RTO double-shut-off valve air seal device

Abstract

The utility model discloses an RTO double-shut-off-valve air sealing device in the technical field of incinerators, the RTO double-shut-off-valve air sealing device comprises a valve body, the valve body comprises a pipeline and two valve plates arranged at the two ends of the pipeline, the valve plates are controlled by a driving unit to be opened and closed, the side wall of the pipeline communicates with an air inlet pipe, and the other end of the air inlet pipe is connected with a fan; the two valve plates are arranged at the two ends of the valve body, and the high-pressure fan is arranged at the pipeline to blow air inwards, so that high-concentration waste gas is prevented from entering the incineration chamber; a sealing unit is arranged at each valve plate, each sealing unit comprises two semi-ring-shaped sealing assemblies, the two sealing assemblies are located on the inner side and the outer side of each valve plate respectively, and opening and closing of the valve plates are not hindered while the sealing performance is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of incinerators, and in particular relates to an RTO double-off valve gas sealing device. Background Art

[0002] The RTO (Regenerative Thermal Oxidizer, RTO for short) is a regenerative thermal oxidizer. Its principle is to oxidize organic matter (VOCs) in exhaust gas into corresponding carbon dioxide and water at high temperatures, thereby purifying the exhaust gas and recovering the heat released during the decomposition of the exhaust gas. The three-chamber RTO has an exhaust gas decomposition efficiency of over 99% and a heat recovery efficiency of over 95%. The RTO's main structure consists of a combustion chamber, a regenerator, and a shut-off valve. Different heat recovery methods and shut-off valve types can be selected according to the actual customer needs.

[0003] When the concentration of waste gas to be treated is high, the sealing effect of the shut-off valve needs to be ensured for safety reasons. However, the traditional RTO shut-off valve is inconvenient to operate, the sealing effect cannot meet expectations, the leakage rate is high, and it does not meet safety requirements. Utility Model Content

[0004] Purpose of the utility model: This application aims to solve the defects of the prior art mentioned in the above background technology and proposes an RTO double-off valve air sealing device.

[0005] Technical solution: An RTO double-off valve air sealing device includes a valve body, which includes a pipeline and two valve plates arranged at both ends of the pipeline. The valve plates are controlled to open and close by a driving unit. The side wall of the pipeline is connected to an air inlet pipe, and the other end of the air inlet pipe is connected to a fan.

[0006] Preferably, the valve plate is circular, and a valve shaft passing through the center of the circle is provided on the valve plate. The valve shaft passes through the outer wall of the pipeline. Two bearing seats are respectively provided at both ends of the valve shaft and located on the outer wall of the pipeline. The valve shaft is respectively installed on the two bearing seats through two bearings.

[0007] The valve shaft passes through the center of the valve plate, so that the rotation of the valve shaft can drive the valve plate to rotate, thereby realizing the opening and closing of the valve body.

[0008] Preferably, the driving unit includes a cylinder and a connecting rod hinged to the piston rod of the cylinder, one end of the connecting rod away from the piston rod is connected to one end of the valve shaft, and the connecting rod can drive the valve shaft to rotate.

[0009] The piston rod of the cylinder extends and retracts, thereby driving the connecting rod to rotate, and then driving the valve shaft to rotate, thereby driving the valve plate to rotate.

[0010] Preferably, the valve body is installed on a fixing frame, the fixing frame includes a fixing frame and a bracket installed on the fixing frame, the pipeline is installed on the bracket, two mounting seats are provided on the fixing frame, and the two cylinders are hingedly installed on the two mounting seats respectively.

[0011] The valve body is mounted on a fixing frame, thus having good stability; the cylinder is hingedly mounted on a mounting base, which has a good fixing effect and also enables the cylinder to drive the connecting rod to rotate.

[0012] Preferably, two sealing units are provided inside the pipeline, and the two sealing units correspond to the two valve plates respectively.

[0013] A sealing unit is provided at each valve plate to ensure the sealing of the valve body.

[0014] Preferably, the sealing unit includes two semi-annular sealing components, and the sealing components include a mounting plate and a sealing strip. The mounting plate is fixed to the inner wall of the pipeline in a semi-annular shape, and the cross-section of the mounting plate is L-shaped. The sealing strip is installed in the space formed between the mounting plate and the inner wall of the pipeline.

