An integrated DC energy meter

Abstract

The present invention discloses an integrated DC electric energy meter, comprising an upper meter shell, a lower meter shell, a shunt base, a lead-sealed cover, a lower circuit board, an upper circuit board and a shunt. The shunt is installed in the shunt base, and the shunt base cooperates with the lower meter shell to fix the shunt. After the lower circuit board is installed in the lower meter shell, the tripping path between the shunt base and the lower meter shell is locked. Only after the lower circuit board is removed can the shunt base and the lower meter shell be tripped and separated. The shunt pins are electrically connected to the lower circuit board by welding. After the upper circuit board and the upper meter shell are installed and the lead-sealed screws are installed and sealed, the meter part and the shunt are completely fixed and in a lead-sealed state, and no additional lead-sealed shunt is required. After the lead-sealed cover is installed, the integrated DC electric energy meter is in a fully enclosed state, with extremely high operational safety. The shunt base has a heat dissipation channel, and sufficient creepage distance is left from the outside to the shunt, ensuring heat dissipation while taking into account electrical safety.

Description

Technical Field

[0001] The present invention relates to the technical field of direct current (DC) electric energy meters, and in particular to an integrated DC electric energy meter. Background Art

[0002] DC charging piles require DC energy meters for energy measurement. Shunts are often used to collect electrical signals. The traditional approach is to install the shunt separately in the copper busbar and then connect it to the DC energy meter with a connecting wire. Since charging piles are usually small in size, wiring is difficult, and the DC energy meter needs to be installed separately, which takes up extra space and is not conducive to the miniaturization of charging piles. Another approach is to connect the DC energy meter and the shunt as a whole and install them together in the copper busbar. This method is small in size and does not require connecting signal lines. However, since the shunt is directly connected to the copper busbar, the DC energy meter is directly connected to the shunt, and the shunt is exposed outside the DC energy meter, there are safety hazards in operating the DC energy meter. In addition, the shunt, as part of the DC energy meter, requires additional lead sealing measures. Summary of the Invention

[0003] The present invention aims to solve the problems and shortcomings of the prior art and provides an integrated direct current electric energy meter.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The present invention provides an integrated DC electric energy meter, which is characterized in that it includes an upper meter shell, a lower meter shell, a shunt base, a lead seal cover, a lower circuit board, an upper circuit board and a shunt;

[0006] An electronic lead seal is provided at the bottom right side of the upper shell of the instrument, a display window and a wiring port are respectively provided at the lower and upper surface parts of the upper shell of the instrument, an N-phase screw slot is provided at the bottom of the upper shell of the instrument, and buckle slots are provided on both sides of the upper shell of the instrument;

[0007] A diverter bottom support for supporting the bottom of the diverter is fixed at the middle position of the bottom inner portion of the diverter base along the length direction, and positioning columns are fixed to the upper and lower parts of the diverter bottom support respectively. The top of each positioning column is provided with a first outer buckle on the outer side and a first inner buckle on the inner side, and buckle holes are provided on the left and right inner walls of the diverter base;

[0008] The diverter is provided with a plurality of signal sampling needles, and the diverter is provided with positioning holes corresponding to the positioning posts on both sides of the signal sampling needles;

[0009] A strong and weak electrical isolation wall is provided on the upper part of the inner bottom of the lower shell of the instrument. Front buckles corresponding to the buckle grooves are respectively provided on the front sides of the left and right side walls of the lower shell of the instrument, and rear buckles corresponding to the buckle holes are respectively provided on the rear sides of the left and right side walls. A positioning column hole corresponding to the positioning column and a shunt pinhole corresponding to the signal sampling needle are provided in the lower shell of the instrument. An N-end wire pressing frame groove is provided on the lower inner wall of the lower shell of the instrument, and a second inner buckle corresponding to the first outer buckle is provided on the upper and lower inner walls of the lower shell of the instrument;

[0010] An electronic seal column is provided inside the seal housing;

[0011] The bottom of the lower circuit board is provided with an N terminal, the lower circuit board is provided with a signal sampling welding hole corresponding to the signal sampling pin and a strong and weak current isolation groove corresponding to the strong and weak current isolation wall, and the upper and lower ends of the lower circuit board are respectively provided with a second outer buckle corresponding to the first inner buckle;

