Hydraulic tunnel inlet plugging device

Abstract

The invention discloses a hydraulic tunnel entrance plugging device, belongs to the technical field of hydraulic engineering, and aims to solve the problems that the plugging force of the plugging device is not changed, the plugging device has the risk of breaking away from a tunnel due to plugging failure when water pressure is increased, and water seepage is easily caused due to unstable plugging of the plugging device when the water pressure is changed; the tunnel plugging device comprises a first base plate and a second base plate, a check ring is fixedly connected to the outer side wall of the first base plate, and a plurality of reinforcing assemblies are slidably arranged on the inner ring side wall of the check ring in a penetrating mode. By arranging the reinforcing assembly, the abutting degree of the plugging device and the inner wall of the hydraulic tunnel is adjusted, leakage is prevented when the water pressure is increased by arranging the pressure assembly, and the adjusting framework is adjusted in the radial direction and the axial direction by arranging the first adjusting assembly and the second adjusting assembly; the plugging device can be switched between a bottle plug type structure and a uniform-section columnar structure.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic engineering, and specifically to a plugging device for the inlet of a hydraulic tunnel. Background Technique

[0002] A hydraulic tunnel is a water passage dug in a mountain or underground, which can be used for irrigation, power generation, water supply, water discharge, water conveyance, construction diversion, and navigation. In the construction of water conservancy and hydropower projects, for hydraulic tunnels that will be abandoned or rebuilt, they generally need to be plugged by a plugging device, and the plugging device and the surrounding rock or concrete jointly bear the water pressure.

[0003] For example, the patent with the publication number CN114808852B: An inlet plugging device for tunnel maintenance, including a hollow wedge-shaped plugging body. The hollow wedge-shaped plugging body is a wedge-shaped body with a cross-section gradually changing from the tail to the head into a smaller and smaller ring. After the maintenance is completed, the entire plugging device is pulled out through a towing rope. The first advantage of this invention is that it provides a dry construction site for the maintenance and reinforcement of the blind section of the tunnel and the first gate in the reservoir area. The second is that it uses the plugging body device to plug the tunnel inlet, which is safe and reliable, simple in construction, reusable, has good economic benefits, and has little impact on the reservoir.

[0004] Another example is the patent with the publication number CN116289818A: A tunnel plugging device with valve adjustment and its use method, including an annular sealing airbag with multiple protrusions on the outer surface and an airbag inflatable tube. An auxiliary water plugging mechanism and a support mechanism are respectively assembled inside the annular sealing airbag from the water inlet end to the water outlet end, enabling the tunnel to still have a flow-through condition under the condition of plugging. The plugging mechanism of this invention consists of a corrugated variable-diameter elastic airbag, a sealing end cover, a steel wire sealing ring, and an annular spring tensioning ring, which can effectively reduce the shear force of the annular sealing airbag and improve the thickness and overall plugging quality of the annular sealing airbag.

[0005] However, there are still some deficiencies in the current plugging devices for the inlet of hydraulic tunnels during use. For example, during the use of the plugging device, the water pressure in the tunnel often changes, while the plugging force of the plugging device is usually constant. When the water pressure increases, there is a risk that the plugging device fails to plug and detaches from the tunnel; and when the water pressure changes, the plugging of the plugging device is unstable, easily leading to water seepage problems; for medium and high-head hydraulic tunnels, the plugging device generally selects a cork-type plugging body with a high overload capacity, while for low-head tunnels, an equal-section columnar plugging body is generally selected. When making a temporary emergency plugging of the tunnel, the existing plugging devices cannot switch the shape for temporary use, easily resulting in the tunnel not being plugged in time.

[0006] In view of the above problems, a plugging device for the inlet of a hydraulic tunnel is proposed. Summary of the Invention

[0007] The object of the present invention is to provide a plugging device for the inlet of a hydraulic tunnel. By using this device for operation, the problems in the above background are solved. That is, the plugging force of the plugging device is usually constant. When the water pressure increases, there is a risk that the plugging device fails to plug and detaches from the tunnel. And when the water pressure changes, the plugging of the plugging device is unstable and prone to water seepage. At the same time, when the tunnel needs to be temporarily and emergently plugged, the existing plugging device cannot switch its shape for temporary use, which easily leads to the tunnel not being plugged in time.

