Cover plate assembly capable of relieving pneumatic effect of tunnel

Abstract

According to the cover plate assembly capable of relieving the pneumatic effect of the tunnel, a cover plate body is arranged at the top of a groove in the tunnel in a buckled mode, and vent holes are formed in the plate face of the cover plate body; the main pipe is arranged in the groove and is communicated with the air extracting end of the air extracting pump, the multiple branch pipes are sequentially arranged in the length direction of the tunnel, one ends of the multiple branch pipes are limited in the multiple vent holes respectively, the other ends of the multiple branch pipes are fixed and communicated with the main pipe, and each branch pipe is connected with a normally-closed electromagnetic valve in series; the air extracting pump and the normally-closed electromagnetic valves can be electrically connected with an external railway control center, and the external railway control center can control the normally-closed electromagnetic valves in front of the train head in the tunnel to be opened. The external railway control center can control the air extracting pump and the normally-closed electromagnetic valve in front of the train head in the tunnel to be opened, the air extracting pump rapidly and effectively extracts air in front of the train in the tunnel, and therefore pressure waves in front of the train running at a high speed can be effectively relieved.

Description

Technical Field

[0001] The invention relates to the field of tunnel facilities, and more particularly to a cover plate assembly capable of alleviating aerodynamic effects of a tunnel. Background Art

[0002] In recent years, my country's high-speed railway has developed rapidly. The increase in train operating speed has promoted the convenience of transportation, but it has also brought a series of scientific problems and technical challenges. For example, with the increase in train operating speed, the aerodynamic effect is more significant, which brings about problems such as increased driving resistance, increased noise, and micro-pressure waves at the tunnel entrance. Research on aerodynamic problems during high-speed operation of high-speed trains has become an indispensable part of the development of high-speed railways. When a high-speed train enters the entrance of a tunnel, an initial compression wave will be formed in front of the front of the train. This compression wave propagates forward at the local speed of sound. When it reaches the exit of the tunnel, most of the energy is reflected back into the tunnel in the form of an expansion wave, and a small part radiates outward in the form of a low-frequency pulse wave, forming a micro-pressure wave. The fluctuation of air pressure in the tunnel will also have an adverse effect on the ancillary facilities in the tunnel and the overall structure of the tunnel.

[0003] At present, the conventional approach to the above-mentioned problem is to set up link structures at the entrance and exit of the tunnel or to open auxiliary tunnels in the tunnel. Although the above-mentioned structures can achieve the effect of pressure relief and buffering to a certain extent, their pressure relief effects are limited.

[0004] The main function of the groove cover is to cover the drainage grooves and cable grooves on both sides of the rails. The existing groove cover also has through holes, which have a certain pressure relief and buffering effect, but the effect is not significant.

[0005] Therefore, how to provide a cover plate assembly that can alleviate the aerodynamic effect of the tunnel so that it can overcome the above-mentioned problems is an issue that technical personnel in this field urgently need to solve. Summary of the invention

[0006] In view of this, the present invention provides a cover plate assembly capable of alleviating the aerodynamic effect of a tunnel.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A cover plate assembly capable of alleviating aerodynamic effect of a tunnel, comprising:

[0009] A cover plate body, the cover plate body being buckled on the top of the groove in the tunnel, a plurality of the cover plate bodies being sequentially arranged along the length direction of the tunnel, and a vent hole being opened on the plate surface of the cover plate body;

[0010] An exhaust component, the exhaust component includes a main pipe, an air pump, a branch pipe and a normally closed solenoid valve, the main pipe is arranged in the groove and one end of which is closed and the other end is connected to the air extraction end of the air pump, a plurality of branch pipes are arranged in sequence along the length direction of the tunnel, one end of the plurality of branch pipes is respectively limited in the plurality of vents, the other ends of the plurality of branch pipes are fixed to and connected to the main pipe, and each branch pipe is serially connected with a normally closed solenoid valve; the air pump and the plurality of normally closed solenoid valves can be electrically connected to an external railway control center, and the external railway control center can control the opening of the normally closed solenoid valve in front of the train head in the tunnel.

[0011] It can be known from the above technical solution that, compared with the prior art, the present invention discloses a cover assembly that can alleviate the aerodynamic effect of the tunnel. The present invention opens a vent hole on the cover body, and a branch pipe is arranged in the vent hole. The branch pipe is connected to the main pipe, and the main pipe is connected to the external vacuum pump. A normally closed solenoid valve is connected in series on the branch pipe. The external railway control center can control the vacuum pump and the normally closed solenoid valve in front of the train head in the tunnel to open. The vacuum pump quickly and effectively extracts the air in front of the train in the tunnel, so that the pressure wave in front of the high-speed train can be effectively alleviated.

