Gas chromatograph glass liner taking and placing device and method

Abstract

The present invention relates to the technical field of pick-up and placement equipment, and in particular to a gas chromatograph glass liner pick-up and placement device, comprising a ring seat, legs connected to the bottom of the ring seat at intervals along the circumferential direction, a triangular chamber opened at the bottom of the ring seat, a triangular plate slidably provided in the chamber, a lifting mechanism provided on the triangular plate, a hollow rod connected to the bottom end of the lifting component of the lifting mechanism, a clamp for clamping the glass liner provided on the outside of the hollow rod, and a correction mechanism provided in the lifting component of the lifting mechanism. The correction mechanism can automatically correct the clamp, ensuring that the distance between each rubber clamp on the clamp and the glass liner is consistent, ensuring that the glass liner is accurately and effectively grasped and clamped, avoiding damage to the glass liner, providing a safe and efficient glass liner pick-up and placement function, and no structural modification is required to the existing gas chromatograph. The device is easy to operate and has high versatility and excellent usability.

Description

Technical Field

[0001] The present invention relates to the technical field of pick-and-place equipment, and in particular to a device and method for picking and placing a glass liner tube of a gas chromatograph. Background Art

[0002] A gas chromatograph is an analytical instrument used to separate and analyze chemical compounds, particularly those that are volatile and thermally stable. In gas chromatography, a sample is converted to a gaseous state and separated by passing it through a column filled with a stationary phase. Different components move at different speeds within the column, depending on their interaction with the stationary phase, thus achieving separation.

[0003] A glass liner is a crucial component in a gas chromatograph's sample inlet system, typically located at the inlet. It plays a key role in protecting the sample, optimizing the flow path, controlling temperature, filtering impurities, and assisting with the injection process. Maintaining and properly using glass liners is crucial to ensuring stable gas chromatograph performance.

[0004] Replacing and maintaining glass liners is a common task in practical applications. Traditionally, glass liners are removed manually by grasping them upward with tweezers. However, due to the high temperatures in which the rubber O-ring seal on the glass liner adheres to the metal of the inlet, this makes it difficult to effectively remove the glass liner with tweezers and can easily damage the expensive glass liner.

[0005] In order to solve this problem, a Chinese patent with patent publication number CN106115253A discloses a gas chromatography glass liner removal jig, which includes a bracket, a lifting mechanism and a grabbing mechanism; wherein the lifting mechanism is relatively fixed to the bracket and can be lifted and lowered relative to the bracket; the grabbing mechanism is relatively fixed to one end of the lifting mechanism and is used to grab or release the liner.

[0006] Although the above patent can grasp or release the glass liner, the above patent has the following defects in actual application:

[0007] 1. Increased operational complexity and time costs: To ensure that the gripping mechanism can accurately clamp the glass liner, the fixture's pillars need to be screwed into the fixed holes around the gas chromatograph's inlet. This means that after the glass liner is removed and placed, the fixture needs to be removed from the gas chromatograph's inlet. Before the upper cover of the gas chromatograph can be replaced, the fixture's pillars need to be screwed out of the fixed holes around the gas chromatograph's inlet. This process not only adds additional operating steps and increases time costs, but also directly affects work efficiency.

[0008] 2. Equipment structural modification and compatibility issues: If the gas chromatograph's inlet does not have pre-designed fixing holes that match the fixture's pillars, using the fixture may require physical modification of the instrument—that is, machining new fixing holes around the inlet. This modification not only affects the overall structural integrity of the equipment, but also, because different gas chromatograph models have different design standards and specifications, such modifications may not be applicable to all models, thus limiting the wide applicability of the fixture. Summary of the Invention

[0009] The present invention provides a gas chromatograph glass liner removal and placement device, which aims to provide a safe and efficient glass liner removal and placement function without any structural modification to the existing gas chromatograph, is easy to operate, and has high versatility and excellent usability.

