Practical training workshop safety power supply device
By designing a safe power supply device with a current monitoring circuit board in the training workshop, the current overload and safety hazards caused by the plug-in board are solved, and the effect of automatically cutting off the power supply and improving the power supply safety is achieved.
Patent Information
- Application Number
- CN202422593540.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-27
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-10-27
AI Technical Summary
In the training workshop, when using the plug-in board to extend the power supply line, it is easy to cause current overload, causing safety hazards such as heating of the plug-in board line, aging of the insulation layer and short circuit.
Design a safety power supply device in the training workshop, including a triple-pin plug, a winding wheel and a current monitoring circuit board. The device can monitor the current in real time, remind the user and automatically cut off the power supply line when the maximum current carrying capacity is reached to prevent heating of the power supply line.
It effectively avoids the heating of the power supply line due to current overload, reduces safety risks, improves power supply safety, and provides flexible power supply line design to facilitate temporary power supply in large-area training workshops.
Smart Images
Figure CN222637840U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of safe power supply, in particular to a safe power supply device for a training workshop. Background Art
[0002] The training workshop is large in area, with many electrical equipments of high power. Most of the fixed training equipments in the training workshop have dedicated power supply lines. When some instruments and equipment need temporary power supply, since the location of the socket is far away from the electrical equipments, generally a power strip is used to extend the power supply line to realize power supply.
[0003] There are many types of power strips on the market. Different types of power strips have different powers, which are mainly determined by the wire diameter and material of the power strip circuit. For example, a copper wire with a wire diameter of 0.5mm has a current carrying capacity of 5A, and an aluminum wire with the same wire diameter has a current carrying capacity of 4A. For multi-hole power strips, if you do not pay attention to its power when using it, the total power or total current of the electrical equipment plugged in to the power strip will exceed its load, which will cause the power strip circuit to heat up. In the long run, it will cause the insulation layer to age rapidly, and short circuits and other problems will occur, posing a safety hazard.
[0004] Therefore, a safe power supply device that can monitor current is needed. When the current reaches its maximum current carrying capacity, it will remind the user and cut off the power supply to avoid continuous heating of the power supply line and potential safety hazards. Summary of the invention
[0005] In response to the problems in the prior art, the utility model provides a safe power supply device for a training workshop that can monitor current. When the relevant electrical equipment reaches its maximum current carrying capacity, the user is reminded and the power supply is cut off to avoid continuous heating of the power supply line and safety hazards. The power supply line is long, which is convenient for temporary power supply of relevant instruments and equipment in the training workshop.
[0006] The safe power supply device comprises: a three-pin plug, which can be connected to a neutral line (N), a live line (L), and a ground line (PE); a power line; a winding wheel, on which a relatively long power line can be wound, which is convenient for use in a training workshop, and when in use, the power line of corresponding length is released according to the wiring distance; the winding wheel can be rotatably installed on a bracket, and the bracket can increase the distance between the winding wheel and the ground, so as to prevent water stains in the training workshop from causing a short circuit to the internal circuit of the device, thereby improving the safety of use; a plurality of three-hole sockets and a plurality of two-hole sockets are installed on the end surface of one end of the winding wheel; a current monitoring circuit board is arranged inside one end of the winding wheel; the L end and the N end of the three-pin plug are connected through the current monitoring circuit board Then it is connected with multiple three-hole sockets and multiple two-hole sockets; the current monitoring circuit board monitors the sum of the currents output on each socket in real time. When the relevant electrical equipment reaches its maximum current carrying capacity, it reminds the user and cuts off the power supply; the current monitoring circuit board is provided with terminals P1, P2 and a current sensing switch U2; the L end of the three-pin plug is connected to the terminal P1 after passing through the monitoring hole on the current sensing switch U2, and the N end of the three-pin plug 1 is connected to the terminal P1 to realize the input and monitoring of 220V AC power supply; the L ends and N ends of multiple three-hole sockets and multiple two-hole sockets are connected to the terminal P2; the grounding ends of multiple three-hole sockets are connected to the PE end of the three-pin plug.
