Cellulose ether packaging system

Abstract

The utility model relates to cellulose ether production technical field, concretely relates to a cellulose ether packing system, include: packing bin, for storing cellulose ether finished product material, discharge channel, the intercommunication packing bin for sending out the material in packing bin, valve port packing bag, including packing bag ontology and valve port part, valve port part is used for connecting discharge channel, control valve, locates at discharge channel department, is used for opening and closing discharge channel, negative pressure device, including negative pressure mouth, negative pressure mouth is located at discharge channel department and corresponds valve port part, to suck the air in valve port packing bag, through negative pressure device sucking the air in valve port packing bag, to make valve port packing bag in the loading process not to need to depend on self air permeability to discharge air, can choose the valve port packing bag of low air permeability rate to improve the moisture-proof performance of valve port packing bag, avoid the material in valve port packing bag to absorb moisture and cake.

Description

Technical Field

[0001] This utility model relates to the field of cellulose ether production technology, and specifically to a cellulose ether packaging system. Background Technology

[0002] The final step in cellulose ether production is packaging the finished product into bags for subsequent transportation and sale. Generally, cellulose ether is packaged according to certain weight standards, such as 25 kilograms per bag, to achieve standardized packaging.

[0003] Currently, most manufacturers use valve bag packaging machines. These machines use impellers or pneumatic devices to feed materials into valve-sealed bags. Once the preset weight is reached, feeding stops, and the bag is sealed, completing one packaging cycle. During the material feeding process, air continuously enters the valve-sealed bag, requiring constant air expulsion to prevent breakage. High-permeability valve bags are generally chosen to allow air to escape during feeding. However, after packaging, the high permeability can cause the cellulose ether material inside to absorb moisture, leading to clumping, affecting usability, increasing the risk of customer returns, and resulting in economic losses. Utility Model Content

[0004] The purpose of this invention is to provide a cellulose ether packaging system that solves the problem that while the high air permeability of valve-mouth packaging bags prevents breakage during filling, it also leads to easy moisture absorption and material clumping. By using a negative pressure device to draw air out of the valve-mouth packaging bag, the bag does not need to rely on its own air permeability to expel air during the filling process. Valve-mouth packaging bags with low air permeability can be selected, thereby improving the moisture-proof performance of the valve-mouth packaging bag and preventing the material inside the bag from absorbing moisture and clumping.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a cellulose ether packaging system, comprising: a packaging silo for storing finished cellulose ether materials; a discharge channel connected to the packaging silo for discharging the materials from the packaging silo; a valve-sealed packaging bag, comprising a bag body and a valve opening, the valve opening being connected to the discharge channel; a control valve located at the discharge channel for opening and closing the discharge channel; and a negative pressure device, comprising a negative pressure nozzle located at the discharge channel and corresponding to the valve opening, for drawing air from the valve-sealed packaging bag.

[0006] In one embodiment, a weighing device is also included for weighing the valve-mouth packaging bag to obtain a real-time weight.

[0007] In one embodiment, the device further includes a controller, wherein the control valve, the negative pressure device, and the weighing device are all electrically connected to the controller. The controller has a preset target weight, and the controller controls the opening and closing of the control valve and the start and stop of the negative pressure device based on the real-time weight and the target weight.

[0008] In one embodiment, the controller is pre-programmed with a node weight, a first control program, and a second control program. The node weight is lower than the target weight. When the real-time weight is lower than the node weight, the controller controls the control valve to remain open and the negative pressure device to remain closed based on the first control program. When the real-time weight reaches the node weight, the controller controls the control valve and the negative pressure device to open and close alternately based on the second control program, so that feeding and suction are performed alternately.

[0009] In one embodiment, the packaging hopper is equipped with a pressurizing device that applies positive pressure to the packaging hopper so that the material inside the packaging hopper is transported outward by compressed air.

[0010] In one embodiment, the discharge channel includes an adjustment section and a connecting section, the control valve is located at the adjustment section to control the opening and closing of the adjustment section, and the connecting section is used to connect to the valve port packaging bag.

[0011] In one embodiment, the control valve is a scissor valve, which is configured to control the opening and closing of the regulating section.

[0012] In one embodiment, the packaging bag body is an aluminum-plastic composite bag, an aluminized film composite bag, or a multi-layer co-extruded film bag.

[0013] In one embodiment, the negative pressure device includes a vacuum generator connected to the negative pressure nozzle, the vacuum generator drawing air through the negative pressure nozzle.

[0014] The advantages of this application compared to the prior art are: This application provides a cellulose ether packaging system. During the process of feeding the finished cellulose ether material from the packaging silo into the valve-sealed packaging bag through the discharge channel, the negative pressure device can be controlled to draw in air based on the actual situation of the valve-sealed packaging bag being inflated by air, thus timely expelling the air from the packaging bag and preventing it from breaking. This allows the valve-sealed packaging bag to be made of a highly airtight material with low permeability and moisture absorption, preventing the stored material from absorbing moisture and clumping, thereby reducing economic losses. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a general schematic diagram of a cellulose ether packaging system according to an embodiment of this application; Figure 2 A graph showing the changes in the weight and internal air pressure of the valve-sealed packaging bag during the use of the cellulose ether packaging system; Figure 3 This is a graph showing the changes in weight and internal air pressure of a valve-mouthed packaging bag when it is filled with materials, as shown in the prior art. Detailed Implementation

[0017] The terms “first,” “second,” “third,” etc., are used only for distinguishing descriptions and do not indicate a sequence number, nor should they be interpreted as indicating or implying relative importance.

[0018] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0019] In the description of this application, it should be noted that the terms "inner", "outer", "left", "right", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element 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 this application.

[0020] In the description of this application, unless otherwise expressly specified and limited, the terms “set up,” “install,” “connect,” and “link” shall be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; as a direct connection or an indirect connection through an intermediate medium; or as a connection within two components.

[0021] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings.

[0022] Please refer to Figure 1 The diagram shows an overall schematic of a cellulose ether packaging system according to an embodiment of this application.

[0023] like Figure 1 According to an embodiment of this application, a cellulose ether packaging system includes: a packaging silo for storing finished cellulose ether material; a discharge channel connected to the packaging silo for discharging the material from the packaging silo; a valve-type packaging bag, including a bag body and a valve portion, the valve portion being connected to the discharge channel; a control valve located at the discharge channel for opening and closing the discharge channel; and a negative pressure device including a negative pressure nozzle located at the discharge channel and corresponding to the valve portion to draw air from the valve-type packaging bag.

[0024] In this embodiment of the cellulose ether packaging system, the packaging silo is used to store the finished cellulose ether material. After the cellulose ether undergoes the production process, the finished material is stored in the finished product silo. When packaging is required, the material to be packaged is added to the packaging silo, and then the packaging system is used for bagging. The packaging silo is connected to the discharge channel, which is connected to the valve-sealed packaging bag. The packaging process involves the packaging silo conveying the stored material to the valve-sealed packaging bag through the discharge channel. When the weight of the material in the valve-sealed packaging bag reaches the required level, the packaging silo stops feeding, and the valve-sealed packaging bag is sealed. Then, a new valve-sealed packaging bag is connected to the discharge channel through the valve to package the next batch of material.

[0025] Materials are typically fed into valve-sealed packaging bags via impellers or pneumatic devices. During this process, air continuously enters the bag along with the material. When the bag contains a small amount of material, the space for air entry is relatively large, reducing the risk of the bag bursting open. However, as the bag becomes fuller, the space for air entry decreases, especially when it is nearly full. The limited space prevents air from escaping through the valve opening and the vents on the bag itself, increasing the risk of the bag bursting open. Current technology typically uses valve-sealed packaging bags with high permeability to prevent breakage during filling, allowing air to escape through the vents. However, this also increases the bag's moisture absorption, making the material inside prone to absorbing moisture and clumping.

