Chromatographic device for detecting industrial hemp

Abstract

The invention discloses a chromatographic device for detecting industrial cannabis sativa, the chromatographic device comprises a detector body and a recovery device, the detector body is connected with the recovery device through a liquid inlet pipe, the top end of a telescopic pipe of the recovery device is fixedly arranged at the top end of a box body of the recovery device through a first square frame, and the bottom end of the telescopic pipe is provided with a second square frame; the second square frame is arranged in the box body in an up-down moving mode, and a third square frame corresponding to the second square frame is fixedly arranged at the top end of the collecting bin; a filter paper roll is arranged between the first winding roller and the second winding roller, frame strips matched with the second square frame and the third square frame are arranged on the filter paper roll, and filter screens are arranged in the frame strips. The chromatographic device for detecting the industrial hemp is simple in structure, ingenious in design and practical in function, and effectively solves the problems that a filter plate of a filter box of an existing chromatographic instrument for detecting the industrial hemp needs to be manually replaced, the automation degree is low, and the working efficiency of equipment is affected.

Description

Technical Field

[0001] The present invention relates to the field of detection equipment, and in particular to a chromatographic device for detecting industrial hemp. Background Art

[0002] Industrial hemp refers to cannabis with a THC content of less than 0.3%. In China, industrial hemp is referred to as hemp. It is an annual herbaceous plant of the genus Cannabis in the family Cannabinaceae. It is categorized as both industrial hemp and drug hemp, with industrial hemp being the most widely used both domestically and internationally. The powder made from the cores of industrial hemp, also known as ultrafine powder modified coating technology for hemp cores, is used in military uniforms to enhance the product's high strength and performance. However, the industrial extraction of cannabidiol (CBD) typically uses young leaves and buds, which have a high content of active cannabinoids. The THC content produced during the extraction process is often higher than 0.3%. Therefore, even when growing industrial hemp varieties, THC content still needs to be monitored during extraction. For this reason, the extract is often tested using high-performance liquid chromatography (HPLC) and quantified using an external standard method, enabling accurate and rapid determination of CBD and THC content in cannabis flowers and leaves. Patent application number 202022971779.5 discloses a chromatograph for detecting industrial hemp. This device utilizes a filter box equipped with multiple filter plates to recover, filter, and reuse the solvent after testing, thus reducing testing costs. However, the filter plates in this filter box require manual replacement, resulting in a low degree of automation and affecting the device's efficiency. Therefore, developing a new chromatograph for detecting industrial hemp has become a pressing issue for those skilled in the art. Summary of the Invention

[0003] The purpose of the present invention is to provide a chromatography device for detecting industrial hemp, so as to solve the problem that the filter plate of the filter box of the existing chromatograph for detecting industrial hemp needs to be manually replaced, the degree of automation is low, and the working efficiency of the equipment is affected.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention provides a chromatographic device for detecting industrial hemp, comprising a detector body and a recovery device, wherein the detector body is connected to the recovery device via a liquid inlet pipe, the liquid inlet pipe is provided with a solenoid valve, the recovery device comprises a telescopic tube, a first roller, a second roller and a collecting bin, the top end of the telescopic tube is fixedly arranged at the top end of a housing of the recovery device via a first square frame, the bottom end of the telescopic tube is provided with a second square frame, the second square frame is movably arranged in the housing, the top end of the collecting bin is fixedly provided with a third square frame corresponding to the second square frame; a filter paper roll is provided between the first roller and the second roller, the filter paper roll is provided with a border strip cooperating with the second square frame and the third square frame, and a filter screen is provided in the border strip.

[0006] Furthermore, the upper surface of the border strip cooperates with the lower surface of the second square frame; and the lower surface of the border strip cooperates with the upper surface of the third square frame.

[0007] Furthermore, a first photoelectric switch is provided on the left side of the box, a second photoelectric switch is provided on the right side of the box, a first reflective strip cooperating with the first photoelectric switch is provided on the left side of the border strip of the filter paper roll, and a second reflective strip cooperating with the second photoelectric switch is provided on the right side of the border strip of the filter paper roll.

