Sealing device for tunnel portal

Abstract

The invention belongs to the technical field of building construction, and discloses a tunnel portal sealing device which comprises a connecting sleeve, a sealing unit and a supporting assembly. And the connecting sleeve is sleeved on the pipeline. The sealing unit comprises a first sealing assembly and a second sealing assembly which are detachably connected to the two ends of the connecting sleeve. The first sealing assembly is installed on a tunnel portal, and sealing holes are formed in the first sealing assembly and the second sealing assembly. The sealing hole of the second sealing assembly is communicated with the tunnel portal through the connecting sleeve and the sealing hole of the first sealing assembly, and the pipeline penetrates through the sealing hole of the second sealing assembly, the connecting sleeve and the sealing hole of the first sealing assembly and extends into the tunnel portal. The inner walls of the sealing holes make close contact with the outer wall of the pipeline. The multiple supporting assemblies are arranged on the outer side of the connecting sleeve in the circumferential direction at intervals, and the two ends of each supporting assembly are rotationally connected with the first sealing assembly and the second sealing assembly correspondingly. The sealing device of the tunnel portal can always seal the gap between the tunnel portal and the pipeline.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, and particularly to a sealing device for a tunnel portal. Background Art

[0002] In tunnel construction, the pipe jacking method or the direct pipe laying method is often used for laying pipes. First, a hole with a diameter slightly larger than the outer diameter of the pipe is excavated at the construction position. After constructing the portal with a concrete structure at the hole, the tunnel is continuously excavated, and at the same time, multiple pipes are gradually laid in the tunnel in sequence. When laying the pipes, there is a certain gap between the inner wall of the hole and the outer surface of the pipe, so that groundwater, muddy water, sand, etc. in the soil gush out from the gap, resulting in difficult construction and polluting the working well, and even possibly causing surface collapse. Therefore, a sealing device needs to be provided at the tunnel portal to seal the gap between the inner wall of the hole and the outer surface of the pipe to prevent safety accidents caused by the gushing of muddy water.

[0003] In the prior art, a rubber sealing ring is usually provided at the portal. The outer wall of the pipe is in close contact with the inner wall of the rubber sealing ring, so as to seal the gap between the inner wall of the hole and the outer surface of the pipe. However, as the tunnel is continuously excavated and the pipes are gradually laid in the tunnel, during the actual pipe laying process, it is difficult for the pipes to be laid in a fixed direction with high precision. At this time, the relative angle between the pipes and the rubber sealing ring changes, which may lead to local sealing failure, posing a risk of water and sand gushing, threatening the safety of construction personnel and equipment, easily causing disasters such as tunnel collapse and ground settlement, and at the same time may damage the structural stability. Summary of the Invention

[0004] The purpose of the present invention is to provide a sealing device for a tunnel portal, which can always seal the gap between the inner wall of the tunnel portal and the outer wall of the pipe, prevent safety accidents caused by local sealing failure, ensure construction safety, and maintain the stability of the structure.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] Provide a sealing device for a tunnel portal, which is configured to be arranged on the portal of the tunnel portal. The portal is arranged circumferentially along the tunnel portal and includes:

[0007] A connecting sleeve, which is configured to be sleeved on the pipe;

[0008] Sealing unit, including a first sealing component and a second sealing component, the first sealing component and the second sealing component are respectively arranged at two ends of the connecting sleeve, and are both detachably connected to the connecting sleeve. The first sealing component is configured to be installed on the portal, and both the first sealing component and the second sealing component are provided with sealing holes. The sealing hole of the second sealing component is communicated with the tunnel entrance through the connecting sleeve and the sealing hole of the first sealing component. The pipeline sequentially penetrates through the sealing hole of the second sealing component, the connecting sleeve and the sealing hole of the first sealing component, and extends into the tunnel entrance. The inner wall of the sealing hole is in close contact with the outer wall of the pipeline;

[0009] Support components, there are multiple of them, and the multiple support components are arranged at intervals along the circumferential direction on the outer side of the connecting sleeve. One end of the support component is rotatably connected to the first sealing component, and the other end is rotatably connected to the second sealing component. The axial length of the support component along the pipeline is adjustable.

