A quick connecting device for an electric energy meter

Abstract

The application provides a kind of electric energy meter fast connecting device, belongs to electric energy meter verification connection technical field, the electric energy meter fast connecting device includes screw and conversion head;The screw nut is provided with metal sleeve on the screw, the screw is used to install in the threaded hole of each phase terminal of electric energy meter;The conversion head includes insulating block, sleeve and wire, one end of the wire is electrically connected with one end of the sleeve, the other end of the wire is provided with a connection terminal for connecting with the verification instrument;The insulating block is sleeved at the connection of the wire and the sleeve electrically connected;The sleeve first end is integrally connected with the screw nut, and the sleeve second end is used for sleeving with the other end of the sleeve.The device of the application adopts sleeve connection mode to quickly realize the connection of electric energy meter and verification instrument, and the connection operation is simple and convenient, and the connection is reliable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric energy meter calibration connection, and particularly relates to a quick electric energy meter connection device. BACKGROUND

[0002] The real-time load calibration of an electric energy meter is performed by using an electric energy meter calibrator. During calibration, a connection wire with one end being a crocodile clip and the other end being a terminal is used to connect the calibrator and the electric energy meter. The crocodile clip is used to clamp the terminal screw between the phase separators of the electric energy meter.

[0003] Due to the very small space between the phase separators of the electric energy meter, the height of the electric energy meter is usually not always level with the line of sight of the operator during on-site operation. Under the condition that the operator wears thick and heavy insulating gloves, it is difficult to easily open the crocodile clip and stably clamp the crocodile clip on the terminal screw of the electric energy meter. In addition, the crocodile clip is also prone to mistakenly touching other live parts of the electric energy meter or even clamping the wrong position to cause phase-to-phase short circuit. SUMMARY

[0004] The present application aims to overcome the shortcomings of the prior art and provides a quick electric energy meter connection device to solve the problem that it is difficult to easily open the crocodile clip and stably clamp the crocodile clip on the terminal screw of the electric energy meter when the operator uses the crocodile clip to connect the terminal screw of the electric energy meter. In addition, the crocodile clip is also prone to mistakenly touching other live parts of the electric energy meter or even clamping the wrong position to cause phase-to-phase short circuit.

[0005] The present application provides a quick electric energy meter connection device, which comprises a screw and a conversion head.

[0006] A metal sleeve is arranged on the screw cap of the screw, and the screw is used to be installed in the threaded hole of each phase terminal of the electric energy meter.

[0007] The conversion head comprises an insulating block, a sleeve and a wire. One end of the wire is electrically connected with one end of the sleeve, and the other end of the wire is provided with a connection terminal for connecting with the calibrator. The insulating block is sleeved on the connection part of the wire and the sleeve.

[0008] The first end of the sleeve is integrally connected with the screw cap, and the second end of the sleeve is used to be sleeved with the other end of the sleeve.

[0009] Preferably, a groove is arranged on the screw cap of the screw, the inner diameter of the sleeve is greater than the outer diameter of the groove, and the axis of the sleeve coincides with the center line of the groove. The groove is used for inserting the blade of a screwdriver to rotate the screw.

[0010] Further preferably, at least one L-shaped bayonet is arranged on the pipe wall of the second end of the sleeve.

[0011] The sleeve surface is provided with at least one catch.

[0012] Further preferably, the opening of the L-shaped notch comprises a first side and a second side, the first side is perpendicular to the screw cap, and the distance between the first side and the second side decreases from top to bottom within a preset depth range from the opening.

[0013] Further preferably, the pipe wall of the second end of the sleeve is provided with two L-shaped notches, and the two L-shaped notches are located on both sides of the sleeve and take the center of the sleeve as the symmetric center.

[0014] The two catches are symmetrically arranged on both sides of the sleeve surface, and the two catches correspond to the two L-shaped notches.

[0015] The inner diameter of the sleeve is smaller than the length of the groove.

[0016] Further preferably, the opening of the L-shaped notch comprises a first side and a second side, the first side is perpendicular to the screw cap, and the distance between the first side and the second side decreases from top to bottom within a preset depth range from the opening.

[0017] Preferably, the outer surface of the second end of the sleeve is provided with a catch, the side wall of the sleeve is provided with an L-shaped notch matched with the catch, and the outer diameter of the sleeve is smaller than the inner diameter of the sleeve.

[0018] The inner diameter of the sleeve is smaller than the length of the groove.

