An AC / DC maintenance and testing power supply box

Abstract

This utility model relates to the field of power supply box technology, specifically an AC / DC maintenance and testing power supply box, including a box body, a battery inside the box body, an input circuit board, an AC output circuit board, and a DC output circuit board on the top of the battery, a box cover on the top of the box body, a main control board detachably connected to the bottom of the box cover, a DC control output port fixed on the top of the box body, a DC voltage output hole fixed on the right end of the DC control output port, a DC voltage adjustment knob on the right end of the DC voltage output hole, a charging port fixed on the top of the box cover, and leakage protection on the left end of the DC control output port. This utility model, by using this power supply box, can effectively shorten power extraction time, thereby shortening the test power outage time, reducing the risk of complaints due to power outages, and improving customer power satisfaction. This power supply box simplifies the power extraction process of traditional cable rollers and reduces operational complexity.

Description

Technical Field

[0001] This utility model belongs to the field of power supply box technology, specifically an AC / DC maintenance and testing power supply box. Background Technology

[0002] With the rapid advancement of power grid construction, regional power grids will undergo systemic upgrades, which directly leads to a geometric increase in the workload of professional operations such as power grid equipment installation and commissioning, and relay protection systems. This poses a huge challenge to the efficiency of maintenance and testing. Therefore, it is necessary to develop a convenient maintenance and testing power supply to shorten the time for temporary power supply connection of maintenance and testing equipment, thereby reducing the overall time spent on maintenance and testing work.

[0003] However, in existing systems, the temporary power supply for testing equipment in substations, community distribution rooms, and other outdoor electrical equipment is typically achieved by connecting a cable roller to the maintenance power supply box or generator, energizing the cable roller reel, and then plugging the testing equipment into the cable roller reel to energize the equipment. This method of connecting the testing equipment to the temporary power supply takes a relatively long time and cannot meet the needs of the power supply company's substation operation and maintenance team. Therefore, this utility model designs an AC / DC maintenance and testing power supply box to solve the above problems. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides an AC / DC maintenance and testing power supply box, which effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an AC / DC maintenance and testing power supply box, comprising a box body, a battery inside the box body, a positioning strip on the top of the battery, an input circuit board detachably connected to the top of the positioning strip, an AC output circuit board on the right end of the input circuit board, a DC output circuit board on the right end of the AC output circuit board, a sealing groove fixed on the top of the box body, a box cover tightly fitted to the outside of the sealing groove, a main control board detachably connected to the bottom of the box cover, a DC control output port fixed on the top of the box body, a DC voltage output hole fixed on the right end of the DC control output port, a protective sleeve detachably connected to the top of the DC control output port and the DC voltage output hole, a DC voltage regulating knob on the right end of the DC voltage regulating knob, a DC switch on the right end of the DC switch, a main switch on the front end of the DC switch, a charging port fixed on the top of the box cover, a leakage current protector on the left end of the DC control output port, a 220V AC output hole on the front end of the leakage current protector, and a grounding wire connection port fixed on the top of the box body.

[0006] Preferably, the cover and the sealing groove are fastened together by a number of sealing bolts. Two sets of positioning plates are fastened to the top of the cover. Each set of positioning plates has a handle fixed to its top. A DC display screen is detachably connected to the top of the enclosure. An AC display screen is detachably connected to the top of the enclosure. An energy storage output button is also fixed to the top of the enclosure. A trip output button is fixed to the right end of the energy storage output button. A closing interlock button is fixed to the right end of the trip output button. A closing output button is fixed to the right end of the closing interlock button.

[0007] Preferably, the bottom of the cover is fixed with a plurality of locking strips, each locking strip being tightly fitted with the positioning strip at its bottom, the sealing groove is provided with a plurality of positioning grooves, each positioning groove being slidably connected to the positioning strip, and the AC output circuit board and the DC output circuit board being detachably connected to the positioning strip.

[0008] Preferably, the input circuit board integrates a relay and a closed-loop voltage transformer, the AC output circuit board integrates a single-phase T-type three-level inverter, and the DC output circuit board integrates a voltage-type bridge PWM rectifier.

[0009] Preferably, a battery support block is also fixed inside the housing, a shock-absorbing block is fixed inside the battery support block, and a battery positioning plate is fastened to the top of the battery support block by bolts, and the battery positioning plate is fixedly connected to the battery on its top.

[0010] Compared with the prior art, the beneficial effects of this utility model are: (1) By using the power supply box, this utility model can effectively shorten the power supply time, thereby shortening the test power outage time, reducing the risk of complaints caused by power outages, and improving customer satisfaction with electricity use. The power supply box simplifies the power supply process of traditional cable rollers, reduces the complexity of operation, and eliminates the safety risks of connecting cable rollers to live equipment such as cabinets and circuit breakers.

[0011] (2) The present invention can ensure the sealing of the entire power box through the box body, thereby ensuring the safety of the battery. At the same time, the sealing of the entire power box can be further ensured through the cooperation of the box cover and the sealing groove. Meanwhile, the device can ensure the safety of the DC control output port and the DC voltage output port through the protective sleeve, thereby preventing leakage of the DC control output port and the DC voltage output port. At the same time, the leakage protection device of the power box can ensure the safety of the input circuit board, the AC output circuit board and the DC output circuit board, thereby improving the service life of the entire power box.

[0012] (3) The present invention uses a positioning strip to support the input circuit board. The input circuit board can be directly connected to 220V AC voltage through the charging port. Through the closed transformer, it is converted to 12V DC voltage to power the motherboard, thereby charging the battery. The inverter input voltage of the AC output circuit board is ±12.5V DC voltage, with a power of 6500W. It outputs 220V AC voltage close to a sine wave, thus facilitating the output of AC voltage through the 220V AC output port. The rectifier input voltage of the DC output circuit board is 220V AC voltage, with a power of 6500W. It can output 0-±110V adjustable DC power, thus facilitating the output adjustment of DC voltage, thereby ensuring the accuracy of DC voltage output and improving the efficiency of DC voltage output, thereby ensuring the DC voltage output effect. Attached Figure Description

[0013] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0014] In the attached diagram: Figure 1 This is a schematic diagram of the overall design of this utility model; Figure 2 This is a top view of the entire utility model; Figure 3 This is a schematic cross-sectional view of the present invention; Figure 4 This is a schematic diagram of the interior of the housing of this utility model; Figure 5 This is a schematic diagram of the top of the positioning strip of this utility model; Figure 6 This is a schematic diagram of the battery of this utility model; Figure 7 This is a schematic diagram of the shock-absorbing block of this utility model.

