Sealing ring of pneumatic piston rod

Abstract

The utility model discloses a pneumatic piston rod sealing ring, and particularly relates to the technical field of sealing rings, the pneumatic piston rod sealing ring comprises a sealing ring main body for sealing a pneumatic piston rod, and two sides of the sealing ring main body are respectively provided with a blocking assembly for removing dust and water vapor; each blocking assembly comprises a plurality of supporting rings distributed at intervals. By means of the elastic ring with the funnel-shaped section, the end, opened by the piston rod, of the elastic ring can be firmly attached to the outer portion of the piston rod, so that impurities attached to the piston rod can be blocked and removed, and the situation that the impurities make contact with the sealing ring body along with movement of the piston rod is avoided; according to the sealing ring, impurities can be blocked in a multiple mode, meanwhile, moisture can be absorbed in a multiple mode through the moisture absorption cotton in the blocking cavities, so that the service life of the sealing ring body is guaranteed, and the phenomenon that the use effect of the sealing ring body is affected due to adhesion of the impurities or the moisture is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing rings, in particular to a sealing ring for a pneumatic piston rod. Background Art

[0002] The piston rod is a connecting component that supports the piston to do work. It is mostly used in oil cylinders and cylinder motion actuators. It is a moving component that moves frequently and has high technical requirements. The function of the piston rod is to connect the piston and the crosshead, transmit the force acting on the piston and drive the piston to move. Take the hydraulic cylinder as an example, it is composed of a cylinder barrel, a piston rod (oil cylinder rod), a piston, and an end cover.

[0003] The piston rod sealing ring is a component used to seal the piston rod. In the application of air cylinder or oil cylinder, the piston rod usually needs to perform frequent reciprocating impact motion, so the quality of the sealing ring needs to be strictly regulated.

[0004] As shown in the application document with the prior art publication number CN211117598U, it includes an outer ring, an inner ring 1 and a shrinkage layer, the upper end of the outer ring is provided with the inner ring 1, the outer ring is made of cooked rubber, the lower end of the outer ring is provided with the inner ring 2, the inner side walls of the inner ring 1 and the inner ring 2 are both provided with the shrinkage layer, the inner ring 1 is formed on the outer ring, the inner ring 2 is formed on the outer ring, and the shrinkage layer is formed on the inner ring 1 and the inner ring 2. The beneficial effect is that the technical solution can make the piston rod more tightly sealed against the piston cylinder when moving by providing a shrinkage layer, thereby improving the working efficiency of the piston rod.

[0005] However, the above technical solution cannot effectively block impurities or water vapor, which may cause the impurities or water vapor to adhere to the outside of the sealing ring and cause corrosion damage, thereby affecting the sealing performance of the sealing ring. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the utility model provides a pneumatic piston rod sealing ring, which is an elastic ring with a funnel-shaped cross-section, so that the end of the elastic ring that is stretched open by the piston rod will be firmly attached to the outside of the piston rod, thereby blocking and removing impurities adhering to the piston rod, and preventing the impurities from contacting the sealing ring body with the movement of the piston rod. In addition, with the help of the elastic rings on multiple support rings, the utility model can perform multiple blocking of impurities. At the same time, with the help of the moisture-absorbing cotton in the multiple blocking cavities, water vapor can be absorbed multiple times, thereby ensuring the service life of the sealing ring body, and preventing the adhesion of impurities or water vapor from affecting the use effect of the sealing ring body, so as to solve the problems arising from the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pneumatic piston rod sealing ring, comprising a sealing ring body for sealing the pneumatic piston rod, wherein both sides of the sealing ring body are provided with barrier components for removing dust and water vapor;

[0008] Each group of barrier components includes a plurality of support rings distributed at intervals, an elastic ring is installed on the side of the support ring away from the sealing ring body, a connecting ring is provided between two adjacent elastic rings, two ends of the connecting ring are respectively fixed together with the sides close to the two adjacent elastic rings, a hygroscopic cotton is provided inside the connecting ring, and the hygroscopic cotton is arranged between the two adjacent elastic rings. The elastic ring with a funnel-shaped cross-section makes the end of the elastic ring stretched by the piston rod firmly attached to the outside of the piston rod, thereby blocking and removing impurities adhering to the piston rod, preventing the impurities from contacting the sealing ring body with the movement of the piston rod, and with the help of the elastic rings on the plurality of support rings, the utility model can perform multiple barriers on impurities.

[0009] In a preferred embodiment, the inner diameter of the inner ring is smaller than the inner diameter of the outer ring. By setting the inner diameter of the inner ring smaller than the inner diameter of the outer ring, the inner diameter of the inner ring can be compressed by the piston rod and fit tightly, thereby ensuring the sealing of the inner ring to the piston rod.

[0010] In a preferred embodiment, each group of barrier components includes a plurality of support rings distributed at intervals, an elastic ring is installed on the side of the support ring away from the sealing ring body, a connecting ring is provided between two adjacent elastic rings, both ends of the connecting ring are respectively fixed together with the sides close to the two adjacent elastic rings, and moisture-absorbing cotton is provided inside the connecting ring, and the moisture-absorbing cotton is arranged between the two adjacent elastic rings.

[0011] In a preferred embodiment, the cross section of the elastic ring is set to be funnel-shaped. By setting the cross section of the elastic ring to be funnel-shaped, the end of the elastic ring with a smaller opening will be firmly attached to the outside of the piston rod, thereby blocking and cleaning impurities adhering to the piston rod.

[0012] In a preferred embodiment, the diameter of one end of the elastic ring away from the sealing ring body is smaller than the diameter of the support ring. By setting the inner diameter of the end of the elastic ring away from the sealing ring body to be smaller than the inner diameter of the support ring, the end of the spring ring away from the support ring will be stretched open by the piston rod and thereby firmly attached to the outside of the piston rod.

[0013] In a preferred embodiment, a blocking cavity for blocking impurities is provided between two adjacent support rings, and the moisture-absorbing cotton is arranged inside the blocking cavity. By providing a plurality of blocking cavities, the impurities can be blocked layer by layer.

[0014] Technical effects and advantages of the utility model:

[0015] By setting the elastic ring with a funnel-shaped cross-section, the end of the elastic ring that is stretched open by the piston rod will be firmly attached to the outside of the piston rod, thereby blocking and removing impurities adhering to the piston rod, preventing the impurities from contacting the sealing ring body with the movement of the piston rod, and with the help of the elastic rings on the multiple support rings, the utility model can perform multiple blocking of impurities, and at the same time, with the help of the moisture-absorbing cotton in the multiple blocking cavities, water vapor can be absorbed multiple times, thereby ensuring the service life of the sealing ring body and preventing the adhesion of impurities or water vapor from affecting the use effect of the sealing ring body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a cross-sectional view of the sealing ring body of the utility model;

[0018] Figure 3 This is a cross-sectional view of the support ring of the utility model;

[0019] Figure 4 For the utility model Figure 3 Enlarged view of part A;

[0020] Figure 5 It is a side view of the support ring of the utility model.

[0021] The reference numerals are: 1, sealing ring body; 11, outer ring; 12, inner ring; 13, ring groove;

[0022] 2. Support ring; 3. Elastic ring; 4. Connecting ring; 5. Moisture-absorbing cotton; 6. Blocking chamber. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in 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 in 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.

[0024] Refer to the instruction manual Figure 1-5The utility model provides a pneumatic piston rod sealing ring, including a sealing ring body 1 for sealing a pneumatic piston rod, the sealing ring body 1 including an outer ring 11 and an inner ring 12, the outer ring 11 is sleeved on the outside of the inner ring 12, a ring groove 13 is opened on the side of the outer ring 11 close to the inner ring 12, and the inner ring 12 is embedded in the ring groove 13; two adjacent support rings 2 in two groups of barrier components are respectively installed on both sides of the outer ring 11, and the outer side of the piston rod can be sealed by the setting of the inner ring 12. At the same time, with the help of the nested connection between the inner ring 12 and the outer ring 11, the staff can disassemble and replace the inner ring 12 separately, thereby reducing the cost and eliminating the need for overall replacement.

[0025] like Figure 2 As shown, the inner diameter of the inner ring 12 is smaller than the inner diameter of the outer ring 11. By setting the inner diameter of the inner ring 12 to be smaller than the inner diameter of the outer ring 11, the inner diameter of the inner ring 12 can be compressed by the piston rod and fit tightly, thereby ensuring the sealing performance of the inner ring 12 to the piston rod.

