Novel valve protection device

Abstract

The utility model discloses a novel valve protection device which comprises an inlet throttling orifice plate, a device shell, a valve cage and an outlet throttling orifice plate, and the two ends of the device shell are connected with the inlet throttling orifice plate and the outlet throttling orifice plate which are coaxial with the device shell respectively. A plurality of valve cages are arranged between the inlet throttling orifice plate and the outlet throttling orifice plate, and a plurality of steam outlet holes are formed in the surfaces of the valve cages. The phenomenon that valves, especially high-pressure valves and ultrahigh-pressure valves in China are limited by European and American countries is avoided, and the European and American countries are supposed to be advanced in technology, excellent in processing and monopoly in the valve market in the world.

Description

Technical Field

[0001] This utility model relates to a protection device, specifically a novel valve protection device. Background Technology

[0002] In the high-voltage systems of power generation, there are numerous high-pressure valves. Among them, tens of thousands of valves withstand large pressure drops and are operated frequently. Due to the large pressure drops they endure, the sealing surfaces of these valves are easily damaged by the working fluid through erosion and cavitation. Harsh working conditions, frequent operation, severe damage, high leakage rate, frequent replacement, and high price are common characteristics of these valves, resulting in serious leaks and spills in power companies. Utility Model Content

[0003] The purpose of this invention is to provide a novel valve protection device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A novel valve protection device includes an inlet orifice plate, a housing, a valve cage, and an outlet orifice plate. The two ends of the housing are respectively connected to the inlet orifice plate and the outlet orifice plate, which are coaxial with it. Multiple valve cages are arranged between the inlet orifice plate and the outlet orifice plate, and several steam outlet holes are opened on the surface of the valve cage.

[0006] As a further embodiment of this utility model: the outer shell of the device is inserted into the valve and the valve connection.

[0007] As a further embodiment of this utility model: a throttling orifice A is formed in the middle of the inlet throttling orifice plate, and the diameter of the input end of the throttling orifice A is larger than the diameter of the output end.

[0008] As a further embodiment of this utility model: a throttling orifice B is formed in the middle of the outlet throttling orifice plate, and the diameter of the input end of the throttling orifice B is smaller than the diameter of the output end.

[0009] As a further embodiment of this utility model: the steam outlet is a stepped hole, and the larger diameter half-hole in the stepped hole is located on the outer surface of the valve cage.

[0010] As a further embodiment of this utility model: the main body of the valve cage is a cylindrical structure with one end open and the other end closed, and the opening end of the valve cage is fixedly connected to the center hole of the flange.

[0011] As a further embodiment of this utility model: one end of each flange is connected to one end of a positioning sleeve B; the end of the flange facing the outlet throttling orifice plate is connected to the positioning sleeve B, and the other end of the positioning sleeve B is engaged with a groove opened on the corresponding end face of the adjacent flange or a groove opened at the end of the outlet throttling orifice plate, while the inlet throttling orifice plate is engaged with the adjacent flange by a positioning sleeve A. The valve cage is positioned and fixed inside the device housing by the setting of positioning sleeve B and positioning sleeve A.

[0012] As a further embodiment of this utility model: the inlet throttling orifice plate, the device housing, the valve cage, the outlet throttling orifice plate, the positioning sleeve A, the flange, and the positioning sleeve B are all heat-treated.

[0013] This invention relates to a novel valve protection device developed specifically for domestically produced high-differential-pressure valves that lack protective mechanisms. It effectively prevents valve erosion and cavitation damage, completely surpassing the technologies of American FISHER and German ROSITER in this area. This technology can fundamentally solve the problems of low price, poor quality, and susceptibility to failure in domestic high-pressure valves, breaking the monopoly of European and American countries in high-pressure valve technology. It can save domestic power companies significant costs, eliminate safety hazards in power generating units, and reduce the workload of maintenance personnel in domestic power companies.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This practical application will fill the gap in my country's valve industry, especially in high-pressure and ultra-high-pressure valves, where China is dependent on Europe and the United States. Europe and the United States rely on their advanced technology and excellent processing to maintain a monopoly in the world valve market.

[0016] We can:

[0017] (1) It reduces the thermal energy efficiency lost by power companies due to leakage caused by valve cavitation erosion;

[0018] (2) It eliminated the safety hazards caused by valve cavitation and erosion damage in power companies;

[0019] (3) It reduced the labor intensity of power company maintenance personnel;

[0020] (4) It ensured civilized production in the enterprise;

[0021] (5) It protected the environment; Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a new type of valve protection device. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 In this embodiment of the utility model, a novel valve protection device includes an inlet throttling orifice plate 1, a device housing 2, a valve cage 3, a steam outlet orifice 4, an outlet throttling orifice plate 5, a positioning sleeve A6, a flange 7, and a positioning sleeve B8.

[0025] The outer shell 2 of the device is cylindrical, and the two ends of the outer shell 2 are respectively connected to the inlet throttling orifice plate 1 and the outlet throttling orifice plate 5, which are coaxial with it. The inlet throttling orifice plate 1 and the outlet throttling orifice plate 5 are both formed by opening through holes 9 in the plate. The inlet throttling orifice plate 1 and the outlet throttling orifice plate 5 can be welded to the inner wall of the outer shell 2.

[0026] The device housing 2 houses the valve and the valve connection.

[0027] Specifically:

[0028] A throttling orifice A11 is formed in the middle of the inlet throttling orifice plate 1, and the diameter of the input end of the throttling orifice A11 is larger than the diameter of the output end.

[0029] A throttling orifice B51 is formed in the middle of the outlet throttling orifice plate 5, and the diameter of the input end of the throttling orifice B51 is smaller than the diameter of the output end.

[0030] Multiple valve cages 3 are installed between the inlet orifice plate 1 and the outlet orifice plate 5, and the multiple valve cages 3 are arranged in the same direction inside the device housing 2. The main body of the valve cage 3 is a cylindrical structure with one end open and the other end closed. Several steam outlet holes 4 are opened on the surface of the valve cage 3. The open end of the valve cage 3 is fixedly connected to the center hole of the flange 7. The working fluid enters from the inlet orifice plate 1, passes through multiple valve cages 3, and finally exits from the outlet orifice plate 5. Similar to the multi-stage pressure reduction principle of a steam seal tooth, that is, it first passes through the inlet orifice plate to release part of the pressure, and then the working fluid enters the first-stage, second-stage, and third-stage valve cages 3 to reduce the pressure multiple times, and finally reduces the pressure to the required value. This can reduce the pressure of the working fluid passing through the protection valve to the required pressure, so that the valve is protected from cavitation damage.

[0031] The inlet throttling orifice plate 1, device housing 2, valve cage 3, outlet throttling orifice plate 5, positioning sleeve A6, flange 7, and positioning sleeve B8 have all undergone special heat treatment, such as vacuum tempering, to enhance material properties.

[0032] The outer diameter of flange 7 is the same as the inner diameter of the device housing 2, which facilitates positioning.

[0033] The edge of the open end of the valve cage 3 is turned outward to form a retaining ring, and the retaining ring is stuck in the corresponding groove on the flange 7.

[0034] The steam outlet 4 is a stepped hole, and the larger diameter half-hole in the stepped hole is located on the outer surface of the valve cage 3.

[0035] One end of each flange 7 is connected to one end of a positioning sleeve B8;

[0036] like Figure 1 In one embodiment shown, the flange 7 is connected to a positioning sleeve B8 at one end facing the outlet throttling orifice plate 5. The other end of the positioning sleeve B8 engages with a groove on the corresponding end face of the adjacent flange 7 or a groove on the end of the outlet throttling orifice plate 5. The inlet throttling orifice plate 1 is engaged with the adjacent flange 7 by a positioning sleeve A6. That is, the valve cage 3 is positioned and fixed inside the device housing 2 by the setting of positioning sleeve B8 and positioning sleeve A6, so that the components are locked together and it is also convenient to disassemble.

[0037] This utility model employs an advanced structure and special heat treatment. Through multiple pressure reductions, it can reduce the working fluid passing through the protected valve to the required pressure. It adopts a constant flow and constant pressure drop design, so the system flow will not be reduced after installation.

[0038] This technology eliminates the need for high-pressure valves to withstand large pressure differentials, preventing cavitation erosion of the valve core. High-pressure valves can then open and close as smoothly as low-pressure valves. As a result, our high-pressure valves will surpass those of similar foreign valves, significantly extend the lifespan of protected valves, reduce factory labor and material costs, and minimize losses and environmental pollution caused by leaks.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A novel valve protection device, comprising an inlet throttling orifice plate (1), a device housing (2), a valve cage (3), and an outlet throttling orifice plate (5), characterized in that, The two ends of the device housing (2) are respectively connected to the inlet throttling orifice plate (1) and the outlet throttling orifice plate (5) which are coaxial with it; a plurality of valve cages (3) are provided between the inlet throttling orifice plate (1) and the outlet throttling orifice plate (5), and a plurality of steam outlet holes (4) are opened on the surface of the valve cages (3).

2. The novel valve protection device according to claim 1, characterized in that, The device housing (2) is fitted with the valve and the valve connection.

3. The novel valve protection device according to claim 1, characterized in that, A throttling orifice A (11) is opened in the middle of the inlet throttling orifice plate (1), and the diameter of the input end of the throttling orifice A (11) is larger than the diameter of the output end.

4. The novel valve protection device according to claim 1 or 3, characterized in that, A throttling orifice B (51) is opened in the middle of the outlet throttling orifice plate (5), and the diameter of the input end of the throttling orifice B (51) is smaller than the diameter of the output end.

5. The novel valve protection device according to claim 4, characterized in that, The steam outlet (4) is a stepped hole, and the larger diameter half-hole in the stepped hole is located on the outer surface of the valve cage (3).

6. The novel valve protection device according to claim 5, characterized in that, The main body of the valve cage (3) is a cylindrical structure with one end open and the other end closed. The opening end of the valve cage (3) is fixedly connected to the center hole of the flange (7).

7. The novel valve protection device according to claim 6, characterized in that, One end of each flange (7) is connected to one end of a positioning sleeve B (8); the end of the flange (7) facing the outlet throttling orifice plate (5) is connected to the positioning sleeve B (8), and the other end of the positioning sleeve B (8) is engaged with the groove opened on the corresponding end face of the adjacent flange (7) or the groove opened at the end of the outlet throttling orifice plate (5). The inlet throttling orifice plate (1) is engaged with the adjacent flange (7) through the positioning sleeve A (6). The valve cage (3) is positioned and fixed inside the device housing (2) by the setting of the positioning sleeve B (8) and the positioning sleeve A (6).

8. The novel valve protection device according to claim 7, characterized in that, The inlet throttling orifice plate (1), device housing (2), valve cage (3), outlet throttling orifice plate (5), positioning sleeve A (6), flange (7) and positioning sleeve B (8) have all undergone heat treatment.

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