Safe three-phase meter

Abstract

The utility model discloses a safe three-phase meter which comprises a meter body, a display screen is arranged on the meter body and used for displaying information of the meter body, a plurality of buttons are arranged at the front end of the lower side of the meter body and serve as button switches for controlling the meter body, and two connecting wires are fixedly arranged at the rear end of the meter body and used for being connected into a circuit. The lower end face of the meter body is fixedly connected with a connecting shell, the lower end face of the connecting shell is fixedly connected with a mounting plate, the mounting plate is used for mounting and protecting the meter body, an electric brake is fixedly arranged at the rear end of the connecting shell, a knife switch is arranged at the lower end of the electric brake, and the electric brake is electrically connected with the meter body. By means of the limiting block, the connecting rod, the reset spring and the sliding plate, the limiting block, the connecting rod and the sliding plate can be pushed to move rightwards and compress the reset spring when the rotating plate rotates, after the rotating plate rotates, the limiting block abuts against the rotating plate in parallel through reset of the reset spring, and then the rotating plate is limited.

Description

Technical Field

[0001] The utility model relates to the field of three-phase meters, in particular to a safe three-phase meter. Background Art

[0002] Three-phase ammeters are mainly used in control systems, energy management systems, substation automation, distribution network automation, building automation, industrial automation, community power monitoring, smart buildings, switch cabinets, etc. Their main function is to measure the three-phase current parameters in the power grid. When in use, just connect the external wires to the wiring terminals inside the three-phase ammeter. Since there is a risk of electric shock when the circuit connected to the three-phase energy meter is in use, it is necessary to trip and cut off the power, and it is necessary to avoid re-closing due to accidental collision. Utility Model Content

[0003] The purpose of the utility model is to provide a safe three-phase meter to solve the problems raised in the above background technology.

[0004] To achieve the above object, the utility model provides the following technical solutions: a safe three-phase meter, comprising a meter body, a display screen is provided on the meter body, the display screen is used to display meter information, a plurality of buttons are provided at the front end of the lower side of the meter body, the buttons are button switches for controlling the meter body, and two connecting wires are fixedly provided at the rear end of the meter body, the connecting wires are used to connect to the circuit;

[0005] The lower end surface of the meter body is fixedly connected to a connecting shell, and the lower end surface of the connecting shell is fixedly connected to a mounting plate, and the mounting plate is used to install and protect the meter body. A switch is fixedly provided at the rear end of the connecting shell, and a knife switch is provided at the lower end of the switch. The switch is electrically connected to the meter body. When the circuit is short-circuited, the switch can disconnect the circuit of the meter body by tripping the knife switch.

[0006] The left end of the electric switch is rotatably connected with a rotating shaft, and the rotating shaft is fixedly connected with a rotating plate.

[0007] A knife groove is arranged in the knife.

[0008] The right end surface of the rotating plate is fixedly connected with a sliding rod which is slidably connected to the gate knife groove, and the movement of the gate knife can drive the sliding rod to move.

[0009] The left end wall of the switch is fixedly connected with a sliding sleeve, and a sliding groove is arranged in the sliding sleeve.

[0010] A sliding plate is slidably connected in the sliding groove, and a return spring is connected between the sliding plate and the right end wall of the sliding groove.

[0011] The left end surface of the sliding plate is fixedly connected with a connecting rod, and the connecting rod is fixedly connected with a limiting block. The limiting block is parallel to the rotating plate after the knife switch trips, thereby blocking the rotating plate to avoid closing caused by accidental contact and collision.

[0012] The cross-sectional area of ​​the limit block decreases from left to right.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model is provided with an electric switch, which can trip the knife provided in the electric switch when a short circuit occurs in the meter body, thereby cutting off the meter body circuit to avoid safety risks, and the knife tripping movement drives the sliding rod, the rotating plate and the rotating shaft to rotate, and then the sliding rod limits the knife, thereby avoiding safety risks;

[0015] By setting the limit block, connecting rod, reset spring and sliding plate, the limit block, connecting rod and sliding plate can be pushed to the right and compress the reset spring when the rotating plate rotates. After the rotating plate completes its rotation, the reset spring resets the limit block to make it parallel to the rotating plate, thereby limiting the rotating plate and avoiding the risk of accidental closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 An overall three-dimensional schematic diagram of a safety three-phase meter proposed for the utility model;

[0017] Figure 2 A three-dimensional schematic diagram of a safety three-phase meter from the right side proposed in the utility model;

[0018] Figure 3 A three-dimensional schematic diagram of a safe three-phase meter from top view proposed for the utility model;

[0019] Figure 4 A schematic diagram of the structure of the switch part of a safety three-phase meter proposed in the utility model;

[0020] Figure 5 for Figure 4 Right view of;

[0021] Figure 6 This is a structural schematic diagram of a sliding sleeve part in a safety three-phase meter proposed in the utility model;

[0022] In the figure: 101, meter body; 102, display screen; 103, button; 104, connecting wire; 105, connecting shell; 106, mounting plate; 107, switch; 108, knife switch; 109, knife switch slot; 111, rotating shaft; 112, rotating plate; 113, sliding rod; 114, sliding sleeve; 115, sliding slot; 116, reset spring; 117, sliding plate; 118, connecting rod; 119, limit block. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1:

[0025] See also Figure 1-6 The utility model provides a technical solution: a safe three-phase meter, including a meter body 101, a display screen 102 is provided on the meter body 101, the display screen 102 is used to display meter information, a plurality of buttons 103 are provided at the front end of the lower side of the meter body 101, the buttons 103 are button switches for controlling the meter body 101, and two connecting wires 104 are fixedly provided at the rear end of the meter body 101, and the connecting wires 104 are used to connect to the circuit;

[0026] A connecting shell 105 is fixedly connected to the lower end surface of the meter body 101, and a mounting plate 106 is fixedly connected to the lower end surface of the connecting shell 105. The mounting plate 106 is used to install and protect the meter body 101. A switch 107 is fixedly provided at the rear end of the connecting shell 105. A knife switch 108 is provided at the lower end of the switch 107. The switch 107 is electrically connected to the meter body 101. When the circuit is short-circuited, the switch 107 can disconnect the circuit of the meter body 101 by tripping the knife switch 108.

