CN210417787U - High liquid level test system of refueling vehicle - Google Patents
High liquid level test system of refueling vehicle Download PDFInfo
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- CN210417787U CN210417787U CN201920942543.3U CN201920942543U CN210417787U CN 210417787 U CN210417787 U CN 210417787U CN 201920942543 U CN201920942543 U CN 201920942543U CN 210417787 U CN210417787 U CN 210417787U
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- 238000012360 testing method Methods 0.000 title claims abstract description 86
- 239000007788 liquid Substances 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 6
- 238000005188 flotation Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001815 facial effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Abstract
The utility model relates to a refuel high liquid level test system of car belongs to tank vehicle liquid level control technical field. The system comprises an oil filling bottom valve and an oil filling bottom valve at the bottom of an oil tank, a high liquid level switch and a breather valve at the top of the oil tank; a valve core linked with the bottom buoy is arranged in the high liquid level switch; the bottom of the floating barrel is provided with a test air cavity which can expand vertically and stretch elastically; the test air cavity is connected with an air source and an air inlet of the high liquid level switch through a test port and a branch behind a first two-position three-way air control valve and an on-off control piece, the first two-position three-way air control valve is provided with an air pressure driving on position and a pressure relief resetting position, and an air outlet of the high liquid level switch is also connected with the air pressure driving air inlet of the first two-position three-way air control valve in a branch mode. The utility model discloses because the gaseous continuation input of test port is cut off in good time to the self feedback of ingenious high liquid level switch of utilizing to effectively guaranteed the intact harmless of test air cavity when carrying out the high liquid level test of flotation pontoon with the help of high pressurized air source.
Description
Technical Field
The utility model relates to a high liquid level test system, especially a high liquid level test system of refueling vehicle belongs to tank vehicle liquid level control technical field.
Background
As shown in fig. 1, it is common for aircraft fuelling vehicles to have a bottom tank 1 with a bottom fill valve 2 and a bottom fill valve 5 at the bottom and a top level switch 3 at the top, the high level switch 3 having an air inlet P on one side communicating with an air source G and an air outlet a on the other side communicating with a bottom valve switch 4 and having a float bowl 3-1 inside which is connected to a spool. When the float bowl is in a sinking position, the valve core is in an opening state which enables the air inlet to be communicated with the air outlet, and when the float bowl is in a floating position, the valve core is in a stopping state which enables the air inlet to be not communicated with the air outlet; the bottom valve switch has an open state corresponding to the on state of the high liquid level switch and an off state corresponding to the off state of the high liquid level switch. Therefore, in the process of loading oil by the oil loading bottom valve, when the oil tank is not full and the high liquid level switch is in an opening state because the floating barrel is not floated, the bottom valve switch is in an openable ventilation state under the action of air pressure from a high-pressure air source (namely an upper loading air source), the oil loading bottom valve is opened under the action of the air pressure after the bottom valve switch is controlled to be in the ventilation state, and the oil loading bottom valve continues to load the oil into the oil tank; when the oil tank is full and the high liquid level switch is in a cut-off state due to floating of the floating barrel, the bottom valve switch is automatically in a gas-off state under the self-resetting action, and the oil-loading bottom valve automatically resets and closes after losing pressure, so that oil loading is stopped continuously and oil in the oil tank is prevented from flowing back.
In essence, the high level switch shown in fig. 1 is used in series with a pneumatically controlled oil bottom valve, and when the oil in the tank is loaded to a predetermined height, the float bowl in the high level switch floats upwards to trigger the valve core to cut off the air passage, thereby closing the oil bottom valve. The opening and closing performance of the high liquid level switch not only determines whether the oil filling operation can be normally operated, but also concerns about the oil filling safety, so that the buoy of the high liquid level switch needs to be checked regularly.
