A vacuum connection mechanism for a twin-screw extruder

Abstract

The utility model relates to a vacuum connection mechanism of a twin-screw extruder, including a base, a heating tube fixedly connected to the bottom of the base, the heating tube extending to the top of the base, a first clamping ring fixedly connected to the outside of the heating tube, a vacuum pumping device provided on the top of the heating tube, a second clamping ring fixedly connected to the outside of the vacuum pumping device, fastening rings provided on the outsides of the first and second clamping rings, the fastening rings are non-closed open-loop structures, a fastening assembly is provided at the opening of the fastening ring, and the fastening assembly is used to fix the first and second clamping rings. The utility model solves the problem that the vacuum connection needs to be frequently disassembled, and the vacuum device using a square exhaust port module stacked with a vacuum port and fixed with bolts is troublesome to disassemble, time-consuming and labor-intensive, and affects normal production work, and therefore a new connection structure is needed.

Description

Technical Field

[0001] The utility model relates to the technical field of twin-screw extruders, in particular to a vacuum connection mechanism of a twin-screw extruder. Background Art

[0002] Twin-screw extruder is a key equipment for plastic material production, which mixes, melts and conveys the formulated materials. During the production process, the pressure inside the barrel will increase due to impurities in the process materials. When the pressure is too high, it will cause the vacuum port to escape, which will block the vacuum air intake pipe and is difficult to clean, seriously affecting the working efficiency of the twin-screw extruder.

[0003] The connection between the vacuum device and the heating tube is generally fixed with bolts. However, the vacuum device is prone to clogging of the pipeline because the material it extracts is relatively viscous. It is also possible that the raw materials will leak out of the vacuum port because the machine feeds too much or the machine head is blocked. Therefore, the vacuum connection needs to be disassembled frequently. The vacuum device that uses a square exhaust port module and a vacuum port stacked and fixed with bolts is troublesome to disassemble, which is time-consuming and labor-intensive, affecting normal production work. Therefore, a new connection structure is needed. Utility Model Content

[0004] In view of the above problems existing in the prior art, the main purpose of the utility model is to provide a vacuum connection mechanism for a twin-screw extruder.

[0005] The technical solution of the utility model is as follows: a vacuum connection mechanism of a twin-screw extruder, comprising a base, a heating tube fixedly connected to the bottom of the base, the heating tube extending to the top of the base, a first clamping ring fixedly connected to the outside of the heating tube, a vacuum pumping device provided on the top of the heating tube, a second clamping ring fixedly connected to the outside of the vacuum pumping device, fastening rings provided on the outsides of the first clamping ring and the second clamping ring, the fastening ring is a non-closed open-loop structure, a fastening assembly is provided at the opening of the fastening ring, and the fastening assembly is used to fix the first clamping ring and the second clamping ring.

[0006] As a preferred embodiment, the fastening assembly includes four fixing blocks, and the four fixing blocks are fixedly connected to both sides of the opening of the fastening ring in pairs, a fixing rod is rotatably connected between the two fixing blocks at one end of the opening, a mounting block is fixedly connected to the outer side of the fixing rod, a threaded rod is fixedly connected to one side of the mounting block, and a first nut is threadedly connected to the outer side of the threaded rod and one side of the two fixing blocks at the other end of the opening.

[0007] As a preferred embodiment, a trapezoidal groove is provided on the inner side of the fastening ring, and a slope is provided on one side of the first and second snap rings, and the inner wall of the trapezoidal groove fits with the slopes of the first and second snap rings respectively.

[0008] As a preferred implementation, the diameter of the first nut is larger than the distance between two fixing blocks located at one end of the opening of the fastening ring.

[0009] As a preferred embodiment, one end of the first nut away from the threaded rod is fixedly connected to a handle, the outer side of the handle is provided with a rounded corner, the inside of the handle is provided with a through hole, and one end of the threaded rod extends into the inside of the through hole.

[0010] As a preferred embodiment, circular holes are provided at the four corners of the base, screws are slidably connected inside the four circular holes, one end of the four screws is fixedly connected to the top of the device at the bottom of the base, and the outer sides of the four screws are threadedly connected with a second nut.

[0011] Compared with the prior art, the advantages and positive effects of the utility model are that when the first clamping ring and the second clamping ring are fixed, the heating tube and the vacuum device are connected, and the circular interface is more convenient and quick when disassembling; at this time, through the rotation of the fixing rod, the turning handle drives the first nut and the threaded rod to rotate, and when rotated to a certain angle, the heating tube and the vacuum device are disassembled and repaired, shortening the disassembly time, thereby improving production efficiency and reducing material waste; thereby, the first clamping ring and the second clamping ring are fixed and limited to prevent shaking or movement during work; the rounded corners on the outside of the turning handle are better for holding and rotating during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model provides a schematic diagram of the main exploded structure of a vacuum connection mechanism of a twin-screw extruder;

[0013] Figure 2 The utility model provides a schematic diagram of an exploded structure of a vacuum connection mechanism of a twin-screw extruder viewed from above;

[0014] Figure 3 The utility model provides a main structural schematic diagram of a vacuum connection mechanism of a twin-screw extruder;

[0015] Figure 4 The utility model provides a structural schematic diagram of a fastening ring, a first clamping ring and a second clamping ring of a vacuum connection mechanism of a twin-screw extruder;

[0016] Figure 5 The utility model provides a schematic diagram of a half-section structure of a fastening ring, a first clamping ring and a second clamping ring of a vacuum connection mechanism of a twin-screw extruder;

[0017] Figure 6 The utility model provides a vacuum connection mechanism for a twin-screw extruder Figure 5 An enlarged schematic diagram of point A.

[0018] Legend: 1. Base; 2. Heating tube; 3. Vacuum extraction device; 4. First clamping ring; 5. Second clamping ring; 6. Fastening ring; 7. Fixing block; 8. Fixing rod; 9. Mounting block; 10. Threaded rod; 11. First nut; 12. Turning handle; 13. Round hole; 14. Screw; 15. Second nut; 16. Trapezoidal groove. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] Example 1

[0021] like Figure 1-Figure 6 As shown, the utility model provides a technical solution: a vacuum connection mechanism of a twin-screw extruder, comprising a base 1, a heating tube 2 is fixedly connected to the bottom of the base 1, the heating tube 2 extends to the top of the base 1, a first clamping ring 4 is fixedly connected to the outside of the heating tube 2, a vacuum pumping device 3 is provided on the top of the heating tube 2, a second clamping ring 5 is fixedly connected to the outside of the vacuum pumping device 3, fastening rings 6 are provided on the outsides of the first clamping ring 4 and the second clamping ring 5, the fastening ring 6 is a non-closed open-loop structure, a fastening assembly is provided at the opening of the fastening ring 6, and the fastening assembly is used to fix the first clamping ring 4 and the second clamping ring 5.

[0022] Through the above embodiment, when the heating tube 2 is connected to the vacuum device 3, the fastening ring 6 is contracted and fastened through the fastening assembly. When the fastening ring 6 is contracted, the first clamping ring 4 and the second clamping ring 5 are driven to fit and extrude for fixation. When the first clamping ring 4 and the second clamping ring 5 are fixed, the heating tube 2 is driven to be connected to the vacuum device 3, and the circular interface is more convenient and quick when disassembling.

[0023] The fastening assembly includes four fixing blocks 7, which are fixedly connected to both sides of the opening of the fastening ring 6 in pairs, and a fixing rod 8 is rotatably connected between the two fixing blocks 7 at one end of the opening. A mounting block 9 is fixedly connected to the outside of the fixing rod 8, and a threaded rod 10 is fixedly connected to one side of the mounting block 9. A first nut 11 is threadedly connected to the outside of the threaded rod 10 and one side of the two fixing blocks 7 at the other end of the opening. When the fastening ring 6 is contracted and fixed, the first nut 11 is rotated to move the first nut 11. When the first nut 11 moves to one side of the two fixing blocks 7, it conflicts with one side of the two fixing blocks 7, thereby driving the entire fastening ring 6 to contract, thereby performing a fixed connection. When disassembling and repairing, the first nut 11 is rotated to move the first nut 11 out of the squeezed conflicting state. At this time, the fixing rod 8 is rotated, so that the handle 12 drives the first nut 11 and the threaded rod 10 to rotate. When it rotates to a certain angle, the heating tube 2 and the vacuum device 3 are disassembled and repaired, shortening the disassembly time, thereby improving production efficiency and reducing waste of materials.

[0024] Among them, a trapezoidal groove 16 is provided on the inner side of the fastening ring 6, and a slope is provided on one side of the first snap ring 4 and the second snap ring 5, and the inner wall of the trapezoidal groove 16 is respectively fitted with the slopes of the first snap ring 4 and the second snap ring 5. When the fastening ring 6 contracts, it drives the first snap ring 4 and the second snap ring 5 to be squeezed inwards, and at this time, the slope of the trapezoidal groove 16 contacts and squeezes the slopes of the first snap ring 4 and the second snap ring 5, thereby fixing and limiting the first snap ring 4 and the second snap ring 5 to prevent shaking or movement during work.

