CN111896240A - Bending moment loading device for valve end connection fire resistance test and using method - Google Patents
Bending moment loading device for valve end connection fire resistance test and using method Download PDFInfo
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- CN111896240A CN111896240A CN202010548768.8A CN202010548768A CN111896240A CN 111896240 A CN111896240 A CN 111896240A CN 202010548768 A CN202010548768 A CN 202010548768A CN 111896240 A CN111896240 A CN 111896240A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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Abstract
The device comprises a movable pushing mechanism, a valve clamping mechanism and a power mechanism, wherein the valve clamping mechanism is arranged on the movable pushing mechanism, the valve clamping mechanism comprises a left bending moment loading force arm and a right bending moment loading force arm which are erected on the movable pushing mechanism, a first flange for fixing a measured valve is respectively arranged at one end part of the left bending moment loading force arm and the right bending moment loading force arm, which are opposite, and a jacking pressure measuring assembly for adjusting the angle between the left bending moment loading force arm and the right bending moment loading force arm is arranged at the other end part of the left bending moment loading force arm and the right bending moment loading force arm, so that the power mechanism is driven to move and push the valve to be measured on the pushing mechanism to. This application orders about valve clamping mechanism seesaw through power unit, makes the measured valve business turn over furnace body, and the measured valve on the first flange both can receive the pulling force effect under jacking pressure measurement subassembly's effect, can receive the pressure action again to the realization is exerted moment of flexure to valve end connection.
Description
Technical Field
The invention belongs to the technical field of valve end connection fire resistance tests, and particularly relates to a bending moment loading device for a valve end connection fire resistance test and a using method.
Background
When the valve end connection in the petroleum and petrochemical industry is exposed to the surrounding flame environment, the heat transfer speed between the outside of the first flange and the bolt is faster than that between the sealing element and the inside of the first flange, the temperature gradient of a connection point is generated, the loss of the sealing pretightening force is caused, the contact pressure required by sealing is lost, meanwhile, the sealing gasket is not strong enough to bear the pressure load or the borne temperature exceeds the limit, the reduction of the joint rigidity is caused, the sealing failure phenomenon is caused, and the economic loss, the environmental damage and the major safety accident are caused. Therefore, the bending resistance and compression resistance design performance of the valve end connection needs to be verified through tests so as to be safely applied to the petroleum and petrochemical industry.
Disclosure of Invention
In order to realize the application of bending moment to the connection of the end part of the valve, the invention provides a bending moment loading device for a fire resistance test of the connection of the end part of the valve and a using method thereof. The invention adopts the following technical scheme:
valve end connection bending moment loading device for fire resistance test, including removing push mechanism, still including setting up valve clamping mechanism, the power unit on removing push mechanism, valve clamping mechanism is including erectting the left bending moment loading arm of force and the right bending moment loading arm of force on removing push mechanism, be provided with the fixed first flange of being surveyed the valve on the tip that left bending moment loading arm of force and right bending moment loading arm of force are relative respectively, another tip sets up the jacking pressure measurement subassembly of angle between the left bending moment loading arm of force of adjustment and the right bending moment loading arm of force, power unit orders about to remove push mechanism and goes up the valve of awaiting measuring and move at the external backword in the furnace body.
Specifically, the jacking pressure measuring assembly comprises an installation rod perpendicular to a right bending moment loading force arm, a first jacking component is arranged at the end of the installation rod, a pressure sensor is fixed on the side, facing the installation rod, of the left bending moment loading force arm, the jacking component points to the pressure sensor, and the first jacking component stretches in the horizontal direction.
Specifically speaking, the support column below of the left side moment of flexure loading arm of force and the right side moment of flexure loading arm of force all is provided with many support columns of fixing on removing pushing mechanism, the last supporting surface of support column is U type structure, and the corresponding moment of flexure loading arm of force can be in the length direction removal of the U type inslot perpendicular to moment of flexure loading arm of force, the upper surface in U type groove is provided with the heat insulating mattress that prevents moment of flexure loading arm of force up-and-down motion.
Specifically, the movable pushing mechanism comprises a movable plate and a second jacking component, one end of the second jacking component is arranged on the movable plate, and the other end of the second jacking component is connected with the outer side of the furnace body.
Specifically, the moving pushing mechanism further comprises wheels and a brake pedal which are arranged below the moving plate, and the wheels are arranged in the corresponding guide rails to move back and forth.
Specifically, the power mechanism is driven by hydraulic pressure, and an oil return filter is arranged on an oil path.
Specifically, the stroke of the first jacking component is not more than 500mm, and the jacking rod in the first jacking component can also stretch and retract after the tested valve is installed on the first jacking component.
Specifically, the valve clamping mechanism and the moving pushing mechanism are welded by adopting a 310S stainless steel high-temperature-resistant material steel plate.
Specifically, the method for calculating the drift diameter D of the valve to be measured by the remote control mechanism comprises the following steps:
s1, obtaining the force F applied by the first jacking component1And the pressure of the tested medium on the valve side F2Wherein the magnitude of the force exerted by the first jacking component is F1The calculation formula of (a) is as follows:
F1＝M/L
wherein: m is the maximum moment, and L is the moment arm;
the pressure of the tested medium on the valve side is F2The calculation formula of (a) is as follows:
F2＝πD2/4×P
wherein: p is the pressure of the test medium, and D is the drift diameter of the valve;
s2, according to the force applied by the first jacking part, the pressure of the tested medium on the valve side is consistent, namely F1＝F2Obtaining the drift diameter of the valve to be measured
The method for connecting the end part of the valve with the bending moment loading device for the fire resistance test is adopted, the power mechanism in the device further comprises a hydraulic motor pump set, a hydraulic valve set and an indicator lamp set, and the method comprises the following steps:
s1, starting a hydraulic pump starting button on an operating platform of the remote control mechanism, starting a hydraulic system in the power mechanism to work, and simultaneously, starting an indicator light of a hydraulic station in the power mechanism;
s2, pressing an oil cylinder extending button corresponding to the first jacking component to clamp the valve to be tested;
s3, pressing an oil cylinder extending button corresponding to the second jacking component, and moving the pushing mechanism to convey the valve to be detected to a station to be detected;
s4, after the detection is finished, pressing down an oil cylinder retraction button corresponding to the second jacking component, and moving the valve to be detected away from the detection position;
and S5, after the lifting device is lifted in place, pressing down an oil cylinder retraction button corresponding to the first jacking component, and closing a hydraulic pump button after one-time detection circulation is finished.
The invention has the advantages that:
(1) this application orders about valve clamping mechanism seesaw through power unit, makes the measured valve business turn over furnace body, fixes on left bending moment loading arm of force and right bending moment loading arm of force measured valve on the first flange both can receive the pulling force effect under jacking pressure measurement component's effect, can receive the pressure effect again to the realization is exerted the moment of flexure to valve end connection.
(2) The setting of installation pole can be applicable to the first jacking part of different strokes, does not need first jacking part at the flexible overlength of test procedure at every turn, practices thrift test time.
(3) The invention provides a bending moment loading mechanism for a valve end connection fire resistance test, wherein a tested valve clamping mechanism and a moving pushing mechanism are welded by high-temperature-resistant stainless steel plates, and meanwhile, a heat insulation asbestos pad is arranged between the tested valve clamping mechanism and the moving pushing mechanism, so that the damage of effective wall surface high-temperature heat conduction to other parts can be accurately ensured while the bending moment at the temperature of 700 ℃ is ensured.
(4) The second jacking component is used for guiding the movement direction of the valve clamping mechanism and determining the movement distance.
(5) The arrangement of the wheels and the guide rail can determine the direction of the second jacking component, and vertical acting force is generated on the second jacking component for preventing the direction from changing.
(6) The method for designing and calculating the parameters of the bending moment loading mechanism for the connection of the end part of the valve to the fire resistance test is obtained by adding actual use experience correction on the basis of theoretical derivation calculation, and can be applied to the design calculation of any parameter bending moment loading mechanism.
(7) The method controls the power mechanism to work through the remote control mechanism 6, and realizes the fixation and transportation of the valve to be tested during the fire resistance test.
Drawings
Fig. 1-2 are schematic structural views of the present invention.
The notations in the figures have the following meanings:
11-left bending moment loading moment arm 12-right bending moment loading moment arm 101-second flange
13-first flange
21-moving plate 22-supporting column 221-U-shaped groove 23-heat insulation pad 24-wheel
31-first jacking part 32-mounting rod 33-pressure sensor
41-second jacking component 42-adjusting part
5-hydraulic station 6-remote control mechanism 7-valve to be tested
Detailed Description
As shown in fig. 1-2, the end of the valve is connected with a bending moment loading device for fire resistance test, which comprises a movable pushing mechanism, and further comprises a valve clamping mechanism, a power mechanism and a remote control mechanism 6 which are arranged on the movable pushing mechanism. And the valve clamping mechanism and the movable pushing mechanism are welded by adopting a 310S stainless steel high-temperature-resistant material steel plate.
The valve clamping mechanism comprises a left bending moment loading force arm 11 and a right bending moment loading force arm 12 which are erected on the movable pushing mechanism, a first flange 13 for fixing the tested valve 7 is arranged on one end portion, opposite to the left bending moment loading force arm 11 and the right bending moment loading force arm 12, of the left bending moment loading force arm 11, a jacking pressure measuring assembly for adjusting the angle between the left bending moment loading force arm 11 and the right bending moment loading force arm 12 is arranged on the other end portion, and the power mechanism drives the valve to be tested to move back from the outside of the furnace body on the movable pushing mechanism. In this embodiment, the section of the left bending moment loading moment arm 11 and the right bending moment loading moment arm 12 close to the first flange 13 is connected with the adjacent section through the second flange 101, so that the first flange 13 can be replaced, and the valve testing device is suitable for different tested valves 7.
Jacking pressure measurement subassembly includes the installation pole 32 with the perpendicular setting of right moment loading arm of force 12, the tip of installation pole 32 is provided with first jacking part 31, left side moment loading arm of force 11 is fixed with pressure sensor 33 on the side towards installation pole 32, the directional pressure sensor 33 of jacking part, first jacking part 31 is flexible on the horizontal direction. The installation rod 32 and the right bending moment loading force arm 12 are of a vertical integrated structure, in the scheme, the first jacking part 31 is a hydraulic telescopic rod, and the hydraulic telescopic rod is communicated with an oil way of the hydraulic station 5 of the power mechanism. The stroke of the first jacking component 31 is not more than 500 mm.
The support column 22 below of the left side moment of flexure loading arm of force 11 and the right side moment of flexure loading arm of force 12 all is provided with many support columns 22 of fixing on removing pushing mechanism, the last supporting surface of support column 22 is U type structure, and the moment of flexure loading arm of force that corresponds can be in the length direction removal of the perpendicular to moment of flexure loading arm of force in U type groove 221, the upper surface of U type groove 221 is provided with the heat insulating mattress 23 that prevents moment of flexure loading arm of force up-and-down motion.
According to the valve 7 to be measured, the end part of the first flange 13 is installed by replacing the left bending moment loading force arm 11 and the right bending moment loading force arm 12 on the second flange 101, the valve 7 to be measured is fixed on the first flange 13 through a screw rod, at the moment, the telescopic rod of the first jacking part 31 is positioned in the middle of the oil cylinder and can extend out, so that the valve 7 to be measured on the first flange 13 is pressed, at the moment, the pressure sensor 33 can detect the pressure and can also shrink, and pulling force is applied to the valve 7 to be measured.
The movable pushing mechanism comprises a moving plate 21, a second jacking part 41, wheels 24 arranged below the moving plate 21 and a brake pedal, wherein one end of the second jacking part 41 is arranged on the moving plate 21, and the other end of the second jacking part is connected with the outer side of the furnace body. The wheels 24 are arranged to move back and forth in the respective guide rails. The second jacking part 41 is a hydraulic cylinder, and the hydraulic cylinder is communicated with an oil way of the hydraulic station 5 of the power mechanism. Specifically, the stroke of the second jacking member 41 is not more than 500 mm. One end of the second jacking component 41 is hinged with the furnace body, the other end of the second jacking component is hinged with the movable plate 21 through the adjusting part 42, the adjusting part 42 is a screw rod, the screw rod is used for adjusting the stroke of the second jacking component 41, and the second jacking component 41 is used for determining whether the valve 7 to be tested is positioned in the furnace body.
The power mechanism is driven by hydraulic pressure, and an oil return filter is arranged on an oil way.
The remote control mechanism 6 integrates the remote starting of the hydraulic pump and the remote adjustment of bending moment loading automatically; meanwhile, a digital display instrument is arranged to display the test pressure in real time. The method for calculating the drift diameter D of the valve to be measured by the remote control mechanism 6 comprises the following steps:
s1, obtaining the force F applied by the first jacking component 311And the pressure of the tested medium on the valve side F2Wherein the magnitude of the force F applied by the first jacking member 311The calculation formula of (a) is as follows:
F1＝M/L
wherein: m is the maximum moment, and L is the moment arm;
the pressure of the tested medium on the valve side is F2The calculation formula of (a) is as follows:
F2＝πD2/4×P
wherein: p is the pressure of the test medium, and D is the drift diameter of the valve;
s2, according to the magnitude of the force applied by the first jacking part 31, the pressure of the tested medium on the valve side is consistent, namely F1＝F2Obtaining the drift diameter of the valve to be measured
Specifically, the power mechanism further comprises a hydraulic motor pump set, a hydraulic valve group and an indicator lamp group, wherein the hydraulic valve group is used for controlling and adjusting the direction and the speed of an execution hydraulic cylinder, and the high-pressure pipeline filter is used for protecting system precision hydraulic elements from being damaged due to oil pollution.
Example 2
The method for connecting the end part of the valve in the embodiment 1 with the bending moment loading device for the fire resistance test comprises the following specific steps:
s1, starting a hydraulic pump starting button on an operation table of the remote control mechanism 6, starting a hydraulic system in the power mechanism to work, and simultaneously, starting an indicator lamp of a hydraulic station in the power mechanism to light;
s2, pressing an oil cylinder extending button corresponding to the first jacking part 31 to clamp the valve 7 to be tested;
s3, pressing an oil cylinder extending button corresponding to the second jacking component 41, and moving the trolley to convey the valve 7 to be detected to a station to be detected;
s4, after the detection is finished, pressing down an oil cylinder retraction button corresponding to the movable second jacking part 41, and moving the valve 7 to be detected away from the detection position;
and S5, after the lifting is in place, pressing down the oil cylinder retraction button corresponding to the first jacking part 31, and closing the hydraulic pump button after one-time detection circulation is finished.
When in the detection process, the opening regulator of the proportional valve can be adjusted in real time, and the pressure of the system is adjusted, so that the tension and the pressure of the oil cylinder corresponding to the first jacking part 31 are adjusted, and the pressure display instrument and the tension pressure digital display instrument are observed in the adjustment process. If an emergency situation occurs, a scram button can be pressed down, and the test is immediately terminated.
The invention is not to be considered as limited to the specific embodiments shown and described, but is to be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. Bending moment loading device for valve end connection fire resistance test, its characterized in that, including removing push mechanism, still including setting up valve clamping mechanism, the power unit on removing push mechanism, valve clamping mechanism is including erectting left bending moment loading arm of force (11) and right bending moment loading arm of force (12) on removing push mechanism, be provided with first flange (13) of fixed quilt survey valve (7) on the tip that left bending moment loading arm of force (11) and right bending moment loading arm of force (12) are relative respectively, another tip sets up the jacking pressure measurement subassembly of angle between adjustment left bending moment loading arm of force (11) and the right bending moment loading arm of force (12), power unit orders about to remove push mechanism and goes up the valve of awaiting measuring and move back in the external furnace body.
2. The bending moment loading device for the valve end connection fire resistance test according to claim 1, wherein the jacking pressure measuring assembly comprises a mounting rod (32) arranged perpendicular to the right bending moment loading arm (12), a first jacking component (31) is arranged at the end of the mounting rod (32), a pressure sensor (33) is fixed on the side surface of the left bending moment loading arm (11) facing the mounting rod (32), the jacking component points to the pressure sensor (33), and the first jacking component (31) stretches in the horizontal direction.
3. The bending moment loading device for the valve end connection fire resistance test according to claim 2, wherein a plurality of support columns (22) fixed on the movable pushing mechanism are arranged below the support columns (22) of the left bending moment loading force arm (11) and the right bending moment loading force arm (12), an upper support surface of each support column (22) is of a U-shaped structure, the corresponding bending moment loading force arm can move in the U-shaped groove (221) in the direction perpendicular to the length direction of the bending moment loading force arm, and a heat insulation pad (23) for preventing the bending moment loading force arm from moving up and down is arranged on the upper surface of the U-shaped groove (221).
4. The bending moment loading device for the valve end connection fire resistance test according to claim 1, wherein the moving pushing mechanism comprises a moving plate (21) and a second jacking component (41), one end of the second jacking component (41) is arranged on the moving plate (21), and the other end of the second jacking component is connected with the outer side of the furnace body.
5. The bending moment loading device for the valve end connection fire resistance test is characterized in that the moving pushing mechanism further comprises wheels (24) arranged below the moving plate (21), and the wheels (24) are arranged in corresponding guide rails to move back and forth.
6. The bending moment loading device for the valve end connection fire resistance test according to claim 4, wherein the power mechanism is hydraulically driven, and an oil return filter is arranged on an oil path.
7. The bending moment loading device for the valve end connection fire resistance test according to claim 2, wherein the stroke of the first jacking component (31) is not more than 500mm, and the jacking rod in the first jacking component (31) can also stretch after the tested valve (7) is installed on the first jacking component (31).
8. The bending moment loading device for the valve end connection fire resistance test according to claim 4, wherein the valve clamping mechanism and the movable pushing mechanism are welded by a steel plate made of 310S stainless steel and high-temperature resistant material.
9. The bending moment loading device for the fire resistance test of the valve end connection according to claim 7, further comprising a remote control mechanism (6), wherein the method for calculating the drift diameter D of the valve to be tested by the remote control mechanism (6) is as follows:
s1, obtaining the force F applied by the first jacking component (31)1And the pressure of the tested medium on the valve side F2Wherein the magnitude of the force F applied by the first jacking member (31)1The calculation formula of (a) is as follows:
F1＝M/L
wherein: m is the maximum moment, and L is the moment arm;
the pressure of the tested medium on the valve side is F2The calculation formula of (a) is as follows:
F2＝πD2/4×P
wherein: p is the pressure of the test medium, and D is the drift diameter of the valve;
s2, according to the magnitude of the force applied by the first jacking part (31), the pressure of the tested medium on the valve side is consistent, namely F1＝F2Obtaining the drift diameter of the valve to be measured
10. The method for connecting the end part of the valve with the bending moment loading device for the fire resistance test according to any one of claims 1 to 9, wherein the power mechanism in the device further comprises a hydraulic motor pump set, a hydraulic valve set and an indicator lamp set, and the method comprises the following steps:
s1, starting a hydraulic pump starting button on an operation platform of the remote control mechanism (6), starting a hydraulic system in the power mechanism to work, and simultaneously, starting an indicator lamp of a hydraulic station in the power mechanism to light;
s2, pressing an oil cylinder extending button corresponding to the first jacking part (31) to clamp the valve (7) to be tested;
s3, pressing an oil cylinder extending button corresponding to the second jacking component (41), and moving the pushing mechanism to convey the valve (7) to be detected to a station to be detected;
s4, after the detection is finished, pressing down an oil cylinder retraction button corresponding to the second jacking component (41), and moving the valve (7) to be detected away from the detection position;
and S5, after the lifting is in place, pressing down an oil cylinder retraction button corresponding to the first jacking component (31), and closing a hydraulic pump button after one-time detection circulation is finished.
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| CN202010548768.8A CN111896240B (en) | 2020-06-16 | 2020-06-16 | Bending moment loading device for valve end connection fire resistance test and using method |
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| CN202010548768.8A CN111896240B (en) | 2020-06-16 | 2020-06-16 | Bending moment loading device for valve end connection fire resistance test and using method |
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| CN111896240B CN111896240B (en) | 2022-04-08 |
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