A glue leakage instrument capillary tube mouth glue body contact detection device

Abstract

The application discloses a glue leakage instrument capillary port colloid contact detection device, which is applied to the technical field of glue leakage detection of injection molding machines. The instrument carrier is arranged, and the internal structure for normally performing detection is provided. The power supply interface is arranged to facilitate power supply of the device. The air pipe interface is arranged to be connected with a detection air pipe. The flange or nozzle of the injection molding machine is detected through the air pump and the pressure sensor and other structures in the instrument carrier. The coiled assembly is arranged to coil the excess detection air pipe through the carrier disc part and the matched front cover. The detection end assembly is arranged to replace the position where the detection air pipe contacts the high-temperature material, so as to prevent the deformation of the detection air pipe. The detection contact part is arranged to be directly mounted with the detection position. The connecting part is arranged to facilitate the connection between the air pipe and the detection contact part. Since the detection end assembly made of metal replaces the connection between the detection air pipe and the high-temperature detection position, the deformation of the detection air pipe and other conditions do not occur.

Description

Technical Field

[0001] This invention belongs to the field of injection molding machine leakage detection technology, and specifically relates to a leakage meter capillary orifice colloid contact detection device. Background Technology

[0002] Based on the production and processing procedures and equipment used in injection molding, various situations may arise during production, but not limited to the one mentioned below. More specifically, in order to detect whether there is any leakage at the injection point of the equipment during the injection molding process, it is necessary to use the capillary colloid detection method of the leakage meter to detect the injection point.

[0003] The instrument's detection method involves adding an air pump inside the instrument and continuously installing capillary tubes at the flange or nozzle. If glue leakage occurs, the glue will block the capillary tube when the air pump periodically blows air, causing the internal pressure of the capillary tube to rise. This is used to determine whether glue leakage has occurred and to trigger an alarm. However, in the existing technology, because the working environment temperature is high during injection molding, prolonged high-temperature operation may cause the air tube to deform or melt, causing them to stick together and block the exhaust position, resulting in false alarms. Moreover, if the capillary tube is too long, it may wrap around the outside of the equipment, affecting the normal use of the equipment.

[0004] Based on the two issues mentioned above, we found that existing injection molding leakage detectors have difficulty avoiding these problems simultaneously. Therefore, we propose a leakage detector capillary port colloid contact detection device that allows unused tubing to be wound up and avoids deformation of the tubing due to prolonged contact with high temperatures. Summary of the Invention

[0005] The purpose of this invention is to address the existing capillary colloid contact detection device for a leak tester. Its advantage is that it allows unused tubing to be wound up and avoids deformation of the tubing due to prolonged contact with high temperatures.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a capillary port colloid contact detection device for a leaking adhesive meter, comprising an instrument carrier, a power interface and an air tube interface are bolted to the bottom of the instrument carrier, a detection air tube is snapped into the inner side of the air tube interface, a coiling assembly is provided on the outer side of the detection air tube, and a detection end assembly is bolted to the side of the detection air tube away from the instrument carrier.

[0007] The detection end assembly includes a detection contact portion, and a connecting portion is bolted to the side of the detection contact portion near the detection air tube. The connecting portion is snapped into the detection air tube on the side near the detection air tube.

[0008] By adopting the above technical solution, an instrument carrier is provided with an internal structure for normal testing. A power interface is provided for powering the device. An air tube interface is provided for connecting to the detection air tube. The detection air tube is used to connect to the air pump and pressure sensor inside the instrument carrier and is installed at the flange or nozzle of the injection molding machine for testing. A coiling assembly is provided for coiling excess detection air tube. A detection end assembly is provided to replace the position where the detection air tube contacts high-temperature materials to prevent deformation of the detection air tube. A detection contact part is used for direct installation at the detection position. A connection part is provided to facilitate the connection between the air tube and the detection contact part.

[0009] The present invention is further configured such that: the coil assembly includes a carrier disc portion, a front cover is provided on the front side of the carrier disc portion, and a mating lug is bolted to both sides of the carrier disc portion and both sides of the mating front cover, and a mounting screw is provided on the inner side of the mating lug.

[0010] By adopting the above technical solution, a carrier plate is set to accommodate the detection tube, a matching front cover is set to limit the detection tube to prevent it from loosening, and a matching ear plate is set to cooperate with the mounting screw to facilitate the connection between the matching front cover and the carrier plate.

