Flow measuring equipment of volumetric liquid chromatograph

Abstract

The invention relates to the technical field of chromatographic instrument flow detection, and discloses a volumetric liquid chromatograph flow measuring device, which comprises a mounting rack, the top of the mounting rack is fixedly connected with a volumetric tube, the top of the volumetric tube is provided with a liquid inlet pump, the mounting rack is provided with a power mechanism, and the power mechanism is connected with the volumetric tube. A side face cleaning mechanism is arranged on the inner wall of the volume pipe, a top cleaning mechanism is arranged on the inner wall of the volume pipe, and a dehumidification mechanism is arranged on the inner wall of the volume pipe. According to the flow measuring equipment for the volumetric liquid chromatograph, the side surface cleaning mechanism is arranged, when liquid passes through an impeller I, the impeller I is driven to rotate, the impeller I drives a first rotating shaft to rotate with a disc block, the disc block rotates to abut against the inner wall of a volumetric tube, so that a supporting block rotates, and the supporting block drives a cleaning piece to clean the side surface of the volumetric tube; the residual liquid is removed, the liquid in the volume tube is effectively discharged, and the inner wall of the volume tube is cleaned, so that the accuracy and reliability of next determination are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of chromatograph flow calibration, in particular to a volumetric liquid chromatograph flow measurement device. Background Art

[0002] Liquid chromatograph is mainly used for analyzing organic compounds with high boiling point, non-volatile, thermally unstable and large molecular weight. It consists of a reservoir, pump, injector, chromatographic column, detector, recorder, etc. The mobile phase in the reservoir is pumped into the system by a high-pressure pump, and the sample solution enters the mobile phase through the injector and is carried into the chromatographic column (stationary phase). When passing through the detector, the sample concentration is converted into an electrical signal and transmitted to the recorder.

[0003] The calibration of the pump flow rate requires manual collection of the pumped liquid multiple times and calibration through data analysis. However, in the existing volumetric flow measuring devices, the volume tube used to collect the liquid is reused continuously, and liquid will remain on the inner wall. High-boiling point or viscous liquids are easy to adhere to the inner wall of the volume tube, especially when the liquid is not completely discharged. The long-term residual liquid forms a film that is difficult to clean by conventional methods. Secondly, certain compounds may react with the tube wall material, resulting in difficult-to-remove deposits or contamination, which increases the difficulty of cleaning. The space in the pipeline is limited, and manual or mechanical cleaning tools are difficult to penetrate deeply, reducing the cleaning efficiency. Especially in the case of frequent flow calibration, the workload of the laboratory is increased. At the same time, if the cleaning is not thorough, the residual liquid may cause cross-contamination to subsequent sample analysis, resulting in inaccurate experimental results. This requires more stringent cleaning procedures, further increasing the complexity of the work. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the present invention provides a volumetric liquid chromatograph flow measurement device, which solves the problem that residual liquid in the volume tube is difficult to clean during pump flow measurement, which increases the burden on the laboratory and affects the accuracy of the results.

[0006] (II) Technical solution

[0007] To achieve the above object, the present invention provides the following technical solution: a volumetric liquid chromatograph flow measurement device, comprising a mounting frame, a volume tube is fixedly connected to the top of the mounting frame, a liquid inlet pump is arranged on the top of the volume tube, a power mechanism is arranged on the mounting frame, a side cleaning mechanism is arranged on the inner wall of the volume tube, a top cleaning mechanism is arranged on the inner wall of the volume tube, and a dehumidification mechanism is arranged on the inner wall of the volume tube;

[0008] The power mechanism is used to provide stable experimental power, the side cleaning mechanism is used to wipe and clean the inner wall side of the volume tube, the top cleaning mechanism is used to clean and wipe the top part of the inner wall of the volume tube, and the dehumidification mechanism is used to dry and dehumidify the top cleaning mechanism that has been dehumidified.

[0009] Preferably, the power mechanism includes a back slide groove, which is fixedly connected to the back of the mounting frame, a placement plate is slidably connected to the inner wall of the back slide groove, a counterweight block is arranged on the top of the placement plate, one end of a pull rope is fixedly connected to the top of the placement plate, the other end of the pull rope is fixedly connected to a guide block, the pull rope passes through a fixed pulley, a stop needle is fixedly connected to the back of the guide block, and a groove-type photoelectric sensor is arranged on the front of the mounting frame.

