CN117928839A - Hydrogen leakage detection device based on thermal imaging - Google Patents

Abstract

The invention discloses a hydrogen leakage detection device based on thermal imaging, which belongs to the technical field of hydrogen leakage detection and comprises: an air inlet cylinder assembly; the detection cylinder assembly is detachably connected with the air inlet cylinder assembly, and the detection cylinder assembly is communicated with the inner cavity of the air inlet cylinder assembly; the sealing assembly is respectively and movably connected with the air inlet cylinder assembly and the detection cylinder assembly; the installation mechanism is connected with the detection cylinder assembly, the hydrogen leakage detection device based on thermal imaging is used for conveying ambient air to the inner cavity of the detection cylinder assembly through the air inlet cylinder assembly, hydrogen in air reacts with tungsten trioxide to generate heat, the thermal imager is used for detecting heat change, the temperature is higher, the content of the hydrogen in the ambient air can be rapidly detected, and therefore whether the phenomenon of hydrogen leakage exists or not is known, and the working safety is effectively guaranteed.

Description

A hydrogen leak detection device based on thermal imaging

Technical Field

The invention relates to the technical field of hydrogen leakage detection, and in particular to a hydrogen leakage detection device based on thermal imaging.

Background technique

A vacuum furnace is a furnace that uses a vacuum system (composed of carefully assembled components such as a vacuum pump, a vacuum measuring device, and a vacuum valve) to discharge some of the materials in the furnace cavity, making the pressure in the furnace cavity less than a standard atmospheric pressure. The space in the furnace cavity is thus in a vacuum state. Adding an appropriate amount of hydrogen to the vacuum furnace can adjust the atmosphere in the furnace and can be used to reduce oxides and chlorides. In addition, hydrogen can also be used as a fuel for smelting metals to provide heat.

The existing vacuum furnace is mainly sealed by sealing parts. However, since the vacuum furnace is in a high temperature state, long-term high temperature can easily cause the sealing parts to age, thereby causing leakage. The existing vacuum furnace does not have a method for timely hydrogen leakage detection, and manual real-time detection and maintenance of the vacuum furnace are required, which not only causes labor waste but also poses safety hazards. Therefore, how to detect hydrogen leakage in real time to ensure work safety is an urgent problem to be solved by technicians in this technical field.

Summary of the invention

The purpose of the present invention is to provide a hydrogen leakage detection device based on thermal imaging to solve the problem that the existing vacuum furnace mentioned in the above background technology has no method for timely hydrogen leakage detection, and manual real-time detection and maintenance of the vacuum furnace are required, which causes labor waste and also poses a safety hazard.

To achieve the above object, the present invention provides the following technical solution: a hydrogen leakage detection device based on thermal imaging, comprising:

Intake cylinder assembly;

A detection cylinder assembly, wherein the detection cylinder assembly is detachably connected to the air inlet cylinder assembly, and the inner cavities of the detection cylinder assembly and the air inlet cylinder assembly are interlinked;

A sealing assembly, wherein the sealing assembly is movably connected to the air inlet cylinder assembly and the detection cylinder assembly respectively;

A mounting mechanism, the mounting mechanism is connected to the detection cylinder assembly, and the mounting mechanism is connected to the electric hoist;

A detection system is arranged on the circumferential outer side wall of the detection cylinder assembly.

Preferably, the air intake assembly comprises:

Intake cylinder;

a first connecting ring, the first connecting ring being arranged at an end of the air intake cylinder;

An air inlet, the air inlet being arranged on the circumferential outer side wall of the air inlet cylinder;

A partition, the partition is arranged in the inner cavity of the air inlet cylinder, and the partition is arranged at the lower end of the air inlet;

An ultrasonic sensor is arranged on the circumferential outer side wall of the air intake cylinder.

Preferably, the detection cylinder assembly comprises:

A detection cylinder, which is arranged at the end of the first connecting ring, the detection cylinder is connected with the inner cavity of the air inlet cylinder through the first connecting ring, and a tungsten trioxide coating is arranged on the circumferential side wall of the inner cavity of the detection cylinder;

An observation tube assembly, wherein the observation tube assembly is arranged in the inner cavity of the detection tube;

An exhaust duct is arranged at the end of the detection cylinder, and the exhaust duct is connected with the inner cavity of the detection cylinder.

