Automatic detection system for oil chromatographic analysis

Abstract

The invention discloses a grease chromatographic analysis automatic detection system, and belongs to the technical field of substance detection, the grease chromatographic analysis automatic detection system comprises a spectrograph, the spectrograph is provided with a feeding assembly and a filtering assembly, the filtering assembly can effectively filter impurities in gas, and through the automatic cleaning function of a fan-shaped circular plate, the impurities in the gas can be removed. The stability of gas conveying and the accuracy of a detection result are ensured, the feeding assembly can support continuous detection of a plurality of sample storage tubes, different samples can be rapidly switched for detection through rotation of a feeding disc and switching of a switching circular plate, a liquid injection guide pipe and a sampling barrel can be automatically cleaned after each time of detection, and the detection efficiency is improved. According to the device, the influence of sample residues on subsequent detection results is avoided, the accuracy and consistency of detection are ensured, full-automatic operation from sampling, filtering, diluting, mixing to detection of grease samples is realized through cooperative work of the feeding assembly, the filtering assembly and the spectrograph, manual intervention is reduced, and the detection efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of material detection, in particular to an automatic detection system for oil chromatography analysis. Background Art

[0002] In the field of oil chromatography analysis, traditional detection methods usually rely on manual operations, including steps such as sampling, filtering, diluting, mixing and injecting into the spectrometer. These operations are not only time-consuming and labor-intensive, but also easily introduce human errors, affecting the accuracy and repeatability of the detection results. In addition, the existing detection systems often lack effective automatic cleaning functions for the input of auxiliary gases, and the accuracy of subsequent detection results is easily affected by impurities in the gas. With the increasing demand for laboratory automation, the existing oil chromatography analysis systems can no longer meet the high-efficiency and accurate detection requirements of modern laboratories in terms of automation level, detection efficiency and cleaning function. Therefore, the present invention provides an automatic detection system for oil chromatography analysis. Summary of the invention

[0003] In view of the defects in the prior art, the present invention provides an automatic detection system for oil chromatography analysis, which overcomes the problems that it can only process a single sample, cannot realize continuous detection of multiple samples, and cannot effectively filter impurities in the gas, resulting in reduced reliability of the detection results.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic detection system for oil chromatography analysis, including a spectrometer, a feeding assembly is arranged on the spectrometer, the feeding assembly includes a switching circular plate, liquid injection conduits are symmetrically arranged on the switching circular plate, a switching ring plate is rotatably installed on the switching circular plate, a sampling cylinder is fixedly arranged on the switching ring plate, a sampling piston rod is slidably installed in the sampling cylinder, a mixing slide rod is slidably installed on the sampling piston rod, three air guide tubes are arranged on the side of the spectrometer, and a filter assembly is arranged on the spectrometer, the filter assembly includes a filter housing 1 and a filter housing 2, three circular filter blocks are arranged on the filter housing 2, the circular filter blocks are respectively used to filter the intake air of the corresponding air guide tubes, and three fan-shaped circular plates 1 and 3 fan-shaped circular plates 2 are also movably arranged on the filter housing 2, the fan-shaped circular plate 1 is used to clean the surface of the circular filter block, and the fan-shaped circular plate 2 is used to clean the depression of the fan-shaped circular plate 1.

[0005] Furthermore, a positioning slide is slidably installed on the spectrometer, and a switching circular plate is rotatably installed on the positioning slide. The injection conduit and the switching circular plate are threadedly connected, and a filter is provided on the inner side of one of the two injection conduits. A liquid storage chamber is formed between the sampling tube and the sampling piston rod, and an auxiliary conduit is also provided on the sampling piston rod.

[0006] Furthermore, a supporting circular plate is rotatably mounted on the spectrometer, a feeding tray is fixedly mounted on the supporting circular plate, a plurality of sample storage tubes are movably arranged in a circle on the feeding tray, a plurality of positioning short columns are also circumferentially arranged on the feeding tray, the sample storage tubes are provided with through holes that cooperate with the positioning short columns, a fan-shaped strip is rotatably mounted on the feeding tray, and the positioning short columns and the fan-shaped strip are used to limit the position of the sample storage tubes on the feeding tray.

[0007] Furthermore, an arc-shaped notch is provided on the feed tray, and the arc-shaped notch on the feed tray is used to make way for the movement of the switching circular plate. A waste liquid duct is also fixedly provided on the feed tray, and a waste liquid barrel is also fixedly installed on the side of the spectrometer. A connecting pipe is fixedly provided on the waste liquid barrel, and the waste liquid duct and the connecting pipe are used to divert the waste liquid.

[0008] Furthermore, a cabinet is fixedly mounted on the spectrometer, and the cabinet is used to protect the feeding assembly. Cabinet doors are symmetrically rotatably mounted on the cabinet.

[0009] Furthermore, the three air ducts are respectively an air inlet pipe, a hydrogen inlet pipe, and a tail gas inlet pipe; the air ducts corresponding to the air inlet pipe and the hydrogen inlet pipe are connected to the corresponding pipes of the spectrometer, and the air duct corresponding to the tail gas inlet pipe is connected to the air duct corresponding to the hydrogen inlet pipe.

[0010] Furthermore, filter housing 2 is fixedly installed on the spectrometer, filter housing 1 is slidably installed on the spectrometer, and three cleaning chambers are formed between filter housing 1, filter housing 2, and three fan-shaped circular plates, and three circular filter blocks are respectively located in corresponding cleaning chambers.

[0011] Furthermore, three circular filter blocks are fixedly arranged in a circular array on the filter housing 2, three sector-shaped circular plates are rotatably installed in a circular array on the filter housing 2, a gear set 1 is arranged between the three sector-shaped circular plates 1, three sector-shaped circular plates 2 are rotatably installed in a circular array on the filter housing 2, and a gear set 2 is arranged between the three sector-shaped circular plates 2.

[0012] Furthermore, three air supply pipes are fixedly arranged in a circumferential array on the second filter housing. The air supply pipes are respectively on the same straight line as the axes of the corresponding air guide pipes, and the air supply pipes are respectively used to transport gas to the corresponding air guide pipes.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention can effectively filter impurities in the gas by setting a filter component, and prevent the accumulation of impurities on the surface of the filter block through the automatic cleaning function of the fan-shaped circular plate, thereby ensuring the stability of gas delivery and the accuracy of the test results. (2) The present invention can support the continuous detection of multiple sample storage tubes by setting a feeding component, and can quickly switch different samples for detection by rotating the feeding plate and switching the switching circular plate, thereby improving the throughput of the detection. (3) The present invention can automatically clean the injection tube and the sampling tube after each detection by setting a waste liquid conduit and a cleaning liquid injection function, thereby avoiding the influence of sample residues on subsequent test results and ensuring the accuracy and consistency of the detection. (4) The present invention realizes the fully automated operation of oil and fat samples from sampling, filtration, dilution, mixing to detection through the coordinated work of the feeding component, the filtering component and the spectrometer, thereby reducing manual intervention and improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 It is a structural schematic diagram of the waste liquid barrel of the present invention.

[0016] Figure 3 It is a structural schematic diagram of the feeding tray of the present invention.

[0017] Figure 4 for Figure 3 A local enlarged schematic diagram of point A in the middle.

[0018] Figure 5 It is a schematic diagram of the structure of the switching circular plate of the present invention.

[0019] Figure 6 for Figure 5 A local enlarged schematic diagram of point B in the middle.

[0020] Figure 7 It is a structural schematic diagram of the position adjustment slide of the present invention.

[0021] Figure 8 It is a schematic diagram of the structure of the hybrid slide bar of the present invention.

[0022] Fig. 9 It is a schematic diagram of the structure of the filter assembly of the present invention.

[0023] Fig.10 It is a structural schematic diagram of the air guide tube of the present invention.

[0024] Fig.11 It is a schematic diagram of the structure of the second part of the filter housing of the present invention.

[0025] Fig.12It is a schematic structural diagram of one part of the filter housing of the present invention.

[0026] Fig.13 for Fig.12 A partial enlarged schematic diagram of point C in the middle.

[0027] Fig.14 The figure is a schematic diagram of the structure of cleaning a part of the gear ring of the present invention.

[0028] Fig.15 It is a front view of two structures of the filter housing of the present invention.

