WO2011020416A1

WO2011020416A1 - Electric energy meter

Info

Publication number: WO2011020416A1
Application number: PCT/CN2010/075862
Authority: WO
Inventors: 埃尔南德斯·乔治·埃迪瓦多·蒙多亚
Original assignee: 宁波汉克电器有限公司
Priority date: 2009-08-18
Filing date: 2010-08-10
Publication date: 2011-02-24
Also published as: CN101634664A; CN101634664B

Abstract

An electric energy meter includes: a wiring board, a sensor, a main shell (1), an electronic measuring circuit (3) and a display element (4) which are equipped inside the main shell. The sensor is electrically connected with the electronic measuring circuit (3) and the display element (4) in turn. The wiring board is equipped outside the main shell (1). The sensor is equipped on the wiring board. The power cord (5) of commercial power is connected with a load through the sensor and the wiring board. The electronic measuring circuit (3) is connected with the power cord (5) via a lead wire.

Description

Electric energy meter

The present invention relates to an electric energy meter, and more particularly to a configuration of a sensor device for measuring voltage and/or current signals on a power supply line flowing through a load in an electric energy meter.

Say

Background technique

An electric energy meter is a meter for measuring the amount of electricity used. Therefore, it generally includes a sensor that is connected or interacts with a power line flowing through a load, a signal generated by the sensor to perform various calculations to obtain an energy-consuming electronic measuring circuit of the load. .

Typically, these sensors are located inside the meter housing and are then connected to sensors in the meter housing using a special patch panel that is used to hold the power line through the load while also receiving and transmitting the stream. Over the power line book

The function of the power supply is as shown in FIG. 1. The sensor 6, the electronic measuring circuit 3 and the display element 4 are all disposed inside the electric energy meter housing 1, and the power supply line 5 is connected to the sensor 6 through a wiring board 112. When measuring the energy consumption of the load, it is necessary to cut off the power line 5 flowing through the load, and usually connect the end of the power line 5 to the wiring board 112 using screws and terminal firmware, respectively.

Therefore, the process runs through the following steps: Cut off the power cord 5, cut off the insulation of the power cord 5 terminal, connect the power cord 5 connector into the outer casing of the terminal block 112, and tighten the screws of the terminal to strengthen the fixed power cord. wiring.

This process increases installation costs and introduces risks:

If the power cord terminal is not successfully connected to the terminal block, heat is generated and power is lost. This means that the consumer will bear the economic loss incurred; the risk inherent in the short circuit and explosion will be Public utilities or the public cause harm.

On the other hand, each meter must be configured with a different patch panel and different components (including patch panel housings and screws) that match the patch panel, which means that the manufacturer must produce different types of energy meters for each type. Model components; this increases inventory size and extends manufacturing time.

Therefore, there is an urgent need for a method for reducing the cost of manufacturing an electric energy meter, thereby eliminating the need to customize the mold for each type of electric energy meter, using specific manufacturing techniques; to reduce the amount of labor and reduce the risk of installation and operation of the electric energy meter.

Summary of the invention

The technical problem to be solved by the present invention is that it is not necessary to cut off the electric energy meter of the power line flowing through the load when the load consumes energy. The technical solution adopted by the present invention to solve the above technical problem is: the electric energy meter includes

Body housing

a sensor for measuring voltage and current signals on a power line flowing through the load;

An electronic measuring circuit is disposed in the body casing of the electric energy meter, and uses the voltage and current signals of the power line flowing through the load measured by the sensor to determine and measure the energy consumption of the load;

a display element, disposed in the body housing, connected to the electronic measuring circuit for displaying a value of a consumed energy of a load determined and measured by the electronic measuring circuit;

a wiring board disposed outside the body casing for fixing a power line flowing through the load;

The utility model is characterized in that: the wiring board comprises

a hollow cylinder through which the power line flowing through the load passes;

a fixing screw penetrating the hollow cylinder to fix the power line flowing through the load; the sensor includes

a current sensor disposed outside the body casing for measuring a current flowing through a load of the power line, the output end of the current sensor being electrically connected to the electronic measuring circuit through a wire;

a screw penetrating the hollow cylinder and piercing the power line flowing through the load to measure a voltage on a power line flowing through the load, the screw being electrically connected to the electronic measuring circuit through a wire .

According to another preferred mode of the present invention, the current sensor and the terminal block are both disposed inside a terminal housing, and the terminal housing is integrally connected with the body housing.

Another preferred mode of the present invention: the terminal housing includes a box-shaped base bracket, an intermediate bracket, the current sensor and the hollow cylinder are fixed on the intermediate bracket, and the intermediate bracket is fixed at the On the box-shaped base bracket.

According to another preferred mode of the present invention, the terminal housing further includes a cover bracket for fixing and sealing the intermediate bracket to which the current sensor and the hollow cylinder are fixed in the box-shaped base bracket, thereby The current sensor is isolated from the body housing.

According to another preferred mode of the present invention, the electric energy meter case includes an upper case and a lower case, and the upper case and the lower case are integrally formed by ultrasonic welding.

Another preferred mode of the present invention is an electric energy meter including a body casing, a wiring board disposed outside the body casing for fixing a power line flowing through the load, and a power line for measuring the flow through the load. a sensor for voltage and current signals, an electronic measuring circuit for determining and measuring energy consumption of the load, which is disposed in the body casing and measuring voltage and current signals of the power line flowing through the load measured by the sensor, disposed in the body casing and The electronic measuring circuit is connected to a display element for displaying a value of the energy consumption of the load determined and measured by the electronic measuring circuit, wherein: the terminal board is mounted on Outside the body housing, the mains power cord is completely connected to the load through the sensor and terminal block.

According to another preferred mode of the present invention, the power strip includes a power line fixing base through which the power line flowing through the load passes, and the power line fixing seat is mounted with a power taking device, and the power taking device is Contact the metal wires inside the power cord.

According to another preferred mode of the present invention, the power cord fixing base is a hollow cylinder, and the hollow cylinder is mounted with a fixing screw, and the fixing screw penetrates the hollow cylinder to fix the flow through the load. power cable.

Another preferred mode of the present invention is: the power taking device is a screw that penetrates the hollow cylinder and penetrates into the power line flowing through the load to measure the power line flowing through the load. Voltage, the screw is electrically connected to the electronic measuring circuit by a wire.

According to another preferred mode of the present invention, the sensor is a current sensor disposed outside the body housing, and an output end of the current sensor is electrically connected to the electronic measuring circuit via a wire.

According to another preferred mode of the present invention, the hollow cylinder includes a fixing member and a fastening component, and the fixing component is fixed on the intermediate bracket by screws, and the fastening component is fixed on the fixing seat by screws, and the fixing component and the fastening component are assembled. A hollow passage is formed between the pieces.

Compared with the prior art, the invention has the advantages that: when measuring the energy consumption of the load, it is not necessary to cut off the power line flowing through the load, and it is not necessary to cut off the insulation of the power line terminal, and it is not necessary for each type. Different types of electric energy meters must be equipped with different wiring boards and different components (terminal board shells and screws) matched with the wiring board, which reduces the production cost of the electric energy meter.

The invention does not need to cut off the power line, thereby eliminating various hidden dangers caused by the fixing of the power line is not tight, and the installation process is greatly shortened without cutting the power line, thereby reducing the use of various work and the labor intensity of the installer. , improved installation efficiency. The use of plastic to make the terminal block, no need to install metal joints, saving a lot of metal materials. It also reduces the number of fixed parts, reducing the burden and cost for the manufacturer. This solution can be applied to different types of electric energy meters, using pointed screws The connection between the utility power cord and the electronic measuring circuit can be achieved only by tightening the screws, making the connection process easy. The use of fixing bolts can prevent the power cord from loosening and provide a guarantee for the measurement accuracy of the sensor. The two-part power cord holder can be used to adapt to different thickness of the power cord. Ultrasonic welded electric energy meter housings can avoid non-strong damage. The scheme is simple in structure and convenient to install, and is suitable for use in various electric energy meters. DRAWINGS

1 is a schematic diagram of connection between an electric energy meter and a power line in the prior art;

2 is a diagram showing a manner of installing an electric energy meter and a power cord according to an embodiment of the present invention;

3 is a schematic diagram of a power cable passing through a connection interface according to an embodiment of the present invention;

4 is a schematic structural diagram of an electric energy meter according to an embodiment of the present invention;

FIG. 5 is an exploded view of an electric energy meter according to an embodiment of the present invention; FIG.

6 is a schematic structural view of an upper casing of an electric energy meter case according to an embodiment of the present invention;

7 is a schematic structural view of a lower casing of an electric energy meter case according to an embodiment of the present invention;

Figure 8 is a connection diagram between a lower case of the electric energy meter case and a box-shaped base stand of the terminal case in the embodiment of the present invention. detailed description

The invention will be further described in detail below with reference to the embodiments of the drawings.

Embodiment 1:

The electric energy meter shown in FIGS. 2 to 5 includes a hollow cylindrical body casing 1 and a hollow box-shaped terminal housing 2, and the body casing 1 and the terminal housing 2 are both made of plastic, and the terminals are The housing 2 is integrally connected with the main body housing 1; the main body housing 1 is internally provided with an electronic measuring circuit 3 and a display element 4; the terminal housing 2 is provided with a current sensor and a wiring board; wherein the current sensor is used to measure the flow through The voltage and current signals on the power line 5 of the load; the electronic measuring circuit 3 determines and measures the energy consumption of the load by using the voltage and current signals on the power line 5 flowing through the load measured by the current sensor, and the electronic measuring circuit 3 can adopt In the prior art, one or more circuit boards are formed; the display element 4 is connected to the electronic measurement 3 circuit for displaying the energy consumption value of the load determined and measured by the electronic measurement circuit.

The terminal block includes a hollow cylinder 21 through which the power line 5 flowing through the load passes; a fixing screw 22 and various fixing elements, the fixing screw 22 penetrating the hollow cylinder 21 for fixing the The power line 5 flowing through the load is shown in Figures 3 and 5; and the current sensor includes a current sensor 6 disposed on the hollow cylinder 21 for measuring the power line 5 flowing through the load. Current, the output of the current sensor 6 passes through the wire and the electronic measuring circuit 3 electrical connection; a screw 7, the screw 7 penetrates the hollow cylinder 21 and penetrates into the power line 5 flowing through the load to measure the voltage on the power line 5 flowing through the load, the screw 7 Electrically connected to the electronic measuring circuit by wires, see Figures 3 and 4.

The hollow cylinders 21 may be provided one or more as needed, and generally three or four may be provided. In this embodiment, three or three current sensors 6 may be provided as needed.

The terminal housing 2 includes a box-shaped base bracket 23, an intermediate bracket 24, and a cover bracket 25. The current sensor 6, the screw 7, the hollow cylinder 21, and the fixing screw 22 are fixed to the intermediate bracket 24. The intermediate bracket 24 is fixed on the base bracket 23, and the cover bracket 25 is used to fix the intermediate bracket 24 with the current sensor 6, the screw 7, the hollow cylinder 21, the fixing screw 22 and various fixing elements. The seal is fixed within the box-like base bracket 23 such that the sensor is isolated from the body housing 1. The two sides of the box-shaped base bracket 23 are provided with through holes corresponding to the hollow cylinder 21 through which the power supply line 5 flowing through the load passes.

The main body casing 1 includes an upper casing 11 and a lower casing 12, and the upper casing 11 and the lower casing 12 are integrally formed by ultrasonic welding. The upper casing 11 is provided with ultrasonic welding, and the lower casing 12 is also provided. There are edges for easy ultrasonic welding, see Figures 6, 7, and 8 to avoid tampering with the meter housing. Embodiment 2:

The electric energy meter of the present scheme is shown in FIG. 2 and FIG. 4, the electronic measuring circuit 116 and the display element 118 are installed in the body casing 100 of the electric energy meter, and the wiring board 112 is installed outside the main body casing, and the power cord 110 from the mains is directly worn. The wiring board 112 is connected to the load, and the sensor 114 is fixed to the wiring board 112 by screws.

As shown in Figures 4 and 5, the terminal block includes a terminal housing, a terminal housing 2, a cover 25, a power cord mount 21, and an intermediate bracket 24. Wherein the sensor is used to measure the voltage and current signals on the power line 5 flowing through the load; the electronic measuring circuit 3 determines and measures the energy consumption of the load by using the voltage and current signals on the power line 5 flowing through the load measured by the sensor, The electronic measuring circuit 3 can be formed into one or more circuit boards by using conventional conventional techniques; the display element 4 is connected to the electronic measuring 3 circuit for displaying the energy consumption value of the load determined and measured by the electronic measuring circuit. The terminal housing is a concave box-shaped body, and the connecting end of the terminal housing and the body housing has a connecting line passage, the intermediate bracket is fixed at the bottom of the terminal housing, and the power cord fixing seat is mounted on the intermediate bracket, and the sealing is installed The cover is attached to the open face of the terminal housing by snapping or bolting, so that the terminal block forms a closed casing, thereby isolating the sensor body casing 1.

The power cord fixing base is a structure with a hollow passage and capable of fixing a power cord. The solution provides two power cord fixing base structures, one is a hollow cylindrical tube; the other is a combined part, and the combined components include The fixing member and the fastening member are fixed on the intermediate bracket by screws, and the fastening member is connected with the fixing member by screws, and the fixing member and the fastening member are A hollow channel is formed between the power cable and the power cable is clamped in the middle. The structure is suitable for a long distance between the power cable and the load. The power cable fixing bracket of the above two structures can adopt an integrated structure and is fixed on one power cable. There are multiple hollow channels in the seat, and each hollow channel corresponds to one power cord. It is also possible to use each power cord to be fixed by a single power cord holder. The integrated power cord holder is suitable for a designed or conventional power supply. The structure of the number of wires, and the separate power cord holder can be increased or decreased at any time, suitable for the number of power cords under special circumstances. The sensor of this solution can be fixed on the intermediate bracket. The sensor of this mode needs to be installed on one side of the power cord fixing seat to facilitate the passage of the power cord. The sensor can also be fixed on the power line fixing seat. When the sensor is fixed on the power line fixing seat, the sensor measuring hole coincides with the axis of the power line fixing seat hollow channel, regardless of the installation method, the number of sensors and the number of power lines correspond. In order to prevent the power cord from moving in the power cord fixing seat, a fixing bolt is mounted on the power cord fixing seat, and the fixing bolt is in contact with the power cable through the threaded hole on the power cord fixing seat, and the contact end of the fixing bolt and the power cable is Plane, when the fixing bolt is screwed down, the fixing bolt will press the power cord tightly into the power cord holder.

A power take-off device is also installed on the power line fixing base. The power take-off device can be connected to the metal wire inside the power line without cutting off the power line, and is used for measuring the voltage on the power line 5 flowing through the load. As shown in Figure 3, the power take-off device of this solution is realized by a pointed screw. The pointed screw is screwed into the power cord in the power cord fixing seat by the internally threaded hole on the power cord fixing seat. The tip of the head screw punctures the insulation of the power cord to the metal wire in the middle of the power cord, and the tail of the pointed screw connects a wire to the electronic measuring circuit. In order to prevent the tip screw from being screwed too far to cause damage to the metal wire, one method is to measure the length of the tip screw, the structure of the power cord holder, and the diameter of the power line insulation used. And the calculation, when the pointed screw is completely screwed into the hole in the power cord fixing seat, the tip end of the pointed screw just contacts the metal wire in the power cord, and the method is suitable for the same manufacturer's complete product. Another method is to mark the shaft of the pointed screw to identify the depth of screwing. For example, multiple overlapping rings are marked on the rod with different colors. The operator can compare according to the prior comparison. The pointed screw is screwed to the position of the shaft of the corresponding color, that is, the tip of the pointed screw is in contact with the metal wire, and the method is suitable for the cooperation between the different components.

