Hydraulic lock

Abstract

The utility model discloses a hydraulic lock which comprises a valve body, a piston and a valve element. The upper side and the lower side of the valve body are each provided with two sets of oil ports. Expanded diameters are arranged at one ends of the inner sides of the two groups of oil ports on the upper side; a through mounting channel is formed in the valve body, a piston is arranged in the center of the mounting channel, and ejector rods are symmetrically arranged on the two sides of the piston. Valve elements are symmetrically arranged in the mounting channel on the two sides of the piston; the valve element is of a barrel structure with an opening in one end, and a reset spring is arranged in the valve element and pressed tightly through a sealing cover. An L-shaped channel is formed in the top of the valve element, one end opening of the L-shaped channel is located in the side wall of the valve element, and the other end opening is located in the top end face of the valve element. Sealing rings are arranged on the two sides of a port located on the side wall of the valve element. The sealing device is novel in structure and high in sealing performance, the spring is not immersed in hydraulic oil, and later maintenance is convenient.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic valves, in particular to a hydraulic lock. Background Art

[0002] The hydraulic lock is composed of two identical hydraulically controlled one-way valves with a piston in the middle. When there is no pressure in one pipeline, the other one will close at the same time, thus ensuring the stability and safety of the hydraulic system.

[0003] The valve core and valve body of the traditional hydraulic lock adopt a wedge-shaped structure, which makes it easy for hydraulic oil to leak during actual use. At the same time, the middle spring of the traditional structure is completely placed in the hydraulic oil, which is inconvenient to clean during later maintenance and prolongs the replacement time. Utility Model Content

[0004] The utility model aims to provide a hydraulic lock with good sealing performance and easy maintenance.

[0005] The purpose of the utility model is achieved as follows: a hydraulic lock, comprising a valve body, a piston, and a valve core; two groups of oil ports are provided on the upper and lower sides of the valve body; an enlarged diameter is provided at one end of the inner sides of the two groups of oil ports on the upper side; a penetrating installation channel is provided in the valve body, a piston is provided at the center of the installation channel, and push rods are symmetrically provided on both sides of the piston; valve cores are symmetrically provided in the installation channels on both sides of the piston; the valve core is a cylindrical structure with an open end, a return spring is provided inside the valve core, and the return spring is pressed by a sealing cover; an L-shaped channel is provided on the top of the valve core, one end port of the L-shaped channel is located on the side wall of the valve core, and the other end port is located on the top end surface of the valve core; sealing rings are provided on both sides of the port located on the side wall of the valve core.

[0006] Preferably, a guide column is provided at the center of the sealing cover, and the return spring is placed on the periphery of the guide column; a dust ring is provided between the outer vertical surface of the sealing cover and the valve body.

[0007] Preferably, five groups of fixing grooves are provided on the outer vertical surface of the piston, and an O-ring is installed in the middle fixing groove of the five groups of fixing grooves; left-finger rubber rings are installed in the fixing grooves on both sides of the O-ring, and right-finger rubber rings are installed in the two groups of fixing grooves on the outer side.

[0008] Preferably, the left-finger-shaped rubber ring and the right-finger-shaped rubber ring are both composed of a fixing portion and a resisting portion, and the resisting portion and the fixing portion are integrally connected at an angle of 30°.

[0009] Preferably, the sealing ring is a convex structure consisting of an embedded portion and a raised portion, the embedded portion of the sealing ring is embedded in the groove of the valve core side wall and fixed, and arc chamfers are provided on both sides of the raised portion.

[0010] Preferably, when the return spring returns to its maximum stroke, the port on the side wall of the valve core is located at the installation channel inside the expanded diameter, and when the return spring is compressed to its minimum stroke, the port on the side wall of the valve core is directly opposite to the expanded diameter.

[0011] Preferably, a step seal and a dust ring are provided between the outer vertical surface of the valve core opening and the inner diameter surface of the installation channel.

[0012] Preferably, the two groups of oil ports located on the lower side of the valve body are connected to the cavity between the piston and the valve core.

