Sound insulation protection device for tunnel blasting

Abstract

The utility model relates to the technical field of tunnel blasting protection, in particular to a tunnel blasting sound insulation protection device which comprises a plurality of protection blocks forming protection at a tunnel portal, the tunnel portal is closed after the multiple protection blocks are spliced, the outer rings of the protection blocks are fixed to a tunnel, and the outer rings of the protection blocks are fixed to the tunnel portal. An inner shaft core is arranged on the inner sides of inner rings of the multiple protection blocks, an outer shaft core is arranged at one end of the inner shaft core, the inner sides of the multiple spliced protection blocks are connected through the inner shaft core and the outer shaft core, and buffering pieces used for containing air pressure after blasting are arranged on the inner shaft core and the inner sides, close to a tunnel, of the protection blocks. According to the scheme, a plurality of spliced protection blocks are arranged, the size is small, mounting and dismounting are convenient, carrying and storage are convenient, and the use reliability can be guaranteed; and secondly, the arranged buffer piece can provide an accommodating space for airflow at the moment of blasting while buffering and sound insulation are achieved, so that damage to the exhaust fan is avoided or reduced, and stable exhaust work is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of tunnel blasting protection, and in particular to a tunnel blasting sound insulation protection device. Background Art

[0002] Tunnels are the focus and key projects of highway and railway construction. The commonly used excavation methods are drilling and blasting, shield method and tunnel boring machine method. The drilling and blasting method has strong adaptability to geological conditions and low excavation cost. It is particularly suitable for the construction of hard rock tunnels, broken rock tunnels and a large number of short tunnels. Therefore, the drilling and blasting method is still the commonly used tunnel excavation method at home and abroad.

[0003] After checking the public (announcement) number: CN212870956U, a tunnel blasting sound insulation protection device is disclosed. This technology discloses "including a protective net fixing seat, a plurality of fixing rods are arranged on the outer side of the protective net fixing seat, a protective net is fixedly connected to the inner side of the protective net fixing seat, a dust removal bin is arranged on one side of the protective net, and a plurality of water bags are arranged inside the dust removal bin, and other technical solutions. Through the arrangement of the ventilation pipe and the ventilation fan, the harmful gas in the cableway can be quickly discharged at the end of the blasting. Through the arrangement of the dust removal bin and the water bag, clear water can be sprayed out during the blasting for preliminary dust removal and other technical effects";

[0004] With respect to the above-mentioned related technologies, the inventor believes that the integrated device is not easy to carry and store, and the installation and disassembly takes a long time; although the device is provided with dust removal and exhaust components, during the blasting process, the air pressure in the tunnel will increase instantly, and the exhaust fan alone cannot exhaust it in a short time. Without buffer time and space, the large airflow will affect the normal operation of the exhaust fan and easily cause damage to the exhaust fan;

[0005] In order to solve the above problems, the present application proposes a tunnel blasting sound insulation protection device. Utility Model Content

[0006] In order to solve the drawbacks caused by the integrated structure and the problem of being unable to quickly consume the instantaneous air pressure of the explosion, the present application provides the following technical solutions.

[0007] The present application provides a tunnel blasting sound insulation protection device, including a protection block forming a protection at the tunnel entrance, wherein the protection block is provided in plurality, and the tunnel entrance is closed after the plurality of protection blocks are spliced ​​together, the outer ring of the protection block is fixed to the tunnel, the inner side of the inner ring of the plurality of protection blocks is provided with an inner shaft core, one end of the inner shaft core is provided with an outer shaft core, the inner sides of the plurality of protection blocks after splicing are connected through the inner shaft core and the outer shaft core, the inner shaft core and the inner side of the protection block close to the tunnel are provided with a buffer for containing the air pressure after blasting, the protection block is provided with a driving member for discharging the air inside the tunnel to the outside, the driving member is located on the buffer member in the protection block, and a sound insulation layer is provided inside the protection block.

[0008] Preferably, an inner retaining ring is provided on the inner side of the outer ring of the protective block, and an outer retaining ring is provided on the outer side of the outer ring of the protective block. The inner retaining ring and the outer retaining ring form a groove docking with the tunnel entrance, and the protective block is fixedly connected to the tunnel by bolts passing through the inner retaining ring and the outer retaining ring.

[0009] Preferably, the inner ring of the protective block is provided with an arc groove, and a plurality of the arc grooves are spliced ​​to form a through hole for inserting the inner shaft core, the inner shaft core is threadedly connected to the outer shaft core, and the ends of the inner shaft core and the outer shaft core are provided with baffles that clamp the inner and outer ends of the protective block through a screw.

[0010] Preferably, the buffer member on the inner shaft core includes a central buffer plate sliding in the inner shaft core and arranged between the central buffer plate and the inner shaft core, and the outer shaft core is provided with an exhaust hole for exhausting the inner shaft core.

[0011] Preferably, the buffer member on the protection block comprises an arc-shaped buffer plate slidably arranged on a side of the protection block close to the tunnel and a buffer spring arranged between the arc-shaped buffer plate and the protection block.

