CN1254092A - Safety attachment detection system of liquefied gas transportation tank car - Google Patents
Safety attachment detection system of liquefied gas transportation tank car Download PDFInfo
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- CN1254092A CN1254092A CN 99121259 CN99121259A CN1254092A CN 1254092 A CN1254092 A CN 1254092A CN 99121259 CN99121259 CN 99121259 CN 99121259 A CN99121259 A CN 99121259A CN 1254092 A CN1254092 A CN 1254092A
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Abstract
The safety attachment detection system of liquefied gas transportion tank wagon is charaterized by that the clamping fixture of large-valve universal test bench is mounted on the pressurizing container, the bottom portion of water tank of small-valve universal test bench possesses a test cavity which is fixed on the giude pillar support plate and is connected with the clamping fixture, and the tested workpiece is mounted on the clamping fixture, and on the platform of support abutment of the slip tube level-meter universal test bench an inclined plate is welded, and on the inclined plate a cylinder and a testing tube are mounted. The high-pressure and low-pressure airtightness tests and water-pressure strength test of safety attachment can be respectively implemented by means of three test benches.
Description
The invention belongs to the detection system of railway or highway liquefied gas transportation tank car safety attachment.
Safety attachment on the liquefied gas transportation tank car is the safety features of pressure vessel, and comprising safety valve, quick action emergency valve, ball valve, angle valve, Slide tube level meter etc., they need regularly to detect, and carry out pressurized seal test and water pressure test for strength.The tank car of different model, its safety attachment specification and size are all inequality, therefore only the china railway tank car because of the difference of vehicle, nearly hundred kinds of safety attachments.The valve that detects safety attachment in the past and be a kind of model just designs a testing table, and to clamp, suppress all be manually-operated, has shortcomings such as testing table is of a great variety, investment is big, efficient is low, backward in technique, poor stability.
The objective of the invention is to develop a kind of detection system of liquefied gas transportation tank car safety attachment, characteristics such as this system should have that the testing table kind is few, versatility good, reduced investment, efficient height, security performance are good, automaticity height.
The present invention is made up of big valve universal test bench, little valve universal test bench, Slide tube level meter universal test bench, baric systerm, hydraulic pressure system, electric control system and Single Chip Microcomputer (SCM) system.Three kinds of universal test benches are to be used for regularly or the stryctyrak test of low pressure impermeability, high pressure impermeability and the valve of casual inspection safety attachment, and the former two tests detection by compressed air system, and the latter finishes by the hydraulic testing.Big valve universal test bench (see figure 2) is made up of cylinder 1, guide pillar 2, bifurcation frame 3, slip blade 4, guide pin bushing 5, movable paw 6,3 position-5 way operation valve 7, draining (gas) valve 8, pressure container 9, electrically controlled manipulation platform 10, tank 11, mold 12, water drain valve 13, stop valve 14, bearing 15, top board 16, bearing substrate 17.Cylinder 1 is installed on the top board 16, top board is fixed on the guide pillar 2 with nut, the piston rod end of cylinder 1 is connected with bifurcation frame 3, bifurcation frame 3 is fixed on the slip blade 4, slip blade 4 is fixed on the guide pin bushing 5, guide pin bushing 5 is sleeved on the guide pillar 2, and can slide up and down along guide pillar 2, guide pillar 2 is welded on the substrate 17 of bearing 15, bearing 15 is fixed on by its column on the basis on ground, and movable paw 6,3 position-5 way operation valve 7, electrically controlled manipulation platform 10, tank 11 and stop valve 14 are installed on the substrate of bearing 15; Pressure container 9, water drain valve 13 and draining (gas) valve 8 are housed below bearing 15 substrates, mold 12 be contained in pressure container 9 above, measured workpiece is contained in above the mold 12, its ring flange and mold coincide, mold 12 can be changed according to the workpiece size difference.The structural similarity of little valve universal test bench (see figure 3) and big valve universal test bench is made up of otic placode 23, planker 24, presser feet post 25 and presser feet 26, operation valve 27,3 position-5 way operation valve 28, water drain valve 29, stop valve 30, test cavity 31, electrically controlled manipulation platform 32, tank 33, mold 34, bearing 35, bearing backboard 36, guide pillar support plate 37, lower connecting plate 38, upper junction plate 39, clamp nut 40, the bearing platform 41 of cylinder 21, guide pillar 22, cylinder piston.Cylinder 21 is packed on the upper junction plate 39, upper junction plate 39 and lower connecting plate 38 are welded on the bearing backboard 36, two guide pillar 22 lower ends are connected with guide pillar support