[0025] Among them, the diameter of the first nut 11 is larger than the distance between the two fixing blocks 7 at one end of the opening of the fastening ring 6. The first nut 11 is fixedly connected to a turning handle 12 at one end away from the threaded rod 10. The outer side of the turning handle 12 is provided with a rounded corner. The inside of the turning handle 12 is provided with a through hole, and one end of the threaded rod 10 extends to the inside of the through hole. Circular holes 13 are provided at the four corners of the base 1. Screws 14 are slidably connected inside the four circular holes 13. One end of the four screws 14 is fixedly connected to the top of the device at the bottom of the base 1. The outer sides of the four screws 14 are threadedly connected with second nuts 15. The diameter of the first nut 11 is larger than the distance between the two fixing blocks 7 to prevent it from falling off during contraction and conflict. The rounded corners on the outer side of the turning handle 12 are better for holding and turning during use.

[0026] Working principle: when the heating tube 2 is connected to the vacuum device 3, the first nut 11 is driven to move by rotating the handle 12. When the first nut 11 moves to one side of the two fixed blocks 7, it conflicts with one side of the two fixed blocks 7, thereby driving the entire fastening ring 6 to shrink. When the fastening ring 6 shrinks, it drives the first clamping ring 4 and the second clamping ring 5 to fit and extrude for fixing. When the first clamping ring 4 and the second clamping ring 5 are fixed, the heating tube 2 is driven to connect with the vacuum device 3. When the heating tube 2 and the vacuum device 3 are disassembled and repaired, the handle 12 is rotated to rotate the first nut 11, so that the first nut 11 is out of the extrusion and conflicting state. At this time, the fixing rod 8 is rotated, so that the handle 12 drives the first nut 11 and the threaded rod 10 to rotate. When rotated to a certain angle, the heating tube 2 and the vacuum device 3 are disassembled and repaired.

Claims

1. A vacuum connection mechanism for a twin-screw extruder, comprising a base (1), characterized in that: A heating tube (2) is fixedly connected to the bottom of the base (1), the heating tube (2) extends to the top of the base (1), a first clamping ring (4) is fixedly connected to the outer side of the heating tube (2), a vacuum device (3) is provided on the top of the heating tube (2), a second clamping ring (5) is fixedly connected to the outer side of the vacuum device (3), a fastening ring (6) is provided on the outer side of the first clamping ring (4) and the second clamping ring (5), the fastening ring (6) is a non-closed open-loop structure, a fastening assembly is provided at the opening of the fastening ring (6), and the fastening assembly is used to fix the first clamping ring (4) and the second clamping ring (5).

2. A vacuum connection mechanism for a twin-screw extruder according to claim 1, characterized in that: The fastening assembly comprises four fixing blocks (7), the four fixing blocks (7) are fixedly connected in pairs to two sides of an opening of a fixing ring (6), a fixing rod (8) is rotatably connected between two fixing blocks (7) at one end of the opening, a mounting block (9) is fixedly connected to the outside of the fixing rod (8), a threaded rod (10) is fixedly connected to one side of the mounting block (9), and a first nut (11) is threadedly connected to the outside of the threaded rod (10) and to one side of two fixing blocks (7) at the other end of the opening.

3. The vacuum connection mechanism of a twin-screw extruder according to claim 1, characterized in that: A trapezoidal groove (16) is provided on the inner side of the fastening ring (6), and inclined surfaces are provided on one side of the first clamping ring (4) and the second clamping ring (5), and the inner wall of the trapezoidal groove (16) is respectively fitted with the inclined surfaces of the first clamping ring (4) and the second clamping ring (5).

4. A vacuum connection mechanism for a twin-screw extruder according to claim 2, characterized in that: The diameter of the first nut (11) is larger than the distance between two fixing blocks (7) located at one end of the opening of the fastening ring (6) and close to each other.

5. The vacuum connection mechanism of a twin-screw extruder according to claim 2, characterized in that: One end of the first nut (11) away from the threaded rod (10) is fixedly connected to a turning handle (12), the outer side of the turning handle (12) is provided with a rounded corner, the interior of the turning handle (12) is provided with a through hole, and one end of the threaded rod (10) extends into the interior of the through hole.

6. The vacuum connection mechanism of a twin-screw extruder according to claim 1, characterized in that: The base (1) is provided with circular holes (13) at four corners, and screws (14) are slidably connected inside the four circular holes (13). One end of the four screws (14) is fixedly connected to the top of the device at the bottom of the base (1), and the outer sides of the four screws (14) are threadedly connected to second nuts (15).

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