End cover and circuit short circuit method

Abstract

The invention belongs to the technical field of power grid electric energy metering, and discloses an end cover and a circuit short-circuit method.The end cover is connected with a junction box base, the junction box base is provided with three current wiring modules, each current wiring module is provided with two sets of junction box current wiring terminals and a set of junction box current connecting pieces, and the end cover comprises a shell and a current pressing plate; the number of the current pressing plates is three, each current pressing plate comprises a conductive panel and two conduction assemblies, the two conduction assemblies are arranged on the conductive panel in a spaced mode and electrically connected with the conductive panel, and the two conduction assemblies of each current pressing plate are electrically connected with the two sets of junction box current wiring terminals of the corresponding current wiring module in a one-to-one correspondence mode. A current loop is formed. When the junction box base has a fault that a current short circuit cannot be realized, the end cover can be used for replacing the junction box cover plate, and the two conduction assemblies are electrically connected with the two groups of junction box current wiring terminals of the corresponding faulted current wiring module in a one-to-one correspondence manner, so that the short circuit of a current loop is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid electric energy metering, and in particular to an end cover and a circuit short-circuiting method. Background Art

[0002] At present, power supply companies generally use a metering junction box as the electrical connection device for connecting the secondary line and the metering equipment in three-phase metering devices. This device can replace the electric energy metering device without interrupting the power supply of the primary side line by disconnecting the voltage connector and short-circuiting the current connector, which greatly facilitates the maintenance of the metering device.

[0003] However, due to the influence of the use environment, the metering joint junction box has a current continuity failure, which makes it impossible to short-circuit the current loop when replacing the metering device. As a result, the metering device cannot be operated and maintained without power outage. Considering the safety of the power supply company's operations and the continuity of users' electricity use, it is difficult to cut off power to the electricity user.

[0004] Therefore, there is an urgent need for an end cap and a circuit short-circuiting method to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an end cover and a circuit short-circuiting method to solve the problem in the prior art that a current connection failure occurs in the junction box, resulting in the inability to short-circuit the current loop when replacing the terminal, and further resulting in the inability to perform terminal operation and maintenance without power outage.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The end cover is connected to the junction box base. The junction box base is provided with three current wiring modules. Each current wiring module is provided with two sets of junction box current wiring terminals and one set of junction box current connecting pieces, including:

[0008] The shell is connected to the base of the junction box;

[0009] There are three current pressure plates, each corresponding to the three current wiring modules. The three current pressure plates are spaced apart in the housing. Each current pressure plate includes a conductive panel and two conductive components. The two conductive components are spaced apart in the conductive panel and are electrically connected to the conductive panel.

[0010] The two conducting components of each current pressure plate are electrically connected to the two groups of current wiring terminals of the corresponding current wiring module in a one-to-one correspondence to form a current loop.

[0011] Preferably, the conducting assembly includes a plurality of conducting members, and at least one conducting member in each conducting assembly is electrically connected to the corresponding current terminal of the junction box.

[0012] Preferably, the two groups of conducting components of the current pressure plate are spaced apart at both ends of the conductive panel along the length direction of the conductive panel; or, the two groups of conducting components of the current pressure plate are spaced apart along the width direction of the conductive panel.

[0013] Preferably, the conductive panel of the current pressure plate is provided with a plurality of first positioning holes, which correspond one-to-one to a plurality of conductive parts. The conductive parts include connecting rods passing through the corresponding first positioning holes, which can rotate and move in a direction perpendicular to the conductive panel.

[0014] Preferably, a rotating part is provided at one end of the connecting rod, and a docking part is connected to the other end. When the rotating part rotates, the docking part can be driven to rotate through the connecting rod. The current terminal of the junction box is provided with a groove, and the end of the docking part away from the connecting rod is provided with a protrusion corresponding to the groove, and the protrusion can be placed in the groove.

[0015] Preferably, the conductive assembly also includes a positioning nut and an elastic member. The positioning nut is connected to the side of the conductive panel away from the rotating part. The outer wall of the connecting rod is provided with a thread matching the positioning nut. The connecting rod is threadedly connected to the positioning nut. One end of the elastic member abuts the positioning nut, and the other end abuts the docking part. The docking part can move relative to the connecting rod in the axial direction of the connecting rod, and the connecting rod is passed through the elastic member.

[0016] Preferably, an elastic limiting groove is provided at one end of the docking portion close to the connecting rod, and an end of the elastic member away from the positioning nut is located in the elastic limiting groove.