[0008] Furthermore, a drum motor is provided in the second roller; and rollers cooperating with the filter paper roll are provided on both sides of the third rectangular frame.

[0009] Furthermore, a first slide is fixedly provided at the left end of the second square frame, a second slide is fixedly provided at the right end of the second square frame, a slide rod cooperating with the first slide is fixedly provided at the top of the box body, a lead screw cooperating with the second slide is rotatably provided at the top of the box body, and the lead screw is driven by a drive motor at the top of the box body.

[0010] Furthermore, a first liquid outlet is provided at the front end of the collecting bin.

[0011] Furthermore, a collecting pool cooperating with the first liquid outlet and the second roller is provided at the lower end of the box body, and a second liquid outlet cooperating with the collecting pool is provided on the side wall of the box body.

[0012] Furthermore, a guide slope cooperating with the second roller and the collection pool is provided on the side wall of the collection bin.

[0013] Furthermore, the detector body is connected to the sampling device via a chromatographic column, and the chromatographic column is connected to the solvent storage via a delivery pump and a delivery tube.

[0014] Furthermore, a door leaf is provided on the front end surface of the box body of the recovery device through a hinge.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] The chromatographic device for detecting industrial hemp of the present invention is configured such that a whole roll of filter paper is arranged between a second square frame and a third rectangular frame. When the filter screen does not meet the filtering requirements for solvent recovery, the drum motor drives the first roller and the second roller to rotate, automatically switching to the next filter screen on the filter paper roll, with a high degree of automation. The filter screen edge of the chromatographic device for detecting industrial hemp of the present invention is provided with a frame strip, which effectively enhances the overall strength of the filter paper roll and avoids breaking, and the frame strip can fit with the second square frame and the third rectangular frame to prevent solvent overflow. The bottom end of the housing of the chromatographic device for detecting industrial hemp of the present invention is provided with a recovery pool, which is convenient for recovering the solvent squeezed out of the waste filter paper by the second roller. In general, the chromatographic device for detecting industrial hemp of the present invention has a simple structure, an ingenious design, and practical functions. It effectively solves the problem that the filter plate of the filter box of the existing chromatograph for detecting industrial hemp needs to be manually replaced, the degree of automation is low, and the working efficiency of the equipment is affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of the chromatography device for detecting industrial hemp in the present invention;

[0019] Figure 2 This is a schematic diagram of the recovery device structure;

[0020] Figure 3 It is a cross-sectional view of the recovery device;

[0021] Figure 4 This is a top view of the filter paper roll;

[0022] Figure 5 This is the front view of the filter paper roll.

[0023] Explanation of reference numerals: 1. detector body; 2. chromatographic column; 3. sample injection device; 4. delivery pump; 5. delivery pipe; 6. solvent storage; 7. recovery device; 701. housing; 702. door leaf; 703. liquid inlet pipe; 704. solenoid valve; 705. first square frame; 706. second square frame; 707. third square frame; 708. telescopic tube; 709. first slide; 710. second slide; 711 , slide rod; 712, lead screw; 713, drive motor; 714, first photoelectric switch; 715, second photoelectric switch; 716, first roller; 717, second roller; 718, support roller; 719, collection bin; 720, first liquid outlet; 721, collection tank; 722, second liquid outlet; 8, filter paper roll; 801, first reflective strip; 802, second reflective strip; 803, border strip; 804, filter screen. DETAILED DESCRIPTION

[0024] like Figures 1 to 5 As shown, a chromatographic device for detecting industrial hemp includes a detector body 1 and a recovery device 7. The detector body 1 is connected to a sample injection device 3 through a chromatographic column 2, and the chromatographic column 2 is connected to a solvent reservoir 6 through a delivery pump 4 and a delivery pipe 5.

[0025] The detector body 1 is connected to the recovery device 7 via a liquid inlet pipe 703, and a solenoid valve 704 is provided on the liquid inlet pipe 703. A door leaf 702 is provided on the front end surface of the box body 701 of the recovery device 7 via a hinge.