[0011] The present invention is further configured such that: the carrier disk includes a receiving disk, a sub-frame is bolted to the rear side of the receiving disk, a hollow step block is provided on the front side of the sub-frame, the outer side of the hollow step block is rotatably connected to the carrier disk, a winding disk is bolted to the front side of the outer side of the hollow step block, a separator is bolted to the front side of the winding disk, and the outer side of the separator is in contact with the detection air tube.

[0012] By adopting the above technical solution, a receiving tray is set up to hold the detection tube. The set subframe, together with the hollow step block, can make the hollow step block rotate inside the receiving tray. When it rotates, it will drive the winding tray and the dividing column to rotate, so as to wind or loosen the detection tube.

[0013] The present invention is further configured such that: a fixed shaft is bolted to the front side of the sub-frame, the outer side of the front side of the fixed shaft is rotatably connected to the inner side of the hollow step block, a return spring is bolted to the outer side of the fixed shaft, and the outer side of the return spring is bolted to the hollow step block.

[0014] By adopting the above technical solution, and by setting a fixed shaft in conjunction with a reset spring, it is possible to ensure that after the part of the detection tube that has been wound out is pulled out, the reset spring will continue to store force because the winding disc connected to the separator column is driven to rotate by the detection tube, thus preventing the part of the detection tube that has not been pulled out from coming off naturally.

[0015] The present invention is further configured such that: the front cover includes an end cover, a compression spring is bolted to the rear side of the end cover, a compression plate is bolted to the rear side of the compression spring, and the compression plate is disposed inside the receiving tray.

[0016] By adopting the above technical solution, by setting an end cap in conjunction with a pressure spring, the pressure plate will limit the detection air tube behind it during the installation of the pressure plate, so as to prevent it from becoming loose inside the receiving plate, causing it to become entangled or unable to be pulled out normally.

[0017] The present invention is further configured such that: both the end cap and the pressure plate have through holes on their inner sides, the inner side of the through holes is used in conjunction with the partition column, a limiting telescopic rod is bolted to the rear side of the end cap, and the rear side of the limiting telescopic rod is bolted to the pressure plate.

[0018] By adopting the above technical solution, the through-hole is set to facilitate the insertion of the partition column into the pressure plate, avoiding mutual pressure between the structures that would prevent them from functioning properly. The limit telescopic rod can facilitate the limitation of the movement position of the pressure plate relative to the end cover.

[0019] The present invention is further configured such that: the connecting part includes a sleeve frame, the inner side of the sleeve frame is sleeved with the detection air tube, the outer side of the sleeve frame is provided with an external thread, an elastic sheet is bolted to the side of the sleeve frame near the detection air tube, and a fastening sleeve is threaded to the outer side of the sleeve frame through the external thread.

[0020] By adopting the above technical solution, after the sleeve frame and the detection air tube are connected, the fastening sleeve is screwed on the outside of the sleeve frame through the external thread. When the fastening sleeve is continuously screwed in, the elastic sheet will deform due to its shape and press against the outside of the detection air tube to prevent loosening.

[0021] The present invention is further configured such that: a mating groove is provided on the inner side of the sleeve frame, a sealing sleeve is provided on the inner side of the mating groove, and the inner side of the mating groove is sleeved with the detection air tube.

[0022] By adopting the above technical solution, the matching groove can be set to facilitate the connection between the sleeve frame and the detection air tube, and the sealing sleeve can improve the sealing between the detection air tube and the sleeve frame.

[0023] The present invention is further configured such that: the detection contact part includes a hollow metal tube, a positioning ring is welded to the outer side of the hollow metal tube, a ventilation groove is provided on the side of the hollow metal tube away from the detection air tube, a sliding metal tube is slidably connected to the outer side of the hollow metal tube, a force-applying spring is bolted to the inner side of the sliding metal tube, and the side of the force-applying spring near the positioning ring is bolted to the positioning ring.

[0024] By adopting the above technical solution, the movement position of the sliding metal tube can be easily limited by setting a hollow metal tube in conjunction with a positioning ring. The venting groove facilitates the passage of gas. The sliding metal tube is used to cover the outside of the hollow metal tube. In the event of glue leakage, the leaked glue covers the venting groove, thus increasing the internal pressure and triggering an alarm. During repair, the sliding metal tube can be moved outside the hollow metal tube, exposing the venting groove portion of the hollow metal tube to the outside of the sliding metal tube, making it easier to clean the leaked glue. Compared with existing technologies, it is also more convenient to clean up the leaked glue.