[0012] The bottom of the upper circuit board is provided with an electronic seal button, and the lower part and the upper part of the upper circuit board are respectively provided with a display element corresponding to the display window and a functional terminal corresponding to the wiring port;

[0013] The shunt is installed in the shunt base, each of the positioning holes is inserted into the corresponding positioning column, the lower shell of the instrument is installed in the shunt base, each of the positioning column holes is inserted into the corresponding positioning column, each of the shunt pinholes is inserted into the corresponding signal sampling needle, each of the second inner buckle is overlapped with the corresponding first outer buckle, each of the rear buckle is overlapped with the corresponding buckle hole, the lower circuit board is installed in the lower shell of the instrument, each of the signal sampling welding hole is inserted into the corresponding signal sampling needle and welded and fixed, the strong and weak current isolation slot is inserted into the corresponding strong and weak current isolation wall, the The N terminal is installed in the corresponding N terminal wire frame groove, each of the second outer buckles is overlapped with the corresponding first inner buckle, the upper circuit board is installed in the lower shell of the instrument, the upper shell of the instrument is docked and fixed with the lower shell of the instrument, the electronic seal button corresponds to the electronic seal opening, the display window corresponds to the display element, the wiring port corresponds to the functional terminal, the wiring screw of the N terminal is placed in the N phase screw slot, the buckle slot is overlapped with the corresponding front buckle, the seal cover is docked with the diverter base and fixed to the upper shell of the instrument, and the electronic seal column is in a pressing state on the electronic seal button.

[0014] Preferably, a rail-mounted accessory mounting hole is provided on the back of the diverter base, and the rail-mounted accessory is mounted on the diverter base by screwing screws through the rail-mounted accessory and the rail-mounted accessory mounting hole and then screwing and fixing.

[0015] Preferably, circuit board supports for supporting the lower circuit board are fixed at four corner positions of the inner bottom of the instrument lower shell.

[0016] Preferably, a first lead seal nut portion is provided on the top right side and the bottom left side of the upper shell of the instrument, and a first lead seal screw groove is provided on the top right side and the bottom left side of the surface of the lead seal cover, and the first lead seal screw is passed through the first lead seal screw groove and screwed to the first lead seal nut portion.

[0017] Preferably, a second lead seal screw groove is provided at the right bottom of the upper shell of the instrument, and a second lead seal nut portion is provided at the right bottom of the lower shell of the instrument. The second lead seal screw groove is located below the electronic lead seal opening, and the second lead seal screw and the lead seal buckle are installed in the second lead seal screw groove. The second lead seal screw is screwed to the second lead seal nut portion through the second lead seal screw groove.

[0018] Preferably, wiring holes are provided on the left and right side walls of the lead seal cover, a first wiring buckle is provided on the left top of the upper shell of the instrument, and a second wiring buckle is provided on the bottom of the lower shell of the instrument and behind the second lead seal nut.

[0019] Preferably, first heat dissipation holes are provided on the upper and lower walls of the diverter base, and second heat dissipation holes are provided on the left and right walls of the diverter base.

[0020] Preferably, the upper and lower ends of the bottom support of the diverter are respectively provided with nut grooves for installing nuts, the two positioning columns are located between the two nut grooves, the upper and lower ends of the diverter are respectively provided with screw holes corresponding to the nut grooves, and two combination screws are respectively passed through the corresponding screw holes and screwed to the nuts for fixing.

[0021] Preferably, two housing limit supports are fixed to the left and right inner walls of the diverter base, and the bottom of the instrument lower shell is placed on the four housing limit supports.

[0022] Preferably, a diverter support is fixed to the outer edge of the bottom of the lower shell of the instrument, and after being installed in place, the diverter support contacts the surface of the diverter.