[0012] Preferably, the driving member includes an exhaust pipe fixed on the arc-shaped buffer plate and an exhaust fan fixed inside the exhaust pipe, a sound-absorbing net is provided on the side of the exhaust pipe close to the outside of the tunnel, and a filter plate is also provided on the side of the exhaust pipe close to the outside of the tunnel, one end of the exhaust pipe away from the arc-shaped buffer plate is spirally connected to a mounting cover, and the filter plate is installed in the mounting cover, and ventilation holes are provided on the mounting cover and the arc-shaped buffer plate.

[0013] In summary, this application includes the following beneficial technical effects:

[0014] Firstly, a plurality of spliced ​​protective blocks are provided, which are small in size, convenient to install and disassemble, and easy to carry and store, and can ensure reliability during use; secondly, the buffer parts provided can provide a space to accommodate the airflow at the moment of explosion while providing buffering and sound insulation, thereby avoiding or reducing damage to the exhaust fan and facilitating the stable operation of the exhaust operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a rear view in the embodiment of the present application;

[0016] Figure 2 It is the main view in the embodiment of the present application;

[0017] Figure 3 This is a front view of the local protection block after installation in the embodiment of the present application;

[0018] Figure 4 It is a test half-section diagram in the embodiment of the present application;

[0019] Figure 5is a half-section view of a protective block in an embodiment of the present application;

[0020] Figure 6 It is a schematic diagram of a half-section of a protective block and partial decomposition of internal components in an embodiment of the present application.

[0021] Explanation of the reference numerals: 1. Protective block; 2. Inner retaining ring; 3. Outer retaining ring; 4. Arc groove; 5. Inner shaft core; 6. Outer shaft core; 7. Center buffer plate; 8. Buffer spring; 9. Exhaust hole; 10. Arc buffer plate; 11. Exhaust pipe; 12. Buffer spring; 13. Exhaust fan; 14. Sound-absorbing net; 15. Filter plate; 16. Mounting cover; 17. Sound insulation layer. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1 - Figure 6 This application is described in further detail.

[0023] Reference Figure 1 - Figure 6 A tunnel blasting sound insulation protection device includes a protection block 1 for forming protection at the tunnel entrance. The protection block 1 is arranged in multiple pieces. After the multiple protection blocks 1 are spliced ​​together, the tunnel entrance is closed. The outer ring of the protection block 1 is fixed to the tunnel. The inner side of the inner ring of the multiple protection blocks 1 is provided with an inner shaft core 5, and one end of the inner shaft core 5 is provided with an outer shaft core 6. The inner sides of the multiple protection blocks 1 after splicing are connected through the inner shaft core 5 and the outer shaft core 6. The inner shaft core 5 and the inner side of the protection block 1 close to the tunnel are both provided with a buffer for containing the air pressure after blasting. The protection block 1 is provided with a driving member for discharging the air inside the tunnel to the outside. The driving member is located on the buffer member in the protection block 1, and a sound insulation layer 17 is provided inside the protection block 1.

[0024] Reference Figure 3 - Figure 4 An inner retaining ring 2 is provided on the inner side of the outer ring of the protective block 1, and an outer retaining ring 3 is provided on the outer side of the outer ring of the protective block 1. The inner retaining ring 2 and the outer retaining ring 3 form a groove docking with the tunnel entrance. The protective block 1 is fixedly connected to the tunnel by bolts penetrating the inner retaining ring 2 and the outer retaining ring 3. The inner retaining ring 2 and the outer retaining ring 3 are partially inserted into the tunnel entrance and fixed by radial bolts, which has the advantage of high reliability.

[0025] Reference Figure 1 - Figure 4 The inner ring of the protective block 1 is provided with an arc groove 4, and multiple arc grooves 4 are spliced ​​to form a through hole for inserting the inner shaft core 5. The inner shaft core 5 is threadedly connected to the outer shaft core 6, and the ends of the inner shaft core 5 and the outer shaft core 6 are provided with baffles that clamp the inner and outer ends of the protective block 1 by screws. The arc groove 4 is arranged to cooperate with the inner shaft core 5 and the outer shaft core 6 to ensure the connection of the inner ring after the protective block 1 is spliced, so that the multiple protective blocks 1 form a stable protective body to ensure the protective effect.

[0026] Reference Figure 4 - Figure 5 The buffer on the inner shaft core 5 includes a central buffer plate 7 sliding in the inner shaft core 5 and a buffer plate 8 arranged between the central buffer plate 7 and the inner shaft core 5. The outer shaft core 6 is provided with an exhaust hole 9 for exhausting the inner shaft core 5; the buffer on the protective block 1 includes an arc-shaped buffer plate 10 slidingly arranged on the side of the protective block 1 close to the tunnel and a buffer spring 12 arranged between the arc-shaped buffer plate 10 and the protective block 1. The two different groups of buffers are used to provide a space for accommodating the airflow after the explosion, so as to avoid a large airflow directly impacting the protective block 1 and buffer the exhaust time.

