Exhaust port structure for PVB (polyvinyl butyral) single-screw extruder

Abstract

The utility model discloses an exhaust port structure for a PVB single screw extruder, which comprises an extruder main body, one side of the top of the extruder main body is respectively provided with a mounting pipe and an air outlet, the inner side of the mounting pipe is sleeved with an exhaust pipe, the top of the exhaust pipe is provided with a cleaning mechanism, and the outer side of the exhaust pipe is provided with a fixing mechanism. An annular plate is mounted at the top of the mounting pipe; the exhaust pipe is connected to the inner side of the mounting pipe in a sleeving manner, so that the exhaust pipe can be directly rotated to adjust the exhaust direction, gas can be exhausted to a specified direction under the arrangement of the L-shaped structure of the exhaust pipe, the influence of the exhausted gas on workers is avoided, and the working efficiency is improved by utilizing the structural adjustment of the fixing mechanism. The exhaust pipe rotating by an angle can be conveniently positioned, rotation of the exhaust pipe is avoided, and the adjusting flexibility and the fixing effect of the exhaust pipe are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of exhaust devices for single-screw extruders, specifically an exhaust port structure for a PVB single-screw extruder. Background Technology

[0002] PVB film, also known as PVB film, PVB membrane or PVB intermediate film, is a product that is now fully industrialized. The exhaust port device is a device structure installed on the screw extruder barrel used in PVB production to discharge the gas inside the screw barrel. Gas is usually generated during the extrusion operation of the PVB screw extruder, and at this time the exhaust port is needed to discharge the gas.

[0003] Authorization announcement number CN220052825U discloses a venting device for a PVB single-screw extruder. This device mainly uses a venting guide block to discharge gas from the screw barrel while simultaneously blocking material from entering the venting cylinder and clogging it, thus ensuring the normal production operation of the single-screw extruder. However, in actual use, the device still has the following defects:

[0004] The aforementioned patent mainly uses an exhaust guide block to discharge the gas inside the screw barrel, preventing materials from entering the exhaust pipe and clogging it. However, existing exhaust pipes are usually set in a vertical shape, making it difficult to redirect the discharged gas according to needs. Furthermore, the inner wall of the exhaust pipe is prone to accumulating dirt after long-term use, requiring the pipe to be removed for cleaning. However, the installation structure of the pipe is relatively complex, making actual disassembly and assembly difficult. In addition, it is difficult to directly contact the inner wall of the pipe, increasing the difficulty and inconvenience of the cleaning work. Utility Model Content

[0005] The purpose of this invention is to provide a venting structure for a PVB single-screw extruder to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a vent structure for a PVB single-screw extruder, comprising an extruder body, an installation pipe and an air outlet respectively provided on one side of the top of the extruder body, an exhaust pipe sleeved on the inner side of the installation pipe, a cleaning mechanism provided on the top of the exhaust pipe, a fixing mechanism provided on the outer side of the exhaust pipe, and an annular plate installed on the top of the installation pipe.

[0007] Preferably, the top of the air outlet has a conical structure, and the air outlet is connected to the exhaust pipe, thereby improving the stability of the connection between the air outlet and the exhaust pipe structure.

[0008] Preferably, the exhaust pipe is rotatably sleeved inside the mounting pipe, and the exhaust pipe has an L-shaped structure to facilitate the discharge of gas from a designated direction.

[0009] Preferably, the cleaning mechanism includes a top plate, which is installed on top of the exhaust pipe. A matching sealing plate is provided on the inner side of the top plate, and a crank handle is sleeved on the inner side of the sealing plate. A turntable is provided at the bottom of the crank handle, and a scraper is provided at the bottom edge of the turntable, and the scraper is in contact with the inner wall of the exhaust pipe.

[0010] Preferably, a sealing gasket is provided between the sealing plate and the top plate, and bolts for fixing to the top plate are provided on both sides inside the sealing plate, so as to facilitate the disassembly and assembly of the sealing plate and the top plate by means of bolts.

[0011] Preferably, the fixing mechanism includes a positioning plate, which is installed on the outside of the exhaust pipe. A threaded block is installed on one side of the bottom of the annular plate, and a threaded rod is sleeved on the inner side of the threaded block. A positioning plate and a locking block are respectively provided on the top of the outer side of the threaded rod. Multiple sets of openings are opened on the outer side of the positioning plate, and the locking block is adapted to the openings.

[0012] Preferably, the locking block and the opening are on the same horizontal plane and locked in place, and the positioning plate is higher than the horizontal plane of the positioning disk and is fixed in place with the positioning disk, so as to facilitate the positioning of the positioning disk and the exhaust pipe by the contact between the positioning plate and the top surface of the positioning disk.

[0013] This utility model proposes a venting port structure for a PVB single-screw extruder, which includes at least the following:

[0014] Beneficial effects:

[0015] 1. The exhaust pipe is connected to the inside of the installation pipe, which facilitates the direct rotation of the exhaust pipe to adjust the exhaust direction. With the L-shaped structure of the exhaust pipe, the gas is directed to a designated position, avoiding any impact on workers. The fixed mechanism facilitates the positioning of the angularly rotated exhaust pipe, preventing it from rotating on its own and increasing the flexibility and effectiveness of the exhaust pipe adjustment. When the threaded rod is removed from the threaded block, the positioning plate and the locking block can be removed from the positioning disc, allowing the exhaust pipe to be pulled out as a whole, making the pipe structure easy to disassemble and clean.

[0016] 2. The structure of the cleaning mechanism allows for easy rotation of the handle outside the pipe body. This allows the handle to drive the turntable and scraper to rotate along the inner wall of the exhaust pipe, thereby scraping the inner wall of the exhaust pipe. This, combined with the water solution, enables the cleaning of the pipe body, increasing the cleaning efficiency. The sealing plate can also be removed from the connection point of the top plate for cleaning or replacement of the scraper. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2This is a front sectional view of the present invention;

[0019] Figure 3 For the present utility model Figure 2 Enlarged schematic diagram of the structure at point A;

[0020] Figure 4 This is a top view of the positioning disc of this utility model.

[0021] In the diagram: 1. Extruder body; 2. Mounting pipe; 3. Exhaust pipe; 4. Cleaning mechanism; 41. Top plate; 42. Sealing plate; 43. Handle; 44. Turntable; 45. Scraper; 5. Fixing mechanism; 51. Positioning plate; 52. Threaded block; 53. Threaded rod; 54. Clamping block; 55. Positioning plate; 56. Opening; 6. Air outlet; 7. Annular plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 The present invention provides an embodiment of an exhaust port structure for a PVB single screw extruder, comprising an extruder body 1, an installation pipe 2 and an exhaust port 6 respectively provided on one side of the top of the extruder body 1, an exhaust pipe 3 sleeved on the inner side of the installation pipe 2, a cleaning mechanism 4 provided on the top of the exhaust pipe 3, a fixing mechanism 5 provided on the outer side of the exhaust pipe 3, and an annular plate 7 installed on the top of the installation pipe 2.

[0024] The top of the air outlet 6 is conical. The air outlet 6 is connected to the exhaust pipe 3, which improves the stability of the connection between the air outlet 6 and the exhaust pipe 3. The exhaust pipe 3 is rotatably sleeved on the inside of the mounting pipe 2. The exhaust pipe 3 has an L-shaped structure, which facilitates the discharge of gas from a specified direction.

[0025] The cleaning mechanism 4 includes a top plate 41, which is installed on the top of the exhaust pipe 3. A matching sealing plate 42 is provided on the inner side of the top plate 41. A crank 43 is sleeved on the inner side of the sealing plate 42. A turntable 44 is provided at the bottom of the crank 43. A scraper 45 is provided at the edge of the bottom of the turntable 44, and the scraper 45 is in contact with the inner wall of the exhaust pipe 3.

[0026] The fixing mechanism 5 includes a positioning plate 51, which is installed on the outside of the exhaust pipe 3. A threaded block 52 is installed on one side of the bottom of the annular plate 7. A threaded rod 53 is sleeved on the inner side of the threaded block 52. A positioning plate 55 and a locking block 54 are respectively provided on the top of the outer side of the threaded rod 53. Multiple sets of openings 56 are opened on the outer side of the positioning plate 51. The locking block 54 is adapted to the openings 56.

[0027] Example 1, as Figure 2-3 As shown, a sealing gasket is provided between the sealing plate 42 and the top plate 41. Bolts that are fixed to the top plate 41 are provided on both sides inside the sealing plate 42. By providing a sealing gasket between the sealing plate 42 and the top plate 41, the sealing performance of the structural connection is improved, preventing gas from escaping from the connection between the sealing plate 42 and the top plate 41. The bolts facilitate the connection and fixation of the sealing plate 42 and the top plate 41, and make it easy to remove the bolt connection structure so that the sealing plate 42 and the scraper 45 can be removed directly, allowing the scraper 45 to be cleaned or replaced separately.

[0028] Example 2, as Figure 2 and Figure 4 As shown, the locking block 54 and the opening 56 are on the same horizontal plane and locked in place. The positioning plate 55 is higher than the horizontal plane of the positioning disk 51 and is fixed in place with the positioning disk 51. The locking block 54 and the positioning plate 55 are adjusted by the threaded rod 53. When the locking block 54 and the opening 56 are kept horizontal and locked in place, the rotation of the positioning disk 51 and the exhaust pipe 3 can be limited to prevent the exhaust pipe 3 from rotating. When the locking surface of the locking block 54 on the opening 56 is removed, the exhaust pipe 3 can be rotated to drive the positioning disk 51 to rotate and adjust the exhaust position of the exhaust pipe 3.

[0029] Working principle: The exhaust port structure of this PVB single-screw extruder;

[0030] During the operation of the PVB single-screw extruder, the generated gas is introduced into the exhaust pipe 3 through the exhaust port 6. The L-shaped exhaust pipe 3 is used to exhaust gas to one side. When it is necessary to adjust the exhaust position of the exhaust pipe 3, the height of the locking block 54 and the positioning plate 55 can be raised by rotating the threaded rod 53, and the locking block 54 can be released from the locking and fixing of the opening 56. At this time, the exhaust pipe 3 can be rotated to rotate the positioning plate 51 to a specified angle. The threaded rod 53 is rotated again to reset the positioning plate 55 and the locking block 54, so that the positioning plate 55 contacts and fixes the top surface of the positioning plate 51, so as to change the exhaust angle of the exhaust pipe 3 and increase the adjustment function of the exhaust port.

[0031] When it is necessary to disassemble the exhaust pipe 3, simply rotate the threaded rod 53 to remove it from the threaded connection of the threaded block 52. At this time, the exhaust pipe 3, which is connected to the air outlet 6, can be pulled out from the installation pipe 2 to clean the inner wall of the exhaust pipe 3. The crank handle 43 can be manually rotated to drive the turntable 44 and the scraper 45 to rotate synchronously, so that the scraper 45 can rotate and scrape along the inner wall of the exhaust pipe 3. This can be combined with the injection of water to scrape and clean the inner wall of the exhaust pipe 3, improving the operability and convenience of cleaning the exhaust pipe 3 and increasing the work efficiency of exhaust pipe disassembly and maintenance.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A venting structure for a PVB single-screw extruder, comprising an extruder body (1), characterized in that: The extruder body (1) has an installation pipe (2) and an air outlet (6) on one side of its top. An exhaust pipe (3) is sleeved inside the installation pipe (2). A cleaning mechanism (4) is provided on the top of the exhaust pipe (3). A fixing mechanism (5) is provided on the outside of the exhaust pipe (3). An annular plate (7) is installed on the top of the installation pipe (2).

2. The exhaust port structure for a PVB single-screw extruder according to claim 1, characterized in that: The top of the air outlet (6) has a conical structure, and the air outlet (6) is connected to the exhaust pipe (3).

3. The exhaust port structure for a PVB single-screw extruder according to claim 1, characterized in that: The exhaust pipe (3) is rotatably sleeved on the inside of the mounting pipe (2), and the exhaust pipe (3) has an L-shaped structure.

4. The exhaust port structure for a PVB single-screw extruder according to claim 1, characterized in that: The cleaning mechanism (4) includes a top plate (41) which is installed on the top of the exhaust pipe (3). The inner side of the top plate (41) is provided with a matching sealing plate (42). The inner side of the sealing plate (42) is fitted with a crank handle (43). The bottom of the crank handle (43) is provided with a turntable (44). The bottom edge of the turntable (44) is provided with a scraper (45), and the scraper (45) is in contact with the inner wall of the exhaust pipe (3).

5. The exhaust port structure for a PVB single-screw extruder according to claim 4, characterized in that: A sealing gasket is provided between the sealing plate (42) and the top plate (41), and bolts are provided on both sides inside the sealing plate (42) to be fixed to the top plate (41).

6. The exhaust port structure for a PVB single-screw extruder according to claim 1, characterized in that: The fixing mechanism (5) includes a positioning plate (51), which is installed on the outside of the exhaust pipe (3). A threaded block (52) is installed on one side of the bottom of the annular plate (7). A threaded rod (53) is sleeved on the inner side of the threaded block (52). A positioning plate (55) and a locking block (54) are respectively provided on the top of the outer side of the threaded rod (53). Multiple sets of openings (56) are opened on the outer side of the positioning plate (51). The locking block (54) is adapted to the openings (56).

7. The exhaust port structure for a PVB single-screw extruder according to claim 6, characterized in that: The locking block (54) is on the same horizontal plane as the opening (56) and is locked in place. The positioning plate (55) is higher than the horizontal plane of the positioning disk (51) and is fixed in place with the positioning disk (51).

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