[0029] Figure numerals: 101-spectrometer; 102-cabinet; 103-cabinet door; 104-waste liquid barrel; 105-feeding tray; 106-waste liquid conduit; 107-connecting pipe; 108-sample storage tube; 109-positioning short column; 110-switching ring plate; 111-switching circular plate; 112-liquid injection pipe; 113-switching motor; 114-fixing motor; 115-cleaning motor 2; 116-supporting circular plate; 117-fan-shaped strip plate; 118-positioning screw rod; 119-positioning motor; 120-positioning pulley; 121-liquid injection conduit; 122-positioning slide; 123-transposition Motor; 124-sampling tube; 125-sampling electric cylinder; 126-sampling piston rod; 127-mixing electric cylinder; 128-mixing slide rod; 129-auxiliary guide tube; 130-rotation motor; 131-filter housing one; 132-air supply pipe; 133-expansion screw rod; 134-expansion motor; 135-air guide pipe; 136-filter housing two; 137-circular filter block; 138-sector circular plate one; 139-sector circular plate two; 140-cleaning gear one; 141-cleaning gear two; 142-cleaning gear ring one; 143-cleaning gear ring two; 144-cleaning motor one. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] Example: Reference Figure 1-Figure 15A grease chromatography automatic detection system comprises a spectrometer 101, on which a feeding assembly is arranged, the feeding assembly comprises a switching circular plate 111, a positioning slide 122 is slidably mounted on the spectrometer 101, a positioning screw rod 118 is fixedly mounted on the positioning slide 122, a positioning pulley 120 is rotatably mounted on the spectrometer 101, the positioning pulley 120 and the positioning screw rod 118 constitute a spiral pair, a positioning motor 119 is fixedly mounted on the spectrometer 101, a pulley is fixedly mounted on the output shaft of the positioning motor 119, a belt is arranged between the pulley on the output shaft of the positioning motor 119 and the positioning pulley 120, the switching circular plate 111 is rotatably mounted on the positioning slide 122, a transposition motor 123 is fixedly mounted on the positioning slide 122, and the output shaft of the transposition motor 123 is fixedly connected to the switching circular plate 111.

[0032] The switching circular plate 111 is symmetrically provided with injection tubes 121, and a filter screen is provided on the inner side of one of the two injection tubes 121. The injection tubes 121 and the switching circular plate 111 are threadedly connected, so that the injection tubes 121 can be easily replaced. The switching circular plate 111 is provided with a through hole connected to the injection tube 121. The switching circular plate 111 is rotatably mounted with a switching ring plate 110, and a rotation motor 130 is fixedly mounted on the switching ring plate 110. The output shaft of the rotation motor 130 is fixedly connected to the switching circular plate 111. A sampling barrel 124 is fixedly provided on the switching ring plate 110, and the lower end surface of the sampling barrel 124 contacts the upper surface of the switching circular plate 111. When the lower end of the sampling barrel 124 is engaged with the through hole on the switching circular plate 111, the sampling barrel 124 is connected to the injection tube 121.

[0033] A sampling piston rod 126 is slidably installed in the sampling tube 124, and a liquid storage chamber is formed between the sampling tube 124 and the sampling piston rod 126. A sampling electric cylinder 125 is fixedly installed on the switching ring plate 110, and the piston rod end of the sampling electric cylinder 125 is fixedly connected to the sampling piston rod 126. A mixing slide bar 128 is slidably installed on the sampling piston rod 126, and a mixing electric cylinder 127 is also fixedly installed on the piston rod end of the mixing electric cylinder 127, and the piston rod end of the mixing electric cylinder 127 is fixedly connected to the mixing slide bar 128. An auxiliary conduit 129 is also provided on the sampling piston rod 126, and the auxiliary conduit 129 is used to input diluent or cleaning liquid into the liquid storage chamber.

[0034] The positioning motor 119 is started to drive the corresponding positioning pulley 120 to rotate, so that the positioning screw rod 118 moves up and down relative to the spectrometer 101, and then the positioning slide 122 moves up and down, and the transposition motor 123 is started to drive the switching circular plate 111 to rotate, and the switching ring plate 110 on the switching circular plate 111 rotates synchronously, that is, the switching of the positions of the two injection tubes 121 is realized, and the rotation motor 130 is started. Since the switching circular plate 111 cannot rotate under the action of the transposition motor 123, the switching ring plate 110 rotates relative to the switching circular plate 111 at this time, and the sampling tube 124 on the switching ring plate 110 rotates synchronously, that is, the position of the sampling tube 124 is adjusted, so that the sampling tube 124 can be docked with the required injection tube 121, and under the action of the switching ring plate 110, the through hole on the switching circular plate 111 will not be exposed to the external environment.