[0026] The recovery device 7 includes a telescopic tube 708, a first roller 716, a second roller 717 and a collection bin 719. The top of the telescopic tube 708 is fixedly arranged at the top of the box body 701 of the recovery device 7 through a first square frame 705. The bottom end of the telescopic tube 708 is provided with a second square frame 706. The second square frame 706 is movably arranged in the box body 701. Specifically, the left end of the second square frame 706 is fixedly provided with a first slide 709, and the right end of the second square frame 706 is fixedly provided with a second slide 710. The top end of the box body 701 is fixedly provided with a slide rod 711 that cooperates with the first slide 709. The top end of the box body 701 is rotatably provided with a screw 712 that cooperates with the second slide 710. The second slide 710 is threadedly engaged with the screw 712. The screw 712 is driven by a drive motor 713 at the top end of the box body 701.

[0027] A third square frame 707 corresponding to the second square frame 706 is fixedly provided on the top of the collecting bin 719 .

[0028] A filter paper roll 8 is provided between the first roller 716 and the second roller 717 , and a drum motor is provided inside the second roller 717 ; rollers 718 cooperating with the filter paper roll 8 are provided on both sides of the third rectangular frame 707 .

[0029] The filter paper roll 8 is provided with a border strip 803 that cooperates with the second square frame 706 and the third square frame 707 , and a filter screen 804 is provided in the border strip 803 .

[0030] Specifically, the upper surface of the border strip 803 cooperates with the lower surface of the second square frame 706 ; the lower surface of the border strip 803 cooperates with the upper surface of the third square frame 707 .

[0031] A first photoelectric switch 714 is provided on the left side of the box body 701, and a second photoelectric switch 715 is provided on the right side of the box body 701. A first reflective strip 801 cooperating with the first photoelectric switch 714 is provided on the left side of the border strip 803 of the filter paper roll 8, and a second reflective strip 802 cooperating with the second photoelectric switch 715 is provided on the right side of the border strip 803 of the filter paper roll 8.

[0032] A first liquid outlet 720 is provided at the front end of the collecting chamber 719 .

[0033] The lower end of the box body 701 is provided with a collection pool 721 that cooperates with the first liquid outlet 720 and the second roller 717. The side wall of the box body 701 is provided with a second liquid outlet 722 that cooperates with the collection pool 721. The side wall of the collection chamber 719 is provided with a diversion slope that cooperates with the second roller 717 and the collection pool 721.

[0034] The working process of the present invention is as follows:

[0035] The solvent in the solvent reservoir 6 is pressurized by the delivery pump 4 and flows into the chromatographic column 2 to wait for mixing. The infusion tube between the delivery pump 4 and the chromatographic column 2 is connected to the injection device 3, and the outlet of the chromatographic column 2 is connected to the detector body 1. After the injection solvent of the injection device 3 is mixed with the mobile phase solvent in the chromatographic column 2, the solvent flows to the detector body 1 to complete the detection. The outlet of the detector body 1 is connected to the recovery device 7.

[0036] The solvent enters the telescopic tube 708 through the liquid inlet pipe 703 of the recovery device 7 and is filtered through the filter screen 804 between the third square frame 707 and the second square frame 706 before arriving at the collection chamber 719 .

[0037] When the filter screen 804 cannot meet the solvent recovery demand, the driving motor 713 drives the telescopic tube 708 and the second square frame 706 to move upward through the screw 712 and the second slide 710; the second roller 717 drives the first roller 716 to rotate through the filter paper roll 8, so that the discarded filter screen 804 is wound on the second roller 717, and the new filter screen 804 is unfolded from the first roller 716; when the first photoelectric switch 714 and the second photoelectric switch 715 both detect the reflective strip, the second roller 717 and the first roller 716 stop rotating, and the driving motor 713 drives the telescopic tube 708 and the second square frame 706 to move downward through the screw 712 and the second slide 710, and the second square frame 706 and the third square frame 707 press the border strip 803 of the new filter screen 804.