[0010] Preferably, the guide block is slidably connected to the front side of the mounting frame, and three slot-type photoelectric sensors are provided, and the three slot-type photoelectric sensors are arranged in an array.

[0011] Preferably, the side cleaning mechanism includes a guide cylinder, which is fixedly connected to the inner wall of the guide block, a solenoid valve is fixedly connected to the bottom of the guide cylinder, the top of the guide cylinder is rotatably connected to a support block, a drainage channel is provided on the inner wall of the support block, a first rotating shaft is rotatably connected to the inner wall of the support block, an impeller 1 is fixedly connected to the top of the first rotating shaft, a disc block is fixedly connected to the bottom of the first rotating shaft, a side channel is provided on the inner wall of the support block, one end of a spring 1 is fixedly connected to the inner wall of the support block, and the other end of the spring 1 is fixedly connected to a sealing column.

[0012] Preferably, the outer wall of the support block is connected to the inner wall piston of the volume tube, the side of the disc block is provided with a high friction coefficient material, the side channel is connected to the inner wall of the discharge channel, and the sealing column is connected to the inner wall piston of the discharge channel.

[0013] Preferably, the top cleaning mechanism includes a transverse connecting shaft, which is rotatably connected to the inner wall of the support block, the outer wall of the transverse connecting shaft is fixedly connected to a sealing baffle, the outer wall of the sealing baffle is fixedly connected to a cleaning member, the cleaning member is made of a highly water-absorbent material, one end of a return scroll spring is fixedly connected to the surface of the transverse connecting shaft, the other end of the return scroll spring is fixedly connected to the inner wall of the support block, the inner wall of the support block is slidably connected to a sliding bar, the outer wall of the sliding bar is fixedly connected to one end of a spring two, the other end of the spring two is fixedly connected to a rack block, a half gear is provided on the outer wall of the transverse connecting shaft, and a blocking block is fixedly connected to the inner wall of the support block.

[0014] Preferably, the outer wall of the rack block is slidably connected to the sliding bar, and the blocking block is located at the bottom of the rack block.

[0015] Preferably, the dehumidification mechanism includes a flexible pawl, which is fixedly connected to the outer wall of the sealing column, the inner wall of the support block is fixedly connected to a fixed column, the outer wall of the fixed column is fixedly connected to one end of a force storage spiral spring, the other end of the force storage spiral spring is fixedly connected to a rotating sleeve, the outer wall of the rotating sleeve is provided with a ratchet, the bottom of the rotating sleeve is fixedly connected to a second rotating shaft, the second rotating shaft is connected to the first rotating shaft through a belt one transmission connection, the inner wall of the support block is rotatably connected to an impeller two, the connecting shaft of the impeller two is connected to the second rotating shaft through a belt two transmission connection, the inner wall of the support block is provided with a discharge channel, and the inner wall of the support block is provided with an air intake channel.

[0016] Preferably, the outer wall of the fixed column is rotatably connected to the inner wall of the rotating sleeve, a one-way valve is provided on the inner wall of the exhaust channel, and a drying element is provided on the inner wall of the air inlet channel.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention provides a volumetric liquid chromatograph flow measurement device, which has the following beneficial effects:

[0019] 1. The volumetric liquid chromatograph flow measurement device is provided with a side cleaning mechanism. When the liquid passes through the impeller, the impeller is driven to rotate. The impeller drives the first rotating shaft and the disc block to rotate. The rotation of the disc block conflicts with the inner wall of the volume tube, so that the support block rotates. The support block drives the cleaning member to clean the side of the volume tube to remove residual liquid, effectively discharge the liquid in the volume tube and clean its inner wall, so as to ensure the accuracy and reliability of the next measurement.

[0020] 2. The volumetric liquid chromatograph flow measurement device uses a top cleaning mechanism. The cleaning part rotates to the top, and the top of the inner wall of the volume tube is cleaned to absorb the residual liquid, ensuring that the top of the inner wall of the volume tube is effectively cleaned to remove the residual liquid, further avoiding the introduction of contamination in the next experiment. The cleaning effect is improved, providing more reliable results for subsequent experiments.

