Multi-stage sealing hydraulic sealing element

Abstract

The utility model discloses a multistage sealing hydraulic sealing element, which comprises a protective cylinder, a protective cover and a plastic packaging film, a piston is wrapped in an inner cavity of the plastic packaging film, the lower end of the piston is sleeved with a polytetrafluoroethylene sealing ring, and the middle end of the outer surface of the polytetrafluoroethylene sealing ring is fixedly connected with a butadiene rubber sealing ring. The upper end of the piston is sleeved with a nitrile rubber sealing ring. According to the utility model, through the arrangement of the plastic packaging film, good sealing protection can be formed around the piston, the nitrile rubber sealing ring, the polytetrafluoroethylene sealing ring and the cis-polybutadiene rubber sealing ring, so that the subsequent use is prevented from being influenced by dust contamination in the storage or transportation process; and the piston, the nitrile rubber sealing ring, the polytetrafluoroethylene sealing ring and the butadiene rubber sealing ring can be effectively stored, and damage caused by collision in the storage or transportation process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic seals, in particular to a multi-stage sealing hydraulic seal. Background Art

[0002] Seals are mechanisms that prevent leakage of working media and foreign matter from entering hydraulic components and systems. Although seals are auxiliary components in hydraulic equipment, the quality of seals and sealing devices is one of the key factors that directly affects whether the hydraulic system can work normally. Seals are also used in hydraulic cylinders. During the operation of the hydraulic cylinder, seals are needed to seal the connection between the piston and the inner wall of the cylinder.

[0003] However, the current hydraulic seals have poor wear resistance during use. During long-term use, the surface is easily worn, resulting in subsequent seal failure and leakage, which seriously reduces the overall service life and has an adverse impact on the normal operation of the hydraulic system. Utility Model Content

[0004] The utility model aims to provide a multi-stage sealing hydraulic seal, which has good sealing and wear-resistant effects and ensures the advantages of long-term and stable use of the whole.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multi-stage sealed hydraulic seal, comprising a protective tube, a protective cover and a plastic sealing film, the inner cavity of the plastic sealing film is wrapped with a piston, the lower end of the piston is sleeved with a polytetrafluoroethylene sealing ring, the middle end of the outer surface of the polytetrafluoroethylene sealing ring is fixedly connected to a butadiene rubber sealing ring, the upper end of the piston is sleeved with a nitrile rubber sealing ring, both ends of the nitrile rubber sealing ring are provided with annular cavities, the surface of the annular cavity is fixedly connected to a plastic support frame, and a support spring is fixedly connected between the inner surface of the plastic support frame and the surface of the annular cavity.

[0006] As a preferred solution, the inner cavity of the protective tube is fixedly connected to a sponge seat, and the outer surface of the plastic sealing film is movably connected to the inner cavity of the sponge seat.

[0007] As a preferred solution, a reinforcement strip is fixedly connected to the lower end of the outer surface of the protective tube, and the number of the reinforcement strips is eight.

[0008] As a preferred solution, an anti-skid bump is fixedly connected to the outer surface of the protective cover, and the anti-skid bump is in a rectangular shape.

[0009] As a preferred solution, an opening is formed on the surface of the plastic support frame, and the shape of the plastic support frame is annular.

[0010] As a preferred solution, a first thread groove is formed at the upper end of the outer surface of the protective tube, and a second thread groove is formed at the lower end of the inner cavity of the protective cover.

[0011] As a preferred solution, a sponge stopper is fixedly connected to the top of the inner cavity of the protective cover, and the thickness of the sponge stopper is two centimeters.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] 1. The utility model can form good sealing protection around the piston, the nitrile rubber sealing ring, the polytetrafluoroethylene sealing ring and the cis-butadiene rubber sealing ring through the setting of the plastic sealing film, so as to avoid dust contamination during storage or transportation and affect subsequent use, and through the setting of the protective tube and the protective cover, it is convenient to effectively store the piston, the nitrile rubber sealing ring, the polytetrafluoroethylene sealing ring and the cis-butadiene rubber sealing ring, so as to avoid damage caused by collision during storage or transportation. At the same time, since the nitrile rubber sealing ring, the polytetrafluoroethylene sealing ring and the cis-butadiene rubber sealing ring all have good wear resistance, during use, a multi-level sealing protection can be formed around the piston, while the probability of sealing failure caused by wear is effectively reduced, and the overall sealing performance is improved. At the same time, through the setting of the supporting spring and the plastic supporting frame, the plastic supporting frame can be pushed to support the upper and lower ends of the nitrile rubber sealing ring under the action of the tension of the supporting spring, so that the two ends of the nitrile rubber sealing ring can be in close contact with the inner wall of the cylinder, thereby further improving the overall sealing performance, which is conducive to use by personnel.

