A device for calibrating electricity meters

Abstract

This invention relates to the field of electricity meter calibration technology and discloses an electricity meter calibration device, comprising: a calibration body, with a temperature measuring part at the front end and a line connection end at the rear end; a cleaning component, including a cleaning part slidably disposed above the calibration body, the cleaning part abutting against the upper surface of the calibration body, used to clean the buttons and screen on the upper surface of the calibration body; a locking component, disposed on the rear end face of the cleaning component, used to lock the cleaning component and prevent it from sliding; and a protective component, the locking component disposed on the protective component, the protective component being disposed behind the line connection end, used to cover the line connection end to prevent it from contacting the outside. The electricity meter calibration device provided by this invention can clean dust from the calibration body and prevent dust from entering the line connection end of the calibration body, ensuring cleanliness and thus ensuring the reliability of the calibration data.

Description

Technical Field

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

[0002] An electricity meter is a device used to detect electrical energy. It has the characteristics of high measurement accuracy and short conversion time. Repeated measurements can reduce various interference factors and reduce accidental interference and errors. However, electricity meters usually need to be calibrated by a calibration device during use.

[0003] Nowadays, calibration devices can make the calibration of electrical energy more accurate. However, after long-term use, the calibration devices are prone to dust accumulation, which not only covers the buttons and screen, but also invades the wiring connection terminals, which can easily affect the accuracy of the electricity meter calibration and make the data obtained unreliable. Summary of the Invention

[0004] The purpose of this invention is to provide an electricity meter calibration device that can clean the dust on the calibration body and prevent dust from entering the circuit connection terminals of the calibration body, thus ensuring cleanliness and the reliability of the calibration data.

[0005] To achieve the above objectives, the present invention provides an energy meter calibration device, comprising:

[0006] The testing body has a temperature measuring unit at its front end and a line connection terminal at its rear end;

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

[0008] A locking component is disposed on the rear end face of the cleaning component for locking the cleaning component and preventing the cleaning component from sliding.

[0009] A protective component, wherein the locking component is disposed on the protective component, and the protective component is disposed on the rear side of the line connection end, for covering the line connection end to prevent the line connection end from contacting the outside.

[0010] Furthermore, the cleaning assembly also includes an end cap, on which a clearance groove is formed, and on which a slide bar extends in the front-rear direction. The slide bar is located on both sides of the clearance groove in the front-rear direction. The inspection body has a sliding groove in the front-rear direction, which is slidably connected to the slide bar. The cleaning part includes a brush, which is disposed on the rear 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 housing, a fixing strip, and a locking block. The locking housing is fixedly disposed on the upper end face of the protective assembly. The locking housing has a receiving cavity, and the front end face of the locking housing has an opening. The locking housing has a locking groove located on a side wall adjacent to the opening. The receiving cavity, the opening, and the locking groove are interconnected. The fixing strip is fixed to the rear end face of the end cap. The fixing strip can be received in the receiving cavity through the opening. The locking block is movably disposed on the fixing strip and can be detachably snapped into the locking groove.

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

[0013] Furthermore, the protective assembly includes a protective housing and a protective plate. The protective housing has a through groove, a first through-hole at the front end, and a second through-hole at the rear end. Both the first through-hole and the second through-hole are connected to the through groove. The protective plate is hinged to the rear end face of the protective housing to cover the second through-hole. The front end of the protective housing is fixedly connected to the rear end face of the inspection body. The first through-hole faces the line connection end. A gasket is provided on the end face of the protective plate near the through groove.

[0014] Furthermore, the protective assembly also includes a locking part, which includes a first locking block, a second locking block, a locking spring, and a locking block. The first locking block is disposed on the side wall of the protective housing and has a first cavity. A first opening and a second opening are respectively provided on the rear end face and the side wall away from the protective housing of the first locking block. 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 that are 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 provided on the side wall 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 near the protective plate, and the other end of the locking spring is connected to the locking block. The locking block protrudes from the third opening. When the protective plate covers the second opening, the insert block is inserted into the first cavity, and the locking block passes through the first cavity and out of the second opening.

