High-pressure steam adjusting valve

Abstract

The invention discloses a high-pressure steam adjusting valve, and relates to the technical field of valves. The high-pressure steam adjusting valve comprises a valve shell, a spring box is arranged at the top of the valve shell, a connecting rod is arranged on the outer side of the spring box, a spring seat is arranged on the outer surface of the connecting rod, a connecting shaft is arranged in the spring box, a first spring is arranged on the outer surface of the connecting shaft, a valve rod is fixedly connected to the bottom end of the connecting shaft, and a valve sleeve assembly is arranged in the valve shell. A cleaning device is fixedly connected to the bottom of the valve sleeve assembly, a valve disc is fixedly connected to the bottom end of the valve rod, a collecting device is fixedly connected to the upper surface of the valve disc, a sealing sleeve is arranged on the outer surface of the valve rod, the sealing sleeve is arranged on the top of the valve sleeve assembly, an oxide layer on the surface of the valve rod can be treated, and the connecting strength of the valve rod and the valve sleeve can also be enhanced. And the rigidity of the valve rod can be improved, so that the condition of overload fracture of the valve rod is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a high-pressure steam regulating valve. Background Art

[0002] Steam is an indispensable and important working medium in coal-fired boiler power plants and plays a vital role in the process of energy conversion and transmission. As an important means of steam control and regulation, the performance and reliability of steam valves are directly related to the safe operation and efficiency indicators of the entire power plant steam system. The material selection, sealing performance and high temperature resistance of steam valves are also the key to ensure their long-term stable operation. By selecting suitable materials and sealing structures, the service life of the valve can be extended and maintenance costs can be reduced. It is also one of the important measures to ensure the safe and efficient operation of the steam system.

[0003] The existing high-pressure steam regulating valve is in a high-temperature, high-pressure, and high-speed operating environment. After working for a long time, an oxide layer is easily formed on the surface of the valve stem, causing scaling and subsequent sticking of the valve stem, which may make the valve unable to close, thereby affecting the normal operation of the turbine. In addition, due to stress concentration, the valve stem may be overloaded and broken, which may also cause related equipment to fail to operate. Summary of the invention

[0004] In view of the deficiencies of the existing problems, the present invention provides a high-pressure steam regulating valve to solve the existing problems raised in the above background technology.

[0005] To solve the above problems, the present invention is implemented through the following technical solutions: a high-pressure steam regulating valve, comprising a valve housing, a spring box is arranged on the top of the valve housing, a connecting rod is arranged on the outside of the spring box, a spring seat is arranged on the outer surface of the connecting rod, a connecting shaft is arranged inside the spring box, a first spring is arranged on the outer surface of the connecting shaft, a valve stem is fixedly connected to the bottom end of the connecting shaft, a valve sleeve assembly is arranged inside the valve housing, a cleaning device is fixedly connected to the bottom of the valve sleeve assembly, a valve disc is fixedly connected to the bottom end of the valve stem, a collecting device is fixedly connected to the upper surface of the valve disc, a sealing sleeve is arranged on the outer surface of the valve stem, and the sealing sleeve is arranged on the top of the valve sleeve assembly, the valve sleeve assembly comprises a valve sleeve body, an inner cavity is arranged inside the valve sleeve body, a reinforcing rod is fixedly connected to the inner surface of the inner cavity, and the outer surface of the reinforcing rod The face cover is provided with a movable plate and a second spring, the outer surface of the movable plate is fixedly connected with a movable rod, the end of the movable rod is fixedly connected with a guide clamping plate, the valve stem comprises an Inconel alloy layer and a stainless steel base layer, the outer surface of the stainless steel base layer is provided with a clamping portion, the cleaning device comprises a connecting seat, the top of the inner surface of the connecting seat is fixedly connected with a first scraper, the upper surface of the first scraper is fixedly connected with a second scraper, the inner surface of the connecting seat is fixedly connected with a support column, the interior of the support column is provided with a support rod, the collecting device comprises a fixed seat, the interior of the fixed seat is provided with a dust collecting ring sleeve, the top of the fixed seat is provided with a first clamping groove, the bottom of the inner surface of the fixed seat is provided with a second clamping groove, the inner wall of the fixed seat is provided with a third clamping groove, the outer surface of the dust collecting ring sleeve is fixedly connected with a first clamping block, a second clamping block and a third clamping block.

