CN109186536A - A kind of device and method for monitoring pipeline elevator sunpender tilt angle on-line - Google Patents

Abstract

The invention discloses a kind of device and methods for monitoring pipeline elevator sunpender tilt angle on-line, which includes cylinder, support ring and steel ball etc.；Wherein, cylinder is axially arranged in an axially parallel mode with sunpender, and cylinder and sunpender fit closely together, support ring is arranged in cylinder, its circumferential inner wall with cylinder links together, steel ball is sleeved in support ring, and is connected by lifting rope with the data processor that top outside cylinder is arranged in, and data processor is used for the pulling force of real-time reception lifting rope.This method comprises: tilt angle a is also tilted therewith between cylinder, support ring and steel ball at this time and angle is identical, and steel ball is by three power: the pulling force F of gravity G, lifting rope when sunpender run-off the straight_{It draws}With the support force F of support ring_Branch, according to the forst law of motion: the resultant force of these three power is zero；And then sunpender tilt angle is calculated.It is the configuration of the present invention is simple, easy to operate, only by the force analysis of steel ball, sunpender tilt angle can be obtained in real time.

Description

Device and method for online monitoring of inclination angle of pipe hanger boom

technical field

The invention belongs to the technical field of thermal power generation, and in particular relates to a device and a method for online monitoring of the inclination angle of a hanger rod of a pipeline hanger.

Background technique

There are various large-diameter pipes in thermal power plants, including steam pipes and water pipes. As an important accessory of the pipeline, the support and hanger play a role in bearing the weight of the pipeline, so that the self-weight stress of the pipeline is within the allowable range; increase the rigidity of the pipe to avoid excessive deflection and vibration; control the size and direction of the thermal displacement of the pipeline to ensure that the pipeline and the safe operation of equipment connected to it. Therefore, the normal service of the support and hanger is of great significance to the safe and stable operation of large-diameter pipelines in thermal power plants.

In the change of hot and cold state, the large-diameter pipe will move, causing its hanger to shift. Excessive inclination angle will cause the pipeline to bear large additional bending stress. Therefore, the inclination of the hanger boom is related to the stable and safe operation of the pipeline. Relevant standards and specifications stipulate the inspection timing and eligibility criteria for the inclination angle of the hanger boom. . According to section 3.8.6 of DL/T 616-2006 "Guidelines for Maintenance and Adjustment of Steam-Water Pipes and Support Hangers in Thermal Power Plants": when the tie rod of the hanger is under various working conditions, the rigid hanger swing angle exceeds 3°, and the elastic When the swing angle of the hanger exceeds 4°, the cause should be found out and dealt with. Therefore, it is particularly important to accurately measure the inclination of the hanger rod for the assessment of the safety status of the pipeline and its hanger system.

At present, the inclination angle measurement of the hanger rod of the pipeline hanger is mainly carried out by the total station, theodolite method, macro evaluation and other methods. In addition, the above-mentioned measurement methods can only be carried out on a regular basis and cannot be monitored in real time.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a device and method for online monitoring the inclination angle of the hanger rod of the pipeline hanger.

The present invention adopts following technical scheme to realize:

A device for online monitoring of the inclination angle of a pipe hanger boom, comprising a cylinder body, a support ring, a steel ball and a data processor; wherein,

The axial direction of the cylinder body is arranged parallel to the axial direction of the boom, and the cylinder body and the boom are closely attached together. The support ring is set in the cylinder body, and its circumferential direction is connected with the inner wall of the cylinder body. The steel ball is sleeved in the support ring , and is connected with a data processor arranged on the top of the outer cylinder through a sling, and the data processor is used to receive the pulling force of the sling in real time.

A further improvement of the present invention is that the cylinder body and the boom are welded together.

A further improvement of the present invention is that there is a gap between the steel ball and the support ring, and the gap is less than 1 mm.

A further improvement of the present invention lies in that the steel ball is a metal ball with uniform quality, and its center of gravity is the same point as its spherical center.

A further improvement of the present invention lies in that the connecting line between the suspending rope and the center of the steel ball and the suspending rope are on the same straight line.

A further improvement of the present invention is that the cylindrical body is a rectangular cylindrical body with a hollow cavity, and the support ring is evenly connected to the inner wall of the cylindrical body in the circumferential direction.

A method for online monitoring of the inclination angle of a pipe hanger hanger rod, the method is based on the above-mentioned device for online monitoring of the inclination angle of a pipe hanger hanger rod, comprising:

When the boom is inclined, the inclination angle is a. At this time, the cylinder, the support ring and the steel ball are also inclined at the same angle, and the steel ball is subjected to three forces: the gravity G, the _pulling force F of the suspending rope, and the support ring. According to Newton's _first law, the resultant force of these three forces is zero;

The relationship between the above three forces is as follows:

G·cosa'=F _pull , G·cos(90°-a')

Then the inclination angle of the boom a=a'=acrcos(F _pull /G)

Among them, a' is the angle between the hanging rope and the vertical direction.

The present invention has following beneficial technical effect:

The device for online monitoring of the inclination angle of a pipe hanger hanger provided by the present invention includes a cylinder body, a support ring, a steel ball and a data processor, and has a simple structure and convenient operation. Get the boom tilt angle in real time.

The invention provides a method for measuring the inclination angle of the hanger rod of a pipeline hanger. The method utilizes the characteristic that the inclination angle of the hanger rod and the angle between the hanging rope and the vertical direction are arranged diagonally, and through the force analysis of the steel ball, Obtain the angle between the suspension rope and the vertical direction, and then obtain the inclination angle of the suspension rod.

Description of drawings

FIG. 1 is a front view of the present invention.

Figure 2 is a top view of the present invention.

FIG. 3 is a state diagram of the present invention when it works.

Fig. 4 is the force analysis diagram of the steel ball when the present invention works.

Description of reference numerals: 1-cylinder, 2-support ring, 3-steel ball, 4-data processor, 5-hoisting ring, 6-hoisting rope.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings.

The present invention will be further described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 3 , a device for online monitoring of the inclination angle of a pipe hanger hanger provided by the present invention includes a cylinder body 1 , a support ring 2 , a steel ball 3 and a data processor 4 ; wherein the cylinder body 1 The axial direction is arranged parallel to the axial direction of the boom 5, and the cylinder 1 and the boom 5 are tightly welded together. The support ring 2 is arranged in the cylinder 1, and its circumferential direction is connected with the inner wall of the cylinder 1. The steel ball 3 is sheathed in the support ring 2, and is connected with the data processor 4 arranged on the outer top of the cylinder 1 through the suspending rope 6, and the data processor 4 is used to receive the pulling force of the suspending rope 6 in real time.

Wherein, there is a gap between the steel ball 3 and the support ring 2, and the gap is less than 1 mm. The steel ball 3 is a metal ball with uniform mass, and its center of gravity is the same point as its center. The central connecting line of the suspending rope 6 and the steel ball 3 is on the same straight line as the suspending rope 6 . The cylindrical body 1 is a rectangular cylindrical body with a hollow cavity, and the support ring 2 is evenly connected to the inner wall of the cylindrical body 1 in the circumferential direction.

The present invention provides a method for on-line monitoring of the inclination angle of a pipe hanger hanger rod. It is also inclined and the angle is the same, and the steel ball 3 is subjected to three forces: gravity G, the _pulling force F of the suspending rope, and the _supporting force F of the support ring 2, as shown in FIG. 4 . According to Newton's first law (when an isolated particle remains stationary or moves in a straight line at a uniform speed, the resultant force it receives is zero), it can be known that the resultant force of these three forces is zero. The relationship between the above three forces is as follows:

G·cosa'=F _pull , G·cos(90°-a')

Then the inclination angle of the boom a=a'=acrcos(F _pull /G)

Among them, a' is the angle between the hanging rope and the vertical direction.

The function of the data processor: receive the _tension F of the suspending rope in real time, and then use the above formula to calculate the _tension F and the known steel ball gravity G to obtain the inclination angle a of the boom, and then transmit the inclination angle a of the boom to Remote control room real-time detection system.

Claims (7)

1. A device for monitoring the inclination angle of a hanger rod of a pipeline hanger on line is characterized by comprising a cylinder body (1), a support ring (2), a steel ball (3) and a data processor (4); wherein,

barrel (1) axial and jib (5) axial parallel arrangement, and barrel (1) and jib (5) close fit be in the same place, support ring (2) set up in barrel (1), its circumference links together with the inner wall of barrel (1), steel ball (3) suit is in support ring (2), and link to each other through lifting rope (6) and data processor (4) that set up at barrel (1) top outside, data processor (4) are used for receiving the pulling force of lifting rope (6) in real time.

2. The device for on-line monitoring the inclination angle of the hanger rod of the pipeline hanger as claimed in claim 1, wherein the barrel (1) and the hanger rod (5) are welded together.

3. The device for on-line monitoring the inclination angle of the hanger rod of the pipeline hanger as claimed in claim 1, wherein a gap is left between the steel ball (3) and the support ring (2), and the gap is less than 1 mm.

4. The device for on-line monitoring of the inclination angle of the hanger rod of the pipeline hanger as claimed in claim 1, wherein the steel ball (3) is a metal ball with uniform mass, and the center of gravity of the metal ball is the same point as the center of the metal ball.

5. The device for on-line monitoring of the inclination angle of the hanger rod of the pipeline hanger as claimed in claim 1, wherein the connecting line of the central connecting line of the lifting rope (6) and the steel ball (3) and the lifting rope (6) are on the same straight line.

6. The device for on-line monitoring the inclination angle of the hanger rod of the pipeline hanger as claimed in claim 1, wherein the cylinder (1) is a rectangular cylinder with a hollow cavity, and the support ring (2) is uniformly connected with the inner wall of the cylinder (1) in the circumferential direction.

7. A method for on-line monitoring of a tilt angle of a boom of a pipeline hanger, which is based on the device of claim 1, comprising:

when jib (5) take place to incline, inclination is a, also incline thereupon and the angle is the same between barrel (1), support ring (2) and steel ball (3) this moment, and steel ball (3) receive three power: gravity G, pulling force F of lifting rope_{Pulling device}And the supporting force F of the supporting ring (2)_{Branch stand}From newton's first law: the total of these three forces is zero;

the relationship between the above three forces is shown as follows:

G·cosa'＝F_{pulling device}，G·cos(90°-a')

The boom inclination angle a ═ a' ═ acrcos (F)_{Pulling device}/G)

Wherein a' is an included angle between the lifting rope and the vertical direction.