KR20120094325A - Method for testing the interior of pipe prover - Google Patents

Abstract

PURPOSE: A method for inspecting the inside of a pipe prober is provided to grasp a location of a sphere moving in the inside of a pipe prober, thereby confirming the existence of the operation of a director sensor, and a sphere sizing state. CONSTITUTION: A method for inspecting the inside of a pipe prober is as follows. A mixed solution of antifreeze and water and a steel powder and magnet segments are put in the inside of the sphere and a sphere sizing is performed. The sized sphere is put into a head unit of a pipe prober(20) and a fluid is dropped. A magnetic sensor and a detector sensor transmit signals according to an order that the sphere passes by a flow of the fluid. The existence of abnormity in the inside of the pipe prober is determined with signals of the magnetic sensor and the detector sensor.

Description

Method for testing the interior of pipe prover}

The present invention relates to a method for inspecting the inside of a pipe prober by detecting the position of a sphere used in a pipe prover. The present invention relates to a method of inspecting the inside of the pipe prober for the convenience of pipe prober calibration and maintenance, such as checking the state of the sphere and the operation of the detector sensor inside the pipe probe.

It is mandatory that a meter checks (tests) and corrects whether a metering precision exists in a fixed range in a fixed period.

The flowmeter used for trading purposes was very important for the accuracy of the measurements, and the accuracy was verified by comparison with the reference volume. There are several methods for comparing with the reference volume, but related to the present invention is a method using a pipe prober.

This method connects a pipe prober having a reference volume and a flow meter to be calibrated (hereinafter referred to as a flow meter under test) in series, so that a volume of fluid substantially equal to the reference volume discharged when the exerciser moves a predetermined section in the measuring tube section. To calibrate the meter under test. Here, if the instrument error is E, the volume (flow rate) measured by the flow meter under test is I, and the reference volume of the pipe probe is Q,

E = (I-Q) / Qx100%

Can be obtained as

Pipe probes are largely divided into uni-directional pipe provers and bi-directional pipe provers.

Herein, the bidirectional pipe prober will be described with reference to FIG. 1.

The pipe prober has a base volume pipe 2b with a reference volume. In this base volume pipe 2b, two detector sensors D1 6b and D2 7b are provided, and at both ends of the base volume pipe 2b, a header formed with a diameter larger than the diameter of the base volume pipe 2b. The parts 9a and 9b are provided, respectively.

The pipe prober has a test flow meter (not shown) attached to either one of the inlet pipe 3b and the outlet pipe 4b. When the four-way valve 9c moves, the inlet pipe 3b serves as an outlet. Outlet piping 4b can serve as an inlet.

 Then, the four-way valve 9c is operated to change the flow direction of the fluid, for example, while the inlet pipe 3b on the side to which the flow meter under test is attached and the header portion 9a are connected to each other. The outlet pipe 4b and the header portion 9b are connected to each other. At this time, the base volume pipe 2b and the header portion 9a are held in a liquid-tight manner before the flow direction is switched, and the header portion 9a moves from the base volume pipe 2b to the liquid. On sphere 5b is arrange | positioned previously.

Then, the fluid flowing into the header portion 9a gradually increases the flow rate as the valve opening degree of the four-way valve 9c increases, and finally reaches a predetermined flow rate, thereby having a predetermined flow rate with the fluid. The spear 5b makes an interval movement between D1 6b-> D2 7b in the base volume pipe 2b, and measurement is performed, and the spear 5b continues to reach the header part 9b.

Subsequent measurement is performed by operating the four-way valve 9c so that the inlet pipe 4b and the header portion 9b are in communication with each other, and the outlet pipe 3b and the header portion 9a are in communication with each other. By changing the direction of flow and introducing the fluid from the header portion 9b into the base volume pipe 2b, the spear 5b enters two D2 7b-> D1 (6b) into the base volume pipe 2b. ), And the sphere 5b reaches the header portion 9a.

Thus, the pipe prober is a device which compares the flowmeter and the volume between D1 (6b) and D2 (7b) using two detector sensors (D1, D2).

Pipe probes that calibrate the meter under test used for such transactions must also be calibrated, such as the waterdraw method or the master meter method (API manual of petroleum measurement standards). , chapter 4.9 part 2 and part 3).

The water draw method collects the volume of fluid discharged while the sphere inside the calibrator moves to a tank prover and measures the base volume. It is a method to measure the volume of the base by collecting more than 10,000 pulses with a master meter that has calibrated the volume of fluid discharged while moving with a tank prober.

Fig. 2 is a piping diagram of a calibration apparatus of the water draw method.

Here, the correction method of the water draw method is as follows.

1) Construct a pipe as shown in FIG. 2 and prepare a tank prober 1 and a reference flowmeter 10.

