CN105203813A - Compact meters, electrical plug-in metering devices - Google Patents

Abstract

A compact timepiece and a measuring instrument are provided, which are composed of a body and a holder electrically isolated from the body. The body is internally provided with a metering function part, and the body is connected into a corresponding slot of the external bearing seat in a plug-pull manner through a plug arranged on the back side of the body. In one embodiment, the socket has a transformer assembly and a power circuit for sampling and converting power line ac power to dc power for supply to the body through the slot. The metering function part is only provided with a sampling circuit, a metering circuit, a singlechip, a communication circuit and a direct current conversion circuit, receives a sampling signal provided by the slot, and converts direct current into working voltage for the singlechip and the communication circuit. In another embodiment, the bearing seat is provided with a wiring groove for conducting the power line of the power grid and a mutual inductor assembly connected to the wiring groove, and the metering function part is provided with a power taking circuit, a sampling circuit, a metering circuit, a single chip microcomputer and a communication circuit.

Description

Compact meters, electrical plug-in metering devices

technical field

Multiple embodiments of the present invention relate to plug-in electric power collection equipment, especially electric meters or distribution transformer terminal equipment for plug-in collection, which belong to the grid power system technology.

Background technique

Power collection equipment, such as electric meters, are used for grid power supply or business departments to read the electricity consumption behavior and cumulative amount of electricity users. In general technology, electric meters or distribution transformer terminals are centrally installed in outdoor meter boxes. An electric meter is enclosed by two parts of the shell and the base to form the main part of the electric meter, and the power line is connected to and connected with the zero line and live line through the terminal button box designed inside the body to form the measurement link in the load circuit. . Usually, in order to save internal space, the terminal box needs to be installed on one side of the body. On the one hand, it saves the wiring loop, and on the other hand, it keeps the strong current part as far as possible from other circuit boards inside the body and possible electromagnetic interference.

With the continuous improvement of power grid technology, the complexity of the function and electrical performance of the meter has led to more and more components such as internal circuit boards, which in turn makes the body volume continue to increase, affecting the design space and electrical isolation design of the meter itself.

Contents of the invention

The present invention re-improves the structure of the current electric meter or distribution transformer acquisition terminal, reduces and simplifies the design of the conventional meter body, and designs the structure of the electric meter in a pluggable manner, so that it can be easily replaced, maintained and used.

In one aspect of the technical solution of the present invention, the body structure of the electric meter is mainly composed of 3.3V-5V electrical components spliced together, for example, it can be integrated on a PCB circuit board, and is mainly used to realize the basic measurement and calculation functions of the electric meter itself and the remote communication function. Correspondingly, a conductive path is designed in the socket matched with the above-mentioned body structure, and the configuration of the conductive path can be various, including an input/output line formed side by side of the neutral line N, the live line L and the possible ground line E. At the same time, a transformer coil for inductive alternating current change is installed on the line, and (for example) an isolation transformer assembly connected thereto is used to convert the alternating current on the line into a low-voltage direct current (for example, 12A-15A size) for sampling The circuit can directly obtain the voltage and current signals in it.

On the other hand, according to the needs of power transformation, the power-taking components are designed inside the body, and the power-taking components can not be arranged in the seat according to the needs. Cut off the power path in the cable trough, and set up to control its power on and off by plugging and unplugging during the installation process.

In order to achieve the above effects, the technical solution 1 of the present invention: the compact meter is composed of a body and a socket electrically isolated from it, wherein the metering function part is arranged in the body, and the body is provided through a plug provided on the back side of the body. Plug-in connection to the corresponding slot of the external socket. The socket has: a transformer assembly connected between the power line of the power grid and the user load, which is electrically connected to the slot, and is used to sense the variation of the AC signal on the power line; An electric circuit is used to convert the alternating current of the power line to direct current and provide it to the above-mentioned body through the slot. The metering function part has: a sampling circuit, electrically connected to at least a part of the plug, and sensing the current and voltage signals introduced into the AC power line of the body; a metering circuit, connected to the sampling circuit to read the current and voltage signals for integration computing; a single-chip microcomputer, electrically coupled to the metering circuit to process the integral calculation value; electrically connected to the communication circuit of the single-chip microcomputer; and a DC conversion circuit, converting the direct current provided from the slot into the single-chip computer and communication The operating voltage for the circuit.

As an effect, the above-mentioned body structure can be electrically isolated from the seat part through the casing or other conventional accessories. In general ammeter technology, shielded metal covers are usually used to achieve effective isolation between the transformer or transformer and the metering function part. To achieve electromagnetic compatibility (EMC), the embodiment of the present invention can easily achieve this effect. The seat part can first obtain and transform the AC induced current or voltage variable on the power line L/N, so as to directly provide DC for the body. The form of voltage, current signal source and power source required for chip work, the socket body can be electrically isolated and installed according to the specifications. On this basis, the body can be designed to be more compact, thereby increasing the PCB layout design space.

In an improved aspect, the plugs are provided independently of each other: a first plug (or pin) for obtaining current and voltage signals from a part of the above-mentioned slots; and a second plug for obtaining signals from another part of the above-mentioned slots Obtain direct current for power supply.

Technical solution 2: Electrical plug-in metering equipment, which is composed of a body and a socket, wherein the electrical function part is arranged in the body, and the body is pluggably connected to the external socket through a plug provided on the back side in the corresponding slot. The seat has: a cable trough, which is used to form an electrical conduction path between the grid power line and the user load; and a transformer assembly connected to the cable trough, which is electrically connected to the slot, for The amount of change in the alternating current signal on the induction power line. The electrical functional part has: a power-taking circuit, which obtains the AC power on the above-mentioned electrical conductive path through the plug to convert to DC power; a sampling circuit, which is electrically connected to the plug, and induces the AC power into the main body of the electrical plug-in metering device. The current and voltage signals of the power line; the metering circuit, connected to the sampling circuit to read the current and voltage signals for integral operation; the single-chip microcomputer, electrically coupled to the metering circuit to process the integral operation value; and electrically connected to the single-chip microcomputer communication circuit.

In an improved aspect, the plugs are provided independently of each other: a first plug, used to obtain alternating current from a part of the slots; and a second plug, used to block at least part of the electrical conduction of the wiring groove in the socket. or, for inserting the second bayonet piece and pressing down the movable connecting plate to lead through the inner cable groove of the socket. In another effect, considering that the electric meter is equipped with a relay or a circuit breaker assembly, in the embodiment of the present invention, it can be turned on and off by means of wiring slots and plugs, which replaces the need for separate installation of relays. Additional configuration and cost, easier to install.

In another aspect of improvement, a first bayonet piece and a second bayonet piece are arranged in the slot, and the first bayonet piece is composed of a pair of input side bayonet pieces connected to the grid power line end and a connection The output side bayonet parts at the load end of the power grid user, wherein the first and second bayonet parts are embedded in the corresponding bayonet mounting plates in the slots.

Wherein, each first bayonet part is attached with a hook-shaped protruding part, which is used for snapping into the body after the body is installed at a proper position in the socket.

Further, there is also in the socket: a receiving plate for receiving the second bayonet part, which is used to raise the height of the second bayonet part to be higher than the height of the plane where the first bayonet part is located, so that the second plug and the first bayonet part The two bayonet parts first contact; and the movable connecting plate located in the seat, an elastic conflicting part is arranged between the movable connecting plate and the bottom of the seat, so that it has the same extension as the hook-shaped protruding part between the bottom of the seat. The initial position of the face. In this initial position, the hook-shaped projection is in a horizontal position. Preferably, the hook-shaped protruding part is fixed on a threading shaft, so that the hook-shaped protruding part can rotate along the fixed axis with the threading shaft.

Further, the bottom of the movable connection plate is provided with electrical contacts. When the second plug continues to press down on the movable connection plate until the penetrating linkage shaft is limited to the second locking position, the electrical contacts are inserted into the electrical contacts in the wiring groove. In the slot, thus conducting the wiring slot. Moreover, the electrical contact piece is electrically connected to the first bayonet piece, so as to conduct the two first bayonet pieces on the input side and the output side. As an effect, the wiring trough will not conduct before the body is installed, only after the conductive contact at the bottom of the movable connection plate is pressed down to the contact groove in the wiring trough, the wiring trough and the conductive contact will be turned on at the same time The first bayonet part that is in electrical contact with each other makes it easier and more convenient to install the above body.

At the same time, the bottom of the movable connecting plate is further provided with locking hooks, and the bottom of the seat is provided with a pair of locking movable buckles arranged horizontally, and a locking buckle is respectively arranged at the end of the extending part of the locking movable buckles to the bottom of the bearing seat. , the locking hook is engaged with the locking buckle, so that the movable connecting plate is locked on the bottom of the seat, and then the above-mentioned hook-shaped protruding part is locked in the second breaking position. When the installer needs to remove the above-mentioned body, he only needs to press the two locking movable buckles toward the seat, and the movable connecting plate will be loosened and returned to the original position under the tension of the elastic conflicting part, and the hook will The protrusions are automatically linked to a horizontal position.

As an improvement to each of the above technical solutions, the mounting plate of the socket extends into at least a part of another socket, wherein the bayonet mounting plate is spliced and fixed through the contact boundaries of the two sockets. As another effect, the installation method of the bayonet parts is more flexible and convenient. Because the way of ordinary sockets is to insert the bayonet parts directly on the conductive wires by means of screws or welding, this method is not conducive to the maintenance and maintenance of the sockets. replace. Generally, when a large current flows through the conductive circuit in the socket, it is easy to cause cumulative damage at the socket socket due to the occasional arc effect or incorrect insertion method. The installation method of the bayonet part of the present invention can Enables easy replacement of housing elements.