[0012] Preferably, the cover body is rectangular and has two long sides with notches respectively. This design facilitates installation and transportation of the cover body.

[0013] Preferably, a filter screen is further included, the vent hole has a stepped surface, and the filter screen is embedded in the vent hole and abuts against the stepped surface. Impurities in the tunnel will not enter the branch pipe.

[0014] Preferably, the groove has three groove bodies arranged in sequence along the width direction of the tunnel, and the normally closed electromagnetic valve is fixed to the inner side wall of one of the groove bodies closest to the middle of the tunnel. The branch pipe is as close to the middle of the tunnel as possible to ensure the pressure relief buffer effect.

[0015] Preferably, the air pump is arranged at one end outside the tunnel. The air pump can reliably discharge the air in the tunnel to the outside of the tunnel.

[0016] Preferably, two main pipes are provided and each is arranged in the groove on both sides of the tunnel, and the opening ends of the two main pipes are both connected to the air extraction end of one air extraction pump. This design can further improve the pressure relief buffering effect of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the arrangement of a cover assembly in a tunnel that can alleviate the aerodynamic effect of the tunnel;

[0019] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0020] Figure 3 yes Figure 1 A partial enlarged view of point B in the middle;

[0021] Figure 4 A schematic diagram of an exhaust assembly in a cover assembly that can alleviate the aerodynamic effect of a tunnel.

[0022] In the figure:

[0023] 1 is the cover body, 10 is the vent hole, 11 is the notch, 2 is the main pipe, 3 is the air pump, 4 is the branch pipe, 5 is the normally closed electromagnetic valve, 6 is the filter screen, and 7 is the tunnel. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The present invention discloses a cover plate assembly capable of alleviating aerodynamic effect of a tunnel. The present invention provides an air vent 10 on a cover plate body 1, a branch pipe 4 is arranged in the air vent 10, the branch pipe 4 is connected to a main pipe 2, the main pipe 2 is connected to an external air pump 3, a normally closed electromagnetic valve 5 is connected in series to the branch pipe 4, an external railway control center can control the air pump 3 and the normally closed electromagnetic valve 5 in front of a train head in a tunnel 7 to open, the air pump 3 quickly and effectively extracts air in front of the train in the tunnel 7, so that the pressure wave in front of the high-speed train can be timely and effectively depressurized and buffered; the main pipe 2, the branch pipe 4 and the normally closed electromagnetic valve 5 are all located in a groove below the cover plate body 1, and will not occupy the space in the tunnel 7, and the main pipe 2, the branch pipe 4 and the normally closed electromagnetic valve 5 can be inspected and maintained by opening the cover plate, so that the later maintenance is relatively convenient; a filter screen 6 is embedded in the air vent 10, and impurities in the tunnel 7 will not enter the branch pipe 4.

[0026] Example

[0027] See attached Figure 1-4 The whole and part of the structure of an embodiment of the present invention is a schematic diagram. The present invention specifically discloses a cover assembly capable of alleviating the aerodynamic effect of a tunnel, including:

[0028] The cover plate body 1 is rectangular and cast by concrete. The cover plate body 1 is buckled on the top of the groove in the tunnel 7. The wide side of the cover plate body 1 is parallel to the length direction of the groove. A plurality of cover plate bodies 1 are sequentially arranged along the length direction of the tunnel 7. The long sides of two adjacent cover plate bodies 1 along the length direction of the tunnel 7 are closely arranged. A circular vent hole 10 is opened on the plate surface of the cover plate body 1.

[0029] An exhaust assembly, the exhaust assembly includes a main pipe 2, an air pump 3, a branch pipe 4 and a normally closed electromagnetic valve 5; the main pipe 2 is arranged in the groove and one end of the main pipe is closed and the other end is connected to the air extraction end of the air pump 3, a plurality of branch pipes 4 are sequentially arranged along the length direction of the tunnel 7, one end of the plurality of branch pipes 4 is respectively limited in a plurality of vents 10, the other ends of the plurality of branch pipes 4 are fixed to and connected to the main pipe 2, and a normally closed electromagnetic valve 5 is serially connected to each branch pipe 4;

[0030] The air pump 3 and the plurality of normally closed electromagnetic valves 5 can be electrically connected to an external railway control center, and the external railway control center can control the opening and closing of the air pump 3 and the normally closed electromagnetic valves 5;

[0031] The train is equipped with a positioning module electrically connected to the external railway control center. Tunnel 7 is equipped with a sensor for monitoring the position of the train, and the sensor is also electrically connected to the external railway control center. When the train passes through tunnel 7, the external railway control center will monitor the position and speed of the train in tunnel 7 in real time and accurately. When the train enters tunnel 7, the external railway control center can control the normally closed solenoid valve 5 in front of the train head in tunnel 7 to open. At the same time, the air pump 3 will also be started, and the branch pipe 4 in front of the train head will extract the air in tunnel 7 and discharge it to the outside of tunnel 7. In this way, the air pressure wave in front of the train in tunnel 7 can be effectively alleviated.

