1. A method for testing the sealing performance of a mechanical penetration piece is characterized by comprising the following steps: the mechanical penetration piece sealing performance testing method comprises the following steps:

sealing the device with a test blind plate;

changing the internal pressure of the sealed sealing device of the test blind plate to the pressure required by the test;

acquiring pressure and temperature data in a sealing device;

judging whether the sealing performance of the sealing device is qualified or not;

removing the test blind plate, and sealing the sealing device by using a mechanical penetration piece;

changing the internal pressure of a sealing device sealed by the mechanical penetration piece to the pressure required by the test;

acquiring pressure and temperature data in the sealing device again;

and calculating the leakage rate of the mechanical penetration piece in unit hour according to the pressure and temperature data in the sealing device acquired before and after.

2. The mechanical penetration seal test method of claim 1, wherein: the method for testing the sealing performance of the mechanical penetration piece further comprises the step of testing the air pressure value and the temperature and the humidity outside the sealing device through the temperature and the humidity after the mechanical penetration piece is sealed in the sealing device.

3. The mechanical penetration seal test method of claim 1, wherein: the method for acquiring the pressure and temperature data in the sealing device specifically comprises the following steps: and stopping pumping/inflating the sealing device, and acquiring the pressure and temperature change data of the sealing device in real time through signals transmitted by a pressure transmitter and a temperature sensor in the sealing device after the temperature and the pressure in the sealing device are stable.

4. The mechanical penetration seal test method of claim 1, wherein: the specific steps of changing the internal pressure of the sealed sealing device of the test blind plate to the pressure required by the test are as follows: and (3) pumping/inflating the sealing device through the air source system until the pressure in the sealing device reaches the set test negative pressure/test positive pressure, and closing a valve on a pipeline communicated with the sealing device by the air source system.

5. A mechanical penetration seal test method according to any one of claims 1 to 4, wherein: the specific leakage rate of the mechanical penetration piece in unit hour is calculated by the pressure and temperature data in the sealing device obtained before and after the leakage rate is as follows: the leakage rate per hour of the mechanical penetration was calculated from the following data:

wherein Tf is the leakage rate in unit hour, T is the duration of detection, PN is the pressure value when the test blind plate is closed, TN is the temperature when the test blind plate is closed, T1 is the temperature when the mechanical penetrating piece is sealed, and P1 is the pressure value when the mechanical penetrating piece is sealed.

6. The mechanical penetration seal test method of claim 5, wherein: after the mechanical penetration piece is sealed in the sealing device, the air pressure value and the temperature and humidity outside the sealing device are measured through a temperature and humidity test; and after the mechanical penetration piece seals the sealing device, acquiring external air pressure data and temperature and humidity data of the sealing device through an atmospheric pressure sensor and a temperature and humidity sensor which are arranged outside the sealing device.

7. A mechanical penetration seal testing system, the mechanical penetration seal testing system comprising:

the sealing device is used for being connected with the mechanical penetrating piece and creating a relatively sealed environment;

the test blind plate is used for being connected with the sealing device and testing the sealing performance of the sealing device;

the air source system is used for pumping/inflating the sealing device;

the data acquisition system is used for acquiring various data;

and the electrical system is used for controlling the air source system and the data acquisition system.

8. The mechanical penetration seal testing system of claim 7, wherein: the data acquisition system comprises a pressure transmitter and a temperature sensor which are arranged in the sealing device, and an atmospheric pressure sensor and a temperature and humidity sensor which are arranged outside the sealing device.

9. The mechanical penetration seal testing system of claim 7, wherein: and a pipeline regulating and controlling device is arranged in the air source system and is used for sealing a pipeline communicated with the sealing device after the air source system is closed.

Background

The research on the sealing performance test of the penetration piece in the nuclear power industry is mostly electric penetration pieces, no method for testing the sealing performance of the mechanical penetration piece exists at present, the sealing performance of the mechanical penetration piece is very important for ensuring the safety of nuclear power engineering, and the sealing performance test is required to verify that the sealing performance of the penetration piece meets the requirement. The sealing performance of the mechanical penetration affects the prevention of leakage, leakage and radioactive waste water, and thus, improvement is required.

Disclosure of Invention

In view of the above-mentioned shortcomings of the existing tightness testing method and system, the invention provides a method and system for testing the tightness of a mechanical penetration piece, which can achieve the effects of conveniently and conveniently measuring the tightness of the mechanical penetration piece, further preventing leakage and reducing the generation amount of radioactive wastewater.

In order to achieve the purpose, the invention adopts the following technical scheme:

a mechanical penetration seal testing method, comprising the steps of:

sealing the device with a test blind plate;

changing the internal pressure of the sealed sealing device of the test blind plate to the pressure required by the test;

acquiring pressure and temperature data in a sealing device;

judging whether the sealing performance of the sealing device is qualified or not;

removing the test blind plate, and sealing the sealing device by using a mechanical penetration piece;

changing the internal pressure of a sealing device sealed by the mechanical penetration piece to the pressure required by the test;

acquiring pressure and temperature data in the sealing device again;

and calculating the leakage rate of the mechanical penetration piece in unit hour according to the pressure and temperature data in the sealing device acquired before and after.

According to one aspect of the invention, the method for testing the sealing performance of the mechanical penetration piece further comprises the step of testing the air pressure value and the temperature and humidity outside the sealing device through the temperature and humidity after the mechanical penetration piece seals the sealing device.

According to one aspect of the invention, the acquiring of the pressure and temperature data in the sealing device is specifically: and stopping pumping/inflating the sealing device, and acquiring the pressure and temperature change data of the sealing device in real time through signals transmitted by a pressure transmitter and a temperature sensor in the sealing device after the temperature and the pressure in the sealing device are stable.

According to one aspect of the invention, the step of changing the internal pressure of the sealing device for sealing the test blind plate to the pressure required by the test is specifically as follows: and (3) pumping/inflating the sealing device through the air source system until the pressure in the sealing device reaches the set test negative pressure/test positive pressure, and closing a valve on a pipeline communicated with the sealing device by the air source system.

According to one aspect of the invention, the leakage rate of the mechanical penetrating part per hour calculated by the pressure and temperature data in the sealing device obtained before and after the sealing device is specifically as follows: the leakage rate per hour of the mechanical penetration was calculated from the following data:

wherein Tf is the leakage rate in unit hour, T is the duration of detection, PN is the pressure value when the test blind plate is closed, TN is the temperature when the test blind plate is closed, T1 is the temperature when the mechanical penetrating piece is sealed, and P1 is the pressure value when the mechanical penetrating piece is sealed.

According to one aspect of the invention, after the mechanical penetration piece is sealed in the sealing device, the air pressure value and the temperature and humidity outside the sealing device are measured through a temperature and humidity test; and after the mechanical penetration piece seals the sealing device, acquiring external air pressure data and temperature and humidity data of the sealing device through an atmospheric pressure sensor and a temperature and humidity sensor which are arranged outside the sealing device.

A mechanical penetration seal testing system, the mechanical penetration seal testing system comprising:

the sealing device is used for being connected with the mechanical penetrating piece and creating a relatively sealed environment;

the test blind plate is used for being connected with the sealing device and testing the sealing performance of the sealing device;

the air source system is used for pumping/inflating the sealing device;

the data acquisition system is used for acquiring various data;

and the electrical system is used for controlling the air source system and the data acquisition system.

According to one aspect of the invention, the data acquisition system comprises a pressure transmitter and a temperature sensor arranged in the sealing device, and an atmospheric pressure sensor and a temperature and humidity sensor arranged outside the sealing device.

According to one aspect of the invention, a pipeline regulating device is arranged in the air source system and used for sealing the pipeline communicated with the sealing device after the air source system is closed.

The implementation of the invention has the advantages that:

the invention provides a method for testing the sealing performance of a mechanical penetration piece, which comprises the following steps: sealing the device with a test blind plate; changing the internal pressure of the sealed sealing device of the test blind plate to the pressure required by the test; acquiring pressure and temperature data in a sealing device; judging whether the sealing performance of the sealing device is qualified or not; removing the test blind plate, and sealing the sealing device by using a mechanical penetration piece; changing the internal pressure of a sealing device sealed by the mechanical penetration piece to the pressure required by the test; acquiring pressure and temperature data in the sealing device again; and calculating the leakage rate of the mechanical penetration piece in unit hour according to the pressure and temperature data in the sealing device acquired before and after. A mechanical penetration seal testing system, the mechanical penetration seal testing system comprising: the device comprises a sealing device, a test blind plate, an air source system, a data acquisition system and an electrical system. Can reach the convenient measuring machinery penetration piece the sealing performance, and then prevent to run and fall the effect of water clock and reduction radioactive waste water production volume.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a flow chart illustrating the steps of a method for testing the sealability of a mechanical penetration assembly according to the present invention;

fig. 2 is a schematic structural diagram of a mechanical penetration test system according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

1-2, a mechanical penetration seal test method, comprising the steps of:

s1, sealing the sealing device by using a test blind plate;

s2, changing the internal pressure of the sealed sealing device of the test blind plate to the pressure required by the test;

in this embodiment, the step of changing the internal pressure of the sealed sealing device of the test blind plate to the pressure required by the test is specifically as follows: and (3) pumping/inflating the sealing device through the air source system until the pressure in the sealing device reaches the set test negative pressure/test positive pressure, and closing a valve on a pipeline communicated with the sealing device by the air source system.

S3, acquiring pressure and temperature data in the sealing device;

in this embodiment, the acquiring of the pressure and temperature data in the sealing device specifically includes: and stopping pumping/inflating the sealing device, and acquiring the pressure and temperature change data of the sealing device in real time through signals transmitted by a pressure transmitter and a temperature sensor in the sealing device after the temperature and the pressure in the sealing device are stable.

In this embodiment, after the mechanical penetration member seals the sealing device, external air pressure data and temperature and humidity data of the sealing device are acquired by an atmospheric pressure sensor and a temperature and humidity sensor which are disposed outside the sealing device. S4, judging whether the sealing performance of the sealing device is qualified;

s5, removing the test blind plate, and sealing the sealing device by using a mechanical penetration piece;

s6, changing the internal pressure of the sealing device sealed by the mechanical penetration piece to the pressure required by the test;

in this embodiment, the step of changing the internal pressure of the sealing device sealed by the mechanical penetration assembly to the pressure required by the test is specifically as follows: and (3) pumping/inflating the sealing device through the air source system until the pressure in the sealing device reaches the set test negative pressure/test positive pressure, and closing a valve on a pipeline communicated with the sealing device by the air source system.

S7, acquiring pressure and temperature data in the sealing device again;

in this embodiment, the acquiring of the pressure and temperature data in the sealing device specifically includes: and stopping pumping/inflating the sealing device, and acquiring the pressure and temperature change data of the sealing device in real time through signals transmitted by a pressure transmitter and a temperature sensor in the sealing device after the temperature and the pressure in the sealing device are stable.

And S8, calculating the leakage rate of the mechanical penetration piece in unit hour according to the pressure and temperature data in the sealing device acquired before and after.

In this embodiment, the specific calculation of the leakage rate per hour of the mechanical penetration piece from the pressure and temperature data in the sealing device obtained before and after the calculation is as follows: the leakage rate per hour of the mechanical penetration was calculated from the following data:

wherein Tf is the leakage rate in unit hour, T is the duration of detection, PN is the pressure value when the test blind plate is closed, TN is the temperature when the test blind plate is closed, T1 is the temperature when the mechanical penetrating piece is sealed, and P1 is the pressure value when the mechanical penetrating piece is sealed.

Hourly leakage rate, T, defined as hourly leakage rate_fThe ratio of the leakage F of the sealed chamber at normal operating conditions (pressure and temperature) for 1h to the volume of the sealed chamber is given. Namely T_f＝F/V。

The following table is a classification of the sealed cells according to their hourly leakage rate:

calculating the leakage rate, and obtaining a test conclusion according to the classification of the leakage rate per hour of the sealed chamber through the upper surface: the mechanical penetration seal conforms to the leakage rate specified for several stages of sealed chambers.

A mechanical penetration seal testing system, the mechanical penetration seal testing system comprising:

a sealing device 6 for connecting with the mechanical penetration piece 2 and creating a relatively sealed environment;

the test blind plate 1 is used for being connected with the sealing device 6 and testing the sealing performance of the sealing device;

the air source system 9 is used for pumping/inflating the sealing device 6;

the data acquisition system 10 is used for acquiring various data;

and an electrical system 11 for controlling the gas supply system 9 and the data acquisition system 10.

According to one aspect of the invention, the data acquisition system comprises a pressure transmitter 3 and a temperature sensor 4 disposed within a seal 6, and an atmospheric pressure sensor 12 and a temperature and humidity sensor 5 disposed outside the seal.

According to one aspect of the invention, a pipeline regulating device 7 is arranged in the gas source system 9, and the pipeline regulating device 7 is used for sealing the pipeline communicated with the sealing device 6 after the gas source system 9 is closed.

The implementation of the invention has the advantages that:

the invention provides a method for testing the sealing performance of a mechanical penetration piece, which comprises the following steps: sealing the device with a test blind plate; changing the internal pressure of the sealed sealing device of the test blind plate to the pressure required by the test; acquiring pressure and temperature data in a sealing device; judging whether the sealing performance of the sealing device is qualified or not; removing the test blind plate, and sealing the sealing device by using a mechanical penetration piece; changing the internal pressure of a sealing device sealed by the mechanical penetration piece to the pressure required by the test; acquiring pressure and temperature data in the sealing device again; and calculating the leakage rate of the mechanical penetration piece in unit hour according to the pressure and temperature data in the sealing device acquired before and after. A mechanical penetration seal testing system, the mechanical penetration seal testing system comprising: the device comprises a sealing device, a test blind plate, an air source system, a data acquisition system and an electrical system. Can reach the convenient measuring machinery penetration piece the sealing performance, and then prevent to run and fall the effect of water clock and reduction radioactive waste water production volume.

The mutual correlation among all the inspection instruments is realized through analysis software, the operation is simple, and the leakage rate of the sealing device can be calculated through the generated real-time curve and the formula 1 only by using the common inspection instruments, namely the leakage rate of the mechanical penetrating piece is measured. The test method has the function of simultaneously measuring the leakage rate of a plurality of mechanical penetration pieces by adding the sealing device. The problem of the gas tightness test acceptance of mechanical penetration piece is solved, under the reliable prerequisite of sealing device, through the direct sealing device of mechanical penetration piece, the leakage rate of direct measurement sealing device has indirectly measured the leakage rate of mechanical penetration piece.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed herein are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.