Tunnel secondary lining pouring valve with cut-off state and pouring system

Abstract

The utility model provides a tunnel secondary lining pouring valve with a cut-off state and a pouring system.The pouring valve comprises a valve body, an input opening and an output opening are formed in the two sides of the valve body in the radial direction, a pouring opening is formed in one end of the valve body in the axial direction, and a valve element assembly is arranged in the valve body and has three states that in the first state, the input opening communicates with the output opening, and the pouring opening is closed; the end face of the valve element assembly is flush with the pouring opening. In the second state, the input opening, the output opening and the pouring opening are all communicated; in the third state, the input opening, the output opening and the pouring opening are all closed; the driving part is used for driving the valve element assembly to be switched among the three states; by arranging the valve element assembly, the valve element assembly has a cut-off function in a third state, so that concrete does not need to be pumped to the tail end of the pipeline, and initial setting of the concrete in the pipeline during pouring is prevented; and meanwhile, when the valve element assembly is in the first state, the end face of the valve element assembly is flush with the pouring opening, poured concrete can be blocked and limited, and protrusions are prevented from being formed on the tunnel wall.

Description

Technical Field

[0001] This application relates to the field of tunnel secondary lining pouring technology, and in particular to a tunnel secondary lining pouring valve with a shut-off state and a pouring system. Background Technology

[0002] In tunnel secondary lining concrete construction, an integral formwork trolley is often used as the template system, and then concrete is pumped into the formwork for pouring. When using traditional methods for secondary lining concrete construction, to achieve symmetrical horizontal and vertical layered pouring, multiple concrete inlet windows are typically opened along the tunnel axis on the left and right sides of the trolley, and in upper, middle, and lower layers. Concrete is then delivered from the pump outlet to each inlet window via a pouring pipeline and multiple pouring valves. This method requires setting the pouring valves on the pouring pipeline to a straight-through state before introducing concrete into the entire pipeline to expel air. However, because the pouring process involves layered pouring, the concrete within the pouring pipeline is prone to initial setting when stationary for extended periods, clogging the pipeline and affecting normal construction. Furthermore, after pouring, gate valves are usually used to close the inlet windows on the template. However, since the gate valves are located on the side of the template furthest from the tunnel wall, a bulge with the same thickness as the template will form on the tunnel wall after the concrete solidifies. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a tunnel secondary lining pouring valve with a shut-off state and a pouring system.

[0004] Firstly, the purpose of this application is to address the above-mentioned problems by providing a tunnel secondary lining pouring valve with a shut-off state, comprising:

[0005] The valve body has a coaxial inlet and outlet on both sides along the radial direction, and a casting port is provided at the end of the valve body near the inlet along the axial direction.

[0006] A valve core assembly is disposed within the valve body and is movable along the axial direction of the valve body. The valve core assembly has a first state, a second state, and a third state. When in the first state, the input port is connected to the output port, the valve core assembly closes the pouring port, and the end face of the valve core assembly is flush with the pouring port. When in the second state, the input port, the output port, and the pouring port are all connected. When in the third state, the valve core assembly closes the input port, the output port, and the pouring port.

[0007] A drive unit, disposed within the valve body, is used to drive the valve core assembly to switch between the first state, the second state, and the third state.

[0008] According to certain embodiments of the present application, the technical solutions provided are as follows:

[0009] The valve body is provided with a guide port, which extends along the axial direction of the valve body;

[0010] It also includes a guide plate, which is fixed to the side of the valve core assembly away from the pouring port, and the guide plate can slide along the guide port to guide the valve core assembly.

[0011] According to the technical solutions provided in certain embodiments of this application, the valve core assembly includes:

[0012] A valve core is fixed on the drive end of the drive component. A first channel is radially formed on the valve core, and the first channel is used to connect the input port and the output port.

[0013] A sealing seat is provided on the side of the valve core away from the driving member, and the sealing seat is used to close the pouring port;

[0014] A first sealing element is sleeved on the outer periphery of the sealing seat, and the first sealing element is used to seal the inlet and the outlet.