[0017] Preferably, the end cover includes four voltage flip covers, and the four voltage flip covers and three current pressure plates are alternately arranged on the shell along the length direction of the shell.

[0018] Preferably, the current pressure plate further includes an insulating panel, the conductive panel is connected to the insulating panel, and the insulating panel is connected to the shell.

[0019] A circuit short-circuiting method is applied to the above-mentioned end cover, wherein the junction box base is located in the circuit connected to the terminal and is located between the terminal and the power supply. The circuit short-circuiting method includes the following steps:

[0020] S1. Connect the housing to the junction box base;

[0021] S2, electrically connecting each conductive component of the three current pressure plates to the corresponding current terminal of the junction box, and checking whether the current of the terminal is less than the preset current value; if so, executing step S3; if not, executing step S2;

[0022] S3. Replace the terminal;

[0023] S4. After the terminal is replaced, the electrical connection between each conductive component and the corresponding current terminal of the junction box is released.

[0024] Beneficial effects of the present invention:

[0025] The present invention discloses an end cover and a circuit short-circuiting method. The end cover is connected to a junction box base. The junction box base is provided with three junction modules. Each junction module is provided with two groups of junction box current wiring terminals and a group of junction box current connecting pieces. The end cover comprises: a shell and a current pressure plate. The shell is connected to the combined junction box base. Three current pressure plates are provided. The three current pressure plates correspond one-to-one to the three current wiring modules. The three current pressure plates are arranged at intervals in the shell. Each current pressure plate comprises a conductive panel and two conduction components. The two conduction components are arranged at intervals in the conductive panel and are electrically connected to the conductive panel. The two conduction components of each current pressure plate are electrically connected one-to-one to the two groups of junction box current wiring terminals of the corresponding current wiring module to form a current loop. When there is a fault in the junction box base that prevents current short-circuiting, the junction box cover can be replaced with the above-mentioned end cover, and two conductive components are electrically connected one-to-one with the two groups of junction box current wiring terminals of the corresponding current wiring module to form a current loop. Under the premise of ensuring safe operation, the current loop of the junction box base is short-circuited, which effectively solves the problem that the current continuity failure of the junction box causes the current loop to be unable to be short-circuited when the terminal is replaced, and then causes the terminal operation and maintenance to be unable to be carried out without power outage. There is no need to cut off the power to the power user, thereby ensuring the power continuity and safety of the power user. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of the end cover and junction box base provided in the first embodiment of the present invention;

[0027] Figure 2 This is a schematic structural diagram of the end cover provided in the first embodiment of the present invention;

[0028] Figure 3 is a structural diagram of a conductive component provided in Embodiment 1 of the present invention;

[0029] Figure 4 It is a structural schematic diagram of the junction box base provided in Example 1 of the present invention.

[0030] In the picture:

[0031] 1. End cap; 11. Housing; 111. Fixing hole; 112. First mounting hole; 12. Current pressure plate; 121. Conducting assembly; 1211. Conducting member; 12111. Connecting rod; 12112. Rotating portion; 12113. Docking portion; 121131. Elastic limiting groove; 12114. Positioning nut; 12115. Elastic member; 122. Conductive panel; 1221. First positioning hole; 1222. Second mounting hole; 123. Insulation panel; 1231, second positioning hole; 1232, third mounting hole; 13, voltage flap; 2, junction box base; 21, current wiring module; 211, junction box current wiring terminal; 2111, junction box first current wiring terminal; 2112, junction box second current wiring terminal; 2113, junction box third current wiring terminal; 212, junction box current connecting piece; 22, voltage wiring module; 23, connection hole; 3, fixing screw. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0033] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0034] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0036] Example 1

[0037] This embodiment discloses an end cover connected to the base of the junction box, which solves the problem that a current continuity failure of the junction box causes the current loop to be unable to be short-circuited when replacing the terminal, and thus causes the terminal to be unable to be operated and maintained without power outage. There is no need to cut off the power to the power user, thereby ensuring the power continuity and safety of the power user.