[0027] Reference Figure 5 - Figure 6 The driving member includes an exhaust pipe 11 fixed on the arc-shaped buffer plate 10 and an exhaust fan 13 fixed inside the exhaust pipe 11. A sound-absorbing net 14 is provided on the side of the exhaust pipe 11 close to the outside of the tunnel. A filter plate 15 is also provided on the side of the exhaust pipe 11 close to the outside of the tunnel. The end of the exhaust pipe 11 away from the arc-shaped buffer plate 10 is spirally connected to a mounting cover 16, and the filter plate 15 is installed in the mounting cover 16. Ventilation holes are provided on the mounting cover 16 and the arc-shaped buffer plate 10. The exhaust fan 13 ensures the discharge of air inside the tunnel, and cooperates with the buffer on the protective block 1 to avoid damage to the exhaust fan 13 caused by the impact of airflow formed by the explosion.

[0028] Working principle: When installing, first install multiple protection blocks 1 on the tunnel entrance, and the inner retaining ring 2 and the outer retaining ring 3 are distributed on the inner and outer sides of the end of the tunnel entrance and fixed by bolts. Multiple protection blocks 1 are spliced ​​with multiple inner shaft cores 5 to form a circular hole, and the inner shaft core 5 is inserted into the circular hole from the inside to the outside, and then the outer shaft core 6 is screwed with the inner shaft core 5 from the outside to protect the outer end of the tunnel entrance;

[0029] Before blasting, all exhaust fans 13 are first turned on to pump the inside of the tunnel to a negative pressure state, and then blasting is carried out. The airflow formed by the blasting is discharged outward through the exhaust fan 13 and the exhaust pipe 11. At the same time, the arc buffer plate 10 and the central buffer plate 7 are pushed outward to provide a buffer space for the airflow to avoid strong airflow directly impacting the exhaust fan 13 and causing damage. After buffering, the gas is gradually discharged outward under the action of the exhaust fan 13.

[0030] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A tunnel blasting sound insulation protection device, comprising a protection block (1) forming a protection at a tunnel entrance, characterized in that: The protective block (1) is provided in multiple configurations. After the multiple protective blocks (1) are spliced ​​together, the tunnel entrance is sealed. The outer ring of the protective block (1) is fixed to the tunnel. The inner side of the inner ring of the multiple protective blocks (1) is provided with an inner shaft core (5). One end of the inner shaft core (5) is provided with an outer shaft core (6). The inner sides of the multiple protective blocks (1) after splicing are connected through the inner shaft core (5) and the outer shaft core (6). The inner shaft core (5) and the inner side of the protective block (1) close to the tunnel are both provided with a buffer for containing the air pressure after blasting. The protective block (1) is provided with a driving member for discharging the air inside the tunnel to the outside. The driving member is located on the buffer member in the protective block (1). A sound insulation layer (17) is provided inside the protective block (1).

2. A tunnel blasting sound insulation protection device according to claim 1, characterized in that: An inner retaining ring (2) is provided on the inner side of the outer ring of the protection block (1), and an outer retaining ring (3) is provided on the outer side of the outer ring of the protection block (1). The inner retaining ring (2) and the outer retaining ring (3) form a groove that is connected to the tunnel entrance. The protection block (1) is fixedly connected to the tunnel by bolts penetrating the inner retaining ring (2) and the outer retaining ring (3).

3. The tunnel blasting sound insulation protection device according to claim 1 is characterized by: The inner ring of the protective block (1) is provided with an arc groove (4), and a plurality of the arc grooves (4) are spliced ​​to form a through hole for inserting an inner shaft core (5), the inner shaft core (5) is threadedly connected to the outer shaft core (6), and the ends of the inner shaft core (5) and the outer shaft core (6) are provided with baffles for clamping the inner and outer ends of the protective block (1) by means of a screw.

4. The tunnel blasting sound insulation protection device according to claim 1 is characterized by: The buffer member on the inner shaft core (5) comprises a central buffer plate (7) sliding in the inner shaft core (5) and (8) arranged between the central buffer plate (7) and the inner shaft core (5), and the outer shaft core (6) is provided with an exhaust hole (9) for exhausting the inner shaft core (5).

5. The tunnel blasting sound insulation protection device according to claim 1 is characterized by: The buffer member on the protection block (1) comprises an arc-shaped buffer plate (10) slidably arranged on a side of the protection block (1) close to the tunnel, and a buffer spring (12) arranged between the arc-shaped buffer plate (10) and the protection block (1).

6. The tunnel blasting sound insulation protection device according to claim 5 is characterized by: The driving member comprises an exhaust pipe (11) fixed on an arc-shaped buffer plate (10) and an exhaust fan (13) fixed inside the exhaust pipe (11); a sound absorbing net (14) is provided inside the exhaust pipe (11) on a side close to the outside of the tunnel; a filter plate (15) is also provided on a side close to the outside of the tunnel; one end of the exhaust pipe (11) away from the arc-shaped buffer plate (10) is spirally connected to a mounting cover (16), and the filter plate (15) is mounted in the mounting cover (16); and ventilation holes are provided on both the mounting cover (16) and the arc-shaped buffer plate (10).

Images