Metering feeding system for solid-liquid synchronous feeding

Abstract

The utility model discloses a metering and feeding system for solid-liquid synchronous feeding. The metering and feeding system comprises a solid-liquid synchronous feeding hopper, a solid material metering and feeding device, a liquid material metering and feeding device and a screw extruder, according to the feeding system, synchronous conveying of materials with different solid-liquid ratios can be completed by adjusting the material conveying amount of the weightlessness type single-screw feeding machine and the material conveying amount of the metering pump. Specifically, accurate metering feeding of solid materials is achieved through a weightlessness type single-screw feeding machine, accurate metering feeding of liquid materials is achieved through a metering pump, and the problem that the material proportion is not uniform is solved; through the design of the solid-liquid synchronous feeding hopper, a solid material and a liquid material are respectively conveyed to a feeding hole of the screw extruder, and are fed after being preliminarily mixed in a mixed feeding cavity at the upper part of the feeding hole; and the material conveying assembly is additionally arranged in the solid feeding cavity, so that solid materials and liquid materials are preliminarily mixed at the bottom of the feeding hopper, the phenomena of bridging and material blocking at the feeding port of the screw extruder are prevented, and the problems of poor mixing performance and conveying quantity fluctuation are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of feeding systems, in particular to a metering feeding system for synchronous feeding of solid and liquid. Background Art

[0002] Screw extruders are one of the most commonly used plastics processing machines. They can be paired with various plastic molding auxiliary machines, such as those for pipes, films, rods, sheets, profiles, pelletizing, and cable wrapping, to form various plastic extrusion production lines and produce a variety of plastic products. Screw extruders are continuous processing equipment, and the ability to maintain stable feeding significantly impacts the fluctuation of the extruder's output, which in turn determines the performance stability of the subsequent molded products.

[0003] The most commonly used feeding system currently uses a "volumetric / loss-in-weight feeder + hopper refill" format. The materials are mixed and added to the hopper, and then quantitatively transported directly to the screw feed hopper through the feeder.

[0004] However, when there are many material components, especially when there are liquid additives, the above feeding system is prone to poor proportion uniformity and mixing uniformity between materials. At the same time, the raw material output of the feeder is also prone to inaccuracy and instability, resulting in the inability to guarantee product consistency. Utility Model Content

[0005] The purpose of the utility model is to provide a metering feeding system for synchronous solid-liquid feeding, so as to solve the problems of uneven material ratio, poor mixing and fluctuating conveying volume in feeding under working conditions with a large number of material components.

[0006] In order to solve the above technical problems, the utility model provides a solid-liquid synchronous feeding metering feeding system, comprising a solid-liquid synchronous feeding hopper, a solid material metering feeding device, a liquid material metering feeding device and a screw extruder;

[0007] The solid-liquid synchronous feeding hopper mainly consists of three cavities, including an inner solid feeding cavity, an outer liquid feeding cavity and a mixing feeding cavity at the bottom; the solid feeding cavity is separated from the liquid feeding cavity, and both are connected to the mixing feeding cavity;

[0008] The solid material metering feeding device is connected to the solid feeding chamber to continuously convey the solid material into the solid feeding chamber; the liquid material metering feeding device is connected to the liquid feeding chamber to continuously convey the liquid material into the liquid feeding chamber;

[0009] After the solid material and the liquid material are preliminarily mixed in the mixing feed chamber, they are injected into the feed port of the screw extruder.

[0010] Preferably, the mixing feed chamber is arranged between the bottom of the solid-liquid synchronous feed hopper and the feed port of the screw extruder.

[0011] Preferably, the liquid feed chamber is arranged on the outer side of the solid-liquid synchronous feed hopper close to the mixing feed chamber.

[0012] Preferably, a feeding assembly is provided in the solid-liquid synchronous feeding hopper, which includes a motor and a feeding screw, one end of the feeding screw is connected to the motor shaft of the motor; the other end extends to the feed port of the screw extruder and engages with the screw in the feed port of the screw extruder to rotate synchronously.

[0013] Preferably, the solid feed chamber of the solid-liquid synchronous feed hopper gradually becomes smaller from top to bottom, and the solid material metering feeding device is connected to the upper part of the solid-liquid synchronous feed hopper.

[0014] Preferably, the solid material metering feeding device adopts a loss-in-weight single-screw feeder.

[0015] Preferably, the liquid feed cavity and the solid feed cavity form an annular gap.

[0016] Preferably, the liquid material metering feeding device includes a material tank, a metering pump and a liquid material pipe; one end of the metering pump is connected to the material tank through the liquid material pipe, and the other end is connected to the liquid feeding chamber through the liquid material pipe.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This metering feeding system for synchronous solid-liquid feeding can achieve synchronous conveying of materials with different solid-liquid ratios by adjusting the material conveying capacity of the loss-in-weight single-screw feeder and the metering pump. Specifically, the loss-in-weight single-screw feeder achieves precise metering of solid materials, while the metering pump achieves precise metering of liquid materials, solving the problem of uneven material ratios. Through the design of the synchronous solid-liquid feed hopper, the solid and liquid materials are separately conveyed to the feed port of the screw extruder, and then preliminarily mixed in the mixing feed chamber above the feed port before feeding. In addition, a feeding component is added to the solid feed chamber to allow the solid and liquid materials to be preliminarily mixed at the bottom of the feed hopper, preventing bridging and blockage at the feed port of the screw extruder, thereby solving the problems of poor mixing and fluctuating conveying capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of a metering feeding system for synchronous solid-liquid feeding provided by the utility model;

[0020] Figure 2 This is a structural diagram of the solid-liquid synchronous feeding hopper provided by the utility model;

[0021] Figure 3 It is a structural schematic diagram of the material feeding assembly provided by the utility model.

[0022] In the figure: 1. Solid-liquid synchronous feed hopper; 11. Solid feed chamber; 12. Liquid feed chamber; 13. Mixed feed chamber; 2. Solid material metering feed device; 3. Liquid material metering feed device; 4. Screw extruder; 5. Feeding assembly; 51. Motor; 52. Feeding screw; 53. Motor shaft. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the present invention in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0024] In the description of the present invention, 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 position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 invention.

[0025] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances. Example

[0026] This utility model provides a metering feeding system for solid-liquid synchronous feeding. Figure 1 and Figure 2, including a solid-liquid synchronous feeding hopper 1, a solid material metering feeding device 2, a liquid material metering feeding device 3 and a screw extruder 4; the solid-liquid synchronous feeding hopper 1 mainly has three cavities, including an inner solid feeding chamber 11, an outer liquid feeding chamber 12 and a mixing feeding chamber 13 at the bottom; the solid feeding chamber 11 is separated from the liquid feeding chamber 12, and both are connected to the mixing feeding chamber 13; the solid material metering feeding device 2 is connected to the solid feeding chamber 11, for continuously conveying solid material into the solid feeding chamber 11; the liquid material metering feeding device 3 is connected to the liquid feeding chamber 12, for continuously conveying liquid material into the liquid feeding chamber 12; after the solid material and the liquid material are preliminarily mixed in the mixing feeding chamber 13, they are injected into the feed port of the screw extruder 4.

[0027] This metering feeding system for synchronous solid-liquid feeding can achieve synchronous conveying of materials with different solid-liquid ratios by adjusting the material conveying capacity of the loss-in-weight single-screw feeder and the metering pump. Specifically, the loss-in-weight single-screw feeder achieves precise metering of solid materials, while the metering pump achieves precise metering of liquid materials, solving the problem of uneven material ratios. Through the design of the synchronous solid-liquid feed hopper, the solid and liquid materials are separately conveyed to the feed port of the screw extruder, and then preliminarily mixed in the mixing feed chamber above the feed port before feeding. In addition, a feeding component is added to the solid feed chamber to allow the solid and liquid materials to be preliminarily mixed at the bottom of the feed hopper, preventing bridging and blockage at the feed port of the screw extruder, thereby solving the problems of poor mixing and fluctuating conveying capacity.

[0028] Specifically, the mixing feed chamber 13 is arranged between the bottom of the solid-liquid synchronous feed hopper 1 and the feed port of the screw extruder 4 ; the liquid feed chamber 12 is arranged on the outside of the solid-liquid synchronous feed hopper 1 close to the mixing feed chamber 13 .

[0029] Furthermore, a feeding assembly 5 is provided in the solid-liquid synchronous feeding hopper 1, which includes a motor 51 and a feeding screw 52. One end of the feeding screw 52 is connected to the motor shaft 53 of the motor 51; the other end extends to the feed port of the screw extruder 4 and engages with the screw in the feed port of the screw extruder 4, rotating synchronously to prevent the material from returning.

[0030] Specifically, the solid feed chamber 11 of the solid-liquid synchronous feed hopper 1 gradually becomes smaller from top to bottom, and the solid material metering feeding device 2 is connected to the upper part of the solid-liquid synchronous feed hopper 1. The upper feed chamber is slightly larger to facilitate rapid feeding; the lower feed chamber is slightly smaller to ensure the continuity of feeding.

[0031] In one embodiment, the solid material metering and feeding device 2 is a loss-in-weight single-screw feeder.

[0032] Furthermore, the liquid feed chamber 12 and the solid feed chamber 11 form an annular gap with a relatively small volume to prevent the material in the mixing feed chamber 13 from flowing back into the liquid feed chamber 12 .

[0033] Specifically, the liquid material metering feeding device 3 includes a material tank, a metering pump and a liquid material pipe; one end of the metering pump is connected to the material tank through the liquid material pipe, and the other end is connected to the liquid feeding chamber 12 through the liquid material pipe.

[0034] During operation, the solid material is first conveyed into the solid feed chamber 11 by a loss-in-weight single-screw feeder, and then the solid material is conveyed downward by the feeding assembly 5 provided in the solid-liquid synchronous feeding hopper 1; then the liquid material is conveyed into the liquid feed chamber 12 by a metering pump, and is conveyed to the mixing feed chamber 13 at the bottom by gravity and pressure; through the rotation of the feeding screw 52, ​​the solid material and the liquid material are mixed at the bottom and then injected into the feed port of the screw extruder, finally achieving uniform, stable and continuous solid-liquid synchronous feeding.

[0035] The above description is only a description of the preferred embodiment of the present invention and does not limit the scope of the present invention. Any changes and modifications made by ordinary technicians in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A metering feeding system for synchronous solid-liquid feeding, characterized in that: It comprises a solid-liquid synchronous feeding hopper (1), a solid material metering feeding device (2), a liquid material metering feeding device (3) and a screw extruder (4); The solid-liquid synchronous feeding hopper (1) mainly comprises three cavities, including an inner solid feeding cavity (11), an outer liquid feeding cavity (12), and a bottom mixed feeding cavity (13); the solid feeding cavity (11) is separated from the liquid feeding cavity (12), and both are connected to the mixed feeding cavity (13); The solid material metering feeding device (2) is connected to the solid material feeding chamber (11) and is used to continuously convey the solid material into the solid material feeding chamber (11); the liquid material metering feeding device (3) is connected to the liquid material feeding chamber (12) and is used to continuously convey the liquid material into the liquid material feeding chamber (12); After the solid material and the liquid material are preliminarily mixed in the mixing feed chamber (13), they are injected into the feed port of the screw extruder (4).

2. A metering feeding system for simultaneous solid-liquid feeding according to claim 1, characterized in that: The mixing feed chamber (13) is arranged between the bottom of the solid-liquid synchronous feed hopper (1) and the feed port of the screw extruder (4).

3. A metering feeding system for simultaneous solid-liquid feeding according to claim 2, characterized in that: The liquid feed chamber (12) is arranged on the outer side of the solid-liquid synchronous feed hopper (1) close to the mixing feed chamber (13).

4. A metering feeding system for simultaneous solid-liquid feeding according to claim 3, characterized in that: A feeding assembly (5) is provided in the solid-liquid synchronous feeding hopper (1), which includes a motor (51) and a feeding screw (52). One end of the feeding screw (52) is connected to the motor shaft (53) of the motor (51); the other end extends to the feed port of the screw extruder (4) and engages with the screw in the feed port of the screw extruder (4) to rotate synchronously.

5. A metering feeding system for synchronous solid-liquid feeding according to claim 1, characterized in that: The solid feed chamber (11) of the solid-liquid synchronous feed hopper (1) gradually becomes smaller from top to bottom, and the solid material metering feed device (2) is connected to the upper part of the solid-liquid synchronous feed hopper (1).

6. A metering feeding system for simultaneous solid-liquid feeding according to claim 5, characterized in that: The solid material metering feeding device (2) adopts a weight-loss single screw feeder.

7. A metering feeding system for simultaneous solid-liquid feeding according to claim 3, characterized in that: The liquid feed cavity (12) and the solid feed cavity (11) form an annular gap.

8. The metering feeding system for synchronous solid-liquid feeding according to claim 1, characterized in that: The liquid material metering feeding device (3) comprises a material tank, a metering pump and a liquid material pipe; one end of the metering pump is connected to the material tank via the liquid material pipe, and the other end is connected to the liquid feeding chamber (12) via the liquid material pipe.

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