[0006] Preferably, the outer surface of the movable rod is sleeved inside the valve sleeve body, the outer surface of the movable rod passes through the valve sleeve body and extends to the inner cavity, and the guide clamping plate is arranged at one end of the movable rod away from the movable plate.

[0007] Preferably, the end of the second spring is fixedly connected to the outer surface of the movable plate, the end of the second spring away from the movable plate is fixedly connected to the inner surface of the inner cavity, and the movable rod is arranged at the interval of the reinforcing rod.

[0008] Preferably, the guide clamping plate is arranged around the valve stem, and the outer surface of the guide clamping plate is in contact with the outer surface of the valve stem.

[0009] Preferably, the stainless steel base layer is arranged in the inner cavity of the Inconel alloy layer, and the outer surface of the engaging portion is extrusion-fitted with the groove on the inner surface of the Inconel alloy layer.

[0010] Preferably, the upper surface of the connecting seat is fixedly connected to the bottom of the valve sleeve body, the lower surface of the second scraper is fixedly connected to an elastic support plate, and the side of the elastic support plate away from the second scraper is fixedly connected to the upper surface of the first scraper.

[0011] Preferably, a flexible compensation cavity is provided inside the support column, the end of the outer surface of the support rod is adapted to the inner surface of the flexible compensation cavity, the outer surface of the support rod is sleeved inside the support column, and the end of the support rod away from the flexible compensation cavity is fixedly connected to the lower surface of the first scraper.

[0012] Preferably, the bottom of the fixing seat is fixedly connected to the upper surface of the valve disc, the first clamping block is arranged at the side of the lower surface of the dust collecting ring sleeve, and the second clamping block is arranged at the bottom of the dust collecting ring sleeve.

[0013] Preferably, the outer surface of the first card block is matched with the inner surface of the first card slot, the outer surface of the second card block is matched with the inner surface of the second card slot, and the outer surface of the third card block is matched with the inner surface of the third card slot.

[0014] The present invention provides a high-pressure steam regulating valve. It has the following beneficial effects:

[0015] 1. The high-pressure steam regulating valve can process the oxide layer on the surface of the valve stem by setting a cleaning device, reduce the oxide layer accumulated on the surface of the valve stem, and prevent the valve stem from scaling and sticking, so as to ensure the normal operation of the turbine.

[0016] Second, the high-pressure steam regulating valve is provided with a collecting device, which cooperates with the cleaning device so that the oxide layer cleaned by the cleaning device is collected together for convenient centralized processing, so as to prevent foreign matter from falling into the interior of the valve and affecting the normal operation of the valve.

[0017] 3. The high-pressure steam regulating valve can strengthen the connection strength between the valve stem and the valve sleeve by arranging a guide clamp, a movable rod, and a second spring in the valve sleeve body, and play a role in dispersing impact force when the valve stem is subjected to stress, thereby improving the stability of the valve stem and also improving the durability of the valve stem.

[0018] Fourth, the high-pressure steam regulating valve has a double-layer structure of an Inconel alloy layer and a stainless steel base layer, so that the entire valve stem is more rigid and less prone to damage, and the rigidity of the valve stem itself is improved, thereby preventing the valve stem from overload and breakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2It is a schematic cross-sectional structure diagram of a part of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the valve sleeve of the present invention;

[0022] Figure 4 It is a schematic diagram of the top view of the valve stem of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the cleaning device of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the collecting device of the present invention.

[0025] In the figure: 1, valve housing; 2, spring box; 3, connecting rod; 4, spring seat; 5, connecting shaft; 6, first spring; 7, valve sleeve assembly; 71, valve sleeve body; 72, inner cavity; 73, movable plate; 74, movable rod; 75, guide clamping plate; 76, reinforcing rod; 77, second spring; 8, valve stem; 81, Inconel alloy layer; 82, stainless steel base layer; 83, clamping part; 9, valve disc; 10, cleaning device; 10 1. Connecting seat; 102. First scraper; 103. Second scraper; 104. Support column; 105. Flexible compensation chamber; 106. Support rod; 107. Elastic support plate; 11. Collecting device; 111. Fixed seat; 112. Dust collecting ring sleeve; 113. First card slot; 114. Second card slot; 115. Third card slot; 116. First card block; 117. Second card block; 118. Third card block; 12. Sealing sleeve. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0027] Example 1

[0028] like Figure 1-Figure 6As shown, the present invention provides a technical solution: a high-pressure steam regulating valve, comprising a valve housing 1, a spring box 2 is arranged on the top of the valve housing 1, a connecting rod 3 is arranged on the outside of the spring box 2, a spring seat 4 is arranged on the outer surface of the connecting rod 3, a connecting shaft 5 is arranged inside the spring box 2, a first spring 6 is arranged on the outer surface of the connecting shaft 5, a valve stem 8 is fixedly connected to the bottom end of the connecting shaft 5, a valve sleeve assembly 7 is arranged inside the valve housing 1, a cleaning device 10 is fixedly connected to the bottom of the valve sleeve assembly 7, a valve disc 9 is fixedly connected to the bottom end of the valve stem 8, a collecting device 11 is fixedly connected to the upper surface of the valve disc 9, a sealing sleeve 12 is arranged on the outer surface of the valve stem 8, and the sealing sleeve 12 is arranged on the top of the valve sleeve assembly 7, the valve sleeve assembly 7 comprises a valve sleeve body 71, an inner cavity 72 is arranged inside the valve sleeve body 71, a reinforcing rod 76 is fixedly connected to the inner surface of the inner cavity 72, a movable plate 73 and a second spring 77 are sleeved on the outer surface of the reinforcing rod 76, and the outer surface of the movable plate 73 is fixedly connected to There is a movable rod 74, the end of the movable rod 74 is fixedly connected to a guide clamping plate 75, the valve stem 8 includes an Inconel alloy layer 81 and a stainless steel base layer 82, the outer surface of the stainless steel base layer 82 is provided with a clamping portion 83, the cleaning device 10 includes a connecting seat 101, the top of the inner surface of the connecting seat 101 is fixedly connected to a first scraper 102, the upper surface of the first scraper 102 is fixedly connected to a second scraper 103, and the inner surface of the connecting seat 101 is fixedly connected to a support column 104 A support rod 106 is arranged inside the support column 104, the collecting device 11 includes a fixed seat 111, a dust collecting ring sleeve 112 is arranged inside the fixed seat 111, a first card groove 113 is arranged on the top of the fixed seat 111, a second card groove 114 is arranged on the bottom of the inner surface of the fixed seat 111, a third card groove 115 is arranged on the inner wall of the fixed seat 111, and a first card block 116, a second card block 117 and a third card block 118 are fixedly connected to the outer surface of the dust collecting ring sleeve 112.

[0029] The outer surface of the movable rod 74 is sleeved inside the valve sleeve body 71 , and the outer surface of the movable rod 74 passes through the valve sleeve body 71 and extends to the inner cavity. The guide clamping plate 75 is arranged at one end of the movable rod 74 away from the movable plate 73 .

[0030] The end of the second spring 77 is fixedly connected to the outer surface of the movable plate 73 , and one end of the second spring 77 away from the movable plate 73 is fixedly connected to the inner surface of the inner cavity 72 . The movable rod 74 is arranged at the interval of the reinforcing rod 76 .

[0031] The guide clamping plate 75 is arranged around the valve stem 8 , and the outer surface of the guide clamping plate 75 contacts the outer surface of the valve stem 8 .

[0032] The stainless steel base layer 82 is disposed in the inner cavity of the Inconel alloy layer 81 , and the outer surface of the engaging portion 83 is pressed and fitted with the groove on the inner surface of the Inconel alloy layer 81 .

[0033] The upper surface of the connecting seat 101 is fixedly connected to the bottom of the valve sleeve body 71 , the lower surface of the second scraper 103 is fixedly connected to an elastic support plate 107 , and the side of the elastic support plate 107 away from the second scraper 103 is fixedly connected to the upper surface of the first scraper 102 .

[0034] A flexible compensation cavity 105 is provided inside the support column 104, the end of the outer surface of the support rod 106 is adapted to the inner surface of the flexible compensation cavity 105, the outer surface of the support rod 106 is sleeved inside the support column 104, and one end of the support rod 106 away from the flexible compensation cavity 105 is fixedly connected to the lower surface of the first scraper 102.

[0035] The bottom of the fixing seat 111 is fixedly connected to the upper surface of the valve disc 9 , the first clamping block 116 is arranged at the side of the lower surface of the dust collecting ring sleeve 112 , and the second clamping block 117 is arranged at the bottom of the dust collecting ring sleeve 112 .

[0036] The outer surface of the first clamping block 116 matches the inner surface of the first clamping slot 113 , the outer surface of the second clamping block 117 matches the inner surface of the second clamping slot 114 , and the outer surface of the third clamping block 118 matches the inner surface of the third clamping slot 115 .

[0037] When in use, through the valve sleeve assembly 7, when the high-pressure regulating valve works, the valve stem 8 moves up and down between the multiple guide clamps 75, and the second spring 77 is always in a compressed state. The elastic force of the second spring 77 makes the guide clamp 75 always clamped on the outer surface of the valve stem 8, which facilitates the movement of the valve stem 8 relative to the valve sleeve assembly 7. At the same time, the elastic force of the second spring 77 also increases the supporting force of the guide clamp 75 on the valve stem 8. In the process of the valve stem 8 moving up and down, the stress on the valve stem 8 is transmitted to the second spring 77 through the movable rod 74 and the movable plate 73. The second spring 77 uses its own elasticity to convert most of the stress into elastic potential energy, so that the valve stem 8 is buffered. The multiple guide clamps 75 work together to disperse and weaken the stress acting on the valve stem 8, thereby improving the stability of the valve stem.

[0038] Through the valve stem 8, the valve stem 8 is composed of an Inconel alloy layer 81 with high strength and better corrosion resistance and a stainless steel base layer 82. The internal stainless steel base layer 82 provides support for the outer Inconel alloy layer 81. At the same time, the clamping part 83 on the stainless steel base layer 82 increases the contact area between the Inconel alloy layer 81 and the stainless steel base layer 82, thereby improving the connection stability between the Inconel alloy layer 81 and the stainless steel base layer 82, making the entire valve stem 8 more rigid and less prone to damage.

[0039] When the valve stem 8 moves upward along the valve sleeve assembly 7 through the cleaning device 10, the distance between the front end of the first scraper 102 and the valve stem 8 is greater than the distance between the second scraper 103 and the valve stem 8. The first scraper 102 first scrapes off the outer layer of the oxide layer on the surface of the valve stem 8, and then the second scraper 102 scrapes off the remaining oxide layer on the surface of the valve stem 8, so that the oxide layer formed on the surface of the valve stem 8 is cleaned after two treatments. The interior of the flexible compensation cavity 105 is filled with high-temperature resistant oil, and the high-temperature resistant oil provides support for the support rod 106, so that the first scraper 102 is supported by the high-temperature resistant oil and the support rod 106. When the first scraper 102 scrapes off the oxide layer, slight vibration will be generated. Since the high-temperature resistant oil is a liquid with a relatively high density, it can absorb the slight vibration, thereby improving the durability of the first scraper 102. The slight vibration generated when the first scraper 102 scrapes off the oxide layer is weakened and absorbed by the elastic support plate 107, thereby improving the durability of the second scraper 102.

[0040] The oxide layer scraped off by the cleaning device 10 through the collecting device 11 falls into the dust collecting ring sleeve 112, which is convenient for centralized processing. The dust collecting ring sleeve 112 is fixed on the fixing seat 111 by the first clamping block 116, the second clamping block 117 and the third clamping block 118. The dust collecting ring sleeve 112 is firmly installed in the fixing seat 111 by clamping the first clamping block 116 into the first clamping groove 113, the second clamping block 117 into the second clamping groove 114, and the third clamping block 118 into the third clamping groove 115. When it is necessary to process the oxide layer collected in the dust collecting ring sleeve 112, the dust collecting ring sleeve 112 can be directly pulled out from the fixing seat 111 because the dust collecting ring sleeve 112 is elastic.

