Intake assembly of combustible gas inspection robot and inspection robot

Abstract

The utility model relates to gas detection technical field, and disclose a kind of combustible gas inspection robot's air intake component and inspection robot, the air intake component includes pipe body, venturi mechanism and heat dissipation mechanism;One end of pipe body is connected in the gas sensor detection chamber of inspection robot, other end is communicated with air inlet, air inlet is set on the shell of inspection robot, and communicated with external environment, venturi mechanism is spaced apart in pipe body along the axial direction, the heat dissipation mechanism is set in the pipe body one side of adjacent venturi mechanism interval, for making pipe wall form temperature difference in circumference direction;The application can realize the gas near the whole pipeline wall surface to obtain sustained active update, avoid the occurrence of false alarm of inspection robot in clean environment due to gas near wall surface long time stagnation.

Description

Technical Field

[0001] This utility model relates to the field of gas detection technology, specifically to the air intake component and inspection robot of a combustible gas inspection robot. Background Technology

[0002] The air intake component and inspection robot of the combustible gas inspection robot are a type of drone used to detect the composition and content of gases. In industrial sites such as petrochemical, natural gas transmission, and underground integrated pipe corridors, inspection robots equipped with combustible gas sensors are often used to inspect for potential hazards such as pipeline leaks and equipment sealing failures. These robots draw in outside air through an air inlet on their shell that is connected to the external environment via an air pump during flight, and then transport it through pipelines to the sensor detection chamber, where the sensor detects the concentration of combustible gas in the air.

[0003] In existing technology, the air intake assembly is a gas delivery pipe connecting the air inlet and the sensor. It is usually made of a straight pipe with a circular cross-section of equal diameter. When the gas flows in the pipe, the layer of gas close to the pipe wall forms a slow zone due to fluid viscosity and pipe wall friction. At the same time, the gas in the pipe is subjected to parallel forces and does not have lateral disturbance, which causes the gas near the wall to stagnate. The slow release of this stagnant gas can cause the inspection robot to still show a high concentration of combustible gas in a clean environment, resulting in false alarms. Utility Model Content

[0004] The purpose of this application is to solve the problem that gas retention in existing air intake components causes false alarms by inspection robots in clean environments.

[0005] The air intake assembly of the combustible gas inspection robot includes a pipe. One end of the pipe is connected to the gas sensor detection chamber of the inspection robot, and the other end is connected to the air inlet. The air inlet is located on the shell of the inspection robot and is connected to the external environment. Gas is drawn in from the air inlet by an air pump connected after the gas sensor detection chamber. The drawn-in gas passes through a Venturi mechanism. Multiple Venturi mechanisms are spaced apart axially within the pipe. The Venturi mechanism is configured to have an inner cavity that first contracts and then expands along the airflow direction. This causes the channel to narrow when the gas flows through the contraction section, and the gas velocity increases at this point, preventing the gas from lingering. When the gas enters the expansion section, the channel suddenly widens. The high-speed airflow cannot turn due to inertia and cannot follow the direction of the wall expansion. A local low-pressure zone is formed near the wall at the beginning of the expansion section. The downstream high-pressure gas flows towards this low-pressure zone. Backflow from the venturi area collides with the forward-moving mainstream, generating vortices near the wall. These vortices continuously rotate, drawing in and carrying away the original gas near the wall while simultaneously bringing fresh gas from the center of the pipe to the vicinity of the wall, thus preventing gas stagnation. To prevent the acceleration of the contraction section of the next Venturi mechanism from interfering with the vortex disturbances formed by the previous Venturi mechanism, a gap is set between adjacent Venturi mechanisms, and a heat dissipation mechanism is installed on one side of the pipe body within this gap. While dissipating heat from the pipe body, a temperature difference is created between the pipe wall on the side with the heat dissipation mechanism and the pipe wall on the side without the heat dissipation mechanism. This temperature difference drives the gas inside the pipe to flow laterally, preventing the gas, which has slowed down after passing through the expanded inner cavity, from stagnating in this gap. This greatly reduces gas stagnation in the pipe body and prevents false alarms from the inspection robot caused by the slow release of gas trapped in the pipe body in the clean environment.

[0006] This application also discloses an inspection robot, including an air intake assembly for the combustible gas inspection robot.

