CN112212111B - Method for restraining pressure thrust of expansion joint of corrugated pipe by using electromagnetic force - Google Patents
Method for restraining pressure thrust of expansion joint of corrugated pipe by using electromagnetic force Download PDFInfo
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- CN112212111B CN112212111B CN202011058662.6A CN202011058662A CN112212111B CN 112212111 B CN112212111 B CN 112212111B CN 202011058662 A CN202011058662 A CN 202011058662A CN 112212111 B CN112212111 B CN 112212111B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
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Abstract
A method for restraining pressure thrust of a corrugated pipe expansion joint by using electromagnetic force comprises the following steps: step one, constructing a constraint expansion joint: the constrained expansion joint comprises a first flange, a displacement sensor, a magnetic pole material, an electromagnet, a corrugated pipe, a controller, a pull rod, a pressure sensor, a magnetic insulation material, a second flange and a power supply, and the second step of constructing pressure thrust balance is as follows: under the working state, pressure thrust acts on the first flange and the second flange, the first flange and the second flange are simultaneously subjected to electromagnetic force generated by all magnetic pole materials and electromagnets, the controller controls the power supply to output different currents by analyzing received signals read by the displacement sensor and the pressure sensor, the electromagnetic force and the pressure thrust are equal in size and opposite in direction, and pressure thrust balance is achieved. The problems that the conventional constrained corrugated pipe expansion joint cannot compensate axial displacement, and the straight pipe pressure balance type corrugated pipe expansion joint has overlarge outer diameter, heavier weight and high manufacturing cost are solved.
Description
Technical Field
The invention relates to the technical field of expansion joints, in particular to a method for restraining pressure thrust of a corrugated pipe expansion joint by using electromagnetic force.
Background
In order to prevent the pressure thrust generated by the unconstrained corrugated pipe expansion joint from acting on equipment to cause damage to an equipment base and influence on normal operation of the equipment, the constrained or straight pipe pressure balance type corrugated pipe expansion joint is usually selected to constrain or balance the pressure thrust. The expansion joint of the hinge type (figure 1) is composed of a corrugated pipe, an end pipe and a group of constraint structural parts and is mainly used for absorbing angular displacement and constraining the pressure thrust of the corrugated pipe. The tie-rod type expansion joint (fig. 2) is composed of a working corrugated pipe, an end pipe and a group of constraint structural members, and is mainly used for absorbing transverse displacement and constraining the pressure thrust of the corrugated pipe. The constrained expansion joint utilizes a constrained structural member to constrain the pressure thrust. The existing straight pipe pressure corrugated pipe balanced expansion joint is divided into external pressure and internal pressure in a conventional mode. The external pressure type straight pipe pressure balance type expansion joint (figure 3) is composed of a group of working corrugated pipes and a group of balance corrugated pipes, and is mainly used for absorbing axial displacement and balancing the pressure thrust of the corrugated pipes. The internal pressure type straight pipe pressure balance type expansion joint (figure 4) is composed of two working corrugated pipes, a balance corrugated pipe in the middle, a pull rod, an end plate and other structural members, and is mainly used for absorbing axial pressure thrust of the corrugated pipes and balancing the pressure thrust of the corrugated pipes. The balance type expansion joint utilizes the principle that medium pressure intensity is isotropic and area is equal to increase a group of balance waves and balance pressure thrust of corresponding structural parts.
The conventional structure constraint type corrugated pipe expansion joint can only compensate angular displacement and transverse displacement, the axial displacement cannot be compensated, the straight pipe pressure balance type corrugated pipe expansion joint needs to be additionally provided with a group of balance waves for balancing pressure thrust besides a working wave which needs to be set to meet the requirement of displacement compensation for realizing pressure balance, corresponding constraint structural parts are added, and the manufacturing cost is relatively high. For the internal pressure type straight pipe pressure balance type expansion joint, the outer diameter of the balance wave is far larger than that of the working wave, so that the overall outer diameter of the expansion joint is too large, and the weight of equipment is heavy.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for restraining the pressure thrust of a corrugated pipe expansion joint by using electromagnetic force, which solves the problems that the conventional restraining corrugated pipe expansion joint cannot compensate axial displacement, and a straight pipe pressure balance type corrugated pipe expansion joint has overlarge outer diameter, heavier weight and high manufacturing cost.
