CN116658817B

CN116658817B - Automatic balancing compensation system and method for gas pressure rise of LNG storage tank

Info

Publication number: CN116658817B
Application number: CN202310885498.3A
Authority: CN
Inventors: 郑恒; 郭鹏亮; 罗仁; 陆国辉; 杨小兵; 莫晓军; 聂铁军; 冷本宇
Original assignee: China Nuclear Industry Fifth Construction Co Ltd
Current assignee: China Nuclear Industry Fifth Construction Co Ltd
Priority date: 2023-07-18
Filing date: 2023-07-18
Publication date: 2025-08-22
Anticipated expiration: 2043-07-18
Also published as: CN116658817A

Abstract

The automatic balance compensation system comprises a control component and a balance weight adjusting component, wherein the control component comprises a monitoring unit and a processing unit, the monitoring unit is used for detecting the real-time posture of a dome of the storage tank in the jacking process, the processing unit is used for calculating balance compensation quantity according to the real-time posture, the balance weight adjusting component comprises a balancing weight, a driving piece and a traveling line, the traveling line is arranged on the dome, the driving piece is in signal connection with the control component and is used for driving the balancing weight to automatically move on the traveling line according to signals of the processing unit, and the balancing weight adjusts the position of the balancing weight through movement on the traveling line, and further applies balance compensation quantity to the dome by means of moment so as to automatically adjust the deflection of the dome. The system can realize automatic balance compensation of the vault of the storage tank by means of a moment balance principle. The automatic balance compensation method for the LNG storage tank pneumatic lifting jack is also provided.

Description

Automatic balance compensation system and method for LNG storage tank pneumatic jack

Technical Field

The invention relates to the field of LNG storage tanks, in particular to the field of balance compensation of a storage tank pneumatic lifting jack.

Background

The diameter of the inner tank of the ultra-large LNG storage tank reaches more than 92 meters, and the pneumatic lifting jack is used as an important link in the construction of the storage tank main body, so that the risk is high in the lifting jack process, and the inclination control of the whole vault is high in the lifting jack process.

At present, in the air pressure jacking process of an LNG storage tank, a balance calculation mode is generally adopted to balance and arrange the arch. As the dome balance is affected in many ways, the risk of tilting during the dome air pressure lift increases with increasing tank volume.

Disclosure of Invention

The invention aims to provide a balance compensation device for an LNG storage tank pneumatic lifting jack, which can realize automatic balance compensation of a storage tank vault.

The automatic balance compensation system for the LNG storage tank pneumatic lifting jack comprises a control assembly and a balance weight adjusting assembly, wherein the control assembly comprises a monitoring unit and a processing unit, the monitoring unit is used for detecting the real-time posture of a storage tank vault in the lifting jack process, the processing unit is used for calculating a balance compensation amount according to the real-time posture, the balance weight adjusting assembly comprises a balance weight, a driving piece and a traveling line, the traveling line is arranged on the vault, the driving piece is in signal connection with the control assembly and is used for driving the balance weight to automatically move on the traveling line according to signals of the processing unit, and the balance weight is moved on the traveling line to adjust the self position through movement on the traveling line, and further the balance compensation amount is applied to the vault by means of moment so as to automatically adjust the deflection of the vault.

In one or more embodiments, the travel path is a rail disposed inside or outside the vault, and the weight is movably disposed on the rail.

In one or more embodiments, the travel route is a wire rope, the wire rope is fixed inside the vault through a suspension point, and the counterweight is suspended on the wire rope.

In one or more embodiments, the weight may be alternatively disposed on the travel path.

In one or more embodiments, the first end point and the second end point of the travelling line are respectively an inner center of the vault and a radial edge of the vault, the travelling lines are uniformly distributed in the vault in a circumferential manner with the inner center, and the travelling lines are provided with corresponding balancing weights.

In one or more embodiments, a plurality of the travel routes form a travel network inside the vault, and the counterweight is arranged to be movable from one travel route to another.

In one or more embodiments, the monitoring unit includes a ranging device and/or a camera device.

The invention further provides an automatic balance compensation method for the LNG storage tank pneumatic jack, which is carried out by using the automatic balance compensation system for the LNG storage tank pneumatic jack, and comprises the following steps that a monitoring unit of a control assembly acquires the real-time posture of a vault in the vault lifting process; and enabling the processing unit to calculate the balance compensation quantity according to the real-time gesture, sending a driving signal to the driving piece, enabling the driving piece to receive the driving signal, and driving the balancing weight to move to a designated stay position in the vault along the walking line.

In one or more embodiments, the calculation method of the specified stay position comprises the steps that the processing unit calculates the offset and the offset direction of the vault through the real-time gesture, calculates the compensation moment required by the vault when the vault is restored to be balanced according to a moment balance principle by utilizing the offset and the offset direction, and calculates the specified stay position according to the compensation moment and the weight of the balancing weight.