[0010] Optionally, both the first sealing component and the second sealing component include a sealing element and a connecting member. The connecting member includes a ring body and connecting bosses arranged at the end of the ring body. The connecting bosses are stacked with the sealing element. The ring body extends into the connecting sleeve, and a plurality of first connecting holes are arranged at intervals along the circumferential direction of the ring body;

[0011] The sealing device at the tunnel entrance further includes a plurality of first plug-in members and a plurality of connecting pads. The plurality of connecting pads are sequentially spliced end to end and are arranged in a ring around the connecting sleeve. The first plug-in member penetrates through the connecting pad and the connecting sleeve and is screwed into the first connecting hole. The plurality of first plug-in members correspond to the plurality of first connecting holes one by one.

[0012] Optionally, the sealing device at the tunnel entrance further includes a sealing ring, and the sealing ring is clamped between the connecting sleeve and the ring body.

[0013] Optionally, the sealing device at the tunnel entrance further includes a second plug-in member. The side of the sealing element of the first sealing component facing away from the connecting boss is stacked with the portal. The second plug-in member penetrates through the connecting boss and the sealing element of the first sealing component and is threadedly connected to the portal.

[0014] Optionally, the sealing device at the tunnel entrance further includes a third plug-in member and a guiding assembly. The guiding assembly includes a frame body and guiding wheels. The frame body is stacked on the side of the seal of the second sealing assembly facing away from the connecting boss. The connecting boss of the second sealing assembly is provided with a second connecting hole. The third plug-in member penetrates through the frame body and the seal and is screwed into the second connecting hole. The guiding wheels are arranged on the frame body and are in sliding contact with the pipeline.

[0015] Optionally, the sealing device at the tunnel entrance further includes a gasket. The gasket is clamped between the frame body and the seal, and the third plug-in member penetrates through the gasket.

[0016] Optionally, the sealing device at the tunnel entrance further includes at least one sealing airbag. The sealing airbag is arranged in the connecting sleeve and is circumferentially arranged around the pipeline.

[0017] Optionally, the sealing device at the tunnel entrance further includes an inflation mechanism, a pressure detection component and a control module. The inflation mechanism is communicated with the sealing airbag and is used for filling gas into the sealing airbag. The pressure detection component is arranged on the sealing airbag and is used for detecting the air pressure in the sealing airbag. Both the inflation mechanism and the pressure detection component are communicatively connected to the control module.

[0018] Optionally, the support assembly includes a first rod body, a second rod body, a housing and a buffer member. One end of the first rod body is rotatably connected to the first sealing assembly, and the other end is connected to the housing. The housing is provided with a buffer chamber. One end of the second rod body extends into the buffer chamber, and the other end is rotatably connected to the second sealing assembly. The buffer member is arranged in the buffer chamber, and one end of the buffer member is connected to the second rod body and the other end is connected to the housing.

[0019] Optionally, the buffer member includes a shock-absorbing spring.

[0020] Advantages of the present invention:

[0021] The present invention provides a sealing device for a tunnel opening, comprising a connecting sleeve, a sealing unit and a supporting assembly. When performing tunnel construction, firstly, a tunnel opening is excavated at a position to be constructed, and a tunnel door is constructed along the circumference of the tunnel opening, and then the sealing device for the tunnel opening is installed on the tunnel door, and the tunnel is continued to be excavated, and at the same time, the pipeline is continuously pushed into the tunnel, so as to complete the laying of the pipeline. When installing the sealing device for the tunnel opening, firstly, a first sealing assembly is installed on the tunnel door, and then one end of the connecting sleeve is connected to the side of the first sealing assembly away from the tunnel door, and the second sealing assembly is connected to the other end of the connecting sleeve, and at the same time, a plurality of supporting assemblies are rotatably connected between the first sealing assembly and the second sealing assembly. After the sealing device for the tunnel opening is installed, the tunnel excavation equipment is passed through the sealing device for the tunnel opening, so that the tunnel is continued to be excavated, and at the same time, the pipeline is pushed into the excavation direction, and the pipeline passes through the sealing hole of the second sealing assembly, the connecting sleeve, and the sealing hole of the first sealing assembly in sequence, and is pushed into the tunnel opening.

