Dustproof scraper device of air cylinder

Abstract

The utility model discloses an air cylinder dustproof scraper device which comprises a scraper body, the scraper body comprises a scraper outer ring and a scraper inner ring, the scraper inner ring is arranged in the scraper outer ring, the scraper inner ring is detachably connected with the scraper outer ring, a buckle structure is arranged between the scraper inner ring and the scraper outer ring, and the buckle structure is used for limiting the scraper inner ring. According to the scraper device, the scraper outer ring is installed at the upper end of the air cylinder, the scraper inner ring is arranged in the scraper outer ring, when the air cylinder rod retracts, dust on the air cylinder rod is scraped through the scraper inner ring, the air cylinder rod is kept clean, dust is prevented from entering the air cylinder through the air cylinder rod, and therefore the air cylinder is effectively protected; a good sealing effect of the air cylinder is guaranteed, the overall service life of the air cylinder is prolonged, the buckle structure is arranged between the scraper inner ring and the scraper outer ring, the scraper inner ring is limited through the buckle structure, the scraper inner ring and the scraper outer ring are detachably connected, and after long-time use, the scraper inner ring is abraded, and the scraper inner ring is convenient to replace.

Description

A cylinder dustproof scraper device Technical Field

[0001] This utility model relates to the field of cylinder dust prevention technology, and more specifically to a cylinder dust prevention scraper device. Background Technology

[0002] Cylinders can operate reliably under harsh conditions, are simple to operate, and are essentially maintenance-free. They are widely used as drive accessories in automatic control valves in chemical production plants. Cylinders drive automatic control valves such as three-bar valves and disc valves to open or close through the reciprocating linear motion of a piston. Furthermore, the simple adjustment of cylinders allows for easy and stable speed control, which is the greatest characteristic and advantage of cylinder drive systems.

[0003] Currently, there are two types of structures in the existing technology of cylinder-driven self-control valves: one is a fully enclosed structure, in which the piston rod of the cylinder component is completely enclosed in the self-control valve drive assembly and is not affected by the operating environment; the other is a universal structure, in which when the cylinder receives appropriate air source pressure, the piston rod component extends out of the cylinder and is exposed in the operating ring, and is affected by the surrounding environment and dust.

[0004] The three-rod valve of the air separation unit and the disc valve drive accessory cylinder of the gasification unit adopt a universal structure. During field use, a phenomenon occurs where the sealing ring on the cylinder end cover is carried out by the cylinder rod. The reason for this is that, over long-term use, dust, grease, and other substances from the field environment adhere to the cylinder rod. If this dust is not cleaned in time, it will be carried into the cylinder interior by the cylinder rod. Furthermore, the dust adhering to the cylinder rod significantly increases the friction of the cylinder rod, making it easy for the sealing ring on the end cover to be pulled out of the groove when the cylinder rod moves outward. When the cylinder sealing ring is carried out by the cylinder rod, it causes a decrease in the cylinder's sealing performance, and dust can easily enter the cylinder interior, potentially damaging components such as the cylinder piston seal and the cylinder inner wall. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, the purpose of this utility model is to provide a cylinder dustproof scraper device. This scraper device includes an outer scraper ring and an inner scraper ring. The outer scraper ring is mounted on the cylinder, and the inner scraper ring is located inside the outer scraper ring. When the cylinder rod retracts, the inner scraper ring scrapes away dust and other contaminants from the cylinder rod, keeping it clean and preventing dust from entering the cylinder through the cylinder rod. This effectively protects the cylinder, extends the cylinder seal, and improves the overall service life of the cylinder. Furthermore, a snap-fit ​​structure is provided between the inner and outer scraper rings to limit the inner scraper ring's movement, allowing for a detachable connection between the inner and outer scraper rings. This facilitates replacement of the inner scraper ring after prolonged use when it wears down.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A cylinder dustproof scraper device includes a scraper body; characterized in that: the scraper body includes a scraper outer ring and a scraper inner ring, the scraper inner ring is disposed inside the scraper outer ring, the scraper inner ring and the scraper outer ring are detachably connected, and a snap-fit ​​structure is provided between the scraper inner ring and the scraper outer ring for limiting the scraper inner ring. This scraper device includes a scraper outer ring and a scraper inner ring, which are mounted on a cylinder via the scraper outer ring. The scraper inner ring is disposed inside the scraper outer ring. When the cylinder rod retracts, the scraper inner ring scrapes away dust from the cylinder rod, keeping the cylinder rod clean and preventing dust from entering the cylinder through the cylinder rod, thereby effectively protecting the cylinder, extending the cylinder seal and the overall service life of the cylinder. Furthermore, the snap-fit ​​structure between the scraper inner rings limits the scraper inner ring, allowing for a detachable connection between the scraper inner ring and the scraper outer ring. After prolonged use, when the scraper inner ring wears out, it is easy to replace the scraper inner ring.

[0008] Furthermore, the inner ring of the scraper is provided with a convex ring, and the outer ring of the scraper is provided with a limiting platform. The convex ring abuts against the limiting platform, and the buckle structure is connected to the convex ring.

[0009] Furthermore, the buckle structure includes a limiting post and an elastic element. The limiting post is provided with a connecting plate, and the elastic element is fixed on the connecting plate. The other end of the elastic element is connected to the outer ring of the scraper. The outer ring of the scraper is provided with a limiting hole. The limiting post passes through the limiting hole and abuts against the convex ring to achieve limiting.

[0010] Furthermore, the limiting post is provided with a limiting protrusion, and the convex ring is provided with a limiting groove, with the limiting protrusion engaging in the limiting groove.

[0011] Furthermore, it also includes a clamping ring, which has a compression groove, and the limiting post has an arc-shaped sliding protrusion, the compression groove being used to compress the sliding protrusion.

[0012] Furthermore, the outer ring of the scraper is provided with a sliding space, and the snap-fit ​​structure is installed in the sliding space.

[0013] Furthermore, the inner ring of the scraper is provided with a scraping section, and the outer surface of the scraping section is inclined.

[0014] Furthermore, the inner ring of the scraper is provided with a positioning part, which is installed inside the cylinder. The positioning part is provided with a sealing groove, which is used to install a sealing ring.

[0015] Furthermore, the outer ring of the scraper is provided with a fixing hole, and a fixing bolt is installed in the fixing hole. The outer ring of the scraper is installed on the upper part of the cylinder through the fixing hole and the fixing bolt.

[0016] Furthermore, the inner ring of the scraper is embedded with conductive copper wire.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In this utility model, the scraper body includes an outer scraper ring and an inner scraper ring. The inner scraper ring is located inside the outer scraper ring and is detachably connected to the outer scraper ring. A snap-fit ​​structure is provided between the inner and outer scraper rings to limit the movement of the inner scraper ring. This scraper device includes an outer scraper ring and an inner scraper ring. The outer scraper ring is mounted on a cylinder, and the inner scraper ring is located inside the outer scraper ring. When the cylinder rod retracts, the inner scraper ring scrapes away dust and other debris from the cylinder rod, keeping it clean and preventing dust and other debris from entering the cylinder through the cylinder rod. This effectively protects the cylinder, ensures cylinder sealing, and extends the overall service life of the cylinder. Furthermore, the snap-fit ​​structure between the inner and outer scraper rings limits the movement of the inner scraper ring, allowing for a detachable connection between them. After prolonged use, when the inner scraper ring wears out, it is easy to replace. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings:

[0020] Figure 1 is a schematic diagram of the scraper device and cylinder of this utility model after installation;

[0021] Figure 2 is a structural schematic diagram of the scraper device in this utility model from another perspective;

[0022] Figure 3 is a schematic diagram of the inner ring of the scraper in this utility model;

[0023] Figure 4 is a schematic diagram of the outer ring of the scraper in this utility model;

[0024] Figure 5 is a schematic diagram of the clamping ring in this utility model;

[0025] Figure 6 is a structural schematic diagram of the buckle structure in this utility model;

[0026] Figure 7 is a structural schematic diagram of Embodiment 2 of this utility model.

[0027] In the diagram: 1-Scraper body; 2-Scraper outer ring; 3-Scraper inner ring; 4-Snap-fit ​​structure; 5-Protruding ring; 6-Limiting platform; 7-Limiting post; 8-Elastic element; 9-Connecting plate; 10-Limiting protrusion; 11-Limiting groove; 12-Clamping ring; 13-Extrusion groove; 14-Sliding protrusion; 15-Sliding space; 16-Scraping part; 17-Positioning part; 18-Sealing groove; 19-Fixing hole; 20-Fixing bolt; 21-Limiting hole; 22-Conductive copper wire. Detailed Implementation

[0028] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0029] Example 1

[0030] As shown in Figures 1 to 6, this utility model discloses a cylinder dustproof scraper device, including a scraper body 1 and a snap-fit ​​structure 4. The scraper body 1 includes an outer scraper ring 2 and an inner scraper ring 3. The inner scraper ring 3 is disposed inside the outer scraper ring 2 and is detachably connected to the outer scraper ring 2. The snap-fit ​​structure 4 is disposed between the inner scraper ring 3 and the outer scraper ring 2. The inner scraper ring 3 has a protruding ring 5, and the outer scraper ring 2 has a limiting platform 6. When the inner scraper ring 3 is installed inside the outer scraper ring 2, the protruding ring 5 abuts against the limiting platform 6 to ensure that the inner scraper ring 3 is installed in place and that the snap-fit ​​structure 4 can engage with the protruding ring 5. The snap-fit ​​structure 4 limits the movement of the inner scraper ring 3. This allows for the installation of the inner ring 3 and outer ring 2 of the scraper. The outer ring 2 is mounted on the cylinder, while the inner ring 3 is positioned inside the outer ring 2. When the cylinder rod retracts, the inner ring 3 scrapes away dust and other debris from the cylinder rod, keeping it clean and preventing dust from entering the cylinder. This effectively protects the cylinder, extends the cylinder seal, and improves the overall service life of the cylinder. Furthermore, a snap-fit ​​structure 4 is provided between the inner ring 3 and the outer ring 2 to limit the movement of the inner ring 3, allowing for a detachable connection between them. This facilitates replacement of the inner ring 3 when it wears down after prolonged use.

[0031] The outer ring 2 of the scraper is provided with a sliding space 15, and the snap-fit ​​structure 4 is installed in the sliding space 15. The snap-fit ​​structure 4 is limited by the sliding space 15 to ensure the position of the snap-fit ​​structure 4 and prevent the snap-fit ​​structure 4 from being misaligned. This further ensures the limiting effect of the snap-fit ​​structure 4 on the inner ring 3 of the scraper.

[0032] The snap-fit ​​structure 4 includes a limiting post 7, an elastic element 8, and a locking ring 12. The limiting post 7 has a connecting plate 9, which is located in the sliding space 15 and slides up and down along the sliding space 15. One end of the elastic element 8 is fixed to the connecting plate 9, and the other end of the elastic element 8 is connected to the outer ring 2 of the scraper. Specifically, the other end of the elastic element 8 is fixedly connected to the upper top arm of the sliding space 15. In this embodiment, the elastic element 8 can be a spring or other elastic component. The outer ring 2 of the scraper has a limiting hole 21, and the limiting post 7 has an arc-shaped sliding protrusion 14 that passes through the limiting hole 21. The locking ring 12 is installed on the outer ring 2 of the scraper and can slide along the outer ring 2 of the scraper to lock. Ring 12 is provided with a pressing groove 13. During the movement of the clamping ring 12, the pressing groove 13 presses the sliding protrusion 14. The sliding protrusion 14 drives the limiting post 7 to move. The limiting post 7 is provided with a limiting protrusion 10. The convex ring 5 is provided with a limiting groove 11. After the limiting post 7 is pressed, the limiting protrusion 10 is inserted into the limiting groove 11, thereby realizing the limiting function of the inner ring 3 of the scraper. When it is necessary to replace or disassemble the inner ring 3 of the scraper, first move the clamping ring 12 to separate the arc-shaped sliding protrusion 14 from the pressing groove 13. Under the elastic action of the elastic element 8, the elastic element 8 will pull the limiting post 7 to move, thereby causing the limiting protrusion 10 to disengage from the limiting groove 11 and disassemble the inner ring 3 of the scraper from the outer ring 2 of the scraper.

[0033] The inner ring 3 of the scraper is provided with a scraping part 16 and a positioning part 17. The outer surface of the scraping part 16 is inclined. The inclined scraping part 16 can effectively scrape off dust and impurities on the cylinder rod. The positioning part 17 is installed in the cylinder. The positioning part 17 can ensure the accurate installation of the scraper body 1 and the cylinder, and also prevent the cylinder rod from taking out the sealing ring in the cylinder. The positioning part 17 is provided with a sealing groove 18, which is used to install the sealing ring and increase the sealing effect.

[0034] The outer ring 2 of the scraper is provided with a fixing hole 19, and a fixing bolt 20 is installed in the fixing hole 19. The outer ring 2 of the scraper is installed on the cylinder through the fixing hole 19 and the fixing bolt 20.

[0035] In this embodiment, the outer ring 2 of the scraper can be made of reinforced PTFE material to increase the overall strength of the scraper body 1, and the inner ring 3 of the scraper can be made of self-lubricating PTFE material to improve the lubricity of the inner ring 3 of the scraper and ensure a low coefficient of friction.

[0036] Example 2

[0037] As shown in Figure 7, based on the structure of Embodiment 1, Embodiment 2 embeds a conductive copper wire 22 in the inner ring 3 of the scraper. The conductive copper wire 22 eliminates the static electricity of the cylinder rod and reduces the phenomenon of dust adsorption on the cylinder rod.

[0038] The embodiments of this utility model are not limited thereto. Based on the above embodiments of this utility model, using conventional technical knowledge and common methods in the field, without departing from the basic technical idea of ​​this utility model and without conflict, the above preferred embodiments can be modified, replaced or combined in various other forms. All other embodiments obtained fall within the scope of protection of this utility model.

Claims

1. A cylinder dustproof scraper device, comprising a scraper body; characterized in that: The scraper body includes an outer scraper ring and an inner scraper ring. The inner scraper ring is disposed inside the outer scraper ring. The inner scraper ring and the outer scraper ring are detachably connected. A snap-fit ​​structure is provided between the inner scraper ring and the outer scraper ring. The snap-fit ​​structure is used to limit the inner scraper ring.

2. The cylinder dustproof scraper device according to claim 1, characterized in that: The inner ring of the scraper is provided with a convex ring, and the outer ring of the scraper is provided with a limiting platform. The convex ring abuts against the limiting platform, and the buckle structure is connected to the convex ring.

3. The cylinder dustproof scraper device according to claim 2, characterized in that: The buckle structure includes a limiting post and an elastic element. The limiting post is provided with a connecting plate, and the elastic element is fixed on the connecting plate. The other end of the elastic element is connected to the outer ring of the scraper. The outer ring of the scraper is provided with a limiting hole, and the limiting post passes through the limiting hole. The limiting post abuts against the convex ring to achieve limiting.

4. The cylinder dustproof scraper device according to claim 3, characterized in that: The limiting post is provided with a limiting protrusion, and the convex ring is provided with a limiting groove, and the limiting protrusion is engaged in the limiting groove.

5. A cylinder dustproof scraper device according to claim 3, characterized in that: It also includes a clamping ring, which has a compression groove, and the limiting post has an arc-shaped sliding protrusion, the compression groove being used to compress the sliding protrusion.

6. The cylinder dustproof scraper device according to claim 1, characterized in that: The outer ring of the scraper has a sliding space, and the buckle structure is installed in the sliding space.

7. The cylinder dustproof scraper device according to claim 1, characterized in that: The inner ring of the scraper is provided with a scraping part, and the outer surface of the scraping part is inclined.

8. The cylinder dustproof scraper device according to claim 1, characterized in that: The inner ring of the scraper is provided with a positioning part, which is installed in the cylinder. The positioning part is provided with a sealing groove for installing a sealing ring.

9. A cylinder dustproof scraper device according to claim 1, characterized in that: The outer ring of the scraper is provided with a fixing hole, and a fixing bolt is installed in the fixing hole. The outer ring of the scraper is installed on the upper part of the cylinder through the fixing hole and the fixing bolt.

10. A cylinder dustproof scraper device according to claim 1, characterized in that: The inner ring of the scraper is embedded with a conductive copper wire.

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