Gas leakage detection device

Abstract

The utility model belongs to the technical field of gas leakage detection, and particularly relates to a gas leakage detection device. The pipeline detection problem that three-way joints, flange joints and the like are difficult to detect is effectively solved. Comprising a body unit, the body unit comprises an installation main plate, and two sides of the installation main plate are respectively provided with a supporting unit which is used for supporting the detection device and can move on a to-be-detected pipeline. A buckling unit is arranged at the bottom of the mounting main board, the buckling unit comprises an upper combination body and a lower combination body, the upper combination body and the lower combination body are both of a shell-shaped structure and are detachably connected through a connecting piece, and a sealed cavity is formed after the upper combination body and the lower combination body are buckled and connected; a hole channel for a pipeline to pass through is formed in each of the two ends of the sealed cavity; during use, a to-be-detected pipeline is clamped between the upper combination body and the lower combination body, and the two ends of the to-be-detected pipeline penetrate out of the two hole channels respectively.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas leakage detection, and particularly relates to a gas leakage detection device. Background Technique

[0002] In the production and processing process of iron and steel enterprises, a variety of gases are required, and these gases play important roles in different technological processes; many of them are combustible gases and toxic gases. For example: oxygen used for blowing in the converter steelmaking process, hydrogen used as a reducing agent and for directly reducing iron ore, carbon monoxide used in the heating and combustion processes, and carbon monoxide used in the reduction reaction in certain metallurgical processes, etc.

[0003] The types of gases used in steel mills are diverse, and each gas plays a unique role in different technological processes. For harmful gases, gas leakage is very dangerous. In iron and steel smelting production, gas source leakage may bring serious safety hazards and economic losses, affecting production efficiency and environmental safety. For example: after the leakage of combustible gases such as hydrogen and carbon monoxide, it is easy to explode when encountering an open flame or high temperature, causing serious casualties and property losses. And if toxic gases leak, it may lead to poisoning or even death of personnel, the production line is forced to stop, affecting the production progress. Leakage will also cause a large amount of gas loss, increase energy consumption, and raise production costs.

[0004] During pipeline transportation, leakage detection is an important means to prevent leakage. For gas transportation pipelines with different diameters, especially those with flange joints and tee joints, these places are often high-incidence points of leakage. However, for these key leakage-prone parts, the existing detection means lack effective detection. In order to meet the detection needs of these positions, it is urgent to design a detection device that can effectively complete the leakage detection work along the entire pipeline. Summary of the Invention

[0005] The utility model aims at the defects existing in the prior art and provides a gas leakage detection device.

[0006] To achieve the above object, the utility model adopts the following technical scheme. The gas leakage detection device includes: a body unit, the body unit includes an installation main board, and a support unit is installed on each side of the installation main board for supporting the detection device and being able to move on the pipeline to be detected.

[0007] A fastening unit is provided at the bottom of the installation main board. The fastening unit includes an upper body and a lower body. Both the upper body and the lower body are shell-like structures, and the two are detachably connected by a connecting member to form a sealed chamber after being fastened together. And a channel for a pipeline to pass through is formed at each end of the sealed chamber. During use, the upper body and the lower body clamp the pipeline to be detected between them, and both ends of the pipeline to be detected pass through the two channels respectively.

[0008] An air inlet hole is provided on the side wall of the upper body, and an air outlet hole is provided on the side wall of the lower body.

[0009] Further, a rubber sleeve connected to it is provided at the top of the upper body. When there is a leak in the three-way joint of the pipeline to be detected, the rubber sleeve is used to accommodate the three-way joint. And a central hole for reserving space for the rubber sleeve is provided on the installation main board.

[0010] Further, a width adjustment unit for adapting to pipelines to be detected with different diameters is provided on each side of the main body unit. Each width adjustment unit is connected to a clamping unit at each end, and the four clamping units are used to fix the detection device on the pipeline to be detected.

[0011] Further, both the left and right sides of the installation main board of the main body unit are set to be concave-shaped. A through guiding groove is also provided on the side surface of the concave shape for installing the width adjustment unit. A handle is also provided on the top of the installation main board for convenient operation and transportation by personnel. A cover plate for shielding the width adjustment mechanism is provided on each side of the top of the installation main board, and the cover plate is hinged to the installation main board.

[0012] Further, the width adjustment unit includes a sliding component, two left and right arms hinged to the sliding component, and a guiding bar hinged to the arms. And each arm corresponds to a guiding bar.

