CN115419450A - Small-section tunnel ventilation device based on local internal circulation principle - Google Patents
Small-section tunnel ventilation device based on local internal circulation principle Download PDFInfo
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- CN115419450A CN115419450A CN202211274386.6A CN202211274386A CN115419450A CN 115419450 A CN115419450 A CN 115419450A CN 202211274386 A CN202211274386 A CN 202211274386A CN 115419450 A CN115419450 A CN 115419450A
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- 238000009423 ventilation Methods 0.000 title claims abstract description 71
- 239000004744 fabric Substances 0.000 claims abstract description 30
- 230000005641 tunneling Effects 0.000 claims description 35
- 239000000428 dust Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 17
- 238000009412 basement excavation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/006—Ventilation at the working face of galleries or tunnels
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/04—Air ducts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/04—Air ducts
- E21F1/06—Duct connections
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/08—Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/20—Drawing-off or depositing dust
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Ventilation (AREA)
Abstract
The invention discloses a small-section tunnel ventilation device based on a local internal circulation principle, which comprises a PVC air pipe, wherein a positive pressure air guide pipe is embedded at the side end of the PVC air pipe, an axial flow fan is communicated with the side end of the positive pressure air guide pipe, a fan motor is installed at the upper end of the axial flow fan, an axial flow fan base is fixedly connected at the bottom end of the axial flow fan, a connecting base is fixedly connected at the lower end of the axial flow fan base, the side end of the axial flow fan is communicated with a piece of air duct cloth through the positive pressure air guide pipe, the lower end of the connecting base is fixedly connected with a heading machine right side platform, a heading machine left side platform is fixedly connected at the side end of the heading machine right side platform, and base fastening bolts are fixed on the axial flow fan base and the connecting base. The invention relates to a small-section tunnel ventilation device based on a local internal circulation principle, which achieves the purpose of small-section tunnel ventilation through the arrangement of a structure.
Description
Technical Field
The invention relates to the technical field of tunnel engineering equipment, in particular to a small-section tunnel ventilation device based on a local internal circulation principle.
Background
With the continuous development of tunnel engineering, ventilation of large-section tunnels is researched more at the present stage, and ventilation technology research and ventilation mode research of small-section tunnels are less. The small-section tunnel has the characteristics of small section area, narrow construction working surface and the like, and can not completely take care of the ventilation result of the large-section tunnel. Therefore, the invention provides the ventilation device which combines ventilation and excavation operation of the cantilever type tunneling machine, so as to achieve the purposes of higher ventilation efficiency and dust fall under the limited construction operation surface.
At present, because of the limitation of smaller construction operation area of a small-section tunnel, the existing ventilation device still applies a single ventilation pipeline in a hole to achieve the purpose of ventilation, and the residual construction operation area occupied by other construction machines, personnel and construction materials is considered, so that more ventilation equipment cannot be laid, the means is single, and the ventilation effect is poor.
Disclosure of Invention
The invention aims to provide a small-section tunnel ventilation device based on a local internal circulation principle, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a small-section tunnel ventilation device based on a local internal circulation principle comprises a PVC air pipe, wherein a positive pressure air guide pipe is embedded at the side end of the PVC air pipe, an axial flow fan is communicated with the side end of the positive pressure air guide pipe, a fan motor is installed at the upper end of the axial flow fan, an axial flow fan base is fixedly connected to the bottom end of the axial flow fan, a connecting base is fixedly connected to the lower end of the axial flow fan base, the side end of the axial flow fan is communicated with a fan cloth through the positive pressure air guide pipe, the lower end of the connecting base is fixedly connected with a right platform of a heading machine, a left platform of the heading machine is fixedly connected to the side end of the right platform of the heading machine, and base fastening bolts are fixed on the axial flow fan base and the connecting base.
Preferably, the positive pressure air guide pipe and the air duct cloth are connected in a zipper type.
Preferably, the connecting base and the right platform of the heading machine are fixedly welded.
Preferably, the axial flow fan is installed reversely.
Preferably, the PVC air pipe, the positive pressure air guide pipe and the air cylinder cloth are arranged in a folding manner.
Compared with the prior art, the invention has the beneficial effects that:
1. the ventilation device can be matched with the existing ventilation pipeline in the hole, and achieves better ventilation effect than that of laying single ventilation equipment under the objective condition that the construction operation surface is limited; the ventilation device can be arranged on the cantilever type tunneling machine and shares a working surface with the tunneling machine, so that the redundant construction operation area is not occupied, and the operation of other construction machinery and personnel is not influenced; the invention can solve the problems of blocked sight of the tunneling machine operator and reduced construction efficiency caused by a large amount of dust in the tunnel face tunneling process in a targeted manner.
