Filtering device for double-screw extruder

Abstract

The utility model relates to the technical field of filtering, and discloses a filtering device for a double-screw extruder, which is characterized in that a flow guide frame is mounted at the upper end of a feeding frame, a filtering frame is arranged above the flow guide frame in a front-back moving manner, a mounting plate is mounted on the rear side of the flow guide frame, and a swing cylinder is mounted on the rear side of the mounting plate; a push rod of the swing air cylinder is connected with the rear side surface of the filtering frame, the filtering frame is designed to penetrate through up and down to form a filtering cavity, a supporting frame of a cross-shaped structure is welded to the bottom end of the filtering cavity, a filtering net is arranged between the supporting frame and the inner wall of the filtering frame, and three transversely-distributed transmission shafts are arranged in the flow guide frame; the front side and the rear side of the upper portion of the feeding frame are lengthened through the flow guide frame, the filtering frame is arranged on the flow guide frame in an up-down and front-back sliding mode, materials can be evenly laid on the upper portion of the filtering frame, accumulation of the materials above the filtering net is avoided, and rapid filtering and screening of the materials are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of filtration, in particular to a filtration device for a twin-screw extruder. Background Art

[0002] The twin-screw extruder consists of several parts such as a transmission device, a feeding device, a barrel and a screw, and has good feeding performance, mixing and plasticizing performance, exhaust performance, extrusion stability, etc. A Chinese utility model patent with the announcement number CN218838586U discloses a filtering device for a twin-screw extruder, which is provided with vibration springs on both sides of the filter element, and a vibration motor is installed on the front side of the external frame, so that the vibration motor vibrates in the horizontal direction. The vibration springs on both sides of the filter element can increase the vibration amplitude of the filter element, and improve the effect of preventing the filter element from blocking.

[0003] In the above structure, the vibration motor is installed outside the filter device to generate vibration in the horizontal direction. The material is generally poured directly on the top of the filter element and screened through the filter element. The position of the filter element is fixed, and the position of the material above the filter element is also fixed. This will cause the material to be concentrated in a certain area above the filter element, resulting in a low filtration efficiency. For this reason, we designed a filtering device for a twin-screw extruder. Utility Model Content

[0004] In order to solve the technical problem that materials are concentrated in a certain area above the filter core, resulting in low filtering efficiency, the utility model provides a filtering device for a twin-screw extruder.

[0005] The utility model is implemented by the following technical scheme: a filtering device for a twin-screw extruder, comprising a twin-screw extruder, a feed frame is arranged at the right end of the twin-screw extruder, a frame is arranged at the rear side of the feed frame, a flow guide frame is installed at the upper end of the feed frame, a filter frame is arranged above the flow guide frame in a forward and backward movable manner, a mounting plate is installed at the rear side of the flow guide frame, a swing cylinder is installed at the rear side of the mounting plate, a push rod of the swing cylinder is connected to the rear side surface of the filter frame, the filter frame is designed to penetrate up and down to form a filter cavity, a cross-shaped support frame is welded at the bottom end of the filter cavity, and a filter screen is arranged between the support frame and the inner wall of the filter frame;

[0006] Three laterally distributed transmission shafts are arranged inside the guide frame, and a collision roller is installed on each of the transmission shafts.

[0007] As a further improvement of the above scheme, the bottom surface of the filter frame is flush with the upper surface of the guide frame, the left and right outer walls of the filter frame do not contact the inner wall of the guide frame, and there is a 1-3mm gap between the two, so that all the materials inside the filter frame can fall into the guide frame, thereby facilitating entry into the feed frame, and avoiding wear between the filter screen and the guide frame;

[0008] The left and right surfaces of the outside of the filter frame are both provided with a plurality of support wheels distributed at equal intervals. The support wheels are rolled on the upper surface of the guide frame, which can support the filter frame and avoid wear between the filter screen and the guide frame, facilitating the forward and backward movement of the filter frame.

[0009] As a further improvement of the above scheme, two socket holes are symmetrically opened on the left and right sides of the mounting plate about the swing cylinder, and a guide rod is arranged in the socket hole for sliding back and forth. The front end of the guide rod is screwed to the rear surface of the filter frame, which can guide the forward and backward movement of the filter frame, prevent its position from shifting during the movement, and improve stability.

[0010] As a further improvement of the above scheme, an inclined guide ramp is provided at both the front and rear ends of the guide frame, and the outward end of the guide ramp is higher than the inward end. When the filter frame moves forward and backward, the material will fall above the guide ramp, and then slide along the guide ramp into the feed frame, which is convenient for material unloading and will not fall to the outside.

[0011] As a further improvement of the above scheme, the collision roller is located in the middle of the bottom of the filter frame, and three collision protrusions distributed in a ring are arranged on the outer ring surface of the collision roller, the height of the collision protrusion is greater than the distance between the top of the outer ring surface of the collision roller and the bottom end of the filter frame, and the collision protrusion is a soft rubber support, the collision protrusion is located below the longitudinal part of the support frame, and it can collide with the support frame when the transmission shaft and the collision roller rotate, thereby causing it to vibrate, and the design of the soft rubber enables it to deform without causing damage to the support plate, and it can collapse when colliding without causing the filter frame to lift up.

[0012] As a further improvement of the above scheme, the rear ends of the three transmission shafts pass through the guide frame and are placed on the rear side thereof, and a toothed pulley is installed at the rear end of the transmission shaft. An impact motor is also arranged on the frame. The three transmission shafts are connected to the output shaft of the impact motor through a toothed pulley and a toothed belt. A toothed pulley is also installed on the output shaft of the impact motor. The rotation of the output shaft of the impact motor can cause the three transmission shafts to rotate, thereby causing the collision protrusion to impact the filter frame, causing it to vibrate up and down.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model sets a guide frame above the feed frame, which makes the front and rear sides of the feed frame longer, and sets a filter frame by sliding the guide frame up and down and forward and backward, so that the material can be evenly laid on the filter frame, thereby avoiding the accumulation of materials above the filter net, which is convenient for rapid filtering and screening;

[0015] 2. Three transmission shafts are arranged in the guide frame, and collision rollers and collision protrusions are arranged on the transmission shafts. The collision protrusions are designed with soft rubber so that they can be deformed without causing damage to the support frame. They can collapse when colliding without lifting the filter frame. The swing cylinder is arranged so that the filter frame can move forward and backward while vibrating up and down, thereby improving the filtration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the overall structure of a filtering device for a twin-screw extruder provided by the utility model;

[0017] Figure 2 for Figure 1 The front and rear isometric drawings of the

[0018] Figure 3 for Figure 1 Structural schematic diagram of the middle flow guide frame and the filter frame;

[0019] Figure 4 for Figure 3 Bottom diagram of .

[0020] Description of main symbols:

[0021] 1. Twin-screw extruder; 2. Feed frame; 3. Guide frame; 31. Guide ramp; 32. Mounting plate; 4. Filter frame, 41. Filter chamber; 42. Support frame; 43. Filter screen; 44. Support wheel; 5. Swing cylinder; 51. Guide rod; 6. Impact motor; 7. Drive shaft; 71. Collision roller; 72. Collision protrusion. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0023] Example:

[0024] Please combine Figure 1-Figure 4, a filtering device for a twin-screw extruder 1 of the present embodiment comprises a twin-screw extruder 1, a feed frame 2 is arranged at the right end of the twin-screw extruder 1, a frame is arranged at the rear side of the feed frame 2, and the feature is that a guide frame 3 is installed at the upper end of the feed frame 2, a filter frame 4 is arranged above the guide frame 3 and can be moved forward and backward, a mounting plate 32 is installed at the rear side of the guide frame 3, a swing cylinder 5 is installed at the rear side of the mounting plate 32, a push rod of the swing cylinder 5 is connected to the rear side surface of the filter frame 4, the filter frame 4 is designed to penetrate from top to bottom to form a filter cavity 41, a support frame 42 of a cross-shaped structure is welded at the bottom end of the filter cavity 41, and a filter screen 43 is arranged between the support frame 42 and the inner wall of the filter frame 4;

[0025] Three laterally distributed transmission shafts 7 are arranged inside the guide frame 3 , and a collision roller 71 is installed on each transmission shaft 7 .

[0026] The bottom surface of the filter frame 4 is flush with the upper surface of the guide frame 3, the left and right outer walls of the filter frame 4 do not contact the inner wall of the guide frame 3, and there is a 1-3mm gap between the two, so that the material inside the filter frame 4 can all fall into the guide frame 3, and then it is easy to enter the feed frame 2, and the wear between the filter screen 43 and the guide frame 3 is avoided;

[0027] The left and right surfaces of the outside of the filter frame 4 are both provided with a plurality of support wheels 44 distributed at equal intervals. The support wheels 44 are rolled on the upper surface of the guide frame 3, which can support the filter frame 4 and avoid wear between the filter net 43 and the guide frame 3, facilitating the forward and backward movement of the filter frame 4.

[0028] Two socket holes are symmetrically provided on the left and right sides of the mounting plate 32 about the swing cylinder 5. A guide rod 51 is provided in the socket hole for sliding back and forth. The front end of the guide rod 51 is screwed to the rear surface of the filter frame 4, which can guide the forward and backward movement of the filter frame 4, prevent its position from shifting during the movement, and improve stability.

[0029] The front and rear ends of the guide frame 3 are both provided with an inclined guide plate 31, and the outward end of the guide plate 31 is higher than the inward end. When the filter frame 4 moves forward and backward, the material will fall above the guide plate 31, and then can slide along the guide plate 31 into the feed frame 2, which is convenient for the discharge of the material and will not fall to the outside.

[0030] The collision roller 71 is located in the middle of the bottom of the filter frame 4, and three collision protrusions 72 distributed in a ring are arranged on the outer ring surface of the collision roller 71. The height of the collision protrusion 72 is greater than the distance between the top of the outer ring surface of the collision roller 71 and the bottom end of the filter frame 4, and the collision protrusion 72 is made of a soft rubber. The collision protrusion 72 is located below the longitudinal part of the support frame 42. When the transmission shaft 7 and the collision roller 71 rotate, it can collide with the support frame 42, thereby causing it to vibrate, and the design of the soft rubber enables it to deform without causing damage to the support frame 42. It can collapse when colliding and will not cause the filter frame 4 to lift up.

[0031] The rear ends of the three transmission shafts 7 all pass through the guide frame 3 and are placed on the rear side thereof, and a toothed pulley is installed at the rear end of the transmission shaft 7. An impact motor 6 is also arranged on the frame. The three transmission shafts 7 are connected to the output shaft of the impact motor 6 through a toothed pulley and a toothed belt. A toothed pulley is also installed on the output shaft of the impact motor 6. The rotation of the output shaft of the impact motor 6 can cause the three transmission shafts 7 to rotate, thereby causing the collision protrusion 72 to impact the filter frame 4, causing it to vibrate up and down.

[0032] The implementation principle of a filtering device for a twin-screw extruder 1 in the embodiment of the present application is as follows: the power supply of the swing cylinder 5 and the impact motor 6 is turned on, and the push rod of the swing cylinder 5 is extended and retracted back and forth, so that the filter frame 4 moves back and forth above the guide frame 3, and the impact motor 6 causes the three transmission shafts 7 to rotate, and the collision roller 71 located on the transmission shaft 7 will rotate at a low speed, so that the collision protrusion 72 will continuously hit the support frame 42 in the filter frame 4, so that the filter frame 4 can vibrate up and down, and the material is poured from the top of the guide frame 3 onto the filter frame 4, and because the filter frame 4 moves back and forth, the material can be evenly placed above the filter screen 43, so that the material can be screened without causing accumulation and blockage;

[0033] By arranging the guide frame 3 above the feed frame 2, the guide frame 3 makes the front and rear sides of the feed frame 2 longer, and the guide frame 3 slides up and down and forward and backward to set the filter frame 4, so that the material can be evenly laid on the filter frame 4, thereby avoiding the accumulation of materials above the filter screen 43, which is convenient for its rapid filtering and screening;

[0034] By arranging three transmission shafts 7 in the guide frame 3, collision rollers 71 and collision protrusions 72 are arranged on the transmission shafts 7. The collision protrusions 72 are designed with soft rubber so that they can be deformed without causing damage to the support plate. They can collapse when colliding without lifting the filter frame 4. In combination with the swing cylinder 5, the filter frame 4 can move forward and backward while vibrating up and down, thereby improving the filtration efficiency.

[0035] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A filtering device for a twin-screw extruder, comprising a twin-screw extruder (1), wherein a feed frame (2) is arranged at the right end of the twin-screw extruder (1), and a frame is arranged at the rear side of the feed frame (2), characterized in that: A flow guide frame (3) is installed at the upper end of the feed frame (2), a filter frame (4) is movably arranged above the flow guide frame (3), a mounting plate (32) is installed at the rear side of the flow guide frame (3), a swing cylinder (5) is installed at the rear side of the mounting plate (32), a push rod of the swing cylinder (5) is connected to the rear surface of the filter frame (4), the filter frame (4) is designed to penetrate from top to bottom to form a filter cavity (41), a support frame (42) of a cross-shaped structure is welded at the bottom end of the filter cavity (41), and a filter screen (43) is arranged between the support frame (42) and the inner wall of the filter frame (4); Three laterally distributed transmission shafts (7) are arranged inside the guide frame (3), and a collision roller (71) is installed on each of the transmission shafts (7).

2. A twin-screw extruder filtering device as claimed in claim 1, characterized in that: The bottom surface of the filter frame (4) is flush with the upper surface of the guide frame (3); the left and right outer walls of the filter frame (4) do not contact the inner wall of the guide frame (3), and there is a spacing of 1-3 mm between the two; A plurality of support wheels (44) distributed at equal intervals are provided on both the left and right external surfaces of the filter frame (4), and the support wheels (44) are rotatably placed on the upper surface of the guide frame (3).

3. A twin-screw extruder filtering device as claimed in claim 1, characterized in that: Two sleeve holes are symmetrically provided on the left and right sides of the mounting plate (32) with respect to the swing cylinder (5), and a guide rod (51) is slidably arranged in the sleeve hole, and the front end of the guide rod (51) is screw-connected to the rear surface of the filter frame (4).

4. A twin-screw extruder filtering device as claimed in claim 1, characterized in that: Both the front and rear ends of the guide frame (3) are provided with an inclined guide plate (31), and the outward end of the guide plate (31) is higher than the inward end.

5. A twin-screw extruder filtering device as claimed in claim 1, characterized in that: The collision roller (71) is located in the middle of the bottom of the filter frame (4), and the outer ring surface of the collision roller (71) is provided with three collision protrusions (72) distributed in an annular shape, the height of the collision protrusions (72) is greater than the distance between the top of the outer ring surface of the collision roller (71) and the bottom of the filter frame (4), and the collision protrusions (72) are made of soft rubber.

6. A twin-screw extruder filtering device as claimed in claim 1, characterized in that: The rear ends of the three transmission shafts (7) all pass through the guide frame (3) and are placed on the rear side thereof, and a toothed belt pulley is installed at the rear end of the transmission shaft (7). An impact motor (6) is also arranged on the frame, and the three transmission shafts (7) are connected to the output shaft of the impact motor (6) through the toothed belt pulley and the toothed belt.

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