[0023] On the basis of conforming to the common sense in this field, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0024] The positive progress effect of the present invention is:

[0025] The present invention provides an integrated DC electric energy meter, wherein a shunt is installed in a shunt base, and the shunt base cooperates with a lower shell of the meter to fix the shunt. After the lower circuit board is installed in the lower shell of the meter, the tripping path of the shunt base and the lower shell of the meter is locked. The shunt base and the lower shell of the meter can only be tripped and separated after the lower circuit board is removed. The shunt pins are electrically connected to the lower circuit board by welding. After the upper circuit board and the upper shell of the meter are installed and the lead sealing screws are installed and sealed, the meter part and the shunt are completely fixed and in a lead-sealed state, and no additional lead-sealed shunt is required. After the lead-sealed cover is installed, the integrated DC electric energy meter is in a fully enclosed state, with extremely high operational safety. The shunt base has a heat dissipation channel, and sufficient creepage distance is left from the outside to the shunt, thereby ensuring heat dissipation while taking into account electrical safety. The position where the lower shell of the meter contacts the shunt is an overhead structure, and sufficient heat dissipation space is reserved to prevent the heat generated by the shunt from affecting the internal components of the meter and thus affecting the performance of the meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of an embodiment of the present invention;

[0027] Figure 2 (a)-(b) is a schematic diagram of the instrument upper shell;

[0028] Figure 3 This is a schematic diagram of the lower shell of the instrument;

[0029] Figure 4 (a)-(b) is a schematic diagram of the diverter base;

[0030] Figure 5 (a)-(b) is a schematic diagram of the lead seal cover;

[0031] Figure 6 The following is a schematic diagram of the circuit board;

[0032] Figure 7 This is a schematic diagram of the upper circuit board;

[0033] Figure 8 is a schematic diagram of the diverter;

[0034] Figures 9(a)-(n) are schematic diagrams of the assembly process of the present invention;

[0035] Figure 10 It is a front view of the present invention;

[0036] Figure 11 for Figure 10 Middle AA section view;

[0037] Figure 12 for Figure 11 The enlarged view of area a in the middle shows the schematic diagram of the working mechanism of the diverter base and the lower shell of the instrument;

[0038] Figure 13 for Figure 10The middle BB cross-section shows the schematic diagram of longitudinal heat dissipation at the diverter base;

[0039] Figure 14(a)-(b) shows Figure 10 The CC cross-sectional view in the middle shows the schematic diagram of the lateral heat dissipation of the shunt base and the schematic diagram of the creepage distance. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0041] like Figure 1 As shown, this embodiment provides an integrated DC electric energy meter, which includes an upper meter shell 1, a lower meter shell 2, a shunt base 3, a lead seal cover 4, a lower circuit board 5, an upper circuit board 6, a shunt 8 and a rail-mounted accessory 12.

[0042] As shown in Figure 2(a)-(b), a lead seal screw slot 1a and an electronic lead seal opening 1b are provided at the bottom right side of the upper shell 1 of the instrument, and the electronic lead seal opening 1b is located above the lead seal screw slot 1a. A lead seal nut portion 1c is provided at the top right side and the bottom left side of the upper shell 1 of the instrument. A display window 1d and a wiring port 1e are respectively provided at the lower and upper parts of the surface of the upper shell 1 of the instrument. A wiring buckle 1f is provided at the top left side of the upper shell 1 of the instrument, an N-phase screw slot 1h is provided at the bottom of the upper shell 1 of the instrument, and buckle slots 1i are provided on both sides of the upper shell 1 of the instrument.

[0043] As shown in Figure 4(a)-(b), a diverter bottom support 3d for supporting the bottom of the diverter 8 is fixed along the length direction at the middle position of the bottom inner portion of the diverter base 3, and a nut groove 3e for installing the nut 7 is respectively provided at the upper and lower ends of the diverter bottom support 3d. Positioning columns 3a are respectively fixed at the upper and lower parts of the diverter bottom support 3d, and the two positioning columns 3a are located between the two nut grooves 3e. The top of each positioning column 3a is provided with a first outer buckle 3b on the relative outer side and a first inner buckle 3c on the relative inner side. The left and right inner walls of the diverter base 3 are provided with buckle holes 3i and two shell limit supports 3f are fixed thereto. Heat dissipation holes 3g are provided on the upper and lower walls of the diverter base 3, and heat dissipation holes 3h are provided on the left and right walls of the diverter base 3. The back of the diverter base 3 is provided with a rail-mounted accessory mounting hole 3k.

