CN217234414U

CN217234414U - Metal sealing high temperature resistant RTO poppet valve

Info

Publication number: CN217234414U
Application number: CN202220990262.7U
Authority: CN
Inventors: 董殿波
Original assignee: Zhongke Bida Energy Saving And Environmental Protection Technology Chengdu Co Ltd
Current assignee: Zhongke Bida Energy Saving And Environmental Protection Technology Chengdu Co Ltd
Priority date: 2022-04-27
Filing date: 2022-04-27
Publication date: 2022-08-19
Anticipated expiration: 2032-04-27

Abstract

The utility model discloses a metal sealing high temperature resistant RTO poppet valve, which comprises a fixed seat, a cylinder, a valve plate and a valve body base, wherein the cylinder is arranged at the top of the fixed seat, and a telescopic rod of the cylinder extends into the fixed seat; a sliding rod group is arranged in the fixed seat, one end of the sliding rod group is connected with the cylinder telescopic rod through a shaft connector, and the valve plate is fixedly arranged on the sliding rod group; the valve plate bottom plate is provided with a circle of metal gasket at the upper edge, the top edge of the valve body base is provided with a circle of coaming, and when the lifting valve is closed, the metal gasket is in close contact with the top end face of the coaming. The metal gasket is used as a sealing element and is deformed to a certain extent after being extruded, so that the metal gasket is combined with the contact surface of the coaming more tightly, the purpose of zero leakage is achieved, the end surface of the coaming is turned into an arc shape, and an indentation is formed when the metal gasket is contacted with the coaming, so that the sealing effect is enhanced; the sliding rod group is arranged in a segmented mode, one segment of the sliding rod group is connected through a shaft connecting union, and the shaft connecting union can automatically correct stress centrality and offset installation errors.

Description

Metal sealing high temperature resistant RTO poppet valve

Technical Field

The utility model relates to a RTO exhaust-gas treatment technical field, concretely relates to metal-sealed high temperature resistant type RTO poppet valve.

Background

The purification treatment of industrial waste gas containing volatile organic compounds is a hotspot for air pollution treatment. Regenerative thermal incineration (RTO) is a typical method for purifying industrial organic waste gas, and is suitable for treating industrial organic waste gas with medium and high concentration. In regenerative thermal incinerators, an exhaust gas switching valve is one of the most important structures. The quality of the waste gas control valve directly influences the working quality of the whole RTO process. The small exhaust gas leakage greatly reduces the efficiency of exhaust gas treatment. Currently, poppet valves have gradually become the mainstream design of vent control valves in the RTO industry.

Most of the existing common poppet valves are soft seals or steel plates and valve bodies are in direct contact seal. There are the following disadvantages: 1. the soft seal is easy to age and is greatly influenced by temperature. The common soft seal is difficult to bear at the temperature of more than 300 ℃; 2. the metal direct contact type seal has high requirement on the processing precision of the contact surface, and the leakage can be effectively reduced only by achieving very high contact ratio. 3. The connection of valve actuating lever is mostly lug connection, and the hard-coupling meets the high requirement for centrality, and it is serious that there is eccentricity to cause wearing and tearing a little, and axle and cylinder sealing member damage easily, influence normal use.

SUMMERY OF THE UTILITY MODEL

The utility model discloses just not enough to prior art exists provides a metal-sealed high temperature resistant type RTO poppet valve.

The utility model provides a metal seal high temperature resistant type RTO poppet valve, includes fixing base, cylinder, valve plate, valve body base, the cylinder is installed in the fixing base top, and its telescopic link stretches into in the fixing base. The sliding rod set is arranged in the fixing seat, one end of the sliding rod set is connected with the air cylinder telescopic rod through a shaft connector, and the valve plate is fixedly installed on the sliding rod set. The valve plate is characterized in that a circle of metal gasket is arranged at the upper edge of the valve plate bottom plate, a circle of coaming is arranged at the edge of the top of the valve body base, and when the lifting valve is closed, the metal gasket is in close contact with the end face of the top of the coaming.

Furthermore, the sliding rod group comprises an extension rod connected with the cylinder telescopic rod through a shaft connector, and the other end of the extension rod is connected with the sliding rod through a shaft connecting movable connector.

Further, the valve plate is fixedly connected to the sliding rod.

Furthermore, the center of the bottom of the fixing seat is provided with a first sliding bearing sleeve, and the sliding rod is inserted in the first sliding bearing sleeve in a sliding manner.