2) When water storage is completed in the storage tank 12, the pump 14 is driven to fill the water in the pipe 21 of the pipe prober 20. At this time, the flow rate of the reference flow meter 10 is checked, and water is filled at an appropriate flow rate. While filling the water, the air inside the pipe 21 of the pipe prober 20 is removed by opening the air vent valve of the header portion 22.

3) Four-way valve (32) three to four times in order of D1 (24)-> D2 (26)-> D1 (24) so that foreign matters inside the pipe 21 of the pipe prober 20 can be removed. ), The foreign matter inside the pipe prober 20 is opened to remove the header 22.

4) Open the header part 22 of the pipe prober 20 and insert the spear, and then proceed three to four times in the order of D1 (24) → D2 (26) → D1 (24), When the outlet temperature is stable, water draw is performed.

5) Before the water draw, the air inside the pipe 21 of the pipe prober 20 is removed by opening the air vent valve of the header part 22.

6) In the case of the bidirectional pipe prober, the four-way valve 32 is operated to determine the flow of fluid to move the sphere, and in the case of the universal pipe prober, the sphere is operated by using sphere launching interchange. Move it.

7) Operate the calibration kit (Proving kit, 30) to move the sphere from D1 → D2 (or D2 → D1), and fill in the temperature and pressure of the pipe prober 20 one to three times in the calibration section. At this time, accurately fill in the volume of the tank prober (1) to be collected.

8) After the calibration, the collection amount of tank prober (1) can be read in the same way at the correct position.

9) Drain the water filled in the tank prober (1). At this time, the withdrawal time is about 30 seconds as the time when the water flow stops inside the tank prober 1 and starts to fall into the drop, and closes the valve.

10) Measure at least 3 round trips from D1 → D2, D2 → D1.

11) Measure the volume of pipe prober 20 at least three times between D1 → D2, D2 → D1. If the repeatability is within 0.02%, calculate the measurement uncertainty and prepare a calibration certificate.

12) Repeat steps 5) to 9) until a satisfactory calibration result is obtained.

During pipe probe calibration, the sizing of the sphere and the operating state of the detector sensor have a great influence on the calibration result.

If the sizing is not done properly, the bass volume is not measured accurately. Also, even if the sizing is done correctly, if the detector sensor is not properly operated, the accurate base volume of the pipe prober is difficult to measure. As such, the operation of the spear sizing and the detector sensor is one of the most important elements in the pipe prober.

For example, if spear sizing is not properly performed, the spear does not move in the header portion 22 described above, or even if the sphere does not move, it may move to a state in which the pipe prober is not completely in contact with each other and thus the accurate basal volume cannot be measured. In addition, when the operating state of the detector sensor is not smooth, there is a problem that the calibration should be continued until it is determined that the detector sensor is a problem.

In addition, the fluid inside the pipe prober is removed while the cause of the problem such as the operation of the sizing sizing and the detector sensor is not confirmed, the header is opened, the spear is taken out to be resized, or the detector sensor is checked. This results in time and costly losses in finding and handling the cause of the problem.

The present invention has been made to solve the above problems, to solve the problem of significantly reducing the loss of the calibration time and cost of the pipe prober, the present inventors have the sizing sizing state, the presence or absence of the operation of the detector sensor only by locating the spear It came to complete the invention which can confirm to a state.

More specifically, if the sizing is not properly done, the water is not properly formed by the pipe and the sphere in the header portion or the bent portion of the base volume pipe, and leakage occurs in the gap between the sphere and the pipe, causing the sphere to move. If the sphere moves in the direction of the fluid inside the pipe prober, the detector sensor may not be operated due to the size contraction caused by the spear tearing or cracking inside the pipe. In addition, if the sphere size is larger than the pipe, the sphere itself does not move, the detector sensor itself may not operate.

As such, the sizing of the spear can be confirmed by locating the spear.

In addition, when the sizing is properly performed, if the detector sensor is not confirmed, it may be determined that the detector sensor is abnormal.

The present invention is to solve the above-mentioned problems, the present invention comprises the steps of putting the mixed solution of the antifreeze and water and the powder or flake magnet into the sphere and the spear sizing; Inserting the sized sphere into the head portion of the pipe prober and flowing fluid; Sending a signal by a magnetic sensor and a detector sensor in an order of passage of the sphere by the flow of the fluid; The internal inspection method of the pipe prober comprising the step of determining whether there is an abnormality in the pipe prober by the signal of the magnetic sensor and the signal of the detector sensor.

The present invention also relates to an internal inspection method of a pipe prober, wherein the determining of the abnormality is a step of determining an abnormality of the sizing of the sphere and a failure of the detector sensor.

The present invention also relates to an internal inspection method of a pipe prober, wherein the magnetic sensor is installed on an outer surface of a pipe of the pipe prober.

According to the present invention, it is possible to check the sizing state and the presence or absence of the operation of the detector sensor by grasping the position of the spear moving inside the pipe prober, which is convenient for the calibration and maintenance of the pipe prober.

It is also very economical in terms of time and cost when calibrating and maintaining pipe probes.

1 is a piping diagram of a bidirectional pipe prober.
2 is a piping diagram of a water draw method.
3 is a sectional view of a sphere.

The present invention uses a magnetic sensor (M) to impart magnetism to the sphere 40 to confirm its movement.

To this end, the spear 40 is sized by inserting a mixed solution of antifreeze and water in an appropriate ratio by using a manual pump in the spear 40 into the spear 40 and crushing the spear 40 into the mixed liquid. By mixing the spear 40 itself into a magnetized magnetic material.

Since the spear 40 becomes a magnetic material through the above-described method, the magnetic sensor M can grasp the position of the spear 40 from the outside of the pipe when passing through the inside of the pipe probe. At this time, the magnetic sensor M is expressed by sound or numerical value.

The magnetic sensor (M) uses a method of detecting the sphere 40 by fixing it to the outside of the pipe, otherwise it is also possible to use the magnetic sensor (M) in a movable manner without fixing.

One configuration of the magnetized sphere 40 will be described with reference to FIG. 3 and the like.

Spear 40 is a spherical body made of nitrile, and a cavity is formed therein. In addition, holes 42 are formed in the upper and lower portions of the spear 40 to be connected to the internal cavities.

A mixed liquid obtained by mixing the antifreeze and the water in a ratio of 1: 1 through the hole 42 is introduced into the spear 40, and a powder or flake magnet is put into the mixed liquid. The powdered powder can be mixed with the antifreeze and put into the spear 40 through a pump or the like, and the piece magnet can be put into the spear 40 directly by hand separately from the antifreeze.

Thereafter, the sealing member 44 which is the same as the size of the hole 42 is inserted into the hole 42 through the sealing of the sphere 40. Through this, the sphere 40 is completely sealed. As the sealing member 44, a sealing bolt or the like can be used.

Hereinafter, a method of inspecting the inside of the pipe prober with the magnetic sensor M using the magnetized sphere will be described.

In FIG. 2, the magnetic sensor M is provided on the outer surface of the pipe 21 of the pipe prober 20.

As a preparatory step before calibrating the pipe prober 20, the spear 40 is removed from the header portion 22, and a mixed liquid obtained by mixing an antifreeze and water in an appropriate ratio by using a manual pump is placed inside the spear 40. The spear 40 is sized, and the powder or flake magnet is mixed with such a mixed liquid to make the spear 40 itself into a magnetic material having one magnetization, and is put back into the header portion 22 to be fastened.

Thereafter, when the spear 40 passes through the inside of the pipe prober 20 by flowing the fluid, the position of the spear 40 can be grasped from the outside of the pipe by a sound or a numerical value generated by the magnetic sensor M.

If there is no signal from the magnetic sensor M within the normal time, the sizing is wrong and larger than normal, and the detector sensors D1 and D2 are normal, and the spear 40 is caught by the header portion 22 and does not enter the pipe 21. If this is not the case, in this case, the header 22 may be opened to resize the spear 40.

If the signal comes from the magnetic sensor M within the normal time and the signal does not come from one of the two detector sensors, the sizing is normal and the detector sensor has failed, so the detector sensor needs to be repaired.

If the signal comes into the magnetic sensor M within the normal time and the signal does not come from both the detector sensors, the sphere 40 is smaller than normal and is not sensed by both detector sensors. The sizing is normal, but you can take care of the failure of two detector sensors at the same time.

By identifying the position of the spear 40 as described above, it is possible to easily determine whether the problem of the spear 40 sizing or the detector sensor, it is advantageous for maintenance, it is possible to reduce the time and manpower.

M: Magnetic Sensor 1: Tank Prover
2b: volume pipe 3b: inlet piping
4b: Outlet piping 5b: Spear
7a, 7b: detector sensors D1, D2
9a: header portion 9c: four-way valve
10: reference flow meter 14: pump
20: pipe prober 21: piping
22: header 40: spear
42: hole 44: sealing member

Claims (3)

Putting a mixture of antifreeze and water, and powder or flake magnet into the sphere and sizing the sphere;
Inserting the sized sphere into the head portion of the pipe prober and flowing fluid;
Sending a signal by a magnetic sensor and a detector sensor in an order of passage of the sphere by the flow of the fluid;
Determining whether there is an abnormality in the pipe prober by using the signal of the magnetic sensor and the signal of the detector sensor;
Internal inspection method of the pipe prober made of. The method of claim 1,
Determining the abnormality is
Determining whether there is an abnormality in the sizing of the sphere and whether the detector sensor is broken
The internal inspection method of the pipe prober, characterized in that. The method according to claim 1 or 2,
The magnetic sensor is an internal inspection method of the pipe prober, characterized in that installed on the outer surface of the pipe of the pipe prober.

Images