[0015] According to the technical solutions provided in some embodiments of this application, the valve core assembly further includes a second sealing member, which is sleeved on the outer periphery of the valve core and located at one end of the valve core near the driving member.

[0016] According to the technical solutions provided in certain embodiments of this application, a mounting flange is provided around the pouring port on the valve body, and the mounting flange is used to connect the secondary lining template.

[0017] According to the technical solutions provided in certain embodiments of this application, the driving component is a driving cylinder, which is located on the side of the valve body away from the pouring port. The driving cylinder has a piston rod, and the free end of the piston rod is fixedly connected to the valve core assembly.

[0018] Secondly, this application provides a pouring system, including a tunnel secondary lining pouring valve with a shut-off state as described above, and a concrete pump, the output port of which is connected to a pouring pipeline, and a plurality of the pouring valves are installed in series on the pouring pipeline.

[0019] Compared with the prior art, the beneficial effects of this application are as follows: This application provides a tunnel secondary lining pouring valve with a shut-off state and a pouring system. The pouring valve includes a valve body, with coaxial inlet and outlet ports radially opened on both sides of the valve body. A pouring port is axially opened at one end of the valve body near the inlet port. A valve core assembly is provided inside the valve body, and the valve core assembly moves axially along the valve body. The valve core assembly has a first state, a second state, and a third state. When in the first state, the inlet and outlet ports are connected, the valve core assembly closes the pouring port, and the end face of the valve core assembly is flush with the pouring port. When in the second state, the inlet, outlet, and pouring port are all connected. When in the third state, the valve core assembly closes the inlet, outlet, and pouring port. It also includes a driving component, which is disposed inside the valve body and is used to drive the valve core assembly in the first state, the second state, and the third state. The system switches between three states. By setting a valve core assembly with three states, the valve core assembly can close the inlet, outlet, and pouring port in the third state, allowing the pouring valve to be adjusted to the shut-off state. Compared to the traditional pouring method where a shut-off valve is only set at the end of the pouring pipeline, the pouring valve with the shut-off state does not need to pump concrete to the end of the pipeline at the beginning of pouring, thus avoiding the presence of static concrete in the pouring pipeline for a long time during pouring, and preventing the initial setting of concrete in the pipeline from causing pipeline blockage. By making the end face of the valve core assembly in the first state flush with the pouring port, and the pouring port flush with the working surface of the template when the pouring valve is fixed on the template, the valve core assembly in the first state after pouring can replace the gate to close the pouring window, blocking and limiting the poured concrete and preventing the formation of protrusions on the tunnel wall.

[0020] It should be understood that the descriptions of technical features, technical solutions, beneficial effects, or similar language in this application do not imply that all features and advantages can be achieved in any single embodiment. Rather, it is understood that the description of a feature or beneficial effect means that a specific technical feature, technical solution, or beneficial effect is included in at least one embodiment. Therefore, the descriptions of technical features, technical solutions, or beneficial effects in this specification do not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions, and beneficial effects described in this embodiment can be combined in any suitable manner. Those skilled in the art will understand that embodiments can be implemented without one or more specific technical features, technical solutions, or beneficial effects of a particular embodiment. In other embodiments, additional technical features and beneficial effects may be identified in specific embodiments that do not embody all embodiments. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A cross-sectional view of a tunnel secondary lining pouring valve in a closed state in a straight-through state, provided in Embodiment 1 of this application;

[0023] Figure 2 A cross-sectional view of a tunnel secondary lining pouring valve in a cut-off state during the pouring process, provided in Embodiment 1 of this application;

[0024] Figure 3 A cross-sectional view of a tunnel secondary lining pouring valve in a closed state, as provided in Embodiment 1 of this application;

[0025] Figure 4 This is a top sectional view of a tunnel secondary lining casting valve in a shut-off state, provided in Embodiment 1 of this application;

[0026] Figure 5 A schematic diagram of the valve body of a tunnel secondary lining casting valve having a shut-off state, provided in Embodiment 1 of this application;

[0027] Figure 6 A schematic diagram of the valve core assembly of a tunnel secondary lining casting valve with a shut-off state, provided in Embodiment 1 of this application;

[0028] Figure 7 This is a structural schematic diagram of a casting system provided in Embodiment 2 of this application.

