A built-in magnetic sensing metering protection mounting device for an electric energy meter

Abstract

This invention discloses a protective installation device for built-in magnetic sensing metering in an electricity meter, relating to the field of magnetic effect measurement auxiliary technology. The device includes a magnetic shielding assembly, a convection cooling system, a non-magnetic air levitation system, a snap-fit ​​assembly, a temperature compensation assembly, and a magnetic detection assembly. The magnetic shielding assembly adopts a stepped nested structure, comprising, from the inside out, an inner conductive heat dissipation composite layer, a medium-high permeability layer, and an outer reinforcing magnetic layer. A first air gap layer is formed between the inner conductive heat dissipation composite layer and the medium-high permeability layer, and a second air gap layer is formed between the medium-high permeability layer and the outer reinforcing magnetic layer. The edges of each layer form a stepped nested labyrinth magnetic circuit. The lower opening edge of the inner conductive heat dissipation composite layer is bent outward at a 90-degree angle to form a first stepped edge. The medium-high permeability layer is adapted to connect with the inner conductive heat dissipation composite layer. The convection cooling system reduces the impact of temperature drift on metering accuracy and improves heat dissipation performance.

Description

Technical Field

[0001] This invention relates to the field of magnetic effect measurement auxiliary technology, specifically to a built-in magnetic sensing metering protection installation device for electricity meters. Background Technology

[0002] Currently, smart meters generally use magnetic sensing technology to measure current. Their core working principle involves the interaction between the induced magnetic field generated by the measured current and the magnetic sensor, reliably converting the magnetic field signal into an electrical signal, thereby achieving energy measurement. However, in practical applications, existing technologies still suffer from several insurmountable critical defects, severely restricting measurement stability and operational safety.

[0003] In terms of magnetic field protection, existing devices generally lack sufficient anti-interference capabilities. Conventional single-layer metal shielding structures have limited shielding effectiveness against low-frequency, strong magnetic fields. External strong magnetic interference can easily penetrate the shielding layer and act directly on the magnetic sensor, causing magnetic saturation of the magnetic core. This can lead to significant deviations in metering data or even metering failure, creating opportunities for malicious electricity theft and resulting in power metering losses. Even when some structures employ multi-layer shielding designs, they generally suffer from prominent edge magnetic leakage and weak side protection, resulting in unbalanced and incomplete overall magnetic field protection, which fails to meet the requirements for high-reliability protection.

[0004] In terms of heat dissipation and temperature adaptability, the internal space of an energy meter is relatively enclosed, and traditional passive natural convection heat dissipation is inefficient. Magnetic sensors are prone to heat accumulation during long-term continuous operation, leading to an increase in internal temperature. Furthermore, the core magnetic core of the magnetic sensor is highly sensitive to temperature changes; temperature fluctuations directly affect the stability of magnetic permeability, resulting in drift in metering accuracy. Metering errors fluctuate significantly over a wide operating temperature range, failing to meet the accuracy requirements for long-term stable operation of high-precision energy meters.

[0005] Therefore, the industry urgently needs a magnetic sensing metering protection installation device that integrates strong magnetic protection, efficient heat dissipation, and long-term high accuracy to comprehensively solve the defects of existing technologies and improve the metering reliability and protection level of smart energy meters. Summary of the Invention

[0006] The purpose of this invention is to provide a built-in magnetic sensing metering protection installation device for electricity meters to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a built-in magnetic sensing metering protection installation device for an electricity meter, comprising a magnetic shielding component, a convection heat dissipation system, a non-magnetic air levitation system, a snap-fit ​​component, a temperature compensation component, and a magnetic detection component; The magnetic shielding component adopts a stepped nested structure, which includes an inner conductive heat dissipation composite layer, a medium-high magnetic permeability layer and an outer reinforced magnetic permeability layer from the inside to the outside. A first air gap layer is formed between the inner conductive heat dissipation composite layer and the medium-high magnetic permeability layer, and a second air gap layer is formed between the medium-high magnetic permeability layer and the outer reinforced magnetic permeability layer. The edges of each layer form a stepped nested labyrinth magnetic circuit. The lower opening edge of the inner conductive heat dissipation composite layer is bent outward at a 90-degree angle to form the first stepped edge. The medium-high magnetic permeability layer is adapted to be connected to an internal conductive heat dissipation composite layer; the medium-high magnetic permeability layer includes an interlocking bottom compartment and a top cover; the top cover and the first stepped edge are misaligned and overlapped; The external reinforcing magnetic layer is adapted to be connected to a medium-high permeability layer; the external reinforcing magnetic layer includes a top compartment and a bottom cover that interlock; the bottom cover and the medium-high permeability layer are misaligned and overlapped; The convection cooling system adopts an active oscillating structure and is integrated on the inner conductive heat dissipation composite layer. The non-magnetic air-float suspension system is set inside the inner conductive heat dissipation composite layer of the magnetic shielding component, realizing the omnidirectional non-magnetic and non-rigid contact suspension of the magnetic sensor. The snap-fit ​​assembly is located at the bottom of the magnetic shielding assembly and is used to mount the PCB substrate; the temperature compensation assembly and the magnetic detection assembly are integrated on the PCB substrate at the bottom of the magnetic shielding assembly.

[0008] As a preferred embodiment of the present invention, the sidewall of the inner conductive heat dissipation composite layer is uniformly provided with spherical grooves.

[0009] As a preferred embodiment of the present invention, the convection cooling system includes a sphere adapted to a movable insert groove; a swingable fin is fixedly connected to the inner side of the sphere, and a swingable heat-conducting bridge is provided on the outer side of the sphere; Vibration blocks are integrated on the fins; A heat-conducting column is fixedly connected between the middle part of the heat-conducting bridge and the sphere; elastic components are provided between the two ends of the heat-conducting bridge and the inner conductive heat dissipation composite layer. The elastic component includes an elastic sheet and an elastic pad connected to each other. The elastic sheet is fixedly connected to a thermal bridge, and the elastic pad is fixedly connected to an inner conductive heat dissipation composite layer. The convection cooling system is driven by a composite of elastic components.

[0010] As a preferred embodiment of the present invention, the bottom wall of the hopper is provided with intersecting wire holes and pump holes at equal intervals and uniformly through the middle. The top wall edge of the top cover is provided with air holes evenly spaced; the top wall of the top cover is provided with a block groove through the middle.

[0011] As a preferred embodiment of the present invention, the sidewall of the top compartment is equidistantly and uniformly penetrated by support columns that fit the bottom compartment; one end of the support column is located inside the second air gap layer and the other end is located outside the outer reinforcing magnetic layer; The cold compartment is inserted through the middle of the top wall of the top compartment, and the cold compartment holds the top cover; the air hole connects the first air gap layer and the cold compartment; A cold block is inserted through the middle of the top wall of the cold compartment. The lower end of the cold block is adapted to the slot of the insert block and fits the top wall of the inner conductive heat dissipation composite layer. The top of the cold block is connected to the refrigeration unit. A heat transfer rod is fixedly connected between the bottom corner of the cold compartment and the bottom corner of the top compartment, and the heat transfer rod is located within the second air gap layer.

[0012] As a preferred embodiment of the present invention, a buckle block adapted to be inserted through the middle of the bottom wall of the bottom cover is provided, and the buckle block is adapted to support the bottom compartment. The middle of the buckle block is evenly and equidistantly inserted with intersecting wire seats and pump seats; The wire socket is adapted to insert wire holes; the pump socket is adapted to insert pump holes; The lower end of the pump base is connected to the pump pipe, which passes through the cold compartment and is connected to the pump.

[0013] As a preferred embodiment of the present invention, the non-magnetic air levitation system includes an upper-opening static pressure levitation unit, wherein the static pressure levitation unit adopts a double-layer elastic membrane bladder structure. The static pressure suspension unit is fixedly connected with buffer structures at equal intervals and uniformly. The bottom wall of the static pressure suspension unit is equidistantly and evenly perforated with corresponding wire seats, and the wires penetrate the double membrane bladder. The bottom wall of the static pressure suspension unit is equidistantly and evenly penetrated by a pump cylinder with a fixed sleeve pump seat, and the pump cylinder penetrates the outer membrane bladder. The top corner of the static pressure suspension unit is fixedly connected with a pull rope, which passes through the top corner of the inner conductive heat dissipation composite layer and is equipped with a rope clamp. The static pressure suspension unit is filled with dry, high-purity nitrogen gas.

[0014] Compared with the prior art, the beneficial effects of the present invention are: (1) An electric energy meter built-in magnetic sensing metering protection installation device, wherein the convection heat dissipation system can actively cut the air boundary layer, completely destroy the thick laminar flow boundary formed by static natural convection, thereby increasing the air convection heat transfer coefficient inside the inner conductive heat dissipation composite layer, improving the heat transfer efficiency of natural convection in the closed space of the electric energy meter, reducing the heat accumulation of the magnetic sensor during long-term operation, reducing the maximum temperature rise on the surface of the magnetic sensor, improving the temperature field uniformity, reducing the impact of temperature drift on metering accuracy, and improving heat dissipation performance.

[0015] (2) An electric energy meter built-in magnetic sensing metering protection installation device, the convection heat dissipation system adopts the power frequency electromagnetic resonance driving principle, directly uses the inherent power frequency magnetic field vibration energy generated by the current-carrying conductor during the metering process as the power source, without the need for additional power supply and battery, so that the convection heat dissipation system can achieve low energy consumption operation, improve low energy consumption and green environmental protection.

[0016] (3) An electric energy meter with built-in magnetic sensing metering protection installation device, wherein an elastic component is provided between the two ends of the thermal bridge and the inner conductive heat dissipation composite layer. When the fins swing, the elastic sheet of one end of the elastic component is compressed, and the elastic sheet of the other end of the elastic component is pulled. Thus, through the recovery characteristics of the elastic sheet, the swing time of the convection heat dissipation system is extended, thereby further improving the sustainability of heat dissipation.

[0017] (4) An electric energy meter built-in magnetic sensing metering protection installation device, wherein the edges of the inner conductive heat dissipation composite layer, the medium-high magnetic permeability layer and the outer enhanced magnetic permeability layer are mutually constrained and tightly fastened, cutting off the edge leakage magnetic path, reducing the overall edge leakage magnetic amount, improving the side shielding effectiveness, eliminating the magnetic field protection blind zone in all directions, greatly enhancing the device's ability to resist strong magnet theft, and significantly improving the edge leakage magnetic blocking effect.

[0018] (5) An electric energy meter with built-in magnetic sensing metering protection installation device, wherein the support column forms a uniform air gap in the second air gap layer, which not only constructs an independent heat dissipation convection channel to guide the internal heat to be quickly conducted outward, thus improving the temperature uniformity around the magnetic sensor; but also enhances the overall rigidity and impact resistance of the magnetic shielding component through multi-point support, thereby improving the protection level of the device against external impact and crushing damage and extending its service life; thus optimizing heat dissipation and structural strength.

[0019] (6) An electric energy meter with built-in magnetic sensing metering protection installation device, on the one hand, directly cools the top wall of the inner conductive heat dissipation composite layer by the cold block, on the other hand, the cold block cools the air in the cold chamber, the cold air falls, and the cold air in the cold chamber exchanges heat with the hot air in the first air gap layer through the air hole; at the same time, the heat exchange is further enhanced by the support column and heat transfer rod in the second air gap layer.

[0020] (7) A built-in magnetic sensing metering protection installation device for an electricity meter, wherein the static pressure suspension unit is suspended in the inner conductive heat dissipation composite layer by a pull rope. After the pull ropes at the four corners of the top of the static pressure suspension unit are locked by a rope clamp, the offset of the magnetic sensor is only formed by the deformation of the static pressure suspension unit. The static pressure suspension unit is filled with dry high-purity nitrogen. Therefore, when the static pressure suspension unit is deformed, the gas gap on that side decreases, the pressure increases, and a reverse thrust is generated to restore the static pressure suspension unit, thereby pushing the magnetic sensor back to the center and improving the positive positioning performance of the magnetic sensor.