[0008] To achieve the above object, the present invention provides the following technical solution: A plugging device for the inlet of a hydraulic tunnel, including a first substrate and a second substrate. The first substrate is in a frustum shape, and the first substrate and the second substrate are fixedly connected by a plurality of connecting rods. One end of the first substrate is provided with an end cover. A retaining ring is fixedly connected to the outer side wall of the first substrate. A plurality of reinforcing components are slidably arranged through the inner side wall of the inner ring of the retaining ring. A pressure component is fixedly installed on the outer side wall of the outer ring of the retaining ring. A first adjusting component is rotatably connected between the side walls of the first substrate and the second substrate. A second adjusting component is installed on the inner side wall of the inner ring of the retaining ring. One end of the second adjusting component is fixedly connected to a plurality of adjusting skeletons. The plurality of adjusting skeletons are arranged in a circumferential array. One end of each adjusting skeleton away from the second adjusting component is rotatably connected to the side wall of the moving end of the first adjusting component. A first airbag is fixedly connected to the outer side walls of the plurality of adjusting skeletons.

[0009] Further, a circular groove is opened at one end of the first substrate, and an installation hole is opened at the center of the inner wall of the circular groove.

[0010] Further, a first annular groove is opened on the inner side wall of the inner ring of the retaining ring, a second annular groove is opened on the outer side wall of the outer ring of the retaining ring, and a partition is fixedly connected to the inner side wall of the inner cavity of the second annular groove.

[0011] Further, each reinforcing component includes a slide bar slidably connected through the inner side wall of the inner cavity of the first annular groove. One end of each slide bar extends into the second annular groove. One end of each slide bar located inside the second annular groove is fixedly connected to a reinforcing plate. Anti-slip lines are provided on the side wall of the reinforcing plate. One end of each slide bar located inside the first annular groove is fixedly connected to a resisting plate. A spring is elastically connected between the side wall of each resisting plate and the inner side wall of the inner cavity of the first annular groove, and the corresponding slide bar penetrates through the inner ring of the spring.

[0012] Further, the pressure assembly includes a second airbag fixedly connected to the inner cavity side wall of the second annular groove. A plurality of plungers are fixedly connected to the outer wall of one side of the second airbag. One end of the plunger is communicated with the inside of the second airbag. The movable end of the plunger penetrates through one side wall of the retaining ring and is fixedly connected with a pressure plate. A connecting pipe is fixedly connected to the outer wall of the other side of the second airbag. The connecting pipe penetrates through the other side wall of the retaining ring and is communicated with the inside of the first airbag.

[0013] Further, the first adjustment assembly includes an adjustment handle disposed inside the circular groove. The rotating shaft of the adjustment handle is rotatably connected inside the mounting hole. One end of the rotating shaft of the adjustment handle is fixedly connected with a threaded rod. The end of the threaded rod away from the adjustment handle is rotatably connected to the side wall of the second substrate. An axial adjustment disc is threadedly connected to the outer wall of the threaded rod. A plurality of the connecting rods penetrate through the axial adjustment disc. A plurality of linkage rods are fixedly connected to the side wall of the rotating shaft of the adjustment handle.

[0014] Further, a plurality of inner embedding grooves are formed in the side wall of the axial adjustment disc corresponding to the positions of a plurality of adjustment skeletons. A groove is formed in the inner cavity side wall of each inner embedding groove. A movable rod is slidably connected inside each groove. One end of each movable rod is fixedly connected with a first connecting seat. One end of each adjustment skeleton is rotatably connected to the side wall of the corresponding first connecting seat.

[0015] Further, the second adjustment assembly includes a radial adjustment disc rotatably connected to the inner ring side wall of the retaining ring. The radial adjustment disc is of an annular structure. One end of a plurality of the linkage rods is fixedly connected to the inner ring side wall of the radial adjustment disc. A plurality of arc-shaped holes are formed in the side wall of the radial adjustment disc. The plurality of arc-shaped holes are arranged in a circumferential array.

[0016] Further, the second adjustment assembly further includes a plurality of guiding blocks fixedly connected to the inner ring side wall of the retaining ring. The plurality of guiding blocks are arranged in a circumferential array. A guiding hole is formed in the side wall of each guiding block. The arc-shaped holes and the guiding holes are arranged in one-to-one correspondence. A resisting rod is slidably arranged inside the arc-shaped hole and the guiding hole at the same position.

