CN109581002B

CN109581002B - Electric power instrument convenient to ventilation cooling

Info

Publication number: CN109581002B
Application number: CN201910077540.2A
Authority: CN
Inventors: 张宇
Original assignee: Panjin Yunfei Petroleum Equipment Co ltd
Current assignee: Panjin Yunfei Petroleum Equipment Co.,Ltd.
Priority date: 2019-01-28
Filing date: 2019-01-28
Publication date: 2021-04-06
Anticipated expiration: 2039-01-28
Also published as: CN109581002A

Abstract

The invention relates to an electric instrument convenient for ventilation and heat dissipation, which comprises a meter shell and a display panel, wherein the meter shell is provided with a display screen and a plurality of keys, the meter shell is internally provided with a PLC, a dust collection mechanism and two ventilation mechanisms, each ventilation mechanism comprises a reciprocating component, a reciprocating plate and a plurality of ventilation components, each ventilation component comprises a ventilation hole, a first motor, a first driving shaft and two ventilation units, each dust collection mechanism comprises an ash discharge pipe, a fan, a cover plate, a second motor, a rotating plate, a driving component, two dust collection components and two orientation components, the electric instrument convenient for ventilation and heat dissipation is convenient for keeping the air circulation inside and outside the meter shell through the ventilation holes in the ventilation mechanisms, removing the dust around the ventilation holes by utilizing the movement and rotation of dredging blocks, further enhancing the ventilation, and not only the dust inside the meter shell is absorbed and discharged through the dust collection mechanism, and the heat dissipation of electronic components, the purpose of cooling is achieved, the service life of the instrument is prolonged, and the practicability of the equipment is improved.

Description

Electric power instrument convenient to ventilation cooling

Technical Field

The invention relates to the field of power equipment, in particular to a power instrument convenient for ventilation and heat dissipation.

Background

The electric power instrument is used as an advanced intelligent and digital electric network front-end acquisition element, is widely applied to various control systems, SCADA (supervisory control and data acquisition) systems, energy management systems, substation automation, community electric power monitoring, industrial automation, intelligent concurrent functions, intelligent power distribution cabinets, switch cabinets and other equipment, and has the characteristics of convenience in installation, simplicity in wiring, small engineering quantity and the like.

When the existing electric power instrument operates, the internal electronic components work in a closed environment, heat generated by operation is accumulated, the temperature inside the instrument is gradually increased, the electronic components work in a high-temperature environment, the measurement accuracy of the instrument is reduced, the service life of the device is shortened, heat dissipation holes can be additionally formed in a small amount of instruments, after long-term operation is finished, dust and impurities are easily accumulated on the heat dissipation holes, blockage caused by unsmooth air circulation is caused, the heat dissipation efficiency is reduced, and the practicability of the existing electric power instrument is reduced.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, the electric power meter convenient for ventilation and heat dissipation is provided.

The technical scheme adopted by the invention for solving the technical problems is as follows: a power instrument convenient for ventilation and heat dissipation comprises a meter shell and a display panel, wherein the display panel is fixedly connected with the meter shell, the meter shell is provided with a display screen and a plurality of keys, the meter shell is internally provided with a PLC (programmable logic controller), a dust collection mechanism and two ventilation mechanisms, the display screen and the keys are electrically connected with the PLC, and the two ventilation mechanisms are respectively positioned on two sides of the dust collection mechanism;

the ventilating mechanism comprises a reciprocating assembly, a reciprocating plate and a plurality of ventilating assemblies, the reciprocating assembly is positioned on one side of the reciprocating plate, the ventilating assemblies are uniformly distributed on the other side of the reciprocating plate from top to bottom, the reciprocating assembly is in transmission connection with the reciprocating plate, each ventilating assembly comprises a ventilating hole, a first motor, a first driving shaft and two ventilating units, the ventilating holes are formed in the inner wall of the watchcase, the first motor is fixed on the reciprocating plate and electrically connected with the PLC, the first motor is in transmission connection with the first driving shaft, the two ventilating units are respectively positioned on two sides of the first driving shaft, each ventilating unit comprises a spring, a dredging block and two limiting units, the dredging block is connected with the first driving shaft through the spring, the two limiting units are respectively positioned on two sides of the spring, and the spring is in a compressed state;

the dust collection mechanism comprises an ash discharge pipe, a fan, a cover plate, a second motor, a rotating plate, a driving assembly, two dust collection assemblies and two directional assemblies, the ash discharge pipe is fixed at the top in a shell, the fan is fixed in the ash discharge pipe, the cover plate is arranged at the top end of the ash discharge pipe, the two directional assemblies are respectively positioned at two ends of the cover plate, the second motor is fixed in the shell, the second motor and the fan are both electrically connected with a PLC (programmable logic controller), the second motor is in transmission connection with the rotating plate, the driving assembly is positioned below the rotating plate, the two dust collection assemblies are respectively positioned at two sides of the driving assembly, each dust collection assembly comprises a movable plate, a dust collection cover, a connecting pipe and two telescopic units, two ends of the movable plate are respectively connected with the driving assembly through the two telescopic units, the dust collection cover is fixed below the movable plate, and one end of the connecting pipe is communicated, the other end of connecting pipe sets up the bottom in the ash discharge pipe, flexible unit includes expansion bracket and two first connecting rods, the both sides of the one end of expansion bracket are articulated with the removal board through two first connecting rods respectively, the other end and the drive assembly of expansion bracket are connected.

Preferably, in order to drive the reciprocating plate to reciprocate, the reciprocating assembly comprises a third motor, a second connecting rod, a third connecting rod and a fourth connecting rod, the third motor is fixed in the watch case and electrically connected with the PLC, the third motor is in transmission connection with the second connecting rod, the second connecting rod is hinged with one end of the fourth connecting rod through the third connecting rod, and the other end of the fourth connecting rod is fixedly connected with the reciprocating plate.

Preferably, in order to realize the stable movement of the reciprocating plate, a sliding rod and a sliding ring are arranged on the upper side and the lower side of the fourth connecting rod, the sliding rod is fixedly connected with the reciprocating plate, the sliding ring is fixed in the watch case, and the sliding ring is sleeved on the sliding rod.

Preferably, in order to fix the relative position of the dredging block and the first driving shaft, the limiting unit comprises a limiting block, a limiting rod, a limiting ring and two supports, the limiting block is fixedly connected with the dredging block through the limiting rod, the two supports are respectively positioned on two sides of the limiting ring, the limiting ring is fixedly connected with the first driving shaft through the supports, and the limiting ring is sleeved on the limiting rod.

Preferably, in order to facilitate the dredging block to enter and exit the vent hole, the vertical section of the dredging block is shaped like an isosceles trapezoid, and the bottom side of the isosceles trapezoid of the dredging block is connected with the first driving shaft through a spring.

As preferred, stretch out and draw back for the drive expansion bracket, drive assembly includes fourth motor and two drive unit, the fourth motor is connected with the PLC electricity, and two drive unit are located the both sides of fourth motor respectively, drive unit and expansion unit one-to-one, drive unit includes bearing, lead screw and drive block, fourth motor and bearing are all fixed in the below of rotor plate, the fourth motor is connected with the one end transmission of lead screw, the other end setting of lead screw is in the bearing, the drive block cover is established on the lead screw, the drive block with the junction of lead screw be equipped with the screw thread that matches with the lead screw, bearing and drive block are articulated with the both sides of the one end of keeping away from the movable plate of expansion bracket respectively.

Preferably, in order to prevent the moving plate from touching the inner wall of the watch case, two ends of one side of the moving plate, which is far away from the expansion bracket, are provided with distance sensors, and the distance sensors are electrically connected with the PLC.

Preferably, in order to detect the temperature in the watch case, a temperature sensor is arranged in the watch case, and the temperature sensor is electrically connected with the PLC.

Preferably, in order to fix the moving direction of the cover plate, the orientation assembly comprises a fixing block and a fixing rod, the fixing block is fixed above the watch case through the fixing rod, and the cover plate is sleeved on the fixing rod.

Preferably, in order to secure the driving force of the first motor, the first motor is a dc servo motor.

The electric power meter convenient for ventilation and heat dissipation has the advantages that the ventilation hole in the ventilation mechanism is convenient for keeping the air circulation inside and outside the meter shell, the dust around the ventilation hole is removed by utilizing the movement and rotation of the dredging block, the ventilation is further enhanced, compared with the existing ventilation mechanism, the ventilation efficiency of the ventilation mechanism is higher, the dust inside the meter shell is absorbed and discharged by the dust absorption mechanism, the heat of electronic components inside the meter shell is conveniently dissipated, the purpose of cooling is achieved, the service life of the meter is prolonged, the practicability of the equipment is improved, and compared with the existing dust absorption mechanism, the dust absorption mechanism enlarges the action range through the movement and rotation of the dust absorption cover.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic diagram of the structure of an electrical meter for facilitating ventilation and heat dissipation of the present invention;

FIG. 2 is a cross-sectional view of a watch case of the present invention to facilitate ventilation and heat dissipation;

FIG. 3 is a schematic structural view of a ventilation mechanism of the electric power meter for facilitating ventilation and heat dissipation of the present invention;

FIG. 4 is a schematic structural view of a vent assembly of the electrical meter for facilitating ventilation and heat dissipation of the present invention;

FIG. 5 is a schematic view of the connection structure of the driving assembly and the dust collection assembly of the electric power meter for facilitating ventilation and heat dissipation;

in the figure: 1. the dust removal device comprises a watchcase, 2, a display panel, 3, a display screen, 4, a key, 5, a reciprocating plate, 6, a first motor, 7, a first driving shaft, 8, a spring, 9, a dredging block, 10, an ash discharge pipe, 11, a fan, 12, a cover plate, 13, a second motor, 14, a rotating plate, 15, a dust hood, 16, a connecting pipe, 17, a telescopic frame, 18, a first connecting rod, 19, a third motor, 20, a second connecting rod, 21, a third connecting rod, 22, a fourth connecting rod, 23, a sliding rod, 24, a sliding ring, 25, a limiting block, 26, a limiting rod, 27, a limiting ring, 28, a bracket, 29, a fourth motor, 30, a bearing, 31, a screw rod, 32, a driving block, 33, a distance sensor, 34, a temperature sensor, 35, a fixing block, 36, a fixing rod and 37, and a moving plate.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1-2, an electric power meter convenient for ventilation and heat dissipation comprises a meter case 1 and a display panel 2, wherein the display panel 2 is fixedly connected with the meter case 1, the meter case 1 is provided with a display screen 3 and a plurality of keys 4, the meter case 1 is internally provided with a PLC, a dust collection mechanism and two ventilation mechanisms, the display screen 3 and the keys 4 are electrically connected with the PLC, and the two ventilation mechanisms are respectively positioned at two sides of the dust collection mechanism;

this electric power instrument comprises watchcase 1 and display panel 2, on the display panel 2, show the electric quantity information through display screen 3, make things convenient for people to look over, the electric quantity information type of changeable demonstration through button 4, and set up the corresponding parameter of instrument, work in suitable temperature environment in order to guarantee watchcase 1 inside electronic components, utilize ventilation mechanism to keep watchcase 1 inside and outside intercommunication, be convenient for hot-air in watchcase 1 distributes away in order to reach and reduce watchcase 1 inside temperature, when having the dust to pile up in watchcase 1, can absorb the back with the dust in watchcase 1 through dust absorption mechanism, discharge watchcase 1 outside, thereby be convenient for the heat on watchcase 1 inside electronic components surface distributes, be convenient for keep ventilating, make electronic components work in suitable ambient temperature, improve the practicality of radiating efficiency and equipment.

As shown in fig. 3-4, the ventilation mechanism comprises a reciprocating assembly, a reciprocating plate 5 and a plurality of ventilation assemblies, the reciprocating assembly is positioned on one side of the reciprocating plate 5, the ventilation assemblies are uniformly distributed on the other side of the reciprocating plate 5 from top to bottom, the reciprocating assembly is in transmission connection with the reciprocating plate 5, the ventilation assemblies comprise ventilation holes, a first motor 6, a first driving shaft 7 and two ventilation units, the ventilation holes are arranged on the inner wall of the watchcase 1, the first motor 6 is fixed on the reciprocating plate 5, the first motor 6 is electrically connected with the PLC, the first motor 6 is in transmission connection with the first driving shaft 7, the two ventilation units are respectively positioned on two sides of the first driving shaft 7, the ventilation units comprise a spring 8, a dredging block 9 and two limiting units, the dredging block 9 is connected with the first driving shaft 7 through the spring 8, the two limiting units are respectively positioned on two sides of the spring 8, the spring 8 is in a compressed state;

in the ventilation mechanism, the ventilation hole is arranged on the inner wall of the watchcase 1, be convenient for the inside and outside air circulation of the watchcase 1, thereby facilitating the heat dissipation, and achieving the purpose of maintaining the low temperature inside the watchcase 1, when dust is adhered to the inner wall of the ventilation hole, the air circulation is easily influenced, at the moment, the PLC controls the reciprocating assembly to operate, drive the reciprocating plate 5 to move a certain distance to the ventilation hole, one side of the dredging block 9 of the ventilation unit, which is far away from the first driving shaft 7, is abutted against the inner wall of the ventilation hole, then the PLC controls the first motor 6 to start, drive the first driving shaft 7 to rotate, drive the dredging block 9 to rotate along the axis of the first driving shaft 7, the dredging block 9 adsorbs the dust on the ventilation hole, then the reciprocating assembly drives the reciprocating plate 5 to continue to move to the ventilation hole, after the dredging block 9 is separated from the, make when dredging block 9 pivoted, dredging block 9 surface adsorption's dust receives centrifugal force effect to influence, breaks away from dredging block 9, and then the subassembly that reciprocates drives reciprocating plate 5 and keeps away from the ventilation hole for dredging block 9 gets into watchcase 1 inside.

As shown in fig. 2 and 5, the dust suction mechanism includes an ash discharge pipe 10, a fan 11, a cover plate 12, a second motor 13, a rotating plate 14, a driving assembly, two dust suction assemblies and two orientation assemblies, the ash discharge pipe 10 is fixed on the top of the watchcase 1, the fan 11 is fixed in the ash discharge pipe 10, the cover plate 12 is arranged on the top end of the ash discharge pipe 10, the two orientation assemblies are respectively located on two ends of the cover plate 12, the second motor 13 is fixed in the watchcase 1, the second motor 13 and the fan 11 are both electrically connected with the PLC, the second motor 13 is in transmission connection with the rotating plate 14, the driving assembly is located below the rotating plate 14, the two dust suction assemblies are respectively located on two sides of the driving assembly, the dust suction assemblies include a moving plate 37, a dust suction hood 15, a connecting pipe 16 and two telescopic units, two ends of the moving plate 37 are respectively connected with the driving assembly through the two telescopic units, the utility model discloses a dust exhaust pipe, including dust hood 15, connecting pipe 16, telescopic unit, movable plate 37, dust hood 15 fixes the below at movable plate 37, the one end and the dust hood 15 intercommunication of connecting pipe 16, the other end setting of connecting pipe 16 is in the bottom of dust exhaust pipe 10, telescopic unit includes expansion bracket 17 and two first connecting rods 18, the both sides of the one end of expansion bracket 17 are articulated with movable plate 37 through two first connecting rods 18 respectively, the other end and the drive assembly of expansion bracket 17 are connected.

When dust in the watchcase 1 is more and heat dissipation of electronic components in the watchcase 1 is affected, the PLC controls the fan 11 in the dust exhaust pipe 10 to operate to generate an upward flowing air flow, the cover plate 12 is jacked up along a vertical direction under the action of the orientation unit to communicate the dust exhaust pipe 10 with the outside, and simultaneously, along with the flow of the air flow, pressure in the dust hood 15 is reduced to enable the dust hood 15 to adsorb dust below, the dust enters the dust exhaust pipe 10 through the connecting pipe 16 along with the flow of the air and is then exhausted outside from the dust exhaust pipe 10, in order to expand a dust absorption range, the PLC controls the second motor 13 to start to drive the rotating plate 14 to rotate, so that the dust hood 15 below is rotated, and meanwhile, a driving component below the rotating plate 14 operates to act on the telescopic frame 17 of the telescopic unit, so that the length of the telescopic frame 17 changes, and the moving plate 37 is driven to move by the two first connecting rods 18, thereby change the position of suction hood 15 for suction hood 15 inhales the ash everywhere in to watchcase 1, and through inhaling the ash with the dust from arranging ash pipe 10 discharge, after fan 11 stall, the air current stops flowing, apron 12 loses the holding power, falls on the top of arranging ash pipe 10 by the influence of gravity, plugs up ash pipe 10, avoids outside dust to get into in arranging ash pipe 10.

As shown in fig. 3, the reciprocating assembly comprises a third motor 19, a second connecting rod 20, a third connecting rod 21 and a fourth connecting rod 22, wherein the third motor 19 is fixed in the watch case 1, the third motor 19 is electrically connected with the PLC, the third motor 19 is in transmission connection with the second connecting rod 20, the second connecting rod 20 is hinged with one end of the fourth connecting rod 22 through the third connecting rod 21, and the other end of the fourth connecting rod 22 is fixedly connected with the reciprocating plate 5.

The PLC controls the third motor 19 to start, drives the second connecting rod 20 to rotate, and the second connecting rod 20 acts on the fourth connecting rod 22 through the third connecting rod 21, so that the fourth connecting rod 22 pushes or pulls the reciprocating plate 5 to translate.

Preferably, in order to realize the smooth movement of the reciprocating plate 5, a sliding rod 23 and a sliding ring 24 are respectively arranged on the upper side and the lower side of the fourth connecting rod 22, the sliding rod 23 is fixedly connected with the reciprocating plate 5, the sliding ring 24 is fixed in the watch case 1, and the sliding ring 24 is sleeved on the sliding rod 23. When the reciprocating plate 5 moves, the sliding rod 23 is driven to move, and the sliding rod 23 passes through the sliding ring 24 at a fixed position, so that the moving direction of the sliding rod 23 is fixed, and the reciprocating plate 5 can move stably.

Preferably, in order to fix the relative position of the dredging block 9 and the first driving shaft 7, the limiting unit comprises a limiting block 25, a limiting rod 26, a limiting ring 27 and two brackets 28, the limiting block 25 is fixedly connected with the dredging block 9 through the limiting rod 26, the two brackets 28 are respectively located at two sides of the limiting ring 27, the limiting ring 27 is fixedly connected with the first driving shaft 7 through the brackets 28, and the limiting ring 27 is sleeved on the limiting rod 26. When reciprocating plate 5 drives first motor 6 and removes, first drive shaft 7 removes, drive spacing ring 27 through support 28 and remove, spacing ring 27 is used in gag lever post 26, make gag lever post 26 drive mediation piece 9 carry out synchronous removal, and when first drive shaft 7 rotates, drive support 28 and spacing ring 27 and rotate, spacing ring 27 is used in gag lever post 26, make gag lever post 26 drive mediation piece 9 carry out synchronous rotation, thereby the relative position of mediation piece 9 and first drive shaft 7 has been fixed.

Preferably, in order to facilitate the dredging block 9 to get in and out of the vent hole, the vertical section of the dredging block 9 is shaped like an isosceles trapezoid, and the bottom edge of the isosceles trapezoid of the dredging block 9 is connected with the first driving shaft 7 through a spring 8. Along with the removal of first drive shaft 7, mediation piece 9 removes, and in the vertical cross-section of mediation piece 9, the waist of isosceles body type cross-section and the inner wall contact in ventilation hole are convenient for mediation piece 9 business turn over ventilation hole.

As shown in fig. 5, the driving assembly includes a fourth motor 29 and two driving units, the fourth motor 29 is electrically connected with the PLC, the two driving units are respectively located at two sides of the fourth motor 29, the driving units correspond to the telescopic units one by one, the driving units include a bearing 30, a screw rod 31 and a driving block 32, the fourth motor 29 and the bearing 30 are both fixed below the rotating plate 14, the fourth motor 29 is in transmission connection with one end of the screw rod 31, the other end of the screw rod 31 is arranged in the bearing 30, the driving block 32 is sleeved on the screw rod 31, a connection part of the driving block 32 and the screw rod 31 is provided with a thread matched with the screw rod 31, and the bearing 30 and the driving block 32 are respectively hinged with two sides of one end of the telescopic frame 17, which is far away from the moving plate 37.

Preferably, in order to prevent moving plate 37 from touching the inner wall of watch case 1, distance sensors 33 are provided at both ends of moving plate 37 on the side away from telescopic frame 17, and distance sensors 33 are electrically connected to PLC. The distance between the moving plate 37 and the inner wall of the watch case 1 is detected by the distance sensor 33, the distance data is transmitted to the PLC, and the PLC determines the position of the moving plate 37 according to the distance data to avoid the moving plate 37 from touching the inner wall of the watch case 1.