[0014] 2. The utility model can provide effective protection around the piston, nitrile rubber sealing ring, polytetrafluoroethylene sealing ring and butadiene rubber sealing ring by setting a sponge seat to avoid damage caused by collision during storage or transportation. The purpose of strengthening the protection around the protective cylinder is achieved by setting a reinforcing strip. The anti-skid protrusion improves the anti-skid performance around the protective cover, making it convenient for personnel to open the protective cover and the protective cylinder. The sponge stopper can facilitate the top of the piston to be limited during the closing process between the protective cover and the protective cylinder to avoid large displacement of the piston during storage and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 3 This is a partial cross-sectional structural diagram of the piston of the utility model;

[0018] Figure 4This is a schematic diagram of the structure of the plastic support frame of the utility model;

[0019] Figure 5 For this utility model Figure 2 A partial enlarged view of point A in the middle.

[0020] In the figure: 1. Protective tube; 2. Reinforcement strip; 3. Plastic sealing film; 4. Sponge seat; 5. Anti-slip bump; 6. Protective cover; 7. Sponge stopper; 8. Piston; 9. Annular cavity; 10. Support spring; 11. Plastic support frame; 12. Nitrile rubber sealing ring; 13. Opening; 14. Polytetrafluoroethylene sealing ring; 15. Butadiene rubber sealing ring. DETAILED DESCRIPTION

[0021] 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.

[0022] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0023] Embodiment 1:

[0024] See also Figure 1-Figure 5 As shown, the utility model provides a multi-stage sealed hydraulic seal, including a protective tube 1, a protective cover 6 and a plastic sealing film 3, the inner cavity of the plastic sealing film 3 is wrapped with a piston 8, the lower end of the piston 8 is sleeved with a polytetrafluoroethylene sealing ring 14, the middle end of the outer surface of the polytetrafluoroethylene sealing ring 14 is fixedly connected with a butadiene rubber sealing ring 15, the upper end of the piston 8 is sleeved with a nitrile rubber sealing ring 12, both ends of the nitrile rubber sealing ring 12 are provided with annular cavities 9, the surface of the annular cavity 9 is fixedly connected with a plastic support frame 11, and a support spring 10 is fixedly connected between the inner surface of the plastic support frame 11 and the surface of the annular cavity 9.

[0025] In the technical scheme, by setting the plastic film 3, a good sealing protection can be formed around the piston 8, the nitrile rubber sealing ring 12, the polytetrafluoroethylene sealing ring 14 and the butadiene rubber sealing ring 15, so as to avoid dust contamination during storage or transportation and affect subsequent use. By setting the protective tube 1 and the protective cover 6, it is convenient to effectively store the piston 8, the nitrile rubber sealing ring 12, the polytetrafluoroethylene sealing ring 14 and the butadiene rubber sealing ring 15, so as to avoid damage caused by collision during storage or transportation. At the same time, due to the nitrile rubber sealing ring 12, the polytetrafluoroethylene sealing ring 14 Both the nitrile rubber sealing ring 15 have good wear resistance. During use, they can form a multi-level sealing protection around the piston 8, effectively reducing the probability of sealing failure due to wear and improving the overall sealing performance. At the same time, through the setting of the support spring 10 and the plastic support frame 11, the plastic support frame 11 can be pushed under the action of the tension of the support spring 10 to support the upper and lower ends of the nitrile rubber sealing ring 12, so that the two ends of the nitrile rubber sealing ring 12 can be tightly attached to the inner wall of the cylinder, thereby further improving the overall sealing performance and facilitating use by personnel.

[0026] Embodiment 2:

[0027] On the basis of embodiment 1, the present invention is as follows Figure 1 , Figure 2 and Figure 5 As shown, it is disclosed that the inner cavity of the protective tube 1 is fixedly connected to a sponge seat 4, the outer surface of the plastic sealing film 3 is movably connected to the inner cavity of the sponge seat 4, the lower end of the outer surface of the protective tube 1 is fixedly connected to a reinforcing strip 2, the number of the reinforcing strips 2 is eight, the outer surface of the protective cover 6 is fixedly connected to an anti-slip protrusion 5, the shape of the anti-slip protrusion 5 is rectangular, the surface of the plastic support frame 11 is provided with an opening 13, the shape of the plastic support frame 11 is annular, the upper end of the outer surface of the protective tube 1 is provided with a first threaded groove, the lower end of the inner cavity of the protective cover 6 is provided with a second threaded groove, the top of the inner cavity of the protective cover 6 is fixedly connected to a sponge stopper 7, the thickness of the sponge stopper 7 is two centimeters.