[0017] Further, each adjustment skeleton includes a second connecting seat fixedly connected to one end of the resisting rod. A first rotating rod is rotatably connected to each second connecting seat. One end of each first rotating rod away from the second connecting seat is rotatably connected to a second rotating rod. One end of each second rotating rod is rotatably connected to the side wall of the corresponding first connecting seat.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] By setting the reinforcement components, when the pressure inside the hydraulic tunnel changes, the pressure on the bottom plate changes accordingly, and the degree of compression of its compression spring is different, so that the distance that the sliding rod drives the reinforcement plate to protrude is different, and the tightness between the plugging device and the inner wall of the hydraulic tunnel can be adjusted adaptively, avoiding the plugging device from failing to plug and detaching from the tunnel; by setting the pressure components, when the water pressure increases, the sealing degree between the first airbag and the second airbag and the inner wall of the hydraulic tunnel is enhanced, preventing leakage; by setting the first adjustment component and the second adjustment component, the adjustment skeleton is adjusted radially and axially, so that the plugging device can be transformed between a cork-type structure and an equal-section columnar structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a schematic diagram of the overall structure of the present invention after removing the first airbag;

[0022] Figure 3 is a schematic cross-sectional structure diagram of the first substrate and the retaining ring part of the present invention;

[0023] Figure 4 is of the present invention Figure 3 is an enlarged schematic diagram of the structure of part A;

[0024] Figure 5 is a schematic diagram of the structure of the reinforcement component part of the present invention;

[0025] Figure 6 is a schematic diagram of the structure of the pressure component part of the present invention;

[0026] Figure 7 is a schematic diagram of the structure of one perspective of the first adjustment component of the present invention;

[0027] Figure 8 is a schematic diagram of the structure of another perspective of the first adjustment component of the present invention;

[0028] Figure 9 is a schematic diagram of the structure of the second adjustment component part of the present invention;

[0029] Figure 10 is a schematic diagram of the structure of the adjustment skeleton part of the present invention;

[0030] Figure 11 is a schematic cross-sectional view of the axial adjustment disk part of the present invention.

[0031] In the figure: 1. First substrate; 11. Circular groove; 12. Mounting hole; 2. Second substrate; 3. Connecting rod; 4. End cap; 5. Retaining ring; 51. First annular groove; 52. Second annular groove; 53. Partition board; 6. Reinforcement assembly; 61. Slide bar; 62. Reinforcement plate; 621. Anti-slip pattern; 63. Contact plate; 64. Spring; 7. Pressure assembly; 71. Second airbag; 72. Plunger; 73. Pressure plate; 74. Connecting pipe; 8. First adjustment assembly; 81. Adjustment handle; 82. Threaded rod; 83. Axial adjustment disc; 831. Embedded groove; 832. Groove; 833. Movable rod; 834. First connection seat; 84. Linking rod; 9. Second adjustment assembly; 91. Radial adjustment disc; 911. Arc-shaped hole; 92. Guide block; 921. Guide hole; 93. Contact rod; 10. Adjustment frame; 101. Second connection seat; 102. First rotating rod; 103. Second rotating rod; 20. First airbag. Detailed implementation manners

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] In order to solve the technical problem that during the use of the plugging device, the water pressure in the tunnel often changes, while the plugging force of the plugging device is usually constant, and when the water pressure increases, there is a risk that the plugging device fails to plug and detaches from the tunnel, as Figure 1 - Figure 5 shown, the following preferred technical solutions are provided:

[0034] A hydraulic tunnel inlet plugging device, comprising a first substrate 1 and a second substrate 2. The first substrate 1 is in the shape of a frustum of a cone, and the first substrate 1 and the second substrate 2 are fixedly connected by a plurality of connecting rods 3. One end of the first substrate 1 is provided with an end cover 4, and a retaining ring 5 is fixedly connected to the outer side wall of the first substrate 1. When plugging the hydraulic tunnel, the outer wall of the retaining ring 5 is in close contact with the inner wall of the hydraulic tunnel. A plurality of reinforcing components 6 are slidably arranged through the inner side wall of the inner ring of the retaining ring 5. The reinforcing components 6 are used to adaptively adjust the pressing degree between the plugging device and the inner wall of the hydraulic tunnel when the water pressure at the inlet of the hydraulic tunnel changes, and play a role in strengthening the plugging device when the water pressure increases, to prevent it from moving and causing the plugging to fail and break away from the tunnel. A pressure component 7 is fixedly installed on the outer side wall of the outer ring of the retaining ring 5. The pressure component 7 is used to prevent leakage when the water pressure increases. A first adjusting component 8 is rotatably connected between the side walls of the first substrate 1 and the second substrate 2. A second adjusting component 9 is installed on the inner side wall of the inner ring of the retaining ring 5. One end of the second adjusting component 9 is fixedly connected to a plurality of adjusting skeletons 10. The plurality of adjusting skeletons 10 are arranged in a circumferential array. One end of each adjusting skeleton 10 away from the second adjusting component 9 is rotatably connected to the side wall of the moving end of the first adjusting component 8. The first adjusting component 8 is used to drive the adjusting skeleton 10 to switch its shape along the axial direction, and the second adjusting component 9 is used to drive the adjusting skeleton 10 to switch its shape along the radial direction. A first airbag 20 is fixedly connected to the outer side walls of the plurality of adjusting skeletons 10. The first airbag 20 is pre-pressurized by filling it with gas, which can play a certain buffering role for the confining pressure of the hydraulic tunnel, and the first airbag 20 can change with the change of the shape of the adjusting skeleton 10.

[0035] When the plugging device is in use, the first substrate 1 and the end where the retaining ring 5 is located bear the water pressure. Under the guiding action of the curved surface of the frustum-shaped first substrate 1, the change in the water pressure at the inlet of the hydraulic tunnel being plugged will cause the radial pressure received by the reinforcing component 6 to change, so as to be able to adaptively adjust the pressing degree between the plugging device and the inner wall of the hydraulic tunnel. At the same time, the change in the water pressure at the inlet of the hydraulic tunnel will cause the axial pressure received by one end of the pressure component 7 to change, so as to be able to enhance the sealing effect between the other end of the pressure component 7 and a part of the first airbag 20 and the inner wall of the hydraulic tunnel when the water pressure becomes larger, so as to achieve the purpose of preventing leakage.

[0036] For hydraulic tunnels with medium and high water heads, the plugging device generally selects a cork-type plugging body, which has a high overload capacity. For low-head tunnels, an equal-section columnar plugging body is generally selected. When temporarily and emergently plugging the tunnel, the first adjusting component 8 is used to drive the adjusting skeleton 10 to switch its shape along the axial direction, and the second adjusting component 9 is used to drive the adjusting skeleton 10 to switch its shape along the radial direction, so that the plugging device can be transformed between a cork-type structure and an equal-section columnar structure, so as to be able to temporarily plug the hydraulic tunnel in time in case of emergency.

[0037] A first annular groove 51 is formed on the inner circumferential side wall of the retaining ring 5, and a second annular groove 52 is formed on the outer circumferential side wall of the retaining ring 5. The width of the first annular groove 51 is smaller than that of the second annular groove 52. Enough space is reserved on the inner circumferential side wall of the retaining ring 5 for installing the second adjusting assembly 9. A partition plate 53 is fixedly connected to the inner cavity side wall of the second annular groove 52. The second annular groove 52 is divided into two parts by the partition plate 53. One end of the reinforcing assembly 6 extends into the second annular groove 52 and is located on one side of the partition plate 53, and it is arranged in a dislocation manner with the pressure assembly 7. The movements of the reinforcing assembly 6 and the pressure assembly 7 do not interfere with each other.

[0038] Each reinforcing assembly 6 includes a sliding rod 61 that is slidably connected through the inner cavity side wall of the first annular groove 51. One end of each sliding rod 61 extends into the second annular groove 52. A reinforcing plate 62 is fixedly connected to one end of each sliding rod 61 located inside the second annular groove 52. Anti-slip lines 621 are provided on the side wall of the reinforcing plate 62. A retaining plate 63 is fixedly connected to one end of each sliding rod 61 located inside the first annular groove 51. The side wall of each retaining plate 63 and the inner cavity side wall of the first annular groove 51 are elastically connected by a spring 64, and the corresponding sliding rod 61 penetrates through the inner ring of the spring 64.

[0039] Specifically, one end where the first substrate 1 and the retaining ring 5 are located bears water pressure. The reinforcing assembly 6 is arranged on the inner circumferential side wall of the retaining ring 5, and the moving directions of its sliding rod 61, reinforcing plate 62, and retaining plate 63 are radial. Under the guiding action of the curved surface of the frustum-shaped first substrate 1, water flows into the first annular groove 51 of the retaining ring 5. When the pressure inside the hydraulic tunnel changes, the pressure received by the retaining plate 63 changes accordingly, and the degree of compression of the spring 64 is different, so that the distance that the sliding rod 61 drives the reinforcing plate 62 to protrude is different, and the tightening degree between the plugging device and the inner wall of the hydraulic tunnel can be adjusted adaptively, avoiding the plugging device from failing to plug and detaching from the tunnel.

[0040] To solve the technical problem that when the water pressure changes, the plugging of the plugging device is unstable and prone to water seepage, as Figure 3 、 Figure 4 and Figure 6 shown, the following preferred technical solutions are provided:

[0041] The pressure assembly 7 includes a second airbag 71 fixedly connected to the inner cavity side wall of the second annular groove 52. A plurality of plungers 72 are fixedly connected to the outer wall on one side of the second airbag 71. One end of the plunger 72 communicates with the inside of the second airbag 71. The movable end of the plunger 72 penetrates through one side wall of the retaining ring 5 and is fixedly connected to a pressure plate 73. A connecting pipe 74 is fixedly connected to the outer wall on the other side of the second airbag 71. The connecting pipe 74 penetrates through the other side wall of the retaining ring 5 and communicates with the inside of the first airbag 20.

[0042] Specifically, the change in the water pressure at the inlet of the hydraulic tunnel causes a change in the axial pressure received by one end of the pressure assembly 7. The movable ends of multiple plungers 72 are retracted by the pressure plate 73, increasing the pressure at one end of the rodless cavity of the plungers 72. One end of the plunger 72 is internally connected to the second airbag 71, and the second airbag 71 is also internally connected to the first airbag 20 through the connecting pipe 74. The increase in water pressure enhances the sealing degree between the first airbag 20, the second airbag 71 and the inner wall of the hydraulic tunnel, thereby preventing leakage when the water pressure increases.

[0043] In order to solve the technical problem that when temporarily and emergently plugging a tunnel, the existing plugging device cannot switch its shape for temporary use, which easily leads to the tunnel not being plugged in time, as Figure 3 and Figure 7 - Figure 11 shown, the following preferred technical solutions are provided:

[0044] A circular groove 11 is opened at one end of the first substrate 1, and an end cover 4 is installed at one end of the circular groove 11 to close the circular groove 11, and an installation hole 12 is opened at the center of the inner wall of the circular groove 11.

[0045] The first adjustment assembly 8 includes an adjustment handle 81 arranged inside the circular groove 11. The rotating shaft of the adjustment handle 81 is rotatably connected inside the installation hole 12. One end of the rotating shaft of the adjustment handle 81 is fixedly connected to a threaded rod 82. The end of the threaded rod 82 away from the adjustment handle 81 is rotatably connected to the side wall of the second substrate 2. An axial adjustment disc 83 is threadedly connected to the outer wall of the threaded rod 82. A plurality of connecting rods 3 penetrate through the axial adjustment disc 83. The connecting rods 3 prevent the axial adjustment disc 83 from rotating by itself and play a guiding role for the axial adjustment disc 83. A plurality of linkage rods 84 are fixedly connected to the side wall of the rotating shaft of the adjustment handle 81.

[0046] A plurality of embedded grooves 831 are opened on the side wall of the axial adjustment disc 83 corresponding to the positions of a plurality of adjustment skeletons 10. A groove 832 is opened on the inner cavity side wall of each embedded groove 831. A movable rod 833 is slidably connected inside each groove 832. One end of each movable rod 833 is fixedly connected to a first connecting seat 834. One end of each adjustment skeleton 10 is rotatably connected to the side wall of the corresponding first connecting seat 834.

[0047] The second adjustment assembly 9 includes a radial adjustment disc 91 rotatably connected to the inner ring side wall of the retaining ring 5. The radial adjustment disc 91 is of an annular structure. One end of a plurality of linkage rods 84 is fixedly connected to the inner ring side wall of the radial adjustment disc 91, so that when the adjustment handle 81 drives the threaded rod 82 to rotate, the radial adjustment disc 91 can also be driven to rotate. A plurality of arc-shaped holes 911 are opened on the side wall of the radial adjustment disc 91, and the plurality of arc-shaped holes 911 are arranged in a circumferential array.

