Short circuit tool for replacing test junction box or direct electric energy meter without power cut

Abstract

The invention relates to the technical field of electric energy metering, and discloses a short-circuit tool for replacing a test junction box or a direct-passing electric energy meter without power cut, the short-circuit tool comprises a box body, the box body comprises a bottom plate and a cover plate, and one end of the bottom plate and one end of the cover plate are hinged together so as to perform opening and closing movement; the top surface of the cover plate is provided with a voltage wiring part used for fixing a voltage lead, the bottom surface of the cover plate and the top surface of the bottom plate are both provided with grooves which are symmetrically arranged, after the cover plate is closed on the bottom plate, the grooves in the corresponding sides are spliced together to form a lead groove through which a current lead passes, and the bottom surface of the cover plate is also provided with a puncture short-circuit part. The piercing short-circuit part comprises blade heads in one-to-one correspondence with the wire grooves and a short-circuit body used for connecting the blade heads on the two sides together, and the blade heads on the two sides can break an insulating sheath of a current wire located in the corresponding wire grooves to make contact with a conductor when the cover plate is closed on the bottom plate; the method has the advantages of being simple in overall operation, good in applicability and capable of guaranteeing that voltage and current wires are not prone to confusion.

Description

Technical Field

[0001] This invention relates to a short-circuit tool for replacing test junction boxes or direct-pass energy meters without power interruption, belonging to the technical field of energy metering. Background Technology

[0002] A test junction box is an auxiliary device used in electricity metering systems. It is typically installed between the electricity meter and current transformers or voltage transformers, serving as a connection and transfer mechanism to facilitate the calibration, maintenance, and repair of the electricity meter. A direct-connection electricity meter, also known as a direct-access electricity meter, is an instrument that can be directly connected to a power line to measure electrical energy.

[0003] Currently, replacing test junction boxes and direct-pass energy meters are crucial aspects of the operation and maintenance of energy metering devices. During the replacement of test junction boxes, the removed wires need to be insulated and wrapped. Currently, insulating tape is commonly used for this purpose. Improper wrapping can easily lead to short circuits and fires. Furthermore, after removing the test junction box, many wires are ready to be connected. If different wire diameters and colors are not used as required, it is difficult to identify the phase sequence and type of each wire. Each wire must be checked individually before it can be accurately connected to the new junction box, severely impacting the efficiency of the junction box replacement work and posing certain safety risks.

[0004] Therefore, in the prior art, Chinese utility model patent application number CN202320157561.7 discloses an auxiliary wiring insulation tool for replacing junction boxes. This tool includes a junction box, a hand-tightening screw, a strong magnetic plate, and a universal clamp. The junction box has wiring holes on both sides and a corresponding screw hole on the front. The wiring holes and screw holes are perpendicularly connected. The hand-tightening screw is inserted into the screw hole to limit the wire position within the wiring hole. The universal clamp is connected to the bottom of the junction box, and a strong magnetic plate is located on the back. When replacing meters, by connecting the wires to the temporary box, it effectively avoids wiring mishaps during restoration, while providing reliable insulation. It has advantages such as improved work efficiency, reduced risk of misoperation, and reduced risk of short circuits and electric shocks due to insufficient use of insulating tape and inadequate wrapping. However, its use requires a complete power outage for an extended period to remove and replace the wires, making it impossible to replace wires without power interruption.

[0005] When a direct-pass electricity meter malfunctions or needs to be replaced, the wires connected to the meter must be disconnected before the meter can be removed and replaced. Currently, there are two ways to replace a direct-pass electricity meter: power outage replacement and live replacement. When replacing a meter during a power outage, both the power supply side switch and the user load side switch need to be disconnected, so that the meter is in a power outage state. The difficulties are: (1) the power outage time needs to be negotiated with the user in advance, and the coordination matters are more complicated when dealing with traffic lights; (2) the user cannot use electricity for normal production and daily life during the power outage; (3) the time from power outage replacement to power restoration is relatively long; (4) the user's power outage operation is complicated and frequent, and electrical equipment failure is likely to occur. When replacing wires while they are energized, you only need to disconnect the user’s load-side switch. However, the difficulties are: (1) When disconnecting wires, insulation wrapping is required according to the wire diameter, winding direction, and length of the uninsulated wire; (2) When connecting wires, the insulation wrapping must be removed and the wire diameter must be adjusted with insulated pliers before it can be inserted into the electricity meter; (3) The power supply side wires are energized while the load side wires are not energized. If they are not properly wrapped during the removal process, they may short-circuit and pose a safety risk.

[0006] To address this, in the prior art, Chinese utility model patent application number CN202222949967.7 discloses a device for replacing an electricity meter by adding a combined junction box without power interruption. This device comprises a short-circuit handle, two wire grooves, and a piercing part. A piercing blade is installed at the bottom of the handle, penetrating the notch and the insulation of the wires and electrically connecting to the conductor. Through the junction box and piercing part: when disassembling the electricity meter, the two wires are fixed in the grooves on the clamp, and tightening the fixing nut causes the fixing bolt to clamp the connecting block, which drives the piercing blade to pierce the insulation of the wires and contact the conductor. The short-circuit operation of the wires through the piercing part and the short-circuit handle enables the replacement of the electricity meter without power interruption. However, this device has the following problems in practical use: First, it is mainly applicable to the replacement of directly connected energy meters. However, under normal circumstances, the test junction box also needs to be replaced when replacing a connected energy meter, and it has not designed a solution suitable for replacing the junction box.

[0007] Second, its blade connects to the wire after cutting into the wire insulation. Since it only relies on a single blade to contact the wire, a reliable connection cannot be guaranteed if poor contact occurs.

[0008] Third, it does not have a solution for the insulation treatment of voltage wires when the junction box is replaced. Voltage wires must be treated separately. It is impossible to treat the same phase voltage and current wires at the same time, which is easy to cause confusion and disorder. At the same time, there is a problem that the piercing blade may be damaged and cannot be replaced when the blade is pierced and crimped. Summary of the Invention

[0009] To address the aforementioned problems in the existing technology, this invention provides a short-circuiting tool for replacing test junction boxes or direct-pass energy meters without power interruption. The short-circuiting tool designed in this invention is not only applicable to the replacement of direct-pass energy meters, but also ensures that the wires are not easily loosened or confused during the replacement process, and simplifies the blade head replacement operation. Furthermore, it can also perform short-circuiting operations on the wires below the junction box during test junction box replacement, enabling power-free replacement of the test junction box.

[0010] The technical solution of the present invention is as follows: A short-circuit tool for replacing test junction boxes or direct-pass energy meters without power interruption includes a box body, which includes a base plate and a cover plate disposed above the base plate. One end of the base plate and the cover plate are hinged together by a hinge to allow for opening and closing. The top surface of the cover plate has a voltage connection part for fixing the voltage secondary circuit conductor connected to the energy meter via a current transformer. Both the bottom surface of the cover plate and the top surface of the base plate have symmetrically arranged grooves. After the cover plate is closed on the base plate, the corresponding grooves are joined together to form a conductor groove for the current conductor to pass through. The bottom surface of the cover plate also has a piercing short-circuit part, which includes a blade head that corresponds one-to-one with the conductor groove and a short-circuit body for connecting the two blade heads together. When the cover plate is closed on the base plate, both blade heads can break through the insulation of the current conductor in the corresponding conductor groove to contact the conductor.

[0011] Furthermore, the blade head has an I-shaped structure or a U-shaped structure.

[0012] Furthermore, the puncture shorting part also includes a blade fixing base that is arranged one-to-one with the blade head. The structure of the blade fixing base is adapted to the structure of the blade head. Both blade fixing bases and the shorting body are embedded in the bottom surface of the cover plate. The shorting body connects the two blade heads together by connecting with the two blade fixing bases. Both blade fixing bases are provided with blade fixing grooves adapted to the structure of the blade head. Both blade heads are detachably connected to the corresponding blade fixing base by inserting into the corresponding side blade fixing groove.

[0013] Furthermore, screw fixing holes are provided on both sides of the blade fixing base, and fixing blocks with blade fixing screws are provided on both sides of the blade head. When the blade heads on both sides are detachably connected to the corresponding blade fixing base, the blade fixing screws on both sides are threaded into the screw fixing holes on the corresponding sides.

