Sampling system

Abstract

The utility model discloses a sampling system, relates to grain detection technical field, wherein the sampling system includes mounting platform, sampler and a plurality of hold-down subassembly, mounting platform includes platform part and a plurality of support part, is equipped with the negative pressure cabin on the platform part, each support part is equipped with a plurality of connecting rod; the sampler is used for sampling unprocessed grains, a plurality of stand columns are arranged on the sampler, the number of the stand columns is consistent with that of the supporting parts, the stand columns and the supporting parts are arranged in a one-to-one correspondence mode, the bottoms of the stand columns abut against the supporting parts, the negative pressure cabin is used for providing negative pressure for the sampler, and supporting feet are arranged at the bottoms of the supporting parts; each pressing assembly comprises a pressing rod and a pressing piece. According to the utility model, the connecting rod on the mounting platform is matched with the upright post and the pressing component of the sampler, so that the sampler can be quickly disassembled and assembled, the mounting process is shortened, the sampler can be quickly mounted and put into use in emergency, and the cost is reduced because the processes of concrete pouring, frame mounting and the like are not needed.

Description

TECHNICAL FIELD

[0001] The utility model relates to grain detection technical field, especially a kind of sampling system. BACKGROUND

[0002] Sampling machine is a kind of equipment in grain industry, because it can reduce personnel investment, improve operation efficiency, avoid cheating phenomenon and be widely applied.But because of the acquisition characteristics of grain in two seasons a year, after installing sampling machine in grain depot, it is only used in grain acquisition season, and after completing acquisition business, it is idle, and cannot play its maximum value;At the same time, the installation process of sampling machine is complicated, and it usually needs to pour concrete, install frame and other complex processes to realize installation, which leads to long installation process, cannot be applied in time when facing emergency, consumes much money, especially some small grain depots in some places, without fund support, or unable to provide large area installation sampling machine, and still adopt manual sampling. SUMMARY

[0003] The utility model mainly aims at providing a kind of sampling system, to solve the problem of long installation process of sampling machine in prior art, cannot be applied in time, consumes much money.

[0004] To achieve the above-mentioned purpose, the utility model provides a kind of sampling system, comprising:

[0005] Installation platform, the installation platform includes platform part and multiple support parts, negative pressure cabin is provided on the platform part, multiple connecting rods are provided on each support part;

[0006] Sampling machine, the sampling machine is used for sampling raw grain, multiple vertical columns are provided on the sampling machine, the number of vertical columns and the number of support parts are consistent and one-to-one correspondence, the bottom of vertical column is used for abutting with support part, multiple connecting rods are arranged on the outer periphery of vertical column when vertical column abuts with support part, negative pressure cabin is used for providing negative pressure for sampling machine, the bottom of support part is provided with supporting leg, supporting leg is arranged at the outer periphery of vertical column in interval;

[0007] Multiple compression assemblies, each compression assembly includes compression rod and compression piece, both ends of each compression rod are provided with insertion hole for connecting rod to pass through, compression rod abuts with vertical column when insertion hole is inserted and matched, compression piece is used for abutting tightly compression rod and vertical column.

[0008] In an embodiment, the vertical column includes vertical rod and base, the bottom of the base abuts with the support part, the top of the base is connected with the vertical rod, the bottom of the base forms a staircase, the top surface of the staircase forms an abutting surface, the compression rod abuts with the abutting surface when insertion hole is inserted and matched.

[0009] In an embodiment, the support parts and the base are cuboids, and each of the support parts is provided with four connecting rods arranged at four corners of the base.

[0010] In an embodiment, the connecting rod is a screw rod, and the pressing member is a nut, which is threadedly connected with the connecting rod to press the pressing rod against the abutting surface.

[0011] In an embodiment, the sampling machine further comprises a guide rail, a walking frame, a driving module and a sampling device, a plurality of the stand columns are connected at intervals at the bottom of the guide rail, the sampling device is slidingly connected to the guide rail through the walking frame, the driving module is used to drive the walking frame to slide along the guide rail, the sampling device is used to sample raw grains, and the negative pressure cabin provides negative pressure for the sampling device through a sampling pipeline.

