An airtightness detection device for a double-P radiant tube of an annealing furnace and its usage method

Abstract

The present invention provides an airtightness detection device for a double-P radiant tube of an annealing furnace and a method for using the same, including a conveyor and a double-P radiant tube body. A plurality of conveying platforms are arranged on the top of the conveyor. A double-P radiant tube fixing frame is installed on the top of each conveying platform. The double-P radiant tube fixing frame is used to fix the double-P radiant tube body. An airtightness detection mechanism and a defective product marking mechanism are installed on the conveyor frame. The airtightness detection mechanism includes a support frame fixedly connected to the conveyor frame. A first driving member is fixedly installed on the top of the support frame. The output end of the first driving member is connected with a position adjustment component. One side of the position adjustment component is connected with an air seat. Through the provided airtightness detection mechanism and the setting of the pushing adjustment component and the position adjustment component, the present invention can automatically adjust the position of the insertion seat to ensure the best sealing effect on the connection port of the double-P radiant tube body and improve the accuracy of airtightness detection.

Description

Technical Field

[0001] The present invention relates to the technical field of airtightness detection, and particularly relates to an airtightness detection device for double-P radiant tubes of an annealing furnace and a using method thereof. Background Art

[0002] The double-P radiant tube in an annealing furnace is a high-efficiency heat conduction device. The double-P radiant tube adopts a unique waste gas recirculation mechanism. By recovering the heat energy in the combustion exhaust gas, the overall thermal efficiency during long-term operation is significantly improved. Compared with traditional radiant tubes (such as W-type), it can provide a higher heat output under the same energy consumption. In addition, the internally designed insulation cavity and baffle structure can slow down the flue gas flow velocity, further enhancing the insulation effect and reducing energy loss. The double-P radiant tube has become a key component for balancing energy consumption, quality, and production efficiency in the annealing furnace through characteristics such as thermal efficiency optimization, process stability control, and environmental isolation. Therefore, the double-P radiant tube adopted has relatively high sealing requirements, and airtightness detection of the double-P radiant tube is required.

[0003] When detecting the airtightness of the double-P radiant tube of the annealing furnace, it is necessary to seal the connection port of the double-P radiant tube, and then fill it with detection gas, and measure the air pressure difference inside the double-P radiant tube within a certain period of time to detect the airtightness. When the existing airtightness detection device seals the interface of the double-P radiant tube, most of them use an inflatable airbag to seal the connection port of the double-P radiant tube. However, when the inflatable airbag is sealed, it is difficult to adjust the position of the inflatable airbag, which easily causes the position of the inflatable airbag to shift at the connection port of the double-P radiant tube, resulting in a large extrusion force at one place of the inflatable airbag and a smaller extrusion force at the corresponding other place, thus affecting the sealing performance and the accuracy of airtightness detection. Therefore, it is necessary to design an airtightness detection device for double-P radiant tubes of an annealing furnace and a using method thereof to improve the above problems. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide an airtightness detection device for double-P radiant tubes of an annealing furnace and a using method thereof, aiming to solve the problem that when the inflatable airbag of the airtightness detection device in the prior art seals the connection port of the double-P radiant tube of the annealing furnace, it is difficult to adjust the position of the inflatable airbag, which easily causes the position of the inflatable airbag to shift at the connection port of the double-P radiant tube, thus affecting the sealing performance and the accuracy of airtightness detection.

[0005] To solve the above technical problems, the present invention provides the following technical solutions:

[0006] An airtightness detection device for a double-P radiant tube of an annealing furnace, comprising a conveyor and a double-P radiant tube body. A plurality of conveying platforms are arranged on the top of the conveyor. A double-P radiant tube fixing bracket is installed on the top of each conveying platform. The double-P radiant tube fixing bracket is used to fix the double-P radiant tube body. An airtightness detection mechanism and a defective product marking mechanism are installed on the conveyor frame;

[0007] The airtightness detection mechanism includes a support frame fixedly connected to the conveyor frame. A first driving member is fixedly installed on the top of the support frame. The output end of the first driving member is connected with a position adjustment component. One side of the position adjustment component is connected with an air seat. One side of the air seat is connected with an insertion seat. A positioning baffle is fixedly connected to the outer side of the end of the insertion seat close to the air seat;

[0008] A first air chamber in a ring structure is arranged inside the air seat. A second air chamber is arranged inside the insertion seat. A ventilation groove communicating with the first air chamber is opened at the center of the side of the air seat close to the insertion seat. A through hole communicating with the second air chamber is opened at the center of the side of the insertion seat close to the air seat. A telescopic air pipe is fixedly connected between the ventilation groove and the through hole;

[0009] An air chamber linkage component is arranged between the positioning baffle and the first air chamber for conveying the gas in the first air chamber to the second air chamber;

[0010] A pushing and adjusting component is arranged inside the second air chamber for cooperating with the position adjustment component to adjust the position of the insertion seat;

[0011] An airbag is embedded and installed on the outer side of the end of the insertion seat away from the air seat. The airbag is communicated with the second air chamber through an exhaust groove. A ventilation component is arranged in the exhaust groove.

[0012] Preferably, the air chamber linkage component includes a plurality of push rods fixedly connected along the circumferential direction of one side of the positioning baffle. One end of the push rod penetrates through the air seat and is fixedly connected with a first piston inside the first air chamber. A second resetting member is sleeved on the outer side of the push rod between the air seat and the positioning baffle. A groove is opened at the position corresponding to the second resetting member on the outer wall of the air seat. One end of the second resetting member is placed inside the groove.

[0013] Preferably, the pushing and adjusting component includes a second piston arranged inside the second air chamber. A connecting seat is fixedly connected to the side of the second piston away from the air seat. A plurality of through holes communicating with the second air chamber are opened along the circumferential direction on the outer wall of the insertion seat. A moving column is slidably installed in each through hole. A linkage rod is movably hinged between the end of the moving column placed inside the second air chamber and the connecting seat.

[0014] Preferably, the position adjustment assembly includes a fixing plate fixedly connected to the output end of the first driving member. A cavity is formed in the fixing plate. An opening groove communicating with the cavity is formed on one side of the fixing plate. A moving plate is arranged in the cavity. One end of the air seat passes through the opening groove and is fixedly connected to the moving plate. Rollers are rotatably connected to both the top and bottom of the moving plate. First reset members are fixedly connected between both sides of the moving plate and the inner wall of the cavity. The length of the moving plate is greater than the length of the opening groove.

