CN216306754U

CN216306754U - Double-layer metal elastic sealing type lift valve for waste gas treatment system

Info

Publication number: CN216306754U
Application number: CN202122962813.7U
Authority: CN
Inventors: 刘继成; 童欢; 宋永�
Original assignee: Wuxi Shuangyu Environmental Protection Technology Co ltd
Current assignee: Wuxi Shuangyu Environmental Protection Technology Co ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-04-15
Anticipated expiration: 2031-11-29

Abstract

The utility model discloses a double-layer metal elastic sealing type lifting valve for a waste gas treatment system, which comprises a valve body, a valve plate and a valve shaft, wherein two ends of the valve shaft are respectively connected with the valve plate and a driving device, the edge of the inner side of an air vent of the valve body is provided with a valve plate sealing seat, the valve plate sealing seat is provided with a first bearing platform and a second bearing platform which are step-shaped annular, two sides of the valve plate are respectively provided with a small metal annular sealing sheet and a large metal annular sealing sheet, the outer diameter of the large metal annular sealing sheet is larger than that of the small metal annular sealing sheet, the valve shaft penetrates through the valve body and is provided with the valve shaft sealing seat, an air ring with an air hole is arranged between the valve shaft sealing seat and the valve shaft, the valve shaft sealing seat is provided with a purging pipe, and the purging pipe is connected with high-pressure gas. The sealing piece is made of metal, the deformation possibility is low, the waste gas is prevented from leaking from the gap of the joint by the pressure difference between the high-pressure gas and the waste gas in the valve body, and the sealing performance is improved.

Description

Double-layer metal elastic sealing type lift valve for waste gas treatment system

Technical Field

The utility model relates to the field of waste gas treatment equipment, in particular to a double-layer metal elastic sealing type lift valve for a waste gas treatment system.

Background

Along with the development of industry progress, industrial waste gas emission standard is also more and more strict, in RTO (regenerative thermal oxidizer) formula exhaust treatment system, regenerative thermal oxidizer formula is as an organic waste gas treatment technology that exhaust treatment effect is high-efficient, the operation is stable, technology technique is mature, use novel honeycomb ceramic heat accumulation material and advanced heat exchange technology, the heat that produces when efficient heat exchange system effectively retrieves waste gas oxidative decomposition, the rate of heat recovery is higher than 95%, VOCs purifying effect can reach 99%, has outstanding technological advantage in the aspect of organic waste gas purification.

Generally, several regenerators need to be switched with each other, and when the regenerators are switched, corresponding combustion chambers need to be closed and opened, and a poppet valve is one of essential main devices of the RTO system.

Poppet valves in prior art devices have some drawbacks: firstly, the sealing performance of the poppet valves is important, the sealing performance of some poppet valves is improved at the sealing position through elastic sealing rings, the elastic sealing rings are made of rubber materials, the poppet valves are easy to age after being subjected to high-temperature environment for a long time, and the sealing performance of the poppet valves is increasingly poor along with the lapse of the service time; secondly, the valve shaft penetrates through the valve body to be connected with the driving part, a gap exists at the joint of the valve shaft and the valve body, and waste gas in the valve body is easy to leak out from the gap.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides the double-layer metal elastic sealing type lift valve for the waste gas treatment system, which has the advantages of good sealing performance, firm structure, convenient maintenance and long service life.

According to one aspect of the utility model, a double-layer metal elastic sealing type lift valve for an exhaust gas treatment system is provided, which comprises a valve body, a valve plate and a valve shaft, wherein a vent hole is arranged at the top of the valve body, an incinerator flange connector is arranged on the upper side of the vent hole, a valve port is arranged on the side wall of the valve body, a valve port flange connector is arranged on the outer side of the valve port, the valve plate is arranged on the valve body and connected to one end of the valve shaft, a driving device is connected to the other end of the valve shaft, a valve plate sealing seat is arranged on the inner side edge of the vent hole, the valve plate sealing seat is provided with a first annular bearing platform and a second annular bearing platform, the first bearing platform is lower than the second bearing platform, the first bearing platform and the second bearing platform form a step-shaped structure, an annular small sealing sheet and an annular large sealing sheet are respectively arranged on the upper side and the lower side of the valve plate, the outer diameter of the annular large sealing sheet is larger than that of the annular small sealing sheet, and the annular sealing sheet are made of metal, when the vent hole is closed, the large annular sealing piece is abutted against the first bearing platform, and the small annular sealing piece is abutted against the second bearing platform. Therefore, the flange interface of the incinerator is externally connected with incinerator equipment, the driving device drives the valve shaft to drive the valve plate to move up and down, the opening and the closing of the vent hole are realized, when the vent hole is closed, the large annular sealing sheet is tightly attached to the first bearing platform to form a first seal, most of gas can be sealed by the first seal, the small annular sealing sheet is tightly attached to the second bearing platform to form a second seal, the gas leaked from the first seal can be sealed for the second time, and the sealing effect of the two sealing sheets can ensure the sealing effect of the whole poppet valve; the driving device drives the valve plate to be in rigid driving, and the error of two seals can be made up through the two seals, so that elastic sealing is realized.