plate 37 by screw thread, guide pillar 22 tops are thick following thin, the guide pillar upper end is fixed on upper junction plate 39 and the lower connecting plate 38, the piston otic placode 23 of cylinder 21 is connected with supporting plate 24, presser feet post 25 and presser feet 26 are housed below the supporting plate 24, supporting plate 24 and presser feet 26 are enclosed within the bottom (part that diameter is thin) of guide pillar 22, and slide up and down along it, tank 33 is housed on bearing platform 41, electrically controlled manipulation platform 32, operation valve 27,3 position-5 way operation valve 28, at bottom of gullet a test cavity 31 is arranged, it is fixed on the guide pillar support plate 37, is connected with mold 34; A stop valve 30 is arranged below the bearing platform, and bearing platform 41 welds with bearing backboard 36.Slide tube level meter universal test bench (see figure 4) is made up of electrically controlled manipulation platform 42, cylinder 43, Rocker arm 44, tank 45, water drain valve 46, operation valve 47,3 position-5 way operation valve 48, testing tube tail end stop valve 49, bearing 50, rocking arm holder 51, connecting pin 52, bearing pin 53, cylinder piston rod 54, testing tube 55, swash plate 56, end plate 57.Electrically controlled manipulation platform 42, operation valve 47,3 position-5 way operation valve 48 are housed above the platform of bearing 50, be welded with swash plate 56 above the platform of bearing 50, cylinder 43 and testing tube 55 are housed on swash plate 56, testing tube 55 is tiltedly put, end plate 57 is being fixed in the upper end of testing tube 55, rocking arm holder 51 is housed on end plate 57; Rocker arm 44 is connected with rocking arm holder 51 with cylinder piston rod 54 respectively with bearing pin 53 by connecting pin 52; tank 45 is housed; be equipped with water drain valve 46 below the tank on end plate 57, at the testing tube tail end stop valve 49 is housed.Three kinds of shared circuits system (see figure 5)s of test on three testing tables and each testing table, this system is made up of air compressor machine 58, total reservoir 59, two position two- way valve 60,61,62, reduction valve 63,64, high-pressure electric control valve 65, air receiver 66, three position five- way valve 7,28,48, control stand 68, operation valve 14,27,47, high-pressure hydraulic pump 70, stop valve 71, air main 72,73, water main 74, tensimeter 75, pressure transducer 76.The pressurized air that air compressor machine 58 comes out can divide three the tunnel to enter air supply system through total reservoir 59: the first via enters air receiver 66 through two position two-way valve 60, reduction valve 63, come out to enter the cylinder 21 of the cylinder 1 of big valve universal test bench, little valve universal test bench, the cylinder 43 of Slide tube level meter testing table respectively by air receiver 66 again through air main 72, three position five- way valve 7 or 28 or 48, make the cylinder action, respectively the testpieces on big valve, little valve and the Slide tube level meter universal test bench is clamped.The second the tunnel can remove big valve, little valve and Slide tube level meter universal test bench respectively through two position two-way valve 62, reduction valve 64, control stand 68, air main 73, the pressurized air that enters big valve testing table by operation valve 14 (Fig. 2) through air intake opening G, enter pressure container 9, big valve class is carried out the low pressure tightness test; The pressurized air that enters little valve testing table enters test cavity 31 by operation valve 27 (Fig. 3) through stop valve 30, and little valve class is carried out the low pressure tightness test; The pressurized air that enters the Slide tube level meter testing table enters testing tube 55 by operation valve 47 (Fig. 4) through stop valve 49, and various Slide tube level meters are carried out the low pressure tightness test.Third Road through two position two-way valve 61, high-pressure electric control valve 65, air main 73, can enter big valve, little valve and Slide tube level meter universal test bench respectively, carry out the high pressure tightness test, the pathway that enters three testing tables is identical with low pressure tightness test (the second tunnel).Water pressure test for strength is can remove three testing tables by the water under high pressure that water pump 70 is got respectively through water main 7, the water under high pressure that enters big valve universal test bench is through stop valve 77, enter pressure container 9 by the water inlet H (see figure 2) on the big valve testing table, big valve class testpieces is carried out the hydraulic testing; The water under high pressure that enters little valve universal test bench is through stop valve 78, enter stop valve 30 (Fig. 3) by the water inlet I on the little valve testing table, enter test cavity 31 then, little valve class testpieces is carried out the hydraulic testing, the water under high pressure that enters the Slide tube level meter universal test bench is through stop valve 79, water inlet J (see figure 4) by on the little valve testing table enters testing tube 55 through stop valve 49, and various Slide tube level meters are carried out the hydraulic testing.
The present invention can finish the test of size many safety attachments close but inequality on a testing table, be to realize with the different mold of size, and mold can finish a plurality of different types of workpiece tests, and mold has certain versatility.For example: a mold can be installed some safety valve, quick action emergency valve, some ball valves that also can be installed, thus simplified test bench installation greatly.Can finish three kinds of tests simultaneously on a testing table, that is: low pressure tightness test, high pressure tightness test, water pressure test for strength had so both reduced testing equipment, had also simplified the process of being installed, and had saved the non-cutting time of test.Three kinds of pneumatic, hydraulic pressure of the shared cover of test, control loop have advantages such as equipment is few, easy to operate, automaticity is high, work safety, test is rapid, data are reliable.
Fig. 1 is an one-piece construction synoptic diagram of the present invention, Fig. 2 is the structural representation of big valve universal test bench, Fig. 3 is the structural representation of little valve universal test bench, Fig. 4 is the structural representation of Slide tube level meter universal test bench, Fig. 5 is the structural representation of detection system pneumatic circuit, Fig. 6 is the electric-control system block scheme, and Fig. 7 is air pressure, hydraulic testing system block diagram, and Fig. 8 is the single-chip computer control system block scheme.
Embodiment: present embodiment (referring to Fig. 5) is made up of big valve universal test bench 101, little valve universal test bench 102, Slide tube level meter universal test bench 103 and their pneumatic circuit system.Big valve universal test bench (see figure 2) is made up of cylinder 1, guide pillar 2, bifurcation frame 3, slip blade 4, guide pin bushing 5, movable paw 6,3 position-5 way operation valve 7, draining (gas) valve 8, pressure container 9, electrically controlled manipulation platform 10, tank 11, mold 12, water drain valve 13, stop valve 14, bearing 15, top board 16, bearing substrate 17.Cylinder 1 is installed on the top board 16, top board is fixed on the guide pillar 2 with nut, the piston rod end of cylinder 1 is connected with bifurcation frame 3, bifurcation frame 3 is fixed on the slip blade 4, slip blade 4 is fixed on the guide pin bushing 5, guide pin bushing 5 is sleeved on the guide pillar 2, and can slide up and down along guide pillar 2, guide pillar 2 is welded on the substrate 17 of bearing 15, bearing 15 is fixed on by its column on the basis on ground, and movable paw 6,3 position-5 way operation valve 7, electrically controlled manipulation platform 10, tank 11 and stop valve 14 are installed on the substrate of bearing 15; Pressure container 9, water drain valve 13 and draining (gas) valve 8 are housed below bearing 15 substrates, mold 12 be contained in pressure container 9 above, measured workpiece is contained in above the mold 12, its ring flange and mold coincide, mold 12 can be changed according to the workpiece size difference.The structural similarity of little valve universal test bench (see figure 3) and big valve universal test bench is made up of otic placode 23, planker 24, presser feet post 25 and presser feet 26, operation valve 27,3 position-5 way operation valve 28, water drain valve 29, stop valve 30, test cavity 31, electrically controlled manipulation platform 32, tank 33, mold 34, bearing 35, bearing backboard 36, guide pillar support plate 37, lower connecting plate 38, upper junction plate 39, clamp nut 40, the bearing platform 41 of cylinder 21, guide pillar 22, cylinder piston.Cylinder 21 is packed on the upper junction plate 39, upper junction plate 39 and lower connecting plate 38 are welded on the bearing backboard 36, two guide pillar 22 lower ends are connected with guide pillar support plate 37 by screw thread, guide pillar 22 tops are thick following thin, the guide pillar upper end is fixed on upper junction plate 39 and the lower connecting plate 38, the piston otic placode 23 of cylinder 21 is connected with supporting plate 24, presser feet post 25 and presser feet 26 are housed below the supporting plate 24, supporting plate 24 and presser feet 26 are enclosed within the bottom (part that diameter is thin) of guide pillar 22, and slide up and down along it, tank 33 is housed on bearing platform 41, electrically controlled manipulation platform 32, operation valve 27,3 position-5 way operation valve 28, at bottom of gullet a test cavity 31 is arranged, it is fixed on the guide pillar support plate 37, is connected with mold 34; A stop valve 30 is arranged below the bearing platform, and bearing platform 41 welds with bearing backboard 36.Slide tube level meter universal test bench (see figure 4) is made up of electrically controlled manipulation platform 42, cylinder 43, Rocker arm 44, tank 45, water drain valve 46, operation valve 47,3 position-5 way operation valve 48, testing tube tail end stop valve 49, bearing 50, rocking arm holder 51, connecting pin 52, bearing pin 53, cylinder piston rod 54, testing tube 55, swash plate 56, end plate 57.Electrically controlled manipulation platform 42, operation valve 47,3 position-5 way operation valve 48 are housed above the platform of bearing 50, be welded with swash plate 56 above the platform of bearing 50, cylinder 43 and testing tube 55 are housed on swash plate 56, testing tube 55 is tiltedly put, end plate 57 is being fixed in the upper end of testing tube 55, rocking arm holder 51 is housed on end plate 57; Rocker arm 44 is connected with rocking arm holder 51 with cylinder piston rod 54 respectively with bearing pin 53 by connecting pin 52; tank 45 is housed; be equipped with water drain valve 46 below the tank on end plate 57, at the testing tube tail end stop valve 49 is housed.Three kinds of shared circuits system (see figure 5)s of test on three testing tables and each testing table, this system is made up of air compressor machine 58, total reservoir 59, two position two- way valve 60,61,62, reduction valve 63,64, high-pressure electric control valve 65, air receiver 66, three position five- way valve 7,28,48, control stand 68, operation valve 14,27,47, high-pressure hydraulic pump 70, stop valve 71, air main 72,73, water main 74, tensimeter 75, pressure transducer 76.The pressurized air that air compressor machine 58 comes out can divide three the tunnel to enter air supply system through total reservoir 59: the first via enters air receiver 66 through two position two-way valve 60, reduction valve 63, come out to enter the cylinder 21 of the cylinder 1 of big valve universal test bench, little valve universal test bench, the cylinder 43 of Slide tube level meter testing table respectively by air receiver 66 again through air main 72, three position five- way valve 7 or 28 or 48, make the cylinder action, respectively the testpieces on big valve, little valve and the Slide tube level meter universal test bench is clamped.The second the tunnel can remove big valve, little valve and Slide tube level meter universal test bench respectively through two position two-way valve 62, reduction valve 64, control stand 68, air main 73, the pressurized air that enters big valve testing table by operation valve 14 (Fig. 2) through air intake opening G, enter pressure container 9, big valve class is carried out the low pressure tightness test; The pressurized air that enters little valve testing table enters test cavity 31 by operation valve 27 (Fig. 3) through stop valve 30, and little valve class is carried out the low pressure tightness test; The pressurized air that enters the Slide tube level meter testing table enters testing tube 55 by operation valve 47 (Fig. 4) through stop valve 49, and various Slide tube level meters are carried out the low pressure tightness test.Third Road through two position two-way valve 61, high-pressure electric control valve 65, air main 73, can enter big valve, little valve and Slide tube level meter universal test bench respectively, carry out the high pressure tightness test, the path that enters three testing tables is identical with low pressure tightness test (the second tunnel).Water pressure test for strength is can remove three testing tables by the water under high pressure that water pump 70 is got respectively through water main 7, the water under high pressure that enters big valve universal test bench is through stop valve 77, enter pressure container 9 by the water inlet H (see figure 2) on the big valve testing table, big valve class testpieces is carried out the hydraulic testing; The water under high pressure that enters little valve universal test bench is through stop valve 78, enter a section last valve 30 (Fig. 3) by the water inlet I on the little valve testing table, enter test cavity 31 then, little valve class testpieces is carried out the hydraulic testing, the water under high pressure that enters the Slide tube level meter universal test bench is through stop valve 79, water inlet J (see figure 4) by on the little valve testing table enters testing tube 55 through stop valve 49, and various Slide tube level meters are carried out the hydraulic testing.
With big valve universal test bench is example, its course of work is: tested valve is put into pressure container 9, the flange portions and the mold 12 of valve are matched, handle the relevant knob on the electrically controlled manipulation platform 10 then, open baric systerm, hydraulic pressure system, electric-control system, Single Chip Microcomputer (SCM) system, start-up control valve 7 (see figure 5)s, the pressurized air that air compressor machine 58 comes out is through total reservoir 59, two position two-way valve 60, reduction valve 63 enters air receiver 66, come out through air main 72 by air receiver 66 again, three position five-way valve 7 enters the cylinder (see figure 2) of big valve universal test bench 101, cylinder 1 epicoele is squeezed into pressurized air, cylinder 1 action, its piston rod drives bifurcation frame 3 and slip blade 4 presses down, pressure passes on the movable paw 6 through guide pin bushing 5, thereby compresses tested valve.Fetch boiling water stop valve in the pressing system with fills with water in the tank 11, can carry out low pressure tightness test or the high pressure tightness test or the hydraulic testing.Low pressure or high pressure tightness test are by 10 controls of electrically controlled manipulation platform, when carrying out the low pressure tightness test, press the relevant knob on the control stand 10, open test stop valve 14, the low-pressure air (see figure 5) is through two position two-way valve 62, reduction valve 64, air main 73, operation valve 14 removes big valve universal test bench, pressurized air by operation valve 14 through air intake opening G, enter pressure container 9 (Fig. 2), enter simultaneously in the tested valve, valve is carried out the airtight detection of low pressure, if this valve is sewed, with the naked eye can be observed has bubble to discharge in the tank 11, whether otherwise can not see bubble, so it is qualified to detect this valve.When carrying out the high pressure tightness test, press the relevant knob on the electrically controlled manipulation platform 10, open stop valve 14, (see figure 5) pressurized air can enter big valve universal test bench through two position two-way valve 61, high-pressure electric control valve 65, air main 73, and the path that enters big valve testing table is identical with the low pressure tightness test, if this valve is sewed, with the naked eye can be observed has bubble to discharge in the tank 11, otherwise can not see bubble, so whether can detect this valve qualified.Water pressure test for strength is to be handled by central control board, the water under high pressure that (see figure 5) water pump 70 is got removes big valve universal test bench 101 through water main 74, water under high pressure is through stop valve 77, enter in the pressure container 9 by the water inlet H (see figure 2) on the big valve testing table, enter simultaneously in the tested valve, and the pressurize certain hour, if the insufficient strength of valve, valve body crackle occurs or breaks, the water under high pressure ejection, otherwise safe and sound.The low pressure tightness test of little valve universal test bench and Slide tube level meter universal test bench, high pressure tightness test, water pressure test for strength process of the test basic identical with big valve universal test bench.Single Chip Microcomputer (SCM) system is control baric systerm, hydraulic pressure system, electrical system and three maincenters (with reference to figure 8) that testing table is worked automatically, simultaneously automatically the acquisition test data, to experimental data processing, log, make whole test work realize robotization.This system mainly is made up of CPU80c552 single-chip microcomputer, LCD liquid crystal display, storer, MAX332 serial communication, A/D interface, crystal oscillator, power supply monitoring, driving circuit, photoelectricity isolation, keyboard input circuit, clock circuit etc.
Claims (1)
1, safety attachment detection system of liquefied gas transportation tank car, detection system of the present invention is made up of big valve universal test bench, little valve universal test bench, Slide tube level meter universal test bench, baric systerm, hydraulic pressure system, electric control system and Single Chip Microcomputer (SCM) system; It is characterized in that big valve universal test bench is made up of cylinder (1), guide pillar (2), bifurcation frame (3), slip blade (4), guide pin bushing (5), movable paw (6), 3 position-5 way operation valve (7), draining (gas) valve (8), pressure container (9), electrically controlled manipulation platform (10), tank (11), mold (12), water drain valve (13), stop valve (14), bearing (15), top board (16), bearing substrate (17); Cylinder (1) is installed on the top board (16), top board is fixed on the guide pillar (2) with nut, the piston rod end of cylinder (1) is connected with bifurcation frame (3), bifurcation frame (3) is fixed on the slip blade (4), slip blade (4) is fixed on the guide pin bushing (5), guide pin bushing (5) is sleeved on the guide pillar (2), and slide up and down along guide pillar, guide pillar (2) is welded on the substrate (17) of bearing (15), bearing (15) is fixed on by its column on the basis on ground, and movable paw (6) is installed on the substrate of bearing (15), 3 position-5 way operation valve (7), electrically controlled manipulation platform (10), tank (11) and stop valve (14); Pressure container (9), water drain valve (13) and draining (gas) valve (8) are housed below bearing (15) substrate, mold (12) be contained in pressure container (9) above, tested workpiece is contained in above the mold, its ring flange and mold coincide; Little valve universal test bench is by cylinder (21), guide pillar (22), the otic placode of cylinder piston (23), planker (24), presser feet post (25) and presser feet (26), operation valve (27), 3 position-5 way operation valve (28), water drain valve (29), stop valve (30), test cavity (31), electrically controlled manipulation platform (32), tank (33), mold (34), bearing (35), bearing backboard (36), guide pillar support plate (37), lower connecting plate (38), upper junction plate (39), clamp nut (40), bearing platform (41) is formed; Cylinder (21) is packed on the upper junction plate (39), upper junction plate (39) and lower connecting plate (38) are welded on the bearing backboard (36), two guide pillars (22) lower end connects with guide pillar support plate (37) by screw thread, guide pillar (22) top is thick following thin, the guide pillar upper end is fixed on upper junction plate (39) and the lower connecting plate (38), the piston otic placode (23) of cylinder (21) is connected with supporting plate (24), presser feet post (25) and presser feet (26) are housed below the supporting plate (24), supporting plate (24) and presser feet (26) are enclosed within the bottom of guide pillar (22), and slide up and down along it, tank (33) is housed on bearing platform (41), electrically controlled manipulation platform (32), operation valve (27), 3 position-5 way operation valve (28), at bottom of gullet a test cavity (31) is arranged, it is fixed on the guide pillar support plate (37), and connects with mold (34); A stop valve (30) is arranged below the bearing platform, and bearing platform (41) welds with bearing backboard (36); The Slide tube level meter universal test bench is made up of electrically controlled manipulation platform (42), cylinder (43), rocking arm (44), tank (45), water drain valve (46), operation valve (47), 3 position-5 way operation valve (48), testing tube tail end stop valve (49), bearing (50), rocking arm holder (51), connecting pin (52), bearing pin (53), cylinder piston rod (54), testing tube (55), swash plate (56), end plate (57); Electrically controlled manipulation platform (42) is housed above the platform of bearing (50), operation valve (47), 3 position-5 way operation valve (48), be welded with swash plate (56) above the platform of bearing (50), cylinder (43) and testing tube (55) are housed on swash plate (56), testing tube (55) is tiltedly put, end plate (57) is being fixed in the upper end of testing tube (55), rocking arm holder (51) is housed on end plate (57); rocking arm (44) is connected with rocking arm holder (51) with cylinder piston rod (54) respectively with bearing pin (53) by connecting pin (52); tank (45) is housed; be equipped with water drain valve (46) below the tank on end plate (57), at the testing tube tail end stop valve (49) is housed; Three shared circuits systems of testing table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99121259 CN1254092A (en) | 1999-10-23 | 1999-10-23 | Safety attachment detection system of liquefied gas transportation tank car |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99121259 CN1254092A (en) | 1999-10-23 | 1999-10-23 | Safety attachment detection system of liquefied gas transportation tank car |
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| CN1254092A true CN1254092A (en) | 2000-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 99121259 Pending CN1254092A (en) | 1999-10-23 | 1999-10-23 | Safety attachment detection system of liquefied gas transportation tank car |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102012302A (en) * | 2010-11-24 | 2011-04-13 | 山东万事达专用汽车制造有限公司 | Comprehensive air pressure test bed for vehicle-mounted steel tank |
| CN105043674A (en) * | 2015-09-09 | 2015-11-11 | 浙江施克汽车配件有限公司 | Receiver-drier air tightness test method |
| CN109520677A (en) * | 2019-01-23 | 2019-03-26 | 中汽研汽车检验中心(武汉)有限公司 | Valve detecting system and valve detection testing stand |
| CN110057503A (en) * | 2019-04-30 | 2019-07-26 | 美钻石油钻采系统工程（上海）有限公司 | A kind of test method for testing casing head performance |
-
1999
- 1999-10-23 CN CN 99121259 patent/CN1254092A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102012302A (en) * | 2010-11-24 | 2011-04-13 | 山东万事达专用汽车制造有限公司 | Comprehensive air pressure test bed for vehicle-mounted steel tank |
| CN105043674A (en) * | 2015-09-09 | 2015-11-11 | 浙江施克汽车配件有限公司 | Receiver-drier air tightness test method |
| CN109520677A (en) * | 2019-01-23 | 2019-03-26 | 中汽研汽车检验中心(武汉)有限公司 | Valve detecting system and valve detection testing stand |
| CN110057503A (en) * | 2019-04-30 | 2019-07-26 | 美钻石油钻采系统工程（上海）有限公司 | A kind of test method for testing casing head performance |
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