[0029] The text labels in the image represent:

[0030] 1. Valve body; 2. Valve core assembly; 3. Drive component; 4. Guide plate; 5. Mounting flange; 6. Casting pipeline; 7. Gate valve; 11. Inlet; 12. Outlet; 13. Casting port; 14. Guide port; 21. Valve core; 22. Sealing seat; 23. First sealing element; 24. Second sealing element; 25. Guide support ring seat; 211. First channel; 100. First floor area; 200. Second floor area; 300. Top area; 101. First window valve of the first floor; 102. Second window valve of the first floor; 103. Third window valve of the first floor; 201. First window valve of the second floor; 202. Second window valve of the second floor; 103. Third window valve of the second floor; 301. Top window valve. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The descriptions in this section are merely illustrative and explanatory, and should not be construed as limiting the scope of protection of this application. Specifically, the described embodiments are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort should fall within the scope of protection of this invention.

[0032] It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0033] Example 1

[0034] As mentioned in the background section, to address the problems existing in the prior art, this embodiment provides a tunnel secondary lining pouring valve with a shut-off state, comprising:

[0035] The valve body 1 has a coaxial inlet 11 and outlet 12 on both sides along the radial direction, and a casting port 13 is provided at the end of the valve body 1 near the inlet 11 along the axial direction.

[0036] Valve core assembly 2 is disposed inside valve body 1 and can move axially along valve body 1; valve core assembly 2 has a first state, a second state and a third state. When it is in the first state, the inlet 11 and the outlet 12 are connected, the valve core assembly 2 closes the pouring port 13, and the end face of the valve core assembly 2 is flush with the pouring port 13; when it is in the second state, the inlet 11, the outlet 12 and the pouring port 13 are all connected; when it is in the third state, the valve core assembly 2 closes the inlet 11, the outlet 12 and the pouring port 13.

[0037] The driving component 3 is located inside the valve body 1 and is used to drive the valve core assembly 2 to switch between the first state, the second state and the third state.

[0038] like Figure 1-3As shown, the valve body 1 is approximately cylindrical in structure, with an inlet 11 and an outlet 12 coaxially arranged. Both are located on the outer periphery of the valve body 1 and extend outwards from the valve body 1 to form interface ends, which are used to connect to the casting pipe 6. The casting port 13 is located at one end of the valve body 1 along its axial direction. The valve core assembly 2 is also approximately cylindrical in structure, located inside the valve body 1, and can move axially along the valve body 1 under the drive of the drive member 3. The valve core assembly 2 has a first channel 211 that connects the inlet 11 and the outlet 12. When the valve core assembly 2 is located at one end of the valve body 1, it closes the casting port 13, and the inlet 11 connects to the outlet 12 through the first channel 211, i.e., the first state described above. When the valve core assembly 2 moves towards the drive member 3 to the position where the inlet 11 and the outlet 12 are closed... When the valve core assembly 2 is in the closed state, i.e., the third state mentioned above; when the valve core assembly 2 continues to move towards the drive member 3 until it is located on the side of the input port 11 or output port 12 close to the drive member 3, the input port 11, output port 12 and pouring port 13 are all connected, i.e., the second state mentioned above; multiple pouring windows for pouring concrete are opened on the secondary lining template, and the pouring port 13 of the pouring valve is fixed on the secondary lining template corresponding to the pouring window, and the end face of the pouring port 13 is flush with the working surface of the secondary lining template. When the area where the pouring window is located is poured, the pouring valve corresponding to the pouring window switches to the first state, and the concrete flows to the next area to be poured through the input port 11 and output port 12 of the pouring valve. The end face of the valve core assembly 2 on the side away from the drive member 3 is flush with the pouring port 13, which can prevent the concrete from bulging at the pouring window after solidification.