[0035] A supporting circular plate 116 is also rotatably mounted on the spectrometer 101, a switching motor 113 is fixedly mounted on the spectrometer 101, the output shaft of the switching motor 113 is fixedly connected to the supporting circular plate 116, a feeding tray 105 is fixedly mounted on the supporting circular plate 116, a plurality of sample storage tubes 108 are movably arranged in a circle on the feeding tray 105, a plurality of positioning short columns 109 are also circumferentially arranged on the feeding tray 105, the sample storage tubes 108 are provided with through holes that cooperate with the positioning short columns 109, a fan-shaped strip 117 is also rotatably mounted on the feeding tray 105, a fixed motor 114 is fixedly mounted on the lower surface of the feeding tray 105, the output shaft of the fixed motor 114 is fixedly connected to the fan-shaped strip 117, the positioning short columns 109 and the fan-shaped strip 117 are used to limit the position of the sample storage tube 108 on the feeding tray 105.

[0036] An arc-shaped notch is also provided on the feed tray 105, and the arc-shaped notch on the feed tray 105 is used to make way for the movement of the switching circular plate 111. A waste liquid conduit 106 is also fixedly provided on the feed tray 105. A waste liquid barrel 104 is also fixedly installed on the side of the spectrometer 101, and a connecting pipe 107 is fixedly provided on the waste liquid barrel 104. The waste liquid conduit 106 and the connecting pipe 107 are used to divert the waste liquid.

[0037] Start the fixed motor 114 to drive the fan-shaped strip 117 to rotate, so that the fan-shaped strip 117 is disengaged from the contact with the positioning short column 109, so that the sample tube 108 can be removed, and the sample tubes 108 containing the oil to be tested are placed on the feed tray 105 in turn, and the through holes on the sample tubes 108 are engaged with the positioning short column 109, and then start the fixed motor 114 to drive the fan-shaped strip 117 to rotate, so that the fan-shaped strip 117 is in contact with the upper surface of the sample tube 108, that is, the position of the sample tube 108 is fixed.

[0038] Then, the switching motor 113 is started to drive the supporting circular plate 116 to rotate, and the feeding tray 105 rotates synchronously, that is, the position of the sample tube 108 on the feeding tray 105 is switched, and the sample tube 108 to be tested is moved to the position closest to the axis of the transposition motor 123, and then the transposition motor 123 is started to drive the switching circular plate 111 to rotate, so that the injection conduit 121 equipped with the filter screen rotates to the top of the sample tube 108, and then the rotation motor 130 is started to move the sampling tube 124 to the top of the injection conduit 121, and then the rotation motor 130 is started. The positioning motor 119 causes the switching ring plate 110 and the switching circular plate 111 to move downward synchronously, that is, the liquid injection conduit 121 moves downward, so that the liquid injection conduit 121 contacts the raw material to be tested in the sample tube 108, and then the sampling cylinder 124 is started to drive the sampling piston rod 126 to move upward, so that the raw material in the sample tube 108 enters the liquid storage chamber formed between the sampling cylinder 124 and the sampling piston rod 126 along the liquid injection conduit 121, and under the action of the filter in the liquid injection conduit 121, the impurities in the raw material are filtered.

[0039] After the raw material in the sample storage tube 108 is extracted, the adjustment slide 122 is returned to the initial position, and then the diluent is added to the liquid storage chamber through the auxiliary guide tube 129, and then the mixing electric cylinder 127 is started to drive the mixing slide 128 to move up and down, so as to achieve full mixing of the diluent and the raw material in the liquid storage chamber, and then the rotation motor 130 is started to drive the switching ring plate 110 to rotate, so that the sampling tube 124 moves to the top of the injection guide tube 121 without a filter, and the switching motor 113 is started to drive the feeding tray 105 to rotate, so that the arc-shaped notch on the feeding tray 105 faces the switching ring plate 110. The position of the axis, and then the switching ring plate 110 and the switching circular plate 111 move downward synchronously, so that the two injection tubes 121 move downward synchronously, the injection tube 121 just below the sampling tube 124 is engaged with the injection tube 112, and the arc-shaped notch on the feed tray 105 makes way for the movement of the switching circular plate 111. The injection tube 112 is the feed port of the hydrogen flame ionization detector in the spectrometer 101, and then the liquid in the liquid storage chamber is injected into the spectrometer 101 through the sampling electric cylinder 125 and the sampling piston rod 126, and the grease is analyzed and detected through the hydrogen flame ionization detector in the spectrometer 101.