[0007] Preferably, in order to cut off the circuit after the current is overloaded, the current monitoring circuit board also includes an AC contactor KM1, a time relay KT1, a manual switch S1, an AC-DC module U1, a buzzer LS1, and a current sensing switch U2. The terminal P1 is connected to the input end of the manual switch S1, and the output end of the manual switch S1 is connected to the input end of the AC-DC module U1. The AC-DC module U1 converts 220V AC power into a 24V DC power supply; the contact of the contactor KM1 is connected in series between the manual switch S1 and the terminal P2, and one end of the coil of the contactor KM1 is connected to the AC-DC module The other end of the coil of contactor KM1 is connected to one end of the first group of contacts of time relay KT1, and the other end of the first group of contacts of time relay KT1 is connected to the 24V end of AC-DC module U1; the two ends of the second group of contacts of time relay KT1 are respectively connected to K1 and K2 ends of current sensing switch U2, one end of the coil of time relay KT1 is connected to K1 end of current sensing switch U2, and the other end of the coil of time relay KT1 is connected to the GND end of AC-DC module U1; K2 end of current sensing switch U2 is connected to the 24V end of AC-DC module U1.
[0008] Preferably, in order to realize the circuit alarm function, the current monitoring circuit board also includes a buzzer LS1, one end of the buzzer LS1 is connected in series with a resistor R2 and then connected to the K1 end of the current sensing switch U2, and the other end of the buzzer LS1 is connected to the GND end of the AC-DC module U1.
[0009] Preferably, the current monitoring circuit board also includes an indicator light LED1, one end of the indicator light LED1 is connected in series with a resistor R1 and then connected to the 24V end of the AC-DC module U1, and the other end is connected to the GND end of the AC-DC module U1, thereby realizing the power-on indication function of the current monitoring circuit board.
[0010] Preferably, the manual switch S1 and indicator light LED1 extend from holes on one end surface of the winding wheel for easy operation and observation; a sound outlet hole is provided on one end surface of the winding wheel for easy transmission of the alarm sound of the buzzer LS1.
[0011] Preferably, the bracket is rotatably connected to the winding wheel via a rotating shaft; the upper end of the bracket is bent to form a handle, which is convenient for taking and placing the device; two horizontal legs are provided at the lower end of the bracket, and insulating sleeves are sleeved on the legs. If the bracket is made of metal conductive material, the insulating sleeve can isolate the device from the ground, further ensuring the safety of power supply.
[0012] Compared with traditional power strips, the safe power supply device in the training workshop can monitor the current on the power supply line in real time. When the relevant electrical equipment reaches its maximum current carrying capacity, it will promptly issue an alarm to remind the user and cut off the power supply. If the staff does not respond within a certain period of time, the power supply will be automatically cut off to avoid safety hazards caused by continuous heating of the power supply line, thereby improving the safety of power supply. The power supply line is long and easy to retract and extend, which is convenient for temporary power supply to related instruments and equipment in training workshops with larger areas. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a three-dimensional structure diagram of a safety power supply device for a training workshop of the utility model. Figure 1 ;
[0014] Figure 2 This is a three-dimensional structure diagram of a safety power supply device for a training workshop of the utility model. Figure 2 ;
[0015] Figure 3 This is the internal wiring diagram of a safety power supply device for a practical training workshop of the utility model;
[0016] Figure 4 The utility model discloses a schematic diagram of an internal current monitoring circuit board of a safety power supply device for a training workshop. DETAILED DESCRIPTION
[0017] The following will be combined with the attached embodiment of the utility model Figure 1-4 ; Clearly and completely describe the technical solutions in the embodiments of the utility model:
[0018] like Figure 1-4As shown, in the first embodiment of the utility model, a safe power supply device for a training workshop includes: a three-pin plug 1, which can be connected to a neutral line (N), a live line (L), and a ground line (PE); a power line 2; a winding wheel 7, on which a longer power line 2 can be wound, which is convenient for use in a training workshop. When in use, the power line 2 of corresponding length is released according to the wiring distance; the winding wheel 7 is rotatably installed on a bracket 10, and the bracket 10 can increase the distance between the winding wheel 7 and the ground to prevent water stains in the training workshop from causing a short circuit to the internal circuit of the device, thereby improving the safety of use; a plurality of three-hole sockets 5 and a plurality of two-hole sockets 4 are installed on the end surface of one end of the winding wheel 7; a current monitoring circuit board 100 is arranged inside one end of the winding wheel 7; as shown Figure 3 As shown, the L end and the N end of the three-pin plug 1 are connected to a plurality of three-hole sockets 5 and a plurality of two-hole sockets 4 through a current monitoring circuit board 100; the current monitoring circuit board 100 monitors the sum of the currents output from each socket in real time, and when the relevant electrical equipment reaches its maximum current carrying capacity, it reminds the user and cuts off the power supply.
[0019] Specifically, Figure 3 As shown, the L end of the three-pin plug 1 passes through the monitoring hole on the current sensing switch U2 and is connected to the terminal P1, and the N end of the three-pin plug 1 is connected to the terminal P1 to realize the input of 220V AC power supply; the L ends and N ends of multiple three-hole sockets 5 and multiple two-hole sockets 4 are connected to the terminal P2; the grounding ends of the multiple three-hole sockets 5 are connected to the PE end of the three-pin plug 1.
[0020] In order to realize the function of automatically cutting off the power supply after the current is overloaded, such as Figure 4As shown, the current monitoring circuit board 100 includes a terminal P1, a terminal P2, an AC contactor KM1, a time relay KT1 (model H3Y-2-C), an indicator light LED1, a manual switch S1, an AC-DC module U1, a buzzer LS1, and a current sensing switch U2 (model M3060). The terminal P1 is connected to the input end of the manual switch S1, and the output end of the manual switch S1 is connected to the input end of the AC-DC module U1. The AC-DC module U1 converts 220V AC power into a 24V DC power supply; the contact (normally closed) of the contactor KM1 is connected in series between the manual switch S1 and the terminal P2, one end of the coil of the contactor KM1 is connected to the GND end of the AC-DC module U1, and the other end of the coil of the contactor KM1 is connected to one end of the first group of contacts (normally open) of the time relay KT1, The other end of the first group of contacts of the time relay KT1 is connected to the 24V end of the AC-DC module U1; the two ends of the second group of contacts of the time relay KT1 are respectively connected to the K1 and K2 ends of the current sensing switch U2, one end of the coil of the time relay KT1 is connected to the K1 end of the current sensing switch U2, and the other end of the coil of the time relay KT1 is connected to the GND end of the AC-DC module U1; the K2 end of the current sensing switch U2 is connected to the 24V end of the AC-DC module U1; one end of the buzzer LS1 is connected in series with a resistor R2 and then connected to the K1 end of the current sensing switch U2, and the other end of the buzzer LS1 is connected to the GND end of the AC-DC module U1; one end of the indicator light LED1 is connected in series with a resistor R1 and then connected to the 24V end of the AC-DC module U1, and the other end is connected to the GND end of the AC-DC module U1.
[0021] The specific working principle of the above structure is as follows: after the three-pin plug 1 is connected to the power supply, the manual switch S1 is pressed, the current monitoring circuit board 100 is powered on, and the indicator LED1 is lit, indicating that the circuit power supply is normal. The current sensing switch U2 monitors the current at the L end of the three-pin plug 1 in real time. When the current exceeds the upper limit value set by the current sensing switch U2, the K1 and K2 ends of the current sensing switch U2 are connected, and the buzzer LS1 is turned on to start the alarm, reminding the power user that the power supply current is overloaded, and the power supply is disconnected or the power consumption is reduced in time. At the same time, the time relay KT1 is turned on to start timing. If the power supply current is still in an overload state after the time relay KT1 timing is completed, the first group of contacts of the time relay KT1 is closed at this time, and the contactor KM1 is powered on to disconnect the contacts, cutting off the output current of the terminal P2. At the same time, the second group of contacts of the time relay KT1 is closed, and the K1 and K2 ends of the current sensing switch U2 are short-circuited to ensure that after the power supply of the terminal P2 is cut off (the current sensing switch U2 is restored), the buzzer LS1 and the time relay KT1 are still in the power-on state (alarm and power off) until the staff disconnects the manual switch S1.
