Hydraulic cylinder, hydraulic support and engineering equipment

Abstract

The present invention provides a hydraulic cylinder, a hydraulic support and an engineering device. The hydraulic cylinder includes: a cylinder block; a piston assembly movably disposed within the cylinder block; an anode block, which is provided on the cylinder block and / or the piston assembly. When the cylinder block is filled with a hydraulic working medium, the anode block and the cylinder block and / or the piston assembly form a primary battery, and the anode block is consumed as the anode, while the cylinder block and / or the piston assembly serves as the cathode and is protected from corrosion. The present invention is provided with an anode block on the cylinder block and / or the piston assembly to protect the cylinder block and / or the piston assembly, preventing the cylinder block or the piston assembly from being corroded in an emulsion or water medium, and improving the service life and safety of the hydraulic cylinder.

Description

Technical Field

[0001] This application belongs to the field of hydraulic technology. Specifically, it relates to a hydraulic cylinder, a hydraulic support, and an engineering equipment. Background Art

[0002] The hydraulic cylinder is an important safety guarantee device for underground coal mining, supporting the coal seam and providing a safe operating space for the coal shearer and personnel. The hydraulic power transmission medium of the hydraulic cylinder is mainly emulsion or water. When the emulsion concentration is insufficient or the water decays, it will cause corrosion to the cylinder body or piston assembly of the hydraulic cylinder, seriously affecting the safety and service life of the hydraulic cylinder.

[0003] Therefore, providing a hydraulic cylinder that can avoid the corrosion of the cylinder body or piston assembly by emulsion or water has become an urgent problem to be solved at present. Summary of the Invention

[0004] The present invention aims to solve or improve at least one of the above technical problems.

[0005] The first aspect of the present invention provides a hydraulic cylinder.

[0006] The second aspect of the present invention provides a hydraulic support.

[0007] The third aspect of the present invention provides an engineering equipment.

[0008] The technical solution of the first aspect of the present invention provides a hydraulic cylinder including: a cylinder body; a piston assembly movably disposed within the cylinder body; an anode block, the anode block is disposed on the cylinder body and / or the piston assembly. When the cylinder body is filled with a hydraulic medium, the anode block and the cylinder body and / or the piston assembly form a primary battery, and the anode block is consumed as the anode, and the cylinder body and / or the piston assembly are used as the cathode to precipitate gas and avoid corrosion.

[0009] The hydraulic cylinder provided by the present invention includes: a cylinder body, a piston assembly, and an anode block. The piston assembly is movably disposed within the cylinder body; the anode block is disposed on the cylinder body and / or the piston assembly. The anode block may include metal alloys such as zinc alloy, aluminum alloy, or magnesium alloy, or may also include pure metals such as zinc, aluminum, or magnesium. Since the anode block is more chemically active than the cylinder body and / or the piston assembly, when the cylinder body is filled with a hydraulic working medium, the anode block and the cylinder body and / or the piston assembly form a primary battery, and the anode block is consumed as the anode, and the cylinder body and / or the piston assembly are protected as the cathode. In this way, the cylinder body and / or the piston assembly can be protected by consuming the anode block. The present invention is provided with an anode block on the cylinder body and / or the piston assembly, which can protect the cylinder body and / or the piston assembly and avoid the corrosion of the cylinder body or piston assembly by emulsion or water, thereby improving the service life of the hydraulic cylinder.

[0010] In the above technical solution, the cylinder block includes a cylinder barrel having a first end and a second end disposed opposite to each other; a cylinder bottom disposed at the first end of the cylinder barrel; a piston disposed inside the cylinder barrel; and a piston rod, one end of which is located outside the cylinder barrel and the other end of which is inserted into the cylinder barrel from the second end of the cylinder barrel and connected to the piston.

