Device for underwater leakage tracing inspection and its usage method

Abstract

The present invention relates to a device for underwater leakage tracing inspection and its using method. The object of the present invention is to provide a device for underwater leakage tracing inspection and its using method which has a simple structure, is easy to detect, and is not restricted by water depth. The technical solution of the present invention is: a device for underwater leakage tracing inspection, characterized in that it has a permeable frame and a membrane bag type tracer container placed inside the permeable frame. A hose is connected to the tracer container and is connected to a nozzle through the hose. A squeezing mechanism is provided corresponding to the tracer container for squeezing the tracer container so that the tracer inside the container is ejected from the nozzle through the hose. The present invention is applicable to the field of underwater tracing inspection.

Description

Technical Field

[0001] The present invention relates to a device for underwater leakage tracing inspection and its usage method, which is applicable to the field of underwater tracing inspection. Background Art

[0002] As China enters the post-hydroelectric era, tens of thousands of existing reservoir dams have fully entered the stage of engineering maintenance and protection, and regular dam leakage inspections are required. At the same time, underwater abnormal area inspections are also needed for river, lake, and embankment banks, especially inspections on whether cracks are leaking water. As a cost-effective and intuitive underwater inkjet tracing inspection method, it has always been used as the most conventional method.

[0003] In the leakage inspection of relatively shallow waters, generally, a diver holds a bottle filled with a tracing medium (usually ink), and by squeezing the bottle body, forces the tracer to spray out of the nozzle of the bottle mouth, and checks along the suspected leakage point with the tracer, and observes the flow state of the dyed water body to judge whether there is a leakage channel nearby.

[0004] When the water depth exceeds 50 meters, generally only ROV can be used for carrying. The ROV needs to be controlled by a dedicated control unit. Usually, a rigid sleeve container structure (similar to a syringe) is adopted, and a motor drives a screw to squeeze the tracer and push it from one end to the other end; or an underwater robotic arm is used to squeeze a flexible container to generate a pressure difference to squeeze out the tracer to check the leakage channel.

[0005] The main disadvantages of using manual diving for tracing inspection are relatively high comprehensive cost. Exploring and advancing in unfamiliar waters itself is also full of risks. When the area is large, due to the limited physical strength of divers, the efficiency is low. Using an underwater ROV robot equipped with a spraying device is a better solution, but too precise control and high requirements for operators do not reflect the superiority of traditional tracing inspection. It has high requirements for the motor bearing seal, and special designs are required for the pressure resistance value of the device container, the change of buoyancy during spraying, and the reloading of the tracer to ensure reliability. Summary of the Invention

[0006] The technical problem to be solved by the present invention is: aiming at the above problems, to provide a device for underwater leakage tracing inspection and its usage method with simple structure, convenient detection, and not limited by water depth.

[0007] The technical solution adopted by the present invention is: a device for underwater leakage tracing inspection, characterized in that: it has a permeable frame and a membrane bag type tracer container placed inside the permeable frame. A hose is connected to the tracer container and is connected to a nozzle through the hose. A squeezing mechanism is provided corresponding to the tracer container for squeezing the tracer container so that the tracer inside the container is sprayed out of the nozzle through the hose.

[0008] One end of the nozzle communicates with the hose, and the other end is closed. Side openings are formed on the side wall of the nozzle.

[0009] An elastic spacer sleeve covering the side openings is sleeved on the nozzle, and the part of the elastic spacer sleeve close to the hose is tied and fixed to the nozzle.

[0010] The outer diameter of the nozzle gradually decreases from the end close to the hose to the other end.

[0011] The squeezing mechanism has a rack wound and tied on the tracer container. A one-way control head is arranged on the rack. The rack and the one-way control head cooperate to tighten the rack wound and tied on the tracer container to realize the squeezing of the tracer container.

[0012] One end of the rack is fixed on the permeable frame, and the other end passes through the two one-way control heads. A reciprocating mechanism capable of repeatedly changing the distance between the two one-way control heads is arranged between the two one-way control heads.

[0013] The reciprocating mechanism has a scissor fork structure, and the two action ends of the scissor fork structure are respectively connected to the two one-way control heads.

[0014] The rack extends to the rack recovery box after passing through the two one-way control heads.

[0015] A using method of the device for underwater leakage tracing inspection, which is characterized in that:

[0016] After exhausting the air in the tracer container, pour the tracer into the container through the hose, install the nozzle well, sleeved the elastic spacer sleeve on the side opening of the nozzle, and tie it firmly.

