Optical Methane Gas Sensor Encapsulation Structure and Its Special Encapsulation Equipment

Abstract

The present invention discloses an optical methane gas sensor packaging structure and its dedicated packaging equipment, relating to the technical field of sensor packaging. The packaging structure includes a cover body and a base. The cover body includes a housing and a cap body. The cap body is arranged on the top of the housing. Air holes are evenly formed on the top surface of the cap body. The base is correspondingly matched with the inner bottom of the housing. First fitting grooves and second fitting grooves are respectively formed on both sides of the inner top surface of the housing. Fitting holes are formed in both the first fitting groove and the second fitting groove. A groove communicating with the fitting holes is formed on the top surface of the housing. The present invention improves the air guiding effect of the sensor housing, prevents external impurities from entering the interior of the housing, protects the cleanliness of the optical path in the cavity, and improves the detection accuracy. In addition, the deformed sensor housing can be detected in time to protect the base and its components. Moreover, the components on the base can be cleaned, and at the same time, the permeability of the detection holes on the housing can be detected, and the detection holes can be cleaned in time when they are blocked.

Description

Technical Field

[0001] The present invention relates to the technical field of sensor packaging, and specifically to an optical methane gas sensor packaging structure and its dedicated packaging equipment. Background Art

[0002] A gas sensor is a key detection device that can convert the specific type and concentration information in a gas into an electrical signal that is easy to receive and process. Gas sensor packaging technology aims to integrate a gas-sensitive element and its related circuits in a sealed package to protect the sensor from external environmental interference and improve its stability and reliability.

[0003] Chinese Patent with application number 2021210099146 discloses a packaging structure for a MEMS gas sensor chip, including a base. In the middle of the top end of the base, a sensor chip is provided. At the bottom end of the base, a number of pins are provided. Between the top end of the base and the top end of the sensor chip, they are connected by a gold wire. Among them, around the top end of the base, a rubber limit ring is fixedly provided. Above the rubber limit ring, a sealing cap is provided. At the top end of the sealing cap, an air pipe is provided. Inside the circumference of the air pipe, a number of telescopic components are provided. At the middle and top of the air pipe, a breathable film and a filter screen are respectively provided. On both sides of the top end of the sealing cap, air holes are opened.

[0004] Chinese Patent with application number 2020108812883 discloses a packaging device and a packaging method for sensor production, belonging to the technical field of packaging equipment. A packaging device for sensor production includes a box body. At the lower end inside the box body, a support block is fixedly connected. On one side of the support block, a first motor is fixedly connected. The output end of the first motor is fixedly connected with a first rotating rod. At the end of the first rotating rod far from the first motor, a first clamping plate is fixedly connected. On the other side of the support block, a first telescopic column is fixedly connected.

[0005] However, the air guiding effect of the sensor housing after packaging is poor, and external impurities are easily introduced into the sensor interior, affecting the detection effect. Moreover, during the processing and transportation of the sensor housing, it is prone to deformation, resulting in damage to the sensor components during packaging. Also, after long-term use, there will be a skew between the housing and the base, affecting the packaging accuracy. In addition, during the processing, transportation, and storage of the sensor housing, external impurities will enter the detection holes, causing the detection holes to be blocked and affecting the monitoring accuracy. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the existing defects, and provide an optical methane gas sensor packaging structure and its special packaging equipment, which improve the air guiding effect of the sensor housing, effectively prevent the entry of external impurities, improve the detection accuracy, and can timely detect the deformed sensor housing, effectively prevent the packaging of the deformed sensor housing and the base, protect the base and its components. In addition, it can clean the components on the base, simultaneously detect the permeability of the detection holes on the housing, and clean them in time when the detection holes are blocked, which can effectively solve the problems in the background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] On the one hand, the present invention provides an optical methane gas sensor packaging structure, including a cover body and a base. The cover body includes a housing and a cap body, and the cap body is arranged on the top of the housing;

[0009] The top surface of the cap body is evenly provided with air holes;

[0010] The base is correspondingly matched with the inner bottom of the housing.

[0011] Further, on both sides of the top surface inside the housing, a first fitting groove and a second fitting groove are respectively provided. Fitting holes are provided in both the first fitting groove and the second fitting groove. A groove communicating with the fitting holes is provided on the top surface of the housing. The fitting holes and the air holes together form the inner cavity optical path of the cover body;

[0012] The cap body is a hollow structure and its bottom is transparent. A flange is provided on the bottom surface of the cap body, and the flange is fixedly connected with the inner surface of the groove;

[0013] A pin is provided through the middle of the base, and a detection module is provided on the top of the pin. The components in the detection module are correspondingly matched with the first fitting groove and the second fitting groove.

