Active turn-off type regulating valve with low inlet and high outlet medium flow direction
By designing an active shut-off regulating valve with a low-inlet and high-outlet medium flow direction, and using a pre-start valve core and disc spring structure to reduce the valve core opening force, the problems of sealing surface wear and internal leakage of high-pressure and large-diameter stop valves are solved, and the service life and sealing performance of the valve are improved.
Patent Information
- Application Number
- CN202423205516.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-12-25
AI Technical Summary
The medium flow direction of the high-pressure large-diameter stop valves in existing thermal power plants is a high-inlet and low-outlet design, which results in a large valve opening force, easy wear of the sealing surface, and internal leakage, causing short-term valve failure.
An active shut-off regulating valve with low inlet and high outlet medium flow direction is designed. The lifting force required to open the valve core is reduced by cooperating with the pre-start valve core and the disc spring. The pre-start valve core moves upward in the pre-through groove to open the pre-through hole, thereby reducing the pressure difference inside the valve body.
It effectively reduces the lifting force required to open the valve core, reduces the wear of the sealing surface, and improves the service life and sealing performance of the valve.
Smart Images
Figure CN223424657U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to valve technical field, concretely relates to a low incoming high outgoing medium flow direction's active closing type regulating valve. BACKGROUND
[0002] The closing type regulating valve is a special valve, which combines the functions of a stop valve and a regulating valve. In a thermal power plant, this valve can be used as a stop valve to completely cut off the fluid passage, or as a regulating valve to adjust the flow and pressure by changing the opening degree of the valve. This design makes the closing type regulating valve have a wide range of applications in thermal power plants.
[0003] The existing stop valve for high pressure and large diameter in the thermal power plant mostly adopts the structure with high incoming low outgoing medium flow direction, although the closing force is reduced, but the opening force of the valve is increased, and the fluid flushing of the valve seat sealing surface is more serious, which is easy to cause internal leakage and make the stop valve fail in a short period of time. Therefore, we propose a low incoming high outgoing medium flow direction's active closing type regulating valve. UTILITY MODEL CONTENTS
[0004] The utility model discloses a low incoming high outgoing medium flow direction's active closing type regulating valve to solve the problem in the background art.
[0005] To achieve the above object, the utility model provides the following technical scheme: a low incoming high outgoing medium flow direction's active closing type regulating valve, including the valve body and actuator, the upper of valve body is equipped with support cage, the upper of support cage is equipped with valve cover, the inboard of valve cover is equipped with installation groove, the inboard of valve body and valve cover is equipped with valve stem, the inboard of installation groove is equipped with spring, the side of valve body is equipped with water outlet, the bottom of valve body is equipped with import, the inboard of valve body is equipped with main valve core, the inboard of main valve core is equipped with pre-pass groove, the inboard of pre-pass groove is equipped with pre-opening valve core, the upper of pre-opening valve core is equipped with disc spring, the bottom of main valve core is equipped with pre-pass hole, the inboard of valve body is equipped with cavity, the side of cavity is equipped with sealing surface.
[0006] Preferably, the upper of the valve body is fixedly connected with the valve cover through the support cage, and the inboard of the valve cover is fixedly provided with the installation groove.
[0007] Preferably, the valve stem is arranged in the inboard of the installation groove, the upper end of the spring is fixedly connected with the inner top end of the installation groove, and the spring is sleeved on the surface of the valve stem.
[0008] Preferably, the inboard of the valve body close to the import is movably connected with the main valve core, and the inboard of the main valve core is fixedly provided with the pre-pass groove.
[0009] Preferably, the top of the pre-start valve core is fixedly connected to the bottom end of the valve stem, disc springs are fixedly connected to the upper sides of the pre-start valve core, the top of the disc spring is fixedly connected to the upper inner side of the pre-through groove, and a pre-through hole is opened through the bottom surface of the main valve core.
[0010] Preferably, a cavity is communicated between the inlet and the water outlet, a valve seat is connected between the bottom of the cavity and the top of the inlet, and a sealing surface is fixedly connected to the edge of the center hole of the valve seat.
[0011] Compared with the prior art, the beneficial effects of the present invention are:
[0012] The lifting of the valve stem will first drive the pre-start valve core to move upward inside the pre-through groove and compress the disc spring. After moving upward, the pre-start valve core will first open the pre-through hole below, allowing a small amount of medium to enter the pre-through groove and the inside of the cavity to reduce the pressure difference between the front and back of the valve body, thereby reducing the lifting force required to open the main valve core. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the overall internal cross-section structure of the utility model;
[0014] Figure 2 For the utility model Figure 1 Schematic diagram of the structure at A in the middle;
[0015] Figure 3 For the utility model Figure 1 Schematic diagram of the structure at point B in the middle.
[0016] In the figure: 1. Valve body; 2. Valve cover; 3. Mounting groove; 4. Valve stem; 5. Spring; 6. Support cage; 7. Inlet; 8. Water outlet; 9. Main valve core; 10. Pre-through groove; 11. Pre-start valve core; 12. Disc spring; 13. Pre-through hole; 14. Sealing surface; 15. Cavity; 16. Valve seat; 17. Actuator. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0018] See also Figure 1-3The utility model provides a technical solution: an active shut-off regulating valve with low-inlet and high-outlet medium flow direction, comprising a valve body 1 and an actuator 17, a support cage 6 is provided above the valve body 1, a valve cover 2 is provided above the support cage 6, a mounting groove 3 is provided on the inner side of the valve cover 2, a valve stem 4 is provided on the inner side of the valve body 1 and the valve cover 2, a spring 5 is provided on the inner side of the mounting groove 3, a water outlet 8 is provided on one side of the valve body 1, an inlet 7 is provided at the bottom of the valve body 1, a main valve core 9 is provided on the inner side of the valve body 1, a pre-through groove 10 is provided on the inner side of the main valve core 9, a pre-start valve core 11 is provided on the inner side of the pre-start valve core 11, a disc spring 12 is provided above the pre-start valve core 11, a pre-through hole 13 is provided at the bottom of the main valve core 9, a cavity 15 is provided on the inner side of the valve body 1, and a sealing surface 14 is provided on one side of the cavity 15.