[0038] like Figures 1-4 As shown, in this embodiment, the junction box (not shown) includes a junction box base 2 and a junction box cover (not shown). The end cover 1 is connected to the junction box base 2. The junction box base 2 is provided with three current wiring modules 21. Each current wiring module 21 is provided with two junction box current wiring terminals 211 and a set of junction box current connecting pieces 212. The end cover 1 includes a housing 11 and a current pressure plate 12. The housing 11 is connected to the combined junction box base 2. There are three current pressure plates 12. The three current pressure plates 12 correspond one-to-one to the three current wiring modules 21. The three current pressure plates 12 are arranged at intervals on the housing 11. Each current pressure plate 12 includes a conductive panel 122 and two conductive components 121. The two conductive components 121 are arranged at intervals on the conductive panel 122 and are electrically connected to the conductive panel 122. The two conductive components 121 of each current pressure plate 12 are electrically connected one-to-one to the two sets of junction box current wiring terminals 211 of the corresponding current wiring module 21 to form a current loop. It is understandable that when the junction box base 2 has a fault that prevents the current from being short-circuited, the junction box cover plate can be replaced with the above-mentioned end cap 1, and two conductive components 121 are electrically connected to the two sets of junction box current connection terminals 211 of the corresponding current connection module 21 in a one-to-one manner to form a current loop. Under the premise of ensuring safe operation, the junction box current loop is short-circuited, effectively solving the problem that the current connection piece 212 of the junction box fails and the current loop cannot be short-circuited when the terminal is replaced, which in turn causes the terminal to be unable to be operated without power outages. There is no need to cut off the power to the power user, thereby ensuring the continuity and safety of the power supply to the power user. For example, the junction box current connection terminal 211 can be a flat head screw or other conductive member, which is not specifically limited in this embodiment.

[0039] Furthermore, if Figure 2As shown, the conductive component 121 includes multiple conductive members 1211, and at least one conductive member 1211 in each conductive component 121 is electrically connected to the corresponding junction box current terminal 211. It can be understood that as long as at least one conductive member 1211 in each conductive component 121 is electrically connected to the corresponding junction box current terminal 211, it is possible to achieve conductivity between the two groups of junction box current terminals 211 and the conductive panel 122, thereby forming a current loop, achieving short-circuiting of the junction box current loop, and improving the success rate of forming the current loop, that is, improving the effectiveness and reliability of forming the circuit loop short-circuit. Specifically, the number of conductive members 1211 can be 4, 6, 8, etc. In this embodiment, the conductive component 121 includes 6 conductive members 1211.

[0040] In this embodiment, the junction box is used in a three-phase circuit. The junction box base 2 has an input end and an output end. Each set of junction box current connectors includes two junction box current connectors. A junction box current connector failure refers to a failure of the junction box current connector connected to the junction box current terminal 211 at the input end, such as failure to close normally, and inability to achieve normal conduction of the current connection module. The specific connection method of the junction box current connector is a prior art in this field and will not be described in detail in this embodiment. For example, Figure 4 As shown, each set of junction box current terminals 211 of the junction box base 2 includes a first junction box current terminal 2111, a second junction box current terminal 2112, and a third junction box current terminal 2113. In each set of junction box current terminals 211, two junction box current terminals 211 are electrically connected to the wires. Each junction box current terminal 211 includes two contact points. When the conductive member 1211 is electrically connected to one of the contact points, the conductive member 1211 can be electrically connected to the junction box current terminal 211. In this embodiment, at the input end of the junction box base 2, the second junction box current terminal 2112 and the third junction box current terminal 2113 are electrically connected to the wires; at the output end of the junction box base 2, the first junction box current terminal 2111 and the third junction box current terminal 2113 are electrically connected to the wires, which is equivalent to each set of junction box current terminals 211 having four conductive terminals (not shown in the figure). As for the wiring method of the junction box, it is a prior art and will not be described in detail in this embodiment.

[0041] Further, if Figure 2As shown, the two groups of conducting components 121 of the current pressure plate 12 are spaced apart and arranged at both ends of the conductive panel 122 along the length direction of the conductive panel 122 . It can be understood that the two groups of conductive components 121 are spaced apart at both ends of the conductive panel 122 in its length direction, and the conductive components 121 at both ends are respectively electrically connected to the two groups of junction box current terminals 211, and the two groups of junction box current terminals 211 are the input end and the output end of the circuit respectively. Specifically, as long as at least one of the six conductive components 1211 at the input end is electrically connected to the corresponding third current terminal 2113 of the junction box, and at least one of the six conductive components 1211 at the output end is electrically connected to the corresponding first current terminal 2111 of the junction box, a current loop can be formed; or, as long as at least one of the six conductive components 1211 at the input end is electrically connected to the corresponding second current terminal 2112 of the junction box, and at least one of the six conductive components 1211 at the output end is electrically connected to the corresponding third current terminal 2113 of the junction box, a current loop can be formed. Both of the above connection methods can achieve short-circuiting of the current loop.

