CN118198904A - An automatic tracking and compensation device for arc suppression coil - Google Patents

Abstract

The present invention relates to an arc extinguishing coil automatic tracking compensation device in the field of electric power safety technology, comprising a cabinet, a mounting frame is provided in the inner cavity of the cabinet, and the mounting frame is installed with an arc extinguishing coil, a damping resistor box, an on-load switch and a grounding transformer, the upper sections of the two side walls of the cabinet are provided with air inlets, and an air inlet structure is provided at the air inlet, and an exhaust mechanism is provided on the top of the cabinet; the arrangement of the air inlet structure in the present invention can remove dust and dehumidify the gas entering the inner cavity of the cabinet through a sintered plate assembly and a dehumidification plate, so as to meet the requirements of the arc extinguishing coil, the damping resistor box, the on-load switch and the grounding transformer for humidity and floating dust.

Description

An automatic tracking and compensation device for arc suppression coil

Technical Field

The invention relates to the technical field of electric power safety, and in particular to an automatic tracking and compensation device for an arc extinguishing coil.

Background technique

Distribution network generally refers to a power grid with a voltage level of 35kV or below, which is used to supply electricity to various distribution stations and various power loads in the city. At present, most cities in my country use a 10kV voltage level to supply electricity to users. However, in the long-term construction of power grids, 10kV distribution networks have not received enough attention, which to a certain extent has led to a lot of randomness in the development of distribution networks, resulting in complex distribution network lines, unreasonable structures, insufficient design capacity, limited line load capacity, and easy overload.

The 10kV distribution system is located at the end of the power system and is responsible for directly supplying power to users. The distribution lines are widely distributed, with a long total length and a harsh operating environment, which seriously threatens the safety and reliability of power supply. Common faults include single-phase grounding faults, phase-to-phase short circuit faults, line break faults, or complex faults that include two or more of the above faults. When the capacitive current of a single-phase grounding fault exceeds a certain limit, it is necessary to introduce a tracking compensation device (mainly including a cabinet and an arc extinguishing coil, a damping resistor box, an on-load switch, a grounding transformer, etc.) to compensate for the excessive capacitive current. This can compensate the capacitive current to the maximum extent, reduce the arc burning degree at the fault point, and facilitate rapid arc extinguishing, thereby improving the safety of the distribution network during fault operation, and also reducing the overvoltage risk of primary equipment and the probability of phase-to-phase short circuit faults. It is of great significance to ensure the safety of the distribution network and the reliability of power supply.

However, some components in the tracking compensation device (arc suppression coil, damping resistor box, on-load switch, grounding transformer, etc.) have higher requirements for the environment than other equipment. Generally, they need to shield the floating dust, and also need to adjust the temperature and humidity in the cabinet to ensure the normal operation of the device. However, the existing electrical cabinets usually only have ventilation holes. Although they can achieve the effect of heat dissipation, they still need to be improved, and the control of floating dust and humidity is poor. For this reason, we designed an arc suppression coil automatic tracking compensation device.

Summary of the invention

In order to overcome the deficiencies in the background technology, the present invention discloses an arc extinguishing coil automatic tracking and compensation device.

In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

An arc suppression coil automatic tracking compensation device comprises a cabinet, wherein a mounting frame is provided in the inner cavity of the cabinet, and an arc suppression coil, a damping resistor box, an on-load switch and a grounding transformer are installed on the mounting frame, air inlets are provided on the upper sections of both side walls of the cabinet, and an air inlet structure is provided at the air inlet, and an exhaust mechanism is provided on the top of the cabinet;

