A multi-stage crushing device and method for samples used in chemical analysis and testing in food laboratories

Abstract

The present invention belongs to the technical field of food detection, and discloses a multi-stage crushing device and method for samples used in chemical analysis tests in food laboratories. The device comprises a collecting component, a plurality of screening components are installed on the top of the collecting component, a plurality of connecting components are installed on the inner wall of the screening component, a driving component is installed on the top of the screening component located above, the collecting component comprises a mounting seat, a collecting barrel is fixedly connected to the top of the mounting seat, a material taking port is provided on the outer wall of the collecting barrel, a supporting column is fixedly connected to the top of the mounting seat, the screening component comprises a mounting frame, a connecting pipe is fixedly connected to the top of the mounting frame, and in the present invention, a single motor can simultaneously drive the first connecting shaft and the second connecting shaft on a plurality of connecting components to rotate simultaneously, thereby reducing the number of required driving motors and facilitating operators to quickly disassemble the filter screen.

Description

Technical Field

[0001] The present invention relates to the field of food testing, and more specifically to a multi-stage crushing device and method for samples used in chemical analysis tests in food laboratories. Background Art

[0002] During food production and processing, chemical analysis tests are conducted in the laboratory to determine the nutritional components of food, such as protein, carbohydrates, fat, vitamins and minerals, to provide a scientific basis for food nutritional evaluation and quality control. Chemical analysis tests also help to research and develop food storage and preservation technologies, extending the shelf life of food by inhibiting microbial growth, slowing down food oxidation and maintaining a suitable moisture state.

[0003] In food laboratories, for the convenience of food analysis and testing, food samples often need to be crushed, especially large materials, which need to go through multi-stage crushing. However, in the current design of many multi-stage food crushing devices, it is common to set filter screens under multiple groups of crushing knives to grade and screen the crushed food. Due to the layered installation of the filter screens, each group of crushing knives needs to be driven by an independent motor, and it is impossible to achieve simultaneous control of multiple groups of crushing knives by a single motor, which increases the overall cost of the equipment. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a multi-stage crushing device and method for samples used in food laboratory chemical analysis tests, which can simultaneously drive the first connecting shaft and the second connecting shaft on multiple connecting components to rotate simultaneously through a single motor, thereby reducing the number of required driving motors.

[0005] The present invention proposes a multi-stage sample crushing device for chemical analysis testing in food laboratories, comprising a collecting component, a plurality of screening components are installed on the top of the collecting component, a plurality of connecting components are installed on the inner wall of the screening component, and a driving component is installed on the top of the screening component located above.

[0006] Furthermore, the collecting assembly comprises a mounting seat, a collecting barrel is fixedly connected to the top of the mounting seat, a material taking port is provided on the outer wall of the collecting barrel, and a supporting column is fixedly connected to the top of the mounting seat.

[0007] Furthermore, the screening component includes a mounting frame, a connecting pipe is fixedly connected to the top of the mounting frame, a discharge hole is opened on the top of the mounting frame, the discharge hole is located directly below the connecting pipe, a discharge hopper is fixedly connected to the outer wall of the connecting pipe located above, the top of the connecting pipe on the screening component located below is fixedly connected to the mounting frame on the screening component located above it, the bottom of the mounting frame on the screening component located at the bottom is fixedly connected to the collecting cylinder, and the bottom of the mounting frame on the screening component located at the bottom is fixedly connected to the supporting column.

[0008] Furthermore, a disassembly hole is provided on the top of the installation frame, a pull rod is threadedly connected to the inner wall of the installation frame, an end of the pull rod passes through the installation frame and extends to the outside thereof, and the end of the pull rod is rotatably connected to a mounting plate;

[0009] The top of the mounting plate is provided with a mounting hole, the inner wall of the mounting hole is sleeved with a filter screen, the top of the filter screen is provided with a through hole, the inner wall of the through hole is provided with a connecting hole, the inner wall of the connecting hole is fixedly connected with a protrusion, the end of the protrusion is an arc-shaped structure, the outer wall of the filter screen is fixedly connected with a limiting ring, and the outer wall of the limiting ring is provided with a plurality of slots;

[0010] The inner wall of the mounting hole is fixedly connected with a plurality of connecting sleeves, the inner wall of the connecting sleeve is provided with two limiting holes, the inner wall of the connecting sleeve is slidably connected with a first slide rod, the outer wall of the first slide rod is fixedly connected with two limiting blocks, the two limiting blocks are respectively slidably connected with the corresponding inner walls of the limiting holes, the outer end of the first slide rod is sleeved with a first spring, the outer ends of the first slide rod are fixedly connected with a clamping column, the clamping column is clamped in cooperation with the corresponding clamping groove, one end of the first spring is fixedly connected to the clamping column, and the other end of the first spring is fixedly connected to the connecting sleeve.

[0011] Further, the connecting assembly includes a first connecting shaft, a first support plate is rotatably connected to the outer wall of the first connecting shaft, two ends of the first support plate are respectively fixedly connected to the corresponding inner walls of the connecting tube, a first cross clamp is slidably connected to the inner wall of the first connecting shaft, the bottom of the first cross clamp extends below the first connecting shaft, two moving holes are provided on the inner wall of the first connecting shaft, the two inner walls of the moving holes are fixedly connected to the second sliding rods, the outer walls of the two second sliding rods are sleeved with a second spring, the outer wall of the first cross clamp is fixedly connected to two first sliding blocks, the two first sliding blocks are respectively slidably connected to the corresponding inner walls of the moving holes, the ends of the two second sliding bars respectively pass through the first sliding block and are slidably connected thereto, one end of the second spring is fixedly connected to the first sliding block, and the other end of the second spring is fixedly connected to the inner wall of the first connecting shaft.

