Device for detecting air tightness of double-P radiant tube of annealing furnace and use method of device

Abstract

The invention provides an annealing furnace double-P radiant tube airtightness detection device and a use method thereof.The annealing furnace double-P radiant tube airtightness detection device comprises a conveyor and a double-P radiant tube body, the top of the conveyor is provided with a plurality of conveying platforms, the top of each conveying platform is provided with a double-P radiant tube fixing frame, and the double-P radiant tube fixing frames are used for fixing the double-P radiant tube body; an air tightness detection mechanism and an inferior-quality product marking mechanism are installed on the conveyor rack, the air tightness detection mechanism comprises a supporting frame fixedly connected to the conveyor rack, a first driving part is fixedly installed at the top of the supporting frame, and the output end of the first driving part is connected with a position adjusting assembly; one side of the position adjusting assembly is connected with an air seat, and through the arrangement of the air tightness detection mechanism, the push adjusting assembly and the position adjusting assembly, the position of the insertion seat can be automatically adjusted, so that the optimal sealing effect of the connector of the double-P radiant tube body is ensured, and the accuracy of air tightness detection is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of airtightness detection, and particularly relates to an airtightness detection device for a double-P radiant tube of an annealing furnace and a method for using the same. 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, it significantly improves the overall thermal efficiency during long-term operation. 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 heat preservation cavity and baffle structure can slow down the flue gas flow velocity, further enhancing the heat preservation effect and reducing energy loss. The double-P radiant tube has become a key component in the annealing furnace to balance energy consumption, quality, and production efficiency through characteristics such as optimized thermal efficiency, process stability control, and environmental isolation. Therefore, the double-P radiant tube adopted has relatively high sealing requirements, and it is necessary to detect the airtightness of the double-P radiant tube.

[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 the 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 block the connection port of the double-P radiant tube for sealing. However, when using the inflatable airbag for sealing, 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 a double-P radiant tube of an annealing furnace and a method for using the same 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 a double-P radiant tube of an annealing furnace and a method for using the same, 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: An airtightness detection device for a double-P radiant tube of an annealing furnace, including a conveyor and a double-P radiant tube body. A plurality of conveying platforms are arranged on the top of the conveyor, and 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, and an airtightness detection mechanism and a defective product marking mechanism are installed on the conveyor frame; The air tightness detection mechanism comprises a support frame fixedly connected to the conveyor frame, a first driving member is fixedly installed on the top of the support frame, an output end of the first driving member is connected to a position adjustment component, one side of the position adjustment component is connected to an air seat, one side of the air seat is connected to an insertion seat, and a positioning baffle is fixedly connected to the outer side of one end of the insertion seat close to the air seat; A first air cavity with an annular structure is provided inside the air seat, a second air cavity is provided inside the insertion seat, a ventilation groove communicating with the first air cavity is provided at the center of one side of the air seat close to the insertion seat, a through hole communicating with the second air cavity is provided at the center of one side of the insertion seat close to the air seat, and a telescopic air pipe is fixedly connected between the ventilation groove and the through hole; An air cavity linkage assembly is provided between the positioning baffle and the first air cavity, for conveying the gas in the first air cavity to the second air cavity; A push adjustment component is disposed in the second air cavity, and is used to cooperate with the position adjustment component to adjust the position of the insertion seat; An air bag is embedded and installed on the outer side of one end of the insertion seat away from the air seat. The air bag is connected to the second air cavity through an exhaust groove, and a ventilation component is arranged in the exhaust groove.

[0006] Preferably, the air cavity linkage assembly 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 passes through the air seat and is placed in the first air cavity and fixedly connected to the first piston, a second reset member is sleeved between the air seat and the positioning baffle and located on the outer side of the push rod, a groove is opened on the outer wall of the air seat corresponding to the position of the second reset member, and one end of the second reset member is placed in the groove.

[0007] Preferably, the pushing and adjusting assembly includes a second piston arranged in the second air cavity, and the second piston is fixedly connected to a connecting seat on the side away from the air seat, and a plurality of through holes communicating with the second air cavity are opened on the outer wall of the insertion seat in a circumferential direction, and a moving column is slidably installed in each of the through holes, and a linkage rod is movably hinged between one end of the moving column placed in the second air cavity and the connecting seat.

