An electric energy meter calibration device for power source testing

Abstract

The present invention provides an electric energy meter calibration device that can be used for power source testing. When the power source to be tested is calibrated, the upper surface of the auxiliary workbench carries the hole of the power source to be tested; the pressure sensor receives pressure data, and the controller starts the fan; at the same time, the positioning plate moves downward to pull the traction cable, and the traction cable pulls the second positioning assembly along the steering wheel, driving the sealing plate to move, and the sealing plate fits with the air holes on the surface of the first conduit; the fan is used to extract the gas in the sealing cover through the first conduit, and to create a negative pressure through the through hole, so that the power source to be tested is fixed, and the detection of the power source to be tested is realized. Compared with the prior art, the fan extracts the gas between the through hole and the power source to be tested, creates a negative pressure state, and adsorbs the power source to be tested to fix it on the auxiliary workbench, which improves the close contact during the measurement process, avoids loosening and dislocation, and thus ensures the stability of the measurement process of the power source to be tested and reduces errors.

Description

Technical Field

[0001] The invention relates to the technical field of electric energy meter calibration, and in particular to an electric energy meter calibration device that can be used for power source testing. Background Art

[0002] The electric energy meter calibration device is a special standard metering equipment, which usually includes a test power supply (power source), a standard electric energy meter, a wiring mechanism, etc. During the electric energy meter calibration, the test power supply is responsible for providing a standard test signal to the electric energy meter to be tested and the standard electric energy meter, so that the two can measure electric energy at the same time, and then compare the electric energy difference between the two and calculate the error of the electric energy meter to be tested. In order to meet the test requirements of the electric energy meter calibration device, the traditional test power source used for three-phase electric energy meter calibration adopts an analog feedback method, that is, analog feedback is performed inside each voltage output circuit and each current output circuit, and each output signal is led to the primary of the power amplifier of the corresponding output circuit through a feedback loop, and feedback access is realized through an adder. However, in actual use, since the performance of the power source needs to be tested regularly, the setting of the auxiliary workbench is particularly important. However, the existing test device simply relies on the friction between the power source and the auxiliary workbench, which often makes it difficult to ensure the stability of the power supply placement, and it is difficult to fix the power source to be tested during detection, causing errors in the test data. Summary of the invention

[0003] The invention provides an electric energy meter calibration device which can be used for power source testing, and solves the technical problem in the prior art that the power source to be tested is difficult to fix.

[0004] In order to solve the above technical problems, an embodiment of the present invention provides an electric energy meter calibration device that can be used for power source testing, including an auxiliary workbench, a traction steel cable, a positioning plate, a pressure sensor, a sealing plate, a first conduit, a steering wheel, a second positioning assembly, a wind power device, a controller, a sealing cover and a plurality of through holes; wherein,

[0005] The sealing plate is adapted to the shape of the inner wall of the first conduit and the shape of the air holes opened on the outer surface; the wind power device includes a fan;

[0006] The upper surface of the auxiliary workbench is provided with the plurality of through holes, the upper surface of the sealing cover is connected to the lower surface of the auxiliary workbench, the auxiliary workbench is connected to the sealing cover through the through holes, and the sealing cover covers all the through holes within a vertical range;

[0007] When the power source to be tested is calibrated, the upper surface of the auxiliary workbench is used to carry the power source to be tested, and the position of the power source to be tested covers no less than one of the through holes;

[0008] The pressure sensor is used to receive pressure data corresponding to the power source to be tested, and send the pressure data to the controller so that the controller starts the fan;

[0009] The pressure sensor is also used to move downward under the pressure of the power source to be measured, so that the positioning plate pulls the traction cable, and the traction cable pulls the second positioning assembly along the steering wheel, driving the sealing plate to move, thereby making the sealing plate fit with the pores on the surface of the first conduit;

[0010] The fan is used to extract the gas in the sealing cover through the first conduit and to create negative pressure through the through hole, so that the power source to be tested is fixed on the auxiliary workbench to achieve the detection of the power source to be tested.

[0011] As a preferred solution, the electric energy meter verification equipment further includes a first positioning component, a pin shaft and a fixing rod;

[0012] The pressure sensor is arranged on the upper surface of the auxiliary workbench, and the pressure sensor is connected to the positioning plate; the front side of the positioning plate is fixedly connected to the back side of the first positioning component, the front side of the first positioning component is connected to one end of the traction steel cable, the other end of the traction steel cable passes through the steering wheel and is connected to the upper surface of the second positioning component, the lower surface of the second positioning component is connected to the upper surface of the sealing plate, and the back side of the sealing plate is hinged to the inner wall of the air hole opened on the outer surface of the first conduit through the pin shaft; wherein, the steering wheel is arranged in the fixing rod, and the top end of the fixing rod is connected to the lower surface of the auxiliary workbench.

[0013] As a preferred solution, the electric energy meter verification equipment further includes an elastic reset rod, a sliding hole and a bottom plate;

[0014] The pressure sensor is connected to the positioning plate, specifically:

[0015] The lower surface of the pressure sensor is connected to the top of the elastic reset rod, the outer surface of the elastic reset rod is connected to the inner wall of the sliding hole, and the bottom of the elastic reset rod is connected to the positioning plate through the bottom plate; wherein the sliding hole is opened on the upper surface of the auxiliary workbench.

[0016] As a preferred solution, the electric energy meter calibration equipment also includes a reinforcement plate, a calibration table, an exhaust hood, an exhaust pipe, a regulating valve, a support frame and a plurality of heat sinks; wherein,

[0017] The upper surface of the auxiliary workbench is connected to the lower surface of the reinforcement plate, and a plurality of calibration positions are arranged on the front of the reinforcement plate, and the calibration positions are used to carry the electric energy meter to be tested;

[0018] The exhaust port on the back of the wind power device is connected to the first end of the exhaust pipe on the front, the second end of the exhaust pipe is connected to the back of the exhaust hood, one end of the support frame is connected to the lower surface of the auxiliary workbench, the other end of the support frame is used to fix the exhaust pipe, the regulating valve is arranged at the bottom end of the exhaust pipe, the front of the exhaust hood is fixedly connected to the back of the reinforcement plate, the back of the reinforcement plate is provided with the plurality of heat sinks, and the positions of the plurality of heat sinks correspond to the positions of the exhaust hood.

[0019] As a preferred solution, the electric energy meter calibration equipment also includes an alarm, a data storage module, a programmable power source, a temperature monitor, an error calculation module, a comparison analysis module and a calibration connection module; wherein,

[0020] The data storage module is used to store pre-compiled verification schemes;

[0021] The controller is also used to read the calibration scheme from the data storage module when calibrating the electric energy meter to be tested, and send a control signal to the program-controlled power source according to the predefined calibration item control source parameters corresponding to the electric energy meter to be tested;

[0022] The program-controlled power source is used to send test electric power to the standard electric energy meter and the verification connection module according to the control signal, and send the test electric power to the electric energy meter to be tested through the verification connection module;

[0023] The verification connection module is used to obtain the test electric power of the programmable power source, send the test electric power to the electric energy meter to be tested, receive the electric energy pulse output by the electric energy meter to be tested according to the test electric power, and send the electric energy pulse output by the test electric power to the error calculation module;

[0024] The error calculation module is used to calculate the error data of the electric energy meter to be tested according to the electric energy pulse output by the standard electric energy meter and the electric energy pulse output by the electric energy meter to be tested, and send the error data to the comparison and analysis module and the data storage module;

[0025] The comparison and analysis module is used to perform a comparison and analysis based on the error data and a preset error limit value, obtain a verification result of the electric energy meter to be tested, and send the verification result to the data storage module; wherein the error limit value is stored in the data storage module;

[0026] The temperature monitor is used to detect the temperature data of the verification epitope. When the temperature data of the verification epitope is abnormal, an alarm is sent to the controller so that the controller alerts the alarm; wherein, the temperature monitor is arranged on the front side of the reinforcement plate, and the controller is arranged on the left side of the auxiliary workbench.

[0027] As a preferred solution, the fan is also used to adjust its own power according to the temperature data and dissipate heat for the detection site.

[0028] As a preferred solution, the electric energy meter verification equipment further includes a tee, a circulation pipe, a control valve, a third conduit and two second conduits;

[0029] The top end of the first conduit is connected to the first end of the tee, the second end and the third end of the tee are respectively connected to the first ends of the two second conduits, and the second ends of the two second conduits are both connected to the first end of the circulation pipe at the front side; wherein the first ends of the two second conduits are opposite surfaces;

[0030] The outer surface of the circulation pipe is connected to the lower surface of the sealing cover, and the upper surface of the circulation pipe is connected to the lower surface of the sealing cover through a joint;

[0031] The bottom end of the first conduit is connected to the upper surface of the control valve, the lower surface of the control valve is connected to the first end of the third conduit at the front, and the second end of the third conduit at the back is connected to the air inlet of the wind power device;

[0032] The wind power device also includes a fixing seat, the upper surface of which is connected to the lower surface of the fan.

[0033] As a preferred solution, the electric energy meter calibration equipment further includes a positioning base plate, a reinforcement plate and four supporting legs; wherein,

[0034] The lower surface of the wind power device is connected to the upper surface of the positioning base plate, and the lower surface of the positioning base plate is connected to the front surface of the reinforcement plate;

[0035] The reinforcing plate is in an I-shape, and the plane of the I-shape is parallel to the ground; the front and back sides of the reinforcing plate are respectively connected to the four supporting legs to fix the relative positions of the four supporting legs;

[0036] The tops of the four supporting legs are connected to the four corners of the lower surface of the auxiliary workbench; wherein the auxiliary workbench is rectangular.

[0037] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0038] The embodiment of the present invention provides an electric energy meter calibration device that can be used for power source testing, comprising an auxiliary workbench, a traction steel cable, a positioning plate, a pressure sensor, a sealing plate, a first conduit, a steering wheel, a second positioning assembly, a wind power device, a controller, a through hole and a sealing cover; wherein the sealing plate is adapted to the shape of the inner wall of the first conduit and the shape of the air holes opened on the outer surface; the wind power device comprises a fan; a plurality of through holes are provided on the upper surface of the auxiliary workbench, the upper surface of the sealing cover is connected to the lower surface of the auxiliary workbench, the auxiliary workbench is connected to the sealing cover through the through holes, and the sealing cover covers all the through holes within a vertical range; when calibrating the power source to be tested, the upper surface of the auxiliary workbench is used to carry the power source to be tested. The power source to be tested is provided with a pressure sensor for receiving pressure data corresponding to the power source to be tested and sending the pressure data to the controller so that the controller starts the fan. The pressure sensor is also used to move downward under the pressure of the power source to be tested so that the positioning plate pulls the traction cable, and the traction cable pulls the second positioning assembly along the steering wheel to drive the sealing plate to move, thereby making the sealing plate fit with the air holes on the surface of the first conduit. The fan is used to extract the gas in the sealing cover through the first conduit and create a negative pressure through the through hole so that the power source to be tested is fixed and the detection of the power source to be tested is realized. Compared with the prior art, the fan extracts the gas between the through hole and the power source to be tested to create a negative pressure state, adsorbs the power source to be tested and fixes it on the auxiliary workbench, improves the close contact between the power source to be tested and the auxiliary workbench during the measurement process, avoids loosening and dislocation, and thus ensures the stability of the measurement process of the power source to be tested and reduces errors.

[0039] Furthermore, a number of through holes are arranged on the surface of the auxiliary workbench, so that the electric energy meter calibration equipment can fix power sources of different specifications and volumes, without the need for staff to manually adjust the wind force and the placement of the power source to be tested, thereby reducing the difficulty of using the electric energy meter calibration equipment.

[0040] Furthermore, the temperature monitor sends an alarm to the controller, so that the controller alerts the alarm, and the fan adjusts its own power according to the temperature data, which greatly avoids the situation where long-term operation or excessive power during the use of the electricity meter calibration equipment causes deviations or temperature fluctuations in the internal power amplifier, reduces the error of the detection data caused by the amplification factor, and ensures the efficient use of the calibration table.

[0041] Furthermore, a working-shaped reinforcement plate is provided between the four supporting legs to fix the relative positions between the four supporting legs, thereby improving the stability and impact resistance of the electric energy meter calibration equipment.

[0042] Furthermore, the electric energy meter calibration equipment also includes an elastic reset rod. After the power source to be tested is tested, the position of the pressure sensor can be restored to facilitate the next test, thereby improving the use efficiency of the electric energy meter calibration equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 : A three-dimensional structural schematic diagram of an embodiment of an electric energy meter calibration device that can be used for power source testing provided by the present invention.

[0044] Figure 2 : A three-dimensional structural schematic diagram of an embodiment of the auxiliary workbench provided by the present invention.

[0045] Figure 3 : A schematic diagram of the three-dimensional structure of an embodiment of the wind power device provided by the present invention.

[0046] Figure 4 : A schematic diagram of the three-dimensional structure of an embodiment of the positioning plate provided by the present invention.

[0047] Figure 5 : A schematic diagram of the three-dimensional structure of an embodiment of the reinforcement plate provided by the present invention.

[0048] Figure 6 : A three-dimensional structural schematic diagram of an embodiment of the connection between the traction steel cable and the second positioning assembly provided by the present invention.

[0049] Figure 7 : A schematic diagram of the principles of an embodiment of the verification system provided by the present invention.

