CN220816578U

CN220816578U - RTO poppet valve

Info

Publication number: CN220816578U
Application number: CN202322430686.5U
Authority: CN
Inventors: 侯红强; 胡振宇; 杜欣
Original assignee: Beijing Tranhold Environmental Technology Co ltd
Current assignee: Beijing Tranhold Environmental Technology Co ltd
Priority date: 2023-09-07
Filing date: 2023-09-07
Publication date: 2024-04-19
Anticipated expiration: 2033-09-07

Abstract

The utility model discloses an RTO lift valve, which adopts a pneumatic flat push structure and comprises a cylinder and a valve shaft connected with the cylinder, wherein the valve shaft is provided with a valve plate, the valve plate is matched with a valve seat, a valve seat air seal conveying pipeline consisting of a valve seat air seal pipe, an electromagnetic valve and a valve seat air seal valve is arranged below the valve plate, the valve seat air seal valve is connected with clean compressed gas outside, the flow and the on-off of the clean compressed gas passing through the valve seat air seal pipe are controlled through the electromagnetic valve and the valve seat air seal valve, the cylinder drives the valve shaft to extend to the outer side of a rear bearing group, the lift valve also comprises a front sealing assembly, the front sealing assembly is fixed on one side close to the cylinder through bolts, and the cylinder, the front sealing assembly, the valve shaft and the valve seat are coaxially installed.

Description

RTO poppet valve

Technical Field

The utility model belongs to the technical field of waste gas treatment, and particularly relates to an RTO lifting valve.

Background

Volatile organic compounds (Volatile Organic Compounds, VOCs) are main precursors formed by fine particulate matters (PM 2.5) and ozone in the atmosphere, and comprise volatile organic matters such as formaldehyde, benzene series, hydrocarbon compounds and the like, so that certain potential hazard is caused to the atmosphere environment and human health, and the volatile organic compounds are important points of the atmospheric pollution control work. The key point of comprehensive treatment of volatile organic compounds is to improve the purification efficiency of treatment facilities. At present, the main technology for treating VOCs at home and abroad is a regenerative thermal incineration (RTO) technology. Because RTO poppet valve quantity is many, switch frequently, operational environment is abominable, often takes place the poppet valve leakage phenomenon, and common poppet valve leakage causes have valve plate seal not tight, packing seal inefficacy, bearing damage, valve plate rotate change sealing position etc. these all can cause the RTO system to stop or can not steady operation, reduce RTO purification efficiency, influence RTO system emission up to standard, even have the potential safety hazard.

In view of the above factors, an RTO poppet valve is specifically designed, and a multiple sealing structure is adopted to optimize the sealing performance of the poppet valve, reduce the leakage of waste gas and improve the RTO purification efficiency.

Disclosure of utility model

The present utility model is directed to an RTO poppet valve that solves the problems set forth in the background art.

The utility model aims at realizing the following technical scheme: an RTO lift valve adopts a pneumatic flat-pushing structure and comprises a cylinder and a valve shaft connected with the cylinder, wherein the valve shaft is provided with a valve plate which is matched with a valve seat, a valve seat air seal conveying pipeline consisting of a valve seat air seal pipe, an electromagnetic valve and a valve seat air seal valve is arranged below the valve plate, the valve seat air seal valve is connected with clean compressed gas outside, and the flow and the on-off of the clean compressed gas passing through the valve seat air seal pipe are controlled through the electromagnetic valve and the valve seat air seal valve;

The cylinder drives the valve shaft to extend to the outer side of the rear bearing set;

The poppet valve further comprises a front sealing assembly, the front sealing assembly is fixed on one side close to the cylinder through bolts, and the cylinder, the front sealing assembly, the valve shaft and the valve seat are coaxially installed.

Further, the cylinder is fixedly mounted on a steel structure supporting frame connected with the lifting valve through a bolt, and the output end of the cylinder is in threaded connection with the valve shaft.

Further, the valve seat comprises a valve seat cylinder and a rear bearing group fixed on the valve seat, an air seal groove is formed in the valve seat cylinder, an air seal ring pipe and a plurality of air seal branch pipes which are uniformly distributed are arranged on the outer side of the valve seat cylinder, the air seal ring pipe is of a multi-semicircle structure, a valve seat air seal interface is arranged at the bottom of the air seal ring pipe, and the valve seat air seal interface is connected with the valve seat air seal pipe.

Further, the width of the air seal groove is 2-4 mm.

Further, a sealing cover is arranged on the front sealing assembly and fixedly mounted on the front bearing group through a fastening screw;

The sealing cover is provided with a shaft sleeve, and the sealing cover is matched with the shaft seal gland to press the sealing filler into the shaft sleeve.

