High-temperature-resistant circular single-blade air valve

Abstract

The utility model discloses a high-temperature-resistant round single-blade air valve, which relates to the technical field of ventilation valve equipment and comprises a valve body, an electric actuator, a blade, a valve shaft, graphite sealing packing, a lengthened valve shaft, a valve shaft fixing plate and a first heat insulation pad. Graphite is adopted as a filler material, gas leakage can be effectively reduced within the service life of the valve, and the sealing performance of the valve is improved; the ceramic fiber pad is adopted as a heat insulation material, the ceramic fiber pad has the characteristics of light weight, high heat stability and low heat conductivity, heat can be effectively isolated, the heat damage risk is reduced, the service life of the valve is prolonged, the ceramic fiber pad is placed between the valve body and the actuator, a heat insulation layer is formed, and the influence of heat on filler and other parts of the valve is reduced; the heat dissipation structure is additionally arranged, the good heat dissipation effect can be kept even if a casting valve body is not used, the weight of the valve body is obviously reduced, and the material cost is reduced through the lightweight design.

Description

TECHNICAL FIELD

[0001] The utility model relates to ventilation valve equipment technical field, concretely is a kind of high-temperature-resistant round single-leaf air valve. BACKGROUND

[0002] High-temperature-resistant air valve can effectively regulate or cut off the flow of high-temperature medium in occasions requiring high-temperature gas or liquid flow, such as flue gas treatment in chemical plants, waste gas emission in steel plants, etc. In addition, high-temperature-resistant air valves also play an important role in semiconductor waste gas treatment systems, especially in RTO (Regenerative Thermal Oxidizer) systems. RTO systems decompose organic waste gas through high-temperature oxidation, and high-temperature-resistant air valves are used to control the flow and flow of waste gas, ensuring the stable operation of RTO systems.

[0003] The sealing structure of the valve is easily affected by high-temperature thermal expansion under high-temperature conditions, resulting in insufficient sealing performance. Lack of heat dissipation structure, valve body overheating, leading to actuator failure. In order to prevent or slow down the thermal fatigue phenomenon of the valve, special high-temperature-resistant materials or cast high-temperature-resistant valves are selected, or cooling pipes or other heat dissipation structures are added, but the production cost is too high. The valve body and valve stem connection are provided with packing seal, but this structure is less used in ventilation valves. SUMMARY

[0004] The utility model aims at providing a kind of high-temperature-resistant round single-leaf air valve to solve the problems raised in the above background.

[0005] To solve the above technical problems, the utility model provides the following technical scheme: a kind of high-temperature-resistant round single-leaf air valve, including valve body and electric actuator, the valve body is internally provided with the blade of rotation connection, the blade top and bottom are respectively provided with valve shaft, the valve shaft outer wall is set with graphite sealing packing on the outside of valve body, the electric actuator is fixedly connected with valve shaft by lengthened valve shaft, the lengthened valve shaft is fixedly connected with valve shaft by two valve shaft fixed plates, first heat insulation pad is arranged between two valve shaft fixed plates.

[0006] Further, the valve body outer wall is provided with a base on the outside of the valve shaft, and a lengthened base is provided between the electric actuator and the base. The lengthened base is provided on the outside of the lengthened valve shaft and the valve shaft.

[0007] Further, the lengthened base outer wall is provided with a plurality of fins on both sides, and second heat insulation pads are symmetrically provided on both sides of the base outer wall away from the valve body.

[0008] Further, the first heat insulation pad and the second heat insulation pad are made of ceramic fiber pad.

[0009] Further, the outer wall of the valve shaft is provided with a packing base outside the graphite sealing packing, and the outer wall of the valve shaft is provided with a packing gland outside the packing base, and the packing gland is fixedly connected with the packing base through bolts.

[0010] Further, the inner wall of the valve body is provided with a first blade stopper matched with the blade on one side of the valve shaft, the inner wall of the valve body is provided with a second blade stopper matched with the blade on the other side of the valve shaft, and the first blade stopper and the second blade stopper are respectively arranged on both sides of the blade, one side of the outer wall of the blade is provided with a first sealing stopper matched with the first blade stopper, and the other side of the outer wall of the blade is provided with a second sealing stopper matched with the second blade stopper.

