Short-circuit fault current-limiting protector

Abstract

The utility model discloses a short-circuit fault current-limiting protector, which comprises a lower-layer protection shell, a current-limiting protection mechanism and a wiring mechanism, the upper-layer protective shell is placed at the upper end of the lower-layer protective shell, uniformly distributed threaded connection holes are formed in the upper ends of the lower-layer protective shell and the upper-layer protective shell, connection bolts are in threaded connection between the vertically adjacent threaded connection holes, and symmetrically distributed connection plates are fixedly connected to the left end and the right end of the lower-layer protective shell; mounting holes are formed in the upper ends of the connecting plates; the current-limiting protection mechanism is arranged at the upper end of the upper-layer protection shell, and the lower end of the current-limiting protection mechanism is fixedly connected with the upper end of the lower-layer protection shell; the short-circuit fault current-limiting protector and the short-circuit fault current-limiting protector device can be conveniently combined with an external circuit connector and can be conveniently disassembled and connected, whether a short circuit occurs or not is judged through a resistor, and the circuit can be rapidly and stably disconnected.

Description

Technical Field

[0001] The utility model relates to the technical field of current limiting protectors, in particular to a short-circuit fault current limiting protector. Background Art

[0002] The current limiting protector can monitor and protect the circuit. It can monitor the circuit's load, negative pressure, short circuit, cable temperature and leakage. When problems such as overload, overvoltage, undervoltage, short circuit, high cable temperature and leakage occur, the staff can be reminded through the alarm and warning light. The traditional short-circuit fault current limiting protector connects the external line to the device with bolts. When the rotation force is too large, it is easy to damage the external line. For this reason, we propose a short-circuit fault current limiting protector. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a short-circuit fault current limiting protector. The device is easy to combine with an external line connector, easy to disassemble and connect, and can judge whether there is a short circuit through resistance, and quickly and stably disconnect the line, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a short-circuit fault current limiting protector, comprising a lower protective shell, a current limiting protection mechanism and a wiring mechanism;

[0005] Lower protective shell: The upper protective shell is placed on the upper end thereof, and evenly distributed threaded connection holes are opened on the upper ends of the lower protective shell and the upper protective shell, and connecting bolts are threadedly connected between the vertically adjacent threaded connection holes, and the left and right ends of the lower protective shell are fixedly connected with symmetrically distributed connecting plates, and the upper ends of the connecting plates are opened with mounting holes;

[0006] Current limiting protection mechanism: it is arranged at the upper end of the upper protective shell, and the lower end of the current limiting protection mechanism is fixedly connected to the upper end of the lower protective shell;

[0007] Wiring mechanism: It is arranged at the front end of the lower protective shell. The device is convenient for combination with the external line connector, easy to disassemble and connect, and determines whether there is a short circuit through resistance, so as to quickly and stably disconnect the line.

[0008] Furthermore, the current limiting protection mechanism includes a thermistor, a current limiting resistor, a single-chip microcomputer, a MOS tube and a support plate. The single-chip microcomputer is fixedly connected to the upper end of the upper protective shell, the input end of the single-chip microcomputer is electrically connected to the external power supply, the upper end of the lower protective shell is fixedly connected to the support plate, the upper ends of the support plate are respectively fixedly connected to the thermistor, the current limiting resistor and the MOS tube, the input end of the single-chip microcomputer is electrically connected to the output end of the thermistor, the input end of the MOS tube is electrically connected to the output end of the thermistor, and the input end of the thermistor is electrically connected to the output end of the current limiting resistor, so as to realize current limiting protection for the circuit.

[0009] Furthermore, the current limiting protection mechanism also includes an alarm and a protective groove. The protective groove is opened at the upper end of the upper protective shell. The interior of the protective groove is fixedly connected to the alarm. The input end of the alarm is electrically connected to the output end of the single-chip microcomputer to achieve stable alarm reminder.

[0010] Furthermore, the wiring mechanism includes a wiring copper sheet, a rubber sandwich plate, a guide column, a wiring groove, a threaded rod, a worm wheel and a worm, the worm wheel is rotatably connected to the front end of the lower protective shell, the lower protective shell is rotatably connected with a threaded rod inside, the lower end of the threaded rod is fixedly connected with a worm wheel, the worm wheel is meshingly connected with the worm, the front end of the lower protective shell is provided with evenly distributed wiring grooves, the three wiring grooves are connected, the outer surface of the threaded rod is threadedly connected with symmetrically distributed rubber sandwich plates, the lower protective shell is fixedly connected with symmetrically distributed guide columns, the outer surfaces of the guide columns are respectively slidably connected with the guide holes opened at the upper end of the rubber sandwich plates, the relative inner sides of the two rubber sandwich plates are fixedly connected with evenly distributed wiring copper sheets, the output ends of the wiring copper sheets inside the leftmost wiring groove are electrically connected to the input ends of the current limiting resistor, the input ends of the wiring copper sheets inside the remaining wiring grooves are electrically connected to the output ends of the MOS tube, and the wiring copper sheets are electrically connected to an external power supply for easy connection with external circuits.

[0011] Furthermore, the wiring mechanism also includes an auxiliary slide groove and an auxiliary slider. The auxiliary slide groove is opened inside the lower protective shell. The interior of the auxiliary slide groove is slidably connected with symmetrically distributed auxiliary sliders. The left ends of the auxiliary sliders are fixedly connected to the right ends of the laterally adjacent rubber plywood to provide auxiliary sliding support for the wiring device.

[0012] Furthermore, it also includes a connecting slide groove, which is opened at the lower end of the lower protective shell to provide a sliding connection to facilitate the installation of the device.

[0013] Furthermore, it also includes heat dissipation holes, which are respectively opened at the left and right ends of the lower protective shell to facilitate heat dissipation of internal components of the device.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the short-circuit fault current limiting protector has the following advantages:

[0015] During the actual use of the short-circuit fault current limiting protector, the staff inserts the external line connector into the wiring slot so that the external line connector is located between two adjacent wiring copper sheets. Then the staff rotates the knob at the front end of the worm to drive the worm gear to rotate, and the worm gear drives the threaded rod to rotate, so that the two rubber clamping plates move toward the middle along the guide column, so that the rubber clamping plates drive the wiring copper sheets to clamp and fix the external line connector, and the auxiliary slider slides in the auxiliary slide slot to make the wiring copper sheets clamped more stably, which is convenient for quick connection between the device and the external line connector and can avoid virtual connection. During the use of the device, when a short circuit occurs, the The over-current limiting resistor limits the current size, and the thermistor detects the circuit temperature. When the temperature reaches the threshold, the thermistor sends a signal to the MOS tube, causing the MOS tube to quickly cut off the circuit to protect the circuit. Then the thermistor sends a signal to the single-chip microcomputer, so that the single-chip microcomputer sends a signal to the alarm after receiving the signal, causing the alarm to sound. After the staff inspects the circuit, the thermistor detects that the circuit temperature returns to normal, causing the thermistor to send a signal to the MOS tube, causing the MOS tube to connect the circuit to achieve stable short-circuit fault current limiting protection. The device is easy to combine with an external circuit connector, easy to disassemble and connect, and uses resistance to determine whether there is a short circuit, so as to quickly and stably disconnect the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the current limiting protection mechanism of the utility model;

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the wiring mechanism of the utility model.

[0019] In the figure: 1 lower protective shell, 2 current limiting protection mechanism, 21 thermistor, 22 current limiting resistor, 23 single chip microcomputer, 24 MOS tube, 25 support plate, 26 alarm, 27 protection groove, 3 wiring mechanism, 31 auxiliary slide groove, 32 auxiliary slider, 33 wiring copper sheet, 34 rubber clamping plate, 35 guide column, 36 wiring groove, 37 threaded rod, 38 worm gear, 39 worm, 4 connecting plate, 5 mounting hole, 6 upper protective shell, 7 threaded connection hole, 8 connecting bolt, 9 heat dissipation hole, 10 connecting slide groove. 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 1-3 , This embodiment provides a technical solution: a short-circuit fault current limiting protector, comprising a lower protective shell 1, a current limiting protection mechanism 2 and a wiring mechanism 3;