[0007] This invention, through the arrangement of a Venturi mechanism and a heat dissipation mechanism, allows gas to flow through the Venturi mechanism. The contraction section accelerates the gas, while the expansion section generates vortices near the wall, actively renewing the gas near the wall. The heat dissipation mechanism on one side creates a temperature difference around the pipe wall, pushing gas molecules away from the wall through thermal diffusion. This achieves continuous active renewal of the gas near the wall of the entire pipe, avoiding false alarms from inspection robots in clean environments caused by prolonged gas stagnation near the wall. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the overall appearance of the tube body of this utility model; Figure 2 This is a cross-sectional structural diagram of the tube body of this utility model; Figure 3 This is a schematic diagram of the Venturi mechanism of this utility model.

[0009] In the picture: 100. Pipe body; 200. Venturi mechanism; 210. First pipe section; 220. Second pipe section; 230. Third pipe section; 240. First cavity; 250. Through hole; 300. Heat dissipation mechanism. Detailed Implementation

[0010] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0011] Example 1

[0012] In order to solve the problems of the prior art as pointed out in the background, referring to Figures 1-3 This utility model application discloses an air intake component and an inspection robot for combustible gas inspection, including: The tube body 100 has one end connected to the gas sensor detection chamber of the inspection robot and the other end connected to the air inlet, which is located on the shell of the inspection robot and connected to the external environment. A venturi mechanism 200, a plurality of said venturi mechanisms 200 are arranged axially spaced within the tube body 100, said venturi mechanism 200 being configured to have an inner cavity that first contracts and then expands along the airflow direction, so that when the detection gas passes through, it first accelerates and then generates a vortex at the expanded inner cavity; A heat dissipation mechanism 300 is disposed on one side of the tube body 100, which is adjacent to the Venturi mechanism 200, and is used to create a temperature difference in the circumferential direction of the tube wall.

[0013] Because of the above-mentioned features, the gas of this invention enters the pipe body 100 through the air inlet on the shell of the inspection robot, first passes through the upstream pipe section, and then enters the first Venturi mechanism 200. The gas is accelerated in the contraction section, so that the gas does not have time to stay. At the same time, after entering the expansion section, it cannot immediately stick to the wall due to inertia, and a local low-pressure area is formed near the wall. The downstream gas flows back into the low-pressure area and collides with the mainstream to generate a vortex. The vortex rotates closely against the wall, entraining the original gas near the wall into the mainstream and carrying it away. At the same time, fresh gas from the center of the pipe is replenished to the vicinity of the wall, thereby preventing the gas from stagnating in the expansion section. After leaving the Venturi mechanism 200, the gas enters the interval pipe section. A heat dissipation mechanism 300 is provided on one side of the outer wall of the interval pipe section, so that a temperature difference is formed on both sides of the pipe wall, pushing the gas molecules near the wall away from the wall and preventing them from stagnating at the interval. The above process is repeated along the axial direction of the pipe body 100, so that the gas near the wall of the entire pipe is continuously renewed, preventing false alarms from the inspection robot in a clean environment due to the stagnation of gas on the pipe body 100.

[0014] The following describes in detail the specific implementation methods for achieving the above-mentioned technical features and the effects that can be further produced.

[0015] Reference Figure 3 In one specific implementation, the Venturi mechanism 200 includes a first pipe section 210, a second pipe section 220 and a third pipe section 230 connected sequentially along the airflow direction. The ends of the first pipe section 210 and the third pipe section 230 that are far apart from each other are connected to the inner wall of the pipe body 100. The flow cross-sectional area of ​​the first pipe section 210 and the third pipe section 230 is larger than the flow cross-sectional area of ​​the second pipe section 220.

[0016] Specifically, the first pipe section 210 is funnel-shaped, and its flow cross-sectional area gradually decreases until it is equal to that of the second pipe section 220. This allows the gas to flow into the first pipe section 210 through the pipe body 100 and then accelerate through the second pipe section 220. The third pipe section 230 has a flow cross-sectional area that gradually increases until it is equal to that of the pipe body 100. As the cross-sectional area of ​​the pipe cavity gradually expands, the high-speed airflow tends to maintain its original straight-line forward movement under the action of inertia and cannot immediately adhere to the gradually expanding pipe wall. This creates a local low-pressure zone near the wall at the beginning of the third pipe section 230. This low-pressure zone causes the downstream high-pressure gas to backflow towards the wall, forming a vortex near the wall. This vortex continuously picks up the gas near the wall and mixes it into the mainstream, which carries it forward. This continuously renews the gas near the wall and reduces the residence time of gas molecules near the pipe wall.

