A sample feeding device of a sulfur tester

Abstract

The utility model discloses a kind of sample feeding devices of sulfur tester, including sample feeding shell, its one end is equipped with sample feeding passageway mouth;Stable shell is installed in sample feeding passageway mouth by first lifting mechanism and can be up and down lifted;Its inner bottom is provided with friction wheel, its inside two sides are provided with clamping limiting portion, friction wheel is connected with clamping limiting portion linkage by pneumatic transmission assembly;Sample feeding rod is set in sample feeding shell, and it is slid forward and backward in stable shell along horizontal direction by sample feeding drive mechanism, and the end of sample feeding rod close to sample feeding passageway mouth is connected with porcelain boat;Friction wheel is contacted with sample feeding rod, and it rotates with the sliding of sample feeding rod;Two sides clamping limiting portion is close to sample feeding rod and clamping limiting sample feeding rod with the rotation of friction wheel;Sample feeding drive mechanism is installed in sample feeding shell by second lifting mechanism and can be up and down lifted, and sample feeding rod can be up and down adjusted sample feeding height by second lifting mechanism.The utility model significantly improves the stability of sample feeding process, guarantees sample putting precision.

Description

Technical Field

[0001] This utility model relates to the field of sulfur analyzer sample delivery technology, specifically to a sample delivery device for a sulfur analyzer. Background Technology

[0002] As a core auxiliary module of the sulfur content analysis system, the sample delivery device of the sulfur analyzer is responsible for the automated transmission and precise positioning of samples from the pretreatment stage to the analysis chamber. Its performance directly affects the accuracy and reliability of the sulfur content detection results and is widely used in key fields such as coal quality inspection, metallurgical analysis, and environmental monitoring.

[0003] However, existing sulfur analyzer sample delivery devices have the following prominent problems in actual operation: 1. Insufficient sample delivery stability: During horizontal movement, the sample delivery rod is prone to lateral deviation or swaying due to mechanical clearances, vibrations, and other factors, leading to positional deviations of the sample-bearing components (such as the ceramic boat) and affecting sample delivery accuracy; 2. Risk of mechanical jamming: Traditional sample delivery mechanisms lack a real-time adaptive limit mechanism. After long-term reciprocating motion of the sample delivery rod, wear on the transmission components may exacerbate jamming, even causing the sample boat to jam and interrupting the detection process; 3. Limited adjustment accuracy: The lifting and adjusting structure of some devices lacks stability, and tilting or swaying easily occurs during fine adjustments in the vertical direction, making it difficult to meet the stringent requirements of high-precision detection for sample position; 4. Need for manual intervention: Due to stability issues, frequent manual calibration of the sample delivery path is required, which not only increases operational errors but also reduces the efficiency of automated detection. Therefore, a new sample delivery device for sulfur analyzers is urgently needed. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a sample delivery device for a sulfur analyzer.

[0005] This utility model discloses a method comprising:

[0006] The sample delivery casing has a sample delivery channel opening at one end;

[0007] A stable housing is installed in the sample delivery channel opening, which can be raised and lowered by a first lifting mechanism; a friction wheel is provided at the bottom of the housing, and clamping and limiting parts are provided on both sides of the housing; the friction wheel is linked to the clamping and limiting parts through a pneumatic transmission assembly.

[0008] A sample delivery rod is disposed inside the sample delivery housing and slides back and forth horizontally within the stable housing via a sample delivery drive mechanism. A ceramic boat is connected to one end of the sample delivery rod near the sample delivery channel opening. The friction wheel contacts the sample delivery rod and rotates as the sample delivery rod slides. The clamping and limiting parts on both sides move closer to the sample delivery rod as the friction wheel rotates and clamp and limit the sample delivery rod.

[0009] The sample delivery drive mechanism is installed inside the sample delivery housing and can be raised and lowered via the second lifting mechanism. The sample delivery rod can be adjusted up and down in height via the second lifting mechanism.