[0011] Further, the outer wall of the valve body is symmetrically provided with flanges on both sides.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] 1、 the utility model discloses a valve body, an electric actuator, a blade, a valve shaft, graphite sealing packing, lengthened valve shaft, valve shaft fixed plate, first heat insulation pad are set up, adopt graphite as packing material, graphite has excellent chemical stability, self -lubricating and high -temperature resistant performance, is suitable for the sealing of ventilation valve, can effectively reduce gas leakage in the service life of valve, improves the sealing performance of valve, adopt ceramic fiber pad as heat insulation material, and ceramic fiber pad has the characteristics of light weight, high thermal stability and low thermal conductivity, can effectively insulate heat, reduces the risk of thermal damage, prolongs the service life of valve, and ceramic fiber pad is arranged between the valve body and the actuator, forms a heat insulation layer, reduces the influence of heat on the packing and other components of the valve, and the ceramic fiber pad heat insulation technology is applied to the ventilation valve, and the heat insulation efficiency is improved, the heat dissipation structure is increased, even if the cast valve body is not used, good heat dissipation effect can be kept, the weight of the valve body is reduced significantly, the lightweight design reduces the material cost, and the response speed and operation efficiency of the valve are improved.

[0014] 2. The utility model discloses, through the lengthening valve shaft and valve shaft connection, can effectively extend the transmission length between the valve body internal temperature and electric actuator, thereby reduce the adverse effect of valve body temperature to electric actuator, the heat dissipation fin is outside the lengthening base and carries out the quick heat dissipation treatment to the heat dissipation of valve shaft and lengthening valve shaft, is used for reducing the surface temperature of valve shaft and lengthening valve shaft, and then reduce the temperature of electric actuator, the second heat insulation pad carries out the heat insulation treatment outside the base, can effectively avoid the valve body surface temperature to its installation fixed component fast transmission, and then avoid the heat to electric actuator transmission, the cooperation of first vane baffle, second vane baffle and vane realizes the sealing treatment to valve body, guarantees vane normal rotation adjustment simultaneously, first sealing baffle and first vane baffle cooperation carry out the sealing treatment to vane one side, and second sealing baffle and second vane baffle cooperation carry out the sealing treatment to vane other side, can effectively improve the sealing performance when valve body closes. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings are included to provide a further understanding of the present utility model, and constitute a part of the specification, and are used together with embodiments of the present utility model to explain the present utility model, and do not constitute the limitation to the present utility model. In the drawings:

[0016] Figure 1 It is the structure schematic diagram of the whole of the utility model;

[0017] Figure 2 It is the main view cross section of the whole of the utility model;

[0018] Figure 3 It is the structure schematic diagram of the vane of the utility model Figure 2 in A place;

[0019] Figure 4 It is the structure schematic diagram of the valve body of the utility model;

[0020] Figure 5 It is the structure schematic diagram of one side of the vane of the utility model;

[0021] Figure 6 It is the structure schematic diagram of the other side of the vane of the utility model;

[0022] In the drawing: 1, valve body;2, electric actuator;3, vane;4, valve shaft;5, graphite sealing filler;6, lengthening valve shaft;7, valve shaft fixed plate;8, first heat insulation pad;9, base;10, lengthening base;11, heat dissipation fin;12, second heat insulation pad;13, filler base;14, filler gland;15, flange plate;16, first vane baffle;17, second vane baffle;18, first sealing baffle;19, second sealing baffle. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0024] Please refer to Figures 1-6 The utility model provides technical scheme: a kind of high temperature resistant round single leaf air valve, including valve body 1 and electric actuator 2, the inside of the valve body 1 is equipped with the blade 3 of rotation connection, the blade 3 top and bottom are equipped with valve shaft 4 respectively, graphite sealing packing 5 is sleeved on the outer wall of valve shaft 4 outside valve body 1, electric actuator 2 is fixedly connected with valve shaft 4 by lengthened valve shaft 6, lengthened valve shaft 6 is fixedly connected with valve shaft 4 by two valve shaft fixing plates 7, first heat insulation pad 8 is equipped between two valve shaft fixing plates 7.

[0025] In an embodiment, the outer wall of the valve body 1 is provided with a base 9 outside the valve shaft 4, and a lengthened base 10 is provided between the electric actuator 2 and the base 9. The lengthened base 10 is provided outside the lengthened valve shaft 6 and the valve shaft 4, and the base 9 is protected and supported outside the valve shaft 4. By connecting the lengthened valve shaft 6 and the valve shaft 4, the transmission length between the temperature inside the valve body 1 and the electric actuator 2 can be effectively prolonged, thereby reducing the adverse effects of the temperature of the valve body 1 on the electric actuator. The lengthened base 10 supports the lengthened valve shaft 6 and the valve shaft 4 outside, thereby ensuring the stability of the lengthened valve shaft 6 and the valve shaft 4. The outer wall of the lengthened base 10 is provided with a plurality of heat dissipation fins 11 on both sides, which quickly dissipate the heat generated by the heat dissipation of the valve shaft 4 and the lengthened valve shaft 6 outside the lengthened base 10, thereby reducing the surface temperature of the valve shaft 4 and the lengthened valve shaft 6, and further reducing the temperature of the electric actuator 2. The outer wall of the base 9 is symmetrically provided with a second heat insulation pad 12 on both sides away from the valve body 1, and the second heat insulation pad 12 is heat insulated outside the base 9, which can effectively prevent the surface temperature of the valve body 1 from being quickly transmitted to the installed components, thereby preventing heat from being transmitted to the electric actuator 2.

[0026] In an embodiment, the first heat insulation pad 8 and the second heat insulation pad 12 are made of ceramic fiber pad. The ceramic fiber pad is used as a heat insulation material, which has the characteristics of light weight, high thermal stability and low thermal conductivity, can effectively insulate heat, reduce the risk of thermal damage, and prolong the service life of the valve.

[0027] In one embodiment, the outer wall of the valve shaft 4 is provided with a packing base 13 outside the graphite sealing packing 5, the outer wall of the valve shaft 4 is provided with a packing gland 14 outside the packing base 13, the packing gland 14 is fixedly connected with the packing base 13 through bolts, the packing base 13 provides installation support protection for the outer side of the graphite sealing packing 5, and the packing gland 14 is used for pressing and sealing the packing base 13 and the graphite sealing packing 5.

[0028] In one embodiment, the inner wall of the valve body 1 is provided with a first blade blocking strip 16 matched with the blade 3 on one side of the valve shaft 4, the inner wall of the valve body 1 is provided with a second blade blocking strip 17 matched with the blade 3 on the other side of the valve shaft 4, and the first blade blocking strip 16 and the second blade blocking strip 17 are respectively arranged on both sides of the blade 3, the first blade blocking strip 16 performs blocking and sealing treatment on the blade 3 on one side of the inner wall of the valve body 1, the second blade blocking strip 17 performs blocking and sealing treatment on the blade 3 on the other side of the inner wall of the valve body 1, and the cooperation of the first blade blocking strip 16, the second blade blocking strip 17 and the blade 3 realizes the sealing treatment of the valve body 1, while ensuring that the blade 3 can be normally rotated and adjusted; one side of the outer wall of the blade 3 is provided with a first sealing blocking strip 18 matched with the first blade blocking strip 16, the other side of the outer wall of the blade 3 is provided with a second sealing blocking strip 19 matched with the second blade blocking strip 17, the first sealing blocking strip 18 cooperates with the first blade blocking strip 16 to seal one side of the blade 3, and the second sealing blocking strip 19 cooperates with the second blade blocking strip 17 to seal the other side of the blade 3, which can effectively improve the sealing performance of the valve body 1 when closed.

[0029] In one embodiment, the outer wall of the valve body 1 is symmetrically provided with a flange plate 15 on both sides, and the flange plate 15 is used for connecting the valve body 1 with a ventilation pipeline.

[0030] The working principle of the utility model:

[0031] Referring to the drawings in the specification Figures 1-6 The utility model discloses a valve body 1, an electric actuator 2, a blade 3, a valve shaft 4, graphite sealing packing 5, lengthened valve shaft 6, valve shaft fixing plate 7, first heat insulation pad 8 are set up,

[0032] Open holes at the upper and lower ends of the valve body 1 and weld and fix the packing base 13; pass the upper and lower valve shafts 4 through the packing base 13, insert them into the valve body 1, clamp the blade 3, and fix the blade connecting plate with 310S bolts; place the graphite sealing packing 5 in the annular space between the valve shaft 4 and the packing base 13, install the packing gland 14, and fix it with 310S studs to ensure that the packings are closely arranged without gaps; weld the base 9 to the flange 15, install the bearing seat, weld the extended base to the heat sink, and weld the two valve shaft fixing plates 7 to the valve shaft 4 and the extended valve shaft 6 respectively; use 310S bolts to fix the extended base 10 and the extended valve shaft 6, and place thermal insulation pads (ceramic fiber pads) at the connection between the extended base 10 and the base 9 and at the connection between the two valve shaft fixing plates 7; finally, install the actuator;

[0033] The traditional valve packing seal structure is mainly used for valves in liquid environments to achieve good sealing effect and reduce medium leakage. Improving this structure and applying it to ventilation valves is an innovative attempt to improve the sealing performance and reliability of ventilation valves.

