CN112524488A - Method and system for quickly unloading automobile tank car - Google Patents
Method and system for quickly unloading automobile tank car Download PDFInfo
- Publication number
- CN112524488A CN112524488A CN202011432590.7A CN202011432590A CN112524488A CN 112524488 A CN112524488 A CN 112524488A CN 202011432590 A CN202011432590 A CN 202011432590A CN 112524488 A CN112524488 A CN 112524488A
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- unloading
- branch
- pump
- tank car
- valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/14—Conveying liquids or viscous products by pumping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
The invention relates to a quick unloading method and a quick unloading system for an automobile tank car. The beneficial effects are as follows: the unloading pump is connected with a plurality of parallel unloading branches to realize the simultaneous unloading of a plurality of tank cars, the liquid level interlocking signals on each unloading branch automatically control the unloading process, the unloading personnel are reduced, the labor cost is saved, the labor intensity of the operating personnel is greatly reduced, and the unloading efficiency is improved.
Description
Technical Field
The invention relates to the technical field of chemical oil storage and transportation, in particular to a quick unloading method and a quick unloading system for an automobile tank car.
Background
At present, the conventional tank car unloading method for transporting chemical oil products by the existing automobile tank car mainly comprises two methods: one is that the oil in the tank car flows into the buffer tank by self-flow, and then is conveyed into the storage tank by the pump; the other is that the tank wagon is connected with a pump through a unloading arm and a pipeline, and the tank wagon is directly pumped into a storage tank by the pump. The first method is limited by the size of the buried buffer tank, the number of unloading positions is small, the unloading efficiency is low, the method is only suitable for the unloading operation of a small number of tank cars, the buffer tank is relatively expensive in manufacturing cost, the later maintenance of equipment is difficult, and the buffer tank is not suitable for large-scale arrangement; the second method requires two people to collaborate to accomplish the unloading task: one person is responsible for starting the pump and begins to unload, another person is responsible for observing the interior liquid level change of tank wagon, send the signal of stopping the pump when oil is unloaded soon, the problem that exists is that the opportunity of stopping the pump is influenced by the people greatly, it is difficult to master, it is too early to stop the pump, the residual oil pump of tank wagon bottom is not clean, it is too late to stop the pump, the pump of unloading is again emptied easily, so frequent operation, it is great to the pump damage of unloading, can cause the pump to damage very fast when serious, increase the cost of unloading, and this method will realize that many tank wagons unload simultaneously and need an unloading parking stall to correspond an unloading pump, must operate more people, the cost of labor is great.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention solves the technical problem of providing a method and a system for quickly unloading the automobile tank wagon.
In order to achieve the purpose, the invention adopts the following technical scheme:
a quick unloading method for an automobile tank car comprises the following steps:
1) preparation before unloading: respectively connecting the tank car with an unloading crane pipe and a gas phase balance branch, and opening a stop valve on the gas phase balance branch, wherein at the moment, an electromagnetic valve on the unloading branch is in a closed state;
2) and (3) starting unloading: after a first tank car is prepared, opening an electromagnetic valve on an unloading branch of the first tank car, starting an unloading pump, and starting unloading of the first unloading branch; in the control system, the motor frequency of the unloading pump is the initial frequency F, and the unloading flow of the unloading branch is automatically controlled to be Q;
3) after other tank cars are prepared, the electromagnetic valves on other unloading branches are sequentially opened, and unloading is started corresponding to the unloading branches; in the control system, the unloading flow of each unloading branch is automatically controlled to be Q, the motor frequency of the unloading pump is automatically interlocked with the number of the solenoid valves on the unloading branch, namely, when one solenoid valve is opened, the motor of the unloading pump increases the frequency by a certain proportion until the frequency is increased to 100%;
4) during unloading, the liquid level of the tank car is continuously reduced, and when the liquid level meter displays that the liquid level of the tank car is reduced to a lower limit HLWhen the tank car is empty, an instruction is sent to a flowmeter to control a small electromagnetic valve to enable the flow of a throttle valve to be 0.1-0.3 times of a normal value, so that the tank car is prevented from being empty; when the liquid level meter displays that the liquid level of the tank car is reduced to a low limit HLLWhen the unloading branch is used, an instruction is sent to the flowmeter to cut off the electromagnetic valve, and unloading is finished by the unloading branch; in the control system, every time one electromagnetic valve is closed, the motor of the unloading pump reduces the frequency by a certain proportion until the frequency is reduced to the starting frequency F;
5) after unloading, the tank car leaves the unloading parking place, and the emptied unloading crane pipe is used by the subsequent tank car;
6) and 4) continuously unloading according to the steps 1) to 4), and stopping the unloading pump until the last tank car is unloaded.
A quick unloading system for a car tank wagon comprises an unloading pump, an unloading oil filling pipe, a storage tank, a liquid level meter, a flow meter, an adjusting valve, an electromagnetic valve, an unloading pipe, a gas phase balance pipe and a stop valve, and is characterized in that the unloading oil filling pipe, the electromagnetic valve and the adjusting valve are sequentially connected through a pipeline, the flow meter and the adjusting valve are arranged on a connecting pipeline between the electromagnetic valve and the adjusting valve for linkage control, the liquid level meter and the electromagnetic valve are arranged on the connecting pipeline between the unloading oil filling pipe and the electromagnetic valve for linkage control, and the liquid level meter and the flow meter are in linkage control to form an unloading branch; the inlet end of the unloading pump is connected with a plurality of unloading branches in parallel, and the outlet end of the unloading pump is connected with the storage tank through an unloading pipe; the cut-off valve and the unloading branch are matched and arranged in parallel and are connected through a pipeline to form a gas phase balance branch; one end of the gas phase balance pipe is connected with a plurality of gas phase balance branches in parallel, and the other end of the gas phase balance pipe is connected with the top of the storage tank.
The driving motor of the unloading pump is a variable frequency motor, and the frequency of the motor is automatically interlocked with the number of the solenoid valves on the unloading branch.
Compared with the prior art, the invention has the beneficial effects that:
1) the unloading of a plurality of tank cars is realized simultaneously, the automatic control degree is high, after the tank cars on the unloading branch are unloaded with oil, the electromagnetic valve is interlocked and cut off, the unloading oil filling riser is disconnected only, the emptied oil filling riser is connected with the subsequent tank car, and the electromagnetic valve is opened, so that the unloading can be continued without repeatedly starting and stopping the pump, the labor intensity of operators is greatly reduced, and the unloading efficiency is improved;
2) each unloading branch is provided with a liquid level meter for monitoring the liquid level of the corresponding tank car, and when the liquid level is reduced to a low limit HLTriggering automatic interlocking action, reducing unloading flow of corresponding branch, and lowering liquid level to lower limit HLLWhen the unloading pump is used, the electromagnetic valves on the corresponding branches are cut off in an interlocking manner, so that the unloading pump is prevented from being emptied, and the function of protecting the pump is achieved;
3) a plurality of unloading oil filling pipes share one unloading pump, a driving motor is variable frequency, the motor frequency is automatically interlocked with the total opening number of the electromagnetic valves on the branch, namely, the more the total opening number of the electromagnetic valves is, the higher the motor frequency is, the larger the conveying flow of the unloading pump is, the less the total opening number of the electromagnetic valves is, the lower the motor frequency is, the smaller the conveying flow of the unloading pump is, and the energy consumption is saved.
Drawings
FIG. 1 is a schematic diagram of the structural principle of the present invention;
FIG. 2 is a schematic view of the tank car level display principle of the present invention.
In the figure: 1-tank car 2-unloading pump 3-unloading crane pipe 4-storage tank 5-liquid level meter 6-flowmeter 7-regulating valve 8-electromagnetic valve 9-unloading pipe 10-gas phase balance pipe 11-cut-off valve
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings:
as shown in fig. 1 and 2, the rapid unloading system for the automobile tank wagon comprises an unloading pump 2, an unloading arm 3, a storage tank 4, a liquid level meter 5, a flow meter 6, a regulating valve 7, an electromagnetic valve 8, an unloading pipe 9, a gas phase balance pipe 10 and a cut-off valve 11, wherein the unloading arm 3, the electromagnetic valve 8 and the regulating valve 7 are sequentially connected through a pipeline, the flow meter 6 and the regulating valve 7 are arranged on a connecting pipeline between the electromagnetic valve 8 and the regulating valve 7 for linkage control, the liquid level meter 6 and the electromagnetic valve 8 are arranged on the connecting pipeline between the unloading arm 3 and the electromagnetic valve 8 for linkage control, and the liquid level meter 5 and the flow meter 6 are in linkage control (automatic unloading flow control) to form an unloading branch; the inlet end of the unloading pump 2 is connected with a plurality of unloading branches in parallel, and the outlet end of the unloading pump is connected with the storage tank 4 through an unloading pipe 9; the cut-off valve 11 is matched with the unloading branch and arranged in parallel, and is connected through a pipeline to form a gas phase balance branch; one end of the gas phase balance pipe 10 is connected with a plurality of gas phase balance branches in parallel, and the other end is connected with the top of the storage tank 4.
The maximum delivery flow of the unloading pump 2 is equal to the sum of the unloading flows of each unloading branch, the driving motor of the unloading pump 2 is a variable frequency motor, the motor frequency is automatically interlocked with the number of the electromagnetic valves 8 opened on the unloading branch, namely, the total number of the electromagnetic valves 8 opened is more, the motor frequency of the unloading pump 2 is higher, and the delivery flow of the unloading pump 2 is larger.
Each unloading branch is provided with a liquid level meter 5 and an electromagnetic valve 8, the signal of the liquid level meter 5 is automatically interlocked with a flow meter 6 and the electromagnetic valve 8 (see figure 2), namely, the liquid level of the tank car 1 is reduced to a low limit HLThe automatic interlocking action is triggered, the unloading flow of the corresponding branch is reduced, and the liquid level is reduced to the lower limit HLLWhen the control is in operation, the electromagnetic valve 8 on the corresponding branch is interlocked and cut off.
The quick unloading system of the automobile tank car comprises the following working principles:
1) preparation before unloading: respectively connecting the tank car 1 with the unloading crane pipe 3 and the stop valve 11 on the gas phase balance branch, and opening the stop valve 11 on the gas phase balance branch, wherein at the moment, the electromagnetic valve 8 on the unloading branch is in a closed state;
2) and (3) starting unloading: after a first tank car is prepared, opening the electromagnetic valve 8 on the unloading branch of the first tank car 1, starting the unloading pump 2, and starting unloading of the first unloading branch; in the control system, the motor frequency of the unloading pump 2 is the initial frequency F, and the unloading flow of the unloading branch is automatically controlled to be Q;
3) after other tank cars are prepared, the electromagnetic valves on other unloading branches are sequentially opened, and unloading is started corresponding to the unloading branches; in the control system, the unloading flow of each unloading branch is automatically controlled to be Q, the frequency of the motor of the unloading pump 2 is automatically interlocked with the number of the opened electromagnetic valves 8 on the unloading branches, namely, the motor of the unloading pump 2 increases the frequency in a certain proportion when one electromagnetic valve 8 is opened until the frequency is increased to 100%;
4) during unloading, the liquid level of the tank wagon 1 is continuously reduced, and when the liquid level meter 5 displays that the liquid level of the tank wagon 1 is reduced to a low limit HLWhen the tank car is empty, an instruction is sent to the flowmeter 6 to control the small electromagnetic valve 8 to be closed, so that the flow of the throttle valve 7 is 0.1-0.3 times of the normal value, and the tank car 1 is prevented from being empty; when the liquid level meter 5 displays that the liquid level of the tank car 1 is reduced to the low limit HLLWhen the unloading branch finishes unloading, an instruction is sent to the flowmeter 6 to cut off the electromagnetic valve 8; in the control system, each time one of the solenoid valves 8 is closed, the motor of the unloading pump 2 reduces the frequency by a certain proportion until the frequency is reduced to the starting frequency F;
5) after unloading, the tank wagon 1 leaves the unloading position, and the emptied unloading crane pipe 3 is used by the subsequent tank wagon 1;
6) and 4) continuously unloading according to the steps 1) to 4) until the last tank car 1 is unloaded, and stopping the unloading pump.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (3)
1. A quick unloading method for an automobile tank car is characterized by comprising the following steps:
1) preparation before unloading: respectively connecting the tank car with an unloading crane pipe and a gas phase balance branch, and opening a stop valve on the gas phase balance branch, wherein at the moment, an electromagnetic valve on the unloading branch is in a closed state;
2) and (3) starting unloading: opening an electromagnetic valve on the unloading branch of the first tank car, starting an unloading pump, and starting unloading by the first unloading branch; at the moment, the motor frequency of the unloading pump is the initial frequency F, and the unloading flow of the unloading branch is automatically controlled to be Q;
3) sequentially opening the electromagnetic valves on other unloading branches, and starting unloading corresponding to the unloading branches; the unloading flow of each unloading branch is automatically controlled to be Q, the motor frequency of the unloading pump is automatically interlocked with the number of the solenoid valves on the unloading branch, namely, when one solenoid valve is opened, the motor of the unloading pump increases the frequency in a certain proportion until the frequency is increased to 100%;
4) when the liquid level meter displays that the liquid level of the tank car falls to a lower limit HLWhen the flow is detected, an instruction is sent to a flowmeter to control a small electromagnetic valve to enable the flow of the throttle valve to be 0.1-0.3 times of a normal value; when the liquid level meter displays that the liquid level of the tank car is reduced to a low limit HLLWhen the unloading branch is used, an instruction is sent to the flowmeter to cut off the electromagnetic valve, and unloading is finished by the unloading branch; when one electromagnetic valve is closed, the motor of the unloading pump reduces the frequency by a certain proportion until the frequency is reduced to the starting frequency F;
5) after unloading, the tank car leaves the unloading parking place, and the emptied unloading crane pipe is used by the subsequent tank car;
6) and (4) continuously unloading according to the steps 1) to 4), and stopping the unloading pump until the last tank car is unloaded.
2. A rapid unloading system of a vehicle tank car for realizing the method of claim 1, which comprises an unloading pump, an unloading crane pipe, a storage tank, a liquid level meter, a flow meter, a regulating valve, a solenoid valve, an unloading pipe, a gas phase balance pipe and a stop valve, and is characterized in that the unloading crane pipe, the solenoid valve and the regulating valve are sequentially connected through a pipeline, the flow meter and the regulating valve are arranged on a connecting pipeline between the solenoid valve and the regulating valve for interlocking control, the liquid level meter and the solenoid valve are arranged on the connecting pipeline between the unloading crane pipe and the solenoid valve for interlocking control, and the liquid level meter and the flow meter are in interlocking control to form an unloading branch; the inlet end of the unloading pump is connected with a plurality of unloading branches in parallel, and the outlet end of the unloading pump is connected with the storage tank through an unloading pipe; the cut-off valve and the unloading branch are matched and arranged in parallel and are connected through a pipeline to form a gas phase balance branch; one end of the gas phase balance pipe is connected with a plurality of gas phase balance branches in parallel, and the other end of the gas phase balance pipe is connected with the top of the storage tank.
3. A rapid unloading system for a tank car according to the method of claim 1, wherein the driving motor of the unloading pump is a variable frequency motor, and the motor frequency is automatically interlocked with the number of solenoid valves on the unloading branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011432590.7A CN112524488A (en) | 2020-12-10 | 2020-12-10 | Method and system for quickly unloading automobile tank car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011432590.7A CN112524488A (en) | 2020-12-10 | 2020-12-10 | Method and system for quickly unloading automobile tank car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112524488A true CN112524488A (en) | 2021-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011432590.7A Withdrawn CN112524488A (en) | 2020-12-10 | 2020-12-10 | Method and system for quickly unloading automobile tank car |
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| Country | Link |
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| CN (1) | CN112524488A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114620668A (en) * | 2022-03-31 | 2022-06-14 | 山东京博物流股份有限公司 | Anti-blocking device and method for asphalt unloading pump pool |
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|---|---|---|---|---|
| CN205278783U (en) * | 2015-11-25 | 2016-06-01 | 中国天辰工程有限公司 | Car liquid tank vehicle bottom portion device of unloading |
| CN208732603U (en) * | 2018-08-08 | 2019-04-12 | 中化工储运有限公司 | A kind of liquid material automatic loading device |
| CN208791174U (en) * | 2018-08-30 | 2019-04-26 | 海南汉地阳光石油化工有限公司 | A kind of intelligence tank truck handling system |
| CN110030488A (en) * | 2019-04-30 | 2019-07-19 | 黄立亚 | A kind of transfusion system between LNG ship oceangoing ship and LNG tank case (or tank car) |
| CN110092343A (en) * | 2018-01-29 | 2019-08-06 | 中国石油天然气股份有限公司 | Sealed Unloading system and tank truck |
| US20200369507A1 (en) * | 2019-05-21 | 2020-11-26 | Sun Coast Resources.Inc. | Fuel control and distribution system and methods thereof |
-
2020
- 2020-12-10 CN CN202011432590.7A patent/CN112524488A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205278783U (en) * | 2015-11-25 | 2016-06-01 | 中国天辰工程有限公司 | Car liquid tank vehicle bottom portion device of unloading |
| CN110092343A (en) * | 2018-01-29 | 2019-08-06 | 中国石油天然气股份有限公司 | Sealed Unloading system and tank truck |
| CN208732603U (en) * | 2018-08-08 | 2019-04-12 | 中化工储运有限公司 | A kind of liquid material automatic loading device |
| CN208791174U (en) * | 2018-08-30 | 2019-04-26 | 海南汉地阳光石油化工有限公司 | A kind of intelligence tank truck handling system |
| CN110030488A (en) * | 2019-04-30 | 2019-07-19 | 黄立亚 | A kind of transfusion system between LNG ship oceangoing ship and LNG tank case (or tank car) |
| US20200369507A1 (en) * | 2019-05-21 | 2020-11-26 | Sun Coast Resources.Inc. | Fuel control and distribution system and methods thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114620668A (en) * | 2022-03-31 | 2022-06-14 | 山东京博物流股份有限公司 | Anti-blocking device and method for asphalt unloading pump pool |
| CN114620668B (en) * | 2022-03-31 | 2024-03-22 | 山东京博物流股份有限公司 | Asphalt unloading pump pool anti-blocking device and method |
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Application publication date: 20210319 |
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| WW01 | Invention patent application withdrawn after publication |