CN211599915U - Pressurized sealing tool for internal leakage drain valve - Google Patents
Pressurized sealing tool for internal leakage drain valve Download PDFInfo
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- CN211599915U CN211599915U CN202020140772.6U CN202020140772U CN211599915U CN 211599915 U CN211599915 U CN 211599915U CN 202020140772 U CN202020140772 U CN 202020140772U CN 211599915 U CN211599915 U CN 211599915U
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Abstract
The utility model discloses an interior area of leaking trap presses sealed frock, include: one end of the drainage tube is sleeved on the outer wall of the output pipeline of the inner leakage drain valve, and the port of the end is welded and fixed with the valve body of the inner leakage drain valve; the first sealing element is arranged between the inner wall of one end of the drainage tube and the outer wall of the output pipeline of the inner leakage drain valve so as to seal; and the input port of the drainage valve is connected to the other end of the drainage tube. This frock sets up first sealing member between drainage tube and output pipeline, can prevent that the water that the drainage flows out from the port play of the clearance flow direction drainage tube one end between drainage tube and the output pipeline, so, can be under the operating mode of drainage water, carry out the shutoff welding to the internal drain trap that leaks.
Description
Technical Field
The application relates to the technical field of pressurized plugging welding tools, in particular to a pressurized sealing tool of an internal leakage drain valve.
Background
The nuclear power generation is a process of converting heat energy into electric energy, mainly by conducting the heat energy released by nuclear fission to water through a primary loop system so as to heat the water to generate steam, and then pushing a steam turbine generator to generate electricity by utilizing the formed steam.
The nuclear power generation is a continuous process, if a drain valve in a loop system leaks or the leakage rate is abnormal and the leakage rate reaches 230L/H, the loop system can cause the whole unit to be in a retreating state due to overhigh leakage rate so as to influence normal power generation. For plugging the internal leakage defect of the drain valve of the nuclear power station, the primary loop system is usually completely isolated and emptied, and the internal leakage drain valve is plugged or overhauled in a non-pressure state. Therefore, the overhaul period is prolonged, and the overhaul cost is increased.
SUMMERY OF THE UTILITY MODEL
The application aims at providing an area of interior hourglass trap presses sealed frock, can be under the non-stop state, carries out the shutoff to interior hourglass trap.
The application provides sealed frock is pressed in area of interior hourglass trap includes:
one end of the drainage tube is sleeved on the outer wall of the output pipeline of the inner leakage drain valve, and the port of the end is welded and fixed with the valve body of the inner leakage drain valve;
the first sealing element is arranged between the inner wall of one end of the drainage tube and the outer wall of the output pipeline of the inner leakage drain valve so as to seal;
and the input port of the drainage valve is connected to the other end of the drainage tube.
Further, the sealed frock of area of interior hourglass trap, wherein, still include: the plugging piece is arranged at the output port of the drainage valve so as to plug the output port of the drainage valve.
Further, the sealed frock of area of interior hourglass trap, wherein, still include: the one end of connecting pipe is connected the delivery outlet of drainage valve, the shutoff piece sets up the other end of connecting pipe is in order to the shutoff the other end of connecting pipe.
Further, the belt pressure sealing tool for the inner leakage drain valve is characterized in that at least one first annular groove is formed in the inner wall of the drainage pipe, and each first sealing element comprises a first annular sealing ring accommodated in each first annular groove.
Further, the sealed frock of area of interior hourglass trap, wherein, still include: a second sealing member disposed between the blocking member and the other end of the connection pipe.
Further, the pressurized sealing tool of the inner leakage drain valve comprises a plugging piece and a sealing piece, wherein the plugging piece comprises a cylindrical side wall and a bottom wall arranged at one end of the cylindrical side wall in the axial direction, the inner diameter of the cylindrical side wall is matched with the outer diameter of the other end of the connecting pipe, an internal thread is arranged on the inner diameter of the cylindrical side wall, and an external thread matched with the internal thread is arranged on the outer wall of the other end of the connecting pipe; the plugging piece is in threaded connection with the external thread through the internal thread, and the other port of the cylindrical side wall is welded and fixed with the outer wall of the connecting pipe; the second sealing piece is arranged between the bottom wall and the other end port of the connecting pipe.
Further, leak the area of trap in area and press sealed frock, wherein, the diapire orientation the one side of a barrel-type lateral wall axial direction port is provided with the annular groove of second, the second sealing member is including holding the annular sealing washer of second in the annular groove of second.
Further, the pressurized sealing tool for the inner leakage drain valve is characterized in that the pressure bearing grade of the drainage tube is greater than or equal to that of the inner leakage drain valve, and the temperature bearing grade of the drainage tube is greater than or equal to that of the inner leakage drain valve.
Further, the frock is sealed in area of leaking trap in, wherein, the flow of drainage valve is greater than the interior leakage capacity of leaking the trap in.
Further, leak the area of trap seal frock in, wherein, the drainage tube includes: the first pipe section is sleeved on the outer wall of the output pipeline of the inner leakage drain valve, and the length of the first pipe section is matched with that of the output pipeline of the inner leakage drain valve; the inner diameter of the first pipe section is larger than that of the second pipe section, one end of the first pipe section is welded on the valve body of the inner leakage drain valve, and a drainage port with the size matched with that of the second pipe section is formed at the other end of the first pipe section; one end of the second pipe section is connected with the drainage port, and the other end of the second pipe section is connected with the input port of the drainage valve.
The utility model has the advantages that:
the application provides a leak sealed frock in area of trap includes: one end of the drainage tube is sleeved on the outer wall of the output pipeline of the inner leakage drain valve, and the port of the end is welded and fixed with the valve body of the inner leakage drain valve; the first sealing element is arranged between the inner wall of one end of the drainage tube and the outer wall of the output pipeline of the inner leakage drain valve so as to seal; and the input port of the drainage valve is connected to the other end of the drainage tube. This frock sets up first sealing member between drainage tube and output pipeline, can prevent that the water that the drainage flows out from the port play of the clearance flow direction drainage tube one end between drainage tube and the output pipeline, so, can be under the operating mode of drainage water, carry out the shutoff welding to the internal drain trap that leaks.
Drawings
FIG. 1 is a schematic structural view of a pressurized sealing tool of an internal leakage trap provided by the present application.
Detailed Description
The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments.
The application provides a pressure sealing tool of an inner leakage drain valve, which is used for performing plugging welding on the inner leakage drain valve under the condition that the leakage rate of the drain valve is abnormal in a loop system of a nuclear power station. The tool can be used for plugging and welding the drain valve with internal leakage without stopping the nuclear power station.
Of course, in other embodiments, the pressurized sealing tool can also be used for sealing and welding valve bodies with internal leakage in other systems.
Referring to fig. 1, the pressurized sealing tool of the internal leakage steam trap provided by the application comprises: a drain tube 10, a first seal 20 and a drain valve 30.
One end of the drainage tube 10 is sleeved on the outer wall of the output pipeline 62 connected with the output end 61 of the inner drain trap 60, in other words, the inner wall of one end of the drainage tube 10 is in clearance fit with the outer wall of the output pipeline 62 connected with the output end 61 of the inner drain trap 60, so that the drainage tube 10 is conveniently sleeved. And, the port 111 of the end of draft tube 10 is welded to the outer surface of the body of inner drain trap 60.
In FIG. 1, the solid black portion at the port 111 of one end of draft tube 10 is the welded effect, i.e., the port 111 of one end of draft tube 10 is welded and fixed to the outer surface of the valve body of inner drain trap 60 by full welding.
And a flow-guiding valve 30, wherein the flow-guiding valve 30 is provided with an input port 31 and an output port 32, and the flow-guiding valve 30 is used for conducting or disconnecting the communication between the input port 31 and the output port 32 by rotating the valve. The input port 31 of the drain valve 30 is connected to the other end of the drain tube 10, i.e., the input port 31 is disconnected from the other end of the drain tube 10.
