Ultrahigh-temperature baffle butterfly valve
Through the design of a three -layer insulation layer and water -cooled structure in the butterfly valve, the problem of easy stuck or leakage of the butterfly valve under high temperature and high pressure conditions, and realized the normal work and durability of the butterfly valve under high temperature conditions.
Patent Information
- Application Number
- CN202423169975.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Existing butterfly valves are prone to stuck or leak problems under high temperature and high pressure conditions, and the manufacturing of high-temperature materials is difficult and costly, which limits its application range.
An ultra-high temperature baffle butterfly valve is designed, which uses three layers of insulation (fiber insulation layer, insulation coating layer and ceramic insulation layer) to form a thermal insulation lining to avoid sticking problems caused by excessive temperature, and is cooled by water Structure achieves temperature reduction and enhanced durability.
The butterfly valve work normally under the high temperature conditions of 900 ~ 1000 ° C, avoiding the problem of card death caused by high temperature, and improving the durability and sealing performance of the valve.
Smart Images
Figure CN222391974U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valves, in particular to an ultra-high temperature baffle butterfly valve. Background Art
[0002] The butterfly valve is equivalent to cutting off a section of pipe to make the valve body, with the middle disc plate throttling. It has small size, light weight, good approximate logarithmic flow characteristics, and good adjustment performance. Because its valve body also has the function of valve seat, it can make good use of the throttling to effectively flush the inner wall of the valve body, bringing better "self-cleaning" performance. It is most suitable for occasions with large diameter, large flow, low pressure, and unclean media as the process parameters are strengthened.
[0003] The disadvantage of butterfly valves is that they leak a lot and can only be used in low pressure situations, not in high temperature and high pressure situations. Usually the temperature range of butterfly valve products is within 400°C. At present, domestic butterfly valves will get stuck or leak when the temperature exceeds 400°C. High temperature butterfly valves usually involve two problems:
[0004] 1. The influence of thermal expansion and cold contraction, such as the gap of the guide and the rotation gap of the disc plate, will get stuck if you are not careful;
[0005] 2. The creep of high-temperature materials causes the mechanical properties of the materials to decrease, the sealing performance of the packing to decrease, and causes valve leakage, which involves the temperature resistance of the materials.
[0006] At present, the butterfly valve structure mainly used in China uses high-strength alloy for the valve body. This alloy can be directly used within 900-1000°C. For example, this material is used in the combustion chamber of the engine. They not only have good temperature resistance, but also have good strength performance. With this material, butterfly valves can be used for large diameters, and ball valves can be used for small and medium diameters. However, special alloy valves are difficult to manufacture and costly, and the valve body blank is not easy to cast, so there are great limitations. Summary of the invention
[0007] Purpose of the utility model: In order to overcome the defects of the prior art, the utility model provides an ultra-high temperature baffle butterfly valve, which selects three different insulation layers to form an insulation lining to avoid jamming due to excessive temperature and enhance durability.
[0008] The technical solution of the utility model: an ultra-high temperature baffle butterfly valve, comprising a valve body, a valve stem and a disc plate arranged in the valve body, the disc plate is connected to the valve stem, an insulating lining is arranged in the valve body, the insulating lining comprises a fiber insulating layer, an insulating coating layer and a ceramic insulating layer arranged in sequence from the outside to the inside, the fiber insulating layer is in contact with the inner wall of the valve body, a baffle is also arranged in the valve body, the baffle is located on both sides of the insulating lining to position the insulating lining, the valve stem comprises an upper rod body and a lower rod body, the upper and lower rod bodies are located at both ends of the disc plate, an upper connecting seat and a lower connecting seat are respectively provided at both ends of the valve body, the end of the upper rod body extends into the upper connecting seat, the end of the lower rod body extends into the lower connecting seat, a stuffing bin is provided in the connecting seat and located at the outer periphery of the valve stem, a stuffing bin is provided, and a water cooling structure is provided in the upper and lower rod bodies.
[0009] Specifically, the fiber insulation layer is provided with two layers, each layer is 20-22 mm thick, the insulation coating layer is 3-4 mm thick, and the ceramic insulation layer is 20-25 mm thick.
[0010] With the above settings, the valve can withstand temperatures of 900~1000℃. Three layers of thermal insulation are set. The innermost side in contact with the medium is made of high-temperature resistant metallurgical ceramics, the middle is made of liquid thermal insulation coating, and the outermost is a fiber insulation layer, which is made of fiber felt woven from aluminum silicate fibers. The thermal insulation layers can withstand temperatures above 1400℃. Through three layers of insulation, the valve body temperature can be lower than 60℃, avoiding jamming due to excessive temperature, enhancing durability, and reducing the temperature through water circulation.
[0011] The utility model is further configured as follows: a positioning boss is provided on the baffle, and the ends of the thermal insulation coating layer and the ceramic thermal insulation layer are pressed against the positioning boss.
[0012] By further configuring as described above, the thermal insulation coating layer and the ceramic thermal insulation layer can be positioned to stabilize their structure and provide a better thermal insulation effect.
[0013] The utility model is further configured as follows: the water cooling structure comprises a water inlet pipe and a water outlet pipe, the water outlet pipe is sleeved on the outer circumference of the water inlet pipe, and the water outlet of the water inlet pipe is communicated with the water inlet of the water outlet pipe.
[0014] With the above arrangement further adopted, the water inlet of the water inlet pipe and the water outlet of the water outlet pipe are arranged on the same side and are arranged at different heights. This can lengthen the water circulation path, better reduce the temperature of the valve stem packing part, and improve the valve stem strength.
[0015] The utility model is further configured as follows: a positioning sleeve is provided between the rod body and the corresponding connecting seat, a first purge assembly is provided on the upper connecting seat, and a second purge assembly is provided on the lower connecting seat. The first purge assembly and the second purge assembly have the same structure and both include a steam purge valve and a purge pipe. One end of the purge pipe is connected to the steam purge valve, and a positioning channel is provided on the connecting seat at one end of the packing close to the valve body, and the other end of the purge pipe is located in the positioning channel.
[0016] The above-mentioned further arrangement is adopted to prevent solid particles from gathering on the surface of the valve stem, causing the valve stem to be bitten and affecting the rotation of the valve stem. The operation is convenient. By extending the end of the purge pipe to the outside of the valve stem, the particles on the outside of the valve stem are blown away to avoid gathering.
[0017] The utility model is further configured as follows: the disc plate, the baffle plate and the valve stem are all made of high-temperature alloy steel.
[0018] With the above configuration further adopted, since the disc plate, baffle plate and valve stem are all in contact with high-temperature medium, high-temperature alloy steel is used, which can work normally at a high temperature of 1100°C and has high strength. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a cross-sectional view of a disc plate and a valve body of a specific embodiment of the utility model;
[0020] Figure 2 for Figure 1 A magnified view of part A;
[0021] Figure 3 It is a cross-sectional view of another direction of a specific embodiment of the utility model;
[0022] Figure 4 for Figure 3 A magnified view of part B;
[0023] Figure 5 for Figure 3 Magnified view of part C.
[0024] In the figure, 1. valve body; 2. valve stem; 21. upper rod body; 22. lower rod body; 3. disc plate; 4. thermal insulation lining; 41. fiber thermal insulation layer; 42. thermal insulation coating layer; 43. ceramic thermal insulation layer; 5. baffle; 51. positioning boss; 6. water cooling structure; 61. water inlet pipe; 62. water outlet pipe; 7. upper connecting seat; 71. first purge assembly; 8. lower connecting seat; 81. second purge assembly; 811. steam purge valve; 812. purge pipe; 9. positioning sleeve; 10. packing. DETAILED DESCRIPTION
[0025] The technical scheme in this embodiment will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] It should be noted that in the description of the present utility model, all directional indications (such as up, down, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0027] In addition, the descriptions of "first", "second", etc. in the present invention are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. In the description of the present invention, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically limited.