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

[0016] Furthermore, the energy meter calibration body also includes a shock absorption assembly, which includes a shock absorption plate. The shock absorption plate has an anti-collision enclosure on its outer edge. A damper is provided on the upper surface of the shock absorption plate. The outer shell of the damper is connected to the upper surface of the shock absorption plate. The piston rod of the damper extends upward and is connected to the bottom of the calibration body. A shock absorption spring is sleeved on the outer periphery of the piston rod. The two ends of the shock absorption 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 present invention provides an energy meter calibration body with the following advantages: a cleaning component is slidably disposed above the calibration body, and a cleaning part abuts against the top label of the calibration body. When the cleaning part slides with the cleaning component, it can clean the buttons and screen of the calibration body. In the non-use state, the cleaning component covers the top of the calibration body, which can prevent dust from directly contacting the buttons and screen. When it is needed, the cleaning component slides, and the cleaning part cleans the buttons and screen, ensuring that the user can have a good user experience with cleanliness when using the calibration body; a protective component covers the wiring connection end of the calibration body to prevent dust from entering the wiring connection end and ensure the reliability of the data obtained from the calibration. Attached Figure Description

[0018] Figure 1 This is an overall structural diagram of the electricity meter calibration device according to an embodiment of the present invention;

[0019] Figure 2 This is an exploded view of the electricity meter calibration device according to an embodiment of the present invention;

[0020] Figure 3 This is an exploded view of the cleaning component of the electricity meter calibration device according to an embodiment of the present invention;

[0021] Figure 4 This is an exploded view of the fixing bar, elastic connector, and locking block of the energy meter calibration device according to an embodiment of the present invention;

[0022] Figure 5 This is an exploded view of the locking housing and protective components of the energy meter calibration device according to an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the locking housing, protective housing, and protective plate of the electricity meter calibration device according to an embodiment of the present invention;

[0024] Figure 7 This is an exploded view of the locking part of the electricity meter calibration device according to an embodiment of the present invention;

[0025] Figure 8 This is an exploded view of the shockproof component of the electricity meter calibration device according to an embodiment of the present invention.

[0026] In the diagram, 1. Inspection body; 11. Temperature measuring unit; 12. Line connection terminal; 13. Slide groove;

[0027] 2. Cleaning components; 21. Cleaning section; 211. Brush; 22. End cap; 221. Relief groove; 222. Sliding strip;

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

[0029] 4. Protective components; 41. Protective housing; 411. Through groove; 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. Insert block; 44221. Second cavity; 44222. Third opening; 443. Locking spring; 444. Locking block;

[0030] 5. Vibration damping components; 51. Vibration damping plate; 52. Anti-collision barrier; 53. Damper; 54. Vibration damping spring. Detailed Implementation

[0031] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0032] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0033] In the description of this invention, the terms "upper," "lower," "left," "right," "front," "rear," "inner," "outer," "lateral," and "longitudinal," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation, and therefore should not be construed as limiting this utility model. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances.

[0034] In the description of this invention, the terms "provided with," "set up," "connected," and "placed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0036] The technical solution of the present invention will be further described below with reference to the embodiments and accompanying drawings.

[0037] like Figure 1 , 2 As shown, an embodiment of the present invention provides an energy meter calibration device, comprising:

[0038] The verification body 1 has a temperature measuring unit 11 at its front end and a line connection terminal 12 at its rear end.

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

[0040] Locking component 3 is disposed on the rear end face of cleaning component 2 and is used to lock cleaning component 2 to prevent cleaning component 2 from sliding.

[0041] The protective component 4 and the locking component 3 are disposed on the protective component 4. The protective component 4 is disposed on the rear side of the line connection terminal 12 to cover the line connection terminal 12 and prevent the line connection terminal 12 from contacting the outside.

[0042] Based on the above technical solution, the cleaning component 2 is slidably disposed above the calibration body 1, and the cleaning part 21 abuts against the top of the calibration body 1. When the cleaning part 2 slides with the cleaning component 2, it can clean the buttons and screen of the calibration body 1. In the non-use state, the cleaning component 2 covers the top of the calibration body 1, which can 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, ensuring 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 entering the line connection terminal 12 and ensure the reliability of the data obtained from the calibration.

