Electric energy meter case with uncovering power-off protection function

Abstract

The utility model discloses an electric energy meter case with an uncovering power-off protection function, which belongs to the technical field of electric energy meters, and comprises a meter case main body, a lower cover, a power connection block, a conducting strip, a power connection slide block and a disconnection assembly, the meter case main body is a hollow shell with an opening at the lower part, the lower cover is arranged at the opening at the lower part of the meter case main body, the power connection block is arranged inside the meter case main body, and the conducting strip is arranged on the lower part of the meter case main body. A containing groove is formed in the front side wall of the power connection block, the conducting strip is arranged in the containing groove, the upper end of the conducting strip penetrates out of the containing groove, the power connection sliding block is connected into the containing groove in a sliding mode, two threaded connection holes are formed in the front side wall of the power connection sliding block, the power connection sliding block is electrically connected with the conducting strip, and the disconnection assembly is arranged between the meter shell body and the lower cover. The problem of potential safety hazards caused by the fact that the internal wiring terminal is still electrified after the electric energy meter shell is uncovered in the prior art is solved. According to the utility model, the disconnection assembly and the limiting assembly are arranged, so that the electric shock risk of operators is avoided, and the safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric energy meter, concretely relates to an electric energy meter shell with uncapping power-off protection function. BACKGROUND

[0002] Electric energy meter, also known as electric energy meter, is used to measure electric energy meter, is the core equipment of electric energy metering and settlement in power system. Its working principle is mainly through the measurement of voltage and current, calculates the power, and accumulates with time, finally shows the consumed electric energy with " kilowatt hour" as the unit. Modern electric energy meter has been widely used in power generation, power supply and each link of power consumption, is the basis of intelligent power grid and energy management.

[0003] In the installation, maintenance or repair process of electric energy meter, the operating personnel often need to open the electric energy meter shell to connect the wiring terminal inside it with the zero line and the live line. However, in the existing technology, when the lower cover of the meter shell is opened, its inside often still maintains electrical connection with the household bus, and is always in the live state. This brings the risk of electric shock to the operating personnel, and there is a great safety hazard. Moreover, the live operation is also easy to cause short circuit due to tool misoperation, produce electric spark, damage equipment and even cause fire.

[0004] Therefore, how to provide an electric energy meter shell with uncapping power-off protection function to solve the defects existing in the prior art is a technical problem to be solved by the technical personnel in the field. CONTENT OF THE UTILITY MODEL

[0005] Therefore, the utility model provides an electric energy meter shell with uncapping power-off protection function to solve the problem of safety hazard caused by the live internal wiring terminal of the electric energy meter shell after uncapping in the prior art.

[0006] In order to realize the above purpose, the utility model provides the following technical scheme:

[0007] The utility model discloses an electric energy meter shell with uncapping power-off protection function, which comprises:

[0008] The shell body is a hollow shell with an open lower part.

[0009] The lower cover is installed at the open lower part of the shell body.

[0010] The power connection block is arranged inside the shell body, and a containing groove is formed in the front side wall of the power connection block.

[0011] The conductive sheet is arranged inside the containing groove, and the upper end of the conductive sheet penetrates out of the containing groove.

[0012] An electricity connection sliding block is slidably connected in the accommodating groove, two threaded connection holes are formed in the front side wall of the electricity connection sliding block, and the electricity connection sliding block is electrically connected with the conductive sheet.

[0013] A disconnection assembly is arranged between the watch case main body and the lower cover, and the disconnection assembly can release the electrical connection between the electricity connection sliding block and the conductive sheet when the lower cover is removed.

[0014] Further, two electricity connection holes are formed in the rear side wall of the electricity connection sliding block, the electricity connection holes are electrically connected with the threaded connection holes, two conductive contacts are arranged on the front side wall of the conductive sheet, and the conductive contacts can be inserted in the electricity connection holes.

[0015] Further, a guide groove is formed in the inner side wall of the accommodating groove, and a guide block is arranged on the inner side wall of the electricity connection sliding block, and the electricity connection sliding block is slidably connected in the accommodating groove through the guide groove.

[0016] Further, the disconnection assembly comprises:

[0017] A through groove is formed in the top wall of the accommodating groove.

[0018] A rotating shaft is rotatably connected in the interior of the watch case main body, and a driving wheel and a driven wheel are arranged on the circumferential side wall of the rotating shaft.