[0050] In the figure: 1- auxiliary workbench; 2- reinforcement plate; 3- calibration table; 4- pressure sensor; 5- sliding hole; 6- elastic reset rod; 7- bottom plate; 8- positioning plate; 9- first positioning assembly; 10- steering wheel; 11- fixing rod; 12- traction steel cable; 13- second positioning assembly; 14- sealing plate; 15- pin shaft; 16- first conduit; 17- tee; 18- second conduit; 19- circulation pipe; 20- sealing cover; 21- through hole; 22- control valve; 23 - third duct; 24 - wind device; 241 - fan; 242 - fixed seat; 25 - positioning base plate; 26 - exhaust pipe; 27 - support frame; 28 - support leg; 29 - reinforcement plate; 30 - temperature monitor; 31 - exhaust hood; 32 - heat sink; 33 - controller; 34 - data storage module; 35 - alarm; 36 - calibration connection module; 37 - comparison and analysis module; 38 - regulating valve; 39 - error calculation module; 40 - programmable power source. DETAILED DESCRIPTION

[0051] 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.

[0052] Embodiment 1:

[0053] Please refer to Figures 1 to 6 , Figure 1 A schematic diagram of the three-dimensional structure of an electric energy meter calibration device that can be used for power source testing provided by an embodiment of the present invention. The electric energy meter calibration device includes an auxiliary workbench 1, a traction cable 12, a positioning plate 8, a pressure sensor 4, a sealing plate 14, a first conduit 16, a steering wheel 10, a second positioning assembly 13, a wind device 24, a controller 33, a plurality of through holes 21, a first positioning assembly 9, a pin 15, a fixing rod 11, an elastic reset rod 6, a sliding hole 5, a bottom plate 7 and a sealing cover 20; wherein,

[0054] Reference Figure 2 , Figure 2 A schematic diagram of the three-dimensional structure of an embodiment of the auxiliary workbench provided by the present invention. The pressure sensor 4 is arranged on the upper surface of the auxiliary workbench 1, and the pressure sensor 4 is connected to the positioning plate 8, specifically: the lower surface of the pressure sensor 4 is fixedly connected to the top of the elastic reset rod 6, the outer surface of the elastic reset rod 6 is fixedly connected to the inner wall of the sliding hole 5, and the bottom of the elastic reset rod 6 is connected to the positioning plate 8 through the bottom plate 7; wherein the sliding hole 5 is opened on the upper surface of the auxiliary workbench 1.

[0055] The bottom of the elastic reset rod 6 is connected to the positioning plate 8 via the bottom plate 7 . Specifically, the bottom end of the elastic reset rod 6 is fixedly connected to the upper surface of the bottom plate 7 , and the lower surface of the bottom plate 7 is fixedly connected to the upper surface of the positioning plate 8 .

[0056] Reference Figure 4 and Figure 6The front of the positioning plate 8 is fixedly connected to the back of the first positioning component 9, the front of the first positioning component 9 is fixedly connected to one end of the traction cable 12, the other end of the traction cable 12 passes through the steering wheel 10 and is fixedly connected to the upper surface of the second positioning component 13, the lower surface of the second positioning component 13 is fixedly connected to the upper surface of the sealing plate 14, and the back of the sealing plate 14 is hinged to the inner wall of the air hole opened on the outer surface of the first conduit 16 through the pin 15; wherein the steering wheel 10 is arranged in the fixing rod 11, and the top end of the fixing rod 11 is fixedly connected to the lower surface of the auxiliary workbench 1. The sealing plate 14 is adapted to the shape of the inner wall of the first conduit 16 and the shape of the air hole opened on the outer surface; refer to Figure 3 The wind power device 24 includes a fan 241 and a fixing seat 242. The upper surface of the fixing seat 242 is fixedly connected to the lower surface of the fan 241.

[0057] The upper surface of the auxiliary workbench 1 is provided with a plurality of through holes 21, the upper surface of the sealing cover 20 is fixedly connected to the lower surface of the auxiliary workbench 1, the auxiliary workbench 1 is connected to the sealing cover 20 through the through holes 21, and the sealing cover 20 covers all the through holes 21 within a vertical range. This embodiment does not further limit the number and size of the through holes 21, and the embodiment of the present application is implemented. Since power sources of different models and specifications have different shapes and volumes, a plurality of through holes 21 are provided on the auxiliary workbench 1, so that the electric energy meter calibration equipment can fix power sources of different specifications and volumes. On the one hand, the close contact between the power source and the auxiliary workbench 1 can be ensured, and on the other hand, there is no need for the staff to manually adjust the wind force and the placement position of the power source to be tested, which reduces the difficulty of using the electric energy meter calibration equipment.

[0058] When calibrating the power source to be tested, the upper surface of the auxiliary workbench 1 is used to carry the power source to be tested, and the position of the power source to be tested covers no less than one of the through holes 21 .

[0059] The pressure sensor 4 is used to receive pressure data corresponding to the power source to be tested, and send the pressure data to the controller 33 so that the controller 33 starts the fan 241 .

