Temperature sensor for circuit breaker contact arm

Abstract

This invention relates to the field of circuit breaker temperature detection, and in particular to a temperature sensor for a circuit breaker contact arm. The temperature sensor is placed within a groove in the circuit breaker contact arm and secured with a magnetic strap, forming an embedded mounting structure. The bottom surface of the temperature sensor contacts the bottom surface of the groove, and the built-in signal processing unit is positioned away from the circuit breaker contact arm. This invention's embedded installation of the temperature sensor within the groove of the circuit breaker contact arm avoids protruding structures on the circuit breaker, simplifying the circuit breaker structure and providing advantages such as convenient installation and disassembly.

Description

Technical Field

[0001] The invention relates to the field of circuit breaker temperature detection, and in particular to a temperature sensor for a circuit breaker contact arm which avoids signal attenuation and realizes embedded installation. Background Art

[0002] Installing a temperature sensor on a circuit breaker is one of the existing and commonly used methods for real-time monitoring of a circuit breaker, among which the circuit breaker contact arm temperature sensor that draws power through a CT is widely used.

[0003] The existing wireless signal receiving and transmitting antenna is located on the side of the sensor. If it is embedded in the circuit breaker contact arm, the wireless signal will not be transmitted or the intensity will be severely attenuated because the contact arm is made of copper. In addition, the existing temperature sensor is fixed on the circuit breaker by clamping the guide tape with screws or bolts, which results in the thickness of the connection between the screws and bolts being too large, resulting in an increase in the size of the structure. In summary, the existing temperature sensor is only suitable for installation on the surface of the circuit breaker contact arm, forming a protruding structure, resulting in occupying a large space and affecting the installation of other accessories.

[0004] Therefore, how to perform embedded installation of a temperature sensor on a circuit breaker contact arm is one of the important technical issues that those skilled in the art need to solve. Summary of the invention

[0005] The object of the present invention is to provide a temperature sensor for a circuit breaker contact arm which avoids signal attenuation and realizes embedded installation, so as to solve the problems that the existing installation method occupies a large space and causes serious signal attenuation.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A temperature sensor for a circuit breaker contact arm, the temperature sensor is placed in a groove provided in the circuit breaker contact arm and fixed by a magnetic binding band to form an embedded installation structure of the temperature sensor;

[0008] The bottom surface of the temperature sensor contacts the bottom surface of the embedding groove, and the built-in signal processing unit of the temperature sensor is arranged away from the circuit breaker contact arm.

[0009] Further preferably: the temperature sensor comprises a housing, a power taking unit and the signal processing unit, wherein:

[0010] The shell is a hollow shell, the bottom surface of which is a contact bottom surface, and the contact bottom surface is provided with contacts facing the inner cavity of the shell;

[0011] The signal processing unit is placed in the housing and connected to the contact;

[0012] The power taking unit is placed in the housing and is located beside the signal processing unit to form a flat structure with the signal processing unit.

[0013] Further preferably, the signal processing unit is a signal processing circuit board, and a wireless signal processing module is installed on a side of the signal processing unit close to the top surface of the shell.

[0014] Further preferably: the height of the temperature sensor is adapted to the depth of the embedding groove;

[0015] The top surface of the shell of the temperature sensor is in an arc shape to match the outer surface of the contact arm of the circuit breaker.

[0016] Further preferably: the magnetic conductive band is arranged through the shell;

[0017] The power taking unit is mounted on the magnetic conductive binding belt.

[0018] Further preferably: the power taking unit comprises a coil frame and a power taking coil, wherein:

[0019] The coil frame is erected in the shell, and is provided with a clearance hole to allow the magnetic conductive band to pass through;

[0020] The power taking coil is mounted on the magnetic conductive binding belt.

[0021] Further preferably, the magnetic conductive binding tape is embedded in the contact arm of the circuit breaker, and the magnetic conductive binding tape comprises a conductive tape and a fixing member, wherein:

[0022] The fixing member is a ring body and is sleeved on the guide tape;

[0023] The end of the guide tape is clamped on the fixing member to form a positioning structure.

[0024] Further preferably, the end of the guide tape is bent toward the fixing member to form a barbed hook structure to engage with the fixing member.