[0021] (8) A protective installation device for built-in magnetic sensing metering in an electricity meter, wherein the static pressure suspension unit is connected to the pump base through the pump cylinder for a long time, and the pump keeps the internal pressure of the static pressure suspension unit constant, so that the static pressure suspension unit accurately wraps the magnetic sensor inside, which can protect the magnetic sensor while avoiding tearing effect on the magnetic sensor, thereby improving the measurement accuracy.

[0022] (9) An electric energy meter with built-in magnetic sensing metering protection installation device, wherein the pump and the pump base are connected by a pump pipe, and the pump pipe passes through the cold chamber. Therefore, when the internal pressure of the static pressure suspension unit is adjusted by the pump, nitrogen gas cooled by the cold chamber can always be introduced. At the same time, the cooled nitrogen gas wraps the magnetic sensor through the static pressure suspension unit, thus further improving the cooling and heat exchange effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a bottom view of the structure of the present invention; Figure 3 This is a schematic diagram showing the location of the non-magnetic air levitation system of the present invention; Figure 4 This is a schematic diagram of the internal structure of the non-magnetic air levitation system of the present invention; Figure 5 This is a schematic diagram showing the location of the internal conductive heat dissipation composite layer of the present invention; Figure 6 This is a schematic diagram of the internal conductive heat dissipation composite layer of the present invention; Figure 7 This is a schematic diagram of the convection cooling system of the present invention; Figure 8 This is a schematic diagram of the high permeability layer in this invention; Figure 9 This is a schematic diagram of the external reinforcing magnetic layer of the present invention; Figure 10 This is a schematic diagram of the heat transfer rod of the present invention; Figure 11 This is a schematic diagram of the internal structure of the magnetic shielding component of the present invention.

[0024] In the picture: 1. Internal conductive heat dissipation composite layer; 101. First stepped edge; 102. Spherical groove; 2. Medium to high permeability layer; 201. Bottom compartment; 202. Top cover; 203. Wire hole; 204. Pump hole; 205. Air hole; 206. Block groove; 3. External reinforcing magnetic layer; 301. Top compartment; 302. Bottom cover; 303. Support column; 304. Cold compartment; 305. Cold block; 306. Heat transfer rod; 307. Fastener; 308. Wire seat; 309. Pump base; 310. Pump pipe; 311. Pump; 4. First air gap layer; 5. Second air gap layer; 6. Convection cooling system; 601. Sphere; 602. Fin; 603. Vibration block; 604. Heat-conducting column; 605. Heat-conducting bridge; 606. Elastic sheet; 607. Elastic pad; 7. Non-magnetic air levitation system; 701. Static pressure levitation unit; 702. Buffer structure; 703. String cylinder; 704. Pump cylinder; 705. Pull rope; 706. String clamp. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example: Please refer to Figures 1-11 A built-in magnetic sensing metering protection installation device for an electricity meter includes a magnetic shielding component, a convection heat dissipation system 6, a non-magnetic air levitation system 7, a snap-fit ​​component, a temperature compensation component, and a magnetic detection component. The magnetic shielding assembly adopts a stepped nested structure, which includes an inner conductive heat dissipation composite layer 1, a medium-high magnetic permeability layer 2, and an outer reinforcing magnetic permeability layer 3 from the inside to the outside. A first air gap layer 4 is formed between the inner conductive heat dissipation composite layer 1 and the medium-high magnetic permeability layer 2, and a second air gap layer 5 is formed between the medium-high magnetic permeability layer 2 and the outer reinforcing magnetic permeability layer 3. The edges of each layer form a stepped nested labyrinth magnetic circuit. The lower opening edge of the inner conductive heat dissipation composite layer 1 is bent outward at a 90-degree angle to form the first stepped edge 101; The medium-high permeability layer 2 is adapted to be connected to the internal conductive heat dissipation composite layer 1; the medium-high permeability layer 2 adopts a double-layer permalloy cross-stacked structure; the medium-high permeability layer 2 includes a bottom compartment 201 and a top cover 202 that are interlocked; the top cover 202 and the first step edge 101 are misaligned and overlapped; The outer reinforcing magnetic layer 3 is adapted to be connected to the medium-high permeability layer 2; the outer reinforcing magnetic layer 3 is made of silicon steel; the outer reinforcing magnetic layer 3 includes a top compartment 301 and a bottom cover 302 that are interlocked; the bottom cover 302 and the medium-high permeability layer 2 are misaligned and overlapped; The convection cooling system 6 adopts an active oscillating structure, which is integrated on the inner conductive heat dissipation composite layer 1 and is driven by power frequency electromagnetic resonance. The non-magnetic air levitation system 7 is set in the inner conductive heat dissipation composite layer 1 of the magnetic shielding component, realizing the omnidirectional non-magnetic and non-rigid contact levitation of the magnetic sensor. The snap-fit ​​assembly is located at the bottom of the magnetic shielding assembly and is used to mount the PCB substrate; the temperature compensation assembly and the magnetic detection assembly are integrated on the PCB substrate at the bottom of the magnetic shielding assembly.