Description of drawings

Fig. 1 is a schematic diagram of the disassembly and assembly structure of the plug-in metering device of the present invention;

Fig. 2 is a schematic diagram of the plug-in installation of the first bayonet part at the bottom of the electric meter holder of the present invention;

Fig. 3 is a schematic diagram of the plug-in installation of the second bayonet part at the bottom of the electric meter holder of the present invention;

Fig. 4 is the installation schematic diagram that the ammeter of the present invention is installed in the electrical box;

Fig. 5 is a structural and functional block diagram of the first embodiment of the electric meter of the present invention;

Fig. 6 is a schematic cross-sectional structure diagram of the electric meter seat of the present invention.

Detailed ways

Preferred embodiment of the present invention is described in detail in conjunction with the form of accompanying drawing, and the improvement of the present invention mainly lies in:

1. The structural body 1 of the electric meter with a compact design (as shown in FIG. 1 ). Its electrical function part is limited by a signal acquisition PCB circuit board inside the body. Wherein the terminal button box or terminal of the neutral wire N/live wire L is not provided in the body, and the terminal part is arranged outside the meter body or can be directly replaced, such as the back side shown in Figure 2, which is designed as a conductive plug 11 form. In one embodiment, the size of the plug (or it can be called a knife-shaped electrical connection part) 11 can be different from the general plug and socket construction size and construction angle, in order to achieve smaller connection internal resistance and more stable electrical contact , the size of the knife-shaped part 11 can be thicker and longer, and can be designed as a tin-plated copper material, so that the knife-shaped part 11 can be connected with the socket after reaching a fixed melting point due to the temperature generated by the internal resistance after electrical contact with the socket 2. Closer electrical contact is formed between the holes.

From the embodiment of Fig. 2, the number of plug/knife-shaped parts 11 can be designed as four for single-phase meters, and six or more for other smart meters. Due to the simplification of the internal structure, the volume of the main body 1 can be greatly reduced. For example, from the external structure, the main body can be divided into the display section 13 shown in Figure 3, the communication section 12 and the signal acquisition section 14 (generally Next, the communication terminal 12 can be directly arranged on the top of the main body 1, and an opening can be made on the top of the main body according to the requirements of the communication rules, so as to facilitate the selective disassembly and assembly of different communication modules). For example, since the terminal button box is a contact terminal for a higher AC voltage of 220V to 380V, a larger volume of crimping conductive parts and space isolation design are used in the design of the contact parts. If this part is omitted, the internal space will be reduced. Can be greatly simplified.

2. The electric meter equipment is assembled by plugging and unplugging. The side view of Fig. 2 depicts the single-phase electric meter body 1 shown in Fig. 1 and the seat 2 matched with it (the basic shape of the seat 2 is not limited to a circle, it is only used for convenience of description, and omission only the key components are shown). The bottom side of the body 1 is provided with a first plug 11, which is used for electrical insertion into the corresponding four slots (not shown in the figure) of the socket 1, and the socket 2 is electrically connected to the grid power line and the grid user between loads.

According to the above improvements, as the first embodiment of the present invention, the compact single-phase meter is composed of a body 1 and a socket 2 electrically isolated therefrom. Wherein, the metering function part of the electric meter is arranged in the body 1 , and the body 1 is pluggably connected to the corresponding slot of the external socket through the plug 11 provided on the back side of the body 1 .

Further referring to FIGS. 1 to 5, the socket 2 has: a transformer assembly 211 (such as a current/voltage transformer winding) connected between the grid power line and the user load, which is electrically connected to the slot for inductive power line and the power-taking circuit 212 connected to the transformer assembly 211 for converting the AC power of the power line to DC and providing it to the above-mentioned body 1 through the slot.

The metering function part has: a sampling circuit 111, which is electrically connected to at least a part of the plug, and senses the current and voltage signals introduced into the AC power line of the body; a metering circuit 113, which is connected to the sampling circuit to read the current and voltage signals Carry out integral calculation; Single-chip microcomputer 114, electrically coupled described metering circuit to process described integral operation value; Electrically connect the communication circuit 115 of described single-chip microcomputer; And DC conversion circuit 112, convert the direct current that provides from described slot into supply The +3.3V operating voltage used by the single-chip microcomputer 114 and the communication circuit 115.

As the second embodiment of the present invention, in an electrical plug-in metering device, the socket 2 has: a cable slot 28 for forming a 220V electrical conduction path between the grid power line 100 and the user load; The transformer assembly 211 on the wire slot 28 is electrically connected to the slot and is used for sensing the variation of the AC signal on the power line.

The electrical functional part has: a power-taking circuit 212, which obtains the AC power on the above-mentioned electrical conductive path through the plug to convert to DC power; a sampling circuit 111, which is electrically connected to the plug 11, and is induced into the electrical plug-in metering device body 1 the current and voltage signals of the AC power line; the metering circuit 113, connected to the sampling circuit to read the current and voltage signals for integral calculation; the single-chip microcomputer 114, electrically coupled to the metering circuit to process the integral calculation value; and electrically connected The communication circuit 115 of the single-chip microcomputer.