Preferably, the observation tube assembly comprises:

An observation tube, which is coaxially arranged in the inner cavity of the detection tube, and is respectively connected with the detection tube and the inner cavity of the exhaust pipe, and a thermal imager and a camera are arranged on the side wall of the observation tube;

An outer sealing ring, which is arranged on the outer side wall of the observation tube and in the inner cavity of the detection tube;

The second connecting ring is arranged on the inner cavity side wall of the observation tube, the inner side wall of the second connecting ring is provided with an inner sealing ring, and the inner sealing ring penetrates the observation tube and is arranged in the inner cavity of the detection tube.

Preferably, the sealing assembly comprises:

A connecting rod, which is arranged in the inner cavity of the air intake cylinder and movably connected to the partition, and is a hollow tube;

A limit plate, the limit plate is arranged at the end of the connecting rod, the limit plate is arranged in the inner cavity of the air intake cylinder and arranged at the lower end of the partition, a spring is arranged on the side wall of the limit plate, and the spring is arranged at the lower end of the partition;

A piston, the piston is arranged at the end of the connecting rod, the piston is arranged in the inner cavity of the air intake cylinder and arranged at the upper end of the partition, an oblique groove is opened at the end of the piston, and the piston is connected with the inner cavity of the connecting rod;

A connecting rod is arranged in the inner cavity of the piston and passes through the top of the piston to be inserted into the inner cavity of the detection cylinder. A sealing plate is arranged at the end of the connecting rod, and the sealing plate is movably connected to the inner sealing ring.

Preferably, the mounting mechanism comprises:

A mounting frame, the mounting frame is arranged on the outside of the detection cylinder;

A mounting plate, the mounting plate is arranged on the side wall of the mounting frame and connected to the detection cylinder, and a pull ring is arranged on the side wall of the mounting plate;

A guide frame, the guide frame is arranged on the inner side of the mounting frame, the inner side of the guide frame is provided with a guide wheel, and the guide wheel penetrates the side wall of the guide frame and is arranged on the inner side of the mounting frame;

A telescopic mechanism is arranged on the side wall of the mounting frame, and a telescopic end of the telescopic mechanism is connected to the guide frame.

Preferably, the detection system comprises:

A concentration detection system, used to detect the hydrogen concentration;

Positioning system for locating hydrogen leaks.

Preferably, the concentration detection system comprises:

The data preset module is used to execute and store the preset data parameters, including the hydrogen content data at the standard ambient temperature. , environmental volume data/> , color change area/> And the distance data from the ultrasonic wave to the center point/> ;

A processing module, the processing module includes a calculation module, a comparison module and a control module, and is used to perform data calculation and comparison and output control commands based on the calculation and comparison results;

The alarm module includes a wireless module and an audible and visual alarm, and is used to perform long-distance alarms and short-distance audible and visual alarms.

Preferably, the operation steps of the concentration detection system are as follows:

S1: Obtain the standard hydrogen content in one cubic meter of environment through the calculation module ,/> ;

S2: Ambient air enters the detection tube through the air inlet tube and reacts with the tungsten trioxide in the detection tube to generate heat. The temperature data is measured by a thermal imager. , will/> The hydrogen content in one cubic meter is obtained by calculating the hydrogen content in the current environment. ,/> ;

S3: and/> The input is sent to the comparison module for comparison, and the control module outputs different control instructions based on the comparison results.

Preferably, the positioning system includes a display screen for displaying the location of the leakage point;

The operation steps of the positioning system are as follows:

A1: Collect the distance data from the ultrasonic sensor to the center point through the ultrasonic sensor And will/> Input into the data preset module;

A2: Collect the distance data from the ultrasonic sensor to the leak point through the ultrasonic sensor , calculate the closest distance to the ultrasonic sensor through the calculation module/> , will/> The data are transmitted to the display screen, and the location of the leakage point is displayed on the display screen.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The ambient air is transported to the inner cavity of the detection tube assembly through the air intake tube assembly. The hydrogen in the air reacts with tungsten trioxide to generate heat. The heat change is detected by the thermal imager. The higher the temperature, the higher the hydrogen content. The hydrogen content in the ambient air can be detected quickly to know whether there is a hydrogen leak, which effectively ensures work safety.

(2) The equipment can be quickly hoisted through the installation mechanism, which is convenient for maintenance;

(3) The concentration detection system can detect the hydrogen content in the air, and quickly process the alarm through the control module and alarm module, effectively ensuring the safety of the working environment;

(4) The content of tungsten trioxide is detected through a camera and image processing software to ensure the accuracy of hydrogen content detection;

(5) The leak point can be detected by ultrasonic sensor, which can quickly locate the leak point and ensure maintenance efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram of the structure of the present invention;

FIG2 is a schematic structural diagram of an air intake assembly according to the present invention;

FIG3 is a schematic diagram of the structure of the detection tube assembly of the present invention;

FIG4 is a schematic diagram of the structure of the observation tube assembly of the present invention;

FIG5 is a schematic diagram of the sealing assembly structure of the present invention;

FIG6 is a schematic diagram of the structure of the installation mechanism of the present invention;

FIG. 7 is a schematic diagram of leak point positioning according to the present invention.

