A TOC analyzer capable of stable and uniform sampling

Abstract

The present invention discloses a TOC analyzer capable of stable and uniform sampling, comprising an analyzer housing, a centrifugal clamping mechanism, a telescopic driving mechanism and a positioning mechanism. An equipment mounting plate is provided inside the analyzer housing, and a connecting seat is fixed on one side of the equipment mounting plate inside the analyzer housing. A telescopic device is installed on the connecting seat. The telescopic device can be a pneumatic telescopic rod or an electric telescopic rod. The upper end of the telescopic part of the telescopic device is fixedly connected to the tail end of the lower surface of the support plate, and a suction tube is installed at the head end of the lower surface of the support plate. The invention can facilitate the shaking of samples in the sampling tube, avoid sedimentation during sampling, and cause large errors in subsequent experimental data. In addition, it can correct the lower ring plate and the upper ring plate, avoid long-term use, and cause the position of the lower ring plate and the upper ring plate to deviate, thereby causing the sampling tube to be unable to stably extend into the sampling tube for sampling.

Description

Technical Field

[0001] The invention relates to the technical field of TOC analyzers, in particular to a TOC analyzer capable of stably and evenly sampling. Background Art

[0002] TOC analyzer is a device for measuring total organic carbon in aqueous solution. TOC is a comprehensive indicator of the total amount of organic matter in water body expressed by carbon content. It can reflect the total amount of organic matter and is of great significance for evaluating the degree of organic pollution in water body. Traditional BOD5 or COD organic matter detection methods have some limitations, while TOC determination adopts combustion method, which can oxidize all organic matter and has certain advantages. According to different working principles, TOC analyzer can be divided into combustion oxidation-non-dispersive infrared absorption method, conductivity method, gas chromatography, etc. Combustion oxidation-non-dispersive infrared absorption method only needs one-time conversion, and has the advantages of simple process, good reproducibility and high sensitivity, and is widely used.

[0003] The existing TOC analyzer can automatically perform sampling and testing without human supervision during use, which relies on the automatic sampler structure on the TOC analyzer, which can automatically perform sampling and testing, thus eliminating the need for staff to constantly supervise;

[0004] However, there are still some problems when the existing TOC analyzer performs automatic sampling without supervision, such as:

[0005] 1. When the existing TOC analyzer is automatically sampling, the sample in the sampling tube at the rear position needs a long time before being sampled, which easily causes precipitation in it, especially for water samples with serious pollution. If the sample with precipitation is sampled, it will cause uneven sampling, which will cause a large error between the subsequent experimental data and the actual data;

[0006] 2. In the process of automatic sampling of the existing TOC analyzer, due to unattended operation and long-term use of the automatic sampling equipment, the sampling pipette may not be able to stably extend into the corresponding sample tube for sampling, resulting in the inability to perform stable sampling without supervision;

[0007] Therefore, a TOC analyzer capable of stable and uniform sampling is needed to solve the above problems. Summary of the invention

[0008] The object of the present invention is to provide a TOC analyzer capable of stable and uniform sampling, so as to solve the problem in the above background technology that the existing TOC analyzer cannot perform stable and uniform automatic sampling when in use without supervision.

[0009] To achieve the above object, the present invention provides the following technical solutions:

[0010] A TOC analyzer capable of stable and uniform sampling comprises an analyzer housing, a centrifugal clamping mechanism, a telescopic driving mechanism and a positioning mechanism. An equipment mounting plate is arranged inside the analyzer housing, and a connecting seat is fixed on one side of the equipment mounting plate in the analyzer housing. A telescopic device is installed on the connecting seat. The telescopic device can be a pneumatic telescopic rod or an electric telescopic rod. The upper end of the telescopic part of the telescopic device is fixedly connected to the tail end of the lower surface of a support plate, and a suction tube is installed at the head end of the lower surface of the support plate. A pump body is arranged at the end of the suction tube and is connected to a detection component on the other side of the equipment mounting plate.