[0040] After the feeding is completed, the switching circular plate 111 returns to the initial position, and the switching motor 113 is started to drive the feeding disk 105 to rotate, so that the waste liquid conduit 106 and the connecting tube 107 are connected, and then the switching circular plate 111 moves downward, and the two injection conduits 121 are connected to the waste liquid conduit 106 respectively, and then the cleaning liquid is injected into the liquid storage chamber through the auxiliary conduit 129. The cleaning liquid enters the waste liquid conduit 106 along the injection conduit 121, and then enters the waste liquid barrel 104 through the connecting tube 107. Repeat the above steps to clean the two injection conduits 121, so as to avoid residues affecting the detection result of the next sample. Repeat the above steps to achieve continuous detection of multiple samples.

[0041] A cabinet 102 is also fixedly mounted on the spectrometer 101 and is used to protect the feeding assembly. The feeding assembly is located on the inner side of the cabinet 102 . A cabinet door 103 is symmetrically mounted on the cabinet 102 , through which the sample tube 108 can be easily installed on the feeding tray 105 .

[0042] Three air ducts 135 are arranged on the side of the spectrometer 101, and the three air ducts 135 are respectively an air inlet pipe, a hydrogen inlet pipe, and a tail gas inlet pipe. The air ducts 135 corresponding to the air inlet pipe and the hydrogen inlet pipe are connected to the corresponding pipes of the spectrometer 101, and the air duct 135 corresponding to the tail gas inlet pipe is connected to the air duct 135 corresponding to the hydrogen inlet pipe. The required gas can be transported to the hydrogen flame ionization detector in the spectrometer 101 through the three air ducts 135.

[0043] The spectrometer 101 is provided with a filter assembly, which includes a filter housing 131 and a filter housing 136. The filter housing 136 is provided with three circular filter blocks 137, and the circular filter blocks 137 are respectively used to filter the intake air of the corresponding air ducts 135. The filter housing 136 is also movably provided with three fan-shaped circular plates 138 and three fan-shaped circular plates 139. The fan-shaped circular plate 138 is used to clean the surface of the circular filter block 137, and the fan-shaped circular plate 139 is used to clean the fan-shaped circular plate 138.

[0044] The second filter housing 136 is fixedly installed on the spectrometer 101, and the first filter housing 131 is slidably installed on the spectrometer 101. A deployment lead screw 133 is rotatably installed on the spectrometer 101. The deployment lead screw 133 and the first filter housing 131 form a screw pair. A deployment motor 134 is fixedly installed on the spectrometer 101, and the output shaft of the deployment motor 134 is fixedly connected to the deployment lead screw 133. Three cleaning chambers are formed among the first filter housing 131, the second filter housing 136, and three sector circular plates 138. Three circular filter blocks 137 are respectively located in the corresponding cleaning chambers. Three air supply pipes 132 are fixedly arranged on the second filter housing 136 in a circumferential array. The axes of the air supply pipes 132 are respectively collinear with the axes of the corresponding air guide pipes 135. The air supply pipes 132 are respectively used to convey gas to the corresponding air guide pipes 135.

[0045] In the initial position, the first filter housing 131 is located at the position closest to the second filter housing 136. At this time, three cleaning chambers are formed among the first filter housing 131, the second filter housing 136, and three sector circular plates 138. Gas is injected into the corresponding chambers through the air supply pipes 132. The gas enters the corresponding air guide pipes 135 through the circular filter blocks 137 in the chambers, that is, the conveyance of gas is realized, and the gas is filtered under the action of the circular filter blocks 137, so as to prevent impurities in the gas from affecting the subsequent detection and analysis results.

[0046] Three circular filter blocks 137 are fixedly arranged on the second filter housing 136 in a circumferential array and can be replaced according to requirements. Three sector circular plates 138 are rotatably installed on the second filter housing 136 in a circumferential array. A first gear set is arranged among the three sector circular plates 138. The first gear set includes one cleaning gear ring 142 and three cleaning gears 140. The cleaning gears 140 and the cleaning gear ring 142 are both rotatably installed on the second filter housing 136. The cleaning gears 140 and the cleaning gear ring 142 form a gear pair. The cleaning gear ring 142 is respectively fixedly connected to the corresponding sector circular plates 138. Three sector circular plates 139 are rotatably installed on the second filter housing 136 in a circumferential array. A second gear set is arranged among the three sector circular plates 139. The second gear set includes one cleaning gear ring 143 and three cleaning gears 141. The cleaning gears 141 and the cleaning gear ring 143 are both rotatably installed on the second filter housing 136. The cleaning gears 141 and the cleaning gear ring 143 form a gear pair. The cleaning gear ring 143 is respectively fixedly connected to the corresponding sector circular plates 139. A first cleaning motor 144 and a second cleaning motor 115 are also fixedly installed on the second filter housing 136. The output shaft of the first cleaning motor 144 is fixedly connected to the corresponding cleaning gear 140, and the output shaft of the second cleaning motor 115 is fixedly connected to the corresponding cleaning gear 141.

