CN113984309B - Safety valve spring failure detection system and method - Google Patents
Safety valve spring failure detection system and method Download PDFInfo
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- CN113984309B CN113984309B CN202111222942.0A CN202111222942A CN113984309B CN 113984309 B CN113984309 B CN 113984309B CN 202111222942 A CN202111222942 A CN 202111222942A CN 113984309 B CN113984309 B CN 113984309B
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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
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
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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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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
- Safety Valves (AREA)
Abstract
The application discloses a safety valve spring failure detection system and a safety valve spring failure detection method. The detection system includes: safety valve main part, load cell, pressure transmitter and data processing system, wherein, the safety valve main part includes: the upper spring seat and the compression ring are arranged on the safety valve main body, the upper end face of the force transducer is connected with the compression ring, and the lower end face of the force transducer is connected with the upper spring seat; the force transducer is connected with the pressure transmitter, and the pressure transmitter is connected with the data processing system; a load cell configured to measure a spring force of the spring; a pressure transmitter configured to amplify the spring force to generate a spring pressure signal detection value; and a data processing system configured to detect whether the spring of the safety valve fails according to the spring pressure signal detection value. The application can ensure that the safety valve meets the requirement of the overpressure protection performance index and realize the effective detection of the failure of the spring of the safety valve.
Description
Technical Field
The application relates to the technical field of spring detection, in particular to a safety valve spring failure detection system and method.
Background
The safety valve is widely applied to various fields of national economy such as petroleum, chemical industry, power stations, metallurgy, nuclear power, national defense and the like, and provides overpressure protection for pressure pipelines and pressure containers of various devices to ensure the safety of the devices. The accuracy of the set pressure is an important performance index of the safety valve and is the basis for realizing the overpressure protection function. The ASME BPVC standard and the domestic safety valve standard define deviation indexes of the set pressure of the safety valve under different working conditions. For a traditional safety valve, a spring is an important factor for determining the accuracy of the setting pressure, and once the spring fails online, the accuracy of the setting pressure of the safety valve is inevitably reduced. Therefore, the on-line monitoring and failure diagnosis of the spring are of great significance for ensuring the normal operation of the safety valve and realizing overpressure protection.
If the safety valve is operated in a stable environment for a long period of time, the spring is less likely to fail. However, in practical production, the working environment of the safety valve is relatively complex, and if the medium is corrosive, local defects of the spring can be caused, so that the possibility of fracture is increased. If the safety valve is frequently opened and closed in the running process, the number of times of action of dynamic load born by the spring in a certain time is more, the possibility of fatigue failure of the spring is greatly improved, and the spring is likely to break under serious conditions. Failure modes of the relief valve spring can be categorized as corrosion, fatigue, plastic deformation and fracture, all of which result in significant changes in spring force.
Disclosure of Invention
The application solves the technical problems that: overcomes the defects of the prior art and provides a safety valve spring failure detection system and a safety valve spring failure detection method.
The technical scheme of the application is as follows:
in a first aspect, an embodiment of the present application provides a safety valve spring failure detection system, including: safety valve main part, load cell, pressure transmitter and data processing system, wherein, the safety valve main part includes: an upper spring seat and a compression ring,
the force transducer is arranged on the safety valve main body, the upper end face of the force transducer is connected with the compression ring, and the lower end face of the force transducer is connected with the upper spring seat;
the force transducer is connected with the pressure transmitter, and the pressure transmitter is connected with the data processing system;
the load cell is configured to measure a spring force of the spring;
the pressure transmitter is configured to amplify the spring force to generate a spring pressure signal detection value;
the data processing system is configured to detect whether the spring of the safety valve fails according to the spring pressure signal detection value.
Optionally, the detection system further comprises: and the input power supply is connected with the force transducer and the pressure transmitter to provide electric energy for the force transducer and the pressure transmitter.
Optionally, the detection system further comprises: and the signal input lead is connected with the pressure transmitter through the signal input lead.
Optionally, the detection system further comprises: and the pressure transmitter is connected with the data processing system through the signal output lead.
Optionally, the data processing system is further configured to compare the spring pressure signal detection value with an initial value, and determine whether the spring of the safety valve fails according to the comparison result.
Optionally, the detection system further comprises: an alarm configured to issue an alarm upon detection of a spring failure of the safety valve.
Optionally, the safety valve body further includes: valve cap and spring.
In a second aspect, an embodiment of the present application provides a method for detecting failure of a safety valve spring, which is applied to the detection system described in any one of the above, and the method includes the following steps:
the spring force of the spring of the safety valve is measured through a force transducer arranged between an upper spring seat of the spring and the compression ring;
amplifying the spring force to generate a spring pressure signal detection value;
and detecting whether the spring of the safety valve fails according to the spring pressure signal detection value.
Optionally, detecting whether the spring of the safety valve fails according to the spring pressure signal detection value includes:
comparing the spring pressure signal detection value with an initial value to obtain a comparison result;
and determining whether the spring of the safety valve fails according to the comparison result.
Compared with the prior art, the application has the advantages that:
according to the embodiment of the application, the advanced sensor technology, the fault diagnosis technology and the safety valve technology are deeply integrated, so that the safety valve not only meets the requirement of an overpressure protection performance index, but also can realize self-monitoring, self-diagnosis and automatic alarm of spring failure.
Drawings
FIG. 1 is a schematic diagram of a safety valve spring failure detection system according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a safety valve and load cell connection structure according to an embodiment of the present application;
fig. 3 is a flowchart of steps of a method for detecting failure of a safety valve spring according to an embodiment of the present application.
Detailed Description
According to the background technology, the application aims to design an online diagnosis method for the failure of the safety valve spring, so that the safety valve is an intelligent product with the functions of spring state self-monitoring, fault diagnosis and automatic alarm.
In order to achieve the above object, the present application is innovated mainly from the following three aspects:
(1) The structural scheme is as follows: the application aims to realize the on-line monitoring and early warning of the failure of the safety valve spring, and integrates the force transducer into the traditional safety valve structure through the improvement of structural optimization. In order to meet the long-term and high-precision monitoring needs, the strain type force transducer based on the Wheatstone bridge principle is adopted, so that the output signal change caused by constant load is ensured to be very small, and meanwhile, the measuring error is only 0.2%, so that the requirement of long-term static monitoring on spring force is met.
In order to improve the accuracy of the monitoring data, the force transducer is close to the spring to the greatest extent, and the influence of friction force, lateral force and other factors on the monitoring data is avoided. The application carries out the re-optimization design on the local structure of the safety valve, adjusts the spring seat structure according to the structural size of the sensor, divides the traditional spring seat structure into two parts, namely an upper spring seat and a compression ring. The upper end face of the force transducer is connected with the compression ring, and the lower end face is connected with the upper spring seat. The spring force is directly transmitted to the force transducer through the upper spring seat, so that the accuracy of spring force measurement can be ensured. Simultaneously, the upper spring seat and the compression ring jointly realize the guiding and centering effect, so that the influence of structural change on the safety valve is reduced to the greatest extent, the smooth action of the safety valve is ensured, and the stable operation of the force transducer is realized.
(2) Data analysis and diagnosis method: the spring force monitoring and diagnosing system consists of a safety valve, a force transducer, a transmitter, an external power supply and a data processing system. In the working process of the safety valve, the force transducer outputs a voltage signal in real time according to the spring force, and the effective voltage signal is converted into a spring force numerical value signal and transmitted to the data processing system through the processes of amplification, filtering and the like of the transmitter. The data system compares the collected spring force data with indexes such as an initial spring force set value in real time, and when the spring force is reduced to reach a set deviation, the system judges that the spring is likely to fail online and sends an early warning signal to a user. When the spring force monitoring value is higher than the initial value by more than a prescribed value, the safety valve is considered to take off, and the data processing system prompts a user to check the valve state and reset the initial value.
(3) Special working condition treatment: the force transducer in the scheme is generally applicable to working temperatures of-20 ℃ to 80 ℃, and the force transducer with special materials and structures can be custom developed under working conditions exceeding the temperature range, so that the working condition requirements are met; according to the scheme, the lead of the force transducer is led out through the side hole of the valve cover of the safety valve, so that the working condition that the outlet back pressure exists in the safety valve can be adopted, the technical scheme that the bellows is added to the safety valve can be adopted, leakage of outlet medium is avoided, and normal operation of the safety valve is ensured.
Example 1
Referring to fig. 1, a schematic structural diagram of a safety valve spring failure detection system provided by an embodiment of the present application is shown, and as shown in fig. 1, the detection system is composed of a safety valve main body 1, a load cell 2, a pressure transmitter 3, an input power supply 4, a signal input lead 5, a signal output lead 6, and a data processing system 7. The force transducer 2 is arranged on the safety valve main body 1 and is connected with the pressure transmitter 3 through a signal input lead 5; the input power supply 4 is connected with the pressure transmitter 3 and is responsible for supplying power to the pressure transmitter 3 and the force transducer 2; the load cell 2 transmits the measurement signal to the pressure transmitter 3, and the signal is amplified and then output to the data processing system 7 through the signal output lead 6.
