A bag opening mechanism

Abstract

The utility model discloses a bag mouth propping open mechanism relates to material feeding equipment technical field, and this mechanism includes hollow center axis, support, connecting rod, arc plate, the cap of gas hole, and center axis can along the telescopic of sleeve pipe of filter basket bottom axial, is driven arc plate radial expansion or contraction through transmission mechanism, realizes the automatic propping open and closing of bag mouth, and arc plate is adapted with filter basket inner wall, ensures that the sealing is reliable when propping open, and hollow center axis and the gas hole cooperation of cap blow -off system can blow into the airflow to the bag in order to fluidize powder material and clean residual, the utility model discloses realized the automation operation of bag mouth, has promoted the sealing performance and feeding efficiency, has reduced the dust leakage and raw material waste.

Description

Technical Field

[0001] This utility model relates to the field of material feeding equipment technology, specifically to a bag opening mechanism used in the process of feeding bagged powder. Background Technology

[0002] In the feeding operation of bagged powders (such as PTA powder), the bag opening needs to be opened to allow the powder to be discharged smoothly. In existing technologies, opening the bag opening mostly relies on manual operation or simple mechanical structures: manual opening is labor-intensive, inefficient, and prone to dust leakage; traditional mechanical opening mechanisms often use rigid clamping structures, which suffer from uneven opening force and poor bag sealing, resulting in powder residue or leakage, causing not only material waste but also pollution of the working environment. Furthermore, existing mechanisms lack a coordinated design with a purging system, making it impossible to effectively clean residual powder inside the bag during the opening process, further reducing feeding efficiency and cleanliness. Utility Model Content

[0003] In view of the problems of low automation, poor sealing effect and inability to clean residual powder in the existing bag opening mechanism, this utility model aims to provide a bag opening mechanism that realizes automatic and stable opening and closing of the bag opening, improves sealing performance, and removes residual powder with the blowing function, thereby improving feeding efficiency and the cleanliness of the working environment.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0005] This utility model discloses a bag opening mechanism, including a sleeve and a cylindrical filter basket. The sleeve extends vertically and is connected to the filter basket. It also includes a central shaft that can move vertically and can pass through the sleeve. A second support is sleeved on the upper end of the central shaft. An upper support and a lower support are spaced apart vertically on the sleeve. Multiple sets of transmission mechanisms are connected between the second support, the upper support, and the lower support. The vertical movement of the central shaft drives the transmission mechanisms to expand or contract to open or close the bag opening.

[0006] Preferably, each transmission mechanism includes a connecting rod, an arc-shaped plate, a first swing rod, and a second swing rod. The upper end of the connecting rod is hinged to the second support, and the lower end of the connecting rod, the upper end of the arc-shaped plate, and the upper end of the first swing rod are hinged together. The lower end of the first swing rod is hinged to the upper support, the lower end of the arc-shaped plate is hinged to the upper end of the second swing rod, and the lower end of the second swing rod is hinged to the lower support. The connecting rod is driven by the up-and-down movement of the central shaft to expand or contract the arc-shaped plate to open or close the bag opening.

[0007] Preferably, the transmission mechanism is provided in four groups, with the connecting rods in the four groups of transmission mechanisms equally spaced around the second support; the first swing rod in the four groups of transmission mechanisms equally spaced around the first upper support; the second swing rod in the four groups of transmission mechanisms equally spaced around the first lower support; and the hinge points on the second support, the first upper support, and the first lower support in each group of transmission mechanisms are located on a line to achieve vertical alignment.

[0008] Preferably, the central shaft is a hollow structure, with a cap with air holes fixedly connected to its top end. The hollow structure of the central shaft is connected to the purge pipeline, and the air holes are evenly distributed around the cap to blow air into the bag.

[0009] Beneficial effects:

[0010] Automated opening and sealing: The bag opening is automatically opened and closed through a four-bar linkage mechanism, replacing manual operation and reducing labor intensity; the tight fit between the arc plate and the inner wall of the filter basket ensures a sealed bag opening, effectively preventing dust leakage.

[0011] Residual powder cleaning: The hollow central shaft and air hole design work together with the blowing system to blow air into the bag, which can both fluidize the powder and accelerate its discharge, and thoroughly remove residues, reducing raw material waste.

