Device and method for taking and placing glass liner tube of gas chromatograph

Abstract

The invention relates to the technical field of pick-and-place equipment, in particular to a gas chromatograph glass liner tube pick-and-place device which comprises a ring seat, supporting legs are connected to the bottom of the ring seat at intervals in the circumferential direction, a triangular cavity is formed in the bottom of the ring seat, a triangular plate is arranged in the cavity in a sliding mode, and a lifting mechanism is arranged on the triangular plate. The bottom end of a lifting part of the lifting mechanism is connected with a hollow rod, a clamp for clamping a glass liner tube is arranged outside the hollow rod, and a deviation rectifying mechanism is arranged in the lifting part of the lifting mechanism. The deviation rectifying mechanism can be used for automatically rectifying the deviation of the clamp, ensuring that the distance between each rubber clamping block on the clamp and the glass liner tube is consistent, ensuring that the glass liner tube is accurately and effectively grabbed and clamped, preventing the glass liner tube from being damaged, and providing a safe and efficient glass liner tube taking and placing function without any structural modification on the existing gas chromatograph; the method is simple and convenient to operate, and has high universality and excellent usability.

Description

Technical Field

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

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

[0003] The glass liner is an important component in the gas chromatograph injection system, usually located at the injection port. It plays a key role in protecting the sample, optimizing the flow path, controlling the temperature, filtering impurities, and assisting the injection process. Maintaining and using the glass liner correctly is essential to ensure the stable performance of the gas chromatograph.

[0004] In actual operation, the replacement and maintenance of glass liners are common tasks. Traditionally, the glass liner is manually removed by directly clamping it upwards with tweezers. However, since the rubber sealing O-ring on the glass liner will bond with the metal at the injection port under high temperature, it is difficult to effectively remove the glass liner with tweezers, and it is easy to 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 practical application: 1. Increased operational complexity and time cost: In order to ensure that the gripping mechanism can accurately clamp the glass liner, the support of the fixture needs to be screwed into the fixed holes around the gas chromatograph inlet. This means that after the glass liner is taken and placed, the fixture needs to be removed from the inlet of the gas chromatograph, and before the upper cover of the gas chromatograph is put back on, the support of the fixture needs to be screwed out from the fixed holes around the inlet of the gas chromatograph. This process not only adds additional operating steps and increases time costs, but also directly affects work efficiency.

[0007] 2. Equipment structure modification and compatibility issues: If there are no pre-designed fixing holes around the gas chromatograph's injection port that match the fixture pillars, then when using the fixture, the instrument may need to be physically modified - that is, new fixing holes are machined around the injection port. This modification not only affects the overall structural integrity of the equipment, but also because different models of gas chromatographs 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

[0008] The present invention provides a gas chromatograph glass liner taking and placing device, aiming to provide a safe and efficient glass liner taking and placing function, without any structural modification to the existing gas chromatograph, with simple operation, high versatility and excellent ease of use.

[0009] The present invention achieves the above-mentioned purpose through the following technical scheme: a gas chromatograph glass liner taking and placing device, comprising a ring seat, the bottom of the ring seat is connected with legs at intervals along the circumferential direction, a triangular chamber is opened at the bottom of the ring seat, a triangular plate is slidably arranged in the chamber, a lifting mechanism is arranged on the triangular plate, a hollow rod is connected to the bottom end of the lifting component of the lifting mechanism, a clamp for clamping the glass liner is arranged outside the hollow rod, a deviation correction mechanism is arranged in the lifting component of the lifting mechanism, the deviation correction mechanism includes two electric push rods installed in the lifting component of the lifting mechanism, and the electric push rod 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 at circumferential intervals, and the angle between the springs 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, and the three pressure sensors correspond to the three springs one by one. A pressing block is connected to the upper part of the side of the spring facing the vertical rod for pressing the pressure sensor. A spring is connected between the spring and the vertical rod, and a pushing assembly is provided in the chamber for pushing the triangle plate to move back and forth horizontally in the chamber.

[0010] 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, the three slide rails are connected to the sliders, and three electric push rods three are installed at circumferential intervals in the triangular chamber. The telescopic rods on the three electric push rods three are respectively connected to the three sliders.

[0011] Preferably, the lifting mechanism includes a nut rotatably connected to the middle part 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.

[0012] Preferably, the clamp includes a rubber clamp block, a connecting rod 1, a connecting rod 2, a lifting ring and an electric push rod 1. The bottom of the hollow rod is connected with rubber clamp blocks at uniform intervals along the circumferential direction. The lower part of each rubber clamp is connected with a connecting rod 1 on the side opposite to its clamping part. A lifting ring is sleeved on the outer wall of the hollow rod. The connecting rod 1 is hinged with the connecting rod 2. The upper part of the connecting rod 2 is hinged to the outer wall of the lifting ring. The lower part of the guide rod is installed with an electric push rod 1, and the telescopic rod of the electric push rod 1 is connected to the lifting ring.

[0013] 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 to the three groups of guide blocks one by one, so as to guide the pressing blocks to stably and accurately press the corresponding pressure sensors.

[0014] Preferably, grooves are spaced apart on the clamping portion of the rubber clamp.

[0015] Preferably, a fixing mechanism is provided at the bottom of the leg, the fixing mechanism includes a mounting block and a suction cup, the bottom of each leg is connected to a mounting block, the mounting block 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.

[0016] Preferably, the outside of the lifting ring is connected to a ring-shaped lamp tube via a connecting block.

[0017] A method for taking and placing a glass liner tube of a gas chromatograph comprises the following steps: S1, lower the fixture, control the motor to rotate, drive the nut to rotate through the gear set, the nut rotates to push the hollow screw rod to move downward, the hollow screw rod moves downward to drive the fixture downward through the hollow rod, so that the rubber clamp on the fixture moves downward to be located outside the pipe mouth of the glass liner tube; 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 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 to compress the spring, so that the pressing block on the spring on the side close to 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 spring 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 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 block on the clamp and the glass liner is consistent, ensuring that the subsequent rubber clamp blocks 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 accordingly 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 consistent pressure, they send a signal to the controller, and the controller controls the electric push rod to close three times; S3, take the conical block out of 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; S4, grab the glass liner tube, control the electric push rod 1 to drive the lifting ring to move downward, and the lifting ring moves downward to push the rubber clamp block to close inward through the connecting rod 2 and the connecting rod 1 to grab the glass liner tube; S5, taking out the glass liner, controlling the motor to reverse, thereby driving the hollow screw rod to move upward, and then causing the fixture 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 to drive the lifting ring to move upward, and the lifting ring moves upward to pull the rubber clamp block to open outward through the connecting rod 2 and the connecting rod 1, thereby loosening the glass liner; 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.

[0018] Compared with the prior art, the present invention has the following advantages: 1. The correction mechanism can automatically correct the fixture to ensure that the distance between each rubber clamp on the fixture and the glass liner is consistent, ensuring that the glass liner is accurately and effectively grasped and clamped to avoid damage to the glass liner. It provides a safe and efficient glass liner pick-up and placement function without any structural modification to the existing gas chromatograph. It is easy to operate and has high versatility and excellent ease of use.

[0019] 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 glass liner from being displaced during the taking and placing operation, and significantly improving the stability and safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the installation of the lifting mechanism of the present invention.

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the lifting mechanism of the present invention.

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the clamp of the present invention.

[0024] Figure 5 It is a schematic diagram of the installation of the fixing mechanism of the present invention.

[0025] Figure 6 It is a partial three-dimensional structural schematic diagram of the fixing mechanism of the present invention.

[0026] Figure 7 It is a schematic diagram of the three-dimensional structure of the pushing assembly of the present invention.

[0027] Figure 8 It is a three-dimensional structural schematic diagram of the fixing mechanism of the present invention.

[0028] Fig. 9 It is a schematic diagram of the connection between the connecting block and the annular lamp tube of the present invention.

[0029] Serial numbers in the figure: 1-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

[0030] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here 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. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0031] See also Figure 1-Figure 7A gas chromatograph glass liner taking and placing device comprises a ring seat 2, three legs 1 are connected to the bottom of the ring seat 2 at intervals along the circumferential direction, and 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 tilt 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, a triangular plate 3 is slidably provided in the chamber 21, and a lifting mechanism is provided on the triangular plate 3. The lifting mechanism comprises a nut 41 rotatably connected to the middle 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 in a U-shape. 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 block 61, a connecting rod 1 62, a connecting rod 2 63, a lifting ring 64 and an electric push rod 1 65. Six rubber clamp blocks 61 are evenly spaced along the circumferential direction at the bottom of the hollow rod 5. The clamping part of the rubber clamp block 61 is composed of an upper There are grooves separated from the lower part to the lower part, 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 block 61 more evenly distributed to avoid damage to the glass liner due to excessive local pressure. Each rubber clamp block 61 is connected to a connecting rod 62 at the lower part of the side facing away from its clamping part. The shape of the connecting rod 62 is U-shaped, and a lifting ring 64 is slidably sleeved on the outer wall of the hollow rod 5. A connecting rod 63 is hinged on the connecting rod 62, and the upper part of the connecting rod 63 is hinged on the outer wall of the lifting ring 64. An electric push rod 65 is embedded in the lower part of the guide rod 43, and the telescopic rod of the electric push rod 65 is connected to the lifting ring 64. A correction mechanism is provided in the hollow screw rod 42. Correction The mechanism includes an electric push rod 71 installed in the hollow screw rod 42, a vertical rod 72 is connected to the telescopic rod of the electric push rod 71, a conical block 73 located in the hollow rod 5 is connected to the bottom end of the vertical rod 72, three springs 74 are connected to the top of the conical block 73 along the circumferential direction, the angle between the spring 74 and the vertical rod 72 is 45 to 65 degrees, three pressure sensors 76 are installed along the circumferential direction 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, which is used to press 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, and three groups of guide blocks 78 are installed along the circumferential direction 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. The number of guide blocks 78 in each group is two. 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. The chamber 21 is provided with a pushing component 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 rails 711. The three slide rails 711 are connected to the sliders 710. Three electric push rods 3 79 are installed at intervals along the circumferential direction in the triangular chamber 21. The telescopic rods on the three electric push rods 3 79 are connected to the three sliders 710 respectively.

[0032] First, the device is placed at the injection port of the gas chromatograph, and 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. Then, the motor 44 is controlled to rotate, thereby driving the nut 41 to rotate through the gear set 45, and the rotation of the nut 41 pushes the hollow screw rod 42 to move downward, and the hollow screw rod 42 moves downward to drive the upper component thereof to move downward, and the rubber clamp block 61 on the clamp 6 moves downward and is located outside the tube mouth 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. 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 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 prior art, and it is not repeated 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 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, and the movement of the triangle plate 3 drives the 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 translated through 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.

[0033] When the hollow rod 5 translates so that its axis is aligned with the axis of the glass liner, the entire clamp 6 is translated so that each rubber clamp 61 on the clamp 6 is at the same distance from the glass liner, ensuring that the subsequent rubber clamp 61 can accurately clamp the glass liner, ensuring that each subsequent rubber clamp 61 applies pressure stably and evenly to apply clamping force, so as to ensure that the glass liner is effectively removed and avoid damage to the glass liner. When the vertical rod 72 and the conical block 73 translate so that their axis is aligned with the axis of the glass liner, the reed 74 and the pressure sensor 76 translate accordingly so that each reed 74 is at the same distance from the inner wall of the glass liner, and the compressed spring 77 is reset accordingly to push the reed 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 reed 74 and the inner wall of the glass liner is consistent, each pressing block 75 presses the corresponding pressure sensor 76 with the same force. 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 3 79 to close. In this way, the device can automatically correct the deviation of the clamp 6, ensure that the distance between each rubber clamp block 61 on the clamp 6 and the glass liner is consistent, ensure that the glass liner is accurately and effectively grasped and clamped, avoid damage to the glass liner, provide a safe and efficient glass liner pick-up and placement function, do not need to make any structural modifications to the existing gas chromatograph, are easy to operate, and have high versatility and excellent ease of use.

[0034] When the glass liner needs to be grabbed, the telescopic rod of the electric push rod 2 71 is first controlled 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. Then, the electric push rod 1 65 is controlled to drive the lifting ring 64 downward. The lifting ring 64 moves downward to push the rubber clamp 61 inward through the connecting rod 2 63 and the connecting rod 1 62 to firmly clamp the glass liner. Then the motor 44 is controlled to reverse, thereby driving the hollow screw rod 42 upward, thereby causing the clamp 6 to move upward to remove the glass liner from the injection port of the gas chromatograph. Then, the electric push rod 1 65 is controlled to drive the lifting ring 64 upward. The lifting ring 64 moves upward to pull the rubber clamp 61 outward through the connecting rod 2 63 and the connecting rod 1 62 to release the glass liner. When the glass liner needs to be put back, first clamp the glass liner by the clamp 6, 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, and then control the clamp 6 to release the glass liner, and finally the device can be removed from the gas chromatograph.

[0035] See also Figure 7A fixing mechanism is provided at the bottom of the leg 1, and the fixing mechanism includes a mounting block 81 and a suction cup 82. The bottoms of the three legs 1 are connected with the mounting blocks 81, and the mounting blocks 81 are connected with the suction cup 82. Three vacuum pumps 84 are installed at intervals along the circumferential direction on the inner bottom surface of the ring seat 2. 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 air pipes 83.

[0036] The vacuum pump 84 is controlled to work to extract the air in the suction cup 82 through the air pipe 83, so that the suction cup 82 is firmly adsorbed on the gas chromatograph, thereby effectively preventing the device from being displaced during the glass liner removal and placement operation, and significantly improving the stability and safety of the operation. When the device needs to be removed from the gas chromatograph, the vacuum pump 84 is controlled to work to re-input the gas into the suction cup 82 through the air pipe 83, so that the suction cup 82 is loosened, so that the device can be easily removed from the gas chromatograph.

[0037] See also Figure 1 and Fig. 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 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.

[0038] A method for taking and placing a glass liner tube of a gas chromatograph comprises the following steps: S1, lower the clamp 6, control the motor 44 to rotate, drive the nut 41 to rotate through the gear set 45, the nut 41 rotates to push the hollow screw rod 42 to move downward, the hollow screw rod 42 moves downward and drives the clamp 6 to move downward through the hollow rod 5, so that the rubber clamp block 61 on the clamp 6 moves downward and is located outside the pipe mouth of the glass liner tube; S2, the clamp 6 corrects the deviation and controls the electric push rod 2 71 to drive the vertical rod 72 to move downward, so that the cone block 73 drives the spring 74 to move downward into the glass liner. 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 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 electric push rod 3 79 corresponding to the spring 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 3 79 to shorten, so as to push the triangular 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, so that the distance between each rubber clamping block 61 on the clamp 6 and the glass liner is 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 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 reset accordingly to push the reed 74 connected thereto to swing away from the vertical rod 72, so that the pressing block 75 moves away from the 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. S3, the conical block 73 is taken out from the glass liner, and the telescopic rod of the electric push rod 2 71 is controlled 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 tube, control the electric push rod 1 65 to drive the lifting ring 64 to move downward, and the lifting ring 64 moves downward to push the rubber clamp 61 to close inward through the connecting rod 2 63 and the connecting rod 1 62 to grab the glass liner tube; 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 to pull the rubber clamp 61 outward through the connecting rod 2 63 and the connecting rod 1 62 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.

[0039] The above-mentioned embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those skilled in the art, several modifications, improvements and substitutions can be made without departing from the concept of the present invention, and these all belong to the protection scope 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 with 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 slidably provided in the chamber (21), a lifting mechanism is provided on the triangular plate (3), a hollow rod (5) is connected to the bottom end of the lifting component of the lifting mechanism, a clamp (6) for clamping the glass liner is provided outside the hollow rod (5), a deviation correction mechanism is provided in the lifting component of the lifting mechanism, the deviation correction mechanism comprises an electric push rod (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 (71), a conical block (73) located in the hollow rod (5) is connected to the bottom end of the vertical rod (72), and the conical block (73) is provided in the hollow rod (5). ) is connected to the top of the vertical rod (72) at intervals along the circumferential direction, and 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 circumferential direction 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). 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).

2. A gas chromatograph glass liner tube taking and placing device according to claim 1, characterized in that: The pushing assembly comprises an electric push rod three (79), a slider (710) and a slide rail (711); the three side surfaces of the triangular plate (3) are connected to the slide rails (711); the three slide rails (711) are connected to the slide rails (710); three electric push rods three (79) are installed at intervals along the circumferential direction in the triangular chamber (21); and the telescopic rods on the three electric push rods three (79) are respectively connected to the three slide rails (710).

3. A gas chromatograph glass liner tube taking and placing device according to claim 2, characterized in that: The lifting mechanism comprises a nut (41) rotatably connected to the middle part of the triangular plate (3), the nut (41) is internally threadedly connected to a hollow screw rod (42), a guide rod (43) is slidably connected to the triangular plate (3), the guide rod (43) is connected to the hollow screw rod (42), a motor (44) is mounted on the triangular plate (3), a gear set (45) is connected between the output shaft of the motor (44) and the nut (41), a hollow rod (5) is connected to the bottom end of the hollow screw rod (42), and a second electric push rod (71) is mounted in the hollow screw rod (42).

4. A gas chromatograph glass liner taking and placing device according to claim 3, characterized in that: The clamp (6) comprises 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). The bottom of the hollow rod (5) is connected to the rubber clamp (61) at even intervals along the circumferential direction. The lower part of each rubber clamp (61) on the side opposite to the clamping part thereof is connected to the connecting rod 1 (62). The lifting ring (64) is sleeved on the outer wall of the hollow rod (5). The connecting rod 1 (62) is hingedly connected to the connecting rod 2 (63). The upper part of the connecting rod 2 (63) is hingedly connected to the outer wall of the lifting ring (64). The lower part of the guide rod (43) is equipped with the electric push rod 1 (65). The telescopic rod of the electric push rod 1 (65) is connected to the lifting ring (64).

5. The device for taking and placing a glass liner tube of a gas chromatograph 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).

6. A gas chromatograph glass liner tube taking and placing device according to claim 4, characterized in that: Grooves are spaced apart on the clamping portion of the rubber clamp (61).

7. A gas chromatograph glass liner tube taking and placing device according to claim 1, characterized in that: A fixing mechanism is provided at the bottom of the supporting leg (1), the fixing mechanism comprising a mounting block (81) and a suction cup (82), the bottom of each supporting leg (1) is connected to the mounting block (81), 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) via an air pipe (83).

8. A gas chromatograph glass liner tube taking and placing device according to claim 4, characterized in that: The outside of the lifting ring (64) is connected to a ring-shaped light tube (10) via a connecting block (9).

9. 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 4, characterized in that: The following steps are involved: S1, lowering the clamp (6), controlling the motor (44) to rotate, driving the nut (41) to rotate through the gear set (45), the nut (41) rotating to push the hollow screw rod (42) to move downward, the hollow screw rod (42) moving downward drives the clamp (6) to move downward through the hollow rod (5), so that the rubber clamping block (61) on the clamp (6) moves downward and is located outside the pipe mouth of the glass liner tube; S2, the clamp (6) corrects the deviation, controls the second electric push rod (71) 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, and 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 in 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 (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 tube to extend, and controls the telescopic rods of the other two electric push rods three (79) to shorten, so as to push the triangular 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 axis of the conical block (73) is aligned with the axis of the glass liner, so that each rubber clamp (61) on the clamp (6) is at the same distance from the glass liner, 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 each reed (74) is at the same distance from the inner wall of the glass liner, and the compressed spring (77) is moved accordingly. The reed (74) connected thereto is reset to swing in a direction away from the vertical rod (72), so that the pressing block (75) moves in a direction away from the corresponding pressure sensor (76). After the distance between each reed (74) and the inner wall of the glass liner tube 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, taking the conical block (73) out of the glass liner tube, controlling 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 tube; 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 to push the rubber clamping block (61) inward through the connecting rod 2 (63) and the connecting rod 1 (62) to close and grab the glass liner tube; S5, taking out the glass liner tube, 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 tube 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 to pull the rubber clamp (61) to open outward through the connecting rod 2 (63) and the connecting rod 1 (62), thereby loosening 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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