[0043] Preferably, such as Figure 2 , 3 As shown, the cleaning component 2 also includes an end cap 22, on which a clearance groove 221 is formed. A slide bar 222 extending in the front-to-back direction is also provided on the end cap 22, located on both sides of the clearance groove 221 in the front-to-back direction. A sliding groove 13 is formed on the inspection body 1 in the front-to-back direction, and the sliding groove 13 slidably connects with the slide bar 222. The cleaning part 21 includes a brush 211, which is disposed on the rear wall of the clearance groove 221, with its lower end protruding from the clearance groove 221. When the end cap 22 slides on the inspection body 1, the lower end of the brush 211 sweeps across the buttons and screen of the inspection body 1, effectively cleaning dust from the buttons and screen, ensuring cleanliness and improving the user's operating experience.

[0044] More preferably, such as Figure 4 , 5 As shown in Figure 6, the locking assembly 3 includes a locking housing 31, a fixing strip 32, and a locking block 33. The locking housing 31 is fixedly disposed on the upper end face of the protective assembly 4. The locking housing 31 has a receiving cavity 311. The front end face of the locking housing 31 is provided with an opening 312. A locking groove 313 is provided on the locking housing 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 interconnected. The fixing strip 32 is fixed on the rear end face of the end cover 22. The fixing strip 32 can be received in the receiving cavity 311 through the opening 312. The locking block 33 is movably disposed on the fixing strip 32. The locking block 33 can be detachably snapped into the locking groove 313. When the locking block 33 is engaged in the locking groove 313, the end cover 22 cannot slide relative to the locking housing 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, making it convenient and quick to use.

[0045] More preferably, such as Figure 6As shown, the locking assembly 3 also includes an elastic connector 34. The locking groove 313 includes a first groove 3131 and a second groove 3132. The first groove 3131 extends in the front-to-back direction, and the second groove 3132 extends in the up-down direction. The lower end of the second groove 3132 is connected to the rear end of the first groove 3131. The two ends of the elastic connector 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 receiving cavity 311 and is slidably disposed in the first groove 3131 and the second groove 3132.

[0046] Specifically, the elastic connector 34 includes a first connecting cylinder, a locking spring, and a second connecting cylinder connected in sequence from top to bottom.

[0047] Specifically, the elastic connector 34 is always stretched within the locking groove 313. The user manually slides the locking block 33 protruding from the locking groove 313 from the first groove 3131 to the second groove 3132 away from the first groove 3131. At this time, the force on the locking block 33 is the elastic force of the elastic connector 34 towards the fixed plate, which locks the sliding of the end cover 22. The user manually slides the locking block 33 protruding from the locking groove 313 from the second groove 3132 away from the first groove 3131 to the first groove 3131 away from the second groove 3132. Since the first groove 3131 does not restrict the locking block 33 in the front-back direction, the locking block 33 does not lock the end cover 22. At this time, the end cover 22 can slide relative to the locking housing 31, that is, the end cover 22 can slide relative to the inspection body 1. The operation is simple and quick.

[0048] More preferably, such as Figure 5 As shown, the protective assembly 4 includes a protective housing 41 and a protective plate 42. The protective housing 41 has a through groove 411, a first through-hole 412 at its front end, and a second through-hole 413 at its rear end. Both the first through-hole 412 and the second through-hole 413 are connected to the through groove 411. The protective plate 42 is hinged to the rear end face of the protective housing 41 to cover the second through-hole 413. The front end of the protective housing 41 is fixedly connected to the rear end face of the calibration body 1. The first through-hole 412 faces the wiring connection end 12. A gasket 43 is provided on the end face of the protective plate 42 near the through groove 411. The wiring connection end 12 can be exposed by simply flipping the protective plate 42 relative to the protective housing 41 to connect the calibration assembly to external equipment.

