinder. There are at least two valves and two connecting plates. Flanges are fixedly installed on the upper and lower ends of the cylinder. A lower connecting pipe is fixedly installed on the lower side of the lower connecting plate. The lower end of the lower connecting pipe is fixedly connected to the upper end of the first valve. The lower end of the first valve is fixedly connected to the inlet end of the oil pump. The upper side of the lower connecting plate is fixedly connected to the lower end of the cylinder. The flange is fixedly connected, and an upper connecting pipe is installed on the upper side of the connecting plate. The lower side of the upper connecting plate is connected to the upper flange of the cylinder. The upper connecting pipe has internal threads, and the movable pipe has external threads. The lower end of the movable pipe is threaded to the upper connecting pipe. The upper end of the movable pipe is connected to the lower end of the second valve. The upper end of the second valve is fixedly connected to the upper end of the outlet pipe of the transformer body. The outlet end of the oil pump is fixedly connected to the inlet pipe of the transformer body. The lower side of the upper connecting pipe is fixedly connected to the inlet pipe of the pressure sensor. The time control switch and the blockage detection circuit are installed in the electrical control box. The power output terminal of the time control switch is electrically connected to the power input terminal of the oil pump, and the signal output terminal of the pressure sensor is electrically connected to the signal input terminal of the blockage detection circuit.

[0007] Furthermore, the outer diameter of the connecting plate is the same as the outer diameter of the flange.

[0008] Furthermore, a sealing ring is installed on the outside of the limiting ring of the filter cylinder, and the outside of the sealing ring is in sealing contact with the inside of the cylinder.

[0009] Furthermore, the side and lower surfaces of the filter cylinder are provided with a number of filter holes, and the outer diameter of the filter cylinder is smaller than the inner diameter of the cylinder body.

[0010] Furthermore, a nut is fixedly installed on the outside of the upper connecting pipe.

[0011] Furthermore, the blockage detection circuit includes an electrically connected resistor, a transistor, and a light-emitting diode. One end of the first resistor and one end of the second resistor are connected to the base of the transistor. The collector of the transistor is connected to the negative terminal of the light-emitting diode. The positive terminal of the light-emitting diode is connected to one end of the third resistor. The other end of the second resistor is connected to the emitter of the transistor.

[0012] Compared with existing technologies, the advantages of this invention are as follows: Based on the transformer body, in application, the time-controlled switch can control the oil pump to extract transformer oil from the transformer housing at regular intervals. The oil is then filtered by the filtration mechanism before being fed back into the housing. When there are relatively many impurities after filtration, the pressure sensor detects this and outputs a signal to the blockage detection circuit. The LED in the blockage detection circuit illuminates promptly, alerting management personnel to take action (and even after the filter screen becomes clogged, the filter screen can be easily removed for cleaning without shutting down the transformer), thus ensuring the transformer body can operate normally as much as possible. Based on the above, this invention has good application prospects. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

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

[0015] Figure 2 This is a partial structural schematic diagram of the present invention.

[0016] Figure 3 This is the circuit diagram of this utility model. Detailed Implementation

[0017] Figure 1 , 2As shown in Figure 3, a transformer device with automatic transformer oil filtration function includes a transformer body 1, a power module W1, a time control switch W2, an oil pump M, and also a filtration mechanism 2 and a blockage detection circuit 3. The upper left and lower right ends of the transformer body 1 are respectively welded with an outlet pipe 101 and an inlet pipe 102 that communicate with its interior. The lower end of the oil pump M is fixedly installed on the lower right outer side of the frame of the transformer body 1. The filtration mechanism includes a valve 21, a cylinder 22, a cylindrical stainless steel filter cylinder 23, a pressure sensor W, a connecting plate 24, and a movable pipe 25. The upper outer side of the filter cylinder 23 has a fixed limiting ring 231, and the upper inner end of the cylinder 22 is welded with a hollow support ring 221. The limiting ring 231 of the filter cylinder is tightly fitted around the upper outer side of the support ring 221. There are two valves 21 and two connecting plates 24. A flange 29 is welded to the upper and lower outer sides of the cylinder 22, and a lower flange 29 is welded to the lower side of the opening in the middle of the lower connecting plate 24. The lower connecting pipe 26 is threaded to the upper end of the first valve 21, and the lower end of the first valve 21 is connected to the inlet of the oil pump M via a pipe. The upper side of the lower circular connecting plate 24 is bolted to the lower flange 29 of the cylinder. An upper connecting pipe 27 is welded to the upper side of the opening in the middle of the circular upper connecting plate 24. The lower side of the upper connecting plate 24 is bolted to the upper flange 29 of the cylinder. The upper connecting pipe 27 has internal threads. The movable tube 25 has external threads. The lower end of the movable tube 25 is threaded to the upper end of the upper connecting tube 27. The upper end of the movable tube 25 is threaded to the lower end of the second valve 21. The upper end of the second valve 21 is connected to the outlet pipe 101 of the transformer body via a pipe. The outlet end of the oil pump M is connected to the inlet pipe 102 of the transformer body via a pipe. A branch pipe communicating with its interior is welded to the lower right side of the upper connecting tube. The branch pipe is connected to the inlet pipe of the pressure sensor W via a pipe joint. The power module W1, the time control switch W2, and the blockage detection circuit 3 are installed in the transformer body electrical control box 4.

