A flour sampling device

Abstract

The application discloses a flour sampling device and particularly relates to the technical field of flour production, which comprises a first sleeve slidingly arranged on the side wall of a conveying pipe, a plurality of feeding holes are uniformly arranged on the first sleeve, drive mechanisms are symmetrically arranged on the two sides of the first sleeve and used for driving the first sleeve to move up and down, a discharging assembly is arranged at the bottom of the first sleeve and used for cooperating with the first sleeve to move up and down and rotate relatively, a plurality of staggered stirring rods are arranged in the discharging assembly, and a double-layer sampling mechanism is arranged at the bottom of the discharging assembly; through the cooperation of the lifting rod, the transmission assembly, the first sleeve and the cover cap, when the first sleeve is driven by the lifting rod to move upwards or downwards, the feeding holes at the top of the first sleeve are closed or opened, so that the device can sample flour at different levels; at the same time, the transmission assembly is driven by the lifting rod at the bottom to make the rotating assembly reciprocate and rotate to screen out the impurities of the flour conveyed into the rotating assembly, and finally the sampled flour is convenient for subsequent detection.

Description

Technical Field

[0001] This invention relates to the field of flour production technology, specifically to a flour sampling device. Background Technology

[0002] Patent publication number CN208520635U discloses a flour sampling device, including a sampling cup, a conveying pipe, and a sampling tube. A sampling port is provided at the bottom of the conveying pipe, and the sampling tube is welded to the sampling port on the outer wall of the conveying pipe. A sampling end cap adapted to the sampling port is provided inside the sampling port. An inner convex ring is provided on the inner wall of the sampling tube, and at least two springs are provided on the upper end face of the inner convex ring. The other end of the springs is connected to the sampling end cap. A feed inlet is provided at the top of the sampling cup, and an outer convex ring is provided on the outer wall of the sampling cup. The outer diameter of the outer convex ring is adapted to the inner diameter of the sampling tube, and the inner diameter of the inner convex ring is adapted to the outer diameter of the sampling cup. This flour sampling device has a simple structure and is easy to operate, allowing operators to easily and quickly complete flour sampling independently.

[0003] Existing technologies for sampling flour are limited by the capacity of the sampling tool, resulting in a limited amount of flour that can be extracted each time. This makes it difficult to uniformly test product batches. Furthermore, existing sampling tools require the flour to be poured out after extraction, increasing the workload of flour sampling. The extracted flour often contains impurities, which can affect subsequent flour testing. Summary of the Invention

[0004] The purpose of this invention is to provide a flour sampling device.

[0005] The technical problem solved by this invention is: it is difficult to uniformly detect batches of flour products, flour extraction is labor-intensive, and the extracted flour contains impurities that affect subsequent flour testing.

[0006] This invention can be achieved through the following technical solution: a flour sampling device, including a conveying pipe, a first sleeve slidably disposed on the side wall of the conveying pipe, a plurality of feed holes evenly opened near the top of the first sleeve, a drive mechanism symmetrically disposed on both sides of the bottom of the first sleeve to drive the first sleeve to move up and down, a feeding component disposed at the bottom of the first sleeve to rotate relative to the first sleeve as it moves up and down, a plurality of interleaved stirring rods disposed inside the feeding component, a double-layer sampling mechanism disposed at the bottom of the feeding component, the first sleeve sampling flour in the conveying pipe through the feed holes, the up and down movement of the first sleeve driving the feeding component to rotate, thereby causing the feeding component to drive the plurality of stirring rods to stir the extracted flour, thereby breaking up the flour clumps and preventing them from blocking the conveying of flour to the device.

[0007] A further technical improvement of the present invention is that: a positioning groove is provided on the inner side wall of the conveying pipe near the first sleeve, a plurality of limiting rods are fixedly provided in the positioning groove, and a covering component is provided above the positioning groove. The positioning groove and the limiting rods are used to limit the covering component so that the covering component is not blown open by the flour when it is limited, thereby preventing the flour from leaking out of the conveying pipe.