[0015] In the diagram: 1-Box body; 2-DC display screen; 3-DC control output port; 4-Battery; 5-Positioning strip; 101-Box cover; 102-Sealing bolt; 103-Handle; 104-Positioning plate; 105-Charging port; 106-Grounding wire connection port; 107-AC display screen; 108-Sealing groove; 109-Locking strip; 110-Main control board; 111-Positioning groove; 201-Residual current device; 202-220V AC output port; 203 - Energy storage output button; 204 - Circuit breaker trip output button; 205 - Circuit breaker lockout button; 206 - Circuit breaker output button; 301 - DC voltage output port; 302 - Protective sleeve; 303 - DC voltage regulating knob; 304 - DC switch; 305 - Main switch; 401 - Battery positioning plate; 402 - Battery support block; 403 - Shock absorber block; 501 - Input circuit board; 502 - AC output circuit board; 503 - DC output circuit board. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0017] Example 1, by Figure 1 , Figure 3 , Figure 5The present invention includes a housing 1 made of alloy material and featuring an integral welded structure. The housing 1 ensures the airtightness of the entire power supply box, thereby guaranteeing the safety of the battery 4. The battery 4, a lithium iron phosphate battery, is housed inside the housing 1. The battery 4 provides the necessary power to the equipment requiring maintenance. A positioning strip 5, made of plastic material, is located on the top of the battery 4 and supports the input circuit board 501. The input circuit board 501 is detachably connected to the top of the positioning strip 5. The input circuit board 501 can be directly connected to 220V AC voltage via the charging port 105. Through a closed transformer, the AC voltage is converted to 12V DC to power the motherboard, thereby charging the battery 4. An AC output circuit board 502 is located on the right end of the input circuit board 501, and the inverter input voltage of the AC output circuit board 502 is ±12V.The enclosure has a 5V DC voltage and a power output of 6500W, producing a near-sinusoidal 220V AC voltage. A DC output circuit board 503 is located on the right end of the AC output circuit board 502. The rectifier input voltage of the DC output circuit board 503 is 220V AC, with a power output of 6500W, and it can output an adjustable DC power supply of 0-±110V. A sealing groove 108, made of alloy material, is fixed to the top of the enclosure 1. The sealing groove 108 supports the enclosure cover 101, and the enclosure cover 101 is tightly fitted to the outside of the sealing groove 108. The enclosure cover 101 is constructed using a... Made of gold material, the cover 101 ensures the airtightness of the enclosure 1. A main control board 110 is detachably connected to the bottom of the cover 101, controlling the entire power supply box. A DC control output port 3 is fixed to the top of the enclosure 1, facilitating the connection of DC control wires. A DC voltage output hole 301 is fixed to the right end of the DC control output port 3, facilitating the output of DC power. A protective sleeve 302 is detachably connected to the top of the DC control output port 3 and the DC voltage output hole 301. Made of rubber, the protective sleeve 302 ensures the sealing of the DC control output port 3 and the DC voltage output port 301, thereby guaranteeing their safety. A DC voltage adjustment knob 303 is located at the right end of the DC voltage output port 301 for convenient adjustment of the DC output voltage. A DC switch 304 is located at the right end of the DC voltage adjustment knob 303, used to control the DC voltage. A master switch 305 is located at the front end of the DC switch 304, used for... The power supply box controls the power on and off. A charging port 105 is fixed to the top of the box cover 101, facilitating charging of the entire power supply box. A leakage current protector 201 is located at the left end of the DC control output port 3. The leakage current protector 201 disconnects upon leakage, thus protecting the circuit. A 220V AC output port 202 is located at the front end of the leakage current protector 201, facilitating the output of 220V AC voltage. A grounding wire connection port 106 is also fixed to the top of the box body 1, facilitating grounding and ensuring the safety of the entire power supply box.