[0014] On the other hand, the present invention also provides a special packaging equipment, which uses the above-mentioned optical methane gas sensor packaging structure to realize the packaging of the sensor. It includes a pressing unit. The pressing unit includes a machine base. One side of the top of the machine base is provided with a support arm. A pressing cylinder is provided through the top of the support arm. The bottom telescopic end of the pressing cylinder is provided with a pressing rod, and the pressing rod is a hollow structure;

[0015] A nozzle is provided on the bottom surface of the pressing rod, a barometric pressure sensor is provided inside the pressing rod, and a pressure sensor is provided between the top of the pressing rod and the telescopic end of the pressing cylinder;

[0016] A feeding unit is provided on the top of the machine base, and a positioning unit for limiting the base is provided on the feeding unit;

[0017] A transfer unit for transferring the cover body is provided in the middle of the support arm, and a clamping unit for clamping the cover body is provided on the transfer unit;

[0018] The feeding unit includes an air pump and a slide rail provided on the top of the machine base. The output end of the air pump is communicated with the side surface of the pressing rod through an air pipe.

[0019] Preferably, the pressing unit further includes a belt conveyor module for conveying the cover body. The belt conveyor module is provided at the inner bottom of the support arm, and a guide seat is provided on the top of the machine base.

[0020] Preferably, a lead screw is rotatably connected inside the slide rail, a slide seat is slidably connected inside the slide rail, the bottom of the slide seat is threadedly connected with the lead screw, a belt drive mechanism for driving the lead screw to rotate is provided on one side of the machine base, and the air pump is provided on the side surface of the slide rail.

[0021] Preferably, the positioning unit includes a support and an electromagnetic plug. The supports are equidistantly provided on the top of the slide seat. A rotary cylinder is provided on the top of the support. A ring seat is provided on the top output shaft of the rotary cylinder. Embedding grooves are evenly opened on the top surface of the ring seat. The electromagnetic plug is provided in the embedding groove. An elastic telescopic rod is vertically provided at the end of the plug rod of the electromagnetic plug, and an arc-shaped block is horizontally provided at the top telescopic end of the elastic telescopic rod.

[0022] Preferably, the transfer unit includes a limit groove and a transfer cylinder. The limit groove is opened on the side surface of the support arm. A slider is slidably connected in the limit groove. A mounting seat is rotatably connected to the side surface of the slider. The transfer cylinder is provided on the side surface of the mounting seat. A lifting cylinder is provided between the bottom surface of the limit groove and the slider;

[0023] A connecting plate is provided on the end side surface of the mounting seat, and an electric telescopic rod is movably provided on the side surface of the slider. The telescopic end of the electric telescopic rod is movably connected with the connecting plate.

[0024] Preferably, the clamping unit includes a connecting seat. The connecting seat is provided at the telescopic end of the transfer cylinder. A frame seat is rotatably connected inside the connecting seat through a rotating shaft. Movable seats are symmetrically slidably connected to both sides inside the frame seat. Clamping blocks are symmetrically provided between the ends of the movable seats. An arc-shaped groove that fits the side surface of the cover body is opened on the inner side of the clamping block;

[0025] An adjusting motor is provided on the side surface of the connecting seat. The output shaft of the adjusting motor is fixedly connected to the end of the rotating shaft.

[0026] Preferably, a bidirectional screw is rotatably connected inside the frame seat. The two sides of the bidirectional screw are respectively threadedly connected with the movable seats on both sides. A driving motor is provided at the end of the frame seat. The output shaft of the driving motor is fixedly connected to the bidirectional screw;

[0027] A tipping motor is provided between the telescopic end of the transfer cylinder and the connecting seat, and the output shaft of the tipping motor is fixedly connected to the connecting seat.

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] 1. After moving the cover body above the base, the tipping motor is started to adjust the cover body to face upward, and then the pressing cylinder is used to drive the pressing rod to extend into the cover body. When the pressure sensor detects that the pressure value is greater than the set threshold, it is determined that the cover body is deformed. At this time, the pressing rod is moved away from the cover body, the cover body is moved above the feeding seat, the clamping block releases the cover body, and the cover body falls on the feeding seat and is discharged to the outside along the inclined plane of the feeding seat, realizing the sorting of the deformed cover body.

