High-pressure steam adjusting valve

Abstract

The utility model 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 utility model relates to valve technical field, concretely is a kind of high-pressure steam regulating air door. BACKGROUND

[0002] Steam, as the important working medium indispensable in coal-fired boiler power plant, plays a vital role in energy conversion and transmission process. As an important means of steam control and regulation, the performance and reliability of steam valve are directly related to the safe operation and efficiency index of the whole power plant steam system. The material selection, sealing performance and high temperature resistance of steam valve are also the key to ensure its long-term stable operation. By selecting suitable material and sealing structure, the service life of valve is prolonged, and the maintenance cost is reduced. It is also one of the important measures to ensure the safe and efficient operation of steam system.

[0003] The existing high-pressure steam regulating air door is in a high-temperature, high-pressure and high-speed operating environment. After a long time of work, the surface of the valve stem is prone to form an oxidation layer, causing the valve stem to scale and jam. This may cause the valve to fail to close, affecting the normal operation of the steam turbine. In addition, due to stress concentration, the valve stem may be overloaded and broken, also causing the related equipment to fail to operate. SUMMARY

[0004] To solve the above problems in the background art, the utility model provides a high-pressure steam regulating air door.

[0005] The utility model discloses a high pressure steam regulating valve, including the valve housing, the top of valve housing is provided with spring box, the outside of spring box is provided with connecting rod, the outer surface of connecting rod is provided with spring seat, the inside of spring box is provided with connecting shaft, the outer surface of connecting shaft is provided with first spring, the bottom fixedly connected with valve stem of connecting shaft, the inside of valve housing is provided with valve sleeve subassembly, the bottom fixedly connected with cleaning device of valve sleeve subassembly, the bottom fixedly connected with valve disc of valve stem, the upper surface fixedly connected with collecting device of valve disc, the outer surface of valve stem is provided with sealing sleeve, sealing sleeve sets up at the top of valve sleeve subassembly, valve sleeve subassembly includes valve sleeve body, the inside of valve sleeve body is provided with inside cavity, the inner fixed surface of inside cavity is fixedly connected with reinforcing rod, the outer surface of reinforcing rod is provided with movable plate and second spring, the outer surface of movable plate is fixedly connected with movable rod, the end fixedly connected with guide clamping plate of movable rod, valve stem includes incoherent alloy layer and stainless steel base layer, the outer surface of stainless steel base layer is provided with the clamping part, and the cleaning device includes connecting seat, the top of connecting seat inner surface is fixedly connected with first scraper, the upper surface fixedly connected with second scraper of first scraper, the inner surface fixedly connected with support column of connecting seat, the inside of support column is provided with support rod, the inside of fixed seat is provided with dust collecting ring, the top of fixed seat is provided with first clamping groove, the bottom of fixed seat inner surface is provided with second clamping groove, the inner wall of fixed seat is provided with third clamping groove, the outer surface fixedly connected with first clamping block, second clamping block and third clamping block of dust collecting ring.

[0006] Preferably, the outer surface of the movable rod is sleeved in the inside of the valve sleeve body, the outer surface of the movable rod penetrates 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, one end of the second spring away from the movable plate is fixedly connected to the inner surface of the inside cavity, and the movable rod is arranged at intervals of the reinforcing rod.

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

[0009] Preferably, the stainless steel base layer is arranged in the inner cavity of the incoherent alloy layer, and the outer surface of the clamping part is extruded and matched with the groove of the inner surface of the incoherent 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 with an elastic supporting plate, and the side of the elastic supporting plate away from the second scraper is fixedly connected to the upper surface of the first scraper.

[0011] Preferably, the inside of the supporting column is provided with a flexible compensation cavity, the end of the outer surface of the supporting rod is matched with the inner surface of the flexible compensation cavity, the outer surface of the supporting rod is sleeved in the inside of the supporting column, and the end of the supporting 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, and the second clamping block is arranged at the bottom of the dust collecting ring.

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

[0014] The utility model provides a kind of high-pressure steam regulating valve.It has the following beneficial effects:

[0015] I, the high-pressure steam regulating valve, by setting cleaning device, the oxidation layer on the surface of valve rod can be handled, reduce the oxidation layer accumulated on the surface of valve rod, prevent the surface of valve rod from scaling and appear jamming situation, to guarantee the normal operation of steam turbine.

[0016] II, the high-pressure steam regulating valve, by setting collecting device, collecting device cooperates with cleaning device, so that the oxidation layer cleaned by cleaning device is collected together, convenient centralized processing, to prevent foreign matter from falling into the inside of valve and affecting the normal operation of valve.

[0017] III, the high-pressure steam regulating valve, by setting guide clamping plate, movable rod, movable rod and second spring in valve sleeve body, the connection strength of valve rod and valve sleeve can be strengthened, play the role of dispersing impact force when valve rod is stressed, to improve the stability of valve rod, also can improve the durability of valve rod.

[0018] IV, the high-pressure steam regulating valve, by setting valve rod into double-layer mechanism of inconel alloy layer and stainless steel base layer, the rigidity of entire valve rod is stronger, not easy to damage, improve the rigidity of valve rod itself, to prevent the overload fracture of valve rod. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the overall structure schematic view of the utility model;

[0020] Figure 2It is the partial sectional view structural schematic drawing of the utility model;

[0021] Figure 3 It is the structure schematic drawing of the utility model valve sleeve;

[0022] Figure 4 It is the overhead structure schematic drawing of the utility model valve rod;

[0023] Figure 5 It is the structure schematic drawing of the utility model cleaning device;

[0024] Figure 6 It is the structure schematic drawing of the utility model collecting device.

[0025] In the drawing: 1, valve shell;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 rod;81, inconel alloy layer;82, stainless steel base layer;83, clamping part;9, valve disc;10, cleaning device;101, connecting seat;102, first scraper;103, second scraper;104, support column;105, flexible compensation cavity;106, support rod;107, elastic support plate;11, collecting device;111, fixed seat;112, dust collecting ring;113, first clamping groove;114, second clamping groove;115, third clamping groove;116, first clamping block;117, second clamping block;118, third clamping block;12, sealing sleeve. DETAILED DESCRIPTION

[0026] The utility model will be explained further in detail in combination with the drawings and specific embodiment. The embodiment of the utility model is given for example and description, and is not exhaustive or limit the utility model to the disclosed form. Many modifications and changes are obvious to those skilled in the art. The embodiment is selected and described to better illustrate the principle and practical application of the utility model, and make those skilled in the art understand the utility model to design various embodiments with various modifications suitable for specific use.

[0027] Embodiment 1

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

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

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

[0031] Guide clamping plate 75 is arranged around valve rod 8, and the outer surface of guide clamping plate 75 is in contact with the outer surface of valve rod 8.

[0032] Stainless steel base layer 82 is arranged in the inner cavity of inconnel alloy layer 81, and the outer surface of clamping portion 83 is extruded and matched with the groove of the inner surface of inconnel alloy layer 81.

[0033] 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 with the elastic supporting plate 107, and the side of the elastic supporting plate 107 away from the second scraper 103 is fixedly connected to the upper surface of the first scraper 102.

[0034] The inside of the supporting column 104 is provided with the flexible compensation cavity 105, the end of the outer surface of the supporting rod 106 is matched with the inner surface of the flexible compensation cavity 105, the outer surface of the supporting rod 106 is sleeved in the inside of the supporting column 104, and the end of the supporting 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 fixed 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 is matched with the inner surface of the first clamping groove 113, the outer surface of the second clamping block 117 is matched with the inner surface of the second clamping groove 114, and the outer surface of the third clamping block 118 is matched with the inner surface of the third clamping groove 115.