[0048] The second adjusting assembly 9 further includes a plurality of guiding blocks 92 fixedly connected to the inner side wall of the inner ring of the retaining ring 5. The plurality of guiding blocks 92 are arranged in a circumferential array. A guiding hole 921 is formed in the side wall of each guiding block 92. The arc-shaped holes 911 and the guiding holes 921 are arranged in one-to-one correspondence. A resisting rod 93 is slidably arranged inside the arc-shaped hole 911 and the guiding hole 921 at the same position. When the radial adjusting disc 91 rotates, the inner wall of the arc-shaped hole 911 abuts against the resisting rod 93, driving the resisting rod 93 to move along the guiding hole 921 towards the outer side of the radial adjusting disc 91.

[0049] Each adjusting framework 10 includes a second connecting seat 101 fixedly connected to one end of the resisting rod 93. A first rotating rod 102 is rotatably connected to each second connecting seat 101. A second rotating rod 103 is rotatably connected to one end of each first rotating rod 102 away from the second connecting seat 101. One end of each second rotating rod 103 is rotatably connected to the side wall of the corresponding first connecting seat 834.

[0050] Specifically, when the plugging device is changed from a bottle plug type structure to an equal cross-section columnar structure, by rotating the adjusting handle 81 to drive the threaded rod 82 to rotate, the axial adjusting disc 83 moves towards the direction of the second substrate 2 and straightens the first rotating rod 102 and the second rotating rod 103. During this process, the second rotating rod 103 rotates around the first rotating rod 102, and the first rotating rod 102 rotates around the second connecting seat 101. When the second rotating rod 103 rotates to be in a straight line with the first rotating rod 102, due to the blocking of the first rotating rod 102, the second rotating rod 103 will not continue to rotate. Due to the blocking of the second connecting seat 101, the first rotating rod 102 will not continue to rotate. When the adjusting handle 81 rotates, it will also drive the radial adjusting disc 91 to rotate. The inner wall of the arc-shaped hole 911 abuts against the resisting rod 93, driving the resisting rod 93 to move along the guiding hole 921 towards the outer side of the radial adjusting disc 91. At the same time, one end of the second rotating rod 103 drives the first connecting seat 834 and the movable rod 833 to move along the groove 832 towards the outer side of the axial adjusting disc 83. Through the combined action of the axial adjusting disc 83 and the radial adjusting disc 91, the adjusting framework 10 is changed from a bottle plug type structure to an equal cross-section columnar structure.

[0051] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0052] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic tunnel inlet plugging device, comprising a first substrate (1) and a second substrate (2). The first substrate (1) has a frustum-shaped structure, and the first substrate (1) and the second substrate (2) are fixedly connected by a plurality of connecting rods (3). It is characterized in that: One end of the first substrate (1) is provided with an end cap (4). A retaining ring (5) is fixedly connected to the outer side wall of the first substrate (1). A plurality of reinforcing components (6) are slidably arranged through the inner side wall of the inner ring of the retaining ring (5). A pressure component (7) is fixedly installed on the outer side wall of the outer ring of the retaining ring (5). A first adjusting component (8) is rotatably connected between the side walls of the first substrate (1) and the second substrate (2). A second adjusting component (9) is installed on the inner side wall of the inner ring of the retaining ring (5). One end of the second adjusting component (9) is fixedly connected with a plurality of adjusting skeletons (10). The plurality of adjusting skeletons (10) are arranged in a circumferential array. One end of each adjusting skeleton (10) away from the second adjusting component (9) is rotatably connected to the side wall of the moving end of the first adjusting component (8). A first airbag (20) is fixedly connected to the outer side walls of the plurality of adjusting skeletons (10).

2. The hydraulic tunnel inlet plugging device according to claim 1, characterized in that: A circular groove (11) is formed at one end of the first substrate (1), and a mounting hole (12) is formed at the center of the inner wall of the circular groove (11).

3. The hydraulic tunnel inlet plugging device according to claim 2, characterized in that: A first annular groove (51) is formed on the inner side wall of the inner ring of the retaining ring (5), and a second annular groove (52) is formed on the outer side wall of the outer ring of the retaining ring (5). A partition plate (53) is fixedly connected to the inner side wall of the inner cavity of the second annular groove (52).