[0011] In this technical solution, the cylinder block includes a cylinder barrel, a cylinder bottom, a piston and a piston rod. The cylinder barrel has a first end and a second end disposed opposite to each other. The cylinder bottom is disposed at the first end of the cylinder barrel. The piston is disposed inside the cylinder barrel. One end of the piston rod is located outside the cylinder barrel and the other end of which is inserted into the cylinder barrel from the second end of the cylinder barrel and connected to the piston. Such an arrangement is conducive to the overall assembly of the cylinder block.

[0012] In the above technical solution, a first anode block is provided on the inner surface of the cylinder bottom.

[0013] In this technical solution, a first anode block is provided on the inner surface of the cylinder bottom. In this way, when the cylinder block is filled with a hydraulic medium, a primary battery is formed between the first anode block and the inner surface of the cylinder bottom, which can protect the cylinder bottom.

[0014] In the above technical solution, a second anode block is provided at the bottom of the piston rod.

[0015] In this technical solution, a second anode block is provided at the bottom of the piston rod. In this way, when the cylinder block is filled with a hydraulic medium, a primary battery is formed between the second anode block and the piston rod, which can protect the piston rod.

[0016] In the above technical solution, a third anode block is provided on the piston.

[0017] In this technical solution, a third anode block is provided on the piston. In this way, when the cylinder block is filled with a hydraulic medium, a primary battery is formed between the third anode block and the piston, which can protect the piston.

[0018] In the above technical solution, the end of the piston rod connected to the piston penetrates the piston and extends towards the cylinder bottom. A second anode block is provided at the portion of the piston rod located between the piston and the cylinder bottom; or, a second anode block is provided at the portion of the piston rod located between the piston and the second end of the cylinder barrel; a third anode block is provided at the end of the piston away from the cylinder bottom.

[0019] In this technical solution, one end of the piston rod connected to the piston penetrates through the piston and extends towards the bottom of the cylinder. The second anode block can be arranged on the part of the piston rod between the piston and the bottom of the cylinder. Of course, it can also be arranged on the part of the piston rod between the piston and the second end of the cylinder barrel. Further, second anode blocks can be arranged both on the part of the piston rod between the piston and the bottom of the cylinder and on the part of the piston rod between the piston and the second end of the cylinder barrel, so as to ensure that the parts in the whole cavity can be protected. Further, since the corrosion at the bottom of the piston rod is relatively common, the second anode block can be arranged at one end of the piston rod close to the bottom of the cylinder. Further, a third anode block is arranged at one end of the piston away from the bottom of the cylinder. Of course, a third anode block can also be arranged at one end of the piston close to the bottom of the cylinder, so as to protect the piston through the third anode block. Further, since one end of the piston rod connected to the piston penetrates through the piston and extends towards the bottom of the cylinder, during the movement of the piston, the piston rod can contact the bottom of the cylinder, avoiding the problem that the piston blocks the liquid inlet and causes the hydraulic medium not to enter.

[0020] In the above technical solution, the hydraulic cylinder further includes an elastic conductive member, one end of which is connected to the first anode block and the other end is connected to the second anode block.

[0021] In this technical solution, the hydraulic cylinder further includes an elastic conductive member, one end of which is connected to the first anode block and the other end is connected to the second anode block. In this way, during the movement of the piston, the elastic conductive member can undergo elastic deformation. At the same time, since the two ends of the elastic conductive member are respectively connected to the first anode block and the second anode block, it is equivalent to connecting the first anode block and the second anode block in series. During the consumption of the anode, the first anode block and the second anode block can be consumed simultaneously, solving the problem that the first anode block is consumed too fast and is not easy to replace. It can be understood that the first anode block is arranged at one end of the bottom of the cylinder, while the second anode block is arranged on the piston rod. When replacing the anode block, the piston rod is very easy to disassemble, but the anode block at the bottom of the cylinder is not easy to replace. If an elastic conductive member is not arranged between the first anode block and the second anode block, the first anode block is easily consumed, resulting in the problem that the first anode block is difficult to replace.