In the figure: 100 air intake cylinder assembly, 110 air intake cylinder, 120 first connecting ring, 130 air inlet, 140 partition, 150 ultrasonic sensor, 200 detection cylinder assembly, 210 detection cylinder, 220 observation cylinder assembly, 220a observation cylinder, 220b outer sealing ring, 220c second connecting ring, 220c-1 inner sealing ring, 230 exhaust pipe, 300 sealing assembly, 310 connecting rod, 320 limit plate, 320a spring, 330 piston, 330a inclined groove, 340 connecting rod, 340a sealing plate, 400 mounting mechanism, 410 mounting frame, 420 mounting plate, 420a pull ring, 430 guide frame, 430a guide wheel, 440 telescopic mechanism.

Detailed ways

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

The present invention provides a hydrogen leakage detection device based on thermal imaging. The ambient air is transported to the inner cavity of the detection cylinder assembly through the air intake cylinder assembly. The hydrogen in the air reacts with tungsten trioxide to generate heat. The heat change is detected by a thermal imager. The higher the temperature, the higher the hydrogen content. The hydrogen content in the ambient air can be detected quickly, so as to know whether there is a hydrogen leakage phenomenon, which effectively ensures work safety. Please refer to FIG1, which includes: an air intake cylinder assembly 100, a detection cylinder assembly 200, a sealing assembly 300 and a mounting mechanism 400;

Example 1

Please refer to FIG. 1 . The detection cylinder assembly 200 is detachably mounted on the top of the air inlet cylinder assembly 100. The detection cylinder assembly 200 is connected to the inner cavity of the air inlet cylinder assembly 100. The sealing assembly 300 is movably mounted in the inner cavity of the air inlet cylinder assembly 100. The passage between the detection cylinder assembly 200 and the air inlet cylinder assembly 100 is opened and closed by the sealing assembly 300. The air in the external environment enters the inner cavity of the air inlet cylinder assembly 100. The sealing assembly 300 opens the passage between the detection cylinder assembly 200 and the air inlet cylinder assembly 100. When the inner cavity of the detection cylinder assembly 200 enters air at an atmospheric pressure, the sealing assembly 300 disconnects the detection cylinder assembly 200. The passage between the component 200 and the air inlet cylinder component 100, the oxygen in the air reacts with the tungsten trioxide coating in the inner cavity of the detection cylinder component 200 to generate heat, the reaction formula is 2H2+O2+2WO3→2H2O+4W, heat is generated during the reaction, the more hydrogen content, the higher the heat generated, the temperature is detected by the thermal imager installed in the detection cylinder component 200, the hydrogen content in the air is known by the detected temperature, hydrogen leakage will increase the hydrogen content in the air, which will also cause the temperature to be higher when reacting with tungsten trioxide, which can effectively monitor hydrogen leakage and ensure work safety;

The mounting mechanism 400 is detachably mounted on the outer circumferential wall of the detection cylinder assembly 200 . The mounting mechanism 400 is connected to an electric hoist. The device is suspended above a workshop by using the electric hoist and the mounting mechanism 400 in cooperation, so as to facilitate the collection of hydrogen.

Example 2

Please refer to Figures 1-5. The air inlet cylinder 110 is a hollow cylindrical cylinder. The number of air inlet cylinders 110 is 4-8 and is distributed at the corners of the inner cavity of the workshop. As shown in Figure 7, the vacuum furnace is placed in the middle of the workshop, and the air inlet cylinders 110 are distributed around the vacuum furnace.

The first connecting ring 120 is a conical connecting ring, and the first connecting ring 120 is integrally formed on the top of the air intake cylinder 110;

The air inlet 130 is welded on the circumferential outer wall of the air inlet cylinder 110 , and the air inlet 130 is connected with the inner cavity of the air inlet cylinder 110 , and the external air enters the inner cavity of the air inlet cylinder 110 through the air inlet 130 ;

The partition 140 is coaxially welded to the circumferential side wall of the inner cavity of the air intake cylinder 110. The partition 140 and the air intake cylinder 110 are sealed, and the inner cavity of the air intake cylinder 110 is divided into two spaces by the partition 140.

