A device and method for preventing crystallization of blind drainage pipes in tunnels during operation

Abstract

The present invention discloses a device for preventing crystallization of blind drainage pipes in tunnels during operation. The tunnel includes an initial support and a secondary lining from outside to inside. The blind drainage pipe is arranged at the junction of the initial support and the secondary lining at the bottom of the tunnel along the length direction of the tunnel, and includes an outer support pipe, an inner pipe, a medicine spraying assembly, and a medicine changing assembly. The secondary lining is provided with an inclined hole inclined outward and downward, and the lower end of the inclined hole is connected to the blind drainage pipe. The outer support pipe is arranged in the inclined hole, and the inner pipe is arranged in the outer support pipe. The medicine spraying assembly and the medicine changing assembly are arranged in sequence from top to bottom in the inner pipe. The present invention also discloses a method for preventing crystallization of blind drainage pipes in tunnels during operation. Compared with the prior art, the technical solution of the present invention realizes automatic medicine addition into the mesh cage, saves manpower, and has the advantages of accurate medicine addition time and accurate medicine addition amount.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel engineering, and in particular to a device and method for preventing crystallization of blind drainage pipes in tunnels during operation. Background Art

[0002] With the continuous development of social economy and the continuous advancement of highway construction, my country's tunnel engineering has made great progress and construction. At present, the number and mileage of tunnels have ranked first in the world. However, due to factors such as design level, construction quality, material quality, geological conditions and operating environment, a large number of tunnels have different degrees of damage after being put into operation, and tunnel water damage is often the cause of other damage. The drainage performance of the tunnel drainage system is reduced or even fails after severe crystallization. Therefore, the discussion, research and treatment of tunnel crystallization problems are increasingly valued by practitioners.

[0003] A large number of experimental studies have found that the main component of crystallization in tunnel drainage systems is calcium carbonate crystals. Water from surrounding rock fissures enters the tunnel drainage system from the surrounding rock through the primary branch, bringing calcium ions from the surrounding rock and the primary branch. In an alkaline environment, it reacts with carbonate ions to precipitate calcium carbonate crystals, blocking the drainage pipes. Based on these studies, current solutions mostly focus on descaling and scale prevention, among which chemical agents are a commonly used descaling technology. However, since the tunnel drainage blind pipe is covered by the secondary lining, how to inject chemicals into the drainage blind pipe still needs to be studied. Therefore, in view of the current situation, it is urgent to develop a spraying device for injecting chemicals into the drainage blind pipe to prevent crystallization in the blind pipe. Summary of the invention

[0004] In order to solve the above technical problems, the main purpose of the present invention is to provide a device and method for preventing crystallization of blind drainage pipes in tunnels during operation, so as to solve the problem of crystallization in blind drainage pipes and blockage of blind drainage pipes.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions to solve it.

[0006] (1) A device for preventing crystallization of blind drainage pipes in tunnels during operation, wherein the tunnel comprises primary support and secondary lining from outside to inside, and the blind drainage pipe is arranged at the junction of the primary support and the secondary lining at the bottom of the tunnel along the length direction of the tunnel, and comprises an outer support pipe, an inner pipe, a drug spraying assembly, and a drug replacement assembly;

[0007] The secondary lining is provided with an inclined hole inclined outward and downward, the lower end of the inclined hole is connected to a drainage blind pipe, the outer support pipe is arranged in the inclined hole, the inner pipe is arranged in the outer support pipe, and the medicine spraying assembly and the medicine changing assembly are arranged in sequence from top to bottom in the inner pipe.

[0008] Furthermore, it also includes a controller; the spraying assembly includes a fixed circular plate arranged in the middle position of the inner tube, the fixed circular plate is provided with a fixed plate fan-shaped notch, a first motor is fixedly connected to the inner wall of the inner tube below the fixed circular plate, a movable circular plate is connected to the output shaft of the first motor, the movable circular plate is provided with a movable plate fan-shaped notch, and the movable circular plate is arranged closely below the fixed circular plate; the first motor is electrically connected to the controller.

[0009] Furthermore, the output shaft of the first motor passes through the center of the fixed circular plate and is connected to a stirring shovel.