[0022] Lower protective shell 1: an upper protective shell 6 is placed on its upper end, and evenly distributed threaded connection holes 7 are provided at the upper ends of the lower protective shell 1 and the upper protective shell 6, and connecting bolts 8 are threadedly connected between the vertically adjacent threaded connection holes 7, and the left and right ends of the lower protective shell 1 are fixedly connected with symmetrically distributed connecting plates 4, and the upper ends of the connecting plates 4 are provided with mounting holes 5, and also include connecting slides 10, which are provided at the lower end of the lower protective shell 1, and also include heat dissipation holes 9, which are respectively provided at the left and right ends of the lower protective shell 1;

[0023] Current limiting protection mechanism 2: it is arranged at the upper end of the upper protective shell 6, the lower end of the current limiting protection mechanism 2 is fixedly connected to the upper end of the lower protective shell 1, the current limiting protection mechanism 2 includes a thermistor 21, a current limiting resistor 22, a single-chip microcomputer 23, a MOS tube 24 and a support plate 25, the single-chip microcomputer 23 is fixedly connected to the upper end of the upper protective shell 6, the upper end of the lower protective shell 1 is fixedly connected to the support plate 25, the upper end of the support plate 25 is respectively fixedly connected to the thermistor 21, the current limiting resistor 22 and the MOS tube 24, the input end of the single-chip microcomputer 23 is electrically connected to the external power supply, the input end of the single-chip microcomputer 23 is electrically connected to the output end of the thermistor 21, the input end of the MOS tube 24 is electrically connected to the output end of the thermistor 21, the input end of the thermistor 21 is electrically connected to the output end of the current limiting resistor 22, and the current limiting protection mechanism 2 also includes an alarm 26 and a protective groove 27 The protection groove 27 is opened at the upper end of the upper protection shell 6, and the inside of the protection groove 27 is fixedly connected with an alarm 26. The input end of the alarm 26 is electrically connected to the output end of the single-chip computer 23. When a short circuit occurs, the current is limited by the current limiting resistor 22. The thermistor 21 detects the line temperature. When the temperature reaches the threshold, the thermistor 21 sends a signal to the MOS tube 24, so that the MOS tube 24 quickly cuts off the line to protect the line. Then the thermistor 21 sends a signal to the single-chip computer 23, so that the single-chip computer 23 sends a signal to the alarm 26 after receiving the signal, so that the alarm 26 sounds an alarm bell. After the staff inspects the line, the thermistor 21 detects that the circuit temperature returns to normal, so that the thermistor 21 sends a signal to the MOS tube 24, so that the MOS tube 24 connects the line, and stable short-circuit fault current limiting protection is achieved;