[0011] Furthermore, a rotating power source is also installed on the connecting seat, and the rotating power source can be a servo motor. The shaft end of the rotating power source is coaxially fixedly connected to the lower surface of the lower ring plate, and the upper surface of the lower ring plate is connected to the upper ring plate through a supporting column. The lower ring plate and the upper ring plate are coaxially arranged, and their outer diameters are the same. The lower ring plate and the upper ring plate are both provided with through holes penetrating the upper and lower sides thereof, and the through holes are evenly distributed at equal angles on the lower ring plate and the upper ring plate. A centrifugal clamping mechanism is provided between the lower ring plate and the upper ring plate, and the centrifugal clamping mechanism is connected to the support plate through a telescopic driving mechanism. The support plate, the lower ring plate and the upper ring plate are positioned by a positioning mechanism, and the bearing in the through hole on the lower ring plate is connected to a support bracket, and the upper surface of the support bracket is a smooth concave shape.

[0012] The above technical solution facilitates the intermittent rotation of the connecting seat, thereby realizing automatic sampling and testing when no one is watching, facilitating the support to support the sampling test tube and ensuring that the sampling test tube can rotate stably.

[0013] Furthermore, the centrifugal clamping mechanism includes an upper part of a support ring, a reserved cavity, a clamping plate, a lower part of a support ring, a through hole, an arm, a gravity ball and a mounting frame, the upper part of the support ring and the lower part of the support ring are coaxially connected, the outer diameter of the upper part of the support ring is larger than the outer diameter of the lower part of the support ring, the inner diameter of the upper part of the support ring is smaller than the inner diameter of the lower part of the support ring, the outer bearing of the lower part of the support ring is connected to the middle part of the mounting frame, and the mounting frame is fixedly connected between two adjacent support columns, the upper part of the upper part of the support ring is provided with a reserved cavity, and the reserved cavity is penetrated to the inner side of the upper part of the support ring through the through hole, the inner shaft of the through hole is connected with an arm, one end of the arm extends into the reserved cavity, and the other end extends to the inner side of the upper part of the support ring, one end of the arm extending into the reserved cavity is provided with a gravity ball, and the other end of the arm extending to the inner side of the upper part of the support ring is installed with a clamping plate, and the structure composed of the clamping plate, the through hole, the arm and the gravity ball are provided in three groups at equal angles on each upper part of the support ring.

[0014] By adopting the above technical solution, the upper part and the lower part of the upper support ring of the centrifugal clamping mechanism can rotate at high speed, so that the gravity ball drives the arm to rotate under the action of centrifugal force, so that the arm gradually rotates to a level approaching. When the arm rotates, the splint connected to it will gradually clamp the sampling test tube, and the subsequent rotation of the upper part of the upper support ring will drive the sampling test tube to rotate synchronously, thereby avoiding sample sedimentation in the sampling test tube, thereby avoiding large errors in the test data.

[0015] Furthermore, the longitudinal section of the clamping plate is a right-angled trapezoid, and its inclined surface is tilted downward, and the side surfaces of the short sides of the clamping plate are made of rubber anti-slip material.

[0016] By adopting the above technical solution, by limiting the shape of the splint, the sampling test tube can be conveniently placed in the through hole, and by limiting the material of the short side of the splint, the splint can stably clamp the sampling test tube and drive the sampling test tube to rotate.

[0017] Furthermore, the rotation position of the arm is longer than the position where the arm is connected to one end of the gravity ball, and when the arm is in a natural state, the height of the gravity ball is lower than the height of the clamping plate.

[0018] By adopting the above technical solution, the clamp can be kept away from the sampling tube in a natural state, thereby preventing the sampling tube from being clamped, so as to facilitate the placement of the tube in the through hole in the early stage and the removal of the sampling tube from the through hole in the later stage.

[0019] Furthermore, the telescopic drive mechanism includes a follower sleeve, a ratchet gear sleeve, a follower gear, a transmission rod and a support sleeve, the upper end of the transmission rod is fixedly connected to the lower surface of the support plate, and the lower end of the transmission rod movably extends into the inner side of the follower sleeve, the lower bearing of the follower sleeve is connected to the inner side of the support sleeve, and the lower end of the support sleeve is connected to the connecting seat, the upper outer side of the follower sleeve is keyed to the ratchet gear sleeve, and the ratchet gear sleeve is meshed with the follower gear, and the follower gear key is connected to the outer side of the upper part of the support ring.