[0025] Further preferably, the conductive tape is a rectangular tape body, the head end of the conductive tape passes through the fixing member and the temperature sensor, and surrounds the circuit breaker contact arm to form an annular double-layer structure.

[0026] Further preferably, the fixing piece is flat, and the size of the center hole thereof is adapted to the guide tape.

[0027] After adopting the above technical solution, the present invention has the following advantages compared with the background technology:

[0028] 1. The power taking unit and the signal processing unit in the temperature sensor of the present invention are arranged flatly, and the signal processing unit is arranged away from the circuit breaker contact arm, so as to achieve the purpose of placing the signal processing unit on the top, so as to effectively avoid the attenuation of the signal caused by the material of the circuit breaker contact arm, and lay a structural foundation for the embedded installation of the temperature sensor;

[0029] 2. The temperature sensor of the present invention is fixedly mounted on the contact arm of the circuit breaker by means of a magnetic binding tape, and the conductive tape in the magnetic binding tape is connected by means of a fixed part, thereby realizing convenient and quick installation of the temperature sensor, reducing the size of the structure at the connection, and further laying a structural foundation for embedded installation of the temperature sensor;

[0030] 3. The temperature sensor of the present invention is installed in the embedded groove of the contact arm of the circuit breaker, so as to realize the embedded installation of the temperature sensor and avoid the appearance of protruding structural settings on the circuit breaker, thereby simplifying the circuit breaker structure and achieving the advantages of convenient installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of the structure in which the temperature sensor according to an embodiment of the present invention is embedded in the contact arm of the circuit breaker;

[0032] Figure 2 is a schematic diagram of the structure of the temperature sensor and the magnetic conductive binding tape in an embodiment of the present invention;

[0033] Figure 3 is a schematic diagram of the internal structure of the temperature sensor in an embodiment of the present invention;

[0034] Figure 4 It is a schematic structural cross-sectional diagram of the magnetic conductive binding tape at the fixing member in an embodiment of the present invention. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] It should be noted that in the present invention, the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] Example

[0038] like Figure 1 and Figure 3As shown, the present invention discloses a temperature sensor for a circuit breaker contact arm, wherein the temperature sensor 200 is placed in a embedding groove 110 provided in the circuit breaker contact arm 100 and fixed by a magnetic binding band 300 to form an embedded installation structure of the temperature sensor 200; the bottom surface of the temperature sensor 200 contacts the bottom surface of the embedding groove 110, and the signal processing unit of the temperature sensor 200 is arranged away from the circuit breaker contact arm 100, thereby effectively avoiding the occurrence of signal attenuation and the like.

[0039] It should be noted that: Figure 1 As shown, the circuit breaker contact arm 100 is provided with an embedding groove 110, the shape of the embedding groove 110 is adapted to the temperature sensor 200, and the depth of the embedding groove 110 is adapted to the thickness of the temperature sensor 200. Preferably, the temperature sensor 200 is in an arc shape, that is, the upper surface of the temperature sensor is an arc-shaped portion of the surface of the circuit breaker contact arm with a circular cross section; at the same time, the shape of the embedding groove is adapted to the shape of the temperature sensor; in order to achieve that the temperature sensor 200 can be stably and firmly embedded in the embedding groove 110;

[0040] An annular groove 120 is provided next to the embedding groove 110, and the annular groove 120 is connected to the embedding groove 110, and the size of the annular groove 120 is adapted to the magnetic conductive binding tape 300; the temperature sensor 200 is mounted on the magnetic conductive binding tape 300, and is embedded in the embedding groove 110 through the magnetic conductive binding tape 300 and fixedly installed. At this time, the magnetic conductive binding tape 300 is embedded in the annular groove 120 to realize the temperature sensor 200, and the depth of the annular groove 120 is adapted to the thickness of the magnetic conductive binding tape 300, so that the magnetic conductive binding tape 300 is embedded in the contact arm 100 of the circuit breaker;

[0041] The circuit breaker contact arm 100 is a ring-shaped structure. The embedding groove 110 is arranged along the axial direction of the circuit breaker contact arm 100 . The annular groove 120 is a circular groove. The center point of the annular groove 120 is located on the axis of the circuit breaker contact arm 100 .

