Stratified sampling device for application statistics

Abstract

The utility model relates to the technical field of statistics, in particular to a stratified sampling device for application statistics. According to the technical scheme, the device comprises a random sampling mechanism, the random sampling mechanism comprises two sets of sample barrels, a fixing plate and an outer tooth rotating plate are arranged in each sample barrel, a plurality of sets of sample balls are arranged in the positions, located above the outer tooth rotating plates, in the sample barrels, and a three-way guide pipe is arranged below the two sets of sample barrels; a layered bottom bin is arranged below the sample barrel, and a sample collecting box is arranged in the layered bottom bin. Sample balls in a sample barrel can be stirred and rolled through a first motor, a connecting rod and a stirring shifting piece in the random sampling mechanism, and meanwhile, through the arrangement of an outer tooth rotating plate and a fixing plate matched with a second motor and a driving gear, the sample balls can randomly fall one by one through sample falling holes in the rolling state; and the whole device is automatically operated through a mechanical structure, so that errors caused by interference of external factors in manual sampling are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to statistical technical field especially, relates to a layered sampling device for application statistics. BACKGROUND

[0002] The layered sampling method is also called the type sampling method. It is a method of randomly sampling samples (individuals) from different layers according to a specified proportion from a population that can be divided into different sub-populations (or called layers). The advantage of this method is that the representativeness of the sample is better, and the sampling error is smaller.

[0003] In the teaching process, simple sampling is generally to divide the total amount of samples into different sub-populations, place the different sub-populations in different containers, and determine the number of samples needed in each sub-population according to the required samples and the total amount of samples, and then extract them to achieve the purpose of layered sampling. The existing random sampling device has the problem of low efficiency of counting by manual operation, and the sampling device is difficult to realize automatic control, and manual sampling is prone to cause large sampling error due to external interference. Therefore, we specially propose a layered sampling device for application statistics. UTILITY MODEL CONTENT

[0004] The utility model aims at the problems existing in the background art, and provides a layered sampling device for application statistics.

[0005] The technical scheme of the utility model: a layered sampling device for application statistics, comprising a random sampling mechanism, the random sampling mechanism comprises two groups of sample barrels, a motor one is arranged above each group of sample barrels, an output end of the motor one is connected with a connecting rod, a plurality of stirring paddles are arranged on the outer circle of one end of the connecting rod away from the motor one in the sample barrel, a fixed plate and an outer toothed rotating plate are arranged in the sample barrel respectively, a plurality of sample balls are arranged above the outer toothed rotating plate in the sample barrel, a sample pouring hopper is arranged at the upper position on one side of the sample barrel, a motor two is arranged on the outer circle of one side of the sample barrel, an output end of the motor two is connected with a driving gear, three-way pipes are arranged below the two groups of sample barrels, a layered bottom bin is arranged below the sample barrel, a support frame is arranged between the layered bottom bin and each group of sample barrels, and a sample collection box is arranged in the layered bottom bin.

[0006] Preferably, a motor box one is arranged above the sample barrel, the mounting end of the motor one is correspondingly mounted in the inner cavity of the motor box one, an axle hole one is formed in the sample barrel, and the outer circle of the connecting rod is correspondingly mounted in the axle hole one.

[0007] Preferably, the mounting end of the stirring paddle is mounted corresponding to the outer ring of one end of the connecting rod, the inner wall of the sample barrel is provided with two sets of limiting mounting rings, the outer periphery of the fixed plate and the outer toothed rotating plate is mutually attached to the outer ring of the sample barrel, and the mutually faraway side of the fixed plate and the outer toothed rotating plate is closely attached to the mutually close side of the two sets of limiting mounting rings.

[0008] Preferably, a limiting hole is formed at the middle position of the fixed plate, a limiting shaft is arranged below the outer toothed rotating plate, the limiting shaft is mounted corresponding to the limiting hole, and two sets of sample dropping holes are formed on the fixed plate and the outer toothed rotating plate.

[0009] Preferably, a notch is formed at one side of the sample barrel, a gear compartment is arranged at the notch position of the outer side of the sample barrel, a driving gear is mounted corresponding to the inner cavity of the gear compartment, an axle hole two is formed above the gear compartment, the output end of the second motor passes through the axle hole two and is mounted corresponding to one side of the driving gear, the driving gear is mutually engaged with the outer toothed rotating plate, a motor box two is arranged above the gear compartment, and the mounting end of the second motor is mounted corresponding to the inner cavity of the motor box two.

[0010] Preferably, the upper side of the supporting frame is mounted corresponding to the lower outer ring of the sample barrel, a pipe hole is formed on the layered bottom compartment, and the two ends of the three-way pipe are mounted corresponding to the lower ends of the two sets of sample barrels and corresponding to the pipe hole.