[0042] Furthermore, at the access end of the junction box base 2, when at least two conductive members 1211 in the conductive assembly 121 corresponding to the junction box current terminal 211 are electrically connected to the junction box current terminal 211, a current loop can also be formed. It can be understood that the conductive assembly 121 is electrically connected to the conductive panel 122. When at least two conductive members 1211 in the conductive assembly 121 corresponding to the junction box current terminal 211 at the access end of the junction box base 2 are electrically connected to the junction box current terminal 211, the two conductive members 1211 are electrically connected to the two junction box current terminals 211, and the two conductive members 1211 are electrically connected through the conductive panel 122, thus forming a complete current loop, further improving the effectiveness and reliability of forming a circuit loop short circuit. Exemplarily, two conducting members 1211 in the conducting assembly 121 corresponding to the junction box current terminal 211 at the access end of the junction box base 2 are electrically connected to the conductive terminals in the second junction box current terminal 2112 and the third junction box current terminal 2113 respectively.

[0043] Further optionally, at the outlet end of the junction box base 2, when at least two conductive members 1211 in the conductive assembly 121 corresponding to the junction box current terminal 211 are electrically connected to the junction box current terminal 211, a current loop can also be formed. It is understandable that the conductive assembly 121 is electrically connected to the conductive panel 122. When at least two conductive members 1211 in the conductive assembly 121 corresponding to the junction box current terminal 211 at the outlet end of the junction box base 2 are electrically connected to the junction box current terminal 211, the two conductive members 1211 are electrically connected to the two junction box current terminals 211, and the two conductive members 1211 are electrically connected via the conductive panel 122, thus forming a complete current loop, further improving the effectiveness and reliability of forming a circuit loop short circuit. Exemplarily, two conducting members 1211 in the conducting assembly 121 corresponding to the junction box current terminal 211 at the outlet end of the junction box base 2 are electrically connected to the conductive terminals in the first junction box current terminal 2111 and the third junction box current terminal 2113 respectively.

[0044] Of course, in other embodiments, the two groups of conductive components 121 of the current pressure plate 12 may also be spaced apart along the width direction of the conductive panel 122. Specifically, the two groups of conductive components 121 are spaced apart along the width direction of the conductive panel 122 at one end of the access end of the junction box base 2 where the junction box current wiring terminals 211 are located. It can be understood that at least one conductive member 1211 in each conductive component 121 is electrically connected to the corresponding junction box current wiring terminal 211. At the access end of the junction box base 2, each conductive component 121 has a conductive member 1211 that is electrically connected to two junction box current wiring terminals 211, respectively. The two conductive members 1211, the conductive panel 122, and the two junction box current wiring terminals 211 form a current loop, thereby short-circuiting the current loop in the junction box base 2. Illustratively, at the access end of the junction box base 2 , one conductive member 1211 is electrically connected to a conductive terminal in the second current terminal 2112 of the junction box, and another conductive member 1211 is electrically connected to a conductive terminal in the third current terminal 2113 of the junction box.

[0045] Further, if Figure 3As shown, the conductive panel 122 of the current pressure plate 12 is provided with a plurality of first positioning holes 1221. The plurality of first positioning holes 1221 correspond one-to-one to the plurality of conductive members 1211. The conductive members 1211 include connecting rods 12111 that pass through the corresponding first positioning holes 1221. The connecting rods 12111 are capable of self-rotation and movement in a direction perpendicular to the conductive panel 122. It is understood that by providing the plurality of first positioning holes 1221 on the conductive panel 122 to limit the plurality of conductive members 1211, and the connecting rods 12111 are capable of self-rotation and movement in a direction perpendicular to the conductive panel 122, it is convenient to electrically connect and disconnect the conductive members 1211 with the corresponding terminal blocks, which is convenient for operators to use.

[0046] Further, if Figure 3 As shown, one end of the connecting rod 12111 is provided with a rotating portion 12112, and the other end is connected to a docking portion 12113. The rotating portion 12112 rotates, which can drive the docking portion 12113 to rotate through the connecting rod 12111. The junction box current terminal 211 is provided with a groove (not shown in the figure), and the end of the docking portion 12113 away from the connecting rod 12111 is provided with a protrusion (not shown in the figure) corresponding to the groove, which can be placed in the groove. It can be understood that by providing the groove on the junction box current terminal 211 and the protrusion corresponding to the groove on the docking portion 12113, when the docking portion 12113 is electrically connected to the junction box current terminal 211, the protrusion can be placed in the groove, thereby ensuring that the docking portion 12113 and the junction box current terminal 211 have a larger contact area, improving the stability of the electrical connection between the docking portion 12113 and the junction box current terminal 211, and making the formed current loop stable. Exemplarily, the groove is a cross-shaped groove, and the protrusion is a cross-shaped protrusion with a shape matching therewith, and the cross-shaped protrusion can be located in the cross-shaped groove. Of course, in other embodiments, the groove and the protrusion can also be other shapes, which can be determined according to specific use requirements.