[0012] Furthermore, a sliding groove is provided at the bottom of the first connecting shaft, the outer wall of the first cross clamp is fixedly connected to the second connecting shaft, the end of the second connecting shaft is slidably connected to the inner wall of the sliding groove, the outer wall of the second connecting shaft is fixedly connected to the first rubber ring, the outer wall of the second connecting shaft is sleeved with a rotatable second support plate, the inner wall of the second support plate is fixedly connected to the second rubber ring, the end of the second support plate is fixedly connected to the inner wall of the connecting pipe, the outer wall of the second connecting shaft is fixedly connected to a crushing knife, and the distance between the crushing knife and the filter screen on the multiple connecting components decreases from top to bottom.

[0013] Further, the outer wall of the second connecting shaft is provided with two grooves, the inner walls of the two grooves are provided with two movable grooves, the inner walls of the movable grooves are fixedly connected with a fourth slide bar, the circumferential outer walls of the fourth slide bar are sleeved with a fourth spring, the inner walls of the movable grooves are slidably connected with a second slider, the ends of the fourth slide bar pass through the second slider and are slidably connected thereto, the inner walls of the grooves are slidably connected with a convex plate, the two ends of the convex plate are respectively fixedly connected with the corresponding second slider, the outer wall of the convex plate is fixedly connected with a stopper, and the outer wall of the convex plate is provided with a guide groove;

[0014] One end of the fourth spring is fixedly connected to the second sliding block, and the other end of the fourth spring is fixedly connected to the inner wall of the second connecting shaft.

[0015] Furthermore, the bottom of the second connecting shaft is slidably connected to two push rods, the tops of the two push rods extend into the groove, the ends of the push rods are fixedly connected to push blocks, the ends of the push blocks extend into the guide groove, the tops of the push blocks are fixedly connected to connecting arms, the inner walls of the connecting arms are slidably connected to third slide rods, the circumferential outer walls of the third slide rods are sleeved with third springs, and the ends of the third slide rods are fixedly connected to the inner walls of the second connecting shaft respectively;

[0016] One end of the third spring is fixedly connected to the inner wall of the second connecting shaft, and the other end of the third spring is fixedly connected to the connecting arm.

[0017] Further, the driving assembly includes a third support plate, the bottom of the third support plate is fixedly connected to the mounting frame located on the top screening assembly, the outer wall of the third support plate is fixedly connected to a support plate, the top of the support plate is fixedly connected to a fourth support plate, the outer wall of the fourth support plate is fixedly connected to a motor, the output end of the motor is fixedly connected to an output shaft, and the circumferential outer wall of the output shaft is fixedly connected to a gear;

[0018] The inner wall of the support plate is rotatably connected to an extension shaft, and a plurality of convex teeth are fixedly connected to the circumferential outer wall of the extension shaft, and the convex teeth are meshed with gears. An adjusting screw is threadedly connected to the top of the extension shaft, and a limiting groove is provided on the inner wall of the extension shaft. A driving shaft is sleeved on the inner wall of the extension shaft, and the top of the driving shaft is rotatably connected to the adjusting screw, and the driving shaft is slidably connected to the inner wall of the limiting groove. A second cross clamp is fixedly connected to the bottom of the driving shaft, and the end of the second cross clamp extends to the outside of the extension shaft.

[0019] A method for a multi-stage crushing device for samples used in chemical analysis tests in a food laboratory comprises the following steps:

[0020] S1. Put food into the connecting tube through the lower hopper, and rotate the adjusting screw to make the driving shaft slide along the limiting groove. The driving shaft drives the second cross card to move, and the second cross card squeezes the first cross card inside the top first connecting shaft, so that the first cross card slides downward along the inner wall of the first connecting shaft. When the first cross card slides, it drives the crushing knife and the first rubber ring to slide downward, so that the first rubber ring is out of contact with the second rubber ring, and the crushing knife drops to a position close to the filter screen. At this time, the first cross card in the upper first connecting shaft squeezes the first cross card in the lower first connecting shaft respectively, until the bottom of the second connecting shaft on the upper connecting assembly contacts the top of the first connecting shaft on the lower connecting assembly, so that multiple connecting assemblies can be connected to each other. When the first cross card slides, it drives the first slider to slide along the second slide rod and compresses the second spring.

[0021] S2. The motor drives the gear to rotate through the output shaft, the gear drives the extension shaft to rotate through the convex teeth, the extension shaft drives the internal drive shaft to rotate, the drive shaft drives the second cross clamp to rotate, the second cross clamp drives the first and second connecting shafts on the multiple connecting components to rotate synchronously, and the second connecting shaft drives the crushing knife to rotate, so that the food can be crushed. Since the distance between the crushing knives and the filter screen on the multiple connecting components decreases from top to bottom, the food can be processed step by step and finely.

[0022] S3, when the second connecting shaft slides downward, its end will be inserted into the through hole on the lower filter screen, and when the bottom of the second connecting shaft on the upper connecting assembly contacts the top of the first connecting shaft on the lower connecting assembly, at this time, the top of the first connecting shaft on the lower connecting assembly squeezes the push rod at the bottom of the second connecting shaft above it, and the push rod drives the connecting arm to slide along the third sliding rod and squeezes the third spring, and at the same time, the push rod pushes the push block to move, and the push block squeezes the convex plate, and the convex plate drives the second sliding block to slide along the fourth sliding rod and squeezes the fourth spring, until the convex plate pushes the stopper to extend from the inside of the second connecting shaft;

[0023] S4, when the second connecting shaft rotates, the stopper drives the stopper to rotate, and when the stopper drives the convex block inside the filter screen, when the convex block is squeezed, the filter screen is driven to move, and the filter screen drives the limit ring to move, and the limit ring squeezes the clamping column, and the clamping column pushes the first sliding rod to slide toward the inner wall of the connecting sleeve, and the first sliding rod drives the limit block to slide along the inner wall of the limit hole, and when the clamping column moves, it squeezes the first spring, so that the multiple filter screens can shake horizontally, so that the crushed food can be screened;

[0024] S5, placing the tray for taking out materials inside the collecting tube, and taking out the tray through the material taking port, so that the crushed food can be taken out for use;

[0025] S6. After processing, the second cross clamp is pulled out from the top first connecting shaft by rotating the adjusting screw in the reverse direction. Under the elastic force of the second spring, the first cross clamp is moved out from above the first connecting shaft. When the first cross clamp moves, it drives the second connecting shaft to move. The second connecting shaft drives the first rubber ring to move upward and abuts against the second rubber ring in the second support plate. Through the friction between the first rubber ring and the second rubber ring, the angle of the internal hole of the first connecting shaft can be fixed. When installing, the first cross clamp located in the upper first connecting shaft can be accurately inserted into the hole of the lower first connecting shaft. When two adjacent connecting components are disengaged from each other, under the elastic force of the third spring, the push block moves downward. Under the elastic force of the fourth spring, the stop block moves into the second connecting shaft, so that the second connecting shaft can be moved out from the lower filter screen.

[0026] S7. By rotating the pull rod, the installation plate is driven to slide along the inner wall of the installation frame through the pull rod, and the filter is moved to the bottom of the disassembly hole through the installation plate. By pulling the filter upward, the limit ring is separated from the clamping column, and the filter can be disassembled and cleaned.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. In the present invention, a single motor can simultaneously drive the first connecting shaft and the second connecting shaft on multiple connecting components to rotate simultaneously, thereby reducing the number of required driving motors and facilitating operators to quickly disassemble the filter.

[0029] 2. In the present invention, when the second connecting shaft rotates, it drives the stopper to rotate. When the stopper rotates, it squeezes the protrusion inside the filter. When the protrusion is squeezed, it drives the filter to move. The filter drives the limit ring to move. The limit ring squeezes the clamping column. The clamping column pushes the first slide bar to slide toward the inner wall of the connecting sleeve. The first slide bar drives the limit block to slide along the inner wall of the limit hole. When the clamping column moves, it squeezes the first spring, so that multiple filters can shake horizontally, so that the crushed food can be screened. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the overall structure of the collecting assembly of the present invention;

[0033] Figure 3 It is a schematic diagram of the overall structure of the screening component of the present invention;

[0034] Figure 4 It is a schematic diagram of the internal structure of the installation frame of the present invention;

[0035] Figure 5 It is a schematic diagram of the installation structure of the filter screen of the present invention;

[0036] Figure 6 For the present invention Figure 5 The enlarged view of point A in the middle;

[0037] Figure 7 For the present invention Figure 5 The enlarged view of point B in the middle;

[0038] Figure 8 It is a schematic diagram of the overall structure of the connection assembly of the present invention;

[0039] Fig. 9 It is a schematic diagram of the installation structure of the first cross clamp of the present invention;

[0040] Fig.10 It is a schematic diagram of the installation structure of the first sliding block of the present invention;

[0041] Fig.11 For the present invention Fig. 9 Schematic diagram of the local structure in;

[0042] Fig.12 It is a partial structural schematic diagram of the second connecting shaft of the present invention;

[0043] Fig.13 It is a schematic diagram of the installation structure of the stopper of the present invention;

[0044] Fig.14 It is a schematic diagram of the overall structure of the driving assembly of the present invention;

[0045] Fig.15It is a schematic diagram of the installation structure of the drive shaft of the present invention;

[0046] Fig.16 It is a schematic diagram of the local structure of the present invention.

[0047] Explanation of the reference numerals in the figure: 1. Collecting assembly; 101. Mounting seat; 102. Collecting cylinder; 103. Material taking port; 104. Support column; 2. Screening assembly; 201. Mounting frame; 202. Connecting pipe; 203. Discharging hopper; 204. Disassembly hole; 205. Pull rod; 206. Discharging hole; 207. Mounting plate; 208. Mounting hole; 209. Filter screen; 210. Through hole; 211. Connecting hole; 212. Bump; 213. Limiting ring; 214. Slot; 215. Connecting sleeve; 216. Limiting hole; 217. First slide bar; 218. First spring; 219. Limiting block; 220. Slot; 3. Connecting assembly; 301. First connecting shaft; 302. Slot; 303. Second connecting shaft; 304. Crushing knife; 305. First support plate; 306. Second support plate; 307 , first rubber ring; 308, second rubber ring; 309, first cross clamp; 310, movable hole; 311, second slide bar; 312, second spring; 313, first slider; 314, groove; 315, movable groove; 316, push rod; 317, push block; 318, connecting arm; 319, third slide bar; 320, third spring; 321, convex plate; 322, guide groove; 323, second slider; 324, fourth slide bar; 325, fourth spring; 326, stopper; 4, drive assembly; 401, third support plate; 402, support plate; 403, fourth support plate; 404, motor; 405, output shaft; 406, gear; 407, extension shaft; 408, convex tooth; 409, limit groove; 410, adjusting screw; 411, drive shaft; 412, second cross clamp. DETAILED DESCRIPTION

[0048] 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.

[0049] During food production and processing, chemical analysis tests are conducted in the laboratory to determine the nutritional components of food, such as protein, carbohydrates, fat, vitamins and minerals, to provide a scientific basis for food nutritional evaluation and quality control. Chemical analysis tests also help to research and develop food storage and preservation technologies, extending the shelf life of food by inhibiting microbial growth, slowing down food oxidation and maintaining a suitable moisture state;

[0050] Chemical analysis testing also plays a key role in the research and development of food additives to ensure the safety, compliance and enhancement of food color, aroma, taste and texture.

[0051] Chemical analysis tests can also detect heavy metals, pesticide residues, harmful microorganisms and other harmful substances in food, helping to ensure food safety and protect consumer health;

[0052] In chemical analysis tests, the particle size of the sample has a certain influence on the analysis results. In food laboratories, for the accuracy and convenience of food analysis tests, food samples often need to be crushed, especially large-volume materials, which need to undergo multi-stage crushing. In view of this, the present invention proposes a multi-stage crushing device and method for samples used in food laboratory chemical analysis tests.

[0053] Specifically: Embodiment 1:

[0054] like Figure 1 , Fig.16 and Figure 2 As shown, a multi-stage crushing device for samples used in chemical analysis tests in food laboratories includes a collecting component 1, and the collecting component 1 includes a mounting seat 101, a collecting cylinder 102 is fixedly connected to the top of the mounting seat 101, a material taking port 103 is opened on the outer wall of the collecting cylinder 102, and a supporting column 104 is fixedly connected to the top of the mounting seat 101. Embodiment 2:

[0055] This embodiment provides a multi-stage crushing device for samples used in chemical analysis and testing in food laboratories, which further includes the following structures based on the first embodiment:

[0056] like Figure 1 , Fig.16 and Figure 4-Figure 7 As shown, a plurality of screening components 2 are installed on the top of the collecting component 1, and the screening component 2 includes a mounting frame 201, a connecting pipe 202 is fixedly connected to the top of the mounting frame 201, a material discharge hole 206 is opened on the top of the mounting frame 201, and the material discharge hole 206 is located directly below the connecting pipe 202, and a material discharge hopper 203 is fixedly connected to the outer wall of the connecting pipe 202 located above, the top of the connecting pipe 202 located on the lower screening component 2 is fixedly connected to the mounting frame 201 located on the screening component 2 above it, the bottom of the mounting frame 201 located on the bottom screening component 2 is fixedly connected to the collecting cylinder 102, and the bottom of the mounting frame 201 located on the bottom screening component 2 is fixedly connected to the supporting column 104;

[0057] A disassembly hole 204 is provided at the top of the installation frame 201, and a tie rod 205 is threadedly connected to the inner wall of the installation frame 201. The end of the tie rod 205 passes through the installation frame 201 and extends to the outside thereof. The end of the tie rod 205 is rotatably connected to a mounting plate 207.

[0058] A mounting hole 208 is provided on the top of the mounting plate 207, and a filter screen 209 is sleeved on the inner wall of the mounting hole 208. The filter screen 209 will produce horizontal shaking when the crushing knife 304 rotates, which helps to better screen the crushed food and improve the screening effect. It can also prevent the filter screen 209 from being blocked and extend the service life of the filter screen 209.

[0059] A through hole 210 is formed on the top of the filter 209, a connecting hole 211 is formed on the inner wall of the through hole 210, a protrusion 212 is fixedly connected to the inner wall of the connecting hole 211, and the end of the protrusion 212 is an arc-shaped structure. A limiting ring 213 is fixedly connected to the outer wall of the filter 209, and a plurality of slots 214 are formed on the outer wall of the limiting ring 213;

[0060] A plurality of connecting sleeves 215 are fixedly connected to the inner wall of the mounting hole 208, two limiting holes 216 are provided on the inner wall of the connecting sleeve 215, a first slide rod 217 is slidably connected to the inner wall of the connecting sleeve 215, two limiting blocks 219 are fixedly connected to the outer wall of the first slide rod 217, the two limiting blocks 219 are respectively slidably connected to the corresponding inner walls of the limiting holes 216, a first spring 218 is sleeved on the outer end of the first slide rod 217, a clamping column 220 is fixedly connected to the outer end of the first slide rod 217, the clamping column 220 is clamped and matched with the corresponding clamping groove 214, one end of the first spring 218 is fixedly connected to the clamping column 220, and the other end of the first spring 218 is fixedly connected to the connecting sleeve 215. Embodiment three:

[0061] This embodiment provides a multi-stage crushing device for samples used in chemical analysis and testing in food laboratories, which further includes the following structures based on the second embodiment:

[0062] like Figure 1 , Fig.16 and Figure 8-Figure 13As shown, a plurality of connecting components 3 are installed on the inner wall of the screening component 2, and the connecting component 3 includes a first connecting shaft 301, and the outer wall of the first connecting shaft 301 is rotatably connected to the first support plate 305, and the two ends of the first support plate 305 are respectively fixedly connected to the corresponding inner walls of the connecting pipe 202, and the inner wall of the first connecting shaft 301 is slidably connected to the first cross clamping plate 309, and the bottom of the first cross clamping plate 309 extends below the first connecting shaft 301, and the inner wall of the first connecting shaft 301 is provided with two moving holes 310, and the inner walls of the two moving holes 310 are fixedly connected to the second sliding rods 311, and the outer walls of the two second sliding rods 311 are sleeved with second springs 312, and the outer wall of the first cross clamping plate 309 is fixedly connected to two first sliders 313, and the two first sliders 313 are respectively slidably connected to the corresponding inner walls of the moving holes 310, and the ends of the two second sliding rods 311 respectively penetrate the first slider 313 and are slidably connected thereto, and one end of the second spring 312 is fixedly connected to the first slider 313, and the other end of the second spring 312 is fixedly connected to the inner wall of the first connecting shaft 301;