[0047] When it is necessary to clean the accumulated impurities on the surface of the circular filter block 137, first start the cleaning motor 144 to drive the corresponding cleaning gear 140 to rotate. Under the action of the cleaning gear ring 142, the three cleaning gear rings 142 rotate synchronously, so that the three fan-shaped circular plates 138 rotate synchronously. The fan-shaped circular plate 138 scrapes off the impurities on the surface of the circular filter block 137, and the impurities on the circular filter block 137 accumulate in the depression of the fan-shaped circular plate 138. At this time, three closed chambers are formed between the three fan-shaped circular plates 139, the filter housing 131, and the filter housing 136, and the fan-shaped circular plates 138 are respectively located inside the corresponding closed chambers.

[0048] When the sector circular plate 138 rotates to the position where the concave part of the sector circular plate 138 faces the axis line of the sector circular plate 2 139, the sector circular plate 138 forms a closed chamber with the filter housing 2 136 and the filter housing 1 131 again, and then the cleaning motor 2 115 is started to drive the cleaning gear 2 141 to rotate. Under the action of the cleaning gear ring 2 143, the three cleaning gears 2 141 rotate synchronously, that is, the three sector circular plates 2 139 rotate synchronously. Under the action of fan-shaped circular plate 139, the accumulated impurities in the depression of fan-shaped circular plate 138 are scraped off and cleaned, and then the depression of fan-shaped circular plate 2 139 is rotated to the outside of filter housing 131. After the staff completes the cleaning, fan-shaped circular plate 138 and fan-shaped circular plate 2 139 return to their initial positions, that is, under the action of fan-shaped circular plate 138 and fan-shaped circular plate 2 139, the impurities on the surface of circular filter block 137 are cleaned, and external gas can be effectively prevented from entering the pipeline.

[0049] When the circular filter block 137 needs to be replaced, the expansion motor 134 is started to drive the expansion screw 133 to rotate, so that the filter housing 131 moves away from the filter housing 2 136, and finally the filter housing 131 moves to the position farthest from the filter housing 2 136, so as to facilitate the replacement of the circular filter block 137.

[0050] Working principle: The required gas is delivered to the hydrogen flame ionization detector in the spectrometer 101 through three air delivery pipes 132 and three air guide pipes 135, and the raw material to be tested is injected into the sample tube 108, and then the sample tube 108 is placed on the feeding tray 105 in turn, and the sample tube 108 is fixed by the fan-shaped strip plate 117, and then the raw material in the sample tube 108 is extracted through the feeding assembly, and then after dilution, it is injected into the hydrogen flame ionization detector along the injection pipe 112 for detection. After the feeding is completed, the waste liquid conduit 106 and the connecting pipe 107 are connected, and the two injection conduits 121 are cleaned in turn, and then the above steps are repeated to realize the detection of multiple test samples, and the impurities on the surface of the circular filter block 137 can be cleaned in time through the fan-shaped circular plate 138 and the fan-shaped circular plate 2 139, so as to prevent the impurities accumulated on the circular filter block 137 from affecting the gas delivery amount.

[0051] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by technicians in the relevant technical field based on the above-mentioned conception without creative work all fall within the protection scope of the present invention.

Claims

1. An automatic detection system for oil chromatography analysis, comprising a spectrometer (101), characterized in that: The spectrometer (101) is provided with a feeding assembly, the feeding assembly comprising a switching circular plate (111), a liquid injection conduit (121) symmetrically arranged on the switching circular plate (111), a switching ring plate (110) rotatably mounted on the switching circular plate (111), a sampling cylinder (124) fixedly mounted on the switching ring plate (110), a sampling piston rod (126) slidably mounted in the sampling cylinder (124), and a mixing slide rod (128) slidably mounted on the sampling piston rod (126); The spectrometer (101) is provided with three air guide tubes (135) on the side thereof. The spectrometer (101) is provided with a filter assembly, the filter assembly comprising a filter housing (131) and a filter housing (136). The filter housing (136) is provided with three circular filter blocks (137). The circular filter blocks (137) are respectively used to filter the intake air of the corresponding air guide tubes (135). The filter housing (136) is also provided with three fan-shaped circular plates (138) and three fan-shaped circular plates (139) movably. The fan-shaped circular plate (138) is used to clean the surface of the circular filter block (137), and the fan-shaped circular plate (139) is used to clean the concave part of the fan-shaped circular plate (138).

