CN107579464A - Labyrinth type dust control by ventilation shutter - Google Patents

Abstract

The labyrinth ventilating and dustproof louver disclosed by the present invention comprises a window, an air duct is arranged in the window, and an air vent is arranged at the upper end of the window, the air inlet end of the air vent communicates with the air outlet end of the air duct, and the ventilation The air outlet end of the outlet communicates with the inside of the prefabricated substation box, and the air inlet end is located at the lower part of the window and communicates with the outside of the prefabricated substation box. There are several downward-sloping baffles staggered in the ventilation channel. These baffles turn the ventilation channel into a labyrinth ventilation channel; at the bottom of the ventilation channel, there are inclined sand discharge boards and sand discharge outlets, and the sand on the sand discharge boards is discharged to the prefabricated substation box through the sand discharge outlets. external. The invention perfectly solves the problems of ventilation, heat dissipation and sand prevention of prefabricated cabins and opening and closing stations under high temperature and high dust environment, and has the following advantages: 1. Convenient manufacture, low process requirements; 2. Simple structure, remarkable functions, and cost-effective 3. No need for auxiliary power supply, energy saving and environmental protection; 4. Low operation and maintenance costs, easy to clean and replace.

Description

Labyrinth Ventilation and Dust-proof Shutters

technical field

The invention relates to the technical field of prefabricated substations and outdoor box-type opening and closing stations, in particular to labyrinth-type ventilation and dust-proof shutters used in preinstalled substations and outdoor box-type opening and closing stations.

Background technique

At present, the methods for solving the internal ventilation, cooling and dust prevention problems of prefabricated substations and switching stations mainly include:

1. Ordinary shutter method.

It effectively plays the role of ventilation and heat dissipation, and is widely used in areas without wind and sand. However, it is impossible to isolate the sand and dust in the high wind and sand area. The sand and dust will continue to enter the interior of the cabin under strong winds, affecting the internal switch cabinet components such as: operating mechanism, etc., making the internal switch cabinet unable to use normally.

2. The fully sealed cabin is equipped with an intelligent HVAC system.

This scheme adopts a fully sealed box structure, so there is no problem of sand entering the warehouse. Intelligent industrial air conditioners are used to control the temperature and humidity inside the cabin. It has certain disadvantages: 1. High cost; 2. The ventilation inside the cabin is not smooth, and the air is relatively turbid; 3. The performance requirements for intelligent industrial air conditioners are high. Once a failure occurs, the room temperature inside the cabin will inevitably rise, resulting in The internal equipment cannot be used normally; 4: The cost of operation and maintenance is high.

3. Conventional blinds plus filter and fan.

This method can effectively play the role of ventilation and heat dissipation, but it cannot effectively isolate sand and dust. The external fine dust will be sucked into the cabin through the filter screen under the action of the fan, thereby affecting the internal equipment. The filter screen is easy to clog after long-term operation. Once the filter screen is clogged, the internal heat dissipation will be blocked and the temperature will continue to rise, which will affect the normal operation of the equipment; the second will affect the life of the fan. It is necessary to clean the filter screen and check the fan frequently.

Contents of the invention

The technical problem to be solved by the present invention is to provide a labyrinth-type ventilation and protection system that does not require auxiliary power, is energy-saving and environmentally friendly, and aims at the deficiencies in the methods for solving the problems of internal ventilation, cooling and dust prevention in existing prefabricated substations and switching stations. Dust shutters.

The technical problem to be solved by the present invention can be realized by the following technical solutions:

The labyrinth ventilating and dustproof louver comprises a window, the inside of the window is provided with an air passage, and the upper end of the inside of the window is provided with an air vent, and the air inlet end of the air vent is connected with the outlet of the air passage. The air end is connected, the air outlet end of the vent is connected with the inside of the prefabricated substation box, the air inlet end of the air duct is located at the lower part of the window and is connected to the outside of the prefabricated substation or switchgear box It is connected, and it is characterized in that a number of downward-sloping blocking plates are arranged alternately in the air passage, and these blocking plates turn the air passage into a labyrinth air passage; A sand release plate and a sand release port, the sand on the sand release plate is discharged to the outside of the prefabricated substation or the switching station through the sand release port.

In a preferred embodiment of the present invention, louvers are arranged on the air inlet end of the air duct.

In a preferred embodiment of the present invention, the inclination angle of the blocking plate is 45°.

In a preferred embodiment of the present invention, a first removable filter screen and a second removable filter screen are respectively arranged at the air inlet end and the air outlet end of the air vent.

In a preferred embodiment of the present invention, the first removable filter screen and the second removable filter screen are equally divided into a first removable filter screen holder, a second removable filter screen frame and the first stainless steel filter installed on the first removable filter holder, and the second stainless steel filter installed on the second removable filter holder.

In a preferred embodiment of the present invention, the first stainless steel filter is a 100-mesh stainless steel filter, and the second stainless steel filter is a 200-mesh stainless steel filter.

Due to the adoption of the above technical scheme, the present invention further improves the structure of ordinary shutters. The ventilation channel adopts a labyrinth ventilation channel, and a blocking plate is set in the direction of sand and dust travel to reduce the wind pressure, and the part in the air is made larger by gravity. The dust falls on the layered baffle boards of each layer, and the baffle boards are designed to be inclined downward at a 45° angle. The wind carrying a small amount of fine dust passing through the labyrinth ventilation channel is filtered by a 2-layer filter and then enters the pre-installed substation box. The fine dust basically adheres to the filter. The filter is divided into 100 mesh and 2 pieces of 200 mesh, pressure-welded on the filter screen frame, the filter screen frame is a removable structure, which can be easily pulled out for cleaning the filter screen.