[0019] Further preferably, the width of the opening of the L-shaped notch gradually decreases from the starting end of the opening.

[0020] Preferably, the sleeve is a solid structure, and the end surface of the second end of the sleeve is provided with a groove; the inner surface of the second end of the sleeve is provided with a catch, the side wall of the sleeve is provided with an L-shaped notch matched with the catch, and the outer diameter of the sleeve is smaller than the inner diameter of the sleeve.

[0021] Further preferably, the groove is a cross groove or a flat mouth groove.

[0022] From the above technical solutions, the present application has the following advantages:

[0023] This invention provides a quick connection device for an electricity meter. The screws, equipped with sleeves and grooves, are pre-installed on the threads of each phase terminal of the electricity meter to replace existing conventional wiring screws. During calibration, the sleeves of the converter heads are fitted onto the sleeves of the screws in each phase, and the connection terminals of the wires of each converter head are connected to the calibrator. This allows for quick connection between the electricity meter and the calibrator. This sleeve connection method is simple, convenient, and reliable, avoiding the difficulties encountered when using alligator clips on conventional electricity meter wiring screws. It also avoids the problems of alligator clips accidentally contacting other live parts of the electricity meter or even being clamped in the wrong position, causing phase-to-phase short circuits. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Fig. 1 This is a schematic diagram illustrating an application scenario of a quick connection device for an electricity meter provided in an embodiment of the present invention;

[0026] Fig. 2 This is a schematic diagram of a quick connection device for an electricity meter provided in an embodiment of the present invention;

[0027] Fig. 3 A perspective view of a screw for a quick connection device for an electricity meter provided in an embodiment of the present invention;

[0028] Fig. 4 A perspective view of a converter head for a quick connection device for an electricity meter provided in an embodiment of the present invention;

[0029] Fig. 5 Figure 1 shows an L-shaped bayonet for a quick connection device for an electricity meter provided in an embodiment of the present invention;

[0030] Fig. 6 Figure 2 shows an L-shaped bayonet for a quick connection device for an electricity meter provided in an embodiment of the present invention;

[0031] The attached drawings are labeled as follows: 1. Screw; 2. Sleeve; 3. Adapter; 4. Insulating block; 5. Sleeve; 6. Wire; 7. Connecting terminal; 8. L-shaped bayonet; 9. Locking pin; 10. Energy meter; 11. Groove. Detailed Implementation

[0032] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0033] In the description of this application, it should be noted that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, 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 application.

[0034] Unless otherwise expressly specified and limited, the terms "connection," "fixed," and "set" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; or they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, unless otherwise expressly specified.

[0036] This invention provides a quick connection device for electricity meters, such as... Figs. 1-4 As shown, it includes screw 1 and adapter head 3;

[0037] The screw 1 has a metal sleeve 2 on its nut. The screw 1 is used to install at the threaded inner hole of each phase terminal of the electricity meter 10. Specifically, it needs to be installed at the threaded inner hole of the terminal of phase "A", "B", "C" or "N" of the electricity meter 10. That is, the terminal screws of the electricity meter 10 need to be replaced and modified uniformly. It should be noted that the screw 1 can also be made by adding the sleeve 2 to the galvanized round head cross screw with the terminal of the electricity meter.

[0038] The adapter 3 includes an insulating block 4, a sleeve 5, and a wire 6. One end of the wire 6 is electrically connected to one end of the sleeve 5, and the other end of the wire 6 is provided with a connection terminal 7 (not shown in the figure) for connecting to the calibrator. The insulating block 4 is sleeved at the connection point where the wire 6 and the sleeve 5 are electrically connected.

[0039] The first end of sleeve 2 is integrally connected to the nut of screw 1, and the other end of sleeve 5 is used to fit onto the second end of sleeve 2, specifically, as follows: Fig. 2 As shown, the outer diameter of the sleeve 5 can be set to be 0-1 mm smaller than the inner diameter of the sleeve 2, so that the sleeve 5 fits into the sleeve 2 tightly. Alternatively, the inner diameter of the sleeve 5 can be set to be 0-1 mm larger than the outer diameter of the sleeve 2, so that the sleeve 5 is fitted onto the outer wall of the sleeve 2.

