CN111780965B - Breather valve ventilation test device and method - Google Patents
Breather valve ventilation test device and method Download PDFInfo
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- CN111780965B CN111780965B CN202010797463.0A CN202010797463A CN111780965B CN 111780965 B CN111780965 B CN 111780965B CN 202010797463 A CN202010797463 A CN 202010797463A CN 111780965 B CN111780965 B CN 111780965B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
Abstract
The invention discloses a breather valve ventilation test device and a breather valve ventilation test method, and aims to overcome the defects of high cost and inconvenient operation of a breather valve ventilation test. The device comprises an air compressor unit, a gas storage tank group and a detection tank, wherein an air inlet pipe is connected between the air compressor unit and the gas storage tank group, an air supply pipe is connected between the gas storage tank group and the detection tank, a butterfly valve, a flowmeter and an adjusting valve are installed on the air supply pipe, a test interface for installing a breather valve is arranged on the detection tank, and a pressure detector and a temperature detector are installed on the detection tank. The breather valve ventilation test device reduces the cost of breather valve ventilation test and is convenient to operate.
Description
Technical Field
The invention relates to a valve testing device, in particular to a breather valve ventilation testing device and a breather valve ventilation testing method.
Background
The breather valve design is stereotyped and is generally need carry out the air flow test before, adopts the fan as air power source mostly at present, and positive pressure and negative pressure are realized with the reversal through the corotation of fan, but the fan if want to reach corresponding air flow, the fan will be very big, when needs are tested the heavy-calibre valve, need dispose big fan, and the cost is higher. The breathing valve ventilation test is a pattern test in order to detect the displacement coefficient of the breathing valve. The conventional test mode has high cost and inconvenient test operation.
Disclosure of Invention
The invention overcomes the defects of high cost and inconvenient operation of the breather valve ventilation test, provides the breather valve ventilation test device and the breather valve ventilation test method, reduces the breather valve ventilation test cost, and is convenient to test and operate.
In order to solve the technical problem, the invention adopts the following technical scheme: a breather valve ventilation test device comprises an air compressor unit, a gas storage tank group and a detection tank, wherein an air inlet pipe is connected between the air compressor unit and the gas storage tank group, an air supply pipe is connected between the gas storage tank group and the detection tank, a butterfly valve, a flowmeter and an adjusting valve are installed on the air supply pipe, a test interface used for installing a breather valve is arranged on the detection tank, and a pressure detector and a temperature detector are installed on the detection tank.
When the breather valve test is operated, the method comprises the following steps: a. supplying air into the air storage tank group through an air compressor unit, and connecting a positive pressure air inlet on a breather valve with a test interface on the detection tank; b. starting the butterfly valve, the flowmeter and the regulating valve, observing the pressure value detected by the pressure detector on the detection tank, and when the pressure value detected by the pressure detector reaches the target discharge pressure of the breather valve, detecting the flow in unit time and recording q a Simultaneously recording a pressure value p and a temperature value t detected by a pressure detector and a temperature detector on the detection tank; c. closing the butterfly valve, the flowmeter and the regulating valve, detaching the breather valve and connecting a negative pressure air suction port on the breather valve with a test interface on the detection tank; d. starting the butterfly valve, the flowmeter and the regulating valve, observing the pressure value detected by the pressure detector on the detection tank, and when the pressure value detected by the pressure detector reaches the target discharge pressure of the breather valve, detecting the flow in unit time and recording q a Simultaneously recording a pressure value p and a temperature value t detected by a pressure detector and a temperature detector on the detection tank;e. and the breather valve is detached from the detection tank to complete the whole test process. And applying the data recorded in the test to the existing formula to respectively calculate the positive pressure and negative pressure discharge coefficients of the breathing valve. The air compressor unit is adopted to convey an air source to the air storage tank group to form an air power source, and the air storage tank group is large in volume and strong in detection capability. During testing, the negative pressure end of the breather valve is directly connected into the testing interface, and a vacuum pump does not need to be additionally arranged, so that equipment investment is reduced. The breather valve ventilation test device reduces the cost of breather valve ventilation test and is convenient to operate.