[0017] Place the tracer container on the permeable frame and install the squeezing mechanism.

[0018] Squeeze the tracer container through the squeezing mechanism so that the tracer in the container sprays out from the nozzle after passing through the hose.

[0019] The beneficial effects of the present invention are as follows: The present invention adopts a membrane bag type tracer container. Since its structure has no cavity and the extrusion depends on a single-axis reciprocating motion, it can be fully integrated with the water pressure, so it is not affected by the water depth and always maintains the convenience of operation. As long as the carrier can reach the position, the device can be used, so it is not limited by the water depth.

[0020] In the present invention, the nozzle and the elastic spacer sleeve cooperate to keep it airtight before spraying, so that the water body remains clear and does not affect the line of sight. Once sprayed, the dyed water body forms a dyed cloud shape with a clear boundary, which is conducive to observation. In the traditional method, the nozzle is often open, and there is a situation where the tracer is continuously diluted and flows out of the nozzle during the process, affecting the starting spraying concentration and resulting in blurred observation of the water body. Therefore, maintaining the spraying concentration can improve the observation effect.

[0021] The present invention uses a one-way rack belt for extrusion and drumming, which can achieve gradual and small-scale contraction. Hundreds of teeth can achieve hundreds of ejection actions, and stretching one tooth or multiple teeth at a time results in obvious differences, so the control is sensitive.

[0022] The entire device of the present invention can be assembled only by relying on a few plastic parts and some rubber parts, and the materials are widely sourced with low application costs.

[0023] The present invention has simple requirements for the power structure. Only reciprocating motion is required to achieve extrusion, and the technical requirements for remote control equipment are low, but the achieved result accuracy is high. Brief Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of an embodiment.

[0025] Figure 2 It is a schematic diagram of a nozzle with an elastic spacer sleeve in the embodiment.

[0026] Figure 3 It is a schematic diagram of the nozzle in the embodiment.

[0027] Figure 4 It is a schematic structural diagram of the one-way rack belt in the embodiment.

[0028] In the figure: 1. tracer container; 2. hose; 3. nozzle; 3-1-1. side opening; 3-2. elastic spacer sleeve; 3-2-1. binding rope; 4. permeable frame; 5-1. one-way control head; 5-2. rack; 6. rack recycling box; 7. scissors fork structure. Detailed Description of the Embodiment

[0029] This embodiment is a device for underwater leakage tracer inspection, which has a permeable frame similar to fish ribs and a membrane bag-type tracer container placed inside the permeable frame. The tracer container is connected with a hose and connected to the nozzle through the hose.

[0030] In this example, one end of the nozzle is connected to the hose and the other end is closed. The outer diameter of the nozzle gradually decreases from the end close to the hose to the closed end. A flat and long side opening is provided on the side wall of the nozzle; an elastic spacer sleeve covering the side opening is sleeved on the nozzle. The elastic spacer sleeve is made of elastic film, and the end of the elastic spacer sleeve close to the hose is fixed to the nozzle by a binding rope.

[0031] In this embodiment, an extrusion mechanism is provided on the permeable frame for extruding the tracer container so that the tracer in the container is ejected from the nozzle through a hose. The extrusion mechanism adopts a double one-way control head rack belt, which has a rack and two one-way control heads sleeved on the rack. In this example, the rack is wound and tied around the tracer container, which can be one circle or multiple circles; one end of the rack is fixed on the permeable frame, and the other end passes through the two one-way control heads in sequence and then extends to the rack recovery box, and the rack recovery box is fixed on the permeable frame. Both one-way control heads can only move in one direction from the end of the rack recovery box of the rack to the other end. A reciprocating mechanism is connected to the two one-way control heads and can repeatedly change the distance between the two one-way control heads.

[0032] In this example, the reciprocating mechanism has a scissor structure, which is an X-shaped structure formed by the operating rod I and the operating rod II being rotatably connected by a rotating shaft. One end of the operating rod I is connected to one one-way control head on the rack, and the other end of the operating rod I is the operating end I; one end of the operating rod II is connected to the other one-way control head on the rack, and the other end of the operating rod II is the operating end II. By operating the operating ends I and II, the distance between the two one-way control heads is repeatedly changed. When the one-way control head receives a force that increases the distance between the two one-way control heads, the one-way control head close to the tracer container moves along the rack towards the end of the rack away from the rack recovery box, and the other one-way control head remains stationary; when the one-way control head receives a force that reduces the distance between the two one-way control heads, the one-way control head close to the tracer container remains stationary, and the other one-way control head moves along the rack towards the end of the rack away from the rack recovery box.

