Large-current relay integrated electric energy meter for two-way metering of tidal current

Abstract

The invention relates to a large-current relay integrated electric energy meter for tidal current bidirectional metering, and relates to the technical field of electric energy meters. Comprising a first circuit board and a second circuit board, a high-power relay is welded on the second circuit board, an electromagnetic isolation layer for isolating electromagnetism and heat is arranged between the second circuit board and the first circuit board, and a heat dissipation device is arranged on the high-power relay; the electric energy meter can actively adjust the power of the relay, the heat dissipation device can actively carry out heat dissipation treatment on the relay, the adjustment of the power of the relay and the heat dissipation performance of the heat dissipation device can be linked, the larger the power of the relay is, the higher the heat dissipation performance of the heat dissipation device is, and otherwise, the smaller the power is, the heat dissipation performance is general. The heat dissipation performance of the electric energy meter in hot weather and the heat preservation performance of the electric energy meter in cold weather are guaranteed, the situation that internal electronic components decline due to large internal temperature difference of the electric energy meter is avoided, and the service life of the internal electronic components of the electric energy meter is indirectly prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy meters, and particularly to a large-current relay integrated electric energy meter for bidirectional power flow metering. Background Art

[0002] A large-current relay integrated electric energy meter for bidirectional power flow metering is an intelligent electric energy meter that combines the functions of bidirectional power flow metering and large-current relay technology, and can measure forward active electric energy, reverse active electric energy, forward reactive electric energy, and reverse reactive electric energy simultaneously. It is widely used in distributed photovoltaic systems, energy storage systems, microgrids, and new energy power generation fields.

[0003] For example, a Chinese patent with the publication number CN118937756A discloses an electric energy meter, which relates to the technical field of low-voltage electrical appliances. The electric energy meter includes a bottom case, a meter cover, and an anti-tampering buckle. The bottom case is provided with at least one clamping post, and at least one clamping claw is provided at the end of the clamping post; the meter cover is detachably connected to the bottom case, and at least one clamping hole is provided on the meter cover; the anti-tampering buckle is filled into the clamping hole, and a locking structure is provided on the side of the anti-tampering buckle facing the bottom case. A clamping edge is provided on the side of the clamping hole close to the bottom case, and the clamping claw can be clamped to the clamping edge. After the anti-tampering buckle is installed in the clamping hole, the locking structure limits the clamping claw and maintains the clamping claw and the clamping edge in a clamped state. It can increase the difficulty of disassembly, improve the safety of the electric energy meter, and replace existing fixing parts such as screws, thereby improving the assembly efficiency of the meter cover.

[0004] However, there are still some deficiencies in the above electric energy meter during actual use: 1. First of all, in the prior art, high-power relays in electric energy meters are prone to generate high temperatures due to frequent on-off of high currents, and existing ordinary heat sinks are difficult to quickly conduct local high temperatures, and the interior of the electric energy meter is compact and large-volume radiators cannot be installed; resulting in temperature runaway after long-term use of the equipment.

[0005] 2. Secondly, in the prior art, high-power relays are provided inside the electric energy meter, which are prone to generate electromagnetic interference, and existing high-power relays have a constant power, resulting in poor applicability of the electric energy meter.

[0006] Therefore, in view of the above statements, there is still room for improvement in existing electric energy meters. Summary of the Invention

[0007] In order to solve the above problems, the present invention provides a large-current relay integrated electric energy meter for bidirectional power flow metering, adopting the following technical solutions: A large-current relay integrated energy meter for two-way measurement of tidal current includes a housing and an inner shell assembled with each other. A metering cavity is formed between the housing and the inner shell. A first circuit board is also provided in the metering cavity formed by the housing and the inner shell. A second circuit board is provided on one side of the first circuit board. A high-power relay is welded on the second circuit board. A metering module is provided on the first circuit board. The high-power relay is vertically integrated with the metering module.

[0008] An electromagnetic isolation layer for isolating electromagnetic and heat is provided between the second circuit board and the first circuit board. The electromagnetic isolation layer is of a corrugated structure. A heat dissipation device is provided on the high-power relay.

[0009] The heat dissipation device includes heat-conducting copper tubes laid at equal intervals along the length direction on the second circuit board. A heat dissipation fin is commonly provided on one side of the heat-conducting copper tubes. The heat dissipation fin is attached to the side wall of the housing. And a heat dissipation opening for the heat dissipation fin to dissipate heat is opened on the side wall of the housing.

[0010] Preferably, the high-power relay is composed of a number of small relays of the same model. The number of small relays are installed on the second circuit board at equal intervals through their own pins.

[0011] Preferably, two conductive rods are symmetrically provided on the second circuit board in the width direction. Sliding conductive sheets are respectively installed on the two conductive rods along the vertical direction through wires. An auxiliary bracket for assisting its movement and being insulated is installed on the conductive sheet. The auxiliary bracket is slidably provided on the second circuit board. A centering rod is installed between two auxiliary brackets on the same vertical straight line. The sides of the two centering rods close to each other are of a sawtooth structure. And a centering gear is engaged between the two centering rods. The centering gear is rotatably provided on the second circuit board.

[0012] A reset insulating spring is provided between the centering rod and the second circuit board.

[0013] Preferably, an adjusting screw rod and a limiting rod which are parallel to each other are rotatably connected to the inner wall of the housing. An adjusting block is commonly provided on the adjusting screw rod and the limiting rod. One side of the adjusting block is of an inclined plane structure. A linkage rod is installed on one centering rod. The linkage rod and the adjusting block are on the same plane.

[0014] Preferably, two fixing frames are symmetrically provided on the second circuit board in the length direction. A T-shaped sliding groove is opened on the fixing frame. A T-shaped block is slidably provided in the T-shaped sliding groove of the fixing frame. The heat-conducting copper tubes are horizontally provided on the T-shaped blocks on the same horizontal straight line of the two fixing frames. The distance between the several heat-conducting copper tubes is changed by adjusting the distance between the fixing frames.

[0015] Preferably, a return-shaped copper frame is installed on the back side of the heat dissipation fin. One end of the heat-conducting copper tube close to the heat dissipation fin is slidably provided inside the return-shaped copper frame. A number of heat dissipation exhaust fans are installed at equal intervals inside the return-shaped copper frame.

[0016] Preferably, a plurality of trapezoidal adjusting plates are slidably mounted on one side fixing frame. The side of the trapezoidal adjusting plate close to the T-shaped block is arranged as an inclined surface, and the inclined surface on one side of the trapezoidal adjusting plate abuts against the corner of the T-shaped block.

[0017] Preferably, a guiding column is installed in the T-shaped sliding groove of the fixing frame. The T-shaped block is slidably arranged on the guiding column, and a telescopic spring is arranged between the two outer T-shaped blocks on the guiding column and the inner wall of the fixing frame. The telescopic spring is sleeved on the guiding column.

[0018] Preferably, a linkage screw is further provided on the fixing frame. The trapezoidal adjusting plate is screwed on the linkage screw on the fixing frame. Linkage gears are installed on both the linkage screw and the adjusting screw, and a linkage toothed belt is sleeved on the linkage gears.

[0019] Preferably, an extension rod is further installed on the trapezoidal adjusting plate. An extension block is installed at one end of the extension rod away from the trapezoidal adjusting plate. A switch is installed on the heat dissipation exhaust fan. The switches are arranged at equal intervals along a straight line on the rectangular copper frame. A contact block is slidably arranged on each switch. A contact tension spring is connected between the contact block and the outer wall of the rectangular copper frame. The extension block and the contact block are on the same straight line. When the extension block moves, it squeezes the contact block, so that the contact block controls the opening and closing of the switch.

[0020] In summary, the present application includes at least one of the following beneficial technical effects: First, the electric energy meter of the present invention assembles the relay and the bidirectional metering module together in an integrated manner and arranges them in the electric energy meter. The relay and the metering module are vertically integrated, which significantly improves the space utilization rate, reduces the electromagnetic interference of the relay, and optimizes the heat conduction path between the modules, thereby improving the accuracy and effectiveness of reading the electric energy data of the electric energy meter.

[0021] Second, the relay of the present invention can actively adjust its power, enabling it to adapt to multiple different application scenarios. By adjusting the power of the relay, the applicability of the electric energy meter is improved, and the electric energy meter adjusts the power of the relay to correspond to each different power consumption scenario one by one, greatly improving the accuracy of reading the electric energy data and avoiding over-performance at the same time.

[0022] Third, the heat dissipation device of the present invention can actively dissipate heat from the relay, so that the temperature inside the electric energy meter can be kept within a reasonable range, avoiding the entire electric energy meter from getting stuck or its performance being damaged due to excessive internal temperature. And the heat dissipation device of the present application can synchronously adjust its heat dissipation performance according to the power of the relay, so that its heat dissipation performance can better match the electric energy meter.

[0023] 4. The adjustment of the relay power size in the present invention is linked with the heat dissipation performance of the heat dissipation device. The greater the power of the relay, the stronger the heat dissipation performance of the heat dissipation device. Conversely, the smaller its power, the general heat dissipation performance. Through reasonable performance matching, the heat dissipation performance of the electricity meter in hot weather and the heat preservation performance of the electricity meter in cold weather are ensured, avoiding the frequent occurrence of large temperature differences inside the electricity meter, and indirectly improving the service life of the internal electronic components of the electricity meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the drawings and embodiments.

[0025] Figure 1 It is a schematic diagram of the main structure of the electricity meter of the present invention.

[0026] Figure 2 It is a schematic diagram of the structure between the outer shell and the inner shell of the electricity meter of the present invention.

[0027] Figure 3 It is a schematic diagram of the structure between the metering module, the electromagnetic isolation layer and the heat dissipation device on the first circuit board and the second circuit board of the present invention.

[0028] Figure 4 It is a schematic diagram of the structure of the high-power relay of the present invention.

[0029] Figure 5 It is a schematic diagram of the first perspective structure of the heat dissipation device of the present invention.

[0030] Figure 6 It is a schematic diagram of the first perspective structure of the control conductive sheet in contact with the pin of the present invention.

[0031] Figure 7 It is a schematic diagram of the second perspective structure of the control conductive sheet in contact with the pin of the present invention.

[0032] Figure 8 It is a schematic diagram of the second perspective structure of the heat dissipation device of the present invention.

[0033] Figure 9 It is a schematic diagram of the third perspective structure of the heat dissipation device of the present invention.

[0034] Figure 10 It is a schematic diagram of the structure between the fixing frame, the T-shaped chute, the T-shaped block, the guiding column and the telescopic spring of the present invention.

[0035] Figure 11 It is a schematic diagram of the first perspective structure of the heat conduction copper tube and the heat dissipation exhaust fan between two fixing frames of the present invention.

[0036] Figure 12 It is a schematic diagram of the second perspective structure of the heat conduction copper tube and the heat dissipation exhaust fan between two fixing frames of the present invention.

[0037] Figure 13 It is a schematic structural diagram among the extension rod, extension block, switch, abutting block and abutting tension spring of the present invention.

[0038] Explanation of reference numerals: 1, electric energy meter; 10, outer shell; 11, inner shell; 12, metering inner cavity; 2, first circuit board; 3, second circuit board; 4, high-power relay; 5, metering module; 6, electromagnetic isolation layer; 7, heat dissipation device; 40, small relay; 41, pin; 20, conductive rod; 21, conductive sheet; 22, auxiliary bracket; 23, centering rod; 24, centering gear; 25, reset insulating spring; 30, adjusting screw; 31, limiting rod; 32, adjusting block; 33, linkage rod; 70, heat-conducting copper tube; 71, heat dissipation fin; 72, fixing frame; 73, T-shaped sliding groove; 74, T-shaped block; 75, return-shaped copper frame; 76, heat dissipation exhaust fan; 77, trapezoidal adjusting plate; 79, guiding column; 80, telescopic spring; 81, linkage screw; 84, linkage gear; 85, linkage toothed belt; 90, extension rod; 91, extension block; 92, switch; 93, abutting block; 94, abutting tension spring. Specific embodiments

[0039] The following is combined with Figures 1-13 to further elaborate on the present application in detail.

[0040] The embodiment of the present application discloses a large-current relay integrated electric energy meter for bidirectional power flow metering, which is widely used in distributed photovoltaic systems, energy storage systems, microgrids and new energy power generation fields. However, there are still some deficiencies in the actual use of the existing electric energy meter 1: First of all, in the prior art, the high-power relay 4 in the electric energy meter 1 is prone to generate high temperature due to frequent on-off of high current, and the existing ordinary heat sinks are difficult to quickly export local high temperature, and the inside of the electric energy meter 1 is compact and large-volume radiators cannot be installed; resulting in temperature out of control after long-term use of the equipment. Secondly, in the prior art, a high-power relay 4 is arranged inside the electric energy meter 1, which is prone to generate electromagnetic interference, and the existing high-power relay 4 has a constant power, resulting in poor applicability of the electric energy meter 1.

[0041] Therefore, the present application proposes a large-current relay integrated electric energy meter for bidirectional power flow metering.

[0042] Embodiment 1: Refer to Figure 1As shown in the figure, it is a schematic diagram of the main structure of the electricity meter 1 in this application; a large-current relay integrated electricity meter for two-way power flow metering. Two-way power flow metering means that the electricity meter 1 can measure the power flow in both the forward and reverse directions. For example, when a distributed photovoltaic system generates electricity, the electricity meter 1 can record the electricity generated by the photovoltaic power generation (forward power), and at the same time, it can also record the electricity delivered to the power grid when there is excess electricity (reverse power). This function is crucial for the reasonable management and utilization of new energy power generation systems, can balance the power supply and demand of the power grid, and improve the energy utilization efficiency.

[0043] The large-current relay integrated electricity meter for two-way power flow metering not only supports the measurement of active and reactive electric energy, but also can record parameters such as voltage, current, and power factor. By adopting advanced digital sampling processing technology and SMT process, it ensures the high precision of data and the long-term stability of the equipment. It supports RS485 communication protocol or infrared communication, which is convenient for data transmission and remote monitoring. It is applicable to scenarios such as power systems, industrial and mining enterprises, distributed photovoltaic systems, and energy storage systems, and has important application value especially in new energy power generation and smart grids.

[0044] Refer to Figure 2 As shown in the figure, it includes a mutually assembled outer shell 10 and an inner shell 11. A metering inner cavity 12 is formed between the outer shell 10 and the inner shell 11. In the metering inner cavity 12 formed by the outer shell 10 and the inner shell 11, there is also a first circuit board 2 installed by bolts and nuts. On one side of the first circuit board 2, there is a second circuit board 3 for loading relays. A high-power relay 4 is welded on the second circuit board 3. A metering module 5 is provided on the first circuit board 2, and the high-power relay 4 and the metering module 5 are vertically integrated.

[0045] The outer shell 10 and the inner shell 11 are mutually assembled to form the housing of the electricity meter 1, which protects the electronic components inside the electricity meter 1.

[0046] It should be noted that the first circuit board 2 is provided with a known metering module 5, a central processing unit, a display unit, a communication unit, and an output unit.

[0047] Metering module 5: This is the core part of the electronic electricity meter 1 and is used to measure the electricity consumption. Its working principle includes voltage and current sampling, signal transformation, power calculation, etc. There are two types of specific implementation methods: analog multiplier and digital multiplier. The analog multiplier usually includes modules such as a triangular wave generator, a comparator, a modulator, and a filter; while the digital multiplier performs data processing through a DSP or a microprocessor. And the metering module 5 of this application is a two-way metering module.

[0048] Central Processing Unit (Single-chip Microcomputer): The single-chip microcomputer is the control core of the electronic energy meter 1. It is responsible for receiving data from the power measurement unit, performing calculations and logical judgments, and controlling the operation of other modules. For example, it can process voltage and current signals, calculate power consumption, and output pulse signals.

[0049] Display Unit: The display unit is used to display the readings of the energy meter 1. Common display methods include LED digital tubes and LCD liquid crystal displays. LCD displays are widely used because of their low power consumption and support for Chinese character display.

[0050] Output Unit: The output unit is responsible for outputting the measurement results of the energy meter 1 in the form of pulse signals or digital signals for communication with external devices (such as data acquisition systems). Common communication interfaces include RS-485, infrared communication, etc.

[0051] Communication Unit: The communication unit is used to implement remote data transmission and control functions. For example, it can exchange data with external devices through the RS-485 interface, or achieve remote meter reading through the carrier communication module.

[0052] Refer to Figure 2 and Figure 3 As shown, it is a schematic structural diagram of the electromagnetic isolation layer 6; an electromagnetic isolation layer 6 that isolates electromagnetic and heat is provided between the second circuit board 3 and the first circuit board 2. The electromagnetic isolation layer 6 is a corrugated structure, and a heat dissipation device 7 is provided on the high-power relay 4.

[0053] And these devices will generate a certain amount of heat during use. Among them, there is a very important electronic component, that is, the relay, especially the high-power relay 4. After it works, because the high-power relay 4 in the energy meter 1 is prone to generate high temperature due to frequent on-off of high current, especially during the process of power transmission during peak electricity consumption, so it needs to be quickly cooled.

[0054] Refer to Figure 4 As shown, it is a schematic structural diagram of the high-power relay 4 in this application; the high-power relay 4 is composed of several small relays 40 of the same model. The several small relays 40 are equidistantly installed on the second circuit board 3 through their own pins 41.

[0055] It should be noted that the high-power relay 4 in this application is composed of multiple small relays 40, and the multiple small relays 40 are arranged equidistantly on the second circuit board 3.

[0056] In specific implementation, when the electric energy meter 1 of the present application needs to be applied to different fields, such as in a microgrid, a relay with too high power is not required at this time. When the electric energy meter 1 of the present application is applied to a new energy system, a relay with very high power is required. At this time, the prior art needs to produce an electric energy meter 1 with corresponding power and install it in different fields it belongs to. This will greatly increase the production difficulty of the electric energy meter 1 and reduce its production efficiency. Therefore, the present application proposes a special electric energy meter 1 that can actively adjust the power of its internal relay so that it can be applied to different fields and increase the applicability of the electric energy meter 1.

[0057] Referring to Figure 5 、 Figure 6 and Figure 7 As shown, it is a schematic structural diagram of the adjustment of the high-power relay 4 in the present application; two conductive rods 20 are symmetrically arranged on the width direction of the second circuit board 3. Sliding conductive sheets 21 are respectively installed on the two conductive rods 20 along the vertical direction through wires. An auxiliary bracket 22 that assists its movement and is insulated is installed on the conductive sheet 21. The auxiliary bracket 22 is slidably arranged on the second circuit board 3. A centering rod 23 is installed between the two auxiliary brackets 22 on the same vertical line. One side of the two centering rods 23 close to each other is a serrated structure, and a centering gear 24 is engaged between the two centering rods 23. The centering gear 24 is rotatably arranged on the second circuit board 3.

[0058] A reset insulating spring 25 is provided between the centering rod 23 and the second circuit board 3.

[0059] One end of the conductive rod 20 is provided with a plurality of conductive sheets 21 installed at equal intervals, and the other side of the conductive rod 20 is connected to the entire metering module 5 through a wire, so that the metering module 5 can read various parameter indicators of the relay connected to the conductive rod 20.

[0060] In the initial state, four groups of relays are arranged inside the housing 10 of the electric energy meter 1. In the initial state, one group of relays is connected to the entire circuit of the conductive rod 20, while the other three groups of relays are in an open state and are not connected to the circuit of the conductive rod 20.

[0061] According to the scenario where the electric energy meter 1 is used, when it is necessary to adjust the power of the relay, the control adjusting screw 30 can be used, which is specifically as follows: Looking again at Figure 7 As shown, the inner wall of the housing 10 is rotatably connected with a mutually parallel adjusting screw 30 and a limiting rod 31. An adjusting block 32 is jointly arranged on the adjusting screw 30 and the limiting rod 31. One side of the adjusting block 32 is a slope structure, and a linkage rod 33 is installed on one side of the centering rod 23. The linkage rod 33 and the adjusting block 32 are on the same plane.

