CN202916060U - Liquefied petroleum gas cylinder valve high-low pressure sealing one-step detection method detection apparatus - Google Patents
Liquefied petroleum gas cylinder valve high-low pressure sealing one-step detection method detection apparatus Download PDFInfo
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- CN202916060U CN202916060U CN 201220634721 CN201220634721U CN202916060U CN 202916060 U CN202916060 U CN 202916060U CN 201220634721 CN201220634721 CN 201220634721 CN 201220634721 U CN201220634721 U CN 201220634721U CN 202916060 U CN202916060 U CN 202916060U
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Abstract
Provided is a liquefied petroleum gas cylinder valve high-low pressure sealing one-step detection method detection apparatus, belonging to the measurement field and aiming to overcome the disadvantages of many steps, low efficiency and high costs of a present test method. The detection apparatus comprises a detection bench, a valve fixing base installed on the detection bench and used for fixing a liquefied petroleum gas cylinder valve, a side plugging mechanism installed on the detection bench and used for plugging an outlet of the liquefied petroleum gas cylinder valve, an electric control system and a gas inflating and exhausting system. The difference lies in that a side plugging block in the side plugging mechanism is provided with a gas port communicating with the cylinder valve outlet and a gas inflating hole in connection with a test gas source; the inner of the side plugging block is provided with a gas port plugging shaft; the gas port and the gas inflating hole are in communication through a plugging shaft installation hole when the plugging shaft leaves from the gas port; the detection bench is provided with a side plugging block mobile cylinder, a plugging shaft mobile cylinder, a gas inflating tube, a gas exhausting tube, a gas inflating stop valve and a gas exhausting stop valve. The detection apparatus can use compressed air as test gas to detect the sealing performance of a gas cylinder valve by one step. Compared with a present air pressure detection method, the detection apparatus simplifies steps, raises efficiency and reduces costs.
Description
Technical field
The utility model belongs to fields of measurement, is specifically related to adopt pressure differential method to detect the sealing property of liquefied petroleum gas cylinder valve.
Background technology
The manufacturer of liquefied petroleum gas cylinder valve following two kinds of methods commonly used were carried out the high-low pressure sealing property to liquefied petroleum gas cylinder valve and detected in the past: it 1 is according to GB 7512-2006 " liquefied petroleum gas cylinder valve ", adopt water cannot detect the impermeability of liquefied petroleum gas cylinder valve, namely adopt manual mode that liquefied petroleum gas cylinder valve is screwed respectively to the closure or openness state, put into water after being full of air, whether have Bubble formation, produce the degree of how much judging leakage of bubble by certain hour if observing.This detection method advantage is simple to operate, does not need the higher technology of operating personnel, with the naked eye just can determine the particular location of leakage; Shortcoming is to be affected by human factors, and manual operation error is larger, can't carry out quantitative analysis to leakage, can't realize the production automation, and production efficiency is low, and testing cost is high, and operator's hand need be immersed in the water for a long time, neither also wound body of science;
It 2 is that the method that adopts gas sensor to detect gas concentration detects the liquefied petroleum gas cylinder valve sealing property, test gas adopts the mixed air that is comprised of hydrogen and nitrogen, liquefied petroleum gas cylinder valve is in respectively under the opening and closing two states finishes the detection of high-low pressure sealing property at the monitor station of opening and closing respectively.The liquefied petroleum gas cylinder valve that at first will be in opening in the operating process is placed on the liquefied petroleum gas cylinder valve opening low pressure seal monitor station, after the import of equipment automatic plugging liquefied petroleum gas cylinder valve and the outlet, be filled with the combination gas that is formed by hydrogen and nitrogen from its import, behind the pressurize certain hour, detect hydrogen such as gas sensor, liquefied petroleum gas cylinder valve seal gasket or O type circle poor sealing are described, leakage is arranged, otherwise then without revealing; The liquefied petroleum gas cylinder valve that will be in again afterwards opening is placed on the liquefied petroleum gas cylinder valve opening high pressure sealing monitor station, after the import of equipment automatic plugging liquefied petroleum gas cylinder valve and the outlet, be filled with the combination gas that is formed by hydrogen and nitrogen from its import, behind the pressurize certain hour, detect hydrogen such as gas sensor, liquefied petroleum gas cylinder valve seal gasket or O type circle poor sealing are described, leakage is arranged, otherwise then without revealing; With certain moment of torsion it is closed screwing worktable under opening, detecting qualified liquefied petroleum gas cylinder valve more afterwards, be placed on again on the liquefied petroleum gas cylinder valve closure state high pressure sealing monitor station, after the import of equipment automatic plugging liquefied petroleum gas cylinder valve and the outlet, be filled with the combination gas that is formed by hydrogen and nitrogen from its import, behind the pressurize certain hour, detect hydrogen such as gas sensor, valve and the valve body surface of contact poor sealing of liquefied petroleum gas cylinder valve are described, leakage is arranged, otherwise then without revealing.
Obviously, although detecting the method for gas concentration, gas sensor can carry out quantitative analysis to leakage, and can realize the production automation, but the greatest problem that exists is the detection with liquefied petroleum gas cylinder valve to be divided into the opening and closing two states and to finish step by step, the each detection of gas sensor also needs stabilization time of growing after finishing when detecting simultaneously, the serviceable life of gas sensor is shorter again, and adopting again the combination gas that is comprised of hydrogen and nitrogen is test gas, not only the running program complexity is loaded down with trivial details for this, inefficiency, and waste time and energy, the checkout equipment investment is large, and testing cost is high.
Summary of the invention
The purpose of this utility model just provides a kind of one step of liquefied petroleum gas cylinder valve high-low pressure sealing detection method pick-up unit, be implemented in liquefied petroleum gas cylinder valve and only be in closed state and finish high pressure or low pressure seal Performance Detection next time, overcome that the detecting step that has now at pick-up unit is many, time length, complicated operation, cost height, inefficient shortcoming.
Pick-up unit of the present utility model comprises monitor station, is installed on the monitor station valve holder that is used for fixing liquefied petroleum gas cylinder valve, the side seal that is installed in the shutoff liquefied petroleum gas cylinder valve outlet on the monitor station blocks up mechanism, electric-control system, inflating and exhausting system; Be with the difference of existing inflation pressurize cylinder valve pick-up unit: have in the side seal sprue that dock with the cylinder valve outlet in the stifled mechanism of side seal and pass to gas port that cylinder valve exports and the air-filled pore of connecting test source of the gas, movably gas port import shutoff axle is housed in the side seal sprue, the import of gas port is on the end face of shutoff axle mounting hole, the outlet of air-filled pore is on the side of shutoff axle mounting hole, and gas port is communicated with through shutoff axle mounting hole with air-filled pore after satisfying the shutoff axle and recessing gas port, there is packing washer holding end with the cylinder valve outlet on the side seal sprue, block head is installed in the holding end of shutoff axle and gas port, and the installation side plugging block moves cylinder and the shutoff axle moves cylinder on the monitor station; Inflating and exhausting system comprises the gas-filled tube, the inflation stop valve on the gas-filled tube that connect the air-filled pore import on the side seal sprue, is connected to the gas outlet on the gas-filled tube between inflation stop valve and the import of side seal sprue air-filled pore, the discharge line valve on the gas outlet; Electric-control system comprises PLC, be installed in pressure transducer, side seal sprue on the side seal sprue moves control solenoid valve, the testing result display that cylinder control solenoid valve, shutoff axle move the stop valve of cylinder control solenoid valve, inflating and exhausting system, and pressure transducer operating air pressure input hole wherein is communicated with on gas port.
The utility model is based on: whether liquefied petroleum gas cylinder valve valve place only tests closure state leakage, whether the purpose of opening is to leak in order to test O type circle and sealing gasket, and liquefied petroleum gas cylinder valve is in closed and unlatching two states, the contacted sealing gasket state consistency of O type circle between valve rod and the bonnet and valve rod, bonnet and valve body, only need detect O type circle and the sealing gasket sealing property of a kind of state of closure or openness, get final product the sealing property of qualitative another kind of state.
The beneficial effects of the utility model be with needed to open valve in the past, connected source of the gas, inflated, close source of the gas, pressurize is measured, compare result, the test gas of draining, again valve-off, connect source of the gas, inflate, close source of the gas, pressurize is measured, compare to get two step mixed gas air-sensitive detection methods of a plurality of links such as result, the test gas of draining, be simplified to and only have connection source of the gas, inflation, pressurize to measure, calculate comparison result, and the step pressure detection method take pressurized air as test gas.Reduced detection time greatly, simplified detecting step, reduced testing cost, improved detection efficiency, especially for requiring 100% detected safety product, its efficient improves significantly.
Description of drawings
Fig. 1 is the utility model liquefied petroleum gas cylinder valve air-tightness detection device one-piece construction synoptic diagram.
Embodiment
Consult Fig. 1, pick-up unit of the present invention comprises monitor station (frame), is installed on the monitor station valve holder 2 that is used for fixing liquefied petroleum gas cylinder valve 1, the side seal that is installed in the shutoff liquefied petroleum gas cylinder valve outlet on the stand blocks up mechanism, electric-control system, inflating and exhausting system; Have in the side seal sprue 3 that dock with the cylinder valve outlet in the stifled mechanism of side seal and pass to gas port 5 that cylinder valve exports and the air-filled pore 9 of connecting test source of the gas, movably gas port import shutoff axle 6 is housed in side seal sprue 3, the import of gas port 5 is on the end face of shutoff axle mounting hole, the outlet of air-filled pore 9 is on the side of shutoff axle mounting hole, and satisfy the shutoff axle and recess gas port 5 rear gas ports 5 and be communicated with through shutoff axle mounting hole with air-filled pore 9, the installation side plugging block moves cylinder 10 and the shutoff axle moves cylinder 11 on the monitor station, side seal sprue 3 has packing washer 4 with the holding end of cylinder valve outlet, and shutoff axle 6 is installed block head 7 with the holding end of gas port; Inflating and exhausting system comprises the gas-filled tube 14, the inflation stop valve 15 on the gas-filled tube that connect air-filled pore 9 imports on the side seal sprue, is connected to gas outlet, the discharge line valve on the gas outlet 16 on the gas-filled tube 14 between inflation stop valve 15 and air-filled pore 9 imports; Electric-control system comprises PLC, be installed in pressure transducer 8, side seal sprue on the side seal sprue moves control solenoid valve 17, the control solenoid valve 18 of discharge line valve 16, the testing result display screen 19 that cylinder control solenoid valve 12, shutoff axle move cylinder control solenoid valve 13, inflation stop valve 15, and pressure transducer operating air pressure input hole is communicated with on gas port 5.
The course of work of the pick-up unit in the present embodiment is: get the YSQ-3 type liquefied petroleum gas cylinder valve 1 that is in closure state, after being fastened on it on valve holder 2, cylinder 10 actions, 1 outlet of side seal sprue 3 shutoff liquefied petroleum gas cylinder valves, under the state of gas port 5 and air-filled pore 9 connections, stop valve 15 is opened, be filled with test gas, when pressure transducer records pressure P 1 to reach setting value high pressure 2.5MPa≤P1≤3MPa(low pressure is 0.05MPa≤P1≤0.1MPa), cylinder 11 actions, gas port shutoff axle 6 shutoff gas ports 5, cut off gas port 5 and air-filled pore 9, gas port 5 forms the closed test chamber with the liquefied petroleum gas cylinder valve exit, stop valve 15 is closed, stop valve 16 is opened, setting value T1(stabilization time through a setting can arrange), be not less than pressure set points 2.5MPa(GB 7512-2006 to require high pressure be 2.5MPa when pressure transducer 8 records pressure, low pressure is 0.05Mpa) time, carry out sealing detection, pressure transducer 8 records first pressure value P2, pressurize certain hour setting value T2(can arrange), pressure transducer 8 records second pressure value P3 again, calculates amount of leakage Δ P=P2-P3.Allow amount of leakage P4(to arrange according to testing result and liquefied petroleum gas cylinder valve) relatively, such as Δ P≤P4, showing that the screen display liquefied petroleum gas cylinder valve seals qualified testing result, such as Δ P＞P4, show that liquefied petroleum gas cylinder valve seals underproof testing result.When gas port shutoff axle 6 shutoff gas ports, cut off gas port 5 and air-filled pore 9, gas port 5 forms the closed test chamber with the liquefied petroleum gas cylinder valve exit, stop valve 15 is closed, stop valve 16 is opened, through one stabilization time setting value T1(can arrange), pressure transducer 8 records pressure, and to be lower than pressure set points high pressure 2.5MPa(low pressure be 0.05MPa) time, show that liquefied petroleum gas cylinder valve seals underproof testing result.