The air inlet structure comprises an inner shell body arranged on the inner wall of the cabinet and an outer shell body arranged on the outer wall of the cabinet and open at the lower end, the bottom of the inner shell body is provided with a tapered air outlet facing the middle of the cabinet; the outer shell body is arranged opposite to the inner shell body, and the inner upper section is connected with the outer upper section of the inner shell body through the air inlet; the inner cavity of the outer shell body is provided with a grid and a sintered plate assembly in sequence from bottom to top; double-track slide rails are provided on both sides of the air inlet, and the two slide rails in the double-track slide rails are respectively slidably connected with a dehumidification plate and a wind shield plate; a wire wheel is provided on the side wall of the cabinet body above the air inlet, and the top of the dehumidification plate and the top of the wind shield plate are correspondingly connected by a connecting rope that passes around the wire wheel;

Wherein, a trigger switch is provided at the position of the wind shield plate corresponding to the top of the air inlet or at the position of the dehumidification plate corresponding to the bottom of the air inlet, and the trigger switch is connected to the exhaust mechanism signal.

Preferably, the inner cavity of the inner shell is provided with a resistance heating wire connected to the trigger switch signal.

Preferably, a front section of one of the tapered air outlets and a rear section of the other tapered air outlet are both provided with an air collecting hood facing the middle of the cabinet.

Preferably, a rotating shaft is rotatably connected to the middle part of the inner bottom surface of the cabinet body, and a plurality of windward plates are arranged around the shaft body of the rotating shaft located above the inner bottom surface of the cabinet body, so as to facilitate the rotation of the rotating shaft under the action of the airflow discharged by the wind collecting hood, and a plurality of fan blades are arranged around the shaft body of the rotating shaft located above the windward plate.

Preferably, the exhaust mechanism includes an air outlet tube arranged in the middle of the top surface of the cabinet, a fan is provided at the bottom of the air outlet tube, a top plate coaxial with the air outlet tube is provided above the air outlet tube, the diameter of the top plate is larger than the diameter of the air outlet tube, and a lower flange is provided on the outer edge of the top plate.

Preferably, the sintering plate assembly comprises a lower limiter, a mounting frame and an upper limiter which are sequentially arranged in the inner cavity of the outer shell from bottom to top, the lower limiter and the mounting frame are provided with springs, the inner cavity of the mounting frame is provided with a plurality of sintering plates at intervals along its length direction, and two adjacent sintering plates have an air inlet channel;

A flexible sealing structure is arranged between the installation frame and the outer shell.

Preferably, the air inlet channel has at least one expansion area.

Preferably, a rotating rod is rotatably connected to the inner cavity of the outer shell corresponding to a position above the installation frame, and the rotating rod body is provided with a knocking rod capable of knocking the installation frame.

Due to the adoption of the above-mentioned technical solution, the present invention has the following beneficial effects:

1. The air inlet structure can remove dust and dehumidify the gas entering the cabinet cavity through the sintered plate assembly and the dehumidification plate, so as to meet the humidity and floating dust requirements of the arc extinguishing coil, damping resistor box, on-load switch and grounding transformer;

2. The setting of the tapered air outlet and the wind collecting hood ensures that the gas entering the inner cavity of the cabinet has a certain flow rate and part of the airflow forms convection to fully blow air to the components in the inner cavity of the cabinet;

3. The setting of the expansion area in the air inlet channel of the sintering plate assembly makes the air flow in the air inlet channel form a swirl, which is conducive to the adsorption of dust in the air flow by the sintering plate, thereby improving the dust removal effect;

4. The setting of the rotating shaft can rotate in the staggered airflow discharged by the two wind collecting covers, and produce the function of blowing to the bottom of the components in the cabinet, further improving the heat dissipation effect of the components;

5. The setting of the trigger switch and the connecting rope can control the fan to run in reverse and dry the dehumidifier when the dehumidifier plate absorbs enough moisture, so that the dehumidifier plate can restore its dehumidification capacity.

BRIEF DESCRIPTION OF THE DRAWINGS

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

FIG2 is a rear view schematic diagram of the structure of the present invention;

FIG3 is a schematic diagram of the structure of the present invention in another state;

Fig. 4 is a cross-sectional view of the present invention;

FIG5 is a partial enlarged view of FIG4;

FIG. 6 is a cross-sectional view of the air inlet structure of the present invention.