[0015] The sealing strip is installed in the annular space between the mounting plate and the inner wall of the pipeline, thereby achieving a good installation and fixing effect.

[0016] Preferably, the two sealing components of each sealing unit are respectively located on the inner side and the outer side of the corresponding valve plate, and the two sealing strips are both in contact with the valve plate.

[0017] The two sealing components are not connected to form a circle, but are staggered. When the valve plate is in the closed state, one sealing component is located on the outside of the baffle and the other sealing component is located on the inside of the baffle. This ensures the sealing of the valve body and does not hinder the opening and closing of the valve plate.

[0018] Preferably, a blocking valve is provided at the air inlet pipe.

[0019] Setting a blocking valve can control the amount of air entering the fan.

[0020] Preferably, the blocking valve is a pneumatic butterfly valve.

[0021] Preferably, flanges are provided at both ends of the pipeline.

[0022] The flange setting facilitates the connection between the valve body and the front and rear end equipment.

[0023] Preferably, a fixing seat is provided at the bottom of the fan.

[0024] The fixing base facilitates the installation and fixing of the fan.

[0025] Preferably, the fan is a high-pressure fan.

[0026] Beneficial effects:

[0027] 1. This application prevents high-concentration exhaust gas from entering the incineration chamber by setting two valve plates at both ends of the valve body and a high-pressure blower at the pipeline to blow air inward.

[0028] 2. A sealing unit is provided at each valve plate. Each sealing unit comprises two half-ring sealing components. The two sealing components are respectively located on the inner and outer sides of the valve plate, which improves the sealing performance while not hindering the opening and closing of the valve plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of this application from the first perspective;

[0030] Figure 2 for Figure 1 Enlarged view of point A in the middle

[0031] Figure 3 This is a schematic diagram of the structure from the second perspective of this application;

[0032] Figure 4 For this application Figure 3 Enlarged view of point B in the middle

[0033] Figure 5 For this application Figure 3 Enlarged view of point C in the middle;

[0034] Figure 6 This is a schematic diagram of the cross-sectional structure of the sealing assembly of the present application;

[0035] Figure markings: 1. Valve body; 1.1. Pipeline; 1.1.1. Flange; 1.2. Valve plate; 1.3. Valve shaft; 1.4. Bearing seat; 2. Air inlet pipe; 2.1. Blocking valve; 3. Fan; 4. Drive unit; 4.1. Cylinder; 4.1.1. Piston rod; 4.2. Connecting rod; 5. Fixing bracket; 5.1. Fixing frame; 5.2. Bracket; 6. Mounting seat; 7. Sealing unit; 7.1. Sealing assembly; 7.1.1. Mounting plate; 7.1.2. Sealing strip; 8. Fixing seat. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] like Figure 1-6 As shown: An RTO double-off valve air sealing device includes a valve body 1, which includes a pipeline 1.1 and two valve plates 1.2 arranged at both ends of the pipeline 1.1. The valve plates 1.2 are controlled to open and close by a drive unit 4. The side wall of the pipeline 1.1 is connected to an air inlet pipe 2, and the other end of the air inlet pipe 2 is connected to a fan 3.