Preferably, in order to detect the temperature in the watch case 1, a temperature sensor 34 is arranged in the watch case 1, and the temperature sensor 34 is electrically connected with the PLC. Utilize temperature sensor 34 to detect the inside temperature of watchcase 1 to give PLC with temperature data transfer, when temperature data was too high, PLC controlled ventilation mechanism and inhale the ash mechanism operation, strengthened inside and outside ventilation of watchcase 1, improved the radiating efficiency.

Preferably, in order to fix the moving direction of the cover plate 12, the orientation component comprises a fixing block 35 and a fixing rod 36, the fixing block 35 is fixed above the watch case 1 through the fixing rod 36, and the cover plate 12 is sleeved on the fixing rod 36. The moving direction of the cover plate 12 is fixed by the fixing rods 36, and the moving range of the cover plate 12 is limited by the fixing blocks 35, preventing the cover plate 12 from being separated from the fixing rods 36.

Preferably, the first motor 6 is a dc servo motor in order to ensure the driving force of the first motor 6 by utilizing the characteristic that the driving force of the dc servo motor is strong.

When the electric power meter operates, the inside and the outside of the meter shell 1 are ventilated by the ventilation holes so as to radiate the heat inside the meter shell 1, the reciprocating component can drive the reciprocating plate 5 to move, the dust on the inner wall of the ventilation hole is removed by the rotation and the movement of the dredging block 9, the ventilation is enhanced, and the second motor 13 drives the rotating plate 14 to rotate, so that the dust hood 15 rotates, the driving component acts on the telescopic unit, so that the moving plate 37 drives the dust hood 15 to move, the dust hood 15 adsorbs surrounding dust, the dust in the watchcase 1 is conveniently discharged from the watchcase 1 through the connecting pipe 16 and the dust discharging pipe 10, heat of electronic components in the watchcase 1 is conveniently dissipated, in order to reach the purpose of cooling, make the inside electronic components work in suitable temperature environment of watchcase 1 to the life of instrument has been prolonged, the practicality of equipment has been improved.

Compared with the prior art, this electric power instrument convenient to ventilation cooling is convenient for keep the inside and outside circulation of air of watchcase 1 through the ventilation hole in the ventilation mechanism, and utilize the removal and the rotation of mediation piece 9 to get rid of the dust around the ventilation hole, further strengthen the ventilation, compare with current ventilation mechanism, this ventilation mechanism ventilation efficiency is higher, moreover, absorb the inside dust of watchcase 1 and discharge through inhaling grey mechanism, be convenient for the inside electronic components's of watchcase 1 heat gives off, in order to reach the purpose of cooling, thereby prolong the life of instrument, improve equipment's practicality, compare with current dust absorption mechanism, this dust absorption mechanism has enlarged the coverage through the removal and the rotation of suction hood 15.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The electric power instrument convenient for ventilation and heat dissipation is characterized by comprising a meter shell (1) and a display board (2), wherein the display board (2) is fixedly connected with the meter shell (1), the meter shell (1) is provided with a display screen (3) and a plurality of keys (4), the meter shell (1) is internally provided with a PLC (programmable logic controller), a dust collection mechanism and two ventilation mechanisms, the display screen (3) and the keys (4) are electrically connected with the PLC, and the two ventilation mechanisms are respectively positioned on two sides of the dust collection mechanism;

the ventilation mechanism comprises a reciprocating assembly, a reciprocating plate (5) and a plurality of ventilation assemblies, the reciprocating assembly is located on one side of the reciprocating plate (5), the ventilation assemblies are evenly distributed on the other side of the reciprocating plate (5) from top to bottom, the reciprocating assembly is in transmission connection with the reciprocating plate (5), each ventilation assembly comprises a ventilation hole, a first motor (6), a first driving shaft (7) and two ventilation units, the ventilation holes are formed in the inner wall of the watchcase (1), the first motor (6) is fixed on the reciprocating plate (5), the first motor (6) is electrically connected with the PLC, the first motor (6) is in transmission connection with the first driving shaft (7), the two ventilation units are located on two sides of the first driving shaft (7) respectively, each ventilation unit comprises a spring (8), a dredging block (9) and two limiting units, the dredging block (9) is connected with the first driving shaft (7) through the spring (8), the two limiting units are respectively positioned at two sides of the spring (8), and the spring (8) is in a compressed state;

