CN104048821B - A kind of pressure-reducing valve life test apparatus - Google Patents
A kind of pressure-reducing valve life test apparatus Download PDFInfo
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- CN104048821B CN104048821B CN201410302332.5A CN201410302332A CN104048821B CN 104048821 B CN104048821 B CN 104048821B CN 201410302332 A CN201410302332 A CN 201410302332A CN 104048821 B CN104048821 B CN 104048821B
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Abstract
The invention discloses a kind of pressure-reducing valve life test apparatus. The relative compressed oil cylinder in this device design left and right, by compressing cylinder advance and retreat reciprocal driven plunger and flange, the left and right end face of flange sealing of tested pressure-reducing valve, designs and moves axially the oil cylinder hold-down mechanism that reciprocally moves around and meet the requirement of different structure length; Because continuous operating life test is a long fatigue test process, this oil cylinder hydraulic hold-down mechanism design makes chucking power continuous action, reliable firmly safety; By arrange accumulator and bidirectional hydraulic water pump cooperatively interact regulate supply water; In process of the test, the circulation of pipeline water flow is carried out life test to pressure-reducing valve, accumulator is due to lasting pressure of supply water meeting slow decreasing, in the time that accumulator does not reach the high pressure values of test requirements document, bidirectional hydraulic water pump, to accumulator charging, makes pressure supercharging return to rated pressure value and ensures that high service is stable; In the time that accumulator hydraulic pressure reaches setting value, bidirectional hydraulic water pump stops water filling action.
Description
Technical field
The invention belongs to pressure-reducing valve field tests, especially relate to a kind of pressure-reducing valve life test apparatus.
Background technology
The quality of valve products more and more causes people's attention, and the quality assurance of valve is not only the once inspection of dispatching from the factory, and more needing is the continuation of long-time safe handling. Particularly more conventional pressure-reducing valve in pipe-line system, plays the effect that reduces outlet pressure; It is as the self-contained pressure regulator at a high-low pressure critical point, its performance requirement is strict, substantially be to pack into after pipeline just always in continuous action operation conditions, the pressure of realizing the medium pipelines such as water, steam, oil product regulates, brought into play very important effect for stable, conveying and control system, be one of indispensable important device in energy transfer pipeline.
Therefore, design the device that can test pressure-reducing valve performance and service life to specification and improve valve industry standard, improve valve product quality, ensure that the safe handling of valve has very important significance. Pressure-reducing valve of a great variety, its flange is arranged on the both sides that valve body is relative, and valve body is not of uniform size, and how in mating connection with pressure-reducing valve experimental rig is is fixedly crucial; On the other hand, different pressure-reducing valves has different nominal pressures, supplies water stable while how ensureing to test different vacuum valve, and it is crucial realizing lasting life test.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of pressure-reducing valve life test apparatus that different size structure pressure-reducing valves are connected and fixed that adapts to is provided.
The present invention is by the following technical solutions: a kind of pressure-reducing valve life test apparatus, it is characterized in that: comprise hold-down mechanism and water injecting mechanism, described hold-down mechanism comprises left compressed oil cylinder, right compressed oil cylinder and Shift cylinder, in left compressed oil cylinder, left piston is set, the external part of described left piston connects left supported flange, on described left supported flange, be provided with water inlet, right piston is set in right compressed oil cylinder, the external part of described right piston connects right supported flange, on described right supported flange, be provided with delivery port, between described left compressed oil cylinder and right compressed oil cylinder, pressure-reducing valve to be detected is set, described left compressed oil cylinder and right compressed oil cylinder synchronous working are controlled left supported flange and right supported flange compression or are unclamped the turnover flange port of pressure-reducing valve, mobile piston on described Shift cylinder connects left compressed oil cylinder, and described right compressed oil cylinder is fixedly installed, left compressed oil cylinder by Shift cylinder axially movable near or away from pressure-reducing valve, described water injecting mechanism comprises bidirectional hydraulic water pump, accumulator, water injecting pump, water tank, the first check-valves and the second check-valves, described water tank outwards connects inlet pipeline and outlet pipeline, described bidirectional hydraulic water pump, accumulator, water injecting pump, the first check-valves and the second check-valves are positioned on inlet pipeline, described accumulator, the second check-valves and water injecting pump are connected successively, described bidirectional hydraulic water pump and the series connection of the first check-valves, and and accumulator, the second check-valves, water injecting pump parallel connection, the far-end of described inlet pipeline and outlet pipeline is connected respectively water inlet and delivery port, described water injecting pump is to accumulator and pressure-reducing valve water filling, in the time that accumulator continues pressure of supply water decline, bidirectional hydraulic pump working is to accumulator charging, in the time that energy storage pressure recovers, bidirectional hydraulic water pump quits work.