[0040] This invention provides a quick connection device for an electricity meter. A screw 1 with a sleeve 2 is pre-installed in the threaded inner hole of each phase terminal of the electricity meter 10 to replace the existing conventional wiring screws. During calibration, the sleeve 5 of the adapter 3 is fitted onto the sleeve 2 of each phase screw 1, and the connection terminals 7 of the wires 6 of each adapter 3 are connected to the calibrator. This quickly connects the electricity meter 10 to the calibrator. This fitting connection method is simple, convenient, and reliable. It avoids the difficulty in easily opening the alligator clips and ensuring they are firmly clamped onto the electricity meter's wiring screws when using alligator clips. It also avoids the problem of the alligator clips accidentally touching other live parts of the electricity meter or even being clamped in the wrong position, causing phase-to-phase short circuits.

[0041] In one specific embodiment, the screw 1 has a groove 11 on its nut, the inner diameter of the sleeve 2 is larger than the outer diameter of the groove 11 and the axis of the sleeve 2 coincides with the center line of the groove 11, and the groove 11 is used for inserting the screwdriver blade to rotate the screw 1 for installation.

[0042] In a specific embodiment, such as Figs. 2-4 As shown, at least one L-shaped notch 8 is provided on the wall of the second end of the sleeve 2; at least one locking pin 9 is correspondingly provided on the surface of the sleeve 5. During connection, the locking pin 9 is aligned with the L-shaped notch 8 to allow the sleeve 5 to be inserted into the sleeve 2. Then, the sleeve 5 is rotated to engage the locking pin 9 with the L-shaped notch 8. This ensures the stability of the connection between the sleeve 5 and the sleeve 2, preventing the sleeve 5 from axially moving and detaching from the sleeve 2 due to pulling or other factors. It should be noted that, in this case, the outer diameter of the sleeve 5 can be set to be 0-1 mm smaller than the inner diameter of the sleeve 2, and the locking pin 9 can be set to protrude outwards along the wall of the sleeve 5. This makes it easier and more intuitive to insert the sleeve 5 into the sleeve 2 and engage the locking pin 9 with the L-shaped notch 8. In a more specific embodiment, as... Fig. 5 As shown, the opening of the L-shaped bayonet 8 includes a first side and a second side. The first side is perpendicular to the nut of the screw 1. The distance between the second side and the first side decreases from top to bottom within a preset depth range from the opening. The wide opening design of the starting section of the L-shaped bayonet 8 makes it easier for wiring personnel to insert the locking pin 9 into the L-shaped bayonet 8 and reduces the difficulty of aligning the locking pin 9 with the L-shaped bayonet 8.

[0043] In a more specific embodiment, two L-shaped bayonets 8 are provided on the wall of the second end of the sleeve 2, and the two L-shaped bayonets 8 are located on both sides of the sleeve 2 with the center of the sleeve 2 as the center of symmetry; two locking pins 9 are symmetrically provided on both sides of the surface of the sleeve 5, and the two locking pins 9 correspond one-to-one with the two L-shaped bayonets 8. In this way, the inner diameter of the sleeve 2 can be set to be smaller than the length of the groove 11. Through the cooperation of the two locking pins 9 and the two L-shaped bayonets 8, the screw 1 can be installed by rotating the sleeve 5 without the need for a screwdriver. It should be noted that at this time, it is necessary to ensure that the wall thickness of the sleeve 2 and the wall thickness of the sleeve 5 are sufficient to ensure that the sleeve 2 and the sleeve 5 have sufficient strength to avoid deformation of the sleeve 2 or the sleeve 5 when tightening the screw 1 by rotating the sleeve 5. Specifically, the wall thickness of the sleeve 2 and the wall thickness of the sleeve 5 can be 1mm. Specifically, as shown in the figure below. Fig. 6 As shown, the opening of the L-shaped bayonet 8 includes a first side and a second side. In this design, the first side is perpendicular to the nut of the screw 1, and the distance between the first side and the second side is a first distance within a first preset depth from the opening. Within a second preset depth below the first preset depth, the distance decreases from top to bottom starting from the first distance. This wide-mouth design at the beginning of the L-shaped bayonet 8 not only makes it easier for wiring personnel to insert and tighten the locking pin 9 in the L-shaped bayonet 8, but also allows the locking pin 9 to be placed in the opening section where the distance between the first side and the second side is the first distance, thereby directly rotating the screw 1 for installation, which facilitates the installation of the screw 1.