In one or more embodiments, the guide rail is used as a walking route when the LNG storage tank central type pneumatic jacking mode is adopted, and the steel wire rope is used as the walking route when the LNG storage tank edge type pneumatic jacking mode is adopted.

According to the automatic balance compensation system and the method for the LNG storage tank pneumatic lifting roof, the moment balance principle is utilized, the counterweight mechanism capable of moving automatically is arranged in the roof before lifting the roof, the automatic weight compensation is carried out on the roof position where the attitude is not on the same plane through the numerical value fed back by each monitoring point of the roof in the lifting process, the roof is further restored to balance, the offset is overcome, the roof can be regarded as a rigid body, when one end of a certain position of the roof is lifted, the other end of the roof is inevitably moved downwards, and the counterweight moves along the lifted end of the roof automatically, so that the balance deviation of the roof is automatically counteracted.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description in conjunction with the accompanying drawings and embodiments, in which:

FIG. 1 is a schematic diagram of a conventional LNG tank center-to-center pneumatic jack-up process;

FIG. 2 is a schematic diagram of a conventional LNG tank edge-type pneumatic jack-up process;

FIGS. 3A and 3B are schematic views of the rail and counterweight when mated;

FIG. 4 is a schematic illustration of a wire rope mated with a weight;

FIG. 5 is a flow chart of a method of automatic balance compensation for an LNG tank pressure lift-off;

Fig. 6 is a logic diagram of an automatic balance compensation method.

Detailed Description

The present invention will be further described with reference to specific embodiments and drawings, in which more details are set forth in the following description in order to provide a thorough understanding of the present invention, but it will be apparent that the present invention can be embodied in many other forms than described herein, and that those skilled in the art may make similar generalizations and deductions depending on the actual application without departing from the spirit of the present invention, and therefore should not be construed to limit the scope of the present invention in terms of the content of this specific embodiment.

It is noted that these and other figures are merely examples, which are not drawn to scale and should not be construed as limiting the scope of the invention as it is actually claimed.

The top of LNG storage tank is the rigidity vault, has great quality and has higher height from ground, generally adopts the pneumatic jacking mode to realize rising the top. A common method for lifting is that, as shown in fig. 1 and 2, the concrete wall 105 forms a circle of enclosing wall, and a ceiling board 104 is further provided, and a fan is used to continuously blow air into the enclosing wall, so that wind pressure exists in the enclosing wall, the ceiling board 104 is blown, and the vault 10 is lifted by the wind pressure. The air jacking method generally needs to be provided with a sealing device, a balancing device and the like, so that the problems of inclination, displacement and air leakage of the tank body in the jacking process are avoided.

The conventional balancing apparatus, as shown in fig. 1, comprises a wire rope 101, a T-shaped frame 106 and wheels 102, which are arranged outside a vault 10, the T-shaped frame 106 is fixedly arranged in a concrete wall 105 through a lifting lug 107, so that force generated by the oblique deflection of a tank body is transferred to a pair of T-shaped frames 106 through the wheels 102 and the wire rope 101, and the force is transferred to the T-shaped frames 106 by means of the tension of the wire rope 101 and the force of the T-shaped frames 106, so that the force is interacted to achieve the balance.

In the air pressure rising process of the dome 10, tilting, shifting, etc. are unavoidable. The automatic balance compensation system of the LNG storage tank pneumatic lifting jack adopts different principles and designs with the traditional balance mode, can effectively prevent the vault from tilting, and automatically, timely and accurately adjusts the vault gesture.

As will be appreciated with reference to fig. 3-6, the LNG tank pressure rise top automatic balance compensation system includes a control assembly 11 and a weight adjustment assembly 12.

The control assembly 11 comprises a monitoring unit for detecting the real-time attitude of the tank dome 10 during the jacking process and a processing unit for calculating the balance compensation amount based on the real-time attitude.

As in some embodiments, the monitoring unit includes a ranging device and/or a camera device. The distance measuring device collects equidistant data such as height and width of the dome at different positions of the dome, and the offset direction of the dome can be known through calculation of the distance data. The image pickup device can be used for carrying out image processing on the dome outline in the photo by taking a dome photo in real time, so that parameters such as the gesture, the offset direction and the like of the dome are known in real time.

Ranging devices include, but are not limited to, those employing laser ranging devices, ultrasonic ranging devices, grating or magnetic grating ruler type ranging devices.

The weight adjustment assembly 12 comprises a weight 121, a drive 122 and a travelling line 123, which travelling line 123 is arranged on the dome 10, such as on the dome stringers or the inner and outer tracks inside the dome, but also outside the dome. The driving member 122 may be a driving motor, and is in signal connection with the control assembly, and is configured to drive or pull the balancing weight 121 to move on the running line according to the processing signal of the processing unit, as indicated by the direction P.

