Temperature-limiting current-limiting protector

Abstract

The utility model discloses a temperature-limiting current-limiting protector, which comprises a shell and a protection mechanism, the upper and lower ends of the shell are respectively provided with a wiring terminal head, and the middle part of the left wall of the shell is provided with a current measuring instrument; the protection mechanism comprises a fixing plate, a connecting rod, conducting strips, vertical rods, a mounting plate and conducting columns, the fixing plate is arranged on the upper side of the rear wall of the shell, the connecting rod is arranged in the middle of the lower end of the fixing plate, the conducting strips are arranged at the lower end of the connecting rod, and the vertical rods are arranged on the left side and the right side in the shell respectively; the vertical rods are slidably connected with sliding holes correspondingly formed in the lower end of the mounting plate, conductive columns are arranged at the upper end of the mounting plate, and the conductive pieces and the conductive columns are installed in a matched mode. The temperature-limiting current-limiting protector further comprises a single-chip microcomputer, the single-chip microcomputer is arranged at the front end of the shell, the temperature-limiting current-limiting protector can automatically cut off or connect a circuit according to the magnitude of current, operation is simple, and dangerous situations such as equipment damage or fire disasters are prevented.

Description

Technical Field

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

[0002] A temperature-limiting current-limiting protector is a device that limits the current in a circuit to prevent overheating caused by excessive current, thereby protecting the circuit and equipment from damage. Although it does not directly measure the temperature of the wire, it can indirectly prevent the wire from overheating by limiting the current, thereby ensuring the safe operation of the circuit and equipment.

[0003] During the operation of the temperature-limiting current-limiting protector, a detection device is usually used to detect the current in the circuit. When the current exceeds the current-limiting threshold, the circuit can be automatically cut off through the regulation of the control device to prevent equipment damage or fire and other dangerous situations.

[0004] During the use of the existing temperature-limiting current-limiting protector, when the current in the circuit is less than the current-limiting threshold, the operator is usually required to go to the work site to manually reconnect the circuit. The operation is cumbersome and reduces work efficiency. Some temperature-limiting current-limiting protectors control the connection and disconnection of the circuit through an electronic switch. Although this method reduces the operator's workload and improves work efficiency, equipment such as motors or high-voltage electrical appliances will generate electromagnetic interference to the electronic switch during operation, causing malfunctions, which will cause damage to the equipment connected to the temperature-limiting current-limiting protector. For this reason, we propose a temperature-limiting 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 a temperature-limiting current-limiting protector. Through the coordinated arrangement of the conductive sheet and the conductive column, when the current exceeds the current-limiting threshold, the circuit can be automatically cut off, and when the current in the circuit is less than the current-limiting threshold, the circuit can also be automatically connected, replacing the traditional method of manually connecting the circuit. The operation is simple, and the occurrence of dangerous situations such as equipment damage or fire can be prevented, 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: a temperature-limiting current-limiting protector, comprising a housing and a protection mechanism;

[0007] Shell: The upper and lower ends of the shell are respectively provided with terminal heads, and the middle part of the left wall of the shell is provided with a current measuring instrument;

[0008] Protection mechanism: It includes a fixing plate, a connecting rod, a conductive sheet, a vertical rod, a mounting plate and a conductive column. The fixing plate is arranged on the upper side of the rear wall of the housing. A connecting rod is arranged in the middle of the lower end of the fixing plate. A conductive sheet is arranged at the lower end of the connecting rod. The vertical rods are arranged on the left and right sides of the housing. The vertical rods are slidably connected with the sliding holes corresponding to the lower end of the mounting plate. A conductive column is arranged at the upper end of the mounting plate. The conductive sheet is installed in coordination with the conductive column.

