Three-phase 7P electric energy meter

Abstract

The utility model discloses a three-phase 7P electric energy meter which is convenient to check and has a better electricity larceny prevention function. According to the technical scheme, the wiring terminal comprises a base, a PCB installed in the base and an upper cover installed at the upper end of the base, a wiring terminal base is arranged at the end of the base, and a group of wiring terminal assemblies are arranged in the wiring terminal base. The wiring terminal assembly comprises a U-shaped connector bar, wiring frames arranged at the two ends of the U-shaped connector bar and wiring screws connected to the upper ends of the wiring frames in a threaded mode, a mutual inductor is arranged at the front end of the U-shaped connector bar, and a sliding groove is formed in the upper end of the wiring terminal base; a first detection screw, a second detection screw and a detection sliding short-circuit piece are arranged in the sliding groove, the lower end of the first detection screw is in threaded connection with the U-shaped connector bar, and the lower end of the second detection screw is in threaded connection with the rear end of the PCB connecting bar.

Description

Technical Field

[0001] The utility model relates to an electric energy meter. Background Art

[0002] The three-phase 7P electric energy meter is mainly used to measure the electric energy parameters in the AC circuit. In addition to the conventional voltage, current, active power, and reactive power, it can also measure advanced power quality parameters such as three-phase imbalance and harmonics. The electric energy meter needs to be calibrated before leaving the factory. During the calibration, the meter casing needs to be disassembled and the internal calibration terminals need to be connected. After the calibration is completed, it is disconnected from the inside, which is inconvenient to operate. In addition, the casing of the traditional three-phase 7P electric energy meter is easy to be disassembled, and the anti-theft function is poor. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a three-phase 7P electric energy meter which is convenient for calibration and has better anti-electricity theft function.

[0004] To solve the above problems, the technical solution adopted by the utility model includes: a base, a PCB board installed in the base and an upper cover installed on the upper end of the base, the end of the base is provided with a terminal block, a group of terminal components are provided in the terminal block, the terminal components include a U-shaped terminal block, a terminal frame provided at both ends of the U-shaped terminal block and a terminal screw screwed on the upper end of the terminal frame, a mutual inductor is provided at the front end of the U-shaped terminal block, characterized in that: a slide groove is provided at the upper end of the terminal block, a first detection screw, a second detection screw and a detection sliding shorting piece are provided in the slide groove, the lower end of the first detection screw is threadedly connected to the U-shaped terminal block, the lower end of the second detection screw is threadedly connected to the rear end of the PCB board connection row, the detection sliding shorting piece can be slidably arranged in the slide groove, and is provided with a long groove connected to the second detection screw and a U-shaped mouth that cooperates with the second detection screw for on / off.

[0005] The three-phase 7P electric energy meter is characterized in that the end of the detection sliding short-circuit is bent to form a dial button.

[0006] The three-phase 7P electric energy meter is characterized in that a connection row slot is provided at the front end of the terminal block, and the PCB board connection row is plugged into the connection row slot.

[0007] The three-phase 7P electric energy meter is characterized in that a supporting surface is provided at the front end of the terminal block, and after the U-shaped terminal block is connected to the first detection screw, the end surface of the U-shaped terminal block is tightly attached to the supporting surface.

[0008] The three-phase 7P electric energy meter is characterized in that a flip cover is hinged on the upper cover, and the flip cover covers the first detection screw, the second detection screw, the detection sliding short-circuit piece and the terminal assembly.

[0009] The three-phase 7P electric energy meter is characterized in that a screw hole is provided at the bottom of the base, and the base is connected to the upper cover by installing mounting screws in the screw hole, and a lead sealing cap is provided in the screw hole.

[0010] The three-phase 7P electric energy meter is characterized in that a lead sealing hole is provided between the upper cover and the flip cover.

[0011] The three-phase 7P electric energy meter is characterized in that convex ribs are provided on both sides of the upper cover to abut against the flip cover.

