Ventilation cabinet for mechanical room

Abstract

The utility model discloses a mechanical room ventilation cabinet which comprises a shutter, a cyclone dust collector is connected to the air outlet side of the shutter, and a first air duct, a first fan and a filter cabinet arranged below the first fan are sequentially connected to the air outlet side of the cyclone dust collector; the lower side of the cyclone dust collector is connected with a waste discharge mechanism; the waste discharge mechanism comprises a second air duct, the upper end of the second air duct is connected with the lower side of the cyclone dust collector, the lower end of the second air duct extends downwards on the outer side of the filter cabinet in the height direction of the filter cabinet and is connected with a second fan, and an air outlet of the second fan is communicated with the outside. According to the utility model, the overall maintenance is facilitated, clean cold air can be provided for the mechanical room, and the ventilation cooling efficiency of electrical equipment in the mechanical room is improved.

Description

Technical Field

[0001] This utility model relates to a ventilation hood for a machine room, belonging to the field of ventilation and cooling technology for rail transit vehicles. Background Technology

[0002] Currently, as electric locomotives serve as the primary means of freight and passenger travel, their development towards cleaner and more comfortable operation is inevitable. Electric locomotives, especially high-power freight electric locomotives, have been operating on mainline railways with high levels of coal dust. Their electrical equipment in the engine room is ventilated and cooled by drawing in fresh air from outside the locomotive through the engine room fume hoods. At the same time, the engine room fume hoods maintain a positive pressure (mPa) in the engine room to prevent dust from entering the engine room through the gaps in the electric locomotive.

[0003] There are two types of ventilation methods for auxiliary transformer cabinets in electric locomotives both domestically and internationally: 1. The auxiliary transformer cabinet only provides ventilation and heat dissipation for the auxiliary transformer and does not have the function of ventilation and heat dissipation for the machine room. 2. The auxiliary transformer cabinet provides both ventilation and heat dissipation for the auxiliary transformer and the machine room. Both types of auxiliary transformer cabinets have only one ventilation branch and are equipped with one cooling fan. For auxiliary transformer cabinets suitable for machine room ventilation and heat dissipation, outside air is drawn in from outside the locomotive by the cooling fan, coarsely filtered through louvers on the side walls, and then used to ventilate and dissipate heat for the auxiliary transformer. After being filtered by a cyclone dust collector, the air enters the locomotive's machine room, dissipates heat for other cabinets within the machine room, and is then exhausted outside the locomotive. This type of auxiliary transformer cabinet also has the function of maintaining positive pressure in the machine room.

[0004] Chinese utility model CN219180311U discloses an auxiliary transformer cabinet for locomotives, comprising a cabinet body, a first air duct disposed inside the cabinet body, a fan connected to the air duct, a partition dividing the cabinet body into an upper cavity and a lower cavity, an auxiliary transformer disposed on the lower side of the partition, and a cyclone dust collector disposed on the upper side of the partition; a second air duct is disposed on the air outlet side of the cyclone dust collector; the air inlet of the second air duct is connected to the air outlet side of the cyclone dust collector, and the air outlet is directly facing the auxiliary transformer. However, this solution cannot solve the problem that due to the harsh operating environment of high-power freight electric locomotives, there is a lot of dust on the railway line, and the dust filtration efficiency of the fume hood in the machine room is low, resulting in a large amount of dust in the machine room, reducing the service life of electrical equipment in the machine room, and also increasing the cleaning work in the machine room. Utility Model Content

[0005] The present invention aims to address the above-mentioned technical problems by providing a machine room fume hood that can effectively filter rainwater and dust and is easy to maintain.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A fume hood for a machine room includes louvers, a cyclone dust collector connected to the air outlet side of the louvers, a first air duct, a first fan, and a filter cabinet disposed below the first fan sequentially connected to the air outlet side of the cyclone dust collector; a waste discharge mechanism is connected to the lower side of the cyclone dust collector; the waste discharge mechanism includes a second air duct whose upper end is connected to the lower side of the cyclone dust collector, the lower end of the second air duct extending downward along the height direction of the filter cabinet on the outside of the filter cabinet and connected to a second fan, the air outlet of the second fan communicating with the outside.

[0008] Therefore, with the dual filtration of the cyclone dust collector and the filter cabinet, dust and rainwater in the air can be effectively filtered. Placing the cyclone dust collector on the outside of the filter cabinet not only allows for a larger volume of cyclone dust collector, but also, by placing it at the inlet of the first air duct, utilizes the high air velocity there to quickly filter coarse dust particles, thereby increasing filtration efficiency. Furthermore, the cyclone dust collector core can be removed without disassembling the filter cabinet, facilitating maintenance and cleaning of the cyclone dust collector. The waste discharge mechanism is located on the outside of the filter, facilitating the discharge of dust and accumulated water.