[0013] Among them, the sliding component includes a U-shaped guiding rail and a width adjustment slider located inside the U-shaped guiding rail. And at least two gear holes are provided along the length direction of the U-shaped guiding rail. The width adjustment slider is slidably connected to the U-shaped guiding rail and is locked and positioned by a locking pin. The locking pin passes through the width adjustment slider and then inserts into the corresponding gear hole to realize the positioning of the width adjustment slider.

[0014] The two arms clamp the U-shaped guiding rail in the middle. And the first end of each arm is hinged to the width adjustment slider, and the second end of each arm is hinged to the corresponding guiding bar. The U-shaped guiding rail is perpendicular to the guiding bar. By adjusting the position of the width adjustment slider in the U-shaped guiding rail, the purpose of driving the guiding bar to move back and forth along the guiding groove is achieved, thereby realizing width adjustment.

[0015] Further, the clamping unit includes linear electric cylinders. Among multiple linear electric cylinders, every two form a group and correspond to a width adjustment unit; one of the linear electric cylinders in each group corresponds to a guiding bar of the width adjustment unit; the cylinder base of the linear electric cylinder is fixedly connected to the end of the corresponding guiding bar of the width adjustment unit. The linear electric cylinder is installed downward, and a support plate is fixedly connected to the end of the cylinder rod of the linear electric cylinder. One side of the top of the support plate is fixedly connected to the cylinder rod, and a locking pin facing upward is installed on the other side of the top of the support plate.

[0016] Further, the support unit includes a support seat and a guiding shaft connected to the body unit. Specifically, the support seat is connected to the installation main board of the body unit.

[0017] A lifting motor is installed on the outer wall of the support seat. After one end of the guiding shaft passes through the guiding hole of the support seat, the passing-through end is connected to a U-shaped bracket. And the shape of the guiding hole matches that of the guiding shaft for axially limiting the guiding shaft.

[0018] Traveling wheels are installed on the U-shaped bracket; a gear is arranged inside the support seat. The output shaft of the lifting motor extends into the support seat and is connected to the gear for driving the gear to rotate; the gear is meshed with the guiding shaft; when the gear rotates, it drives the guiding shaft to move up and down along the guiding hole, driving the traveling wheels to move up and down.

[0019] Further, the air inlet hole of the fastening unit is connected to an air pump unit. The air pump unit is used to fill air or nitrogen into the sealed chamber through the air inlet hole; the air outlet hole is communicated with a detection and control unit. The detection and control unit is used to analyze the gas components discharged from the air outlet hole to determine whether there is leakage.

[0020] Further, a cylindrical magnetic buckle is arranged on the top of the upper combination body, and a positioning magnetic suction head is arranged at the bottom of the body unit. The cylindrical magnetic buckle is attracted to the positioning magnetic suction head to fix the fastening unit on the body unit in position.

[0021] A positioning pin is arranged at the bottom of the upper combination body, and a positioning hole corresponding to the positioning pin is arranged at the top of the lower combination body. When the upper and lower combination bodies are fastened, the positioning pin is located in the positioning hole to realize accurate fastening between the upper and lower combination bodies; and after fastening, the upper and lower combination bodies are sealed through a sealing rubber strip.

[0022] A positioning pin hole is arranged at the bottom of the lower combination body. The positioning pin hole is adapted to the locking pin of the clamping unit. During detection, the locking pin is stuck in the corresponding positioning pin hole to realize that the fastening unit hugs the pipeline to be detected.

[0023] The gas leakage detection method is based on the above-mentioned gas leakage detection device. The detection method includes the steps:

[0024] S1. The fastening unit has pore channels of different specifications. Select a fastening unit that matches according to the diameter of the pipeline to be detected;

[0025] S2. Support the main body unit above the pipeline to be detected through the traveling wheels on the support unit, and drag the detection device along the pipeline using the handle on the mounting main board to the position where detection is required;

[0026] S3. Control the lifting motor in the support unit to drive the guide shaft to move up and down, so that the upper body fits against the surface of the pipeline to be detected;

[0027] S4. Manually fasten the lower body to the upper body from below the pipeline to form a sealed chamber. At this time, the upper body and the lower body are accurately aligned through the positioning pins and positioning holes and are kept sealed by the sealing rubber strip;

[0028] S5. Control the linear electric cylinder in the clamping unit to insert the locking pin into the positioning pin hole at the bottom of the lower body, thereby fixing the clamping unit to the pipeline to be detected;

