阅读说明：本技术 一种用于散剂生产线设备的计数机构 (Counting mechanism for powder production line equipment ) 是由 陈松柏 谢华金 陈溪 于 2020-11-25 设计创作，主要内容包括：本发明涉及一种用于散剂生产线设备的计数机构,包括输料传送带、包装传送带和计数装置,所述输料传送带与包装传送带串联设置,且所述输料传送带末端位于所述包装传送带首端的正上方；所述输料传送带与包装传送带的结合处设有过渡通道,所述过渡通道的一端固定连接输料传送带,另一端悬空设置在包装传送带的正上方；每个过渡通道上方均设置有一个计数装置,该计数机构通过传感器或微动开关设备代替人工进行计数,可大幅度提高计数效率,实时散剂包装袋质量监测,减少不良品流出,提高包装效率。(The invention relates to a counting mechanism for powder production line equipment, which comprises a material conveying conveyor belt, a packaging conveyor belt and a counting device, wherein the material conveying conveyor belt and the packaging conveyor belt are arranged in series, and the tail end of the material conveying conveyor belt is positioned right above the head end of the packaging conveyor belt; a transition channel is arranged at the joint of the material conveying conveyor belt and the packaging conveyor belt, one end of the transition channel is fixedly connected with the material conveying conveyor belt, and the other end of the transition channel is suspended above the packaging conveyor belt; every transition passageway top all is provided with a counting assembly, and this counting mechanism replaces the manual work through sensor or micro-gap switch equipment to count, can increase substantially counting efficiency, and real-time powder wrapping bag quality monitoring reduces the defective products and flows out, improves packing efficiency.)

1. A counting mechanism for powder production line equipment comprises a conveying conveyor belt, a packaging conveyor belt and a counting device, and is characterized in that the conveying conveyor belt and the packaging conveyor belt are arranged in series, and the tail end of the conveying conveyor belt is positioned right above the head end of the packaging conveyor belt; a transition channel is arranged at the joint of the material conveying conveyor belt and the packaging conveyor belt, one end of the transition channel is fixedly connected with the material conveying conveyor belt, and the other end of the transition channel is suspended above the packaging conveyor belt; defeated material conveyer belt includes many first conveyer belt units, the packing conveyer belt is including the second conveyer belt unit the same with first conveyer belt unit figure, and every terminal below of first conveyer belt unit all corresponds the head end of a second conveyer belt unit, all carries the powder wrapping bag through the transition passageway between each first conveyer belt unit and the second conveyer belt unit that corresponds, and every transition passageway top all is provided with a counting assembly, counting assembly is used for counting the powder wrapping bag of conveying on the defeated material conveyer belt.

2. The counting mechanism according to claim 1, wherein the counting device comprises a fixed cross bar, a connecting bar and photoelectric counting sensors, the fixed cross bar is arranged above the packaging conveyor belt in parallel, two ends of the fixed cross bar are fixedly connected with two sides of the packaging conveyor belt, a group of photoelectric counting sensors is suspended at the tail end of each first conveyor belt unit, and each photoelectric counting sensor is connected with the fixed cross bar through a connecting bar.

3. The counting mechanism of claim 2, wherein the photoelectric counting sensor is hingedly connected to a connecting rod.

4. The counting mechanism according to claim 1, wherein the counting device comprises a packaging press roller, a spring dial and a microswitch, a first conveying roller is arranged at the tail end of the first conveying unit, the packaging press roller is arranged above the first conveying roller, a conveying gap for conveying the powder packaging bag is arranged between the packaging press roller and the first conveying roller, the spring dial is fixedly arranged in front of the conveying gap, the microswitch is arranged on the side, back to the first conveying unit, of the spring dial, and a reed of the microswitch is in contact with the spring dial.

5. The counting mechanism according to claim 1, wherein a weighing mechanism is disposed at the head end of the second conveyor belt unit, the weighing mechanism includes a reversing conveyor belt and a high-precision weight sensor, a gap is provided between the first conveyor belt unit and the second conveyor belt unit in the horizontal direction, the reversing conveyor belt is located at the gap between the first conveyor belt unit and the second conveyor belt unit, the high-precision weight sensor is fixedly connected to the lower side of the reversing conveyor belt, and the weight sensor is used for weighing all objects on the reversing conveyor belt.

