Current sensor internal fixing support and water cooling integrated device

Abstract

The utility model discloses a current sensor internal fixing support and water cooling integrated device, the device comprises a circuit board fixing support and a water cooling pipeline arranged in a snakelike manner, the fixing support can respectively fix a probe plate and a signal processing plate, and a current sensor combining magnetic shunting and magnetic aggregation technologies is manufactured. Cooling water circulates in the water-cooling pipeline which is arranged in a snakelike manner, so that the circuit board mounted on the surface of the fixed bracket can be cooled, and the temperature drift of the sensor is reduced; according to the utility model, the whole sensor is more integrated and miniaturized, high-precision and wide-range current detection can be realized under the condition that the size of the magnetic ring is as small as possible, and wide-range, high-precision and high-resolution current detection is met.

Description

Technical Field

[0001] The utility model relates to the field of current sensors and water cooling and heat dissipation, and in particular to an internal fixing bracket and water cooling integrated device of a current sensor. Background Art

[0002] Commonly used current sensors in the market, such as Rogowski coils, current transformers, fluxgate current sensors, Hall current sensors and magnetoresistive current sensors, all detect current indirectly by measuring the magnetic field generated by the current-carrying wire being tested. They all require a signal processing board to process, filter and transmit the signal obtained at the front end, and the Hall current sensors and magnetoresistive current sensors also require a probe board made of a sensor chip for signal detection. The utility model designs an internal fixed bracket and water cooling integrated device for a current sensor, which can fix the probe board and the signal processing board on the bracket, and the bracket has a serpentine curved arrangement of pipes inside, and cooling water can be passed into the pipes to dissipate heat and cool the probe board and the signal processing board.

[0003] The Hall current sensors and magnetoresistive current sensors currently on the market are single-range current sensors that use a magnetic gathering structure. The sensor chip can be placed in the air gap of the magnetic ring. They are not suitable for the sensor chip installation method of magnetic shunt technology, nor can they meet the structural design of a single magnetic ring with multiple ranges. In addition, when performing large current detection, the probe board and signal processing board of the current sensor generate severe heat, and high temperature drift reduces the performance indicators such as the linearity and accuracy of the sensor. However, the current current sensor does not have a good heat dissipation method, and has not used water cooling. In order to solve the above problems, the utility model designs a mounting bracket that can fix multiple probe boards and signal processing boards for magnetic shunt technology and sub-range current detection. Each side of the fixed bracket has pipes arranged in a serpentine shape, and cooling water can be passed in to perform heat dissipation treatment on the circuit board, thereby reducing the temperature drift of the current sensor and improving the detection accuracy and thermal stability.

[0004] There are also some cases of water cooling devices at present. For example, the patent number is CN213485477U, and the name is a water cooling device for a displacement sensor. This utility model patent designs a water cooling device for a continuous casting crystallizer vibration displacement sensor, which is suitable for harsh environments; but its design scheme is only applicable to displacement sensors, and there is a lack of a sensor fixing device. The utility model patent with the patent number CN202582731U designs a water cooling device for an infrared array sensor. This patent designs a water cooling device that is easy to install and disassemble, has good installation airtightness, and reduces the maintenance cost of the system. Combining the above two patents, it can be seen that most of the existing designs are only water cooling devices, lack sensor mounting brackets, and there is no sensor mounting bracket and water cooling integrated device designed for detecting large currents.

[0005] By comparing the existing patents with the present utility model, it can be found that the present design has unique advantages. The fixed bracket is divided into a front polyhedron structure and a rear polyhedron structure. The front polyhedron mounting bracket can fix multiple probe boards and extend into the inside of the magnetic ring, while the rear polyhedron fixed bracket can fix multiple signal processing boards on the outside. The two mounting brackets are integrated into one. In addition, each surface of the fixed bracket is arranged with water pipes in a serpentine shape, and cooling water can be introduced for cooling and heat dissipation. The current sensor fixed bracket and water cooling device involved in the present utility model technology not only realize an integrated assembly design, but also have a compact arrangement, reasonable layout, convenient installation, and high efficiency and practicality. Summary of the invention

[0006] The purpose of the utility model is to design an internal fixing bracket and water cooling integrated device that can be applied to Hall current sensors or magnetoresistive current sensors; the utility model uses an internal fixing bracket to fix a probe plate for current detection, realizes the combination of magnetic shunt technology and magnetic focusing technology, and can achieve high-precision and wide-range detection of current when the magnetic ring size is as small as possible; in addition, a cooling water circulation pipeline is designed on the fixing bracket, which can reduce the temperature rise of the circuit board and reduce the temperature drift of the system test.