[0025] The invention is further configured such that: the side of the hollow metal tube near the detection air tube is welded to the sleeve frame, an elastic card is bolted to the outside of the hollow metal tube, and a retaining ring is bolted to the surface of the sliding metal tube, and the elastic card is engaged with the retaining ring.

[0026] By adopting the above technical solution, and by setting up an elastic card and a retaining ring to cooperate, when the sliding metal tube needs to be slid to deal with the leakage of glue on the outside of the hollow metal tube, the elastic card is locked outside the retaining ring, which can prevent the sliding metal tube from being reset due to the elasticity of the force spring when there is no external force.

[0027] In summary, the present invention has the following beneficial effects:

[0028] The instrument carrier provides a suitable internal structure for normal testing. A power interface facilitates powering the device, and an air tube interface connects to the testing air tube. The instrument carrier's internal air pump and pressure sensor detect the flanges or nozzles of the injection molding machine. A coiling assembly, using the carrier's coil and matching front cover, coils excess testing air tube. A testing end assembly replaces the testing air tube in contact with high-temperature materials, preventing deformation. A testing contact part allows direct installation at the testing location. A connecting part facilitates connection between the air tube and the testing contact part. Because the metal testing end assembly replaces the testing air tube for connection to the high-temperature testing location, deformation of the testing air tube is avoided. The coiling assembly prevents the testing air tube from becoming entangled on the outside of the device due to excessive length. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the coil assembly structure of the present invention;

[0031] Figure 3 This is a schematic diagram of the end cap structure of the present invention;

[0032] Figure 4 This is a schematic diagram of the front cover structure of the present invention;

[0033] Figure 5 This is a schematic diagram of the receiving tray structure of the present invention;

[0034] Figure 6 This is a schematic diagram of the detection of tracheal entanglement according to the present invention;

[0035] Figure 7 This is a schematic diagram of the connecting part structure of the present invention;

[0036] Figure 8 This is a schematic diagram of the fastening sleeve structure of the present invention;

[0037] Figure 9 This is a schematic diagram of the hollow metal tube structure of the present invention;

[0038] Figure 10 This is a schematic diagram of the structure of the detection contact part of the present invention;

[0039] Figure 11 This is the present invention. Figure 5 A magnified view of a portion of point A in the middle.

[0040] Reference numerals: 1. Instrument carrier; 2. Power interface; 3. Tracheal interface; 4. Detection tracheal tube; 5. Coil assembly; 501. Carrier tray; 5011. Subframe; 5012. Hollow stepped block; 5013. Winding tray; 5014. Divider column; 5015. Receiving tray; 502. Front cover; 5021. End cover; 5022. Compression spring; 5023. Compression plate; 503. Ear plate; 504. Mounting screw; 6. Detection end assembly; 60 1. Detection contact part; 6011. Hollow metal tube; 6012. Positioning ring; 6013. Vent groove; 6014. Sliding metal tube; 6015. Force spring; 602. Connecting part; 6021. Sleeve bracket; 6022. External thread; 6023. Elastic plate; 6024. Fastening sleeve; 7. Fixed shaft; 8. Return spring; 9. Through hole; 10. Mating groove; 11. Sealing sleeve; 12. Elastic clip; 13. Snap ring; 14. Limiting telescopic rod. Detailed Implementation

[0041] The present invention will be further described in detail below with reference to the accompanying drawings.

[0042] Example 1:

[0043] refer to Figure 1-11A capillary colloid contact detection device for a glue leakage tester includes an instrument carrier 1. A power interface 2 and an air pipe interface 3 are bolted to the bottom of the instrument carrier 1. A detection air pipe 4 is snapped into the inner side of the air pipe interface 3, and a coiling assembly 5 is provided on the outer side of the detection air pipe 4. The instrument carrier 1 provides the internal structure for normal detection. The power interface 2 facilitates powering the device. The air pipe interface 3 connects to the detection air pipe 4. The detection air pipe 4 connects to the air pump and pressure sensor inside the instrument carrier 1 and is used for detection at the flange or nozzle of an injection molding machine. The coiling assembly 5 coils up any excess detection air pipe 4.

