Centrifugal device for polyamide resin production

Abstract

The utility model discloses a centrifugal device for polyamide resin production, and particularly relates to the technical field of centrifugal machines, which comprises a centrifugal machine and a filter cartridge rotatably arranged in the centrifugal machine. The scraper is used for scraping an impurity layer on the filter cartridge and comprises a bent part; the telescopic rod is used for driving the scraper to move in the vertical direction, the scraper is rotationally arranged at the end of the telescopic rod, and a limiting plate is fixedly arranged at the end of the telescopic rod; the push rods are rotationally arranged relative to the telescopic rod, are arranged on the two sides of the scraper in a sliding mode and are in sliding fit with the limiting plate. According to the centrifugal device for polyamide resin production, when pressure borne by a scraper is too large, a bent part is pressed to be bent, the distance between the scraper and a telescopic rod is shortened, an abutting part arranged at the first end of a push rod is extruded and pushed, the push rod is guided by a sliding groove to rotate, and therefore the push rod drives the scraper to rotate in the direction away from an impurity layer; and the scrapers are prevented from being damaged due to long-term compression.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifuges, in particular to a polyamide resin production centrifugal device. Background Art

[0002] The centrifugal process in resin production is mainly used to separate and concentrate solid particles in the resin slurry. A scraper is often used to remove the solid particles from the filter.

[0003] In conjunction with publication number CN113426589A, publication date 2021-09-24, a scraper device for a centrifuge is disclosed, including a base panel, and a rotating drum is provided on the lower side of the base panel; in the present invention, the scraper rotation is controlled by a servo motor driving an electric cylinder. Compared with the prior art using cylinders or hydraulics, parameters such as the scraping feed speed and return speed can be controlled according to requirements, and the scraping feed speed can also be adjusted in real time according to parameters such as the torque value and current value measured during scraping.

[0004] However, the above technology mainly adjusts the scraper torque by real-time measurement, which requires the cooperation of sensors and other electronic components. The high heat generated during the centrifugation process will affect the electronic components, and the scraper angle cannot be adjusted in real time, resulting in damage to the scraper. Utility Model Content

[0005] The purpose of this utility model is to provide a polyamide resin production centrifugal device to solve the above problems.

[0006] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: A polyamide resin production centrifugal device, comprising a centrifuge and a filter cartridge rotatably arranged therein, including:

[0007] a scraper, used to scrape off the impurity layer on the filter cartridge, including a curved portion;

[0008] A telescopic rod is used to drive the scraper to move in the vertical direction, and the scraper is rotatably arranged at the end of the telescopic rod, and a limit plate is fixedly provided at the end of the telescopic rod;

[0009] A push rod is rotatably arranged relative to the telescopic rod and is slidably arranged on both sides of the scraper and is slidably matched with the limit plate;

[0010] When the bending portion is bent under pressure, the scraper pushes the push rod and rotates to a predetermined angle.

[0011] Preferably, a sliding groove is provided on the limiting plate.

[0012] Preferably, a rotating rod is rotatably provided at the end of the telescopic rod, and the curved portion is fixedly provided on the rotating rod, and a straight plate for sliding the push rod is fixedly provided on the rotating rod.

[0013] Preferably, a rotating rod is rotatably provided on the scraper, and a guide groove for guiding the rotating rod is opened on the straight plate, and the guide groove includes a guide groove and an arc groove consistent with the curvature of the scraper.

[0014] Preferably, the straight plate is provided with a spring for keeping the push rod in an initial state.

[0015] Preferably, a plurality of scraping teeth are fixedly provided on the rotating rod.

[0016] Preferably, a torsion spring is provided on the scraping tooth to keep it pointing toward the filter cartridge.

[0017] In the above technical solution, the utility model provides a polyamide resin production centrifugal device, which has the following beneficial effects: when the pressure on the scraper is too large, the bending part is compressed and bent, and the distance between the scraper and the telescopic rod is shortened, and the resistance part set at the first end of the push rod is pushed, and the push rod is guided by the slide groove to rotate, so that the push rod drives the scraper to rotate in the direction away from the impurity layer, avoiding the scraper from being damaged due to long-term pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 An overall three-dimensional schematic diagram provided for an embodiment of the present utility model;

[0020] Figure 2 A schematic diagram of a cutaway lower scraper structure provided in an embodiment of the present utility model;

[0021] Figure 3 A schematic diagram of the scraper, push rod and straight plate structure provided in an embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of the push rod and straight plate structure provided by an embodiment of the utility model.