In some embodiments, the valve shaft is provided with a valve shaft sealing seat at the position where the valve shaft penetrates out of the valve body, the valve shaft is sleeved with the valve shaft sealing seat, a wind ring is arranged between the valve shaft sealing seat and the valve shaft, the wind ring is provided with a gas hole, the valve shaft sealing seat is provided with a purging pipe, a gas outlet of the purging pipe is aligned to the gas hole, the purging pipe is connected with high-pressure gas, and an end cover is arranged at the bottom of the valve shaft sealing seat. Therefore, the waste gas in the valve body is prevented from leaking out through a small gap between the valve shaft and the valve shaft sealing seat through the pressure difference between the clean high-pressure gas and the waste gas in the valve body all the time, and the sealing performance is improved.

In some embodiments, the driving device is an air cylinder, the valve body is provided with a mounting seat, a cylinder body of the air cylinder is fixed on the mounting seat, a piston rod of the air cylinder is connected with the valve shaft, the top of the mounting seat is provided with a guide sleeve, the guide sleeve is sleeved outside the valve shaft, and a tetrafluoro shaft ring is arranged between the guide sleeve and the valve shaft. Therefore, the polytetrafluoroethylene shaft ring is arranged in the guide sleeve, so that the guide is accurate and wear-resistant, and the service life of the part is prolonged.

In some embodiments, the valve body is internally divided into a left chamber and a right chamber by a partition plate, the left chamber and the right chamber are respectively provided with an air vent and a valve port, the air vent is respectively and independently provided with a valve plate, and the left chamber and the right chamber are respectively provided with a point detection door. Therefore, one valve body can be divided into two poppet valves through the partition plate, and the left chamber and the right chamber can be overhauled through the inspection point doors on the two sides.

In some embodiments, criss-cross internal ribs are provided within the incinerator flange interface. From this, opening and closing of valve plate control air vent, the edge of air vent can be supported by the valve plate and press, sets up vertically and horizontally staggered's inside strengthening rib in burning furnace flange interface, is favorable to improving the intensity at air vent edge, prolongs the life of equipment, also can separate gas simultaneously.

In some embodiments, the thickness of the large annular seal piece is 1.5mm and the thickness of the small annular seal piece is 1 mm. From this, the thickness difference of the big gasket of annular and the little gasket of annular can guarantee that the little gasket of annular can not disturb the sealed effect of the big gasket of annular, adopts soft after hard technology thought earlier, makes the sealed process of compressing tightly between little gasket of annular and second bearing platform, the big gasket of annular and the first bearing platform step by step.

The utility model has the advantages that: the utility model is scientific and reasonable, the flange interface of the incinerator is externally connected with incinerator equipment, the inner side edge of the vent hole is provided with a step-shaped valve plate sealing seat, after the cylinder extends out, the large annular sealing sheet at the edge of the valve plate is tightly attached to the first bearing platform of the valve plate sealing seat to form a first seal, the first seal can seal most of gas, the small annular sealing sheet at the edge of the valve plate is tightly attached to the second bearing platform of the valve plate sealing seat to form a second seal, the gas leaked from the first seal can be sealed for the second time, the closing of the vent hole is realized, the sealing effect of the whole poppet valve can be ensured through the sealing action of the two sealing sheets, and the large annular sealing sheet and the small annular sealing sheet are made of metal materials, the possibility of deformation caused by environmental factors is small, and the sealing effect cannot be influenced with the long-term use of the poppet valve;

clean high-pressure gas is introduced into the valve shaft sealing seat, and the waste gas in the valve body is prevented from leaking out through a small gap between the valve shaft and the valve shaft sealing seat through the pressure difference existing between the high-pressure gas and the waste gas in the valve body all the time, so that the sealing performance is improved.