[0060] The pressure sensor 4 is also used to move downward under the pressure of the power source to be measured, so that the positioning plate 8 pulls the traction cable 12, and the traction cable 12 pulls the second positioning assembly 13 along the steering wheel 10, driving the sealing plate 14 to move, thereby making the sealing plate 14 fit with the pores on the surface of the first conduit 16, keeping the first conduit 16 in a state where gas can flow.

[0061] The fan 241 is used to extract the gas in the sealing cover 20 through the first conduit 16 and create negative pressure through the through hole 21, so that the power source to be tested is fixed on the auxiliary workbench 1 to achieve the detection of the power source to be tested.

[0062] In this embodiment, refer to Figure 5 The electric energy meter calibration equipment also includes a reinforcement plate 2, a calibration table 3, an exhaust hood 31, an exhaust pipe 26, a regulating valve 38, a support frame 27 and a plurality of heat sinks 32; wherein,

[0063] The upper surface of the auxiliary workbench 1 is fixedly connected to the lower surface of the reinforcement plate 2. The front of the reinforcement plate 2 is provided with a plurality of calibration positions 3, and the calibration positions 3 are used to carry and calibrate the electric energy meter to be tested.

[0064] The exhaust port on the back side of the wind power device 24 is connected to the first end of the exhaust pipe 26 on the front side, the second end of the exhaust pipe 26 is connected to the back side of the exhaust hood 31, one end of the support frame 27 is fixedly connected to the lower surface of the auxiliary workbench 1, the other end of the support frame 27 is used to fix the exhaust pipe 26, the regulating valve 38 is arranged at the bottom end of the exhaust pipe 26, the front side of the exhaust hood 31 is fixedly connected to the back side of the reinforcement plate 2, the back side of the reinforcement plate 2 is provided with the plurality of heat sinks 32, and the positions of the plurality of heat sinks 32 correspond to the positions of the exhaust hood 31.

[0065] As a preferred solution, the electric energy meter calibration equipment further includes an alarm 35, a data storage module 34, a programmable power source 40, a temperature monitor 30, an error calculation module 39, a comparison analysis module 37 and a calibration connection module 36; wherein,

[0066] The data storage module 34 is used to store the pre-compiled verification scheme, wherein the pre-compiled verification scheme is completed before the verification.

[0067] The controller 33 is also used to read the calibration scheme from the data storage module 34 when calibrating the electric energy meter to be tested, and send a control signal to the program-controlled power source 40 according to the requirements of the control source parameters of the predefined calibration items corresponding to the electric energy meter to be tested.

[0068] The program-controlled power source 40 is used to send test power to the standard power meter and the verification connection module 36 according to the control signal, and send the test power to the power meter to be tested through the verification connection module 36. The standard power meter and the power meter to be tested feed back power pulses.

[0069] The calibration connection module 36 is used to obtain the test electric power of the programmable power source 40, send the test electric power to the electric energy meter to be tested, receive the electric energy pulse output by the electric energy meter to be tested according to the test electric power, and send the electric energy pulse output by the test electric power to the error calculation module 39.

[0070] The error calculation module 39 is used to count the seconds according to the electric energy pulses output by the standard electric energy meter and the electric energy pulses output by the electric energy meter to be tested, thereby calculating the error data of the electric energy meter to be tested, and sending the error data to the comparison and analysis module 37 and the data storage module 34.

[0071] The comparison and analysis module 37 is used to perform comparison and analysis based on the error data and the preset error limit value, obtain the verification result of the electric energy meter to be tested, and send the verification result to the data storage module 34. The error limit value is stored in the data storage module 34.

[0072] The temperature monitor 30 is used to detect the temperature data of the test site 3. When the temperature data of the test site 3 is abnormal, an alarm is sent to the controller 33, so that the controller 33 warns the alarm 35. The temperature monitor 30 is arranged on the front of the reinforcement plate 2, and the controller 33 is arranged on the left side of the auxiliary workbench 1. At the same time, as an example of an embodiment of the present invention, the present invention also provides a test system, and its principle schematic diagram is shown in FIG. Figure 7 .

[0073] Exemplarily, the fan 241 is also used to adjust its own power according to the temperature data and dissipate heat for the calibration table 3. In the implementation of the present application, since there is a power amplifier in the electric energy meter calibration equipment, the long-term operation of the calibration table or the excessive power will cause temperature fluctuations, resulting in deviations in the power amplifier, thereby causing errors. Therefore, the power of the fan 241 is adjusted according to the temperature data, which can effectively improve the use efficiency of the calibration table 3 on the one hand, and reduce the errors caused by temperature on the other hand.

[0074] In this embodiment, the electric energy meter calibration equipment further includes a three-way connection 17, a circulation pipe 19, a control valve 22, a third conduit 23 and two second conduits 18.

