KR102004198B1 - Hydraulic valve and hydraulic percussion deivice - Google Patents

Abstract

The present invention is an invention for a hydraulic valve composed of a valve sleeve and a valve spool, and an invention for a hydraulic hammer using the hydraulic valve.
Specifically, the hydraulic valve 10 has an open cylindrical shape at both ends, and includes a valve spool 100 having a first through hole 110 in a cylindrical vertical direction; accommodating the valve spool, and a second through hole in a cylindrical vertical direction. 211) and a valve sleeve 200 having a third through hole 212 formed therein.

Description

Hydraulic valve and hydraulic percussion deivice

The present invention is an invention for a hydraulic valve composed of a valve sleeve and a valve spool, and an invention for a hydraulic hammer using the hydraulic valve.

The patent inventions 001 to 004 are the background technology of the present invention, and present the disclosed prior inventions. The present invention proposes an advanced technology over the background technology. The patent inventions 001 to 004 are techniques disclosed in the patent literature of the prior art document.

Patent invention 001 relates to a hydraulic control valve device for controlling the operation of the hydraulic breaker, the annular valve control chamber is formed on the circumferential surface of the valve spring having three flow contact surfaces (F) having different outer diameters, the inside of the valve spring A valve control passage is formed in communication with the cylindrical space formed in the valve, and is positioned below the water pressure surface formed in the valve spout so that the valve control chamber is in communication with the valve switching passage when the valve spout is raised. This has the purpose of speeding up and down conversion of the piston.

Patent Invention 002 relates to a hydraulic control valve for a breaker that prevents shock breakage occurring when the sleeve contacts in the process of moving the spool to change the direction of the fluid. Looking at the structure, the valve chamber is formed in the breaker cylinder, a sleeve having a plurality of discharge holes, is installed in the sleeve, the inlet plug for the fluid flow, the operating space provided between the sleeve and the plug, It includes a spool movably installed in the operating space and the connection hole for connecting the inlet and the discharge hole is formed. A buffer space for filling the fluid is formed at one end of the working space to prevent contact with the sleeve during movement of the spool.

Patent invention 003 relates to a hydraulic breaker control valve, it characterized in that it further comprises a plurality of through-holes arranged radially at equal intervals around the central through-hole provided in the center portion of the spool inner jaw constituting the valve. According to the control valve of the hydraulic breaker of the present invention configured as described above, by minimizing the 'vortex phenomenon' according to the prior art generated in the front and rear of the through hole in the center, by reducing the pressure loss inside the control valve, It suggests an effect that can eliminate vibration generated during operation.

Patent invention 004 relates to a control valve of a hydraulic breaker that can improve the work efficiency by increasing the efficiency of the control valve for controlling the reciprocating motion of the piston. Specifically, the control valve for the hydraulic breaker is mounted on one side of the cylinder in which the piston striking the chisel is slidably, and the control valve switches the front and rear sliding directions of the piston. The control valve is installed on one side of the cylinder and has a sliding hole therein. And a valve housing formed to extend in the front and rear directions. A valve body slidably installed back and forth along a sliding hole in the valve housing, a spool body installed at a rear end of the valve housing, a valve spool slidably installed back and forth on the spool body, and the valve housing Is coupled to the rear end of the housing cover for closing the interior of the valve housing.

KR 10-1997-0044028 A (published 26 July 1997) KR 10-2013-0118044 A (published 29 October 2013) KR 10-2014-0036384 A (published March 26, 2014) KR 10-1492238 B1 (Registered Feb 04, 2015)

The present invention is an invention for a hydraulic valve composed of a valve sleeve and a valve spool, and an invention for a hydraulic hammer using the hydraulic valve.

The present invention is an invention for a hydraulic valve, specifically, both ends of the cylindrical shape is open, the valve spool 100 formed with a first through-hole 110 in the circumferential direction; accommodates the valve spool therein, the other side A valve sleeve 200 having a closed cylindrical shape and having a second through hole 211 and a third through hole 212 formed in a circumferential direction; and formed on one side of the valve sleeve and having an annular protrusion 221 projecting inwardly It is formed on both sides of the valve spool, the groove 130 is made of a semi-circular cross-sectional shape, the groove is formed on both sides of the valve spool, formed in a cylindrical vertical direction, arranged at equal intervals, semi-circular It is formed in a cross-section, from the center of the valve spool to the groove portion, a plurality of grooves 120 formed; forms.

The present invention is an invention for a hydraulic hammer, and specifically, a cylindrical body 310; a piston 320 inserted into the body and reciprocating; contacting one end surface of the piston and partially protruding out of the body Work tool 330, wherein the piston is supplied with the hydraulic pressure passing through the first through hole and / or the second through hole of claim 1;

The present invention relates to a hydraulic hammer device, in the above-described hydraulic hammer device consisting of a body, a piston, a work tool, the hydraulic valve is located between the body and the piston, the valve spool is the inner periphery of the valve sleeve and It includes; located on the outer periphery of the piston.

The present invention is an invention for a hydraulic striker, the hydraulic striker consisting of the body, a piston, a work tool as described above, the valve sleeve and the valve spool is formed in the body, and spaced apart from the piston; includes do.

Since both ends of the valve spool of the present invention form a plurality of grooves and grooves, the separation resistance generated at the time of contact and separation after the contact can be minimized, and rapid separation can be realized to effectively reciprocate the valve spool.

Since the valve spool of the present invention contains oil in the grooves and grooves, the valve spool has an effect of alleviating impact upon contact.

Since the valve spool of the present invention has a cylindrical shape, it may be coupled between the piston and the body of the hydraulic hammer, which has the effect of minimizing the space of the hydraulic hammer.

1 is a perspective view of a combination of the valve spool and valve sleeve constituting the hydraulic valve of the present invention.
Figure 2 is a perspective view of the valve spool of the present invention.
Figure 3 is a combination of the hydraulic valve and the hydraulic hammer of the present invention.
Figure 4 is a variety of contact surface (F) shape of the present invention.

Hereinafter, the most preferred embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. Citation numbers presented in this embodiment are not limited to the presented citation numbers, and may be applied to all applicable embodiments. Even if the configuration is not the same as described in the present embodiment, subjects that have the same problem solving principle, replaceable or easily replaceable are equivalent to the range. Sub-concepts of the objects presented in this embodiment are assumed to be self-explanatory even if not directly described.

[Example 1-1] The present invention is an invention for a hydraulic valve (10), specifically, the valve spool (100) having a cylindrical shape with both ends open, the first through-hole 110 in the circumferential direction; A valve sleeve 200 accommodating the valve spool therein and having a cylindrical shape with the other side closed, and having a second through hole 211 and a third through hole 212 formed in a circumferential direction; and formed on one side of the valve sleeve And an annular protrusion 221 protruding inwardly, formed on both end surfaces of the valve spool, and having a semicircular cross-sectional shape, and having grooves 130 formed in grooves, and formed on both end surfaces of the valve spool, in a cylindrical vertical direction. It is formed, evenly spaced, is formed in a semi-circular cross-section, is formed from the center of the valve spool to the groove portion, a plurality of grooves formed 120; consisting of a configuration including (see Figs. 1 and 3).

The present invention relates to a hydraulic valve, which supplies hydraulic oil to equipment, such as a breaker. The hydraulic valve consists of a valve spool and a valve sleeve. The valve spool is seated inside the valve sleeve and reciprocates. Change the hydraulic supply direction according to the valve spool position. When the valve spool is moved to one side, the hydraulic valve inside is closed, and the hydraulic oil inside the hydraulic valve does not flow. Therefore, the hydraulic oil is not discharged, the hydraulic pressure supplied from the hydraulic source is supplied directly to one side of the piston. On the other hand, when the valve spool is moved to the other side, the hydraulic pressure supplied from the hydraulic source into the valve is supplied to the other side of the piston through the valve spool first through hole 110 and the second through hole 211 of the valve sleeve.

[Example 1-2] The present invention is an invention for a hydraulic valve, and in Example 1-1, an annular protrusion 221 formed on one side of the valve sleeve and protruding inwardly is included. )

In order to prevent separation of the valve spool reciprocating inside the valve sleeve, an annular protrusion 221 is formed on one inner circumferential surface of the valve sleeve. When the valve spool is moved to one side, the annular protrusion inner surface 221a and the valve spool 101a are in contact with each other. On the other hand, when the valve spool is moved to the other side, the inner surface of the annular projection and the valve spool one side is separated. However, the other side of the valve spool 101b is in contact with the valve sleeve inner surface 200b. As a result, both sides 101a and 101b of the valve spool repeat periodic contact.

[Example 1-3] The present invention is an invention for a hydraulic valve, and in Example 1-1, the valve spool is formed on both end surfaces, and is formed in a cylindrical vertical direction and includes a plurality of recesses 120 formed therein. . (See Figs. 2, 3 and 4)

The valve sleeve and valve spool are operated in an oil contact environment. Due to the high viscosity of the oil, objects in contact with the oil cause surface tension. In addition, oil is present between the objects having two flat surfaces, and when two planes contact, oil flows out of the plane, and the leaked oil is hermetically sealed by the surface tension at the plane boundary. In this case, the two planes are not easily separated. The cause is that the airtight boundary of the oil forms a negative pressure space between the plane and the plane, and the negative pressure in the negative pressure space prevents the separation of the two objects. This physical phenomenon occurs equally on both sides of the valve spool. Separation resistance due to negative pressure limits the rapid operation of the valve spool, which causes a decrease in valve efficiency. In particular, high separation resistance is generated at one side of the valve spool (101a) and the other side (101b). In order to reduce the separation resistance, the present invention forms a plurality of grooves on both sides of the valve. The groove separates the donut-shaped contact surface F into the groove, which reduces the contact plane, thereby reducing the separation resistance. Therefore, since the negative pressure of the contact surface becomes small, the valve spool can be easily separated from the annular protrusion 221.

[Example 1-4] The present invention relates to a hydraulic valve, and in Example 1-1, the cross section of the recess includes a polygon or a semicircle.

[Example 1-5] The present invention is an invention for a hydraulic valve, and in Example 1-1, the intervals of the grooves are arranged at equal intervals.

The groove cross-section forms a polygon or semicircle, which depends on the tool shape in the production process. The groove depth is made smaller or larger than the thickness of the valve spool. If the oil viscosity is high, select deep grooves. This is for oil to enter the groove. One side of the valve spool is donut-shaped, in order to reduce the donut-shaped cross-sectional area, a plurality of grooves are formed. The plurality of grooves are arranged at equal intervals, and are formed in the same size. This is to match the separation force of the valve spool in the axial direction.

[Example 1-6] The present invention is an invention for a hydraulic valve, and in Examples 1-1 or 1-3, grooves 130 formed on both end surfaces of the valve spool and made of grooves. (See Figures 2 and 4)

Example 1-7 The present invention relates to a hydraulic valve, and in Example 1-6, the groove cross section is formed in a polygon or a semicircle.

Both end faces of the valve spool have a donut shape, but in order to reduce the contact area of the donut shape, the groove is formed as an annular groove. The grooves contain oil and are intended to reduce the donut-shaped contact area formed on both sides of the valve spline. Therefore, the separation resistance generated in the separation process can be reduced. The groove cross-sectional shape and size is set according to the size and shape of the work tool.

Therefore, it can take the form of various shapes. In addition, the size of the cross section can be set according to the oil content and the oil viscosity.

[Example 1-8] The present invention relates to a hydraulic valve, and in Example 1-1, the first through hole is formed in plural; the first formed on the outer circumference at which the first through hole is located. A flow path groove 111; (see FIG. 3).

The first through hole 110 penetrates through the side wall of the valve spool 100, and when the other side of the valve spool contacts the inner surface of the valve sleeve, the first through hole communicates with the second through hole 211 of the valve sleeve. . Therefore, the oil inside the valve spool is discharged to the outside through the first through hole and the second through hole. In order to improve the discharge efficiency, the first flow path groove 111 is formed as a groove on the outer periphery of the valve spool 100. A plurality of first through holes communicate with the groove, and the first through holes are arranged at uniform intervals.

[Example 1-9] The present invention relates to a hydraulic valve, and in Example 1-1, a second flow path groove formed at an outer circumference of the valve spool and communicating the second through hole and the third through hole ( 112) (see Figure 3).

The first through hole is closed when the valve spool one side 101a is in contact with the annular protrusion 221. On the other hand, the two second through holes 211 and the third through holes 212 formed in the valve sleeve 200 are communicated by the second flow path groove 112. That is, the second flow path 112 is formed in the outer circumference of the valve spool to allow the flow of the second through hole and the second through hole.

 [Example 2-1] The present invention is an invention for a hydraulic hammer, and specifically, a cylindrical body 310; a piston 320 inserted into the body and reciprocating; contacting one end surface of the piston And a work tool 330 partially protruding out of the body; wherein the piston is supplied with hydraulic pressure passing through the first through hole and / or the second through hole of Example 1-1. Reference)

The present invention relates to a hydraulic strike device, a work tool for imparting an impact load to the striking object is drawn out of the body. The work tool is in contact with the piston inside the body is hit. The piston is hit by hydraulic pressure flowing from the hydraulic valve (first through hole and / or second through hole). The hydraulic pressure supplied to the piston is supplied with the hydraulic pressure of the hydraulic valve 10 shown in the first embodiment. The hydraulic pressure supplied from the hydraulic valve repeatedly changes the direction of entry of the hydraulic pressure.

[Example 3-1] The present invention is an invention for a hydraulic strike device, and in Example 3-1, the hydraulic valve is located between the body and the piston, and the valve spool is the valve sleeve and the piston outer circumference. Located in; includes.

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[Example 4-1] The present invention is an invention for a hydraulic strike device, and in Example 3-1, the valve sleeve and the valve spool are formed inside the body and are spaced apart from the piston. Hydraulic strike device.

Embodiments 3-1 and 4-1 are inventions in which the positions of the hydraulic valves are limited. In Example 3-1, the hydraulic valve is located between the body and the piston, and in Example 4-1, the hydraulic valve is not in contact with the piston and is located in the body. When the hydraulic valve is located in the body and the piston, it has the effect that the hydraulic valve can be mounted in a narrow space. On the other hand, when the hydraulic valve is spaced apart from the piston, it has an effect that can prevent the friction of the valve spool.

10: hydraulic valve 100: valve spool
101a: Valve sleeve one side 101b: Valve sleeve other side
110: first through hole 111: the first euro groove
112: second euro groove (112) 120: groove (120)
130: groove (130) 200: valve sleeve
200b: valve sleeve inner surface 211: second through hole
212: third through hole 221: annular projection
221a: inner surface of the annular protrusion 310: body
320: piston 330: working tool
F: contact surface

Claims (4)

In the hydraulic valve 10,
A valve spool 100 having a cylindrical shape having both end surfaces opened and having a first through hole 110 in a circumferential direction;
A valve sleeve 200 accommodating the valve spool therein and having a cylindrical shape with the other side closed, and having a second through hole 211 and a third through hole 212 formed in the circumferential direction;
An annular protrusion 221 formed on one side of the valve sleeve and protruding inward;
Grooves 130 formed on both end surfaces of the valve spool and having a semicircular cross-section and formed with grooves;
It is formed on both sides of the valve spool, formed in a cylindrical vertical direction, evenly spaced, formed in a semi-circular cross section, formed from the center of the valve spool to the groove portion, a plurality of grooves formed; Hydraulic valve
In the hydraulic strike device,
Hydraulic valve 10 of claim 1,
Cylindrical body 310 ;,
A piston 320 inserted into the body and reciprocating;
A work tool 330 contacting one end surface of the piston and partially protruding out of the body;
Hydraulic piston device is supplied to the hydraulic pressure passing through the first through hole and the second through hole of the hydraulic valve;

The method according to claim 2,
The hydraulic valve is located between the body and the piston, the valve spool is located on the inner periphery of the valve sleeve and the piston outer periphery.

The method according to claim 3,
And the valve sleeve and the valve spool are formed in the body and spaced apart from the piston.

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