[0063] Further, a slide groove 302 is provided at the bottom of the first connecting shaft 301, the outer wall of the first cross clamp 309 is fixedly connected to the second connecting shaft 303, the end of the second connecting shaft 303 is slidably connected to the inner wall of the slide groove 302, the outer wall of the second connecting shaft 303 is fixedly connected to the first rubber ring 307, the outer wall of the second connecting shaft 303 is sleeved with a rotatable second support plate 306, the inner wall of the second support plate 306 is fixedly connected to the second rubber ring 308, the end of the second support plate 306 is fixedly connected to the inner wall of the connecting pipe 202, the outer wall of the second connecting shaft 303 is fixedly connected to the crushing knife 304, and the distance between the crushing knife 304 and the filter screen 209 on the multiple connecting components 3 decreases from top to bottom;

[0064] The outer wall of the second connecting shaft 303 is provided with two grooves 314, and the inner walls of the two grooves 314 are provided with two movable grooves 315. The inner walls of the movable grooves 315 are fixedly connected with fourth slide bars 324, and the outer walls of the circumferences of the fourth slide bars 324 are sleeved with fourth springs 325. The inner walls of the movable grooves 315 are slidably connected with second sliders 323, and the ends of the fourth slide bars 324 penetrate the second sliders 323 and are slidably connected thereto. The inner walls of the grooves 314 are slidably connected with convex plates 321, and the two ends of the convex plates 321 are respectively fixedly connected with the corresponding second sliders 323, and the outer walls of the convex plates 321 are fixedly connected with stoppers 326, and the outer walls of the convex plates 321 are provided with guide grooves 322;

[0065] One end of the fourth spring 325 is fixedly connected to the second slider 323, and the other end of the fourth spring 325 is fixedly connected to the inner wall of the second connecting shaft 303;

[0066] Two push rods 316 are slidably connected to the bottom of the second connecting shaft 303, and the tops of the two push rods 316 extend into the groove 314. The ends of the push rods 316 are fixedly connected to push blocks 317, and the ends of the push blocks 317 extend into the guide groove 322. The tops of the push blocks 317 are fixedly connected to connecting arms 318, and the inner walls of the connecting arms 318 are slidably connected to third slide rods 319. The circumferential outer walls of the third slide rods 319 are sleeved with third springs 320, and the ends of the third slide rods 319 are fixedly connected to the inner walls of the second connecting shaft 303 respectively.

[0067] One end of the third spring 320 is fixedly connected to the inner wall of the second connecting shaft 303 , and the other end of the third spring 320 is fixedly connected to the connecting arm 318 . Embodiment 4:

[0068] This embodiment provides a multi-stage crushing device for samples used in chemical analysis and testing in food laboratories, which further includes the following structures based on the third embodiment:

[0069] like Figure 1 , Fig.16 and Figure 14-15 As shown, a driving assembly 4 is installed on the top of the screening assembly 2 located above, and the driving assembly 4 includes a third support plate 401, the bottom of the third support plate 401 is fixedly connected to the mounting frame 201 located on the top screening assembly 2, the outer wall of the third support plate 401 is fixedly connected to a support plate 402, the top of the support plate 402 is fixedly connected to a fourth support plate 403, the outer wall of the fourth support plate 403 is fixedly connected to a motor 404, the output end of the motor 404 is fixedly connected to an output shaft 405, and the circumferential outer wall of the output shaft 405 is fixedly connected to a gear 406;

[0070] An extension shaft 407 is rotatably connected to the inner wall of the support plate 402, and a plurality of convex teeth 408 are fixedly connected to the circumferential outer wall of the extension shaft 407, and the convex teeth 408 are meshed with the gear 406. An adjusting screw 410 is threadedly connected to the top of the extension shaft 407, and a limiting groove 409 is provided on the inner wall of the extension shaft 407. A driving shaft 411 is sleeved on the inner wall of the extension shaft 407, and the top of the driving shaft 411 is rotatably connected to the adjusting screw 410, and the driving shaft 411 is slidably connected to the inner wall of the limiting groove 409, and a second cross clamping plate 412 is fixedly connected to the bottom of the driving shaft 411, and the end of the second cross clamping plate 412 extends to the outside of the extension shaft 407.

[0071] Working principle: Food is put into the connecting tube 202 through the lower hopper 203, and the drive shaft 411 is made to slide along the limit groove 409 by rotating the adjusting screw 410. The drive shaft 411 drives the second cross clamping plate 412 to move, and the first cross clamping plate 309 inside the top first connecting shaft 301 is squeezed by the second cross clamping plate 412, so that the first cross clamping plate 309 slides downward along the inner wall of the first connecting shaft 301. When the first cross clamping plate 309 slides, it drives the crushing knife 304 and the first rubber ring 307 to slide downward, so that the first rubber ring 307 is separated from the second rubber ring 307. The first cross clamp 309 in the upper first connecting shaft 301 squeezes the first cross clamp 309 in the lower first connecting shaft 301 until the bottom of the second connecting shaft 303 on the upper connecting assembly 3 contacts the top of the first connecting shaft 301 on the lower connecting assembly 3, thereby connecting multiple connecting assemblies 3 to each other. When the first cross clamp 309 slides, it drives the first slider 313 to slide along the second slider 311 and compresses the second spring 312.

[0072] The motor 404 drives the gear 406 to rotate through the output shaft 405, and the gear 406 drives the extension shaft 407 to rotate through the convex teeth 408, and the extension shaft 407 drives the internal driving shaft 411 to rotate, and the second cross clamping plate 412 is driven to rotate through the driving shaft 411, and the second cross clamping plate 412 drives the first connecting shaft 301 and the second connecting shaft 303 on the multiple connecting components 3 to rotate synchronously, and drives the crushing knife 304 to rotate through the second connecting shaft 303, so that the food can be crushed and processed. Since the distance between the crushing knife 304 on the multiple connecting components 3 and the filter 209 decreases from top to bottom, the food can be finely processed in sequence;

[0073] When the second connecting shaft 303 slides downward, its end portion will be inserted into the through hole 210 on the lower filter screen 209. When the bottom of the second connecting shaft 303 on the upper connecting assembly 3 contacts the top of the first connecting shaft 301 on the lower connecting assembly 3, the top of the first connecting shaft 301 on the lower connecting assembly 3 squeezes the push rod 316 on the bottom of the second connecting shaft 303 above it. The push rod 316 drives the connecting arm 318 to slide along the third sliding rod 319 and squeezes the third spring 320. At the same time, the push rod 316 pushes the push block 317 to move, and the push block 317 squeezes the convex plate 321. The convex plate 321 drives the second sliding block 323 to slide along the fourth sliding rod 324 and squeezes the fourth spring 325 until the convex plate 321 pushes the stopper 326 to extend from the inside of the second connecting shaft 303.

