CN-116291714-B - Air curtain system for tunnel portal and construction method of air curtain system

CN116291714BCN 116291714 BCN116291714 BCN 116291714BCN-116291714-B

Abstract

The invention discloses an air curtain system for a tunnel portal and a construction method of the air curtain system, wherein the air curtain system for the tunnel portal comprises an air curtain machine, a mounting frame, a mounting plate and a suspension bracket, the mounting frame comprises two mounting arches, and a mounting space for accommodating the air curtain machine is formed between the two mounting arches; the mounting panel includes first plate body and second plate body, and first plate body is connected with the installation arched column, and the second plate body is connected with the air curtain machine, and the suspension bracket is installed in the installation arched column, and the suspension bracket is used for fixed contact net twine. An installation space for accommodating the air curtain machine is formed between the two installation arches arranged at intervals, the air curtain machine is clamped between the two installation arches, the two installation arches play a limiting role on the air curtain machine, the air curtain machine is conveniently installed on the installation arches through the installation plates, through installing the suspension bracket on the installation arches, the air curtain machine fixing device can be in fixed contact with the net wire through the suspension bracket, and the air curtain machine fixing device has the function of fixing the net wire.

Inventors

WANG PINGAN
REN SHAOQIANG
LIU ZHENGPING
WANG CUNBAO
WANG YUHUAN
YANG LIRAN
HE XIANLIN
LI JINKUI
ZHANG HUAN

Assignees

中铁二十局集团有限公司
中铁第一勘察设计院集团有限公司

Dates

Publication Date: 20260512
Application Date: 20230310

Claims (9)

1. An air curtain system for a tunnel portal, comprising: An air curtain machine; The installation frame comprises two installation arches which are arranged outside the tunnel portal at intervals along the extending direction of the tunnel, and an installation space for accommodating the air curtain machine is formed between the two installation arches; the mounting plate is arranged opposite to a gap between the mounting arch and the air curtain machine and comprises a first plate body and a second plate body which are connected with each other, the first plate body is connected with the mounting arch through a first fastening piece, and the second plate body is connected with the air curtain machine through a second fastening piece; The suspension bracket is arranged on the installation arch and is used for fixedly contacting the net wire; The air curtain machine is clamped between the two mounting arches, and the two mounting arches can limit the movement of the air curtain machine; The number of the air curtain machines is at least two, the at least two air curtain machines are respectively and oppositely arranged at two sides of the tunnel portal along the horizontal direction, and the air channel of the air outlet of the air curtain machines deflects towards the direction of the tunnel portal so that the included angle between the air channel of the air curtain machines and the horizontal direction is 5-15 degrees.
2. The air curtain system for a tunnel portal of claim 1, further comprising a wind deflector mechanism mounted on an outside or inside of the mounting arch such that the wind deflector mechanism, the air curtain machine, the mounting arch, the ground and an end wall of the tunnel enclose an air curtain space, the wind deflector mechanism being configured to prevent outside air from entering the air curtain space from a direction perpendicular to an extending direction of the tunnel portal.
3. The air curtain system for a tunnel portal of claim 2, wherein the wind deflector mechanism comprises a top wind deflector assembly and a side wind deflector assembly, the side wind deflector assembly is configured to shield a gap from the side of the mounting arches that communicates with the air curtain space, the top wind deflector assembly comprises a plurality of top wind deflectors that are sequentially attached, each top wind deflector is connected to the tops of two mounting arches, and each top wind deflector is configured to attach to an end wall of the tunnel portal on a side facing the tunnel portal, the top wind deflector is configured to prevent ambient air from entering the air curtain space in a vertical direction from the gap between the mounting arches and the end wall of the tunnel and the gap between the two mounting arches.
4. A wind curtain system for a tunnel portal according to claim 3, wherein the side wind deflector assembly comprises a plurality of side wind deflectors detachably connected to the wind curtain machine and/or the mounting arch, the side wind deflectors being adapted to shield the gap between the mounting arch and the end wall of the tunnel and the gap between the mounting arch and the wind curtain machine in a horizontal direction.
5. The air curtain system for a tunnel portal according to any one of claims 1 to 4, further comprising a connecting member, one end of the connecting member is connected to one of the mounting arches, and the other end of the connecting member is connected to the other of the mounting arches.
6. An air curtain system construction method, which is characterized in that the air curtain system construction method is applied to the air curtain system for a tunnel portal according to any one of claims 1 to 5, and the steps of the air curtain system construction method include: constructing a foundation for installing an arch, and pre-burying an arch fixing bolt; installing the installation arch; installing a top wind deflector assembly on top of the installation arch; Installing an air curtain machine on the installation arch; Mounting a side air deflector assembly to the mounting arches and/or the air curtain; And installing a suspension bracket on the installation arch post, and fixing the contact net wire on the suspension bracket.
7. The method of constructing an air curtain system according to claim 6, wherein the installation arch includes two columns respectively disposed at both sides of the tunnel portal and a cross beam for connecting the two columns, the cross beam being disposed at a top end of the columns, the step of constructing a foundation of the installation arch and embedding arch fixing bolts includes: Judging whether two telegraph poles respectively arranged at the left side and the right side of the tunnel portal exist in a preset range outside the tunnel portal; If yes, constructing the foundations of the two stand columns, and embedding foundation bolts of the two stand columns.
8. The air curtain system construction method of claim 7, wherein the step of installing the mounting arches comprises: Installing two upright posts; installing one cross beam to be connected with the two upright posts respectively, and installing the other cross beam to be connected with the two telegraph poles; and a connecting piece for connecting the two cross beams respectively is arranged.
9. The method of claim 8, wherein said step of installing an air curtain machine to said mounting arches comprises; adjusting air outlet angles of air curtain machines positioned at two sides of the tunnel portal; And installing the mounting plate on the air curtain machine and the upright post.

Description

Air curtain system for tunnel portal and construction method of air curtain system Technical Field The invention relates to the technical field of tunnel mouth air curtain machine construction, in particular to an air curtain system for a tunnel mouth and a construction method of the air curtain system. Background At present, a high-pressure air curtain machine is arranged at a tunnel opening, cold air is blocked from entering a tunnel through a mode of forming an air curtain by blowing by the high-pressure air curtain machine, and in traditional construction, the fixing device for fixing the air curtain machine can only be used for fixing the air curtain machine, so that the function of the conventional air curtain machine fixing device is single. In view of this, there is a need to provide a new air curtain system and air curtain system construction method for tunnel portal that solves or at least alleviates the above-mentioned technical drawbacks. Disclosure of Invention The invention mainly aims to provide an air curtain system for a tunnel portal and a construction method of the air curtain system, and aims to solve the technical problem that an existing air curtain machine fixing device is single in function. In order to achieve the above object, the present invention provides an air curtain system for a tunnel portal, the air curtain system for a tunnel portal comprising: An air curtain machine; The installation frame comprises two installation arches which are arranged outside the tunnel portal at intervals along the extending direction of the tunnel, and an installation space for accommodating the air curtain machine is formed between the two installation arches; the mounting plate is arranged opposite to a gap between the mounting arch and the air curtain machine and comprises a first plate body and a second plate body which are connected with each other, the first plate body is connected with the mounting arch through a first fastening piece, and the second plate body is connected with the air curtain machine through a second fastening piece; And the suspension bracket is arranged on the installation arch and is used for fixedly contacting the net wires. In an embodiment, the number of the air curtain machines is at least two, the at least two air curtain machines are respectively and oppositely arranged at two sides of the tunnel portal along the horizontal direction, and the air channel of the air outlet of the air curtain machines deflects towards the direction of the tunnel portal so that the included angle between the air channel of the air curtain machines and the horizontal direction is 5-15 degrees. In an embodiment, the air curtain system for a tunnel portal further comprises a wind deflector mechanism mounted on the outside or inside of the mounting arch such that the wind deflector mechanism, the air curtain machine, the mounting arch, the ground and the end wall of the tunnel enclose an air curtain space, the wind deflector mechanism being configured to prevent outside air from entering the air curtain space from a direction perpendicular to the extending direction of the tunnel portal. In an embodiment, the wind deflector mechanism comprises a top wind deflector assembly and a side wind deflector assembly, wherein the side wind deflector assembly is used for shielding a gap between the side direction of the installation arch and the air curtain space, the top wind deflector assembly comprises a plurality of top wind deflectors which are sequentially attached, each top wind deflector is connected with the top of the two installation arches, each top wind deflector faces the side wall of one side of the tunnel portal and is used for being attached to the end wall of the tunnel portal, and the top wind deflector is used for preventing outside air from entering the air curtain space along the vertical direction from the gap between the installation arch and the end wall of the tunnel and the gap between the two installation arches. In an embodiment, the side air deflector assembly comprises a plurality of side air deflectors detachably connected to the air curtain machine and/or the mounting arches, the side air deflectors serving to block the gap between the mounting arches and the end walls of the tunnel and the gap between the mounting arches and the air curtain machine in the horizontal direction. In one embodiment, the air curtain system for a tunnel portal further comprises a connector, one end of the connector is connected to one of the mounting arches, and the other end of the connector is connected to the other mounting arch. In addition, the invention also provides an air curtain system construction method, which is applied to the air curtain system for the tunnel portal, and comprises the following steps: constructing a foundation for installing an arch, and pre-burying an arch fixing bolt; installing the installation arch; installing a top wind deflector assembly on top of th