[0047] Further, if Figure 3 As shown, the conductive assembly 121 further includes a positioning nut 12114 and an elastic member 12115. The positioning nut 12114 is connected to the side of the conductive panel 122 away from the rotating portion 12112. The outer peripheral wall of the connecting rod 12111 is provided with a thread matching the positioning nut 12114. The connecting rod 12111 is threadedly connected to the positioning nut 12114. One end of the elastic member 12115 abuts the positioning nut 12114, and the other end abuts the docking portion 12113. The docking portion 12113 can move relative to the connecting rod 12111 in the axial direction of the connecting rod 12111. The connecting rod 12111 is inserted through the elastic member 12115. The elastic member 12115 always has a tendency to drive the docking portion 12113 to move away from the rotating portion 12112.

[0048] It can be understood that by providing the positioning nut 12114 and the elastic member 12115, the connecting rod 12111 is screwed to the positioning nut 12114, and by driving the rotating portion 12112 to rotate, the connecting rod 12111 can be rotated and move along the axial direction of the positioning nut 12114, thereby driving the docking portion 12113 to move in a direction perpendicular to the conductive panel 122, thereby improving the stability of the movement of the docking portion 12113, and one end of the elastic member 12115 abuts against the positioning nut 12114, and the other end abuts against the docking portion 12113 to limit the elastic member 12115, and the elastic member 12115 always has a tendency to drive the docking portion 12113 to move away from the rotating portion 12112, that is, the elastic member 1211 The conductive member 12113 is always in a compressed state. When the docking portion 12113 abuts the corresponding junction box current terminal 211, the elastic member 12115 is compressed, exerting a reaction force on the docking portion 12113 toward the junction box current terminal 211, so that the docking portion 12113 stably abuts the junction box current terminal 211, further improving the stability of the electrical connection between the conductive member 1211 and the junction box current terminal 211. At the same time, when the docking portion 12113 is driven to rotate, the docking portion 12113 can move relative to the connecting rod 12111 in the axial direction of the connecting rod 12111, facilitating the protrusion on the docking portion 12113 to enter or exit the groove on the junction box current terminal 211, making the operation more labor-saving. Exemplarily, the elastic member 12115 is a spring, one end of which is connected to the positioning nut 12114 by welding at the end of the positioning nut 12114 away from the conductive panel 122, and the other end abuts against the end of the docking portion 12113 away from the protrusion. At the same time, the positioning nut 12114 can be connected to the side of the conductive panel 122 away from the rotating portion 12112 by welding, and the first positioning hole 1221 is coaxial.

[0049] Furthermore, if Figure 3 As shown, an elastic limiting groove 121131 is provided at one end of the docking portion 12113 close to the connecting rod 12111, and an end of the elastic member 12115 away from the positioning nut 12114 is located in the elastic limiting groove 121131. It can be understood that by providing the elastic limiting groove 121131, the end of the elastic member 12115 away from the positioning nut 12114 is located in the elastic limiting groove 121131, and the connecting rod 12111 is inserted into the elastic member 12115. The connecting rod 12111, the limiting groove and the positioning nut 12114 work together to limit the elastic member 12115, thereby improving the stability of the movement of the elastic member 12115, preventing the elastic member 12115 from falling or being misplaced, and ensuring the normal use of the conductive member 1211, with high reliability.

[0050] In some optional embodiments, the docking portion 12113 is axially movably connected to the connecting rod 12111, that is, the docking portion 12113 can move relative to the connecting rod 12111 in the axial direction of the connecting rod 12111, but when the connecting rod 12111 rotates, it will also drive the docking portion 12113 to rotate. Exemplarily, a cross structure is provided at one end of the connecting rod 12111 facing the docking portion 12113, and a cross groove is provided at the bottom of the elastic limiting groove 121131. The cross structure is movably inserted into the cross groove (not shown in the figure) to achieve relative movement between the connecting rod 12111 and the docking portion 12113.