[0029] S6. Control the lifting motor of the support unit again to make the traveling wheels disengage from the pipeline, ensuring that the entire detection device is firmly clamped to the pipeline;

[0030] S7. Start the air pump unit, and fill the sealed chamber with air or nitrogen through the air inlet hole until the original gas is completely discharged;

[0031] S8. The detection control unit analyzes the gas components discharged from the air outlet hole to determine whether there is leakage;

[0032] S9. After completing the detection of a certain section of the pipeline, control the linear electric cylinder to release the locking pin to disengage the lower body from the pipeline. At the same time, control the lifting motor of the support unit to make the traveling wheels support above the pipeline again, so as to move the detection device to the next detection position;

[0033] S10. Repeat the above steps until all the pipeline sections that need to be detected are completed.

[0034] Beneficial effects of the present utility model compared with the prior art.

[0035] The gas leakage detection device of the present utility model uses the upper body and the lower body to enclose the conveying pipeline to form a sealed cavity, which can detect the gas content of the pipeline with flanges to detect pipeline leakage. And a rubber sleeve is installed at the upper end of the upper body of the gas leakage detection device, which can achieve the purpose of detecting leakage at the position of the pipeline with three-way joints, effectively solving the problem of difficult detection of three-way joints, flange joints, etc. At the same time, width adjustment units are installed at both ends of the gas leakage detection device, which can use upper and lower bodies with different widths according to the detection of pipelines with different diameter models, for the purpose of width adjustment to adapt to the sizes of upper and lower bodies with different sizes. Description of the Drawings

[0036] The following further describes the present utility model in conjunction with the accompanying drawings and specific embodiments. The protection scope of the present utility model is not limited to the description of the following content.

[0037] Figure 1 is the three-dimensional view of the gas leakage detection device and its detection method in the embodiment Figure 1 .

[0038] Figure 2 is the three-dimensional view of the gas leakage detection device and its detection method in the embodiment Figure 2 .

[0039] Figure 3 is the three-dimensional view of the fastening unit of the gas leakage detection device and its detection method in the embodiment.

[0040] Figure 4 is the front view of the fastening unit of the gas leakage detection device and its detection method in the embodiment.

[0041] Figure 5 is the sectional view of the fastening unit of the gas leakage detection device and its detection method fastened on the pipeline in the embodiment.

[0042] Figure 6 is the three-dimensional view of the upper body of the gas leakage detection device and its detection method in the embodiment.

[0043] Figure 7 is the three-dimensional view of the lower body of the gas leakage detection device and its detection method in the embodiment.

[0044] Figure 8 is the schematic diagram of the body unit of the gas leakage detection device and its detection method in the embodiment.

[0045] Figures 9 - 11 is the schematic diagram of the connection between the body unit of the gas leakage detection device and its detection method and other units in the embodiment.

[0046] Figure 12 is the three-dimensional view of the width adjustment unit of the gas leakage detection device and its detection method in the embodiment Figure 1 .

[0047] Figure 13 is the three-dimensional view of the width adjustment unit of the gas leakage detection device and its detection method in the embodiment Figure 2 .

[0048] Figure 14 is the three-dimensional view of the support unit of the gas leakage detection device and its detection method in the embodiment.

[0049] Figure 15 is the front view of the support unit of the gas leakage detection device and its detection method in the embodiment.

[0050] Figure 16It is a schematic diagram of the connection between the air inlet of the embodiment detection control unit and the air outlet of the fastening unit.

[0051] In the figure, 1 is the main body unit; 2 is the detection control unit; 3 is the air pump unit; 4 is the support unit; 5 is the width adjustment unit; 6 is the clamping unit; 7 is the fastening unit; 8 is the pipeline to be detected; 101 is the installation main board; 102 is the central hole; 103 is the handle; 104 is the cover plate; 105 is the guide groove; 106 is the positioning magnetic head; 107 is the air pipe; 401 is the support seat; 402 is the gear; 403 is the guide shaft; 404 is the tooth part; 405 is the lifting motor; 406 is the walking wheel; 407 is the U-shaped bracket; 408 is the support shaft; 409 is the guide hole; 501 is the guide bar; 502 is the support arm; 503 is the U-shaped guide rail; 504 is the gear position hole; 505 is the locking pin; 506 is the pin shaft; 507 is the earring; 508 is the width adjustment slider; 601 is the linear electric cylinder; 602 is the support plate; 603 is the locking pin; 701 is the upper combination body; 702 is the lower combination body; 703 is the magnetic buckle; 704 is the positioning pin hole (locking pin hole); 705 is the rubber sleeve; 706 is the air inlet; 707 is the air outlet; 708 is the positioning pin; 709 is the positioning hole; 710 is the sealing strip; 711 is the semi-circular opening; 801 is the three-way joint; 802 is the flange joint. Detailed implementation manners

[0052] To better understand the technical solution of the present invention, the following specific implementation schemes are provided; and the following schemes are only for illustration.

