Road tunnel drainage pipeline backwashing device and method

Abstract

The application discloses a highway tunnel drainage pipeline backwashing device and method, and belongs to the technical field of highway tunnels; the device comprises a moving head arranged in the lumen of a main drainage pipe; a suction device is arranged on the moving head; the suction device is in communication with the inlet and outlet of the backwashing device; the backwashing device introduces a cleaning blocking agent to the suction device; the moving head is connected with a driving mechanism; when the moving head is driven to reciprocate along the main drainage pipe by the driving mechanism, the sealing mechanism on the moving head is connected to implement the blocking and sealing of the lumen of the main drainage pipe; the suction device comprises a suction pipe; a suction head is arranged at one end of the suction pipe; a plurality of groups of suction heads are arranged at intervals in the circumferential direction of the suction pipe; the suction head slot is directed to the inner wall of the main drainage pipe; and the suction head slot walls on the two sides of the suction head abut against or are separated from the inner wall of the main drainage pipe. Through the above arrangement, the problem of blockage of gaps between components in the waterproof and drainage system can be effectively avoided, the safety of the entire drainage system of the public road tunnel is ensured, the service life of the tunnel is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of highway tunnel technology, and more specifically, to a backwashing device and method for highway tunnel drainage pipes. Background Technology

[0002] Due to the complex geological conditions of the surrounding rock in highway tunnels traversing mountainous areas, after a certain period of use, water leakage problems such as lining seepage may occur. In severe cases, this can lead to blockage of the tunnel drainage system, resulting in a large amount of water accumulating behind the lining and being unable to drain. This increases the water pressure behind the lining and threatens the safety and stability of the lining structure.

[0003] Extensive engineering surveys and experimental studies have shown that the blockage of tunnel drainage systems is mainly caused by two factors: First, the groundwater behind the tunnel lining contains a large amount of calcium, magnesium, and iron ions. These free calcium, magnesium, and iron ions react chemically with residual hydrochloric acid ions in the drainage system to form various water-insoluble solids, leading to blockage. Second, the groundwater behind the lining carries a large amount of silt and rock debris when it flows, which cannot be effectively discharged after entering the drainage system, causing blockage. To prevent highway tunnels from being damaged by water, the system that intercepts and diverts surface water and groundwater in the tunnel lining and roadbed is called the tunnel anti-clogging drainage system. The drainage system is directly related to the quality of the tunnel lining, the strength of the roadbed, and the quality of the road surface. Currently, after many years of operation, highway tunnels often experience lining leakage and blockage of the roadbed drainage system, making maintenance difficult.

[0004] Chinese patent document application number 202110314992.5 discloses a visual and maintainable anti-clogging drainage system for highway tunnels, designed to solve the problems of easy clogging and seepage in existing tunnel drainage systems, and difficulty in locating clogging points. This visual and maintainable anti-clogging drainage system for highway tunnels includes a road surface drainage system, a side ditch wellpoint dewatering system, and a sidewall visual drainage system. The road surface drainage system includes curved drainage blind pipes, transverse drainage blind ditches, longitudinal drainage blind pipes, longitudinal drainage blind ditches, visual wells, and visual covers. The side ditch wellpoint dewatering system includes side ditches and dewatering wells, with the dewatering wells installed within the side ditches. The sidewall visual drainage system includes sidewall blind ditches, sidewall drain pipes, combined permeable pipes, and visual water collection boxes, with the sidewall blind ditches located inside the tunnel sidewalls.

[0005] In the above-mentioned patented solutions, by setting up various drainage blind ditches and blind pipes and installing a visual monitoring system inside, although the blockage at each drainage point can be monitored, the blockage points still cannot be easily cleaned, resulting in significant problems in the actual tunnel maintenance process. Summary of the Invention

[0006] To address the problem of existing highway tunnel drainage systems being prone to clogging and difficult to clean, this solution provides a backwashing device for highway tunnel drainage pipes. Using this device to clean the highway tunnel drainage system can effectively prevent clogging between components in the drainage system, ensure the safety of the entire drainage system of the public road tunnel, improve the service life of the tunnel, and reduce maintenance costs.