The ultrasonic sensor 150 is detachably mounted on the circumferential outer wall of the air inlet cylinder 110 by means of bolts, and the ultrasonic sensor 150 is arranged toward the vacuum furnace;

The detection tube 210 is a hollow cylindrical tube. The detection tube 210 is detachably mounted on the end of the first connecting ring 120 away from the air inlet tube 110 by bolts. The detection tube 210 and the air inlet tube 110 are sealed. The inner cavity of the detection tube 210 is connected with the inner cavity of the air inlet tube 110. External air enters the inner cavity of the detection tube 210 through the air inlet tube 110. The circumferential side wall of the inner cavity of the detection tube 210 is coated with a nano tungsten trioxide coating.

The observation tube 220a is a hollow regular hexagonal tube. The observation tube 220a is coaxially integrated in the inner cavity of the detection tube 210. The observation tube 220a is arranged along the axial direction of the detection tube 210. The top of the observation tube 220a passes through the top of the detection tube 210 and is flush with the top of the detection tube 210. The observation tube 220a is connected with the inner cavity of the detection tube 210. The air in the inner cavity of the detection tube 210 can enter the inner cavity of the observation tube 220a through the detection tube 210 and be discharged. The six corners of the observation tube 220a are all equipped with thermal imagers and cameras. The temperature change is detected by the thermal imager, and the color change of tungsten trioxide is observed by the camera.

The outer sealing ring 220b is integrally formed on the top of the outer side wall of the observation tube 220a, and the outer sealing ring 220b is a conical structure;

The second connecting ring 220c is integrally formed at the bottom of the inner cavity side wall of the observation tube 220a, and the second connecting ring 220c is a regular hexagonal cone. The inner sealing ring 220c-1 is integrally formed at the bottom of the second connecting ring 220c, and the inner sealing ring 220c-1 is a regular hexagon.

The exhaust duct 230 is integrally formed at the top of the detection tube 210. The exhaust duct 230 is connected with the inner cavity of the observation tube 220a. A fan is installed at one end of the exhaust duct 230. Air is blown into the inner cavity of the exhaust duct 230 by the fan. The inner cavity of the observation tube 220a is evacuated by using the Bernoulli principle. The Bernoulli principle is used to evacuate the air, so that the air intake is more stable and the turbulence is reduced. In this way, the inner cavity of the detection tube 210 is evacuated. When the detection tube 210 is in a vacuum state, the external air enters the inner cavity of the detection tube 210 through the air intake tube 110 driven by the vacuum suction. The hydrogen in the air reacts with the tungsten trioxide in the inner cavity of the detection tube 210 to generate heat. The heat is detected by a thermal imager. The change of the hydrogen content in the air is detected by the level of heat. The change of the hydrogen content in the ambient air can be effectively detected, thereby ensuring the safety of the working environment.

The connecting rod 310 is movably connected to the partition 140 through a linear bearing, and a sealing treatment is performed between the connecting rod 310 and the partition 140. The connecting rod 310 can move along the axial direction of the air intake cylinder 110 on the partition 140 through the linear bearing, and the connecting rod 310 is a hollow structure;

The limit plate 320 is detachably mounted on the end of the connecting rod 310 by bolts or threaded connections. The limit plate 320 is arranged at the lower end of the partition 140. The limit plate 320 is arranged in the inner cavity of the air intake cylinder 110. The limit plate 320 is driven by the connecting rod 310 to move along the axial direction of the air intake cylinder 110 in the inner cavity of the air intake cylinder 110. The spring 320a is welded on the top of the limit plate 320. The spring 320a is coaxially arranged with the connecting rod 310. The spring 320a is arranged at the lower end of the partition 140. The limit plate 320 drives the spring 320a to move. The limit plate 320 is reset by the cooperation of the spring 320a and the partition 140.

The piston 330 is integrally formed on the end of the connecting rod 310 away from the limit plate 320. The piston 330 is arranged in the inner cavity of the air intake cylinder 110. The piston 330 and the air intake cylinder 110 are sealed. The piston 330 can move in the inner cavity of the air intake cylinder 110 along the axial direction of the air intake cylinder 110 to enter the inner cavity of the detection cylinder 210. The piston 330 is hollow. The inner cavity of the piston 330 is connected with the inner cavity of the connecting rod 310. The inclined groove 330a is provided at the top of the circumferential side wall of the inner cavity of the piston 330. Since water is generated when hydrogen reacts with tungsten trioxide, the generated water enters the inner cavity of the piston 330 along the side wall of the detection cylinder 210. The setting of the inclined groove 330a reduces the residual water, and the water entering the inner cavity of the piston 330 is discharged through the connecting rod 310. A pipe is installed on the end of the connecting rod 310 facing the limit plate 320 through a threaded connection, and a sealing treatment is performed between the pipe and the connecting rod 310. A drain valve is installed on the end of the pipe away from the connecting rod 310. During the reaction of hydrogen and tungsten trioxide, the drain valve is in a closed state to prevent the air in the inner cavity of the detection cylinder 210 from being discharged from the connecting rod 310. After the reaction is completed, the drain valve is opened to drain water. The inner diameter of the piston 330 matches the outer diameter of the outer sealing ring 220b. When the piston 330 rises and contacts the outer sealing ring 220b, the piston 330 is clamped on the outer circumferential wall of the outer sealing ring 220b. A sealing treatment is performed between the piston 330 and the outer sealing ring 220b to prevent the air entering the inner cavity of the detection cylinder 210 from being discharged from the observation cylinder 220a.

The connecting rod 340 is integrally formed in the inner cavity of the piston 330. The top of the connecting rod 340 passes through the top of the piston 330 and is inserted into the inner cavity of the detection cylinder 210. The sealing plate 340a is detachably installed on the top of the connecting rod 340 by bolts or welded to the top of the connecting rod 340. The connecting rod 340 is inserted into the inner side of the inner sealing ring 220c-1, and a sealing treatment is performed between the connecting rod 340 and the inner sealing ring 220c-1.

Specifically, air is blown into the inner cavity of the exhaust duct 230 by the blower, and the inner cavity of the observation tube 220a is evacuated by the Bernoulli principle. The inner cavity of the observation tube 220a is in a negative pressure state, and the sealing plate 340a moves toward the inner cavity of the observation tube 220a under the suction force of the negative pressure, so that the sealing plate 340a is separated from the inner sealing ring 220c-1, and the air in the inner cavity of the detection tube 210 enters the inner cavity of the observation tube 220a through the gap between the sealing plate 340a and the inner sealing ring 220c-1 and is discharged from the exhaust duct 230, and the inner cavity of the detection tube 210 is evacuated. Driven by the negative pressure suction force, the piston 330 is driven to move toward the inner cavity of the detection tube 210, and the limit plate 320 is driven to move toward the partition 140 by the cooperation of the driving piston 330 and the connecting rod 310, so that the spring 320a contacts the partition 140 and is pressed against the inner cavity of the detection tube 210. The spring 320a is compressed until the piston 330 completely enters the inner cavity of the detection cylinder 210 and is sleeved on the circumferential outer wall of the outer sealing ring 220b, and the piston 330 is separated from the air inlet cylinder 110. Driven by the negative pressure in the inner cavity of the detection cylinder 210, the external air enters the inner cavity of the detection cylinder 210 through the air inlet cylinder 110. When the air pressure in the inner cavity of the detection cylinder 210 reaches one atmosphere, the piston 330 is driven to reset under the action of the air pressure in the inner cavity of the detection cylinder 210 and the elastic force of the spring 320a. The sealing plate 340a is driven to reset by the piston 330 to block the inner cavity of the observation cylinder 220a, so that the air in the inner cavity of the detection cylinder 210 is prevented from being discharged through the observation cylinder 220a. The hydrogen in the air reacts with the tungsten trioxide in the inner cavity of the detection cylinder 210 to generate heat. The heat is detected by a thermal imager, and the hydrogen content is judged by the level of heat.

Example 3

Please refer to Figures 1, 3 and 6. The mounting plate 420 is integrally formed on the side wall of the mounting frame 410. The mounting plate 420 is detachably mounted on the circumferential outer wall of the detection tube 210 by bolts. The pull ring 420a is welded on the top of the mounting plate 420. The pull ring 420a is connected to the electric hoist through a wire rope. The electric hoist is installed on the top of the wall of the workshop. The equipment is hoisted on the top of the interior of the workshop by the coordinated use of the electric hoist and the pull ring 420a, which is convenient for collecting hydrogen.

There are two guide frames 430, which are symmetrically arranged on the inner side of the mounting frame 410. The guide wheel 430a is movably installed on the inner side of the guide frame 430 toward the side away from the side wall of the mounting frame 410 through an axle pin, and the guide wheel 430a passes through the side wall of the guide frame 430.