[0010] As a further improvement of this utility model, the bottom of the stabilizing housing is provided with a groove corresponding to the position of the friction wheel, the upper part of the friction wheel contacts the sample feeding rod through the groove, and the axial direction of the friction wheel is perpendicular to the sliding direction of the sample feeding rod;

[0011] The two ends of the friction wheel are rotatably connected to the bottom ends of the stable housing, and are respectively linked to the clamping and limiting parts on the corresponding sides through a pneumatic transmission assembly.

[0012] As a further improvement of this utility model, the pneumatic transmission assembly includes an eccentric shaft, a rotating plate, a first air chamber, and a second air chamber.

[0013] Two first air chambers are respectively located on the bottom sides of the sample delivery shell. A piston is slidably installed in the first air chamber. The piston divides the interior of the first air chamber into a rod chamber and a rodless chamber. The rod chamber is provided with an air inlet, and the rodless chamber is provided with an air outlet.

[0014] Two second air chambers are respectively located on both sides of the sample delivery shell and are correspondingly clamped and limited. A movable rod is slidably installed in the second air chamber. The sliding direction of the movable rod is perpendicular to the sliding direction of the sample delivery rod. The extended end of the movable rod is connected to the clamping and limiting part. The air inlet of the second air chamber is connected to the rodless chamber of the first air chamber through an air passage.

[0015] The two ends of the friction wheel are connected to the corresponding rotating plates via the eccentric shaft, and the two rotating plates are respectively connected to the pistons of the first air chambers on the corresponding sides. When the friction wheel rotates, the eccentric shaft drives the piston to slide back and forth in the first air chamber through the rotating plates. The gas in the rodless chamber is compressed by the piston and enters the second air chamber and pushes the moving rod to slide. The moving rod drives the clamping and limiting part to move closer to the sample delivery rod and clamp it.

[0016] As a further improvement of this utility model, the clamping and limiting part includes an I-shaped mounting frame and a plurality of limiting wheels; the plurality of limiting wheels are arranged vertically between the upper and lower horizontal supports of the I-shaped mounting frame, and the plurality of limiting wheels are arranged sequentially along the sliding direction of the sample feeding rod; the vertical support of the I-shaped mounting frame is connected to the extended end of the moving rod.

[0017] As a further improvement of this utility model, the opening area of ​​the air inlet of the first air chamber is larger than the opening area of ​​the air outlet.

[0018] As a further improvement of this utility model, the second lifting mechanism includes a lifting housing and a first motor, a first gear, a second gear, a transmission groove, and a first threaded rod placed inside the lifting housing;

[0019] The lifting housing is fixedly installed on the inner top of the sample delivery housing. The first motor is fixed on one side inside the lifting housing. The output shaft of the first motor is connected to a vertically arranged first gear, which meshes with a horizontally arranged second gear. The second gear is rotatably connected to the lifting housing and fixedly connected to the transmission groove. The transmission groove is arranged vertically and has a first threaded rod screwed inside it. The bottom end of the first threaded rod extends out of the lifting housing and is connected to a mounting plate. The bottom of the mounting plate is connected to the sample delivery drive mechanism.

[0020] As a further improvement of this utility model, the second lifting mechanism also includes a limiting rod;

[0021] The mounting plate is symmetrically provided with limit rods on both sides of the lifting housing, and the limit rods are arranged in the vertical direction; the two sides of the lifting housing are provided with limit holes corresponding to the limit rods; the limit rods on both sides pass through the limit holes on the corresponding sides, and the ends of the limit rods on both sides are provided with anti-detachment parts to prevent the limit rods from coming out of the limit holes.

[0022] As a further improvement of this utility model, the sample delivery drive mechanism includes a sample delivery housing, a second threaded rod, a transmission plate, a limiting plate, a rotating wheel, and a second motor;

[0023] The sample delivery housing is connected to the second lifting mechanism. The second motor is fixedly installed on the sample delivery housing. The output end of the second motor is connected to one end of the second threaded rod in the horizontal direction. The other end of the second threaded rod is rotatably connected to a bracket.

