Plant fiber pulp suction control device and control method

Abstract

The invention provides a plant fiber pulp suction control device and method.The control device is internally provided with one or more cavities, and the cavities are connected with external vacuum equipment through vacuum pipelines and connected with external air compression equipment through air compression pipelines; the control device is further provided with a detection unit and an adjusting unit so as to control the flow and / or pressure in the cavity. The requirements of wall thickness, strength, density and the like of a product can be met, and when multiple cavities exist, the requirements of wall thickness, strength, density and the like of a designated area can be met; compared with traditional paper-plastic equipment, when the pressure and the flow in the forming process are suddenly high and suddenly low, the flow and the pressure in the forming process can be detected and adjusted in real time, then the consistency of products is guaranteed, the product percent of pass of the paper-plastic containers is improved, and market requirements are greatly met.

Description

Technical Field

[0001] The present application belongs to the technical field of plant fiber slurry suction, and in particular, to a plant fiber slurry suction control device and control method. Background Art

[0002] The traditional paper-plastic slurry suction technology only has the opening and closing valve body. It cannot detect and adjust the flow and pressure in real time during the slurry suction process. It can only meet the thickness and density required by different products by changing the style of the mold. At the same time, the special requirements for thickness and density of different parts of the product can only be met by modifying the mold, which is time-consuming and labor-intensive. In actual production, the pressure and flow in the molding process will fluctuate. Because they cannot be adjusted in real time, the output product consistency is not high. Summary of the invention

[0003] In view of this, the present application aims to propose a plant fiber slurry suction control device and control method to solve the problem that the existing equipment cannot detect and adjust the flow and pressure in real time during the slurry suction process, thereby resulting in low product consistency.

[0004] To achieve the above purpose, the technical solution of this application is implemented as follows:

[0005] In a first aspect, the present application provides a plant fiber slurry suction control device, wherein one or more cavities are provided in the control device, wherein the cavities are connected to an external vacuum device through a vacuum pipe and to an external air compressor through an air compressor pipe;

[0006] The control device is also provided with a detection unit and an adjustment unit, which cooperate with the adjustment unit to control the flow rate and / or pressure inside the cavity to complete the slurry absorption process and form a wet embryo.

[0007] The wet embryo here refers to the wet paper-plastic product formed by plant fibers.

[0008] Furthermore, the vacuum pipeline and the compressed air pipeline are provided with switch valves for controlling the switch of the pipelines;

[0009] The vacuum pipeline and / or the compressed air pipeline is provided with a regulating valve for controlling the flow rate of the pipeline;

[0010] In response to the switch valve and the regulating valve being arranged on the same pipeline, the switch valve and the regulating valve are connected in series.

[0011] Furthermore, in response to the fact that a plurality of cavities are provided in the control device, the internal gases or liquids of the plurality of cavities are not connected to each other.

[0012] Furthermore, the cavity, the vacuum pipe and the air pressure pipe are provided with pressure control valves for adjusting the pressure in the cavity.

[0013] Furthermore, the cavity is provided with a pressure detection unit for detecting the pressure in the cavity.

[0014] In a second aspect, the present application provides a plant fiber slurry suction control method using the plant fiber slurry suction control device as described in the first aspect, the control method comprising:

[0015] In response to one or more cavities, the regulating unit is controlled to operate so as to independently control the flow and / or pressure in each cavity.

[0016] Furthermore, the control method comprises:

[0017] The vacuum pipeline is provided with a switch valve and a regulating valve;

[0018] In response to the slurry suction state of the plant fiber slurry, the switch valve is controlled to be opened, and the regulating valve is controlled to be opened with a first valve opening, and the slurry is vacuum-sucked to complete the slurry suction operation;

[0019] In response to the wet embryo dehydration or transfer state, continue to control the switch valve to open, and control the regulating valve to adjust from the first valve opening to the second valve opening, so as to absorb excess moisture in the wet embryo fiber, wherein the second valve opening is not less than the first valve opening;

[0020] In response to the wet embryo being stripped or being in a non-working state, the switch valve is controlled to be closed and the regulating valve is controlled to be restored to the first valve opening, waiting for the next slurry suction instruction.