Preferably, the gas storage tank group comprises a plurality of gas storage tanks connected in series, and pressure gauges are installed on the gas storage tanks. The gas storage tanks are connected in series to form a gas storage tank group, so that the gas storage tank group is large in volume and strong in detection capability. The pressure gauge is convenient for controlling the pressure in the gas storage tank.
Preferably, the bore diameter of the air supply pipe is set to d, the length of the air supply pipe from the flow meter to the butterfly valve is set to L1, the length of the air supply pipe from the flow meter to the regulating valve is set to L2, L1 is more than or equal to 5d, and L2 is more than or equal to 5 d. The front end and the rear end of the flow meter are provided with longer paths, so that stable airflow is facilitated, and the flow detection accuracy is improved.
Preferably, the air compressor unit comprises an air compressor, a filter, an oil-water separator and a freeze dryer. The air compressor machine produces high-pressure gas, and the filter filters the air current, and oil water separator separates the oil water in the gas out, guarantees can not mix miscellaneous oil and water in the air current. The air flow is dried and cooled by the cold dryer.
Preferably, an installation table is arranged at a position corresponding to the test interface on the detection tank, a fixed table is connected onto the installation table, a rotatable adjusting rotary table is installed between the fixed table and the installation table, an air outlet hole is formed in the installation table, a positive pressure test hole and a negative pressure test hole are formed in the fixed table, a positive pressure corresponding hole and a negative pressure corresponding hole are formed in the adjusting rotary table, and the positive pressure corresponding hole and the negative pressure corresponding hole are communicated with the air outlet hole; rotating the adjusting rotary table to enable the positive pressure corresponding hole to be correspondingly communicated with the positive pressure test hole, and the negative pressure corresponding hole to be staggered and sealed with the negative pressure test hole, or enabling the positive pressure corresponding hole to be staggered and sealed with the positive pressure test hole, and enabling the negative pressure corresponding hole to be correspondingly communicated with the negative pressure test hole; positive pressure test hole edge equipartition is equipped with a plurality of mounting holes on the fixed station, negative pressure test hole edge is equipped with the installation cover on the fixed station, installation cover upper portion is equipped with from last sealed face that down leans out the setting, the cover is equipped with the sealing washer on the sealed face, be equipped with on the fixed station and be used for connecting the support of fastening with the breather valve, be equipped with malleation air inlet and negative pressure induction port on the breather valve, the malleation air inlet corresponds the intercommunication with the malleation test hole, the negative pressure induction port corresponds the intercommunication with the negative pressure test hole.
During the experiment, the breather valve is installed on the fixed station, and the positive pressure air inlet on the breather valve corresponds the intercommunication with the positive pressure test hole, and the negative pressure induction port corresponds the intercommunication with the negative pressure test hole, and the sealed cartridge of installation cover upper portion is to the negative pressure induction port inner wall on. The rotary adjusting rotary table is rotated to enable the positive pressure corresponding hole to be correspondingly communicated with the positive pressure test hole, the negative pressure corresponding hole is staggered and sealed with the negative pressure test hole, or the positive pressure corresponding hole is staggered and sealed with the positive pressure test hole, and the negative pressure corresponding hole is correspondingly communicated with the negative pressure test hole. Therefore, the test operation of the ventilation capacity of the positive pressure air inlet and the negative pressure air inlet of the breather valve is realized. The adjusting rotary table is directly rotated to switch in the test process, the breather valve does not need to be disassembled and then reassembled, the test process is simplified, and the test operation is more convenient.
Preferably, the breather valve is tightly connected with the mounting hole through a fastening screw, the upper part of the mounting sleeve is tightly inserted into the negative pressure air suction port, the lower end of the upper sealing surface of the mounting sleeve is provided with a supporting plane, the edge of the negative pressure air suction port on the breather valve is connected with a fixing ring, a gasket is arranged between the fixing ring and the surface of the breather valve, a gap is formed between the edge of the fixing ring and the surface of the breather valve, a locking screw is connected between the support and the gap, the fixing ring is abutted against the supporting plane, and a sealing gasket is arranged between the supporting plane and the fixing ring. The mounting sleeve is tightly and reliably connected with the breather valve.
A breather valve ventilation test method is used for testing by using a breather valve ventilation test device, and comprises the following steps: a. supplying air into the air storage tank group through an air compressor unit, and connecting a positive pressure air inlet on the breather valve with a test interface on the detection tank; b. starting the butterfly valve, the flowmeter and the regulating valve, observing the pressure value detected by the pressure detector on the detection tank, and when the pressure value detected by the pressure detector reaches the target discharge pressure of the breather valve, the flowmeterDetecting the flow per unit time and recording q a Simultaneously recording a pressure value p and a temperature value t detected by a pressure detector and a temperature detector on the detection tank; c. closing the butterfly valve, the flowmeter and the regulating valve, detaching the breather valve and connecting a negative pressure air suction port on the breather valve with a test interface on the detection tank; d. starting the butterfly valve, the flowmeter and the regulating valve, observing the pressure value detected by the pressure detector on the detection tank, and when the pressure value detected by the pressure detector reaches the target discharge pressure of the breather valve, detecting the flow in unit time and recording q a Simultaneously recording a pressure value p and a temperature value t detected by a pressure detector and a temperature detector on the detection tank; e. and the breather valve is detached from the detection tank to complete the whole test process.
A method of breath valve ventilation testing using a breath valve ventilation testing apparatus, comprising the steps of: a. supplying air into the air storage tank group through an air compressor unit, installing a breather valve on a fixed table, correspondingly communicating a positive pressure air inlet on the breather valve with a positive pressure test hole, correspondingly communicating a negative pressure air inlet with a negative pressure test hole, and hermetically inserting the upper part of an installation sleeve onto the inner wall of the negative pressure air inlet; rotating the adjusting rotary table to enable the positive pressure corresponding hole to be correspondingly communicated with the positive pressure test hole, and the negative pressure corresponding hole to be staggered and sealed with the negative pressure test hole; then, the fixed table is tightly connected with the mounting table, so that the fixed table, the adjusting rotary table and the mounting table are tightly connected together; b. starting the butterfly valve, the flowmeter and the regulating valve, observing the pressure value detected by the pressure detector on the detection tank, and when the pressure value detected by the pressure detector reaches the target discharge pressure of the breather valve, detecting the flow in unit time and recording q a Simultaneously recording a pressure value p and a temperature value t detected by a pressure detector and a temperature detector on the detection tank; c. closing the butterfly valve, the flow meter and the regulating valve, loosening the fixed table and the mounting table, rotating the regulating rotary table to enable the positive pressure corresponding hole and the positive pressure test hole to be staggered and sealed, enabling the negative pressure corresponding hole and the negative pressure test hole to be correspondingly communicated, and then fixedly connecting the fixed table and the mounting table to enable the fixed table, the regulating rotary table and the mounting table to be tightly connected together; d. starting butterfly valve, flowmeter and regulating valve, observing pressure detector on detection tank A measured pressure value, and a flow meter for detecting the flow rate per unit time and recording q when the pressure value detected by the pressure detector reaches a target discharge pressure of the breather valve a Simultaneously recording a pressure value p and a temperature value t detected by a pressure detector and a temperature detector on the detection tank; e. and the breather valve is detached from the detection tank to complete the whole test process.
Compared with the prior art, the invention has the beneficial effects that: the breather valve ventilation test device reduces the breather valve ventilation test cost and is convenient to operate.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a partial structural view of embodiment 2 of the present invention;
FIG. 3 is an enlarged partial schematic view of FIG. 2 of the present invention;
FIG. 4 is a schematic structural view of a fixed stand according to embodiment 2 of the present invention;
in the figure: 1. air compressor unit, 2, gas storage tank group, 3, detection tank, 4, air inlet pipe, 5, air feed pipe, 6, butterfly valve, 7, flowmeter, 8, regulating valve, 9, breather valve, 10, test interface, 11, pressure detector, 12, temperature detector, 13, pressure gauge, 14, safety valve, 15, mounting table, 16, fixed table, 17, regulating turntable, 18, venthole, 19, positive pressure test hole, 20, negative pressure test hole, 21, positive pressure corresponding hole, 22, negative pressure corresponding hole, 23, mounting hole, 24, mounting sleeve, 25, sealing surface, 26, sealing ring, 27, support, 28, positive pressure air inlet, 29, negative pressure air inlet, 30, support plane, 31, fixed ring, 32, gasket, 33, gap, 34, locking screw, 35, sealing ring, 36, connecting rod, 37, fastening nut, 38, rotary handle.
