CN209990917U - Leakage-free high-temperature air valve - Google Patents

Abstract

The utility model discloses a no leakage high temperature blast gate, including valve body, slip set up in the guide pillar of valve body and be fixed in the linear drive device of valve body, the valve body is equipped with into wind gap, air outlet and feeds through in the vent between income wind gap and air outlet, and the valve body internal fixation has the vent sealing washer around the vent, and guide pillar end-to-end connection has just to the valve plate of vent sealing washer, and linear drive device orders about the valve plate through the guide pillar and compresses tightly to the vent sealing washer or leave. The utility model discloses a no leakage high temperature blast gate has adopted the structural principle design of stop valve, utilizes the valve plate to press on the vent sealing washer in order to seal the vent to keep apart and realize closing of blast gate with the air outlet with going into the wind gap, owing to do not have the pivot structure, consequently can overcome the pivot department that exists among the prior art and seal badly and lead to the problem of leaking. When the valve plate compresses the vent sealing ring, the valve plate and the vent sealing ring are tightly combined, so that a good sealing effect is achieved, and heat loss is effectively avoided.

Description

No leakage high temperature damper

technical field

The utility model relates to an air valve, in particular to a leakage-free high temperature air valve.

Background technique

The waste gas generated by the gluing machine in the production process is pyrolyzed by the incinerator at high temperature and provides thermal energy for the gluing machine. During this process, the temperature in the incinerator furnace can exceed 1000℃. A bypass safety air valve is designed between the furnace chamber of the incinerator and the external chimney. When an abnormal over-temperature and over-pressure alarm occurs in the incinerator, the bypass air valve needs to be opened in time to quickly reduce the temperature and pressure in the furnace to safe values. , so as to eliminate security risks in time. On the other hand, under normal working conditions, the air valve needs to meet the sealing requirements when it is closed, so as to avoid the loss of heat energy in the furnace and increase the energy consumption.

Because the exhaust temperature of the thermal bypass valve of the glue machine incinerator is up to about 300 ℃, it is difficult for ordinary air valves to meet the requirements of use. The structure of the currently commonly used high-temperature air valve is shown in Figures 1 and 2. It includes a square valve body 91 with an inner hollow opening at both ends and a valve plate 92 rotatably arranged in the valve body 91. The inner wall of the valve body 91 has a The middle part is also provided with retaining rings 93 at the upper and lower ends, respectively. When the valve plate 92 is in the horizontal position as shown in the figure, the openings at both ends of the valve body 91 are connected, so that the temperature and pressure of the exhaust gas can be realized. When the valve plate 92 rotates 90 degrees in the direction of the arrow in FIG. 2 , the upper and lower ends of the valve plate 92 abut against the two retaining rings 93 respectively to block the interior of the valve body 91 , and the damper is in a closed state under normal operating conditions.

However, the problem with this type of rotating flap structure is that it is difficult to seal between the positions of the shafts at both ends of the valve plate 92 and the valve body 91, and the air valve leaks at the position in the closed state, resulting in thermal energy loss under normal operating conditions.

Therefore, in order to improve the leakage problem, it is necessary to provide a high-temperature damper with good sealing performance.

Utility model content

The purpose of the utility model is to provide a high-temperature air valve with good sealing performance.

In order to achieve the above purpose, the present invention provides a leakage-free high-temperature air valve, comprising a valve body, a guide post slidably arranged on the valve body, and a linear drive device fixed on the valve body, the valve body is provided with An air inlet, an air outlet and a ventilation port connected between the air inlet and the air outlet, a ventilation port sealing ring surrounding the ventilation port is fixed in the valve body, and the end of the guide post is connected with a ventilation port facing the ventilation port. The valve plate of the vent sealing ring, the linear drive device drives the valve plate to press on or leave the vent sealing ring through the guide post.

The leak-free high-temperature air valve of the utility model adopts the structural principle design of the cut-off valve, and uses the valve plate to press the air vent sealing ring to close the air vent, thereby isolating the air inlet and the air outlet to realize the closing of the air valve. The structure of the rotating shaft can therefore overcome the problem of leakage caused by poor sealing at the rotating shaft in the prior art. When the valve plate presses the sealing ring of the vent, the two are tightly combined, which has a good sealing effect and effectively avoids heat loss. In addition, the valve is driven by the linear drive device through the guide post, the structure is not complicated, and the opening and closing process of the air valve is simple.

Preferably, the valve plate is swingably connected to the end of the guide post. When the valve plate presses the vent sealing ring, if the two are not completely parallel, it may not be fully attached, resulting in poor sealing performance. Therefore, swinging the valve plate to the guide post makes the valve plate structurally sound. The adaptive function ensures a tight bond with the vent seal.

Specifically, an accommodating groove with an arc surface is provided on the valve plate, and the leak-free high-temperature air valve further includes a connecting piece, and one end of the connecting piece has a spherical head movably accommodated in the accommodating groove, so the The other end of the connecting piece is fixed on the guide post. The connecting piece fixed with the guide post has a spherical head, and the spherical head is movably accommodated in the accommodating groove on the valve plate. When the spherical head moves relative to the accommodating groove, the valve plate can swing relative to the guide post to adapt to the sealing ring.

More specifically, a ball end cap is fixed on the valve plate, the accommodating groove is opened in the ball end cap, and the connecting piece is fixed to the guide post after passing through the ball end cap, The valve plate is also provided with a groove matching the shape of the spherical head.

Further, the ball end cap is detachably fixed on the valve plate through a screw connection.

Further, the accommodating groove runs through the ball end cap, and the side walls of the accommodating groove close to the openings at both ends are flat surfaces, and the side walls connected between the two ends in the accommodating groove are the same as the side walls of the accommodating groove. The spherical head matches the arc surface.

Preferably, the valve body has an upper chamber and a lower chamber separated by a middle partition, the air inlet is opened on one side of the lower chamber, and the air inlet is opened on one side of the upper chamber. The air outlet is opened on the middle partition plate, the ventilation opening sealing ring is fixed on the middle partition plate, the guide post is slidably arranged on the upper end of the valve body, and the valve plate is connected to the The lower end of the guide post is located above the air vent sealing ring. The air inlet is below the air vent and the movable guide post is above the air vent. When the air inlet is sealed by the valve plate, the air inlet side will be closed, even if the guide post is poorly sealed, the air valve will not be closed A leak has occurred.

Specifically, a shaft sleeve is fixed on the upper end of the valve body, the guide post is slidably passed through the shaft sleeve, a sealing end cover is fixed on the shaft sleeve, and there is a resistance between the sealing end cover and the guide post. High temperature sealing packing. The sealing end cover is sealed on the upper end of the shaft sleeve.

More specifically, the leak-free high-temperature air valve further includes a shaft sleeve sealing ring surrounding the lower end of the guide post, a through hole is formed on the top of the valve body, and the shaft sleeve is moved up to the highest position when the guide post is moved upward. The sealing ring is located in the through hole and pressed against the bottom of the shaft sleeve. The shaft sleeve sealing ring is sealed at the lower end of the shaft sleeve, and cooperates with the sealing end cover to form a double seal, which ensures that the sealing performance of the guide post relative to the shaft sleeve is always good during the sliding process.

Preferably, the inner wall of the valve body is affixed with thermal insulation cotton. The thermal insulation cotton material is attached to the wall of the valve body, which is beneficial to keep the heat energy inside the valve body and reduce the heat energy loss rate.

Description of drawings

FIG. 1 is a schematic structural diagram of a high temperature damper in the prior art.

FIG. 2 is a side view of the inside of the high temperature damper shown in FIG. 1 in perspective.

Fig. 3 is a three-dimensional cross-sectional view of the leak-free high-temperature air valve of the present invention in an open state.

4 is a perspective cross-sectional view of a leak-free high temperature damper in a closed state.

Figure 5 is a cross-sectional view of a leak-free high temperature damper.

FIG. 6 is an enlarged view of A in FIG. 5 .

7 is a cross-sectional view of the ball end cap.

Detailed ways

The preferred embodiments of the present utility model are described below with reference to the accompanying drawings.

As shown in FIG. 3 and FIG. 4 , the present invention provides a leak-free high-temperature air valve, which includes a valve body 1 , a linear drive device 2 , a guide post 3 , a valve plate 4 and a vent sealing ring 5 . The side wall of the valve body 1 is provided with an air inlet 11 and an air outlet 12 leading to the inside of the valve body 1 . The vent seal 5 is fixed in the valve body 1 and surrounds the vent 13 . The guide post 3 is slidably arranged on the valve body 1 , the linear drive device 2 is fixed on the valve body 1 and the output end 21 of the linear drive device 2 is fixed with the guide post 3 , the valve plate 4 is connected to the end of the guide post 3 and is sealed against the ventilation opening Ring 5, the linear drive device 2 drives the valve plate 4 to move through the guide post 3 to press on or leave the vent sealing ring 5. The valve plate 4 is a circular structure corresponding to the vent seal 5 , and the size of the valve plate 4 is larger than the vent seal 5 to ensure that the vent 13 can be completely closed after the valve plate 4 is pressed against the vent seal 5 .

The valve body 1 is a square structure with a horizontal middle partition plate 14 in it. The inner space of the valve body 1 is isolated by the middle partition plate 14 into an upper chamber 15 located above and a lower chamber 16 located below. The above ventilation The port 13 is formed through the middle partition plate 14 . The lower end of one side of the valve body 1 is provided with an air inlet 11 connected to the lower chamber 16, and the upper end of the other side of the valve body 1 is provided with an air outlet 12 connected to the upper chamber 15, so the air inlet 11 is located below, and the air outlet 12 Located at the top, this structural layout facilitates the entry of hot air with a density lower than that of normal temperature air from the air inlet 11 and the dissipation from the air outlet 12 . The vent sealing ring 5 is fixed on the middle partition plate 14 , the guide post 3 is slidably arranged on the upper end of the valve body 1 , and the valve plate 4 is connected to the lower end of the guide post 3 and located above the vent sealing ring 5 .

Specifically, the top wall of the valve body 1 is provided with a through hole 17 for the guide post 3 to pass through. At the same time, the top of the valve body 1 is also fixed with a mounting bracket 18 and a shaft sleeve 6, wherein the position of the shaft sleeve 6 corresponds to the through hole 17 and the shaft sleeve 6 is larger than the through hole 17 , and part of the mounting bracket 18 is suspended above the shaft sleeve 6 . The linear drive device 2 is fixed on the mounting frame 18 , and its output end 21 extends downward and is fixed to the guide post 3 , which slides through the shaft sleeve 6 and extends into the upper chamber 15 . The shaft sleeve 6 plays a guiding role for the guide post 3, so that the guide post 3 is stable in the process of sliding up and down. In this embodiment, the linear driving device 2 is a cylinder, and the piston rod of the cylinder is the output end 21 of the linear driving device 2 .

If the valve plate 4 is directly fixed to the lower end of the guide post 3, the parallelism between the valve plate 4 and the vent sealing ring 5 must be very high to ensure that the valve plate 4 is pressed against the vent seal without any gap after descending. Circle 5 on. If the parallelism between the two is insufficient, the valve plate 4 may partially press the vent sealing ring 5 while the other part is not, resulting in poor sealing and unable to completely close the vent 13 . Therefore, in this solution, a better connection method is adopted to connect the valve plate 4 to the end of the guide column 3 in a swinging manner, so that the valve plate 4 can swing relative to the guide column 3 .

On the basis of FIG. 4 and in combination with FIGS. 5-7 , the leakage-free high-temperature damper also includes a connector 7 and a ball end cover 8 . One end of the connecting piece 7 is provided with an external thread, and the other end is provided with a spherical head 71 . The ball head end cover 8 is provided with an accommodating groove 81 penetrating up and down. The side wall of the accommodating groove 81 close to the openings at both ends is a flat surface 82 , and the side wall of the accommodating groove 81 connected between the two ends is matched with the ball head 71 The arc surface 83. Countersunk holes 85 located on both sides of the accommodating groove 81 are also formed through the ball end cover 8 . A groove 41 that matches the shape of the spherical head 71 and screw holes 42 located on both sides of the groove 41 are also provided on the top surface of the valve plate 4 . When assembling, put the ball head 71 of the connecting piece 7 downward and upward through the ball end cover 8, the ball head 71 is located in the accommodating groove 81, and then put the ball end cover 8 together with the connecting piece 7 on the valve plate 4, so that the The ball head 71 can be supported in the groove 41 and the two countersunk holes 85 on the ball head end cover 8 are aligned with the two screw holes 42 on the valve plate 4 . Then, the bolts are inserted into the countersunk holes 85 and locked into the screw holes 42 , so as to realize the connection and cooperation among the connecting piece 7 , the ball end cover 8 and the valve plate 4 . After that, screw the end of the connector 7 with the external thread into the screw hole (not shown) opened at the end of the guide post 3 , so far, the valve plate 4 is connected to the end of the guide post 3 . Since the ball head 71 and the accommodating groove 81 are in arc-surface fit, the ball head end cover 8 can swing relative to the connecting piece 7 , that is, the valve plate 4 can swing relative to the guide post 3 . With this structure, the parallelism between the valve plate 4 and the vent sealing ring 5 does not need to meet the precise requirements. After the valve plate 4 is pressed down on the vent sealing ring 5, its posture can be adjusted adaptively according to the position of the sealing ring to ensure that The entire air vent sealing ring 5 can be pressed tightly, and the sealing performance is reliable.

The above is only a preferred structure for realizing the swinging of the valve plate 4 relative to the guide post 3. In other embodiments, other structures can also be used to achieve this. For example, when the thickness of the valve plate 4 is sufficient, the valve plate 4 can be directly opened. With an accommodating groove with an arc surface, the spherical head 71 of the connecting piece 7 is directly matched with the valve plate 4 and the ball head end cover 8 is omitted.

3 and 4, the size of the above-mentioned through hole 17 on the top of the valve body 1 is larger than the size of the ball end cover 8. When the guide post 3 drives the valve plate 4 to rise to the highest position, the ball end cover 8 is hidden. in the through hole 17 . Preferably, in order to ensure the sealing of the upper end of the valve body 1 when the valve plate 4 releases the vent 13, a shaft sleeve sealing ring 62 surrounding the guide post 3 is also fixed on the ball end cover 8, and the valve plate 4 reaches the highest level. When in position, the shaft sleeve sealing ring 62 can be pressed under the shaft sleeve 6 , specifically at the gap between the bottom of the shaft sleeve 6 and the top of the valve body 1 , so as to prevent leakage. In addition, a sealing end cover 63 is also fixed on the upper end of the shaft sleeve 6 , and there is a high temperature resistant sealing packing between the sealing end cover 63 and the guide post 3 . Under the double sealing action of the sealing end cover 63 and the shaft sleeve sealing ring 62 , the sealing performance of the upper end of the valve body 1 during the sliding process of the guide post 3 can be ensured.

Above, the valve body 1 is made of 304 stainless steel material, the inside of the valve body 1 can be installed with thermal insulation cotton for heat insulation, and the valve plate 4 is made of 316 high temperature resistant stainless steel material, which can well prevent high temperature corrosion and deformation. The cylinder model of the linear drive device 2 is CA2B100-200 of the Japanese SMC brand (bore diameter 100mm, stroke 200mm), which has good stability and durability. The vent sealing ring 5 and the shaft sleeve sealing ring 62 are both made of high temperature resistant glass fiber that can withstand high temperature, which can withstand temperatures up to 1000°C, effectively ensuring the sealing performance under high temperature. The high temperature resistant sealing packing between the guide posts 3 can also be made of the same material.

The leak-free high-temperature air valve can be installed in the safety bypass of the incinerator. Under normal working conditions without overpressure and overtemperature, the linear drive device 2 exerts a thrust of 392.5kg to press the valve plate 4 on the vent sealing ring 5 At this time, the vent 13 is closed, the interior of the valve body 1 is blocked, the air inlet 11 and the air outlet 12 cannot communicate with each other, and the leak-free high temperature damper is in a closed state. After testing, this air valve can achieve zero leakage when it works for a long time at a high temperature of 300 °C.

When an abnormal over-temperature and over-pressure alarm occurs in the incinerator, the linear drive device 2 drives the guide column 3 to rise and lifts the valve plate 4 from the vent sealing ring 5. At this time, the vent 13 is opened, and the high-temperature and high-pressure hot air flows from the air inlet 11. It enters the valve body 1, passes upward through the vent 13, and then is discharged through the air outlet 12, so as to realize the functions of cooling and depressurizing the incinerator.

The leak-free high-temperature air valve of the present invention adopts the structural principle design of a stop valve, and uses the valve plate 4 to press the air vent sealing ring 5 to close the air vent 13, thereby isolating the air inlet 11 and the air outlet 12 to realize the air valve. Since there is no rotating shaft structure, the problem of leakage caused by poor sealing at the rotating shaft in the prior art can be overcome. When the valve plate 4 presses the air vent sealing ring 5, the two are tightly combined, which has a good sealing effect and effectively avoids heat energy loss. In addition, the valve is driven by the linear drive device 2 through the guide post 3, the structure is not complicated, and the opening and closing process of the air valve is simple.

The above disclosure is only a preferred example of the present invention, and its function is to facilitate the understanding and implementation of the present invention by those skilled in the art. Of course, the scope of rights of the present invention cannot be limited by this. Therefore, a patent application is made according to the present invention. The equivalent changes made by the scope still belong to the scope covered by the present invention.

Claims (10)

1. A leak-free high-temperature air valve, characterized in that it comprises a valve body, a guide post slidably arranged on the valve body and a linear drive device fixed on the valve body, and the valve body is provided with an air inlet, an outlet The air outlet and the air outlet communicated between the air inlet and the air outlet, the valve body is fixed with a air outlet sealing ring surrounding the air outlet, and the end of the guide post is connected with a sealing ring facing the air outlet. The valve plate is driven by the linear drive device to press the valve plate onto or away from the vent sealing ring through the guide post. 2 . The leak-free high temperature damper according to claim 1 , wherein the valve plate is swingably connected to the end of the guide post. 3 . 3. The leakage-free high-temperature air valve according to claim 2, wherein a receiving groove with an arc surface is provided on the valve plate, and the leakage-free high-temperature air valve further comprises a connecting piece, the connecting piece One end of the connecting piece has a spherical head movably accommodated in the accommodating groove, and the other end of the connecting piece is fixed to the guide post. 4. The leak-free high-temperature air valve according to claim 3, wherein a ball end cap is fixed on the valve plate, the accommodating groove is opened in the ball end cap, and the connecting piece passes through the ball end cap. After passing through the ball head end cover, it is fixed with the guide post, and the valve plate is further provided with a groove matching the shape of the ball head. 5 . The leak-free high temperature air valve according to claim 4 , wherein the ball end cap is detachably fixed on the valve plate through a screw connection. 6 . 6 . The leak-free high temperature air valve according to claim 4 , wherein the accommodating groove penetrates through the ball end cap, and the side walls of the accommodating groove near the openings at both ends are flat surfaces, and the accommodating groove is a flat surface. The side wall connected between the two ends in the accommodating groove is an arc surface matched with the spherical head. 7 . The leak-free high temperature air valve according to claim 1 , wherein the valve body has an upper chamber and a lower chamber separated by a middle partition, and one side of the lower chamber is provided with a For the air inlet, one side of the upper chamber is provided with the air outlet, the ventilation port is provided on the middle partition plate, the ventilation opening sealing ring is fixed on the middle partition plate, and the guide post slides It is arranged on the upper end of the valve body, and the valve plate is connected to the lower end of the guide post and located above the air vent sealing ring. 8 . The leak-free high temperature air valve according to claim 7 , wherein a shaft sleeve is fixed on the upper end of the valve body, the guide post is slidably passed through the shaft sleeve, and a shaft sleeve is fixed on the shaft sleeve. 9 . The sealing end cap is provided with a high temperature resistant sealing packing between the sealing end cap and the guide post. 9 . The leak-free high-temperature air valve according to claim 8 , wherein the leak-free high-temperature air valve further comprises a shaft sleeve sealing ring surrounding the lower end of the guide post, and a through hole is provided at the top of the valve body. 10 . , when the guide post moves up to the highest position, the shaft sleeve sealing ring is located in the through hole and pressed against the bottom of the shaft sleeve. 10 . The leak-free high temperature air valve according to claim 1 , wherein the inner wall of the valve body is affixed with thermal insulation cotton. 11 .

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