[0008] Preferably, the position adjustment assembly includes a fixed plate fixedly connected to the output end of the first driving member, a cavity is opened on the fixed plate, an open groove communicating with the cavity is opened on one side of the fixed plate, a movable plate is arranged in the cavity, one end of the air seat passes through the open groove and is fixedly connected to the movable plate, the top and bottom of the movable plate are rotatably connected to rollers, a first reset member is fixedly connected between both sides of the movable plate and the inner wall of the cavity, and the length of the movable plate is greater than the length of the open groove.

[0009] Preferably, the ventilation component includes a sealing seat fixedly connected inside the exhaust groove. A ventilation hole is provided inside the sealing seat. A sealing block is arranged in the ventilation hole. The sealing block is of a frustum of a cone structure, and 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 provided on the support block.

[0010] 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 component and a marking component are arranged inside the fixed U-shaped frame.

[0011] Preferably, the guiding component 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.

[0012] Preferably, the marking component 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, it pushes the pen sleeve to abut against the limiting rod, so that the pen sleeve and the marking pen are arranged obliquely downward.

[0013] 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, there is a connecting plate. 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.

[0014] The present invention also provides a usage method of an airtightness detection device for a double-P radiation tube of an annealing furnace, including the following steps: 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, so as to clamp and fix the double-P radiation tube body, and complete the installation of the double-P radiation tube body on the double-P radiation tube fixing bracket of the conveying platform. 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 performs airtightness detection on the double-P radiation tube body. 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 in 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 adjusts the insertion seat to the central position. 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 holes 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. 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 of the 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. S6. When the airtightness of the double-P radiation tube body is qualified, the first driving member resets, driving the air seat, the insertion seat and the positioning baffle to reset. The conveyor continues to work, and transfers the next double-P radiation tube body to the airtightness detection mechanism for detection. S7. When the airtightness of the double-P radiation tube body is unqualified, the first driving member resets, driving the air seat, the insertion seat and the positioning baffle to reset. Then the second driving member works to drive the fixed U-shaped frame to move downwards, driving the guiding assembly and the marking assembly 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, and the guiding wheel rolls along the outer wall of the double-P radiation tube body, 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 assembly and the marking assembly to reset. The conveyor continues to work, and transfers the next double-P radiation tube body to the airtightness detection mechanism for detection.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: 1. Through the airtightness detection mechanism provided by 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. Thus, it pushes the positioning baffle and the insertion seat closer to the air seat. The air cavity linkage assembly moves in the first air cavity, and transports the gas in the first air cavity to the second air cavity through the ventilation groove, the telescopic air pipe and the through hole. The gas entering the second air cavity 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 cavity pushes open the ventilation assembly, so that the gas enters the airbag through the exhaust groove, inflates and expands the airbag, and seals 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.

[0016] 2. Through the defective product marking mechanism provided by 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 on 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. Thus, the double-P radiation tubes with unqualified airtightness detection can be marked, which is convenient for later screening. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the structural schematic diagram of the airtightness detection mechanism of the present invention; Figure 3 is the cross-sectional structural schematic diagram of the air seat and the insertion seat of the present invention; Figure 4 is Figure 3 the enlarged schematic diagram of the structure of Area A in Figure 5Schematic cross-sectional structure diagram of the socket of the present invention; Figure 6 is Figure 5 the enlarged schematic diagram of the structure of area B in Figure 7 Schematic structure diagram of the position adjustment component of the present invention; Figure 8 Schematic cross-sectional structure diagram of the fixing plate in the position adjustment component of the present invention; Figure 9 Schematic structure diagram of the defective product marking mechanism of the present invention; Figure 10 Schematic structure diagram of the guiding component and the marking component in the defective product marking mechanism of the present invention; Figure 11 Schematic structure diagram of the double-P radiation tube fixing bracket of the present invention.

[0019] [Reference numerals] 1, conveyor; 2, conveying platform; 3, double-P radiation tube fixing bracket; 31, fixing base; 32, first side positioning block; 33, second side positioning block; 34, connecting plate; 35, third side positioning block; 36, threaded sleeve; 37, first guiding sleeve; 38, threaded rod; 39, bearing seat; 310, guiding rod; 311, second guiding sleeve; 4, double-P radiation tube body; 5, airtightness detection mechanism; 51, support frame; 52, first driving member; 53, position adjustment component; 531, fixing plate; 532, opening groove; 533, moving plate; 534, first reset member; 54, air seat; 541, first air chamber; 542, ventilation groove; 543, groove; 55, positioning baffle; 56, socket; 561, second air chamber; 562, through hole; 563, via hole; 564, airbag; 565, exhaust groove; 57, air chamber linkage component; 571, push rod; 572, first piston; 573, second reset member; 58, push adjustment 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 passing hole; 510, telescopic air pipe; 6, defective product marking mechanism; 61, connecting frame; 62, second driving member; 63, fixed U-shaped frame; 64, guiding component; 641, first fixed shaft; 642, rotating U-shaped frame; 643, torsion spring; 644, guiding wheel; 65, marking component; 651, second fixed shaft; 652, pen sleeve; 653, marking pen; 654, locking bolt; 655, inclined plate; 656, arc rod; 657, fourth reset member.

[0020] 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 purposes and is not intended to limit the present invention to this specific structure, device, and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs. Detailed implementation manners

[0021] 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 them. 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.

[0022] Embodiment: As Figures 1 to 11 shown, the embodiment of the present invention provides an airtightness detection device for a double-P radiant tube of an annealing furnace, including 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 bracket 3 is installed on the top of each conveying platform 2. The double-P radiant tube fixing bracket 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 bracket 3 to fix its position, and then the conveying platform 2 is circulated through 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. A position sensor can be used, and the model of the position sensor can be selected according to the layout requirements of the production line. The airtightness detection mechanism 5 detects the airtightness of the double-P radiant tube body 4. When the airtightness of the double-P radiant tube body 4 is 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 bracket 3 and the double-P radiant tube body 4 for conveying, so no more details will be given here.

[0023] 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 arranged. 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 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 rod 310 is fixedly connected to the top of the fixed base 31. 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 stability of clamping and fixing the double-P radiation tube body 4 is greatly improved, avoiding the position deviation of the double-P radiation tube body 4 during the airtightness detection process and affecting the detection effect.

[0024] 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 outer side of one end of the insertion seat 56 close to the air seat 54; 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; 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; Inside the second air chamber 561, there is a push adjustment assembly 58 for cooperating with the position adjustment assembly 53 to adjust the position of the insertion seat 56; On the outer side of the end of the insertion seat 56 away from the air seat 54, an airbag 564 is embedded. 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.

[0025] In the specific implementation process, by 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 adjustment assembly 58 to move. Under the combined action of the push adjustment assembly 58 and the position adjustment 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 settings of the push adjustment assembly 58 and the position adjustment 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.

[0026] 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 air supply device of the airtightness detection device, and a pressure detection device is also provided for detecting the change of the air pressure in the double-P radiation tube body 4, so as to detect the airtightness of the double-P radiation tube.

[0027] In this embodiment, as Figure 3As shown, the air chamber linkage assembly 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 placed in the first air chamber 541 and fixedly connected with a first piston 572. A second reset member 573 is sleeved outside the push rod 571 between the air seat 54 and the positioning baffle 55. The second reset member 573 is preferably a spiral spring. A groove 543 is formed on the outer wall of the air seat 54 at the position corresponding to the second reset member 573. One end of the second reset member 573 is placed in the groove 543. After the connection port outer wall of the positioning baffle 55 contacts the double-P radiation tube body 4, with the continuous action of the first driving member 52, the connection port outer wall of the positioning baffle 55 and the double-P radiation tube body 4 are pressed and abutted, thereby pushing the positioning baffle 55 to move closer to the air seat 54, causing the push rod 571 to push the first piston 572 to move in the first air chamber 541, discharging the gas in the first air chamber 541 into the ventilation groove 542, and then transporting it to the second air chamber 561 through the telescopic air pipe 510. When the airtightness detection is completed, the positioning baffle 55 is separated from the double-P radiation tube body 4, and under the action of the second reset member 573, the positioning baffle 55, the push rod 571, and the first piston 572 are reset for the next detection use.

[0028] In this embodiment, as Figure 4 shown, the pushing and adjusting assembly 58 includes a second piston 581 arranged in the second air chamber 561. A connecting seat 582 is fixedly connected to the side of the second piston 581 away from the air seat 54. A plurality of through holes 563 communicating with the second air chamber 561 are formed along the circumferential direction on the outer wall of the insertion seat 56. A moving column 583 is slidably installed in each through hole 563. A linkage rod 584 is movably hinged between the end of the moving column 583 placed in the second air chamber 561 and the connecting seat 582.

[0029] In this embodiment, as Figure 7 and Figure 8 shown, the position adjustment assembly 53 includes a fixing plate 531 fixedly connected to the output end of the first driving member 52. A cavity is formed on 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 with the moving plate 533. Rollers are rotatably connected to the top and bottom of the moving plate 533. First reset members 534 are fixedly connected between both sides of the moving plate 533 and the inner wall of the cavity. The first reset members 534 are preferably spiral springs. The length of the moving plate 533 is greater than the length of the opening groove 532.

[0030] 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 moving column 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 arranged at the top and bottom of the moving plate 533 to reduce the friction force of the moving plate 533 when moving 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 it is in the non-use state, thereby resetting the insertion seat 56 for the next detection and use.

[0031] 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 structure, 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 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 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 helical 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, so that the sealing block 592 is separated 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.

[0032] 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 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.

[0033] 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. Torsion springs 643 are sleeved outside the first fixed shaft 641 between both sides of the rotating U-shaped frame 642 and the fixed U-shaped frame 63.

[0034] 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 limit 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 limit 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 to the outside of 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 limit rod, so that the pen sleeve 652 and the marking pen 653 are arranged obliquely downward.

[0035] In the specific implementation process, when the airtightness of the double-P radiation tube body 4 fails the airtightness test, 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 to the outside of 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, so that the arc-shaped rod 656 slides guidingly on the inclined plate 655 and compresses 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, so that the guide wheel 644 rolls along the outer wall of the double-P radiation tube body 4 and drives 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, which is convenient for 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.

[0036] In this embodiment, the present invention also provides a method for using an airtightness detection device for a double-P radiation tube of an annealing furnace, including 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, adjusts the position of the two third side positioning blocks 35, and brings the third side positioning blocks 35 closer to the double-P radiation tube body 4, thereby clamping and fixing the double-P radiation tube body 4 to 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; S2. The conveyor 1 works to circulate and convey 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 pushes 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 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 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; S5. Charge the detection gas into the double-P radiation tube body 4 through the air supply equipment and air pipe of the airtightness detection device, and detect the change of the air pressure in the double-P radiation tube body 4 through 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 transfers the next double-P radiation tube body 4 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 downward, driving the guiding assembly 64 and the marking assembly 65 to move downward 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 on 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 upward 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, and drives 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 assembly 64 and the marking assembly 65 to reset. The conveyor 1 continues to work, and transfers the next double-P radiation tube body 4 to the airtightness detection mechanism 5 for detection.

[0037] The above are only the preferred embodiments 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 annealing furnace double P radiant tube air tightness detection device, 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), characterized in that: A double P radiation tube fixing frame (3) is installed on the top of each conveying platform (2), and the double P radiation tube fixing frame (3) is used to fix the double P radiation tube body (4). An air tightness detection mechanism (5) and a defective product marking mechanism (6) are installed on the frame of the conveyor (1); The air tightness detection mechanism (5) comprises a support frame (51) fixedly connected to a frame of a conveyor (1), a first driving member (52) being fixedly mounted on the top of the support frame (51), an output end of the first driving member (52) being connected to a position adjustment component (53), one side of the position adjustment component (53) being connected to an air seat (54), one side of the air seat (54) being connected to an insertion seat (56), and a positioning baffle (55) being fixedly connected to the outer side of one end of the insertion seat (56) close to the air seat (54); A first air cavity (541) having an annular structure is disposed inside the air seat (54), a second air cavity (561) is disposed inside the insertion seat (56), a ventilation groove (542) communicating with the first air cavity (541) is provided at the center of one side of the air seat (54) close to the insertion seat (56), a through hole (562) communicating with the second air cavity (561) is provided at the center of one side of the insertion seat (56) close to the air seat (54), and a telescopic air pipe (510) is fixedly connected between the ventilation groove (542) and the through hole (562); An air cavity linkage assembly (57) is provided between the positioning baffle (55) and the first air cavity (541), and is used to transport the gas in the first air cavity (541) to the second air cavity (561); A push adjustment component (58) is disposed in the second air cavity (561) and is used to cooperate with the position adjustment component (53) to adjust the position of the insertion seat (56); An air bag (564) is embedded and installed on the outer side of one end of the insertion seat (56) away from the air seat (54); the air bag (564) is connected to the second air cavity (561) via an exhaust groove (565); and a ventilation component (59) is arranged in the exhaust groove (565).

2. The device for detecting air tightness of double P radiant tubes in an annealing furnace according to claim 1, characterized in that: The air cavity linkage assembly (57) comprises 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 disposed in the first air cavity (541) and fixedly connected to a 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); 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 disposed in the groove (543).

3. The device for detecting air tightness of double P radiant tubes in an annealing furnace according to claim 1, characterized in that: The push adjustment assembly (58) includes a second piston (581) disposed in the second air cavity (561); a connecting seat (582) is fixedly connected to a side of the second piston (581) away from the air seat (54); a plurality of through holes (563) communicating with the second air cavity (561) are provided on the outer wall of the insertion seat (56) in a circumferential direction; a movable column (583) is slidably installed in each of the through holes (563); and a linkage rod (584) is movably hinged between one end of the movable column (583) disposed in the second air cavity (561) and the connecting seat (582).

4. The device for detecting air tightness of double P radiant tubes in an annealing furnace according to claim 1, characterized in that: The position adjustment component (53) comprises a fixed plate (531) fixedly connected to the output end of the first driving member (52); a cavity is formed on the fixed plate (531); an opening groove (532) communicating with the cavity is formed 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 opening groove (532) and is fixedly connected to the movable plate (533); rollers are rotatably connected to the top and bottom of the movable plate (533); first reset members (534) are fixedly connected between both sides of the movable plate (533) and the inner wall of the cavity; and the length of the movable plate (533) is greater than the length of the opening groove (532).

5. The device for detecting air tightness of double P radiation tubes in an annealing furnace according to claim 1, characterized in that: The ventilation assembly (59) comprises a sealing seat (591) fixedly connected to the inside of the exhaust groove (565), a ventilation hole is provided inside the sealing seat (591), a sealing block (592) is provided in the ventilation hole, the sealing block (592) is a truncated cone structure, the ventilation hole is adapted to the shape of the sealing block (592), one end of the sealing block (592) is fixedly connected to a moving rod (593) passing through the ventilation hole, one end of the moving rod (593) away from the sealing block (592) is fixedly connected to a supporting block (594), the supporting block (594) is slidably installed in the exhaust groove (565), a third reset member (595) is sleeved between the supporting block (594) and the sealing seat (591) and located on the outside of the moving rod (593), and a plurality of ventilation holes (596) are provided on the supporting block (594).

6. The device for detecting air tightness of double P radiation tubes in an annealing furnace according to claim 1, characterized in that: The defective product marking mechanism (6) comprises a connecting frame (61) fixedly connected to a frame of a conveyor (1), a second driving member (62) being fixedly mounted on the connecting frame (61), an output end of the second driving member (62) being fixedly connected to a fixed U-shaped frame (63), and a guide assembly (64) and a marking assembly (65) being arranged in the fixed U-shaped frame (63).

7. The device for detecting air tightness of double P radiation tubes in an annealing furnace according to claim 6, characterized in that: The guide assembly (64) comprises a first fixed shaft (641) fixedly connected to the inside of 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); and torsion springs (643) are sleeved between the two sides of the rotating U-shaped frame (642) and the fixed U-shaped frame (63) and located outside the first fixed shaft (641).

8. The device for detecting air tightness of double P radiation tubes in an annealing furnace according to claim 7, characterized in that: The marking assembly (65) comprises a second fixed shaft (651) fixedly connected to the inside of the rotating U-shaped frame (642); a pen cover (652) is rotatably connected to the second fixed shaft (651); a marking pen (653) is installed in the pen cover (652); a locking bolt (654) for locking the position of the marking pen (653) is connected to the outer wall of the pen cover (652); an inclined plate (655) is fixedly connected to the top of the rotating U-shaped frame (642); an arc rod (656) is fixedly connected to the top of the pen cover (652); the arc rod (656) One end passes through the inclined plate (655) and is fixedly connected to the limiting block; a fourth reset member (657) is sleeved between the pen cover (652) and the inclined plate (655) and is located outside the arc-shaped rod (656); a limiting rod is fixedly connected inside the rotating U-shaped frame (642) and located at the bottom of the pen cover (652); the tip of the marking pen (653) extends to the outside of the guide wheel (644); when the fourth reset member (657) is in the initial state, it pushes the pen cover (652) to abut against the limiting rod, so that the pen cover (652) and the marking pen (653) are arranged to be inclined downward.

9. The device for detecting air tightness of double P radiation tubes in an annealing furnace according to claim 1, characterized in that: The double P radiation tube fixing frame (3) comprises a fixing base (31) fixedly connected to the top of the conveying platform (2), the front and rear ends of the top of the fixing base (31) are fixedly connected to first side positioning blocks (32), the top of one end of the fixing base (31) is fixedly connected to two second side positioning blocks (33), a connecting plate (34) is arranged above the other end of the fixing base (31), the top of the connecting plate (34) is fixedly connected to two third side positioning blocks (35), and a threaded sleeve (36) is fixedly connected to the connecting plate (34), and the threaded sleeve (36) has an inner thread. A threaded rod (38) is connected to the threaded rod (38), the threaded rod (38) is mounted 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 to a handle, a first guide sleeve (37) slidably sleeved on the outside of the threaded sleeve (36) is fixedly connected to the top of the fixed base (31), guide rods (310) are also fixedly connected on both sides of the threaded sleeve (36) on the connecting plate (34), and a second guide sleeve (311) slidably sleeved on the outside of the guide rod (310) is also fixedly connected to the top of the fixed base (31).

10. A method for using the air tightness detection device for double P radiation tubes in an annealing furnace according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, placing the double P radiant tube body (4) on the two first side positioning blocks (32) and the two second side positioning blocks (33) for preliminary positioning, then rotating the threaded rod (38) by means of a handle so that the threaded rod (38) is screwed into the threaded sleeve (36), adjusting the position of the threaded sleeve (36), so that the threaded sleeve (36) drives the connecting plate (34) to move, adjusting the position of the two third side positioning blocks (35), and bringing the third side positioning blocks (35) close to the double P radiant tube body (4), thereby clamping and fixing the double P radiant tube body (4), and completing the installation of the double P radiant tube body (4) on the double P radiant tube fixing frame (3) of the conveying platform (2); S2, the conveyor (1) operates to circulate the conveying platform (2) so that the double P radiant tube body (4) reaches the position of the air tightness detection mechanism (5) and the defective product marking mechanism (6), the conveyor (1) stops working, and the air tightness detection mechanism (5) performs an air tightness detection on the double P radiant tube body (4); S3. The first driving member (52) in the airtightness detection mechanism (5) operates to push the gas seat (54), the insertion seat (56) and the positioning baffle (55) to move in the direction of 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 operate, the positioning baffle (55) and the insertion seat (56) are pushed toward the gas seat (54). At this time, the push rod (571) pushes the first piston (572) to move in the first gas cavity (541), discharges the gas in the first gas cavity (541) into the ventilation groove (542), and then transports the gas to the second gas cavity through the telescopic gas pipe (510). (561), the gas entering the second gas 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 in the through hole (563) to extend outside the insertion seat (56), so that the plurality of moving columns (583) contact the inner wall of the connecting port of the double P radiation tube body (4), and push the gas 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 connecting port of the double P radiation tube body (4), and the second piston (581) stops moving, and the insertion seat (56) is adjusted to the center position; S4. After the position of the movable 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) toward the outside of the sealing seat (591) through the air hole (596) on the support block (594), so that the sealing block (592) is separated from the sealing seat (591). The third reset member (595) contracts, and the gas enters the air bag (564), which expands the air bag (564) to seal the connection port of the double P radiation tube body (4); S5, filling the double P radiation tube body (4) with a detection gas through the gas supply device and the gas pipe of the gas tightness detection device, detecting the change of the gas pressure in the double P radiation tube body (4) through the pressure detection device, thereby detecting the gas tightness of the double P radiation tube; S6. When the air tightness of the double P radiant tube body (4) is qualified, the first driving member (52) is reset, driving the air seat (54), the insertion seat (56) and the positioning baffle (55) to reset, and the conveyor (1) continues to work to transfer the next double P radiant tube body (4) to the air tightness detection mechanism (5) for detection; S7. When the air tightness of the double P radiation tube body (4) is unqualified, the first driving member (52) is reset, driving the air seat (54), the insertion seat (56) and the positioning baffle (55) to reset, and then the second driving member (62) drives the fixed U-shaped frame (63) to move downward, driving the guide assembly (64) and the marking assembly (65) to move downward synchronously, so that the tip of the marking pen (653) first contacts the double P radiation tube body (4), and as the second driving member (62) continues to work, the guide wheel (644) contacts the double P radiation tube body (4), and 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), and then passes The second driving member (62) continues to work, and under the guidance of the guide wheel (644), the rotating U-shaped frame (642) rotates upward on the first fixed shaft (641), so that the guide wheel (644) rolls along the outer wall of the double P radiation tube body (4), and drives the marking pen (653) to move on the outer wall of the double P radiation tube body (4) to mark the double P radiation tubes that fail the air tightness test, thereby facilitating later screening. Then, the second driving member (62) is reset, driving the guide assembly (64) and the marking assembly (65) to reset, and the conveyor (1) continues to work, and the next double P radiation tube body (4) is transferred to the air tightness detection mechanism (5) for testing.

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