Detailed Description
The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings:
example 1: a breather valve ventilation test device (see attached figure 1) comprises an air compressor unit 1, a gas storage tank group 2 and a detection tank 3, wherein an air inlet pipe 4 is connected between the air compressor unit and the gas storage tank group, an air supply pipe 5 is connected between the gas storage tank group and the detection tank, a butterfly valve 6, a flowmeter 7 and a regulating valve 8 are installed on the air supply pipe, a test interface 10 for installing a breather valve 9 is arranged on the detection tank, and a pressure detector 11 and a temperature detector 12 are installed on the detection tank. The gas storage tank group comprises a plurality of gas storage tanks connected in series, and a pressure gauge 13 and a safety valve 14 are installed on each gas storage tank. The flowmeter is a plug-in flowmeter and is arranged between the butterfly valve and the regulating valve. The aperture of the air supply pipe is set to be d, the length from the flowmeter to the air supply pipe of the butterfly valve is set to be L1, the length from the flowmeter to the air supply pipe of the regulating valve is set to be L2, L1 is more than or equal to 5d, and L2 is more than or equal to 5 d. The air compressor unit comprises an air compressor, a filter, an oil-water separator and a cold dryer. The air compressor set generates high-pressure, water-free and oil-free low-temperature dry gas.
A breather valve ventilation test method is used for testing by using a breather valve ventilation test device, and comprises the following steps: a. supplying air into the air storage tank group through an air compressor unit, and connecting a positive pressure air inlet on the breather valve with a test interface on the detection tank; b. starting the butterfly valve, the flowmeter and the regulating valve, observing the pressure value detected by the pressure detector on the detection tank, and when the pressure value detected by the pressure detector reaches the target discharge pressure of the breather valve, detecting the flow in unit time and recording q a Simultaneously recording the pressure value p and the temperature value t detected by the pressure detector and the temperature detector on the detection tank, and carrying out multiple detections to obtain an average value; the target discharge can be 1.1 times, 1.2 times, 1.5 times or 2 times of positive pressure setting pressure of the breather valve; c. closing the butterfly valve, the flowmeter and the regulating valve, detaching the breather valve and connecting a negative pressure air suction port on the breather valve with a test interface on the detection tank; d. starting the butterfly valve, the flowmeter and the regulating valve, observing the pressure value detected by the pressure detector on the detection tank, and when the pressure value detected by the pressure detector reaches the target discharge pressure of the breather valve, detecting the flow in unit time and recording q a Simultaneously recording the pressure value p and the temperature value t detected by the pressure detector and the temperature detector on the detection tank, and carrying out multiple detections to obtain an average value; the target discharge can be 1.1 times, 1.2 times, 1.5 times and 2 times of the negative pressure setting pressure of the breather valve; e. the breather valve is detached from the detection tank to finish the operationThe whole test process. And applying the data recorded in the test to the existing formula to calculate the displacement coefficient of the breather valve. Discharge coefficient K = q a /q th ；
In the formula, q th As theoretical flow rate, q a And q is th The units are consistent;
A min Is the minimum flow area of the device, in cm 2 ；
p i The absolute pressure at the inlet of the device, unit KPa, refers to the pressure p + atmospheric pressure detected by the pressure detector on the detection tank;
P o is the absolute pressure at the outlet of the apparatus, in KPa, which refers to atmospheric pressure;
k is the adiabatic index of the test medium under the test conditions;
T i is the absolute temperature at the inlet of the apparatus, in units K, T i = t +273.15℃；
M is the relative molecular weight of the test medium in kg/kmol;
Z i for compressing coefficients, e.g. Z for unknown i =1。
Example 2: a breather valve ventilation test device (see attached figures 2, 3 and 4) is similar to embodiment 1 in structure, and mainly has the difference that a mounting table 15 is arranged at a position corresponding to a test interface on a detection tank in the embodiment, a fixed table 16 is connected to the mounting table, a rotatable adjusting rotary table 17 is arranged between the fixed table and the mounting table, an air outlet hole 18 is formed in the mounting table, a positive pressure test hole 19 and a negative pressure test hole 20 are formed in the fixed table, a positive pressure corresponding hole 21 and a negative pressure corresponding hole 22 are formed in the adjusting rotary table, and the positive pressure corresponding hole and the negative pressure corresponding hole are communicated with the air outlet hole; rotating the adjusting rotary table to enable the positive pressure corresponding hole to be correspondingly communicated with the positive pressure test hole, and the negative pressure corresponding hole to be staggered and sealed with the negative pressure test hole, or enabling the positive pressure corresponding hole to be staggered and sealed with the positive pressure test hole, and enabling the negative pressure corresponding hole to be correspondingly communicated with the negative pressure test hole; positive pressure test hole edge equipartition is equipped with a plurality of mounting holes 23 on the fixed station, negative pressure test hole edge is equipped with the installation cover 24 on the fixed station, installation cover upper portion is equipped with from last sealed face 25 that down leans out the setting, the cover is equipped with sealing washer 26 on the sealed face, be equipped with on the fixed station and be used for connecting the support 27 of fastening with the breather valve, be equipped with malleation air inlet 28 and negative pressure induction port 29 on the breather valve, the malleation air inlet corresponds the intercommunication with positive pressure test hole, the negative pressure induction port corresponds the intercommunication with negative pressure test hole. The breather valve passes through fastening screw and mounting hole zonulae occludens, the inseparable cartridge of mounting cover upper portion is in the negative pressure induction port, the sealed face lower extreme position is equipped with supporting plane 30 on the mounting cover, last negative pressure induction port edge connection solid fixed ring 31 of breather valve, gu install gasket 32 between fixed ring and the breather valve surface, gu form clearance 33 between fixed ring edge and the breather valve surface, connect locking screw 34 between support and the clearance, gu fixed ring butt is on supporting plane, support plane and solid fixed ring between the installation seal ring 35. Adjust and be equipped with the mounting groove on the revolving stage upper surface, be equipped with down the mounting groove on the revolving stage lower surface of regulation, be equipped with the bulge loop on the mount table, be equipped with the boss on the fixed station, the boss adaptation is installed in last mounting groove, the bulge loop adaptation is installed in mounting groove down, the equipartition is equipped with a plurality of connecting rods 36 on the mount table, the connecting rod runs through the fixed station, threaded connection fastening nut 37 on the connecting rod, the fastening nut butt is on the fixed station. The outer wall of the adjusting rotary table is provided with a plurality of rotating handles 38, the mounting table is provided with two positioning blocks, the adjusting rotary table is provided with a convex block, and the convex block is abutted to the positioning blocks to realize positioning after the adjusting rotary table rotates to the position. The other structure is the same as embodiment 1.
A method of breath valve ventilation testing using a breath valve ventilation testing apparatus, comprising the steps of: a. supplying air into the air storage tank group through an air compressor unit, installing a breather valve on a fixed table, correspondingly communicating a positive pressure air inlet on the breather valve with a positive pressure test hole, correspondingly communicating a negative pressure air inlet with a negative pressure test hole, and hermetically inserting the upper part of an installation sleeve onto the inner wall of the negative pressure air inlet; rotating the adjusting rotary table to enable the positive pressure corresponding hole to be correspondingly communicated with the positive pressure test hole, and the negative pressure corresponding hole to be staggered and sealed with the negative pressure test hole; then, the fixed table is tightly connected with the mounting table, so that the fixed table, the adjusting rotary table and the mounting table are tightly connected together; b. starting butterfly valve, flowmeter and regulating valve, observing and checkingMeasuring the pressure value detected by the pressure detector on the tank, and when the pressure value detected by the pressure detector reaches the target discharge pressure of the breather valve, detecting the flow rate in unit time and recording q a Simultaneously recording a pressure value p and a temperature value t detected by a pressure detector and a temperature detector on the detection tank; the target discharge can be 1.1 times, 1.2 times, 1.5 times and 2 times of positive pressure setting pressure of the breathing valve; c. closing the butterfly valve, the flow meter and the regulating valve, loosening the fixed table and the mounting table, rotating the regulating rotary table to enable the positive pressure corresponding hole and the positive pressure test hole to be staggered and sealed, enabling the negative pressure corresponding hole and the negative pressure test hole to be correspondingly communicated, and then fixedly connecting the fixed table and the mounting table to enable the fixed table, the regulating rotary table and the mounting table to be tightly connected together; d. starting the butterfly valve, the flowmeter and the regulating valve, observing the pressure value detected by the pressure detector on the detection tank, and when the pressure value detected by the pressure detector reaches the target discharge pressure of the breather valve, detecting the flow in unit time and recording q a Simultaneously recording a pressure value p and a temperature value t detected by a pressure detector and a temperature detector on the detection tank; the target discharge can be 1.1 times, 1.2 times, 1.5 times and 2 times of the negative pressure setting pressure of the breather valve; e. and the breather valve is detached from the detection tank to complete the whole test process.
And applying the data recorded in the test to the existing formula to calculate the displacement coefficient of the breather valve. Coefficient of displacement K = q a /q th (ii) a Wherein
In the formula, q th As theoretical flow rate, q a And q is th The units are consistent;
A min is the minimum flow area of the device, in cm 2 ；
p i The absolute pressure at the inlet of the device, unit KPa, refers to the pressure p + atmospheric pressure detected by the pressure detector on the detection tank;
P o is the absolute pressure at the outlet of the apparatus, in KPa, atmospheric pressure;
k is the adiabatic index of the test medium under the test conditions;
T i is the absolute temperature at the inlet of the apparatus, in units K, T i = t +273.15℃；
M is the relative molecular weight of the test medium in kg/kmol;
Z i for compressing coefficients, e.g. Z for unknown i =1。
The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to be limiting in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the appended claims.
Claims (6)
1. A breather valve ventilation test device is characterized by comprising an air compressor unit, an air storage tank group and a detection tank, wherein an air inlet pipe is connected between the air compressor unit and the air storage tank group, an air supply pipe is connected between the air storage tank group and the detection tank, a butterfly valve, a flowmeter and an adjusting valve are installed on the air supply pipe, a test interface for installing a breather valve is arranged on the detection tank, and a pressure detector and a temperature detector are installed on the detection tank; the test device comprises a test tank, a rotary adjusting rotary table, a positive pressure test hole, a negative pressure test hole, a positive pressure corresponding hole, a negative pressure corresponding hole, a gas outlet hole, a gas inlet hole, a gas outlet hole, a gas inlet hole, a gas outlet hole; rotating the adjusting rotary table to enable the positive pressure corresponding hole to be correspondingly communicated with the positive pressure test hole, and the negative pressure corresponding hole to be staggered and sealed with the negative pressure test hole, or enabling the positive pressure corresponding hole to be staggered and sealed with the positive pressure test hole, and enabling the negative pressure corresponding hole to be correspondingly communicated with the negative pressure test hole; positive pressure test hole edge equipartition is equipped with a plurality of mounting holes on the fixed station, negative pressure test hole edge is equipped with the installation cover on the fixed station, installation cover upper portion is equipped with from last sealed face that down leans out the setting, the cover is equipped with the sealing washer on the sealed face, be equipped with on the fixed station and be used for connecting the support of fastening with the breather valve, be equipped with malleation air inlet and negative pressure induction port on the breather valve, the malleation air inlet corresponds the intercommunication with the malleation test hole, the negative pressure induction port corresponds the intercommunication with the negative pressure test hole.
2. The apparatus for testing ventilation of a breather valve according to claim 1, wherein the set of gas tanks includes a plurality of gas tanks connected in series, and a pressure gauge is installed on each of the gas tanks.
3. The apparatus for testing the ventilation of a breather valve according to claim 1, wherein the bore diameter of the air supply pipe is set to d, the length of the air supply pipe from the flow meter to the butterfly valve is set to L1, the length of the air supply pipe from the flow meter to the regulating valve is set to L2, L1 is not less than 5d, and L2 is not less than 5 d.
4. The breather valve ventilation test device of claim 1, wherein the air compressor unit comprises an air compressor, a filter, an oil-water separator and a refrigeration dryer.
