CN114278860B - Control method capable of preventing leakage of liquefied gas cylinder and filling system - Google Patents
Control method capable of preventing leakage of liquefied gas cylinder and filling system Download PDFInfo
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- CN114278860B CN114278860B CN202210056402.8A CN202210056402A CN114278860B CN 114278860 B CN114278860 B CN 114278860B CN 202210056402 A CN202210056402 A CN 202210056402A CN 114278860 B CN114278860 B CN 114278860B
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Abstract
The invention discloses a control method and a filling system for filling a liquefied gas cylinder capable of preventing leakage, and aims to provide the control method and the system capable of realizing automatic alarm when a manual angle valve is not completely closed, so that leakage can be prevented. The control method comprises the following steps: collecting a detection pressure value of a pressure detection device, comparing the detection pressure value with a set pressure value, and separating the filling gun from the liquefied gas cylinder angle valve if the detection pressure value is smaller than the set pressure value; if the detected pressure value is larger than the set pressure value, the controller controls the alarm to output an alarm signal, and the alarm gives an alarm; and manually closing the liquefied gas cylinder angle valve, resetting the alarm output, separating the filling gun from the liquefied gas cylinder angle valve, and finishing filling of the gas cylinder. According to the method, when the self-closing manual angle valve of the liquefied gas cylinder is not completely closed, the filling gun does not fall off, and the gun falls off after the manual intervention is waited to close the manual angle valve, so that potential safety hazards are avoided, and the safety of filling, transporting and using of the liquefied gas is ensured.
Description
Technical Field
The invention relates to the technical field of liquefied gas filling, in particular to a control method and a filling system for filling a liquefied gas cylinder capable of preventing leakage.
Background
Because of the dangers of liquefied gas in the use process, safe production is a primary problem in the production process in the liquefied petroleum gas field.
In order to ensure the use safety of the liquefied petroleum gas, a valve on the liquefied petroleum gas cylinder adopts a self-closing manual angle valve. In the filling process of the liquefied petroleum gas cylinder, in order to improve production efficiency, automatic filling assembly line operation is adopted, and the diagonal valve is opened or closed by clockwise and anticlockwise rotation of an automatic angle valve opening and closing device. However, it is often not possible to close completely due to problems with the angle between the automatic angle valve switch and the angle valve or the angle valve itself. Because the automatic gun-releasing self-closing valve is a self-closing type manual angle valve, the automatic gun-releasing self-closing valve is partially closed after filling, and the fact that the manual angle valve is not fully closed is difficult to find. During transportation, when an external force acts on the self-closing valve portion, the self-closing valve is caused to open, thereby causing leakage of liquefied gas. If the liquefied gas reaches the user, the liquefied gas can be rapidly sprayed out due to the pressure effect in the gas cylinder when the connecting device is connected with the self-closing angle valve in the use process of the user, so that potential safety hazards exist.
In addition, during the use of the filling gun, the phenomena of loosening, falling off, damage of a sealing ring and the like of the internal threaded joint and the sleeve piston can be generated, so that liquefied petroleum gas flows back to the front air chamber to be mixed with compressed air, and if the liquefied petroleum gas cannot be found in time, serious potential safety hazards can be caused.
Disclosure of Invention
The invention aims at solving the technical defects in the prior art, and provides a control method for filling a liquefied gas cylinder, which can realize automatic alarm when a manual angle valve is not completely closed, so that leakage can be prevented.
It is another object of the present invention to provide a filling system that can achieve an automatic alarm when the manual angle valve is not fully closed.
