Over-voltage and under-voltage current limiting protector

Abstract

The utility model discloses an over-voltage and under-voltage current-limiting protector, which comprises a shell and a closing switch mechanism, avoiding grooves are formed in the left side wall and the right side wall of the shell, static contacts are arranged in the middles of the upper surfaces of the two avoiding grooves, and a mounting substrate is arranged at the lower end of the shell; the closing switch mechanism comprises a rotating column, a rotating disc, extension plates, a connecting ring, a connecting line and movable contact pieces, the rotating column is rotationally connected to the middle between the upper inner wall and the lower inner wall of the shell, the rotating disc is arranged on the lower side of the outer arc face of the rotating column, the extension plates are arranged on the left side and the right side of the outer arc face of the rotating disc, and the movable contact pieces are arranged at the ends, away from the center of the rotating column, of the upper surfaces of the two extension plates. The outer side faces of the two extension plates are both fixedly connected with one connecting ring, the two movable contact pieces are both fixedly connected with one connecting ring through connecting wires, and the overvoltage and undervoltage current limiting protector is reasonable in power-off structure, high in automation degree and high in reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of over- and under-voltage protectors, in particular to an over- and under-voltage current limiting protector. Background Art

[0002] All electrical appliances have a voltage range. If the voltage is outside a certain range of the rated voltage, it will exceed the insulation strength and withstand voltage of the appliance, causing the appliance to heat up, break down, burn out, or even catch fire. Currently, over- and under-voltage protectors are devices that protect electrical appliances by cutting off power.

[0003] Existing over-voltage and under-voltage protectors are usually installed in the distribution meter box. If the voltage of the electrical appliance is too high or too low, the power supply will be cut off to provide protection for the electrical equipment in the circuit.

[0004] This conventional over-voltage and under-voltage protector has some problems during use. For example, the power-off structure can only achieve power off, and manual assistance is required when powering on. If the voltage of the electrical appliance is overloaded, it is easy to injure the staff. The power-off structure is single, the degree of automation is low, and the reliability is not very high. For this reason, we propose an over-voltage and under-voltage current limiting protector. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the existing defects and provide an over-voltage and under-voltage current limiting protector with high reliability and high degree of automation, which can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an over-voltage and under-voltage current limiting protector, comprising a housing and a closing switch mechanism;

[0007] Shell: The left and right walls are provided with avoidance grooves, the middle part of the upper surface of the two avoidance grooves is provided with static contact pieces, and the lower end of the shell is provided with a mounting base plate;

[0008] Closed switch mechanism: It includes a rotating column, a rotating disk, an extension plate, a connecting ring, a connecting wire and a moving contact piece. The rotating column is rotatably connected to the middle part between the upper and lower inner walls of the shell. A rotating disk is provided on the lower side of the outer arc surface of the rotating column. Extension plates are provided on the left and right sides of the outer arc surface of the rotating disk. Moving contacts are provided on the upper surfaces of the two extension plates at one end away from the center of the rotating column. The outer side surfaces of the two extension plates are fixedly connected to a connecting ring. The two moving contacts are fixedly connected to a connecting ring through connecting wires. The power-off structure is relatively reasonable, the degree of automation is high, and the reliability is strong.

[0009] Furthermore, the closing switch mechanism also includes a stable travel component, which includes a ratchet, a pawl, a reset torsion spring and a rotating shaft. The ratchet is fixedly sleeved on the upper side of the outer arc surface of the rotating column, and the upper inner wall of the outer shell is symmetrically provided with rotating shafts. The lower ends of the outer arc surfaces of the two rotating shafts are rotatably connected with pawls. The upper surfaces of the two pawls and the upper inner wall of the outer shell are provided with reset torsion springs. The two reset torsion springs are respectively movably sleeved on the outer arc surface of the rotating shaft on the same side, and the two pawls are meshed and connected with a ratchet to realize the function of stable rotation.

[0010] Furthermore, it also includes a circuit installation groove, which is respectively opened on the left side and the right side of the shell, and the inside of the circuit installation groove on the right side is fixedly connected with an outlet line, the input end of the left end of the outlet line is electrically connected to the output end of the static contact piece on the right side, and the output end of the right end of the outlet line is electrically connected to an external electrical appliance to realize the power-on function.

[0011] Furthermore, it also includes a single-chip microcomputer, which is arranged on the rear side of the upper surface of the shell, and the input end of the single-chip microcomputer is electrically connected to an external power supply to control the normal operation of the electrical appliance.

[0012] Furthermore, it also includes an access line, which is fixedly connected to the inside of the line installation groove on the left side. An over-voltage and under-voltage detector is provided on the left side of the upper surface of the shell. The input end of the over-voltage and under-voltage detector is electrically connected to the output end of the right end of the access line, the output end of the over-voltage and under-voltage detector is electrically connected to the input end of the static contact piece on the left side, the over-voltage and under-voltage detector is bidirectionally electrically connected to the single-chip computer, and the input end of the left end of the access line is electrically connected to an external power supply device to realize the function of an external power supply.

