CN212779810U - Nuclear power plant check valve sealing performance detects gasbag plugging device - Google Patents
Nuclear power plant check valve sealing performance detects gasbag plugging device Download PDFInfo
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- CN212779810U CN212779810U CN202021222004.1U CN202021222004U CN212779810U CN 212779810 U CN212779810 U CN 212779810U CN 202021222004 U CN202021222004 U CN 202021222004U CN 212779810 U CN212779810 U CN 212779810U
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- air bag
- check valve
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- sealing
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Abstract
The utility model discloses a check valve sealing performance detection air bag plugging device for a nuclear power plant, which comprises a flange, an air bag and a sealing baffle plate, wherein the sealing baffle plate is fixedly connected with the flange; an anti-loosening assembly for preventing the air bag from loosening is arranged between the air bag and the sealing baffle and comprises an air bag U-shaped buckle, a chain and a hanging ring, the air bag U-shaped buckle is fixed on the air bag, the hanging ring is detachably mounted on the sealing baffle, one end of the chain is connected to the air bag U-shaped buckle, and the other end of the chain is connected with the hanging ring through a horseshoe buckle; the air bag is connected with an injection pipeline for injecting air or liquid into the air bag. The device realizes the on-line measuring to nuclear power plant's check valve sealing performance through setting up gasbag, seal baffle, flange and locking loose subassembly, need not to demolish the check valve that awaits measuring from the working line, realizes accurate, high efficiency and the safety inspection of nuclear power plant's check valve sealing performance.
Description
Technical Field
The utility model belongs to the technical field of the pipeline part, concretely relates to check valve sealing performance of nuclear power plant detects gasbag plugging device.
Background
The check valve is used for controlling the reliable flow of fluid media, the valve clack is jacked open by the downstream media by the flowing pressure of the downstream media to smoothly flow, and the media are blocked by the valve clack when flowing back, so that the purpose of preventing the back flow is achieved. A swing check valve or a swash plate check valve is mostly adopted in a loop pressure boundary and an auxiliary system of a nuclear power plant and is used for being connected with pipelines with different calibers, the check valve is located at an important position in the pipelines, the sealing performance of the check valve directly influences the leakage rate of a loop coolant of the nuclear power plant, and the check valve is significant to safe and stable operation of the nuclear power plant. During overhaul, leakage rate test or disassembly maintenance work needs to be carried out on the valve regularly, a loop or an auxiliary system where the check valve is located is a high-pressure system and generally adopts a welding connection mode, the method for verifying the tightness of the check valve in the prior art visually verifies the tightness through a blue oil test, the test method is inaccurate, and the leakage rate of the check valve cannot be determined quantitatively.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that not enough to above-mentioned prior art provides a check valve sealing performance of nuclear power plant detects gasbag plugging device, and the device realizes the on-line measuring to check valve sealing performance of nuclear power plant through setting up gasbag, seal baffle, flange and locking loose subassembly, need not to demolish the check valve that awaits measuring from the working line, realizes accuracy, high efficiency and the safety inspection of check valve sealing performance of nuclear power plant.
In order to solve the technical problem, the utility model discloses a technical scheme is: the air bag plugging device for detecting the sealing performance of the check valve in the nuclear power plant is characterized by comprising a flange, an air bag and a sealing baffle plate, wherein the sealing baffle plate is fixedly connected with the flange;
an anti-loosening assembly for preventing the air bag from loosening is arranged between the air bag and the sealing baffle and comprises an air bag U-shaped buckle, a chain and a hanging ring, the air bag U-shaped buckle is fixed on the air bag, the hanging ring is detachably mounted on the sealing baffle, one end of the chain is connected to the air bag U-shaped buckle, and the other end of the chain is connected with the hanging ring through a horseshoe buckle;
the air sac is connected with an injection pipeline for injecting air or liquid into the air sac.