dust absorption mechanism includes dust exhaust pipe (10), fan (11), apron (12), second motor (13), rotor plate (14), drive assembly, two dust absorption subassemblies and two directional subassemblies, dust exhaust pipe (10) are fixed at the top in watchcase (1), fan (11) are fixed in dust exhaust pipe (10), apron (12) set up the top in dust exhaust pipe (10), and two directional subassemblies are located the both ends of apron (12) respectively, second motor (13) are fixed in watchcase (1), second motor (13) and fan (11) all are connected with the PLC electricity, second motor (13) and rotor plate (14) transmission are connected, drive assembly is located the below of rotor plate (14), and two dust absorption subassemblies are located drive assembly's both sides respectively, dust absorption subassembly includes movable plate (37), suction hood (15), The dust collection device comprises a connecting pipe (16) and two telescopic units, wherein two ends of a moving plate (37) are respectively connected with a driving assembly through the two telescopic units, a dust collection cover (15) is fixed below the moving plate (37), one end of the connecting pipe (16) is communicated with the dust collection cover (15), the other end of the connecting pipe (16) is arranged at the bottom in an ash discharge pipe (10), each telescopic unit comprises a telescopic frame (17) and two first connecting rods (18), two sides of one end of each telescopic frame (17) are respectively hinged with the moving plate (37) through the two first connecting rods (18), and the other end of each telescopic frame (17) is connected with the driving assembly;

the reciprocating assembly comprises a third motor (19), a second connecting rod (20), a third connecting rod (21) and a fourth connecting rod (22), the third motor (19) is fixed in the watch case (1), the third motor (19) is electrically connected with the PLC, the third motor (19) is in transmission connection with the second connecting rod (20), the second connecting rod (20) is hinged with one end of the fourth connecting rod (22) through the third connecting rod (21), and the other end of the fourth connecting rod (22) is fixedly connected with the reciprocating plate (5);

the limiting unit comprises a limiting block (25), a limiting rod (26), a limiting ring (27) and two supports (28), the limiting block (25) is fixedly connected with the dredging block (9) through the limiting rod (26), the two supports (28) are respectively positioned on two sides of the limiting ring (27), the limiting ring (27) is fixedly connected with the first driving shaft (7) through the supports (28), and the limiting ring (27) is sleeved on the limiting rod (26);

the driving component comprises a fourth motor (29) and two driving units, the fourth motor (29) is electrically connected with the PLC, the two driving units are respectively positioned at two sides of the fourth motor (29), the driving units correspond to the telescopic units one by one, each driving unit comprises a bearing (30), a screw rod (31) and a driving block (32), the fourth motor (29) and the bearing (30) are both fixed below the rotating plate (14), the fourth motor (29) is in transmission connection with one end of a screw rod (31), the other end of the screw rod (31) is arranged in a bearing (30), the driving block (32) is sleeved on the screw rod (31), a connecting part of the driving block (32) and the screw rod (31) is provided with a thread matched with the screw rod (31), the bearing (30) and the driving block (32) are respectively hinged with two sides of one end, far away from the moving plate (37), of the telescopic frame (17);

the orientation assembly comprises a fixing block (35) and a fixing rod (36), the fixing block (35) is fixed above the watch case (1) through the fixing rod (36), and the cover plate (12) is sleeved on the fixing rod (36).

2. The electric power meter convenient for ventilation and heat dissipation of claim 1, wherein the fourth connecting rod (22) is provided with a sliding rod (23) and a sliding ring (24) on the upper and lower sides, the sliding rod (23) is fixedly connected with the reciprocating plate (5), the sliding ring (24) is fixed in the watch case (1), and the sliding ring (24) is sleeved on the sliding rod (23).

3. The electric meter convenient for ventilation and heat dissipation as defined in claim 1, wherein the vertical section of the dredging block (9) is shaped as an isosceles trapezoid, and the bottom edge of the isosceles trapezoid of the dredging block (9) is connected with the first driving shaft (7) through a spring (8).

4. The electric meter convenient for ventilation and heat dissipation of claim 1, wherein both ends of one side of the moving plate (37) far away from the telescopic frame (17) are provided with distance sensors (33), and the distance sensors (33) are electrically connected with the PLC.

5. Electric meter facilitating ventilation and heat dissipation according to claim 1, characterised in that a temperature sensor (34) is arranged in the case (1), said temperature sensor (34) being electrically connected to the PLC.

6. Electric meter facilitating ventilation and heat dissipation according to claim 1, characterised in that the first electric motor (6) is a dc servo motor.