6. The counting mechanism of claim 5, wherein an end of said reversing conveyor belt facing away from said second conveyor unit is provided with a reject collection frame.

7. The counting mechanism of claim 1, wherein each first conveyor unit is controlled by a separate motor, and the motor of each first conveyor unit is electrically connected to the corresponding counting device.

Technical Field

The invention relates to the technical field of medicine processing, in particular to a counting mechanism for powder production line equipment.

Background

The powder is a dry powdery preparation prepared by crushing and uniformly mixing a medicament or proper auxiliary materials, and due to the physical characteristics of the powder, the powder is mostly packaged in a small packaging bag and then is uniformly arranged and boxed. At present, powder packaging is carried out in small bags through powder packaging machines, products after the packaging of each packaging machine is completed are collected by a plastic barrel, the plastic barrels are uniformly collected by plastic big plastic bags and transferred to an outer packaging room after being filled with the plastic barrels, and manual uniform counting and packaging are carried out. However, manual counting is not only inefficient, but also has a high error rate of manual counting and occupies an excessively large production area. Traditional artifical count packing mode occupies whole packing production time and exceeds 70%, consequently, need to study one kind and both replace artifical count and group package, and be applicable to the small-size equipment of batch production environment, replace artifical count mode to improve work production efficiency, cross low, the too big scheduling problem of equipment volume in order to solve artifical count efficiency.

Chinese patent document CN208439446U discloses an automatic medicine particle pack counting mechanism, which comprises a counting device and at least one conveying unit leading to a collecting tank, wherein each conveying unit comprises at least one feeding channel, the counting device comprises a counter and an inductor arranged in each feeding channel, and an output end of each inductor is connected with an input end of the counter. The invention arranges an inductor on each feeding channel, and accumulates the counting signals of the inductors by the counter, so as to pack the part of medicine particle packets after the preset number is reached. This mechanism simple structure has effectively improved letter sorting efficiency, can avoid appearing letter sorting packing mistake, but this structure has only solved the mechanical count problem, can't solve and compromise mass production and packet packaging problem.

Chinese patent document CN209258531U discloses a medicine strip pack scattered product sorting and counting device. The automatic counting and sorting device is characterized by comprising a feeding box, a screening device and a counting and sorting device, wherein the upper part of the feeding box is provided with an opening, and one end of the bottom of the feeding box is provided with a discharge hole; the screening device consists of a screening groove, a detection unit and a rejection unit, wherein the inlet end of the screening groove is arranged at the bottom of the discharge port, the bottom of the screening groove is provided with a conveyor belt, and the detection unit and the rejection unit are sequentially arranged on the side wall of the screening groove; the device has replaced artifical arrangement scattered strip package, improves the arrangement efficiency of scattered strip package, has reduced the producers, practices thrift manufacturing cost, but the device only is equipped with a production line, can't realize mass production, assumes to add many production lines simply, and corresponding volume can greatly increased.

Disclosure of Invention

Aiming at the problems in the prior art, the invention discloses powder production line equipment, which aims to solve the problems of low manual counting efficiency and large equipment volume of the existing equipment, so that the equipment can realize counting and grouping packaging, and is suitable for batch production environment.

The specific technical scheme disclosed by the invention is as follows: a counting mechanism for powder production line equipment comprises a material conveying conveyor belt, a packaging conveyor belt and a counting device, wherein the material conveying conveyor belt and the packaging conveyor belt are arranged in series, and the tail end of the material conveying conveyor belt is positioned right above the head end of the packaging conveyor belt; a transition channel is arranged at the joint of the material conveying conveyor belt and the packaging conveyor belt, one end of the transition channel is fixedly connected with the material conveying conveyor belt, and the other end of the transition channel is suspended above the packaging conveyor belt; defeated material conveyer belt includes many first conveyer belt units, the packing conveyer belt is including the second conveyer belt unit the same with first conveyer belt unit figure, and every terminal below of first conveyer belt unit all corresponds the head end of a second conveyer belt unit, all carries the powder wrapping bag through the transition passageway between each first conveyer belt unit and the second conveyer belt unit that corresponds, and every transition passageway top all is provided with a counting assembly, counting assembly is used for counting the powder wrapping bag of conveying on the defeated material conveyer belt.

Further, counting assembly is including fixed horizontal pole, connecting rod and photoelectric type count sensor, fixed horizontal pole parallel arrangement is in packing conveyer belt top, fixed horizontal pole both ends and packing conveyer belt both sides fixed connection, every first conveyer belt unit end all unsettled be provided with a set of photoelectric type count sensor, be connected through a connecting rod between every photoelectric type count sensor and the fixed horizontal pole.

Furthermore, the photoelectric counting sensor is connected with the connecting rod in a hinged mode.

Further, counting assembly includes packing compression roller, spring plectrum and micro-gap switch, and first conveyer belt unit end is equipped with first conveying roller, first conveying roller top is equipped with the packing compression roller, be equipped with the conveying clearance that is used for transporting the powder wrapping bag between packing compression roller and the first conveying roller, spring plectrum fixed mounting is in conveying clearance the place ahead, be equipped with micro-gap switch on the spring plectrum dorsad first conveyer belt unit one side, micro-gap switch's reed and spring plectrum contact.

Furthermore, the head end of the second conveyor belt unit is provided with a weighing mechanism, the weighing mechanism comprises a reversing conveyor belt and a high-precision weight sensor, a gap is formed between the first conveyor belt unit and the second conveyor belt unit in the horizontal direction, the reversing conveyor belt is located in the gap between the first conveyor belt unit and the second conveyor belt unit, the lower portion of the reversing conveyor belt is fixedly connected with the high-precision weight sensor, and the weight sensor is used for weighing the weight of all objects on the reversing conveyor belt.

Furthermore, a defective product collecting frame is arranged at one end, away from the second conveying belt unit, of the reversing conveying belt.

Furthermore, each first conveyor belt unit is controlled by an independent motor, and the motor of each first conveyor belt unit is electrically connected with the corresponding counting device.

Compared with the prior art, the invention has the following advantages:

1) the counting device disclosed by the invention replaces manual counting by the sensor or the microswitch equipment, so that the counting efficiency can be greatly improved, the manual counting error is avoided, the production efficiency is improved, and the production cost is saved.

2) According to the powder packaging machine, the weighing device is arranged below the tail end of the conveying conveyor belt, the weighing device can weigh the weight of the powder packaging bag at present in real time, the number and the weight of the powder packaging bag are monitored by combining the counting device above, the powder packaging bag which is not filled or is not filled in a small quantity can be screened out according to monitoring data, the quality monitoring of the powder packaging bag is realized in real time, the outflow of defective products is reduced, and the packaging efficiency is improved.

3) According to the invention, the defective product collecting frame is arranged on the side of the weighing device, after the defective products are detected by the weighing device, part of products containing the defective products can be collected, and after the defective products are screened out, the products are repackaged, so that the product quality can be ensured.

Drawings

FIG. 1 is a top view of a powder production line apparatus according to an embodiment of the present invention;

FIG. 2 is a front view of a powder production line apparatus according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of the structure at A in FIG. 1;

FIG. 4 is an enlarged view of a portion of the structure of FIG. 2 at B;

FIG. 5 is a schematic diagram of the structure at B in FIG. 2;

FIG. 6 is a schematic structural diagram of a counting device according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a weighing mechanism according to an embodiment of the present invention;

FIG. 8 is a schematic illustration of a first powder dispenser distribution scheme in accordance with an embodiment of the present invention;

fig. 9 is a schematic illustration of a second powder dispenser distribution scheme in accordance with an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example (b):

referring to fig. 1 and 2, a powder production line device is used for a powder packaging bag production process, and comprises a distribution device 3, a conveying conveyor belt 1, a counting device 4 and a packaging conveyor belt 2, wherein the conveying conveyor belt 1 and the packaging conveyor belt 2 are arranged in series, and the tail end of the conveying conveyor belt 1 is positioned right above the head end of the packaging conveyor belt 2; the distribution device 3 is positioned on the side of the material conveying conveyor belt 1 and used for distributing the propellant packaging bags into the material conveying conveyor belt 1; a transition channel 5 is arranged at the joint of the material conveying conveyor belt 1 and the packaging conveyor belt 2, one end of the transition channel 5 is fixedly connected with the material conveying conveyor belt 1, and the other end of the transition channel is suspended above the packaging conveyor belt 2; counting assembly 4 is located transition 5 tops, counting assembly 4 is used for counting the powder wrapping bag of defeated material conveyer belt 1 conveying on.

More specifically, the feeding conveyor belt 1 includes a plurality of first conveyor belt units 11, the first conveyor belt units 11 are arranged side by side, the distribution device 3 includes third conveyor belt units 31 having the same number as that of the first conveyor belt units, and each first conveyor belt unit 11 corresponds to one group of third conveyor belt units 31; the packaging conveyor belt 2 comprises second conveyor belt units 21 with the same number as that of the first conveyor belt units 11, and the lower part of the tail end of each first conveyor belt unit 11 corresponds to the head end of one second conveyor belt unit 21. In addition, each of the first conveyor unit 11, the second conveyor unit 21, and the third conveyor unit 31 is controlled by a separate motor.

It should be noted that the head end of each third conveyor belt unit 31 is connected to a powder dispenser, as shown in fig. 3, which is a device capable of quantitatively dispensing sterile powder medicine into sterilized and dried packaging bags and sealing the packaging bags; the powder packaging bag conveying device is characterized in that a position sensor for detecting powder packaging bags is arranged on the third conveyor belt unit 31, a driving mechanism 32 for controlling the third conveyor belt unit to move is arranged at the tail end of the third conveyor belt unit 31, the position sensor and the driving mechanism 32 are electrically connected, the arrangement distance of the powder packaging bags on the third conveyor belt unit 31 can be detected through the position sensor, the conveying speed of the third conveyor belt unit 31 is controlled according to the arrangement distance of the powder packaging bags, and therefore the purpose that the powder packaging bags are arranged on the first conveyor belt unit 11 at equal intervals is achieved.

More specifically, the position data detected by the position sensor is the distance S1 between the current powder packaging bag and the discharge port position at the end of the third conveyor unit 31, the conveying speed V1 of the third conveyor unit 31 is obtained according to the formula by setting the arrangement interval of the powder packaging bags on the first conveyor unit 11 to be S2 and setting the conveying speed of the first conveyor unit 11 to be V2:

after the required conveying speed of the third conveyor belt unit 31 is calculated by a processing chip in the driving mechanism 32, the change of the rotating speed of the driving motor can be controlled, so that the corresponding conveying speed change of the third conveyor belt unit 31 is realized. By means of the mode, the powder packaging bags can be dynamically adjusted to be arranged at equal intervals on the first conveyor belt unit 11, and subsequent counting is facilitated.

In addition, in this embodiment, the conveying direction of the third conveyor belt unit 31 is perpendicular to the conveying direction of the first conveyor belt unit 11, the powder dispenser connected to the third conveyor belt unit 31 is located at the side of the material conveying conveyor belt 1, one end of the third conveyor belt unit 31 is fixedly connected to the discharge port of the corresponding powder dispenser, and the other end of the third conveyor belt unit 31 is suspended above the first conveyor belt unit 11, it should be noted that, in order to ensure that the powder package bag stably falls into the first conveyor belt unit 11, the end of each third conveyor belt unit 31 is flush with the side wall of the corresponding first conveyor belt unit 11, which is close to the third conveyor belt unit.

And a position of the third conveyor belt unit 31, which is connected with the discharge port of the powder dispenser, is provided with a limit baffle 33, and the limit baffle 33 is arranged above the third conveyor belt unit 31 in parallel. When the powder packaging bags just fall to the third conveyor belt unit 31 from the discharge port of the powder packaging machine, the powder packaging bags can be sequentially arranged on the third conveyor belt unit 31 through the limiting baffle 33. More specifically, when the powder packaging bags are discharged from the powder dispenser, a plurality of powder packaging bags are overlapped, when the powder packaging bags pass through the limit baffle 33, because the gap between the limit baffle 33 and the third conveyor belt unit 31 can only pass through one bag of powder packaging bag at the same time, the powder packaging bags positioned at the lowest layer in the overlapped powder packaging bags can be conveyed through the third conveyor belt unit 31, and the powder packaging bags positioned at the upper layer are blocked by the limit baffle 33.

The feeding conveyor belt 1 in this embodiment includes 8 first conveyor belt units 11, and the 8 first conveyor belt units 11 are arranged side by side, wherein the tail ends of the adjacent first conveyor belt units 11 are arranged in parallel. In this embodiment, two distribution schemes of the powder dispenser are provided, as shown in fig. 8, the first distribution scheme is: according to the conveying direction of the conveying conveyor belt 1, 8 powder dispensers are sequentially arranged on the same side of the conveying conveyor belt 1, the length of a third conveyor belt unit 31 connected with the powder dispensers is sequentially increased, and therefore each third conveyor belt unit 31 corresponds to one first conveyor belt unit 11. This scheme is applicable to long and narrow workshop production line environment, through with defeated material conveyer belt 1, distributor 3 sets up in same clean workshop I, packing conveyer belt 2 then sets up at adjacent packing shop II, clean workshop I separates the setting with packing shop II, has guaranteed that powder is located the environment clean, avoids the medicine to receive the pollution, and the while powder wrapping bag is divided into groups after can the accurate count, improves packing efficiency.

As shown in fig. 9, the second distribution scheme is: with the intermediate position of defeated material conveyer belt 1 as the axis of symmetry, 8 powder racking machines symmetry sets up in defeated material conveyer belt 1 both sides, and 8 third conveyer belt units 31 are established to 4 groups according to length simultaneously, and every group includes two third conveyer belt units 31 that length is the same, and every group symmetry respectively sets up defeated material conveyer belt 1 top. The scheme is suitable for the environment with limited workshop size, and the length of the conveying conveyor belt 1 can be greatly reduced due to the symmetrical arrangement of the distribution devices.

As shown in fig. 4-5, each first conveyor belt unit and the corresponding second conveyor belt unit are used for conveying the powder packaging bags through a transition passage, and a counting device 4 is arranged above each transition passage. Counting assembly 4 is including fixed horizontal pole 44, connecting rod 45 and photoelectric type count sensor 46, fixed horizontal pole 44 parallel arrangement is in packing conveyer belt 2 top, fixed horizontal pole 44 both ends and packing conveyer belt 2 both sides fixed connection, every first conveyer belt unit 11 end is all unsettled at the position apart from 5 ~ 8cm to be provided with a set of photoelectric type count sensor 46, be connected through a connecting rod 45 between every photoelectric type count sensor 46 and the fixed horizontal pole 44, preferably, photoelectric type count sensor 46 adopts articulated mode with the hookup location of connecting rod 45, and this structure makes photoelectric type count sensor can adjust at any time and surveys the angle. When each bag of powder packaging bags is conveyed from the tail end of the first conveyor belt unit 11 to the head end of the second conveyor belt unit 21, the powder packaging bags pass through the sensing area of the photoelectric counting sensor 46, the counting signal is increased once when the photoelectric counting sensor 46 senses each powder packaging bag, the counting signal is reset until the counting reaches a set target value, and meanwhile, an action signal is sent out, and the action signal is used for controlling equipment in the next process to convey the powder packaging bags reaching the set number to a subsequent station for packaging.

It should be noted that, the counting device 4 may also adopt a mechanical counting mechanism for counting in addition to the photoelectric counting sensor, as shown in fig. 6, the mechanical counting mechanism includes a packaging pressing roller 41, a spring dial 42 and a micro switch 43, a first conveying roller is arranged at the end of the first conveying unit 11, the packaging pressing roller 41 is arranged above the first conveying roller, a conveying gap for conveying the powder packaging bag is arranged between the packaging pressing roller 41 and the first conveying roller, the spring dial 42 is fixedly mounted at a position of about 2-3cm in front of the conveying gap, the micro switch 43 is arranged on one side of the spring dial 42, which faces away from the first conveying unit, the micro switch 43 is provided with a reed for opening and closing the switch, and the reed is in contact with the spring dial 42. When the powder packaging bag is conveyed to the position of the first conveying roller by the first conveying belt unit 11, the powder packaging bag is pressed through the conveying gap and is conveyed for a certain distance, at the moment, the powder packaging bag stirs the spring poking piece 42, the spring poking piece 42 drives the reed to extrude the microswitch 43, at the moment, the microswitch 43 generates a signal change, and when the powder packaging bag completely leaves the conveying gap, the powder packaging bag is flicked downwards to the second conveying belt unit 21 through elastic potential energy accumulated by the spring poking piece 42. This mechanical type counting mechanism not only can carry out wrapping bag tally function for photoelectric type count sensor, simultaneously because the separation of spring plectrum 42, can avoid the powder wrapping bag to produce the flat throw motion when falling from first conveyer belt unit 11, causes the partial region at second conveyer belt unit 21 head end can't accept the wrapping bag, causes the space extravagant.

In addition, the motor of each first conveyor belt unit 11 in this embodiment may be electrically connected to the corresponding counting device 4, when the count of the counting device 4 reaches a set target value, the counting device 4 may generate a control signal to transmit the control signal to the motor of the current first conveyor belt unit 11, the motor may reduce the transmission speed of the first conveyor belt unit 11 after receiving the control signal, and after running at a low speed for a period of time, the transmission speed is recovered, and at this time, the second conveyor belt unit 21 has already conveyed the counted powder packaging bags to the next station.

In addition, a weighing mechanism 6 may be further provided at the head end of the second conveyor belt unit 21, where the weighing mechanism in this embodiment includes a reversing conveyor belt 61 and a high-precision weight sensor 62, a gap is provided between the first conveyor belt unit 11 and the second conveyor belt unit 21 in the horizontal direction, the reversing conveyor belt 61 is located at the gap between the first conveyor belt unit 11 and the second conveyor belt unit 22, it should be noted that there is no direct connection relationship between the reversing conveyor belt 61 and the first conveyor belt unit 11 and between the reversing conveyor belt 61 and the second conveyor belt unit 21, the powder packaging bag conveyed by the first conveyor belt unit 11 first falls onto the reversing conveyor belt 61 for weighing, and after the weight is qualified, the reversing conveyor belt 61 conveys the current powder packaging bag onto the second conveyor belt unit 21 for entering a subsequent packaging process. In order to achieve the weighing purpose, the high-precision weight sensor 62 is fixedly connected below the reversing conveyor belt 61, the weight sensor 62 is used for weighing the weight of all objects (including the weight of the reversing conveyor belt) on the reversing conveyor belt, when the powder packaging bags on the reversing conveyor belt 61 reach the set target number, the reversing conveyor belt 61 generates a weight value signal, the weight value subtracts the fixed weight of the reversing conveyor belt 61 to obtain the weight of the powder packaging bags on the current reversing conveyor belt 61, the current number of the powder packaging bags on the reversing conveyor belt 61 can be obtained due to the consistent weight of each bag of powder, the value is compared with the numerical value of the counting device 4, by the method, the actual counting confusion caused by the logic error of the counting device 4 can be prevented, and meanwhile, the packaging bags which are not loaded or are loaded in the powder packaging belt can be screened out, avoiding the outflow of bad products.

Furthermore, a defective product collecting frame 7 or other alternative devices for collecting defective products may be disposed at an end of the reversing conveyor 61 away from the second conveyor unit 21, and when the weight of the powder packaging bags on the reversing conveyor 61 does not meet the set target value or exceeds the fluctuation range, the reversing conveyor 61 will convey the powder packaging bags into the defective product collecting frame 7 to be screened out for defective packages. The reversing conveyor belt 61 can be used for screening neglected loading and less loading processes in a mode of comparing the weight of the powder packaging bag in real time, and the principle of the method is as follows: because the weight difference of each bag of powder is small, when each bag of powder packaging bag falls onto the reversing conveyor belt 61, the numerical value of the weight sensor 62 is increased according to the increasing numerical sequence, calculation can be carried out according to the number of the packaging bags counted by the counting device 4 in real time, the preset weight numerical value of the powder packaging bag on the reversing conveyor belt 61 at present is obtained, the preset weight numerical value is compared with the actual weighing numerical value, when the difference is large or exceeds the error range, the reversing conveyor belt 61 immediately conveys the current powder packaging bag into the defective product collecting frame 7, meanwhile, the counting device 4 is reset, and the number of the powder packaging bags is counted again.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.