KR101783563B1 - Safety Valve Test apparatus - Google Patents

Abstract

The present invention relates to a safety test device for an industrial facility, A hydraulic pump having a control valve for transmitting a hydraulic pressure to a hydraulic jack for raising an operation rod of a safety valve and controlling a flow rate; A pressure sensor for measuring the discharge pressure of the hydraulic pump; A load cell for converting a load applied between the operation rod of the safety valve and the hydraulic jack into an electrical load signal; An operating rod sensing means for sensing when the operating rod rises above a set height; A control valve of the hydraulic pump is controlled so that the discharge pressure sensed by the pressure sensor linearly reaches a preset applied pressure, and when the movement of the operation rod is sensed by the operation rod sensing means, And data processing means for stopping the driving of the hydraulic pump and converting the pressure signal into pressure when the load signal is inputted from the load cell, and converting the pressure into a pressure graph with respect to time. The safety test apparatus of the industrial facility according to the present invention carries out the pumping test without separating the safety valve from the facility or the apparatus of the field. The discharge pressure of the hydraulic pump is sensed through the pressure sensor, By controlling linearly so as to reach the applied pressure, it is possible not only for a novice such as a novice to easily test the safety side, but also when the operation load detecting means detects the flapping, the driving of the hydraulic pump is stopped, Or the failure of the hydraulic pump.

Description

{Safety Valve Test apparatus}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a safety testing device for an industrial facility, and more particularly to a safety testing device for an industrial facility that popping is performed at a set pressure without separating a safety valve installed in various industrial equipment or devices such as a power plant, The present invention relates to a test apparatus for a safety test of industrial equipment capable of testing a test apparatus.

In general, safety valves are installed in pressure vessels and piping of industrial facilities such as power plants, chemical plants, refineries, incinerators, etc., to safeguard devices and facilities even if abnormal pressure occurs in each component.

Such a safety valve is used in various industrial fields such as a power plant operated by high-pressure and low-pressure gas, a high-pressure gas production facility, a petrochemical facility, a boiler and the like. It is stipulated to install mandatory by high pressure gas related regulations in order to prevent explosion or cracking of device or equipment in advance to protect devices and equipment.

On the other hand, a large-scale plant facility includes a large number of valves for controlling and blocking the amount of fluid, and the valves used in the power plant are usually designed to reduce or broaden the cross- A gate valve and a glove valve to prevent backflow of fluid and a check valve to flow only in one direction and a valve that limits the maximum pressure. (Safety Vent) to prevent damage to the equipment or piping by lowering the pressure to below the set pressure. When the pressure of the circuit reaches the set pressure, part or all of the fluid is discharged to keep the pressure in the circuit below the set pressure. And a relief valve (Relief Valve) which is a pressure control valve.

In order to confirm whether or not the safety valve that plays an important role in the operation of the large-scale facility is popping, it is necessary to confirm whether or not the valve is periodically popped. And then tested.

In this case, when the safety test is performed on the safety side, there is a problem that the safety side is separated from the site and the test side is transported to another test site equipped with the test equipment, and then the test is carried again.

Of course, a device capable of directly testing on the spot without separating such a safety valve has been proposed in Japanese Patent No. 10-0864273. The present invention relates to an apparatus for testing a set pressure of a safety valve, and more particularly, to an apparatus for testing whether a safety valve used as a working pressure in a facility to be tested is popped at a set pressure, And a pressure conversion unit for converting the pressure or the load applied by the connection member between the operating rod and the pressing unit into an electrical output signal, The load cell as the pressing means and the conversion means is connected to a recorder for recording an electrical output signal as data, and the recorder has a pressure or load applied at a time when the safety valve is popped, Are simultaneously recorded as data and displayed on the display unit It shall be.

However, the conventional set pressure test apparatus for a safety valve proposed in the above-mentioned patent application is a structure for manually operating a hydraulic pump constituting the pressurizing means and applying a pressure or a load, wherein the pressure applied through the hydraulic pump is constant There is a problem that the waveform of data output to the display unit of the recorder is not constant. That is, since the pressure of the control lever or the like provided on the pressure means is manually adjusted by an appropriate force, it is difficult to adjust the pressure and thus it is difficult for the novice inspector to perform the safety valve test. Also, the waveform of the graph of the measured pressure is not constant, and it is difficult to measure more precisely the point of time when the waveform is tapped.

In addition, even if the information on the operating pressure of the equipment under test is secured in advance, there is a difference from the operating pressure at the time when the actual operating pressure is changed in real time, There is also a problem.

