CN212583739U - Ventilation and heat insulation system for underground excavation subway station in alpine region - Google Patents

Abstract

The utility model discloses a ventilation and heat preservation system for underground excavation subway stations in alpine regions, which comprises an air pipe assembly, a heating pipeline, a temperature sensor, a fixed assembly, a sealing assembly and an axial-flow type ventilator; the air pipe assembly comprises a main pipeline, a branch pipeline and a connecting pipeline, the main pipeline and the branch pipeline are communicated through the connecting pipeline, the main pipeline, the branch pipeline and the connecting pipeline are sealed through a sealing assembly, the air pipe assembly is fixed to the cavern through a fixing assembly, the axial-flow type ventilator is communicated with the air inlet end of the main pipeline, the heating pipeline is arranged on the main pipeline, the temperature sensor is electrically connected with the heating pipeline, and when the indoor temperature of the cavern is lower than a set value, the heating pipeline is automatically started to heat cold air. The ventilation and heat insulation system for the underground excavated subway station in the alpine region can automatically heat cold air entering the air pipe assembly by arranging the heating pipeline on the air pipe assembly, so that the stability of construction temperature in the station is guaranteed.

Description

Ventilation and heat insulation system for underground excavation subway station in alpine region

Technical Field

The utility model relates to a track traffic construction technical field particularly, relates to an alpine region secretly digs subway station ventilation heat preservation system.

Background

When the underground excavation station of the subway is constructed in the alpine region in winter, because the external environment temperature is low, the fresh air is pressed in to quickly reduce the construction environment temperature in the station, the construction influence caused by low temperature is more obvious, and the construction safety, quality and progress are directly influenced. The high and cold area refers to an area with high altitude and permafrost or a high latitude severe cold climate area, and is mostly seasonal frozen soil, and construction is performed in winter. The ventilation requirement of the station and the heat preservation requirement in the station are mutually contradictory, and the reduction of the temperature has great influence on the construction quality of the concrete and the sprayed concrete of the underground excavated station of the subway. Specifically, the main sources of the construction environment temperature of the underground excavation station of the subway are the surrounding rock geothermal energy, the heat release of construction machinery equipment, the heat release of lighting equipment, the heat release of concrete hydration heat and the heat release of human bodies of construction operators, and the mechanical ventilation is favorable for adjusting the construction environment temperature in the station and reducing the construction operation environment temperature when the external temperature is in a normal temperature state. However, in the severe cold area, when the outside temperature reaches below 0 ℃, the fresh air sent into the station will quickly reduce the construction environment temperature in the station, so that the difficulty of maintaining the originally low temperature in the station at the construction environment temperature of above 5 ℃ in the winter period is quite large, and the normal operation of concrete and concrete spraying engineering can be ensured by considering the fact that warm air is sent into the station.

In the prior art, a lot of researches are made on ventilation and smoke discharge in the construction of a tunnel in a long or extra-long mountain, and an environment heating method is generally adopted, wherein the following three methods are mainly adopted: the first, boiler heating air heating technology, its principle is to utilize the boiler to heat up and provide the heat source (steam or hot water), the manufacturer purchases SRL type or SRZ air heater (principle and radiator heating), heat up for the regional ambient air heating in the tunnel; secondly, a heating technology of a warm air blower is adopted, saturated steam or electric heat is adopted as a heating medium, and the temperature of the air in the area of the tunnel is heated; third, ventilation air heating technique utilizes axial-flow fan and carries out the ventilation heating pipe that heats to the cold wind that sends into in the tunnel, reaches the purpose of entering hole air heating, and at present, to the study of the secretly excavated subway station construction ventilation of severe cold district and discharge fume not have relevant report yet, the utility model discloses still belong to the first time.