[0011] Preferably, the sample collecting box is mounted corresponding to the inner cavity of the layered bottom compartment, and a pull handle is arranged at one side of the sample collecting box.

[0012] Compared with the prior art, the utility model has the advantages of the following beneficial technical effects:

[0013] The utility model discloses a whole simple structure can be stratified random sampling collection to sample through the setting of random sampling mechanism and layered bottom compartment, and the sample ball in the sample barrel can be stirred and rolled through motor one, connecting rod and stirring paddle in random sampling mechanism, and the setting of motor two, driving gear, outer toothed rotating plate and fixed plate can make the sample ball drop through sample dropping hole one by one in the rolling state at random, thereby achieving the purpose of random sampling, and the whole automatic operation through mechanical structure reduces the error caused by artificial sampling interference of external factors. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the whole structure schematic view of the utility model;

[0015] Fig. 2 It is the partial area sectional view of the utility model;

[0016] Fig. 3The partial structure explosion drawing of the random sampling mechanism in the utility model.

[0017] Reference signs: 1, random sampling mechanism; 11, sample barrel; 12, motor one; 13, connecting rod; 14, stirring paddle; 15, fixed plate; 16, outer tooth rotating plate; 17, sample throwing hopper; 18, motor two; 19, driving gear; 110, three-way conduit; 2, layered bottom bin; 3, support frame; 4, sample collection box; 5, motor box one; 6, sample ball; 7, limiting installation ring; 8, limiting hole; 9, limiting shaft; 10, sample dropping hole; 20, gear bin; 21, motor box two; 22, pulling handle. DETAILED DESCRIPTION

[0018] The technical scheme of the utility model is further explained below in combination with the drawings and specific embodiments.

[0019] EMBODIMENT

[0020] As Figs. 1-3As shown, the utility model provides a kind of application statistics is used to stratified sampling device, including random sampling mechanism 1, random sampling mechanism 1 includes two groups of sample barrels 11, the upper portion of each sample barrel 11 is provided with motor one 12, the upper portion of sample barrel 11 is provided with motor box one 5, the mounting end of motor box one 5 is fixedly connected with the upper portion of sample barrel 11, the mounting end of motor one 12 is installed with the inner cavity of motor box one 5, the mounting end of motor one 12 is fixedly connected with the inner cavity of motor box one 5, the setting of motor box one 5 can protect motor one 12, the output end of motor one 12 is connected with connecting rod 13, the output end of motor one 12 is fixedly connected with one end of connecting rod 13, shaft hole one is opened on sample barrel 11, the outer ring of connecting rod 13 is installed with shaft hole one, connecting rod 13 is rotatably connected with shaft hole one, one end of connecting rod 13 passes through shaft hole one and is located inside sample barrel 11, the outer ring of one end of connecting rod 13, which is away from motor one 12, is provided with multiple groups of stirring paddles 14 in sample barrel 11, the mounting end of stirring paddle 14 is installed with the outer ring of one end of connecting rod 13, the mounting end of stirring paddle 14 is fixedly connected with connecting rod 13, the inner portion of sample barrel 11 is provided with fixed plate 15 and outer tooth rotating plate 16 respectively, the outer periphery of fixed plate 15 and outer tooth rotating plate 16 is mutually attached with the outer ring of sample barrel 11, limit hole 8 is opened on fixed plate 15 at intermediate position, limit shaft 9 is provided below outer tooth rotating plate 16, one end of limit shaft 9 is fixedly connected with outer tooth rotating plate 16, limit shaft 9 is installed with limit hole 8, limit shaft 9 is rotatably connected with limit hole 8, the setting of limit shaft 9 and limit hole 8 can make outer tooth rotating plate 16 stably installed above fixed plate 15, the inner wall of sample barrel 11 is provided with two groups of limit mounting rings 7, the outer ring of limit mounting ring 7 is fixedly connected with the inner wall of random sampling mechanism 1, the side, which is mutually away from each other of fixed plate 15 and outer tooth rotating plate 16, is closely attached with the side, which is mutually close of two groups of limit mounting rings 7, the setting of limit mounting ring 7 can limit fixed plate 15 and outer tooth rotating plate 16, so that fixed plate 15 and outer tooth rotating plate 16 are more stable when being in installation state, and simultaneously, outer tooth rotating plate 16 can stably rotate, multiple groups of sample balls 6 are provided above outer tooth rotating plate 16 in sample barrel 11, multiple groups of sample balls 6 can better randomly sample in sample barrel 11, two groups of sample dropping holes 10 are opened on fixed plate 15 and outer tooth rotating plate 16, the radius of sample dropping hole 10 is greater than the radius of sample ball 6, when two groups of sample dropping holes 10 on fixed plate 15 and outer tooth rotating plate 16 rotate to same position, one group of sample balls 6 can drop into the lower portion of sample barrel 11 through sample dropping hole 10, so as to achieve the purpose of random sampling;

[0021] A sample feeding hopper 17 is provided at the upper position on one side of the sample barrel 11, and the sample feeding hopper 17 is fixedly connected to the sample barrel 11. The setting of the sample feeding hopper 17 is convenient for the operator to put the same number of sample balls 6 into the two groups of sample barrels 11 according to statistical needs. A motor 2 18 is provided on one side of the outer ring of the sample barrel 11. The output end of the motor 2 18 is connected to a driving gear 19. A notch is provided on one side of the sample barrel 11. A gear bin 20 is provided on the outside of the sample barrel 11 at the position of the notch. The mounting end of the gear bin 20 is fixedly connected to the outside of the sample barrel 11, and the driving gear 19 is installed corresponding to the inner cavity of the gear bin 20. The driving gear 19 is rotatably connected to the gear bin 20. The setting of the gear bin 20 can protect the driving gear 19 and make the driving gear 1 9 rotates stably, a shaft hole 2 is opened above the gear warehouse 20, the output end of the motor 2 18 passes through the shaft hole 2 and is installed corresponding to one side of the driving gear 19, the output end of the motor 2 18 is fixedly connected to the driving gear 19, the output end of the motor 2 18 is rotatably connected to the shaft hole 2, the driving gear 19 and the outer gear rotating plate 16 are meshed with each other, and when the driving gear 19 rotates, the outer gear rotating plate 16 can be driven to rotate, so that the multiple groups of sample balls 6 in the sample barrel 11 can be better randomly sampled, and a motor box 21 is provided above the gear warehouse 20, the mounting end of the motor box 21 is fixedly connected to the gear warehouse 20, the mounting end of the motor 2 18 is installed correspondingly to the inner cavity of the motor box 21, and the mounting end of the motor 2 18 is fixedly connected to the inner cavity of the motor box 21. The setting of the second 21 can protect the motor 2 18. A three-way guide tube 110 is provided below the two groups of sample barrels 11. A layered bottom bin 2 is provided below the sample barrel 11. A pipe hole is provided on the layered bottom bin 2. The two ends of the three-way guide tube 110 are respectively installed corresponding to the lower end of the two groups of sample barrels 11. The two ends of the three-way guide tube 110 are respectively fixedly connected to the lower end of the two groups of sample barrels 11. The other end of the three-way guide tube 110 is installed corresponding to the pipe hole. The other end of the three-way guide tube 110 is fixedly connected to the pipe hole. The setting of the three-way guide tube 110 can guide and collect the sample balls 6 that fall through the sample drop holes 10 in the two groups of sample barrels 11, so that the samples can be better viewed. A support frame is provided between the layered bottom bin 2 and each group of sample barrels 11. 3. The upper part of the support frame 3 is installed corresponding to the lower outer ring of the sample barrel 11, and the mounting end of the support frame 3 is fixedly connected to the upper part of the layered bottom bin 2. The upper part of the support frame 3 is fixedly connected to the lower outer ring of the sample barrel 11. The setting of the support frame 3 can stably support the two groups of sample barrels 11, so that the sampling operation can be better performed. A sample collection box 4 is provided in the layered bottom bin 2, and the sample collection box 4 is installed corresponding to the inner cavity of the layered bottom bin 2. The sample collection box 4 is slidably connected to the layered bottom bin 2. The setting of the sample collection box 4 can centrally collect the sample balls 6 guided by the sample barrel 11, so that the operator can better view the sample. A pull-out handle 22 is provided on one side of the sample collection box 4, and the pull-out handle 22 is fixedly connected to the sample collection box 4.The setting of the pull handle 22 facilitates the operator to pull out the sample collection box 4, the whole device is simple in structure, the sample can be collected by the random sampling mechanism 1 and the layered bottom bin 2, the motor 12, the connecting rod 13 and the stirring paddle 14 in the random sampling mechanism 1 can stir and roll the sample balls 6 in the sample barrel 11, the motor 18, the driving gear 19, the outer tooth rotating plate 16 and the fixed plate 15 can make the sample balls 6 randomly fall through the sample dropping holes 10 one by one in the rolling state, so that the random sampling purpose is achieved, the whole device is automatically operated by the mechanical structure, and the error caused by the manual sampling interference of external factors is avoided.