[0024] The limiting plate spans between the sample delivery housing and the bracket, and the limiting plate is positioned above the second threaded rod. The laying direction of the limiting plate is parallel to the axial direction of the second threaded rod.

[0025] The two sides of the sample feeding rod are respectively threaded to the second threaded rod through the transmission plate, and the tops of the two transmission plates are respectively slidably connected to the two sides of the limiting plate through rollers.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0027] This invention, by setting up a linkage structure between the friction wheel and the pneumatic transmission component, and in conjunction with the clamping and limiting parts located on both sides inside the stable housing, can drive the friction wheel to rotate when the sample delivery rod slides. Then, the pneumatic transmission component drives the clamping and limiting parts to automatically approach and clamp the sample delivery rod. This effectively solves the problem of lateral displacement or shaking of the sample delivery rod caused by mechanical clearance and vibration, significantly improves the stability of the sample delivery process, avoids positional deviation of the ceramic boat, and ensures the accuracy of sample delivery.

[0028] This invention, by setting up a first lifting mechanism and a second lifting mechanism, in conjunction with a stable housing and a sample delivery drive mechanism, can achieve high-precision fine-tuning of the sample delivery rod in the vertical direction, meeting the stringent requirements of high-precision detection for sample position.

[0029] This invention reduces the need for manual calibration due to insufficient sample delivery stability by linking the friction wheel with the clamping and limiting part, and by setting up the first and second lifting mechanisms. It also reduces operational errors, improves the efficiency of automated testing, and ensures the accuracy and reliability of the sample delivery process without frequent manual intervention. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the sample delivery device of a sulfur analyzer disclosed in one embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the assembly structure of the stable housing and pneumatic transmission component of the sample delivery device of the sulfur analyzer disclosed in one embodiment of the present invention.

[0032] Figure 3 This is a schematic diagram of the pneumatic transmission assembly of the sample delivery device of a sulfur analyzer disclosed in one embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the second lifting mechanism of the sample delivery device of the sulfur analyzer disclosed in one embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the installation of the mounting plate and the limiting rod of the second lifting mechanism of the sample delivery device of the sulfur analyzer disclosed in one embodiment of the present invention.

[0035] Figure 6 This is a schematic diagram of the sample delivery drive mechanism of the sample delivery device of the sulfur analyzer disclosed in one embodiment of the present invention.

[0036] In the picture:

[0037] 1. Sample delivery housing; 11. Sample delivery channel opening; 2. Stabilizing housing; 3. Sample delivery rod; 4. Ceramic boat; 5. Sample delivery drive mechanism; 51. Sample delivery housing; 52. Second motor; 53. Second threaded rod; 54. Bracket; 55. Limiting plate; 56. Transmission plate; 57. Roller; 6. Second lifting mechanism; 61. Lifting housing; 611. Limiting hole; 62. First motor; 63. First gear; 64. Second gear; 65. Transmission groove; 66. First threaded rod; 67. Mounting plate; 68. Limiting rod; 681. Anti-detachment part; 7. Friction wheel; 8. Pneumatic transmission assembly; 81. Eccentric shaft; 82. Rotating plate; 83. First air chamber; 831. Air inlet; 832. Air outlet; 833. Piston; 84. Second air chamber; 841. Moving rod; 85. Air passage; 9. First lifting mechanism; 10. Clamping and limiting part; 101. I-shaped mounting bracket; 102. Limiting wheel. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0039] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] The present invention will now be described in further detail with reference to the accompanying drawings:

[0042] like Figure 1 As shown, a sample delivery device for a sulfur analyzer according to this utility model includes a sample delivery shell 1, a stabilizing shell 2, a sample delivery rod 3, a ceramic boat 4, a sample delivery drive mechanism 5, a second lifting mechanism 6, a friction wheel 7, a pneumatic transmission assembly 8, a first lifting mechanism 9, and a clamping and limiting part 10. One end of the sample delivery shell 1 is provided with a sample delivery channel 11. The stabilizing shell 2 is installed inside the sample delivery channel 11, which can be raised and lowered via the first lifting mechanism 9. A friction wheel 7 is provided at its bottom, and clamping and limiting parts 10 are provided on both sides of its interior. The friction wheel 7 is connected to the clamping and limiting part 10 via the pneumatic transmission assembly 8. The limiting part 10 is linked; the sample delivery rod 3 is set inside the sample delivery housing 1 and slides back and forth in the stable housing 2 in the horizontal direction through the sample delivery drive mechanism 5. A ceramic boat 4 is connected to one end of the sample delivery rod 3 near the sample delivery channel opening 11; the friction wheel 7 is in contact with the sample delivery rod 3 and rotates as the sample delivery rod 3 slides; the clamping limiting parts 10 on both sides move closer to the sample delivery rod 3 as the friction wheel 7 rotates and clamp and limit the sample delivery rod 3; the sample delivery drive mechanism 5 is installed in the sample delivery housing 1 and can be raised and lowered through the second lifting mechanism 6. The sample delivery height of the sample delivery rod 3 can be adjusted up and down through the second lifting mechanism 6.

[0043] Specifically,

[0044] like Figure 2-3 As shown, in the above embodiment, preferably, the bottom of the stabilizing housing 2 is provided with a groove corresponding to the position of the friction wheel 7, the upper part of the friction wheel 7 contacts the sample feeding rod 3 through the groove, and the axial direction of the friction wheel 7 is perpendicular to the sliding direction of the sample feeding rod 3; the two ends of the friction wheel 7 are respectively rotatably connected to the bottom ends of the stabilizing housing 2 through brackets, and are respectively linked to the clamping and limiting part 10 on the corresponding side through the pneumatic transmission assembly 8.

[0045] In the above embodiments, preferably, the first lifting mechanism 9 is a telescopic cylinder, the cylinder end of which is fixed to the upper part of the sample delivery channel 11, and the extended end of which is fixed to the upper part of the stabilizing housing 2.

[0046] In the above embodiment, preferably, the friction wheel 7 is disposed at the bottom of the side of the stabilizing housing 2 away from the sample delivery channel 11.

[0047] In the above embodiment, preferably, the pneumatic transmission assembly 8 includes an eccentric shaft 81, a rotating plate 82, a first air chamber 83, and a second air chamber 84. The two first air chambers 83 are respectively disposed on both sides of the bottom of the sample delivery housing 1. A piston 833 is slidably disposed inside the first air chamber 83, and the piston 833 divides the interior of the first air chamber into a rod chamber and a rodless chamber. The rod chamber is provided with an air inlet 831, and the rodless chamber is provided with an air outlet 832. The two second air chambers 84 are respectively disposed on both sides of the sample delivery housing 1 and are correspondingly provided with clamping and limiting parts 10. A moving rod 841 is slidably disposed inside the second air chamber 84, and the sliding direction of the moving rod 841 is perpendicular to the sliding direction of the sample delivery rod 3. The extended end of the moving rod 841 is connected to the clamping and limiting part 10; the air inlet of the second air chamber 84 is connected to the rodless chamber of the first air chamber 83 through the air passage 85; the two ends of the friction wheel 7 are connected to the corresponding rotating plate 82 via the eccentric shaft 81, and the two rotating plates 82 are respectively connected to the piston 833 of the corresponding first air chamber 83; when the friction wheel 7 rotates, the eccentric shaft 81 drives the piston 833 to slide back and forth in the first air chamber 83 through the rotating plate 82, and the gas in the rodless chamber is compressed by the piston 833 and enters the second air chamber 84 and pushes the moving rod 841 to slide. The moving rod 841 drives the clamping and limiting part 10 to move closer to the sample delivery rod 3 and clamp it.

[0048] In the above embodiment, preferably, the clamping and limiting part 10 includes an I-shaped mounting frame 101 and a plurality of limiting wheels 102; the plurality of limiting wheels 102 are arranged vertically between the upper and lower horizontal supports of the I-shaped mounting frame 101, and the plurality of limiting wheels 102 are arranged sequentially along the sliding direction of the sample feeding rod 3; the vertical support of the I-shaped mounting frame 101 is connected to the extended end of the moving rod 841.

