KR20170107228A - Control valve testing apparatus for hydraulic breaker - Google Patents

Control valve testing apparatus for hydraulic breaker Download PDF

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Publication number
KR20170107228A
KR20170107228A KR1020160030893A KR20160030893A KR20170107228A KR 20170107228 A KR20170107228 A KR 20170107228A KR 1020160030893 A KR1020160030893 A KR 1020160030893A KR 20160030893 A KR20160030893 A KR 20160030893A KR 20170107228 A KR20170107228 A KR 20170107228A
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KR
South Korea
Prior art keywords
rod
control valve
coupled
spool
communication hole
Prior art date
Application number
KR1020160030893A
Other languages
Korean (ko)
Other versions
KR101791944B1 (en
Inventor
박종원
김성현
최병오
이성규
이재호
Original Assignee
한국기계연구원
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Publication date
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Priority to KR1020160030893A priority Critical patent/KR101791944B1/en
Publication of KR20170107228A publication Critical patent/KR20170107228A/en
Application granted granted Critical
Publication of KR101791944B1 publication Critical patent/KR101791944B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/02—Gearings; Transmission mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
    • F16K37/0083—For recording or indicating the functioning of a valve in combination with test equipment by measuring valve parameters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/02—Measuring force or stress, in general by hydraulic or pneumatic means

Abstract

The present invention relates to a control valve test device for a hydraulic breaker, comprising: a body having a fastening unit coupled to be connected to one side of a space unit where a spool of a control valve which is a test target is stored to be moved and having a flow passage connected to the space unit of the control valve to supply pressure fluid; and a rod of which one side is disposed inside the flow passage where the pressure fluid is supplied and spaced from the spool to be disposed to prevent contact with the spool, and the other side is disposed outside the body to be supported by an elastic means, coupled to penetrate the body, coupled to be moved in a straight line, and coupled to enable a portion between one side and the other side thereof to be coupled to the body to be sealed. The present invention can detect and control a position depending on a stroke of the spool of the control valve and measures pressure for each position of the spool to provide proper feedback to a test condition when the control valve is operated.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a control valve testing apparatus for hydraulic breakers,

The present invention relates to a control valve test apparatus for a hydraulic breaker, which can be mounted on a control valve or a piston control valve for controlling the stroke of the hydraulic breaker to simulate the actual operating conditions of the hydraulic breaker, The present invention relates to a control valve test apparatus for a hydraulic breaker, which can measure the pressure of a position of a spool in accordance with a test condition,

The hydraulic breaker is mounted on a construction machine such as an excavator, a loader, etc., and the kinetic energy of the piston reciprocating from the hydraulic power to the power source is transmitted to the chisel as impact energy to crush the rock and concrete.

The hydraulic breaker generally includes a body 10 including a back head 11, a cylinder 12, and a front head 13 as shown in Fig. 1; A piston 20 provided inside the body 10; And a chisel 30 coupled to one side of the body 10 to be hit by the operation of the piston 20; And a gas chamber 14 is formed in the back head 11 so that the upper end of the piston is disposed and the piston 20 is reciprocated by the operation of the control valve 40 formed on one side of the cylinder 12. [ So that the chisel 30 can be hammered while being moved.

The performance of such a hydraulic breaker can generally be represented by the striking energy, and the amount of energy transmitted through the chisel by a single stroke of the piston is the striking energy. The performance, durability, and reliability of the hydraulic breaker are evaluated by examining the impact energy, impact frequency, impact efficiency, and durability life of the hydraulic breaker.

In addition, hydraulic breakers have been developed with a hydraulic breaker equipped with a control valve (control valve) that can adjust the stroke of the piston to control the performance by the strength of the rock to be crushed due to the improvement of the present technology level.

However, a device for testing a control valve capable of adjusting the stroke of a conventional hydraulic breaker piston obtains necessary information by performing a test while monitoring and controlling pressure and flow rate. However, there is no test apparatus for detecting and controlling the position of the valve spool according to the stroke distance, and a test apparatus for controlling and detecting the position of the spool in the stroke control valve of the hydraulic breaker, need.

KR 10-1452901 B1 (October 14, 2014)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a spool valve which can detect and control a position according to the stroke distance of a valve spool, And to provide a control valve test apparatus for hydraulic breakers capable of providing appropriate feedback to conditions.

In order to achieve the above object, a control valve test apparatus for a hydraulic breaker according to the present invention is characterized in that a coupling portion is formed which can be coupled to one side of a space portion where a spool of a control valve to be tested is received and moved, A body connected to the space portion of the body to form a flow path for supplying the pressure fluid; And an elastic means disposed on the outside of the body so as to penetrate the body and to be moved in a straight line, one side being disposed in the flow passage through which the pressure fluid is supplied, the other side being disposed apart from the spool, A rod which is hermetically coupled to the body between one side and the other side; And a control unit.

The apparatus further comprises a displacement measuring means connected or coupled to the other side of the rod to measure a displacement caused by the linear movement of the rod.

A housing having a hollow interior and open at both sides thereof, the housing having an open side coupled to the body and an opposite side of the rod disposed therein; And both ends of the elastic means are formed to be supported on the other side of the rod and the other side of the housing.

The body is formed with a communication hole along the longitudinal direction and formed with an inlet hole so as to be connected to the communication hole and the rod is arranged in the longitudinal direction along the communication hole so that the rod is spaced from the inner circumference surface of the communication hole .

In addition, the body is formed with a fastening part at one end in the longitudinal direction where the communication hole is formed, and an inlet hole is formed so as to pass through the inner circumferential surface and the outer circumferential surface formed with the communication hole.

A piston is coupled to the other end of the rod, and the piston is coupled to the inner circumferential surface of the housing so as to be movable in the longitudinal direction.

In addition, the other end of the body coupled with the rod to penetrate the body is formed with a sealing member recess groove along the inner circumferential surface thereof, and a sealing member is interposed in the sealing member seat groove, Is sealed.

The control valve test apparatus for a hydraulic breaker of the present invention can accurately detect and control the position of the hydraulic breaker in accordance with the stroke distance of the stroke control valve spool and measure the pressure of the spool position in operation of the valve, There is an advantage to be able to test the condition to give appropriate feedback.

1 is a sectional view showing a conventional hydraulic breaker;
FIG. 2 and FIG. 3 are front sectional views showing a state in which a control valve test apparatus and a test apparatus for a hydraulic breaker of the present invention are mounted on a control valve.
4 is a circuit diagram showing a control valve and a hydraulic circuit connected thereto according to the present invention.
5 and 6 are an assembly sectional view and an exploded sectional view showing a sensor block which is a control valve test apparatus for a hydraulic breaker of the present invention.

Hereinafter, a control valve testing apparatus for a hydraulic breaker of the present invention having the above-described configuration will be described in detail with reference to the accompanying drawings.

[Example 1]

2 and 3 are front cross-sectional views showing a state in which a control valve test apparatus and a test apparatus for a hydraulic breaker of the present invention are mounted on a control valve, and Fig. 4 is a circuit diagram showing a control valve and a hydraulic circuit connected thereto according to the present invention 5 and 6 are an assembly sectional view and an exploded sectional view showing a sensor block which is a control valve testing apparatus for a hydraulic breaker of the present invention.

As shown in the figure, the control valve testing apparatus 1000 for a hydraulic breaker of the present invention can be coupled to one side of a space portion 2 in which a spool 3 of a control valve 1 to be tested is received and moved A body 110 formed with a coupling part 113 and connected to the space part 2 of the control valve 1 to form a flow path for supplying pressure fluid; And one end of which is disposed so as not to be in contact with the spool 3 so as to be in contact with the other end of the body 110, A rod 140 which is disposed outside of the body 110 and is supported by the elastic means 150 and which is hermetically sealed with the body 110 between one side and the other side; . ≪ / RTI >

As shown in FIGS. 3 and 4, the control valve 1 to be tested is formed with a plurality of hydraulic ports 4 so as to supply hydraulic pressure for each stroke number of the hydraulic breaker piston. The hydraulic port 4 is a pressure fluid A plurality of discharge ports can be formed in which the flow path can be connected and discharged selectively as the spool 3 is slid and moved in the inflow port and the inner space portion 2 into which the inflow port and the inflow port are supplied. And the control valve 1 is coupled to the manifold block 7 so that a plurality of discharge ports are supplied to the piston side of the hydraulic breaker through the flow path formed in the manifold block 7. [ The manifold block 7 is fixed to the block jig 8 so that the control valve 1 can be fixed. Further, the control valve 1 may be formed with a return port such that the pressure fluid is discharged to return to the main tank in which the operating fluid is received. The control valve 1 is formed so that the spool 3 can be moved in the longitudinal direction in accordance with the pressure of the pressure fluid filled in the space portion 2 and one side of the space portion 2 is formed to be open, The fluid can be supplied and the other side is blocked by the pre-pressure regulating valve 6. A spring 5 is interposed between the preload control valve 6 and the spool 3 to rotate the preload control valve 6 to adjust the initial position of the spool 3 and the space The position of the spool 3 relative to the pressure can be adjusted.