[0021] Furthermore, the control method further includes:

[0022] The air compression pipeline is provided with a switch valve;

[0023] In response to the wet embryo peeling state, controlling the switch valve to open;

[0024] In response to a non-working state, controlling the switch valve to close;

[0025] or;

[0026] The air pressure pipeline is provided with a switch valve and a regulating valve;

[0027] In response to the wet embryo peeling state, the switch valve is controlled to be opened, and the regulating valve is in a regulating control state;

[0028] In response to a non-working state, the switch valve is controlled to be closed.

[0029] Compared with the prior art, the plant fiber slurry suction control device and control method described in this application have the following beneficial effects:

[0030] The plant fiber slurry suction control device and control method described in the present application control the coordinated opening and closing of the switch valve and the regulating valve through the control method to complete the control of the slurry flow and pressure in the cavity, and realize the molding operation of the paper-plastic product (forming a wet embryo). The present application can meet the wall thickness, strength, density and other requirements of the product. When there are multiple cavities, the wall thickness, strength, density and other requirements of the specified area can be met. Compared with traditional paper-plastic equipment, when the pressure and flow in the molding process fluctuate, the flow and pressure in the molding process can be detected and adjusted in real time, thereby ensuring the consistency of the product, improving the product qualification rate of paper-plastic containers, and greatly meeting market demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0032] Figure 1 This is a schematic diagram of the overall first angle structure of the plant fiber slurry suction control device according to an embodiment of the present application;

[0033] Figure 2 This is a second angle structural schematic diagram of the overall plant fiber slurry suction control device according to an embodiment of the present application;

[0034] Figure 3 This is a schematic diagram of the internal structure of the control device described in an embodiment of the present application.

[0035] Description of reference numerals:

[0036] 1. Control device; 11. Cavity; 2. Vacuum pipe; 3. Air pressure pipe; 4. Switch valve; 5. Regulating valve; 6. Pressure regulating pipe; 7. Pressure control valve; 8. Pressure detection unit. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0039] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0040] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0041] See also Figures 1 to 3 As shown, the embodiment of the present application provides a plant fiber slurry suction control device:

[0042] The control device 1 is provided with one or more cavities 11, wherein the cavities 11 are connected to external vacuum equipment via vacuum pipes 2 and to external air compressor equipment via air compressor pipes 3;

[0043] The control device 1 is also provided with a detection unit and a regulating unit to control the flow rate and / or pressure inside the cavity 11 to cooperate with the slurry suction process to form a wet embryo.

[0044] Specifically, this embodiment connects the cavity 11 to the external vacuum equipment through the vacuum pipe 2 and the external air compressor equipment through the air compressor pipe 3, and at the same time, uses the detection unit and the adjustment unit to control the flow and / or pressure inside the cavity 11. When the paper plastic product is formed, the application can meet the requirements of the wall thickness, strength, density, etc. of the product. When there are multiple cavities, the requirements of the wall thickness, strength, density, etc. of the specified area can be met; compared with the traditional paper plastic equipment, when the pressure and flow in the forming process fluctuate, the flow and pressure in the forming process can be detected and adjusted in real time, thereby ensuring the consistency of the product, improving the product qualification rate of the paper plastic container, and greatly meeting the market demand. .

[0045] In some embodiments, the vacuum pipe 2 and the compressed air pipe 3 are provided with a switch valve 4 for controlling the switch of the pipes;

[0046] The vacuum pipe 2 and / or the compressed air pipe 3 is provided with a regulating valve 5 for controlling the flow rate of the pipe;

[0047] In response to the switch valve 4 and the regulating valve 5 being arranged on the same pipeline, the switch valve 4 and the regulating valve 5 are connected in series. The opening of the regulating valve can be adjusted before or during the wet embryo molding.

[0048] In some embodiments, in response to a plurality of cavities 11 being provided in the control device 1 , the gases or liquids inside the plurality of cavities 11 are not connected to each other.

[0049] Specifically, in order to ensure the molding of plant fibers, the internal gases or liquids of the multiple cavities 11 are kept disconnected from each other in this embodiment, and each cavity 11 corresponds to a different plant fiber molding part. Each cavity 11 is independently controlled to better meet the requirements of wall thickness, strength, and density in different areas of plant fiber molding.

[0050] This embodiment is explained by taking the upper cavity 11 and the lower cavity 11 as examples. The upper cavity 11 corresponds to the bottle body and the bottom of the paper-plastic container, and the lower cavity 11 corresponds to the bottle neck and the mouth of the paper-plastic container. The upper cavity 11 and the lower cavity 11 are respectively connected to external vacuum equipment through two independent vacuum pipes, so that a negative pressure environment is formed between the upper cavity 11 and the lower cavity 11 to achieve the suction operation of the slurry. The upper cavity 11 and the lower cavity 11 are connected to the external air compressor equipment through three independent air compressor pipes, so that a positive pressure environment is formed between the upper cavity 11 and the lower cavity 11 to achieve the stripping operation of the molded product.

[0051] It should be noted that this embodiment adopts a method of independently controlling and detecting the upper and lower hollow cavities 11. The lower cavity is responsible for controlling the flow rate and pressure of peeling and slurry suction at the container closing (bottle mouth), and the upper hollow cavity 11 is responsible for controlling the flow rate and pressure of peeling and slurry suction at the rest of the container (bottle body, bottle bottom).

[0052] In some embodiments, a pressure control valve 7 is provided on the cavity 11 , the vacuum pipe 2 , the air pressure pipe 3 and the pressure regulating pipe 6 to adjust the pressure in the cavity 11 .

[0053] Specifically, by setting a pressure control valve 7 on the cavity 11, the vacuum pipe 2, and the compressed air pipe 3, the valve body switch and the switch amount are controlled to control the internal pressure of the cavity 11. In addition, a pressure regulating pipe 6 can be connected to the cavity 1, the vacuum pipe 2, or the compressed air pipe 3, and a pressure control valve 7 can be set on the pressure regulating pipe, so that the internal pressure of the cavity 11 can also be controlled.

[0054] The pressure regulating pipe 6 described in this embodiment is integrated with the rotating shaft of the robot arm, and the interior of the rotating shaft is hollow to serve as the pressure regulating pipe 6.

[0055] In some embodiments, the cavity 11 is provided with a pressure detection unit 8 for detecting the pressure in the cavity.

[0056] Specifically, in order to realize real-time monitoring of the internal pressure of the cavity body 11, a pressure detection unit 8 is provided on the cavity body 11 in this embodiment, and the internal pressure of the cavity is reflected according to the pressure detection value of the pressure detection unit 8, so as to subsequently adjust the flow or pressure of each pipeline according to the pressure detection value.

[0057] It should be noted that the pressure detection unit 8 described in this embodiment adopts a pressure detection sensor, and utilizes the sensitive characteristics of the pressure detection sensor to realize pressure detection in the cavity 11.

[0058] In a second aspect, based on the same concept, the embodiment of the present application further provides a plant fiber slurry suction control method using the plant fiber slurry suction control device as described in the above embodiment, the control method comprising:

[0059] In response to one or more cavities 11 , the regulating unit is controlled to operate so as to independently control the flow and / or pressure in each cavity 11 .

[0060] Specifically, in this embodiment, for one or more hollow cavities 11, it is necessary to ensure that the flow rate and / or pressure in each hollow cavity 11 remain independent. For multiple hollow cavities 11, it is necessary to avoid the connection between the hollow cavities 11, which will cause gas disorder between the hollow cavities 11 and affect the completion of the slurry absorption operation of the plant fiber molding.

