Ventilation structure for tunnel construction

Abstract

The utility model relates to the technical field of tunnel construction ventilation, and discloses a ventilation structure for tunnel construction, which comprises a ventilation pipe and a filter plate fixedly mounted on the side wall of an inner cavity of the ventilation pipe, extension frames are fixedly mounted on the left side wall and the right side wall of the ventilation pipe, and limiting grooves are formed in the peripheries of the side walls of the extension frames. Limiting plates are slidably mounted in inner cavities of the limiting grooves, supporting plates are fixedly mounted on the front side and the rear side of the upper end face of the ventilation pipe, transmission mechanisms are arranged in inner cavities of the supporting plates, a cleaning mechanism is arranged in an inner cavity of the ventilation pipe, a support is fixedly mounted on the rear side of the inner cavity of the ventilation pipe, and a circulating fan is fixedly mounted in an inner cavity of the support. Fresh air can be conveyed into the tunnel through the cooperation of the circulating fan, the filter plate and the like, dust on the side wall of the filter plate can be cleaned through the cooperation of the transmission mechanism, the cleaning mechanism and the like, the filter plate is prevented from being blocked by the dust, and the good ventilation efficiency of the ventilation pipe is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of ventilation technology for tunnel construction, specifically a ventilation structure for tunnel construction. Background Technology

[0002] my country ranks first in the world in terms of the volume of completed, under-construction, and planned tunnel projects. Among them, the tunnel construction ventilation system is an important component of tunnel engineering, with the following characteristics: the construction face is constantly advancing, requiring dynamic changes in air volume; the mobility of tunnel projects brings inconvenience to the installation, commissioning, and maintenance of ventilation systems; long-distance ventilation can reduce the scale of multi-head excavation and lower the cost of tunnel construction; there is currently no automatic detection technology for air pressure and wind speed at the outlet of flexible air ducts; the ventilation distance is long, making air duct maintenance difficult; ventilation consumes a lot of electricity; and currently, most air volume adjustment is done manually.

[0003] Because various internal combustion engines are used during tunnel construction, the air inside the tunnel is relatively turbid and has poor air circulation. Polluted gases can linger in the tunnel for a long time, posing a threat to the health of construction workers. Therefore, ventilation devices are needed to provide a good working environment for tunnel construction. However, when using tunnel air intake devices, the large amount of dust in the construction tunnel causes dust to accumulate inside or on the surface of the air intake device, thus affecting the ventilation efficiency. Therefore, there is an urgent need for a ventilation structure for tunnel construction to solve this problem. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The purpose of this invention is to provide a ventilation structure for tunnel construction to solve the problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a ventilation structure for tunnel construction, comprising a ventilation pipe and a filter plate fixedly installed on the inner wall of the ventilation pipe. Extension frames are fixedly installed on the left and right side walls of the ventilation pipe. Limiting grooves are formed around the side walls of the extension frames. Limiting plates are slidably installed within the inner cavities of the limiting grooves. Support plates are fixedly installed on the front and rear sides of the upper end face of the ventilation pipe. A transmission mechanism is provided within the inner cavity of the support plates. A cleaning mechanism is provided within the inner cavity of the ventilation pipe. A dust collection frame is fixedly installed on the lower end face of the ventilation pipe. A collection hopper is detachably installed on the side wall of the dust collection frame. A bracket is fixedly installed on the rear side of the inner cavity of the ventilation pipe. A circulating fan is fixedly installed within the inner cavity of the bracket.

[0008] Preferably, the transmission mechanism includes a transmission worm gear rotatably mounted between the front and rear support plates, a servo motor fixedly mounted on the rear part of the upper end face of the ventilation pipe via a frame, the output shaft end of the servo motor passing through the support plate and fixedly connected to the transmission worm gear, and upright plates fixedly mounted on the left and right sides of the upper end face of the ventilation pipe, with a transmission rod rotatably mounted between the upright plates on the left and right sides.

[0009] Preferably, a transmission worm gear is fixedly installed in the middle of the side wall of the transmission rod, the transmission worm gear is meshed with the transmission worm, and a first bevel gear is fixedly installed at both ends of the transmission rod, and a second bevel gear is meshed below the first bevel gear.

[0010] Preferably, the cleaning mechanism includes sliding grooves on the left and right sides of the inner cavity of the ventilation duct, a connecting rod is slidably installed in the inner cavity of the sliding groove, a threaded rod is rotatably installed on the bottom surface of the inner cavity of the limiting groove, the limiting plate is threadedly connected to the threaded rod, the connecting rod is rotatably connected to the limiting plate, an adjusting gear is fixedly installed on the side wall of the connecting rod, and the second bevel gear is fixedly installed on the upper end face of the threaded rod.

