KR20170049032A - Control device of relief valve with test gag - Google Patents

Control device of relief valve with test gag Download PDF

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Publication number
KR20170049032A
KR20170049032A KR1020150149878A KR20150149878A KR20170049032A KR 20170049032 A KR20170049032 A KR 20170049032A KR 1020150149878 A KR1020150149878 A KR 1020150149878A KR 20150149878 A KR20150149878 A KR 20150149878A KR 20170049032 A KR20170049032 A KR 20170049032A
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KR
South Korea
Prior art keywords
pilot
main
chamber
flow path
passage
Prior art date
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KR1020150149878A
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Korean (ko)
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KR101782422B1 (en
Inventor
최영환
김도형
김규철
석승훈
Original Assignee
주식회사 코밸
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Priority to KR1020150149878A priority Critical patent/KR101782422B1/en
Publication of KR20170049032A publication Critical patent/KR20170049032A/en
Application granted granted Critical
Publication of KR101782422B1 publication Critical patent/KR101782422B1/en

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    • 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
    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • 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

Abstract

The present invention relates to an operation control device of a relief valve having a test gag, which temporarily stops the operation of a relief valve to simply inspect whether a main valve constituting the relief valve properly operates while maintaining the durability and airtightness thereof up to a predesignated pressure value. The operation control device is provided on one side of a main hood (112) and comprises: an insertion hole (12) which is formed to penetrate through one outer side of the main hood (112) to be connected to a pilot second discharge passage (151d), and has a screw thread (13) provided on the inner surface thereof; a closing bolt (14) of which one portion is exposed through the outer surface of the main hood (112) and the other portion is engaged with the screw thread; a closing rod including a coupling end (16) detachably coupled to one end portion of the closing bolt (14) and an insertion end (17) extended from the coupling end (16) and inserted into the insertion hole (12) to close a passage between the pilot second discharge passage (151d) and a pilot third discharge passage (151e); and a closing ring (18) provided along the outer peripheral surface of the coupling end (16) in the closing rod.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a control device for a relief valve,

The present invention relates to an operation control mechanism of a relief valve equipped with a test gauge, and more particularly, to an operation control mechanism of a relief valve which temporarily stops the operation of the relief valve to maintain the durability and hermeticity close to the designed pressure value of the relief valve, The present invention relates to a control device that can easily check whether the device is operating.

The relief valve is a kind of safety valve that ensures the stable operation of the valve by discharging a part of the fluid to the outside when the pressure of the fluid flowing through the pipe becomes larger than the set pressure. Therefore, if fluid pressure above a certain pressure is applied to the inside of the valve, the relief valve must discharge the part of the fluid by quickly and accurately opening the disk, and even if the fluid maintains a constant pressure, The error to the operating pressure should be small.

On the other hand, after the valve is manufactured and assembled, the valve is inspected for pressure and airtightness by performing a hydraulic test before installation on the site. In this case, the inlet and the outlet of the valve are sealed using a separate hydraulic test apparatus And a method of supplying high-pressure water was used. However, in the case of the conventional relief valve, it is necessary to provide a separate flange device that necessarily closes the inlet or the outlet for the hydraulic test due to its structural characteristics. Therefore, the preparation time for the hydraulic test and the disassembly process after the completion of the test There was a lot of trouble.

To this end, the Applicant has proposed Korean Patent No. 1472062 to more accurately perform the opening and closing operation of the valve and the water pressure test at the set pressure, which is the original function of the relief valve. 3, a test gag 154, which is simple in structure and easy to install, is provided inside the pilot valve 150 without using a separate device for closing the flow path of the valve during the water pressure test of the valve There are features attached.

In this case, since the inspection work can be performed even when there is no separate device for closing the outlet 102 of the main valve 110 in the hydraulic test of the valve, the work process required for the hydraulic pressure test of the valve is remarkably simplified, This has the advantage of being very short. However, this technique basically checks whether or not the main valve 110 itself maintains internal pressure or airtightness in that it has a structure in which the test gag 154 is mounted on the pilot valve 150 that controls the operation of the main valve 110 There is no way to do it.

This is because it is a pilot valve that is installed so that the valve can be operated in a state of a pressure value (set pressure value) which is usually smaller than a maximum pressure value (design pressure value) that the main valve itself can withstand. As long as the pilot valve is normally operated, the fluid flowing inside the valve maintains a state smaller than the set pressure value in accordance with the operation of the pilot valve. Hitherto, there has been no way in the relief valve to determine if the actual main valve is exposed to a pressure close to the design pressure value and whether the valve itself can withstand damage.