[0013] Compared with the prior art, the present invention is beneficial in that:

[0014] 1. The valve core is optimized and modified, and the oil circuit channel is placed inside the valve core. The spring body is placed in the inner cavity of the valve core. Compared with the traditional structure, this avoids the spring body being immersed in hydraulic oil, making it cleaner when maintaining and replacing the spring;

[0015] 2. Place the valve core channel outside the valve core. When the valve core is in the middle position, even if the return spring fails or the spring is replaced, the valve core will not move due to pressure changes, ensuring normal pressure at the two groups of oil ports on the road and avoiding pressure relief.

[0016] 3. The outer sealing ring of the piston is optimized and multiple sets of finger-shaped rubber rings in different directions are installed, which greatly improves the sealing of the piston and avoids leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the present utility model.

[0018] Figure 2 This is a schematic structural diagram of the left-handed rubber ring and the right-handed rubber ring of the present invention.

[0019] Figure 3 This is a structural diagram of the sealing ring of the utility model.

[0020] Among them, 1 valve body, 101 installation channel, 2 piston, 201 push rod, 202 fixing groove, 3 valve core, 301 L-type channel, 4 oil port, 401 expansion diameter, 5 return spring, 6 sealing cover, 601 guide column, 7 sealing ring, 701 embedded part, 702 raised part, 8 dust ring, 9 O-ring, 10 left-finger type rubber ring, 11 right-finger type rubber ring, 12 step seal. DETAILED DESCRIPTION

[0021] 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.

[0022] 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.

[0023] 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.

[0024] like Figure 1-3 As shown, a hydraulic lock includes a valve body 1, a piston 2, and a valve core 3; two groups of oil ports 4 are provided on the upper and lower sides of the valve body 1; an enlarged diameter 401 is provided on one end of the inner side of the two groups of oil ports 4 on the upper side; a penetrating installation channel 101 is provided in the valve body 1, a piston 2 is provided at the center of the installation channel 101, and push rods 201 are symmetrically provided on both sides of the piston 2; valve cores 3 are symmetrically provided in the installation channels 101 on both sides of the piston 2; the valve core 3 is a cylindrical structure with an open end, and a return spring 5 is provided inside the valve core 3, and the return spring 5 is pressed by a sealing cover 6; an L-shaped channel 301 is provided on the top of the valve core 3, and one end port of the L-shaped channel 301 is located on the side wall of the valve core 3, and the other end port is located on the top end surface of the valve core 3; sealing rings 7 are provided on both sides of the port located on the side wall of the valve core 3.

[0025] like Figure 1 As shown, a guide column 601 is provided at the center of the sealing cover 6, and the return spring 5 is placed on the periphery of the guide column 601. The guide column can prevent the spring from bending and ensure the axial operation of the spring; a dust ring 8 is provided between the outer vertical surface of the sealing cover 6 and the valve body 1 to prevent external dust from entering the interior.

[0026] like Figure 1As shown, five groups of fixing grooves 202 are provided on the outer vertical surface of the piston 2, and an O-ring 9 is installed in the middle fixing groove of the five groups of fixing grooves 202; left finger-shaped rubber rings 10 are installed in the fixing grooves 202 on both sides of the O-ring 9, and right finger-shaped rubber rings 11 are installed in the two groups of fixing grooves 202 on the outer side. By installing multiple groups of finger-shaped rubber rings in different directions, the sealing performance of the piston is greatly improved. Regardless of left and right lateral movement, the finger-shaped rubber rings in different directions can form a conflict with the inner wall of the valve body, thereby avoiding leakage.

[0027] like Figure 2 As shown, the left finger-shaped rubber ring 10 and the right finger-shaped rubber ring 11 are both composed of a fixed part and a contact part, which are integrally connected to the fixed part at an angle of 30°. The contact part has a certain elasticity and can achieve automatic compensation to provide sealing.

[0028] like Figure 3 As shown, the sealing ring 7 is a convex structure composed of an embedded part 701 and a raised part 702. The embedded part 701 of the sealing ring 7 is embedded in the groove of the side wall of the valve core 3 and fixed. The raised part 702 is provided with arc chamfers on both sides. When moving horizontally to the left and right, the chamfers are convenient for contacting with the expanded diameter to avoid damage to the sealing ring.