The existing high liquid level switch test structure is shown in figure 2, the upper part of the high liquid level switch is inserted on an oil tank 1 through a flange 1-1, the bottom of a buoy 3-1 connected with a valve core in the high liquid level switch is provided with a test air cavity 3-2 capable of expanding vertically and elastically, and the test air cavity 3-2 is connected to a test port 3-3 of an external air source through a pipeline. During testing, only a proper amount of gas is injected into the testing gas cavity, the testing gas cavity can expand and jack up the buoy to simulate the floating of the buoy after oil is loaded, and after the gas in the testing gas cavity is released, the testing gas cavity recovers and the buoy resets accordingly; therefore, the aim of testing whether the buoy is normal can be fulfilled. The sensitivity of the test structure is high, but the test air cavity can not be directly connected with a high-pressure air source for an airplane refueling truck, otherwise, the test air cavity is easily damaged by continuous high pressure. Therefore, at present, an air pump is often equipped, and the air pump is used for inflating the test port and then observing the test port during testing. The simple method is complicated in operation and low in efficiency, and therefore suffers from the following problems.
Furthermore, there is the problem that the tank 1 of the aircraft fuelling vehicle is provided with a breather valve 6, as required by the relevant standards (QC/T1064 and 2017 road transport flammable liquid hazardous cargo tank vehicle breather valve). Because the air suction opening pressure of the breather valve is-4 kPa to-2 kPa, the oil tank always keeps negative pressure during the oil filling process, at the moment, the gas in the test gas cavity expands to enable the test gas cavity to jack up the buoy as in a test state, and as a result, the oil filling bottom valve is always kept in a closed state and cannot be normally switched to oil filling operation.
Disclosure of Invention
The utility model discloses a first aim at: aiming at the problems in the prior art, the high liquid level test system of the refueling truck is provided, which can ensure that a test air cavity is not damaged when the buoy high liquid level test is completed by means of an upper air source, thereby greatly facilitating the test operation.
The utility model discloses further aim at: the high liquid level test system can effectively avoid the test air cavity from expanding due to negative pressure, thereby ensuring the normal oil filling and filling of the aircraft refueling truck.
In order to reach above primary objective, the utility model discloses refuel car high liquid level test system's technical scheme as follows: the device comprises an oil filling bottom valve and an oil filling bottom valve which are arranged at the bottom of an oil tank, and a high liquid level switch and a breather valve which are arranged at the top of the oil tank; the high liquid level switch is externally provided with an air inlet and an air outlet, and is internally provided with a valve core linked with the bottom buoy; when the float bowl is in a sinking position, the valve core is in an opening state which enables the air inlet to be communicated with the air outlet; when the buoy is in a floating position, the valve core is in a cut-off state which enables the air inlet and the air outlet to be blocked; the oil filling bottom valve is provided with a controlled opening state corresponding to the ventilation state of the air control bottom valve switch and a reset closing state corresponding to the air-off reset state of the air control bottom valve switch; the bottom of the floating barrel is provided with a test air cavity capable of expanding vertically and elastically stretching;
the test air cavity is branched to be connected with an air source and an air inlet of the high liquid level switch through a test port through a first two-position three-way pneumatic control valve and an on-off control piece, the first two-position three-way pneumatic control valve is provided with an air pressure driving on position and a pressure relief resetting position, and an air outlet of the high liquid level switch is further branched to be communicated with the air pressure driving air inlet of the first two-position three-way pneumatic control valve.
When the fuelling vehicle is not fully loaded, a high liquid level test is carried out, a gas source switch is opened to enable high-pressure gas to enter from a port P and exit from a port A of the high liquid level switch and lead to a pneumatic driving gas inlet of a first two-position three-way pneumatic control valve, and the valve is in a connection position; and then, the air source and the air path are controlled to be communicated, so that high-pressure air is communicated to the testing port of the high liquid level switch, the testing air cavity expands and the buoy floats under normal conditions, the valve core of the high liquid level switch blocks the air inlet and the air outlet, the air pressure of the first two-position three-way air control valve drives the air inlet to be cut off, the first two-position three-way air control valve resets to block the air path, and the continuous air transmission of the testing air cavity is cut off. The result flotation pontoon sinks at the action of gravity and resets, and the test air cavity loses heart, and the case switches over to the open mode of air inlet and gas outlet intercommunication, and high liquid level switch's P, A mouths put through once more, and the process above the repetition, the reciprocal lift of flotation pontoon, until the test observation is accomplished, control and block the air supply gas circuit, stop the test. The continuous input of the gas at the test port is cut off in due time by skillfully utilizing the self feedback of the high liquid level switch, so that the integrity of the test gas cavity is effectively ensured when the high liquid level test of the buoy is carried out by means of a high-pressure gas source.
In order to achieve a further purpose, the on-off control piece is formed by combining a second two-position three-way pneumatic control valve and the on-off control valve, the air source is communicated with an air pressure driving air inlet of the second two-position three-way pneumatic control valve through the on-off control valve, and the second two-position three-way pneumatic control valve is provided with a branch passage position for enabling an air pressure driving branch to be communicated with the air source and the high liquid level switch air inlet and a tank communicating position for enabling the oil tank to be communicated in a pressure relief reset mode.
Like this, when refueling, first two three-way air control valve will be in the switch-on position, controls the air supply that the two three-way air control valve air pressure of on-off control valve control disconnection second drives the air inlet this moment, makes it be in logical jar position, can make jar interior and test air cavity intercommunication, keeps both pressure balance, and the inflation can not appear in the test air cavity among the operation process of refueling to the aircraft tank service truck has been guaranteed to refuel and the oil charging normally. When the buoy needs to be tested, the on-off control valve is controlled to control the air source to be communicated with the air pressure driving air inlet of the second two-position three-way air control valve, the second two-position three-way air control valve can be switched to the branch passage position to block the tank passing position, and then operation similar to the basic technical scheme can be carried out, so that the buoy is safe and convenient, and the damage of a testing air cavity can be avoided.
The utility model discloses further perfect is: and a quick exhaust valve is arranged between the air control bottom valve switch and the oil filling bottom valve.
The utility model discloses further perfection is again: and the air outlet of the high liquid level switch is communicated with the air pressure driving air inlet of the first two-position three-way pneumatic control valve through a built-in quick exhaust valve.
Drawings
Fig. 1 is a schematic structural diagram of a high liquid level testing system of a refueling truck in the prior art.
Fig. 2 is a schematic diagram of a test structure of a high level switch of the prior art.
Fig. 3 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a second embodiment of the present invention.
Detailed Description
Example one
The high liquid level testing system of the refueling truck of the embodiment is shown in fig. 3, an oil filling bottom valve 2 (HDF Qs-100/10C model of chongqing science and technology development limited) and a refueling bottom valve 5 (the same as the oil filling bottom valve) are arranged at the bottom of an oil tank 1, and a high liquid level switch 3 (HANV-3 SP-500 model of aegaku f.a. sensing limited, germany) and a breather valve 6 (KT 031 model of kepeng liquid flow limited, york) are arranged at the top of the oil tank 1. The high liquid level switch 3 is externally provided with an air inlet P and an air outlet A, and is internally provided with a valve core linked with the bottom float 3-1. The air outlet A is communicated with an air control bottom valve switch 4 and an air pressure driving air inlet of the air control bottom valve switch 4, which control the oil filling bottom valve 2 through a quick exhaust valve 12 (VSC-554-1/4 model of Shanghai Kangsheng pneumatic control element Co., Ltd.). The quick exhaust valve 12 can play a role in accelerating the exhaust of the air chamber of the oil filling bottom valve, so that the oil filling bottom valve is closed at a higher speed.
When the oil tank is not filled with the oil float 3-1 and is in a sinking position, the valve core is in an opening state enabling the air inlet P to be communicated with the air outlet A in a linkage mode, the air control bottom valve switch 4 is in an opening ventilation state capable of being controlled, once ventilation is opened, the oil filling bottom valve 2 is opened under the action of air pressure, and oil is allowed to be loaded. When the oil tank is filled with the oil float 3-1 and is positioned at a floating position, the valve core is linked to be in a stop state which enables the air inlet P and the air outlet A to be blocked, the air control bottom valve switch 4 is reset to be in an air closing and cutting-off state, the oil filling bottom valve 2 automatically resets and closes after air pressure is lost, oil loading is stopped continuously, and oil in the oil tank is prevented from flowing back.
Referring to fig. 2, the bottom of the buoy 3-1 is provided with a bellows type test air cavity 3-2 which can expand vertically and stretch elastically. The testing air cavity 3-2 is connected with an air source G and an air inlet P of the high liquid level switch 3 through a three-way 11 branch after passing through a testing port 3-3 positioned on the high liquid level switch 3 and a two-position three-way manual control valve 8 (certainly, the on-off control device can be of other modes) serving as an on-off control piece, the first two-position three-way air control valve 7 is provided with an air pressure driving on position and a pressure relief resetting position, and an air outlet A of the high liquid level switch 3 is also communicated with the air pressure driving air inlet of the first two-position three-way air control valve through a built-in quick exhaust valve 9 and a branch of a four-way valve 10. The four-way junction 10 is also connected to a high level indicator.
When the fuelling vehicle is not fully loaded, a high liquid level test is carried out, a gas source G switch is opened to enable high-pressure gas to enter from a port P and exit from a port A of a high liquid level switch 3 and lead to a pneumatic driving gas inlet of a first two-position three-way pneumatic control valve 7, so that the valve is in a connection position; then, the two-position three-way manual control valve 8 is controlled to be communicated with an air source air path, so that high-pressure air is led to a test port of the high liquid level switch 3; under normal conditions, the test air cavity 3-2 expands, the buoy 3-1 floats, the valve core of the high liquid level switch 2 blocks the air inlet P and the air outlet A, so that the air pressure of the first two-position three-way pneumatic control valve 7 drives the air inlet to cut off air, the first two-position three-way pneumatic control valve 7 resets to cut off the air circuit, and the continuous air transmission of the test air cavity 3-2 is cut off. As a result, the float bowl 3-1 sinks and resets under the action of gravity, the test air cavity 3-2 leaks air, the valve core is switched to the opening state that the air inlet P is communicated with the air outlet A, the P, A port of the high liquid level switch 3 is communicated again, the processes are repeated, the float bowl 3-1 is lifted in a reciprocating mode until the test observation is completed, the two-position three-way manual control valve 8 is controlled to block the air source air circuit, and the test is stopped.
The above-mentioned process of this embodiment has utilized high liquid level switch's self atmospheric pressure feedback ingeniously, has realized the timely cutting off of test mouthful gaseous, consequently has effectively high-pressure gas's continuous input, has guaranteed to test the intact of air cavity when carrying out the high liquid level test of flotation pontoon with the help of the facial make-up air supply.
Example two
The high liquid level testing system of the refueling truck of the embodiment is shown in fig. 4, and the basic structure is the same as that of the first embodiment. The difference lies in that: the on-off control part is not a simple two-position three-way manual control valve 8, but is formed by combining a second two-position three-way air control valve 8 'and an on-off control valve 8' (a two-position three-way manual control valve or other on-off control devices can be adopted), an air source G is communicated with an air pressure driving air inlet of the second two-position three-way air control valve 8 'through the on-off control valve 8', the second two-position three-way air control valve 8 'is provided with a branch passage position for connecting the air source G and an air inlet P of the high liquid level switch 3 through a branch of a four-way valve 11', and a tank connecting position for connecting the oil.
When refueling, open the facial make-up air supply, the flotation pontoon will be in the position of sinking, the air supply advances through P mouth, A mouthful goes out, control first two position three-way valve 7 is in the switch-on position, control the air supply of second two three-way air control valve 8' air pressure drive air inlet of switch-on/off control valve 8 "control disconnection this moment, make it be in the logical jar position of switch-on oil tank 1, can make jar interior and test air cavity intercommunication, keep pressure balance between them, the inflation can not appear in the test air cavity among the operation process of refueling to guarantee aircraft tank service truck normally refuel and oil charging.
When the buoy needs to be tested, the on-off control valve 8 'is controlled to control the air source G to be communicated with the air pressure driving air inlet of the second two-position three-way air control valve 8', the second two-position three-way air control valve 8 'can be switched to the branch passage position to block the through tank, then operation observation similar to the embodiment is carried out until the on-off control valve 8' is controlled to block the air source air passage, the test is stopped, the test of the buoy can be completed, and the damage of a test air cavity is effectively avoided.
Experiments show that the test air cavity is simple and convenient to control in the embodiment, the nondestructive test air cavity is ensured when the buoy high liquid level test is completed by means of the upper high-pressure air source, and the problem of expansion of the test air cavity due to negative pressure is effectively solved, so that the refueling and oil filling of the aircraft refueling truck are ensured.
Claims (4)
1. A high liquid level test system of a refueling truck comprises an oil filling bottom valve (2) and a refueling bottom valve (5) which are arranged at the bottom of an oil tank (1), and a high liquid level switch (3) and a breather valve (6) which are arranged at the top of the oil tank; the high liquid level switch is externally provided with an air inlet (P) and an air outlet (A), and is internally provided with a valve core linked with the bottom float bowl (3-1); when the float bowl is in a sinking position, the valve core is in an opening state which enables the air inlet to be communicated with the air outlet; when the buoy is in a floating position, the valve core is in a cut-off state which enables the air inlet and the air outlet to be blocked; the air outlet is communicated with an air control bottom valve switch (4) for controlling the oil filling bottom valve and an air pressure driving air inlet of the air control bottom valve, and the oil filling bottom valve is provided with a controlled opening state corresponding to the ventilation state of the air control bottom valve switch and a reset closing state corresponding to the air-off reset state of the air control bottom valve switch; the bottom of the buoy is provided with a test air cavity (3-2) which can expand vertically and stretch elastically; the method is characterized in that:
the test air cavity is branched to be connected with an air source (G) and an air inlet of the high liquid level switch through a test port through a first two-position three-way air control valve (7) and an on-off control piece, the first two-position three-way air control valve is provided with an air pressure drive on position and a pressure relief resetting position, and an air outlet of the high liquid level switch is further branched to be communicated with the air pressure drive air inlet of the first two-position three-way air control valve.
2. The refueling vehicle high liquid level testing system as claimed in claim 1, wherein: the on-off control piece is formed by combining a second two-position three-way pneumatic control valve and the on-off control valve, the air source is communicated with an air pressure driving air inlet of the second two-position three-way pneumatic control valve through the on-off control valve, and the second two-position three-way pneumatic control valve is provided with a branch passage position for communicating the air source with the air inlet of the high liquid level switch in a pneumatic driving branch manner and a tank communicating position for communicating the oil tank in a pressure relief reset manner.
3. The refueling vehicle high liquid level testing system as claimed in claim 2, wherein: and a quick exhaust valve is arranged between the air control bottom valve switch and the oil filling bottom valve.
4. The refueling vehicle high liquid level testing system according to claim 3, characterized in that: and the air outlet of the high liquid level switch is communicated with the air pressure driving air inlet of the first two-position three-way pneumatic control valve through a built-in quick exhaust valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920942543.3U CN210417787U (en) | 2019-06-21 | 2019-06-21 | High liquid level test system of refueling vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920942543.3U CN210417787U (en) | 2019-06-21 | 2019-06-21 | High liquid level test system of refueling vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN210417787U true CN210417787U (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920942543.3U Withdrawn - After Issue CN210417787U (en) | 2019-06-21 | 2019-06-21 | High liquid level test system of refueling vehicle |
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| Country | Link |
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| CN (1) | CN210417787U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110217505A (en) * | 2019-06-21 | 2019-09-10 | 航天晨光股份有限公司 | A kind of tank service truck high liquid level test macro |
-
2019
- 2019-06-21 CN CN201920942543.3U patent/CN210417787U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110217505A (en) * | 2019-06-21 | 2019-09-10 | 航天晨光股份有限公司 | A kind of tank service truck high liquid level test macro |
| CN110217505B (en) * | 2019-06-21 | 2024-03-29 | 航天晨光股份有限公司 | High liquid level test system of refueling truck |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: CHONGQING CHUANQING TECHNOLOGY DEVELOPMENT Co.,Ltd. Assignor: AEROSUN Corp. Contract record no.: X2021980008689 Denomination of utility model: A high liquid level test system for refueling truck Granted publication date: 20200428 License type: Common License Record date: 20210902 |
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| EE01 | Entry into force of recordation of patent licensing contract | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200428 Effective date of abandoning: 20240329 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200428 Effective date of abandoning: 20240329 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |