Hydraulic lock easy to maintain

Abstract

The utility model discloses a hydraulic lock easy to maintain. The hydraulic lock comprises a valve body, a valve element and a ceramic sleeve. The upper side and the lower side of the valve body are each provided with two sets of oil ports, extension pipes are arranged on the two sets of oil ports in the upper side, and manual control valves are arranged on the extension pipes. A through containing cavity is formed in the valve body, a piston is arranged in the middle of the containing cavity, valve elements are symmetrically arranged on the two sides of the piston, and spring sets are arranged in the valve elements and pressed and fixed through glands. A chamfer is arranged at the end of the inner side of the valve element to form a first abutting face. A chamfer is arranged at one end of the inner side of the joint of the runner and the containing cavity to form a second abutting face, and the first abutting face and the second abutting face form extrusion. Ceramic sleeves are arranged at openings in two ends of the accommodating cavity; the outer wall of the valve element is slidably matched with the inner wall of the ceramic sleeve. The oil port is novel in structure, the oil port can be independently controlled, follow-up maintenance and replacement are facilitated, meanwhile, the ceramic sleeve is resistant to abrasion, later maintenance is convenient, and use cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic valve manufacturing, in particular to an easy-to-maintain hydraulic lock. Background Art

[0002] Hydraulic locks are crucial components in hydraulic systems, securing the position of hydraulic cylinders and ensuring the stability and safety of the system. However, the valve core and valve body in existing hydraulic locks are often made of metal, which can easily wear out over time, leading to a decrease in sealing performance and even leaks. Leaks can go undetected, often delaying maintenance. Excessive wear of the valve body requires complete replacement, which is costly. Furthermore, replacing a worn valve core is difficult and requires draining the internal hydraulic oil, increasing maintenance costs and time. Utility Model Content

[0003] The utility model aims to provide an easy-to-maintain hydraulic lock. By introducing a sleeve made of a highly wear-resistant ceramic material to replace the traditional metal valve core and part of the valve body structure, the wear resistance and maintenance convenience of the hydraulic lock are improved.

[0004] The object of the utility model is achieved as follows: a hydraulic lock that is easy to maintain, comprising a valve body, a valve core, and a ceramic sleeve; two groups of oil ports are provided on the upper and lower sides of the valve body, and the two groups of oil ports on the upper side are provided with extension tubes, and a manual control valve is provided on the extension tube; a penetrating accommodating chamber is provided in the valve body, a piston is provided in the middle of the accommodating chamber, and valve cores are symmetrically provided on both sides of the piston, and a spring group is provided inside the valve core and is tightly fixed by a pressure cover; the inner end of the valve core is provided with a chamfer to form a first resistance surface; the two groups of oil ports on the upper side extend inwardly and are connected to the accommodating chamber through a flow channel, and one end inside the connection between the flow channel and the accommodating chamber is provided with a chamfer to form a second resistance surface, and the first resistance surface and the second resistance surface form extrusion; the inner diameter surfaces of the openings at both ends of the accommodating chamber are turned with a first fixed step and a second fixed step, and a ceramic sleeve is sleeved on the first fixed step and the second fixed step; the outer wall of the valve core slides with the inner wall of the ceramic sleeve.

[0005] Preferably, the ceramic sleeve is a T-shaped structure consisting of an inserting part and a fixing part, the end face of the inserting part is provided with an annular rubber gasket, the corners of the inserting part and the fixing part are provided with O-rings, and the outer facade of the fixing part is covered with a protective layer.

[0006] Preferably, both the first contact surface and the second contact surface are covered with a rack-shaped rubber ring, and the rack-shaped rubber rings on the first contact surface and the second contact surface are meshed with each other.

[0007] Preferably, the spring group consists of an inner coil spring and an outer coil spring.

[0008] Preferably, the gland is fixed to the valve body by bolts, an overflow hole is provided in the lower area of ​​the gland, and the overflow hole is connected to the oil pot.

[0009] Compared with the prior art, the present invention is beneficial in that:

[0010] 1. A ceramic sleeve is set on the side where the valve body contacts the valve core. When the hydraulic lock needs to replace the sleeve, the easy disassembly of the ceramic sleeve makes the maintenance process simpler and faster, which not only improves maintenance efficiency but also reduces maintenance costs.

[0011] 2. In order to ensure that oil leaks can be discovered and monitored in a timely manner, a specific oil circuit is set up to connect to the oil pot. When an oil leak occurs in the system, the leaked hydraulic oil will flow into this oil pot, providing an intuitive visual indication. The operator can replace the internal ceramic sleeve or valve core and other structures in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the present utility model.

[0013] Figure 2 for Figure 1 A magnified view of the structure in Figure 2.

[0014] Among them, 1 valve body, 101 accommodating chamber, 1011 first fixed step, 1012 second fixed step, 2 valve core, 201 first contact surface, 3 ceramic sleeve, 301 insertion part, 302 fixed part, 4 oil port, 5 extension pipe, 6 manual control valve, 7 piston, 8 spring group, 801 inner ring spring, 802 outer ring spring, 9 pressure cover, 901 overflow hole, 10 flow channel, 1001 second contact surface, 11 annular rubber gasket, 12 O-ring, 13 protective layer, 14 rack-shaped rubber ring, 15 oil pot. DETAILED DESCRIPTION

