CN213362748U - Pit ventilation and smoke exhaust silencer of closed target way - Google Patents

Abstract

The utility model discloses a pit ventilation muffler of discharging fume of closed target way, including the indoor outer pit passageway of intercommunication, the indoor side oral area of pit passageway be the air intake, the outdoor side oral area of pit passageway be the air outlet of being connected with air extraction equipment, the pit passageway in be provided with a plurality of amortization piece subassemblies along its path direction interval. Pit ventilation silencer of closed target track when realizing ventilating and discharging fume carries out noise reduction treatment, effectively ensures the inside speed of discharging fume of closed target track, the support personnel are healthy, effectively reduces through pit exhaust noise, noise abatement pollution.

Description

Pit ventilation and smoke exhaust silencer of closed target way

Technical Field

The utility model relates to a ventilation processing technology field in closed or semi-closed ammunition test target path space especially relates to a pit ventilation silencer of discharging fume of closed target path.

Background

The existing gun/cannon uses the closed or semi-closed target path, what the exhaust fume usually uses is the way of the natural exhaust or direct fan exhaust, the effect is bad, the speed is slow, and have certain health influence to the personnel, after adopting the mechanical ventilation, the exhaust passage can spread higher noise, and the shock wave in the target path can produce the impact influence to the outdoor exhaust facility through the exhaust passage. The existing target way is difficult to effectively reduce noise while ventilating, the ventilation effect is poor, the quality of indoor air is influenced, and the noise pollution to the external environment is serious.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem and the technical task who provides improve prior art, provide a pit ventilation silencer of discharging fume of closed target way, the target way of solving among the prior art is difficult to carry out good ventilation and falls make an uproar, and the indoor air quality is poor, the big problem of noise pollution.

For solving the above technical problem, the technical scheme of the utility model is that:

the utility model provides a muffler of discharging fume that pit ventilation of closed target track, is including the indoor outer pit passageway of intercommunication, the indoor side oral area of pit passageway be the air intake, the outdoor side oral area of pit passageway be the air outlet of being connected with air extraction equipment, the pit passageway in be provided with a plurality of amortization piece subassemblies along its route direction interval. Pit ventilation muffler of closed target way realize ventilating with the air extraction equipment cooperation and discharge fume, can effectually outwards discharge the flue gas that indoor rifle attack, cannon attack produced from the bottom surface of closed or semi-closed target way, guarantee interior space's air quality utilizes a plurality of amortization piece subassemblies that set up in the pit passageway to carry out multistage amortization simultaneously and falls the noise, noise when reducing the ventilation, reduces the noise pollution to external environment.

Further, the inner wall of pit passageway be provided with the amortization casing, gaseous utilize the amortization casing to fall the noise along the way when flowing along the route direction of pit passageway, improve amortization noise reduction effect, noise pollution abatement.

Furthermore, the noise reduction shell is made of sound absorption porous materials, the sound absorption effect is good, and the noise energy is effectively reduced when the noise is continuously reflected on the noise reduction shell.

Furthermore, the air inlet is provided with a protective net, so that sundries are prevented from falling to block a pit channel, and the smoothness of the pit channel is guaranteed.

Furthermore, the air inlet is higher than the indoor ground, so that the condition that personnel fall off at the air inlet is effectively avoided, and the safety is improved.

Furthermore, the silencing sheet assembly is formed by arranging a plurality of silencing sheets parallel to the path direction of the pit channel at intervals in the direction vertical to the path direction of the pit channel, the silencing sheet assembly is a sound-absorbing and noise-reducing section of the pit ventilation and smoke-exhaust silencer of the closed target track, noise can be greatly reduced, the pit channel is divided into a plurality of narrow channels by the silencing sheets arranged at intervals in the cross section direction of the pit channel, and air flow continuously flows along the path of the pit channel after passing through the narrow channels between the adjacent silencing sheets.

Furthermore, the arrangement directions of the noise-reducing sheets of the adjacent noise-reducing sheet assemblies are mutually perpendicular, noise is reduced better through the polarization principle, and the noise-reducing effect is improved.