[0039] In traditional pouring methods, multiple pouring valves are connected in series on the pouring pipeline. The inlet 11 and outlet 12 of the pouring valves are connected to the pouring pipeline, and a shut-off valve is installed at the end of the pouring pipeline. During pouring, all pouring valves on the pouring pipeline are adjusted to a straight-through state, that is, the inlet 11 is connected to the outlet 12, and the pouring port 13 is closed. Concrete is pumped into the pouring pipeline from the inlet until it flows out of the shut-off valve. At this time, it can be ensured that the air in the pouring pipeline is purged. Then the shut-off valve is closed, and the pouring port 13 of one or more pouring valves near the inlet of the pipeline is opened according to the pouring sequence to carry out the pouring operation. At this time, the concrete in the part of the pouring pipeline near the shut-off valve is in a static state, which is prone to initial setting and blockage of the pipeline.

[0040] By setting a valve core assembly 2 with three states, the valve core assembly 2 can close the inlet 11, outlet 12 and pouring port 13 in the third state, so that the pouring valve can be adjusted to the shut-off state. Compared with the traditional pouring method of setting a shut-off valve only at the end of the pouring pipeline, the pouring valve with the shut-off state does not need to pump concrete to the end of the pipeline at the beginning of pouring, thereby avoiding the presence of static concrete in the pouring pipeline for a long time during pouring, and preventing the concrete in the pipeline from initially setting and causing pipeline blockage. By making the end face of the valve core assembly 2 in the first state flush with the pouring port 13, and the pouring port 13 flush with the working surface of the template when the pouring valve is fixed on the template, the valve core assembly 2 in the first state after pouring can replace the gate to close the pouring window, blocking and limiting the poured concrete and preventing the formation of protrusions on the tunnel wall.

[0041] In a preferred embodiment, the valve core assembly 2 includes:

[0042] Valve core 21 is fixed on the drive end of drive component 3. A first channel 211 is provided on valve core 21 radially. The first channel 211 is used to connect input port 11 and output port 12.

[0043] Sealing seat 22 is located on the side of valve core 21 away from drive member 3. Sealing seat 22 is used to seal pouring port 13.

[0044] The first sealing element 23 is sleeved on the outer periphery of the sealing seat 22 and is used to seal the inlet 11 and the outlet 12.

[0045] like Figure 4 and Figure 6 As shown, the valve core 21 is approximately cylindrical in structure, with a first channel 211 formed radially in its middle portion. One end of the valve core 21 near the drive member 3 is fixedly connected to the drive end of the drive member 3, and the other end is provided with a guide support ring 25. A sealing seat 22 is connected to the guide support ring 25, and a first sealing element 23 is fitted around the outer periphery of the sealing seat 22. When in the first state, the valve core 21 moves between the input port 11 and the output port 12, the first channel 211 connects the input port 11 and the output port 12, and the sealing seat 22 and the first sealing element 23 are connected. The end of the seal 23 away from the valve core 21 closes the pouring port 13. When in the second state, both the valve core 21 and the sealing seat 22 move to the side of the input port 11 or output port 12 close to the drive member 3. The input port 11, output port 12 and pouring port 13 are connected through the inside of the valve body 1. When in the third state, the sealing seat 22 moves between the input port 11 and the output port 12, and the first seal 23 closes the input port 11 and the output port 12. At this time, the input port 11, output port 12 and pouring port 13 are not connected.

[0046] In a preferred embodiment,

[0047] A guide port 14 is provided on the valve body 1, and the guide port 14 extends along the axial direction of the valve body 1;

[0048] It also includes a guide plate 4, which is fixed on the side of the valve core assembly 2 away from the pouring port 13. The guide plate 4 can slide along the guide port 14 to guide the valve core assembly 2.

