CN101446510B - Multi-functional multi-specimen sealing gasket service life evaluation testing apparatus - Google Patents
Multi-functional multi-specimen sealing gasket service life evaluation testing apparatus Download PDFInfo
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- CN101446510B CN101446510B CN2008102441431A CN200810244143A CN101446510B CN 101446510 B CN101446510 B CN 101446510B CN 2008102441431 A CN2008102441431 A CN 2008102441431A CN 200810244143 A CN200810244143 A CN 200810244143A CN 101446510 B CN101446510 B CN 101446510B
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Abstract
The invention relates to a multi-functional multi-specimen sealing gasket service life evaluation testing apparatus which comprises a gasket loading and load measuring system (56) and a medium given system (51). The apparatus is characterized in that the air given end of the medium given system (51) is connected with the air inlet end of a medium sealing system (53), the medium sealing system (53) is positioned inside of a temperature controlling and measuring system (54), a cooling thermal insulation system (57) is placed above the medium sealing system (53), and a leakage rate measuring system (55) is positioned on one side of the temperature controlling and measuring system (54); the medium sealing system (53), the temperature controlling and measuring system (54) and the cooling thermal insulation system (57) are connected respectively through stress bolts (14) of the gasket loading and load measuring system (56); and a data acquisition and control system (52) is respectively and electrically connected with the medium given system (51), the medium sealing system (53), the temperature controlling and measuring system (54), the leakage rate measuring system (55) and the cooling thermal insulation system (57).
Description
Technical field
The present invention relates to technical field of sealing technology, especially a kind of employing new construction and high-precision sensor are measured the gasket seal performance parameter, carry out accelerated life test, and can accurately predict the multi-functional multi-specimen sealing gasket service life evaluation testing apparatus in its life-span.
Background technology
The equipment that the bolt flange gasket seal is widely used in process industrial is with during pipeline is connected, and pad is the key element that influence connects sealing property.The sealing of fluid is by closely contact mutually between flange and pad, and the elastic-plastic deformation of dependence pad reduces or stops up leakage path, realizes with the increase resistance to flow.
Although occurred the evaluation method in many gasket seal life-spans, but these methods mainly concentrate on theory of mechanics derivation and the test specimen quantity experimental study basis seldom, Shang Weiyou and engineering be actual, and what match is judging basis with the slip index, sets up probability statistics model and corresponding test method and device based on more test figure at the randomness in gasket seal life-span.
Gasket seal can be divided into metal, non-metallic gasket and metal-nonmetal combined type pad usually.The pad of being made by nonmetallic materials is with its low price, easily manufactured, advantage such as performance is become better and better half of the country in occupation of the static seal field.But a lot of nonmetallic materials are aging easily, material mechanical performance reduces directly can cause seal failure, therefore non-metallic gasket and metal-nonmetal combined type pad are carried out life prediction, take proper prophylactic methods early, can avoid the generation of serious accident, have the important engineering meaning.
In sum, the durability test research of gasket seal is very important.Development perfect in shape and function, measuring accuracy height, the cheap durability test evaluating apparatus of experimentation cost have far reaching significance.
Summary of the invention
The objective of the invention is to disperse at existing gasket seal test unit function, shortcomings such as test specimen quantity is few, propose a kind of employing new construction and high-precision sensor and measure the gasket seal performance parameter, carry out accelerated life test, and can accurately predict the multi-functional multi-specimen sealing gasket service life evaluation testing apparatus in its life-span.