[0022] In the above technical solution, the piston assembly further includes a guide sleeve, which is fixedly arranged at the second end of the cylinder barrel. One end of the piston rod connected to the piston is inserted into the cylinder barrel through the guide sleeve, and a fourth anode block is arranged at one end of the guide sleeve close to the bottom of the cylinder.

[0023] In this technical solution, the piston assembly further includes a guide sleeve, which is fixedly arranged at the second end of the cylinder barrel. One end of the piston rod connected to the piston is inserted into the cylinder barrel through the guide sleeve, so that the piston rod can be guided through the guide sleeve. Further, a fourth anode block is arranged at one end of the guide sleeve close to the bottom of the cylinder, so as to protect the guide sleeve and the inner wall of the cylinder barrel through the fourth anode block.

[0024] In the above technical solution, the outer surface of the anode block is provided with external threads or screw holes, and the cylinder block and / or the piston assembly are provided with screw holes or threads, and the anode block can be screwed into the screw hole through the external threads.

[0025] In this technical solution, the outer surface of the anode block is provided with external threads or screw holes, and the cylinder block and / or the piston assembly are provided with screw holes or threads. The anode block is screwed to the cylinder block and / or the piston assembly. By providing external threads or screw holes on the outer surface of the anode block and then thread-connecting it to the cylinder block and / or the piston assembly, there is no need to set other fixing structures, which improves the assembly efficiency of the anode block and the cylinder block and / or the piston assembly. Of course, the anode block and the cylinder block and / or the piston assembly can also be connected by bolts as needed. When connecting by bolts, sealant is applied above the installed bolts to prevent the bolts from falling off.

[0026] In the above technical solution, the anode block and the cylinder block are of an integral structure, and the anode block and the piston assembly are of an integral structure.

[0027] In this technical solution, the anode block and the cylinder block are of an integral structure, and the anode block and the piston assembly are of an integral structure. For example, the anode block can be connected to the cylinder block and / or the piston assembly by the method of secondary casting. Of course, the anode block can also be plated on the cylinder block and / or the piston assembly by hot dip plating or electroplating to prevent the anode block from falling off.

[0028] In the above technical solution, the temperature of the hydraulic medium filled in the cylinder block is less than or equal to 55 °C, the pH value of the hydraulic medium is 4.5 to 10.5, and the conductivity of the hydraulic medium is greater than or equal to 1.5 ms / cm.

[0029] In this technical solution, in order to ensure the effectiveness of the anode and effectively protect the cylinder block and the piston assembly, the temperature of the hydraulic medium filled in the cylinder block is less than or equal to 60 °C, further less than or equal to 55 °C, the pH value of the hydraulic medium is 4 to 11, and further, the pH value is 4.5 to 10.5. The conductivity of the hydraulic medium is greater than or equal to 1 ms / cm, and further still, the conductivity of the hydraulic medium is greater than or equal to 1.5 ms / cm. This can avoid the situation of passivation or serious consumption on the surface of the anode block.

[0030] In the above technical solution, the anode block includes zinc alloy, aluminum alloy or magnesium alloy.

[0031] In this technical solution, the anode block includes zinc alloy, such as Zn-Al-Cd. Of course, aluminum alloy or magnesium alloy can also be used according to requirements.

[0032] The hydraulic support provided by the second aspect technical solution of the present invention includes the hydraulic cylinder provided by any one of the technical solutions in the first aspect of the present application. Since the hydraulic support provided by the second aspect technical solution of the present invention includes the hydraulic cylinder provided by any one of the technical solutions in the first aspect of the present application, therefore, the hydraulic support provided by the second aspect of the present invention has all the beneficial effects of the hydraulic cylinder provided by any one of the technical solutions in the first aspect of the present application, which will not be elaborated herein.

[0033] The third aspect of the present invention provides an engineering equipment, which includes the hydraulic cylinder provided by any one of the technical solutions in the first aspect of the present application, or includes the hydraulic support provided by the second aspect technical solution of the present application. The engineering equipment mainly includes well operation equipment such as hydraulic supports and shearers, and can also be used in work vehicles such as heavy trucks, trailers, excavators, roadheader loaders, bulldozers, rollers, and concrete pump trucks, or mechanical operation equipment such as tower cranes, construction elevators, and material hoists.

