Multifunctional intelligent electric meter verification device

Abstract

The invention discloses a multifunctional intelligent electric meter verification device, and relates to the technical field of intelligent electric meter verification, the multifunctional intelligent electric meter verification device comprises a protection box, the front surface of the protection box is provided with a box door, the front surface of the box door is provided with a handle, the upper surface of the protection box is provided with a lifting handle, the protection box is internally provided with an electric meter verification instrument, and the exterior of the electric meter verification instrument is provided with a clamping assembly. Through cooperative arrangement of the protection box, the box door, the handle, the lifting handle, the electric meter calibrator, the clamping assembly, the calibration wire, the silica gel sleeve, the calibration connector and the damping assembly, the calibration connector is pulled downwards to pull out the calibration wire, and the calibration connector is used for being connected with a calibrated intelligent electric meter. According to the electric meter checking device, the electric meter checking instrument can be conveniently used for checking the intelligent electric meter, the electric meter checking instrument can be conveniently mounted and dismounted through the arranged clamping assembly, when the electric meter checking instrument is damaged, the electric meter checking instrument can be conveniently maintained and replaced, and the use effect of the electric meter checking device can be guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of smart meter calibration, and in particular to a multifunctional smart meter calibration device. Background Art

[0002] Smart meter is one of the basic equipment for data collection in smart grid and also the core equipment for power distribution and utilization management. Smart meter is an intelligent instrument based on microprocessor application and network communication technology. In addition to the basic power consumption metering function of traditional energy meter, in order to adapt to the use of smart grid and new energy, it also has two-way multi-rate metering function, user-side control function, two-way data communication function with multiple data transmission modes, anti-electricity theft function and other intelligent functions. Smart meter can provide users with detailed power consumption information, help users better manage power consumption, and achieve the goal of saving electricity bills and reducing greenhouse gas emissions. As the intelligent terminal of smart grid and the core equipment for power distribution and utilization management, smart meter has broad application prospects and important value significance. During the use of smart meter, it is easy to have inaccurate measurement when it is interfered by the outside world, and the meter needs to be debugged and calibrated.

[0003] According to the patent application number 202323256117.X, a smart meter debugging and verification device is disclosed, including a protective box and a wire, an electric meter calibrator is fixedly installed inside the protective box, a box door is hinged on the front of the protective box, a winding assembly is provided on the protective box, and a limiting assembly is provided on the protective box, the limiting assembly includes a fixing seat fixedly connected to the inner wall of the back side of the protective box, and a limiting plate for limiting the wire is rotatably connected inside the fixing seat.

[0004] By adopting the above scheme, one end of the wire is restricted by a limiting plate, which reduces the possibility that the staff accidentally touches and pulls the wire, resulting in a loose connection between the wire and the protective box, thereby ensuring the debugging and verification effect of the smart meter. However, the above scheme still has certain defects when used. When in use, the above scheme fixes the meter calibrator inside the protective box, which is inconvenient to install and disassemble the meter calibrator. When the meter calibrator is damaged, it is inconvenient to repair and replace it, which affects the use effect of the meter calibration device. To this end, we provide a multifunctional smart meter calibration device to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to remedy the deficiencies of the prior art and provide a multifunctional smart meter calibration device.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a multifunctional intelligent meter calibration device, comprising a protective box, a box door is installed on the front of the protective box, a handle is installed on the front of the box door, a handle is installed on the upper surface of the protective box, an electric meter calibrator is arranged inside the protective box, a clamping assembly is arranged outside the electric meter calibrator, the inner wall of the protective box is rotatably connected with a winding shaft, a calibration wire is wound on the outer surface of the winding shaft, the top of the calibration wire is connected to the electric meter calibrator, the left end of the winding shaft is fixedly connected with a turntable, the inner bottom wall of the protective box is fixedly inlaid with a silicone sleeve, the bottom end of the calibration wire passes through the silicone sleeve and extends to the outside of the protective box, the bottom end of the calibration wire is installed with a calibration connector, a damping assembly is arranged outside the winding shaft, a group of heat dissipation grooves are opened on the left and right sides of the protective box, and a filter is installed on the inner wall of each heat dissipation groove.

[0007] Furthermore, the clamping assembly includes two L-shaped clamping plates located inside the protective box, and a group of rubber strips are installed on the inner walls of the two L-shaped clamping plates, and the rubber strips are in contact with the electric meter calibrator.

[0008] Furthermore, the clamping assembly also includes a guide groove 1 opened on the inner wall of the protection box, and the inner wall of the guide groove 1 is slidably connected to two guide blocks 1, and the two guide blocks 1 are respectively connected to two L-shaped clamping plates.

[0009] Furthermore, the clamping assembly also includes a limit frame fixedly embedded in the back of the protective box, and the inner wall of the limit frame is slidably connected to two moving blocks, and the moving blocks are connected to the L-shaped clamping plate.

[0010] Furthermore, the inner wall of the limit frame is rotatably connected with a forward and reverse screw rod, the two moving blocks are both threadedly connected with the forward and reverse screw rod, and a rotating block is installed at the right end of the forward and reverse screw rod.

[0011] Furthermore, a second guide groove is provided on the inner wall of the limit frame, and two second guide blocks are slidably connected to the inner wall of the second guide groove, and the second guide block is connected to the moving block.

[0012] Furthermore, a limit gear is installed on the outer surface of the forward and reverse screw rods, a guide frame is fixedly embedded on the upper surface of the limit frame, and a guide plate is slidably connected to the inner wall of the guide frame.

[0013] Furthermore, a connecting plate is installed on the bottom surface of the guide plate, a limiting plate is installed on the bottom end of the connecting plate, and the limiting plate is matched with the limiting gear.

[0014] Furthermore, two springs are installed between the guide plate and the inner top wall of the guide frame, a pull rod is installed on the upper surface of the guide plate, and a pull ring is installed on the top end of the pull rod.

[0015] Furthermore, the damping assembly includes a circle of damping patterns opened on the outer surface of the reeling shaft and a sliding frame installed on the inner bottom wall of the protective box, the inner wall of the sliding frame is slidably connected with a slide plate, a spring 2 is installed between the bottom surface of the slide plate and the inner bottom wall of the slide frame, a damping block is installed on the top of the slide plate, and the damping block is adapted to the damping pattern.

[0016] Compared with the prior art, the multifunctional smart meter calibration device has the following beneficial effects: 1. The present invention cooperates with the protective box, the box door, the handle, the carrying handle, the meter calibrator, the clamping assembly, the calibration wire, the silicone sleeve, the calibration joint and the damping assembly. The calibration joint is pulled downward to pull out the calibration wire, and the calibration joint is used to connect with the smart meter to be calibrated. The smart meter can be conveniently calibrated using the meter calibrator. The clamping assembly can be used to facilitate the installation and disassembly of the meter calibrator. When the meter calibrator is damaged, it is convenient to repair and replace it, which can ensure the use effect of the meter calibration device.

[0017] 2. The present invention cooperates with the electric meter calibrator, L-shaped clamping plate, rubber strip, guide groove one, guide block one, limit frame, moving block, forward and reverse screw rods, rotating block, guide groove two, guide block two, limit gear, guide frame, guide plate, connecting plate, limit plate, spring one, pull rod and pull ring. Pulling the pull ring upwards makes the limit plate move away from the limit gear, thereby releasing the limit on the limit gear. Rotating the rotating block can drive the forward and reverse screw rods to rotate. Rotation of the forward and reverse screw rods can make the two moving blocks drive the two L-shaped clamping plates to move away from each other, thereby releasing the limit on the electric meter calibrator, thereby conveniently disassembling the electric meter calibrator and placing the repaired electric meter calibrator between the two L-shaped clamping plates. Reverse rotation of the rotating block can drive the forward and reverse screw rods to rotate in the reverse direction, thereby conveniently clamping and carrying the electric meter calibrator and conveniently reinstalling the electric meter calibrator.

[0018] 3. The present invention coordinates the winding shaft, the calibration wire, the turntable, the damping pattern, the sliding frame, the sliding plate, the spring 2 and the damping block. The spring 2 can provide elastic force to the sliding plate, so that the sliding plate and the damping block are subjected to upward elastic force, and the damping block can be in close contact with the damping pattern. When the winding shaft rotates inside the protective box, the damping force between the damping block and the damping pattern can avoid unnecessary rotation of the winding shaft, and can conveniently damp the rotation of the winding shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the protection box of the present invention; Figure 3It is a schematic diagram of the internal structure of the sliding frame of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the clamping assembly of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the limiting frame of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the guide frame of the present invention; Figure 7 It is a schematic diagram of the internal structure of the guide frame of the present invention.

[0020] In the figure: 1, protective box; 2, box door; 3, handle; 4, handle; 5, electric meter calibrator; 6, clamping assembly; 601, L-shaped clamping plate; 602, rubber strip; 603, guide groove 1; 604, guide block 1; 605, limit frame; 606, moving block; 607, forward and reverse screw rods; 608, rotating block; 609, guide groove 2; 610, guide block 2; 611, limit gear; 612, guide Frame; 613, guide plate; 614, connecting plate; 615, limit plate; 616, spring one; 617, pull rod; 618, pull ring; 7, reel-up shaft; 8, calibration wire; 9, turntable; 10, silicone sleeve; 11, calibration connector; 12, damping assembly; 121, damping pattern; 122, slide frame; 123, slide plate; 124, spring two; 125, damping block; 13, heat sink; 14, filter. DETAILED DESCRIPTION

[0021] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. Embodiment 1

[0023] like Figure 1 , Figure 2 and Figure 4As shown, a multifunctional intelligent meter calibration device includes a protective box 1, a box door 2 is installed on the front of the protective box 1, a handle 3 is installed on the front of the box door 2, a handle 4 is installed on the upper surface of the protective box 1, an electric meter calibrator 5 is arranged inside the protective box 1, and a clamping assembly 6 is arranged outside the electric meter calibrator 5. The inner wall of the protective box 1 is rotatably connected with a reel-up shaft 7, and a calibration wire 8 is wound on the outer surface of the reel-up shaft 7. The top of the calibration wire 8 is connected to the electric meter calibrator 5, and the left end of the reel-up shaft 7 is fixedly connected with a turntable 9. The inner bottom wall of the protective box 1 is fixedly inlaid with a silicone sleeve 10, and the bottom end of the calibration wire 8 passes through the silicone sleeve 10 and extends to the outside of the protective box 1. A calibration connector 11 is installed at the bottom end of the calibration wire 8, and a damping assembly 12 is arranged outside the reel-up shaft 7. A group of heat dissipation grooves 13 are opened on the left and right sides of the protective box 1, and a filter screen 14 is installed on the inner wall of each heat dissipation groove 13.

[0024] In this embodiment, the protective box 1 and the box door 2 are hinged by two hinges, and a common locking structure on the market is provided between the protective box 1 and the box door 2, which can conveniently lock the box door 2, and the provided handle 3 can be used to conveniently open the box door 2, and conveniently operate the interior of the protective box 1, and the provided handle 4 can be used to conveniently carry the device, which can increase the convenience of the device. Bearings are fixedly embedded on the left and right side walls of the protective box 1, and the two ends of the reeling shaft 7 are respectively connected to the inner rings of the two bearings, which can ensure the rotation accuracy of the reeling shaft 7, and the provided turntable 9 can conveniently rotate the reeling shaft 7 and can conveniently reel in the calibration wire 8. A through hole is opened in the inner bottom wall of the protection box 1, which can facilitate the installation of the silicone sleeve 10. The silicone sleeve 10 can be used to protect the calibration wire 8 and prevent the calibration wire 8 from being worn. The heat dissipation groove 13 can be used to conveniently dissipate heat for the electric meter calibrator 5 inside the protection box 1. The filter 14 can block dust in the air and prevent dust in the air from entering the interior of the protection box 1 through the heat dissipation groove 13 to damage the electric meter calibrator 5.

[0025] The working steps of this embodiment are as follows: like Figure 1 , Figure 2 and Figure 4As shown, when the device is used to calibrate the smart meter, the staff can conveniently carry the device by holding the handle 4. When calibrating the smart meter, first pull the calibration connector 11 downward, so that the reel 7 can rotate on the inner wall of the protective box 1, and the bottom end of the calibration wire 8 can be moved downward, so that the calibration wire 8 can be pulled out, and the calibration connector 11 is used to connect with the calibrated smart meter, so that the meter calibrator 5 can be used to calibrate the smart meter, and the use of the device can be convenient. When the calibration of the smart meter is completed, rotating the turntable 9 can drive the reel 7 to rotate, so that the reel 7 can reel in the calibration wire 8. Embodiment 2

[0026] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the clamping assembly 6 includes two symmetrical L-shaped clamping plates 601 located inside the protective box 1, and the inner walls of the two L-shaped clamping plates 601 are each installed with a group of rubber strips 602 arranged at equal distances, and the rubber strips 602 are in contact with the meter calibrator 5. The clamping assembly 6 also includes a guide groove 603 opened on the inner wall of the protective box 1, and the inner wall of the guide groove 603 is slidably connected with two symmetrical guide blocks 604, and the two guide blocks 604 are respectively connected to the two L-shaped clamping plates 601. The clamping assembly 6 also includes a The limit frame 605 has two symmetrical moving blocks 606 slidably connected to its inner wall, and the moving blocks 606 are connected to the L-shaped clamping plate 601. The inner wall of the limit frame 605 is rotatably connected to a forward and reverse screw rod 607. Both moving blocks 606 are threadedly connected to the forward and reverse screw rod 607. A rotating block 608 is installed on the right end of the forward and reverse screw rod 607. A guide groove 2 609 is provided on the inner wall of the limit frame 605. The inner wall of the guide groove 2 609 has two symmetrical guide blocks 2 610 slidably connected to it, and the guide blocks 2 610 are connected to the moving block 606.

[0027] In this embodiment, the L-shaped clamping plate 601 is provided to match the corners of the electric meter calibrator 5, so that the electric meter calibrator 5 can be conveniently carried. The rubber strip 602 is provided to increase the friction of the inner wall of the L-shaped clamping plate 601, and the electric meter calibrator 5 can be protected at the same time. When the L-shaped clamping plate 601 moves inside the protection box 1, the guide block 604 can slide on the inner wall of the guide groove 603, so that the L-shaped clamping plate 601 can be guided and limited, and the stability of the L-shaped clamping plate 601 when moving can be ensured. A square groove matched with the limit frame 605 is provided on the inner wall of the protection box 1, so that the limit frame 605 can be installed on the inner wall of the square groove, and the outer surfaces of the two moving blocks 606 are provided with positive and negative screw rods 60 7, the threaded holes adapted to each other can make the outer surface of the forward and reverse screw rods 607 be threadedly connected with the inner wall of the threaded holes, two bearings are fixedly embedded on the inner wall of the limit frame 605, the two ends of the forward and reverse screw rods 607 can be connected with the inner rings of the two bearings respectively, and the rotation accuracy of the forward and reverse screw rods 607 can be guaranteed, and a circle of anti-skid grooves is provided on the outer surface of the rotating block 608, which can increase the friction force of the outer surface of the rotating block 608, and facilitate the rotation of the rotating block 608, thereby facilitating the rotation of the forward and reverse screw rods 607, and when the moving block 606 slides on the inner wall of the limit frame 605, the guide block 2 610 can slide on the inner wall of the guide groove 2 609, and the moving block 606 can be guided and limited, and the stability of the moving block 606 during movement can be guaranteed.

[0028] The working steps of this embodiment are as follows: like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, when the electric meter calibrator 5 needs to be disassembled, the rotating block 608 is first rotated, and the rotating block 608 can drive the forward and reverse screw rods 607 to rotate. By utilizing the threaded cooperation between the forward and reverse screw rods 607 and the two moving blocks 606, the rotation of the forward and reverse screw rods 607 can make the two moving blocks 606 move away from each other, thereby driving the two L-shaped clamping plates 601 to move away from each other under the guidance of the guide groove 1 603 and the guide block 1 604, thereby releasing the limit of the electric meter calibrator 5, facilitating the disassembly of the electric meter calibrator 5, facilitating the maintenance and subsequent replacement of the electric meter calibrator 5, placing the repaired electric meter calibrator 5 between the two L-shaped clamping plates 601, and rotating the rotating block 608 in the opposite direction can drive the forward and reverse screw rods 607 to rotate in the opposite direction, thereby making the two moving blocks 606 approach each other, thereby driving the two L-shaped clamping plates 601 approach each other, thereby facilitating the clamping and carrying of the electric meter calibrator 5, thereby facilitating the reinstallation of the electric meter calibrator 5. Embodiment 3

[0029] like Figure 5 , Figure 6 and Figure 7 As shown, a limit gear 611 is installed on the outer surface of the forward and reverse screw rods 607, a guide frame 612 is fixedly embedded on the upper surface of the limit frame 605, a guide plate 613 is slidably connected to the inner wall of the guide frame 612, a connecting plate 614 is installed on the bottom surface of the guide plate 613, a limit plate 615 is installed on the bottom end of the connecting plate 614, and the limit plate 615 is adapted to the limit gear 611, two springs 616 are installed between the guide plate 613 and the inner top wall of the guide frame 612, a pull rod 617 is installed on the upper surface of the guide plate 613, and a pull ring 618 is installed on the top of the pull rod 617.

[0030] In this embodiment, a through groove matched with the connecting plate 614 is provided on the inner bottom wall of the guide frame 612, so that the bottom end of the connecting plate 614 can pass through the inner wall of the through groove and extend to the outside of the guide frame 612, and the outer surface of the connecting plate 614 is slidably connected to the inner wall of the through groove, and the bottom end of the limit plate 615 is engaged with the teeth of the limit gear 611, so that the limit gear 611 can be limited, and a sliding hole is provided on the upper surface of the guide frame 612, so that the top end of the pull rod 617 can pass through the sliding hole and extend to the outside of the guide frame 612, and the outer surface of the pull rod 617 is slidably connected to the inner wall of the sliding hole, and the spring 616 is provided to provide elastic force to the guide plate 613 and the connecting plate 614, so that the limit plate 615 can be firmly engaged in the teeth of the limit gear 611, so that the limit gear 611 can be limited.

[0031] The working steps of this embodiment are as follows: like Figure 5 , Figure 6 and Figure 7 As shown, when the forward and reverse screw rods 607 need to be rotated, first pull the pull ring 618 upwards, and the pull ring 618 can drive the pull rod 617 to move upwards, so that the pull rod 617 can drive the guide plate 613 to slide on the inner wall of the guide frame 612, so that the guide plate 613 can drive the connecting plate 614 and the limit plate 615 to move upwards, so that the limit plate 615 can be moved away from the limit gear 611, and the limit on the limit gear 611 can be released, thereby releasing the limit on the forward and reverse screw rods 607, and facilitating the rotation of the forward and reverse screw rods 607. Embodiment 4

[0032] like Figure 2 and Figure 3As shown, the damping assembly 12 includes a circle of damping pattern 121 opened on the outer surface of the reel-up shaft 7 and a sliding frame 122 installed on the inner bottom wall of the protective box 1, the inner wall of the sliding frame 122 is slidably connected with a slide plate 123, a spring 124 is installed between the bottom surface of the slide plate 123 and the inner bottom wall of the sliding frame 122, a damping block 125 is installed on the top of the slide plate 123, and the damping block 125 is adapted to the damping pattern 121.

[0033] In this embodiment, the top end of the slide plate 123 passes through the inner top wall of the slide frame 122 and extends to the top of the slide frame 122, and the outer surface of the slide plate 123 is slidably connected to the penetration point of the slide frame 122. The spring 124 is provided to provide elastic force to the slide plate 123. The damping block 125 is matched with the damping pattern 121 opened on the outer surface of the winding shaft 7. The damping pattern 121 opened can increase the friction force of the outer surface of the winding shaft 7.

[0034] The working steps of this embodiment are as follows: like Figure 2 and Figure 3 As shown, spring 2 124 can provide elastic force to the slide plate 123, so that the slide plate 123 and the damping block 125 can be subjected to upward elastic force, and the damping block 125 can be in close contact with the damping pattern 121. When the reeling shaft 7 rotates inside the protective box 1, the damping force between the damping block 125 and the damping pattern 121 can avoid unnecessary rotation of the reeling shaft 7, and can conveniently damp the rotation of the reeling shaft 7.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0036] It should be noted that the standard parts used in the present invention can all be purchased from the market, special-shaped parts can be customized according to the instructions and drawings, and the specific connection methods of each part adopt mature conventional means such as bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the inventor will not elaborate here.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A multifunctional smart meter calibration device, comprising a protection box (1), characterized in that: The front of the protection box (1) is provided with a box door (2), the front of the box door (2) is provided with a handle (3), the upper surface of the protection box (1) is provided with a handle (4), the interior of the protection box (1) is provided with an electric meter calibrator (5), the exterior of the electric meter calibrator (5) is provided with a clamping assembly (6), the inner wall of the protection box (1) is rotatably connected to a reel-up shaft (7), the outer surface of the reel-up shaft (7) is wound with a calibration wire (8), the top end of the calibration wire (8) is connected to the electric meter calibrator (5), and the reel-up shaft (7) is provided with a clamping assembly (6). The left end of the retracting shaft (7) is fixedly connected to a turntable (9), the inner bottom wall of the protection box (1) is fixedly inlaid with a silicone sleeve (10), the bottom end of the verification wire (8) passes through the silicone sleeve (10) and extends to the outside of the protection box (1), the bottom end of the verification wire (8) is installed with a verification connector (11), the outside of the retracting shaft (7) is provided with a damping component (12), and the left and right sides of the protection box (1) are each provided with a group of heat dissipation grooves (13), and the inner wall of each heat dissipation groove (13) is installed with a filter (14).

2. A multifunctional smart meter calibration device according to claim 1, characterized in that: The clamping assembly (6) comprises two L-shaped clamping plates (601) located inside the protection box (1), and a group of rubber strips (602) are installed on the inner walls of the two L-shaped clamping plates (601), and the rubber strips (602) are in contact with the electric meter calibrator (5).

3. A multifunctional smart meter calibration device according to claim 2, characterized in that: The clamping assembly (6) further comprises a guide groove (603) formed on the inner wall of the protective box (1), the inner wall of the guide groove (603) being slidably connected to two guide blocks (604), and the two guide blocks (604) are respectively connected to two L-shaped clamping plates (601).

4. A multifunctional smart meter calibration device according to claim 2, characterized in that: The clamping assembly (6) further comprises a limit frame (605) fixedly embedded in the back of the protection box (1), the inner wall of the limit frame (605) being slidably connected to two moving blocks (606), and the moving blocks (606) are connected to the L-shaped clamping plate (601).

5. A multifunctional smart meter calibration device according to claim 4, characterized in that: The inner wall of the limit frame (605) is rotatably connected to a forward and reverse screw rod (607), the two moving blocks (606) are both threadedly connected to the forward and reverse screw rod (607), and a rotating block (608) is installed at the right end of the forward and reverse screw rod (607).

6. A multifunctional smart meter calibration device according to claim 4, characterized in that: The inner wall of the limit frame (605) is provided with a second guide groove (609), the inner wall of the second guide groove (609) is slidably connected to two second guide blocks (610), and the second guide blocks (610) are connected to the moving block (606).

7. A multifunctional smart meter calibration device according to claim 5, characterized in that: A limit gear (611) is installed on the outer surface of the forward and reverse screw rods (607), a guide frame (612) is fixedly embedded on the upper surface of the limit frame (605), and a guide plate (613) is slidably connected to the inner wall of the guide frame (612).

8. A multifunctional smart meter calibration device according to claim 7, characterized in that: A connecting plate (614) is installed on the bottom surface of the guide plate (613), a limiting plate (615) is installed on the bottom end of the connecting plate (614), and the limiting plate (615) is matched with the limiting gear (611).

9. A multifunctional smart meter calibration device according to claim 7, characterized in that: Two springs (616) are installed between the guide plate (613) and the inner top wall of the guide frame (612), a pull rod (617) is installed on the upper surface of the guide plate (613), and a pull ring (618) is installed on the top end of the pull rod (617).

10. The multifunctional smart meter calibration device according to claim 1, characterized in that: The damping assembly (12) comprises a circle of damping patterns (121) formed on the outer surface of the reeling shaft (7) and a sliding frame (122) mounted on the inner bottom wall of the protective box (1); the inner wall of the sliding frame (122) is slidably connected with a sliding plate (123); a spring 2 (124) is mounted between the bottom surface of the sliding plate (123) and the inner bottom wall of the sliding frame (122); a damping block (125) is mounted on the top of the sliding plate (123), and the damping block (125) is matched with the damping pattern (121).

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