[0022] By setting the first sealing component and the second sealing component, and the inner wall of the sealing hole is in close contact with the outer wall of the pipeline, the sealing of the gap between the inner wall of the tunnel opening and the outer wall of the pipeline is achieved. At the same time, the first sealing component and the second sealing component are provided with a supporting component, and the supporting component is rotatably connected to the first sealing component and the second sealing component. When the pushed-in pipeline tilts downward or upward, the pipeline will drive the second sealing component to rotate and simultaneously drive the second sealing component to move along the axial direction of the pipeline, so that the inner wall of the sealing hole of the second sealing component is always in close contact with the outer wall of the pipeline, and then the gap between the inner wall of the tunnel opening and the outer wall of the pipeline can be always sealed, thereby preventing safety accidents caused by local sealing failure, ensuring construction safety, and maintaining structural stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of a sealing device for a tunnel opening provided by an embodiment of the present invention;

[0024] Figure 2 It is a cross-sectional view of a sealing device for a tunnel opening provided by an embodiment of the present invention.

[0025] In the figure:

[0026] 1. Connecting sleeve; 11. First connector; 12. Connecting pad;

[0027] 2. Sealing unit; 21. First sealing assembly; 211. Sealing member; 2111. Sealing hole; 212. Connecting member; 2121. Ring body; 2122. Connecting boss; 22. Second sealing assembly; 23. Second connector; 24. Third connector;

[0028] 3. Support assembly; 31. First rod body; 32. Second rod body; 33. Shell;

[0029] 4. Sealing ring

[0030] 5. Guide assembly; 51. Frame body; 52. Guide wheel

[0031] 6. Spacer ring

[0032] 7. Sealing airbag Detailed implementation manners

[0033] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only parts related to the present invention rather than all structures are shown in the drawings.

[0034] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0035] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0036] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0037] This embodiment provides a sealing device for a tunnel entrance, which is configured to be arranged on the portal of the tunnel entrance. The portal is arranged circumferentially along the tunnel entrance, such as Figure 1 andFigure 2 As shown, it can always seal the gap between the inner wall of the tunnel entrance and the outer wall of the pipeline, prevent safety accidents caused by local seal failure, ensure construction safety, and maintain the stability of the structure.

[0038] As Figure 1 and Figure 2 shown, the sealing device at the tunnel entrance includes a connecting sleeve 1, a sealing unit 2, and a support assembly 3. Among them, the connecting sleeve 1 is configured to be sleeved on the pipeline. The sealing unit 2 includes a first sealing assembly 21 and a second sealing assembly 22. The first sealing assembly 21 and the second sealing assembly 22 are respectively arranged at both ends of the connecting sleeve 1 and are both detachably connected to the connecting sleeve 1. The first sealing assembly 21 is configured to be installed on the portal. Sealing holes 2111 are provided in both the first sealing assembly 21 and the second sealing assembly 22. The sealing hole 2111 of the second sealing assembly 22 communicates with the tunnel entrance through the connecting sleeve 1 and the sealing hole 2111 of the first sealing assembly 21. The pipeline sequentially passes through the sealing hole 2111 of the second sealing assembly 22, the connecting sleeve 1, and the sealing hole 2111 of the first sealing assembly 21 and extends into the tunnel entrance. The inner wall of the sealing hole 2111 is in close contact with the outer wall of the pipeline. A plurality of support assemblies 3 are provided, and the plurality of support assemblies 3 are arranged at intervals along the circumferential direction on the outer side of the connecting sleeve 1. One end of the support assembly 3 is rotatably connected to the first sealing assembly 21, and the other end is rotatably connected to the second sealing assembly 22. The axial length of the support assembly 3 along the pipeline is adjustable.

[0039] During tunnel construction, first, the tunnel entrance is excavated at the construction position to be constructed, and the portal is constructed circumferentially at the tunnel entrance. Then, the sealing device at the tunnel entrance is installed on the portal. The tunnel is continuously excavated while the pipeline is continuously jacked into the tunnel, thereby completing the pipeline laying work. When installing the sealing device at the tunnel entrance, first, the first sealing assembly 21 is installed on the portal. Then, one end of the connecting sleeve 1 is connected to the side of the first sealing assembly 21 away from the portal, and the second sealing assembly 22 is connected to the other end of the connecting sleeve 1. At the same time, a plurality of support assemblies 3 are rotatably connected between the first sealing assembly 21 and the second sealing assembly 22. After the sealing device at the tunnel entrance is installed, the tunnel excavation equipment passes through the sealing device at the tunnel entrance, continues to excavate the tunnel, and at the same time jacks the pipeline along the excavation direction. The pipeline will sequentially pass through the sealing hole 2111 of the second sealing assembly 22, the connecting sleeve 1, and the sealing hole 2111 of the first sealing assembly 21 and be jacked into the tunnel entrance.