[0074] When the second connecting shaft 303 rotates, the stopper 326 is driven to rotate. When the stopper 326 rotates, the protrusion 212 inside the filter 209 is squeezed. When the protrusion 212 is squeezed, the filter 209 is driven to move. The filter 209 drives the limiting ring 213 to move. The limiting ring 213 squeezes the clamping column 220. The clamping column 220 pushes the first sliding rod 217 to slide toward the inner wall of the connecting sleeve 215. The first sliding rod 217 drives the limiting block 219 to slide along the inner wall of the limiting hole 216. When the clamping column 220 moves, it squeezes the first spring 218, so that the multiple filters 209 can be shaken horizontally, so that the crushed food can be screened;

[0075] The tray for taking out materials is placed inside the collecting tube 102, and the tray is taken out through the material taking port 103, so that the crushed food can be taken out for use;

[0076] After processing, the second cross clamping plate 412 is pulled out from the top of the first connecting shaft 301 by rotating the adjusting screw 410 in the opposite direction. Under the elastic force of the second spring 312, the first cross clamping plate 309 is moved out from above the first connecting shaft 301. When the first cross clamping plate 309 moves, it drives the second connecting shaft 303 to move. The second connecting shaft 303 drives the first rubber ring 307 to move upward and abuts against the second rubber ring 308 in the second support plate 306. The friction between them can fix the angle of the inner hole of the first connecting shaft 301, so that during installation, the first cross clamping plate 309 located in the upper first connecting shaft 301 can be accurately inserted into the hole of the lower first connecting shaft 301. When two adjacent connecting components 3 are separated from each other, the push block 317 moves downward under the elastic force of the third spring 320, and the stopper 326 moves into the second connecting shaft 303 under the elastic force of the fourth spring 325, so that the second connecting shaft 303 can be moved out from the lower filter screen 209.

[0077] By rotating the pull rod 205, the installation plate 207 is driven to slide along the inner wall of the installation frame 201, and the filter screen 209 is moved to the bottom of the disassembly hole 204 through the installation plate 207. By pulling the filter screen 209 upward, the limit ring 213 is detached from the clamping column 220, and the filter screen 209 can be disassembled and cleaned.

[0078] It should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0079] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage crushing device for samples used in food laboratory chemical analysis and testing, comprising a collecting assembly (1), characterized in that: A plurality of screening components (2) are installed on the top of the collecting component (1), a plurality of connecting components (3) are installed on the inner wall of the screening component (2), and a driving component (4) is installed on the top of the screening component (2) located above; The screening component (2) comprises a mounting frame (201), a disassembly hole (204) is provided at the top of the mounting frame (201), a pull rod (205) is threadedly connected to the inner wall of the mounting frame (201), an end of the pull rod (205) passes through the mounting frame (201) and extends to the outside thereof, the end of the pull rod (205) is rotatably connected to a mounting plate (207), a mounting hole (208) is provided at the top of the mounting plate (207), a filter screen (209) is sleeved on the inner wall of the mounting hole (208), and a limit ring (213) is fixedly connected to the outer wall of the filter screen (209); The connecting assembly (3) comprises a first connecting shaft (301), the inner wall of the first connecting shaft (301) is slidably connected to a first cross clamping plate (309), the bottom of the first cross clamping plate (309) extends below the first connecting shaft (301), the inner wall of the first connecting shaft (301) is provided with two moving holes (310), the inner walls of the two moving holes (310) are fixedly connected to second sliding rods (311), the outer walls of the two second sliding rods (311) are sleeved with second springs (312), the first cross clamping plate (309) is provided with a plurality of movable holes (310), and the movable holes (310) are provided with a plurality of movable holes (310). ) having two first sliders (313) fixedly connected to the outer wall, the two first sliders (313) are respectively slidably connected to the inner walls of the corresponding moving holes (310), the ends of the two second sliders (311) respectively penetrate the first sliders (313) and are slidably connected thereto, one end of the second spring (312) is fixedly connected to the first slider (313), the other end of the second spring (312) is fixedly connected to the inner wall of the first connecting shaft (301), and the outer wall of the first cross clamp (309) is fixedly connected to the second connecting shaft (303); The first cross clamping plate (309) located in the upper first connecting shaft (301) squeezes the first cross clamping plate (309) located in the lower first connecting shaft (301) until the bottom of the second connecting shaft (303) located on the upper connecting component (3) contacts the top of the first connecting shaft (301) located on the lower connecting component (3), thereby connecting the multiple connecting components (3) to each other.

2. The multi-stage crushing device for samples used in food laboratory chemical analysis and testing according to claim 1, characterized in that: The collecting assembly (1) comprises a mounting seat (101), the top of the mounting seat (101) being fixedly connected to a collecting barrel (102), an outer wall of the collecting barrel (102) being provided with a material taking opening (103), and the top of the mounting seat (101) being fixedly connected to a supporting column (104).