[0027] The inner conductive heat dissipation composite layer 1 has a spherical groove 102 uniformly extending through its sidewall.

[0028] The convection cooling system 6 includes a sphere 601 adapted to the movable insert ball groove 102; a swingable fin 602 is fixedly connected to the inner side of the sphere 601, and a swingable heat-conducting bridge 605 is provided on the outer side of the sphere 601. A vibrating block 603 is integrated on the fin 602, and the vibrating block 603 is made of non-magnetic copper material; A heat-conducting column 604 is fixedly connected between the middle of the heat-conducting bridge 605 and the sphere 601; elastic components are provided between the two ends of the heat-conducting bridge 605 and the inner conductive heat dissipation composite layer 1. The elastic component includes an elastic sheet 606 and an elastic pad 607 connected to each other. The elastic sheet 606 is fixedly connected to a thermal bridge 605, and the elastic pad 607 is fixedly connected to an inner conductive heat dissipation composite layer 1. The convection cooling system 6 achieves energy-efficient active convection cooling through a composite drive of elastic components.

[0029] The bottom wall of the bottom compartment 201 is provided with intersecting wire holes 203 and pump holes 204 evenly spaced through the middle. The top wall edge of the top cover 202 is provided with air holes 205 evenly spaced; the top wall of the top cover 202 is provided with a block groove 206 through the middle.

[0030] The sidewall of the top compartment 301 is evenly and equidistantly inserted with support columns 303 that fit the bottom compartment 201; one end of the support column 303 is inside the second air gap layer 5 and the other end is outside the outer reinforcing magnetic layer 3. A cold storage compartment 304 is inserted through the middle of the top wall of the top compartment 301, and the cold storage compartment 304 presses against the top cover 202; the air hole 205 connects the first air gap layer 4 and the cold storage compartment 304. A cold block 305 is inserted through the middle of the top wall of the cold compartment 304. The lower end of the cold block 305 is adapted to the through slot 206 and fits the top wall of the inner conductive heat dissipation composite layer 1. The top of the cold block 305 is connected to the refrigerator. A heat transfer rod 306 is fixedly connected between the bottom corner of the cold storage 304 and the bottom corner of the top storage 301, and the heat transfer rod 306 is located in the second air gap layer 5.

[0031] The bottom wall of the bottom cover 302 is inserted through the middle of the bottom wall and the buckle 307 is adapted to connect to the top compartment 301. The buckle 307 is adapted to support the bottom compartment 201. The center of the fastener 307 is evenly and equidistantly inserted with intersecting wire seats 308 and pump seats 309; Cable holder 308 is adapted to insert cable hole 203; pump holder 309 is adapted to insert pump hole 204; The lower end of the pump base 309 is connected to the pump pipe 310, which passes through the cold compartment 304 and is connected to the pump 311.

[0032] The non-magnetic air levitation system 7 includes a static pressure levitation unit 701 with an upper opening, and the static pressure levitation unit 701 adopts a double-layer elastic membrane bladder structure. A buffer structure 702 is fixedly connected at equal intervals within the static pressure suspension unit 701; The bottom wall of the static pressure suspension unit 701 is evenly and equidistantly penetrated by the wire drum 703, which is inserted into the corresponding wire seat 308, and the wire drum 703 penetrates the double membrane bladder. The bottom wall of the static pressure suspension unit 701 is evenly and equidistantly inserted into the pump cylinder 704 of the inherent sleeve pump seat 309, and the pump cylinder 704 penetrates the outer membrane bladder. A pull rope 705 is fixedly connected to the top corner of the static pressure suspension unit 701. The pull rope 705 passes through the top corner of the inner conductive heat dissipation composite layer 1 and is equipped with a rope clamp 706. The static pressure suspension unit 701 is filled with dry high-purity nitrogen gas; the magnetic sensor is inserted through the upper opening of the static pressure suspension unit 701.

