A three-phase electric energy meter calibration device

Abstract

The present invention provides a three-phase electric energy meter calibration device, including several calibration positions, each of which includes a pressure plate, a push assembly, a meter holder, a push plate, two connecting shafts, two support plates, two pressing assemblies and four adjustment assemblies; when the three-phase electric energy meter to be tested is calibrated, the electric hydraulic rod is extended to move the pressure plate downward until the pressure plate contacts the top of the three-phase electric energy meter to be tested, fix the electric energy meter and perform a primary limit; the connecting shaft drives the two support plates to approach each other, so that the push plate contacts the side of the electric energy meter, and the two push plates perform a secondary limit on the three-phase electric energy meter to be tested. Compared with the prior art, the multi-level positioning solves the technical problem that the prior art needs to match a variety of calibration positions of different specifications to clamp and calibrate the three-phase electric energy meter, thereby improving the stability of the test results; and the clamping work of three-phase electric energy meters of different types and specifications can be completed, thereby improving the efficiency of the calibration work.

Description

Technical Field

[0001] The invention relates to the field of three-phase electric energy meters, and in particular to a three-phase electric energy meter calibration device. Background Art

[0002] The three-phase energy meter is used to measure the energy output (or load loss) of the power supply in the three-phase AC circuit. Its working principle is roughly the same as that of the single-phase energy meter. The three-phase energy meter inspection device adopts the internationally advanced new generation digital power source, which is based on the MCU single chip and adopts digital synthesis, digital frequency modulation, digital amplitude modulation, digital phase shift, pulse width modulation and other technologies.

[0003] At present, in the field of three-phase energy meter calibration based on dynamic performance monitoring, the three-phase energy meter needs to be wired for monitoring after assembly to test whether the energy meter is qualified. In order to simplify the wiring, the prior art uses different test devices for calibration of direct-plug three-phase energy meters. Among them, in order to ensure the stability and accuracy of the test results of the direct-plug three-phase energy meter, the calibration requires a fixture to limit the three-phase energy meter, and it is necessary to match and replace a variety of calibration table positions of different specifications to clamp and calibrate the three-phase energy meter. Therefore, there is an urgent need for a three-phase energy meter calibration device that does not require frequent replacement of calibration table positions. Summary of the invention

[0004] The present invention provides a three-phase electric energy meter calibration device, which solves the technical problem of the prior art that a plurality of calibration tables of different specifications are required to perform clamping and calibration on the three-phase electric energy meter through secondary limiting, thereby improving the stability of the detection result.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a three-phase electric energy meter calibration device, including a plurality of calibration positions, each of which includes a pressing plate, a pushing assembly, a meter holder, a plug-in assembly, two pushing plates, two connecting shafts, two supporting plates, two pressing assemblies and four adjusting assemblies; wherein:

[0006] The pushing assembly includes an electric hydraulic rod, the bottom of the pushing assembly is connected to the upper surface of the pressing plate, the left and right ends of the lower surface of the pressing plate are respectively connected to two of the adjusting assemblies, and a hanging meter seat is provided directly below the pressing plate; the pressing assembly includes a pin and a pushing plate; the adjusting assembly includes teeth;

[0007] The upper surface of the meter holder is provided with a table, and the upper surface of the table is provided with the plug-in assembly, the two connecting shafts are respectively provided on the left and right sides of the table, and the head and tail directions of the two connecting shafts are parallel to the left and right edges of the table; the plug-in assembly includes a limit frame and a connection port; the middle part of the connecting shaft is clamped with the support plate, and the outer walls of both ends of the connecting shaft are provided with gear rings, and the gear rings are on the same vertical line and correspond to the adjustment assembly, the top of the support plate is hinged to one end of the push plate through the pin shaft, and the plug-in assembly is located between the two support plates;

[0008] When the three-phase electric energy meter to be inspected is being calibrated, the three-phase electric energy meter to be inspected is placed in the limit frame, the connection port is inserted into the limit frame, and the electric hydraulic rod is extended to move the pressure plate downward until the pressure plate contacts the top of the three-phase electric energy meter to be inspected, thereby fixing the three-phase electric energy meter to be inspected in the limit frame; the four adjustment components are driven downward by the pressure plate to make the gear ring mesh with the teeth, thereby limiting the three-phase electric energy meter to be inspected once; and the connecting shaft drives the two support plates to approach each other, so that the support plate drives the push plate to contact the side of the three-phase electric energy meter to be inspected, and the two push plates limit the three-phase electric energy meter to be inspected twice.