[0020] By adopting the above technical solution, the movement of the transmission rod can drive the follower sleeve to rotate, thereby achieving the purpose of driving the ratchet gear sleeve to rotate synchronously, so that the follower gear can drive the upper part of the support ring to rotate. In addition, the ratchet gear sleeve is set as a ratchet, which can facilitate engagement with the follower gear.

[0021] Furthermore, the tooth number ratio between the ratchet gear sleeve and the follower gear is not less than 3, and the thickness of the ratchet gear sleeve is greater than the thickness of the follower gear.

[0022] By adopting the above technical solution, by setting the tooth ratio of the ratchet gear sleeve and the follower gear, the speed at which the follower gear drives the upper part of the support ring to rotate can be increased, so that the upper part of the support ring can rotate at a high speed, thereby realizing the gradual upward movement of the gravity ball driven by centrifugal force.

[0023] Furthermore, the inner side of the outer follower sleeve of the transmission rod is provided with mutually matching twist threads, and the transmission rod is arranged between the telescopic device and the suction tube.

[0024] By adopting the above technical solution and providing the twisted thread, the transmission rod can be moved to drive the follower sleeve to rotate, thereby achieving stable operation of the telescopic drive mechanism.

[0025] Furthermore, the positioning mechanism includes a positioning notch and a positioning rod. The positioning notch is provided on both the lower ring plate and the upper ring plate, and the corresponding positioning rod is installed on the lower surface of the support plate. The two positioning rods are respectively provided on both sides of the suction tube.

[0026] By adopting the above technical solution, the positioning rod can be moved to the corresponding positioning notch, thereby achieving positioning and ensuring that the suction tube stably extends into the sampling tube for sampling.

[0027] Furthermore, the positioning notch is a partial truncated cone, and the minimum diameter of the positioning notch matches the diameter of the positioning rod, and the height of the lower end of the positioning rod is lower than the height of the lower end of the suction tube.

[0028] By adopting the above technical scheme, it is possible to facilitate the setting of the shape of the positioning notch so that even if the positions of the lower ring plate and the upper ring plate are slightly deviated, the shape of the positioning notch can be used to correct the positions of the lower ring plate and the upper ring plate during the movement of the positioning rod toward the positioning notch, thereby achieving the purpose of stable TOC sampling.

[0029] Compared with the prior art, the beneficial effects of the present invention are: the TOC analyzer capable of stable and uniform sampling can facilitate the shaking of the sample in the sampling tube, avoiding sedimentation during sampling, which causes large errors in subsequent experimental data, and can also correct the lower ring plate and the upper ring plate, avoiding long-term use, which causes the position deviation of the lower ring plate and the upper ring plate, thereby causing the sampling tube to be unable to stably extend into the sampling tube for sampling:

[0030] 1. The suction tube is driven downward by the telescopic device, so that the suction tube is extended into the sampling tube for sampling. In this process, the transmission rod will also move relative to the follower sleeve, thereby driving the follower sleeve to rotate, so that the ratchet gear sleeve on its outer side drives the follower gear to rotate, and the follower gear drives the upper part of the support ring to rotate at a high speed by using the gear ratio, and then the centrifugal force principle can be used to gradually move the gravity ball upward, so that the arm rod is deflected, so that the splint clamps the sampling tube, and the sampling tube rotates at a high speed with the upper part of the support ring, so as to shake the sample in the sampling tube evenly, avoid sedimentation of the sample in the sampling tube, and facilitate uniform sampling;

[0031] 2. When the telescopic device drives the suction tube to move downward, the positioning rod will first enter the corresponding positioning notch and gradually penetrate the smallest diameter end of the positioning notch, so that the positioning rod and the positioning notch can correct the position of the lower ring plate and the upper ring plate to avoid deviation between the two, which will cause the suction tube to be unable to stably extend into the sampling tube for sampling. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0033] Figure 2 It is a schematic diagram of a partial cross-sectional structure of the present invention;

[0034] Figure 3 It is a schematic diagram of the southwest isometric structure of the connection seat and the support plate of the present invention;

[0035] Figure 4 This is a schematic diagram of the front view of the connection between the connection seat and the support plate of the present invention;

[0036] Figure 5 This is a schematic diagram of the cross-sectional structure of the connection between the connection seat and the support plate of the present invention;

[0037] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure of point A;

[0038] Figure 7 It is a schematic diagram of the cross-sectional structure of the connection between the upper part of the support ring and the lower part of the support ring of the present invention;

[0039] Figure 8 For the present invention Figure 7 A schematic diagram of the enlarged structure of point B in the middle;

[0040] Fig. 9 It is a schematic diagram of the connection structure between the follower sleeve and the upper part of the support ring of the present invention.

[0041] In the figure: 1. Analyzer housing; 2. Equipment mounting plate; 3. Connecting seat; 4. Telescopic device; 5. Support plate; 6. Lower ring plate; 7. Upper ring plate; 8. Through hole; 9. Positioning notch; 10. Support column; 11. Rotating power source; 12. Support sleeve; 13. Transmission rod; 14. Suction tube; 15. Positioning rod; 16. Follow-up sleeve; 17. Ratchet gear sleeve; 18. Follow-up gear; 19. Upper part of support ring; 20. Reserved cavity; 21. Clamp; 22. Lower part of support ring; 23. Through hole; 24. Arm; 25. Gravity ball; 26. Support bracket; 27. Mounting frame. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] See also Figure 1-9 , the present invention provides a technical solution:

[0044] Embodiment 1:

[0045] In order to solve the problem of uneven sampling caused by precipitation in the sampling test tube, resulting in errors in subsequent test data, the following technical solutions are provided, specifically,