[0010] Furthermore, the dressing changing assembly comprises a cylindrical mesh cage, the upper and lower ends of the mesh cage are connected, the mesh cage is connected to the lower end of the inner tube, and the lower end of the mesh cage is in contact with the bottom of the drainage blind pipe.

[0011] Furthermore, it also includes a medicine control component, which is arranged in the inner tube between the medicine spraying component and the medicine changing component; the medicine control component includes a collecting hopper, which is a cylindrical shell with an upper opening, and the bottom of the collecting hopper is hinged with a medicine leakage plate that can be rotated downward to open, and a first electric push rod is arranged on the inner wall of the inner tube below the collecting hopper, the shell of the first electric push rod is hinged to the inner wall of the inner tube, and the upper end of the piston rod of the first electric push rod is hinged to the lower surface of the medicine leakage plate; the first electric push rod is electrically connected to the controller.

[0012] Furthermore, a weighing sensor is provided on the medicine leakage plate, and the weighing sensor is electrically connected to the controller.

[0013] Furthermore, the gap between the inclined hole near the lower end and the outer supporting tube is filled with water-swellable waterproofing glue, and the gap between the inclined hole in the remaining part and the outer supporting tube is filled with waterproof mortar.

[0014] Furthermore, an inner tube cover is provided at the upper end of the inner tube, and an outer cover plate is provided at the upper end of the outer support tube.

[0015] Furthermore, the inner wall of the outer support tube is provided with a first axial guide groove, and the outer wall of the inner tube is provided with a first sliding block matching the guide groove.

[0016] Furthermore, a second guide groove is provided on the inner wall of the inner tube, a second slider matching the second guide groove is provided on the outer wall of the mesh cage, a second electric push rod is provided on the inner wall of the inner tube, and a piston rod of the second electric push rod is connected to the inner wall of the mesh cage; the second electric push rod is electrically connected to the controller.

[0017] (II) A method for preventing crystallization of blind drainage pipes in tunnels during operation, comprising the following steps:

[0018] Step 1: Install the outer support pipe in the inclined hole of the secondary lining, fill the gap between the inclined hole near the lower end and the outer support pipe with water-swelling waterproof glue, and fill the gap between the inclined hole and the outer support pipe in the remaining part with waterproof mortar;

[0019] Step 2: Place the inner tube containing the spraying component, the control component and the changing component into the outer support tube;

[0020] Step 3, opening the outer cover plate and the inner tube cover in sequence, and putting the anti-crystallization drug into the inner tube;

[0021] Step 4: The medicine spraying component starts the first motor according to the controller program, drives the movable circular plate to rotate, and releases the medicine to the medicine controlling component. The medicine controlling component controls the movement of the first electric push rod according to the controller, and drives the medicine leakage plate to open the medicine leakage at a fixed time; the medicine changing component controls the movement of the second electric push rod according to the controller 14 program, and drives the net cage to rise and fall.

[0022] Compared with the prior art, the technical solution of the present invention realizes automatic addition of medicine into the net cage, saves manpower, and has the advantages of accurate dosing time and precise dosing amount, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the anti-crystallization device of blind drainage pipe of tunnel during operation period of the present invention installed in the secondary lining of the tunnel;

[0025] Figure 2 1. It is a schematic diagram of the structure of the filler in the gap between the outer support tube and the inclined hole;

[0026] Figure 3 It is the detailed drawing of the external support tube structure;

[0027] Figure 4 It is the structural details of the inner tube, spraying assembly, control assembly and dressing replacement assembly;

[0028] Figure 5 It is a detailed structural drawing of the spraying assembly;

[0029] Figure 6 It is a detailed structural drawing of the drug control component.

[0030] In the above picture:

[0031] 1 drainage blind pipe; 2 external support pipe; 3 internal pipe;

[0032] 4 spraying components; 401 fixed circular plate; 402 first motor; 403 movable circular plate; 404 stirring shovel;

[0033] 5. Mesh cage;

[0034] 6 drug control component; 601 collecting hopper; 602 drug leakage plate; 603 first electric push rod;