[0049] like Figure 4 and Figure 5 As shown, a guide port 14 is provided on the outer periphery of the valve body 1 near the drive member 3. The guide port 14 extends along the axial direction of the valve body 1. A guide plate 4 is fixed on the side of the valve core 21 near the drive member 3. The guide plate 4 is partially embedded in the guide port 14 and can slide along the axial direction of the valve body 1. By providing a guide port 14 on the valve body 1 and a guide plate 4 that cooperates with the guide port 14, and fixing the guide plate 4 to the valve core 21, the valve core assembly 2 can be guided and limited when it moves along the axial direction of the valve body 1, thus preventing the valve core assembly 2 from deflecting.

[0050] In a preferred embodiment, the valve core assembly 2 further includes a second seal 24, which is sleeved on the outer periphery of the valve core 21 and located at the end of the valve core 21 near the drive member 3.

[0051] like Figure 6 As shown, the second seal 24 is sleeved on the end of the valve core 21 near the drive member 3. When in the first state, the valve core 21 moves between the input port 11 and the output port 12. The first channel 211 connects the input port 11 and the output port 12. The second seal 24 fills the gap between the valve core 21 and the inner wall of the valve body 1 to prevent the concrete flowing through the first channel 211 from entering the space where the drive member 3 is located.

[0052] In a preferred embodiment, a mounting flange 5 is provided around the pouring port 13 on the valve body 1, and the mounting flange 5 is used to connect the secondary lining template.

[0053] like Figure 5 As shown, the mounting flange 5 is arranged around the pouring port 13, and the mounting flange 5 has multiple connection holes for fixing to the secondary lining template.

[0054] In a preferred embodiment, the driving component 3 is a driving cylinder, which is located inside the valve body 1 on the side away from the pouring port 13. The driving cylinder has a piston rod, and the free end of the piston rod is fixedly connected to the valve core assembly 2.

[0055] like Figure 1 As shown, the drive cylinder is fixed inside the valve body 1, and its piston cylinder is threadedly connected to the valve core 21, which is used to drive the valve core 21 to move axially along the valve body 1.

[0056] Example 2

[0057] This embodiment provides a pouring system, including a tunnel secondary lining pouring valve with a shut-off state as described in Embodiment 1, and a concrete pump. The output port 12 of the concrete pump is connected to a pouring pipeline 6, and multiple pouring valves are installed in series on the pouring pipeline 6.

[0058] like Figure 7 As shown, the secondary lining formwork is an arched structure, and pouring is carried out on both sides separately. In this embodiment, the pouring process on one side is taken as an example. The secondary lining formwork can be divided into a first-layer area 100, a second-layer area 200, and a top area 300. Each layer has one or more pouring windows, and a pouring valve is set at the pouring window. The pouring pipeline 6 is connected in series with each pouring valve, and a shut-off valve 7 is also set at the end of the pipeline. Initially, all pouring valves are in a straight-through state, that is, the inlet 11 is connected to the outlet 12, the pouring outlet 13 is closed, and the shut-off valve 7 is open. When the concrete pump is started, the concrete is pumped from the outlet 12 of the concrete pump to the pouring pipeline. Within step 6, after the concrete passes through the second-layer first window valve 201, adjust the second-layer first window valve 201 to the shut-off state, that is, the inlet 11, outlet 12, and pouring outlet 13 are all closed. Adjust the first-layer first window valve 101 to the pouring state, that is, the inlet 11, outlet 12, and pouring outlet 13 are all connected, and start pouring concrete for the first window of the first-layer area 100. At the same time, the first-layer second window valve 102 and the first-layer third window valve 103 can be adjusted to the pouring state. If the concrete accumulation height at a certain pouring window in the first-layer area 100 is significantly higher than the concrete accumulation height at other pouring windows, then adjust the corresponding... The pouring valves are adjusted to the straight-through state; until the accumulated concrete height of all pouring windows reaches the midpoint between the pouring windows of the first-floor area 100 and the second-floor area 200, all pouring valves in the first-floor area 100 are adjusted to the straight-through state. After the concrete passes through the top-pour window valve 301, the top-pour window valve 301 is adjusted to the shut-off state, and the first window valve 201 of the second floor is adjusted to the pouring state to pour concrete for the first window of the second-floor area 200. At the same time, the second window valve 202 and the third window valve 202 of the second floor can be adjusted to the pouring state. Similarly, if the concrete accumulates at a certain pouring window in the second-floor area 200... If the height of the concrete accumulation at the pouring window is significantly higher than that at other pouring windows, adjust the corresponding pouring valve to the straight-through state. When the cumulative height of the concrete at all pouring windows reaches the middle position between the pouring windows in the second-floor area 200 and the pouring windows in the top area 300, adjust all pouring valves in the second-floor area 200 to the straight-through state. After the concrete flows out from the stop valve 7, close the stop valve 7 and simultaneously adjust the top window valve 301 to the pouring state to pour the top area 300. When the top area 300 is fully filled, adjust the top window valve 301 to the straight-through state, open the stop valve 7, and perform the cleaning operation of the pouring pipeline 6.