[0012] In an embodiment, the sampling device comprises a rotating seat, a cantilever, a first connecting rod, a second connecting rod and a sampling rod, the rotating seat is rotatably mounted on the walking frame, the cantilever is mounted on the rotating seat and extends away from the rotating seat, the first connecting rod is rotatably connected to the rotating seat and arranged in parallel to the cantilever, one end of the first connecting rod away from the rotating seat is connected with the second connecting rod, the second connecting rod is rotatably connected to one end of the cantilever away from the rotating seat, one end of the second connecting rod away from the first connecting rod is connected with the sampling rod, and the sampling rod is hollow and communicates with the sampling pipeline.

[0013] In an embodiment, the rotating seat is further provided with a buffer, the buffer comprises a sleeve, an extension shaft and an elastic member, the extension shaft is arranged in the sleeve, the elastic member is sleeved outside the extension shaft and located between the extension shaft and the sleeve, the elastic member connects the sleeve and the extension shaft, and the extension shaft is connected with the first connecting rod.

[0014] In an embodiment, the negative pressure cabin comprises an outer shell, a negative pressure machine, a sample bin and a temporary storage cabinet, an installation cavity is formed in the outer shell, the negative pressure machine, the sample bin and the temporary storage cabinet are arranged in the installation cavity, the temporary storage cabinet communicates with the sampling pipeline, the temporary storage cabinet is used to screen grains and is provided with a storage cavity for temporarily storing grains, the negative pressure machine communicates with the storage cavity and is used to generate negative pressure, an output pipeline connecting the storage cavity and the sample bin is arranged at the storage cavity, and the sample bin is used to store grains and deliver the grains to external inspection equipment through a sample delivery pipeline.

[0015] In an embodiment, the sampling system further comprises a surplus grain returning device, the surplus grain returning device comprising a support, a cross arm, a rotary drive and a hopper, the cross arm being mounted on the guide rail through the support, the hopper being located at an end of the cross arm away from the support, the rotary drive being used to drive the cross arm to rotate to drive the hopper to rotate, the hopper being in communication with the storage cavity through a surplus grain pipeline and being used to transport the screened surplus grain.

[0016] In an embodiment, the guide rail comprises:

[0017] a bottom plate, a bottom of the bottom plate being provided with the stand;

[0018] two walking parts, the two walking parts being protruded on the bottom plate and being spaced apart and located at two sides in a width direction of the bottom plate, a bottom of the walking frame being provided with a pulley, the walking frame being in sliding contact with the two walking parts through the pulley.

[0019] The technical scheme of the utility model discloses a stand and a supporting part are arranged at the bottom of the sampling machine, a connecting rod is arranged on the mounting platform, the connecting rod is penetrated by the pressing rod after abutting against the stand and the supporting part, the pressing rod is abutted tightly with the stand through the pressing part, the pressing rod is arranged at the outer periphery of the stand, the movement of the stand in the horizontal direction is limited, the pressing rod abutted tightly provides the force in the vertical direction to the stand, the movement of the stand in the vertical direction is avoided, the sampling machine and the mounting platform are quickly mounted, and the complex processes such as concrete pouring and frame installation are not needed. The connecting rod on the mounting platform is matched with the stand of the sampling machine and the pressing assembly, the sampling machine is quickly disassembled and assembled, the installation process is shortened, the sampling machine can be quickly installed and used in the emergency, the processes such as concrete pouring and frame installation are not needed, the cost is reduced, the fund consumption is reduced, the sampling machine can be recycled and used, the rental cost is further reduced, the sampling machine can be used in the local small grain depot, and the sampling efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the structure shown in the drawings without the creative labor for the ordinary skilled in the art.

[0021] Figure 1 The structure schematic view of the sampling system provided by the utility model in one view is provided.