The telescopic mechanism 440 is detachably mounted on the outer wall of the mounting frame 410 by bolts, and the telescopic end of the telescopic mechanism 440 passes through the side wall of the mounting frame 410 and is connected to the guide frame 430. The telescopic mechanism 440 includes but is not limited to a cylinder, a hydraulic cylinder and an electric push rod, preferably a hydraulic cylinder. The telescopic mechanism 440 drives the two guide frames 430 to move toward or oppositely. The telescopic mechanism 440 can change the distance between the two guide frames 430. The two guide frames 430 are clamped on both sides of the I-beam of the workshop steel frame structure. When the electric hoist and the pull ring 420a are pulling and stretching, the guide wheel 430a is used to ensure the smooth movement.

Example 4

The data preset module is used to execute and store the preset data parameters, which include the hydrogen content data at standard ambient temperature. , environmental volume data/> , color change area/> And the distance data from the ultrasonic wave to the center point/> , the processing module includes a calculation module, a comparison module and a control module, which are used to perform data calculation, comparison and output control commands for calculation and comparison results; the alarm module includes a wireless module and an audible and visual alarm, which are used to perform long-distance alarm and short-distance audible and visual alarm;

The operation steps of the concentration detection system are as follows:

S1: The hydrogen content in the air is different under different temperature environments. The current temperature in the workshop is collected through sensors, and the standard hydrogen content in the environment at the current temperature is obtained based on the temperature and hydrogen content change curve in the air. Indicates, /> is a variable, which changes according to the temperature in the current workshop. The hydrogen content within one cubic meter at the current temperature is obtained by calculation. The calculation formula is

Indicates the hydrogen content within one cubic meter at the current temperature;

S2: The air in the workshop is extracted into the inner cavity of the detection tube 210 by vacuum extraction. The hydrogen in the air entering the inner cavity of the detection tube 210 reacts with tungsten trioxide to generate heat. The higher the hydrogen concentration, the higher the temperature generated by the reaction. The temperature data generated by the reaction of hydrogen and tungsten trioxide is collected by a thermal imager and the data is transmitted to the calculation module. The calculation module calculates the hydrogen content in one cubic meter of air in the inner cavity of the detection tube 210. The calculation formula is

Indicates the hydrogen content in one cubic meter of air in the inner cavity of the detection tube 210, /> Indicates the temperature detected by thermal imaging, /> represents the volume of the detection cylinder 210;

S3: and/> Input into the comparison module for comparison;

when ≤/> When , no action is performed;

when When the alarm occurs, the control module controls the wireless module to send an alarm message to the staff, and at the same time controls the sound and light alarm to start. The sound and light alarm sounds an alarm at a frequency of once every 5 minutes.

when When the alarm is triggered, the control module controls the wireless module to send an alarm message to the staff, with an alarm frequency of once every 5 minutes. At the same time, the sound and light alarm is controlled to start, and the sound and light alarm is alarmed at a frequency of once every minute. The surrounding staff evacuate the workshop after receiving the alarm from the sound and light alarm;

when When the alarm is triggered, the control module controls the wireless module to send an alarm message to the staff, with an alarm frequency of once every 30 seconds. At the same time, the sound and light alarm is controlled to start, and the sound and light alarm is alarmed once every 5 seconds. After receiving the alarm from the sound and light alarm, the surrounding staff must completely evacuate the workshop within 5 minutes;

when When the alarm is triggered, the control module controls the wireless module to send an alarm message to the staff, with an alarm frequency of once every 5 seconds. In addition to the weak current supply to ensure that the wireless module continues to send out the alarm, all power supplies are turned off until they are manually turned on to prevent the electric sparks generated during the power-on process of the electrical equipment from igniting the hydrogen;

In order to ensure the accuracy of hydrogen detection, the present application also provides a camera, which is installed on the side wall of the observation tube 220a. The tungsten trioxide is connected to the external power supply through a wire, and the tungsten trioxide is energized in real time. The tungsten trioxide has electrochromic properties, and the remaining amount of tungsten trioxide is detected by the color change area generated after the tungsten trioxide is energized. It indicates the color change area of tungsten trioxide after electricity is applied, where/> Indicates the color change area of tungsten trioxide in the complete state,/> Indicates that there is still tungsten trioxide left/> Area, /> Indicates that there is still tungsten trioxide left/> Area, /> Indicates that there is still tungsten trioxide left/> The color change state of tungsten trioxide in the power-on state is photographed by a camera, and the photographed image data is transmitted to the staff's computer device through a wireless module. The image is processed by image software and the color change area of tungsten trioxide is calculated and sent back to the data preset module. When calculating the hydrogen content, the calculated structure is divided by / > , which is expressed as and/> , in the pair/> and/> The comparison is performed between the two, and the comparison result is used for alarm control in the manner of step S3, wherein /> Only for the 、/> and/> In this state, when the color change area of tungsten trioxide reaches/> When the tungsten trioxide coating is damaged, it is necessary to replace it in time.

