CN212927918U - Poisonous and harmful gas reinforcing treatment device in TBM construction - Google Patents
Poisonous and harmful gas reinforcing treatment device in TBM construction Download PDFInfo
- Publication number
- CN212927918U CN212927918U CN202021390152.4U CN202021390152U CN212927918U CN 212927918 U CN212927918 U CN 212927918U CN 202021390152 U CN202021390152 U CN 202021390152U CN 212927918 U CN212927918 U CN 212927918U
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- China
- Prior art keywords
- air
- main beam
- air cylinder
- air outlet
- tee joint
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 238000010276 construction Methods 0.000 title claims abstract description 17
- 231100000614 poison Toxicity 0.000 title claims abstract description 7
- 230000007096 poisonous effect Effects 0.000 title claims abstract description 7
- 230000003014 reinforcing effect Effects 0.000 title claims description 4
- 238000009423 ventilation Methods 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 19
- 231100000331 toxic Toxicity 0.000 claims description 8
- 230000002588 toxic effect Effects 0.000 claims description 8
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 5
- 239000003063 flame retardant Substances 0.000 claims description 5
- 239000004568 cement Substances 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 claims 5
- 239000004744 fabric Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000005641 tunneling Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
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- Ventilation (AREA)
Abstract
The utility model relates to a poisonous and harmful gas enhancement treatment device in TBM construction, which utilizes a TBM ventilation system and uses an air duct cloth to manufacture a connecting air duct, and an air outlet of an air duct storage bin and an air inlet of a relay fan are connected in a sealing way by the connecting air duct; and manufacturing a tee joint, wherein one end of the tee joint is connected with an air outlet at the upper part of a No. 2 main beam, the other two ends of the tee joint are connected with a soft air cylinder, namely an air cylinder at the upper part of the main beam and an air cylinder at the lower part of the main beam, the air cylinder at the upper part of the main beam reaches the tail part of the shield along the upper part of the main beam, and the air cylinder at the lower part of the main beam firstly faces downwards and then. Utility model's beneficial effect: 1. the relay fan is communicated with the air outlet of the air pipe storage cylinder, and air directly enters the relay fan without forming an air wall. 2. The air supply and the air exhaust of the tunnel face are smooth, and the gas is not accumulated.
Description
Technical Field
The utility model belongs to the field of TBM (tunnel boring machine), and relates to the improvement of a ventilation system.
Background
The TBM is a special engineering machine for tunneling, integrates mechanical, electrical, hydraulic, sensing and information technologies, and has the functions of excavating cut rock bodies, conveying ballast, assembling tunnel arches, laying anchor rods, spraying anchor support, measuring, guiding, correcting deviation and the like. TBM has been widely used in subway, railway, highway, municipal works, hydraulic tunnels and other projects.
In the tunneling operation, the poisonous gas becomes a road barricade for tunnel construction. How to safely and efficiently solve the problem of releasing toxic gases is urgent. Fresh air is pressed in by adopting a secondary compressed air system in normal construction ventilation of the TBM, taking the single TBM tunneling of a main tunnel as an example, a tunnel opening one-station press-in ventilation system is adopted in the TBM construction ventilation, a set of axial flow fan is arranged near a branch tunnel opening, and the diameter of a soft air pipe is phi 2.2 m. Fresh air is pressed into the tail part of the TBM through the soft air pipe, is connected with the air pipe storage cylinder, and is continuously pressed forward through the booster fan on the rear matching body. And the dust removal fan matched with the tunnel face is used for filtering the foul air on the tunnel face through the TBM main beam and the pipeline and then discharging the foul air backwards.
The construction of a certain hydraulic engineering in Xinjiang adopts TBM, the tunnel face collapses in the TBM tunneling process, the equipment gas monitor gives an instantaneous alarm, the alarm value reaches 114% LEL, the construction operation is stopped immediately on site, and the construction operator turns off the power supply and then removes from the site and strengthens ventilation.
At present, TBM ventilation has the disadvantages that:
the distance between the relay fan and the air outlet of the air pipe storage cylinder is 50cm, an air wall is easily formed at the position of the relay fan, and circulating air is formed in a tunnel, so that toxic and harmful gases are not easily discharged.
And (II) the air outlet of the TBM secondary fan is about 30 meters away from the tunnel face, toxic and harmful gases such as gas and the like usually appear in the excavation process of the tunnel face, and the air outlet is too far away from the tunnel face to completely remove the toxic and harmful gases generated in the tunnel.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the purpose is in order to solve above technical problem, provides a poisonous and harmful gas reinforcing administers device in TBM construction.
The technical scheme of the utility model: a poisonous and harmful gas enhancement treatment device in TBM construction utilizes a TBM ventilation system, a wind cylinder cloth is used for manufacturing a connecting wind cylinder, and the wind pipe storage bin air outlet and a relay fan air inlet are in closed connection by the connecting wind cylinder; and manufacturing a tee joint, wherein one end of the tee joint is connected with an air outlet at the upper part of a No. 2 main beam, the other two ends of the tee joint are connected with a soft air cylinder, namely an air cylinder at the upper part of the main beam and an air cylinder at the lower part of the main beam, the air cylinder at the upper part of the main beam reaches the tail part of the shield along the upper part of the main beam, and the air cylinder at the lower part of the main beam firstly faces downwards and then.
Preferably: and the flange ring I of the air outlet of the air pipe storage bin and the flange ring II of the connecting air cylinder are connected by bolts.
Further, the method comprises the following steps: an antistatic flame-retardant sealing washer is arranged between the flange ring I and the flange ring II.
Preferably: the tee joint is welded with an air outlet at the upper part of the main beam and is fixedly connected with the soft air duct in a bonding and combining manner through a fixed hoop and a bolt.
It is preferable that: the diameter of the soft wind tube is 0.6 m.
The tee joint is reduced in diameter at one end connected with the air outlet at the upper part of the No. 2 main beam, and the reduced diameter section is inserted into the air outlet at the upper part of the No. 2 main beam, so that the connection is tight and convenient.
The utility model has the advantages that: 1. the relay fan is communicated with the air outlet of the air pipe storage cylinder, and air directly enters the relay fan without forming an air wall. 2. The air supply and the air exhaust of the tunnel face are smooth, and the gas is not accumulated.
Drawings
FIG. 1 is a view of an original wind pipe storage bin and a relay fan;
FIG. 2 is a connection diagram of the connection duct of the present invention;
FIG. 3 is a view of the device between the air outlet at the upper part of the original No. 2 main beam and the tunnel face;
FIG. 4 is a view showing the device between the air outlet at the upper part of the No. 2 main beam and the tunnel face after the improvement of the utility model;
FIG. 5 is a schematic view of the connection fastening structure of the connection air duct;
FIG. 6 is a schematic of a tee;
in the figure, 1-connecting air duct, 2-air duct storage bin air outlet, 3-relay fan air inlet, 4-tee joint, No. 5-2 main beam upper air outlet, 6-main beam upper air duct, 7-main beam lower air duct, 8-main beam lower air duct inlet, 9-shield tail, 10-inside cutter head, 11-relay fan, 12-flange ring I, 13-flange ring II and 14-air duct storage bin.
Detailed Description
Measures taken against problem (one) of the background art:
(1) the distance between the relay fan air inlet 3 and the air pipe storage bin air outlet 2 (the distance between the press-in type air supply 2.2m and the air duct air outlet) is 50cm, and the air pipe storage bin air outlet 2 and the relay fan air inlet 3 are connected in a sealing mode through the connecting air duct 1, so that circulating air is prevented from being formed. The self-made connecting air duct is made of air duct cloth made of materials with the characteristics of static electricity resistance, flame retardance, flexibility and the like, and the technical requirement of ventilation safety of the gas tunnel is met.
(2) According to the sizes of the air outlet of the air pipe storage bin and the air inlet of the relay fan, the air cylinder is processed and connected in advance, and the air permeability of the air cylinder is checked.
(3) And (5) transporting the processed connecting air duct to the tail part of the TBM rear matched 11# trolley. A flange ring I12 (with the thickness of 2 mm) is welded at the air outlet 2 of the air pipe storage bin and the air inlet 3 of the relay fan respectively, and the flange ring II 13 (with the thickness of 2 mm) is bonded at the two ends of the connecting air duct 1 by flame-retardant cement so as to reduce the air leakage rate of the connecting part. The connecting air duct is installed corresponding to the air duct storage bin air outlet and the relay fan air inlet 3 through bolts, and the flange ring I and the flange ring II are fixed (an antistatic and flame-retardant sealing gasket can be arranged between the flange ring I and the flange ring II to further increase the sealing performance) so as to ensure that the press-in type air supply is connected with the relay fan air inlet, prevent the relay fan from sucking dirty air and supply the dirty air to a working surface again.
(4) The arrangement personnel mainly check the connection of the part to ensure that the connection is fixed effectively and reliably.
