CN111828441B

CN111828441B - Air oscillation controller for railway tunnel

Info

Publication number: CN111828441B
Application number: CN202010735398.9A
Authority: CN
Inventors: 刘玉峰
Original assignee: Wenzhou Tailewei Engineering Design Co ltd
Current assignee: Wenzhou Tailewei Engineering Design Co ltd
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2021-11-19
Anticipated expiration: 2040-07-28
Also published as: CN111828441A

Abstract

The invention relates to the field of tunnels, and particularly discloses a railway tunnel air oscillation controller which comprises an arc-shaped control unit arranged on the inner wall of a tunnel, wherein the control unit comprises an outer shell, a plurality of layers of clapboards are arranged in the outer shell, a plurality of air inlets and a plurality of buffer mechanisms are arranged on each layer of clapboard, each buffer mechanism comprises a mounting groove, a first spring and a buffer sheet, the mounting groove is arranged at the bottom of the clapboard, the first spring is arranged in the mounting groove, the buffer sheets are arranged on the first springs, the buffer sheets and the air inlets are alternately arranged, and the buffer sheets are partially spherical surfaces bent downwards; a buffer cavity is formed between the two layers of clapboards, and a plurality of exhaust holes are arranged on two sides of the outer shell. The invention aims to solve the technical problem of air oscillation caused when a train enters a tunnel.

Description

Air oscillation controller for railway tunnel

Technical Field

The invention relates to the field of tunnels, and particularly discloses an air oscillation controller for a railway tunnel.

Background

The air oscillation of the railway tunnel means that when a train, a motor car or a high-speed rail or other high-speed running trains enter the railway tunnel, the train instantaneously squeezes air at the tunnel entrance to form high-pressure waves, and the high-pressure waves are reflected by the tunnel to squeeze the train, so that the train running at high speed can generate certain vibration when entering the tunnel entrance, and the effect is called as a piston effect. The existing high-speed train in China is basically a high-speed rail, the speed per hour of the high-speed rail is generally 200-300km/h, and when the high-speed rail enters a tunnel at the speed per hour in the range, only slight vibration can be generated, so that negative influence on the running of the high-speed rail can not be generated. At present, China is researching a high-speed magnetic suspension train with the speed per hour of 600Km/h, the speed per hour of the high-speed magnetic suspension train is 2-3 times that of the existing high-speed rail, when the high-speed magnetic suspension train enters a tunnel, air shock is more severe, the train can shake to a greater extent, the running of the train is seriously influenced, and safety accidents can be caused more possibly.

Disclosure of Invention

In view of this, the present invention provides an air oscillation controller for a railway tunnel to solve the technical problem of air oscillation caused when a train enters the tunnel.

In order to achieve the purpose, the invention provides the following technical scheme:

a railway tunnel air oscillation controller comprises an arc-shaped control unit arranged on the inner wall of a tunnel, wherein the control unit comprises an outer shell, a plurality of layers of partition plates are arranged in the outer shell, a plurality of air inlets and a plurality of buffer mechanisms are arranged on each layer of partition plate, each buffer mechanism comprises a mounting groove, a first spring and a buffer sheet, the mounting groove is arranged at the bottom of each partition plate, the first springs are arranged in the mounting grooves, the buffer sheets are arranged on the first springs, the buffer sheets and the air inlets are alternately arranged, and the buffer sheets are partially spherical surfaces which are bent downwards; a buffer cavity is formed between the two layers of clapboards, and a plurality of exhaust holes are arranged on two sides of the outer shell.

Optionally, the air inlet holes in two adjacent baffles are staggered.

Optionally, a plurality of buffer balls are placed in the buffer cavity, the buffer balls are made of plastics, and the buffer balls are hollow.

Optionally, the number of the buffer balls in the buffer cavities is gradually increased from bottom to top in the plurality of buffer cavities.

Optionally, be equipped with updraft ventilator on the lateral wall of shell body, be equipped with air exhauster and push type time delay switch in the updraft ventilator, push type time delay switch sets up on the diapire of baffle below, push type time delay switch is connected with the air exhauster electricity.

Optionally, a first one-way air valve is arranged on the air inlet hole of the second layer of partition plate from bottom to top, and the first one-way air valve only allows air to flow from bottom to top.

Optionally, a groove is formed in the inner wall of the tunnel, a buffer piston is arranged in the groove and comprises a piston cylinder, a plug and a second spring, the piston cylinder is fixedly arranged in the groove, the plug is arranged in the piston cylinder in a sliding and sealing manner, two ends of the second spring are respectively connected with the inner wall of the piston cylinder and the inner wall of the plug, and the plug is connected with the top wall of the outer shell; the piston cylinder is provided with a third through hole communicated with the outside, and the third through hole is provided with a third one-way air valve; the second one-way air valve only supplies air flow from bottom to top, and the third one-way air valve only supplies air flow from the piston cylinder to outside.