[0049] In actual use, during sample delivery, the sample delivery rod 3 moves, causing the friction wheel 7 to rotate. The rotation of the friction wheel 7 drives the piston 833 to reciprocate inside the first air chamber 83, thereby continuously feeding gas from the first air chamber 83 into the second air chamber 84. The increased air pressure inside the second air chamber 84 causes the moving rod 841 to move, which in turn causes the limiting wheel 102 to be tightly pressed against both sides of the sample delivery rod 3 to limit its movement, ensuring the stability of the sample delivery rod 3 during sample delivery. The limiting wheels 102 are respectively set on both sides of the sample delivery rod 3, which can limit the sample delivery rod 3 from both sides. In this embodiment, the opening area of ​​the air inlet 831 of the first air chamber 83 is larger than the opening area of ​​the air outlet 832. The air outlet 832 can keep the air pressure inside the second air chamber 84 within a certain range.

[0050] like Figure 4As shown, in the above embodiment, preferably, the second lifting mechanism 6 includes a lifting housing 61 and a first motor 62, a first gear 63, a second gear 64, a transmission groove 65, and a first threaded rod 66 placed inside the lifting housing 61; wherein, the lifting housing 61 is fixedly installed on the inner top of the sample delivery housing 1, the first motor 62 is fixed on one side inside the lifting housing 61, the output shaft of the first motor 62 is connected to the vertically arranged first gear 63, the first gear 63 meshes with the horizontally arranged second gear 64; the second gear 64 is rotatably connected to the lifting housing 61 and fixedly connected to the transmission groove 65, the transmission groove 65 is arranged in a vertical direction, and the first threaded rod 66 is screwed into its interior; the bottom end of the first threaded rod 66 extends out of the lifting housing 61 and is connected to a mounting plate 67, the bottom of the mounting plate 67 is connected to the sample delivery drive mechanism 5.

[0051] like Figure 5 As shown, in the above embodiment, preferably, the second lifting mechanism 6 further includes a limiting rod 68; the mounting plate 67 is symmetrically provided with limiting rods 68 on both sides of the lifting housing 61, and the limiting rods 68 are arranged in the vertical direction; the two sides of the lifting housing 61 are provided with limiting holes 611 corresponding to the limiting rods 68; the two limiting rods 68 on both sides pass through the limiting holes 611 on the corresponding sides, and the ends of the two limiting rods 68 on both sides are provided with anti-detachment parts 681 to prevent the limiting rods 68 from falling out of the limiting holes 611.

[0052] In actual use, the first motor 62 inside the lifting housing 61 can be activated to drive the first gear 63 to rotate. The rotation of the first gear 63 drives the meshing second gear 64 to rotate, and the rotation of the second gear 64 drives the fixedly connected transmission groove 65 to rotate. The rotation of the transmission groove 65 drives the threaded first threaded rod 66 to move, and the movement of the first threaded rod 66 drives the mounting plate 67 to move up and down, thereby controlling the ceramic boat 4 to make fine adjustments in the vertical direction. Moreover, during the movement of the mounting plate 67, the limiting rods 68 slidably connected to both sides of the lifting housing 61 can effectively ensure the stability of the mounting plate 67 during the movement, improving the stability during the adjustment process.

[0053] like Figure 6As shown, in the above embodiment, preferably, the sample delivery drive mechanism 5 includes a sample delivery housing 51, a second threaded rod 53, a transmission plate 56, a limiting plate 55, a rotating wheel 57, a second motor 52, and a bracket 54; wherein, the sample delivery housing 51 is connected to the second lifting mechanism 6. In this embodiment, the sample delivery housing 51 is connected to the mounting plate 67 of the second lifting mechanism 6. The second motor 52 is fixedly installed on the sample delivery housing 51. The output end of the second motor 52 is connected to one end of the second threaded rod 53 in a horizontal direction, and the other end of the second threaded rod 53 is rotatably connected to the bracket 54; the limiting plate 55 spans between the sample delivery housing 51 and the bracket 54, and the limiting plate 55 is positioned above the second threaded rod 53. The laying direction of the limiting plate 55 is parallel to the axial direction of the second threaded rod 53; both sides of the sample delivery rod 3 are threadedly connected to the second threaded rod 53 through the transmission plate 56, and the tops of the two transmission plates 56 are slidably connected to both sides of the limiting plate 55 through rollers 57.

[0054] In actual use, starting the second motor 52 can drive the second threaded rod 53 to rotate. The rotation of the second threaded rod 53 drives the threaded transmission plate 56 to move. The movement of the transmission plate 56 can drive the fixedly connected sample feeding rod 3 to move. During the movement of the transmission plate 56, the roller 57 set on the upper part can slide synchronously along both sides of 55, thereby effectively improving the stability of the sample feeding rod 3 during the sample feeding process.

[0055] In the above embodiment, preferably, in order to achieve effective protection of the sample delivery drive mechanism 5, the mounting plate 67 in this embodiment is "π" shaped, and the sample delivery drive mechanism 5 is wrapped inside the "π" shaped mounting plate 67.

[0056] Advantages of this utility model:

[0057] This invention, by setting up a linkage structure between the friction wheel 7 and the pneumatic transmission component 8, and in conjunction with the clamping and limiting parts 10 located on both sides inside the stable housing 2, can drive the friction wheel 7 to rotate when the sample delivery rod 3 slides. Then, the pneumatic transmission component 8 drives the clamping and limiting parts 10 to automatically approach and clamp the sample delivery rod 3. This effectively solves the problem of lateral displacement or shaking of the sample delivery rod 3 caused by mechanical clearance and vibration, significantly improves the stability of the sample delivery process, avoids positional deviation of the ceramic boat 4, and ensures the accuracy of sample delivery.

[0058] This utility model, by setting up a first lifting mechanism 9 and a second lifting mechanism 6, together with a stable housing 2 and a sample delivery drive mechanism 5, can achieve high-precision fine adjustment of the sample delivery rod 3 in the vertical direction, meeting the stringent requirements of high-precision detection for sample position.

[0059] This invention reduces the need for manual calibration due to insufficient sample delivery stability by linking the friction wheel 7 with the clamping and limiting part 10, and by setting up the first and second lifting mechanisms. This reduces operational errors, improves the efficiency of automated testing, and ensures the accuracy and reliability of the sample delivery process without frequent manual intervention.

[0060] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sample feeding device for a sulfur tester, characterized by comprising: include: The sample delivery casing has a sample delivery channel opening at one end; A stable housing, which is installed in the sample delivery channel opening and can be raised and lowered by a first lifting mechanism; The bottom of the inner part is provided with a friction wheel, and the two sides of the inner part are provided with clamping and limiting parts. The friction wheel is linked to the clamping and limiting parts through a pneumatic transmission component. A sample delivery rod is disposed inside the sample delivery housing and slides back and forth horizontally within the stable housing via a sample delivery drive mechanism. A ceramic boat is connected to one end of the sample delivery rod near the sample delivery channel opening. The friction wheel contacts the sample delivery rod and rotates as the sample delivery rod slides. The clamping and limiting parts on both sides move closer to the sample delivery rod as the friction wheel rotates and clamp and limit the sample delivery rod. The sample delivery drive mechanism is installed inside the sample delivery housing and can be raised and lowered via the second lifting mechanism. The sample delivery rod can be adjusted up and down in height via the second lifting mechanism.

2. The sample delivery device of claim 1, wherein The bottom of the stabilizing housing is provided with a groove corresponding to the position of the friction wheel. The upper part of the friction wheel contacts the sample feeding rod through the groove. The axial direction of the friction wheel is perpendicular to the sliding direction of the sample feeding rod. The two ends of the friction wheel are rotatably connected to the bottom ends of the stable housing, and are respectively linked to the clamping and limiting parts on the corresponding sides through a pneumatic transmission assembly.