[0075] The first conduit 16 is a conduit in the vertical direction, the top end of the first conduit 16 is connected to the first end of the tee 17 (the first end of the tee 17 faces the ground in this embodiment), the second end and the third end of the tee 17 are respectively connected to the first ends of the two second conduits 18 (the second end and the third end of the tee 17 face the side in this embodiment), and the second ends of the two second conduits 18 are both connected to the first end of the circulation pipe 19 on the front side; wherein the first ends of the two second conduits 18 are opposite surfaces.

[0076] The outer surface of the circulation pipe 19 is connected to the lower surface of the sealing cover 20, and the upper surface of the circulation pipe 19 is connected to the lower surface of the sealing cover 20 through a joint.

[0077] The bottom end of the first conduit 16 is connected to the upper surface of the control valve 22 , the lower surface of the control valve 22 is connected to the first end of the third conduit 23 at the front, and the second end of the third conduit 23 at the back is connected to the air inlet of the wind power device 24 .

[0078] In order to enhance the stability and impact resistance of the electric energy meter calibration equipment, optionally, the electric energy meter calibration equipment also includes a positioning base plate 257, a reinforcement plate 29 and four supporting legs 28; wherein, the lower surface of the wind power device 24 is fixedly connected to the upper surface of the positioning base plate 257, and the lower surface of the positioning base plate 257 is fixedly connected to the front surface of the reinforcement plate 29.

[0079] The reinforcing plate 29 is designed to be in an I-shape, and the plane of the I-shape is parallel to the ground; the front and back sides of the reinforcing plate 29 are respectively connected to the four supporting legs 28 to fix the relative positions of the four supporting legs 28, thereby effectively improving the stability of the electric energy meter calibration equipment.

[0080] The tops of the four supporting legs 28 are fixedly connected to the four corners of the lower surface of the auxiliary workbench 1; wherein the auxiliary workbench 1 is rectangular.

[0081] The working process of the embodiment of the present invention includes: when using the electric energy meter calibration equipment, the power supply to be tested (or the power source to be tested) is placed on the surface of the auxiliary workbench 1, and the position is adjusted to be just above the auxiliary workbench 1 by moving the power source to be tested; the pressure sensor 4 moves downward under the action of pressure, and at this time, the pressure sensor 4 sends the detected pressure data about the power source to be tested to the controller 33, and the controller 33 starts the fan 241, the temperature monitor 30 and the control valve 22; the control valve 22 connects the first conduit 16 with the fan 241, and the calibration table 3 becomes hot with long-term operation, and the temperature monitor 30 sends an alarm to the controller 33, and the controller 33 warns the alarm 35; when the pressure sensor 4 moves downward, the elastic reset rod 6 drives the bottom plate 7 to move downward, so that the bottom plate 7 pulls the traction cable 12 through the positioning plate 8 during the movement, and the traction cable 12 is pulled by the positioning plate 8. When the cable 12 is pulled, it pulls the second positioning assembly 13 along the steering wheel 10, so that the second positioning assembly 13 drives the sealing plate 14 to move under the pulling of the traction cable 12, and the sealing plate 14 flips under the pulling action of the pin shaft 15 and the traction cable 12, and when the sealing plate 14 fits with the air holes on the surface of the first conduit 16, the surface of the first conduit 16 is sealed, and the first conduit 16 is kept in a state where gas can flow, and then the fan 241 can extract the gas between the through hole 21 and the power source to be tested through the first conduit 16, and the rotation speed of the fan 241 will increase with the adjustment of the temperature data and the controller 33, thereby improving the use efficiency of the electric energy meter calibration equipment, realizing the fixation of the power source to be tested, and finally completing the detection of the power source to be tested; after the detection is completed, the elastic reset rod 6 automatically resets, and the pressure sensor 4 also moves up and returns to its original position, which is convenient for the detection of the next power source to be tested.

[0082] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0083] The embodiment of the present invention provides an electric energy meter calibration device that can be used for power source testing, comprising an auxiliary workbench, a traction steel cable, a positioning plate, a pressure sensor, a sealing plate, a first conduit, a steering wheel, a second positioning assembly, a wind power device, a controller, a through hole and a sealing cover; wherein the sealing plate is adapted to the shape of the inner wall of the first conduit and the shape of the air holes opened on the outer surface; the wind power device comprises a fan; a plurality of through holes are provided on the upper surface of the auxiliary workbench, the upper surface of the sealing cover is connected to the lower surface of the auxiliary workbench, the auxiliary workbench is connected to the sealing cover through the through holes, and the sealing cover covers all the through holes within a vertical range; when calibrating the power source to be tested, the upper surface of the auxiliary workbench is used to carry the power source to be tested. The power source to be tested is provided with a pressure sensor for receiving pressure data corresponding to the power source to be tested and sending the pressure data to the controller so that the controller starts the fan. The pressure sensor is also used to move downward under the pressure of the power source to be tested so that the positioning plate pulls the traction cable, and the traction cable pulls the second positioning assembly along the steering wheel to drive the sealing plate to move, thereby making the sealing plate fit with the air holes on the surface of the first conduit. The fan is used to extract the gas in the sealing cover through the first conduit and create a negative pressure through the through hole so that the power source to be tested is fixed and the detection of the power source to be tested is realized. Compared with the prior art, the fan extracts the gas between the through hole and the power source to be tested to create a negative pressure state, adsorbs the power source to be tested and fixes it on the auxiliary workbench, improves the close contact between the power source to be tested and the auxiliary workbench during the measurement process, avoids loosening and dislocation, and thus ensures the stability of the measurement process of the power source to be tested and reduces errors.

[0084] Furthermore, a number of through holes are arranged on the surface of the auxiliary workbench, so that the electric energy meter calibration equipment can fix power sources of different specifications and volumes, without the need for staff to manually adjust the wind force and the placement of the power source to be tested, thereby reducing the difficulty of using the electric energy meter calibration equipment.

[0085] Furthermore, the temperature monitor sends an alarm to the controller, so that the controller alerts the alarm, and the fan adjusts its own power according to the temperature data, which greatly avoids the situation where long-term operation or excessive power during the use of the electricity meter calibration equipment causes deviations or temperature fluctuations in the internal power amplifier, reduces the error of the detection data caused by the amplification factor, and ensures the efficient use of the calibration table.

[0086] Furthermore, a working-shaped reinforcement plate is provided between the four supporting legs to fix the relative positions between the four supporting legs, thereby improving the stability and impact resistance of the electric energy meter calibration equipment.

[0087] Furthermore, the electric energy meter calibration equipment also includes an elastic reset rod. After the power source to be tested is tested, the position of the pressure sensor can be restored to facilitate the next test, thereby improving the use efficiency of the electric energy meter calibration equipment.

[0088] 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.

[0089] 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. An electric energy meter calibration device that can be used for power source testing, characterized in that: It includes an auxiliary workbench, a traction steel cable, a positioning plate, a pressure sensor, a sealing plate, a first conduit, a steering wheel, a second positioning assembly, a wind power device, a controller, a sealing cover and a plurality of through holes; wherein, The sealing plate is adapted to the shape of the inner wall of the first conduit and the shape of the air holes opened on the outer surface; the wind power device includes a fan; The upper surface of the auxiliary workbench is provided with the plurality of through holes, the upper surface of the sealing cover is connected to the lower surface of the auxiliary workbench, the auxiliary workbench is connected to the sealing cover through the through holes, and the sealing cover covers all the through holes within a vertical range; When the power source to be tested is calibrated, the upper surface of the auxiliary workbench is used to carry the power source to be tested, and the position of the power source to be tested covers no less than one of the through holes; The pressure sensor is used to receive pressure data corresponding to the power source to be tested, and send the pressure data to the controller so that the controller starts the fan; the pressure sensor is arranged on the upper surface of the auxiliary workbench; the electric energy meter calibration equipment also includes an elastic reset rod, a sliding hole and a bottom plate; the lower surface of the pressure sensor is connected to the top of the elastic reset rod, the outer surface of the elastic reset rod is connected to the inner wall of the sliding hole, and the bottom of the elastic reset rod is connected to the positioning plate through the bottom plate; wherein the sliding hole is opened on the upper surface of the auxiliary workbench; The pressure sensor is also used to move downward under the pressure of the power source to be measured, so that the positioning plate pulls the traction cable, and the traction cable pulls the second positioning assembly along the steering wheel, driving the sealing plate to move, thereby making the sealing plate fit with the air holes on the surface of the first conduit, keeping the first conduit in a state where gas can flow; The fan is used to extract the gas in the sealing cover through the first conduit and to create negative pressure through the through hole, so that the power source to be tested is fixed on the auxiliary workbench to achieve the detection of the power source to be tested.

2. The electric energy meter calibration equipment for power source testing according to claim 1, characterized in that: The electric energy meter verification equipment also includes a first positioning component, a pin shaft and a fixing rod; The front side of the positioning plate is fixedly connected to the back side of the first positioning component, the front side of the first positioning component is connected to one end of the traction cable, the other end of the traction cable passes through the steering wheel and is connected to the upper surface of the second positioning component, the lower surface of the second positioning component is connected to the upper surface of the sealing plate, and the back side of the sealing plate is hinged to the inner wall of the air hole opened on the outer surface of the first conduit through the pin shaft; wherein, the steering wheel is arranged in the fixing rod, and the top end of the fixing rod is connected to the lower surface of the auxiliary workbench.