The air bag plugging device for detecting the sealing performance of the check valve in the nuclear power plant is characterized in that a first channel and a second channel which are communicated with each other are arranged in the check valve, the first channel comprises a liquid inlet and a liquid outlet which are communicated with each other, a valve clack is arranged at the part, close to the liquid inlet, in the first channel, and the air bag is arranged at one side, close to the liquid outlet, in the first channel; the flange is fixedly connected to the outer end of the second channel, and the sealing baffle is arranged in the second channel; the check valve is a swing check valve or a swash plate check valve.
The sealing performance detection air bag plugging device for the check valve of the nuclear power plant is characterized in that the air bag is a cord reinforced rubber-based composite material air bag.
Foretell a nuclear power plant check valve sealing performance detects gasbag plugging device, its characterized in that, gasbag plugging device still includes the analog body, the analog body includes both ends open-ended analog body pipeline, analog body pipeline one end is provided with and is used for simulating the sealed flange of body pipeline end portion, be provided with on the analog body pipeline lateral wall with the water inlet of suppressing of analog body pipeline inner chamber intercommunication, the analog body pipeline is the linear type analog body pipeline.
Foretell check valve sealing performance of nuclear power plant detects gasbag plugging device, its characterized in that, be provided with the double-screw bolt that is used for with seal baffle and flange fixed connection on the seal baffle perpendicularly, the one end that seal baffle was kept away from to the double-screw bolt is provided with the external screw thread, offer on the flange and be used for wearing out the through-hole of double-screw bolt, be provided with on the flange be used for with double-screw bolt threaded connection's nut.
The air bag plugging device for detecting the sealing performance of the check valve of the nuclear power plant is characterized in that a mounting hole for mounting a hanging ring is formed in the sealing baffle.
The air bag plugging device for detecting the sealing performance of the check valve in the nuclear power plant is characterized by further comprising a cavity gas-water pipe for filling liquid or gas into the inner cavity of the check valve;
the sealing baffle is provided with a first opening for an injection pipeline to pass through and a second opening for a cavity gas-water pipe to pass through;
and the flange is provided with a third opening for the injection pipeline to pass through and a fourth opening for the cavity gas-water pipe to pass through.
The air bag plugging device for detecting the sealing performance of the check valve in the nuclear power plant is characterized by further comprising a sealing gasket arranged between the flange and the check valve.
Compared with the prior art, the utility model has the following advantage:
1. the utility model discloses a set up gasbag, seal baffle, flange and prevent that the gasbag pine from taking off the locking loose subassembly that gets into inside the pipeline and realize the on-line measuring to nuclear power plant's check valve sealing performance, need not to demolish the check valve that awaits measuring from the working line, realize accurate, high-efficient and the safety inspection of nuclear power plant's check valve sealing performance.
2. The utility model provides an each spare part size is small and exquisite, and is light, and the installation is dismantled all portably swiftly, is suitable for to install inside having the check valve body that inner structure is complicated, the space is narrow and small.
3. Preferably, the air bag in the utility model is a cord reinforced rubber matrix composite air bag with radiation resistance, aging resistance and corrosion resistance, which can effectively avoid the uneven expansion of the air bag after inflation.
4. As preferred, the utility model discloses an gasbag plugging device still includes the analog body, can detect the gasbag sealing condition before carrying out check valve sealing performance and detecting, the gasbag aerify or fill form seal chamber between liquid back and the sealing flange, through to the sealed chamber is internal to be suppressed and to observe the sealed condition of gasbag displacement situation and sealed department, further preferred, analog body pipeline be transparent analog body pipeline, adopt transparent analog body pipeline can more the visual observation gasbag displacement.
5. The utility model discloses the principle is reliable, has very high popularization and application and worth.
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a side view of FIG. 1;
fig. 3 is a schematic structural diagram of a simulator in the present invention;
FIG. 4 is a schematic view showing the connection relationship between the phantom, the air bag and the anti-loosening element.