For example, the chinese patent utility model publication No. CN105134278B discloses a ventilation and temperature rise system and a ventilation and temperature rise construction method for a tunnel in a high altitude and high cold area, wherein the ventilation and temperature rise system includes an axial flow fan, an air duct, and a ventilation and temperature rise pipe for heating cold air fed into the tunnel; the ventilation heating pipe is arranged on the air pipe and comprises a circular heating pipe, an air outlet and an air inlet, and the circular heating pipe comprises an outer steel pipe, an inner steel pipe and a ventilation heating device arranged in the inner steel pipe; the ventilation and temperature rise construction method comprises the following steps: firstly, mounting an axial flow fan; secondly, tunnel excavation and heating ventilation construction: in the tunnel excavation work process, adopt the axial-flow fan to carry out the forced ventilation to adopt the ventilation heating pipe to heat the cold wind that sends into through the axial-flow fan. The utility model discloses a reasonable in design, construction convenience and excellent in use effect can solve easy quilt that current tunnel environment intensification method exists and influence tunnel construction, heating effect relatively poor, can not satisfy the heating demand scheduling problem under the low temperature environment.

For another example, chinese patent publication is CN 205277471U's utility model discloses a ventilation system for plateau alpine tunnel construction, to constructing the problem that meets under the cold injury and the thin adverse circumstances of air in alpine and alpine altitude tunnel at present, this utility model discloses a ventilation system suitable for plateau alpine tunnel construction, this plateau alpine tunnel construction ventilation system, including setting up in the tunnel or outer fan, the fan of this system is connected with the ventilation pipeline, the vent of this ventilation pipeline sets up in the tunnel, the length of this ventilation pipeline matches with the length in tunnel, this system still include with heat device and to the oxygenation ventilation system of increasing oxygen content and ventilation pipeline connection in the construction tunnel. This ventilation system of plateau alpine tunnel construction simple structure, easily operation can heat the effect and make oxygen the effect and install simultaneously on a ventilation system, and the construction unit of being convenient for deals with different environment and adjusts, facilitates under the abominable tunnel environment construction conditions such as plateau alpine for the construction unit.

The prior art has at least the following problems:

in the prior art, the three tunnel environment heating technologies and corresponding equipment have defects and shortcomings in different degrees, wherein the first two types of heating methods can only heat a local area in a tunnel, cannot meet the requirement of large-area heating in a low-temperature environment, and equipment is easy to collide and affect construction in a narrow space in the tunnel; the third heating method adopts a boiler house to provide a heat source outside, has large pollution and more configuration personnel, and has poor heating effect in the tunnel face construction area due to overlarge heat energy conveying distance, large process heat dissipation loss and large tunnel tunneling depth.

Aiming at the problems that the construction environmental conditions of the existing underground excavation subway station are poor, the air quality cannot be guaranteed, and the influence on the health of construction operators is large, an effective solution is not provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a severe cold district secretly digs subway station ventilation heat preservation system.

The ventilation and heat insulation system for the underground excavated subway station in the alpine region comprises an air pipe assembly, a heating pipeline, a temperature sensor, a fixing assembly, a sealing assembly and an axial-flow type ventilator; the tuber pipe subassembly includes the trunk line, prop up trunk line and connecting tube, trunk line and prop up the trunk line and pass through the connecting tube intercommunication, the trunk line, prop up the trunk line, it is sealed through seal assembly between the connecting tube, the trunk line, prop up the trunk line, the connecting tube is all fixed with the cavern installation through fixed subassembly, axial-flow fan communicates with the air inlet end of trunk line, the heating tube is located on the trunk line, temperature sensor locates on the lateral wall of cavern, temperature sensor and heating tube electric connection, when the indoor temperature of cavern is less than the setting value, the automatic start heating tube heats the cold air, the hot-air after the heating tube heating is in proper order through the trunk line, the connecting tube, prop up the trunk line and send to the cavern in.

Furthermore, the main pipeline is composed of a plurality of main air pipes, any two adjacent main air pipes in the plurality of main air pipes are fixedly connected through a sealing assembly, each main air pipe in the plurality of main air pipes is fixedly installed with the cavern through a fixing assembly, and the heating pipeline is arranged in the plurality of main air pipes; the branch air pipe is composed of a plurality of branch air pipes, any two adjacent branch air pipes in the plurality of branch air pipes are fixedly connected through a sealing assembly, and each branch air pipe in the plurality of branch air pipes is fixedly installed with the cavern through a fixing assembly; the connecting pipeline is L-shaped, the middle part of the connecting pipeline is in arc transition, and two ends of the connecting pipeline are respectively fixed with the main air pipe and the branch air pipes in a sealing mode through the sealing assemblies.

Further, the seal assembly includes: the sealing device comprises a first sealing element, a second sealing element, a step bulge, a step groove, a first clamping groove, a second clamping groove, a third sealing element and a corner protector; the first clamping groove used for clamping the first end of the sealing assembly is formed in the first sealing element, the second clamping groove used for clamping the second end of the sealing assembly is formed in the second sealing element, the right side of the first sealing element is provided with a step protrusion, the left side of the second sealing element is provided with a step groove corresponding to the step protrusion, the step protrusion is arranged in the step groove, the third sealing element is of an Contraband type structure, the third sealing element is clamped on the first sealing element and the second sealing element, and the corner protector is clamped at the corner of the air pipe assembly.

Further, the fixing assembly includes: the first rivet, the first connecting plate, the connecting round hole, the first fixing plate, the threaded hole, the screw rod, the second fixing plate, the through hole, the second connecting plate, the square groove and the second rivet; the first connecting plate is riveted at the top of the cavern through a first rivet, a connecting round hole is arranged on the first connecting plate, the first fixing plate is L-shaped, the first end of the first fixing plate passes through the connecting round hole to be fixedly connected with the first connecting plate, the second end of the first fixing plate abuts against the lower end of the air pipe component, the second end of the first fixing plate is provided with a threaded hole, the second fixing plate is L-shaped, the second end of the second fixing plate is provided with a through hole, the first end of the screw rod is clamped on the second fixing plate, the second end of the screw rod passes through the through hole to extend into the threaded hole, the second connecting plate is riveted on the cavern through a second rivet, a square groove is arranged on the second connecting plate, the first end of the second fixing plate passes through the square groove to be movably connected with the second connecting plate, the second end of the second fixing plate abuts against the lower end of the air pipe component, when the screw rod is, so that the air pipe component and the cavity are clamped and fixed.

Further, the heating duct includes: the device comprises a heating air pipe, a plurality of heaters, a protective layer, a first heat-insulating layer, a second heat-insulating layer and a PLC (programmable logic controller); the heating air pipe sets firmly on the main pipe way, the both ends of heating air pipe are passed through seal assembly and are fixed with the main pipe way is sealed, a plurality of heater equipartition is on the outside surface of heating air pipe, the protective layer cladding is on a plurality of heater, first heat preservation cladding is on the protective layer, the cladding of second heat preservation is on first heat preservation, the protective layer, first heat preservation, it has the wiring mouth to reserve on the second heat preservation, the cable passes through wiring mouth and a plurality of heater electric connection, the PLC controller respectively with temperature sensor and a plurality of heater electric connection.

Further, severe cold district secretly digs subway station ventilation heat preservation system still includes filtering duct, and filtering duct includes: the filter air pipe comprises a filter air pipe, a first fairing, a first ventilating pipe, a blower, a second ventilating pipe, a second fairing, a plurality of filter plates and a plurality of clamping pins; the filtering air pipe is fixedly arranged on the branch pipeline, two ends of the filtering air pipe are fixedly sealed with the branch pipeline through a sealing component, the left end of the first fairing abuts against the inner wall of the filtering air pipe, the right end of the first fairing is communicated with the first end of the first ventilation pipe, the second end of the first ventilation pipe is communicated with the first end of the air blower, the second end of the air blower is communicated with the first end of the second ventilation pipe, the second end of the second ventilation pipe is connected with the left end of the second fairing, the right end of the second fairing abuts against the inner wall of the filtering air pipe, the left end of the first fairing is larger than the right end of the first fairing, the left end of the second fairing is smaller than the right end of the second fairing, a plurality of filter plates are fixedly arranged on the inner wall of the filtering air pipe on the right side of the second fairing, and each filter plate in the plurality of filter plates is fixedly connected with the filtering air pipe through one clamping pin in the plurality of, and a plurality of filter plates are arranged on the inner wall of the filtering air pipe in a staggered manner.

Compared with the prior art, alpine region secretly dig subway station ventilation heat preservation system have following superior effect that is showing:

1. through setting up heated tube on the tuber pipe subassembly for when the temperature is less than winter construction temperature in the station, through temperature sensor automatic control function, can carry out the self-heating to the cold air that gets into the tuber pipe subassembly in heated tube department, ensured the stability of the construction temperature of each construction face in the station, improved the construction effect.

2. Through designing seal assembly for unsmooth complex sealed form for the air in the tuber pipe subassembly is at the quick flow in-process, because excessive passageway is tortuous, increases, seal assembly's sealing performance has obtained great promotion, sets up the third sealing member of angle bead and Contraband type structure in the bight of tuber pipe subassembly simultaneously, further promotion seal assembly's sealing performance, and then improved ventilation efficiency.

3. The construction of the station platform layer is mainly carried out by pressing-in ventilation, the construction of the station hall layer is mainly carried out by drawing-out ventilation, and the whole station forms mixed ventilation, so that the air quality in the station can reach a good state.

4. Through the setting of fixed subassembly for according to the size of the tuber pipe subassembly of difference, fixed subassembly can adjust at any time, and strong adaptability has ensured the fixed effect of fixed subassembly, and then makes the stability of tuber pipe subassembly improve, is difficult for the pine to take off, and life improves.

5. Through filter assembly's setting for the air that gets into in the station has obtained further filtration, and in addition, the dirty air that is located the station filters dirty air through filter assembly when appearing pouring into the air duct subassembly backward, has ensured the cleanliness and the interior constructor's of underground excavation subway station ventilation heat preservation system in alpine region health.

6. Through set up a plurality of sub-axial-flow fan on the branch trunk line way, and then improved the air exchange efficiency between tuber pipe subassembly and station room layer, the platform layer, simultaneously, also be convenient for carry out the switching of pressure wind mode or convulsions mode, make alpine region undercut subway station ventilation heat preservation system's flexibility, functionality improve greatly.

7. The utility model discloses the complicated ventilation system of discharging fume of application PTC heated tube way, temperature sensor automatic control system of heating, filtration purifier and crowd's cavern has effectively solved the undercut station construction environmental condition poor, and the difficult problems such as temperature is low, air quality is poor in the construction winter, has ensured that undercut station engineering construction quality and construction operation personnel are healthy, has improved the efficiency of construction, has shortened construction period.

Drawings

FIG. 1 is a plan view of a ventilation stage of a ventilation system for a tunnel guide construction of a subsurface subway station in a severe cold region;

fig. 2 is a plan view of a station hall layer construction ventilation stage of the ventilation and heat preservation system for the underground excavated subway station in the alpine region of the present invention;

fig. 3 is a station hall layer extraction type ventilation plane layout diagram in the station layer construction ventilation stage of the ventilation and heat preservation system for the underground excavated subway station in the alpine region of the present invention;

fig. 4 is a station floor pressed-in ventilation plane layout diagram of the station floor construction ventilation stage of the ventilation and heat preservation system for the underground excavated subway station in the alpine region of the present invention;

fig. 5 is a schematic structural view of a sealing assembly of the ventilation and heat preservation system for the underground excavated subway station in the alpine region of the present invention;

fig. 6 is a schematic structural view of a corner protector of a sealing assembly of the ventilation and heat insulation system for underground excavated subway stations in alpine regions according to the present invention;

fig. 7 is a schematic structural view of the filter pipeline of the ventilation and heat preservation system for the underground excavated subway station in the alpine region of the present invention;

fig. 8 is a schematic structural view of a fixing component of the ventilation and heat preservation system for the underground excavated subway station in the alpine region of the present invention;

fig. 9 is the utility model discloses alpine region secretly digs subway station ventilation heat preservation system's hot oil line's schematic structure view.

Description of reference numerals:

1-an air pipe assembly, 11-a main pipeline, 12-branch pipelines and 13-connecting pipelines; 2-heating pipeline, 21-heating air pipe, 22-heater, 23-protective layer, 24-first heat preservation layer, 25-second heat preservation layer and 26-heat dissipation cavity; 3-fixing component, 31-first rivet, 32-first connecting plate, 33-second rivet, 34-first fixing plate, 35-threaded hole, 36-screw rod, 37-second fixing plate, 38-through hole, 39-second connecting plate and 310-square groove; 4-seal assembly, 41-first seal, 42-second seal, 43-step projection, 44-step groove, 45-first card slot, 46-second card slot, 47-third seal, 48-corner protector, 49-third card slot; 5-a filtering pipeline, 51-a filtering air pipe, 52-a first fairing, 53-a first ventilating pipe, 54-a blower, 55-a second ventilating pipe, 56-a second fairing, 57-a filtering plate and 58-a clamping pin; 6-axial flow ventilator; 7-a vertical shaft; 8-a transverse channel; 9-guiding the hole; 10-a pipe column; 14-station hall layer; 15-a platform layer; 16-sub-axial flow ventilator; 17-station entrance and exit; 18-inlet and outlet branch pipe.

Detailed Description

The invention is described in further detail below with reference to the drawings and the detailed description.

As shown in fig. 1 to 9, the ventilation and heat preservation system for the underground excavated subway station in the alpine region includes an air duct assembly 1, a heating duct 2, a temperature sensor (not shown in the figure), a fixing assembly 3, a sealing assembly 4 and an axial-flow ventilator 6; the air pipe assembly 1 comprises a main pipeline 11, a branch pipeline 12 and a connecting pipeline 13, the main pipeline 11 is communicated with the branch pipeline 12 through the connecting pipeline 13, the main pipeline 11, the branch pipeline 12 and the connecting pipeline 13 are sealed through a sealing assembly 4, the main pipeline 11, the branch pipeline 12 and the connecting pipeline 13 are fixedly installed with the cavern through a fixing assembly 3, an axial-flow fan 6 is communicated with an air inlet end of the main pipeline 11, a heating pipeline 2 is arranged on the main pipeline 11, a temperature sensor is arranged on the side wall of the cavern and electrically connected with the heating pipeline 2, when the temperature in the cavern is lower than a set value, the heating pipeline 2 is automatically started to heat cold air, hot air heated by the heating pipeline 2 is sequentially sent into the cavern through the main pipeline 11, the connecting pipeline 13 and the branch pipeline 12, and the cavern comprises a vertical shaft 7, The cross passage 8, the pilot tunnel 9, the station hall layer 14, the station platform layer 15 and the station passageway 17.

Further, the model of the axial-flow fan 6 is SDF-9, the power of the axial-flow fan 6 is 2 × 75kw, and the axial-flow fan 6 is a low-noise environment-friendly fan with a silencer.

Further, as shown in fig. 1 to 9, the main duct 11 is composed of a plurality of main air ducts (not shown in the figure), any adjacent two of the plurality of main air ducts are fixedly connected through a sealing component 4, each of the plurality of main air ducts is fixedly installed with the cavern through a fixing component 3, and the heating duct 2 is arranged in the plurality of main air ducts; the branch air duct 12 is composed of a plurality of branch air ducts (not shown in the figure), any two adjacent branch air ducts in the plurality of branch air ducts are fixedly connected through the sealing component 4, and each branch air duct in the plurality of branch air ducts is fixedly installed with the cavern through the fixing component 3.

Furthermore, the connecting pipeline 13 is L-shaped, the middle part of the connecting pipeline 13 is in arc transition, and two ends of the connecting pipeline 13 are respectively fixed with the main air pipe and the branch air pipe in a sealing manner through the sealing component 4.

Further, as shown in fig. 5 and 6, the seal assembly 4 includes: a first seal 41, a second seal 42, a stepped projection 43, a stepped groove 44, a first catching groove 45, a second catching groove 46, a third seal 47, and a bead 48; the first sealing element 41 is provided with a first clamping groove 45 for clamping the first end of the sealing assembly 4, the second sealing element 42 is provided with a second clamping groove 46 for clamping the second end of the sealing assembly 4, the right side of the first sealing element 41 is provided with a step bulge 43, the left side of the second sealing element 42 is provided with a step groove 44 corresponding to the step bulge 43, the step bulge 43 is arranged in the step groove 44, the third sealing element 47 is of an Contraband-shaped structure, the third sealing element 47 is clamped on the first sealing element 41 and the second sealing element 42, the corner protector 48 is clamped at the corner of the air duct assembly 1, the inner side of the corner protector 48 is provided with a third clamping groove 49 for accommodating the corner of the air duct assembly 1, and the first sealing element 41, the second sealing element 42, the third sealing element 47 and the corner protector 48 are all made of rubber.

Further, as shown in fig. 8, the fixing member 3 includes: the first rivet 31, the first connecting plate 32, the connecting round hole, the first fixing plate 34, the threaded hole 35, the screw 36, the second fixing plate 37, the through hole 38, the second connecting plate 39, the square groove 310 and the second rivet 33; the first connecting plate 32 is riveted at the top of the cavern by a first rivet 31, a connecting round hole is arranged on the first connecting plate 32, the first fixing plate 34 is L-shaped, the first end of the first fixing plate 34 passes through the connecting round hole to be fixedly connected with the first connecting plate 32, the second end of the first fixing plate 34 is abutted against the lower end of the air duct component 1, the second end of the first fixing plate 34 is provided with a threaded hole 35, the second fixing plate 37 is L-shaped, the second end of the second fixing plate 37 is provided with a through hole 38, the first end of the screw rod 36 is clamped on the second fixing plate 37, the second end of the screw rod 36 passes through the through hole 38 to extend into the threaded hole 35, the second connecting plate 39 is riveted on the cavern by a second rivet 33, a square groove 310 is arranged on the second connecting plate 39, the first end of the second fixing plate 37 passes through the square groove 310 to be movably connected with the second connecting plate 39, and the second end of the second fixing, when the screw 36 is screwed, the first fixing plate 34 is close to the second fixing plate 37 in horizontal distance, so that the air duct assembly 1 is clamped with the cavity.

Further, as shown in fig. 9, the heating duct 2 includes: a heating air pipe 21, a plurality of heaters 22, a protective layer 23, a first heat-insulating layer 24, a second heat-insulating layer 25 and a PLC (programmable logic controller) (not shown in the figure); the heating air duct 21 is fixedly arranged on the main duct 11, two ends of the heating air duct 21 are sealed and fixed with the main duct 11 through the sealing component 4, the plurality of heaters 22 are uniformly distributed on the outer surface of the heating air duct 21, the protective layer 23 is coated on the plurality of heaters 22, a heat dissipation cavity 26 is formed between the protective layer 23 and the heating air duct 21 and surrounds the plurality of heaters 22, the first heat preservation layer 24 is coated on the protective layer 23, the second heat preservation layer 25 is coated on the first heat preservation layer 24, the protective layer 23, the first heat preservation layer 24 and the second heat preservation layer 25 are provided with wiring ports in advance, a cable is electrically connected with the plurality of heaters 22 through the wiring ports, the PLC is electrically connected with the temperature sensor and the plurality of heaters respectively, the PLC is electrically connected with the temperature sensor and the plurality of heaters 22 respectively, specifically, the PLC is connected with the plurality of heaters 22 in parallel, the heater 22 is a PTC heater, the first heat-insulating layer 24 is made of asbestos plates, the second heat-insulating layer 25 is made of rock wool, and the protective layer 23 is made of iron sheets.

