High-precision electric energy calibration device for electric energy measuring instrument

Abstract

The invention relates to the technical field of measuring instruments, and discloses a high-precision electric energy calibration device for an electric energy measuring instrument, which comprises a shell sleeve, an electric energy meter field calibration instrument and a detection probe, and is characterized in that the electric energy meter field calibration instrument is embedded in the surface of the shell sleeve, and the detection probe is electrically connected to the surface of the electric energy meter field calibration instrument; a centering adjusting mechanism is mounted on the surface of the shell sleeve; a user can rotate the two-way lead screw to synchronously drive the clamping plates to clamp the electric energy meter in the middle and drive the detection probe to be inserted into the socket of the electric energy meter, and compared with an existing fool type electric energy meter field calibration instrument, the step that the user positions the electric energy meter in the middle through two independent side edge fixing structures is omitted, and the use threshold of the user is lowered; the problem that an existing electric energy meter on-site calibration instrument is difficult to connect with an electric energy meter, and the use difficulty of a user is increased is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of measuring instruments, and in particular relates to a high-precision electric energy calibration device for electric energy metering instruments. Background Art

[0002] The energy meter is an instrument for measuring electric energy, used to record power generation, supply (inter-supply), plant power consumption, line loss and user power consumption. The calibration of the energy meter is an important part to ensure the accuracy and stability of energy measurement. The equipment that can calibrate the energy meter is mainly the energy meter field calibrator. This equipment is widely used in the field of power measurement to ensure the accuracy and reliability of the energy meter.

[0003] At present, a Chinese patent discloses a fool-proof electric energy meter field calibrator (authorization announcement number is CN112147565B). The present invention can be connected through a connecting hole so that an external cable can be connected to the electric energy meter. A display screen can be used to display the detected data. The visual glass makes it convenient for the operator to view the meter data of the electric energy meter. The connecting rod and the slider enable the clamping plate and the device to be connected to the electric energy meter without shaking. The pop-up rod can be reset, and the pressure plate and the lower pressure rod allow the snapping device to be released after snapping.

[0004] Since the above-mentioned device uses two separate side fixing structures plus a bottom fixing structure to lock the electric energy meter in the working box, during this process, the user first needs to adjust the two separate side fixing structures in the same way to reduce the connection error between the electric energy meter and the detector. This requires the user to have relatively sophisticated adjustment experience, increases the user's usage threshold, and is not convenient for the user to use easily. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the present invention provides a high-precision electric energy calibration device for electric energy metering instruments, which has the advantage of being able to conveniently and accurately connect an electric energy meter field calibrator with an electric energy meter, thereby solving the problem that it is difficult to connect an existing electric energy meter field calibrator with an electric energy meter, which increases the difficulty of use for users.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose of being able to conveniently and accurately connect the electric energy meter field calibrator with the electric energy meter, the present invention provides the following technical solutions:

[0009] A high-precision electric energy calibration device for an electric energy metering instrument comprises a shell, an electric energy meter field calibrator, and a detection probe. The electric energy meter field calibrator is embedded and installed on the surface of the shell, the detection probe is electrically connected to the surface of the electric energy meter field calibrator, and a centering adjustment mechanism is installed on the surface of the shell.

[0010] As a preferred solution of the high-precision electric energy calibration device for an electric energy metering instrument described in the present invention: a sliding cavity is opened on the inner side of the shell sleeve, and the centering adjustment mechanism includes a bidirectional lead screw rotatably connected to the inside of the sliding cavity, and the surfaces of the two opposite threads of the bidirectional lead screw are threadedly connected with a clamping plate, the surface of the bidirectional lead screw is fixedly connected with an active bevel gear, the surface of the active bevel gear is meshingly connected with a driven bevel gear, one end of the driven bevel gear is fixedly connected with a threaded column slidably connected to the sliding cavity, the surface of the threaded column is threadedly connected with an extrusion assembly, and the detection probe is fixedly connected to the inner side of the extrusion assembly; the centering adjustment mechanism also includes a first threaded assembly and a second threaded assembly, the structures of the first threaded assembly and the second threaded assembly are the same, the two first threaded assemblies are respectively threadedly connected to the surfaces of the two opposite threads of the bidirectional lead screw, the clamping plate is fixedly connected to one end of the first threaded assembly, the second threaded assembly is threadedly connected to the surface of the threaded column, and the extrusion assembly is fixedly connected to one end of the second threaded assembly.

[0011] Based on the above technical features: the user can rotate the bidirectional screw to synchronously drive the clamp to center the electric energy meter and drive the detection probe to be plugged into the socket of the electric energy meter. Compared with the existing fool-type electric energy meter field calibrator, this saves the user the step of centering the electric energy meter through two separate side fixing structures, lowers the user's usage threshold, and because the centering adjustment and bottom connection processes are carried out simultaneously, this can also save the time for precise connection of the detection probe and the electric energy meter socket, and has the advantage of being able to conveniently and accurately connect the electric energy meter field calibrator and the electric energy meter.

[0012] As a preferred solution of the high-precision electric energy calibration device for an electric energy metering instrument described in the present invention: the first threaded component includes a threaded sleeve threadedly connected to one of the threaded surfaces of the bidirectional lead screw, the surface of the threaded sleeve is rotatably connected to a sliding sleeve slidably connected to the sliding cavity, the clamping plate is fixedly connected to one end of the sliding sleeve, a positioning groove is opened inside the sliding sleeve, and a spring piece fixedly connected to the threaded sleeve is clamped inside the positioning groove.

[0013] Based on the above technical features: the design of the first threaded component and the second threaded component is adopted, when the clamp first clamps the electric energy meter in the center, the first threaded component can disconnect the connection between the two-way lead screw and the clamp, so that the two-way lead screw can continue to drive the detection probe close to the socket of the electric energy meter, and when the detection probe is successfully plugged into the socket of the electric energy meter, the second threaded component can also disconnect the connection between the detection probe and the two-way lead screw to avoid the detection probe from being too deep into the socket of the electric energy meter, so as to reduce the damage of the detection probe or the electric energy meter socket due to too deep plugging position or too large force; and when the first threaded component is unlocked, the staff can promptly feel the rotational frustration resistance transmitted by the spring piece entering and exiting the positioning groove to judge that the electric energy meter has been clamped in the center, and the staff does not need to actively calibrate the position of the electric energy meter. At the same time, when the second threaded component is unlocked, the staff can more clearly feel the rotational frustration resistance transmitted by the two-way lead screw, which can assist the staff to judge that the detection probe and the socket of the electric energy meter are plugged in place, and the staff does not need to stop to check, thereby reducing the installation burden of the staff and improving the installation efficiency of the staff.

[0014] As a preferred solution of the high-precision electric energy calibration device for an electric energy metering instrument described in the present invention: the extrusion assembly includes a positioning cylinder fixedly connected to a second threaded assembly, one end of the positioning cylinder is fixedly connected to an extrusion frame, the surface of the extrusion frame is provided with evenly distributed thread grooves, the internal thread of one of the thread grooves is connected to a bolt, and the surface of the bolt is rotatably connected to a positioning frame fixedly connected to the detection probe.

[0015] Based on the above technical features: this can meet the needs of staff to detect electric energy meters in different socket locations, so as to expand the overall scope of application of the device.

[0016] As a preferred solution of the high-precision electric energy calibration device for electric energy metering instruments described in the present invention: the number of the positioning grooves and the spring pieces are the same and no less than five, and the positioning grooves and the spring pieces are distributed in a ring shape around the axis of the threaded sleeve.

[0017] Based on the above technical features: this can increase the resistance to the disconnection of the threaded sleeve and the sliding sleeve to ensure that the clamping plate and the detection probe can be moved to the specified position.

