CN205038044U - Testboard of PV valve cracking pressure and leakproofness test - Google Patents
Testboard of PV valve cracking pressure and leakproofness test Download PDFInfo
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- CN205038044U CN205038044U CN201520815468.6U CN201520815468U CN205038044U CN 205038044 U CN205038044 U CN 205038044U CN 201520815468 U CN201520815468 U CN 201520815468U CN 205038044 U CN205038044 U CN 205038044U
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Abstract
The utility model belongs to the technical field of the environmental protection, concretely relates to testboard of PV valve cracking pressure and leakproofness test. The testboard includes drainage unit, pressure test unit and test disk seat, the drainage unit passes through quick -operation joint with the test disk seat and connects, the pressure test unit passes through quick -operation joint with the test disk seat to be connected, wherein the drainage unit includes gas cylinder, flowmeter and buffer tank, the gas cylinder passes through the pipe connection flowmeter, needle valve and bypass valve has concatenated on the pipeline between flowmeter and the buffer tank, the buffer tank pass through quick -operation joint with the test disk seat is connected, the pipeline of being surveyed PV valve and other check out test sets is connected to the test disk seat, the test disk seat passes through quick -operation joint and connects the pressure test unit. The utility model discloses can detection PV valve cracking pressure directly perceived effectual with its leakage condition, manual operation is simply convenient, the check out test set is easily maintained and is consumed energy for a short time.
Description
Technical field
The utility model belongs to environmental technology field, is specifically related to a kind of test board about P/V valve (pressure/vacuum) opening pressure and performing leak test, particularly for the P/V valve that refuelling station's gas outlet of petroleum vapor recovery is installed.
Background technology
In recent years along with the formulation of the appearance of national policy and all standard, index, gas station oil gas reclaims development rapidly, and China's oil gas recovery system of gas station requires that oil tank is strictly airtight, and the maximum tank pressure without oil tank during after-treatment device is controlled by P/V valve, guarantee safety.In fact, the strict leakproofness of tank system is the engineering problem that an exception is difficult, if P/V valve is poorly sealed, along with the pressure differential of tank pressure and ambient atmosphere changes, the oil gas reclaimed in oil-gas space after exceeding certain pressure is slowly emitted because of leakage, reduce petroleum vapor recovery efficiency, pollutant atmosphere.In addition, GB50156-2012 6.3.10 specifies: when refuelling station adopts gas recovery system for oil, the snorkel mouth of pipe of gasoline cistern, except installing except spark arrester, still should establish vacuum pressure valve.The work malleation of vacuum pressure valve is 2kpa ~ 3kpa, and work negative pressure is preferably 1.5kpa ~ 2kpa.Therefore, P/V valve before the mounting, through strict test with guaranteed performance, and regularly need need be opened and inspect the P/V valve in using, clean and safeguard, ensures that it meets opening pressure requirement, sealing property requirement.
Utility model content
The utility model provides the test board of a kind of P/V valve opening pressure and performing leak test, this test board can be used for opening and inspecting in the factory inspection of P/V valve or use procedure, gas outlet with reference to oil tank is equipped with associated assay devices, intuitively effectively can detect P/V valve opening pressure and its leakage situation, manual operation is simple and convenient, checkout equipment easy care and consume energy little.
The technical scheme that the utility model adopts is:
The test board of a kind of P/V valve opening pressure and performing leak test, test board comprises drainage unit, pressure test unit and test valve seat, described drainage unit is connected by rapid-acting coupling with test valve seat, described pressure test unit is connected by rapid-acting coupling with test valve seat, wherein said drainage unit comprises gas cylinder, flowmeter and surge tank, described gas cylinder is by pipeline connection traffic meter, pipeline between described flowmeter and surge tank is serially connected with needle valve and by-pass valve, described surge tank is connected with described test valve seat by rapid-acting coupling, described test valve seat connects the pipeline of tested P/V valve and other checkout equipments, described test valve seat connects described pressure test unit by rapid-acting coupling.
Wherein surge tank can be pressurized or be evacuated down to certain working pressure and maintain steady state (SS), for testing opening pressure on demand; Flowmeter is for measuring the leakage flow of test period; Needle valve should be the high-accuracy needle valve of corresponding test specification, flow needed for the test accurate adjustment of opening pressure and sealing; By-pass valve is used for arranging the required flow of test, and need not give the pressurization of P/V valve, setting required flow when namely opening, and has set rear valve-off and has made fluid flow into following device to measure P/V valve opening pressure.
Preferably, described pressure test unit is tensimeter, and described tensimeter is connected to the side of described test valve seat by rapid-acting coupling.
Preferably, described tensimeter is electronic pressure meter, maximum/little pressure of described tensimeter record test period valve.
Preferably, described flow counts mass flowmeter.
Preferably, described gas cylinder, with pressure control valve, can be the air-flow that test provides different pressures.
Preferably, described gas cylinder is built with air or nitrogen.
The utility model is the impermeability of checkout device and the correctness of assembling before use, is vertically mounted on test board by tested P/V valve as requested.
During leak-testing: (1) uses vacuum pump pressurize to surge tank (or whole proving installation) or be evacuated down to flowmeter minimum operating pressures that and maintain steady state (SS); (2) open gas cylinder, make air or nitrogen flow into proving installation; (3) needle valve of drainage unit is slowly opened, until pressure stability is on malleation (or negative pressure) original pressure of regulation; (4) pressure remained steady after certain hour (namely the change of tensimeter upward pressure reading is no more than 10pa), observes meter readings and closes the operation valve of gas cylinder; (5) repeat three malleation (or negative pressure) leak-testings, record data and calculating mean value; (6) high-pressure gas cylinder valve is closed.
During opening pressure test: (1) uses vacuum pump pressurize to surge tank (or whole proving installation) or be evacuated down to flowmeter minimum operating pressures that and maintain steady state (SS); (2) open by-pass valve, open gas cylinder, make air or nitrogen flow into proving installation; (3) slowly open needle valve, make nitrogen form malleation (or negative pressure) flow of regulation; (4) close by-pass valve after stability of flow, allow fluid flow into proving installation below; (5) observe the pressure reading on tensimeter, malleation (or negative pressure) opening pressure should in specialized range, and during unlatching, reading has a mxm., and pressure declines to some extent afterwards, records this peak value and opens by-pass valve; (6) repeat three malleation (or negative pressure) opening pressure tests, record data and calculating mean value; (7) high-pressure gas cylinder valve is closed.
Wherein, between twice opening pressure test, must disconnect and with the connection of rapid-acting coupling, tensimeter being made zero.
Compared with prior art, advantage of the present utility model and good effect are:
The utility model proving installation compact conformation, manual operation is simple and convenient, and test result is intuitively effective; The utility model good test effect, energy is simulated operation operating mode preferably; The utility model checkout equipment easy care and consume energy little.
Accompanying drawing explanation
Below in conjunction with drawings and embodiments, the utility model is described in further detail:
Fig. 1 is the test board connection diagram of P/V valve opening pressure of the present utility model and performing leak test.
In figure, 1 is gas cylinder, and 2 is flowmeter, and 3 is needle valve, and 4 is by-pass valve, and 5 is surge tank, and 6 is rapid-acting coupling, and 7 is tested P/V valve, and 8 is tensimeter, and 9 is test valve seat.
Embodiment
Embodiment
As shown in Figure 1, the test board of a kind of P/V valve opening pressure and performing leak test, test board comprises drainage unit, pressure test unit and test valve seat 9, described drainage unit is connected by rapid-acting coupling 6 with test valve seat, described pressure test unit is connected by rapid-acting coupling 6 with test valve seat 9, wherein said drainage unit comprises gas cylinder 1, flowmeter 2 and surge tank 5, described flowmeter 2 is mass flowmeter, described gas cylinder 1 is by pipeline connection traffic meter 2, described gas cylinder 1 is with pressure control valve, can be the air-flow that test provides different pressures, described gas cylinder 1 is built with air or nitrogen, pipeline between described flowmeter 2 and surge tank 5 is serially connected with needle valve 3 and by-pass valve 4, described surge tank 5 is connected with described test valve seat 9 by rapid-acting coupling 6, described test valve seat 9 connects the pipeline of tested P/V valve 7 and other checkout equipments, described test valve seat 9 connects described pressure test unit by rapid-acting coupling 6.
Wherein surge tank 5 can be pressurized or be evacuated down to certain working pressure and maintain steady state (SS), for testing opening pressure on demand; Mass flowmeter is for measuring the leakage flow of test period; Needle valve 3 should be the high-accuracy needle valve of corresponding test specification, flow needed for the test accurate adjustment of opening pressure and sealing; By-pass valve 4 for arranging the required flow of test, and need not give the pressurization of P/V valve, setting required flow when namely opening, and has set rear valve-off and has made fluid flow into following device to measure P/V valve opening pressure.
Described pressure test unit is electronic pressure meter 8, and described tensimeter 8 is connected to the side of described test valve seat 9 by rapid-acting coupling 6, and described tensimeter 8 records maximum/little pressure of test period valve.
Method of testing of the present utility model is: correctly assemble proving installation according to Fig. 1, and the end cap using fluid sealant or raw material band to install a corresponding size on test valve seat screw thread replaces P/V valve, carries out the air tightness test of proving installation:
(1) vacuum pump is used to pressurize to surge tank (or whole proving installation) or be evacuated down to mass flowmeter minimum operating pressures that and maintain steady state (SS); (2) open gas cylinder, make air or nitrogen flow into proving installation; (3) needle valve of drainage unit is slowly opened, until pressure stability is on the positive pressure pressure (being taken as 500pa) of regulation; (4) after the pressure stability of 10s, observe mass flowmeter reading and close the pressure control valve of gas cylinder.If the leakage flow recorded is less than the permission leakage flow (being taken as 2ml/min) of regulation, then represents proving installation No leakage, can following test operation be carried out.
After testing fixture impermeability is good, remove end cap, tested P/V valve be vertically connected on test valve seat, carry out following operation successively:
Malleation leak-testing:
(1) open gas cylinder, close by-pass valve, make air or nitrogen flow into proving installation;
(2) slowly needle valve is opened, until pressure stability is on the malleation original pressure (being taken as 500pa) of regulation;
(3) after the pressure stability of 10s, observe mass flowmeter reading and close the pressure control valve of gas cylinder;
(4) repeat three malleation leak-testings, record data and calculating mean value.
Malleation opening pressure is tested:
(1) open gas cylinder, open by-pass valve, slowly regulate needle valve, make air or nitrogen form the malleation flow (being taken as 120ml/min) of regulation;
(2) close by-pass valve after stability of flow, allow fluid flow into proving installation below;
(3) observe the pressure reading on tensimeter, malleation opening pressure should in GB50156 specialized range, and recording manometer peak-peak also opens by-pass valve;
(4) repeat three malleation opening pressure tests, record data and calculating mean value;
(5) high-pressure gas cylinder valve is closed.
Negative pressure leakage is tested, and setting malleation original pressure is changed into setting negative pressure original pressure (being taken as-1000pa), other operations are identical with malleation leak-testing, draw negative pressure leakage flow mean value;
Negative pressure opening pressure is tested, and setting malleation flow is changed into setting negative pressure flow (being taken as 200ml/min), other operations are tested identical with malleation opening pressure, draw negative pressure opening pressure mean value.
Obviously, above-described embodiment of the present utility model is only for the utility model example is clearly described, and is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here cannot give exhaustive to all embodiments.Every belong to the technical solution of the utility model the apparent change of amplifying out or variation be still in the row of protection domain of the present utility model.
Claims (6)
1. the test board of a P/V valve opening pressure and performing leak test, it is characterized in that: test board comprises drainage unit, pressure test unit and test valve seat, described drainage unit is connected by rapid-acting coupling with test valve seat, described pressure test unit is connected by rapid-acting coupling with test valve seat, wherein said drainage unit comprises gas cylinder, flowmeter and surge tank, described gas cylinder is by pipeline connection traffic meter, pipeline between described flowmeter and surge tank is serially connected with needle valve and by-pass valve, described surge tank is connected with described test valve seat by rapid-acting coupling, described test valve seat connects the pipeline of tested P/V valve and other checkout equipments, described test valve seat connects described pressure test unit by rapid-acting coupling.
2. the test board of P/V valve opening pressure according to claim 1 and performing leak test, is characterized in that: described pressure test unit is tensimeter, and described tensimeter is connected to the side of described test valve seat by rapid-acting coupling.
3. the test board of P/V valve opening pressure according to claim 2 and performing leak test, is characterized in that: described tensimeter is electronic pressure meter.
4. the test board of P/V valve opening pressure according to claim 1 and performing leak test, is characterized in that: described flow counts mass flowmeter.
5. the test board of P/V valve opening pressure according to claim 1 and performing leak test, is characterized in that: described gas cylinder, with pressure control valve, can be the air-flow that test provides different pressures.
6. the test board of P/V valve opening pressure according to claim 5 and performing leak test, is characterized in that: described gas cylinder is built with air or nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520815468.6U CN205038044U (en) | 2015-10-20 | 2015-10-20 | Testboard of PV valve cracking pressure and leakproofness test |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520815468.6U CN205038044U (en) | 2015-10-20 | 2015-10-20 | Testboard of PV valve cracking pressure and leakproofness test |
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| CN205038044U true CN205038044U (en) | 2016-02-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444656A (en) * | 2018-03-12 | 2018-08-24 | 盾安（芜湖）中元自控有限公司 | One linear sealing gas of shut-off valve examines cubing |
| CN110095239A (en) * | 2019-05-29 | 2019-08-06 | 深圳市宝利联合科技有限公司 | Refrigerator refrigerant non-return valve air-tightness detection device and detection method |
| CN110398327A (en) * | 2019-02-21 | 2019-11-01 | 杭州戴雷科技有限公司 | A kind of PE saddle bypass pipe fitting gas tightness testing machine |
-
2015
- 2015-10-20 CN CN201520815468.6U patent/CN205038044U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444656A (en) * | 2018-03-12 | 2018-08-24 | 盾安（芜湖）中元自控有限公司 | One linear sealing gas of shut-off valve examines cubing |
| CN110398327A (en) * | 2019-02-21 | 2019-11-01 | 杭州戴雷科技有限公司 | A kind of PE saddle bypass pipe fitting gas tightness testing machine |
| CN110398327B (en) * | 2019-02-21 | 2020-12-08 | 杭州知淞智能科技有限公司 | PE saddle type bypass pipe fitting air tightness testing machine |
| CN110095239A (en) * | 2019-05-29 | 2019-08-06 | 深圳市宝利联合科技有限公司 | Refrigerator refrigerant non-return valve air-tightness detection device and detection method |
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