Furthermore, the pit channel is in a U-shaped path, so that the influence of instantaneous positive pressure on air extraction equipment outside the room can be reduced.

Furthermore, the corners of the pit channel of the U-shaped path are right angles, the pit channel forms a first silencing static pressure chamber and a second silencing static pressure chamber at the right angle along the airflow direction, the first silencing static pressure chamber and the second silencing static pressure chamber are sound-proof silencing sections, the noise reduction effect is improved, and the first silencing static pressure chamber and the second silencing static pressure chamber adjust the airflow direction.

Furthermore, a first group of silencing sheet assemblies are arranged between the air inlet and the first silencing static pressure chamber, a second group of silencing sheet assemblies are arranged between the first silencing static pressure chamber and the second silencing static pressure chamber, and the silencing sheet assemblies and the silencing static pressure chambers are alternately arranged, namely, the sound-absorbing and noise-reducing sections and the anti-type silencing sections are alternately arranged, so that the noise-reducing effect can be effectively improved.

Compared with the prior art, the utility model discloses the advantage lies in:

pit ventilation silencer of closed target track when realizing ventilating and discharging fume carries out noise reduction treatment, effectively ensures the inside speed of discharging fume of closed target track, support personnel are healthy, adopt compound means of making an uproar that falls, effectively reduce through pit exhaust noise, noise abatement pollution.

Drawings

FIG. 1 is a schematic side view of a pit ventilation and smoke exhaust muffler for a closed target track;

fig. 2 is a schematic view of the internal three-dimensional structure of a pit ventilation smoke-exhaust silencer of the closed target way.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The embodiment of the utility model discloses pit ventilation silencer of discharging fume of closed target way, simple structure, it is convenient to implement, and the smooth and easy nature of ventilation and discharging fume is good, ensures the indoor air quality to effective amortization is fallen and is made an uproar, noise abatement pollution.

As shown in fig. 1-2, a pit ventilation silencer of closed target track, including intercommunication indoor outer pit passageway 1, pit passageway 1 sets up the lower part at the wall face, the indoor side oral area of pit passageway 1 be air intake 11, the outdoor side oral area of pit passageway 1 be the air outlet 12 of being connected with air extraction equipment, air extraction equipment passes through pit passageway 1 and outwards convulsions for indoor gas is taken out along pit passageway 1, ensures indoor air quality, pit passageway 1 in be provided with a plurality of noise damping piece subassemblies 3 along its path direction interval, utilize noise damping piece subassembly 3 to carry out multistage noise reduction when the air current flows along pit passageway 1.

In this embodiment, pit passageway 1's inner wall is provided with amortization casing 2, utilizes amortization casing 2 to cover pit passageway 1's whole inner wall promptly, and amortization casing 2 is for adopting sound-absorbing porous material to make, utilizes amortization casing 2 to carry out amortization noise reduction along the way when the air current flows along pit passageway 1 and handles, improves the noise reduction effect, and the noise is continuous effectively reduces the noise energy when the reflection on the amortization casing.

The air inlet 11 is higher than the indoor ground, effectively prevents personnel at the dangerous situation that the air inlet department takes place to fall to the air inlet 11 is provided with protection network 13, avoids debris to fall to cause the jam in pit passageway 1, ensures the unobstructed of pit passageway 1.

In this embodiment, the silencing sheet assembly 3 includes a plurality of silencing sheets parallel to the path direction of the pit passage 1, the silencing sheets are arranged at intervals in the direction perpendicular to the path direction of the pit passage 1, that is, the silencing sheet assembly 3 is an array type silencing sheet, the silencing sheets arranged at intervals divide the pit passage 1 into a plurality of narrow passages in the cross-sectional direction, the air flow passes along the narrow passages, the silencing sheet assembly 3 is used for fully performing noise reduction treatment while the ventilation and smoke exhaust smoothness is not affected, the silencing sheet assembly 3 is a sound absorption and noise reduction section of a pit ventilation and smoke exhaust silencer of a closed target track, and relatively soft sound absorption materials are used, so that the noise can be greatly reduced; and the arrangement directions of the noise-reduction sheets of the adjacent noise-reduction sheet assemblies 3 are mutually vertical, so that the noise can be reduced better according to the polarization principle, and the noise reduction effect is improved.

