Tunnel construction grouting equipment

Abstract

The application discloses a tunnel construction grouting equipment, one end of a grouting pipe is embedded in a lining rack to extend into a grouting area, the other end is left outside the lining rack, one end of a pipeline is connected with a grouting machine, the other end is connected with the grouting pipe, so that slurry is poured into the grouting area, a valve plate can be moved in a valve section to a first posture to make a side wall of the valve plate adapt to abut against an inner side wall of the valve section to block slurry flow, or be moved to a second posture to make the valve plate parallel to an extension direction of the pipeline to reduce slurry flow resistance. When the grouting machine drives slurry to flow through the valve section, the slurry pushes the valve plate to rotate and transition from the first posture to the second posture, and meanwhile, a reset member linked with a shaft piece of the valve plate is deformed to store energy. When grouting is stopped, the reset member releases the stored energy to push the valve plate to rotate and transition from the second posture to the first posture to realize sealing. The design realizes self-control of grouting on-off through fluid power linkage of the valve plate and the reset member.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction equipment, and more particularly to a tunnel construction grouting equipment. Background Technology

[0002] Tunnel lining construction is a crucial step in tunnel engineering. Its main function is to support and maintain the long-term stability and durability of the tunnel, prevent the surrounding rock from loosening or collapsing, and bear the loads from the pressure of the surrounding rock and the self-weight of the structure. During this process, problems such as segregation, insufficient vibration, or formwork deformation during concrete pouring can easily lead to cavities or voids in the tunnel arch area. To address this, grouting with formwork is commonly used. This involves injecting grout into the gap between the arch and the waterproofing slab through pre-embedded radial grouting pipes during the initial setting stage of the concrete, thereby filling the voids and eliminating voids. During arch-mounted grouting, grout is typically injected sequentially along the grouting pipes. After grouting, the grout filling the arch area is prone to backflow along the grouting pipes. Currently, ball valves are commonly used to prevent grout backflow. However, under continuous grouting pressure, the valve seat wear gradually accelerates. Relying solely on ball valve sealing not only shortens its service life but also requires further improvement in preventing grout backflow.

[0003] Existing technology, as disclosed in publication number CN121162311A, provides a grouting device for tunnel lining arch with formwork, comprising a lining trolley and a waterproofing plate. The waterproofing plate is arranged on the tunnel roof. Lining concrete is poured between the top formwork of the lining trolley and the waterproofing plate. End formworks for sealing the lining concrete are provided at both ends of the lining trolley. A plurality of grouting pipes are arranged at equal intervals on the top formwork of the lining trolley. The top ends of the grouting pipes pass through the lining concrete and abut against the waterproofing plate, while the bottom ends pass through the top formwork of the lining trolley and are connected to one end of a connecting sleeve. The other end of the connecting sleeve is connected to a grout-stopping pipe. The grout-stopping pipe keeps the pipe open during grouting and closes the pipe when grouting stops. This invention realizes the segmented grouting process of the arch with formwork, and utilizes the grout-stopping pipe's grout-blocking effect to ensure compact grout filling, effectively preventing grout backflow and overflow, thus significantly improving grouting quality.

[0004] However, the existing technology still has certain shortcomings in use. During the grouting process, grout residue can easily remain in key moving parts such as the compression spring, sliding groove, or spring groove, potentially causing the mechanism to jam. This can affect the normal unfolding and fitting of the corrugated folded plate, making it difficult to guarantee the sealing reliability of the grouting pipe. Therefore, this invention provides a tunnel construction grouting device. Summary of the Invention

[0005] This invention proposes a tunnel construction grouting device, comprising: a grouting machine, a pipeline, a grouting pipe, a valve plate, and a resetting component. One end of the grouting pipe is embedded within a lining support frame to extend into the grouting area, while the other end remains outside the lining support frame. One end of the pipeline is connected to the grouting machine, and the other end has a detachable end cap, which can be detachably connected to the end of the grouting pipe outside the lining support frame, allowing the grouting machine to inject grout into the grouting area through the pipeline and the grouting pipe. A valve section is provided in the pipeline, and the valve plate is movably mounted within the valve section via a shaft. The valve plate can move to a first position within the valve section so that its sidewalls fit against the inner sidewall of the valve section to block the flow of slurry within the valve section. The valve plate can also move to a second position within the valve section so that it is parallel to the pipeline extension direction to reduce the flow resistance of the slurry. When the grouting machine drives the slurry to flow through the valve section, the slurry will push the valve plate to rotate and transition from the first position to the second position, while simultaneously deforming and storing energy in the reset component linked to the valve plate shaft. When the grouting machine stops delivering the slurry, the reset component will restore energy and push the valve plate to rotate and transition from the second position to the first position.