[0007] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0008] A backwashing device for drainage pipes in highway tunnels according to the present invention includes:

[0009] A movable head is installed inside the main drain pipe cavity. The movable head is equipped with a suction device, which is connected to the inlet and outlet of the backwashing device. The backwashing device introduces a cleaning blocking agent into the suction device. The movable head is connected to a drive mechanism. When the movable head is driven by the drive mechanism to move back and forth along the main drain pipe, it also activates the sealing mechanism on the movable head to isolate and seal the main drain pipe cavity.

[0010] The suction device includes a suction pipe with a suction head at one end. Multiple suction heads are spaced apart along the circumference of the suction pipe. The groove of the suction head points towards the inner wall of the main drain pipe, and the groove walls on both sides of the suction head are either abutting or separated from the inner wall of the main drain pipe.

[0011] Furthermore, a connecting pipe is provided at the bottom of the suction head groove, the opening of the connecting pipe and the outer wall of the suction pipe are in sliding fit, and a telescopic spring is sleeved on the connecting pipe.

[0012] Furthermore, the moving head is connected to the rotating mechanism. When the driving mechanism drives the moving head to move back and forth along the main drain pipe, the moving head rotates along the cavity of the main drain pipe. The adjacent suction pipes are connected by a sealing pipe. The rotating mechanism includes a rotating lever set on the outer wall of the sealing pipe, and a spiral groove is set on the inner wall of the adjacent suction pipe. The rotating lever extends into the spiral groove.

[0013] Furthermore, the sealing mechanism includes a flexible sealing sleeve fitted on the outer wall of the suction tube. One end of the flexible sealing sleeve is fixed to the outer wall of the suction tube, and the other end of the flexible sealing sleeve slides in fit with the outer wall of the suction tube. The flexible sealing sleeve is connected to a driving mechanism, which drives one end of the flexible sealing sleeve to slide along the suction tube and causes the outer wall of the flexible sealing sleeve to expand. The expanded outer wall of the flexible sealing sleeve forms a compression fit with the inner wall of the main drain pipe.

[0014] Furthermore, the flexible sealing sleeve includes an annular protrusion for abutting against the inner wall of the main drain pipe. The inner cavity of the flexible sealing sleeve is provided with an expansion arc-shaped strip arranged in the circumferential direction of the inner cavity of the annular protrusion. An insertion rod is provided in the middle section of the expansion arc-shaped strip. An expansion spring is provided on the insertion rod. One end of the expansion spring is connected to a lifting rod. The lifting rod is rotatably mounted on the expansion bracket. A lifting roller is provided on the lifting rod. The lifting roller and the lifting baffle form abutting cooperation. One end of the lifting baffle is fixedly connected to the outer wall of the suction pipe.

[0015] Furthermore, a first connecting plate and a second connecting plate are respectively provided at both ends of the flexible sealing sleeve. The first connecting plate is fixed to the outer wall of the suction tube, and the second connecting plate is in sliding fit with the outer wall of the suction tube.

[0016] Furthermore, the driving mechanism includes a first driving steel wire disposed on the second connecting plate. The first driving steel wire passes through the flexible sealing sleeve and the first connecting plate, and one end is connected to the surface of the connecting rotating plate. The other side of the connecting rotating plate is connected to the pulling steel wire. The pulling steel wire abuts against the pulling wheel. The pulling steel wire and the first driving steel wire are arranged perpendicularly. The pulling steel wire extends out of the main drain pipe and is connected to the stranding roller. The stranding roller is rotatably disposed on the stranding bracket. A driving gear is disposed at one end of the stranding roller extending out of the stranding bracket. The driving gear meshes with the driving rack. The driving rack is connected to the push head.

[0017] Furthermore, a return wire is also provided on the second connecting plate. One end of the return wire is connected to the surface of the rotating plate, and the other side of the rotating plate is connected to the second drive wire. The second drive wire abuts against the return wire wheel. The second drive wire extends out of the main drain pipe and is connected to the return wire roller. The return wire roller is rotatably mounted on the stranded wire support. A return gear is provided at one end of the return wire roller that extends out of the stranded wire support. The return gear meshes with the drive rack.

[0018] Furthermore, a guide slide rod is provided on the first connecting plate. The guide slide rod is arranged along the length of the suction tube and forms a sliding guide engagement with the fixed support plate. A return spring is sleeved on the guide slide rod.