[0019] Specifically, the top of the valve body 1 and the valve cover 2 are fixedly connected through a support cage 6, the inner side of the valve cover 2 is fixedly provided with a mounting groove 3, the valve stem 4 is passed through the inner side of the mounting groove 3, the upper end of the spring 5 is fixedly connected to the inner top of the mounting groove 3, and the spring 5 is sleeved on the surface of the valve stem 4. The inner side of the valve body 1 near the inlet 7 is movably connected with the main valve core 9, and a pre-through groove 10 is fixedly provided on the inner side of the main valve core 9. The top of the pre-start valve core 11 is fixedly connected to the bottom end of the valve stem 4, and disc springs 12 are fixedly connected to the upper sides of the pre-start valve core 11. The top of the disc spring 12 is fixedly connected to the upper inner side of the pre-through groove 10, and a pre-through hole 13 is penetrated through the bottom surface of the main valve core 9. A cavity 15 is communicated between the inlet 7 and the water outlet 8. The bottom of the cavity 15 is connected to the top of the inlet 7 with a valve seat 16, and the edge of the center hole of the valve seat 16 is fixedly connected to a sealing surface 14.
[0020] In this embodiment, the lifting operation mechanism of the valve stem 4 is an existing technology, which is not described in detail in the document. When it is used, when the actuator 17 assembly drives the valve stem 4 to lift, it will simultaneously drive the pre-start valve core 11 to move upward inside the pre-through groove 10. The valve stem 4 will compress the spring 5 in the installation groove 3 during the lifting period, and the pre-start valve core 11 will compress the disc spring 12 during the upward movement. After the pre-start valve core 11 moves upward, it will open the lower pre-through hole 13, allowing a small amount of medium to enter the pre-through groove 10 and the cavity 15, so as to reduce the pressure difference before and after the valve body 1, thereby reducing The lifting force required to open the main valve core 9 is small. After the pre-start valve core 11 moves upward continuously, it will exert an upward force on the upper part of the pre-through groove 10, thereby driving the main valve core 9 to move upward, and then opening the channel between the inlet 7 and the cavity 15, so that the medium in the inlet 7 is discharged from the inside of the outlet 8. When the valve stem 4 drops, the spring 5 will drive the valve stem 4 to reset, and the disc spring 12 drives the pre-start valve core 11 to reset. After the main valve core 9 abuts against the sealing surface 14, it can isolate the cavity 15 and the inlet 7, and the pre-start valve core 11 isolates the pre-through hole 13 to achieve the effect of active closing.
[0021] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An active shut-off regulating valve with low inlet and high outlet medium flow direction, comprising a valve body (1) and an actuator (17), characterized in that: A support cage (6) is provided above the valve body (1), a valve cover (2) is provided above the support cage (6), a mounting groove (3) is provided on the inner side of the valve cover (2), a valve stem (4) is provided on the inner side of the valve body (1) and the valve cover (2), a spring (5) is provided on the inner side of the mounting groove (3), a water outlet (8) is provided on one side of the valve body (1), an inlet (7) is provided on the bottom of the valve body (1), a main valve core (9) is provided on the inner side of the valve body (1), a pre-through groove (10) is provided on the inner side of the main valve core (9), a pre-start valve core (11) is provided on the inner side of the pre-through groove (10), a disc spring (12) is provided above the pre-start valve core (11), a pre-through hole (13) is provided on the bottom of the main valve core (9), a cavity (15) is provided on the inner side of the valve body (1), and a sealing surface (14) is provided on one side of the cavity (15).
2. The active shut-off regulating valve with low inlet and high outlet medium flow direction according to claim 1, characterized in that: The upper portion of the valve body (1) is fixedly connected to the valve cover (2) via a support cage (6), and a mounting groove (3) is fixedly provided on the inner side of the valve cover (2).
3. The active shut-off regulating valve with low inlet and high outlet medium flow direction according to claim 1, characterized in that: The valve stem (4) is inserted into the inner side of the mounting groove (3), the upper end of the spring (5) is fixedly connected to the inner top end of the mounting groove (3), and the spring (5) is sleeved on the surface of the valve stem (4).
4. The active shut-off regulating valve with low inlet and high outlet medium flow direction according to claim 1, characterized in that: The inner side of the valve body (1) close to the inlet (7) is movably connected to a main valve core (9), and a pre-through groove (10) is fixedly opened on the inner side of the main valve core (9).
5. The active shut-off regulating valve with low inlet and high outlet medium flow direction according to claim 1, characterized in that: The top end of the pre-start valve core (11) is fixedly connected to the bottom end of the valve stem (4), disc springs (12) are fixedly connected to the upper sides of both sides of the pre-start valve core (11), the top end of the disc spring (12) is fixedly connected to the upper inner side of the pre-through groove (10), and a pre-through hole (13) is opened through the bottom surface of the main valve core (9).
6. The active shut-off regulating valve with low inlet and high outlet medium flow direction according to claim 1, characterized in that: A cavity (15) is connected between the inlet (7) and the water outlet (8), the bottom of the cavity (15) and the top of the inlet (7) are connected to a valve seat (16), and the edge of the center hole of the valve seat (16) is fixedly connected to a sealing surface (14).