3. The multi-stage crushing device for samples used in food laboratory chemical analysis and testing according to claim 2, characterized in that: The top of the installation frame (201) is fixedly connected to a connecting pipe (202), the top of the installation frame (201) is provided with a material discharge hole (206), the material discharge hole (206) is located directly below the connecting pipe (202), the outer wall of the connecting pipe (202) located above is fixedly connected to a material discharge hopper (203), the top of the connecting pipe (202) on the screening component (2) located below is fixedly connected to the installation frame (201) on the screening component (2) located above, the bottom of the installation frame (201) on the screening component (2) located at the bottom is fixedly connected to the collecting cylinder (102), and the bottom of the installation frame (201) on the screening component (2) located at the bottom is fixedly connected to the supporting column (104).

4. The multi-stage crushing device for samples used in food laboratory chemical analysis and testing according to claim 3, characterized in that: A through hole (210) is provided on the top of the filter screen (209); a connecting hole (211) is provided on the inner wall of the through hole (210); a protrusion (212) is fixedly connected to the inner wall of the connecting hole (211); the end of the protrusion (212) is an arc-shaped structure; and a plurality of slots (214) are provided on the outer wall of the limiting ring (213); A plurality of connecting sleeves (215) are fixedly connected to the inner wall of the mounting hole (208), two limiting holes (216) are provided on the inner wall of the connecting sleeve (215), a first sliding rod (217) is slidably connected to the inner wall of the connecting sleeve (215), two limiting blocks (219) are fixedly connected to the outer wall of the first sliding rod (217), the two limiting blocks (219) are respectively slidably connected to the corresponding inner walls of the limiting holes (216), a first spring (218) is sleeved on the outer end of the first sliding rod (217), a clamping column (220) is fixedly connected to the outer end of each of the first sliding rods (217), the clamping column (220) is clamped and matched with the corresponding clamping groove (214), one end of the first spring (218) is fixedly connected to the clamping column (220), and the other end of the first spring (218) is fixedly connected to the connecting sleeve (215).

5. The multi-stage crushing device for samples used in food laboratory chemical analysis and testing according to claim 4, characterized in that: The outer wall of the first connecting shaft (301) is rotatably connected to a first support plate (305), and both ends of the first support plate (305) are respectively fixedly connected to the inner walls of the corresponding connecting pipes (202).

6. The multi-stage crushing device for samples used in chemical analysis tests in food laboratories according to claim 5, characterized in that: A sliding groove (302) is provided at the bottom of the first connecting shaft (301), the end of the second connecting shaft (303) is slidably connected to the inner wall of the sliding groove (302), the outer wall of the second connecting shaft (303) is fixedly connected to a first rubber ring (307), the outer wall of the second connecting shaft (303) is sleeved with a rotatable second support plate (306), the inner wall of the second support plate (306) is fixedly connected to a second rubber ring (308), the end of the second support plate (306) is fixedly connected to the inner wall of the connecting pipe (202), the outer wall of the second connecting shaft (303) is fixedly connected to a crushing knife (304), and the distance between the crushing knives (304) and the filter screen (209) on the plurality of connecting assemblies (3) decreases from top to bottom.

7. The multi-stage crushing device for samples used in food laboratory chemical analysis and testing according to claim 6, characterized in that: The outer wall of the second connecting shaft (303) is provided with two grooves (314), the inner walls of the two grooves (314) are provided with two movable grooves (315), the inner walls of the movable grooves (315) are fixedly connected with fourth slide bars (324), the circumferential outer walls of the fourth slide bars (324) are sleeved with fourth springs (325), the inner walls of the movable grooves (315) are slidably connected with second slide bars (323), the ends of the fourth slide bars (324) pass through the second slide bars (323) and are slidably connected thereto, the inner walls of the grooves (314) are slidably connected with convex plates (321), the two ends of the convex plates (321) are respectively fixedly connected with the corresponding second slide bars (323), the outer walls of the convex plates (321) are fixedly connected with stoppers (326), and the outer walls of the convex plates (321) are provided with guide grooves (322); One end of the fourth spring (325) is fixedly connected to the second sliding block (323), and the other end of the fourth spring (325) is fixedly connected to the inner wall of the second connecting shaft (303).

8. The multi-stage crushing device for samples used in food laboratory chemical analysis and testing according to claim 7, characterized in that: The bottom of the second connecting shaft (303) is slidably connected to two push rods (316), the tops of the two push rods (316) extend into the groove (314), the ends of the push rods (316) are fixedly connected to push blocks (317), the ends of the push blocks (317) extend into the guide groove (322), the tops of the push blocks (317) are fixedly connected to connecting arms (318), the inner walls of the connecting arms (318) are slidably connected to third slide rods (319), the circumferential outer walls of the third slide rods (319) are sleeved with third springs (320), and the ends of the third slide rods (319) are respectively fixedly connected to the inner walls of the second connecting shaft (303); One end of the third spring (320) is fixedly connected to the inner wall of the second connecting shaft (303), and the other end of the third spring (320) is fixedly connected to the connecting arm (318).

9. The multi-stage crushing device for samples used in food laboratory chemical analysis and testing according to claim 8, characterized in that: The driving assembly (4) comprises a third support plate (401), the bottom of the third support plate (401) is fixedly connected to the mounting frame (201) located on the top screening assembly (2), the outer wall of the third support plate (401) is fixedly connected to a support plate (402), the top of the support plate (402) is fixedly connected to a fourth support plate (403), the outer wall of the fourth support plate (403) is fixedly connected to a motor (404), the output end of the motor (404) is fixedly connected to an output shaft (405), and the circumferential outer wall of the output shaft (405) is fixedly connected to a gear (406); The inner wall of the support plate (402) is rotatably connected to an extension shaft (407), and a plurality of convex teeth (408) are fixedly connected to the circumferential outer wall of the extension shaft (407), and the convex teeth (408) mesh with the gear (406). The top of the extension shaft (407) is threadedly connected to an adjusting screw (410), and a limiting groove (409) is provided on the inner wall of the extension shaft (407). A driving shaft (411) is sleeved on the inner wall of the extension shaft (407), and the top of the driving shaft (411) is rotatably connected to the adjusting screw (410), and the driving shaft (411) is slidably connected to the inner wall of the limiting groove (409). The bottom of the driving shaft (411) is fixedly connected to a second cross clamping plate (412), and the end of the second cross clamping plate (412) extends to the outside of the extension shaft (407).

10. A method for a multi-stage crushing device for chemical analysis and testing of food laboratory samples, applicable to the multi-stage crushing device for chemical analysis and testing of food laboratory samples as claimed in claim 9, characterized in that: The following steps are involved: S1. Food is put into the connecting tube (202) through the lower hopper (203). The adjusting screw (410) is rotated to make the driving shaft (411) slide along the limiting groove (409). The driving shaft (411) drives the second cross clamping plate (412) to move. The second cross clamping plate (412) squeezes the first cross clamping plate (309) inside the top first connecting shaft (301), so that the first cross clamping plate (309) slides downward along the inner wall of the first connecting shaft (301). When the first cross clamping plate (309) slides, it drives the crushing knife (304) and the first rubber ring (307) to slide downward, so that the first rubber ring (307) is separated from the second rubber ring. (308), the crushing knife (304) descends to a position close to the filter screen (209), at which time the first cross clamping plate (309) located in the upper first connecting shaft (301) respectively squeezes the first cross clamping plate (309) located in the lower first connecting shaft (301) until the bottom of the second connecting shaft (303) located on the upper connecting component (3) contacts the top of the first connecting shaft (301) located on the lower connecting component (3), thereby connecting multiple connecting components (3) to each other, and when the first cross clamping plate (309) slides, it drives the first sliding block (313) to slide along the second sliding rod (311), and compresses the second spring (312); S2, the motor (404) drives the gear (406) to rotate via the output shaft (405), the gear (406) drives the extension shaft (407) to rotate via the convex teeth (408), the extension shaft (407) drives the internal drive shaft (411) to rotate, the drive shaft (411) drives the second cross clamping plate (412) to rotate, the second cross clamping plate (412) drives the first connecting shaft (301) and the second connecting shaft (303) on the plurality of connecting components (3) to rotate synchronously, and the second connecting shaft (303) drives the crushing knife (304) to rotate, thereby crushing the food, and since the distance between the crushing knife (304) and the filter screen (209) on the plurality of connecting components (3) decreases from top to bottom, the food can be finely processed in sequence; S3. When the second connecting shaft (303) slides downward, its end is inserted into the through hole (210) on the lower filter screen (209). When the bottom of the second connecting shaft (303) on the upper connecting assembly (3) contacts the top of the first connecting shaft (301) on the lower connecting assembly (3), the top of the first connecting shaft (301) on the lower connecting assembly (3) squeezes the stopper (316) on the bottom of the second connecting shaft (303) above it, and the stopper (316) drives the stopper (316) to move. The connecting arm (318) slides along the third sliding rod (319) and squeezes the third spring (320), and at the same time, the push rod (316) pushes the push block (317) to move, and the push block (317) squeezes the convex plate (321), and the convex plate (321) drives the second sliding block (323) to slide along the fourth sliding rod (324) and squeezes the fourth spring (325), until the convex plate (321) pushes the stopper (326) to extend from the inside of the second connecting shaft (303); S4, when the second connecting shaft (303) rotates, the stopper (326) is driven to rotate. When the stopper (326) rotates, the protrusion (212) inside the filter screen (209) is squeezed. When the protrusion (212) is squeezed, the filter screen (209) is driven to move. The filter screen (209) drives the limiting ring (213) to move. The limiting ring (213) squeezes the clamping column (220). The clamping column (220) pushes the first sliding rod (217) to slide toward the inner wall of the connecting sleeve (215). The first sliding rod (217) drives the limiting block (219) to slide along the inner wall of the limiting hole (216). When the clamping column (220) moves, it squeezes the first spring (218), so that the plurality of filter screens (209) can be shaken horizontally, so that the crushed food can be screened; S5, placing a tray for taking out materials inside the collecting cylinder (102), and taking out the tray through the taking out opening (103), so that the crushed food can be taken out for later use; S6. After processing, the second cross clamping plate (412) is pulled out from the top of the first connecting shaft (301) by rotating the adjusting screw rod (410) in the reverse direction. Under the elastic force of the second spring (312), the first cross clamping plate (309) is moved out from above the first connecting shaft (301). When the first cross clamping plate (309) moves, it drives the second connecting shaft (303) to move. The second connecting shaft (303) drives the first rubber ring (307) to move upward and abut against the second rubber ring (308) in the second support plate (306). Through the first rubber ring (307) and the second rubber ring (308), the first rubber ring (307) and the second rubber ring (309) are connected. 8), the friction force between them can fix the angle of the internal hole of the first connecting shaft (301), so that during installation, the first cross clamping plate (309) located in the upper first connecting shaft (301) can be accurately inserted into the hole of the lower first connecting shaft (301), and when two adjacent connecting components (3) are separated from each other, under the elastic force of the third spring (320), the push block (317) moves downward, and under the elastic force of the fourth spring (325), the stop block (326) moves into the second connecting shaft (303), so that the second connecting shaft (303) can be moved out from the lower filter screen (209); S7. By rotating the pull rod (205), the pull rod (205) drives the mounting plate (207) to slide along the inner wall of the mounting frame (201), and the filter screen (209) is moved to below the disassembly hole (204) through the mounting plate (207). By pulling the filter screen (209) upward, the limiting ring (213) is detached from the clamping column (220), and the filter screen (209) can be disassembled and cleaned.

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