Transformer with rain shielding function
By installing rainwater detection modules and automatic shielding systems on transformers, the problems of reduced insulation performance and safety hazards in rainy environments have been solved, achieving effective protection and normal operation in rainy environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GREAT WALL ELECTRIC GRP SHANGHAI CO LTD
- Filing Date
- 2025-03-17
- Publication Date
- 2026-05-29
AI Technical Summary
When existing transformers are used in areas with heavy rainfall, they are prone to insulation degradation, equipment damage, and safety hazards due to rainwater intrusion. Existing protective measures are costly and require passive management.
Design a transformer with rain protection function. The rain detection module automatically opens the cover to waterproof when it rains and automatically opens it again after the rain stops to ensure heat dissipation. The cover switching is achieved by a motor reduction mechanism and an electric push rod.
It effectively prevents rainwater intrusion, reduces the risk of transformer failure, lowers management costs, ensures normal operation and heat dissipation of the transformer, and improves safety.
Smart Images
Figure CN224304471U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of transformer equipment technology, and in particular to a transformer with rain protection 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 a primary coil, a secondary coil, and an iron core (magnetic core). 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, fully sealed 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 transformers / test transformers, angle transformers, high-current transformers, excitation transformers, etc. Transformers are fundamental equipment for power transmission and distribution, and are widely used in industry, agriculture, transportation, urban communities, and other fields.
[0003] Although existing transformers meet the power supply needs to a certain extent, due to structural limitations, there is no suitable rainproof equipment. When used in areas with a lot of rain for a long time, the following technical problems will occur: (1) Decreased insulation performance: After rainwater enters the transformer, it will cause the insulation resistance of the winding to decrease, increasing the risk of breakdown. In severe cases, it may even burn out the transformer and cause an electrical fire; (2) Equipment damage: Rainwater entering the transformer may cause problems such as winding short circuit and inter-turn short circuit, which will damage the equipment; (3) Safety hazards: Transformers in humid environments are prone to sparking, especially on rainy days. Power facilities exposed outdoors, such as high-voltage lines, transformers, and substations, are prone to short circuits and sparking due to rainwater erosion, increasing the risk of fire. Existing technologies typically reduce the impact of rainwater on transformers by strengthening inspections and checks (regularly checking the transformer's sealing condition to ensure good sealing in all parts and promptly replacing aging and damaged seals), using water-sensing indicator paste (applying water-sensing indicator paste inside the transformer oil tank to detect moisture ingress in a timely manner), and drying treatment (for transformers that have already become damp, offline or online drying methods can be used to restore their insulation performance). These are passive management methods and increase management costs. Therefore, it is particularly necessary to provide a transformer that can actively prevent rainwater ingress and ensure effective ventilation and heat dissipation. Utility Model Content
[0004] To overcome the shortcomings of existing transformers due to structural limitations, as described in the background, this utility model provides a transformer with a rain-proof function. In application, under the combined action of relevant mechanisms, the transformer body can actively waterproof itself through a cover during rain, reducing the impact of rainwater on the transformer body. Furthermore, the cover can be opened when the rain stops, ensuring normal heat dissipation of the transformer body under normal conditions.
[0005] The technical solution adopted by this utility model to solve its technical problem is:
[0006] A transformer with rain protection function includes a transformer body, a rain cover, a rain detection module, a motor reduction mechanism, and an electric push rod, as well as a control circuit and a limit circuit. Limit posts are installed around the upper perimeter of the transformer body's casing. The lower end of the rain cover is rotatably mounted on the upper end of one of the rear limit posts, while the other end of the lower end of the rain cover is mounted to the power output shaft of the motor reduction mechanism. The motor reduction mechanism is mounted on the other rear limit post. A support frame is installed on the rear side of the transformer body's mounting bracket. The upper end of the electric push rod is mounted on the front of the upper end of the support frame, and a baffle is installed on the rear side of the upper end of the support frame. An insulating plate is installed on the upper end of the motor reduction mechanism's casing, and the detection head of the rain detection module is mounted on the insulating plate. The rain detection module, control circuit, and limit circuit are installed inside an electrical control box. The signal output terminal of the rain detection module is electrically connected to the signal input terminals of the control circuit and limit circuit. The power output terminal of the control circuit is electrically connected to the power input terminal of the motor reduction mechanism, and the power output terminal of the limit circuit is electrically connected to the power input terminal of the electric push rod.
[0007] Furthermore, the distance between the front end of the baffle and the movable rod of the electric push rod is greater than the thickness of the shielding cover, and the length and width of the shielding cover are greater than the length and width of the upper end of the transformer body shell.
[0008] Furthermore, the control circuit includes a time relay module and a relay and a power switch that are electrically connected. The positive power input terminal of the time relay module is connected to the positive control power input terminal of the relay. The negative power input terminal and the negative control power input terminal of the time relay module are connected, as are the negative power input terminal and the negative control power input terminal of the relay. One normally open contact terminal and one normally closed contact terminal of the relay are respectively connected to one end of each of the two power switches. The power output terminal of the time relay module is connected to the positive power input terminal of the relay.
[0009] Furthermore, the front end of the baffle and the upper end of one of the limiting posts are respectively provided with mounting grooves, and the two power switches are respectively installed in the two openings.
[0010] Furthermore, the limiting circuit includes a time-controlled switch and a relay, and a time relay module, all electrically connected. The positive power input terminal of the time relay module is connected to the control power input terminal of the first relay and the positive control power input terminal of the second relay. The positive power input terminal of the time-controlled switch is connected to the positive power input terminal of the first relay. The normally closed contact terminal of the first relay is connected to the positive control signal input terminal of the time relay module. The power output terminal of the time relay module is connected to the positive power input terminal of the second relay. The negative power input terminal of the time-controlled switch is connected to the negative power input terminal and negative control power input terminal of the time relay module, the negative power input terminal of the first relay, and the negative power input terminal and negative control power input terminal of the second relay.
[0011] Compared with existing technologies, the advantages of this invention are as follows: Based on a transformer body, in application, the rain detection module outputs a control signal to the control circuit after detecting rain. The control circuit, through a related mechanism, causes the shielding cover to switch from a vertical to a horizontal position. This protects the transformer body from rain during rain. After the rain stops, the limit circuit, through a related mechanism, causes the shielding cover to switch from a horizontal to a vertical position, ensuring normal heat dissipation of the transformer body under normal conditions. This invention maximizes the normal operation of the transformer body and reduces the probability of transformer failure, thus having good application prospects. Attached Figure Description
[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0014] Figure 2 This is a partial structural diagram of the present invention.
[0015] Figure 3 This is the circuit diagram of this utility model. Detailed Implementation
[0016] Figure 1 , 2As shown in Figure 3, a transformer with rain protection function includes a transformer body 1, a power module U1, a rain cover 2, a rain detection module U2, a motor reduction mechanism M, and an electric push rod M1. It also includes a control circuit 3 and a limit circuit 4. A limit post 101 is fixedly installed on both the upper front and rear outer sides of the transformer body 1. A shaft 21 is welded to the lower ends of both sides of the rain cover 2. A bearing seat 22 is fixedly installed on the upper end of the left rear limit post. The motor reduction mechanism M is fixedly installed on the right rear limit post 101. The left shaft 21 of the rain cover is fixedly installed inside the bearing inner ring of the bearing seat 22. The right shaft 21 of the rain cover and the power output shaft of the motor reduction mechanism M are connected. The left end is fixedly installed together; a "Π"-shaped support frame 102 is fixedly installed on the left and right sides of the rear end of the mounting frame of the transformer body; the upper end of the cylinder of the electric push rod M1 is vertically distributed and fixedly installed on the front middle part of the upper end of the support frame 102; a baffle 103 with a height lower than the lower part of the movable column of the electric push rod is welded to the rear side of the upper end of the support frame 102; an insulating plate 5 is horizontally fixedly installed on the upper end of the outer shell of the motor reduction mechanism M; the split-type detector head T of the rainwater detection module is horizontally fixedly installed on the insulating plate 5 and the lower metal part of the detector head T contacts the upper end of the insulating plate 5; the power module U1, the rainwater detection module U2, the control circuit 3, and the limit circuit 4 are installed in the electrical control box 6 of the transformer body.
