Circuit current limiting alarm method and device

Abstract

The invention relates to a circuit current-limiting alarm method and device, and belongs to the technical field of circuit protection, and the circuit current-limiting alarm device comprises a housing, a circuit board fixedly installed in the housing, and two interfaces arranged at one side of the housing and used for connecting positive and negative electrode lines. The series-connected bulbs are used as current-limiting resistors, the electromagnets of the electric bells connected in parallel effectively reduce the resistance of the lamp filaments when the lamp filaments do not emit light, if external equipment is short-circuited, the bulbs are used as electric appliances to bear voltage and give out light to give an alarm, and different brightness and colors can represent serious short-circuit conditions. The electric bell can work under the voltage to give a sound alarm and repeatedly cut off the current at the same time, the wireless transmitting module can also work by utilizing the voltage to give a wireless alarm to indicate a short-circuit line, the voltage of an electric device can be reduced after an alarm mechanism such as a bulb runs, the electric device is subjected to current limiting protection, and the service life of the electric device is prolonged. The bulb and other alarm mechanisms do not need to be replaced after alarming, the normal mode is automatically recovered after short circuit is eliminated, and the later maintenance cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of circuit protection, and particularly relates to a circuit current limiting alarm method and device. Background Art

[0002] Circuit protection mainly protects the components in an electronic circuit from being damaged under conditions such as overvoltage, overcurrent, surge, electromagnetic interference, etc. With the development of science and technology, power / electronic products have become increasingly diversified and complex, and the circuit protection components applied have developed into a new field of electronic components with a wide variety of categories.

[0003] The current limiting alarm of existing circuit protection is usually carried out by fusing a fuse 3. For details, reference can be made to the circuit diagram in the appendix. Figure 3 However, usually a large number of fuses are set. After fusing, the staff cannot quickly find the short-circuited line, and after the fuse is fused, it needs to be replaced, which will increase the later maintenance cost of the circuit protection. There are also multiple self-recovery fuses. Although they can take effect when short-circuited and recover after the short circuit is eliminated and the temperature drops, but when this kind of fuse is short-circuited, the short-circuit position cannot be intuitively felt. Therefore, this application proposes a circuit current limiting alarm method and device. Summary of the Invention

[0004] The purpose of the present invention is to provide a circuit current limiting alarm method and device in order to solve the above problems.

[0005] The present invention realizes the above purpose through the following technical solutions:

[0006] A circuit current limiting alarm device includes a housing, a circuit board fixedly installed in the housing, and two interfaces provided on one side of the housing for connecting positive and negative lines. A light bulb and an electric bell are fixedly installed on the top of the housing. A wireless transmission module is installed on the top of the circuit board. The light bulb, the electric bell and the interfaces are all connected to the circuit board through wires. The interfaces of the housing are connected to a power supply and an electrical device through lines, and a loosening prevention mechanism is provided in the interfaces of the housing.

[0007] As a further optimized solution of the invention, limiting grooves are opened on both sides of the housing. The loosening prevention mechanism includes two groups of ejector rods slidably arranged in the limiting grooves on both sides of the housing and used for clamping the lines in the interfaces after moving, and a plurality of tapered blocks fixedly arranged at one end of the ejector rods and cooperatively inserted into the lines connected to the interfaces.

[0008] As a further optimized solution of the invention, a limiting frame is slidably arranged above the ejector rods between the limiting grooves on both sides of the housing, and a plurality of springs for pushing the limiting frame downward are fixedly arranged in the limiting grooves of the housing.

[0009] As a further optimization scheme of the invention, a non-return mechanism is provided between the push rod and the limit frame for preventing the push rod from moving in the direction of the interface. The non-return mechanism includes a plurality of first bevel teeth fixed at the top of the push rod, and second bevel teeth fixed at the bottom of the limit frame and abutting against one side of the first bevel teeth, and the inclination directions of the first bevel teeth and the second bevel teeth are opposite.