[0022] Figure 2 The structure schematic view of the sampling system provided by the utility model in another view is provided.

[0023] Figure 3 A structure schematic view of a stand column and a guide rail of the sampling system is provided in the utility model;

[0024] Figure 4 A structure schematic view of a stand column and a support part of the sampling system is provided in the utility model;

[0025] Figure 5 A structure schematic view of a sampling device of the sampling system is provided in the utility model;

[0026] Figure 6 A structure schematic view of a negative pressure cabin of the sampling system is provided in the utility model;

[0027] Figure 7 A structure schematic view of a buffer of the sampling system is provided in the utility model;

[0028] Figure 8 A structure schematic view of a residual food returning device of the sampling system is provided in the utility model.

[0029] Explanation of the drawing reference numerals:

[0030] 100, a sampling system; 1, a mounting platform; 11, a platform part; 12, a support part; 13, a connecting rod; 14, a supporting leg; 2, a negative pressure cabin; 21, an outer shell; 22, a negative pressure machine; 23, a sample bin; 24, a temporary storage cabinet; 3, a sampling machine; 31, a stand column; 311, a stand rod; 312, a base; 313, an abutting surface; 314, a step; 32, a guide rail; 321, a bottom plate; 322, a walking part; 33, a walking frame; 331, a pulley; 34, a driving module; 35, a sampling device; 351, a rotating seat; 352, a cantilever; 353, a first connecting rod; 354, a second connecting rod; 355, a sampling rod; 36, a buffer; 361, a sleeve; 362, an extension shaft; 363, an elastic piece; 4, a pressing assembly; 41, a pressing rod; 42, a pressing piece; 50, a residual food returning device; 51, a support; 52, a cross arm; 53, a rotary driving piece; 54, a hopper; 60, a sampling pipeline.

[0031] The utility model aims at realizing, function characteristics and advantages will combine embodiment, refer to the drawing and make further explanation. Specific implementation

[0032] The technical scheme in the utility model embodiment will be described clearly and completely in combination with the drawings in the utility model embodiment. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0033] It should be noted that if the embodiments of the utility model have directionality indication (such as up, down, left, right, front, back, etc.), the directionality indication is only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture, if the specific posture changes, then the directionality indication also changes accordingly.

[0034] In addition, if the embodiments of the utility model have descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled personnel in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the protection scope required by the utility model.

[0035] Due to the one-year two-season acquisition characteristics of grain, after the installation of the sampling machine in the grain depot, it is only used in the grain acquisition season, and after the completion of the acquisition business, it is idle and cannot maximize its value. At the same time, the installation process of the sampling machine is complicated, and usually needs to pour concrete, install the frame and other complex processes to realize the installation, which leads to a long installation process and cannot be applied in time when facing unexpected situations, consumes a lot of money, especially some small grain depots in some places, which cannot provide a large area to install the sampling machine, and still use manual sampling.

[0036] To solve the above problems, the utility model provides a sampling system 100.

[0037] Please combine Figures 1 to 4The sampling system 100 of the embodiment comprises a mounting platform 1, a sampling machine 3 and a plurality of pressing assemblies 4, the mounting platform 1 comprises a platform part 11 and a plurality of support parts 12, the platform part 11 is provided with a negative pressure cabin 2, and each support part 12 is provided with a plurality of connecting rods 13; the sampling machine 3 is used for sampling raw grains, and a plurality of stand columns 31 are arranged on the sampling machine 3, the number of the stand columns 31 is consistent with and one-to-one corresponds to the number of the support parts 12, the bottom of each stand column 31 is used for abutting against the support part 12, when the stand column 31 abuts against the support part 12, the plurality of connecting rods 13 are arranged around the outer periphery of the stand column 31, the negative pressure cabin 2 is used for providing negative pressure for the sampling machine 3, the bottom of each support part 12 is provided with a supporting leg 14, and the supporting legs 14 are arranged at intervals around the outer periphery of the support part 12; each pressing assembly 4 comprises a pressing rod 41 and a pressing part 42, both ends of each pressing rod 41 are provided with insertion holes through which the connecting rods 13 pass, the pressing rod 41 abuts against the stand column 31 when the pressing rod 41 is inserted into the insertion hole, and the pressing part 42 is used for abutting tightly the pressing rod 41 against the stand column 31.

[0038] It can be understood that the mounting platform 1 has a large load mass, can bear the negative pressure cabin 2 and meet the strength requirement of the operation of the sampling machine 3, all the negative pressure related components are integrated in the negative pressure cabin 2 in the application, hoisting and installation are facilitated, assembly efficiency and speed are further improved, the bottom of each support part 12 is provided with a supporting leg 14, the supporting legs 14 are arranged at intervals around the outer periphery of the stand column 31, thereby supporting the support part 12 and uniformly dispersing the stress of the support part 12 on the plane, and stress concentration is avoided to cause damage of the support part 12.

[0039] The technical scheme of the utility model sets the stand column 31 at the bottom of the sampling machine 3, sets the support part 12 on the mounting platform 1, passes the connecting rod 13 on the support part 12 through the pressing rod 41 after abutting the stand column 31 against the support part 12, abuts the pressing rod 41 against the stand column 31 through the pressing part 42, sets the pressing rod 41 around the outer periphery of the stand column 31, limits the movement of the stand column 31 in the horizontal direction, abuts the pressing rod 41 against the stand column 31 in the vertical direction, avoids the movement of the stand column 31 in the vertical direction, thereby quickly installs the sampling machine 3 and the mounting platform 1, and complex processes such as concrete pouring and installation frame are not needed.

[0040] In an embodiment, the column 31 comprises a stand 311 and a base 312, the bottom of the base 312 abuts against the support part 12, the top of the base 312 is connected with the stand 311, the bottom of the base 312 is formed with a step, and the top surface of the step forms an abutting surface 313, and the pressing rod 41 abuts against the abutting surface 313 when the plug is plugged into the socket. By forming a step at the bottom of the base 312 and forming the top surface of the step as the abutting surface 313, the contact area of the pressing rod 41 with the base 312 is increased, thereby improving the fixing effect of the pressing rod 41 on the base 312, and the entire sampling machine 3 is more stable.

[0041] Specifically, the support part 12 and the base 312 are both cuboids, and four connecting rods 13 are arranged on each support part 12, and the four connecting rods 13 are arranged at the four corners of the base 312. By arranging the connecting rods 13 at the four corners of the base 312 on the support part 12, the four connecting rods 13 serve as force transmission and distribution points, which can more evenly bear the pressure of the sampling machine 3 and reduce the shaking or tilting of the sampling machine 3. The stability of the entire sampling system 100 can be effectively improved, and the force can be avoided from being concentrated on a specific point, the local stress can be reduced, and the service life of the sampling system 100 can be prolonged.

[0042] In an embodiment, the connecting rod 13 is a screw rod, and the pressing member 42 is a nut, and the pressing member 42 is threadedly connected with the connecting rod 13 to tightly abut the pressing rod 41 against the abutting surface 313. By threadedly connecting the nut with the screw rod, the contact between the pressing rod 41 and the abutting surface 313 is more closely, the connecting rod 13 and the pressing rod 41 are prevented from loosening or falling off, the entire structure is more stable, the reliability of the connection is ensured, the loosening caused by vibration or other external forces during sampling is reduced, and the stability and safety of the operation of the sampling system 100 are improved.

