CN216555644U

CN216555644U - RTO poppet valve seals and improves structure

Info

Publication number: CN216555644U
Application number: CN202122766741.9U
Authority: CN
Inventors: 李雪松; 胡俊
Original assignee: Shanghai Yongjiang Environmental Engineering Co ltd
Current assignee: Shanghai Yongjiang Environmental Engineering Co ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-05-17
Anticipated expiration: 2031-11-12

Abstract

The utility model relates to the field of sealing, in particular to an improved structure for sealing an RTO poppet valve, which comprises a valve plate assembly, wherein a valve plate in the valve plate assembly is arranged on a shaft; the cylinder is connected with one end of the shaft and is arranged on the cylinder seat; the packing gland is connected with one side of the cylinder seat close to the valve plate; the valve plate is characterized by further comprising a spring, wherein the spring is sleeved on a bolt, and the bolt is arranged on one side, far away from the valve plate, of the packing gland; the first graphite rope is arranged in the packing gland, is matched with the shaft and is used for first sealing; the air sealing ring is arranged in the packing gland and used for compressing the first graphite rope, and compressed air is introduced into the air sealing ring for second sealing; and the second graphite rope is arranged on the inner side of the air sealing ring and used for third sealing. Compared with the prior art, the utility model has the advantages that: the sealing effect is improved by multiple sealing checkpoints; the valve plate has simple and reasonable structure, and reduces the friction among all the parts; the spring function is diversified, and the workable time of mechanism increases.

Description

Improved structure for sealing RTO poppet valve

Technical Field

The utility model relates to the technical field of sealing, in particular to an improved structure of an RTO poppet valve seal.

Background

In recent years, the emission of volatile organic compounds has been increasing, and the harm to the environment and human body has been receiving more and more attention, so that it is imperative to control the emission of VOCs. The most VOCs treatment technology adopted in the market at present is a combustion method, and a heat accumulating type thermal incineration (RTO for short) technology is mostly applied in the combustion method, and the principle is that organic waste gas is heated to 800-850 ℃ so that VOCs in the waste gas are oxidized and decomposed into carbon dioxide and water.

The lift valve is one of important devices in the RTO technology, the quality of the whole RTO is directly influenced by the quality of the sealing performance of the lift valve, and the treatment efficiency of waste gas is greatly reduced due to small waste gas leakage. The cover plate type poppet valve is a mainstream design of the waste gas switching valve, and compared with other air pipe switching valves, the cover plate type poppet valve has the advantages of being fast in opening and closing action, low in leakage rate and the like. However, in practical engineering application, the sealing plate is easy to wear, age and even deform due to frequent use, so that the leakage rate is increased. Particularly, when the RTO furnace is large in waste gas treatment amount, the diameter of a valve plate of a lift valve is increased, and the valve plate is impacted by high-speed airflow to generate vibration when the lift valve is opened/closed, so that the valve plate slightly deflects, waste gas leakage is caused, and the RTO treatment efficiency is influenced.

In present poppet valve, the graphite rope is too compressed tightly at the beginning, does not have the control of moment, leads to graphite rope consumption speed to accelerate, after operation a period, produces the clearance at once after the graphite rope consumption and between the axle, leads to sealedly, causes the gas-liquid in the furnace body even the solid leaks out.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects of the prior art and solve the problems that the filling seat of the lift valve and the valve rod cannot be sealed after running for a period of time and gas or liquid leaks out.

In order to achieve the aim, the improved RTO poppet valve sealing structure comprises a valve plate assembly, wherein a valve plate in the valve plate assembly is arranged on a shaft; the cylinder is connected with one end of the shaft and is arranged on the cylinder seat; the packing gland is connected with one side of the cylinder seat close to the valve plate; the valve plate is characterized by further comprising a spring, wherein the spring is sleeved on a bolt, and the bolt is arranged on one side, far away from the valve plate, of the packing gland; the first graphite rope is arranged in the packing gland, is matched with the shaft and is used for first sealing; the air sealing ring is arranged in the packing gland and used for compressing the first graphite rope, and compressed air is introduced into the air sealing ring for secondary sealing; and the second graphite rope is arranged on the inner side of the air sealing ring and used for third sealing.

The utility model also comprises the following preferable technical scheme:

preferably: the valve plate assembly comprises a ball clamping ring, clamping plates, an upper cover and a double-clamping-plate lower cover, the ball clamping ring is fixed on the shaft, the clamping plates are symmetrically arranged on two sides of the valve plate, and the upper cover and the double-clamping-plate lower cover are respectively arranged on the outer side of the valve plate.

Preferably: still include silica gel strip and adjusting shim, the right-hand member in the valve plate subassembly is filled to the silica gel strip, and the adjusting shim adds at the other end of valve plate subassembly.

Compared with the prior art, the utility model has the advantages that:

1. the sealing effect is improved by multiple sealing checkpoints;

2. the valve plate has a simpler and more reasonable structure, and the friction among all the parts is reduced;

3. the spring function is more diversified, and the working time of the mechanism is prolonged.