[0013] Furthermore, it also includes an alarm light, which is arranged on the upper surface of the shell, and the input end of the alarm light is electrically connected to the output end of the single-chip microcomputer to realize the alarm function.

[0014] Furthermore, it also includes a reduction motor, which is arranged in the middle of the upper surface of the shell, the output shaft of the reduction motor is fixedly connected to the upper end of the rotating column, and the input end of the reduction motor is electrically connected to the output end of the single-chip microcomputer to provide driving force when the power is cut off.

[0015] Compared with the prior art, the beneficial effects of the utility model are: the over-undervoltage current limiting protector has the following advantages:

[0016] When the over-voltage and under-voltage current limiting protector is needed, the device is installed on the designated workstation through the mounting substrate. At this time, the power supply can be turned on. The current passes through the static contact piece, connecting ring, connecting wire and moving contact piece on the left and is then led to the external electrical appliance through the static contact piece on the right. At this time, the single-chip microcomputer automatically adjusts the over-voltage and under-voltage detectors, and the over-voltage and under-voltage detectors start to operate, measure the voltage information in real time, and return this information to the single-chip microcomputer in real time. When the voltage rises to 240 volts or drops to 160 volts, the single-chip microcomputer adjusts the reduction motor to operate, and the output shaft of the reduction motor rotates, thereby driving the two extension motors to rotate. The long board rotates 90 degrees with the rotating column as the center. At this time, the static contact piece ends its contact with the moving contact piece. During this period, the pawl tightens the ratchet, and when the ratchet rotates, the pawl slides a specified angle on the side of the ratchet and is affected by the reset torsion spring, so that the pawl can continuously tighten the ratchet to prevent the ratchet from reversing and cut off the current transmission. At this time, the single-chip microcomputer controls the alarm light to light up, alerting the surrounding environment. When the over-voltage and under-voltage detectors detect that the voltage has returned to normal, the single-chip microcomputer controls the reduction motor to continue to form a path to complete the power supply operation. The power-off structure is relatively reasonable, with a high degree of automation and strong reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a schematic cross-sectional view of the closed switch mechanism of the utility model.

[0019] In the figure: 1 housing, 2 closed switch mechanism, 21 rotating column, 22 rotating disk, 23 extension plate, 24 connecting ring, 25 connecting line, 26 moving contact piece, 27 stable travel component, 271 ratchet, 272 pawl, 273 reset torsion spring, 274 rotating shaft, 3 static contact piece, 4 line installation groove, 5 installation base plate, 6 access line, 7 over-voltage and under-voltage detector, 8 single-chip microcomputer, 9 warning light, 10 reduction motor, 11 connecting line. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-2 , This embodiment provides a technical solution: an over-voltage and under-voltage current limiting protector, comprising a housing 1 and a closing switch mechanism 2;

[0022] Shell 1: its left and right walls are provided with avoidance grooves, and static contact pieces 3 are provided in the middle of the upper surfaces of the two avoidance grooves. The lower end of the shell 1 is provided with a mounting substrate 5, and also includes a single-chip microcomputer 8, which is arranged on the rear side of the upper surface of the shell 1, and the input end of the single-chip microcomputer 8 is electrically connected to an external power supply. It also includes an alarm light 9, which is arranged on the upper surface of the shell 1, and the input end of the alarm light 9 is electrically connected to the output end of the single-chip microcomputer 8. The device is installed on a designated station through the mounting substrate 5;