[0033] The working principle of this invention is as follows: The convection heat dissipation system 6 adopts an active oscillating structure and is integrated on the inner conductive heat dissipation composite layer 1. The convection heat dissipation system 6 can actively cut the air boundary layer and completely destroy the thick laminar flow boundary formed by static natural convection, thereby increasing the air convection heat transfer coefficient inside the inner conductive heat dissipation composite layer 1, improving the heat transfer efficiency of natural convection in the closed space of the energy meter, reducing the heat accumulation of the magnetic sensor during long-term operation, reducing the maximum temperature rise on the surface of the magnetic sensor, improving the temperature field uniformity, reducing the impact of temperature drift on metering accuracy, and improving heat dissipation performance.

[0034] The convection cooling system 6 adopts the power frequency electromagnetic resonance drive principle, directly using the inherent power frequency magnetic field vibration energy generated by the current-carrying conductor during the metering process of the electricity meter as the power source. No additional power supply and battery are required, enabling the convection cooling system 6 to achieve low energy consumption operation and improve low energy consumption and green environmental protection.

[0035] When current flows through the current-carrying conductor, the resulting vibration excites the fin 602 to resonate. A vibration block 603 is integrated on the fin 602 to increase its weight and make the fin 602 swing more noticeably. At the same time, elastic components are provided between the two ends of the thermal bridge 605 and the inner conductive heat dissipation composite layer 1. When the fin 602 swings, the elastic sheet 606 of one end of the elastic component is compressed, and the elastic sheet 606 of the other end of the elastic component is pulled. Through the restorative properties of the elastic sheet 606, the swing time of the convection heat dissipation system 6 is extended, further improving the sustainability of heat dissipation.

[0036] The magnetic shielding assembly adopts a stepped nested structure, consisting of an inner conductive heat dissipation composite layer 1, a medium-high magnetic permeability layer 2, and an outer reinforcing magnetic permeability layer 3 from the inside out. The outer reinforcing magnetic permeability layer 3 is nested on top of the medium-high magnetic permeability layer 2, and the medium-high magnetic permeability layer 2 is nested on the bottom of the inner conductive heat dissipation composite layer 1. The edges of each layer form a stepped nested labyrinth magnetic circuit. The edges of the inner conductive heat dissipation composite layer 1, the medium-high magnetic permeability layer 2, and the outer reinforcing magnetic permeability layer 3 mutually constrain and tightly interlock, cutting off the edge leakage magnetic path, reducing the overall edge leakage magnetic amount, improving the side shielding effectiveness, eliminating the magnetic field protection blind zone in all directions, greatly enhancing the device's ability to resist strong magnet power theft, and significantly improving the edge leakage magnetic blocking effect.

[0037] A second air gap layer 5 is formed between the medium-high permeability layer 2 and the outer reinforcing magnetic layer 3. The medium-high permeability layer 2 and the outer reinforcing magnetic layer 3 are supported by a support column 303. The support column 303 forms a uniform air gap in the second air gap layer 5, which not only constructs an independent heat dissipation convection channel to guide the internal heat to be quickly conducted outward, thus improving the temperature uniformity around the magnetic sensor, but also enhances the overall rigidity and impact resistance of the magnetic shielding component through multi-point support, improves the protection level of the device against external impact and crushing damage, and extends its service life; thus, it optimizes both heat dissipation and structural strength.

