A near infrared spectroscopy analysis and detection device for petroleum products

Abstract

The present invention discloses a near-infrared spectrum analysis and detection device for petroleum products, and relates to the technical field of petroleum product detection, including an analysis detector, a detection cavity is provided inside the analysis detector, a limit ring is fixedly installed at the bottom of the detection cavity, a sample dish is fixedly installed in the limit ring, a cover is hinged on the top of the analysis detector, a cylinder is fixedly installed on the top of the cover, a frame is fixedly connected to the output end of the cylinder, a motor is fixedly installed in the frame, a discharging mechanism is fixedly connected to the output end of the motor, the motor drives the discharging mechanism to rotate along the circumferential direction of the sample dish, and the discharging mechanism smears the test sample on the sample dish when rotating. The present invention can effectively avoid the deviation of artificially applying petroleum products, so that the petroleum products can be more evenly attached to the bottom of the sample dish, and more accurate spectral data can be fed back when irradiated with near-infrared light, so that the results of near-infrared spectrum analysis and detection are more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum product detection, and in particular to a near-infrared spectrum analysis and detection device for petroleum products. Background Art

[0002] The basic principle of near-infrared spectroscopy is based on the absorption characteristics of substances to near-infrared light. When a sample is irradiated with near-infrared light, the vibration of chemical bonds and the rotation of molecules in it will cause light of specific wavelengths to be absorbed. These absorption spectral characteristics are closely related to the composition and structure of the sample. By measuring the absorption spectrum of the sample in the near-infrared spectral range, a series of spectral data can be obtained, which can be compared with a known spectral database to determine the composition and properties of the sample.

[0003] In the prior art, a Chinese invention patent document with a publication number of CN114088655B is proposed. The technical solution disclosed in the patent document is as follows: the invention belongs to the field of petroleum oil product detection, specifically a near-infrared spectrum analysis and detection device and detection method for petroleum oil products, including an analysis detector and a lifting mechanism; the lifting mechanism is arranged on both sides of the analysis detector; the lifting mechanism includes a lifting auxiliary plate, a moving tube, an adjustment block, a sleeve and an auxiliary spring; a fixed plate is arranged at the bottom of the analysis detector; the lifting auxiliary plate is arranged on both sides of the fixed plate; a plug-in hole is opened on the surface of the lifting auxiliary plate; the moving tube is arranged inside the plug-in hole; the adjustment block is arranged on one end of the moving tube; the sleeve is arranged on the surface of the adjustment block; by arranging the lifting mechanism, it is convenient for personnel to adjust the height of the near-infrared spectrum analysis detector, so that the near-infrared spectrum analysis detector is convenient for detection analysts of different heights to operate.

[0004] It can be seen from the technical solutions proposed in the above-mentioned invention patent documents that the above-mentioned solutions still have obvious shortcomings. For example, when using the near-infrared spectrometer in the above-mentioned technical solution to detect petroleum products, the petroleum products to be detected need to be placed in the sample dish in the detector, and the composition and properties of the petroleum products are analyzed by the spectral data obtained after irradiation with near-infrared light. Because petroleum products are mostly liquid, therefore, if the petroleum products are placed manually during the detection process, it is very easy to cause uneven distribution of petroleum products and uneven smearing thickness, resulting in different degrees of absorption of near-infrared light by petroleum products, resulting in deviations in the obtained spectral data, which greatly reduces the accuracy of detection. Therefore, the prior art urgently needs a technical solution to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a near-infrared spectroscopy analysis and detection device for petroleum products to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A near-infrared spectrum analysis and detection device for petroleum products comprises an analysis detector, a detection cavity is provided inside the analysis detector, a limit ring is fixedly installed at the bottom of the detection cavity, a sample dish is fixedly installed in the limit ring, a cover is hinged on the top of the analysis detector, a cylinder is fixedly installed on the top of the cover, an output end of the cylinder is fixedly connected to a frame, a motor is fixedly installed in the frame, a discharging mechanism is fixedly connected to the output end of the motor, the motor drives the discharging mechanism to rotate along the circumferential direction of the sample dish, and the discharging mechanism smears a test sample on the sample dish when rotating.