2. The automatic detection system for oil chromatography analysis according to claim 1 is characterized in that: A positioning carriage (122) is slidably mounted on the spectrometer (101), the switching circular plate (111) is rotatably mounted on the positioning carriage (122), the injection conduits (121) and the switching circular plate (111) are threadedly connected, a filter screen is provided on the inner side of one of the two injection conduits (121), a liquid storage chamber is formed between the sampling tube (124) and the sampling piston rod (126), and an auxiliary conduit (129) is also provided on the sampling piston rod (126).

3. The automatic detection system for oil chromatography analysis according to claim 2 is characterized in that: The spectrometer (101) is also rotatably mounted with a supporting circular plate (116), a feeding tray (105) is fixedly mounted on the supporting circular plate (116), a plurality of sample storage tubes (108) are movably arranged in a circle on the feeding tray (105), a plurality of positioning short columns (109) are also circumferentially arranged on the feeding tray (105), the sample storage tubes (108) are provided with through holes that cooperate with the positioning short columns (109), and a fan-shaped strip plate (117) is also rotatably mounted on the feeding tray (105), the positioning short columns (109) and the fan-shaped strip plate (117) are used to limit the position of the sample storage tubes (108) on the feeding tray (105).

4. The automatic detection system for oil chromatography analysis according to claim 3 is characterized in that: The feed tray (105) is also provided with an arc-shaped notch, and the arc-shaped notch on the feed tray (105) is used to make way for the movement of the switching circular plate (111). A waste liquid conduit (106) is also fixedly provided on the feed tray (105). A waste liquid barrel (104) is also fixedly mounted on the side of the spectrometer (101), and a connecting pipe (107) is fixedly provided on the waste liquid barrel (104). The waste liquid conduit (106) and the connecting pipe (107) are used to guide the waste liquid.

5. The automatic detection system for oil chromatography analysis according to claim 4 is characterized in that: A cabinet (102) is also fixedly mounted on the spectrometer (101), and the cabinet (102) is used to protect the feeding assembly. A cabinet door (103) is symmetrically rotatably mounted on the cabinet (102).

6. The automatic detection system for oil chromatography analysis according to claim 5, characterized in that: The three air guide pipes (135) are respectively an air inlet pipe, a hydrogen inlet pipe, and a tail gas inlet pipe; the air guide pipes (135) corresponding to the air inlet pipe and the hydrogen inlet pipe are connected to corresponding pipes of the spectrometer (101); and the air guide pipe (135) corresponding to the tail gas inlet pipe is connected to the air guide pipe (135) corresponding to the hydrogen inlet pipe.

7. The automatic detection system for oil chromatography analysis according to claim 6, characterized in that: The second filter housing (136) is fixedly mounted on the spectrometer (101), and the first filter housing (131) is slidably mounted on the spectrometer (101). Three cleaning chambers are formed between the first filter housing (131), the second filter housing (136), and the three sector-shaped circular plates (138), and the three circular filter blocks (137) are respectively located in the corresponding cleaning chambers.

8. The automatic detection system for oil chromatography analysis according to claim 7, characterized in that: Three circular filter blocks (137) are fixedly arranged in a circular array on the second filter housing (136), three sector-shaped circular plates (138) are rotatably mounted in a circular array on the second filter housing (136), a gear set (1) is arranged between the three sector-shaped circular plates (138), and three sector-shaped circular plates (139) are rotatably mounted in a circular array on the second filter housing (136), and a gear set (2) is arranged between the three sector-shaped circular plates (139).

9. The automatic detection system for oil chromatography analysis according to claim 8, characterized in that: The second filter housing (136) is also provided with three air supply pipes (132) fixedly arranged in a circumferential array. The air supply pipes (132) are respectively aligned with the axes of the corresponding air guide pipes (135). The air supply pipes (132) are respectively used to supply gas to the corresponding air guide pipes (135).

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