A scraper structure for scraping off crystals on the inner wall of a cylinder

Abstract

The application relates to the evaporator technical field, in particular to a scraper structure for scraping off crystals on the inner wall of a cylinder, which comprises a holder main body, a side vertical plate, a rotating arm, a blade mounting seat, a scraper blade, and is further provided with an elastic compensation mechanism; the rotation of the rotating arm forms a non-90-degree inclination angle between the cutting edge of the scraper blade and the inner wall of the cylinder; the elastic compensation mechanism is used for providing the blade mounting seat with a pre-tightening force which is pressed towards the inner wall of the cylinder; by arranging the rotating arm, the cutting edge of the scraper blade and the inner wall of the cylinder form a certain inclination angle, the problem that a relatively hard crystal lifts the scraper along the contact point between the cutting edge and the cylinder wall is effectively avoided, the crystal residues are greatly reduced, and the disadvantages of the traditional structure that scraping is not thorough are solved; the elastic compensation mechanism provides the blade mounting seat with the pre-tightening force which is pressed towards the inner wall of the cylinder, can ensure that the scraper blade is always in close contact with the inner wall of the cylinder, avoids the decline of the scraping effect caused by the close contact, and further guarantees the thoroughness and stability of the scraping.

Description

Technical Field

[0001] This utility model relates to the field of evaporator technology, and in particular to a scraper structure for removing crystals from the inner wall of a cylinder. Background Technology In industrial production, cylindrical drying and crystallization equipment is widely used for the drying and crystallization of materials. Its core function relies heavily on the effective removal of crystals from the inner wall of the cylinder. The scraper, as a key component that directly acts on the crystallized material on the cylinder wall, has a structural design that directly affects the equipment's operating efficiency, product quality, and maintenance costs.

[0002] In existing technologies, traditional scrapers typically employ a 90° perpendicular contact design with the cylinder wall. The drawbacks of vertical scraping are mainly twofold: First, incomplete scraping and significant residue problems. Because the scraper edge is in 90° perpendicular contact with the cylinder wall, the contact between the edge and the crystalline layer is only linear rather than surface-level. During scraping, the crystalline layer is subjected more to compression than cutting force. When encountering harder crystals, the crystals exert an upward thrust along the contact point between the edge and the cylinder wall, lifting the scraper and resulting in some areas of crystals not being effectively scraped off. Actual measurements show that the residual thickness can reach approximately 3 cm, severely impacting subsequent drying effects and product purity. Second, the cutting edge suffers from rapid wear. The 90° perpendicular contact concentrates the contact pressure in a very narrow area of ​​the cutting edge, with the theoretical contact area approaching zero, causing significant stress concentration. When the crystals contain hard particles (such as silicates), these particles exert a vertical impact on the cutting edge, triggering a "micro-chipping" effect, resulting in microscopic defects on the cutting edge, increasing the frequency of blade replacement and maintenance costs. Summary of the Invention

[0003] To solve the above problems, this utility model provides a scraper structure for removing crystals from the inner wall of a cylinder, comprising: Tool holder body; Side uprights, which are fixedly installed at both ends of the tool holder body; A rotating arm, one end of which is rotatably mounted on the side plate; A blade mounting base is fixedly mounted on the rotating arm; A scraper blade, the scraper blade being mounted on the blade mounting base; An elastic compensation mechanism is also provided, which is disposed between the blade mounting seat and the blade holder body; the rotation of the rotating arm causes the cutting edge of the scraper blade to form a non-90-degree inclination angle with the inner wall of the cylinder, and the elastic compensation mechanism is used to provide a pre-tightening force to the blade mounting seat pressing against the inner wall of the cylinder.

[0004] In one embodiment, the rotating arms are provided on both sides of the side plate, and scraper blades are respectively installed on the two rotating arms, forming a symmetrical bidirectional scraping structure.

[0005] In one embodiment, the elastic compensation mechanism includes a guide post and a preload spring; the upper end of the guide post is hinged to the blade mounting seat, and the lower end passes through a guide hole provided on the blade holder body; the preload spring is sleeved on the guide post and located between the blade holder body and the blade mounting seat.

[0006] In one embodiment, four rotating arms and four guide pillars are provided, two on each side, and symmetrically arranged on both sides of the side plate.

[0007] In one embodiment, the angle between the scraper blade and the inner wall of the cylinder ranges from 20° to 40°.

[0008] In one embodiment, a pressure blade is also included. The pressure blade is a plate-shaped structure adapted to the shape of the scraper blade. The pressure blade is fixedly connected to the blade mounting base by at least two bolts, and the scraper blade is fixed to the blade mounting base by the pressure blade and the bolts.

[0009] In one embodiment, the angle between the scraper blade and the inner wall of the cylinder is in the range of 30°.

[0010] In one embodiment, the pressure blade is mounted on the blade mounting base by five bolts.

[0011] The beneficial effects of this utility model are as follows: This utility model discloses a scraper structure for removing crystals from the inner wall of a cylinder. By setting a rotating arm, the blade edge of the scraper forms a certain angle with the inner wall of the cylinder. This changes the situation where, when the traditional scraper blade contacts the inner wall of the cylinder at a 90-degree angle, the blade edge only makes line contact and presses into the crystal layer. Instead, it forms surface contact, so that the crystal layer is subjected to cutting action rather than compression. This effectively avoids the problem of ineffective scraping caused by hard crystals lifting the scraper along the contact point between the blade edge and the cylinder wall. It greatly reduces crystal residue and solves the drawback of incomplete scraping in traditional structures. The non-90-degree tilt angle disperses the contact pressure of the cutting edge and reduces stress concentration; at the same time, it reduces the vertical impact of hard crystals (such as silicates) on the cutting edge, alleviates the problem of micro-chipping of the scraper blade, reduces the wear rate of the cutting edge, and extends the service life of the scraper blade. The elastic compensation mechanism provides a pre-tightening force to the blade mounting seat, pressing against the inner wall of the cylinder. This ensures that the scraper blade is always in close contact with the inner wall of the cylinder. Even when the blade wears or the thickness of the crystal layer changes, it can compensate through elastic deformation, avoiding a decrease in scraping effect due to poor contact, and further ensuring the thoroughness and stability of scraping. Attached Figure Description

[0012] Figure 1 This is a front view of the present utility model; Figure 2 This is a schematic diagram of the usage state of this utility model; Figure 3 This is a schematic diagram of the structure of this utility model; Explanation of symbols in the diagram: 1. Tool holder body; 2. Side panels; 3. Rotating arm; 4. Blade mounting base; 41. Blade clamp; 5. Scraper blade; 6. Elastic compensation mechanism; 61. Guide support; 62. Preload spring; 63. Guide hole; 7. Cylinder body; 8. External support structure. Detailed Implementation

[0013] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0014] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0015] like Figure 1 , 2 As shown in Figure 3, a scraper structure for removing crystals from the inner wall of a cylinder includes: Tool holder body 1; Side uprights 2 are fixedly installed at both ends of the tool holder body 1; Rotating arm 3, one end of which is rotatably mounted on the side plate 2; Blade mounting base 4, which is fixedly mounted on the rotating arm 3; Scraper blade 5, the scraper blade 5 is mounted on the blade mounting base 4; An elastic compensation mechanism 6 is also provided, which is located between the blade mounting seat 4 and the blade holder body 1; the rotation of the rotating arm 3 causes the cutting edge of the scraper blade 5 to form a non-90-degree inclination angle with the inner wall of the cylinder 7, and the elastic compensation mechanism 6 is used to provide a pre-tightening force to the blade mounting seat 4 pressing against the inner wall of the cylinder 7.

[0016] Specifically, the blade holder body 1 is fixed to the external support structure 8, providing a mounting base for other components. Two side plates 2 are fixedly installed at both ends of the blade holder body 1, forming a stable overall frame. One end of the rotating arm 3 is rotatably mounted on the side plate 2, allowing it to rotate flexibly around the side plate 2, so that the blade mounting seat 4 rotates synchronously with the rotating arm 3. The scraper blade 5 is mounted on the blade mounting seat 4, directly facing the inner wall of the rotating cylinder 7, and is the actuating component for scraping away crystals. An elastic compensation mechanism 6 connects the blade mounting seat 4 and the blade holder body 1, with one end connected to the blade mounting seat 4 and the other end connected to the blade holder body 1, providing force to the blade mounting seat 4. Through the rotation of the rotating arm 3, the cutting edge of the scraper blade 5 forms a non-90-degree angle with the inner wall of the rotating cylinder 7. When the cylinder 7 rotates, because the blade holder body 1 is fixed to the external support structure 8, the entire scraper structure remains stationary relative to the cylinder 7. During the rotation of the cylinder 7, the rotating arm 3 adapts to the contact between the scraper blade 5 and the crystallized layer on the inner wall of the cylinder 7, ensuring that the cutting edge of the scraper blade 5 maintains contact with the inner wall of the cylinder 7 at a certain angle. Simultaneously, the elastic compensation mechanism 6 continuously applies a preload force to the blade mounting seat 4, pressing against the inner wall of the cylinder 7. This preload force is transmitted to the scraper blade 5 through the blade mounting seat 4, ensuring that the scraper blade 5 fits tightly against the inner wall of the cylinder 7. As the cylinder 7 rotates, the scraper blade 5 generates a cutting force using the angle between itself and the inner wall, scraping away the crystallized layer on the inner wall of the cylinder 7. When the scraper blade 5 wears down, or when the thickness of the crystallized layer on the inner wall of the cylinder 7 changes, the elastic compensation mechanism 6 undergoes elastic deformation, compensating for the gaps caused by these changes through its own expansion and contraction, ensuring that the scraper blade 5 maintains effective contact with the inner wall of the cylinder 7 and continues the scraping work. In this application, by setting a rotating arm 3, the cutting edge of the scraper blade 5 forms a certain angle with the inner wall of the cylinder 7. This changes the situation where, in the traditional case of a scraper blade 5 making 90-degree contact with the inner wall of the cylinder 7, the cutting edge only makes line contact and presses into the crystalline layer. Instead, it forms surface contact, so that the crystalline layer is subjected to cutting action rather than compression. This effectively avoids the problem of ineffective scraping caused by harder crystals lifting the scraper along the contact point between the cutting edge and the cylinder wall, significantly reducing crystal residue and solving the drawback of incomplete scraping in the traditional structure. The non-90-degree angle setting disperses the contact pressure of the cutting edge, avoiding the situation where the contact pressure is concentrated in a very narrow area of ​​the cutting edge when making 90-degree contact in the traditional case, thus reducing stress concentration. At the same time, it reduces the vertical impact of hard crystal points (such as silicates) on the cutting edge, alleviates the problem of micro-chipping of the scraper blade 5, and reduces the wear rate of the cutting edge. Compared with the traditional 90-degree contact scraper, it extends the service life of the scraper blade 5.The elastic compensation mechanism 6 provides a pre-tightening force to the blade mounting seat 4, pressing against the inner wall of the cylinder 7. This ensures that the scraper blade 5 is always in close contact with the inner wall of the cylinder 7. Even when the blade wears or the thickness of the crystal layer changes, it can compensate through elastic deformation, avoiding a decrease in scraping effect due to poor contact, and further ensuring the thoroughness and stability of scraping.

[0017] like Figure 1 As shown, rotating arms 3 are provided on both sides of the side plate 2, and scraper blades 5 are respectively installed on the two rotating arms 3. The scraper blades 5 on both sides form a symmetrical bidirectional scraping structure.

[0018] Specifically, rotating arms 3 are provided on both sides of the side plate 2, and scraper blades 5 are installed on each rotating arm 3 to form a symmetrical bidirectional scraping structure. Regardless of whether the rotating cylinder 7 rotates forward or backward, the scraper blades 5 on both sides can generate effective cutting force by means of the inclination angle with the inner wall of the cylinder 7, so as to realize the function of bidirectional scraping and crystal removal.

[0019] like Figure 1 , 3 As shown, the elastic compensation mechanism 6 includes a guide post 61 and a preload spring 62; the upper end of the guide post 61 is hinged to the blade mounting seat 4, and the lower end passes through the guide hole 63 provided on the blade holder body 1; the preload spring 62 is sleeved on the guide post 61 and is located between the blade holder body 1 and the blade mounting seat 4.

[0020] Specifically, the upper end of the guide pillar 61 is hinged to the blade mounting seat 4. The hinge structure allows the guide pillar 61 to flexibly adjust its angle as the rotating arm 3 drives the blade mounting seat 4 to rotate, avoiding stress interference caused by the rigid connection between the pillar and the blade mounting seat 4, and ensuring that the rotating arm 3 can smoothly adjust the tilt angle of the scraper blade 5. The guide hole 63 provides stable guidance for the guide pillar 61, preventing it from deviating under the action of the spring force, and ensuring that the elastic force of the pre-tension spring 62 always acts on the blade mounting seat 4 in a reasonable direction. The pre-tension spring 62, with the help of the guide pillar, expands and contracts stably, continuously providing pre-tension force, and timely compensates for the gap when the blade wears or the crystal layer changes, so that the scraper blade 5 always fits tightly against the inner wall of the cylinder 7. This not only meets the tilt angle adjustment requirements, but also enhances the reliability of elastic compensation and improves the stability of the scraping effect.

[0021] like Figure 1 , 3 As shown, there are four rotating arms 3 and four guide pillars 61, two on each side, which are symmetrically arranged on both sides of the side plate 2.

[0022] Specifically, the four guide pillars 61 correspond to four pre-tension springs 62 (two on each side forming a double-spring structure). By compressing the double springs, the pressure can be flexibly adjusted within the range of 0.8 to 3.2 kN. This allows for precise adaptation to the scraper pressure requirements of materials with different viscosities. For high-viscosity materials, the pressure can be increased to ensure thorough scraping, while for low-viscosity materials, the pressure can be reduced to avoid excessive scraping and damage to the cylinder wall. At the same time, the synergistic effect of multiple sets of springs and guide pillars 61 can more evenly transmit the pre-tension force to the blade mounting seat 4, ensuring the consistency of contact between the scraper blade 5 and the inner wall of the cylinder 7, further improving the stability and adaptability of the scraping effect.

[0023] like Figure 1 , 2 As shown, the angle between the scraper blade 5 and the inner wall of the cylinder 7 ranges from 20° to 40°.

[0024] Specifically, an inclination angle of 20° to 40° can reduce drag, lower the coefficient of sliding friction, reduce energy consumption, and adapt to crystalline layers of different hardness and thickness. While ensuring thorough scraping, it avoids excessive blade embedding due to an angle that is too small or insufficient scraping force due to an angle that is too large, thus balancing scraping efficiency and blade life.

[0025] like Figure 1 , 3 As shown, it also includes a pressure blade 41, which is a plate-shaped structure adapted to the shape of the scraper blade 5. The pressure blade 41 is fixedly connected to the blade mounting base 4 by at least two bolts, and the scraper blade 5 is fixed on the blade mounting base 4 by the pressure blade 41 and the bolts.

[0026] Specifically, the pressure blade 41 adopts a plate-like structure adapted to the shape of the scraper blade 5, and is fixed to the blade mounting base 4 by at least two bolts, thereby fixing the scraper blade 5 in place. This securely clamps the scraper blade 5 between the pressure blade 41 and the blade mounting base 4, preventing the scraper blade 5 from loosening or shifting due to force during the scraping of crystals, ensuring the stability of the scraping process. Simultaneously, it facilitates the disassembly and replacement of the scraper blade 5. When the blade wears out, simply loosen the bolts and remove the pressure blade 41 for quick replacement with a new blade, reducing maintenance difficulty and cost. The multi-point fixing method allows for more even force distribution on the scraper blade 5, reducing deformation or damage caused by localized stress concentration and extending the service life of the scraper blade 5.

[0027] This invention discloses a scraper structure for removing crystals from the inner wall of a cylinder. When the cylinder 7 rotates, the entire scraper structure remains stationary relative to the cylinder 7 because the scraper holder body 1 is fixed to the external support structure 8. During the rotation of the cylinder 7, the rotating arm 3 adapts to the contact between the scraper blade 5 and the crystals on the inner wall of the cylinder 7, ensuring that the cutting edge of the scraper blade 5 always maintains contact with the inner wall of the cylinder 7 at a certain angle. Simultaneously, the elastic compensation mechanism 6 continuously applies a preload force pressing against the inner wall of the cylinder 7 to the blade mounting seat 4. This preload force is transmitted to the scraper blade 5 through the blade mounting seat 4, ensuring that the scraper blade 5 can fit tightly against the inner wall of the cylinder 7. When the cylinder 7 rotates, the scraper blade 5 generates cutting force by using the angle between itself and the inner wall to scrape away the crystals on the inner wall of the cylinder 7. When the scraper blade 5 wears down, or when the thickness of the crystal layer on the inner wall of the cylinder 7 changes, the elastic compensation mechanism 6 will undergo elastic deformation and compensate for the gap caused by these changes through its own extension and contraction, ensuring that the scraper blade 5 always maintains effective contact with the inner wall of the cylinder 7 and continues to perform scraping work. In this application, by setting a rotating arm 3, the cutting edge of the scraper blade 5 forms a certain angle with the inner wall of the cylinder 7. This changes the situation where, in the traditional case of a scraper blade 5 making 90-degree contact with the inner wall of the cylinder 7, the cutting edge only makes line contact and presses into the crystalline layer. Instead, it forms surface contact, so that the crystalline layer is subjected to cutting action rather than compression. This effectively avoids the problem of ineffective scraping caused by harder crystals lifting the scraper along the contact point between the cutting edge and the cylinder wall, significantly reducing crystal residue and solving the drawback of incomplete scraping in the traditional structure. The non-90-degree angle setting disperses the contact pressure of the cutting edge, avoiding the situation where the contact pressure is concentrated in a very narrow area of ​​the cutting edge when making 90-degree contact in the traditional case, thus reducing stress concentration. At the same time, it reduces the vertical impact of hard crystal points (such as silicates) on the cutting edge, alleviates the problem of micro-chipping of the scraper blade 5, and reduces the wear rate of the cutting edge. Compared with the traditional 90-degree contact scraper, it extends the service life of the scraper blade 5. The elastic compensation mechanism 6 provides a pre-tightening force to the blade mounting seat 4, pressing against the inner wall of the cylinder 7. This ensures that the scraper blade 5 is always in close contact with the inner wall of the cylinder 7. Even when the blade wears or the thickness of the crystal layer changes, it can compensate through elastic deformation, avoiding a decrease in scraping effect due to poor contact, and further ensuring the thoroughness and stability of scraping.

[0028] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

Claims

1. A scraper structure for removing crystals from the inner wall of a cylinder, comprising: Tool holder body (1); Side uprights (2), which are fixedly installed at both ends of the tool holder body (1); A rotating arm (3), one end of which is rotatably mounted on the side plate (2); Blade mounting base (4), the blade mounting base (4) is fixedly mounted on the rotating arm (3); Scraper blade (5), the scraper blade (5) is mounted on the blade mounting base (4); Its features are: An elastic compensation mechanism (6) is also provided, which is located between the blade mounting seat (4) and the blade holder body (1); the rotation of the rotating arm (3) causes the cutting edge of the scraper blade (5) to form a non-90-degree inclination angle with the inner wall of the cylinder (7), and the elastic compensation mechanism (6) is used to provide a pre-tightening force to the blade mounting seat (4) pressing against the inner wall of the cylinder (7).

2. The scraper structure for removing crystals from the inner wall of a cylinder according to claim 1, characterized in that, The side plate (2) is provided with rotating arms (3) on both sides, and scraper blades (5) are respectively installed on the two rotating arms (3). The scraper blades (5) on both sides form a symmetrical bidirectional scraping structure.

3. The scraper structure for removing crystals from the inner wall of a cylinder according to claim 1, characterized in that, The elastic compensation mechanism (6) includes a guide post (61) and a preload spring (62); the upper end of the guide post (61) is hinged to the blade mounting seat (4), and the lower end passes through the guide hole (63) provided on the blade holder body (1); the preload spring (62) is sleeved on the guide post (61) and located between the blade holder body (1) and the blade mounting seat (4).

4. The scraper structure for removing crystals from the inner wall of a cylinder according to claim 3, characterized in that, The rotating arm (3) and the guide pillar (61) are each provided in fours, two on each side, and are symmetrically arranged on both sides of the side plate (2).

5. The scraper structure for removing crystals from the inner wall of a cylinder according to claim 1, characterized in that, The angle between the scraper blade (5) and the inner wall of the cylinder (7) is in the range of 20° to 40°.

6. The scraper structure for removing crystals from the inner wall of a cylinder according to claim 1, characterized in that, It also includes a pressure blade (41), which is a plate-shaped structure adapted to the shape of the scraper blade (5). The pressure blade (41) is fixedly connected to the blade mounting seat (4) by at least two bolts. The scraper blade (5) is fixed on the blade mounting seat (4) by the pressure blade (41) and the bolts.

7. The scraper structure for removing crystals from the inner wall of a cylinder according to claim 5, characterized in that, The angle between the scraper blade (5) and the inner wall of the cylinder (7) is 30°.

8. The scraper structure for removing crystals from the inner wall of a cylinder according to claim 6, characterized in that, The pressure blade (41) is mounted on the blade mounting base by five bolts.

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