CN207513902U - Air exhaust cooling device with noise elimination function - Google Patents

Abstract

The utility model relates to an exhaust air cooling device with the function of silencing noise. It includes an inlet pipe located at the exhaust port of the main transformer room, and its characteristic is that the outer end of the inlet pipe has an inner static pressure box, a box fan, an outer static pressure box and a muffler in sequence. There are inlets and outlets on the inner static pressure box, box-type fan and outer static pressure box respectively, between the inlet of the inner static pressure box and the outer end of the inlet pipe, between the outlet of the inner static pressure box and the inlet of the box-type fan, The outlet of the fan and the inlet of the external static pressure box, and the outlet of the external static pressure box and the inlet of the muffler are all connected together. By adopting the utility model, not only potential safety hazards can be eliminated, but also the health and normal life of nearby residents can be benefited. It is suitable for the exhaust cooling of the main transformer room of the substation.

Description

Exhaust air cooling device with noise reduction function

technical field

The utility model relates to an exhaust device. Specifically, it is an exhaust cooling device with noise reduction function for exhausting hot air in the room and lowering the indoor temperature. It is especially suitable for the exhaust cooling of the main transformer room of the substation.

Background technique

It is well known in the electric power industry that the temperature of the main transformer in a substation will increase when it is in operation, which in turn will heat up the air in the main transformer room. However, the main transformer works in a relatively high temperature environment for a long time, and there will be potential safety hazards. In order to eliminate potential safety hazards, the traditional method is to install a fan at the exhaust port of the main transformer room, so as to discharge the hot air in the main transformer room and realize the cooling of the main transformer room. In seasons when the outdoor air temperature is lower than the indoor temperature of the main transformer, such as cold winter, it may be feasible to use the above method. However, in hot summer, due to the high external air temperature, it is difficult to reduce the temperature in the main transformer room only by using the above method, and there are still potential safety hazards. In addition, if a fan is installed at the exhaust port of the main transformer room, the airflow noise generated by the fan during exhaust and the superimposed noise of the magnetic field and vibration generated by the main transformer during operation cannot be eliminated, which will affect the health and normal life of the surrounding residents.

Utility model content

The problem to be solved by the utility model is to provide an exhaust cooling device with a noise reduction function. The use of the exhaust air cooling device with noise reduction function can not only eliminate potential safety hazards, but also benefit the health and normal life of nearby residents.

The above-mentioned problem to be solved by the utility model is realized by the following technical solutions:

The exhaust air cooling device with noise reduction function of the utility model includes an inlet pipe located at the exhaust port of the main transformer room, and its feature is that the outer end of the inlet pipe has an internal static pressure box, a box-type fan, an external static pressure box and a muffler in turn. . There are inlets and outlets on the inner plenum, box-type fan, and outer plenum, between the inlet of the inner plenum and the outer end of the inlet pipe, between the outlet of the inner plenum and the inlet of the box-type fan, and the box-type The outlet of the fan and the inlet of the external static pressure box, and the outlet of the external static pressure box and the inlet of the muffler are all connected together.

A further improvement of the utility model is that a first reducing pipe is connected between the outlet of the box-type fan and the inlet of the external static pressure box, and the large end and the small end of the first reducing pipe are respectively connected with the outlet of the box-type fan and the outside. The inlet of the static pressure box is connected.

A further improvement of the utility model is that the first reducing pipe is composed of a middle layer, an inner layer and an outer layer, the middle layer is a glass wool board, the inner layer is a punched steel plate, and the outer layer is a steel plate.

A further improvement of the utility model is that there is an elbow and a second reducing pipe in sequence between the external static pressure tank and the muffler, and the small end and the large end of the second reducing pipe are respectively connected with the outer end of the elbow and the inlet of the muffler .

A further improvement of the utility model is that the bent pipe and the second reducing pipe are composed of a middle layer, an inner layer and an outer layer, the middle layer is a glass wool board, the inner layer is a punched steel plate, and the outer layer is a steel plate.

A further improvement of the utility model is that there are two box-type fans, two inner plenums and two outer plenums, and two outlets of the inner plenum and two inlets of the outer plenum. One, the two outlets of the inner plenum are respectively connected to the inlet of a box-type fan, and the outlets of the two box-type fans are respectively connected to one inlet of the outer plenum.

A further improvement of the utility model is that the inlet pipe, the inner plenum, and the outer plenum are all composed of a middle layer, an inner layer and an outer layer, the middle layer is a glass wool board, and the inner layer is a punched steel plate , the outer layer is steel plate.

A further improvement of the utility model is that the box-type fan is composed of a casing and a fan inside the casing, the casing is composed of a middle layer, an inner layer and an outer layer, the middle layer is a glass wool board, and the inner layer is a punching layer. Perforated steel plate, the outer layer is steel plate.

