CN112082753A - Overcurrent performance testing device and method for emergency cut-off valve - Google Patents
Overcurrent performance testing device and method for emergency cut-off valve Download PDFInfo
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- CN112082753A CN112082753A CN201910506876.6A CN201910506876A CN112082753A CN 112082753 A CN112082753 A CN 112082753A CN 201910506876 A CN201910506876 A CN 201910506876A CN 112082753 A CN112082753 A CN 112082753A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The invention relates to the field of equipment testing, and discloses an overcurrent performance testing device and method for an emergency cut-off valve, wherein the overcurrent performance testing device comprises a liquid supply unit, a liquid inlet pipe (1) and a liquid outlet pipe (2), the liquid outlet of the liquid supply unit is communicated with the inlet of the emergency cut-off valve (3) through the liquid inlet pipe (1) so as to be used for providing liquid with pressure for the liquid inlet pipe (1) and the emergency cut-off valve (3), a mass flowmeter (5) is arranged on the liquid inlet pipe (1), the liquid outlet pipe (2) is communicated with the outlet of the emergency cut-off valve (3), a first control valve (6) is arranged on the liquid outlet pipe (2), and the overcurrent performance testing device further comprises a controller (7) for controlling the opening degree of the first control valve (6). The overcurrent performance testing device can accurately measure the instantaneous maximum flow before the emergency cutoff valve is closed, thereby ensuring that the emergency cutoff valve can be cut off emergently in the accident state of sudden flow increase.
Description
Technical Field
The invention relates to the field of equipment testing, in particular to an overcurrent performance testing device and an overcurrent performance testing method for an emergency cut-off valve.
Background
The emergency cut-off valve is a pure mechanical trigger structure and is an important safety accessory on the liquefied hydrocarbon tank car, when the liquid flow is too large due to accidents, the emergency cut-off valve can be automatically closed due to overflowing, a conveying flow channel of the tank car is quickly cut off, and the liquefied hydrocarbon is prevented from being leaked and volatilized to form an explosive environment. The overcurrent performance of the emergency cut-off valve is a key factor for ensuring the completion of the action. A general requirement for the ability of the slam shut valve to flow is that the instantaneous maximum flow before the slam shut should be within ± 10% of the rated flow.
Therefore, in order to avoid the over-current protection of the quick action emergency valve due to the failure of the quick action emergency valve to automatically close in an accident situation, it is necessary to test the over-current performance of the quick action emergency valve.
Disclosure of Invention
The invention aims to provide an overcurrent performance testing device and an overcurrent performance testing method for an emergency cut-off valve, which are used for accurately measuring the instantaneous maximum flow before the emergency cut-off valve is closed, so that the emergency cut-off valve can be cut off emergently in an accident state of sudden increase of the flow.
In order to achieve the above object, in one aspect, the present invention provides an overcurrent performance testing apparatus for an emergency shut-off valve, including a liquid supply unit, a liquid inlet pipe and a liquid outlet pipe, where the liquid outlet of the liquid supply unit is communicated with an inlet of the emergency shut-off valve through the liquid inlet pipe to provide pressurized liquid to the liquid inlet pipe and the emergency shut-off valve, the liquid inlet pipe is provided with a mass flow meter, the liquid outlet pipe is communicated with an outlet of the emergency shut-off valve, the liquid outlet pipe is provided with a first control valve, and the overcurrent performance testing apparatus further includes a controller for controlling an opening degree of the first control valve.
Preferably, a pressure sensor is arranged on the liquid inlet pipe.
Preferably, the liquid supply unit comprises a pressure stabilizing tank and a centrifugal pump for pumping liquid into the pressure stabilizing tank, and a second control valve is arranged on the liquid inlet pipe at a position upstream of the pressure sensor and the mass flow meter.
Preferably, the controller is configured to control opening and closing of the second control valve.
Preferably, the overcurrent performance testing device comprises a clamp tool, and the emergency cut-off valve is fixedly installed on the clamp tool.
In another aspect, the invention provides an overcurrent performance testing method for an emergency cut-off valve, which adopts the overcurrent performance testing device, and comprises the following steps:
s1, enabling the emergency cutoff valve to be tested to be in an open state and enabling the first control valve to be in a closed state;
s2, introducing pressurized liquid into the liquid inlet pipe and the emergency cut-off valve by using the liquid supply unit, and after the liquid inlet pipe and the emergency cut-off valve are filled with the pressurized liquid, controlling the first control valve to gradually increase from the minimum opening degree through the controller until the emergency cut-off valve is automatically closed, wherein at each opening degree, after the reading of the mass flowmeter is stable, the reading of the mass flowmeter is increased to the next opening degree;
s3, recording the reading of the mass flowmeter when the emergency cut-off valve is closed to obtain the maximum flow of the emergency cut-off valve;
and S4, comparing the maximum flow with the rated flow of the emergency cut-off valve, and judging whether the maximum flow is within +/-10% of the rated flow.