[0035] 7 inner pipe cover; 8 outer cover plate; 9 water-swelling waterproof adhesive; 10 secondary lining; 11 waterproof mortar; 12 first guide groove; 13 first sliding block; 14 controller. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0037] In the following description, specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in a variety of other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] Please refer to Figures 1 to 4 , a device for preventing crystallization of blind drainage pipes in tunnels during operation, the tunnel comprising primary support and secondary lining 10 from outside to inside, the blind drainage pipe 1 being arranged at the junction of the primary support and the secondary lining 10 at the bottom of the tunnel along the length direction of the tunnel, the device for preventing crystallization of blind drainage pipes in tunnels during operation comprising an outer support pipe 2, an inner pipe 3, a medicine spraying component 4 and a medicine changing component;

[0039] The secondary lining 10 is provided with an inclined hole inclined outward and downward, the lower end of the inclined hole is connected to the drainage blind pipe 1, the outer support pipe 2 is arranged in the inclined hole, the inner pipe 3 is arranged in the outer support pipe 2, and the medicine spraying assembly 4 and the medicine changing assembly are arranged in sequence from top to bottom in the inner pipe 3.

[0040] Further, it also includes a controller 14; Figure 4 and Figure 5 The spraying assembly 4 includes a fixed circular plate 401 arranged in the middle position of the inner tube 3, and a fixed plate fan-shaped notch is arranged on the fixed circular plate 401. A first motor 402 is fixedly connected to the inner wall of the inner tube 3 below the fixed circular plate 401, and a movable circular plate 403 is connected to the output shaft of the first motor 402, and a movable plate fan-shaped notch is arranged on the movable circular plate 403. The movable circular plate 403 is arranged closely below the fixed circular plate 401; the first motor 402 is electrically connected to the controller 14.

[0041] In the above embodiment, the inner tube 3 above the fixed circular plate 401 is used as a medicine storage box, and pill-shaped acidic chemicals are placed inside. When the medicine is not sprayed, the fan-shaped gaps on the fixed circular plate 401 and the movable circular plate 403 do not overlap, and the medicine cannot pass through; when the medicine is sprayed, the first motor 402 is started, the movable circular plate 403 rotates, the two fan-shaped gaps overlap, and the medicine can pass through.

[0042] Furthermore, the output shaft of the first motor 402 passes through the center of the fixed circular plate 401 and is connected to a stirring shovel 404 .

[0043] In the above embodiment, the stirring shovel 404 is located outside the fixed circular plate 401 and is connected to the output shaft of the first motor 402. When spraying medicine, the stirring shovel 404 rotates to prevent the medicine from being blocked.

[0044] Furthermore, the dressing changing assembly comprises a cylindrical mesh cage 5, the upper and lower ends of the mesh cage 5 are connected, the mesh cage 5 is connected to the lower end of the inner tube 3, and the lower end of the mesh cage 5 is in contact with the bottom of the drainage blind pipe 1. Medicine is placed in the mesh cage 5 to continuously react chemically with the water in the drainage blind pipe 1 to prevent the generation of solid crystals.

[0045] For further reference, Figure 6 , also includes a medicine control component 6, which is arranged in the inner tube 3 between the medicine spraying component 4 and the medicine changing component; the medicine control component 6 includes a collecting hopper 601, and the collecting hopper 601 is a cylindrical shell with an upper opening, and the bottom of the collecting hopper 601 is hinged with a medicine leakage plate 602 that can be rotated downward to open, and a first electric push rod 603 is arranged on the inner wall of the inner tube 3 below the collecting hopper 601, the shell of the first electric push rod 603 is hinged on the inner wall of the inner tube 3, and the upper end of the piston rod of the first electric push rod 603 is hinged to the lower surface of the medicine leakage plate 602; the first electric push rod 603 is electrically connected to the controller 14.

[0046] In the above embodiment, the controller 14 sets the drug exhaustion time, and controls the first motor 402 to rotate and release the drug into the collecting hopper 601 at a fixed time. The controller 14 also controls the first electric push rod 603 to open the drug leakage plate 602 at a fixed time to release the drug in the collecting hopper 601. In order to improve the intelligence of the device, a weighing sensor is provided on the drug leakage plate 602, and the weighing sensor is electrically connected to the controller 14. The controller 14 can be set with a program, and when the weight of the drug in the collecting hopper 601 reaches a set threshold, the first electric push rod 603 is controlled to act.

