CN111421312A - Pneumatic screwing control system for thermocouple mechanical seal - Google Patents
Pneumatic screwing control system for thermocouple mechanical seal Download PDFInfo
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- CN111421312A CN111421312A CN202010259743.6A CN202010259743A CN111421312A CN 111421312 A CN111421312 A CN 111421312A CN 202010259743 A CN202010259743 A CN 202010259743A CN 111421312 A CN111421312 A CN 111421312A
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- way valve
- pneumatic
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- 230000001105 regulatory effect Effects 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 10
- 239000003921 oil Substances 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 3
- 239000010687 lubricating oil Substances 0.000 claims description 3
- 230000003584 silencer Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 10
- 238000012423 maintenance Methods 0.000 abstract description 7
- 230000005855 radiation Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Material Composition (AREA)
Abstract
The disclosure belongs to the technical field of nuclear power maintenance, and particularly relates to a pneumatic screwing control system for a thermocouple mechanical seal. The control device of this disclosed embodiment is judging the follow the encoder acquires under the condition that angle data does not accord with first preset condition, through adjusting first electric proportional valve or the aperture of second electric proportional valve adjusts the pneumatic rotation speed of twisting the instrument, until control device judges to follow the encoder acquires that speed data accords with first preset condition, can effectively ensure the work efficiency and the maintenance quality of mechanical seal installation according to the accurate control pneumatic rotation of twisting the instrument rotational speed of preset condition, reduces the radiation dose that the maintainer received. In addition, the output end of the pneumatic screwing device can be controlled to rotate towards two different directions, and different installation operation requirements can be flexibly adapted.
Description
Technical Field
The invention belongs to the technical field of nuclear power maintenance, and particularly relates to a pneumatic screwing control system for a thermocouple mechanical seal.
Background
The reactor pressure vessel belongs to the key important equipment of a nuclear power station, the mechanical seal positioned at the top of the pressure vessel belongs to a primary circuit pressure boundary, and the seal reliability of the mechanical seal directly relates to the nuclear safety. The mechanical seal has extremely narrow working space, extremely strong radioactive rays exist in the environment and the requirement on installation precision is extremely high. In order to ensure the installation quality and the working efficiency of the mechanical seal, the accuracy of screwing the mechanical seal of the thermocouple needs to be improved, so that the working efficiency and the maintenance quality of the installation of the mechanical seal are ensured, and the radiation dose borne by a maintainer is reduced.
Disclosure of Invention
To overcome the problems in the related art, a pneumatic screwing control system for a mechanical seal of a thermocouple is provided.
According to an aspect of the embodiments of the present disclosure, there is provided a pneumatic screwing control system for a mechanical seal of a thermocouple, including: the pneumatic screwing tool comprises a pneumatic screwing tool, an encoder, a two-position five-way valve, a first electric proportional valve, a second electric proportional valve, an air source and a control device;
The two-position five-way valve comprises a first interface, a second interface, a third interface, a fourth interface and a fifth interface, the first interface is connected with a first gas transmission port of the pneumatic screwing tool, the second interface is connected with a second gas transmission port of the pneumatic screwing tool, the third interface is connected with the first electric proportional valve, the fourth interface is connected with the second electric proportional valve, and the fifth interface is connected with the gas source;
When the two-position five-way valve is in a first working mode, the output end of the pneumatic rotating tool rotates towards a first direction, and when the two-position five-way valve is in a second working mode, the output end of the pneumatic rotating tool rotates towards a second direction opposite to the first direction;
The encoder is connected with the pneumatic screwing tool and used for acquiring angle data reflecting the rotation angle of the pneumatic screwing tool;
The control device is respectively connected with the encoder, the first electric proportional valve and the second electric proportional valve;
And under the condition that the angle data acquired from the encoder is judged not to accord with the first preset condition, the control device adjusts the rotation speed of the pneumatic screwing tool by adjusting the opening degree of the first electric proportional valve or the second electric proportional valve until the control device judges that the angle data acquired from the encoder accords with the first preset condition.