[0062] In the initial state, the handle position of the adjusting screw 30 is engraved with scales, and the upper ends are respectively engraved with markings corresponding to the power.

[0063] Secondly, three sets of adjusting blocks 32 are provided on the adjusting screw 30. The three sets of adjusting blocks 32 gradually become longer along the length direction of the adjusting screw 30, and the distances between the three sets of adjusting blocks 32 and the corresponding three linkage rods 33 gradually become smaller.

[0064] During specific implementation, when the adjusting screw 30 is rotated clockwise, the adjusting screw 30 drives the three adjusting blocks 32 arranged at its upper end to approach the corresponding linkage rods 33 synchronously. At this time, the first adjusting block 32 first contacts the corresponding first linkage rod 33. Therefore, the first linkage rod 33 is squeezed by the first adjusting block 32, causing it to control the middle rod 23 connected to it to move downward. At this time, the downward-moving middle rod 23 drives the other middle rods 23 to move upward synchronously under the linkage of the middle gear 24. One of the two middle rods 23 moves upward and the other moves downward, and both simultaneously control the two conductive sheets 21 connected correspondingly to move toward the pin 41 of the relay until the two conductive sheets 21 abut against the pin 41 of the relay. At this time, the corresponding small relay 40 is connected in series with the circuit of the entire conductive rod 20.

[0065] Continuing to rotate the adjusting screw 30 will drive the second adjusting block 32 to squeeze the second linkage rod 33, and then repeat the above operation to connect the second relay on the second circuit board 3 in series to the circuit of the conductive rod 20, and so on, so that multiple small relays 40 are connected in series in the circuit with the conductive rod 20. At this time, a high-power relay 4 with a large current is formed in the entire circuit.

[0066] After the high-power relay 4 is adjusted, the entire electricity meter 1 can be connected to the entire circuit. As the electricity meter 1 is used, the high-power relay 4 will generate a large amount of heat. If it cannot be dissipated in time, it will cause the temperature inside the electricity meter 1 to be too high. At this time, the electronic components soldered on the first circuit board 2 and the second circuit board 3 inside the electricity meter 1 will self-protect due to the high temperature, resulting in a decline in the performance of the entire device. Moreover, the alternating use and shutdown of the electricity meter 1 will cause a large temperature difference inside it. Therefore, the internal colloid will be in an environment with a large temperature difference for a long time, affecting the service life of the internal colloid and resulting in cracking and other situations.

[0067] Therefore, the present application proposes a heat dissipation device 7 to dissipate heat from it.

[0068] Refer to Figure 8 and Figure 9As shown, the heat dissipation device 7 includes heat conduction copper tubes 70 laid at equal intervals along the length direction on the second circuit board 3. A heat dissipation fin 71 is commonly provided on one side of the heat conduction copper tubes 70. The heat dissipation fin 71 is attached to the side wall of the housing 10, and a heat dissipation opening for the heat dissipation fin 71 to dissipate heat is provided on the side wall of the housing 10.

[0069] Specifically, the heat conduction copper tubes 70 are arranged at equal intervals on the surface of the second circuit board 3, and there are also several heat conduction copper tubes 70 abutted on the small relays 40. When the small relays 40 are operating, a large amount of heat will be generated. At this time, the heat conduction copper tubes 70 will conduct out the heat, so that the heat is guided along the heat conduction copper tubes 70 to the heat dissipation fins 71, and then the heat dissipation fins 71 will perform heat dissipation treatment.

[0070] However, it should be noted that the small relays 40 of this application adjust their power according to the installation environment; when there is only one or two small relays 40 connected to the internal circuit of the electricity meter 1, the heat dissipation performance of the heat conduction copper tubes 70 also needs to be adjusted adaptively. There is no need for very strong heat dissipation performance, because strong heat dissipation performance will also cause the temperature of the entire electricity meter 1 to be too low when used in winter due to too fast heat dissipation inside, which will also affect the normal use of the electricity meter 1. Therefore, the heat conduction copper tubes 70 of this application can adjust the spacing.

[0071] Refer to Figure 10 and Figure 11 As shown, two fixing frames 72 are symmetrically arranged along the length direction of the second circuit board 3. A T-shaped sliding groove 73 is provided on the fixing frame 72. A T-shaped block 74 is slidably arranged in the T-shaped sliding groove 73 of the fixing frame 72. The heat conduction copper tubes 70 are horizontally arranged on the T-shaped blocks 74 on the same horizontal straight line of the two fixing frames 72. The spacing between the heat conduction copper tubes 70 is changed by adjusting the spacing between the fixing frames 72.

[0072] It should be noted that the heat conduction copper tubes 70 are arranged on the two T-shaped blocks 74, and the T-shaped blocks 74 are slidably arranged in the T-shaped sliding grooves 73 of the fixing frames 72 to ensure that the T-shaped blocks 74 can slide.

[0073] When only one or two small relays 40 are arranged in the high-power relay 4 and connected to the circuit with the conductive rod 20, the spacing between the heat conduction copper tubes 70 is relatively large at this time. At this time, the position of the heat conduction copper tubes 70 can ensure that the heat generated when a small number of small relays 40 work can be discharged in time, ensuring the temperature stability of the small relays 40.

[0074] When multiple or all of the small relays 40 in the high-power relay 4 are connected to the circuit of the conductive rod 20, the distance between the heat-conducting copper tubes 70 is small at this time, the heat-conducting copper tubes 70 are precisely arranged, and the bottom of the heat-conducting copper tubes 70 is in full contact with all the small relays 40, ensuring that the heat can be timely attracted by the heat-conducting copper tubes 70 and discharged through the heat-dissipating fins 71.

[0075] Look back Figure 8 and Figure 9 As shown, it is a schematic structural diagram of the heat-dissipating fin 71; the heat-dissipating fin 71 is inserted and installed on the side wall of the housing 10, a return-shaped copper frame 75 is installed on the back side of the heat-dissipating fin 71, one end of the heat-conducting copper tube 70 close to the heat-dissipating fin 71 is slidably arranged inside the return-shaped copper frame 75, and a number of heat-dissipating exhaust fans 76 are installed at equal intervals inside the return-shaped copper frame 75.

[0076] During specific implementation, when the heat-conducting copper tube 70 attracts the heat generated by the small relay 40, the heat-dissipating exhaust fan 76 will also start. The heat-dissipating exhaust fan 76 quickly extracts the heat of the heat-conducting copper tube 70 and discharges it through the mesh holes on the heat-dissipating fin 71. At the same time, the heat-dissipating fin 71 will also absorb the heat and discharge the heat through its own fins, ensuring the heat dissipation efficiency through two methods.

[0077] Furthermore, when the heat-conducting copper tube 70 can adjust the heat dissipation performance by adjusting the distance, the heat-dissipating exhaust fan 76 can also adjust the air volume following the heat-conducting copper tube 70. Specifically as follows: Refer to Figure 11 、 Figure 12 and Figure 13 As shown, an extension rod 90 is also installed on the trapezoidal adjusting plate 77. One end of the extension rod 90 away from the trapezoidal adjusting plate 77 is installed with an extension block 91. A switch 92 is installed on the heat-dissipating exhaust fan 76. The switches 92 are arranged at equal intervals along a straight line in the inner wall of the housing 10. A contact block 93 is slidably arranged on each switch 92. A contact tension spring 94 is connected between the contact block 93 and the inner wall of the housing 10. The extension block 91 and the contact block 93 are on the same straight line. When the extension block 91 moves, it squeezes the contact block 93, so that the contact block 93 controls the opening and closing of the switch 92.

[0078] In the initial state, three groups of heat-dissipating exhaust fans 76 are arranged in the return-shaped copper frame 75. The three groups of heat-dissipating exhaust fans 76 are connected to a switch 92 through wires; it should be noted that the heat-dissipating exhaust fan 76 is powered on after the switch 92 is pressed, and if the switch 92 is not pressed, the heat-dissipating exhaust fan 76 is powered off.

[0079] During specific implementation, in the initial state, the extension block 91 is away from the three groups of resistance blocks 93. When the power of the small relay 40 is relatively small, the trapezoidal adjustment plate 77 approaches the heat-conducting copper tube 70, and the trapezoidal adjustment plate 77 squeezes the heat-conducting copper tube 70, so that the distance between the heat-conducting copper tubes 70 becomes larger. At this time, the trapezoidal adjustment plate 77 drives the extension block 91 away from the resistance block 93 through the extension rod 90, so that the extension block 91 only squeezes one or two resistance blocks 93 of the three groups of resistance blocks 93. After the resistance block 93 is squeezed, the resistance block 93 presses the switch 92, so that the corresponding heat dissipation fan 76 is energized. At this time, the heat dissipation performance of the heat dissipation fan 76 corresponds to the heat dissipation performance of the heat-conducting copper tube 70.

[0080] When all the small relays 40 are connected in series in the circuit of the electric energy meter 1, the trapezoidal adjustment plate 77 is away from the heat-conducting copper tube 70. At this time, the spacing between the heat-conducting copper tubes 70 is small, and the heat-conducting copper tubes 70 are closely arranged. At this time, the extension block 91 on the extension rod 90 will squeeze all three groups of resistance blocks 93 in the circular copper frame 75, and the three groups of resistance blocks 93 will also press the three switches 92, so that the three groups of heat dissipation fans 76 are all powered on. At this time, the heat dissipation performance of the heat dissipation fans 76 corresponds to the heat dissipation performance of the heat-conducting copper tube 70, and it is its maximum heat dissipation performance.

[0081] Look again Figure 10 , Figure 11 and Figure 12 As shown, a plurality of trapezoidal adjustment plates 77 are slidably mounted on one side of the fixing frame 72 . A sloped surface is arranged on one side of the trapezoidal adjustment plate 77 close to the T-shaped block 74 , and the sloped surface on one side of the trapezoidal adjustment plate 77 abuts against the corner of the T-shaped block 74 .