Technical scheme of the present invention is:
A kind of multi-functional multi-specimen sealing gasket service life evaluation testing apparatus, comprise that pad loads and load measuring system 56 is given fixed system 51 with medium, described medium is connected for the gas end of giving of fixed system 51 with the inlet end of medium-tight system 53, medium-tight system 53 is positioned at the inside of temperature control and measuring system 54, cooling insulation system 57 places medium-tight system 53 tops, and slip measuring system 55 is positioned at a side of temperature control and measuring system 54; Medium-tight system 53, temperature control all load by pad with cooling insulation system 57 with measuring system 54 and are connected with the stressed bolt 14 of load measuring system 56; Data Acquisition and Conversion System (DACS) 52 respectively and medium give fixed system 51, medium-tight system 53, temperature control with measuring system 54, slip measuring system 55 with cool off between the insulation system 57 and be electrically connected; Described medium-tight system 53 comprises several sealed section 11, abutment sleeve 13, gland bolt 29, gland 30, filler 31, stuffing-box 32, be connected with gland 30, filler 31, stuffing-box 32 and several sealed section 11 on the abutment sleeve 13 from top to bottom in turn, gland 30 is provided with gland bolt 29, and gland bolt 29 is threaded with stuffing-box 32; Described seal section 11 comprises annular seal space 26, connects pad 33, upper flange 34, test pad 35; Several sealed section 11 is connected in series successively, wherein the lower flange 36 of at least one seal section 11 is provided with medium draft tube 10, the air intake opening of medium draft tube 10 is the inlet end of medium-tight system 53, the lower flange 36 of at least one seal section 11 is provided with medium escape pipe 6, and the gas outlet of medium escape pipe 6 is the outlet side of medium-tight system 53; Abutment sleeve 13 bottoms are provided with the annular projection, and the annular projection is connected with at least one lower flange 36; Upper flange 34 is provided with boss, and lower flange 36 is provided with concave station, and the concave station of one or more lower flanges 36 is provided with medium escape pipe connector.
Described pad loads with load measuring system 56 and comprises loading nut 1, base 7, clamp nut 8, stressed bolt 14, stressed ring 15, tension-compression sensor 17 and boosting-rod 19, stressed bolt 14 connects clamp nut 8, base 7, stressed ring 15, tension-compression sensor 17 successively from bottom to top and loads nut 1, the signal output part of tension-compression sensor 17 connects the gasket load collection terminal of Data Acquisition and Conversion System (DACS) 52, load nut 1 and be provided with some holes, be provided with boosting-rod 19 in one or more holes.
Be provided with thrust ball bearing 18 between described loading nut 1 and the tension-compression sensor 17; Be provided with packing seal 4 between stressed ring 15 and the medium-tight system 53, base 7 is provided with floor spacer seat 9.
Described medium comprises high pressure gas holder pressure transducer 20 for fixed system 51, valuator 21, buffer tank pressure transducer 22, buffer tank valve 23, annular seal space valve 24, air-supply valve door 25, buffer tank 27 and high pressure gas holder 28, the gas outlet of high pressure gas holder 28 is communicated with an end that connects high pressure gas holder pressure transducer 20 and valuator 21 respectively, the other end of valuator 21 is communicated with respectively and connects buffer tank pressure transducer 22, the air intake opening of buffer tank 27 and buffer tank valve 23, the other end of buffer tank valve 23 is communicated with and connects annular seal space valve 24 and air-supply valve door 25, and what air-supply valve door 25 connected that media give fixed system 51 gives the gas end; The other end of annular seal space valve 24 is communicated with and connects annular seal space 26, and high pressure gas holder pressure transducer 20 and the signal output part of buffer tank pressure transducer 22 are connected the high pressure gas holder pressure acquisition end and the buffer tank pressure acquisition end of Data Acquisition and Conversion System (DACS) 52 respectively.
Described slip measuring system 55 comprises external pressure pad 37, the chamber 38 of leaking hunting, interior pressure pad sheet 39, inner pressure ring 40, dormant bolt 41, sealing skin 42, outer press ring 43, temperature sensor 44 and micro-pressure sensor 45, external pressure pad 37 is provided with sealing skin 42 with interior pressure pad sheet 39, and the cavity between external pressure pad 37, interior pressure pad sheet 39 and the sealing skin 42 constitutes the chamber 38 of leaking hunting; The outlet side of medium-tight system 53 is provided with temperature sensor 44 and micro-pressure sensor 45, the temperature signal output terminal of temperature sensor 44 and micro-pressure sensor 45 and micro-pressure signal output terminal be connected respectively Data Acquisition and Conversion System (DACS) 52 leak hunting the cavity temperature collection terminal with leak hunting chamber minute-pressure collection terminal.
Described temperature control comprises thermopair 5, electric furnace 12, test cavity 46, temperature controller 47 with measuring system 54, electric furnace 12 is an opposite opened, be provided with test cavity 46 in it, be provided with thermopair 5 in the test cavity 46, the signal output part of thermopair 5 connects the signal input part of temperature controller 47, and the signal output part of temperature controller 47 connects the temperature collection end of Data Acquisition and Conversion System (DACS) 52.
Described cooling insulation system 57 comprises ventilation distance collar 2, bosh 3, stressed ring thermal insulation board 16, blower fan 48, cushion block 49 and run-down pipe 50, stressed ring thermal insulation board 16 is positioned at medium-tight system 53 tops, stressed ring thermal insulation board 16 tops are provided with bosh 3, be provided with cushion block 49 in the bosh 3, bosh 3 walls are provided with run-down pipe 50; Ventilation distance collar 2 is provided with through hole, the other blower fan 48 that is provided with of the through hole of ventilation distance collar 2.
Described Data Acquisition and Conversion System (DACS) 52 comprises amplifier, A/D converter, interfacing equipment and storer, and the acquisition controlling signal end of Data Acquisition and Conversion System (DACS) 52 is connected with the acquisition controlling signal end of computing machine 58.
The invention has the beneficial effects as follows:
The present invention has successfully designed the pad loading and load measuring system, medium are given fixed system, medium-tight system, slip measuring system, heating and temperature control system, cooling insulation system, data acquisition system (DAS), has realized the measurement and the control of the multispecimen of pad test.It has following advantage:
(1) multi-functional.This device can carry out life assessment to the gasket seal that is judgment criteria with multiple inefficacy indexs such as slip, creep relaxation rate, compression rebound rates under the different operating modes (temperature, load, pressure medium), can satisfy the needs of engineering test and theoretical research simultaneously.
(2) multispecimen is measured.When being index with the slip, this device can be simultaneously carries out service life evaluation testing under normal temperature or the high temperature to 6 pads; When being index with compression rebound rate or creep relaxation rate, the service life evaluation testing that this device can carry out 12 pads simultaneously.
(3) high parameter.Test temperature can reach 600 ℃, and test pressure can reach 15MPa.
(4) approaching with engineering.Adopt the mode that is connected equivalence with bolt flange in the engineering that test specimen is installed, process of the test and result are near engineering reality.
(5) based on the life assessment that leaks.With the target (allowable) leak rate is to pass judgment on the life-span that criterion is estimated gasket seal, and convenient test is estimated effectively, meets engine request.
(6) test saves time, predicts accurately.Adopt the mode of quickening simultaneously multispecimen to be carried out durability test, shortened test period greatly, less than 10% of common test life time.Adopt the life prediction of probabilistic statistical method realization to test specimen, realistic, accurately and reliably, the error that can avoid a small amount of specimen test to cause.
(7) testing machine compact overall structure, floor area is little.Part simple in structure, easy to process, cheap.Selected sensor and data acquistion and control system precision height, quality is good, can adapt to the long requirement of gasket seal test period.
Description of drawings
Fig. 1 is a general assembly structural representation of the present invention.
Fig. 2 is that pad of the present invention loads and the load measuring system structural representation.
Fig. 3 is the given system architecture synoptic diagram of medium of the present invention.
Fig. 4 is a medium-tight system architecture synoptic diagram of the present invention.
Fig. 5 is the rate measuring system structural representation that leaks hunting of the present invention.
Fig. 6 is temperature control of the present invention and measuring system structural representation.
Fig. 7 is a cooling insulation system structural representation of the present invention.
Among the figure: 1 for loading nut, 2 are the ventilation distance collar, 3 is bosh, 4 are packing seal, 5 is thermopair, 6 is the medium escape pipe, 7 is base, 8 is clamp nut, 9, be the base thermal insulation board, 10 is the medium draft tube, 11 is seal section, 12 is electric furnace, 13 is abutment sleeve, 14 is stressed bolt, 15 is stressed ring, 16 is stressed ring thermal insulation board, 17 is tension-compression sensor, 18 is thrust ball bearing, 19 is boosting-rod, 20 is the high pressure gas holder pressure transducer, 21 is valuator, 22 is the buffer tank pressure transducer, 23 is the buffer tank valve, 24 is the annular seal space valve, 25 is the air-supply valve door, 26 is annular seal space, 27 is buffer tank, 28 is high pressure gas holder, 29 is gland bolt, 30 is gland, 31 is filler, 32 is stuffing-box, 33 for connecting pad, 34 is upper flange, 35 is test pad, 36 is lower flange, 37 is the external pressure pad, 38 are the chamber of leaking hunting, 39 is interior pressure pad sheet, 40 is inner pressure ring, 41 is dormant bolt, 42 are the sealing skin, 43 is outer press ring, 44 is temperature sensor, 45 is micro-pressure sensor, 46 is test cavity, 47 is temperature controller, 48 is blower fan, 49 is cushion block, 50 is run-down pipe, 51 give fixed system for medium, 52 is Data Acquisition and Conversion System (DACS), 53 is the medium-tight system, 54 are temperature control and measuring system, 55 is the slip measuring system, 56 are pad loading and load measuring system, 57 are the cooling insulation system, 58 is computing machine.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
A kind of multi-functional multi-specimen sealing gasket service life evaluation testing apparatus, comprise that pad loads and load measuring system 56 is given fixed system 51 with medium, described medium is connected for the gas end of giving of fixed system 51 with the inlet end of medium-tight system 53, medium-tight system 53 is positioned at the inside of temperature control and measuring system 54, cooling insulation system 57 places medium-tight system 53 tops, and slip measuring system 55 is positioned at a side of temperature control and measuring system 54; Medium-tight system 53, temperature control all load by pad with cooling insulation system 57 with measuring system 54 and are connected with the stressed bolt 14 of load measuring system 56; Data Acquisition and Conversion System (DACS) 52 respectively and medium give fixed system 51, medium-tight system 53, temperature control with measuring system 54, slip measuring system 55 with cool off between the insulation system 57 and be electrically connected.The measuring junction of slip measuring system 55 is positioned at the medium outlet side of medium-tight system 53, and the sensor signal output terminal of slip measuring system 55 connects the collecting sensor signal end of Data Acquisition and Conversion System (DACS) 52.
Pad loads with load measuring system 56 and comprises loading nut 1, base 7, clamp nut 8, stressed bolt 14, stressed ring 15, tension-compression sensor 17 and boosting-rod 19, stressed bolt 14 connects clamp nut 8, base 7, stressed ring 15, tension-compression sensor 17 successively from bottom to top and loads nut 1, the signal output part of tension-compression sensor 17 connects the gasket load collection terminal of Data Acquisition and Conversion System (DACS) 52, load nut 1 and be provided with some holes, be provided with boosting-rod 19 in one or more holes.
Tension-compression sensor 17 can be selected LFSX-20 type tension-compression sensor for use, and it is 300kN that maximum load can be provided, and the Load Control precision is 0.2%, can satisfy the requirement of accurately measuring the non-metallic gasket compressive stres.Load nut 1 and base 7 and be connected in series by bolt, seal places therebetween, and its load mode is similar to the actual loaded mode of engineering Intermediate gasket work, can truly reflect gasket load variation course.Stressed bolt 14 materials are No. 25 Chrominm-molybdenum-vanadium steels, can guarantee to have under the hot conditions enough intensity; Load between nut 1 and the stressed parts and adopt thrust ball bearing 18 to be connected, the sliding-frictional resistance when having reduced the nut loading has greatly improved the loading effect.Be provided with packing seal 4 between stressed ring 15 and the medium-tight system 53, base 7 is provided with floor spacer seat 9.
Stressed bolt 14 main diameters are 30mm, and total length is 872mm, have enough intensity and non-deformability; Stressed bolt 14 upper ends are long 91mm with loading nut 1 mating part, and the fine thread of diameter 31mm is convenient to test accurate loading; It is 60mm, high for the ladder of 50mm makes it a little more than thermal insulation board 9 that the partial design that stressed bolt 14 lower ends link to each other with thermal insulation board 9 becomes diameter, can stress deformation with the assurance thermal insulation board; Stressed bolt 14 lower ends are long for 60mm partly is diameter 39mm, wide 32 Long Circle coarse thread, and the position that base 7 is mated also is designed to supporting Long Circle, the transfer of stressed bolt 14 in the time of can preventing to load.Loading nut 1 outside diameter 140mm of the present invention, the center is the closely-pitched screw of diameter 31mm, the loading hole of 4 dark 45mm of diameter 20mm is distributed in cylindrical.
Medium comprises high pressure gas holder pressure transducer 20 for fixed system 51, valuator 21, buffer tank pressure transducer 22, buffer tank valve 23, annular seal space valve 24, air-supply valve door 25, buffer tank 27 and high pressure gas holder 28, the gas outlet of high pressure gas holder 28 is communicated with an end that connects high pressure gas holder pressure transducer 20 and valuator 21 respectively, the other end of valuator 21 is communicated with respectively and connects buffer tank pressure transducer 22, the air intake opening of buffer tank 27 and buffer tank valve 23, the other end of buffer tank valve 23 is communicated with and connects annular seal space valve 24 and air-supply valve door 25, and what air-supply valve door 25 connected that media give fixed system 51 gives the gas end; The other end of annular seal space valve 24 is communicated with and connects annular seal space 26, and high pressure gas holder pressure transducer 20 and the signal output part of buffer tank pressure transducer 22 are connected the high pressure gas holder pressure acquisition end and the buffer tank pressure acquisition end of Data Acquisition and Conversion System (DACS) 52 respectively.
Test(ing) medium adopts industrial purity nitrogen or air, tests convenient and safe.Medium enters buffer tank through valuator, enters annular seal space by pressure maintaining valve again, and the warranty test pressure medium is stable.Test(ing) medium pressure is measured by high pressure gas holder pressure transducer 20 and buffer tank pressure transducer 22, and test pressure is 0～16MPa, the pressure medium condition in can model engineering.
Medium-tight system 53 comprises several sealed section 11, abutment sleeve 13, gland bolt 29, gland 30, filler 31, stuffing-box 32, be connected with gland 30, filler 31, stuffing-box 32 and six seal sections 11 on the abutment sleeve 13 from top to bottom in turn, gland 30 is provided with gland bolt 29, and gland bolt 29 is threaded with stuffing-box 32.
Adopt the bigger simulation flange of rigidity, eliminate the influence of flange distortion gasket performance.Upper flange 34, a lower flange 36 and a test pad 35 constitute a test group, estimate pad during the life-span with permanent accelerated life test, require that test specimen quantity can not be less than 5 under every group of stress level, general desirable 5～12, consider other condition restriction, seal chamber of the present invention is made up of six seal sections 11, adopts between each section sealing to connect gasket seal; Abutment sleeve 13 lower ends and upper flange 34 and lower flange 36 adopt gasket seal, and packing seal 4 is adopted in the upper end.
Sealing skin 42 is a stainless steel sheet|, and sealing skin 42 holds " Ω " shape ring-type." the composition one airtight annular cavity that leaks hunting between 36 of sealing skin 42 and pad cylindrical and upper flange 34, lower flanges.Slip measuring system 55 also comprises original volume V
CWith volume-variation COEFFICIENT K calibration system.Test(ing) medium is by the pad chamber 38 of leaking hunting of bleeding, cause the change of gaseous state in the chamber 38 of leaking hunting, adopt micro-pressure sensor 45 and temperature sensor 45 to measure the subtle change of gaseous state (pressure, temperature), calculate by The Ideal-Gas Equation and can obtain slip.The slip Measurement Resolution is 10
-5Cm
3, the slip measurement range is 10
-5～1cm
3/ s.
" Ω " shape sealing skin 42 both can guarantee the to leak hunting sealing in chamber 38 can compensate the displacement between upper flange 34 and the lower flange 36 again.Medium leaks from annular seal space 26 and enters the chamber 38 of leaking hunting, and enters measuring system or emptying by air-supply valve door 25.
The purpose that slip is measured is to obtain the out-of-service time of each seal section 11, the i.e. life-span of seal section 11.Apparatus of the present invention can the index leakage be that the evaluation index in pad life-span, each seal section 11 reach this index amount time institute elapsed time and be its corresponding life-span.
Temperature control comprises thermopair 5, electric furnace 12, test cavity 46, temperature controller 47 with measuring system 54, electric furnace 12 is an opposite opened, be provided with test cavity 46 in it, be provided with thermopair 5 in the test cavity 46, the signal output part of thermopair 5 connects the signal input part of temperature controller 47, and the signal output part of temperature controller 47 connects the temperature collection end of Data Acquisition and Conversion System (DACS) 52.
Base thermal insulation board 9 is the lime carbonate sheet asbestos with stressed ring thermal insulation board 16, has heat-proof quality preferably, can bear certain load simultaneously.The heat transfer of stressed ring thermal insulation board 16 blocking-up high-temperature components can reduce the thermal loss in the test cavity.Provision for thermal insulation by water-cooled, heat-exchange method such as air-cooled and stressed ring thermal insulation board 16 can guarantee that the working temperature of each sensor is lower than 70 ℃ of its ultimate temperatures that can bear.
Data Acquisition and Conversion System (DACS) 52 comprises amplifier, A/D converter, interfacing equipment and storer, and the acquisition controlling signal end of Data Acquisition and Conversion System (DACS) 52 is connected with the acquisition controlling signal end of computing machine 58.
Data Acquisition and Conversion System (DACS) 52 is a core with the microcomputer, each sensor converts various measured parameter (minute-pressure and temperature variation in gasket load, pad displacement, test(ing) medium pressure, environment temperature, the chamber 38 of leaking hunting) to analog voltage signal, amplify or decay by amplifier, and convert digital quantity to through A/D converter, link to each other with computing machine by input interface.In the process of the test, data acquisition system (DAS) is gone the rounds to detect, gathers, is stored measured parameter according to the different tests content.Test findings can provide by peripherals (printer, plotting apparatus) with the form of data, form, curve or fitting formula.
Principle of work of the present invention is:
In conjunction with Fig. 2, test pad is by temperature control and measuring system 54 warranty test temperature, behind pad loading and load measuring system 56 pretensions, test(ing) medium enters medium-tight system 53 for fixed system 51 from medium, the part medium leaks from medium-tight system 53 and enters slip measuring system 55, Data Acquisition and Conversion System (DACS) 52 is gathered institute's temperature, pressure and pressure difference signal, and feeds back.Cooling insulation system 5 can reduce the working temperature of each sensor of heat loss the reduction simultaneously in the test cavity, guarantees the operation that it is safe and reliable.
The method of operation of the present invention is:
When using this contrive equipment that pad is carried out durability test, at first with locating sleeve jacket casing 13 on the stressed bolt 14 that is fixed in base 7, the string intersection goes into to connect test pad 35 and six seal sections 11 successively then, six seal section 11 upper ends are adopted respectively and are connected pad and the radial and axial sealing of packing seal 4 realizations, settle inner pressure ring 40 again, outer press ring 43, base thermal insulation board 9, stressed ring thermal insulation board 16, bosh 3, cushion block 49, tension-compression sensor 17, ventilation distance collar 2, thrust ball bearing 18 and the test pad that loads in 1, six seal section of nut 11 are the random sampling gained.Tighten and load 1 pair of test pad 35 imposed load of nut, electric furnace 12 is installed closure, set test temperature, carry out heat tracing.Heat after 16 hours, tighten stressed bolt 14 again to prefastening load.After this, each stress level is different at set intervals, and high level is can the time short, and low-level suitable length feeds the medium of certain pressure a bit and measures each section slip, writes down each section sealing and touches the mark time of slip, the i.e. life-span of each seal section 11.After battery of tests is finished device is cooled to normal temperature, the dismounting back reloads test pad 35 in seal section 11, repeat above-mentioned steps again and test.
Claims (8)
1. multi-functional multi-specimen sealing gasket service life evaluation testing apparatus, comprise that pad loads and load measuring system (56) is given fixed system (51) with medium, it is characterized in that described medium is connected with the inlet end of medium-tight system (53) to the gas end of giving of fixed system (51), medium-tight system (53) is positioned at the inside of temperature control and measuring system (54), cooling insulation system (57) places medium-tight system (53) top, and slip measuring system (55) is positioned at a side of temperature control and measuring system (54); Medium-tight system (53), temperature control all load by pad with cooling insulation system (57) with measuring system (54) and are connected with the stressed bolt (14) of load measuring system (56); Data Acquisition and Conversion System (DACS) (52) respectively and medium give fixed system (51), medium-tight system (53), temperature control with measuring system (54), slip measuring system (55) with cool off between the insulation system (57) and be electrically connected; Described medium-tight system (53) comprises several sealed section (11), abutment sleeve (13), gland bolt (29), gland (30), filler (31), stuffing-box (32), be connected with gland (30), filler (31), stuffing-box (32) and several sealed section (11) on the abutment sleeve (13) from top to bottom in turn, gland (30) is provided with gland bolt (29), and gland bolt (29) is threaded with stuffing-box (32); Described seal section (11) comprises annular seal space (26), connects pad (33), upper flange (34), test pad (35); Several sealed section (11) is connected in series successively, wherein the lower flange (36) of at least one seal section (11) is provided with medium draft tube (10), the air intake opening of medium draft tube (10) is the inlet end of medium-tight system (53), the lower flange (36) of at least one seal section (11) is provided with medium escape pipe (6), and the gas outlet of medium escape pipe (6) is the outlet side of medium-tight system (53); Abutment sleeve (13) bottom is provided with the annular projection, and the annular projection is connected with at least one lower flange (36); Upper flange (34) is provided with boss, and lower flange (36) is provided with concave station, and the concave station of one or more lower flanges (36) is provided with medium escape pipe connector.
2. multi-functional multi-specimen sealing gasket service life evaluation testing apparatus according to claim 1, it is characterized in that described pad loads and load measuring system (56) comprises loading nut (1), base (7), clamp nut (8), stressed bolt (14), stressed ring (15), tension-compression sensor (17) and boosting-rod (19), stressed bolt (14) connects clamp nut (8) successively from bottom to top, base (7), stressed ring (15), tension-compression sensor (17) and loading nut (1), the signal output part of tension-compression sensor (17) connects the gasket load collection terminal of Data Acquisition and Conversion System (DACS) (52), load nut (1) and be provided with some holes, be provided with boosting-rod (19) in one or more holes.
3. multi-functional multi-specimen sealing gasket service life evaluation testing apparatus according to claim 2 is characterized in that being provided with thrust ball bearing (18) between described loading nut (1) and the tension-compression sensor (17); Be provided with packing seal (4) between stressed ring (15) and the medium-tight system (53), base (7) is provided with floor spacer seat (9).
4. multi-functional multi-specimen sealing gasket service life evaluation testing apparatus according to claim 1, it is characterized in that described medium comprises high pressure gas holder pressure transducer (20) to fixed system (51), valuator (21), buffer tank pressure transducer (22), buffer tank valve (23), annular seal space valve (24), air-supply valve door (25), buffer tank (27) and high pressure gas holder (28), the gas outlet of high pressure gas holder (28) is communicated with an end that connects high pressure gas holder pressure transducer (20) and valuator (21) respectively, the other end of valuator (21) is communicated with respectively and connects buffer tank pressure transducer (22), the air intake opening of buffer tank (27) and buffer tank valve (23), the other end of buffer tank valve (23) is communicated with and connects annular seal space valve (24) and air-supply valve door (25), and what air-supply valve door (25) connected that medium gives fixed system (51) gives the gas end; The other end of annular seal space valve (24) is communicated with and connects annular seal space (26), and high pressure gas holder pressure transducer (20) and the signal output part of buffer tank pressure transducer (22) are connected the high pressure gas holder pressure acquisition end and the buffer tank pressure acquisition end of Data Acquisition and Conversion System (DACS) (52) respectively.
5. multi-functional multi-specimen sealing gasket service life evaluation testing apparatus according to claim 1, it is characterized in that described slip measuring system (55) comprises external pressure pad (37), the chamber of leaking hunting (38), interior pressure pad sheet (39), inner pressure ring (40), dormant bolt (41), sealing skin (42), outer press ring (43), temperature sensor (44) and micro-pressure sensor (45), external pressure pad (37) is provided with sealing skin (42) with interior pressure pad sheet (39), and the cavity between external pressure pad (37), interior pressure pad sheet (39) and the sealing skin (42) constitutes the chamber (38) of leaking hunting; The outlet side of medium-tight system (53) is provided with temperature sensor (44) and micro-pressure sensor (45), the temperature signal output terminal of temperature sensor (44) and micro-pressure sensor (45) and micro-pressure signal output terminal be connected respectively Data Acquisition and Conversion System (DACS) (52) leak hunting the cavity temperature collection terminal with leak hunting chamber minute-pressure collection terminal.
6. multi-functional multi-specimen sealing gasket service life evaluation testing apparatus according to claim 1, it is characterized in that described temperature control comprises thermopair (5), electric furnace (12), test cavity (46), temperature controller (47) with measuring system (54), electric furnace (12) is an opposite opened, be provided with test cavity (46) in it, be provided with thermopair (5) in the test cavity (46), the signal output part of thermopair (5) connects the signal input part of temperature controller (47), and the signal output part of temperature controller (47) connects the temperature collection end of Data Acquisition and Conversion System (DACS) (52).
7. multi-functional multi-specimen sealing gasket service life evaluation testing apparatus according to claim 1, it is characterized in that described cooling insulation system (57) comprises ventilation distance collar (2), bosh (3), stressed ring thermal insulation board (16), blower fan (48), cushion block (49) and run-down pipe (50), stressed ring thermal insulation board (16) is positioned at medium-tight system (53) top, stressed ring thermal insulation board (16) top is provided with bosh (3), be provided with cushion block (49) in the bosh (3), bosh (3) wall is provided with run-down pipe (50); Ventilation distance collar (2) is provided with through hole, the other blower fan (48) that is provided with of the through hole of ventilation distance collar (2).
8. multi-functional multi-specimen sealing gasket service life evaluation testing apparatus according to claim 1, it is characterized in that described Data Acquisition and Conversion System (DACS) (52) comprises amplifier, A/D converter, interfacing equipment and storer, the acquisition controlling signal end of Data Acquisition and Conversion System (DACS) (52) is connected with the acquisition controlling signal end of computing machine (58).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008102441431A CN101446510B (en) | 2008-12-23 | 2008-12-23 | Multi-functional multi-specimen sealing gasket service life evaluation testing apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008102441431A CN101446510B (en) | 2008-12-23 | 2008-12-23 | Multi-functional multi-specimen sealing gasket service life evaluation testing apparatus |
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| Publication Number | Publication Date |
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| CN101446510A CN101446510A (en) | 2009-06-03 |
| CN101446510B true CN101446510B (en) | 2010-09-15 |
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| CN2008102441431A Expired - Fee Related CN101446510B (en) | 2008-12-23 | 2008-12-23 | Multi-functional multi-specimen sealing gasket service life evaluation testing apparatus |
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