Drawings

FIG. 1 is a schematic structural view of one embodiment of a dual layer metal poppet valve of the present invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is an enlarged view of portion A of FIG. 1;

FIG. 5 is a schematic view of the connection structure of the valve shaft, the bottom plate and the valve shaft seal holder.

Detailed Description

The present invention will be further described with reference to the following embodiments.

As shown in fig. 1 and 4, the double-layer metal elastic sealing type poppet valve for an exhaust gas treatment system according to the embodiment of the present invention includes a valve body 1, a valve plate 2, and a valve shaft 3. The top of the valve body 1 is provided with a vent hole 11, the upper side of the vent hole 11 is fixedly welded with an incinerator flange interface 4, and the incinerator flange interface 4 is used for externally connecting incinerator equipment (not shown). The side wall of the valve body 1 is provided with a valve port 12, the outer side of the valve port 12 is welded and fixed with a valve port flange interface 5, and the valve port flange interface 5 is used for connecting a pipeline (not shown) for conveying waste gas. The valve plate 2 is arranged in the valve body 1, the valve plate 2 is connected to one end of the valve shaft 3, the other end of the valve shaft 3 penetrates out of the bottom of the valve body 1 to be connected with a driving device, and the valve plate 2 is controlled to lift through the driving device to open or close the vent hole 11. Exhaust gas enters the poppet valve from the valve port 12 and enters the incinerator apparatus from the vent hole 11 when the vent hole 11 is opened. The valve plate sealing seat 6 is fixed on the inner side edge of the vent hole 11 in a full welding mode so as to ensure the tightness of the joint. The valve plate sealing seat 6 is provided with a first annular bearing platform 61 and a second annular bearing platform 62, wherein the first bearing platform 61 is lower than the second bearing platform 62, so that the first bearing platform 61 and the second bearing platform 62 form a step-shaped structure. The upper side and the lower side of the valve plate 2 are respectively provided with a small annular sealing piece 22 and a large annular sealing piece 21, the small annular sealing piece 22 and the large annular sealing piece 21 are fixedly arranged on the valve plate 2 through a pressing plate 23 and screws, and the screws are sealed through a sealant 24. The external diameter of the big sealing piece 21 of annular is greater than the external diameter of the little sealing piece 22 of annular, and big sealing piece 21 of annular and the little sealing piece 22 of annular are the metal material, and when the air vent 11 was closed, big sealing piece 21 of annular contradicts with first cushion cap 61, little sealing piece 22 of annular contradicts with second cushion cap 62.

The thickness of the annular large sealing piece 21 is 1.5mm, and the thickness of the annular small sealing piece 22 is 1 mm. The thickness of the large annular sealing piece 21 is different from that of the small annular sealing piece 22, so that the small annular sealing piece 22 can not interfere with the sealing effect of the large annular sealing piece 21.

The driving device drives the valve shaft 3 to drive the valve plate 2 to move up and down, so that the vent hole 11 is opened and closed. When the vent hole 11 is closed, the large annular sealing sheet 21 is tightly attached to the first supporting platform 61 to form a first seal, and the first seal can seal most of gas; the small annular sealing piece 22 is tightly attached to the second bearing platform 62 to form a second seal, so that the gas leaked from the first seal can be sealed for the second time, and the sealing effect of the two sealing pieces can ensure the sealing effect of the whole poppet valve. The driving device drives the valve plate 2 to be in rigid driving, the process concept of firstly softening and then hardening is adopted, the compressing and sealing processes between the small annular sealing piece 22 and the second bearing platform 62 and between the large annular sealing piece 21 and the first bearing platform 61 are gradual, the two sealing errors can be compensated through the two sealing, and elastic sealing is realized.

As shown in fig. 1 and 2, the driving means employs a cylinder 8. The bottom of the valve body 1 is provided with an opening 14, a bottom plate 15 is mounted at the opening 14 through a screw, the mounting seat 80 is fixed on the bottom plate 15, a cylinder body 82 of the cylinder 8 is fixed on the mounting seat 80, and a piston rod 81 of the cylinder 8 is connected with the valve shaft 3 through a coupling 85. The top center of mount pad 80 installs uide bushing 83 through the screw, and outside the valve shaft 3 was located to the uide bushing 83 cover, install tetrafluoro collar 84 between uide bushing 83 and the valve shaft 3. The piston rod 81 of the cylinder 8 telescopically drives the valve shaft 3 to move up and down in the guide sleeve 83, and the tetrafluoro shaft ring 84 is arranged in the guide sleeve 83, so that accurate guide and wear resistance can be ensured, and the service life of the component can be prolonged.

As shown in fig. 1 and 5, the valve shaft 3 penetrates through the bottom plate 15 at the bottom of the valve body 1, the valve shaft seal seat 7 is installed at the joint of the valve shaft 3 and the bottom plate 15, the valve shaft seal seat 7 is sleeved outside the valve shaft 3, the air ring 71 is installed between the valve shaft seal seat 7 and the valve shaft 3, the air ring 71 is sleeved outside the valve shaft 3, the air ring 71 is provided with an air hole 711, the valve shaft seal seat 7 is provided with a purging pipe 72, the air outlet of the purging pipe 72 is aligned with the height of the air hole 711, the purging pipe 72 is externally connected with high-pressure gas, and the bottom of the valve shaft seal seat 7 is provided with an end cover 73. Therefore, the pressure difference between the clean high-pressure gas and the exhaust gas in the valve body 1 is always present, so that the exhaust gas in the valve body 1 is prevented from leaking out through a slight gap between the valve shaft 3 and the valve shaft seal holder 7, and the sealing performance is further improved.

As shown in fig. 1 and 3, criss-cross internal reinforcing ribs 41 are provided in the incinerator flange interface 4. The valve plate 2 controls the opening and closing of the vent hole 11, the edge of the vent hole 11 can be pressed by the valve plate 2, and the criss-cross internal reinforcing ribs 41 are arranged in the flange interface 4 of the incinerator, so that the strength of the edge of the vent hole 11 is improved, the service life of equipment is prolonged, and meanwhile, gas can be separated.

In this embodiment, a left chamber 101 and a right chamber 102 are separated from the valve body 1 by a partition 100, the left chamber 101 and the right chamber 102 are respectively provided with a vent hole 11 and a valve port 12, the vent hole 11 is provided with an independent valve plate 2, and the left chamber 101 and the right chamber 102 are provided with a check point door 13. One valve body 1 can be divided into two poppet valves by a partition 100, and the left and right chambers 102 can be inspected through inspection doors 13 on both sides. The lift valves are generally in a group of two sets, are arranged according to the positions of construction sites, are different in installation quantity and are generally in three groups and six sets. Incinerator flange interface 4 connects externally incinerator equipment, and industrial waste gas gets into from the valve port 12 at valve body 1 both ends, when needing to switch over each other, needs corresponding bin to close or open, and industrial waste gas gets into incinerator equipment from the blow vent of poppet valve, carries out the process treatment of next step.

In this embodiment, the valve body 1 is formed by rolling and bending a steel plate or welding a steel plate made of carbon steel or stainless steel (such as SUS304 or 2205 duplex stainless steel or 2507 super stainless steel, the material of which depends on the composition, concentration and corrosiveness of industrial waste gas). The material selection of the valve plate 2 and the valve shaft 3 depends on the composition, concentration and corrosiveness of the industrial waste gas.

The utility model is scientific and reasonable, the inner side edge of the vent hole 11 is provided with a step-shaped valve plate sealing seat 6, after the cylinder 8 extends out, the large annular sealing sheet 21 at the edge of the valve plate 2 is tightly attached to the first bearing platform 61 of the valve plate sealing seat 6 to form a first seal, the first seal can seal most of gas, the small annular sealing sheet 22 at the edge of the valve plate 2 is tightly attached to the second bearing platform 62 of the valve plate sealing seat 6 to form a second seal, the gas leaked from the first seal can be sealed for the second time, the closure of the vent hole 11 is realized, and the sealing effect of the whole poppet valve can be ensured through the sealing effect of the two sealing sheets. And the annular big sealing piece 21 and the annular small sealing piece 22 are made of metal materials, so that the possibility of deformation caused by environmental factors is low, and the sealing effect cannot be influenced along with the long-term use of the poppet valve. Clean high-pressure gas is connected to the valve shaft sealing seat 7, and the waste gas in the valve body 1 is prevented from leaking out through a small gap between the valve shaft 3 and the valve shaft sealing seat 7 through the pressure difference existing between the high-pressure gas and the waste gas in the valve body 1 all the time, so that the sealing performance is improved. Through the detachable bottom plate 15 at the bottom of the valve body 1, the valve shaft 3, the cylinder 8, the valve shaft seal seat 7 and other parts can be detached independently, and subsequent maintenance and part replacement are facilitated.