[0009] As a preferred solution, both ends of the connecting shaft are provided with coil springs, and the coil springs are sleeved on the outer walls of both sides of the connecting shaft; after the three-phase electric energy meter to be inspected is calibrated, the electric hydraulic rod contracts to move the pressure plate upward, driving the adjustment assembly to move upward, and the connecting shaft drives the support plate and the push plate away from the three-phase electric energy meter to be inspected, and the support plate is tilted by the coil spring.

[0010] As a preferred solution, grooves are provided on the left and right sides of the table top, and the connecting shaft is arranged in the grooves; bearings are provided at both ends of the connecting shaft, and the two sides of the inner wall of the groove are connected through the bearings; retaining rings are provided on the front and back sides of the support plate, and the retaining rings are clamped on the outer walls of both sides of the connecting shaft; the coil spring is located on the outside of the retaining ring, and the front side of the retaining ring is connected to the back side of the bearing through the coil spring.

[0011] As a preferred solution, the three-phase electric energy meter calibration table further includes a workbench, a calibration bracket, a crossbeam and a plurality of vertical poles; wherein the vertical poles correspond to the calibration table one by one;

[0012] The calibration bracket is provided behind the upper surface of the workbench, the lower surface of the calibration bracket is connected to the workbench, a crossbeam is provided on the inner upper edge of the calibration bracket, the lower surface of the crossbeam is connected to the top ends of the plurality of vertical poles, the bottom ends of the plurality of vertical poles are connected to the lower surface of the front inner wall of the calibration bracket, and the upper surface of the crossbeam is connected to all pushing components.

[0013] As a preferred solution, the three-phase electric energy meter calibration device further comprises a plurality of sliders and corresponding slide slots, wherein the sliders correspond one to one with the calibration meter positions;

[0014] The pushing assembly also includes a support plate, the outer wall of the electric hydraulic rod is connected to the upper surface of the beam through the support plate, the back of the pressure plate is connected to the front of the slider, the slider is slidably connected in the slide groove, and the slide groove is arranged on the front of the vertical rod.

[0015] As a preferred solution, the three-phase electric energy meter verification device further includes an identification component, a control box, an alarm and a display panel; wherein:

[0016] The alarm and the display panel are respectively arranged above and below the front of the meter holder; the identification component includes an image sensor and a connecting rod, the front of the image sensor is connected to one end of the connecting rod, and the other end of the connecting rod is connected to the bottom of the electric hydraulic rod;

[0017] The control box is arranged on the upper surface of the workbench, and includes a data acquisition module, a comparison and analysis module, and an identity authentication module; the data acquisition module is used to collect data of the standard electric energy meter and data of the electric energy meter to be inspected;

[0018] The data acquisition module includes an image recognition unit; the image recognition unit is used to receive the image acquired by the image sensor to perform image and text recognition;

[0019] The identity verification module is used to identify the user; wherein the identity verification includes key input verification, face verification and fingerprint verification;

[0020] The comparative analysis module includes an identification and statistics unit and a visualization export unit;

[0021] The identification statistics unit is configured to:

[0022] Acquiring the standard electric energy meter data and the electric energy meter data to be inspected;

[0023] Calculating a differentiation threshold value according to the standard electric energy meter data and the electric energy meter data to be tested;

[0024] If the differentiation threshold is within the preset threshold range, it is confirmed that the electric energy meter to be inspected is a qualified electric energy meter;

[0025] If the differentiation threshold is not within the preset threshold range, the electric energy meter to be inspected is confirmed to be an unqualified electric energy meter, and the alarm is controlled to send an alarm message;

[0026] The visualization export unit is used to export the recognition statistics result from the recognition statistics unit and send it to the display panel, so that the display panel displays the verification result.