[0044] In one specific embodiment, a locking pin 9 is provided on the outer surface of the second end of the sleeve 2, and an L-shaped bayonet 8 matching the locking pin 9 is provided on the side wall of the sleeve 5. The outer diameter of the sleeve 2 is smaller than the inner diameter of the sleeve 5; the inner diameter of the sleeve 2 is smaller than the length of the groove 11. Specifically, the width of the opening of the L-shaped bayonet 8 gradually decreases from the beginning of the opening. Thus, the L-shaped bayonet 8 on the sleeve 5 can be directly matched and connected with the locking pin 9.

[0045] In one specific embodiment, the sleeve 2 is a solid structure (not shown in the figure), and a groove 11 is provided on the end face of the second end of the sleeve 2; a retaining pin 9 is provided on the inner surface of the second end of the sleeve 5, and an L-shaped bayonet 8 matching the retaining pin 9 is provided on the side wall of the sleeve 2. The outer diameter of the sleeve 2 is smaller than the inner diameter of the sleeve 5. The solid structure of the sleeve 2 not only reduces the processing difficulty of the sleeve 2, but also improves the structural strength of the sleeve 2, preventing its deformation and thus improving its durability. Specifically, the groove 11 is a cross groove or a flat groove, so that the screw 1 can be installed using a conventional screwdriver.

[0046] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A quick connection device for an electricity meter, characterized in that: Includes screws and adapters; The screw has a metal sleeve on its nut. The screw is used to replace the original wiring screws of each phase terminal of the electricity meter. The screw is used to be installed in the threaded inner hole of each phase terminal of the electricity meter. The converter head includes an insulating block, a sleeve, and a wire. One end of the wire is electrically connected to one end of the sleeve, and the other end of the wire is provided with a connection terminal for connecting to a calibrator. The insulating block is sleeved at the connection point where the wire and the sleeve are electrically connected. The first end of the sleeve is integrally connected to the nut, and the second end of the sleeve is used to be sleeved with the other end of the sleeve.

2. The quick connection device for an electricity meter according to claim 1, characterized in that: The screw has a groove on its nut, the inner diameter of the sleeve is larger than the outer diameter of the groove, and the axis of the sleeve coincides with the center line of the groove. The groove is used to allow the screwdriver blade to be inserted to rotate the screw.

3. The quick connection device for an electricity meter according to claim 2, characterized in that: At least one L-shaped bayonet is provided on the wall of the second end of the sleeve; At least one locking pin is provided on the surface of the sleeve.

4. The quick connection device for an electricity meter according to claim 3, characterized in that: The L-shaped bayonet opening includes a first side and a second side. The first side is perpendicular to the nut, and the distance between the second side and the first side decreases from top to bottom within a preset depth range from the opening.

5. The quick connection device for an electricity meter according to claim 3, characterized in that: The second end of the sleeve is provided with two L-shaped bayonets, and the two L-shaped bayonets are located on both sides of the sleeve and are symmetrical about the center of the sleeve. Two locking pins are symmetrically arranged on both sides of the sleeve surface, and the two locking pins correspond one-to-one with the two L-shaped bayonets; The inner diameter of the sleeve is smaller than the length of the groove.

6. The quick connection device for an electricity meter according to claim 5, characterized in that: The L-shaped bayonet opening includes a first side and a second side. The first side is perpendicular to the nut. The distance between the first side and the second side is a first distance within a first preset depth from the opening. Within a second preset depth below the first preset depth, the distance decreases from the first distance from top to bottom.

7. The quick connection device for an electricity meter according to claim 2, characterized in that: A locking pin is provided on the outer surface of the second end of the sleeve, and an L-shaped bayonet matching the locking pin is provided on the side wall of the sleeve. The outer diameter of the sleeve is smaller than the inner diameter of the sleeve. The inner diameter of the sleeve is smaller than the length of the groove.

8. The quick connection device for an electricity meter according to claim 7, characterized in that: The width of the L-shaped bayonet opening gradually decreases from the beginning of the opening.

9. A quick connection device for an electricity meter according to claim 1, characterized in that: The sleeve is a solid structure, and a groove is provided on the end face of the second end of the sleeve; a locking pin is provided on the inner surface of the second end of the sleeve, and an L-shaped bayonet matching the locking pin is provided on the side wall of the sleeve; the outer diameter of the sleeve is smaller than the inner diameter of the sleeve.

10. A quick connection device for an electricity meter according to claim 9, characterized in that: The groove is a cross-shaped groove or a flat groove.

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