CN113339028B

CN113339028B - Ventilation device in long-distance shield tunnel construction

Info

Publication number: CN113339028B
Application number: CN202110797786.4A
Authority: CN
Inventors: 王军华; 陈晓军; 王立家; 王璐; 赵俊垒
Original assignee: China Construction Fourth Engineering Division Corp Ltd
Current assignee: China Construction Fourth Engineering Division Corp Ltd
Priority date: 2021-07-14
Filing date: 2021-07-14
Publication date: 2022-03-29
Anticipated expiration: 2041-07-14
Also published as: CN113339028A

Abstract

The invention discloses a ventilation device in long-distance shield tunnel construction, and belongs to the technical field of tunnel ventilation. The utility model provides a ventilation unit in long distance shield tunnel construction, which comprises a top plate, the relative position rather than the plurality of lugs of the homonymy other end of baffle inside wall is seted up flutedly, baffle outside end outside has set firmly the sideboard, connecting pipe A both sides outer wall symmetry has set firmly two medium plates, set firmly extension spring between sideboard inside wall and the medium plate outer wall, the tuber pipe rear end is equipped with connecting pipe B admittedly, connecting pipe B back wall both sides open end inside symmetry has set firmly two intubate, a plurality of grooves have been seted up for the position of a plurality of lugs to the intubate outer wall, the intubate outer wall has set firmly a plurality of inserted blocks for the position of a plurality of grooves. The invention can be more quickly put into use, avoids the risk of oxygen deficiency in the construction environment in the tunnel, meets the life requirements of constructors, obviously improves the construction environment of the shield tunnel and has strong practicability.

Description

Ventilation device in long-distance shield tunnel construction

Technical Field

The invention relates to the technical field of tunnel ventilation, in particular to a ventilation device in long-distance shield tunnel construction.

Background

The tunnel is an engineering building buried in the stratum, is a form of utilizing underground space by human beings, and can be divided into a traffic tunnel, a hydraulic tunnel, a municipal tunnel, a mine tunnel and the like, wherein the traffic tunnel is a channel specially used for automobile transportation, and has important functions in various aspects such as improving the technical state of a road, shortening the running distance, improving the transportation capacity, reducing accidents and the like.

Through the retrieval, the patent with publication number CN211874535U discloses a ventilation unit in long distance shield tunnel construction, through having set up ventilation mechanism for the air-blower can upwards get rid of the effect that promotes the taking a breath with the air slant forty-five degree of running through type ventilation groove inner chamber, is linked together through running through type ventilation groove and first bottom ventilation groove and a plurality of arch braced frame and first bottom ventilation groove mutually support, can let form reciprocal ventilation orbit from top to bottom in the tunnel, thereby reduces the ventilation dead angle in the tunnel.

The bottom surface and two side supporting structures of the existing device are both set to be rectangular structures, however, the tunnel just opened in shield construction is a cylindrical structure, so that the device needs to be provided with a pot hole or a bedding foundation on the ground if the device is fixed in the tunnel, which greatly slows down the installation speed of the device, and further causes the problem of insufficient ventilation of a newly opened tunnel area, and the problem of oxygen deficiency of constructors is caused, furthermore, the device achieves the effect of enhancing air flow by pumping the air at the bottom of the tunnel to the top layer of the tunnel, so that the air flowing back and forth is still turbid air in the tunnel, the constructors can carry out production work for a long time without injecting fresh air, and extreme danger is caused, so that the life safety of the constructors cannot be guaranteed, in other existing ventilation devices in shield construction, for example, CN2019217859970 adopts a press-in primary ventilation system and a jet flow type secondary ventilation system, and the tunnel ventilation system is extended into the shield body from the formed tunnel, the ventilation device comprises a ventilation device body, a jet flow secondary ventilation system and a shield, wherein the ventilation device body is provided with a plurality of jet flow fans, the jet flow secondary ventilation system is composed of a plurality of jet flow fans, the jet flow fans are dispersedly arranged in an area where gas is easy to collect in a shield body, but a large number of jet flow fans need to be arranged, and the jet flow fans need to occupy large space.