[0046] A TOC analyzer capable of stable and uniform sampling comprises an analyzer housing 1, a centrifugal clamping mechanism, a telescopic driving mechanism and a positioning mechanism. An equipment mounting plate 2 is arranged inside the analyzer housing 1, and a connecting seat 3 is fixed to one side of the equipment mounting plate 2 in the analyzer housing 1. A telescopic device 4 is installed on the connecting seat 3. The telescopic device 4 can be a pneumatic telescopic rod or an electric telescopic rod. The upper end of the telescopic part of the telescopic device 4 is fixedly connected to the rear end of the lower surface of a support plate 5, and a suction tube 14 is installed at the head end of the lower surface of the support plate 5. A pump body is arranged at the end of the suction tube 14 and is connected to a detection component on the other side of the equipment mounting plate 2. A rotating power source 11 is also installed on the connecting seat 3. The rotating power source 1 1 can be a servo motor, the shaft end of the rotating power source 11 is coaxially fixedly connected to the lower surface of the lower ring plate 6, and the upper surface of the lower ring plate 6 is connected to the upper ring plate 7 through the support column 10, the lower ring plate 6 and the upper ring plate 7 are coaxially arranged, and the outer diameters of the two are the same, and the lower ring plate 6 and the upper ring plate 7 are both provided with through holes 8 penetrating the upper and lower sides thereof, and the through holes 8 are evenly distributed at equal angles on the lower ring plate 6 and the upper ring plate 7, and a centrifugal clamping mechanism is provided between the lower ring plate 6 and the upper ring plate 7, and the centrifugal clamping mechanism is connected to the support plate 5 through a telescopic driving mechanism, and the centrifugal clamping mechanism includes a support ring upper part 19, a reserved cavity 20, a clamping plate 21, a support ring lower part 22, and a through hole 2 3. Arm 24, gravity ball 25 and mounting frame 27. The support ring upper part 19 and the support ring lower part 22 are coaxially connected. The outer diameter of the support ring upper part 19 is larger than the outer diameter of the support ring lower part 22, and the inner diameter of the support ring upper part 19 is smaller than the inner diameter of the support ring lower part 22. The outer bearing of the support ring lower part 22 is connected to the middle part of the mounting frame 27, and the mounting frame 27 is fixedly connected between two adjacent support columns 10. The upper part of the support ring upper part 19 is provided with a reserved cavity 20, and the reserved cavity 20 penetrates to the inner side of the support ring upper part 19 through the through hole 23. The arm 24 is connected to the inner axis of the through hole 23. One end of the arm 24 extends into the reserved cavity 20, and the other end extends to the inner side of the support ring upper part 19. One end of the arm 24 extending into the reserved cavity 20 is provided with a gravity ball 25, and the other end of the arm 24 extending to the inner side of the upper portion 19 of the support ring is installed with a clamping plate 21. The structure composed of the clamping plate 21, the through hole 23, the arm 24 and the gravity ball 25 is provided with 3 groups at equal angles on each upper portion 19 of the support ring. When in use, through the high-speed rotation of the upper portion 19 of the support ring, the centrifugal force principle can be utilized to make the gravity ball 25 drive the arm 24 to rotate, so that the clamping plate 21 gradually clamps the sampling test tube, and then the sampling test tube can be synchronously rotated with the upper portion 19 of the support ring, so as to avoid the precipitation of the sampling test tube placed in the upper portion 19 of the support ring, so that the sampling can be uniformly sampled, and the accuracy of the subsequent test data can be ensured;The longitudinal section of the clamping plate 21 is a right-angled trapezoid, and its inclined surface is tilted downward. The side surface of the short side of the clamping plate 21 is made of rubber anti-skid material. Through the right-angled trapezoid and the clamping plate 21 made of rubber anti-skid material, the clamping plate 21 can be kept at a certain distance from the sampling test tube in a natural state, ensuring that the sampling test tube can be smoothly taken and placed, and after the gravity ball 25 drives the arm 24 to rotate, the clamping plate 21 can stably clamp the sampling test tube, ensuring that the sampling test tube can rotate synchronously with the upper part 19 of the support ring; the rotation position of the arm 24 is longer than the position where it is connected to one end of the gravity ball 25, and in the natural state of the arm 24, the height of the gravity ball 25 is lower than the height of the clamping plate 21, so that when the upper part 19 of the support ring does not rotate, there is a distance between the clamping plate 21 and the sampling test tube, which is conducive to the taking and placement of the sampling test tube;

[0047] The telescopic driving mechanism includes a follower sleeve 16, a ratchet gear sleeve 17, a follower gear 18, a transmission rod 13 and a support sleeve 12. The upper end of the transmission rod 13 is fixedly connected to the lower surface of the support plate 5, and the lower end of the transmission rod 13 movably extends into the inner side of the follower sleeve 16. The lower bearing of the follower sleeve 16 is connected to the inner side of the support sleeve 12, and the lower end of the support sleeve 12 is connected to the connecting seat 3. The upper outer side of the follower sleeve 16 is keyed to the ratchet gear sleeve 17, and the ratchet gear sleeve 17 is meshed and connected with the follower gear 18. The follower gear 18 is keyed to the outer side of the upper part 19 of the support ring. When in use, the transmission rod 13 moves downward with the suction tube 14, driving the follower sleeve 16 threadedly connected thereto to rotate, thereby causing the follower sleeve 16 to pass through the ratchet gear sleeve on its outer side. 17 drives the follower gear 18 to rotate, thereby achieving the purpose of driving the upper part 19 of the support ring to rotate, and then achieving the purpose of using the gravity ball 25 to drive the arm rod 24 to rotate; the tooth number ratio of the ratchet gear sleeve 17 and the follower gear 18 is not less than 3, and the thickness of the ratchet gear sleeve 17 is greater than the thickness of the follower gear 18. The tooth number ratio is used to achieve the purpose of the ratchet gear sleeve 17 driving the follower gear 18 to rotate at a high speed, thereby making the upper part 19 of the support ring rotate at a high speed, and then making the centrifugal force of the gravity ball 25 greater than its gravity; the inner side of the follower sleeve 16 on the outside of the transmission rod 13 is provided with mutually matching twist threads, and the transmission rod 13 is arranged between the telescopic device 4 and the suction tube 14, so that when the transmission rod 13 moves vertically relative to the follower sleeve 16, the follower sleeve 16 rotates.

[0048] Embodiment 2: To solve the problem that the positions of the sampling tube and the suction tube do not correspond to each other due to the long-term use of components such as the servo motor, so that the suction tube cannot stably extend into the sampling tube for sampling, the following technical solution is provided, specifically,

[0049] The support plate 5, the lower ring plate 6 and the upper ring plate 7 are positioned by a positioning mechanism, and the through hole 8 on the lower ring plate 6 is connected to a support bracket 26 with a bearing. The positioning mechanism includes a positioning notch 9 and a positioning rod 15. The positioning notch 9 is provided on both the lower ring plate 6 and the upper ring plate 7, and the corresponding positioning rods 15 are installed on the lower surface of the support plate 5. The two positioning rods 15 are respectively provided on both sides of the suction tube 14. When in use, when the suction tube 14 moves downward, the positioning rods 15 move downward synchronously, and the lower end height of the positioning rods 15 is lower than the lower end height of the suction tube 14, so that the positioning rods 15 are gradually extended into the corresponding positioning notch 9 first, and the structural shape of the positioning notch 9 is used, so that when the positioning rod 15 passes through the minimum diameter end of the positioning notch 9, the positions of the lower ring plate 6 and the upper ring plate 7 can be corrected to ensure that the suction tube 14 can stably extend into the sampling test tube for taking. The positioning notch 9 is a part of a truncated cone, and the minimum diameter of the positioning notch 9 matches the diameter of the positioning rod 15. The height of the lower end of the positioning rod 15 is lower than the height of the lower end of the suction tube 14, which can facilitate the positioning rod 15 to move down to the height of the positioning notch 9 before the suction tube 14, and can facilitate the positioning rod 15 to enter the positioning notch 9, and then use the positioning rod 15 to penetrate the lower end of the positioning notch 9 and the end with the smallest diameter, so as to correct the position of the lower ring plate 6 and the upper ring plate 7; the upper surface of the support bracket 26 is a smooth concave shape, and the structural shape of the support bracket 26 is set to facilitate holding the sampling tube and facilitating the rotation of the sampling tube. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A TOC analyzer capable of stable and uniform sampling, comprising an analyzer housing (1), a centrifugal clamping mechanism, a telescopic driving mechanism and a positioning mechanism, characterized in that: The analyzer housing (1) is provided with a device mounting plate (2) inside, and a connecting seat (3) is fixed to one side of the device mounting plate (2) inside the analyzer housing (1). A telescopic device (4) is mounted on the connecting seat (3). The telescopic device (4) may be a pneumatic telescopic rod or an electric telescopic rod. A rotating power source (11) is also mounted on the connecting seat (3). The rotating power source (11) may be a servo motor. The shaft end of the rotating power source (11) is coaxially fixedly connected to the lower surface of the lower ring plate (6). The upper surface of the lower ring plate (6) is connected to the upper ring plate (7) via a supporting column (10). The lower ring plate (6) and the upper ring plate (7) are coaxially arranged. The two have the same outer diameter. The lower ring plate (6) and the upper ring plate (7) are coaxially arranged. The lower ring plate (7) is provided with through holes (8) penetrating the upper and lower sides thereof, and the through holes (8) are evenly distributed at equal angles on the lower ring plate (6) and the upper ring plate (7). A centrifugal clamping mechanism is provided between the lower ring plate (6) and the upper ring plate (7), and the centrifugal clamping mechanism is connected to the support plate (5) through a telescopic driving mechanism. The centrifugal clamping mechanism comprises a support ring upper part (19), a reserved cavity (20), a clamping plate (21), a support ring lower part (22), a through hole (23), an arm (24), a gravity ball (25) and a mounting frame (27). The support ring upper part (19) and the support ring lower part (22) are coaxially connected, the outer diameter of the support ring upper part (19) is greater than the outer diameter of the support ring lower part (22), and the support ring upper part ( The inner diameter of the support ring lower part (19) is smaller than the inner diameter of the support ring lower part (22), the outer bearing of the support ring lower part (22) is connected to the middle part of the mounting frame (27), and the mounting frame (27) is fixedly connected between two adjacent support columns (10), the upper part of the support ring upper part (19) is provided with a reserved cavity (20), and the reserved cavity (20) is connected to the inner side of the support ring upper part (19) through a through hole (23), the inner axis of the through hole (23) is connected to an arm rod (24), one end of the arm rod (24) extends into the reserved cavity (20), and the other end extends out of the inner side of the support ring upper part (19), one end of the arm rod (24) extending into the reserved cavity (20) is provided with a gravity ball (25), and the arm rod (24) extending to the inner side of the support ring upper part (19) is provided with a gravity ball (25). 24) is provided with a clamping plate (21) at the other end, and the structure composed of the clamping plate (21), the through hole (23), the arm (24) and the gravity ball (25) is provided with three groups at equal angles on the upper part (19) of each support ring, the support plate (5), the lower ring plate (6) and the upper ring plate (7) are positioned by a positioning mechanism, and the through hole (8) on the lower ring plate (6) is connected to a support bracket (26) through a bearing, and the upper surface of the support bracket (26) is a smooth concave shape, the upper end of the telescopic part of the telescopic device (4) is fixedly connected to the tail end of the lower surface of the support plate (5), and the head end of the lower surface of the support plate (5) is provided with a suction pipe (14), and the end of the suction pipe (14) is provided with a pump body connected to the detection component on the other side of the device mounting plate (2),The telescopic drive mechanism comprises a follower sleeve (16), a ratchet gear sleeve (17), a follower gear (18), a transmission rod (13) and a support sleeve (12); the upper end of the transmission rod (13) is fixedly connected to the lower surface of the support plate (5), and the lower end of the transmission rod (13) movably extends into the inner side of the follower sleeve (16); the inner side of the follower sleeve (16) outside the transmission rod (13) is provided with mutually matching twist threads, and the transmission rod (13) is arranged between the telescopic device (4) and the suction tube (14); the lower bearing of the follower sleeve (16) is connected to the inner side of the support sleeve (12), and the lower end of the support sleeve (12) is connected to the connecting seat (3); the upper outer side of the follower sleeve (16) is key-connected with the ratchet gear sleeve (17), and the ratchet gear sleeve (17) is meshedly connected with the follower gear (18), and the follower gear (18) is key-connected to the outer side of the upper part (19) of the support ring. , 2. A TOC analyzer capable of stable and uniform sampling according to claim 1, characterized in that: The longitudinal section of the clamping plate (21) is a right-angled trapezoid, and its inclined surface is arranged to be tilted downward, and the side surface of the short side of the clamping plate (21) is made of rubber anti-slip material.