[0038] The magnetic shielding assembly adopts a stepped nested structure. The heat inside the inner conductive heat dissipation composite layer 1 is mostly transferred to the first air gap layer 4 through the convection heat dissipation system 6. The hot air rises, and the top of the cold block 305 connects to the refrigerator. On the one hand, the cold block 305 directly cools the top wall of the inner conductive heat dissipation composite layer 1 by adhering to it. On the other hand, the cold block 305 cools the air in the cold chamber 304. The cold air falls and exchanges heat with the hot air in the first air gap layer 4 through the air holes 205. At the same time, the support column 303 and heat transfer rod 306 in the second air gap layer 5 continue to assist in heat exchange, further enhancing the heat dissipation effect.

[0039] The non-magnetic air levitation system 7 is set inside the inner conductive heat dissipation composite layer 1 of the magnetic shielding component. The magnetic sensor is inserted through the upper opening of the static pressure levitation unit 701. The static pressure levitation unit 701 is suspended in the inner conductive heat dissipation composite layer 1 by the pull ropes 705. After the pull ropes 705 at the four corners of the top of the static pressure levitation unit 701 are locked by the rope clamps 706, the offset of the magnetic sensor is only formed by the deformation of the static pressure levitation unit 701. The static pressure levitation unit 701 is filled with dry high-purity nitrogen. Therefore, when the static pressure levitation unit 701 deforms, the gas gap on that side decreases, the pressure increases, and a reverse thrust is generated to restore the static pressure levitation unit 701, thereby pushing the magnetic sensor back to the center and improving the alignment performance of the magnetic sensor.

[0040] The static pressure suspension unit 701 is connected to the pump base 309 through the pump cylinder 704 for a long time. The pump 311 keeps the internal pressure of the static pressure suspension unit 701 constant, so that the static pressure suspension unit 701 can accurately wrap the magnetic sensor inside. This can protect the magnetic sensor and avoid tearing it, thereby improving the measurement accuracy.

[0041] Pump pipe 310 is connected between pump 311 and pump base 309, and pump pipe 310 passes through cold chamber 304. Therefore, when the internal pressure of static pressure suspension unit 701 is adjusted by pump 311, nitrogen gas cooled by cold chamber 304 can always be introduced. At the same time, the cooled nitrogen gas wraps around the magnetic sensor through static pressure suspension unit 701, thus further improving the cooling and heat exchange effect.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An energy meter built-in magnetic sensing metering protection installation device, comprising a magnetic shielding component, a convection heat dissipation system (6), a non-magnetic air levitation system (7), a snap-fit ​​component, a temperature compensation component, and a magnetic detection component; Its features are: The magnetic shielding assembly adopts a stepped nested structure, which includes an inner conductive heat dissipation composite layer (1), a medium-high magnetic permeability layer (2), and an outer reinforced magnetic permeability layer (3) from the inside to the outside. A first air gap layer (4) is formed between the inner conductive heat dissipation composite layer (1) and the medium-high magnetic permeability layer (2), and a second air gap layer (5) is formed between the medium-high magnetic permeability layer (2) and the outer reinforced magnetic permeability layer (3). A stepped nested labyrinth magnetic circuit is formed at the edges of each layer. The lower opening edge of the inner conductive heat dissipation composite layer (1) is bent outward at ninety degrees to form the first stepped edge (101). The medium-high permeability layer (2) is adapted to be connected to the internal conductive heat dissipation composite layer (1); the medium-high permeability layer (2) includes a bottom compartment (201) and a top cover (202) that interlock with each other; the top cover (202) and the first stepped edge (101) are misaligned and overlapped; The external reinforcing magnetic layer (3) is adapted to be connected to the medium-high permeability layer (2); the external reinforcing magnetic layer (3) includes a top compartment (301) and a bottom cover (302) that interlock with each other; the bottom cover (302) and the medium-high permeability layer (2) are misaligned and overlapped; The convection heat dissipation system (6) adopts an active swing structure and is integrated on the inner conductive heat dissipation composite layer (1); The non-magnetic air-float suspension system (7) is set inside the inner conductive heat dissipation composite layer (1) of the magnetic shielding component to realize the omnidirectional non-magnetic and non-rigid contact suspension of the magnetic sensor; The snap-fit ​​assembly is located at the bottom of the magnetic shielding assembly and is used to mount the PCB substrate; the temperature compensation assembly and the magnetic detection assembly are integrated on the PCB substrate at the bottom of the magnetic shielding assembly.

2. The built-in magnetic sensing metering protection installation device for an electricity meter according to claim 1, characterized in that: The inner conductive heat dissipation composite layer (1) has a spherical groove (102) uniformly opened through its sidewall.

3. The built-in magnetic sensing metering protection installation device for an electricity meter according to claim 2, characterized in that: The convection cooling system (6) includes a sphere (601) adapted to the movable insert ball groove (102); the inner side of the sphere (601) is fixedly connected with a swingable fin (602), and the outer side of the sphere (601) is provided with a swingable heat-conducting bridge (605). Vibration blocks (603) are integrated on the fin (602); A heat-conducting column (604) is fixedly connected between the middle of the heat-conducting bridge (605) and the sphere (601); an elastic component is provided between the two ends of the heat-conducting bridge (605) and the inner conductive heat dissipation composite layer (1); The elastic component includes an elastic sheet (606) and an elastic pad (607) connected to each other. The elastic sheet (606) is fixedly connected to a thermal bridge (605), and the elastic pad (607) is fixedly connected to an inner conductive heat dissipation composite layer (1). The convection cooling system (6) is driven by a composite of elastic components.

4. The built-in magnetic sensing metering protection installation device for an electricity meter according to claim 1, characterized in that: The bottom wall of the bottom compartment (201) is provided with intersecting wire holes (203) and pump holes (204) evenly spaced through the middle. The top wall edge of the top cover (202) is provided with air holes (205) evenly spaced; the top wall of the top cover (202) is provided with a block groove (206) through the middle.

5. The built-in magnetic sensing metering protection installation device for an electricity meter according to claim 4, characterized in that: The sidewall of the top compartment (301) is evenly and equidistantly inserted with the support columns (303) that fit the bottom compartment (201); one end of the support column (303) is inside the second air gap layer (5) and the other end is outside the outer reinforcing magnetic layer (3); The top wall of the top compartment (301) is penetrated by a cold compartment (304), which holds the top cover (202); the air hole (205) connects the first air gap layer (4) and the cold compartment (304). The cold storage (304) has a cold block (305) inserted through the middle of the top wall. The lower end of the cold block (305) is adapted to the through slot (206) and fits the top wall of the inner conductive heat dissipation composite layer (1). The top of the cold block (305) is connected to the refrigerator. A heat transfer rod (306) is fixedly connected between the bottom corner of the cold compartment (304) and the bottom corner of the top compartment (301), and the heat transfer rod (306) is located in the second air gap layer (5).

6. The built-in magnetic sensing metering protection installation device for an electricity meter according to claim 5, characterized in that: The bottom wall of the bottom cover (302) has a buckle (307) that is adapted to connect to the top compartment (301) through the middle of the bottom wall, and the buckle (307) is adapted to support the bottom compartment (201). The buckle (307) has interlocking wire seats (308) and pump seats (309) inserted evenly and at equal intervals in the middle. The wire socket (308) is adapted to the wire insertion hole (203); the pump socket (309) is adapted to the pump insertion hole (204). The lower end of the pump base (309) is connected to the pump pipe (310), which passes through the cold compartment (304) and is connected to the pump (311).

7. The built-in magnetic sensing metering protection installation device for an electricity meter according to claim 6, characterized in that: The non-magnetic air levitation system (7) includes a static pressure levitation unit (701) with an upper opening, and the static pressure levitation unit (701) adopts a double-layer elastic membrane structure; The static pressure suspension unit (701) is fixedly connected with buffer structures (702) at equal intervals and uniformly. The bottom wall of the static pressure suspension unit (701) is uniformly and evenly perforated by the bobbins (703) that are inserted into the corresponding bobbins (308), and the bobbins (703) penetrate the double membrane bladder. The bottom wall of the static pressure suspension unit (701) is evenly and equidistantly inserted into the pump cylinder (704) of the inherent sleeve pump seat (309), and the pump cylinder (704) penetrates the outer membrane bladder. The top corner of the static pressure suspension unit (701) is fixedly connected to a pull rope (705), which passes through the top corner of the inner conductive heat dissipation composite layer (1) and is equipped with a rope clamp (706). The static pressure suspension unit (701) is filled with dry high-purity nitrogen.

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