[0053] As Figures 1 - 16As shown in the figure, the gas leakage detection device of the present utility model includes: a main body unit 1, and the main body unit 1 includes a mounting main board 101. On both sides of the mounting main board 101, a support unit 4 is installed respectively, which is used to support the detection device and can move on the pipeline 8 to be detected. At the bottom of the mounting main board 101, a fastening unit 7 is provided. The fastening unit 7 includes an upper fitting body 701 and a lower fitting body 702. Both the upper fitting body 701 and the lower fitting body 702 are shell-like structures, and the two are detachably connected by a connecting piece and form a sealed chamber after being fastened together; and at both ends of the sealed chamber, a hole for the pipeline 8 to pass through is formed respectively; that is: both the upper fitting body 701 and the lower fitting body 702 are provided with semi-circular openings 711, and the size of the semi-circular opening is designed to match a pipeline with a specific diameter so as to be able to closely fit on the surface of the pipeline. When in use, the upper fitting body 701 and the lower fitting body 702 clamp the pipeline 8 to be detected between the two, and both ends of the pipeline to be detected pass out through the two holes respectively. An air inlet hole 706 is provided on the side wall of the upper fitting body 701, and an air outlet hole 707 is provided on the side wall of the lower fitting body 702. The air inlet hole 706 of the fastening unit 7 is connected to an air pump unit 3, and the air pump unit 3 is used to fill nitrogen into the sealed chamber through the air inlet hole 706; the air outlet hole 707 is communicated with a detection and control unit 2, and the detection and control unit 2 is used to analyze the gas components discharged from the air outlet hole to determine whether there is a leakage.

[0054] The gas leakage detection device establishes a sealed chamber, continuously fills the chamber with clean test gas (such as air or nitrogen) by using an air pump unit, and then analyzes the components of the gas discharged from the air outlet to determine whether there is a leakage. It ensures the purity of the detection environment, excludes the interference of external factors, and can capture trace leaks in time, thereby improving the accuracy and reliability of the detection. Specifically, after the upper fitting body and the lower fitting body are fastened together, a sealed chamber is formed, and the pipeline to be detected is clamped therein. The air pump unit continuously fills the chamber with test gas through the air inlet hole, gradually replacing the original gas in the pipeline to ensure that any leaked gas can be clearly detected. The detection and control unit then analyzes the components of the gas discharged from the air outlet hole. If components different from the test gas are detected, it indicates that there is a leakage. This method can not only achieve dynamic monitoring and real-time feedback of the leakage situation, but also greatly reduce the possibility of false alarms, and is applicable to the detection of various types of combustible gases or harmful gases.

[0055] Embodiment 1: A rubber sleeve is provided at the top of the upper fitting body 701 and is communicated with the upper fitting body; when there is a leakage in the three-way joint of the pipeline to be detected, the rubber sleeve is used to accommodate the three-way joint; and a central hole 102 for reserving space for the rubber sleeve is opened on the mounting main board 101. The rubber sleeve adopts a rubber bellows structure and is integrally formed with the upper fitting body, which is convenient for detecting the leakage of the three-way joint pipeline. As Figure 5As shown, they are respectively the assemblies of the pipe with a flange joint and the pipe with a tee joint. When detecting the tee joint pipe, the top of the tee joint extends into the rubber sleeve, and this setting can ensure the leak detection of the pipe with a tee joint.

[0056] Embodiment 2: Both the left and right sides of the installation main board 101 of the body unit 1 are set to be concave-shaped. A through guiding groove 105 is also opened on the side of the concave shape for installing the width adjustment unit 5; a handle 103 is further provided on the top of the installation main board 101 to facilitate personnel operation and transportation; two covers 104 for shielding the width adjustment mechanism are respectively provided on both sides of the top of the installation main board 101, and the cover 104 is hinged to the installation main board 101. In the handheld mode, the structure is small and flexible, and it can be carried manually to detect the pipelines along the road.

