Cross-core type carbon brush current sensor

Abstract

The utility model relates to the technical field of sensors, in particular to a cross-core type carbon brush current sensor, which comprises a shell and a current sensor, an accommodating cavity is arranged in the shell, a colloid is arranged in the accommodating cavity, and a hollow conductive cylinder is arranged in the colloid from top to bottom in a penetrating manner. The current sensors are arranged in the colloid and are in one-to-one correspondence with the conductive columns, the current sensors are installed on the PCB, the conductive screws sequentially penetrate through the current sensors, the PCB, the conductive columns and the bottom of the shell from top to bottom, and the PCB and the current sensors are wrapped in the colloid. The beneficial effects of the utility model are that the conductive screw passes through the conductive cylinder and is combined together with the conductive cylinder, so that a conductive cylindrical structure with a larger diameter is formed in the colloid, which is safer compared with a case for conducting electricity, the copper required for manufacturing the conductive screw and the conductive cylinder is relatively less, and the cost is reduced. And therefore, the manufacturing cost is also reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of through-type carbon brush current sensors, in particular to a through-type carbon brush current sensor. Background Art

[0002] The existing generator's slip ring system is prone to excessive carbon brush current and high temperature during long-term operation. The high temperature caused by excessive current has a great destructive effect on the power system and sometimes causes casualties to operators. It is easy to cause damage to carbon brushes and slip rings, which can easily lead to major accidents.

[0003] Patent No. CN218824457U discloses a six-channel carbon brush current sensor. The insulating top plate is arranged on the top of the copper shell, and the copper shell forms the shell of the sensor. The Hall coil and the circuit board are installed in the cavity formed by the insulating top plate and the copper shell. The bottom surface of the circuit board is provided with six Hall coils in sequence. The circuit board and the insulating top plate are connected and fixed by copper screw sleeves. One end of the circuit board is connected to an aviation plug. It can monitor the carbon brush current of the collector ring in real time, convert and transmit signals in time, improve the safe operation of the equipment, and improve the reaction time of the staff. However, in this patent, it is necessary to rely on the cavity made of copper shell for conduction. The current needs to be conducted one by one from all sides. This is equivalent to increasing the length of the circuit, thereby increasing power consumption. More importantly, pure copper is expensive, and the manufacturing of its shell consumes a large amount of copper, which increases the cost of production.

[0004] In order to address the above problems, a through-type carbon brush current sensor is urgently needed. Summary of the Invention

[0005] The purpose of the present utility model is to provide a through-type carbon brush current sensor to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, a through-type carbon brush current sensor is provided, comprising a housing, a current sensor, a PCB circuit board, a conductive screw, and an aviation plug. The housing is provided with a receiving cavity, in which a colloid is placed. A hollow conductive cylinder is provided through the colloid from top to bottom. The current sensor is arranged inside the colloid and corresponds one-to-one with the conductive cylinder. The current sensor is mounted on the PCB circuit board. The conductive screw passes through the current sensor, the PCB circuit board, the conductive cylinder, and the bottom of the housing in sequence from top to bottom. The PCB circuit board and the current sensor are both wrapped inside the colloid. There are at least two aviation plugs, which are located at both ends of the top of the housing and connected to the PCB circuit board via wires.

[0007] Furthermore, the shell is made of a composite material, wherein the composite material is specifically an aluminum-zinc alloy, and the conductive screw is specifically made of a copper material, wherein the thread is provided at the end, the middle part of the screw is inserted into the conductive column and combined with the conductive column to form a larger conductive cross-section to obtain better conductive performance.

[0008] Furthermore, the current sensor has a rectangular structure, with an opening at the center for the conductive column to pass through, and through holes for the conductive screws to pass through are provided at the bottom of the PCB circuit board and the housing.

[0009] Furthermore, both ends of the PCB circuit board are provided with jacks for fixing wires.

[0010] Furthermore, a total of four groups of connection lines are provided at the connection port of the aviation plug, two of which are power connection lines and the other two are communication connection lines.

[0011] Furthermore, the colloid is specifically formed by integrally casting an epoxy resin material.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The conductive screws pass through the conductive columns and are assembled together, thereby forming a conductive columnar structure with a larger diameter inside the colloid. It should be noted that the shell mentioned in this application is made of composite materials instead of expensive pure copper materials. The conductive screws and the conductive columns are responsible for conducting electricity, which is safer than using the shell for conduction. More importantly, the conductive screws and the conductive columns require relatively less copper to manufacture, thereby reducing the manufacturing cost.

[0014] In the structural design of the conductive screw, the thread is provided at the end, and the middle part of the smooth part can better achieve seamless connection with the conductive column 7, obtain a larger contact area, and also enhance the stability of conduction;

[0015] Two aviation plugs are pulled out from both ends of the PCB circuit board through wires, which include two power connection lines and two communication connection lines. By setting the outlets at both ends, it is convenient for on-site installation and is more convenient than a single-end outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an exploded view of the structure of the present invention.