[0040] By setting the first sealing assembly 21 and the second sealing assembly 22, and making the inner wall of the sealing hole 2111 in close contact with the outer wall of the pipeline, the sealing of the gap between the inner wall of the tunnel entrance and the outer wall of the pipeline is achieved. At the same time, a support assembly 3 is provided on the first sealing assembly 21 and the second sealing assembly 22, and the support assembly 3 is rotatably connected to both the first sealing assembly 21 and the second sealing assembly 22. When the inserted pipeline tilts downward or upward, the pipeline will drive the second sealing assembly 22 to rotate and at the same time drive the second sealing assembly 22 to move axially along the pipeline, so that the inner wall of the sealing hole 2111 of the second sealing assembly 22 is always in close contact with the outer wall of the pipeline, thereby always sealing the gap between the inner wall of the tunnel entrance and the outer wall of the pipeline, preventing safety accidents caused by local sealing failure, ensuring construction safety, and maintaining the stability of the structure.

[0041] Exemplarily, 8 support assemblies 3 are provided. In other embodiments, other numbers of support assemblies 3 can also be set according to actual needs, which are not limited herein.

[0042] It should be noted that the pipeline is a steel pipe, and the material of the connecting sleeve 1 is a flexible material such as rubber. The sealing device for the tunnel entrance proposed in this embodiment is applicable to laying pipelines by the direct pipe laying method or the pipe jacking construction method. When laying the pipeline in the tunnel, a vertical support is provided at the end of the pipeline that has not entered the tunnel to prevent the pipeline from squeezing the sealing device, and setting the vertical support is beneficial to ensuring that the pipeline enters the tunnel in the horizontal direction.

[0043] Optionally, as Figure 1 and Figure 2 shown, both the first sealing assembly 21 and the second sealing assembly 22 include a seal 211 and a connecting member 212. The connecting member 212 includes a ring body 2121 and a connecting boss 2122 provided at the end of the ring body 2121, and the connecting boss 2122 is stacked with the seal 211. The ring body 2121 extends into the connecting sleeve 1, and a plurality of first connection holes are circumferentially spaced apart on the ring body 2121. The sealing device for the tunnel entrance further includes a plurality of first plug connectors 11 and a plurality of connecting pads 12. The plurality of connecting pads 12 are spliced end to end in sequence and are arranged around the connecting sleeve 1. The first plug connector 11 penetrates through the connecting pad 12 and the connecting sleeve 1 and is screwed into the first connection hole. The plurality of first plug connectors 11 correspond to the plurality of first connection holes one by one. When connecting the first sealing assembly 21 and the connecting sleeve 1, or connecting the second sealing assembly 22 and the connecting sleeve 1, the connecting sleeve 1 is sleeved outside the ring body 2121, that is, the ring body 2121 extends into the connecting sleeve 1, and then the plurality of connecting pads 12 are sequentially arranged around the connecting sleeve 1 and spliced end to end in sequence. Finally, only the first plug connector 11 needs to penetrate through the connecting pad 12 and the connecting sleeve 1 and be screwed into the first connection hole of the ring body 2121. The structural form is simple and the operation is convenient.

[0044] In this embodiment, 12 connecting pads 12 are provided, and 2 first plug-in members 11 are provided on each connecting pad 12. The number of first connection holes is the same as the number of first plug-in members 11. In other embodiments, according to actual needs, other numbers of connecting pads 12 can also be provided, and 1 or more than 2 first plug-in members 11 can be provided on each connecting pad 12, which is not limited herein.

[0045] Exemplarily, the first plug-in member 11 includes a bolt.

