A device for calibrating an electric meter

Abstract

The utility model discloses a kind of electric meter verification devices, it includes rack and multiple hanging meter surface plate, rack has installation part and first installation structure, first installation structure is located in installation part;Each hanging meter surface plate has hanging meter seat and second installation structure, and the detection probe of the hanging meter seat of different kinds of hanging meter surface plate is matched with the interface of different electric meter to be measured;First installation structure is used to cooperate with the second installation structure of any one hanging meter surface plate and fix hanging meter surface plate and installation part, to detect corresponding electric meter to be measured.The utility model is modularized combination by rack and hanging meter surface plate, so that the same rack can be compatible with multiple electric meters, and only need to replace hanging meter surface plate when replacing detection object, avoid the resource waste caused by repeated purchase of multiple equipment.

Description

Technical Field

[0001] This utility model relates to the field of electricity meter calibration technology, and in particular to an electricity meter calibration device. Background Technology

[0002] In the field of electricity metering equipment testing, the equipment under test is mainly divided into State Grid single-phase and three-phase electricity meters and terminals, and China Southern Power Grid single-phase and three-phase electricity meters and terminals. In related technologies, the testing devices adopt a dedicated meter-specific design, with each testing bench only compatible with a specific model of the meter being tested. For example, State Grid single-phase and three-phase electricity meters and China Southern Power Grid terminal equipment require different testing benches, resulting in users needing to purchase multiple sets of equipment simultaneously. When the testing task involves multiple meter types, the equipment idle rate increases, resources are wasted significantly, and equipment procurement and maintenance costs increase. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an electricity meter calibration device. The frame of the calibration device is compatible with various types of electricity meters, and only the mounting plate needs to be replaced when changing the meter being tested, thus avoiding the waste of resources caused by repeatedly purchasing multiple devices.

[0004] In a first aspect, embodiments of this application provide an electricity meter calibration device, comprising:

[0005] A frame having a mounting section and a first mounting structure, wherein the first mounting structure is disposed in the mounting section;

[0006] Multiple types of mounting plates are available, each of which has a mounting base and a second mounting structure. The detection probes of the mounting bases of different types of mounting plates are matched with the interfaces of different meters under test.

[0007] The first mounting structure is used to cooperate with any of the second mounting structures of the mounting surface plate and fix the mounting surface plate and the mounting part to detect the corresponding meter under test.

[0008] The meter calibration device according to the embodiments of this utility model has at least the following beneficial effects: The frame serves as the basic support structure. When a specific type of meter needs to be tested, the operator selects the corresponding interface mounting plate and installs it onto the mounting part of the frame. Through the modular combination of the frame and the mounting plate, the first mounting structure cooperates with the second mounting structure with different mounting plates, enabling the same frame to be compatible with multiple types of meters. When changing the meter being tested, only the mounting plate needs to be replaced, avoiding the waste of resources caused by repeatedly purchasing multiple devices.

[0009] According to the first aspect, in one possible implementation, a mounting surface is formed on one side of the mounting portion, the mounting portion includes a support step protruding from the mounting surface, and the hanging surface plate is supported by the support step and fits against the mounting surface.

[0010] According to the first aspect, in one possible implementation, the mounting surface is inclined in a first direction along a vertically upward direction, the first direction being opposite to the protruding direction of the supporting step.

[0011] According to the first aspect, in one possible implementation, a limiting groove is provided on one side of the mounting part, and the hanging surface plate is disposed in the limiting groove; the side wall opposite to the opening of the limiting groove forms the mounting surface, and the side wall at the bottom of the limiting groove forms the supporting step.

[0012] According to the first aspect, in one possible implementation, the first mounting structure includes a first mounting hole formed in the mounting portion, and the second mounting structure includes a second mounting hole formed in the hanging surface plate; the meter calibration device further includes a fastener that passes through the second mounting hole and is threadedly connected to the first mounting hole.