Measures taken against problem (two) of the background art:
one end of the tee joint 4 is connected with an air outlet 5 at the upper part of a No. 2 main beam, and the other end is connected with a soft air duct with the diameter of 0.6m, namely an air duct 6 at the upper part of the main beam, so that the soft air duct is extended to the tail part 9 of the shield; the other end of the main beam passes through a soft air duct with the diameter of 0.6m, namely a main beam lower air duct 7, and the air is guided to the interior 10 of the cutter head. The air supply is stable and reliable, the air duct is hung straight and firmly bound without air leakage, and an air pipe opening is connected to the inner part of the cutter head (in the inlet cutter box) and the tail part of the TBM shield, and meanwhile, the opening of the upper cover opening of the belt channel at the rear part of the TBM shield is kept to form an air return gas passage to prevent gas accumulation.
The tee joint is welded or connected with an air outlet at the upper part of the main beam in a threaded fit manner, and is sleeved on the pipe orifice of a part of the tee joint with the soft air cylinder and then bonded together; after the periphery of the fixed hoop is sleeved with the fixed hoop, the fixed hoop is fixed by bolts and is screwed tightly.
Claims (6)
1. The utility model provides a poisonous and harmful gas reinforcing administers device in TBM construction, utilizes TBM ventilation system, characterized by: the wind pipe storage bin air outlet (2) and the relay fan air inlet (3) are in closed connection through the connecting wind pipe (1); manufacturing a tee joint (4), wherein one end of the tee joint (4) is connected with an air outlet (5) at the upper part of a No. 2 main beam, the other two ends of the tee joint are connected with a soft air cylinder which is respectively a main beam upper air cylinder (6) and a main beam lower air cylinder (7), the main beam upper air cylinder (6) reaches a shield tail part (9) along the upper part of the main beam, and the main beam lower air cylinder (7) firstly turns downwards and then turns to the lower part of the main beam and extends to the inside (10) of the cutter.
2. The device of claim 1 for enhancing the treatment of toxic and harmful gases in TBM construction, which is characterized in that: a flange ring I (12) is welded on each of the air pipe storage bin air outlet (2) and the relay fan air inlet (3), the flange rings II (13) are bonded at two ends of the connecting air cylinder (1) by flame-retardant cement, and the flange ring I (12) of the air pipe storage bin air outlet (2) is connected with the flange ring II (13) of the connecting air cylinder (1), and the flange ring I (12) of the relay fan air inlet (3) is connected with the flange ring II (13) of the connecting air cylinder (1) by bolts.
3. The device of claim 2 for enhancing the treatment of toxic and harmful gases in TBM construction, which is characterized in that: an antistatic flame-retardant sealing washer is arranged between the flange ring I (12) and the flange ring II (13).
4. The device of claim 1 for enhancing the treatment of toxic and harmful gases in TBM construction, which is characterized in that: the tee joint (4) is welded with an air outlet (5) at the upper part of the main beam and is fixedly connected with the soft air cylinder in a bonding and combining manner by a hoop and a bolt.
5. The device of claim 1 for enhancing the treatment of toxic and harmful gases in TBM construction, which is characterized in that: the diameter of the soft wind tube is 0.6 m.
6. The device of claim 1 for enhancing the treatment of toxic and harmful gases in TBM construction, which is characterized in that: one end of the tee joint (4) connected with the upper air outlet (5) of the No. 2 main beam is reduced, and the reduced section is inserted into the upper air outlet (5) of the No. 2 main beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021390152.4U CN212927918U (en) | 2020-07-15 | 2020-07-15 | Poisonous and harmful gas reinforcing treatment device in TBM construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021390152.4U CN212927918U (en) | 2020-07-15 | 2020-07-15 | Poisonous and harmful gas reinforcing treatment device in TBM construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212927918U true CN212927918U (en) | 2021-04-09 |
Family
ID=75330215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021390152.4U Expired - Fee Related CN212927918U (en) | 2020-07-15 | 2020-07-15 | Poisonous and harmful gas reinforcing treatment device in TBM construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212927918U (en) |
-
2020
- 2020-07-15 CN CN202021390152.4U patent/CN212927918U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220815 Address after: No. 197, Anju South Road, Shuimogou District, Urumqi City, Xinjiang Uygur Autonomous Region 830000 Patentee after: Xinjiang Erqisi River Investment and development (Group) Co.,Ltd. Address before: 241 Yangzijiang Road, shayibak District, Urumqi, Xinjiang Uygur Autonomous Region 830000 Patentee before: XINJIANG IRTYSH RIVER BASIN DEVELOPMENT ENGINEERING CONSTRUCTION ADMINISTRATION |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210409 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |