CN103308293B - A kind of high temperature valve detection experiment system - Google Patents

A kind of high temperature valve detection experiment system Download PDF

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Publication number
CN103308293B
CN103308293B CN201310184234.1A CN201310184234A CN103308293B CN 103308293 B CN103308293 B CN 103308293B CN 201310184234 A CN201310184234 A CN 201310184234A CN 103308293 B CN103308293 B CN 103308293B
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China
Prior art keywords
valve
main conduit
storage tank
temperature
tank
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Expired - Fee Related
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CN201310184234.1A
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Chinese (zh)
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CN103308293A (en
Inventor
喻九阳
郑鹏
郑小涛
林纬
徐成
叶萌
龚程
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SNITE (HUBEI) INDUSTRIAL MANUFACTURING Co Ltd
Wuhan Institute of Technology
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SNITE (HUBEI) INDUSTRIAL MANUFACTURING Co Ltd
Wuhan Institute of Technology
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Priority to CN201310184234.1A priority Critical patent/CN103308293B/en
Publication of CN103308293A publication Critical patent/CN103308293A/en
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Publication of CN103308293B publication Critical patent/CN103308293B/en
Expired - Fee Related legal-status Critical Current
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Abstract

The invention discloses a kind of high temperature valve detection experiment system, it comprises oil-feed pump, storage tank, forcing pump, surge tank, pick-up unit, condensing unit; At the top of storage tank, electric heater, pressure unit are installed; The bottom of storage tank is connected with surge tank by the 3rd main conduit, and the madial wall of surge tank is provided with pressure unit and temperature sensor, and surge tank is connected with the oiler of valve to be measured by the 4th trunk pipeline; Described pick-up unit comprises monitor station, torsion-testing apparatus, and the valve rod of described valve to be measured is connected with torsion-testing apparatus, and the oil-out of valve to be measured is connected with storage tank by the 5th main conduit, condensing unit, the second main conduit successively.Structure of the present invention is simple, easy to operate, and can carry out resistance coefficient test, torsional performance test to high temperature valve, discharge characteristic test and amount of leakage detect.

Description

A kind of high temperature valve detection experiment system
Technical field
The present invention relates to a kind of high temperature valve detection experiment system.
Background technology
Valve is the control device of fluid circuit, and its basic function is the circulation switching on or off pipeline medium, changes the flow direction of medium, regulates pressure and the flow of medium, the normal operation of the equipment of protection pipeline.
The extensive application of industrial valve is after watt invention steam engine, over nearly twenty or thirty year, due to the needs of the aspects such as oil, chemical industry, power station, metallurgy, boats and ships, nuclear energy, universe, valve is had higher requirement, impel people to study and produce the valve of high parameter, its working temperature from ultralow temperature-269 DEG C to high temperature 1200 DEG C, even up to 3430 DEG C.
The valve manufacturing enterprise of current most domestic, when particularly high temperature valve carries out factory inspection to valve, only relates to the inspections such as material, outward appearance, size, structure, pressure, leakage usually, does not test its negotiability under high-temperature medium.
High temperature valve is widely used in oil refining industry, and circulation medium is flue gas or cracking wet goods.Before high temperature valve enterprise domestic at present externally provides product, owing to lacking the checkout equipment in high-temperature medium negotiability, corresponding supplemental characteristic cannot be provided, as valve, under high-temperature medium, well whether switch performance, whether leakage is serious, whether negotiability is normal, thus directly have influence on the core competitiveness of domestic high temperature valve product.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of structure simple for the technical matters existed in above-mentioned prior art, resistance coefficient test, torsional performance test can be carried out, the high temperature valve detection experiment system that discharge characteristic test and amount of leakage detect to high temperature valve.
The technical solution adopted in the present invention is: a kind of high temperature valve detection experiment system, is characterized in that comprising oil-feed pump, storage tank, forcing pump, surge tank, pick-up unit, condensing unit; At the top of storage tank, electric heater, pressure unit are installed, at the madial wall of storage tank, temperature sensor are installed; The bottom of storage tank is connected with surge tank by the 3rd main conduit, 3rd main conduit is provided with forcing pump and non-return valve, at the top of surge tank, electric heater is installed, the madial wall of surge tank is provided with pressure unit and temperature sensor, and surge tank is connected with the oiler of valve to be measured by the 4th main conduit;
Described pick-up unit comprises monitor station, torsion-testing apparatus, monitor station is provided with valve to be measured, the valve rod of described valve to be measured is connected with torsion-testing apparatus, and the 4th main conduit at the oiler place of valve to be measured is provided with stop valve, flowmeter, pressure unit;
The oil-out of valve to be measured is connected with storage tank by the 5th main conduit, condensing unit, the second main conduit successively, and the 5th main conduit arranges pressure unit, stop valve.
By technique scheme, described torsion-testing apparatus comprises support, support is provided with electric actuator, torque sensor, and the output shaft of electric actuator is connected with torque sensor by shaft coupling, and the output shaft of torque sensor is connected by the valve rod of shaft coupling with valve to be measured.
By technique scheme, described electric actuator is provided with angle Stroke Displacement Transducer.
By technique scheme, described condensing unit comprises tank, coiled pipe, and the water inlet of tank upper end is connected with water inlet pipe, and water inlet pipe is provided with intake pump, and the water delivering orifice of bottom of gullet is connected with rising pipe, and rising pipe sets out water pump; Coiled pipe is positioned at tank, and the bottom of coiled pipe is connected with the 5th main conduit by flange, and the upper end of coiled pipe is connected with the second main conduit (22) by flange.
By technique scheme, condensing unit is also communicated with surge tank by branch flow pipe, and branch flow pipe is provided with stop valve, pressure maintaining valve, bend pipe expansion joint.
By technique scheme, the 5th described main conduit is also provided with Leak Detection pipeline, and Leak Detection pipeline is provided with stop valve.
By technique scheme, at the top of storage tank, safety valve and vent valve are also installed, the top of storage tank is provided with the first oil supply hole, the side of storage tank is provided with the second oil supply hole, the oil-out of oil-feed pump is communicated with the first oil supply hole of storage tank by the first main conduit, the first main conduit is provided with non-return valve; The bottom of storage tank is connected with the oil-drain pipe installing stop valve; Second main conduit is communicated with the second oil supply hole of storage tank, and the second main conduit is provided with non-return valve.
By technique scheme, at the top of surge tank, electric heater and safety valve are installed.
By technique scheme, described monitor station is the cement pedestal of rectangular parallelepiped.
Beneficial effect acquired by the present invention is:
1, structure of the present invention is simple, and can carry out resistance coefficient test, torsional performance test to the high temperature valve of different size, discharge characteristic test and amount of leakage detect, and test specification is wide, degree of accuracy is high;
2, the present invention is with low cost, easy to operate, practical.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of torsion-testing apparatus in Fig. 1.
Fig. 3 is control principle schematic diagram of the present invention.
In figure: 1, oil-feed pump; 2, non-return valve; 3, temperature sensor; 4, vent valve; 5, electric heater; 6, safety valve; 7, storage tank; 8, pressure maintaining valve; 9, forcing pump; 10, bend pipe expansion joint; 11, pressure unit; 12, surge tank; 13, stop valve; 14 electric actuator; 15, torsion-testing apparatus; 16, valve to be measured; 17, monitor station; 18, flowmeter; 19, water pump is gone out; 20, condensing unit; 21, intake pump; 22, the second main conduit.23, branch flow pipe; 24, shaft coupling; 25, bearing seat; 26, torque sensor; 27, valve rod; 28, support; 29, storage tank temperature-shrink crack; 30, storage tank pressure digital display instrument; 31, surge tank temperature-shrink crack; 32, buffer tank pressure digital display instrument; 33, oil storage tank heater switch; 34, buffer tank heater button; 35, forcing pump switch; 36, pressure maintaining valve switch; 37, oil-feed pump switch; 38, intake pump switch; 39, pump switch is gone out; 40, signal transmitting device; 41, processor; 42, data acquisition unit.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 shows the structural representation of an embodiment provided by the invention, as shown in Figure 1, the high temperature valve detection experiment system that the present embodiment provides comprises oil-feed pump 1, storage tank 7, forcing pump 9, surge tank 12, pick-up unit, condensing unit, data acquisition system (DAS), control system.Be provided with electric heater 5, pressure unit 11, safety valve 6 and vent valve 4 at the top of storage tank 7, be provided with temperature sensor 3 at the madial wall of storage tank 7, bottom is connected with the oil-drain pipe installing stop valve 13.The top of storage tank is provided with the first oil supply hole, and the side of storage tank is provided with the second oil supply hole, and the oil-out of oil-feed pump 1 is communicated with the first oil supply hole of storage tank 7 by the first main conduit, the first main conduit is provided with non-return valve 2.The bottom of storage tank 7 is connected with surge tank 12 by the 3rd main conduit, 3rd main conduit is provided with forcing pump 9 and non-return valve 2, the effect of forcing pump 9 is for whole medium circulation system provides power, the effect of non-return valve prevents the medium back flow in surge tank 12, wherein, the volume of surge tank 12 is less than the volume of storage tank 7, electric heater 5 and safety valve 6 are installed at the top of surge tank 12, the madial wall of surge tank 12 is provided with pressure unit 11 and temperature sensor 3, is provided with the oil-drain pipe installing stop valve 13 in the bottom of surge tank 12.Surge tank 12 is connected with the oiler of valve 16 to be measured by the 4th main conduit.
Described pick-up unit comprises monitor station 17, torsion-testing apparatus 15, described monitor station 17 is the cement pedestal of rectangular parallelepiped, monitor station 17 is provided with valve 16 to be measured, the valve rod of described valve to be measured 16 is connected with torsion-testing apparatus, 4th main conduit at the oiler place of valve 16 to be measured is provided with stop valve 13, flowmeter 18, pressure unit 11, the oil-out of valve to be measured is connected with the 5th main conduit, 5th main conduit arranges pressure unit 11, stop valve 13, described flowmeter 18 reaches the target type meter (act on measuring channel center with test fluid and perpendicular to the power on the disk (target) of flow direction to measure the flowmeter of fluid strength) of 700 DEG C for heatproof.
The structural representation of torsion-testing apparatus 15 as shown in Figure 2, on the monitor station 17 that torsion-testing apparatus is vertically placed, described torsion-testing apparatus comprises support 28, support 28 is provided with electric actuator 14, bearing seat 25, torque sensor 26, the output shaft of electric actuator 14 is connected with torque sensor 26 by shaft coupling 24, and the output shaft of torque sensor 26 is connected with the valve rod 27 of valve to be measured by shaft coupling 24.Electric actuator is provided with angle Stroke Displacement Transducer.
Described condensing unit bag 20 draws together tank, coiled pipe, and the water inlet of tank upper end is connected with water inlet pipe, and water inlet pipe is provided with intake pump 21, and the water delivering orifice of bottom of gullet is connected with rising pipe, rising pipe sets out water pump 19.Coiled pipe is positioned at tank, coiled pipe upwards coils from bottom of gullet, the bottom of coiled pipe is connected with the 5th main conduit by flange, the upper end of coiled pipe is connected with the second main conduit 22 by flange, wherein the flow of intake pump 21 will be a bit larger tham the flow of water pump 19, its object is to compensate high-temperature medium and flows through the evaporation capacity that coiled pipe and water carries out heat interchange and produce.
Second main conduit 22 is communicated with the second oil supply hole of storage tank 7, and the second main conduit 22 is provided with non-return valve 2, forms closed circuit.
Wherein, the 5th main conduit is also communicated with surge tank 12 by branch flow pipe 23, and branch flow pipe 23 is provided with stop valve 13, pressure maintaining valve 8, bend pipe expansion joint 10.The object installing pressure maintaining valve 8 ensures that the high-temperature medium in surge tank flows out along the 4th main conduit, the 5th main conduit, the second main conduit 22 with constant pressure, the extra-stress that bend pipe expansion joint 10 causes for compensating pipeline internal cause temperature difference as a kind of flexible structure, can prevent pipeline damage.The 5th described main conduit is also provided with Leak Detection pipeline, and Leak Detection pipeline is provided with stop valve 13.
Described control system is for controlling the switch of each electrical equipment, described set-up of control system, on switch board, switch board is provided with storage tank temperature-shrink crack 29, storage tank pressure digital display instrument 30, surge tank temperature-shrink crack 31, buffer tank pressure digital display instrument 32, oil storage tank heater switch 33, buffer tank heater button 34, forcing pump switch 35, pressure maintaining valve switch 36, oil-feed pump switch 37, intake pump switch 38, goes out pump switch 39, signal transmitting device 40.Data acquisition system (DAS) comprises data acquisition unit and processor 41, and signal transmitting Qi40Jiang Ge road signal is sent to data acquisition unit 42, each road signal that processor 41 sends for being in data acquisition unit 42.In the present embodiment, processor 41 adopts computing machine to realize.
In the present embodiment, select lubricating oil as the fluid media (medium) of the circulation system, containing flame-retardant additive in its composition, maximum temperature can reach 650 DEG C, and be delivered in storage tank 7 by oil-feed pump 1, volume is about 2/3rds of tank body.Switch board is pressed electrical heating switch 33, and the electric heater in storage tank is started working, before switch board, then observe the registration of storage tank temperature-shrink crack 29.When the oil temperature in storage tank rises to 350 DEG C, starting pressure switch pump 35 on switch board immediately.According to the flow of forcing pump and the volume of surge tank, control the opening time well, the closing presure pump when surge tank is filled just.Then open buffer tank heater button 34, the oil in surge tank continues to be heated.After oil temperature reaches 650 DEG C, starting pressure pump 9 again.
After completing the preheating of lubricating oil, under the effect of forcing pump 9, valve to be measured 16 from buffering tank top along the 3rd main conduit, the 4th main conduit successively through monitor station of the high temperature oil of 650 DEG C and condensing unit 20, finally again get back to storage tank 7 and complete whole circulation.Wherein, when the pressure in surge tank 12 is greater than 3Mpa, lubricating oil in surge tank flows in storage tank 7 from branch flow pipe 23 through pressure maintaining valve 8 and condensing unit 20, makes the pressure on the 3rd main conduit, the 4th main conduit, the second main conduit 22 remain at 3Mpa.
Due to domestic market be applicable to water, the high-temperature pump maximum temperature of wet goods medium can only reach 450 DEG C, therefore high temperature oil is cooled to less than 450 DEG C by condensing unit 20, the safe handling of guarantee whole system flowing through monitor station.
In the present embodiment, the content measurement of valve to be measured comprises resistance coefficient test, torsional performance test, discharge characteristic test and leakage test.
The resistance coefficient of valve depend on the size of valve, structure and cavity shape, its computing formula is: , in formula, for pressure differential before and after valve; A is valve plate area; Q is pipeline flow; G is acceleration of gravity.In process of the test, pressure in hold-up vessel is remained on 3MPa, test needs the amount recorded to be flow in valve relative opening degree, upstream pressure, downstream pressure, pipe.By the relative opening degree of the slow control valve of electric actuator 14, scope from 0 ~ 100%, by the above-mentioned data to be measured of the Real-time Collection of data acquisition unit 42, the resistance coefficient figure after computation and analysis thus under obtaining valve different opening to be measured.
In the torsional performance test process of valve, the amount recorded is needed to be the angle of valve opening, and the moment of torsion of corresponding aperture lower valve rod.On data acquisition unit, the angle variation range of valve electric actuator to be measured is limited to 0 ~ 90 °, the angle of the unlatching in valve opening and closing process is measured by the angle Stroke Displacement Transducer in electric actuator, control the angle of rotating in valve opening and closing process to be measured on computers, thus the torque value obtained under each angle, the aperture-torque diagram drawing valve to be measured is arranged through KingView software analysis.
The discharge characteristic of valve is the relation of finer opening and flow.In the present embodiment, high temperature oil after hold-up vessel 7 and surge tank 12 heat and forcing pump 9 and pressure maintaining valve 8 act on constant 3Mpa pressure current through valve to be measured, in process of the test, need the amount recorded to be the relative opening degree of valve and the reading of high-temperature stream gauge.Relative opening degree in valve opening and closing process is measured by the angle Stroke Displacement Transducer in electric actuator, and the data on flows recorded with flowmeter self-sensor device reaches computing machine after data acquisition unit 42, draws the rating curve of valve to be measured after finishing analysis.