In order to realize the technical purpose, the adopted technical scheme is as follows: a method for restraining pressure thrust of a corrugated pipe expansion joint by using electromagnetic force comprises the following steps:
step one, constructing a constraint expansion joint:
the constrained expansion joint comprises a first flange, a displacement sensor, magnetic pole materials, electromagnets, a corrugated pipe, a controller, a pull rod, a pressure sensor, a magnetism-insulating material, a second flange and a power supply, wherein two ends of the corrugated pipe are respectively connected with the first flange and the second flange, a plurality of magnetic pole materials are arranged on the end surface of the inner side of the first flange, a plurality of magnetic pole materials or magnetism-insulating materials are arranged on the end surface of the inner side of the second flange, each magnetic pole material corresponds to one electromagnet, an axial displacement gap is formed between each magnetic pole material and the corresponding electromagnet, the axial displacement gap is larger than the maximum working axial displacement of the expansion joint, the distance between the edge of each magnetic pole material and the edge of the corresponding electromagnet is larger than the maximum transverse working displacement of the expansion joint, the electromagnets on the inner side of the first flange are connected with the electromagnets on two sides of the flange or the magnetism-insulating material on the inner side of the second flange through the pull rod, and the displacement sensor for transmitting displacement signals to the controller is arranged on the excircle of the first flange, the pressure sensor measures the internal pressure of the expansion joint and transmits a pressure signal to the controller, the power supply supplies power to the displacement sensor, the pressure sensor, the electromagnet and the controller, and the controller controls the current in the electromagnet according to the displacement signal and the pressure signal;
step two, constructing pressure thrust balance:
under the working state, pressure thrust acts on the first flange and the second flange, the first flange and the second flange are simultaneously subjected to electromagnetic force generated by all magnetic pole materials and electromagnets, the controller controls the power supply to output different currents by analyzing received signals read by the displacement sensor and the pressure sensor, the electromagnetic force and the pressure thrust are equal in size and opposite in direction, and pressure thrust balance is achieved.
The concrete implementation method for constructing the pressure thrust balance comprises the following steps:
under the working state, the inside of the expansion joint is filled with a medium with pressure p, the displacement sensor reads the displacement of the flange, the pressure sensor reads the pressure p filled in the expansion joint, the controller receives a pressure signal, the pressure thrust F borne by the expansion joint is calculated through the built-in logic control module, and then the displacement sensor reads the axial displacement x of the expansion joint0And the pressure thrust F, the magnitude I of the current in the needed electromagnet coil is calculated, and the controller regulates the magnitude of the current by controlling the power supply to ensure the acting force nF between the magnetic pole material and the electromagnetMagnetic fieldEqual to the pressure thrust F, in order to achieve pressure thrust balance, a constrained bellows expansion joint structure must satisfy the following relationship:
nFmagnetic field＝F＝pAc (1)
FMagnetic field＝f(I；X；x0) (2)
In the formula
F is the pressure thrust on the expansion joint;
Fmagnetic field-the force between the pole material and the electromagnet;
ac-effective area of bellows;
n is the number of magnetic pole materials or the number of electromagnets;
p-the pressure of the medium in the bellows;
i-current in the electromagnet coil;
x is the axial displacement gap between the magnetic pole material and the electromagnet;
x0-axial displacement of the expansion joint;
the expansion joint is always in a pressure and thrust balanced state no matter in the original position or any axial and transverse deformation positions.
The invention has the beneficial effects that: the bellows expansion joint adopting the method cancels balance waves on the premise of not influencing the bearing and compensation capacity, effectively reduces the outer diameter of the expansion joint, restrains the pressure thrust of the bellows expansion joint, lightens the weight of the expansion joint and reduces the cost.
Drawings
FIG. 1 is a schematic structural view of a unitary hinge-type expansion joint;
FIG. 2 is a schematic structural view of a compound tension rod type expansion joint;
FIG. 3 is a schematic structural diagram of a conventional external pressure straight pipe pressure balance type expansion joint;
FIG. 4 is a schematic structural view of a conventional internal pressure straight pipe pressure-balanced expansion joint;
FIG. 5 is a schematic structural view of the present invention;
FIG. 6 is another schematic structural view of the present invention;
in the figure: 1. the magnetic field sensor comprises a first flange, a second flange, a displacement sensor, a magnetic pole material, a magnet, a corrugated pipe, a controller, a pull rod, a pressure sensor, a magnetic isolation material, a controller, a pressure sensor, a controller, a pull rod, a pressure sensor, a magnetic isolation material, a flange II, a power supply and a baffle 12.
Detailed Description
A method for restraining pressure thrust of a corrugated pipe expansion joint by using electromagnetic force comprises the following steps:
step one, constructing a constraint expansion joint:
as shown in fig. 5 and 6, the constrained expansion joint includes a first flange 1, a displacement sensor 2, a magnetic pole material 3, an electromagnet 4, a bellows 5, a controller 6, a pull rod 7, a pressure sensor 8, a magnetism-insulating material 9, a second flange 10 and a power supply 11, two ends of the bellows are respectively connected with the first flange 1 and the second flange 2 to form an axial expansion joint, the axial expansion joint is not limited to a structure formed by three components and meets the known standard of the axial expansion joint, a plurality of magnetic pole materials 3 are arranged on the inner side end face of the first flange 1, a plurality of magnetic pole materials 3 or magnetism-insulating materials 9 are arranged on the inner side end face of the second flange 10, each magnetic pole material 3 corresponds to one electromagnet 4, when two rods of the pull rod are connected with the electromagnets, the positions of the pull rod are fixed by using a baffle plate, and the same gap between the magnetic pole materials on two sides and the corresponding electromagnets is ensured, an axial displacement gap X is formed between the magnetic pole material 3 and the corresponding electromagnet 4, in order to avoid interference in the displacement process, the axial displacement gap is larger than the maximum working axial displacement of the expansion joint, the distance Y between the edge of the magnetic pole material and the edge of the corresponding electromagnet is larger than the maximum transverse working displacement of the expansion joint, the electromagnet on the inner side of the flange I is connected with the electromagnets on the two sides of the flange or the magnetism-insulating material on the inner side of the flange II through a pull rod, a displacement sensor for transmitting a displacement signal to a controller is arranged on the excircle of the flange I, a pressure sensor for measuring the internal pressure of the expansion joint can be arranged on the flange II or the flange I and transmits a pressure signal to the controller, a power supply supplies power to the displacement sensor 2, the pressure sensor 8, the electromagnet 4 and the controller 6, and the controller 6 controls the current in the electromagnet according to the displacement signal and the pressure signal;
step two, constructing pressure thrust balance:
under the working state, pressure thrust acts on the first flange and the second flange, the first flange and the second flange are simultaneously subjected to electromagnetic force generated by all magnetic pole materials and electromagnets, the controller controls the power supply to output different currents by analyzing received signals read by the displacement sensor and the pressure sensor, the electromagnetic force and the pressure thrust are equal in size and opposite in direction, and pressure thrust balance is achieved.
The concrete implementation method for constructing the pressure thrust balance comprises the following steps:
under the working state, the inside of the expansion joint is filled with a medium with pressure p, the displacement sensor reads the displacement of the flange, the pressure sensor reads the pressure p filled in the expansion joint, the controller receives a pressure signal, the pressure thrust F borne by the expansion joint is calculated through the built-in logic control module, and then the displacement sensor reads the axial displacement x of the expansion joint0And the pressure thrust F, the magnitude I of the current in the needed electromagnet coil is calculated, and the controller regulates the magnitude of the current by controlling the power supply to ensure the acting force nF between the magnetic pole material and the electromagnetMagnetic fieldEqual to the pressure thrust F, in order to achieve pressure thrust balance, a constrained bellows expansion joint structure must satisfy the following relationship:
nFmagnetic field＝F＝pAc (1)
FMagnetic field＝f(I；X；x0) (2)
In the formula
F is the pressure thrust on the expansion joint;
Fmagnetic field-the force between the pole material and the electromagnet;
ac-the effective area of the corrugated pipe (see GB/T12777-2019 standard for details);
n is the number of magnetic pole materials or the number of electromagnets;
p-the pressure of the medium in the bellows;
i-current in the electromagnet coil;
x is the axial displacement gap between the magnetic pole material and the electromagnet;
x0-axial displacement of the expansion joint;
the expansion joint is always in a pressure and thrust balanced state no matter in the original position or any axial and transverse deformation positions.
The displacement compensation mode is as follows:
(1) axial displacement occurs: axial compression displacement occurs to the pipeline, the first compression flange 1 and the second compression flange 10 move towards the middle of the expansion joint, the controller 6 controls the power supply 11 through analyzing received signals read by the displacement sensor 2 and the pressure sensor 8, so that the current of the coil of the electromagnet 4 is reduced, the electromagnetic force and the pressure thrust are equal in magnitude and opposite in direction, and pressure thrust balance is achieved. Axial stretching displacement occurs to the pipeline, the first stretching flange 1 and the second stretching flange 10 move towards the two ends of the expansion joint, the controller 6 controls the power supply 11 through analyzing received signals read by the displacement sensor 2 and the pressure sensor 8, so that the current of the coil of the electromagnet 4 is increased, the electromagnetic force and the pressure thrust are equal in magnitude and opposite in direction, and pressure thrust balance is achieved. According to the balance principle, the pressure balance state is always kept during the axial movement and when the axial movement reaches the displacement position.
(2) The transverse displacement is generated: the pipeline generates transverse displacement, the first flange 1 and the second flange 10 are pulled to relatively move in a staggered manner, the controller 6 controls the power supply 11 by analyzing received signals read by the pressure sensor 8, so that the current of the coil of the electromagnet 4 is kept constant, the electromagnetic force and the pressure thrust are equal in magnitude and opposite in direction, and pressure thrust balance is realized. According to the balance principle, the axial gap between the 3-pole material and the electromagnet 4 is not changed in the moving process, the current of the coil of the electromagnet 4 is constant, and the pressure balance state can be always kept.
Claims (2)
1. A method for restraining the pressure thrust of a corrugated pipe expansion joint by using electromagnetic force is characterized by comprising the following steps: the method comprises the following steps:
step one, constructing a constraint expansion joint:
the constrained expansion joint comprises a first flange, a displacement sensor, magnetic pole materials, electromagnets, a corrugated pipe, a controller, a pull rod, a pressure sensor, a magnetism-insulating material, a second flange and a power supply, wherein two ends of the corrugated pipe are respectively connected with the first flange and the second flange, a plurality of magnetic pole materials are arranged on the end surface of the inner side of the first flange, a plurality of magnetic pole materials or magnetism-insulating materials are arranged on the end surface of the inner side of the second flange, each magnetic pole material corresponds to one electromagnet, an axial displacement gap is formed between each magnetic pole material and the corresponding electromagnet, the axial displacement gap is larger than the maximum working axial displacement of the expansion joint, the distance between the edge of each magnetic pole material and the edge of the corresponding electromagnet is larger than the maximum transverse working displacement of the expansion joint, the electromagnets on the inner side of the first flange are connected with the electromagnets on two sides of the flange or the magnetism-insulating material on the inner side of the second flange through the pull rod, and the displacement sensor for transmitting displacement signals to the controller is arranged on the excircle of the first flange, the pressure sensor measures the internal pressure of the expansion joint and transmits a pressure signal to the controller, the power supply supplies power to the displacement sensor, the pressure sensor, the electromagnet and the controller, and the controller controls the current in the electromagnet according to the displacement signal and the pressure signal;
step two, constructing pressure thrust balance:
under the working state, pressure thrust acts on the first flange and the second flange, the first flange and the second flange are simultaneously subjected to electromagnetic force generated by all magnetic pole materials and electromagnets, the controller controls the power supply to output different currents by analyzing received signals read by the displacement sensor and the pressure sensor, the electromagnetic force and the pressure thrust are equal in size and opposite in direction, and pressure thrust balance is achieved.