In one possible implementation, the pneumatic screwing control system for thermocouple mechanical seal further includes: a pressure sensor and a third electric proportional valve;
The pressure sensor is connected between the two-position five-way valve and the air source and is used for collecting pressure data reflecting the air pressure input into the two-position five-way valve;
The third electric proportional valve is connected between the pressure sensor and the gas source;
The control device is respectively connected with the pressure sensor and the third electric proportional valve;
And under the condition that the pressure data acquired from the pressure sensor is judged not to accord with the second preset condition, the control device adjusts the output torque of the pneumatic screwing tool by adjusting the opening degree of the third electric proportional valve until the control device judges that the pressure data acquired from the pressure sensor accords with the second preset condition.
In one possible implementation, the pneumatic screwing control system for thermocouple mechanical seal further includes: a two-position two-way valve;
The two-position two-way valve is connected between the two-position five-way valve and the air source;
Under the condition that the two-position two-way valve is at the upper position, the air path between the two-position five-way valve and the air source is ventilated;
And under the condition that the two-position two-way valve is at the lower position, the gas path between the two-position five-way valve and the gas source is disconnected.
In one possible implementation, the pneumatic screwing control system for thermocouple mechanical seal further includes: an air filter;
And the air filter is connected between the two-position two-way valve and the air source and used for filtering air input into the two-position two-way valve.
In one possible implementation, the pneumatic screwing control system for thermocouple mechanical seal further includes: a regulating valve and a pressure gauge;
The regulating valve and the pressure gauge are sequentially connected between the two-position two-way valve and the air source, the pressure gauge is used for detecting and displaying air pressure input into the regulating valve, and the regulating valve can regulate the air pressure input into the two-position two-way valve.
In one possible implementation, the pneumatic screwing control system for thermocouple mechanical seal further includes: an oil lubricator;
The oil lubricator is connected between the two-position two-way valve and the air source and used for bringing lubricating oil into a gas pipeline through compressed air to lubricate mechanical parts in the gas circuit.
In one possible implementation, the pneumatic screwing control system for thermocouple mechanical seal further includes: a stop valve;
The stop valve is connected between the oil lubricator and the air source, and the stop valve can control the on-off of the air source output air path.
In one possible implementation, the pneumatic screwing control system for thermocouple mechanical seal further includes: a first muffler;
The first silencer is connected with the first electric proportional valve and used for outputting noise of the first electric proportional valve.
In one possible implementation, the pneumatic screwing control system for thermocouple mechanical seal further includes: a second muffler;
The second muffler is connected with the second electric proportional valve and used for outputting noise of the second electric proportional valve.
In one possible implementation, the control device further includes a display module;
The display module is used for displaying the data acquired by the control device.
The invention has the beneficial effects that: the control device of this disclosed embodiment is judging the follow the encoder acquires under the condition that angle data does not accord with first preset condition, through adjusting first electric proportional valve or the aperture of second electric proportional valve adjusts the pneumatic rotation speed of twisting the instrument, until control device judges to follow the encoder acquires that speed data accords with first preset condition, can effectively ensure the work efficiency and the maintenance quality of mechanical seal installation according to the accurate control pneumatic rotation of twisting the instrument rotational speed of preset condition, reduces the radiation dose that the maintainer received. In addition, the output end of the pneumatic screwing device can be controlled to rotate towards two different directions, and different installation operation requirements can be flexibly adapted.
Drawings
FIG. 1 is a schematic diagram illustrating a pneumatic screw control system for a thermocouple mechanical seal according to an exemplary embodiment.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
FIG. 1 is a schematic diagram illustrating a pneumatic screw control system for a thermocouple mechanical seal according to an exemplary embodiment. As shown in fig. 1, the pneumatic screwing control system for thermocouple mechanical seal comprises: the pneumatic screwing tool comprises a pneumatic screwing tool 1, an encoder 2, a two-position five-way valve 3, a first electric proportional valve 4, a second electric proportional valve 5, an air source 17 and a control device 6;
In the embodiment of the present disclosure, the control device 6 may be generally represented as a master device that controls the starting, speed regulation, braking, and reversing of the motor according to a predetermined setting, and the control device 6 may include, for example, a central processing unit, a single chip, and the like, and the type of the control device 6 is not limited in the embodiment of the present disclosure. The pneumatic screwing tool 1 may be represented as a pneumatic actuator that drives an output shaft to perform a reciprocating rotational motion within a certain angular range by using compressed air, and the type of the pneumatic screwing tool 1 is not limited in the embodiment of the present disclosure. The air source 17 is shown as a device for outputting compressed air, the air source 17 may be, for example, an air pump, etc., and the type of the air source 17 is not limited in the embodiment of the disclosure.
As an example of the present embodiment, the two-position five-way valve 3 may include a first port a, a second port B, a third port C, a fourth port E, and a fifth port D, the first port may be connected to a first gas transmission port of the pneumatic screwing tool 1, the second port is connected to a second gas transmission port of the pneumatic screwing tool 1, the third port is connected to the first electric proportional valve 4, the fourth port is connected to the second electric proportional valve 5, and the fifth port is connected to the gas source 17;
When the two-position five-way valve 3 is in the first operation mode (e.g., the upper position), the air source 17 inputs compressed air to the first air transmission port of the pneumatic screwing tool 1 through the fifth port and the first port, so that the output end of the pneumatic screwing tool 1 rotates in the first direction (e.g., the clockwise direction), and the pneumatic screwing tool 1 can exhaust air through the second air transmission port via the second port and the fourth port; in the second operating mode (for example, the lower position), the air source 17 inputs compressed air to the second air transmission port of the pneumatic screwing tool 1 through the fifth port and the second port, so that the output end of the pneumatic screwing tool 1 rotates in the second direction (for example, the counterclockwise direction), and the pneumatic screwing tool 1 can exhaust air through the first air transmission port via the first port and the third port.
The encoder 2 can be connected with the pneumatic screwing tool 1, and the encoder 2 can be used for acquiring angle data reflecting the rotation angle of the pneumatic screwing tool 1;
The control device 6 can be respectively connected with the encoder 2, the first electric proportional valve 4 and the second electric proportional valve 5;
The control device 6 adjusts the output torque of the pneumatic screwing tool 1 by adjusting the opening degree of the first electric proportional valve 4 or the second electric proportional valve 5 under the condition that the angle data acquired from the encoder 2 is judged not to accord with the first preset condition until the control device 6 judges that the angle data acquired from the encoder 2 accords with the first preset condition.
For example, the control device 6 may obtain angle data from the encoder 2, the control device 6 may determine a speed value according to the angle data and the corresponding relationship between the angle and the speed, the control device 6 may determine the relationship between the determined speed value and a preset speed threshold, and when the control device 6 determines that the speed value is lower than the preset speed threshold (an example that the angle data does not meet the first preset condition), control commands can be issued to the first electric proportional valve 4 and/or the second electric proportional valve 5, to increase the opening of the first electric proportional valve 4 and/or the second electric proportional valve 5 to increase the output speed of the pneumatic screwing tool 1, the control device 6 may continue the above operations until the control device 6 judges that the determined speed value is equal to the preset speed threshold (an example of the angle data meeting the first preset condition).
The control device of this disclosed embodiment is judging the follow the encoder acquires under the condition that angle data is not conform to first preset condition, through adjusting first electric proportional valve or the aperture of second electric proportional valve adjusts pneumatic screwing tool's speed, until control device judges to follow the encoder acquires that speed data accords with first preset condition, and pneumatic screwing tool rotational speed is twisted in more accurate control from this, effectively ensures mechanical seal installation's work efficiency and maintenance quality, reduces the radiation dose that the maintainer received. In addition, the output end of the pneumatic screwing device can be controlled to rotate towards two different directions, and different installation operation requirements can be flexibly adapted.
In one possible implementation, the pneumatic screwing control system for thermocouple mechanical seal may further include: a pressure sensor 9 and a third electric proportional valve 10.
In the embodiment of the present disclosure, the pressure sensor may be represented as a device or an apparatus capable of sensing a pressure signal and converting the pressure signal into a usable output electrical signal according to a certain rule, and the type of the pressure sensor is not limited in the embodiment of the present disclosure.
The pressure sensor 9 can be connected between the two-position five-way valve 3 and the air source 17, and the pressure sensor 9 is used for collecting pressure data reflecting the air pressure input into the two-position five-way valve 3;
The third electric proportional valve 10 is connected between the pressure sensor 9 and the air source 17;
The control device 6 can be connected to a pressure sensor 9 and a third electric proportional valve 10, respectively;
Under the condition that the control device 6 judges that the pressure data acquired from the pressure sensor 9 do not accord with the second preset condition, the air pressure input into the two-position five-way valve 3 is adjusted by adjusting the opening degree of the third electric proportional valve 10 until the control device 6 judges that the pressure data acquired from the pressure sensor 9 accord with the second preset condition.
For example, the control device 6 may obtain pressure data from the pressure sensor 9, and may determine a magnitude relationship between a value of the pressure data and a preset pressure threshold, and the control device 6 may increase the air pressure input to the two-position five-way valve 3 by adjusting the opening degree of the third electric proportional valve 10 to increase the output torque of the pneumatic screwing tool 1 when determining that the value of the pressure data is smaller than the preset pressure threshold (an example that the pressure data does not meet a second preset condition). The control device 6 may repeat the above operation until the value of the acquired pressure data is equal to the preset pressure threshold value (an example in which the pressure data meets the second preset condition).
Therefore, the rotating speed of the pneumatic screwing tool can be accurately controlled according to the preset condition, the output torque of the pneumatic screwing tool can be accurately controlled according to the preset condition, the working efficiency and the maintenance quality of mechanical seal installation are further effectively guaranteed, and the radiation dose received by a maintainer is reduced.
In one possible implementation, the pneumatic screwing control system for thermocouple mechanical seal may further include: a two-position two-way valve; the two-position two-way valve can be connected between the two-position five-way valve 3 and the air source 17; when the two-position two-way valve is at the upper position, the air path between the two-position five-way valve 3 and the air source 17 is ventilated; and under the condition that the two-position two-way valve is at the lower position, the gas path between the two-position five-way valve 3 and the gas source 17 is disconnected. Therefore, the on-off of the air path of the air source 17 input into the two-position five-way valve 3 can be controlled through the two-position two-way valve as required.
In one possible implementation, the pneumatic screwing control system for thermocouple mechanical seal further comprises: an air filter 12; the air filter 12 is connected between the two-position two-way valve and the air source 17, and is used for filtering air input into the two-position two-way valve.
In one possible implementation, the pneumatic screwing control system for thermocouple mechanical seal further comprises: a regulating valve 13 and a pressure gauge 14; the regulating valve 13 and the pressure gauge 14 are sequentially connected between the two-position two-way valve 11 and the air source 17, the pressure gauge 14 is used for detecting and displaying air pressure input into the regulating valve 13, and the regulating valve 13 can regulate the air pressure input into the two-position two-way valve 11. The maintainer can compare the air pressure value displayed by the pressure gauge 14 with the safe air pressure value, and can adjust the air pressure input into the two-position two-way valve 11 through the adjusting valve 13 according to the comparison result.
In one possible implementation, the pneumatic screwing control system for thermocouple mechanical seal may further include: an oil lubricator 15; the oil lubricator 15 is connected between the two-position two-way valve 11 and the air source 17, and the oil lubricator 15 is used for bringing lubricating oil into an air pipeline through compressed air to lubricate mechanical parts in the air pipeline.
In one possible implementation, the pneumatic screwing control system for thermocouple mechanical seal further comprises: a shut-off valve 16; the stop valve 16 can be connected between the oil lubricator 15 and the air source 17, and the stop valve 16 can control the on-off of the output air path of the air source 17.
In one possible implementation, the pneumatic screwing control system for thermocouple mechanical seal further comprises: a first muffler 7 and a second muffler 8; the first silencer 7 is connected with the first electric proportional valve 4 and is used for outputting noise of the first electric proportional valve 4; the second muffler 8 is connected to the second electric proportional valve 5 for outputting noise of the second electric proportional valve 5. In this way, the noise generated by the control system can be effectively reduced.
In a possible implementation, the control device 6 further comprises a display module; the display module may be used to display the data acquired by the control device 6. For example, the display module may display the rotation speed and the output torque of the pneumatic screwing tool 1, so that the service personnel may monitor the working state of the pneumatic screwing tool 1 more intuitively.
In an example, the control device 6 may further include a CPU, an a/D acquisition module, a D/a output module, a communication module, and a power module, wherein the CPU may be respectively connected to the a/D acquisition module, the D/a output module, the communication module, and the power module, as shown in fig. 1, the CPU may respectively acquire angle data and pressure data from the encoder 2 and the pressure sensor 9 through the a/D acquisition module, and the CPU may further send control instructions to the first electric proportional valve 4, the second electric proportional valve 5, and the third electric proportional valve 10 through the D/a output module to control the opening degrees of the first electric proportional valve 4, the second electric proportional valve 5, and the third electric proportional valve 10.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (10)
1. A pneumatic screwing control system for thermocouple mechanical seals, characterized in that it comprises: the pneumatic screwing tool comprises a pneumatic screwing tool, an encoder, a two-position five-way valve, a first electric proportional valve, a second electric proportional valve, an air source and a control device;
The two-position five-way valve comprises a first interface, a second interface, a third interface, a fourth interface and a fifth interface, the first interface is connected with a first gas transmission port of the pneumatic screwing tool, the second interface is connected with a second gas transmission port of the pneumatic screwing tool, the third interface is connected with the first electric proportional valve, the fourth interface is connected with the second electric proportional valve, and the fifth interface is connected with the gas source;
When the two-position five-way valve is in a first working mode, the output end of the pneumatic rotating tool rotates towards a first direction, and when the two-position five-way valve is in a second working mode, the output end of the pneumatic rotating tool rotates towards a second direction opposite to the first direction;
The encoder is connected with the pneumatic screwing tool and used for acquiring angle data reflecting the rotation angle of the pneumatic screwing tool;
The control device is respectively connected with the encoder, the first electric proportional valve and the second electric proportional valve;
And under the condition that the angle data acquired from the encoder is judged not to accord with the first preset condition, the control device adjusts the rotating speed of the pneumatic screwing tool by adjusting the opening degree of the first electric proportional valve and/or the second electric proportional valve until the control device judges that the angle data acquired from the encoder accords with the first preset condition.
2. The pneumatic screwing control system for thermocouple mechanical seals according to claim 1, further comprising: a pressure sensor and a third electric proportional valve;
The pressure sensor is connected between the two-position five-way valve and the air source and is used for collecting pressure data reflecting the air pressure input into the two-position five-way valve;
The third electric proportional valve is connected between the pressure sensor and the gas source;
The control device is respectively connected with the pressure sensor and the third electric proportional valve;
And under the condition that the pressure data acquired from the pressure sensor is judged not to accord with the second preset condition, the control device adjusts the output torque of the pneumatic screwing tool by adjusting the opening degree of the third electric proportional valve until the control device judges that the pressure data acquired from the pressure sensor accords with the second preset condition.