[0057] Embodiment 3: A width adjustment unit 5 for adapting to pipes 8 to be detected with different diameters is further provided on both sides of the body unit 1. Each width adjustment unit 5 is connected with two clamping units 6 at both ends. The four clamping units 6 are used to fix the detection device on the pipe 8 to be detected. The width adjustment unit 5 includes a sliding component, two left and right support arms 502 hinged to the sliding component, and a guiding bar 501 hinged to the support arm 502; and each support arm 502 corresponds to a guiding bar 501; wherein, the sliding component includes a U-shaped guiding rail 503 and a width adjustment slider 508 located in the U-shaped guiding rail 503. At least two gear holes 504 are provided along the length direction of the U-shaped guiding rail 503. The width adjustment slider 508 is slidably connected with the U-shaped guiding rail 503 and is locked and positioned by a locking pin 505. The locking pin 505 passes through the width adjustment slider 508 and then inserts into the corresponding gear hole 504 to realize the positioning of the width adjustment slider 508; the two support arms 502 sandwich the U-shaped guiding rail 503 in the middle, and the first end of each support arm 502 is hinged to the width adjustment slider 508, and the second end of each support arm 502 is hinged to the corresponding guiding bar 501; the U-shaped guiding rail 503 is perpendicular to the guiding bar 501. By adjusting the position of the width adjustment slider 508 in the U-shaped guiding rail 503, the purpose of driving the guiding bar 501 to move back and forth along the guiding groove 105 is achieved, and thus the width adjustment is realized. The specific hinged installation method is: a pin shaft 506 is rotatably connected to the end of the support arm, and the pin shaft 506 is connected with the guiding bar 501 through an earring 507. The earring is rotatably sleeved on the pin shaft, and the side of the earring is fixedly connected with the guiding bar. During installation, the guiding bar 501 is located in the guiding groove 105 of the body unit 1 and can move back and forth along the groove; the end of the guiding bar 501 is connected with the corresponding linear electric cylinder 601 of the clamping unit 6.

[0058] The operation process is as follows: Manually operate the locking pin to drive the width adjustment slider to slide in the U-shaped guide. When it slides to the appropriate position, turn the locking pin so that the lower end of the locking pin inserts into the corresponding gear hole, and the locking work is realized. During the sliding process of the width adjustment slider, the support arm is driven to push the guiding bar to slide in the guiding groove of the body unit.

[0059] The connection relationship is as follows: The U-shaped guide is fixedly connected to the corresponding position of the main body unit. A width-adjusting slider is placed inside the U-shaped guide. A locking pin that can be manually operated is installed at the upper end of the width-adjusting slider. The locking pin is threadedly connected to the width-adjusting slider, and the lower end of the locking pin can be inserted into the gear hole through the width-adjusting slider. Ears are fixedly connected to both sides of the width-adjusting slider for rotatably connecting with the support arm through a pin shaft. An ear is also provided at one end of the guide bar for rotatably connecting with the other end of the support arm through a pin shaft.

[0060] In addition, the clamping unit 6 includes a linear electric cylinder 601. Among the 4 linear electric cylinders 601, 2 linear electric cylinders 601 form a group and correspond to a width-adjusting unit 5; one of the linear electric cylinders 601 in each group of linear electric cylinders 601 corresponds to a guide bar 501 of the width-adjusting unit 5; the cylinder base of the linear electric cylinder 601 is fixedly connected to the end of the corresponding guide bar 501 of the width-adjusting unit 5. The linear electric cylinder 601 is installed downward, and a support plate 602 is fixedly connected to the end of the cylinder rod of the linear electric cylinder 601. One side of the top of the support plate 602 is fixedly connected to the cylinder rod, and a locking pin 603 facing upward is installed on the other side of the top of the support plate 602. Moreover, a positioning pin hole 704 is provided at the bottom of the lower body 702, and the positioning pin hole 704 is adapted to the locking pin 603 of the clamping unit 6. During detection, the locking pin 603 is stuck in the corresponding positioning pin hole 704 to realize that the clamping unit 7 is tightly held on the pipeline to be detected.

[0061] Specifically, the coordinated operation of the width-adjusting unit and the clamping unit ensures that the entire detection device can closely fit the surface of the pipeline, forming a good sealing environment. This provides a pure detection condition for subsequent gas component analysis and improves the accuracy of the detection results. Among them:

[0062] First, the design of the width-adjusting unit 5 enables the detection device to flexibly adjust its width to adapt to pipelines 8 to be detected with different diameters. This flexibility greatly expands the application range of the device, making it applicable not only to standard-sized pipelines but also to unconventional or special-sized pipelines.