2. A method of using electromagnetic force to constrain the pressure thrust of a bellows expansion joint as claimed in claim 1, wherein: the concrete implementation method for constructing the pressure thrust balance comprises the following steps:
under the working state, the inside of the expansion joint is filled with a medium with pressure p, the displacement sensor reads the displacement of the flange, the pressure sensor reads the pressure p filled in the expansion joint, the controller receives a pressure signal, the pressure thrust F borne by the expansion joint is calculated through the built-in logic control module, and then the displacement sensor reads the axial displacement of the expansion joint
And the pressure thrust F, the magnitude I of the current in the needed electromagnet coil is calculated, and the controller regulates the magnitude of the current by controlling the power supply to ensure the acting force between the magnetic pole material and the electromagnet
Equal to the pressure thrust F, in order to achieve pressure thrust balance, a constrained bellows expansion joint structure must satisfy the following relationship:
in the formula
F is the pressure thrust on the expansion joint;
ac-effective area of bellows;
n is the number of magnetic pole materials or the number of electromagnets;
p-the pressure of the medium in the bellows;
i-current in the electromagnet coil;
x is the axial displacement gap between the magnetic pole material and the electromagnet;
the expansion joint is always in a pressure and thrust balanced state no matter in the original position or any axial and transverse deformation positions.
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| CN202011058662.6A CN112212111B (en) | 2020-09-30 | 2020-09-30 | Method for restraining pressure thrust of expansion joint of corrugated pipe by using electromagnetic force |
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| CN202011058662.6A CN112212111B (en) | 2020-09-30 | 2020-09-30 | Method for restraining pressure thrust of expansion joint of corrugated pipe by using electromagnetic force |
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| CN115046065B (en) * | 2022-06-01 | 2024-01-19 | 中船双瑞(洛阳)特种装备股份有限公司 | Straight pipe pressure balance type corrugated pipe expansion joint with distributed floating structure |
| CN115183068A (en) * | 2022-07-28 | 2022-10-14 | 甘肃大亨通信息科技有限责任公司 | Pressure balance uses two-way compensation system based on ripple compensator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090016332A (en) * | 2007-08-10 | 2009-02-13 | 주식회사 에이치케이알 | System for monitoring gas leaking in expansion joint element and control method thereof |
| CN207779364U (en) * | 2017-11-13 | 2018-08-28 | 航天晨光股份有限公司 | It is a kind of to measure the axial device with angular displacement of FlexbleJoint |
| CN109555978A (en) * | 2018-12-10 | 2019-04-02 | 华东理工大学 | A kind of flange leakage on-Line Monitor Device based on ultrasonic acoustic generator |
| CN109838695A (en) * | 2019-01-23 | 2019-06-04 | 洛阳双瑞特种装备有限公司 | A kind of interior die mould expansion joint device for detecting axial displacement |
| CN111306392A (en) * | 2020-03-31 | 2020-06-19 | 沈阳晨光弗泰波纹管有限公司 | Expansion joint with displacement real-time monitoring function and large displacement compensation |
-
2020
- 2020-09-30 CN CN202011058662.6A patent/CN112212111B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090016332A (en) * | 2007-08-10 | 2009-02-13 | 주식회사 에이치케이알 | System for monitoring gas leaking in expansion joint element and control method thereof |
| CN207779364U (en) * | 2017-11-13 | 2018-08-28 | 航天晨光股份有限公司 | It is a kind of to measure the axial device with angular displacement of FlexbleJoint |
| CN109555978A (en) * | 2018-12-10 | 2019-04-02 | 华东理工大学 | A kind of flange leakage on-Line Monitor Device based on ultrasonic acoustic generator |
| CN109838695A (en) * | 2019-01-23 | 2019-06-04 | 洛阳双瑞特种装备有限公司 | A kind of interior die mould expansion joint device for detecting axial displacement |
| CN111306392A (en) * | 2020-03-31 | 2020-06-19 | 沈阳晨光弗泰波纹管有限公司 | Expansion joint with displacement real-time monitoring function and large displacement compensation |
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Address after: No.88, Binhe North Road, hi tech Zone, Luoyang City, Henan Province Patentee after: CSSC Shuangrui (Luoyang) special equipment Co.,Ltd. Address before: No.88, Binhe North Road, hi tech Zone, Luoyang City, Henan Province Patentee before: LUOYANG SUNRUI SPECIAL EQUIPMENT Co.,Ltd. |