[0026] In order to prevent impurities or water vapor from affecting the use effect of the sealing ring body 1, barrier components for removing dust and water vapor are provided on both sides of the sealing ring body 1;

[0027] like Figure 1-5 As shown, each group of barrier components includes a plurality of support rings 2 distributed at intervals, an elastic ring 3 is installed on the side of the support ring 2 away from the sealing ring body 1, a connecting ring 4 is provided between two adjacent elastic rings 3, both ends of the connecting ring 4 are respectively fixed together with the sides close to the two adjacent elastic rings 3, and a hygroscopic cotton 5 is provided inside the connecting ring 4, and the hygroscopic cotton 5 is arranged between the two adjacent elastic rings 3.

[0028] It is worth mentioning that the elastic ring 3 is stretched open by the piston rod and firmly attached to the outside of the piston rod, thereby preventing impurities from contacting the sealing ring body 1 with the movement of the piston rod, and the distribution of multiple elastic rings 3 allows the utility model to perform multiple barriers to impurities. At the same time, with the help of the moisture-absorbing cotton 5 in the multiple blocking chambers 6, water vapor can be absorbed multiple times to achieve multiple protections for the sealing ring body 1.

[0029] like Figure 3-5As shown, the cross-section of the elastic ring 3 is set to be funnel-shaped. By setting the cross-section of the elastic ring 3 to be funnel-shaped, the end of the elastic ring 3 with a smaller opening will be firmly attached to the outside of the piston rod, so that impurities adhering to the piston rod can be blocked and cleaned. The diameter of the end of the elastic ring 3 away from the sealing ring body 1 is smaller than the diameter of the support ring 2. By setting the inner diameter of the end of the elastic ring 3 away from the sealing ring body 1 to be smaller than the inner diameter of the support ring 2, the end of the spring ring away from the support ring 2 will be stretched open by the piston rod and thereby firmly attached to the outside of the piston rod. A blocking chamber 6 for blocking impurities is provided between two adjacent support rings 2, and the hygroscopic cotton 5 is provided inside the blocking chamber 6. By setting a plurality of blocking chambers 6, the impurities can be blocked layer by layer.

[0030] By setting the elastic ring 3 with a funnel-shaped cross section, the end of the elastic ring 3 away from the support ring 2 will be firmly attached to the outside of the piston rod, thereby blocking and removing impurities adhering to the piston rod, preventing the impurities from contacting the sealing ring body 1 with the movement of the piston rod, and with the help of the elastic rings 3 on the multiple support rings 2, the utility model can perform multiple blocking of impurities, and at the same time, with the help of the moisture-absorbing cotton 5 in the multiple blocking chambers 6, water vapor can be absorbed multiple times, thereby ensuring the service life of the sealing ring body 1 and preventing the adhesion of impurities or water vapor from affecting the use effect of the sealing ring body 1.

[0031] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A pneumatic piston rod sealing ring, characterized in that: It comprises a sealing ring body (1) for sealing a pneumatic piston rod, and barrier components for removing dust and water vapor are provided on both sides of the sealing ring body (1); Each group of barrier components comprises a plurality of support rings (2) distributed at intervals, an elastic ring (3) being installed on the side of the support ring (2) away from the sealing ring body (1), a connecting ring (4) being arranged between two adjacent elastic rings (3), two ends of the connecting ring (4) being respectively fixed together with the sides close to the two adjacent elastic rings (3), a moisture-absorbing cotton (5) being arranged inside the connecting ring (4), and the moisture-absorbing cotton (5) being arranged between the two adjacent elastic rings (3).

2. A pneumatic piston rod sealing ring according to claim 1, characterized in that: The cross section of the elastic ring (3) is designed to be funnel-shaped.

3. The pneumatic piston rod sealing ring according to claim 1, characterized in that: The inner diameter of one end of the elastic ring (3) away from the sealing ring body (1) is smaller than the inner diameter of the support ring (2).

4. The pneumatic piston rod sealing ring according to claim 1, characterized in that: A blocking cavity (6) for blocking impurities is provided between two adjacent support rings (2), and the moisture-absorbing cotton (5) is arranged inside the blocking cavity (6).

5. The pneumatic piston rod sealing ring according to claim 1, characterized in that: The sealing ring body (1) comprises an outer ring (11) and an inner ring (12), wherein the outer ring (11) is sleeved outside the inner ring (12), a ring groove (13) is provided on a side of the outer ring (11) close to the inner ring (12), and the inner ring (12) is embedded in the ring groove (13); Two adjacent support rings (2) in the two groups of barrier components are respectively installed on both sides of the outer ring (11).

6. A pneumatic piston rod sealing ring according to claim 5, characterized in that: The inner diameter of the inner ring (12) is smaller than the inner diameter of the outer ring (11).

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