Improve as one, on pipeline between the second check-valves and water injecting pump, pick out a pressure regulation pipeline, the other end of described pressure regulation pipeline connects outlet pipeline, on pressure regulation pipeline, is provided with pressure regulator valve, and the pressure of inlet pipeline adjusting inlet pipeline guided outlet pipeline into by described pressure regulator valve.
Improve as one, the output of accumulator is provided with import magnetic valve, on described outlet pipeline, be provided with outlet magnetic valve, in the time that the outlet pressure after pressure-reducing valve reaches rated range, outlet magnetic valve is opened the closed electromagnetic valve of import simultaneously, in the time that the outlet pressure after pressure-reducing valve is less than rated range, outlet closed electromagnetic valve import simultaneously magnetic valve is opened.
Improve as one, the input of the second check-valves is provided with water injecting pump water pressure gauge, and the output of described accumulator is provided with the front water pressure gauge of valve.
Improve as one, accumulator is gas-vapor mix accumulator.
Improve as one, left compressed oil cylinder, right compressed oil cylinder, Shift cylinder are connected with respectively a solenoid directional control valve, three solenoid directional control valves are provided with the output oil pipe of two group, article described two, the output oil pipe of a group connects respectively the left and right sides of piston, three solenoid directional control valves switch respectively separately the input channel of oil in the output oil pipe of two group, control the propelling of left piston, right piston, mobile piston or push back.
Improve as one, left compressed oil cylinder, right compressed oil cylinder and the separately output oil pipe between solenoid directional control valve have propelling oil pipe, on described propelling oil pipe, compression oil pressure gauge are set.
Improve as one, also include fuel tank and oil pump, described fuel tank is connected with oil feed line and return line, and described oil pump is arranged on oil feed line, and described oil feed line is connected respectively three solenoid directional control valves with return line.
Beneficial effect of the present invention: pressure-reducing valve flange size and structure length are different, the relative compressed oil cylinder in design left and right, by hydraulic jack advance and retreat reciprocal driven plunger and flange, the sealing of the left and right end face of flange of tested pressure-reducing valve, design moves axially the oil cylinder hold-down mechanism that reciprocally moves around and meets the requirement of different structure length; Because continuous operating life test is a long fatigue test process, this oil cylinder hydraulic hold-down mechanism design makes chucking power continuous action, reliable firmly safety; By arrange accumulator and bidirectional hydraulic water pump cooperatively interact regulate supply water; In process of the test, the circulation of pipeline water flow is carried out life test to pressure-reducing valve, accumulator is due to lasting pressure of supply water meeting slow decreasing, in the time that accumulator does not reach the high pressure values of test requirements document, bidirectional hydraulic water pump, to accumulator charging, makes pressure supercharging return to rated pressure value and ensures that high service is stable; In the time that accumulator hydraulic pressure reaches setting value, bidirectional hydraulic water pump stops water filling action; Thereby realize steady pressure supply water, ensure life test continue carry out.
Brief description of the drawings
Fig. 1 is the structural representation of pressure-reducing valve life test apparatus of the present invention.
Fig. 2 is the partial structurtes schematic diagram at hold-down mechanism of the present invention and pressure-reducing valve place.
Detailed description of the invention
Below in conjunction with accompanying drawing, specific embodiments of the invention are elaborated.
As shown in Figure 1, 2, be a kind of specific embodiment of pressure-reducing valve life test apparatus of the present invention. this embodiment comprises hold-down mechanism 1 and water injecting mechanism 2, hold-down mechanism 1 comprises left compressed oil cylinder 11, right compressed oil cylinder 12 and Shift cylinder 13, in left compressed oil cylinder 11, left piston 11a is set, the external part of left piston 11a connects left supported flange 11b, on left supported flange 11b, be provided with water inlet 3, right piston 12a is set in right compressed oil cylinder 12, the external part of right piston 12a connects right supported flange 12b, on right supported flange 12b, be provided with delivery port 4, between left compressed oil cylinder 11 and right compressed oil cylinder 12, pressure-reducing valve to be detected 5 is set, left compressed oil cylinder 11 and right compressed oil cylinder 12 synchronous workings are controlled left supported flange 11b and right supported flange 12b compression or are unclamped the turnover flange port of pressure-reducing valve 5, mobile piston 13a on Shift cylinder 13 connects left compressed oil cylinder 11, and right compressed oil cylinder 12 is fixedly installed, left compressed oil cylinder 11 by Shift cylinder 13 axially movable near or away from pressure-reducing valve 5, water injecting mechanism 2 comprises bidirectional hydraulic water pump 21, accumulator 22, water injecting pump 23, water tank 24, the first check-valves 25 and the second check-valves 26, water tank 24 outwards connects inlet pipeline 241 and outlet pipeline 242, bidirectional hydraulic water pump 21, accumulator 22, water injecting pump 23, the first check-valves 25 and the second check-valves 26 are positioned on inlet pipeline 241, accumulator 22, the second check-valves 26 and water injecting pump 23 are connected successively, bidirectional hydraulic water pump 21 and the first check-valves 25 are connected, and with accumulator 22, the second check-valves 26, water injecting pump 23 parallel connections, the far-end of inlet pipeline 241 and outlet pipeline 242 is connected respectively water inlet 3 and delivery port 4, water injecting pump 23 is to accumulator 22 and pressure-reducing valve 5 water fillings, in the time that accumulator 22 continues pressure of supply water decline, bidirectional hydraulic water pump 21 is worked to accumulator 22 superchargings, in the time that accumulator 22 pressure recover, bidirectional hydraulic water pump 21 quits work. in the present invention, left compressed oil cylinder 11 and right compressed oil cylinder 12 are hydraulic jack, by pass into oil in oil cylinder, left piston 11a and right piston 12a are advanced or are retreated, and are compressed or unclamped the flange port of pressure-reducing valve 5 by left supported flange 11b and right supported flange 12b, left piston 11a and right piston 12a are the structure of two-way push, and a side oil-feed is released piston flange and compressed, and opposite side oil-feed pushes back piston flange and unclamps, hold-down mechanism 1 fixes pressure-reducing valve 5, and by water inlet 3, to pressure-reducing valve 5 water fillings, delivery port 4 water outlets, carry out the continuous operation test life-span. for the distance between the left compressed oil cylinder 11 of more flexible control and right compressed oil cylinder 12, be provided with Shift cylinder 13 and adjust moving axially of left compressed oil cylinder 11 entirety, adapt to the installation testing needs of larger pressure-reducing valve 5, Shift cylinder 13a is also hydraulic jack and the structure for two-way push, and the pushing direction of mobile piston 13a is synchronizeed with the pushing direction of left piston 11a. the water circulation of the inlet pipeline 241 that in the present invention, water tank 24 picks out and outlet pipeline 242 implement devices, before carrying out continuous operating life test, elder generation to accumulator 22 and pressure-reducing valve 5 body cavity water fillings, can reduce the live load of test period and bidirectional hydraulic water pump 21 by water injecting pump 23, and ensures to reach standard gauge quota constant-pressure value before valve, in process of the test, when pipeline inner pressure does not reach the high pressure values of test requirements document or accumulator 22 because lasting pressure of supply water can slow decreasing, bidirectional hydraulic water pump 21 is started working to accumulator, and to return to rated pressure value assure feed water stable in 22 superchargings, in the time that the pressure of accumulator 22 reaches setting value, bidirectional hydraulic water pump 21 stops water filling action, arranging of the first check-valves 25 and the second check-valves 26 ensures that in pipeline, water does not reflux, pressure stability.
As the improved detailed description of the invention of one, on pipeline between the second check-valves 26 and water injecting pump 23, pick out a pressure regulation pipeline 243, the other end of pressure regulation pipeline 243 connects outlet pipeline 242, on pressure regulation pipeline 243, be provided with pressure regulator valve 27, the pressure of inlet pipeline 241 guided outlet pipeline 242 inlet pipeline 241 into and regulates by pressure regulator valve 27. Pressure regulator valve 27 is set and water is guided into the inlet pipeline 241 of water injecting pump 23 outputs from outlet pipeline 242, regulate the outlet pressure of water injecting pump 23, adapt to the pressure-reducing valve 5 of low nominal pressure.
As the improved detailed description of the invention of one, the output of accumulator 22 is provided with import magnetic valve 3a, on outlet pipeline 242, be provided with outlet magnetic valve 4a, import magnetic valve 3a and outlet magnetic valve 4a cooperatively interact out and close, in the time that the outlet pressure after pressure-reducing valve 5 reaches rated range, outlet magnetic valve 4a opens the magnetic valve of import simultaneously 3a and closes, in the time that the outlet pressure after pressure-reducing valve 5 is less than rated range, outlet magnetic valve 4a closes the magnetic valve of import simultaneously 3a and opens, thereby dynamic adjustments pipeline makes pressure in rated range.
As the improved detailed description of the invention of one, the input of the second check-valves 26 is provided with water injecting pump water pressure gauge 6, and the output of accumulator 22 is provided with the front water pressure gauge 7 of valve. Water injecting pump water pressure gauge 6 is for monitoring the outlet pressure of water injecting pump 23, and when water injecting pump water pressure gauge 6 arrives setting value, water injecting pump 23, by out of service, facilitate tester to observe and monitors; Before valve, water pressure gauge 7, for monitoring the pressure of accumulator 22, is convenient to the cooperation adjustment of bidirectional hydraulic water pump 21.
As the improved detailed description of the invention of one, accumulator 22 is gas-vapor mix accumulator. Owing to adopting the accumulator of gas-vapor mix, utilize the large feature of the compressible coefficient of expansion of gas, make accumulator 22 inside can accumulate the water yield to a certain degree, reduce the startup frequency of bidirectional hydraulic water pump 21, thereby reduce its live load.
As the improved detailed description of the invention of one, left compressed oil cylinder 11, right compressed oil cylinder 12, Shift cylinder 13 are connected with respectively a solenoid directional control valve 1a, three solenoid directional control valve 1a are provided with the output oil pipe of two group, article two, the output oil pipe of a group connects respectively the left and right sides of piston, three solenoid directional control valve 1a switch respectively separately the input channel of oil in the output oil pipe of two group, control the propelling of left piston 11a, right piston 12a, mobile piston 13a or push back. Three solenoid directional control valve 1a controls that one of the each freedom of oil cylinder matches, make its synchronous working complete the conversion of oil circuit, switch the output oil pipe of two group separately, realize and in the time of a side oil-feed, release piston flange compression, when opposite side oil-feed, push back piston flange and unclamp, the piston synchronous action in each oil cylinder realizes the compression to pressure-reducing valve 5 and unclamps.
As the improved detailed description of the invention of one, left compressed oil cylinder 11, right compressed oil cylinder 12 and the separately output oil pipe between solenoid directional control valve 1a have the oil pipe of propelling 1b, advance on oil pipe 1b and arrange and compress oil pressure gauge 1c.
Left compressed oil cylinder 11 and right compressed oil cylinder 12 are during from the flange of two side compression pressure-reducing valves 5, the size cases of oil pressure is most important to sealing effectiveness, by being set at propelling oil pipe 1b place, compression oil pressure gauge 1c make tester observe intuitively pressure condition, ensure that left compressed oil cylinder 11 and right compressed oil cylinder 12 have enough chucking powers pressure-reducing valve 5 is clamped to sealing, if there is the situation that pressure changes, tester can make adjustment in time.
As the improved detailed description of the invention of one, also include fuel tank 8 and oil pump 9, fuel tank 8 is connected with oil feed line 81 and return line 82, and oil pump 9 is arranged on oil feed line 81, and oil feed line 81 is connected respectively three solenoid directional control valve 1a with return line 82. Fuel tank 8 and oil pump 9 pass through three solenoid directional control valve 1a difference compressed oil cylinder 11, right compressed oil cylinder 12, Shift cylinder 13 fuel feeding left, and realize oily periodic duty by oil feed line 81 and return line 82.
Claims (9)
1. a pressure-reducing valve life test apparatus, is characterized in that: comprise hold-down mechanism (1) and water injecting mechanism (2),Described hold-down mechanism (1) comprises left compressed oil cylinder (11), right compressed oil cylinder (12) and Shift cylinder (13),Left piston (11a) is set in left compressed oil cylinder (11), and the external part of described left piston (11a) connects left pressureTight flange (11b), is provided with water inlet (3), right compressed oil cylinder (12) on described left supported flange (11b)In right piston (12a) is set, the external part of described right piston (12a) connects right supported flange (12b), instituteState on right supported flange (12b) and be provided with delivery port (4), described left compressed oil cylinder (11) and right compression are oilyPressure-reducing valve to be detected (5) is set, described left compressed oil cylinder (11) and right compressed oil cylinder between cylinder (12)(12) synchronous working is controlled left supported flange (11b) and right supported flange (12b) compresses or unclamps decompressionThe turnover flange port of valve (5); Mobile piston (13a) on described Shift cylinder (13) connects left compressionOil cylinder (11), described right compressed oil cylinder (12) is fixedly installed, and left compressed oil cylinder (11) passes through Shift cylinder(13) axially movable near or away from pressure-reducing valve (5); Described water injecting mechanism (2) comprises bidirectional hydraulic water pump(21), accumulator (22), water injecting pump (23), water tank (24), the first check-valves (25) and second are onlyReturn valve (26), described water tank (24) outwards connects inlet pipeline (241) and outlet pipeline (242), instituteState bidirectional hydraulic water pump (21), accumulator (22), water injecting pump (23), the first check-valves (25) and secondIt is upper that check-valves (26) is positioned at inlet pipeline (241), described accumulator (22), the second check-valves (26)With water injecting pump (23) connects successively, described bidirectional hydraulic water pump (21) and the first check-valves (25) series connection,And in parallel with accumulator (22), the second check-valves (26), water injecting pump (23), described inlet pipeline (241)Be connected respectively water inlet (3) and delivery port (4), described water injecting pump (23) with the far-end of outlet pipeline (242)To accumulator (22) and pressure-reducing valve (5) water filling, in the time that accumulator (22) continues pressure of supply water decline, twoWork to accumulator (22) supercharging to hydraulic pump (21); In the time that accumulator (22) pressure recovers, twoQuit work to hydraulic pump (21).
2. a kind of pressure-reducing valve life test apparatus according to claim 1, is characterized in that described the second check-valves(26) on the pipeline and between water injecting pump (23), pick out a pressure regulation pipeline (243), described pressure regulation pipeline(243) the other end connects outlet pipeline (242), is provided with pressure regulator valve (27) on pressure regulation pipeline (243),Described pressure regulator valve (27) is guided outlet pipeline (242) into inlet pipeline (241) and is regulated inlet pipeline (241)Pressure.