[0010] The present invention achieves the above-mentioned purpose through the following technical solutions: a gas chromatograph glass liner taking and placing device, comprising a ring seat, the bottom of the ring seat is connected to legs at intervals along the circumferential direction, a triangular chamber is opened at the bottom of the ring seat, a triangular plate is slidably provided in the chamber, a lifting mechanism is provided on the triangular plate, the bottom end of the lifting component of the lifting mechanism is connected to a hollow rod, the outside of the hollow rod is provided with a clamp for clamping the glass liner, the lifting component of the lifting mechanism is provided with a correction mechanism, the correction mechanism includes two electric push rods installed in the lifting component of the lifting mechanism, and the electric push rods are provided. The telescopic rod of rod 2 is connected to a vertical rod, and the bottom end of the vertical rod is connected to a conical block located in the hollow rod. Three springs are connected to the top of the conical block along the circumferential direction, and the angle between the spring and the vertical rod is 45 to 65 degrees. Three pressure sensors are installed at circumferential intervals on the lower part of the vertical rod. The three pressure sensors correspond to the three reeds one by one. A pressing block is connected to the upper part of the side of the reed facing the vertical rod, which is used to press the pressure sensor. A spring is connected between the reed and the vertical rod. A pushing assembly is provided in the chamber to push the triangle plate to move back and forth horizontally in the chamber.

[0011] Preferably, the pushing assembly includes an electric push rod three, a slider and a slide rail. The three sides of the triangular plate are connected to the slide rails, and the three slide rails are connected to the sliders. Three electric push rods three are installed at circumferential intervals in the triangular chamber, and the telescopic rods on the three electric push rods three are respectively connected to the three sliders.

[0012] Preferably, the lifting mechanism includes a nut rotatably connected to the middle of the triangular plate, a hollow screw is connected to the inner thread of the nut, a guide rod is slidably connected to the triangular plate, the guide rod is connected to the hollow screw, a motor is installed on the triangular plate, a gear set is connected between the output shaft of the motor and the nut, the hollow rod is connected to the bottom end of the hollow screw, and the electric push rod 2 is installed in the hollow screw.

[0013] Preferably, the clamp includes a rubber clamp, connecting rod 1, connecting rod 2, a lifting ring and an electric push rod 1. The bottom of the hollow rod is connected with rubber clamps at even intervals along the circumference. The lower part of each rubber clamp facing away from its clamping part is connected with connecting rod 1. A lifting ring is sleeved on the outer wall of the hollow rod. Connecting rod 2 is hinged on connecting rod 1. The upper part of connecting rod 2 is hinged on the outer wall of the lifting ring. Electric push rod 1 is installed on the lower part of the guide rod, and the telescopic rod of electric push rod 1 is connected to the lifting ring.

[0014] Preferably, three groups of guide blocks are installed at intervals along the circumferential direction at the lower part of the vertical rod, and the three pressing blocks correspond one-to-one to the three groups of guide blocks, so as to guide the pressing blocks to stably and accurately press the corresponding pressure sensors.

[0015] Preferably, grooves are spaced apart on the clamping portion of the rubber clamping block.

[0016] Preferably, a fixing mechanism is provided at the bottom of the leg, which includes a mounting block and a suction cup. The bottom of each leg is connected to a mounting block, which is connected to a suction cup. A vacuum pump is installed on the ring seat, and the vacuum pump is connected to the suction cup through an air pipe.

[0017] Preferably, the outside of the lifting ring is connected to a ring-shaped lamp tube via a connecting block.

[0018] A method for taking and placing a glass liner tube of a gas chromatograph comprises the following steps:

[0019] S1. Lower the fixture and control the motor to rotate, which drives the nut to rotate through the gear set. The rotation of the nut pushes the hollow screw rod downward, and the downward movement of the hollow screw rod drives the fixture downward through the hollow rod, so that the rubber clamp on the fixture moves down and is located outside the tube mouth of the glass liner tube;

[0020] S2, fixture correction, control the electric push rod 2 to drive the vertical rod downward, so that the conical block drives the spring to move downward into the glass liner, and the spring biased towards the inner wall of the glass liner is squeezed by the inner wall of the glass liner, and swings toward the direction close to the vertical rod to compress the spring, so that the pressing block on the spring biased towards the inner wall of the glass liner presses the corresponding pressure sensor, and the pressure sensor senses that the pressure is greater than the preset value, and the pressure sensor sends a signal to the controller. After receiving the signal, the controller controls the telescopic rod of the electric push rod 3 corresponding to the reed biased towards the inner wall of the glass liner to extend, and controls the telescopic rods of the other two electric push rods to shorten, so as to push the triangle plate to translate, thereby driving the hollow screw rod to translate, so that the hollow screw rod, hollow rod, vertical rod and conical block The axis of the clamp is aligned with the axis of the glass liner, so that the distance between each rubber clamp on the clamp and the glass liner is consistent, ensuring that the subsequent rubber clamp can accurately clamp the glass liner. When the vertical rod and the conical block are translated to align the axis with the axis of the glass liner, the reed and the pressure sensor are translated accordingly, so that the distance between each reed and the inner wall of the glass liner is consistent, and the compressed spring is reset to push the reed connected to it to swing away from the vertical rod, so that the pressing block moves away from the corresponding pressure sensor. After the distance between each reed and the inner wall of the glass liner is consistent, the force of each pressing block pressing the corresponding pressure sensor is consistent. When the three pressure sensors sense the same pressure, they send a signal to the controller, and the controller controls the three electric push rods to close.

[0021] S3, remove the conical block from the glass liner, control the telescopic rod of the second electric push rod to shorten, so as to pull the vertical rod upward to reset, thereby driving the conical block and the spring to move upward back into the hollow rod and separate from the glass liner;

[0022] S4, grab the glass liner tube, control the electric push rod 1 to drive the lifting ring downward, and the lifting ring moves downward through the connecting rod 2 and the connecting rod 1 to push the rubber clamping block inward to grab the glass liner tube;

[0023] S5. Remove the glass liner tube and control the motor to reverse, thereby driving the hollow screw rod to move upward, thereby causing the fixture to move upward to remove the glass liner tube from the injection port of the gas chromatograph;

[0024] S6. Release the glass liner tube and control the electric push rod 1 to drive the lifting ring upward. The lifting ring moves upward and pulls the rubber clamping block outward through the connecting rod 2 and the connecting rod 1, thereby releasing the glass liner tube.

[0025] S7. Put the glass liner back. First, control the clamp to clamp the glass liner, and then control the lifting mechanism to drive the hollow rod to move downward, thereby driving the clamp to move downward and put the glass liner back into the injection port of the gas chromatograph.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] 1. The correction mechanism can automatically correct the fixture's deviation, ensuring that each rubber clamp on the fixture is at the same distance from the glass liner. This ensures that the glass liner is accurately and effectively grasped and clamped, avoiding damage to the glass liner. It provides a safe and efficient glass liner removal and placement function without requiring any structural modifications to the existing gas chromatograph. It is easy to operate, highly versatile, and excellent in usability.

[0028] 2. The air in the suction cup can be extracted by a vacuum pump so that the suction cup is firmly adsorbed on the gas chromatograph, thereby effectively preventing the displacement of the glass liner during the removal and placement operation of the present invention, and significantly improving the stability and safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0030] Figure 2 Schematic diagram of the installation of the lifting mechanism of the present invention.

[0031] Figure 3 It is a schematic diagram of the three-dimensional structure of the lifting mechanism of the present invention.

[0032] Figure 4 It is a schematic diagram of the three-dimensional structure of the clamp of the present invention.

[0033] Figure 5 Schematic diagram of the installation of the fixing mechanism of the present invention.

[0034] Figure 6 It is a partial three-dimensional structural diagram of the fixing mechanism of the present invention.

[0035] Figure 7 It is a schematic diagram of the three-dimensional structure of the pushing component of the present invention.

[0036] Figure 8 It is a schematic diagram of the three-dimensional structure of the fixing mechanism of the present invention.

[0037] Figure 9 This is a schematic diagram of the connection between the connecting block and the annular lamp tube of the present invention.

[0038] Serial numbers in the figure: 1-support leg, 2-ring seat, 21-chamber, 3-triangular plate, 41-nut, 42-hollow screw, 43-guide rod, 44-motor, 45-gear set, 5-hollow rod, 6-clamp, 61-rubber clamp, 62-connecting rod one, 63-connecting rod two, 64-lifting ring, 65-electric push rod one, 71-electric push rod two, 72-vertical rod, 73-conical block, 74-reed, 75-pressing block, 76-pressure sensor, 77-spring, 78-guide block, 79-electric push rod three, 710-slider, 711-slide rail, 81-mounting block, 82-suction cup, 83-trachea, 84-vacuum pump, 9-connecting block, 10-annular lamp tube. DETAILED DESCRIPTION

