CN219536661U

CN219536661U - Second harmonic current suppression device

Info

Publication number: CN219536661U
Application number: CN202223419740.8U
Authority: CN
Inventors: 陈项孟
Original assignee: Nanjing Sukai Power Engineering Co ltd
Current assignee: Nanjing Sukai Power Engineering Co ltd
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-08-15
Anticipated expiration: 2032-12-20

Abstract

The utility model discloses a second harmonic current suppression device, which is characterized in that a heat radiation module is arranged on a shell and used for radiating heat of an inner cavity of the shell to reduce the working temperature of a suppressor main body, and the second harmonic current suppression device comprises a coiled pipe arranged at the bottom end of the suppressor main body, pipe orifices respectively arranged at the ends of the coiled pipe, pipe bodies symmetrically fixed at the top end of the shell and extending into the inner cavity of the shell, supporting rods fixed on the inner walls of the pipe bodies in an annular array, a motor arranged on the supporting rods, fan blades fixedly sleeved on a motor shaft and air inlet pipes symmetrically arranged on the opposite inner walls of the shell and extending out of the shell, wherein the coiled pipe is fixed at the bottom end of the suppressor main body and made of a material with strong heat conductivity, preferably copper, and is used for injecting cooling water to flow so as to facilitate the cooling water to absorb and take away heat absorbed by the coiled pipe from the suppressor main body.

Description

Second harmonic current suppression device

Technical Field

The utility model relates to the technical field of circuit suppression devices, in particular to a second harmonic current suppression device.

Background

In a DC power transmission system based on a grid commutation converter, two sides (a rectifying side and an inverting side) of the DC system are respectively connected with an AC system, and because of harmonic transmission phenomena of the DC system and the AC system, the power frequency negative sequence harmonic voltage of a typical AC system can generate 2 times of harmonic voltage on the DC side, and harmonic current caused by the 2 times of harmonic voltage on the DC side can generate 3 times of positive sequence harmonic current and power frequency negative sequence harmonic current in the AC system, so that harmonic current can be further generated, if the second harmonic current on a DC line needs to be restrained, a second harmonic current restraining signal can be added in a current command signal generated on the rectifying side through a current restraining device, and the input and output characteristics of the DC control system can be changed through changing a trigger angle of a conversion valve, thereby achieving the purposes of increasing the second harmonic damping of the DC system and reducing the second harmonic current.

The prior second harmonic current suppression device mainly has the following defects in the using process: the second harmonic current suppression device can produce higher temperature when working, easily influences the use and burns out the internal circuit, can accelerate the heat ageing of the spare part in the second harmonic suppression device simultaneously, reduces its life, mainly begins the ventilation hole to dispel the heat passively through its external shell body under the prior art, and radiating efficiency is lower, exists the improvement room.

Disclosure of Invention

The present utility model aims to solve one of the technical problems existing in the prior art or related technologies.

The technical scheme adopted by the utility model is as follows: a second harmonic current suppression device comprising: the main body module comprises a shell, a suppressor main body fixed on the inner wall of the shell and wiring terminals symmetrically arranged on the inner walls of two sides of the shell and extending out of the shell.

The heat radiation module comprises a coiled pipe arranged at the bottom end of the inhibitor main body, pipe orifices respectively arranged on the end parts of the coiled pipe, a pipe body symmetrically fixed at the top end of the shell and extending into the inner cavity of the shell, a supporting rod fixed on the inner wall of the pipe body in an annular array, a motor arranged on the supporting rod, fan blades fixedly sleeved on a motor shaft and an air inlet pipe symmetrically arranged on the opposite inner wall of the shell and extending out of the shell.

The present utility model may be further configured in a preferred example to: rectangular holes are formed in two sides of the shell.

The present utility model may be further configured in a preferred example to: the cross section of the coiled pipe is rectangular with rounded corners, and two ends of the coiled pipe are positioned on the same side of the shell and extend out of the shell.

The present utility model may be further configured in a preferred example to: the pipe orifice comprises a water inlet fixedly sleeved on one end of the coiled pipe and a water outlet fixedly sleeved on the other end of the coiled pipe.

The present utility model may be further configured in a preferred example to: the first filter screen is installed to the inner wall roof of body.

The present utility model may be further configured in a preferred example to: the air inlet pipe comprises a compression pipeline fixed on the inner wall of the rectangular hole on the shell and a second filter screen fixed on the inner wall of the compression pipeline.

The present utility model may be further configured in a preferred example to: the cross section of the compression pipeline is isosceles trapezoid.

