CN220726351U - Ventilating and dust removing device for excavating large-section tunnel by cantilever heading machine - Google Patents
Ventilating and dust removing device for excavating large-section tunnel by cantilever heading machine Download PDFInfo
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- CN220726351U CN220726351U CN202322548500.6U CN202322548500U CN220726351U CN 220726351 U CN220726351 U CN 220726351U CN 202322548500 U CN202322548500 U CN 202322548500U CN 220726351 U CN220726351 U CN 220726351U
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- 239000000428 dust Substances 0.000 title claims abstract description 36
- 238000005192 partition Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000009423 ventilation Methods 0.000 claims description 14
- 238000003466 welding Methods 0.000 claims description 11
- 238000005086 pumping Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 7
- 239000007921 spray Substances 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000005641 tunneling Effects 0.000 description 3
- 206010010904 Convulsion Diseases 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 230000036461 convulsion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 208000028571 Occupational disease Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
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- Ventilation (AREA)
Abstract
The utility model relates to the field of tunnel construction, in particular to a ventilating and dedusting device for excavating a large-section tunnel by a cantilever heading machine; the full-section secondary rib is covered with a full-section partition material, a ventilator is arranged at the top of the full-section partition door frame and is connected with an air supply bag, an exhaust fan is arranged on the full-section secondary rib, and an air exhaust bag is arranged on the exhaust fan; the device of the utility model improves the dust settling efficiency from the standpoint of improving the configuration of an exhaust system and equipment, reasonably applies the air principle, improves a spray dust settling circulation system, achieves remarkable effect, reduces dust on each working surface before and after a hole, achieves the dust settling effect and achieves the aim of parallel construction conditions.
Description
Technical Field
The utility model relates to the field of tunnel construction, in particular to a ventilating and dedusting device for excavating a large-section tunnel by a cantilever heading machine.
Background
In the new tunnel construction of the tunnel adjacent to the business line, in order to reduce the disturbance of excavation on the existing tunnel, the construction of the cantilever type heading machine becomes one of main equipment for tunneling of tunnel machinery, and the defect is that a large amount of dust can be generated in the tunneling process, the self-contained spraying can only play a role in cooling a cutting head, and the dust fall effect cannot be brought. In the excavating process, the construction environment is poor, the secondary lining and inverted arch construction in a hole are seriously influenced, the construction efficiency between the whole working procedures of the tunnel is influenced when the tunneller is used for excavating construction, the energy for marking the idle power consumption of machinery is large, and the exertion of the machine efficiency is influenced. These adverse factors also bring harm to labor sanitation and safety production, worsen the working environment of constructors, and lead the number of respiratory tract occupational diseases to be increased continuously.
Disclosure of Invention
The utility model provides a ventilation dust removal device for a large-section tunnel excavated by a cantilever excavator, which aims to provide a good construction environment for constructors and solve the technical problem that a large amount of dust is generated during excavation by the excavator.
In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a cantilever development machine excavates big section tunnel ventilation dust collector, includes the self-propelled hydraulic trestle that sets up in big section tunnel, the welding has full section to cut off the portal on the platform of self-propelled hydraulic trestle both sides, and the welding has full section to cut off between portal and the big section tunnel inner wall and inferior rib, and the distance between full section to cut off the rib edge and the big section tunnel inner wall is 10cm-20cm, full section is the secondary rib to be covered and is covered with full package and cuts off the material, the ventilation blower is installed at full section to cut off portal top, and the ventilation blower is connected with the air supply bag, install the air exhauster on the full section to cut off the portal, the air exhauster is installed the air pumping bag.
Working principle: the ventilator blows air to the working space in the hole to blow up dust and reduce the amount of the dust attached to the cantilever heading machine. Set up full section at the shaft middle part (inverted arch lining end position), add the air exhauster above that and carry out the convulsions, when separating the raise dust and overflow, can constantly take out gas, and the dust can take out along with gas together, reduces the dust of each working face around in the hole, plays the dust fall effect, reaches parallel construction condition.