[0061] In some embodiments, the control method comprises:

[0062] The vacuum pipe 2 is provided with a switch valve 4 and a regulating valve 5;

[0063] In response to the slurry absorption state of the plant fiber, the switch valve 4 is controlled to be opened, and the regulating valve 5 is controlled to be opened with a first valve opening, and the slurry is vacuum-sucked to complete the slurry absorption operation;

[0064] In response to the wet embryo dehydration or transfer state, the switch valve 4 is continuously controlled to be opened, and the regulating valve 5 is controlled to be adjusted from the first valve opening to the second valve opening to absorb excess water in the wet embryo, wherein the second valve opening is not less than the first valve opening;

[0065] In response to the wet embryo stripping or non-working state, the switch valve 4 is controlled to close and the regulating valve 5 is controlled to restore to the first valve opening, waiting for the next slurry suction instruction.

[0066] It should be noted that the switch valve 4 used in the present application is used to control the on-off of the flow path, and the regulating valve 5 is used to control the flow rate of the flow path. The valves that can realize the function of the switch valve 4 include but are not limited to angle valves, ball valves, butterfly valves and other switch valves 4. The preferred scheme of this embodiment adopts angle valve control. The regulating valve 5 used in this embodiment is a stop valve, throttle valve and other regulating valves 5. The preferred scheme of this embodiment adopts stop valve control. The stop valve slowly controls the flow regulation, and the angle valve quickly responds to the flow switch. A small flow is required when sucking slurry, and a large flow is required when dehydrating. The flow change is a molding requirement. Therefore, this embodiment adopts angle valve and stop valve to cooperate to achieve it.

[0067] The angle valve and the stop valve can be automatically adjusted in real time by means of electric control or pneumatic control. The present embodiment does not specifically limit the electric control or pneumatic control method, that is, it can complete the slurry suction, dehydration and stripping processes of the paper-plastic container. Those skilled in the art can select a specific control method according to the actual site conditions. For the specific control means of each valve, refer to the following control method, which will not be repeated here.

[0068] Furthermore, since the flow rates required for the slurry suction and dehydration processes are different, the flow rates need to be adjusted in real time. The present application adopts a method of coordinating the switch valve 4 and the regulating valve 5 to control the slurry suction flow rate and the dehydration flow rate by controlling the switch valve 4 and the regulating valve 5 to meet the molding requirements of the paper-plastic container in the slurry suction and dehydration processes.

[0069] This application adopts stop valve + angle valve control, the stop valve is used to control the size of the switch. Since the stop valve or other flow control valves have a slow adjustment speed and cannot meet the instant switching needs, an angle valve is added for control, that is, the stop valve is adjusted to the slurry suction state. When the slurry suction starts, the angle valve opens. When the dehydration state is entered, the stop valve is adjusted normally to control the flow rate. When the stripping state or non-working state is entered, the angle valve is closed and the stop valve is adjusted to the slurry suction state.

[0070] In some embodiments, the control method further comprises:

[0071] A switch valve 4 is provided on the air pressure pipeline 3;

[0072] In response to the wet embryo peeling state, the switch valve 4 is controlled to open;

[0073] In response to the non-working state, the switch valve 4 is controlled to be closed;

[0074] Specifically, in response to the wet embryo peeling state and the non-working state, this embodiment controls the opening or closing of the switch valve 4 provided on the air pressure pipeline 3 to control the inflow and outflow of the external gas into the cavity 11 .

[0075] or;

[0076] The compressed air pipeline 3 is provided with a switch valve 4 and a regulating valve 5;

[0077] In response to the wet embryo peeling state, the switch valve 4 is controlled to be opened, and the regulating valve 5 is in a regulating control state to adjust the flow rate and / or pressure;

[0078] In response to the non-working state, the switch valve 4 is controlled to be closed.

[0079] Specifically, in response to the wet embryo peeling state, the present embodiment controls the opening or closing of the switch valve 4 provided on the compressed air pipeline 3, and at the same time, adjusts the opening of the regulating valve 5 to adjust the flow rate and / or pressure.

[0080] By controlling the opening and closing of the switch valve and the regulating valve through the control method, the slurry flow and pressure in the hollow cavity 11 are controlled to realize the molding operation of the paper-plastic product. The present application can meet the requirements of the wall thickness, strength, density, etc. of the product. When there are multiple cavities, the wall thickness, strength, density, etc. of the specified area can be met. Compared with traditional paper-plastic equipment, when the pressure and flow in the molding process fluctuate, the flow and pressure in the molding process can be detected and adjusted in real time, thereby ensuring the consistency of the product, improving the product qualification rate of paper-plastic containers, and greatly meeting the market demand.

[0081] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A plant fiber slurry suction control device, characterized in that: The control device (1) is provided with one or more cavities (11), wherein the cavities (11) are connected to external vacuum equipment via vacuum pipes (2) and to external air compressor equipment via air compressor pipes (3); The control device (1) is also provided with a detection unit and an adjustment unit, and the detection unit and the adjustment unit cooperate to control the flow rate and / or pressure inside the cavity (11) to complete the slurry absorption process and form a wet embryo.

2. The plant fiber slurry suction control device according to claim 1, characterized in that: The vacuum pipeline (2) and the compressed air pipeline (3) are provided with switch valves (4) for controlling the switch of the pipelines; The vacuum pipeline (2) and / or the compressed air pipeline (3) are provided with a regulating valve (5) for controlling the flow rate of the pipeline; In response to the switch valve (4) and the regulating valve (5) being arranged on the same pipeline, the switch valve (4) and the regulating valve (5) are connected in series.

3. The plant fiber slurry suction control device according to claim 1, characterized in that: In response to the control device (1) being provided with a plurality of cavities (11), the internal gases or liquids of the plurality of cavities (11) are not connected to each other.

4. The plant fiber slurry suction control device according to claim 1, characterized in that: The cavity (11), the vacuum pipe (2) or the air pressure pipe (3) is provided with a pressure control valve (7) for adjusting the pressure in the cavity (11).

5. The plant fiber slurry suction control device according to claim 1, characterized in that: The hollow cavity (11) is provided with a pressure detection unit (8) for detecting the pressure in the cavity.

6. A plant fiber slurry suction control method using the plant fiber slurry suction control device according to any one of claims 1 to 5, characterized in that: The control method comprises: In response to one or more cavities (11), the regulating unit is controlled to operate so as to independently control the flow and / or pressure in each cavity (11).

7. The plant fiber slurry suction control method according to claim 6, characterized in that: The control method comprises: The vacuum pipe (2) is provided with a switch valve (4) and a regulating valve (5); In response to the slurry suction state of the plant fiber slurry, the switch valve (4) is controlled to open, and the regulating valve (5) is controlled to open with a first valve opening, so as to vacuum-suction the slurry and complete the slurry suction operation; In response to the wet embryo dehydration or transfer state, the switch valve (4) is continuously controlled to be opened, and the regulating valve (5) is controlled to be adjusted from the first valve opening to the second valve opening, so as to absorb excess water in the wet embryo, so that the paper-plastic fiber is adsorbed on the mesh structure to be formed, wherein the second valve opening is not less than the first valve opening; In response to the wet embryo being stripped or being in a non-working state, the switch valve (4) is controlled to be closed and the regulating valve (5) is controlled to be restored to the first valve opening, waiting for the next slurry suction instruction.

8. The plant fiber slurry suction control method according to claim 6, characterized in that: The control method further comprises: The compressed air pipeline (3) is provided with a switch valve (4); In response to the wet embryo peeling state, controlling the switch valve (4) to open; In response to a non-working state, controlling the switch valve (4) to close; or; The compressed air pipeline (3) is provided with a switch valve (4) and a regulating valve (5); In response to the wet embryo peeling state, the switch valve (4) is controlled to be opened, and the regulating valve (5) is in a regulating control state; In response to a non-working state, the switch valve (4) is controlled to be closed.

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