[0027] The left end of the switch 107 is rotatably connected to a rotating shaft 111 , and the rotating shaft 111 is fixedly connected to a rotating plate 112 .

[0028] The knife 108 is provided with a knife groove 109 therein.

[0029] A sliding rod 113 slidably connected to the gate knife groove 109 is fixedly connected to the right end surface of the rotating plate 112 , and the sliding rod 113 can be driven to move by the movement of the gate knife 108 .

[0030] A sliding sleeve 114 is fixedly connected to the left end wall of the switch 107 , and a sliding groove 115 is provided in the sliding sleeve 114 .

[0031] A sliding plate 117 is slidably connected in the sliding groove 115 , and a return spring 116 is connected between the sliding plate 117 and the right end wall of the sliding groove 115 .

[0032] The left end face of the sliding plate 117 is fixedly connected with a connecting rod 118, and the connecting rod 118 is fixedly connected with a limiting block 119. The limiting block 119 is parallel to the rotating plate 112 after the knife switch 108 trips, thereby blocking the rotating plate 112 to avoid closing caused by accidental contact and collision.

[0033] The cross-sectional area of ​​the limit block 119 decreases from left to right.

[0034] Working principle:

[0035] When in use, the meter body 101 is fixed to the use station through the mounting plate 106, and connected to the circuit through two connecting wires 104, controlled by the button 103, and displayed on the display screen 102;

[0036] When in use, if a short circuit or the like occurs, the switch 107 electrically connected to the meter body 101 trips, and the switch blade 108 moves, driving the sliding rod 113 to move, and then driving the rotating plate 112 and the rotating shaft 111 to rotate. When the rotating plate 112 rotates, it passes through the limit block 119. At this time, the rotating plate 112 contacts the inclined surface of the limit block 119, and then pushes the limit block 119, the connecting rod 118 and the sliding plate 117 to move and compress the reset spring 116;

[0037] When the knife switch 108 moves to the point where the tripping is completed, the rotating plate 112 no longer presses against the limit block 119. The sliding plate 117, the connecting rod 118 and the limit block 119 are elastically reset by the reset spring 116. At this time, the limit block 119 is parallel to the rotating plate 112 and contacts the rotating plate 112 at one end surface. The limit block 119 limits the reset movement of the rotating plate 112, thereby ensuring that there will be no accidental contact or collision to close the switch, thereby avoiding safety risks. When closing the switch is required, the limit block 119, the connecting rod 118 and the sliding plate 117 are manually pressed to move to the right to reset the knife switch 108 and close the switch.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A safety three-phase meter, comprising a meter body (101), characterized in that: The meter body (101) is provided with a display screen (102); a plurality of buttons (103) are provided at the front end of the lower side of the meter body (101); the buttons (103) are push button switches for controlling the meter body (101); and two connecting wires (104) are fixedly provided at the rear end of the meter body (101); The lower end surface of the meter body (101) is fixedly connected to a connection shell (105), the lower end surface of the connection shell (105) is fixedly connected to a mounting plate (106), the mounting plate (106) is used to mount and protect the meter body (101), a switch (107) is fixedly provided at the rear end of the connection shell (105), a switch blade (108) is provided at the lower end of the switch (107), and the switch (107) is electrically connected to the meter body (101).

2. A safety three-phase meter according to claim 1, characterized in that: The left end of the switch (107) is rotatably connected to a rotating shaft (111), and the rotating shaft (111) is fixedly connected to a rotating plate (112).

3. A safety three-phase meter according to claim 2, characterized in that: The knife gate (108) is provided with a knife gate groove (109).

4. A safety three-phase meter according to claim 3, characterized in that: The right end surface of the rotating plate (112) is fixedly connected with a sliding rod (113) which is slidably connected to the gate knife groove (109), and the movement of the gate knife (108) can drive the sliding rod (113) to move.

5. A safety three-phase meter according to claim 4, characterized in that: The left end wall of the switch (107) is fixedly connected with a sliding sleeve (114), and a sliding groove (115) is provided in the sliding sleeve (114).

6. A safety three-phase meter according to claim 5, characterized in that: A sliding plate (117) is slidably connected in the sliding groove (115), and a return spring (116) is connected between the sliding plate (117) and the right end wall of the sliding groove (115).

7. A safety three-phase meter according to claim 6, characterized in that: The left end surface of the sliding plate (117) is fixedly connected with a connecting rod (118), and the connecting rod (118) is fixedly connected with a limiting block (119). The limiting block (119) is parallel to the rotating plate (112) after the knife switch (108) is tripped.

8. A safety three-phase meter according to claim 7, characterized in that: The cross-sectional area of ​​the limit block (119) decreases from left to right.

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