[0021] 3. The volumetric liquid chromatograph flow measuring device utilizes a dehumidification mechanism so that moisture in the cleaning element is carried downward, and the drying element in the air inlet passage is a desiccant that can dry the air, so that the air passing through the cleaning element is dry air. The moisture is discharged and the dry air is introduced, which can effectively dry the cleaning element, thereby improving the working efficiency and cleaning effect of the cleaning element. The dry cleaning element can more effectively absorb and remove residual liquid on the inner wall of the volume tube when used next time, further reducing the risk of liquid residue and cross contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of a front view of a volumetric liquid chromatograph flow measurement device proposed by the present invention;

[0023] Figure 2 This is a schematic structural diagram of a back view of a volumetric liquid chromatograph flow measurement device proposed by the present invention;

[0024] Figure 3 This is a schematic structural diagram of a needle stopper for a flow measurement device of a positive displacement liquid chromatograph proposed by the present invention;

[0025] Figure 4 This is a structural schematic diagram of a slot-type photoelectric sensor for a volumetric liquid chromatograph flow measurement device proposed by the present invention;

[0026] Figure 5 A schematic cross-sectional structure diagram of a volumetric tube of a volumetric liquid chromatograph flow measurement device proposed by the present invention;

[0027] Figure 6 A schematic cross-sectional structure diagram of a support block of a flow measurement device for a volumetric liquid chromatograph proposed by the present invention;

[0028] Figure 7 This is a schematic structural diagram of a cleaning component of a flow measurement device for a volumetric liquid chromatograph proposed by the present invention;

[0029] Figure 8 A schematic diagram of the structure of a rack block of a flow measurement device for a volumetric liquid chromatograph proposed by the present invention;

[0030] Fig. 9 This is a schematic structural diagram of a force-storing scroll spring of a volumetric liquid chromatograph flow measurement device proposed by the present invention;

[0031] Fig.10 This is a schematic structural diagram of a second rotating shaft of a volumetric liquid chromatograph flow measurement device proposed by the present invention;

[0032] Fig.11 The present invention provides a schematic structural diagram of a dehumidification mechanism for a volumetric liquid chromatograph flow measurement device.

[0033] In the figure: 1. mounting frame; 2. volume tube; 3. liquid inlet pump; 4. power mechanism; 41. back slide; 42. placement plate; 43. counterweight block; 44. pull rope; 45. fixed pulley; 46. guide block; 47. stop needle; 48. slot photoelectric sensor; 5. side cleaning mechanism; 51. guide cylinder; 52. solenoid valve; 53. support block; 54. liquid discharge channel; 55. first rotating shaft; 56. impeller 1; 57. disc block; 58. side channel; 59. spring 1; 510. sealing column; 6. top cleaning mechanism; 61. Transverse connecting shaft; 62. Sealing baffle; 63. Cleaning part; 64. Return scroll spring; 65. Sliding bar; 66. Spring 2; 67. Rack block; 68. Half gear; 69. Blocking block; 7. Dehumidification mechanism; 71. Flexible pawl; 72. Fixed column; 73. Power storage scroll spring; 74. Rotating sleeve; 75. Ratchet; 76. Second rotating shaft; 77. Belt 1; 78. Impeller 2; 79. Belt 2; 710. Exhaust channel; 711. Inlet channel; 712. One-way valve; 713. Drying part. DETAILED DESCRIPTION

[0034] 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.

[0035] See also Figure 1-Figure 11 A volumetric liquid chromatograph flow measuring device comprises a mounting frame 1, a volume tube 2 is fixedly connected to the top of the mounting frame 1, a liquid inlet pump 3 is arranged on the top of the volume tube 2, a power mechanism 4 is arranged on the mounting frame 1, a side cleaning mechanism 5 is arranged on the inner wall of the volume tube 2, a top cleaning mechanism 6 is arranged on the inner wall of the volume tube 2, and a dehumidification mechanism 7 is arranged on the inner wall of the volume tube 2; the power mechanism 4 is used to provide stable experimental power, the side cleaning mechanism 5 is used to wipe and clean the side of the inner wall of the volume tube 2, the top cleaning mechanism 6 is used to clean and wipe the top part of the inner wall of the volume tube 2, and the dehumidification mechanism 7 is used to dry and dehumidify the top cleaning mechanism 6 that has been dehumidified.

