Piston type scraper

Abstract

The utility model discloses a piston type scraper which is used for scraping the inner wall of a pipeline and comprises an installation shaft and a plurality of scraper blades, the scraper blades are installed on the installation shaft in the radial direction, the outer edges of the scraper blades are attached to the inner wall of the pipeline, and the outer edges of the scraper blades on the outermost sides of the two ends of the installation shaft form a closed arc structure. The scraper blade comprises a large scraper blade, the large scraper blade comprises a large scraper blade, the outer edge of the large scraper blade is attached to the inner wall of the pipeline, the outer edge of the large scraper blade is in an arc shape, and the radian of the arc shape is pi; the scraper blade further comprises a small scraper blade, the small scraper blade comprises a small scraper blade, and the radian of the outer edge of the small scraper blade is 2pi / 3; and the large scraper blades are radially mounted at the two ends of the mounting shaft. The scraper blades are mounted on the mounting shaft in the radial direction and used for scraping the inner wall of a pipeline, and meanwhile, the outer edges of the scraper blades on the outermost sides of the two ends of the mounting shaft form a closed arc structure, so that the inner wall of the pipeline can be scraped clean.

Description

Technical Field

[0001] The utility model relates to the field of refrigerant preparation, in particular to a piston-type scraper. Background Art

[0002] In the field of refrigeration, refrigerants are very common. In the prior art, the common method of using refrigerants is to use a state of the refrigerant, usually in liquid or gaseous state. The two-phase refrigerant referred to in the utility model refers to a state in which solid and liquid are mixed. If water is also used as a refrigerant, it can be understood as an ice-water mixture. In the prior art, the preparation of two-phase refrigerants usually adopts a heat exchanger, and the existing heat exchanger does not have a scraper structure.

[0003] In order to solve the above problems, the present utility model is hereby proposed. Utility Model Content

[0004] The utility model aims to provide a piston-type scraper.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A piston scraper is used to scrape the inner wall of a pipe, comprising a mounting shaft and a plurality of scraper blades. The scraper blades are radially mounted on the mounting shaft, the outer edges of the scraper blades fit against the inner wall of the pipe, and the outer edges of the outermost scraper blades at both ends of the mounting shaft form a closed arc structure.

[0007] Preferably, the scraper blade includes a large scraper blade, and the large scraper blade includes a large scraper blade, the outer edge of the large scraper blade fits against the inner wall of the pipe, the outer edge of the large scraper blade is arc-shaped, and the radian of the arc is π.

[0008] Preferably, the large scraper blades are radially mounted at both ends of the mounting shaft.

[0009] Preferably, the large scraper blade is provided with a notch.

[0010] Preferably, the large scraper blade further comprises a large scraper blade mounting column, the large scraper blade and the large scraper blade mounting column are fixed to each other, and a gap is formed between the large scraper blade and the large scraper blade mounting column.

[0011] Preferably, a large scraper blade mounting hole is provided at the bottom of the large scraper blade mounting column, and a fixing column is provided on the mounting shaft, and the fixing column is plugged into the large scraper blade mounting hole.

[0012] Preferably, a large scraper blade mounting column is installed on the inner surface of the large scraper blade, a large scraper blade mounting column mounting area is provided in the middle of the inner surface of the large scraper blade, and the large scraper blade mounting column is installed on the large scraper blade mounting column mounting area; the large scraper blade as a whole has a structure that is thick in the middle and gradually thins on both sides, and the thickness of the large scraper blade mounting column mounting area is the highest.

[0013] Preferably, the scraper blade further includes a small scraper blade, the small scraper blade includes a small scraper blade, the outer edge of the small scraper blade fits against the inner wall of the pipe, the outer edge of the small scraper blade is arc-shaped, and the radian of the arc is 2π / 3.

[0014] Preferably, the small scraper blades are radially distributed in the middle of the large scraper blades at both ends, and notches are provided on the small scraper blades.

[0015] Preferably, the fixing column is a bolt structure, and the inner walls of the large scraper blade mounting hole and the small scraper blade mounting hole are provided with threaded holes, and the bolt structure and the threaded holes correspond to each other.

[0016] Beneficial technical effects:

[0017] The utility model installs a plurality of scraper blades in the radial direction of the installation shaft, and the scraper blades are used to scrape the inner wall of the pipeline. At the same time, the outer edges of the outermost scraper blades at both ends of the installation shaft form a closed arc structure, which can scrape the inner wall of the pipeline cleanly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings.

[0019] Figure 1 It is an exploded view of the piston scraper of the utility model.

[0020] Figure 2 It is a schematic diagram of the structure of the piston scraper of the utility model.

[0021] Figure 3 It is a schematic diagram of the structure of a large scraper blade of the utility model.

[0022] Figure 4 It is a structural schematic diagram of a small scraper blade of the utility model.

[0023] In the figure: 1. large scraper blade; 11. large scraper blade; 12. large scraper blade mounting column; 13. large scraper blade mounting hole; 14. large arc-shaped surface; 15. inner surface of large scraper blade; 16. large scraper blade mounting column mounting area; 2. small scraper blade; 21. small scraper blade; 22. small scraper blade mounting column; 23. small scraper blade mounting hole; 24. small arc-shaped surface; 25. inner surface of small scraper blade; 26. small scraper blade mounting column mounting area; 3. mounting shaft; 4. fixing column. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Please refer to Figure 1-Figure 2 As shown, a piston scraper is used to scrape the inner wall of a pipe, comprising a mounting shaft 3 and a plurality of scraper blades. The scraper blades are radially mounted on the mounting shaft 3, and the outer edges of the scraper blades fit against the inner wall of the pipe. The outer edges of the outermost scraper blades at both ends of the mounting shaft 3 form a closed arc structure.

[0026] When in use, a piston scraper is installed in a cylindrical pipe to scrape the inner wall of the pipe. One of the usage scenarios is to use it in the pipe of a heat exchanger during the production process of a two-phase refrigerant.

[0027] Example 1

[0028] Please refer to Figure 3 As described, the scraper blade comprises a large scraper blade 1 , and the large scraper blade 1 is radially mounted at both ends of the mounting shaft 3 .

[0029] The large scraper blade 1 includes a large scraper blade 11, the outer edge of the large scraper blade 11 fits against the inner wall of the pipe, the outer edge of the large scraper blade 11 is arc-shaped, and the arc angle is π. When in use, two large scraper blades 1 are installed on the two ends of the mounting shaft 3, and the outer edges of the two large scraper blades 11 with an arc angle of π form a complete circle, which can scrape off the attachments on the inner wall of the pipe to prevent the attachments from being missed.

[0030] A notch is provided on the large scraper blade 1 , and the notch is used for attachments on the inner wall of the pipeline to pass through, so as to prevent the attachments from hindering the movement of the large scraper blade 1 .

[0031] The large scraper blade 1 also includes a large scraper blade mounting column 12. The large scraper blade 11 is fixed to the large scraper blade mounting column 12. A gap is formed between the large scraper blade 11 and the large scraper blade mounting column 12. The large scraper blade 11 is used to scrape the inner wall of the pipeline. The large scraper blade mounting column 12 is used to be fixed to the mounting shaft 3. Specifically, a large scraper blade mounting hole 13 is provided at the bottom of the large scraper blade mounting column 12. A fixing column 4 is provided on the mounting shaft 3. The fixing column 4 is plugged into the large scraper blade mounting hole 13. The bottom of the large scraper blade mounting column 12 is a large arc surface 14. The curvature of the large arc surface 14 corresponds to the mounting shaft 3.

[0032] The large scraper blade 11 has a large scraper blade mounting post 12 mounted on its large scraper blade inner surface 15, a large scraper blade mounting post mounting area 16 is provided in the middle of the large scraper blade inner surface 15, and the large scraper blade mounting post 12 is mounted on the large scraper blade mounting post mounting area 16. The large scraper blade 11 as a whole has a structure that is thick in the middle and gradually thins toward both sides, and the thickness of the large scraper blade mounting post mounting area 16 is the highest.

[0033] Example 2

[0034] Please refer to Figure 4 The scraper blade further comprises a small scraper blade 2, which is radially distributed between the large scraper blades 1 at both ends. The small scraper blade 2 is provided with a notch.

[0035] The small scraper blade 2 includes a small scraper blade 21, the outer edge of the small scraper blade 21 is in contact with the inner wall of the pipe, the outer edge of the small scraper blade 21 is arc-shaped, and the curvature of the arc is 2π / 3. When in use, the small scraper blade 2 is radially installed on the mounting shaft 3. In order to be able to scrape off the attachments on the inner wall of the pipe and prevent the attachments from being missed, three small scraper blades 2 can be arranged as a group. The three small scraper blades 2 are not radially in the same plane, and the outer edges of the three small scraper blades 21 with an arc of 2π / 3 are projected onto the same plane to form a complete circle.

[0036] The small scraper blade 2 also includes a small scraper installation column 22, the small scraper 21 and the small scraper installation column 22 are fixed, the small scraper 21 is used to scrape the inner wall of the pipeline, and the small scraper installation column 22 is used to be fixed to the installation shaft 3. Specifically, a small scraper installation hole 23 is provided at the bottom of the small scraper installation column 22, and the fixing column 4 is plugged into the small scraper installation hole 23. The bottom of the small scraper installation column 22 is a small arc surface 24, and the curvature of the small arc surface 24 corresponds to the installation shaft 3.

[0037] Specifically, the fixing column 4 is a bolt structure, and the inner walls of the large scraper blade mounting hole 13 and the small scraper blade mounting hole 23 are provided with threaded holes. The bolt structure and the threaded holes correspond to each other to achieve a fixed connection between the fixing column 4 and the large scraper blade mounting hole 13 and the small scraper blade mounting hole 23.

[0038] A small scraper installation column 22 is installed on the small scraper inner surface 25 of the small scraper 21, a small scraper installation column installation area 26 is provided in the middle of the small scraper inner surface 25 of the small scraper 21, and the small scraper installation column 22 is installed on the small scraper installation column installation area 26. The small scraper 21 as a whole has a structure that is thick in the middle and gradually thins toward both sides, and the thickness of the small scraper installation column installation area 26 is the highest.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A piston scraper for scraping the inner wall of a pipe, characterized in that: It comprises a mounting shaft and a plurality of scraper blades. The scraper blades are radially mounted on the mounting shaft. The outer edges of the scraper blades fit the inner wall of the pipe. The outer edges of the outermost scraper blades at both ends of the mounting shaft form a closed arc structure.

2. A piston scraper according to claim 1, characterized in that: The scraper blade comprises a large scraper blade, and the large scraper blade comprises a large scraper blade. The outer edge of the large scraper blade fits the inner wall of the pipeline, and the outer edge of the large scraper blade is arc-shaped, and the radian of the arc is π.

3. A piston scraper according to claim 2, characterized in that: The large scraper blades are radially mounted on both ends of the mounting shaft.

4. A piston scraper according to claim 2, characterized in that: The large scraper blade is provided with a notch.

5. A piston scraper according to claim 4, characterized in that: The large scraper blade also includes a large scraper blade mounting column. The large scraper blade and the large scraper blade mounting column are fixed to each other, and a gap is formed between the large scraper blade and the large scraper blade mounting column.

6. A piston scraper according to claim 5, characterized in that: A large scraper blade mounting hole is arranged at the bottom of the large scraper blade mounting column, and a fixing column is arranged on the mounting shaft, and the fixing column is plugged into the large scraper blade mounting hole.

7. A piston scraper according to claim 2, characterized in that: A large scraper blade mounting column is installed on the inner surface of the large scraper blade, a large scraper blade mounting column mounting area is arranged in the middle of the inner surface of the large scraper blade, and the large scraper blade mounting column is installed on the large scraper blade mounting column mounting area; the large scraper blade as a whole has a structure that is thick in the middle and gradually thins towards both sides, and the thickness of the large scraper blade mounting column mounting area is the highest.

8. A piston scraper according to claim 7, characterized in that: The scraper blade also includes a small scraper blade, which includes a small scraper blade. The outer edge of the small scraper blade fits the inner wall of the pipeline. The outer edge of the small scraper blade is arc-shaped, and the radian of the arc is 2π / 3.

9. A piston scraper according to claim 8, characterized in that: The small scraper blades are radially distributed in the middle of the large scraper blades at both ends, and notches are arranged on the small scraper blades.

10. A piston scraper according to claim 6, characterized in that: The fixing column is a bolt structure, and the inner walls of the large scraper blade mounting hole and the small scraper blade mounting hole are provided with threaded holes, and the bolt structure corresponds to the threaded holes.

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