An ink pipeline cleaning device

Abstract

This utility model discloses an ink pipeline cleaning device, belonging to the field of optical fiber coloring cleaning technology. It includes a cleaning tank, a circulating cleaning component, an air drying component, and a filtration cleaning component. The circulating cleaning component for circulating cleaning is installed on the cleaning tank. The circulating cleaning component is connected to the air drying component for drying the pipeline and the filtration cleaning component for filtering wastewater. The circulating cleaning component includes a fixed component, a mixed liquid circulation component, and a floating liquid addition component. The fixed component is installed on the cleaning tank, and the mixed liquid circulation component and the floating liquid addition component are both connected to the fixed component. Through the above method, multiple ink pipelines can be cleaned simultaneously, and alcohol can be recycled.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber coloring and cleaning technology, specifically to an ink pipeline cleaning device. Background Technology

[0002] When changing inks in optical fiber coloring production, the ink pipeline needs to be cleaned. The existing cleaning method is to soak the pipeline in an alcohol-containing solvent and then let the solvent flow through the pipeline multiple times to achieve the cleaning purpose.

[0003] Chinese patent CN220092401U discloses a pipe flushing device, relating to the field of pipe cleaning technology. It includes a base plate and two sets of annular pipes. A water pump is mounted on the front of the base plate, and the water pump has an inlet that can connect to a water supply pipe. A connecting pipe is fixedly connected between the water pump and the annular pipes. This pipe flushing device, through the cooperation of the annular pipes, sliding blocks, servo motor, and threaded rod, allows the pipe to be fixed inside the annular pipes. The water pump can then input water into the annular pipes through the connecting pipe, ultimately spraying and flushing the outside of the pipes through nozzles inside the annular pipes. Simultaneously, the servo motor starts and drives the threaded rod through a groove inside the base plate via its drive shaft. This, in turn, pushes the two sets of sliding blocks to move through the threads on the outside of the threaded rod, thus moving the annular pipes. However, this device still has the following problems: The cleaning efficiency is slow, and it is difficult to clean the inside of the pipes. It is not suitable for cleaning ink tubes, cannot clean multiple ink tubes at the same time, and cannot achieve the recycling of cleaning agents.

[0004] Based on this, the present invention designs an ink pipeline cleaning device to solve the above problems. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an ink pipeline cleaning device.

[0006] To achieve the above objectives, this utility model provides the following technical solution: An ink pipeline cleaning device includes a cleaning tank, and further includes a circulating cleaning component, an air drying component, and a filter cleaning component; A circulating cleaning assembly for circulating cleaning is installed on the cleaning tank. The circulating cleaning assembly is connected to an air drying assembly for drying the pipes and a filter cleaning assembly for filtering wastewater. The circulating cleaning assembly includes a fixed assembly, a mixed liquid circulation assembly, and a floating liquid addition assembly. The fixed assembly is installed on the cleaning tank, and the mixed liquid circulation assembly and the floating liquid addition assembly are both connected to the fixed assembly. Furthermore, the fixing assembly includes mounting heads, flushing valves, and connecting blocks. Multiple mounting heads pass through the side wall of the cleaning tank and are fixedly connected to the cleaning tank. One end of each mounting head is fixedly fitted with a flushing valve, and the other end of the mounting head is threadedly connected to an ink pipe. All flushing valves are fixedly mounted on the connecting blocks.

[0007] Furthermore, the mixed liquid circulation assembly includes a main pipe, an explosion-proof pump, a mixed liquid discharge pipe, a filtered water pipe, and a drain valve. The main pipe is fixedly connected to the connecting block and the explosion-proof pump. One end of the mixed liquid discharge pipe is fixedly connected to the lower end of the cleaning tank, and the other end of the mixed liquid discharge pipe is connected to the filter cleaning assembly. One end of the filtered water pipe is connected to the filter cleaning assembly, and the other end of the filtered water pipe is fixedly connected to the explosion-proof pump. The drain valve is fixedly connected to the explosion-proof pump.

[0008] Furthermore, the floating liquid addition assembly includes a floating level gauge, an explosion-proof pump II, an alcohol three-way valve, and an alcohol pipeline. The floating level gauge is fixedly installed inside the cleaning tank, the alcohol three-way valve is fixedly installed on the main pipeline, and both ends of the alcohol pipeline are fixedly connected to the alcohol three-way valve and the explosion-proof pump II, respectively.

[0009] Furthermore, the air drying assembly includes an air compressor, an air valve, and an air duct. The air valve is fixedly mounted on the connecting block, and one end of the air valve is fixedly connected to the air duct, while the other end of the air duct is fixedly connected to the air compressor.

[0010] Furthermore, the filter cleaning assembly includes a filter assembly and a cleaning assembly. The filter assembly is connected to the mixed liquid discharge pipe and the filtered water pipe, respectively, and the cleaning assembly is installed inside the filter assembly.

[0011] Furthermore, the filtration assembly includes a filter box, a cover plate, rotating rollers, a filter screen, and a rotating handle. The cover plate is hinged to the top of the filter box, and the mixed liquid discharge pipe is fixedly installed on the upper left side of the filter box. The filtered water pipe is fixedly installed on the lower right side of the filter box. There are two rotating rollers, and each of the rotating rollers is rotatably connected to the upper end of the filter box via a rotating shaft. The rotating rollers are located below the mixed liquid discharge pipe. The filter screen is wound around the two rotating rollers, and the two rotating rollers are connected by a filter screen drive. One rotating roller passes through the inner wall of the filter box and is fixedly connected to the rotating handle.

[0012] Furthermore, the cleaning assembly includes a scraper, a collection box, and a pull handle. The scraper is fixedly installed inside the filter box, located below the rotating roller, and abuts against the rotating roller. Slide grooves for limiting the movement of the collection box are provided on the scraper and the filter box. The collection box is slidably connected to the filter box and the scraper respectively. The pull handle is fixedly installed on the collection box.

[0013] Compared with the prior art, the advantages of this utility model are as follows: 1. In this utility model, multiple ink tubes are installed on a fixed assembly, an appropriate amount of alcohol is added to the cleaning tank through a floating liquid adding assembly to rinse the ink tubes, the mixed liquid after rinsing is filtered through a filtration and cleaning assembly, the ink tubes are rinsed again through a mixed liquid circulation assembly, the rinsed ink tubes are dried through an air drying assembly, and the liquid in the cleaning tank is replenished through a floating liquid adding assembly. 2. In this utility model, multiple ink tubes can be installed on the mounting head. The flushing valve is opened, and the alcohol three-way valve is adjusted to connect the main pipeline to the alcohol pipeline. An appropriate amount of alcohol is injected from an external alcohol storage tank into the alcohol pipeline via the explosion-proof pump two. The alcohol flows through the alcohol pipeline to the main pipeline, then into the connecting block, and from the connecting block through the flushing valve into the mounting head containing the ink tubes for continuous flushing. When the floating level gauge in the cleaning tank reaches the designated level, the alcohol three-way valve is closed, and the valve on the mixed liquid discharge pipeline is opened, allowing the mixed liquid to flow out. The mixed liquid falls into the filter cleaning assembly through the mixed liquid discharge pipeline to filter out impurities and solids in the mixed liquid. The filtered liquid is then pumped out by the explosion-proof pump one, flows through the main pipeline, and returns to the mounting head to clean the ink tubes again, achieving long-term continuous cyclic flushing. After the cyclic cleaning is completed, the system is first closed... The valve on the mixed liquid discharge pipeline allows the explosion-proof pump one to pump the filtered liquid from the filter cleaning assembly into the main pipeline and into the cleaning tank. At this time, the alcohol three-way valve is reopened, and the explosion-proof pump two continues to inject alcohol from the external alcohol storage tank into the alcohol pipeline, delivering new alcohol into the main pipeline to perform a final rinse on the ink tube, preventing the mixed liquid from affecting the ink tube. At the same time, the water level in the cleaning tank is observed through the floating level gauge connected to the central control system. When the water level reaches or is slightly higher than the preset water level, the alcohol three-way valve is closed, and the air drying assembly dries the connecting block and ink tube, ultimately achieving the cleaning and drying of the ink tube. After multiple cycles, the valve on the mixed liquid discharge pipeline is opened, allowing the mixed liquid in the cleaning tank to flow into the filter cleaning assembly. The explosion-proof pump one then pumps the liquid out of the filter cleaning assembly and discharges it through the drain valve. 3. In this utility model, after rinsing the ink tube with new alcohol, the air valve is opened so that the compressed air in the air compressor enters the connecting block from the air pipe and finally blows onto the ink tube through the connecting block to dry the inner wall of the ink tube, thereby blowing away excess liquid from the inner wall of the ink tube and keeping the inner wall of the ink tube dry. 4. In this utility model, after cleaning, when the mixed liquid flows into the filter box through the mixed liquid discharge pipe, the mixed liquid is filtered through the filter screen. After filtration, it is drawn away by the explosion-proof pump through the filter water pipe. The mixed liquid that has been used multiple times is discharged through the drain valve on the explosion-proof pump. After the filter screen has been used for a period of time, the rotating handle can be turned clockwise, so that the filter screen rotates with the two rotating rollers. The scraper scrapes away the impurities on the filter screen and they fall into the collection box. After the collection box is pulled out by pulling the handle to clean the impurities, it is reinserted into the scraper. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This utility model provides a three-dimensional ink pipeline cleaning device. Figure 1 ; Figure 2 This is a front view of an ink pipeline cleaning device according to the present invention; Figure 3 This utility model provides a three-dimensional ink pipeline cleaning device. Figure 2 ; Figure 4 This is a schematic diagram of the filter assembly. Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0016] The labels in the diagram represent: 1. Cleaning tank; 2. Circulating cleaning assembly; 21. Fixing assembly; 211. Mounting head; 212. Flushing valve; 213. Connecting block; 22. Mixed liquid circulation assembly; 221. Main pipeline; 222. Explosion-proof pump one; 223. Mixed liquid discharge pipeline; 224. Filtered water pipeline; 225. Drain valve; 23. Floating liquid addition assembly; 231. Floating level gauge; 232. Explosion-proof pump two; 233. Alcohol three-way valve; 234. Alcohol pipeline; 3. Air drying assembly; 31. Air compressor; 32. Air valve; 33. Air pipeline; 4. Filter cleaning assembly; 41. Filter assembly; 411. Filter box; 412. Cover plate; 413. Rotating roller; 414. Filter screen; 415. Rotating handle; 42. Cleaning assembly; 421. Scraper; 422. Collection box; 423. Pull-out handle; 5. Ink tube. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0019] Example 1: In some embodiments, please refer to the accompanying drawings. Figures 1-5 An ink pipeline cleaning device includes a cleaning tank 1, a circulating cleaning component 2, an air drying component 3, and a filter cleaning component 4; A circulating cleaning assembly 2 for circulating cleaning is installed on the cleaning tank 1. The circulating cleaning assembly 2 is connected to an air drying assembly 3 for drying the pipes and a filter cleaning assembly 4 for filtering wastewater. The circulating cleaning assembly 2 includes a fixed assembly 21, a mixed liquid circulation assembly 22, and a floating liquid addition assembly 23. The fixed assembly 21 is installed on the cleaning tank 1, and the mixed liquid circulation assembly 22 and the floating liquid addition assembly 23 are both connected to the fixed assembly 21.

[0020] In this invention, multiple ink tubes 5 are mounted on a fixed assembly 21. An appropriate amount of alcohol is added to the cleaning tank 1 through a floating liquid addition assembly 23 to rinse the ink tubes 5. The mixed liquid after rinsing is filtered by a filtration and cleaning assembly 4. The ink tubes 5 are rinsed again by a mixed liquid circulation assembly 22. The rinsed ink tubes 5 are dried by an air drying assembly 3. The liquid in the cleaning tank 1 is replenished by the floating liquid addition assembly 23.

[0021] The fixing component 21 includes a mounting head 211, a flushing valve 212, and a connecting block 213. Multiple mounting heads 211 pass through the side wall of the cleaning tank 1 and are fixedly connected to the cleaning tank 1. A flushing valve 212 is fixedly installed at one end of each mounting head 211, and the other end of the mounting head 211 is threadedly connected to the ink tube 5. The flushing valves 212 are all fixedly installed on the connecting block 213.

[0022] The mixed liquid circulation assembly 22 includes a main pipe 221, an explosion-proof pump 222, a mixed liquid discharge pipe 223, a filtered water pipe 224, and a drain valve 225. The main pipe 221 is fixedly connected to the connecting block 213 and the explosion-proof pump 222. One end of the mixed liquid discharge pipe 223 is fixedly connected to the lower end of the cleaning tank 1, and the other end of the mixed liquid discharge pipe 223 is connected to the filter cleaning assembly 4. One end of the filtered water pipe 224 is connected to the filter cleaning assembly 4, and the other end of the filtered water pipe 224 is fixedly connected to the explosion-proof pump 222. The drain valve 225 is fixedly connected to the explosion-proof pump 222.

[0023] The floating liquid addition assembly 23 includes a floating level gauge 231, an explosion-proof pump 232, an alcohol three-way valve 233, and an alcohol pipeline 234. The floating level gauge 231 is fixedly installed inside the cleaning tank 1, the alcohol three-way valve 233 is fixedly installed on the main pipeline 221, and the two ends of the alcohol pipeline 234 are fixedly connected to the alcohol three-way valve 233 and the explosion-proof pump 232, respectively.

[0024] In this embodiment, the explosion-proof pump 232 is fixedly connected to an external alcohol storage tank (not shown in the figure).

[0025] In this embodiment, the connecting block 213 is hollow.

[0026] In this embodiment, a cover plate (not shown in the figure) is hinged to the cleaning tank 1, and a vent is provided on the cover plate. An adsorbent for adsorbing volatile substances is fixedly installed in the vent.

[0027] In this invention, multiple ink tubes 5 can be installed on the mounting head 211. The flushing valve 212 is opened, and the alcohol three-way valve 233 is adjusted to connect the main pipeline 221 with the alcohol pipeline 234. An appropriate amount of alcohol is injected from an external alcohol storage tank into the alcohol pipeline 234 via the explosion-proof pump 232. The alcohol then flows through the alcohol pipeline 234 to the main pipeline 221, and then into the connecting block 213. From the connecting block 213, it passes through the flushing valve 212 and enters the mounting head 211 containing the ink tubes 5, thus cleaning the ink. The ink tube 5 undergoes continuous rinsing. When the floating level gauge 231 in the cleaning tank 1 reaches the designated level, the alcohol three-way valve 233 is closed, and the valve on the mixed liquid discharge pipe 223 is opened to allow the mixed liquid to flow out. The mixed liquid then falls into the filter cleaning assembly 4 through the mixed liquid discharge pipe 223 to filter out impurities and solids in the mixed liquid. The filtered liquid is then pumped out by the explosion-proof pump 222, flows through the main pipe 221, and into the installation head 211 to clean the ink tube 5 again, achieving long-term continuous rinsing. After the cyclic cleaning is completed, the valve on the mixed liquid discharge pipe 223 is closed first, and the explosion-proof pump 222 pumps the filtered liquid from the filter cleaning assembly 4 into the main pipe 221 and into the cleaning tank 1. At this time, the alcohol three-way valve 233 is reopened, and the explosion-proof pump 232 continues to inject alcohol from the external alcohol storage tank into the alcohol pipe 234, supplying new alcohol to the main pipe 221 for a final rinse of the ink tube 5, preventing the mixed liquid from affecting the ink tube 5. Simultaneously, the floating level gauge connected to the central control system... The system 231 observes the water level in the cleaning tank 1. When the water level reaches or is slightly above the preset level, the alcohol three-way valve 233 is closed. The air drying assembly 3 dries the connecting block 213 and the ink tube 5, thus cleaning and drying the ink tube 5. After multiple cycles, the valve on the mixed liquid discharge pipe 223 is opened, allowing the mixed liquid in the cleaning tank 1 to flow into the filter cleaning assembly 4. The explosion-proof pump 222 draws the liquid out of the filter cleaning assembly 4 and discharges it through the drain valve 225.

[0028] The air drying assembly 3 includes an air compressor 31, an air valve 32, and an air duct 33. The air valve 32 is fixedly installed on the connecting block 213, and one end of the air valve 32 is fixedly connected to the air duct 33, while the other end of the air duct 33 is fixedly connected to the air compressor 31.

[0029] In this invention, after rinsing the ink tube 5 with fresh alcohol, the air valve 32 is opened, allowing compressed air from the air compressor 31 to enter the connecting block 213 through the air pipe 33, and finally blown onto the ink tube 5 through the connecting block 213 to dry the inner wall of the ink tube 5, thereby removing excess liquid from the inner wall of the ink tube 5 and keeping the inner wall of the ink tube 5 dry.

[0030] The filter cleaning assembly 4 includes a filter assembly 41 and a cleaning assembly 42. The filter assembly 41 is connected to the mixed liquid discharge pipe 223 and the filtered water pipe 224 respectively, and the cleaning assembly 42 is installed inside the filter assembly 41.

[0031] The filter assembly 41 includes a filter box 411, a cover plate 412, a rotating roller 413, a filter screen 414, and a rotating handle 415. The cover plate 412 is hinged to the top of the filter box 411, and the mixed liquid discharge pipe 223 is fixedly installed on the upper left side of the filter box 411. The filtered water pipe 224 is fixedly installed on the lower right side of the filter box 411. There are two rotating rollers 413, and each of the rotating rollers 413 is rotatably connected to the upper end of the filter box 411 through a rotating shaft. The rotating rollers 413 are located below the mixed liquid discharge pipe 223. The filter screen 414 is wound around the two rotating rollers 413, and the two rotating rollers 413 are connected by transmission through the filter screen 414. One rotating roller 413 passes through the inner wall of the filter box 411 and is fixedly connected to the rotating handle 415.

[0032] The cleaning component 42 includes a scraper 421, a collection box 422, and a pull handle 423. The scraper 421 is fixedly installed inside the filter box 411, located below the rotating roller 413, and the scraper 421 abuts against the rotating roller 413. Sliding grooves for limiting the movement of the collection box 422 are provided on the scraper 421 and the filter box 411. The collection box 422 is slidably connected to the filter box 411 and the scraper 421 respectively. The pull handle 423 is fixedly installed on the collection box 422.

[0033] In this embodiment, all valves are electrically connected to the central control system.

[0034] In this invention, after cleaning, when the mixed liquid flows into the filter box 411 through the mixed liquid discharge pipe 223, it is filtered by the filter screen 414. After filtration, it is drawn away by the explosion-proof pump 222 through the filter water pipe 224. The mixed liquid after multiple uses is discharged through the drain valve 225 on the explosion-proof pump 222. After the filter screen 414 has been used for a period of time, the rotating handle 415 can be turned clockwise, so that the filter screen 414 rotates with the two rotating rollers 413. The scraper 421 scrapes away the impurities on the filter screen 414 and they fall into the collection box 422. The collection box 422 can be pulled out by pulling the handle 423 to clean the impurities and then reinserted into the scraper 421.

[0035] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An ink pipeline cleaning device, comprising a cleaning tank (1), characterized in that: It also includes a circulating cleaning component (2), an air drying component (3), and a filter cleaning component (4); A circulating cleaning assembly (2) for circulating cleaning is installed on the cleaning tank (1). The circulating cleaning assembly (2) is connected to an air drying assembly (3) for drying the pipes and a filter cleaning assembly (4) for filtering wastewater. The circulating cleaning assembly (2) includes a fixed assembly (21), a mixed liquid circulation assembly (22), and a floating liquid addition assembly (23). The fixed assembly (21) is installed on the cleaning tank (1), and the mixed liquid circulation assembly (22) and the floating liquid addition assembly (23) are both connected to the fixed assembly (21).

2. The ink pipeline cleaning device according to claim 1, characterized in that, The fixing component (21) includes a mounting head (211), a flushing valve (212), and a connecting block (213). Multiple mounting heads (211) pass through the side wall of the cleaning tank (1) and are fixedly connected to the cleaning tank (1). A flushing valve (212) is fixedly installed at one end of each mounting head (211), and the other end of the mounting head (211) is threadedly connected to the ink tube (5). The flushing valves (212) are all fixedly installed on the connecting block (213).

3. The ink pipeline cleaning device according to claim 2, characterized in that, The mixed liquid circulation assembly (22) includes a main pipe (221), an explosion-proof pump (222), a mixed liquid discharge pipe (223), a filtered water pipe (224), and a drain valve (225). The main pipe (221) is fixedly connected to the connecting block (213), and the main pipe (221) is fixedly connected to the explosion-proof pump (222). One end of the mixed liquid discharge pipe (223) is fixedly connected to the lower end of the cleaning tank (1), and the other end of the mixed liquid discharge pipe (223) is connected to the filter cleaning assembly (4). One end of the filtered water pipe (224) is connected to the filter cleaning assembly (4), and the other end of the filtered water pipe (224) is fixedly connected to the explosion-proof pump (222). The drain valve (225) is fixedly connected to the explosion-proof pump (222).

4. The ink pipeline cleaning device according to claim 3, characterized in that, The floating liquid addition assembly (23) includes a floating level gauge (231), an explosion-proof pump II (232), an alcohol three-way valve (233), and an alcohol pipeline (234). The floating level gauge (231) is fixedly installed inside the cleaning tank (1), the alcohol three-way valve (233) is fixedly installed on the main pipeline (221), and the two ends of the alcohol pipeline (234) are fixedly connected to the alcohol three-way valve (233) and the explosion-proof pump II (232), respectively.

5. The ink pipeline cleaning device according to claim 2, characterized in that, The air drying assembly (3) includes an air compressor (31), an air valve (32) and an air duct (33). The air valve (32) is fixedly installed on the connecting block (213), and one end of the air valve (32) is fixedly connected to the air duct (33), while the other end of the air duct (33) is fixedly connected to the air compressor (31).

6. The ink pipeline cleaning device according to claim 3, characterized in that, The filter cleaning assembly (4) includes a filter assembly (41) and a cleaning assembly (42). The filter assembly (41) is connected to the mixed liquid discharge pipe (223) and the filtered water pipe (224) respectively, and the cleaning assembly (42) is installed inside the filter assembly (41).

7. The ink pipeline cleaning device according to claim 6, characterized in that, The filter assembly (41) includes a filter box (411), a cover plate (412), a rotating roller (413), a filter screen (414), and a rotating handle (415). The cover plate (412) is hinged to the top of the filter box (411), and the mixed liquid discharge pipe (223) is fixedly installed on the upper left side of the filter box (411). The filtered water pipe (224) is fixedly installed on the lower right side of the filter box (411). There are two rotating rollers (413), and the rotating rollers (413) are rotatably connected to the upper end of the filter box (411) through a rotating shaft. The rotating rollers (413) are located below the mixed liquid discharge pipe (223). The filter screen (414) is wound around the two rotating rollers (413), and the two rotating rollers (413) are connected by transmission through the filter screen (414). One rotating roller (413) passes through the inner wall of the filter box (411) and is fixedly connected to the rotating handle (415).

8. The ink pipeline cleaning device according to claim 7, characterized in that, The cleaning component (42) includes a scraper (421), a collection box (422), and a pull handle (423). The scraper (421) is fixedly installed inside the filter box (411) and located below the rotating roller (413). The scraper (421) abuts against the rotating roller (413). Sliding grooves for limiting the movement of the collection box (422) are provided on the scraper (421) and the filter box (411). The collection box (422) is slidably connected to the filter box (411) and the scraper (421) respectively. The pull handle (423) is fixedly installed on the collection box (422).

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