[0036] The power mechanism 4 includes a back slide groove 41, which is fixedly connected to the back of the mounting frame 1. A placement plate 42 is slidably connected to the inner wall of the back slide groove 41. A counterweight block 43 is arranged on the top of the placement plate 42. The counterweight block 43 can place the required mass as needed. One end of a pull rope 44 is fixedly connected to the top of the placement plate 42, and the other end of the pull rope 44 is fixedly connected to a guide block 46. The pull rope 44 passes through a fixed pulley 45, and a stop needle 47 is fixedly connected to the back of the guide block 46. A slot-type photoelectric sensor 48 is arranged on the front of the mounting frame 1. The guide block 46 is slidably connected to the front of the mounting frame 1. Three slot-type photoelectric sensors 48 are arranged, and the three slot-type photoelectric sensors 48 are arranged in an array. Connect the output pipe to the top of the liquid inlet pump 3, turn on the liquid inlet pump 3 to drive the liquid into the volume tube 2, so that the volume tube 2 drives the guide cylinder 51 to move downward, the guide cylinder 51 drives the guide block 46 to move downward, the guide block 46 drives the stop needle 47 to move downward, the stop needle 47 passes through different slot-type photoelectric sensors 48, and the distances between the slot-type photoelectric sensors 48 are evenly spaced. When the calibrated pump flow rate is small, the data between the first and second slot-type photoelectric sensors 48 can be collected. When the calibrated pump flow rate is large, the data between the second and third slot-type photoelectric sensors 48 can be collected, and the corresponding volume and time parameters can be obtained to calculate the error of the flow setting value and the value of the flow stability.

[0037] The side cleaning mechanism 5 includes a guide cylinder 51, which is fixedly connected to the inner wall of the guide block 46, a solenoid valve 52 is fixedly connected to the bottom of the guide cylinder 51, a support block 53 is rotatably connected to the top of the guide cylinder 51, a discharge channel 54 is provided on the inner wall of the support block 53, a first rotating shaft 55 is rotatably connected to the inner wall of the support block 53, an impeller 56 is fixedly connected to the top of the first rotating shaft 55, a disc block 57 is fixedly connected to the bottom of the first rotating shaft 55, a side channel 58 is provided on the inner wall of the support block 53, one end of a spring 59 is fixedly connected to the inner wall of the support block 53, a sealing column 510 is fixedly connected to the other end of the spring 59, the outer wall of the support block 53 is connected to the inner wall piston of the volume tube 2, a high friction coefficient material, such as silica gel, is provided on the side of the disc block 57, the side channel 58 is communicated with the inner wall of the discharge channel 54, and the sealing column 510 is connected to the inner wall piston of the discharge channel 54. Close the liquid inlet pump 3 and open the solenoid valve 52 to discharge the liquid. At this time, the counterweight block 43 with appropriate mass drives the placement plate 42 to move downward, and the placement plate 42 drives the pull rope 44 to move downward, and the pull rope 44 drives the guide block 46 to move upward, and the guide block 46 drives the guide cylinder 51 and the support block 53 to move upward, and the support block 53 squeezes the liquid in the volume tube 2, so that the liquid squeezes the sealing column 510, and the sealing column 510 squeezes the spring 59. At this time, the liquid passes through the side channel 58, the discharge channel 54, and the channel on the inner wall of the guide cylinder 51, and is finally discharged through the solenoid valve 52. When the liquid passes through the impeller 56, it drives the impeller 56 to rotate, and the impeller 56 drives the first rotating shaft 55 and the disc block 57 to rotate. The disc block 57 rotates and contacts the inner wall of the volume tube 2, so that the support block 53 rotates, and the support block 53 drives the cleaning member 63 to clean the side of the volume tube 2.