[0044] like Figure 2 As shown, the coil assembly 5 includes a carrier disc portion 501. A front cover 502 is provided on the front side of the carrier disc portion 501. Both sides of the carrier disc portion 501 and both sides of the front cover 502 are bolted with mating ear plates 503. An installation screw 504 is provided on the inner side of the mating ear plate 503. The carrier disc portion 501 is used to accommodate the detection air tube 4, and the front cover 502 is used to limit the detection air tube 4 to prevent it from loosening. The mating ear plate 503 and the installation screw 504 can facilitate the connection between the front cover 502 and the carrier disc portion 501.

[0045] like Figure 11 As shown, the carrier disk 501 includes a receiving disk 5015. A sub-frame 5011 is bolted to the rear side of the receiving disk 5015. A hollow step block 5012 is provided on the front side of the sub-frame 5011. The outer side of the hollow step block 5012 is rotatably connected to the carrier disk 501. A winding disk 5013 is bolted to the front side of the outer side of the hollow step block 5012. A separator post 5014 is bolted to the front side of the winding disk 5013. The outer side of the separator post 5014 contacts the detection air tube 4. The receiving disk 5015 is used to receive the detection air tube 4. The sub-frame 5011, in conjunction with the hollow step block 5012, allows the hollow step block 5012 to rotate inside the receiving disk 5015. When it rotates, it will drive the winding disk 5013 and the separator post 5014 to rotate, so as to wind or unwind the detection air tube 4.

[0046] like Figure 11 As shown, a fixed shaft 7 is bolted to the front side of the subframe 5011. The outer side of the front of the fixed shaft 7 is rotatably connected to the inner side of the hollow step block 5012. A reset spring 8 is bolted to the outer side of the fixed shaft 7. The outer side of the reset spring 8 is bolted to the hollow step block 5012. By setting the fixed shaft 7 in conjunction with the reset spring 8, it is convenient that after the part of the detection air tube 4 that has been wound is pulled out, the reset spring 8 will continue to store force because the winding disc 5013 connected to the separator column 5014 is driven to rotate by the detection air tube 4, thus preventing the part of the detection air tube 4 that has not been pulled out from coming off naturally.

[0047] like Figure 4 As shown, the front cover 502 includes an end cover 5021. A pressure spring 5022 is bolted to the rear side of the end cover 5021, and a pressure plate 5023 is bolted to the rear side of the pressure spring 5022. The pressure plate 5023 is located inside the receiving tray 5015. By setting the end cover 5021 in conjunction with the pressure spring 5022, the pressure plate 5023 will limit the detection air tube 4 behind it while it is being installed, so as to prevent it from becoming loose inside the receiving tray 5015, causing it to become entangled or unable to be pulled out normally.

[0048] like Figure 4 As shown, both the end cap 5021 and the pressure plate 5023 have through holes 9 on their inner sides. The inner side of the through hole 9 is used in conjunction with the partition column 5014. The rear side of the end cap 5021 is bolted with a limiting telescopic rod 14. The rear side of the limiting telescopic rod 14 is bolted with the pressure plate 5023. By setting the through hole 9, it is easy to insert the partition column 5014 into the pressure plate 5023, so as to avoid the structure pressing against each other and thus failing to function properly. The limiting telescopic rod 14 can easily limit the movement position of the pressure plate 5023 relative to the end cap 5021.

[0049] Brief description of the usage process: When using, first coil the detection air tube 4 inside the receiving tray 5015, and extend it from the top and bottom openings of the receiving tray 5015. Then connect the top of the detection air tube 4 to the air tube interface 3. Cover the front cover 502 on the front side of the carrier tray 501. When connecting, put the pressure plate 5023 inside the receiving tray 5015. When the pressure plate 5023 contacts the detection air tube 4, the pressure spring 5022 is compressed. Then connect through the ear plate and the mounting screw 504. When using, connect the bottom of the detection air tube 4 to the detection position. When the detection air tube 4 is pulled out, the winding tray 5013 will rotate through the separator 5014.

[0050] Example 2:

[0051] refer to Figure 1-10 A capillary contact detection device for a glue leakage tester includes an instrument carrier 1. A detection end assembly 6 is bolted to the side of a detection air tube 4 away from the instrument carrier 1. The detection end assembly 6 includes a detection contact part 601. A connecting part 602 is bolted to the side of the detection contact part 601 near the detection air tube 4. The connecting part 602 is snapped into the detection air tube 4 on the side near the detection air tube 4. The detection end assembly 6 is used to replace the position where the detection air tube 4 contacts a high-temperature material to prevent deformation of the detection air tube 4. The detection contact part 601 is used for direct installation at the detection position. The connecting part 602 facilitates the connection between the air tube and the detection contact part 601.

