阅读说明：本技术 一种变量给料装置及具有该变量给料装置的定量包装机 (Variable feeding device and quantitative packaging machine with same ) 是由 帅进 梁莉 刘慧婷 于 2019-08-29 设计创作，主要内容包括：本发明提供了一种定量包装机的变量给料装置,包括箱体、下料斗、电机、往复摆动机构、粗给料口、细给料部分和称重斗,其中,所述下料斗设置在所述箱体的顶层顶部,所述下料斗的出料口与所述粗给料口的进料口对接,所述电机通过所述往复摆动机构与所述细给料部分连接,所述细给料部分与所述箱体旋转连接,所述细给料部分上设有变流量细给料口,所述细给料部分挡在所述粗给料口的出料口处,形成所述粗给料口的出料口的料门。本发明还提供了一种具有变量给料装置的定量包装机。本发明的有益效果是：简化了结构,能实现变流量细给料,在保证给料速度和给料重量的情况下,精度得到提高,工作效率高。(The invention provides a variable feeding device of a quantitative packaging machine, which comprises a box body, a feeding hopper, a motor, a reciprocating swing mechanism, a coarse feeding port, a fine feeding part and a weighing hopper, wherein the feeding hopper is arranged at the top of the top layer of the box body, a discharging port of the feeding hopper is in butt joint with a feeding port of the coarse feeding port, the motor is connected with the fine feeding part through the reciprocating swing mechanism, the fine feeding part is rotatably connected with the box body, the fine feeding part is provided with a variable flow fine feeding port, and the fine feeding part is blocked at the discharging port of the coarse feeding port to form a material gate of the discharging port of the coarse feeding port. The invention also provides the quantitative packaging machine with the variable feeding device. The invention has the beneficial effects that: the structure is simplified, the variable-flow fine feeding can be realized, the precision is improved under the condition of ensuring the feeding speed and the feeding weight, and the working efficiency is high.)

1. A variable feed device, characterized by: comprises a box body, a blanking hopper, a motor, a reciprocating swing mechanism, a coarse feeding port, a fine feeding part and a weighing hopper, wherein the discharging hopper is arranged at the top of the top layer of the box body, the discharging port of the discharging hopper is butted with the feeding port of the coarse feeding port, the motor is connected with the fine feeding part through the reciprocating swing mechanism, the fine feeding part is rotationally connected with the box body, the fine feeding part is provided with a variable flow fine feeding port, the fine feeding part is blocked at the discharge port of the coarse feeding port to form a material door of the discharge port of the coarse feeding port, the motor drives the fine feeding part to rotate through the reciprocating swing mechanism, so that the discharge hole of the coarse feeding port is in overlapped communication or partially overlapped communication with the variable flow fine feeding port, and the weighing hopper is positioned right below the discharge hole of the coarse feeding port.

2. A variable feed device according to claim 1, characterized in that: the opening width of the variable flow rate fine feeding port of the fine feeding portion becomes gradually larger from one end to the other end.

3. A variable feed device according to claim 1, characterized in that: the variable-flow fine feeding port of the fine feeding part is an isosceles triangle port or an isosceles trapezoid port.

4. A variable feed device according to claim 1, characterized in that: the fine feeding part is a circular arc-shaped rotating charging door.

5. A variable feed device according to claim 1, characterized in that: the variable feeding device further comprises a controller, and the controller is connected with the motor and the weighing hopper respectively.

6. A variable feed device according to claim 5, characterized in that: the controller is a PLC controller.

7. A variable feed device according to claim 1, characterized in that: the fine feeding part is rotationally connected with the box body through a rotating shaft.

8. A variable feed device according to claim 1, characterized in that: the motor is a stepping motor.

9. A variable feed device according to claim 1, characterized in that: the reciprocating swing mechanism is a crank and rocker mechanism, a crank in the crank and rocker mechanism is connected with the motor, and a rocker in the crank and rocker mechanism is connected with the fine feeding part.

10. A quantitative packaging machine with variable feeding device, characterized in that: comprising a variable feed device according to any of claims 1 to 9.

Technical Field

The invention relates to a variable feeding device, in particular to a variable feeding device and a quantitative packaging machine with the same.

Background

With the development of automatic detection and control technology, the precision requirement of the automatic packaging machine is higher and higher, the automatic packaging machine is developed rapidly, and the automatic packaging machine is widely applied to various industries. According to the quantitative principle, the automatic packaging machine can be divided into a weighing type and a constant volume type, and the weighing mode is more convenient for improving the weighing precision of the packaging machine.

The weighing type automatic packaging machine is mainly characterized in that a storage hopper, a feeding door, a weighing sensor, a weighing hopper, a discharging door, a discharging hopper and the like are mutually matched to finish feeding, weighing and discharging actions, and the automatic packaging process of materials is realized. The weight of the weighing type automatic packaging machine is achieved by the mutual matching of the feeding device and the weighing device, and the precision, the quality and the efficiency of packaging can be greatly improved by the design of the feeding device.

A commonly used weighing and feeding device is controlled by an electric cylinder, an air cylinder and the like, and the working process of the weighing and feeding device is as follows:

1. when the materials in the storage hopper are enough, the materials enter the gravity feeding device under the action of gravity, and the charging door is completely opened through one of the cylinders to enter a large feeding state.

2. When a given large feed weight is reached, the other cylinder is opened by closing the first cylinder, so that the gate enters a small feed state leaving a slit.

3. When the small feeding weight is given, the feeding door is completely closed, the weighing hopper is stable through certain aerial blanking, and when the bag clamping mechanism is clamped, the discharging door is opened, the material enters the discharging hopper and then falls into the bag, so that a packaging cycle is completed.

At present, the development trend of transmission power in a feeding device is changed from a cylinder to a stepping motor, and in order to accelerate feeding speed, external force measures such as air pressure, vibration and the like are added to the feeding power on the basis of material gravity.

The existing feeding device has the following defects:

1. although the common cylinder transmission is fast, the power is large, the overload capacity is strong, the requirement on the tightness of a system is high, air leakage is easy, and the control precision is not easy to control due to the fact that the speed is too fast.

2. The traditional feeding device has the disadvantages of complex integral structure, higher cost and difficult cleaning and maintenance.

3. At present, a feeding part of a feeding device consists of coarse feeding and fine feeding, a feeding port of the fine feeding is generally constant in flow, and the achievable precision is limited by the size of the fine feeding port to influence the feeding speed and precision.

For example, when the amount is 100kg, the raw material feed value is preferably 90 kg. If the feeding hopper opening is too large, the discharging speed is very high, when the weighing hopper is weighed to 90kg (the instantaneous impact value is, and the actual weight is lower than 90 kg), the feeding hopper door is changed from full opening to small opening, the material flowing out in the process and the material column in the air can continuously flow to the weighing hopper, and the feeding door does not relate to the small opening position, the weighing hopper is weighed to 100kg, the feeding hopper door is commanded to be closed, namely, the fine feeding process is not carried out, the feeding hopper door is closed, and the actual weight of the material is more than 100kg, so that the metering process cannot be normally carried out, and the packaging precision is influenced. If the coarse feed value is set to be smaller, the metering process can be normally operated, but the fine feed time is prolonged, and the packaging speed is influenced.

Therefore, how to better simplify the structure and give consideration to both the feeding precision and the feeding speed is a technical problem to be solved urgently by those skilled in the art.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a variable feeding device and a quantitative packaging machine with the same.

The invention provides a variable feeding device of a quantitative packaging machine, which comprises a box body, a blanking hopper, a motor, a reciprocating swing mechanism, a coarse feeding port, a fine feeding part and a weighing hopper, wherein the discharging hopper is arranged at the top of the top layer of the box body, the discharging port of the discharging hopper is butted with the feeding port of the coarse feeding port, the motor is connected with the fine feeding part through the reciprocating swing mechanism, the fine feeding part is rotationally connected with the box body, the fine feeding part is provided with a variable flow fine feeding port, the fine feeding part is blocked at the discharge port of the coarse feeding port to form a material door of the discharge port of the coarse feeding port, the motor drives the fine feeding part to rotate through the reciprocating swing mechanism, so that the discharge hole of the coarse feeding port is in overlapped communication or partially overlapped communication with the variable flow fine feeding port, and the weighing hopper is positioned right below the discharge hole of the coarse feeding port.

As a further improvement of the present invention, the opening width of the variable flow rate fine feeding port of the fine feeding portion becomes gradually larger from one end to the other end.

As a further improvement of the invention, the variable flow fine feeding port of the fine feeding part is an isosceles triangle port or an isosceles trapezoid port.

As a further improvement of the invention, the fine feeding part is a circular arc-shaped rotating charging door.

As a further improvement of the invention, the variable feeding device further comprises a controller, and the controller is respectively connected with the motor and the weighing hopper.

As a further improvement of the invention, the controller is a PLC controller.

As a further improvement of the invention, the fine feeding part is rotationally connected with the box body through a rotating shaft.

As a further improvement of the present invention, the motor is a stepping motor.

As a further improvement of the invention, the reciprocating swing mechanism is a crank and rocker mechanism, a crank in the crank and rocker mechanism is connected with the motor, and a rocker in the crank and rocker mechanism is connected with the fine feeding part.

The invention also provides a dosing packaging machine with a variable feed device comprising a variable feed device as defined in any one of the preceding claims.

The invention has the beneficial effects that: through the scheme, the structure is simplified, variable-flow fine feeding can be realized, the precision is improved under the condition of ensuring the feeding speed and the feeding weight, and the working efficiency is high.

Drawings

Fig. 1 is a front view of a variable feeding apparatus of a quantitative packaging machine of the present invention.

Fig. 2 is a side view of a variable feeding device of a quantitative packaging machine of the present invention.

Fig. 3 is a schematic view of the fine feed portion of the variable feed device of the quantitative packaging machine of the present invention.

Fig. 4 is a schematic view of the fine feed portion of the variable feed device of the quantitative packaging machine of the present invention.

Detailed Description

The invention is further described with reference to the following description and embodiments in conjunction with the accompanying drawings.

As shown in fig. 1 to 4, a variable feeding device of a quantitative packaging machine comprises a box body 1, a lower hopper 4, a motor 3, a reciprocating swing mechanism, a coarse feeding port 6, a fine feeding portion 7 and a weighing hopper 8, wherein the lower hopper 4 is arranged on the top of the top layer of the box body 1, a discharging port of the lower hopper 4 is in butt joint with a feeding port of the coarse feeding port 6, the motor 3 is connected with the fine feeding portion 7 through the reciprocating swing mechanism, the fine feeding portion 7 is rotatably connected with the box body 1, the fine feeding portion 7 is provided with a variable flow fine feeding port, the fine feeding portion 7 is blocked at a discharging port of the coarse feeding port 6 to form a gate of the discharging port of the coarse feeding port 6, the motor 3 drives the fine feeding portion 7 to rotate through the reciprocating swing mechanism to enable the discharging port of the coarse feeding port 6 to be in overlapped communication or partially overlapped communication with the variable flow fine feeding port, the weighing hopper 8 is positioned right below the discharge hole of the coarse feeding port 6.

As shown in fig. 1 to 4, the opening width of the variable flow rate fine feeding port of the fine feeding portion 7 becomes gradually larger from one end to the other end.

As shown in fig. 1 to 4, the variable flow rate fine feeding port of the fine feeding portion 7 is an isosceles triangle port 10 or an isosceles trapezoid port.

As shown in fig. 1 to 4, the fine feeding portion 7 is a circular arc shaped rotary gate.

As shown in fig. 1 to 4, the variable feeding device further includes a controller, and the controller is respectively connected to the motor 3 and the weighing hopper 8, and is configured to control the motor 3 and the weighing hopper 8.

As shown in fig. 1 to 4, the controller is a PLC controller 11.

As shown in fig. 1 to 4, the fine feeding portion 7 is rotatably connected to the casing 1 by a rotating shaft 9.

As shown in fig. 1 to 4, the motor 3 is preferably a stepping motor, and the stepping motor is mounted on the bearing table 2.

As shown in fig. 1 to 4, the reciprocating swing mechanism is a crank and rocker mechanism 5, a crank in the crank and rocker mechanism 5 is connected with the motor 3, and a rocker in the crank and rocker mechanism 5 is connected with the fine feeding part 7.

The invention also provides a dosing packaging machine with a variable feed device comprising a variable feed device as defined in any one of the preceding claims.

According to the variable feeding device and the quantitative packaging machine with the variable feeding device, the stepping motor is controlled by the PLC 11 to drive the crank rocker mechanism 5, the fine feeding part 7 is connected with the rocker, and the weighing system is arranged at the bottom. The PLC controller 11 is activated to initialize the position of the fine feed section 7, at which time the fine feed section 7 is angularly offset and the coarse feed port 6 is fully open. When the preset value of coarse feeding is reached, the PLC 11 controls the motor 3 to rotate, the fine feeding part 6 swings back, the coarse feeding port 6 is gradually closed, and the fine feeding port is gradually opened. The fine feeding part 7 is provided with an isosceles triangle opening 10, so that variable-flow fine feeding is realized. After the target weight is reached, the fine feeding part 7 is completely closed, the preparation time prepares for feeding next time, at the moment, the weighing hopper 8 is stable, the weighed weight is an accurate value of the actual weight, the value is compared with the target value to obtain an error value, because the fine feeding part 7 rotates, one side of the isosceles triangle port 10 firstly passes through the coarse feeding port 6, then the overlapping communication area of the isosceles triangle port 10 and the coarse feeding port 6 is gradually reduced, namely the variable flow rate fine feeding port is gradually reduced, the feeding flow rate is reduced, therefore, the variable flow rate fine feeding port can accurately control the feeding amount, when the next feeding period is carried out, the error value can be compensated by controlling the rotating speed of the fine feeding part 6 through the motor 3, and the feeding precision is further improved.

The variable feeding device provided by the invention has the advantages that the packaging precision is ensured under the condition of ensuring the packaging speed and the weight of the packaging machine, the variable flow fine feeding is realized, the problem of insufficient precision of the conventional packaging machine is solved, the quality of the packaging machine is improved, the structure is simple, the size of the device is small, and the realization is convenient.

The variable feeding device and the quantitative packaging machine with the variable feeding device provided by the invention have the following advantages:

1. the arc rotating material door has the advantages of no material blocking and blockage, low material size requirement and good adaptability to different materials and packaging weights.

2. Have the thin feed inlet of unsteady flow volume, the feed inlet shape is triangle-shaped, can realize the thin feed of unsteady flow volume, and the precision obtains improving under the circumstances of guaranteeing packing speed and packing weight, and work efficiency is high.

3. The mechanism device is simple, the crank rocker mechanism is used as a transmission system, the operation is simple, the maintenance is convenient, and the manufacturing cost is reduced.

The invention provides a variable feeding device and a quantitative packaging machine with the same, belongs to the field of variable feeding devices of packaging machines, particularly relates to the design of a mechanical structure of the feeding device of the packaging machine, can be widely applied to feeding and packaging of different granular materials in the fields of food, chemical industry, pharmacy, mineral products and the like, and is used for realizing accurate variable feeding of quantitative packaging.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.