In any of the above embodiments, a bayonet member is provided in each slot, and the shape of the bayonet can be the shape shown in the figure, or other shapes that are convenient for fastening the plug. The bayonet pieces include a first bayonet piece 21 a , 21 b , 22 a or 22 b and a second bayonet piece 26 . These first bayonet pieces are composed of a pair of input side bayonet pieces 21a, 21b and a bayonet piece 22a, 22b connected to the grid user load side. The above-mentioned bayonet piece is embedded in the corresponding bayonet mounting plate 23 in the slot. Preferably, the structures of the first and second bayonet pieces are different from each other, or the positions of the first and second bayonet pieces can be exchanged.

Among them, according to the first embodiment of the present invention, the above-mentioned first bayonet part includes input side bayonet parts 21a, 21b that provide sampling voltage and current input for the sampling circuit in the body 1 and provide the voltage and current output path. The bayonet parts 22 a , 22 b on the output side and the second bayonet part 26 serve as interfaces for supplying DC voltage to the DC conversion circuit in the main body 1 . According to the second embodiment of the present invention, the first bayonet part is composed of input side bayonet parts 21a, 21b connected to the grid power line end and output side bayonet parts 22a, 22b connected to the power grid user load end arranged in pairs, and the second The second bayonet piece 26 is used as an on-off switch of the cable slot 28 . Any one of the bayonet pieces is embedded in the corresponding bayonet mounting plate 23 in the slot.

Taking the bayonet piece 21a as an example, a plurality of metal slots are formed in the mounting plate 23, and the bayonet piece 21a can be inserted into the bayonet mounting plate 23 shown in FIG. Then the other end thereof is also pushed toward the bayonet mounting plate 23 along the H direction by another mounting plate 25 so as to lock the bayonet piece 21 a in the socket 2 . Similarly, the installation method of the second bayonet member 26 is the same. For each bayonet piece, its shape can be designed as shown in the figure, that is, similar to the configuration relationship between the plug and the socket, the watch body 1 is inserted into the socket 2 longitudinally along P to achieve electrical conduction.

In an improved aspect, the mounting plate 25 of the socket 2 extends into at least a part of another socket, wherein the bayonet mounting plate 23 is spliced and fixed by the contact boundary of the two sockets 2 . Referring to FIG. 4 , the mounting plate 25 extends to another seat or is a part of another seat, and the seats 2 need to be fixed in batches in a meter box or an electrical cabinet. On the mounting plate 25, in order to realize that the above-mentioned bayonet piece can be taken out or replaced after the body 1 is removed, a mounting plate 25 is provided with a space, so that the mounting plate can be removed against the mounting direction (direction H) on the surface of the seat 2 25 (for example, the center of the mounting plate 25 in Fig. 3 is provided with an interval space, and the mounting plate is divided into two equal-area parts that clamp the above-mentioned bayonet parts), and in the embodiment of the present invention, the mounting plate 25 is installed with the bayonet After contacting and splicing between the plates 23, lead seals for threading can be used to lock them.

Referring to FIG. 1 , each first bayonet member has a hook-shaped protrusion, which has a protruding part 24 extending to the outside of the bayonet mounting plate in the figure and an upwardly extending barb end portion 241 at the end of the protruding part 24, It is used to snap into the body 1 after the body 1 is installed at a proper position in the seat 2 .

Referring to Figures 2 and 3, further, each of the bayonet parts has a push-down elastic contact part 261, which is configured to make the hook-shaped protruding part snap in after being contacted and pressed down by the plug. The extension between the bottoms of the mouthpieces produces a first breakage position 242 or 243, wherein the breakage generated at the bottom of the first bayonet piece 21a pushes the barb end portion 241 at the end of the protruding part 24 to hook into the first breakage in the body 1. Inside the second fracture location 15 . As a supplementary example, the second breaking point 15 can be used as a disassembly point of the body 1, that is, the second breaking point 15 divides the body 1 into two mutually enclosed parts of the top shell 18 and the bottom shell 17, and the barb protrusion 241 The bottom shell 17 is clamped, and the top shell 18 and the bottom shell 17 can be fixed together by a lead seal.

Referring to FIG. 4 , a cable trough 28 is further penetrated inside the socket 2 . Electrical contacts are received at both ends of the cable trough 28 , which are respectively used as connection parts for the L and N lines of the power grid and the load end. For example, the two ends of the cable trough 28 are provided with an input end 27 a and an output end 27 b connected to the grid power line 100 side. In a preferred example, the output end 27b or the input end 27a is designed as a replaceable component, so that different power lines can be connected in the wire slot 28 as required. The cable slot 28 connects the bayonet parts 21a (Fig. 3) to 22b. Once the plug 11 is inserted into the bayonet part 21a, there is an elastic contact part 261 inside the 21a. Line 28 is electrically conductive.