3. a kind of pressure-reducing valve life test apparatus according to claim 2, is characterized in that described accumulator (22)Output be provided with import magnetic valve (3a), described outlet pipeline is provided with outlet magnetic valve on (242)(4a),, in the time that the outlet pressure after pressure-reducing valve (5) reaches rated range, outlet magnetic valve (4a) is opened sameTime import magnetic valve (3a) close, in the time that the outlet pressure after pressure-reducing valve (5) is less than rated range, outletMagnetic valve (4a) cuts out import magnetic valve (3a) simultaneously and opens.
4. a kind of pressure-reducing valve life test apparatus according to claim 3, is characterized in that described the second check-valves(26) input is provided with water injecting pump water pressure gauge (6), and the output of described accumulator (22) is provided withWater pressure gauge (7) before valve.
5. a kind of pressure-reducing valve life test apparatus according to claim 4, is characterized in that described accumulator (22)For gas-vapor mix accumulator.
6. according to a kind of pressure-reducing valve life test apparatus described in claim 1 or 2 or 3 or 4 or 5, its featureThat described left compressed oil cylinder (11), right compressed oil cylinder (12), Shift cylinder (13) are connected with respectively oneSolenoid directional control valve (1a), three solenoid directional control valves (1a) are provided with the output oil pipe of two group, described inArticle two, the output oil pipe of a group connects respectively the left and right sides of piston, and three solenoid directional control valves (1a) are cut respectivelyChange separately the input channel of oil in the output oil pipe of two group, control left piston (11a), right piston (12a),The propelling of mobile piston (13a) or push back.
7. a kind of pressure-reducing valve life test apparatus according to claim 6, is characterized in that described left compressed oil cylinder(11), right compressed oil cylinder (12) and separately the output oil pipe between solenoid directional control valve (1a) have advance oilPipe (1b), arranges on described propelling oil pipe (1b) and compresses oil pressure gauge (1c).
8. a kind of pressure-reducing valve life test apparatus according to claim 6, is characterized in that also including fuel tank (8)And oil pump (9), described fuel tank (8) is connected with oil feed line (81) and return line (82), described oilIt is upper that pump (9) is arranged on oil feed line (81), and described oil feed line (81) and return line (82) are respectivelyConnect three solenoid directional control valves (1a).
9. a kind of pressure-reducing valve life test apparatus according to claim 7, is characterized in that also including fuel tank (8)And oil pump (9), described fuel tank (8) is connected with oil feed line (81) and return line (82), described oilIt is upper that pump (9) is arranged on oil feed line (81), and described oil feed line (81) and return line (82) are respectivelyConnect three solenoid directional control valves (1a).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410302332.5A CN104048821B (en) | 2014-06-27 | 2014-06-27 | A kind of pressure-reducing valve life test apparatus |
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| CN201410302332.5A CN104048821B (en) | 2014-06-27 | 2014-06-27 | A kind of pressure-reducing valve life test apparatus |
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| CN104048821A CN104048821A (en) | 2014-09-17 |
| CN104048821B true CN104048821B (en) | 2016-05-11 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111256982A (en) * | 2020-03-10 | 2020-06-09 | 山东省产品质量检验研究院 | Multifunctional fire valve body test device |
| CN112197953A (en) * | 2020-09-30 | 2021-01-08 | 北京润世安能科技开发有限公司 | Pressure reducing valve off-line adjusting device |
| CN115575105B (en) * | 2022-09-23 | 2023-09-01 | 河南省锅炉压力容器安全检测研究院 | Pressure-bearing testing device of pressure valve |
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| JP3533453B2 (en) * | 1996-09-17 | 2004-05-31 | 株式会社荏原製作所 | Balance type pressure reducing valve and water supply device |
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