[0032] The two long sides of the cover body 1 are respectively provided with a notch 11 . After the installation of two adjacent cover bodies 1 along the length direction of the tunnel 7 is completed, the notches 11 of the two are directly opposite to each other. The design of the notch 11 is convenient for carrying the cover body 1 .

[0033] More specifically, it also includes a circular filter screen 6, the vent hole 10 has a circular step surface, the filter screen 6 is embedded in the vent hole 10 and abuts against the step surface, the upper end surface of the filter screen 6 is flush with the upper plate surface of the cover body 1, and large particles of impurities in the tunnel 7 will not enter the branch pipe 4.

[0034] The groove has three groove bodies arranged in sequence along the width direction of the tunnel 7 , the normally closed solenoid valve 5 is fixed to the inner side wall of a groove body closest to the middle of the tunnel 7 , and the vent hole 10 is directly opposite to the groove body closest to the middle of the tunnel 7 in the upper and lower positions.

[0035] The air pump 3 is arranged at one end outside the tunnel 7 , so as to facilitate the discharge of gas in the tunnel 7 to the outside of the tunnel 7 .

[0036] Two main pipes 2 are provided and are respectively arranged in grooves on both sides of the tunnel 7 . The open ends of the two main pipes 2 are both connected to the air extraction end of an air extraction pump 3 .

[0037] When the train enters tunnel 7, the external railway control center controls the vacuum pump 3 and the normally closed solenoid valve 5 in front of the train head in tunnel 7 to open, and the normally closed solenoid valve 5 behind the train head to close, and the branch pipe 4 in front of the train head extracts the air in tunnel 7 and discharges it to the outside of tunnel 7. The air pressure wave formed in front of the train in tunnel 7 can be discharged to the outside of the tunnel in a timely and effective manner, thereby achieving a buffering effect.

[0038] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0039] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cover plate assembly capable of alleviating aerodynamic effect in a tunnel, characterized in that: include: A cover plate body (1), the cover plate body (1) being buckled on the top of the groove in the tunnel (7), a plurality of the cover plate bodies (1) being arranged in sequence along the length direction of the tunnel (7), and a ventilation hole (10) being provided on the plate surface of the cover plate body (1); An exhaust assembly, the exhaust assembly comprising a main pipe (2), an air extraction pump (3), a branch pipe (4) and a normally closed electromagnetic valve (5); the main pipe (2) is arranged in the groove and has one end closed and the other end connected to the air extraction end of the air extraction pump (3); a plurality of branch pipes (4) are arranged in sequence along the length direction of the tunnel (7); one end of each of the plurality of branch pipes (4) is limited in a plurality of vent holes (10); the other ends of each of the plurality of branch pipes (4) are fixed to and connected to the main pipe (2); each of the branch pipes (4) is serially connected to one of the normally closed electromagnetic valves (5); the air extraction pump (3) and the plurality of normally closed electromagnetic valves (5) can be electrically connected to an external railway control center; the external railway control center can control the opening of the normally closed electromagnetic valve (5) in front of the train head in the tunnel (7).

2. A cover plate assembly capable of alleviating tunnel aerodynamic effect according to claim 1, characterized in that: The cover plate body (1) is rectangular and has two long sides each with a notch (11).

3. A cover plate assembly capable of alleviating tunnel aerodynamic effect according to claim 1, characterized in that: It also comprises a filter screen (6), the vent hole (10) has a stepped surface, and the filter screen (6) is embedded in the vent hole (10) and abuts against the stepped surface.

4. The cover plate assembly capable of alleviating tunnel aerodynamic effect according to claim 1, characterized in that: The groove has three groove bodies arranged in sequence along the width direction of the tunnel (7), and the normally closed electromagnetic valve (5) is fixed to the inner side wall of one of the groove bodies closest to the middle of the tunnel (7).

5. The cover plate assembly capable of alleviating tunnel aerodynamic effect according to claim 1, characterized in that: The air pump (3) is arranged at one end outside the tunnel (7).

6. The cover plate assembly capable of alleviating tunnel aerodynamic effect according to claim 1, characterized in that: The main pipes (2) are provided with two pipes, each of which is arranged in the grooves on both sides of the tunnel (7), and the opening ends of the two main pipes (2) are both connected to the air extraction end of one of the air extraction pumps (3).

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