3. The pneumatic screwing control system for thermocouple mechanical seals according to claim 1, further comprising: a two-position two-way valve;
The two-position two-way valve is connected between the two-position five-way valve and the air source;
Under the condition that the two-position two-way valve is at the upper position, the air path between the two-position five-way valve and the air source is ventilated;
And under the condition that the two-position two-way valve is at the lower position, the gas path between the two-position five-way valve and the gas source is disconnected.
4. The pneumatic screwing control system for thermocouple mechanical seals according to claim 3, further comprising: an air filter;
And the air filter is connected between the two-position two-way valve and the air source and used for filtering air input into the two-position two-way valve.
5. The pneumatic screwing control system for thermocouple mechanical seals according to claim 3, further comprising: a regulating valve and a pressure gauge;
The regulating valve and the pressure gauge are sequentially connected between the two-position two-way valve and the air source, the pressure gauge is used for detecting and displaying air pressure input into the regulating valve, and the regulating valve can regulate the air pressure input into the two-position two-way valve.
6. The pneumatic screwing control system for thermocouple mechanical seals according to claim 3, further comprising: an oil lubricator;
The oil lubricator is connected between the two-position two-way valve and the air source and used for bringing lubricating oil into a gas pipeline through compressed air to lubricate mechanical parts in the gas circuit.
7. The pneumatic screwing control system for thermocouple mechanical seals according to claim 6, further comprising: a stop valve;
The stop valve is connected between the oil lubricator and the air source, and the stop valve can control the on-off of the air source output air path.
8. The pneumatic screwing control system for thermocouple mechanical seals according to claim 1, further comprising: a first muffler;
The first silencer is connected with the first electric proportional valve and used for outputting noise of the first electric proportional valve.
9. The pneumatic screwing control system for thermocouple mechanical seals according to claim 1, further comprising: a second muffler;
The second muffler is connected with the second electric proportional valve and used for outputting noise of the second electric proportional valve.
10. The pneumatic screwing control system for thermocouple mechanical seals according to claim 1, characterized in that said control means further comprise a display module;
The display module is used for displaying the data acquired by the control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010259743.6A CN111421312A (en) | 2020-04-03 | 2020-04-03 | Pneumatic screwing control system for thermocouple mechanical seal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010259743.6A CN111421312A (en) | 2020-04-03 | 2020-04-03 | Pneumatic screwing control system for thermocouple mechanical seal |
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| CN111421312A true CN111421312A (en) | 2020-07-17 |
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| CN202010259743.6A Pending CN111421312A (en) | 2020-04-03 | 2020-04-03 | Pneumatic screwing control system for thermocouple mechanical seal |
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| CN212946346U (en) * | 2020-04-03 | 2021-04-13 | 中核核电运行管理有限公司 | Pneumatic screwing control system for thermocouple mechanical seal |
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2020
- 2020-04-03 CN CN202010259743.6A patent/CN111421312A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20030029230A1 (en) * | 2001-05-18 | 2003-02-13 | Murphy Robert J. | Oil well bore hole filter cake breaker fluid test apparatus and method |
| CN201788084U (en) * | 2010-08-19 | 2011-04-06 | 杭州沃镭科技有限公司 | Pneumatic electromagnetic valve comprehensive performance detecting device based on PC control |
| CN102019547A (en) * | 2010-11-10 | 2011-04-20 | 上海诺玛液压系统有限公司 | Tool used for press fitting of reverse mechanism on load sensitive proportional multiway valve |
| CN103246250A (en) * | 2013-03-22 | 2013-08-14 | 浙江理工大学 | Remote monitoring device for glass tempering furnace |
| US20170335866A1 (en) * | 2016-05-19 | 2017-11-23 | China Pneumatic Corporation | Apparatus and control system of programmable air servo motor |
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