A measuring device and method for granular products

Abstract

The present invention discloses a metering device and method for granular products, including a connecting cover, a medicine-applying shell, a metering plate and a medicine-dropping plate. A cavity is formed in the medicine-applying shell, a medicine-applying plate is formed on one side of the cavity, and the metering plate can rotate between the medicine-applying plate and the medicine-dropping plate under the action of an external force; at least one medicine-applying hole is provided on the medicine-applying plate, and at least one medicine-dropping hole is provided on the medicine-dropping plate, and the medicine-applying hole and the medicine-dropping hole are arranged in a staggered manner in the vertical direction; at least one group of metering hole rings with multiple metering holes is provided on the metering plate, and the metering holes can completely pass through the medicine-applying holes and the medicine-dropping holes in sequence during the rotation of the metering plate. The present invention directly combines the three structures of the connecting cover, the metering plate and the medicine-dropping plate into one, and the inner cavity of the medicine-applying shell between the connecting cover and the metering plate is entirely used to accommodate the granular preparation, and there is no corner structure around the medicine-applying hole at the bottom of the medicine-applying shell, thereby avoiding the accumulation and blockage of the granular preparation inside the medicine-applying shell.

Description

Technical Field

[0001] The present invention relates to the technical field of particle product metering, and in particular to a particle product metering device and method. Background Art

[0002] Automatic preparation of Chinese medicine granules is an important part of the dispensing process in modern Chinese medicine pharmacies. In the automatic preparation process, automatic metering and dropping of medicine is the core process.

[0003] In the prior art, for example, the invention patent with application number 201910921051.0 discloses a porous metering device for granular preparations, which is mainly composed of a connecting cover, a positioning medicine-distributing disk, a metering disk and a bottom cover. The granular preparation entering from the connecting cover is divided and dropped into the metering holes of the metering disk by the positioning medicine-distributing disk, and discharged from the medicine-discharging holes on the bottom cover during the rotation of the metering disk.

[0004] However, the positioning medicine-dispensing disk in the metering device of the prior art occupies most of the internal space of the metering device, so that the granular preparations that the metering device can accommodate are greatly limited, and during the long-term medicine dropping process, the granular preparations are easily accumulated and blocked at the corners of the positioning medicine-dispensing disk, thereby affecting the accuracy of medicine dropping, or even making it impossible to drop medicine normally. Secondly, the overall structure of the metering device is compact and complex, and the connection or fixation between the various components is relatively complex, which increases the operational failure rate of the metering device, and the practicality of the metering device product produced by it is relatively weak. Summary of the invention

[0005] The object of the present invention is to provide a metering device and method for granular products, so as to solve the technical problems in the prior art that the metering device has a complex structure, resulting in a small content and a high failure rate.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0007] In a first aspect, the present invention provides a metering device for granular products, comprising a connecting cover, a medicine-loading shell, a metering plate and a medicine-dropping plate connected in sequence according to the order of dropping medicines, a cavity for carrying granular preparations to be metered and dropped is formed in the medicine-loading shell, a medicine-loading plate is formed on one side of the cavity close to the metering plate, and the medicine-loading plate, the metering plate and the medicine-dropping plate are fitted together, and the metering plate can rotate between the medicine-loading plate and the medicine-dropping plate under the action of an external force; wherein,

[0008] At least one medicine loading hole is arranged on the medicine loading tray, and at least one medicine dropping hole is arranged on the medicine dropping tray, and the medicine loading hole and the medicine dropping hole are staggered in the vertical direction. At least one group of metering hole rings with multiple metering holes is arranged on the metering tray, and the metering holes can completely pass through the medicine loading hole and the medicine dropping hole in sequence during the rotation of the metering tray, so as to realize automatic metering of medicine dropping with the capacity of a single metering hole as the metering unit.

[0009] Preferably, the medicine loading tray is provided with two medicine loading holes, and the medicine dropping tray is provided with two medicine dropping holes.

[0010] Preferably, the number of the metering hole rings is at least 2 groups, and the number of metering holes in a single circle of the metering hole ring is 7-14.

[0011] Preferably, a limiting assembly for restricting the deviation movement of the medicine loading tray, the metering tray and the medicine dropping tray relative to each other is formed at the connection between the medicine loading tray, the metering tray and the medicine dropping tray.

[0012] Preferably, the limiting assembly includes a limiting protrusion sleeve formed in the center of the upper medicine plate, an annular protrusion column formed in the center of the medicine drop plate, and an annular hollow column formed in the center of the metering plate, the annular hollow column is fixed in the limiting protrusion sleeve, and the annular hollow column is movably arranged between the annular protrusion column and the limiting protrusion sleeve.

[0013] Preferably, the limiting raised sleeve comprises a raised sleeve outer edge integrally connected to the body of the upper medicine tray, and a raised sleeve inner edge formed inside the raised sleeve outer edge, a raised sleeve annular groove is formed between the raised sleeve outer edge and the raised sleeve inner edge, a raised sleeve hollow groove is formed inside the raised sleeve inner edge, and at least one key groove is provided on the outer wall surface of the raised sleeve inner edge;

[0014] The annular raised column comprises a raised column outer edge and a raised column inner body arranged in the raised column outer edge, a raised column slot is formed between the raised column outer edge and the raised column inner body, and at least one raised key is arranged on the inner wall surface of the raised column outer edge;

[0015] Among them, the inner body of the raised column is arranged in the hollow groove of the raised sleeve, the inner edge of the raised sleeve is arranged in the raised column slot, the outer edge of the raised column and the annular hollow column are both arranged in the annular groove of the raised sleeve; and the outer edge of the raised column and the inner edge of the raised sleeve are fixed by a combined connection between the raised key and the key slot, and the annular hollow column is located between the outer edge of the raised column and the outer edge of the raised sleeve and can rotate.

[0016] Preferably, the limiting protrusion sleeve also includes a first screw hole arranged on the sleeve body on the side of the hollow groove of the protrusion sleeve close to the connecting cover, and a second screw hole located in the same vertical direction as the first screw hole is arranged at the center of the inner body of the protrusion column. The medicine loading tray and the medicine dropping tray are fixedly connected by screws that pass through the first screw hole, the hollow groove of the protrusion sleeve and the second screw hole in sequence to limit the vertical movement and circumferential relative rotation of the medicine loading tray and the medicine dropping tray.

[0017] Preferably, the number of the keyways is 2-4; the number of the raised keys is 2-4.

[0018] Preferably, the side wall of the connecting cover and the side wall of the medicine applying housing are connected by screws.

[0019] Preferably, a toothed structure is provided on the outer surface of the metering disc.

[0020] Preferably, the medicine loading shell and the medicine loading tray are an integrated structure.

[0021] In another aspect, the present invention further provides a metering method based on the above metering device, comprising the following steps:

[0022] Step 100, connecting the toothed structure on the outside of the metering disk to a control system via a driving device, and setting the capacity parameters of a single metering hole in the control system;

[0023] Step 200, taking an average value through multiple experiments, obtaining the angle-number relationship between the rotation angle of the metering disk moving from the starting position and the number of metering holes passing through different drug dropping holes, thereby obtaining the angle-drug dropping amount relationship between the rotation angle and the drug dropping amount of different drug dropping holes;

[0024] Step 300: Based on the angle-drug drop amount relationship, the target drug drop amount of the designated drug drop hole is input into the control system to obtain the target rotation angle of the metering disk, and then the driving device is controlled to rotate the metering disk to the target rotation angle.

[0025] Preferably, a method for improving measurement accuracy is also included, comprising the following steps:

[0026] Calculate the total angle value N of a single metering hole from the beginning of overlapping with the drug drop hole to the complete overlap, and record the starting angle value of the metering hole overlapping with the drug drop hole as 0;

[0027] Conducting a test on a single metering hole at a designated drug drop hole at an angle between [0-N] to obtain an actual drug drop amount of the granular product when the metering hole is rotated at a test angle value P;

[0028] In the [0-N] angle range, the ideal drug drop amount of the drug drop hole is the product of the capacity parameter of a single metering hole and P / N. The actual drug drop amount is compared with the ideal drug drop amount to obtain the difference between the actual drug drop amount and the ideal drug drop amount under different test angle values, and then the relationship between the test angle value P and the difference is obtained. According to the relationship between the test angle value P and the difference, the angle-drug drop amount relationship is fed back and corrected;

[0029] When the target drug drop amount is not the sum of the capacities of the integer metering holes, the target rotation angle of the metering disk is corrected and calculated based on the corrected angle-drug drop amount relationship.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The present invention directly combines the three structures of a connecting cover, a metering plate and a medicine dropping plate into one, and uses the inner cavity of the medicine applying shell between the connecting cover and the metering plate to accommodate the granular preparation. There is no corner structure around the medicine applying hole at the bottom of the medicine applying shell (medicine applying plate), thereby avoiding the accumulation and blockage of the granular preparation inside the medicine applying shell.

[0032] The present invention simplifies the structural composition of the existing metering device and achieves the same or even more optimized effect of metering medicine dropping. The simplified structure reduces the operational failure rate of the metering device, and has high practicality and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0034] Figure 1 A schematic diagram of the three-dimensional structure of the metering device provided by the present invention;

[0035] Figure 2 for Figure 1 Axle side schematic diagram;

[0036] Figure 3 It is a schematic diagram of the three-dimensional structure of the medicine loading shell of the present invention;

[0037] Figure 4 for Figure 3 A schematic diagram of the three-dimensional structure of the medicine upper shell from another perspective;

[0038] Figure 5 for Figure 3 Axle side schematic diagram;

[0039] Figure 6 It is a schematic diagram of the three-dimensional structure of the metering disk of the present invention;

[0040] Figure 7 for Figure 6 Axle side schematic diagram;

[0041] Figure 8 It is a schematic diagram of the three-dimensional structure of the medicine dropping tray of the present invention.

[0042] The numbers in the figure represent the following:

[0043] 10-medicine feeding shell; 20-metering plate; 30-medicine drop plate; 40-connecting cover; 50-limiting assembly; 11-containing cavity; 12-medicine feeding plate; 13-medicine feeding hole; 21-metering hole; 22-metering hole ring; 23-toothed structure; 31-medicine drop hole; 51-limiting protrusion sleeve; 52-annular protrusion column; 53-annular hollow column; 54-annular groove of protrusion sleeve; 55-hollow groove of protrusion sleeve; 56-inner edge of protrusion sleeve; 57-first screw hole; 58-second screw hole; 59-outer edge of protrusion sleeve; 521-outer edge of protrusion column; 522-inner body of protrusion column; 523-protrusion column slot; 524-protrusion key; 525-key slot. DETAILED DESCRIPTION

[0044] 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.

[0045] like Figure 1 As shown, the present invention provides a metering device for granular products, comprising a connecting cover 40, a medicine-loading shell 10, a metering plate 20 and a medicine-dropping plate 30 which are connected in sequence according to the order of dropping medicines, a cavity 11 for carrying the granular preparation to be metered and dropped is formed in the medicine-loading shell 10, a medicine-loading plate 12 is formed on one side of the cavity 11 close to the metering plate 20, and the medicine-loading plate 12, the metering plate 20 and the medicine-dropping plate 30 are fitted together, and the metering plate 20 can rotate between the medicine-loading plate 12 and the medicine-dropping plate 30 under the action of an external force; wherein,

[0046] At least one medicine loading hole 13 is provided on the medicine loading plate 12, and at least one medicine dropping hole 31 is provided on the medicine dropping plate 3, and the medicine loading hole 13 and the medicine dropping hole 31 are staggered in the vertical direction, and at least one group of metering hole rings 22 with multiple metering holes 21 is provided on the metering plate 20, and the metering holes 21 can completely pass through the medicine loading hole 13 and the medicine dropping hole 31 in sequence during the rotation of the metering plate 20, so as to realize automatic metering of medicine dropping with the capacity of a single metering hole 21 as the metering unit.

[0047] The granular preparation enters the cavity 11 of the medicine feeding shell 10 from the connecting cover 40 and fills the cavity 11 , so that the granular preparation can completely fill the medicine feeding hole 13 in real time and is ready to enter the metering hole 21 at any time.

[0048] The metering disk 20 is rotated under the action of external force, and the metering holes 21 are overlapped and staggered with the medicine feeding holes 13 in an alternate cycle. The granular preparation circulates and fills the metering holes 21 under the action of gravity, and the medicine is dropped when the metering holes 21 overlap with the medicine dropping holes 31. The amount of granular preparation dropped from the medicine dropping holes 31 is calculated based on the capacity of a single metering hole 21 as the measurement unit.