[0027] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0028] The embodiment of the present invention provides a three-phase electric energy meter calibration device, including several calibration tables, each of which includes a pressure plate, a pushing assembly, a meter holder, two push plates, a plug-in assembly, two connecting shafts, two support plates, two pressing assemblies and four adjusting assemblies; wherein the pushing assembly includes an electric hydraulic rod, the bottom of the pushing assembly is connected to the upper surface of the pressure plate, the left and right ends of the lower surface of the pressure plate are respectively connected to two adjusting assemblies, and the meter holder is provided directly below the pressure plate; the pressing assembly includes a pin and a push plate; the adjusting assembly includes teeth; the upper surface of the meter holder is provided with a table, the upper surface of the table is provided with the plug-in assembly, the two connecting shafts are respectively provided on the left and right sides of the table, and the head and tail directions of the two connecting shafts are parallel to the left and right edges of the table; the plug-in assemblies each include a limit frame and a connection port; the middle part of the connecting shaft is clamped with the support plate , the outer walls of both ends of the connecting shaft are provided with gear rings, and the gear rings and the adjusting components are on the same vertical line and correspond to each other, the top of the support plate is hinged to one end of the push plate through the pin shaft, and the plug-in component is located between the two support plates; when the three-phase electric energy meter to be inspected is calibrated, the three-phase electric energy meter to be inspected is placed in the limit frame, the connection port is inserted into the limit frame, and the electric hydraulic rod is extended to move the pressing plate downward until the pressing plate contacts the top of the three-phase electric energy meter to be inspected, and the three-phase electric energy meter to be inspected is fixed in the limit frame; the four adjusting components are driven downward by the pressing plate to make the gear ring mesh with the teeth to limit the three-phase electric energy meter to be inspected once; and the connecting shaft drives the two support plates to approach each other, so that the support plate drives the push plate to contact the side of the three-phase electric energy meter to be inspected, and the two push plates limit the three-phase electric energy meter to be inspected twice. Compared with the existing technology, the three-phase electric energy meter to be inspected is fixed in the limit frame by a pressure plate to achieve primary limit, and the push plate is further contacted with the side of the three-phase electric energy meter to achieve secondary limit. The multi-level positioning solves the technical problem of the existing technology that a variety of calibration tables of different specifications are required to clamp and calibrate the three-phase electric energy meter, thereby improving the stability of the test results; and the clamping work of three-phase electric energy meters of different types and specifications can be completed, thereby improving the efficiency of the calibration work.

[0029] Furthermore, by comparing the differentiated threshold with the preset threshold range and visually displaying it through a display panel after export, the convenience of the verification work is improved and the degree of manual intervention in the verification process is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 : A three-dimensional structural schematic diagram of an embodiment of the three-phase electric energy meter calibration device provided by the present invention.

[0031] Figure 2 : A schematic diagram of the three-dimensional structure of an embodiment of a workbench provided by the present invention.

[0032] Figure 3 : A three-dimensional structural schematic diagram of an embodiment of the pushing assembly provided by the present invention.

[0033] Figure 4 : A three-dimensional structure diagram of an embodiment of the push assembly provided by the present invention Figure 2 .

[0034] Figure 5 : A schematic diagram of the three-dimensional structure of an embodiment of the table provided by the present invention.

[0035] Figure 6 : A schematic diagram of the three-dimensional structure of an embodiment of a connecting axis of the table provided by the present invention.

[0036] Figure 7 : A schematic structural diagram of an embodiment of the verification system provided by the present invention.

[0037] Figure 8 : A schematic diagram of module connections of an embodiment of the data acquisition module provided by the present invention.

[0038] In the figure: 1-workbench; 2-calibration bracket; 3-crossbeam; 4-vertical pole; 5-push assembly; 51-electric hydraulic rod; 52-support plate; 6-pressure plate; 7-identification assembly; 71-connecting rod; 72-image sensor; 8-adjustment assembly; 81-connecting plate; 82-teeth; 9-slider; 10-slide; 11-hook stand; 12-alarm; 13-display panel; 14-table; 15-plug assembly; 151-limit frame; 152-connection port; 16-groove; 17-connecting shaft; 18-gear ring; 19-retaining ring; 20-coil spring; 21-bearing; 22-support plate; 23-pressing assembly; 231-pin shaft; 232-push plate; 24-control box. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Embodiment one:

[0041] Please refer to Figure 1 , Figure 3 and Figure 5 The embodiment of the present invention provides a three-phase electric energy meter calibration device, comprising a plurality of calibration meter positions (preferably 3), a workbench 1, a calibration bracket 2, a beam 3 and a plurality of upright poles 4; wherein:

[0042] The vertical poles 4 correspond one to one with the calibration positions; each of the calibration positions includes a pressure plate 6, a pushing assembly 5, a meter holder 11, a plug-in assembly 15, two push plates 232, two connecting shafts 17, two support plates 22, two pressing assemblies 23 and four adjustment assemblies 8.

[0043] Reference Figure 2 The calibration bracket 2 is provided at the rear of the upper surface of the workbench 1, and the lower surface of the calibration bracket 2 is fixedly connected to the workbench 1. A crossbeam 3 is provided on the inner upper edge of the calibration bracket 2, and the lower surface of the crossbeam 3 is fixedly connected to the top ends of the plurality of vertical poles 4. The bottom ends of the plurality of vertical poles 4 are all fixedly connected to the lower surface of the front inner wall of the calibration bracket 2, and the upper surface of the crossbeam 3 is fixedly connected to all the pushing components 5.

[0044] Reference Figure 3 , Figure 4 and Figure 5 The pushing assembly 5 includes an electric hydraulic rod 51, the bottom of the pushing assembly 5 is fixedly connected to the upper surface of the pressing plate 6, the left and right ends of the lower surface of the pressing plate 6 are respectively fixedly connected to two of the adjusting assemblies 8, and a meter holder 11 is provided directly below the pressing plate 6, and an alarm 12 and a display panel 13 are respectively provided above and below the front of the meter holder 11; the pressing assembly 23 includes a pin 231 and a pushing plate 232; the adjusting assembly 8 includes a connecting plate 81 and teeth 82, and the bottom of the connecting plate 81 adopts an inclined design.

[0045] Reference Figure 5A table 14 is provided on the upper surface of the meter holder 11, and the plug-in assembly 15 is provided on the upper surface of the table 14. The two connecting shafts 17 are respectively provided on the left and right sides of the table 14, and the head and tail directions of the two connecting shafts 17 are parallel to the left and right edges of the table 14; the plug-in assembly 15 includes a limit frame 151 and a connection port 152; the middle part of the connecting shaft 17 is clamped with the support plate 22, and the outer walls of both ends of the connecting shaft 17 are provided with gear rings 18, and the gear rings 18 and the adjustment assembly 8 are on the same vertical line and correspond to each other, the top of the support plate 22 is hinged to one end of the push plate 232 through the pin shaft 231, and the other end of the push plate 232 is also provided with an anti-slip pad (not shown in the figure), and the plug-in assembly 15 is located between the two support plates 22.

[0046] In this embodiment, refer to Figure 5 and Figure 6 , both ends of the connecting shaft 17 are provided with coil springs 20, and the coil springs 20 are sleeved on the outer walls of both sides of the connecting shaft 17; the left and right sides of the table 14 are provided with grooves 16, and the connecting shaft 17 is arranged in the grooves 16; both ends of the connecting shaft 17 are provided with bearings 21, and the two sides of the inner wall of the groove 16 are connected through the bearings 21; the front and rear sides of the support plate 22 are provided with snap rings 19, and the snap rings 19 are snapped on the outer walls of both sides of the connecting shaft 17; the coil spring 20 is located on the outside of the snap ring 19, and the front side of the snap ring 19 is connected to the back side of the bearing 21 through the coil spring 20.

[0047] Furthermore, in this embodiment, the three-phase electric energy meter calibration device also includes a plurality of sliders 9 and corresponding slide grooves 10, wherein the sliders 9 correspond to the calibration meter positions one by one, and the sliders 9 and slide grooves 10 are both T-shaped.

[0048] The pushing assembly 5 also includes a support plate 52, and the outer wall of the electric hydraulic rod 51 is fixedly connected to the upper surface of the crossbeam 3 through the support plate 52. The back side of the pressure plate 6 is fixedly connected to the front side of the slider 9. The slider 9 is slidably connected in the slide groove 10, and the slide groove 10 is arranged on the front side of the vertical rod 4.