[0024] Wiring mechanism 3: It is arranged at the front end of the lower protective shell 1. The wiring mechanism 3 includes a wiring copper sheet 33, a rubber sandwich plate 34, a guide column 35, a wiring slot 36, a threaded rod 37, a worm wheel 38 and a worm 39. The worm 39 is rotatably connected to the front end of the lower protective shell 1. The inner part of the lower protective shell 1 is rotatably connected with the threaded rod 37. The lower end of the threaded rod 37 is fixedly connected with the worm wheel 38. The worm wheel 38 is meshed with the worm 39. The front end of the lower protective shell 1 is provided with evenly distributed wiring slots 36. The three wiring slots 36 are connected in parallel. The outer surface of the threaded rod 37 is threadedly connected with symmetrically distributed rubber sandwich plates 34, and the lower protective shell 1 is fixedly connected with symmetrically distributed guide columns 35. The outer surfaces of the guide columns 35 are respectively slidably connected with the guide holes opened at the upper ends of the rubber sandwich plates 34. The opposite inner sides of the two rubber sandwich plates 34 are fixedly connected with uniformly distributed wiring copper sheets 33. The output ends of the wiring copper sheets 33 in the leftmost wiring slot 36 are electrically connected to the input ends of the current limiting resistor 22, and the input ends of the wiring copper sheets 33 in the remaining wiring slots 36 are electrically connected to the output ends of the MOS tube 24. The wiring copper sheets 33 are electrically connected to the external power supply. The wiring mechanism 3 also includes an auxiliary slide 31 and an auxiliary slider 32. The auxiliary slide 31 is opened in the lower protective shell 1. The auxiliary slide 31 is slidably connected with symmetrically distributed auxiliary sliders 32. The left ends of the auxiliary sliders 32 are fixedly connected with the right ends of the rubber sandwich plates 34 adjacent to each other in the horizontal direction. The external line connector is inserted into the wiring slot 36 so that the external line connector is located between the two adjacent wiring copper sheets 3 3, then the staff rotates the knob at the front end of the worm 39 to rotate the worm 39 to drive the worm wheel 38 to rotate, and the worm wheel 38 drives the threaded rod 37 to rotate, so that the two rubber clamping plates 34 move toward the middle along the guide column 35, so that the rubber clamping plates 34 drive the wiring copper sheet 33 to clamp and fix the external line connector, and the auxiliary slider 32 slides in the auxiliary slide groove 31 to make the wiring copper sheet 33 clamped more stably, which is convenient for the quick connection between the device and the external line connector and can avoid false connection.

[0025] The working principle of a short-circuit fault current limiting protector provided by the utility model is as follows: the lower protective shell 1 is moved to the installation position of the short-circuit fault current limiting protector, and the external bolts are threadedly connected to the screw holes of the installation position of the short-circuit fault current limiting protector through the installation holes 5 to achieve stable fixation of the device. The device can also be installed through an external sliding column to make the connecting slide groove 10 slidingly connected with the external installation sliding column, which is convenient for installation and use of the device. Then the staff inserts the external line connector into the wiring groove 36 so that the external line connector is located between two adjacent wiring copper sheets 33. Then the staff rotates the knob at the front end of the worm 39 to rotate the worm 39 to drive the worm wheel 38 to rotate, and the worm wheel 38 drives the threaded rod 37 to rotate, so that the two rubber clamping plates 34 move toward the middle along the guide column 35, so that the rubber clamping plates 34 drive the wiring copper sheets 33 to clamp and fix the external line connector, and The auxiliary slider 32 assists in sliding in the auxiliary slide groove 31, so that the wiring copper sheet 33 is clamped more stably, which is convenient for the quick connection of the device and the external line connector, and can avoid the virtual connection. During the use of the device, when a short circuit occurs, the current is limited by the current limiting resistor 22, and the thermistor 21 detects the line temperature. When the temperature reaches the threshold, the thermistor 21 sends a signal to the MOS tube 24, so that the MOS tube 24 quickly cuts off the line to protect the line. Then the thermistor 21 sends a signal to the single-chip microcomputer 23, so that the single-chip microcomputer 23 sends a signal to the alarm 26 after receiving the signal, so that the alarm 26 sounds an alarm bell. After the staff inspects the line, the thermistor 21 detects that the circuit temperature returns to normal, so that the thermistor 21 sends a signal to the MOS tube 24, so that the MOS tube 24 connects the line, thereby realizing stable short-circuit fault current limiting protection.

[0026] It is worth noting that the alarm 26 disclosed in the above embodiment can be selected as BJ-1KAC220V, and the single chip microcomputer 23 controls the MOS tube 24 and the alarm 26 to work using methods commonly used in the prior art.

[0027] 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. A short-circuit fault current limiting protector, characterized in that: It comprises a lower protective shell (1), a current limiting protection mechanism (2) and a wiring mechanism (3); Lower protective shell (1): an upper protective shell (6) is placed on its upper end; evenly distributed threaded connection holes (7) are provided at the upper ends of the lower protective shell (1) and the upper protective shell (6); connecting bolts (8) are threadedly connected between vertically adjacent threaded connection holes (7); symmetrically distributed connecting plates (4) are fixedly connected at the left and right ends of the lower protective shell (1); and mounting holes (5) are provided at the upper ends of the connecting plates (4); A current limiting protection mechanism (2): the current limiting protection mechanism (2) is arranged at the upper end of the upper protective shell (6), and the lower end of the current limiting protection mechanism (2) is fixedly connected to the upper end of the lower protective shell (1); Wiring mechanism (3): It is arranged at the front end of the lower protective shell (1).