A further improvement of the utility model is that the muffler includes a shell, the shell is cylindrical, and has a connecting flange at one end, and is characterized in that there are at least two composite mufflers inside the shell.

As can be seen from the above scheme, since the utility model is that the outer end of the inlet pipe has an internal plenum, a box-type fan, an external plenum and a muffler, under the action of the box-type fan, the velocity of the airflow discharged from the inlet pipe passes through After the inner plenum and the outer plenum, the volume of the inner cavity of the inner plenum and the outer plenum decreases, so that the energy of the noise molecules transmitted by the airflow can be attenuated. And because the muffler is installed after the external static pressure box, on the premise of ensuring that the main transformer room can cool down and eliminate potential safety hazards, the noise of the exhaust airflow is further reduced, thereby eliminating the impact on the health and normal life of residents near the substation. influences.

Description of drawings

Fig. 1 is the structure schematic diagram of the exhaust air cooling device with noise elimination function of the present utility model;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is a schematic structural diagram of the box fan in Fig. 1;

Fig. 4 is an enlarged view at I place among Fig. 3;

Fig. 5 is a structural schematic diagram of the muffler in Fig. 1;

Fig. 6 is the left side view of Fig. 5;

Fig. 7 is a cross-sectional view along line A-A of Fig. 6 .

Detailed ways

As shown in Figure 1 and Figure 2, the exhaust air cooling device with noise reduction function of the present utility model includes an inlet pipe 1 located at the exhaust port of the main transformer room, and the outer end of the inlet pipe 1 is sequentially provided with an internal static pressure box 2, Box fan 3, external static pressure box 5 and muffler 6. The inner plenum 2, the box-type fan 3, and the outer plenum 5 are respectively processed with inlets and outlets, between the inlet of the inner plenum 2 and the outer end of the inlet pipe 1, and between the outlet of the inner plenum 2 and the box-type The inlet of fan 3, the outlet of box fan 3 and the inlet of external plenum 5, the outlet of external plenum 5 and the inlet of muffler 6 are all connected together. The inlet pipe 1, the inner plenum 2 and the outer plenum 5 are all composed of a middle layer, an inner layer and an outer layer. The middle layer is a glass wool board, the inner layer is a punched steel plate, and the outer layer is a steel plate.

The outlet of the box-type fan 3 and the inlet of the external static pressure box 5 are connected with a first variable diameter pipe 4, and the large end and the small end of the first variable diameter pipe 4 are connected with the outlet of the box-type fan 3 and the external static pressure box 5 respectively. The import is connected. The first reducing pipe 4 is composed of a middle layer, an inner layer and an outer layer, the middle layer is a glass wool board, the inner layer is a punched steel plate, and the outer layer is a steel plate.

Between the external static pressure tank 5 and the muffler 6, there is an elbow 7 and a second reducing pipe 8 in sequence, and the small end and the large end of the second reducing pipe 8 are respectively connected with the outer end of the elbow 7 and the inlet of the muffler 6 . Both the bent pipe 7 and the second reducing pipe 8 are composed of a middle layer, an inner layer and an outer layer, the middle layer is a glass wool board, the inner layer is a punched steel plate, and the outer layer is a steel plate.

There are two box fans 3, two inner plenums 2 and two outer plenums, two outlets of the inner plenum 2 and two inlets of the outer plenum 5, and two inner plenums. The two outlets of the plenum 2 are connected to the inlet of a box fan 3 respectively, and the outlets of the two box fans 3 are connected to an inlet of the external static pressure box 5 respectively.

The box fan 3 includes a fan 304 and a sound insulation box 303 . A support cylinder 302 is arranged outside the fan 304 , the axial direction of the fan 304 coincides with the axial center of the support cylinder 302 , and the periphery of the fan 304 is connected with the inner wall of the support cylinder 302 by means of brackets 301 . The sound insulation box 303 is a cuboid with holes processed on both end plates. The outer diameter of a part of the support tube 302 adjacent to its two ends is smaller than the outer diameter of its middle section, and the two ends of the support tube 302 respectively protrude from the two end plates of the sound insulation box 303 through the holes.

As shown in Fig. 4, the surrounding walls and two end plates of the sound insulation box 303 are all sound insulation panels. The sound insulation board contains three layers of sound absorbing layers 305 and four layers of sound insulating layers 307, and the three layers of sound absorbing layers 305 and the four layers of sound insulating layers 307 are compounded alternately. Wherein: the sound absorption layer 305 is a glass wool board; the sound insulation layer 307 is a punched steel plate.

