Hydraulic oil cylinder applied to corrosive environment

Abstract

The utility model relates to a hydraulic transmission system element, and provides a hydraulic oil cylinder applied to a corrosive environment in order to solve the problems that a piston rod of an existing hydraulic oil cylinder is easy to corrode, is easy to bear force, is easy to leak oil and is not easy to perceive. The device comprises a hydraulic oil cylinder, a dust cover and a spherical hinge body, wherein the dust cover is hollowly sleeved on a piston rod and is connected with a lug ring and a flange; the dust cover can dynamically stretch out and draw back along the axial direction of the cylinder body according to the motion state of the piston rod; the earring comprises an earring seat and a pull ring arranged at one end of the earring seat, and the other end of the earring seat is connected with the dustproof cover; the spherical hinge body comprises a connecting rod and a sphere arranged at one end of the connecting rod; the lug ring seat is connected with the piston rod through a spherical hinge body, a square groove is formed in one end, close to the flange, of the lug ring seat, a sphere of the spherical hinge body is arranged in the groove, and a connecting rod of the spherical hinge body is connected with the piston rod. The dust cover can protect the exposed part of the piston rod; the spherical hinge body can relieve the problem that abrasion of the piston rod is aggravated due to tangential force.

Description

Technical Field

[0001] The utility model relates to a component of a hydraulic transmission system, in particular to a hydraulic cylinder applied to a corrosive environment. Background Art

[0002] The top pressure recovery turbine (TRT) power generation device is a secondary energy recovery device that converts the internal energy of high-temperature and high-pressure blast furnace gas into mechanical energy or electrical energy to achieve energy recycling. The hydraulic cylinder used in conjunction with the TRT is shown in Figure 3 , when the compressor medium is a corrosive medium such as gas, with the extension of the service time, the leakage of the medium is likely to cause corrosion to the hydraulic cylinder, accelerate the wear of the exposed part of the piston rod 091 and cause the leakage of the internal hydraulic oil, seriously affecting the normal operation and production efficiency of the TRT. Moreover, there is no oil drain hole provided on the cylinder body 08 of the existing hydraulic cylinder, making it difficult to detect the leakage of hydraulic oil in time; at the same time, the freedom degree of the earring 01 at the end of the piston rod 091 is limited, and it is easy to be stressed and jammed during operation. Content of the Utility Model

[0003] The purpose of the utility model is to solve the problems that the piston rod of the existing hydraulic cylinder is prone to corrosion, stress jamming, oil leakage and is not easy to detect, and to provide a hydraulic cylinder applied to a corrosive environment.

[0004] To achieve the above purpose, the technical solution provided by the utility model is:

[0005] A hydraulic cylinder applied to a corrosive environment includes a cylindrical cylinder body, a flange provided at one end of the cylinder body, a piston rod passing through the inside of the cylinder body and the middle of the flange, a piston provided in the cylinder body and sleeved on the piston rod, an earring provided at one end of the piston rod close to the flange, and a first sealing assembly and a second sealing assembly respectively provided at both ends of the cylinder body. The side wall of the cylinder body is provided with a first oil port and a second oil port; the special feature is that:

[0006] It further includes a ball joint body with both ends connected to the earring and the piston rod respectively, and a dust cover sleeved on the ball joint body and the piston rod and connected to the earring and the flange. The dust cover can expand and contract along the axial direction of the cylinder body according to the movement state of the piston rod;

[0007] The earring includes an earring seat and a pull ring provided at one end of the earring seat. The other end of the earring seat is connected to the dust cover; the ball joint body includes a connecting rod and a sphere provided at one end of the connecting rod;

[0008] A square groove is provided at one end of the earring seat close to the flange, the sphere of the ball joint body is arranged in the groove, and the connecting rod of the ball joint body is connected to the piston rod.

[0009] Further, the first sealing assembly and the second sealing assembly have the same structure, and both include a sealing ring seat sleeved on the piston rod and two O-ring seals sleeved on the sealing ring seat. A ring-shaped groove is provided between the two O-ring seals on each sealing ring seat. An oil leakage cavity is formed between the ring-shaped groove and the cylinder block. First oil leakage holes and second oil leakage holes communicated with the corresponding oil leakage cavities are respectively provided on the side walls at both ends of the cylinder block.

[0010] Further, the outer ends of the first oil leakage hole and the second oil leakage hole are respectively connected to an external hydraulic oil collection device.

[0011] Further, the dust cover is made of high-temperature resistant and oil-proof cloth.

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

[0013] 1. For a hydraulic cylinder applied to a corrosive environment provided by the present utility model, a dust cover is added to one end (i.e., the exposed part) of the piston rod close to the flange, which can protect the exposed part.

[0014] 2. For a hydraulic cylinder applied to a corrosive environment provided by the present utility model, the earring seat and the piston rod are connected through a spherical hinge body, so that the force on the piston rod is changed from line contact to surface contact, and the sphere of the spherical hinge body can rotate adaptively with the external force, alleviating the problem of aggravated wear of the piston rod caused by tangential force.

[0015] 3. For a hydraulic cylinder applied to a corrosive environment provided by the present utility model, oil leakage holes are provided on the side walls of the oil leakage cavity, which can collect and recycle the leaked hydraulic oil. Description of the Drawings

[0016] Figure 1 is a sectional view of an embodiment of a hydraulic cylinder applied to a corrosive environment of the present utility model;

[0017] Figure 2 is a three-dimensional structure diagram of an embodiment of a hydraulic cylinder applied to a corrosive environment of the present utility model;

[0018] Figure 1 and Figure 2 Explanation of the reference numerals in the drawings:

[0019] 1 - Earring; 2 - Sphere; 3 - Dust cover; 4 - Connecting rod; 5 - First oil leakage hole; 11 - Second oil leakage hole; 61 - First sealing assembly; 62 - Second sealing assembly; 7 - First oil port; 8 - Cylinder block; 9 - Piston, 91 - Piston rod; 10 - Second oil port; 12 - Flange.

[0020] Figure 3 is a three-dimensional structure diagram of an existing hydraulic cylinder;

[0021] Figure 3 Description of reference numerals:

[0022] 01-earring; 08-cylinder body; 091-piston rod. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] A hydraulic cylinder for use in corrosive environments, see Figure 1 and Figure 2 , including a cylindrical cylinder body 8, a flange 12 arranged at one end of the cylinder body 8, a piston rod 91 arranged through the inside of the cylinder body 8 and the middle of the flange 12, a piston 9 arranged in the cylinder body 8 and sleeved on the piston rod 91, an earring 1 arranged at one end of the piston 9 close to the flange 12, a first sealing component 61 and a second sealing component 62 respectively arranged at both ends of the cylinder body 8, a first oil port 7 and a second oil port 10 on the side wall of the cylinder body 8, and a dust cover 3 and a ball joint body hollowly sleeved on the piston rod and connected to the earring 1 and the flange 12, the dust cover 3 can be dynamically extended and retracted along the axial direction of the cylinder body 8 according to the movement state of the piston rod 91; the dust cover 3 is made of high-temperature resistant and oil-proof cloth, which is used to protect the exposed part of the piston rod 91.

[0025] The earring 1 includes an earring seat and a pull ring arranged at one end of the earring seat, and the other end of the earring seat is connected to the dust cover 3; the ball joint body includes a connecting rod 4 and a ball 2 arranged at one end of the connecting rod 4; the earring seat and the piston rod 91 are connected through the ball joint body, and a square groove is arranged at the end of the earring seat close to the flange 12, and the ball 2 of the ball joint body is arranged in the groove, and the connecting rod 4 of the ball joint body is connected to the piston rod 91. During the axial movement of the piston rod, the piston rod will be subjected to the reverse force of the driven mechanism, and there will be a tangential force, which will aggravate the wear of the piston rod. The ball joint body can change the force from line contact to surface contact, and the ball 2 can rotate adaptively with the external force, which solves the problem of aggravated wear of the piston rod 91 caused by the tangential force.

[0026] The first sealing assembly 61 and the second sealing assembly 62 have the same structure, both of which include a sealing ring seat sleeved on the piston rod 91 and two O-rings sleeved on the sealing ring seat. An annular groove is provided between the two O-rings on each sealing ring seat, and an oil drain cavity is formed between the annular groove and the cylinder body 8. The side walls at both ends of the cylinder body 8 are respectively provided with a first oil drain hole 5 and a second oil drain hole 11 connected to the corresponding oil drain cavity. The outer ends of the first oil drain hole 5 and the second oil drain hole 11 are respectively connected to an external hydraulic oil collection device.

[0027] The working principle of the hydraulic cylinder applied to the corrosive environment is as follows: The hydraulic oil enters from the first oil port 7 and discharges from the second oil port 10, or discharges from the second oil port 10 and discharges from the first oil port 7; it pushes the piston 9 to move axially and horizontally. The piston 9 drives the piston rod 91 to move. The piston rod 91 pushes and pulls the earring 1 to move axially and horizontally. The earring 1 drives the driven mechanism to run horizontally. The driven mechanism in the TRT is a crank-slider mechanism, which converts the horizontal motion into circular motion.

Claims

1. A hydraulic cylinder for use in a corrosive environment, comprising a cylindrical cylinder body (8), a flange (12) arranged at one end of the cylinder body (8), a piston rod (91) passing through the interior of the cylinder body (8) and arranged in the middle of the flange (12), a piston (9) arranged in the cylinder body (8) and sleeved on the piston rod (91), an earring (1) arranged at one end of the piston rod (91) close to the flange (12), and a first sealing assembly (61) and a second sealing assembly (62) respectively arranged at both ends of the cylinder body (8), wherein a first oil port (7) and a second oil port (10) are arranged on the side wall of the cylinder body (8); characterized in that: It also includes a ball joint body whose two ends are respectively connected to the earring (1) and the piston rod (91), and a dust cover (3) which is loosely sleeved on the ball joint body and the piston rod (91) and connected to the earring (1) and the flange (12), wherein the dust cover (3) can be extended and retracted along the axial direction of the cylinder body (8) according to the movement state of the piston rod (91); The earring (1) comprises an earring seat and a pull ring arranged at one end of the earring seat, and the other end of the earring seat is connected to a dust cover (3); the ball hinge body comprises a connecting rod (4) and a ball (2) arranged at one end of the connecting rod (4); A square groove is arranged at one end of the earring seat close to the flange (12), the ball (2) of the ball joint body is arranged in the groove, and the connecting rod (4) of the ball joint body is connected to the piston rod (91).

2. The hydraulic cylinder for use in a corrosive environment according to claim 1, characterized in that: The first sealing assembly (61) and the second sealing assembly (62) have the same structure, both comprising a sealing ring seat which is hollowly sleeved on the piston rod (91) and two O-rings sleeved on the sealing ring seat, an annular groove is provided between the two O-rings on each sealing ring seat, an oil drain chamber is formed between the annular groove and the cylinder body (8), and a first oil drain hole (5) and a second oil drain hole (11) which are connected to the corresponding oil drain chamber are respectively provided on the side walls at both ends of the cylinder body (8).

3. The hydraulic cylinder for use in a corrosive environment according to claim 2, characterized in that: The outer ends of the first oil drain hole (5) and the second oil drain hole (11) are respectively connected to an external hydraulic oil collecting device.

4. The hydraulic cylinder for use in a corrosive environment according to claim 3, characterized in that: The material of the dust cover (3) is high temperature resistant and oil proof cloth.

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