Description of reference numerals:
1-1 — a first channel; 1-2 — a second channel; 1-3-liquid inlet;
1-4-liquid outlet; 1-5-valve flap; 2, air bags;
2-1 — an injection line; 3, sealing a baffle plate; 3-1-stud;
4, a flange; 4-1-nut; 5-1-air bag U-shaped buckle;
5-2-chain; 5-3-hoisting ring; 5-4-U-shaped button;
6-1-analogue body pipeline; 6-2-sealing flange; 6-3-pressing the water inlet;
and 7, a cavity gas-water pipe.
Detailed Description
As shown in fig. 1 to 4, the air bag plugging device for detecting the sealing performance of the check valve of the nuclear power plant in the embodiment includes a flange 4, an air bag 2 and a sealing baffle 3, wherein the sealing baffle 3 is fixedly connected with the flange 4;
an anti-loosening assembly for preventing the air bag 2 from loosening is arranged between the air bag 2 and the sealing baffle 3, the anti-loosening assembly comprises an air bag U-shaped buckle 5-1, a chain 5-2 and a hanging ring 5-3, the air bag U-shaped buckle 5-1 is fixed on the air bag 2, the hanging ring 5-3 is detachably mounted on the sealing baffle 3, one end of the chain 5-2 is connected to the air bag U-shaped buckle 5-1, and the other end of the chain 5-2 is connected with the hanging ring 5-3 through a horseshoe buckle 5-4;
an injection line 2-1 for injecting air or liquid into the balloon 2 is connected to the balloon 2. The utility model discloses a set up gasbag, seal baffle, flange and locking loose subassembly and realize the on-line measuring to nuclear power plant's check valve sealing performance, need not to demolish the check valve that awaits measuring from the working line, realize accurate, high-efficient and the safety inspection of nuclear power plant's check valve sealing performance. The utility model provides an each spare part size is small and exquisite, and is light, and the installation is dismantled all portably swiftly, is suitable for to install inside having the check valve body that inner structure is complicated, the space is narrow and small.
As shown in fig. 1, in this embodiment, a first channel 1-1 and a second channel 1-2 which are communicated with each other are disposed in the check valve, the first channel 1-1 includes a liquid inlet 1-3 and a liquid outlet 1-4 which are communicated with each other, a valve flap 1-5 is disposed at a portion of the first channel 1-1, which is close to the liquid inlet 1-3, and the air bag 2 is disposed at a side of the first channel 1-1, which is close to the liquid outlet 1-4; the flange 4 is fixedly connected to the outer end of the second channel 1-2, and the sealing baffle 3 is arranged in the second channel 1-2; the check valve is a swing check valve or a swash plate check valve; the swing check valve is a welded swing check valve.
In this embodiment, the airbag 2 is a cord reinforced rubber-based composite airbag. The utility model discloses choose for use to have irradiation-resistant, ageing-resistant, corrosion-resistant cord thread reinforcing rubber base combined material gasbag, can effectively avoid the gasbag to aerify the back inflation inhomogeneous.
As shown in fig. 3, in this embodiment, the airbag blocking device further includes a simulator, the simulator includes a simulator pipe 6-1 with openings at two ends, a sealing flange 6-2 for sealing an end of the simulator pipe 6-1 is disposed at one end of the simulator pipe 6-1, a pressurizing water inlet 6-3 communicated with an inner cavity of the simulator pipe 6-1 is disposed on a side wall of the simulator pipe 6-1, and the simulator pipe 6-1 is a linear simulator pipe. As preferred, the utility model discloses an gasbag plugging device still includes the analog body, can detect the gasbag sealing condition before carrying out check valve sealing performance and detecting, the gasbag aerify or fill form seal chamber between liquid back and the sealing flange, through to the sealed chamber is internal to be suppressed and to observe the sealed condition of gasbag displacement situation and sealed department, further preferred, analog body pipeline is transparent analog body pipeline, adopts transparent analog body pipeline can more the visual observation gasbag displacement. The sealing flange 6-2 is provided with a hanging ring connecting hole for connecting the hanging ring 5-3 and a pipeline through hole for penetrating the injection pipeline 2-1, and the pressurizing water inlet 6-3 is used for injecting air or liquid into the inner cavity of the simulator pipeline.