Further, the metal gasket is fixed on the valve plate through a gasket compression ring.

Furthermore, a gasket positioning ring is arranged on the valve plate bottom plate on the inner side of the metal gasket.

Further, the metal gasket is a multilayer composite metal gasket.

Further, install the support in the valve body base, install slide bearing sleeve two on the support, the slide bar slides and pegs graft in slide bearing sleeve two.

Furthermore, the top end face of the enclosing plate is arc-shaped.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model has simple structure and reasonable design, adopts the metal gasket as a sealing element, can generate certain deformation after being extruded, leads the contact surface of the metal gasket to be combined with the bounding wall more tightly, achieves the purpose of zero leakage, turns the end surface of the bounding wall into an arc shape, forms an indentation when the metal gasket is contacted with the bounding wall, and enhances the sealing effect; the sliding rod group is arranged in a segmented mode, and one segment of the sliding rod group is connected by the shaft connecting movable connector, so that the shaft connecting movable connector has the advantages that the stress centrality can be automatically corrected, and installation errors are offset; through the setting of sliding bearing cover one and sliding bearing cover two, can rectify the straightness that hangs down of slide bar.

Drawings

FIG. 1 is a schematic illustration of an RTO poppet valve open state;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIG. 3 is a schematic illustration of an RTO poppet valve closed state;

FIG. 4 is an enlarged schematic view of FIG. 3 at B;

fig. 5 is an enlarged schematic view at C in fig. 1.

In the figure: the valve comprises a fixed seat 1, a sliding bearing sleeve I11, a cylinder 2, a sliding rod group 3, an extension rod 31, a sliding rod 32, a shaft connector 33, a shaft connector 34, a valve plate 4, a metal gasket 41, a gasket pressing ring 411, a gasket positioning ring 42, a valve body base 5, a coaming 51, a support 52 and a sliding bearing sleeve II 53.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, a metal-sealed high temperature resistant type RTO poppet valve, includes fixing base 1, cylinder 2, valve plate 4, valve body base 5, cylinder 2 installs in fixing base 1 top, and its telescopic link stretches into in the fixing base 1.

The improved air cylinder is characterized in that a sliding rod group 3 is arranged in the fixing seat 1, one end of the sliding rod group 3 is connected with a telescopic rod of the air cylinder 2 through a shaft connector 33, and the valve plate 4 is fixedly installed on the sliding rod group 3. The sliding rod group 3 comprises an extension rod 31 connected with the telescopic rod of the cylinder 2 by a shaft connector 33, and the other end of the extension rod 31 is connected with a sliding rod 32 by a shaft connector 34. The valve plate 4 is fixedly connected to the sliding rod 32. The sliding rod group 3 is arranged in a segmented mode, one segment of the sliding rod group is connected through the shaft connecting union 34, and the sliding rod group has the advantages that the shaft connecting union 34 can automatically correct stress centrality and offset installation errors. The heat insulation pad can be added in the shaft connector 34, or the hollow design of the cavity is adopted, so that the heat insulation pad and the surrounding environment can be ventilated and radiated, the temperature conduction can be effectively reduced, the telescopic rod of the cylinder 2 can be kept at normal temperature, and the sealing ring of the cylinder 2 is protected, so that the sealing ring is not influenced by the temperature of the valve end.

And a circle of metal gasket 41 is arranged at the upper edge of the bottom plate of the valve plate 4. The metal gasket 41 is fixed on the valve plate 4 through a gasket pressing ring 411, and a gasket positioning ring 42 is arranged on the bottom plate of the valve plate 4 on the inner side of the metal gasket 41. The metal gasket 41 is a multilayer composite metal gasket, and the thickness of a single metal gasket is controlled to be 0.5-1.0 mm. The material can be made of various materials, such as: carbon steel, stainless steel, aluminum sheets, copper sheets, alloy sheets and the like.

A circle of enclosing plate 51 is arranged at the edge of the top of the valve body base 5, and the top end face of the enclosing plate 51 is arc-shaped. When the poppet valve is closed, the metal gasket 41 is in close contact with the top end face of the shroud 51. The top end face of the enclosing plate 51 is designed in an arc shape, and an indentation is formed when the metal gasket 41 contacts with the enclosing plate 51, so that the sealing effect is enhanced. The metal gasket 41 is fixedly arranged on the valve plate 4, corresponds to the enclosing plate 51 on the valve body base 5, and has a width larger than the end face of the enclosing plate 51. The metal gasket 41 mainly functions to offset errors in lathe machining of the valve plate 4 and the shroud 5.