[0013] According to the first aspect, in one possible implementation, the frame has an operating port on the side opposite to the hanging surface plate, and the meter calibration device further includes a sealing plate, which is detachably connected to the frame to close the operating port.

[0014] According to the first aspect, in one possible implementation, the second mounting structure is connected to the first mounting structure by a fastener, the end of which is located on the side of the hanging surface plate opposite to the mounting portion; and / or,

[0015] The mounting section has a wiring space inside. The side of the mounting plate opposite to the meter under test is provided with a conductive terminal that is electrically connected to the mounting plate. When the mounting plate is connected to the mounting section, the conductive terminal extends into the wiring space. At least part of the operating port is connected to the wiring space. The conductive terminal is electrically connected to the power supply component located inside the frame through a wire.

[0016] According to the first aspect, in one possible implementation, the rack includes a cabinet, the mounting part is connected to the cabinet, and a power supply component is provided inside the cabinet for supplying power to the meter holder.

[0017] According to the first aspect, in one possible implementation, the mounting section has multiple mounting areas, the hanging surface plate includes multiple sub-hanging surface plates, and each mounting area is provided with one of the sub-hanging surface plates; and / or,

[0018] The rack includes at least two sub-racks, which are arranged sequentially in a horizontal direction, and any two adjacent sub-racks can be detachably connected.

[0019] According to the first aspect, in one possible implementation, the mounting plate includes a plate body, a pressure gauge handle, and a pressure gauge holder; the plate body is detachably connected to the frame, the plate body has multiple inspection positions, each inspection position is provided with the pressure gauge handle and the pressure gauge holder, and the pressure gauge handle and the pressure gauge holder corresponding to the same inspection position are arranged opposite to each other in the vertical direction.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 This is a schematic diagram of the structure of the meter calibration device from one perspective in one embodiment of the present invention;

[0023] Figure 2 This is a front structural diagram of the meter calibration device in one embodiment of the present invention;

[0024] Figure 3 This is a front view of the meter calibration device in another embodiment of the present invention.

[0025] Figure 4 This is a schematic diagram of the internal structure of the meter calibration device in one embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the disassembly structure of the frame in one embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the frame from one perspective in one embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the back structure of the meter calibration device in one embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the structure of the hanging surface plate in one embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of the cooperation structure between the pressure gauge handle and the meter under test in one embodiment of the present invention.

[0031] Figure label:

[0032] 100. Frame; 100a. Sub-frame; 110. Mounting section; 111. Mounting surface; 112. Support step; 113. Limiting groove; 120. Cabinet; 121. Operating platform; 130. Operating port; 140. Decorative component; 150. First mounting structure;

[0033] 200. Hanging surface plate; 210. Hanging gauge base; 220. Conductive terminal; 230. Plate body; 240. Pressure gauge handle; 241. Mounting base; 2411. Support plate; 242. Pressing handle; 243. Transmission link; 244. Sliding link; 245. Pressure block; 250. Second mounting structure;

[0034] 300. Power supply components;

[0035] 400, sealing plate;

[0036] 500. The meter to be tested. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0038] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0040] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0041] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] In existing technologies, meter calibration devices typically employ a fixed structure design with dedicated meters and mounting locations. Different interface types of meters require matching specialized testing equipment. For example, State Grid single-phase and three-phase electricity meters and Southern Power Grid terminal equipment require different testing benches, necessitating the purchase of multiple sets of equipment by users. When the testing task involves multiple meter types, equipment idle rates increase, resources are wasted significantly, and equipment procurement and maintenance costs are also increased.

[0043] To address the aforementioned problems, this application proposes a meter calibration device. In some embodiments, such as Figure 1 and Figure 2 As shown, the meter calibration device includes a frame 100 and various mounting plates 200. The frame 100 is a rigid frame structure that supports the mounting plates 200 and provides testing functionality. Specifically, it can be implemented using a welded metal frame or a modular profile bracket. The frame 100 has a mounting section 110, which provides a stable mounting base for the mounting plates 200. The mounting plates 200 are functional modules that can be detachably mounted on the frame 100. Each mounting plate 200 has a mounting base 210. The testing probes of the mounting bases 210 of different types of mounting plates 200 are matched with the interfaces of different meters 500 under test; for example... Figure 2 and Figure 3 As shown, the mounting part 110 can be connected to different mounting surface plates 200 to detect the corresponding meter under test 500.