[0017] The meaning of each number in the figure is:

[0018] 1. Housing; 2. Current sensor; 3. PCB circuit board; 4. Conductive screws; 5. Aviation plug; 6. Colloid; 7. Conductive cylinder. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] Those skilled in the art will understand that, unless otherwise stated, the singular forms "a," "an," and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the stated features, integers, steps, operations, elements, and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0021] See also Figure 1 As shown, a through-type carbon brush current sensor is provided, including a housing 1, a current sensor 2, a PCB circuit board 3, a conductive screw 4 and an aviation plug 5. The interior of the housing 1 is provided with a receiving cavity, in which a colloid 6 is placed. A hollow conductive column 7 is provided through the colloid 6 from top to bottom. The current sensor 2 is arranged on the top of the colloid 6 and corresponds to the conductive column 7 one by one. The current sensor 2 is installed on the PCB circuit board 3. The conductive screw 4 passes through the current sensor 2, the PCB circuit board 3, the conductive column 7 and the bottom of the housing 1 from top to bottom, and finally the conductive screw 4 passes through the bottom of the housing 1. Here, the conductive screw 4 and the conductive column 7 are combined together. , to form a conductive columnar structure with a larger diameter inside the colloid 6. It should be noted that the shell 1 mentioned in this application is made of composite materials instead of expensive pure copper materials. The conductive screws 4 and the conductive columns 7 are responsible for conducting electricity, which is safer than using the shell 1 for conduction. The copper required for the manufacture of the conductive screws 4 and the conductive columns 7 is relatively small, thereby reducing the manufacturing cost. The PCB circuit board 3 and the current sensor 2 are both wrapped inside the colloid 6. The current sensor 2 is specifically a Hall sensor. There are at least two aviation plugs 5, which are located at both ends of the top of the shell 1 and connected to the PCB circuit board 3 through wires.

[0022] Please refer to Figure 1 As shown:

[0023] The housing 1 is made of a composite material, specifically an aluminum-zinc alloy. The conductive screw 4 is specifically made of copper. The middle portion is inserted into the conductive column 7 and combined with the conductive column 7 to form a larger conductive cross-section to obtain better conductive performance. The thread is provided at the end, and the middle portion of the smooth portion can better achieve seamless connection with the conductive column 7, obtain a larger contact area, and also enhance the stability of conduction.

[0024] The current sensor 2 is a rectangular structure, with an opening in the center for the conductive column 7 to pass through, and the PCB circuit board 3 and the bottom of the housing 1 are both provided with through holes for the conductive screws 4 to pass through;

[0025] The two ends of the PCB circuit board 3 are respectively provided with sockets for fixing wires;

[0026] The colloid 6 is specifically formed by integrally casting epoxy resin material;

[0027] In the present application, the housing 1 is a hollow frame-shaped structure, in which several conductive pillars 7 are vertically installed. The current sensor 2 and the PCB circuit board 3 are both mounted on the conductive pillars 7 through through holes, and the conductive screws 4 pass through the conductive pillars 7 from the outside of the housing 1 and finally exit from the bottom thereof. The interior of the housing 1 is filled with epoxy resin to form the colloid 6 in the present application;

[0028] It should be noted that two aviation plugs 5 are pulled out from both ends of the PCB circuit board 3 through wires. There are four sets of connecting wires at the connection port of the aviation plug 5, two of which are power connection wires and the other two are communication connection wires. By arranging the outlets at both ends, it is convenient for on-site installation and is more convenient than a single-end outlet.

[0029] During specific use, after the device of the present application is installed and debugged, it is turned on for the first time, and then it will automatically perform zero-position correction and record the original zero-position data. Subsequently, the amplitude of the current data is monitored in real time during operation and transmitted to the background for data analysis and processing in real time.

[0030] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A through-type carbon brush current sensor, comprising a housing (1), a current sensor (2), a PCB circuit board (3), a conductive screw (4) and an aviation plug (5), characterized in that: The housing (1) is provided with a receiving cavity inside, and a colloid (6) is placed in the receiving cavity. A hollow conductive column (7) is provided through the colloid (6) from top to bottom. The current sensor (2) is provided inside the colloid (6) and corresponds to the conductive column (7) one by one. The current sensor (2) is mounted on the PCB (3). The conductive screw (4) passes through the current sensor (2), the PCB (3), the conductive column (7) and the bottom of the housing (1) from top to bottom. The PCB (3) and the current sensor (2) are all wrapped inside the colloid (6). There are at least two aviation plugs (5), which are respectively located at two ends of the top of the housing (1) and connected to the PCB (3) through wires.

2. The through-type carbon brush current sensor according to claim 1, characterized in that: The housing (1) is made of a composite material, wherein the composite material is specifically an aluminum-zinc alloy. The conductive screw (4) is specifically made of a copper material, with a thread provided at the end thereof, and the middle portion thereof is inserted into the conductive column (7) and combined with the conductive column (7) to form a larger conductive cross-section.

3. The through-type carbon brush current sensor according to claim 2, characterized in that: The current sensor (2) has a rectangular structure, with an opening at its center for the conductive column (7) to pass through, and through holes for the conductive screw (4) to pass through are provided at the bottom of the PCB circuit board (3) and the housing (1).

4. The through-type carbon brush current sensor according to claim 3, characterized in that: Both ends of the PCB circuit board (3) are respectively provided with sockets for fixing wires.

5. The through-type carbon brush current sensor according to claim 1, characterized in that: A total of four groups of connection lines are provided at the connection port of the aviation plug (5), two of which are power connection lines and the other two are communication connection lines.

6. The through-type carbon brush current sensor according to claim 2, characterized in that: The colloid (6) is specifically formed by integrally casting an epoxy resin material.

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