[0014] Furthermore, the voltage connection part includes a connection block, and each of the two ends of the connection block has a wire access hole that is not interconnected. The connection block is also threaded with a voltage line fixing screw that is arranged in a one-to-one correspondence with the wire access hole. The voltage line fixing screws on both sides are movably inserted into the corresponding wire access hole.

[0015] Furthermore, each of the grooves is provided with a clearance notch for avoiding the blade head at the corresponding position.

[0016] Furthermore, the top surface of the cover plate is also threaded with current line fixing screws that are correspondingly positioned to the wire grooves, and the current line fixing screws on both sides are movably inserted into the corresponding side wire grooves.

[0017] Furthermore, the current line fixing screws on the same side are arranged symmetrically on the top surface of the cover plate with the center line of the blade head at the corresponding position as the symmetry line.

[0018] Furthermore, both the base plate and the cover plate are provided with fixing ears at their other ends. After the cover plate is closed on the base plate, fixing bolts can pass through the fixing ears on both sides and fixing nuts can be locked into the fixing bolts to fix them together.

[0019] Furthermore, a strong magnetic sheet is also provided on the bottom surface of the base plate.

[0020] The present invention has the following beneficial effects: 1. This invention, through the design of a base plate, cover plate, voltage connection section, wire groove, and piercing short-circuit section, allows for efficient removal of a direct-pass energy meter. By passing two current wires through the wire groove and then closing the cover plate on the base plate, the blades on both sides can pierce the insulation of the two current wires and contact their conductors. Because the blades and short-circuit are conductive, the two current wires are short-circuited together by the action of the blades and the short-circuit. Therefore, removing the direct-pass energy meter will not affect the user's production or residential electricity consumption. Furthermore, when replacing the test junction box after removing the direct-pass energy meter... Similarly, the current conductors of the test junction box can be short-circuited in the above manner to achieve uninterrupted replacement of the test junction box. After the short-circuiting is completed, the voltage secondary circuit conductors connected to the energy meter via the current transformer are fixed into the voltage wiring section. This allows the four conductors on the test junction box to be fixed and insulated separately, thus avoiding confusion in conductor phase sequence and type and solving the problem of voltage conductor insulation. This makes it suitable for uninterrupted replacement of the test junction box. Compared with existing technologies, it has the advantages of simple overall operation, good applicability, and ensuring that voltage and current conductors are not easily confused.

[0021] 2. By setting the blade head to an I-shaped or U-shaped structure, the present invention provides two contact points when the blade head contacts the current conductor. This ensures that even if one contact point fails, the other contact point can still short-circuit the two current conductors together. In addition, the use of current conductor fixing screws further secures the current conductors, minimizing the possibility of poor contact between the current conductors and the blade head. Compared with the prior art, this invention has the advantage of ensuring reliable connection.

[0022] 3. This invention, by setting up blade fixing grooves, fixing blocks, screw fixing holes, and blade fixing screws, allows the blade heads on both sides to be inserted into the corresponding side blade fixing grooves and threadedly connected to the corresponding screw fixing holes to securely and detachably connect to the blade fixing base. When the blade head is damaged, the detachable connection method makes it easy for operators to remove the blade head from the blade fixing base for replacement. Compared with the prior art, this invention has the advantage of enabling the replacement of blade heads. Attached Figure Description

[0023] Figure 1 This is a top view of an embodiment of the present invention; Figure 2 This is a side view of an embodiment of the present invention; Figure 3 This is a schematic diagram of the cover plate in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the base plate in an embodiment of the present invention; Figure 5 This is a schematic diagram of the U-shaped puncture short joint of the blade head in an embodiment of the present invention; Figure 6 This is a schematic diagram of the first structure of the puncture short joint with an I-shaped blade head in an embodiment of the present invention; Figure 7 This is a schematic diagram of the second structure of the puncture short joint with an I-shaped blade head in an embodiment of the present invention.

[0024] The reference numerals in the figure are as follows: 1. Box body; 2. Base plate; 3. Cover plate; 4. Hinges; 5. Voltage wiring section; 51. Wiring block; 52. Wire inlet hole; 53. Voltage wire fixing screw; 6. Groove; 7. Wire groove; 8. Current conductor; 9. Puncture shorting part; 91. Blade head; 92. Shorting body; 93. Blade fixing base; 94. Blade fixing groove; 95. Screw fixing hole; 96. Blade fixing screw; 97. Fixing block; 10. Insulating outer sheath; 11. Clearance notch; 12. Current line fixing screw; 13. Fixing lug; 14. Fixing bolt; 15. Fixing nut; 16. Strong magnetic sheet. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments, but the invention is not limited thereto.