[0007] An integrated device for internal fixing bracket and water cooling of a current sensor, comprising a front polyhedral probe plate fixing bracket, a rear polyhedral signal processing board fixing bracket and a serpentine-arranged cooling water circulation pipeline;

[0008] The front polyhedron probe plate fixing bracket is made of non-magnetic aluminum alloy material, and further, it is a hexahedron to decahedron structure with a length of 150 to 200 mm, which is used for assembling and fixing the probe plate; when in use, the front polyhedron probe plate fixing bracket is inserted into the magnetic ring as a whole to form a magnetic shunt structure; the front polyhedron probe plate fixing bracket can fix the relative position of the magnetic ring to achieve the effect of magnetic shunt;

[0009] The rear end polyhedron signal processing board fixing bracket is made of aluminum alloy material, and further, has a decahedron to dodecahedron structure with a length of 150 to 200 mm. When in use, the rear end polyhedron signal processing board fixing bracket is placed outside the magnetic ring for assembling and fixing the signal processing board.

[0010] The front end polyhedron probe plate fixing bracket is fixed to the middle of one end surface of the rear end polyhedron signal processing board fixing bracket, and a through-test wire installation hole is opened in the middle of the front end polyhedron probe plate fixing bracket and the rear end polyhedron signal processing board fixing bracket;

[0011] A serpentine-arranged cooling water circulation pipe is arranged on each side of the front-end polyhedron probe board fixing bracket and the rear-end polyhedron signal processing board fixing bracket, and a U-shaped water pipe connector is installed on each end face of the bracket, which is used to connect the serpentine-arranged cooling water circulation pipe of each face through the inlet and outlet water pipes to connect the cooling water flow of each face.

[0012] Furthermore, the installation hole of the measured wire is a circular hole with a diameter of 60 to 80 mm.

[0013] Furthermore, a plurality of weight-reducing holes with a diameter of 20 to 30 mm are opened on the rear end polyhedral signal processing board fixing bracket.

[0014] Furthermore, each side of the front octahedral probe plate fixing bracket is provided with a square groove for placing a cooling water circulation pipe, the length and width of the square groove are both 4-5mm, and the length is 200-300mm; each side of the rear dodecahedral signal processing board fixing bracket is provided with a square groove for placing a cooling water circulation pipe, the length and width of the square groove are both 4-5mm, and the length is 400-500mm. The diameter of the inlet and outlet water pipes connecting adjacent cooling water circulation pipes is 5-8mm.

[0015] Furthermore, the polyhedron probe board fixing bracket and the rear polyhedron signal processing board fixing bracket are both provided with a cover plate outside, and the probe board and the signal processing board are fixed by the cover plate.

[0016] Furthermore, a sealing ring slot is provided at the edge of each square groove for placing the cooling water circulation pipeline in the front octahedral probe board fixing bracket and the rear dodecahedral signal processing board fixing bracket for placing the sealing ring.

[0017] The beneficial effects of the utility model are:

[0018] (1) The front polyhedron fixed bracket extends into the magnetic ring, and the probe plate can be fixedly installed to realize the magnetic shunt current detection of the sensor and improve the current detection range of the sensor;

[0019] (2) The rear polyhedron fixing bracket is integrated with the front polyhedron fixing bracket and placed outside the magnetic ring, which can fix the signal processing board without interfering with the magnetic ring. At the same time, it is close to the probe board and the short wiring is conducive to signal stability.