Example 5

The positioning system includes a display screen for displaying the location of the leakage point;

The operation steps of the positioning system are as follows:

A1: The vacuum furnace is placed at the center of the workshop. The ultrasonic sensors are distributed around the vacuum furnace as shown in Figure 7. The distance from the ultrasonic sensor to the center of the vacuum furnace is marked as , starting from one of the ultrasonic sensors, numbered clockwise or counterclockwise as /> 、/> 、/> , ..., etc. are arranged in sequence, and the measured data of the distance from the ultrasonic sensor to the center position of the vacuum furnace is transmitted to the data preset module for storage;

A2: When hydrogen leaks, ultrasonic waves are generated at the leak point. The ultrasonic sensor detects the distance from the leak point to the ultrasonic sensor. The distance from the leak point to the ultrasonic sensor is marked as , install/> The marking order is marked as 、/> 、/> , ..., where/> Correspondence/> ,/> Correspondence/> ,/> Correspondence/> , and so on, the collected /> The data is transferred to the calculation module for calculation, formula/> , for example/> , ,/> , ..., and so on, the calculation results are input into the comparison module for cross comparison to locate the leakage point, and the comparison results are input into the display screen, which displays the graphics of the vacuum furnace and the location of the leakage point in the graphics of the vacuum furnace, which can assist the staff to quickly locate the location of the hydrogen leakage point, thereby ensuring the maintenance efficiency.

Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed by the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (10)

1. A hydrogen leak detection device based on thermal imaging, characterized in that it includes: Intake cylinder assembly (100); A detection cylinder assembly (200), wherein the detection cylinder assembly (200) is detachably connected to the air intake cylinder assembly (100), the inner cavities of the detection cylinder assembly (200) and the air intake cylinder assembly (100) are connected, the inner cavity of the detection cylinder assembly (200) is provided with a tungsten trioxide coating, the inner cavity of the detection cylinder assembly (200) is equipped with a thermal imager, the tungsten trioxide coating reacts with hydrogen to generate heat, the infrared receiving end of the thermal imager corresponds to the tungsten trioxide coating, and collects thermal reaction infrared signals for detecting hydrogen leakage; A sealing assembly (300), the sealing assembly (300) being movably connected to the air intake cylinder assembly (100) and the detection cylinder assembly (200) respectively; A mounting mechanism (400), the mounting mechanism (400) being connected to the detection cylinder assembly (200), and the mounting mechanism (400) being connected to an electric hoist; A detection system, wherein the detection system is arranged on the circumferential outer side wall of the detection cylinder assembly (200). 2. The hydrogen leakage detection device based on thermal imaging according to claim 1, characterized in that: the air intake cylinder assembly (100) comprises: Intake cylinder (110); A first connecting ring (120), the first connecting ring (120) being arranged at an end of the air intake cylinder (110); An air inlet (130), the air inlet (130) being arranged on an outer circumferential wall of the air inlet cylinder (110); a partition (140), the partition (140) being arranged in the inner cavity of the air intake cylinder (110), the partition (140) being arranged at the lower end of the air intake port (130); An ultrasonic sensor (150), wherein the ultrasonic sensor (150) is arranged on the circumferential outer side wall of the air intake cylinder (110). 3. The hydrogen leakage detection device based on thermal imaging according to claim 2, characterized in that: the detection cylinder assembly (200) comprises: A detection cylinder (210), the detection cylinder (210) being arranged at an end of the first connecting ring (120), the detection cylinder (210) being connected to the inner cavity of the air inlet cylinder (110) through the first connecting ring (120); An observation tube assembly (220), wherein the observation tube assembly (220) is arranged in the inner cavity of the detection tube (210); An exhaust duct (230), wherein the exhaust duct (230) is arranged at an end of the detection cylinder (210), and the exhaust duct (230) is connected to an inner cavity of the detection cylinder (210). 4. The hydrogen leakage detection device based on thermal imaging according to claim 3, characterized in that: the observation tube assembly (220) comprises: An observation tube (220a), the observation tube (220a) being coaxially arranged in the inner cavity of the detection tube (210), the observation tube (220a) being respectively connected to the inner cavity of the detection tube (210) and the exhaust pipe (230), and a camera being arranged on the side wall of the observation tube (220a); an outer sealing ring (220b), the outer sealing ring (220b) being arranged on the outer side wall of the observation tube (220a) and arranged in the inner cavity of the detection tube (210); A second connecting ring (220c), the second connecting ring (220c) being arranged on the inner cavity side wall of the observation tube (220a), the inner side wall of the second connecting ring (220c) being provided with an inner sealing ring (220c-1), the inner sealing ring (220c-1) penetrating the observation tube (220a) and being arranged in the inner cavity of the detection tube (210). 5. The hydrogen leakage detection device based on thermal imaging according to claim 4, characterized in that: the sealing assembly (300) comprises: A connecting rod (310), the connecting rod (310) being disposed in the inner cavity of the air intake cylinder (110) and movably connected to the partition plate (140), the connecting rod (310) being a hollow tube; a limit plate (320), the limit plate (320) being arranged at the end of the connecting rod (310), the limit plate (320) being arranged in the inner cavity of the air intake cylinder (110) and at the lower end of the partition plate (140), a spring (320a) being arranged on the side wall of the limit plate (320), and the spring (320a) being arranged at the lower end of the partition plate (140); A piston (330), the piston (330) being arranged at the end of the connecting rod (310), the piston (330) being arranged in the inner cavity of the air intake cylinder (110) and at the upper end of the partition (140), an inclined groove (330a) being provided at the end of the piston (330), and the piston (330) and the inner cavity of the connecting rod (310) being connected; A connecting rod (340), the connecting rod (340) being arranged in the inner cavity of the piston (330) and penetrating through the top of the piston (330) to be inserted into the inner cavity of the detection cylinder (210), a sealing plate (340a) being arranged at the end of the connecting rod (340), the sealing plate (340a) being movably connected to the inner sealing ring (220c-1). 6. The hydrogen leakage detection device based on thermal imaging according to claim 5, characterized in that: the mounting mechanism (400) comprises: A mounting frame (410), the mounting frame (410) being arranged outside the detection cylinder (210); a mounting plate (420), the mounting plate (420) being arranged on a side wall of the mounting frame (410) and connected to the detection cylinder (210), a pull ring (420a) being arranged on the side wall of the mounting plate (420); A guide frame (430), the guide frame (430) being arranged on the inner side of the mounting frame (410), a guide wheel (430a) being arranged on the inner side of the guide frame (430), the guide wheel (430a) penetrating a side wall of the guide frame (430) and being arranged on the inner side of the mounting frame (410); A telescopic mechanism (440), wherein the telescopic mechanism (440) is arranged on a side wall of the mounting frame (410), and a telescopic end on the telescopic mechanism (440) is connected to the guide frame (430). 7. A hydrogen leak detection device based on thermal imaging according to claim 6, characterized in that: the detection system comprises: A concentration detection system, used to detect the hydrogen concentration; Positioning system for locating hydrogen leaks. 8. A hydrogen leakage detection device based on thermal imaging according to claim 7, characterized in that: the concentration detection system comprises: The data preset module is used to execute and store the preset data parameters, including the hydrogen content data at the standard ambient temperature. , environmental volume data/> , color change area/> And the distance data from the ultrasonic wave to the center point/> ; A processing module, the processing module includes a calculation module, a comparison module and a control module, and is used to perform data calculation and comparison and output control commands based on the calculation and comparison results; The alarm module includes a wireless module and an audible and visual alarm, and is used to perform long-distance alarms and short-distance audible and visual alarms. 9. A hydrogen leakage detection device based on thermal imaging according to claim 8, characterized in that: the operation steps of the concentration detection system are as follows: S1: Obtain the standard hydrogen content in one cubic meter of environment through the calculation module ,/> ; S2: Ambient air enters the detection tube through the air inlet tube and reacts with the tungsten trioxide in the detection tube to generate heat. The temperature data is measured by a thermal imager. , will/> The hydrogen content in one cubic meter is obtained by calculating the hydrogen content in the current environment. ,/> ; S3: and/> The input is sent to the comparison module for comparison, and the control module outputs different control instructions based on the comparison results. 10. A hydrogen leak detection device based on thermal imaging according to claim 9, characterized in that: the positioning system comprises a display screen for displaying the position of the leak point; The operation steps of the positioning system are as follows: A1: Collect the distance data from the ultrasonic sensor to the center point through the ultrasonic sensor And will/> Input into the data preset module; A2: Collect the distance data from the ultrasonic sensor to the leak point through the ultrasonic sensor , calculate the closest distance to the ultrasonic sensor through the calculation module/> , will/> The data are transmitted to the display screen, and the location of the leakage point is displayed on the display screen.