Sealing kit for air cylinder of pneumatic valve

Abstract

The utility model belongs to the technical field of sealing devices, and discloses a pneumatic valve cylinder sealing kit which comprises a cylinder body and a piston arranged in the cylinder body in a sliding mode, two sealing rings and a lubricating groove are annularly arranged on the outer wall, making contact with the inner wall of the cylinder body, of the piston, the lubricating groove is located between the two sealing rings, and an oil injection hole is formed in the upper end face of the piston. The oil injection hole is communicated with the lubricating groove through a lubricating channel in the piston. According to the air cylinder sealing kit of the pneumatic valve, lubricating liquid is injected between the piston and the inner wall of the cylinder body through the lubricating groove, the sealing ring is lubricated when the piston reciprocates up and down, and the service life of the sealing ring is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing devices, and particularly relates to a pneumatic valve cylinder sealing kit. Background Art

[0002] The driving device of the pneumatic valve is a cylinder, and the cylinder is provided with a seal. During use, the piston rod needs to move up and down reciprocally, and the seal also moves up and down reciprocally. After long-term use, the seal is worn, resulting in a relatively short service life. Content of the Utility Model

[0003] The utility model aims to solve the above technical problems at least to a certain extent. For this purpose, the purpose of the utility model is to provide a pneumatic valve cylinder sealing kit.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A pneumatic valve cylinder sealing kit includes a cylinder block and a piston slidably disposed in the cylinder block. Two sealing rings and a lubricating groove are provided on the outer wall of the piston in contact with the inner wall of the cylinder block. The lubricating groove is located between the two sealing rings. An oil injection hole is provided on the upper end surface of the piston, and the oil injection hole is communicated with the lubricating groove through a lubricating channel inside the piston.

[0006] Preferably, a shock pad is provided at the inner top of the cylinder block. The shock pad is disposed opposite to one of the oil injection holes, and an oil inlet hole is provided on the shock pad.

[0007] Preferably, a piston rod penetrates through the cylinder block, and the piston rod is connected to the piston. The cylinder block is connected to a bracket. The piston rod penetrates through the bracket. A guide sleeve is provided inside the bracket, and the guide sleeve is sleeved on the piston rod. A pressure ring is provided inside the cylinder block, and the lower end of the pressure ring abuts against the upper end of the guide sleeve.

[0008] The beneficial effects of the utility model are as follows:

[0009] For the pneumatic valve cylinder sealing kit provided by the utility model, lubricating liquid is injected between the piston and the inner wall of the cylinder block through the lubricating groove, which plays a lubricating role for the sealing ring when the piston moves up and down reciprocally, ensuring the service life of the sealing ring. Description of the Drawings

[0010] Figure 1 It is a cross-sectional view of the pneumatic valve cylinder sealing kit of the utility model.

[0011] In the figure: 1 - cylinder block; 2 - piston; 3 - sealing ring; 4 - lubricating groove; 5 - oil injection hole; 6 - lubricating channel; 7 - shock pad; 8 - oil inlet hole; 9 - piston rod; 10 - bracket; 11 - guide sleeve; 12 - pressure ring. Detailed Embodiment

[0012] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model. Components of the embodiments of the present utility model described and shown in the drawings here are generally arranged and designed in various different configurations.

[0013] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements.

[0014] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0015] As Figure 1 shown, the pneumatic valve cylinder sealing kit of this embodiment includes a cylinder block 1 and a piston 2 slidably arranged in the cylinder block 1. Two sealing rings 3 and a lubricating groove 4 are arranged on the outer wall of the piston 2 in contact with the inner wall of the cylinder block 1. The lubricating groove 4 is located between the two sealing rings 3. An oil injection hole 5 is arranged on the upper end surface of the piston 2. The oil injection hole 5 is communicated with the lubricating groove 4 through a lubricating channel 6 inside the piston 2. Lubricating liquid can be injected into the lubricating groove 4 through the oil injection hole 5 and the lubricating channel 6. The lubricating liquid in the lubricating groove 4 is always in contact with the inner wall of the cylinder block 1, and the lubricating liquid plays a lubricating role for the two sealing rings 3 when the piston 2 reciprocates up and down.

[0016] A shock pad 7 is arranged at the inner top of the cylinder block 1. The shock pad 7 is arranged opposite to one of the oil injection holes 5. An oil inlet hole 8 is arranged on the shock pad 7. The oil inlet hole 8 is communicated with the outside and the communication port can be sealed by a sealing cover. When the piston 2 rises, the shock pad 7 can prevent the piston 2 from directly and rigidly contacting the inner top of the cylinder block, improving the service life of the piston 2. At the same time, when the piston 2 contacts the shock pad 7, the oil injection hole 5 is communicated with the oil inlet hole 8, and lubricating liquid can also be injected through the oil inlet hole 8.

[0017] A piston rod 9 penetrates through the cylinder block 1. The piston rod 9 is connected to the piston 2. The cylinder block 1 is connected to a bracket 10. The piston rod 9 penetrates through the bracket 10. A guide sleeve 11 is arranged inside the bracket 10. The guide sleeve 11 is sleeved on the piston rod 9. A pressure ring 12 is arranged inside the cylinder block 1. The lower end of the pressure ring 12 abuts against the upper end of the guide sleeve 11. The guide sleeve 11 is used to guide the piston rod 9. At the same time, sealing rings are arranged on both the inner wall and the outer wall of the guide sleeve 11 to achieve sealing. The pressure ring 12 plays a role in fixing the guide sleeve 11.

[0018] The present utility model is not limited to the above-mentioned optional embodiments. Any person can obtain other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in its shape or structure, as long as the technical solutions fall within the scope defined by the claims of the present utility model, they shall fall within the protection scope of the present utility model.

Claims

1. A pneumatic valve cylinder seal kit, characterized in that: The invention comprises a cylinder body (1) and a piston (2) slidably arranged in the cylinder body (1); two sealing rings (3) and a lubrication groove (4) are arranged on the outer wall of the piston (2) which contacts the inner wall of the cylinder body (1); the lubrication groove (4) is located between the two sealing rings (3); an oil injection hole (5) is arranged on the upper end surface of the piston (2); the oil injection hole (5) and the lubrication groove (4) are connected through a lubrication channel (6) inside the piston (2).

2. The pneumatic valve cylinder seal kit according to claim 1, characterized in that: A shock absorbing pad (7) is provided on the inner top of the cylinder body (1), the shock absorbing pad (7) is arranged opposite to one of the oil filling holes (5), and an oil inlet hole (8) is provided on the shock absorbing pad (7).

3. The pneumatic valve cylinder seal kit according to claim 1, characterized in that: A piston rod (9) is passed through the cylinder body (1), and the piston rod (9) is connected to the piston (2).

4. The pneumatic valve cylinder seal kit according to claim 3, characterized in that: The cylinder body (1) is connected to a bracket (10), a piston rod (9) is inserted into the bracket (10), a guide sleeve (11) is arranged in the bracket (10), the guide sleeve (11) is sleeved on the piston rod (9), a pressure ring (12) is arranged in the cylinder body (1), and the lower end of the pressure ring (12) is in contact with the upper end of the guide sleeve (11).

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