As shown in FIGS. 5 and 6 , the muffler 6 includes a housing 601 . The shell 601 is a square tube with a square cross section, and a connecting flange 612 is installed at one end thereof. The housing 601 is composed of a sound-absorbing cotton board and steel plates on both sides of the sound-absorbing cotton board. There are three composite noise-absorbing sheets 602 inside the housing 601, and the surfaces of the three composite-type noise-absorbing sheets 602, the surfaces of the three composite-type noise-absorbing sheets 602 and the two shell walls of the opposite casing 601, are combined. The planes of the composite sound-absorbing sheets 602 are parallel to the longitudinal direction of the housing, and the longitudinal two sides of the three composite-type sound-absorbing sheets 602 are respectively connected with the other two opposite shell walls of the casing 601 .

As shown in Fig. 7, the composite sound-absorbing sheet 602 includes a middle partition 605, and both sides of the middle partition 605 are compounded with an interference sheet, an inner orifice plate 608, a sound-absorbing plate 610, and an outer orifice plate 607 sequentially from the inside to the outside. , the same ends of the two outer orifice plates 607 are connected together. Wherein, the ends of the inner orifice plate 608 adjacent to the air inlet of the housing 601 are connected together by means of a first steel strip 609 . in:

The interference sheet contains an intermediate layer 605 which is a glass wool board. The two sides of the middle layer 605 are respectively compounded with a steel plate 604 and a punched steel plate 611;

Both the inner orifice plate 608 and the outer orifice plate 607 are punched steel plates;

The sound-absorbing board 610 is a glass wool board;

The ends of the two outer orifice plates 607 adjacent to the air inlet of the housing 601 are connected together in an arc shape, and their other ends are connected together by means of a second steel strip 603;

The interference sheet is a slat whose longitudinal direction is perpendicular to the longitudinal direction of the composite sound-absorbing sheet 602 , and which is uniformly distributed along the longitudinal direction of the composite-type sound-absorbing sheet 602 .

The longitudinal two sides of the interference sheet are respectively connected with the middle partition 606 and the corresponding inner hole plate 608, and they are all inclined in the same direction. A pair of composite sound-absorbing sheets 602 corresponding to the two sides of the middle partition 606 form a <shaped .

Claims (9)

1. An exhaust cooling device with noise reduction function, including an inlet pipe located at the exhaust port of the main transformer room, characterized in that the outer end of the inlet pipe has an internal plenum, a box fan, an external plenum and a muffler in sequence; There are inlets and outlets on the inner plenum, box-type fan, and outer plenum, between the inlet of the inner plenum and the outer end of the inlet pipe, between the outlet of the inner plenum and the inlet of the box-type fan, and the box-type The outlet of the fan and the inlet of the external static pressure box, and the outlet of the external static pressure box and the inlet of the muffler are all connected together. 2. The exhaust air cooling device with noise reduction function according to claim 1, characterized in that a first reducing pipe is connected between the outlet of the box-type fan and the inlet of the external static pressure box, and the large diameter of the first reducing pipe is The end and the small end are respectively connected with the outlet of the box fan and the inlet of the external static pressure box. 3. The exhaust air cooling device with noise reduction function according to claim 2, characterized in that the first reducing pipe is composed of an intermediate layer, an inner layer and an outer layer, the intermediate layer is a glass wool board, and the inner layer The first layer is punched steel plate, and the outer layer is steel plate. 4. The exhaust air cooling device with noise reduction function according to claim 1, characterized in that between the external static pressure tank and the muffler, there are in turn an elbow pipe and a second reducing pipe, and the small end of the second reducing pipe and the big end are respectively connected with the outer end of the elbow and the inlet of the muffler. 5. The exhaust air cooling device with noise reduction function according to claim 4, characterized in that the elbow and the second reducing pipe are composed of an intermediate layer, an inner layer and an outer layer, and the intermediate layer is made of glass Cotton board, the inner layer is punched steel plate, and the outer layer is steel plate. 6. The exhaust air cooling device with noise reduction function according to claim 1, characterized in that there are two box-type fans, and both the inner static pressure box and the outer static pressure box are two, and the inner static pressure There are two outlets of the box and two inlets of the outer static pressure box. The two outlets of the inner static pressure box are respectively connected to the inlet of a box-type fan, and the outlets of the two box-type fans are respectively connected to one inlet of the outer static pressure box. . 7. The exhaust air cooling device with noise reduction function according to claim 1, characterized in that the inlet pipe, the inner plenum, and the outer plenum are all composed of an intermediate layer, an inner layer and an outer layer, and the The middle layer is glass wool board, the inner layer is punched steel plate, and the outer layer is steel plate. 8. The exhaust air cooling device with noise reduction function according to claim 1, characterized in that the box-type fan comprises a casing and a fan inside the casing, and the casing is composed of a middle layer, an inner layer and an outer layer, The middle layer is a glass wool board, the inner layer is a punched steel plate, and the outer layer is a steel plate. 9. The exhaust air cooling device with muffler function according to claim 1, characterized in that the muffler contains a shell, the shell is cylindrical, one end has a connecting flange, it is characterized in that there is a At least two composite mufflers.