Korean Patent No. 1472062

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pressure relief valve for an internal pressure of a main valve when a main valve is exposed to a pressure corresponding to a design pressure value, And to provide a control mechanism capable of testing the degree of confidentiality.

In order to achieve the above object, according to the present invention, there is provided a seat front passage 101a having a seat front passage 101a connected to a fluid inlet 101 and an outlet passage 102a connected to a fluid outlet 102, A first inflow channel 111a is formed in a horizontal direction and a second inflow channel 111b connected to the first inflow channel 111a is formed in a vertical direction and spaced apart from the second inflow channel 111b by a predetermined distance And the other end is formed in a straight line on the seat front flow path 101a of the main body 111. The main body 111 includes a main body 111 having a pilot third discharge flow passage 151e connected to the fluid outlet 102, A disk guide 116 guiding the linear movement of the main disk 114 and having a chamber 118 formed therein, a disk guide 116 mounted on the main disk 114, And a main spring 117 The main valve (110) and; A third inflow passage 111c connected to the second inflow passage 111b is formed in a first direction and a chamber (not shown) formed in the inside of the disc guide 116 The first chamber flow path 111e and the second chamber flow path 111f are connected to the first chamber flow path 111a and the second chamber flow path 111f and the first chamber flow path 111e and the second chamber flow path 111f, A pilot first inlet flow path 151a and a pilot second inlet flow path 151b for connecting the pilot second inlet flow path 151a and the pilot second inlet flow path 151b are formed, A main bonnet 112 formed therein; A pilot body 151 coupled to the upper portion of the main bonnet 112 and a pilot body 151 formed in the other side of the pilot body 151 and having one end connected to the disk chamber 160a, A pilot third exhaust passage 151c connected to the pilot chamber 151a and a pilot chamber 151a connected to the pilot chamber 151a, a disk chamber 160a serving as a space formed in the pilot body 151, A screw bush 158 is provided in the inner space of the pilot bonnet 153 which is coupled to one side of the pilot body 151 and the other end is fixed to the pilot bonnet 153 and a thread is formed on a part of the inner circumferential surface, A pilot spring 155 which is mounted on the outer diameter portion of the test gag 154 to apply an elastic force to the linear motion of the pilot disk 160b and a pilot spring 155 which extends to the inside of the test gag 154, Provided And a test valve adjusting screw (159) mounted on the inner circumferential surface of the screw bush (158) so as to be linearly moved relative to the inner circumferential surface of the screw bush (158). The relief valve And a control mechanism is provided at one side of the main bonnet 112. The control mechanism is inserted through one side of the outer surface of the main bonnet 112 so as to be connected to the pilot second discharge passage 151d, And the other end portion is exposed through the outer surface of the main bonnet 112 and the one end portion is engaged with the thread 13 and the other end portion of the detachable bolt 14 is fitted to one end portion of the closing bolt 14. [ And an insertion end 17 which extends from the coupling end 16 and is inserted into the insertion hole 12 to close a flow path between the pilot second and third discharge flow paths 151d and 151e ), And a sealing member Including the closing ring 18 is provided along the outer circumferential surface chains rod mounting platform (16) and that consisting of the technical characteristics.

The present invention proposes a configuration in which a worker can temporarily close the path of the fluid discharged according to the operation of the pilot valve in the relief valve provided with the test gog, It is very easy to preliminarily check whether the valve is functioning normally to the originally designed pressure value and whether the main valve is in operation properly, It is possible.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic external view of a relief valve provided with a control mechanism according to the present invention; FIG.
2 is a schematic cross-sectional structural view of a relief valve provided with a control mechanism according to the present invention;
3 is a schematic sectional configuration view of a relief valve in which a conventional test gas is provided;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the technical features of the present invention, A detailed description thereof will be omitted.

FIG. 1 is a schematic external view of a relief valve provided with a control mechanism according to the present invention, and FIG. 2 is a schematic cross-sectional view of a relief valve provided with a control mechanism according to the present invention. The present invention is characterized in that it includes the main valve 110, the pilot valve 150, and a control mechanism basically as shown in the drawings. Each of these configurations will be described in detail.

The main valve 110 is installed so that the main disc 114 is linearly moved up and down by a main spring 117 mounted on the chamber 118 and a first connection flange 113a is fastened by a fastening bolt 131a . A fluid inlet port 101 is formed in the first connection flange 113a and a seat front flow path 101a connected to the fluid inlet port 101 is formed below the main disk 114 of the main valve 110 . Reference numeral 114a denotes a main disc sheet.

A second connection flange 113b having a fluid outlet 102 therein is coupled to the right side of the main valve 110 by fastening bolts 131c. The fluid outlet 102 is connected to the outlet passage 102a of the main valve 110. A main valve 112 is coupled to the upper portion of the main valve 110 by a fastening bolt 131b and a pilot valve 150 is coupled to an upper portion of the main bonnet 112.

The main disk 114 in the main valve 110 is guided by the disk guide 116 in a linear motion and is guided by a main spring 117 mounted vertically in the chamber 118 which is a hollow inner space of the disk guide 116 And is opened and closed. The main body 111 of the main valve 110 is formed with a first inlet flow passage 111a in the horizontal direction and a second inlet flow passage 111b in the vertical direction communicating with the seat front flow passage 101a.

The second inflow channel 111b is connected to the third inflow channel 111c formed in the horizontal direction in the main bonnet 112. The third inflow channel 111c is connected to the first chamber 111b communicating with the chamber 118. [ And is connected by the flow path 111e and the reduction flow path 111d. The reducing passage 111d is a connecting passage formed so as to have a diameter smaller than that of the first to third inflow passages 111a to 111c. The reducing flow path 111d and the first chamber flow path 111e are formed inside the main bonnet 112 and are located at the upper portion of the chamber 118.

A pilot first inlet flow path 151a is connected to the upper portion of the third inlet flow path 111c and communicates with the disk chamber 160a formed in the pilot body 151 of the pilot valve 150 located at the upper portion . Further, the pilot third discharge passage 151e is formed in a vertical direction with a predetermined distance from the second inlet passage 111b. And the other end portion of the pilot third discharge flow passage 151e is connected to the fluid outlet 102. [

The second chamber flow path 111f is formed in parallel with the first chamber flow path 111e and the second chamber flow path 111f is formed in the main bonnet 112 on the upper side of the chamber 118, And is connected to the pilot second inflow passage 151b communicating with the right end of the chamber 160a. A pilot second discharge flow path 151d is formed at a position spaced apart from the pilot second inflow path 151b by a predetermined distance.

Reference numeral 132a and 132b denote a hexa socket plug for opening and closing the first inflow passage 111a and the third inflow passage 111c, respectively, in a detachable manner if necessary. In addition, reference numerals 113a, 114a, 115a, and 160b are O-rings.

The pilot valve 150 is mounted on an upper portion of the main bonnet 112 and serves to regulate the flow of the fluid according to the set pressure. The pilot valve 150 includes a pilot body 151 directly fastened to the upper portion of the main bonnet 112, A pilot disk 160b linearly moving left and right inside the disk chamber 160a which is a space formed in the inside of the pilot disk 160, and a rod-shaped test gogg connected with one side (left end in the drawing) of the pilot disk 160b 154, a spring sheet 156 mounted on the outer diameter portion of the test goggles 154 and facing each other, a pilot spring 155 mounted on the spring seat 156, And a test dog adjusting screw 159 mounted thereon.

Specifically, a pilot bonnet 153 having a hollow portion is coupled to one side (left end in the drawing) of the pilot body 151, and a cap 152 is coupled to one side of the pilot bonnet 153 as shown in the figure. The disk chamber 160a, which is a space formed inside the pilot body 151, is provided with a pilot disk 160b which reciprocates linearly in the left and right direction.

A first pilot inlet passage 151a and a pilot second inlet passage 151b extending from the main bonnet 112 at the lower side are connected to the disk chamber 160a. The pilot third discharge passage 151c is formed in the other side of the pilot body 151. [ One end of the pilot third discharge passage 151c is connected to the disc chamber 160a and the other end is connected to the pilot second discharge passage 151d. A test gag 154 is connected to one side of the pilot disk 160b.

At this time, the other end of the test goggles 154 is located inside the screw bush 158 fixedly coupled to the pilot bonnet 153 and threaded on the inner circumferential surface thereof. Inside the screw bush 158 located on the other side of the test goggles 154, a test goggle adjusting screw 159 for forming a thread on the outer circumferential surface is screwed. Reference numeral 157 denotes a locknut.

The right end of the test gog adjusting screw 159 and the left end of the test goggle 154 are spaced apart from each other at regular intervals and when the pressure exceeding the set pressure is inputted to the pilot valve 150, 160b move linearly to the left while compressing the pressure of the pilot spring 155, and return to the original state when the pressure falls below the set pressure.

The control mechanism includes an insertion hole (12), a closing bolt (14), a closing rod, and a closing ring (18). The insertion hole 12 is formed through one side of the outer surface of the main bonnet 112 and is connected to the pilot second discharge passage 151d. It is preferable that a thread 13 is provided on the inner surface of the insertion hole 12.

The one end portion of the closing bolt 14 is engaged with the thread 13 of the insertion hole 12 and the other end portion of the closing bolt 14 is exposed through the outer surface of the main bonnet 112. Reference numeral 15 denotes a fixed nut. The closing rod is inserted into the insertion hole 12 and is a means for closing the flow path between the pilot second and third discharge flow paths 151d and 151e and comprises a coupling end 16 and an insertion end 17. The coupling end 16 is detachably coupled to one end portion of the closing bolt 12 and the insertion end 17 extending from the coupling end 16 is inserted into the insertion hole 11. [

The closing rod may be used in connection with a closing bolt if necessary, where it is necessary to test whether the main valve stably operates with durability and airtightness up to the initially designed set pressure value prior to the installation of the relief valve, or It means when the relief valve is installed and it is used for a long time and the intermediate check for the main valve is required.

The closing ring 18 is provided along the outer circumferential surface of the coupling end 16 of the closed rod as a means for preventing the leakage of the fluid through the insertion hole 12. It is preferable that the closing ring 18 is installed in a state where an insertion groove (not shown) is formed at a predetermined depth on the outer surface of the coupling end 16 as shown in the drawing. The closing ring may be formed as a plurality as shown in the drawing and may be made of a conventional O-ring.

The schematic operating configuration of the present invention having such a configuration will be schematically described with reference to Fig. FIG. 2 is a diagram showing a state before a relief valve according to the present invention is manufactured and assembled and then installed in a pipe. That is, in the state where the closing rod is fastened to the closing bolt 14, a separate test pipe for supplying and discharging the high-pressure fluid is installed in each of the fluid inlet 101 and the fluid outlet 102.

The fluid having a pressure greater than the working pressure of the pilot valve 150 flows through the fluid inlet 101. [ A part of the fluid introduced through the first to third inlet flow paths 111a to 111c of the main valve 110 flows into the pilot first inlet flow path 151a To the disk chamber 160a, thereby pushing the pilot disk 160b in one direction.

When the pilot disk 160b moves in one direction, a part of the fluid filled in the space above the disk 114 enters the pilot second discharge passage 151d through the pilot first discharge passage 151c. At this time, since the pilot second discharge flow passage 151d and the pilot third discharge flow passage 151e are closed by the closing rod 16, the fluid which has entered the pilot second discharge flow passage 151d flows into the third The fluid does not escape to the fluid outlet 102 through the flow path 151e and is stagnated.

That is, when a part of the fluid filled in the space above the disk 114 sequentially passes through the pilot first, second, and third discharge flow paths 151c, 151d, and 151e to the fluid discharge port 102, Unlike the operation of the normal pilot valve in which the main valve 110 is opened and the fluid flows to the fluid discharge port 102 to relieve the high pressure state, In the present case, the presence of the closing rod 16 prevents the pilot valve from operating normally.

Accordingly, a high fluid pressure is continuously applied to the disk 114 of the main valve 110, and this state is maintained to a value close to the design pressure value of the main valve. As a result of the test, if the manufactured main valve can not withstand the initially designed pressure value and is damaged or hermetic, it means that the design pressure value for the main valve itself was wrongly calculated or there was a problem in the main valve manufacturing process An immediate recalculation or scrutiny of the production process is required.

When the test is completed and the stability check of the main valve is completed, the closing bolt 14 is released to remove the closing rod from the insertion hole 12, and the closing bolt 14 and the coupling end 16 are separated from each other. 14 are connected to the insertion hole 12, the pilot second discharge passage 151d and the pilot third discharge passage 151e are mutually connected so that the pilot valve 150 is normally operated. In this state, the relief valve Installed on the necessary piping. If the main valve needs to be re-inspected for a long period of time after the installation of the relief valve is completed, the separated closing rod may be fastened again with the closing bolt 14 and simply inserted into the insertion hole 12. [

As described above, according to the present invention, whether or not the main valve of the relief valve installed in the piping normally functions to maintain the durability and the airtightness maintaining function to the originally designed pressure value can be easily checked in advance or re- There is a possible advantage.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. It will be apparent that the present invention can be practiced with added features.

12: Insertion hole 13:
14: Closing bolt 15: Fixing nut
16: coupling end 17: insertion end
18: closed ring
100: Relief valve 110: Main valve
111: main bodies 111a to 111c: first to third inflow channels
111d: Reduction flow passages 111e, 111f: First to second chamber flow paths
112: main bonnet 113a: first connection flange
113b: second connection flange 114: main disk
115: main disc sheet 116: disc guide
117: main springs 131a to 131c: fastening bolts
132a, 132b: Hex socket plug 150: Pilot valve
151: pilot body 151a: pilot first inlet flow path
151b: pilot second inflow channels 151c to 151e: pilot first to third discharge channels
152: Cap 153: Pilot bonnet
154: Test Gag 155: Pilot spring
156: spring seat 157: lock nut
158: screw bush 159: test gag adjustment screw
160a: Disk chamber 16b: Pilot disk

Claims (1)

A first inflow passage 111a having a seat front passage 101a connected to the fluid inlet 101 and an outlet passage 102a connected to the fluid outlet 102 is connected to the seat front passage 101a, A second inflow channel 111b connected to the first inflow channel 111a is formed in a vertical direction and is formed in a vertical direction spaced apart from the second inflow channel 111b by a predetermined distance, A main body 111 having a pilot third discharge passage 151e connected to the outlet 102 and a main disk 114 formed to linearly move on the seat front passage 101a of the main body 111, A disk guide 116 guiding the linear movement of the main disk 114 and having a chamber 118 formed therein and a main spring 117 mounted on the main disk 114 to apply an elastic force to the main disk 114 A main valve 110; A third inflow passage 111c connected to the second inflow passage 111b is formed in a first direction and a chamber (not shown) formed in the inside of the disc guide 116 The first chamber flow path 111e and the second chamber flow path 111f are connected to the first chamber flow path 111a and the second chamber flow path 111f and the first chamber flow path 111e and the second chamber flow path 111f, A pilot first inlet flow path 151a and a pilot second inlet flow path 151b for connecting the pilot second inlet flow path 151a and the pilot second inlet flow path 151b are formed, A main bonnet 112 formed therein; A pilot body 151 coupled to the upper portion of the main bonnet 112 and a pilot body 151 formed in the other side of the pilot body 151 and having one end connected to the disk chamber 160a, A pilot third exhaust passage 151c connected to the pilot chamber 151a and a pilot chamber 151a connected to the pilot chamber 151a, a disk chamber 160a serving as a space formed in the pilot body 151, A screw bush 158 is provided in the inner space of the pilot bonnet 153 coupled to one side of the pilot body 151 and the other end is fixed to the pilot bonnet 153 and a thread is formed on a part of the inner circumferential surface, A pilot spring 155 which is mounted on the outer diameter portion of the test gag 154 to apply an elastic force to the linear motion of the pilot disk 160b and a pilot spring 155 which extends to the inside of the test gag 154, Provided And a pilot valve (150) composed of a test dog adjustment screw (159) fitted to the inner circumferential surface of the screw bush (158) and mounted so as to move linearly before the societies, the relief valve comprising:
A control mechanism is provided on one side of the main bonnet 112. The control mechanism is formed to penetrate through one side of the outer surface of the main bonnet 112 so as to be connected to the pilot second discharge passage 151d, And the other end portion is exposed through the outer surface of the main bonnet 112 and the one end portion is engaged with the thread 13; and the closing bolt 14, And an insertion hole (12) extending from the coupling end (16) and closing the flow path between the pilot second and third discharge flow paths (151d, 151e) And a closing ring (18) provided along the outer circumferential surface of the coupling end (16) of the closing rod. The operation control device according to claim 1, wherein the closing ring (18)
KR1020150149878A 2015-10-28 2015-10-28 Control device of relief valve with test gag KR101782422B1 (en)

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KR1020150149878A KR101782422B1 (en) 2015-10-28 2015-10-28 Control device of relief valve with test gag

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Application Number Priority Date Filing Date Title
KR1020150149878A KR101782422B1 (en) 2015-10-28 2015-10-28 Control device of relief valve with test gag

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KR20170049032A true KR20170049032A (en) 2017-05-10
KR101782422B1 KR101782422B1 (en) 2017-10-23

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Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3323344B2 (en) * 1994-11-22 2002-09-09 エスエムシー株式会社 Double solenoid type solenoid valve
JP4462858B2 (en) 2003-07-29 2010-05-12 株式会社横田製作所 Automatic adjustment valve device
KR101472062B1 (en) * 2013-09-04 2014-12-16 재단법인한국조선해양기자재연구원 A relief valve with a test gag

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