KR200408408Y1 - Safety Valve Test Tool - Google Patents

Abstract

The present invention relates to a safety valve check device.

The present invention is a safety valve inspection device for checking the safety valve used to prevent breakage of hydraulic equipment, equipment and piping, pressure generating unit, pressure generating pressure to check and set the popping pressure of the safety valve A high pressure generator including a valve device for controlling the pressure generated in the generation unit, a control panel for controlling the valve device, a pressure transmitter for measuring pressure, and a gauge for displaying the measured pressure; A test bench including a top plate configured to detach and fix the safety valve from the apparatus, a first high pressure input tube fixed to a lower portion of the top plate to transfer pressure to the safety valve, a bottom plate supporting the top plate, and a support; And it provides a safety valve check device comprising a high pressure hose for transmitting the pressure generated in the high pressure generator to the test bench.

According to the present invention, safety valves and relief valves that have been outsourced and repaired at the power plant can be self-inspected, and can also be used for leak testing of general valves, which greatly contributes to the improvement of in-house technology and significantly shortens the maintenance period. In addition, facility reliability is secured and maintenance costs are reduced.

Safety valve, relief valve, high pressure generator

Description

Safety valve test device {Safety Valve Test Tool}

1 is a configuration diagram of a high pressure generator according to a preferred embodiment of the present invention,

2 is a perspective view of a high pressure generator according to a preferred embodiment of the present invention,

3 is a perspective view of a test bench according to a preferred embodiment of the present invention,

4 is a perspective view of a test flange according to a preferred embodiment of the present invention,

5 is an embodiment of using a test plate according to the present invention,

Figure 6a is a perspective view of the adapter and cover flange according to a preferred embodiment of the present invention,

Figure 6b is a preferred use of the adapter and cover flange according to the present invention.

<Description of Symbols for Main Parts of Drawings>

100: high pressure generator 105: test valve

110: pressure transmitter 120: controller

130: register 140: pneumatic water pump

150: water tank 160: regulator

165: manual water pump 170: nitrogen gas reservoir

175: drain valve 180: nitrogen gas valve

185: solenoid valve 190: pneumatic water pump valve

195: manual water pump valve 197: isolation valve

210: selector switch 220: water supply line

230: pressure gauge 240: first wheel

250: control panel 300: test bench

310: groove 320: the first high-pressure input tube

330: top plate 340: bottom plate

350: support 360: second wheel

400: test flange 410: second high pressure input tube

500: test plate 600: adapter

610: cover flange

The present invention relates to a safety valve check device. More specifically, gauges and recorders are provided to easily check the popping pressures of relief valves and safety valves, selector switches for manual and automatic operation in relation to pressure rise, and various dimensions with a single test plate. 2 or more O-rings to test the valves of the vehicle, wheels to transfer freely in the field, and to check at the point where the valve is mounted without moving the valve to eliminate the inconvenience of the transfer of the valves It relates to a safety valve inspection device having a test flange so that it can be.

Typically, power plant equipment includes a number of valves to regulate and shut off the amount of fluid. The valves used in power plants are gate valves and glove valves that block and release the flow of fluids by reducing or widening the cross-sectional area of the pipes. Check Check valve, a valve that limits the maximum pressure. When the pressure exceeds the set pressure, the safety valve or circuit pressure prevents damage to equipment or piping by discharging or returning the fluid and lowering it below the set pressure. When the set pressure is reached, a relief valve or the like which is a pressure control valve for discharging part or all of the fluid to maintain the pressure in the circuit below the set pressure.

In particular, safety valves and relief valves are used to prevent damage to the equipment and piping due to excessive pressure in equipment including hydraulic equipment, pneumatic equipment and steam equipment and are referred to as safety valves.

These valves must be periodically tested for maximum pressure regulation and performance to ensure correct operation during plant operation. However, at present, all the valves are separated from the power generation facility and taken out to the outside for consignment maintenance, and after completion of consignment maintenance, it is not possible to confirm the abnormality of the valves arriving at the site. There was a problem that the pressure set point was changed during the field transfer process after the consignment maintenance.

