Random sampling device for statistics

Abstract

The utility model belongs to the technical field of sample extraction, and provides a random sample extraction device for statistics, which comprises a sampler main body, the bottom of the sampler main body is fixedly connected with a support component, and the front surface of the sampler main body is provided with a sample outlet hole. A hinge and a storage box are fixedly connected to the upper portion and the lower portion, away from the sample outlet hole, of the front face of the sampler body respectively, an opening and closing door is fixedly connected to the front face of the sampler body through the hinge, and a control assembly is fixedly connected to the front face of the opening and closing door; the bottom of the interior of the sampling machine main body is fixedly connected with a sampling motor, the driving end of the sampling motor is fixedly connected with a rotating shaft, the top end of the rotating shaft is fixedly connected with a sampling plate, and sampling holes are formed in the top of the fixed bottom plate and the top of the sampling plate. The samples fall into the conveying groove, so that the probability that each sample is extracted is uniform, and the randomness of random sampling is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sample extraction, in particular to a random sample extraction device for statistics. Background Art

[0002] Sample extraction, also known as sampling, is the process of extracting a part of sample units from all samples to be studied. The basic requirement is to ensure that the extracted sample units are fully representative of all samples. The purpose of sampling is to estimate and infer the characteristics of all samples from the analysis and research results of the extracted sample units. It is an economical and effective work and research method commonly used in scientific experiments, quality inspections, and social surveys.

[0003] The patent document with the prior art announcement number CN220584719U provides a random sampling device for statistics, including a sampler tank body, the inner bottom end of the sampler tank body is fixedly connected to an air induced disk, both sides of the bottom end of the air induced disk are fixedly connected to a blow box, the inner wall of the sampler tank body is fixedly connected to a sample placement disk, the top of the air induced disk is evenly fixedly connected to a plurality of air jet pipe heads, the middle of the air induced disk is fixedly connected to a fixed plate, the middle of the fixed plate is slidably connected to a suction pipe, the top of the suction pipe is fixedly connected to an adsorption sampling head, the bottom end of the suction pipe is fixedly connected to a telescopic hose, and the outer side of the telescopic hose is fixedly connected to a suction frame. In the utility model, the suction pipe is moved upward and lifted out to complete sampling, the sampling is unique, the statistical data of the sampling is more accurate, the step of re-inserting the sampling ball is convenient, and the efficiency of re-sampling is improved.

[0004] However, the existing random sampling device uses wind to blow up the samples during sampling, and the samples enter a specific channel and leave the sampling device for sampling. When the fan is used to blow the samples, the heights to which the samples are blown will be different due to the different weights of the samples. The probability of each sample being randomly selected will also be different due to the different weights of the samples, resulting in the problem of failure to achieve random sampling accuracy.

[0005] Therefore, those skilled in the art have proposed a statistical random sampling device to solve the problem raised by the background technology. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a random sampling device for statistics to solve the problem that when samples with different weights are randomly selected, the probability of each sample being selected will also be different, resulting in the inability to achieve random sampling accuracy.

[0007] A random sampling device for statistics, comprising a sampling machine body, a support assembly fixedly connected to the bottom of the sampling machine body, a sampling hole opened on the front of the sampling machine body, hinges and a storage box fixedly connected to the upper and lower parts of the front of the sampling machine body away from the sampling hole, respectively, a switch door fixedly connected to the front of the sampling machine body through a hinge, and a control assembly fixedly connected to the front of the switch door;

[0008] A fixed bottom plate is fixedly connected inside the sampler body, a sampling motor is fixedly connected to the bottom inside the sampler body, a rotating shaft is fixedly connected to the driving end of the sampling motor, a sampling plate is fixedly connected to the top of the rotating shaft, and sampling holes are provided on the tops of the fixed bottom plate and the sampling plate.

[0009] Preferably, the support assembly comprises a support leg and a mounting plate, the support leg is fixedly connected to the bottom of the sampler body, and the bottom of the support leg is fixedly connected to the mounting plate.

[0010] Preferably, the control component includes an operation panel, a display screen and control buttons. The operation panel is fixedly connected to the front of the switch door. The display screen is embedded in the front of the operation panel. The control buttons are fixedly connected to the side of the front of the operation panel away from the display screen.

[0011] Preferably, a rotating motor is fixedly connected to the top of the sampler body, a stirring shaft is fixedly connected to the driving end of the rotating motor, and a stirring blade is fixedly connected to the outer side of the stirring shaft.

[0012] Preferably, a conveying pipe is fixedly connected to the bottom of the sampling plate, and a conveying trough is fixedly connected to the inner wall of the sampler body.

[0013] Preferably, the sampler body is made of metal material, and the outer surface of the sampler body is smooth.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. When using the statistical random sampling device, the sample to be extracted is placed on the fixed bottom plate inside the sampler body through the switch door, the switch door is closed, and the speed of the rotating motor and the sampling motor is set through the control buttons on the operation panel. The rotating motor drives the stirring blade through the stirring shaft to break up the sample, so that it rolls irregularly on the fixed bottom plate, and the sampling motor rotates the sampling plate through the rotating shaft. When the sample rolls on the fixed bottom plate and falls into the sampling hole, if the two sampling holes coincide, the sample will The sample enters the delivery tube through the sampling hole and falls into the delivery trough. The sample falls into the storage box from the sample outlet hole through the delivery trough. If the sample rolls on the fixed bottom plate and falls into the sampling hole, and the two sampling holes do not overlap, the stirring piece will push the sample out of the sampling hole and continue to roll on the fixed bottom plate until the two sampling holes overlap. The sample just falls from the two sampling holes. The two sampling holes are overlapped by the stirring of the stirring piece and the rotation of the sampling plate, so that the sample falls into the delivery trough, so that the probability of each sample being extracted is unified, thereby improving the randomness of random sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a partial structural schematic diagram of the rotating electrical machine of the utility model;

[0018] Figure 3 It is a partial structural schematic diagram of the sampling plate of the utility model;

[0019] Figure 4 It is a sectional view of the main body of the sampler of the utility model.

[0020] In the figure:

[0021] 1. Sampler body; 2. Support legs; 3. Mounting plate; 4. Rotating motor; 401. Sampling motor; 5. Open / close door; 501. Hinge; 6. Operation panel; 7. Display screen; 8. Control buttons; 9. Sample outlet; 10. Storage box; 11. Rotating shaft; 12. Stirring shaft; 13. Stirring blade; 14. Fixed bottom plate; 15. Sampling hole; 16. Delivery pipe; 17. Delivery trough; 18. Sampling plate. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the implementation of the present utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0023] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0024] As attached Figure 1 To Attachment Figure 4 As shown:

[0025] Embodiment 1: A random sampling device for statistics, comprising a sampling machine body 1, a supporting assembly fixedly connected to the bottom of the sampling machine body 1, a sampling hole 9 opened on the front of the sampling machine body 1, a hinge 501 and a storage box 10 fixedly connected to the upper and lower parts of the front of the sampling machine body 1 away from the sampling hole 9, respectively, a switch door 5 fixedly connected to the front of the sampling machine body 1 through the hinge 501, and a control assembly fixedly connected to the front of the switch door 5;

[0026] A fixed bottom plate 14 is fixedly connected to the interior of the sampler body 1, a sampling motor 401 is fixedly connected to the bottom of the interior of the sampler body 1, a rotating shaft 11 is fixedly connected to the driving end of the sampling motor 401, a sampling plate 18 is fixedly connected to the top of the rotating shaft 11, and sampling holes 15 are provided on the tops of the fixed bottom plate 14 and the sampling plate 18.

[0027] As can be seen from the above, the two sampling holes 15 are overlapped by the stirring of the stirring blade 13 and the rotation of the sampling plate 18, so that the sample falls into the conveying trough 17, and the probability of each sample being extracted is uniform.

[0028] Embodiment 2: The support assembly includes a support leg 2 and a mounting plate 3 . The support leg 2 is fixedly connected to the bottom of the sampler body 1 , and the bottom of the support leg 2 is fixedly connected to the mounting plate 3 .

[0029] As can be seen from the above, the support legs 2 keep the sampler body 1 stable when the rotating motor 4 and the sampling motor 401 are running.

[0030] Embodiment 3: The control component includes an operation panel 6, a display screen 7 and a control button 8. The operation panel 6 is fixedly connected to the front of the switch door 5. The display screen 7 is embedded in the front of the operation panel 6. The control button 8 is fixedly connected to the side of the front of the operation panel 6 away from the display screen 7.

[0031] As can be seen from the above, the rotation speeds of the rotating motor 4 and the sampling motor 401 can be set through the control buttons 8 on the operation panel 6 .

[0032] Embodiment 4: A rotating motor 4 is fixedly connected to the top of the sampler body 1 , a stirring shaft 12 is fixedly connected to the driving end of the rotating motor 4 , and a stirring blade 13 is fixedly connected to the outer side of the stirring shaft 12 .