Disclosure of Invention

1. Technical problem to be solved

The invention aims to provide a ventilation device in long-distance shield tunnel construction, which aims to solve the problems in the background technology.

2. Technical scheme

A ventilation device in long-distance shield tunnel construction comprises a top plate, wherein a box body is fixedly arranged in the middle of the bottom surface of the top plate, an air pipe is arranged at the upper part of the box body in a penetrating manner, a partition plate is fixedly arranged in the middle of the bottom surface of the inner side of the air pipe, two air cavities are symmetrically arranged on two sides of the box body, an axle center is arranged at the lower part of the outer side end of each air cavity, a turbine fan is coaxially and fixedly connected with the outer side end of the axle center, a circular groove is arranged at the position, relative to the turbine fan, of the outer side wall of each air cavity, a bearing seat is sleeved in the middle of the axle center, a transmission gear A is coaxially and fixedly connected with the inner side end of the axle center, a transmission gear B is arranged above the transmission gear A, a rotating shaft is coaxially and fixedly connected with the inner side end of the transmission gear B, a motor cavity is arranged at the position, relative to the position between the two air cavities, the inner side end of the rotating shaft penetrates through the inner side wall of the air cavities and extends to the interior of the motor cavity and is coaxially and fixedly connected with a bevel gear A, the motor cavity rear wall is fixedly provided with a motor relative to the position between the two bevel gears A, the output end of the motor is coaxially and fixedly connected with a bevel gear B, the four corners of the inner wall at the two sides of the top plate are in a symmetrical structure and are provided with a plurality of through holes, fixing bolts are inserted in the through holes, the middle parts of the inner side ends of the fixing bolts are provided with inner cavities, the inner side ends of the inner cavities are provided with extrusion plates, the inner walls of the inner cavities are in annular equal intervals and are provided with a plurality of through grooves, the outer side ends of the through grooves are hinged with inserting plates, the inner side ends of the extrusion plates are fixedly connected with threaded rods through connecting rods coaxially, inner threads are arranged at the positions of the inner walls of the inner cavities relative to the threaded rods, the outer side ends of the threaded rods are fixedly provided with handles, the front end of the air pipe is fixedly provided with a connecting pipe A, four baffles are symmetrically inserted at the upper side and the lower side of the connecting pipe A, and the inner side walls of the baffles are linearly and are fixedly provided with a plurality of convex blocks at equal intervals, the novel air duct is characterized in that a groove is formed in the position, opposite to the other end of the same side, of the inner side wall of the baffle, an edge plate is fixedly arranged on the outer side of the outer end of the baffle, two middle plates are symmetrically and fixedly arranged on the outer walls of two sides of the connecting pipe A, a tension spring is fixedly arranged between the inner side wall of the edge plate and the outer wall of the middle plate, a connecting pipe B is fixedly arranged at the rear end of the air duct, two inserting pipes are symmetrically and fixedly arranged inside the opening ends of two sides of the rear wall of the connecting pipe B, a plurality of block grooves are formed in the positions, opposite to the plurality of lugs, of the outer wall of each inserting pipe, and a plurality of inserting blocks are fixedly arranged in the positions, opposite to the plurality of grooves, of the outer wall of each inserting pipe.

Preferably, the top plate is of an arc-shaped structure, the box body is of a U-shaped structure with a downward concave surface, the air pipe is of a hollow arc-shaped structure, the air cavity is of an L-shaped structure, and the inner side end of the air cavity is communicated with the inside of the air pipe.

Preferably, the lower ends of the outer walls of the two sides of the box body are in clearance fit with the lower ends of the inner walls of the two sides of the top plate respectively, the transmission gear A is in meshed connection with the transmission gear B, the lower end of the bearing seat is fixedly connected with the bottom surface of the air cavity, the rotating shaft is rotatably connected with the box body, and the bevel gear A is in meshed connection with the bevel gear B.

Preferably, the dead bolt outside end is the circular cone structure, the dead bolt is the cooperation of pegging graft with the through hole, stripper plate and inner chamber sliding fit, the picture peg is the right triangle structure of inclined plane towards inboard side, picture peg outer wall and run through inslot wall sliding contact, threaded rod and internal thread threaded connection.

Preferably, connecting pipe A is curved horizontal day style of calligraphy structure, the baffle is the arc structure, baffle antetheca medial extremity is the fillet structure, is located two of homonymy the baffle medial extremity runs through connecting pipe A upper and lower outer wall respectively and extends to inside and closely laminate, baffle and connecting pipe A sliding connection are located a plurality of homonymy the lug is the staggered arrangement structure setting, the lug is pegged graft with the recess and is cooperated.

Preferably, connecting pipe B is curved horizontal U-shaped structure, the cooperation of pegging graft of intubate rear end and connecting pipe A front side open end, intubate back wall and baffle antetheca extrusion fit, the lug is pegged graft with the piece groove and is cooperated, the inserted block is pegged graft with the recess and is cooperated.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

1. the tunnel roof fixing device is provided with the roof and the fixing bolts, the fixing bolts can be enabled to be in a shape of large inside and small outside when the inserting plates are inserted into the soil layer, the fixing strength of the tunnel roof fixing device and the tunnel roof can be effectively enhanced, the fixing operation of workers on the tunnel roof fixing device is greatly facilitated, the tunnel roof fixing device can be put into use more quickly, and the risk of oxygen deficiency in the construction environment in the tunnel is avoided.

2. The invention is provided with two symmetrical turbofan, the staff can use the electromotor to drive the bevel gear B to rotate after the device is installed, then the two bevel gears A on the two sides can drive the rotating shaft and the transmission gear B to rotate along with the rotation of the bevel gear B, the transmission gear B further drives the transmission gear A to rotate and enables the turbofan to rotate through the axis, so the two turbofan on the two sides can respectively generate two effects of air suction into the air cavity and air exhaust outwards through the air cavity, the inner side end of the air cavity is communicated with the inside of the air pipe, the inside of the air pipe is divided into two parts by the partition plate, so the turbid air in the tunnel can be exhausted through the air pipe and the fresh air outside the tunnel can be injected into the tunnel from the other side, and under the design that the box body is in clearance fit with the inner wall of the top plate, the device can cover the lower part of the tunnel at the installation position of the device by using the radian of the inner wall of the top plate, this device of reinforcing that so can be very big is to the inside ventilation effect in tunnel, also makes the inside energy of tunnel continuous supply with fresh air when the effectual inside air mobility that has improved the tunnel, has both satisfied constructor's life demand, also makes the shield tunnel construction environment obtain apparent improvement, and the practicality is strong.

3. The invention is provided with a connecting pipe A and a connecting pipe B, the connecting pipe B is fixed towards the tunnel starting end when being installed, thus the connecting pipe B closest to the tunnel starting end can suck external air and discharge turbid air in the tunnel, and in the long-distance tunnel shield construction process, workers can also use the inserting pipe fixedly arranged in the connecting pipe B to be inserted into the connecting pipe A by the inserting pipe in the continuous installation process of a plurality of devices, under the extrusion effect of the rear ends of the two inserting pipes on the front walls of the four baffles, the four baffles can move outwards along the directions respectively connected with the connecting pipe A in a sliding way, then the mutual connection between the two devices is completed after the inserting pipe is completely inserted, the plurality of devices are mutually matched to fully supply the external air into the deep part of the tunnel, and when the two devices are mutually connected, the lug and the recess of a plurality of baffle inside walls can respectively with the piece groove and the inserted block grafting cooperation of intubate outer wall, this structure can make to constitute labyrinth seal structure between intubate and the dog crack, avoid having the problem that the leakage point leads to the ventilation effect to reduce between two this devices to take place, and on the same hand, be located and also can form between the inside dog of this device connecting pipe A of last installation and seal under the cooperation of lug and recess, ensured this device in the at utmost and changed to the inside air in tunnel, constructor's life safety in the long distance tunnel shield construction has been ensured.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is a cross-sectional structural view of the fixing bolt of the present invention;

FIG. 4 is a bottom view of the top plate and the box of the present invention;

FIG. 5 is an exploded view of the connecting tube A of the present invention;

fig. 6 is an exploded view of the connecting tube B of the present invention.

