Air leakage detection instrument and working method thereof

Abstract

The invention discloses an air leakage detection instrument and a working method thereof, the air leakage detection instrument comprises a leak detector, a universal pipe, a length adjusting device, an angle adjusting device and a detection head, the universal pipe is installed on the leak detector through a first end, the length adjusting device is installed at a second end of the universal pipe, the angle adjusting device is installed on the length adjusting device, and the detection head is installed on the universal pipe. The detection head is mounted on the angle adjusting device; when air leakage detection is carried out, the length and the angle of the detection head are adjusted under the action of the length adjusting device and the angle adjusting device, so that different detection points are detected; the working method is based on the air leakage detection instrument. The beneficial effects of the invention are that the detection head can be flexibly adjusted during the gas leakage detection of the pipeline, thereby achieving the accurate detection of different positions, especially for a gas pipeline located at a corner or deep in a household kitchen, greatly reducing the detection difficulty, and improving the detection efficiency.

Description

Technical Field

[0001] This application relates to the technical field of air leakage detection equipment, and particularly relates to an air leakage detection instrument and its working method. Background Art

[0002] Natural gas is usually transported through gas pipelines. The gas pipelines may have the possibility of leakage due to reasons such as aging. Natural gas is a flammable gas. Therefore, if natural gas leaks, it may cause serious fire and explosion accidents. On the other hand, natural gas is a harmful gas, and inhaling it may cause personal injury or death accidents. Therefore, professionals will regularly visit to detect air leakage in the pipelines, especially at the flange joints of the pipelines.

[0003] Existing detectors include an instrument body, a universal pipe, and a probe. That is, by adjusting the universal pipe, the probe is extended to a suitable position for detection. The gas pipelines in homes are generally installed inside the kitchen counter. Especially, some pipelines are located at the corners or deep inside the counter. Therefore, when the staff is detecting, they not only need to bend down to work, but also it is not easy to find a suitable detection point, which increases the difficulty of the detection work. For this reason, an air leakage detection instrument and its working method are proposed to solve the above technical problems. Summary of the Invention

[0004] One of the purposes of this application is to provide an air leakage detection instrument.

[0005] Another purpose of this application is to provide a working method of an air leakage detection instrument.

[0006] To achieve the above purposes, the technical solution adopted in this application is: an air leakage detection instrument, including a leak detector, a universal pipe, a length adjustment device, an angle adjustment device, and a detection head. The universal pipe is installed at the leak detector through the first end. The length adjustment device is installed at the second end of the universal pipe. The angle adjustment device is installed at the length adjustment device. The detection head is installed at the angle adjustment device. When detecting air leakage, the detection head is adjusted in length and angle under the action of the length adjustment device and the angle adjustment device, so as to detect different detection points.

[0007] Preferably, the length adjustment device includes a plurality of sleeves. The adjacent sleeves are sleeved and sealed with each other to form a multi-section telescopic structure. The uppermost sleeve is connected to the angle adjustment device. The lowermost sleeve is installed at the second end of the universal pipe and is connected and cooperated with the gas source in the leak detector. When adjusting the length, the gas source is adapted to adjust the telescopic movement of the sleeve by compressed gas.

[0008] Preferably, the angle adjusting device includes a ball seat, a ball head pin and a plurality of telescopic devices. The spherical head of the ball head pin is engaged with the ball seat. The detection head is mounted on the connecting rod of the ball head pin through a mounting plate. The telescopic device is ball-jointed to the top end of the ball seat, and the piston end of the telescopic device is ball-jointed to the bottom end of the mounting plate. When adjusting the angle, the plurality of telescopic devices are adapted to perform telescopic actions so that the detection head rotates and adjusts under the action of the ball head pin.

[0009] Preferably, the detection head is adapted to communicate with the air source sequentially through the hollow ball head pin, the sleeve and the universal pipe. When performing detection, the detection head is adapted to perform air extraction detection under the action of the air source. The length adjusting device further includes a plurality of sleeve rods, the sleeve rods are connected to the corresponding sleeves, and adjacent sleeve rods are hermetically sleeved. The lowermost sleeve rod is connected to the air source, and the air source is adapted to realize the telescopic movement adjustment of the sleeve rod by compressed gas.