The working principle and the beneficial effects of the scheme are as follows:

1. be provided with the control unit at the top in tunnel in this scheme, can contact a plurality of baffles earlier when the air moves to the tunnel top, be equipped with the buffer chip on the baffle, the circulation speed of air can be reduced to the buffer chip, and because the buffer chip is the sphere, so the air can flow in the inlet port along the buffer chip to get into the buffering cavity. Because the air inlet holes between the adjacent clapboards are staggered, the air can be decelerated again when contacting the upper layer of clapboard, and the vibration caused by the air is reduced.

2. Be equipped with the buffering ball in the buffering cavity between the baffle, the quantity from the bottom up of buffering ball is more and more, so its speed is more and more slow when the air from the bottom up flows, reduces its energy of shaking gradually. Be provided with first check valve on following ascending second baffle, so the air just can't reflect back after flowing into first check valve again, and very big degree has reduced the air and has vibrate.

3. Be equipped with updraft ventilator on the lateral wall of shell body, when the air is in the twinkling of an eye when being extruded the baffle on the shell body, push type time delay switch can be pressed down in the twinkling of an eye very much to air pressure, makes the air exhauster start, and the air exhauster just can move a period of time and say that the air in the buffering cavity is taken out and is discharged outside the tunnel, avoids the air to vibrate.

4. Still be equipped with buffer piston on the inner wall in tunnel, promote the shell body to the recess in when the air vibrates, the shell body promotes the stopper post inwards this moment, and gas in the piston cylinder flows out from the one-way pneumatic valve of third, then the second spring drives stopper post and shell body and resets, and gas in the shell body flows to the piston cylinder from the shell body again this moment to absorb the air in the shell body.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment;

FIG. 2 is a schematic bottom view of FIG. 1;

FIG. 3 is a schematic view of the structure at A in FIG. 2;

fig. 4 is a longitudinal sectional view of the control unit, the damper piston and the air extracting mechanism.

The drawings are numbered as follows: tunnel 1, blast pipe 2, updraft ventilator 3, shell body 4, stopper post 5, baffle 6, inlet port 7, buffer sheet 8, push type delay switch 9, air exhauster 10, piston cylinder 11, second spring 12, first through-hole 13, second through-hole 14, first one-way pneumatic valve 15, second one-way pneumatic valve 16, third one-way pneumatic valve 17, mounting groove 18, first spring 19, buffer ball 20.

Detailed Description

The following is further detailed by way of specific embodiments:

examples

An air oscillation controller of a railway tunnel 1 is combined with a figure 1 and comprises an arc-shaped control unit and a buffer piston which are arranged on the inner wall of the tunnel 1.

With reference to fig. 2-3, the control unit includes an outer casing 4, the outer casing 4 is in a frame shape with an opening at the bottom, a plurality of layers of partition boards 6 are horizontally and fixedly arranged in the outer casing 4, and each layer of partition board 6 is provided with a plurality of air inlets 7 and a plurality of buffer mechanisms. The air inlet holes 7 in two adjacent clapboards 6 are arranged in a staggered way. Buffer gear includes mounting groove 18, first spring 19 and buffering piece 8, and mounting groove 18 sets up in 6 bottoms of baffle, and first spring 19 is fixed to be set up in mounting groove 18, and buffering piece 8 is fixed to be set up on first spring 19, and buffering piece 8 arranges with inlet port 7 in turn, and buffering piece 8 is the partial sphere of downwarping. A first one-way air valve 15 is arranged on the air inlet 7 of the second layer of the clapboard 6 from bottom to top, and the first one-way air valve 15 only supplies air to flow from bottom to top. A buffer cavity is formed between the two layers of partition plates 6, and a plurality of exhaust holes are formed in one side, facing the outside of the tunnel 1, of the outer shell 4 and communicated with the buffer cavity. A plurality of buffer balls 20 are placed in the buffer cavity, the buffer balls 20 are made of plastics, and the interior of each buffer ball 20 is hollow. In the buffer cavities, the number of the buffer balls 20 in the buffer cavities is gradually increased from bottom to top. Be equipped with updraft ventilator 3 on the lateral wall of shell body 4, updraft ventilator 3 includes air exhauster 10 and push type time delay switch 9, and air exhauster 10 is fixed to be set up in updraft ventilator 3, the exhaust hole on the shell body 4 and the inside intercommunication of updraft ventilator 3. The push-type delay switch 9 is provided with a relay, is closed after a certain time delay after being pressed and released, is fixedly arranged on the bottom wall of the lowest partition plate 6 and is electrically connected with the exhaust fan 10.