The power take-off device can also be in the form of a probe, the probe is fixed in the power line fixing seat, one end of the probe is located in the hollow channel of the power line fixing seat, and the other end is connected to the electronic measuring circuit through the wire, when the power line is stuck When the power cord is fixed, the protruding end of the probe is inserted into the insulating layer of the power cord to contact the metal wire. This method can avoid damage to the metal wire by the probe, because when the protruding end of the probe is in contact with the metal wire, The surface of the probe is brought into contact with the metal wire by sliding off the metal wire due to the small contact surface of the protruding end and the metal wire.

The power line access hole 23 is opened on the corresponding two sides of the terminal housing, and the power line access hole can be opened in the middle position of the side edge, or can be opened at the edge position, and the power line access hole opened at the edge position is an opening. Hole, when the cover is in the terminal housing When the body is in the body, close the power cord into the hole. Compared with the former method, the latter type of opening is more convenient when installing the power cord. A rubber ring for preventing wear is installed in the power line access hole.

As shown in FIGS. 6, 7, and 8, the body casing of the electric energy meter includes an upper casing and a lower casing, and the middle of the upper casing is an observation window made of a transparent material, and the inner ring edge of the upper casing has a screw hole. A protruding screw hole column is arranged at a position corresponding to the screw hole of the lower casing of the lower casing, and the upper casing and the lower casing are fixed together by screw through the screw hole and the screw hole column, so as to prevent non-workers from being in the body casing The components are modified, and the outer edges of the upper and lower casings respectively have closed edges. When the upper and lower casings are butted, the closed edges of the two shells are attached together, and then the ultrasonic waves are used to fix them, so that the non-violent In this case, it cannot be opened, which ensures the accuracy of data collected by the energy meter.

The body casing and the wiring board of the present solution are both made of plastic, which removes the metal material of the prior art which is connected to the power cord connector, and saves a lot of materials and manufacturing processes. The body housing and the terminal housing can be either split or integrated, depending on the specific installation site.

In the installation, the electronic measuring circuit and the display component are installed in the body casing, and the opening at one end of the terminal housing is corresponding to the opening on the side of the body casing, and then the two are fixed together, and the intermediate bracket is fixed at the terminal. The bottom of the housing, the sensor and the power cord fixing seat are mounted on the intermediate bracket in a manner corresponding to the hollow channel, and the signal output line of the sensor and the wire of the power taking device on the power line fixing seat pass through the terminal housing and the body housing The line channel between the two is connected to the electronic measuring circuit, and the power line of the mains is sequentially passed through the side of the terminal housing, the sensor, the power line fixing seat and the other side of the terminal housing, and then connected to the load, and then fixed and fixed. The position of the bolt and the power take-off device, the cover is sealed, and the upper and lower shells of the body shell are ultrasonically welded to complete the installation of the entire electric energy meter.

Claims

Claim

1. An electric energy meter, including

Body housing (1);

a sensor for measuring voltage and current signals on a power line (5) flowing through the load;

An electronic measuring circuit (3) is disposed in the body casing (1) of the electric energy meter, and the voltage and current signals flowing through the load power line (5) measured by the sensor are used to determine and measure the load consumption. Energy

a display element (4) disposed in the body casing (1) and connected to the electronic measuring circuit (3) for displaying a value of a consumed energy of a load determined and measured by the electronic measuring circuit;

a wiring board disposed outside the body casing (1) for fixing a power line (5) flowing through the load;

The utility model is characterized in that: the wiring board comprises

a hollow cylinder (21) through which the power line (5) flowing through the load passes;

a fixing screw (22), the fixing screw (22) penetrating the hollow cylinder (21) for fixing the power line (5) flowing through the load;

The sensor includes

a current sensor (6) disposed outside the body casing (1) for measuring current flowing through a load power line (5), the output of the current sensor (6) passing through the wire and the electron Measuring circuit (3) is electrically connected;

a screw (7) penetrating the hollow cylinder (21) and piercing the power line (5) flowing through the load to measure the voltage on the power line (5) flowing through the load, The screw (7) is electrically connected to the electronic measuring circuit (3) via a wire.