[0042] Combination Figures 1 to 3 As shown, the temperature sensor 200 includes a housing, a power taking unit 230 and the signal processing unit 220 .

[0043] like Figure 2 and 3As shown, the housing is a rectangular housing, which can be a split housing or an integrated housing. In order to facilitate subsequent equipment repair and maintenance, the housing is preferably a split housing; in this embodiment, the housing is a split housing, which includes an upper shell and a lower shell, the upper and lower shells are connected to each other, and the bottom surface of the lower shell is a contact bottom surface 210, which contacts the bottom surface of the embedding groove 110 (that is, contacts the circuit breaker contact arm 100) to effectively obtain data information of the circuit breaker contact arm 100, and the contact bottom surface 210 is provided with a contact toward the inner cavity of the housing; the long side edge of the housing is arranged along the axial direction of the circuit breaker contact arm 100;

[0044] like Figure 3 As shown, the signal processing unit 220 is placed in the shell and connected to the contact. The signal processing unit 220 is a signal processing circuit board, and a wireless signal processing module is installed on one side of the signal processing circuit board close to the top surface of the shell; specifically, in this embodiment, the signal processing circuit board is a rectangular circuit board placed in the shell, and the wireless signal processing module is a processing module equipped with a signal transmitting antenna. The wireless signal processing module is a common solution on the market for realizing real-time monitoring of the temperature of the circuit breaker contact arm; the wireless signal processing module is located on the upper end surface of the signal processing circuit board, that is, close to a side surface of the upper shell, so as to be away from the circuit breaker contact arm 100, so as to avoid the first occurrence of signal attenuation due to the influence of the metal material of the circuit breaker contact arm 100;

[0045] like Figure 3 As shown, the power taking unit 230 is placed in the housing, next to the signal processing unit 220, so as to form a flat structure with the signal processing unit 220. In this solution, the flat structure design in the power taking unit 230 and the signal processing unit 220 is used to place the signal processing module on the top of the temperature sensor 200, thereby effectively avoiding problems such as signal attenuation caused by the material of the circuit breaker contact arm;

[0046] The power collection unit 230 is installed on the magnetic conductive band 300. Specifically, the power collection unit 230 includes a coil frame 231 and a power collection coil 232. The number of the coil frames 231 is two and they are symmetrically distributed. The coil frame 231 is a sheet-like body with a clearance hole in the middle to allow the magnetic conductive band 300 to pass through. The power collection coil 232 is located between the two coil frames 231 and is installed on the magnetic conductive band 300. The power collection coil 232 is a coil formed by wrapping around the magnetic conductive band 300 between the two coil frames 231.

[0047] Combination Figures 1 to 4As shown, the magnetic conductive tape 300 is placed in the annular groove 120 and is arranged through the shell; the magnetic conductive tape 300 includes a conductive tape 320 and a fixing member 310, the fixing member 310 is a ring body, and is sleeved on the conductive tape 320; the end 321 of the conductive tape 320 is clamped on the fixing member 310 to form a positioning structure;

[0048] like Figures 2 to 4 As shown, the fixing member 310 is a flat tubular body, one end edge of which is clamped with the end 321 of the guide tape 320, and the size of the center hole of the fixing member 310 is adapted to the guide tape 320, that is, only the guide tape 320 is allowed to pass through, and the inner wall of the center hole of the fixing member 310 is attached to the surface of the guide tape 320 to better fix the guide tape 320 and ensure the stability of the structure; the long side length of the fixing member 310 is slightly larger than the width of the guide tape 320, and the center hole is opened in a square shape along the short side of the fixing member, so that the fixing member 310 and the guide tape form a cross-shaped interlaced fixing structure.

[0049] like Figures 2 to 4 As shown, the guide tape 320 is a double-layer structure. Specifically, the guide tape 320 is a rectangular tape body, and its head end 322 passes through the fixing member 310 and the temperature sensor 200, and surrounds the circuit breaker contact arm 100 in a ring shape, and then continues to surround, so that the guide tape 320 obtains a double-layer structure; at this time, the temperature sensor 200 is fixed in the embedding groove 110, the head end 322 of the guide tape is placed on the inner side of the ring-shaped guide tape, and the end 321 of the guide tape is placed on the outer side of the ring-shaped guide tape, and the end 321 is bent outward and clamped with the fixing member 310 for positioning. The above structure can adjust the tightness of the tape by adjusting the position of the end 322, so as to achieve the purpose of disassembling and assembling the temperature sensor 200.

[0050] like Figures 2 to 4 As shown, the end 321 of the guide tape 320 is bent toward the fixing member 310 to form a barb-shaped structure to be engaged with the fixing member 310; the end 321 of the guide tape 320 is an end placed on the outside, which is bent toward the fixing member 310 and is in a barb shape, and the barb-shaped end is clamped at the edge of the long side of the fixing member 310 to achieve the binding and fixing of the guide tape 320;

[0051] It should be noted that the thickness of the fixing member does not exceed the depth of the annular groove.

[0052] like Figures 2 to 4As shown, the fixing member 310 is dragged and inserted into the end 321 of the guide tape 320 to realize the positioning and connection between the fixing member 310 and the guide tape 320, thereby fastening and fixing the temperature sensor 200; conversely, the fixing member 310 is pushed away from the end 321 of the guide tape 320 until the fixing member 310 is detached from the end 321 of the guide tape 320 to loosen the guide tape 320, thereby disassembling the temperature sensor 200.

[0053] Combination Figures 1 to 4 As shown, the structure of fixing the guide tape 320 with the fixing member 310 replaces the existing structure of fixing the tape with screws or bolts, thereby reducing the structural dimensions of the temperature sensor 200, so that the temperature sensor 200 can be stably and safely embedded in the embedding groove 110, so as to effectively realize the embedded installation of the temperature sensor 200; at the same time, the fixing member 310 is dragged along the direction of the guide tape 320 to realize the fastening installation and loosening disassembly of the temperature sensor 200, so as to achieve the purpose of convenient use.

[0054] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A temperature sensor for a circuit breaker contact arm, characterized in that: The temperature sensor is placed in the embedding groove provided in the contact arm of the circuit breaker and fixed by a magnetic conductive band to form an embedded installation structure of the temperature sensor; The bottom surface of the temperature sensor contacts the bottom surface of the embedding groove, and the built-in signal processing unit of the temperature sensor is arranged away from the circuit breaker contact arm; The temperature sensor includes a housing, a power taking unit and the signal processing unit, wherein: The shell is a hollow shell, the bottom surface of which is a contact bottom surface, and the contact bottom surface is provided with contacts facing the inner cavity of the shell; The signal processing unit is placed in the housing and connected to the contact; The power taking unit is placed in the housing and is located beside the signal processing unit to form a flat structure with the signal processing unit; The magnetic conductive binding tape is arranged through the shell; the power taking unit is installed on the magnetic conductive binding tape; The power taking unit comprises a coil frame and a power taking coil. The coil frame stands in the shell and is provided with a clearance hole to allow the magnetic conductive band to pass through. The power taking coil is mounted on the magnetic conductive band. The magnetic conductive tape is embedded in the contact arm of the circuit breaker, and comprises a conductive tape and a fixing member, wherein the fixing member is a ring body and is sleeved on the conductive tape; the end of the conductive tape is clamped on the fixing member to form a positioning structure; The end of the guide tape is bent toward the fixing member to form a barbed hook structure for engaging with the fixing member; The guide tape is a rectangular tape body, the head end of which passes through the fixing member and the temperature sensor and surrounds the circuit breaker contact arm to form an annular double-layer structure.

2. The temperature sensor for the circuit breaker contact arm according to claim 1, characterized in that: The signal processing unit is a signal processing circuit board, and a wireless signal processing module is installed on a side of the signal processing unit close to the top surface of the shell.

3. The temperature sensor for the circuit breaker contact arm according to claim 1, characterized in that: The height of the temperature sensor is adapted to the depth of the embedding groove; The top surface of the shell of the temperature sensor is in an arc shape to match the outer surface of the contact arm of the circuit breaker.

4. The temperature sensor for a circuit breaker contact arm according to claim 1, characterized in that: The fixing piece is flat, and the size of the center hole thereof is matched with the guide tape.

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