Compared with the prior art, the utility model has the following beneficial effects:
the device of the utility model improves the dust settling efficiency from the standpoint of improving the configuration of an exhaust system and equipment, reasonably applies the air principle, improves a spray dust settling circulation system, achieves remarkable effect, reduces dust on each working surface before and after a hole, achieves the dust settling effect and achieves the aim of parallel construction conditions.
Drawings
FIG. 1 is a schematic structural view of a ventilating and dedusting device for excavating a large-section tunnel by a cantilever heading machine.
The figures are labeled as follows:
the hydraulic trestle comprises a 1-self-propelled hydraulic trestle, a 2-full-section partition portal frame, 3-full-section secondary ribs, 4-full-package partition materials, a 5-ventilator and a 6-exhaust fan.
Detailed Description
The utility model is further illustrated below with reference to specific examples.
Examples
As shown in figure 1, a cantilever development machine excavates big section tunnel ventilation dust collector, including setting up the self-propelled hydraulic trestle 1 in big section tunnel, the welding has full section to cut off portal 2 on the platform of self-propelled hydraulic trestle 1 both sides, and has full section to cut off between portal 2 and the big section tunnel inner wall and cut off the secondary rib 3, and the distance between secondary rib 3 edge of full section and the big section tunnel inner wall is 10cm-20cm, full section is covered with full package and is cut off material 4 on the secondary rib 3, full section cuts off portal 2 top and installs ventilation blower 5, and ventilation blower 5 is connected with the air supply bag, install air exhauster 6 on the secondary rib 3 of full section, air exhauster 6 installs the air pumping bag.
Furthermore, inclined struts are arranged at the welding positions of the full-section partition door frame 2 and the platforms at the two sides of the self-propelled hydraulic trestle 1, and the thickness of a welding seam of a contact surface is not less than 6mm.
Further, the full-package partition material 4 is a partition plate.
Further, the full-section secondary rib 3 comprises a plurality of horizontal ribs and vertical ribs which are welded with the full-section partition portal frame 2 and are arranged horizontally and vertically, the edges of the horizontal ribs and the vertical ribs are welded with arched edge ribs together, and the distance between the arched edge ribs and the inner wall of the large-section tunnel is 10cm-20cm; and reinforcing ribs are also connected between the transverse ribs and the vertical ribs.
Further, the ventilator 5 is a variable frequency ventilator.
The implementation flow is as follows: construction preparation, ventilation frame installation, exhaust fan/ventilator installation, hanging of a baffle and a wind receiving bag, and quality inspection
And excavating a tunnel face in the hole to a certain length, and when the inverted arch lining is required to start to follow. A partition device and an exhaust facility are arranged on an inverted arch trestle (namely, a self-propelled hydraulic trestle 1). The hydraulic trestle 1 is checked before erection, so that the trestle can be ensured to operate well. And (3) carrying out raw material inspection on required section steel and the like, and carrying out entrance inspection and acceptance on related equipment.
Before the full-section partition door frame 2 is installed, the positions of the rib top painting lines on the two sides of the trestle are marked, and the positions of the contact surfaces of the trestle are cleaned. The main rib of the profile steel portal frame is required to be processed into a semi-finished product in a processing plant and welded on site. And welding with the tops of the platforms at two sides of the trestle and arranging diagonal braces, wherein the thickness of a welding line of a contact surface is required to be not less than 6mm. After the full-section partition door frame 2 is welded, full-section secondary ribs 3 are welded from the door frame to the periphery, and the radius of the outermost edge steel frame is smaller than the clearance of the primary support by about 10cm-20cm so as to ensure that the partition can not touch the primary support surface when the self-propelled hydraulic trestle 1 moves forward.