[0017] To ensure a more stable airflow into the gas sensor detection chamber, which is beneficial for the detection process, refer to... Figures 2-3In this embodiment, a first cavity 240 is formed between the inner wall of the tube body 100 and the Venturi mechanism 200. A through hole 250 is provided on the second tube segment 220, and the first cavity 240 is connected to the Venturi mechanism 200 through the through hole 250.

[0018] Specifically, when the gas pressure inside the tube 100 suddenly increases, the gas pressure entering the second tube section 220 will be greater than the gas pressure in the first cavity 240. This causes the excess gas to be forced into the first cavity 240 through the through hole 250. When the gas pressure suddenly decreases, the excess gas falls back from the first cavity 240 into the second tube section 220 through the through hole 250, thus playing a buffering role and making the airflow reaching the gas sensor detection chamber more stable.

[0019] To prevent stagnation caused by slow gas flow at intervals of 100 mm in the tube, refer to... Figure 1 , Figure 3 In this embodiment, the heat dissipation mechanism 300 is composed of multiple heat dissipation fins, and the inner cavity cross-section of the tube body 100 is elliptical.

[0020] Specifically, multiple heat dissipation fins are arranged on one side of the outer wall of the tube, increasing the contact area between that side of the tube wall and the surrounding air. This allows the tube 100 to dissipate heat while creating a temperature difference with the other side of the tube 100. This temperature difference drives the gas molecules inside the tube to be continuously pushed away from the wall surface to prevent them from stagnating due to the thermal diffusion effect. Furthermore, the tube walls on both sides of the short axis of the elliptical tube 100 are close together, resulting in a high migration rate of the thermal diffusion effect and making the effect of pushing the gas away from the wall surface more obvious.

[0021] To improve the sealing performance of pipe body 100, refer to Figures 1-3 In this embodiment, the Venturi mechanism 200, heat dissipation fins, and tube body 100 are integrally formed.

[0022] This embodiment also discloses an inspection robot, including an air intake component for a combustible gas inspection robot, wherein the air intake component is connected to the inspection robot in an existing manner.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An intake assembly for a combustible gas inspection robot, the intake assembly comprising: include: The tube (100) has one end connected to the gas sensor detection chamber of the inspection robot and the other end connected to the air inlet, which is located on the shell of the inspection robot and connected to the external environment. Venturi mechanism (200), a plurality of Venturi mechanisms (200) are axially spaced within the tube body (100), the Venturi mechanism (200) is configured to have an inner cavity that first contracts and then expands along the airflow direction, so that the detection gas is accelerated first and then generates a vortex at the expanded inner cavity when it passes through; A heat dissipation mechanism (300) is provided on one side of the tube body (100) spaced apart from the adjacent Venturi mechanism (200) to create a temperature difference in the circumferential direction of the tube wall.

2. The combustible gas inspection robot according to claim 1, wherein: The Venturi mechanism (200) includes a first pipe section (210), a second pipe section (220) and a third pipe section (230) connected sequentially along the airflow direction. The ends of the first pipe section (210) and the third pipe section (230) that are far apart from each other are connected to the inner wall of the pipe body (100). The flow cross-sectional area of ​​the first pipe section (210) and the third pipe section (230) is larger than the flow cross-sectional area of ​​the second pipe section (220).

3. The combustible gas patrol robot's intake assembly of claim 2, wherein: The inner wall of the tube (100) and the Venturi mechanism (200) restrict the formation of a first cavity (240), and a through hole (250) is provided on the second tube section (220). The first cavity (240) is connected to the Venturi mechanism (200) through the through hole (250).

4. The combustible gas patrol robot of claim 3, wherein: The heat dissipation mechanism (300) consists of multiple heat dissipation fins.

5. The combustible gas patrol robot's intake assembly of claim 4, wherein: The inner cross-section of the tube (100) is elliptical.

6. The combustible gas patrol robot's intake assembly of claim 5, wherein: The Venturi mechanism (200), heat dissipation fins and tube body (100) are integrally formed.

7. A patrol robot characterized by comprising: The air intake assembly of the combustible gas inspection robot as described in any one of claims 1 to 6.

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