CN210034024U - Novel air cylinder - Google Patents

Abstract

The utility model discloses a novel cylinder, including the cylinder body, be provided with piston and axle in the cylinder body respectively, the cylinder body is the plastics material, and the axle is the metal material, and the both ends of axle are provided with the double seal circle respectively. The utility model discloses simple structure, the cylinder body adopts the plastics material, can reduce the weight of cylinder, anticorrosives, and reduce cost, axle adopt the metal material can improve life, and both ends are provided with PTFE coating and double seal circle, can seal up anticorrosive, the utility model discloses can match cylinder body, axle, sealing washer and optimize, the performance improves, cost reduction.

Description

Novel air cylinder

Technical Field

The utility model relates to an air mechanical equipment technical field, specific saying so relates to a novel cylinder.

Background

At present, an axial cylinder is used as a driving device for an axial switch valve, and has been widely used for a long time due to simple and stable structure and lower cost than electric driving under the same torque; the existing axial cylinders on the market mainly have two types: firstly, adopt the metal material, cylinder body, cylinder cap, piston are aluminum alloy or stainless steel metal, and the axle is carbon steel or stainless steel metal, and the sealing material is NBR rubber.

The defects are as follows: 1) the metal cylinder body is heavy; 2) the surface of the aluminum alloy shell is easy to corrode in an acid mist environment; 3) the cost of the stainless steel body material is too high in the application of the acid mist environment; 4) the NBR rubber ring is fast aged in acid mist environment.

The other is made of plastic, the cylinder body and the cylinder cover are made of PPGF plastic, the piston is made of POM plastic, the shaft is made of a POM plastic sleeve stainless steel insert, and the outer sealing material is NBR rubber.

The defects are as follows: 1) when the POM plastic shaft is applied to a large cylinder diameter, particularly under the torque load of more than 20Nm, the POM plastic shaft is easy to deform, so that the pitch deviation stroke precision is poor, or the POM plastic shaft is directly clamped, and the service life of the POM plastic shaft is shorter than that of a metal shaft; 2) two ends of the stainless steel insert of the shaft are in direct contact with the environment, and are also corroded in an acid mist environment; 3) the NBR rubber ring is fast aged in an acid mist environment; 4) the single-acting cylinder uses a gas port, the upper port is connected with the atmosphere, and the spring can be corroded in an acid mist environment.

The above-mentioned drawbacks, worth improving.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a novel cylinder.

The utility model discloses technical scheme as follows:

the utility model provides a novel cylinder, includes the cylinder body, be provided with piston and axle in the cylinder body respectively, the cylinder body is the plastics material, the axle is the metal material, just the both ends of axle are provided with double seal circle respectively.

Furthermore, the cylinder body is made of PPGF plastic.

Further, the shaft is made of stainless steel.

Furthermore, the two end surfaces of the shaft are provided with anti-corrosion coatings, and the anti-corrosion coatings are PTFE coatings.

Furthermore, two ends of the shaft are respectively provided with a double-sealing ring groove, and the double-sealing ring grooves are internally provided with the double-sealing rings.

Furthermore, the double seal ring is made of FPM material.

Further, the piston is made of aluminum alloy.

Further, the piston is provided with a wear-resistant plate.

Further, the wear-resistant sheet is made of POM materials.

According to the above scheme the utility model discloses, its beneficial effect lies in, the utility model discloses simple structure, the cylinder body adopt the plastics material, can reduce the weight of cylinder, anticorrosives, and reduce cost, axle adopt the metal material can improve life, and both ends are provided with PTFE coating and double seal circle, can seal anticorrosive, the utility model discloses can match cylinder body, axle, sealing washer and optimize, the performance improves, cost reduction.

Drawings

Fig. 1 is an exploded view of the present invention.

Fig. 2 is a diagram of an embodiment of the present invention.

Fig. 3 is a cross-sectional view taken along the line B-B in fig. 2.

Fig. 4 is another embodiment of the present invention.

Fig. 5 is a cross-sectional view taken along the direction C-C in fig. 4.

In the figure, 1, a cylinder; 101. an upper air port; 102. a lower air port; 103. an inner cavity; 104. a lateral cavity; 2. a shaft; 201. a double seal ring groove; 3. a shaft bottom double sealing ring; 4. a shaft top double-sealing ring; 5. a gasket; 6. a protective cover; 7. an indicating cover; 8. a piston; 801. a piston double seal groove; 9 wear resistant pieces; 10. a piston double-sealing ring; 11. pre-tightening the spring set; 12. a cylinder cover sealing ring; 13. a cylinder cover; 14. a bolt; 15. and (5) sealing the cap.

Detailed Description

The invention is further described with reference to the following figures and embodiments:

as shown in fig. 1-5, a novel cylinder comprises a cylinder body 1, cylinder covers 13 are arranged on two sides of the cylinder body 1, a cylinder cover sealing ring 12 is arranged between the cylinder cover 13 and the cylinder body 1, the cylinder cover sealing ring 12 is made of FPM material, the cylinder cover 13 and the cylinder body 1 are fixedly connected through a bolt 14, and the bolt 14 is provided with a sealing cap 15 to enhance sealing and protect the bolt.

The inner cavity 103 of the cylinder body 1 is respectively provided with a piston 8 and a shaft 2, wherein the cylinder body 1 is made of plastic, the shaft 2 is made of metal, and two ends of the shaft 2 are respectively provided with double sealing rings.

Preferably, in one embodiment, the cylinder 1 is made of PPGF plastic, and the shaft 2 is made of stainless steel. The shaft 2 is made of SUS304 stainless steel or 316L stainless steel. The two end surfaces of the shaft 2 are provided with anti-corrosion coatings, and the anti-corrosion coatings are PTFE coatings.