[0020] (3) The fixed bracket is integrated with a serpentine water cooling pipe, which can dissipate heat and cool the circuit board, reduce the temperature drift of the current sensor to a certain extent, and improve the performance index;

[0021] (4) The fixed bracket and the water cooling pipe are combined together for integrated assembly to save space and make the overall design more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a front view of the internal fixing bracket and water cooling integrated device of the current sensor of the utility model;

[0023] Figure 2 It is a side view of the internal fixing bracket and water cooling integrated device of the current sensor of the utility model; DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] like Figure 1 As shown, a current sensor internal fixing bracket and water cooling integrated device includes a front octahedral probe board fixing bracket 1, a rear dodecahedral signal processing board fixing bracket 2 and a serpentine-arranged cooling water circulation pipeline 11.

[0026] In this embodiment, the two fixing brackets are both made of aluminum alloy and processed by CNC. The manufacturing accuracy can reach 50 μm, thereby ensuring the position accuracy of the probe plate installation.

[0027] The front end octahedral probe plate fixing bracket 1 is fixedly set in the middle of an end face of the rear end dodecahedral signal processing board fixing bracket 2, and the cross-section of the front end octahedral probe plate fixing bracket 1 is smaller than the rear end dodecahedral signal processing board fixing bracket 2; in this embodiment, the length of the front end octahedral probe plate fixing bracket is 160mm, and the length of the rear end dodecahedral signal processing board fixing bracket is 180mm.

[0028] like Figure 1 As shown, a serpentine cooling water flow pipe 11 is provided on each side of the fixed bracket, and a U-shaped water pipe connector 7 is installed on each end face of the bracket to connect the cooling water flow of each face, which plays the role of water cooling and heat dissipation, and can effectively reduce the temperature rise of the probe board and the signal processing board;

[0029] In this embodiment, each side of the front octahedral probe plate fixing bracket is provided with a square groove (length and width are 5 mm, total length is 200 mm) for placing the cooling water circulation pipe 11, and the diameter of the inlet and outlet water pipes connecting the adjacent cooling water circulation pipes 11 is 6 mm;

[0030] Each side of the rear end dodecahedron signal processing board fixing bracket is provided with a square groove (length and width are both 5mm, and the groove length is 400mm) for placing the cooling water circulation pipe 11, and the diameter of the inlet and outlet water pipes connecting adjacent cooling water circulation pipes 11 is 6mm.

[0031] Each square groove edge of the front octahedral probe board fixing bracket and the rear dodecahedral signal processing board fixing bracket for placing the cooling water circulation pipeline is provided with a sealing ring clamping groove 12 for placing the sealing ring.

[0032] After installing the sealing ring, cover the octahedron body cover 9 and the dodecahedron body cover 10, and fix the octahedron body cover 9 and the dodecahedron body cover 10 to the front octahedron probe board fixing bracket and the rear dodecahedron signal processing board fixing bracket by screws 5, which can effectively avoid line failures caused by pipeline leakage.

[0033] The upper surface of the dodecahedron cover plate is provided with a chip mounting groove 8. When the signal processing board 4 is installed, the chip fits tightly into the square groove to form an integrated design.

[0034] like Figure 2 As shown, a through-hole 13 for mounting the measured wire with a diameter of 60 mm is opened in the middle of the front polyhedron probe board fixing bracket and the rear polyhedron signal processing board fixing bracket, and a weight reduction hole 14 with a diameter of 25 mm is opened on the rear polyhedron.

[0035] Based on the above-mentioned current sensor internal fixing bracket and water cooling integrated device, there is the following assembly method, which specifically includes the following steps:

[0036] The first step is to install a sealing ring on the octahedral probe board fixing bracket and the dodecahedral signal processing board fixing bracket;

[0037] The second step is to fasten the movable body cover with screws 5. In this embodiment, the octahedral fixing bracket and the dodecahedral fixing bracket are fixed with 10 M4 screws. When tightening the screws, a fixed torque tool should be used to tighten them in a diagonal manner to avoid poor sealing;

[0038] The third step is to install the water pipe joints and the inlet and outlet pipes, wherein the water pipe inlet and outlet 6 are arranged on any two adjacent water pipe joints of the rear end dodecahedron signal processing board fixing bracket away from the end face of the front end octahedron probe board fixing bracket. After the pipeline is installed, a sealing test is performed to ensure that the water cooling system is well sealed to avoid leakage and damage to the product;

[0039] The fourth step is to fix the probe board 3 and the signal processing board 4 on the octahedron fixing bracket and the dodecahedron fixing bracket respectively, integrate the magnetic ring and the fixing bracket, and adjust the relative position of the probe board 3 and the magnetic ring. The front polyhedron probe board fixing bracket is inserted into the magnetic ring as a whole, and the relative position of the magnetic ring is fixed; the rear polyhedron signal processing board fixing bracket is placed outside the magnetic ring.

[0040] The specific embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A current sensor internal fixing bracket and water cooling integrated device, characterized in that: It includes a front-end polyhedral probe plate fixing bracket, a rear-end polyhedral signal processing board fixing bracket and a serpentine-arranged cooling water circulation pipeline; The front polyhedron probe plate fixing bracket is made of non-magnetic aluminum alloy material and is used for assembling and fixing the probe plate; when in use, the front polyhedron probe plate fixing bracket is inserted into the magnetic ring as a whole to form a magnetic shunt structure; the front polyhedron probe plate fixing bracket can also fix the relative position of the magnetic ring to achieve the effect of magnetic shunt; The rear polyhedron signal processing board fixing bracket is made of aluminum alloy material. When in use, the rear polyhedron signal processing board fixing bracket is placed outside the magnetic ring for assembling and fixing the signal processing board. The front end polyhedron probe plate fixing bracket is fixed to the middle of one end surface of the rear end polyhedron signal processing board fixing bracket, and a through-test wire installation hole is opened in the middle of the front end polyhedron probe plate fixing bracket and the rear end polyhedron signal processing board fixing bracket; A serpentine-arranged cooling water circulation pipe is arranged on each side of the front-end polyhedron probe board fixing bracket and the rear-end polyhedron signal processing board fixing bracket, and a U-shaped water pipe connector is installed on each end face of the bracket, which is used to connect the serpentine-arranged cooling water circulation pipe of each face through the inlet and outlet water pipes to connect the cooling water flow of each face.

2. The current sensor internal fixing bracket and water cooling integrated device according to claim 1, characterized in that: The overall structure of the front polyhedron probe plate is hexahedron to decahedron, with a length of 150-200 mm; the overall structure of the rear polyhedron signal processing board fixing bracket is decahedron to dodecahedron, with a length of 150-200 mm.

3. The current sensor internal fixing bracket and water cooling integrated device according to claim 1, characterized in that: The installation hole of the measured wire is a round hole with a diameter of 60 to 80 mm.

4. The current sensor internal fixing bracket and water cooling integrated device according to claim 1, characterized in that: The rear end polyhedral signal processing board fixing bracket is provided with a plurality of weight-reducing holes with a diameter of 20 to 30 mm.

5. The current sensor internal fixing bracket and water cooling integrated device according to claim 1, characterized in that: Each side of the front end octahedral probe plate fixing bracket is provided with a square groove for placing the cooling water circulation pipe, the length and width of the square groove are both 4 to 5 mm, and the length is 200 to 300 mm; each side of the rear end dodecahedral signal processing board fixing bracket is provided with a square groove for placing the cooling water circulation pipe, the length and width of the square groove are both 4 to 5 mm, and the length is 400 to 500 mm.

6. The current sensor internal fixing bracket and water cooling integrated device according to claim 1, characterized in that: The diameter of the inlet and outlet water pipes connecting adjacent cooling water circulation pipes is 5 to 8 mm.

7. The current sensor internal fixing bracket and water cooling integrated device according to claim 1, characterized in that: The polyhedron probe plate fixing bracket and the rear polyhedron signal processing board fixing bracket are both provided with a cover plate outside, and the probe plate and the signal processing board are fixed by the cover plate.

8. The current sensor internal fixing bracket and water cooling integrated device according to claim 5, characterized in that: Each square groove edge of the front octahedral probe board fixing bracket and the rear dodecahedral signal processing board fixing bracket for placing the cooling water circulation pipeline is provided with a sealing ring slot for placing the sealing ring.

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