[0019] The present invention provides a method for backwashing drainage pipes in highway tunnels, utilizing the highway tunnel drainage pipe backwashing device described above, comprising:

[0020] The backwashing device introduces a cleaning blocker into the suction device to clean the water-insoluble solids in the drainage system where the main drain pipe (100) is located. After cleaning, the cleaning sludge and solid particle impurities are sucked out of the entire main drain pipe by the suction device.

[0021] Compared with the prior art, the technical solution provided by this invention has the following advantages:

[0022] In practical application, the backwashing device of this invention uses a main drain pipe installed inside a tunnel. Multiple moving heads are spaced along the length of the main drain pipe, and suction devices are mounted on each moving head. A sealing mechanism seals the main drain pipe cavity, and sealing mechanisms on adjacent moving heads divide the main drain pipe into multiple independent cavity regions. The backwashing device introduces a cleaning blocking agent into the suction device, effectively cleaning water-insoluble solids within the drainage system containing the main drain pipe.

[0023] After cleaning, the sludge and solid particles are sucked out of the main drain pipe using a suction device, ensuring the cleanliness of the entire system. This backflushing device effectively prevents clogging between components in the drainage system, effectively clearing blockages, ensuring the safety of the entire drainage system in the public road tunnel, extending the tunnel's service life, and reducing maintenance costs. Attached Figure Description

[0024] Figure 1 This is a cross-sectional schematic diagram of the backwashing device for the drainage pipes in a highway tunnel located inside the tunnel.

[0025] Figure 2 This is a schematic diagram of a portion of the backwashing device for a highway tunnel drainage pipe located inside the main drainage pipe.

[0026] Figure 3 This is a plan view of the backwashing device for the drainage pipe of a highway tunnel located inside the main drainage pipe.

[0027] Figure 4 This is a front view of the backwashing device for drainage pipes in highway tunnels;

[0028] Figure 5 and Figure 6 These are schematic diagrams of the backwashing device for drainage pipes in highway tunnels from two different perspectives.

[0029] Figure 7 and Figure 8 These are schematic diagrams of the cross-sectional structure of a backwashing device for drainage pipes in highway tunnels from two different perspectives.

[0030] Figure 9 and Figure 10 yes Figure 7 or Figure 8 Two perspectives illustrating the cross-sectional structure of the front-end structure of the backwashing device for drainage pipes in a highway tunnel.

[0031] Figure 11 yes Figure 7 or Figure 8 A cross-sectional structural diagram of another part of the backwashing device for drainage pipes in the China-Gonglu Tunnel.

[0032] Figure 12 yes Figure 11 Enlarged schematic diagram of section A of the structure;

[0033] Figure 13 This is the front view of the adjacent suction tubes forming a plug-in connection.

[0034] Label Explanation:

[0035] 100. Main drain pipe;

[0036] 200. Moving head;

[0037] 300. Suction tube; 310. Suction head; 311. Contact rubber strip; 312. Connecting tube; 313. Telescopic spring; 314. Cap; 320. Sealing tube; 321. Rotary lever; 330. Spiral groove;

[0038] 400. Flexible sealing sleeve; 410. Annular protrusion; 420. Expansion arc strip; 421. Expansion spring; 422. Hook rod; 4221. Lifting roller; 4222. Lifting folding plate; 430. First connecting plate; 431. Guide slide rod; 432. Return spring; 440. Second connecting plate; 441. Retracting wire; 442. Retracting sheave; 443. Retracting gear; 444. Rotating disk; 445. Second driving wire; 446. Retracting roller; 450. First driving wire; 451. Connecting rotating disk; 452. Pulling wire; 453. Pulling sheave; 454. Stranding roller; 455. Stranding bracket; 456. Drive gear; 457. Drive rack; 460. Fixed bracket plate. Detailed Implementation

[0039] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments.

[0040] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the invention. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0041] like Figure 1 , Figure 5-8As shown, an embodiment of the present invention provides a backwashing device for a highway tunnel drainage pipe, comprising:

[0042] A movable head 200 is installed inside the cavity of the main drain pipe 100. Multiple movable heads are spaced apart along the length of the main drain pipe. A suction device is installed on the movable head 200. The suction device is connected to the inlet and outlet of the backwashing device. The backwashing device introduces a cleaning blocking agent into the suction device. The movable head 200 is connected to a drive mechanism. When the movable head 200 is driven by the drive mechanism to move back and forth along the main drain pipe 100, it also activates the sealing mechanism on the movable head 200 to isolate and seal the cavity of the main drain pipe 100.