Further, a valve shaft air seal pipe and a valve shaft air seal valve are arranged above the valve plate, wherein the valve shaft air seal pipe is divided into two paths and respectively communicated with the front sealing assembly and the sealing cover of the valve seat, and the valve shaft air seal pipe is communicated with a valve shaft air seal interface on the sealing cover.

Further, the anti-deflection piece is arranged at the lower part of the valve plate and slides along the valve seat air seal pipe, so that the valve plate does not rotate.

Further, two holes are formed in the upper portion of the anti-deflection piece, an arc-shaped groove is formed in the lower portion of the anti-deflection piece, the anti-deflection piece is fixedly installed on the valve plate through the stainless steel bolt penetrating through the two holes in the upper portion of the anti-deflection piece, and the arc-shaped groove is formed in the lower portion of the anti-deflection piece and is placed right above the valve seat air seal pipe.

Further, the poppet valve adopts a pneumatic flat pushing structure, and comprises a main body structure formed by a cylinder, a front sealing assembly, a valve shaft, a valve plate, a valve seat and other parts, and then forms a multiple sealing structure with a valve shaft air seal pipe and a valve seat air seal pipe. Clean compressed gas is introduced, and a valve seat air seal and a front shaft air seal are added on the basis of the original packing sealing structure, so that all channels which possibly cause waste gas leakage are isolated, and the purpose of preventing waste gas leakage is achieved.

Further, the sealing surface of the valve seat cylinder is provided with an air seal groove, clean compressed gas is introduced into the air seal ring pipe and the air seal branch pipe to enter the valve seat cylinder, finally the clean compressed gas is sprayed out of the air seal groove, waste gas is isolated, ash removal and blowing are carried out on the sealing surfaces of the valve plate and the valve seat, and corrosion of harmful substances on the sealing surfaces is reduced.

Further, the sealing cover is installed to preceding seal assembly, and clean compressed gas gets into in the sealing cover through the valve shaft air seal interface on the sealing cover, prevents waste gas and dust entering, prevents that waste gas from leaking out through the valve shaft is sealed, protects preceding bearing set simultaneously and does not receive waste gas corruption and dust influence, for preceding bearing set cooling, extension preceding bearing set's life.

Further, a sealing cover is arranged on the rear bearing group of the valve seat, clean compressed gas enters the sealing cover through a valve shaft air sealing interface on the sealing cover, waste gas and dust are prevented from entering, the rear bearing group is cooled, and the bearing is protected.

Further, an electromagnetic valve is arranged at the inlet of the valve seat air seal pipe, remote automatic on-off of clean compressed gas is realized through the electromagnetic valve, and when the poppet valve receives a closing signal, an opening signal is sent to the electromagnetic valve, so that the air seal and purging ash removal functions of the valve plate are realized; when the lift valve receives the opening signal, a closing signal is sent to the electromagnetic valve, the air seal air source is cut off, the loss of clean compressed air is reduced, and the energy consumption and the cost for producing clean compressed air are further reduced and conveyed.

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

The utility model comprises a main body structure composed of a cylinder, a front sealing component, a valve shaft, a valve plate, a valve seat and other parts, and then forms a multiple sealing structure with a valve shaft air seal pipe and a valve seat air seal pipe. Clean compressed gas is introduced, and a valve seat air seal and a front shaft air seal are added on the basis of the original packing sealing structure, so that all channels which possibly cause waste gas leakage are isolated, and the purpose of preventing waste gas leakage is achieved.

The front sealing assembly is provided with the sealing cover, clean compressed gas enters the sealing cover through the valve shaft air sealing interface on the sealing cover, waste gas and dust are prevented from entering, the waste gas is prevented from leaking out through the valve shaft seal, the front bearing set is protected from being corroded by the waste gas and influenced by the dust, the bearing set is cooled, and the service life of the front bearing set is prolonged.

The sealing cover is arranged on the rear bearing group of the valve seat, clean compressed gas enters the sealing cover through the valve shaft air sealing interface on the sealing cover, waste gas and dust are prevented from entering, the rear bearing group is cooled, and the bearing is protected.

The utility model adopts a multiple sealing structure, optimizes the sealing performance of the lifting valve, reduces the leakage of waste gas and improves the cleaning efficiency of RTO.

Drawings

FIG. 1 is a schematic diagram of the structure of an RTO poppet valve of the present utility model;

FIG. 2 is a schematic view of a valve seat according to the present utility model;

FIG. 3 is a schematic cross-sectional view of a valve seat A-A of the present utility model;

FIG. 4 is a schematic view of a front seal assembly of the present utility model;

FIG. 5 is a schematic view of a seal cap of the present utility model;

FIG. 6 is a schematic view of an anti-deflection member according to the present utility model.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present utility model are included in the protection scope of the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

As shown in fig. 1-6, an RTO poppet valve adopts a pneumatic flat push structure, and comprises a cylinder 1 and a valve shaft 3 connected with the cylinder 1, wherein a valve plate 4 is arranged on the valve shaft 3, the valve plate 4 is matched with a valve seat 5, a valve seat air seal conveying pipeline consisting of a valve seat air seal pipe 7, an electromagnetic valve 8 and a valve seat air seal valve 9 is arranged below the valve plate 4, the valve seat air seal valve 9 is connected with external clean compressed gas, and the flow and the on-off of the clean compressed gas passing through the valve seat air seal pipe 7 are controlled through the electromagnetic valve 8 and the valve seat air seal valve 9;

The cylinder 1 drives the valve shaft 3 to extend to the outer side of the rear bearing set 55;

The poppet valve further comprises a front sealing assembly 2, the front sealing assembly 2 is fixed on one side close to the cylinder 1 through bolts, and the cylinder 1, the front sealing assembly 2, the valve shaft 3 and the valve seat 5 are coaxially arranged.

As shown in fig. 1, there is a schematic structural view of the RTO poppet valve of the present invention, shown in the open state. The cylinder 1, the front sealing assembly 2, the valve shaft 3 and the valve seat 5 are concentrically arranged, the valve plate 4 is fixedly arranged on the valve shaft 3, and the valve plate 4 and the valve seat 5 are in pressing contact by pushing of the cylinder 1, so that the closing function of the poppet valve is realized.

The lower part of the valve plate 4 is provided with a valve seat air seal conveying pipeline consisting of a valve seat air seal pipe 7, an electromagnetic valve 8 and a valve seat air seal valve 9, the valve seat air seal valve 9 is connected with external clean compressed gas which can be nitrogen, compressed air, treated waste gas and other gases with pressure and no harmful components. The flow rate and the on-off of clean compressed gas passing through the valve seat air seal pipe can be controlled through the electromagnetic valve 8 and the valve seat air seal valve 9. Before the poppet valve operates, the valve seat air seal valve 9 is firstly opened to a proper opening degree, then the electromagnetic valve 8 is set to be remotely and automatically controlled through a program, when the poppet valve receives a closing signal, an opening signal is sent to the electromagnetic valve 8, the cylinder 1 starts to start to rapidly push the valve plate 4 to the valve seat 5, at the moment, clean compressed gas enters the valve seat air seal pipe 7 along with the opening of the electromagnetic valve 8, before the valve plate 4 does not operate to the valve seat 5, the sealing surfaces of the valve plate 4 and the valve seat 5 are purged and ash cleaned, and when the valve plate 4 and the valve seat 5 are completely contacted, air seal is formed to realize the isolation of waste gas. When the lift valve receives the opening signal, a closing signal is sent to the electromagnetic valve 8, clean compressed gas is cut off, loss of the clean compressed gas is reduced, and production cost is reduced. The valve shaft air seal pipe 10 and the valve shaft air seal valve 11 are arranged above the valve plate 4, wherein the valve shaft air seal pipe 10 is divided into two paths and respectively communicated into the front sealing assembly 2 and the sealing cover 23 of the valve seat 5, and the functions of air seal for isolating waste gas and protecting an internal bearing are achieved.

As shown in fig. 2 and 3, the valve seat cylinder 51 in the valve seat 5 has a gas seal groove 56. The outside of the valve seat cylinder 51 is provided with an air seal ring pipe 52 and a plurality of air seal branch pipes 53 which are uniformly distributed, and the air seal ring pipe is of a multi-semicircle structure, thereby providing convenience for the installation of the valve seat 5. The bottom of the air seal ring pipe 52 is provided with a valve seat air seal interface 54, and the valve seat air seal interface 54 is connected with the valve seat air seal pipe 7. After the electromagnetic valve 8 is opened, clean compressed gas enters the valve seat air seal pipe 7, enters the air seal ring pipe 52 through the valve seat air seal interface 54, is split into the valve seat barrel 51 through the air seal branch pipe 53, and is sprayed out from the air seal groove 56. More preferably, the width of the air seal groove 56 is 2-4 mm, which can better maintain the air seal pressure and reduce clean compressed gas consumption.

As shown in fig. 4, the front seal assembly 2 is provided with a seal cover 23, and the seal cover 23 is fixedly mounted to the front bearing group 21 by a fastening screw 22. The valve shaft air seal pipe is communicated with a valve shaft air seal interface 231 on the sealing cover 23, and clean compressed gas enters the valve shaft air seal pipe 10 through the valve shaft air seal valve 11 and enters the sealing cover 23 of the front bearing group 21. To enhance the sealing effect, the seal cap may preferably be provided with a shaft sleeve 232 as shown in fig. 5, and the seal packing 25 is pressed into the shaft sleeve 232 with the shaft seal gland 24.

As shown in fig. 6, the upper part of the anti-deflection member 6 is provided with two holes, the lower part is provided with arc grooves, the anti-deflection member 6 is fixedly installed on the valve plate 4 by using a stainless steel bolt to penetrate through the two holes on the upper part, the arc grooves are arranged on the lower part and are placed right above the valve seat air seal pipe 9, and when the valve plate is in opening and closing movement, the valve seat air seal pipe 9 stops the arc grooves on the lower part of the anti-deflection member 6 from rotating, so that the deflection of the valve plate is prevented. The valve plate rotates to drive the valve shaft to rotate, so that the valve shaft and the connecting threads of the cylinder rotate, the valve plate stroke changes, and the valve plate and the valve seat are not tightly sealed, so that sealing failure is caused.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. An RTO poppet valve, characterized by: the lifting valve adopts a pneumatic flat-pushing structure and comprises a cylinder (1) and a valve shaft (3) connected with the cylinder (1), a valve plate (4) is arranged on the valve shaft (3), the valve plate (4) is matched with a valve seat (5), a valve seat air seal conveying pipeline consisting of a valve seat air seal pipe (7), an electromagnetic valve (8) and a valve seat air seal valve (9) is arranged below the valve plate (4), the valve seat air seal valve (9) is connected with external clean compressed gas, and the flow and the on-off of the clean compressed gas passing through the valve seat air seal pipe (7) are controlled through the electromagnetic valve (8) and the valve seat air seal valve (9);

The cylinder (1) drives the valve shaft (3) to extend to the outer side of the rear bearing group (55);

The poppet valve further comprises a front sealing assembly (2), the front sealing assembly (2) is fixed on one side close to the air cylinder (1) through bolts, and the air cylinder (1), the front sealing assembly (2), the valve shaft (3) and the valve seat (5) are installed coaxially.

2. The RTO poppet valve of claim 1, wherein: the cylinder (1) is fixedly arranged on a steel structure supporting frame connected with the lifting valve through a bolt, and the output end of the cylinder (1) is in threaded connection with the valve shaft (3).

3. The RTO poppet valve of claim 2, wherein: the valve seat (5) comprises a valve seat cylinder (51) and a rear bearing group (55) fixed on the valve seat (5), an air seal groove (56) is formed in the valve seat cylinder (51), an air seal ring pipe (52) and a plurality of air seal branch pipes (53) which are uniformly distributed are arranged on the outer side of the valve seat cylinder (51), the air seal ring pipe (52) is of a multi-semicircle structure, a valve seat air seal interface (54) is formed in the bottom of the air seal ring pipe (52), and the valve seat air seal interface (54) is connected with the valve seat air seal pipe (7).

4. The RTO poppet valve of claim 3, wherein: the width of the air seal groove (56) is 2-4 mm.

5. The RTO poppet valve of claim 4, wherein: the front sealing assembly (2) is provided with a sealing cover (23), and the sealing cover (23) is fixedly arranged on the front bearing group (21) through a fastening screw (22);

The sealing cover (23) is provided with a shaft sleeve (232), and the sealing cover (23) is matched with the shaft seal gland (24) to press the sealing filler (25) into the shaft sleeve (232).

6. The RTO poppet valve of claim 5, wherein: the valve is characterized in that a valve shaft air seal pipe (10) and a valve shaft air seal valve (11) are arranged above the valve plate (4), the valve shaft air seal pipe (10) is divided into two paths and respectively communicated with the front sealing assembly (2) and the sealing cover (23) of the valve seat (5), and the valve shaft air seal pipe (10) is communicated with a valve shaft air seal interface (231) on the sealing cover (23).

7. The RTO poppet valve of claim 6, wherein: the lower part of the valve plate (4) is provided with an anti-deflection piece (6) which slides along the valve seat air seal pipe (7) so that the valve plate does not rotate.

8. The RTO poppet valve of claim 7, wherein: the anti-deflection part (6) is provided with two holes on the upper part, the lower part is provided with an arc groove, the anti-deflection part (6) is fixedly arranged on the valve plate (4) through the two holes on the upper part by a stainless steel bolt, and the arc groove is arranged on the lower part and is placed right above the valve seat air seal pipe (7).