[0039] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0040] See also Figure 1-Figure 7A gas chromatograph glass liner taking and placing device includes a ring seat 2, and three legs 1 are connected to the bottom of the ring seat 2 at intervals along the circumferential direction. The three legs 1 are distributed in a triangular shape. The inherent stability of the triangular structure can significantly improve the support stability of the entire device, ensuring that the device is not prone to tilting or displacement during use. In addition, the triangularly distributed legs 1 can also evenly disperse the pressure from above, further enhancing the stability and load-bearing capacity of the structure. A triangular chamber 21 is opened at the bottom of the ring seat 2, and a triangular plate 3 is slidably provided in the chamber 21. A lifting mechanism is provided on the triangular plate 3. The lifting mechanism includes a nut 41 rotatably connected to the middle part of the triangular plate 3 through a bearing, a hollow screw rod 42 is threadedly connected to the nut 41, and a guide rod 43 is slidably connected to the triangular plate 3. The guide rod 43 is U-shaped. The guide rod 43 is located on the left side of the hollow screw rod 42 and is connected to the hollow screw rod 42. A motor 44 is installed on the right side of the triangular plate 3. A gear set 45 is connected between the output shaft of the motor 44 and the nut 41. The gear set 45 consists of a small gear and a large gear. The small gear is connected to the output shaft of the motor 44, and the large gear is connected to the outer wall of the nut 41. The small gear and the large gear are meshed. The bottom end of the hollow screw rod 42 is connected to a hollow rod 5. The outside of the hollow rod 5 is provided with a clamp 6 for clamping the glass liner. The clamp 6 includes a rubber clamp 61, a connecting rod 1 62, a connecting rod 2 63, a lifting ring 64 and an electric push rod 1 65. Six rubber clamps 61 are evenly spaced along the circumference at the bottom of the hollow rod 5. The clamping part of the rubber clamp 61 is made of an upper There are grooves spaced to the bottom, which help prevent the glass liner from sliding or displacing during the clamping process, thereby ensuring that the glass liner is firmly fixed, and the grooves can make the pressure applied by the rubber clamp 61 more evenly distributed, avoiding damage to the glass liner due to excessive local pressure. Each rubber clamp 61 is connected to a connecting rod 1 62 at the lower part of the side facing away from its clamping part. The shape of the connecting rod 1 62 is U-shaped, and a lifting ring 64 is slidably sleeved on the outer wall of the hollow rod 5. A connecting rod 2 63 is hinged on the connecting rod 1 62, and the upper part of the connecting rod 2 63 is hinged on the outer wall of the lifting ring 64. An electric push rod 1 65 is embedded in the lower part of the guide rod 43, and the telescopic rod of the electric push rod 1 65 is connected to the lifting ring 64. A correction mechanism is provided in the hollow screw rod 42 to correct the deviation. The mechanism includes an electric push rod 71 installed in the hollow screw rod 42, and a vertical rod 72 is connected to the telescopic rod of the electric push rod 71. The bottom end of the vertical rod 72 is connected to a conical block 73 located in the hollow rod 5. Three springs 74 are connected to the top of the conical block 73 at intervals along the circumference. The angle between the spring 74 and the vertical rod 72 is 45 to 65 degrees. Three pressure sensors 76 are installed at intervals along the circumference at the bottom of the vertical rod 72. The three pressure sensors 76 correspond to the three springs 74 one by one. A pressing block 75 is connected to the upper part of the side of the spring 74 facing the vertical rod 72 for pressing the pressure sensor 76. A spring 77 is connected between the spring 74 and the vertical rod 72. The spring 77 is located above the pressure sensor 76. Three groups of guide blocks 78 are installed at intervals along the circumference at the bottom of the vertical rod 72.The three groups of guide blocks 78 correspond to the three pressure sensors 76 one by one. There are two guide blocks in each group. The two guide blocks 78 in each group are symmetrical with the corresponding pressure sensors 76 as the center. The three pressing blocks 75 correspond to the three groups of guide blocks 78 one by one. The pressing block 75 is located between the two guide blocks 78 in its corresponding group. The pressing block 75 can be guided by the guide block 78 to ensure that the pressing block 75 can stably and accurately press the corresponding pressure sensor 76. A pushing component is provided in the chamber 21 for pushing the triangular plate 3 to move horizontally back and forth in the chamber 21. The pushing component includes an electric push rod 3 79, a slider 710 and a slide rail 711. The three sides of the triangular plate 3 are connected to the slide rail 711. The three slide rails 711 are connected to the slider 710. Three electric push rods 3 79 are installed at intervals along the circumference of the triangular chamber 21. The telescopic rods on the three electric push rods 3 79 are connected to the three sliders 710 respectively.

