KR20140053649A - Fail action device for anti-surge valve - Google Patents

Fail action device for anti-surge valve Download PDF

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Publication number
KR20140053649A
KR20140053649A KR1020120119842A KR20120119842A KR20140053649A KR 20140053649 A KR20140053649 A KR 20140053649A KR 1020120119842 A KR1020120119842 A KR 1020120119842A KR 20120119842 A KR20120119842 A KR 20120119842A KR 20140053649 A KR20140053649 A KR 20140053649A
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KR
South Korea
Prior art keywords
main
pressure
main line
valve
pneumatic pipe
Prior art date
Application number
KR1020120119842A
Other languages
Korean (ko)
Inventor
김동건
Original Assignee
대우조선해양 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 대우조선해양 주식회사 filed Critical 대우조선해양 주식회사
Priority to KR1020120119842A priority Critical patent/KR20140053649A/en
Publication of KR20140053649A publication Critical patent/KR20140053649A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/02—Surge control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The present invention relates to a device for controlling an operation cylinder (21) installed on a main line (11) with a snap acting relay (23) and a positioner (25) and performing a fail action at the same time and is characterized by including a pressure sensor (30) installed on a main pneumatic pipe (12) connected to both ports of the operation cylinder (21); an upper valve (40) installed to operate the snap acting relay (23) on a control pneumatic pipe (41) branched from the main pneumatic pipe (12); and a controller (50) which operates the upper valve (40) corresponding to a change in the pressure of the main line (11) and the main pneumatic (12) then controls a flow passage of the main line (11). Therefore, the present invention omits an air bottle of which volume is relatively large and complicated pipes and gauges involved with the air bottle, thereby improving the efficiency of designing and producing tasks and reducing costs and a period.

Description

[0001] The present invention relates to an anti-surge valve,

The present invention relates to a fail-action mechanism of an anti-surge valve, and more particularly, to a method and a device for preventing air bubbles, which are relatively bulky, and complicated piping and instruments associated therewith, To a fail-action mechanism of an anti-surge valve capable of shortening the delivery time and reducing the cost.

In general, pneumatic generation systems and fuel gas compression systems mounted on ships and offshore structures handle high pressure and high capacity, so anti-surge valves are used to prevent system damage or destruction due to fluctuations in pressure.

As a related patent, Korean Patent Laid-Open Publication No. 2012-0096748 discloses a compressor which includes a compressor, a main flow passage passing through the compressor, a bypass flow passage bypassing the compressor, and connecting an inlet of the compressor to an outlet of the compressor A valve for controlling opening and closing of the bypass passage, and a flow meter disposed in the bypass passage. Accordingly, it is expected that the stall of the compressor is prevented, and the pressure loss due to the measurement of the flow rate passing through the compressor is prevented.

However, the above-mentioned prior patents have limitations in applying to the protection of high-pressure systems of ships and offshore structures, which is advantageous for miniaturization.

1, an anti-surge valve for opening and closing a flow path is provided on an operation cylinder 21 on a main line 11 for transferring a fluid including compressed air. The anti-surge valve is connected to the main pneumatic tube 12 And is operated using air supplied to the auxiliary pneumatic tube (13). When a fail signal is received from the safety system (not shown), the system is automatically operated to the safety position (valve opening) when the pneumatic supply is interrupted.

At this time, a high-pressure air bottle 16 is installed on the auxiliary pneumatic tube 14 to give a driving force when the pneumatic supply is interrupted. The capacity of the air bottle 16 is relatively large (30L to 120L) , A number of tubing lines, a pressure relief valve (PSV), a pressure gauge (PG), etc. are required, leading to delay in delivery and cost increase.

1. Korean Unexamined Patent Application Publication No. 2012-0096748 entitled " Compression unit with anti-surge logic and multi-stage compression device equipped with the same "(Open date: Aug. 31, 2012)

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above-mentioned problems of the prior art by omitting a relatively bulky air bottle and the complicated piping and instrument accompanying it, thereby increasing the efficiency of design and production work, And to provide a fail action mechanism of an anti-surge valve capable of shortening the delivery time.

In order to achieve the above object, the present invention provides a mechanism for controlling a working cylinder installed on a main line with a snap actuation relay and a positioner and performing a fail action function, the apparatus comprising: a main pneumatic tube connected to both ports of the operating cylinder A pressure sensor installed in the housing; An upstream valve installed to actuate a snap actuation relay on a control pneumatic tube that branches off from the main pneumatic tube; And a controller for operating the upstream valve in response to the pressure fluctuation of the main line and the main pneumatic pipe to intermittently control the flow path of the main line.

According to the present invention, the upstream valve interrupts the exhaust to one port of the operating cylinder simultaneously with the operation of the snap actuation relay.

According to another aspect of the present invention, the controller opens the main line by operating the upstream valve when the pressure of the main line is equal to or higher than the set value or the pressure of the main pneumatic pipe is lower than the set value.

According to the present invention, there is further provided an upstream valve of the same size in series adjacent to the upstream valve so as to correspond exclusively to the pressure fluctuation of the main pneumatic pipe.

As described above, according to the present invention, it is possible to omit a relatively bulky air bottle and the complicated piping and instrument accompanying the same, thereby increasing the efficiency of design and production, reducing the cost and shortening the delivery time have.

1 is a schematic view schematically showing the installation state of a conventional anti-
2 is a view showing a piping connection diagram showing an installation state of an anti-surge valve according to the present invention;

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a mechanism for controlling an actuating cylinder (21) installed on a main line (11) with a snap actuation relay (23) and a positioner (25) while simultaneously performing a fail action function. The main line 11 is intended to be a pipeline for transferring high-pressure air from a pneumatic pressure generator (not shown) of a ship, but is not limited thereto. The anti-surging valve of the ship for the fail action function is based on a double action type operating cylinder 21 and air (pneumatic pressure) supplied to the main pneumatic pipe 12 as a power source is used.

Here, the upstream valve 40 implements the fail safe function through the snap actuation relay 23 and the downstream valve 45 in which an emergency situation may have occurred. The pneumatic pressure transmitted to the port of the double acting type cylinder 21 fluctuates according to the operating position of the snap actuation relay 23 to perform the intermittence of the flow path to the main line 11. [ The positioner 25 receives an external signal and adjusts the opening degree of the valve in proportion thereto. The snap actuation relay 23 and the positioner 25 are actuated by the pneumatic pressure of the control pneumatic pipe 14 connected to branch at the main pneumatic pipe 12.

According to the present invention, a pressure sensor (30) is installed on a main pneumatic pipe (12) connected to both ports of the operating cylinder (21). The main pneumatic tube 12 does not have the auxiliary pneumatic tube 13 and the air bottle 16 as in the conventional art but includes only the filter and the check valve to realize the simplification of the system. The pressure sensor 30 is installed on the main pneumatic tube 12 on the downstream side of the filter and the check valve and generates an electrical signal according to the pressure.

According to the present invention, an upstream valve (40) is provided to operate the snap actuation relay (23) on the control pneumatic pipe (14) branching from the main pneumatic pipe (12). The upstream valve 40 is installed as a solenoid operated valve to control the operating position of the snap actuation relay 23 on the control pneumatic pipe 14.

At this time, the upstream valve (40) interrupts the exhaust to one port of the operating cylinder (21) simultaneously with the operation of the snap actuation relay (23). When the operating cylinder 21 is divided into an upper space and a lower space, a downstream valve 45 is installed at a discharge port of the upper space. The downstream valve 45 is engaged with the operation of the upstream valve 40 in the same manner as the snap actuation relay 23 to perform exhaust for the upward operation of the operating cylinder 21. [

The present invention also includes a controller 50 that operates the upstream valve 40 in response to the pressure fluctuation of the main line 11 and the main air line 12 to control the flow path of the main line 11 . The controller 50 receives the signal from the pressure sensor 30 and changes the output voltage for the upstream valve 40 from DC 24V to OV if the air pressure of the main pneumatic pipe 12 is determined to be less than the set value The flow path of the main line 11 is changed to the set state.