[0044] like Figure 8As shown, the diverter 8 is provided with multiple signal sampling needles 8b, and positioning holes 8a corresponding to the positioning columns 3a are opened on both sides of the diverter 8 and the signal sampling needles 8b, and screw holes 8c corresponding to the nut slots 3e are respectively opened at the upper and lower ends of the diverter 8.

[0045] like Figure 3 As shown, a lead seal nut portion 2a is provided at the bottom right of the instrument lower shell 2, a strong and weak current isolation wall 2b is provided at the upper part of the inner bottom of the instrument lower shell 2, front buckles 2c corresponding to the buckle groove 1i are provided on the front sides of the left and right side walls of the instrument lower shell 2, and rear buckles 2d corresponding to the buckle holes 3i are provided on the rear sides of the left and right side walls. A positioning column hole 2g corresponding to the positioning column 3a and a shunt pinhole 2e corresponding to the signal sampling needle 8b are provided in the instrument lower shell 2, an N-end wire pressing frame groove 2f is provided on the lower inner wall of the instrument lower shell 2, and a second inner buckle 2h corresponding to the first outer buckle 3b is provided on the upper and lower inner walls of the instrument lower shell 2, a shunt support 2i is fixed to the outer edge of the bottom (i.e., the back) of the instrument lower shell 2, a wiring buckle 2j is provided at the bottom of the instrument lower shell 2 and behind the lead seal nut portion 2a, and a circuit board support for supporting the lower circuit board 5 is fixed at the four corners of the inner bottom of the instrument lower shell 2.

[0046] As shown in Figure 5 (a)-(b), a seal screw groove 4a is provided on the top right side and the bottom left side of the seal cover 4, a wiring hole 4b is opened on the left and right side walls of the seal cover 4, and an electronic seal column 4c is provided inside the seal cover 4.

[0047] like Figure 6 As shown, an N terminal 5a is provided at the bottom of the lower circuit board 5, a signal sampling welding hole 5b corresponding to the signal sampling pin 8b and a strong and weak current isolation groove 5c corresponding to the strong and weak current isolation wall 2b are provided on the lower circuit board 5, and a second outer buckle 5d corresponding to the first inner buckle 3c is provided at the upper and lower ends of the lower circuit board 5 respectively.

[0048] like Figure 7 As shown, an electronic seal button 6a is provided at the bottom of the upper circuit board 6, and a display element 6b corresponding to the display window 1d and a functional terminal 6c corresponding to the connection port 1e are respectively provided at the lower and upper parts of the upper circuit board 6.

[0049] 9(a)-(n) are schematic diagrams of the assembly process of the present invention. In the first step, the nut 7 is installed into the nut groove 3e of the diverter base 3 according to FIG9(a); in the second step, the diverter 8 is installed according to FIG9(b), and the diverter 8 is installed in the diverter base 3, and each positioning hole 8a is inserted into the corresponding positioning column 3a, and the diverter bottom support 3d supports the bottom of the diverter 8; in the third step, the instrument lower shell 2 is installed according to FIG9(c), and the instrument lower shell 2 is installed in the diverter base 3, and each positioning column hole 2g is inserted into the corresponding positioning column 3a, and each diverter pinhole 2e is inserted into the corresponding signal sampling needle 8b. The bottom of the instrument lower shell 2 is placed on the four shell limit supports 3f. After installation, the diverter support 2i contacts the surface of the diverter 8, and each second inner buckle 2h overlaps with the corresponding first outer buckle 3b, and each rear buckle 2d is connected with The corresponding buckle holes 3i are overlapped, and the shunt 8 is completely fixed at this time. To remove the shunt 8, the second inner buckle 2h and the first outer buckle 3b, the rear buckle 2d and the buckle hole 3i need to be disengaged at the same time; the fourth step is to install the lower circuit board 5 according to Figure 9 (d), the lower circuit board 5 is installed in the lower shell 2 of the instrument, the strong and weak current isolation groove 5c is inserted into the corresponding strong and weak current isolation wall 2b, each signal sampling welding hole 5b is inserted into the corresponding signal sampling needle 8b and welded fixed, the N terminal 5a is installed into the corresponding N end wire frame groove 2f, and each second outer buckle 5d is overlapped with the corresponding first inner buckle 3c. The installed lower circuit board 5 blocks the disengagement path of the first outer buckle 3b of the shunt base 3 and the second inner buckle 2h of the lower shell 2 of the instrument. If the lower circuit board 5 is not removed, the coordination and fixation of the shunt base 3 and the lower shell 2 of the instrument cannot be released (see the principle for details). Figure 129 (e) and the upper circuit board 6 is installed in the lower shell 2 of the instrument; the sixth step is to install the upper shell 1 of the instrument according to FIG9 (f), and the upper shell 1 of the instrument is fixed to the lower shell 2 of the instrument. The electronic seal button 6a corresponds to the electronic seal port 1b, the display window 1d corresponds to the display element 6b of the upper circuit board 6, the wiring port 1e corresponds to the functional terminal 6c of the upper circuit board 6, the N phase screw slot 1h corresponds to the wiring screw of the N terminal 5a of the lower circuit board 5, and the wiring screw of the N terminal 5a is placed in the N phase screw slot 1h. The buckle slot 1i overlaps with the corresponding front buckle 2c. The seal screw slot 1a of the upper shell 1 of the instrument corresponds to the seal nut portion 2a of the lower shell 2 of the instrument; the seventh step is to install the seal screw 10 and the seal buckle 11 to the seal screw slot 1a of the upper shell 1 of the instrument, and the seal screw 10 is screwed to the seal nut portion 2a of the lower shell 2 of the instrument through the seal screw slot 1a. It is completely fixed with the installed parts, and no installed part can be removed without damaging the lead seal buckle 11; in the eighth step, according to Figure 9 (h), two combination screws 9 are respectively passed through the corresponding screw holes 8c of the diverter 8 and screwed together with the nuts 7 installed in the nut groove 3e of the diverter base 3; in the ninth step, according to Figure 9 (i), the lead seal cover 4 is installed, the lead seal cover 4 is docked with the diverter base 3 and fixed to the instrument upper shell 1, and the lead seal screw 10 is passed through the lead seal screw groove 4a and screwed together with the lead seal nut part 1c. After the installation is completed, the electronic lead seal column 4c is in a pressed state against the electronic lead seal button 6a. The factory installation steps are completed, and the state is shown in Figure 9 (j). If a guide rail installation method is required, install the rail-mounted accessory 12 according to Figure 9 (k). Use screws 13 to pass through the rail-mounted accessory 12 and the rail-mounted accessory installation hole 3k and then screw them together to install the rail-mounted accessory 12 on the diverter base 3. The installation is completed as shown in Figure 9 (l).

[0050] When installing the external copper busbar 101, it is necessary to first withdraw the assembly screw 9 in step Figure 9(h). The assembly screw 9 is simultaneously passed through the diverter 8 and the external copper busbar 101 and screwed to the nut 7 for fixation. Then the lead seal housing 4 and the lead seal screw 10 are installed. Finally, the lead seal buckle 11 is installed to the lead seal screw slot 4a of the lead seal housing 4 as shown in Figure 9(m). The final state is shown in Figure 9(n). In addition to the physical lead seal of the lead seal buckle 11, after the lead seal housing 4 is installed, the electronic lead seal column 4c is pressed against the electronic lead seal button 6a of the circuit board 6 to achieve electronic lead sealing. When wiring, the functional terminal 6c connection line is routed through the routing buckle 1f and then led out from the routing hole 4b of the lead seal housing 4 on the corresponding side. The N terminal 5a is routed through the routing buckle 2j and then led out from the routing hole 4b of the lead seal housing 4 on the corresponding side.