[0034] The engineering equipment provided by the third aspect of the present invention includes the hydraulic cylinder provided by any one of the technical solutions in the first aspect of the present application. Therefore, the engineering equipment provided by the third aspect of the present invention has all the beneficial effects of the hydraulic cylinder provided by any one of the technical solutions in the first aspect of the present application, which will not be elaborated herein.

[0035] The additional aspects and advantages according to the present invention will become apparent in the following description part, or will be understood by practicing according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and / or additional aspects and advantages of the embodiments according to the present invention will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0037] Figure 1 The structural schematic diagram of the hydraulic cylinder provided by the embodiment of the present invention is shown;

[0038] Figure 2 The structural schematic diagram of the guide sleeve part of the hydraulic cylinder provided by the embodiment of the present invention is shown;

[0039] Figure 3 The structural schematic diagram of the piston part of the hydraulic cylinder provided by the embodiment of the present invention is shown;

[0040] Figure 4 The structural schematic diagram of the piston rod part of the hydraulic cylinder provided by the embodiment of the present invention is shown.

[0041] Among them, Figures 1 to 4 The corresponding relationship between the component names and reference numerals in

[0042] 1 cylinder block, 11 cylinder liners, 112 first liquid inlet, 114 second liquid inlet, 12 cylinder bottom, 2 piston assembly, 21 piston, 22 piston rod, 222 piston rod earring, 23 guide sleeve, 31 first anode block, 32 second anode block, 33 third anode block, 34 fourth anode block, 4 first seal, 5 O-ring, 6 dust seal, 7 second seal, 8 third seal, 9 fourth seal. Detailed implementation manners

[0043] In order to more clearly understand the above aspects, features and advantages of the embodiments according to the present invention, the embodiments according to the present invention will be further described in detail below with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0044] In the following description, many specific details are set forth in order to fully understand the embodiments according to the present invention. However, the embodiments according to the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the embodiments according to the present invention is not limited by the specific embodiments disclosed below.

[0045] Embodiment 1

[0046] As Figure 1 shown, an embodiment of the first aspect of the present invention provides a hydraulic cylinder including: a cylinder block 1; a piston assembly 2 movably disposed in the cylinder block 1; an anode block, an anode block is disposed on the cylinder block 1 and / or the piston assembly 2. When the cylinder block 1 is filled with a hydraulic medium, the anode block and the cylinder block 1 and / or the piston assembly 2 form a primary battery, the anode block is consumed as the anode, and the cylinder block 1 and / or the piston assembly 2 serves as the cathode to precipitate gas.

[0047] The hydraulic cylinder provided in this embodiment includes: a cylinder block 1, a piston assembly 2 and an anode block. The piston assembly 2 is movably disposed in the cylinder block 1; the anode block is disposed on the cylinder block 1 and / or the piston assembly 2. The anode block may include metal alloys such as zinc alloy, aluminum alloy or magnesium alloy, or may also include metal elements such as zinc, aluminum or magnesium. Since the anode block is more chemically active than the cylinder block 1 and / or the piston assembly 2, when the cylinder block 1 is filled with a hydraulic medium, the anode block and the cylinder block 1 and / or the piston assembly 2 form a primary battery, the anode block is consumed as the anode, and the cylinder block 1 and / or the piston assembly 2 serves as the cathode to precipitate gas. In this way, the cylinder block 1 and / or the piston assembly 2 can be protected by consuming the anode block. The present invention is provided with an anode block on the cylinder block 1 and / or the piston assembly 2, so that the cylinder block 1 and / or the piston assembly 2 can be protected, and the cylinder block 1 or the piston assembly 2 can be prevented from being corroded by the emulsion or water, thereby improving the service life of the hydraulic cylinder.