[0059] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A tunnel diaphragm valve having a closed state, characterized by include: The valve body (1) has a coaxial inlet (11) and outlet (12) on both sides along the radial direction. The valve body (1) has a casting port (13) on one end near the inlet (11) along the axial direction. A valve core assembly (2) is disposed within the valve body (1) and is movable along the axial direction of the valve body (1). The valve core assembly (2) has a first state, a second state, and a third state. When in the first state, the inlet (11) is connected to the outlet (12), the valve core assembly (2) closes the pouring port (13), and the end face of the valve core assembly (2) is flush with the pouring port (13). When in the second state, the inlet (11), the outlet (12), and the pouring port (13) are all connected. When in the third state, the valve core assembly (2) closes the inlet (11), the outlet (12), and the pouring port (13). A drive unit (3) is disposed inside the valve body (1) and is used to drive the valve core assembly (2) to switch between the first state, the second state and the third state.

2. A tunnel secondary lining pouring valve with a shut-off state according to claim 1, characterized in that, The valve body (1) is provided with a guide port (14), which extends along the axial direction of the valve body (1). It also includes a guide plate (4), which is fixed to the side of the valve core assembly (2) away from the pouring port (13) and can slide along the guide port (14) to guide the valve core assembly (2).

3. A tunnel diaphragm valve with a closed state according to claim 1, characterized in that, The valve core assembly (2) includes: Valve core (21), the valve core (21) is fixed on the driving end of the driving member (3), and a first channel (211) is provided on the valve core (21) radially, the first channel (211) is used to connect the input port (11) and the output port (12). A sealing seat (22) is provided on the side of the valve core (21) away from the drive member (3), and the sealing seat (22) is used to close the pouring port (13). The first sealing element (23) is sleeved on the outer periphery of the sealing seat (22) and is used to close the inlet (11) and the outlet (12).

4. A tunnel diaphragm valve with a closed state according to claim 3, characterized in that, The valve core assembly (2) further includes a second seal (24), which is sleeved on the outer periphery of the valve core (21) and located at one end of the valve core (21) near the drive member (3).

5. A tunnel diaphragm valve with a closed state according to claim 1, characterized in that, The valve body (1) is provided with a mounting flange (5) around the pouring port (13), and the mounting flange (5) is used to connect the secondary lining template.

6. A tunnel secondary lining pouring valve with a shut-off state according to claim 1, characterized in that, The driving component (3) is a driving cylinder, which is located inside the valve body (1) on the side away from the pouring port (13). The driving cylinder has a piston rod, and the free end of the piston rod is fixedly connected to the valve core assembly (2).

7. A placement system characterized by, The system includes a tunnel secondary lining pouring valve with a shut-off state as described in any one of claims 1-6, and also includes a concrete pump, the output port of which is connected to a pouring pipeline (6), and a plurality of the pouring valves are installed in series on the pouring pipeline (6).

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