[0023] Description of reference numerals:

[0024] 1. Centrifuge; 2. Telescopic mechanism; 3. Filter cartridge; 4. Telescopic rod; 41. Limiting plate; 42. Rotating rod; 43. Slide; 5. Scraper; 51. Bending portion; 52. Rotating rod; 53. Scraping teeth; 54. Push rod; 541. Interference portion; 542. Sliding portion; 55. Straight plate; 551. Arc groove; 552. Guide groove. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] like Figure 1-4 As shown, a polyamide resin production centrifugal device includes a centrifuge 1 and a filter cartridge 3 rotatably arranged therein, including:

[0027] The scraper 5 is used to scrape off the impurity layer on the filter cartridge 3 and includes a curved portion 51;

[0028] The telescopic rod 4 is used to drive the scraper 5 to move in the vertical direction, and the scraper 5 is rotatably arranged at the end of the telescopic rod 4, and a limit plate 41 is fixedly provided at the end of the telescopic rod 4;

[0029] The push rod 54 is rotatably arranged relative to the telescopic rod 4 and is slidably arranged on both sides of the scraper 5 and is slidably engaged with the limit plate 41;

[0030] The bending portion 51 is bent under pressure, and the scraper 5 pushes the push rod 54 and rotates to a predetermined angle.

[0031] Specifically, the centrifuge 1 is provided with a telescopic mechanism 2 to drive the telescopic rod 4 to move in the vertical direction, and the telescopic rod 4 drives the scraper 5 to move in the vertical direction, thereby scraping off the impurity layer formed inside the filter cartridge 3 in the rotating state. When the scraper 5 is subjected to too much pressure, the bent portion 51 is compressed and bent. At this time, the distance between the scraper 5 and the telescopic rod 4 is shortened, and the interference portion 541 set at the first end of the push rod 54 is squeezed and pushed. The push rod 54 is slidably set on both sides of the scraper 5, and the sliding path points to the axis of the telescopic rod 4. Under the squeezing, the push rod 54 slides radially along the telescopic rod 4, so that the sliding portion 542 at the second end of the push rod 54 slides with the slide groove 43 provided on the limit plate 41. Therefore, the push rod 54 is guided by the slide groove 43 to rotate, so that the push rod 54 drives the scraper 5 to rotate in the direction away from the impurity layer, thereby preventing the scraper 5 from being damaged by long-term pressure.

[0032] In the above technology, when the pressure on the scraper 5 is too great, the bending portion 51 is compressed and bent. At this time, the distance between the scraper 5 and the telescopic rod 4 is shortened, and the resistance portion 541 set at the first end of the push rod 54 is pushed. The push rod 54 is guided by the slide groove 43 and rotates, so that the push rod 54 drives the scraper 5 to rotate in the direction away from the impurity layer, thereby preventing the scraper 5 from being damaged due to long-term pressure.

[0033] As an embodiment further provided by the present invention, a rotating rod 42 is rotatably provided at the end of the telescopic rod 4, and the curved portion 51 is fixedly provided on the rotating rod 42, and a straight plate 55 for the push rod 54 to slide is fixedly provided on the rotating rod 42.

[0034] Specifically, there are two straight plates 55, and both are fixedly set on the rotating rod 42 and point to the axis. The push rod 54 is slidably set on the straight plates 55. The scraper 5 is located between the two straight plates 55, and the scraper 5 is fixedly connected to the rotating rod 42 through the curved portion 51. When the scraper 5 is under greater pressure, the curved portion 51 bends, so that the distance between the scraper 5 and the rotating rod 42 is reduced, squeezing the push rod 54, and the push rod 54 slides on the straight plates 55.

[0035] As another embodiment further provided by the present invention, a rotating rod 52 is rotatably provided on the scraper 5, and a guide groove for guiding the rotating rod 52 is opened on the straight plate 55. The guide groove includes a guide groove 552 and an arc groove 551 consistent with the curvature of the scraper 5.

[0036] Specifically, both ends of the rotating rod 52 extend a distance beyond the scraper 5, and the guide groove 552 has an opening on the straight plate 55. When the scraper 5 and the straight plate 55 are connected, the curved portion 51 is first placed in a compressed and bent state, so that both ends of the rotating rod 52 are located at the openings of the guide groove 552, and then the rotating rod 52 is made to slide along the guide groove 552. The hand is released to allow the curved portion 51 to be released and expanded under its own deformation potential energy, and the rotating rod 52 and the guide groove 552 are locked with each other, and the curved portion 51 is kept in a certain tight state. When the scraper 5 is subjected to a small pressure, the curved portion 51 offsets the pressure through its own deformation potential energy and will not bend or deform. When the pressure exceeds the bearing range of the curved portion 51, the curved portion 51 bends and deforms. At this time, the scraper 5 approaches the rotating rod 42, thereby driving the rotating rod 52 to slide along the arc groove 551, and during the sliding process, it contacts the contact portion 541 of the push rod 54.

[0037] As another embodiment further provided by the present invention, a spring is provided on the straight plate 55 for keeping the push rod 54 in an initial state.

[0038] Specifically, the spring keeps the push rod 54 in its initial state without being pushed. When the rotating rod 52 pushes the resistance part 541, the spring stretches and starts to store energy until the pressure on the scraper 5 is reduced, the deformation of the curved part 51 is restored and expanded, driving the rotating rod 52 to no longer push the resistance part 541. The elastic potential energy of the spring is released and pulls the push rod 54 back to its initial state, thereby driving the sliding part 542 to slide with the slide groove 43 again, thereby realizing the reset of the straight plate 55 and the scraper 5.

[0039] As another embodiment further provided by the present invention, a plurality of scraping teeth 53 are fixedly provided on the rotating rod 52 .

[0040] Specifically, a torsion spring is provided on the scraper 53 to keep it pointing to the filter cartridge 3 at all times, so that it can scrape against the inner wall of the filter cartridge 3. When the scraper 5 is under greater pressure, it will rotate a certain distance and move away from the filter cartridge 3. At this time, the scraper 53 is still pointed to the inner wall of the filter cartridge 3 and contacts the impurity layer due to the elastic action of the torsion spring. Since the contact area of ​​the scraper 53 with the impurity layer is small, the scraper 53 can first cut the impurity layer, reduce the integrity of the impurity layer, and reduce the resistance when the scraper 5 scrapes it later.

[0041] Working principle: When connecting the scraper 5 and the straight plate 55, the curved portion 51 is first placed in a compressed and bent state, so that both ends of the rotating rod 52 are located at the openings of the guide groove 552, and then the rotating rod 52 is made to slide along the guide groove 552, and the hand is released to release the curved portion 51 under its own deformation potential energy and expand, and the rotating rod 52 and the guide groove 552 are locked with each other, and the curved portion 51 is kept in a certain tight state. When the scraper 5 is subjected to a small pressure, the curved portion 51 offsets the pressure through its own deformation potential energy and does not bend. When the pressure exceeds the bearing range of the curved portion 51, the curved portion 51 bends and deforms, and the distance between the scraper 5 and the rotating rod 42 is reduced. The rotating rod 52 slides along the arc groove 551 and contacts the contact portion 541 of the push rod 54 during the sliding process. The push rod 54 slides along the radial direction of the telescopic rod 4 and rebounds. The spring stretches and begins to store energy, causing the sliding portion 542 at the second end of the push rod 54 to slide with the slide groove 43 provided on the limit plate 41. Therefore, the push rod 54 is guided by the slide groove 43 to rotate, thereby causing the push rod 54 to drive the scraper 5 to rotate in the direction away from the impurity layer. At this time, the scraper teeth 53 are still directed to the inner wall of the filter cartridge 3 and in contact with the impurity layer by the elastic action of the torsion spring. Since the contact area of ​​the scraper teeth 53 with the impurity layer is small, the scraper teeth 53 can first cut the impurity layer and reduce the integrity of the impurity layer; until the pressure on the scraper 5 is reduced, the deformation of the curved portion 51 is restored and expanded, driving the rotating rod 52 to no longer squeeze the resistance portion 541, the elastic potential energy of the spring is released and pulls the push rod 54 to return to its initial state, thereby driving the sliding portion 542 to slide with the slide groove 43 again, realizing the reset of the straight plate 55 and the scraper 5.

[0042] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A polyamide resin production centrifugal device, comprising a centrifuge (1) and a filter cartridge (3) rotatably arranged therein, characterized in that: include; a scraper (5) for scraping off the impurity layer on the filter cartridge (3), comprising a curved portion (51); A telescopic rod (4) is used to drive the scraper (5) to move in a vertical direction, and the scraper (5) is rotatably arranged at the end of the telescopic rod (4), and a limit plate (41) is fixedly arranged at the end of the telescopic rod (4); A push rod (54) is rotatably arranged relative to the telescopic rod (4), and is slidably arranged on both sides of the scraper (5), and is slidably matched with the limit plate (41); When the bending portion (51) is bent under pressure, the scraper (5) pushes the push rod (54) and rotates to a predetermined angle.

2. A polyamide resin production centrifugal device according to claim 1, characterized in that, The limiting plate (41) is provided with a sliding groove (43).

3. A polyamide resin production centrifugal device according to claim 1, characterized in that, The end of the telescopic rod (4) is rotatably provided with a rotating rod (42), and the curved portion (51) is fixedly provided on the rotating rod (42). A straight plate (55) for sliding the push rod (54) is fixedly provided on the rotating rod (42).

4. A polyamide resin production centrifugal device according to claim 3, characterized in that, The scraper (5) is rotatably provided with a rotating rod (52), and a guide groove for guiding the rotating rod (52) is provided on the straight plate (55). The guide groove comprises a guide groove (552) and an arc groove (551) having the same arc as the scraper (5).

5. A polyamide resin production centrifugal device according to claim 3, characterized in that, The straight plate (55) is provided with a spring for keeping the push rod (54) in an initial state.

6. A polyamide resin production centrifugal device according to claim 4, characterized in that, A plurality of scraping teeth (53) are fixedly arranged on the rotating rod (52).

7. A polyamide resin production centrifugal device according to claim 6, characterized in that: The scraping teeth (53) are provided with torsion springs to keep them pointing toward the filter cartridge (3).

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