[0048] In the above embodiment, as Figure 1As shown in the figure, the cylinder block 1 includes a cylinder barrel 11 having a first end and a second end disposed opposite to each other; a cylinder bottom 12 disposed at the first end of the cylinder barrel 11; a piston 21 disposed inside the cylinder barrel 11; and a piston rod 22, one end of which is located outside the cylinder barrel 11 and the other end of which is inserted into the cylinder barrel 11 from the second end of the cylinder barrel 11 and connected to the piston 21.

[0049] In this embodiment, the cylinder block 1 includes a cylinder barrel 11, a cylinder bottom 12, a piston 21, and a piston rod 22. The cylinder barrel 11 has a first end and a second end disposed opposite to each other. The cylinder barrel 11 includes a first liquid inlet 112 and a second liquid inlet 114. The movement of the piston 21 is achieved by the oil inlet through the first liquid inlet 112 or the second liquid inlet 114. The cylinder bottom 12 is disposed at the first end of the cylinder barrel 11. The piston 21 is disposed inside the cylinder barrel 11. One end of the piston rod 22 is located outside the cylinder barrel 11 and the other end of which is inserted into the cylinder barrel 11 from the second end of the cylinder barrel 11 and connected to the piston 21. Further, a piston rod earring 222 is disposed at one end of the piston 21 located outside the cylinder barrel 11. Further, a first seal 4 is disposed between the piston 21 and the piston rod 22, so as to achieve the seal between the piston 21 and the piston rod 22. Further, a fourth seal 9 is further included between the piston 21 and the cylinder barrel 11, so as to achieve the seal between the piston 21 and the cylinder barrel 11 and prevent the hydraulic medium from flowing in the rod chamber and the non-rod chamber, resulting in the inability to achieve the hydraulic function. Further, the piston 21 divides the cavity of the cylinder barrel 11 into a rod chamber and a non-rod chamber, and the cavity adjacent to the cylinder bottom 12 is the rod chamber.

[0050] In the above embodiment, as Figure 1 shown, a first anode block 31 is disposed on the inner surface of the cylinder bottom 12.

[0051] In this embodiment, a first anode block 31 is disposed on the inner surface of the cylinder bottom 12. Thus, when the cylinder block 1 is filled with a hydraulic medium, the first anode block 31 and the inner surface of the cylinder bottom 12 form a primary battery, which can protect the cylinder bottom 12.

[0052] In the above embodiment, as Figure 4 shown, a second anode block 32 is disposed on the piston rod 22.

[0053] In this embodiment, a second anode block 32 is disposed on the piston rod 22. Thus, when the cylinder block 1 is filled with a hydraulic medium, the second anode block 32 and the piston rod 22 form a primary battery, which can protect the piston rod 22.

[0054] In the above embodiment, as Figure 3 shown, a third anode block 33 is disposed on the piston 21.

[0055] In this embodiment, a third anode block 33 is provided on the piston 21. In this way, when the cylinder block 1 is filled with a hydraulic medium, the third anode block 33 and the piston 21 form a primary battery, which can protect the piston 21.

[0056] In the above embodiment, as Figure 3 and Figure 4 shown, one end of the piston rod 22 connected to the piston 21 penetrates through the piston 21 and extends towards the bottom 12 of the cylinder. A second anode block 32 is provided on the part of the piston rod 22 between the piston 21 and the bottom 12 of the cylinder; or, a second anode block 32 is provided on the part of the piston rod 22 between the piston 21 and the second end of the cylinder barrel 11; a third anode block 33 is provided at one end of the piston 21 away from the bottom 12 of the cylinder.