3. The sample delivery device of claim 2, wherein, The pneumatic transmission assembly includes an eccentric shaft, a rotating plate, a first air chamber, and a second air chamber. Two first air chambers are respectively located on the bottom sides of the sample delivery shell. A piston is slidably installed in the first air chamber. The piston divides the interior of the first air chamber into a rod chamber and a rodless chamber. The rod chamber is provided with an air inlet, and the rodless chamber is provided with an air outlet. Two second air chambers are respectively located on both sides of the sample delivery shell and are correspondingly clamped and limited. A movable rod is slidably installed in the second air chamber. The sliding direction of the movable rod is perpendicular to the sliding direction of the sample delivery rod. The extended end of the movable rod is connected to the clamping and limiting part. The air inlet of the second air chamber is connected to the rodless chamber of the first air chamber through an air passage. The two ends of the friction wheel are connected to the corresponding rotating plates via the eccentric shaft, and the two rotating plates are respectively connected to the pistons of the first air chambers on the corresponding sides. When the friction wheel rotates, the eccentric shaft drives the piston to slide back and forth in the first air chamber through the rotating plates. The gas in the rodless chamber is compressed by the piston and enters the second air chamber and pushes the moving rod to slide. The moving rod drives the clamping and limiting part to move closer to the sample delivery rod and clamp it.

4. The sample delivery device of claim 3, wherein The clamping and limiting part includes an I-shaped mounting frame and multiple limiting wheels; the multiple limiting wheels are arranged vertically between the upper and lower horizontal supports of the I-shaped mounting frame, and the multiple limiting wheels are arranged sequentially along the sliding direction of the sample feeding rod; the vertical support of the I-shaped mounting frame is connected to the extended end of the moving rod.

5. The sample delivery device of claim 3, wherein, The opening area of ​​the air inlet of the first air chamber is larger than the opening area of ​​the air outlet.

6. The sample delivery device of claim 1, wherein, The second lifting mechanism includes a lifting housing and a first motor, a first gear, a second gear, a transmission groove, and a first threaded rod disposed within the lifting housing; The lifting housing is fixedly installed on the inner top of the sample delivery housing. The first motor is fixed on one side inside the lifting housing. The output shaft of the first motor is connected to a vertically arranged first gear, which meshes with a horizontally arranged second gear. The second gear is rotatably connected to the lifting housing and fixedly connected to the transmission groove. The transmission groove is arranged vertically and has a first threaded rod screwed inside it. The bottom end of the first threaded rod extends out of the lifting housing and is connected to a mounting plate. The bottom of the mounting plate is connected to the sample delivery drive mechanism.

7. The sample delivery device of claim 6, wherein The second lifting mechanism also includes a limit rod; The mounting plate is symmetrically provided with limit rods on both sides of the lifting housing, and the limit rods are arranged in the vertical direction; the two sides of the lifting housing are provided with limit holes corresponding to the limit rods; the limit rods on both sides pass through the limit holes on the corresponding sides, and the ends of the limit rods on both sides are provided with anti-detachment parts to prevent the limit rods from coming out of the limit holes.

8. The sample delivery device of claim 1, wherein, The sample delivery drive mechanism includes a sample delivery housing, a second threaded rod, a transmission plate, a limiting plate, a rotating wheel, and a second motor; The sample delivery housing is connected to the second lifting mechanism. The second motor is fixedly installed on the sample delivery housing. The output end of the second motor is connected to one end of the second threaded rod in the horizontal direction. The other end of the second threaded rod is rotatably connected to a bracket. The limiting plate spans between the sample delivery housing and the bracket, and the limiting plate is positioned above the second threaded rod. The laying direction of the limiting plate is parallel to the axial direction of the second threaded rod. The two sides of the sample feeding rod are respectively threaded to the second threaded rod through the transmission plate, and the tops of the two transmission plates are respectively slidably connected to the two sides of the limiting plate through rollers.

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