[0022] Specifically, Figure 1As shown, the manual switch S1 and the indicator light LED1 extend from the hole on one end surface of the winding wheel 7, which is convenient for operation and observation; a sound outlet hole 8 is set on one end surface of the winding wheel 7 to facilitate the transmission of the alarm sound of the buzzer LS1.
[0023] Specifically, Figure 1 , 2 As shown, the bracket 10 is rotatably connected to the winding wheel 7 via a rotating shaft 14; the upper end of the bracket 10 is bent to form a handle 13, which is convenient for taking and placing the device; two horizontal legs 11 are provided at the lower end of the bracket 10, and an insulating sleeve 12 is sleeved on the legs 11. If the bracket 10 is made of metal conductive material, the insulating sleeve 12 can isolate the device from the ground, further ensuring the safety of power supply.
[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention based on the technical solution and improved concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A safety power supply device for a training workshop, comprising: Three-pin plug; winding wheel; the winding wheel is rotatably mounted on the bracket; A plurality of three-hole sockets and a plurality of two-hole sockets are installed on the end surface of one end of the winding wheel; the characteristic is that: a current monitoring circuit board is arranged inside one end of the winding wheel; the current monitoring circuit board has terminals P1, P2 and a current sensing switch U2; the L end of the three-pin plug is connected to the terminal P1 after passing through the monitoring hole on the current sensing switch U2, and the N end of the three-pin plug is connected to the terminal P1; the L ends and N ends of the plurality of three-hole sockets and the plurality of two-hole sockets are connected to the terminal P2; the grounding ends of the plurality of three-hole sockets are connected to the PE end of the three-pin plug.
2. A safe power supply device for a training workshop according to claim 1, characterized in that: The current monitoring circuit board also includes an AC contactor KM1, a time relay KT1, a manual switch S1, an AC-DC module U1, a buzzer LS1, and a current sensing switch U2. The terminal P1 is connected to the input end of the manual switch S1, and the output end of the manual switch S1 is connected to the input end of the AC-DC module U1; the contact of the contactor KM1 is connected in series between the manual switch S1 and the terminal P2, one end of the coil of the contactor KM1 is connected to the GND end of the AC-DC module U1, and the other end of the coil of the contactor KM1 is connected to the GND end of the AC-DC module U1. One end of the first group of contacts of the time relay KT1 is connected, and the other end of the first group of contacts of the time relay KT1 is connected to the 24V end of the AC-DC module U1; the two ends of the second group of contacts of the time relay KT1 are respectively connected to the K1 and K2 ends of the current sensing switch U2, one end of the coil of the time relay KT1 is connected to the K1 end of the current sensing switch U2, and the other end of the coil of the time relay KT1 is connected to the GND end of the AC-DC module U1; the K2 end of the current sensing switch U2 is connected to the 24V end of the AC-DC module U1.
3. A safe power supply device for a training workshop according to claim 2, characterized in that: The current monitoring circuit board also includes a buzzer LS1, one end of the buzzer LS1 is connected in series with a resistor R2 and then connected to the K1 end of the current sensing switch U2, and the other end of the buzzer LS1 is connected to the GND end of the AC-DC module U1.
4. A safe power supply device for a training workshop according to claim 3, characterized in that: The current monitoring circuit board also includes an indicator light LED1. One end of the indicator light LED1 is connected in series with a resistor R1 and then connected to the 24V end of the AC-DC module U1, and the other end is connected to the GND end of the AC-DC module U1.
5. A safe power supply device for a training workshop according to claim 4, characterized in that: The manual switch S1 and the indicator light LED1 extend from holes on one end surface of the winding wheel; a sound outlet hole is arranged on one end surface of the winding wheel.
6. A safe power supply device for a training workshop according to claim 1, characterized in that: The bracket is rotatably connected to the winding wheel via a rotating shaft; the upper end of the bracket is bent to form a handle; the lower end of the bracket is provided with two horizontal legs, and the legs are sleeved with insulating sleeves.