[0043] The tunnel drainage system adopts a traditional approach, with drainage strips installed between the secondary linings of the highway tunnel. Drainage blind pipes are installed between the drainage strips and the inner wall of the tunnel, with multiple sets of blind pipes spaced at intervals along the circumference of the inner wall. These blind pipes effectively absorb water flow from the inner wall of the tunnel, guiding the water generated within the tunnel into the main drainage pipe 100. Water discharged from the drainage strips is also discharged into the main drainage pipe 100, thus achieving comprehensive water collection throughout the tunnel.

[0044] In practical application, the backwashing device uses a main drain pipe 100 installed inside the tunnel. Multiple moving heads 200 are spaced apart within the main drain pipe 100. Suction devices are installed on the moving heads 200, and a sealing mechanism is used to seal the cavity of the main drain pipe 100. Sealing mechanisms on adjacent moving heads 200 divide the main drain pipe 100 into multiple independent cavity areas.

[0045] The backflushing device introduces a cleaning and blocking agent into the suction equipment, effectively cleaning water-insoluble solids within the drainage system containing the main drain pipe 100. After cleaning, the cleaned sludge and solid particles are suctioned out of the entire main drain pipe, ensuring the cleanliness of the entire system. This backflushing device performs backflushing on blocked areas, effectively preventing clogging between components in the drainage system, achieving effective blockage removal, ensuring the safety of the entire drainage system of the public road tunnel, extending the tunnel's service life, and reducing maintenance costs.

[0046] Blocking agents can be of various types, including natural polymer blocking agents, phosphorus-containing descaling agents, and copolymer blocking agents, as long as they can effectively eliminate various polymers. The blocking agent forms soluble polymers with calcium and magnesium ions in the drainage system, preventing precipitates from agglomerating and forming large-volume deposits, thus ensuring the stable operation of the entire drainage system.

[0047] The backwashing device can clean and pump the main drainage pipe 100 at any time according to the actual use of the tunnel. Depending on the geological conditions of the tunnel, the regular interval is half a month. It can effectively clean and pump out sand, sludge and solid particulate impurities in the main drainage pipe 100.

[0048] When the moving head 200 is driven, the drive mechanism drives the moving head 200 to move back and forth along the main drain pipe 100, so that the suction device on the moving head 200 can effectively contact the sludge and solid particulate impurities at multiple locations in the main drain pipe 100 and perform suction.

[0049] When the moving head 200 moves along the length of the main drain pipe 100 and the linkage sealing mechanism performs the isolation and sealing of the main drain pipe 100, the main drain pipe 100 is divided into multiple independent drainage spaces.

[0050] By introducing a cleaning and blocking agent into the suction equipment through a backwashing device, the drainage system in each gap within an independent area can be cleaned, ensuring the ion reaction cleaning of the entire drainage system and ensuring its continuity. After cleaning, the suction equipment removes the sludge and reacted impurities from the main drain pipe 100, ensuring the cleanliness of the main drain pipe 100.

[0051] When performing suction or removal of blocking agent in the main drain pipe 100, the suction equipment includes a suction pipe 300, a suction head 310 is provided at one end of the suction pipe 300, multiple sets of suction heads 310 are arranged at intervals along the circumferential direction of the suction pipe 300, the suction head 310 is shaped like a groove plate and the groove opening points to the inner wall of the main drain pipe 100, and contact rubber strips 311 are provided on both sides of the groove wall of the suction head 310. The contact rubber strips 311 are arranged along the length of the suction pipe 300 and abut against or separate from the inner wall of the main drain pipe 100.

[0052] When the suction head 310 is actually used for suction, the contact rubber strips 311 on both sides of the suction head 310 abut against the inner wall of the main drain pipe 100. The suction head 310 approaches the impurities deposited on the inner wall of the main drain pipe 100 and performs suction to ensure the cleaning effect of the impurities deposited in the inner cavity of the main drain pipe 100.