[0049] More preferably, such as Figure 7As shown, the protective assembly 4 also includes a locking part 44, which includes a first locking block 441, a second locking block 442, a locking spring 443, and a latching block 444. The first locking block 441 is disposed on the side wall of the protective housing 41 and has a first cavity 4411. A first opening 4412 and a second opening 4413 are respectively opened on the rear end face of the first locking block 441 and the side wall away from the protective housing 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 a plug 4422 that are connected to each other. The connecting block 4421 is placed on the protective housing 41. On the side wall of plate 42, the insert 4422 has a second cavity 44221. The insert 4422 has a third opening 44222 on the side wall away from the protective plate 42. 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 near the protective plate 42. The other end of the locking spring 443 is connected to the locking block 444. The locking block 444 protrudes from the third opening 44222. When the protective plate 42 covers the second opening 413, the insert 4422 is inserted into the first cavity 4411, and the locking 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 to press the second locking block 444, causing it to be accommodated in the second cavity 44221. The user then rotates the protective plate 42 until it completely covers the second opening 413. At this point, 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 locking block 444 to move away from the second cavity 44221, and the locking block 444 passes through... The third opening 44222 protrudes from the second opening 4413. The limiting position between the locking block 444 and the second opening 4413 restricts the rotation of the protective plate 42 relative to the protective housing 41, thus completing the closing. Similarly, the elastic force of the customer locking spring 443 presses the locking block 444, causing it to be retracted into the second cavity 44221. The limiting position between the locking block 444 and the second opening 4413 is invalidated, and the protective plate 42 can rotate relative to the protective housing 41 to open the line connection terminal 12.

[0051] More preferably, when the protective plate 42 covers the second opening 413, the locking block 444 is a wedge-shaped block with a gradually increasing thickness from front to back. When the protective plate 42 is closed onto the second opening 413, the end of the wedge with the smallest thickness first contacts the edge of the first opening 4412. During the process of inserting the insert block 4422 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, overcoming the elastic force of the locking spring 443, and pushing the wedge-shaped block to gradually be accommodated in the second cavity 44221. When the first opening 4412 disengages 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 spring into the second opening 4413. The second opening 4413 and the locking block 444 cooperate to lock.

[0052] Preferably, such as Figure 8 As shown, the electricity meter testing body 1 also includes a shock-absorbing assembly 5, which includes a shock-absorbing plate 51. A crash barrier 52 is provided on the outer edge of the shock-absorbing plate 51. A damper 53 is provided on the upper surface of the shock-absorbing plate 51. The outer shell of the damper 53 is connected to the upper surface of the shock-absorbing plate 51. The piston rod of the damper 53 extends upward and is connected to the bottom of the testing body 1. A shock-absorbing spring 54 is sleeved around the outer periphery of the piston rod. 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 testing body 1. By providing the crash barrier 52, damper 53, and shock-absorbing spring 54, if the electricity meter testing device is dropped, it can be cushioned to a certain extent, reducing damage to the testing body 1.

[0053] In summary, this embodiment of the invention provides an electricity meter calibration device, in which the cleaning component 2 is slidably disposed above the calibration body 1, and the cleaning part 21 abuts against the top of the calibration body 1. When the cleaning part 2 slides with the cleaning component 2, it can clean the buttons and screen of the calibration body 1. In the non-use state, the cleaning component 2 covers the top of the calibration body 1, which can 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, ensuring 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 entering the line connection terminal 12 and to ensure the reliability of the data obtained from the calibration.