[0038] The valve plate 1.2 is circular, and a valve shaft 1.3 passing through the center of the circle is provided at the valve plate 1.2. The valve shaft 1.3 passes through the outer wall of the pipeline 1.1. Two bearing seats 1.4 are respectively provided at both ends of the valve shaft 1.3 and located on the outer wall of the pipeline 1.1. The valve shaft 1.3 is respectively mounted on the two bearing seats 1.4 through two bearings; the driving unit 4 includes a cylinder 4.1 and a connecting rod 4.2 hinged at the piston rod 4.1.1 of the cylinder 4.1, and the end of the connecting rod 4.2 away from the piston rod 4.1.1 is connected to one end of the valve shaft 1.3, and the connecting rod 4.2 can drive the valve shaft 1.3 to rotate; the valve body 1 is mounted on the fixing bracket 5, and the fixing bracket 5 includes a fixing frame 5.1 and a bracket 5.2 mounted on the fixing frame 5.1. The pipeline 1.1 is mounted on the bracket 5.2. Two mounting seats 6 are provided on the fixing frame 5.1. The two cylinders 4.1 are respectively Hingedly mounted at the two mounting seats 6; two sealing units 7 are provided inside the pipeline 1.1, and the two sealing units 7 correspond to the two valve plates 1.2 respectively; the sealing unit 7 includes two semi-annular sealing components 7.1, and the sealing component 7.1 includes a mounting plate 7.1.1 and a sealing strip 7.1.2, the mounting plate 7.1.1 is fixed to the inner wall of the pipeline 1.1 and is semi-annular, and the cross-section of the mounting plate 7.1.1 is L-shaped, and the sealing strip 7.1.2 is installed in the space formed between the mounting plate 7.1.1 and the pipeline 1.1; the two sealing components 7.1 of each sealing unit 7 are respectively located on the inner and outer sides of the corresponding valve plate 1.2, and the two sealing strips 7.1.2 both abut against the valve plate 1.2; a blocking valve 2.1 is provided at the air inlet pipe 2; flanges 1.1.1 are provided at both ends of the pipeline 1.1; a fixing seat 8 is provided at the bottom of the fan 3.

[0039] Working principle: During normal operation, the two valve plates are in the open state, and the exhaust gas passes through the pipeline and enters the incinerator for treatment; when it is detected that the exhaust gas concentration exceeds the treatment capacity of the regenerative thermal incinerator, the bypass valve at the front end of the double-blocking valve opens, and emergency discharge is carried out through the bypass valve. At this time, the double-blocking valve plate is closed, and the high-pressure fan starts to draw fresh air into the pipeline. After the air enters the pipeline, it fills the pipeline, thereby preventing high-concentration exhaust gas from entering the regenerative thermal incinerator.

[0040] The double-off valve has good sealing performance and can effectively prevent the leakage of exhaust gas, ensuring the safe and stable operation of the regenerative incinerator.

[0041] Although the present invention has been illustrated and described with respect to preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made to the present invention without departing from the scope of the present invention as defined by the claims.

Claims

1. An RTO double-off valve gas sealing device, comprising a valve body, characterized in that: The valve body includes a pipeline and two valve plates arranged at both ends of the pipeline, the valve plates are controlled to be opened and closed by a driving unit, the side wall of the pipeline is connected to an air inlet pipe, and the other end of the air inlet pipe is connected to a fan; the valve plate is circular, and a valve shaft passing through the center of the circle is provided at the valve plate, and the valve shaft passes through the outer wall of the pipeline, and two bearing seats are provided at both ends of the valve shaft and on the outer wall of the pipeline, and the valve shaft is respectively installed on the two bearing seats through two bearings; the driving unit includes a cylinder and a connecting rod hinged at the piston rod of the cylinder, the end of the connecting rod away from the piston rod is connected to one end of the valve shaft, and the connecting rod can drive the valve shaft to rotate; the valve body is installed on a fixing frame, and the fixing frame includes a fixing frame and a mounting frame The pipeline is installed on the bracket on the fixed frame, and two mounting seats are provided on the fixed frame, and the two cylinders are hingedly installed on the two mounting seats respectively; two sealing units are provided inside the pipeline, and the two sealing units correspond to the two valve plates respectively; the sealing unit includes two semi-annular sealing components, and the sealing component includes a mounting plate and a sealing strip, the mounting plate is fixed to the inner wall of the pipeline in a semi-annular shape, and the cross-section of the mounting plate is L-shaped, and the sealing strip is installed in the space formed between the mounting plate and the pipeline; the two sealing components of each sealing unit are respectively located on the inner and outer sides of the corresponding valve plate, and the two sealing strips are both against the valve plate; a fixed seat is provided at the bottom of the fan.

2. The RTO double-off valve gas sealing device according to claim 1, characterized in that: A blocking valve is provided at the air inlet pipe.

3. The RTO double-off valve gas sealing device according to claim 1, characterized in that: Both ends of the pipeline are provided with flanges.

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