High-precision metering device of powder packaging machine

Abstract

A high-precision metering device of a powder packaging machine comprises a hopper, a motor, a discharging pipe, a mounting seat, a buffer storage bin and a metering screw, the hopper is formed by assembling a top cover, a shell and a feeding bin, the buffer storage bin is arranged at a discharging port of the feeding bin, the discharging pipe is arranged at the bottom end of the buffer storage bin, a pressure sensor is arranged between the discharging pipe and the buffer storage bin, and the metering screw is connected with the motor. A connecting device is arranged on a top cover of the hopper, a motor is arranged at the top end of the connecting device, a rotating shaft of the motor is in transmission connection with the metering screw through a transmission mechanism, the metering screw and the discharging pipe are coaxially arranged, a sliding rail is arranged on the installation base, and the installation base is in sliding connection with the connecting device. Through the pressure sensor arranged between the buffer storage bin and the discharging pipe, the weight of the materials in the buffer storage bin can be accurately monitored, and meanwhile, the precision of the metering device can be effectively improved through cooperation with rotation of the metering screw and the motor.

Description

Technical Field

[0001] The utility model relates to the field of packaging machines, in particular to a high-precision metering device for a powder packaging machine. Background Art

[0002] During the production and packaging process, when powder items are bagged, the weight of the bag needs to be strictly controlled, especially for some small bag-packaged foods, the weight of each small bag needs to be accurately controlled. The powder metering device is a device used for quantitative packaging of powder items, usually including a feeding hopper, a powder metering bin for storing powder, a motor, etc. There is a screw rod in the powder metering bin. The motor drives the screw rod to rotate a certain number of times, and the screw rod can guide a certain amount of powder through the discharge pipe into the packaging bag, thereby achieving quantitative packaging.

[0003] At present, a Chinese patent with the authorization announcement number CN217598969U discloses a powder filling anti-dropping device, including: a fixed plate, a lifting device, a stirring device and a filling mechanism, the lifting device is connected to the fixed plate, the stirring device is connected to the upper end of the lifting device, and the filling mechanism is connected to the stirring device. Among them, the filling mechanism includes: a storage hopper, a filling screw, a screw sleeve, a fixing nut, a sleeve and an exhaust hole. Compared with the traditional technology, the utility model reduces the aperture of the screw outlet by adding a sleeve to the screw sleeve, which facilitates the material to fall from the bottom of the screw after the filling is completed, and at the same time facilitates the filling and metering of the powder product.

[0004] The above-mentioned prior art solution has the following defects: the device does not have a special powder metering bin, and the metering can only rely on the number of revolutions of the screw, the accuracy is not high enough, and the upper and lower positions cannot be simply adjusted, and the cost of adapting to different filling products is high. Utility Model Content

[0005] The purpose of the utility model is to provide a high-precision metering device for a powder packaging machine to solve the problems existing in the above-mentioned prior art.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: a high-precision metering device for a powder packaging machine, comprising a hopper, a motor, a discharge pipe, a mounting seat, a cache silo and a metering screw, the hopper being assembled from a top cover, an outer shell and a feeding hopper, a cache silo being arranged at the discharge port of the feeding hopper, a discharge pipe being arranged at the bottom end of the cache silo, a pressure sensor being arranged between the discharge pipe and the cache silo, a connecting device being arranged on the top cover of the hopper, a motor being arranged at the top end of the connecting device, a rotating shaft of the motor being transmission-connected to the metering screw through a transmission mechanism, the metering screw being coaxially arranged with the discharge pipe, a slide rail being arranged on the mounting seat, and the mounting seat being slidably connected to the connecting device.

[0007] By adopting the above technical solution, the motor and the metering screw can adjust the discharge speed and amount of the powder, and the buffer silo is made of stainless steel 304, which has high strength and will not deform. The inner surface of the buffer silo is mirror-polished to facilitate the discharge of powder. The pressure sensor installed between the discharge pipe and the buffer silo can well monitor the pressure inside the buffer silo to achieve high-precision metering control.