[0022] In the embodiment, the operator sets the number according to the required statistical situation, then corresponds the number to the sample balls 6 of different colors, then respectively pours the sample balls 6 into the two groups of sample barrels 11 through the sample pouring hopper 17, the sample balls 6 are above the outer tooth rotating plate 16 in the sample barrel 11, then the operator starts the motor 12 and the motor 18, the motor 12 drives the stirring paddle 14 to stir the sample balls 6 above the outer tooth rotating plate 16 through the connecting rod 13, the motor 18 drives the driving gear 19 to rotate, the driving gear 19 rotates to drive the outer tooth rotating plate 16 to rotate through the meshing with the outer tooth rotating plate 16, the rotation of the outer tooth rotating plate 16 makes the sample dropping holes 10 on the outer tooth rotating plate 16 gradually correspond to the sample dropping holes 10 on the fixed plate 15, when the sample dropping holes 10 on the fixed plate 15 and the outer tooth rotating plate 16 correspond to each other, at this time, a group of sample balls 6 naturally fall through the sample dropping holes 10, the sample balls 6 fall through the three-way conduit 110 to fall into the sample collection box 4 for centralized collection, so that the random sampling work of the sample balls 6 is completed.

[0023] The above specific embodiments are only preferred embodiments of the present application, based on the technical scheme of the present application and the related inspiration of the above embodiments, those skilled in the art can make various alternative improvements and combinations on the above specific embodiments.

Claims

1. A stratified sampling device for statistical applications, comprising a random sampling mechanism (1), characterised in that: The random sampling mechanism (1) includes two groups of sample barrels (11), each group of the sample barrels (11) is provided with a motor one (12) above, the output end of the motor one (12) is connected with a connecting rod (13), the outer circle of the one end of the connecting rod (13) away from the motor one (12) is provided with a plurality of stirring paddles (14) in the sample barrel (11), the inner part of the sample barrel (11) is respectively provided with a fixed plate (15) and an external tooth rotating plate (16), a plurality of sample balls (6) are arranged above the external tooth rotating plate (16) in the sample barrel (11), a sample bucket (17) is arranged at the upper position on one side of the sample barrel (11), a motor two (18) is arranged on the outer circle of the sample barrel (11) on one side, the output end of the motor two (18) is connected with a driving gear (19), three-way pipes (110) are arranged below the two groups of sample barrels (11), a layered bottom warehouse (2) is arranged below the sample barrel (11), a support frame (3) is arranged between the layered bottom warehouse (2) and each group of sample barrels (11), and a sample collection box (4) is arranged in the layered bottom warehouse (2).

2. The stratified sampling device for application of statistics according to claim 1, characterized in that, The upper part of the sample barrel (11) is provided with a motor box one (5), the mounting end of the motor one (12) is correspondingly mounted in the inner cavity of the motor box one (5), and the shaft hole one is formed in the sample barrel (11).

3. The stratified sampling device for application of statistics according to claim 1, wherein, The mounting end of the stirring paddle (14) is correspondingly mounted with the outer circle of one end of the connecting rod (13), the inner wall of the sample barrel (11) is provided with two groups of limiting mounting rings (7), the outer periphery of the fixed plate (15) and the external tooth rotating plate (16) is mutually attached to the outer circle of the sample barrel (11), and the mutually faraway sides of the fixed plate (15) and the external tooth rotating plate (16) are tightly attached to the mutually close sides of the two groups of limiting mounting rings (7).

4. The stratified sampling device for application of statistics according to claim 1, wherein, The limiting hole (8) is formed in the middle position of the fixed plate (15), the limiting shaft (9) is arranged below the external tooth rotating plate (16), the limiting shaft (9) is correspondingly mounted with the limiting hole (8), and the two groups of sample dropping holes (10) are formed in the fixed plate (15) and the external tooth rotating plate (16), the radius of the sample dropping hole (10) is greater than the radius of the sample ball (6).

5. The stratified sampling device for application of statistics according to claim 1, wherein, The side of the sample barrel (11) is provided with a notch, the outer side of the sample barrel (11) is provided with a gear warehouse (20) at the notch position, the driving gear (19) is correspondingly mounted in the inner cavity of the gear warehouse (20), the shaft hole two is formed in the upper part of the gear warehouse (20), the output end of the motor two (18) passes through the shaft hole two and is correspondingly mounted with one side of the driving gear (19), the driving gear (19) is meshed with the external tooth rotating plate (16), the upper part of the gear warehouse (20) is provided with a motor box two (21), and the mounting end of the motor two (18) is correspondingly mounted in the inner cavity of the motor box two (21).

6. The stratified sampling device for application of statistics according to claim 1, characterized by The upper part of the support frame (3) is installed in correspondence with the lower outer ring of the sample barrel (11), a pipe hole is formed on the layered bottom bin (2), and the two ends of the three-way pipe (110) are respectively installed in correspondence with the lower end of the two groups of sample barrels (11), and the other end of the three-way pipe (110) is installed in correspondence with the pipe hole.

7. The stratified sampling device for application of statistics according to claim 1, characterized by The sample collection box (4) is installed in correspondence with the inner cavity of the layered bottom bin (2), and one side of the sample collection box (4) is provided with a pull handle (22).

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