[0010] As a further optimization solution of the invention, one end of the push rod facing away from the interface extends to the outside of the shell, and the top end of the limit frame is located at the top of the shell.

[0011] As a further optimization scheme of the invention, two groups of support rods slidably connected in the shell are fixedly provided at the bottom of the top of the limit frame, and two groups of sliding grooves for the support rods to slide up and down are opened in the shell.

[0012] As a further optimization scheme of the invention, a triangular groove in the opposite direction of the inclination direction of the first bevel tooth is opened at the bottom of the push rod, and a trapezoidal block is fixed at the top of the bottom end of the support rod for abutting against the inclined surface of the triangular groove after the limit frame continues to move upward to guide the push rod toward the outside of the outer shell.

[0013] A circuit current limiting alarm method, based on the above-mentioned circuit current limiting alarm device, comprises: supplying power to an electrical device through a power supply;

[0014] A light bulb connected in series between the power source and the electrical device is used as a current limiting resistor. When the circuit is short-circuited, the light bulb is subjected to voltage and emits light to give an alarm. Different brightness and colors can represent the severity of the short circuit.

[0015] An electric bell connected in parallel with the light bulb will sound an alarm when the short-circuit voltage of the circuit increases;

[0016] A wireless transmitter module connected in parallel with the light bulb will give a wireless alarm when the short-circuit voltage of the circuit increases.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention utilizes the bulbs connected in series as current limiting resistors, and the electromagnet of the parallel bell effectively reduces the resistance of the filament when it is not lit. If the external device is short-circuited, the bulb will bear the voltage and emit light to alarm, and the bell will use the bell to sound an alarm under the voltage, and the wireless transmission module can also use the voltage to work and send out a wireless alarm to indicate the short-circuited line to the staff or the control center. After the alarm mechanism such as the bulb is operated, the voltage of the electrical components will be reduced, so that the electrical components are protected by current limiting. The alarm mechanism such as the bulb does not need to be replaced after the alarm, which reduces the maintenance cost of the circuit protection in the later stage.

[0019] 2. The present invention can connect the positive and negative lines of the circuit to the alarm device through the interface. After pushing the push rod into the interface, under the reverse prevention of the reverse prevention mechanism, the push rod will clamp the line in the interface, and further fix the line by inserting the tapered block into the line, so that the line is not easily detached from the interface when subjected to external force, ensuring the normal use of the device.

[0020] 3. By continuously pulling up the limit frame of the present invention, the first helical gear and the second helical gear in the reverse prevention mechanism can be disengaged first, so that the ejector rod loses the reverse prevention effect. Then, the support rod can drive the trapezoidal block to move upward. The continuously moving upward trapezoidal block will abut against the inclined surface of the triangular groove, and push the ejector rod outward of the housing through the guide, so that the ejector rods in the two interfaces can be pushed away simultaneously, facilitating the staff to quickly remove the device from the circuit line for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic flowchart of a circuit current limiting alarm method according to an embodiment of the present invention;

[0022] Figure 2 is a circuit diagram of a circuit current limiting alarm method according to an embodiment of the present invention;

[0023] Figure 3 is a circuit diagram of the prior art circuit protection;

[0024] Figure 4 is a schematic structural diagram of a circuit current limiting alarm device according to an embodiment of the present invention;

[0025] Figure 5 is a schematic internal structure diagram of a circuit current limiting alarm device according to an embodiment of the present invention;

[0026] Figure 6 is a schematic internal structure connection diagram of the housing, ejector rod and interface of a circuit current limiting alarm device according to an embodiment of the present invention;

[0027] Figure 7 is a circuit current limiting alarm device according to an embodiment of the present invention Figure 6 A structure enlarged view;

[0028] Figure 8 is a circuit current limiting alarm device according to an embodiment of the present invention Figure 6 B structure enlarged view;

[0029] Figure 9 is a circuit current limiting alarm device according to an embodiment of the present invention Figure 6 C structure enlarged view;

[0030] Figure 10 is a connection diagram of the support rod and the trapezoidal block of a circuit current limiting alarm device according to an embodiment of the present invention.