[0029] like Figure 1 As shown, when the return spring 5 returns to the maximum stroke, the port on the side wall of the valve core is located at the installation channel inside the expanded diameter. When the return spring 5 is compressed to the minimum stroke, the port on the side wall of the valve core is directly opposite to the expanded diameter. When the valve core moves laterally to both sides after being subjected to pressure, the oil circuit can be connected. After the pressure is lost, the return spring pushes the valve core out to maintain the pressure of the oil circuit.

[0030] like Figure 1 As shown, a step seal 12 and a dust ring 8 are provided between the outer facade of the opening of the valve core 3 and the inner diameter surface of the installation channel to prevent the internal hydraulic oil from leaking into the inner cavity of the valve core. The spring body will not be immersed in the hydraulic oil, which facilitates the later maintenance of the spring.

[0031] like Figure 1 As shown, the two groups of oil ports 4 located on the lower side of the valve body 1 are connected to the cavity between the piston 2 and the valve core 3, and the lower oil port is connected to the upper oil port through an L-shaped channel.

[0032] The working principle of the utility model is explained as follows: when in use, oil enters the oil port on the lower left side, the left valve core and the piston move laterally to both sides under pressure, and the piston right side push rod pushes outward, that is, oil enters the oil port on the lower left side and oil returns to the oil port on the lower right side; after the pressure is lost, the piston is in the middle position and the valve core returns to its position, that is, pressure maintenance is achieved in the two oil ports on the upper side.

[0033] 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. A hydraulic lock, characterized in that: It includes a valve body, a piston and a valve core; two groups of oil ports are provided on the upper and lower sides of the valve body; an enlarged diameter is provided on one end of the inner side of the two groups of oil ports on the upper side; a penetrating installation channel is provided in the valve body, a piston is provided at the center of the installation channel, and push rods are symmetrically provided on both sides of the piston; valve cores are symmetrically provided in the installation channels on both sides of the piston; the valve core is a cylindrical structure with an open end, a return spring is provided inside the valve core, and the return spring is pressed by a sealing cover; an L-shaped channel is provided on the top of the valve core, one end port of the L-shaped channel is located on the side wall of the valve core, and the other end port is located on the top end face of the valve core; sealing rings are provided on both sides of the port located on the side wall of the valve core.

2. A hydraulic lock according to claim 1, characterized in that: A guide column is provided at the center of the sealing cover, and the return spring is placed on the periphery of the guide column; a dust ring is provided between the outer vertical surface of the sealing cover and the valve body.

3. A hydraulic lock according to claim 1, characterized in that: Five groups of fixing grooves are provided on the outer vertical surface of the piston, and an O-ring is installed in the middle fixing groove of the five groups of fixing grooves; left-finger rubber rings are installed in the fixing grooves on both sides of the O-ring, and right-finger rubber rings are installed in the two groups of fixing grooves on the outer side.

4. A hydraulic lock according to claim 3, characterized in that: The left-finger-shaped rubber ring and the right-finger-shaped rubber ring are both composed of a fixing portion and a contact portion, and the contact portion and the fixing portion are integrally connected at an angle of 30 degrees.

5. The hydraulic lock according to claim 1, characterized in that: The sealing ring is a convex structure composed of an embedded part and a raised part. The embedded part of the sealing ring is embedded in the groove of the valve core side wall and fixed, and arc chamfers are provided on both sides of the raised part.

6. A hydraulic lock according to claim 1, characterized in that: When the return spring returns to its maximum stroke, the port on the side wall of the valve core is located at the installation channel inside the expanded diameter. When the return spring is compressed to its minimum stroke, the port on the side wall of the valve core is directly opposite to the expanded diameter.

7. The hydraulic lock according to claim 1, characterized in that: A step seal and a dust ring are provided between the outer vertical surface of the valve core opening and the inner diameter surface of the installation channel.

8. The hydraulic lock according to claim 1, characterized in that: Two groups of oil ports located on the lower side of the valve body are connected to the cavity between the piston and the valve core.

Images