[0008] Furthermore, the covering assembly includes a covering cap disposed above the positioning groove. The top of the covering cap is shaped like a cone, and the bottom of the covering cap has several limiting holes adapted to several limiting rods. A sliding rod is fixedly disposed on the top wall of the inner cavity of the covering cap, and a threaded plate is slidably disposed on the sliding rod. The top of the first sleeve has a first threaded groove adapted to the threaded plate. The cone-shaped top of the covering cap helps the sampling device box move into the delivery pipe. The connection between the threaded plate and the first threaded groove allows the first sleeve and the covering cap to slide together.

[0009] Furthermore, the feeding assembly also includes a second sleeve fitted inside the first sleeve. The two ends of several stirring rods are fixedly connected to the inner wall of the second sleeve. Several balls are rotatably connected to the bottom of the inner wall of the first sleeve along a threaded trajectory. The outer peripheral wall of the second sleeve has a second threaded groove that matches the threaded trajectory formed by the balls. A third sleeve is fitted over the first sleeve. The bottom of the second sleeve is rotatably connected to the bottom of the third sleeve. When the first sleeve moves up and down, it drives the balls to roll in the second threaded groove on the outer peripheral wall of the second sleeve, thereby driving the second sleeve to rotate. This causes the rotating second sleeve to drive the stirring rods to break up the flour clumps.

[0010] Furthermore, the dual-layer sampling mechanism includes an upper sampling component, with a lower sampling component rotatably disposed at the bottom of the upper sampling component. The upper sampling component is used to sample untreated flour, and the lower sampling component is used to sample flour from which impurities have been removed.

[0011] Furthermore, the upper sampling component includes a transparent tube installed at the bottom of the feeding component. A first sampling tube is fixedly connected to one side of the outer peripheral wall of the transparent tube. A support frame is fixedly installed at the bottom of the first sampling tube. Operators can use tools to remove untreated flour from this point or conduct preliminary observations of the flour by observing the transparent tube.

[0012] Furthermore, the lower sampling assembly includes a sieving box that is rotatably connected to the top and bottom of the transparent tube. The inner wall of the sieving box is fixedly provided with a sieving screen plate that is inclined to the horizontal plane. A slag outlet is opened on the side of the sieving box near the bottom of the sieving screen plate. The flour is sieved by the sieving screen plate, thereby sieving out impurities from the flour, so that the flour discharged from the lower sampling assembly can be directly put into subsequent testing.

[0013] Furthermore, the drive mechanism includes a support frame installed at the bottom of the transparent tube, an electric telescopic rod installed at the top of the support frame, a lifting rod fixedly installed at the top of the electric telescopic rod, the bottom end of the lifting rod penetrating through the top of the support frame, an installation hole opened at the top of the lifting rod, and a fixing component installed on one side of the bottom of the first sleeve. The fixing component is used to maintain or release the connection between the top of the lifting rod and the first sleeve. The lifting rod is fixedly connected to the first sleeve through the fixing component, so that the lifting rod can push and pull the first sleeve, and the first sleeve can move up and down continuously.

[0014] Furthermore, the fixing component includes a support rod fixedly connected to the outer peripheral wall of the first sleeve. The support rod passes through the slide groove and is slidably connected to the slide groove. A fixing rod is slidably provided at the end of the support rod away from the first sleeve. The end of the fixing rod is threadedly connected to the end of the support rod. The fixing rod passes through the mounting hole at the top of the lifting rod and is fixed in the fixing groove, thereby fixing the lifting rod to the bottom of one side of the first sleeve. Conversely, it can release the fixing relationship between the first sleeve and the lifting rod.

[0015] Furthermore, the drive assembly also includes a rack on one side of the bottom of the lifting rod, a rotating rod rotatably connected between the inner walls of both sides of the support frame, a gear meshing with the rack fixedly installed on the outer peripheral wall of the rotating rod near the rack, one end of the rotating rod passing through one side of the support frame and fixedly installed with a first connecting rod, a second connecting rod rotatably connected to the end of the first connecting rod away from the rotating rod, a connecting rod hinged to the end of the second connecting rod away from the first connecting rod, and a connecting rod rotatably connected to the bottom of one side of the screening box at the end of the connecting rod away from the second connecting rod. The rack moves up or down as the lifting plate rises and falls, driving the gear to rotate during the movement of the rack, thereby causing the gear to drive the rotating rod to rotate. The first connecting rod at one end of the rotating rod rotates with it, thereby driving the second connecting rod to transmit power to the screening box, thus causing the screening box to reciprocate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the cooperation of the lifting rod, transmission assembly, first sleeve, and cover cap, when the lifting rod drives the first sleeve to move upward, the first sleeve and cover cap cooperate to cover the feed hole. When the lifting rod drives the first sleeve to move downward, the feed hole is exposed from the cover cap and, together with the downward movement of the first sleeve, conveys flour of different layers into the first sleeve. At the same time, the rack and pinion at the bottom of the lifting rod, in conjunction with the gear, drives the transmission assembly to drive the rotating assembly, thereby causing the rotating assembly to rotate back and forth, thus sieving the flour conveyed into the rotating assembly, and finally making the extracted flour convenient for subsequent testing.