[0018] Figure 1 , 2As shown in Figure 3, the outer diameter of the connecting plate 24 is the same as the outer diameter of the flange 29. A hollow, annular, oil-resistant sealing ring is tightly fitted around the limiting ring of the filter cylinder 23, with the outer side of the ring in close contact with the inner side of the cylinder 22. The upper end of the filter cylinder 23 is open, and the lower end is closed. Several filter holes are distributed on the side and lower surfaces of the filter cylinder 23. The outer diameter of the filter cylinder 23 is smaller than the inner diameter of the cylinder 22. A nut head 28 is welded to the outside of the upper connecting pipe, allowing workers to easily use a wrench to grip the nut head and rotate the upper connecting pipe. The blockage detection circuit includes resistors R1, R2, and R3 connected via circuit board wiring, transistor Q1, and light-emitting diode VL1. The light-emitting surface of LED VL1 is located at the front outer end of the electrical control box 4. One end of the first resistor R1 and one end of the second resistor R2 are connected to the base of transistor Q1. The collector of transistor Q1 is connected to the negative terminal of LED VL1. The positive terminal of LED VL1 is connected to one end of the third resistor R3. The other end of the second resistor R2 is connected to the emitter of transistor Q1.

[0019] Figure 1 , 2 As shown in Figure 3, the power input terminals 1 and 2 of the power module W1, the power input terminals 1 and 2 of the time switch W2, and the two poles of the 220V AC power supply are connected by wires. The power output terminal of the time switch W2 and the power input terminal of the oil pump M (1.2KW) are connected by wires. The power output terminals 3 and 4 of the power module W1, the power input terminals 1 and 2 of the pressure sensor W, the other end of the resistor R3 at the power input terminal of the blockage detection circuit, and the emitter of the transistor Q1 are connected by wires. The signal output terminal 3 of the pressure sensor W and the other end of the resistor R1 at the signal input terminal of the blockage detection circuit are connected by wires.

[0020] Figure 1 , 2As shown in Figure 3, this new invention is based on the transformer body 1. In application, it converts high-voltage AC power to low-voltage AC power to supply power to electrical equipment. The above are existing mature technologies, which will not be elaborated upon in this application, nor will it provide any protection for the technical solution of the transformer body itself. In this invention, after the time control switch W2 is energized, its pins 3 and 4 will cycle to the power input terminal of the oil pump M at regular intervals (for example, outputting power for 5 minutes every 24 hours). During the period when the oil pump M is energized, the transformer oil in the transformer body shell will be extracted and then input through the upper end of the filter cylinder 21. After being filtered by the filter screen cylinder 23, the transformer oil enters the inlet end of the oil pump M and then flows back into the transformer body shell. During the flow of the transformer oil in and out, internal impurities are intercepted by the filter screen cylinder 23, reducing the probability that impurities in the oil cannot be removed in time and will affect the operation of the transformer (sediment will cause the insulation and heat dissipation performance of the transformer oil to deteriorate, thereby increasing the probability of transformer failure). After the 220V AC power supply enters the power input terminal of the power module W1, the stable 12V DC power supply output from pins 3 and 4 of the power module W1 enters the power input terminal of the blockage detection circuit and the pressure sensor. When the amount of impurities after filtration is relatively small, that is, when the blockage in the filter cartridge is relatively small, the pressure inside the filter cartridge is relatively low. The pressure detected by the pressure sensor W is relatively low, and the voltage signal output from pin 3 of the pressure sensor W is relatively low. This voltage signal is divided by resistors R1 and R2 and is lower than the base voltage of transistor Q1. Transistor Q1 will not conduct, so the LED VL1 will not light up, indicating that there are still relatively few impurities in the filter cartridge and it does not need to be cleaned yet. When there are relatively many impurities after filtration, meaning there is a relatively large amount of blockage in the filter cartridge, the pressure inside the filter cartridge is relatively high (under the action of oil pump M, the pressure of the transformer oil entering the filter cartridge increases due to resistance). The pressure sensor W detects a relatively high pressure, and the voltage signal output from pin 3 of the pressure sensor W is relatively high. This voltage signal, after being divided by resistors R1 and R2, is higher than the base voltage of transistor Q1, exceeding its starting voltage. Transistor Q1 will then conduct, and its collector will output a low-level signal, which enters the negative power input terminal of LED VL1. Therefore, LED VL1 will be energized and light up (resistor R3 acts as a voltage reducer and current limiter), indicating that there are relatively many impurities in the filter cartridge and it needs cleaning, thus ensuring the normal operation of the transformer body as much as possible. In practical applications, the LED and resistor R3 can also be replaced by an audible alarm to alert relevant personnel when the filter cartridge's filtration performance deteriorates.

[0021] Figure 1 , 2As shown in Figure 3, when the staff observes the LED emitting light and realizes that the filter cylinder is clogged, they close both valves 21 (which are open during normal operation). Then, the staff removes the bolts connecting the upper and lower end connecting plates and flanges of the cylinder, and uses a wrench to hold the nut head 28 and rotate it clockwise. In this way, the upper connecting pipe will rotate along the external thread of the movable pipe 25 and rise in height. The distance between the connecting plate at the lower end of the upper connecting pipe and the flange at the upper end of the cylinder is reduced, so the staff can easily remove the filter mechanism to the right. After removing the filter mechanism, the staff used tools to push the filter cylinder 23 upwards from bottom to top. After cleaning the filter cylinder, it was reinstalled in its original position. Finally, the filter mechanism was reinstalled into the flange between the upper and lower connecting pipes. The nut head 28 was clamped with a wrench and turned counterclockwise. In this way, the upper connecting pipe would rotate along the external thread of the movable pipe 25 and lower in height. The connecting plate at the lower end of the upper connecting pipe would contact the flange at the upper end of the cylinder. Multiple bolts were used to seal the cylinder and the upper connecting plate, and the lower connecting plate and the flange at the upper and lower ends of the cylinder together. The equipment could then be put into normal operation again (through the above, the filter cylinder can be cleaned without shutting down the transformer body after it becomes clogged). Figure 3 In this setup, power module W1 is a finished product of AC 220V to DC 12V power module; time control switch W2 is a finished product of model KG316T time controller, which has two power input terminals, two power output terminals, and seven setting buttons. By operating the seven setting buttons, the interval time of power output from the two power output terminals can be set; resistors R1, R2, and R3 have resistance values ​​of 10K, 4.7K, and 1.8K respectively; LED VL1 is a red LED; transistor Q1 is model 9013 (NPN); pressure sensor W is a finished product of model BP8G-AxA pressure sensor, which has two power input terminals and one signal output terminal.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

[0023] Furthermore, it should be understood that although this specification describes the embodiments, the embodiments do not necessarily contain only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A transformer device with automatic filtering function of transformer oil, comprising a transformer body, a time control switch, an oil pump, characterized in that, The filter mechanism comprises a valve, a cylinder, a filter screen cylinder, a pressure sensor, a connecting plate, and a movable pipe, and the filter screen cylinder is movably sleeved in the cylinder.

2. The transformer device having a function of automatically filtering the transformer oil according to claim 1, wherein The outer diameter of the connecting plate is consistent with the outer diameter of the flange plate.

3. The transformer device having a function of automatically filtering a variable pressure oil according to claim 1, wherein A sealing rubber ring is mounted on the outer side of the limiting ring of the filter screen cylinder, and the outer side of the rubber ring is in sealing contact with the inner side of the cylinder.

4. The transformer device having a function of automatically filtering a variable pressure oil according to claim 1, wherein The side end and the lower end surface of the filter screen cylinder are distributed with a plurality of filter holes, and the outer diameter of the filter screen cylinder is smaller than the inner diameter of the cylinder.

5. The transformer device having a function of automatically filtering a variable pressure oil according to claim 1, wherein A nut is fixedly mounted on the outer side of the upper connecting pipe.

6. The transformer device having a function of automatically filtering a variable pressure oil according to claim 1, wherein The blockage detection circuit comprises electrically connected resistors, a triode, and a light-emitting diode, one end of a first resistor and one end of a second resistor are connected to the base of the triode, the collector of the triode is connected to the negative electrode of the light-emitting diode, the positive electrode of the light-emitting diode is connected to one end of a third resistor, and the other end of the second resistor is connected to the emitter of the triode.

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