[0046] Optionally, as Figure 1 and Figure 2 shown, the sealing device at the tunnel entrance also includes a sealing ring 4. The sealing ring 4 is clamped between the connecting sleeve 1 and the ring body 2121. By providing the sealing ring 4, the sealing performance between the connecting sleeve 1 and the sealing assembly can be further enhanced, so as to ensure the sealing effect between the inner wall of the tunnel entrance and the outer wall of the pipeline, prevent safety accidents caused by seal failure, ensure construction safety, and maintain the stability of the structure.

[0047] It should be noted that the sealing ring 4 includes a rubber sealing ring 4.

[0048] Optionally, as Figure 1 and Figure 2 shown, the sealing device at the tunnel entrance also includes a second plug-in member 23. The side of the seal 211 of the first sealing assembly 21 facing away from the connecting boss 2122 is stacked with the portal. The second plug-in member 23 penetrates through the connecting boss 2122 and the seal 211 of the first sealing assembly 21 and is threadedly connected to the portal. When installing the first sealing assembly 21, only need to stack the seal 211 and the connecting boss 2122 on the portal in sequence, and then penetrate the second plug-in member 23 through the connecting boss 2122 and the seal 211 of the first sealing assembly 21 and threadedly screw it onto the portal, the structural form is simple and the operation is convenient.

[0049] Exemplarily, the second plug-in member 23 includes a bolt.

[0050] Optionally, as Figure 1 and Figure 2As shown in the figure, the sealing device at the tunnel entrance further includes a third plug-in member 24 and a guiding assembly 5. The guiding assembly 5 includes a frame body 51 and guiding wheels 52. The frame body 51 is stacked on the side of the sealing member 211 of the second sealing assembly 22 that is away from the connecting boss 2122. A second connecting hole is provided in the connecting boss 2122 of the second sealing assembly 22. The third plug-in member 24 penetrates through the frame body 51 and the sealing member 211 and is screwed into the second connecting hole. The guiding wheels 52 are arranged on the frame body 51, and the guiding wheels 52 are in sliding contact with the pipeline. By means of the third plug-in member 24, the frame body 51 is arranged on the second sealing assembly 22. The structural form is simple, the operation is convenient, and it is convenient for disassembly and maintenance. By providing the guiding wheels 52, when the pipeline is pushed into the tunnel, on the one hand, the guiding wheels 52 are in sliding contact with the outer wall of the pipeline, and the guiding wheels 52 can provide a guiding and positioning function for the pipeline, reducing the inclination and displacement of the pipeline. On the other hand, the guiding wheels 52 can provide partial support for the pipeline.

[0051] It should be noted that multiple guiding assemblies 5 can be arranged circumferentially along the sealing member 211, so that the traveling wheels of the multiple guiding assemblies 5 are arranged around the outside of the pipeline. In this embodiment, 12 guiding assemblies 5 are provided, and each guiding assembly 5 is provided with 1 traveling wheel. In other embodiments, other numbers of guiding assemblies 5 can also be set according to actual needs, which are not limited here.

[0052] Exemplarily, the third plug-in member 24 includes a bolt.

[0053] Optionally, as Figure 1 and Figure 2 shown, the sealing device at the tunnel entrance further includes a gasket ring 6. The gasket ring 6 is clamped between the frame body 51 and the sealing member 211, and the third plug-in member 24 penetrates through the gasket ring 6. By providing the gasket ring 6, the local stress concentration at the connection of the third plug-in member 24 can be reduced, and the pre-tightening force can be more evenly distributed to the connected parts, which helps to reduce the risk of deformation and damage of the parts and improve the stability and reliability of the connection.

[0054] Optionally, as Figure 1 and Figure 2 shown, the sealing device at the tunnel entrance further includes at least one sealing airbag 7. The sealing airbag 7 is arranged in the connecting sleeve 1, and the sealing airbag 7 is arranged around the pipeline along the circumference. By arranging the sealing airbag 7 around the pipeline, on the one hand, the sealing airbag 7 can provide a supporting force for the pipeline, reducing the extrusion deformation of the self-weight of the pipeline on the first sealing assembly 21 and the second sealing assembly 22, and improving the tightness of the contact between the inner wall of the sealing hole 2111 and the outer wall of the pipeline. On the other hand, the sealing airbag 7 can wrap the outer wall of the pipeline, thereby further improving the sealing performance between the inner wall of the tunnel entrance and the outer wall of the pipeline and preventing sealing failure.