[0054] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A device for calibrating an electricity meter, characterized in that, include: The testing body (1) has a temperature measuring part (11) at its front end and a line connection end (12) at its rear end. Cleaning component (2), the cleaning component (2) includes a cleaning part (21), the cleaning component (2) is slidably disposed above the testing body (1), the cleaning part (21) abuts against the upper surface of the testing body (1) and is used to clean the buttons and screen on the upper surface of the testing body (1); Locking component (3), the locking component (3) is disposed on the rear end face of the cleaning component (2) for locking the cleaning component (2) and preventing the cleaning component (2) from sliding; The protective component (4) is provided on the locking component (3), and the protective component (4) is provided on the rear side of the line connection end (12) to cover the line connection end (12) to prevent the line connection end (12) from contacting the outside. The protective component (4) includes a protective housing (41) and a protective plate (42). The protective housing (41) has a through groove (411). The front end of the protective housing (41) has a first through opening (412), and the rear end of the protective housing (41) has a second through opening (413). The first through opening (412) and the second through opening (413) are both connected to the through groove (411). The protective plate (42) is hinged to the rear end face of the protective housing (41) to cover the second through opening (413). The front end of the protective housing (41) is fixedly connected to the rear end face of the inspection body (1). The first through opening (412) is directly opposite the line connection end (12). A gasket (43) is provided on the end face of the protective plate (42) near the through groove (411). The protective assembly (4) further includes a locking part (44), which includes a first locking block (441), a second locking block (442), a locking spring (443), and a locking block (444). The first locking block (441) is disposed on the side wall of the protective housing (41). The first locking block (441) has a first cavity (4411). A first opening (4412) and a second opening (4413) are respectively opened on the rear end face of the first locking block (441) and the side wall away from the protective housing (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 a plug (4422) that are connected to each other. The connecting block (4421) is placed on the protective plate (42). On the side wall, the insert (4422) has a second cavity (44221). The insert (4422) has a third opening (44222) on the side wall away from the protective plate (42). 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) near the protective plate (42). The other end of the locking spring (443) is connected to the locking block (444). The locking block (444) protrudes from the third opening (44222). When the protective plate (42) covers the second opening (413), the insert (4422) is inserted into the first cavity (4411), and the locking block (444) passes through the first cavity (4411) and out of the second opening (4413).

2. The electricity meter calibration device according to claim 1, characterized in that, The cleaning component (2) also includes an end cap (22), on which a clearance groove (221) is provided. The end cap (22) is provided with a slide bar (222) extending in the front-back direction. The slide bar (222) is located on both sides of the clearance groove (221) in the front-back direction. The inspection body (1) is provided with a slide groove (13) in the front-back direction. The slide groove (13) is slidably connected with the slide bar (222). The cleaning part (21) includes a brush (211), which is disposed on the rear side wall of the clearance groove (221). The lower end of the brush (211) protrudes from the clearance groove (221).

3. The electricity meter calibration device according to claim 2, characterized in that, The locking assembly (3) includes a locking housing (31), a fixing strip (32), and a locking block (33). The locking housing (31) is fixedly disposed on the upper end face of the protective assembly (4). The locking housing (31) has a receiving cavity (311). The front end face of the locking housing (31) is provided with an opening (312). The locking housing (31) is provided with a locking groove (313), which is located adjacent to the opening (312). On the side wall, the accommodating cavity (311), the opening (312) and the locking groove (313) are interconnected. The fixing strip (32) is fixed to the rear end face of the end cap (22). The fixing strip (32) can be accommodated in the accommodating cavity (311) through the opening (312). The locking block (33) is movably disposed on the fixing strip (32). The locking block (33) can be detachably snapped into the locking groove (313).

4. The electricity meter calibration device according to claim 3, characterized in that, The locking assembly (3) further includes an elastic connector (34). The locking groove (313) includes a first groove (3131) and a second groove (3132). The first groove (3131) extends in the front-to-back direction, and the second groove (3132) extends in the up-down direction. The lower end of the second groove (3132) is connected to the rear end of the first groove (3131). The two ends of the elastic connector (34) are respectively connected to the fixing strip (32) and the locking block (33). The locking block (33) extends out of the locking groove (313) from the receiving cavity (311). The locking block (33) is slidably disposed in the first groove (3131) and the second groove (3132).

5. The electricity meter calibration device according to claim 1, characterized in that, When the protective plate (42) covers the second opening (413), the locking block (444) is a wedge-shaped block with gradually increasing thickness from front to back.

6. The electricity meter calibration device according to claim 1, characterized in that, It also includes a shock-absorbing assembly (5), which includes a shock-absorbing plate (51). A crash barrier (52) is provided on the outer edge of the shock-absorbing plate (51). A damper (53) is provided on the upper surface of the shock-absorbing plate (51). The outer shell of the damper (53) is connected to the upper surface of the shock-absorbing plate (51). The piston rod of the damper (53) extends upward and is connected to the bottom of the inspection body (1). A shock-absorbing spring (54) is sleeved on the outer periphery of the piston rod. 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 inspection body (1).

Images