[0026] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," "ascending," and "descending," 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 invention 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 invention.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, "connected" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] Example: Please refer to Figures 1-4 This embodiment provides a short-circuit tool for replacing test junction boxes or direct-pass energy meters without power interruption. The tool includes a box body 1, which includes a base plate 2 and a cover plate 3 disposed on the top of the base plate 2. The right ends of the base plate 2 and the cover plate 3 are hinged together by a hinge 4 to allow for opening and closing. Under the action of the hinge 4, the cover plate 3 can close onto the base plate 2 or move away from the base plate 2. Fixing ears 13 are fixedly provided on the left ends of both the cover plate 3 and the base plate 2. After the cover plate 3 is closed onto the base plate 2, fixing bolts 14 can pass through the fixing ears 13 on both sides and fixing nuts 15 can be locked into the fixing bolts 14 to fix them together. This achieves a fixed connection between the cover plate 3 and the base plate 2 for subsequent work.

[0029] The top surface of the cover plate 3 is provided with a voltage connection part 5 for fixing the voltage secondary circuit wire connected to the energy meter via the current transformer. In this embodiment, the voltage connection part 5 includes a connection block 51 fixedly disposed on the top surface of the cover plate 3. Both ends of the connection block 51 are provided with wire access holes 52, and the wire access holes 52 on both sides are different from each other. The connection block 51 is also threaded with voltage wire fixing screws 53 that are arranged one-to-one with the wire access holes 52. The voltage wire fixing screws 53 on both sides are movably inserted into the corresponding side wire access holes 52, so that when a voltage wire is connected to the wire access hole 52 later, the voltage wire can be fixed in the wire access hole 52 by squeezing the voltage wire.

[0030] Two symmetrically arranged grooves 6 are provided on the bottom surface of the cover plate 3 and the top surface of the base plate 2. After the cover plate 3 is closed on the base plate 2, the grooves 6 on the corresponding sides are joined together to form a wire groove 7 for passing through the current wire 8. A total of two wire grooves 7 are formed, and both wire grooves 7 are cylindrical in shape. In order to allow most current wires 8 to pass through the wire grooves 7, in this embodiment, the diameter of both wire grooves 7 is 2.5mm to 10mm, so that common current wires 8 with diameters of 2.5mm, 4mm, and 5mm can pass through.

[0031] The bottom surface of the cover plate 3 is also provided with a piercing short-circuit part 9. In this embodiment, the piercing short-circuit part 9 includes two blade heads 91 arranged in a one-to-one correspondence with the two wire grooves 7 and a short-circuit body 92 for connecting the two blade heads 91 together. Both the blade heads 91 and the short-circuit body 92 are made of metal materials with good conductivity, such as copper or aluminum. The blade heads 91 should have the characteristics of being strong and wear-resistant to ensure that they are not easily damaged or broken. Therefore, the blade heads 91 can be made of copper alloy material. When the cover plate 3 is closed on the bottom plate 2, both blade heads 91 can break through the insulation sheath 10 of the current wires 8 in the corresponding wire grooves 7 to contact the conductor, so as to realize the short-circuiting of the two current wires 8 together.

[0032] With the aforementioned setup, when removing a direct-pass energy meter, the two current wires 8 of the direct-pass energy meter are passed through the wire groove 7, and then the cover plate 3 is closed onto the base plate 2 and fixed together with fixing bolts 14 and fixing nuts 15. At this time, both sides of the blade head 91 can pierce the insulation sheath 10 of the two current wires 8 and contact the conductor of the current wires 8. Because the blade head 91 and the shorting body 92 are conductive, the two current wires 8 will be short-circuited together under the action of the blade head 91 and the shorting body 92. Therefore, removing the direct-pass energy meter will not affect the user's production and domestic electricity consumption. When the test junction box needs to be replaced after removing the direct-pass energy meter, because... The test junction box has two current conductors 8 and two voltage conductors. Similarly, the two current conductors 8 of the test junction box can be short-circuited in the manner described above to achieve uninterrupted replacement of the test junction box. After short-circuiting the two current conductors 8, the voltage secondary circuit conductors connected to the energy meter via the current transformer, i.e., the two voltage conductors, are respectively connected into different conductor access holes 52 and fixed. This allows the four conductors on the test junction box to be fixed and insulated separately, thereby avoiding confusion in the phase sequence and type of the conductors and solving the problem of voltage conductor insulation treatment. This makes it suitable for uninterrupted replacement of the test junction box.