[0051] like Figure 10 It is the front view after the present invention has been installed. Figure 11 for Figure 10 Middle AA section view. Figure 12 for Figure 11The enlarged view of area a in the middle shows a schematic diagram of the working mechanism of the diverter base, diverter, lower circuit board and instrument lower shell. As shown in the figure, the second inner buckle 2h of the instrument lower shell 2 and the first outer buckle 3b of the diverter base 3 are fixed together, leaving an inward deformation margin d for the second outer buckle 5d of the lower circuit board 5 to be fixed together with the first inner buckle 3c of the diverter base 3, while the second outer buckle 5d of the lower circuit board 5 and the first inner buckle 3c of the diverter base 3 have no inward deformation margin, so that the second inner buckle 2h and the first outer buckle 3b of the instrument lower shell 2 cannot be deformed and disengaged. Without removing the circuit board 5, the fitting and fixing of the diverter base 3 and the instrument lower shell 2 cannot be released. The diverter 8 is positioned in four directions by the positioning column 3a of the diverter base 3, plus the diverter support 2i of the instrument lower shell 2 and the upper and bottom supports of the diverter bottom support 3d of the diverter base 3. The shunt 8 is completely fixed. It can be seen that if the shunt 8 needs to be removed, the lower shell 2 of the meter and the shunt base 3 need to be separated. To separate the lower shell 2 of the meter and the shunt base 3, the lower circuit board 5 needs to be removed. To remove the lower circuit board 5, the second outer buckle 5d needs to be disengaged from the first inner buckle 3c of the shunt base 3, and the signal sampling welding hole 5b of the lower circuit board 5 and the signal sampling needle 8b of the shunt 8 are welded and fixed. Before the welding is released, the second outer buckle 5d and the first inner buckle 3c of the shunt base 3 cannot be disengaged. The installed upper shell 1 and lower shell 2 of the integrated DC electric energy meter of the present invention are lead-sealed and cannot be removed. The signal sampling welding hole 5b of the lower circuit board 5 and the signal sampling needle 8b of the shunt 8 cannot be unsoldered. It can be concluded that all parts of the integrated DC electric energy meter of the present invention are in a lead-sealed state.

[0052] like Figure 13 As shown, the diverter support 2i of the instrument lower shell 2 forms a heat dissipation channel b1 on the upper part of the diverter 8, and the heat dissipation holes 3g distributed above and below the diverter base 3 form a straight heat dissipation channel b2 at the bottom of the diverter 8.

[0053] like Figure 14a As shown, the heat dissipation holes 3h distributed on the left and right sides of the diverter base 3 form a heat dissipation channel c at the bottom of the diverter 8. Since the left and right sides are not the copper bar entry and exit areas, electrical safety needs to be considered, such as Figure 14b As shown, the heat dissipation holes 3h are distributed on the left and right sides of the lower part of the shunt base 3, forming a creepage distance path e, which meets the electrical safety requirements.

[0054] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of the present invention.

Claims

1. An integrated DC electric energy meter, characterized in that: It includes an instrument upper shell, an instrument lower shell, a shunt base, a lead seal cover, a lower circuit board, an upper circuit board and a shunt; An electronic lead seal is provided at the bottom right side of the upper shell of the instrument, a display window and a wiring port are respectively provided at the lower and upper surface parts of the upper shell of the instrument, an N-phase screw slot is provided at the bottom of the upper shell of the instrument, and buckle slots are provided on both sides of the upper shell of the instrument; A diverter bottom support for supporting the bottom of the diverter is fixed at the middle position of the bottom inner portion of the diverter base along the length direction, and positioning columns are fixed to the upper and lower parts of the diverter bottom support respectively. The top of each positioning column is provided with a first outer buckle on the outer side and a first inner buckle on the inner side, and buckle holes are provided on the left and right inner walls of the diverter base; The diverter is provided with a plurality of signal sampling needles, and the diverter is provided with positioning holes corresponding to the positioning posts on both sides of the signal sampling needles; A strong and weak electrical isolation wall is provided on the upper part of the inner bottom of the lower shell of the instrument. Front buckles corresponding to the buckle grooves are respectively provided on the front sides of the left and right side walls of the lower shell of the instrument, and rear buckles corresponding to the buckle holes are respectively provided on the rear sides of the left and right side walls. A positioning column hole corresponding to the positioning column and a shunt pinhole corresponding to the signal sampling needle are provided in the lower shell of the instrument. An N-end wire pressing frame groove is provided on the lower inner wall of the lower shell of the instrument, and a second inner buckle corresponding to the first outer buckle is provided on the upper and lower inner walls of the lower shell of the instrument; An electronic seal column is provided inside the seal housing; The bottom of the lower circuit board is provided with an N terminal, the lower circuit board is provided with a signal sampling welding hole corresponding to the signal sampling pin and a strong and weak current isolation groove corresponding to the strong and weak current isolation wall, and the upper and lower ends of the lower circuit board are respectively provided with a second outer buckle corresponding to the first inner buckle; The bottom of the upper circuit board is provided with an electronic seal button, and the lower part and the upper part of the upper circuit board are respectively provided with a display element corresponding to the display window and a functional terminal corresponding to the wiring port; The shunt is installed in the shunt base, each of the positioning holes is inserted into the corresponding positioning column, the lower shell of the instrument is installed in the shunt base, each of the positioning column holes is inserted into the corresponding positioning column, each of the shunt pinholes is inserted into the corresponding signal sampling needle, each of the second inner buckle is overlapped with the corresponding first outer buckle, each of the rear buckle is overlapped with the corresponding buckle hole, the lower circuit board is installed in the lower shell of the instrument, each of the signal sampling welding hole is inserted into the corresponding signal sampling needle and welded and fixed, the strong and weak current isolation slot is inserted into the corresponding strong and weak current isolation wall, the The N terminal is installed in the corresponding N terminal wire frame groove, each of the second outer buckles is overlapped with the corresponding first inner buckle, the upper circuit board is installed in the lower shell of the instrument, the upper shell of the instrument is docked and fixed with the lower shell of the instrument, the electronic seal button corresponds to the electronic seal opening, the display window corresponds to the display element, the wiring port corresponds to the functional terminal, the wiring screw of the N terminal is placed in the N phase screw slot, the buckle slot is overlapped with the corresponding front buckle, the seal cover is docked with the diverter base and fixed to the upper shell of the instrument, and the electronic seal column is in a pressing state on the electronic seal button.

2. The integrated DC electric energy meter according to claim 1, characterized in that: The back of the diverter base is provided with a rail-mounted accessory mounting hole, and the rail-mounted accessory is mounted on the diverter base after being screwed through the rail-mounted accessory and the rail-mounted accessory mounting hole.

3. The integrated DC electric energy meter according to claim 1, wherein: Circuit board supports for supporting the lower circuit board are fixed at the four corner positions of the inner bottom of the instrument lower shell.

4. The integrated DC electric energy meter according to claim 1, wherein: A first lead seal nut portion is provided at the right top and left bottom of the upper shell of the instrument, and a first lead seal screw groove is provided at the right top and left bottom of the surface of the lead seal cover shell. The first lead seal screw is passed through the first lead seal screw groove and is screwed and fixed to the first lead seal nut portion.

5. The integrated DC electric energy meter according to claim 1, wherein: A second lead seal screw groove is provided at the right bottom of the upper shell of the instrument, and a second lead seal nut portion is provided at the right bottom of the lower shell of the instrument. The second lead seal screw groove is located below the electronic lead seal opening. The second lead seal screw and the lead seal buckle are installed in the second lead seal screw groove, and the second lead seal screw is threadedly connected to the second lead seal nut portion through the second lead seal screw groove.

6. The integrated DC electric energy meter according to claim 5, characterized in that: The left and right side walls of the lead seal cover are provided with wiring holes, the left top of the instrument upper shell is provided with a first wiring buckle, and the bottom of the instrument lower shell and behind the second lead seal nut part is provided with a second wiring buckle.

7. The integrated DC electric energy meter according to claim 1, characterized in that: The upper and lower walls of the diverter base are both provided with first heat dissipation holes, and the left and right walls of the diverter base are both provided with second heat dissipation holes.

8. The integrated DC electric energy meter according to claim 1, wherein: The upper and lower ends of the bottom support of the diverter are respectively provided with nut grooves for installing nuts, and the two positioning columns are located between the two nut grooves. The upper and lower ends of the diverter are respectively provided with screw holes corresponding to the nut grooves, and two combination screws are respectively passed through the corresponding screw holes and screwed to the nuts for fixing.

9. The integrated DC electric energy meter according to claim 1, wherein: Two shell limit supports are fixed to the left and right inner walls of the diverter base, and the bottom of the instrument lower shell is placed on the four shell limit supports.

10. The integrated DC electric energy meter according to claim 1, wherein: A diverter support is fixed to the outer edge of the bottom of the lower shell of the instrument. After being installed in place, the diverter support contacts the surface of the diverter.

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