Compared with the prior art, the present invention has the following characteristics:

1. Reduce the volume of the ventilation system;

2. Cancel the fan and adopt natural ventilation to avoid forcibly sucking the dusty air into the cabin;

3. Improve the conventional louver structure to solve the problem that sand and dust can easily enter the cabin through the gap of the louver with the wind;

4. Solve the problem that the conventional filter cannot be easily disassembled and cleaned.

The invention well solves the problems of ventilation, heat dissipation and sand prevention of prefabricated cabins and opening and closing stations under high temperature and high dust environment, and has the following advantages:

1. Easy to manufacture and low process requirements;

2. Simple structure, significant function, high cost performance;

3. No need for auxiliary power supply, energy saving and environmental protection.

4. Low operation and maintenance cost, easy to clean and replace.

Description of drawings

Fig. 1 is a schematic structural view of a labyrinth ventilating and dustproof shutter of the present invention.

detailed description

Referring to Fig. 1, the labyrinth ventilation and dust-proof louvers shown in the figure are installed in the box wall 100 of the prefabricated substation box body. The labyrinth ventilation and dust-proof louvers include a window 200, and the inside of the window 200 is provided with ventilation The air duct 210 is provided with a vent 220 at the upper end inside the window 200, the air inlet end of the air vent 220 communicates with the air outlet end of the air duct 210, and the air outlet end of the air vent 220 communicates with the interior 110 of the prefabricated substation box body , the air inlet end of the air duct 210 is located at the lower part of the window 200 and communicates with the exterior 120 of the prefabricated substation box body. Louvers 280 are arranged on the air inlet end of the air duct 210 .

The feature of the present invention is that several baffle plates 230 inclined downwards at 45° are arranged alternately at intervals in the air duct 210, and these baffle plates 230 change the air duct 210 into a labyrinth air duct; Shaped sand discharge plate 240 and sand discharge port 250, the sand on the sand discharge plate 240 is released to the outside 120 of the prefabricated substation box body through the sand discharge port 250.

Removable filter screens 260 and 270 are respectively provided at the air inlet end and the air outlet end of the air vent 220 . Removable filter screen 260,270 is equally divided into removable filter screen frame 261,271 and stainless steel filter screen 262,272 installed on the removable type filter screen frame 261,271, stainless steel filter screen 262 is 100 Purpose stainless steel strainer, stainless steel strainer 272 is 200 purpose stainless steel strainer.

The wind entrained with dust enters the ventilation duct 210 from the louvers 280, and a blocking plate 230 is set in the ventilation duct 210 in the direction of travel of the dust to reduce the wind pressure. On the blocking plate 230 layer by layer, the blocking plate 230 is designed to be inclined downward at an angle of 45°, and the dust accumulated on the blocking plate 230 will eventually fall to the sand discharge plate 240 at the bottom and be discharged through the sand discharge port 250. The wind carrying a small amount of fine sand and dust through the labyrinth ventilation channel is filtered by two layers of stainless steel filter screens 262 and 272 and then enters the interior of the pre-installed substation box 110. The fine sand and dust basically adhere to the stainless steel filter screen 262 , 272, the removable filter screen 260,270 can be easily extracted to clean the stainless steel filter screen 262,272.

Claims (6)

1. labyrinth type dust control by ventilation shutter, including forms, the forms are internally provided with ventilating duct, inside the forms Upper end be provided with ventilating opening, the air intake of the ventilating opening connects with the outlet air end of the ventilating duct, and the ventilating opening goes out With being connected inside pre-installed transformer station box, the air intake of the ventilating duct is located at bottom and and the prepackage type of the forms at wind end Transformer station box ft connection, it is characterised in that interleaved is provided with some stops tilted down in the ventilating duct The ventilating duct is become labyrinth type ventilating duct by plate, these barrier plates；It is provided with the bottom of the ventilating duct oblique Husky plate and sand discharging port are let out, the sandy soil let out on husky plate are let out to pre-installed transformer station box by sand discharging port.

2. labyrinth type dust control by ventilation shutter as claimed in claim 1, it is characterised in that on the air intake of the ventilating duct It is provided with shutter.

3. labyrinth type dust control by ventilation shutter as claimed in claim 1, it is characterised in that the angle of inclination of the barrier plate is 45°。

4. labyrinth type dust control by ventilation shutter as claimed in claim 3, it is characterised in that the ventilating opening air intake and Outlet air end be respectively arranged with first can withdraw-type filter screen and second can withdraw-type filter screen.

5. labyrinth type dust control by ventilation shutter as claimed in claim 4, it is characterised in that described first can withdraw-type filter screen and Second can withdraw-type filter screen be divided into first can withdraw-type screen holder, second can withdraw-type screen holder and can installed in described first The first stainless steel filtering net on withdraw-type screen holder, installed in described second the second stainless steel filter that can be on withdraw-type screen holder Net.

6. labyrinth type dust control by ventilation shutter as claimed in claim 5, it is characterised in that first stainless steel filtering net is The stainless steel filtering net of 100 mesh, the second stainless steel filtering net are the stainless steel filtering net of 200 mesh.