[0018] Example 2, based on Example 1, combined with... Figure 2 , Figure 4 , Figures 6-7The cover 101 and the sealing groove 108 are fastened together by several sealing bolts 102. Two sets of positioning plates 104, made of alloy material, are fastened to the top of the cover 101. These positioning plates 104 support the handle 103. Each set of positioning plates 104 has a handle 103 fixed to its top. These handles 103 are also made of alloy material, facilitating movement of the entire power supply box by the operator. A DC display screen 2 is detachably connected to the top of the box 1, displaying DC voltage values. An AC display screen 107 is detachably connected to the top of the box 1, displaying AC voltage values. The top of the box 1 also... A fixed energy storage output button 203 is provided. Pressing the energy storage output button 203 controls the output of internal electrical energy from the battery 4. A trip output button 204 is fixed to the right end of the energy storage output button 203. Pressing the trip output button 204 triggers the circuit breaker to trip, cutting off the faulty circuit. A closing interlock button 205 is fixed to the right end of the trip output button 204. Pressing the closing interlock button 205 restores the circuit connection. A closing output button 206 is fixed to the right end of the closing interlock button 205. The closing output button 206 is used to connect the circuit, facilitating the output of closing control signals. Several locking strips 109, made of alloy material, are fixed to the bottom of the cover 101. Locking strips 109 are used to position the positioning strips 5. Each locking strip 109 is tightly fitted to the positioning strip 5 at its bottom. The sealing groove 108 has several positioning grooves 111, which are used to position the positioning strips 5, thereby ensuring the safety of the input circuit board 501, the AC output circuit board 502, and the DC output circuit board 503. Each positioning groove 111 is slidably connected to the positioning strip 5. The AC output circuit board 502 and the DC output circuit board 503 are detachably connected to the positioning strips 5. The input circuit board 501 integrates a relay and a closed-type voltage transformer. The AC output circuit board 502 integrates a single-phase T-type three-level inverter. A voltage-type bridge PWM rectifier is integrated on the current output circuit board 503. A battery support block 402 is also fixed inside the housing 1. The battery support block 402 is made of alloy material and is used to support the battery positioning plate 401. A shock-absorbing block 403 is fixed inside the battery support block 402. The shock-absorbing block 403 is made of rubber material and can ensure the stability of the battery 4. The battery positioning plate 401 is fastened to the top of the battery support block 402 by bolts. The battery positioning plate 401 is made of alloy material and is used to support the battery 4. The battery positioning plate 401 is fixedly connected to the battery 4 on its top. Before using this power supply box, the operator secures the battery 4 to the battery support block 402 using bolts and the battery positioning plate 401. At this time, the shock-absorbing block 403 dampens the battery 4, ensuring its safety. The operator then secures the input circuit board 501, the AC output circuit board 502, and the DC output circuit board 503 to the positioning strip 5, and then engages the positioning strip 5 with the positioning groove 111. The operator then inserts the positioning groove 111 into the outside of the sealing groove 108. At this time, the locking strip 109 abuts against the positioning strip 5, ensuring its safety. The operator then proceeds to... The sealing bolt 102 secures the power supply box to the housing 1, ensuring its airtightness. When using the power supply box, the operator can charge the battery 4 through the charging port 105. The operator can easily move the entire power supply box using the handle 103. When the power supply box is moved to the desired position, the operator grounds the entire power supply box through the grounding wire connection port 106, ensuring its safety. Furthermore, the operator can turn on the main switch 305 to operate the power supply box. At this time, the operator can lift the leakage current protector 201 and press the energy storage output button 203, allowing the battery 4 to supply power to external devices. When the equipment requiring maintenance needs AC power, the operator plugs the connector into the 220V AC output port 202. If it is a plug-in connector, the operator opens the protective sleeve 302 on the DC control output port 3 and then inserts the DC control wire into the DC control output port 3. At this time, the operator presses the closing interlock button 205, thereby activating the AC output circuit board 502 and the DC output circuit board 503. Further, the operator presses the closing output button 206. At this time, due to the action of the AC output circuit board 502, a 220V AC voltage close to a sine wave can be output. The operator can then observe the AC voltage value through the AC display screen 107, thereby controlling the AC output power output via the 220V AC output port 202. The 0V AC output port 202 and the DC control output port 3 output power. If a short circuit occurs, the leakage current protector 201 trips, disconnecting the circuit. Pressing the trip output button 204 further disconnects the circuit, allowing the operator to inspect the short circuit point. After inspection, pressing the closing interlock button 205 reconnects the circuit. Pressing the closing output button 206 again restarts the circuit. To provide power to DC equipment, the operator turns on the DC switch 304. The DC voltage can be observed on the DC display screen 2. The operator adjusts the DC output voltage using the DC voltage adjustment knob 303.The operator inserts a wire into the DC voltage output port 301 to facilitate the supply of DC power.

[0019] The working process of this utility model is as follows: Before using this power supply box, the operator secures the battery 4 to the battery support block 402 using bolts and the battery positioning plate 401. At this time, the shock-absorbing block 403 can absorb the shock of the battery 4, thereby ensuring the safety of the battery 4. Next, the operator secures the input circuit board 501, the AC output circuit board 502, and the DC output circuit board 503 to the positioning strip 5, and then snaps the positioning strip 5 into the positioning groove 111. The operator then inserts the positioning groove 111 into the outside of the sealing groove 108. At this time, the locking strip 109 abuts against the positioning strip 5, thereby ensuring the safety of the positioning strip 5. The operator secures the sealing bolts 102 to the housing 1 using several sealing bolts 102, ensuring the airtightness of the entire power supply box. When using the power supply box, the operator can charge the battery 4 through the charging port 105. The operator can easily move the entire power supply box using the handle 103. When the power supply box is moved to the desired position, the operator grounds the entire power supply box through the grounding wire connection port 106, ensuring the safety of the entire power supply box. Furthermore, the operator can turn on the main switch 305 to operate the entire power supply box. At this time, the operator can lift the leakage current protector 201 and press the energy storage output button 203, thereby making the battery 4 an external device. For backup power supply, if the equipment to be repaired requires AC power, the operator plugs the plug into the 220V AC output port 202. If it is a plug-in interface, the operator opens the protective cover 302 on the DC control output port 3 and then plugs the DC control wire into the DC control output port 3. At this time, the operator presses the closing interlock button 205, thereby activating the AC output circuit board 502 and the DC output circuit board 503. Further, the operator presses the closing output button 206. At this time, due to the action of the AC output circuit board 502, a 220V AC voltage with a near-sine wave can be output. The operator can then observe the AC voltage value through the AC display screen 107, thereby controlling the equipment's operation. The 220V AC output port 202 and the DC control output port 3 output power. If a short circuit occurs, the leakage current protector 201 trips, disconnecting the circuit. Pressing the trip output button 204 further disconnects the circuit, allowing the operator to inspect the short circuit point. After inspection, pressing the closing interlock button 205 reconnects the circuit. Pressing the closing output button 206 again restarts the circuit. To provide power to DC equipment, the operator turns on the DC switch 304. The DC voltage can be observed on the DC display screen 2. The operator adjusts the DC output voltage using the DC voltage adjustment knob 303.The operator inserts a wire into the DC voltage output port 301 to facilitate the supply of DC power.