Wherein the weight 121 adjusts its position by moving on the travel line, and when moving to a designated position calculated by the processing unit, the position is a moment-stabilized position, and a balancing compensation amount can be applied to the dome by means of moment to automatically adjust the deflection of the dome 10. That is, the vault can be regarded as a rigid body, when one end of a certain position of the vault is upwarped, the other end of the vault is necessarily downwarped, and the self-moving balancing weight moves along the upwarped end of the vault, so that the vault balance deviation is counteracted, the moment balance principle is utilized to perform weight compensation on the vault position where the gesture is not in the same plane, and the vault is prevented from tilting.

For example, in some embodiments, travel path 123 is a rail 1231, such as a toothed rail, as shown in fig. 3A and 3B, and counterweight 121 is movably disposed on rail 1231. When the vault of the storage tank is constructed, the guide rail is arranged below the beams of the vault and near the center of the vault according to the uniformly distributed directions, or the rack is arranged above the vault and staggered with the jacking balance steel wire rope, the balancing weight is arranged at the tail end of the guide rail, and the weight of the balancing weight is selected according to the requirement.

The self-balancing weight originally in the vicinity of the upward inclination of the vault automatically moves from the center edge guide rail to the vault edge direction by driving or traction of the driving piece. Thereby playing a role in vault balance compensation. After the lifting is finished, after the central pulley block is removed, the restraint of the guide rail beam head is released, and the guide rail is taken out through the central ring hole. When the LNG tank center type pneumatic jack system shown in fig. 1 is adopted, it is preferable to use a guide rail as a traveling route.

In other embodiments, as shown in fig. 4, the travel path 123 is a wire rope 101, the wire rope 101 is fixed inside the vault 10 by a suspension point, and the weight 121 is suspended on the wire rope 101. When the LNG tank edge type pneumatic jack system shown in fig. 2 is used, a wire rope is preferably used as a traveling route.

In the construction of the tank dome, the pulleys 19 are arranged in a uniform orientation under the beam center ring of the dome 10. The wire 101 passes through the pulley 19 and another portion of the wire is wound around the winder 18, the wire forming a closed loop around the pulley 19 and the winder 18. In the vicinity of the center of the dome, i.e., in the vicinity of the pulley 19, a weight 121 is fixed to the wire rope in a structure as shown in fig. 4, and the weight 121 in the vicinity of the upward inclination of the dome is driven to move from the center toward the edge of the dome by a control unit and a driving member to perform a dome balance compensation function by calculating the inclination measured at the time of lifting the dome.

The distance from the balancing weight to the center of the vault takes the center of the vault as a moment center point, so that the moment is obviously influenced, and the compensation accuracy of balance is further influenced. Therefore, the installation position of the walking line needs to cover the inside of the vault as much as possible, so as to realize finer compensation.

For example, the first end point and the second end point of the travelling lines are respectively the inner center of the vault and the radial edge of the vault, the travelling lines are uniformly distributed in the vault in the circumferential direction of the inner center, and the travelling lines are provided with corresponding balancing weights. For example, eight symmetrically mounted guide rails 1231 are provided every 40 ° in a 360 ° ring around the center of the dome interior, only one of which is shown in fig. 3. Therefore, the device can be adjusted according to the size of the vault of the storage tank, and the balance compensation requirements of the air pressure lifting roof of the storage tank with different sizes can be met through the cooperation of guide rails with different groups of numbers and balancing weights.

For another example, the traveling lines form a traveling network at the inner side of the vault, and the balancing weights are arranged to be capable of moving from one traveling line to the other traveling line, so that the moving range of the balancing weights is increased. And in the jacking process, moment compensation is carried out on the arch top counter weight difference value in the jacking process or before jacking through the movement of the counter weight at different positions on the walking network.

In some embodiments, weight 121 may also be provided in an alternative configuration, providing weights of different masses. Since the weight of the balancing weight is also an important factor affecting the moment, balancing weights 121 of different weights can be used for different specifications of vaults.

Therefore, in the automatic balance compensation system of the LNG storage tank pneumatic jack, in the jack-up process of the jack-up, the elevation and the gesture of each point position of the jack-up are monitored according to the monitoring unit, the balance compensation quantity is calculated in real time through the processing unit, the balance weight is automatically moved to the corresponding moment stable position, the moment value born by each bearing of the jack-up is ensured to be 0, the inclination quantity of the jack-up, which is generated due to various reasons in the jack-up process, is automatically compensated in real time by virtue of the moment balance principle, and the jack-up balance precision in the pneumatic jack-up is effectively improved. And the whole process does not need manual intervention, so that the installation process is simplified, and the safety in the construction process is also improved.