2. A short-circuit fault current limiting protector according to claim 1, characterized in that: The current limiting protection mechanism (2) comprises a thermistor (21), a current limiting resistor (22), a single chip microcomputer (23), a MOS tube (24) and a support plate (25); the single chip microcomputer (23) is fixedly connected to the upper end of the upper protective shell (6); the upper end of the lower protective shell (1) is fixedly connected to the support plate (25); the upper end of the support plate (25) is respectively fixedly connected to the thermistor (21), the current limiting resistor (22) and the MOS tube (24); the input end of the single chip microcomputer (23) is electrically connected to an external power supply; the input end of the single chip microcomputer (23) is electrically connected to the output end of the thermistor (21); the input end of the MOS tube (24) is electrically connected to the output end of the thermistor (21); and the input end of the thermistor (21) is electrically connected to the output end of the current limiting resistor (22).

3. A short-circuit fault current limiting protector according to claim 2, characterized in that: The current limiting protection mechanism (2) further comprises an alarm (26) and a protection groove (27), wherein the protection groove (27) is provided at the upper end of the upper protective shell (6), the interior of the protection groove (27) is fixedly connected with the alarm (26), and the input end of the alarm (26) is electrically connected to the output end of the single-chip computer (23).

4. A short-circuit fault current limiting protector according to claim 2, characterized in that: The wiring mechanism (3) comprises a wiring copper sheet (33), a rubber sandwich plate (34), a guide column (35), a wiring slot (36), a threaded rod (37), a worm wheel (38) and a worm (39); the worm wheel (39) is rotatably connected to the front end of the lower protective shell (1); the interior of the lower protective shell (1) is rotatably connected to the threaded rod (37); the lower end of the threaded rod (37) is fixedly connected to the worm wheel (38); the worm wheel (38) is meshedly connected to the worm (39); the front end of the lower protective shell (1) is provided with evenly distributed wiring slots (36); the three wiring slots (36) are connected; the outer surface of the threaded rod (37) is threadedly connected to symmetrically distributed wiring slots (36); The lower protective shell (1) is fixedly connected to the inside of the rubber sandwich plate (34) with symmetrically distributed guide posts (35), and the outer surfaces of the guide posts (35) are respectively slidably connected to the guide holes opened at the upper ends of the rubber sandwich plates (34). The opposite inner sides of the two rubber sandwich plates (34) are fixedly connected to evenly distributed wiring copper sheets (33), the output ends of the wiring copper sheets (33) in the wiring slot (36) on the leftmost side are electrically connected to the input ends of the current limiting resistor (22), the input ends of the wiring copper sheets (33) in the other wiring slots (36) are electrically connected to the output ends of the MOS tube (24), and the wiring copper sheets (33) are electrically connected to an external power supply.

5. A short-circuit fault current limiting protector according to claim 4, characterized in that: The wiring mechanism (3) further comprises an auxiliary sliding groove (31) and an auxiliary sliding block (32); the auxiliary sliding groove (31) is disposed inside the lower protective shell (1); the auxiliary sliding groove (31) is slidably connected to the inside of the auxiliary sliding groove (31) with symmetrically distributed auxiliary sliding blocks (32); the left ends of the auxiliary sliding blocks (32) are fixedly connected to the right ends of the rubber sandwiching plates (34) adjacent thereto in the transverse direction.

6. A short-circuit fault current limiting protector according to claim 1, characterized in that: It also comprises a connecting slide groove (10), wherein the connecting slide groove (10) is opened at the lower end of the lower protective shell (1).

7. The short-circuit fault current limiting protector according to claim 1, characterized in that: It also comprises heat dissipation holes (9), which are respectively opened at the left and right ends of the lower protective shell (1).

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