As shown in fig. 1 and 2, in this embodiment, a stud 3-1 for fixedly connecting a sealing baffle 3 and a flange 4 is vertically arranged on the sealing baffle 3, an external thread is arranged at one end of the stud 3-1 away from the sealing baffle 3, a through hole for penetrating through the stud 3-1 is formed in the flange 4, and a nut 4-1 for being in threaded connection with the stud 3-1 is arranged on the flange 4. The sealing baffle is fixedly connected with the flange, and the sealing baffle is matched with the flange to seal the cavity.
In this embodiment, the sealing baffle 3 is provided with a mounting hole for mounting the hanging ring 5-3. Firm connection between the air bag and the sealing baffle is achieved through the U-shaped buckle, the chain, the lifting ring and the horseshoe buckle of the air bag, and the fact that the position of the air bag moves to influence detection accuracy due to increase of pressure in the cavity in the detection process is prevented.
As shown in fig. 2, in this embodiment, the gas-water pipe 7 for filling liquid or gas into the inner cavity of the check valve is further included;
the sealing baffle 3 is provided with a first opening for the injection pipeline 2-1 to pass through and a second opening for the cavity gas-water pipe 7 to pass through;
and a third opening for the injection pipeline 2-1 to pass through and a fourth opening for the cavity gas-water pipe 7 to pass through are formed in the flange 4. The injection pipeline is used for filling air pressure or hydraulic pressure into the air bag, the cavity air water pipe 7 is used for filling air pressure or hydraulic pressure into the inner cavity of the check valve to be detected, and the cavity air water pipe 7 is communicated with the inner cavity of the check valve sequentially through the second opening and the fourth opening and is also used as a detection port for detecting the air pressure and the hydraulic pressure in the inner cavity.
In this embodiment, the check valve further comprises a sealing gasket arranged between the flange 4 and the check valve. The sealing gasket may increase the sealing.
Adopt the utility model discloses carry out the method that nuclear power plant check valve sealing performance detected, including following step:
step one, detecting air tightness of an air bag: the sealing flange 6-2 is tightly connected to one end of the simulator pipeline 6-1 through a sealing ring matched with a bolt and a nut, the chain 5-2 is connected with the air bag U-shaped buckle 5-1, one end, far away from the air bag U-shaped buckle 5-1, of the chain 5-2 is sleeved into the horseshoe buckle 5-4, the horseshoe buckle 5-4 is connected with the lifting ring 5-3, and the lifting ring 5-3 is fixed in a lifting ring connecting hole in the sealing flange 6-2; the air bag 2 is arranged at one end of the simulator pipeline 6-1 far away from the sealing flange 6-2, and the installation schematic diagram is shown in figure 4; filling the air bag 2 with 0.2MPa of air pressure through an injection pipeline 2-1, forming a closed cavity between the air bag 2 and the sealing flange 6-2, detecting the leakage rate of the closed cavity by using a precision leakage measuring instrument F80 until the technical requirement is met, and exhausting the air in the air bag 2 after the air bag air tightness detection is finished;
step two, detecting the pressure bearing of the air bag: filling liquid into the air bag 2 after the air is exhausted through the injection pipeline 2-1 until the water pressure is 3MPa, maintaining the pressure for 3-5 min, observing the sealing condition of the air bag until the sealing condition meets the technical requirements, and exhausting the liquid in the air bag 2 after the air bag pressure bearing detection is finished;
step three, detecting the gas tightness: filling 4-5 MPa of water pressure into the air bag 2 after the liquid is drained in the step two through an injection pipeline 2-1, forming a closed cavity between the air bag 2 and a sealing flange 6-2, filling compressed air with the pressure of more than or equal to 0.6MPa into the closed cavity in the simulator through a pressurizing water inlet 6-3, stabilizing the pressure for 10min, testing the gas flow in the closed cavity, testing the time of more than or equal to 15min until the technical requirements are met, and draining the liquid in the air bag 2 and the air in the closed cavity after the gas tightness detection is completed;
step four, detecting the liquid tightness: filling 4-5 MPa of water pressure into the air bag 2 after the liquid is completely discharged in the step three through an injection pipeline 2-1, forming a closed cavity between the air bag 2 and a sealing flange 6-2, filling the water pressure of more than or equal to 1.5MPa into the closed cavity in the simulator through a pressurizing water inlet 6-3, stabilizing the pressure for 10min, testing the liquid flow in the closed cavity, testing the time of more than or equal to 15min until the technical requirements are met, and completely discharging the liquid in the air bag 2 and the liquid in the closed cavity after the liquid tightness detection is completed;
fifthly, taking out the air bag 2 and the anti-loosening assembly in the simulation body;
step six, the air bag plugging device is installed in the check valve, and the installation process comprises the following steps: installing an air bag 2 in a first channel 1-1 of a check valve to be tested, connecting a chain 5-2 with an air bag U-shaped buckle 5-1, connecting one end, far away from the air bag U-shaped buckle 5-1, of the chain 5-2 with a lifting ring 5-3, fixing the lifting ring 5-3 in an installation hole in a sealing baffle 3, enabling an injection pipeline 2-1 to penetrate out of a first opening in the sealing baffle 3 and a third opening in a flange 4, enabling a cavity air-water pipe 7 to penetrate out of a second opening in the sealing baffle 3 and a fourth opening in the flange 4, fixedly connecting the sealing baffle 3 with the flange 4, and fixing the flange 4 and a sealing washer outside the second pipeline 1-2 to complete installation of an air bag plugging device;
seventhly, testing the gas seal of the check valve to be tested: filling a water pressure of 4-5 Mpa into the air bag 2 through an injection pipeline 2-1 to enable the air bag 2 to expand and then form a plugging cavity with the inner wall of the check valve to be tested, filling compressed air of more than or equal to 0.6Mpa into the plugging cavity through a cavity air-water pipe 7, stabilizing the pressure for 10min, testing the gas flow in the plugging cavity by using a gas flow tester, testing the time of more than or equal to 15min until the technical requirements are met, and discharging liquid in the air bag 2 and gas in the plugging cavity after the gas sealing test of the check valve to be tested is completed;
step eight, testing the liquid tightness of the check valve to be tested: and (3) filling 4-5 MPa of water pressure into the air bag 2 after the liquid is drained in the step seven through the injection pipeline 2-1 to enable the air bag 2 to expand and then form a plugging cavity with the inner wall of the check valve to be tested, filling more than or equal to 1.5MPa of water pressure into the plugging cavity through the cavity gas-water pipe 7, stabilizing the pressure for 10min, testing the liquid flow in the plugging cavity by using a liquid flow tester, and testing the liquid tightness of the check valve to be tested when the test time is more than or equal to 15min until the technical requirements are met.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to utility model technical entity to any simple modification, change and the equivalent structure change of doing above embodiment, all still belong to the utility model discloses technical scheme's within the scope of protection.
Claims (8)
1. The air bag plugging device for detecting the sealing performance of the check valve in the nuclear power plant is characterized by comprising a flange (4), an air bag (2) and a sealing baffle plate (3), wherein the sealing baffle plate (3) is fixedly connected with the flange (4);
an anti-loosening component used for preventing the air bag (2) from loosening is arranged between the air bag (2) and the sealing baffle (3), the anti-loosening component comprises an air bag U-shaped buckle (5-1), a chain (5-2) and a lifting ring (5-3), the air bag U-shaped buckle (5-1) is fixed on the air bag (2), the lifting ring (5-3) is detachably mounted on the sealing baffle (3), one end of the chain (5-2) is connected to the air bag U-shaped buckle (5-1), and the other end of the chain (5-2) is connected with the lifting ring (5-3) through a horseshoe buckle (5-4);
the air sac (2) is connected with an injection pipeline (2-1) for injecting air or liquid into the air sac (2).
2. The nuclear power plant check valve sealing performance detection air bag plugging device is characterized in that a first channel (1-1) and a second channel (1-2) which are communicated with each other are arranged in the check valve, the first channel (1-1) comprises a liquid inlet (1-3) and a liquid outlet (1-4) which are communicated with each other, a valve flap (1-5) is arranged at a part, close to the liquid inlet (1-3), in the first channel (1-1), and the air bag (2) is arranged at one side, close to the liquid outlet (1-4), in the first channel (1-1); the flange (4) is fixedly connected to the outer end of the second channel (1-2), and the sealing baffle (3) is arranged in the second channel (1-2); the check valve is a swing check valve or a swash plate check valve.
3. The nuclear power plant check valve sealing performance detection air bag plugging device is characterized in that the air bag (2) is a cord reinforced rubber-based composite material air bag.
4. The air bag plugging device for detecting the sealing performance of the check valve in the nuclear power plant according to claim 1, wherein the air bag plugging device further comprises a simulation body, the simulation body comprises a simulation body pipeline (6-1) with two open ends, a sealing flange (6-2) for sealing the end part of the simulation body pipeline (6-1) is arranged at one end of the simulation body pipeline (6-1), a pressurizing water inlet (6-3) communicated with the inner cavity of the simulation body pipeline (6-1) is arranged on the side wall of the simulation body pipeline (6-1), and the simulation body pipeline (6-1) is a linear simulation body pipeline.
5. The nuclear power plant check valve sealing performance detection air bag plugging device is characterized in that a stud (3-1) for fixedly connecting the sealing baffle (3) with a flange (4) is vertically arranged on the sealing baffle (3), an external thread is arranged at one end, far away from the sealing baffle (3), of the stud (3-1), a through hole for penetrating out of the stud (3-1) is formed in the flange (4), and a nut (4-1) for being in threaded connection with the stud (3-1) is arranged on the flange (4).
6. The nuclear power plant check valve sealing performance detection air bag plugging device is characterized in that a mounting hole for mounting a hanging ring (5-3) is formed in the sealing baffle plate (3).
7. The nuclear power plant check valve sealing performance detection air bag plugging device is characterized by further comprising a cavity gas-water pipe (7) for filling liquid or gas into an inner cavity of the check valve;
the sealing baffle (3) is provided with a first opening for the injection pipeline (2-1) to pass through and a second opening for the cavity gas-water pipe (7) to pass through;
and a third opening for the injection pipeline (2-1) to pass through and a fourth opening for the cavity gas-water pipe (7) to pass through are formed in the flange (4).
8. The nuclear power plant check valve sealing performance detection air bag plugging device is characterized by further comprising a sealing gasket arranged between the flange (4) and the check valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021222004.1U CN212779810U (en) | 2020-06-28 | 2020-06-28 | Nuclear power plant check valve sealing performance detects gasbag plugging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021222004.1U CN212779810U (en) | 2020-06-28 | 2020-06-28 | Nuclear power plant check valve sealing performance detects gasbag plugging device |
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| Publication Number | Publication Date |
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| CN212779810U true CN212779810U (en) | 2021-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021222004.1U Active CN212779810U (en) | 2020-06-28 | 2020-06-28 | Nuclear power plant check valve sealing performance detects gasbag plugging device |
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| Country | Link |
|---|---|
| CN (1) | CN212779810U (en) |
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2020
- 2020-06-28 CN CN202021222004.1U patent/CN212779810U/en active Active
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