For example, according to the spirit of the second embodiment of the present invention, the second plug 16 is designed as a non-conductive material, which is used to block the AC conductive path in the cable slot 28, and is arranged between the cable slot 28 and the first bayonet member. For example a bypass switch, which is turned on after the plug 16 is inserted into the bayonet part 26 . A power-taking circuit is arranged in the body 1, and it obtains power through the first bayonet piece. According to the spirit of the first embodiment of the present invention, the second plug 16 is used as a DC power-taking component, and accordingly the second bayonet piece 26 is not directly connected to the cable slot 28, but a power circuit is provided, and the After the 220V alternating current is converted into 12V direct current, it is directly provided to the electrical board in the main body 1 without a switch function. At the same time, a transformer and a transformer assembly are also arranged between the first bayonet piece and the cable slot, which induces the AC variable in the power line 100 or the cable slot 28 into a chip-readable electrical signal variable, thereby reducing its current through the transformer. /Voltage value, passed to the microcontroller to read.

2 and 3, in the improvement of the first embodiment, the plug 11 is provided independently of each other: the first plug 11 corresponding to the first bayonet parts 21a to 22b, used for from a part of the above-mentioned slot (ie The current and voltage signals are mainly obtained from the above-mentioned bayonet piece); and the second plug 16 corresponding to the second bayonet piece 26 is used to obtain a DC current of (for example) 12A for power supply from another part of the above-mentioned slot. Wherein if the plug is constructed in the form of a knife, the configuration of the bayonet part can be tightened from the outside to the inside as shown in Figure 3, and if the plug is in the form of a common copper sheet or pin, in order to achieve stable electrical For contact, the bayonet piece can be designed as an inwardly tightened shrapnel as shown in Figure 2. In terms of improvement of the second embodiment, the plugs are provided independently of each other: the first plug 11 corresponding to the first bayonet parts 21a to 22b, used to obtain 220V AC power from the first bayonet parts; and the corresponding The second plug 16 of the second bayonet part 26 is used to block the conductive path of the inner wiring groove 28 of the socket 2, and instead provide current/voltage to the four first bayonet parts 21a to 22b from the bypass .

According to the first or second embodiment of the present invention, the method for installing this single-phase electric meter includes:

Step 1. Provide the main body 1 and the matching seat 2, install a single-layer electrical board in the main body 1, as the metering function part of the meter, set several lead-out terminals from the single-layer electrical board to connect the device The first plug 11 is provided with a slot matching the configuration of the plug in the socket 2, wherein the first bayonet parts 21a to 22b are arranged in the socket, and they are connected to the wiring grooves in the socket 2 28, the wire trough 28 is connected to the grid power line 100;

Step 2. Press the body 1 down to the socket 2 along the P direction, so that the first plug 11 is in complete electrical contact with the first bayonet piece;

Step 3. Press down (for example) the elastic contact part 261 provided in the first bayonet part 21a by the first plug 11, so that the barb-shaped protruding part 241 at the end of the protruding part 24 is on the bottom of the bayonet part 21a on the seat 2 The first breakage position 242 or 243 is generated by the extending part between the two parts, wherein the breakage produced at the bottom of the first bayonet part 21a pushes the barb end part 241 at the end of the protruding part 24 to hook into the second breakage position 15 in the above-mentioned body 1 Inside, wherein the barb end portion 241 is used to clamp the bottom shell 17 of the body 1:

Step 4. Fix a single-layer electric board in the bottom shell part 17 of the body 1, or install a multi-layer electric board according to different needs, install the top shell 18 on the bottom shell 17, and fasten it with a lead seal.

In one example, the back side of the body 1 is provided with a second plug 16 (not shown in FIG. 1 because of occlusion). As shown in FIGS. The installation direction of the corresponding socket bayonet parts 26 on the seat 2 should be horizontal and the direction of the bayonet parts 21a, 21b etc. should be longitudinal. The definition of horizontal and vertical is determined according to the cable groove 28 . As shown in Figure 4, in the meter box/electrical cabinet, only one lead wire 100 is designed, and the rest of the cables 28 are respectively and hung on this lead wire, so it is horizontal, and also normally corresponds to the use direction of Table 1.

As an improvement, the bayonet part has a second bayonet part 26, and correspondingly, the positions of the first and second bayonet parts are orthogonal to each other. In the first embodiment above, the voltage variable signal from the cable slot 28 is obtained through the first bayonet parts 21a and 22a, and the current variable signal from the cable slot 28 is obtained through the first bayonet parts 21b and 22b. Integrating electric power of the single-chip microcomputer; providing DC current to the above-mentioned single-layer circuit board through the second bayonet member 26 . In the second embodiment above, first insert the second plug 16 into the second bayonet member 26 to block the current path in the cable slot 28, and transmit power to (for example) the first bayonet member by turning on the bypass switch 21a, and then provide the induced AC variable to the main body 1 through the first bayonet part 21a.