[0047] For further reference, Figure 2The gap between the inclined hole near the lower end and the outer support pipe 2 is filled with water-swelling waterproofing glue 9, and the gap between the inclined hole and the outer support pipe 2 in the remaining part is filled with waterproof mortar 11. Since the outer support pipe 2 is a permanent structure and will not move after installation, there is a gap between it and the secondary lining 10. The gap is filled with water-swelling waterproofing glue 9 near the end of the drainage blind pipe 1, and the remaining gaps are filled with waterproof mortar 11.

[0048] Furthermore, the upper end of the inner tube 3 is provided with an inner tube cover 7, and the upper end of the outer support tube 2 is provided with an outer cover plate 8. In the above embodiment, the inner tube cover 7 is provided on the upper end of the inner tube 3 to prevent air from reacting with the medicine and weakening the medicine effect.

[0049] For further reference, Figure 3 and Figure 4 In order to prevent the inner tube 3 from rotating in the outer support tube 2, the inner wall of the outer support tube 2 is provided with an axial first guide groove 12, and the outer wall of the inner tube 3 is provided with a first slider 13 matching the guide groove.

[0050] The inner wall of the inner tube 3 is provided with a second guide groove, the outer wall of the mesh cage 5 is provided with a second slider matching the second guide groove, the inner wall of the inner tube 3 is provided with a second electric push rod, the piston rod of the second electric push rod is connected to the inner wall of the mesh cage 5; the second electric push rod is electrically connected to the controller 14.

[0051] Since it is hoped that sufficient drugs will be effective to prevent crystallization, the interval between spraying should be conservatively designed, that is, the old drugs have not been consumed when new drugs are injected. When no drugs are loaded, the mesh cage 5 is located at the lowest point, in contact with the bottom of the drainage blind pipe 1, and the drugs are constrained in the mesh cage 5 to work. When spraying drugs, the controller 14 controls the second electric push rod to drive the mesh cage 5 to rise, so that the old drugs are washed away by the water flow, to prevent the excessive drugs in the mesh cage 5 from hindering the water flow. After the undissolved drugs are washed away by the water flow, the controller 14 controls the second electric push rod to drive the mesh cage 5 to descend to the bottom, and the new drugs enter the mesh cage 5 and work.

[0052] (II) A method for preventing crystallization of blind drainage pipes in tunnels during operation, comprising the following steps:

[0053] Step 1: Install the outer support pipe in the inclined hole of the secondary lining, fill the gap between the inclined hole near the lower end and the outer support pipe with water-swelling waterproof glue, and fill the gap between the inclined hole and the outer support pipe in the remaining part with waterproof mortar;

[0054] Step 2: Place the inner tube containing the spraying component, the control component and the changing component into the outer support tube;

[0055] Step 3, opening the outer cover plate and the inner tube cover in sequence, and putting the anti-crystallization drug into the inner tube;

[0056] Step 4: The medicine spraying component starts the first motor according to the controller program, drives the movable circular plate to rotate, and releases the medicine to the medicine controlling component. The medicine controlling component controls the movement of the first electric push rod according to the controller program, and drives the medicine leakage plate to open the medicine leakage at a fixed time; the medicine changing component controls the movement of the second electric push rod according to the controller program, and drives the net cage to rise and fall.

[0057] Although the present invention has been described in detail in this specification by means of general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements may be made thereto on the basis of the present invention. Therefore, these modifications or improvements made without departing from the present invention all fall within the scope of protection claimed by the present invention.

Claims

1. A device for preventing crystallization of drainage blind pipes in tunnels during operation, wherein the tunnel comprises primary support and secondary lining (10) from outside to inside, and the drainage blind pipe (1) is arranged at the junction of the primary support and the secondary lining (10) at the bottom of the tunnel along the length direction of the tunnel, characterized in that: It comprises an outer support tube (2), an inner tube (3), a medicine spraying component (4) and a medicine changing component; The secondary lining (10) is provided with an inclined hole inclined outward and downward, the lower end of the inclined hole is connected to the drainage blind pipe (1), the outer support pipe (2) is arranged in the inclined hole, the inner pipe (3) is arranged in the outer support pipe (2), and the medicine spraying assembly (4) and the medicine changing assembly are arranged in sequence from top to bottom in the inner pipe (3); It also includes a controller (14); the spraying assembly (4) includes a fixed circular plate (401) arranged in the middle position of the inner tube (3), the fixed circular plate (401) is provided with a fixed plate fan-shaped notch, a first motor (402) is fixedly connected to the inner wall of the inner tube (3) below the fixed circular plate (401), a movable circular plate (403) is connected to the output shaft of the first motor (402), the movable circular plate (403) is provided with a movable plate fan-shaped notch, and the movable circular plate (403) is arranged closely below the fixed circular plate (401); the first motor (402) is electrically connected to the controller (14); The dressing changing assembly comprises a cylindrical mesh cage (5), the upper and lower ends of the mesh cage (5) are connected, the mesh cage (5) is connected to the lower end of the inner tube (3), and the lower end of the mesh cage (5) is in contact with the bottom of the drainage blind pipe (1); It also includes a drug control component (6), which is arranged in the inner tube (3) between the drug spraying component (4) and the drug changing component; the drug control component (6) includes a collecting hopper (601), which is a cylindrical shell with an upper opening, and the bottom of the collecting hopper (601) is hinged with a drug leakage plate (602) that can be rotated downward to open, and a first electric push rod (603) is arranged on the inner wall of the inner tube (3) below the collecting hopper (601), the shell of the first electric push rod (603) is hinged on the inner wall of the inner tube (3), and the upper end of the piston rod of the first electric push rod (603) is hinged on the lower surface of the drug leakage plate (602); the first electric push rod (603) is electrically connected to the controller (14).

2. The anti-crystallization device for blind drainage pipes in tunnels during operation according to claim 1 is characterized in that: A weighing sensor is provided on the medicine leaking plate (602), and the weighing sensor is electrically connected to the controller (14).

3. The anti-crystallization device for blind drainage pipes in tunnels during operation according to claim 1 is characterized in that: The gap between the inclined hole near the lower end and the outer support tube (2) is filled with water-swellable waterproof glue (9), and the gap between the inclined hole in the remaining part and the outer support tube (2) is filled with waterproof mortar (11); the upper end of the inner tube (3) is provided with an inner tube cover (7), and the upper end of the outer support tube (2) is provided with an outer cover plate (8).

4. The anti-crystallization device for blind drainage pipes in tunnels during operation according to claim 3 is characterized in that: The output shaft of the first motor (402) passes through the center of the fixed circular plate (401) and is connected to a stirring shovel (404).

5. The anti-crystallization device for blind drainage pipes in tunnels during operation according to claim 3 is characterized in that: The inner wall of the outer support tube (2) is provided with an axial first guide groove (12), and the outer wall of the inner tube (3) is provided with a first sliding block (13) matching the first guide groove (12).

6. The anti-crystallization device for blind drainage pipes in tunnels during operation according to claim 5, characterized in that: The inner wall of the inner tube (3) is provided with a second guide groove, the outer wall of the mesh cage (5) is provided with a second sliding block matching the second guide groove, the inner wall of the inner tube (3) is provided with a second electric push rod, the piston rod of the second electric push rod is connected to the inner wall of the mesh cage (5); the second electric push rod is electrically connected to the controller (14).

7. A method for preventing crystallization of blind drainage pipes in tunnels during operation, characterized in that: Based on the anti-crystallization device for blind drainage pipes in tunnels during operation according to claim 6, the anti-crystallization method for blind drainage pipes in tunnels during operation comprises the following steps: Step 1: Install the outer support pipe in the inclined hole of the secondary lining, fill the gap between the inclined hole near the lower end and the outer support pipe with water-swelling waterproof glue, and fill the gap between the inclined hole and the outer support pipe in the remaining part with waterproof mortar; Step 2: Place the inner tube containing the spraying component, the control component and the changing component into the outer support tube; Step 3, opening the outer cover plate and the inner tube cover in sequence, and putting the anti-crystallization drug into the inner tube; Step 4: The medicine spraying component starts the first motor according to the controller program, drives the movable circular plate to rotate, and releases the medicine to the medicine controlling component. The medicine controlling component controls the movement of the first electric push rod according to the controller program, and drives the medicine leakage plate to open the medicine leakage at a fixed time; the medicine changing component controls the movement of the second electric push rod according to the controller program, and drives the net cage to rise and fall.

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