CN210859931U - Water pressure clamp for reheating safety valve of boiler - Google Patents
Water pressure clamp for reheating safety valve of boiler Download PDFInfo
- Publication number
- CN210859931U CN210859931U CN201921196180.XU CN201921196180U CN210859931U CN 210859931 U CN210859931 U CN 210859931U CN 201921196180 U CN201921196180 U CN 201921196180U CN 210859931 U CN210859931 U CN 210859931U
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- valve
- rod
- connecting rod
- safety valve
- relief valve
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Abstract
The utility model provides a boiler reheat relief valve water pressure fixture, reheat relief valve include pulse valve and main relief valve, and main relief valve links to each other with mixing header (10) again, is equipped with valve rod (7) in the main relief valve, and valve rod (7) lower extreme passes valve seat (8) and installs valve clack (9); a piston (6) is arranged at the upper part of the valve rod (7), and the top end of the valve rod (7) extends out of the safety valve air chamber (5); be equipped with dust cover (4), characterized by on air chamber (5): reinforcing plate (2) are installed to dust cover (4) upside, are equipped with connecting rod (3) in the middle of reinforcing plate (2), and connecting rod (3) are the screw rod, and connecting rod (3) upper end is equipped with lock nut (1), and connecting rod (3) lower extreme is equipped with the screw thread with valve rod (7) top adaptation, connecting rod (3) and valve rod (7) screw thread rigid coupling, the utility model discloses guarantee that the relief valve is in the closed condition, leak water phenomenon when avoiding hydrostatic test, can effectively improve hydrostatic test's qualification rate.
Description
Technical Field
The utility model relates to a boiler reheat relief valve.
Background
The boiler in use in the power plant comprises a reheater and a remixing header, wherein the reheater and the remixing header are connected through a pipeline, and pulse safety valves are arranged on connecting pipelines of the reheater and the remixing header. The pulse safety valve comprises a pulse valve and a main safety valve, the reheat pipeline is connected with the pulse valve, the pulse valve is connected with the main safety valve through a pipeline, and the main safety valve is installed on a pipeline of the mixing tank.
When the boiler pressure is normal, the sealing surface of the valve seat and the valve clack inside the main safety valve is closed due to the side pressure of the re-mixing box, and the main safety valve keeps a closed state. When the pressure in the boiler exceeds an allowable value, the pulse valve is opened firstly, steam enters the upper part of the piston chamber of the main safety valve, the piston of the main safety valve is pressed downwards to open the main safety valve, and then the pressure of the mixed box is relieved through the main safety valve. When the redundant steam is discharged, the steam pressure of the reheater is reduced to a certain value, the pulse valve is closed, the steam entering the piston of the main safety valve is cut off, and the main safety valve is restored to a closed state under the action of the pressure on the side of the re-mixing header.
When the unit is stopped, the pressure in the furnace is negative pressure, no pressure exists in the mixing box, and the valve clack and the valve seat sealing surface in the valve body of the main safety valve cannot be in a closed state. When the boiler hydraulic pressure test is carried out, test water leaks to the main safety valve from the remixing tank and then flows to the outside along the exhaust funnel. The continuous water leakage in the hydraulic test process causes water resource waste, and the sealing surface of the main safety valve is easy to damage due to water scouring, so that the safety valve is internally leaked.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is that, during boiler hydrostatic test, the unable seal of main relief valve leads to the water waste, easily causes the problem that the relief valve damaged.
In order to solve the technical problem, the utility model provides a technical scheme is:
a boiler reheating safety valve water pressure fixture comprises a pulse valve and a main safety valve, wherein the main safety valve is connected with a remixing box, a valve rod is arranged in the main safety valve, and a valve clack is arranged at the lower end of the valve rod and penetrates through a valve seat; the upper part of the valve rod is provided with a piston, and the top end of the valve rod extends out of the safety valve air chamber; be equipped with the dust cover on the air chamber, the reinforcing plate is installed to the dust cover upside, is equipped with the connecting rod in the middle of the reinforcing plate, and the connecting rod upper end is equipped with the lock mother, connecting rod lower extreme and valve rod screw thread rigid coupling.
The utility model provides a fixture is installed on the reheat relief valve before boiler hydrostatic test, guarantees that the relief valve is in the closed condition, and the water leakage phenomenon when avoiding hydrostatic test can effectively improve hydrostatic test's qualification rate.
Drawings
Fig. 1 is a structural diagram of the present invention.
In the figure, a lock nut-1; a reinforcing plate-2; a connecting rod-3; a dust cover-4; a gas chamber-5; a piston-6; a valve stem-7; a valve seat-8; a valve clack-9; a remixing header-10; pulse valve-11
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings. The drawings provided by the utility model only show one or some embodiment structures of the technical scheme, and the drawings are simple structure diagrams of the tool, so that only parts with main functions are shown. Please understand the technical solution of the present invention comprehensively with reference to the drawings and the text.
The valve body shown in fig. 1 is a part of a pulse safety valve of a boiler, and the pulse safety valve comprises a pulse valve and a main safety valve, and is shown as a main safety valve structure. The reheat pipeline is connected with a pulse valve 11, the pulse valve 11 is connected with a main safety valve through a pipeline, and the main safety valve is installed on a pipeline of the mixing box 10.
As shown in fig. 1, the fixture for the water pressure of the reheating safety valve of the boiler comprises a pulse valve and a main safety valve, wherein the main safety valve is connected with a remixing tank 10, a valve rod 7 is arranged in the main safety valve, and a valve flap 9 is arranged at the lower end of the valve rod 7 and penetrates through a valve seat 8; the upper part of the valve rod 7 is provided with a piston 6, and the top end of the valve rod 7 extends out of the safety valve air chamber 5; be equipped with dust cover 4 on air chamber 5, 4 upsides in the dust cover are installed and are strengthened board 2, are equipped with connecting rod 3 in the middle of strengthening board 2, and connecting rod 3 is the screw rod, and 3 upper ends of connecting rod are equipped with lock nut 1, and 3 lower extremes of connecting rod are equipped with the screw thread with 7 top adaptations of valve rod, connecting rod 3 and 7 screw thread rigid couplings of valve rod.
The utility model discloses installation method: the external dust cover 4 of the main safety valve is removed; screwing the threaded ends of the connecting rod 3 and the valve rod 7 to connect the connecting rod 3 and the valve rod 7 into a whole; then, the dust cover 4 is installed again, the reinforcing plate 2 is sleeved on the connecting rod 3, the lock nut 1 is installed at the upper end of the connecting rod 3, after the lock nut 1 fastens the connecting rod 3, the reinforcing plate 2 is pressed on the dust cover 4, and the valve rod 7 is pulled to the highest position to enable the valve clack 9 in the valve body to be tightly combined with the valve seat 8.
The utility model discloses a theory of operation does: valve rod 7 and connecting rod 3 are as an organic whole through threaded connection, and the cooperation of lock nut 1 and connecting rod 3 is upwards drawn valve rod 7, and reinforcing plate 2 is fixed as spacing, guarantees valve clack 3 and the sealed face of disk seat 8 and combines closely.
The utility model has the characteristics of easy and simple to handle, use nimble. This card is safe before boiler hydrostatic test to the boiler relief valve on, makes main relief valve keep closing, prevents effectively that the phenomenon of running out from taking place, can improve hydrostatic test's qualification rate, extension relief valve life.
Claims (1)
1. A boiler reheating safety valve water pressure fixture comprises a pulse valve and a main safety valve, wherein the main safety valve is connected with a remixing tank (10), a valve rod (7) is arranged in the main safety valve, and a valve clack (9) is arranged at the lower end of the valve rod (7) through a valve seat (8); a piston (6) is arranged at the upper part of the valve rod (7), and the top end of the valve rod (7) extends out of the safety valve air chamber (5); be equipped with dust cover (4), characterized by on air chamber (5): reinforcing plate (2) are installed to dust cover (4) upside, are equipped with connecting rod (3) in the middle of reinforcing plate (2), and connecting rod (3) are the screw rod, and connecting rod (3) upper end is equipped with lock mother (1), and connecting rod (3) lower extreme is equipped with the screw thread with valve rod (7) top adaptation, connecting rod (3) and valve rod (7) screw thread rigid coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921196180.XU CN210859931U (en) | 2019-07-26 | 2019-07-26 | Water pressure clamp for reheating safety valve of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921196180.XU CN210859931U (en) | 2019-07-26 | 2019-07-26 | Water pressure clamp for reheating safety valve of boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210859931U true CN210859931U (en) | 2020-06-26 |
Family
ID=71298101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921196180.XU Active CN210859931U (en) | 2019-07-26 | 2019-07-26 | Water pressure clamp for reheating safety valve of boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210859931U (en) |
-
2019
- 2019-07-26 CN CN201921196180.XU patent/CN210859931U/en active Active
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