After the primary rib and the secondary rib are arranged, a variable frequency ventilator and an exhaust fan are arranged above the portal frame, and then the outside of the portal frame is fully blocked, and only one vehicle channel space is reserved on the trestle in the whole section range. When the tunnel face is tunneled, the exhaust fan is started to relieve dust in the tunnel and prevent the dust from overflowing to the lining section.
Along with the tunneling of the face, the air supply bag should be lengthened at any time, and the length of the air supply bag and the face should be not more than 30m. The exhaust bag at the end of the exhaust fan follows along with the inverted arch lining, and the air bag at the opening of the cavity is lengthened by a part of the inverted arch length every time the air bag advances, so that the air outlet is ensured to be close to the opening of the cavity 1-2m.
Considering that dust in the hole is sucked outside the hole to influence the environment of the hole, the inside of the lining of the hole is provided with annular spraying. So as to inhibit dust from flying outside the hole, and a drainage ditch is arranged to conduct and drain the spray water and the water for cleaning the hole opening.
Working principle: the ventilator 5 blows air to the working space in the tunnel to blow up dust and reduce the amount of dust attached to the cantilever excavator. Set up full section at the shaft middle part (inverted arch lining end position), add air exhauster 6 above that and carry out the convulsions, when separating the raise dust and overflow, can constantly take out gas, and the dust can take out along with gas together, reduces the dust of each working face around in the hole, plays the dust fall effect, reaches parallel construction condition.
Claims (5)
1. The utility model provides a cantilever development machine excavates big section tunnel ventilation dust collector, its characterized in that, including setting up self-propelled hydraulic trestle (1) in big section tunnel, welding has full section on self-propelled hydraulic trestle (1) both sides platform to cut off portal (2), and the welding has full section to cut off between portal (2) and the big section tunnel inner wall and inferior rib (3), and the distance between full section inferior rib (3) edge and the big section tunnel inner wall is 10cm-20cm, full section inferior rib (3) are covered with full package and cut off material (4), ventilation blower (5) are installed at full section to cut off portal (2) top, and ventilation blower (5) are connected with the air supply bag, install air exhauster (6) on full section inferior rib (3), the air exhauster (6) are installed the air pumping bag.
2. The ventilation and dust removal device for excavating large-section tunnels of the cantilever heading machine according to claim 1, wherein inclined struts are arranged at welding positions of the full-section partition door frame (2) and platforms at two sides of the self-propelled hydraulic trestle (1), and the thickness of a welding seam of a contact surface is not less than 6mm.
3. The ventilation and dust removal device for excavating a large-section tunnel by using the cantilever heading machine according to claim 1, wherein the full-package partition material (4) is a partition plate.
4. The ventilation and dust removal device for excavating a large-section tunnel by using the cantilever heading machine according to claim 1, wherein the full-section secondary rib (3) comprises a plurality of horizontal and vertical transverse ribs and vertical ribs which are welded together with the full-section partition door frame (2), the edges of the transverse ribs and the vertical ribs are welded with arched edge ribs together, and the distance between the arched edge ribs and the inner wall of the large-section tunnel is 10cm-20cm; and reinforcing ribs are also connected between the transverse ribs and the vertical ribs.
5. The device for ventilating and dedusting a large-section tunnel excavated by a cantilever heading machine according to claim 1, wherein the ventilator (5) is a variable-frequency ventilator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322548500.6U CN220726351U (en) | 2023-09-20 | 2023-09-20 | Ventilating and dust removing device for excavating large-section tunnel by cantilever heading machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322548500.6U CN220726351U (en) | 2023-09-20 | 2023-09-20 | Ventilating and dust removing device for excavating large-section tunnel by cantilever heading machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220726351U true CN220726351U (en) | 2024-04-05 |
Family
ID=90497349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322548500.6U Active CN220726351U (en) | 2023-09-20 | 2023-09-20 | Ventilating and dust removing device for excavating large-section tunnel by cantilever heading machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220726351U (en) |
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2023
- 2023-09-20 CN CN202322548500.6U patent/CN220726351U/en active Active
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