[0030] 2. Before the cover body is transferred above the base corresponding to the position of the pressing rod, the air pump is used to introduce gas into the pressing rod, and the gas is discharged to the base through the air nozzle. At the same time, the pressing rod moves up and down reciprocally, so that the pressing rod intermittently approaches the base to generate an air flow with air pressure fluctuations, improving the cleaning effect, and the rotating cylinder is used to drive the annular seat to drive the base to rotate, realizing the thorough cleaning of the base and completely removing the attached impurities.

[0031] 3. The present invention adjusts the cover body to face upward, makes the pressing rod extend into the cover body, supplies gas to the inside of the pressing rod by using the air pump, the gas enters the cover body through the air nozzle. When the air pressure value in the pressing rod is greater than the set air pressure threshold, the pressing rod is separated from the cover body, and the air pump supplies gas to the pressing rod intermittently. The fluctuating air flow discharged from the air nozzle clears the air holes through the matching holes, and the tipping motor is used to drive the connecting seat to rotate 180° forward and backward, blowing air to both ends of the cover body in turn, further improving the cleaning effect of the blocked impurities in the air holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the packaging structure of the present invention;

[0033] Figure 2 It is a schematic diagram of the split structure of the packaging structure of the present invention;

[0034] Figure 3 It is a schematic diagram of the internal structure of the packaging structure of the present invention.

[0035] Figure 4 It is a schematic diagram of the structure of the present invention;

[0036] Figure 5 It is a schematic diagram of the structure of the present invention from another angle;

[0037] Figure 6 It is an axonometric structure schematic diagram of the present invention;

[0038] Figure 7Schematic diagram of the positioning unit structure of the present invention;

[0039] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure at position A in the present invention;

[0040] Figure 9 Schematic diagram of the clamping unit structure of the present invention.

[0041] In the figure: 1. Cover body; 101. Housing; 102. Cap body; 103. First mating groove; 104. Second mating groove; 105. Mating hole; 106. Air hole; 107. Base; 108. Pin; 2. Pressing unit; 201. Machine base; 202. Support arm; 203. Pressing cylinder; 204. Pressing rod; 205. Belt conveyor module; 206. Feeding seat; 3. Feeding unit; 301. Slide rail; 302. Lead screw; 303. Slide block; 304. Belt drive mechanism; 305. Air pump; 306. Air pipe; 4. Positioning unit; 401. Support; 402. Rotary cylinder; 403. Ring seat; 404. Embedded groove; 405. Electromagnetic plug; 406. Elastic telescopic rod; 407. Arc-shaped block; 5. Transfer unit; 501. Limiting groove; 502. Slide block; 503. Mounting seat; 504. Transfer cylinder; 505. Electric telescopic rod; 506. Lifting cylinder; 6. Clamping unit; 601. Reversing motor; 602. Connecting seat; 603. Frame seat; 604. Adjusting motor; 605. Movable seat; 606. Clamping block; 607. Driving motor; 608. Bi-directional screw. Specific embodiments

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all 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 shall fall within the protection scope of the present invention.

[0043] First embodiment

[0044] Please refer to Figures 1-3, this embodiment provides an optical methane gas sensor packaging structure, including a cover body 1 and a base 107. The cover body 1 includes a housing 101 and a cap 102. The cap 102 is arranged on the top of the housing 101. The housing 101 and the cap 102 are of a split structure during production and processing. In the packaging process, the housing 101 and the cap 102 are fixed by welding or adhesive bonding. On both sides of the inner top surface of the housing 101, a first fitting groove 103 and a second fitting groove 104 are respectively opened. The first fitting groove 103 and the second fitting groove 104 are respectively adapted to the detection module components. Fitting holes 105 are opened in both the first fitting groove 103 and the second fitting groove 104. The fitting holes 105 are used for the gas to converge and contact with the detection module, so as to facilitate the detection of the incoming gas.

[0045] A groove communicating with the fitting hole 105 is opened on the top surface of the housing 101. The cap 102 is of a hollow structure and its bottom is transparent. A flange is provided on the bottom surface of the cap 102. The flange is fixedly connected to the inner surface of the groove, that is, the flange and the inner surface of the groove are fixed by adhesive bonding or welding. Air holes 106 are evenly opened on the top surface of the cap 102. The air holes 106 are used to filter external impurities and prevent the impurities from entering the cap 102 and the housing 101 to interfere with the detection. The fitting holes 105 and the air holes 106 together form the inner cavity optical path of the cover body.