[0031] In the figure: 1. Power supply; 2. Electrical appliance component; 3. Fuse; 4. Light bulb; 41. Electric bell; 42. Wireless transmission module; 5. Housing; 51. Interface; 52. Circuit board; 53. Limiting groove; 54. Sliding groove; 6. Thumb rod; 61. Tapered block; 62. Limiting frame; 63. Spring; 64. First helical gear; 65. Second helical gear; 66. Triangular groove; 7. Support rod; 71. Trapezoidal block. Specific implementation mode

[0032] The following further describes the present application in detail with reference to the accompanying drawings. It is necessary to point out here that the following specific implementation modes are only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0033] Embodiment

[0034] As Figures 4 - 6 shown, a circuit current limiting alarm device includes a housing 5, a circuit board 52 fixedly installed in the housing 5, and two interfaces 51 provided on one side of the housing 5 for connecting positive and negative circuit lines. A light bulb 4 and an electric bell 41 are fixedly installed on the top of the housing 5. A wireless transmission module 42 is installed on the top of the circuit board 52. The light bulb 4, the electric bell 41, and the interface 51 are all connected to the circuit board 52 through wires. The interface 51 of the housing 5 is connected to a power supply 1 and an electrical appliance component 2 through a circuit. An anti-loosening mechanism is provided in the interface 51 of the housing 5. The electric bell 41 can also be replaced with other sound-emitting alarm devices such as a horn or a buzzer. The light bulb 4 can be an LED color-changing lamp that can change color under different voltages and currents.

[0035] The circuit board 52 can connect the circuits of components such as the light bulb 4, the electric bell 41, and the interface 51. The housing 5 can protect components such as the wireless transmission module 42. The two interfaces 51 can be connected to the positive and negative poles of the circuit line.

[0036] As Figures 6 - 8 shown, an anti-loosening mechanism is provided in the interface 51 of the housing 5. Limiting grooves 53 are provided on both sides of the housing 5. The anti-loosening mechanism includes two groups of thumb rods 6 slidably arranged in the limiting grooves 53 on both sides of the housing 5 and used for clamping the circuit in the interface 51 after moving, and a number of tapered blocks 61 fixedly arranged at one end of the thumb rod 6 and inserted into the circuit connected in the interface 51 in a matching manner. After the two thumb rods 6 are pushed towards the interface 51, the circuit can be clamped in the interface 51. Usually, the copper wire of the circuit connection will be first spirally wound and then inserted into the interface 51. At this time, the tapered block 61 in the thumb rod 6 will be inserted into the copper wire wound by the circuit, so as to further fix the circuit and prevent the circuit from falling off from the interface 51 easily when being pulled by an external force, to ensure the normal use of the device.

[0037] like Figures 6 - 8 As shown, a limit frame 62 located above the top rod 6 is slidably provided between the limit grooves 53 on both sides of the shell 5, and a plurality of springs 63 for pushing the limit frame 62 downward are fixedly provided in the limit grooves 53 of the shell 5. The springs 63 can elastically connect the shell 5 and the limit frame 62.

[0038] like Figures 6 - 8 As shown, a non-return mechanism is provided between the push rod 6 and the limit frame 62 for preventing the push rod 6 from moving in the direction of the interface 51. The non-return mechanism includes a plurality of first bevel teeth 64 fixed at the top of the push rod 6, and a second bevel tooth 65 fixed at the bottom of the limit frame 62 and abutting against one side of the first bevel teeth 64. The inclination directions of the first bevel teeth 64 and the second bevel teeth 65 are opposite. Under the elastic force of the spring 63, the second bevel teeth 65 at the bottom of the limit frame 62 will abut against the first bevel teeth 64.

[0039] When the staff pushes the push rod 6 into the interface 51, the first beveled tooth 64 will lift and pass over the second beveled tooth 65 under the guidance of its own beveled surface. Since the second beveled tooth 65 presses against the back side of the first beveled tooth 64, the first beveled tooth 64 and the push rod 6 cannot move toward the outside of the housing 5, thereby preventing the push rod 6 from moving into the interface 51 and improving the stability of the line clamping and fixing.