[0033] To improve the reliability of the contact between the blade tip 91 and the current conductor 8, in this embodiment, the blade tip 91 has an I-shaped or U-shaped structure, which can be selected according to the actual situation. Simultaneously, a current conductor fixing screw 12, corresponding to the position of the conductor groove 7, is threaded onto the top surface of the cover plate 3. Both sides of the current conductor fixing screw 12 are movably inserted into the corresponding side conductor groove 7. This allows the current conductor 8 to be fixed within the conductor groove 7 by squeezing it when it passes through. Furthermore, the current conductor fixing screw 12 on the same side are symmetrically arranged on the top surface of the cover plate 3 with the center line of the blade tip 91 as the symmetrical line, enabling two-point fixing of the current conductor 8. This arrangement provides two contact points when the blade tip 91 contacts the current conductor 8. Even if one point experiences poor contact, the other contact point can still ensure that the two current conductors 8 are short-circuited together. The coordinated arrangement of the current conductor fixing screw 12 further secures the current conductor 8, minimizing the possibility of poor contact between the current conductor 8 and the blade tip 91.

[0034] In actual use, the two blade heads 91 can also be provided with arc-shaped portions adapted to the conductor structure of the current wire 8, so as to expand the contact area with the current wire 8 conductor and further improve the reliability of the contact with the current wire 8. At the same time, each groove 6 can also be provided with a hard rubber layer sleeve, which can increase the friction between it and the current wire 8, thereby further fixing the current wire 8 in the wire groove 7.

[0035] To facilitate the replacement of the blade head 91, in this embodiment, the puncture short connector 9 also includes a blade fixing base 93 that is configured in a one-to-one correspondence with the blade head 91. The structure of the blade fixing base 93 is adapted to the structure of the blade head 91. The two blade heads 91 are detachably connected to the two blade fixing bases 93. Specifically, each of the two blade fixing bases 93 has a blade fixing groove 94 that is adapted to the structure of the blade head 91. The two blade heads 91 are detachably connected to the corresponding side blade fixing base 93 by inserting into the corresponding side blade fixing groove 94. Meanwhile, to ensure that the cover plate 3 can close securely on the base plate 2, both blade fixing bases 93 and the shorting body 92 are embedded in the bottom surface of the cover plate 3. The shorting body 92 connects the two blade heads 91 together by connecting with the two blade fixing bases 93. To ensure that the piercing shorting part 9 can smoothly short-circuit the two current wires 8 together, the two blade fixing bases 93 are also made of a metal material with good conductivity. To ensure the connection strength between the shorting body 92 and the two blade fixing bases 93, the two blade fixing bases 93 and the shorting body 92 are integrally formed, which provides better structural strength and maintains good conductivity. With this design, when the blade head 91 is damaged, the detachable connection allows the operator to easily remove the blade head 91 from the blade fixing base 93 for replacement.

[0036] To further ensure the reliability of the detachable connection between the blade head 91 and the blade fixing base 93, each of the two blade fixing bases 93 is provided with a screw fixing hole 95, and each of the two blade heads 91 is provided with a fixing block 97 through which the blade fixing screw 96 passes. When the two blade heads 91 are detachably connected to the corresponding side blade fixing base 93, the two blade fixing screws 96 are threaded into the screw fixing hole 95 on the corresponding side, so as to effectively prevent the two blade heads 91 from falling off the corresponding side blade fixing base 93.

[0037] To further ensure that the cover plate 3 can close well on the base plate 2, each groove 6 is provided with a clearance notch 11 to avoid the corresponding position of the blade head 91. The clearance notch 11 on the cover plate 3 can provide the necessary installation space for the blade head 91. The clearance notch 11 on the base plate 2 can ensure that the blade head 91 does not interfere with the base plate 2 when it moves downward with the cover plate 3. This allows the blade head 91 to more effectively break the insulation sheath 10 on the current wire 8 and ensures the stability of the blade head 91 during piercing.