[0028] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that technical personnel in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0029] like Figure 1-5 As shown, an ultra-high temperature baffle butterfly valve includes a valve body 1, a valve stem 2 and a disc plate 3 arranged in the valve body 1, the disc plate 3 is connected to the valve stem 2, a thermal insulation lining 4 is arranged in the valve body 1, and the thermal insulation lining 4 includes a fiber thermal insulation layer 41, a thermal insulation coating layer 42 and a ceramic thermal insulation layer 43 arranged in sequence from the outside to the inside, the fiber thermal insulation layer 41 is in contact with the inner wall of the valve body 1, and a baffle 5 is also arranged in the valve body 1, and the baffle 5 is located on both sides of the thermal insulation lining 4 to position the thermal insulation lining 4.
[0030] Specifically, the fiber insulation layer 41 has two layers, each layer is 20-22 mm thick, the insulation coating layer 42 is 3-4 mm thick, the ceramic insulation layer 43 is 20-25 mm thick, the valve can withstand temperatures of 900-1000°C, and three insulation layers are provided. The innermost layer in contact with the medium is made of high-temperature resistant metallurgical ceramics, which can withstand 1500°C, are tensile and compressive, and resistant to high-temperature erosion, and are durable. The middle layer is made of liquid insulation coating, which can withstand temperatures of up to 2000°C. It is applied by spraying or brushing, and the thickness is less than 1 mm each time. The outermost layer is the fiber insulation layer 41, which is made of fiber felt woven from aluminum silicate fibers. The insulation layers can withstand temperatures above 1400°C. Through three layers of insulation, the temperature of the valve body 1 can be lower than 60°C, avoiding jamming due to excessive temperature and enhancing durability.
[0031] The baffle 5 is provided with a positioning boss 51, and the ends of the thermal insulation coating layer 42 and the ceramic insulation layer 43 are pressed against the positioning boss 51, which can position the thermal insulation coating layer 42 and the ceramic insulation layer 43 to make their structure stable and better achieve the thermal insulation effect.
[0032] The valve stem 2 includes an upper rod body 21 and a lower rod body 22, and the upper and lower rod bodies 22 are located at both ends of the disc plate 3. An upper connecting seat 7 and a lower connecting seat 8 are respectively provided at both ends of the valve body 1. The end of the upper rod body 21 extends into the upper connecting seat 7, and the end of the lower rod body 22 extends into the lower connecting seat 8. A stuffing bin is provided in the connecting seat at the outer periphery of the valve stem 2, and a stuffing bin is provided in the stuffing bin. A stuffing 10 is provided, and the stuffing is made of flexible graphite. A water cooling structure 6 is provided in both the upper and lower rod bodies 22. Specifically, the water cooling structure 6 includes an inlet pipe 61 and an outlet pipe 62. The outlet pipe 62 is sleeved on the outer periphery of the inlet pipe 61. The outlet of the inlet pipe 61 is communicated with the inlet of the outlet pipe 62. The temperature is reduced by water circulation. The inlet of the inlet pipe 61 and the outlet of the outlet pipe 62 are arranged on the same side and are staggered in height. In this way, the water circulation path can be lengthened, the temperature of the stuffing part of the valve stem 2 can be better reduced, and the strength of the valve stem 2 can be improved.
[0033] A positioning sleeve 9 is provided between the rod body and the corresponding connecting seat, a first purge assembly 71 is provided on the upper connecting seat 7, and a second purge assembly 81 is provided on the lower connecting seat 8. The first purge assembly 71 and the second purge assembly 81 have the same structure, both including a steam purge valve 811 and a purge pipe 812. One end of the purge pipe 812 is connected to the steam purge valve 811, and a positioning channel is provided on the connecting seat at one end of the packing 10 close to the valve body 1. The other end of the purge pipe 812 is located in the positioning channel to prevent solid particles from gathering on the surface of the valve stem 2, causing the valve stem 2 to be bitten and affecting the rotation of the valve stem 2. The structure is stable and the operation is convenient. By extending the end of the purge pipe 812 to the outside of the valve stem 2, the particles on the outside of the valve stem 2 are blown away to avoid aggregation.