[0049] When the three-phase electric energy meter to be tested is tested, the three-phase electric energy meter to be tested is placed in the limit frame 151, the connection port 152 is inserted into the limit frame 151, the end of the three-phase electric energy meter to be tested is inserted into the connection port 152, and the electric hydraulic rod 51 is extended to move the pressing plate 6 downward until the pressing plate 6 contacts the top of the three-phase electric energy meter to be tested, and the three-phase electric energy meter to be tested is fixed in the limit frame 151 (the lower surface of the pressing plate 6 is also provided with anti-slip grooves); the four adjustment groups Component 8 is driven downward by the pressure plate 6 to make the gear ring 18 mesh with the teeth 82, and the three-phase electric energy meter to be inspected is limited once; and the connecting shaft 17 drives the two support plates 22 to approach each other, so that the support plate 22 drives the push plate 232, and the push plate 232 cooperates with the connecting shaft 17 and contacts the side of the three-phase electric energy meter to be inspected. The two push plates 232 perform a secondary limit on the three-phase electric energy meter to be inspected, and the anti-slip pad is used to prevent the three-phase electric energy meter to be inspected from sliding and shifting during the secondary limit.

[0050] After the three-phase electric energy meter to be inspected is calibrated, the electric hydraulic rod 51 contracts, driving the pressure plate 6 to move upward, and the pressure plate 6 drives the adjustment assembly 8 to move upward, so that the connecting shaft 17 drives the support plate 22 and the push plate 232 away from the three-phase electric energy meter to be inspected, and the support plate 22 is in an inclined state through the pulling force of the coil spring 20, so as to facilitate the clamping and calibration of another three-phase electric energy meter to be inspected next time; the pressure plate 6 and the push plate 232 are both away from the three-phase electric energy meter to be inspected, and the three-phase electric energy meter to be inspected can be pulled out.

[0051] Optionally, the three-phase electric energy meter verification device further includes an identification component 7, a control box 24, an alarm 12 and a display panel 13; wherein,

[0052] The alarm 12 and the display panel 13 are respectively arranged above and below the front of the meter holder 11; the identification component 7 includes an image sensor 72 and a connecting rod 71, the front of the image sensor 72 is connected to one end of the connecting rod 71, and the other end of the connecting rod 71 is connected to the bottom of the electric hydraulic rod 51.

[0053] The control box 24 is arranged on the right side of the upper surface of the workbench 1, and includes a data acquisition module, a comparison and analysis module, a data storage module and an identity authentication module; the data acquisition module is connected to the three-phase standard electric energy meter and the three-phase electric energy meter to be inspected, and is used to collect standard electric energy meter data and electric energy meter data to be inspected.

[0054] The data acquisition module includes an image recognition unit; the image recognition unit is used to receive the image acquired by the image sensor 72 to perform image and text recognition.

[0055] The identity authentication module is used to identify the user; wherein the identity identification includes key input verification, face verification and fingerprint verification.

[0056] The data storage module includes a historical data storage library and a calibration standard database.

[0057] The comparative analysis module includes an identification statistics unit and a visualization export unit.

[0058] The identification statistics unit is configured to:

[0059] The standard electric energy meter data and the electric energy meter data to be inspected (the data is mainly electric energy pulse signals); the standard pulse signal of the standard electric energy meter is compared and calculated with the actual pulse detection signal of the electric energy meter to be inspected, and the differential threshold is calculated; if the differential threshold is within the preset threshold range, the electric energy meter to be inspected is confirmed to be a qualified electric energy meter; if the differential threshold is not within the preset threshold range, the electric energy meter to be inspected is confirmed to be an unqualified electric energy meter, and the alarm 12 is controlled to send an alarm message, and the qualified and unqualified three-phase electric energy meters are statistically divided to obtain the proportion of qualified / unqualified products. Among them, the preset threshold range is also a differentiated standard threshold range, which is stored in the verification standard database.

[0060] The visualization export unit is used to export the recognition statistics result from the recognition statistics unit and send it to the display panel 13, so that the display panel 13 displays the verification result.

[0061] Accordingly, refer to Figure 7 As an example of this embodiment, the embodiment of the present invention also provides a three-phase electric energy meter verification system. Figure 7 The three-phase electric energy meter verification system includes an image sensor 72, a data acquisition module, an identity authentication module, an identity authentication module, a comparison and analysis module, a data storage module, an alarm 12, a display panel 13, a three-phase standard electric energy meter and a plurality of meter holders 11.

[0062] The input end of the data acquisition module is connected to the three-phase standard electric energy meter, the output end of the identity authentication module is connected to the input end of the data acquisition module, the input end of the data acquisition module is connected to the output end of the image sensor 72, the data acquisition module is bidirectionally connected to the data storage module, the data acquisition module is bidirectionally connected to the comparison and analysis module, and the interaction between the data acquisition module and other modules can be referred to Figure 8 .