In combination with the above description of the automatic balance compensation system for the pneumatic jack of the LNG storage tank, it can be further understood that an automatic balance compensation method for the pneumatic jack of the LNG storage tank is understood with reference to fig. 5 and 6, and includes the steps of acquiring a real-time posture of the dome by using a detection unit of a control assembly during the raising process of the dome, calculating a balance compensation amount according to the real-time posture by using a processing unit, sending a driving signal to a driving member, receiving the driving signal by using the driving member, and driving a balancing weight to move to a designated stay position in the dome along a walking line.

The appointed stay position is the moment balance position of the balance vault. The calculation method of the appointed stay position comprises the steps of calculating the offset and the offset direction of the vault through real-time gestures by a processing unit, calculating the compensation moment required by the vault when the vault is restored to be balanced according to a moment balance principle by utilizing the offset and the offset direction, and finally calculating the appointed stay position, namely the distance from the center of the vault according to the compensation moment and the weight of the balancing weight.

The method fully considers the flow and process of the pneumatic jacking and the actual operation environment, and specifically designs the reason for the inclination of the vault in the jacking process. And under the condition of inclination in the process of lifting the vault, the balance weight is used for automatic compensation, so that the balance accuracy of the vault is improved. The method performs depth optimization design on the original rough balance weight arrangement, performs dynamic balance compensation on the arch, does not influence the arch crown movement in the jacking process, performs dynamic compensation in the jacking process, meets the construction requirements during personnel operation, and avoids the situation of difficult follow-up removal.

The application uses specific words to describe embodiments of the application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the application may be combined as suitable.

While the invention has been described in terms of preferred embodiments, it is not intended to be limiting, but rather to the invention, as will occur to those skilled in the art, without departing from the spirit and scope of the invention. Therefore, any modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention fall within the protection scope defined by the claims of the present invention.

Claims

An automatic balance compensation system for an lng tank air pressure lift cap, comprising:

The control assembly comprises a monitoring unit and a processing unit, wherein the monitoring unit is used for detecting the real-time posture of the vault of the storage tank in the jacking process, and the processing unit is used for calculating the balance compensation amount according to the real-time posture;

The counterweight adjusting assembly comprises a counterweight, a driving piece and a walking circuit, wherein the walking circuit is arranged on the vault, and the driving piece is in signal connection with the control assembly and is used for driving the counterweight to move on the walking circuit according to the signal of the processing unit;

the balancing weight moves on the walking line to adjust the position of the balancing weight, and the balancing compensation quantity is applied to the vault by virtue of moment balance so as to automatically adjust the deflection of the vault;

the balancing weight is alternatively arranged on the walking line.
2. The LNG tank pressure rise roof automatic balance compensation system of claim 1, wherein the travel line is a rail, the rail being disposed inside or outside the vault, the weight being movably disposed on the rail.
3. The automatic balance compensation system of an LNG tank pressure jack of claim 1, wherein the travel line is a wire rope, the wire rope is secured inside the vault by a suspension point, and the counterweight is suspended on the wire rope.
4. The automatic balance compensation system of an LNG tank pressure rise roof of claim 1, wherein the first and second end points of the travel routes are an inner center of the roof and a radial edge of the roof, respectively, and a plurality of travel routes are uniformly distributed in the roof in an inner center circumferential direction, and each travel route is provided with a corresponding counterweight.
5. The automatic balance compensation system of an LNG tank pressure rise roof according to claim 1, wherein a plurality of the travel routes form a travel network inside the vault, and the weight is provided to be movable from one travel route to another.
6. The LNG tank pressure rise roof automatic balance compensation system of claim 1, wherein the monitoring unit includes a ranging device and/or a camera device.
An automatic balance compensation method for an LNG tank pneumatic jack, characterized in that the automatic balance compensation system for an LNG tank pneumatic jack according to any one of claims 1 to 6 is used, comprising the steps of:

In the process of raising the vault, enabling a monitoring unit of the control assembly to acquire the real-time attitude of the vault;

the processing unit calculates the balance compensation quantity according to the real-time gesture and sends a driving signal to the driving piece;

and enabling the driving piece to receive the driving signal and driving the balancing weight to move to a designated stay position in the vault along the walking line.
8. The method of claim 7, wherein the calculation method of the specified stay position is:

The processing unit calculates the offset and the offset direction of the vault through the real-time gesture;

According to the moment balance principle, calculating the compensation moment required by the restoration of the balance of the vault by utilizing the offset and the offset direction;

and calculating the appointed stay position according to the compensation moment and the weight of the balancing weight.
9. The method of claim 7, wherein,

When the LNG storage tank central type pneumatic jacking mode is adopted, a guide rail is used as a walking route;

when the LNG storage tank edge type pneumatic lifting mode is adopted, a steel wire rope is used as a walking route.