[0009] Based on the embodiments of this utility model, further optimizations can be made to this utility model. The optimized technical solutions are as follows:

[0010] To facilitate adjustment of the filtration efficiency of the fume hood and the air volume entering the machine room, an air volume adjustment mechanism is further provided between the second air duct and the air inlet of the second fan.

[0011] Furthermore, the air volume adjustment mechanism includes a first adjustment plate and a second adjustment plate stacked on top of each other, and both the first adjustment plate and the second adjustment plate are provided with ventilation holes; the first adjustment plate and the second adjustment plate are also provided with adjustment components for adjusting the relative position of the ventilation holes on the first adjustment plate and the second adjustment plate along the radial direction of the ventilation holes.

[0012] Furthermore, the adjustment assembly includes oblong holes formed in the first adjustment plate and the second adjustment plate, and fasteners for fixing the relative positions of the first adjustment plate and the second adjustment plate are inserted in the oblong holes.

[0013] Therefore, by adjusting the relative positions of the ventilation holes on the first and second adjustment plates, the size of the aperture formed by the two ventilation holes for air passage can be adjusted, thereby adjusting the dust exhaust air volume, adjusting the filtration efficiency of the fume hood and the air volume entering the machine room, and thus adjusting the positive pressure in the machine room.

[0014] Furthermore, a guide channel is provided around the first air duct, and a water outlet channel communicating with the guide channel is provided on the side of the guide channel facing the second air duct. A drain pipe is connected below the water outlet channel and extends downward to the outside.

[0015] To further filter the air and facilitate cleaning of the filter equipment, the filter cabinet is further enclosed on the side facing the louvers, while the other three sides are equipped with filter screens and connected to the mechanical compartment.

[0016] Furthermore, filter cotton is detachably installed on the filter screen.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1) The machine room fume hood of this utility model places the cyclone dust collector at the inlet of the first air duct, which uses the high wind speed at this location to quickly filter coarse dust particles and discharge them to the bottom of the vehicle through the dust exhaust fan. The airflow that has been coarsely filtered by the cyclone dust collector is then accelerated and pressurized by a high-efficiency axial centrifugal fan and blown out of the filter cabinet, which finely filters the fine dust in the airflow to ensure that the air finally blown into the machine room is clean. The cyclone dust collector is set on the outside of the filter cabinet, which facilitates the inspection and maintenance of the cyclone dust collector.

[0019] 2) The mechanical room fume hood of this utility model has a removable filter screen on three sides of the filter cabinet, which improves the cleaning and maintenance performance of the filter screen; an adjustment component is set in the exhaust duct, and the filtration efficiency and positive pressure of the mechanical room are adjusted by adjusting the exhaust air volume.

[0020] 3) The fume hood for the machine room of this utility model can effectively filter rainwater and dust, facilitate overall inspection and maintenance, provide clean cold air for the machine room, and improve the ventilation and cooling efficiency of the electrical equipment in the machine room. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the plan structure of the fume hood for the machine room of this utility model;

[0022] Figure 2 This is an isometric structural diagram of the air inlet side of the fume hood in the machine room of this utility model;

[0023] Figure 3 This is an isometric structural diagram of the exhaust side of the fume hood in the machine room of this utility model;

[0024] Figure 4 This is an attempt to view the air inlet side of the fume hood in the machine room of this utility model;

[0025] Figure 5 This is a schematic diagram of the air volume adjustment mechanism of the fume hood in the machine room of this utility model.

[0026] In the figure

[0027] 1-Louvre; 2-Cyclone dust collector; 3-First air duct; 4-First fan; 5-Filter cabinet; 51-Filter screen; 52-Filter cotton; 6-Waste discharge mechanism; 61-Second air duct; 7-Second fan; 8-Air volume adjustment mechanism; 81-First adjustment plate; 82-Second adjustment plate; 83-Ventilation hole; 84-Adjustment component; 841-Oval hole; 842-Fastener; 9-Guide channel; 91-Water outlet channel; 92-Drain pipe. Detailed Implementation

[0028] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0029] like Figure 1 As shown, the fume hood in the machine room of this embodiment includes a louver 1. A cyclone dust collector 2 is connected to the air outlet side of the louver 1. A first air duct 3, a first fan 4, and a filter cabinet 5 disposed below the first fan 4 are sequentially connected to the air outlet side of the cyclone dust collector 2. A waste discharge mechanism 6 is connected to the lower side of the cyclone dust collector 2. The waste discharge mechanism 6 includes a second air duct 61 whose upper end is connected to the lower side of the cyclone dust collector 2. The lower end of the second air duct 61 extends downward along the height direction of the filter cabinet 5 on the outside of the filter cabinet 5 and is connected to a second fan 7. The air outlet of the second fan 7 is connected to the outside.

[0030] The filter cabinet 5 is enclosed on the side facing the louver 1, and the other three sides are equipped with filter screens 51 and connected to the machine room; filter cotton 52 is detachably installed on the filter screens 51.

[0031] In this embodiment, the machine room fume hood arranges louvers 1 (primary stage) and cyclone dust collectors 2 (secondary stage) at the air inlet of the first air duct. Their coarse filtration capabilities effectively filter sand and dust, removing larger particles. The air, after two stages of filtration, is blown out through filter cotton 52 arranged in the filter cabinet 5 for fine filtration, improving maintenance convenience. The cyclone dust collector 5 is placed at the inlet, utilizing the high air velocity to quickly filter coarse dust particles, which are then exhausted to the underside of the machine by an exhaust fan. The airflow coarsely filtered by the cyclone dust collector 2 is then accelerated and pressurized by a high-efficiency axial centrifugal fan before being blown out from the three sides of the filter cabinet 5 where filter screens 51 are installed. Filter screens 51 finely filter fine dust particles in the airflow, ensuring that the air finally blown into the machine room is clean. Placing the cyclone dust collector on the outside of the filter cabinet 5 improves its inspection and maintenance performance; designing the filter screens on the three sides of the filter cabinet 5 as removable improves the cleaning and maintenance performance of the filter cabinet 5.

[0032] The cold air entering from the sloping roof first passes through louvers 1 to filter rainwater and large dust particles, then enters cyclone dust collector 2, which filters out most of the dust in the air. Then, it passes through the filter screen 51 of the filter cabinet 5 to filter out fine dust, and finally, the clean air enters the machine room. After the airflow passes through the coarse filter, it enters the high-efficiency, low-noise blower, where it is pressurized and then filtered by the filters on the three sides of the fume hood to remove the remaining dust and moisture before entering the machine room. The filter screen 51 and the filter cotton 52 have a removable structure, making inspection, maintenance, and cleaning convenient and quick.

[0033] To facilitate adjustment of the positive pressure between the machines, an airflow adjustment mechanism 8 is provided between the second air duct 61 and the second fan 7. The airflow adjustment mechanism 8 includes a first adjustment plate 81 and a second adjustment plate 82 stacked vertically. Both the first adjustment plate 81 and the second adjustment plate 82 are provided with ventilation holes 83. An adjustment component 84 is also provided on the first adjustment plate 81 and the second adjustment plate 82 for adjusting the relative position of the ventilation holes 83 along the radial direction of the ventilation holes 83. The adjustment component 84 includes a waist-shaped hole 841 opened on the first adjustment plate 81 and the second adjustment plate 82, and a fastener 842 for fixing the relative position of the first adjustment plate 81 and the second adjustment plate 82 is inserted through the waist-shaped hole 841.

[0034] The first adjusting plate 81 and the second adjusting plate 82 are two rectangular plates stacked flat along the height direction. Ventilation holes 83 of the same size are opened on the first adjusting plate 81 and the second adjusting plate 82. When the edges of the ventilation holes 83 on the first adjusting plate 81 and the second adjusting plate 82 completely overlap, the ventilation volume of the airflow regulating mechanism 8 is at its maximum, and the ventilation gap formed by the ventilation holes 83 on the first adjusting plate 81 and the second adjusting plate 82 is the size of a complete ventilation hole 83. When the first adjusting plate 81 and the second adjusting plate 82 move towards each other, the gap formed by the ventilation holes 83 on the first adjusting plate 81 and the second adjusting plate 82 is smaller than the diameter of a complete ventilation hole 83, and the dust exhaust airflow decreases. When the first adjusting plate 81 and the second adjusting plate 82 move away from each other, the gap formed by the ventilation holes 83 on the first adjusting plate 81 and the second adjusting plate 82 increases from its original size until the edges of the ventilation holes 83 on the two adjusting plates completely overlap, and the dust exhaust airflow increases. Therefore, the air volume entering the second air duct 61 can be adjusted by the size of the ventilation gap formed by the intersection of the ventilation holes 83 on the first adjusting plate 81 and the second adjusting plate 82. By adjusting the size of the dust exhaust air volume, the filtration efficiency of the fume hood and the air volume entering the machine room can be adjusted, thereby adjusting the positive pressure in the machine room.

[0035] For the moisture filtered out of the air, a guide groove 9 is provided around the first air duct 3. A water outlet groove 91 communicating with the guide groove 9 is provided on the side of the guide groove 9 facing the second air duct 61. A drain pipe 92 is connected below the water outlet groove 91 and extends downward to the outside.

[0036] Therefore, when the airflow carrying water droplets enters the first air duct 4, a large number of water droplets drip into the surrounding water collection boxes under the action of gravity, and then enter the water collection box at the bottom of the ventilation cabinet through the drain pipe before being discharged under the vehicle.

[0037] The fume hood in the machine room of this embodiment improves the inspection and maintenance efficiency of the cyclone dust collector by separating the core and frame. The frame is fixed on the air duct, and the core is fixed on the frame with bolts. The core can be removed by simply removing the bolts that fix the core. After cleaning the core, it can be reinstalled for continued use.

[0038] In this embodiment, the fume hood in the machine room has louvers installed on the side wall of the vehicle body. Outside air containing sand and dust (airflow rate Q m³ / s) enters the vehicle through the louvers for the first filtration and then goes to the cyclone dust collector. While performing filtration, the cyclone dust collector, under the action of the suction fan, discharges a certain proportion of air and sand and dust outside the vehicle (airflow rate q1 m³ / s). The remaining clean air enters the cabinet under the action of the supply fan, and then enters the machine room after further fine filtration through the three sides of the cabinet (airflow rate q2 m³ / s). This provides cold air to the machine room and maintains its positive pressure. The filtration efficiency and positive pressure of the machine room can be adjusted by adjusting the dust discharge airflow rate q1 (q1 + q2 = Q).

[0039] The above embodiments should be understood as being used only to illustrate the present invention more clearly, and not to limit the scope of the present invention. After reading the present invention, any modifications of the present invention by those skilled in the art in various equivalent forms fall within the scope defined by the appended claims.

Claims

1. A mechanical interlock fume hood comprising louvers (1), characterized in that: A cyclone dust collector (2) is connected to the air outlet side of the louver (1), a first air duct (3), a first fan (4) and a filter cabinet (5) arranged below the first fan (4) are connected to the air outlet side of the cyclone dust collector (2) in sequence; a waste discharge mechanism (6) is connected to the lower side of the cyclone dust collector (2); the waste discharge mechanism (6) comprises a second air duct (61) with the upper end connected to the lower side of the cyclone dust collector (2), the lower end of the second air duct (61) extends downward along the height direction of the filter cabinet (5) outside the filter cabinet (5) and is connected with a second fan (7), and the air outlet of the second fan (7) is communicated with the outside.

2. The inter-bay fume hood of claim 1, wherein: The second air duct (61) and the air inlet of the second fan (7) are provided with a wind volume adjusting mechanism (8).

3. The inter-bay ventilation cabinet of claim 2, wherein: The wind volume adjusting mechanism (8) comprises a first adjusting plate (81) and a second adjusting plate (82) arranged in a stack, and the first adjusting plate (81) and the second adjusting plate (82) are provided with air vents (83); the first adjusting plate (81) and the second adjusting plate (82) are also provided with an adjusting assembly (84) for adjusting the relative position of the air vents (83) on the first adjusting plate (81) and the second adjusting plate (82) along the radial direction of the air vents (83).

4. The inter-bay ventilation cabinet of claim 3, wherein: The adjusting assembly (84) comprises a waist-shaped hole (841) formed on the first adjusting plate (81) and the second adjusting plate (82), and a fastener (842) is arranged in the waist-shaped hole (841) for fixing the relative position of the first adjusting plate (81) and the second adjusting plate (82).

5. The interbay ventilation cabinet of claim 1, wherein: A flow guide groove (9) is arranged around the first air duct (3) outside the first air duct (3), a water outlet groove (91) communicated with the flow guide groove (9) is arranged on the side of the flow guide groove (9) facing the second air duct (61), a drain pipe (92) is connected below the water outlet groove (91), and the drain pipe (92) extends downward to the outside.

6. The mechanical fume hood according to any one of claims 1-5, wherein: The filter cabinet (5) is closed on the side facing the louver (1), and filter screens (51) are arranged on the other three sides and communicated with the machine room.

7. The inter-bay fume hood of claim 6, wherein: The filter screens (51) are detachably installed with filter cotton (52).

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