4. The hydraulic tunnel inlet plugging device according to claim 3, characterized in that: Each of the reinforcing components (6) includes a slide bar (61) slidably connected through the inner side wall of the inner cavity of the first annular groove (51). One end of each slide bar (61) extends into the second annular groove (52). A reinforcing plate (62) is fixedly connected to one end of each slide bar (61) located inside the second annular groove (52). An anti-slip pattern (621) is provided on the side wall of the reinforcing plate (62). A retaining plate (63) is fixedly connected to one end of each slide bar (61) located inside the first annular groove (51). A spring (64) is elastically connected between the side wall of each retaining plate (63) and the inner side wall of the inner cavity of the first annular groove (51), and the corresponding slide bar (61) passes through the inner ring of the spring (64).

5. The hydraulic tunnel inlet plugging device according to claim 3, characterized in that: The pressure component (7) includes a second airbag (71) fixedly connected to the inner side wall of the inner cavity of the second annular groove (52). A plurality of plungers (72) are fixedly connected to the outer side wall of one side of the second airbag (71). One end of the plunger (72) is communicated with the inside of the second airbag (71). The movable end of the plunger (72) passes through one side wall of the retaining ring (5) and is fixedly connected with a pressure plate (73). A connecting pipe (74) is fixedly connected to the outer side wall of the other side of the second airbag (71). The connecting pipe (74) passes through the other side wall of the retaining ring (5) and is communicated with the inside of the first airbag (20).

6. The hydraulic tunnel inlet plugging device according to claim 5, characterized in that: The first adjustment assembly (8) includes an adjustment handle (81) disposed inside the circular groove (11). The rotating shaft of the adjustment handle (81) is rotatably connected inside the mounting hole (12). One end of the rotating shaft of the adjustment handle (81) is fixedly connected to a threaded rod (82). The end of the threaded rod (82) away from the adjustment handle (81) is rotatably connected to the side wall of the second substrate (2). An axial adjustment disc (83) is threadedly connected to the outer wall of the threaded rod (82). A plurality of the connecting rods (3) penetrate through the axial adjustment disc (83). A plurality of linkage rods (84) are fixedly connected to the side wall of the rotating shaft of the adjustment handle (81).

7. The hydraulic tunnel inlet plugging device according to claim 6, characterized in that: A plurality of embedded grooves (831) are formed in the side wall of the axial adjustment disc (83) corresponding to the positions of a plurality of adjustment skeletons (10). A groove (832) is formed in the side wall of the inner cavity of each of the embedded grooves (831). A movable rod (833) is slidably connected inside each of the grooves (832). One end of each of the movable rods (833) is fixedly connected to a first connecting seat (834). One end of each of the adjustment skeletons (10) is rotatably connected to the side wall of the corresponding first connecting seat (834).

8. A hydraulic tunnel inlet plugging device according to claim 7, characterized in that: The second adjustment assembly (9) includes a radial adjustment disc (91) rotatably connected to the inner ring side wall of the retaining ring (5). The radial adjustment disc (91) is of an annular structure. One ends of a plurality of the linkage rods (84) are fixedly connected to the inner ring side wall of the radial adjustment disc (91). A plurality of arc-shaped holes (911) are formed in the side wall of the radial adjustment disc (91). The plurality of arc-shaped holes (911) are arranged in a circumferential array.

9. The hydraulic tunnel inlet plugging device according to claim 8, characterized in that: The second adjustment assembly (9) further includes a plurality of guide blocks (92) fixedly connected to the inner ring side wall of the retaining ring (5). The plurality of guide blocks (92) are arranged in a circumferential array. A guide hole (921) is formed in the side wall of each of the guide blocks (92). The arc-shaped holes (911) and the guide holes (921) are arranged in one-to-one correspondence. A resisting rod (93) is slidably arranged inside the arc-shaped hole (911) and the guide hole (921) at the same position.

10. A hydraulic tunnel inlet plugging device according to claim 9, characterized in that: Each of the adjustment skeletons (10) includes a second connecting seat (101) fixedly connected to one end of the resisting rod (93). A first rotating rod (102) is rotatably connected to each of the second connecting seats (101). One end of each of the first rotating rods (102) away from the second connecting seat (101) is rotatably connected to a second rotating rod (103). One end of each of the second rotating rods (103) is rotatably connected to the side wall of the corresponding first connecting seat (834).

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