In order to solve this problem, the present invention includes a gauge and a recorder to easily check the popping pressure of the relief valve and the safety tee valve, and a selection switch to enable manual and automatic operation in relation to the pressure rise. Two test plates are provided with two or more O-rings to test valves of various dimensions, wheels for freely transporting in the field, and valves are not transported to eliminate valve inconvenience. The object is to provide a safety valve inspection device with a test flange for inspection at the mounting point.

In order to achieve this object, the present invention, in the safety valve check device for checking the safety valve used to prevent damage to the equipment and piping system due to excessive pressure in the equipment, including hydraulic equipment, pneumatic equipment and steam equipment, Pressure generator to generate pressure to check and set the popping pressure of the valve, valve device to control the pressure generated from the pressure generator, control panel to control the valve device, pressure transmitter to measure pressure, measured A high pressure generator including a gauge indicating a pressure; A test bench including a top plate configured to detach and fix the safety valve from the apparatus, a first high pressure input tube fixed to a lower portion of the top plate to transfer pressure to the safety valve, a bottom plate supporting the top plate, and a support; And it provides a safety valve check device comprising a high pressure hose for transmitting the pressure generated in the high pressure generator to the test bench.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals have the same reference numerals as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a configuration diagram of a high pressure generator according to a preferred embodiment of the present invention, Figure 2 is a perspective view of a high pressure generator according to a preferred embodiment of the present invention.

The high pressure generator 100 is operated by receiving compressed air, water, nitrogen gas and power. Applying power to the high pressure generator 100 and injecting water or nitrogen gas pressure into the valve under test to adjust the set pressure of the safety valve and relief valve, test whether it operates according to the set pressure, and detect all valves for leakage. do.

When the fluid flowing through the safety valve and the relief valve exceeds the set pressure, the fluid is discharged or returned to the outside of the valve to maintain a constant pressure. The time of discharging or returning the fluid beyond the preset pressure is called a popping point. do. In order to observe this popping point, increase the pressure up to 80-90% of the required pressure using nitrogen gas or water, and then finely adjust the pressure up to the final popping pressure by using a manual water pump 165. Check the final popping point.

The pressure transmitter 110 is a device that changes the pressure as an electrical signal and detects the pressure change in the range of 0 to 400 kg / cm ² so that the pressure can be checked digitally relatively easily and the pressure is controlled by the controller 120. Input the signal and recorder (Recoder, 130) receives the pressure signal and records the pressure change and the popping pressure.

The Air Driven Hydro Pump (140) is a water pump operated by air pressure of 6 kg / cm 2, which is used to provide pressure when testing the safety and relief valves that control the fluid. The pressure of the water discharged from the pneumatic water pump 140 by adjusting the pressure of the air supplied to the pneumatic water pump 140 by sucking the water in the water tank (150) provided inside the high pressure generator (100) The pressure is controlled by the regulating regulator (160) and the pressure can be increased up to 350 kg / ㎠, and the manual water pump (Manual Hydro Pump, 165) of the safety valve and relief valve by the pneumatic water pump (140) After increasing the pressure to 80 ~ 90% of the set pressure, using the manual water pump (165) when the pressure near the safety valve and relief valve when the pressure is increased manually and used to check the popping point It is a manual pump.

The water tank 150 is a storage tank for supplying the water for operation to the pneumatic water pump 140. A sight glass is installed on the outside to check the level. Drain by opening the drain valve (175).

Nitrogen gas is used to provide pressure when testing the safety and relief valves that control the gas.