Preferably, after the plug 16 is inserted into the bayonet part 26, it cannot be taken out normally, as shown in Figure 3, its cross-sectional configuration is different from the bayonet part 21a, etc. At this time, the barb-shaped protruding part 24 of the bayonet piece 21a in the original seat 2 is still on the surface of the seat 2, similar to the bayonet piece 21a, there is also an elastic contact part 261 inside it.

When this elastic contact portion 261 is pressed down, a conductive connector at the bottom of the two bayonet parts 26 (the inside of the seat 2), that is, the extension part in the case of the protruding part 24 will produce a first fracture position 242 or 243 (Fig. 2 or the actions shown in 3). On the one hand, the end portion 241 of the protruding part 24 is a tilted inwardly extending part, which will be stuck in a second breaking position 15 on the body of the watch 1 when fully moved to the P-direction vertical position; on the other hand, Originally, the cable 28 is connected to the bayonet piece 26. When the watch body 1 is plugged in and the first fracture position occurs, the longitudinal path between the two bayonet pieces 26 that were originally orthogonal to the cable 28 is cut off, thereby The bayonet parts 21a, 21b, etc. are made conductive, which can prevent the slot 21a, etc. from being conductively connected.

The second breaking position 15 can be used as a path to disassemble the body 1 during production. In a foreseeable example, the part of the main body 1 below the fracture position 15 can be equipped with a signal acquisition circuit board for dedicated connection to external electrical components, and sampling and parameter calculation of AC signals generated on the electrical circuit. In a general example, multi-layer electrical boards are usually arranged inside the watch, and the display board corresponding to the display section 13 and the communication board corresponding to the communication section 12 can be arranged on the upper side of the plane where the fracture position 15 is located.

In addition, the signal acquisition section 14 inside the meter body 1 can adopt a non-transformer method, such as a patch RC method, and at the same time, other acquisition devices can be installed on the socket 2 instead of the electric meter.

According to the second embodiment of the present invention, each bayonet piece has an elastic contact portion 261 configured to make the hook-shaped protruding portion 24 between the bottoms of the first bayonet piece after being contacted and pressed down by the above-mentioned plug. The extension part produces the first breaking position 242, pushes the end 241 of the hook-shaped protruding part to be hooked into the second breaking position 15 in the above-mentioned body, and cuts off the electrical conduction between the bayonet parts 21a and 22a to prevent the electrical conduction of the cable slot The path is used to form a conductive path between the cable slot and each bayonet piece.

Referring to the cross-sectional view of the socket shown in FIG. 6, in the second embodiment of the present invention, the bayonet mounting plate 23 inside the socket 2 has:

The receiving plate 29 that accepts the second bayonet piece 26 is used to raise the height of the second bayonet piece 26 to be higher than the height of the plane where the first bayonet piece 21a is located, so that the second plug 16 and the second bayonet piece 26 is first contacted; and

The movable connecting plate 292 that is located in the described bearing seat 2 is provided with an elastic conflicting member 295 (such as a spring) between the movable connecting plate 292 and the bottom of the bearing seat 2, so that it has the hook-shaped protruding part 24 between the bottom of the bearing seat 2. The initial position where the extension parts are coplanar, that is, the dotted line position at the top of the seat 2 shown in FIG. The part shown by the solid line in FIG. 6 is the movable structure state in the process of inserting the second plug 16 in the socket 2. The main movable parts in the figure are the above-mentioned movable connecting plate 292 and the hook-shaped protruding part 24 linked therewith.

Preferably, the hook-shaped protruding part 24 is fixed on a threading shaft Z1, so that the hook-shaped protruding part 24 can rotate along the axial direction R1 or R2 with the threading shaft Z1. For example, it can be rotated to any position between the two end positions shown by the dotted line in FIG. 6 . The threading axis Z1 divides the hook-shaped protrusion 24 into a visible part outside the socket 2 and a part extending along the bottom of the socket.

Furthermore, the movable connecting plate 292 has two sliding through slots 294 penetrating in the horizontal plane, and each of the two sliding through slots 294 penetrates a penetrating linkage Axis Z2, this interlocking axis Z2 is to movably fix the end of the hook-shaped protruding part 24 at the bottom extension part of the seat 2 and the movable connecting plate 292 together, as the movable connecting plate 292 is pressed down by the second plug 16, Due to the pulling effect of the interlocking shaft Z2 and the fixed rotation of the hook-shaped protrusion 24 by the threading shaft Z1, the visible part of the hook-shaped protrusion 24 outside the seat 2 can rotate upwards according to the axial direction R1 and finally It is fixed at the second breaking position 15 in the main body 1, and at the same time, the interlocking axis Z2 is limited in the sliding through groove 294, and only along the space of the sliding through groove 294 from the first (or initial) locking position A to the second ( Termination) sliding in locking position B. Simultaneously, the extension part of the hook-shaped protruding part 24 in the original horizontal position into the seat 2 appears a first fracture position 242′. For example, if there is no broken position and the two hook-shaped protruding portions 24 are connected to each other as a straight line (as shown in FIG. 6 ), the wiring groove 28 will be blocked by it and no conductive path will be formed. Preferably, the hook-shaped protruding portion 24 is made of non-conductive material.