[0063] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0064] The embodiment of the present invention provides a three-phase electric energy meter calibration device, including several calibration tables, each of which includes a pressure plate, a pushing assembly, a meter holder, a plug-in assembly, two push plates, two connecting shafts, two support plates, two pressing assemblies and four adjusting assemblies; wherein, the pushing assembly includes an electric hydraulic rod, the bottom of the pushing assembly is connected to the upper surface of the pressure plate, the left and right ends of the lower surface of the pressure plate are respectively connected to two adjusting assemblies, and the meter holder is provided directly below the pressure plate; the pressing assembly includes a pin shaft and a pushing plate; the adjusting assembly includes teeth; the upper surface of the meter holder is provided with a table, the upper surface of the table is provided with the plug-in assembly, the two connecting shafts are respectively provided on the left and right sides of the table, and the head and tail directions of the two connecting shafts are parallel to the left and right edges of the table; the plug-in assemblies each include a limit frame and a connection port; the middle part of the connecting shaft is clamped with the support plate , the outer walls of both ends of the connecting shaft are provided with gear rings, and the gear rings and the adjusting components are on the same vertical line and correspond to each other, the top of the support plate is hinged to one end of the push plate through the pin shaft, and the plug-in component is located between the two support plates; when the three-phase electric energy meter to be inspected is calibrated, the three-phase electric energy meter to be inspected is placed in the limit frame, the connection port is inserted into the limit frame, and the electric hydraulic rod is extended to move the pressing plate downward until the pressing plate contacts the top of the three-phase electric energy meter to be inspected, and the three-phase electric energy meter to be inspected is fixed in the limit frame; the four adjusting components are driven downward by the pressing plate to make the gear ring mesh with the teeth to limit the three-phase electric energy meter to be inspected once; and the connecting shaft drives the two support plates to approach each other, so that the support plate drives the push plate to contact the side of the three-phase electric energy meter to be inspected, and the two push plates limit the three-phase electric energy meter to be inspected twice. Compared with the existing technology, the three-phase electric energy meter to be inspected is fixed in the limit frame by a pressure plate to achieve primary limit, and the push plate is further contacted with the side of the three-phase electric energy meter to achieve secondary limit. The multi-level positioning solves the technical problem of the existing technology that a variety of calibration tables of different specifications are required to clamp and calibrate the three-phase electric energy meter, thereby improving the stability of the test results; and the clamping work of three-phase electric energy meters of different types and specifications can be completed, thereby improving the efficiency of the calibration work.

[0065] Furthermore, by comparing the differentiated threshold with the preset threshold range and visually displaying it through a display panel after export, the convenience of the verification work is improved and the degree of manual intervention in the verification process is reduced.

[0066] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0067] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A three-phase electric energy meter calibration device, characterized in that: It includes several test sites, each of which includes a pressing plate, a pushing assembly, a meter holder, a plug-in assembly, two pushing plates, two connecting shafts, two supporting plates, two pressing assemblies and four adjusting assemblies; wherein: The pushing assembly includes an electric hydraulic rod, the bottom of the pushing assembly is connected to the upper surface of the pressing plate, the left and right ends of the lower surface of the pressing plate are respectively connected to two of the adjusting assemblies, and a hanging meter seat is provided directly below the pressing plate; the pressing assembly includes a pin and a pushing plate; the adjusting assembly includes teeth; The upper surface of the meter holder is provided with a table, and the upper surface of the table is provided with the plug-in assembly, the two connecting shafts are respectively provided on the left and right sides of the table, and the head and tail directions of the two connecting shafts are parallel to the left and right edges of the table; the plug-in assembly includes a limit frame and a connection port; the middle part of the connecting shaft is clamped with the support plate, and the outer walls of both ends of the connecting shaft are provided with gear rings, and the gear rings are on the same vertical line and correspond to the adjustment assembly, the top of the support plate is hinged to one end of the push plate through the pin shaft, and the plug-in assembly is located between the two support plates; When the three-phase electric energy meter to be inspected is being calibrated, the three-phase electric energy meter to be inspected is placed in the limit frame, the connection port is inserted into the limit frame, and the electric hydraulic rod is extended to move the pressure plate downward until the pressure plate contacts the top of the three-phase electric energy meter to be inspected, thereby fixing the three-phase electric energy meter to be inspected in the limit frame; the four adjustment components are driven downward by the pressure plate to make the gear ring mesh with the teeth, thereby limiting the three-phase electric energy meter to be inspected once; and the connecting shaft drives the two support plates to approach each other, so that the support plate drives the push plate to contact the side of the three-phase electric energy meter to be inspected, and the two push plates limit the three-phase electric energy meter to be inspected twice.

2. A three-phase electric energy meter calibration device as claimed in claim 1, characterized in that: Both ends of the connecting shaft are provided with coil springs, and the coil springs are sleeved on the outer walls of both sides of the connecting shaft; After the three-phase electric energy meter to be inspected is calibrated, the electric hydraulic rod contracts to move the pressure plate upward, driving the adjustment assembly to move upward, and the connecting shaft drives the support plate and the push plate away from the three-phase electric energy meter to be inspected, and the support plate is tilted by the coil spring.

3. A three-phase electric energy meter calibration device as claimed in claim 2, characterized in that: The left and right sides of the table top are provided with grooves, and the connecting shaft is arranged in the grooves; bearings are provided at both ends of the connecting shaft, and the two sides of the inner wall of the groove are connected through the bearings; the front and rear sides of the support plate are provided with snap rings, and the snap rings are clamped on the outer walls of both sides of the connecting shaft; the coil spring is located outside the snap ring, and the front side of the snap ring is connected to the back side of the bearing through the coil spring.

4. A three-phase electric energy meter calibration device as claimed in claim 1, characterized in that: The three-phase electric energy meter calibration device also includes a workbench, a calibration bracket, a crossbeam and a plurality of vertical poles; wherein the vertical poles correspond to the calibration meter positions one by one; The calibration bracket is provided behind the upper surface of the workbench, the lower surface of the calibration bracket is connected to the workbench, a crossbeam is provided on the inner upper edge of the calibration bracket, the lower surface of the crossbeam is connected to the top ends of the plurality of vertical poles, the bottom ends of the plurality of vertical poles are connected to the lower surface of the front inner wall of the calibration bracket, and the upper surface of the crossbeam is connected to all pushing components.

5. A three-phase electric energy meter calibration device as claimed in claim 4, characterized in that: The three-phase electric energy meter calibration device also includes a plurality of slide blocks and corresponding slide slots, wherein the slide blocks correspond to the calibration meter positions one by one; The pushing assembly also includes a support plate, the outer wall of the electric hydraulic rod is connected to the upper surface of the beam through the support plate, the back of the pressure plate is connected to the front of the slider, the slider is slidably connected in the slide groove, and the slide groove is arranged on the front of the vertical rod.

6. A three-phase electric energy meter calibration device according to any one of claims 1 to 5, characterized in that: The three-phase electric energy meter verification device also includes an identification component, a control box, an alarm and a display panel; wherein: The alarm and the display panel are respectively arranged above and below the front of the meter holder; the identification component includes an image sensor and a connecting rod, the front of the image sensor is connected to one end of the connecting rod, and the other end of the connecting rod is connected to the bottom of the electric hydraulic rod; The control box is arranged on the upper surface of the workbench, and includes a data acquisition module, a comparison and analysis module, and an identity authentication module; the data acquisition module is used to collect data of the standard electric energy meter and data of the electric energy meter to be inspected; The data acquisition module includes an image recognition unit; the image recognition unit is used to receive the image acquired by the image sensor to perform image and text recognition; The identity verification module is used to identify the user; wherein the identity verification includes key input verification, face verification and fingerprint verification; The comparative analysis module includes an identification and statistics unit and a visualization export unit; The identification statistics unit is configured to: Acquiring the standard electric energy meter data and the electric energy meter data to be inspected; Calculating a differentiation threshold value according to the standard electric energy meter data and the electric energy meter data to be tested; If the differentiation threshold is within the preset threshold range, it is confirmed that the electric energy meter to be inspected is a qualified electric energy meter; If the differentiation threshold is not within the preset threshold range, the electric energy meter to be inspected is confirmed to be an unqualified electric energy meter, and the alarm is controlled to send an alarm message; The visualization export unit is used to export the recognition statistics result from the recognition statistics unit and send it to the display panel, so that the display panel displays the verification result.

7. A three-phase electric energy meter calibration device as claimed in claim 6, characterized in that: The number of the detected epitopes is 3.

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