Portable electric energy meter field calibrator

Abstract

The utility model discloses a portable electric energy meter on-site calibrator. The check meter body is provided with a wiring end, the detection wire is connected with the wiring end, the back surface of the check meter body is provided with a wire take-up mechanism used for taking up and paying off the detection wire, and the wire take-up mechanism is provided with a wire inlet and a wire outlet. And one end, far away from the wiring end, of the detection wire is arranged along the wire inlet, the wire take-up mechanism and the wire outlet in sequence and extends to the outer side of the wire take-up mechanism. The check meter body is provided with the take-up mechanism which can be used for take-up and pay-off of the detection wire, and the detection wire can be connected with the wiring end for a long time, so that the check and test of the electric energy meter can be carried out at any time in the use process, repeated plugging is not needed, and the wiring end and a detection wire connector are prevented from being abraded; and when the detection line is not used, the detection line can be wound on the take-up mechanism, so that the problems of winding and knotting of the detection line are effectively avoided, and abrasion and aging caused by random placement can be prevented.

Description

Technical Field

[0001] This utility model relates to the field of electricity meter technology, and in particular to a portable electricity meter field verification instrument. Background Technology

[0002] An on-site energy meter calibrator is a device specifically designed for on-site testing and calibration of energy meters. It verifies the metering accuracy of energy meters under different load conditions, ensuring accurate energy measurement. It also checks the functionality of various energy meter functions, including forward and reverse metering, and the display and recording of parameters such as instantaneous voltage, current, and power. A typical energy meter calibrator consists of a current source, a standard energy meter, and a power standard instrument, meeting the calibration and testing needs of power companies, testing institutions, and industrial users.

[0003] Electricity meter field calibrators are typically lightweight and portable, facilitating measurements in various environments. Existing field calibrators are equipped with a display screen and control panel. During calibration, users need to connect two sets of test leads to the output terminals of the calibrator. However, these leads are stored separately when not in use and are easily lost during transport. Improper management can easily cause delays in future calibration work. Furthermore, the exposed terminals pose a safety hazard due to ease of wiring. Therefore, a portable electricity meter field calibrator is urgently needed to solve these problems. Utility Model Content

[0004] To address the aforementioned issues, this utility model provides a portable on-site energy meter calibrator, comprising a calibrator body and a detection line. The calibrator body has a terminal block, and the detection line is connected to the terminal block. The back of the calibrator body has a take-up mechanism for taking in and out the detection line. The take-up mechanism has an inlet and an outlet. The end of the detection line furthest from the terminal block is sequentially laid along the inlet, the take-up mechanism, and the outlet, extending to the outside of the take-up mechanism.

[0005] Furthermore, the take-up mechanism includes a take-up box and a winding reel. The inlet and outlet are both located on the take-up box. The winding reel is rotatably mounted inside the take-up box. The detection wire is at least partially wound on the winding reel. A drive unit for driving its rotation is connected to the winding reel.

[0006] Furthermore, the drive unit includes a handle that is connected to the winding spool and located at the center of the winding spool.

[0007] Furthermore, there are two detection lines, two winding reels, and two outlets. The two winding reels are arranged side by side inside the take-up box, and the two outlets are respectively located on opposite side walls of the take-up box. The detection lines, winding reels, and outlets are arranged in a one-to-one correspondence.

[0008] Furthermore, the take-up mechanism also includes a take-up cover plate, which is hinged to the take-up box.

[0009] Furthermore, the diameter of the outlet is smaller than the size of the detection head of the detection line.

[0010] Furthermore, the take-up mechanism also includes a protective tube, which is disposed outside the take-up box and communicates with the outlet. The inner diameter of the protective tube is larger than the size of the detection head of the detection line.

[0011] Furthermore, the calibrator body is also provided with a protective mechanism, which covers the terminal block inside. The end of the detection line away from the terminal block is arranged sequentially along the protective mechanism, the take-up mechanism and the outlet and extends to the outside of the take-up mechanism.

[0012] Furthermore, the protective mechanism is connected to the take-up mechanism via a conduit.

[0013] Furthermore, the protective mechanism includes a protective box, a protective cover, and a wire plate. The protective box is installed on the calibrator body, the wiring terminal is located inside the protective box, the protective cover is hinged to the protective box, the wire plate is located inside the protective box and on the path of the detection line, the wire plate has a wire hole, and the detection line is laid along the wire hole.

[0014] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0015] 1) The portable energy meter field calibrator provided by this utility model has a cable winding mechanism on the calibrator body, which can be used to wind up and unwind the test cable. The test cable can be connected to the terminal for a long time to ensure that the energy meter can be calibrated and tested at any time during use without repeated plugging and unplugging, thus avoiding wear on the terminal and test cable connector. When the test cable is not in use, it can be wound up on the cable winding mechanism, effectively avoiding the problem of the test cable tangling and knotting, and also preventing wear and aging caused by careless placement.

[0016] 2) The portable power meter field tester provided by this utility model has a protective mechanism on the tester body. The wiring terminal is located inside the protective box. The protective box and protective cover can play a role in waterproofing and dustproofing, thereby reducing potential damage to the wiring terminal and improving the reliability and durability of the connection.

[0017] 3) The portable power meter field tester provided by this utility model has a cover plate hinged to the protective box and the cable take-up box, which facilitates the replacement and maintenance of the test line. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 Exploded view of the portable energy meter field tester provided by this utility model;

[0020] Figure 2 A schematic diagram of the structure of the portable energy meter field tester provided by this utility model;

[0021] Figure 3 A cross-sectional view of the portable energy meter field tester provided by this utility model;

[0022] Figure 4 The portable power meter field tester provided by this utility model Figure 3 Enlarged view of part A.

[0023] 1-Calibrator body; 11-Connecting terminal; 12-Display screen; 13-Operation panel; 2-Detection line; 21-Connector; 22-Detection head; 3-Protective mechanism; 31-Protective box; 32-Protective cover; 33-Wire guide plate; 34-Hinge; 35-Wire hole; 4-Take-up mechanism; 41-Outlet; 42-Take-up box; 43-Winding reel; 44-Shaft; 45-Bearing seat; 46-Protective tube; 47-Handle; 48-Snap-on block; 49-Snap-on groove; 410-Take-up cover; 412-Bearing; 5-Wire routing tube. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. In the accompanying drawings, the dimensions and relative dimensions of certain parts may be enlarged for clarity.

[0025] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "connected" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0026] In the description of this utility model, the terms "upper", "lower", "left", "right", "front", "back", "center", "horizontal", "vertical", "top", "bottom", "inner", and "outer" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, in the description of this utility model, the terms "first" and "second" are used merely for descriptive distinction and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Additionally, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0028] As per the instruction manual Figure 1-4 As shown, this utility model provides a portable on-site power meter calibrator, including a calibrator body 1 and a test line 2. The calibrator body 1 has a terminal 11, and the test line 2 is connected to the terminal 11. The back of the calibrator body 1 is provided with a take-up mechanism 4 for taking up and putting down the test line 2. The take-up mechanism 4 has an inlet and an outlet 41. The end of the test line 2 away from the terminal 11 is laid out along the inlet, the take-up mechanism 4 and the outlet 41 in sequence and extends to the outside of the take-up mechanism 4.

[0029] Specifically, the front of the calibrator body 1 is equipped with a display screen 12 and an operation panel 13 for user operation and data acquisition. Electrical components are installed inside the calibrator body 1, and the test lines 2 are connected to these components via terminals 11. Since the calibrator body 1 has two test lines 2, it has two terminals 11, with each test line 2 corresponding to one terminal 11. In this embodiment, the take-up mechanism 4 is located on the back of the calibrator body 1. The two ends of the test line 2 are a connector 21 and a test head 22, respectively. The connector 21 is connected to the terminal 11. The test line is laid out sequentially through the inlet, take-up mechanism 4, and outlet 41. The test line 2 extends from the outlet 41 to the outside of the take-up mechanism 4 and is connected to the test head 22 for testing and calibration. When not in use, the test line 2 can be wound up in the take-up mechanism 4, facilitating storage, protecting the test line 2, and keeping the calibrator clean.

[0030] In an optimized implementation, the take-up mechanism 4 includes a take-up box 42 and a winding reel 43. The inlet and outlet 41 are both located on the take-up box 42. The winding reel 43 is rotatably mounted inside the take-up box 42. The detection wire 2 is at least partially wound on the winding reel 43. A drive unit for driving its rotation is connected to the winding reel 43.

[0031] Specifically, the take-up mechanism 4 further includes a rotating shaft 44 and a bearing seat 45. The take-up box 42 is mounted on the calibrator body 1, and the side of the take-up box 42 facing the calibrator body 1 is open. The outlet 41 is opened on the take-up box 42. The bearing seat 45 is mounted on the back of the calibrator body 1 and located inside the take-up box 42. The winding reel 43 is connected to the bearing seat 45 through the rotating shaft 44. The rotating shaft 44 and the winding reel 43 are coaxially arranged. The winding reel 43 has a winding area. When winding, the detection wire is wound around the winding area. The winding reel 43 is connected to a drive unit for driving its rotation.