5. The breather valve ventilation test device of claim 1, wherein the breather valve is tightly connected with the mounting hole through a fastening screw, the upper part of the mounting sleeve is tightly inserted into the negative pressure air suction port, a supporting plane is arranged at the lower end of the upper sealing surface of the mounting sleeve, the edge of the negative pressure air suction port on the breather valve is connected with a fixing ring, a gasket is arranged between the fixing ring and the surface of the breather valve, a gap is formed between the edge of the fixing ring and the surface of the breather valve, a locking screw is connected between the supporting seat and the gap, the fixing ring is abutted against the supporting plane, and a sealing gasket is arranged between the supporting plane and the fixing ring.
6. A method of testing ventilation of a breather valve using the apparatus of claim 1, comprising the steps of: a. supplying air into the air storage tank group through an air compressor unit, installing a breather valve on a fixed table, correspondingly communicating a positive pressure air inlet on the breather valve with a positive pressure test hole, correspondingly communicating a negative pressure air inlet with a negative pressure test hole, and hermetically inserting the upper part of an installation sleeve onto the inner wall of the negative pressure air inlet; rotating the adjusting rotary table to enable the positive pressure corresponding hole to be correspondingly communicated with the positive pressure test hole, and the negative pressure corresponding hole to be staggered and sealed with the negative pressure test hole; then the fixed table is tightly connected with the mounting table, so that the fixed table, the adjusting rotary table and the mounting table are tightly connected together(ii) a b. Starting the butterfly valve, the flowmeter and the regulating valve, observing the pressure value detected by the pressure detector on the detection tank, and when the pressure value detected by the pressure detector reaches the target discharge pressure of the breather valve, detecting the flow in unit time and recording q a Simultaneously recording a pressure value p and a temperature value t detected by a pressure detector and a temperature detector on the detection tank; c. closing the butterfly valve, the flow meter and the regulating valve, loosening the fixed table and the mounting table, rotating the regulating rotary table to enable the positive pressure corresponding hole and the positive pressure test hole to be staggered and sealed, enabling the negative pressure corresponding hole and the negative pressure test hole to be correspondingly communicated, and then fixedly connecting the fixed table and the mounting table to enable the fixed table, the regulating rotary table and the mounting table to be tightly connected together; d. starting the butterfly valve, the flowmeter and the regulating valve, observing the pressure value detected by the pressure detector on the detection tank, and when the pressure value detected by the pressure detector reaches the target discharge pressure of the breather valve, detecting the flow in unit time and recording q a Simultaneously recording a pressure value p and a temperature value t detected by a pressure detector and a temperature detector on the detection tank; e. and the breather valve is detached from the detection tank to complete the whole test process.
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| CN114323968A (en) * | 2021-11-12 | 2022-04-12 | 中国矿业大学 | Single-gas-source positive-negative-pressure adjustable testing device and testing method |
| CN114441164B (en) * | 2021-12-21 | 2023-10-03 | 合肥通用机械研究院有限公司 | Balance composite test system and method for low-temperature breather valve |
| CN114441166B (en) * | 2021-12-21 | 2024-02-20 | 合肥通用机械研究院有限公司 | Ultralow temperature and micro-positive pressure coupling generating device |
| CN117268742B (en) * | 2023-11-21 | 2024-01-30 | 山东业翔检测有限公司 | On-line detection device and detection method for breather valve |
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| CN211117826U (en) * | 2019-12-13 | 2020-07-28 | 罗浮阀门集团有限公司 | Breather valve |
-
2020
- 2020-08-10 CN CN202010797463.0A patent/CN111780965B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103335830A (en) * | 2013-06-24 | 2013-10-02 | 武汉亚普汽车塑料件有限公司 | Automobile fuel tank valve function testing device |
| CN106224631A (en) * | 2016-07-19 | 2016-12-14 | 中国人民解放军总后勤部油料研究所 | A kind of breather valve on-line measuring device and method |
| CN109900472A (en) * | 2019-03-07 | 2019-06-18 | 宁波市劳动安全技术服务公司 | A kind of breather valve on-line measuring device |
| CN110207976A (en) * | 2019-07-10 | 2019-09-06 | 浙江省泵阀产品质量检验中心（永嘉县质量技术监督检测研究院） | A kind of automobile-used breather valve intelligent type comprehensive test device of oil tank |
| CN211117826U (en) * | 2019-12-13 | 2020-07-28 | 罗浮阀门集团有限公司 | Breather valve |
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