[0034] Improved sealing performance: Graphite is used as the filler material. Graphite has excellent chemical stability, self-lubrication and high temperature resistance, making it suitable for sealing ventilation valves. It can effectively reduce gas leakage and improve the sealing performance of the valve during its service life.

[0035] Enhanced heat resistance: By using 310S material bolts and studs, the reliability and stability of the valve in high temperature environment are enhanced;

[0036] Improved thermal insulation efficiency: Ceramic fiber mats are used as thermal insulation materials. They are lightweight, highly thermally stable, and have low thermal conductivity. They effectively isolate heat, reduce the risk of thermal damage, and extend the life of the valve. Placing a ceramic fiber mat between the valve body 1 and the actuator forms an insulating layer, reducing the impact of heat on the packing and other valve components. Applying ceramic fiber mat insulation technology to ventilation valves aims to improve thermal insulation efficiency.

[0037] Reduction of valve body weight: The addition of a heat dissipation structure ensures good heat dissipation even without using a cast valve body, and significantly reduces the weight of the valve body 1. The lightweight design reduces material costs and improves the valve's response speed and operating efficiency.

[0038] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application have been described in detail, for the skilled in the art, it still can be modified, or for the equivalent replacement of part of the technical features of the technical solutions recorded in the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, shall be included within the scope of the present application.

Claims

1. A high temperature resistant round single leaf damper comprising a valve body (1) and an electric actuator (2), characterized in that: The valve body (1) is internally provided with a rotatingly connected blade (3), the top and bottom of the blade (3) are respectively provided with a valve shaft (4), the outer wall of the valve shaft (4) is externally provided with a graphite sealing packing (5) on the outer side of the valve body (1), the electric actuator (2) is fixedly connected with the valve shaft (4) through an extended valve shaft (6), the extended valve shaft (6) is fixedly connected with the valve shaft (4) through two valve shaft fixing plates (7), and a first heat insulation pad (8) is arranged between the two valve shaft fixing plates (7).

2. A high temperature resistant round single leaf damper according to claim 1, characterized in that: The outer wall of the valve body (1) is externally provided with a base (9) on the outer side of the valve shaft (4), a lengthened base (10) is arranged between the electric actuator (2) and the base (9), and the lengthened base (10) is arranged on the outer side of the extended valve shaft (6) and the valve shaft (4).

3. A high temperature resistant round single leaf damper according to claim 2, characterized in that: The outer wall of the lengthened base (10) is provided with a plurality of heat dissipation fins (11) on both sides, and the outer wall of the base (9) is symmetrically provided with a second heat insulation pad (12) on both sides away from the valve body (1).

4. A high temperature resistant circular single leaf air damper as claimed in claim 3, wherein: The first heat insulation pad (8) and the second heat insulation pad (12) are made of ceramic fiber pad.

5. A high temperature resistant circular single leaf damper as claimed in claim 1, wherein: The outer wall of the valve shaft (4) is externally provided with a packing base (13) on the outer side of the graphite sealing packing (5), and the outer wall of the valve shaft (4) is externally provided with a packing gland (14) on the outer side of the packing base (13), and the packing gland (14) is fixedly connected with the packing base (13) through bolts.

6. A high temperature resistant round single leaf damper according to claim 1, characterized in that: The inner wall of the valve body (1) is provided with a first blade stop bar (16) matched with the blade (3) on one side of the valve shaft (4), the inner wall of the valve body (1) is provided with a second blade stop bar (17) matched with the blade (3) on the other side of the valve shaft (4), and the first blade stop bar (16) and the second blade stop bar (17) are respectively arranged on both sides of the blade (3), one side of the outer wall of the blade (3) is provided with a first sealing stop bar (18) matched with the first blade stop bar (16), and the other side of the outer wall of the blade (3) is provided with a second sealing stop bar (19) matched with the second blade stop bar (17).

7. A high temperature resistant round single leaf damper according to claim 1, characterized in that: The outer wall of the valve body (1) is symmetrically provided with a flange plate (15) on both sides.

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