[0052] like Figure 7As shown, the connecting part 602 includes a sleeve frame 6021. The inner side of the sleeve frame 6021 is sleeved with the detection air tube 4. The outer side of the sleeve frame 6021 is provided with an external thread 6022. An elastic piece 6023 is bolted to the side of the sleeve frame 6021 near the detection air tube 4. A fastening sleeve 6024 is threaded to the outer side of the sleeve frame 6021 through the external thread 6022. By setting the sleeve frame 6021 and the external thread 6022 to cooperate, after the sleeve frame 6021 and the detection air tube 4 are connected, the fastening sleeve 6024 is screwed onto the outer side of the sleeve frame 6021 through the external thread 6022. When the fastening sleeve 6024 is continuously screwed in, the elastic piece 6023 will deform due to its shape and press against the outer side of the detection air tube 4 to prevent loosening.

[0053] like Figure 7 As shown, the inner side of the sleeve frame 6021 is provided with a mating groove 10, and the inner side of the mating groove 10 is provided with a sealing sleeve 11. The inner side of the mating groove 10 is sleeved with the detection air tube 4. By providing the mating groove 10, it is easy to connect the sleeve frame 6021 and the detection air tube 4. The sealing sleeve 11 can improve the sealing between the detection air tube 4 and the sleeve frame 6021.

[0054] like Figure 10 As shown, the detection contact part 601 includes a hollow metal tube 6011. A positioning ring 6012 is welded to the outer side of the hollow metal tube 6011. A ventilation groove 6013 is provided on the side of the hollow metal tube 6011 away from the detection air pipe 4. A sliding metal tube 6014 is slidably connected to the outer side of the hollow metal tube 6011. A force-applying spring 6015 is bolted to the inner side of the sliding metal tube 6014. The side of the force-applying spring 6015 near the positioning ring 6012 is bolted to the positioning ring 6012. By setting the hollow metal tube 6011 in conjunction with the positioning ring 6012, the movement of the sliding metal tube 6014 can be facilitated. The movable position is limited, and the venting groove 6013 facilitates the passage of gas. The sliding metal tube 6014 is used to cover the outside of the hollow metal tube 6011. In the event of glue leakage, the leaked glue covers the venting groove 6013, thus increasing the internal pressure and triggering an alarm. During repair, the sliding metal tube 6014 can be moved outside the hollow metal tube 6011, exposing part of the venting groove 6013 of the hollow metal tube 6011 outside the sliding metal tube 6014, which facilitates the cleaning of the leaked glue. Compared with the existing technology, it is also more convenient to clean up the leaked glue.

[0055] like Figure 9As shown, the hollow metal tube 6011 is welded to the sleeve frame 6021 on the side near the detection air tube 4. An elastic card 12 is bolted to the outside of the hollow metal tube 6011, and a retaining ring 13 is bolted to the surface of the sliding metal tube 6014. The elastic card 12 and the retaining ring 13 are engaged. By setting the elastic card 12 and the retaining ring 13 to cooperate, when the sliding metal tube 6014 needs to be slid to deal with the external glue leakage of the hollow metal tube 6011, the elastic card 12 is locked outside the retaining ring 13, which can prevent the sliding metal tube 6014 from being elastically reset by the force spring 6015 when there is no external force.

[0056] Brief description of the usage process: Before use, first put the fastening sleeve 6024 on the outside of the detection air tube 4. Then, put the sleeve holder 6021 on the outside of the detection air tube 4 through the mating groove 10 and the sealing sleeve 11. Rotate the fastening sleeve 6024. When the fastening sleeve 6024 is continuously screwed in, the elastic piece 6023 will deform due to its shape and press against the outside of the detection air tube 4. When glue leakage occurs at the detection position, the glue will cover the position of the ventilation groove 6013, and the instrument carrier 1 will alarm. During repair, the sliding metal tube 6014 can be moved on the outside of the hollow metal tube 6011, so that the ventilation groove 6013 of the hollow metal tube 6011 is exposed outside the sliding metal tube 6014, so as to clean the glue leakage.