[0051] In this embodiment, in order to prevent the connecting rod 12111 from separating from the docking portion 12113, the docking portion 12113 is further provided with a limiting hole, which is located on the side of the cross groove away from the elastic limiting groove 121131 and is connected to the cross groove. The end of the connecting rod 12111 having the cross structure is provided with a circular limiting block (not shown) extending in a direction perpendicular to the axis of the connecting rod 12111. The circular limiting block is slidably placed in the limiting hole along the axis of the connecting rod 12111, and the radial dimension of the circular limiting block is larger than the radial dimension of the cross groove, so that the circular limiting block does not enter the cross groove, but only slides in the limiting hole. Through the cooperation of the circular limiting block and the limiting hole, the connecting rod 12111 and the docking portion 12113 can be prevented from separating, and the circular limiting block can slide in the limiting hole, thus not affecting the movement of the docking portion 12113 relative to the connecting rod 12111 on the axis of the connecting rod 12111.

[0052] Furthermore, if Figure 1 and Figure 4 As shown, the end cover 1 includes four voltage flaps 13, and the four voltage flaps 13 and the three current pressure plates 12 are alternately arranged on the shell 11 along the length direction of the shell 11. It can be understood that by providing four voltage flaps 13, corresponding to the four voltage wiring modules 22 of the junction box base 2, when the conductive component 121 is electrically connected to the junction box current wiring terminal 211, the voltage wiring module 22 is shielded to ensure that there is no accidental contact during operation that causes a short circuit in the voltage wiring module 22 or an electric shock to personnel, thereby further improving the safety of the end cover 1. Exemplarily, the voltage flap 13 is rotatably connected to the shell 11. Specifically, rotation holes can be provided on the voltage flap 13 and the shell 11 respectively, and the rotating member is simultaneously inserted into each rotation hole on the voltage flap 13 and the shell 11, thereby realizing the rotation connection between the voltage flap 13 and the shell 11. Furthermore, the voltage flip cover 13 has a closed state and an open state. When the voltage flip cover 13 is in the closed state, the voltage flip cover 13 blocks the voltage wiring module 22 ; when the voltage flip cover 13 is in the open state, the voltage flip cover 13 no longer blocks the voltage wiring module 22 .

[0053] Furthermore, if Figure 3 As shown, the current pressure plate 12 also includes an insulating panel 123, to which the conductive panel 122 is connected, and the insulating panel 123 is connected to the housing 11. Specifically, the insulating panel 123 is provided with second positioning holes 1231 corresponding one-to-one with the plurality of first positioning holes 1221. The axes of the first positioning holes 1221 and the second positioning holes 1231 coincide, and the connecting rod 12111 is simultaneously inserted through the first positioning holes 1221 and the second positioning holes 1231. It can be understood that the provision of the insulating panel 123 is used to secure the conductive panel 122 to the housing 11 in an insulated manner, further improving safety. Exemplarily, the material of the insulating panel 123 can be plastic, transparent glass or other insulating materials. When the material of the insulating panel 123 is transparent glass, it is convenient to observe the contact between the conductive member 1211 and the current terminal 211 of the junction box, so that the operator can observe whether the connection is in place. In addition, the insulating panel 123 can be fixed to the shell 11 by bonding or setting fixings, and the conductive panel 122 can be connected to the insulating panel 123 by bonding, setting fixings or embedding.

[0054] For example, in this embodiment, Figure 2 As shown, a plurality of first mounting holes 112 are provided on the shell 11, a plurality of second mounting holes 1222 are provided on the conductive panel 122, and a plurality of third mounting holes 1232 are provided on the insulating panel 123. The plurality of first mounting holes 112 correspond one-to-one to the plurality of second mounting holes 1222, and one-to-one to the plurality of third mounting holes 1232. Fasteners such as screws or wires can be used to fix the conductive panel 122 and the insulating panel 123 to the shell 11.

[0055] In order to ensure the connection stability of the end cap 1. Figure 1 As shown, two fixing holes 111 corresponding to the connection holes 23 on the junction box base 2 are arranged at intervals on the shell 11, and the end cover 1 also includes two fixing screws 3. When the shell 11 is docked with the junction box base 2, the shell 11 and the junction box base 2 can be fixedly connected by the fixing screws 3. The two fixing screws 3 are respectively inserted into the corresponding fixing holes 111 and the connection holes 23.

[0056] In this embodiment, the working process of using the end cover 1 is: first, the end cover 1 is docked with the junction box base 2, and the housing 11 and the junction box base 2 are fixed with the fixing screws 3, and then the voltage flip cover 13 is closed to block the voltage wiring module 22, and then each conductive component 121 of the three current pressure plates 12 is electrically connected to the corresponding junction box current terminal 211 to achieve short-circuiting of the current loop, and then the terminal is replaced. After the terminal replacement is completed, the electrical connection between each conductive component 121 and the corresponding junction box current terminal 211 is released, and the end cover 1 is removed.