The reference numbers in the figures illustrate: 1. a top plate; 2. a box body; 3. an air duct; 4. a partition plate; 5. a wind cavity; 6. an axis; 7. a turbo fan; 8. a circular groove; 9. a bearing seat; 10. a transmission gear A; 11. a transmission gear B; 12. a rotating shaft; 13. a motor cavity; 14. a bevel gear A; 15. an electric motor; 16. a bevel gear B; 17. a through hole; 18. a fixing bolt; 19. an inner cavity; 20. a pressing plate; 21. a through groove; 22. inserting plates; 23. a connecting rod; 24. a threaded rod; 25. an internal thread; 26. a grip; 27. a connecting pipe A; 28. a baffle plate; 29. a bump; 30. a groove; 31. a side plate; 32. a middle plate; 33. an extension spring; 34. a connecting pipe B; 35. inserting a tube; 36. a block groove; 37. and (5) inserting the blocks.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-6, the present invention provides a technical solution:

a ventilation device in long-distance shield tunnel construction comprises a top plate 1, a box body 2 is fixedly arranged in the middle of the bottom surface of the top plate 1, an air pipe 3 is arranged at the upper part of the box body 2 in a penetrating manner, a partition plate 4 is fixedly arranged in the middle of the bottom surface of the inner side of the air pipe 3, two air cavities 5 are symmetrically arranged on two sides of the box body 2, an axle center 6 is arranged at the lower part of the outer side end of each air cavity 5, a turbine fan 7 is coaxially and fixedly connected with the outer side end of each axle center 6, a circular groove 8 is arranged at the position, opposite to the turbine fan 7, of the outer side wall of each air cavity 5, a bearing seat 9 is sleeved in the middle of each axle center 6, a transmission gear A10 is coaxially and fixedly connected with the inner side end of each axle center 6, a transmission gear B11 is arranged above each transmission gear A10, a rotating shaft 12 is coaxially and fixedly connected with the inner side end of each transmission gear B11, a motor cavity 13 is arranged in the box body 2 and extends to the inner side wall of each air cavity 13 and is coaxially and fixedly connected with a bevel gear A14, a motor 15 is fixedly arranged on the rear wall of the motor cavity 13 corresponding to the position between two bevel gears A14, a bevel gear B16 is coaxially and fixedly connected with the output end of the motor 15, a plurality of through holes 17 are symmetrically arranged at four corners of the inner walls of two sides of the top plate 1, a fixing bolt 18 is inserted in the through holes 17, an inner cavity 19 is arranged in the middle of the inner side end of the fixing bolt 18, a squeezing plate 20 is arranged at the inner side end of the inner cavity 19, a plurality of through grooves 21 are annularly and equidistantly arranged on the inner wall of the inner cavity 19, inserting plates 22 are hinged to the outer side end of the through grooves 21, a threaded rod 24 is coaxially and fixedly connected to the inner side end of the squeezing plate 20 through a connecting rod 23, an internal thread 25 is arranged on the inner wall of the inner cavity 19 corresponding to the threaded rod 24, a handle 26 is fixedly arranged on the outer side end of the threaded rod 24, a connecting pipe A27 is fixedly arranged at the front end of the air duct 3, four baffle plates 28 are symmetrically inserted on the upper side and the lower side of the connecting pipe A27, a plurality of lugs 29 are linearly and equidistantly arranged, the relative position rather than a plurality of lugs 29 of the homonymy other end of baffle 28 inside wall has seted up recess 30, the outside end outside of baffle 28 outside has set firmly sideboard 31, connecting pipe A27 both sides outer wall symmetry has set firmly two medium plates 32, set firmly extension spring 33 between sideboard 31 inside wall and the medium plate 32 outer wall, the tuber pipe 3 rear end has set firmly connecting pipe B34, connecting pipe B34 back wall both sides open end inside symmetry has set firmly two intubate 35, a plurality of piece grooves 36 have been seted up for a plurality of lugs 29's position to intubate 35 outer wall, a plurality of inserted blocks 37 have been set firmly for a plurality of recess 30's position to intubate 35 outer wall.