Two ends of the shaft 2 are respectively provided with a double-sealing ring groove 201, and double sealing rings are arranged in the double-sealing ring grooves 201. The double seal ring is made of FPM material. Namely, the top end position of the shaft 2 is provided with a shaft top double-seal ring 4, and the bottom end position of the shaft 2 is provided with a shaft bottom double-seal ring 3. In addition, the top of axle 2 is provided with safety cover 6 and instruction lid 7, and safety cover 6 and cylinder body 1 fixed connection, and is provided with gasket 5 between safety cover 6 and the cylinder body 1, and gasket 5 is the POM material gasket.

The piston 8 is made of aluminum alloy. Preferably, the piston 8 is made of ADC12 aluminum alloy. The piston 8 is provided with a wear-resistant sheet and a piston double-sealing groove 801, and a piston double-sealing ring 10 is arranged in the piston double-sealing groove 801, wherein the wear-resistant sheet is made of POM material, and the piston double-sealing ring 10 is made of FPM material.

The utility model discloses simple structure, the cylinder body adopts the plastics material, can reduce the weight of cylinder, anticorrosives, and reduce cost, axle adopt the metal material can improve life, and both ends are provided with PTFE coating and double seal circle, can seal up anticorrosive, the utility model discloses can match cylinder body, axle, sealing washer and optimize, the performance improves, cost reduction.

The utility model discloses specific embodiment:

single-acting cylinder:

the lower air port 102 is used for air inlet and enters an inner cavity 103 of the PPGF plastic cylinder body 1, compressed air pushes the two ADC12 aluminum alloy pistons 8 to move in opposite directions towards two sides, the POM wear-resistant sheet 9 and the inner wall of the cylinder are in contact friction in motion, the rack of the piston 8 drives the tooth form of the stainless steel shaft 2 to axially rotate, and then the bottom of the shaft 2 drives an axial load. Compressed air is cut off when the device is reset, and the spring set 11 is pre-tightened through the electrophoretic coating to reset.

The single-acting cylinder is only provided with the lower air port 102 and is not provided with the upper air port 101, so that the inner cavity of the cylinder is not contacted with the atmospheric environment.

The upper air port 101 is not arranged, when in work, compressed air enters the inner cavity 103 of the air cylinder, the piston 8 is pushed to move, so that pressure generated by the side cavity 104 of the air cylinder cannot exhaust air, or the pressure is higher than the pressure of the inner cavity 103, and according to the known maximum volume of the side cavity and the design standard that the compressed length of the pre-tightening spring is smaller than 0.5, the volume of the compressed side cavity can be deduced to be larger than the original volume by 0.5. The calculation of the volume change and pressure relationship also requires consideration of the air medium and temperature according to the PV = nRT equation, and industrial compressed air is filtered and dried, which meets ideal gas conditions. According to the standard of the environment temperature of the maximum rated 70 ℃ of the cylinder, the pressure of the side cavity 104 can be calculated to be not higher than 1.7bar and far lower than the 6bar working pressure of the cylinder after the piston moves in place. Therefore, the technical scheme that only the lower air port is arranged and the upper air port 101 and the atmosphere communication hole are not arranged has no adverse effect on the work of the cylinder.

A double-acting cylinder:

the double-acting cylinder is not provided with a pre-tightening spring group 11, air enters a lower air port 102 and enters an inner cavity 103 of the PPGF plastic cylinder body 1, compressed air pushes two ADC12 aluminum alloy pistons 8 to move in opposite directions towards two sides, a POM wear-resistant plate 9 and the inner wall of the cylinder are in contact friction during movement, a piston rack drives an SUS304/316L stainless steel shaft gear to axially rotate, and then the bottom of a shaft 2 drives an axial load. When the device is reset, the air inlet of the upper air port enters the side cavity 104 of the PPGF plastic cylinder body 1 through the transverse through hole, the compressed air pushes the two ADC12 aluminum alloy pistons 8 to move towards the inner cavity 103, the piston rack drives the SUS304/316L stainless steel shaft gear to axially rotate, and then the shaft outputs an axial load.

In the double-action mode, the upper air port 101 and the lower air port 102 are used for air intake, and exhaust passes through the two-position five-way pilot valve, so that the inner cavity 103 and the side cavity 104 are not communicated with the atmosphere, and the corrosive environment has no influence on the inside of a cylinder cavity.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.

The above exemplary description of the present invention is made in conjunction with the accompanying drawings, and it is obvious that the present invention is not limited by the above manner, and various improvements made by the method concept and technical solution of the present invention or by directly applying the concept and technical solution of the present invention to other occasions without improvement are all within the protection scope of the present invention.

Claims (9)

1. The utility model provides a novel cylinder, includes the cylinder body, be provided with piston and axle in the cylinder body respectively, its characterized in that, the cylinder body is the plastics material, the axle is the metal material, just the both ends of axle are provided with double seal circle respectively.

2. The new cylinder as claimed in claim 1, characterized by the fact that said cylinder block is made of PPGF plastic material.

3. The new cylinder as claimed in claim 1 wherein said shaft is stainless steel.

4. The new cylinder as claimed in claim 1, wherein both end surfaces of the shaft are provided with an anti-corrosion coating, and the anti-corrosion coating is a PTFE coating.

5. The new cylinder as claimed in claim 1, wherein both ends of said shaft are respectively provided with a double seal groove, said double seal groove being provided with said double seal.

6. The new cylinder as claimed in claim 5, wherein said double gasket is made of FPM material.

7. The new cylinder as claimed in claim 1, wherein said piston is made of aluminum alloy.

8. The new cylinder as claimed in claim 1, wherein said piston is provided with wear plates.

9. The new cylinder as claimed in claim 8 wherein said wear plate is of POM material.

Images