[0015] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0016] It should be noted that in the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the utility model product is usually placed when in use. These are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance. Terms such as "horizontal", "vertical", and "overhanging" do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0017] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, direct connections, indirect connections via an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0018] like Figure 1-2 As shown, a hydraulic lock that is easy to maintain includes a valve body 1, a valve core 2, and a ceramic sleeve 3; two groups of oil ports 4 are provided on the upper and lower sides of the valve body 1, and the two groups of oil ports 4 on the upper side are provided with extension pipes 5, and the extension pipes 5 are provided with a manual control valve 6; a through accommodating cavity 101 is provided in the valve body 1, a piston 7 is provided in the middle of the accommodating cavity 101, and valve cores 2 are symmetrically provided on both sides of the piston 7, a spring group 8 is provided inside the valve core 2, and is pressed and fixed by a pressure cover 9; the inner end of the valve core 2 is chamfered to form a first contact surface 201; the two groups of oil ports on the upper side are provided with extension pipes 5, and a manual control valve 6 is provided on the extension pipe 5; a through accommodating cavity 101 is provided in the valve body 1, and a piston 7 is provided in the middle of the accommodating cavity 101, and a valve core 2 is symmetrically provided on both sides of the piston 7, and a spring group 8 is provided inside the valve core 2 and is pressed and fixed by a pressure cover 9; the inner end of the valve core 2 is chamfered to form a first contact surface 201; The port 4 extends inward through the flow channel 10 and is connected to the accommodating chamber 101. A chamfer is provided at one inner end of the connection between the flow channel 10 and the accommodating chamber 101 to form a second contact surface 1001, and the first contact surface 201 and the second contact surface 1001 form an extrusion; the inner diameter surface at the openings at both ends of the accommodating chamber 101 is turned with a first fixed step 1011 and a second fixed step 1012, and a ceramic sleeve 3 is sleeved on the first fixed step 1011 and the second fixed step 101; the outer wall of the valve core 2 slides with the inner wall of the ceramic sleeve 3.

[0019] like Figure 1As shown, the ceramic sleeve 3 is a T-shaped structure consisting of an inserting part 301 and a fixing part 302. An annular rubber gasket 11 is provided on the end face of the inserting part 301, and O-rings 12 are provided at the corners of the inserting part 301 and the fixing part 302. The outer vertical surface of the fixing part 302 is covered with a protective layer 13. The annular rubber gasket and the O-ring are used to ensure the sealing between the ceramic sleeve and the valve body to avoid leakage of hydraulic oil; the protective layer is used to protect the ceramic sleeve to avoid direct contact with the pressure cover.

[0020] like Figure 2 As shown, the first contact surface 201 and the second contact surface 1001 are both covered with a rack-shaped rubber ring 14. The rack-shaped rubber rings 14 on the first contact surface 201 and the second contact surface 1001 engage with each other. By providing the rack-shaped rubber ring, multiple seals can be effectively formed at the contact surface, greatly improving the sealing performance.

[0021] like Figure 1 As shown, the spring group 8 is composed of an inner coil spring 801 and an outer coil spring 802. The double spring group can provide sufficient restoring force and also avoid the failure of a single spring group.

[0022] like Figure 1 As shown, the gland 9 is fixed to the valve body 1 by bolts. An overflow hole 901 is provided in the lower area of ​​the gland 9. The overflow hole 901 is connected to the oil pot 15. When oil leakage occurs in the system, the leaked hydraulic oil will flow into the oil pot, thereby providing an intuitive visual indication so that the operator can replace the internal ceramic sleeve or valve core and other structures in time.

[0023] The working principle of the present invention is described as follows: during installation, first insert the piston, and then install the ceramic sleeve and valve core; during later maintenance, first close the manual valve, then open the pressure cover, take out the ceramic sleeve, and replace it with a new sleeve.

[0024] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Any modifications and improvements to the technical solution of the present invention made by a person of ordinary skill in the art without departing from the design concept of the present invention shall fall within the scope of protection of the present invention. The technical content sought to be protected by the present invention is fully set forth in the claims.

Claims

1. An easy-to-maintain hydraulic lock, characterized in that: It includes a valve body, a valve core, and a ceramic sleeve; two groups of oil ports are provided on the upper and lower sides of the valve body, and the two groups of oil ports on the upper side are provided with extension tubes, and the extension tubes are provided with a manual control valve; a penetrating accommodating cavity is provided in the valve body, a piston is provided in the middle of the accommodating cavity, and valve cores are symmetrically provided on both sides of the piston, and a spring group is provided inside the valve core, and is tightly fixed by a pressure cover; a chamfer is provided at the inner end of the valve core to form a first resistance surface; the two groups of oil ports on the upper side extend inwardly to communicate with the accommodating cavity through a flow channel, and a chamfer is provided at one end on the inner side of the connection between the flow channel and the accommodating cavity to form a second resistance surface, and the first resistance surface and the second resistance surface form an extrusion; the inner diameter surface of the openings at both ends of the accommodating cavity is turned with a first fixed step and a second fixed step, and a ceramic sleeve is sleeved on the first fixed step and the second fixed step; the outer wall of the valve core and the inner wall of the ceramic sleeve are slidably matched.

2. The easy-to-maintain hydraulic lock according to claim 1, characterized in that: The ceramic sleeve is a T-shaped structure consisting of an inserting part and a fixing part. The end face of the inserting part is provided with an annular rubber gasket, the corners of the inserting part and the fixing part are provided with O-rings, and the outer facade of the fixing part is covered with a protective layer.

3. The easy-to-maintain hydraulic lock according to claim 1, characterized in that: The first contact surface and the second contact surface are both covered with a rack-shaped rubber ring, and the rack-shaped rubber rings on the first contact surface and the second contact surface are meshed with each other.

4. The easy-to-maintain hydraulic lock according to claim 1, characterized in that: The spring group consists of an inner coil spring and an outer coil spring.

5. The easy-to-maintain hydraulic lock according to claim 1, characterized in that: The gland is fixed to the valve body by bolts, and an overflow hole is provided in the lower area of ​​the gland, and the overflow hole is connected to the oil pot.

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