Specifically, roof 1 is the arc structure, and box body 2 is the decurrent U type structure of concave surface, and tuber pipe 3 is hollow arc structure, and wind chamber 5 is L type structure, and 5 medial extremes in wind chamber are linked together with 3 insides in tuber pipe.

Furthermore, the lower ends of the outer walls at two sides of the box body 2 are respectively in clearance fit with the lower ends of the inner walls at two sides of the top plate 1, the transmission gear A10 is in meshed connection with the transmission gear B11, the lower end of the bearing seat 9 is fixedly connected with the bottom surface of the air cavity 5, the rotating shaft 12 is rotationally connected with the box body 2, the bevel gear A14 is in meshed connection with the bevel gear B16, a worker can drive the bevel gear B16 to rotate by using the motor 15 after the device is installed, so that the two bevel gears A14 at two sides can drive the rotating shaft 12 and the transmission gear B11 to rotate along with the rotation of the bevel gear B16, the transmission gear B11 further drives the transmission gear A10 to rotate and enables the turbofan 7 to rotate through the axle center 6, so that the two turbofan 7 at two sides respectively generate two effects of sucking air into the air cavity 5 and exhausting air out through the air cavity 5, because the inner side end of the air cavity 5 is communicated with the interior of the air pipe 3, and the interior of the air pipe 3 is separated into two parts by the partition plate 4, just so can discharge the muddy air in the tunnel and pour into the tunnel by the opposite side with the outside fresh air in the tunnel through tuber pipe 3, and under box body 2 and the design of 1 inner wall clearance fit of roof, utilize the radian of 1 inner wall of roof to make this device no matter breathe in or exhaust the tunnel lower part that all can cover this device mounted position, reinforcing this device that so can be very big to the inside ventilation effect in tunnel, also make the inside energy of tunnel supply that has fresh air constantly when the effectual inside air mobility that has improved the tunnel.

Furthermore, the outer end of the fixing bolt 18 is of a conical structure, the fixing bolt 18 is in inserting fit with the through hole 17, the extrusion plate 20 is in sliding fit with the inner cavity 19, the insertion plate 22 is of a right-angled triangle structure with an inclined surface facing to the inner side, the outer wall of the insertion plate 22 is in sliding contact with the inner wall of the through groove 21, the threaded rod 24 is in threaded connection with the internal thread 25, a worker can install the device along the top surface of the tunnel along with tunneling in the process of utilizing the shield tunneling machine to open the long-distance tunnel, the connecting pipe B34 faces to the starting end of the tunnel, the worker needs to attach the arc-shaped top surface of the top plate 1 to the top surface of the tunnel firstly in the installation process, then the fixing bolts 18 are inserted into the through holes 17, the fixing bolts 18 can be easily inserted into soil layers of the inner wall of the tunnel under the action of the conical structure at the outer end of the fixing bolt 18 and the inner wall of the tunnel, and then the device can be initially fixed through the inserting of the fixing bolts 18 and the inner wall, the fixing bolts 18 can be primarily fixed, the handle 26 can be screwed to drive the threaded rod 24 to move along the inner end of the inner wall of the inner side of the inner wall of the fixing bolt 18 The screw thread 25 moves, and the threaded rod 24 can pull the extrusion plate 20 through the connecting rod 23 and move inwards along the inner cavity 19 and extrude the plurality of inserting plates 22 to enable the plurality of inserting plates 22 to diffuse around the fixing bolt 18 along the hinged position, and the inserting plates 22 are inserted into the soil layer to enable the part, located inside the soil layer, of the fixing bolt 18 to be in a shape with a large inside and a small outside, so that the fixing strength of the device and the top wall of the tunnel can be effectively enhanced.