[0046] The base 107 corresponds to and cooperates with the inner bottom of the housing 101. After the base 107 and the inner bottom of the housing 101 are fully mated, the bottom surface of the base 107 is flush with the bottom end surface of the housing 101. A lead 108 is provided through the middle of the base 107. A detection module is provided at the top of the lead 108. The components in the detection module are correspondingly combined with the first fitting groove 103 and the second fitting groove 104 to form the cover body 1. After the top of the housing 101 and the bottom of the cap 102 are fixedly connected together to form the cover body 1, the base 107 is press-fitted and packaged with the inner bottom side of the housing 101. After the press-fitting and packaging is completed, it is immersed in an external glue solution for sealing glue, so as to fix and seal between the base 107 and the inner bottom side of the housing 101.

[0047] Second Embodiment

[0048] Please refer to Figures 4-9, this embodiment provides a special encapsulation device. This encapsulation device uses the optical methane gas sensor encapsulation structure in the second embodiment to encapsulate the sensor, including a pressing unit 2. The pressing unit 2 includes a base 201. On one side of the top of the base 201, there is a support arm 202. A pressing cylinder 203 penetrates through the top of the support arm 202. The bottom telescopic end of the pressing cylinder 203 is provided with a pressing rod 204. When the bottom end of the pressing rod 204 corresponds to the top of the fed cover 1 and the cover 1 corresponds to the position of the base 107, the elongation of the telescopic end of the pressing cylinder 203 is used to drive the pressing rod 204 to move downward, and the cover 1 is buckled outside the base 107.

[0049] The pressing unit 2 further includes a belt transmission module 205 for transporting the cover 1. The belt transmission module 205 is arranged at the inner bottom of the support arm 202. The belt transmission module 205 adopts a belt transmission mechanism in the prior art and is used to realize the feeding of the cover 1.

[0050] On the top of the base 201, there is a feeding unit 3. The feeding unit 3 is provided with a positioning unit 4 for limiting the base 107. The feeding unit 3 drives the positioning unit 4 to move horizontally and intermittently in a straight line, realizing the individual feeding of the base 107, so that the base 107 in each positioning unit 4 moves to the position corresponding to the pressing rod 204 in turn.

[0051] In the middle of the support arm 202, there is a transfer unit 5 for transferring the cover 1. The transfer unit 5 is provided with a clamping unit 6 for clamping the cover 1. After the clamping unit 6 clamps the cover 1 on the belt transmission module 205, the transfer unit 5 is used to drive the clamping unit 6 to swing 90 degrees to the vicinity of the positioning unit 4, realizing the transfer of the cover 1.

[0052] The feeding unit 3 includes a slide rail 301 arranged on the top of the base 201. A lead screw 302 is rotatably connected inside the slide rail 301. A slide seat 303 is slidably connected inside the slide rail 301. The bottom of the slide seat 303 is threadedly connected to the lead screw 302. On one side of the base 201, there is a belt transmission mechanism 304 for driving the lead screw 302 to rotate. The belt transmission mechanism 304 is preferably a belt transmission mechanism in the prior art. The belt transmission mechanism 304 drives the lead screw 302 to rotate intermittently, realizing the intermittent linear sliding of the slide seat 303, and further driving the positioning unit 4 to slide horizontally and intermittently in a straight line, realizing the individual feeding of the base 107.

[0053] The positioning unit 4 includes a support 401 and an electromagnetic plug 405. The supports 401 are arranged at equal intervals on the top of the slide seat 303. A rotary cylinder 402 is arranged on the top of the support 401. The top output shaft of the rotary cylinder 402 is provided with an annular seat 403. The rotary cylinder 402 is used to drive the annular seat 403 to rotate to realize the rotation of the base 107.

[0054] The top surface of the annular seat 403 is evenly provided with embedding grooves 404. The electromagnetic plug 405 is arranged in the embedding groove 404. The end of the pin rod of the electromagnetic plug 405 is vertically provided with an elastic telescopic rod 406. The top telescopic end of the elastic telescopic rod 406 is horizontally provided with an arc-shaped block 407. The pin rods of the electromagnetic plugs 405 drive the elastic telescopic rods 406 to close together, and then the arc-shaped block 407 can be used to abut against the side surface of the base 107 for limiting. The elastic telescopic rod 406 enables the arc-shaped block 407 to perform elastic expansion and contraction in the vertical direction, so that the bottom surface of the housing 101 is pressed down to be flush with the bottom surface of the base 107, and the arc-shaped block 407 still effectively positions the base 107 during the process of being pressed downwards.

[0055] The transfer unit 5 includes a limit groove 501 and a transfer air cylinder 504. The limit groove 501 is opened on the side surface of the support arm 202. A slider 502 is slidably connected in the limit groove 501. A mounting seat 503 is rotatably connected to the side surface of the slider 502. The transfer air cylinder 504 is arranged on the side surface of the mounting seat 503. A lifting air cylinder 506 is arranged between the bottom surface of the limit groove 501 and the slider 502. A connecting plate is arranged on the end side surface of the mounting seat 503. An electric telescopic rod 505 is movably arranged on the side surface of the slider 502. The telescopic end of the electric telescopic rod 505 is movably connected to the connecting plate. By using the expansion and contraction of the electric telescopic rod 505 to drive the mounting seat 503 to rotate through the connecting plate, the transfer air cylinder 504 can be rotated between the vertical state and the horizontal state, so as to transfer the cover 1 on the belt transmission module 205 to a position close to the positioning unit 4. The lifting air cylinder 506 is used to realize the lifting of the clamping unit 6.

[0056] The clamping unit 6 includes a connecting seat 602. The connecting seat 602 is arranged at the telescopic end of the transfer air cylinder 504. A frame seat 603 is rotatably connected in the connecting seat 602 through a rotating shaft. Two movable seats 605 are symmetrically and slidably connected to both sides inside the frame seat 603. Clamping blocks 606 are symmetrically arranged between the ends of the movable seats 605. Arc-shaped grooves that fit the side surface of the cover 1 are opened on the inner sides of the clamping blocks 606. Rubber pads are arranged in the arc-shaped grooves to protect the outer circumferential surface of the cover 1. A bidirectional screw rod 608 is rotatably connected in the frame seat 603. The two sides of the bidirectional screw rod 608 are respectively threadedly connected to the two movable seats 605 on both sides. A driving motor 607 is arranged at the end of the frame seat 603. The output shaft of the driving motor 607 is fixedly connected to the bidirectional screw rod 608. The driving motor 607 drives the bidirectional screw rod 608 to rotate. The bidirectional screw rod 608 uses the threads with opposite spiral directions on both sides to realize the opposite movement of the two movable seats 605 on both sides, and then the cover 1 can be clamped by the clamping blocks 606 on both sides. The radius of the arc-shaped groove is the same as the radius of the cover 1.

[0057] The transfer air cylinder 504 is initially in the vertical state, and the movable seat 605 and the clamping block 606 are both perpendicular to the transfer air cylinder 504 in the initial state.

[0058] The side of the connecting seat 602 is provided with an adjusting motor 604. The output shaft of the adjusting motor 604 is fixedly connected to the end of the rotating shaft. The adjusting motor 604 drives the frame seat 603 to rotate through the rotating shaft to adjust the position and angle of the clamping block 606.

[0059] During use, the cover 1 is placed on the conveyor belt of the belt conveyor module 205 at equal intervals. The base 107 is placed on the top of the annular seat 403, and the pin 108 on the bottom side of the middle of the base 107 corresponds to the central hole of the annular seat 403. Start the belt conveyor module 205 to make the belt conveyor module 205 run intermittently to drive the cover 1 to be conveyed intermittently. When the cover 1 stops, it just corresponds to the clamping block 606 in the horizontal state. At the same time, start the belt drive mechanism 304 to drive the lead screw 302 to rotate intermittently, so as to realize the intermittent feeding of the base 107 through the intermittent sliding of the sliding seat 303, and it is synchronized with the intermittent conveying of the cover 1, that is, the conveying of the base 107 and the cover 1 starts and stops synchronously, and when the base 107 stops, it just corresponds to the position of the pressing rod 204.