[0012] Stable and reliable structure: The detachable support design facilitates maintenance, the four-bar linkage structure ensures smooth power transmission, and the adaptable design of the arc plate improves the stability and sealing of the opening process. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the bag opening mechanism of this utility model.

[0014] Figure 2 This is a top view of the bag opening mechanism of this utility model.

[0015] Figure 3 This is a schematic diagram of the bag opening mechanism of this utility model installed in the filter basket.

[0016] Figure 4 This is a schematic diagram of the filter basket structure of this utility model.

[0017] Figure 5 This is a schematic diagram of the top structure of the central shaft of this utility model. Detailed Implementation

[0018] The following will refer to the appendix in the embodiments of this utility model. Figure 1-5The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] In the description of the utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] The invention relates to a bag opening mechanism comprising a central shaft 7.1, an upper support 1, a lower support 1 7.2, a second support 2 7.3, a connecting rod 7.4, an arc-shaped plate 7.5, a cap 7.6, and an air hole 7.7, the specific structure of which is as follows:

[0022] The central shaft 7.1 is hollow and serves as the driving core of the mechanism. It can extend and retract axially along the sleeve 5.2 in the filter basket 5.1. The top of the shaft is fixedly connected to the cap 7.6, and the outer side is equipped with a detachable support 7.3. The hollow interior is connected to the purge pipeline 8 for conveying the purified gas.

[0023] Supports and connecting rods: The upper end of the connecting rod 7.4 is hinged to the second support 7.3. The lower end of the connecting rod 7.4, the upper end of the arc plate 7.5, and the upper end of the first swing rod are hinged together. The lower end of the first swing rod is hinged to the upper support. The lower end of the arc plate 7.5 is hinged to the upper end of the second swing rod. The lower end of the second swing rod is hinged to the lower support 7.2, forming a four-bar linkage mechanism to achieve stable power transmission.

[0024] Arc plate and cap: The arc of the arc plate 7.5 is adapted to the inner wall of the filter basket 5.1 to ensure that it can fit tightly with the inner wall of the filter basket 5.1 when expanding; the cap 7.6 is fixed to the top of the central shaft 7.1, and the surface is provided with evenly distributed air holes 7.7 along the circumference, which are used to blow the gas conveyed by the central shaft 7.1 into the bag to fluidize the powder or clean the residue.

[0025] Working principle: When the central shaft 7.1 retracts downward along the sleeve 5.2, it drives the second support 7.3 to move downward. Through the connecting rod 7.4, the arc-shaped plate 7.5 expands radially outward until it fits tightly against the inner wall of the filter basket 5.1, thus reliably opening and sealing the bag opening. When the central shaft 7.1 extends upward, the second support 7.3 moves upward, and the connecting rod drives the arc-shaped plate 7.5 to retract radially, releasing the bag opening and allowing it to detach from the inner wall of the filter basket 5.1, achieving closure. At the same time, the gas inside the central shaft 7.1 can be blown into the bag through the air hole 7.7 of the cap 7.6, fluidizing the powder during the feeding process and promoting discharge, and thoroughly blowing away residual powder in the later stage of feeding.

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] The bag opening mechanism of this utility model is set inside the filter basket 5.1, specifically including a central shaft 7.1, an upper support 1, a lower support 1 7.2, a support 2 7.3, a connecting rod 7.4, an arc plate 7.5, a cap 7.6, and an air hole 7.7.

[0028] The central shaft 7.1 is made of stainless steel hollow tube with a diameter that matches the inner diameter of the sleeve 5.2 at the bottom of the filter basket 5.1. It can freely extend and retract along the axial direction of the sleeve 5.2. Its top end is connected to the cap 7.6 by a thread. The support 7.3 is fixed on the central shaft 7.1 by bolts. The central shaft 7.1 is connected to the purging pipeline 8.

[0029] Supports and connecting rods: Upper support 1 and lower support 1 7.2 are two cast iron hinged fulcrum seats, symmetrically fixed to sleeve 5.2 by bolts, which can be quickly disassembled and replaced; support 2 7.3 is a rectangular steel plate, which is hinged to one end of four connecting rods 7.4 by pins. The lower end of connecting rod 7.4, the upper end of arc plate 7.5, and the upper end of swing rod No. 1 are hinged together. The lower end of swing rod No. 1 is hinged to upper support 1. The lower end of arc plate 7.5 is hinged to the upper end of swing rod No. 2. The lower end of swing rod No. 2 is hinged to lower support 1 7.2.

[0030] Arc plate and cap: Arc plate 7.5 is formed by bending two cold-rolled steel plates. The arc is consistent with the arc of the inner wall of filter basket 5.1. The inner side is lined with a rubber pad to enhance the sealing. Cap 7.6 is a cylindrical plastic part with four 3mm diameter air holes 7.7 evenly opened on the surface along the circumference, which are connected to the hollow channel of the central shaft 7.1.

[0031] Operating process: If the cylinder drives the central shaft 7.1 to retract downwards, the support 7.3 will move downwards accordingly, and the four connecting rods will move in unison, pushing the arc-shaped plate 7.5 to expand radially outwards until it is tightly fitted against the inner wall of the filter basket 5.1, pressing and sealing the bag opening; Figure 1 The dashed lines representing link 7.4, arc plate 7.5, rocker arm number one, and rocker arm number two indicate that this linkage mechanism is in a downward expansion state.

[0032] During the feeding process: the purging pipeline 8 introduces gas into the bag through the central shaft 7.1, and blows it out through the air hole 7.7 to fluidize the powder; after the feeding is completed, the central shaft 7.1 extends upward, the support 2 7.3 moves upward, the connecting rod 7.4 drives the arc plate 7.5 to contract, and the bag mouth separates from the inner wall of the filter basket 5.1 to complete the closure.

[0033] Finally, it should be noted that this utility model is not limited to the above embodiments, and many variations are possible. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.

Claims

1. A bag opening mechanism, comprising a sleeve (5.2) and a cylindrical filter basket (5.1), wherein the sleeve (5.2) extends vertically and is connected within the filter basket (5.1), characterized in that, It also includes a central shaft (7.1) that can move up and down and can be inserted into the sleeve (5.2). The upper end of the central shaft (7.1) is sleeved with a second support (7.3). The sleeve (5.2) is sleeved with an upper support and a lower support (7.2) that are spaced apart. Multiple sets of transmission mechanisms are connected between the second support (7.3), the upper support, and the lower support (7.2). The transmission mechanisms are driven to expand or contract to open or close the bag opening by moving the central shaft (7.1) up and down.

2. A bag opening mechanism according to claim 1, wherein Each transmission mechanism includes a connecting rod (7.4), an arc plate (7.5), a first swing rod, and a second swing rod. The upper end of the connecting rod (7.4) is hinged to the second support (7.3). The lower end of the connecting rod (7.4), the upper end of the arc plate (7.5), and the upper end of the first swing rod are hinged together. The lower end of the first swing rod is hinged to the first upper support. The lower end of the arc plate (7.5) is hinged to the upper end of the second swing rod. The lower end of the second swing rod is hinged to the first lower support (7.2). The connecting rod (7.4) is driven to expand or contract the arc plate (7.5) by moving up and down through the central shaft (7.1) to open or close the bag opening.

3. A bag opening mechanism according to claim 2, wherein The transmission mechanism is provided in four sets, and the connecting rods (7.4) in the four sets of transmission mechanisms are equally spaced around the support (7.3); The first swing arm in the four transmission mechanisms is equally spaced around the upper support 1; the second swing arm in the four transmission mechanisms is equally spaced around the lower support 1 (7.2); and the hinge points on the second support 2 (7.3), the upper support 1, and the lower support 1 (7.2) in each transmission mechanism are located on a line to achieve vertical alignment.

4. A bag opening mechanism according to claim 1, wherein The central shaft (7.1) is a hollow structure, and a cap (7.6) with air holes (7.7) is fixedly connected to the top end. The hollow structure of the central shaft (7.1) is connected to the purge pipeline (8). The air holes (7.7) are evenly distributed around the cap (7.6) and are used to blow air into the bag.

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