[0043] Please refer to Figure 3 and Figure 5 , further, the sampling machine 3 further comprises a guide rail 32, a walking frame 33, a driving module 34 and a sampling device 35, a plurality of columns 31 are connected at intervals at the bottom of the guide rail 32, the sampling device 35 is slidably connected to the guide rail 32 through the walking frame 33, the driving module is used to drive the walking frame 33 to slide along the guide rail 32, the sampling device 35 is used to sample raw grains, and the negative pressure cabin 2 provides negative pressure for the sampling device 35 through the sampling pipeline 60. The guide rail 32 cooperates with the walking frame 33 to reduce the frictional resistance during the movement of the sampling device 35, so that the sampling device 35 can be driven to move along the guide rail 32 by the driving module 34 with smaller power, thereby reducing the cost and the overall weight, and the sampling range of the sampling device 35 is larger when the sampling device 35 is driven to move along the guide rail 32 by the driving module 34, thereby improving the applicable scenarios,

[0044] Specifically, the sampling device 35 comprises a rotating seat 351, a cantilever 352, a first connecting rod 353, a second connecting rod 354 and a sampling rod 355, the rotating seat 351 is rotatably mounted on the walking frame 33, the cantilever 352 is mounted on the rotating seat 351 and extends away from the rotating seat 351, the first connecting rod 353 is rotatably connected to the rotating seat 351 and is arranged parallel to the cantilever 352, one end of the first connecting rod 353 away from the rotating seat 351 is connected with the second connecting rod 354, the second connecting rod 354 is rotatably connected to one end of the cantilever 352 away from the rotating seat 351, one end of the second connecting rod 354 away from the first connecting rod 353 is connected with the sampling rod 355, the sampling rod 355 is hollow and communicates with the sampling pipeline 60. Through the cooperation of the rotating seat 351, the walking frame 33, the guide rail 32 and the driving module 34, the sampling rod 355 can perform sampling operation in any direction of the extension path of the guide rail 32, the flexibility of sampling and the sampling range of the sampling rod 355 are improved, the first connecting rod 353 and the rotating seat 351 are rotatable and the second connecting rod 354 and the cantilever 352 are rotatable to form a planar connecting rod mechanism, further improving the rotation flexibility of the sampling rod 355, and at the same time, the sampling rod 355 always maintains a vertical state during downward sampling, which can ensure accurate downward sampling and maintain a vertical path when sampling into the grain pile, so as to avoid bending.

[0045] Please refer to Figure 5 and Figure 7 In an embodiment, the rotating seat 351 is further provided with a buffer 36, the buffer 36 comprises a sleeve 361, a telescopic shaft 362 and an elastic member 363, the telescopic shaft 362 is arranged in the sleeve 361, the elastic member 363 is sleeved outside the telescopic shaft 362 and located between the telescopic shaft 362 and the sleeve 361, the elastic member 363 connects the sleeve 361 and the telescopic shaft 362, and the telescopic shaft 362 is connected with the first connecting rod 353. During actual sampling, the sampling rod 355 may exist lateral deviation during downward sampling, the buffer 36 buffers the lateral deviation of the sampling rod 355 during downward sampling through the connection of the telescopic shaft 362 and the first connecting rod 353, avoids bending and damage of the sampling rod 355, and prolongs the service life of the sampling rod 355.

[0046] Please refer to Figure 1 and Figure 6In an embodiment, the negative pressure cabin 2 comprises a shell 21, a negative pressure machine 22, a sample bin 23 and a temporary storage cabinet 24, the shell 21 forms a mounting cavity inside, the negative pressure machine 22, the sample bin 23 and the temporary storage cabinet 24 are all arranged in the mounting cavity, the temporary storage cabinet 24 is communicated with the sampling pipeline 60, the temporary storage cabinet 24 is used for screening the grain and is provided with a storage cavity for temporarily storing the grain, the negative pressure machine 22 is communicated with the storage cavity and is used for generating negative pressure, the storage cavity is provided with an output pipeline connecting the storage cavity and the sample bin 23, the sample bin 23 is used for storing the grain and conveying the grain to an external inspection device through a sample pipeline. The shell 21 is used for protecting the negative pressure machine 22, the sample bin 23 and the temporary storage cabinet 24 and other equipment from the external environment, avoiding damage to them, prolonging the service life of the above-mentioned equipment, at the same time, the temporary storage cabinet 24, the negative pressure machine 22 and the sample bin 23 are all integrated in the negative pressure cabin 2, which is convenient for hoisting and installation, further improves the assembly efficiency and improves the assembly speed.