[0023] The closing switch mechanism 2 includes a rotating column 21, a rotating disk 22, an extension plate 23, a connecting ring 24, a connecting line 25 and a moving contact piece 26. The rotating column 21 is rotatably connected to the middle part between the upper and lower inner walls of the housing 1. A rotating disk 22 is provided on the lower side of the outer arc surface of the rotating column 21. The left and right sides of the outer arc surface of the rotating disk 22 are provided with extension plates 23. The upper surfaces of the two extension plates 23 are provided with moving contact pieces 26 at one end away from the center of the rotating column 21. The outer side surfaces of the two extension plates 23 are fixedly connected to a connecting ring 24. The two moving contact pieces 26 are fixedly connected to a connecting ring 24 through a connecting line 25. The closing switch mechanism 2 also includes a stable travel component 27. The stable travel component 27 includes a ratchet 271, a pawl 272, a reset torsion spring 273 and a rotating shaft 274. The ratchet 271 is provided with a ratchet 272, a reset torsion spring 273 and a rotating shaft 274. The wheel 271 is fixedly sleeved on the upper side of the outer arc surface of the rotating column 21, and the upper inner wall of the housing 1 is symmetrically provided with a rotating shaft 274. The lower ends of the outer arc surfaces of the two rotating shafts 274 are rotatably connected with pawls 272. The upper surfaces of the two pawls 272 and the upper inner wall of the housing 1 are provided with reset torsion springs 273. The two reset torsion springs 273 are respectively movably sleeved on the outer arc surfaces of the rotating shaft 274 located on the same side. The two pawls 272 are meshed and connected with a ratchet wheel 271. It also includes a line installation groove 4, which is respectively opened on the left and right sides of the housing 1. The inside of the line installation groove 4 on the right side is fixedly connected with the access line 11. The input end of the left end of the access line 11 is electrically connected to the output end of the static contact piece 3 on the right side, and the output end of the right end of the access line 11 is electrically connected to the The external electrical appliance also includes an access line 6, which is fixedly connected to the inside of the line installation groove 4 on the left side. An over-voltage and under-voltage detector 7 is provided on the left side of the upper surface of the shell 1. The input end of the over-voltage and under-voltage detector 7 is electrically connected to the output end of the right end of the access line 6, and the output end of the over-voltage and under-voltage detector 7 is electrically connected to the input end of the static contact piece 3 on the left side. The input end of the left end of the access line 6 is electrically connected to an external power supply device. The over-voltage and under-voltage detector 7 is bidirectionally electrically connected to the single-chip microcomputer 8. It also includes a reduction motor 10, which is arranged in the middle of the upper surface of the shell 1. The output shaft of the reduction motor 10 is fixedly connected to the upper end of the rotating column 21. The input end of the reduction motor 10 is electrically connected to the output end of the single-chip microcomputer 8. The material of the rotating column 21 is ceramic material. When an over-voltage and under-voltage current limiting protector is needed At this time, the power supply can be turned on, and the current passes through the static contact piece 3, the connecting ring 24, the connecting wire 25 and the moving contact piece 26 on the left side, and is then led out to the external electrical appliance through the static contact piece 3 on the right side. At this time, the single-chip microcomputer 8 automatically adjusts the over-voltage and under-voltage detector 7, and the over-voltage and under-voltage detector 7 starts to operate, measures the voltage information in real time, and returns this information to the single-chip microcomputer 8 in real time. When the voltage rises to 240 volts or the voltage drops to 160 volts, the single-chip microcomputer 8 adjusts the speed reduction motor 10 to operate, and the output shaft of the speed reduction motor 10 rotates, thereby driving the two extension plates 23 to rotate ninety degrees around the rotating column 21. At this time, the static contact piece 3 ends the contact with the moving contact piece 26. During this period, the pawl 272 tightens the ratchet 271, and when the ratchet 271 rotates,The pawl 272 slides a specified angle on the side of the ratchet 271 and is affected by the reset torsion spring 273, so that the pawl 272 can continuously tighten the ratchet 271 to prevent the ratchet 271 from reversing and cut off the transmission of current. At this time, the single-chip microcomputer 8 controls the alarm light 9 to light up to warn the surrounding environment. When the over-voltage and under-voltage detector 7 detects that the voltage has returned to normal, the single-chip microcomputer 8 controls the reduction motor 10 to continue to form a path to complete the power supply operation.

[0024] The working principle of an over-voltage and under-voltage current limiting protector provided by the utility model is as follows: when the over-voltage and under-voltage current limiting protector is needed, the device is installed on the designated workstation through the mounting substrate 5, and the power supply can be turned on at this time. The current passes through the static contact piece 3, the connecting ring 24, the connecting wire 25 and the moving contact piece 26 on the left side and is led out to the external electrical appliance through the static contact piece 3 on the right side. At this time, the single-chip microcomputer 8 automatically adjusts the over-voltage and under-voltage detector 7, and the over-voltage and under-voltage detector 7 starts to operate, measures the voltage information in real time, and returns this information to the single-chip microcomputer 8 in real time. When the voltage rises to 240 volts or the voltage drops to 160 volts, the single-chip microcomputer 8 adjusts the speed reduction motor 10 to operate, and the output of the speed reduction motor 10 The shaft rotates, thereby driving the two extension plates 23 to rotate ninety degrees around the rotating column 21. At this time, the static contact piece 3 ends its contact with the moving contact piece 26. During this period, the pawl 272 tightens the ratchet 271, and when the ratchet 271 rotates, the pawl 272 slides a specified angle on the side of the ratchet 271, and is affected by the reset torsion spring 273, so that the pawl 272 can continuously tighten the ratchet 271 to prevent the ratchet 271 from reversing and cutting off the current delivery. At this time, the single-chip microcomputer 8 controls the alarm light 9 to light up, alerting the surrounding environment. When the over-voltage and under-voltage detector 7 detects that the voltage has returned to normal, the single-chip microcomputer 8 controls the reduction motor 10 to continue to form a path to complete the power supply operation.