The high pressure generator 100 is a nitrogen gas storage container 170, a nitrogen gas valve 180 used to supply and shut off nitrogen gas, a solenoid valve for supplying and blocking air for driving the pneumatic water pump 140 ( 185, a pneumatic water pump valve 190 for supplying and blocking the pressure generated by the pneumatic water pump 140, a manual water pump valve 195 for supplying and blocking the pressure generated in the manual water pump valve 165, Isolation Valve, which supplies and shuts off the tested valve and the drain valve 175 for removing residual pressure inside the high-pressure generator 100 after completion of the valve test, and the valve for testing the pressure of nitrogen gas or water in the test. 197). Water or nitrogen gas passing through the isolation valve 197 is externally discharged through a high pressure hose or the like.

The pressure rise of the high pressure generator 100 can be performed automatically and manually. In the case of automatic, the pressure rise rate is changed by adjusting the regulator 160 while the selector switch 210 of the control panel 250 is automatically set. This can change the pressure rise rate to at least 0.2 kg / cm 2. In the case of manual, when the selection switch 210 is manually selected and the air pressure water pump 140 is turned on / off while the regulator 160 is at the maximum position, the pressure is increased initially to rapidly increase the pressure. Used. The water required for the pneumatic water pump 140 is replenished by mounting the water tank 150 inside the high pressure generator 100 through an external water supply line 220. All changes in pressure are transmitted through the pressure transmitter 110 and recorded in the recorder 130, and the pressure can be checked with the naked eye through a separate pressure gauge 230 and a digital gauge, thereby obtaining accurate data through mutual comparison. can do. For the movement of the high-pressure generator 100 in the field to install the first wheel 240 in the lower to be able to move easily.

In order to test the performance of various valves (hereinafter referred to as test valve 105) using the high pressure generator 100, a means for connecting the high pressure generator 100 and the test valve 105 is required.

3 is a perspective view of a test bench according to a preferred embodiment of the present invention, Figure 4 is a perspective view of a test flange according to a preferred embodiment of the present invention, Figure 5 is an embodiment of the use of a test plate according to the present invention.

The test bench 300 includes a groove 310, a first high pressure input tube 320, an upper plate 330, a lower plate 340, a support 350, and a second wheel 360, which are detached from the facility. The test valve 105 is fixed and the pressure generated in the high pressure generator 100 is delivered to the first high pressure input tube 320 through a high pressure hose or the like to apply pressure to the test valve 105.

The test valve 105 having an inner diameter of less than 2 inches is fixed directly to the test bench 300. When testing the test valve 105 of 2 inches or more, the test valve 500 is installed on the test bench 300, and then the test valve Test with (105) fixed. Fixing between the test valve 105 and the test bench 300 is fastened by clamps or bolts and provided with a plurality of grooves 310 radially on the top plate 330 of the test bench 300 to test the size and test of the test valve 105. The valve 105 can be fixed regardless of the position of the bolt hole.

The test bench 300 is a device which completely removes the test valve 105 mounted on the power plant equipment and fixes the test valve 300 to the test bench 300. The test flange 400 performs the test without transferring the test valve 105. Allows for immediate testing at the location where valve 105 is installed. After removing the flange part of the bolt on one side of the test valve 105 installed in the facility, opening the gap between the test valve 105 and the pipe, insert the test flange 400 between the test valve 105 and the pipe and tighten the bolt. After the airtight is maintained, the pressure generated by the high pressure generator 100 is input to the second high pressure input tube 410 through a high pressure hose to apply pressure.

The test plate 500 is a disk having a constant thickness, and a hole is formed at the center for transmitting pressure to the test valve 105. The test bench when inspecting the test valve 105 having a large diameter of 2 inches or more is tested. Put the test on the top plate 330 of (300).

The test bench 300, the test flange 400, and the test plate 500 may be provided with two or more O-rings having the same center but different diameters to test the test valve 105 having two or more different diameters. In addition, the high-pressure generator 100 is capable of checking the popping pressure and setting the pressure of the safety valve and the relief valve, as well as airtight tests of various gate valves, globe valves, and check valves.

Figure 6a is a perspective view of the adapter and cover flange according to a preferred embodiment of the present invention and Figure 6b is a preferred use of the adapter and cover flange according to the present invention.