[0053] When the suction head 310 comes into contact with the inner wall of the main drain pipe 100, a cleaning and blocking agent is introduced into the main drain pipe 100 through the backwashing device to flush the impurities deposited between the aforementioned blind drain pipe and the drain belt and tunnel, thereby ensuring the cleanliness of the gaps in the entire drainage system and ensuring the normal flow of water.

[0054] Because the main drainage pipe 100 is embedded in the tunnel, it is impossible to ensure that the drainage pipe 100 is in a straight position. During actual use of the tunnel, the main drainage pipe 100 is subject to compression and deformation.

[0055] In this regard, such as Figure 8-10 As shown, in order to ensure that the suction head 310 can pass through the main drain pipe 100 normally and to ensure that the suction head 310 can effectively suck up the impurities and sludge deposited in the main drain pipe 100, a connecting pipe 312 is provided at the bottom of the suction head 310. The opening of the connecting pipe 312 is in sliding fit with the outer wall of the suction pipe 300. A telescopic spring 313 is sleeved on the connecting pipe 312. The two ends of the telescopic spring 313 abut against the outer wall of the suction head 310 and the main drain pipe 100, respectively. A cap 314 is provided at one end of the suction head 310.

[0056] In practical applications, the suction head 310 slides into the outer wall of the suction pipe 300 through the opening of the connecting pipe 312, and a cap 314 is provided at one end of the suction head 310, so that the suction head 310 can effectively push the impurities deposited in the main drain pipe 100 to one end of the main drain pipe 100. Through the suction head 310, the impurities pushed to one end can be reliably sucked up, ensuring the cleanliness of the entire system.

[0057] In this embodiment, as Figure 13 As shown, the moving head 200 is connected to the rotating mechanism. When the driving mechanism drives the moving head 200 to move back and forth along the main drain pipe 100, the moving head 200 rotates along the cavity of the main drain pipe 100. Adjacent suction pipes 300 are connected by a sealing pipe 320. The rotating mechanism includes a rotating lever 321 set on the outer wall of the sealing pipe 320. A spiral groove 330 is set on the inner wall of the adjacent suction pipe 300, and the rotating lever 321 extends into the spiral groove 330.

[0058] In practical applications, since the main drainage pipe 100 can be arranged along the length of the tunnel, when adjacent moving heads 200 move along the length of the main drainage pipe 100, adjacent suction pipes 300 form an insertion fit. One end of the adjacent suction pipe 300 is provided with a sealing pipe 320, which is inserted into the cavity of the suction pipe 300 and the outer wall forms a sliding fit.

[0059] The suction pipes 300 used for suction operations within adjacent moving heads 200 are sequentially connected via sealing pipes 320. This allows multiple sets of pipes spaced along the length of the main drain pipe 100 to form multiple suction units and segmentation units, dividing the drainage unit along the length of the main drain pipe 100 into multiple sub-units. This facilitates suction operations while effectively cleaning and suctioning impurities deposited within multiple sub-units.

[0060] Adjacent suction pipes 300 are sequentially connected via sealing pipes 320, effectively forming a main pipe from multiple suction pipes 300 within the main drain pipe 100. The suction pipe head of the backwashing equipment is connected to the suction pipe 300, enabling effective suction operations or the introduction of blocking agents.

[0061] To ensure effective cleaning and suction of the entire main drain pipe 100, the moving head 200 rotates along the length of the main drain pipe 100 as it moves along the pipe's longitudinal direction, thus cleaning any continuously accumulated sediment within the main drain pipe 100. As the moving head 200 moves and rotates along the length of the main drain pipe 100, it pushes the cleaned sediment to one end of each independent space within the main drain pipe 100, effectively suctioning the sediment at that end and ensuring the overall cleanliness of the main drain pipe 100.

[0062] To implement the isolation of the main drain pipe 100 cavity, such as Figure 11 , 12 As shown, the sealing mechanism includes a flexible sealing sleeve 400 sleeved on the outer wall of the suction tube 300. One end of the flexible sealing sleeve 400 is fixed to the outer wall of the suction tube 300, and the other end of the flexible sealing sleeve 400 is slidably engaged with the outer wall of the suction tube 300. The flexible sealing sleeve 400 is connected to a driving mechanism. The driving mechanism drives one end of the flexible sealing sleeve 400 to slide along the suction tube 300 and causes the outer wall of the flexible sealing sleeve 400 to expand. The expanded outer wall of the flexible sealing sleeve 400 forms a compression fit with the inner wall of the main drain pipe 100.

[0063] When the main drain pipe 100 is blocked, the drive mechanism drives the other end of the flexible sealing sleeve 400 to slide along the suction pipe 300 and cause the outer wall of the flexible sealing sleeve 400 to expand. This expansion causes the outer wall of the flexible sealing sleeve 400 to expand and form a compression fit with the inner wall of the main drain pipe 100, thereby blocking the main drain pipe 100. The adjacent flexible sealing sleeves 400 divide the entire main drain pipe 100 into multiple independent areas, thus dividing the drainage system into multiple independent spaces and ensuring that the entire drainage system is divided into multiple independent areas.

[0064] When expanding the flexible sealing sleeve 400, the sealing effect on the main drain pipe 100 is ensured. When introducing the pressure-blocking agent into the suction pipe 300, the pressure-blocking agent can be effectively introduced into the gaps of various components in the drainage system. The flexible sealing sleeve 400 has two sets of annular protrusions 410 along its length, which are spaced apart. When the two sets of annular protrusions 410 abut against the inner wall of the main drain pipe 100, they seal and isolate the main drain pipe 100 into a closed pipe space.

[0065] A drain pipe is installed on the main drain pipe 100 to lead the drain pipe into the drainage ditch for drainage. Two sets of annular protrusions 410 are set in the area between the drain pipe and the main drain pipe 100, which can effectively block the drain pipe, thereby cutting off the independent unit of the drainage system from the drain pipe, so as to ensure the cleaning effect of each component in the drainage system.

[0066] To ensure the sealing effect of the entire flexible sealing sleeve 400 on the inner wall of the main drain pipe 100, an expansion arc strip 420 is provided in the inner cavity of the flexible sealing sleeve 400. Multiple sets of expansion arc strips 420 are arranged at intervals along the circumferential direction of the inner cavity wall of the two sets of annular protrusions 410. An insert rod is provided in the middle section of each expansion arc strip 420, and an expansion spring 421 is provided on the insert rod. One end of the expansion spring 421 is connected to a lifting rod 422. The lifting rod 422 is rotatably mounted on the expansion bracket. A lifting roller 4221 is provided on the lifting rod 422. The lifting roller 4221 and the lifting baffle 4222 form abutment cooperation. One end of the lifting baffle 4222 is fixedly connected to the outer wall of the suction pipe 300.

[0067] When the two sets of annular protrusions 410 of the flexible sealing sleeve 400 are expanded, the driving mechanism drives the other end of the flexible sealing sleeve 400 to slide along the suction pipe 300 and expand the outer wall of the flexible sealing sleeve 400. This causes the lifting roller 4221 to abut against the lifting baffle 4222, so that the lifting rod 422 drives the expansion arc strip 420 to abut against the inner cavity of the two sets of annular protrusions 410, thereby expanding the two sets of annular protrusions 410. The expansion operation of multiple expansion arc strips 420 enables the two sets of annular protrusions 410 to adapt to the sealing operation of the deformed inner wall of the main drain pipe 100.

[0068] To enable the installation and connection of the flexible sealing sleeve 400, a first connecting plate 430 and a second connecting plate 440 are respectively provided at both ends of the flexible sealing sleeve 400. The first connecting plate 430 is fixed to the outer wall of the suction tube 300, and the second connecting plate 440 is in sliding fit with the outer wall of the suction tube 300.

[0069] When implementing the driving of the moving head 200, such as Figure 2-4As shown, the drive mechanism includes a first drive wire 450 mounted on a second connecting disc 440. The first drive wire 450 passes through a flexible sealing sleeve 400 and a first connecting disc 430, with one end connected to one side of a connecting rotating disc 451. The other side of the connecting rotating disc 451 is connected to a pulling wire 452, which abuts against a pulling reel 453. The pulling wire 452 is arranged perpendicularly to the first drive wire 450. The pulling wire 452 extends out of the main drain pipe 100 and connects to a stranding roller 454. The stranding roller 454 is rotatably mounted on a stranding bracket 455. A drive gear 456 is mounted at one end of the stranding roller 454 extending out of the stranding bracket 455. The drive gear 456 meshes with a drive rack 457, which is connected to a push head.

[0070] Correspondingly, a return wire 441 is also provided on the second connecting plate 440. One end of the return wire 441 is connected to one side of the rotating plate 444, and the other side of the rotating plate 444 is connected to the second driving wire 445. The second driving wire 445 abuts against the return wire wheel 442. The second driving wire 445 extends out of the main drain pipe 100 and is connected to the return wire roller 446. The return wire roller 446 is rotatably mounted on the stranded wire bracket 455. A return gear 443 is provided at one end of the return wire roller 446 that extends out of the stranded wire bracket 455. The return gear 443 meshes with the drive rack 457.

[0071] When driving the moving head 200, a drive cylinder is installed on the drive rack 457. The drive cylinder drives the drive rack 457 to move along the length of the drainage ditch, thereby rotating the drive gear 456 and the return gear 443, and rotating the stranding roller 454 and the return roller 446, so as to loosen the return wire 441 and tighten the pulling wire 452, thereby driving the moving head 200.

[0072] When the moving head 200 retracts along the main drain pipe 100, the drive cylinder drives the drive rack 457 to move in the opposite direction along the length of the drain ditch, thereby rotating the drive gear 456 and the retraction gear 443, and rotating the stranding roller 454 and the retraction roller 446, so as to tighten the retraction wire 441 and loosen the pulling wire 452, thereby driving the moving head 200 in the opposite direction and moving the moving head 200 in the opposite direction.

[0073] Furthermore, when driving the moving head 200, a guide slide rod 431 is provided on the first connecting plate 430. The guide slide rod 431 is arranged along the length of the suction tube 300 and forms a sliding guide engagement with the fixed support plate 460. A return spring 432 is sleeved on the guide slide rod 431, and the two ends of the return spring 432 abut against the first connecting plate 430 and the fixed support plate 460, respectively.

[0074] The first connecting plate 430 is provided with a guide slide rod 431, which abuts against the first connecting plate 430 and the fixed bracket plate 460 through a return spring 432. Thus, the return spring 432 realizes the reset of the flexible sealing sleeve 400 and the entire moving head 200, ensuring the effectiveness of this reset.

[0075] This invention also provides a method for backwashing drainage pipes in highway tunnels, which utilizes the aforementioned backwashing device for highway tunnel drainage pipes to backwash the drainage pipes, including:

[0076] The backwashing device introduces a cleaning blocker into the suction equipment to clean the water-insoluble solids in the drainage system where the main drain pipe 100 is located. After cleaning, the cleaning sludge and solid particulate impurities are sucked out of the entire main drain pipe by the suction equipment. The structure and function of each component of the backwashing device have been fully explained in the above description, and will not be repeated here.

[0077] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A backwashing device for drainage pipes in highway tunnels, comprising: A movable head (200) is installed inside the main drain pipe (100). A suction device is installed on the movable head (200). The suction device is connected to the inlet and outlet of the backwashing device. The backwashing device introduces a cleaning blocking agent into the suction device. The movable head (200) is connected to a drive mechanism. When the movable head (200) is driven by the drive mechanism to move back and forth along the main drain pipe (100), the sealing mechanism on the movable head (200) is activated to isolate and seal the main drain pipe (100) cavity. The feature is that the suction device includes a suction pipe (300), a suction head (310) is provided at one end of the suction pipe (300), multiple sets of suction heads (310) are arranged at intervals along the circumferential direction of the suction pipe (300), the groove of the suction head (310) points to the inner wall of the main drain pipe (100), and the groove walls on both sides of the suction head (310) abut against or separate from the inner wall of the main drain pipe (100).

2. The backwashing device for highway tunnel drainage pipes according to claim 1, characterized in that, The suction head (310) has a connecting pipe (312) at the bottom of the groove. The opening of the connecting pipe (312) and the outer wall of the suction pipe (300) are in sliding fit. A telescopic spring (313) is sleeved on the connecting pipe (312).

3. The backwashing device for highway tunnel drainage pipes according to claim 1, characterized in that, The moving head (200) is connected to the rotating mechanism. When the driving mechanism drives the moving head (200) to move back and forth along the main drain pipe (100), the moving head (200) rotates along the cavity of the main drain pipe (100). The adjacent suction pipes (300) are connected by a sealing pipe (320). The rotating mechanism includes a rotating lever (321) set on the outer wall of the sealing pipe (320). The inner wall of the adjacent suction pipes (300) is provided with a spiral groove (330). The rotating lever (321) extends into the spiral groove (330).

4. The backwashing device for highway tunnel drainage pipes according to claim 1, characterized in that, The sealing mechanism includes a flexible sealing sleeve (400) sleeved on the outer wall of the suction tube (300). One end of the flexible sealing sleeve (400) is fixed to the outer wall of the suction tube (300), and the other end of the flexible sealing sleeve (400) slides in fit with the outer wall of the suction tube (300). The flexible sealing sleeve (400) is connected to a driving mechanism. The driving mechanism drives one end of the flexible sealing sleeve (400) to slide along the suction tube (300) and causes the outer wall of the flexible sealing sleeve (400) to expand. The expanded outer wall of the flexible sealing sleeve (400) forms a compression fit with the inner wall of the main drain pipe (100).

5. The backwashing device for highway tunnel drainage pipes according to claim 4, characterized in that, The flexible sealing sleeve (400) includes an annular protrusion (410) for abutting against the inner wall of the main drain pipe (100). The inner cavity of the flexible sealing sleeve (400) is provided with an expansion arc strip (420) arranged in the circumferential direction of the inner cavity of the annular protrusion (410). An insert rod is provided in the middle section of the expansion arc strip (420). An expansion spring (421) is provided on the insert rod. One end of the expansion spring (421) is connected to a lifting rod (422). The lifting rod (422) is rotatably mounted on the expansion bracket. A lifting roller (4221) is provided on the lifting rod (422). The lifting roller (4221) and the lifting baffle (4222) form abutting cooperation. One end of the lifting baffle (4222) is fixedly connected to the outer wall of the suction pipe (300).

6. The backwashing device for highway tunnel drainage pipes according to claim 4, characterized in that, The flexible sealing sleeve (400) is provided with a first connecting plate (430) and a second connecting plate (440) at both ends. The first connecting plate (430) is fixed to the outer wall of the suction tube (300), and the second connecting plate (440) is in sliding fit with the outer wall of the suction tube (300).

7. The backwashing device for highway tunnel drainage pipes according to claim 6, characterized in that, The driving mechanism includes a first driving wire (450) disposed on a second connecting plate (440). The first driving wire (450) passes through a flexible sealing sleeve (400) and a first connecting plate (430) and one end is connected to the surface of a connecting rotating plate (451). The other side of the connecting rotating plate (451) is connected to a pulling wire (452). The pulling wire (452) abuts against a pulling wheel (453). The pulling wire (452) and the first driving wire (450) are arranged perpendicularly. The pulling wire (452) extends out of the main drain pipe (100) and is connected to a stranding roller (454). The stranding roller (454) is rotatably disposed on a stranding bracket (455). A driving gear (456) is disposed at one end of the stranding roller (454) extending out of the stranding bracket (455). The driving gear (456) meshes with a driving rack (457). The driving rack (457) is connected to a push head.

8. The backwashing device for highway tunnel drainage pipes according to claim 6, characterized in that, The second connecting plate (440) is also provided with a return wire (441). One end of the return wire (441) is connected to the surface of the rotating plate (444), and the other side of the rotating plate (444) is connected to the second driving wire (445). The second driving wire (445) abuts against the return wire wheel (442). The second driving wire (445) extends out of the main drain pipe (100) and is connected to the return wire roller (446). The return wire roller (446) is rotatably mounted on the stranded wire bracket (455). One end of the return wire roller (446) extending out of the stranded wire bracket (455) is provided with a return gear (443). The return gear (443) meshes with the drive rack (457).

9. The backwashing device for highway tunnel drainage pipes according to claim 6, characterized in that, A guide slide rod (431) is provided on the first connecting plate (430). The guide slide rod (431) is arranged along the length of the suction tube (300) and forms a sliding guide engagement with the fixed support plate (460). A return spring (432) is sleeved on the guide slide rod (431).

10. A method for backwashing a highway tunnel drainage pipe using the backwashing device as described in any one of claims 1-9, characterized in that, include: The backwashing device introduces a cleaning blocker into the suction device to clean the water-insoluble solids in the drainage system where the main drain pipe (100) is located. After cleaning, the cleaning sludge and solid particle impurities are sucked out of the entire main drain pipe by the suction device.

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