[0060] When both the cover 1 and the base 107 are in a stationary state, start the transfer cylinder 504 to extend and drive the clamping block 606 in the horizontal state to move downward, so that the clamping blocks 606 on both sides are respectively located on both sides of the cover 1. Secondly, start the driving motor 607 to make the clamping blocks 606 on both sides close to clamp the cover 1. Then use the contraction of the transfer cylinder 504 to make the cover 1 move upward, and start the electric telescopic rod 505 to drive the mounting seat 503 to rotate 90 degrees, so that the transfer cylinder 504 rotates to the horizontal state. During this process, use the adjusting motor 604 to drive the frame seat 603 to rotate, so that the central axis of the transfer cylinder 504 coincides with the central axis of the frame seat 603. At the same time, make the transfer cylinder 504 extend, so that the cover 1 moves horizontally to a position corresponding to the lower base 107, as Figure 6 shown. Then start the lifting cylinder 506 to drive the slider 502 to move downward, so that the bottom opening of the cover 1 approaches the top surface of the base 107. Then use the slight reverse rotation of the driving motor 607 to reduce the clamping force of the clamping block 606 on the cover 1. Finally, start the pressing cylinder 203 to drive the pressing rod 204 to move downward to apply a downward pressure on the cover 1, so as to realize the downward movement of the cover 1 to buckle on the outside of the base 107, complete the combination between the cover 1 and the base 107, that is, realize the encapsulation of the gas sensor. When the cover 1 moves downward, it presses the arc-shaped block 407 to move downward under the action of the elastic telescopic rod 406 until the bottom surface of the cover 1 abuts against the top surface of the annular seat 403. At this time, the top surface of the arc-shaped block 407 is flush with the top surface of the annular seat 403.

[0061] After the cover body 1 and the base 107 are buckled, the transfer unit 5 and the clamping unit 6 are restored to the initial state, and the belt transmission module 205 and the belt transmission mechanism 304 are started synchronously, so that the subsequent buckled cover body 1 and base 107 continue to be fed and transported.

[0062] However, during the processing, storage and transportation of the cover body 1, the cover body 1 is prone to deformation, resulting in difficulty in buckling the cover body 1 with the base 107. Moreover, when the deformed cover body 1 is buckled with the base 107 under the pressure of the pressing rod 204, the base 107 and the detection module thereon will be damaged. Therefore, the following improvements are made:

[0063] A turnover motor 601 is provided between the telescopic end of the transfer cylinder 504 and the connecting seat 602. The output shaft of the turnover motor 601 is fixedly connected to the connecting seat 602. The turnover motor 601 is used to drive the connecting seat 602 to rotate around the axis of the transfer cylinder 504 to realize a 180-degree turnover of the clamping unit 6.

[0064] A pressure sensor is provided between the top of the pressing rod 204 and the telescopic end of the pressing cylinder 203. The pressure sensor is used to detect the magnitude of the reverse acting pressure from the cover body 1 received by the pressing rod 204. The outer circumferential radius of the pressing rod 204 is the same as the inner circumferential radius of the housing 101.

[0065] A material guiding seat 206 is provided at the top of the machine base 201 for discharging the deformed cover body 1.

[0066] During use, after the transfer unit 5 rotates the cover body 1 by 90 degrees above the base 107, the turnover motor 601 is started. The turnover motor 601 is used to drive the connecting seat 602 to turnover by 180 degrees, so that the opening of the cover body 1 faces upward. At this time, the opening of the cover body 1 corresponds to the position of the pressing rod 204. Secondly, the pressing cylinder 203 is started to drive the pressing rod 204 to move downward, so that the pressing rod 204 extends into the interior of the cover body 1, and the outer circumferential surface of the pressing rod 204 is attached to the inner circumferential surface of the cover body 1.

[0067] When the cover 1 deforms, the end of the pressure rod 204 cannot match the inner side of the cover 1, which will cause the pressure rod 204 to be unable to extend into the cover 1 normally. Furthermore, when the pressure rod 204 extends into the interior of the cover 1, resistance will be generated on the pressure rod 204, resulting in an increase in the force exerted by the pressure rod 204 on the pressure sensor. When the pressure sensor detects that its own pressure value is greater than the set pressure threshold, it will actively determine that the cover 1 has deformed. At this time, the pressing cylinder 203 contracts to drive the pressure rod 204 away from the cover 1, then the transfer cylinder 504 contracts to drive the cover 1 to move above the material guiding seat 206, and then the driving motor 607 rotates in the reverse direction to make the clamping blocks 606 on both sides move away from each other, so that the cover 1 disengages and falls onto the material guiding seat 206, and is discharged to the outside along the inclined surface of the material guiding seat 206. Then, the belt conveying module 205 is started to drive the cover 1 to continue conveying, and the transfer unit 5 and the clamping unit 6 are used to clamp the next cover 1 and perform snap-fitting and encapsulation with the base 107.