[0057] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A bleed-out meter capillary mouth colloid contact detection device comprising a meter carrier (1), characterized in that: The bottom of the instrument carrier (1) is bolted with a power interface (2) and a gas pipe interface (3), the inner side of the gas pipe interface (3) is clamped with a detection gas pipe (4), the outer side of the detection gas pipe (4) is provided with a coiled assembly (5), and the side of the detection gas pipe (4) away from the instrument carrier (1) is bolted with a detection end assembly (6); The detection end assembly (6) comprises a detection contact part (601), the side close to the detection gas pipe (4) of the detection contact part (601) is bolted with a connecting part (602), and the side close to the detection gas pipe (4) of the connecting part (602) is clamped with the detection gas pipe (4); the coiled assembly (5) comprises a carrier disc part (501), the front side of the carrier disc part (501) is provided with a matched front cover (502), the two sides of the carrier disc part (501) and the two sides of the matched front cover (502) are bolted with matched ear plates (503), and the inner side of the matched ear plate (503) is provided with a mounting screw rod (504); the carrier disc part (501) comprises a containing disc (5015), the rear side of the containing disc (5015) is bolted with a secondary frame (5011), the front side of the secondary frame (5011) is provided with a hollow stepped block (5012), the outer side of the hollow stepped block (5012) is rotationally connected with the carrier disc part (501), the front side of the outer side of the hollow stepped block (5012) is bolted with a winding disc (5013), the front side of the winding disc (5013) is bolted with a partition column (5014), and the outer side of the partition column (5014) is in contact with the detection gas pipe (4); the front side of the secondary frame (5011) is bolted with a fixed shaft (7), the outer side of the front side of the fixed shaft (7) is rotationally connected with the inner side of the hollow stepped block (5012), the outer side of the fixed shaft (7) is bolted with a reset coil spring (8), and the outer side of the reset coil spring (8) is bolted with the hollow stepped block (5012); the matched front cover (502) comprises an end cover (5021), the rear side of the end cover (5021) is bolted with a pressing spring (5022), the rear side of the pressing spring (5022) is bolted with a pressing plate (5023), and the pressing plate (5023) is arranged on the inner side of the containing disc (5015); the inner sides of the end cover (5021) and the pressing plate (5023) are both provided with a through insertion hole (9), the inner side of the through insertion hole (9) is used in cooperation with the partition column (5014), the rear side of the end cover (5021) is bolted with a limiting telescopic rod (14), and the rear side of the limiting telescopic rod (14) is bolted with the pressing plate (5023); the connecting part (602) comprises a sleeve frame (6021), the inner side of the sleeve frame (6021) is sleeved with the detection gas pipe (4), the outer side of the sleeve frame (6021) is provided with an external thread (6022), the outer side of the sleeve frame (6021) is bolted with an elastic sheet (6023) close to the detection gas pipe (4), and the outer side of the sleeve frame (6021) is threadedly connected with a fastening sleeve (6024) through the external thread (6022).

2. The device according to claim 1, wherein the device is a glue leakage detector. The inner side of the sleeve frame (6021) is provided with a matching groove (10), the inner side of the matching groove (10) is provided with a sealing sleeve (11), and the inner side of the matching groove (10) is sleeved with a detection air pipe (4).

3. The device of claim 1, wherein the capillary tip is formed by a capillary tube having a diameter of 0.5 mm to 2 mm. The detection contact part (601) comprises a hollow metal pipe (6011), the outer side of the hollow metal pipe (6011) is welded with a positioning ring (6012), the side, away from the detection air pipe (4), of the hollow metal pipe (6011) is provided with a ventilation groove (6013), the outer side of the hollow metal pipe (6011) is slidably connected with a sliding metal pipe (6014), the inner side of the sliding metal pipe (6014) is bolted with a force spring (6015), and the side, close to the positioning ring (6012), of the force spring (6015) is bolted with the positioning ring (6012).

4. The device of claim 3, wherein the capillary tip is formed by a capillary tube having a diameter of 0.5 mm to 2 mm. The side, close to the detection air pipe (4), of the hollow metal pipe (6011) is welded with the sleeve frame (6021), the outer side of the hollow metal pipe (6011) is bolted with an elastic card (12), the surface of the sliding metal pipe (6014) is bolted with a clamping ring (13), and the elastic card (12) is clamped with the clamping ring (13).

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