[0026] The cellulose ether packaging system in this embodiment also includes a control valve and a negative pressure device. The control valve is located at the discharge channel and is used to open and close the discharge channel. The difference from the prior art is that in the prior art, when filling a valve-opening packaging bag, the packaging hopper continuously feeds material out through an impeller or pneumatic device. During the filling process of the current valve-opening packaging bag, the impeller or pneumatic device continuously operates. Figure 3The graph shows the changes in the weight of the packaging bag at the valve opening and the internal air pressure during the process. If intermittent feeding is required to allow time for the air inside the packaging bag at the valve opening to be expelled, it would be necessary to frequently start and stop the impeller or air pressure device. However, in this embodiment, the opening and closing of the discharge channel can be directly controlled by the valve, thereby achieving intermittent discharge. The impeller or air pressure device can always be kept on, saving time intervals and reducing the probability of damage to the impeller or air pressure device.

[0027] The negative pressure device in this embodiment includes a negative pressure nozzle, which is located at the discharge channel and corresponds to the valve opening to draw air from the valve opening packaging bag. During the process of feeding material from the packaging hopper into the valve opening packaging bag through the discharge channel, the negative pressure device can be controlled to draw air based on the actual situation of the valve opening packaging bag being inflated by air, so as to timely expel the air from the valve opening packaging bag and prevent the valve opening packaging bag from breaking. Regarding the timing of activating the negative pressure device, for example, when the material in the valve opening packaging bag is filled to 50% (or a point above 50%) of the target weight, the air in the valve opening packaging bag has a high probability of causing it to burst, in which case the negative pressure device is activated to draw air. Regarding the specific operation of the negative pressure device, it can be activated while the control valve remains open to continuously feed material from the packaging hopper into the valve opening packaging bag, allowing the negative pressure device to draw air while the valve opening packaging bag is being filled with material, thus improving efficiency. However, the negative pressure device may suck in material. Therefore, when the negative pressure device is activated, the control valve can be closed to stop feeding. After some air is sucked out, the negative pressure device can be closed and the control valve reopened to resume feeding. This cycle is repeated to allow the control valve and negative pressure device to operate intermittently, avoiding the air from tearing the valve-mouth packaging bag. Furthermore, this embodiment uses the suction effect of the negative pressure device to expel air from the valve-mouth packaging bag, without relying on the bag's own permeability. Therefore, the valve-mouth packaging bag in this cellulose ether packaging system can be made of a highly airtight material with low permeability and moisture absorption, preventing the stored material from absorbing moisture and clumping, thus reducing economic losses.

[0028] Preferably, in one embodiment of this application, the cellulose ether packaging system further includes a weighing device for weighing the valve-sealed packaging bags to obtain their real-time weight. Each packaging operation involves filling and sealing one valve-sealed packaging bag. Generally, the weight of the material in each package follows a standard to achieve standardized packaging, for example, each bag weighs 25 kg. Therefore, in this embodiment, the weighing device is used to weigh the valve-sealed packaging bags to obtain their real-time weight during the filling process, thereby stopping feeding when the weight reaches the standard target weight, ensuring that the weight of each bag meets the standard.

[0029] Preferably, in one embodiment of this application, the cellulose ether packaging system further includes a controller. The control valve, the negative pressure device, and the weighing device are all electrically connected to the controller. The controller has a preset target weight. Based on the real-time weight and the target weight, the controller controls the opening and closing of the control valve and the start and stop of the negative pressure device. In this embodiment, the controller has a preset target weight (i.e., the standard weight of each bag of material, for example, 25 kg), and the controller can obtain the real-time weight of the valve-mouth packaging bag detected by the weighing device. When the controller determines that the real-time weight has reached the target weight, it sends a control signal to the control valve to close the control valve and stop feeding. Furthermore, the controller can also control the negative pressure device based on the real-time weight. For example, when the real-time weight reaches a certain level, posing a significant risk of the air in the valve-mouth packaging bag causing it to burst, a signal can be sent to the negative pressure device to activate and draw air from the valve-mouth packaging bag.

[0030] Preferably, in one embodiment of this application, the controller is pre-programmed with a node weight, a first control program, and a second control program. The node weight is lower than the target weight. When the real-time weight is lower than the node weight, the controller controls the control valve to remain open and the negative pressure device to remain closed based on the first control program. When the real-time weight reaches the node weight, the controller controls the control valve and the negative pressure device to open and close alternately based on the second control program, so that feeding and suction are performed alternately.

[0031] Please refer to Figure 2 This diagram illustrates the changes in the weight and internal air pressure of the valve-mouth packaging bag during the use of the cellulose ether packaging system in this embodiment. In this embodiment, the controller has a preset node weight, which is lower than the target weight, for example, the target weight is 25 kg and the node weight is 23 kg. When the real-time weight of the valve-mouth packaging bag is lower than the node weight, the material inside the bag has not reached 23 kg, so there is still some space inside the bag to accommodate air. The air can flow within it and overflow when it has the opportunity. At this time, the air pressure inside the bag is approximately lower than 45 kPa, and the risk of the bag breaking due to air pressure is relatively low. Therefore, when the controller determines that the real-time weight is lower than the node weight (23 kg), the controller uses the first control program to control the control valve and the negative pressure device. Specifically, the control valve remains open, and the negative pressure device remains closed, allowing the packaging hopper to continuously feed material to the valve-mouth packaging bag without using the negative pressure device to extract air from the bag. This allows the bag to be filled quickly with low risk of breakage, improving packaging efficiency.

[0032] When the real-time weight of the valve-sealed packaging bag reaches the target weight and continues to increase with the feeding from the packaging hopper, the space available for air inside the bag becomes very small and will continue to shrink. At this point, air continues to enter the bag along with the material, causing the air pressure inside to exceed 45 kPa and continue to increase, significantly increasing the risk of the bag bursting due to air pressure. Therefore, when the controller determines that the real-time weight has reached the target weight (23 kg), it uses a second control program to control the control valve and the negative pressure device. Specifically, the control valve and the negative pressure device are alternately opened and closed; that is, they are opened intermittently with staggered opening times. When the control valve is open to feed material, the negative pressure device is closed; when the control valve is closed to interrupt feeding, the negative pressure device is opened to draw in air. This alternation of feeding and air intake causes the material inside the valve-sealed packaging bag to increase intermittently until the real-time weight reaches the target weight. Specifically, when the real-time weight reaches 23 kg, continued feeding will cause the air pressure inside the valve-sealed packaging bag to exceed 45 kPa and continue to increase. Therefore, continuous feeding is not possible. Feeding must be interrupted immediately after a short period (e.g., the control valve is open for 3 seconds) and air is drawn in (e.g., the negative pressure device is opened for 2 seconds) to reduce the air pressure. Once the air pressure drops to a certain level (e.g., to 10 kPa), the negative pressure device is closed to stop air drawing. This process is repeated until the weight of the valve-sealed packaging bag reaches the target weight. During this process, the second control program alternately opens and closes the negative pressure device and the control valve, ensuring that the air pressure remains below 45 kPa during each short feeding period, preventing the packaging bag from bursting due to excessive air pressure.

[0033] Preferably, the packaging material hopper is equipped with a pressurization device that applies positive pressure to the hopper, causing the material inside to be transported outward by compressed air. Once activated, the pressurization device can pneumatically convey the material within the hopper using 50 kPa compressed air.

[0034] Preferably, in one embodiment of this application, the discharge channel includes an adjusting section and a connecting section. The control valve is located at the adjusting section to control its opening and closing. The connecting section is used to connect with the valve-mouth packaging bag. In this embodiment, the adjusting section and the connecting section are arranged sequentially from the packaging hopper to the valve-mouth packaging bag and connected to form the discharge channel. The control valve is located at the adjusting section. When the control valve is open, the adjusting section allows material to pass through. When the control valve is closed, the adjusting section is shut off to interrupt the material feeding. The connecting section is used to connect with the valve opening of the valve-mouth packaging bag, so that the discharge channel corresponds to and connects with the valve-mouth packaging bag to deliver material into the valve-mouth packaging bag.

[0035] Preferably, in this embodiment, the control valve is a scissor valve, which is configured corresponding to the regulating section to control its opening and closing. The scissor valve is located around the regulating section. When the scissor valve is closed, it clamps the regulating section, causing deformation and shutting off the internal channel, thus blocking the material flow path and interrupting feeding. When the scissor valve is opened, the regulating section is no longer clamped and returns to its original shape, opening its internal channel and allowing material to pass through. In some embodiments, the control valve is controlled by a controller, using a scissor valve to open and close the regulating section. This allows for rapid switching and quick control within a short time, precisely controlling the amount of material and air entering the packaging bag at the valve opening, preventing excessive air intake and increased risk of bag breakage.

[0036] Preferably, in one embodiment of this application, the packaging bag body is an aluminum-plastic composite bag, an aluminized film composite bag, or a multi-layer co-extruded film bag, which has strong sealing performance to reduce air permeability and improve moisture resistance. Specifically, the aluminum-plastic composite bag uses an outer layer (PET / nylon), a middle layer (aluminum foil), and an inner layer (PE / CPP); the aluminized film composite bag uses an outer layer (PET with aluminum plating or CPP with aluminum plating) and an inner layer (PE); and the multi-layer co-extruded film bag uses EVOH (ethylene-vinyl alcohol copolymer) and PE / PP multi-layer composite.

[0037] Preferably, in one embodiment of this application, the negative pressure device includes a vacuum generator connected to the negative pressure nozzle, which draws air through the negative pressure nozzle. In use, the vacuum generator is activated to create negative pressure at the negative pressure nozzle, thereby drawing air from the packaging bag at the valve opening and expelling the air. Further, the negative pressure device may also include a dust collector connected to the vacuum generator to absorb dust from the air.

[0038] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A cellulose ether packaging system, characterized in that, include: Packaging silos are used to store finished cellulose ether materials. The discharge channel is connected to the packaging material hopper and is used to discharge the materials in the packaging material hopper; A valve-mouth packaging bag includes a packaging bag body and a valve opening, wherein the valve opening is used to connect to the discharge channel; A control valve is located at the discharge channel and is used to open and close the discharge channel; A negative pressure device includes a negative pressure nozzle, which is located at the discharge channel and corresponds to the valve port to draw air from the packaging bag at the valve port.

2. The cellulose ether packaging system according to claim 1, characterized in that, It also includes a weighing device for weighing the valve-mouth packaging bag to obtain the real-time weight.

3. A cellulose ether packaging system according to claim 2, characterized in that, It also includes a controller, and the control valve, the negative pressure device, and the weighing device are all electrically connected to the controller. The controller has a preset target weight, and the controller controls the opening and closing of the control valve and the start and stop of the negative pressure device based on the real-time weight and the target weight.

4. A cellulose ether packaging system according to claim 1, characterized in that, The packaging hopper is equipped with a pressurization device that applies positive pressure to the packaging hopper so that the material inside the packaging hopper is transported outward by compressed air.

5. A cellulose ether packaging system according to claim 1, characterized in that, The discharge channel includes an adjustment section and a connecting section. The control valve is located at the adjustment section to control the opening and closing of the adjustment section. The connecting section is used to connect to the valve port packaging bag.

6. A cellulose ether packaging system according to claim 5, characterized in that, The control valve is a scissor valve, which is set in relation to the regulating section to control the opening and closing of the regulating section.

7. A cellulose ether packaging system according to claim 1, characterized in that, The packaging bag body is an aluminum-plastic composite bag, an aluminized film composite bag, or a multi-layer co-extruded film bag.

8. A cellulose ether packaging system according to claim 1, characterized in that, The negative pressure device includes a vacuum generator connected to the negative pressure nozzle, which draws air through the negative pressure nozzle.

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