[0049] In this embodiment, the three structures of the connecting cover, the metering plate and the medicine drop plate are directly combined into one, and the inner cavity of the medicine loading shell between the connecting cover and the metering plate is entirely used to accommodate the granular preparation. There is no corner structure around the medicine loading hole at the bottom of the medicine loading shell (medicine loading plate), thereby avoiding the accumulation and blockage of the granular preparation inside the medicine loading shell.

[0050] The present invention simplifies the structural composition of the existing metering device and achieves the same or even more optimized effect of metering medicine dropping. The simplified structure reduces the operational failure rate of the metering device, and has high practicality and low cost.

[0051] In addition to the advantage of simplified structure, this embodiment can also improve the accuracy of metering and dropping medicine on the basis of simplified structure. The specific implementation is as follows:

[0052] As a preferred embodiment, two medicine holes 13 are provided on the upper medicine tray 12, and two medicine dropping holes 31 are provided on the medicine dropping tray 30, and the two medicine holes 13 are symmetrically distributed on the center of the upper medicine tray 12 (that is, located on the same diameter line on the upper medicine tray 12). Similarly, the two medicine dropping holes 31 are symmetrically distributed on the center of the medicine dropping tray 30 (that is, located on the same diameter line on the medicine dropping tray 30).

[0053] The number of metering hole rings 22 is at least 2 groups, and the number of metering holes 21 in a single circle of metering hole rings 22 is 7-14, which is much larger than the number of drug feeding holes 13 and drug dropping holes 31. The main purpose is to ensure that each metering hole 21 has a certain interval between each drug feeding action and drug dropping action, so as to avoid the situation where the metering hole 21 fails to completely feed the drug or completely drop the drug when the metering disk rotates at a high speed.

[0054] The drug dropping efficiency of each drug dropping hole 31 is inevitably related to the rotation speed of the metering disk 20. A high rotation speed means that more metering holes 21 pass through the drug dropping holes 31 per unit time, which means that a large amount of medicine drops from the drug dropping holes 31 per unit time. However, if the rotation speed of the metering disk 20 is too high, the overlapping time between the metering holes 21 and the drug dropping holes 31 will be very short, and the granular preparation in the metering holes 21 cannot be completely and stably dropped into the drug dropping holes 31, which also affects the metering accuracy of the amount of medicine dropped from the drug dropping holes 31. Therefore, the drug dropping efficiency of a single drug dropping hole 31 of the existing metering device is not high, and the rotation speed of the metering disk 20 is greatly limited. If the drug dropping efficiency is improved, the metering accuracy will inevitably be reduced, and in the process of continuous drug dropping by the metering device, errors will gradually accumulate, resulting in a large difference between the final amount of medicine dropped and the target value.

[0055] In particular, when the metering hole 21 and the drug dropping hole 31 are of similar size, the above error will be more obvious.

[0056] Taking the prior art 201910921051.0 invention patent disclosed a porous metering device for granular preparations as a comparison, the number of metering holes and drug dropping holes is the same, that is, after the metering holes are filled with granular preparations, the drugs are dropped immediately every time the unit spacing of an adjacent drug dropping hole is rotated, and each metering hole performs the drug loading and drug dropping actions uninterruptedly over a short distance and in a short time. In this case, there are certain requirements on the rotation speed of the metering disk. If the rotation speed of the metering disk is increased (the purpose is to improve the drug dropping efficiency of a single drug dropping hole), the interval between each drug loading and drug dropping action of the metering hole is very short, which can easily lead to incomplete drug loading and drug dropping in the metering hole, thereby reducing the metering accuracy. In this case, the final drug dropping error will gradually accumulate.

[0057] Moreover, if there are more drug drop holes, it also means that the accumulated errors will be greater. This is also the shortcoming of a larger number of drug drop holes. It can be seen that the metering device of the prior art cannot meet the requirements of improving the drug drop efficiency and ensuring the metering accuracy (reducing errors) at the same time, or even improving the metering accuracy.

[0058] In the present embodiment, fewer drug drop holes 31 and more metering holes 21 in a single circle cooperate with each other to achieve efficient drug drop (which can increase the rotation speed) of the same drug drop hole 31, and at the same time have very high metering accuracy.

[0059] In this embodiment, the number of metering holes 21 can be set relatively small to further improve the metering accuracy. When the volume of the metering holes 21 is small, more metering holes 21 can be arranged in a single metering hole ring 22.