[0082] When the trapezoidal adjustment plate 77 approaches the heat-conducting copper tube 70 and squeezes it, the distance between the heat-conducting copper tubes 70 becomes larger, and the heat dissipation performance thereof gradually decreases.

[0083] When the trapezoidal adjustment plate 77 moves away from the heat-conducting copper tube 70 and squeezes it, the distance between the heat-conducting copper tubes 70 becomes smaller, and the heat dissipation performance thereof gradually increases.

[0084] Replay Figure 10 As shown, a guide column 79 is installed in the T-shaped slide groove 73 of the fixed frame 72, and the T-shaped block 74 is slidably arranged on the guide column 79, and a telescopic spring 80 is arranged between the two T-shaped blocks 74 located on the outer side of the guide column 79 and the inner wall of the fixed frame 72, and the telescopic spring 80 is sleeved on the guide column 79.

[0085] The telescopic spring 80 exerts an initial squeezing force on the T-shaped block 74. When the trapezoidal adjustment plate 77 is separated from the thermal copper tube 70, the telescopic spring 80 squeezes the thermal copper tube 70 through the T-shaped block 74 to minimize the distance between them and allow the thermal copper tubes 70 to be closely arranged.

[0086] Refer to Figure 6 As shown, specifically, a linkage screw 81 is further provided on the fixing frame 72. The trapezoidal adjusting plate 77 is screwed onto the linkage screw 81 on the fixing frame 72. Linkage gears 84 are installed on both the linkage screw 81 and the adjusting screw 30, and a linkage belt 85 is sleeved on the linkage gears 84.

[0087] During specific implementation, the present application can control the power adjustment of the relay in the electric energy meter 1 by rotating the adjusting screw 30. However, in order to ensure the synchronous adjustment of the heat dissipation performance of the heat-conducting copper tube 70 and the heat dissipation fan 76, the present application proposes the linkage screw 81.

[0088] During specific implementation, when rotating the adjusting screw 30, the linkage gear 84 on the adjusting screw 30 controls the synchronous rotation of the linkage screw 81 through the linkage belt 85. When the linkage screw 81 rotates, it can control the movement of the trapezoidal adjusting plate 77 through the thread structure, so that the trapezoidal adjusting plate 77 approaches or moves away from the heat-conducting copper tube 70.

[0089] When the trapezoidal adjusting plate 77 approaches the heat-conducting copper tube 70, the distance between the heat-conducting copper tubes 70 becomes larger; conversely, the distance between the heat-conducting copper tubes 70 becomes smaller.

[0090] During operation: First step, when it is necessary to adjust the power of the relay in the electric energy meter 1, rotate the adjusting screw 30 clockwise. The three adjusting blocks 32 provided at the upper end of the adjusting screw 30 synchronously approach the corresponding linkage rods 33. At this time, the first adjusting block 32 first contacts the corresponding first linkage rod 33. Therefore, the first linkage rod 33 is squeezed by the first adjusting block 32, so that it controls the center rod 23 connected to it to move downward. At this time, the downward-moving center rod 23 drives the other center rods 23 to move upward synchronously under the linkage of the center gear 24. One of the two center rods 23 moves upward and the other moves downward. Both of them control the two corresponding conductive sheets 21 to move synchronously towards the pin 41 of the relay until the two conductive sheets 21 abut against the pin 41 of the relay. At this time, the corresponding relay is connected in series with the circuit of the entire conductive rod 20.

[0091] Continuing to rotate the adjusting screw 30 will drive the second adjusting block 32 to squeeze the second linkage rod 33, and then repeat the above operation, so that the second relay on the second circuit board 3 is connected in series to the circuit of the conductive rod 20. Then, by analogy, multiple small relays 40 are connected in series to the circuit with the conductive rod 20. At this time, a high-power relay 4 with a large current is formed in the entire circuit.

[0092] Step 2: After the high-power relay 4 is adjusted, the entire electricity meter 1 can be connected to the entire circuit. As the electricity meter 1 is used, the high-power relay 4 will generate a large amount of heat. At this time, the heat conducting copper tube 70 will conduct out the heat, causing the heat to be guided along the heat conducting copper tube 70 to the heat dissipation fins 71, and then the heat dissipation fins 71 will conduct heat dissipation treatment.

[0093] Step 3: At the same time, the heat dissipation exhaust fan 76 is started to further achieve rapid heat dissipation.

[0094] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A large current relay integrated watt-hour meter for bidirectional measurement of power flow, comprising a mutually assembled outer shell (10) and an inner shell (11), a metering inner cavity (12) is formed between the outer shell (10) and the inner shell (11), and is characterized in that: There is also a first circuit board (2) provided in the metering cavity (12) formed by the outer shell (10) and the inner shell (11). A second circuit board (3) is provided on one side of the first circuit board (2). A high-power relay (4) is welded on the second circuit board (3). A metering module (5) is provided on the first circuit board (2). The high-power relay (4) and the metering module (5) are vertically integrated; An electromagnetic isolation layer (6) for isolating electromagnetic and heat is provided between the second circuit board (3) and the first circuit board (2). The electromagnetic isolation layer (6) is of a corrugated structure. A heat dissipation device (7) is provided on the high-power relay (4); The heat dissipation device (7) includes heat conduction copper tubes (70) laid equidistantly along the length direction on the second circuit board (3). A heat dissipation fin (71) is jointly provided on one side of the heat conduction copper tubes (70). The heat dissipation fin (71) is attached to the side wall of the outer shell (10), and a heat dissipation opening for the heat dissipation fin (71) to dissipate heat is provided on the side wall of the outer shell (10).