[0047] Please refer to Figure 1 and Figure 8 In an embodiment, the sampling system 100 further comprises a residual grain returning device 50, the residual grain returning device 50 comprises a bracket 51, a cross arm 52, a rotary driving member 53 and a hopper 54, the cross arm 52 is installed on the guide rail 32 through the bracket 51, the hopper 54 is located at one end of the cross arm 52 away from the bracket 51, the rotary driving member 53 is used for driving the cross arm 52 to rotate to drive the hopper 54 to rotate, the hopper 54 is communicated with the storage cavity through a residual grain pipeline and is used for conveying the screened residual grain. The rotary driving member 53 drives the cross arm 52 to drive the hopper 54 to return the excess residual grain in the storage cavity, which reduces the waste of grain and reduces the sampling loss, and the residual grain can be returned to the driver's vehicle, reducing the involvement of personnel and reducing labor costs.

[0048] Please refer to Figure 3 In an embodiment, the guide rail 32 comprises a bottom plate 321 and two walking parts 322, the bottom plate 321 is provided with a stand 31 at the bottom; the two walking parts 322 are protruded on the bottom plate 321 and are arranged at two sides of the width direction of the bottom plate 321, the bottom of the walking frame 33 is provided with a pulley 331, and the walking frame 33 is in sliding contact with the two walking parts 322 through the pulley 331. The sliding contact of the pulley 331 with the walking part 322 can be limited by the pulley 331 on one hand, improve the stability of the walking frame 33, avoid the walking frame 33 from deviating, at the same time, the pulley 331 can run smoothly in the sliding process, so that the sampling rod 355 moves more stably, avoids vibration and other damages to the connecting structure of the sampling rod 355, and improves the safety of the sampling rod 355.

[0049] The above only describes optional embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields under the concept of the present application and using the content of the present application specification and drawings is included in the patent protection scope of the present application.

Claims

1. A sampling system characterized by, The utility model relates to a kind of negative pressure sampling machine, including: mounting platform, the mounting platform includes platform part and multiple support parts, the platform part is provided with negative pressure cabin, each support part is provided with multiple connecting rods;Sampling machine, the sampling machine is used to sample raw grain, the sampling machine is provided with multiple columns, the number of column and the number of support part is consistent and is set one by one, the bottom of column is used to abut with support part, when column abuts with support part, multiple connecting rods are surrounded in the outer periphery of column, negative pressure cabin is used to provide negative pressure for sampling machine, the bottom of support part is provided with support leg, support leg is spaced apart and set in the outer periphery of column. The utility model relates to a kind of negative pressure sampling machine, including: mounting platform, the mounting platform includes platform part and multiple support parts, the platform part is provided with negative pressure cabin, each support part is provided with multiple connecting rods;Sampling machine, the sampling machine is used to sample raw grain, the sampling machine is provided with multiple columns, the number of column and the number of support part is consistent and is set one by one, the bottom of column is used to abut with support part, when column abuts with support part, multiple connecting rods are surrounded in the outer periphery of column, negative pressure cabin is used to provide negative pressure for sampling machine, the bottom of support part is provided with support leg, support leg is spaced apart and set in the outer periphery of column. The utility model relates to a kind of negative pressure sampling machine, including: mounting platform, the mounting platform includes platform part and multiple support parts, the platform part is provided with negative pressure cabin, each support part is provided with multiple connecting rods;Sampling machine, the sampling machine is used to sample raw grain, the sampling machine is provided with multiple columns, the number of column and the number of support part is consistent and is set one by one, the bottom of column is used to abut with support part, when column abuts with support part, multiple connecting rods are surrounded in the outer periphery of column, negative pressure cabin is used to provide negative pressure for sampling machine, the bottom of support part is provided with support leg, support leg is spaced apart and set in the outer periphery of column. The utility model relates to a kind of negative pressure sampling machine, including: mounting platform, the mounting platform includes platform part and multiple support parts, the platform part is provided with negative pressure cabin, each support part is provided with multiple connecting rods;Sampling machine, the sampling machine is used to sample raw grain, the sampling machine is provided with multiple columns, the number of column and the number of support part is consistent and is set one by one, the bottom of column is used to abut with support part, when column abuts with support part, multiple connecting rods are surrounded in the outer periphery of column, negative pressure cabin is used to provide negative pressure for sampling machine, the bottom of support part is provided with support leg, support leg is spaced apart and set in the outer periphery of column.