The foregoing describes only some embodiments of the present invention and modifications and variations thereof will be apparent to those skilled in the art without departing from the spirit and scope of the utility model.

Claims

1. The double-layer metal elastic sealing type lift valve for the waste gas treatment system comprises a valve body (1), a valve plate (2) and a valve shaft (3), wherein a vent hole (11) is formed in the top of the valve body (1), an incinerator flange connector (4) is arranged on the upper side of the vent hole (11), a valve port (12) is arranged on the side wall of the valve body (1), a valve port flange connector (5) is arranged on the outer side of the valve port (12), the valve plate (2) is arranged in the valve body (1) and connected to one end of the valve shaft (3), the other end of the valve shaft (3) penetrates through the valve body (1) and is connected with a driving device, the double-layer metal elastic sealing type lift valve is characterized in that a valve plate sealing seat (6) is arranged on the inner side edge of the vent hole (11), the valve plate sealing seat (6) is provided with a first annular bearing platform (61) and a second annular bearing platform (62), and the first bearing platform (61) is lower than the second bearing platform (62), Make first bearing platform (61) and second bearing platform (62) form step-like structure, the upper and lower side of valve plate (2) is equipped with little gasket (22) of annular and the big gasket (21) of annular respectively, the external diameter of the big gasket (21) of annular is greater than the external diameter of the little gasket (22) of annular, the big gasket (21) of annular and the little gasket (22) of annular are the metal material, when air vent (11) were closed, big gasket (21) of annular contradicts with first bearing platform (61), the little gasket (22) of annular contradicts with second bearing platform (62).

2. The double-layer metal elastic sealing type poppet valve for the exhaust gas treatment system according to claim 1, wherein a valve shaft sealing seat (7) is arranged at a position where the valve shaft (3) penetrates through the valve body (1), the valve shaft sealing seat (7) is sleeved outside the valve shaft (3), an air ring (71) is arranged between the valve shaft sealing seat (7) and the valve shaft (3), the air ring (71) is provided with an air hole (711), a purging pipe (72) is installed on the valve shaft sealing seat (7), an air outlet of the purging pipe (72) is aligned with the air hole (711), the purging pipe (72) is connected with high-pressure gas, and an end cover (73) is arranged at the bottom of the valve shaft sealing seat (7).

3. The poppet valve with the double-layer metal elastic sealing type for the exhaust gas treatment system according to claim 1 or 2, wherein the driving device is an air cylinder (8), the valve body (1) is provided with a mounting seat (80), a cylinder body (82) of the air cylinder (8) is fixed on the mounting seat (80), a piston rod (81) of the air cylinder (8) is connected with the valve shaft (3), a guide sleeve (83) is arranged at the top of the mounting seat (80), the guide sleeve (83) is sleeved outside the valve shaft (3), and a tetrafluoro shaft ring (84) is arranged between the guide sleeve (83) and the valve shaft (3).

4. The double-layer metal elastic sealing type poppet valve for the exhaust gas treatment system according to claim 3, wherein the valve body (1) is internally divided into a left chamber (101) and a right chamber (102) by a partition plate (100), the left chamber (101) and the right chamber (102) are respectively provided with a vent hole (11) and a valve port (12), the vent hole (11) is respectively and independently provided with the valve plate (2), and the left chamber (101) and the right chamber (102) are respectively provided with a check point door (13).

5. The double-layer metal elastic sealing type poppet valve for the exhaust gas treatment system according to claim 1, wherein the incinerator flange interface (4) is internally provided with criss-cross internal reinforcing ribs (41).

6. The poppet valve with a double metal elastic seal for an exhaust gas treatment system according to claim 1, wherein the thickness of the large annular sealing piece (21) is 1.5mm, and the thickness of the small annular sealing piece (22) is 1 mm.