Specifically, pit shaft 1 is a U-shaped path, the corners of the U-shaped path are at right angles, pit shaft 1 at right angles along the direction of airflow constitutes a first silencing static pressure chamber 14 and a second silencing static pressure chamber 15, in this embodiment, there are two sets of silencing sheet assemblies 3, the first set of silencing sheet assemblies 3 is disposed between air inlet 11 and first silencing static pressure chamber 14, the second set of silencing sheet assemblies 3 is disposed between first silencing static pressure chamber 14 and second silencing static pressure chamber 15, the silencing sheets of the first set of silencing sheet assemblies 3 are parallel to the wall surface, the silencing sheets of the second set of silencing sheet assemblies 3 are perpendicular to the wall surface, so that in the direction of path of pit shaft 1, silencing sheet assemblies 3 and silencing static pressure chambers are arranged in a staggered manner, and the first silencing static pressure chamber 14 and second silencing static pressure chamber 15 have suddenly enlarged cross-sectional spaces relative to the cross-sectional spaces at silencing sheet assemblies 3, the impedance is changed to generate reflection and interference of sound energy, so that the sound energy radiated outwards is reduced, the first silencing static pressure chamber 14 and the second silencing static pressure chamber 15 form an anti-noise section, the synergistic effect of the silencing sheet assembly 3 and the silencing static pressure chambers effectively improves the silencing and noise reduction effects, and the first silencing static pressure chamber 14 and the second silencing static pressure chamber 15 are cavities at corners and are used for changing the direction of air flow and have the effect of flow equalization.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.

Claims (10)

1. The utility model provides a muffler of discharging fume that pit ventilation of closed target track, its characterized in that, is including indoor outer pit passageway (1) of intercommunication, the indoor side oral area of pit passageway (1) be air intake (11), the outdoor side oral area of pit passageway (1) be air outlet (12) of being connected with air extraction equipment, pit passageway (1) in be provided with a plurality of amortization piece subassembly (3) along its route direction interval.

2. Pit ventilation and smoke exhaust muffler of a closed target track according to claim 1, characterized in that the inner wall of the pit shaft (1) is provided with a sound exhaust casing (2).

3. Pit ventilation and smoke exhaust muffler of a closed target track according to claim 2, characterized in that the muffler casing (2) is made of sound-absorbing porous material.

4. Pit ventilation and smoke exhaust silencer of closed target track according to claim 1, characterized in that said air inlet (11) is provided with a protective screen (13).

5. Pit ventilation and smoke exhaust silencer of a closed target track according to claim 1, characterized in that the air inlet (11) is higher than the indoor floor.

6. A pit ventilation and smoke exhaust silencer for a closed target track according to claim 1, characterized in that said silencer blade assembly (3) is formed by several silencer blades arranged at intervals in a direction perpendicular to the path of the pit passage (1) and parallel to the path of the pit passage (1).

7. A pit ventilation and smoke exhaust silencer for a closed target track according to claim 6, characterized in that the silencer blades of adjacent silencer blade assemblies (3) are arranged in directions perpendicular to each other.

8. Pit ventilation and smoke exhaust muffler of a closed target track according to any of claims 1 to 7, characterized in that the pit shaft (1) is in a U-shaped path.

9. Pit ventilation and smoke evacuation silencer for a closed target track according to claim 8, characterized in that the corners of the pit shaft (1) of the U-shaped path are at right angles, and that the pit shaft (1) in the direction of the gas flow forms at the right angles a first (14) and a second (15) silencing static pressure chamber, respectively.

10. Pit ventilation and smoke exhaust silencer for closed target track according to claim 9, characterized in that a first set of silencer blade assemblies (3) is arranged between the air inlet (11) and the first silencing static pressure chamber (14), and a second set of silencer blade assemblies (3) is arranged between the first silencing static pressure chamber (14) and the second silencing static pressure chamber (15).

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