In addition, if the inspector does not stop the operation of the hydraulic pump even after the operation rod has been operated, the hydraulic pump is continuously driven. Therefore, the safety valve, the load cell or the hydraulic pump is also likely to be broken when the pressure is applied.

Accordingly, it is an object of the present invention to provide a hydraulic pump capable of linearly inducing an applied pressure while testing whether a surface is flapping at a predetermined pressure without separating a safety valve from a facility or an apparatus in the field. And to stop the driving of the hydraulic pump when the safety flapping is performed.

In addition, the present invention provides a method of controlling the hydraulic pressure of the hydraulic pump by receiving information on the operation pressure of the fluid flowing in the facility or the apparatus installed in the safety field from the control server of the control center in real time, Another object of the present invention is to provide a safety test device for an industrial facility capable of ensuring the reliability of the safety test by reflecting operating pressure.

In order to solve such a technical problem,

A hydraulic pump having a control valve for transmitting a hydraulic pressure to a hydraulic jack for raising an operation rod of a safety valve and controlling a flow rate; A pressure sensor for measuring the discharge pressure of the hydraulic pump; A load cell for converting a load applied between the operation rod of the safety valve and the hydraulic jack into an electrical load signal; An operating rod sensing means for sensing when the operating rod rises above a set height; A control valve of the hydraulic pump is controlled so that the discharge pressure sensed by the pressure sensor linearly reaches a preset applied pressure, and when the movement of the operation rod is sensed by the operation rod sensing means, And a data processing means for stopping the driving of the hydraulic pump and converting the pressure signal into pressure when the load signal is inputted from the load cell and converting the pressure to a time pressure graph for display, .

The data processing unit controls the hydraulic pump to linearly reach a predetermined applied pressure when the discharge pressure of the hydraulic pump sensed through the pressure sensor is input. When a load signal of the load cell is input, And the data processing means displays the temperature, humidity, and air pollution degree information sensed through the air pollution sensor for measuring the air pollution degree, the temperature sensor for measuring the temperature, the humidity sensor for measuring the humidity, Are displayed together.

The data processing means stores the measured pressure in a memory at a preset time interval, compares the measured pressures in order, and when a maximum value is found, it determines that the measured pressure is a fapping pressure, and the fapping pressure is output together with the graph .

At this time, the data processing means sequentially compares the measurement pressures stored in the memory, selects a large value as the temporary pumping pressure, finalizes the final temporary pumping pressure as the pumping pressure, and displays the numerical value together with the graph.

The data processing means controls the hydraulic pump by setting a value obtained by subtracting the operation pressure from a set pressure at which the safety valve is popped, when the operation pressure of the facility or the apparatus equipped with the safety valve is inputted.

The data processing means may be connected to the control server of the control center for monitoring and controlling the equipment or the apparatus equipped with the safety valve through a wired or wireless network so that the data processing means may be connected to the control server, When the information on the safety side such as the installation location, the model name, the cross-sectional area, and the like is inputted and received, the operation pressure of the facility or the apparatus having the specific safety valve installed from the control server is received in real time. ; The data processing means stores the puffing test data of a specific safety level in the memory when the test for the specific safety level is completed and transmits the puffing test data to the control server and registers the data in the database of the control server.

The safety test apparatus of the industrial facility according to the present invention carries out the pumping test without separating the safety valve from the facility or the apparatus of the field. The discharge pressure of the hydraulic pump is sensed through the pressure sensor, By controlling linearly so as to reach the applied pressure, it is possible not only for a novice such as a novice to easily test the safety side, but also when the operation load detecting means detects the flapping, the driving of the hydraulic pump is stopped, Or the failure of the hydraulic pump.

In addition, the present invention provides information on the operating pressure of a fluid flowing in a facility or a device installed on a safety valve in a pumping test in real time from the control server of the control center to reflect the control pressure in the hydraulic pump, can do.

In addition, by transmitting the papping test data of the safety side to the control server by registering the papping test data after the test, the reliability of the test result is improved because there is no fear of data management and data manipulation.

1 is a view illustrating the installation of a safety test device for an industrial facility according to an embodiment of the present invention.
2 is a control block diagram of a safety test device for an industrial facility according to an embodiment of the present invention.
3 is a control block diagram of a safety test device for an industrial facility according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

1 and 2, the safety testing device for an industrial facility according to an embodiment of the present invention is a device for testing a safety valve of an industrial facility, The pressure of the hydraulic pump 10 for inducing the set pressure is linearly increased in proportion to the time, and the safety valve 1 is tested. If the popping is detected, It is possible to stop the driving of the safety valve 10 and to prevent the failure of the safety valve 1, the load cell or the hydraulic pump 10 due to excessive pressure input.

The present invention is intended to test whether a safety valve (1) installed in a piping or a facility such as a pressure vessel or a pipe of a large scale apparatus or facility such as a power plant, an incineration plant, a chemical plant or an oil refinery is popped at a set pressure, A hydraulic pump 10 having a control valve 10a for transmitting hydraulic pressure to a hydraulic jack 12 for raising the operating rod 2 of the hydraulic pump 1 and controlling the flow rate; A pressure sensor (20) for measuring the discharge pressure of the hydraulic pump (10); A load cell 30 for converting a load applied between the operating rod 2 and the hydraulic jack 12 of the safety valve 1 into an electrical load signal; An operating rod sensing means (35) for sensing when the operating rod (2) rises above a set height; Controls the control valve (10a) of the hydraulic pump (10) such that the discharge pressure sensed by the pressure sensor (20) linearly reaches a preset applied pressure, and the operation load sensing means (35) 2) is detected, it is determined that the operation of the hydraulic pump 10 is completed and the driving of the hydraulic pump 10 is stopped. When a load signal is inputted from the load cell 30, the pressure is converted into a pressure, And data processing means (40).

Hereinafter, the constitution of each part of the present invention will be described in detail.

First, the safety valve 1 is installed in a facility or an apparatus such as a power plant, a high-pressure gas production facility, a petrochemical facility, a boiler, etc. In order to test the safety valve 1, a valve cap (not shown) The jig 4 provided with the hydraulic jack 12 is mounted on the safety valve 1 and the hydraulic jack 12 and the adapter 3 are attached to the load 3 (30).

The hydraulic pump 10 for supplying the hydraulic pressure to the hydraulic jack 12 can control the discharge pressure of the hydraulic pump 10, that is, the hydraulic pressure transmitted to the hydraulic jack 12, in accordance with the control signal of the data processing means 40 .

To this end, the hydraulic pump 10 is provided with a control valve 10a to control the flow rate in accordance with the control signal of the data processing means 40. [

The pressure sensor 20 is installed on the hydraulic line 11 connecting the hydraulic pump 10 and the hydraulic jack 12 to measure the discharge pressure of the hydraulic pump 10 and the pressure sensor 20 ) Is input to the data processing device 40. The data processing device 40 is connected to the data processing device 40,

The load cell 30 converts a load applied between the actuating rod 2 and the hydraulic jack 12 of the safety valve 1 into an electrical load signal and the load signal is input to the data processing means 40.

At this time, the control signal of the hydraulic pump 10 output from the data processing means 40 is converted into an analog signal through the interface means 50 as a digital signal to control the hydraulic pump 10 The discharge pressure sensed by the pressure sensor 20 and the electrical load signal of the load cell 30 are converted into a digital signal through the interface means 50 as an analog signal and input to the data processing means 40 do.

Therefore, the interface means 50 includes an A / D converter for converting an analog signal into a digital signal and a D / A converter for converting a digital signal into an analog signal, and also performs a function of signal distribution.

The interface means 50 is connected to the data processing means 40. The data processing means 40 may be a laptop computer or a tablet PC which can be carried on the field as well as a normal industrial computer. In particular, when the interface means 40 is a notebook or a tablet PC, the data processing means 40 can be connected by a USB cable and can be easily connected by a plug and play (P & P) method.

A limit switch which is an operating rod sensing means 35 is installed on the jig 4 provided with the hydraulic jack 12 so as to detect when the operating rod 2 rises above a predetermined height, So that a signal is generated. Of course, the limit switch may be provided separately on the upper side of the safety valve 1 located on the lower side of the load cell 30, or may be provided with a limit switch as the working rod sensing means 35 on one side of the working rod 2 Do.

Therefore, when the operating rod 2 rises above the set height, the operating rod sensing means 35 directly senses it, and in this case, it can be determined as the time of the papping. This means that if the operation sensing signal is inputted from the working load sensing means 35 in the data processing means 40, it is judged that the flapping has occurred and the driving of the hydraulic pump 10 is stopped.

On the other hand, measurement of temperature and humidity related to the environment of equipment such as the power plant, high-pressure gas production facility, petrochemical facility, boiler, or the like is also a factor that can cause errors in the test. To this end, the safety testing device of the industrial facility of the present invention further includes a temperature sensor 37 for measuring ambient temperature, a humidity sensor 38 for measuring humidity, and an air pollution sensor 39 for measuring air pollution degree. Through this, it is possible to observe the monitoring information on the safety side (1) installation environment where the test is performed, and to perform comprehensive monitoring of the surrounding environment in which the safety side is installed.

In this case, the temperature sensor 37, the humidity sensor 38 for measuring the humidity, and the air pollution sensor 39 for measuring the air pollution degree are converted into digital data through the interface means 50 in the case of the analog system, The data may be directly input to the data processing means 40 in the case of the digital system.

The temperature, humidity, and air pollution information of the surroundings where such safety valve is installed is displayed together with the pressure graph.

Hereinafter, an operation procedure of a safety test device for an industrial facility according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG.

According to the above configuration, the inspector inputs the set pressure of the facility or equipment in which the safety valve 1 is installed and safety-side information such as the installation position, model name, and cross-sectional area of the safety valve 1 by using the notebook computer as the data processing means 40 , The control signal is applied to drive the hydraulic pump 10.

In this case, when the discharge pressure of the hydraulic pump 10 sensed through the pressure sensor 20 is inputted, the data processing means 40 controls the hydraulic pump 10 to linearly reach a predetermined applied pressure .

At this time, for example, when the set applied pressure is 100 kg / cm 2, the discharge pressure of 10 kg / cm 2 can be controlled to be outputted so that the operation pressure can be set to reach the set pressure set at 10 seconds. In this way, by operating the discharge pressure to linearly increase in proportion with time, it is possible to test a plurality of safety valves (1) under the same conditions. It goes without saying that the setting of the applied pressure and the adjustment of the discharge pressure can be set and adjusted under various conditions.

The hydraulic pressure is applied to the hydraulic jack 12 so that the load is applied in the direction in which the operation rod 2 of the safety valve 1 is to be elevated. The load cell 30 is connected to the operation rod 2 of the safety valve 1, And outputs the converted electric load signal to the data processing means 40. The data processing means 40 receives the electric load signal and outputs the electric load signal.

When the load signal of the load cell 30 is input, the data processing unit 40 divides the load signal by the area of the corresponding safety valve 1 to calculate the measured pressure and displays the measured pressure on a graph.

At this time, the graph of the measured pressure is stored in the memory 41 of the data processing means 40, which can be used as test data by extracting the puffing test data of a certain safety level through data back-up. In this case, it can be judged as normal when the measurement pressure is within the tolerance range (for example, ± 5% range of the set pressure) based on the set pressure, which is the pressure that the safety valve (1) In this case, the measured pressure is lowered after obtaining the peak value immediately before the pumping.

On the other hand, there is a large error in confirming the graph with the naked eye and securing the numerical value of the popping pressure. The data processing means 40 stores the measured pressure in the memory 41 at a set time interval (for example, 1/1000 second), compares the measured pressures in order, and when the maximum value is found, And outputs it along with the graph. That is, for example, assuming that measured pressures P1 to P5 are measured in units of 1/1000 second, if P1 and P2 are compared, if P2 is larger, P2 is judged to be a temporary popping pressure and P2 and P3 are compared. If it is larger, P3 is judged as a temporary popping pressure. Thereafter, P3 and P4 are compared in the same manner, and if P3 is larger, P3 is still judged as a temporary pumping pressure and compared with P5. That is, the plurality of measured pressures are sequentially compared to calculate the temporary flapping pressure, and finally the remaining temporary flapping pressure is determined as the flapping pressure. By displaying the above-described flapping pressure numerically and displaying it together with the graph, objectivity and accuracy can be secured as compared with the naked eye checking of the flapping pressure.

The operating pressure may be input to the data processing means 40 beforehand so as to reflect the operation pressure of the facility or the apparatus provided with the safety valve 1, It is possible to control the hydraulic pump 10 by setting a value obtained by subtracting the operating pressure of the equipment or the apparatus provided with the safety valve 1 from the set pressure at which the valve 1 is popped. This makes it possible to set the applied pressure automatically according to the situation of the site, and to perform more accurate pumping test. For example, if the set pressure is 200 kg / cm 2 and the operating pressure of the equipment or apparatus equipped with the safety valve 1 is 90 kg / cm 2, the applied pressure is 110 kg / cm 2, Cm < 2 >.

On the other hand, the data processing means 40 analyzes the extracted test data to calculate the tapping pressure. At this time,

When the load signal of the load cell 30 is inputted, the data processing means 40 divides the load signal by the area of the corresponding safety valve 1 to calculate the measured pressure and displays the measured pressure on a graph.

The temperature, humidity, and air pollution degree information of the temperature sensor 37, the humidity sensor 38, and the air pollution sensor 39 for monitoring the surrounding environment of the safety valve 1 are also displayed together with the graph.

3 is a control block diagram of a safety test device for an industrial facility according to another embodiment of the present invention. 1 and 2, the data processing means 40 includes a control server 62 of the control center 60 for monitoring and controlling the facility or the apparatus provided with the safety valve 1, It is connected via a wired or wireless network.

In this case, data communication between the data processing means 40 and the control server 62 may be connected to various known configurations. For example, when the data processing means 40 is a laptop, the data processing means 40 may be connected to the control server 62 of the control center 60 via a local area network or by using a tethering function of a smart phone capable of separate remote communication, ) And the control server (62).

The control server 60 of the control center 60 via the data processing means 40 to input safety information such as the installation position, model name, and cross-sectional area of the specific safety valve 1 to be tested The control server (62) of the control center (60) receives the operating pressure of the equipment or the apparatus having the specific safety valve (1) in real time, and adjusts the applied pressure in real time by reflecting the operating pressure.

That is, the data processing means 40 receives the operating pressure in real time and sets a value subtracted from the set pressure as the applied pressure to control the hydraulic pump 20 so that even if the applied pressure fluctuates, it is detected by the load cell 30 It is possible to increase the reliability of the flapping test by allowing the converted measured pressure to rise and rise constantly.

The data processing means 40 stores the puffing test data of the specific safety level in the memory when the test for the specific safety level 1 is completed and transmits the test data to the control server 62 of the control center 60, 60 can be registered and managed in the database 62a.

Although the embodiments of the present invention have been described in detail in the foregoing, the scope of the present invention is not limited thereto, and the scope of the present invention extends to substantially the same range as the embodiments of the present invention.

1: Safety valve 2: Operational rod
10: Hydraulic pump 10a: Control valve
12: Hydraulic jack 20: Pressure sensor
30: load cell 35: working load sensing means
37: temperature sensor 38: humidity sensor
39: air pollution sensor 40: data processing means
41: memory 50: interface means
60: control center 62: control server
62a: Database

Claims (6)

A hydraulic pump (10) having a control valve (10a) for transmitting hydraulic pressure to a hydraulic jack (12) for elevating an operating rod (2) of a safety valve (1) and controlling the flow rate; A pressure sensor (20) for measuring the discharge pressure of the hydraulic pump (10); A load cell 30 for converting a load applied between the operating rod 2 and the hydraulic jack 12 of the safety valve 1 into an electrical load signal; An operating rod sensing means (35) for sensing when the operating rod (2) rises above a set height; Controls the control valve (10a) of the hydraulic pump (10) such that the discharge pressure sensed by the pressure sensor (20) linearly reaches a preset applied pressure, and the operation load sensing means (35) 2) is detected, it is determined that the operation of the hydraulic pump 10 is completed and the driving of the hydraulic pump 10 is stopped. When a load signal is inputted from the load cell 30, the pressure is converted into a pressure, And data processing means (40)
The data processing means 40 controls the hydraulic pump 10 to linearly reach a preset applied pressure when the discharge pressure of the hydraulic pump 10 sensed through the pressure sensor 20 is input, When the load signal of the load cell 30 is inputted, the measured pressure is divided by the area of the safety valve 1 to display the measured pressure,
The data processing means 40 is connected to the control server 62 of the control center 60 for monitoring and controlling the facilities or devices provided with the safety valve 1 via a wired or wireless network, (1) that is required to be tested by connecting to the control server (62) in the control server (62), the control server (62) Controls the hydraulic pump 20 by setting a value obtained by subtracting the pressure from the set pressure as an applied pressure,
The data processing means 40 stores the puffing test data of a specific safety level in the memory when the test for the specific safety level 1 is completed and sends the puffing test data to the control server 62 to transmit the puffing test data to the control server 62, (62a) of the industrial facility (1).
The method according to claim 1,
The data processing means 40 includes a temperature sensor 37 for measuring temperature, a humidity sensor 38 for measuring humidity, and a temperature, humidity and air pollution degree information sensed through an air pollution sensor 39 for measuring the air pollution degree Is displayed together with the test result.
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