[0057] In this embodiment, one end of the piston rod 22 connected to the piston 21 penetrates through the piston 21 and extends towards the bottom 12 of the cylinder. The second anode block 32 can be provided on the part of the piston rod 22 between the piston 21 and the bottom 12 of the cylinder, and of course, it can also be provided on the part of the piston rod 22 between the piston 21 and the second end of the cylinder barrel 11. Further, the second anode block 32 can be provided on both the part of the piston rod 22 between the piston 21 and the bottom 12 of the cylinder and the part of the piston rod 22 between the piston 21 and the second end of the cylinder barrel 11, so as to ensure that all parts in the whole cavity can be protected. Further, since the corrosion at the bottom of the piston rod 22 is relatively common, the second anode block 32 can be provided at one end of the piston rod 22 close to the bottom 12 of the cylinder; further, a third anode block 33 is provided at one end of the piston 21 away from the bottom 12 of the cylinder, and of course, a third anode block 33 can also be provided at one end of the piston 21 close to the bottom 12 of the cylinder, so as to protect the piston 21 through the third anode block 33.

[0058] In the above embodiment, the hydraulic cylinder further includes an elastic conductive member. One end of the elastic conductive member is connected to the first anode block 31, and the other end is connected to the second anode block 32.

[0059] In this embodiment, the hydraulic cylinder further includes an elastic conductive member. One end of the elastic conductive member is connected to the first anode block 31, and the other end is connected to the second anode block 32. In this way, during the movement of the piston 21, the elastic conductive member can undergo elastic deformation. At the same time, since the two ends of the elastic conductive member are respectively connected to the first anode block 31 and the second anode block 32, it is equivalent to connecting the first anode block 31 and the second anode block 32 in series. During the consumption of the anode, the first anode block 31 and the second anode block 32 can be consumed simultaneously, solving the problem that the first anode block 31 is consumed too quickly and is not easy to replace. It can be understood that the first anode block 31 is arranged at one end of the cylinder bottom 12, while the second anode block 32 is arranged on the piston rod 22. When replacing the anode block 3, the piston rod 22 is very easy to disassemble, but the anode block 3 at the cylinder bottom 12 is not easy to replace. If an elastic conductive member is not provided between the first anode block 31 and the second anode block 32, then the first anode block 31 is easily consumed, resulting in the problem that the first anode block 31 is difficult to replace.

[0060] In the above embodiment, as Figure 1 and Figure 2 shown, the piston assembly 2 further includes a guide sleeve 23, which is fixedly arranged at the second end of the cylinder barrel 11. One end of the piston rod 22 connected to the piston 21 is inserted into the cylinder barrel 11 through the guide sleeve 23, and a fourth anode block 34 is arranged at one end of the guide sleeve 23 close to the cylinder bottom 12.

[0061] In this embodiment, the piston assembly 2 further includes a guide sleeve 23, which is fixedly arranged at the second end of the cylinder barrel 11. One end of the piston rod 22 connected to the piston 21 is inserted into the cylinder barrel 11 through the guide sleeve 23, so that the piston rod 22 can be guided through the guide sleeve 23. Further, a fourth anode block 34 is arranged at one end of the guide sleeve 23 close to the cylinder bottom 12, so that the guide sleeve 23 and the inner wall of the cylinder barrel 11 can be protected by the fourth anode block 34. Further, an O-ring 5 is further included between the guide sleeve 23 and the cylinder barrel 11, so that the seal between the guide sleeve 23 and the cylinder barrel 11 can be realized, and the hydraulic medium is prevented from flowing out of the cavity. Further, a dust-proof ring 6 is further included between the guide sleeve 23 and the cylinder barrel 11, so that external dust is prevented from flowing into the cavity. Further, a second seal 7 is further included between the guide sleeve 23 and the piston rod 22, so that the seal between the guide sleeve 23 and the piston rod 22 can be realized, and the hydraulic medium is prevented from flowing out of the cavity. Further, a third seal 8 is further included between the guide sleeve 23 and the cylinder barrel 11, so that the seal between the guide sleeve 23 and the cylinder barrel 11 can be realized, and the hydraulic medium is prevented from flowing out of the cavity.

[0062] In the above embodiment, the outer surface of the anode block 3 is provided with an external thread, and a threaded hole is provided on the cylinder body 1 and / or the piston assembly 2. The anode block 3 can be screwed into the threaded hole through the external thread.

[0063] In this embodiment, the outer surface of the anode block 3 is provided with external threads, and the cylinder block 1 and / or the piston assembly 2 are provided with threaded holes. The anode block 3 can be screwed into the threaded holes through the external threads. By providing external threads on the outer surface of the anode block 3 and then inserting it into the threaded holes of the cylinder block 1 and / or the piston assembly 2, the anode block 3 is connected to the cylinder block 1 and / or the piston assembly 2, thus eliminating the need for other fixing structures and improving the assembly efficiency of the anode block 3 and the cylinder block 1 and / or the piston assembly 2. Of course, the anode block 3 and the cylinder block 1 and / or the piston assembly 2 can also be connected by bolts as needed. When connecting by bolts, sealant is applied above the installed bolts to prevent the bolts from falling off.

[0064] In the above embodiment, the anode block 3 and the cylinder block 1 are of an integral structure, and the anode block 3 and the piston assembly 2 are of an integral structure.

[0065] In this embodiment, the anode block 3 and the cylinder block 1 are of an integral structure, and the anode block 3 and the piston assembly 2 are of an integral structure. For example, the anode block 3 can be connected to the cylinder block 1 and / or the piston assembly 2 by means of secondary casting. Of course, the anode block 3 can also be plated on the cylinder block 1 and / or the piston assembly 2 by hot dip plating or electroplating to prevent the anode block 3 from falling off.

[0066] In the above embodiment, the temperature of the hydraulic medium filled in the cylinder block 1 is less than or equal to 55 °C, the pH value of the hydraulic medium is 4.5 to 10.5, and the conductivity of the hydraulic medium is greater than or equal to 1.5 ms / cm.

[0067] In this embodiment, in order to ensure the effectiveness of the anode and effectively protect the cylinder block 1 and the piston assembly 2, the temperature of the hydraulic medium filled in the cylinder block 1 is less than or equal to 22 °C, the pH value of the hydraulic medium is 4.5 to 10.5, and the conductivity of the hydraulic medium is greater than or equal to 1.5 ms / cm, which can prevent passivation or severe consumption on the surface of the anode block 3.

[0068] In the above embodiment, the anode block 3 includes zinc alloy, aluminum alloy or magnesium alloy.

[0069] In this embodiment, the anode block 3 includes zinc alloy, such as Zn-Al-Cd. Of course, aluminum alloy or magnesium alloy can also be used according to requirements.

[0070] The hydraulic support provided by the second aspect embodiment of the present invention includes the hydraulic cylinder provided by any one of the technical solutions of the first aspect embodiment of the present application. Since the hydraulic support provided by the second aspect embodiment of the present invention includes the hydraulic cylinder provided by any one of the technical solutions of the first aspect embodiment of the present application, therefore, the hydraulic support provided by the second aspect embodiment of the present invention has all the beneficial effects of the hydraulic cylinder provided by any one of the technical solutions of the first aspect embodiment of the present application, which will not be elaborated here.

[0071] The third aspect of the present invention provides an engineering device, including a hydraulic cylinder provided by any of the technical solutions in the first aspect of the present application. The engineering device mainly includes underground operation devices such as hydraulic supports and shearers, and can also be used in operating vehicles such as heavy trucks, trailers, excavators, roadheader loaders, bulldozers, rollers and concrete pump trucks, or mechanical operation devices such as tower cranes, construction hoists and material hoists.

[0072] The engineering device provided by the third aspect of the present invention includes the hydraulic cylinder provided by any of the technical solutions in the first aspect of the present application. Therefore, the engineering device provided by the third aspect of the present invention has all the beneficial effects of the hydraulic cylinder provided by any of the technical solutions in the first aspect of the present application, which will not be elaborated herein.

[0073] In the embodiments according to the present invention, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "plurality" means two or more, unless otherwise clearly defined. Terms such as "mounted", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments according to the present invention can be understood according to specific circumstances.