In a preferred example, the width of the slot 294 is equal to or slightly larger than the cross-sectional diameter of the linkage shaft 294 .

According to the spirit of this embodiment, due to the function of the elastic conflicting component 295, the above-mentioned linked action can be recovered. That is to say, when the person installing the meter needs to take out the main body 1, the above process is reversible, and the hook-shaped protruding portion 24 will return to the initial horizontal position. At the same time, considering the length of the hook-shaped protruding portion 24 and the margin for deformation, the height of the receiving plate 29 needs to be slightly higher than the surface where other bayonet parts 21 a of the socket 2 are located.

Furthermore, an electrical contact 291 is provided at the bottom of the movable connecting plate 292. When the second plug 16 continues to press down on the movable connecting plate 292 until the penetrating linkage axis Z2 is limited to the second locking position B, the electrical contact 291 is inserted into the cable. The electrical contact in the slot 28 is in the slot 293 , thereby conducting the wiring slot 28 . Moreover, the electrical contact piece 291 is electrically connected to the first bayonet pieces 21a and 22a, so as to conduct the two first bayonet pieces on the input side and the output side in the H direction.

Preferably, the bottom of the movable connecting plate 292 is further provided with a locking hook 296, and the bottom of the seat 2 is provided with a pair of laterally arranged locking movable buttons 299, and the locking movable buttons 299 extend toward the bottom of the seat 2 Each end of each is provided with a locking buckle 297, and the locking hook 296 is engaged with the locking buckle 297, so that the movable connecting plate 292 is locked on the bottom of the seat 2, and then the above-mentioned hook-shaped protruding part 24 is locked. in the second break location 15 .

According to this embodiment, when the installer needs to remove the main body 1, he only needs to press the two snap-lock movable buckles 299 toward the seat, and the movable connecting plate 292 will be loosened and returned to When the initial position is reached, the hook-shaped protruding part 24 is automatically linked to the horizontal position. In a preferred example, in order to make the locking movable buckle 299 have a good contact force, an elastic member 298 can be arranged therebetween to enhance the use effect.

According to the second embodiment of the present invention, the method for loading and unloading this single-phase electric meter includes:

Installation method: Step 1. Provide the main body 1 and the matching seat 2, install a single-layer electrical board in the main body 1, as the metering function part of the meter, set several lead-out terminals from the single-layer electrical board To connect the first plug 11, a slot matching the configuration of the plug is provided in the socket 2, wherein the first bayonet parts 21a to 22b are arranged in the slot, and the main body 1 is pressed down along the P direction to the socket 2, so that the first plug 11 is in complete electrical contact with the first bayonet piece;

Step 2. Press down the elastic contact part 261 provided in the second bayonet part 26 by the second plug 16 (for example), so that the barb-shaped protruding part 241 at the end of the protruding part 24 is on the bottom of the bayonet part 21a on the seat 2 The first breakage position 242 is generated by the extending part between the two sides, and the visible part of the hook-shaped protruding part 24 outside the seat 2 can rotate upwards according to the axial direction R1 and finally be fixed at the second breakage position 15 in the body 1;

Step 3. When the second plug 16 continues to press down on the movable connecting plate 292 until the penetrating linkage axis Z2 is limited to the second latching position B, the electrical contact 291 is inserted into the electrical contact groove 293 in the wiring groove 28, thereby leading Through this cable slot 28, the electrical contact piece 291 is in electrical contact with the first bayonet pieces 21a and 22a, so that the two first bayonet pieces 21a and 22a, or 21b, on the input side and the output side are conducted in the H direction. and 22b;

Step 4. Set a locking buckle 297 at the end of the extending part of the locking movable buckle 299 to the bottom of the seat 2, and the locking hook 296 is snapped to the locking buckle 297, so that the movable connection The plate 292 is locked on the bottom of the seat 2, and a single-layer electric board is fixed in the bottom shell part 17 of the body 1, or a multi-layer electric board is installed according to different needs, and the top shell 18 is installed on the bottom shell 17, and sealed with a lead seal. Fasten;

Disassembly method: step 5, remove the threading lead seal;

Step 6. Remove the mounting plate 25 or at least a part of it, and press the two opposite locking movable buckles 299 toward the direction of the seat 2, and the movable connecting plate 292 will be loosened and will be released by the tension of the elastic conflicting part 295. Returning to the initial position, the hook-shaped protruding part 24 is automatically linked to the horizontal position, so that the above-mentioned body 1 is ejected through the second socket 26 .

Wherein, a locking buckle 297 is provided at the end of the extending part of the locking movable buckle 299 to the bottom of the seat 2, and the locking hook 296 is snapped to the locking buckle 297, so that the movable connecting plate 292 is locked at the bottom of the seat 2 , thereby locking the above-mentioned hook-shaped protruding portion 24 in the second breaking position 15 . If the locking buckle 297 is pressed, the locking hook 296 will be released automatically.