[0044] In this embodiment, as Figures 1 to 3As shown, the frame 100 serves as the basic support structure and is connected to different mounting plates 200 via the mounting section 110. When a specific type of meter needs to be tested, the operator selects the mounting plate 200 with the corresponding interface and installs it onto the mounting section 110. The mounting base 210 of the mounting plate 200 is pre-configured with the arrangement and size of the test probes according to the target meter interface. The frame 100 integrates a universal test circuit. After the mounting plate 200 is installed, the test probes are connected to the test circuit through the signal path inside the frame 100. During the test, the meter 500 under test is fixed on the mounting base 210, the probes contact the meter interface to form a test circuit, the frame 100 executes the preset test program and outputs the results. This application, through the modular combination of the frame 100 and the mounting plate 200, enables the same mounting section 110 to be compatible with multiple meters. When changing the test object, only the mounting plate 200 needs to be replaced, avoiding the waste of resources caused by repeatedly purchasing multiple devices.

[0045] Furthermore, when a new testing requirement for the meter 500 is proposed, the testing function can be adjusted and upgraded simply by redesigning the testing structure on the mounting plate 200.

[0046] The meter mount 210 refers to the connecting component fixed on the mounting plate 200 for positioning the meter under test 500. Specifically, it can be implemented using a probe base with an elastic clamping structure. The test probe refers to the conductive contact set on the meter mount 210, which can be implemented using spring pins or plug-in terminals. The probe arrangement is configured according to different meter interface types to ensure signal transmission matching. The meter mount can be a single-phase meter mount 210, a terminal meter mount 210, a standard three-phase meter mount 210, or a direct inductance compatible three-phase meter mount 210. Of course, other types of meter mounts 210 can also be used according to actual verification requirements; this application does not limit this.

[0047] Specifically, such as Figure 6 As shown, the mounting part 110 is provided with a first mounting structure 150, such as... Figure 8 As shown, each mounting surface panel 200 is provided with a second mounting structure 250, such as... Figure 2 , Figure 3 , Figure 6 and Figure 8 As shown, the first mounting structure 150 is used to cooperate with the second mounting structure 250 of any type of hanging surface panel 200 to fix the hanging surface panel 200 and the mounting part 110. The first mounting structure 150 serves as a standard connection structure, and the second mounting structures 250 on various hanging surface panels 200 are consistent, that is, various hanging surface panels 200 can be fixed to the mounting part 110 in the same way, thereby reducing the structural complexity of the mounting part 110.

[0048] In some embodiments, the first mounting structure 150 may be a first mounting hole formed in the mounting portion 110, and the second mounting structure 250 may be a second mounting hole formed in the hanging surface plate 200. The first mounting structure 150 and the second mounting structure 250 are engaged by fasteners. Specifically, the fasteners may pass through the second mounting hole and be threadedly connected to the first mounting hole, thereby maintaining the connection stability between the hanging surface plate 200 and the mounting portion 110 when locked. When it is necessary to replace the hanging surface plate 200, the hanging surface plate 200 can be disengaged from the mounting portion 110 by removing the fasteners.

[0049] Of course, in other embodiments, the first mounting structure 150 and the second mounting structure 250 can also be fixed by means of hook and hole cooperation, snap-fit ​​cooperation, etc., and this application does not limit this. Furthermore, the second mounting structures 250 on various hanging surface plates 200 can also be different, thus requiring multiple first mounting structures 150 to be provided on the mounting part 110, so that different first mounting structures 150 can be used to cooperate and fix with different second mounting structures 250 on different hanging surface plates 200; this application does not limit this.