[0018] As a preferred solution of the high-precision electric energy calibration device for an electric energy metering instrument described in the present invention: the cross-sectional shape of the spring piece is V-shaped, and the cross-sectional shape of the positioning groove is an isosceles triangle.

[0019] Based on the above technical features: this can reduce the resistance of the spring piece entering and exiting the positioning groove, so as to ensure that the threaded sleeve and the sliding sleeve can be separated normally.

[0020] As a preferred solution of the high-precision electric energy calibration device for electric energy metering instruments described in the present invention: the surface of the threaded sleeve is provided with reserved grooves distributed in an annular shape, and both ends of the spring piece are fixedly connected to the reserved grooves.

[0021] Based on the above technical features: this can reserve sufficient expansion space for the spring piece to ensure that the spring piece can enter the positioning groove normally.

[0022] As a preferred solution of the high-precision electric energy calibration device for electric energy metering equipment described in the present invention: the cross-sectional shapes of the sliding sleeve, the sliding cavity and the sliding sleeve are all matching rectangles.

[0023] Based on the above technical features: this can prevent the sleeve from rotating to ensure that the clamp can clamp the electric energy meter horizontally.

[0024] As a preferred solution of the high-precision electric energy calibration device for electric energy metering instruments described in the present invention: one end of the extrusion frame is provided with evenly distributed locking grooves, and one end of the positioning frame is fixedly connected with a positioning column plugged into one of the locking grooves.

[0025] Based on the above technical features: this can prevent the positioning frame from tilting or rotating, so as to ensure that the detection probe can be inserted into the socket of the electric energy meter more accurately.

[0026] As a preferred solution of the high-precision electric energy calibration device for electric energy metering instruments described in the present invention: the active bevel gear, driven bevel gear, threaded column, second threaded assembly and positioning cylinder are all used in combination and are two in number, and the two positioning cylinders are symmetrically distributed on both sides of the axis of the extrusion frame.

[0027] Based on the above technical features: this can ensure that the extrusion frame can drive the detection probe to move horizontally, further improving the accuracy of inserting the detection probe into the power meter socket.

[0028] As a preferred solution of the high-precision electric energy calibration device for electric energy metering instruments described in the present invention: rollers are embedded and installed on the inner side of the shell and the opposite ends of the two clamping plates.

[0029] Based on the above technical features: this can reduce the resistance of the electric energy meter to sliding relative to the shell between the clamping plate and the shell, so as to reduce the probability of gaps between the electric energy meter, the shell and the extrusion frame.

[0030] (III) Beneficial effects

[0031] Compared with the prior art, the present invention provides a high-precision electric energy calibration device for electric energy metering instruments, which has the following beneficial effects:

[0032] The user can rotate the bidirectional lead screw to synchronously drive the clamping plate to center the electric energy meter and drive the detection probe to plug into the socket of the electric energy meter. Compared with the existing fool-type electric energy meter field calibrator, this saves the user from the step of centering the electric energy meter through two separate side fixing structures, lowering the user's usage threshold. In addition, since the centering adjustment and bottom connection processes are carried out simultaneously, this can also save the time for accurate connection of the detection probe and the electric energy meter socket, and has the advantage of being able to conveniently and accurately connect the electric energy meter field calibrator with the electric energy meter.

[0033] The design of the first threaded component and the second threaded component is adopted. When the clamping plate first clamps the electric energy meter in the center, the first threaded component can disconnect the connection between the bidirectional lead screw and the clamping plate, so that the bidirectional lead screw can continue to drive the detection probe close to the socket of the electric energy meter. When the detection probe is successfully plugged into the socket of the electric energy meter, the second threaded component can also disconnect the connection between the detection probe and the bidirectional lead screw to prevent the detection probe from being inserted too deeply into the socket of the electric energy meter, so as to reduce the damage of the detection probe or the electric energy meter socket due to too deep plugging position or too strong force;