The above are only preferred examples of the present invention, but are not limitations to the technical gist of the present invention, and various implementations may be substituted or preferred. At the same time, methods that are not covered in multiple embodiments of the present invention or their combinations should also belong to the scope of the present invention. For example, the communication circuit 15 can be designed to be external to the main body 1, or the structure of the elastic member 295 or 298 can be changed. Be specific and optimized. The accompanying drawings of the present invention are only for highlighting features and effects, and the actual size or proportion is not completely equal to the physical product, and is only used as a pictorial representation. The claim of the present invention is based on the scope of protection of the appended claims.

Claims (10)

1. close-coupled table, be made up of the mutual split of bearing of body and electrical isolation with it, wherein function of measuring part is arranged in described body, and described body is connected in the corresponding slot of outside bearing by the plug plug-in that its dorsal part is arranged, it is characterized in that, described bearing has:

Be undertaken in the transformer component between electric network power line and user load, it is electrically connected on described slot, the ac signal variable quantity in the induced electricity line of force; And connect the power-supply circuit of described transformer component, for line of electric force convert alternating current is supplied to above-mentioned body to direct current by described slot;

Described function of measuring part only has:

Sample circuit, to be electrically connected in described plug at least partially, and electric current and the voltage signal of the described body alternating current line of force are introduced in induction; Metering circuit, connects described sample circuit to read electric current and voltage signal carries out integral operation; Single-chip microcomputer, the metering circuit described in electrical couplings is to process described integral operation value; Be electrically connected the communicating circuit of described single-chip microcomputer; And DC transfer circuit, the DC power conversion provided from described slot is become the operating voltage of the described single-chip microcomputer of supply and communicating circuit.

2. close-coupled table according to claim 1, is characterized in that, described plug has separate setting:

First plug, for obtaining electric current and voltage signal from the above-mentioned slot of a part; And

Second plug, for obtaining power supply direct current from the above-mentioned slot of another part.

3. close-coupled table according to claim 2, it is characterized in that, in at least part of slot, be provided with bayonet socket part, described bayonet socket part is made up of the input side bayonet socket part arranged in pairs and outgoing side bayonet socket part, and wherein said bayonet socket part is inlaid in the corresponding bayonet socket installing plate in described slot.

4. close-coupled table according to claim 3, is characterized in that, bayonet socket part described in each has a hook-shaped outshot, snaps in described body for being arranged in bearing at described body after correct position.

5. electric plug-in metering outfit, be made up of body and the mutual split of bearing, wherein electric function part is arranged in described body, and described body is connected in the corresponding slot of outside bearing by the plug plug-in that its dorsal part is arranged, it is characterized in that, described bearing has:

Winding displacement groove, for forming electricity-led path between electric network power line and user load; And the transformer component be arranged on this winding displacement groove, it is electrically connected on described slot, the ac signal variable quantity in the induced electricity line of force;

Described electric function part has:

Power-supply circuit, obtains alternating current on above-mentioned electrically conductive path to be converted into direct current by described plug; Sample circuit, is electrically connected to described plug, and electric current and the voltage signal of the described electric plug-in metering outfit body alternating current line of force are introduced in induction; Metering circuit, connects described sample circuit to read electric current and voltage signal carries out integral operation; Single-chip microcomputer, the metering circuit described in electrical couplings is to process described integral operation value; And be electrically connected the communicating circuit of described single-chip microcomputer.

6. electric plug-in metering outfit according to claim 5, is characterized in that, described plug has separate setting:

First plug, for obtaining alternating current from the above-mentioned slot of a part; And

Second plug, for blocking at least part of conductive path of winding displacement groove in described bearing.

7. electric plug-in metering outfit according to claim 6, it is characterized in that, bayonet socket part is provided with at least part of slot, described bayonet socket part is made up of with the outgoing side bayonet socket part being connected power grid user load end the input side bayonet socket part of the connection grid power line end arranged in pairs, and wherein said bayonet socket part is inlaid in the corresponding bayonet socket installing plate in described slot.

8. electric plug-in metering outfit according to claim 7, is characterized in that, bayonet socket part described in each has a hook-shaped outshot, snaps in described body for being arranged in bearing at described body after correct position.

9. electric plug-in metering outfit according to claim 8, it is characterized in that, described in each, bayonet socket part has elastic contact part again, is configured to:

By above-mentioned Plug contact and make after pressing down described hook-shaped outshot bottom bayonet socket part between extension produce the first fracture position, promote described hook-shaped outstanding hook segment and be stuck in above-mentioned intrinsic second fracture position; And

Cut off between bayonet socket part and stop that the path of winding displacement groove electrically conducting is to form conductive path by between described winding displacement groove and each bayonet socket part.

10. electric plug-in metering outfit according to claim 5, it is characterized in that, the installing plate of described bearing extend to again another bearing at least partially in, wherein said bayonet socket installing plate is fixed after mutually being spliced by the Contact Boundary of two bearings.