Preferably, the step S1 includes providing a pressure sensor on the liquid inlet pipe, and in the step S2, after the pressure indicated by the pressure sensor is stabilized, it is determined that the liquid under pressure fills the liquid inlet pipe and the emergency cut-off valve; and/or
The method comprises repeating the steps S1-S4 3-5 times.
Preferably, the liquid supply unit includes a surge tank and a centrifugal pump for pumping liquid into the surge tank, and the step S1 includes: a second control valve is arranged on the liquid inlet pipe at a position upstream of the pressure sensor and the mass flow meter; opening the second control valve after introducing the liquid into the surge tank using the centrifugal pump.
Preferably, the step S1 includes fixing the quick action emergency valve.
Through the technical scheme, the overcurrent performance testing device can accurately measure the instantaneous maximum flow before the emergency cut-off valve is closed, so that the overcurrent protection function of the emergency cut-off valve can be conveniently judged by contrasting the rated flow, and the emergency cut-off valve can be ensured to be cut off emergently in the accident state of sudden flow increase. In addition, the overcurrent performance testing device has the advantages of simplicity and convenience in operation and low cost.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic diagram of an overcurrent performance testing apparatus according to the present invention.
Description of the reference numerals
1 liquid inlet pipe and 2 liquid outlet pipes
3 emergency cut-off valve 4 pressure sensor
5 mass flow meter 6 first control valve
7 controller 8 surge tank
9 centrifugal pump 10 second control valve
11 overflow valve
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, the terms of orientation such as "inside and outside" used herein mean inside and outside with respect to the contour of each member itself, unless otherwise specified.
The invention provides an overcurrent performance testing device for an emergency cut-off valve, which comprises a liquid supply unit, a liquid inlet pipe 1 and a liquid outlet pipe 2, wherein a liquid outlet of the liquid supply unit is communicated with an inlet of the emergency cut-off valve 3 through the liquid inlet pipe 1 so as to be used for providing liquid with pressure for the liquid inlet pipe 1 and the emergency cut-off valve 3, a mass flowmeter 5 is arranged on the liquid inlet pipe 1, the liquid outlet pipe 2 is communicated with an outlet of the emergency cut-off valve 3, a first control valve 6 is arranged on the liquid outlet pipe 2, and the overcurrent performance testing device further comprises a controller 7 used for controlling the opening degree of the first control valve 6.
During testing, the liquid feeding unit is used for filling liquid with pressure into the liquid inlet pipe 1 and the emergency cut-off valve 3, then the opening degree of the first control valve 6 is controlled to control the liquid flow flowing through the emergency cut-off valve 3 until the liquid flow corresponding to the opening degree of the first control valve 6 reaches the overcurrent protection value of the emergency cut-off valve 3, and when the emergency cut-off valve 3 is closed, the instantaneous maximum flow of the emergency cut-off valve 3 before closing is measured through the mass flow meter 5.
Through the technical scheme, the overcurrent performance testing device can accurately measure the instantaneous maximum flow before the emergency cut-off valve is closed, so that the overcurrent protection function of the emergency cut-off valve can be conveniently judged by contrasting the rated flow, and the emergency cut-off valve can be ensured to be cut off emergently in the accident state of sudden flow increase. In addition, the overcurrent performance testing device has the advantages of simplicity and convenience in operation and low cost.
In the above, before the first control valve 6 is opened, the liquid inlet pipe 1 and the quick action emergency valve 3 are filled with the liquid under pressure, which is an important factor for ensuring the accuracy of the maximum flow measurement result of the quick action emergency valve 3. In order to accurately judge whether the pressurized liquid is filled in the liquid inlet pipe 1 and the emergency cut-off valve 3 or not and shorten the test time, the pressure sensor 4 can be arranged on the liquid inlet pipe 1, and when the pressure measured by the pressure sensor 4 is stable, the pressurized liquid is considered to be filled in the liquid inlet pipe 1 and the emergency cut-off valve 3.