[0060] When the number of metering holes 21 increases, the metering holes 21 can be set smaller, which also means that the size difference between the metering holes 21 and the drug drop holes 31 is larger. In this case, the metering holes 21 can pass through the drug drop holes more easily and completely, thereby further increasing the rotation speed and improving the accuracy, killing two birds with one stone.

[0061] In order to highlight the relationship and benefits between the number of metering holes 21 and the number of drug feeding holes 13 and the number of drug dropping holes 31 in this embodiment, two drug feeding holes 12 and two drug dropping holes 31 form a cross structure, the number of metering hole circles 22 is 2, and the number of metering holes in each metering hole circle 22 is 12 (such as Figure 6 ) as an example to illustrate:

[0062] After the metering hole 21 is loaded with medicine from one of the medicine loading holes 13, it needs to pass through 1 / 4 of the distance of the metering disk 20 before dropping medicine at the medicine dropping hole 31. After dropping medicine, the metering hole 21 continues to pass through 1 / 4 of the distance of the metering disk and overlaps with the medicine loading hole 13 to load medicine, and the cycle continues, that is, each metering hole 21 will drop medicine after a period of time after loading medicine, and the medicine dropped from the same medicine dropping hole 31 is dropped after multiple metering holes 21 have loaded medicine successively.

[0063] The number of metering holes 21 is much larger than the number of drug drop holes 31, and the size of metering holes 21 is also much smaller than drug drop holes 31. If the speed of metering disk 20 is increased, more metering holes 21 will pass through drug drop holes 31 per unit time, and drug drop efficiency will be higher. Since metering holes 21 are smaller than drug drop holes 31, the speed of metering disk will not affect the complete drug drop of metering holes 21. The metering device of this embodiment can simultaneously improve the drug drop efficiency and drug drop accuracy of drug drop holes 31.

[0064] A limiting assembly 50 is formed at the connection between the upper medicine tray 12, the metering tray 20 and the medicine dropping tray 30 to restrict the deviation movement between the upper medicine tray 12, the metering tray 20 and the medicine dropping tray 30. The purpose is to make the upper medicine tray 12, the metering tray 20 and the medicine dropping tray 30 form a detachable integral structure, and to make the key structures (the upper medicine tray 12, the metering tray 20 and the medicine dropping tray 30) form a limiting and connecting structure through their own structure, thereby simplifying the structural composition of the entire metering device, reducing the cost of the product, and reducing the failure rate of the product.

[0065] A preferred embodiment of the limiting assembly 50 is provided below. The limiting assembly 50 includes a limiting protrusion sleeve 51 formed at the center of the upper medicine plate 12, an annular protrusion column 52 formed at the center of the medicine drop plate 3, and an annular hollow column 53 formed at the center of the metering plate 20. The annular hollow column 53 is fixed in the limiting protrusion sleeve 51, and the annular hollow column 53 is movably arranged between the annular protrusion column 52 and the limiting protrusion sleeve 51.

[0066] The limiting assembly 50 mainly forms a matching sleeve structure and a columnar structure at the center of the upper medicine plate 12, the metering plate 20 and the medicine drop plate 30, and enables the metering plate 20 to rotate at its center, and limits the movement of the upper medicine plate 12, the metering plate 20 and the medicine drop plate 30 in the vertical and horizontal directions, and limits the relative rotation of the upper medicine plate 12 and the medicine drop plate 30, so as to realize the metering and medicine drop process more smoothly.

[0067] The limiting raised sleeve 51 includes a raised sleeve outer edge 59 integrally connected to the body of the upper medicine plate 12, and a raised sleeve inner edge 56 formed in the raised sleeve outer edge 59, a raised sleeve annular groove 54 is formed between the raised sleeve outer edge 59 and the raised sleeve inner edge 56, a raised sleeve hollow groove 55 is formed on the inner side of the raised sleeve inner edge 56, and at least one key groove 525 is provided on the outer wall surface of the raised sleeve inner edge 56; the annular raised column 52 includes a protruding column outer edge 521, and a protruding column inner body 522 disposed in the protruding column outer edge 521, and a protruding column slot 523 is formed between the protruding column outer edge 521 and the protruding column inner body 522, and at least one protruding key 524 is disposed on the inner wall surface of the protruding column outer edge 521; wherein the protruding column inner body 522 is disposed in the hollow groove of the protruding sleeve, and the protruding sleeve inner edge 56 is disposed in the protruding column slot 523 The outer edge 521 of the protruding column and the annular hollow column 53 are both arranged in the annular groove 54 of the protruding sleeve; and the outer edge 521 of the protruding column and the inner edge 56 of the protruding sleeve are fixed by the combined connection of the protruding key 524 and the key groove 525 (the key groove 525 is vertically arranged along the inner edge 56 of the protruding sleeve, the protruding key 524 is downwardly arranged along the outer edge 521 of the protruding column, and the limiting protruding sleeve 51 and the annular protruding column 52 are fixed by the protruding key 524 and the key groove 525 The locking members 525 and 524 are directly combined into a whole, and the keyway 525 and the raised key 524 arranged vertically downward constrain the relative rotation of the limiting raised sleeve 51 and the annular raised column 52, and relative movement can only occur in the vertical direction). The annular hollow column 53 is located between the outer edge 521 of the raised column and the outer edge 59 of the raised sleeve and can rotate (since there is no constraining structure between the annular hollow column 53 and the outer edge 521 of the raised column and the outer edge 59 of the raised sleeve, they can rotate).

[0068] In the case of normal drug dropping, due to the friction between the key slot 525 and the raised key 524, the limiting protrusion sleeve 51 and the annular protrusion column 52 are generally difficult to move in the up and down directions. In order to further fix the relative movement of the limiting protrusion sleeve 51 and the annular protrusion column 52 in the vertical direction (drug dropping direction), this embodiment further provides a fixing structure or fixing method of the limiting protrusion sleeve 51 and the annular protrusion column 52 in the vertical direction, which is as follows:

[0069] The limiting protrusion sleeve 51 also includes a first screw hole 57 arranged on the sleeve body on the side of the hollow groove 55 of the protrusion sleeve close to the connecting cover 40, and a second screw hole 58 is arranged at the center of the inner body 522 of the protrusion column in the same vertical direction as the first screw hole 57. The upper medicine tray 12 and the medicine dropping tray 3 are fixedly connected by screws that pass through the first screw hole 57, the hollow groove 55 of the protrusion sleeve and the second screw hole 58 in sequence to limit the vertical movement and circumferential relative rotation of the upper medicine tray 12 and the medicine dropping tray 30.

[0070] The number of the key slots 525 is 2-4; the number of the raised keys 524 is 2-4, and in this embodiment, the number is preferably 3, and the 3 key slots 525 and the 3 raised keys 524 are evenly distributed.

[0071] The side wall of the connecting cover 40 and the side wall of the medicine loading housing 10 are connected by screws or other fasteners.

[0072] A toothed structure 23 is provided on the outer surface of the metering disk 20 to facilitate docking with an external driving device and achieve continuous rotation under the power of the driving device.

[0073] The medicine loading shell 10 and the medicine loading plate 12 are an integrated structure.

[0074] Although this embodiment seems to only delete part of the structure and improve the number and size relationship between the metering holes and the drug feeding holes and drug dropping holes, it also achieves the purpose of simplifying the structure (reducing costs), improving drug dropping efficiency and improving metering accuracy.

[0075] The present invention further provides an application method (metering method) of the above-mentioned metering device, comprising the following steps:

[0076] Step 100, connecting the toothed structure on the outside of the metering disk to a control system via a driving device, and setting the capacity parameters of a single metering hole in the control system;

[0077] Step 200, taking an average value through multiple experiments, obtaining the angle-number relationship between the rotation angle of the metering disk moving from the starting position and the number of metering holes passing through different drug dropping holes, thereby obtaining the angle-drug dropping amount relationship between the rotation angle and the drug dropping amount of different drug dropping holes;

[0078] Step 300: Based on the angle-drug drop amount relationship, the target drug drop amount of the designated drug drop hole is input into the control system to obtain the target rotation angle of the metering disk, and then the driving device is controlled to rotate the metering disk to the target rotation angle.

[0079] Among them, since there is a certain distance between adjacent metering holes, the angle values ​​in the angle-hole number relationship and the angle-drop amount relationship are essentially a collection of multiple interval values.

[0080] As the granular preparation falls under the action of gravity from the time when the metering hole and the drug drop hole begin to overlap to the time when they completely overlap, and due to the physical properties of the granular preparation itself (size, humidity, mutual friction, etc.), and its interaction with the hole wall of the metering hole and the drug drop plate, the granular preparation in the metering hole will form different slope surfaces during the gradual drug drop process. Therefore, in practice, when the rotation angle cannot make the metering hole completely overlap with the drug drop hole, the amount of drug dropped cannot be calculated as the percentage of overlap between the metering hole and the drug drop hole (ideal value). Since the amount of granular preparation on the slope surface is small, the actual error is small and can generally be ignored.

[0081] Therefore, in order to further improve the measurement accuracy, a method for improving measurement accuracy is also provided, comprising the following steps:

[0082] Calculate the total angle value N of a single metering hole from the beginning of overlapping with the drug drop hole to the complete overlap, and record the starting angle value of the metering hole overlapping with the drug drop hole as 0;

[0083] Conducting a test on a single metering hole at a designated drug drop hole at an angle between [0-N] to obtain an actual drug drop amount of the granular product when the metering hole is rotated at a test angle value P;

[0084] In the [0-N] angle range, the ideal drug drop amount of the drug drop hole is the product of the capacity parameter of a single metering hole and P / N. The actual drug drop amount is compared with the ideal drug drop amount to obtain the difference between the actual drug drop amount and the ideal drug drop amount under different test angle values, and then the relationship between the test angle value P and the difference is obtained. According to the relationship between the test angle value P and the difference, the angle-drug drop amount relationship is fed back and corrected;

[0085] When the target drug drop amount is not the sum of the capacities of the integer metering holes, the target rotation angle of the metering disk is corrected and calculated based on the corrected angle-drug drop amount relationship.

[0086] This embodiment uses multiple experiments to obtain data from the entire drug dropping process from the beginning of overlap to the complete overlap of the metering hole and the drug dropping hole, and then obtains the relationship between the overlapping angle and the error (the amount of medicine on the slope surface), and then makes a reverse correction to obtain more accurate data and drug dropping accuracy.

[0087] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A metering device for granular products, characterized in that: The invention comprises a connection cover (40), a medicine loading shell (10), a metering disk (20) and a medicine dropping disk (30) which are connected in sequence according to the order of dropping medicines, wherein a cavity (11) for carrying a granular preparation to be metered and dropped is formed in the medicine loading shell (10), a medicine loading disk (12) is formed on a side of the cavity (11) close to the metering disk (20), and the medicine loading disk (12), the metering disk (20) and the medicine dropping disk (30) are arranged in close contact with each other, and the metering disk (20) can rotate between the medicine loading disk (12) and the medicine dropping disk (30) under the action of an external force; wherein: At least one medicine loading hole (13) is provided on the medicine loading plate (12), at least one medicine dropping hole (31) is provided on the medicine dropping plate (30), and the medicine loading hole (13) and the medicine dropping hole (31) are arranged in a staggered manner in the vertical direction, at least one group of metering hole rings (22) having a plurality of metering holes (21) is provided on the metering plate (20), and the metering holes (21) can completely pass through the medicine loading hole (13) and the medicine dropping hole (31) in sequence during the rotation of the metering plate (20), so as to realize automatic metering of medicine dropping with the capacity of a single metering hole (21) as the metering unit; The metering method of the metering device comprises the following steps: Step 100, connecting the toothed structure on the outside of the metering disk to a control system via a driving device, and setting the capacity parameters of a single metering hole in the control system; Step 200, taking an average value through multiple experiments, obtaining the angle-number relationship between the rotation angle of the metering disk moving from the starting position and the number of metering holes passing through different drug dropping holes, thereby obtaining the angle-drug dropping amount relationship between the rotation angle and the drug dropping amount of different drug dropping holes; Step 300: According to the angle-drug drop amount relationship, by inputting the target drug drop amount of the designated drug drop hole into the control system, the target rotation angle of the metering disk is obtained, and then the driving device is controlled to rotate the metering disk to the target rotation angle; It also includes a method for improving measurement accuracy, comprising the following steps: Calculate the total angle value N of a single metering hole from the beginning of overlapping with the drug drop hole to the complete overlap, and record the starting angle value of the metering hole overlapping with the drug drop hole as 0; Conducting a test on a single metering hole at a designated drug drop hole at an angle between [0-N] to obtain an actual drug drop amount of the granular product when the metering hole is rotated at a test angle value P; In the [0-N] angle range, the ideal drug drop amount of the drug drop hole is the product of the capacity parameter of a single metering hole and P / N. The actual drug drop amount is compared with the ideal drug drop amount to obtain the difference between the actual drug drop amount and the ideal drug drop amount under different test angle values, and then the relationship between the test angle value P and the difference is obtained. According to the relationship between the test angle value P and the difference, the angle-drug drop amount relationship is fed back and corrected; When the target drug drop amount is not the sum of the capacities of the integer metering holes, the target rotation angle of the metering disk is corrected and calculated based on the corrected angle-drug drop amount relationship.

2. A metering device for granular products according to claim 1, characterized in that: The medicine loading plate (12) is provided with two medicine loading holes (13), and the medicine dropping plate (30) is provided with two medicine dropping holes (31).

3. A metering device for granular products according to claim 1, characterized in that: The number of the metering hole rings (22) is at least 2 groups, and the number of metering holes (21) in a single circle of the metering hole ring (22) is 7-14.

4. A metering device for granular products according to claim 1, characterized in that: A limiting assembly (50) is formed at the connection between the medicine loading plate (12), the metering plate (20) and the medicine dropping plate (30) for restricting the medicine loading plate (12), the metering plate (20) and the medicine dropping plate (30) from deviating from each other.

5. A metering device for granular products according to claim 4, characterized in that: The limiting assembly (50) comprises a limiting protrusion sleeve (51) formed at the center of the medicine upper plate (12), an annular protrusion column (52) formed at the center of the medicine drop plate (30), and an annular hollow column (53) formed at the center of the metering plate (20), wherein the annular hollow column (53) is movably arranged between the annular protrusion column (52) and the limiting protrusion sleeve (51).

6. A metering device for granular products according to claim 5, characterized in that: The limiting raised sleeve (51) comprises a raised sleeve outer edge (59) integrally connected to the body of the upper medicine plate (12), and a raised sleeve inner edge (56) formed inside the raised sleeve outer edge (59), a raised sleeve annular groove (54) is formed between the raised sleeve outer edge (59) and the raised sleeve inner edge (56), a raised sleeve hollow groove (55) is formed inside the raised sleeve inner edge (56), and at least one key groove (525) is provided on the outer wall surface of the raised sleeve inner edge (56); The annular raised column (52) comprises a raised column outer edge (521) and a raised column inner body (522) arranged inside the raised column outer edge (521), a raised column clamping groove (523) is formed between the raised column outer edge (521) and the raised column inner body (522), and at least one raised key (524) is arranged on the inner wall surface of the raised column outer edge (521); The inner body (522) of the protruding column is arranged in the hollow groove (55) of the protruding sleeve, the inner edge (56) of the protruding sleeve is arranged in the protruding column clamping groove (523), and the outer edge (521) of the protruding column and the annular hollow column (53) are both arranged in the annular groove (54) of the protruding sleeve; the outer edge (521) of the protruding column and the inner edge (56) of the protruding sleeve are fixed by a combined connection of the protruding key (524) and the key groove (525), and the annular hollow column (53) is located between the outer edge (521) of the protruding column and the outer edge (59) of the protruding sleeve and is rotatable.

7. A metering device for granular products according to claim 6, characterized in that: The limiting protrusion sleeve (51) further comprises a first screw hole (57) arranged on the sleeve body at a side of the hollow groove (55) of the protrusion sleeve close to the connecting cover (40), and a second screw hole (58) is arranged at the center of the inner body (522) of the protrusion column and is located in the same vertical direction as the first screw hole (57). The medicine loading tray (12) and the medicine dropping tray (30) are fixedly connected by screws passing through the first screw hole (57), the hollow groove (55) of the protrusion sleeve and the second screw hole (58) in sequence, so as to limit the vertical movement and circumferential relative rotation of the medicine loading tray (12) and the medicine dropping tray (30).

8. A metering device for granular products according to claim 6, characterized in that: The number of the key slots (525) is 2-4; the number of the raised keys (524) is 2-4.

9. A metering device for granular products according to claim 1, characterized in that: The side wall of the connection cover (40) and the side wall of the medicine applying housing (10) are connected via screws.

10. A metering device for granular products according to claim 1, characterized in that: A toothed structure (23) is provided on the outer surface of the metering disk (20).

11. A metering device for granular products according to claim 1, characterized in that: The medicine loading shell (10) and the medicine loading plate (12) are an integrated structure.

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