Single-phase meter

Abstract

The utility model provides a single-phase meter, and relates to the technical field of electric energy meters. The single-phase meter comprises: a housing; the electric meter body is arranged in the shell, and the electric meter body is provided with a connecting terminal; the strong current terminal seat is detachably connected with the shell, and a strong current terminal is arranged in the strong current terminal seat; and the conductive piece is detachably connected with the strong current terminal and the connecting terminal respectively, so that the strong current terminal is electrically connected with the connecting terminal, and therefore, when the strong current terminal is burnt out, the strong current terminal can be directly replaced without replacing the whole meter, and the maintenance cost of the single-phase meter is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric energy meter, in particular to a single-phase meter. BACKGROUND

[0002] The single-phase meter is a kind of electric meter for measuring single-phase alternating current energy consumption, and is usually used in homes and small commercial places.

[0003] The single-phase meter includes a single-chip microcomputer, a sampling metering unit and a wiring terminal, and the single-chip microcomputer, the sampling metering unit and the wiring terminal are fixed in a shell, wherein the wiring terminal includes a weak current terminal, a strong current terminal and a connecting terminal, the connecting terminal is connected with the single-chip microcomputer and other components through a wire, the strong current terminal is connected with the connecting terminal, and the strong current terminal is used to connect high-voltage and large-current wires to enable the single-phase meter to collect voltage signals and current signals.

[0004] However, most of the time when the single-phase meter fails, the strong current terminal of the single-phase meter is burned out, at this time, the single-chip microcomputer and other components in the single-phase meter are not damaged, and due to the setting mode of the strong current terminal, the single-phase meter as a whole still needs to be replaced, which is high in cost. CONTENT OF THE UTILITY MODEL

[0005] The present application provides a single-phase meter to solve the problem of high cost of replacing the whole meter when the strong current terminal of the single-phase meter is damaged.

[0006] The present application provides a single-phase meter, comprising:

[0007] a shell;

[0008] an electric meter body, the electric meter body is arranged in the shell, and the electric meter body has a connecting terminal;

[0009] a strong current terminal seat, the strong current terminal seat is detachably connected with the shell, and the strong current terminal seat is provided with a strong current terminal;

[0010] a conductive piece, the conductive piece is detachably connected with the strong current terminal and the connecting terminal to electrically connect the strong current terminal and the connecting terminal.

[0011] In some embodiments of the present application, the conductive piece is a conductive copper sheet.

[0012] In some embodiments of the present application, the conductive copper sheet includes an independent phase line copper sheet and a zero line copper sheet, the phase line copper sheet is used to connect the phase line of the strong current terminal and the connecting terminal, and the zero line copper sheet is used to connect the zero line of the strong current terminal and the connecting terminal.

[0013] In some embodiments of the present application, the shell is sequentially provided with a main cavity, a transition cavity and a connecting cavity from top to bottom, the electric meter body is located in the main cavity, the strong current terminal seat is detachably arranged in the connecting cavity, and the strong current terminal at least partially extends into the transition cavity.

[0014] The two ends of the conductive member are respectively located in the transition cavity and the main cavity to be connected with the strong current terminal and the connecting terminal respectively.

[0015] In some embodiments of the present application, a clamping groove is arranged on the cavity wall between the main cavity and the transition cavity, and the conductive member is partially clamped in the clamping groove.

[0016] In some embodiments of the present application, a cover plate connected with the shell is further included, the connecting terminal is located on the side adjacent to the main cavity and the transition cavity, the cover plate covers the area corresponding to the main cavity and the connecting terminal, and the cover plate covers the transition cavity and the connecting cavity.

[0017] In some embodiments of the present application, the cover plate is a transparent plate.

[0018] In some embodiments of the present application, the cover plate is hingedly connected with the shell.

[0019] In some embodiments of the present application, a first lock body is arranged on the movable end of the cover plate, and a second lock body matched with the first lock body is arranged on the shell, so that the movable end of the cover plate is locked on the shell through cooperation of the first lock body and the second lock body.

[0020] In some embodiments of the present application, the cover plate is connected with the shell through bolts.

[0021] The single-phase meter provided by the present application is provided with a shell, an electric meter body, a strong current terminal seat and a conductive member. The electric meter body includes a connecting terminal arranged in the shell, the strong current terminal seat is detachably connected with the shell, the strong current terminal is arranged in the strong current terminal seat and connected with the connecting terminal through the conductive member, so that the strong current terminal and the connecting terminal are not in direct contact. When the strong current terminal of the single-phase meter is damaged, the conductive member and the strong current terminal can be separated, and the damaged strong current terminal can be replaced. At this time, whether the strong current terminal seat is detached or not can be selected according to the situation. After the new strong current terminal is replaced, the conductive member is connected with the strong current terminal and the connecting terminal, and the single-phase meter can be put into use. Compared with the traditional single-phase meter, when the strong current terminal fails, the single-phase meter does not need to be replaced, and the other undamaged components can be reused, which can effectively reduce the maintenance cost of the single-phase meter. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate embodiments consistent with the application and, together with the description, further serve to explain the principles of the application.

[0023] Figure 1 An internal structure diagram of a single-phase meter provided for an embodiment of the application;

[0024] Figure 2 A structure diagram of a single-phase meter provided for an embodiment of the application.

[0025] Legend of reference signs:

[0026] 100 - housing;

[0027] 110 - main cavity;

[0028] 120 - transition cavity;

[0029] 130 - connection cavity;

[0030] 200 - meter body;

[0031] 210 - connection terminal;

[0032] 300 - strong current terminal seat;

[0033] 310 - strong current terminal;

[0034] 400 - conductive member;

[0035] 500 - cover plate.

[0036] By means of the above drawings, the explicit embodiments of the application have been shown, and will be described in more detail hereinafter. These drawings and the written description are not intended to restrict the scope of the concept of the application by any means, but to illustrate the concept of the application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0037] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The description of the exemplary embodiments is intended to apply to various alternative embodiments of the application. It is to be understood that features illustrated or described as part of one embodiment can be provided with one or more of the other embodiments as well. Variations to the embodiments can become apparent to those of ordinary skill in the art once the concepts of the application are understood. The following detailed description is, therefore, not to be taken in a limiting sense, as the scope of the application is defined by the appended claims and equivalents thereof.

[0038] It should be noted that all the direction indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the direction indications will also change accordingly.

[0039] In the present application, unless specifically defined and limited otherwise, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In addition, if the present application has a description of "first", "second", etc., the description of "first", "second", etc. is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. For example, "A and / or B" includes A solution, or B solution, or A and B solution. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection claimed by the present application.

[0041] The single-phase meter is a kind of instrument for measuring the power consumption in single-phase alternating current circuit, which mainly includes shell, single-chip microcomputer, communication module, display screen, sampling measurement unit, single-chip microcomputer, wiring terminal and other components.

[0042] Among them, the shell is the external protective structure of the single-phase meter, which is usually made of insulating material. The shell can protect other components inside it from physical damage and environmental influences such as moisture and dust.

[0043] The single-chip microcomputer is the "brain" of the single-phase meter, which is responsible for processing sampling data, performing calculations, controlling display and communication functions, i.e. the single-chip microcomputer can receive signals from the sampling measurement unit, process data and calculate power, and display the results on the display screen or transmit them to the upper computer.

[0044] The sampling metering unit is responsible for converting high voltage and large current in the power grid into low voltage and small current signals that can be processed by electronic circuits, thereby providing accurate voltage and current signals to the single-chip microcomputer for calculation, such as converting high voltage of tens of volts or hundreds of volts into low voltage of tens of millivolts to several volts that can be processed by electronic circuits, and converting large current of several amperes to tens of amperes into small current of several milliamperes that can be processed by electronic circuits. The sampling metering unit can include a voltage transformer, a current transformer, or a direct sampling circuit (such as a resistance voltage division network and a manganese copper sheet), etc.

[0045] Specifically, there are mainly two forms of sampling of the sampling metering unit. One is transformer sampling, in which the sampling metering unit includes a voltage transformer and a current transformer. The voltage transformer works on the principle of electromagnetic induction and is used to convert high voltage into low voltage to collect the voltage signal of the user. The current transformer converts large current into small current based on the principle of electromagnetic induction to collect the current signal of the user.

[0046] The other sampling method is direct sampling, in which the sampling metering unit includes a direct sampling circuit. The direct sampling circuit converts high voltage into low voltage through a resistance voltage division network with high thermal stability to collect the voltage signal of the user, and converts large current into small current through a manganese copper sheet with very small resistance temperature coefficient to collect the current signal of the user.

[0047] The connection terminal includes a weak current terminal, a strong current terminal, and a connection terminal.

[0048] The strong current terminal is used to connect the high voltage and large current power line, and is usually used to input the electrical energy from the power source to the single-phase meter and output the metered electrical energy to the user load. It usually includes a phase line / live line input terminal connected to the power source, a phase line / neutral line input terminal connected to the load, and a neutral line terminal connected to the power source and the load.

[0049] The weak current terminal is used to process low voltage and small current signals, and is usually related to the electronic circuit and communication module inside the single-phase meter, and is used for transmitting control signals and data communication, etc. The weak current terminal and the strong current terminal need to be effectively isolated to prevent high voltage from interfering with the low voltage circuit.

[0050] The connection terminal is used to transmit the current and voltage signals to the single-chip microcomputer through the measurement circuit for measurement and processing.

[0051] The utility model discloses a single-phase meter, which comprises a shell, a single-chip microcomputer, a sampling metering unit, a weak current terminal, a strong current terminal and a connection terminal.

[0052] To this end, the embodiment of the present application provides a single-phase meter, which separates the strong current terminal and the weak current terminal, and connects the strong current terminal with the connecting terminal through the conductive part. When the strong current terminal is burnt out, the strong current terminal can be directly replaced without replacing the whole meter, thereby effectively reducing the maintenance cost of the single-phase meter.

[0053] The technical solutions of the present application and how the technical solutions solve the above technical problems will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described again in some embodiments. The embodiments of the present application will be described below with reference to the drawings.

[0054] Figure 1 The internal structure schematic diagram of the single-phase meter provided by the embodiment of the present application is shown in the figure. Figure 2 The structure schematic diagram of the single-phase meter provided by the embodiment of the present application is shown in the figure.

[0055] In some embodiments, referring to Figure 1 As shown in the figure, the single-phase meter includes a shell 100, a meter body 200, a strong current terminal seat 300 and a conductive part 400.

[0056] The meter body 200 includes core metering and display components such as power supply modules, single-chip microcomputers, sampling metering units, communication modules, output modules and other components. The power supply module is used for power supply, and the output module can be a liquid crystal display or a light-emitting diode display which can convert electrical signals into readable numerical values for display.

[0057] The meter body 200, i.e. the power supply module, the single-chip microcomputer, the sampling metering unit, the communication module, the output module and other components are arranged in the shell 100. The meter body 200 also has a connecting terminal 210. The strong current terminal seat 300 is provided with a strong current terminal 310. The strong current terminal 310 is connected with the connecting terminal 210 through the conductive part 400. The current and voltage signals of the strong current terminal 310 are transmitted to the meter body 200 through the connecting terminal 210 for measurement and processing.

[0058] The connecting terminal 210 can be a copper sheet, or other conductive connecting sheet or connecting column structure. Correspondingly, the conductive part 400 can also be a conductive connecting sheet or connecting column, as long as it can connect the connecting terminal 210 and the strong current terminal 310.

[0059] The strong current terminal seat 300 is detachably connected with the shell 100, which can be connected by bolts or other common connection methods such as clamping, as long as the strong current terminal seat 300 and the shell 100 will not be separated during use. The present embodiment does not limit this.

[0060] By setting the ammeter body 200, the strong current terminal seat 300 and the conductive piece 400, the ammeter body 200 includes the connecting terminal 210 arranged in the shell 100, the strong current terminal seat 300 is detachably connected with the shell 100, the strong current terminal 310 is arranged in the strong current terminal seat 300 and connected with the connecting terminal 210 through the conductive piece 400, so that the strong current terminal 310 and the connecting terminal 210 are no longer in direct contact. When the strong current terminal 310 of the single-phase meter is damaged, the conductive piece 400 and the strong current terminal 310 can be separated, the damaged strong current terminal 310 can be replaced, at this time, whether to disassemble the strong current terminal seat 300 can be selected according to the situation, after replacing the new strong current terminal 310, the conductive piece 400 is connected with the strong current terminal 310 and the connecting terminal 210, and then it can be put into use.

[0061] Compared with the traditional single-phase meter, when the strong current terminal 310 fails, the single-phase meter does not need to be replaced, and the other undamaged components can be reused, which can effectively reduce the maintenance cost of the single-phase meter.

[0062] In some possible embodiments, the conductive piece 400 is a conductive copper sheet.

[0063] Specifically, the conductive copper sheet has excellent conductivity and mechanical properties, is very suitable for current conduction, can reduce power loss, and can achieve efficient current transmission effect.

[0064] At the same time, in order to facilitate disassembly and installation, the strong current terminal 310 and the connecting terminal 210 can be made of copper sheets.

[0065] Corresponding connecting holes are arranged on the connecting terminal 210, the strong current terminal 310 and the conductive copper sheet. During installation, the connecting holes at both ends of the conductive copper sheet are opposite to the connecting holes on the strong current terminal 310 and the connecting terminal 210, and then the connection between the strong current terminal 310 and the connecting terminal 210 can be realized by locking through bolts.

[0066] In some possible embodiments, the conductive copper sheet includes an independent phase copper sheet and a zero copper sheet. The phase copper sheet is used to connect the phase line of the strong current terminal 310 and the connecting terminal 210, and the zero copper sheet is used to connect the zero line of the strong current terminal 310 and the connecting terminal 210.

[0067] It can be understood that the thickness and width of the phase copper sheet and the zero copper sheet can be designed according to the current density and heat dissipation requirements, and during installation, the phase copper sheet and the zero copper sheet maintain appropriate spacing to prevent short circuit or arc, therefore, the shape and specific arrangement position of the phase copper sheet can be adjusted according to actual conditions, which is not limited in the embodiment.

[0068] In addition, in order to improve the use effect, the surface of the phase copper sheet and the zero copper sheet can be subjected to tin plating or nickel plating treatment to improve corrosion resistance and contact performance.

[0069] In some possible embodiments, the shell 100 is sequentially provided with a main cavity 110, a transition cavity 120 and a connection cavity 130 from top to bottom, the ammeter body 200 is located in the main cavity 110, the strong current terminal seat 300 is detachably arranged in the connection cavity 130, and the strong current terminal 310 at least partially extends into the transition cavity 120.

[0070] The two ends of the conductive piece 400 are respectively located in the transition cavity 120 and the main cavity 110 to be connected with the strong current terminal 310 and the connection terminal 210 respectively.

[0071] By dividing the shell 100 into the main cavity 110, the transition cavity 120 and the connection cavity 130, modular design can be realized, thereby facilitating manufacturing, assembly and maintenance, and making replacement and maintenance of the strong current terminal seat 300 more convenient and reducing maintenance cost.

[0072] Meanwhile, the strong current terminal 310 and the ammeter body 200 are arranged in different cavities and connected through the conductive piece 400 and the transition cavity 120, so that the weak current terminals in the strong current terminal 310 and the ammeter body 200 can be effectively isolated to reduce electromagnetic interference and reduce the risk of electrical short circuit and arc generation, thereby improving the safety of the single-phase ammeter.

[0073] In some possible embodiments, a clamping groove is arranged on the cavity wall between the main cavity 110 and the transition cavity 120, and the conductive piece 400 is partially clamped in the clamping groove.

[0074] Specifically, the clamping groove is arranged on the partition plate separating the main cavity 110 and the transition cavity 120, and the clamping groove is recessed away from the conductive piece 400. When the strong current terminal 310 and the connection terminal 210 are connected through the conductive piece 400, the part of the conductive piece 400 corresponding to the partition plate can be inserted into the clamping groove, so that the conductive piece 400 does not protrude outward and space is saved.

[0075] Meanwhile, the shape of the clamping groove can be adapted to the shape of the conductive piece 400. When the conductive piece 400 is inserted into the clamping groove, the clamping groove can position the conductive piece 400 to prevent the conductive piece 400 from shaking, reduce the torque of the bolts fixing the conductive piece 400, the connection terminal 210 and the strong current terminal 310 in the later use process, improve the fixing effect of the conductive piece 400, and thereby improve the stability of the single-phase ammeter in use.

[0076] In some possible embodiments, please refer to Figure 2As shown, the single-phase meter further comprises a cover plate 500 connected to the shell 100, the connection terminal 210 is located at the side of the main cavity 110 adjacent to the transition cavity 120, the cover plate 500 covers the area corresponding to the main cavity 110 and the connection terminal 210, and the transition cavity 120 and the connection cavity 130.

[0077] Specifically, the area covered by the cover plate 500 is the entire transition cavity 120 and the connection cavity 130, and the part of the main cavity 110 adjacent to the transition cavity 120, that is, the area covered by the cover plate 500 is mainly for the area where the strong current terminal 310 and the conductive part 400 are located.

[0078] When the strong current terminal 310 is burned out, the cover plate 500 can be directly opened to replace the damaged part without disassembling the entire single-phase meter, further improving the convenience of maintenance.

[0079] Among them, the connection between the cover plate 500 and the shell 100 only needs to ensure that the cover plate 500 can be opened when needed.

[0080] Exemplarily, the cover plate 500 and the shell 100 are connected by bolts, that is, threaded holes are opened at the corresponding positions of the cover plate 500 and the shell 100, and then the cover plate 500 is locked on the bolts by the bolts.

[0081] Exemplarily, the cover plate 500 and the shell 100 are connected by a hinge, that is, the top of the cover plate 500 (the end connected to the main cavity 110) is connected to the shell 100 by a hinge, and the bottom of the cover plate 500 is a movable end, so that the cover plate 500 can rotate around the hinge point to open or close the cover plate 500.

[0082] Among them, in order to avoid the cover plate 500 being directly opened during use, the movable end of the cover plate 500 can be clamped with the shell 100.

[0083] In addition, a first lock body can be provided at the movable end of the cover plate 500, and a second lock body can be provided on the shell 100, the first lock body and the second lock body can be one of a lock body and a lock catch, and the two functionally cooperate to realize the locking and unlocking of the cover plate 500.

[0084] The lock body comprises a lock cylinder and a lock tongue, when the cover plate 500 needs to be locked, the lock tongue extends out of the lock body and is inserted into the lock cylinder, and when the cover plate 500 needs to be opened, the lock tongue can be retracted from the lock catch by a key, thereby opening the cover plate 500 and improving the safety of the single-phase meter.

[0085] In some possible embodiments, the cover plate 500 is a transparent plate.

[0086] Exemplarily, the cover plate 500 can be a PMMA (polymethyl methacrylate) plate, which has the advantages of light weight, high transparency, good weather resistance and easy processing.

[0087] Exemplarily, the cover plate 500 can be a PC (polycarbonate) plate, which has the advantages of high impact resistance, high transparency and good heat resistance.

[0088] Exemplarily, the cover plate 500 can be a PVC (polyvinyl chloride) plate, which has the advantages of good transparency and low cost.

[0089] Exemplarily, the cover plate 500 can be a PS (polystyrene) plate, which has the advantages of high transparency, low cost and easy processing.

[0090] It can be understood that the cover plate 500 can also be made of other common transparent materials, such as glass, as long as it is transparent, insulated and can meet the use requirements of the single-phase panel. The present embodiment is not limited thereto.

[0091] In use, the user can directly observe the condition of the strong current terminal 310 and the conductive part 400 through the cover plate 500. Once the strong current terminal 310 is found to be burnt out, the cover plate 500 can be opened to replace it, thereby further improving the convenience of use.

[0092] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the present application cover any and all variations of the application that come within the scope of the claims and their equivalents. It is intended that the specification and examples be considered exemplary only, with the true scope and spirit of the application indicated by the following claims.

[0093] It should be understood that the application is not limited to the precise construction that has been described above and illustrated in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application should be limited only by the appended claims.

Claims

1. A single phase meter, characterized by, The utility model relates to an electric meter, including: A shell (100); An electric meter body (200) arranged in the shell (100), the electric meter body (200) has a connection terminal (210); A strong current terminal seat (300) detachably connected with the shell (100), the strong current terminal seat (300) is provided with a strong current terminal (310) in it; A conductive piece (400) detachably connected with the strong current terminal (310) and the connection terminal (210) respectively, so that the strong current terminal (310) and the connection terminal (210) are electrically connected.

2. The single phase meter of claim 1, wherein, The conductive piece (400) is a conductive copper sheet.

3. The single phase meter of claim 2 wherein, The conductive copper sheet includes independent phase copper sheets and zero copper sheets, the phase copper sheets are used for connecting phase lines of the strong current terminal (310) and the connection terminal (210), and the zero copper sheets are used for connecting zero lines of the strong current terminal (310) and the connection terminal (210).

4. The single phase meter of any one of claims 1-3, wherein, The shell (100) is sequentially provided with a main cavity (110), a transition cavity (120) and a connecting cavity (130) from top to bottom, the electric meter body (200) is located in the main cavity (110), the strong current terminal seat (300) is detachably arranged in the connecting cavity (130), and the strong current terminal (310) at least partially extends into the transition cavity (120); Two ends of the conductive piece (400) are located in the transition cavity (120) and the main cavity (110) respectively to be connected with the strong current terminal (310) and the connection terminal (210) respectively.

5. The single-phase meter of claim 4, wherein, A clamping groove is arranged on a cavity wall between the main cavity (110) and the transition cavity (120), and the conductive piece (400) is partially clamped into the clamping groove.

6. The single-phase meter of claim 4 wherein, Further including a cover plate (500) connected with the shell (100), the connection terminal (210) is located on a side adjacent to the main cavity (110) and the transition cavity (120), the cover plate (500) is arranged on an area corresponding to the main cavity (110) and the connection terminal (210), and the transition cavity (120) and the connecting cavity (130).

7. The single-phase meter of claim 6, wherein, The cover plate (500) is a transparent plate.

8. The single-phase meter of claim 6, wherein, The cover plate (500) is hingedly connected with the shell (100).

9. The single-phase meter of claim 8 wherein, A first lock body is arranged on a movable end of the cover plate (500), a second lock body matched with the first lock body is arranged on the shell (100), and the movable end of the cover plate (500) is locked on the shell (100) through cooperation of the first lock body and the second lock body.

10. The single-phase meter of claim 6, wherein, The cover plate (500) is connected with the shell (100) through bolts.

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