3. The electric energy meter calibration equipment for power source testing according to claim 1, characterized in that: The electric energy meter calibration equipment also includes a reinforcement plate, a calibration table, an exhaust hood, an exhaust pipe, a regulating valve, a support frame and a plurality of heat sinks; wherein, The upper surface of the auxiliary workbench is connected to the lower surface of the reinforcement plate, and a plurality of calibration positions are arranged on the front of the reinforcement plate, and the calibration positions are used to carry the electric energy meter to be tested; The exhaust port on the back of the wind power device is connected to the first end of the exhaust pipe on the front, the second end of the exhaust pipe is connected to the back of the exhaust hood, one end of the support frame is connected to the lower surface of the auxiliary workbench, the other end of the support frame is used to fix the exhaust pipe, the regulating valve is arranged at the bottom end of the exhaust pipe, the front of the exhaust hood is fixedly connected to the back of the reinforcement plate, the back of the reinforcement plate is provided with the plurality of heat sinks, and the positions of the plurality of heat sinks correspond to the positions of the exhaust hood.

4. The electric energy meter calibration equipment for power source testing as claimed in claim 3, characterized in that: The electric energy meter calibration equipment also includes an alarm, a data storage module, a programmable power source, a temperature monitor, an error calculation module, a comparison analysis module and a calibration connection module; wherein, The data storage module is used to store pre-compiled verification schemes; The controller is also used to read the calibration scheme from the data storage module when calibrating the electric energy meter to be tested, and send a control signal to the program-controlled power source according to the predefined calibration item control source parameters corresponding to the electric energy meter to be tested; The program-controlled power source is used to send test electric power to the standard electric energy meter and the verification connection module according to the control signal, and send the test electric power to the electric energy meter to be tested through the verification connection module; The verification connection module is used to obtain the test electric power of the programmable power source, send the test electric power to the electric energy meter to be tested, receive the electric energy pulse output by the electric energy meter to be tested according to the test electric power, and send the electric energy pulse output by the test electric power to the error calculation module; The error calculation module is used to calculate the error data of the electric energy meter to be tested according to the electric energy pulse output by the standard electric energy meter and the electric energy pulse output by the electric energy meter to be tested, and send the error data to the comparison and analysis module and the data storage module; The comparison and analysis module is used to perform a comparison and analysis based on the error data and a preset error limit value, obtain a verification result of the electric energy meter to be tested, and send the verification result to the data storage module; wherein the error limit value is stored in the data storage module; The temperature monitor is used to detect the temperature data of the verification epitope. When the temperature data of the verification epitope is abnormal, an alarm is sent to the controller so that the controller alerts the alarm; wherein, the temperature monitor is arranged on the front side of the reinforcement plate, and the controller is arranged on the left side of the auxiliary workbench.

5. The electric energy meter calibration equipment for power source testing as claimed in claim 4, characterized in that: The fan is also used to adjust its own power according to the temperature data and to dissipate heat for the detection site.

6. The electric energy meter calibration equipment for power source testing as claimed in claim 3, characterized in that: The electric energy meter verification equipment also includes a tee, a circulation pipe, a control valve, a third conduit and two second conduits; The top end of the first conduit is connected to the first end of the tee, the second end and the third end of the tee are respectively connected to the first ends of the two second conduits, and the second ends of the two second conduits are both connected to the first end of the circulation pipe at the front side; wherein the first ends of the two second conduits are opposite surfaces; The outer surface of the circulation pipe is connected to the lower surface of the sealing cover, and the upper surface of the circulation pipe is connected to the lower surface of the sealing cover through a joint; The bottom end of the first conduit is connected to the upper surface of the control valve, the lower surface of the control valve is connected to the first end of the third conduit at the front, and the second end of the third conduit at the back is connected to the air inlet of the wind power device; The wind power device also includes a fixing seat, the upper surface of which is connected to the lower surface of the fan.

7. An electric energy meter calibration device for power source testing as claimed in any one of claims 1 to 6, characterized in that: The electric energy meter calibration equipment also includes a positioning base plate, a reinforcement plate and four supporting legs; wherein, The lower surface of the wind power device is connected to the upper surface of the positioning base plate, and the lower surface of the positioning base plate is connected to the front surface of the reinforcement plate; The reinforcing plate is in an I-shape, and the plane of the I-shape is parallel to the ground; the front and back sides of the reinforcing plate are respectively connected to the four supporting legs to fix the relative positions of the four supporting legs; The tops of the four supporting legs are connected to the four corners of the lower surface of the auxiliary workbench; wherein the auxiliary workbench is rectangular.

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