Still further, connecting pipe A27 is curved horizontal day style of calligraphy structure, baffle 28 is the arc structure, baffle 28 antetheca medial extremity is the fillet structure, two baffle 28 medial extremities that are located the homonymy run through connecting pipe A27 respectively about the outer wall extend to inside and closely laminate, baffle 28 and connecting pipe A27 sliding connection, a plurality of lugs 29 that are located the homonymy are the staggered arrangement structure setting, lug 29 and recess 30 are pegged graft the cooperation, also can form sealedly under the cooperation of lug 29 and recess 30 between the dog that is located this device connecting pipe A27 of final installation, guaranteed to the utmost that this device changes the inside air of tunnel, ensured constructor's life safety in the long distance tunnel shield construction.

It is worth introducing that the connecting tube B34 is an arc-shaped horizontal y-shaped structure, the rear end of the insertion tube 35 is in inserting fit with the front opening end of the connecting tube a27, the rear wall of the insertion tube 35 is in extrusion fit with the front wall of the baffle 28, the projection 29 is in inserting fit with the block groove 36, and the insertion block 37 is in inserting fit with the groove 30, so that a worker can utilize the insertion tube 35 fixedly arranged in the connecting tube B34 to be inserted into the connecting tube a27 in the process of continuously installing a plurality of devices, under the extrusion effect of the rear ends of the two insertion tubes 35 on the front walls of the four baffles 28, the four baffles 28 can move outwards along the directions of sliding connection with the connecting tube a27 respectively, and then the interconnection between the two devices is completed after the insertion tube 35 is completely inserted, so that the plurality of devices can be matched with each other to supply the external air into the deep part of the tunnel, and when the two devices are connected with each other, the projection 29 and the groove 30 on the inner side walls of the plurality of the baffles 28 can be inserted into the block groove 36 and the insertion block groove 37 on the outer wall of the insertion tube 35 and the insertion block groove 37 respectively Connect the cooperation, this structure can make to constitute labyrinth seal structure between intubate 35 and the dog crack, avoids having the problem emergence that the leakage point leads to the ventilation effect to reduce between two this devices.