[0038] The top cleaning mechanism 6 includes a transverse connecting shaft 61, which is rotatably connected to the inner wall of the support block 53, and the outer wall of the transverse connecting shaft 61 is fixedly connected with a sealing baffle 62, and the outer wall of the sealing baffle 62 is fixedly connected with a cleaning member 63, which is made of a highly absorbent material, such as a sponge. The surface of the transverse connecting shaft 61 is fixedly connected with one end of a return scroll spring 64, and the other end of the return scroll spring 64 is fixedly connected to the inner wall of the support block 53. The inner wall of the support block 53 is slidably connected with a sliding bar 65, and the outer wall of the sliding bar 65 is fixedly connected with one end of a spring 2 66, and the other end of the spring 2 66 is fixedly connected with a rack block 67. A half gear 68 is provided on the outer wall of the transverse connecting shaft 61, and a blocking block 69 is fixedly connected to the inner wall of the support block 53. The outer wall of the rack block 67 is slidably connected to the sliding bar 65, and the blocking block 69 is located at the bottom of the rack block 67, so that the rack block 67 moves downward for a distance and then contacts the blocking block 69. When the support block 53 moves upward until it is about to collide with the volume tube 2, the top of the inner wall of the volume tube 2 collide with the sliding bar 65, and the sliding bar 65 drives the spring 2 66 and the rack block 67 to move downward, and the rack block 67 drives the half gear 68 to rotate half a circle. At this time, the rack block 67 conflicts with the blocking block 69, and the half gear 68 drives the transverse connecting shaft 61, the sealing baffle 62, and the cleaning member 63 to rotate half a circle. At this time, the return scroll spring 64 accumulates force, and the cleaning member 63 rotates to the top, and the top of the inner wall of the volume tube 2 is cleaned to absorb residual liquid, ensuring that the top of the inner wall of the volume tube 2 is effectively cleaned.

[0039] The dehumidification mechanism 7 includes a flexible pawl 71, which is fixedly connected to the outer wall of the sealing column 510, and the inner wall of the support block 53 is fixedly connected to a fixed column 72, and the outer wall of the fixed column 72 is fixedly connected to one end of a power storage scroll spring 73, and the other end of the power storage scroll spring 73 is fixedly connected to a rotating sleeve 74, and the outer wall of the rotating sleeve 74 is provided with a ratchet 75, and the bottom of the rotating sleeve 74 is fixedly connected to a second rotating shaft 76, and the second rotating shaft 76 and the first rotating shaft 55 are connected by a belt. The inner wall of the support block 53 is connected to the second rotating shaft 76 by a belt 79, the inner wall of the support block 53 is provided with a discharge channel 710, the inner wall of the support block 53 is provided with an air intake channel 711, the outer wall of the fixed column 72 is connected to the inner wall of the rotating sleeve 74 by a rotation, a check valve 712 is provided on the inner wall of the discharge channel 710, and a drying element 713 is provided on the inner wall of the air intake channel 711. The power accumulated by the power storage scroll spring 73 is released to drive the rotating sleeve 74 and the second rotating shaft 76 to rotate, the second rotating shaft 76 drives the second impeller 78 to rotate through the belt 79, and the second impeller 78 drives the air to flow downward, so that the moisture in the cleaning element 63 is taken out downward, and the drying element 713 in the air intake channel 711 is a desiccant that can dry the air, so that the air passing through the cleaning element 63 is dry air.

[0040] To sum up, when the volumetric liquid chromatograph flow measuring device is used, the output pipe is connected to the top of the liquid inlet pump 3, and the liquid inlet pump 3 is turned on to drive the liquid into the volumetric tube 2, so that the volumetric tube 2 drives the guide cylinder 51 to move downward, the guide cylinder 51 drives the guide block 46 to move downward, and the guide block 46 drives the stop needle 47 to move downward. The stop needle 47 passes through different slot-type photoelectric sensors 48, and the distances between the slot-type photoelectric sensors 48 are evenly spaced. When the calibrated pump flow rate is small, the data between the first and second slot-type photoelectric sensors 48 can be collected. When the calibrated pump flow rate is large, the data between the second and third slot-type photoelectric sensors 48 can be collected, and the corresponding volume and time parameters can be obtained to calculate the error of the flow setting value and the value of the flow stability.

[0041] After the test is completed, the liquid inlet pump 3 is closed, and the electromagnetic valve 52 is opened to discharge the liquid. At this time, the counterweight block 43 with appropriate mass drives the placement plate 42 to move downward, the placement plate 42 drives the pull rope 44 to move downward, the pull rope 44 drives the guide block 46 to move upward, the guide block 46 drives the guide cylinder 51 and the support block 53 to move upward, the support block 53 squeezes the liquid in the volume tube 2, so that the liquid squeezes the sealing column 510, and the sealing column 510 squeezes the spring 1 59. At this time, the liquid passes through the side channel 58 and the liquid discharge channel 54. The channel on the inner wall of the guide cylinder 51 is finally discharged through the electromagnetic valve 52. When the liquid passes through the impeller 56, it drives the impeller 56 to rotate. The impeller 56 drives the first rotating shaft 55 and the disc block 57 to rotate. The disc block 57 rotates and contacts the inner wall of the volume tube 2, so that the support block 53 rotates. The support block 53 drives the cleaning member 63 to clean the side of the volume tube 2 to remove the residual liquid, effectively discharge the liquid in the volume tube 2 and clean its inner wall to ensure the accuracy and reliability of the next measurement.

[0042] When the sealing column 510 moves downward, it drives the flexible pawl 71 downward to engage the ratchet 75, so that the ratchet 75 can only rotate in one direction. At this time, the first rotating shaft 55 drives the second rotating shaft 76 to rotate through the belt 1 77, and the second rotating shaft 76 drives the rotating sleeve 74 to rotate, thereby storing force in the force storage spiral spring 73.

[0043] When the support block 53 moves upward to almost contact the volume tube 2, the top of the inner wall of the volume tube 2 contacts the sliding bar 65, and the sliding bar 65 drives the spring 2 66 and the rack block 67 to move downward, and the rack block 67 drives the half gear 68 to rotate half a circle. At this time, the rack block 67 contacts the blocking block 69, and the half gear 68 drives the transverse connecting shaft 61, the sealing baffle 62, and the cleaning member 63 to rotate half a circle. At this time, the return scroll spring 64 accumulates power, and the cleaning member 63 rotates to the top, and the top of the inner wall of the volume tube 2 is cleaned to absorb the residual liquid, ensuring that the top of the inner wall of the volume tube 2 is effectively cleaned to remove the residual liquid, and further avoid introducing contamination in the next experiment. The cleaning effect is improved, providing more reliable results for subsequent experiments.

[0044] When the drainage is completed, when the liquid inlet pump 3 is turned on again, the support block 53 moves downward, and the return scroll spring 64 drives the transverse connecting shaft 61, the sealing baffle 62, and the cleaning member 63 to rotate half a circle in the opposite direction to return, and the half gear 68 on the transverse connecting shaft 61 drives the rack block 67 to return upward, and the rack block 67 drives the sliding bar 65 and the spring 2 66 to return upward.

[0045] At this time, spring 1 59 drives the sealing column 510 to move upward, and the sealing column 510 drives the flexible pawl 71 to move upward. At this time, the force stored in the force-storing spiral spring 73 is released to drive the rotating sleeve 74 and the second rotating shaft 76 to rotate. The second rotating shaft 76 drives the impeller 2 78 to rotate through the belt 2 79, and the impeller 2 78 drives the air to flow downward, so that the moisture in the cleaning member 63 is brought out downward, and the drying member 713 in the air inlet channel 711 is a desiccant that can make the air dry, so that the air passing through the cleaning member 63 is dry air, and the moisture is discharged and dry air is introduced, which can effectively dry the cleaning member 63, thereby improving the working efficiency and cleaning effect of the cleaning member 63. When the dry cleaning member 63 is used next time, it can more effectively absorb and remove the residual liquid on the inner wall of the volume tube 2, further reducing the risk of liquid residue and cross contamination.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A volumetric liquid chromatograph flow measurement device, comprising a mounting frame (1), characterized in that: The top of the mounting frame (1) is fixedly connected to a volume tube (2), the top of the volume tube (2) is provided with a liquid inlet pump (3), the mounting frame (1) is provided with a power mechanism (4), the inner wall of the volume tube (2) is provided with a side cleaning mechanism (5), the inner wall of the volume tube (2) is provided with a top cleaning mechanism (6), and the inner wall of the volume tube (2) is provided with a dehumidification mechanism (7); The power mechanism (4) is used to provide stable experimental power, the side cleaning mechanism (5) is used to wipe and clean the inner wall side of the volume tube (2), the top cleaning mechanism (6) is used to clean and wipe the top part of the inner wall of the volume tube (2), and the dehumidification mechanism (7) is used to dry and dehumidify the top cleaning mechanism (6) that has been dehumidified.

2. A volumetric liquid chromatograph flow measurement device according to claim 1, characterized in that: The power mechanism (4) comprises a back slide groove (41), wherein the back slide groove (41) is fixedly connected to the back of the mounting frame (1), a placement plate (42) is slidably connected to the inner wall of the back slide groove (41), a counterweight block (43) is arranged on the top of the placement plate (42), one end of a pull rope (44) is fixedly connected to the top of the placement plate (42), the other end of the pull rope (44) is fixedly connected to a guide block (46), the pull rope (44) passes through a fixed pulley (45), a stopper needle (47) is fixedly connected to the back of the guide block (46), and a slot-type photoelectric sensor (48) is arranged on the front of the mounting frame (1).

3. A volumetric liquid chromatograph flow measurement device according to claim 2, characterized in that: The guide block (46) is slidably connected to the front side of the mounting frame (1), and three slot-shaped photoelectric sensors (48) are provided, and the three slot-shaped photoelectric sensors (48) are arranged in an array.

4. A volumetric liquid chromatograph flow measurement device according to claim 2, characterized in that: The side cleaning mechanism (5) comprises a guide sleeve (51), wherein the guide sleeve (51) is fixedly connected to the inner wall of the guide block (46), the bottom of the guide sleeve (51) is fixedly connected to a solenoid valve (52), the top of the guide sleeve (51) is rotatably connected to a support block (53), the inner wall of the support block (53) is provided with a drainage channel (54), the inner wall of the support block (53) is rotatably connected to a first rotating shaft (55), the top of the first rotating shaft (55) is fixedly connected to an impeller 1 (56), the bottom of the first rotating shaft (55) is fixedly connected to a disc block (57), the inner wall of the support block (53) is provided with a side channel (58), one end of a spring 1 (59) is fixedly connected to the inner wall of the support block (53), and the other end of the spring 1 (59) is fixedly connected to a sealing column (510).

5. A volumetric liquid chromatograph flow measurement device according to claim 4, characterized in that: The outer wall of the support block (53) is connected to the inner wall piston of the volume tube (2), the side of the disc block (57) is provided with a high friction coefficient material, the side channel (58) is connected to the inner wall of the discharge channel (54), and the sealing column (510) is connected to the inner wall piston of the discharge channel (54).

6. A volumetric liquid chromatograph flow measurement device according to claim 4, characterized in that: The top cleaning mechanism (6) comprises a transverse connecting shaft (61), wherein the transverse connecting shaft (61) is rotatably connected to the inner wall of the support block (53), the outer wall of the transverse connecting shaft (61) is fixedly connected with a sealing baffle (62), the outer wall of the sealing baffle (62) is fixedly connected with a cleaning member (63), the cleaning member (63) is made of a highly water-absorbent material, the surface of the transverse connecting shaft (61) is fixedly connected with one end of a return scroll spring (64), the other end of the return scroll spring (64) is fixedly connected to the inner wall of the support block (53), the inner wall of the support block (53) is slidably connected with a sliding bar (65), the outer wall of the sliding bar (65) is fixedly connected with one end of a second spring (66), the other end of the second spring (66) is fixedly connected with a rack block (67), the outer wall of the transverse connecting shaft (61) is provided with a half gear (68), and the inner wall of the support block (53) is fixedly connected with a blocking block (69).

7. A volumetric liquid chromatograph flow measurement device according to claim 6, characterized in that: The outer wall of the rack block (67) is slidably connected to the sliding bar (65), and the blocking block (69) is located at the bottom of the rack block (67).

8. A volumetric liquid chromatograph flow measurement device according to claim 6, characterized in that: The dehumidification mechanism (7) comprises a flexible pawl (71), wherein the flexible pawl (71) is fixedly connected to the outer wall of the sealing column (510), the inner wall of the support block (53) is fixedly connected to a fixing column (72), the outer wall of the fixing column (72) is fixedly connected to one end of a force storage scroll spring (73), the other end of the force storage scroll spring (73) is fixedly connected to a rotating sleeve (74), the outer wall of the rotating sleeve (74) is provided with a ratchet (75), and the rotating sleeve (74) is fixedly connected to the outer wall of the rotating sleeve (74). A second rotating shaft (76) is fixedly connected to the bottom, and the second rotating shaft (76) is connected to the first rotating shaft (55) through a belt 1 (77). The inner wall of the support block (53) is rotatably connected to an impeller 2 (78), and the connecting shaft of the impeller 2 (78) is connected to the second rotating shaft (76) through a belt 2 (79). The inner wall of the support block (53) is provided with a discharge channel (710), and the inner wall of the support block (53) is provided with an air intake channel (711).

9. A volumetric liquid chromatograph flow measurement device according to claim 8, characterized in that: The outer wall of the fixed column (72) is rotatably connected to the inner wall of the rotating sleeve (74), a one-way valve (712) is provided on the inner wall of the discharge channel (710), and a drying element (713) is provided on the inner wall of the air inlet channel (711).

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