[0032] In this embodiment, two winding reels 43 are provided, arranged side by side inside the take-up box 42. Each winding reel 43 can hold one detection wire 2. The two winding reels 43 are driven by the same method and can be driven independently. Correspondingly, two wire outlets 41 are also provided, respectively located on opposite side walls of the take-up box 42. The detection wire 2, winding reels 43, and wire outlets 41 are arranged in a one-to-one correspondence. The winding reels 43 can rotate clockwise or counterclockwise under the action of the driving unit, thereby realizing the winding and unwinding of the detection wire 2. When winding, the winding reel 43 is rotated, and the detection wire 2 is wound around in the winding area one turn at a time; when unwinding, the detection head at the end of the detection wire is pulled to unfold the detection wire.

[0033] In an optimized implementation, the drive unit includes a handle 47, one end of which has a locking block 48. The winding reel 43 has a locking groove 49 on the side away from the bearing seat 45, and the locking block 48 engages with the locking groove 49. The locking groove 49 is located at the center of the winding reel 43. The locking block 48 of the handle 47 is inserted into the locking groove 49 and engaged with it. Rotating the handle 47 drives the winding reel to rotate.

[0034] In an optimized implementation, the diameter of the outlet 41 is smaller than the size of the detection head 22 of the detection line 2. When the detection line 2 is wound up, the detection head 22 can be left outside the outlet 41, which facilitates the unfolding of the detection line 2 and the verification operation.

[0035] In an optimized implementation, the take-up mechanism 4 further includes a protective tube 46. The protective tube 46 is located outside the take-up box 42 and communicates with the outlet 41. The detection wire 2 exiting from the outlet 41 is laid along the protective tube 46. The inner diameter of the protective tube 46 is larger than the size of the detection head of the detection wire 2, while the diameter of the outlet 41 is smaller than the size of the detection head of the detection wire 2. The outlet 41 allows the detection wire 2 to pass through, but not the detection head. During take-up, the detection head cannot pass through the outlet 41 and is therefore housed within the protective tube 46, preventing the detection wire from being difficult to unfold due to excessive take-up. The protective tube 46 can house and protect the detection head. The diameter of the outlet 41 is larger than the size of the connector of the detection wire 2, allowing the connector to pass through, facilitating the replacement of the detection wire.

[0036] In an optimized implementation, the axial direction of the outlet is perpendicular to the axial direction of the winding reel 43, that is, the outlet 41 is opened on the side wall of the take-up box 42, and the protective tube 46 is provided corresponding to the outlet 41 and installed on the side wall of the take-up box 42.

[0037] Preferably, the protective tube 46 is coaxially arranged with the outlet 41.

[0038] In an optimized implementation, the take-up mechanism 4 further includes a take-up cover 410, which is hinged to the take-up box 42. One end of the take-up cover 410 is connected to the take-up box 42 via a hinge, preferably an automatic closing hinge, which allows the take-up cover 410 to close automatically. The take-up cover 410 ensures that the take-up box 402 is waterproof and dustproof, and facilitates the maintenance and replacement of the take-up mechanism 4 and the detection line 2. One end of the handle 47, which has a locking block 48, extends into the take-up cover 410, while the other end of the handle 47 is located on the outside of the take-up cover 410. The handle 47 is connected to the take-up cover 410 via a bearing 412, with the outer ring of the bearing fixedly connected to the take-up cover 410 and the handle 47 fixedly connected to the inner ring of the bearing.

[0039] In an optimized implementation, the calibrator body 1 is further provided with a protective mechanism 3, which covers the terminal 11 inside. The end of the detection line 2 away from the terminal 11 is arranged sequentially along the protective mechanism 3, the take-up mechanism 4 and the outlet 41 and extends to the outside of the take-up mechanism 4.

[0040] Specifically, the protective mechanism 3 and the take-up mechanism 4 can be an integrated or separate structure. In this embodiment, the protective mechanism 3 and the take-up mechanism 4 are separate structures, and they are connected by a cable conduit 5.

[0041] In an optimized implementation, the protective mechanism 3 includes a protective box 31, a protective cover 32, and a wire guide plate 33. The protective box 31 is mounted on the calibrator body 1, with an open bottom. The wiring terminal 11 is located inside the protective box 31. The cable conduit 5 communicates with the protective box 31 and the cable take-up box 42. The protective cover 32 is hinged to the protective box 31, and one end of the protective cover 32 is connected to the protective box 31 via a second hinge 34. The second hinge 34 is preferably an automatic closing hinge, which allows the protective cover 32 to close automatically, ensuring that the protective box 31 is waterproof and dustproof. The wire guide plate 33 is located inside the protective box 31 and between the wiring terminal 11 and the cable conduit 5. The wire guide plate 33 has wire holes 35, and the detection wire 2 is laid along the wire holes 35.