[0063] Second, the clamping unit 6 accurately inserts the locking pin 603 into the positioning pin hole 704 of the lower body 702 through the linear electric cylinder 601, ensuring that the clamping unit 7 is firmly held on the pipeline to be detected. This tight fixing method greatly improves the safety of the detection process and prevents accidents caused by loosening.

[0064] Third, when the electric cylinder 601 operates and the cylinder rod extends, a reserved space is provided for placing the lower body. When the lower body is manually placed in place, the cylinder rod retracts, and the cylinder rod drives the support plate to move upward. At this time, the locking pin moves upward and is inserted into the pin hole of the lower body during the upward movement. The cylinder rod continues to move upward to realize the clamping of the pipeline by the lower body and the upper body (at this time, the traveling wheels should be separated from the contact with the pipeline).

[0065] IV. The design of the rubber sleeve can not only accommodate the irregularly shaped tee joint, but also play a buffering role during the detection process to protect the pipeline and the detection equipment from mechanical damage.

[0066] Embodiment 4: The support unit 4 includes a support seat 401 and a guide shaft 403 connected to the main body unit 1. Specifically, the support seat is connected to the installation main board of the main body unit; a lifting motor 405 is installed on the outer wall of the support seat 401. After one end of the guide shaft 403 passes through the guide hole 409 of the support seat 401, the protruding end is connected to the U-shaped bracket 407, and the shape of the guide hole 409 is adapted to the guide shaft 403 for axial limit of the guide shaft; a walking wheel 406 is installed on the U-shaped bracket 407; a gear 402 is arranged inside the support seat 401. The output shaft of the lifting motor 405 extends into the support seat 401 and is connected to the gear 402 for driving the gear to rotate; the gear 402 is meshed with the guide shaft 403; the rotation of the gear drives the guide shaft 403 to move up and down along the guide hole, driving the walking wheel to move up and down. Specifically, a tooth part is arranged longitudinally on one side of the guide shaft, and the tooth part is meshed with the gear. Because of the non-full-circle teeth, the self-rotation of the guide shaft can be prevented. The support units are installed at the front and rear ends of the utility model, which can realize the support of the equipment on the pipeline. At the same time, it can walk on the pipeline under manual dragging, facilitating the movement and transfer of the equipment.

[0067] Embodiment 5: A cylindrical magnetic buckle 703 is arranged at the top of the upper body 701, and a positioning magnetic head 106 is arranged at the bottom of the main body unit 1. The cylindrical magnetic buckle 703 is attracted to the positioning magnetic head 106 to realize the positioning and fixing of the buckling unit 7 on the main body unit 1; (Specifically, a groove is arranged at the end of the cylindrical head of the positioning magnetic head, and a permanent magnet is installed in the groove for easy attraction.) A positioning pin 708 is arranged at the bottom of the upper body 701, and a positioning hole 709 corresponding to the positioning pin 708 is arranged at the top of the lower body 702. When the upper body 701 and the lower body 702 are buckled, the positioning pin 708 is located in the positioning hole 709 to realize the accurate buckling between the upper and lower bodies; and after buckling, the upper and lower bodies are sealed through a sealing strip. Specifically, the dual guarantee mechanism of magnetic connection and mechanical positioning ensures that even under vibration or other external forces, the buckling unit will not accidentally become loose, ensuring the safety of the detection process. This is particularly important for pipelines transporting combustible gases or harmful gases, and can effectively prevent potential safety risks.

[0068] Generally speaking, through multiple designs such as magnetic connection, precise positioning and sealing strip, the buckling unit enhances the connection stability and sealing performance between the buckling unit and the main body unit, simplifies the operation process, and improves the safety and accuracy of detection.

[0069] The steps and working principle of the gas leakage detection method are as follows:

[0070] S1. For the gas pipeline to be detected, select the specification of the fastening unit that matches the pipeline diameter (the radius of the semi-circular opening on the fastening unit should be the same as the radius of the pipeline to be detected). The model specifications of the fastening unit are designed to match the common pipe diameters.

[0071] S2. Magnetic buttons (4 are evenly distributed on the upper surface of the upper body) are provided on the upper end surface of the upper body of the fastening unit and cooperate with the positioning magnetic heads (4 are evenly distributed at the lower end of the mounting main board) for suction and fixation, so that the upper body can be fixed on the mounting main board.