[0017] 2. Through the arrangement of the first sleeve, several ball bearings, the second sleeve, the second threaded groove, and the stirring rod, when the first sleeve moves upward or downward, several ball bearings at the bottom of the inner wall of the first sleeve slide in the second threaded groove on the outer peripheral wall of the second sleeve, thereby causing the second sleeve to drive the stirring rod to rotate in the third sleeve. This causes the flour clumps conveyed from the first sleeve into the second sleeve to be broken up by the stirring rod, preventing the flour clumps from clogging the extraction device and thus improving the efficiency of flour extraction. Attached Figure Description

[0018] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the structure of the present invention; Figure 3 For the present invention Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is a schematic diagram showing the separation of the slide bar and the first threaded plate of the present invention; Figure 5 This is a schematic diagram showing the disassembled first sleeve, second sleeve, and third sleeve of the present invention; Figure 6 This is a schematic diagram showing the connection between the support frame and the lifting rod of the present invention; Figure 7 This is a schematic diagram showing the connection between the rotating component and the transmission component of the present invention.

[0020] In the diagram: 1. Conveying pipe; 2. Positioning groove; 3. Limiting rod; 4. Cover cap; 5. Sliding rod; 6. Threaded plate; 7. First sleeve; 8. First threaded groove; 9. Feed hole; 10. Ball bearing; 11. Fixing assembly; 1101. Support rod; 1102. Fixing rod; 12. Second sleeve; 13. Second threaded groove; 14. Stirring rod; 15. Third sleeve; 16. Slide chute; 17. Transparent tube; 18. First sampling tube; 19. Support frame; 20. Electric telescopic rod; 21. Lifting rod; 22. Rack; 23. Rotating assembly; 2301. Screening box; 2302. Screening screen; 2303. Slag outlet; 24. Transmission assembly; 2401. Rotating rod; 2402. Gear; 2403. First connecting rod; 2404. Second connecting rod; 2405. Connecting rod; 25. Flange. Detailed Implementation

[0021] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0022] Please see Figure 1-7 As shown, this embodiment provides a flour sampling device, including a conveying pipe 1. A positioning groove 2 is provided at the bottom of the inner side of the conveying pipe 1. Several limiting rods 3 are fixedly provided in the positioning groove 2. A cover cap 4 is provided above the positioning groove 2. The bottom of the cover cap is adapted to the positioning groove 2. The top of the cover cap 4 is cone-shaped. Several limiting holes adapted to the several limiting rods 3 are provided at the bottom of the cover cap 4. A sliding rod 5 is fixedly provided on the top wall of the inner cavity of the cover cap 4. A threaded plate 6 is slidably provided on the outer peripheral wall of the sliding rod 5. A first sleeve 7 is sleeved inside the cover cap 4. A first threaded groove 8 adapted to the threaded plate 6 is provided at the top of the first sleeve 7. Several feed holes 9 are evenly provided on the outer peripheral wall of the first sleeve 7 near the top. The bottom end of the first sleeve 7 penetrates the bottom wall of the conveying pipe 1 and extends to the outside of the conveying pipe 1. Several balls 10 are evenly connected to the bottom inner wall of the first sleeve 7 along a spiral trajectory. Fixing components 11 are installed on both sides of the bottom of the outer peripheral wall of the first sleeve 7. A second sleeve 12 is sleeved inside the first sleeve 7. The top of the first sleeve 7 is inserted into the cover cap 4, and then the top of the first sleeve 7 is slowly pressed against the bottom of the inner wall of the cover cap 4. During this process, the bottom of the slide rod 5 passes through the top of the first sleeve 7 through the first threaded groove 8, and the threaded plate 6 on the slide rod 5 is pressed against the bottom of the inner wall of the cover cap 4 as the top of the first sleeve 7 is pushed. At this time, the first threaded groove 8 on the top of the first sleeve 7 is just aligned with the threaded plate 6. Then the first sleeve 7 is rotated, so that the threaded plate 6 and the first threaded groove 8 are threadedly connected as one. Since the threaded plate 6 and the slide rod 5 are slidably connected, the top of the first sleeve 7 is slidably connected to the cover cap 4 through the slide rod 5. Conversely, the threaded plate 6 is rotated out of the first threaded groove 8, thereby achieving the purpose of disconnecting the connection between the first sleeve 7 and the cover cap 4. The outer peripheral wall of the second sleeve 12 is provided with a second thread groove 13 that matches the threaded trajectory formed by multiple balls 10. Several stirring rods 14 are fixedly connected to the inner wall of the second sleeve 12. A third sleeve 15 is also sleeved on the outer peripheral wall of the second sleeve 12. The bottom of the outer peripheral wall of the second sleeve 12 is rotatably connected to the bottom inner wall of the third sleeve 15. Sliding grooves 16 are provided on both sides of the outer peripheral wall of the third sleeve 15. When the first sleeve 7 moves up and down inside the second sleeve 12, the cooperation between the inner wall of the first sleeve 7 and the second threaded groove 13 on the outer peripheral wall of the second sleeve 12 causes the second sleeve 12 to drive the inner wall of the second sleeve 12 to rotate, thereby stirring the flour clumps extracted into the second sleeve 12, thereby crushing the flour clumps and preventing the flour clumps from clogging in the extraction device. The fixing component 11 includes a support rod 1101 fixedly connected to the first sleeve 7. The support rod 1101 passes through the slide groove 16 and is slidably connected to the slide groove 16. A fixing rod 1102 is slidably connected to the end of the support rod 1101 away from the first sleeve 7. A fixing groove for fixing the end of the fixing rod 1102 is opened on the side of the support rod 1101 near the fixing rod 1102. The bottom of the third sleeve 15 is equipped with a transparent tube 17. One side of the outer peripheral wall of the transparent tube 17 is fixedly connected to the first sampling tube 18. A support frame 19 is fixedly installed at the bottom of the transparent tube 17. Electric telescopic rods 20 are fixedly installed on both sides of the top of the support frame 19. Lifting rods 21 are fixedly installed on the top of each of the two electric telescopic rods 20. The top of the lifting rods 21 is provided with mounting holes that are compatible with the fixed rods 1102. The bottom of the lifting rods 21 passes through the top of the support frame 19. A rack 22 is provided on one side of the bottom of the lifting rods 21. A rotating component 23 is installed at the bottom of the support frame 19. A transmission component 24 is installed between the rotating component 23 and the support frame 19. The top of the lifting rod 21 is passed through one end of the support rod 1101, and then the fixing rod 1102 is passed through the mounting hole at the top of the lifting rod 21 and inserted into the fixing groove in the support rod 1101 for fixing, thereby realizing the fixed connection between the lifting rod 21 and the first sleeve. Otherwise, the connection between the lifting rod 21 and the first sleeve 7 is released. The rotating assembly 23 includes a screening box 2301 whose top is rotatably connected to the transparent tube 17. A screening screen plate 2302 inclined to the horizontal plane is fixedly connected to the bottom of the inner cavity of the screening box 2301. The inclination angle between the screening screen plate 2302 and the horizontal plane is set between ten and thirty degrees. A slag outlet 2303 is opened on one side of the screening box 2301 near the bottom of the screening screen plate 2302. A second sampling tube is fixedly connected to the bottom of the screening box 2301. The transmission assembly 24 includes a rotating rod 2401 rotatably connected to both sides of the support frame 19. A gear 2402 that meshes with a rack 22 is fixedly installed on the rotating rod 2401 near the lifting rod 21. One end of the rotating rod 2401 passes through one side of the support frame 19 and is fixedly provided with a first connecting rod 2403. A second connecting rod 2404 is rotatably connected to the end of the first connecting rod 2403 away from the rotating rod 2401. A connecting rod 2405 is hinged to the end of the second connecting rod 2404 away from the first connecting rod 2403. The end of the connecting rod 2405 away from the second connecting rod 2404 is rotatably connected to the bottom of one side of the screening box 2301. When the lifting rod 21 moves up or down, the rack 22 on one side of its bottom drives the gear 2402 to rotate. The rotating gear 2402 drives the rotating rod 2401 and the first connecting rod 2403 at one end of the rotating rod 2401 to rotate. The rotating first connecting rod 2403 pushes and pulls the connecting rod 2405 through the second connecting rod 2404 slidably connected at one end, thereby causing the connecting rod 2405 to drive the screening box 2301 to rotate back and forth. The reciprocating rotation of the screening box 2301 causes the flour falling onto the screening screen plate 2302 to be screened by the screening screen plate 2302. The impurities inside the screened flour are screened to the top of the screening screen plate 2302 and roll along the inclined surface of the screening screen plate 2302 to the slag outlet 2303 during screening, and then roll out of the screening box 2301 from the slag outlet 2303. The top and bottom of the third sleeve 15 are connected to the bottom of the conveying pipe 1 and the top of the transparent pipe 17 respectively via flanges 25.