As shown in FIG. 2, the application performs an optimal design on the traditional safety valve spring connection structure. Specifically, an open valve cover 8 is used to disassemble a traditional spring seat into an upper spring seat 10 and a compression ring 11. The upper end face of the force transducer 2 is connected with the compression ring 11, the lower end face is connected with the upper spring seat 10, the upper spring seat 10 and the compression ring 11 jointly realize guiding and centering effects, and the spring force of the spring 9 is transmitted to the force transducer 2.
As shown in FIG. 1, the safety valve spring failure on-line diagnosis method is that the spring force is monitored in real time through the load cell 2, the data processing system 7 compares the collected data with indexes such as initial values, and when the compression force is reduced to reach a specified value, the on-line failure judgment of the spring is realized and an early warning signal is sent out.
Initial value confirmation: the safety valve is continuously monitored for 1 hour after being stably operated on line, and the obtained average value is the initial value of the load cell 2.
Early warning: and when the monitoring value of the spring force is reduced to 97% of the initial value compared with the initial value, the data processing system 7 sends out a signal to realize early warning.
Resetting: when the spring force monitor value is higher than the initial value by 103%, the safety valve is considered to jump, and the data processing system 7 prompts the valve state check and the initial value reset.
In a specific implementation of an embodiment of the present application, the detection system may further include: an input power source may be coupled to the load cell and the pressure transmitter to provide electrical power to the load cell and the pressure transmitter.
In another specific implementation of the embodiment of the present application, the detection system may further include: the signal input lead wire, the force transducer can be connected with the pressure transmitter through the signal input lead wire.
In another specific implementation of the embodiment of the present application, the detection system may further include: the signal output lead wire, the pressure transmitter can be connected with a data processing system through the signal output lead wire.
In another specific implementation of the embodiment of the present application, the data processing system may be further configured to compare the detected value of the spring pressure signal with an initial value, and determine whether the spring of the safety valve fails according to the comparison result.
In another specific implementation of the embodiment of the present application, the detection system may further include: an alarm (not shown) configured to issue an alarm upon detection of a spring failure of the safety valve.
Example two
Referring to fig. 3, a step flowchart of a method for detecting failure of a safety valve spring according to an embodiment of the present application is shown, and the method may be applied to the system for detecting failure of a safety valve spring in the first embodiment, as shown in fig. 3, and the method for detecting failure of a safety valve spring may include the following steps:
step 301: and measuring the spring force of the spring of the safety valve through a force transducer arranged between the upper spring seat of the spring and the compression ring.
In the embodiment of the application, the spring force of the spring of the safety valve can be measured through the force transducer arranged between the upper spring seat of the spring and the compression ring.
In this embodiment, the conventional spring seat is disassembled into an upper spring seat and a compression ring. The upper end face of the force transducer is connected with the compression ring, the lower end face of the force transducer is connected with the upper spring seat, and the upper spring seat and the compression ring jointly realize the guiding centering function and transmit the spring to the force transducer.
After measuring the spring force of the spring of the safety valve, step 302 is performed.
Step 302: and amplifying the spring force to generate a spring pressure signal detection value.
After the spring force of the spring of the safety valve is measured, a pressure transmitter may be used to amplify the spring force to generate a spring pressure signal detection value.
After the signal amplification process is performed on the spring force to generate a spring pressure signal detection value, step 303 is performed.
Step 303: and detecting whether the spring of the safety valve fails according to the spring pressure signal detection value.
After the spring force is subjected to signal amplification processing to generate a spring pressure signal detection value, whether the spring of the safety valve fails or not can be detected according to the spring pressure signal detection value.
In this embodiment, the data processing system may compare the collected data with the index such as the initial value, and when the compression force decreases to reach the specified value, realize the online failure determination of the spring and send out the early warning signal.
Initial value confirmation: and continuously monitoring the safety valve for 1 hour after the safety valve is stably operated on line, wherein the obtained average value is the initial value of the force transducer.
Early warning: and when the monitoring value of the spring force is reduced to 97% of the initial value compared with the initial value, the data processing system sends out a signal to realize early warning.
Resetting: when the spring force monitoring value is 103% higher than the initial value, the safety valve is considered to jump, and the data processing system prompts the valve state to be checked and resets the initial value.
The described embodiments of the present application will enable those skilled in the art to more fully understand the application, but do not limit it in any way. Accordingly, it will be understood by those skilled in the art that the present application may be modified or equivalents substituted; all technical solutions and modifications thereof that do not depart from the spirit and technical essence of the application should be included in the protection scope of the patent of the application.
What is not described in detail in the present specification is a well known technology to those skilled in the art.
Claims (9)
1. A safety valve spring failure detection system, the detection system comprising: safety valve main part, load cell, pressure transmitter and data processing system, wherein, the safety valve main part includes: an upper spring seat and a compression ring,
the force transducer is arranged on the safety valve main body, the upper end face of the force transducer is connected with the compression ring, and the lower end face of the force transducer is connected with the upper spring seat;
the force transducer is connected with the pressure transmitter, and the pressure transmitter is connected with the data processing system;
the load cell is configured to measure a spring force of the spring; a strain type force transducer based on a Wheatstone bridge principle is adopted;
the pressure transmitter is configured to amplify the spring force to generate a spring pressure signal detection value;
the data processing system is configured to detect whether the spring of the safety valve fails according to the spring pressure signal detection value; the specific method for detecting whether the spring of the safety valve fails comprises the following steps: the data processing system compares the collected spring force with a spring force set value in real time, and when the spring force is reduced to reach a set deviation, the system judges that the spring is in online failure and sends an early warning signal to a user; when the spring force monitoring value is higher than the spring force set value and exceeds the set deviation, the safety valve is considered to jump, and the data processing system prompts a user to check the valve state and reset the initial value.
2. The detection system of claim 1, wherein the detection system further comprises: and the input power supply is connected with the force transducer and the pressure transmitter to provide electric energy for the force transducer and the pressure transmitter.
3. The detection system of claim 1, wherein the detection system further comprises: and the signal input lead is connected with the pressure transmitter through the signal input lead.
4. The detection system of claim 1, wherein the detection system further comprises: and the pressure transmitter is connected with the data processing system through the signal output lead.
5. The detection system of claim 1, wherein the data processing system is further configured to compare the spring pressure signal detection value to an initial value and determine if the spring of the safety valve fails based on the comparison.
6. The detection system of claim 1, wherein the detection system further comprises: an alarm configured to issue an alarm upon detection of a spring failure of the safety valve.
7. The detection system of claim 1, wherein the safety valve body further comprises: valve cap and spring.
8. A safety valve spring failure detection method applied to the detection system of any one of claims 1 to 7, characterized in that the method comprises the steps of:
the spring force of the spring of the safety valve is measured through a force transducer arranged between an upper spring seat of the spring and the compression ring;
amplifying the spring force to generate a spring pressure signal detection value;
and detecting whether the spring of the safety valve fails according to the spring pressure signal detection value.
9. The method of claim 8, wherein detecting whether the spring of the relief valve has failed based on the spring pressure signal detection value comprises:
comparing the spring pressure signal detection value with an initial value to obtain a comparison result;
and determining whether the spring of the safety valve fails according to the comparison result.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111222942.0A CN113984309B (en) | 2021-10-20 | 2021-10-20 | Safety valve spring failure detection system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111222942.0A CN113984309B (en) | 2021-10-20 | 2021-10-20 | Safety valve spring failure detection system and method |
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| CN113984309A CN113984309A (en) | 2022-01-28 |
| CN113984309B true CN113984309B (en) | 2023-09-29 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05296883A (en) * | 1992-04-17 | 1993-11-12 | Nissei Eng Kk | Testing equipment of operation of safety valve |
| CN103711318A (en) * | 2013-12-17 | 2014-04-09 | 柳州黔桥工程材料有限公司 | Smart tensioning device calibrating method |
| CN105551553A (en) * | 2015-12-15 | 2016-05-04 | 中广核工程有限公司 | Pilot type safety valve jumping monitoring device and method of PWR (Pressured Water Reactor) nuclear power station |
| CN107605823A (en) * | 2017-08-24 | 2018-01-19 | 哈电集团哈尔滨电站阀门有限公司 | A kind of spring safety valve debugging apparatus |
| CN207848066U (en) * | 2017-08-24 | 2018-09-11 | 哈电集团哈尔滨电站阀门有限公司 | A kind of spring safety valve debugging apparatus |
-
2021
- 2021-10-20 CN CN202111222942.0A patent/CN113984309B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05296883A (en) * | 1992-04-17 | 1993-11-12 | Nissei Eng Kk | Testing equipment of operation of safety valve |
| CN103711318A (en) * | 2013-12-17 | 2014-04-09 | 柳州黔桥工程材料有限公司 | Smart tensioning device calibrating method |
| CN105551553A (en) * | 2015-12-15 | 2016-05-04 | 中广核工程有限公司 | Pilot type safety valve jumping monitoring device and method of PWR (Pressured Water Reactor) nuclear power station |
| CN107605823A (en) * | 2017-08-24 | 2018-01-19 | 哈电集团哈尔滨电站阀门有限公司 | A kind of spring safety valve debugging apparatus |
| CN207848066U (en) * | 2017-08-24 | 2018-09-11 | 哈电集团哈尔滨电站阀门有限公司 | A kind of spring safety valve debugging apparatus |
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| CN113984309A (en) | 2022-01-28 |
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