Feeding device for PVC pipe production

Abstract

The utility model relates to the technical field of PVC (polyvinyl chloride) pipe production, and particularly discloses a feeding device for PVC pipe production, which comprises a feeding hopper, a feeding bin is arranged at the top of the feeding hopper, and a feeding pipe communicated with a feeding hole of an extruder is arranged at the bottom of the feeding hopper; the stirring mechanism comprises a driving part arranged at the top of the feeding hopper, a stirring shaft which is rotationally connected into the feeding hopper and is driven by the driving part to rotate, and a plurality of stirring frames arranged on the side wall of the stirring shaft; the stirring frame comprises a first vertical section attached to the inner wall of the feeding hopper, a second vertical section attached to the inner wall of the feeding pipe, a connecting section arranged between the first vertical section and the second vertical section, and horizontal sections arranged between the free end of the first vertical section and the stirring shaft and between the free end of the second vertical section and the stirring shaft respectively. And in the process that the stirring frame rotates to stir the plastic powder particles, the plastic powder adhering to the inner wall of the feeding hopper can be scraped off, and therefore the situation that the plastic powder particles adhere to the inner wall of the feeding hopper, and consequently the mixing uniformity of the plastic powder is affected is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of PVC pipe production, and specifically discloses a feeding device for PVC pipe production. Background Art

[0002] PVC pipe is a kind of pipe whose main component is polyvinyl chloride, with other ingredients added to enhance its heat resistance, toughness and ductility.

[0003] In the production of PVC pipes, polyvinyl chloride powder and other auxiliary raw materials need to be mixed to form mixed plastic powder, and then the mixed plastic powder is evenly transported to the extrusion equipment and cooling equipment to form PVC pipes.

[0004] In the existing PVC pipe production process, it is usually necessary to fully grind polyvinyl chloride and other auxiliary raw materials, and then use a feeding device to mix the polyvinyl chloride raw materials and other auxiliary raw materials and pass them into an extruder for extrusion molding. The existing feeding device is usually a feed hopper arranged at the feed inlet of the extruder, and a stirring mechanism is configured in the feed hopper to mix and stir the plastic powder so that the mixed plastic powder is evenly mixed and then enters the extruder for extrusion molding. However, since the ground plastic powder particles are small, they are easy to adhere to the inner wall of the feed hopper, which not only affects the uniformity of the plastic powder mixing, but also easily causes powder accumulation and scaling on the inner wall of the feed hopper, increasing the maintenance time and cost in the PVC pipe production process. Therefore, in view of this, the inventor provides a feeding device for PVC pipe production to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to solve the problem that in the production process of traditional PVC pipes, plastic powder particles are easily adhered to the inner wall of the feed hopper, affecting the mixing uniformity of the plastic powder.

[0006] In order to achieve the above-mentioned purpose, the basic scheme of the present utility model provides a feeding device for PVC pipe production, comprising:

[0007] A feed hopper, with a feed bin at the top and a feed pipe at the bottom connected to the feed port of the extruder;

[0008] The stirring mechanism includes a driving member arranged at the top of the feed hopper, a stirring shaft rotatably connected to the feed hopper and driven to rotate by the driving member, and a plurality of stirring frames arranged on the side walls of the stirring shaft, the stirring frame including a first vertical section affixed to the inner wall of the feed hopper, a second vertical section affixed to the inner wall of the feed pipe, a connecting section arranged between the first vertical section and the second vertical section, and horizontal sections respectively arranged between the free ends of the first vertical section and the second vertical section and the stirring shaft.

[0009] Furthermore, the stirring shaft is a hollow shaft, a connecting shaft is connected inside the stirring shaft, the bottom of the connecting shaft extends out of the stirring shaft and is provided with a vibration disk, and an adjustment component for driving the connecting shaft to move vertically is provided in the feed hopper.

[0010] Furthermore, the adjustment assembly includes a sleeve sleeved on the outer wall of the stirring shaft and a wave groove opened on the inner wall of the sleeve, the side wall of the stirring shaft is provided with at least one through groove, and the side wall of the connecting shaft is provided with at least one slider passing through the through groove and cooperating with the wave groove.

[0011] Furthermore, the length of the through groove is greater than the height difference between the highest point and the lowest point of the wave groove.

[0012] Furthermore, the vibration plate is provided with a plurality of elastic contact rods respectively located directly below each stirring frame.

[0013] Furthermore, a conical guide surface is provided at the bottom of the feed hopper, the feed pipe is located at the lowest point of the conical guide surface, and the connecting section is in contact with the inner wall of the conical guide surface.

[0014] Furthermore, a rubber sleeve is provided on one side of the first vertical section, the connecting section and the second vertical section close to the inner wall of the feed hopper.

[0015] The principle and effect of this solution are:

[0016] Compared with the prior art, the present invention provides a stirring frame that is respectively fitted with the inner walls of the feed hopper and the feed pipe, so that the stirring frame can scrape off the plastic powder adhering to the inner wall of the feed hopper during the process of rotating to stir the plastic powder particles, thereby avoiding the plastic powder particles adhering to the inner wall of the feed hopper and affecting the uniformity of plastic powder mixing; at the same time, the present invention adopts an adjusting component to drive the connecting shaft to move vertically, so as to drive the vibration plate to vibrate, thereby achieving the effect of vertical vibration on the plastic particles at the bottom of the feed hopper, thereby avoiding the hollowing phenomenon due to the mutual squeezing of the plastic particles, thereby improving the uniformity of feeding to the extruder, and an elastic touch rod is provided on the vibration plate, so that during the vertical movement of the vibration plate, the elastic touch rod reciprocates in contact with the stirring shaft, thereby causing the plastic particles adhering to the stirring frame to vibrate and fall into the feed hopper. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1A schematic diagram of a feeding device for PVC pipe production proposed in an embodiment of the present application is shown;

[0019] Figure 2 The figure shows the internal structure of a feeding device for PVC pipe production proposed in an embodiment of the present application;

[0020] Figure 3 A schematic diagram of an adjustment component in a feeding device for PVC pipe production proposed in an embodiment of the present application is shown;

[0021] Figure 4 A schematic diagram of the corrugated trough structure in a feeding device for PVC pipe production proposed in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0022] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0023] The reference numerals in the drawings of the specification include: feed hopper 1, feed bin 2, top cover 3, servo motor 4, stirring shaft 5, stirring frame 6, vibration plate 7, connecting shaft 8, sleeve 9, through groove 10, slider 11, and wave groove 12.

[0024] A feeding device for PVC pipe production, for example Figure 1 As shown, it includes a feed hopper 1 and a stirring mechanism disposed in the feed hopper 1 and stirring the plastic powder, specifically as follows:

[0025] Feed hopper 1: A top cover 3 is provided on the top of the feed hopper 1, a feed bin 2 is provided on the top side wall of the feed hopper 1, a bin cover is provided on the feed bin 2, a conical guide surface is provided at the bottom of the feed hopper 1, and a feed pipe connected to the feed port of the extruder is provided at the lowest point of the bottom of the conical guide surface.

[0026] Stirring mechanism: The stirring mechanism includes a driving member provided on the top of the feed hopper 1, a stirring shaft 5 rotatably connected to the feed hopper 1 and driven to rotate by the driving member, and a plurality of stirring racks 6 provided on the side wall of the stirring shaft 5. The driving member can be a servo motor 4 and is installed on the top of the top cover 3 through a mounting bracket, such as Figure 2 As shown, the stirring frame 6 includes a first vertical section that is in contact with the inner wall of the feed hopper 1, a second vertical section that is in contact with the inner wall of the feed pipe, a connecting section that is provided between the first vertical section and the second vertical section and is in contact with the inner wall of the conical guide surface, and horizontal sections that are respectively provided between the free ends of the first vertical section and the second vertical section and the stirring shaft 5. The first vertical section, the connecting section and the second vertical section are all provided with a rubber sleeve on one side close to the inner wall of the feed hopper 1, as shown in FIG. Figure 3As shown, the stirring shaft 5 is a hollow shaft, and a connecting shaft 8 is connected to the stirring shaft 5. The top of the stirring shaft 5 is connected to the output shaft of the servo motor 4 through a coupling. There is a gap between the top of the connecting shaft 8 and the top of the stirring shaft 5 to allow the connecting shaft 8 to move vertically. The bottom of the connecting shaft 8 extends out of the stirring shaft 5 and is provided with a vibrating disk 7. An adjusting component for driving the connecting shaft 8 to move vertically is provided in the feed hopper 1, as shown in FIG. Figure 3 and Figure 4 As shown, the adjustment component includes a sleeve 9 sleeved on the outer wall of the stirring shaft and a wave groove 12 opened on the inner wall of the sleeve 9. The sleeve 9 is fixed to the top cover 3 of the feed hopper 1. The side wall of the stirring shaft 5 is symmetrically provided with two through grooves 10. The side wall of the connecting shaft 8 is symmetrically provided with two sliders 11 that pass through the two through grooves 10 respectively and cooperate with the wave groove 12. The length of the through groove 10 is greater than the height difference between the highest and lowest points of the wave groove 12. The cooperation between the slider 11 and the through groove 10 enables the side wall of the through groove 10 to drive the slider 11 to rotate synchronously during the rotation of the stirring shaft 5. The vibration disk 7 is provided with a number of elastic touch rods located directly below each stirring frame 6. The elastic touch rod adopts a hard rod and an elastic contact is configured on the top of the hard rod. When the vibration disk 7 moves vertically, the elastic touch rod reciprocates and contacts with the stirring shaft 5, thereby causing the plastic particles adhering to the stirring frame 6 to vibrate and fall into the feed hopper 1.

[0027] During the implementation of this embodiment, the ground plastic powder particles enter the feed hopper 1 from the feed bin 2, and the servo motor 4 is started under the control of the motor switch or controller, thereby driving the stirring shaft 5 and the connecting shaft 8 to rotate, thereby mixing the plastic powder particles evenly. At the same time, the stirring frame 6 rotates along the inner wall of the feed hopper 1, the inner wall of the conical guide surface and the inner wall of the feed pipe, scraping off the plastic powder adhering to the inner wall of the feed hopper 1, thereby preventing the plastic powder particles from adhering to the inner wall of the feed hopper 1 and affecting the uniformity of the plastic powder mixing. At the same time, the slider 11 cooperates with the through groove 10 to drive the connecting shaft 8 and the vibration plate 7 to move vertically, thereby having a vertical vibration effect on the plastic particles at the bottom of the feed hopper 1, thereby avoiding the hollowing phenomenon caused by the mutual squeezing of the plastic particles, thereby improving the uniformity of feeding to the extruder, and an elastic touch rod is provided on the vibration plate 7, so that during the vertical movement of the vibration plate 7, the elastic touch rod reciprocates in contact with the stirring shaft 5, thereby causing the plastic particles adhering to the stirring frame 6 to vibrate and fall into the feed hopper 1.

[0028] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A feeding device for PVC pipe production, characterized in that: include: A feed hopper, with a feed bin at the top and a feed pipe at the bottom connected to the feed port of the extruder; The stirring mechanism includes a driving member arranged at the top of the feed hopper, a stirring shaft rotatably connected to the feed hopper and driven to rotate by the driving member, and a plurality of stirring frames arranged on the side walls of the stirring shaft, the stirring frame including a first vertical section affixed to the inner wall of the feed hopper, a second vertical section affixed to the inner wall of the feed pipe, a connecting section arranged between the first vertical section and the second vertical section, and horizontal sections respectively arranged between the free ends of the first vertical section and the second vertical section and the stirring shaft.

2. A feeding device for PVC pipe production according to claim 1, characterized in that: The stirring shaft is a hollow shaft, a connecting shaft is connected inside the stirring shaft, the bottom of the connecting shaft extends out of the stirring shaft and is provided with a vibration disk, and an adjustment component for driving the connecting shaft to move vertically is provided in the feed hopper.

3. A feeding device for PVC pipe production according to claim 2, characterized in that: The adjustment assembly includes a sleeve sleeved on the outer wall of the stirring shaft and a wave groove opened on the inner wall of the sleeve. The side wall of the stirring shaft is provided with at least one through groove, and the side wall of the connecting shaft is provided with at least one sliding block passing through the through groove and cooperating with the wave groove.

4. A feeding device for PVC pipe production according to claim 3, characterized in that: The length of the through groove is greater than the height difference between the highest point and the lowest point of the wave groove.

5. A feeding device for PVC pipe production according to claim 2, characterized in that: The vibration plate is provided with a plurality of elastic contact rods which are respectively located directly below each stirring frame.

6. A feeding device for PVC pipe production according to any one of claims 1 to 5, characterized in that: The bottom of the feed hopper is provided with a conical guide surface, the feed pipe is located at the lowest point of the conical guide surface, and the connecting section is in contact with the inner wall of the conical guide surface.

7. A feeding device for PVC pipe production according to claim 6, characterized in that: The first vertical section, the connecting section and the second vertical section are all provided with a rubber sleeve on one side close to the inner wall of the feed hopper.

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