2. The ventilation efficiency in the process of tunnel face tunneling is improved in a targeted manner, and the dust concentration of tunnel face flour is reduced; the super-short digging caused by the obstruction of the sight of an operator due to the overlarge concentration of the dust on the face is effectively reduced, and the tunneling speed of the face is accelerated; most of the traditional ventilation devices in the tunnel are separately considered with the tunneling machine and are respectively installed and erected, and the traditional ventilation devices in the tunnel do not have the function of pertinence ventilation and dust reduction on a specific part in the tunnel. The situation that the occupied redundant working surface influences other personnel and mechanical operation can be generated in the limited construction operation surface. This patent combines ventilation unit and entry driving machine to consider together, makes it the common working face, can not occupy unnecessary operation face to erect the mutual auxiliary operation in the air pipe that is close to the face alone, from becoming local internal circulation system, the dust density that can make pointed references and reduce face excavation in-process for the diffusion velocity of dust, optimize ventilation effect, improve ventilation efficiency.
Drawings
FIG. 1 is a side view of the body of the present invention;
FIG. 2 is a top view of the body of the present invention;
FIG. 3 is a side view of a portion of the structure of the body of the present invention;
fig. 4 is a connection diagram of the axial flow fan base and the connection base according to the present invention.
In the figure: 1-PVC air pipe; 2-positive pressure air guide pipe; 3-an axial flow fan; 4-a fan motor; 5-axial fan base; 6-connecting a base; 7-left platform of the development machine; 8-a right platform of the development machine; 9-air duct cloth; 10-base fastening bolt.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: a small-section tunnel ventilation device based on a local internal circulation principle comprises a PVC air pipe 1, a positive pressure air guide pipe 2 is embedded at the side end of the PVC air pipe 1, an axial flow fan 3 is communicated with the side end position of the positive pressure air guide pipe 2, a fan motor 4 is installed at the upper end of the axial flow fan 3, an axial flow fan base 5 is fixedly connected to the bottom end of the axial flow fan 3, a connecting base 6 is fixedly connected to the lower end of the axial flow fan base 5, air duct cloth 9 is communicated with the side end of the axial flow fan 3 through the positive pressure air guide pipe 2, the lower end of the connecting base 6 is fixedly connected with a heading machine right side platform 8, a heading machine left side platform 7 is fixedly connected to the side end position of the heading machine right side platform 8, and base fastening bolts 10 are fixed on the axial flow fan base 5 and the connecting base 6.
Malleation guide duct 2, dryer cloth 9 adopt zip fastener formula to connect the setting, connect base 6, the welded fastening setting of entry driving machine right side platform 8, and axial fan 3 adopts reverse installation setting, and PVC tuber pipe 1, malleation guide duct 2, dryer cloth 9 are the folded form setting.
A use method of a small-section tunnel ventilation device based on a local internal circulation principle comprises the following steps:
s1, setting a tunneling direction as a positive direction, firstly opening an axial flow fan outside a tunnel before tunneling, and pre-ventilating through a wind tube cloth 9 to ensure that the wind tube cloth 9 has enough wind flow to directly reach the position near a tunnel face;
and S2, starting the tunneling machine to perform tunneling operation, wherein dust begins to be generated near the tunnel face, and further starting the ventilation device, wherein the axial flow fan 3 is reversely mounted, so that the original positions of the air suction opening and the air supply opening are exchanged to generate a back-pressure air exhaust effect, and the dust on the tunnel face is discharged out of the tunnel through the PVC air pipe 1 and the positive-pressure air guide pipe 2. Therefore, the air duct cloth 9, the PVC air duct 1 and the positive pressure air guide duct 2 form a local internal circulation near the tunnel face through the positive pressure of the fan outside the tunnel and the counter pressure in the tunnel respectively;
s3, in the process of ventilation and tunneling, the positive pressure air guide pipe 2 is a telescopic air pipe with a steel ring, the maximum extension amount is 25m, the connection between the positive pressure air guide pipe 2 and the air duct cloth 9 is disconnected when the positive pressure air guide pipe 2 reaches 20-25m and the primary support operation is carried out while the tunneling machine and the axial flow fan 3 are in a stop operation state at the moment, the positive pressure air guide pipe 2 and the air duct cloth 9 are disconnected, the positive pressure air guide pipe 2 is restored to the initial telescopic state again, the air duct cloth 9 is lengthened to 25m, after the support operation is finished, the axial flow fan 3 is opened when the tunneling is carried out again, the tunneling and the ventilation are continued, the circulation is repeated, and the purpose of replacing the ventilation pipe while the support operation is not influenced is achieved;
s4, the PVC air pipe 1 and the positive pressure air guide pipe 2 are connected in an embedded mode and are reinforced through an annular hoop; the positive pressure air guide pipe 2 and the air duct cloth 9 of the right part in the figure 1 are connected by adopting a zipper type; the axial flow fan base 5 is connected with the connecting base 6 through bolts; the connecting base 6 and the right platform 8 of the heading machine are connected by welding.
The working principle is as follows: the ventilation device in the tunnel hole is different from the traditional ventilation device in arrangement, most ventilation devices in the tunnel hole are independently placed on the working surface in the tunnel hole and are matched with each other, the dust-settling and ventilation effects are achieved in the construction operation, and the influence on the body health of construction operators is reduced while the construction is ensured. However, the installation and use of the ventilation equipment according to this method are restricted by the size of the construction work area, and if the construction work area is large, a large cross-section tunnel such as a highway tunnel can be used, and if the construction work area is small, there is no sufficient work area for installing the relevant other ventilation equipment.
The invention is different from the technical background of a large-section tunnel ventilation device, and the ventilation device of the invention is characterized in that the construction working surface of a small-section tunnel is small, and provides a ventilation mode for mutually combining a tunneling machine and the ventilation device.
1, the working surface is shared with the tunneling machine, so that the occupied working surface is not occupied, and the normal operation of other working surfaces is not influenced;
2, the existing ventilation pipelines in the tunnel are close to the tunnel face and are 1.5m ahead of the PVC hard ventilation pipeline of the ventilation device, so that dust can be discharged out of the tunnel in a targeted manner through an axial flow fan reversely mounted after the air is sent out of the tunnel to the tunnel face, the two ventilation pipelines are matched with each other to form local internal circulation, and the dust falling in the tunneling process of the tunnel face has a targeted effect;
3 the ventilation device adopts the matching combination of the PVC hard ventilation pipe, the positive pressure ventilation pipe with the steel wire ring and the air bag, fully considers the deformation influence of overlarge air pressure on the ventilation pipe when the air is discharged from two sides of the axial flow fan, reduces the air loss, and improves the air supply, air discharge and dust fall effects.
As shown in fig. 1-4 mentioned above, the operation of the present invention will now be described as follows:
1. the tunneling direction is specified to be the positive direction, the axial flow fan outside the tunnel is firstly opened before tunneling, and pre-ventilation is carried out through the air duct cloth 9, so that the air duct cloth 9 is ensured to have enough air flow to directly reach the position near the tunnel face.
2. The heading machine is started to perform heading operation, dust begins to be generated near the tunnel face, and the ventilation device is further started. Because the axial flow fan 3 adopts a reverse installation mode, the original positions of the air suction opening and the air supply opening are exchanged to generate a back pressure air exhaust effect, and dust on the tunnel face is discharged out of the tunnel through the PVC air pipe 1 and the positive pressure air guide pipe 2. Therefore, the air duct cloth 9, the PVC air duct 1 and the positive pressure air guide duct 2 form a local internal circulation near the tunnel face through the positive pressure of the fan outside the tunnel and the counter pressure inside the tunnel respectively.
3. In the process of ventilation and tunneling, as can be seen from fig. 3, the positive pressure air guide pipe 2 is a telescopic air pipe with a steel ring, and the maximum elongation is 25m. According to the requirement of actual tunneling circulation footage, when the positive pressure air guide pipe 2 reaches 20-25m and the tunneling machine and the axial flow fan 3 are both in a stop operation state while primary support operation is carried out, the connection between the positive pressure air guide pipe 2 and the air duct cloth 9 is disconnected, the positive pressure air guide pipe 2 is restored to the original telescopic state again, and the air duct cloth 9 is lengthened to 25m. After the supporting operation is finished, the axial flow fan 3 is opened when the tunneling is carried out again, the tunneling and the ventilation are continued, and the circulation is repeated according to the above steps, so that the aim of replacing the ventilation pipeline while the supporting operation is not influenced is fulfilled.
4. The PVC air pipe 1 on the left side of the figure 1 is connected with the positive pressure air guide pipe 2 in an embedded mode and is reinforced through an annular hoop; the positive pressure air guide pipe 2 and the air duct cloth 9 of the right part in the figure 1 are connected by adopting a zipper type; the axial flow fan base 5 is connected with the connecting base 6 through bolts; the connecting base 6 and the right platform 8 of the heading machine are connected by welding.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a small cross section tunnel ventilation unit based on local inner loop principle, includes PVC tuber pipe (1), its characterized in that: the PVC air pipe comprises a PVC air pipe (1), a positive pressure air guide pipe (2) is embedded at the side end of the PVC air pipe (1), an axial flow fan (3) is communicated at the side end position of the positive pressure air guide pipe (2), a fan motor (4) is installed at the upper end of the axial flow fan (3), an axial flow fan base (5) is fixedly connected at the bottom end of the axial flow fan (3), a connecting base (6) is fixedly connected at the lower end of the axial flow fan base (5), air duct cloth (9) is communicated at the side end of the axial flow fan (3) through the positive pressure air guide pipe (2), the lower end of the connecting base (6) is fixedly connected with a development machine right side platform (8), a development machine left side platform (7) is fixedly connected at the side end position of the development machine right side platform (8), and base fastening bolts (10) are fixed on the axial flow fan base (5) and the connecting base (6).
2. The ventilation device for the small-section tunnel based on the local internal circulation principle as claimed in claim 1, wherein: the positive pressure air guide pipe (2) and the air duct cloth (9) are connected in a zipper type.
3. The ventilation device for the small-section tunnel based on the local internal circulation principle as claimed in claim 2, wherein: the connecting base (6) and the right platform (8) of the heading machine are fixedly welded.
4. A small-section tunnel ventilation device based on the local internal circulation principle as claimed in claim 3, characterized in that: the axial flow fan (3) is arranged in a reverse installation mode.
5. A small-section tunnel ventilation device based on the local internal circulation principle as claimed in claim 4, characterized in that: the PVC air pipe (1), the positive pressure air guide pipe (2) and the air duct cloth (9) are arranged in a folding manner.
6. The use method of the small-section tunnel ventilation device based on the local internal circulation principle is characterized in that:
s1, setting a tunneling direction as a positive direction, firstly opening an axial flow fan outside a tunnel before tunneling, and pre-ventilating through air duct cloth (9) to ensure that the air duct cloth (9) has enough air flow to directly reach the position near a tunnel face;
s2, starting the tunneling machine to perform tunneling operation, starting to generate dust near the tunnel face, starting the ventilation device, and generating a back-pressure air exhaust effect by interchanging the positions of an original air suction opening and an original air supply opening due to the fact that the axial flow fan (3) is installed in a reverse direction, wherein the dust on the tunnel face is discharged out of the tunnel through the PVC air pipe (1) and the positive-pressure air guide pipe (2). Therefore, the air duct cloth (9), the PVC air duct (1) and the positive pressure air guide duct (2) form a local internal circulation near the tunnel face through the positive pressure of the fan outside the tunnel and the counter pressure inside the tunnel respectively;
s3, in the process of ventilation and tunneling, the positive pressure air guide pipe (2) is a telescopic air pipe with a steel ring, the maximum elongation is 25m, and according to the requirement of actual tunneling circulation footage, when the positive pressure air guide pipe (2) reaches 20-25m, the primary support operation is carried out while the tunneling machine and the axial flow fan (3) are in a stop operation state at the time, the connection between the positive pressure air guide pipe (2) and the air cylinder cloth (9) is disconnected, the positive pressure air guide pipe (2) is restored to the initial telescopic state again, the air cylinder cloth (9) is lengthened to 25m, after the support operation is finished, the axial flow fan (3) is opened again when tunneling is carried out again, the tunneling and ventilation are continued, and the circulation is carried out, so that the aim of replacing the ventilation pipe while the support operation is not influenced is achieved;
s4, the PVC air pipe (1) and the positive pressure air guide pipe (2) are connected in an embedded mode and reinforced through an annular hoop; the positive pressure air guide pipe (2) and the air cylinder cloth (9) of the right part of the figure 1 are connected by a zipper; the axial flow fan base (5) is connected with the connecting base (6) through bolts; the connecting base (6) is connected with the right platform (8) of the heading machine by welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211274386.6A CN115419450A (en) | 2022-10-18 | 2022-10-18 | Small-section tunnel ventilation device based on local internal circulation principle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211274386.6A CN115419450A (en) | 2022-10-18 | 2022-10-18 | Small-section tunnel ventilation device based on local internal circulation principle |
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| CN115419450A true CN115419450A (en) | 2022-12-02 |
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| CN202211274386.6A Pending CN115419450A (en) | 2022-10-18 | 2022-10-18 | Small-section tunnel ventilation device based on local internal circulation principle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116690654A (en) * | 2023-08-09 | 2023-09-05 | 北京易圣安成机器人有限公司 | Robot operation platform with ventilation function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116690654A (en) * | 2023-08-09 | 2023-09-05 | 北京易圣安成机器人有限公司 | Robot operation platform with ventilation function |
| CN116690654B (en) * | 2023-08-09 | 2023-10-13 | 北京易圣安成机器人有限公司 | Robot operation platform with ventilation function |
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