In the figure: 1, cabinet; 11, mounting frame; 12, air inlet; 13, reel; 2, arc suppression coil; 3, damping resistor box; 4, on-load switch; 5, grounding transformer; 6, air inlet structure; 61, inner shell; 611, tapered air outlet; 612, resistance heating wire; 613, wind condenser; 62, outer shell; 621, grid; 622, sintering plate assembly; 6221, lower limit member; 6222, mounting frame; 6223, upper limit member; 6224, spring; 6225, sintering plate; 623, double-track slide rail; 625, dehumidification plate; 626, wind shield; 628, rotating rod; 629, knocking rod; 7, exhaust mechanism; 71, air outlet; 72, fan; 73, top plate; 731, lower flange; 8, rotating shaft; 81, windward plate; 82, fan blade; 9, connecting rope.

Detailed ways

The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

Embodiment 1, in conjunction with Figures 1-6, an arc suppression coil automatic tracking compensation device comprises a cabinet 1, a mounting frame 11 is provided in the inner cavity of the cabinet 1, and the mounting frame 11 is installed with an arc suppression coil 2, a damping resistor box 3, a load switch 4 and a grounding transformer 5, an air inlet 12 is provided on the upper section of both side walls of the cabinet 1, and an air inlet structure 6 is provided at the air inlet 12, and an exhaust mechanism 7 is provided on the top of the cabinet 1;

The air inlet structure 6 comprises an inner shell 61 arranged on the inner wall of the cabinet 1 and an outer shell 62 arranged on the outer wall of the cabinet 1 and open at the lower end, and the bottom of the inner shell 61 is provided with a tapered air outlet 611 facing the middle of the cabinet 1; the outer shell 62 is arranged opposite to the inner shell 61, and the inner upper section is connected with the outer upper section of the inner shell 61 through the air inlet 12; the inner cavity of the outer shell 62 is provided with a grid 621 and a sintered plate assembly 622 in sequence from bottom to top; double-track slide rails 623 are provided on both sides of the air inlet 12, and the two slide rails in the double-track slide rails 623 are respectively slidably connected with a dehumidification plate 625 and a wind shield 626; a wire wheel 13 is provided on the side wall of the cabinet 1 above the air inlet 12, and the top of the dehumidification plate 625 and the top of the wind shield 626 are correspondingly connected by a connecting rope 9 that passes around the wire wheel 13;

Among them, a trigger switch is provided at the position of the wind shield plate 626 corresponding to the top of the air inlet 12 or the position of the dehumidification plate 625 corresponding to the bottom of the air inlet 12, and the trigger switch is connected to the exhaust mechanism 7 by signal.

It should be noted that the cross-sectional area of the tapered air outlet 611 gradually decreases as it approaches the outlet, so that the gas discharged from the inner shell 61 to the inner cavity of the cabinet 1 has a mobile fluidity;

It should be noted that the double-track slide rail 623 has two slides, one of which is slidably connected to a dehumidification plate 625, and the other is slidably connected to a wind shield 626; under normal conditions, the wind shield 626 is located at the lower section of the corresponding slide, and the dehumidification plate 625 is located at the upper section of the corresponding slide; that is, under normal conditions, when gas flows through the inside of the air inlet structure 6, it needs to be dehumidified by the dehumidification plate 625.

It should be noted that the weight of the wind shield plate 626 is greater than the weight of the dehumidification plate 625, and is less than the weight of the dehumidification plate 625 when it is about to be saturated with adsorbed moisture.

It should be noted that the cabinet body 1 has a sealed cabinet door, that is, after the cabinet door is closed, the cabinet door and the cabinet body 1 are sealed.

Furthermore, the exhaust mechanism 7 has a fan 72; as required, the fan 72 adopts a forward and reverse fan, that is, the fan 72 can run in a forward direction to exhaust air, and can also run in a reverse direction to take in air.

In this arrangement, when the fan 72 in the exhaust mechanism 7 runs in the forward direction, the fan 72 draws hot gas from the inner cavity of the cabinet 1. At this time, the inner cavity of the cabinet 1 is in a negative pressure state, and the external gas passes through the grid 621, the sintered plate assembly 622 and the dehumidification plate 625 in the air inlet structure 6, and then is accelerated by the tapered air outlet 611, and then enters the inner cavity of the cabinet 1, thereby realizing the functions of heat dissipation, dehumidification and dust prevention for the inner cavity of the cabinet 1.

As required, the tapered air outlet 611 faces the heat generating components installed inside the cabinet 1 , such as the arc suppression coil 2 , the damping resistor box 3 , the on-load switch 4 or the grounding transformer 5 .

Due to the arrangement of the sintering plate assembly 622 , the sintering plate assembly 622 can absorb dust in the airflow to achieve a dust-proof effect; as needed, a dust-proof filter can be further arranged above the sintering plate assembly 622 .

In this way, when the dehumidification plate 625 is saturated with adsorbed moisture, the weight of the dehumidification plate 625 is greater than the weight of the wind shield 626. At this time, the dehumidification plate 625 drops and the wind shield 626 rises. At this time, the dehumidification plate 625 or the wind shield 626 squeezes the trigger switch, and the trigger switch causes the fan 72 in the exhaust mechanism 7 to run in the reverse direction. The above-mentioned gas flows in the reverse direction (the cold gas from the outside enters the cabinet 1, and the hot gas from the cabinet 1 is discharged to the outside through the air inlet structure 6). The hot gas from the cabinet 1 has a drying effect on the dehumidification plate 625, so that the dehumidification plate 625 restores its dehumidification capacity.

Furthermore, in order to quickly restore the dehumidification capacity of the dehumidification plate 625, a resistance heating wire 612 connected to the trigger switch signal is provided in the inner cavity of the inner shell 61; specifically, after the trigger switch is triggered, the resistance heating wire 612 is energized to generate heat, and after the trigger switch is not triggered, the resistance heating wire 612 is in a power-off state.

As required, the sintering plate assembly 622 includes a lower stopper 6221, a mounting frame 6222 and an upper stopper 6223 which are sequentially arranged in the inner cavity of the outer shell 62 from bottom to top. The lower stopper 6221 and the mounting frame 6222 are provided with springs 6224. The inner cavity of the mounting frame 6222 is provided with a plurality of sintering plates 6225 at intervals along its length direction, and two adjacent sintering plates 6225 have an air inlet channel.

A flexible sealing structure 6226 is provided between the mounting frame 6222 and the outer shell 62 .

It should be noted that two adjacent sintering plates 6225 are arranged opposite to each other with a small gap therebetween; the gap is 3-5 mm as required.

When the airflow passes through the air inlet channel in this way, the characteristics of the sintered plate 6225 are utilized to adsorb the dust in the airflow, thereby achieving the dust removal effect.

Furthermore, the air inlet channel has at least one expansion zone; as needed, the width of the expansion zone is 5~10mm; when the air flow expansion zone is set in the air inlet channel, not only the flow rate of the air flow can be reduced, but also the air flow can form a vortex, which is more conducive to the sintering plate 6225 to absorb dust in the air flow and improve the dust removal effect; as needed, the sintering plate 6225 is a folding plate arranged up and down.