2. The electric energy meter according to claim 1, wherein: the current sensor and the wiring board are both disposed inside a terminal housing (2), the terminal housing (2) and the The body casing (1) is connected in one piece.

3. The electric energy meter according to claim 2, wherein: the terminal housing (2) comprises a box-shaped base bracket (23), an intermediate bracket (24), the current sensor and the hollow cylinder (21) is fixed to the intermediate bracket, and the intermediate bracket is fixed to the box-shaped base bracket.

4. The electric energy meter according to claim 3, wherein: said terminal housing (2) further comprises a cover bracket (25) for fixing said current sensor and said The intermediate bracket (24) of the hollow cylinder (21) is fixedly sealed in the box-shaped base bracket (23), thereby isolating the current sensor from the body casing (1).

5. The electric energy meter according to claim 1, wherein: the electric energy meter case includes an upper case and a lower case, and the upper case and the lower case are integrally formed by ultrasonic welding.

6. An electric energy meter comprising a body casing (1), a wiring board (112) disposed outside the body casing (1) for fixing a power line (5) flowing through a load, for measuring a flow through A sensor (6) for voltage and current signals on the loaded power line (5), a voltage and current signal disposed on the power line (5) of the load through the load measured in the body housing (1) And an electronic measuring circuit (3) for measuring the energy consumption of the load, disposed in the body casing (1) and connected to the electronic measuring circuit (3) for displaying the energy consumption value of the load determined and measured by the electronic measuring circuit The display component (4) is characterized in that: the terminal board is installed outside the body casing, and the mains power supply line (110) passes through the sensor and the wiring board and is connected to the load.

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7. The electric energy meter according to claim 6, wherein: said wiring board includes a power cord fixing seat through which said power supply line (5) flowing through said load passes, said power cord fixing seat A power take-off device is mounted thereon, and the power take-off device is in contact with a metal wire in the power cord.

The electric energy meter according to claim 7, wherein the power cord fixing base is a hollow cylinder (21), and the fixing screw (22) is mounted on the hollow cylinder, the fixing screw (22) Passing through the hollow cylinder (21) for fixing the power line (5) flowing through the load.

9. The electric energy meter according to claim 8, wherein the power take-off device is a screw (7) that penetrates the hollow cylinder (21) and penetrates the power source flowing through the load. In the line (5), the voltage on the power line (5) flowing through the load is measured, and the screw (7) is electrically connected to the electronic measuring circuit (3) through a wire.

The electric energy meter according to claim 9, wherein the sensor is a current sensor (6) disposed outside the main body casing (1), and the output end of the current sensor (6) passes through the electric wire. It is electrically connected to the electronic measuring circuit (3).

11. The electric energy meter according to claim 10, wherein: said current sensor and said wiring board are both disposed inside a terminal housing (2), said terminal housing (2) and said The body casing (1) is connected in one piece.

12. The electric energy meter according to claim 11, wherein: the terminal housing (2) comprises a box-shaped base bracket (23), an intermediate bracket (24), the current sensor and the hollow cylinder (21) is fixed to the intermediate bracket, and the intermediate bracket is fixed to the box-shaped base bracket.

The electric energy meter according to claim 12, wherein the hollow cylinder comprises a fixing member and a fastening member, wherein the fixing member is fixed to the intermediate bracket by screws, and the fastening member is fixed on the fixing seat by screws. A hollow passage is formed between the mounted fixing member and the fastening member.

The electric energy meter according to claim 13, wherein: said terminal housing (2) further comprises a cover bracket (25) for fixing said current sensor and said The intermediate bracket (24) of the hollow cylinder (21) is fixedly sealed in the box-shaped base bracket (23), thereby isolating the current sensor from the body casing (1).

15. The electric energy meter according to claim 14, wherein: the electric energy meter case includes an upper case and a lower case, and the upper case and the lower case are integrally formed by ultrasonic welding.

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