In the present embodiment, the leakage rate of valve to be measured adopts and quantitatively detects, namely high temperature grease closes valve plate to be measured completely in cyclic process, open cement pedestal side and be positioned at the stop valve switch on Leak Detection pipeline, medium whether is had to flow out in sighting tube, if any, then after cooling it is weighed and can obtain the leakage rate of valve to be measured.

Claims (9)

1. a high temperature valve detection experiment system, is characterized in that comprising oil-feed pump (1), storage tank (7), forcing pump (9), surge tank (12), pick-up unit, condensing unit (20); Electric heater (5), pressure unit (11) are installed at the top of storage tank (7), at the madial wall of storage tank (7), temperature sensor (3) are installed; The bottom of storage tank (7) is connected with surge tank (12) by the 3rd main conduit, 3rd main conduit is provided with forcing pump (9) and non-return valve (2), at the top of surge tank (12), electric heater is installed, the madial wall of surge tank (12) is provided with pressure unit (11) and temperature sensor (3), and surge tank (12) is connected by the oiler of the 4th main conduit with valve to be measured (16);
Described pick-up unit comprises monitor station (17), torsion-testing apparatus (15), monitor station (17) is provided with valve to be measured (16), the valve rod of described valve to be measured (16) is connected with torsion-testing apparatus, and the 4th main conduit at the oiler place of valve to be measured (16) is provided with stop valve (13), flowmeter (18), pressure unit (11);
The oil-out of valve to be measured is connected with storage tank (7) by the 5th main conduit, condensing unit, the second main conduit (22) successively, the 5th main conduit is arranged pressure unit (11), stop valve (13).
2. a kind of high temperature valve detection experiment system according to claim 1, it is characterized in that, described torsion-testing apparatus comprises support (28), support (28) is provided with electric actuator (14), torque sensor (26), the output shaft of electric actuator (14) is connected with torque sensor (26) by shaft coupling (24), and the output shaft of torque sensor (26) is connected with the valve rod (27) of valve to be measured by shaft coupling (24).
3. a kind of high temperature valve detection experiment system according to claim 2, it is characterized in that, described electric actuator is provided with angle Stroke Displacement Transducer.
4. a kind of high temperature valve detection experiment system according to claim 1, it is characterized in that, described condensing unit (20) comprises tank, coiled pipe, the water inlet of tank upper end is connected with water inlet pipe, water inlet pipe is provided with intake pump (21), the water delivering orifice of bottom of gullet is connected with rising pipe, rising pipe sets out water pump (19); Coiled pipe is positioned at tank, and the bottom of coiled pipe is connected with the 5th main conduit by flange, and the upper end of coiled pipe is connected with the second main conduit (22) by flange.
5. a kind of high temperature valve detection experiment system according to claim 1, it is characterized in that, condensing unit (20) is also communicated with surge tank (12) by branch flow pipe (23), and branch flow pipe (23) is provided with stop valve (13), pressure maintaining valve (8), bend pipe expansion joint (10).
6. a kind of high temperature valve detection experiment system according to claim 1, is characterized in that, the 5th described main conduit is also provided with Leak Detection pipeline, and Leak Detection pipeline is provided with stop valve (13).
7. a kind of high temperature valve detection experiment system according to claim 1, it is characterized in that, safety valve (6) and vent valve (4) are also installed at the top of storage tank (7), the top of storage tank is provided with the first oil supply hole, the side of storage tank is provided with the second oil supply hole, the oil-out of oil-feed pump (1) is communicated with the first oil supply hole of storage tank (7) by the first main conduit, the first main conduit is provided with non-return valve (2); The bottom of storage tank (7) is connected with the oil-drain pipe installing stop valve (13); Second main conduit (22) is communicated with the second oil supply hole of storage tank (7), the second main conduit (22) is provided with non-return valve (2).
8. a kind of high temperature valve detection experiment system according to claim 1, is characterized in that, is provided with electric heater (5) and safety valve (6) at the top of surge tank (12).
9. a kind of high temperature valve detection experiment system according to claim 1, is characterized in that, the cement pedestal that described monitor station (17) is rectangular parallelepiped.
CN201310184234.1A 2013-05-17 2013-05-17 A kind of high temperature valve detection experiment system Expired - Fee Related CN103308293B (en)

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