The technical scheme adopted for realizing the purpose of the invention is as follows:
the control method capable of preventing leakage of the liquefied gas cylinder comprises the following steps that a pressure detection device is arranged on a pipeline between a filling stop valve and a filling gun, the output end of the pressure detection device is connected with the pressure input end of a controller, and the alarm signal output end of the controller is connected with an alarm, wherein the control method comprises the following steps:
(1) When the filling is carried out to a set weight value, the filling stop valve is closed to stop filling;
(2) The automatic angle valve switch closes the liquefied gas cylinder angle valve and then is separated from the liquefied gas cylinder angle valve;
(3) And (3) recovering residual gas: the recovery stop valve is opened, the recovery pump is started, and residual air pressure is returned to the filling main pipeline;
(4) When the set recovery time is reached, the recovery stop valve is closed, and the recovery pump stops working;
(5) Collecting a detection pressure value of the pressure detection device, comparing the detection pressure value with a set pressure value, and if the detection pressure value is smaller than the set pressure value, separating the filling gun from the liquefied gas cylinder angle valve, closing a filling one-way valve in the filling gun, and finishing filling of the gas cylinder; if the detected pressure value is larger than the set pressure value, the controller outputs an alarm signal, and the alarm gives an alarm; and manually closing the liquefied gas cylinder angle valve, resetting alarm output, separating the filling gun from the liquefied gas cylinder angle valve, closing the filling one-way valve in the filling gun, and finishing filling of the gas cylinder.
A quick-release valve is arranged on a compressed air front air inlet pipeline of the filling gun, and an inlet of the quick-release valve is connected with a front air inlet of the filling gun through the compressed air front air inlet pipeline; when the liquid overflows from the quick-release valve, the used filling gun is judged to be faulty, and the filling operation is stopped.
The pressure detection device is an electronic digital display pressure gauge.
The alarm is an audible and visual alarm or a warning lamp alarm.
The filling system for realizing the control method comprises an electronic weighing device, an automatic angle valve switch lifting mechanism, a filling gun, a telescopic balancer, a filling branch, a recovery branch and a controller, and also comprises a pressure detection device and an alarm, wherein the telescopic balancer, the filling branch, the recovery branch and the controller are arranged on a hanging bracket; the filling branch comprises the filling stop valve, one end of the filling stop valve is connected with the third port of the first three-way joint, and the other end of the filling stop valve is connected with the third port of the second three-way joint through a gas pipe; the recovery branch comprises a recovery pump, a recovery stop valve, a first one-way valve and a second one-way valve, one end of the recovery stop valve is connected with a first interface of the first three-way joint, the other end of the recovery stop valve is connected with an inlet of a recovery cavity of the recovery pump through the first one-way valve, an outlet of the recovery cavity is connected with a second interface of the second three-way joint through the second one-way valve, and the first interface of the second three-way joint is connected with a filling main pipeline through a two-way valve; the second connector of the first three-way joint is connected with the liquefied gas inlet of the filling gun through a pipeline; the pipeline between the filling stop valve and the filling gun is provided with the pressure detection device, the output end of the pressure detection device is connected with the pressure input end of the controller, and the alarm signal output end of the controller is connected with the alarm.
A quick-discharge valve is arranged on a compressed air front inlet pipeline of the filling gun, and an inlet of the quick-discharge valve is connected with a front air inlet of the filling gun through the compressed air front inlet pipeline.
The controller is respectively connected with the electronic weighing device, the automatic angle valve switch lifting mechanism, the balancer, the filling stop valve, the recovery stop valve and the recovery pump, and controls the cooperative action among the electronic weighing device, the automatic angle valve switch lifting mechanism, the balancer, the filling stop valve, the recovery stop valve and the recovery pump.
Compared with the prior art, the invention has the beneficial effects that:
1. the control method can realize automatic alarm when the manual angle valve is not completely closed, thereby preventing leakage, guaranteeing the safety of liquefied petroleum gas production and use, reducing the labor intensity of workers and improving the production efficiency.
2. According to the control method disclosed by the invention, the quick-release valve is arranged on the air inlet pipeline before compressed air, and when liquid overflows from the quick-release valve, the filling operation is stopped, so that potential safety hazards are avoided, and the smooth production is ensured.
3. The filling system can realize automatic alarm when the manual angle valve is not completely closed, thereby preventing leakage and guaranteeing the safety of liquefied petroleum gas production and use.
Drawings
Fig. 1 shows a schematic diagram of the filling system of the present invention.
Detailed Description
The invention will be described in detail below with reference to the drawings and the specific embodiments.
The schematic diagram of the filling system of the invention is shown in fig. 1, and the filling system comprises an electronic weighing device 1, a gas cylinder fixture 2, an automatic angle valve switch 4, an automatic angle valve switch lifting mechanism 5, a filling gun 8, a telescopic balancer 7 arranged on a hanging frame, a filling branch, a recycling branch and a controller, wherein the electronic weighing device 1, the gas cylinder fixture 2, the automatic angle valve switch 4, the automatic angle valve switch lifting mechanism 5, the filling gun 8 and the telescopic balancer 7 arranged on the hanging frame adopt the structure of the prior art. In order to prevent leakage caused by incomplete closing of the corner valve of the liquefied gas cylinder, a pressure detection device 9 and an alarm are also included. The filling branch comprises a filling stop valve 10, one end of the filling stop valve 10 is connected with a third port of a first three-way joint 11, and the other end of the filling stop valve 10 is connected with a third port of a second three-way joint 16 through a gas pipe 19. The recycling branch comprises a recycling pump 14, a recycling stop valve 12, a first one-way valve 13 and a second one-way valve 15, one end of the recycling stop valve 12 is connected with a first interface of the first three-way joint 11, the other end of the recycling stop valve 12 is connected with a recycling cavity inlet of the recycling pump 14 through the first one-way valve 13, an outlet of the recycling cavity is connected with a second interface of the second three-way joint 16 through the second one-way valve 15, and a first interface of the second three-way joint 16 is connected with a filling main pipeline 18 through a two-way valve 17. The second port of the first three-way joint 12 is connected with the liquefied gas inlet of the filling gun 8 through a pipeline 20. A pressure detection device 9 is arranged on a pipeline 20 between the filling stop valve 10 and the filling gun 8, the output end of the pressure detection device 9 is connected with the pressure input end of a controller, and the alarm signal output end of the controller is connected with an alarm. In order to realize automatic control, the controller is respectively connected with the electronic weighing device 1, the automatic angle valve switch 4, the automatic angle valve switch lifting mechanism 5, the balancer 7, the filling stop valve 10, the recovery stop valve 12 and the recovery pump 14, and controls the cooperative action among the electronic weighing device 1, the automatic angle valve switch 4, the automatic angle valve switch lifting mechanism 5, the balancer 7, the filling stop valve 10, the recovery stop valve 12 and the recovery pump 14.
In order to facilitate checking the pressure value, the pressure detection device 9 may be an electronic digital display pressure gauge.
The alarm can be an audible and visual alarm or a warning lamp alarm.
In order to ensure the normal use of the filling gun in the filling process, a quick-release valve is arranged on a compressed air front inlet pipeline of the filling gun 8, and an inlet of the quick-release valve is connected with a front air inlet of the filling gun through the compressed air front inlet pipeline. In the use, if the internal thread joint inside the filling rifle has the phenomenon such as becoming flexible, drop and sealing washer damage with the sleeve piston, liquefied petroleum gas will flow back to preceding air chamber, and the liquefied petroleum gas in the preceding air chamber gets into the quick relief valve of intake pipe route before the compressed air through preceding air inlet and overflows fast, when quick relief valve has liquid to overflow, alerts operating personnel that this filling rifle breaks down, should in time stop using and troubleshoot.
In the control method for filling the liquefied gas cylinder capable of preventing leakage, the steps from the start of filling to the set weight can be performed by adopting the method in the prior art, and the innovation point of the invention is that the control method is used after the liquefied gas cylinder is filled. The following describes the filling control method of the present invention in detail by taking the filling system shown in fig. 1 as an example.