Here, the apparatus 1000 for testing a control valve for a hydraulic breaker according to an embodiment of the present invention includes a control valve for a hydraulic breaker, which is installed in the control valve for the hydraulic breaker, And can be mounted on the control valve 1 so as to be connected to one side of the space portion 2 of the control valve 1 as shown in FIG.

The body 110 may be coupled to the space portion 2 of the control valve 1 by forming a coupling portion 113 on the body 110. The body 110 is provided with a flow passage for supplying the pressure fluid to the space portion 2 so that the pressure fluid supplied from the outside flows into the space portion of the control valve 1 through the flow passage formed in the body 110 can do. The flow path formed inside the body 110 may be a communication hole 111 and an inlet hole 112. The inlet hole 112 may be a port for connecting a hydraulic pipe from the outside, May serve as a communication passage for connecting the inlet hole 112 and the space portion 2 of the control valve 1. [

The rod 140 may be coupled to penetrate the body 110 and the rod 140 may be coupled to the body 110 and coupled to move in a straight line. The rod 140 may be disposed in the flow path of the body 110 to which the pressure fluid is supplied and the other side may be disposed outside the body 110. One end of the rod 140 may be spaced apart from the spool 3 of the control valve 1 so that the spool 3 is not contacted even if the rod 140 is linearly moved. . The other end of the rod 140 disposed outside the body 110 may be supported by the elastic means 150 and may be connected to the rod 110 through a portion of the rod 140 that is inserted into the body 110 between one side and the other side of the rod 140. [ The rod 140 and the body 110 may be hermetically sealed so that the pressure fluid does not leak to the outside along the flow path formed in the body 110.

When the coupling part 113 of the body 110 is coupled to the inlet side of the space part 2 of the control valve 1 and the flow path formed in the space part 2 and the body 110 is connected When the pressure fluid is supplied into the space portion 2, the spool 3 is moved according to the pressure of the pressure fluid, and the rod 140 can also be moved by the pressure of the pressure fluid. At this time, the displacement of the spool of the control valve can be indirectly measured by measuring the displacement at which the rod 140 is moved.

The apparatus for testing a control valve for a hydraulic breaker according to the present invention may further include displacement measuring means 200 connected to or coupled to the other side of the rod 140 to measure a displacement caused by the linear movement of the rod 140 Lt; / RTI > Accordingly, the displacement of the spool can be indirectly measured by using the displacement of the rod, while the displacement of the rod can be measured by using the displacement measuring means (200). The other side of the displacement measuring means 200 may be fixed to the control valve 1 by using the fixing bracket 300 or the like. In this case, the displacement measuring means 200 may be connected to or coupled to the other side of the rod 140, Or fixed in various forms.

Accordingly, it is possible to accurately detect and control the position of the hydraulic breaker in accordance with the stroke distance of the stroke control valve spool, and to measure the pressure of each position of the spool at the time of operation of the valve, There is an advantage to be able to test the appropriate test conditions.

The spool 3 and the rod 140 according to the present invention are arranged and formed so that the spool 3 and the rod 140 are not in contact with each other even if displacement occurs due to the pressure fluid being supplied and the spool 3 of the control valve and the rod 140 according to the present invention being moved, The impact or vibration due to the operation of the rod 140 may not be transmitted directly to the rod 140, so that the accuracy and reliability for the displacement measurement can be improved.

[Detailed Embodiment]

A housing 120 formed to be hollow inside and open at both sides thereof and having an opened one side coupled to the body 110 and having the other side of the rod 140 disposed therein; And both ends of the elastic means 150 may be supported on the other side of the rod 140 and the other side of the housing 120. [

That is, the housing 120 may have a through-hole 121 formed therethrough in the longitudinal direction thereof, and may be formed as a pipe having both open sides, and an open side thereof may be fixedly coupled to the body 110. The other side of the rod 140 may be disposed in the through hole 121 inside the housing 120 and the other side of the rod 140 may be spaced apart from the inner circumferential surface of the through hole 121. The other end of the housing 120 is opened so that an insertion hole 123 having a diameter smaller than the diameter of the through hole 121 is formed in the longitudinal direction so that the insertion hole 123 is formed in the inner peripheral surface of the through hole 121 And may be formed as a stepped protrusion 122 protruding from the protrusion 122. [ At this time, the elastic means 150 is interposed between the other end of the rod 140 and the step 122 so that both ends of the elastic means 150 can be held in close contact with the other end of the rod 140 by the step 122 . The displacement measuring means 200 is inserted from the outside of the housing 120 through the insertion hole 123 through which the through hole 121 inside the housing 120 and the outside of the housing 120 communicate with each other, 140 can be measured.

The body 110 has a communication hole 111 formed along the longitudinal direction and an inlet hole 112 formed to be connected to the communication hole 111. The rod 140 has a communication hole 111, So that the rod 140 is spaced apart from the inner circumferential surface of the communication hole 111.

As shown in the drawing, an inlet hole 112 is formed in the body 110 to be connected to the communication hole 111 formed in the longitudinal direction, and one side of the rod 140 is arranged in the longitudinal direction along the communication hole 111 One side of the rod 140 may be disposed in the communication hole 111 and the rod 140 may be spaced apart from the inner circumference of the communication hole 111. Thus, the rod 140 is easily moved in the longitudinal direction, and the pressure fluid can be easily supplied between the communication hole 111 and the rod 140. In addition, since the passage through which the pressure fluid flows and the space through which the rod 140 is disposed can be the same, the structure is simple and can be easily manufactured.

The body 110 is formed with a coupling part 113 at one longitudinal side end where the communication hole 111 is formed and an inlet hole 112 is formed so as to pass through the inner peripheral surface and the outer peripheral surface formed with the communication hole 111 .

In other words, a communicating hole 111 is formed in the body 110 with one side opened in the longitudinal direction, and a fastening part 113 is formed on the outer peripheral surface of the opened left end part of the communication hole 111, And an inlet hole 112 is formed so as to pass through the inner peripheral surface of the communicating hole 111 and the communicating hole 111 formed in the direction perpendicular to the communicating hole 111 and the outer peripheral surface of the body 110 . At this time, the inflow hole 112 may be formed in an inclined direction in addition to the direction perpendicular to the communication hole 111. Thus, it is easy to fasten the fastening part 113 of the body 110 to the control valve 1 and fasten them so that the piping to which the pressure fluid is supplied is connected to the inlet hole 112.

A piston 130 is coupled to the other end of the rod 140. The piston 130 may be closely attached to the inner circumferential surface of the housing 120 to be movable in the longitudinal direction.

That is, the piston 130 is coupled to the other end of the rod 140 and the piston 130 is brought into close contact with the inner circumferential surface of the through hole 121 of the housing 120 so that the piston 130 And the rod 140 can be moved together. Thus, the other side of the rod 140 can be prevented from moving in other directions than the longitudinal direction, so that the vibration and shaking of the rod 140 can be prevented, and the displacement of the rod 140 can be measured using the displacement measuring means 200 The accuracy can be improved. At this time, a groove is formed in the outer circumferential surface of the piston 130 along the circumferential direction so that a sealing member 131 is interposed between the piston 130 and the housing 120 to seal the groove.

A sealing member seat groove 114 is formed in the other end of the body 110 coupled with the rod 140 so as to penetrate the body 110. The sealing member seat groove 114 is formed in the sealing member seat groove 114 A sealing member 115 is interposed between the body 110 and the rod 140 by the sealing member 115. [

A sealing member 115 (not shown) is disposed at the other end of the body 110 for separating the inside of the body 110 and the inside of which the communication hole 111 is formed from the rod 140 passing through the body 110. [ A sealing member seat groove 114 is formed along the circumferential direction concave on the inner circumferential surface of the hole through which the rod 140 formed at the other end of the body 110 is passed and a sealing member such as an O- (115) can be inserted and closed.

The body 110 and the housing 120 are coupled to each other and include a body 110, a housing 120, a rod 140 coupled with the piston 130, and an elastic means 150, And may be formed as an assembled sensor block 100.

The coupling part 113 formed on the body 110 may be formed of a male screw thread and may be screwed with a female screw thread formed on the control valve 1. The coupling part 113 may be formed as a parallel screw, The pressure fluid can be prevented from leaking from the portion to be coupled by sealing the sealing member on the opposite surface in the direction in which the sealing member 110 is inserted. The inlet hole 112 formed in the body 110 is formed of a tapered screw so that a pipe for supplying a working fluid from the outside can be coupled using a fastener or the like to seal the coupled portion. Further, the portion where the body 110 and the housing 120 are coupled is also formed as a parallel screw, and is tightly contacted via the sealing member, so that the coupled portion can be sealed.

The outer circumferential surface of the body 110 and the outer circumferential surface of the housing 120 are formed in a circular shape and a part of the outer circumferential surface of the body 110 and the housing 120 may be flat, have.

In addition, the displacement measuring means 200 may be a means for directly measuring a displacement due to a linear movement, such as a linear variable differential transformer (LVDT), in contact with the rod. Here, LVDT is a type of electrical transducer measuring linear distance difference, in which three solenoid coils are located in the form of surrounding tube, the middle coil is main and the other two are outside, and a cylinder- The displacement measuring means 200 fixes the body to the bracket 300 and measures the displacement by measuring the displacement of the body in the form of a long round bar so that the displacement can be measured while moving linearly in the longitudinal direction. And the end of the bar is in contact with the end of the rod 140. [ At this time, an elastic member such as a spring is provided inside the displacement measuring means 200, so that the bar can be maintained in a state of being closely attached to the rod 140.

 Alternatively, the displacement measuring means 132 may be formed of an encoder, a potentiometer, or the like to measure the displacement caused by the movement of the rod 140. In addition, the displacement measured by the movement of the rod may be indirectly measured You may.

In addition, the resilient means 150 may be formed of a coil spring as shown, or may be formed in various other ways.

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 by the appended claims. It goes without saying that various modifications can be made.

1000: Control valve test device for hydraulic breaker
1: control valve 2:
3: spool 4: hydraulic port
5: Spring 6: Preload regulating valve
7: Manifold block 8: Block jig
100: Sensor block
110: Body
111: communication hole 112: inlet hole
113: fastening part 114: sealing member positioning groove
115: sealing member
120: Housing
121: Through hole 122:
123: Insertion hole
130: Piston
131: sealing member
140: rod 150: elastic means
200: displacement measuring means
300: Fixed bracket

Claims (7)

A body formed with a coupling part which can be coupled to one side of a space part where a spool of a control valve to be tested is accommodated and moved and is connected to a space part of the control valve to supply a pressure fluid; And
And the other end is disposed on the outside of the body so as to be separated from the spool by the elastic means, A rod which is hermetically coupled to the body between one side and the other side; And a control device for controlling the hydraulic valve.
The method according to claim 1,
Further comprising displacement measuring means connected or coupled to the other side of the rod to measure a displacement caused by linear movement of the rod.
The method according to claim 1,
A housing having a hollow interior and open at both sides thereof, the housing having an opened one side coupled to the body and an opposite side of the rod disposed therein; Further comprising:
Wherein both ends of the elastic means are formed to be supported on the other side of the rod and the other side of the housing.
The method according to claim 1,
Wherein the body is formed with a communication hole along the longitudinal direction and formed with an inlet hole to be connected to the communication hole and the rod is disposed in the longitudinal direction along the communication hole so that the rod is spaced from the inner circumferential surface of the communication hole. Control valve test equipment for hydraulic breakers.
5. The method of claim 4,
Wherein the body is formed with a fastening part at one longitudinal side end where the communication hole is formed and an inlet hole is formed so as to pass through the inner circumferential surface and the outer circumferential surface where the communication hole is formed.
The method according to claim 1,
Wherein a piston is coupled to the other end of the rod, and the piston is coupled to the inner circumferential surface of the housing so as to be movable in the longitudinal direction.
The method according to claim 1,
A sealing member recess groove is formed in the other end of the body coupled with the rod so as to penetrate through the body and the sealing member is recessed along the inner circumferential surface of the body, a sealing member is interposed in the sealing member seat groove, Wherein the control valve is hermetically sealed.
KR1020160030893A 2016-03-15 2016-03-15 Control valve testing apparatus for hydraulic breaker KR101791944B1 (en)

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Application Number Priority Date Filing Date Title
KR1020160030893A KR101791944B1 (en) 2016-03-15 2016-03-15 Control valve testing apparatus for hydraulic breaker

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Application Number Priority Date Filing Date Title
KR1020160030893A KR101791944B1 (en) 2016-03-15 2016-03-15 Control valve testing apparatus for hydraulic breaker

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KR20170107228A true KR20170107228A (en) 2017-09-25
KR101791944B1 KR101791944B1 (en) 2017-11-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110261100A (en) * 2019-07-15 2019-09-20 天津英创汇智汽车技术有限公司 Valve detection method and valve detection system
CN110487535A (en) * 2019-09-19 2019-11-22 上海精博塑料电子有限公司 A kind of test equipment and its test method of Pull breaking ualve

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3811643B2 (en) * 2001-12-03 2006-08-23 カヤバ工業株式会社 Displacement measuring device
CN203432564U (en) * 2013-09-06 2014-02-12 中联重科股份有限公司 Valve core displacement measuring device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110261100A (en) * 2019-07-15 2019-09-20 天津英创汇智汽车技术有限公司 Valve detection method and valve detection system
CN110487535A (en) * 2019-09-19 2019-11-22 上海精博塑料电子有限公司 A kind of test equipment and its test method of Pull breaking ualve
CN110487535B (en) * 2019-09-19 2021-03-23 上海精博塑料电子有限公司 Test equipment and test method for snap valve

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