[0009] Wherein: it also includes a single-chip microcomputer, which is arranged at the front end of the shell, the input ends of the upper terminal heads are electrically connected to the external power supply, the input end of the current measuring instrument is electrically connected to the output shaft of the upper terminal heads, the input end of the conductive sheet is electrically connected to the output end of the current measuring instrument, the input end of the conductive column is electrically connected to the output end of the conductive sheet, the input ends of the lower terminal heads are electrically connected to the output end of the conductive column, the input end of the single-chip microcomputer is electrically connected to the external power supply, the current measuring instrument is bidirectionally electrically connected to the single-chip microcomputer, through the coordinated arrangement of the conductive sheet and the conductive column, when the current exceeds the current limiting threshold, the circuit can be automatically cut off, and when the current in the circuit is less than the current limiting threshold, the circuit can also be automatically connected, replacing the traditional method of manually connecting the circuit, the operation is simple, and the occurrence of dangerous situations such as equipment damage or fire is prevented.

[0010] Furthermore, the protection mechanism also includes springs, which are respectively arranged between the lower end of the mounting plate and the bottom wall of the shell. The springs are all sleeved on the outside of the lower side of the vertical pole and can drive the conductive column to move and reset through the mounting plate.

[0011] Furthermore, it also includes a mounting rod and an adjustment plate, wherein the mounting rod is arranged on the lower side of the rear wall of the shell, and the adjustment plates are rotatably connected to the front side of the outer arc surface of the mounting rod through a bearing, the upper ends of the adjustment plates are in contact with the lower surface of the mounting plates, and the front ends of the adjustment plates are provided with limiting grooves, so that the position of the mounting plates can be adjusted through the adjustment plates.

[0012] Furthermore, it also includes a connecting plate and a fixing rod, wherein the connecting plate is slidably connected to the inner wall of the outer shell, and the fixing rod is respectively arranged on the left and right sides of the rear end of the connecting plate, and the rear ends of the fixing rod are respectively located inside the longitudinally adjacent limit grooves, and the adjusting plate can be driven to rotate through the fixing rod.

[0013] Furthermore, it also includes a screw rod, which is rotatably connected to the front side of the bottom wall of the shell through a bearing, and the screw rod is threadedly connected to a threaded hole set in the middle of the lower end of the connecting plate, so that the position of the fixing rod can be adjusted through the connecting plate.

[0014] Furthermore, it also includes a servo motor, which is arranged on the front side of the top wall of the shell, the lower end of the servo motor output shaft is fixedly connected to the upper end of the screw, the input end of the servo motor is electrically connected to the output end of the single-chip microcomputer, and the position of the connecting plate can be adjusted by the screw.

[0015] Furthermore, it also includes mounting holes, which are respectively arranged at the four corners of the front end of the shell, and can be used to install and fix the device.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the temperature limiting current limiting protector has the following advantages:

[0017] When the current exceeds the current limiting threshold, the servo motor starts to run through the regulation of the single-chip microcomputer, and the output shaft of the servo motor drives the screw to rotate. During the rotation, the screw drives the connecting plate to move downward through the threaded connection, and the connecting plate drives the fixing rod to move downward. At this time, the fixing rod rotates inside the limit slot and rotates relative to the limit slot, so that the fixing rod drives the adjustment plate to rotate downward through the limit slot, so that the distance between the two adjustment plates gradually increases. At this time, the tension generated by the contraction of the spring drives the conductive column to move downward through the mounting plate, so that the conductive column is separated from the conductive sheet, and the circuit is cut off to prevent the occurrence of dangerous situations such as equipment damage or fire. Through the coordination of the conductive sheet and the conductive column, when the current exceeds the current limiting threshold, the circuit can be automatically cut off. When the current in the circuit is less than the current limiting threshold, the circuit can also be automatically connected, replacing the traditional method of manually connecting the circuit. The operation is simple and prevents the occurrence of dangerous situations such as equipment damage or fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a front side sectional structural schematic diagram of the utility model.