[0033] As can be seen from the above, the rotating motor 4 drives the stirring blade 13 through the stirring shaft 12 to break up the sample, causing it to roll irregularly on the fixed bottom plate 14 .

[0034] Embodiment 5: A conveying pipe 16 is fixedly connected to the bottom of the sampling plate 18 , and a conveying groove 17 is fixedly connected to the inner wall of the sampler body 1 .

[0035] As can be seen from the above, the sample enters the delivery tube 16 through the sampling hole 15 and falls into the delivery trough 17 .

[0036] Embodiment 6: The sampling machine body 1 is made of metal material, and the outer surface of the sampling machine body 1 is smooth.

[0037] As can be seen from the above, the sampling machine body 1 made of metal material is not easily damaged when the samples roll and collide with each other.

[0038] Working principle: When using the random sampling device for statistics, the sample to be sampled is placed on the fixed bottom plate 14 inside the sampler body 1 through the switch door 5, the switch door 5 is closed, and the rotation speed of the rotating motor 4 and the sampling motor 401 is set through the control button 8 on the operation panel 6. The rotating motor 4 drives the stirring blade 13 through the stirring shaft 12 to break up the sample, so that it rolls irregularly on the fixed bottom plate 14, and the sampling motor 401 rotates the sampling plate 18 through the rotating shaft 11. When the sample rolls on the fixed bottom plate 14 and falls into the sampling hole 15, if the two sampling holes are If the sample holes 15 coincide with each other, the sample will enter the delivery tube 16 through the sampling hole 15 and fall into the delivery groove 17. The sample will fall into the storage box 10 from the sample outlet hole 9 through the delivery groove 17. If the sample rolls on the fixed bottom plate 14 and falls into the sampling hole 15, the two sampling holes 15 do not overlap, and the stirring piece 13 will push the sample out of the sampling hole 15 and continue to roll on the fixed bottom plate 14 until the two sampling holes 15 overlap, and the sample just falls from the two sampling holes 15. In this way, the use process of the utility model is completed. The utility model has a simple structure and is safe and convenient to use.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

[0041] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and deform the above embodiments within the scope of the present invention.

Claims

1. A random sampling device for statistics, characterized in that: The sampler comprises a sampler body (1), the bottom of which is fixedly connected to a support assembly, the front of which is provided with a sample outlet (9), the front of which is away from the sample outlet (9) being fixedly connected to a hinge (501) and a storage box (10) respectively above and below the front of the sampler body (1), the front of which is fixedly connected to a switch door (5) via a hinge (501), and the front of the switch door (5) being fixedly connected to a control assembly; A fixed bottom plate (14) is fixedly connected inside the sampler body (1), a sampling motor (401) is fixedly connected to the bottom inside the sampler body (1), a driving end of the sampling motor (401) is fixedly connected to a rotating shaft (11), a top end of the rotating shaft (11) is fixedly connected to a sampling plate (18), and sampling holes (15) are provided at the tops of the fixed bottom plate (14) and the sampling plate (18).

2. A statistical random sampling device as claimed in claim 1, characterized in that: The support assembly comprises a support leg (2) and a mounting plate (3); the support leg (2) is fixedly connected to the bottom of the sampler body (1); and the bottom of the support leg (2) is fixedly connected to the mounting plate (3).

3. A statistical random sampling device as claimed in claim 1, characterized in that: The control component comprises an operation panel (6), a display screen (7) and a control button (8); the operation panel (6) is fixedly connected to the front of the switch door (5); the display screen (7) is embedded in the front of the operation panel (6); and the control button (8) is fixedly connected to the side of the front of the operation panel (6) away from the display screen (7).

4. A statistical random sampling device as claimed in claim 1, characterized in that: A rotating motor (4) is fixedly connected to the top of the sampler body (1), a stirring shaft (12) is fixedly connected to the driving end of the rotating motor (4), and a stirring blade (13) is fixedly connected to the outer side of the stirring shaft (12).

5. A statistical random sampling device as claimed in claim 1, characterized in that: The bottom of the sampling plate (18) is fixedly connected to a delivery pipe (16), and the inner wall of the sampling machine body (1) is fixedly connected to a delivery groove (17).

6. A statistical random sampling device as claimed in claim 1, characterized in that: The sampler body (1) is made of metal material, and the outer surface of the sampler body (1) is smooth.

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