[0034] The disc plate 3, baffle plate 5 and valve stem 2 are all made of high-temperature alloy steel, specifically GH3128, and the positioning sleeve is also made of high-temperature alloy steel. Because the disc plate 3, baffle plate 5 and valve stem 2 are all in contact with high-temperature medium, high-temperature alloy steel materials are used, which can work normally at a high temperature of 1100°C and have high strength.
Claims
1. An ultra-high temperature flapper butterfly valve, comprising a valve body (1), a valve stem (2) and a disc plate (3) arranged in the valve body (1), the disc plate (3) being connected to the valve stem (2), a heat insulating lining (4) being arranged in the valve body (1), and characterized in that: The thermal insulation lining (4) comprises a fiber thermal insulation layer (41), a thermal insulation coating layer (42) and a ceramic thermal insulation layer (43) which are arranged in sequence from the outside to the inside. The fiber thermal insulation layer (41) contacts the inner wall of the valve body (1). A baffle (5) is also provided in the valve body (1). The baffle (5) is located on both sides of the thermal insulation lining (4) to position the thermal insulation lining (4). The valve stem (2) comprises an upper stem body (21) and a lower stem body (22). The upper and lower stem bodies (22) are located at both ends of the disc plate (3). An upper connecting seat (7) and a lower connecting seat (8) are respectively provided at both ends of the valve body (1). The end of the upper stem body (21) extends into the upper connecting seat (7), and the end of the lower stem body (22) extends into the lower connecting seat (8). A stuffing bin is provided in the connecting seat at the outer periphery of the valve stem (2). A stuffing bin is provided with stuffing (10). A water cooling structure (6) is provided in both the upper and lower stem bodies (22).
2. The ultra-high temperature baffle butterfly valve according to claim 1, characterized in that: The fiber heat insulation layer (41) is provided with two layers, each layer having a thickness of 20 to 22 mm, the heat insulation coating layer (42) has a thickness of 3 to 4 mm, and the ceramic heat insulation layer (43) has a thickness of 20 to 25 mm.
3. The ultra-high temperature baffle butterfly valve according to claim 1 or 2, characterized in that: The baffle (5) is provided with a positioning boss (51), and the ends of the thermal insulation coating layer (42) and the ceramic thermal insulation layer (43) are pressed against the positioning boss (51).
4. The ultra-high temperature baffle butterfly valve according to claim 1 or 2, characterized in that: The water cooling structure (6) comprises a water inlet pipe (61) and a water outlet pipe (62), wherein the water outlet pipe (62) is sleeved on the outer circumference of the water inlet pipe (61), and the water outlet of the water inlet pipe (61) is in communication with the water inlet of the water outlet pipe (62).
5. The ultra-high temperature baffle butterfly valve according to claim 4, characterized in that: A positioning sleeve (9) is provided between the rod body and the corresponding connecting seat, a first purge assembly (71) is provided on the upper connecting seat (7), and a second purge assembly (81) is provided on the lower connecting seat (8), the first purge assembly (71) and the second purge assembly (81) having the same structure, both comprising a steam purge valve (811) and a purge pipe (812), one end of the purge pipe (812) being connected to the steam purge valve (811), a positioning channel being provided at one end of the connecting seat located near the packing (10) and the valve body (1), and the other end of the purge pipe (812) being located in the positioning channel.
6. The ultra-high temperature baffle butterfly valve according to claim 1 or 2, characterized in that: The disc plate (3), the baffle plate (5) and the valve stem (2) are all made of high-temperature alloy steel.