[0010] Preferably, the number of the sleeves is at least three, and the diameters of the sleeves decrease sequentially from bottom to top. A channel is provided at the bottom end of the sleeve rod, and a sealing block is elastically slidably arranged in the channel. When adjusting the length, the sleeves are adapted to sequentially extend upward from bottom to top under the action of the sealing block.

[0011] Preferably, a filtering assembly is installed on the detection head by threads. The filtering assembly includes an upper filter cylinder and a lower filter cylinder, and the upper filter cylinder and the lower filter cylinder are cooperatively connected through a snap structure.

[0012] Preferably, the snap structure includes a card slot and a card block. The card slot is in an L-shaped structure and is arranged outside the lower filter cylinder. The card slot includes a vertical slot and a horizontal slot. The card block is arranged inside the upper filter cylinder. When installing, the upper filter cylinder is adapted to be sleeved on the lower filter cylinder through the cooperation of the card block and the vertical slot, and then the upper filter cylinder is adapted to rotate, so that the card block is engaged with the horizontal slot to realize the locking of the upper filter cylinder.

[0013] Preferably, the top end of the upper filter cylinder has a plurality of filtering areas, and a baffle is installed at the top end of the lower filter cylinder. The baffle has a plurality of through slots that cooperate with the filtering areas. When the upper filter cylinder rotates along the horizontal slot to the first position, the filtering areas correspond to the through slots. When the upper filter cylinder rotates along the horizontal slot to the second position, the filtering areas are completely misaligned with the through slots and are in corresponding contact with the baffle, so that the detection head is hermetically isolated from the outside.

[0014] Preferably, a crank is provided on the front side of the leak detector, and the crank is electrically connected to the angle adjustment device; a cover is movably provided on the side of the leak detector, there is a bulge on the cover, and a depression is provided on the rear side of the leak detector; when the cover is closed on the front side of the leak detector, the bulge is engaged with the crank to lock the cover; when the cover is opened and attached to the rear side of the leak detector for storage, the bulge is engaged with the depression to lock the cover.

[0015] A working method of a leak detection instrument, based on the above leak detection instrument, includes a leak detection step, which is characterized in that: in this step, when detecting a leak in a pipeline deep in a corner, the length of the detection head is adjusted by a length adjustment device, and the angle of the detection head is adjusted by an angle adjustment device.

[0016] Compared with the prior art, the beneficial effects of the present application are as follows: By providing length and angle adjustment devices, the present invention can flexibly adjust the detection head during the leak detection of pipelines, thereby achieving accurate detection at different positions. Especially for the gas pipelines located in corners or deep inside the household kitchen, the difficulty of the detection work is greatly reduced, and the detection efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the length and angle adjustment devices of the present invention.

[0019] Figure 3 It is a schematic diagram of the length adjustment device of the present invention.

[0020] Figure 4 It is a schematic diagram of the structure of the angle adjustment device of the present invention.

[0021] Figure 5 It is a schematic diagram when the leak detector of the present invention performs an air suction detection.

[0022] Figure 6 It is a schematic diagram of the enlarged structure at A of the present invention.

[0023] Figure 7 It is a schematic diagram of the state when the sealing block opens the channel under the action of air flow in the present invention.

[0024] Figure 8 It is a schematic diagram when the telescopic device extends in sequence in the present invention.

[0025] Figure 9 It is a schematic diagram of the structure after the filter assembly is disassembled in the present invention.

[0026] Figure 10 This is a schematic diagram of the specific structure of the filtering component of the present invention.

[0027] Figure 11 This is a schematic diagram of the specific snap structure of the present invention.

[0028] Figure 12 This is a front and rear side schematic diagram of the leak detector when the cover of the present invention is opened.

[0029] Figure 13 This is a front and rear side schematic diagram of the leak detector when the cover of the present invention is closed.

[0030] Figure 14 This is a schematic diagram of the protection block structure of the present invention.

[0031] Figure 15 This is a schematic diagram of the specific structure of the protection block of the present invention.

[0032] In the figure: 1. Leak detector; 2. Universal pipe; 3. Length adjustment device; 301. Sleeve; 302. Sleeve rod; 4. Angle adjustment device; 401. Ball seat; 402. Ball head pin; 403. Telescopic device; 5. Detection head; 6. Filtering component; 601. Upper filter cylinder; 6011. Filtering area; 602. Lower filter cylinder; 7. Mounting plate; 8. Lighting lamp; 9. Camera; 10. Channel; 11. Sealing block; 12. Baffle; 1201. Through slot; 13. Snap structure; 1301. Card slot; 13011. Vertical slot; 13012. Horizontal slot; 1302. Card block; 14. Protrusion; 15. Crank; 16. Cover; 17. Snap ring; 18. Bulge; 19. Depression; 20. Protection block; 2001. Corner block; 21. Slot one; 22. Insert rod one; 23. Slot two; 24. Insert rod two. Specific embodiments

[0033] Next, in combination with specific embodiments, the present application will be further described. It should be noted that, on the premise of no conflict, the following described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0034] In the description of the present application, it should be noted that for orientation terms, if there are terms such as "center", "horizontal", "vertical", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation and position relationship is based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present application.

[0035] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and do not necessarily describe a specific order or sequence.

[0036] One preferred embodiment of this application is, for example, Figures 1 to 15 As shown, a leak detection instrument includes a leak detector 1 (i.e., a leak detection instrument), a universal tube 2, a length adjustment device 3, an angle adjustment device 4, and a detection head 5. The universal tube 2 is installed on the leak detector 1 through the first end, the length adjustment device 3 is installed on the second end of the universal tube 2, the angle adjustment device 4 is installed on the length adjustment device 3, and the detection head 5 is installed on the angle adjustment device 4.

[0037] It can be understood that during leak detection, the staff can first adjust the detection head 5 to an appropriate length and position through the universal tube 2, and then insert the detection head 5 into the pipeline to be detected to perform leak detection. Of course, during the actual detection process, some detection points may be located at corner positions or deeper, and at this time, the position of the detection head 5 can be adjusted through the two adjustment devices. Exemplarily: The length of the detection head 5 is adjusted through the length adjustment device 3 so that the detection head 5 extends to a position near the detection point of the pipeline where it is located. Subsequently, the angle of the detection head 5 is adjusted through the angle adjustment device 4 so that the detection head 5 can be accurately adjusted to the detection position, improving the convenience of detection.

[0038] In one embodiment of this application, for example, Figure 3 As shown, the length adjustment device 3 includes a plurality of sleeves 301, and the adjacent sleeves 301 are hermetically sleeved to form a multi-section telescopic structure; the uppermost sleeve 301 is connected to the angle adjustment device 4, and the lowermost sleeve 301 is installed on the second end of the universal tube 2 and is connected and cooperated with the gas source (such as a micro air pump with air extraction and discharge functions) in the leak detector 1 through a trachea. Specifically, during length adjustment, the gas source can pass compressed gas into the sleeve 301 to achieve the elongation of the sleeve 301; conversely, when the gas source extracts air, the shortening of the sleeve 301 can be achieved. Thus, the length of the detection head 5 is adjusted.

[0039] In this embodiment, for example, Figure 4As shown in the figure, the angle adjustment device 4 includes a ball seat 401, a ball head pin 402, and a plurality of telescopic devices 403. The ball seat 401 is installed on the uppermost sleeve 301. The spherical head of the ball head pin 402 is fitted with the ball seat 401. The detection head 5 is installed on the connecting rod of the ball head pin 402 through the mounting plate 7. The telescopic device 403 is ball-jointed to the top end of the ball seat 401, and the piston end of the telescopic device 403 is ball-jointed to the bottom end of the mounting plate 7. It can be understood that when adjusting the angle, the plurality of telescopic devices 403 can perform telescopic actions so that the detection head 5 can be rotationally adjusted under the action of the ball head pin 402.

[0040] It should be noted that the specific structure and working principle of the telescopic device 403 are well-known technologies to those skilled in the art, so they will not be elaborated in detail here. We know that since it is installed on the universal tube 2, the size of the telescopic device 403 is small. In this application, a micro cylinder is preferably used, and of course, a micro oil cylinder can also be used.