[0038] To facilitate the use of this shorting tool, in this embodiment, a strong magnetic sheet 16 is also provided on the bottom surface of the base plate 2. The strong magnetic sheet 16 allows the operator to fix the shorting tool on the plane of the external device with the help of the strong magnetic sheet 16.

[0039] To improve the safety of this shorting tool, in this embodiment, both the base plate 2 and the cover plate 3 can be made of transparent high-molecular polycarbonate material with a thickness greater than 12mm, so as to have good insulation performance, thereby avoiding problems such as leakage of current in the cover plate 3 and the base plate 2, thus improving the safety of this shorting tool.

[0040] In this embodiment, both wires shorted by the direct-pass energy meter are connected to the energy meter. One wire is a live wire connected to the power supply side, and the other is connected to the load side. When the blade head 91 of the piercing short-circuit part 9 contacts the conductors inside the two wires, the blade head 91, the blade fixing base 93, and the short-circuit body 92 act as conductors, allowing the power supply to be directly transmitted to the load side, thus avoiding power outages when replacing the direct-pass energy meter. The two wires shorted by the energy meter via the current transformer are at the lower end of the test junction box, i.e., the current transformer side wires. When the blade head 91 contacts the two current transformer wires, a short circuit is formed, ensuring the normal operation of the current secondary circuit and avoiding power outages when replacing the test junction box. After short-circuiting the current secondary circuit, the upper and lower wires of the voltage secondary circuit are respectively inserted into the voltage connection part 5 for fixation. This allows the four wires on the test junction box to be fixed and insulated separately, thus avoiding confusion in the phase sequence and type of the wires and solving the problem of voltage wire insulation.

[0041] It should be emphasized that, since the insulation sheath 10 of the current conductor 8 in this embodiment can be pierced by the blade tip 91, after replacing the direct-pass energy meter or testing the junction box, it is necessary to wrap the damaged part of the current conductor 8 with insulating tape to prevent leakage, short circuit and other situations from occurring in the current conductor 8.

[0042] In specific operation, the operator first fixes the base plate 2 to the external device plane with the help of the strong magnetic sheet 16. Then, the two current wires 8 are placed in the grooves 6 on both sides of the base plate 2. Next, the operator puts on the cover plate 3, passes the fixing bolts 14 through the fixing ears 13 on both sides, and tightens the nuts of the fixing ears 13 onto the fixing bolts 14. At this time, the cover plate 3 is closed on the base plate 2 and presses against the base plate 2, which can drive the piercing shorting part 9 to move along the avoidance notch 11. During this process, the blade head 91 can pass through the cover plate 3, which drives the shorting body 92 and... When the blade fixing base 93 moves, the blade head 91 can pierce the insulation sheath 10 of the current conductor 8. When the blade head 91 contacts the conductor of the current conductor 8, the current flows between the two conductors through the piercing short-circuit part 9. Then, the operator tightens the current conductor fixing screw 12 to fix the current conductor 8. The operator can then disassemble the direct-pass energy meter or test junction box. During the disassembly of the test junction box, the two voltage conductors of the test junction box need to be fixed through the voltage connection part 5 to avoid confusion.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

[0044] Unless otherwise stated, if any of the technical solutions disclosed in this invention specify a numerical range, then the disclosed numerical range is a preferred numerical range. Those skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values ​​where the technical effect is more obvious or representative. Because there are many numerical values, it is impossible to list them all. Therefore, this invention discloses only some numerical values ​​to illustrate the technical solutions of this invention. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this invention.

[0045] In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in this invention to indicate positional relationships or shapes include shapes or states that are similar to, close to, or approximate with those shapes or states.