3. A TOC analyzer capable of stable and uniform sampling according to claim 2, characterized in that: The rotation position of the arm (24) is longer than the position where one end of the arm (24) is connected to the gravity ball (25), and when the arm (24) is in a natural state, the height of the gravity ball (25) is lower than the height of the clamping plate (21).

4. A TOC analyzer capable of stable and uniform sampling according to claim 3, characterized in that: The tooth number ratio between the ratchet gear sleeve (17) and the follower gear (18) is not less than 3, and the thickness of the ratchet gear sleeve (17) is greater than the thickness of the follower gear (18).

5. A TOC analyzer capable of stable and uniform sampling according to claim 4, characterized in that: The positioning mechanism comprises a positioning notch (9) and a positioning rod (15); the positioning notch (9) is provided on both the lower ring plate (6) and the upper ring plate (7); and the corresponding positioning rod (15) is installed on the lower surface of the support plate (5); and the two positioning rods (15) are respectively provided on both sides of the suction tube (14).

6. A TOC analyzer capable of stable and uniform sampling according to claim 5, characterized in that: The positioning notch (9) is a partial truncated cone, and the minimum diameter of the positioning notch (9) matches the diameter of the positioning rod (15). The height of the lower end of the positioning rod (15) is lower than the height of the lower end of the suction tube (14).

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