[0006] Furthermore, it also includes a limiting component, which is used to maintain the first posture after the valve plate transitions from the second posture to the first posture, and is also used to maintain the second posture after the valve plate transitions from the first posture to the second posture.

[0007] Furthermore, the shaft specifically includes a first shaft and a second shaft arranged coaxially. One end of the first shaft is fixed to the valve plate, and the other end passes through the valve section sidewall that forms a dynamic seal with the first shaft. One end of the second shaft is fixed to the valve plate, and the other end passes through the valve section sidewall that forms a dynamic seal with the second shaft. The longitudinal section of the valve plate passing through the axis of the first shaft can divide the valve plate into two parts of unequal volume.

[0008] Furthermore, the limiting component includes a sleeve portion located outside the pipeline and fixedly connected to the outer wall of the pipeline. A first shaft body extending through the side wall of the valve section enters the sleeve portion and is arranged coaxially with the sleeve portion. The inner wall of the sleeve portion has a first protrusion and a second protrusion arranged at intervals. There is a first interval between the first protrusion and the second protrusion extending clockwise from the first protrusion side to the second protrusion side. The first shaft body has a third protrusion. When the valve plate transitions from the first posture / second posture to the second posture / first posture, the third protrusion moves within the first interval. When the valve plate moves to the second posture / first posture, the third protrusion simultaneously abuts against the first protrusion / second protrusion so that the continued movement tendency of the third protrusion is blocked by the first protrusion / second protrusion, thereby maintaining the valve plate in the second posture / first posture.

[0009] Furthermore, there is a second gap between the first protrusion and the second protrusion, extending counterclockwise from the first protrusion side to the second protrusion side. The first shaft also has a fourth protrusion. When the valve plate transitions from the first posture / second posture to the second posture / first posture, the fourth protrusion moves within the second gap. When the valve plate moves to the second posture / first posture, the fourth protrusion simultaneously abuts against the second protrusion / first protrusion so that the continued movement tendency of the fourth protrusion is blocked by the second protrusion / first protrusion, thereby maintaining the valve plate in the second posture / first posture.

[0010] Furthermore, the grouting pipe is equipped with a valve, which includes a discharge hood, a cross frame, a plate, and a driving component. The top of the discharge hood is detachably connected to the bottom of the valve section. The cross frame is disposed on the side of the discharge hood, and a notch is provided at the connection between the cross frame and the discharge hood. The plate is slidably disposed within the cross frame, and the side end of the plate is arranged at the notch. The driving component is disposed within the cross frame and is used to drive the plate to move so that it extends into the discharge hood to close the discharge hood.

[0011] Furthermore, the valve also includes: a pair of clamping plates and an elastic element, the clamping plates being slidably disposed within the horizontal frame, and the two clamping plates being located above and below the plate body respectively; the elastic element being disposed within the horizontal frame and corresponding to the two clamping plates, for driving the two clamping plates to move closer together to clamp the plate body.

[0012] Furthermore, the insertion end of the plate is triangular in shape, and the opposite sides of the two clamping plates are inclined surfaces adapted to the triangular structure, so that the two clamping plates can fit completely into the insertion end of the plate.

[0013] Furthermore, the pipeline is equipped with a pressure sensor and a controller for monitoring the pressure of the grout inside the pipeline. The controller is used to control the grouting machine to stop injecting grout when the real-time data of the pressure sensor exceeds a preset value.

[0014] This invention proposes a tunnel construction grouting device that achieves autonomous control of grouting on / off through the hydrodynamic linkage between a valve plate and a reset component. The grout flow impact drives the valve plate to rotate and open; when grouting stops, the reset component releases its stored energy to drive the valve plate to close and seal, significantly reducing the need for manual intervention. The bidirectional locking mechanism of the limiting component, combined with the asymmetrical volume structure of the valve plate, enhances the stability of the closed posture under reverse pressure, improving the sealing reliability under high-pressure conditions. The valve, as an independent emergency shut-off mechanism, achieves mechanical forced locking under overpressure conditions through a controller linked to a pressure sensor, forming a fault-tolerant barrier. The inclined adaptation structure of the clamping plate and the plate body simultaneously scrapes away residual grout during the shut-off process, effectively solving the potential for valve cavity blockage. The pressure sensor monitors the system pressure in real time and triggers coordinated commands for grouting machine shutdown and valve closure, constructing a closed-loop safety protection system. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the tunnel grouting equipment construction in an embodiment of the present invention; Figure 2 This is a schematic diagram of the overall structure of the tunnel construction grouting equipment in an embodiment of the present invention; Figure 3 This is a schematic diagram of the grout-stopping mechanism in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the reset component in an embodiment of the present invention; Figure 5 a is a schematic diagram of the closed disk being closed, and b is a schematic diagram of the closed disk being opened; Figure 6 This is a schematic diagram of the internal structure of the shielding mechanism in an embodiment of the present invention; Figure 7 This is a cross-sectional structural schematic diagram of the shielding mechanism in an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the driving component in an embodiment of the present invention; Figure 9 for Figure 7 Enlarged structural diagram at point A; Detailed Implementation

[0016] refer to Figure 1-9This invention proposes a tunnel construction grouting device, comprising: a grouting machine 3, a pipeline 4, a grouting pipe 1, a valve plate 702, and a resetting component 704. One end of the grouting pipe 1 is embedded in the lining support 2 to extend into the grouting area, while the other end remains outside the lining support 2. One end of the pipeline 4 is connected to the grouting machine 3, and the other end has a detachable end cap, which can be detachably connected to the end of the grouting pipe 1 remaining outside the lining support 2, allowing the grouting machine 3 to inject grout into the grouting area through the pipeline 4 and the grouting pipe 1. A valve section is provided in the pipeline 4, and the valve plate 702 is movably installed within the valve section via a shaft. 02 can move to a first posture within the valve section so that the side wall of the valve plate 702 fits against the inner side wall of the valve section to block the flow of slurry within the valve section. The valve plate 702 can move to a second posture within the valve section so that the valve plate 702 is parallel to the extension direction of the pipeline 4 to reduce the flow resistance of the slurry. When the grouting machine 3 drives the slurry to flow through the valve section, the slurry will push the valve plate 702 to rotate and transition from the first posture to the second posture, while at the same time causing the reset member 704, which is linked to the shaft of the valve plate 702, to deform and store energy. When the grouting machine 3 stops delivering slurry, the reset member 704 will be restored by applying energy and push the valve plate 702 to rotate and transition from the second posture to the first posture. Specifically, the grouting machine 3 is a hydraulic power device for conveying grout; the pipeline 4 is a flexible channel connecting the grouting machine 3 and the grouting pipe 1; the grouting pipe 1 is a rigid pipe embedded in the lining frame 2; the valve plate 702 is a rotating baffle set in the valve section of the pipeline 4; and the reset element 704 is an elastic element that provides the reset torque of the valve plate 702. Specifically, one end of the grouting pipe 1 extends to the tunnel grouting area, and the other end is exposed in the lining frame 2; one end of the pipeline 4 is connected to the grouting machine 3, and the other end is connected to the exposed end of the grouting pipe 1 through a detachable joint; when grouting starts, the grout flows through the valve section and impacts the valve plate 702, pushing the valve plate 702 from the first posture of blocking the flow channel to the second posture parallel to the extension direction of the pipeline 4. During this process, the reset element 704 is linked by the first shaft 701 to generate elastic deformation and store energy; when grouting stops, the reset element 704 releases the stored torque to drive the valve plate 702 to rotate from the second posture back to the first posture to achieve flow channel sealing.

[0017] Furthermore, it also includes a limiting component, which is used to maintain the first posture after the valve plate 702 transitions from the second posture to the first posture, and also to maintain the second posture after the valve plate 702 transitions from the first posture to the second posture. Specifically, the limiting component is a mechanical positioning mechanism that limits the rotation angle of the valve plate 702. Specifically, when the valve plate 702 moves to the second or first posture, the limiting component physically locks itself by abutting the fixed position through the linkage component of the first shaft 701; when the valve plate 702 transitions from the first posture to the second posture, the limiting component locks the open position and maintains the energy storage state of the reset component 704; when rotating from the second posture to the first posture, the limiting component switches the contact point to the fixed closed position. At this time, the volume difference structure formed by the longitudinal section of the valve plate 702 being divided by the axis of the first shaft 701 enhances the locking force of the limiting contact point under the action of reverse pressure. Moreover, when grouting is started, the grout flows through the valve section and impacts the valve plate 702, forming an asymmetrical pressure on the valve plate 702, which helps to push the valve plate 702 from the first posture that blocks the flow channel to the second posture that is parallel to the extension direction of the pipeline 4.

[0018] Furthermore, the shaft specifically includes a first shaft 701 and a second shaft arranged coaxially. One end of the first shaft 701 is fixed to the valve plate 702, and the other end passes through the valve section sidewall that forms a dynamic seal with the first shaft 701. One end of the second shaft is fixed to the valve plate 702, and the other end passes through the valve section sidewall that forms a dynamic seal with the second shaft. The longitudinal section of the valve plate 702 passing through the axis of the first shaft 701 can divide the valve plate 702 into two parts of unequal volume. Specifically, the first shaft 701 is a rotating shaft that passes through the valve plate 702 and extends to the outside of the valve section; the second shaft is a rotating shaft arranged coaxially with the first shaft 701. The first shaft 701 and the second shaft together constitute the rotating shaft through which the valve plate 702 rotates; the dynamic seal is specifically a sealing structure that allows the shaft to rotate while maintaining the flow channel sealed. Specifically, the first shaft 701 and the second shaft are fixed to both sides of the valve plate 702 and pass through the side wall of the valve section, and the dynamic sealing structure prevents slurry leakage; the longitudinal section of the valve plate 702 is divided into two parts with different volumes by the axis of the first shaft 701; when the slurry impacts, it acts on the large volume area of ​​the valve plate 702 to generate driving torque, and the small volume area reduces the rotation resistance; the dual shafts extend to the outside of the valve section to connect the limiting component and the reset component 704.

[0019] Furthermore, the limiting component includes a sleeve portion 703 located outside the pipeline 4 and fixedly connected to the outer wall of the pipeline 4. A first shaft 701, which extends through the side wall of the valve section, enters the sleeve portion 703 and is coaxially arranged with the sleeve portion 703. The inner wall of the sleeve portion 703 has a first protrusion 706 and a second protrusion arranged at intervals. There is a first interval between the first protrusion 706 and the second protrusion, which extends clockwise from the side of the first protrusion 706 to the side of the second protrusion. The first shaft 701 has a third protrusion 705. When the valve plate 702 transitions from the first posture / second posture to the second posture / first posture, the third protrusion 705 moves within the first interval. When the valve plate 702 moves to the second posture / first posture, the third protrusion 705 simultaneously abuts against the first protrusion 706 / second protrusion so that the continued movement tendency of the third protrusion 705 is blocked by the first protrusion 706 / second protrusion, thereby maintaining the valve plate 702 in the second posture / first posture. Specifically, the sleeve portion 703 is a cylindrical cover fixed to the outer wall of the pipeline 4; the first protrusion 706 and the second protrusion are radial limiting blocks on the inner wall of the sleeve portion 703; and the third protrusion 705 is a radially protruding arm fixed to the first shaft 701. Specifically, the sleeve portion 703 is coaxially sleeved to the outer end of the first shaft 701, and its inner wall is provided with the first protrusion 706 and the second protrusion to form an angle limiting range; during the rotation of the valve plate 702, the third protrusion 705 moves within the interval between the first protrusion 706 and the second protrusion; when the valve plate 702 rotates to the second posture, the third protrusion 705 abuts against the first protrusion 706 to prevent further rotation, and when it rotates to the first posture, it abuts against the second protrusion to achieve locking.

[0020] Furthermore, a second gap extends counterclockwise from the side of the first protrusion 706 to the side of the second protrusion between the first protrusion 706 and the second protrusion. A fourth protrusion is also present on the first shaft 701. During the transition of the valve plate 702 from the first posture / second posture to the second posture / first posture, the fourth protrusion moves within the second gap. When the valve plate 702 moves to the second posture / first posture, the fourth protrusion simultaneously abuts against the second protrusion / first protrusion 706, thus blocking the continued movement of the fourth protrusion and maintaining the valve plate 702 in the second posture / first posture. Specifically, the fourth protrusion is an auxiliary limiting arm fixed to the first shaft 701 and arranged at an angle to the third protrusion 705; the second gap is specifically an arc-shaped moving channel in the counterclockwise direction on the inner wall of the sleeve portion 703. Specifically, the third protrusion 705 moves within a clockwise extending first interval to control the opening stroke of the valve plate 702, and the fourth protrusion moves within a counterclockwise extending second interval to control the closing stroke. When the valve plate 702 rotates to the second position, the third protrusion 705 abuts against the first protrusion 706, and the fourth protrusion simultaneously abuts against the second protrusion to form a bidirectional lock. When rotated back to the first position, the fourth protrusion abuts against the first protrusion 706, and the third protrusion 705 abuts against the second protrusion to jointly share the locking force. An auxiliary sleeve identical to the sleeve portion 703 is added to the outside of the second shaft. The inner wall of the auxiliary sleeve is provided with mirror-distributed first and second auxiliary protrusions, and the third and fourth auxiliary protrusions are fixed to the second shaft. When the valve plate 702 rotates, the protrusion groups of the first shaft 701 and the second shaft simultaneously abut against the limiting blocks in their respective sleeves, eliminating shaft misalignment caused by unilateral torque.

[0021] Furthermore, the grouting pipe 1 is provided with a valve 6, which includes: a discharge hood 600, a horizontal frame 601, a plate 603, and a driving component 608. The top end of the discharge hood 600 is detachably connected to the bottom end of the valve section. The horizontal frame 601 is disposed on the side of the discharge hood 600, and a notch 602 is provided at the connection between the horizontal frame 601 and the discharge hood 600. The plate 603 is slidably disposed within the horizontal frame 601, and the side end of the plate 603 is arranged at the notch 602. The driving component 608 is disposed within the horizontal frame 601 and is used to drive the plate 603 to move so that it extends into the discharge hood 600 to close the discharge hood 600. Specifically, valve 6 is a flow channel cutting-off mechanism composed of discharge hood 600, horizontal frame 601, plate 603, and driving component 608; discharge hood 600 is a transition cavity connecting valve section and pipeline 4; horizontal frame 601 is a guide rail frame fixed to the side of discharge hood 600; plate 603 is a cutting baffle that slides within horizontal frame 601; and driving component 608 is a power unit that drives plate 603 to move. Specifically, the top of discharge hood 600 is connected to the bottom of valve section, and a notch 602 is opened on the side of horizontal frame 601 to connect to discharge hood 600; when driving component 608 is activated, it pushes plate 603 to slide laterally along horizontal frame 601, and the insertion end of plate 603 extends into discharge hood 600 through notch 602 to block slurry flow.

[0022] Valve plate 702 constitutes the main valve, realizing automatic control of slurry flow; valve 6 serves as an independent emergency valve, which is triggered by the controller to force shut-off in case of abnormal pressure. The main valve relies on fluid power to achieve high-frequency opening and closing, while the emergency valve provides fault protection through mechanical drive.