According to the needs, the inner cavity of the outer shell 62 is rotatably connected to a rotating rod 628 corresponding to the position above the installation frame 6222, and the rotating rod 628 is provided with a knocking rod 629 capable of knocking the installation frame 6222; wherein the rotating rod 628 can be driven by a motor;

The rotation of the rotating rod 628 is arranged in this way to drive the rotating rod 628 to rotate, and the rotating rod 628 drives the knocking rod 629 to move in a circle. The outer end of the knocking rod 629 knocks the mounting frame 6222. Under the action of the spring 6224, the mounting frame 6222 can move downward to ensure the positive rotation of the rotating rod 628. At the same time, the mounting frame 6222 drives the sintering plate 6225 to vibrate, and the dust on the sintering plate 6225 can be dropped by the vibration, thereby achieving the function of automatically cleaning the sintering plate 6225.

Embodiment 2, in combination with Figures 1-4, an arc suppression coil automatic tracking and compensation device, based on Embodiment 1, in order to further accelerate the cooling effect of the arc suppression coil 2, the damping resistor box 3, the on-load switch 4 and the grounding transformer 5, the two tapered air outlets 611 are both provided with a wind collecting hood 613 facing the middle of the cabinet 1.

According to needs, the fast arc extinguishing coil 2, the damping resistor box 3, the on-load switch 4 and the grounding transformer 5 are arranged in an inverted triangle structure.

It should be noted that: the direction of the gas discharged from the wind hood 613 is toward the bottom of the mounting frame 11, that is, the gas discharged from the wind hood 613 will not be directly blown toward the electrical components of the cabinet 1; the gas discharged directly into the inner cavity of the cabinet 1 through the tapered air outlet 611 is directly blown toward the electrical components, thereby dissipating the heat from the sides of the electrical components, and the gas discharged into the inner cavity of the cabinet 1 by the wind hood 613 is blown toward the bottom of the electrical components, so that the two airflows are convective, meet below the electrical components, and then disperse, thereby realizing the function of blowing air to the bottom surface of the electrical components, thereby enabling the electrical components to fully receive the cold gas and improve the heat dissipation efficiency.

Embodiment 3, in combination with Figures 1-6, an arc suppression coil automatic tracking compensation device is provided, based on Embodiment 2, wherein a front section of one tapered air outlet 611 and a rear section of another tapered air outlet 611 are both provided with an air collecting hood 613 facing the middle of the cabinet 1.

Furthermore, a rotating shaft 8 is rotatably connected to the middle part of the inner bottom surface of the cabinet body 1, and a plurality of windward plates 81 are arranged around the rotating shaft 8 at a position above the inner bottom surface of the cabinet body 1, so as to facilitate the rotation of the rotating shaft 8 under the action of the airflow discharged from the wind collecting hood 612, and a plurality of fan blades 82 are arranged around the rotating shaft 8 at a position above the windward plate 81.

This arrangement allows the airflow discharged from the two wind collecting hoods 613 to blow toward the windward plate 81 on the rotating shaft 8 in an offset manner, so that the rotating shaft 8 drives the fan blades 82 to rotate, causing the fan blades 82 to generate upward airflow, further enhancing the heat dissipation effect on the electrical components.

In this embodiment, the rotating rod 628 can also be driven by the rotating shaft 8 instead of the motor; specifically, the lower end of the rotating shaft 8 passes through the bottom plate of the cabinet 1 and is connected to a transmission rod through a gear. The transmission rod is driven and connected to the rotating rod 628, so that the rotating shaft 8 drives the rotating rod 628, thereby realizing the function of knocking the installation frame 6222.

The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims (8)

1. The utility model provides an arc suppression coil automatic tracking compensation arrangement, includes the cabinet body (1), cabinet body (1) inner chamber is equipped with mounting bracket (11), and mounting bracket (11) install arc suppression coil (2), damping resistance box (3), on-load switch (4) and grounding transformer (5), its characterized in that: the upper sections of the two side walls of the cabinet body (1) are provided with air inlets (12), an air inlet structure (6) is arranged at the air inlet (12), and an air exhaust mechanism (7) is arranged at the top of the cabinet body (1);

