High-pressure bypass valve
By designing the round blocks and round grooves on the surface of the tungsten carbide layer in a high-pressure bypass valve, the steam leakage problem caused by valve core erosion is solved, the erosion resistance and service life are improved, and the maintenance cost is reduced.
Patent Information
- Application Number
- CN202421231357.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-05-31
AI Technical Summary
After long-term use of high-pressure bypass valve, the valve core is prone to erosion problems, resulting in steam leakage and affecting the safe operation and efficiency of the unit.
A high-pressure bypass valve is designed, with a cavity inside its shell, and steam inlets and outlets are respectively provided at both ends of the cavity. The push rod drives the block to abut or separate from the abutment seat. The block can be detached and arranged on a round table. Tungsten carbide layer is provided on the surface of the block, the round block and the round groove to improve the erosion resistance.
It improves the erosion resistance of high-pressure bypass valves, extends service life, and facilitates replacement of the tile blocks and rings after erosion occurs, reducing maintenance costs.
Smart Images
Figure CN222526887U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of valves, and in particular relates to a high-pressure bypass valve. Background Art
[0002] High-pressure bypass valves are very important equipment, which play an important role in improving the startup performance of the unit, shortening the startup time of the unit, reducing the thermal loss during startup, and achieving the best startup of the unit. After long-term use, the valve core of the high-pressure bypass valve is prone to erosion problems, resulting in steam leakage. The internal leakage of the valve causes the new steam to leak directly to the back of the valve during normal operation. The long-term over-temperature operation of the pipeline behind the valve will cause creep damage, threatening the safe operation of the unit. The high-speed, small-flow fluid leaking from the valve will continuously flush the valve core, the valve seat sealing surface, and the valve cage, which will increase the valve leakage, causing the unit load to be restricted or even unplanned shutdown. Utility Model Content
[0003] Aiming at the technical problem of valve core erosion in the existing high-pressure bypass valve, the utility model provides a high-pressure bypass valve, which has good erosion resistance and is easy to repair after erosion occurs.
[0004] The utility model provides a high-pressure bypass valve, including an actuator, a push rod, a shell, a blocking block and an abutment seat, a cavity is formed inside the shell, a steam inlet and a steam outlet connected to two ends of the cavity are arranged on the shell, the actuator is connected to the push rod, the push rod is connected to the blocking block, the blocking block and the abutment seat are arranged in the cavity, the abutment seat is fixed on the inner wall of the cavity, the push rod drives the blocking block to abut or separate from the abutment seat, the end of the blocking block away from the push rod is detachably provided with a truncated cone block, the surface of the truncated cone block is provided with a first tungsten carbide layer, the abutment seat is provided with a groove, a circular ring is detachably embedded in the groove, a truncated cone groove matched with the truncated cone block is opened in the middle of the circular ring, and a second tungsten carbide layer is provided on the inner wall of the truncated cone groove.
[0005] Furthermore, the actuator is an electric structure, and the actuator can detachably block one end of the cavity.
[0006] Furthermore, the truncated cone block and the blocking block are connected to each other by arranging bolts.
[0007] When the high-pressure bypass valve is in the opening stage, high-pressure steam enters the cavity from the steam inlet, passes through the truncated cone groove and is discharged from the steam outlet. When the actuator drives the truncated cone block to embed into the truncated cone groove, the truncated cone groove is closed and the high-pressure bypass valve is closed. A first tungsten carbide layer and a second tungsten carbide layer are provided on the surface of the truncated cone block and the truncated cone groove, which can effectively improve the erosion resistance of the truncated cone block and the truncated cone groove and increase the service life. Even if erosion occurs, the truncated cone block and the ring can be directly replaced to reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0009] Figure 1 The figure is a structural schematic diagram of a high-pressure bypass valve. DETAILED DESCRIPTION
[0010] The utility model discloses a high-pressure bypass valve, which has good erosion resistance and is easy to repair after erosion occurs.
[0011] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution in the utility model. Obviously, what is described is only a part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0012] See also Figure 1As shown, the utility model discloses a high-pressure bypass valve, including an actuator 13, a push rod 8, a shell 11, a block 7 and an abutment seat 3, a cavity 12 is formed inside the shell 11, a steam inlet 9 and a steam outlet 10 connected to the two ends of the cavity 12 are arranged on the shell 11, the actuator 13 is connected to the push rod 8, the push rod 8 is connected to the block 7, the block 7 and the abutment seat 3 are arranged in the cavity 12, the abutment seat 3 is fixed on the inner wall of the cavity 12, the block 7 is driven by the push rod 8 to abut or separate from the abutment seat 3, the end of the block 7 away from the push rod 8 is detachably provided with a truncated cone block 1, the surface of the truncated cone block 1 is provided with a first tungsten carbide layer 6, the abutment seat 3 is provided with a groove, a ring 2 is detachably embedded in the groove, a truncated cone groove 5 matched with the truncated cone block 1 is opened in the middle of the ring 2, and a second tungsten carbide layer 4 is provided on the inner wall of the truncated cone groove 5.
[0013] The actuator 13 is an electric structure, and the actuator 13 can detachably block one end of the cavity 12 .
[0014] The truncated cone block 1 and the blocking block 7 are connected to each other by bolts.
[0015] When the high-pressure bypass valve is in the opening stage, high-pressure steam enters the cavity 12 from the steam inlet 9, passes through the truncated cone groove 5 and is discharged from the steam outlet 10. When the actuator 13 drives the truncated cone block 1 to embed into the truncated cone groove 5, the truncated cone groove 5 is closed and the high-pressure bypass valve is closed. A first tungsten carbide layer 6 and a second tungsten carbide layer 4 are provided on the surface of the truncated cone block 1 and the truncated cone groove 5, which can effectively improve the erosion resistance of the truncated cone block 1 and the truncated cone groove 5 and increase the service life. Even if erosion occurs, the truncated cone block 1 and the ring 2 can be directly replaced to reduce maintenance costs.
[0016] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.
Claims
1. A high pressure bypass valve, characterized in that: It includes an actuator, a push rod, a shell, a block and an abutment seat, a cavity is formed inside the shell, a steam inlet and a steam outlet connected to two ends of the cavity are arranged on the shell, the actuator is connected to the push rod, the push rod is connected to the block, the block and the abutment seat are arranged in the cavity, the abutment seat is fixed on the inner wall of the cavity, the push rod drives the block to abut or separate from the abutment seat, the end of the block away from the push rod is detachably provided with a truncated cone block, the surface of the truncated cone block is provided with a first tungsten carbide layer, the abutment seat is provided with a groove, a ring is detachably embedded in the groove, a truncated cone groove matched with the truncated cone block is opened in the middle of the ring, and the inner wall of the truncated cone groove is provided with a second tungsten carbide layer.
2. A high pressure bypass valve according to claim 1, characterized in that: The actuator is an electric structure, and the actuator can detachably block one end of the cavity.
3. A high pressure bypass valve according to claim 1, characterized in that: The truncated cone block and the blocking block are connected to each other by bolts.