After detecting that the leakage rate of the inner leakage drain valve 60 of the loop system is abnormal, the inner leakage drain valve 60 needs to be blocked and repaired. In the plugging process, one end of the drainage tube 10 is sleeved on the output pipeline 62, water in a loop system is discharged through the output end 61 of the inner leakage drain valve 60, the output pipeline 62 connected to the output end 61, the input port 31 and the output port 32 of the drainage valve 30, and then the port 111 at one end of the drainage tube 10 can be welded on the outer wall of the valve body of the inner leakage drain valve 60. After the weld is complete, the flow diverter valve 30 needs to be closed, i.e., the input port 31 of the flow diverter valve 30 is disconnected from the output port 32. Therefore, the inner leakage drain valve can be sealed and welded without stopping.
After the plugging welding is finished, the nuclear power station pole group operates for one period (18M), then the internal leakage drain valve is overhauled or replaced, and the original design state is recovered.
In this embodiment, since the first sealing member 20 for sealing the gap between the inner wall of one end of the draft tube 10 and the outer wall of the output pipe 62 is disposed between the two, the water flowing out through the gap between the two can be prevented from flowing to the port 111 of one end of the draft tube 10, and the welding quality of the port 111 and the valve body of the inner drain trap 60 can be ensured.
It should be noted that the output line 62 of the inner drain trap 60 is a connection line itself connected to the output end 61 of the inner drain trap 60, and the output line 62 is formed by cutting the connection line to a predetermined length. In a preferred embodiment, the predetermined length is 40mm, and the connecting line is cut to a length of 40 mm.
In the present application, at least one first annular groove 112 is formed on the inner wall of one end of the drainage tube 10, and the first sealing member 20 includes a first annular sealing ring received in the first annular groove 112, and each first annular groove 112 receives the first annular sealing ring therein. Adopt the tight fit between this first ring type sealing washer and the first ring type recess 112, perhaps, adopt sticky mode to fix first ring type sealing washer in first ring type recess 112 to, before cup jointing the one end of drainage tube 10 at output pipeline 62, this first ring type sealing washer has been fixed mounting in first ring type recess 112, then, in the cup jointing in-process, because first ring type sealing washer adopts tight fit or sticky mode to hold in first ring type recess 112, first ring type sealing washer can not break away from first ring type recess 112.
With reference to fig. 1, in this embodiment, the pressure-bearing grade of the drainage tube 10 is greater than or equal to the pressure-bearing grade of the inner drain trap 60, the temperature-bearing grade of the drainage tube 10 is greater than or equal to the temperature-bearing grade of the inner drain trap 60, and the flow rate of the drainage valve 30 is greater than or equal to the inner leakage amount of the inner drain trap 60, that is, greater than or equal to the inner leakage rate of the inner drain trap 60.
In a primary loop system of a nuclear power plant, if the pressure of water at the upstream of the input port of the inner drain trap 60 reaches 175barg, the pressure-bearing level of the inner drain trap 60 needs to bear the pressure of 175barg, and the pressure-bearing level of the draft tube 10 needs to be greater than or equal to 175 barg. If the temperature of the water upstream of the inlet of the inner drain trap 60 reaches 155 ℃, the temperature-bearing grade of the inner drain trap 60 needs to bear 155 ℃, and the temperature-bearing grade of the draft tube 10 needs to be more than or equal to 155 ℃. If the inner drain trap 60 meets the 230L/H maximum leakage level in the primary circuit system at a 230L/H leakage rate, the flow rate of the bleed valve 30 should be equal to or greater than 230L/H.
In some embodiments, in order to avoid the leakage phenomenon occurring in the drainage valve 30 due to the failure, it is necessary to seal the output port 32 of the drainage valve 30, and therefore, the pressurized sealing tool of the internal leakage drainage valve provided by the present application further includes: a blocking member 40, the blocking member 40 being disposed at the output port 32 of the flow-diversion valve 30 to block the output port 32 of the flow-diversion valve 30.
Of course, for the connection of shutoff piece 40, the area of leaking trap still includes in the area that this application provided is pressed to seal frock: and a connection pipe 50 having one end of the connection pipe 50 connected to the output port 32 of the drainage valve 30, and the aforementioned blocking member 40 provided at the other end of the connection pipe 50 to block the other end of the connection pipe 50.
With continued reference to fig. 1, the previously described closure 40 comprises: a cylindrical side wall 41 and a bottom wall 42, wherein the bottom wall 42 is disposed at an axial end of the cylindrical side wall 41, the inner diameter of the cylindrical side wall 41 is adapted to the outer diameter of the other end of the connecting pipe 50, an internal thread is disposed on the inner diameter of the cylindrical side wall 41, and an external thread adapted to the internal thread is disposed on the outer wall of the other end of the connecting pipe 50. The plugging member 40 is fixedly connected to the other end of the connection pipe 50 by screwing the internal thread and the external thread, and after the plugging member 40 is connected to the other end of the connection pipe 50, the other port of the cylindrical sidewall 41 in the axial direction is welded and fixed to the outer wall of the connection pipe 50.
In some embodiments, in order to improve the sealing effect between the plugging member 40 and the other end of the connecting pipe 50, the pressurized sealing tool of the internal leakage steam trap provided by the present application further includes: a second sealing member (not shown) is provided between the blocking member 40 and the other end of the connection pipe 50. Specifically, the second seal is disposed between the bottom wall 42 and the other end port of the connecting tube 50. More specifically, a second annular groove (not shown) is provided on a face of the bottom wall 42 facing an axial direction one end of the cylindrical side wall 42, and the second seal member includes a second annular seal ring accommodated in the second annular groove.
With continued reference to FIG. 1, in some embodiments, the previously described drain tube 10 includes: a first pipe segment 11 and a second pipe segment 12, wherein the first pipe segment 11 is sleeved on the outer wall of the output pipeline 62 of the inner leakage steam trap 60, the length of the first pipe segment 11 is adapted to the length of the output pipeline 62 of the inner leakage steam trap, and preferably, the length of the first pipe segment 11 is basically equal to the length of the output pipeline 62 of the inner leakage steam trap. The inner diameter of the first pipe section 11 is greater than the inner diameter of the second pipe section 12, the port at one end of the first pipe section 11 is the port 111 at one end of the drainage pipe 10, the port at one end of the first pipe section 11 is welded and fixed on the valve body of the internal leakage drain valve 60, the port 113 at the other end is formed with the drainage port 113 with the size matched with the port at one end of the second pipe section 12, the port at one end of the second pipe section 12 is connected with the drainage port 113, and the other end of the second pipe section 12 is connected with the input port 31 of the drainage valve 30.
In the application, after the pressure sealing tool of the inner leakage drain valve is manufactured, a hydrostatic test is carried out on the pressure sealing tool, so that the pressure sealing tool is in a pressure environment of 175barg, is maintained for 10min, is depressurized without visible leakage, and is a qualified pressure sealing tool.
In conclusion, the pressurized sealing tool for the inner leakage drain valve provided by the embodiment can be used for plugging and welding the inner leakage drain valve in a non-stop state. Set up first sealing member between drainage tube and output pipeline, can prevent that the water that draws the outflow from flowing to the port play of drainage tube one end through the clearance between drainage tube and the output pipeline, so, can be under the operating mode of drainage water, carry out the shutoff welding to the internal drain trap.
The foregoing is a more detailed description of the present application in connection with specific embodiments thereof, and it is not intended that the present application be limited to the specific embodiments thereof. It will be apparent to those skilled in the art from this disclosure that many more simple derivations or substitutions can be made without departing from the inventive concepts herein.
Claims (10)
1. The utility model provides an interior area of leaking trap presses sealed frock which characterized in that includes:
one end of the drainage tube is sleeved on the outer wall of the output pipeline of the inner leakage drain valve, and the port of the end is welded and fixed with the valve body of the inner leakage drain valve;
the first sealing element is arranged between the inner wall of one end of the drainage tube and the outer wall of the output pipeline of the inner leakage drain valve so as to seal;
and the input port of the drainage valve is connected to the other end of the drainage tube.
2. The pressurized sealing tool of the inner leakage steam trap as claimed in claim 1, further comprising: the plugging piece is arranged at the output port of the drainage valve so as to plug the output port of the drainage valve.
3. The pressurized sealing tool of the inner leakage steam trap as claimed in claim 2, further comprising: the one end of connecting pipe is connected the delivery outlet of drainage valve, the shutoff piece sets up the other end of connecting pipe is in order to the shutoff the other end of connecting pipe.
4. The belt press sealing tool for an internal leakage drain valve according to claim 1, wherein at least one first annular groove is formed in the inner wall of the drainage pipe, and the first sealing member comprises a first annular sealing ring accommodated in each first annular groove.
5. The pressurized sealing tool of the inner leakage steam trap as claimed in claim 3, further comprising: a second sealing member disposed between the blocking member and the other end of the connection pipe.
6. The pressurized sealing tool of the internal leakage drain valve according to claim 5, wherein the plugging piece comprises a cylindrical side wall and a bottom wall arranged at one port of the cylindrical side wall in the axial direction, the inner diameter of the cylindrical side wall is adapted to the outer diameter of the other end of the connecting pipe, the inner diameter of the cylindrical side wall is provided with an internal thread, and the outer wall of the other end of the connecting pipe is provided with an external thread adapted to the internal thread; the plugging piece is in threaded connection with the external thread through the internal thread, and the other port of the cylindrical side wall is welded and fixed with the outer wall of the connecting pipe; the second sealing piece is arranged between the bottom wall and the other end port of the connecting pipe.
7. The belt pressure sealing tool for the inner leakage steam trap as claimed in claim 6, wherein a second annular groove is formed in a surface of the bottom wall facing to a port in the axial direction of the cylindrical side wall, and the second sealing element comprises a second annular sealing ring accommodated in the second annular groove.
8. The tool for sealing the inner leakage drain valve with pressure as claimed in claim 1, wherein the pressure bearing grade of the drainage tube is greater than or equal to that of the inner leakage drain valve, and the temperature bearing grade of the drainage tube is greater than or equal to that of the inner leakage drain valve.
9. The pressurized sealing tool of the inner leakage steam trap of claim 1, wherein the flow of the flow-guiding valve is larger than the inner leakage of the inner leakage steam trap.
10. The pressurized sealing tool of an internal leakage trap as claimed in claim 1, wherein said draft tube comprises: the first pipe section is sleeved on the outer wall of the output pipeline of the inner leakage drain valve, and the length of the first pipe section is matched with that of the output pipeline of the inner leakage drain valve; the inner diameter of the first pipe section is larger than that of the second pipe section, one end of the first pipe section is welded on the valve body of the inner leakage drain valve, and a drainage port with the size matched with that of the second pipe section is formed at the other end of the first pipe section; one end of the second pipe section is connected with the drainage port, and the other end of the second pipe section is connected with the input port of the drainage valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020140772.6U CN211599915U (en) | 2020-01-21 | 2020-01-21 | Pressurized sealing tool for internal leakage drain valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020140772.6U CN211599915U (en) | 2020-01-21 | 2020-01-21 | Pressurized sealing tool for internal leakage drain valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211599915U true CN211599915U (en) | 2020-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020140772.6U Active CN211599915U (en) | 2020-01-21 | 2020-01-21 | Pressurized sealing tool for internal leakage drain valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211599915U (en) |
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2020
- 2020-01-21 CN CN202020140772.6U patent/CN211599915U/en active Active
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