Further, as shown in fig. 7, the ventilation and heat preservation system for the underground excavated subway station in the alpine region further comprises a filtering pipeline 5, wherein the filtering pipeline 5 comprises: the filter air duct 51, the first fairing 52, the first ventilating duct 53, the blower 54, the second ventilating duct 55, the second fairing 56, a plurality of filter plates 57 and a plurality of clamping pins 58; the filtering air pipe 51 is fixedly arranged on the branch pipe 12, two ends of the filtering air pipe 51 are fixedly sealed with the branch pipe 12 through a sealing component 4, the left end of the first fairing 52 is abutted against the inner wall of the filtering air pipe 51, the right end of the first fairing 52 is communicated with the first end of the first ventilating pipe 53, the second end of the first ventilating pipe 53 is communicated with the first end of the blower 54, the second end of the blower 54 is communicated with the first end of the second ventilating pipe 55, the second end of the second ventilating pipe 55 is connected with the left end of the second fairing 56, the right end of the second fairing 56 is abutted against the inner wall of the filtering air pipe 51, the left end of the first fairing 52 is larger than the right end of the first fairing 52, the left end of the second fairing 56 is smaller than the right end of the second fairing 56, a plurality of filtering plates 57 are fixedly arranged on the inner wall of the filtering air pipe 51 on the right side of the second fairing 56, each filtering plate 57 is fixedly arranged with the filtering air pipe 51 through one clamping and fixing pin 58 of a plurality of clamping and fixing pins 58, and a plurality of filter plates 57 are arranged on the inner wall of the filtering air duct 51 in a staggered manner, wherein the filter plates 57 are filter cloth layers loaded with activated carbon powder, and the type of the blower 54 is ZG-65.

Note that, in fig. 1 to 4,

it indicates that the dirty air is discharged,

indicating fresh air intake.

The above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention.

Claims (6)

1. The utility model provides a severe cold district secretly digs subway station ventilation heat preservation system which characterized in that includes: the device comprises an air pipe assembly, a heating pipeline, a temperature sensor, a fixing assembly, a sealing assembly and an axial-flow type ventilator;

the air pipe assembly comprises a main pipeline, a branch pipeline and a connecting pipeline, the main pipeline and the branch pipeline are communicated through the connecting pipeline, the main pipeline, the branch pipelines and the connecting pipelines are sealed by the sealing components, the main pipeline, the branch pipelines and the connecting pipeline are all fixedly installed with the cavern through the fixing component, the axial-flow type ventilator is communicated with the air inlet end of the main pipeline, the heating pipeline is arranged on the main pipeline, the temperature sensor is arranged on the side wall of the cavern and is electrically connected with the heating pipeline, when the temperature in the cavern is lower than a set value, the heating pipeline is automatically started to heat cold air, and hot air heated by the heating pipeline sequentially passes through the main pipeline, the connecting pipeline and the branch pipeline and is conveyed into the cavern.

2. The ventilation and heat preservation system for the underground excavated subway station in the alpine region as claimed in claim 1, wherein the trunk pipeline is composed of a plurality of trunk air pipes, any two adjacent trunk air pipes in the plurality of trunk air pipes are fixedly connected through the sealing assembly, each trunk air pipe in the plurality of trunk air pipes is fixedly installed with the cavern through the fixing assembly, and the heating pipeline is arranged in the plurality of trunk air pipes;

the branch air pipe is composed of a plurality of branch air pipes, any two adjacent branch air pipes in the plurality of branch air pipes are fixedly connected through the sealing assembly, and each branch air pipe in the plurality of branch air pipes is fixedly installed with the cavern through the fixing assembly;

the connecting pipeline is L-shaped, the middle part of the connecting pipeline is in arc transition, and two ends of the connecting pipeline are respectively sealed and fixed with the main air pipe and the branch air pipes through the sealing assemblies.