During the process of utilizing the shield tunneling machine to open the long-distance tunnel, a worker can install the device along the top surface of the tunnel and enable the connecting pipe B34 to face the initial end of the tunnel along with the tunneling of the tunnel, the worker needs to attach the arc-shaped top surface of the top plate 1 to the top surface of the tunnel firstly in the installation process, then the fixing bolts 18 are inserted into the through holes 17 along the through holes, the fixing bolts 18 can be easily inserted into the soil layer of the inner wall of the tunnel under the action of the conical structure at the outer end of the fixing bolts 18, after the device is preliminarily fixed through the insertion connection of the fixing bolts 18 and the inner wall of the tunnel, the handle 26 can be screwed along the inner end of the fixing bolts 18 to drive the threaded rod 24 to move along the internal thread 25, the threaded rod 24 can pull the extrusion plate 20 to move inwards along the inner cavity 19 through the connecting rod 23 and extrude the inserting plates 22 to enable the inserting plates 22 to diffuse around the fixing bolts 18 along the hinged positions, and the inserting plates 22 into the soil layer can enable the part of the fixing bolts 18 located inside the soil layer to be in a shape with large inside and small inside the large inside The fixing strength of the device and the top wall of the tunnel can be effectively enhanced, the fixing operation of workers on the device is greatly facilitated, the device can be put into use more quickly, the risk of oxygen deficiency caused by construction environment in the tunnel is avoided, the workers can drive the bevel gear B16 to rotate by using the motor 15 after the device is installed, then the two bevel gears A14 on two sides can drive the rotating shaft 12 and the transmission gear B11 to rotate along with the rotation of the bevel gear B16, the transmission gear B11 further drives the transmission gear A10 to rotate and enables the turbofan 7 to rotate through the shaft center 6, so that the two turbofan 7 on two sides respectively generate two effects of air suction into the air cavity 5 and air exhaust out through the air cavity 5, the inner side end of the air cavity 5 is communicated with the inside of the air pipe 3, the inside of the air pipe 3 is separated into two parts by the partition plate 4, so that the turbid air in the tunnel can be discharged through the air pipe 3, and the fresh air outside the tunnel can be injected into the tunnel from the other side, under the design that the box body 2 is in clearance fit with the inner wall of the top plate 1, the radian of the inner wall of the top plate 1 is utilized to enable the device to cover the lower part of the tunnel at the installation position of the device no matter whether air suction or exhaust is performed, so that the ventilation effect of the device on the interior of the tunnel can be greatly enhanced, the air fluidity in the tunnel is effectively improved, meanwhile, the energy in the tunnel is enabled to continuously supply the fresh air, the life requirement of constructors is met, the construction environment of the shield tunnel is remarkably improved, the practicability is high, in the long-distance tunnel shield construction process, the constructors can also use the insertion pipe 35 fixedly arranged in the connecting pipe B34 to be inserted into the connecting pipe A27 in the continuous installation process, under the extrusion effect of the rear ends of the two insertion pipes 35 on the front walls of the four baffles 28, the four baffles 28 can move outwards along the directions of sliding connection with the connecting pipe A27 respectively, then after the insertion pipes 35 are completely inserted, the mutual connection between the two devices is completed, so that the multiple devices can be mutually matched to supply external air into the deep part of the tunnel, and when the two devices are mutually connected, the convex blocks 29 and the concave grooves 30 on the inner side walls of the multiple baffles 28 can be respectively in inserted connection and matching with the block grooves 36 and the insert blocks 37 on the outer wall of the insertion pipes 35, the structure can enable the insertion pipes 35 and the block seams to form a labyrinth seal structure, the problem that the ventilation effect is reduced due to the existence of leakage points between the two devices is avoided, and similarly, the seal can be formed between the blocks positioned inside the connecting pipe A27 of the finally installed device under the matching of the convex blocks 29 and the concave grooves 30, the air inside the tunnel is replaced by the device to the maximum extent, and the life safety of constructors in long-distance tunnel shield construction is guaranteed.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a ventilation unit in long distance shield tunnel construction, includes roof (1), its characterized in that: the wind power generator is characterized in that a box body (2) is fixedly arranged in the middle of the bottom surface of the top plate (1), an air pipe (3) is arranged on the upper portion of the box body (2) in a penetrating mode, the top plate (1) is of an arc-shaped structure, the box body (2) is of a U-shaped structure with a downward concave surface, the air pipe (3) is of a hollow arc-shaped structure, a partition plate (4) is fixedly arranged in the middle of the inner bottom surface of the air pipe (3), two air cavities (5) are symmetrically arranged on two sides of the box body (2), an axle center (6) is arranged on the lower portion of the outer side end of each air cavity (5), a turbofan (7) is coaxially and fixedly connected with the outer side end of each axle center (6), a circular groove (8) is formed in the outer side wall of each air cavity (5) relative to the position of the turbofan (7), a bearing seat (9) is sleeved in the middle of each axle center (6), a transmission gear A (10) is coaxially and fixedly connected with a transmission gear A (10), and a transmission gear B (11) is arranged above the transmission gear A, the inner side end of the transmission gear B (11) is coaxially and fixedly connected with a rotating shaft (12), a motor cavity (13) begins to be arranged in the box body (2) relative to a position between the two air cavities (5), the inner side end of the rotating shaft (12) penetrates through the inner side wall of the air cavity (5) and extends into the motor cavity (13) and is coaxially and fixedly connected with a bevel gear A (14), a motor (15) is fixedly arranged on the rear wall of the motor cavity (13) relative to a position between the two bevel gear A (14), the output end of the motor (15) is coaxially and fixedly connected with a bevel gear B (16), a plurality of through holes (17) are symmetrically formed in four corners of the inner walls on the two sides of the top plate (1), fixing bolts (18) are inserted into the through holes (17), the outer side ends of the fixing bolts (18) are of a conical structure, and the fixing bolts (18) are in inserted connection with the through holes (17), an inner cavity (19) is formed in the middle of the inner side end of the fixing bolt (18), an extrusion plate (20) is arranged at the inner side end of the inner cavity (19), a plurality of through grooves (21) are formed in the inner wall of the inner cavity (19) in an annular shape at equal intervals, an insertion plate (22) is hinged to the outer side end of each through groove (21), the insertion plate (22) is of a right-angled triangle structure with an inclined surface facing the inner side direction, and the outer wall of the insertion plate (22) is in sliding contact with the inner wall of each through groove (21);

the utility model discloses a fan, including stripper plate (20), inner chamber (19), threaded rod (24), handle (26), tuber pipe (3), connecting pipe A (27) are firmly equipped with to the position of inner chamber (19) inner wall for threaded rod (24), threaded rod (24) outside end has set firmly handle (26), both sides symmetry is inserted and is equipped with four baffle (28) about connecting pipe A (27), baffle (28) inside wall is linear equidistant a plurality of lug (29) have set firmly, baffle (28) inside wall is relative rather than a plurality of the homonymy other end the position of lug (29) is seted up flutedly (30), connecting pipe A (27) are curved horizontal day style of calligraphy structure, baffle (28) are the arc structure, baffle (28) antetheca medial extremity is the fillet structure, is located two of homonymy baffle (28) medial extremity run through connecting pipe A (27) respectively about the outer wall extend to its inside and outside and be located and the fillet structure The baffle plate (28) is in sliding connection with the connecting pipe A (27), the multiple convex blocks (29) positioned on the same side are arranged in a staggered arrangement structure, the convex blocks (29) are in plug fit with the grooves (30), the outer side of the outer side end of the baffle plate (28) is fixedly provided with an edge plate (31), the outer walls of the two sides of the connecting pipe A (27) are symmetrically and fixedly provided with two middle plates (32), and a tension spring (33) is fixedly arranged between the inner side wall of the edge plate (31) and the outer wall of each middle plate (32);

connecting pipe B (34) are firmly equipped with to tuber pipe (3) rear end, the inside symmetry of connecting pipe B (34) rear wall both sides open end has set firmly two intubate (35), connecting pipe B (34) are curved horizontal day style of calligraphy structure, intubate (35) rear end and connecting pipe A (27) front end open end grafting cooperation, intubate (35) outer wall is for a plurality of block groove (36) have been seted up to the position of lug (29), intubate (35) outer wall is for a plurality of the position of recess (30) has set firmly a plurality of inserted blocks (37).

2. The ventilation apparatus in the construction of the long-distance shield tunnel according to claim 1, wherein: the air cavity (5) is of an L-shaped structure, and the inner side end of the air cavity (5) is communicated with the inside of the air pipe (3).

3. The ventilation apparatus in the construction of the long-distance shield tunnel according to claim 1, wherein: the lower ends of the outer walls of the two sides of the box body (2) are in clearance fit with the lower ends of the inner walls of the two sides of the top plate (1) respectively, the transmission gear A (10) is in meshed connection with the transmission gear B (11), the lower end of the bearing seat (9) is fixedly connected with the bottom surface of the air cavity (5), the rotating shaft (12) is rotatably connected with the box body (2), and the bevel gear A (14) is in meshed connection with the bevel gear B (16).

4. The ventilation apparatus in the construction of the long-distance shield tunnel according to claim 1, wherein: the extrusion plate (20) is in sliding fit with the inner cavity (19), and the threaded rod (24) is in threaded connection with the internal thread (25).

5. The ventilation apparatus in the construction of the long-distance shield tunnel according to claim 1, wherein: the rear wall of the insertion pipe (35) is in extrusion fit with the front wall of the baffle plate (28), the protruding block (29) is in plug-in fit with the block groove (36), and the insertion block (37) is in plug-in fit with the groove (30).