CN108196102B

CN108196102B - Mechanical ammeter

Info

Publication number: CN108196102B
Application number: CN201810160332.4A
Authority: CN
Inventors: 庄建新; 杨爽; 王施强
Original assignee: Zhejiang Xinghao Technology Co ltd
Current assignee: Zhejiang Xinghao Technology Co ltd
Priority date: 2018-02-27
Filing date: 2018-02-27
Publication date: 2023-08-15
Anticipated expiration: 2038-02-27
Also published as: CN108196102A

Abstract

The invention discloses a mechanical ammeter which comprises a bottom shell, wherein a wiring terminal hole is formed in the bottom shell, a support is arranged in the bottom shell, a first transformer is arranged on the upper portion of the support, a second transformer and a third transformer are arranged on the lower portion of the support in parallel, a rotating shaft is connected to the support in a rotating mode, an upper aluminum disc and a lower aluminum disc are arranged on the rotating shaft, the upper aluminum disc is arranged on the first transformer, the lower aluminum disc is arranged on the second transformer and the third transformer, a braking permanent magnet fixedly connected with the support is arranged above the upper aluminum disc, a threaded column is arranged at the upper end of the rotating shaft, a mechanical counter is arranged on the upper portion of the support, the mechanical counter comprises a counting frame, a counting disc, a counting gear, a first transmission gear, a second transmission gear and a third transmission gear, and the third transmission gear is in transmission connection with the threaded column. The mechanical ammeter has the characteristics of small metering error and convenient reading, and has perfect overall function and strong practicability.

Description

Mechanical ammeter

Technical Field

The invention relates to a mechanical counter device, in particular to a mechanical ammeter.

Background

Most of the existing electric meters are digital display type electric meters, but mechanical electric meters can be used in partial regions or countries, and the mechanical electric meters have special advantages in high-temperature and high-humidity regions. The method has the advantages of high accuracy, good stability, long service life and the like in specific areas.

The usual way to read the power of a three-phase four-wire mutual inductance meter is the ratio of the counter reading times the mutual inductance. The mechanical meter mainly comprises a voltage coil, a current coil (i.e. a mutual inductor), a rotating shaft, a brake magnet, a gear, a counter and the like. The working principle of the mechanical kilowatt-hour meter is as follows: when the ammeter is connected to the circuit to be tested, alternating currents can be generated in the voltage coil and the current coil to flow through, and the two alternating currents respectively generate alternating magnetic fluxes in the iron cores between the two alternating currents; alternating magnetic flux passes through the aluminum disc, and eddy currents are induced in the aluminum disc; the eddy currents in turn receive forces in the magnetic field, which in turn cause the aluminum disk to turn by torque. The faster the load consumes the power, the larger the moment of rotation of the aluminum disc, and the counter is driven by the worm to indicate the consumed electric energy when the aluminum disc rotates.

In the process, the counter rotates due to the fact that electric energy is converted into electric energy, counting errors are caused by friction torque and other factors, meanwhile, the traditional electric quantity reading mode is that the counter displays electric quantity and the ratio of mutual inductance is multiplied, and therefore metering deviation of the mutual inductance type electric meter is large and the overall effect is poor. Accordingly, the invention provides a mechanical ammeter.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the mechanical ammeter which has the characteristics of small metering error and convenient reading.

In order to solve the technical problems, the aim of the invention is realized as follows: the invention relates to a mechanical ammeter which comprises a bottom shell, wherein a wiring terminal hole is formed in the bottom shell, a support is arranged in the bottom shell, a first transformer is arranged on the upper portion of the support, a second transformer and a third transformer are arranged on the lower portion of the support in parallel, a rotating shaft is connected to the support in a rotating mode, an upper aluminum disc and a lower aluminum disc are arranged on the rotating shaft, the upper aluminum disc is arranged on the first transformer, the lower aluminum disc is arranged on the second transformer and the third transformer, a braking permanent magnet fixedly connected with the support is arranged above the upper aluminum disc, a threaded column is arranged at the upper end of the rotating shaft, a mechanical counter is arranged on the upper portion of the support, the mechanical counter comprises a counting frame fixedly connected with the support, a counting gear connected with the counting frame in a rotating mode, a transmission gear I connected with the shaft end of the counting gear, a transmission gear II meshed with the transmission gear I, and a transmission gear III coaxially connected with the transmission gear II, and the transmission gear III is in transmission connection with the threaded column.

As a further scheme of the invention: the diameter of the transmission gear III is larger than that of the transmission gear II.

As a further scheme of the invention: the diameters of the upper aluminum disc and the lower aluminum disc are equal.

As a further scheme of the invention: and scale marks are arranged on the upper surface of the upper aluminum disc.

As a further scheme of the invention: the bottom shell is provided with a threaded hole.

The beneficial effects of the invention are as follows: according to the mechanical ammeter, the first transmission gear, the second transmission gear and the third transmission gear are additionally arranged on the mechanical counter, the third transmission gear is connected with the threaded column in a transmission mode, and the mechanical ammeter is manufactured in a shape according to a set transmission ratio, so that under the condition that a voltage coil and a current coil (namely a transformer), a rotating shaft, a brake magnet and a gear of the mechanical ammeter are not changed, only the change ratio of the counter is changed, the primary electric quantity of the counter is directly read according to the different mutual inductance ratios, metering deviation caused by friction torque and other factors is reduced, the whole function is perfect, and the practicability is high.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic view of a portion of the structure of the present invention;

reference numerals illustrate: 1. a bottom case; 2. a terminal hole; 3. a support; 4. a first transformer; 5. a second transformer; 6. a third transformer; 7. a rotating shaft; 8. an aluminum disc is arranged; 9. a lower aluminum disc; 10. braking the permanent magnet; 11. a threaded column; 12. a mechanical counter; 121. a counting frame; 122. a counting plate; 123. a counting gear; 124. a first transmission gear; 125. a transmission gear II; 126. a transmission gear III; 13. and (3) a threaded hole.

Detailed Description

The invention will be further described with reference to the drawings and preferred embodiments.

As shown in fig. 1 and 2, a mechanical ammeter according to this embodiment includes a bottom shell 1, a wiring terminal hole 2 is provided on the bottom shell 1, a support 3 is provided in the bottom shell 1, a first transformer 4 is provided on the upper portion of the support 3, a second transformer 5 and a third transformer 6 are provided in parallel on the lower portion of the support 3, a rotating shaft 7 is rotatably connected to the support 3, an upper aluminum disc 8 and a lower aluminum disc 9 are provided on the rotating shaft 7, the upper aluminum disc 8 is provided on the first transformer 4, the lower aluminum disc 9 is provided on the second transformer 5 and the third transformer 6, a braking permanent magnet 10 fixedly connected with the support 3 is provided above the upper aluminum disc 8, a threaded post 11 is provided on the upper end of the rotating shaft 7, a mechanical counter 12 is provided on the upper portion of the support 3, the mechanical counter 12 includes a counter frame 121 fixedly connected with the support 3, a counter disc 122 rotatably connected to the counter frame 121, a counter gear 123 for linking the counter disc 122, a transmission gear 124 connected to the shaft end of the counter gear 123, a transmission gear 124 engaged with the transmission gear 124, a transmission gear 125, and a transmission gear 125 connected to the transmission post 126, and a transmission post 126.

The three transformers are not annularly arranged on one aluminum disc, but are arranged on the upper part of the support 3 through the first transformer 4, the second transformer 5 and the third transformer 6 are arranged on the lower part of the support 3, and two aluminum discs (an upper aluminum disc 8 and a lower aluminum disc 9) are arranged through the rotating shaft 7, so that the thickness of the mechanical ammeter is reduced, the height direction is slightly lengthened, the mechanical counter 12 is conveniently arranged on the upper part of the support 3, and the reading of the numerical value on the mechanical counter 12 is facilitated; because the conventional mechanical ammeter is directly in transmission connection with the rotating shaft 7 and the counting disc 122, the display numerical value on the mechanical counter 12 is not the numerical value required by a final reader, the numerical value displayed by the counting disc 122 is multiplied by the ratio of mutual inductance, and the primary electric quantity of the counter is directly read by the ratio of different mutual inductances through additionally arranging the transmission gear I124, the transmission gear II 125 and the transmission gear III 126, and the transmission gear III 126 is in transmission connection with the threaded column 11 and is manufactured in a shape according to the set transmission ratio, so that the primary electric quantity of the counter is conveniently read.

Further, the diameter of the third transmission gear 126 is larger than that of the second transmission gear 125, and the third transmission gear 126 and the second transmission gear 125 are formed according to the designed transmission ratio, so that the electricity consumption can be directly read from the mechanical counter 12.

Further, the diameters of the upper aluminum disc 8 and the lower aluminum disc 9 are equal, the internal structure is compact, the upper aluminum disc 8 and the lower aluminum disc 9 are matched, the upper torque and the lower torque of the rotating shaft 7 are kept consistent, the rotating error is reduced, and the accuracy of the ammeter is improved.

Further, the scale marks are arranged on the upper surface of the upper aluminum disc 8, so that after the shell is installed on the bottom shell 1, when the upper aluminum disc 8 is observed through the shell, the rotation of the upper aluminum disc 8 can be intuitively observed, and the visualization degree is high.

Further, the bottom shell 1 is provided with a threaded hole 13, so that the shell is conveniently fixed on the bottom shell 1 through screws.

The invention adds the first transmission gear, the second transmission gear and the third transmission gear on the mechanical counter, is also connected with the transmission of the threaded column by the third transmission gear and is manufactured in a shape according to a set transmission ratio, so that under the condition of not changing a voltage coil and a current coil (i.e. a mutual inductor), a rotating shaft, a brake magnet and a gear of the mechanical watt-hour meter, only the change ratio of the counter is changed, the primary electric quantity of the counter is directly read by the ratio of different mutual inductances, the metering deviation caused by factors such as friction moment is reduced, the whole function is perfect, and the practicability is strong.

The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims

1. The utility model provides a mechanical ammeter, includes drain pan (1), is equipped with binding post hole (2), its characterized in that on drain pan (1): the utility model discloses a novel electric motor, which is characterized in that a support (3) is arranged in a bottom shell (1), a first mutual inductor (4) is arranged on the upper part of the support (3), a second mutual inductor (5) and a third mutual inductor (6) are arranged on the lower part of the support (3) in parallel, a rotating shaft (7) is connected to the support (3), an upper aluminum disc (8) and a lower aluminum disc (9) are arranged on the rotating shaft (7), the upper aluminum disc (8) is arranged on the first mutual inductor (4), the lower aluminum disc (9) is arranged on the second mutual inductor (5) and the third mutual inductor (6), a braking permanent magnet (10) fixedly connected with the support (3) is arranged above the upper aluminum disc (8), a threaded column (11) is arranged at the upper end of the rotating shaft (7), a mechanical counter (12) is arranged on the upper part of the support (3), the mechanical counter (12) comprises a counting frame (121) fixedly connected with the support (3), a counting disc (122) rotatably connected to the counting frame (121), a gear (123) connected to the counting disc (122), a first gear (125), a second gear (125) and a first gear (124) and a second gear (124) are meshed with a third gear (124), and a transmission gear III (126) is in transmission connection with the threaded column (11).

2. A mechanical electricity meter according to claim 1, wherein: the diameter of the third transmission gear (126) is larger than that of the second transmission gear (125).

3. A mechanical electricity meter according to claim 1, wherein: the diameters of the upper aluminum disc (8) and the lower aluminum disc (9) are equal.

4. A mechanical electricity meter according to claim 1, wherein: the upper surface of the upper aluminum disc (8) is provided with scale marks.

5. A mechanical electricity meter according to claim 1, wherein: the bottom shell (1) is provided with a threaded hole (13).