High-temperature dome valve

Abstract

The utility model relates to the technical field of valves, and discloses a high-temperature dome valve which comprises a valve body, a valve element arranged in the valve body, a through material channel arranged on the valve element, a rotating shaft connected with two sides of the valve element and penetrating through the valve body, a driving device arranged on the outer side of the valve body and used for driving the rotating shaft to rotate, a top plate arranged at the upper end of the valve body, and a top plate opening arranged in the middle of the top plate. The dome valve further comprises a water cooling system, the water cooling system comprises a valve element cooling device, a valve body cooling device and a top plate cooling device, the valve element cooling device, the valve body cooling device and the top plate cooling device are communicated in sequence, and a sealing device is arranged on the side, close to the valve element, of the top plate. According to the dome valve, the water cooling system and the air cooling system are arranged, so that the working temperature of the inflation sealing ring is effectively reduced, the service life of the sealing device is prolonged, and normal work of the high-temperature dome valve is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a high-temperature dome valve. Background Art

[0002] High temperature dome valve is the main sealing valve in pneumatic conveying. It is widely used in metallurgy, power plants, thermal power and other fields to pneumatically convey powdered materials. The traditional dome valve has poor high temperature resistance under high temperature conditions, resulting in poor sealing effect and short service life of the seal, which seriously affects the normal use of the dome valve and the conveying effect of high temperature powders. Utility Model Content

[0003] The utility model provides a high-temperature dome valve, which effectively reduces the working temperature of an inflatable sealing ring by arranging a water cooling system and an air cooling system, increases the service life of the sealing device, and ensures the normal operation of the high-temperature dome valve.

[0004] The above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0005] A high-temperature dome valve comprises a valve body, the valve body is in the shape of a cylinder with upper and lower openings, a valve core is arranged in the valve body, the valve core is provided with a through material channel, rotating shafts connected to the valve core are respectively arranged on both sides of the material channel, the rotating shaft passes through the side wall of the valve body, a driving device for driving the rotating shaft to rotate is arranged on the outer side of the valve body, a top plate is arranged at the upper end of the valve body, a top plate opening corresponding to the upper opening of the valve body is arranged in the middle of the top plate, the top plate opening is an annular wall on the side close to the valve core, the annular wall is adapted to the outer wall of the valve core, when the driving device drives the valve core to rotate and makes the material channel and the top plate opening communicate with each other, the valve core opens the dome valve, when the driving device drives the valve core to rotate and makes the material channel and the top plate opening not communicate with each other, the valve core cuts off the dome valve, and also comprises a water cooling system, the water cooling system comprises a valve core cooling device, a valve body cooling device and a top plate cooling device which are connected in sequence, and a sealing device is arranged on the side of the top plate close to the valve core.

[0006] The above-mentioned high-temperature dome valve, wherein the valve core cooling device includes a valve core cooling cavity opened in the valve core along the circumference of the material channel, and the two rotating shafts are respectively provided with through cooling water channels along the axial direction, the cooling water channels are connected to the valve core cooling cavity, and the inlet of the cooling water channel is connected to the water inlet valve.

[0007] The above-mentioned high-temperature dome valve, wherein the cooling water channel includes a first through hole, a first diverter chamber, a second through hole, a second diverter chamber and a diverter hole which are sequentially connected from the outside to the inside, the first through hole is arranged along the axial direction of the rotating shaft, the second through holes include four and are distributed on opposite sides of the first through hole, the first diverter chamber is respectively connected to the first through hole and the second through hole, the second diverter chamber is connected to the other end of the second through hole, the diverter hole includes two, the two diverter holes are arranged opposite to each other and are respectively connected to the second diverter chamber and the valve core cooling chamber.

[0008] The above-mentioned high-temperature dome valve, wherein the valve body cooling device includes a valve body cooling cavity opened circumferentially in the side wall of the valve body, a valve body water inlet is provided at the outer bottom of the valve body cooling cavity, and a valve body water outlet is provided at the outer top of the valve body cooling cavity; the valve body water inlet is connected to the outlet of the cooling water channel.

[0009] The above-mentioned high-temperature dome valve, wherein the top plate cooling device includes a water-cooled plate attached to the upper surface of the top plate, a water-cooled plate opening corresponding to the top plate opening is provided in the middle of the water-cooled plate, a water-cooled plate cooling cavity is provided in the water-cooled plate along the circumference of the water-cooled plate opening, and a water-cooled plate water inlet and a water-cooled plate water outlet communicating with the water-cooled plate cooling cavity are provided at intervals on the side of the water-cooled plate; the water-cooled plate water inlet is connected to the water outlet of the valve body, and the water-cooled plate water outlet is respectively connected to a safety valve and a temperature sensor.

[0010] In the above-mentioned high-temperature dome valve, a drain valve is connected between the outlet of the cooling water channel and the water inlet of the valve body.

[0011] The above-mentioned high-temperature dome valve, wherein the sealing device includes an upper ring body, an inflatable sealing ring, and a lower ring body. The upper ring body is clamped on the side of the top plate close to the valve core, and the lower ring body is located below the upper ring body and clamped on the top plate. The inflatable sealing ring is C-shaped, and the upper and lower side edges of the inflatable sealing ring are clamped on the upper and lower sides of the upper ring body. After being inflated, the inflatable sealing ring abuts against the valve core, and an air-filling and air-proof passage connecting the inflatable sealing ring is provided in the upper ring body and the top plate.

[0012] The above-mentioned high-temperature dome valve, among other things, also includes an air cooling system, which includes a first air chamber between the top plate and the water-cooled top plate close to one side of the valve core, a first air passage connected to the first air chamber is provided in the top plate, a second air chamber is provided between the valve body and the lower ring body, a second air passage connected to the second air chamber is provided in the valve body, and the air outlet of the first air chamber and the air outlet of the second air chamber are respectively connected to the inner cavity of the valve body.

[0013] The above-mentioned high-temperature dome valve, wherein the valve core includes a spherical outer sleeve and a cylindrical inner sleeve, both ends of the inner sleeve pass through the outer sleeve and are respectively sealed with the outer sleeve, a valve core cooling cavity is formed between the outer sleeve and the inner sleeve, and the inner cavity of the inner sleeve forms a material channel.

[0014] The above-mentioned high-temperature dome valve, wherein a support portion is fixedly connected between the inner sleeve and the outer sleeve.

[0015] In summary, the beneficial technical effects of the utility model are:

[0016] The utility model effectively reduces the working temperature of the dome valve by arranging a water cooling system, wherein the valve core cooling device reduces the working temperature of the valve core, the valve body cooling device reduces the working temperature of the valve body, and the top plate cooling device reduces the working temperature of the top plate; the combined effect of the water cooling system also effectively reduces the working temperature of the inflatable sealing ring, thereby increasing the service life of the sealing device.

[0017] By setting up an air cooling system, the heat transfer of the high-temperature material to the inflatable sealing ring when the valve core is cut off is effectively reduced, the inflatable sealing ring is avoided from being affected by the high-temperature environment, the working conditions of the inflatable sealing ring are improved, and the service life of the high-temperature dome valve is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of the valve core of the utility model in the cut-off state;

[0019] Figure 2 yes Figure 1 A magnified view of part A;

[0020] Figure 3 yes Figure 1 A magnified view of part B;

[0021] Figure 4 yes Figure 1 Structural diagram of the valve core being filled with cooling water;

[0022] Figure 5 It is a structural diagram of the valve core being filled with cooling water and in the open state.

[0023] As shown in the figure, 1. valve body; 2. valve core; 21. outer sleeve; 22. inner sleeve; 23. material channel; 24. support part; 3. rotating shaft; 31. cooling water channel; 311. first through hole; 312. first diversion chamber; 313. second through hole; 314. second diversion chamber; 315. diversion hole; 4. driving device; 5. top plate; 51. top plate opening; 6. water cooling system; 61. valve core cooling device; 611. valve core cooling chamber; 62. Valve body cooling device; 621, valve body cooling cavity; 622, valve body water inlet; 623, valve body water outlet; 63, top plate cooling device; 631, water-cooled plate; 632, water-cooled plate cooling cavity; 633, water-cooled plate water inlet; 7, sealing device; 71, upper ring body; 72, inflatable sealing ring; 73, lower ring body; 8, air cooling system; 81, first air chamber; 82, first air duct; 83, second air chamber; 84, second air duct. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-5 The utility model is described in further detail.

[0025] like Figure 1 , 2 As shown, a high-temperature dome valve comprises a valve body 1, which is in the shape of a cylinder with upper and lower openings. A valve core 2 is arranged in the valve body 1, and the valve core 2 is provided with a through material channel 23. Rotating shafts 3 connected to the valve core 2 are respectively arranged on both sides of the material channel 23. The two rotating shafts 3 are coaxially arranged, and the axis of the rotating shaft 3 is perpendicular to the axis of the material channel 23. The rotating shaft 3 passes through the side wall of the valve body 1, and a driving device 4 for driving the rotating shaft 3 to rotate is arranged on the outer side of the valve body 1; a top plate 5 is arranged on the upper end of the valve body 1, and a top plate opening 51 corresponding to the upper opening of the valve body 1 is arranged in the middle of the top plate 5, and the material channel 23 is adapted to correspond to the top plate opening 51, and the top plate opening 51 is an annular wall near the valve core 2, and the annular wall is connected to the outer wall of the valve core 2. Adaptation, the driving device 4 drives the rotating shaft 3 to rotate, the rotating shaft 3 drives the valve core 2 to rotate and makes the material channel 23 and the top plate port 51 correspondingly connected, at this time the valve core 2 opens the dome valve, and the high-temperature material enters from the upper opening of the valve body 1, and flows downward out of the lower opening of the valve body 1 through the material channel 23; the driving device 4 drives the rotating shaft 3 to rotate 90°, and the corresponding valve core 2 rotates 90 degrees, the material channel 23 and the top plate port 51 are not connected, at this time, the valve core 2 cuts off the dome valve, and the high-temperature dome valve also includes a water cooling system 6, the water cooling system 6 includes a valve core cooling device 61, a valve body cooling device 62 and a top plate cooling device 63 which are connected in sequence, and a sealing device 7 is provided on the top plate 5 close to the valve core 2.

[0026] like Figure 1 As shown, the valve core cooling device 61 includes a valve core cooling cavity 611 opened in the valve core 2 along the circumference of the material channel 23, and the two rotating shafts 3 are respectively provided with through cooling water channels 31 along the axial direction, and the cooling water channels 31 are connected to the valve core cooling cavity 611; wherein, the cooling water channel 31 in one rotating shaft 3 is the inlet channel of the cooling water, and the cooling water channel 31 in the other rotating shaft 3 is the outlet channel of the cooling water, and the inlet of the cooling water channel 31 is connected to the water inlet valve.

[0027] like Figure 1 , 5 As shown, the valve core 2 of this embodiment includes a spherical outer sleeve 21 and a cylindrical inner sleeve 22. Both ends of the inner sleeve 22 pass through the outer sleeve 21 and are respectively sealed with the outer sleeve 21. A valve core cooling cavity 611 is formed between the outer sleeve 21 and the inner sleeve 22, and the inner cavity of the inner sleeve 22 forms a material channel 23.

[0028] In order to improve the strength of the valve core cooling cavity 611, a support portion 24 is fixedly connected between the inner sleeve 22 and the outer sleeve 21. The support portion 24 can be a support rod or a support block.

[0029] In this embodiment, the cooling water channel 31 in the rotating shaft 3 connected to the driving device 4 is selected as the inlet channel of the cooling water. After the water inlet valve is opened, the cooling water enters the valve core cooling cavity 611 through the cooling water channel 31, and then flows out from the cooling water channel 31 in another rotating shaft 3. The cooling water in the valve core cooling cavity 611 is used to cool the valve core 2.

[0030] like Figure 1 , 3 As shown, the cooling water channel 31 includes a first through hole 311, a first diverter chamber 312, a second through hole 313, a second diverter chamber 314 and a diverter hole 315 which are connected in sequence from the outside to the inside. The first through hole 311 is arranged along the axial direction of the rotating shaft 3. The second through holes 313 include four and are distributed on the opposite sides of the first through hole 311. The first diverter chamber 312 connects the first through hole 311 and the second through hole 313 respectively. The second diverter chamber 314 is connected to the other end of the second through hole 313. The diverter hole 315 includes two. The two diverter holes 315 are arranged opposite to each other and are respectively connected to the second diverter chamber 314 and the valve core cooling chamber 611.

[0031] The cooling water first enters the first diverter chamber 312 from the entrance of the first through hole 311, and then flows from the first diverter chamber 312 into the four second through holes 313. The cooling water flowing out of the second through hole 313 enters the second diverter chamber 314, and the cooling water in the second diverter chamber 314 enters the valve core cooling chamber 611 through the diverter hole 315. The first diverter chamber 312 and the second diverter chamber 314 can ensure the stability of the cooling water flow, and the two opposite diverter holes 315 can ensure that the cooling water flows out of the second diverter chamber 314 and flows into the two hemispheres of the valve core cooling chamber 611 in opposite directions, thereby ensuring the uniformity of the cooling of the valve core 2.

[0032] The valve body cooling device 62 includes a valve body cooling cavity 621 circumferentially opened in the side wall of the valve body 1. The valve body cooling cavity 621 can adopt a double-layer plate structure. The outer bottom of the valve body cooling cavity 621 is provided with a valve body water inlet 622 connected to the valve body cooling cavity 621, and the outer top of the valve body cooling cavity 621 is provided with a valve body water outlet 623 connected to the valve body cooling cavity 621. This arrangement can ensure that cooling water enters from the bottom of the valve body cooling cavity 621, and can only be discharged from the valve body water outlet 623 after filling the entire valve body cooling cavity 621. The valve body water inlet 622 is connected to the outlet of the cooling water channel 31.

[0033] The cooling water discharged from the outlet of the cooling water channel 31 enters into the valve body cooling cavity 621 through the valve body water inlet 622 , thereby achieving cooling of the valve body 1 by the cooling water.

[0034] The top plate cooling device 63 includes a water-cooled plate 631 attached to the upper surface of the top plate 5, the water-cooled plate 631 is connected to the top plate 5 by bolts, a water-cooled plate opening corresponding to the top plate opening 51 is provided in the middle of the water-cooled plate 631, an annular water-cooled plate cooling cavity 632 is provided in the water-cooled plate 631 along the circumference of the water-cooled plate opening, and a water-cooled plate water inlet 633 and a water-cooled plate water outlet (not shown in the figure) communicating with the water-cooled plate cooling cavity 632 are provided at intervals on the side of the water-cooled plate 631; the water-cooled plate water inlet 633 is connected to the valve body water outlet 623, and the water-cooled plate water outlet is respectively connected to the safety valve and the temperature sensor.

[0035] The cooling water in the water-cooled plate cooling cavity 632 can conduct cooling to the top plate 5. The cooling water flowing out from the valve body water outlet 623 enters the water-cooled plate cooling cavity 632 through the water-cooled plate water inlet 633, and is then discharged from the water-cooled plate water outlet, completing the cooling cycle of the entire water cooling system 6.

[0036] The cooling water of the utility model passes through the valve core cooling device 61, the valve body cooling device 62, and the top plate cooling device 63 in sequence to cool the valve core 2, the valve body 1, and the top plate 5. The cooling water discharged from the water outlet of the water cooling plate can sense the temperature of the cooling water in the water cooling system 6 through the temperature sensor, thereby adjusting the water inlet valve at the entrance of the cooling water channel 31, controlling the flow rate of the cooling water inlet, and ensuring that the cooling temperature of the cooling water meets the specified requirements.

[0037] In order to facilitate the discharge of cooling water when production is stopped, a drain valve is connected between the outlet of the cooling water channel 31 and the water inlet 622 of the valve body.

[0038] like Figure 1 , 2 As shown, the sealing device 7 of this embodiment includes an upper ring body 71, an inflatable sealing ring 72, and a lower ring body 73. The upper ring body 71 is clamped on the side of the top plate 5 close to the valve core 2, and the lower ring body 73 is located below the upper ring body 71 and clamped with the top plate 5. The inflatable sealing ring 72 is C-shaped, and the upper and lower sides of the inflatable sealing ring 72 are clamped on the upper and lower sides of the upper ring body 71. After the inflatable sealing ring 72 is inflated, it abuts against the valve core 2. The upper ring body 71 and the top plate 5 are provided with an air charging and discharging channel communicating with the inflatable sealing ring 72. The air charging and discharging channel is connected to the interface of the compressed air to realize the inflation or deflation of the inflatable sealing ring 72.

[0039] Figure 1 , 2 As shown, the utility model also includes an air cooling system 8, which includes a first air chamber 81 between the top plate 5 and the water-cooled top plate 5 close to the valve core 2 side, a first air duct 82 connected to the first air chamber 81 is provided in the top plate 5, a second air chamber 83 is provided between the valve body 1 and the lower ring body 73, a second air duct 84 connected to the second air chamber 83 is provided in the valve body 1, and the air outlet of the first air chamber 81 and the air outlet of the second air chamber 83 are respectively connected to the inner cavity of the valve body 1.

[0040] like Figure 2 As shown, the high-pressure gas entering from the first air channel 82 enters the inner cavity of the valve body 1 through the first air chamber 81. Since the inflatable sealing ring 72 is sealed with the valve core 2, the high-pressure gas is discharged through the gap between the valve core 2 and the water-cooled plate 631 in the direction away from the inflatable sealing ring 72; the high-pressure gas entering from the second air channel 84 enters the inner cavity of the valve body 1 through the second air chamber 83. Since the inflatable sealing ring 72 is sealed with the valve core 2, the high-pressure gas is discharged through the gap between the valve core 2 and the lower ring body 73 in the direction away from the inflatable sealing ring 72; since the hot air is flowing, the air cooling system 8 is used for high-pressure gas sealing protection sealing, which effectively avoids heat conduction of high-temperature materials, reduces heat conduction of the inflatable sealing ring 72, reduces the working temperature of the inflatable sealing ring 72, improves its service life, and ensures the sealing effect of the high-temperature dome valve.

[0041] like Figure 1 As shown, the valve core 2 is in a cut-off state, and materials above 600°C are in contact with the top plate 5 and the valve core 2 at the upper part of the valve body 1. The top plate 5 is cooled by the top plate cooling device 63, and the valve core 2 is cooled by the valve core cooling device 61 to keep the temperature below 100°C. The inflatable sealing ring 72 is in an inflated and sealed state, and the inflatable sealing ring 72 is in contact with the valve core 2 to achieve a sealing effect. The inflatable sealing ring 72 is surrounded by the top plate 5, the lower ring body 73 and the valve core 2, whose temperatures are below 100°C, and under the joint action of the air cooling system 8, its temperature is kept below 150°C, ensuring that the inflatable sealing ring can work normally below 200°C.

[0042] like Figure 5As shown, the valve core 2 of the high-temperature dome valve is in an open state. When the high-temperature dome valve is opened, the inflatable sealing ring 72 is first deflated. After the inflatable sealing ring 72 is deflated, there is a certain gap between it and the valve core 2. The valve core 2 is rotated 90 degrees by the driving device 4. At this time, the material channel 23 on the valve core 2 is opposite to the top plate port 51. The material above 600°C flows from the upper part of the high-temperature dome valve, that is, the upper opening of the valve body 1, through the top plate port 51 and the material channel 23 to the lower opening of the valve body 1. The top plate 5 and the valve core 2 are in contact with the material above 600°C. The top plate 5 and the valve core 2 are cooled by the top plate cooling device 63 and the valve core cooling device 61. The temperature of the top plate 5 and the valve core 2 is kept below 150°C. The lower ring body 73 and the valve body 1 are radiated by the heat of the material above 600°C. The lower ring body 73 The temperature of the valve body 1 is kept below 100°C under the cooling of the valve body cooling device 62. The inflatable sealing ring 72 is in a deflated state at this time. It is wrapped by the lower ring body 73 whose temperature is below 100°C and the upper ring body 71 whose temperature is below 150°C. Surrounded by the valve core 2 whose temperature is below 150°C, the temperature of the inflatable sealing ring 72 is kept below 150°C, thereby ensuring the normal working conditions of the inflatable sealing ring 72 below 200°C. During the reversing process of the valve core 2, the inflatable sealing ring 72 can be deflated to ensure that the valve core 2 and the inflatable sealing ring 72 are not in contact and are not worn.

[0043] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A high-temperature dome valve, comprising a valve body, the valve body is in the shape of a cylinder with upper and lower openings, a valve core is arranged in the valve body, the valve core is provided with a through material channel, rotating shafts connected to the valve core are respectively arranged on both sides of the material channel, the rotating shaft passes through the side wall of the valve body, a driving device for driving the rotating shaft to rotate is arranged on the outer side of the valve body, a top plate is arranged on the upper end of the valve body, a top plate opening corresponding to the upper opening of the valve body is arranged in the middle of the top plate, the top plate opening is an annular wall on the side close to the valve core, the annular wall is adapted to the outer wall of the valve core, when the driving device drives the valve core to rotate and makes the material channel and the top plate opening communicate with each other, the valve core opens the dome valve, when the driving device drives the valve core to rotate and makes the material channel and the top plate opening not communicate with each other, the valve core cuts off the dome valve, characterized in that It also includes a water cooling system, which includes a valve core cooling device, a valve body cooling device and a top plate cooling device that are connected in sequence, and a sealing device is provided on the top plate near the valve core.

2. The high temperature dome valve according to claim 1, characterized in that: The valve core cooling device includes a valve core cooling cavity opened in the valve core along the circumference of the material channel, and the two rotating shafts are respectively provided with cooling water channels that penetrate along the axial direction. The cooling water channels are connected to the valve core cooling cavity, and the inlet of the cooling water channels is connected to the water inlet valve.

3. The high temperature dome valve according to claim 2, characterized in that: The cooling water channel includes a first through hole, a first diverter cavity, a second through hole, a second diverter cavity and a diverter hole which are connected in sequence from the outside to the inside. The first through hole is arranged along the axial direction of the rotating shaft. The second through holes include four and are distributed on opposite sides of the first through hole. The first diverter cavity is respectively connected to the first through hole and the second through hole. The second diverter cavity is connected to the other end of the second through hole. The diverter hole includes two. The two diverter holes are arranged opposite to each other and are respectively connected to the second diverter cavity and the valve core cooling cavity.

4. The high temperature dome valve according to claim 2, characterized in that: The valve body cooling device includes a valve body cooling cavity opened circumferentially in the side wall of the valve body, a valve body water inlet is provided at the outer bottom of the valve body cooling cavity, and a valve body water outlet is provided at the outer top of the valve body cooling cavity; the valve body water inlet is connected to the outlet of the cooling water channel.

5. The high temperature dome valve according to claim 4, characterized in that: The top plate cooling device includes a water-cooling plate attached to the upper surface of the top plate, a water-cooling plate opening corresponding to the top plate opening is provided in the middle of the water-cooling plate, a water-cooling plate cooling cavity is provided in the water-cooling plate along the circumference of the water-cooling plate opening, and a water-cooling plate water inlet and a water-cooling plate water outlet communicating with the water-cooling plate cooling cavity are provided at intervals on the side of the water-cooling plate; the water-cooling plate water inlet is connected to the water outlet of the valve body, and the water-cooling plate water outlet is respectively connected to a safety valve and a temperature sensor.

6. The high temperature dome valve according to claim 4, characterized in that: A drain valve is connected between the outlet of the cooling water channel and the water inlet of the valve body.

7. The high temperature dome valve according to claim 1, characterized in that: The sealing device includes an upper ring body, an inflatable sealing ring, and a lower ring body. The upper ring body is clamped on the side of the top plate close to the valve core, the lower ring body is located below the upper ring body and clamped on the top plate, the inflatable sealing ring is C-shaped, and the upper and lower side edges of the inflatable sealing ring are clamped on the upper and lower sides of the upper ring body. After being inflated, the inflatable sealing ring abuts against the valve core, and an air-filling and air-proof passage connecting the inflatable sealing ring is provided in the upper ring body and the top plate.

8. The high temperature dome valve according to claim 1, characterized in that: It also includes an air cooling system, which includes a first air chamber between the top plate and the water-cooled top plate close to one side of the valve core, a first air channel connected to the first air chamber is provided in the top plate, a second air chamber is provided between the valve body and the lower ring body, a second air channel connected to the second air chamber is provided in the valve body, and the air outlet of the first air chamber and the air outlet of the second air chamber are respectively connected to the inner cavity of the valve body.

9. The high temperature dome valve according to claim 1, characterized in that: The valve core comprises a spherical outer sleeve and a cylindrical inner sleeve, two ends of the inner sleeve penetrate the outer sleeve and are respectively sealed with the outer sleeve, a valve core cooling cavity is formed between the outer sleeve and the inner sleeve, and the inner cavity of the inner sleeve forms a material channel.

10. The high temperature dome valve according to claim 9, characterized in that: The inner sleeve and the outer sleeve are fixedly connected with a support portion.

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