Ventilation system with noise silencer of underground structure
SUBSTANCE: system includes pit shaft with air-sound channels, ventilation and noise silencer chambers and ventilation stall. Stall is attached to pit shaft by means of the pipeline piece built in the building located above the underground structure. Between ventilation and noise silencer chambers there installed is elastic diaphragm with an opening.
EFFECT: reducing noise level by means of multi-staged silencing.
The invention relates to the field of energy and can be used, for example, in the construction of ventilation systems with maximum sound attenuation functions for the metro.
In cases where an underground structure, such as a metro station with ventilation shaft, placed in dense and densely populated urban development, it demands in respect of noise from the powerful underground ventilation units with an indispensable save space support device pertaining to the system of ventilation and noise control.
Known ventilation system with maximum sound attenuation functions of the subway, including installed near city buildings support ventilation kiosk with an external annular fence, lined inside shumoglushiteli casing by a considerable thickness to suppress mainly low-frequency sound vibrations (EN 2286459 C1).
The main drawback of this system is that even very large thickness of the barrier with shumoglushiteli the lining does not provide safe health soundproofing. This is due to the extension part of the low-frequency sound vibrations through the fence in a horizontal direction to the lower floors of the surrounding buildings and virtually unimpeded spread up high frequency sound is output fluctuations, reaching the upper floors of nearby buildings. Other disadvantages of such a system, it should be noted the awkwardness of the whole structure, occupying a large area near buildings. In addition, such a construction is expensive and time consuming in construction.
Also known ventilation system with maximum sound attenuation functions of the subway, including a shaft with an air-to-conductive channels, underground ventilation and somapochtaru camera and placed over the mine shaft ventilation kiosk (Estuaries Y.A. "the Subways". - M: all-Union NP Union of Ministry of Railways, 1960. S). This system is the closest solution of the present invention to the technical essence and the achieved result.
The main disadvantage of the last of the above known systems is the lack of efficiency in relation to suppress underground noise to safe health level near the ventilation kiosk. This is because the low-frequency component of the acoustic oscillations, we feel as monotonous drone, almost can not be suppressed to the required safe values in only one shumoglushiteli the camera, and in the case of entering into resonance with the design of the ventilation kiosk on the and may even lead to destruction of its elements.
The objective of the proposed solution is the creation of a ventilation system with maximum sound attenuation functions underground structures, the construction of which is devoid of the above disadvantages of the known kiosks.
The problem is solved in that in the system of ventilation and noise underground structures, including a shaft with an air - to-conductive channels, ventilation and somapochtaru camera and placed over the mine shaft ventilation kiosk, the latter is connected with the shaft barrel by means of additional air - conductive channel with rigid walls, still embedded in located above the underground construction of the building, between the ventilation and shumoglushiteli cameras installed aperture with the aperture.
In the task received a new technical result.
This result is to increase the degree of sound attenuation underground structures due to multi-stage suppression as low-frequency and high-frequency acoustic oscillations of the noise spectrum.
The essence of the invention and its advantages compared with the known technical solutions will become more clear and apparent from the following description of a specific example of implementation with reference to the accompanying drawing.
On the line is e is a schematic representation of a view in vertical section of the proposed ventilation system with maximum sound attenuation functions underground structures.
In this example, the ventilation system with maximum sound attenuation functions underground structure includes a shaft 1 with air-conductive channels 2. Shaft shaft 1 reported executed in horizontal openings 3 Plenum 4 and shumoglushiteli camera 5. In the ventilation chamber 4 is mounted on the ventilation unit 6. In shumoglushiteli the camera 5 is placed the muffler 7 delovogo type, assembled from blocks of highly porous claydite-concrete. Shumoglushiteli camera 5 is located closer to the surface of the earth in relation to the ventilation chamber 4. Between the vent 4 and shumoglushiteli 5 cameras still installed elastic diaphragm 8 with the aperture 9. As shown in the drawing, the diaphragm 8 is placed directly in the ventilation chamber 4. The thickness of the diaphragm 8, its material and the diameter of the aperture 9 pick experimentally depending on the particular noise spectrum generated by the ventilation unit 6.
Above the underground structure (part of which is represented in the drawing) placed high-rise residential or office building 10, on the roof which was built ventilation kiosk 11. In this example, the ventilation kiosk 11 is installed coaxially with the output of channel 2 of the shaft 1.
Ventilation kiosk 11 communicated with the shaft barrel 1 by means of the PTO additional air-conductive channel 12 with rigid walls 13, made in the form of a segment of steel pipeline, still embedded in the building 10.
The functioning of the ventilation system with maximum sound attenuation functions underground structures made using the invention is as follows.
Work with powerful ventilation units underground structures (in this case, metro) accompanied by the generation of sound waves of different frequencies, which is manifested in the noise effect on the output of the shaft 1.
In the case of exhaust underground ventilation air flow from the Plenum 4 extends through the channels 2 of the shaft 1 and the additional channel 12. Next, the air flow through the louvered grille ventilation kiosk 11 enters the atmosphere above the roof of the building 1.
The low-frequency component of the sound waves emanating from the ventilation unit 6, first produces a phase mismatch effects with the same frequency on the diaphragm 8,partially losing their energy. Later in shumoglushiteli chamber 5 these low-frequency sound vibrations to meet the viscous resistance of the porous material of the muffler 7, where their energy is additionally spent on the transformation into heat energy. Finally the residual energy of these waves passing through the additional channel 12 communicates with gettimestring 13 last in contact with the massive building 10, almost completely losing his energy. As a result of this three-step process damping of low-frequency sound waves in the noise spectrum around the air kiosk 11 almost don't feel the underground unpleasant hum.
High frequency component of the sound waves from the powerful working of the ventilation unit 6 first weakened as a result of pressure difference at the inlet and outlet openings 9 of the diaphragm 8. Next, high-frequency sound vibrations almost completely lose their energy when passing through the numerous pores of the material of the muffler 7. As a result, the output of the ventilation kiosk barely felt a sound like whistling.
Thus, through the above-described structural features of the invention, sound waves effectively suppressed to the required level without exerting harmful effects on people around the ventilation shafts underground.
Other positive features of the invention, it should be noted compactness placement of support structures, which is of great importance in the field of construction in big cities.
The following claims are only the essential features that are necessary and sufficient for solving the table the task with a new technical result.
As can be seen from the above, the set of essential features of the present invention actually provides a solution to the problem, namely the creation of a new ventilation system with maximum sound attenuation functions underground structures, providing a highly efficient insulation harmful to human health noise by a three-stage damping of low-frequency sound with the simultaneous implementation of the two-stage damping of high-frequency sound.
Ventilation system with maximum sound attenuation functions underground structures, including a shaft with an air-to-conductive channels, ventilation and somapochtaru camera and placed over the mine shaft ventilation kiosk, characterized in that the ventilation kiosk is connected with the shaft barrel by means of additional air-conductive channel with rigid walls, still embedded in located above the underground construction of the building, between the ventilation and shumoglushiteli cameras installed aperture with the aperture.
FIELD: machine building.
SUBSTANCE: invention refers to procedure of noise suppressing. The noise suppressor consists of a case, of inlet and outlet branches and of a sound absorber. The sound absorber includes a rigid wall. A profiled layer out of sound absorbing material is attached to this wall. Sound absorbing material is produced by alteration of semi-sphere or partially spherical surfaces so, that between the wall and the layer of sound absorbing material there are continuous intervals alternating with air intervals formed with semi-sphere. The profiled layer is also attached to a perforated element of the case. This profiled layer consists of sound absorbing material obtained at alternation of semi-sphere or partially spherical surfaces. This arrangement facilitates alteration of continuous and air gaps formed with semi-sphere between the perforated element of the case with acoustic transparent material and the layer of sound absorbing material. Also the profiled layer at the rigid wall is a mirror reflection of the profiled layer at the perforated element of the case relative to symmetry line 0-0 of the solid profiled layer.
EFFECT: increased efficiency of noise suppressing.
FIELD: machine building.
SUBSTANCE: invention refers to procedure of noise suppressing. The noise suppressor consists of case of rectangular cross section rigidly connected to inlet and outlet branches and of sound absorbing plates. The sound absorbing plates are made as a frame containing perforated sheets filled with sound absorber. The plates are arranged in the case at a specified step forming flat channels. Also each sound absorbing plate contains perforated walls. Sound absorbing profiled layers of triangular cross section out of sound absorbing material are attached to the perforated walls and are arranged opposite to them; this arrangement ensures an air gap between the profiled layers. Notably, a recess of one layer opposes projection of another. Surfaces of profiles are congruent and are arranged with a shift at value equal to half of length of triangle base.
EFFECT: increased efficiency of noise suppressing.
FIELD: machine building.