[0012] The three-phase 7P electric energy meter is characterized in that a wiring nut is provided at the front end of the PCB board connection row.

[0013] The advantages of the three-phase 7P electric energy meter of the utility model are as follows: 1. The internal inspection circuit can be connected and disconnected by sliding the short-circuit piece outside the shell, and there is no need to disassemble the shell for inspection, making the inspection more convenient; 2. The screws connecting the base and the upper cover are provided with lead sealing caps, which can prevent the shell from being opened by non-staff, thereby playing a role in preventing electricity theft; 3. After the first detection screws are tightened with the U-shaped terminal block, the reliability of the installation of the U-shaped terminal block can also be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0015] Figure 1 It is a cross-sectional view of the three-phase 7P electric energy meter of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the utility model three-phase 7P electric energy meter;

[0017] Figure 3 It is a schematic diagram of the bottom structure of the three-phase 7P electric energy meter of the utility model;

[0018] Figure 4 It is an assembly diagram between the terminal block of the utility model and the terminal assembly and the detection terminal assembly (composed of a first detection screw, a second detection screw, a detection sliding shorting piece and a PCB board connection row);

[0019] Figure 5 It is a schematic diagram of the assembly between the wiring terminal assembly and the detection terminal assembly of the utility model;

[0020] Figure 6 It is a structural schematic diagram of the detection terminal assembly of the utility model;

[0021] Figure 7 It is an exploded view of the detection terminal assembly of the utility model;

[0022] Figure 8 It is a structural schematic diagram of a wiring terminal block of the utility model. DETAILED DESCRIPTION

[0023] like Figures 1 to 8 As shown, the three-phase 7P electric energy meter of the utility model comprises a base 1, a PCB board 2 installed in the base 1 and an upper cover 3 installed on the upper end of the base 1. A terminal block 4 is provided at the end of the base 1, and a group of terminal assembly 5 is provided in the terminal block 4. The terminal assembly 5 comprises a U-shaped wiring block 6, a wiring frame 7 provided at both ends of the U-shaped wiring block 6 and a wiring screw 8 screwed on the upper end of the wiring frame 7, and a mutual inductor 9 is provided at the front end of the U-shaped wiring block 6. One end of the U-shaped wiring block 6 is a conducting end and the other end is an outlet end. A slide groove 10 is provided at the upper end of the terminal block 4, and a first detection screw 11, a second detection screw 12 and a detection sliding shorting piece 13 are provided in the slide groove 10. After the first detection screw 11 is installed in the first screw hole 27 of the slide groove 10, its lower end is threadedly connected with the U-shaped wiring block 6, and after the second detection screw 12 is installed in the second screw hole 28 of the slide groove 10, its lower end is threadedly connected with the rear end of the PCB board connection row 14. The PCB board connection row 14 is connected to the PCB board 2 through a wire. The detection sliding shorting piece 13 is slidably arranged in the slide groove 10, and the detection sliding shorting piece 13 is provided with a long groove 15 connected to the second detection screw 12 and a U-shaped opening 16 that cooperates with the second detection screw 12 for on / off. During the inspection, the detection sliding shorting piece 13 is slid toward the side of the second detection screw 12 to connect with it; when the inspection is completed, the detection sliding shorting piece 13 is slid to the other side to disconnect from the second detection screw 12.

[0024] Preferably, the end of the detection sliding shorting piece 13 is bent to form a dial button 17 to facilitate the user to dial the detection sliding shorting piece 13 .

[0025] Preferably, a connection row slot 18 is provided at the front end of the wiring terminal seat 4, and the PCB board connection row 14 is plugged into the connection row slot 18 to facilitate the installation of the PCB board connection row 14.

[0026] Preferably, a support surface 19 is provided at the front end of the terminal block 4. After the U-shaped terminal block 6 is connected to the first detection screw 11, the end surface of the U-shaped terminal block 6 is tightly attached to the support surface 19 to improve the reliability of the installation of the U-shaped terminal block 6.