Claims (1)
1. liquefied petroleum gas cylinder valve high-low pressure sealing one goes on foot the detection method pick-up unit, comprise monitor station, be installed in and be used for the fixedly valve holder of liquefied petroleum gas cylinder valve on the monitor station, be slidingly mounted on the stifled mechanism of side seal of the shutoff liquefied petroleum gas cylinder valve outlet on the monitor station, electric-control system, inflating and exhausting system, it is characterized in that: have in the side seal sprue that dock with the cylinder valve outlet in the stifled mechanism of side seal and pass to gas port that cylinder valve exports and the air-filled pore of connecting test source of the gas, movably gas port import shutoff axle is housed in the side seal sprue, the import of gas port is on the end face of shutoff axle mounting hole, the outlet of air-filled pore is on the side of shutoff axle mounting hole, and gas port is communicated with through shutoff axle mounting hole with air-filled pore after satisfying the shutoff axle and recessing gas port, there is packing washer holding end with the cylinder valve outlet on the side seal sprue, block head is installed in the holding end of shutoff axle and gas port, and the installation side plugging block moves cylinder and the shutoff axle moves cylinder on the monitor station; Inflating and exhausting system comprises the gas-filled tube, the inflation stop valve on the gas-filled tube that connect the air-filled pore import on the side seal sprue, is connected to the gas outlet on the gas-filled tube between inflation stop valve and the import of side seal sprue air-filled pore, the discharge line valve on the gas outlet; Electric-control system comprises PLC, be installed in pressure transducer, side seal sprue on the side seal sprue moves control solenoid valve, the testing result display that cylinder control solenoid valve, shutoff axle move the stop valve of cylinder control solenoid valve, inflating and exhausting system, and pressure transducer operating air pressure input hole wherein is communicated with on gas port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220634721 CN202916060U (en) | 2012-11-27 | 2012-11-27 | Liquefied petroleum gas cylinder valve high-low pressure sealing one-step detection method detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220634721 CN202916060U (en) | 2012-11-27 | 2012-11-27 | Liquefied petroleum gas cylinder valve high-low pressure sealing one-step detection method detection apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN202916060U true CN202916060U (en) | 2013-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220634721 Withdrawn - After Issue CN202916060U (en) | 2012-11-27 | 2012-11-27 | Liquefied petroleum gas cylinder valve high-low pressure sealing one-step detection method detection apparatus |
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| CN (1) | CN202916060U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928183A (en) * | 2012-11-27 | 2013-02-13 | 长春工业大学 | High-low-pressure sealed one-step detecting method and detecting device of liquefied petroleum gas cylinder valve |
| CN105067202A (en) * | 2015-07-24 | 2015-11-18 | 成都秦川科技发展有限公司 | Electromechanical valve tightness intelligent detection device and detection method thereof |
-
2012
- 2012-11-27 CN CN 201220634721 patent/CN202916060U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928183A (en) * | 2012-11-27 | 2013-02-13 | 长春工业大学 | High-low-pressure sealed one-step detecting method and detecting device of liquefied petroleum gas cylinder valve |
| CN105067202A (en) * | 2015-07-24 | 2015-11-18 | 成都秦川科技发展有限公司 | Electromechanical valve tightness intelligent detection device and detection method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130501 Effective date of abandoning: 20151223 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |