Cylinder sleeve of spraying machine

Abstract

The utility model provides a cylinder sleeve of a spraying machine, and belongs to the technical field of spraying machines. The spraying machine cylinder sleeve comprises a cylinder body, a cylinder sleeve body and a plunger, the cylinder sleeve body is plugged in the cylinder body, the plunger slides in the cylinder sleeve body, a sealing ring A and an oil distribution ring are sequentially arranged on the opening portion of the cylinder sleeve body inwards, an oil storage cavity is formed between the cylinder sleeve body and the cylinder body and communicated with the position of the sealing ring A, and the plunger slides in the cylinder sleeve body. A connector is arranged on the cylinder body and communicated with the oil storage cavity, and the outer circle of the plunger is connected with the sealing ring A and the oil distribution ring in a sliding mode. In the application, the cylinder sleeve is used for replacing the friction between the cylinder body and the plunger, only the cylinder sleeve needs to be regularly maintained or replaced, the gap between the cylinder sleeve and the cylinder body is used for forming the oil storage cavity, and the joint is externally connected with oil pumping equipment to pump lubricating oil in the oil storage cavity to the oil distribution ring to lubricate the plunger rod, so that the reliability of the sealing ring A is improved.

Description

Technical Field

[0001] The present application relates to the technical field of spraying machines, and in particular to a cylinder sleeve of a spraying machine. Background Art

[0002] The plunger pump is a key component in the paint sprayer. Its function is to extract the paint from the tank and pressurize it to the spray gun. Inside the plunger pump, there are usually structures such as a plunger, a plunger cavity, and a sealing ring. The paint will enter the pump cavity and be pressurized and transported under the movement of the plunger.

[0003] In this regard, China's patent application number CN201120007791.2 discloses a sealing device for a plunger pump cylinder sleeve. This solution mainly installs an elastic steel ring at the front end of the plunger body of the plunger pump. Even when the plunger body moves back and forth in the cylinder sleeve, the elastic steel ring will form a seal with the inner wall of the cylinder sleeve to maintain the pressure inside the cylinder sleeve and enable the plunger pump to work better.

[0004] However, in the process of implementing the technical solution in the embodiments of the present application, the inventor of the present application found that the above technology has at least the following technical problems:

[0005] 1. The elastic steel ring has a high hardness, which can easily cause wear on the inner wall of the cylinder, affecting reliability;

[0006] 2. The continuous movement of the plunger will cause the ink on the plunger surface to become thinner or break, which will cause wear of the conical sealing ring. Utility Model Content

[0007] In order to make up for the above deficiencies, the present application provides a spray machine cylinder sleeve, aiming to improve the problems mentioned in the above background technology.

[0008] The embodiment of the present application provides a cylinder sleeve of a spray machine, including a cylinder body, a cylinder sleeve and a plunger, wherein the cylinder sleeve plug is in the cylinder body, the plunger slides in the cylinder sleeve, a sealing ring A and an oil distribution ring are sequentially arranged inwardly at the mouth of the cylinder sleeve, an oil storage chamber is arranged between the cylinder sleeve and the cylinder body and is connected to the position of the sealing ring A, a joint is arranged on the cylinder body and is connected to the oil storage chamber, and the outer circle of the plunger is slidably connected to the sealing ring A and the oil distribution ring.

[0009] In a specific embodiment, the mouth of the cylinder liner is turned outward and overlaps the cylinder liner.

[0010] In the above implementation process, the flange plays a positioning role, and a through hole is provided at the flange position so that the lubricating oil in the oil storage cavity can enter the position of the sealing ring A through the through hole.

[0011] In a specific implementation manner, a pressing ring is threadedly connected to the cylinder sleeve, and the pressing ring is movably pressed against the cylinder sleeve.

[0012] In the above implementation process, after the cylinder sleeve is inserted into the cylinder body, it is screwed onto the cylinder body using a pressure ring, and the cylinder sleeve is restricted and fixed in the cylinder body.

[0013] In a specific implementation manner, the inner side of the sealing ring A is movably fitted to the outer circle of the plunger, and the two sides of the sealing ring A are respectively pressed against the pressure ring and the cylinder sleeve.

[0014] In the above implementation process, the sealing ring A acts as a seal between the plunger and the cylinder sleeve.

[0015] In a specific implementation manner, the lower end of the cylinder sleeve is pressed against the inner end of the cylinder body, and a sealing ring B is provided at the inner end of the cylinder sleeve.

[0016] In the above implementation process, the sealing ring B plays a role in sealing between the cylinder liner and the cylinder body.

[0017] In a specific embodiment, the inner end array of the plunger is provided with sealing rings, and the openings of the sealing rings are staggered with each other.

[0018] In the above implementation process, the sealing ring is used to improve the sealing between the plunger and the cylinder sleeve, and multiple sealing rings help to improve the sealing effect.

[0019] In a specific embodiment, the opening of the sealing ring is arranged as an overlapping cut.

[0020] In the above implementation process, the setting of the overlapping cuts helps to improve the sealing performance compared with the conventional straight cuts and oblique cuts.

[0021] In a specific embodiment, the outer circle of the sealing ring is configured as a conical surface.

[0022] In the above implementation process, the cone angle is between 30' and 1 degree 35', which is characterized by higher radial pressure and shortened initial running-in time, and can avoid the upper side of the sealing ring from contacting the cylinder wall. Therefore, it has better oil distribution ability when going up and can scrape oil when going down. Therefore, it can also scrape the paint from the inner wall of the cylinder liner when going down, thereby improving the sealing of the paint.

[0023] Compared with the prior art, the beneficial effects of the present application are: the cylinder liner is used to replace the friction between the cylinder body and the plunger, and only the cylinder liner needs to be maintained or replaced regularly. The gap between the cylinder liner and the cylinder body is used to form an oil storage chamber, and the lubricating oil in the oil storage chamber is pumped to the oil ring by an external oil pumping device using a joint to lubricate the plunger rod, thereby improving the reliability of the sealing ring A. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of an external perspective of a cylinder sleeve of a spraying machine provided in an embodiment of the present application;

[0026] Figure 2 A schematic diagram of the internal perspective of a cylinder liner of a spraying machine provided in an embodiment of the present application;

[0027] Figure 3 A schematic diagram of the cylinder sleeve structure provided for an embodiment of the present application;

[0028] Figure 4 Provided for the implementation of this application Figure 2 A partial enlarged schematic diagram in the middle.

[0029] In the figure: 10-cylinder body; 20-cylinder liner; 30-plunger; 40-sealing ring A; 50-oil distribution ring; 60-pressure ring; 70-sealing ring B; 80-sealing ring; 90-connector. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0031] See also Figure 1-Figure 4 The present application provides a cylinder sleeve of a spraying machine, including a cylinder body 10, a cylinder sleeve 20 and a plunger 30. The cylinder sleeve 20 is inserted in the cylinder body 10, and the plunger 30 slides in the cylinder sleeve 20. The mouth of the cylinder sleeve 20 is sequentially provided with a sealing ring A40 and an oil distribution ring 50. An oil storage chamber is provided between the cylinder sleeve 20 and the cylinder body 10 and is connected to the position of the sealing ring A40. A joint 90 is provided on the cylinder body 10 and is connected to the oil storage chamber. The outer circle of the plunger 30 is slidably connected with the sealing ring A40 and the oil distribution ring 50. Among them, the cylinder sleeve 20 is used to replace the cylinder body 10 to rub against the plunger 30, and it only needs to regularly maintain or replace the cylinder sleeve 20. The gap between the cylinder sleeve 20 and the cylinder body 10 forms an oil storage chamber, and the joint 90 is used to connect an external oil pumping device to pump the lubricating oil in the oil storage chamber to the oil distribution ring 50 to lubricate the plunger 30 rod, thereby improving the reliability of the sealing ring A40.

[0032] See also Figure 1-Figure 4 The mouth of the cylinder sleeve 20 is turned outward and placed on the cylinder sleeve 20. The turning edge plays a positioning role, and a through hole is provided at the turning edge position so that the lubricating oil in the oil storage cavity can enter the position of the sealing ring A40 through the through hole.

[0033] See also Figure 1-Figure 4 A pressing ring 60 is screwed on the cylinder sleeve 20, and the pressing ring 60 is movably pressed against the cylinder sleeve 20. After the cylinder sleeve 20 is inserted into the cylinder body 10, the pressing ring 60 is screwed on the cylinder body 10, and the cylinder sleeve 20 is restricted and fixed in the cylinder body 10.

[0034] See also Figure 1-Figure 4 The inner side of the sealing ring A40 is movably fitted to the outer circle of the plunger 30, and the two sides of the sealing ring A40 are respectively pressed against the pressing ring 60 and the cylinder sleeve 20. The sealing ring A40 plays a role in sealing between the plunger 30 and the cylinder sleeve 20.

[0035] See also Figure 1-Figure 4 The lower end of the cylinder sleeve 20 is tightly pressed against the inner end of the cylinder body 10, and a sealing ring B70 is provided at the inner end of the cylinder sleeve 20. The sealing ring B70 plays a role in sealing between the cylinder sleeve 20 and the cylinder body 10.

[0036] See also Figure 1-Figure 4 The inner end of the plunger 30 is provided with a sealing ring 80, and the openings of the sealing ring 80 are staggered. The sealing ring 80 is used to improve the sealing between the plunger 30 and the cylinder sleeve 20, and multiple sealing rings 80 help to improve the sealing effect.

[0037] See also Figure 1-Figure 4 The opening of the sealing ring 80 is provided with an overlapping cut, which helps to improve the sealing performance compared with conventional straight cuts and oblique cuts.

[0038] See also Figure 1-Figure 4 The outer circle of the sealing ring 80 is set as a conical surface. The angle of the conical surface is between 30' and 1 degree 35', which has the characteristics of high radial pressure and shortened initial running-in time, and can avoid the upper side of the sealing ring 80 from contacting the cylinder wall, so it has a better oil distribution ability when going up, and can scrape oil when going down, so it can also scrape paint from the inner wall of the cylinder liner 20 when going down, thereby improving the sealing performance of the paint.

[0039] The working principle of the cylinder sleeve of the spraying machine is as follows: insert the cylinder sleeve 20 into the cylinder body 10, then screw the pressure ring 60 onto the cylinder body 10, and restrict and fix the cylinder sleeve 20 in the cylinder body 10. The cylinder sleeve 20 replaces the cylinder body 10 to rub against the piston column. When the cylinder sleeve 20 is worn, only the cylinder sleeve 20 needs to be replaced. When the plunger 30 moves up and down in the cylinder sleeve 20, the external oil pumping equipment pressurizes the oil storage chamber through the joint 90. The lubricating oil in the oil storage chamber passes through the through hole and enters the position of the oil distribution ring 50. The lubricating oil is evenly applied to the piston column by using the oil distribution ring 50, thereby effectively improving the reliability of the sealing ring A40. On the other hand, The inner end array of the plunger 30 is provided with a sealing ring 80, which adopts a conical cross-sectional shape. It has a good oil distribution ability when it is in an upward shape, and can scrape the oil when it is in a downward shape. Therefore, the paint can also be scraped off the inner wall of the cylinder liner 20 when it is in a downward shape, thereby improving the sealing of the paint. In summary, the cylinder liner 20 is used to replace the cylinder body 10 for friction with the plunger 30, and it only needs to maintain or replace the cylinder liner 20 regularly. The gap between the cylinder liner 20 and the cylinder body 10 is used to form an oil storage chamber, and the external oil pumping equipment is used by the joint 90 to pump the lubricating oil in the oil storage chamber to the oil distribution ring 50 to lubricate the plunger 30 rod, thereby improving the reliability of the sealing ring A40.

[0040] The above are only embodiments of the present application and are not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, improvement or equivalent replacement made within the spirit and principle of the present application shall be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

Claims

1. A spraying machine cylinder sleeve, characterized in that: The invention comprises a cylinder body (10), a cylinder sleeve (20) and a plunger (30), wherein the cylinder sleeve (20) is plugged in the cylinder body (10), the plunger (30) slides in the cylinder sleeve (20), a sealing ring A (40) and an oil distribution ring (50) are sequentially arranged inwardly at the mouth of the cylinder sleeve (20), an oil storage chamber is arranged between the cylinder sleeve (20) and the cylinder body (10) and is connected to the position of the sealing ring A (40), a joint (90) is arranged on the cylinder body (10) and is connected to the oil storage chamber, and the outer circle of the plunger (30) is slidably connected to the sealing ring A (40) and the oil distribution ring (50).

2. A spraying machine cylinder sleeve according to claim 1, characterized in that: The mouth of the cylinder sleeve (20) is turned outwards and overlaps the cylinder sleeve (20).

3. A spraying machine cylinder sleeve according to claim 2, characterized in that: A pressing ring (60) is threadedly connected to the cylinder sleeve (20), and the pressing ring (60) is movably pressed against the cylinder sleeve (20).

4. A spraying machine cylinder sleeve according to claim 3, characterized in that: The inner side of the sealing ring A (40) is movably fitted to the outer circle of the plunger (30), and the two sides of the sealing ring A (40) are respectively pressed against the pressure ring (60) and the cylinder sleeve (20).

5. A spraying machine cylinder sleeve according to claim 4, characterized in that: The lower end of the cylinder sleeve (20) is tightly pressed against the inner end of the cylinder body (10), and a sealing ring B (70) is provided at the inner end of the cylinder sleeve (20).

6. A spraying machine cylinder sleeve according to claim 5, characterized in that: The inner end of the plunger (30) is provided with a sealing ring (80) in an array, and the openings of the sealing ring (80) are staggered with each other.

7. A spraying machine cylinder sleeve according to claim 6, characterized in that: The opening of the sealing ring (80) is arranged as an overlapping cutout.

8. The cylinder sleeve of a spraying machine according to claim 7, characterized in that: The outer circle of the sealing ring (80) is arranged as a conical surface.

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