[0041] First, place the device at the inlet of a gas chromatograph, aligning the axis of the hollow rod 5 roughly with that of the glass liner. This allows the axis of the conical block 73 to be roughly aligned with the axis of the glass liner. Next, control the rotation of the motor 44, which drives the nut 41 through the gear train 45. This rotation pushes the hollow screw 42 downward, which in turn drives the upper component downward. The rubber clamp 61 on the clamp 6 then moves downward to the outside of the glass liner. Subsequently, the electric push rod 2 71 is controlled to drive the vertical rod 72 to move downward, so that the conical block 73 drives the spring 74 to move downward into the glass liner tube. The spring 74 on the side close to the inner wall of the glass liner tube is squeezed by the inner wall of the glass liner tube and swings toward the direction close to the vertical rod 72 to compress the spring 77, so that the pressing block 75 on the spring 74 on the side close to the inner wall of the glass liner tube presses the corresponding pressure sensor 76. The pressure sensor 76 senses that the pressure is greater than the preset value, and the pressure sensor 76 sends a signal to the controller (the controller is not shown in the figure, the controller is existing technology and will not be described here). After receiving the signal, the controller controls the telescopic rod of the electric push rod 3 79 corresponding to the spring 74 on the side close to the inner wall of the glass liner tube to extend, and controls the telescopic rods of the other two electric push rods 3 79 to shorten, thereby pushing the triangle plate 3 to translate so that the center of the triangle plate 3 is aligned with the axis of the glass liner tube. The movement of the triangle plate 3 drives its upper slide rail 711 to slide on the slider 710 to ensure smooth translation of the triangle plate 3. When the triangle plate 3 is translated so that its upper center is aligned with the axis of the glass liner, the hollow screw rod 42 is driven to translate by the nut 41, thereby causing the hollow rod 5, the vertical rod 72 and the conical block 73 to translate, and the axis of the hollow rod 5, the vertical rod 72 and the conical block 73 are then aligned with the axis of the glass liner.

[0042] When the hollow rod 5 translates to align its axis with the axis of the glass liner, it drives the entire clamp 6 to translate, ensuring that each rubber clamp 61 on the clamp 6 is at a consistent distance from the glass liner. This ensures that the rubber clamp 61 can subsequently accurately clamp the glass liner and that each rubber clamp 61 applies stable and uniform clamping force, ensuring that the glass liner is effectively removed and preventing damage to the glass liner. When the vertical rod 72 and conical block 73 translate to align their axis with the axis of the glass liner, the reed 74 and pressure sensor 76 translate accordingly, ensuring that each reed 74 is at a consistent distance from the inner wall of the glass liner. The compressed spring 77 then resets, pushing the connected reed 74 to swing away from the vertical rod 72, thereby causing the pressing block 75 to move away from its corresponding pressure sensor 76. When each reed 74 is aligned with the inner wall of the glass liner, each pressing block 75 presses its corresponding pressure sensor 76 with the same force. When the three pressure sensors 76 sense consistent pressure, they send a signal to the controller, which in turn controls the third electric push rod 79 to close. This device automatically corrects the deviation of the clamp 6, ensuring that each rubber clamp 61 on the clamp 6 is aligned with the glass liner, ensuring precise and effective gripping of the glass liner, preventing damage to the glass liner, and providing safe and efficient glass liner placement. This device requires no structural modifications to existing gas chromatographs, is simple to operate, and offers high versatility and excellent usability.

[0043] To remove the glass liner, the telescopic rod of electric push rod 2 71 is first shortened, pulling vertical rod 72 upward and resetting it, thereby driving conical block 73 and spring 74 upward and back into hollow rod 5 to disengage the glass liner. Next, electric push rod 1 65 is controlled to move lifting ring 64 downward. This downward movement of lifting ring 64, through connecting rod 2 63 and connecting rod 1 62, pushes rubber clamp 61 inward and closes, firmly clamping the glass liner. Then, motor 44 is reversed, driving hollow screw 42 upward, which in turn moves clamp 6 upward and removes the glass liner from the gas chromatograph's inlet. Electric push rod 1 65 is then controlled to move lifting ring 64 upward. This upward movement of lifting ring 64, through connecting rod 2 63 and connecting rod 1 62, pulls rubber clamp 61 outward, releasing the glass liner. When the glass liner needs to be put back, first make the clamp 6 clamp the glass liner, then control the lifting mechanism to drive the hollow rod 5 to move downward, thereby driving the clamp 6 to move downward and put the glass liner back into the sampling port of the gas chromatograph, and then control the clamp 6 to release the glass liner, and finally the device can be removed from the gas chromatograph.