[0023] Furthermore, the valve 6 also includes: a pair of clamping plates 604 and an elastic element 605. The clamping plates 604 are slidably disposed within the horizontal frame 601, and the two clamping plates 604 are respectively located above and below the plate body 603. The elastic element 605 is disposed within the horizontal frame 601 and corresponds to the two clamping plates 604, used to drive the two clamping plates 604 to move closer together to clamp the plate body 603. Specifically, the clamping plates 604 are paired scraping clips disposed on the upper and lower sides of the plate body 603; the elastic element 605 is specifically a spring telescopic rod that drives the clamping plates 604 to clamp. Specifically, when the plate 603 slides within the horizontal frame 601, the upper and lower clamping plates 604 normally clamp the surface of the plate 603 under the action of the elastic element 605; during the process of the plate 603 being inserted into the discharge hood 600, its insertion end pushes open the clamping plate 604 to overcome the resistance of the elastic element 605; when the plate 603 is withdrawn, the clamping plate 604 re-adheres to the surface of the plate 603 under the action of elastic restoring force to scrape off the slurry residue.

[0024] Furthermore, the insertion end of the plate 603 has a triangular structure, and the opposite sides of the two clamping plates 604 are inclined surfaces adapted to the triangular structure, allowing the two clamping plates 604 to fully fit against the insertion end of the plate 603. Specifically, the triangular wedge structure of the plate 603 guides the clamping plates 604 to separate smoothly during insertion; the geometric adaptation between the inclined surfaces of the clamping plates 604 and the inclined surfaces of the plate 603 provides a uniform pressure distribution; when the plate 603 is fully inserted, the base of the triangle forms a surface contact seal with the clamping plates 604 to prevent leakage.

[0025] Furthermore, the pipeline 4 is equipped with a pressure sensor 5 for monitoring the grout pressure within the pipeline 4, and a controller. The controller is used to control the grouting machine 3 to stop injecting grout when the real-time data from the pressure sensor 5 exceeds a preset value. Specifically, the pressure sensor 5 is a sensing device for monitoring the grout pressure within the pipeline 4; the controller is a processor that receives sensor signals and controls the start and stop of the grouting machine 3. Specifically, the pressure sensor 5 collects grouting pressure data in real time, and the controller compares the grouting pressure data with a preset safety threshold. When the pressure exceeds the preset safety threshold due to water hammer or other factors, the grouting machine 3 will not stop, and the valve plate 702 will not activate to block the pipeline pressure transmission and prevent equipment damage. However, the controller will trigger the drive component 608 to drive the plate 603 to quickly close the pressure transmission within the pipeline to prevent equipment damage and simultaneously control the grouting machine 3 to stop operating. Assuming no valve structure is designed, when the controller directly controls the grouting machine 3 to stop when the pressure exceeds the preset safety threshold, the valve plate 702's activation process will be relatively slow, making it difficult to promptly block the pressure transmission within the pipeline, thus failing to completely prevent equipment damage.

[0026] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A tunnel construction grouting device, characterized in that, include: Grouting machine (3), pipeline (4), grouting pipe (1), valve plate (702), reset piece (704), wherein one end of the grouting pipe (1) is embedded in the lining platform (2) to extend into the area to be grouted, and the other end of the grouting pipe (1) remains outside the lining platform (2); One end of the pipeline (4) is connected to the grouting machine (3), and the other end is provided with a detachable end. This detachable end can be detachably connected to the end of the grouting pipe (1) that is outside the lining platform (2), so that the grouting machine (3) can inject grout into the grouting area through the pipeline (4) and the grouting pipe (1). A valve section is provided in the pipeline (4), and the valve plate (702) is movably installed in the valve section through a shaft. The valve plate (702) can move to a first position in the valve section so that the side wall of the valve plate (702) fits against the inner side wall of the valve section to block the flow of grout in the valve section. The valve plate (702) can move to the second posture within the valve section and make the valve plate (702) parallel to the extension direction of the pipeline (4) to reduce the resistance to slurry flow; when the grouting machine (3) drives the slurry to flow through the valve section, the slurry will push the valve plate (702) to rotate and transition from the first posture to the second posture, and at the same time, the reset member (704) linked with the valve plate (702) shaft will deform and store energy; when the grouting machine (3) stops conveying slurry, the reset member (704) will restore energy and push the valve plate (702) to rotate and transition from the second posture to the first posture.

2. The tunnel construction grouting equipment as described in claim 1, characterized in that, It also includes a limiting component, which is used to maintain the first posture after the valve plate (702) transitions from the second posture to the first posture, and is also used to maintain the second posture after the valve plate (702) transitions from the first posture to the second posture.