[0068] In addition, during the transfer and storage of the base 107, dust and impurities are likely to adhere to the detection module on the base 107, affecting the normal detection of gas. Therefore, the following improvements are made:

[0069] The pressure rod 204 is of a hollow structure, and an air nozzle is provided on the bottom surface of the pressure rod 204.

[0070] The feeding unit 3 further includes an air pump 305. The air pump 305 is arranged on the side of the slide rail 301. The output end of the air pump 305 is communicated with the side surface of the pressure rod 204 through an air pipe 306. The high-pressure gas generated by the air pump 305 is input into the pressure rod 204 through the air pipe 306 and discharged from the air nozzle at the bottom of the pressure rod 204.

[0071] During use, when the base 107 is conveyed to the position corresponding to the pressure rod 204 and the cover 1 has not been transferred above the base 107, at this time, the pressure rod 204 corresponds to the position of the base 107. The air pump 305 is started, and high-pressure gas is supplied into the pressure rod 204 through the air pipe 306. The high-pressure gas is discharged towards the base 107 through the air nozzle to clean the impurities on the top of the base 107.

[0072] In order to make the cleaning more comprehensive and thorough, while the high-pressure gas is discharged, the pressing cylinder 203 is used to drive the pressure rod 204 to move up and down, so that the pressure rod 204 intermittently approaches the base 107, and the fluctuating air flow is used to clean the base 107. The rotating cylinder 402 is started to drive the annular seat 403 to rotate forward and backward to drive the base 107 to rotate, so as to clean the components on the base 107, completely remove the attached impurities, and use the rotation of the base 107 to throw out the cleaned impurities. Moreover, the maximum gas pressure received by the base 107 is not sufficient to damage the components on the base 107.

[0073] In addition, during the transportation and storage processes, the air holes 106 inside the cover body 1 are prone to being blocked by impurities, which will affect the air permeability of the cover body 1 and cause large errors in detection. To solve the above problems:

[0074] An air pressure sensor is provided inside the pressure rod 204, and the air pressure sensor is used to monitor the gas pressure value inside the pressure rod 204.

[0075] During use, after the base 107 is cleaned, the cover body 1 is transported to the corresponding position above the base 107, and it is detected whether the cover body 1 is deformed according to the above detection method. After the detection is completed, the opening of the cover body 1 is kept upward, and the state of the pressure rod 204 extending into the cover body 1 remains unchanged. The air pump 305 is started to supply air into the pressure rod 204, and air is supplied into the cover body 1 through the air nozzle, and the air pressure value inside the pressure rod 204 is monitored by using the air pressure sensor. When the air holes 106 on the cover body 1 are blocked, it will affect the fluidity of the gas inside the cover body 1, resulting in an increase in the air pressure value inside the pressure rod 204. Therefore, when the pressure sensor detects that the air pressure value inside the pressure rod 204 is greater than the set air pressure threshold value, it is actively determined that the air holes 106 are blocked. At this time, the pressure rod 204 is separated from the cover body 1 by the contraction of the pressing cylinder 203, and the air pump 305 is used to intermittently supply air into the pressure rod 204. The fluctuating air flow discharged from the air nozzle blows towards the inside of the cover body 1, and the fluctuating air flow reaches the air holes 106 through the matching holes 105 to clear the blockage of the air holes 106. At the same time, the flipping motor 601 rotates reciprocally 180 degrees forward and backward, so that the opening of the cover body 1 and the end of the cap body 102 are sequentially corresponding to the pressure rod 204, realizing blowing air at both ends of the cover body 1. When the cap body 102 corresponds to the pressure rod 204, the fluctuating air flow directly acts inside the air holes 106, further improving the cleaning effect of the blocked impurities inside the air holes 106, and at the same time removing the impurities attached to the inner wall of the cover body 1. After the blockage of the air holes 106 is cleared, the cover body 1 is adjusted to have the opening facing downward and then continue with the encapsulation.

[0076] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural or equivalent process transformations made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are similarly included in the patent protection scope of the present invention.

Claims

1. A special packaging device for an optical methane gas sensor, comprising a cover body (1) and a pressing unit (2), characterized in that, The pressing unit (2) includes a machine base (201). On one side of the top of the machine base (201), there is a support arm (202). The top of the support arm (202) is penetrated by a pressing cylinder (203). The bottom telescopic end of the pressing cylinder (203) is provided with a pressing rod (204), and the pressing rod (204) is of a hollow structure; The bottom surface of the pressing rod (204) is provided with an air nozzle. The inside of the pressing rod (204) is provided with a barometric pressure sensor. Between the top of the pressing rod (204) and the telescopic end of the pressing cylinder (203), there is a pressure sensor; On the top of the machine base (201), there is a feeding unit (3). On the feeding unit (3), there is a positioning unit (4) for limiting the base (107); In the middle of the support arm (202), there is a transfer unit (5) for transferring the cover body (1). On the transfer unit (5), there is a clamping unit (6) for clamping the cover body (1); The feeding unit (3) includes an air pump (305) and a slide rail (301) arranged on the top of the machine base (201). The output end of the air pump (305) is communicated with the side surface of the pressing rod (204) through an air pipe (306); The positioning unit (4) includes a support (401) and an electromagnetic plug (405). On the top of the support (401), there is a rotary cylinder (402). The top output shaft of the rotary cylinder (402) is provided with an annular seat (403). Embedding grooves (404) are evenly opened on the top surface of the annular seat (403). The electromagnetic plug (405) is arranged in the embedding groove (404). The end of the pin rod of the electromagnetic plug (405) is vertically provided with an elastic telescopic rod (406). The top telescopic end of the elastic telescopic rod (406) is horizontally provided with an arc-shaped block (407).

2. The dedicated encapsulation device according to claim 1, characterized in that: The pressing unit (2) further includes a belt conveyor module (205) for conveying the cover body (1). The belt conveyor module (205) is arranged at the inner bottom of the support arm (202). On the top of the machine base (201), there is a material guiding seat (206).

3. The dedicated encapsulation device according to claim 1, characterized in that: Inside the slide rail (301), there is a lead screw (302) rotatably connected. Inside the slide rail (301), there is a slide block (303) slidably connected. The bottom of the slide block (303) is threadedly connected with the lead screw (302). On one side of the machine base (201), there is a belt transmission mechanism (304) for driving the lead screw (302) to rotate; The air pump (305) is arranged on the side surface of the slide rail (301).

4. The dedicated encapsulation device according to claim 3, wherein: The supports (401) are arranged at equal intervals on the top of the slide block (303).

5. The dedicated packaging device according to claim 1, characterized in that: The transfer unit (5) includes a limiting groove (501) and a transfer cylinder (504). The limiting groove (501) is opened on the side surface of the support arm (202). Inside the limiting groove (501), there is a slider (502) slidably connected. The side surface of the slider (502) is rotatably connected with a mounting seat (503). The transfer cylinder (504) is arranged on the side surface of the mounting seat (503). Between the bottom surface of the limiting groove (501) and the slider (502), there is a lifting cylinder (506); A connecting plate is provided on the end side of the mounting base (503). An electric telescopic rod (505) is movably provided on the side of the slider (502), and the telescopic end of the electric telescopic rod (505) is movably connected to the connecting plate.

6. The dedicated encapsulation device according to claim 5, wherein: The clamping unit (6) includes a connecting seat (602). The connecting seat (602) is provided at the telescopic end of the transfer cylinder (504). A frame seat (603) is rotatably connected inside the connecting seat (602) through a rotating shaft. Two movable seats (605) are symmetrically and slidably connected to both sides inside the frame seat (603). Clamping blocks (606) are symmetrically provided between the ends of the movable seats (605). An arc groove that fits the side of the cover body (1) is provided on the inner side of the clamping blocks (606); An adjustment motor (604) is provided on the side of the connecting seat (602), and the output shaft of the adjustment motor (604) is fixedly connected to the end of the rotating shaft.

7. The dedicated encapsulation device according to claim 6, characterized in that: A bidirectional screw rod (608) is rotatably connected inside the frame seat (603). The two sides of the bidirectional screw rod (608) are respectively threadedly connected to the movable seats (605) on both sides. A driving motor (607) is provided at the end of the frame seat (603), and the output shaft of the driving motor (607) is fixedly connected to the bidirectional screw rod (608); A flipping motor (601) is provided between the telescopic end of the transfer cylinder (504) and the connecting seat (602), and the output shaft of the flipping motor (601) is fixedly connected to the connecting seat (602).

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