[0011] Preferably, the spiral directions of the threaded rods on the left and right sides are opposite, and racks are fixedly installed on the left and right side walls of the inner cavity of the ventilation pipe. The racks are meshed with adjusting gears, and cleaning rollers are fixedly installed between the adjusting gears on the left and right sides. The cleaning rollers are located in front of the filter plate.

[0012] Preferably, the lower end face of the ventilation pipe is provided with a groove that communicates with the ash collection frame, the inner cavity side wall of the collection hopper is provided with a storage groove, the inner cavity bottom surface of the storage groove is slidably installed with a locking block, the inner cavity bottom surface of the storage groove is fixedly installed with a return spring, and the side wall of the ash collection frame is provided with a locking groove.

[0013] Preferably, the ash collection frame is slidably connected to the collection hopper, the other end of the reset spring is fixedly installed on the side wall of the locking block, the locking block is slidably connected to the locking groove, the trough is located in front of the filter plate, and the outer end of the locking block is set as an arc surface.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. In this utility model, the user can start the servo motor to make the transmission worm gear drive the transmission worm wheel to rotate. The transmission worm wheel can drive the transmission rod to rotate. The first bevel gear and the second bevel gear mesh with each other. At this time, the transmission rod can drive the first bevel gear to rotate the second bevel gear. The second bevel gear can drive the threaded rod to rotate. Under the constraint of the limiting groove on the limiting plate, the limiting plate can move up and down on the side wall of the threaded rod. Through the setting of the rack, when the limiting plate drives the connecting rod to move up and down, the adjusting gear will also rotate continuously, so that the cleaning roller rolls on the side wall of the filter plate to clean the dust in the holes of the filter plate side wall, thus ensuring that the entire ventilation pipe has good ventilation efficiency.

[0016] 2. In this utility model, dust scraped off from the side wall of the filter plate can fall into the inner cavity of the collection hopper through the trough. Then, the user can pull down the collection hopper. Because the outer end of the locking block is set with an arc surface, the locking block will disengage from the locking groove inner cavity on the dust collection frame, so that the return spring is compressed. At this time, the collection hopper and the dust collection frame will be in a sliding state, which facilitates the user's disassembly and installation of the collection hopper and greatly improves the efficiency of the user's maintenance of the ventilation pipe. Attached Figure Description

[0017] Figure 1 This is a front view schematic diagram of the overall structure of a ventilation structure for tunnel construction according to this utility model;

[0018] Figure 2 This is a rear view schematic diagram of the overall structure of a ventilation structure for tunnel construction according to this utility model;

[0019] Figure 3 This is a top-view partial sectional view of a ventilation structure for tunnel construction according to the present invention.

[0020] Figure 4 This is a cross-sectional view of the collection hopper of a ventilation structure for tunnel construction according to this utility model.

[0021] In the diagram: 1. Ventilation duct; 11. Filter plate; 12. Sliding groove; 13. Leakage groove; 2. Extension frame; 21. Limiting groove; 3. Limiting plate; 4. Support plate; 5. Transmission mechanism; 51. Transmission worm gear; 52. Servo motor; 53. Vertical plate; 54. Transmission rod; 55. Transmission worm wheel; 56. First bevel gear; 57. Second bevel gear; 6. Cleaning mechanism; 61. Connecting rod; 62. Threaded rod; 63. Adjusting gear; 64. Rack; 65. Cleaning roller; 7. Dust collection frame; 71. Engaging groove; 8. Collection hopper; 81. Storage trough; 82. Engaging block; 83. Return spring; 9. Bracket; 91. Circulating fan. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-4 This utility model provides a technical solution for a ventilation structure for tunnel construction: a ventilation structure for tunnel construction includes a ventilation pipe 1 and a filter plate 11 fixedly installed on the inner wall of the ventilation pipe 1. An extension frame 2 is fixedly installed on the left and right side walls of the ventilation pipe 1. A limiting groove 21 is opened around the side wall of the extension frame 2. A limiting plate 3 is slidably installed in the inner cavity of the limiting groove 21. A support plate 4 is fixedly installed on the front and rear sides of the upper end face of the ventilation pipe 1. A transmission mechanism 5 is provided in the inner cavity of the support plate 4. A cleaning mechanism 6 is provided in the inner cavity of the ventilation pipe 1. A dust collection frame 7 is fixedly installed on the lower end face of the ventilation pipe 1. A collection hopper 8 is detachably installed on the side wall of the dust collection frame 7. A bracket 9 is fixedly installed on the rear side of the inner cavity of the ventilation pipe 1. A circulating fan 91 is fixedly installed in the inner cavity of the bracket 9.

[0024] Furthermore, the transmission mechanism 5 includes a transmission worm gear 51 rotatably installed between the front and rear support plates 4, a servo motor 52 is fixedly installed on the rear part of the upper end face of the ventilation pipe 1 through the frame, the output shaft end of the servo motor 52 passes through the support plate 4 and is fixedly connected to the transmission worm gear 51, and upright plates 53 are fixedly installed on the left and right sides of the upper end face of the ventilation pipe 1, and a transmission rod 54 is rotatably installed between the upright plates 53 on the left and right sides.