2. The integrated energy meter of a large current relay for bidirectional measurement of tidal current according to claim 1, characterized in that: The high-power relay (4) is composed of several small relays (40) of the same model. The several small relays (40) are installed on the second circuit board (3) equidistantly through their own pins (41).

3. The integrated energy meter of a large current relay for bidirectional measurement of tidal current according to claim 1, characterized in that: Two conductive rods (20) are symmetrically provided in the width direction of the second circuit board (3). Sliding conductive sheets (21) are respectively installed on the two conductive rods (20) along the vertical direction through wires. An auxiliary bracket (22) for assisting its movement and being insulated is installed on the conductive sheet (21). The auxiliary bracket (22) slides on the second circuit board (3). A centering rod (23) is installed between two auxiliary brackets (22) on the same vertical straight line. The sides of the two centering rods (23) close to each other are of a sawtooth structure, and a centering gear (24) is engaged between the two centering rods (23). The centering gear (24) rotates on the second circuit board (3); A reset insulating spring (25) is provided between the centering rod (23) and the second circuit board (3).

4. The integrated energy meter of a large current relay for bidirectional power flow metering according to claim 1, characterized in that: An adjusting screw rod (30) and a limiting rod (31) that are parallel to each other are rotatably connected to the inner wall of the outer shell (10). An adjusting block (32) is jointly provided on the adjusting screw rod (30) and the limiting rod (31). One side of the adjusting block (32) is of an inclined surface structure. A linkage rod (33) is installed on one centering rod (23). The linkage rod (33) and the adjusting block (32) are in the same plane.

5. The integrated energy meter of a large current relay for bidirectional measurement of tidal current according to claim 1, characterized in that: Two fixing frames (72) are symmetrically provided in the length direction of the second circuit board (3). A T-shaped sliding groove (73) is provided on the fixing frame (72). A T-shaped block (74) slides in the T-shaped sliding groove (73) of the fixing frame (72). The heat conduction copper tubes (70) are horizontally provided on the T-shaped blocks (74) on the same horizontal straight line of the two fixing frames (72). The distance between the several heat conduction copper tubes (70) is changed by adjusting the distance between the fixing frames (72).

6. The integrated energy meter of a large current relay for bidirectional measurement of tidal current according to claim 1, characterized in that: A return-shaped copper frame (75) is installed on the back side of the heat dissipation fin (71). One end of the heat conduction copper tube (70) close to the heat dissipation fin (71) slides inside the return-shaped copper frame (75). Several heat dissipation exhaust fans (76) are installed equidistantly inside the return-shaped copper frame (75).

7. The integrated energy meter of a large current relay for bidirectional measurement of tidal current according to claim 5, characterized in that: A number of trapezoidal adjusting plates (77) are slidably mounted on one side fixing frame (72). The side of the trapezoidal adjusting plate (77) close to the T-shaped block (74) is arranged in an inclined plane, and the inclined plane on one side of the trapezoidal adjusting plate (77) abuts against the corner of the T-shaped block (74).

8. The integrated energy meter of a large current relay for bidirectional measurement of tidal current according to claim 5, characterized in that: A guiding column (79) is installed in the T-shaped sliding groove (73) of the fixing frame (72). The T-shaped block (74) is slidably arranged on the guiding column (79). Between the two T-shaped blocks (74) on the outer side of the guiding column (79) and the inner wall of the fixing frame (72), a telescopic spring (80) is provided. The telescopic spring (80) is sleeved on the guiding column (79).

9. The integrated energy meter of a large current relay for bidirectional power flow metering according to claim 5, characterized in that: A linkage screw rod (81) is further provided on the fixing frame (72). The trapezoidal adjusting plate (77) is screwed on the linkage screw rod (81) on the fixing frame (72). Linkage gears (84) are installed on both the linkage screw rod (81) and the adjusting screw rod (30). A linkage toothed belt (85) is sleeved on the linkage gears (84).

10. The integrated energy meter of a large current relay for bidirectional measurement of tidal current according to claim 7, characterized in that: An extension rod (90) is further installed on the trapezoidal adjusting plate (77). An extension block (91) is installed at one end of the extension rod (90) away from the trapezoidal adjusting plate (77). A switch (92) is installed on the heat dissipation exhaust fan (76). The switches (92) are arranged at equal intervals along a straight line on the circular copper frame (75). Contact blocks (93) are slidably arranged on the switches (92). A contact tension spring (94) is connected between the contact block (93) and the outer wall of the circular copper frame (75). The extension block (91) and the contact block (93) are on the same straight line. When the extension block (91) moves, it squeezes the contact block (93), so that the contact block (93) controls the opening and closing of the switch (92).

Images