[0040] like Figures 3 - 6 As shown, one end of the push rod 6 away from the interface 51 extends to the outside of the shell 5, and the top of the limit frame 62 is located at the top of the shell 5. The staff can push the push rod 6 toward the inside of the interface 51 from the outside of the shell 5, and the staff can lift the top of the limit frame 62 on the top of the shell 5 to drive the limit frame 62 to move upward.

[0041] like Figure 6 , Figure 9 and Figure 10 As shown, two groups of support rods 7 slidably connected to the shell 5 are fixedly provided at the bottom of the top of the limit frame 62, and two groups of slide grooves 54 are provided in the shell 5 for the support rods 7 to slide up and down. A triangular groove 66 opposite to the inclination direction of the first oblique tooth 64 is provided at the bottom of the push rod 6, and a trapezoidal block 71 is fixedly provided at the top of the bottom end of the support rod 7 for abutting against the inclined surface of the triangular groove 66 after the limit frame 62 continues to move upward to push the push rod 6 to the outside of the shell 5 through guidance. The limit frame 62 can limit the support rod 7 through the slide groove 54, and the support rod 7 can connect the trapezoidal block 71 and the top of the limit frame 62.

[0042] By continuously pulling up the limit frame 62, the second helical gear 65 can be driven to move upward and disengage from the first helical gear 64 at the bottom, causing the ejector rod 6 to lose its anti-reverse effect. As the support rod 7 is continuously pulled up, the trapezoidal block 71 will be driven to move upward. The continuously upward moving trapezoidal block 71 will abut against the inclined surface of the triangular groove 66 and push the ejector rod 6 outward of the housing 5 through guiding, so that the ejector rod 6 slowly leaves the circuit in the interface 51, thereby pushing the ejector rods 6 in the two interfaces 51 away simultaneously.

[0043] It should be noted that for this circuit current limiting and alarm method and device, during use, first, the positive and negative poles of the circuit line can be respectively inserted into the two interfaces 51. Then, after pushing the two ejector rods 6 toward the interface 51 side, the circuit can be clamped in the interface 51. Usually, the copper wire of the circuit connection will be first spirally wound and then inserted into the interface 51. At this time, the tapered block 61 in the ejector rod 6 will be inserted into the spirally wound copper wire of the circuit, so as to further fix the circuit. And when the ejector rod 6 is pushed into the interface 51, the first helical gear 64 and the second helical gear 65 can prevent the reverse movement of the ejector rod 6, making it difficult for the circuit to fall off from the interface 51 when subjected to external force pulling, to ensure the normal use of the device. Then, components such as the bulb 4 on the housing 5 can perform circuit current limiting and alarm when an external device is short-circuited;

[0044] When it is necessary to remove the device from the circuit line, the staff can continuously pull up the limit frame 62 to drive the second helical gear 65 to move upward and disengage from the first helical gear 64 at the bottom, causing the ejector rod 6 to lose its anti-reverse effect. As the support rod 7 is continuously pulled up, the trapezoidal block 71 will be driven to move upward. The continuously upward moving trapezoidal block 71 will abut against the inclined surface of the triangular groove 66 and push the ejector rod 6 outward of the housing 5 through guiding, so that the ejector rod 6 slowly leaves the circuit in the interface 51, thereby pushing the ejector rods 6 in the two interfaces 51 away simultaneously, facilitating the staff to quickly remove the device from the circuit line for maintenance. The circuit board 52 can connect the circuits of components such as the bulb 4, the electric bell 41, and the interface 51. The housing 5 can protect components such as the wireless transmission module 42. The two interfaces 51 can be connected to the positive and negative poles of the circuit line.

[0045] As Figures 1 - 2 shown, a circuit current limiting and alarm method, based on the above circuit current limiting and alarm device, includes: supplying power to the electrical device 2 through the power supply 1;

[0046] Using the bulb 4 connected in series in the circuit between the power supply 1 and the electrical device 2 as a current limiting resistor, and when the circuit is short-circuited, the bulb 4 emits light to alarm by bearing the voltage. Different brightness and colors can represent the severity of the short circuit;

[0047] Performing a sound alarm through the electric bell 41 connected in parallel with the bulb 4 when the voltage in the circuit increases during a short circuit;

[0048] When the short - circuit voltage in the circuit increases, a wireless alarm is sent through the wireless transmission module 42 connected in parallel with the light bulb 4.

[0049] It should be noted that for this circuit current - limiting alarm method, during use, the series - connected light bulb 4 is used as a current - limiting resistor, and the electromagnet of the parallel - connected electric bell 41 effectively reduces the resistance of the filament when it is not lit (or with a small current. Mainly, the filament has a small resistance at room temperature and a large resistance when it gets hot and emits light. Here, it is used that at room - temperature resistance, the filament acts as a wire, but this resistance is still relatively large compared to a wire; when the current is large, the temperature rises, and the resistance of the light bulb 4 increases. The current - limiting and voltage - limiting functions utilize this increase in resistance. At the same time, the sounding of the electric bell also cuts off the winding of the parallel - connected electromagnet). If the external device is short - circuited, the light bulb 4, acting as an electrical appliance, will bear the voltage and emit light for alarm. Different brightnesses and colors can represent the severity of the short - circuit. And the electric bell 41 will work and sound an alarm at this voltage and will repeatedly cut off the current, resulting in the light bulb 4 flashing, making the alarm more obvious.

[0050] During short - circuit verification, the electric bell 41 will magnetize the electric hammer and attract it to the bell, completely cutting off the circuit of the electric bell 41. (Through experimental verification of the current - limiting device, the resistance of the single light bulb 4 is a bit obvious. The resistance of the electromagnet coil of the electric bell 41 is very small when connected in parallel with the light bulb 4. In this way, the parallel connection overcomes the voltage drop generated by the light bulb 4 at small currents. After over - current, the voltage is mainly borne by the light bulb 4, and the electric bell 41 plays a role in improving the voltage drop caused by the large resistance, sounding an alarm when over - current, and cutting off the path of the electric bell 41 when the current is too large. During normal operation, the light bulb 4 is not lit. When there is a small over - current, the light bulb 4 emits weak light, and the electric bell 41 vibrates. When the over - current is larger, the light bulb 4 flashes, and the electric bell 41 rings. When the over - current is even larger, the light bulb 4 is very bright, and the electric bell 41 is magnetized and disconnected. Of course, different light - emitting light bulbs 4 can be used to replace different circuits and be used in different circuits of robots or test benches).

[0051] The wireless transmission module 42 can also operate using this voltage to send a wireless alarm, indicating the short - circuited line to the staff or the control center. Moreover, after the alarm mechanisms such as the light bulb 4 operate, the voltage of the electrical component 2 will decrease, thereby providing current - limiting protection for the electrical component 2. After the alarm mechanisms such as the light bulb 4 alarm, there is no need to replace them, and they will automatically return to the normal mode after the short - circuit is eliminated, reducing the maintenance cost in the later stage of circuit protection. This application can be used in the field of circuit protection for instruments such as robotic arms and small laboratory instruments.

[0052] The light bulb 4 can be used for alarm prompts in different colors. When the current is small, the light bulb 4 does not emit light. Under the applied voltage, the electric bell 41 cannot work either, and the wireless transmission module 42 will not work. When the short-circuit current in the circuit increases, the resistance of the light bulb 4 will become larger, the voltage it bears will increase, and it will emit colored light for alarm. At this time, the electric bell 41 will sound the alarm, and the wireless transmission module 42 will also work for alarm. Since the voltage of the electrical appliances will decrease after the alarm mechanisms such as the light bulb 4 operate, the electrical appliance 2 is protected by current limiting. Moreover, the light bulb 4 has a large resistance, and the electromagnet in the electric bell 41 has a very small resistance when the current is small and a large resistance after it becomes effective. The parallel connection can just make up for the deficiencies of each other. After the alarm mechanisms such as the light bulb 4 give an alarm, there is no need to replace them, which reduces the maintenance cost in the later stage of circuit protection.