[0074] In addition, although the operations are depicted in a particular order, this should be understood as requiring such operations to be performed in the particular order shown or in sequential order, or requiring all illustrated operations to be performed to achieve the desired result. In certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although a number of specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the present invention. Certain features described in the context of separate embodiments may also be implemented in combination in a single implementation. Conversely, the various features described in the context of a single implementation may also be implemented separately or in any suitable sub-combination in multiple implementations.

[0075] Although the subject matter has been described in language specific to structural features and / or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. On the contrary, the specific features and acts described above are merely example forms for implementing the claims.

[0076] The above are only preferred embodiments of the embodiments according to the present invention, and are not used to limit the embodiments according to the present invention. For those skilled in the art, various changes and modifications can be made to the embodiments according to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments according to the present invention shall be included within the protection scope of the embodiments according to the present invention.

Claims

1. A hydraulic cylinder, characterized in that, Comprising: Cylinder block; Piston assembly, movably arranged inside the cylinder block; Anode block, the anode block is arranged on the cylinder block and / or the piston assembly. When the cylinder block is filled with hydraulic working medium, the anode block and the cylinder block and / or the piston assembly form a primary battery, the anode block is consumed as the anode, and the cylinder block and / or the piston assembly are used as the cathode to precipitate gas and avoid corrosion; The cylinder block includes: Cylinder barrel, including a first end and a second end arranged oppositely; Cylinder bottom, arranged at the first end of the cylinder barrel; The piston assembly includes: Piston, arranged inside the cylinder barrel; Piston rod, one end is located outside the cylinder barrel, and the other end is inserted into the cylinder barrel from the second end of the cylinder barrel and connected to the piston; A first anode block is arranged on the inner surface of the cylinder bottom; and / or A second anode block is arranged at the bottom of the piston rod; and / or A third anode block is arranged on the piston; The end of the piston rod connected to the piston penetrates through the piston and extends towards the cylinder bottom, and the second anode block is arranged on the part of the piston rod between the piston and the cylinder bottom; or, the second anode block is arranged on the part of the piston rod between the piston and the second end of the cylinder barrel; The third anode block is arranged at the end of the piston away from the cylinder bottom; The piston assembly further includes: Guide sleeve, fixedly arranged at the second end of the cylinder barrel, the end of the piston rod connected to the piston is inserted into the cylinder barrel from the guide sleeve, and a fourth anode block is arranged at the end of the guide sleeve close to the cylinder bottom; An O-ring is further included between the guide sleeve and the cylinder barrel, a dust-proof ring is further included between the guide sleeve and the cylinder barrel, a second seal is further included between the guide sleeve and the piston rod, and a third seal is further included between the guide sleeve and the cylinder barrel.

2. The hydraulic cylinder according to claim 1, wherein Further comprising: Elastic conductive member, one end of the elastic conductive member is connected to the first anode block, and the other end is connected to the second anode block.

3. The hydraulic cylinder according to claim 1 or 2, wherein The outer surface of the anode block is provided with an external thread or a screw hole, the cylinder block and / or the piston assembly are provided with a screw hole or a thread, and the anode block is screwed to the cylinder block and / or the piston assembly.

4. The hydraulic cylinder according to claim 1 or 2, wherein The anode block and the cylinder block are of an integral structure; or The anode block and the piston assembly are of an integral structure.

5. The hydraulic cylinder according to claim 1 or 2, wherein The temperature of the hydraulic medium filled in the cylinder block is less than or equal to 55 °C, the pH value of the hydraulic medium is 4.5 to 10.5, and the conductivity of the hydraulic medium is greater than or equal to 1.5 ms / cm.

6. The hydraulic cylinder according to claim 1 or 2, wherein The anode block includes zinc alloy, aluminum alloy or magnesium alloy.

7. A hydraulic support, characterized in that, Comprising: The hydraulic cylinder according to any one of claims 1 to 6.

8. An engineering device, characterized in that, Comprising: The hydraulic cylinder according to any one of claims 1 to 6, or including the hydraulic support according to claim 7.

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