At this time, the controller 50 operates the upstream valve 40 to open the main line 11 when the pressure of the main line 11 is higher than the set value or the pressure of the main pneumatic pipe 12 is lower than the set value . The controller 50 judges that a surge occurs in the main line 11 to cause the pressure to exceed the set value or the air to be supplied to the main pneumatic pipe 12 to be insufficient, The operation position of the snap actuation relay 23 and the downstream valve 45 is changed so that air is discharged from the upper space of the operating cylinder 21 and air is supplied to the lower space of the operating cylinder 21 And the flow path of the main line 11 is opened.

Reference numeral 27 denotes a volume booster which is provided to assist the quick operation of the operating cylinder 21 when the distance between the operating cylinder 21 and the snap actuation relay 23 is large or the capacity of the operating cylinder 21 is large.

On the other hand, upstream valves (40 ') of the same standard may be provided in series adjacent to the upstream valve (40) so as to correspond exclusively to pressure fluctuations of the main pneumatic pipe (12). Although the present invention has been described with respect to a pneumatic generator of a ship, considering the case where the pneumatic pressure generator is installed in another system, a plurality of upstream valves 40 and 40 'may be provided. For example, when the pressure of the main line 11 is equal to or higher than a set value, the upstream valve 40 of one side can be configured to operate the upstream valve 40 'of the other side when the pressure of the main pipe 12 is equal to or lower than the set value.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. It is therefore intended that such variations and modifications fall within the scope of the appended claims.

11: main line 12: main pneumatic tube
13: auxiliary pneumatic tube 14: control pneumatic tube
16: air bottle 21: working cylinder
23: Snap actuation relay 25: Positioner
27: Volume booster 30: Pressure sensor
40, 40 ': Upstream valve 45: Downstream valve
50:

Claims (4)

A mechanism for controlling an actuation cylinder (21) provided on a main line (11) by means of a snap actuation relay (23) and a positioner (25)
A pressure sensor (30) installed on a main pneumatic tube (12) connected to both ports of the operating cylinder (21);
An upstream valve (40) installed to operate the snap actuation relay (23) on the control pneumatic pipe (14) which branches off from the main pneumatic pipe (12); And
And a controller 50 for operating the upstream valve 40 in response to pressure fluctuations of the main line 11 and the main pneumatic pipe 12 to intermittently flow the flow of the main line 11. [ Failure mechanism of anti surge valve. The method according to claim 1,
Wherein the upstream valve (40) interrupts the exhaust to one port of the operating cylinder (21) simultaneously with the operation of the snap actuation relay (23). The method according to claim 1,
The controller 50 operates the upstream valve 40 to open the main line 11 when the pressure of the main line 11 is higher than the set value or the pressure of the main pneumatic pipe 12 is lower than the set value Failure mechanism of anti-surge valve. The method according to claim 1,
Further comprising an upstream valve (40 ') of the same size in series adjacent to the upstream valve (40) so as to correspond exclusively to pressure fluctuations of the main pneumatic pipe (12) .
KR1020120119842A 2012-10-26 2012-10-26 Fail action device for anti-surge valve KR20140053649A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120119842A KR20140053649A (en) 2012-10-26 2012-10-26 Fail action device for anti-surge valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120119842A KR20140053649A (en) 2012-10-26 2012-10-26 Fail action device for anti-surge valve

Publications (1)

Publication Number Publication Date
KR20140053649A true KR20140053649A (en) 2014-05-08

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KR1020120119842A KR20140053649A (en) 2012-10-26 2012-10-26 Fail action device for anti-surge valve

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110637163A (en) * 2017-04-21 2019-12-31 压缩机控制公司 System and method for detecting degradation of control valve performance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110637163A (en) * 2017-04-21 2019-12-31 压缩机控制公司 System and method for detecting degradation of control valve performance

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