[0057] Example 2

[0058] This embodiment discloses a circuit short-circuiting method, which is applied to the end cover 1 disclosed in Example 1. The junction box base 2 is located in the circuit connected to the terminal and is located between the terminal and the power supply. It solves the problem that the current circuit cannot be short-circuited when the terminal is replaced due to a failure of the junction box current connector 212, which in turn causes the terminal to be unable to be operated and maintained without power outages. There is no need to cut off the power to the power user, thereby ensuring the power continuity and safety of the power user.

[0059] In this embodiment, the circuit shorting method includes the following steps:

[0060] S1, docking the housing 11 with the junction box base 2;

[0061] S2, electrically connecting each conductive component 121 of the three current pressure plates 12 to the corresponding current terminal 211 of the junction box, and checking whether the current of the terminal is less than the preset current value; if so, executing step S3; if not, executing step S2;

[0062] S3. Replace the terminal;

[0063] S4. After the terminal is replaced, the electrical connection between each conductive component 121 and the corresponding junction box current terminal 211 is released.

[0064] For example, in this embodiment, the terminal is an electric energy meter. Of course, in other embodiments, the terminal may also be other electricity-related devices, which can be determined based on usage requirements and are not specifically limited.

[0065] Taking the terminal as an electric energy meter as an example, it can be understood that by setting the above steps, when the current connector 212 of the junction box fails and the current loop cannot be short-circuited when the electric energy meter is replaced, and thus the operation and maintenance of the electric energy meter cannot be carried out without power outage, the shell 11 is docked with the junction box base 2 through the above steps, and the end cover 1 is fixed on the junction box base 2, so that each conductive component 121 of the three current pressure plates 12 is electrically connected to the corresponding junction box current terminal 211 to achieve short-circuiting of the circuit, and thus the replacement of the electric energy meter is achieved without power outage. After the replacement of the electric energy meter is completed, the electrical connection between each conductive component 121 and the corresponding junction box current terminal 211 is released, so that the replaced electric energy meter is in a connected state with the circuit.

[0066] Furthermore, step S1 includes:

[0067] S11, releasing the connection between the junction box cover and the junction box base 2;

[0068] S12 , docking the housing 11 with the junction box base 2 .

[0069] It is understandable that by setting this step, the connection between the junction box cover and the junction box base 2 is released, so that the housing 11 and the junction box base 2 can be docked, that is, the end cover 1 can be installed on the junction box base 2.

[0070] Furthermore, step S2 includes:

[0071] S21, closing the voltage flip cover 13, and covering the voltage flip cover 13 of the end cover 1 on the voltage connection module 22;

[0072] S22, electrically connecting each conductive component 121 of the three current pressure plates 12 to the corresponding current terminal 211 of the junction box, and checking whether the current of the electric energy meter is less than the preset current value; if so, executing step S23; if not, executing step S22;

[0073] S23, open the voltage flip cover 13, unfasten the voltage connecting piece in the voltage connection module 22 downward to disconnect the voltage loop, then close the voltage flip cover 13 and check whether the upper voltage of the electric energy meter is less than the preset value. If so, execute step S3; if not, execute step S23;

[0074] It is understandable that by setting the above steps, it is ensured that there is no accidental touch during operation that causes short circuit of the voltage connection module 22 or electric shock to personnel, and at the same time, the voltage circuit is normally disconnected, further improving the safety of the end cover 1.

[0075] Furthermore, before step S3, the method further includes: checking whether the connection of the electric energy meter is correct to ensure that the connection of the electric energy meter is correct.

[0076] Furthermore, step S4 includes:

[0077] S41, open the voltage flip cover 13 in sequence, close the voltage connecting piece in the voltage connection module 22, and close the voltage flip cover 13; check whether the voltage of the electric energy meter is greater than the preset voltage value; if so, execute step S42; if not, check whether the electric energy meter connection is correct and execute step S41;

[0078] S42 , disconnecting each conductive component 121 from the corresponding junction box current terminal 211 , disconnecting the housing 11 from the junction box base 2 , removing the end cover 1 , and connecting the junction box cover to the junction box base 2 .

[0079] It can be understood that through the above steps, when the current connector 212 of the junction box fails and the current loop cannot be short-circuited when replacing the electricity meter, the current loop can be short-circuited without replacing the junction box or stopping power, so as to replace the electricity meter. It is easy to use and has high safety.

[0080] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. An end cover connected to a junction box base (2), wherein the junction box base (2) is provided with three current wiring modules (21), each of the current wiring modules (21) is provided with two groups of junction box current wiring terminals (211) and one group of junction box current connecting pieces (212), characterized in that: include: A housing (11) is connected to the junction box base (2); A current pressure plate (12), wherein three current pressure plates (12) are provided, the three current pressure plates (12) correspond to the three current wiring modules (21) one by one, the three current pressure plates (12) are arranged at intervals on the housing (11), each current pressure plate (12) comprises a conductive panel (122) and two conducting components (121), the two conducting components (121) are arranged at intervals on the conductive panel (122), and are both electrically connected to the conductive panel (122); The two conducting components (121) of each current pressure plate (12) are electrically connected to the two groups of junction box current connection terminals (211) of the corresponding current connection module (21) in a one-to-one correspondence to form a current loop.

2. The end cap according to claim 1, characterized in that: The conducting component (121) comprises a plurality of conducting members (1211), and at least one conducting member (1211) in each conducting component (121) is electrically connected to a corresponding current connection terminal (211) of the junction box.

3. The end cap according to claim 2, characterized in that: The two groups of the conducting components (121) of the current pressure plate (12) are arranged at intervals at both ends of the conductive panel (122) along the length direction of the conductive panel (122); or, the two groups of the conducting components (121) of the current pressure plate (12) are arranged at intervals along the width direction of the conductive panel (122).

4. The end cap according to claim 2, characterized in that: The conductive panel (122) of the current pressure plate (12) is provided with a plurality of first positioning holes (1221), the plurality of first positioning holes (1221) correspond one-to-one to the plurality of conductive members (1211), the conductive members (1211) include connecting rods (12111) passing through the corresponding first positioning holes (1221), and the connecting rods (12111) are capable of self-rotation and movement in a direction perpendicular to the conductive panel (122).

5. The end cap according to claim 4, characterized in that: One end of the connecting rod (12111) is provided with a rotating part (12112), and the other end is connected to a docking part (12113); the rotating part (12112) rotates, and can drive the docking part (12113) to rotate through the connecting rod (12111); the junction box current terminal (211) is provided with a groove; one end of the docking part (12113) away from the connecting rod (12111) is provided with a protrusion corresponding to the groove, and the protrusion can be placed in the groove.

6. The end cap according to claim 5, characterized in that: The conducting component (121) further comprises a positioning nut (12114) and an elastic member (12115), wherein the positioning nut (12114) is connected to a side of the conductive panel (122) away from the rotating portion (12112), the outer peripheral wall surface of the connecting rod (12111) is provided with a thread matching the positioning nut (12114), the connecting rod (12111) is threadedly connected to the positioning nut (12114), one end of the elastic member (12115 is in contact with the positioning nut (12114), and the other end is in contact with the docking portion (12113), the docking portion (12113) can move relative to the connecting rod (12111) in the axial direction of the connecting rod (12111), and the connecting rod (12111) is passed through the elastic member (12115).

7. The end cap according to claim 6, characterized in that: An elastic limiting groove (121131) is provided at one end of the docking portion (12113) close to the connecting rod (12111), and one end of the elastic member (12115) away from the positioning nut (12114) is located in the elastic limiting groove (121131).

8. The end cap according to any one of claims 1 to 7, characterized in that: The end cover comprises four voltage flaps (13), and the four voltage flaps (13) and the three current pressure plates (12) are alternately arranged on the shell (11) along the length direction of the shell (11).

9. The end cap according to any one of claims 1 to 7, characterized in that: The current pressure plate (12) further comprises an insulating panel (123), the conductive panel (122) is connected to the insulating panel (123), and the insulating panel (123) is connected to the housing (11).

10. A circuit short-circuiting method, applied to the end cover according to any one of claims 1 to 9, wherein the junction box base (2) is located in the circuit of the connection terminal and between the terminal and the power supply, characterized in that: The circuit short-circuiting method comprises the following steps: S1, docking the housing (11) with the junction box base (2); S2, electrically connecting each of the conducting components (121) of the three current pressure plates (12) to the corresponding current connection terminal (211) of the junction box, and checking whether the current of the terminal is less than a preset current value; if so, executing step S3; if not, executing step S2; S3, replace the terminal; S4, after the terminal is replaced, the electrical connection between each of the conducting components (121) and the corresponding current connection terminal (211) of the junction box is released.

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