The adapter 600 is used when testing a test valve 105 having a small inner diameter while using relatively high pressure. After inserting the adapter 600 to the inner circumferential surface of the cover flange 610, the thread formed on the outer circumferential surface of the test valve 105 connected to the pipe and the thread formed on the inner circumferential surface of the adapter are coupled and bolted to the test bench 300 and then tested. .

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention belongs may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas falling within the scope of the present invention should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, the safety valve and the relief valve which have been outsourced and repaired at the power plant can be inspected by themselves, and can also be used for the leak test of general valves, which greatly contributes to the improvement of the technology in the field and the maintenance period. In addition to greatly reducing the cost, the reliability of the facility is secured and maintenance costs are reduced.

Claims (16)

In the safety valve check device for checking the safety valve used to prevent damage to the equipment and piping system due to excessive pressure to the equipment, including hydraulic equipment, pneumatic equipment and steam equipment, Pressure generating unit for generating pressure to check and set the popping pressure of the safety valve, valve device for controlling the pressure generated in the pressure generating unit, control panel for controlling the valve device, measuring the pressure A high pressure generator comprising a pressure transmitter, a gauge indicating the measured pressure; A test bench including a top plate configured to detach and fix the safety valve from the device, a first high pressure input tube fixed to a lower portion of the top plate and transmitting pressure to the safety valve, a bottom plate supporting the top plate, and a support; And High pressure hose to transfer the pressure generated in the high pressure generator to the test bench Safety valve check device comprising a. The method of claim 1, The pressure generator is a safety valve check device, characterized in that for using the air pressure water pump using nitrogen gas and air pressure to generate a pressure for checking the safety valve using a liquid or gas. The method of claim 2, The pneumatic water pump is a safety valve check device, characterized in that for adjusting the pressure of the water by receiving an air pressure of 6 kg / ㎠ to control the air pressure. The method of claim 3, wherein The regulator is safety valve check device characterized in that the pressure can be adjusted in a unit of at least 0.2kg / ㎠. The method of claim 2, And a manual water pump for assisting the pneumatic water pump. The method according to claim 1 or 2, A water tank installed inside the high pressure generator to supply water to the pneumatic water pump; And Water supply line to supply water from outside Safety valve check device characterized in that it further comprises. The method of claim 1, And measuring the pressure change in the pressure transmitter and inputting the pressure to a controller and storing the pressure in a recorder. The method according to claim 1 or 3, The control panel is provided with a selection switch to automatically or manually increase the pressure, but when the pressure is automatically increased safety valve check device, characterized in that for adjusting the pressure increase rate by adjusting the regulator. The method of claim 8, When the pressure is increased by the selection switch manually, the safety valve check device, characterized in that to adjust the regulator to the maximum position and to increase the pressure by turning on / off the pneumatic water pump. The method of claim 1, And a drain valve for removing the pressure after checking the safety valve with the pressure generated by the high pressure generator. The method of claim 1, The lower portion of the high-pressure generator device for safety check, characterized in that provided with a first wheel for the convenience of movement. The method of claim 1, Safety valve inspection device characterized in that a plurality of grooves formed radially on the top plate of the test bench. The method of claim 1, Safety lower inspection device, characterized in that the lower plate of the test bench has a second wheel for convenience of movement. The method of claim 1, A safety valve comprising a second high-pressure input tube for receiving the pressure generated by the high-pressure generator through the high pressure hose, the test flange for checking the safety valve by mounting between the safety valve and the pipe. Inspection device. The method of claim 1, And a test plate positioned on the top plate of the test bench for testing the safety valve having an inner diameter of 2 inches or more. The method according to any one of claims 1, 14 and 15, Safety valve check characterized in that each of the upper plate, the test flange and the center of the test plate of the test bench is provided with a plurality of O-rings of different diameters centering on the hole for transmitting the pressure generated by the high-pressure generator to the safety valve Device.

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