[0008] The discharging mechanism includes a transmission component and a rotary rolling component, the rotary rolling component includes a connecting rod fixedly connected to the output end of the motor, the outer portion of the connecting rod is sleeved with a hollow tube, the bottom of the hollow tube is fixedly connected to a hollow tube, both ends of the hollow tube are rotatably connected to rolling rods, the ends of both ends of the hollow tube are rotatably connected to gears, and the gears are fixedly connected to the rolling rods, a toothed disc is fixedly installed in the sample dish, and the toothed disc is meshed with the gears, a plurality of discharging holes are opened on the rod body of the hollow tube, a plurality of docking channels for matching the discharging holes are opened on the rolling rod, the transmission component is fixedly installed on the top of the machine cover, and the transmission component is connected to the bottom of the hollow tube.

[0009] Based on a preferred solution provided by a near-infrared spectral analysis and detection device for petroleum products, the transmission component includes an output pump fixedly mounted on the top of the machine cover, a hose is fixedly connected to one side of the output pump, the hose is connected to the hollow tube, and a rotating connection component connected to the hose is rotatably sleeved on the outside of the hollow tube, and the hose is connected to the inside of the hollow tube through the rotating connection component.

[0010] Based on a preferred solution provided by a near-infrared spectroscopy analysis and detection device for petroleum products, the rotating connection assembly includes an adapter ring fixedly connected to the bottom of the hose, and the adapter ring is rotatably sleeved on the outer bottom of the hollow tube, and the bottom side wall of the hollow tube is provided with a plurality of avoidance grooves for the entry of oil products.

[0011] A preferred solution provided by a near-infrared spectral analysis and detection device for petroleum products is that a closed ring is fixedly installed on the inner side of the hollow tube, and the closed ring is slidably sleeved on the outside of the connecting rod, a top support plate is fixedly installed on the connecting rod, a spring is sleeved on the connecting rod, and one end of the spring is pressed against the bottom of the top support plate, and the other end is pressed against the top of the closed ring.

[0012] According to a preferred solution provided by a near-infrared spectroscopy analysis and detection device for petroleum products, the aperture of each docking channel decreases in a direction away from the axis of the rolling rod.

[0013] Based on a preferred solution provided by a near-infrared spectroscopy analysis and detection device for petroleum products, an air pump is fixedly installed on the top of the machine cover, and the air pump is connected to the inside of the hose, a plurality of drainage holes are opened at the bottom of the toothed disc, a plurality of water outlet holes corresponding to the drainage holes are opened at the bottom of the limiting ring, a water retaining ring is fixedly installed at the bottom of the detection cavity, and the water retaining ring and the top of the limiting ring are fixedly connected with the same sealing cover, an extension tube is fixedly connected to one side of the water retaining ring, a suction pump is fixedly installed on the side wall of the machine cover, and the suction pump is fixedly connected to one end of the extension tube away from the water retaining ring.

[0014] A preferred solution provided by a near-infrared spectroscopy analysis and detection device for petroleum products is that a socket is opened on the side wall of the machine cover, a plug plate is slidably installed in the socket, and a receiving groove for inserting the plug plate is fixedly installed on the side wall of the detection cavity.

[0015] According to a preferred solution provided by a near-infrared spectroscopy analysis and detection device for petroleum products, a funnel is fixedly installed on the top of the output pump.

[0016] Due to the adoption of the above technical scheme, the technical progress achieved by the present invention compared with the prior art is as follows: the present invention adopts a rolling and crushing method to coat the petroleum product on the sample dish, which can effectively avoid the deviation of manual coating of the petroleum product, so that the petroleum product can be more evenly attached to the bottom of the sample dish, and more accurate spectral data can be fed back when irradiated with near-infrared light, so that the results of near-infrared spectral analysis and detection are more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 For the present invention Figure 1 A schematic diagram of the structure at A;

[0020] Figure 3 It is a structural schematic diagram of the analysis and detection instrument in the present invention;

[0021] Figure 4 This is a schematic diagram of the overall structure of the present invention without the cover;

[0022] Figure 5 For the present invention Figure 4 A schematic diagram of the structure at B;

[0023] Figure 6 For the present invention Figure 4 A side cross-sectional view of

[0024] Figure 7 For the present invention Figure 6 An enlarged schematic diagram of point C;

[0025] Figure 8 For the present invention Figure 6 An enlarged schematic diagram of point D.

[0026] In the figure: 1. Analytical detector; 11. Detection cavity; 111. Receiving notch; 12. Machine cover; 121. Socket; 2. Limiting ring; 21. Water outlet; 3. Sample dish; 4. Cylinder; 5. Frame; 6. Motor; 7. Discharging mechanism; 8. Transmission assembly; 81. Output pump; 82. Hose; 83. Adapter ring; 84. Spring; 9. Rotating rolling assembly; 91. Connecting rod; 9 11. Top support plate; 92. Hollow tube; 921. Avoidance slot; 922. Closing ring; 93. Hollow tube; 931. Discharge hole; 94. Rolling rod; 941. Docking channel; 95. Gear; 96. Toothed disc; 961. Drain hole; 101. Air pump; 102. Sealing cover; 103. Extension tube; 104. Suction pump; 105. Insert plate; 106. Funnel; 107. Water retaining ring. DETAILED DESCRIPTION

[0027] 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.

[0028] The following first describes the concepts involved in the present application in conjunction with the accompanying drawings. It should be noted that the following description of each concept is only to make the content of the present application easier to understand, and does not limit the scope of protection of the present application; at the same time, the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflict. The present application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

[0029] Example

[0030] like Figures 1 to 8As shown, the present invention provides a near-infrared spectrum analysis and detection device for petroleum products, including an analysis and detection instrument 1, a detection cavity 11 is opened inside the analysis and detection instrument 1, a limit ring 2 is fixedly installed at the bottom of the detection cavity 11, a sample dish 3 is fixedly installed in the limit ring 2, a cover 12 is hinged on the top of the analysis and detection instrument 1, a cylinder 4 is fixedly installed on the top of the cover 12, an output end of the cylinder 4 is fixedly connected to a frame 5, a motor 6 is fixedly installed in the frame 5, a discharging mechanism 7 is fixedly connected to the output end of the motor 6, the motor 6 drives the discharging mechanism 7 to rotate along the circumferential direction of the sample dish 3, and the discharging mechanism 7 smears the test sample on the sample dish 3 when rotating.

[0031] The discharging mechanism 7 includes a transmission component 8 and a rotary rolling component 9. The rotary rolling component 9 includes a connecting rod 91 fixedly connected to the output end of the motor 6. A hollow tube 92 is sleeved on the outside of the connecting rod 91. A hollow tube 93 is fixedly connected to the bottom of the hollow tube 92, and the hollow tube 92 is connected to the hollow tube 93. Both ends of the hollow tube 93 are rotatably connected to rolling rods 94. The ends of both ends of the hollow tube 93 are rotatably connected to gears 95, and the gear 95 is fixedly connected to the rolling rod 94. A toothed disk 96 is fixedly installed in the sample dish 3, and the toothed disk 96 is meshed with the gear 95. A plurality of discharging holes 931 are provided on the rod body of the hollow tube 93, and a plurality of docking channels 941 for matching the discharging holes 931 are provided on the rolling rod 94. The transmission component 8 is fixedly installed on the top of the machine cover 12, and the transmission component 8 is connected to the bottom of the hollow tube 92.

[0032] As a further explanation of the embodiments of the present invention, when the near-infrared spectrometer detects petroleum products, the petroleum products to be detected need to be placed in the sample dish 3 in the detector, and the composition and properties of the petroleum products are analyzed by the spectral data obtained after irradiation with near-infrared light. Because petroleum products are mostly liquid, if the petroleum products are placed manually during the detection process, it is very easy to cause uneven distribution and uneven smearing of the petroleum products, resulting in different degrees of absorption of near-infrared light by the petroleum products, resulting in deviations in the obtained spectral data, which greatly reduces the accuracy of the detection.

[0033] In this embodiment, petroleum products are input from the transmission component 8 into the hollow tube 92 in the rotary rolling component 9, so that the petroleum products flow into the hollow tube 93, and then pass through the discharge hole 931 and the docking channel 941 in sequence to adhere to the outside of the rolling rod 94. In this process, since the hollow tube 93 is relatively long, in order to prevent the petroleum products from all flowing out from the discharge hole 931 and the docking channel 941 near the hollow tube 92, resulting in uneven sample smearing, it is necessary to directly fill a proper amount of petroleum products into the hollow tube 93 before sample smearing, or when the discharge hole 931 and the docking channel 941 are not connected, and drive the hollow tube 93 to rotate through the motor 6. Since the friction between the rolling rod 94 and the sample dish 3 is small when rolling, in order to prevent the rolling rod 94 from During the rolling process, the gear 95 and the toothed disc 96 mesh and transmit, driving the rolling rod 94 to rotate on the hollow tube 93, so that the petroleum oil attached to the rolling rod 94 is evenly coated on the inner bottom of the sample dish 3 along the circumferential direction of the sample dish 3, and then the petroleum oil on the sample dish 3 is irradiated with near-infrared light by the analysis and detection instrument 1, and the composition and properties of the petroleum oil can be detected by the obtained spectral data. The present invention adopts the rolling and rolling method to coat the petroleum oil on the sample dish 3, which can effectively avoid the deviation of artificial coating of petroleum oil, so that the petroleum oil can be more evenly attached to the bottom of the sample dish 3, and more accurate spectral data can be fed back when irradiated with near-infrared light, so that the result of near-infrared spectral analysis and detection is more accurate.

[0034] Furthermore, the transmission component 8 includes an output pump 81 fixedly mounted on the top of the machine cover 12, a hose 82 is fixedly connected to one side of the output pump 81, a rotating connection component connected to the hose 82 is rotatably sleeved on the outside of the hollow tube 92, and the hose 82 is connected to the inside of the hollow tube 92 through the rotating connection component.

[0035] Furthermore, the rotating connection assembly includes an adapter ring 83 fixedly connected to the bottom of the hose 82, and the adapter ring 83 is rotatably sleeved on the outer bottom of the hollow tube 92, and the bottom side wall of the hollow tube 92 is provided with a plurality of avoidance grooves 921 for oil to enter.

[0036] As a further illustration of an embodiment of the present invention, the transmission component 8 in this embodiment is used to input petroleum products into the hollow tube 93. Specifically, the petroleum products are poured into the hollow tube 93 from one end of the output pump 81, and the pressure provided by the output pump 81 allows the petroleum to pass through the hose 82, and then pass through the avoidance groove 921 to enter the hollow tube 93. After the petroleum products enter the hollow tube 93, they pass through the discharge hole 931 and the docking channel 941 in sequence, and finally adhere to the surface of the rolling rod 94, so that the rolling rod 94 can smear the petroleum products on the sample dish 3 during the rolling process.

[0037] Furthermore, a closed ring 922 is fixedly installed on the inner side of the hollow tube 92, and the closed ring 922 is slidably sleeved on the outside of the connecting rod 91. A top support plate 911 is fixedly installed on the connecting rod 91. A spring 84 is sleeved on the connecting rod 91, and one end of the spring 84 is pressed against the bottom of the top support plate 911, and the other end is pressed against the top of the closed ring 922.

[0038] As a further explanation of the embodiment of the present invention, in this embodiment, the cylinder 4 is used to drive the entire discharging mechanism 7 to approach or move away from the sample dish 3. Therefore, when the cylinder 4 drives the hollow tube 92 to approach the sample dish 3, the gear 95 conflicts with the convex teeth on the toothed disk 96, and the rolling rod 94 does not fit the bottom of the sample dish 3. Therefore, there is a certain gap between the sample dish 3 and the rolling rod 94. When the motor 6 drives the hollow tube 93 to rotate, the elastic force generated by the deformation of the spring 84 conflicts with the closed ring 922, so that the hollow tube 93 is always subjected to a downward force, thereby making the rolling rod 94 fit with the sample dish 3, so that the petroleum oil attached to the rolling rod 94 can contact the sample dish 3.

[0039] Furthermore, the diameter of each docking hole 941 gradually decreases along the axial direction away from the rolling rod 94 .

[0040] As a further illustration of an embodiment of the present invention, in this embodiment, the docking channel 941 has the function of limiting the flow rate and outflow size of the petroleum product. Specifically, when the petroleum product enters the docking channel 941 from one end, the aperture of the docking channel 941 gradually decreases, and the flow rate of the petroleum product in the docking channel 941 will gradually decrease, so that the volume of the petroleum product flowing out of the docking channel 941 and attached to the surface of the rolling rod 94 is relatively small, thereby avoiding excessive outflow of petroleum products and avoiding dripping onto the sample dish 3 during the rotation of the rolling rod 94, causing uneven rolling of the rolling rod 94.

[0041] Furthermore, an air pump 101 is fixedly installed on the top of the machine cover 12, and the air pump 101 is connected to the inside of the hose 82. A plurality of drainage holes 961 are opened at the bottom of the toothed disc 96, and a plurality of water outlet holes 21 corresponding to the drainage holes 961 are opened at the bottom of the limiting ring 2. A water retaining ring 107 is fixedly installed at the bottom of the detection cavity 11, and the water retaining ring 107 and the top of the limiting ring 2 are fixedly connected with the same sealing cover 102, an extension tube 103 is fixedly connected to one side of the water retaining ring 107, a suction pump 104 is fixedly installed on the side wall of the machine cover 12, and the suction pump 104 is fixedly connected to one end of the extension tube 103 away from the water retaining ring 107.

[0042] As a further illustration of an embodiment of the present invention, after the petroleum oil product detection is completed, the sample dish 3 and various pipelines in the device need to be cleaned, and manual cleaning is inconvenient, so the prepared cleaning solution is poured from one end of the output pump 81, and the cleaning solution is input into the sample dish 3 along the petroleum oil product entry route, and the petroleum oil products attached to the pipeline are rinsed and cleaned by the pressure provided by the output pump 81, and the motor 6 is started again to remove the petroleum oil products attached to the sample dish 3. A large amount of cleaning solution and the cleaned petroleum oil turbid liquid (referred to as waste liquid) generated during the cleaning process pass through the drainage hole 961 and the water outlet hole 21 in turn into the channel formed between the water retaining ring 107 and the limiting circular ring 2, and then the channel is blocked by the cover 102 to form a relatively closed space, and the waste liquid is extracted from the extension tube 103 by the suction provided by the suction pump 104, and finally the air pump 101 is started to inject air into the hose 82 to accelerate the air flow in the device, so that the sample dish 3 and the pipeline are accelerated to dry, so as to complete the overall cleaning steps.

[0043] Furthermore, a socket 121 is provided on the side wall of the cover 12 , and a plug board 105 is slidably installed in the socket 121 . A receiving slot 111 for inserting the plug board 105 is fixedly installed on the side wall of the detection cavity 11 .

[0044] As a further explanation of the embodiment of the present invention, in this embodiment, after the petroleum oil product is applied, in order to ensure a better near-infrared light absorption and reflection environment, the discharge mechanism 7 is stored as a whole through the cylinder 4 and completely separated from the sample dish 3, and then the plug plate 105 is inserted along the socket 121, so that the space above the sample dish 3 is completely closed, ensuring that the light point after the near-infrared light irradiates the petroleum oil product is the bottom of the plug plate 105, further improving the accuracy of the test data.

[0045] Furthermore, a funnel 106 is fixedly mounted on the top of the output pump 81 .

[0046] As a further illustration of the embodiment of the present invention, the petroleum oil or cleaning solution can be injected into the output pump 81 more quickly through the funnel 106, thereby improving the overall efficiency of the experiment.

[0047] The embodiments and / or implementation methods described above are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any form. Any technical personnel in this field may make slight changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention.