[0072] S3. Manually hold the handle, place the body unit together with the upper body unit above the pipeline to be measured, and support the walking wheels of the support unit above the pipeline to play a role in supporting the detection device body. The operator can drag the detection unit to walk on the pipeline to be detected by holding the handle and drag the entire detection unit to the position where detection is required.

[0073] S4. Control the lifting motor of the support unit to act, drive the guide shaft to move up and down through the lifting motor, so that the upper body and the pipeline reach the appropriate position (the semi-circular opening of the upper body is combined with the pipeline surface).

[0074] S5. At this time, the operator buckles the lower body unit from the lower end of the pipeline upwards with the upper body unit to achieve the purpose of buckling the upper body and the lower body units.

[0075] S6. Then control the linear cylinder, retract the linear cylinder rod, so that the locking pin is inserted into the positioning pin hole on the lower body to realize the locking of the lower body unit by the locking pin.

[0076] S7. After the locking pin is inserted into the locking pin hole of the lower body, it means that the lower body has been combined with the upper body into one. At this time, control the walking wheels of the support unit to rise so that the walking wheels are separated from the pipeline.

[0077] S8. The entire detection unit is held on the detected pipeline by the upper body and the lower body.

[0078] S9. Control the linear cylinder to continue to retract the cylinder rod upwards. During the retraction process, make the upper body and the lower body hold the pipeline tightly (the linear cylinder is set with the value of the retraction force).

[0079] S10. At this time, a sealed chamber is formed in the pipeline covered between the upper body and the lower body, preventing the gas from flowing between the inside and outside of the covered chamber.

[0080] S11. At this time, start the air pump unit. The air pump unit fills nitrogen into the sealed chamber through the air inlet hole. The newly entered nitrogen expels the gas in the chamber from the air outlet. After the air pump works for a certain period of time (the purpose is to expel all the original gas in the sealed chamber), enter the detection link.

[0081] S12. At this time, the air pump continuously fills the gas into the sealed chamber, and the gas from the air outlet of the sealed chamber enters the detection and control unit. The detection and control unit analyzes the components of the gas to confirm whether there are components of leaked gas in the gas, so as to confirm whether there is a leak.

[0082] S13. After a certain section of detection is completed, the rod of the linear electric cylinder extends, so that the lower body is separated from the pipeline. Control the lifting motor of the support unit, and drive the guide shaft to move downward through the lifting motor, so that the upper body is separated from the pipeline surface, and the entire detection device is supported by the walking wheels above the pipeline. Then, the operator drags the detection unit to walk on the pipeline to be detected by holding the handle, and drags the entire detection unit to the next position to be detected.

[0083] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; therefore, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope defined by the claims of the present invention.

Claims

1. A gas leakage detection device, comprising a main body unit (1), characterized in that, The body unit (1) includes a mounting main board (101), and a support unit (4) is installed on each side of the mounting main board (101) for supporting the detection device and capable of moving on the pipeline (8) to be detected; A fastening unit (7) is arranged at the bottom of the mounting main board (101). The fastening unit (7) includes an upper body (701) and a lower body (702). Both the upper body (701) and the lower body (702) are shell-like structures, and the two are detachably connected by a connecting member to form a sealed chamber after being fastened together; and a passage for the pipeline (8) to pass through is formed at each end of the sealed chamber; during use, the upper body (701) and the lower body (702) clamp the pipeline (8) to be detected between the two, and both ends of the pipeline to be detected pass out through the two passages respectively; An air inlet hole (706) is arranged on the side wall of the upper body (701), and an air outlet hole (707) is arranged on the side wall of the lower body (702).

2. The gas leakage detection device according to claim 1, wherein A rubber sleeve communicated with the upper body (701) is arranged at the top of the upper body (701); when there is a leak in the tee joint of the pipeline to be detected, the rubber sleeve is used to accommodate the tee joint; and a central hole (102) for reserving space for the rubber sleeve is formed on the mounting main board (101).

3. The gas leakage detection device according to claim 1, wherein, A width adjustment unit (5) for adapting to pipelines (8) to be detected with different diameters is also arranged on each side of the body unit (1). Each width adjustment unit (5) is connected with a clamping unit (6) at each end, and the four clamping units (6) are used to fix the detection device on the pipeline (8) to be detected.

4. The gas leakage detection device according to claim 1, characterized in that The left and right sides of the mounting main board (101) of the body unit (1) are both arranged in a concave shape, and a through guiding groove (105) is also formed on the side surface of the concave shape for installing the width adjustment unit (5); a handle (103) is also arranged at the top of the mounting main board (101) to facilitate operation and transportation by personnel; a cover plate (104) for shielding the width adjustment mechanism is arranged on each side at the top of the mounting main board (101), and the cover plate (104) is hinged to the mounting main board (101).

5. The gas leakage detection device according to claim 4, wherein, The width adjustment unit (5) includes a sliding component, two left and right support arms (502) hinged to the sliding component, and a guiding bar (501) hinged to the support arms (502); and each support arm (502) corresponds to a guiding bar (501); Among them, the sliding component includes a U-shaped guiding rail (503) and a width adjustment slider (508) located in the U-shaped guiding rail (503). At least two gear holes (504) are arranged along the length direction of the U-shaped guiding rail (503). The width adjustment slider (508) is slidably connected with the U-shaped guiding rail (503) and is locked and positioned by a locking pin (505). The locking pin (505) passes through the width adjustment slider (508) and then inserts into the corresponding gear hole (504) to realize the positioning of the width adjustment slider (508); The two support arms (502) clamp the U-shaped guiding rail (503) in the middle. The first end of each support arm (502) is hinged to the width adjustment slider (508), and the second end of each support arm (502) is hinged to the corresponding guiding bar (501); During installation, the guide bar (501) is located in the guide groove (105) of the main body unit (1) and can move forward and backward along the groove; the end of the guide bar (501) is connected to the linear electric cylinder (601) corresponding to the clasping unit (6).

6. The gas leakage detection device according to claim 5, wherein The embracing unit (6) includes a linear electric cylinder (601), the electric cylinder base of the linear electric cylinder (601) is fixedly connected to the end of the guide bar (501) of the corresponding width adjustment unit (5), the linear electric cylinder (601) is installed downward, the end of the cylinder rod of the linear electric cylinder (601) is fixedly connected to a support plate (602), one side of the top of the support plate (602) is fixedly connected to the cylinder rod, and the other side of the top of the support plate (602) is installed with an upward locking pin (603).

7. The gas leakage detection device according to claim 1, characterized in that, The support unit (4) includes a support base (401) connected to the main body unit (1) and a guide shaft (403). A lifting motor (405) is installed on the outer wall of the support base (401). One end of the guide shaft (403) passes through a guide hole (409) of the support base (401), and the protruding end is connected to a U-shaped bracket (407). The shape of the guide hole (409) is adapted to the guide shaft (403) and is used for axial positioning of the guide shaft. A walking wheel (406) is mounted on the U-shaped bracket (407); a gear (402) is provided in the support seat (401); an output shaft of the lifting motor (405) extends into the support seat (401), and the output shaft is connected to the gear (402) for driving the gear to rotate; the gear (402) is meshed with the guide shaft (403); the rotation of the gear drives the guide shaft (403) to move up and down along the guide hole, thereby driving the walking wheel to move up and down.

8. The gas leakage detection device according to claim 1, characterized in that, The air inlet (706) of the snap-fit unit (7) is connected to an air pump unit (3), and the air pump unit (3) is used to fill the sealed chamber with air or nitrogen through the air inlet (706); the air outlet (707) is connected to a detection control unit (2), and the detection control unit (2) is used to analyze the gas composition discharged from the air outlet to determine whether there is a leak.

9. The gas leakage detection device according to claim 3, characterized in that, The top of the upper body (701) is provided with a cylindrical magnetic buckle (703), and the bottom of the main body unit (1) is provided with a positioning magnetic suction head (106). The cylindrical magnetic buckle (703) and the positioning magnetic suction head (106) are attracted to each other, so that the buckle unit (7) is positioned and fixed on the main body unit (1); The bottom of the upper body (701) is provided with a positioning pin (708), and the top of the lower body (702) is provided with a positioning hole (709) corresponding to the positioning pin (708). When the upper body (701) and the lower body (702) are fastened together, the positioning pin (708) is located in the positioning hole (709), so that the upper and lower bodies are accurately fastened together; and after fastening, the upper and lower bodies are sealed by a sealing strip. A positioning pin hole (704) is provided at the bottom of the lower body (702), and the positioning pin hole (704) is adapted to the locking pin (603) of the clasping unit (6). During detection, the locking pin (603) is locked in the corresponding positioning pin hole (704), so as to enable the clasping unit (7) to be tightly attached to the pipeline to be detected.

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