[0041] As a further description of the above embodiment: The number of the telescopic devices 403 is preferably four. As Figure 4 shown, the four telescopic devices 403 are arranged at equal distances. When adjusting, through the telescopic actions of different telescopic devices 403, the detection head 5 can be adjusted at any angle within a certain range, improving the accuracy and flexibility of the adjustment.

[0042] When the leak detector 1 is in use, the following problem may occur: If a micro-leak occurs near the detection point and the leaked gas does not diffuse to the detection point, a missed detection may occur.

[0043] Therefore, to solve the above technical problems, one embodiment of this application is that, as Figure 5 shown, a groove body can be provided inside the ball head pin 402 and the installed ball seat 401 to form a hollow structure. Then, the detection head 5 can be communicated with the gas source in sequence through the hollow ball head pin 402, ball seat 401, sleeve 301, and universal tube 2 (as Figure 5 shown by the arrow). It can be understood that during detection, the detection head 5 can draw air under the action of the gas source. In this way, even if the concentration of the leaked gas near the detection point is low, the detection head 5 can inhale the nearby gas through suction for detection, thereby improving the accuracy and reliability of the detection. In addition, this design also enables the detection instrument to more flexibly cope with various complex detection environments, improving the practicability and applicability of the instrument.

[0044] As Figure 4As shown, in order to further ensure the stability and safety of the detection instrument during use, some auxiliary devices can also be set on the leak detector 1. For example, a lighting lamp 8 can be set on the detection head 5 so that when detecting in a dim environment, it can provide sufficient lighting for the staff, improving the accuracy and efficiency of detection. At the same time, a camera 9 can also be set on the leak detector 1 so that the pictures during the detection process can be transmitted to the staff in real time to help them better observe and analyze the detection situation.

[0045] In addition, in order to further improve the convenience and practicality of the detection instrument, some other functional modules can also be set in its embodiments. For example, a display screen and a control system can be set on the leak detector 1 so that the staff can view the detection data and the picture status captured by the camera 9 in real time through the display screen, and operate and set the instrument through the control system. At the same time, a storage device and a communication module can also be set on the leak detector 1 so that the detection data can be uploaded to the cloud server or other terminal devices in real time to realize remote storage and sharing of the data.

[0046] Based on the above embodiments, when the sleeve 301 extracts gas, it will interfere with the telescopic movement of the sleeve 301. Therefore, in order to enable the sleeve 301 to still perform telescopic movement, as Figure 2 shown, the length adjustment device 3 further includes a plurality of sleeve rods 302 (corresponding to the number of sleeves 301). The sleeve rods 302 are connected to the corresponding sleeves 301, and adjacent sleeve rods 302 are hermetically sleeved. The lowermost sleeve rod 302 is connected to the gas source. That is, at this time, the gas source uses compressed gas to realize the telescopic movement adjustment of the sleeve rod 302, and then realizes the telescopic adjustment of the sleeve 301, and the sleeve 301 can also ensure the above-mentioned air extraction process.

[0047] Specifically, the number of sleeves 301 should be at least two, and at this time, the setting structure between the sleeve rods 302 is similar to that of a cylinder. When two are used, in order to ensure sufficient stroke during telescoping, the lowermost fixed sleeve rod 302 needs to have sufficient length, so that the sliding sleeve rod 302 can be extended and retracted and hidden, which will greatly reduce the flexibility of the front detection head 5. Therefore, the number of sleeves 301 (sleeve rods 302) can be more than three, thereby forming a multi-stage telescopic structure. That is, the more the number of sleeves 301, the shorter the length after contraction. In this application, three are used, so the following embodiments also take three as an example for illustration.

[0048] As Figure 3As shown in the figure, the three sleeve rods 302 (sleeve 301) are numbered, from bottom to top as Ⅰ, Ⅱ, and Ⅲ. The diameters of the sleeve rods 302 (sleeve 301) decrease successively from bottom to top. That is to say, the sleeve rods 302 (sleeve 301) become thinner from bottom to top. When extending, the air source passes gas into the bottommost (No. Ⅰ) sleeve rod 302. Under the action of air pressure, the topmost (No. Ⅲ) sleeve rod 302 will extend under the thrust of the gas. When the (No. Ⅲ) sleeve rod 302 extends to the limit position, the (No. Ⅲ) sleeve rod 302 will drive the (No. Ⅱ) sleeve rod 302 to extend, thereby realizing the sequential extension adjustment from top to bottom.