[0048] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the invention to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A near infrared spectroscopy analysis and detection device for petroleum oil products, comprising an analysis and detection instrument (1), characterized in that: The analysis and detection instrument (1) has a detection cavity (11) formed inside, a limit ring (2) is fixedly mounted at the bottom of the detection cavity (11), a sample dish (3) is fixedly mounted inside the limit ring (2), a cover (12) is hingedly mounted on the top of the analysis and detection instrument (1), a cylinder (4) is fixedly mounted on the top of the cover (12), an output end of the cylinder (4) is fixedly connected to a frame (5), a motor (6) is fixedly mounted inside the frame (5), a discharge mechanism (7) is fixedly connected to the output end of the motor (6), the motor (6) drives the discharge mechanism (7) to rotate along the circumferential direction of the sample dish (3), and the discharge mechanism (7) smears the test sample on the sample dish (3) when rotating; The discharging mechanism (7) comprises a transmission component (8) and a rotary rolling component (9), wherein the rotary rolling component (9) comprises a connecting rod (91) fixedly connected to the output end of the motor (6), the outer portion of the connecting rod (91) is sleeved with a hollow tube (92), the bottom of the hollow tube (92) is fixedly connected with a hollow tube (93), and the hollow tube (92) is communicated with the hollow tube (93), both ends of the hollow tube (93) are rotatably connected to rolling rods (94), and the ends of both ends of the hollow tube (93) are rotatably connected to gears (95 ), and the gear (95) is fixedly connected to the rolling rod (94), a toothed disc (96) is fixedly installed in the sample dish (3), and the toothed disc (96) is meshed with the gear (95), a plurality of discharge holes (931) are provided on the rod body of the hollow tube (93), a plurality of docking channels (941) for matching the discharge holes (931) are provided on the rolling rod (94), the transmission component (8) is fixedly installed on the top of the machine cover (12), and the transmission component (8) is communicated with the bottom of the hollow tube (92); A closed ring (922) is fixedly installed on the inner side of the hollow tube (92), and the closed ring (922) is slidably sleeved on the outside of the connecting rod (91). A top support plate (911) is fixedly installed on the connecting rod (91), and a spring (84) is sleeved on the connecting rod (91), and one end of the spring (84) is pressed against the bottom of the top support plate (911), and the other end is pressed against the top of the closed ring (922).

2. The near infrared spectroscopy analysis and detection device for petroleum oil products according to claim 1, characterized in that: The transmission component (8) comprises an output pump (81) fixedly mounted on the top of the machine cover (12); a hose (82) is fixedly connected to one side of the output pump (81); the hose (82) is connected to the hollow tube (92); a rotating connection component connected to the hose (82) is rotatably sleeved on the outside of the hollow tube (92); and the hose (82) is connected to the inside of the hollow tube (92) via the rotating connection component.

3. The near infrared spectroscopy analysis and detection device for petroleum oil products according to claim 2, characterized in that: The rotating connection assembly comprises an adapter ring (83) fixedly connected to the bottom of the hose (82), and the adapter ring (83) is rotatably sleeved on the outer bottom of the hollow tube (92), and the bottom side wall of the hollow tube (92) is provided with a plurality of avoidance grooves (921) for oil to enter.

4. The near infrared spectroscopy analysis and detection device for petroleum oil products according to claim 1, characterized in that: The diameter of each docking hole (941) decreases along the axial direction away from the rolling rod (94).

5. The near infrared spectroscopy analysis and detection device for petroleum oil products according to claim 3, characterized in that: An air pump (101) is fixedly mounted on the top of the machine cover (12), and the air pump (101) is connected to the inside of the hose (82); a plurality of drainage holes (961) are provided at the bottom of the toothed disc (96); a plurality of water outlet holes (21) corresponding to the drainage holes (961) are provided at the bottom of the limiting ring (2); a water retaining ring (107) is fixedly mounted on the bottom of the detection cavity (11), and the water retaining ring (107) and the top of the limiting ring (2) are fixedly connected to the same sealing cover (102); an extension tube (103) is fixedly connected to one side of the water retaining ring (107); a suction pump (104) is fixedly mounted on the side wall of the machine cover (12), and the suction pump (104) is fixedly connected to one end of the extension tube (103) away from the water retaining ring (107).

6. The near infrared spectroscopy analysis and detection device for petroleum oil products according to claim 1, characterized in that: The side wall of the machine cover (12) is provided with a socket (121), a plug plate (105) is slidably installed in the socket (121), and a receiving slot (111) for inserting the plug plate (105) is fixedly installed on the side wall of the detection cavity (11).

7. The near infrared spectroscopy analysis and detection device for petroleum oil products according to claim 2, characterized in that: A funnel (106) is fixedly mounted on the top of the output pump (81).

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