3. The tunnel construction grouting equipment as described in claim 2, characterized in that, The shaft specifically includes a first shaft (701) and a second shaft arranged coaxially. One end of the first shaft (701) is fixed to the valve plate (702), and the other end passes through the valve section sidewall that forms a dynamic seal with the first shaft (701). One end of the second shaft is fixed to the valve plate (702), and the other end passes through the valve section sidewall that forms a dynamic seal with the second shaft. The longitudinal section of the valve plate (702) passing through the axis of the first shaft (701) can divide the valve plate (702) into two parts with different volumes.

4. The tunnel construction grouting equipment as described in claim 3, characterized in that, The limiting assembly includes a sleeve portion (703) located outside the pipeline (4) and fixedly connected to the outer wall of the pipeline (4). A first shaft (701) extending through the side wall of the valve section enters the sleeve portion (703) and is coaxially arranged with the sleeve portion (703). The inner wall of the sleeve portion (703) has a first protrusion (706) and a second protrusion arranged at intervals. There is a first gap between the first protrusion (706) and the second protrusion extending clockwise from the side of the first protrusion (706) to the side of the second protrusion. The first shaft (701) has The third protrusion (705) moves within the first interval during the transition of the valve plate (702) from the first posture / second posture to the second posture / first posture. When the valve plate (702) moves to the second posture / first posture, the third protrusion (705) simultaneously abuts against the first protrusion (706) / second protrusion so that the continued movement tendency of the third protrusion (705) is blocked by the first protrusion (706) / second protrusion, thereby keeping the valve plate (702) in the second posture / first posture.

5. The tunnel construction grouting equipment as described in claim 4, characterized in that, There is a second gap between the first protrusion (706) and the second protrusion, extending counterclockwise from the side of the first protrusion (706) to the side of the second protrusion. The first shaft (701) also has a fourth protrusion. When the valve plate (702) transitions from the first posture / second posture to the second posture / first posture, the fourth protrusion moves within the second gap. When the valve plate (702) moves to the second posture / first posture, the fourth protrusion simultaneously abuts against the second protrusion / first protrusion (706) so that the continued movement tendency of the fourth protrusion is blocked by the second protrusion / first protrusion (706), thereby keeping the valve plate (702) in the second posture / first posture.

6. The tunnel construction grouting equipment as described in claim 5, characterized in that, The grouting pipe (1) is provided with a valve (6), which includes: a discharge hood (600), a horizontal frame (601), a plate (603), and a driving component (608). The top of the discharge hood (600) is detachably connected to the bottom of the valve section. The horizontal frame (601) is provided on the side of the discharge hood (600), and a notch (602) is provided at the connection between the horizontal frame (601) and the discharge hood (600). The plate (603) is slidably disposed in the horizontal frame (601), and the side end of the plate (603) is arranged at the notch (602). The driving component (608) is disposed in the horizontal frame (601) and is used to drive the plate (603) to move so that it extends into the discharge hood (600) to close the discharge hood (600).

7. The tunnel construction grouting equipment as described in claim 6, characterized in that, The valve (6) further includes: a pair of clamping plates (604) and an elastic element (605). The clamping plates (604) are slidably disposed within the horizontal frame (601), and the two clamping plates (604) are respectively located above and below the plate body (603). The elastic element (605) is disposed within the horizontal frame (601) and corresponds to the two clamping plates (604), and is used to drive the two clamping plates (604) to move closer together to clamp the plate body (603).

8. The tunnel construction grouting equipment as described in claim 7, characterized in that, The insertion end of the plate (603) has a triangular structure, and the opposite sides of the two clamping plates (604) are inclined surfaces adapted to the triangular structure, so that the two clamping plates (604) can be completely fitted with the insertion end of the plate (603).

9. The tunnel construction grouting equipment as described in claim 8, characterized in that, The pipeline (4) is equipped with a pressure sensor (5) for monitoring the pressure of the grout in the pipeline (4) and a controller. The controller is used to control the grouting machine (3) to stop injecting grout when the real-time data of the pressure sensor (5) exceeds the preset value.

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