[0020] In the figure: 1 housing, 2 single chip microcomputer, 3 terminal head, 4 current measuring instrument, 5 protection mechanism, 51 fixing plate, 52 connecting rod, 53 conductive sheet, 54 vertical rod, 55 mounting plate, 56 conductive column, 57 spring, 6 mounting rod, 7 adjustment plate, 8 connecting plate, 9 fixing rod, 10 screw rod, 11 servo motor, 12 mounting hole. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figure 1-2 , this embodiment provides a technical solution: a temperature-limiting current-limiting protector, comprising a housing 1 and a protection mechanism 5;

[0023] Shell 1: The upper and lower ends thereof are respectively provided with terminal heads 3, and the middle part of the left wall of the shell 1 is provided with a current measuring instrument 4. During the operation of the temperature-limiting current-limiting protector, the current measuring instrument 4 can detect the current in the circuit in real time, and the current measuring instrument 4 transmits the detected data to the control device in real time. When the current exceeds the current-limiting threshold, the control device controls the driving device to drive the protection component to move, thereby cutting off the circuit to prevent the occurrence of dangerous situations such as equipment damage or fire;

[0024] The protection mechanism 5 includes a fixing plate 51, a connecting rod 52, a conductive sheet 53, a vertical rod 54, a mounting plate 55 and a conductive column 56. The fixing plate 51 is arranged on the upper side of the rear wall of the housing 1. The middle part of the lower end of the fixing plate 51 is provided with a connecting rod 52. The lower end of the connecting rod 52 is provided with a conductive sheet 53. The vertical rods 54 are respectively arranged on the left and right sides of the interior of the housing 1. The vertical rods 54 are respectively slidably connected with the sliding holes corresponding to the lower end of the mounting plate 55. The upper end of the mounting plate 55 is provided with a conductive column 56. The conductive sheet 53 and the conductive column 56 are installed in coordination. The protection mechanism 5 also includes a spring 57. The spring 57 is respectively arranged between the lower end of the mounting plate 55 and the bottom wall of the housing 1. The spring 57 is sleeved on the outside of the lower side of the vertical rod 54. When the current exceeds the current limiting threshold, the driving device gradually moves downward. At this time, the tension generated by the contraction of the spring 57 drives the conductive column 56 to move downward through the mounting plate 55, so that the conductive column 56 is separated from the conductive sheet 53 to prevent the occurrence of dangerous situations such as equipment damage or fire.

[0025] Among them: it also includes a single-chip microcomputer 2, which is arranged at the front end of the shell 1, the input ends of the upper terminal heads 3 are electrically connected to the external power supply, the input ends of the current measuring instrument 4 are electrically connected to the output shaft of the upper terminal heads 3, the input ends of the conductive sheet 53 are electrically connected to the output ends of the current measuring instrument 4, the input ends of the conductive column 56 are electrically connected to the output ends of the conductive sheet 53, the input ends of the lower terminal heads 3 are electrically connected to the output ends of the conductive column 56, the input ends of the single-chip microcomputer 2 are electrically connected to the external power supply, and the current measuring instrument 4 is bidirectionally electrically connected to the single-chip microcomputer 2, which can regulate the electrical components inside the device.

[0026] Wherein: it also includes a mounting rod 6 and an adjustment plate 7, the mounting rod 6 is arranged on the lower side of the rear wall of the shell 1, the adjustment plates 7 are rotatably connected to the front side of the outer arc surface of the mounting rod 6 through a bearing, the upper ends of the adjustment plates 7 are in contact with the lower surface of the mounting plate 55, and the front ends of the adjustment plates 7 are provided with limiting grooves, so that the driving device drives the adjustment plates 7 to rotate downward through the limiting grooves, so that the distance between the two adjustment plates 7 gradually increases. At this time, the tension generated by the contraction of the spring 57 drives the conductive column 56 to move downward through the mounting plate 55, so that the conductive column 56 is separated from the conductive sheet 53, and the circuit is cut off to prevent the occurrence of dangerous situations such as equipment damage or fire.

[0027] Wherein: it also includes a connecting plate 8 and a fixing rod 9, the connecting plate 8 is slidably connected to the inner wall of the shell 1, the fixing rod 9 is respectively arranged on the left and right sides of the rear end of the connecting plate 8, and the rear ends of the fixing rod 9 are respectively located inside the longitudinally adjacent limiting grooves, and the connecting plate 8 drives the fixing rod 9 to move downward. At this time, the fixing rod 9 rotates inside the limiting groove and rotates relative to the limiting groove, so that the fixing rod 9 drives the adjustment plate 7 to rotate downward through the limiting groove, so that the distance between the two adjustment plates 7 gradually increases. At this time, the tension generated by the contraction of the spring 57 drives the conductive column 56 to move downward through the mounting plate 55.

[0028] Wherein: it also includes a screw 10, which is rotatably connected to the front side of the bottom wall of the shell 1 through a bearing, and the screw 10 is threadedly connected to a threaded hole arranged in the middle of the lower end of the connecting plate 8. During the rotation process, the screw 10 drives the connecting plate 8 to move downward through the threaded connection, and the connecting plate 8 drives the fixing rod 9 to move downward. At this time, the fixing rod 9 rotates inside the limiting groove and rotates relative to the limiting groove, so that the fixing rod 9 drives the adjustment plate 7 to rotate downward through the limiting groove.

[0029] Wherein: it also includes a servo motor 11, the servo motor 11 is arranged on the front side of the top wall of the shell 1, the lower end of the output shaft of the servo motor 11 is fixedly connected to the upper end of the screw 10, the input end of the servo motor 11 is electrically connected to the output end of the single-chip computer 2, when the current exceeds the current limiting threshold, the servo motor 11 starts to run through the regulation of the single-chip computer 2, and the output shaft of the servo motor 11 drives the screw 10 to rotate. During the rotation process, the screw 10 drives the connecting plate 8 to move downward through the threaded connection, and the connecting plate 8 drives the fixing rod 9 to move downward.

[0030] Among them: it also includes mounting holes 12, which are respectively arranged at the four corners of the front end of the shell 1. Before use, the temperature limiting and current limiting protector is moved to the designated work location, and the fastening screws are passed through the mounting holes 12 to connect with the corresponding installation station, thereby achieving support and fixation of the shell 1 and the internal equipment.

[0031] The working principle of a temperature-limiting current-limiting protector provided by the utility model is as follows: before use, the temperature-limiting current-limiting protector is moved to a designated work location, and the fastening screws are passed through the mounting holes 12 to connect with the corresponding mounting stations, thereby supporting and fixing the outer shell 1 and the internal equipment, and then the external wires are connected to the terminal heads 3, so that the temperature-limiting current-limiting protector is connected in series to the circuit. During the operation of the temperature-limiting current-limiting protector, the current measuring instrument 4 can detect the current size in the circuit in real time, and the current measuring instrument 4 transmits the detected data to the single-chip microcomputer 2 in real time. When the current exceeds the current limiting threshold, the servo motor 11 starts to run through the regulation of the single-chip microcomputer 2, and the output shaft of the servo motor 11 drives the screw 10 to rotate. During the rotation, the screw 10 drives the connecting plate 8 to move downward through the threaded connection, and the connecting plate 8 drives the fixing rod 9 to move downward. At this time, the fixing rod 9 rotates inside the limiting groove and rotates relative to the limiting groove, so that the fixing rod 9 passes through the limiting groove. The groove drives the adjustment plate 7 to rotate downward, and the distance between the two adjustment plates 7 gradually increases. At this time, the tension generated by the contraction of the spring 57 drives the conductive column 56 to move downward through the mounting plate 55, so that the conductive column 56 is separated from the conductive sheet 53, and the circuit is cut off to prevent the occurrence of dangerous situations such as equipment damage or fire. When the current in the circuit is less than the current limiting threshold, the servo motor 11 starts to run through the regulation of the single-chip microcomputer 2, and the output shaft of the servo motor 11 drives the screw 10 to rotate. During the rotation process, the screw 10 drives the connecting plate 8 to move upward through the threaded connection, and the connecting plate 8 drives the fixing rod 9 to move upward. At this time, the fixing rod 9 rotates inside the limiting groove and rotates relative to the limiting groove, so that the fixing rod 9 drives the adjustment plate 7 to rotate upward through the limiting groove, so that the distance between the two adjustment plates 7 is gradually reduced. At this time, the mounting plate 55 begins to move upward under the thrust of the adjustment plate 7, and the spring 57 extends, so that the conductive column 56 contacts the conductive sheet 53 again, thereby reconnecting the circuit.