[0015] Preferably, the ventilation assembly includes a sealing seat fixedly connected inside the exhaust groove. A ventilation hole is formed inside the sealing seat. A sealing block is arranged in the ventilation hole. The sealing block is of a frustum structure. The shape of the ventilation hole is adapted to that of the sealing block. One end of the sealing block is fixedly connected to a moving rod passing through the ventilation hole. The end of the moving rod away from the sealing block is fixedly connected to a support block. The support block is slidably installed in the exhaust groove. A third reset member is sleeved outside the moving rod between the support block and the sealing seat. A plurality of air passing holes are formed in the support block.

[0016] Preferably, the defective product marking mechanism includes a connecting frame fixedly connected to the conveyor frame. A second driving member is fixedly installed on the connecting frame. The output end of the second driving member is fixedly connected to a fixed U-shaped frame. A guiding assembly and a marking assembly are arranged inside the fixed U-shaped frame.

[0017] Preferably, the guiding assembly includes a first fixed shaft fixedly connected inside the fixed U-shaped frame. A rotating U-shaped frame is rotatably connected to the first fixed shaft. Guide wheels are rotatably connected to both ends of the rotating U-shaped frame. Torsion springs are sleeved outside the first fixed shaft between both sides of the rotating U-shaped frame and the fixed U-shaped frame.

[0018] Preferably, the marking assembly includes a second fixed shaft fixedly connected inside the rotating U-shaped frame. A pen sleeve is rotatably connected to the second fixed shaft. A marking pen is installed inside the pen sleeve. A locking bolt for locking the position of the marking pen is connected to the outer wall of the pen sleeve. An inclined plate is fixedly connected to the top of the rotating U-shaped frame. An arc-shaped rod is fixedly connected to the top of the pen sleeve. One end of the arc-shaped rod penetrates through the inclined plate and is fixedly connected to a limiting block. A fourth reset member is sleeved outside the arc-shaped rod between the pen sleeve and the inclined plate. A limiting rod is fixedly connected inside the rotating U-shaped frame and at the bottom of the pen sleeve. The tip of the marking pen extends outside the guide wheel. When the fourth reset member is in the initial state, the pen sleeve is pushed to abut against the limiting rod, so that the pen sleeve and the marking pen are arranged obliquely downward.

[0019] Preferably, the double-P radiation tube fixing bracket includes a fixed base fixedly connected to the top of the conveying platform. At both the front and rear ends of the top of the fixed base, first side positioning blocks are fixedly connected. At one end of the top of the fixed base, two second side positioning blocks are fixedly connected. Above the other end of the fixed base, a connecting plate is provided. At the top of the connecting plate, two third side positioning blocks are fixedly connected. A threaded sleeve is fixedly connected to the connecting plate. A threaded rod is threadedly connected to the threaded sleeve. The threaded rod is installed on the fixed base through a bearing seat. One end of the threaded rod away from the threaded sleeve is fixedly connected with a handle. A first guide sleeve slidably sleeved outside the threaded sleeve is fixedly connected to the top of the fixed base. Guide rods are also fixedly connected to both sides of the threaded sleeve on the connecting plate. A second guide sleeve slidably sleeved outside the guide rod is fixedly connected to the top of the fixed base.

[0020] The present invention also provides a method for using an airtightness detection device for double-P radiation tubes of an annealing furnace, including the following steps:

[0021] S1. Place the double-P radiation tube body on the two first side positioning blocks and the two second side positioning blocks for preliminary positioning. Then, rotate the threaded rod through the handle to make the threaded rod screw into the threaded sleeve, adjust the position of the threaded sleeve. The threaded sleeve drives the connecting plate to move, adjust the position of the two third side positioning blocks, and move the third side positioning blocks close to the double-P radiation tube body, thereby clamping and fixing the double-P radiation tube body to complete the installation of the double-P radiation tube body on the double-P radiation tube fixing bracket of the conveying platform.

[0022] S2. The conveyor works to circulate and convey the conveying platform, so that the double-P radiation tube body reaches the positions of the airtightness detection mechanism and the defective product marking mechanism. The conveyor stops working, and the airtightness detection mechanism conducts an airtightness detection on the double-P radiation tube body.

[0023] S3. The first driving member in the airtightness detection mechanism works to push the air seat, the insertion seat, and the positioning baffle towards the double-P radiation tube body, so that the insertion seat is inserted into the connection port of the double-P radiation tube body, and the positioning baffle contacts the outer wall of the connection port of the double-P radiation tube body. As the first driving member continues to work, it pushes the positioning baffle and the insertion seat towards the air seat. At this time, the push rod pushes the first piston to move in the first air chamber, discharges the gas in the first air chamber into the ventilation groove, and then transports it to the second air chamber through the telescopic air pipe. The gas entering the second air chamber pushes the second piston to move, and the connecting seat moves synchronously with the second piston. Under the action of the linkage rod, it pushes the moving column to extend out of the insertion seat towards the outside through the through hole, so that a plurality of moving columns contact the inner wall of the connection port of the double-P radiation tube body, push the air seat and the moving plate to move, and make the moving plate move and adjust its position in the fixed plate until one end of all the moving columns contacts the inner wall of the connection port of the double-P radiation tube body, and the second piston stops moving, and the insertion seat is adjusted to the central position.

[0024] S4. After the position of the moving column is fixed, the position of the second piston is also fixed. At this time, the gas entering the second air chamber enters the exhaust groove. The gas pushes the sealing block outwards from the sealing seat through the air passing hole on the support block, separating the sealing block from the sealing seat. The third reset member contracts, and the gas enters the airbag, inflating the airbag to seal the connection port of the double P radiation tube body.

[0025] S5. Fill the double P radiation tube body with detection gas through the air supply device and air pipe of the airtightness detection device, and detect the change in air pressure inside the double P radiation tube body through the pressure detection device, so as to detect the airtightness of the double P radiation tube.

[0026] S6. When the airtightness of the double P radiation tube body is qualified, the first driving member resets, driving the air seat, insertion seat and positioning baffle to reset. The conveyor continues to work, transporting the next double P radiation tube body to the airtightness detection mechanism for detection.

[0027] S7. When the airtightness of the double P radiation tube body is unqualified, the first driving member resets, driving the air seat, insertion seat and positioning baffle to reset. Then the second driving member works to drive the fixed U-shaped frame to move downwards, driving the guiding component and marking component to move downwards synchronously, so that the tip of the marking pen first contacts the double P radiation tube body. As the second driving member continues to work, the guiding wheel contacts the double P radiation tube body. Under the action of the fourth reset member, the marking pen applies force to the surface of the double P radiation tube body. Then, as the second driving member continues to work, under the guiding action of the guiding wheel, the U-shaped frame rotates upwards on the first fixed shaft, causing the guiding wheel to roll along the outer wall of the double P radiation tube body and driving the marking pen to move on the outer wall of the double P radiation tube body for scribing and marking, so as to mark the double P radiation tube with unqualified airtightness detection, which is convenient for later screening. Then the second driving member resets, driving the guiding component and marking component to reset. The conveyor continues to work, transporting the next double P radiation tube body to the airtightness detection mechanism for detection.

[0028] Compared with the prior art, the present invention has at least the following beneficial effects:

[0029] 1. Through the airtightness detection mechanism provided in the present invention, when the first driving member works, it pushes the air seat, the insertion seat, and the positioning baffle towards the double-P radiation tube body, so that the insertion seat is inserted into the connection port of the double-P radiation tube body, and the positioning baffle contacts the outer wall of the connection port of the double-P radiation tube body. Then, it pushes the positioning baffle and the insertion seat closer to the air seat. The air chamber linkage assembly moves in the first air chamber, and the gas in the first air chamber is transported to the second air chamber through the ventilation groove, the telescopic air pipe, and the through hole. The gas entering the second air chamber will push the adjustment assembly to move. Under the combined action of pushing the adjustment assembly and the position adjustment assembly, the position of the insertion seat is adjusted, and the insertion seat is adjusted to the center position of the connection port of the double-P radiation tube body. Subsequently, the gas in the second air chamber pushes open the ventilation assembly, so that the gas enters the airbag through the exhaust groove, inflating and expanding the airbag to seal the connection port of the double-P radiation tube body. By setting the pushing adjustment assembly and the position adjustment assembly, the position of the insertion seat can be automatically adjusted to ensure the best sealing effect on the connection port of the double-P radiation tube body and improve the accuracy of airtightness detection.

[0030] 2. Through the defective product marking mechanism provided in the present invention, when the airtightness of the double-P radiation tube body fails the airtightness detection, the second driving member works to drive the guiding assembly and the marking assembly to move downward. The tip of the marking pen extends outside the guiding wheel, so that the tip of the marking pen first contacts the double-P radiation tube body. As the second driving member continues to work, the guiding wheel contacts the double-P radiation tube body. Under the action of the fourth reset member, the marking pen applies force to the surface of the double-P radiation tube body. Then, as the second driving member continues to work, under the guiding action of the guiding wheel, the U-shaped frame rotates upward on the first fixed shaft, so that the guiding wheel rolls along the outer wall of the double-P radiation tube body and drives the marking pen to move on the outer wall of the double-P radiation tube body for scribing and marking, thereby being able to mark the double-P radiation tube with unqualified airtightness detection for later screening. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0032] Figure 1 is the overall structural schematic diagram of the present invention;

[0033] Figure 2 is the structural schematic diagram of the airtightness detection mechanism of the present invention;

[0034] Figure 3 is the cross-sectional structural schematic diagram of the air seat and the insertion seat of the present invention;

[0035] Figure 4 is Figure 3A schematic diagram of the enlarged structure of region A;

[0036] Figure 5 It is a schematic diagram of the cross-sectional structure of the insertion seat of the present invention;

[0037] Figure 6 for Figure 5 A schematic diagram of the enlarged structure of region B in FIG.

[0038] Figure 7 It is a schematic diagram of the structure of the position adjustment component of the present invention;

[0039] Figure 8 It is a schematic diagram of the cross-sectional structure of a fixing plate in a position adjustment assembly of the present invention;

[0040] Figure 9 This is a schematic diagram of the structure of the defective product marking mechanism of the present invention;

[0041] Figure 10 It is a schematic diagram of the structure of the guide component and the marking component in the defective product marking mechanism of the present invention;

[0042] Figure 11 It is a schematic structural diagram of the double P radiation tube fixing frame of the present invention.

[0043] [Reference Signs]

[0044] 1. Conveyor;

[0045] 2. Conveying platform;

[0046] 3. Double P radiation tube fixing frame; 31. Fixed base; 32. First side positioning block; 33. Second side positioning block; 34. Connecting plate; 35. Third side positioning block; 36. Threaded sleeve; 37. First guide sleeve; 38. Threaded rod; 39. Bearing seat; 310. Guide rod; 311. Second guide sleeve;

[0047] 4. Double P radiant tube body;

[0048] 5. Air tightness detection mechanism; 51. Support frame; 52. First driving member; 53. Position adjustment component; 531. Fixed plate; 532. Open slot; 533. Moving plate; 534. First reset member; 54. Air seat; 541. First air cavity; 542. Ventilation groove; 543. Groove; 55. Positioning baffle; 56. Insertion seat; 561. Second air cavity; 562. Through hole; 563. Through hole; 564. Airbag; 565. Exhaust groove; 57. Air cavity linkage component; 571. Push rod; 572. First piston; 573. Second reset member; 58. Pushing and adjusting component; 581. Second piston; 582. Connecting seat; 583. Moving column; 584. Linkage rod; 59. Ventilation component; 591. Sealing seat; 592. Sealing block; 593. Moving rod; 594. Support block; 595. Third reset member; 596. Air through hole; 510. Telescopic air pipe

[0049] 6. Defective product marking mechanism; 61. Connecting frame; 62. Second driving member; 63. Fixed U-shaped frame; 64. Guide component; 641. First fixed shaft; 642. Rotating U-shaped frame; 643. Torsion spring; 644. Guide wheel; 65. Marking component; 651. Second fixed shaft; 652. Pen sleeve; 653. Marking pen; 654. Locking bolt; 655. Tilted plate; 656. Arc-shaped rod; 657. Fourth reset member

[0050] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure. However, this is only for schematic needs and is not intended to limit the present invention to this specific structure, device, and environment. According to specific needs, those of ordinary skill in the art can adjust or modify these devices and environments Detailed implementation manners

[0051] To make the technical problems solved by the present invention, the technical solutions adopted, and the achieved technical effects clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention

[0052] Embodiment: As Figures 1 to 11As shown in the figure, an airtightness detection device for a double-P radiant tube of an annealing furnace according to an embodiment of the present invention includes a conveyor 1 and a double-P radiant tube body 4. A plurality of conveying platforms 2 are arranged on the top of the conveyor 1, and a double-P radiant tube fixing frame 3 is installed on the top of each conveying platform 2. The double-P radiant tube fixing frame 3 is used to fix the double-P radiant tube body 4. In this embodiment, the double-P radiant tube body 4 is used in an annealing furnace. Of course, in other embodiments, the double-P radiant tube body 4 can also be used in high-temperature treatment equipment such as a reduction furnace. An airtightness detection mechanism 5 and a defective product marking mechanism 6 are installed on the frame of the conveyor 1. The double-P radiant tube body 4 is installed on the double-P radiant tube fixing frame 3 to fix its position, and then the conveying platform 2 is circulated and conveyed by the conveyor 1, so that the double-P radiant tube body 4 reaches the positions of the airtightness detection mechanism 5 and the defective product marking mechanism 6. The conveyor 1 stops working. An in-place sensor can be used, and the model of the in-place sensor can be selected according to the layout requirements of the production line. The airtightness detection mechanism 5 performs airtightness detection on the double-P radiant tube body 4. When the airtightness of the double-P radiant tube body 4 is detected to be unqualified, the defective product marking mechanism 6 marks the unqualified double-P radiant tube body 4 for later screening. Among them, the conveyor 1 and the conveying platform 2 are prior arts, and only need to be able to drive the double-P radiant tube fixing frame 3 and the double-P radiant tube body 4 for conveying, so no more details will be given here.

[0053] In this embodiment, as Figure 11As shown in the figure, the double-P radiation tube fixing bracket 3 includes a fixed base 31 fixedly connected to the top of the conveying platform 2. At both the front and rear ends of the top of the fixed base 31, first side positioning blocks 32 are fixedly connected. At one end of the top of the fixed base 31, two second side positioning blocks 33 are fixedly connected. Above the other end of the fixed base 31, a connecting plate 34 is provided. On the top of the connecting plate 34, two third side positioning blocks 35 are fixedly connected. A threaded sleeve 36 is fixedly connected to the connecting plate 34. A threaded rod 38 is threadedly connected inside the threaded sleeve 36. The threaded rod 38 is installed on the fixed base 31 through a bearing seat 39. One end of the threaded rod 38 away from the threaded sleeve 36 is fixedly connected with a handle. A first guide sleeve 37 is fixedly connected to the top of the fixed base 31 and slidably sleeved outside the threaded sleeve 36. On the connecting plate 34 and on both sides of the threaded sleeve 36, guide rods 310 are also fixedly connected. A second guide sleeve 311 is fixedly connected to the top of the fixed base 31 and slidably sleeved outside the guide rod 310. When fixing the double-P radiation tube body 4, first place the double-P radiation tube body 4 on the two first side positioning blocks 32 and the two second side positioning blocks 33 for preliminary positioning. Then rotate the threaded rod 38 through the handle, so that the threaded rod 38 screws into the threaded sleeve 36 to adjust the position of the threaded sleeve 36. Since the threaded sleeve 36 is connected to the connecting plate 34, the positions of the two third side positioning blocks 35 are adjusted. And through the sliding of the threaded sleeve 36 in the first guide sleeve 37 and the sliding of the guide rod 310 in the second guide sleeve 311, the stability of the movement of the connecting plate 34 and the third side positioning blocks 35 is improved. Move the third side positioning blocks 35 close to the double-P radiation tube body 4, thereby clamping and fixing the double-P radiation tube body 4. Since the first side positioning blocks 32, the second side positioning blocks 33, and the third side positioning blocks 35 are respectively located on the outer sides of the four sides of the double-P radiation tube body 4, the clamping and fixing stability of the double-P radiation tube body 4 is greatly improved, and the position deviation of the double-P radiation tube body 4 during the airtightness detection process is avoided, which affects the detection effect.

[0054] In this embodiment, as Figure 2 、 Figure 3 、 Figure 4 and Figure 5 shown, the airtightness detection mechanism 5 includes a support frame 51 fixedly connected to the frame of the conveyor 1. A first driving member 52 is fixedly installed on the top of the support frame 51. The first driving member 52 is preferably a cylinder, a hydraulic cylinder, etc. The output end of the first driving member 52 is connected to a position adjustment assembly 53. One side of the position adjustment assembly 53 is connected to an air seat 54. One side of the air seat 54 is connected to an insertion seat 56. A positioning baffle 55 is fixedly connected to the outside of one end of the insertion seat 56 close to the air seat 54;

[0055] Inside the air seat 54, there is a first air chamber 541 with an annular structure. Inside the insertion seat 56, there is a second air chamber 561. At the center of the side of the air seat 54 close to the insertion seat 56, there is a ventilation groove 542 communicating with the first air chamber 541. At the center of the side of the insertion seat 56 close to the air seat 54, there is a through hole 562 communicating with the second air chamber 561. A telescopic air pipe 510 is fixedly connected between the ventilation groove 542 and the through hole 562;

[0056] Between the positioning baffle 55 and the first air chamber 541, there is an air chamber linkage assembly 57 for delivering the gas in the first air chamber 541 to the second air chamber 561;

[0057] Inside the second air chamber 561, there is a pushing and adjusting assembly 58 for cooperating with the position adjusting assembly 53 to adjust the position of the insertion seat 56;

[0058] On the outer side of the end of the insertion seat 56 away from the air seat 54, an airbag 564 is embedded and installed. The airbag 564 is communicated with the second air chamber 561 through an exhaust groove 565, and an air ventilation assembly 59 is arranged in the exhaust groove 565.

[0059] In the specific implementation process, through the operation of the first driving member 52, the air seat 54, the insertion seat 56, and the positioning baffle 55 are pushed towards the double-P radiation tube body 4, so that the insertion seat 56 is inserted into the connection port of the double-P radiation tube body 4, and the positioning baffle 55 contacts the outer wall of the connection port of the double-P radiation tube body 4, thereby pushing the positioning baffle 55 and the insertion seat 56 closer to the air seat 54. At this time, the air chamber linkage assembly 57 moves in the first air chamber 541, and delivers the gas in the first air chamber 541 to the second air chamber 561 through the ventilation groove 542, the telescopic air pipe 510, and the through hole 562. The gas entering the second air chamber 561 will push the adjusting assembly 58 to move. Under the combined action of the pushing and adjusting assembly 58 and the position adjusting assembly 53, the position of the insertion seat 56 is adjusted, and the insertion seat 56 is adjusted to the central position of the connection port of the double-P radiation tube body 4. Subsequently, the gas in the second air chamber 561 will push open the air ventilation assembly 59, so that the gas enters the airbag 564 through the exhaust groove 565, inflating and expanding the airbag 564 to seal the connection port of the double-P radiation tube body 4. Through the setting of the pushing and adjusting assembly 58 and the position adjusting assembly 53, the position of the insertion seat 56 can be automatically adjusted to ensure the best sealing effect on the connection port of the double-P radiation tube body 4 and improve the accuracy of airtightness detection.

[0060] In this embodiment, the insertion seat 56 and the positioning baffle 55 may be provided with an air pipe for filling the detection gas into the double-P radiation tube body 4. The air pipe is connected to the gas supply equipment of the airtightness detection device, and a pressure detection device is also provided for detecting the change in the air pressure inside the double-P radiation tube body 4, so as to detect the airtightness of the double-P radiation tube.

[0061] In this embodiment, if Figure 3 As shown, the air cavity linkage assembly 57 includes a plurality of push rods 571 fixedly connected along the circumferential direction of one side of the positioning baffle 55, one end of the push rod 571 passes through the air seat 54 and is placed in the first air cavity 541 and is fixedly connected to the first piston 572, a second reset member 573 is sleeved between the air seat 54 and the positioning baffle 55 and located on the outer side of the push rod 571, and the second reset member 573 is preferably a spiral spring, and a groove 543 is provided on the outer wall of the air seat 54 at a position corresponding to the second reset member 573, and one end of the second reset member 573 is placed in the groove 543, and after the positioning baffle 55 contacts the outer wall of the connection port of the double P radiation tube body 4, the first reset member 573 is released. The continuous action of the driving member 52 presses the positioning baffle 55 against the outer wall of the connection port of the double P radiation tube body 4, thereby pushing the positioning baffle 55 to move closer to the air seat 54, so that the push rod 571 pushes the first piston 572 to move in the first air cavity 541, and discharges the gas in the first air cavity 541 into the ventilation groove 542, and then transports it to the second air cavity 561 through the telescopic air pipe 510. When the air tightness test is completed, the positioning baffle 55 is separated from the double P radiation tube body 4, and the positioning baffle 55, the push rod 571 and the first piston 572 are reset under the action of the second reset member 573 to facilitate the next test.

[0062] In this embodiment, if Figure 4 As shown, the pushing and adjusting assembly 58 includes a second piston 581 arranged in the second air cavity 561, and the second piston 581 is fixedly connected to a connecting seat 582 on the side away from the air seat 54. A plurality of through holes 563 communicating with the second air cavity 561 are opened on the outer wall of the insertion seat 56 in a circumferential direction, and a moving column 583 is slidably installed in each of the through holes 563. A linkage rod 584 is movably hinged between one end of the moving column 583 placed in the second air cavity 561 and the connecting seat 582.

[0063] In this embodiment, if Figure 7 and Figure 8 As shown, the position adjustment component 53 includes a fixed plate 531 fixedly connected to the output end of the first driving member 52, a cavity is opened on the fixed plate 531, an open groove 532 communicating with the cavity is opened on one side of the fixed plate 531, a movable plate 533 is arranged in the cavity, one end of the air seat 54 passes through the open groove 532 and is fixedly connected to the movable plate 533, the top and bottom of the movable plate 533 are rotatably connected with rollers, and first reset members 534 are fixedly connected between both sides of the movable plate 533 and the inner wall of the cavity, the first reset member 534 is preferably a coil spring, and the length of the movable plate 533 is greater than the length of the open groove 532.

[0064] In the specific implementation process, the gas entering the second air chamber 561 pushes the second piston 581 to move, and the connecting seat 582 moves synchronously with the second piston 581. Under the action of the linkage rod 584, the moving column 583 is pushed to extend out of the through hole 563 towards the outside of the insertion seat 56, so that a plurality of moving columns 583 contact the inner wall of the connection port of the double-P radiation tube body 4. Since the distances that the plurality of moving columns 583 extend out of the insertion seat 56 are the same, the air seat 54 and the moving plate 533 are pushed to move, so that the moving plate 533 moves and adjusts its position within the fixed plate 531 until one end of each of the plurality of moving columns 583 contacts the inner wall of the connection port of the double-P radiation tube body 4, and the second piston 581 stops moving, thereby adjusting the insertion seat 56 to the central position to ensure the sealing effect of the airbag 564 on the connection port of the double-P radiation tube body 4. Among them, rollers are provided at the top and bottom of the moving plate 533 to reduce the friction when the moving plate 533 moves within the cavity of the fixed plate 531, which helps to adjust the position of the insertion seat 56. Among them, the first reset member 534 is provided to reset the position of the moving plate 533 when in the non-use state, thereby resetting the insertion seat 56 for the next detection and use.

[0065] In this embodiment, as Figure 5 and Figure 6As shown, the ventilation component 59 includes a sealing seat 591 fixedly connected inside the exhaust groove 565. A ventilation hole is provided inside the sealing seat 591. A sealing block 592 is arranged in the ventilation hole. The sealing block 592 is of a frustum shape, and the shape of the ventilation hole is adapted to that of the sealing block 592. The diameters of both the sealing block 592 and the ventilation hole gradually increase from the second air chamber 561 towards the airbag 564. One end of the sealing block 592 is fixedly connected to a moving rod 593 passing through the ventilation hole. The end of the moving rod 593 away from the sealing block 592 is fixedly connected to a support block 594. The support block 594 is slidably installed in the exhaust groove 565. A third reset member 595 is sleeved outside the moving rod 593 between the support block 594 and the sealing seat 591. The third reset member 595 is preferably a spiral spring. A plurality of air passing holes 596 are provided on the support block 594. After the position of the moving column 583 is fixed, the position of the second piston 581 is also fixed accordingly. At this time, the gas entering the second air chamber 561 enters the exhaust groove 565. The gas pushes the sealing block 592 towards the outside of the sealing seat 591 through the air passing holes 596 on the support block 594, causing the sealing block 592 to separate from the sealing seat 591. The third reset member 595 contracts, and the gas enters the airbag 564, causing the airbag 564 to expand and seal the connection port of the double P radiation tube body 4. Through the action of the ventilation component 59, the exhaust groove 565 is first closed and partitioned. Before the pushing and adjusting component 58 acts to adjust the position of the insertion seat 56, the gas will not enter the airbag 564. After the pushing and adjusting component 58 acts to adjust the position of the insertion seat 56, the gas will enter the airbag 564, causing the airbag 564 to expand and seal the connection port of the double P radiation tube body 4, improving the sealing effect.

[0066] In this embodiment, as Figure 9 and Figure 10 shown, the defective product marking mechanism 6 includes a connecting frame 61 fixedly connected to the frame of the conveyor 1. A second driving member 62 is fixedly installed on the connecting frame 61. The second driving member 62 is preferably a cylinder, a hydraulic cylinder, etc. The output end of the second driving member 62 is fixedly connected to a fixed U-shaped frame 63. A guiding component 64 and a marking component 65 are arranged inside the fixed U-shaped frame 63.

[0067] The guiding component 64 includes a first fixed shaft 641 fixedly connected inside the fixed U-shaped frame 63. A rotating U-shaped frame 642 is rotatably connected to the first fixed shaft 641. Guide wheels 644 are rotatably connected to both ends of the rotating U-shaped frame 642. A torsion spring 643 is sleeved outside the first fixed shaft 641 between both sides of the rotating U-shaped frame 642 and the fixed U-shaped frame 63.

[0068] The marking component 65 includes a second fixed shaft 651 fixedly connected to the inside of the rotating U-shaped frame 642. A pen sleeve 652 is rotatably connected to the second fixed shaft 651. A marking pen 653 is installed inside the pen sleeve 652. A locking bolt 654 for locking the position of the marking pen 653 is connected to the outer wall of the pen sleeve 652. An inclined plate 655 is fixedly connected to the top of the rotating U-shaped frame 642. An arc-shaped rod 656 is fixedly connected to the top of the pen sleeve 652. One end of the arc-shaped rod 656 penetrates through the inclined plate 655 and is fixedly connected with a limiting block. A fourth reset member 657 is sleeved between the pen sleeve 652 and the inclined plate 655 and outside the arc-shaped rod 656. The fourth reset member 657 is preferably a threaded spring. A limiting rod is fixedly connected to the inside of the rotating U-shaped frame 642 and at the bottom of the pen sleeve 652. The tip of the marking pen 653 extends outside the guide wheel 644. When the fourth reset member 657 is in the initial state, it pushes the pen sleeve 652 to abut against the limiting rod, making the pen sleeve 652 and the marking pen 653 inclined downward.

[0069] In the specific implementation process, when the airtightness of the double-P radiation tube body 4 fails the airtightness detection, the second driving member 62 works to drive the fixed U-shaped frame 63 to move downward, driving the guide assembly 64 and the marking component 65 to move downward synchronously. Since the tip of the marking pen 653 extends outside the guide wheel 644, the tip of the marking pen 653 first contacts the double-P radiation tube body 4. As the second driving member 62 continues to work, the guide wheel 644 contacts the double-P radiation tube body 4. During this process, the marking pen 653 rotates upward on the second fixed shaft 651 through the pen sleeve 652, making the arc-shaped rod 656 slide guidingly on the inclined plate 655 and squeezing the fourth reset member 657. Under the action of the fourth reset member 657, a downward force is applied to the pen sleeve 652 and the marking pen 653, increasing the contact force between the marking pen 653 and the double-P radiation tube body 4, so that the marking pen 653 applies a force on the surface of the double-P radiation tube body 4. Then, by continuing to work the second driving member 62, under the guiding action of the guide wheel 644, the rotating U-shaped frame 642 rotates upward on the first fixed shaft 641, making the guide wheel 644 roll along the outer wall of the double-P radiation tube body 4 and driving the marking pen 653 to move on the outer wall of the double-P radiation tube body 4 for scribing marks, so as to be able to mark the double-P radiation tubes with unqualified airtightness detection, facilitating later screening. Among them, when the second driving member 62 is reset, the rotating U-shaped frame 642 is reset by the torsion spring 643, and the pen sleeve 652 is reset by the fourth reset member 657 for the next detection. By connecting a locking bolt 654 for locking the position of the marking pen 653 on the pen sleeve 652, it is convenient to disassemble and replace the marking pen 653 to ensure the clarity of the scribing marks.

[0070] In this embodiment, the present invention also provides a usage method of the airtightness detection device for the double-P radiation tube of the annealing furnace, including the following steps:

[0071] S1. Place the double-P radiation tube body 4 on the two first side positioning blocks 32 and the two second side positioning blocks 33 for preliminary positioning. Then, rotate the threaded rod 38 through the handle, so that the threaded rod 38 screws into the threaded sleeve 36, adjust the position of the threaded sleeve 36. The threaded sleeve 36 drives the connecting plate 34 to move, adjust the position of the two third side positioning blocks 35, move the third side positioning blocks 35 close to the double-P radiation tube body 4, so as to clamp and fix the double-P radiation tube body 4, and complete the installation of the double-P radiation tube body 4 on the double-P radiation tube fixing rack 3 of the conveying platform 2;

[0072] S2. The conveyor 1 works to circulate the conveying platform 2, so that the double-P radiation tube body 4 reaches the positions of the airtightness detection mechanism 5 and the defective product marking mechanism 6. The conveyor 1 stops working, and the airtightness detection mechanism 5 performs airtightness detection on the double-P radiation tube body 4;

[0073] S3. The first driving member 52 in the airtightness detection mechanism 5 works, pushing the air seat 54, the insertion seat 56 and the positioning baffle 55 to move towards the double-P radiation tube body 4, so that the insertion seat 56 is inserted into the connection port of the double-P radiation tube body 4, and the positioning baffle 55 contacts the outer wall of the connection port of the double-P radiation tube body 4. As the first driving member 52 continues to work, it pushes the positioning baffle 55 and the insertion seat 56 to move closer to the air seat 54. At this time, the push rod 571 pushes the first piston 572 to move in the first air chamber 541, discharges the gas in the first air chamber 541 into the ventilation groove 542, and then transports it to the second air chamber 561 through the telescopic air pipe 510. The gas entering the second air chamber 561 pushes the second piston 581 to move, and the connecting seat 582 moves synchronously with the second piston 581. Under the action of the linkage rod 584, it pushes the moving column 583 to extend out of the insertion seat 56 through the through hole 563, so that a plurality of moving columns 583 contact the inner wall of the connection port of the double-P radiation tube body 4, and push the air seat 54 and the moving plate 533 to move, so that the moving plate 533 moves and adjusts its position in the fixed plate 531 until one end of all the moving columns 583 contacts the inner wall of the connection port of the double-P radiation tube body 4, and the second piston 581 stops moving, and adjusts the insertion seat 56 to the central position;

[0074] S4. After the position of the moving column 583 is fixed, the position of the second piston 581 is also fixed accordingly. At this time, the gas entering the second air chamber 561 enters the exhaust groove 565, and the gas pushes the sealing block 592 out of the sealing seat 591 through the air through hole 596 on the support block 594, so that the sealing block 592 is separated from the sealing seat 591, and the third reset member 595 contracts. The gas enters the airbag 564 and expands the airbag 564 to seal the connection port of the double-P radiation tube body 4;

[0075] S5. Fill the double-P radiant tube body 4 with a detection gas through the gas supply equipment and the air pipe of the airtightness detection device, and detect the change in the air pressure inside the double-P radiant tube body 4 through the pressure detection device, so as to detect the airtightness of the double-P radiant tube;

[0076] S6. When the airtightness of the double-P radiant tube body 4 is qualified, the first driving member 52 resets, driving the air seat 54, the insertion seat 56 and the positioning baffle 55 to reset, and the conveyor 1 continues to work, moving the next double-P radiant tube body 4 to the airtightness detection mechanism 5 for detection;

[0077] S7. When the airtightness of the double-P radiant tube body 4 is unqualified, the first driving member 52 resets, driving the air seat 54, the insertion seat 56 and the positioning baffle 55 to reset, and then the second driving member 62 works to drive the fixed U-shaped frame 63 to move downward, driving the guiding component 64 and the marking component 65 to move downward synchronously, so that the tip of the marking pen 653 first contacts the double-P radiant tube body 4. As the second driving member 62 continues to work, the guiding wheel 644 contacts the double-P radiant tube body 4. Under the action of the fourth reset member 657, the marking pen 653 applies force on the surface of the double-P radiant tube body 4. Then, through the continuous work of the second driving member 62, under the guiding action of the guiding wheel 644, the rotating U-shaped frame 642 rotates upward on the first fixed shaft 641, so that the guiding wheel 644 rolls along the outer wall of the double-P radiant tube body 4, driving the marking pen 653 to move on the outer wall of the double-P radiant tube body 4 for scribing and marking, so as to mark the double-P radiant tube with unqualified airtightness detection, which is convenient for later screening. Then, the second driving member 62 resets, driving the guiding component 64 and the marking component 65 to reset, and the conveyor 1 continues to work, moving the next double-P radiant tube body 4 to the airtightness detection mechanism 5 for detection.

[0078] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An airtightness detection device for a double-P radiant tube of an annealing furnace, comprising a conveyor (1) and a double-P radiant tube body (4), wherein a plurality of conveying platforms (2) are arranged on the top of the conveyor (1), and it is characterized in that, At the top of each of the conveying platforms (2), a double-P radiant tube fixing bracket (3) is installed, and the double-P radiant tube fixing bracket (3) is used to fix the double-P radiant tube body (4). An airtightness detection mechanism (5) and a defective product marking mechanism (6) are installed on the frame of the conveyor (1). The airtightness detection mechanism (5) includes a support frame (51) fixedly connected to the frame of the conveyor (1). At the top of the support frame (51), a first driving member (52) is fixedly installed. The output end of the first driving member (52) is connected to a position adjustment assembly (53). One side of the position adjustment assembly (53) is connected to an air seat (54). One side of the air seat (54) is connected to an insertion seat (56). A positioning baffle (55) is fixedly connected to the outer side of the end of the insertion seat (56) close to the air seat (54). A first air chamber (541) in a ring structure is arranged inside the air seat (54). A second air chamber (561) is arranged inside the insertion seat (56). An air vent groove (542) communicating with the first air chamber (541) is opened at the center of the side of the air seat (54) close to the insertion seat (56). A through hole (562) communicating with the second air chamber (561) is opened at the center of the side of the insertion seat (56) close to the air seat (54). A telescopic air pipe (510) is fixedly connected between the air vent groove (542) and the through hole (562). An air chamber linkage assembly (57) is arranged between the positioning baffle (55) and the first air chamber (541) for delivering the gas in the first air chamber (541) into the second air chamber (561). A pushing and adjusting assembly (58) is arranged inside the second air chamber (561) for cooperating with the position adjustment assembly (53) to adjust the position of the insertion seat (56). An airbag (564) is embedded and installed on the outer side of the end of the insertion seat (56) far from the air seat (54). The airbag (564) is communicated with the second air chamber (561) through an exhaust groove (565). An air vent assembly (59) is arranged inside the exhaust groove (565). The pushing and adjusting assembly (58) includes a second piston (581) arranged inside the second air chamber (561). A connecting seat (582) is fixedly connected to the side of the second piston (581) far from the air seat (54). A plurality of through holes (563) communicating with the second air chamber (561) are opened on the outer wall of the insertion seat (56) along the circumferential direction. A moving column (583) is slidably installed in each of the through holes (563). A linkage rod (584) is movably hinged between the end of the moving column (583) placed inside the second air chamber (561) and the connecting seat (582). The position adjustment component (53) includes a fixing plate (531) fixedly connected to the output end of the first driving member (52). A cavity is formed in the fixing plate (531). An opening groove (532) communicating with the cavity is formed on one side of the fixing plate (531). A moving plate (533) is arranged in the cavity. One end of the air seat (54) passes through the opening groove (532) and is fixedly connected to the moving plate (533). Rollers are rotatably connected to both the top and bottom of the moving plate (533). First restoring members (534) are fixedly connected between both sides of the moving plate (533) and the inner wall of the cavity. The length of the moving plate (533) is greater than the length of the opening groove (532).

2. The airtightness detection device for the double-P radiant tubes of an annealing furnace according to claim 1, characterized in that, The air cavity linkage component (57) includes a plurality of push rods (571) fixedly connected along the circumferential direction on one side of the positioning baffle (55). One end of the push rod (571) penetrates through the air seat (54) and is fixedly connected with a first piston (572) in the first air cavity (541). A second restoring member (573) is sleeved outside the push rod (571) between the air seat (54) and the positioning baffle (55). A groove (543) is formed on the outer wall of the air seat (54) corresponding to the position of the second restoring member (573). One end of the second restoring member (573) is placed in the groove (543).

3. The airtightness detection device for the double-P radiant tubes of an annealing furnace according to claim 1, characterized in that The ventilation component (59) includes a sealing seat (591) fixedly connected inside the exhaust groove (565). A ventilation hole is formed inside the sealing seat (591). A sealing block (592) is arranged in the ventilation hole. The sealing block (592) is of a frustum structure. The shape of the ventilation hole is adapted to that of the sealing block (592). One end of the sealing block (592) is fixedly connected with a moving rod (593) passing through the ventilation hole. The end of the moving rod (593) away from the sealing block (592) is fixedly connected with a support block (594). The support block (594) is slidably installed in the exhaust groove (565). A third restoring member (595) is sleeved outside the moving rod (593) between the support block (594) and the sealing seat (591). A plurality of air passing holes (596) are formed in the support block (594).

4. An airtightness detection device for a double-P radiant tube of an annealing furnace according to claim 1, characterized in that, The defective product marking mechanism (6) includes a connecting frame (61) fixedly connected to the frame of the conveyor (1). A second driving member (62) is fixedly installed on the connecting frame (61). The output end of the second driving member (62) is fixedly connected with a fixed U-shaped frame (63). A guiding component (64) and a marking component (65) are arranged inside the fixed U-shaped frame (63).

5. An airtightness detection device for a double-P radiant tube of an annealing furnace according to claim 4, characterized in that, The guiding component (64) includes a first fixed shaft (641) fixedly connected inside the fixed U-shaped frame (63). A rotating U-shaped frame (642) is rotatably connected to the first fixed shaft (641). Guide wheels (644) are rotatably connected to both ends of the rotating U-shaped frame (642). A torsion spring (643) is sleeved outside the first fixed shaft (641) between both sides of the rotating U-shaped frame (642) and the fixed U-shaped frame (63).

6. The airtightness detection device for the double-P radiant tubes of an annealing furnace according to claim 5, characterized in that, The marking component (65) includes a second fixed shaft (651) fixedly connected inside the rotating U-shaped frame (642). A pen sleeve (652) is rotatably connected to the second fixed shaft (651). A marking pen (653) is installed inside the pen sleeve (652). A locking bolt (654) for locking the position of the marking pen (653) is connected to the outer wall of the pen sleeve (652). An inclined plate (655) is fixedly connected to the top of the rotating U-shaped frame (642). An arc-shaped rod (656) is fixedly connected to the top of the pen sleeve (652). One end of the arc-shaped rod (656) penetrates through the inclined plate (655) and is fixedly connected with a limiting block. A fourth reset member (657) is sleeved outside the arc-shaped rod (656) between the pen sleeve (652) and the inclined plate (655). A limiting rod is fixedly connected inside the rotating U-shaped frame (642) and at the bottom of the pen sleeve (652). The tip of the marking pen (653) extends outside the guide wheel (644). When the fourth reset member (657) is in the initial state, the pen sleeve (652) is pushed against the limiting rod, so that the pen sleeve (652) and the marking pen (653) are arranged obliquely downward.

7. An airtightness detection device for a double-P radiant tube of an annealing furnace according to claim 1, characterized in that, The double P-radiation tube fixing bracket (3) includes a fixed base (31) fixedly connected to the top of the conveying platform (2). First side positioning blocks (32) are fixedly connected to both the front and rear ends of the top of the fixed base (31). Two second side positioning blocks (33) are fixedly connected to one end of the top of the fixed base (31). A connecting plate (34) is arranged above the other end of the fixed base (31). Two third side positioning blocks (35) are fixedly connected to the top of the connecting plate (34). A threaded sleeve (36) is fixedly connected to the connecting plate (34). A threaded rod (38) is threadedly connected inside the threaded sleeve (36). The threaded rod (38) is installed on the fixed base (31) through a bearing seat (39). A handle is fixedly connected to the end of the threaded rod (38) away from the threaded sleeve (36). A first guide sleeve (37) slidably sleeved outside the threaded sleeve (36) is fixedly connected to the top of the fixed base (31). Guide rods (310) are also fixedly connected to both sides of the threaded sleeve (36) on the connecting plate (34). A second guide sleeve (311) slidably sleeved outside the guide rods (310) is fixedly connected to the top of the fixed base (31).

8. A method for using an airtightness detection device for a double-P radiant tube of an annealing furnace according to any one of claims 1-7, characterized in that, Comprising the following steps: S1. Place the double-P radiation tube body (4) on the two first-side positioning blocks (32) and the two second-side positioning blocks (33) for preliminary positioning. Then, rotate the threaded rod (38) through the handle to make the threaded rod (38) screw into the threaded sleeve (36), adjust the position of the threaded sleeve (36). The threaded sleeve (36) drives the connecting plate (34) to move, adjust the position of the two third-side positioning blocks (35), and move the third-side positioning blocks (35) closer to the double-P radiation tube body (4), so as to clamp and fix the double-P radiation tube body (4), and complete the installation of the double-P radiation tube body (4) on the double-P radiation tube fixing bracket (3) of the conveying platform (2); S2. The conveyor (1) works to circulate the conveying platform (2) so that the double-P radiation tube body (4) reaches the positions of the airtightness detection mechanism (5) and the defective product marking mechanism (6). The conveyor (1) stops working, and the airtightness detection mechanism (5) performs airtightness detection on the double-P radiation tube body (4); S3. The first driving member (52) in the airtightness detection mechanism (5) works to push the air seat (54), the insertion seat (56), and the positioning baffle (55) towards the double-P radiation tube body (4), so that the insertion seat (56) is inserted into the connection port of the double-P radiation tube body (4), and the positioning baffle (55) contacts the outer wall of the connection port of the double-P radiation tube body (4). As the first driving member (52) continues to work, it pushes the positioning baffle (55) and the insertion seat (56) towards the air seat (54). At this time, the push rod (571) pushes the first piston (572) to move in the first air chamber (541), discharges the gas in the first air chamber (541) into the ventilation groove (542), and then transports it to the second air chamber (561) through the telescopic air pipe (510). The gas entering the second air chamber (561) pushes the second piston (581) to move, and the connecting seat (582) moves synchronously with the second piston (581). Under the action of the linkage rod (584), it pushes the moving column (583) to extend out of the insertion seat (56) towards the outside through the through hole (563), so that a plurality of moving columns (583) contact the inner wall of the connection port of the double-P radiation tube body (4), and push the air seat (54) and the moving plate (533) to move, so that the moving plate (533) moves and adjusts its position in the fixed plate (531) until one end of all the moving columns (583) contacts the inner wall of the connection port of the double-P radiation tube body (4), and the second piston (581) stops moving, and adjusts the insertion seat (56) to the central position; S4. After the position of the moving column (583) is fixed, the position of the second piston (581) is also fixed. At this time, the gas entering the second air chamber (561) enters the exhaust groove (565). The gas pushes the sealing block (592) outwards from the sealing seat (591) through the air passing hole (596) on the support block (594), separating the sealing block (592) from the sealing seat (591). The third reset member (595) contracts, and the gas enters the airbag (564), inflating the airbag (564) to seal the connection port of the double P radiation tube body (4). S5. The detection gas is filled into the double P radiation tube body (4) through the air supply device and the air pipe of the airtightness detection device, and the change of the air pressure in the double P radiation tube body (4) is detected by the pressure detection device, so as to detect the airtightness of the double P radiation tube. S6. When the airtightness of the double P radiation tube body (4) is qualified, the first driving member (52) resets, driving the air seat (54), the insertion seat (56) and the positioning baffle (55) to reset. The conveyor (1) continues to work, and the next double P radiation tube body (4) is transferred to the airtightness detection mechanism (5) for detection. S7. When the airtightness of the double P radiation tube body (4) is unqualified, the first driving member (52) resets, driving the air seat (54), the insertion seat (56) and the positioning baffle (55) to reset. Then the second driving member (62) works to drive the fixed U-shaped frame (63) to move downwards, driving the guiding component (64) and the marking component (65) to move downwards synchronously, so that the tip of the marking pen (653) first contacts the double P radiation tube body (4). As the second driving member (62) continues to work, the guiding wheel (644) contacts the double P radiation tube body (4). Under the action of the fourth reset member (657), the marking pen (653) applies force to the surface of the double P radiation tube body (4). Then, through the continuous work of the second driving member (62), under the guiding action of the guiding wheel (644), the rotating U-shaped frame (642) rotates upwards on the first fixed shaft (641), so that the guiding wheel (644) rolls along the outer wall of the double P radiation tube body (4), driving the marking pen (653) to move on the outer wall of the double P radiation tube body (4) for scribing and marking, so as to mark the double P radiation tube with unqualified airtightness detection, which is convenient for later screening. Then the second driving member (62) resets, driving the guiding component (64) and the marking component (65) to reset. The conveyor (1) continues to work, and the next double P radiation tube body (4) is transferred to the airtightness detection mechanism (5) for detection.

Images