KR101498314B1 - The fitting assembly with valve stroke limiter function - Google Patents

The fitting assembly with valve stroke limiter function Download PDF

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Publication number
KR101498314B1
KR101498314B1 KR1020100129031A KR20100129031A KR101498314B1 KR 101498314 B1 KR101498314 B1 KR 101498314B1 KR 1020100129031 A KR1020100129031 A KR 1020100129031A KR 20100129031 A KR20100129031 A KR 20100129031A KR 101498314 B1 KR101498314 B1 KR 101498314B1
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KR
South Korea
Prior art keywords
spool
fitting body
fitting
valve
cap
Prior art date
Application number
KR1020100129031A
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Korean (ko)
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KR20120067559A (en
Inventor
김성규
윤혁준
Original Assignee
현대중공업 주식회사
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Application filed by 현대중공업 주식회사 filed Critical 현대중공업 주식회사
Priority to KR1020100129031A priority Critical patent/KR101498314B1/en
Publication of KR20120067559A publication Critical patent/KR20120067559A/en
Application granted granted Critical
Publication of KR101498314B1 publication Critical patent/KR101498314B1/en

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sliding Valves (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)

Abstract

The present invention relates to a fitting device for a pipe having a stroke limiter function, and an object of the present invention is to provide a fitting device which is provided at a port to which pilot oil hydraulic fluid is supplied and connects the valve and the pilot pipe, There is provided a piping fitting device having a function of a stroke limiter for limiting a displacement amount and having a stroke limiter function which can be easily limited to a required flow rate without using a structural change of a valve or using a separate flow control valve .
The present invention relates to a piping fitting apparatus assembled in a spool cap of a valve in a hydraulic valve having a spool controlled by pilot oil pressure,
Wherein the fitting device includes a fitting body having a connection port at both ends thereof and having a passage therein and having a screw portion at an intermediate portion thereof and a nut fastened to a screw portion formed at an intermediate portion of the fitting body,
The fitting body is provided at one end of the fitting body with a connection port on the spool cap so as to protrude into the spool cap of the hydraulic valve where the spool is located, and then the nut is fastened to the threaded portion of the fitting body to fix the position.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pipe fitting device having a stroke limiter function,

The present invention relates to a pipe fitting apparatus having a stroke limiter function, and is equipped with a valve for controlling the movement of the spool by using a pilot hydraulic pressure, so as to limit the movement of the spool, To a pipe fitting apparatus having a stroke limiter function for limiting a flow rate.

FIG. 2 is a view showing an example of the configuration of a valve in which a conventional fitting device is assembled. The end portion of the conventional fitting 6 is not sufficiently protruded to limit the maximum displacement of the spool 5, Is moved until the opening area becomes maximum.

In the case of a control valve that is applied to various hydraulic systems such as a construction machine, the amount of displacement of the spool is controlled according to the size of the pilot oil pressure, and the hydraulic oil discharged from the pump to the actuator is opened or blocked. The shape of the spool for controlling the flow rate is designed to exhibit the optimum performance in consideration of the discharge flow rate of the pump and the size of the actuator.

Sometimes, however, a smaller actuator than the original one is installed depending on the user's needs. In this case, a flow rate greater than the proper flow rate for driving the actuator is supplied, which makes it difficult to control the actuator at a proper speed do.

In order to solve this problem, the flow rate is controlled by providing a separate flow control valve for adjusting the flow rate between the valve and the actuator, or by changing the spool shape of the valve and adjusting the flow path area. There is a cost problem due to the additional installation of the valve and the replacement of the spool, and a separate device for installing the flow control valve is required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a fitting device which is installed in a port to which a pilot hydraulic fluid of a valve is supplied and connects a valve and a flow path of a pilot pipe, The present invention provides a piping fitting device having a stroke limiter function and having a stroke limiter function that can be structurally changed or restricted to a required flow rate without using a separate flow control valve.

The present invention relates to a piping fitting apparatus assembled in a spool cap of a valve in a hydraulic valve having a spool controlled by pilot oil pressure,

Wherein the fitting device comprises a fitting body having connection ports at both ends thereof, a fitting body having a flow path therein and a threaded portion at an intermediate portion thereof,

And a nut fastened to a threaded portion formed at an intermediate portion of the fitting body,

The fitting body is provided at one end of the fitting body with a connection port on the spool cap so as to protrude into the spool cap of the hydraulic valve where the spool is located, and then the nut is fastened to the threaded portion of the fitting body to fix the position.

As described above, according to the present invention, the end of the fitting body protrudes into the spool cap of the hydraulic valve. When the spool is operated by the hydraulic pressure, the end of the fitting body protruded into the spool cap contacts the spool operated by the hydraulic pressure, The amount of displacement of the spool can be arbitrarily limited, so that the flow rate can be easily controlled without changing the shape of the flow control valve or the spool.

Further, since the nut is fastened to the fitting body, it is possible to adjust the degree of fastening of the fitting body and the nut, that is, the degree of insertion of the fitting body end into the spool cap by rotating the fitting body around the nut, Can be easily changed.

Further, the present invention has a function of restricting the amount of displacement of the spool of the hydraulic valve at the same time in addition to the original function of the fitting connecting the valve and the piping, and it is possible to reduce the cost, have.