2. The sampling system of claim 1, wherein, The utility model relates to a kind of negative pressure sampling machine, including: mounting platform, the mounting platform includes platform part and multiple support parts, the platform part is provided with negative pressure cabin, each support part is provided with multiple connecting rods;Sampling machine, the sampling machine is used to sample raw grain, the sampling machine is provided with multiple columns, the number of column and the number of support part is consistent and is set one by one, the bottom of column is used to abut with support part, when column abuts with support part, multiple connecting rods are surrounded in the outer periphery of column, negative pressure cabin is used to provide negative pressure for sampling machine, the bottom of support part is provided with support leg, support leg is spaced apart and set in the outer periphery of column.

3. The sampling system of claim 2, wherein, The utility model relates to a kind of negative pressure sampling machine, including: mounting platform, the mounting platform includes platform part and multiple support parts, the platform part is provided with negative pressure cabin, each support part is provided with multiple connecting rods;Sampling machine, the sampling machine is used to sample raw grain, the sampling machine is provided with multiple columns, the number of column and the number of support part is consistent and is set one by one, the bottom of column is used to abut with support part, when column abuts with support part, multiple connecting rods are surrounded in the outer periphery of column, negative pressure cabin is used to provide negative pressure for sampling machine, the bottom of support part is provided with support leg, support leg is spaced apart and set in the outer periphery of column.

4. The sampling system of claim 2, wherein, The utility model relates to a kind of negative pressure sampling machine, including: mounting platform, the mounting platform includes platform part and multiple support parts, the platform part is provided with negative pressure cabin, each support part is provided with multiple connecting rods;Sampling machine, the sampling machine is used to sample raw grain, the sampling machine is provided with multiple columns, the number of column and the number of support part is consistent and is set one by one, the bottom of column is used to abut with support part, when column abuts with support part, multiple connecting rods are surrounded in the outer periphery of column, negative pressure cabin is used to provide negative pressure for sampling machine, the bottom of support part is provided with support leg, support leg is spaced apart and set in the outer periphery of column.

5. The sampling system of any one of claims 1 to 4, wherein, The utility model relates to a kind of negative pressure sampling machine, including: mounting platform, the mounting platform includes platform part and multiple support parts, the platform part is provided with negative pressure cabin, each support part is provided with multiple connecting rods;Sampling machine, the sampling machine is used to sample raw grain, the sampling machine is provided with multiple columns, the number of column and the number of support part is consistent and is set one by one, the bottom of column is used to abut with support part, when column abuts with support part, multiple connecting rods are surrounded in the outer periphery of column, negative pressure cabin is used to provide negative pressure for sampling machine, the bottom of support part is provided with support leg, support leg is spaced apart and set in the outer periphery of column.

6. The sampling system of claim 5, wherein, The utility model relates to a kind of negative pressure sampling machine, including: mounting platform, the mounting platform includes platform part and multiple support parts, the platform part is provided with negative pressure cabin, each support part is provided with multiple connecting rods;Sampling machine, the sampling machine is used to sample raw grain, the sampling machine is provided with multiple columns, the number of column and the number of support part is consistent and is set one by one, the bottom of column is used to abut with support part, when column abuts with support part, multiple connecting rods are surrounded in the outer periphery of column, negative pressure cabin is used to provide negative pressure for sampling machine, the bottom of support part is provided with support leg, support leg is spaced apart and set in the outer periphery of column.