[0032] It is worth noting that the single chip microcomputer 2 disclosed in the above embodiment can be OHR-PR20-XA, the current measuring instrument 4 can be 8716B1, and the servo motor 11 can be ECMA-C20604RS. The single chip microcomputer 2 controls the current measuring instrument 4 and the servo motor 11 to work using methods commonly used in the prior art.

[0033] 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 temperature limiting current limiting protector, characterized in that: It comprises a housing (1) and a protection mechanism (5); The housing (1) is provided with connection terminal heads (3) at the upper and lower ends thereof, and a current measuring instrument (4) is provided in the middle of the left wall of the housing (1); The protection mechanism (5) comprises a fixing plate (51), a connecting rod (52), a conductive sheet (53), a vertical rod (54), a mounting plate (55) and a conductive column (56), wherein the fixing plate (51) is arranged on the upper side of the rear wall of the housing (1), a connecting rod (52) is arranged in the middle of the lower end of the fixing plate (51), a conductive sheet (53) is arranged at the lower end of the connecting rod (52), the vertical rods (54) are arranged on the left and right sides of the housing (1), the vertical rods (54) are respectively slidably connected to the corresponding sliding holes arranged at the lower end of the mounting plate (55), the upper end of the mounting plate (55) is arranged with a conductive column (56), and the conductive sheet (53) and the conductive column (56) are mounted in coordination; The single-chip microcomputer (2) is arranged at the front end of the housing (1); the input end of the upper wiring terminal head (3) is electrically connected to an external power supply; the input end of the current measuring instrument (4) is electrically connected to the output shaft of the upper wiring terminal head (3); the input end of the conductive sheet (53) is electrically connected to the output end of the current measuring instrument (4); the input end of the conductive column (56) is electrically connected to the output end of the conductive sheet (53); the input end of the lower wiring terminal head (3) is electrically connected to the output end of the conductive column (56); the input end of the single-chip microcomputer (2) is electrically connected to the external power supply; and the current measuring instrument (4) is bidirectionally electrically connected to the single-chip microcomputer (2).

2. A temperature limiting current limiting protector according to claim 1, characterized in that: The protection mechanism (5) further comprises a spring (57), wherein the springs (57) are respectively arranged between the lower end of the mounting plate (55) and the bottom wall of the housing (1), and the springs (57) are sleeved on the outside of the lower side of the vertical rod (54).

3. A temperature limiting current limiting protector according to claim 1, characterized in that: It also includes a mounting rod (6) and an adjustment plate (7), wherein the mounting rod (6) is arranged on the lower side of the rear wall of the housing (1), and the adjustment plates (7) are rotatably connected to the front side of the outer arc surface of the mounting rod (6) through a bearing, the upper end of the adjustment plate (7) is in contact with the lower surface of the mounting plate (55), and the front end of the adjustment plate (7) is provided with a limiting groove.

4. A temperature-limiting current-limiting protector according to claim 3, characterized in that: It also comprises a connecting plate (8) and a fixing rod (9), wherein the connecting plate (8) is slidably connected to the inner wall of the outer shell (1), and the fixing rod (9) is respectively arranged on the left and right sides of the rear end of the connecting plate (8), and the rear ends of the fixing rod (9) are respectively located inside the longitudinally adjacent limiting grooves.

5. A temperature-limiting current-limiting protector according to claim 4, characterized in that: It also comprises a screw rod (10), which is rotatably connected to the front side of the bottom wall of the housing (1) via a bearing, and the screw rod (10) is threadedly connected to a threaded hole provided in the middle of the lower end of the connecting plate (8).

6. A temperature-limiting current-limiting protector according to claim 5, characterized in that: It also comprises a servo motor (11), the servo motor (11) being arranged on the front side of the top wall of the housing (1), the lower end of the output shaft of the servo motor (11) being fixedly connected to the upper end of the screw rod (10), and the input end of the servo motor (11) being electrically connected to the output end of the single chip computer (2).

7. The temperature limiting current limiting protector according to claim 1, characterized in that: It also includes mounting holes (12), which are respectively arranged at four corners of the front end of the housing (1).

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