[0050] In some embodiments, such as Figure 1 and Figure 4 As shown, the rack 100 includes a cabinet 120 and a mounting part 110. The mounting part 110 is connected to the cabinet 120. The cabinet 120 is equipped with a power supply component 300, which is used to supply power to the meter holder 210.

[0051] The cabinet 120 serves as the basic support structure for the entire device, and can be implemented using a combination of a metal frame and a protective shell to form an enclosed space for accommodating the power supply system. It is detachably connected to the mounting plate 200 via the mounting section 110. When replacing the mounting plate 200 with one of different interface specifications, the power supply component 300 continuously outputs an adaptive voltage to the detection probes of the meter holder 210 through a pre-installed universal power interface inside the cabinet 120. This design eliminates the need for separate power supply equipment for different specifications of the mounting plates 200; power transmission can be completed simply through a standardized power interface. This achieves compatibility for the detection functions of multiple types of meters while eliminating the space occupation and cost associated with redundant power supply equipment.

[0052] Mounting section 110 refers to the functional structure in the frame 100 used to support the mounting surface panel 200. Mounting section 110 and cabinet 120 can adopt an integrated frame structure. Mounting section 110 protrudes from the top of cabinet 120. By designing the height of cabinet 120, the mounting section 110 is positioned directly in the operator's field of vision, thereby reducing unnecessary bending movements during the replacement of mounting surface panel 200 and the calibration of the meter under test 500.

[0053] Furthermore, such as Figure 1 and Figure 4 As shown, the top of the cabinet 120 can be divided into a front half and a rear half. The mounting part 110 is located in the rear half, and the front half of the top surface of the cabinet 120 can form an operating platform 121. The front side of the mounting part 110 is used to mount the hanging surface plate 200. The hanging surface plate 200 needs to be equipped with a meter mounting bracket 210 to hang the corresponding meter under test 500. The center of the mounting, hanging surface plate 200 and the meter under test 500 can be brought close to the middle area of ​​the cabinet 120, thereby maintaining the stability of the entire meter calibration device when calibrating the meter and reducing the risk of tipping over.

[0054] In some embodiments, such as Figure 1 , Figure 2 and Figure 5 As shown, a mounting surface 111 is formed on one side of the mounting part 110. The mounting part 110 includes a support step 112 that protrudes from the mounting surface 111. The support step 112 is located at the bottom of the mounting surface 111. When the hanging surface plate 200 is installed, if the hanging surface plate 200 is not fixed to the frame 100, the operator can support the hanging surface plate 200 on the support step 112. The support step 112 can limit the downward displacement of the hanging surface plate 200 under the action of gravity. By applying a force, the hanging surface plate 200 is pressed against the mounting surface 111, that is, the hanging surface plate 200 is attached to the mounting surface 111, which restricts the displacement of the hanging surface plate 200 in the front and back directions, thereby reducing the installation difficulty for the operator and reducing the risk of the hanging surface plate 200 falling.

[0055] Based on the above embodiments, the mounting surface 111 is inclined in a first direction along the vertically upward direction, which is opposite to the protruding direction of the supporting step 112. With the side of the mounting plate 200 that holds the meter 500 under test as the front and the side of the mounting plate 200 facing the inside of the frame 100 as the rear, the mounting surface 111 is inclined rearward in the upward direction. Specifically, this can be achieved by forming an angle of 10-15 degrees between the mounting surface 111 and the vertical direction. This allows operators to observe and adjust the meter's position while standing naturally, without needing to bend over or use a support. Simultaneously, the protruding direction of the supporting step 112 is opposite to the inclination direction of the mounting surface 111, ensuring that when the mounting plate 200 supports the supporting step 112, the torque generated by its weight component along the inclination direction is offset by the reverse supporting force of the supporting step 112, preventing the mounting plate 200 from slipping or becoming structurally unstable due to the inclination angle.