7. The sampling system of claim 6, wherein, The utility model relates to a kind of negative pressure sampling machine, including: mounting platform, the mounting platform includes platform part and multiple support parts, the platform part is provided with negative pressure cabin, each support part is provided with multiple connecting rods;Sampling machine, the sampling machine is used to sample raw grain, the sampling machine is provided with multiple columns, the number of column and the number of support part is consistent and is set one by one, the bottom of column is used to abut with support part, when column abuts with support part, multiple connecting rods are surrounded in the outer periphery of column, negative pressure cabin is used to provide negative pressure for sampling machine, the bottom of support part is provided with support leg, support leg is spaced apart and set in the outer periphery of column. The utility model relates to a kind of negative pressure sampling machine, including: mounting platform, the mounting platform includes platform part and multiple support parts, the platform part is provided with negative pressure cabin, each support part is provided with multiple connecting rods;Sampling machine, the sampling machine is used to sample raw grain, the sampling machine is provided with multiple columns, the number of column and the number of support part is consistent and is set one by one, the bottom of column is used to abut with support part, when column abuts with support part, multiple connecting rods are surrounded in the outer periphery of column, negative pressure cabin is used to provide negative pressure for sampling machine, the bottom of support part is provided with support leg, support leg is spaced apart and set in the outer periphery of column. The utility model relates to a kind of negative pressure sampling machine, including: mounting platform, the mounting platform includes platform part and multiple support parts, the platform part is provided with negative pressure cabin, each support part is provided with multiple connecting rods;Sampling machine, the sampling machine is used to sample raw grain, the sampling machine is provided with multiple columns, the number of column and the number of support part is consistent and is set one by one, the bottom of column is used to abut with support part, when column abuts with support part, multiple connecting rods are surrounded in the outer periphery of column, negative pressure cabin is used to provide negative pressure for sampling machine, the bottom of support part is provided with support leg, support leg is spaced apart and set in the outer periphery of column. The utility model relates to a kind of negative pressure sampling machine, including: mounting platform, the mounting platform includes platform part and multiple support parts, the platform part is provided with negative pressure cabin, each support part is provided with multiple connecting rods;Sampling machine, the sampling machine is used to sample raw grain, the sampling machine is provided with multiple columns, the number of column and the number of support part is consistent and is set one by one, the bottom 8. The sampling system of claim 6, wherein, The negative pressure cabin comprises an outer shell, a negative pressure machine, a sample bin and a temporary storage cabinet, an installation cavity is formed in the outer shell, the negative pressure machine, the sample bin and the temporary storage cabinet are arranged in the installation cavity, the temporary storage cabinet is communicated with the sample pipeline, the temporary storage cabinet is used for screening the grain and is provided with a storage cavity for temporarily storing the grain, the negative pressure machine is communicated with the storage cavity and is used for generating negative pressure, an output pipeline connecting the storage cavity and the sample bin is arranged at the storage cavity, the sample bin is used for storing the grain and conveying the grain to external inspection equipment through a sample pipeline.

9. The sampling system of claim 8, wherein, The sampling system further comprises a residual grain returning device, the residual grain returning device comprises a support, a cross arm, a rotary driving member and a hopper, the cross arm is mounted on the guide rail through the support, the hopper is located at one end of the cross arm away from the support, the rotary driving member is used for driving the cross arm to rotate to drive the hopper to rotate, the hopper is communicated with the storage cavity through a residual grain pipeline and is used for conveying the screened residual grain.

10. The sampling system of claim 5, wherein, The guide rail comprises: a bottom plate, the bottom plate is provided with the stand column at the bottom; two walking parts, the two walking parts are protruded on the bottom plate and are arranged at two sides in the width direction of the bottom plate, the walking frame is provided with a pulley at the bottom, and the walking frame is in sliding contact with the two walking parts through the pulley.

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