[0037] In use, when the high-pressure adjusting valve works, the valve rod 8 moves up and down between the plurality of guide clamping plates 75 through the valve sleeve assembly 7, and the second spring 77 is always in a compressed state, the elastic force of the second spring 77 makes the guide clamping plates 75 always clamped on the outer surface of the valve rod 8, so that the valve rod 8 is convenient to move relative to the valve sleeve assembly 7, and the elastic force of the second spring 77 also increases the support force of the guide clamping plates 75 on the valve rod 8, in the process that the valve rod 8 moves up and down, the stress borne by the valve rod 8 is transmitted to the second spring 77 through the movable rod 74 and the movable plate 73, and the second spring 77 converts most of the stress into elastic potential energy by using the elasticity thereof, so that the valve rod 8 is buffered, and the plurality of guide clamping plates 75 cooperate together, so that the stress acting on the valve rod 8 is dispersed and weakened, so as to improve the stability of the valve rod.

[0038] The valve rod 8 is composed of the inconel alloy layer 81 and the stainless steel base layer 82 which are better in high strength and corrosion resistance, the inner stainless steel base layer 82 provides support for the outer inconel alloy layer 81, the clamping part 83 on the stainless steel base layer 82 increases the contact area of the inconel alloy layer 81 and the stainless steel base layer 82, improves the connection stability of the inconel alloy layer 81 and the stainless steel base layer 82, and makes the whole valve rod 8 stronger in rigidity and less likely to be damaged.

[0039] When the valve rod 8 is moved 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 rod 8 is greater than the distance between the second scraper 103 and the valve rod 8, so that the first scraper 102 scrapes off the outer layer of the oxidation layer on the surface of the valve rod 8 first, and then the second scraper 102 scrapes off the remaining oxidation layer on the surface of the valve rod 8, so that the oxidation layer on the surface of the valve rod 8 is cleaned after two treatments. The flexible compensation cavity 105 is filled with high-temperature-resistant oil, which supports 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 oxidation layer, it will vibrate slightly. Since the high-temperature-resistant oil is a liquid with high density, it can absorb the slight vibration to improve the durability of the first scraper 102. The slight vibration generated when the first scraper 102 scrapes off the oxidation layer is weakened and absorbed by the elastic support plate 107, thereby improving the durability of the second scraper 102.

[0040] Through the collecting device 11, the oxidation layer scraped off by the cleaning device 10 falls into the dust collecting ring 112, which is convenient for centralized treatment. The dust collecting ring 112 is fixed on the fixed seat 111 through the first clamping block 116, the second clamping block 117 and the third clamping block 118. 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, the dust collecting ring 112 is stably installed in the fixed seat 111. When it is necessary to process the oxidation layer collected in the dust collecting ring 112, since the dust collecting ring 112 is elastic, the dust collecting ring 112 can be directly pulled out of the fixed seat 111.

[0041] Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art and related fields without creative labor should belong to the scope of protection of the present application. The structures, devices and operation methods not specifically described and explained in the present application, such as without special description and limitation, are implemented according to the conventional means in the art.

Claims

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

2. A high-pressure steam regulating valve according to claim 1, characterized in that: The outer surface of the movable rod (74) is sleeved in the inside of the valve sleeve body (71), the outer surface of the movable rod (74) penetrates through the valve sleeve body (71) and extends to the inner cavity, and the guide clamp plate (75) is arranged at the 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), 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), 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 rod (8), and the outer surface of the guide clamping plate (75) is in contact with the outer surface of the valve rod (8).

5. A 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 layer (81), and the outer surface of the clamping part (83) is extrudedly matched with the groove of the inner surface of the inconel layer (81).

6. A 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), the lower surface of the second scraper (103) is fixedly connected with the elastic supporting plate (107), and the side, away from the second scraper (103), of the elastic supporting plate (107) is fixedly connected to the upper surface of the first scraper (102).

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

8. A 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 at the side of the lower surface of the dust collecting ring (112), and the second clamping block (117) is arranged at the bottom of the dust collecting ring (112).

9. A high-pressure steam regulating valve according to claim 1, characterized in that: The outer surface of the first clamping block (116) is matched with the inner surface of the first clamping groove (113), the outer surface of the second clamping block (117) is matched with the inner surface of the second clamping groove (114), and the outer surface of the third clamping block (118) is matched with the inner surface of the third clamping groove (115).

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