Drawings

FIG. 1 is an assembly view front elevation of the present invention;

FIG. 2 is a perspective view of the structure of the present invention;

FIG. 3 is an enlarged view of a portion of the present invention;

FIG. 4 is a view of a valve plate member of the present invention;

in the figure: 1. the valve comprises a valve plate assembly, a shaft, a valve seat supporting piece, a lifting valve seat plate reinforcing plate, a valve plate, a cylinder rear foot seat, a cylinder front foot seat, a cylinder seat, a packing gland, a first graphite rope, an air sealing ring, a second graphite rope, a snap ring, a clamping plate, an upper cover, a double-clamping-plate lower cover, a gasket, a silica gel strip, a regulating gasket, a spring, a valve seat and a dust cover lifting valve, wherein the shaft is 2, the valve seat supporting piece is 3, the lifting valve seat plate reinforcing plate is 4, the valve plate is 5, the cylinder is 6, the air sealing ring is 7, the second graphite rope is 13, the snap ring is 14, the clamping plate is 15, the upper cover is 16, the double-clamping-plate lower cover is 17, the gasket is 18, the silica gel strip is 19, the regulating gasket is 20, the spring is 22, and the dust cover lifting valve is 23.

Detailed Description

Referring to fig. 1 and 2, the valve plate assembly 1 is composed of a valve plate 5 and a valve seat 22, the valve seat 22 is fixed on a valve seat support 3, the valve seat support 3 forms a square structure, a lifting valve seat plate reinforcing plate 4 is further arranged, the valve plate 5 is arranged on a shaft 3 and is located in the middle of the square structure, the left end of the shaft 2 is connected with a cylinder 6, the cylinder 6 is fixed on a cylinder seat 9 through a cylinder front foot seat 7 and a cylinder rear foot seat 8, and a lifting valve dust cover 23 is arranged on the outer side of the cylinder 6.

Referring to fig. 3, a packing gland 10 is connected with one side of a cylinder block 9 close to a valve plate 5, a spring 21 is sleeved on a bolt and is arranged on one side, away from the valve plate 5, of the packing gland 10, a first graphite rope 11 is arranged in the packing gland 10 and is matched with a shaft 3 for first sealing, an air sealing ring 12 is arranged in the packing gland 10 and is used for compressing the first graphite rope 11, compressed air is introduced into the air sealing ring 12 for second sealing, and a second graphite rope 13 is arranged in the air sealing ring 12 and is used for third sealing.

The utility model increases the compression height of the original packing gland, the reference increment is 7-10 mm, and the instability phenomenon can occur when the compression height is too long, and the compression height is too short and has no corresponding application value. And a strong spring 21 is added on the outer side of the packing gland 10, and the length of the bolt is correspondingly increased. And calculating the compression amount of the spring according to the elastic coefficient and the number of the strong springs. Therefore, after the graphite rope is abraded, the graphite rope can still keep a certain pressing force due to the left and right sides of the spring, the graphite rope is enabled to realize sealing, and when the length of the spring is found to be changed during secondary inspection, the spring is only required to be screwed down to the length of the designed pretightening force again, and the process is repeated for many times until the packing gland 10 completely leans against the position of the packing seat.

Referring to fig. 4, the valve plate assembly 1 of the present invention is also more reasonable in structure, the valve plate assembly 1 includes a ball snap ring 14, a clamping plate 15, an upper cover 16 and a double-clamping plate lower cover 17, the ball snap ring 14 is fixed on the shaft 2, the clamping plate 15 is symmetrically disposed on both sides of the valve plate, the upper cover 16 and the double-clamping plate lower cover 17 are respectively disposed on the outer side of the valve plate 5, and the structural arrangement improves the stability of the valve plate assembly 1 and reduces unnecessary problems in the use process.

In this embodiment, in order to increase the stability and durability of the structure, a silicone strip 19, a spacer 18, and an adjustment spacer 20 are further provided.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be within the technical scope of the present invention, and the technical solutions and novel concepts according to the present invention with the equivalent replacement or change should be covered within the scope of the present invention.

Claims

1. An improved structure for RTO poppet valve seal comprises

The valve plate assembly is arranged on the shaft, and a valve plate in the valve plate assembly is arranged on the shaft;

the cylinder is connected with one end of the shaft and is arranged on the cylinder seat;

the packing gland is connected with one side of the cylinder seat close to the valve plate;

it is characterized by also comprising

The spring is sleeved on the bolt, and the bolt is arranged on one side, far away from the valve plate, of the packing gland;

the first graphite rope is arranged in the packing gland, is matched with the shaft and is used for first sealing;

the air sealing ring is arranged in the packing gland and used for compressing the first graphite rope, and compressed air is introduced into the air sealing ring for secondary sealing;

and the second graphite rope is arranged on the inner side of the air sealing ring and used for third sealing.

2. An improved RTO poppet valve seal structure as in claim 1, wherein the valve plate assembly comprises a ball retainer ring fixed to the shaft, clamping plates symmetrically disposed on either side of the valve plate, an upper cover and a double-clamped lower cover disposed on the outer side of the valve plate.

3. An improved RTO poppet valve seal structure as in claim 1, further comprising a silicone strip filled at the right end of the valve plate assembly and an adjusting shim added at the other end of the valve plate assembly.