[0053] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A circuit current limiting alarm device, characterized in that: The invention comprises a housing (5), a circuit board (52) fixedly mounted in the housing (5), and two interfaces (51) arranged on one side of the housing (5) for connecting positive and negative lines, wherein a light bulb (4) and an electric bell (41) are fixedly mounted on the top of the housing (5), a wireless transmission module (42) is mounted on the top of the circuit board (52), the light bulb (4), the electric bell (41) and the interface (51) are all connected to the circuit board (52) via wires, the interface (51) of the housing (5) is connected to a power source (1) and an electrical device (2) via lines, and an anti-loosening mechanism is arranged in the interface (51) of the housing (5).

2. The circuit current limiting and alarming device according to claim 1, wherein: Limiting grooves (53) are provided on both sides of the housing (5), and the anti-loosening mechanism comprises two sets of push rods (6) which are slidably arranged in the limiting grooves (53) on both sides of the housing (5) and are used to clamp the circuit in the interface (51) after movement, and a plurality of conical blocks (61) which are fixed at one end of the push rods (6) and are plugged into the circuit connected to the interface (51).

3. The circuit current limiting and alarming device according to claim 2, wherein: A limiting frame (62) located above the top rod (6) is slidably disposed between the limiting grooves (53) on both sides of the shell (5), and a plurality of springs (63) for pushing the limiting frame (62) downward are fixedly disposed in the limiting grooves (53) of the shell (5).

4. The circuit current limiting and alarming device according to claim 3, characterized in that: A back-stop mechanism is provided between the push rod (6) and the limiting frame (62) for preventing the push rod (6) from moving in the direction of the interface (51). The back-stop mechanism comprises a plurality of first oblique teeth (64) fixedly arranged at the top of the push rod (6), and second oblique teeth (65) fixedly arranged at the bottom of the limiting frame (62) and cooperating with and abutting against one side of the first oblique teeth (64). The first oblique teeth (64) and the second oblique teeth (65) have opposite inclination directions.

5. The circuit current limiting and alarming device according to claim 3, characterized in that: One end of the push rod (6) facing away from the interface (51) extends to the outside of the outer shell (5), and the top end of the limiting frame (62) is located at the top of the outer shell (5).

6. The circuit current limiting and alarming device according to claim 4, characterized in that: Two groups of support rods (7) slidably connected to the housing (5) are fixedly provided at the top and bottom of the limiting frame (62), and two groups of sliding grooves (54) for the support rods (7) to slide up and down are provided in the housing (5).

7. The circuit current limiting and alarming device according to claim 6, wherein: The bottom of the push rod (6) is provided with a triangular groove (66) in the opposite direction of the inclination of the first oblique tooth (64), and the top of the bottom end of the support rod (7) is fixed with a trapezoidal block (71) for abutting against the inclined surface of the triangular groove (66) after the limiting frame (62) continues to move upward to push the push rod (6) toward the outside of the housing (5) through guidance.

8. A circuit current limiting alarm method, based on a circuit current limiting alarm device according to any one of claims 1-7, characterized in that, include: Supplying power to an electrical device (2) via a power source (1); A light bulb (4) connected in series in a circuit between a power source (1) and an electrical device (2) is used as a current limiting resistor, and when the circuit is short-circuited, the light bulb (4) is subjected to voltage and emits light to give an alarm, wherein different brightness and colors can represent the severity of the short circuit; When the short-circuit voltage of the circuit increases, an electric bell (41) connected in parallel with the light bulb (4) generates an audible alarm; A wireless transmission module (42) connected in parallel with the light bulb (4) generates a wireless alarm when the short-circuit voltage of the circuit increases.

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