[0033] In this embodiment, the rack recovery box has a pulling force on the rack for pulling the rack, which can ensure that the pulled-out rack can be curled and recovered into the rack recovery box, and the magnitude of this pulling force can make one one-way control head move relative to the rack, but cannot make the two one-way control heads move relative to the rack at the same time. In this embodiment, when the distance between the two one-way control heads is reduced, it may cause the rack between the two one-way control heads to bend. At this time, under the action of the pulling force of the rack recovery box, the one-way control head close to the rack recovery box will move forward relative to the rack until the rack between the two one-way control heads becomes straight.

[0034] In this embodiment, every time the rack is stretched by one tooth position by another one-way control head, the tracer container is slightly compressed once. As long as the two control heads alternate to form a scissor-like movement, a controllable and multiple spraying can be formed. The movement amplitude of the scissor determines the amount of tracer sprayed. Therefore, the control structure power is relatively simple, and the pulled-out rack finally curls naturally in the rack collection box.

[0035] The usage method of this embodiment is as follows:

[0036] Install a permeable frame at a suitable position on the ROV. After exhausting the air in the tracer container as much as possible, pour the tracer into the container through a hose, install the nozzle, put the elastic spacer sleeve on the side opening of the nozzle, and tie it firmly. Place the tracer container on the support frame and wind and tie it with a one-way rack belt, which can be one circle or multiple circles. Place the nozzle in a conspicuous position in front of the ROV camera. Pull the reciprocating mechanism through the controllable components of the ROV (such as the displacement generated by adjusting the camera angle), so that the two one-way rack belts at the end of the scissor fork structure form a one-way movement, that is, the spraying action is realized. The pulling amplitude each time determines the spraying quantity.

Claims

1. An apparatus for underwater leakage tracing inspection, characterized in that: It has a permeable frame (4) and a membrane bag type tracer container (1) placed inside the permeable frame (4). A hose (2) is connected to the tracer container (1) and is connected to a nozzle (3) through the hose (2). A squeezing mechanism is provided corresponding to the tracer container (1) for squeezing the tracer container (1) so that the tracer inside the container is ejected from the nozzle (3) through the hose (2). The squeezing mechanism has a rack (5-2) wound and tied around the tracer container (1). A one-way control head (5-1) is arranged on the rack (5-2). The rack (5-2) and the one-way control head (5-1) cooperate to tighten the rack wound and tied around the tracer container to achieve squeezing of the tracer container. One end of the rack (5-2) is fixed to the permeable frame (4), and the other end passes through the two one-way control heads (5-1). A reciprocating mechanism capable of repeatedly changing the distance between the two one-way control heads is arranged between the two one-way control heads (5-1). The reciprocating mechanism has a scissor fork structure (7), and the two action ends of the scissor fork structure are respectively connected to the two one-way control heads (5-1).

2. The apparatus for underwater leakage tracing inspection according to claim 1, characterized in that: One end of the nozzle (3) is communicated with the hose (2), and the other end is closed. A side opening (3-1-1) is opened on the side wall of the nozzle. An elastic spacer sleeve (3-2) covering the side opening (3-1-1) is sleeved on the nozzle (3), and the elastic spacer sleeve is tied and fixed to the nozzle (3) near the hose (2).

3. The apparatus for underwater leakage tracing inspection according to claim 2, characterized in that: The outer diameter of the nozzle (3) gradually decreases from the end near the hose (2) to the other end.

4. The apparatus for underwater leakage tracing inspection according to claim 1, characterized in that: The rack (5-2) extends to a rack recovery box (6) after passing through the two one-way control heads (5-1).

5. A method for using the apparatus for underwater leakage tracing inspection according to any one of claims 1 to 4, characterized in that: After exhausting the air in the tracer container, pour the tracer into the container through the hose, install the nozzle well, put the elastic spacer sleeve on the side opening of the nozzle, and tie it firmly. Place the tracer container on the permeable frame and install the squeezing mechanism. Squeeze the tracer container through the squeezing mechanism so that the tracer in the container is ejected from the nozzle after passing through the hose.

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