3. The ventilation and thermal insulation system for the underground excavated subway station in the alpine region according to claim 1, wherein the sealing assembly comprises: the sealing device comprises a first sealing element, a second sealing element, a step bulge, a step groove, a first clamping groove, a second clamping groove, a third sealing element and a corner protector;

the first sealing element is provided with a first clamping groove used for clamping the first end of the sealing assembly, the second sealing element is provided with a second clamping groove used for clamping the second end of the sealing assembly, the right side of the first sealing element is provided with the step protrusion, the left side of the second sealing element is provided with the step groove corresponding to the step protrusion, the step protrusion is arranged in the step groove, the third sealing element is of an Contraband type structure, the third sealing element is clamped on the first sealing element and the second sealing element, and the corner protector is clamped on the corner of the air pipe assembly.

4. The ventilation and thermal insulation system for the underground excavated subway station in the alpine region according to claim 1, wherein the fixing member comprises: the first rivet, the first connecting plate, the connecting round hole, the first fixing plate, the threaded hole, the screw rod, the second fixing plate, the through hole, the second connecting plate, the square groove and the second rivet;

the first connecting plate is riveted at the top of the cavern through the first rivet, the first connecting plate is provided with the connecting round hole, the first fixing plate is L-shaped, the first end of the first fixing plate penetrates through the connecting round hole to be fixedly connected with the first connecting plate, the second end of the first fixing plate is abutted against the lower end of the air pipe component, the second end of the first fixing plate is provided with a threaded hole, the second fixing plate is L-shaped, the second end of the second fixing plate is provided with a through hole, the first end of the screw rod is clamped on the second fixing plate, the second end of the screw rod penetrates through the through hole to extend into the threaded hole, the second connecting plate is riveted on the cavern through the second rivet, the second connecting plate is provided with the square groove, and the first end of the second fixing plate penetrates through the square groove to be movably connected with the second connecting plate, and the second end of the second fixing plate abuts against the lower end of the air pipe assembly, and when the screw is screwed, the horizontal distance between the first fixing plate and the second fixing plate is close to enable the air pipe assembly to be clamped and fixed with the cavern.

5. The ventilation and thermal insulation system for the underground excavated subway station in the alpine region according to claim 1, wherein the heating duct comprises: the device comprises a heating air pipe, a plurality of heaters, a protective layer, a first heat-insulating layer, a second heat-insulating layer and a PLC (programmable logic controller);

the utility model discloses a heat preservation device, including a heat pipe, a heat preservation layer, a plurality of heat pipe, the heating tuber pipe set firmly in on the trunk line, the both ends of heating tuber pipe are passed through sealing assembly with the trunk line is sealed fixed, a plurality of heater equipartition is in the outside of heating tuber pipe is on the surface, the protective layer cladding is in on the plurality of heater, first heat preservation cladding is in on the protective layer, the protective layer first heat preservation layer the reservation.

6. The ventilation and insulation system for the underground excavated subway station in the alpine region according to claim 1, further comprising a filtering pipe, wherein the filtering pipe comprises: the filter air pipe comprises a filter air pipe, a first fairing, a first ventilating pipe, a blower, a second ventilating pipe, a second fairing, a plurality of filter plates and a plurality of clamping pins;

the filtering air pipe is fixedly arranged on the branch pipeline, two ends of the filtering air pipe are sealed and fixed with the branch pipeline through the sealing component, the left end of the first fairing abuts against the inner wall of the filtering air pipe, the right end of the first fairing is communicated with the first end of the first ventilation pipe, the second end of the first ventilation pipe is communicated with the first end of the air blower, the second end of the air blower is communicated with the first end of the second ventilation pipe, the second end of the second ventilation pipe is connected with the left end of the second fairing, the right end of the second fairing abuts against the inner wall of the filtering air pipe, the left end of the first fairing is larger than the right end of the first fairing, the left end of the second fairing is smaller than the right end of the second fairing, and a plurality of filter plates are fixedly arranged on the inner wall of the filtering air pipe on the right side of the second fairing, each filter plate in the plurality of filter plates is fixed with the filtering air pipe through one clamping pin in the plurality of clamping pins, and the plurality of filter plates are arranged on the inner wall of the filtering air pipe in a staggered mode.

Images