The air inlet structure (6) comprises an inner shell (61) arranged on the inner wall of the cabinet body (1) and an outer shell (62) arranged on the outer wall of the cabinet body (1) and with an open lower end, and a tapered air outlet (611) facing the middle part of the cabinet body (1) is arranged at the bottom of the inner shell (61); the outer shell (62) is arranged opposite to the inner shell (61), and the inner upper section is communicated with the outer upper section of the inner shell (61) through the air inlet (12); the inner cavity of the outer shell (62) is sequentially provided with a grid (621) and a sintering plate assembly (622) from bottom to top; two sides of the air inlet (12) are provided with two slide rails (623), and two slide rails in the two slide rails (623) are respectively and slidably connected with a dehumidifying plate (625) and a wind shield (626); a wire wheel (13) is arranged at the position, above the air inlet (12), of the side wall of the cabinet body (1), and the top of the dehumidifying plate (625) and the top of the wind shield (626) are correspondingly connected through a connecting rope (9) which bypasses the wire wheel (13);

The position of the top of the air inlet (12) corresponding to the wind shield (626) or the position of the bottom of the air inlet (12) corresponding to the dehumidifying plate (625) is provided with a trigger switch, and the trigger switch is in signal connection with the air exhaust mechanism (7).

2. The automatic tracking and compensating device for arc suppression coil according to claim 1, wherein: and a resistance heating wire (612) connected with the trigger switch signal is arranged in the inner cavity of the inner shell (61).

3. The automatic tracking and compensating device for arc suppression coil according to claim 1, wherein: wherein, the front section of one convergent air outlet (611) and the rear section of the other convergent air outlet (611) are both provided with a wind gathering cover (613) facing the middle part of the cabinet body (1).

4. An automatic tracking and compensating device for arc suppression coil according to claim 3, wherein: the novel air conditioner is characterized in that a rotating shaft (8) is rotatably connected to the middle of the inner bottom surface of the cabinet body (1), a plurality of windward plates (81) are annularly arranged at the position, above the inner bottom surface of the cabinet body (1), of the shaft body of the rotating shaft (8), so that the rotating shaft (8) rotates under the action of air flow exhausted by the air collecting cover (612), and a plurality of fan blades (82) are annularly arranged at the position, above the windward plates (81), of the shaft body of the rotating shaft (8).

5. The automatic tracking and compensating device for arc suppression coil according to claim 1, wherein: the exhaust mechanism (7) comprises an air outlet cylinder (71) arranged in the middle of the top surface of the cabinet body (1), a fan (72) is arranged at the bottom of the air outlet cylinder (71), a top plate (73) coaxial with the air outlet cylinder (71) is arranged above the air outlet cylinder (71), the diameter of the top plate (73) is larger than that of the air outlet cylinder (71), and a downward flanging (731) is arranged at the outer edge of the top plate (73).

6. The automatic tracking and compensating device for arc suppression coil according to claim 1, wherein: the sintering plate assembly (622) comprises a lower limiting part (6221), a mounting frame (6222) and an upper limiting part (6223) which are sequentially arranged in an inner cavity of the outer shell (62) from bottom to top, the lower limiting part (6221) and the mounting frame (6222) are provided with springs (6224), the inner cavity of the mounting frame (6222) is provided with a plurality of sintering plates (6225) at intervals along the length direction of the inner cavity, and two adjacent sintering plates (6225) are provided with air inlet channels;

a flexible sealing structure (6226) is arranged between the mounting frame (6222) and the outer shell (62).

7. The automatic tracking and compensating device for arc suppression coil according to claim 6, wherein: the air inlet channel is provided with at least one expansion area.

8. The automatic tracking and compensating device for arc suppression coil according to claim 6, wherein: the inner cavity of the outer shell (62) is correspondingly positioned above the mounting frame (6222) and is rotationally connected with a rotating rod (628), and a rod body of the rotating rod (628) is provided with a knocking rod (629) which can knock the mounting frame (6222).