[0049] Based on the above embodiments, there may be such a problem after the extension adjustment: that is, during actual adjustment, it may only be necessary to extend one section each time, that is, there is no need for full extension adjustment. In this way, after each extension, the thinnest (No. Ⅲ) sleeve 301 supports the angle adjustment device 4 and the detection head 5. As we know, the smaller the size of the sleeve rod 302 (sleeve 301), the lower its strength. Therefore, damage and deformation may occur after long-term use.

[0050] Therefore, to solve the above technical problems, in one embodiment of the present application, as Figure 6 shown, a channel 10 is provided at the bottom end of the sleeve rod 302. A sealing block 11 can be elastically and slidably installed in the channel 10. It can be understood that, as Figure 8 shown in (c) of the figure, assume that the multiple sleeve rods 302 (sleeve 301) are in a contracted state in the initial state. When performing the extension adjustment, gas is passed into the (No. Ⅰ) sleeve rod 302. At this time, the channel 10 at the bottom end of the (No. Ⅱ) sleeve rod 302 is in a sealed state under the action of the sealing block 11. Therefore, the gas will push the (No. Ⅱ) sleeve rod 302 and the (No. Ⅰ) sleeve rod 302 to extend synchronously, as Figure 8 shown in (d) of the figure. When the (No. Ⅱ) sleeve rod 302 moves to the limit position along the (No. Ⅰ) sleeve rod 302, at this time, the sealing block 11 will be pushed up under the action of air pressure, thereby opening the channel 10, as Figure 7 shown in (a) of the figure, and then allowing the air flow to enter the interior of the (No. Ⅱ) sleeve rod 302 and pushing the (No. Ⅲ) sleeve rod 302 to extend, as Figure 8 shown in (e) of the figure. That is to say, when performing the length adjustment, the multiple sleeves 301 extend successively from bottom to top under the action of the sealing block 11. In this way, if only one section is extended during adjustment, at this time, it is equivalent to the (No. Ⅱ) and (No. Ⅲ) sleeve rods 302 jointly supporting the detection head 5, thereby improving its support strength, avoiding damage and deformation after long-term use, and improving the stability and reliability of the instrument use.

[0051] It should be noted that when the micro air pump stops working, the state of the sealing block 11 under the action of elastic force is asFigure 6 As shown, the channel 10 is thus in a closed state, that is, the sleeve 301 can maintain the adjusted state. When performing the contraction adjustment, as Figure 7 shown, the sealing block 11 will also open the channel 10 under the action of suction, thus not interfering with the contraction.

[0052] In one embodiment of the present application, as Figure 4 shown, a filtering component 6 can be installed on the detection head 5. In this way, when performing the suction detection, the filtering component 6 can filter the impurities in the pipeline or the air, thus preventing the impact on the inside of the detector.

[0053] Specifically, as Figure 9 shown, for the convenience of installing the filtering component 6, the filtering component 6 can be installed in a threaded fit with the detection head 5, thus improving the convenience of disassembly and assembly. As Figure 10 shown, the filtering component 6 includes an upper filter cylinder 601 and a lower filter cylinder 602. Among them, the upper filter cylinder 601 can perform coarse filtering, that is, filter larger impurities; while the lower filter cylinder 602 can perform fine filtering, that is, filter smaller impurities, so as to improve the filtering effect. In addition, the upper filter cylinder 601 and the lower filter cylinder 602 can also be set to be detachable, for example, in a threaded fit or connected through a snap structure 13, so as to facilitate subsequent cleaning and replacement and ensure the continuous use effect of the filtering component 6.

[0054] As a further description of the above embodiment: as Figure 10 and Figure 11 shown, the snap structure 13 includes a slot 1301 and a snap block 1302. The slot 1301 is in an L-shaped structure and is arranged outside the lower filter cylinder 602. The slot 1301 includes a vertical slot 13011 and a horizontal slot 13012. The snap block 1302 is arranged inside the upper filter cylinder 601. It can be understood that during installation, the upper filter cylinder 601 is sleeved outside the lower filter cylinder 602. Of course, at this time, the snap block 1302 will be inserted into the vertical slot 13011, and then the upper filter cylinder 601 is rotated, so that the snap block 1302 rotates accordingly and cooperates with the horizontal slot 13012, so as to axially limit the upper filter cylinder 601 and thus lock and install it. Similarly, conversely, during disassembly and cleaning, only need to reverse the upper filter cylinder 601 so that the snap block 1302 corresponds to the vertical slot 13011, then the limit on the upper filter cylinder 601 can be released, and then the upper filter cylinder 601 can be pulled out, which is simple and convenient.

[0055] Furthermore, as Figure 10As shown in the figure, the top end of the upper filter cartridge 601 has a plurality of filter areas 6011. Above the top end of the lower filter cartridge 602, a baffle 12 is installed. The baffle 12 has a plurality of through grooves 1201 that cooperate with the filter areas 6011. Specifically, during installation, when the upper filter cartridge 601 rotates along the horizontal groove 13012 to the first position, the filter areas 6011 correspond to the through grooves 1201, that is, the entire filter assembly 6 is in a conductive state at this time. When the upper filter cartridge 601 rotates along the horizontal groove 13012 to the second position, the filter areas 6011 are completely misaligned with the through grooves 1201 and abut against the baffle 12 correspondingly. That is, at this time, the baffle 12 blocks the filter areas 6011, thereby isolating the detection head 5 from the outside airtight. In this way, when the detector is not used for a long time, moisture can be prevented from entering its interior, thereby extending the service life.

[0056] As a further description of the above embodiment: As Figure 11 shown, we set an A groove and a B groove on the horizontal groove 13012 respectively. The A groove is the first position, and the B groove is the second position. An elastic convex block 14 is provided on the clamping block 1302. That is to say, when the convex block 14 cooperates with the A groove, the upper filter cartridge 601 is installed and the entire filter assembly 6 is in a conductive state at this time. When the convex block 14 cooperates with the B groove, the upper filter cartridge 601 is installed and the entire filter assembly 6 is in a closed state at this time.

[0057] In one embodiment of the present application, as Figure 1 and Figure 12 shown, a crank 15 can be provided on the front side (operation side) of the leak detector 1. The crank 15 and the angle adjustment device 4 are electrically connected. That is to say, by rotating the crank 15, the angle adjustment device 4 can be driven to adjust its angle, so that the detection head 5 can be more accurately adjusted to the required detection position. This design not only improves the operation convenience, but also enhances the flexibility and practicability of the instrument. When the staff is performing detection, they only need to simply operate the crank 15 to easily complete the angle adjustment of the detection head 5, greatly improving the work efficiency. In addition, the setting of the crank 15 also makes the operation of the instrument in a complex environment simpler and more intuitive, reducing the operation difficulty and improving the user experience.

[0058] As Figure 12 and Figure 13As shown, a cover 16 can be movably arranged on the side of the leak detector 1. There is a protrusion 18 on the cover 16, and a recess 19 is arranged at the rear side of the leak detector 1. It can be understood that when the cover 16 is closed on the front side of the leak detector 1, the protrusion 18 is engaged with the crank 15 to lock the cover 16. When the cover 16 is opened and attached and stored on the rear side of the leak detector 1, the protrusion 18 is engaged with the recess 19 to lock the cover 16. This design not only keeps the leak detector 1 clean when not in use, but also facilitates the storage of the cover 16 when not in use, further improving the portability and practicality of the instrument.

[0059] Specifically, as Figure 12 shown, the movable installation method between the cover 16 and the side of the leak detector 1 is: a connecting plate is hinged on the side of the leak detector 1, and the cover 16 is hinged at one end of the connecting plate. Therefore, the cover 16 can be rotated and closed against the front side of the leak detector 1, and it can also be rotated and closed against the rear side of the leak detector 1. It should be known that due to the presence of the crank 15, a protrusion 18 that cooperates with the crank 15 must be provided on the cover 16 to protect the crank 15 when closing; of course, a recess 19 that cooperates with the protrusion 18 must also be provided at the rear side of the leak detector 1. And through these settings, the limit of the cover 16 when closing can be realized, that is, there is no need to additionally set a limit component, reducing the production cost.

[0060] Furthermore, in order to make the leak detector 1 more in line with the "three-proof" standard, that is, waterproof, dustproof and shockproof. For waterproof, only the components such as the housing, buttons, and display screen of the leak detector 1 need to be sealed during installation. Dustproof can be achieved through the setting of the filtering component 6, and shockproof as Figure 13 and Figure 14 shown, protective blocks 20 can be arranged at the four corners of the leak detector 1. The material can be rubber. It can play a buffering role when the leak detector 1 accidentally drops, reducing the impact on the instrument. Moreover, its wear-resistant and corrosion-resistant characteristics can also extend the service life of the protective blocks 20, thus better protecting the leak detector 1.

[0061] Specifically, as Figure 14 and Figure 15As shown in the figure, the protection block 20 includes a pair of corner blocks 2001. On both sides of the corners of the leak detector 1, there are respectively slot one 21, and on one side of one of the corner blocks 2001, there is a slot two 23; on the inner sides of the two corner blocks 2001, there is a plug rod one 22, and on the other side of the other corner block 2001, there is a plug rod two 24. When installing, we take the installation of one of the protection blocks 20 as an example to illustrate: Align the plug rod one 22 of the corner block 2001 with the slot one 21 on the leak detector 1 and insert it, so that the two corner blocks 2001 are correspondingly installed. At the same time, the slot two 23 and the plug rod two 24 on the two corner blocks 2001 are also correspondingly plugged, thus realizing the double-limiting installation of the corner block 2001. On the one hand, this improves the convenience during installation, and on the other hand, it improves the stability after installation.

[0062] As Figure 12 and Figure 13 shown in the figure, a snap ring 17 can also be rotatably installed at the rear of the leak detector 1. During use, the snap ring 17 can be rotated out, and then one finger can be inserted into the snap ring 17. In this way, when holding the leak detector 1, it can play a role in preventing detachment, that is, it can prevent the leak detector 1 from accidentally slipping off the hand.

[0063] On the other hand, the present application also provides a working method for a leak detection instrument, including a leak detection step. In this step, when detecting the leakage of the pipeline in the deep corner, the length of the detection head 5 is adjusted through the length adjustment device 3, and the angle of the detection head 5 is adjusted through the angle adjustment device 4, so as to realize the precise detection of the detection point.

[0064] Finally, it should be noted that the leak detector 1 of the present application can not only be applied to the detection of pipelines in households, but also to the detection of pipelines in, for example, gas stations. As we know, the pipelines in the station are intricate and it is not convenient to conduct detections. When using the leak detector 1 of the present application, for example, when detecting air leakage at the flange connection in a deep pipeline, a general detector can only reach the front side of the flange connection for detection, and it is very inconvenient to detect the rear side. After using this instrument, the front end of the universal pipe 2 can be bent downward at this time so that the detection head 5 faces downward, and its overall shape is an "L" - shaped structure. Then the detection head 5 is extended to the upper position behind the flange connection, and then the detection head 5 is extended to the position behind the flange connection through the length adjustment device 3. Finally, through the mutual cooperation of the angle adjustment device 4, the lighting lamp 8 and the camera 9, the detection head 5 is rotated to the position to be measured. The telescopic device 403, the telescoping of the sleeve 301 and the air extraction detection actions in the present application all require the use of a micro - air pump. These three actions can be carried out independently and share one micro - air pump. Of course, multiple micro - air pumps can also be used for independent drive, that is, they are connected to the corresponding components through air pipelines and valves and are controlled by a controller. The control circuit of the controller and the pipeline connection belong to the common knowledge in the art, so they will not be elaborated here.

[0065] The above describes the basic principle, main features and advantages of the present application. Those skilled in the art of this industry should understand that the present application is not limited by the above - mentioned embodiments. What is described in the above - mentioned embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. A gas leakage detection instrument, characterized in that: include: Leak detector; A universal tube, the universal tube being mounted on the leak detector through a first end; A length adjustment device, the length adjustment device is installed at the second end of the universal tube; An angle adjustment device, the angle adjustment device is installed on the length adjustment device; as well as The detection head is installed on the angle adjustment device; when performing air leakage detection, the detection head adjusts the length and angle under the action of the length adjustment device and the angle adjustment device, thereby detecting different detection points.

2. The air leakage detection instrument according to claim 1, characterized in that: The length adjustment device includes a plurality of sleeves, and adjacent sleeves are sealed and sleeved to form a multi-section telescopic structure; the top sleeve is connected to the angle adjustment device, and the bottom sleeve is installed on the second end of the universal tube and connected to the gas source in the leak detector; when adjusting the length, the gas source is suitable for realizing the telescopic movement adjustment of the sleeve through compressed gas.

3. The air leakage detection instrument according to claim 2, characterized in that: The angle adjustment device includes a ball seat, a ball pin and multiple telescopic devices, the ball seat is installed on the topmost sleeve, the spherical head of the ball pin cooperates with the ball seat, and the detection head is installed on the connecting rod of the ball pin through a mounting plate; the telescopic device is ball-jointed at the top end of the ball seat, and the piston end of the telescopic device is ball-jointed at the bottom end of the mounting plate; when performing angle adjustment, the multiple telescopic devices are suitable for performing telescopic actions, so that the detection head can be rotated and adjusted under the action of the ball pin.

4. The air leakage detection instrument according to claim 3, characterized in that: The detection head is suitable for being connected with the gas source through the ball pin, the sleeve and the universal tube of the hollow structure in sequence; when performing detection, the detection head is suitable for performing air extraction detection under the action of the gas source; The length adjustment device also includes a plurality of sleeve rods, the sleeve rods are connected to the corresponding sleeves, adjacent sleeve rods are sealed and sleeved, the lowest sleeve rod is connected to the gas source, and the gas source is suitable for realizing telescopic movement adjustment of the sleeve rods through compressed gas.

5. The air leakage detection instrument according to claim 4, characterized in that: The number of the sleeves is at least three, and the diameters of the sleeves decrease from bottom to top; a channel is provided at the bottom end of the sleeve rod, and a sealing block is elastically slidably provided in the channel; when adjusting the length, the sleeves are suitable for extending out from bottom to top in sequence under the action of the sealing block.

6. The air leakage detection instrument according to any one of claims 1 to 5, characterized in that: A filter assembly is installed on the detection head through threads, and the filter assembly includes an upper filter cartridge and a lower filter cartridge. The upper filter cartridge and the lower filter cartridge are matched and connected with each other through a snap-fit ​​structure.

7. The air leakage detection instrument according to claim 6, characterized in that: The snap-fit ​​structure includes a slot and a block, the slot is L-shaped and is arranged on the outside of the lower filter cartridge, the slot includes a vertical slot and a horizontal slot, and the block is arranged on the inner side of the upper filter cartridge; during installation, the upper filter cartridge is suitable for being sleeved on the lower filter cartridge through the cooperation of the block and the vertical slot, and then the upper filter cartridge is suitable for rotating, so that the block cooperates with the horizontal slot to achieve locking of the upper filter cartridge.

8. The air leakage detection instrument according to claim 7, characterized in that: The top of the upper filter cartridge has a plurality of filter areas, and a baffle is installed above the top of the lower filter cartridge, wherein the baffle has a plurality of through slots matching the filter areas; When the upper filter cartridge rotates to a first position along the horizontal groove, the filter area corresponds to the through groove; when the upper filter cartridge rotates to a second position along the horizontal groove, the filter area is completely misaligned with the through groove and corresponds to the baffle, thereby isolating the detection head from the outside seal.

9. The air leakage detection instrument according to claim 8, characterized in that: A crank is provided on the front side of the leak detector, and the crank is electrically connected to the angle adjustment device; a cover is movably provided on the side of the leak detector, the cover has a bulge, and a recess is provided on the rear side of the leak detector; when the cover is closed on the front side of the leak detector, the bulge is snap-fitted with the crank to lock the cover; when the cover is opened and attached to the rear side of the leak detector, the bulge is snap-fitted with the recess to lock the cover.

10. A working method of a gas leakage detection instrument, based on the gas leakage detection instrument according to any one of claims 1 to 9, comprising a gas leakage detection step, characterized in that: In this step, when leak detection is performed on a pipeline deep in a corner, the length of the detection head is adjusted by the length adjustment device, and the angle of the detection head is adjusted by the angle adjustment device.

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