The center department in 1 bottom of fixing base installs slide bearing sleeve 11, and the slide bar 32 slides and pegs graft in slide bearing sleeve 11. A support 52 is installed in the valve body base 5, a sliding bearing sleeve II 53 is installed on the support 52, and the sliding rod 32 is inserted in the sliding bearing sleeve II 53 in a sliding manner. The support 52 may be vented to improve airflow and reduce ventilation assistance.

When the valve is used, when the lifting valve needs to be closed, the cylinder 2 is started, the telescopic rod of the cylinder 2 extends out to drive the sliding rod group 3 and the valve plate 4 to move downwards, the valve plate 4 covers the enclosing plate 51, and the bottom surface of the metal gasket 41 is in close contact with the upper end surface of the enclosing plate 51 to realize closing. The utility model discloses simple structure, reasonable in design adopts metal gasket 41 as the sealing member, can produce certain deformation after being extruded, makes its contact surface with bounding wall 51 combine more closely, reaches the purpose of zero leakage, and the facing of bounding wall 51 is the arc, forms the indentation when metal gasket 41 contacts with bounding wall 51, strengthens sealed effect; the sliding rod group 3 is arranged in a subsection mode, and one section of the sliding rod group is connected through the shaft connecting movable connector 34, so that the shaft connecting movable connector 34 can automatically correct stress centrality and offset installation errors; the perpendicularity of the slide rod 32 can be corrected by the arrangement of the sliding bearing sleeve I11 and the sliding bearing sleeve II 53.

Claims

1. A metal sealing high-temperature-resistant RTO lift valve comprises a fixed seat (1), a cylinder (2), a valve plate (4) and a valve body base (5), wherein the cylinder (2) is installed at the top of the fixed seat (1), and a telescopic rod of the cylinder extends into the fixed seat (1); the method is characterized in that: a sliding rod group (3) is arranged in the fixed seat (1), one end of the sliding rod group (3) is connected with a telescopic rod of the cylinder (2) by a shaft connector (33), and the valve plate (4) is fixedly arranged on the sliding rod group (3); the improved poppet valve is characterized in that a circle of metal gasket (41) is arranged at the upper edge of the bottom plate of the valve plate (4), a circle of coaming (51) is arranged at the top edge of the valve body base (5), and when the poppet valve is closed, the metal gasket (41) is in close contact with the top end face of the coaming (51).

2. A metal-sealing, high temperature resistant RTO poppet valve as claimed in claim 1, wherein: the sliding rod group (3) comprises an extension rod (31) which is connected with the telescopic rod of the cylinder (2) through a shaft connector (33), and the other end of the extension rod (31) is connected with a sliding rod (32) through a shaft connector (34).

3. A metal-sealing, high temperature resistant RTO poppet valve as claimed in claim 1, wherein: the valve plate (4) is fixedly connected to the sliding rod (32).

4. A metal-sealed, high temperature resistant RTO poppet valve as claimed in claim 1, wherein: a sliding bearing sleeve I (11) is installed at the center of the bottom of the fixing seat (1), and the sliding rod (32) is inserted into the sliding bearing sleeve I (11) in a sliding mode.

5. A metal-sealing, high temperature resistant RTO poppet valve as claimed in claim 1, wherein: the metal gasket (41) is fixed on the valve plate (4) through a gasket pressing ring (411).

6. A metal-sealing, high temperature resistant RTO poppet valve as claimed in claim 1, wherein: and a gasket positioning ring (42) is arranged on the bottom plate of the valve plate (4) on the inner side of the metal gasket (41).

7. A metal-sealed, high temperature resistant RTO poppet valve as claimed in claim 1, wherein: the metal gasket (41) is a multilayer composite metal gasket.

8. A metal-sealing, high temperature resistant RTO poppet valve as claimed in claim 1, wherein: a support (52) is installed in the valve body base (5), a sliding bearing sleeve II (53) is installed on the support (52), and the sliding rod (32) is inserted into the sliding bearing sleeve II (53) in a sliding mode.

9. A metal-sealed, high temperature resistant RTO poppet valve as claimed in claim 1, wherein: the top end face of the coaming (51) is arc-shaped.