In the present invention, the specific structure of the liquid supply unit is not limited. According to a preferred embodiment of the present invention, as shown in fig. 1, the liquid supply unit comprises a surge tank 8 and a centrifugal pump 9 for pumping liquid into the surge tank 8, and a second control valve 10 is provided on the liquid inlet pipe 1 at a position upstream of the pressure sensor 4 and the mass flow meter 5. Wherein, surge tank 8 can adjust the pressure fluctuation in feed liquor pipe 1 and the 3 quick emergency valves, specifically is: when the pressure of the liquid in the liquid inlet pipe 1 and the emergency cut-off valve 3 is greater than the pressure of the pressure stabilizing tank 8, the liquid in the liquid inlet pipe 1 and the emergency cut-off valve 3 can be squeezed into the pressure stabilizing tank 8 under the action of the pressure until the pressure of the liquid inlet pipe 1 and the emergency cut-off valve 3 and the pressure of the pressure stabilizing tank 8 reach new balance; when the liquid pressure in the liquid inlet pipe 1 and the emergency cut-off valve 3 is smaller than the pressure of the surge tank 8, the liquid in the surge tank 8 can be extruded out under the action of the pressure and is supplemented back to the liquid inlet pipe 1 and the emergency cut-off valve 3 until the liquid inlet pipe 1 and the emergency cut-off valve reach new balance. Like this, after the centrifugal pump 9 is gone into liquid to surge tank 8 in, open second control valve 10, liquid in surge tank 8 can get into feed liquor pipe 1 and quick action emergency valve 3 under the pressure effect in, is full of liquid in feed liquor pipe 1 and quick action emergency valve 3, and after the pressure stabilization, liquid stops flowing out in surge tank 8.
Wherein, the surge tank 8 can be provided with an overflow valve 11 to discharge the overflowed air in the liquid inlet pipe 1 and the emergency cut-off valve 3 and the surge tank 8.
In order to improve the convenience of the operation of the overcurrent performance testing device, the controller 7 may be configured to control the opening and closing of the second control valve 10. In the present invention, the first control valve 6 and the second control valve 10 may be solenoid valves.
In addition, the overcurrent performance testing device also comprises a fixture tool, and the emergency cut-off valve 3 is fixedly installed on the fixture tool. Therefore, the emergency cut-off valve 3 can be prevented from moving or shaking in the test process, so that the test is influenced and the accuracy of the test result is improved.
In another aspect, the invention provides an overcurrent performance testing method for an emergency cut-off valve, which adopts the overcurrent performance testing device, and comprises the following steps:
s1, enabling the emergency cut-off valve 3 to be tested to be in an open state, and enabling the first control valve 6 to be in a closed state;
s2, introducing pressurized liquid into the liquid inlet pipe 1 and the emergency cut-off valve 3 by using the liquid supply unit, after the pressurized liquid is filled in the liquid inlet pipe 1 and the emergency cut-off valve 3, controlling the first control valve 6 to gradually increase from the minimum opening degree through the controller 7 until the emergency cut-off valve 3 is automatically closed, wherein at each opening degree, after the reading of the mass flow meter 5 is stable, the reading is increased to the next opening degree;
s3, recording the reading of the mass flowmeter 5 when the emergency cut-off valve 3 is closed, and obtaining the maximum flow of the emergency cut-off valve 3;
and S4, comparing the maximum flow with the rated flow of the emergency cut-off valve 3, and judging whether the maximum flow is within +/-10% of the rated flow.
Through the technical scheme, the overcurrent performance testing method can accurately measure the instantaneous maximum flow before the emergency cutoff valve is closed, so that the overcurrent protection function of the emergency cutoff valve can be conveniently judged by contrasting the rated flow, and the emergency cutoff valve can be emergently cut off in the accident state of sudden flow increase.
In the above, it can be understood that if the maximum flow rate is within ± 10% of the rated flow rate, it is determined that the overcurrent performance of the measured quick action emergency valve 3 meets the requirement; if the maximum flow is not within +/-10% of the rated flow, judging that the overcurrent performance of the measured emergency cut-off valve 3 does not meet the requirement, adjusting the opening degree of a pilot valve in the emergency cut-off valve 3 to change the flow, and then testing the overcurrent performance again until the adjustment is qualified.
In order to accurately determine whether the pressurized liquid is filled in the liquid inlet pipe 1 and the emergency cut-off valve 3 and shorten the testing time, the step S1 may include arranging the pressure sensor 4 on the liquid inlet pipe 1, and in the step S2, after the pressure indicated by the pressure sensor 4 is stabilized, it is determined that the pressurized liquid is filled in the liquid inlet pipe 1 and the emergency cut-off valve 3.
In the present invention, in order to further ensure the reliability of the use of the emergency cut-off valve 3, the method may include repeating the steps S1-S4 3-5 times, and when the maximum flow rate of the emergency cut-off valve 3 is measured within ± 10% of the rated flow rate each time, the flow-through performance of the emergency cut-off valve 3 is considered to be satisfactory.
In addition, according to an embodiment of the present invention, the step S1 includes: a second control valve 10 is arranged on the liquid inlet pipe 1 at a position upstream of the pressure sensor 4 and the mass flow meter 5; the second control valve 10 is opened after the liquid is introduced into the surge tank 8 by means of the centrifugal pump 9.
In addition, the step S1 may further include fixing the quick disconnect valve 3, for example, to the jig tool.
The overcurrent performance test method of the invention is further described by the following specific embodiments:
examples
Referring to fig. 1, an emergency cut-off valve 3 to be tested is fixedly mounted on a fixture, a liquid outlet of a pressure stabilizing tank 8 is communicated with an inlet of the emergency cut-off valve 3 through a liquid inlet pipe 1, a liquid inlet of the pressure stabilizing tank 8 is connected with a centrifugal pump 9, a liquid outlet pipe 2 is connected at an outlet of the emergency cut-off valve 3, a second control valve 10, a mass flow meter 5 and a pressure sensor 4 are sequentially arranged on the liquid inlet pipe 1 along the inlet and outlet direction of the liquid inlet pipe 1, a first control valve 6 is arranged on the liquid outlet pipe 2, the first control valve 6 and the second control valve 10 are electrically connected with a controller 7, the emergency cut-off valve 3 is in an open state, and the first control valve 6 and the second control valve 10 are in a closed state;
connecting a centrifugal pump 9 with a water source, starting the centrifugal pump 9 to introduce water into a pressure stabilizing tank 8, opening a second control valve 10 to introduce pressurized water flow to a liquid inlet pipe 1 and an emergency cut-off valve 3, and after the pressure indicated by a pressure sensor 4 is stabilized, controlling a first control valve 6 to gradually increase from a minimum opening degree (2 degrees) (the degree is increased by 2 degrees each time) through a controller 7 until the emergency cut-off valve 3 is automatically closed, wherein under each opening degree, the reading of a mass flowmeter 5 is stabilized and then increased to the next opening degree;
recording the reading of the mass flowmeter 5 when the emergency cut-off valve 3 is closed to obtain the maximum flow of the emergency cut-off valve 3;
comparing the maximum flow with the rated flow of the emergency cut-off valve 3, and judging whether the maximum flow is within +/-10% of the rated flow;
repeating the steps for 3 times, and if the maximum flow of the emergency cut-off valve 3 measured each time is within +/-10% of the rated flow, judging that the overcurrent performance of the measured emergency cut-off valve 3 meets the requirement; if the maximum flow is not within +/-10% of the rated flow, judging that the measured overcurrent performance of the emergency cut-off valve 3 is not in accordance with the requirement, adjusting the opening degree of a pilot valve in the emergency cut-off valve 3 to change the flow, and then testing the overcurrent performance again until the adjustment is qualified.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (9)
1. The utility model provides a performance test device overflows for emergency cut-off valve, a serial communication port, including supplying liquid unit, feed liquor pipe (1) and drain pipe (2), the liquid outlet that supplies the liquid unit passes through feed liquor pipe (1) with the entry intercommunication of emergency cut-off valve (3), in order to be used for to feed liquor pipe (1) with emergency cut-off valve (3) provide the liquid of taking the pressure, be provided with mass flow meter (5) on feed liquor pipe (1), drain pipe (2) with the export intercommunication of emergency cut-off valve (3), be provided with first control valve (6) on drain pipe (2), performance test device overflows still including being used for control controller (7) of first control valve (6) aperture.
2. The overcurrent performance testing device as recited in claim 1, wherein a pressure sensor (4) is arranged on the liquid inlet pipe (1).
3. The excess flow performance test device of claim 2, wherein the liquid supply unit comprises a surge tank (8) and a centrifugal pump (9) for pumping liquid into the surge tank (8), and a second control valve (10) is arranged on the liquid inlet pipe (1) at a position upstream of the pressure sensor (4) and the mass flow meter (5).
4. The excess flow performance test device of claim 3, wherein the controller (7) is configured to control opening and closing of the second control valve (10).
5. The device for testing the overcurrent performance as set forth in any one of claims 1 to 4, wherein the device for testing the overcurrent performance comprises a clamp tool, and the emergency cutoff valve (3) is fixedly mounted on the clamp tool.
6. An overcurrent performance testing method for an emergency cutoff valve, characterized in that the method employs the overcurrent performance testing apparatus of claim 1, and the method comprises the steps of:
s1, enabling the emergency cut-off valve (3) to be tested to be in an open state, and enabling the first control valve (6) to be in a closed state;
s2, introducing liquid under pressure into the liquid inlet pipe (1) and the emergency stop valve (3) by using the liquid supply unit, after the liquid under pressure fills the liquid inlet pipe (1) and the emergency stop valve (3), controlling the first control valve (6) to gradually increase from the minimum opening degree through the controller (7) until the emergency stop valve (3) is automatically closed, wherein under each opening degree, the first control valve is increased to the next opening degree after the reading of the mass flow meter (5) is stable;
s3, recording the reading of the mass flowmeter (5) when the emergency cut-off valve (3) is closed, and obtaining the maximum flow of the emergency cut-off valve (3);
and S4, comparing the maximum flow with the rated flow of the emergency cut-off valve (3), and judging whether the maximum flow is within +/-10% of the rated flow.
7. The excess flow performance test method according to claim 6, wherein the step S1 includes arranging a pressure sensor (4) on the liquid inlet pipe (1), and in the step S2, after the pressure indicated by the pressure sensor (4) is stabilized, it is determined that the liquid under pressure fills the liquid inlet pipe (1) and the emergency cut-off valve (3); and/or
The method comprises repeating the steps S1-S4 3-5 times.
8. The excess flow performance test method according to claim 7, wherein the liquid supply unit comprises a surge tank (8) and a centrifugal pump (9) for pumping liquid into the surge tank (8), and the step S1 comprises: a second control valve (10) is arranged on the liquid inlet pipe (1) at a position upstream of the pressure sensor (4) and the mass flowmeter (5); the second control valve (10) is opened after the introduction of the liquid into the surge tank (8) by means of the centrifugal pump (9).
9. The excess flow performance test method according to any one of claims 6 to 8, wherein the step S1 includes fixing the quick action emergency valve (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910506876.6A CN112082753A (en) | 2019-06-12 | 2019-06-12 | Overcurrent performance testing device and method for emergency cut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910506876.6A CN112082753A (en) | 2019-06-12 | 2019-06-12 | Overcurrent performance testing device and method for emergency cut-off valve |
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| CN112082753A true CN112082753A (en) | 2020-12-15 |
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| CN201910506876.6A Pending CN112082753A (en) | 2019-06-12 | 2019-06-12 | Overcurrent performance testing device and method for emergency cut-off valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816206A (en) * | 2021-01-18 | 2021-05-18 | 湖南省特种设备检验检测研究院 | Tank car emergency cut-off valve function testing method and device |
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| US20040093173A1 (en) * | 2001-02-07 | 2004-05-13 | Essam Derek Mark | Apparatus for testing operation of an emerceny valve |
| CN101750225A (en) * | 2009-12-31 | 2010-06-23 | 葫芦岛市特种设备监督检验所 | Over-flow checking table of emergency cut-off valve |
| CN101839963A (en) * | 2010-05-27 | 2010-09-22 | 江南大学 | Quick action emergency valve automatic checkout system |
| CN104990699A (en) * | 2015-07-03 | 2015-10-21 | 武汉华威专用汽车检测有限责任公司 | Multi-functional test stand and bending and torsion test method of emergency cut-off valve |
| CN106568588A (en) * | 2016-11-03 | 2017-04-19 | 北京市公用事业科学研究所 | Excess flow cut-off valve reliability automatic detection device |
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2019
- 2019-06-12 CN CN201910506876.6A patent/CN112082753A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040093173A1 (en) * | 2001-02-07 | 2004-05-13 | Essam Derek Mark | Apparatus for testing operation of an emerceny valve |
| CN101750225A (en) * | 2009-12-31 | 2010-06-23 | 葫芦岛市特种设备监督检验所 | Over-flow checking table of emergency cut-off valve |
| CN101839963A (en) * | 2010-05-27 | 2010-09-22 | 江南大学 | Quick action emergency valve automatic checkout system |
| CN104990699A (en) * | 2015-07-03 | 2015-10-21 | 武汉华威专用汽车检测有限责任公司 | Multi-functional test stand and bending and torsion test method of emergency cut-off valve |
| CN106568588A (en) * | 2016-11-03 | 2017-04-19 | 北京市公用事业科学研究所 | Excess flow cut-off valve reliability automatic detection device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816206A (en) * | 2021-01-18 | 2021-05-18 | 湖南省特种设备检验检测研究院 | Tank car emergency cut-off valve function testing method and device |
| CN112816206B (en) * | 2021-01-18 | 2022-08-12 | 湖南省特种设备检验检测研究院 | Tank car emergency cut-off valve function testing method and device |
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