RTO valve of negative pressure air extraction sealing structure

Abstract

The utility model provides a kind of RTO valve of negative pressure air extraction sealing structure, including cylinder, push rod, valve leaf, RTO chamber body, negative pressure air duct and air extractor;The cylinder is installed on cylinder support, one end of the cylinder support is connected with air duct, away from cylinder, the telescopic end of the cylinder is connected the push rod, the push rod top end is connected the valve leaf by being provided with air duct, the valve leaf and push rod are arranged perpendicularly, guiding bushing is provided with push rod on the air duct, the guiding bushing and push rod airtight sliding connection;Air duct upper end is connected RTO chamber body, the RTO chamber body is provided with sealing seat body, negative pressure cavity is opened on the surface of sealing seat body lower end and with valve leaf contact, the negative pressure air duct is connected with negative pressure air duct, and the air extractor is connected on negative pressure air duct;Valve leaf and sealing seat body are plane pressure contact.The utility model uses the double sealing structure of plane pressure contact and negative pressure air extraction, improves the sealing of valve.

Description

Technical Field

[0001] This utility model belongs to the field of valve equipment technology, and in particular relates to an RTO valve with a negative pressure suction sealing structure. Background Technology

[0002] The RTO valve is a key component of the regenerative thermal oxidizer, responsible for periodically switching the airflow direction to achieve efficient heat exchange in the regenerator.

[0003] Existing RTO valves rely solely on the planar contact between the valve leaf and the sealing seat to achieve sealing. This sealing method is prone to leakage under high pressure or long-term use. Secondly, existing valves using rubber seals have a more complex structure than traditional valves, and replacing the rubber seals may require disassembling the entire valve, making maintenance and repair work cumbersome. Those skilled in the art urgently need to solve the above-mentioned technical problems. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, this utility model provides an RTO valve with a negative pressure suction sealing structure, which adopts a dual sealing structure of planar pressing contact and negative pressure suction to improve the valve's sealing performance.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An RTO valve with a negative pressure exhaust sealing structure includes a cylinder, a push rod, a valve leaf, an RTO chamber, a negative pressure exhaust pipe, and an exhaust fan;

[0007] The cylinder is mounted on a cylinder bracket. The end of the cylinder bracket opposite to the cylinder is connected to an air duct. The telescopic end of the cylinder is connected to the push rod. The top of the push rod passes through the air duct and connects to the valve leaf. The valve leaf is arranged perpendicular to the push rod. A guide sleeve through which the push rod passes is installed on the air duct. The guide sleeve and the push rod are airtightly slidably connected.

[0008] The upper end of the air duct is connected to the RTO chamber, the RTO chamber is provided with a sealing seat, a negative pressure chamber is opened on the lower end of the sealing seat and the surface in contact with the valve blade, the negative pressure chamber is connected to a negative pressure exhaust pipe, and the exhaust fan is connected to the negative pressure exhaust pipe.

[0009] The valve leaf and the sealing seat are in planar compression contact.

[0010] In a preferred embodiment of this utility model, the telescopic end of the cylinder is connected to the push rod via a floating joint.

[0011] In a preferred embodiment of the present invention, the negative pressure cavity has a rectangular cross-sectional shape, and the negative pressure cavity and the sealing seat are provided with a communicating opening, and the opening is smaller than the rectangular cavity of the negative pressure cavity.

[0012] In a preferred embodiment of the present invention, a butterfly valve is installed on the negative pressure exhaust pipe, and the butterfly valve is arranged between the RTO chamber and the exhaust fan.

[0013] In a preferred embodiment of this utility model, the negative pressure exhaust pipe is a stainless steel pipe.

[0014] In a preferred embodiment of this utility model, the butterfly valve is a pneumatic proportional valve, and the exhaust fan is a variable frequency fan.

[0015] In a preferred embodiment of this utility model, a clamping gap is reserved at the connection between the top of the push rod and the valve leaf.

[0016] In a preferred embodiment of the present invention, the valve leaf is provided with reinforcing ribs on its back side.

[0017] Beneficial effects:

[0018] This utility model discloses an RTO valve with a negative pressure suction sealing structure. When the cylinder is activated, its telescopic end pushes the push rod to move. Since the push rod is connected to the valve leaf, the movement of the push rod drives the valve leaf to move up and down in the air duct, thereby realizing the opening and closing of the valve.

[0019] A negative pressure chamber is provided on the surface of the sealing seat at the lower end of the RTO chamber that contacts the valve leaf. Gas is drawn out from the negative pressure chamber through the negative pressure exhaust pipe, so that negative pressure is formed in the negative pressure chamber. The contact surface between the valve leaf and the sealing seat is subjected to inward pressure, which can further enhance the sealing performance between the valve leaf and the sealing seat.

[0020] This utility model adopts a dual sealing structure of planar pressing contact and negative pressure air extraction to ensure that the valve leaf and the sealing seat can achieve extremely high sealing performance in the closed state, effectively preventing gas leakage.

[0021] The negative pressure extraction structure designed in this utility model can adapt to different working conditions through the action of the exhaust fan and the negative pressure chamber, and can maintain a stable sealing effect even in high pressure or large temperature change environments. Attached Figure Description

[0022] Figure 1 A schematic diagram of the closed state structure of an RTO valve with a negative pressure suction sealing structure provided by this utility model;

[0023] Figure 2 This utility model Figure 1 A magnified view of part A.

[0024] Figure 3 A schematic diagram of the open state structure of an RTO valve with a negative pressure vacuum sealing structure provided by this utility model;

[0025] Figure 4 This utility model Figure 3 A magnified view of section B.

[0026] In the diagram: Cylinder 1;

[0027] 2. Putting rod;

[0028] 3 valve blades;

[0029] 4RTO chamber body, 401 negative pressure chamber;

[0030] 5 negative pressure exhaust pipes;

[0031] 6 exhaust fans;

[0032] 7-cylinder bracket;

[0033] 8 air ducts;

[0034] 9. Guide bushings;

[0035] 10 floating joints;

[0036] 11. Butterfly valve. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0038] like Figure 1-4 As shown, this utility model provides an RTO valve with a negative pressure suction sealing structure, including a cylinder 1, a push rod 2, a valve leaf 3, an RTO chamber 4, a negative pressure suction pipe 5, and a fan 6.

[0039] The cylinder 1 is mounted on the cylinder bracket 7. The end of the cylinder bracket 7 opposite to the cylinder 1 is connected to the air duct 8. The telescopic end of the cylinder 1 is connected to the push rod 2. The top of the push rod 2 passes through the air duct 8 and is connected to the valve leaf 3. The valve leaf 3 is arranged perpendicular to the push rod 2. A guide sleeve 9 through which the push rod 2 passes is installed on the air duct 8. The guide sleeve 9 and the push rod 2 are airtightly slidably connected. The telescopic end of the cylinder 1 pushes the push rod 2 vertically to realize the movement of the valve leaf 3.

[0040] The upper end of the air duct 8 is connected to the RTO chamber 4, the RTO chamber 4 is provided with a sealing seat, and a negative pressure chamber 401 is opened on the lower end of the sealing seat and the surface in contact with the valve leaf 3. The negative pressure chamber 401 is connected to a negative pressure exhaust pipe 5, and the exhaust fan 6 is connected to the negative pressure exhaust pipe 5.

[0041] The valve leaf 3 and the sealing seat body are in planar pressing contact.

[0042] The working principle and beneficial effects of the above embodiments are as follows:

[0043] When the cylinder 1 is activated, its telescopic end pushes the push rod 2 to move. Since the push rod 2 is connected to the valve leaf 3, the movement of the push rod 2 causes the valve leaf 3 to move up and down in the air duct 8. When the valve leaf 3 moves downward, the valve opens and the gas enters the RTO chamber 4 through the air duct 8. When the valve leaf 3 moves upward, the valve closes and the valve leaf 3 is in close contact with the sealing seat, preventing the gas from passing through.

[0044] A negative pressure chamber 401 is provided on the surface of the sealing seat of the RTO chamber 4 that contacts the valve leaf 3. When the valve leaf 3 contacts the sealing seat, the contact surface between the negative pressure chamber 401 and the valve leaf 3 forms a sealing area. The negative pressure exhaust pipe 5 is connected to the negative pressure chamber 401, and an exhaust fan 6 is connected to the negative pressure exhaust pipe 5. When the exhaust fan 6 is working, gas is extracted from the negative pressure chamber 401 through the negative pressure exhaust pipe 5, so that a negative pressure is formed in the negative pressure chamber 401. The contact surface between the valve leaf 3 and the sealing seat is subjected to inward pressure, which further enhances the sealing performance between the valve leaf 3 and the sealing seat.

[0045] This utility model features a negative pressure suction sealing structure, which effectively reduces gas leakage. During operation, the valve does not require frequent adjustment or replacement of sealing components, and it also reduces wear between the valve leaf 3 and the sealing seat, thereby extending the overall service life of the valve.

[0046] In one embodiment,

[0047] The telescopic end of the cylinder 1 is connected to the push rod 2 via a floating joint 10. The floating joint 10 allows for angular or positional deviations between the telescopic end of the cylinder 1 and the push rod 2 within a certain range, ensuring smooth operation of the cylinder 1 and the push rod 2 and guaranteeing the normal opening or closing of the valve.

[0048] In one embodiment,

[0049] The negative pressure chamber 401 has a rectangular cross-sectional shape. The negative pressure chamber 401 has an opening that communicates with the sealing seat. The opening is smaller than the rectangular cavity of the negative pressure chamber 401, so that when the valve leaf 3 contacts the sealing seat, it can cover the entire opening area and form a larger contact area with the sealing seat, thereby enhancing the sealing between the two.

[0050] In one embodiment,

[0051] A butterfly valve 11 is installed on the negative pressure exhaust pipe 5. The butterfly valve 11 is arranged between the RTO chamber 4 and the exhaust fan 6, which can realize the adjustment and control of the airflow in the negative pressure exhaust pipe 5.

[0052] In one embodiment,

[0053] The aforementioned negative pressure exhaust pipe 5 is made of stainless steel, which is rust-proof and highly reliable.

[0054] In one embodiment,

[0055] The butterfly valve 11 mentioned above is a pneumatic proportional valve that can adjust the air volume and control the negative pressure value of the air chamber. The exhaust fan 6 is a variable frequency fan that can adjust the negative pressure value and control the negative pressure value of the air chamber.

[0056] In one embodiment,

[0057] The aforementioned push rod 2 has a pre-reserved clamping gap at the connection between its top and the valve leaf 3, which can control the degree of clamping between the valve leaf 3 and the sealing seat, thereby achieving a better sealing effect.

[0058] In one embodiment,

[0059] To enhance the bending resistance of the valve leaf 3, a reinforcing rib is provided on the back side of the valve leaf 3.

[0060] In summary:

[0061] This utility model discloses an RTO valve with a negative pressure suction sealing structure. When the cylinder is activated, its telescopic end pushes the push rod to move. Since the push rod is connected to the valve leaf, the movement of the push rod drives the valve leaf to move up and down in the air duct, thereby realizing the opening and closing of the valve.

[0062] A negative pressure chamber is provided on the surface of the sealing seat at the lower end of the RTO chamber that contacts the valve leaf. Gas is drawn out from the negative pressure chamber through the negative pressure exhaust pipe, so that negative pressure is formed in the negative pressure chamber. The contact surface between the valve leaf and the sealing seat is subjected to inward pressure, which can further enhance the sealing performance between the valve leaf and the sealing seat.

[0063] This utility model adopts a dual sealing structure of planar pressing contact and negative pressure air extraction to ensure that the valve leaf and the sealing seat can achieve extremely high sealing performance in the closed state, effectively preventing gas leakage.

[0064] The negative pressure extraction system designed in this utility model can adapt to different working conditions through the action of the exhaust fan and the negative pressure chamber, and can maintain a stable sealing effect even in environments with high pressure or large temperature changes.

[0065] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The terms "front," "back," "left," and "right" used in the text are not specific and are mainly for more intuitive illustration of the technical solution, and do not constitute a limitation. Those skilled in the art should understand that the above embodiments are only for illustrating the technical concept and features of this utility model, and their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the scope of protection of this utility model. All equivalent changes or modifications made according to the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. An RTO valve with a negative pressure suction sealing structure, characterized in that: It includes a cylinder (1), a push rod (2), a valve blade (3), an RTO chamber (4), a negative pressure exhaust pipe (5), and an exhaust fan (6); The cylinder (1) is mounted on the cylinder bracket (7). The cylinder bracket (7) is connected to the air duct (8) at the end away from the cylinder (1). The telescopic end of the cylinder (1) is connected to the push rod (2). The top of the push rod (2) passes through the air duct (8) and is connected to the valve leaf (3). The valve leaf (3) is arranged perpendicular to the push rod (2). A guide bushing (9) through which the push rod (2) passes is installed on the air duct (8). The guide bushing (9) and the push rod (2) are airtightly slidably connected. The upper end of the air duct (8) is connected to the RTO chamber (4). The RTO chamber (4) is provided with a sealing seat. A negative pressure chamber (401) is opened on the lower end of the sealing seat and on the surface in contact with the valve leaf (3). The negative pressure chamber (401) is connected to a negative pressure exhaust pipe (5). The exhaust fan (6) is connected to the negative pressure exhaust pipe (5). The valve leaf (3) and the sealing seat are in planar compression contact.

2. The RTO valve with a negative pressure suction sealing structure according to claim 1, characterized in that: The telescopic end of the cylinder (1) is connected to the push rod (2) via a floating joint (10).

3. The RTO valve with a negative pressure suction sealing structure according to claim 1, characterized in that: The negative pressure cavity (401) has a rectangular cross-sectional shape. The negative pressure cavity (401) and the sealing seat are provided with a communicating opening, and the opening is smaller than the rectangular cavity of the negative pressure cavity (401).

4. The RTO valve with a negative pressure extraction and sealing structure according to claim 1, characterized in that: A butterfly valve (11) is installed on the negative pressure exhaust pipe (5), and the butterfly valve (11) is arranged between the RTO chamber (4) and the exhaust fan (6).

5. The RTO valve with a negative pressure suction sealing structure according to claim 1, characterized in that: The negative pressure exhaust pipe (5) is a stainless steel pipe.

6. The RTO valve with a negative pressure suction sealing structure according to claim 4, characterized in that: The butterfly valve (11) is a pneumatic proportional valve, and the exhaust fan (6) is a variable frequency fan.

7. The RTO valve with a negative pressure suction sealing structure according to claim 1, characterized in that: A clamping gap is reserved at the connection between the top of the push rod (2) and the valve leaf (3).

8. The RTO valve with a negative pressure extraction and sealing structure according to claim 1, characterized in that: The valve leaf (3) has reinforcing ribs on its back side.

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