[0055] In this embodiment, two sealing air bags 7 are provided. In other embodiments, other numbers of sealing air bags 7 can also be set according to actual needs, which are not limited here.

[0056] The sealing device at the tunnel entrance further includes an inflation mechanism, a pressure detection component, and a control module. The inflation mechanism is communicated with the sealing air bag 7 and is used for filling gas into the sealing air bag 7. The pressure detection component is arranged on the sealing air bag 7 and is used for detecting the air pressure inside the sealing air bag 7. Both the inflation mechanism and the pressure detection component are communicatively connected to the control module. When the pipeline is jacked into the tunnel entrance, the control module controls the inflation mechanism to inflate the sealing air bag 7, so that the sealing air bag 7 wraps around the pipeline until the pressure detection component detects that the air pressure inside the sealing air bag 7 is stable. As the pipeline is continuously jacked into the tunnel entrance, the pipeline will squeeze the sealing air bag 7. When the pressure detection component detects that the air pressure inside the sealing air bag 7 decreases, it sends a signal to the control module, and again the control module controls the inflation mechanism to inflate the sealing air bag 7, so that the air pressure inside the sealing air bag 7 is kept stable, so that the sealing air bag 7 always provides a supporting and sealing effect for the pipeline. Through the adjustment of the air pressure, the pose of the pipeline can be adaptively adjusted and corrected to ensure the smooth progress of the pipeline laying work.

[0057] Exemplarily, the control module includes a PLC.

[0058] Optionally, as Figure 1 and Figure 2 shown, the support assembly 3 includes a first rod body 31, a second rod body 32, a housing 33, and a buffer member. One end of the first rod body 31 is rotatably connected to the first sealing assembly 21, and the other end is connected to the housing 33. The housing 33 is provided with a buffer chamber. One end of the second rod body 32 extends into the buffer chamber, and the other end is rotatably connected to the second sealing assembly 22. The buffer member is arranged in the buffer chamber, and one end of the buffer member is connected to the second rod body 32, and the other end is connected to the housing 33. When the front end of the pipeline (i.e., the end of the pipeline entering the tunnel) is inclined downward, the tail end of the pipeline will be lifted vertically and separated from the vertical support. At the same time, the pipeline will drive the second sealing assembly 22 to rotate upward. At this time, the pipeline will squeeze the support assembly 3 located below the pipeline, thereby pushing the second rod body 32 of this part of the support assembly 3 into the buffer chamber, so that the second rod body 32 squeezes the buffer member, and the buffer member provides a reverse pushing force for the second rod body 32 to support the second rod body 32; the support assembly 3 located above the pipeline will be stretched, so that part of the second rod body 32 of this part of the support assembly 3 is pulled out of the buffer chamber, so that the second rod body 32 stretches the buffer member, and the buffer member will provide a reverse pulling force for the second rod body 32. The two parts of the support assembly 3 cooperate to provide a supporting force for the pipeline. By providing the buffer member, the impact force of the second rod body 32 on the housing 33 can be reduced.

[0059] Exemplarily, the buffer includes a shock-absorbing spring. In other embodiments, according to actual needs, structures such as a damping shock absorber can also be selected as the buffer, which is not limited here.

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A sealing device for a tunnel entrance, configured to be arranged on the portal of the tunnel entrance, the portal being arranged circumferentially along the tunnel entrance, characterized in that Comprising: A connecting sleeve (1), configured to be sleeved on a pipeline; A sealing unit (2), including a first sealing component (21) and a second sealing component (22). The first sealing component (21) and the second sealing component (22) are respectively arranged at two ends of the connecting sleeve (1), and are both detachably connected to the connecting sleeve (1). The first sealing component (21) is configured to be installed on the portal. The first sealing component (21) and the second sealing component (22) are both provided with sealing holes (2111). The sealing hole (2111) of the second sealing component (22) communicates with the tunnel portal through the connecting sleeve (1) and the sealing hole (2111) of the first sealing component (21). The pipeline sequentially penetrates through the sealing hole (2111) of the second sealing component (22), the connecting sleeve (1), and the sealing hole (2111) of the first sealing component (21), and extends into the tunnel portal. The inner wall of the sealing hole (2111) is in close contact with the outer wall of the pipeline; Support components (3), there are multiple of them. The multiple support components (3) are circumferentially arranged at intervals on the outer side of the connecting sleeve (1). One end of the support component (3) is rotatably connected to the first sealing component (21), and the other end is rotatably connected to the second sealing component (22). The length of the support component (3) along the axial direction of the pipeline is adjustable.