[0056] Specifically, such as Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, a limiting groove 113 is provided on one side of the frame 100, and the hanging surface plate 200 is disposed in the limiting groove 113. The side wall opposite to the opening of the limiting groove 113 forms a mounting surface 111, and the side wall at the bottom of the limiting groove 113 forms a supporting step 112. The limiting groove 113 refers to the groove structure on the front side of the frame 100. The side wall of the groove forms a spatial constraint on the hanging surface plate 200, and at least a part of the structure of the hanging surface plate 200 is recessed into the limiting groove 113, which can enhance the integrity of the entire meter calibration device and improve its aesthetics.

[0057] In a preferred embodiment, the thickness of the plate body 230 of the hanging surface plate 200 is less than the depth of the limiting groove 113, so that the plate body 230 of the hanging surface plate 200 can be completely submerged in the limiting groove 113. Of course, in other embodiments, the plate body 230 of the hanging surface plate 200 may also be flush with the front side of the frame 100 or partially protrude from the front side of the frame 100, and this application does not limit this.

[0058] Furthermore, such as Figure 1 , Figure 4 , Figure 5 and Figure 7 As shown, the hanging surface panel 200 is connected to the mounting part 110 by fasteners, with the ends of the fasteners located on the side of the hanging surface panel 200 facing away from the mounting part 110. That is, the hanging surface panel 200 is fixed to the mounting part 110 from the front, thus enabling installation and replacement operations. In this case, the first mounting structure 150 can be a first mounting hole provided on the mounting part 110, which is a threaded hole; the second mounting structure 250 can be a second mounting hole provided on the hanging surface panel 200; the fastener can be a screw, which passes through the second mounting hole and is threadedly connected to the first mounting hole, thereby fixing the hanging surface panel 200 to the mounting part 110.

[0059] like Figure 1 , Figure 4 , Figure 5 and Figure 7 As shown, the frame 100 has an operation port 130 on the side opposite to the mounting plate 200. The meter calibration device also includes a sealing plate 400, which is detachably connected to the frame 100 to close the operation port 130. The operation port 130 refers to the opening structure located on the back of the frame 100, which can be implemented using a rectangular or circular through hole. The edges of the operation port 130 are reinforced by bending. The operation port 130 provides a maintenance passage, allowing personnel to access internal components without disassembling the entire machine. The sealing plate 400 is an independent component covering the operation port 130, which can be fixed with screws or a snap-fit ​​connection structure. The material can be metal plate or engineering plastic. A sealing strip can be installed between the sealing plate 400 and the edge of the operation port 130. The sealing plate 400 achieves the closure and opening of the opening in a detachable manner, ensuring both daily protection and meeting maintenance needs.

[0060] The operating port 130 can be configured as multiple independent small-sized openings, each corresponding to a specific maintenance area; the sealing plate 400 can adopt a split structure, with each sub-sealing plate 400 independently covering one operating port 130. The sealing strip can be made of silicone and is fixed to the edge of the sealing plate 400 by means of a groove.

[0061] Understandably, when replacing the mounting plate 200, it is necessary to first disconnect the electrical connection between the internal power supply component 300 and the meter holder 210 on the mounting plate 200, and then remove the old meter surface to completely separate it from the mounting part 110. After installing the new mounting plate 200 on the mounting part 110, it is necessary to reconnect the new mounting plate 200 to the internal power supply component 300. The mounting plate 200 and the internal power supply component 300 can be connected and disconnected via quick-connect terminals.

[0062] Specifically, the mounting section 110 has a wiring space inside. A conductive terminal 220, electrically connected to the mounting surface plate 200, is located on the side of the mounting surface plate 200 opposite to the meter under test 500. When the mounting surface plate 200 is connected to the mounting section 110, the conductive terminal 220 extends into the wiring space. The operation port 130 located in the mounting section 110 communicates with the wiring space, and the conductive terminal 220 is electrically connected to the power supply component 300 located inside the frame 100 via a wire. That is, the operation port 130 can also serve as a wiring window, fully exposing the conductive terminal 220 for convenient wiring operations.

[0063] The mounting part 110 can adopt a frame structure surrounded by crossbeams and longitudinal beams. The solid part of the frame structure is used to set the first mounting structure to fix the mounting part 110 to the hanging surface plate 200. The hollow area of ​​the frame structure can expose the wire terminals or other components of the hanging surface plate 200.

[0064] In some embodiments, such as Figure 1 and Figure 5 As shown, the rack 100 includes at least two sub-racks 100a, which are arranged sequentially in a horizontal direction, and any two adjacent sub-racks 100a can be detachably connected.

[0065] In the first example of the above embodiments, the rack 100 adopts a split design, so that the two sub-racks 100a can be separated during transportation, reducing the volume of a single transportation.

[0066] For example, the rack 100 may include two sub-racks 100a: a left rack 100 and a right rack 100. During transport, the left rack 100 and right rack 100 can be separated and transported separately, thus improving transport convenience. The left rack 100 and right rack 100 can be fixed together using bolts or other fasteners. Each of the left rack 100 and right rack 100 has a semi-groove, meaning that the left rack 100 and right rack 100 can be joined together to form a complete mounting groove.

[0067] When the number of sub-racks 100a exceeds a certain number, the power supply component 300 is set at the left and right ends of the sub-racks 100a, so that the required number of sub-racks 100a can be expanded in the middle of the left and right ends of the sub-racks 100a. In this example, the expanded sub-racks 100a only need to reserve wiring ports and be powered by the power supply component 300 at the left and right ends, without the need to set up independent power supply components 300.

[0068] In the second example of the above embodiments, sub-rack 100a refers to a structural unit that independently supports the hanging surface plate 200. Each sub-rack 100a has an independent mounting slot; that is, each sub-rack 100a has a complete mounting interface and connection structure, and can independently complete the meter testing function. Specifically, the sub-rack 100a forms an independent unit through modular design. When testing demand increases, the operator can horizontally connect and fix the new sub-rack 100a to the existing sub-rack 100a to expand the overall testing capacity; when testing demand decreases, redundant sub-rack 100a can be removed by reverse operation. The connection structure between adjacent sub-racks 100a forms a rigid support in the combined state, preventing displacement or deformation due to external forces. This detachable assembly method allows the testing device to dynamically adjust its physical space occupation according to the actual task scale, eliminating the need to purchase multiple fixed-size devices.

[0069] In the second example, the physical structure of the meter testing device is dynamically expandable through sub-rack 100a. Operators can flexibly adjust the combination size of sub-rack 100a according to the number of meters to be tested, avoiding redundant purchases or idle waste due to fixed equipment functions. Simultaneously, the modular structure simplifies equipment maintenance; a failure of a single sub-rack 100a will not affect overall operation, and the testing function can be restored simply by replacing the faulty unit.

[0070] Furthermore, such as Figure 1 , Figure 2 and Figure 5As shown, the rack 100 also includes a decorative element 140, which covers the side of the hanging surface panel 200 at the connection between two adjacent sub-racks 100a. Specifically, the decorative element 140 is installed on the top of the two adjacent sub-racks 100a and, through a bent structure, conceals the front joint of the two sub-racks 100a, reducing the jaggedness of the joint. The bent structure on the front of the decorative element 140 can be screen-printed with a company logo, enhancing the aesthetics and recognizability of the rack.

[0071] The decorative component 140 can be made of injection-molded plastic cover or metal stamping. The decorative component 140 is fixed to the sub-frame 100a by snap-fit ​​or screws. The decorative component 140 can be provided in both the first example and the second example described above.

[0072] When the limiting groove 113 is used to pre-position the hanging surface plate 200, the lower edge of the decorative part 140 and the upper edge of the limiting groove 113 can be designed to be parallel, or a certain gap can be maintained between the lower edge of the decorative part 140 and the upper edge of the hanging surface plate 200 when it is installed on the frame 100, to avoid interference and ensure that the decorative part 140 does not hinder the disassembly or adjustment of the hanging surface plate 200. The gap between the lower edge of the decorative part 140 and the upper edge of the hanging surface plate 200 can be controlled within mm to mm.

[0073] In some embodiments, such as Figure 1 , Figure 2 and Figure 8 As shown, the mounting surface panel 200 can include multiple sub-mounting surface panels. Correspondingly, the front side of the mounting part 110 can be divided into independent mounting areas, each with a sub-mounting surface panel. The mounting part 110 is divided into multiple independent mounting areas, each with a sub-mounting surface panel of a corresponding interface specification. The sub-mounting surface panels are fixed in the mounting area by a detachable connection, forming a modular detection unit. When the mounting surface panel 200 needs to detect too many meters 500 simultaneously, the mounting surface panel 200 can be designed as a split structure, thereby maintaining multiple detection positions on each sub-mounting surface panel, avoiding excessive area and weight of the mounting surface panel 200, and reducing the difficulty of installation and replacement of the mounting surface panel 200.

[0074] In some embodiments, such as Figure 1 , Figure 8 and Figure 9As shown, the mounting plate 200 includes a plate body 230, a pressure gauge handle 240, and a mounting base 210. The plate body 230 is a planar structure that supports the testing components, and can be made of metal or engineering plastic. The plate body 230 is used for detachable connection with the frame 100. The plate body 230 has multiple testing positions, which are independent testing areas divided on the plate body 230. Each testing position is equipped with a pressure gauge handle 240 and a mounting base 210. The pressure gauge handle 240 and the mounting base 210 corresponding to the same testing position are arranged opposite each other in the vertical direction. The pressure gauge handle 240 is a mechanical component that clamps the meter 500 under test, and can be implemented using a spring-loaded lever structure. The meter is pressed onto the mounting base 210 by a downward action. The mounting base 210 is a base for installing the testing probes, and can be implemented using replaceable interface modules. The probe arrangement of different mounting bases 210 matches different meter interfaces.

[0075] Specifically, the plate 230 is connected to the frame 100 via bolts or clips, enabling quick assembly and disassembly. When testing meters with different interface types, only the plate 230 with the corresponding meter mount 210 needs to be replaced. The pressure handle 240 of each testing position is vertically aligned with the meter mount 210, clamping the meter between them, with the testing probe making vertical contact with the meter interface. Multiple testing positions can simultaneously house multiple meters, and the testing signals are transmitted to the control unit within the frame 100 via independent lines. The vertical clamping method prevents horizontal displacement of the meter due to gravity, ensuring probe contact stability.

[0076] In some embodiments, such as Figure 1 , Figure 8 and Figure 9 As shown, the pressure gauge handle 240 includes a mounting base 241, a pressing handle 242, a transmission connecting rod 243, a sliding connecting rod 244, and a pressure block 245. The mounting base 241 can be fixed to the plate 230 by fasteners such as bolts. One end of the pressing handle 242 is rotatably connected to the mounting base 241, and the other end of the pressing handle 242 forms a gripping structure. One end of the transmission connecting rod 243 is rotatably connected to the pressing handle 242, and the other end is rotatably connected to the sliding connecting rod 244. The movable connecting rod is slidably connected to the mounting base 241 along a first direction, which is parallel to the plane of the plate 230. The other end of the sliding connecting rod 244 is fixed with a pressure block 245. The part of the pressure block 245 that contacts the meter under test 500 can be designed as a flexible structure, such as being made of flexible materials like rubber or silicone.

[0077] When it is necessary to press the meter under test 500, operate the grip structure to rotate the pressing handle 242 downward, the transmission link 243 pushes the sliding link 244 to move in the direction close to the meter under test 500 until the pressing block 245 is pressed against the meter under test 500, and the pressing handle 242 reaches the self-locking position, thereby maintaining the pressing state of the meter under test 500.

