Cylinder for high temperature corrosive environment

Abstract

The present application relates to the technical field of oil cylinder, especially relates to a high-temperature corrosion environment used oil cylinder, which comprises an oil cylinder assembly and a guiding device, a piston rod is arranged in the oil cylinder assembly, and the piston rod penetrates the outside of the oil cylinder assembly; the guiding device is sleeved on the piston rod, and the piston rod is in sliding fit with the guiding device; the guiding device comprises a guiding assembly, the piston rod penetrates the guiding assembly, and the guiding assembly is in sliding fit with the piston rod; a sealing assembly is arranged between the guiding assembly and the piston rod, the sealing assembly plays a sealing role, and when the piston rod moves in the axial direction, the sealing assembly cleans the corrosive cinder on the piston rod. The high-temperature corrosion environment used oil cylinder, by installing the guiding device on the piston rod, guiding the piston rod through the guiding assembly, the sealing assembly plays a sealing role, and the piston rod is cleaned of cinder, so that the service life of the piston rod and the oil cylinder assembly is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil cylinder, in particular to an oil cylinder used in high-temperature corrosive environment. BACKGROUND

[0002] At present, the waste slurry and sludge recovered by the paper industry are combusted in a furnace to obtain high-pressure steam for power generation and industrial supply. The combusted slurry and sludge contain corrosive media such as sulfur dioxide and hydrogen chloride. After combustion, these media generate combustion ash. When the combustion ash in the furnace accumulates, an ash removal device is usually used to clean the combustion ash on the furnace. The oil cylinder drives the moving element on the ash removal device to remove the combustion ash, so that the combustion ash enters the ash accumulation chamber for cleaning. Therefore, the oil cylinder is used for a long time before being used again.

[0003] However, since the combustion ash contains corrosive media such as sulfur dioxide and hydrogen chloride, the combustion ash is corrosive and has a high temperature. The oil cylinder piston rod is exposed and moves for a long time before being used again. The existing oil cylinder structure is easily corroded in this special corrosive environment, resulting in a short service life of the oil cylinder. SUMMARY

[0004] The technical problem to be solved by the present application is that the existing oil cylinder structure is easily corroded in this special corrosive environment, resulting in a short service life of the oil cylinder.

[0005] To this end, the present application provides an oil cylinder used in a high-temperature corrosive environment. A guide device is installed on the piston rod. The guide assembly guides the piston rod. The sealing assembly plays a sealing role and cleans the combustion ash on the piston rod, thereby improving the service life of the piston rod and the oil cylinder assembly.

[0006] To solve the above technical problems, the present application provides the following technical scheme: an oil cylinder used in a high-temperature corrosive environment, comprising:

[0007] An oil cylinder assembly is provided with a piston rod. The piston rod passes through the outside of the oil cylinder assembly.

[0008] A guide device is sleeved on the piston rod. The piston rod and the guide device are in sliding fit.

[0009] The guide device includes a guide assembly. The piston rod penetrates the guide assembly. The guide assembly and the piston rod are in sliding fit.

[0010] A sealing assembly is provided between the guide assembly and the piston rod. The sealing assembly plays a sealing role. When the piston rod moves in the axial direction, the sealing assembly cleans the corrosive combustion ash on the piston rod.

[0011] Compared with the prior art, the application has the following beneficial effects: the oil cylinder used in the high-temperature corrosion environment of the application is used in the axial extension and retraction movement of the piston rod, the area where the combustion ash gathers is located at the front end of the piston rod, the guiding assembly guides the piston rod during the movement of the piston rod, the sealing assembly seals, the combustion ash is prevented from entering the guiding device, the combustion ash on the piston rod is scraped off by the sealing assembly, the piston rod is prevented from being corroded by the combustion ash, and the service life of the piston rod and the oil cylinder assembly is improved.

[0012] Preferably, the guiding device comprises a lubricating assembly, the lubricating assembly is installed on the guiding assembly, the guiding assembly is provided with a lubricating oil cavity in communication with the outer circumferential surface of the piston rod, and the oil outlet of the lubricating assembly is in communication with the lubricating oil cavity to lubricate while guiding the piston rod by the guiding assembly.

[0013] Preferably, the sealing assembly comprises two main sealing rings and two dustproof rings, the two main sealing rings are located at the front end of the guiding device, the sealing lips of the two main sealing rings face away from each other, and the two dustproof rings are respectively located at the front and rear ends of the guiding device.

[0014] Preferably, the main sealing ring is made of self-lubricating polyurethane, so that the main sealing ring can effectively scrape ash and adapt to a high-temperature environment.

[0015] Preferably, the dustproof ring is made of super-high-molecular polyethylene and rubber composite material, so that the dustproof ring can effectively scrape ash and adapt to a high-temperature environment.

[0016] Preferably, the piston rod is provided with an anti-corrosion plating layer.

[0017] Preferably, the lubricating assembly comprises an automatic oil injector and an oil pipe, one end of the oil pipe is connected with the automatic oil injector, and the other end of the oil pipe is in communication with the lubricating oil cavity.

[0018] Preferably, the guiding assembly comprises a front guiding seat, a connecting piece and a rear guiding seat, the front end of the connecting piece is connected with the front guiding seat, the rear end of the connecting piece is connected with the rear guiding seat, the sealing assembly is arranged on the front guiding seat, and the lubricating assembly is arranged on the rear guiding seat.

[0019] Preferably, the rear end of the front guiding seat is provided with a first step surface, and the front end of the connecting piece is positioned by matching the first step surface.

[0020] The rear end of the connecting piece is provided with a second step surface, and the front end of the rear guiding seat is positioned by matching the second step surface.

[0021] Preferably, the rear end of the front guiding seat is provided with a first guiding cylinder, the rear end of the connecting piece is provided with a second guiding cylinder, and the first guiding cylinder and the second guiding cylinder are both in sliding fit with the piston rod.

[0022] In order to make the above features and effects of the present application obvious and easy to understand, the following will be clearly and completely described through specific embodiments and in conjunction with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic diagram of the oil cylinder used in the high-temperature corrosion environment of the present application;

[0024] Figure 2 is a top view of the oil cylinder used in the high-temperature corrosion environment of the present application;

[0025] Figure 3 is a sectional view schematic diagram of the oil cylinder used in the high-temperature corrosion environment of the present application;

[0026] Figure 4 is a structural schematic diagram of the guiding device of the present application;

[0027] Figure 5 is an enlarged view of A in Figure 4

[0028] In the figure: 1, oil cylinder assembly; 2, piston rod; 3, guiding assembly; 4, lubricating assembly; 5, lubricating oil cavity; 6, main sealing ring; 7, dustproof ring; 8, automatic oiler; 9, oil pipe; 10, front guiding seat; 11, connecting piece; 12, rear guiding seat; 13, first step surface; 14, second step surface; 15, first guiding cylinder; 16, second guiding cylinder; 17, oil cylinder barrel; 18, oil cylinder piston; 19, oil cylinder guiding sleeve; 20, rear end cover; 21, stop pipe; 22, proximity switch; 23, secondary sealing ring. DETAILED DESCRIPTION

[0029] The specific embodiments of the present application will be described in detail below in conjunction with the drawings, which are not intended to limit the protection scope of the present application. The terms “front”, “rear”, “left”, “right”, “upper”, “lower” and the like indicate the orientation or positional relationship shown in the corresponding drawings, and are only used for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The terms “first” and “second” are only used to simplify the literal description to distinguish similar objects, and cannot be understood as the prior and subsequent relationship between the specific order. In the description of the present application, unless otherwise specified, the meaning of “multiple” is two or more.

[0030] ​In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be direct connection, or indirect connection through intermediate medium. For those skilled in the art, the corresponding meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] The oil cylinder for high-temperature corrosion environment is specifically described below with reference to the drawings.

[0032] Referring to Figures 1 to 5 The present application provides an oil cylinder for high-temperature corrosion environment, which is applied to a soot-blasting device. The oil cylinder comprises an oil cylinder assembly 1 and a guide device. A piston rod 2 is arranged in the oil cylinder assembly 1. The piston rod 2 penetrates out of the oil cylinder assembly 1. The oil cylinder piston 18 and the piston rod 2 are connected to the moving element of the soot-blasting device to drive the moving element of the soot-blasting device to perform soot-blasting. The oil cylinder assembly 1 is installed inside the soot-blasting device, and the piston rod 2 penetrates out of the soot-blasting device. The oil cylinder assembly 1 comprises an oil cylinder barrel 17, an oil cylinder piston 18, an oil cylinder guide sleeve 19 and a rear end cover 20. The oil cylinder barrel 17 is provided with a rodless cavity oil port and a rod cavity oil port. The oil cylinder guide sleeve 19 is threadedly connected to the front end of the oil cylinder barrel 17 and is provided with a sealing ring for sealing. The rear end cover 20 is connected to the rear end of the oil cylinder barrel 17. The piston rod 2 is connected to the oil cylinder piston 18. The front end of the piston rod 2 penetrates through the oil cylinder guide sleeve 19 and penetrates out of the cylinder barrel. A stop tube 21 is sleeved on the piston rod 2. The stop tube 21 is connected to the oil cylinder piston 18. The oil cylinder barrel 17 is provided with two proximity switches 22, which are respectively located at the two ends of the oil cylinder barrel 17. The proximity switches 22 sense the position of the stopper. Two O-shaped sealing rings and two guide rings are arranged between the stop tube 21 and the piston rod 2. The friction between the two O-shaped sealing rings and the piston rod 2 prevents the stop tube 21 from moving and affecting the sensing position. The two guide rings support and guide the piston rod 2 to prevent the piston rod 2 from being too long and too heavy and causing uneven load. The guide ring avoids direct contact between the piston rod 2 and the stop tube 21 to prevent the piston rod 2 from being damaged.

[0033] The guide device is sleeved on the piston rod 2, is installed outside the soot removing device, and is in sliding fit with the piston rod 2; the guide device comprises a guide assembly 3, the piston rod 2 penetrates through the guide assembly 3, and the guide assembly 3 is in sliding fit with the piston rod 2; a sealing assembly is arranged between the guide assembly 3 and the piston rod 2, the sealing assembly plays a sealing role, meanwhile, when the piston rod 2 moves in the axial direction, the sealing assembly cleans the corrosive soot on the piston rod 2, the sealing assembly comprises two main sealing rings 6 and two dustproof rings 7, the two main sealing rings 6 are located at the front end of the guide device, the sealing lips of the two main sealing rings 6 face away from each other, preferably, the main sealing ring 6 is made of self-lubricating polyurethane, so that the main sealing ring 6 can effectively scrape soot and adapt to a high-temperature environment, and the two dustproof rings 7 are respectively located at the front end and the rear end of the guide device, preferably, the dustproof ring 7 is made of super-high-molecular polyethylene and rubber composite material, so that the dustproof ring 7 can effectively scrape soot and adapt to a high-temperature environment, and specifically, the dustproof ring 7 is made of TPV-PE / BR blended thermoplastic elastomer.

[0034] The oil cylinder used in the high-temperature corrosive environment of the present application is used in the axial extension and retraction movement of the piston rod 2, the region where soot is accumulated is located at the front end of the piston rod 2, the guide assembly 3 guides the piston rod 2 when the piston rod 2 moves, the sealing assembly is sealed, so that soot is prevented from entering the guide device, meanwhile, the sealing assembly scrapes off the soot on the piston rod 2, so that the piston rod 2 is prevented from being corroded by soot, and the service life of the piston rod 2 and the oil cylinder assembly 1 is improved.

[0035] The guide device comprises a lubricating assembly 4, the lubricating assembly 4 is installed on the guide assembly 3, the guide assembly 3 is provided with a lubricating oil cavity 5 in communication with the outer circumferential surface of the piston rod 2, the oil outlet of the lubricating assembly 4 is in communication with the lubricating oil cavity 5, so that the guide assembly 3 guides the piston rod 2 while lubricating, the lubricating assembly 4 comprises an automatic oil injector 8 and an oil pipe 9, one end of the oil pipe 9 is connected with the automatic oil injector 8, and the other end is in communication with the lubricating oil cavity 5.

[0036] Because the soot removing device is closed, the oil cylinder is arranged in the soot removing device, if the oil cylinder fails and leaks due to uncontrollable factors, at this time, it cannot be directly observed, meanwhile, the temperature of soot is slightly high, and the leakage in the device can also cause some serious consequences, therefore, when the use stroke is met, the cylinder body of the oil cylinder is designed to be as short as possible, but the front end of the piston rod 2 is connected with a moving element of the soot removing device to remove soot, therefore, the piston rod 2 must be extended to be relatively long to enter the furnace device, therefore, the exposed piston rod 2 needs to be designed to be relatively long, at this time, the exposed piston rod 2 is in a corrosive environment and has a relatively long length, therefore, good support and protection are needed, in order to adapt to this environment, the exposed part of the piston rod 2 is provided with the guide assembly 3 and the lubricating assembly 4, the guide assembly 3 plays a guiding and supporting role, so that the piston rod 2 has effective support and guidance, and the lubricating assembly 4 comprises the automatic oil injector 8, so that the exposed piston rod 2 is effectively lubricated and dry friction is avoided.

[0037] The guide device is provided with two main sealing rings 6 and two dustproof rings 7, the two main sealing rings 6 are located at the front end of the guide device, the two dustproof rings 7 are respectively located at the front and rear ends of the guide device, and the rear end of the guide device is provided with a secondary sealing ring 23. When the oil cylinder reciprocates, the dustproof ring 7 can effectively wipe the burning ash adhered to the piston rod 2, effectively preventing the ash from corroding the exposed piston rod 2, and the main sealing ring 6 and the secondary sealing ring 23 can prevent the lubricating oil from leaking outward.

[0038] Because there is burning ash in the whole environment, the burning ash is a corrosive medium. Even if the piston rod 2 is exposed to a section with a lubricating assembly 4, the part of the piston rod 2 exposed outside the equipment will be adhered by the ash in the air. If the oil cylinder does not act for a long time, the exposed part of the piston rod 2 will be corroded very quickly. When the piston rod 2 extends during the action of the oil cylinder, the burning ash in the air will also adhere to the extended piston rod 2. As the use time of the oil cylinder is long, the piston rod 2 may also be corroded. When the corroded piston rod 2 retracts into the oil cylinder, the sealing ring will move on the pitted piston rod 2, which will have the risk of failure and even oil leakage. The service life of the oil cylinder is very short. In order to adapt to the high corrosion environment, the piston rod 2 is provided with a corrosion-resistant plating layer. The corrosion-resistant plating layer on the piston rod 2 is not an ordinary plating layer. The corrosion-resistant plating layer adopts ultrasonic flame spraying NiCrMoW corrosion resistance. The ordinary plating layer (Ni+Cr) is ineffective for this corrosive environment, and the piston rod 2 will fail quickly. The service life of the stainless steel is not long enough. The corrosion-resistant plating layer on the piston rod 2 is set to ultrasonic flame spraying NiCrMoW, which is the most effective.

[0039] The front side of the guide device is closest to the burning ash because it is close to the action element of the ash removal device. At this time, in order to adapt to the high temperature working condition and effectively wipe the ash, the material selection of the dustproof ring 7 is relatively harsh. The ultrahigh molecular polyethylene and rubber composite material can be used. The ultrahigh molecular polyethylene can effectively wipe the corrosive burning ash adhered to the piston rod 2 according to its hardness. In addition, the rubber composite can effectively adapt to the high temperature environment, so as to realize the functions of high temperature resistance and corrosion resistance and easy ash removal. The other two main sealing rings 6 are arranged back to back, the inner main sealing ring 6 prevents the lubricating oil from leaking outward, and the outer main sealing ring 6 plays an auxiliary dustproof role, which is double insurance. The main sealing ring 6 is made of self-lubricating polyurethane, which solves the difficulty of high temperature and no lubricating oil lubrication.

[0040] The guide assembly 3 comprises a front guide base 10, a connecting piece 11 and a rear guide base 12, the front end of the connecting piece 11 is connected with the front guide base 10, the rear end of the connecting piece 11 is connected with the rear guide base 12, the sealing assembly is arranged on the front guide base 10, the lubricating assembly 4 is arranged on the rear guide base 12, the rear end of the front guide base 10 is provided with a first step surface 13, the front end of the connecting piece 11 is positioned by cooperating with the first step surface 13; the rear end of the connecting piece 11 is provided with a second step surface 14, the front end of the rear guide base 12 is positioned by cooperating with the second step surface 14. The rear end of the front guide base 10 is provided with a first guide cylinder 15, the rear end of the connecting piece 11 is provided with a second guide cylinder 16, and the first guide cylinder 15 and the second guide cylinder 16 are both in sliding fit with the piston rod 2.

[0041] The oil cylinder used in the high-temperature corrosion environment has the following beneficial effects:

[0042] 1. In the high-corrosion environment, the guide assembly and the lubricating assembly 4 are arranged, and the lubricating assembly 4 is provided with an automatic oil injector 8, so that the support guide and self-lubrication are increased, thereby reducing the corrosion of the piston rod 2 and improving the service life of the piston rod 2;

[0043] 2. In order to adapt to the high-corrosion environment, the corrosion-resistant plating layer on the piston rod 2 is made of supersonic flame spraying NiCrMoW corrosion-resistant material, which effectively protects the piston rod 2 and avoids the corrosion of the piston rod 2 by the combustion ash, thereby further improving the service life of the piston rod 2;

[0044] 3. In order to effectively scrape ash and adapt to the high-temperature environment, the two main sealing rings 6 are made of self-lubricating polyurethane, and the sealing lips of the two main sealing rings 6 are arranged in opposite directions, which effectively prevent dust and leakage, and can meet the self-lubrication requirement, thereby lubricating the piston rod 2 while avoiding the combustion ash from entering the guide device and adhering to the piston rod 2;

[0045] 4. In order to effectively scrape ash and adapt to the high-temperature environment, the dust-proof ring 7 is made of super-high molecular polyethylene and rubber composite material, which effectively scrapes ash by the hardness of the dust-proof ring 7 and can adapt to the high-temperature environment, thereby having a long service life;

[0046] 5. The oil cylinder can be used in the high-temperature and high-corrosion double harsh environment, and is arranged in the ash removal device, so that the corrosion possibility in the ash removal device is small, the oil cylinder is protected, and the service life of the oil cylinder is improved;

[0047] 6. The stop pipe 21 is arranged on the piston rod 2 and located in the oil cylinder barrel 17, the stop pipe 21 can be used as the sensing part of the proximity switch 22 and can increase the guide, the guide ring arranged on the stop pipe 21 can prevent the bias load caused by the too long piston rod 2 exposed outside, improve the stability of the piston rod 2, and further improve the service life of the piston rod 2.

[0048] Therefore, the oil cylinder used in high-temperature corrosion environment of the present application can be used in high-temperature and strong corrosion environment, the service life of the piston rod 2 and the oil cylinder is long, the piston rod 2 will not be corroded even if it is not in action for a long time, the corrosion of the exposed part of the piston rod 2 caused by high temperature and strong corrosion environment is effectively avoided, the piston rod 2 and the oil cylinder are effectively prevented from being corroded and failed, can resist high temperature, have long service life, and reduce the cost of maintaining equipment and replacing the oil cylinder.

[0049] Finally, it should be noted that: the above examples are only used to illustrate the present application and not to limit the technical solutions described in the present application; therefore, although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that the present application can still be modified or replaced by equivalents; all technical solutions and improvements that do not deviate from the spirit and scope of the present application should be covered in the protection scope of the claims of the present application.

Claims

1. A cylinder for use in a high temperature corrosive environment, characterized in that, The utility model relates to a kind of oil cylinder assembly and its guiding device, including: Oil cylinder assembly (1), piston rod (2) is equipped in the oil cylinder assembly (1), the piston rod (2) passes out the outside of the oil cylinder assembly (1);Piston rod (2) is sleeved with stop tube (21), stop tube (21) is connected with oil cylinder piston (18), two proximity switches (22) are equipped on oil cylinder barrel (17), and two proximity switches (22) are located at the both ends of oil cylinder barrel (17) respectively; Guiding device, the guiding device is sleeved on the piston rod (2), and the piston rod (2) is slidably connected with guiding device; The guiding device includes guiding component (3), and the piston rod (2) penetrates guiding component (3), and the guiding component (3) is slidably connected with piston rod (2); Sealing assembly is arranged between the guiding component (3) and piston rod (2), and the sealing assembly plays a sealing role, while piston rod (2) moves in axial direction, and the sealing assembly cleans corrosive ash on piston rod (2); The sealing assembly includes two main sealing rings (6) and two dustproof rings (7), two main sealing rings (6) are located at the front end of guiding device, and the sealing lips of two main sealing rings (6) face away, and two dustproof rings (7) are located at the front and rear ends of guiding device respectively; The dustproof ring (7) is made of ultrahigh molecular polyethylene and rubber composite material, so that the dustproof ring (7) can effectively remove ash and adapt to high-temperature environment; The piston rod (2) is provided with an anti-corrosion plating layer, and the anti-corrosion plating layer is made of ultrasonic flame spraying NiCrMoW anti-corrosion.

2. The high temperature, corrosive environment cylinder of claim 1 wherein, The guiding device includes lubricating assembly (4), the lubricating assembly (4) is installed on guiding component (3), the guiding component (3) is provided with lubricating oil cavity (5) communicated with the outer circumferential surface of piston rod (2), and the oil outlet of lubricating assembly (4) is communicated with lubricating oil cavity (5), so as to lubricate while guiding component (3) guides piston rod (2).

3. The high temperature, corrosive environment cylinder of claim 1 wherein, The main sealing ring (6) is made of self-lubricating polyurethane, so that the main sealing ring (6) can effectively remove ash and adapt to high-temperature environment.

4. The high temperature, corrosive environment cylinder of claim 2, wherein, The lubricating assembly (4) includes automatic oiler (8) and oil pipe (9), one end of the oil pipe (9) is connected with the automatic oiler (8), and the other end is communicated with the lubricating oil cavity (5).

5. The high temperature, corrosive environment cylinder of claim 2 wherein, The guiding component (3) includes front guiding seat (10), connecting piece (11) and rear guiding seat (12), the front end of the connecting piece (11) is connected with the front guiding seat (10), the rear end of the connecting piece (11) is connected with the rear guiding seat (12), the sealing assembly is arranged on the front guiding seat (10), and the lubricating assembly (4) is arranged on the rear guiding seat (12).

6. The high temperature, corrosive environment cylinder of claim 5 wherein, The rear end of the front guiding seat (10) is provided with first step surface (13), and the front end of the connecting piece (11) is matched with the first step surface (13) for positioning; The rear end of the connecting piece (11) is provided with second step surface (14), and the front end of the rear guiding seat (12) is matched with the second step surface (14) for positioning.

7. The high temperature, corrosive environment cylinder of claim 6 wherein, The rear end of the front guide base (10) is provided with a first guide cylinder (15), and the rear end of the connecting piece (11) is provided with a second guide cylinder (16), both of which are in sliding fit with the piston rod (2).

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