[0023] When using this invention, firstly, the top of the first sleeve 7 is connected to the cover cap 4, and the top of the third sleeve 15 is connected to the bottom of the conveying pipe 1 through the flange 25. Then, the bottom of the third sleeve 15 is connected to the top of the transparent pipe 17 through the flange 25. Then, the lifting rod 21 is connected to the first sleeve through the fixing assembly 11. After the above operations are completed, the extraction device can extract the flour in the conveying pipe 1. When extracting flour from the conveying pipe 1, the electric telescopic rod 20 first moves the lifting rod 21 upward, causing the lifting rod 21 to push the first sleeve 7 and the cover cap 4 towards the top of the conveying pipe 1. At this time, the cover cap 4, under the influence of gravity and the pressure of the flour, covers several feed holes 9 at the top of the first sleeve 7, preventing flour from entering the first sleeve 7 through the feed holes 9. Then, the electric telescopic rod 20 moves the lifting rod 21 downward. At this time, the flour in the conveying pipe 1 exerts an upward pushing force on the bottom plate of the cover cap 4, thereby removing the cover cap 4 from the top of the first sleeve 7, exposing the feed holes 9 to the flour in the conveying pipe 1. As the first sleeve 7 moves downward, the uncovered feed holes 9 transport the passing flour into the first sleeve 7, allowing the first sleeve 7 to pass through the feed holes. 9. Flour of different layers is extracted into the internal structure. At the same time, the second sleeve 12 rotates in the third sleeve 15 with the cooperation of several balls 10 and the second threaded groove 13. The sieving box 2301 rotates back and forth through the cooperation of the lifting rod 21 and the transmission component 24. The flour extracted from the conveying pipe 1 is stirred by the stirring rod 14 in the second sleeve 12 and enters the transparent tube 17. The state of the flour can be initially observed at the transparent tube 17. The flour can be initially sampled through the first sampling tube 18 on one side of the transparent tube 17. Then the flour enters the sieving box 2301 through the transparent tube 17 and is sieved by the sieve. The sieved flour is discharged through the second sampling tube, and the sieved impurities are discharged through the slag outlet 2303. The sampling frequency of the device can be controlled by controlling the extension and retraction frequency of the electric telescopic rod 20. When the extraction device needs to be cleaned, the connection between the fixing component 11 and the lifting rod 21, the connection between the top of the third sleeve 15 and the bottom of the conveying pipe 1, the connection between the first sleeve 7 and the cover cap 4, and the connection between the bottom of the third sleeve 15 and the top of the transparent pipe 17 can be disconnected in sequence, and then the inside of the device can be cleaned.

[0024] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A flour sampling device, comprising a conveying pipe (1), characterized in that: The side wall of the conveying pipe (1) is sealed and slidably provided with a first sleeve (7). Several feed holes (9) are evenly opened on the first sleeve (7) near the top. The bottom sides of the first sleeve (7) are symmetrically provided with driving mechanisms to drive the first sleeve (7) to move up and down. The bottom of the first sleeve (7) is provided with a feeding component that rotates relative to the first sleeve (7) as it moves up and down. The feeding component is provided with several interleaved stirring rods (14). The bottom of the feeding component is provided with a double-layer sampling mechanism. A positioning groove (2) is provided on the inner side wall of the conveying pipe (1) near the first sleeve (7). Several limiting rods (3) are fixed in the positioning groove (2). A covering component is provided above the positioning groove (2). The covering assembly includes a covering cap (4) disposed above the positioning groove (2). The top of the covering cap (4) is shaped as a cone. The bottom of the covering cap (4) is provided with several limiting holes that are adapted to several limiting rods (3). A sliding rod (5) is fixedly provided on the top wall of the inner cavity of the covering cap (4). A threaded plate (6) is slidably provided on the sliding rod (5). The top of the first sleeve (7) is provided with a first threaded groove (8) that is adapted to the threaded plate (6). When the first sleeve (7) moves upward, the first sleeve (7) cooperates with the cover cap (4) to cover the feed hole (9); when the first sleeve (7) moves downward, the feed hole (9) is exposed from the cover cap (4) and cooperates with the downward movement of the first sleeve (7) to transport flour of different layers into the first sleeve (7).

2. The flour sampling device according to claim 1, characterized in that, The feeding assembly also includes a second sleeve (12) sleeved inside the first sleeve (7), with the two ends of a plurality of stirring rods (14) fixedly connected to the inner wall of the second sleeve (12), a plurality of balls (10) rotatably connected to the bottom of the inner wall of the first sleeve (7) along a threaded trajectory, and a second threaded groove (13) adapted to the threaded trajectory formed by the plurality of balls (10) on the outer peripheral wall of the second sleeve (12), and a third sleeve (15) sleeved on the first sleeve (7), with the bottom of the second sleeve (12) rotatably connected to the bottom of the third sleeve (15).

3. The flour sampling device according to claim 1, characterized in that, The dual-layer sampling mechanism includes an upper sampling component, and a lower sampling component is rotatably disposed at the bottom of the upper sampling component.

4. A flour sampling device according to claim 3, characterized in that, The upper sampling component includes a transparent tube (17) installed at the bottom of the feeding component, and a first sampling tube (18) is fixedly connected to one side of the outer peripheral wall of the transparent tube (17).

5. A flour sampling device according to claim 3, characterized in that, The lower sampling assembly includes a screening box (2301) whose top is rotatably connected to the bottom of the transparent tube (17). The inner wall of the screening box (2301) is fixedly provided with a screening screen plate (2302) inclined to the horizontal plane. The screening box (2301) has a slag outlet (2303) on one side near the bottom of the screening screen plate (2302).

6. A flour sampling device according to claim 4, characterized in that, The drive mechanism includes a support frame (19) installed at the bottom of the transparent tube (17), an electric telescopic rod (20) installed at the top of the support frame (19), a lifting rod (21) fixedly installed at the top of the electric telescopic rod (20), the bottom end of the lifting rod (21) penetrating the top of the support frame (19), and a fixing component (11) installed on one side of the bottom of the first sleeve (7). The fixing component (11) is used to maintain or release the connection between the top of the lifting rod (21) and the first sleeve (7).

7. A flour sampling device according to claim 6, characterized in that, The fixing component (11) includes a support rod (1101) fixedly connected to the outer peripheral wall of the first sleeve (7). A fixing rod (1102) is slidably disposed at one end of the support rod (1101) away from the first sleeve (7). The end of the fixing rod (1102) is threadedly connected to the end of the support rod (1101).

8. A flour sampling device according to claim 6, characterized in that, The driving mechanism also includes a rack (22) on one side of the bottom of the lifting rod (21). A rotating rod (2401) is rotatably connected between the inner walls of both sides of the support frame (19). A gear (2402) that meshes with the rack (22) is fixedly installed on the outer peripheral wall of the rotating rod (2401) near the position of the rack (22). One end of the rotating rod (2401) passes through one side of the support frame (19) and is fixedly installed with a first connecting rod (2403). The end of the first connecting rod (2403) away from the rotating rod (2401) is rotatably connected with a second connecting rod (2404). The end of the second connecting rod (2404) away from the first connecting rod (2403) is hinged with a connecting rod (2405). The end of the connecting rod (2405) away from the second connecting rod (2404) is rotatably connected to the bottom of one side of the screening box (2301).

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