[0025] A transmission worm gear 55 is fixedly installed in the middle of the side wall of the transmission rod 54. The transmission worm gear 55 is meshed with the transmission worm 51. A first bevel gear 56 is fixedly installed at both ends of the transmission rod 54. A second bevel gear 57 is meshed below the first bevel gear 56.

[0026] It should be noted that the user can start the servo motor 52 to make the transmission worm 51 drive the transmission worm wheel 55 to rotate. The transmission worm wheel 55 can drive the transmission rod 54 to rotate. The first bevel gear 56 and the second bevel gear 57 are meshed and connected. At this time, the transmission rod 54 can drive the first bevel gear 56 to make the second bevel gear 57 rotate. The second bevel gear 57 can drive the threaded rod 62 to rotate.

[0027] Furthermore, the cleaning mechanism 6 includes sliding grooves 12 on the left and right sides of the inner cavity of the ventilation pipe 1. A connecting rod 61 is slidably installed in the inner cavity of the sliding groove 12. A threaded rod 62 is rotatably installed on the bottom surface of the inner cavity of the limiting groove 21. The limiting plate 3 is threadedly connected to the threaded rod 62. The connecting rod 61 is rotatably connected to the limiting plate 3. An adjusting gear 63 is fixedly installed on the side wall of the connecting rod 61. A second bevel gear 57 is fixedly installed on the upper end face of the threaded rod 62.

[0028] The threaded rods 62 on the left and right sides have opposite spiral directions. Racks 64 are fixedly installed on the side walls of the inner cavity of the ventilation pipe 1. The racks 64 are meshed with the adjusting gears 63. Cleaning rollers 65 are fixedly installed between the adjusting gears 63 on the left and right sides. The cleaning rollers 65 are located in front of the filter plate 11.

[0029] It should be noted that under the constraint of the limiting groove 21 on the limiting plate 3, the limiting plate 3 can move up and down on the side wall of the threaded rod 62. With the setting of the rack 64, when the limiting plate 3 drives the connecting rod 61 to move up and down, the adjusting gear 63 will also rotate continuously, so that the cleaning roller 65 rolls on the side wall of the filter plate 11 to clean the dust in the side wall of the filter plate 11, i.e., the holes, and ensure that the entire ventilation pipe 1 has good ventilation efficiency.

[0030] Furthermore, a groove 13 communicating with the dust collection frame 7 is provided on the lower end face of the ventilation pipe 1, a storage groove 81 is provided on the inner cavity side wall of the collection hopper 8, a locking block 82 is slidably installed on the inner cavity bottom surface of the storage groove 81, a return spring 83 is fixedly installed on the inner cavity bottom surface of the storage groove 81, and a locking groove 71 is provided on the side wall of the dust collection frame 7.

[0031] The ash collection frame 7 is slidably connected to the collection hopper 8. The other end of the reset spring 83 is fixedly installed on the side wall of the locking block 82. The locking block 82 is slidably connected to the locking groove 71. The trough 13 is set in front of the filter plate 11. The outer end of the locking block 82 is set as an arc surface.

[0032] It should be noted that by pulling down the collection hopper 8, the outer end of the locking block 82 is set to an arc surface. The locking block 82 will disengage from the locking groove 71 on the ash collection frame 7, compressing the return spring 83. At this time, the collection hopper 8 and the ash collection frame 7 will be in a sliding state, which facilitates the disassembly and installation of the collection hopper 8 and greatly improves the efficiency of the user's maintenance of the ventilation pipe 1.

[0033] Working principle:

[0034] During operation, the user can start the circulating fan 91 to run the air. With the cooperation of the impeller, air can be delivered into the tunnel. With the filter plate 11, dust particles in the outside air can be intercepted and filtered during air circulation to ensure that the air delivered into the tunnel cavity is fresh and safe enough.

[0035] After the ventilation duct 1 has been used for a period of time, the user can start the servo motor 52 to make the transmission worm gear 51 drive the transmission worm wheel 55 to rotate. The transmission worm wheel 55 can drive the transmission rod 54 to rotate. The first bevel gear 56 and the second bevel gear 57 are meshed and connected. At this time, the transmission rod 54 can drive the first bevel gear 56 to make the second bevel gear 57 rotate. The second bevel gear 57 can drive the threaded rod 62 to rotate. Under the constraint of the limiting groove 21 on the limiting plate 3, the limiting plate 3 can move up and down on the side wall of the threaded rod 62. With the setting of the rack 64, when the limiting plate 3 drives the connecting rod 61 to move up and down, the adjusting gear 63 will also rotate continuously, so that the cleaning roller 65 rolls on the side wall of the filter plate 11 to clean the dust in the holes on the side wall of the filter plate 11, ensuring that the entire ventilation duct 1 has good ventilation efficiency.

[0036] Dust scraped off the side wall of the filter plate 11 can fall into the inner cavity of the collection hopper 8 through the trough 13. Then, the user can pull down the collection hopper 8. The outer end of the locking block 82 is set with an arc surface. The locking block 82 will disengage from the inner cavity of the locking groove 71 on the dust collection frame 7, so that the return spring 83 is compressed. At this time, the collection hopper 8 and the dust collection frame 7 will be in a sliding state, which facilitates the user's disassembly and installation of the collection hopper 8 and greatly improves the efficiency of the user's maintenance of the ventilation pipe 1.

[0037] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A ventilation structure for tunnel construction, comprising a ventilation pipe (1) and a filter plate (11) fixedly installed on the inner wall of the ventilation pipe (1), characterized in that: An extension frame (2) is fixedly installed on the left and right side walls of the ventilation pipe (1). A limiting groove (21) is opened around the side wall of the extension frame (2). A limiting plate (3) is slidably installed in the inner cavity of the limiting groove (21). A support plate (4) is fixedly installed on the front and rear sides of the upper end of the ventilation pipe (1). A transmission mechanism (5) is provided in the inner cavity of the support plate (4). A cleaning mechanism (6) is provided in the inner cavity of the ventilation pipe (1). A dust collection frame (7) is fixedly installed on the lower end face of the ventilation pipe (1). A collection hopper (8) is detachably installed on the side wall of the dust collection frame (7). A bracket (9) is fixedly installed on the rear side of the inner cavity of the ventilation pipe (1). A circulating fan (91) is fixedly installed in the inner cavity of the bracket (9).

2. The ventilation structure for tunnel construction according to claim 1, characterized in that: The transmission mechanism (5) includes a transmission worm gear (51) rotatably mounted between the front and rear side support plates (4). A servo motor (52) is fixedly mounted on the rear part of the upper end face of the ventilation pipe (1) via a frame. The output shaft end of the servo motor (52) passes through the support plate (4) and is fixedly connected to the transmission worm gear (51). Vertical plates (53) are fixedly mounted on the left and right sides of the upper end face of the ventilation pipe (1). A transmission rod (54) is rotatably mounted between the vertical plates (53) on the left and right sides.

3. A ventilation structure for tunnel construction according to claim 2, characterized in that: A transmission worm gear (55) is fixedly installed in the middle of the side wall of the transmission rod (54). The transmission worm gear (55) is meshed with the transmission worm (51). A first bevel gear (56) is fixedly installed at both ends of the transmission rod (54). A second bevel gear (57) is meshed below the first bevel gear (56).

4. A ventilation structure for tunnel construction according to claim 3, characterized in that: The cleaning mechanism (6) includes sliding grooves (12) on the left and right sides of the inner cavity of the ventilation pipe (1). A connecting rod (61) is slidably installed in the inner cavity of the sliding groove (12). A threaded rod (62) is rotatably installed on the bottom surface of the inner cavity of the limiting groove (21). The limiting plate (3) is threadedly connected to the threaded rod (62). The connecting rod (61) is rotatably connected to the limiting plate (3). An adjusting gear (63) is fixedly installed on the side wall of the connecting rod (61). The second bevel gear (57) is fixedly installed on the upper end face of the threaded rod (62).

5. A ventilation structure for tunnel construction according to claim 4, characterized in that: The threaded rods (62) on the left and right sides have opposite spiral directions. Racks (64) are fixedly installed on the left and right side walls of the inner cavity of the ventilation pipe (1). The racks (64) are meshed with the adjusting gears (63). A cleaning roller (65) is fixedly installed between the adjusting gears (63) on the left and right sides. The cleaning roller (65) is located in front of the filter plate (11).

6. A ventilation structure for tunnel construction according to claim 1, characterized in that: The lower end face of the ventilation pipe (1) is provided with a trough (13) that communicates with the dust collection frame (7). The inner cavity side wall of the collection hopper (8) is provided with a storage groove (81). A locking block (82) is slidably installed on the bottom surface of the inner cavity of the storage groove (81). A return spring (83) is fixedly installed on the bottom surface of the inner cavity of the storage groove (81). A locking groove (71) is provided on the side wall of the dust collection frame (7).

7. A ventilation structure for tunnel construction according to claim 6, characterized in that: The ash collection frame (7) is slidably connected to the collection hopper (8), the other end of the reset spring (83) is fixedly installed on the side wall of the locking block (82), the locking block (82) is slidably connected to the locking groove (71), the sluice (13) is set in front of the filter plate (11), and the outer end of the locking block (82) is set as an arc surface.

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