With reference to fig. 4, three grooves are circumferentially formed in the inner wall of the opening of the tunnel 1, and a buffer piston is arranged in each groove and comprises a piston cylinder 11, a plug 5 and a second spring 12. The piston cylinder 11 is fixedly arranged in the groove, the plug 5 is arranged in the piston cylinder 11 in a sliding sealing mode, two ends of the second spring 12 are fixedly connected with the inner wall of the piston cylinder 11 and the inner wall of the plug 5 respectively, and the plug 5 is fixedly connected with the top wall of the outer shell 4. The plug column 5 is provided with a first through hole 13, the outer shell 4 is provided with a second through hole 14 communicated with the first through hole 13, a second one-way air valve 16 is arranged in the second through hole 14, the piston cylinder 11 is provided with a third through hole communicated with the outside, a third one-way air valve 17 is arranged on the third through hole, the third through hole is further communicated with an exhaust pipe 2, and the exhaust pipe 2 extends out of the tunnel 1. The second one-way valve 16 only supplies air flow from the bottom to the top, and the third one-way valve 17 only supplies air flow from the piston cylinder 11 to the outside.

In the specific implementation:

when a high-speed train enters the tunnel 1 and extrudes air to the inner wall of the tunnel 1 to form a high-pressure wave, the air directly acts on the partition plate 6 at the lowest part of the outer shell 4, the push type delay switch 9 is firstly pressed and started for a period of time, and the exhaust fan 10 starts to outwards extract the air in the outer shell 4 and discharge the air to the outside of the tunnel 1, so that negative pressure is formed in the outer shell 4. Meanwhile, the air acts on the buffer sheet 8 of the clapboard 6, is subjected to first buffering and deceleration, flows into the buffer cavity through the air inlet 7, is subjected to second buffering and deceleration through the buffer ball 20, then flows to the buffer sheet 8 of the clapboard 6 at the previous layer, is subjected to third buffering and deceleration, is subjected to fourth buffering and deceleration after passing through the buffer ball 20 at the layer, and then flows upwards and is subjected to fifth and sixth buffering and deceleration. When high-pressure waves act on the partition plate 6, the outer shell 4 is pushed inwards wholly, the plug 5 moves inwards along with the high-pressure waves and discharges air in the piston cylinder 11 to the outside of the tunnel 1 from the exhaust pipe 2, the plug 5 and the outer shell 4 can return to the original position quickly under the action of the second spring 12 due to the fact that the duration of the high-pressure waves is short, the air in the outer shell 4 is sucked into the piston cylinder 11 again at the moment, the air in the outer shell 4 is consumed quickly, finally, the high-pressure wave energy formed by the air is absorbed greatly and even completely, and the amplitude of shaking of a high-speed train caused by air oscillation is reduced and even avoided.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the present invention.

Claims

1. The utility model provides a railway tunnel air vibrates controller which characterized in that: the tunnel air conditioner comprises an arc-shaped control unit arranged on the inner wall of a tunnel, wherein the control unit comprises an outer shell, a plurality of layers of clapboards are fixedly arranged in the outer shell, a plurality of air inlets and a plurality of buffer mechanisms are arranged on each layer of clapboard, each buffer mechanism comprises a mounting groove, a first spring and a buffer sheet, the mounting groove is arranged at the bottom of the clapboard, the first spring is fixedly arranged in the mounting groove, the buffer sheets are arranged on the first springs, the buffer sheets and the air inlets are alternately arranged, and the buffer sheets are partially spherical surfaces bent downwards; a buffer cavity is formed between the two layers of partition plates, and a plurality of exhaust holes are formed in one side, facing the outside of the tunnel, of the shell.

2. The railway tunnel air oscillation controller of claim 1, wherein: the air inlet holes in two adjacent clapboards are arranged in a staggered way.

3. The railway tunnel air oscillation controller of claim 2, wherein: a plurality of buffer balls are placed in the buffer cavity, the buffer balls are made of plastics, and the buffer balls are hollow.

4. The railway tunnel air oscillation controller of claim 3, wherein: in the plurality of buffer cavities, the number of the buffer balls in the buffer cavities is gradually increased from bottom to top.

5. The railway tunnel air oscillation controller of claim 4, wherein: be equipped with updraft ventilator on the lateral wall of shell body, updraft ventilator includes air exhauster and push type time delay switch, push type time delay switch sets up on the diapire of baffle below, push type time delay switch is connected with the air exhauster electricity.

6. The railway tunnel air oscillation controller of claim 5, wherein: and a first one-way air valve is arranged on the air inlet hole of the second layer of partition plate from bottom to top and only supplies air to flow from bottom to top.

7. The railway tunnel air oscillation controller of claim 6, wherein: a groove is formed in the inner wall of a tunnel entrance of the tunnel along the circumferential direction, a buffer piston is arranged in the groove and comprises a piston cylinder, a plug and a second spring, the piston cylinder is fixedly arranged in the groove, the plug is arranged in the piston cylinder in a sliding sealing manner, two ends of the second spring are respectively fixedly connected with the inner wall of the piston cylinder and the inner wall of the plug, and the plug is fixedly connected with the top wall of the outer shell; the piston cylinder is provided with a third through hole communicated with the outside, and the third through hole is provided with a third one-way air valve; the second one-way air valve only supplies air flow from bottom to top, and the third one-way air valve only supplies air flow from the piston cylinder to outside.