[0078] The mounting base 241 may include two support plates 2411, which are spaced apart along a first direction. Each support plate 2411 has a guide hole, through which the sliding link 244 passes sequentially, thereby guiding the sliding link 244 and improving the stability of its movement path. Alternatively, a support block with a certain thickness along the first direction may be provided, with guide holes formed on the support block to guide the sliding link 244; this application does not limit this approach.

[0079] An adjustment groove can be designed on the plate 230. After determining the installation position of the mounting base 241, bolts can be passed through the mounting base 241 and the adjustment groove, and then the mounting base 241 and the plate 230 can be locked from the back using a nut and bolt. Thus, when developing a new hanging surface plate 200, the position of the pressure gauge handle 240 can be adjusted according to the specifications obtained from the hanging surface plate 200.

[0080] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A meter calibration device, characterized in that, include: A frame having a mounting section and a first mounting structure, wherein the first mounting structure is disposed in the mounting section; Multiple types of mounting plates are available, each of which has a mounting base and a second mounting structure. The detection probes of the mounting bases of different types of mounting plates are matched with the interfaces of different meters under test. The first mounting structure is used to cooperate with any of the second mounting structures of the mounting surface plate and fix the mounting surface plate and the mounting part to detect the corresponding meter under test.

2. The meter calibration device according to claim 1, characterized in that, One side of the mounting part forms a mounting surface, and the mounting part includes a support step protruding from the mounting surface. The hanging surface plate is supported by the support step and fits against the mounting surface.

3. The meter calibration device according to claim 2, characterized in that, The mounting surface is inclined in a first direction along the vertical upward direction, and the first direction is opposite to the protruding direction of the supporting step.

4. The meter calibration device according to claim 2, characterized in that, A limiting groove is provided on one side of the mounting part, and the hanging surface plate is disposed in the limiting groove; The sidewall opposite to the opening of the limiting groove forms the mounting surface, and the sidewall at the bottom of the limiting groove forms the supporting step.

5. The meter calibration device according to claim 1, characterized in that, The first mounting structure includes a first mounting hole formed in the mounting portion, and the second mounting structure includes a second mounting hole formed in the hanging surface plate; The meter calibration device also includes a fastener, which passes through the second mounting hole and is threadedly connected to the first mounting hole.

6. The meter calibration device according to claim 1, characterized in that, The frame has an operating port on the side opposite to the hanging surface plate. The meter calibration device also includes a sealing plate, which is detachably connected to the frame to close the operating port.

7. The meter calibration device according to claim 6, characterized in that, The second mounting structure is connected to the first mounting structure by fasteners, the ends of which are located on the side of the hanging surface plate opposite to the mounting portion; and / or, The mounting section has a wiring space inside. The side of the mounting plate opposite to the meter under test is provided with a conductive terminal that is electrically connected to the mounting plate. When the mounting plate is connected to the mounting section, the conductive terminal extends into the wiring space. At least part of the operating port is connected to the wiring space. The conductive terminal is electrically connected to the power supply component located inside the frame through a wire.

8. The meter calibration device according to claim 1, characterized in that, The rack includes a cabinet, the mounting part is connected to the cabinet, and a power supply component is provided inside the cabinet for supplying power to the meter holder.

9. The meter calibration device according to claim 1, characterized in that, The mounting section has multiple mounting areas, and the hanging surface plate includes multiple sub-hanging surface plates, with each mounting area having one sub-hanging surface plate; and / or The rack includes at least two sub-racks, which are arranged sequentially in a horizontal direction, and any two adjacent sub-racks can be detachably connected.

10. The meter calibration device according to claim 1, characterized in that, The mounting plate includes a plate body, a pressure gauge handle, and a pressure gauge holder; the plate body is detachably connected to the frame, and the plate body has multiple inspection positions, each inspection position corresponding to the pressure gauge handle and the pressure gauge holder, and the pressure gauge handle and the pressure gauge holder corresponding to the same inspection position are arranged opposite each other in the vertical direction.

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