[0020] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An AC / DC maintenance and testing power supply box, characterized in that: The enclosure includes a housing (1), inside which is a battery (4). A positioning strip (5) is located on the top of the battery (4). An input circuit board (501) is detachably connected to the top of the positioning strip (5). An AC output circuit board (502) is located on the right end of the input circuit board (501), and a DC output circuit board (503) is located on the right end of the AC output circuit board (502). A sealing groove (108) is fixed to the top of the housing (1), and a cover (101) is tightly fitted to the outside of the sealing groove (108). A main control board (110) is detachably connected to the bottom of the cover (101). A DC control output port (3) is fixed to the top of the housing (1), and a DC control output port (3) is fixed to the right end of the DC control output port (3). The DC voltage output port (301) is detachably connected to the top of the DC control output port (3) and the DC voltage output port (301). The right end of the DC voltage output port (301) is provided with a DC voltage adjustment knob (303). The right end of the DC voltage adjustment knob (303) is provided with a DC switch (304). The front end of the DC switch (304) is provided with a main switch (305). The top of the box cover (101) is also fixed with a charging port (105). The left end of the DC control output port (3) is provided with a leakage current protector (201). The front end of the leakage current protector (201) is provided with a 220V AC output port (202). The top of the box body (1) is also fixed with a grounding wire connection port (106).

2. The AC / DC maintenance and testing power supply box according to claim 1, characterized in that: The cover (101) and the sealing groove (108) are fastened together by several sealing bolts (102). Two sets of positioning plates (104) are fastened to the top of the cover (101). Each set of positioning plates (104) has a handle (103) fixed to the top. A DC display screen (2) is detachably connected to the top of the box (1). An AC display screen (107) is detachably connected to the top of the box (1). An energy storage output button (203) is also fixed to the top of the box (1). A trip output button (204) is fixed to the right end of the energy storage output button (203). A closing interlock button (205) is fixed to the right end of the trip output button (204). A closing output button (206) is fixed to the right end of the closing interlock button (205).

3. The AC / DC maintenance and testing power supply box according to claim 2, characterized in that: The bottom of the cover (101) is fixed with several locking strips (109), each locking strip (109) is tightly fitted with the positioning strip (5) at its bottom, the sealing groove (108) is provided with several positioning grooves (111), each positioning groove (111) is slidably connected with the positioning strip (5), and the AC output circuit board (502) and the DC output circuit board (503) are detachably connected with the positioning strip (5).

4. The AC / DC maintenance and testing power supply box according to claim 3, characterized in that: The input circuit board (501) integrates a relay and a closed-loop voltage transformer, the AC output circuit board (502) integrates a single-phase T-type three-level inverter, and the DC output circuit board (503) integrates a voltage-type bridge PWM rectifier.

5. The AC / DC maintenance and testing power supply box according to claim 4, characterized in that: The box (1) is also fixed with a battery support block (402), and a shock absorber block (403) is fixed inside the battery support block (402). A battery positioning plate (401) is fastened to the top of the battery support block (402) by bolts. The battery positioning plate (401) is fixedly connected to the battery (4) on its top.

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