By adopting the technical scheme, the beneficial effects obtained by the utility model are as follows:

1. according to the utility model, the tube body extending into the inner cavity of the shell is symmetrically arranged at the top end of the shell, the motor is arranged on the inner wall of the tube body through the supporting rod, the fan blades are fixedly sleeved on the motor shaft, meanwhile, rectangular holes are formed on two sides of the shell, the air inlet pipe is arranged on the inner wall of the rectangular holes, the fan blades are driven to rotate by the rotation of the motor to rotate by utilizing the principle that hot air rises and cold air falls down, hot air collected at the top of the inner cavity of the shell is discharged, then the external cold air is fed through the air inlet under the action of air pressure and blown to the inhibitor main body, heat generated by the inhibitor main body is taken away again, and then the heat is discharged again by the fan blades to form circulation, so that the heat generated by the second harmonic current inhibitor during working can be rapidly and effectively discharged, accumulation of the heat in the shell is avoided, and the heat dissipation efficiency is increased.

2. According to the utility model, the coiled pipe is arranged at the bottom end of the inhibitor main body, and the pipe orifice is arranged at the end part of the coiled pipe, so that when the inhibitor main body works, cooling water flows in the coiled pipe and absorbs and takes away heat on the inhibitor main body in a water cooling mode, thereby reducing the temperature of the inhibitor main body, avoiding thermal aging of parts caused by overhigh temperature of the inhibitor main body, prolonging the service life of the second harmonic current inhibitor and improving the practicality.

Drawings

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

FIG. 2 is a schematic cross-sectional view of the present utility model;

FIG. 3 is a schematic top view of a serpentine tube of the present utility model;

FIG. 4 is a schematic view of the bottom construction of a serpentine tube of the present utility model;

fig. 5 is a schematic view showing a part of a heat dissipation module according to the present utility model.

Reference numerals:

100. a main body module; 110. a housing; 111. a rectangular hole; 120. a suppressor body; 130. a connection terminal;

200. a heat dissipation module; 210. a serpentine tube; 220. a pipe orifice; 211. a water inlet; 212. a water outlet; 230. a tube body; 231. a first filter screen; 240. a support rod; 250. a motor; 260. a fan blade; 270. an air inlet pipe; 271. compressing the pipeline; 272. and a second filter screen.

Detailed Description

The objects, technical solutions and advantages of the present utility model will become more apparent by the following detailed description of the present utility model with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.

Some embodiments of the utility model are described below with reference to the accompanying drawings,

example 1:

as shown in fig. 1 to 5, the present embodiment provides a second harmonic current suppression device including: the main body module 100 and the heat dissipation module 200,

the main body module 100 includes a housing 110, a suppressor main body 120 fixed on an inner wall of the housing 110, and connection terminals 130 symmetrically installed on inner walls of two sides of the housing 110 and extending out of the housing 110, where the housing 110 is used for installing the suppressor main body 120, protecting the suppressor main body 120 from being damaged by external factors, the suppressor main body 120 is used for suppressing second harmonics in current, and the connection terminals 130 are connected with the suppressor main body 120 through wires and are used for being connected with external power lines, so that the current is conveniently transferred to the suppressor main body 120.

Further, rectangular holes 111 are opened at both sides of the case 110 for mounting the heat dissipation module 200.

The heat dissipation module 200 is installed on the housing 110, and is used for dissipating heat of the inner cavity of the housing 110, so as to reduce the working temperature of the suppressor body 120, and comprises a coiled pipe 210 installed at the bottom end of the suppressor body 120, pipe orifices 220 respectively installed on the end parts of the coiled pipe 210, a pipe body 230 symmetrically fixed at the top end of the housing 110 and extending into the inner cavity of the housing 110, a supporting rod 240 fixed on the inner wall of the pipe body 230 in an annular array, a motor 250 installed on the supporting rod 240, fan blades 260 fixedly sleeved on the shaft of the motor 250, and an air inlet pipe 270 symmetrically installed on the opposite inner wall of the housing 110 and extending out of the housing 110.

The serpentine tube 210 is fixed at the bottom end of the suppressor body 120, and the serpentine tube 210 is made of a material with strong thermal conductivity, preferably copper, and is used for injecting cooling water to flow, so that the cooling water can conveniently absorb and take away heat absorbed by the serpentine tube 210 from the suppressor body 120.

Further, the cross section of the coiled pipe 210 is rectangular with rounded corners, so as to increase the contact area with the suppressor body 120, thereby better absorbing heat on the suppressor body 120, and simultaneously facilitating the cooling water to absorb and take away more heat, and two ends of the coiled pipe 210 are positioned on the same side of the housing 110 and extend out of the housing 110, so as to facilitate connection with a water inlet pipeline and a water outlet pipeline.

The pipe orifice 220 comprises a water inlet 211 fixedly sleeved on one end of the coiled pipe 210 and a water outlet 212 fixedly sleeved on the other end of the coiled pipe 210, wherein the water inlet 211 is used for injecting cooling water into the inner cavity of the coiled pipe 210, and the water outlet 212 is used for discharging the cooling water after absorbing heat.

The tube body 230 is used for installing other components, the supporting rod 240 is fixed on the inner wall of the tube body 230 and used for installing the motor 250, maintaining the stability of the motor 250, the motor 250 is used for installing the fan blades 260 and driving the fan blades 260 to rotate, and the fan blades 260 rotate to discharge hot air at the top of the inner cavity of the shell 110 through the tube body 230.

Further, the first filter 231 is installed on the top wall of the inner wall of the tube 230, so as to prevent the external dust from entering the inner cavity of the housing 110 through the tube 230.

The air inlet pipe 270 is used for guiding external air into the inner cavity of the shell 110, the air inlet pipe 270 comprises a compression pipe 271 fixed on the inner wall of the rectangular hole 111 on the shell 110 and a second filter screen 272 fixed on the inner wall of the compression pipe 271, wherein the compression pipe 271 is flush with the bottom of the inhibitor main body 120, the cross section of the compression pipe 271 is in an isosceles trapezoid shape, so that the outlet of the compression pipe 271 is reduced, when the external air enters the inner cavity of the shell 110 through the compression pipe 271, the area of the outlet of the compression pipe 271 is reduced, the pressure of the external air is unchanged, the flow rate of the external air is increased, the external air is blown to the inhibitor main body 120, heat generated during operation of the inhibitor main body 120 can be taken away more quickly, and the second filter screen 272 is used for filtering air entering the inner cavity of the shell 110, so that dust is prevented from entering the inner cavity of the shell 110, and the cleanliness of the inner cavity of the shell 110 is kept.

The working principle and the using flow of the utility model are as follows: when the device is used, the power transmission line of the device is connected with the wiring terminals 130 on two sides of the shell 110, so that current enters the suppressor body 120 through the wiring terminals 130, the suppressor body 120 suppresses the second harmonic wave in the input current, then the processed current is sent out through the wiring terminals 130 on the other side, in the running process of the suppressor body 120, the motor 250 rotates to drive the fan blades 260 to rotate, the fan blades 260 rotate to discharge the hot air on the top of the inner cavity of the shell 110, at the moment, the air pressure of the inner cavity of the shell 110 is reduced, the outside air enters the compression pipeline 271 under the action of the atmospheric pressure, the outlet of the compression pipeline 271 is smaller, but the outside air pressure is kept unchanged, when the outside air enters the inner cavity of the shell 110 through the compression pipeline 271, the heat generated by the suppressor body 120 is taken away again by accelerating the suppressor body 120, then the heat generated by the suppressor body 120 is discharged again by the fan blades 260, circulation is formed, meanwhile, cooling water is injected into the coil 210 from the water inlet 211 to flow, the heat on the suppressor body 120 is transferred to the coil 210, the cooling water absorbs and takes away the heat on the coil 210, and then the temperature of the suppressor body 120 is discharged from the water outlet 212.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.

Claims

1. A second harmonic current suppression device comprising: the heat dissipation device comprises a main body module (100) and a heat dissipation module (200), and is characterized in that the main body module (100) comprises a shell (110), a suppressor main body (120) fixed on the inner wall of the shell (110) and wiring terminals (130) symmetrically arranged on the inner walls of two sides of the shell (110) and extending out of the shell (110);

the heat radiation module (200) comprises a coiled pipe (210) arranged at the bottom end of the inhibitor main body (120), pipe orifices (220) respectively arranged at the end parts of the coiled pipe (210), pipe bodies (230) symmetrically fixed at the top end of the shell (110) and extending into the inner cavity of the shell (110), supporting rods (240) fixed on the inner wall of the pipe bodies (230) in an annular array, a motor (250) arranged on the supporting rods (240), fan blades (260) fixedly sleeved on the shaft of the motor (250) and air inlet pipes (270) symmetrically arranged on the opposite inner walls of the shell (110) and extending out of the shell (110).

2. A second harmonic current suppressing device according to claim 1, wherein rectangular holes (111) are formed on both sides of the housing (110).

3. A second harmonic current suppressing device according to claim 1, wherein the cross section of the serpentine tube (210) is rectangular with rounded corners, and both ends of the serpentine tube (210) are located on the same side of the housing (110) and protrude outside the housing (110).

4. A second harmonic current suppressing device according to claim 1, wherein the nozzle (220) comprises a water inlet (211) fixedly connected to one end of the coiled tube (210) and a water outlet (212) fixedly connected to the other end of the coiled tube (210).

5. A second harmonic current suppressing device according to claim 1, wherein the inner wall top wall of the tube body (230) is provided with a first screen (231).

6. A second harmonic current suppressing apparatus according to claim 1, wherein the air inlet pipe (270) comprises a compression pipe (271) fixed to an inner wall of the rectangular hole (111) of the housing (110) and a second filter screen (272) fixed to an inner wall of the compression pipe (271).

7. A second harmonic current suppressing device according to claim 6, wherein said compression conduit (271) has a cross-section in the shape of an isosceles trapezoid.