FIG. 1 is an exemplary view showing the configuration of a valve assembled with the present invention
2 is an exemplary view showing a configuration of a valve in which a conventional fitting device is assembled

FIG. 1 is a view showing an example of a valve assembly in which the present invention is assembled,

The present invention relates to a piping fitting device (50) assembled to a spool cap (42) of a valve in a hydraulic valve (40) having a spool (41) controlled by pilot hydraulic pressure;

The fitting device 50 includes a fitting body 10 having connection ports 11 at both ends thereof and having a passage 12 therein and a threaded portion 13 at an intermediate portion thereof,

And a fixing nut (20) fastened to the threaded portion (13) of the fitting body (10) to fix the position of the fitting body (10)

The fitting body 10 is installed in the spool cap 42 so that the end 14 having the connection port 11 protrudes into the spool cap inner space 43 of the hydraulic valve 40 in which the spool 41 is located, The fixing nut 20 is fastened to the threaded portion 13 of the body 10 to fix the position thereof.

The spool 41 is provided with a threaded connection port 11 on both sides thereof for performing the function of connecting pipes and having a flow path 12 for transferring hydraulic fluid to the center thereof. The fixing nut 20 and the washer 30 may be inserted into the fitting body 10 by inserting the fitting body 10 protruding into the spool cap 42 so that the stroke of the fitting nut 20 and the washer 30 may be arbitrarily limited, 10 to fix the position of the fitting body 10.

According to the present invention as described above, the position of the end 14 of the fitting body protruding into the spool cap 42 is changed according to the degree of fastening of the fitting body screw portion 13 fastened to the fixing nut 20, The amount of displacement of the hydraulic valve spool 41 is controlled by the change in the distance between the hydraulic valve spool 41 and the hydraulic valve spool 41. [

That is, in the present invention, the end 14 of the fitting body 10 assembled to the spool cap 42 protrudes into the spool cap 42 to limit the maximum displacement of the spool 41, The position of the fitting body end 14 protruding into the spool cap inner portion 43 can be arbitrarily adjusted by means of the pilot valve 20 so that the movement of the spool 41 by the pilot hydraulic oil is controlled according to the degree of protrusion of the fitting body 10 So that the degree of restriction of the maximum displacement amount of the spool 41 can be made different, and the flow rate supplied to the actuator through the spool 41 can be controlled.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

(10): fitting body (11): connection port
(12): flow path (13): thread
(14): end (20): fixing nut
(30): washer (40): hydraulic valve
(41): spool (42): spool cap
(43): spool cap interior (50): fitting device

Claims (2)

A piping fitting device assembled to a spool cap of a valve in a hydraulic valve having a spool controlled by pilot oil pressure, comprising:
Wherein the fitting device comprises a fitting body having connection ports at both ends thereof, a fitting body having a flow path therein and a threaded portion at an intermediate portion thereof,
And a fixing nut fastened to the threaded portion of the fitting body,
The fitting body is installed on the spool cap so that one end of the fitting body protrudes inside the spool cap of the hydraulic valve in which the spool is located, and then the fixing nut is fastened to the threaded portion of the fitting body to fix the position,
The amount of displacement of the spool is limited by the contact of the end of the fitting body protruding into the spool cap and the spool operated by the hydraulic pressure when the spool is operated by the hydraulic pressure so that the flow rate is controlled. A fitting device for a pipe.
The method of claim 1,
Wherein a fitting body end position of the fitting body protruding into the spool cap is adjusted by tightening the threaded portion and the nut so that a displacement amount of the hydraulic valve spool is controlled.
KR1020100129031A 2010-12-16 2010-12-16 The fitting assembly with valve stroke limiter function KR101498314B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100129031A KR101498314B1 (en) 2010-12-16 2010-12-16 The fitting assembly with valve stroke limiter function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100129031A KR101498314B1 (en) 2010-12-16 2010-12-16 The fitting assembly with valve stroke limiter function

Publications (2)

Publication Number Publication Date
KR20120067559A KR20120067559A (en) 2012-06-26
KR101498314B1 true KR101498314B1 (en) 2015-03-03

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KR1020100129031A KR101498314B1 (en) 2010-12-16 2010-12-16 The fitting assembly with valve stroke limiter function

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KR (1) KR101498314B1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08253125A (en) * 1995-03-20 1996-10-01 Daikin Ind Ltd Direct acting pressure reducing valve
JPH10184938A (en) * 1996-10-24 1998-07-14 Denso Corp Spool valve type hydraulic control valve
JP2003322272A (en) * 2002-05-01 2003-11-14 Eaton Corp Pressure control valve assembly and method for operating pressure control valve
KR100814497B1 (en) * 2007-04-02 2008-03-18 주식회사 파카한일유압 Variable flow control logic valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08253125A (en) * 1995-03-20 1996-10-01 Daikin Ind Ltd Direct acting pressure reducing valve
JPH10184938A (en) * 1996-10-24 1998-07-14 Denso Corp Spool valve type hydraulic control valve
JP2003322272A (en) * 2002-05-01 2003-11-14 Eaton Corp Pressure control valve assembly and method for operating pressure control valve
KR100814497B1 (en) * 2007-04-02 2008-03-18 주식회사 파카한일유압 Variable flow control logic valve

Also Published As

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KR20120067559A (en) 2012-06-26

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