[0038] The chromatographic device for detecting industrial hemp of the present invention arranges a whole roll of filter paper 8 between the second square frame 706 and the third square frame 707. When the filter screen 804 does not meet the filtering requirements of solvent recovery, the drum motor drives the first roller 716 and the second roller 717 to rotate, automatically switching to the next filter screen 804 on the filter paper roll 8. The degree of automation is high, which effectively solves the problem that the filter plate of the filter box of the existing chromatograph for detecting industrial hemp needs to be manually replaced, the degree of automation is low, and the working efficiency of the equipment is affected.

[0039] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A chromatographic device for detecting industrial hemp, characterized by: The invention comprises a detector body (1) and a recovery device (7), wherein the detector body (1) is connected to the recovery device (7) via a liquid inlet pipe (703), and the liquid inlet pipe (703) is provided with a solenoid valve (704). The recovery device (7) comprises a telescopic tube (708), a first roller (716), a second roller (717) and a collection bin (719), wherein the top end of the telescopic tube (708) is fixedly arranged on the top end of the box (701) of the recovery device (7) via a first square frame (705), and the bottom end of the telescopic tube (708) is provided with a A second square frame (706) is provided in a box body (701) so as to be movable up and down, and a third square frame (707) corresponding to the second square frame (706) is fixedly provided at the top of the collecting bin (719); a filter paper roll (8) is provided between the first roller (716) and the second roller (717), and a frame strip (803) cooperating with the second square frame (706) and the third square frame (707) is provided on the filter paper roll (8), and a filter net (804) is provided in the frame strip (803).

2. The chromatographic device for detecting industrial hemp according to claim 1, characterized in that: The upper surface of the frame strip (803) cooperates with the lower surface of the second square frame (706); the lower surface of the frame strip (803) cooperates with the upper surface of the third square frame (707).

3. The chromatographic device for detecting industrial hemp according to claim 1, characterized in that: A first photoelectric switch (714) is provided on the left side of the box (701), a second photoelectric switch (715) is provided on the right side of the box (701), a first reflective strip (801) cooperating with the first photoelectric switch (714) is provided on the left side of the border strip (803) of the filter paper roll (8), and a second reflective strip (802) cooperating with the second photoelectric switch (715) is provided on the right side of the border strip (803) of the filter paper roll (8).

4. The chromatographic device for detecting industrial hemp according to claim 1, characterized in that: A drum motor is provided inside the second roller (717); and rollers (718) cooperating with the filter paper roll (8) are provided on both sides of the third rectangular frame (707).

5. The chromatographic device for detecting industrial hemp according to claim 1, characterized in that: A first slide (709) is fixedly provided at the left end of the second square frame (706), a second slide (710) is fixedly provided at the right end of the second square frame (706), a slide rod (711) that cooperates with the first slide (709) is fixedly provided at the top end of the box body (701), and a lead screw (712) that cooperates with the second slide (710) is rotatably provided at the top end of the box body (701), and the lead screw (712) is driven by a driving motor (713) at the top end of the box body (701).

6. The chromatographic device for detecting industrial hemp according to claim 1, characterized in that: The front end of the collecting chamber (719) is provided with a first liquid outlet (720).

7. The chromatographic device for detecting industrial hemp according to claim 6, characterized in that: The lower end of the box body (701) is provided with a collecting pool (721) that cooperates with the first liquid outlet (720) and the second roller (717), and the side wall of the box body (701) is provided with a second liquid outlet (722) that cooperates with the collecting pool (721).

8. The chromatographic device for detecting industrial hemp according to claim 6, characterized in that: A guide slope cooperating with the second roller (717) and the collection pool (721) is provided on the side wall of the collection bin (719).

9. The chromatographic device for detecting industrial hemp according to claim 6, characterized in that: The detector body (1) is connected to a sample injection device (3) via a chromatographic column (2), and the chromatographic column (2) is connected to a solvent storage device (6) via a delivery pump (4) and a delivery pipe (5).

10. The chromatographic device for detecting industrial hemp according to claim 6, characterized in that: A door leaf (702) is provided on the front end surface of the box body (701) of the recovery device (7) via a hinge.

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