[0017] Figure 1 , 2As shown in Figure 3, the distance between the front end of the baffle 103 and the piston rod of the electric push rod M1 is 2 mm greater than the thickness of the cover 2, and the length and width of the cover 2 are 16 cm greater than the upper length and width of the transformer body 1. When the lower front end of the cover 2 contacts the front limiting post 101 of the transformer body, the cover 2 is in a front-high-rear-low structure (which facilitates the rearward discharge of rainwater). When the cover 2 is in a vertical structure, the upper rear side of the cover 2 contacts the front end of the baffle 103. The control circuit includes a time relay module U3 and a relay J1 connected via circuit board wiring, and jog push-button type normally closed contact micro power switches S1 and S2. The positive power input terminal 1 of the time relay module U3 is connected to the positive control power input terminal of the relay J1. The negative power input terminal 2 and the negative control power input terminal 4 of the time relay module U3 are connected to the negative power input terminal and the negative control power input terminal of the relay J1. One normally open contact terminal and one normally closed contact terminal of the relay J1 are connected to one end of the two power switches S1 and S2 respectively. The positive power input terminal of the relay J1 is connected to the power output terminal 5 of the time relay module U3. The front left end of the baffle 103 and the upper end of the front left limit post of the transformer body 1 have a recessed mounting groove and a recessed mounting groove, respectively. The two power switches S2 and S1 are fixedly installed in the two openings. The power switch S2 button at the position of the baffle 102 faces forward, and the power switch S1 button at the position of the limit post faces upward. When the cover 2 is in a vertical structure, its rear end contacts the power switch S2 button at the position of the baffle, and the internal contact of the power switch S2 is open. When the front end of the cover 2 contacts the front limit post 101 of the transformer body, the lower end of the cover 2 contacts the power switch S1 button at the position of the limit post, and the internal contact of the power switch S1 is open. The limit circuit includes a time control switch U4 and relays J2 and J3, and a time relay module U5 connected via circuit board wiring. The positive power input terminal 1 of the time relay module U5 is connected to the control power input terminal of the first relay J2 and the positive control power input terminal of the second relay J3. The positive power input terminal 1 of the time control switch U4 is connected to the positive power input terminal of the first relay J2. The normally closed contact terminal of the first relay J2 is connected to the positive control signal input terminal 3 of the time relay module U5. The power output terminal 5 of the time relay module U5 is connected to the positive power input terminal of the second relay J3. The negative power input terminal 2 of the time control switch U4 is connected to the negative power input terminal 2 and the negative control power input terminal 4 of the time relay module U5, as well as the negative power input terminals of the first relay J2, the second relay J3, and the negative control power input terminal.
[0018] Figure 1 , 2As shown in Figure 3, the power input terminals 1 and 2 of the power module U1 are connected to the two poles of the 220V AC power supply via wires. The power output terminals 3 and 4 of the power module U1 are connected to the power input terminals 1 and 2 of the rain detection module U2, the positive and negative control power input terminals of the relay J1 in the control circuit, and the positive and negative control power input terminals of the limit circuit J3 via wires. The signal output terminal 3 of the rain detection module U2 is connected to the signal input terminal of the control circuit, the 3rd pin of the time relay module U3, the signal input terminal of the limit circuit, and the positive power input terminal 1 of the time control switch U4 via wires. The other end of the power switch S1 and the other normally open contact of the relay J1, the other end of the power switch S2 and the other normally closed contact of the relay J1, and the positive and negative power input terminals of the motor reduction mechanism M are connected via wires. The power output terminals of the limit circuit, pins 3 and 4 of the time control switch U4, the two normally open contacts of the relay J3, and the positive and negative and negative positive power input terminals of the electric push rod M11 are connected by wires.
[0019] Figure 1 , 2As shown in Figure 3, this new invention is based on the transformer body 1 and utilizes the principle of electromagnetic induction to change the AC voltage. For example, it converts the input high-voltage AC power supply into 380V AC power supply to power the electrical load. Transformers are a mature existing technology, so this application will not elaborate on the working principle of transformers. After the AC 220V power supply enters the power input terminal of the power module U1, pins 3 and 4 of the power module U1 output a stable DC 12V power supply, which enters the power input terminals of the rain detection module U2, the control circuit, and the limit circuit, and the above modules and circuits are powered on and work. When there is no rain, pin 3 of the rain detection module U2 does not output a high-level signal to the signal input terminals of the time relay module U3, etc. The electric push rod M1 and the motor reduction mechanism M are not powered on and work, and the shield 2 is in a vertical state. When it rains, the rainwater will come into contact with the two metal plates of the split-type detector head T of the rain detection module U2. Therefore, pin 3 of the rain detection module U2 outputs a high-level signal, which enters pin 3 of the time relay module U3 and pin 1 of the time control switch U4. After the time control switch U4 is powered on, its pins 3 and 4 output power for 4 seconds to the positive and negative power input terminals of the electric push rod M1. After the electric push rod M1 is powered on, its movable column moves up a certain distance and stops moving. In this way, the lower end of the movable column is higher than the upper end of the cover 2, and the cover 2 can then move forward and downward. After a high level is input to pin 3 of the time relay module U3, pin 5 will output power for 15 seconds every 4 seconds, which will then enter the positive power input terminal of relay J1. Relay J1 will be energized and its control power input terminal and normally open contact terminal will close. As a result, the positive and negative power input terminals of the motor reduction mechanism M will be energized, and the power output shaft of the motor reduction mechanism M will drive the cover 2 to move forward and downward along the bearing seat 22 via the shaft 21. When the front end of the cover 2 contacts the front limit post 101 of the transformer body, the power switch S1 button at the position of the lower end of the cover 2 contacts the limit post, and the internal contacts of the power switch S1 will open. The motor reduction mechanism M will lose power and stop working. At this moment, after the lower front end of the cover 2 contacts the front limit post 101 of the transformer body, the cover 2 will be in a front-high and rear-low structure, which is conducive to the rearward discharge of rainwater. Through the above, this new invention can, when it rains on site, have the electric push rod move upward without limiting the movement of the movable cover, and the motor reduction mechanism drive the cover to move forward and downward to the stop point to completely cover the upper end of the transformer body 1, reducing the probability of rainwater falling directly onto the shell of the transformer body 1 and affecting the operation of the transformer body 1.
[0020] Figure 1 , 2As shown in Figure 3, when the operation stops, no rainwater comes into contact with the two metal plates of the split-type detector head T of the rainwater detection module U2. Therefore, pin 3 of the rainwater detection module U2 stops outputting a high-level signal to pin 3 of the time relay module U3 and pin 1 of the power input terminal of the time control switch U4. After pin 3 of the time relay module U3 stops inputting a high-level signal, its pin 5 stops outputting power to the positive power input terminal of relay J1. Relay J1 is de-energized and no longer engages; its control power input terminal and normally closed contact terminal close. Thus, the positive and negative power input terminals of the motor reduction mechanism M are energized, and the power output shaft of the motor reduction mechanism M drives the shield 2 to move backward and upward along the bearing seat 22 via the shaft 21. When the shield 2 is in a vertical position, its rear end contacts the power switch S2 button at the baffle position, and the internal contacts of the power switch S2 are open. The motor reduction mechanism M is de-energized and no longer works. At this moment, the shield 2 is in a vertical state. Since the shield 2 no longer covers the upper part of the transformer body 1's shell, it ensures that the transformer body can dissipate heat normally. In practice, when pin 3 of the rain detection module U2 outputs a high level, relay J2 will be energized and its control power input terminal and normally closed contact terminal will be open. At this time, pin 3 of the time relay module U5 will not input a high level, so relay J3 will not be energized and the negative and positive power input terminals of the electric push rod M1 will not be energized. When the rain stops, relay J2 will be de-energized and its control power input terminal and normally closed contact terminal will close. Then, pin 3 of the time relay module W5 will input a high level signal. Subsequently, pin 5 of the time relay module W5 will output a high level for 4 seconds to the positive power input terminal of relay J3. Relay J3 will be energized and its control power input terminal and normally open contact terminal will close. The negative and positive power input terminals of the electric push rod M1 will be energized. After the electric push rod M1 is energized, its movable column will move down a certain distance and stop moving. The lower end of the movable column is lower than the upper end of the cover 2. The movable column limits the cover 2 to prevent the cover 2 from swaying forward or backward due to strong winds. Figure 3In this circuit, power module U1 is a finished product of AC 220V to DC 12V power module; relays J1, J2, and J3 are DC 12V; time switch U4 is a finished product of time controller model KG316T, which has two power input terminals, two power output terminals, and seven setting buttons. By adjusting the seven setting buttons, the output time of the two power output terminals can be set; electric push rod M1 is a finished product of reciprocating electric telescopic rod with a power of 20W; motor reduction mechanism M is a finished product of coaxial motor gear reducer with a power of 500W. The time relay modules U3 and U5 are finished products of model JK-DE time relay modules. They have two power input terminals, one normally open power output terminal, two control signal input terminals, and four setting buttons. By operating the four setting buttons, the power output time of the two power output terminals can be set. The rain detection module U2 is a finished product of model BFS-12V split rain sensor. It has two power input terminals, one signal output terminal, and one split detection head. When the detection head detects rain, the signal output terminal outputs power; otherwise, it does not output power.
[0021] 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.
[0022] 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 with rain protection function, comprising a transformer body, a rain protection cover, a rain detection module, a motor reduction mechanism, and an electric push rod, characterized in that, It also includes a control circuit and a limit circuit; limit posts are installed around the upper part of the transformer body shell, and the lower end of the shield is rotatably mounted on the upper end of the limit post on the rear side. The other side of the lower end of the shield is installed together with the power output shaft of the motor reduction mechanism, and the motor reduction mechanism is installed on the other limit post on the rear side; a support frame is installed on the rear side of the transformer body mounting bracket, the upper end of the electric push rod is installed on the front of the upper end of the support frame, and a baffle is installed on the rear side of the upper end of the support frame; an insulating plate is installed on the upper end of the outer shell of the motor reduction mechanism, and the probe of the rainwater detection module is installed on the insulating plate; the rainwater detection module, control circuit, and limit circuit are installed in the electrical control box; the signal output terminal of the rainwater detection module is electrically connected to the signal input terminal of the control circuit and the limit circuit; the power output terminal of the control circuit is electrically connected to the power input terminal of the motor reduction mechanism, and the power output terminal of the limit circuit is electrically connected to the power input terminal of the electric push rod.
2. The transformer with rain protection function according to claim 1, characterized in that, The distance between the front end of the baffle and the movable rod of the electric push rod is greater than the thickness of the shielding cover, and the length and width of the shielding cover are greater than the length and width of the upper end of the transformer body shell.
3. The transformer with rain protection function according to claim 1, characterized in that, The control circuit includes a time relay module and a relay, and power switches that are electrically connected. The positive power input terminal of the time relay module is connected to the positive control power input terminal of the relay. The negative power input terminal of the time relay module and the negative control power input terminal, and the negative power input terminal of the relay and the negative control power input terminal are connected. One normally open contact terminal and one normally closed contact terminal of the relay are respectively connected to one end of each of the two power switches. The power output terminal of the time relay module is connected to the positive power input terminal of the relay.
4. The transformer with rain protection function according to claim 3, characterized in that, There are mounting slots at the front end of the baffle and at the top of one of the limiting posts, and two power switches are installed in the two openings respectively.
5. The transformer with rain protection function according to claim 1, characterized in that, The limit circuit includes a time-controlled switch and a relay connected by electrical wires, and a time relay module. The positive power input terminal of the time relay module is connected to the control power input terminal of the first relay and the positive control power input terminal of the second relay. The positive power input terminal of the time-controlled switch is connected to the positive power input terminal of the first relay. The normally closed contact terminal of the first relay is connected to the positive control signal input terminal of the time relay module. The power output terminal of the time relay module is connected to the positive power input terminal of the second relay. The negative power input terminal of the time-controlled switch is connected to the negative power input terminal and negative control power input terminal of the time relay module, the negative power input terminal of the first relay, the negative power input terminal of the second relay, and the negative control power input terminal.