SUBSTANCE: noise suppressor is designed for damping noise. The noise suppressor consists of a case of rectangular cross section rigidly tied with end inlet and outlet branches and of noise absorbing plates. The noise absorbing plates are arranged in the case at a certain step, forming flat channels in the case. Each noise absorbing plate contains perforated walls. A noise absorbing profiled layer is inserted between the walls; depending on density, the layer is either made as a solid element, for example by sintering or pressure moulding, or is composed out of two noise absorbing profiled layers. Each of these profiled layers is produced by alternating semi-spherical surfaces or surfaces of part of sphere so, as to facilitate alternation of continuous and air intervals between the perforated wall and the layer of noise absorbing material. Also the noise absorbing profiled layer at one perforated wall is a mirror reflection of the profiled layer at another perforated wall relative to symmetry line 0-0 of the continuous profiled layer. The layers merge to ensure location of a recess of one layer opposite to the recess of another and a projection of one layer opposite to projection of another.
EFFECT: increased efficiency of noise suppressing.
SUBSTANCE: device contains casing, which allows inlet-pipe connection for air and exhaust branch for air and in inner space of which it is placed device for change of air direction, between inlet and exhaust branches for air it is located pass approximately vertically divide wall, which divide inner space for two chambers, separated by drain port.
EFFECT: compactness and small loses of pressure.
4 cl, 2 dwg
SUBSTANCE: box is designed for ventilation shaft of the subway. The box includes a headgear construction with air-conducting windows and external barrier in the form of ring-shaped shield. The shield is made in the form of cone widening upward and of amorphous material, and the inner surface of which is coated with a protective coating with sound reflecting inner surface. There is a through clearance between the shield and headgear construction.
EFFECT: sound reduction.
3 cl, 1 dwg
FIELD: instrument engineering.
SUBSTANCE: device, system and method aim at generation of column air flow. An air handling device comprises a body, an in-built driving wheel that generates downward air flow and in-built blades mounted in close proximity to the driving wheel at specified distance and serving to generate straight-line air flow. The device generates air flow that essentially holds column shape at the considerable distance. The method consists in generating air flow that essentially holds column shape at the considerable distance and is directed from ceiling to floor to mix air layers of air of various temperatures in an enclosed air space. Besides, the method consists that warm air directed from ceiling to floor accumulates thermal energy in floor, in devices being thereon and thereunder. If ceiling is colder than floor, accumulated energy is released.
EFFECT: reduced power consumption and noise level.
32 cl, 24 dwg
FIELD: heating systems.
SUBSTANCE: device is intended for air supply to the room and/or air discharge from the room. Device consists of the housing which has an air inlet and outlet and in the inner space whereof there provided is the air direction changing device. Housing consists of two covers which enclose the air direction changing device made in the form of a plate.
EFFECT: providing effective air supply to the room and/or air discharge therefrom.
12 cl, 3 dwg
FIELD: heating systems.
SUBSTANCE: invention refers to ventilation systems of rooms, and namely to natural plenum ventilation devices. Device consists of an air-intake branch pipe to be installed in the building wall opening and closed with an intake grid on the external edge. Device is equipped with an adjustable damper and filter. Device is equipped with the air pipeline connected to the air-intake branch pipe, and that air pipeline is installed along inner side of the building wall and located near the heating radiator or at least partially after the heating radiator. In the wall of the additional air pipeline there made is at least one air exhaust window or perforation supplying the air flow to the radiator, and adjustable shutter and filter is located in the additional air pipeline. In addition, the device can include a noise absorber. The latter shall be preferably installed in the additional air pipeline, and namely before adjustable shutter and filter as to air flow. Labyrinth-shaped noise absorber is preferable as well.
EFFECT: providing the possibility of heating the inlet air owing to air flow supply to the heating radiator.
5 cl, 1 dwg
FIELD: physics; heating.
SUBSTANCE: suppressor is intended for decrease of aerodynamic noise in air ducts of mechanical ventilation and air conditioning systems. Suppressor contains the body in cavity of which there are mounted acoustic dissipation elements pairwise contacting at inlet, forming tapering air passage channels and provided with convex fairings in contact points, as well as swing-out mechanism consisting of levers and control rods rigidly mounted at end faces of acoustic dissipation elements by washers and cotters.
EFFECT: higher efficiency of noise suppression within all the operation modes of ventilation and air conditioning systems.
FIELD: the booth is assigned for ventilation of the shaft of the Metro.
SUBSTANCE: the booth includes an above the shaft building with air passing windows and an external barrier in the shape of a ring-type housing. The housing is fulfilled in the shape of a expanding upwards funnel with sound reflecting surface. A hollow gap is between the housing and the above the shaft building.
EFFECT: reduces noise levels with the aid of a single element out of sheet material.