[0008] In a further embodiment, the connecting device includes a first connecting part, a second connecting part and a third connecting part, a transmission mechanism is disposed in the first connecting part, and the first connecting part is fixed to the second connecting part by bolts.

[0009] By adopting the above technical solution, the motor itself is not in direct contact with the screw, but through the transmission mechanism. The first connecting part has a certain sealing property for the transmission mechanism arranged inside, which can prevent dust from entering and affecting the transmission mechanism, while the other two connecting parts connect the metering device and the mounting base, and enable them to move under certain conditions.

[0010] In a further embodiment, a limiting device is fixedly installed on one side of the second connecting portion close to the hopper, and a plurality of positioning holes are evenly spaced on both sides of the second connecting portion.

[0011] By adopting the above technical solution, these positioning holes are used for both fixing and conveniently adjusting the height of the second connecting part itself.

[0012] In a further embodiment, the limiting device includes an upper part and a lower part, the upper part is provided with a through groove and a through hole, the bottom end of the upper part is provided with a positioning hole, the lower part is inserted into the positioning hole at the bottom end of the upper part, the periphery of the top cover is evenly provided with through holes, and the top cover is fixed to the upper bolts.

[0013] By adopting the above technical solution, the limiting device fixes the top cover of the hopper therein, and the top cover is bolted to the hopper, thereby limiting the entire metering device, and the limiting device is welded to one side of the second connecting part.

[0014] In a further embodiment, the second connecting part is bolted and fixed to the third connecting part, the third connecting part is assembled from a first limit block, a second limit block, a fixed beam, a connecting part body, a third limit block and a fourth limit block, a through hole is provided on the fourth limit block, a positioning hole is provided on the top of the mounting seat, the positioning hole is coaxially arranged with the through hole of the fourth limit block, and a positioning screw is provided in the through hole.

[0015] By adopting the above technical solution, the first limit block and the second limit block fix the connecting part body from the left and right sides, and a fixed beam is provided on the connecting part body. This fixed beam is used to help position the third connecting part, and the fourth positioning hole fixes the connecting part body on the front side of the mounting seat from the back side of the mounting seat. The positioning screws installed in the through holes provided on the limit blocks and the mounting seat can adjust the position of the metering device up and down.

[0016] In a further embodiment, a metal pipeline is arranged on the mounting base, a control terminal is arranged at the other end of the metal pipeline, and a display screen is arranged on the control terminal.

[0017] In a further embodiment, a metal through-tube is provided at one end of the top cover, and a detachably mounted air pressure regulating device is provided at the other end of the metal through-tube.

[0018] By adopting the above technical solution, a PLC is arranged in the control terminal, and the entire metering device can be operated through the touch screen to detect the operating state, speed and efficiency of the metering device.

[0019] In summary, the utility model has the following beneficial effects:

[0020] 1. Through the setting of the buffer silo and the pressure sensor, the powder can first fall from the hopper into the buffer silo, and then the powder in the silo is measured by the pressure sensor, thereby improving the accuracy of the metering device;

[0021] 2. Through the setting of the mobile device, the height and angle of the metering device can be adjusted according to different production processes, so that the production line adjustment is more flexible;

[0022] 3. Through the setting of the air pressure adjustment device, the air pressure in the device can be adjusted to avoid damage to the pipeline while ensuring the air tightness of the device and preventing the powder from escaping from the metering device to cause dust pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 It is a structural schematic diagram used to embody the connection device in the utility model;

[0025] Figure 3 It is a schematic diagram of the structure used to reflect the interior of the metering device in the utility model.

[0026] In the figure, 1. hopper; 11. top cover; 12. shell; 13. feeding bin; 2. motor; 3. discharge pipe; 4. mounting seat; 41. slide rail; 5. buffer bin; 51. pressure sensor; 6. metering screw; 7. connecting device; 71. first connecting part; 72. second connecting part; 721. limit device; 73. third connecting part; 731. first limit block; 732. second limit block; 733. fixed beam; 734. connecting part body; 735. third limit block; 736. fourth limit block; 8. control terminal; 9. display screen; 10. air pressure adjustment device. DETAILED DESCRIPTION

[0027] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0028] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the attached Figure 1 In the description of this specification, the words "bottom" and "top", "inside" and "outside" refer to directions toward or away from a particular component geometry, respectively. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this specification, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0029] Example:

[0030] like Figure 1-3As shown, a high-precision metering device for a powder packaging machine includes a hopper 1, a motor 2, a discharge pipe 3, a mounting seat 4, a buffer bin 5 and a metering screw 6. The hopper 1 is assembled from a top cover 11, a shell 12 and a feeding bin 13. The discharge port of the feeding bin 13 is provided with a buffer bin 5, the bottom end of the buffer bin 5 is provided with a discharge pipe 3, a pressure sensor 51 is provided between the discharge pipe 3 and the buffer bin 5, a connecting device 7 is provided on the top cover 11 of the hopper 1, a motor 2 is provided on the top of the connecting device 7, the rotating shaft of the motor 2 is transmission-connected to the metering screw 6 through a transmission mechanism, the metering screw 6 is coaxially arranged with the discharge pipe 3, a slide rail 41 is provided on the mounting seat 4, the mounting seat 4 is slidably connected to the connecting device 7, and a metal pipeline is provided on the mounting seat 4. A control terminal 8 is provided at the other end of the metal pipeline, and a display screen 9 is provided on the control terminal 8. A metal through pipe is provided at one end of the top cover 11, and a detachable air pressure adjustment device 10 is provided at the other end of the metal through pipe. Through the buffer silo 5 and the metering screw 6, powder filling with a certain accuracy can be achieved, and a pressure sensor 51 is installed under the buffer silo 5 to further improve the accuracy of the metering device. The display screen 9 is touch-sensitive and displays various information of the metering device. A variety of data are preset and can be changed and modified at any time. The entire hopper 1 can be disassembled and assembled, and no special tools are required for cleaning, which is very convenient. Through the slide rail 41 and the mounting seat 4, the position and angle of the metering device can be flexibly adjusted to adapt to different products.

[0031] like Figure 1-3 As shown, the connecting device 7 includes a first connecting portion 71, a second connecting portion 72 and a third connecting portion 73. A transmission mechanism is arranged in the first connecting portion 71. The first connecting portion 71 is fixed with the second connecting portion 72 by bolts. A limiting device 721 is fixedly installed on one side of the second connecting portion 72 close to the hopper 1. A plurality of positioning holes are evenly spaced on both sides of the second connecting portion 72. The limiting device 721 includes an upper portion and a lower portion. The upper portion is provided with a through groove and a through hole. A positioning hole is arranged at the bottom end of the upper portion. The lower portion is inserted into the positioning hole at the bottom end of the upper portion. Through holes are evenly arranged on the periphery of the top cover 11. The top cover 11 is fixed with bolts to the upper portion. The second connecting portion 72 is fixed with bolts to the third connecting portion 73. The third connecting portion 73 is fixed with bolts. Part 73 is assembled by a first limit block 731, a second limit block 732, a fixed beam 733, a connecting part body 734, a third limit block 735 and a fourth limit block 736. A through hole is provided on the fourth limit block 736, and a positioning hole is provided on the top of the mounting seat 4. The positioning hole is coaxially arranged with the through hole of the fourth limit block 736, and a positioning screw is arranged in the through hole. The connecting device 7 itself is connected to the hopper 1 top cover 11 and the mounting seat 4, and is composed of three connecting parts. The height and angle of the device can be adjusted through the limit blocks, fixed beams 733 and positioning holes on these three connecting parts. The hopper 1 can also be easily disassembled when it is necessary to clean it, and the height adjustment mainly depends on the positioning screw.

[0032] Specific implementation process:

[0033] First, ensure that the device is powered on. After the feeding system transports the powder material into the hopper 1, observe the height of the powder material through the PC part above the hopper 1. When it meets the requirements, the display screen 9 on the motor control terminal 8 starts the metering device. Under the control of the PLC, the shaft of the motor 2 rotates and drives the metering screw 6 to rotate through the transmission belt. The agitator keeps the density of the powder material uniform. The metering screw 6 transports the powder material to the buffer silo 5 during rotation. The pressure sensor 51 set under the buffer silo 5 can accurately weigh the powder material inside. Then, the powder material will go down along the discharge pipe 3 as the metering screw 6 rotates until it enters the filling bag. In the embodiment, the connecting device 7 can play a connecting role between the top cover 11 and the mounting seat 4. While fixing the two, the height between the metering device and the filling bags of different sizes can be adjusted by adjusting the positions of the first connecting part 71, the second connecting part 72 and the third connecting part 73 in the connecting device 7. Without removing the connecting device 7, the height of the connecting device 7 can be adjusted by the positioning screw arranged at the middle position of the top of the mounting seat 4, and the angle of the metering device can be adjusted by rotating the fixed crossbeam 733. When adjusted to a suitable angle, the metering device can start filling and accurately control the weight of each filling to ensure that it is within a preset range.

[0034] In the embodiments disclosed in the present invention, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connect" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the embodiments disclosed in the present invention can be understood according to specific circumstances.

[0035] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A high-precision metering device for a powder packaging machine, comprising a hopper (1), a motor (2), a discharge pipe (3), a mounting base (4), a buffer bin (5) and a metering screw (6), characterized in that: The hopper (1) is assembled from a top cover (11), a shell (12), and a feeding bin (13); a buffer bin (5) is provided at the discharge port of the feeding bin (13); a discharge pipe (3) is provided at the bottom end of the buffer bin (5); and a pressure sensor (51) is provided between the discharge pipe (3) and the buffer bin (5); A connecting device (7) is provided on the top cover (11) of the hopper (1), a motor (2) is provided at the top end of the connecting device (7), a rotating shaft of the motor (2) is transmission-connected to a metering screw (6) via a transmission mechanism, and the metering screw (6) is coaxially arranged with a discharge pipe (3); A slide rail (41) is provided on the mounting seat (4), and the mounting seat (4) is slidably connected to the connecting device (7).

2. A high-precision metering device for a powder packaging machine according to claim 1, characterized in that: The connecting device (7) comprises a first connecting part (71), a second connecting part (72) and a third connecting part (73); a transmission mechanism is arranged in the first connecting part (71); and the first connecting part (71) and the second connecting part (72) are fixed by bolts.

3. A high-precision metering device for a powder packaging machine according to claim 2, characterized in that: A limiting device (721) is fixedly mounted on one side of the second connecting portion (72) close to the hopper (1), and a plurality of positioning holes are arranged at equal intervals on both sides of the second connecting portion (72).

4. A high-precision metering device for a powder packaging machine according to claim 3, characterized in that: The limiting device (721) comprises an upper part and a lower part, the upper part is provided with a through groove and a through hole, the bottom end of the upper part is provided with a positioning hole, the lower part is inserted into the positioning hole at the bottom end of the upper part, the periphery of the top cover (11) is evenly provided with through holes, and the top cover (11) is fixed to the upper part by bolts.

5. A high-precision metering device for a powder packaging machine according to claim 4, characterized in that: The second connection part (72) is bolted and fixed to the third connection part (73); the third connection part (73) is assembled from a first limit block (731), a second limit block (732), a fixed cross beam (733), a connection part body (734), a third limit block (735) and a fourth limit block (736); a through hole is provided on the fourth limit block (736); a positioning hole is provided at the top end of the mounting seat (4); the positioning hole is coaxially arranged with the through hole of the fourth limit block (736); a positioning screw is provided in the through hole.

6. A high-precision metering device for a powder packaging machine according to claim 1, characterized in that: A metal pipeline is arranged on the mounting seat (4), a control terminal (8) is arranged at the other end of the metal pipeline, and a display screen (9) is arranged on the control terminal (8).

7. A high-precision metering device for a powder packaging machine according to claim 1, characterized in that: A metal through-tube is provided at one end of the top cover (11), and a detachably mounted air pressure adjustment device (10) is provided at the other end of the metal through-tube.

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