An improved scraper

Abstract

An improved scraper includes vertical plates and rings. The upper and lower sides of the vertical plates are respectively fixed to the outer walls of the rings. A scraper structure is connected to the inner wall of each ring. The scraper structure includes a rod and a cylinder. The outer end of the rod is rotatably connected to the inner wall of the ring, and the outer wall of the rod is fixed to the inner wall of the cylinder. This ensures that the left scraper remains in contact with the outer wall of the square heat pipe. After the right scraper moves to the end of the square heat pipe, the vertical plates are pushed to the left. At this time, the vertical plates, together with the left rod and cylinder, move the left scraper to the left, keeping it in contact with the square heat pipe. The left scraper and the vertical plates are then subjected to force, which removes the scale layer from the outer wall of the square heat pipe, thus cleaning the surface of the square heat pipe. This scraper reduces the cost of cleaning heat exchange pipes, reduces labor, and improves the cleaning effect.

Description

Technical Field

[0001] This utility model relates to scrapers, and more particularly to an improved scraper. Background Technology

[0002] In wastewater treatment and various projects using evaporators, the unavoidable presence of calcium, magnesium, and sulfate ions in the wastewater leads to increased hardness during the evaporation process, making scale formation on the heat exchanger surface inevitable. As the scale layer thickens, the heat transfer coefficient decreases, resulting in poor heat exchange performance and a deviation from the design operating conditions, leading to high energy consumption and operating costs. Current descaling methods for heat exchangers include chemical cleaning, high-pressure water flushing, and physical methods such as brushing. However, chemical cleaning requires large quantities of chemicals, is time-consuming, and results in long downtime and high costs. High-pressure water flushing is typically combined with chemical cleaning, which is labor-intensive and expensive. Physical methods like brushing are currently not ideal. Therefore, a scraper for heat exchanger tubes is designed to address the problems of high cleaning costs, high labor intensity, and unsatisfactory cleaning results. Summary of the Invention

[0003] This invention aims to solve the problems existing in the prior art by providing an improved scraper that reduces the cost of cleaning heat exchange tubes, reduces labor, and improves the cleaning effect.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: This improved scraper includes vertical plates and rings. The upper and lower sides of the multiple vertical plates are respectively fixed to the outer walls of the multiple rings. A scraper structure is connected to the inner wall of the rings. The scraper structure includes a round rod and a cylinder. The outer end of the round rod is rotatably connected to the inner wall of the ring. The outer wall of the round rod is fixed to the inner wall of the cylinder. A scraper is fixed to the outer wall of the cylinder. A spring is engaged with the outer opening of the scraper.

[0005] In this setup, the blade and spring are made of the same material as the heat exchange tube. The blade is pressed against the heat exchange tube by the tension of the spring, which pushes the entire blade to rub back and forth on the surface of the heat exchange tube, ensuring that the metal surface is smooth.

[0006] To further improve the design, vertical plates are fixedly connected to the front and rear sides of the scraper.

[0007] This feature allows the vertical plates on both sides of the scraper to clean the edges of the square heat pipe, achieving cleaning of all four sides of the square heat pipe.

[0008] To further improve the design, two square plates are fixedly attached to the inner sides of the vertical plates, one above the other.

[0009] This design allows the two square plates to support multiple vertical plates, preventing the vertical plates from deforming or being damaged.

[0010] To further improve the design, a square heat-conducting pipe is attached to the inner side of the square plate.

[0011] With this feature, the square plate can move left and right on the outer wall of the square heat pipe under stress, and at this time the square plate can also remove the scale layer on the outer wall of the square heat pipe.

[0012] Further improvements include ensuring that the outer wall of the square box heat-conducting pipe is in contact with the end of the scraper.

[0013] Further improvements were made, such that the outer wall of the square box heat-conducting pipe is fitted to the outer wall of the vertical plate.

[0014] To further improve the design, a horizontal plate is fixed to the inner side of each of the aforementioned rings.

[0015] This design allows the horizontal plate to support the ring, while simultaneously providing support to the outer end of the vertical plate, preventing deformation and damage to the ends of the vertical plate and the ring.

[0016] The beneficial effects of this utility model are as follows: In this utility model, the vertical plate, in conjunction with the round rod and cylinder in the scraper structure, moves the scraper to the right. At this time, the scraper on the right side is pushed and moves to the right against the outer wall of the square heat-conducting tube. The scraper, along with the vertical plate, scrapes off the scale layer on the outer wall of the square heat-conducting tube. At this time, the scraper on the left side is not under force, and is pulled by the spring, so that the scraper on the left side is always in contact with the outer wall of the square heat-conducting tube. After the scraper on the right side moves to the end of the square heat-conducting tube, the vertical plate is pushed to the left. At this time, the vertical plate, in conjunction with the left round rod and cylinder, moves the scraper on the left side against the square heat-conducting tube to the left. At this time, the scraper on the left side and the vertical plate are under force and scrape off the scale layer on the outer wall of the square heat-conducting tube, thus completing the cleaning of the surface of the square heat-conducting tube. The scraper reduces the cleaning cost of the heat exchange tube, reduces labor, and improves the cleaning effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 for Figure 1 A schematic diagram showing the connection relationship between the central vertical plate, the square plate, and the square heat pipe;

[0019] Figure 3 for Figure 1 A schematic diagram showing the connection relationship between the central vertical plate, the circular ring, and the circular rod;

[0020] Figure 4 for Figure 1 Schematic diagram of the connection structure between the middle cylinder and the scraper;

[0021] Figure 5for Figure 1 A schematic diagram of the connection structure of the springs.

[0022] Explanation of reference numerals in the attached diagram: 1. Vertical plate, 2. Scraper structure, 201. Round rod, 202. Cylinder, 203. Scraper, 204. Spring, 3. Ring, 4. Square plate, 5. Square heat pipe, 6. Vertical plate, 7. Horizontal plate. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] See attached document Figure 1-5 In this embodiment, an improved scraper includes vertical plates 1 and rings 3. The upper and lower sides of multiple vertical plates 1 are respectively fixed to the outer walls of multiple rings 3. The inner wall of the rings 3 is connected to a scraper structure 2. The scraper structure 2 includes a round rod 201 and a cylinder 202. The outer end of the round rod 201 is rotatably connected to the inner wall of the ring 3. The round rod 201 rotates under force through the bearing on the inner wall of the ring 3. The outer wall of the round rod 201 is fixed to the inner wall of the cylinder 202. A scraper 203 is fixed to the outer wall of the cylinder 202. A spring 204 is snapped into the opening on the outer wall of the scraper 203. The scraper 203, the spring 204 and the square heat-conducting pipe 5 are all made of stainless steel.

[0025] The scraper structure 2 uses a vertical plate 1, a round rod 201, and a cylinder 202 to move the scraper 203 to the right. At this time, the right scraper 203 is pushed against the outer wall of the square heat pipe 5 and moves to the right. The scraper 203, along with the vertical plate 6, scrapes off the scale layer on the outer wall of the square heat pipe 5. Meanwhile, the left scraper 203 is not under force, but is pulled by the spring 204, keeping it in contact with the outer wall of the square heat pipe 5. After the right scraper 203 moves to the end of the square heat pipe 5, the vertical plate 1 is pushed to the left. The vertical plate 1, along with the left round rod 201 and cylinder 202, moves the left scraper 203 against the square heat pipe 5 to the left. The left scraper 203 and the vertical plate 6 are then subjected to force, removing the scale layer from the outer wall of the square heat pipe 5, thus completing the cleaning of the surface of the square heat pipe 5. This scraper method reduces the cost of cleaning the heat exchanger tube, reduces labor, and improves the cleaning effect.

[0026] Vertical plates 6 are fixed to the front and rear sides of the scraper 203, respectively. The vertical plates 6 are made of the same stainless steel as the scraper. Two square plates 4 are fixed to the inner sides of the multiple vertical plates 1, respectively. A square heat-conducting pipe 5 is attached to the inner side of the square plate 4. The outer wall of the square heat-conducting pipe 5 is attached to the end of the scraper 203. The outer wall of the square heat-conducting pipe 5 is attached to the outer wall of the vertical plate 6. A horizontal plate 7 is fixed to the inner side of the multiple rings 3. The two ends of the horizontal plate 7 support the rings, preventing the rings 3 from bending and deforming.

[0027] Working principle:

[0028] Scraper installation:

[0029] Rotate the scraper 203 outwards. At this time, the scraper 203, along with the black cylinder 202 and the round rod 201, rotates on the inner wall of the ring 3. The rotating scraper 203 stretches the spring 204. Then, the space formed by the two square plates 4 and the multiple vertical plates 1 is placed on one side of the outer wall of the square heat-conducting pipe 5. Then, release the scraper 203. The spring 204 provides a rebound force, causing the scraper 203 and the cylinder 202, along with the round rod 201, to rotate inwards on the ring 3. This causes the end of the scraper 203 to fit against the outer wall of the square heat-conducting pipe 5, while the outer wall of the vertical plate 6 fits against the side of the outer wall of the square heat-conducting pipe 5.

[0030] Scraper usage:

[0031] Push the vertical plate 1 to the right. The vertical plate 1, together with the round rod 201 and the cylinder 202, moves the scraper 203 to the right. At this time, the scraper 203 on the right side is pushed and moves to the right on the outer wall of the square heat pipe 5. The scraper 203, along with the vertical plate 6, scrapes off the scale on the outer wall of the square heat pipe 5. At this time, the scraper 203 on the left side is not under force, and the scraper 203 on the left side is pulled by the spring 204, so that the scraper on the left side is always in contact with the outer wall of the square heat pipe 5. After the scraper 203 on the right side moves to the end of the square heat pipe 5, push the vertical plate 1 to the left. At this time, the vertical plate 1, together with the round rod 201 and the cylinder 202 on the left side, moves the scraper 203 on the left side in contact with the square heat pipe 5 and moves to the left. At this time, the scraper 203 on the left side and the vertical plate 6 are under force and scrape off the scale on the outer wall of the square heat pipe 5, thus completing the cleaning of the surface of the square heat pipe 5.

[0032] Scraper spring replacement:

[0033] When the spring force coefficient of spring 204 is insufficient, pull one end of spring 204 outward, at which point spring 204 is stretched. Then, let the stretched side of spring 204 pass through the opening on the outer wall of scraper 203, and then release spring 204. Spring 204 will retract due to its elastic force. Then, remove the other side of spring 204 from the opening of scraper 203. Next, pass one end of a new spring 204 through the opening on the outer wall of the left scraper 203, and then pull the other end of spring 204 so that the other end of spring 204 passes through the opening on the outer wall of the right scraper 203, thus fixing spring 204 at the center of the two scrapers 203.

[0034] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. An improved doctor blade comprising a vertical plate (1) and a circular ring (3), characterized in that: The upper and lower sides of the multiple vertical plates (1) are respectively fixed to the outer walls of multiple rings (3), and the inner walls of the rings (3) are connected to scraper structures (2). The scraper structure (2) includes a round rod (201) and a cylinder (202). The outer end of the round rod (201) is rotatably connected to the inner wall of the ring (3). The outer wall of the round rod (201) is fixedly connected to the inner wall of the cylinder (202). A scraper (203) is fixedly connected to the outer wall of the cylinder (202). A spring (204) is engaged with the opening on the outer wall of the scraper (203).

2. The improved scraper according to claim 1, characterized in that: The scraper (203) has vertical plates (6) fixed to its front and rear sides respectively.

3. The improved scraper according to claim 1, characterized in that: Two square plates (4) are fixedly attached to the inner sides of the multiple vertical plates (1) respectively.

4. The improved scraper according to claim 3, characterized in that: A square heat pipe (5) is attached to the inner side of the square plate (4).

5. The improved scraper according to claim 4, characterized in that: The outer wall of the square heat pipe (5) is in contact with the end of the scraper (203).

6. The improved scraper according to claim 4, characterized in that: The outer wall of the square heat pipe (5) is attached to the outer wall of the vertical plate (6).

7. The improved scraper according to claim 1, characterized in that: A horizontal plate (7) is fixed to the inner side of each of the multiple rings (3).

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