[0028] In the present technical solution, by setting the sponge seat 4, effective protection can be provided around the piston 8, the nitrile rubber sealing ring 12, the polytetrafluoroethylene sealing ring 14 and the butadiene rubber sealing ring 15 to avoid damage caused by collision during storage or transportation. By setting the reinforcing strip 2, the purpose of strengthening the protection around the protective cylinder 1 is achieved. By setting the anti-slip protrusion 5, the anti-slip performance around the protective cover 6 is improved, which facilitates personnel to open the protective cover 6 and the protective cylinder 1. By setting the sponge stopper 7, it is convenient to limit the top of the piston 8 during the closing process between the protective cover 6 and the protective cylinder 1, so as to avoid large displacement of the piston 8 during storage and transportation.

[0029] The working principle of the utility model is as follows: through the setting of the plastic sealing film 3, a good sealing protection can be formed around the piston 8, the nitrile rubber sealing ring 12, the polytetrafluoroethylene sealing ring 14 and the butadiene rubber sealing ring 15 to avoid dust contamination during storage or transportation and affecting subsequent use, and through the setting of the protective tube 1 and the protective cover 6, the piston 8, the nitrile rubber sealing ring 12, the polytetrafluoroethylene sealing ring 14 and the butadiene rubber sealing ring 15 can be effectively stored to avoid damage caused by collision during storage or transportation. At the same time, due to the nitrile rubber sealing ring 12, the polytetrafluoroethylene sealing ring 14 and the butyl rubber sealing ring 15 both have good wear resistance. During use, they can form a multi-level sealing protection around the piston 8, effectively reducing the probability of sealing failure due to wear and tear, and improving the overall sealing performance. At the same time, through the arrangement of the support spring 10 and the plastic support frame 11, the plastic support frame 11 can be pushed under the action of the tension of the support spring 10 to support the upper and lower ends of the nitrile rubber sealing ring 12, so that the two ends of the nitrile rubber sealing ring 12 can be tightly attached to the inner wall of the cylinder, thereby further improving the overall sealing performance and facilitating use by personnel.

[0030] Importantly, it should be noted that the construction and arrangement of the present application shown in a number of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also an equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0031] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention).

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A multi-stage sealing hydraulic seal, comprising a protective tube (1), a protective cover (6) and a plastic sealing film (3), characterized in that: The inner cavity of the plastic sealing film (3) is wrapped with a piston (8), the lower end of the piston (8) is sleeved with a polytetrafluoroethylene sealing ring (14), the middle end of the outer surface of the polytetrafluoroethylene sealing ring (14) is fixedly connected to a butadiene rubber sealing ring (15), the upper end of the piston (8) is sleeved with a nitrile rubber sealing ring (12), both ends of the nitrile rubber sealing ring (12) are provided with an annular cavity (9), the surface of the annular cavity (9) is fixedly connected to a plastic support frame (11), and a support spring (10) is fixedly connected between the inner surface of the plastic support frame (11) and the surface of the annular cavity (9).

2. A multi-stage sealing hydraulic seal according to claim 1, characterized in that: The inner cavity of the protective tube (1) is fixedly connected to a sponge seat (4), and the outer surface of the plastic sealing film (3) is movably connected to the inner cavity of the sponge seat (4).

3. A multi-stage sealing hydraulic seal according to claim 1, characterized in that: A reinforcement strip (2) is fixedly connected to the lower end of the outer surface of the protective tube (1), and the number of the reinforcement strips (2) is eight.

4. The multi-stage sealing hydraulic seal according to claim 1, characterized in that: The outer surface of the protective cover (6) is fixedly connected with an anti-skid protrusion (5), and the anti-skid protrusion (5) is in the shape of a rectangle.

5. The multi-stage sealing hydraulic seal according to claim 1, characterized in that: An opening (13) is provided on the surface of the plastic support frame (11), and the shape of the plastic support frame (11) is annular.

6. The multi-stage sealing hydraulic seal according to claim 1, characterized in that: A first thread groove is formed at the upper end of the outer surface of the protective tube (1), and a second thread groove is formed at the lower end of the inner cavity of the protective cover (6).

7. The multi-stage sealing hydraulic seal according to claim 1, characterized in that: A sponge stopper (7) is fixedly connected to the top of the inner cavity of the protective cover (6), and the thickness of the sponge stopper (7) is two centimeters.

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