[0027] Preferably, a flip cover 20 is hinged on the upper cover 3, and the flip cover 20 covers the first detection screw 11, the second detection screw 12, the detection sliding shorting piece 13 and the terminal assembly 5 to protect the terminals. Both sides of the upper cover 3 are provided with convex ribs 25 against the flip cover 20. When the flip cover 20 is opened, it is clamped and fixed by the convex ribs 25 for easy use.

[0028] Preferably, a screw hole 21 is provided at the bottom of the base 1, and the base 1 is connected to the upper cover 3 by inserting a mounting screw 22 into the screw hole 21, and a lead seal cap 23 is provided in the screw hole 21 to prevent the housing from being opened by non-staff.

[0029] Preferably, a lead sealing hole 24 is provided between the upper cover 3 and the flip cover 20 , and a lead sealing member is installed in the lead sealing hole 24 to prevent the flip cover 20 from being opened by non-staff.

[0030] Preferably, a wiring nut 26 is provided at the front end of the PCB board connection row 14 to facilitate wiring of the PCB board connection row 14 .

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims

1. A three-phase 7P electric energy meter, comprising a base (1), a PCB board (2) installed in the base (1), and an upper cover (3) installed on the upper end of the base (1), wherein a terminal block (4) is provided at the end of the base (1), a group of terminal blocks (5) are provided in the terminal block (4), the terminal block assembly (5) comprises a U-shaped terminal block (6), a terminal block frame (7) provided at both ends of the U-shaped terminal block (6), and a terminal screw (8) screwed to the upper end of the terminal block (7), a mutual inductor (9) is provided at the front end of the U-shaped terminal block (6), and characterized in that: The upper end of the terminal block (4) is provided with a slide groove (10), and a first detection screw (11), a second detection screw (12) and a detection sliding shorting piece (13) are provided in the slide groove (10), the lower end of the first detection screw (11) is threadedly connected to the U-shaped terminal block (6), and the lower end of the second detection screw (12) is threadedly connected to the rear end of the PCB board connection row (14), and the detection sliding shorting piece (13) is slidably arranged in the slide groove (10) and is provided with a long groove (15) connected to the second detection screw (12) and a U-shaped opening (16) that cooperates with the second detection screw (12) in on / off.

2. The three-phase 7P electric energy meter according to claim 1, characterized in that: The end of the detection sliding shorting piece (13) is bent to form a dial button (17).

3. The three-phase 7P electric energy meter according to claim 1, characterized in that: A connection row slot (18) is provided at the front end of the wiring terminal seat (4), and the PCB board connection row (14) is plugged into the connection row slot (18).

4. The three-phase 7P electric energy meter according to claim 1, characterized in that: A support surface (19) is provided at the front end of the wiring terminal seat (4); after the U-shaped wiring block (6) is connected to the first detection screw (11), the end surface of the U-shaped wiring block (6) is closely attached to the support surface (19).

5. The three-phase 7P electric energy meter according to claim 1, characterized in that: A flip cover (20) is hingedly connected to the upper cover (3), and the flip cover (20) covers the first detection screw (11), the second detection screw (12), the detection sliding shorting piece (13) and the terminal assembly (5).

6. The three-phase 7P electric energy meter according to claim 1, characterized in that: The base (1) is provided with a screw hole (21) at the bottom thereof, and is connected to the upper cover (3) by inserting a mounting screw (22) into the screw hole (21), and a lead sealing cap (23) is provided in the screw hole (21).

7. The three-phase 7P electric energy meter according to claim 5, characterized in that: A lead sealing hole (24) is provided between the upper cover (3) and the flip cover (20).

8. The three-phase 7P electric energy meter according to claim 5, characterized in that: Convex ribs (25) are provided on both sides of the upper cover (3) to abut against the flip cover (20).

9. The three-phase 7P electric energy meter according to claim 1, characterized in that: A wiring nut (26) is provided at the front end of the PCB board connection row (14).

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