2. The sealing device for the tunnel entrance according to claim 1, characterized in that, Both the first sealing component (21) and the second sealing component (22) include a sealing member (211) and a connecting member (212). The connecting member (212) includes a ring body (2121) and a connecting boss (2122) provided at the end of the ring body (2121). The connecting boss (2122) is stacked with the sealing member (211). The ring body (2121) extends into the connecting sleeve (1), and a plurality of first connection holes are circumferentially arranged at intervals on the ring body (2121); The sealing device for the tunnel portal further includes a plurality of first plug-in members (11) and a plurality of connecting pads (12). The plurality of connecting pads (12) are sequentially spliced end to end and are arranged around the connecting sleeve (1). The first plug-in member (11) penetrates through the connecting pad (12) and the connecting sleeve (1), and is screwed into the first connection hole. The plurality of first plug-in members (11) correspond to the plurality of first connection holes one by one.

3. The sealing device for the tunnel entrance according to claim 2, characterized in that, The sealing device for the tunnel portal further includes a sealing ring (4), and the sealing ring (4) is clamped between the connecting sleeve (1) and the ring body (2121).

4. The sealing device for the tunnel entrance according to claim 2, characterized in that, The sealing device for the tunnel portal further includes a second plug-in member (23). The side of the sealing member (211) of the first sealing component (21) facing away from the connecting boss (2122) is stacked with the portal. The second plug-in member (23) penetrates through the connecting boss (2122) and the sealing member (211) of the first sealing component (21), and is threadedly connected to the portal.

5. The sealing device for the tunnel entrance according to claim 2, characterized in that The sealing device for the tunnel opening further comprises a third plug-in component (24) and a guide assembly (5); the guide assembly (5) comprises a frame (51) and a guide wheel (52); the frame (51) is stacked on a side of the sealing component (211) of the second sealing component (22) away from the connecting boss (2122); the connecting boss (2122) of the second sealing component (22) is provided with a second connecting hole; the third plug-in component (24) passes through the frame (51) and the sealing component (211) and is screwed into the second connecting hole; the guide wheel (52) is arranged on the frame (51), and the guide wheel (52) is in sliding contact with the pipeline.

6. The sealing device for the tunnel entrance according to claim 5, characterized in that, The sealing device for the tunnel opening further comprises a gasket (6), wherein the gasket (6) is sandwiched between the frame (51) and the sealing member (211), and the third plug-in member (24) passes through the gasket (6).

7. The sealing device for the tunnel entrance according to any one of claims 1-6, characterized in that, The sealing device for the tunnel opening further comprises at least one sealing airbag (7), wherein the sealing airbag (7) is arranged in the connecting sleeve (1), and the sealing airbag (7) is circumferentially arranged on the pipeline.

8. The sealing device for the tunnel entrance according to claim 7, characterized in that, The sealing device for the tunnel opening further comprises an inflation mechanism, an air pressure detection component and a control module; the inflation mechanism is in communication with the sealing airbag (7) and is used to fill the sealing airbag (7) with gas; the air pressure detection component is arranged on the sealing airbag (7) and is used to detect the air pressure in the sealing airbag (7); the inflation mechanism and the air pressure detection component are both in communication connection with the control module.

9. The sealing device for the tunnel entrance according to any one of claims 1-6, characterized in that, The support assembly (3) comprises a first rod body (31), a second rod body (32), a shell (33) and a buffer member, wherein one end of the first rod body (31) is rotatably connected to the first sealing assembly (21), and the other end is connected to the shell (33), the shell (33) is provided with a buffer chamber, one end of the second rod body (32) extends into the buffer chamber, and the other end is rotatably connected to the second sealing assembly (22), the buffer member is provided in the buffer chamber, and one end of the buffer member is connected to the second rod body (32), and the other end is connected to the shell (33).

10. The sealing device for a tunnel entrance according to claim 9, characterized in that, The buffer member includes a shock absorbing spring.

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