[0042] In the optimized real-time mode, the protective mechanism 3 is located at the top of the calibrator body 1, and the wire take-up mechanism 4 is located on the back of the calibrator body 1. The cable routing tube 5 is an L-shaped bend, and the section of the cable routing tube 5 connected to the protective box 31 is coaxially arranged with the wire hole. The test wire 2 enters the take-up box 42 through the wire hole 35 and the cable routing tube 5 in sequence, winds around the winding reel 43, and then comes out through the protective tube 46.

[0043] The working principle of the portable energy meter field calibrator provided by this utility model is as follows: when using the calibrator body 1 and the test line 2, the test head of the test line 2 in the protective tube 46 is pulled out and connected to the power meter wiring. After the test is completed, the test head of the test line is unplugged, and the handle 47 is turned. The handle 47 drives the winding reel 43 to rotate and wind the test line 2 onto the winding reel 43. When the test head of the test line 2 is wound inside the protective tube 46, the outlet can restrict the test head from continuing to wind. When the test line needs to be replaced, open the protective cover 32, unplug the test line, disconnect the connector from the terminal, and pull out the test line from the test head inside the protective tube 46. When installing the new test line 2, first remove the test head of the test line 2, insert the connector of the test line 2 into the terminal 11, and pass the other end of the test line 2 through the wire hole 35 and the cable tube 5 in sequence, wrap it around the winding reel 43, and then pass it through the outlet 41 and the protective tube 46. Install the test head on the end of the test line 2 that passes through the protective tube 46, close the cover, and rotate the locking block of the handle 47 to connect with the locking slot to complete the test line replacement.

[0044] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0045] Those skilled in the art will understand that this invention can be implemented in many other specific forms without departing from the spirit and scope of this invention. Although embodiments of this invention have been described, it should be understood that this invention is not limited to these embodiments, and those skilled in the art can make changes and modifications within the spirit and scope of this invention as defined in the appended claims.

Claims

1. A portable electric energy meter field calibrator, comprising a calibrator body and a detection line, characterized in that, The check instrument body is provided with a wiring terminal, the detection line is connected with the wiring terminal, the back of the check instrument body is provided with a take-up mechanism for winding and unwinding the detection line, the take-up mechanism is provided with a wire inlet and a wire outlet, the take-up mechanism comprises a take-up box and a winding disc, the wire inlet and the wire outlet are arranged on the take-up box, the winding disc is rotatably installed in the take-up box, the detection line is at least partially wound on the winding disc, the winding disc is connected with a driving unit for driving the rotation of the winding disc, and one end of the detection line away from the wiring terminal is arranged and extended to the outside of the take-up mechanism along the wire inlet, the take-up mechanism and the wire outlet in sequence.

2. The portable field calibrator for electric energy meters according to claim 1, characterized in that, The driving unit comprises a handle, and the handle is connected to the winding disc and located at the center of the winding disc.

3. The portable field calibrator for electric energy meters according to claim 1, characterized in that, The number of the detection line, the winding disc and the wire outlet is two, the two winding discs are arranged side by side in the take-up box, the two wire outlets are arranged on the opposite side walls of the take-up box respectively, and the detection line, the winding disc and the wire outlet are arranged one by one.

4. The portable field calibrator for electric energy meters according to claim 1, characterized in that, The take-up mechanism further comprises a take-up cover plate, and the take-up cover plate is hinged to the take-up box.

5. The portable field calibrator for electric energy meters according to claim 1, characterized in that, The diameter of the wire outlet is smaller than the size of the detection head of the detection line.

6. The portable field calibrator for electric energy meters according to claim 5, characterized in that, The take-up mechanism further comprises a protective tube, the protective tube is arranged outside the take-up mechanism and communicates with the wire outlet, and the inner diameter of the protective tube is larger than the size of the detection head of the detection line.

7. The portable field calibrator for electric energy meters according to claim 1, characterized in that, The check instrument body is further provided with a protection mechanism, the protection mechanism covers the wiring terminal, and one end of the detection line away from the wiring terminal is arranged and extended to the outside of the take-up mechanism along the protection mechanism, the take-up mechanism and the wire outlet in sequence.

8. The portable field calibrator for electric energy meters according to claim 7, characterized in that, The protection mechanism communicates with the take-up mechanism through a wire tube.

9. The portable field calibrator for electric energy meters according to claim 7, characterized in that, The protection mechanism comprises a protection box, a protection cover plate and a wire guide plate, the protection box is installed on the check instrument body, the wiring terminal is located in the protection box, the protection cover plate is hinged to the protection box, the wire guide plate is arranged in the protection box and located on the arrangement path of the detection line, the wire guide plate is provided with a wire hole, and the detection line is arranged along the wire hole.

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