[0044] See also Figure 7A fixing mechanism is provided at the bottom of the leg 1, which includes a mounting block 81 and a suction cup 82. The bottoms of the three legs 1 are connected to the mounting block 81, and the suction cup 82 is connected to the mounting block 81. Three vacuum pumps 84 are installed on the inner bottom surface of the ring seat 2 at intervals along the circumferential direction. The three vacuum pumps 84 correspond to the three suction cups 82 one by one, and the vacuum pumps 84 and the corresponding suction cups 82 are connected through the air pipe 83.

[0045] The vacuum pump 84 is controlled to pump air out of the suction cup 82 through the air pipe 83, firmly adhering the suction cup 82 to the gas chromatograph. This effectively prevents displacement of the device during glass liner removal and placement, significantly improving operational stability and safety. To remove the device from the gas chromatograph, the vacuum pump 84 is controlled to re-inject air into the suction cup 82 through the air pipe 83, loosening the suction cup 82 and allowing easy removal from the gas chromatograph.

[0046] See also Figure 1 and Figure 9 The outside of the lifting ring 64 is connected to a ring-shaped light tube 10 through a connecting block 9. The ring-shaped light tube 10 is located on the upper side of the connecting rod 2 63. The ring-shaped light tube 10 can project an annular aperture. When the staff places the device at the glass inlet of the gas chromatograph, they can use this annular aperture as a reference to help ensure that the axis of the hollow rod 5 is roughly aligned with the axis of the glass liner, so that the axis of the conical block 73 can be roughly aligned with the axis of the glass liner, reducing the risk of damage to the glass liner due to excessive position deviation between the conical block 73 and the glass liner.

[0047] A method for taking and placing a glass liner tube of a gas chromatograph comprises the following steps:

[0048] S1. Lower the fixture 6 and control the motor 44 to rotate, which drives the nut 41 to rotate through the gear set 45. The rotation of the nut 41 pushes the hollow screw 42 downward. The downward movement of the hollow screw 42 drives the fixture 6 downward through the hollow rod 5, so that the rubber clamp 61 on the fixture 6 moves downward and is located outside the nozzle of the glass liner tube;

[0049] The second clamp 71 is controlled to drive the vertical rod 72 downward, so that the cone block 73 drives the spring 74 to move downward into the glass liner tube. The spring 74 on the side close to the inner wall of the glass liner tube is squeezed by the inner wall of the glass liner tube and swings toward the direction close to the vertical rod 72 to compress the spring 77, so that the pressing block 75 on the spring 74 on the side close to the inner wall of the glass liner tube presses the corresponding pressure sensor 76. The pressure sensor 76 senses that the pressure is greater than the preset value. The pressure sensor 76 sends a signal to the controller. After receiving the signal, the controller controls the telescopic rod of the third electric push rod 79 corresponding to the spring 74 on the side close to the inner wall of the glass liner tube to extend, and controls the telescopic rods of the other two electric push rods 79 to shorten, so as to push the triangle plate 3 to translate, thereby driving the hollow screw rod 42 to translate, so that the hollow screw rod 42, the hollow rod 5, the vertical rod 72 and the cone The axis of the block 73 is aligned with the axis of the glass liner, thereby making the distance between each rubber clamping block 61 on the clamp 6 and the glass liner consistent, ensuring that the subsequent rubber clamping block 61 can accurately clamp the glass liner. When the vertical rod 72 and the conical block 73 translate to align the axis with the axis of the glass liner, the reed 74 and the pressure sensor 76 translate accordingly, so that the distance between each reed 74 and the inner wall of the glass liner is consistent, and the compressed spring 77 is reset to push the reed 74 connected to it to swing away from the vertical rod 72, thereby making the pressing block 75 move away from its corresponding pressure sensor 76. After the distance between each reed 74 and the inner wall of the glass liner is consistent, the force of each pressing block 75 pressing the corresponding pressure sensor 76 is consistent. When the three pressure sensors 76 sense the consistent pressure, they send a signal to the controller, and the controller controls the electric push rod 3 79 to close.

[0050] S3. Remove the conical block 73 from the glass liner and control the telescopic rod of the second electric push rod 71 to shorten, thereby pulling the vertical rod 72 upward to reset, thereby driving the conical block 73 and the spring 74 to move upward back into the hollow rod 5 and disengage from the glass liner.

[0051] S4, grab the glass liner tube, control the electric push rod 1 65 to drive the lifting ring 64 to move downward, and the lifting ring 64 moves downward through the connecting rod 2 63 and the connecting rod 1 62 to push the rubber clamp 61 inward to close and grab the glass liner tube;

[0052] S5. Remove the glass liner tube and control the motor 44 to reverse, thereby driving the hollow screw 42 to move upward, thereby causing the clamp 6 to move upward to remove the glass liner tube from the injection port of the gas chromatograph;

[0053] S6. Release the glass liner tube and control the electric push rod 1 65 to drive the lifting ring 64 to move upward. The lifting ring 64 moves upward and pulls the rubber clamp 61 outward through the connecting rod 2 63 and the connecting rod 1 62 to release the glass liner tube.

[0054] S7. Put the glass liner back. First, control the clamp 6 to clamp the glass liner, and then control the lifting mechanism to drive the hollow rod 5 to move downward, thereby driving the clamp 6 to move downward and put the glass liner back into the injection port of the gas chromatograph.

[0055] The above-described embodiments merely represent preferred embodiments of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous modifications, improvements, and substitutions without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A gas chromatograph glass liner removal and placement device, comprising a ring seat (2), the bottom of the ring seat (2) being connected to legs (1) at intervals along the circumferential direction, characterized in that: A triangular chamber (21) is provided at the bottom of the ring seat (2), a triangular plate (3) is provided in a sliding manner in the chamber (21), a lifting mechanism is provided on the triangular plate (3), the bottom end of the lifting component of the lifting mechanism is connected to a hollow rod (5), the outside of the hollow rod (5) is provided with a clamp (6) for clamping the glass liner, a correction mechanism is provided in the lifting component of the lifting mechanism, the correction mechanism includes an electric push rod 2 (71) installed in the lifting component of the lifting mechanism, a vertical rod (72) is connected to the telescopic rod of the electric push rod 2 (71), the bottom end of the vertical rod (72) is connected to a conical block (73) located in the hollow rod (5), and three springs (74) are connected to the top of the conical block (73) at intervals along the circumferential direction, and the springs (74) and the vertical rod (71) are connected. 2) is 45 to 65 degrees, three pressure sensors (76) are installed at intervals along the circumference of the lower part of the vertical rod (72), and the three pressure sensors (76) correspond to the three reeds (74) one by one. The upper part of the reed (74) facing the vertical rod (72) is connected to a pressing block (75) for pressing the pressure sensor (76). A spring (77) is connected between the reed (74) and the vertical rod (72). A pushing assembly is provided in the chamber (21) for pushing the triangular plate (3) to move back and forth horizontally in the chamber (21). The pushing assembly includes three electric push rods (79), a slider (710) and a slide rail (711). The three sides of the triangular plate (3) are connected to the slide rail (711). The three slide rails ( 711) are connected to a slider (710), three electric push rods (79) are installed at intervals along the circumference of the triangular chamber (21), and the telescopic rods on the three electric push rods (79) are respectively connected to the three sliders (710), and the lifting mechanism includes a nut (41) rotatably connected to the middle part of the triangular plate (3), the nut (41) is connected to the hollow screw (42) through an internal thread, and a guide rod (43) is slidably connected to the triangular plate (3), and the guide rod (43) is connected to the hollow screw (42), and a motor (44) is installed on the triangular plate (3), and a gear set (45) is connected between the output shaft of the motor (44) and the nut (41), and the hollow rod (5) is connected to the bottom end of the hollow screw (42). Rod 2 (71) is installed in the hollow screw rod (42), and the clamp (6) includes a rubber clamping block (61), a connecting rod 1 (62), a connecting rod 2 (63), a lifting ring (64) and an electric push rod 1 (65). The bottom of the hollow rod (5) is connected with rubber clamping blocks (61) at even intervals along the circumference. The lower part of each rubber clamping block (61) facing away from its clamping part is connected with connecting rod 1 (62). A lifting ring (64) is sleeved on the outer wall of the hollow rod (5). Connecting rod 2 (63) is hinged on connecting rod 1 (62). The upper part of connecting rod 2 (63) is hinged on the outer wall of the lifting ring (64). The lower part of the guide rod (43) is installed with electric push rod 1 (65), and the telescopic rod of electric push rod 1 (65) is connected to the lifting ring (64).

2. A gas chromatograph glass liner taking and placing device according to claim 1, characterized in that: Three groups of guide blocks (78) are installed at intervals along the circumferential direction at the lower part of the vertical rod (72), and the three pressing blocks (75) correspond to the three groups of guide blocks (78) one by one, so as to guide the pressing blocks (75) to stably and accurately press the corresponding pressure sensors (76).

3. The device for taking and placing a glass liner tube of a gas chromatograph according to claim 1, characterized in that: Grooves are spaced apart on the clamping portion of the rubber clamping block (61).

4. The device for taking and placing a glass liner tube of a gas chromatograph according to claim 1, characterized in that: A fixing mechanism is provided at the bottom of the supporting leg (1), and the fixing mechanism includes a mounting block (81) and a suction cup (82). The bottom of each supporting leg (1) is connected to the mounting block (81), and the mounting block (81) is connected to the suction cup (82). A vacuum pump (84) is installed on the ring seat (2), and the vacuum pump (84) is connected to the suction cup (82) through an air pipe (83).

5. The device for taking and placing a glass liner tube of a gas chromatograph according to claim 1, characterized in that: The outside of the lifting ring (64) is connected to a ring-shaped light tube (10) via a connecting block (9).

6. A method for taking and placing a glass liner tube of a gas chromatograph, based on the device for taking and placing a glass liner tube of a gas chromatograph according to claim 1, characterized in that: The following steps are involved: S1, lowering the fixture (6), controlling the motor (44) to rotate, driving the nut (41) to rotate through the gear set (45), the nut (41) rotates to push the hollow screw (42) downward, and the hollow screw (42) moves downward to drive the fixture (6) downward through the hollow rod (5), so that the rubber clamp (61) on the fixture (6) moves downward and is located outside the tube mouth of the glass liner; S2, the clamp (6) corrects the deviation, controls the electric push rod 2 (71) to drive the vertical rod (72) downward, so that the conical block (73) drives the spring (74) to move downward into the glass liner, and the spring (74) on the side close to the inner wall of the glass liner is squeezed by the inner wall of the glass liner, and swings toward the direction close to the vertical rod (72) to compress the spring (77), so that the pressing block (75) on the spring (74) on the side close to the inner wall of the glass liner presses the corresponding pressure sensor (7 6), the pressure sensor (76) senses that the pressure is greater than the preset value, and the pressure sensor (76) sends a signal to the controller. After receiving the signal, the controller controls the telescopic rod of the electric push rod three (79) corresponding to the reed (74) on the side close to the inner wall of the glass liner to extend, and controls the telescopic rods of the other two electric push rods three (79) to shorten, so as to push the triangle plate (3) to move horizontally, thereby driving the hollow screw rod (42) to move horizontally, so that the hollow screw rod (42), the hollow rod (5), the vertical rod (72) and The axis of the conical block (73) is aligned with the axis of the glass liner, so that the distance between each rubber clamp (61) on the clamp (6) and the glass liner is consistent, ensuring that the subsequent rubber clamp (61) can accurately clamp the glass liner. When the vertical rod (72) and the conical block (73) are translated to align the axis with the axis of the glass liner, the reed (74) and the pressure sensor (76) are translated accordingly, so that the distance between each reed (74) and the inner wall of the glass liner is consistent, and the compressed spring (77) is moved accordingly. The reset is performed to push the spring (74) connected thereto to swing away from the vertical rod (72), thereby causing the pressing block (75) to move away from the corresponding pressure sensor (76). After the distance between each spring (74) and the inner wall of the glass liner is consistent, the force of each pressing block (75) pressing the corresponding pressure sensor (76) is consistent. When the three pressure sensors (76) sense the same pressure, they send a signal to the controller, and the controller controls the electric push rod three (79) to close. S3, remove the conical block (73) from the glass liner, control the telescopic rod of the second electric push rod (71) to shorten, so as to pull the vertical rod (72) upward to reset, thereby driving the conical block (73) and the spring (74) to move upward back into the hollow rod (5) and separate from the glass liner; S4, grab the glass liner, control the electric push rod 1 (65) to drive the lifting ring (64) to move downward, and the lifting ring (64) moves downward through the connecting rod 2 (63) and the connecting rod 1 (62) to push the rubber clamp (61) inward to close and grab the glass liner; S5, taking out the glass liner, controlling the motor (44) to reverse, thereby driving the hollow screw (42) to move upward, and then causing the clamp (6) to move upward to take out the glass liner from the injection port of the gas chromatograph; S6, loosen the glass liner, control the electric push rod 1 (65) to drive the lifting ring (64) to move upward, and the lifting ring (64) moves upward through the connecting rod 2 (63) and the connecting rod 1 (62) to pull the rubber clamp (61) outward to loosen the glass liner; S7. Put the glass liner back. First, control the clamp (6) to clamp the glass liner, and then control the lifting mechanism to drive the hollow rod (5) to move downward, thereby driving the clamp (6) to move downward and put the glass liner back into the injection port of the gas chromatograph.

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