[0034] And when the first threaded component is unlocked, the staff can promptly feel the rotational resistance transmitted by the spring clip entering and exiting the positioning groove to determine that the electricity meter has been clamped in the center, and the staff does not need to actively calibrate the position of the electricity meter. At the same time, when the second threaded component is unlocked, the staff can more clearly feel the rotational resistance transmitted by the bidirectional lead screw, which can assist the staff in determining that the detection probe and the socket of the electricity meter are properly plugged in, and the staff does not need to stop to check, thereby reducing the installation burden of the staff and improving the installation efficiency of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the electric energy meter field tester in the present invention being placed downward;

[0036] Figure 2 It is a schematic diagram of the electric energy meter field tester in the present invention being placed upward;

[0037] Figure 3 It is a horizontal cross-sectional schematic diagram of the electric energy meter field tester of the present invention in a downwardly placed state;

[0038] Figure 4 It is a vertical cross-sectional schematic diagram of the electric energy meter field tester of the present invention in a downwardly placed state;

[0039] Figure 5 for Figure 4 A magnified view of middle;

[0040] Figure 6 It is a structural schematic diagram of a partial cutout of the centering adjustment mechanism in the present invention;

[0041] Figure 7 It is a partial cutaway diagram of the bidirectional lead screw structure and the first threaded component in the present invention;

[0042] Figure 8 It is a partial cross-sectional schematic diagram of the bidirectional lead screw structure and the first threaded component in the present invention;

[0043] Fig. 9 It is a partial cutaway diagram of the bidirectional lead screw structure and the first threaded component in the present invention.

[0044] In the figure: 100, shell; 110, sliding cavity; 200, electric energy meter field calibrator; 300, detection probe; 400, centering adjustment mechanism; 410, bidirectional screw; 420, first threaded component; 421, threaded sleeve; 422, sliding sleeve; 423, positioning groove; 424, spring piece; 425, reserved groove; 430, clamp; 440, active bevel gear; 450, driven bevel gear; 460, threaded column; 470, second threaded component; 480, extrusion component; 481, positioning cylinder; 482, extrusion frame; 483, threaded groove; 484, bolt; 485, positioning frame; 486, locking groove; 487, positioning column; 490, roller shaft. DETAILED DESCRIPTION

[0045] 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.

[0046] See also Figure 1 - Fig. 9 , the present invention provides a technical solution:

[0047] A high-precision electric energy calibration device for electric energy metering equipment comprises a housing 100, an electric energy meter field calibrator 200, and a detection probe 300. The electric energy meter field calibrator 200 is embedded and installed on the surface of the housing 100. The detection probe 300 is electrically connected to the surface of the electric energy meter field calibrator 200. A centering adjustment mechanism 400 is installed on the surface of the housing 100.

[0048] The detection principle of the electric energy meter field calibrator 200 is based on a precise signal acquisition and processing system. The current and voltage are measured respectively through the built-in clamp-on current transformer and precision resistor divider in the electric energy meter field calibrator 200. The built-in single-chip digital signal processor in the electric energy meter field calibrator 200 is used to perform analog-to-digital conversion and data processing, so as to realize accurate calibration of the electric energy meter and AC power parameters.

[0049] Detection principle: first, connect the electric energy meter field calibrator 200 to the electric energy meter through the detection probe 300, then start the verification program through the built-in single-chip digital signal processor in the electric energy meter field calibrator 200, input parameters automatically or manually, and perform real-time data collection; then the built-in single-chip digital signal processor in the electric energy meter field calibrator 200 analyzes and processes the collected data, and calculates the measurement error of the electric energy meter; finally, the built-in single-chip digital signal processor in the electric energy meter field calibrator 200 determines the performance of the electric energy meter according to the results and generates a detection report.

[0050] It should be noted that the power meter field calibrator 200 and the detection probe 300 in the above description are both relatively mature devices in existing technology applications. The specific models can be selected according to actual needs. At the same time, the power meter field calibrator 200 can be powered by a built-in power supply or by AC power. The specific power supply method is selected according to the situation and will not be elaborated here.

