Electric energy meter calibrating device

Abstract

The invention relates to the technical field of electric energy meter verification, and discloses an electric energy meter verification device, which comprises a verification main body, the front end of the verification main body is provided with a temperature measurement part, and the rear end of the verification main body is provided with a line connection end; the cleaning assembly comprises a cleaning part, the cleaning assembly is arranged above the verification main body in a sliding mode, and the cleaning part abuts against the upper surface of the verification main body and is used for cleaning a button and a screen on the upper surface of the verification main body; the locking assembly is arranged on the rear end face of the cleaning assembly and used for locking the cleaning assembly and preventing the cleaning assembly from sliding; the locking assembly is arranged on the protection assembly, and the protection assembly is arranged on the rear side of the line connecting end and used for covering the line connecting end to prevent the line connecting end from making contact with the outside. According to the electric energy meter calibrating device provided by the invention, dust on the calibrating main body can be cleaned, the dust can be prevented from invading the line connecting end of the calibrating main body, and the cleanliness is ensured, so that the reliability of calibrated data is ensured.

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. Background Art

[0002] The electric energy meter is a device used to detect electric energy. It has the characteristics of high measurement accuracy and short conversion time. Repeated measurements on it can reduce various interference factors and reduce accidental interference and errors. When the electric energy meter is in use, a calibration device is usually required to calibrate the electric energy meter.

[0003] Nowadays, the calibration of electric energy can be made more accurate through the use of calibration devices. However, after long-term use, the calibration devices are prone to dust accumulation, which not only covers its buttons and screens, but also invades the line connection ends, easily affecting the accuracy of the electric energy meter calibration, and the data obtained from the calibration is unreliable. Summary of the invention

[0004] The purpose of the present invention is to provide an electric energy meter calibration device, which can clean the dust on the calibration body and prevent the dust from invading the line connection end of the calibration body, thereby ensuring the cleanliness and thus ensuring the reliability of the calibration data.

[0005] In order to achieve the above object, the present invention provides an electric energy meter calibration device, comprising:

[0006] A test body, wherein the front end of the test body has a temperature measuring part, and the rear end of the test body has a line connection end;

[0007] A cleaning component, the cleaning component comprising a cleaning part, the cleaning component is slidably disposed above the testing body, the cleaning part abuts against the upper surface of the testing body, and is used to clean buttons and a screen on the upper surface of the testing body;

[0008] A locking assembly, which is arranged on the rear end surface of the cleaning assembly and is used to lock the cleaning assembly to prevent the cleaning assembly from sliding;

[0009] A protection component, wherein the locking component is arranged on the protection component, and the protection component is arranged on the rear side of the line connection end, and is used to cover the line connection end to prevent the line connection end from contacting the outside.

[0010] Furthermore, the cleaning component also includes an end cover, a clearance groove is provided on the end cover, a sliding bar extending along the front-to-back direction is provided on the end cover, the sliding bar is located on both sides of the clearance groove in the front-to-back direction, a sliding groove is provided on the inspection body along the front-to-back direction, the sliding groove is slidably connected with the sliding bar, the cleaning part includes a brush, the brush is arranged on the rear side groove wall of the clearance groove, and the lower end of the brush protrudes from the clearance groove.

[0011] Furthermore, the locking assembly includes a locking shell, a fixing strip and a locking block, the locking shell being fixedly arranged on the upper end surface of the protective assembly, the locking shell having a accommodating cavity, the front end surface of the locking shell being provided with an opening, the locking shell being provided with a locking groove, the locking groove being located on the side wall adjacent to the opening, the accommodating cavity, the opening and the locking groove being connected to each other, the fixing strip being fixed on the rear end surface of the end cover, the fixing strip being able to be accommodated in the accommodating cavity through the opening, the locking block being movably arranged on the fixing strip, and the locking block being removably snapped into the locking groove.

[0012] Furthermore, the locking assembly also includes an elastic connecting member, and the locking groove includes a first groove body and a second groove body, the first groove body extends in the front-to-back direction, the second groove body extends in the up-down direction, the lower end of the second groove body is connected to the rear end of the first groove body, and the two ends of the elastic connecting member are respectively connected to the fixing strip and the locking block, the locking block passes through the locking groove from the accommodating cavity, and the locking block is slidably disposed in the first groove body and the second groove body.

[0013] Furthermore, the protective assembly includes a protective shell and a protective plate, the protective shell having a through slot, the front end of the protective shell having a first opening, the rear end of the protective shell having a second opening, the first opening and the second opening are both connected to the through slot, the protective plate is hinged to the rear end face of the protective shell to cover the second opening, the front end of the protective shell is fixedly connected to the rear end face of the calibration body, the first opening is opposite to the line connection end, and a gasket is provided on the end face of the protective plate close to the through slot.

[0014] Furthermore, the protective assembly also includes a locking portion, which includes a first locking block, a second locking block, a locking spring and a card block, the first locking block is arranged on the side wall of the protective shell, the first locking block has a first cavity, and a first opening and a second opening are respectively opened on the rear end surface of the first locking block and on the side wall facing away from the protective shell, the first opening and the second opening are both connected to the first cavity, the second locking block includes a connecting block and an insert block connected to each other, the connecting block is placed on the side wall of the protective plate, the insert block has a second cavity, and a third opening is opened on the side wall of the insert block facing away from the protective plate, the third opening is connected to the second cavity, one end of the locking spring is connected to the inner wall of the second cavity close to the protective plate, the other end of the locking spring is connected to the card block, the card block protrudes from the third opening, and when the protective plate covers the second opening, the insert block is inserted into the first cavity, and the card block passes through the first cavity and out of the second opening.

[0015] Furthermore, when the protective plate covers the second opening, the blocking block is a wedge-shaped block with a thickness gradually increasing from front to back.

[0016] Furthermore, the electric energy meter calibration body also includes a shock absorbing assembly, which includes a shock absorbing plate, an anti-collision panel is provided on the outer edge of the shock absorbing plate, a damper is provided on the upper end surface of the shock absorbing plate, the outer shell of the damper is connected to the upper end surface of the shock absorbing plate, the piston rod of the damper extends upward and is connected to the bottom of the calibration body, the outer periphery of the piston rod is provided with a shock absorbing spring, and the two ends of the shock absorbing spring are respectively connected to the outer shell of the damper and the bottom of the calibration body.

[0017] Compared with the prior art, the advantageous effects of an electric energy meter calibration body according to an embodiment of the present invention are as follows: a cleaning component is slidably arranged above the calibration body, a cleaning portion abuts against the upper mark of the calibration body, and the cleaning portion can clean the buttons and screen of the calibration body when sliding with the cleaning component; when not in use, the cleaning component cover is arranged above the calibration body to prevent dust from directly contacting the buttons and screen; when it is needed, the cleaning component slides, and the cleaning portion cleans the buttons and screen, ensuring that the user can have a good user experience with cleanliness when using the calibration body; the protective component covers the line connection end of the calibration body to prevent dust from invading the line connection end, thereby ensuring the reliability of the data obtained by calibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall structural diagram of an electric energy meter verification device according to an embodiment of the present invention;

[0019] Figure 2 is an exploded view of an electric energy meter verification device according to an embodiment of the present invention;

[0020] Figure 3 is an exploded view of a cleaning component of an electric energy meter verification device according to an embodiment of the present invention;

[0021] Figure 4 It is an exploded view of a fixing bar, an elastic connecting piece, and a locking block of an electric energy meter verification device according to an embodiment of the present invention;

[0022] Figure 5 It is an exploded view of the locking housing and the protective assembly of the electric energy meter verification device according to the embodiment of the present invention;

[0023] Figure 6 It is a structural schematic diagram of a locking housing, a protective housing, and a protective plate of an electric energy meter verification device according to an embodiment of the present invention;

[0024] Figure 7 is an exploded view of a locking portion of an electric energy meter verification device according to an embodiment of the present invention;

[0025] Figure 8 It is an exploded view of the anti-vibration component of the electric energy meter verification device according to the embodiment of the present invention.

[0026] In the figure, 1, the calibration body; 11, the temperature measuring part; 12, the line connection end; 13, the slide;

[0027] 2. Cleaning assembly; 21. Cleaning unit; 211. Brush; 22. End cover; 221. Gap slot; 222. Slide bar;

[0028] 3. Locking assembly; 31. Locking housing; 311. Accommodating cavity; 312. Opening; 313. Locking groove; 3131. First groove body; 3132. Second groove body; 32. Fixing strip; 33. Locking block; 34. Elastic connecting member;

[0029] 4. Protective assembly; 41. Protective shell; 411. Through slot; 412. First opening; 413. Second opening; 42. Protective plate; 43. Gasket; 44. Locking part; 441. First locking block; 4411. First cavity; 4412. First opening; 4413. Second opening; 442. Second locking block; 4421. Connecting block; 4422. Inserting block; 44221. Second cavity; 44222. Third opening; 443. Locking spring; 444. Block;

[0030] 5. Shock-absorbing assembly; 51. Shock-absorbing plate; 52. Anti-collision panel; 53. Damper; 54. Shock-absorbing spring. DETAILED DESCRIPTION

[0031] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0032] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0033] In the description of the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", "lateral", "longitudinal" and the like used to indicate the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only used to facilitate the description of the present invention and simplify the description, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. For those of ordinary skill in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0034] In the description of the present invention, the terms "provided with", "set", "connected", and "placed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0036] The technical solution of the present invention is further described below in conjunction with embodiments and drawings.

[0037] like Figure 1 , 2 As shown, an electric energy meter calibration device according to an embodiment of the present invention includes:

[0038] A test body 1, wherein the front end of the test body 1 has a temperature measuring part 11, and the rear end of the test body 1 has a line connection end 12;

[0039] The cleaning component 2 includes a cleaning portion 21, which is slidably disposed above the test body 1. The cleaning portion 21 abuts against the upper surface of the test body 1 and is used to clean the buttons and screen on the upper surface of the test body 1;

[0040] A locking assembly 3, which is arranged on the rear end surface of the cleaning assembly 2 and is used to lock the cleaning assembly 2 to prevent the cleaning assembly 2 from sliding;

[0041] The protection component 4 and the locking component 3 are arranged on the protection component 4. The protection component 4 is arranged at the rear side of the line connection end 12 and is used to cover the line connection end 12 to prevent the line connection end 12 from contacting the outside.

[0042] Based on the above technical solution, the cleaning component 2 is slidably arranged above the calibration body 1, and the cleaning part 21 abuts against the upper mark of the calibration body 1. The cleaning part 21 can clean the buttons and screen of the calibration body 1 when sliding with the cleaning component 2. When not in use, the cleaning component 2 is covered above the calibration body 1 to prevent dust from directly contacting the buttons and screen. When it is needed, the cleaning component 2 slides and the cleaning part 21 cleans the buttons and screen to ensure that the user can have a good user experience with cleanliness when using the calibration body 1; the protective component 4 covers the line connection terminal 12 of the calibration body 1 to prevent dust from invading the line connection terminal 12, thereby ensuring the reliability of the data obtained by calibration.

[0043] Preferably, if Figure 2 , 3 As shown, the cleaning component 2 also includes an end cover 22, on which a clearance groove 221 is provided, and a slide bar 222 extending in the front-to-back direction is provided on the end cover 22, and the slide bar 222 is located on both sides of the clearance groove 221 in the front-to-back direction, and a slide groove 13 is provided in the front-to-back direction on the calibration body 1, and the slide groove 13 is slidably connected with the slide bar 222, and the cleaning part 21 includes a brush 211, and the brush 211 is arranged on the rear side groove wall of the clearance groove 221, and the lower end of the brush 211 protrudes from the clearance groove 221. When the end cover 22 slides on the calibration body 1, the lower end of the brush 211 passes over the buttons and screen of the calibration body 1, which can effectively clean the dust on the buttons and screen, ensure the cleanliness and improve the user's operating experience.

[0044] More preferably, if Figure 4 , 5 As shown in , 6, the locking assembly 3 includes a locking shell 31, a fixing strip 32 and a locking block 33. The locking shell 31 is fixedly arranged on the upper end surface of the protective assembly 4. The locking shell 31 has a receiving cavity 311. The front end surface of the locking shell 31 is provided with an opening 312. A locking groove 313 is provided on the locking shell 31. The locking groove 313 is located on the side wall adjacent to the opening 312. The receiving cavity 311, the opening 312 and the locking groove 313 are connected to each other. The fixing strip 32 is fixed on the rear end surface of the end cover 22. The fixing strip 32 can be accommodated in the receiving cavity 311 through the opening 312. The locking block 33 is movably arranged on the fixing strip 32. The locking block 33 can be detachably snapped into the locking groove 313. When the locking block 33 is snapped into the locking groove 313, the end cover 22 cannot slide relative to the locking shell 31. At this time, the end cover 22 protects the buttons and screen of the calibration body 1. When the locking block 33 is disengaged from the locking groove 313, the end cover 22 can slide on the calibration body 1, which is convenient and quick to use.

[0045] More preferably, if Figure 6As shown, the locking assembly 3 also includes an elastic connecting member 34, and the locking groove 313 includes a first groove body 3131 and a second groove body 3132. The first groove body 3131 extends in the front-to-back direction, and the second groove body 3132 extends in the up-down direction. The lower end of the second groove body 3132 is connected to the rear end of the first groove body 3131, and the two ends of the elastic connecting member 34 are respectively connected to the fixing strip 32 and the locking block 33. The locking block 33 passes through the locking groove 313 from the accommodating cavity 311, and the locking block 33 is slidably set in the first groove body 3131 and the second groove body 3132.

[0046] Specifically, the elastic connecting member 34 includes a first connecting tube, a locking spring, and a second connecting tube which are sequentially connected from top to bottom.

[0047] Specifically, the elastic connecting piece 34 is always in an elongated state in the locking groove 313, and the user manually slides the locking block 33 protruding from the locking groove 313, from the first groove body 3131 to the end of the second groove body 3132 away from the first groove body 3131. At this time, the force exerted on the locking block 33 is the elastic force of the elastic connecting piece 34 toward the fixed plate, and the sliding of the end cover 22 is locked by the elastic force; the user manually slides the locking block 33 protruding from the locking groove 313, from the end of the second groove body 3132 away from the first groove body 3131 to the end of the first groove body 3131 away from the second groove body 3132. Since the first groove body 3131 does not restrict the locking block 33 in the front and rear directions, the locking block 33 does not have a locking effect on the end cover 22. At this time, the end cover 22 can slide relative to the locking shell 31, that is, the end cover 22 can slide relative to the calibration body 1, and the operation is simple and quick.

[0048] More preferably, if Figure 5 As shown, the protection component 4 includes a protection shell 41 and a protection plate 42. The protection shell 41 has a through slot 411. The front end of the protection shell 41 has a first opening 412, and the rear end of the protection shell 41 has a second opening 413. The first opening 412 and the second opening 413 are both connected to the through slot 411. The protection plate 42 is hinged to the rear end face of the protection shell 41 to cover the second opening 413. The front end of the protection shell 41 is fixedly connected to the rear end face of the calibration body 1. The first opening 412 is opposite to the line connection end 12. A gasket 43 is provided on the end face of the protection plate 42 close to the through slot 411. The protection plate 42 only needs to be flipped open relative to the protection shell 41 to expose the line connection end 12, so that the calibration component can be connected to the external device.

[0049] More preferably, if Figure 7As shown, the protection assembly 4 also includes a locking portion 44, the locking portion 44 includes a first locking block 441, a second locking block 442, a locking spring 443 and a clamping block 444, the first locking block 441 is arranged on the side wall of the protection shell 41, the first locking block 441 has a first cavity 4411, and a first opening 4412 and a second opening 4413 are respectively opened on the rear end surface of the first locking block 441 and the side wall away from the protection shell 41, the first opening 4412 and the second opening 4413 are both connected to the first cavity 4411, the second locking block 442 includes a connecting block 4421 and an inserting block 4422 connected to each other, and the connecting block 4421 is placed on the protection shell 41. On the side wall of the plate 42, the plug block 4422 has a second cavity 44221, and a third opening 44222 is opened on the side wall of the plug block 4422 away from the protective plate 42, and the third opening 44222 is communicated with the second cavity 44221, one end of the locking spring 443 is connected to the inner wall of the second cavity 44221 close to the protective plate 42, and the other end of the locking spring 443 is connected to the clamping block 444, and the clamping block 444 protrudes from the third opening 44222. When the protective plate 42 covers the second opening 413, the plug block 4422 is inserted into the first cavity 4411, and the clamping block 444 passes through the first cavity 4411 and out of the second opening 4413.

[0050] Specifically, the user overcomes the elastic force of the locking spring 443 and presses the second card block 444 to accommodate it in the second cavity 44221, and rotates the protective plate 42 until the protective plate 42 completely covers the second opening 413. At this time, the second locking block 442 is inserted into the first wall from the first opening 4412, and the third opening 44222 is opposite to the second opening 4413. The elastic force of the locking spring 443 drives the card block 444 to move away from the second cavity 44221, and the card block 444 passes through The third opening 44222 protrudes from the second opening 4413, and the limit between the block 444 and the second opening 4413 limits the rotation of the protective plate 42 relative to the protective shell 41, thereby completing the covering; similarly, the elastic force of the customer locking spring 443 presses the block 444 to accommodate it back into the second cavity 44221, and the limit between the block 444 and the second opening 4413 becomes invalid, so that the protective plate 42 can rotate relative to the protective shell 41 to open the line connection end 12.

[0051] More preferably, when the protective plate 42 covers the second opening 413, the clamping block 444 is a wedge-shaped block with a thickness gradually increasing from front to back. When the protective plate 42 covers the second opening 413, the end of the wedge-shaped block with the smallest thickness first contacts the edge of the first opening 4412. When the inserting block 4422 is inserted into the first cavity 4411, the inclined surface of the wedge-shaped block contacts the edge of the first opening 4412. The first opening 4412 applies pressure to the inclined surface of the wedge-shaped block, overcomes the elastic force of the locking spring 443, and pushes the wedge-shaped block to be gradually accommodated in the second cavity 44221. When the first opening 4412 is separated from the inclined surface of the wedge-shaped block, the pressure applied to the inclined surface of the wedge-shaped block disappears, and the locking spring 443 drives the wedge-shaped block to bounce into the second opening 4413, and the second opening 4413 cooperates with the clamping block 444 to lock.

[0052] Preferably, if Figure 8 As shown, the electric energy meter calibration body 1 also includes a shock absorbing assembly 5, which includes a shock absorbing plate 51, an anti-collision panel 52 is provided on the outer edge of the shock absorbing plate 51, a damper 53 is provided on the upper end surface of the shock absorbing plate 51, the outer shell of the damper 53 is connected to the upper end surface of the shock absorbing plate 51, the piston rod of the damper 53 extends upward and is connected to the bottom of the calibration body 1, and a shock absorbing spring 54 is provided on the outer periphery of the piston rod, and the two ends of the shock absorbing spring 54 are respectively connected to the outer shell of the damper 53 and the bottom of the calibration body 1. The anti-collision panel 52, the damper 53 and the shock absorbing spring 54 are provided, so that if the electric energy meter calibration device falls, it can be buffered to a certain extent, thereby reducing the damage caused to the calibration body 1.

[0053] In summary, an embodiment of the present invention provides an electric energy meter calibration device, wherein a cleaning component 2 is slidably arranged above a calibration body 1, and a cleaning portion 21 abuts against an upper mark of the calibration body 1. The cleaning portion 21 can clean the buttons and screen of the calibration body 1 when sliding with the cleaning component 2. When not in use, the cleaning component 2 covers the top of the calibration body 1 to prevent dust from directly contacting the buttons and the screen. When it is needed, the cleaning component 2 slides, and the cleaning portion 21 cleans the buttons and the screen to ensure a good user experience with cleanliness when the user uses the calibration body 1. The protective component 4 covers the line connection terminal 12 of the calibration body 1 to prevent dust from invading the line connection terminal 12, thereby ensuring the reliability of the data obtained by calibration.

[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An electric energy meter calibration device, It is characterized in that include: A testing body (1), wherein the front end of the testing body (1) has a temperature measuring portion (11), and the rear end of the testing body (1) has a line connection end (12); A cleaning component (2), the cleaning component (2) comprising a cleaning portion (21), the cleaning component (2) being slidably disposed above the testing body (1), the cleaning portion (21) being in contact with the upper surface of the testing body (1) and being used for cleaning buttons and a screen on the upper surface of the testing body (1); A locking assembly (3), the locking assembly (3) being arranged on the rear end surface of the cleaning assembly (2) and being used for locking the cleaning assembly (2) to prevent the cleaning assembly (2) from sliding; A protection component (4), wherein the locking component (3) is arranged on the protection component (4), and the protection component (4) is arranged on the rear side of the line connection end (12) and is used to cover the line connection end (12) to prevent the line connection end (12) from contacting the outside.

2. According to the electric energy meter calibration device of claim 1, It is characterized in that The cleaning component (2) further comprises an end cover (22), a clearance groove (221) is provided on the end cover (22), a slide bar (222) extending in the front-to-back direction is provided on the end cover (22), the slide bar (222) is located on both sides of the clearance groove (221) in the front-to-back direction, a slide groove (13) is provided on the inspection body (1) in the front-to-back direction, the slide groove (13) is slidably connected with the slide bar (222), the cleaning part (21) comprises a brush (211), the brush (211) is arranged on the rear side groove wall of the clearance groove (221), and the lower end of the brush (211) protrudes from the clearance groove (221).

3. According to the electric energy meter calibration device of claim 2, It is characterized in that The locking assembly (3) comprises a locking shell (31), a fixing strip (32) and a locking block (33); the locking shell (31) is fixedly arranged on the upper end surface of the protection assembly (4); the locking shell (31) has a receiving cavity (311); the front end surface of the locking shell (31) is provided with an opening (312); the locking shell (31) is provided with a locking groove (313); the locking groove (313) is located adjacent to the opening (312); On the side wall of the end cover (22), the accommodating cavity (311), the opening (312) and the locking groove (313) are connected to each other, the fixing strip (32) is fixed to the rear end surface of the end cover (22), the fixing strip (32) can be accommodated in the accommodating cavity (311) through the opening (312), the locking block (33) is movably arranged on the fixing strip (32), and the locking block (33) can be detachably snapped into the locking groove (313).

4. According to the electric energy meter calibration device of claim 3, It is characterized in that The locking assembly (3) further comprises an elastic connecting member (34); the locking groove (313) comprises a first groove body (3131) and a second groove body (3132); the first groove body (3131) extends in a front-to-rear direction; the second groove body (3132) extends in an up-to-down direction; the lower end of the second groove body (3132) is connected to the rear end of the first groove body (3131); the two ends of the elastic connecting member (34) are respectively connected to the fixing strip (32) and the locking block (33); the locking block (33) passes through the locking groove (313) from the accommodating cavity (311); and the locking block (33) is slidably disposed in the first groove body (3131) and the second groove body (3132).

5. The electric energy meter calibration device according to claim 1, It is characterized in that The protection component (4) comprises a protection shell (41) and a protection plate (42); the protection shell (41) has a through slot (411); the front end of the protection shell (41) has a first opening (412); the rear end of the protection shell (41) has a second opening (413); the first opening (412) and the second opening (413) are both connected to the through slot (411); the protection plate (42) is hinged to the rear end face of the protection shell (41) for covering the second opening (413); the front end of the protection shell (41) is fixedly connected to the rear end face of the calibration body (1); the first opening (412) is opposite to the line connection end (12); a gasket (43) is provided on the end face of the protection plate (42) close to the through slot (411).

6. The electric energy meter calibration device according to claim 5, It is characterized in that The protective assembly (4) also includes a locking portion (44), the locking portion (44) including a first locking block (441), a second locking block (442), a locking spring (443) and a clamping block (444), the first locking block (441) being arranged on the side wall of the protective shell (41), the first locking block (441) having a first cavity (4411), a first opening (4412) and a second opening (4413) being respectively provided on the rear end surface of the first locking block (441) and the side wall away from the protective shell (41), the first opening (4412) and the second opening (4413) being both connected to the first cavity (4411), the second locking block (442) including a connecting block (4421) and an inserting block (4422) connected to each other, the connecting block (4421) being placed on the side wall of the protective plate (42) On the side wall, the plug block (4422) has a second cavity (44221), and a third opening (44222) is opened on the side wall of the plug block (4422) away from the protective plate (42), and the third opening (44222) is connected to the second cavity (44221), one end of the locking spring (443) is connected to the inner wall of the second cavity (44221) close to the protective plate (42), and the other end of the locking spring (443) is connected to the clamping block (444), and the clamping block (444) protrudes from the third opening (44222). When the protective plate (42) covers the second opening (413), the plug block (4422) is inserted into the first cavity (4411), and the clamping block (444) passes through the first cavity (4411) and out of the second opening (4413).

7. The electric energy meter calibration device according to claim 6, It is characterized in that When the protective plate (42) covers the second opening (413), the blocking block (444) is a wedge-shaped block with a thickness gradually increasing from front to back.

8. The electric energy meter calibration device according to claim 1, It is characterized in that It also includes a shock absorbing assembly (5), the shock absorbing assembly (5) including a shock absorbing plate (51), an anti-collision panel (52) is provided on the outer edge of the shock absorbing plate (51), a damper (53) is provided on the upper end surface of the shock absorbing plate (51), the outer shell of the damper (53) is connected to the upper end surface of the shock absorbing plate (51), the piston rod of the damper (53) extends upward and is connected to the bottom of the calibration body (1), the outer periphery of the piston rod is provided with a shock absorbing spring (54), and the two ends of the shock absorbing spring (54) are respectively connected to the outer shell of the damper (53) and the bottom of the calibration body (1).

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