The filling control method of the invention comprises the following steps:
(1) The gas cylinder 3 is placed on the electronic weighing device 1, and the gas cylinder 3 is fixed through the gas cylinder fixture 2. The filling gun 8 is hung on the gun rack through a hanging ring screw by a rope on the telescopic balancer 7. The filling gun 8 is aligned to the valve port of the liquefied gas cylinder angle valve 6 for clamping, and meanwhile, a filling one-way valve in the filling gun is opened;
(2) The automatic angle valve switch 4 descends under the control of the automatic angle valve switch lifting mechanism 5 and opens the angle valve 6 of the liquefied gas cylinder;
(3) The controller controls the filling stop valve 10 to be opened, and liquefied gas sequentially enters the gas cylinder 3 through the filling main pipeline 18, the two-way valve 17, the first interface and the third interface of the second three-way joint 16, the gas pipe 19, the filling stop valve 10, the third interface and the second interface of the first three-way joint 11, the pipeline 20 and the filling gun 8 for filling the liquefied gas;
(4) When the filling is carried out to a set weight value, the electronic weighing device 1 sends a signal to a controller, and the controller controls the filling stop valve 10 to close so as to stop filling;
(5) The controller controls the automatic angle valve switch 4 to close the liquefied gas cylinder angle valve 6, and then the automatic angle valve switch lifting mechanism 5 drives the automatic angle valve switch 4 to lift back, and the automatic angle valve switch 4 is separated from the liquefied gas cylinder angle valve 6;
(6) The controller controls the recovery stop valve 12 to be opened, the recovery pump 14 is started, residual air is sucked into the recovery cavity through the first one-way valve 13 under the state that the piston of the recovery pump ZB05 reciprocates, and the residual air entering the recovery cavity is pressed back to the canning main pipeline 18 through the second one-way valve 15, the second interface and the first interface of the second three-way joint 16 and the two-way valve 17;
(7) In this embodiment, the recovery time is set to 5 seconds, and the controller controls to close the recovery stop valve 12 after the set recovery time is reached, and at the same time, the recovery pump 14 stops working;
(8) The controller collects the detected pressure value of the pressure detection device 9 and compares the detected pressure value with a set pressure value, if the detected pressure value is smaller than the set pressure value, the balancer 7 acts to drive the filling gun 8 to be separated from the liquefied gas cylinder angle valve 6, and meanwhile the filling check valve in the filling gun 8 is closed to finish filling of a gas cylinder; and if the detected pressure value is larger than the set pressure value, the controller outputs an alarm signal, and the alarm gives an alarm. When an operator sees the alarm to alarm, the liquefied gas cylinder angle valve 6 is manually closed, a reset button on the controller is reset for alarm output, then the controller controls the telescopic balancer 7 to act, the filling gun 8 is separated from the liquefied gas cylinder angle valve 6, and meanwhile, the filling check valve in the filling gun is closed, so that the filling of one gas cylinder is completed.
And continuously repeating the steps to finish filling the gas cylinders one by one.
In the filling control method and the filling system, the pressure detection device and the alarm are arranged on the pipeline between the filling stop valve and the filling gun, when the manual angle valve of the self-closing manual angle valve of the liquefied gas cylinder is not completely closed after the set recovery time is reached, the alarm alarms when the pressure in the pipeline from the closing point to the filling stop valve exceeds the set value, the filling gun does not fall off at the moment, and the gun is removed after the manual intervention is waited to close the manual angle valve, so that the potential safety hazard is avoided, and the safety of filling, transportation and use of the liquefied gas is ensured.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (7)
1. The control method capable of preventing leakage of the liquefied gas cylinder is characterized in that a pressure detection device is arranged on a pipeline between a filling stop valve and a filling gun, the output end of the pressure detection device is connected with the pressure input end of a controller, and the alarm signal output end of the controller is connected with an alarm, and the control method comprises the following steps:
(1) When the filling is carried out to a set weight value, the filling stop valve is closed to stop filling;
(2) The automatic angle valve switch closes the liquefied gas cylinder angle valve and then is separated from the liquefied gas cylinder angle valve;
(3) And (3) recovering residual gas: the recovery stop valve is opened, the recovery pump is started, and residual air pressure is returned to the filling main pipeline;
(4) When the set recovery time is reached, the recovery stop valve is closed, and the recovery pump stops working;
(5) Collecting a detection pressure value of the pressure detection device, comparing the detection pressure value with a set pressure value, and if the detection pressure value is smaller than the set pressure value, separating the filling gun from the liquefied gas cylinder angle valve, closing a filling one-way valve in the filling gun, and finishing filling of the gas cylinder; if the detected pressure value is larger than the set pressure value, the controller outputs an alarm signal, and the alarm gives an alarm; and manually closing the liquefied gas cylinder angle valve, resetting alarm output, separating the filling gun from the liquefied gas cylinder angle valve, closing the filling one-way valve in the filling gun, and finishing filling of the gas cylinder.
2. The method for controlling the filling of the liquefied gas cylinder capable of preventing leakage according to claim 1, wherein a quick-release valve is installed on a compressed air front inlet pipeline of the filling gun, and an inlet of the quick-release valve is connected with a front air inlet of the filling gun through the compressed air front inlet pipeline; when the liquid overflows from the quick-release valve, the used filling gun is judged to be faulty, and the filling operation is stopped.
3. The method for controlling the filling of the liquefied gas cylinder capable of preventing leakage according to claim 1 or 2, wherein the pressure detection device is an electronic digital display pressure gauge.
4. A method of controlling filling of a liquid gas cylinder capable of preventing leakage according to claim 3, wherein the alarm is an audible and visual alarm or a warning light alarm.
5. A filling system for realizing the control method of claim 1, comprising an electronic weighing device, an automatic angle valve switch lifting mechanism, a filling gun, a telescopic balancer arranged on a hanging bracket, a filling branch, a recovery branch and a controller, and is characterized by further comprising a pressure detection device and an alarm; the filling branch comprises the filling stop valve, one end of the filling stop valve is connected with the third port of the first three-way joint, and the other end of the filling stop valve is connected with the third port of the second three-way joint through a gas pipe; the recovery branch comprises a recovery pump, a recovery stop valve, a first one-way valve and a second one-way valve, one end of the recovery stop valve is connected with a first interface of the first three-way joint, the other end of the recovery stop valve is connected with an inlet of a recovery cavity of the recovery pump through the first one-way valve, an outlet of the recovery cavity is connected with a second interface of the second three-way joint through the second one-way valve, and the first interface of the second three-way joint is connected with a filling main pipeline through a two-way valve; the second connector of the first three-way joint is connected with the liquefied gas inlet of the filling gun through a pipeline; the pipeline between the filling stop valve and the filling gun is provided with the pressure detection device, the output end of the pressure detection device is connected with the pressure input end of the controller, and the alarm signal output end of the controller is connected with the alarm.
6. The filling system of claim 5, wherein a quick drain valve is mounted on a compressed air front inlet line of the filling gun, an inlet of the quick drain valve being connected to a front air inlet of the filling gun through the compressed air front inlet line.
7. The filling system of claim 5, wherein the controller is coupled to the electronic weighing device, the automatic corner valve switch lift mechanism, the balancer, the filling stop valve, the recovery stop valve, and the recovery pump, respectively, and controls a coordinated operation among the electronic weighing device, the automatic corner valve switch lift mechanism, the balancer, the filling stop valve, the recovery stop valve, and the recovery pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210056402.8A CN114278860B (en) | 2022-01-18 | 2022-01-18 | Control method capable of preventing leakage of liquefied gas cylinder and filling system |
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| CN202210056402.8A CN114278860B (en) | 2022-01-18 | 2022-01-18 | Control method capable of preventing leakage of liquefied gas cylinder and filling system |
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| CN114278860A CN114278860A (en) | 2022-04-05 |
| CN114278860B true CN114278860B (en) | 2023-10-13 |
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| DE19847786A1 (en) * | 1998-10-16 | 2000-04-20 | Degussa | Device and method for filling and emptying a container charged with flammable and aggressive gas |
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| CN114278860A (en) | 2022-04-05 |
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