[0041] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A high-pressure steam regulating valve, comprising a valve housing (1), characterized in that: A spring box (2) is arranged on the top of the valve housing (1), a connecting rod (3) is arranged on the outside of the spring box (2), a spring seat (4) is arranged on the outer surface of the connecting rod (3), a connecting shaft (5) is arranged inside the spring box (2), a first spring (6) is arranged on the outer surface of the connecting shaft (5), a valve stem (8) is fixedly connected to the bottom end of the connecting shaft (5), a valve sleeve assembly (7) is arranged inside the valve housing (1), a cleaning device (10) is fixedly connected to the bottom of the valve sleeve assembly (7), a valve disc (9) is fixedly connected to the bottom end of the valve stem (8), and the valve The upper surface of the disc (9) is fixedly connected to a collecting device (11); the outer surface of the valve stem (8) is provided with a sealing sleeve (12); the sealing sleeve (12) is arranged on the top of the valve sleeve assembly (7); the valve sleeve assembly (7) comprises a valve sleeve body (71); an inner cavity (72) is arranged inside the valve sleeve body (71); a reinforcing rod (76) is fixedly connected to the inner surface of the inner cavity (72); a movable plate (73) and a second spring (77) are sleeved on the outer surface of the reinforcing rod (76); a movable rod (74) is fixedly connected to the outer surface of the movable plate (73); The end of the movable rod (74) is fixedly connected to a guide clamping plate (75), the valve stem (8) includes an Inconel alloy layer (81) and a stainless steel base layer (82), the outer surface of the stainless steel base layer (82) is provided with a snap-fit ​​portion (83), the cleaning device (10) includes a connecting seat (101), the top of the inner surface of the connecting seat (101) is fixedly connected to a first scraper (102), the upper surface of the first scraper (102) is fixedly connected to a second scraper (103), the inner surface of the connecting seat (101) is fixedly connected to a support column (104), the support column A support rod (106) is arranged inside the (104), the collecting device (11) comprises a fixed seat (111), a dust collecting ring sleeve (112) is arranged inside the fixed seat (111), a first card slot (113) is arranged on the top of the fixed seat (111), a second card slot (114) is arranged on the bottom of the inner surface of the fixed seat (111), a third card slot (115) is arranged on the inner wall of the fixed seat (111), and a first card block (116), a second card block (117) and a third card block (118) are fixedly connected to the outer surface of the dust collecting ring sleeve (112).

2. A high-pressure steam regulating valve according to claim 1, characterized in that: The outer surface of the movable rod (74) is sleeved inside the valve sleeve body (71), and the outer surface of the movable rod (74) passes through the valve sleeve body (71) and extends to the inner cavity. The guide clamping plate (75) is arranged at one end of the movable rod (74) away from the movable plate (73).

3. A high-pressure steam regulating valve according to claim 1, characterized in that: The end of the second spring (77) is fixedly connected to the outer surface of the movable plate (73), the end of the second spring (77) away from the movable plate (73) is fixedly connected to the inner surface of the inner cavity (72), and the movable rod (74) is arranged at the interval of the reinforcing rod (76).

4. A high-pressure steam regulating valve according to claim 1, characterized in that: The guide clamping plate (75) is arranged around the valve stem (8), and the outer surface of the guide clamping plate (75) is in contact with the outer surface of the valve stem (8).

5. The high-pressure steam regulating valve according to claim 1, characterized in that: The stainless steel base layer (82) is arranged in the inner cavity of the Inconel alloy layer (81), and the outer surface of the engaging portion (83) is extruded and fitted with the groove on the inner surface of the Inconel alloy layer (81).

6. The high-pressure steam regulating valve according to claim 1, characterized in that: The upper surface of the connecting seat (101) is fixedly connected to the bottom of the valve sleeve body (71), and the lower surface of the second scraper (103) is fixedly connected to an elastic support plate (107), and the side of the elastic support plate (107) away from the second scraper (103) is fixedly connected to the upper surface of the first scraper (102).

7. The high-pressure steam regulating valve according to claim 1, characterized in that: A flexible compensation cavity (105) is provided inside the support column (104), the end of the outer surface of the support rod (106) is adapted to the inner surface of the flexible compensation cavity (105), the outer surface of the support rod (106) is sleeved inside the support column (104), and one end of the support rod (106) away from the flexible compensation cavity (105) is fixedly connected to the lower surface of the first scraper (102).

8. The high-pressure steam regulating valve according to claim 1, characterized in that: The bottom of the fixing seat (111) is fixedly connected to the upper surface of the valve disc (9), the first clamping block (116) is arranged on the side of the lower surface of the dust collecting ring sleeve (112), and the second clamping block (117) is arranged at the bottom of the dust collecting ring sleeve (112). The high-pressure steam regulating valve according to claim 1 is characterized in that: The outer surface of the first clamping block (116) is matched with the inner surface of the first clamping slot (113), the outer surface of the second clamping block (117) is matched with the inner surface of the second clamping slot (114), and the outer surface of the third clamping block (118) is matched with the inner surface of the third clamping slot (115).

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