[0051] like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, a sliding cavity 110 is opened on the inner side of the shell 100, and the centering adjustment mechanism 400 includes a bidirectional lead screw 410, two first threaded components 420, two clamping plates 430, a driving bevel gear 440, a driven bevel gear 450, a threaded column 460, a second threaded component 470 and an extrusion component 480. The bidirectional lead screw 410 is rotatably connected to the inside of the sliding cavity 110, and the two first threaded components 420 are respectively threadedly connected to the surfaces of two opposite threads on the surface of the bidirectional lead screw 410, the clamping plate 430 is fixedly connected to one end of the first threaded component 420, the driving bevel gear 440 is fixedly connected to the surface of the bidirectional lead screw 410, and the driven bevel gear 450 is meshedly connected to the driving bevel gear 440. The surface of the movable bevel gear 440, the threaded column 460 is fixedly connected to one end of the driven bevel gear 450, and the threaded column 460 is rotatably connected to the inside of the sliding cavity 110, the second threaded component 470 is threadedly connected to the surface of the threaded column 460, the extrusion component 480 is fixedly connected to one end of the second threaded component 470, the detection probe 300 is fixedly connected to the inner side of the extrusion component 480, and the bidirectional lead screw 410 passes through one end of the shell sleeve 100 and is fixedly connected to a foldable crank. The staff can rotate the bidirectional lead screw 410 more easily through the foldable crank to increase the burden of locking and unlocking the electric energy meter; the inner side of the shell sleeve 100 and the opposite ends of the two splints 430 are embedded with rollers 490.

[0052] When the staff needs to quickly connect the electric energy meter with the detection probe 300, the staff first puts the shell 100 on the surface of the electric energy meter, and aligns the end of the detection probe 300 with the socket of the electric energy meter, and then rotates the bidirectional lead screw 410 in the corresponding direction. The bidirectional lead screw 410 drives the two first threaded components 420 to move toward each other through two opposite threads, and the two first threaded components 420 drive the two clamping plates 430 to move toward each other until the electric energy meter is clamped in the center;

[0053] During the rotation of the bidirectional lead screw 410, the bidirectional lead screw 410 synchronously drives the active bevel gear 440 to rotate, the active bevel gear 440 drives the driven bevel gear 450 to rotate in opposite directions, the driven bevel gear 450 drives the threaded column 460 to rotate, the threaded column 460 drives the second threaded component 470 to move by rotation, the second threaded component 470 drives the extrusion component 480 to approach the electric energy meter, and the extrusion component 480 drives the detection probe 300 to approach the socket of the electric energy meter until the detection probe 300 is plugged into the socket of the electric energy meter.

[0054] like Figure 7 , Figure 8 and Fig. 9 As shown, the structures of the first thread assembly 420 and the second thread assembly 470 are the same. The first thread assembly 420 includes a threaded sleeve 421 threadedly connected to one of the threaded surfaces of the bidirectional lead screw 410. The surface of the threaded sleeve 421 is rotatably connected to a sliding sleeve 422 slidably connected to the sliding cavity 110. The clamping plate 430 is fixedly connected to one end of the sliding sleeve 422. A positioning groove 423 is provided inside the sliding sleeve 422. The positioning groove 423 is internally clamped with a spring 424 fixedly connected to the threaded sleeve 421. ; The number of the positioning grooves 423 and the number of the spring pieces 424 are the same and not less than five, and the positioning grooves 423 and the spring pieces 424 are distributed in a ring shape around the axis of the threaded sleeve 421; the cross-sectional shape of the spring piece 424 is V-shaped, and the cross-sectional shape of the positioning groove 423 is an isosceles triangle; the surface of the threaded sleeve 421 is provided with a ring-shaped reserved groove 425, and both ends of the spring piece 424 are fixedly connected to the reserved groove 425; the cross-sectional shapes of the sliding sleeve 422, the sliding cavity 110 and the sliding sleeve 422 are all matching rectangles;

[0055] When the two clamps 430 cooperate to clamp the electric energy meter, the clamps 430 cannot move further, and the clamps 430 block the movement of the sliding sleeve 422. At this time, the sliding sleeve 422 blocks the spring piece 424 through the positioning groove 423. However, the two-way screw 410 drives the spring piece 424 to rotate in and out of the positioning groove 423 through the threaded sleeve 421. The staff can promptly feel the rotational setback resistance transmitted by the spring piece 424 entering and exiting the positioning groove 423 to determine that the electric energy meter has been clamped in the center, and the staff does not need to actively calibrate the position of the electric energy meter. At this time, the two-way screw 410 can still rotate, which ensures that the two-way screw 410 can continue to rotate. Continue to drive the detection probe 300 closer to the socket of the electric energy meter. When the detection probe 300 and the socket of the electric energy meter are plugged in place and the extrusion assembly 480 and the electric energy meter are squeezed together, the extrusion assembly 480 prevents the sleeve 422 in the second threaded assembly 470 from rotating. The spring piece 424 in the second threaded assembly 470 also transmits rotational resistance to the bidirectional lead screw 410 when entering and exiting the corresponding positioning groove 423. At this time, the staff can more clearly feel the rotational resistance transmitted by the bidirectional lead screw 410, which can assist the staff in determining that the detection probe 300 and the socket of the electric energy meter are plugged in place.

[0056] like Figure 4 , Figure 5 and Figure 6 As shown, the extrusion assembly 480 includes a positioning cylinder 481 fixedly connected to the second threaded assembly 470, one end of the positioning cylinder 481 is fixedly connected to an extrusion frame 482, the surface of the extrusion frame 482 is provided with evenly distributed thread grooves 483, the internal thread of one of the thread grooves 483 is connected to a bolt 484, and the surface of the bolt 484 is rotatably connected to a positioning frame 485 fixedly connected to the detection probe 300; one end of the extrusion frame 482 is provided with evenly distributed locking grooves 486, and one end of the positioning frame 485 is fixedly connected to a positioning column 487 plugged into one of the locking grooves 486; the active bevel gear 440, the driven bevel gear 450, the threaded column 460, the second threaded assembly 470 and the positioning cylinder 481 are all used in combination and are two in number, and the two positioning cylinders 481 are symmetrically distributed on both sides of the axis of the extrusion frame 482;

[0057] When the staff needs to detect the electric energy meter at different socket positions, the staff first unscrews the bolt 484 from the corresponding threaded groove 483. At this time, the bolt 484 drives the positioning frame 485 and the positioning column 487 to disengage from the locking groove 486. At this time, the detection probe 300 loses its obstruction, and the staff can move the detection probe 300 to a position aligned with the electric energy meter socket, and align the bolt 484 and the positioning column 487 with the corresponding threaded groove 483 and the locking groove 486 respectively, and then screw the bolt 484 into the threaded groove 483. When the bolt 484 drives the positioning frame 485 to be tightly connected with the extrusion frame 482, the detection probe 300 can be firmly locked in the corresponding position on the inside of the extrusion frame 482 to meet the connection requirements of the detection probe 300 for different socket positions of the electric energy meter.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision electric energy calibration device for electric energy metering equipment, comprising a housing (100), an electric energy meter field calibrator (200), and a detection probe (300), wherein the electric energy meter field calibrator (200) is embedded and installed on the surface of the housing (100), and the detection probe (300) is electrically connected to the surface of the electric energy meter field calibrator (200), characterized in that: A centering adjustment mechanism (400) is installed on the surface of the shell (100); A sliding cavity (110) is provided on the inner side of the shell (100), and the centering adjustment mechanism (400) includes a bidirectional lead screw (410) rotatably connected to the inside of the sliding cavity (110), and the surfaces of the two opposite threads of the bidirectional lead screw (410) are both threadedly connected with a clamping plate (430), and the surface of the bidirectional lead screw (410) is fixedly connected with an active bevel gear (440), and the surface of the active bevel gear (440) is meshingly connected with a driven bevel gear (450), and one end of the driven bevel gear (450) is fixedly connected with a threaded column (460) slidably connected to the sliding cavity (110), and the surface of the threaded column (460) is threadedly connected with an extrusion assembly (480), and the detection probe (300) is fixedly connected to the inner side of the extrusion assembly (480).

2. A high-precision electric energy calibration device for electric energy measuring instruments as claimed in claim 1, characterized in that: The centering adjustment mechanism (400) further comprises two first threaded components (420) and two second threaded components (470), the first threaded components (420) and the second threaded components (470) having the same structure, the two first threaded components (420) being respectively threadedly connected to the surfaces of two opposite threads of the bidirectional lead screw (410), the clamping plate (430) being fixedly connected to one end of the first threaded component (420), the second threaded component (470) being threadedly connected to the surface of the threaded column (460), and the extrusion component (480) being fixedly connected to one end of the second threaded component (470); Among them, the first threaded component (420) includes a threaded sleeve (421) threadedly connected to one of the threaded surfaces of the bidirectional screw (410), the surface of the threaded sleeve (421) is rotatably connected to a sliding sleeve (422) slidably connected to the sliding cavity (110), the clamping plate (430) is fixedly connected to one end of the sliding sleeve (422), a positioning groove (423) is provided inside the sliding sleeve (422), and a spring piece (424) fixedly connected to the threaded sleeve (421) is clamped inside the positioning groove (423).

3. A high-precision electric energy calibration device for electric energy measuring instruments as claimed in claim 2, characterized in that: The extrusion assembly (480) includes a positioning cylinder (481) fixedly connected to the second threaded assembly (470), one end of the positioning cylinder (481) is fixedly connected to an extrusion frame (482), the surface of the extrusion frame (482) is provided with evenly distributed thread grooves (483), the internal thread of one of the thread grooves (483) is connected to a bolt (484), and the surface of the bolt (484) is rotatably connected to a positioning frame (485) fixedly connected to the detection probe (300).

4. A high-precision electric energy calibration device for electric energy measuring instruments as claimed in claim 2, characterized in that: The number of the positioning grooves (423) and the number of the spring pieces (424) are the same and are no less than five. The positioning grooves (423) and the spring pieces (424) are distributed in a ring shape around the axis of the threaded sleeve (421).

5. A high-precision electric energy calibration device for electric energy measuring instruments as claimed in claim 4, characterized in that: The cross-sectional shape of the spring sheet (424) is V-shaped, and the cross-sectional shape of the positioning groove (423) is an isosceles triangle.

6. A high-precision electric energy calibration device for electric energy metering equipment as claimed in claim 5, characterized in that: The surface of the threaded sleeve (421) is provided with reserved grooves (425) distributed in an annular shape, and both ends of the spring piece (424) are fixedly connected to the reserved grooves (425).

7. A high-precision electric energy calibration device for electric energy measuring instruments as claimed in claim 2, characterized in that: The cross-sectional shapes of the sliding sleeve (422), the sliding cavity (110) and the sliding sleeve (422) are all matching rectangles.

8. A high-precision electric energy calibration device for electric energy measuring instruments as claimed in claim 3, characterized in that: One end of the extrusion frame (482) is provided with evenly distributed locking grooves (486), and one end of the positioning frame (485) is fixedly connected with a positioning column (487) plugged into one of the locking grooves (486).

9. A high-precision electric energy calibration device for electric energy measuring instruments as claimed in claim 8, characterized in that: The active bevel gear (440), the driven bevel gear (450), the threaded column (460), the second threaded assembly (470) and the positioning cylinder (481) are all used in combination and are two in number. The two positioning cylinders (481) are symmetrically distributed on both sides of the axis of the extrusion frame (482).

10. The high-precision electric energy calibration device for electric energy metering equipment according to claim 1, characterized in that: Roller shafts (490) are embedded and installed on the inner side of the shell (100) and the opposite ends of the two clamping plates (430).

Images