[0019] A first gear rack is arranged on the top wall of the electricity connection sliding block, and the first gear rack is meshingly connected with the driven wheel.

[0020] A driving rod is arranged on the inner side wall of the lower cover, a second gear rack is arranged on the top wall of the driving rod, and the second gear rack is meshingly connected with the driving wheel.

[0021] A limiting assembly is arranged in the interior of the watch case main body, and the limiting assembly is used for limiting the rotating shaft.

[0022] Further, the limiting assembly comprises:

[0023] A ratchet wheel is arranged on the circumferential side wall of the rotating shaft.

[0024] A ratchet is rotatably connected on the inner side wall of the watch case main body.

[0025] A tension spring is connected at one end to the inner side wall of the watch case main body, and the other end of the tension spring is connected to the side wall of the ratchet.

[0026] A sliding groove is formed in the outer side wall of the watch case main body.

[0027] A push rod is arranged on the side wall of the ratchet, the push rod penetrates through the sliding groove and can slide in the sliding groove.

[0028] Further, the lower cover is screwed with the watch case body by bolts.

[0029] The utility model has the advantages of the following:

[0030] The utility model discloses a disconnecting assembly and an electric contact sliding block are arranged, so that the electric connection in the electric contact sliding block can be automatically cut off when the lower cover is opened, and the risk of electric shock of the operator is fundamentally eliminated.

[0031] The utility model discloses a limiting assembly is arranged, can effectively prevent the accidental reverse rotation of the rotating shaft, ensures that the electric contact sliding block does not accidentally reset and re-energize due to vibration and other reasons in the cover opening maintenance state, and provides sustained safety locking.

[0032] The utility model discloses a guide groove and a guide block are arranged, ensure the stability and linearity of the electric contact sliding block when moving in the containing groove, prevent jamming or skew, make the energization and de-energization action more smooth, also ensure that the electric contact can be accurately and reliably inserted into the electric connection hole when the cover is closed and energized, ensure the stability of electric contact, and reduce the contact resistance. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other implementation drawings can be obtained according to the provided drawings without creating creative labor.

[0034] The structure, proportion, size and the like shown in the specification are only used to cooperate with the content disclosed in the specification, for understanding and reading by those skilled in the art, and are not used to limit the limiting conditions of the utility model that can be implemented, so they do not have the technical essence, any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose that the utility model can produce, should still fall within the scope of the technical content disclosed by the utility model.

[0035] Figure 1 The utility model provides a three-dimensional view of the electric energy meter shell with cover opening and de-energizing protection function;

[0036] Figure 2 The utility model provides a three-dimensional view of the internal structure of the watch case body;

[0037] Figure 3 The utility model provides a three-dimensional view of the electric contact block and the disconnecting assembly;

[0038] Figure 4 The utility model provides a cross-sectional view of the electric contact sliding block;

[0039] Figure 5 The internal structure perspective view of the accommodating groove provided by the utility model;

[0040] Figure 6 The power connection sliding block perspective view provided by the utility model;

[0041] Figure 7 The sectional view of the disconnecting assembly provided by the utility model;

[0042] Figure 8 The power connection sliding block perspective view provided by the utility model; Figure 3 The enlarged view of the A structure;

[0043] Figure 9 The limiting assembly perspective view provided by the utility model.

[0044] In the figure: 1 table shell main body; 2 lower cover; 3 power connection block; 4 accommodating groove; 41 guide groove; 5 conductive sheet; 51 conductive contact; 6 power connection sliding block; 61 threaded connection hole; 62 electricity connection hole; 63 guide block; 71 through slot; 72 rotating shaft; 73 driving wheel; 74 driven wheel; 75 first rack; 76 driving rod; 77 second rack; 78 limiting assembly; 781 ratchet wheel; 782 ratchet; 783 tension spring; 784 sliding groove; 785 lever. DETAILED DESCRIPTION

[0045] The following specific embodiments illustrate the embodiments of the utility model, and those skilled in the art can easily understand other advantages and effects of the utility model from the disclosed content of the specification. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0046] Please refer to Figures 1-9 , the utility model discloses the electricity meter shell with uncapping and power-off protection function, and the utility model has six parts, such as Figure 1 、 Figure 2 、 Figure 3As shown, including the watch case body 1, the lower cover 2, the electricity block 3, the conductive sheet 5, the electricity slip block 6 and the disconnecting assembly, the watch case body 1 is a hollow shell with an open lower part, the lower cover 2 is installed at the open lower part of the watch case body 1, the electricity block 3 is arranged inside the watch case body 1, the front side wall of the electricity block 3 is provided with a containing groove 4, the conductive sheet 5 is arranged inside the containing groove 4, the upper end of the conductive sheet 5 penetrates out of the containing groove 4, the electricity slip block 6 is slidably connected in the containing groove 4, the front side wall of the electricity slip block 6 is provided with two threaded connection holes 61, the electricity slip block 6 is electrically connected with the conductive sheet 5, and the disconnecting assembly is arranged between the watch case body 1 and the lower cover 2, when the lower cover 2 is removed, the disconnecting assembly can remove the electrical connection between the electricity slip block 6 and the conductive sheet 5.

[0047] In the embodiment, the electricity block 3 is a main wiring component in the electric energy meter, and has a similar function to the wiring terminal, and the zero line and the live line in the electric energy meter are electrically connected with other wire harnesses in the electricity block 3, so as to form electrical connection between the electrical bus and each branch line. The conductive sheet 5 is used to connect with the circuit board of the electric energy meter, the top of the conductive sheet 5 is provided with a threaded hole, a bolt is arranged in the threaded hole, and the circuit board of the electric energy meter is electrically connected with the conductive sheet 5 through a wire and the bolt. The number of the electricity slip block 6 can be adjusted according to actual conditions, and two are taken as an example in the embodiment.

[0048] The disconnecting assembly links the physical opening and closing action of the lower cover 2 with the electrical connection state between the electricity slip block 6 and the conductive sheet 5. When the lower cover 2 is opened for installation or maintenance, the disconnecting assembly automatically and forcibly removes the electrical connection between the electricity slip block 6 and the conductive sheet 5, thereby cutting off the electrical path between the electricity connection part and the electrical bus, which makes the operating personnel completely de-energized when connecting the wire harness, and fundamentally eliminates the possibility of electric shock accidents, thereby providing important life safety protection for the operating personnel.

[0049] Since the electricity slip block 6 is automatically de-energized in the open cover state, even if the tool slips or is accidentally touched when the operating personnel uses a screwdriver or other metal tool for wiring operation, the short circuit between the live line and the zero line will not occur, thereby avoiding the risk of generating intense electric sparks, burning equipment components and even causing fire. This not only protects the electric energy meter itself, but also maintains the safe and stable operation of other equipment in the entire line.

[0050] Preferably, the lower cover 2 is threadedly connected with the watch case body 1 through a bolt. The front side wall of the lower cover 2 is provided with a through hole for mounting the bolt, and the corresponding position of the watch case body 1 is provided with a threaded hole, so that the lower cover 2 and the watch case body 1 are threadedly connected through the bolt, thereby ensuring that the watch case body 1 cannot be easily opened when not in use.

[0051] As Figure 4As shown, two electric connection holes 62 are formed on the rear side wall of the electric connection slider 6, and the electric connection holes 62 are electrically connected with the threaded connection holes 61. Two electric contact points 51 are arranged on the front side wall of the electric conductor 5, and the electric contact points 51 can be inserted into the electric connection holes 62.

[0052] In the embodiment, the threaded connection holes 61 are the common connection structure in the prior art. The two electric contact points 51 correspond to the zero line and the live line respectively, and the threaded connection holes 61 also correspond to the zero line and the live line respectively. When the electric connection slider 6 slides out of the accommodating groove 4, the electric connection holes 62 are disconnected with the electric contact points 51, forming a disconnection in the physical layer, which is safer and more effective.

[0053] As shown in Figure 5 , Figure 6 , a guide groove 41 is formed on the inner side wall of the accommodating groove 4, and a guide block 63 is arranged on the inner side wall of the electric connection slider 6. The electric connection slider 6 is slidably connected in the accommodating groove 4 through the guide groove 41.

[0054] In the embodiment, the positions of the guide groove 41 and the guide block 63 are as shown in Figure 5 , Figure 6 . Through the sliding cooperation of the guide groove 41 and the guide block 63, the stability and linearity of the electric connection slider 6 when moving in the accommodating groove 4 are ensured, and the jamming or skew is prevented. This not only makes the power-on and power-off actions more smooth, but also ensures that the electric contact points 51 can be accurately and reliably inserted into the electric connection holes 62 when the cover is closed, ensuring the stability of the electric contact and reducing the contact resistance.

[0055] It is worth noting that the guide groove 41 also has a limiting effect, and the guide groove 41 can prevent the electric connection slider 6 from being pulled out of the accommodating groove 4. The length of the guide groove 41 should be set as follows: when the lower cover 2 is removed, the guide block 63 reaches the end of the guide groove 41.

[0056] As shown in Figure 3 , Figure 4 , Figure 6 , Figure 7 , the disconnection assembly includes a through groove 71, a rotating shaft 72, a first gear rack 75, a driving rod 76 and a limiting assembly 78. The through groove 71 is formed on the top wall of the accommodating groove 4. The rotating shaft 72 is rotatably connected inside the watch case main body 1. The rotating shaft 72 is provided with a driving wheel 73 and a driven wheel 74 on the circumferential side wall. The first gear rack 75 is arranged on the top wall of the electric connection slider 6, and the first gear rack 75 is in meshing connection with the driven wheel 74. The driving rod 76 is arranged on the inner side wall of the lower cover 2, and the top wall of the driving rod 76 is provided with a second gear rack 77, which is in meshing connection with the driving wheel 73. The limiting assembly 78 is arranged inside the watch case main body 1, and is used for limiting the rotating shaft 72.

[0057] In the embodiment, the shape and connection mode of the rotating shaft 72, the driving wheel 73, the driven wheel 74 and the driving rod 76 are as shown in Figure 3 、 Figure 7 . The driving wheel 73 and the driven wheel 74 are in the same axial position with the rotating shaft 72; the driven wheel 74 and the electricity-connection sliding block 6 are in one-to-one correspondence; the setting position of the through slot 71 is as shown in Figure 4 ; the driven wheel 74 passes through the through slot 71 into the accommodating groove 4 and is in meshing connection with the first rack 75.

[0058] In order to avoid the driving rod 76, a notch for avoiding is formed on the side wall of the electricity-connection block 3. It is worth noting that the notch can also guide the insertion position of the driving rod 76 so that the driving rod 76 can be in meshing connection with the driving wheel 73 when being inserted.

[0059] In use, the bolt is screwed and the lower cover 2 is opened, the driving rod 76 drives the driving wheel 73 to rotate, then the rotating shaft 72 drives the driven wheel 74 to rotate, then the driven wheel 74 drives the first rack 75 to drive the electricity-connection sliding block 6 to slide, so as to realize the disconnection and connection of the electrical connection between the electricity-connection sliding block 6 and the conductive sheet 5. This series of mechanical linkage structure is accurate in transmission and rapid in response, which ensures that the cover is opened and the power is disconnected.

[0060] As shown in Figure 8 、 Figure 9 , the limiting assembly 78 includes a ratchet wheel 781, a ratchet tooth 782, a tension spring 783, a sliding slot 784 and a push rod 785. The ratchet wheel 781 is arranged on the circumferential side wall of the rotating shaft 72, the ratchet tooth 782 is rotationally connected to the inner side wall of the watch body 1, one end of the tension spring 783 is connected to the inner side wall of the watch body 1, the other end of the tension spring 783 is connected to the side wall of the ratchet tooth 782, the sliding slot 784 is formed on the outer side wall of the watch body 1, and the push rod 785 is arranged on the side wall of the ratchet tooth 782 and passes through the sliding slot 784 and can slide in the sliding slot 784.

[0061] In the embodiment, the shape and setting position of the ratchet wheel 781, the ratchet tooth 782, the tension spring 783, the sliding slot 784 and the push rod 785 are as shown in Figure 8 、 Figure 9 . The limiting assembly 78 can realize one-way locking of the rotating shaft 72. When the lower cover 2 is opened, the driving rod 76 is pulled out, at this time the rotating shaft 72 can rotate; when the rotating shaft 72 is turned over, the ratchet wheel 781 and the ratchet tooth 782 are locked, so that the rotating shaft 72 cannot rotate, thereby fixing the position of the electricity-connection sliding block 6; this ensures that the electricity-connection sliding block 6 will not be accidentally reset and re-powered in the cover opening maintenance state.

[0062] In use, first, push the lever 785 along the groove 784 to slide, so that the ratchet 782 and the ratchet wheel 781 are disconnected; second, cover the lower cover 2, the driving rod 76 is engaged with the driving wheel 73 in the process of insertion, so that the rotating shaft 72 rotates, and then the driven wheel 74 drives the first rack 75 to drive the power slide 6 back to the inside of the containing groove 4; finally, screw the bolt to fix the lower cover 2.

[0063] By setting the limiting component 78, the accidental reverse rotation of the rotating shaft 72 can be effectively prevented, so that the power slide 6 cannot be accidentally reset and re-powered due to vibration and the like in the cover opening maintenance state, and continuous safety locking is provided.

[0064] Although the utility model has been described in detail above with general description and specific embodiments, some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the utility model belong to the scope of protection required by the utility model.

Claims

1. An electric energy meter case having an open cover power-off protection function, characterized by, The utility model provides a watch case, which comprises a watch case body (1) which is a hollow case with an open lower part; a lower cover (2) which is installed at the open lower part of the watch case body (1); an electricity connection block (3) which is arranged inside the watch case body (1), and a receiving groove (4) is formed in the front side wall of the electricity connection block (3); a conductive sheet (5) which is arranged inside the receiving groove (4), and the upper end of the conductive sheet (5) penetrates through the receiving groove (4); an electricity connection sliding block (6) which is slidingly connected in the receiving groove (4), and two threaded connection holes (61) are formed in the front side wall of the electricity connection sliding block (6), the electricity connection sliding block (6) is electrically connected with the conductive sheet (5); and a disconnection assembly which is arranged between the watch case body (1) and the lower cover (2), and when the lower cover (2) is removed, the disconnection assembly can disconnect the electricity connection between the electricity connection sliding block (6) and the conductive sheet (5). Two electricity connection holes (62) are formed in the rear side wall of the electricity connection sliding block (6), the electricity connection holes (62) are electrically connected with the threaded connection holes (61), two conductive contact points (51) are arranged on the front side wall of the conductive sheet (5), and the conductive contact points (51) can be inserted into the electricity connection holes (62). A guide groove (41) is formed in the inner side wall of the receiving groove (4), a guide block (63) is arranged on the inner side wall of the electricity connection sliding block (6), and the electricity connection sliding block (6) is slidingly connected in the receiving groove (4) through the guide groove (41). The disconnection assembly comprises a through groove (71) which is formed in the top wall of the receiving groove (4); a rotating shaft (72) which is rotatably connected inside the watch case body (1), and a driving wheel (73) and a driven wheel (74) are arranged on the circumferential side wall of the rotating shaft (72); a first rack (75) which is arranged on the top wall of the electricity connection sliding block (6), and the first rack (75) is in meshing connection with the driven wheel (74); a driving rod (76) which is arranged on the inner side wall of the lower cover (2), and a second rack (77) is arranged on the top wall of the driving rod (76), and the second rack (77) is in meshing connection with the driving wheel (73); and a limiting assembly (78) which is arranged inside the watch case body (1), and the limiting assembly (78) is used for limiting the rotating shaft (72). The limiting assembly (78) comprises a ratchet wheel (781) which is arranged on the circumferential side wall of the rotating shaft (72); a ratchet (782) which is rotatably connected to the inner side wall of the watch case body (1); a tension spring (783) which is connected to the inner side wall of the watch case body (1) at one end, and the other end of the tension spring (783) is connected to the side wall of the ratchet (782); a sliding groove (784) which is formed in the outer side wall of the watch case body (1); and a lever (785) which is arranged on the side wall of the ratchet (782), penetrates through the sliding groove (784) and can slide in the sliding groove (784). The lower cover (2) is in threaded connection with the watch case body (1) through bolts. ​ 2. The electric energy meter case with the uncovert opening and power-off protection function according to claim 1, characterized in that, ​ 3. The electric energy meter case having an unco vered protection function according to claim 1, wherein, ​ 4. The electric energy meter case having a cover opening and power off protection function according to claim 1, characterized in that, ​ ​ ​ ​ ​ ​ 5. The electric energy meter case having a cover opening and power off protection function according to claim 4, characterized in that, ​ ​ ​ ​ ​ ​ 6. The electric energy meter case having a cover opening and power off protection function according to claim 1, characterized in that, ​

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