[0025] It is worth noting that the single chip microcomputer disclosed in the above embodiment is specifically model S7-200, and the over-voltage and under-voltage detector 7, the alarm light 9 and the reduction motor 10 can be freely configured according to the actual application scenario. It is recommended to use the LM358 model voltage comparator for the over-voltage and under-voltage detector 7, and it is recommended to use the ZGB37RG adjustable speed micro DC reduction motor for the reduction motor 10. The single chip microcomputer 8 controls the over-voltage and under-voltage detector 7, the alarm light 9 and the reduction motor 10 using methods commonly used in the prior art.

[0026] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An over-voltage and under-voltage current limiting protector, characterized in that: It comprises a housing (1) and a closing switch mechanism (2); The housing (1) has a left side wall and a right side wall both provided with avoidance grooves, a static contact piece (3) is provided in the middle of the upper surface of the two avoidance grooves, and a mounting base plate (5) is provided at the lower end of the housing (1); A closed switch mechanism (2): comprising a rotating column (21), a rotating disk (22), an extension plate (23), a connecting ring (24), a connecting wire (25) and a moving contact piece (26); the rotating column (21) is rotatably connected to the middle portion between the upper and lower inner walls of the housing (1); a rotating disk (22) is provided on the lower side of the outer arc surface of the rotating column (21); extension plates (23) are provided on the left and right sides of the outer arc surface of the rotating disk (22); moving contact pieces (26) are provided on the upper surfaces of the two extension plates (23) at one end away from the center of the rotating column (21); the outer side surfaces of the two extension plates (23) are fixedly connected to a connecting ring (24); and the two moving contact pieces (26) are fixedly connected to a connecting ring (24) via connecting wires (25).

2. The over-voltage and under-voltage current limiting protector according to claim 1, characterized in that: The closing switch mechanism (2) further comprises a stable travel assembly (27), the stable travel assembly (27) comprising a ratchet (271), a pawl (272), a reset torsion spring (273) and a rotating shaft (274), the ratchet (271) being fixedly sleeved on the upper side of the outer arc surface of the rotating column (21), the upper inner wall of the housing (1) being symmetrically provided with rotating shafts (274), the lower ends of the outer arc surfaces of the two rotating shafts (274) being rotatably connected with pawls (272), the upper surfaces of the two pawls (272) and the upper inner wall of the housing (1) being provided with reset torsion springs (273), the two reset torsion springs (273) being movably sleeved on the outer arc surface of the rotating shaft (274) located on the same side, and the two pawls (272) being meshingly connected with a ratchet (271).

3. The over-voltage and under-voltage current limiting protector according to claim 1, characterized in that: It also includes a circuit installation groove (4), the circuit installation groove (4) being respectively opened on the left side and the right side of the housing (1), the inside of the circuit installation groove (4) on the right side being fixedly connected with an outlet wire (11), the input end at the left end of the outlet wire (11) being electrically connected to the output end of the static contact piece (3) on the right side, and the output end at the right end of the outlet wire (11) being electrically connected to an external electrical appliance.

4. The over-voltage and under-voltage current limiting protector according to claim 1, characterized in that: It also includes a single-chip microcomputer (8), which is arranged on the rear side of the upper surface of the housing (1), and an input end of the single-chip microcomputer (8) is electrically connected to an external power supply.

5. The over-voltage and under-voltage current limiting protector according to claim 4, characterized in that: The invention also includes an access line (6), wherein the access line (6) is fixedly connected to the inside of the line installation groove (4) on the left side, and an over-voltage or under-voltage detector (7) is provided on the left side of the upper surface of the housing (1), wherein the input end of the over-voltage or under-voltage detector (7) is electrically connected to the output end of the right end of the access line (6), the output end of the over-voltage or under-voltage detector (7) is electrically connected to the input end of the static contact piece (3) on the left side, the over-voltage or under-voltage detector (7) is electrically connected to the single-chip computer (8) in a bidirectional manner, and the input end of the left end of the access line (6) is electrically connected to an external power supply device.

6. The over-voltage and under-voltage current limiting protector according to claim 4, characterized in that: It also comprises an alarm light (9), which is arranged on the upper surface of the housing (1), and an input end of the alarm light (9) is electrically connected to an output end of the single-chip computer (8).

7. The over-voltage and under-voltage current limiting protector according to claim 4, characterized in that: It also includes a reduction motor (10), the reduction motor (10) being arranged in the middle of the upper surface of the housing (1), the output shaft of the reduction motor (10) being fixedly connected to the upper end of the rotating column (21), and the input end of the reduction motor (10) being electrically connected to the output end of the single-chip computer (8).

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