[0046] Any component provided by this invention can be assembled from multiple individual components, or it can be a single component manufactured using a one-piece molding process.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A short-circuit tool for replacing test junction boxes or direct-pass energy meters without power interruption, characterized in that: The box includes a housing (1), which includes a base plate (2) and a cover plate (3) disposed above the base plate (2). One end of the base plate (2) and the cover plate (3) are hinged together by a hinge (4) to enable opening and closing. The top surface of the cover plate (3) is provided with a voltage connection part (5) for fixing the voltage secondary circuit wire of the voltage transformer connected to the energy meter. The bottom surface of the cover plate (3) and the top surface of the base plate (2) are provided with symmetrically arranged grooves (6). After the cover plate (3) is closed on the base plate (2), the corresponding side grooves are recessed. The slots (6) are assembled together to form a conductor slot (7) for passing through the current conductor (8). The bottom surface of the cover plate (3) is also provided with a piercing short-circuit part (9). The piercing short-circuit part (9) includes a blade head (91) that is arranged one-to-one with the conductor slot (7) and a short-circuit body (92) for connecting the two blade heads (91) together. When the cover plate (3) is closed on the bottom plate (2), the two blade heads (91) can break through the insulation sheath (10) of the current conductor (8) in the corresponding conductor slot (7) to contact the conductor.

2. The short-circuit tool for replacing test junction boxes or direct-pass energy meters without power interruption as described in claim 1, characterized in that: The blade head (91) has an I-shaped or U-shaped structure.

3. The short-circuit tool for replacing test junction boxes or direct-pass energy meters without power interruption as described in claim 2, characterized in that: The puncture shorting part (9) also includes a blade fixing base (93) that is one-to-one with the blade head (91). The structure of the blade fixing base (93) is adapted to the structure of the blade head (91). Both sides of the blade fixing base (93) and the shorting body (92) are embedded in the bottom surface of the cover plate (3). The shorting body (92) connects the two sides of the blade head (91) together by connecting with the two sides of the blade fixing base (93). Both sides of the blade fixing base (93) are provided with blade fixing grooves (94) adapted to the structure of the blade head (91). Both sides of the blade head (91) are detachably connected to the corresponding side blade fixing base (93) by inserting into the corresponding side blade fixing groove (94).

4. The short-circuit tool for replacing test junction boxes or direct-pass energy meters without power interruption as described in claim 3, characterized in that: Both sides of the blade fixing base (93) are provided with screw fixing holes (95), and both sides of the blade head (91) are provided with fixing blocks (97) through which blade fixing screws (96) are inserted. When the blade heads (91) on both sides are detachably connected to the corresponding blade fixing base (93), the blade fixing screws (96) on both sides are threaded into the screw fixing holes (95) on the corresponding side.

5. The short-circuit tool for replacing test junction boxes or direct-pass energy meters without power interruption as described in claim 1, characterized in that: The voltage connection part (5) includes a connection block (51). Both ends of the connection block (51) are provided with wire access holes (52) that are not interconnected. The connection block (51) is also threaded with voltage line fixing screws (53) that are arranged in a one-to-one correspondence with the wire access holes (52). Both sides of the voltage line fixing screws (53) are movably inserted into the corresponding side wire access holes (52).

6. The short-circuit tool for replacing test junction boxes or direct-pass energy meters without power interruption as described in claim 1, characterized in that: Each groove (6) is provided with a clearance notch (11) for avoiding the corresponding blade head (91).

7. A short-circuit tool for replacing test junction boxes or direct-pass energy meters without power interruption, as described in claim 1, characterized in that: The top surface of the cover plate (3) is also threaded with current line fixing screws (12) that are corresponding to the positions of the wire groove (7). The current line fixing screws (12) on both sides are movably inserted into the corresponding side wire groove (7).

8. A short-circuit tool for replacing a test junction box or a direct-pass energy meter without power interruption, as described in claim 7, characterized in that: The current line fixing screws (12) on the same side are arranged symmetrically on the top surface of the cover plate (3) with the center line of the corresponding blade head (91) as the symmetrical line.

9. A short-circuit tool for replacing test junction boxes or direct-pass energy meters without power interruption, as described in claim 1, characterized in that: The bottom plate (2) and the cover plate (3) are both provided with fixing ears (13) at the other end. After the cover plate (3) is closed on the bottom plate (2), fixing bolts (14) can pass through the fixing ears (13) on both sides and fixing nuts (15) are locked into the fixing bolts (14) to fix them together.

10. A short-circuit tool for replacing a test junction box or a direct-pass energy meter without power interruption, as described in claim 1, characterized in that: A strong magnetic sheet (16) is also provided on the bottom surface of the base plate (2).

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