SUBSTANCE: invention relates to mining, in particular - to a method for removal of dust and gas from the breakage heading in case of room-and-pillar development system. It involves supply of fresh air to the bottomhole zone with a draught source generating a vortical circulation circuit. On the one side of the circuit one performs supply of fresh air while on the other side one performs removal of contaminated air from the bottomhole zone. The draught source is placed in the bottomhole zone. It creates the first circuit of circulation vortical motion and generates a directed air flow, contaminated with dust and gas, along the wall of the excavation opposed to the miners' workplaces. At the spot of the first vortical circulation circuit connection to the following vortical circuit a linkage is driven that connects the excavation wherein cleaning works are performed to the exhausted chamber. An additional draught source installed in the exhausted chamber may be equipped with an air duct.
EFFECT: method enables intensification of ventilation in an excavation wherein cleaning works are performed and miners are present and at the place of connection of vortical circulation circuits where occurs accumulation of dust and gas clouds which improves sanitary and hygienic conditions of mining workers labour.
2 cl, 1 dwg
SUBSTANCE: invention refers to mining and can be implemented at coal mines during development edge and steeply pitching beds of coal by hydro-cutting. The procedure consists in exposing extraction field, in dividing it to extraction blocks, in leaving inter-block coal solids, in exposing extraction blocks with ventilation and accumulating crosscuts, in driving load handling slopes, ventilation furnaces and pulp furnaces, in dividing extraction blocks to stories, in driving story extraction drifts, and in mining stories of extraction blocks with a system of story hydro-cutting by passes along strike from story extraction drifts and facilitating rock falling in stripped area. Mining of stories is performed in a descending order. Exposure of extraction field is carried out at flanks with ventilation and accumulating crosscuts wherefrom coal is extracted from solids with the system of extraction; also stripped area is stowed with non-combustible fill; the solid functions as a protection for crosscuts forming a barrier solid. Block mining within ranges of an extraction pillar is performed successively starting from a mining block adjoining the formed barrier solid. Along the whole length of the extracting pillar inter-block coal solids are mined together with stories of adjacent mined extraction blocks.
EFFECT: increased safety of miners labour due to elimination of endogenous fires and increased efficiency owing to extraction of inter-block coal solids.
FIELD: technological processes.
SUBSTANCE: invention may be used in mining industry. Separator intended for separation of coal bed gases is placed in cavity of mine. Hydrocarbons separated in separator are exhausted via gas line, and volume of gases discharged from mine is substituted with atmospheric air. Separator comprises body with nozzle of gas inlet 14, nozzle of light gas discharge 12 and nozzle of heavy has discharge 1, engine 20. In toroidal cavity 5 of separator body there is radial-axial centrifugal compressor installed with hollow blades, in which frontal slots 1 and rear slots 2 are provided. Propeller 10 is fixed on tubular extension of shaft 11. To inner surface of propeller 10 there are blades of radial-axial centripetal compressor 9 fixed.
EFFECT: efficient separation of heavy and light gases, reduction of power inputs for air conditioning in mine.
3 cl, 6 dwg, 2 tbl
SUBSTANCE: previously frame is prepared for heating with the help of flexible heating element, which is arranged along perimetre of outer or inner surface of frame with fixation on it. Afterwards heating element via terminal box arranged inside connecting box is connected to sensor for control of air temperature supplied to area of frame location. Sensor is connected to source of power supply. Area of sensor location together with connecting box is a section of frame, towards which largest part of cold atmospheric air flow is directed in process of reverse. Under conditions of negative temperatures, prior to reversing of ventilation jet at specified time by actuation of air temperature control sensor, heating element is connected to source of power supply, providing for preheating of supply channel folding door frame. As ventilation jet is reversed with supply of cold atmospheric air, channel folding door is transferred to position of reverse mode with the possibility of adjacency to heated frame. At the same time frame heating is continued, and heat is transferred from frame to folding door, preventing its icing. As time of ventilation jet reversing elapses, frame heating is stopped by de-energising of heating element. Then since channel folding door will not freeze to frame, it is freely changed into initial position. Prevents icing of folding door in supply channel during ventilation jet reversing under conditions of negative temperatures.
EFFECT: heating of supply channel folding door as it adjoins heated frame in reverse mode position.
6 cl, 4 dwg
SUBSTANCE: invention refers to the sphere of mining industry and may be used in mines ventilation. Method for automatic regulation of temperature of air supplied in mine includes application of geothermal heat of mine pumping water, at the same time pipe of pumping with radiators for increase of heat exchange area between water and air is pulled through surface tunnel with length of 30-50 m, arranged in front of heater, moreover, pipe is arranged with at least two turns and is installed with a permanent inclination of at least 0.02 along with water flow.
EFFECT: method makes it possible to considerably save thermal energy in winter and to cool hot air down in summer.
FIELD: oil-and-gas production.
SUBSTANCE: providing of stability of well walls, process controllability of opening of waterbearing formation of operation of two waterbearing formations of one upward drain borehole has become possible ensured by creation of backpressure in annular space of well during all time of its drilling in incompetent rocks and also usage in particular case in the capacity of intermediate string of filtering pipe string. Device for opening of waterbearing stratums in incompetent rocks by upward drain borehole includes drilling rig, rotator, main mud pump, drilling assembly, intermediate string, filtering pipe string and equipment of wellhead, containing conductor, wellhead mandrel, pipes grab, gland, closing sleeve, outlet and shutter. Intermediate string is outfitted by ring, rigidly installed to it at bottom end with ability of installation of sealing ring for overlapping of annular gap between conductor and intermediate string. Device is outfitted by additional boring pump, connected to outlet of wellhead mandrel, and also by nozzle installed at outlet of this branch diametre of which depends on static level of waterbearing formations at wellhead and rotary crane for passing of water into outlet from additional drilling pump.
EFFECT: providing of ability of additional water removing.
3 cl, 4 dwg, 2 ex
FIELD: oil-and-gas production.
SUBSTANCE: stowing mixture contains, wt %: halite wastes of reprocessing of potassic ores 96.5-98.3, bonding agent - magnesia cement 1-2, lignosulfonate 0.7-1.5%.
EFFECT: achievement of required strength of backfilling at minimal content of bonding agent.
1 tbl, 1 dwg
SUBSTANCE: method involves heating of ambient air with flue gases coming from fuel combustion chamber, its supply to the mine through ventilation system. Hot air addition is dosed to ventilated air flow directly to suction channel of the main mine ventilation fan. Secondary blasting is used in combustion chamber. Secondary air is heated in convection jacket of side walls of combustion chamber. In outlet gas duct there used is cold air blast which is directed upwards at an angle not less than 45°. Fuel combustion chamber is equipped with outside located secondary air fans and inclined slit atomisers provided in side walls. External surface of side walls of fuel combustion chamber is equipped with convection jacket. Gas burners are located in ceiling part of fuel combustion chamber. Mine air heating is improved by preventing flue gas penetration into ventilation flow supplied to the mine.
EFFECT: increasing air-heating plant efficiency owing to complete fuel combustion, decreasing metal consumption of air pipeline.
4 cl, 3 dwg
SUBSTANCE: invention refers to mining industry, and namely to the method used for hydraulic filling of long single mine workings. It involves influence of retaining and filtering connection straps, installation of pulp pipeline, and supply of filling pulp. Water is drained via drain holes made in connection straps installed on the side opposite to the pulp supply. Filling pulp is supplied to the filled area via pulp pipeline with the holes made in lower part, which is attached to the roof of mine working throughout its length. The holes made at the beginning of the pipeline are equipped with petal valves.
EFFECT: increases the filling degree of the worked-out area in hard-to-reach sections.
2 cl, 2 dwg
SUBSTANCE: invention is related to mining industry, namely to method for preparation of stowing mix. Tails of dressing works are sent to several stowing complexes with application of hydraulic transport system, comprising working and drain branches. Tails are separated in each stowing complex into condensed product sent for preparation of stowing mix and lightened discharge. Working and drain branches of hydraulic transport system are separated. Tails from working branch are sent to each stowing complex, and lightened discharge is drained to drain branch. End part of working branch and beginning of drain branch in hydraulic transport system are joined by emergency bridge comprising stop valves. Each stowing complex newly added to system of hydraulic transport is duplicated with emergency bridge. System of hydraulic transport includes several separated working and drain branches, which service groups of stowing complexes that vary in number. Working and drain branches of hydraulic transport system for sending of tails to several groups of stowing complexes may be combined into headers.
EFFECT: provision of stable high quality of mines stowing, increased efficiency and safety of mining works, lower costs for preparation of stowing mix and transportation of dressing works tails in servicing of several mines.
7 cl, 8 dwg, 1 ex
FIELD: mining industry.
SUBSTANCE: pipeline has sections made in form of hermetically interconnected outer and inner covers, mounted with space relatively to each other, and main ventilator. On different ends of pipeline flow meter and additional ventilator are mounted, the latter having adjustable characteristics and being connected to inter-pipe space by branch pipe. In inner cover apertures are made placed along radius and along length of cover. Air comes from apertures to air channel and forms additional air flow near walls of inner cover, which lowers or heightens aerodynamic resistance of ventilation pipeline.
EFFECT: higher efficiency, higher safety, lesser costs.