CN213983013U - Safety maintenance system for low-position block valve of generator set boiler - Google Patents
Safety maintenance system for low-position block valve of generator set boiler Download PDFInfo
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- CN213983013U CN213983013U CN202023055697.2U CN202023055697U CN213983013U CN 213983013 U CN213983013 U CN 213983013U CN 202023055697 U CN202023055697 U CN 202023055697U CN 213983013 U CN213983013 U CN 213983013U
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Abstract
The utility model discloses a generating set boiler low level stifled valve safety inspection system, including inlet channel, drainage pipe and detection closure plate, the inlet channel with drainage pipe is located same one side of low level stifled valve, the inlet channel with drainage pipe respectively with low level stifled valve intercommunication, it is in to detect the closure plate setting be used for the shutoff in the low level stifled valve. The utility model discloses in, when needing to overhaul low level stop valve, it places the closure plate in low level stop valve to detect, with low level stop valve shutoff, let in the pressurized-water to low level stop valve through the inlet channel, carry out water pressure test to the reheater of low level stop valve and unit, after water pressure test, close the inlet channel, open drainage pipe, discharge the pressurized-water in with low level stop valve through drainage pipe, then demolish the detection closure plate of low level stop valve, can high-efficiently arrange the pressurized-water of the inside saving of low level stop valve to the greatest extent, guarantee maintenance operation safety, realize each item maintenance target.
Description
Technical Field
The utility model relates to a generating set overhauls equipment technical field, especially relates to a generating set boiler low level stop valve safety inspection system.
Background
The generator set boilers of some thermal power plants are direct-current furnaces with supercritical parameter variable-pressure operation, single intermediate reheating, single hearth, balanced ventilation, solid-state slag discharge, open-air arrangement, partial sealing, all-steel framework, pi-shaped arrangement and front and rear wall opposed firing modes. The exhausted steam of the high-pressure cylinder of the steam turbine enters the intermediate-pressure cylinder to do work after absorbing heat and raising the temperature through a secondary steam system of the boiler.
The inlet and outlet pipelines of the boiler secondary steam system are provided with a low-position block valve and a high-position block valve. The low-position block valve bears 5MPa of dynamic pressure and 0.35MPa of static pressure during a hydrostatic test. After the hydrostatic test is finished, pressurized water in the low-level block valve needs to be drained to the greatest extent, and the smoothness and normal operation of a secondary steam system are guaranteed. The prior art is only a secondary steam system which is normally and naturally drained and is not provided with a special safety maintenance drainage system for a low-position block valve. The secondary steam system of the generator set boiler has the advantages of large volume, large fall, large diameter of the low-position block valve and strong water storage capacity, pressurized water reserved in the low-position block valve cannot be discharged to the greatest extent after each hydraulic test, the safety risk is large when the gland of the low-position block valve is removed, and the safety and the construction period of maintenance operation are greatly influenced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a generating set boiler low level stop valve safety inspection system to the pressurized water that has of reserving in the low level stop valve all can't arranging to the greatest extent after solving among the prior art among the hydrostatic test, the great problem of safe risk when demolising low level stop valve gland.
In order to solve the above problem, the utility model adopts the following technical scheme:
the utility model provides a generating set boiler low level stifled valve safety maintenance system, includes inlet channel, drainage pipe and detects the closure plate, the inlet channel with drainage pipe is located same one side of low level stifled valve, the inlet channel with drainage pipe respectively with low level stifled valve intercommunication, it sets up to detect the closure plate be used for the shutoff in the low level stifled valve.
The low-position block valve is installed on the main pipeline, and the water inlet pipeline and the drainage pipeline are respectively connected with the main pipeline.
The drainage pipeline with the junction of trunk line is located the lowest of trunk line.
The connecting part of the drainage pipeline and the main pipeline is provided with a pipe seat, and the pipe seat is respectively and fixedly connected with the drainage pipeline and the main pipeline.
One end of the drainage pipeline is connected with the main pipeline, and the other end of the drainage pipeline is connected with the drainage header.
And a pipe seat is arranged at the joint of the drainage pipeline and the drainage header, and the pipe seat is fixedly connected with the drainage pipeline and the drainage header respectively.
And a valve is arranged on the drainage pipeline.
And the water inlet end and the water outlet end of the drainage pipeline are respectively provided with a valve, and the valves comprise a manual valve and an electric valve.
The water inlet end of the drainage pipeline is provided with the manual valve.
The water outlet end of the drainage pipeline is provided with the electric valve.
The utility model discloses a technical scheme can reach following beneficial effect:
adopt the utility model discloses a generating set boiler low level plug valve safety inspection system, when needing to overhaul low level plug valve, will detect the closure plate and place in low level plug valve, with the low level plug valve shutoff, let in the pressurized-water to low level plug valve through the inlet channel, carry out water pressure test to the reheater of low level plug valve and unit, after water pressure test, close the inlet channel, open drainage pipe, discharge through the pressurized-water of drainage pipe in with low level plug valve, then demolish the detection closure plate of low level plug valve, can high-efficiently arrange the pressurized-water of the inside reservation of low level plug valve to the greatest extent, guarantee maintenance operation safety, realize each item maintenance target.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:
fig. 1 is a schematic view of a low-position block valve of the present invention;
fig. 2 is the utility model discloses a safety inspection system connection schematic diagram.
Description of reference numerals:
10 water inlet pipeline
20 drainage pipeline
21 hand valve
22 electric valve
30 detecting block board
40 low-position stop valve
41 pressing cover
50 main pipeline
60 tube seat
70 drainage header
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 1-2, the utility model provides a generating set boiler low level stifled valve safety inspection system, this safety inspection system includes inlet channel 10, drainage pipe 20 and detects closure plate 30, inlet channel 10 is located the same one side of low level stifled valve 40 with drainage pipe 20, inlet channel 10 is located the low reaches of low level closure valve 40 with drainage pipe 20, inlet channel 10 communicates with low level closure valve 40 respectively with drainage pipe 20, detect the closure plate 30 and set up and be used for shutoff low level closure valve 40 in low level closure valve 40. When needing to overhaul low level stop valve 40, open the gland 41 of low level stop valve 40, will detect closure plate 30 and place in low level stop valve 40, with low level stop valve 40 shutoff, let in the pressurized-water to low level stop valve 40 through inlet channel 10, carry out hydraulic test to the reheater of low level stop valve 40 and unit, the utility model discloses bear dynamic pressure 5MPa, static pressure 0.35MPa during low level stop valve 40 hydraulic test. After the hydrostatic test, close inlet channel 10, open drainage pipe 20, through drainage pipe 20 with the pressure water discharge in the low level stop valve 40, then demolish the detection closure plate 30 of low level stop valve 40, can arrange the inside pressure water of reserving of low level stop valve 40 to the greatest extent with high efficiency, guarantee maintenance operation safety realizes each item and overhauls the target.
In this embodiment, the low-level block valve 40 is installed on the main pipe 50, and the water inlet pipe 10 and the water outlet pipe 20 are respectively connected to the main pipe 50. The main conduit 50 may be a DN800 conduit. When the steam-water separator normally operates, high-temperature steam passes through the main pipeline 50, and when the steam-water separator needs to be overhauled, the steam stops flowing, and pressurized water is introduced into the low-position block valve 40 through the water inlet pipeline 10.
The junction of drainage pipe 20 and trunk line 50 is located the lowest of trunk line 50 in this embodiment, and trunk line 50 is connected with the lowest of low level stop valve 40, can guarantee that the pressure rivers that remain in low level stop valve 40 reach trunk line 50, discharges through drainage pipe 20, connects at the lowest, can guarantee to arrange the pressurized water that remains in the low level stop valve 40 to the greatest extent, and drainage pipe 20 can be DN65 pipeline.
In this embodiment, a pipe seat 60 is disposed at the connection position between the drain pipe 20 and the main pipe 50, and the pipe seat 60 is respectively fixedly connected to the drain pipe 20 and the main pipe 50. One end of the drain pipe 20 is connected to the main pipe 50, and the other end is connected to the drain header 70. The pipe seat 60 is arranged at the joint of the drainage pipeline 20 and the drainage header 70, and the pipe seat 60 is fixedly connected with the drainage pipeline 20 and the drainage header 70 respectively. The tube seat 60 is adopted, so that the connection is convenient, and the connection strength can be improved. The stem 60 may be a phi 76 x 5mm, 12Cr1MoVG stem 60.
In this embodiment, valves may be disposed on both the water inlet pipeline 10 and the water outlet pipeline 20 to control the water inlet pipeline 10 and the water outlet pipeline 20, and in this embodiment, the valves are disposed on the water outlet pipeline 20, wherein the valves may be disposed on the water inlet end and the water outlet end of the water outlet pipeline 20, and the valves include a manual valve 21 and an electric valve 22. Wherein the manual valve 21 is located at the water inlet end of the drain pipe 20. An electric valve 22 is located at the water outlet end of the water discharge pipe 20.
The valve is disposed on the drainage pipeline 20 to facilitate control of the drainage pipeline 20, for example, when the drainage pipeline 20 is opened to drain water, or the drainage pipeline 20 is closed, the valve disposed on the water inlet end of the drainage pipeline 20 can prevent the drainage of the pressurized water from the drainage pipeline 20 when the pressurized water is introduced into the low-level block valve 40, and the valve disposed on the water outlet end of the drainage pipeline 20 is disposed to protect the drainage header 70, and meanwhile, the valve disposed on the water inlet end of the drainage pipeline 20 is also convenient for cleaning or maintaining the drainage pipeline 20, and if the drainage pipeline 20 needs to be cleaned or maintained, the valve disposed on the water inlet end of the drainage pipeline 20 is closed to cut off the connection with the main pipeline 50.
The water inlet end of the drainage pipeline 20 is close to the main pipeline 50 and the low-level blocking valve 40, so that manual operation is convenient, a manual valve 21 can be arranged, and the water outlet end of the drainage pipeline 20 is provided with an electric valve 22, so that automatic control is convenient.
The utility model discloses in need when overhauing low level stifled valve 40, open low level stifled valve 40's gland 41, will detect closure plate 30 and place in low level stifled valve 40, with low level stifled valve 40 shutoff, let in to low level stifled valve 40 through inlet channel 10 and had the pressurized-water, carry out water pressure test to the reheater of low level stifled valve 40 and unit, the utility model discloses bear dynamic pressure 5MPa, static pressure 0.35MPa during well water pressure test. After the hydrostatic test, close inlet channel 10, open drainage pipe 20, through drainage pipe 20 with the pressure water discharge in the low level stop valve 40, then demolish the detection closure plate 30 of low level stop valve 40, can arrange the inside pressure water of reserving of low level stop valve 40 to the greatest extent with high efficiency, guarantee maintenance operation safety realizes each item and overhauls the target. After the maintenance is finished, the detection blocking plate 30 in the low-position blocking valve 40 is detached, and steam is introduced into the main pipeline 50.
The utility model discloses a generating set boiler low level stop valve safety inspection system, the scene is easily arranged, and installation, welding process are ripe, and the quality can obtain guaranteeing, and the system is simple, convenient operation, maintenance volume are little. After the boiler secondary steam system hydraulic pressure test is carried out each time, the electric valve 22 on the drainage pipeline 20 can be opened, the pressurized water remained in the main pipeline 50 of the secondary steam system and the low-position blocking valve 40 can be effectively drained, the safety of the overhaul operation of the low-position blocking valve 40 can be guaranteed, the grid-connected power generation is carried out 1-1.5 days in advance, and the efficiency is increased by more than 300 ten thousand yuan.
The utility model discloses what the key description in the above embodiment is different between each embodiment, and different optimization characteristics are as long as not contradictory between each embodiment, all can make up and form more preferred embodiment, consider that the literary composition is succinct, then no longer describe here.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a generating set boiler low level stifled valve safety maintenance system, its characterized in that, includes inlet channel (10), drainage pipe (20) and detects closure plate (30), inlet channel (10) with drainage pipe (20) are located the same one side of low level stifled valve (40), inlet channel (10) with drainage pipe (20) respectively with low level stifled valve (40) intercommunication, it sets up to detect closure plate (30) be used for the shutoff in low level stifled valve (40).
2. The safety maintenance system of a generator set boiler low-level block valve according to claim 1, characterized in that the low-level block valve (40) is installed on a main pipeline (50), and the water inlet pipeline (10) and the water discharge pipeline (20) are respectively connected with the main pipeline (50).
3. The safety-repair system for low-level plugging valves of generator set boilers as claimed in claim 2, characterized in that the connection of said drainage pipeline (20) and said main pipeline (50) is located at the lowest position of said main pipeline (50).
4. The safety maintenance system for the low-position blocking valve of the generator set boiler as claimed in claim 3, wherein a pipe seat (60) is arranged at the joint of the drainage pipeline (20) and the main pipeline (50), and the pipe seat (60) is fixedly connected with the drainage pipeline (20) and the main pipeline (50) respectively.
5. The safety maintenance system of a generator set boiler low-level block valve according to claim 3, characterized in that one end of the drainage pipeline (20) is connected with the main pipeline (50), and the other end is connected with a drainage header (70).
6. The safety maintenance system for the low-position block valve of the generator set boiler as claimed in claim 5, wherein a pipe seat (60) is arranged at the joint of the drainage pipeline (20) and the drainage header (70), and the pipe seat (60) is fixedly connected with the drainage pipeline (20) and the drainage header (70) respectively.
7. The safety maintenance system of the generator set boiler low-level block valve according to claim 3, characterized in that a valve is arranged on the drainage pipeline (20).
8. The safety maintenance system for the low-level block valve of the generator set boiler as claimed in claim 7, wherein the water inlet end and the water outlet end of the water discharge pipeline (20) are respectively provided with a valve, and the valves comprise a manual valve (21) and an electric valve (22).
9. The safety maintenance system of a generator set boiler low-level block valve according to claim 8, characterized in that the manual valve (21) is arranged at the water inlet end of the water discharge pipeline (20).
10. The safety maintenance system of the generator set boiler low-level block valve as claimed in claim 8, characterized in that the electric valve (22) is arranged at the water outlet end of the water discharge pipeline (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023055697.2U CN213983013U (en) | 2020-12-16 | 2020-12-16 | Safety maintenance system for low-position block valve of generator set boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023055697.2U CN213983013U (en) | 2020-12-16 | 2020-12-16 | Safety maintenance system for low-position block valve of generator set boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213983013U true CN213983013U (en) | 2021-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023055697.2U Active CN213983013U (en) | 2020-12-16 | 2020-12-16 | Safety maintenance system for low-position block valve of generator set boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213983013U (en) |
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2020
- 2020-12-16 CN CN202023055697.2U patent/CN213983013U/en active Active
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